1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ 2 3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 4 5 6 #include <linux/module.h> 7 #include <linux/kernel.h> 8 #include <linux/mm.h> 9 #include <linux/pci.h> 10 #include <linux/errno.h> 11 #include <linux/atm.h> 12 #include <linux/atmdev.h> 13 #include <linux/sonet.h> 14 #include <linux/skbuff.h> 15 #include <linux/time.h> 16 #include <linux/delay.h> 17 #include <linux/uio.h> 18 #include <linux/init.h> 19 #include <linux/atm_eni.h> 20 #include <linux/bitops.h> 21 #include <asm/system.h> 22 #include <asm/io.h> 23 #include <asm/atomic.h> 24 #include <asm/uaccess.h> 25 #include <asm/string.h> 26 #include <asm/byteorder.h> 27 28 #include "tonga.h" 29 #include "midway.h" 30 #include "suni.h" 31 #include "eni.h" 32 33 #if !defined(__i386__) && !defined(__x86_64__) 34 #ifndef ioremap_nocache 35 #define ioremap_nocache(X,Y) ioremap(X,Y) 36 #endif 37 #endif 38 39 /* 40 * TODO: 41 * 42 * Show stoppers 43 * none 44 * 45 * Minor 46 * - OAM support 47 * - fix bugs listed below 48 */ 49 50 /* 51 * KNOWN BUGS: 52 * 53 * - may run into JK-JK bug and deadlock 54 * - should allocate UBR channel first 55 * - buffer space allocation algorithm is stupid 56 * (RX: should be maxSDU+maxdelay*rate 57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 58 * - doesn't support OAM cells 59 * - eni_put_free may hang if not putting memory fragments that _complete_ 60 * 2^n block (never happens in real life, though) 61 */ 62 63 64 #if 0 65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 66 #else 67 #define DPRINTK(format,args...) 68 #endif 69 70 71 #ifndef CONFIG_ATM_ENI_TUNE_BURST 72 #define CONFIG_ATM_ENI_BURST_TX_8W 73 #define CONFIG_ATM_ENI_BURST_RX_4W 74 #endif 75 76 77 #ifndef CONFIG_ATM_ENI_DEBUG 78 79 80 #define NULLCHECK(x) 81 82 #define EVENT(s,a,b) 83 84 85 static void event_dump(void) 86 { 87 } 88 89 90 #else 91 92 93 /* 94 * NULL pointer checking 95 */ 96 97 #define NULLCHECK(x) \ 98 if ((unsigned long) (x) < 0x30) \ 99 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 100 101 /* 102 * Very extensive activity logging. Greatly improves bug detection speed but 103 * costs a few Mbps if enabled. 104 */ 105 106 #define EV 64 107 108 static const char *ev[EV]; 109 static unsigned long ev_a[EV],ev_b[EV]; 110 static int ec = 0; 111 112 113 static void EVENT(const char *s,unsigned long a,unsigned long b) 114 { 115 ev[ec] = s; 116 ev_a[ec] = a; 117 ev_b[ec] = b; 118 ec = (ec+1) % EV; 119 } 120 121 122 static void event_dump(void) 123 { 124 int n,i; 125 126 for (n = 0; n < EV; n++) { 127 i = (ec+n) % EV; 128 printk(KERN_NOTICE); 129 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 130 } 131 } 132 133 134 #endif /* CONFIG_ATM_ENI_DEBUG */ 135 136 137 /* 138 * NExx must not be equal at end 139 * EExx may be equal at end 140 * xxPJOK verify validity of pointer jumps 141 * xxPMOK operating on a circular buffer of "c" words 142 */ 143 144 #define NEPJOK(a0,a1,b) \ 145 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 146 #define EEPJOK(a0,a1,b) \ 147 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 148 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 149 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 150 151 152 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 153 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 154 putting = 0; 155 156 static struct atm_dev *eni_boards = NULL; 157 158 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */ 159 static dma_addr_t zeroes; 160 161 /* Read/write registers on card */ 162 #define eni_in(r) readl(eni_dev->reg+(r)*4) 163 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) 164 165 166 /*-------------------------------- utilities --------------------------------*/ 167 168 169 static void dump_mem(struct eni_dev *eni_dev) 170 { 171 int i; 172 173 for (i = 0; i < eni_dev->free_len; i++) 174 printk(KERN_DEBUG " %d: %p %d\n",i, 175 eni_dev->free_list[i].start, 176 1 << eni_dev->free_list[i].order); 177 } 178 179 180 static void dump(struct atm_dev *dev) 181 { 182 struct eni_dev *eni_dev; 183 184 int i; 185 186 eni_dev = ENI_DEV(dev); 187 printk(KERN_NOTICE "Free memory\n"); 188 dump_mem(eni_dev); 189 printk(KERN_NOTICE "TX buffers\n"); 190 for (i = 0; i < NR_CHAN; i++) 191 if (eni_dev->tx[i].send) 192 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, 193 eni_dev->tx[i].send,eni_dev->tx[i].words*4); 194 printk(KERN_NOTICE "RX buffers\n"); 195 for (i = 0; i < 1024; i++) 196 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) 197 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, 198 ENI_VCC(eni_dev->rx_map[i])->recv, 199 ENI_VCC(eni_dev->rx_map[i])->words*4); 200 printk(KERN_NOTICE "----\n"); 201 } 202 203 204 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, 205 unsigned long size) 206 { 207 struct eni_free *list; 208 int len,order; 209 210 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); 211 start += eni_dev->base_diff; 212 list = eni_dev->free_list; 213 len = eni_dev->free_len; 214 while (size) { 215 if (len >= eni_dev->free_list_size) { 216 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", 217 start,size); 218 break; 219 } 220 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); 221 if (MID_MIN_BUF_SIZE > (1 << order)) { 222 printk(KERN_CRIT "eni_put_free: order %d too small\n", 223 order); 224 break; 225 } 226 list[len].start = (void __iomem *) start; 227 list[len].order = order; 228 len++; 229 start += 1 << order; 230 size -= 1 << order; 231 } 232 eni_dev->free_len = len; 233 /*dump_mem(eni_dev);*/ 234 } 235 236 237 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) 238 { 239 struct eni_free *list; 240 void __iomem *start; 241 int len,i,order,best_order,index; 242 243 list = eni_dev->free_list; 244 len = eni_dev->free_len; 245 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; 246 if (*size > MID_MAX_BUF_SIZE) return NULL; 247 for (order = 0; (1 << order) < *size; order++); 248 DPRINTK("trying: %ld->%d\n",*size,order); 249 best_order = 65; /* we don't have more than 2^64 of anything ... */ 250 index = 0; /* silence GCC */ 251 for (i = 0; i < len; i++) 252 if (list[i].order == order) { 253 best_order = order; 254 index = i; 255 break; 256 } 257 else if (best_order > list[i].order && list[i].order > order) { 258 best_order = list[i].order; 259 index = i; 260 } 261 if (best_order == 65) return NULL; 262 start = list[index].start-eni_dev->base_diff; 263 list[index] = list[--len]; 264 eni_dev->free_len = len; 265 *size = 1 << order; 266 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 267 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 268 memset_io(start,0,*size); /* never leak data */ 269 /*dump_mem(eni_dev);*/ 270 return start; 271 } 272 273 274 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 275 unsigned long size) 276 { 277 struct eni_free *list; 278 int len,i,order; 279 280 start += eni_dev->base_diff; 281 list = eni_dev->free_list; 282 len = eni_dev->free_len; 283 for (order = -1; size; order++) size >>= 1; 284 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 285 for (i = 0; i < len; i++) 286 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 287 list[i].order == order) { 288 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 289 list[i].start,start,1 << order,list[i].order,order); 290 list[i] = list[--len]; 291 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 292 order++; 293 i = -1; 294 continue; 295 } 296 if (len >= eni_dev->free_list_size) { 297 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 298 order); 299 return; 300 } 301 list[len].start = start; 302 list[len].order = order; 303 eni_dev->free_len = len+1; 304 /*dump_mem(eni_dev);*/ 305 } 306 307 308 /*----------------------------------- RX ------------------------------------*/ 309 310 311 #define ENI_VCC_NOS ((struct atm_vcc *) 1) 312 313 314 static void rx_ident_err(struct atm_vcc *vcc) 315 { 316 struct atm_dev *dev; 317 struct eni_dev *eni_dev; 318 struct eni_vcc *eni_vcc; 319 320 dev = vcc->dev; 321 eni_dev = ENI_DEV(dev); 322 /* immediately halt adapter */ 323 eni_out(eni_in(MID_MC_S) & 324 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 325 /* dump useful information */ 326 eni_vcc = ENI_VCC(vcc); 327 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 328 "mismatch\n",dev->number); 329 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 330 eni_vcc->rxing,eni_vcc->words); 331 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 332 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 333 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 334 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 335 eni_vcc->servicing); 336 EVENT("---dump ends here---\n",0,0); 337 printk(KERN_NOTICE "---recent events---\n"); 338 event_dump(); 339 ENI_DEV(dev)->fast = NULL; /* really stop it */ 340 ENI_DEV(dev)->slow = NULL; 341 skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 342 } 343 344 345 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 346 unsigned long skip,unsigned long size,unsigned long eff) 347 { 348 struct eni_dev *eni_dev; 349 struct eni_vcc *eni_vcc; 350 u32 dma_rd,dma_wr; 351 u32 dma[RX_DMA_BUF*2]; 352 dma_addr_t paddr; 353 unsigned long here; 354 int i,j; 355 356 eni_dev = ENI_DEV(vcc->dev); 357 eni_vcc = ENI_VCC(vcc); 358 paddr = 0; /* GCC, shut up */ 359 if (skb) { 360 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 361 PCI_DMA_FROMDEVICE); 362 ENI_PRV_PADDR(skb) = paddr; 363 if (paddr & 3) 364 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 365 "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 366 vcc->vci,(unsigned long) paddr); 367 ENI_PRV_SIZE(skb) = size+skip; 368 /* PDU plus descriptor */ 369 ATM_SKB(skb)->vcc = vcc; 370 } 371 j = 0; 372 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 373 here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 374 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 375 << MID_DMA_VCI_SHIFT) | MID_DT_JK; 376 j++; 377 } 378 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 379 if (!eff) size += skip; 380 else { 381 unsigned long words; 382 383 if (!size) { 384 DPRINTK("strange things happen ...\n"); 385 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 386 size,eff); 387 } 388 words = eff; 389 if (paddr & 15) { 390 unsigned long init; 391 392 init = 4-((paddr & 15) >> 2); 393 if (init > words) init = words; 394 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 395 (vcc->vci << MID_DMA_VCI_SHIFT); 396 dma[j++] = paddr; 397 paddr += init << 2; 398 words -= init; 399 } 400 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 401 if (words & ~15) { 402 dma[j++] = MID_DT_16W | ((words >> 4) << 403 MID_DMA_COUNT_SHIFT) | (vcc->vci << 404 MID_DMA_VCI_SHIFT); 405 dma[j++] = paddr; 406 paddr += (words & ~15) << 2; 407 words &= 15; 408 } 409 #endif 410 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 411 if (words & ~7) { 412 dma[j++] = MID_DT_8W | ((words >> 3) << 413 MID_DMA_COUNT_SHIFT) | (vcc->vci << 414 MID_DMA_VCI_SHIFT); 415 dma[j++] = paddr; 416 paddr += (words & ~7) << 2; 417 words &= 7; 418 } 419 #endif 420 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 421 if (words & ~3) { 422 dma[j++] = MID_DT_4W | ((words >> 2) << 423 MID_DMA_COUNT_SHIFT) | (vcc->vci << 424 MID_DMA_VCI_SHIFT); 425 dma[j++] = paddr; 426 paddr += (words & ~3) << 2; 427 words &= 3; 428 } 429 #endif 430 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 431 if (words & ~1) { 432 dma[j++] = MID_DT_2W | ((words >> 1) << 433 MID_DMA_COUNT_SHIFT) | (vcc->vci << 434 MID_DMA_VCI_SHIFT); 435 dma[j++] = paddr; 436 paddr += (words & ~1) << 2; 437 words &= 1; 438 } 439 #endif 440 if (words) { 441 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 442 | (vcc->vci << MID_DMA_VCI_SHIFT); 443 dma[j++] = paddr; 444 } 445 } 446 if (size != eff) { 447 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 448 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 449 j++; 450 } 451 if (!j || j > 2*RX_DMA_BUF) { 452 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 453 goto trouble; 454 } 455 dma[j-2] |= MID_DMA_END; 456 j = j >> 1; 457 dma_wr = eni_in(MID_DMA_WR_RX); 458 dma_rd = eni_in(MID_DMA_RD_RX); 459 /* 460 * Can I move the dma_wr pointer by 2j+1 positions without overwriting 461 * data that hasn't been read (position of dma_rd) yet ? 462 */ 463 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 464 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 465 vcc->dev->number); 466 goto trouble; 467 } 468 for (i = 0; i < j; i++) { 469 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 470 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 471 dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 472 } 473 if (skb) { 474 ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 475 skb_queue_tail(&eni_dev->rx_queue,skb); 476 eni_vcc->last = skb; 477 rx_enqueued++; 478 } 479 eni_vcc->descr = here; 480 eni_out(dma_wr,MID_DMA_WR_RX); 481 return 0; 482 483 trouble: 484 if (paddr) 485 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len, 486 PCI_DMA_FROMDEVICE); 487 if (skb) dev_kfree_skb_irq(skb); 488 return -1; 489 } 490 491 492 static void discard(struct atm_vcc *vcc,unsigned long size) 493 { 494 struct eni_vcc *eni_vcc; 495 496 eni_vcc = ENI_VCC(vcc); 497 EVENT("discard (size=%ld)\n",size,0); 498 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); 499 /* could do a full fallback, but that might be more expensive */ 500 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; 501 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); 502 } 503 504 505 /* 506 * TODO: should check whether direct copies (without DMA setup, dequeuing on 507 * interrupt, etc.) aren't much faster for AAL0 508 */ 509 510 static int rx_aal0(struct atm_vcc *vcc) 511 { 512 struct eni_vcc *eni_vcc; 513 unsigned long descr; 514 unsigned long length; 515 struct sk_buff *skb; 516 517 DPRINTK(">rx_aal0\n"); 518 eni_vcc = ENI_VCC(vcc); 519 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 520 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 521 rx_ident_err(vcc); 522 return 1; 523 } 524 if (descr & MID_RED_T) { 525 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 526 vcc->dev->number); 527 length = 0; 528 atomic_inc(&vcc->stats->rx_err); 529 } 530 else { 531 length = ATM_CELL_SIZE-1; /* no HEC */ 532 } 533 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; 534 if (!skb) { 535 discard(vcc,length >> 2); 536 return 0; 537 } 538 skb_put(skb,length); 539 skb->tstamp = eni_vcc->timestamp; 540 DPRINTK("got len %ld\n",length); 541 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; 542 eni_vcc->rxing++; 543 return 0; 544 } 545 546 547 static int rx_aal5(struct atm_vcc *vcc) 548 { 549 struct eni_vcc *eni_vcc; 550 unsigned long descr; 551 unsigned long size,eff,length; 552 struct sk_buff *skb; 553 554 EVENT("rx_aal5\n",0,0); 555 DPRINTK(">rx_aal5\n"); 556 eni_vcc = ENI_VCC(vcc); 557 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 558 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 559 rx_ident_err(vcc); 560 return 1; 561 } 562 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { 563 if (descr & MID_RED_T) { 564 EVENT("empty cell (descr=0x%lx)\n",descr,0); 565 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 566 vcc->dev->number); 567 size = 0; 568 } 569 else { 570 static unsigned long silence = 0; 571 572 if (time_after(jiffies, silence) || silence == 0) { 573 printk(KERN_WARNING DEV_LABEL "(itf %d): " 574 "discarding PDU(s) with CRC error\n", 575 vcc->dev->number); 576 silence = (jiffies+2*HZ)|1; 577 } 578 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 579 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, 580 size); 581 } 582 eff = length = 0; 583 atomic_inc(&vcc->stats->rx_err); 584 } 585 else { 586 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 587 DPRINTK("size=%ld\n",size); 588 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & 589 (eni_vcc->words-1)))*4) & 0xffff; 590 /* -trailer(2)+header(1) */ 591 if (length && length <= (size << 2)-8 && length <= 592 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; 593 else { /* ^ trailer length (8) */ 594 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, 595 length); 596 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " 597 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", 598 vcc->dev->number,vcc->vci,length,size << 2,descr); 599 length = eff = 0; 600 atomic_inc(&vcc->stats->rx_err); 601 } 602 } 603 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; 604 if (!skb) { 605 discard(vcc,size); 606 return 0; 607 } 608 skb_put(skb,length); 609 DPRINTK("got len %ld\n",length); 610 if (do_rx_dma(vcc,skb,1,size,eff)) return 1; 611 eni_vcc->rxing++; 612 return 0; 613 } 614 615 616 static inline int rx_vcc(struct atm_vcc *vcc) 617 { 618 void __iomem *vci_dsc; 619 unsigned long tmp; 620 struct eni_vcc *eni_vcc; 621 622 eni_vcc = ENI_VCC(vcc); 623 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; 624 EVENT("rx_vcc(1)\n",0,0); 625 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> 626 MID_VCI_DESCR_SHIFT)) { 627 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", 628 eni_vcc->descr,tmp); 629 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 630 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 631 MID_VCI_DESCR_SHIFT)); 632 if (ENI_VCC(vcc)->rx(vcc)) return 1; 633 } 634 /* clear IN_SERVICE flag */ 635 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); 636 /* 637 * If new data has arrived between evaluating the while condition and 638 * clearing IN_SERVICE, we wouldn't be notified until additional data 639 * follows. So we have to loop again to be sure. 640 */ 641 EVENT("rx_vcc(3)\n",0,0); 642 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) 643 >> MID_VCI_DESCR_SHIFT)) { 644 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", 645 eni_vcc->descr,tmp); 646 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 647 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 648 MID_VCI_DESCR_SHIFT)); 649 if (ENI_VCC(vcc)->rx(vcc)) return 1; 650 } 651 return 0; 652 } 653 654 655 static void poll_rx(struct atm_dev *dev) 656 { 657 struct eni_dev *eni_dev; 658 struct atm_vcc *curr; 659 660 eni_dev = ENI_DEV(dev); 661 while ((curr = eni_dev->fast)) { 662 EVENT("poll_rx.fast\n",0,0); 663 if (rx_vcc(curr)) return; 664 eni_dev->fast = ENI_VCC(curr)->next; 665 ENI_VCC(curr)->next = ENI_VCC_NOS; 666 barrier(); 667 ENI_VCC(curr)->servicing--; 668 } 669 while ((curr = eni_dev->slow)) { 670 EVENT("poll_rx.slow\n",0,0); 671 if (rx_vcc(curr)) return; 672 eni_dev->slow = ENI_VCC(curr)->next; 673 ENI_VCC(curr)->next = ENI_VCC_NOS; 674 barrier(); 675 ENI_VCC(curr)->servicing--; 676 } 677 } 678 679 680 static void get_service(struct atm_dev *dev) 681 { 682 struct eni_dev *eni_dev; 683 struct atm_vcc *vcc; 684 unsigned long vci; 685 686 DPRINTK(">get_service\n"); 687 eni_dev = ENI_DEV(dev); 688 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { 689 vci = readl(eni_dev->service+eni_dev->serv_read*4); 690 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); 691 vcc = eni_dev->rx_map[vci & 1023]; 692 if (!vcc) { 693 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " 694 "found\n",dev->number,vci); 695 continue; /* nasty but we try to go on anyway */ 696 /* @@@ nope, doesn't work */ 697 } 698 EVENT("getting from service\n",0,0); 699 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { 700 EVENT("double service\n",0,0); 701 DPRINTK("Grr, servicing VCC %ld twice\n",vci); 702 continue; 703 } 704 ENI_VCC(vcc)->timestamp = ktime_get_real(); 705 ENI_VCC(vcc)->next = NULL; 706 if (vcc->qos.rxtp.traffic_class == ATM_CBR) { 707 if (eni_dev->fast) 708 ENI_VCC(eni_dev->last_fast)->next = vcc; 709 else eni_dev->fast = vcc; 710 eni_dev->last_fast = vcc; 711 } 712 else { 713 if (eni_dev->slow) 714 ENI_VCC(eni_dev->last_slow)->next = vcc; 715 else eni_dev->slow = vcc; 716 eni_dev->last_slow = vcc; 717 } 718 putting++; 719 ENI_VCC(vcc)->servicing++; 720 } 721 } 722 723 724 static void dequeue_rx(struct atm_dev *dev) 725 { 726 struct eni_dev *eni_dev; 727 struct eni_vcc *eni_vcc; 728 struct atm_vcc *vcc; 729 struct sk_buff *skb; 730 void __iomem *vci_dsc; 731 int first; 732 733 eni_dev = ENI_DEV(dev); 734 first = 1; 735 while (1) { 736 skb = skb_dequeue(&eni_dev->rx_queue); 737 if (!skb) { 738 if (first) { 739 DPRINTK(DEV_LABEL "(itf %d): RX but not " 740 "rxing\n",dev->number); 741 EVENT("nothing to dequeue\n",0,0); 742 } 743 break; 744 } 745 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), 746 ENI_PRV_POS(skb)); 747 rx_dequeued++; 748 vcc = ATM_SKB(skb)->vcc; 749 eni_vcc = ENI_VCC(vcc); 750 first = 0; 751 vci_dsc = eni_dev->vci+vcc->vci*16; 752 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), 753 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, 754 eni_vcc->words)) { 755 EVENT("requeuing\n",0,0); 756 skb_queue_head(&eni_dev->rx_queue,skb); 757 break; 758 } 759 eni_vcc->rxing--; 760 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); 761 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 762 PCI_DMA_TODEVICE); 763 if (!skb->len) dev_kfree_skb_irq(skb); 764 else { 765 EVENT("pushing (len=%ld)\n",skb->len,0); 766 if (vcc->qos.aal == ATM_AAL0) 767 *(unsigned long *) skb->data = 768 ntohl(*(unsigned long *) skb->data); 769 memset(skb->cb,0,sizeof(struct eni_skb_prv)); 770 vcc->push(vcc,skb); 771 pushed++; 772 } 773 atomic_inc(&vcc->stats->rx); 774 } 775 wake_up(&eni_dev->rx_wait); 776 } 777 778 779 static int open_rx_first(struct atm_vcc *vcc) 780 { 781 struct eni_dev *eni_dev; 782 struct eni_vcc *eni_vcc; 783 unsigned long size; 784 785 DPRINTK("open_rx_first\n"); 786 eni_dev = ENI_DEV(vcc->dev); 787 eni_vcc = ENI_VCC(vcc); 788 eni_vcc->rx = NULL; 789 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; 790 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; 791 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= 792 MID_MAX_BUF_SIZE) 793 size = MID_MAX_BUF_SIZE; 794 eni_vcc->recv = eni_alloc_mem(eni_dev,&size); 795 DPRINTK("rx at 0x%lx\n",eni_vcc->recv); 796 eni_vcc->words = size >> 2; 797 if (!eni_vcc->recv) return -ENOBUFS; 798 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; 799 eni_vcc->descr = 0; 800 eni_vcc->rx_pos = 0; 801 eni_vcc->rxing = 0; 802 eni_vcc->servicing = 0; 803 eni_vcc->next = ENI_VCC_NOS; 804 return 0; 805 } 806 807 808 static int open_rx_second(struct atm_vcc *vcc) 809 { 810 void __iomem *here; 811 struct eni_dev *eni_dev; 812 struct eni_vcc *eni_vcc; 813 unsigned long size; 814 int order; 815 816 DPRINTK("open_rx_second\n"); 817 eni_dev = ENI_DEV(vcc->dev); 818 eni_vcc = ENI_VCC(vcc); 819 if (!eni_vcc->rx) return 0; 820 /* set up VCI descriptor */ 821 here = eni_dev->vci+vcc->vci*16; 822 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); 823 size = eni_vcc->words >> 8; 824 for (order = -1; size; order++) size >>= 1; 825 writel(0,here+4); /* descr, read = 0 */ 826 writel(0,here+8); /* write, state, count = 0 */ 827 if (eni_dev->rx_map[vcc->vci]) 828 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " 829 "in use\n",vcc->dev->number,vcc->vci); 830 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ 831 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << 832 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | 833 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << 834 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); 835 return 0; 836 } 837 838 839 static void close_rx(struct atm_vcc *vcc) 840 { 841 DECLARE_WAITQUEUE(wait,current); 842 void __iomem *here; 843 struct eni_dev *eni_dev; 844 struct eni_vcc *eni_vcc; 845 846 eni_vcc = ENI_VCC(vcc); 847 if (!eni_vcc->rx) return; 848 eni_dev = ENI_DEV(vcc->dev); 849 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { 850 here = eni_dev->vci+vcc->vci*16; 851 /* block receiver */ 852 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << 853 MID_VCI_MODE_SHIFT),here); 854 /* wait for receiver to become idle */ 855 udelay(27); 856 /* discard pending cell */ 857 writel(readl(here) & ~MID_VCI_IN_SERVICE,here); 858 /* don't accept any new ones */ 859 eni_dev->rx_map[vcc->vci] = NULL; 860 /* wait for RX queue to drain */ 861 DPRINTK("eni_close: waiting for RX ...\n"); 862 EVENT("RX closing\n",0,0); 863 add_wait_queue(&eni_dev->rx_wait,&wait); 864 set_current_state(TASK_UNINTERRUPTIBLE); 865 barrier(); 866 for (;;) { 867 /* transition service->rx: rxing++, servicing-- */ 868 if (!eni_vcc->servicing) { 869 barrier(); 870 if (!eni_vcc->rxing) break; 871 } 872 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, 873 eni_vcc->servicing); 874 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, 875 eni_vcc->rxing); 876 schedule(); 877 set_current_state(TASK_UNINTERRUPTIBLE); 878 } 879 for (;;) { 880 int at_end; 881 u32 tmp; 882 883 tasklet_disable(&eni_dev->task); 884 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; 885 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; 886 tasklet_enable(&eni_dev->task); 887 if (at_end) break; 888 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", 889 eni_vcc->rx_pos,tmp); 890 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", 891 eni_vcc->rx_pos,tmp); 892 schedule(); 893 set_current_state(TASK_UNINTERRUPTIBLE); 894 } 895 set_current_state(TASK_RUNNING); 896 remove_wait_queue(&eni_dev->rx_wait,&wait); 897 } 898 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); 899 eni_vcc->rx = NULL; 900 } 901 902 903 static int start_rx(struct atm_dev *dev) 904 { 905 struct eni_dev *eni_dev; 906 907 eni_dev = ENI_DEV(dev); 908 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); 909 if (!eni_dev->rx_map) { 910 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 911 dev->number); 912 free_page((unsigned long) eni_dev->free_list); 913 return -ENOMEM; 914 } 915 eni_dev->rx_mult = DEFAULT_RX_MULT; 916 eni_dev->fast = eni_dev->last_fast = NULL; 917 eni_dev->slow = eni_dev->last_slow = NULL; 918 init_waitqueue_head(&eni_dev->rx_wait); 919 skb_queue_head_init(&eni_dev->rx_queue); 920 eni_dev->serv_read = eni_in(MID_SERV_WRITE); 921 eni_out(0,MID_DMA_WR_RX); 922 return 0; 923 } 924 925 926 /*----------------------------------- TX ------------------------------------*/ 927 928 929 enum enq_res { enq_ok,enq_next,enq_jam }; 930 931 932 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 933 u32 size) 934 { 935 u32 init,words; 936 937 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 938 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 939 #if 0 /* don't complain anymore */ 940 if (paddr & 3) 941 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 942 if (size & 3) 943 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 944 #endif 945 if (paddr & 3) { 946 init = 4-(paddr & 3); 947 if (init > size || size < 7) init = size; 948 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 949 (unsigned long) paddr,init,size); 950 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 951 (chan << MID_DMA_CHAN_SHIFT); 952 dma[(*j)++] = paddr; 953 paddr += init; 954 size -= init; 955 } 956 words = size >> 2; 957 size &= 3; 958 if (words && (paddr & 31)) { 959 init = 8-((paddr & 31) >> 2); 960 if (init > words) init = words; 961 DPRINTK("put_dma: %lx DMA: %d/%d words\n", 962 (unsigned long) paddr,init,words); 963 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 964 (chan << MID_DMA_CHAN_SHIFT); 965 dma[(*j)++] = paddr; 966 paddr += init << 2; 967 words -= init; 968 } 969 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 970 if (words & ~15) { 971 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 972 (unsigned long) paddr,words >> 4,words); 973 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 974 | (chan << MID_DMA_CHAN_SHIFT); 975 dma[(*j)++] = paddr; 976 paddr += (words & ~15) << 2; 977 words &= 15; 978 } 979 #endif 980 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 981 if (words & ~7) { 982 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 983 (unsigned long) paddr,words >> 3,words); 984 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 985 | (chan << MID_DMA_CHAN_SHIFT); 986 dma[(*j)++] = paddr; 987 paddr += (words & ~7) << 2; 988 words &= 7; 989 } 990 #endif 991 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 992 if (words & ~3) { 993 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 994 (unsigned long) paddr,words >> 2,words); 995 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 996 | (chan << MID_DMA_CHAN_SHIFT); 997 dma[(*j)++] = paddr; 998 paddr += (words & ~3) << 2; 999 words &= 3; 1000 } 1001 #endif 1002 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 1003 if (words & ~1) { 1004 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 1005 (unsigned long) paddr,words >> 1,words); 1006 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 1007 | (chan << MID_DMA_CHAN_SHIFT); 1008 dma[(*j)++] = paddr; 1009 paddr += (words & ~1) << 2; 1010 words &= 1; 1011 } 1012 #endif 1013 if (words) { 1014 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 1015 words); 1016 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 1017 (chan << MID_DMA_CHAN_SHIFT); 1018 dma[(*j)++] = paddr; 1019 paddr += words << 2; 1020 } 1021 if (size) { 1022 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 1023 size); 1024 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 1025 (chan << MID_DMA_CHAN_SHIFT); 1026 dma[(*j)++] = paddr; 1027 } 1028 } 1029 1030 1031 static enum enq_res do_tx(struct sk_buff *skb) 1032 { 1033 struct atm_vcc *vcc; 1034 struct eni_dev *eni_dev; 1035 struct eni_vcc *eni_vcc; 1036 struct eni_tx *tx; 1037 dma_addr_t paddr; 1038 u32 dma_rd,dma_wr; 1039 u32 size; /* in words */ 1040 int aal5,dma_size,i,j; 1041 1042 DPRINTK(">do_tx\n"); 1043 NULLCHECK(skb); 1044 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1045 vcc = ATM_SKB(skb)->vcc; 1046 NULLCHECK(vcc); 1047 eni_dev = ENI_DEV(vcc->dev); 1048 NULLCHECK(eni_dev); 1049 eni_vcc = ENI_VCC(vcc); 1050 tx = eni_vcc->tx; 1051 NULLCHECK(tx); 1052 #if 0 /* Enable this for testing with the "align" program */ 1053 { 1054 unsigned int hack = *((char *) skb->data)-'0'; 1055 1056 if (hack < 8) { 1057 skb->data += hack; 1058 skb->len -= hack; 1059 } 1060 } 1061 #endif 1062 #if 0 /* should work now */ 1063 if ((unsigned long) skb->data & 3) 1064 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1065 "TX data\n",vcc->dev->number,vcc->vci); 1066 #endif 1067 /* 1068 * Potential future IP speedup: make hard_header big enough to put 1069 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1070 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1071 */ 1072 1073 aal5 = vcc->qos.aal == ATM_AAL5; 1074 /* check space in buffer */ 1075 if (!aal5) 1076 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1077 /* cell without HEC plus segmentation header (includes 1078 four-byte cell header) */ 1079 else { 1080 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1081 /* add AAL5 trailer */ 1082 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1083 /* add segmentation header */ 1084 } 1085 /* 1086 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1087 * to the read pointer ? TX_GAP means to leave some space for what 1088 * the manual calls "too close". 1089 */ 1090 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1091 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1092 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1093 vcc->dev->number,size); 1094 return enq_next; 1095 } 1096 /* check DMA */ 1097 dma_wr = eni_in(MID_DMA_WR_TX); 1098 dma_rd = eni_in(MID_DMA_RD_TX); 1099 dma_size = 3; /* JK for descriptor and final fill, plus final size 1100 mis-alignment fix */ 1101 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1102 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1103 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1104 if (dma_size > TX_DMA_BUF) { 1105 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1106 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1107 } 1108 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1109 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1110 dma_size) { 1111 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1112 vcc->dev->number); 1113 return enq_jam; 1114 } 1115 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 1116 PCI_DMA_TODEVICE); 1117 ENI_PRV_PADDR(skb) = paddr; 1118 /* prepare DMA queue entries */ 1119 j = 0; 1120 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1121 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1122 MID_DT_JK; 1123 j++; 1124 if (!skb_shinfo(skb)->nr_frags) 1125 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1126 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1127 else { 1128 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1129 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1130 if (i == -1) 1131 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1132 skb->data, 1133 skb->len - skb->data_len); 1134 else 1135 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1136 skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset, 1137 skb_shinfo(skb)->frags[i].size); 1138 } 1139 if (skb->len & 3) 1140 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3)); 1141 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1142 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1143 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1144 MID_DMA_END | MID_DT_JK; 1145 j++; 1146 DPRINTK("DMA at end: %d\n",j); 1147 /* store frame */ 1148 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1149 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1150 (tx->resolution << MID_SEG_RATE_SHIFT) | 1151 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1152 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1153 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1154 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1155 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1156 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1157 DPRINTK("size: %d, len:%d\n",size,skb->len); 1158 if (aal5) 1159 writel(skb->len,tx->send+ 1160 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1161 j = j >> 1; 1162 for (i = 0; i < j; i++) { 1163 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1164 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1165 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1166 } 1167 ENI_PRV_POS(skb) = tx->tx_pos; 1168 ENI_PRV_SIZE(skb) = size; 1169 ENI_VCC(vcc)->txing += size; 1170 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1171 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1172 eni_out(dma_wr,MID_DMA_WR_TX); 1173 skb_queue_tail(&eni_dev->tx_queue,skb); 1174 queued++; 1175 return enq_ok; 1176 } 1177 1178 1179 static void poll_tx(struct atm_dev *dev) 1180 { 1181 struct eni_tx *tx; 1182 struct sk_buff *skb; 1183 enum enq_res res; 1184 int i; 1185 1186 DPRINTK(">poll_tx\n"); 1187 for (i = NR_CHAN-1; i >= 0; i--) { 1188 tx = &ENI_DEV(dev)->tx[i]; 1189 if (tx->send) 1190 while ((skb = skb_dequeue(&tx->backlog))) { 1191 res = do_tx(skb); 1192 if (res == enq_ok) continue; 1193 DPRINTK("re-queuing TX PDU\n"); 1194 skb_queue_head(&tx->backlog,skb); 1195 requeued++; 1196 if (res == enq_jam) return; 1197 break; 1198 } 1199 } 1200 } 1201 1202 1203 static void dequeue_tx(struct atm_dev *dev) 1204 { 1205 struct eni_dev *eni_dev; 1206 struct atm_vcc *vcc; 1207 struct sk_buff *skb; 1208 struct eni_tx *tx; 1209 1210 NULLCHECK(dev); 1211 eni_dev = ENI_DEV(dev); 1212 NULLCHECK(eni_dev); 1213 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1214 vcc = ATM_SKB(skb)->vcc; 1215 NULLCHECK(vcc); 1216 tx = ENI_VCC(vcc)->tx; 1217 NULLCHECK(ENI_VCC(vcc)->tx); 1218 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1219 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1220 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1221 eni_in(MID_TX_DESCRSTART(tx->index))) { 1222 skb_queue_head(&eni_dev->tx_queue,skb); 1223 break; 1224 } 1225 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1226 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 1227 PCI_DMA_TODEVICE); 1228 if (vcc->pop) vcc->pop(vcc,skb); 1229 else dev_kfree_skb_irq(skb); 1230 atomic_inc(&vcc->stats->tx); 1231 wake_up(&eni_dev->tx_wait); 1232 dma_complete++; 1233 } 1234 } 1235 1236 1237 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1238 { 1239 int i; 1240 1241 for (i = !ubr; i < NR_CHAN; i++) 1242 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1243 return NULL; 1244 } 1245 1246 1247 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1248 int *res,int unlimited) 1249 { 1250 static const int pre_div[] = { 4,16,128,2048 }; 1251 /* 2^(((x+2)^2-(x+2))/2+1) */ 1252 1253 if (unlimited) *pre = *res = 0; 1254 else { 1255 if (*pcr > 0) { 1256 int div; 1257 1258 for (*pre = 0; *pre < 3; (*pre)++) 1259 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1260 div = pre_div[*pre]**pcr; 1261 DPRINTK("min div %d\n",div); 1262 *res = TS_CLOCK/div-1; 1263 } 1264 else { 1265 int div; 1266 1267 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1268 for (*pre = 3; *pre >= 0; (*pre)--) 1269 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1270 if (*pre < 3) (*pre)++; /* else fail later */ 1271 div = pre_div[*pre]*-*pcr; 1272 DPRINTK("max div %d\n",div); 1273 *res = (TS_CLOCK+div-1)/div-1; 1274 } 1275 if (*res < 0) *res = 0; 1276 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1277 } 1278 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1279 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1280 return 0; 1281 } 1282 1283 1284 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1285 int set_rsv,int set_shp) 1286 { 1287 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1288 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1289 struct eni_tx *tx; 1290 unsigned long size; 1291 void __iomem *mem; 1292 int rate,ubr,unlimited,new_tx; 1293 int pre,res,order; 1294 int error; 1295 1296 rate = atm_pcr_goal(txtp); 1297 ubr = txtp->traffic_class == ATM_UBR; 1298 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1299 rate >= ATM_OC3_PCR); 1300 if (!unlimited) { 1301 size = txtp->max_sdu*eni_dev->tx_mult/100; 1302 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1303 MID_MAX_BUF_SIZE) 1304 size = MID_MAX_BUF_SIZE; 1305 } 1306 else { 1307 if (eni_dev->ubr) { 1308 eni_vcc->tx = eni_dev->ubr; 1309 txtp->pcr = ATM_OC3_PCR; 1310 return 0; 1311 } 1312 size = UBR_BUFFER; 1313 } 1314 new_tx = !eni_vcc->tx; 1315 mem = NULL; /* for gcc */ 1316 if (!new_tx) tx = eni_vcc->tx; 1317 else { 1318 mem = eni_alloc_mem(eni_dev,&size); 1319 if (!mem) return -ENOBUFS; 1320 tx = alloc_tx(eni_dev,unlimited); 1321 if (!tx) { 1322 eni_free_mem(eni_dev,mem,size); 1323 return -EBUSY; 1324 } 1325 DPRINTK("got chan %d\n",tx->index); 1326 tx->reserved = tx->shaping = 0; 1327 tx->send = mem; 1328 tx->words = size >> 2; 1329 skb_queue_head_init(&tx->backlog); 1330 for (order = 0; size > (1 << (order+10)); order++); 1331 eni_out((order << MID_SIZE_SHIFT) | 1332 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1333 MID_TX_PLACE(tx->index)); 1334 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1335 MID_DESCR_START; 1336 } 1337 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1338 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1339 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1340 txtp->max_pcr < rate) error = -EINVAL; 1341 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1342 error = -EINVAL; 1343 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1344 error = -EINVAL; 1345 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1346 error = -EINVAL; 1347 if (error) { 1348 if (new_tx) { 1349 tx->send = NULL; 1350 eni_free_mem(eni_dev,mem,size); 1351 } 1352 return error; 1353 } 1354 txtp->pcr = rate; 1355 if (set_rsv && !ubr) { 1356 eni_dev->tx_bw += tx->reserved; 1357 tx->reserved = rate; 1358 eni_dev->tx_bw -= rate; 1359 } 1360 if (set_shp || (unlimited && new_tx)) { 1361 if (unlimited && new_tx) eni_dev->ubr = tx; 1362 tx->prescaler = pre; 1363 tx->resolution = res; 1364 tx->shaping = rate; 1365 } 1366 if (set_shp) eni_vcc->tx = tx; 1367 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1368 return 0; 1369 } 1370 1371 1372 static int open_tx_first(struct atm_vcc *vcc) 1373 { 1374 ENI_VCC(vcc)->tx = NULL; 1375 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1376 ENI_VCC(vcc)->txing = 0; 1377 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1378 } 1379 1380 1381 static int open_tx_second(struct atm_vcc *vcc) 1382 { 1383 return 0; /* nothing to do */ 1384 } 1385 1386 1387 static void close_tx(struct atm_vcc *vcc) 1388 { 1389 DECLARE_WAITQUEUE(wait,current); 1390 struct eni_dev *eni_dev; 1391 struct eni_vcc *eni_vcc; 1392 1393 eni_vcc = ENI_VCC(vcc); 1394 if (!eni_vcc->tx) return; 1395 eni_dev = ENI_DEV(vcc->dev); 1396 /* wait for TX queue to drain */ 1397 DPRINTK("eni_close: waiting for TX ...\n"); 1398 add_wait_queue(&eni_dev->tx_wait,&wait); 1399 set_current_state(TASK_UNINTERRUPTIBLE); 1400 for (;;) { 1401 int txing; 1402 1403 tasklet_disable(&eni_dev->task); 1404 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1405 tasklet_enable(&eni_dev->task); 1406 if (!txing) break; 1407 DPRINTK("%d TX left\n",eni_vcc->txing); 1408 schedule(); 1409 set_current_state(TASK_UNINTERRUPTIBLE); 1410 } 1411 set_current_state(TASK_RUNNING); 1412 remove_wait_queue(&eni_dev->tx_wait,&wait); 1413 if (eni_vcc->tx != eni_dev->ubr) { 1414 /* 1415 * Looping a few times in here is probably far cheaper than 1416 * keeping track of TX completions all the time, so let's poll 1417 * a bit ... 1418 */ 1419 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1420 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1421 schedule(); 1422 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1423 eni_vcc->tx->send = NULL; 1424 eni_dev->tx_bw += eni_vcc->tx->reserved; 1425 } 1426 eni_vcc->tx = NULL; 1427 } 1428 1429 1430 static int start_tx(struct atm_dev *dev) 1431 { 1432 struct eni_dev *eni_dev; 1433 int i; 1434 1435 eni_dev = ENI_DEV(dev); 1436 eni_dev->lost = 0; 1437 eni_dev->tx_bw = ATM_OC3_PCR; 1438 eni_dev->tx_mult = DEFAULT_TX_MULT; 1439 init_waitqueue_head(&eni_dev->tx_wait); 1440 eni_dev->ubr = NULL; 1441 skb_queue_head_init(&eni_dev->tx_queue); 1442 eni_out(0,MID_DMA_WR_TX); 1443 for (i = 0; i < NR_CHAN; i++) { 1444 eni_dev->tx[i].send = NULL; 1445 eni_dev->tx[i].index = i; 1446 } 1447 return 0; 1448 } 1449 1450 1451 /*--------------------------------- common ----------------------------------*/ 1452 1453 1454 #if 0 /* may become useful again when tuning things */ 1455 1456 static void foo(void) 1457 { 1458 printk(KERN_INFO 1459 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1460 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1461 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1462 rx_enqueued,rx_dequeued,putting,pushed); 1463 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1464 } 1465 1466 #endif 1467 1468 1469 static void bug_int(struct atm_dev *dev,unsigned long reason) 1470 { 1471 struct eni_dev *eni_dev; 1472 1473 DPRINTK(">bug_int\n"); 1474 eni_dev = ENI_DEV(dev); 1475 if (reason & MID_DMA_ERR_ACK) 1476 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1477 "error\n",dev->number); 1478 if (reason & MID_TX_IDENT_MISM) 1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1480 "mismatch\n",dev->number); 1481 if (reason & MID_TX_DMA_OVFL) 1482 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1483 "overflow\n",dev->number); 1484 EVENT("---dump ends here---\n",0,0); 1485 printk(KERN_NOTICE "---recent events---\n"); 1486 event_dump(); 1487 } 1488 1489 1490 static irqreturn_t eni_int(int irq,void *dev_id) 1491 { 1492 struct atm_dev *dev; 1493 struct eni_dev *eni_dev; 1494 u32 reason; 1495 1496 DPRINTK(">eni_int\n"); 1497 dev = dev_id; 1498 eni_dev = ENI_DEV(dev); 1499 reason = eni_in(MID_ISA); 1500 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1501 /* 1502 * Must handle these two right now, because reading ISA doesn't clear 1503 * them, so they re-occur and we never make it to the tasklet. Since 1504 * they're rare, we don't mind the occasional invocation of eni_tasklet 1505 * with eni_dev->events == 0. 1506 */ 1507 if (reason & MID_STAT_OVFL) { 1508 EVENT("stat overflow\n",0,0); 1509 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1510 } 1511 if (reason & MID_SUNI_INT) { 1512 EVENT("SUNI int\n",0,0); 1513 dev->phy->interrupt(dev); 1514 #if 0 1515 foo(); 1516 #endif 1517 } 1518 spin_lock(&eni_dev->lock); 1519 eni_dev->events |= reason; 1520 spin_unlock(&eni_dev->lock); 1521 tasklet_schedule(&eni_dev->task); 1522 return IRQ_HANDLED; 1523 } 1524 1525 1526 static void eni_tasklet(unsigned long data) 1527 { 1528 struct atm_dev *dev = (struct atm_dev *) data; 1529 struct eni_dev *eni_dev = ENI_DEV(dev); 1530 unsigned long flags; 1531 u32 events; 1532 1533 DPRINTK("eni_tasklet (dev %p)\n",dev); 1534 spin_lock_irqsave(&eni_dev->lock,flags); 1535 events = xchg(&eni_dev->events,0); 1536 spin_unlock_irqrestore(&eni_dev->lock,flags); 1537 if (events & MID_RX_DMA_COMPLETE) { 1538 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1539 dequeue_rx(dev); 1540 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1541 poll_rx(dev); 1542 EVENT("poll_rx done\n",0,0); 1543 /* poll_tx ? */ 1544 } 1545 if (events & MID_SERVICE) { 1546 EVENT("INT: service, starting get_service\n",0,0); 1547 get_service(dev); 1548 EVENT("get_service done, starting poll_rx\n",0,0); 1549 poll_rx(dev); 1550 EVENT("poll_rx done\n",0,0); 1551 } 1552 if (events & MID_TX_DMA_COMPLETE) { 1553 EVENT("INT: TX DMA COMPLETE\n",0,0); 1554 dequeue_tx(dev); 1555 } 1556 if (events & MID_TX_COMPLETE) { 1557 EVENT("INT: TX COMPLETE\n",0,0); 1558 tx_complete++; 1559 wake_up(&eni_dev->tx_wait); 1560 /* poll_rx ? */ 1561 } 1562 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1563 EVENT("bug interrupt\n",0,0); 1564 bug_int(dev,events); 1565 } 1566 poll_tx(dev); 1567 } 1568 1569 1570 /*--------------------------------- entries ---------------------------------*/ 1571 1572 1573 static const char *media_name[] __devinitdata = { 1574 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1575 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1576 "TAXI","09?", "10?", "11?", /* 8-11 */ 1577 "12?", "13?", "14?", "15?", /* 12-15 */ 1578 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1579 "UTP", "21?", "22?", "23?", /* 20-23 */ 1580 "24?", "25?", "26?", "27?", /* 24-27 */ 1581 "28?", "29?", "30?", "31?" /* 28-31 */ 1582 }; 1583 1584 1585 #define SET_SEPROM \ 1586 ({ if (!error && !pci_error) { \ 1587 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1588 udelay(10); /* 10 usecs */ \ 1589 } }) 1590 #define GET_SEPROM \ 1591 ({ if (!error && !pci_error) { \ 1592 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1593 udelay(10); /* 10 usecs */ \ 1594 } }) 1595 1596 1597 static int __devinit get_esi_asic(struct atm_dev *dev) 1598 { 1599 struct eni_dev *eni_dev; 1600 unsigned char tonga; 1601 int error,failed,pci_error; 1602 int address,i,j; 1603 1604 eni_dev = ENI_DEV(dev); 1605 error = pci_error = 0; 1606 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1607 SET_SEPROM; 1608 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1609 /* start operation */ 1610 tonga |= SEPROM_DATA; 1611 SET_SEPROM; 1612 tonga |= SEPROM_CLK; 1613 SET_SEPROM; 1614 tonga &= ~SEPROM_DATA; 1615 SET_SEPROM; 1616 tonga &= ~SEPROM_CLK; 1617 SET_SEPROM; 1618 /* send address */ 1619 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1620 for (j = 7; j >= 0; j--) { 1621 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1622 tonga & ~SEPROM_DATA; 1623 SET_SEPROM; 1624 tonga |= SEPROM_CLK; 1625 SET_SEPROM; 1626 tonga &= ~SEPROM_CLK; 1627 SET_SEPROM; 1628 } 1629 /* get ack */ 1630 tonga |= SEPROM_DATA; 1631 SET_SEPROM; 1632 tonga |= SEPROM_CLK; 1633 SET_SEPROM; 1634 GET_SEPROM; 1635 failed = tonga & SEPROM_DATA; 1636 tonga &= ~SEPROM_CLK; 1637 SET_SEPROM; 1638 tonga |= SEPROM_DATA; 1639 SET_SEPROM; 1640 if (failed) error = -EIO; 1641 else { 1642 dev->esi[i] = 0; 1643 for (j = 7; j >= 0; j--) { 1644 dev->esi[i] <<= 1; 1645 tonga |= SEPROM_DATA; 1646 SET_SEPROM; 1647 tonga |= SEPROM_CLK; 1648 SET_SEPROM; 1649 GET_SEPROM; 1650 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1651 tonga &= ~SEPROM_CLK; 1652 SET_SEPROM; 1653 tonga |= SEPROM_DATA; 1654 SET_SEPROM; 1655 } 1656 /* get ack */ 1657 tonga |= SEPROM_DATA; 1658 SET_SEPROM; 1659 tonga |= SEPROM_CLK; 1660 SET_SEPROM; 1661 GET_SEPROM; 1662 if (!(tonga & SEPROM_DATA)) error = -EIO; 1663 tonga &= ~SEPROM_CLK; 1664 SET_SEPROM; 1665 tonga |= SEPROM_DATA; 1666 SET_SEPROM; 1667 } 1668 /* stop operation */ 1669 tonga &= ~SEPROM_DATA; 1670 SET_SEPROM; 1671 tonga |= SEPROM_CLK; 1672 SET_SEPROM; 1673 tonga |= SEPROM_DATA; 1674 SET_SEPROM; 1675 } 1676 if (pci_error) { 1677 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1678 "(0x%02x)\n",dev->number,pci_error); 1679 error = -EIO; 1680 } 1681 return error; 1682 } 1683 1684 1685 #undef SET_SEPROM 1686 #undef GET_SEPROM 1687 1688 1689 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1690 { 1691 void __iomem *mac_base; 1692 int i; 1693 1694 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1695 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1696 return 0; 1697 } 1698 1699 1700 static int __devinit eni_do_init(struct atm_dev *dev) 1701 { 1702 struct midway_eprom __iomem *eprom; 1703 struct eni_dev *eni_dev; 1704 struct pci_dev *pci_dev; 1705 unsigned long real_base; 1706 void __iomem *base; 1707 int error,i,last; 1708 1709 DPRINTK(">eni_init\n"); 1710 dev->ci_range.vpi_bits = 0; 1711 dev->ci_range.vci_bits = NR_VCI_LD; 1712 dev->link_rate = ATM_OC3_PCR; 1713 eni_dev = ENI_DEV(dev); 1714 pci_dev = eni_dev->pci_dev; 1715 real_base = pci_resource_start(pci_dev, 0); 1716 eni_dev->irq = pci_dev->irq; 1717 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1718 PCI_COMMAND_MEMORY | 1719 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1720 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1721 "(0x%02x)\n",dev->number,error); 1722 return -EIO; 1723 } 1724 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1725 dev->number,pci_dev->revision,real_base,eni_dev->irq); 1726 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 1727 printk("\n"); 1728 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1729 "mapping\n",dev->number); 1730 return error; 1731 } 1732 eni_dev->base_diff = real_base - (unsigned long) base; 1733 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1734 if (!eni_dev->asic) { 1735 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1736 if (readl(&eprom->magic) != ENI155_MAGIC) { 1737 printk("\n"); 1738 printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad " 1739 "magic - expected 0x%x, got 0x%x\n",dev->number, 1740 ENI155_MAGIC,(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) & DAUGTHER_ID]); 1781 1782 error = suni_init(dev); 1783 if (error) 1784 goto unmap; 1785 out: 1786 return error; 1787 unmap: 1788 iounmap(base); 1789 goto out; 1790 } 1791 1792 1793 static int __devinit eni_start(struct atm_dev *dev) 1794 { 1795 struct eni_dev *eni_dev; 1796 1797 void __iomem *buf; 1798 unsigned long buffer_mem; 1799 int error; 1800 1801 DPRINTK(">eni_start\n"); 1802 eni_dev = ENI_DEV(dev); 1803 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { 1804 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1805 dev->number,eni_dev->irq); 1806 error = -EAGAIN; 1807 goto out; 1808 } 1809 pci_set_master(eni_dev->pci_dev); 1810 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1811 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1812 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1813 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1814 "master (0x%02x)\n",dev->number,error); 1815 goto free_irq; 1816 } 1817 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1818 END_SWAP_DMA))) { 1819 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1820 "(0x%02x)\n",dev->number,error); 1821 goto free_irq; 1822 } 1823 /* determine addresses of internal tables */ 1824 eni_dev->vci = eni_dev->ram; 1825 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1826 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1827 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1828 buf = eni_dev->service+NR_SERVICE*4; 1829 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1830 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1831 eni_dev->service,buf); 1832 spin_lock_init(&eni_dev->lock); 1833 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1834 eni_dev->events = 0; 1835 /* initialize memory management */ 1836 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1837 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1838 eni_dev->free_list = kmalloc( 1839 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL); 1840 if (!eni_dev->free_list) { 1841 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1842 dev->number); 1843 error = -ENOMEM; 1844 goto free_irq; 1845 } 1846 eni_dev->free_len = 0; 1847 eni_put_free(eni_dev,buf,buffer_mem); 1848 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1849 /* 1850 * byte_addr free (k) 1851 * 0x00000000 512 VCI table 1852 * 0x00004000 496 RX DMA 1853 * 0x00005000 492 TX DMA 1854 * 0x00006000 488 service list 1855 * 0x00007000 484 buffers 1856 * 0x00080000 0 end (512kB) 1857 */ 1858 eni_out(0xffffffff,MID_IE); 1859 error = start_tx(dev); 1860 if (error) goto free_list; 1861 error = start_rx(dev); 1862 if (error) goto free_list; 1863 error = dev->phy->start(dev); 1864 if (error) goto free_list; 1865 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1866 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1867 MID_MC_S); 1868 /* Tonga uses SBus INTReq1 */ 1869 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1870 return 0; 1871 1872 free_list: 1873 kfree(eni_dev->free_list); 1874 1875 free_irq: 1876 free_irq(eni_dev->irq, eni_dev); 1877 1878 out: 1879 return error; 1880 } 1881 1882 1883 static void eni_close(struct atm_vcc *vcc) 1884 { 1885 DPRINTK(">eni_close\n"); 1886 if (!ENI_VCC(vcc)) return; 1887 clear_bit(ATM_VF_READY,&vcc->flags); 1888 close_rx(vcc); 1889 close_tx(vcc); 1890 DPRINTK("eni_close: done waiting\n"); 1891 /* deallocate memory */ 1892 kfree(ENI_VCC(vcc)); 1893 vcc->dev_data = NULL; 1894 clear_bit(ATM_VF_ADDR,&vcc->flags); 1895 /*foo();*/ 1896 } 1897 1898 1899 static int eni_open(struct atm_vcc *vcc) 1900 { 1901 struct eni_dev *eni_dev; 1902 struct eni_vcc *eni_vcc; 1903 int error; 1904 short vpi = vcc->vpi; 1905 int vci = vcc->vci; 1906 1907 DPRINTK(">eni_open\n"); 1908 EVENT("eni_open\n",0,0); 1909 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1910 vcc->dev_data = NULL; 1911 eni_dev = ENI_DEV(vcc->dev); 1912 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1913 set_bit(ATM_VF_ADDR,&vcc->flags); 1914 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1915 return -EINVAL; 1916 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1917 vcc->vci); 1918 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1919 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1920 if (!eni_vcc) return -ENOMEM; 1921 vcc->dev_data = eni_vcc; 1922 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1923 if ((error = open_rx_first(vcc))) { 1924 eni_close(vcc); 1925 return error; 1926 } 1927 if ((error = open_tx_first(vcc))) { 1928 eni_close(vcc); 1929 return error; 1930 } 1931 } 1932 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1933 if ((error = open_rx_second(vcc))) { 1934 eni_close(vcc); 1935 return error; 1936 } 1937 if ((error = open_tx_second(vcc))) { 1938 eni_close(vcc); 1939 return error; 1940 } 1941 set_bit(ATM_VF_READY,&vcc->flags); 1942 /* should power down SUNI while !ref_count @@@ */ 1943 return 0; 1944 } 1945 1946 1947 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1948 { 1949 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1950 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1951 struct sk_buff *skb; 1952 int error,rate,rsv,shp; 1953 1954 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1955 if (tx == eni_dev->ubr) return -EBADFD; 1956 rate = atm_pcr_goal(&qos->txtp); 1957 if (rate < 0) rate = -rate; 1958 rsv = shp = 0; 1959 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1960 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1961 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1962 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1963 if (!rsv && !shp) return 0; 1964 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1965 if (error) return error; 1966 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1967 /* 1968 * Walk through the send buffer and patch the rate information in all 1969 * segmentation buffer descriptors of this VCC. 1970 */ 1971 tasklet_disable(&eni_dev->task); 1972 skb_queue_walk(&eni_dev->tx_queue, skb) { 1973 void __iomem *dsc; 1974 1975 if (ATM_SKB(skb)->vcc != vcc) continue; 1976 dsc = tx->send+ENI_PRV_POS(skb)*4; 1977 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1978 (tx->prescaler << MID_SEG_PR_SHIFT) | 1979 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1980 } 1981 tasklet_enable(&eni_dev->task); 1982 return 0; 1983 } 1984 1985 1986 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1987 { 1988 struct eni_dev *eni_dev = ENI_DEV(dev); 1989 1990 if (cmd == ENI_MEMDUMP) { 1991 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1992 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 1993 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 1994 dump(dev); 1995 return 0; 1996 } 1997 if (cmd == ENI_SETMULT) { 1998 struct eni_multipliers mult; 1999 2000 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2001 if (copy_from_user(&mult, arg, 2002 sizeof(struct eni_multipliers))) 2003 return -EFAULT; 2004 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2005 mult.tx > 65536 || mult.rx > 65536) 2006 return -EINVAL; 2007 if (mult.tx) eni_dev->tx_mult = mult.tx; 2008 if (mult.rx) eni_dev->rx_mult = mult.rx; 2009 return 0; 2010 } 2011 if (cmd == ATM_SETCIRANGE) { 2012 struct atm_cirange ci; 2013 2014 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2015 return -EFAULT; 2016 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2017 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2018 return 0; 2019 return -EINVAL; 2020 } 2021 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2022 return dev->phy->ioctl(dev,cmd,arg); 2023 } 2024 2025 2026 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2027 void __user *optval,int optlen) 2028 { 2029 return -EINVAL; 2030 } 2031 2032 2033 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2034 void __user *optval,int optlen) 2035 { 2036 return -EINVAL; 2037 } 2038 2039 2040 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2041 { 2042 enum enq_res res; 2043 2044 DPRINTK(">eni_send\n"); 2045 if (!ENI_VCC(vcc)->tx) { 2046 if (vcc->pop) vcc->pop(vcc,skb); 2047 else dev_kfree_skb(skb); 2048 return -EINVAL; 2049 } 2050 if (!skb) { 2051 printk(KERN_CRIT "!skb in eni_send ?\n"); 2052 if (vcc->pop) vcc->pop(vcc,skb); 2053 return -EINVAL; 2054 } 2055 if (vcc->qos.aal == ATM_AAL0) { 2056 if (skb->len != ATM_CELL_SIZE-1) { 2057 if (vcc->pop) vcc->pop(vcc,skb); 2058 else dev_kfree_skb(skb); 2059 return -EINVAL; 2060 } 2061 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2062 } 2063 submitted++; 2064 ATM_SKB(skb)->vcc = vcc; 2065 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2066 res = do_tx(skb); 2067 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2068 if (res == enq_ok) return 0; 2069 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2070 backlogged++; 2071 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2072 return 0; 2073 } 2074 2075 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2076 unsigned long addr) 2077 { 2078 writel(value,ENI_DEV(dev)->phy+addr*4); 2079 } 2080 2081 2082 2083 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2084 { 2085 return readl(ENI_DEV(dev)->phy+addr*4); 2086 } 2087 2088 2089 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2090 { 2091 struct hlist_node *node; 2092 struct sock *s; 2093 static const char *signal[] = { "LOST","unknown","okay" }; 2094 struct eni_dev *eni_dev = ENI_DEV(dev); 2095 struct atm_vcc *vcc; 2096 int left,i; 2097 2098 left = *pos; 2099 if (!left) 2100 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2101 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2102 eni_dev->mem >> 10,eni_dev->tx_bw); 2103 if (!--left) 2104 return sprintf(page,"%4sBursts: TX" 2105 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2106 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2107 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2108 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2109 " none" 2110 #endif 2111 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2112 " 16W" 2113 #endif 2114 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2115 " 8W" 2116 #endif 2117 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2118 " 4W" 2119 #endif 2120 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2121 " 2W" 2122 #endif 2123 ", RX" 2124 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2125 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2126 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2127 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2128 " none" 2129 #endif 2130 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2131 " 16W" 2132 #endif 2133 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2134 " 8W" 2135 #endif 2136 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2137 " 4W" 2138 #endif 2139 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2140 " 2W" 2141 #endif 2142 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2143 " (default)" 2144 #endif 2145 "\n",""); 2146 if (!--left) 2147 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2148 "",eni_dev->tx_mult,eni_dev->rx_mult); 2149 for (i = 0; i < NR_CHAN; i++) { 2150 struct eni_tx *tx = eni_dev->tx+i; 2151 2152 if (!tx->send) continue; 2153 if (!--left) { 2154 return sprintf(page,"tx[%d]: 0x%ld-0x%ld " 2155 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2156 (unsigned long) (tx->send - eni_dev->ram), 2157 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2158 tx->reserved,tx->shaping, 2159 tx == eni_dev->ubr ? " (UBR)" : ""); 2160 } 2161 if (--left) continue; 2162 return sprintf(page,"%10sbacklog %u packets\n","", 2163 skb_queue_len(&tx->backlog)); 2164 } 2165 read_lock(&vcc_sklist_lock); 2166 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2167 struct hlist_head *head = &vcc_hash[i]; 2168 2169 sk_for_each(s, node, head) { 2170 struct eni_vcc *eni_vcc; 2171 int length; 2172 2173 vcc = atm_sk(s); 2174 if (vcc->dev != dev) 2175 continue; 2176 eni_vcc = ENI_VCC(vcc); 2177 if (--left) continue; 2178 length = sprintf(page,"vcc %4d: ",vcc->vci); 2179 if (eni_vcc->rx) { 2180 length += sprintf(page+length,"0x%ld-0x%ld " 2181 "(%6ld bytes)", 2182 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2183 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2184 eni_vcc->words*4); 2185 if (eni_vcc->tx) length += sprintf(page+length,", "); 2186 } 2187 if (eni_vcc->tx) 2188 length += sprintf(page+length,"tx[%d], txing %d bytes", 2189 eni_vcc->tx->index,eni_vcc->txing); 2190 page[length] = '\n'; 2191 read_unlock(&vcc_sklist_lock); 2192 return length+1; 2193 } 2194 } 2195 read_unlock(&vcc_sklist_lock); 2196 for (i = 0; i < eni_dev->free_len; i++) { 2197 struct eni_free *fe = eni_dev->free_list+i; 2198 unsigned long offset; 2199 2200 if (--left) continue; 2201 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2202 return sprintf(page,"free %p-%p (%6d bytes)\n", 2203 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2204 1 << fe->order); 2205 } 2206 return 0; 2207 } 2208 2209 2210 static const struct atmdev_ops ops = { 2211 .open = eni_open, 2212 .close = eni_close, 2213 .ioctl = eni_ioctl, 2214 .getsockopt = eni_getsockopt, 2215 .setsockopt = eni_setsockopt, 2216 .send = eni_send, 2217 .phy_put = eni_phy_put, 2218 .phy_get = eni_phy_get, 2219 .change_qos = eni_change_qos, 2220 .proc_read = eni_proc_read 2221 }; 2222 2223 2224 static int __devinit eni_init_one(struct pci_dev *pci_dev, 2225 const struct pci_device_id *ent) 2226 { 2227 struct atm_dev *dev; 2228 struct eni_dev *eni_dev; 2229 int error = -ENOMEM; 2230 2231 DPRINTK("eni_init_one\n"); 2232 2233 if (pci_enable_device(pci_dev)) { 2234 error = -EIO; 2235 goto out0; 2236 } 2237 2238 eni_dev = kmalloc(sizeof(struct eni_dev),GFP_KERNEL); 2239 if (!eni_dev) goto out0; 2240 if (!cpu_zeroes) { 2241 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE, 2242 &zeroes); 2243 if (!cpu_zeroes) goto out1; 2244 } 2245 dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL); 2246 if (!dev) goto out2; 2247 pci_set_drvdata(pci_dev, dev); 2248 eni_dev->pci_dev = pci_dev; 2249 dev->dev_data = eni_dev; 2250 eni_dev->asic = ent->driver_data; 2251 error = eni_do_init(dev); 2252 if (error) goto out3; 2253 error = eni_start(dev); 2254 if (error) goto out3; 2255 eni_dev->more = eni_boards; 2256 eni_boards = dev; 2257 return 0; 2258 out3: 2259 atm_dev_deregister(dev); 2260 out2: 2261 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes); 2262 cpu_zeroes = NULL; 2263 out1: 2264 kfree(eni_dev); 2265 out0: 2266 return error; 2267 } 2268 2269 2270 static struct pci_device_id eni_pci_tbl[] = { 2271 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID, 2272 0, 0, 0 /* FPGA */ }, 2273 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID, 2274 0, 0, 1 /* ASIC */ }, 2275 { 0, } 2276 }; 2277 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2278 2279 2280 static void __devexit eni_remove_one(struct pci_dev *pci_dev) 2281 { 2282 /* grrr */ 2283 } 2284 2285 2286 static struct pci_driver eni_driver = { 2287 .name = DEV_LABEL, 2288 .id_table = eni_pci_tbl, 2289 .probe = eni_init_one, 2290 .remove = __devexit_p(eni_remove_one), 2291 }; 2292 2293 2294 static int __init eni_init(void) 2295 { 2296 struct sk_buff *skb; /* dummy for sizeof */ 2297 2298 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) { 2299 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n", 2300 sizeof(skb->cb),sizeof(struct eni_skb_prv)); 2301 return -EIO; 2302 } 2303 return pci_register_driver(&eni_driver); 2304 } 2305 2306 2307 module_init(eni_init); 2308 /* @@@ since exit routine not defined, this module can not be unloaded */ 2309 2310 MODULE_LICENSE("GPL"); 2311