1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ 2 3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 4 5 6 #include <linux/module.h> 7 #include <linux/kernel.h> 8 #include <linux/mm.h> 9 #include <linux/pci.h> 10 #include <linux/errno.h> 11 #include <linux/atm.h> 12 #include <linux/atmdev.h> 13 #include <linux/sonet.h> 14 #include <linux/skbuff.h> 15 #include <linux/time.h> 16 #include <linux/delay.h> 17 #include <linux/uio.h> 18 #include <linux/init.h> 19 #include <linux/atm_eni.h> 20 #include <linux/bitops.h> 21 #include <linux/slab.h> 22 #include <asm/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 */ 63 64 65 #if 0 66 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 67 #else 68 #define DPRINTK(format,args...) 69 #endif 70 71 72 #ifndef CONFIG_ATM_ENI_TUNE_BURST 73 #define CONFIG_ATM_ENI_BURST_TX_8W 74 #define CONFIG_ATM_ENI_BURST_RX_4W 75 #endif 76 77 78 #ifndef CONFIG_ATM_ENI_DEBUG 79 80 81 #define NULLCHECK(x) 82 83 #define EVENT(s,a,b) 84 85 86 static void event_dump(void) 87 { 88 } 89 90 91 #else 92 93 94 /* 95 * NULL pointer checking 96 */ 97 98 #define NULLCHECK(x) \ 99 if ((unsigned long) (x) < 0x30) \ 100 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 101 102 /* 103 * Very extensive activity logging. Greatly improves bug detection speed but 104 * costs a few Mbps if enabled. 105 */ 106 107 #define EV 64 108 109 static const char *ev[EV]; 110 static unsigned long ev_a[EV],ev_b[EV]; 111 static int ec = 0; 112 113 114 static void EVENT(const char *s,unsigned long a,unsigned long b) 115 { 116 ev[ec] = s; 117 ev_a[ec] = a; 118 ev_b[ec] = b; 119 ec = (ec+1) % EV; 120 } 121 122 123 static void event_dump(void) 124 { 125 int n,i; 126 127 for (n = 0; n < EV; n++) { 128 i = (ec+n) % EV; 129 printk(KERN_NOTICE); 130 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 131 } 132 } 133 134 135 #endif /* CONFIG_ATM_ENI_DEBUG */ 136 137 138 /* 139 * NExx must not be equal at end 140 * EExx may be equal at end 141 * xxPJOK verify validity of pointer jumps 142 * xxPMOK operating on a circular buffer of "c" words 143 */ 144 145 #define NEPJOK(a0,a1,b) \ 146 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 147 #define EEPJOK(a0,a1,b) \ 148 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 149 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 150 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 151 152 153 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 154 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 155 putting = 0; 156 157 static struct atm_dev *eni_boards = NULL; 158 159 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */ 160 static dma_addr_t zeroes; 161 162 /* Read/write registers on card */ 163 #define eni_in(r) readl(eni_dev->reg+(r)*4) 164 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) 165 166 167 /*-------------------------------- utilities --------------------------------*/ 168 169 170 static void dump_mem(struct eni_dev *eni_dev) 171 { 172 int i; 173 174 for (i = 0; i < eni_dev->free_len; i++) 175 printk(KERN_DEBUG " %d: %p %d\n",i, 176 eni_dev->free_list[i].start, 177 1 << eni_dev->free_list[i].order); 178 } 179 180 181 static void dump(struct atm_dev *dev) 182 { 183 struct eni_dev *eni_dev; 184 185 int i; 186 187 eni_dev = ENI_DEV(dev); 188 printk(KERN_NOTICE "Free memory\n"); 189 dump_mem(eni_dev); 190 printk(KERN_NOTICE "TX buffers\n"); 191 for (i = 0; i < NR_CHAN; i++) 192 if (eni_dev->tx[i].send) 193 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, 194 eni_dev->tx[i].send,eni_dev->tx[i].words*4); 195 printk(KERN_NOTICE "RX buffers\n"); 196 for (i = 0; i < 1024; i++) 197 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) 198 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, 199 ENI_VCC(eni_dev->rx_map[i])->recv, 200 ENI_VCC(eni_dev->rx_map[i])->words*4); 201 printk(KERN_NOTICE "----\n"); 202 } 203 204 205 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, 206 unsigned long size) 207 { 208 struct eni_free *list; 209 int len,order; 210 211 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); 212 start += eni_dev->base_diff; 213 list = eni_dev->free_list; 214 len = eni_dev->free_len; 215 while (size) { 216 if (len >= eni_dev->free_list_size) { 217 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", 218 start,size); 219 break; 220 } 221 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); 222 if (MID_MIN_BUF_SIZE > (1 << order)) { 223 printk(KERN_CRIT "eni_put_free: order %d too small\n", 224 order); 225 break; 226 } 227 list[len].start = (void __iomem *) start; 228 list[len].order = order; 229 len++; 230 start += 1 << order; 231 size -= 1 << order; 232 } 233 eni_dev->free_len = len; 234 /*dump_mem(eni_dev);*/ 235 } 236 237 238 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) 239 { 240 struct eni_free *list; 241 void __iomem *start; 242 int len,i,order,best_order,index; 243 244 list = eni_dev->free_list; 245 len = eni_dev->free_len; 246 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; 247 if (*size > MID_MAX_BUF_SIZE) return NULL; 248 for (order = 0; (1 << order) < *size; order++); 249 DPRINTK("trying: %ld->%d\n",*size,order); 250 best_order = 65; /* we don't have more than 2^64 of anything ... */ 251 index = 0; /* silence GCC */ 252 for (i = 0; i < len; i++) 253 if (list[i].order == order) { 254 best_order = order; 255 index = i; 256 break; 257 } 258 else if (best_order > list[i].order && list[i].order > order) { 259 best_order = list[i].order; 260 index = i; 261 } 262 if (best_order == 65) return NULL; 263 start = list[index].start-eni_dev->base_diff; 264 list[index] = list[--len]; 265 eni_dev->free_len = len; 266 *size = 1 << order; 267 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 268 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 269 memset_io(start,0,*size); /* never leak data */ 270 /*dump_mem(eni_dev);*/ 271 return start; 272 } 273 274 275 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 276 unsigned long size) 277 { 278 struct eni_free *list; 279 int len,i,order; 280 281 start += eni_dev->base_diff; 282 list = eni_dev->free_list; 283 len = eni_dev->free_len; 284 for (order = -1; size; order++) size >>= 1; 285 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 286 for (i = 0; i < len; i++) 287 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 288 list[i].order == order) { 289 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 290 list[i].start,start,1 << order,list[i].order,order); 291 list[i] = list[--len]; 292 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 293 order++; 294 i = -1; 295 continue; 296 } 297 if (len >= eni_dev->free_list_size) { 298 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 299 order); 300 return; 301 } 302 list[len].start = start; 303 list[len].order = order; 304 eni_dev->free_len = len+1; 305 /*dump_mem(eni_dev);*/ 306 } 307 308 309 /*----------------------------------- RX ------------------------------------*/ 310 311 312 #define ENI_VCC_NOS ((struct atm_vcc *) 1) 313 314 315 static void rx_ident_err(struct atm_vcc *vcc) 316 { 317 struct atm_dev *dev; 318 struct eni_dev *eni_dev; 319 struct eni_vcc *eni_vcc; 320 321 dev = vcc->dev; 322 eni_dev = ENI_DEV(dev); 323 /* immediately halt adapter */ 324 eni_out(eni_in(MID_MC_S) & 325 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 326 /* dump useful information */ 327 eni_vcc = ENI_VCC(vcc); 328 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 329 "mismatch\n",dev->number); 330 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 331 eni_vcc->rxing,eni_vcc->words); 332 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 333 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 334 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 335 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 336 eni_vcc->servicing); 337 EVENT("---dump ends here---\n",0,0); 338 printk(KERN_NOTICE "---recent events---\n"); 339 event_dump(); 340 ENI_DEV(dev)->fast = NULL; /* really stop it */ 341 ENI_DEV(dev)->slow = NULL; 342 skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 343 } 344 345 346 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 347 unsigned long skip,unsigned long size,unsigned long eff) 348 { 349 struct eni_dev *eni_dev; 350 struct eni_vcc *eni_vcc; 351 u32 dma_rd,dma_wr; 352 u32 dma[RX_DMA_BUF*2]; 353 dma_addr_t paddr; 354 unsigned long here; 355 int i,j; 356 357 eni_dev = ENI_DEV(vcc->dev); 358 eni_vcc = ENI_VCC(vcc); 359 paddr = 0; /* GCC, shut up */ 360 if (skb) { 361 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 362 PCI_DMA_FROMDEVICE); 363 ENI_PRV_PADDR(skb) = paddr; 364 if (paddr & 3) 365 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 366 "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 367 vcc->vci,(unsigned long) paddr); 368 ENI_PRV_SIZE(skb) = size+skip; 369 /* PDU plus descriptor */ 370 ATM_SKB(skb)->vcc = vcc; 371 } 372 j = 0; 373 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 374 here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 375 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 376 << MID_DMA_VCI_SHIFT) | MID_DT_JK; 377 j++; 378 } 379 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 380 if (!eff) size += skip; 381 else { 382 unsigned long words; 383 384 if (!size) { 385 DPRINTK("strange things happen ...\n"); 386 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 387 size,eff); 388 } 389 words = eff; 390 if (paddr & 15) { 391 unsigned long init; 392 393 init = 4-((paddr & 15) >> 2); 394 if (init > words) init = words; 395 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 396 (vcc->vci << MID_DMA_VCI_SHIFT); 397 dma[j++] = paddr; 398 paddr += init << 2; 399 words -= init; 400 } 401 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 402 if (words & ~15) { 403 dma[j++] = MID_DT_16W | ((words >> 4) << 404 MID_DMA_COUNT_SHIFT) | (vcc->vci << 405 MID_DMA_VCI_SHIFT); 406 dma[j++] = paddr; 407 paddr += (words & ~15) << 2; 408 words &= 15; 409 } 410 #endif 411 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 412 if (words & ~7) { 413 dma[j++] = MID_DT_8W | ((words >> 3) << 414 MID_DMA_COUNT_SHIFT) | (vcc->vci << 415 MID_DMA_VCI_SHIFT); 416 dma[j++] = paddr; 417 paddr += (words & ~7) << 2; 418 words &= 7; 419 } 420 #endif 421 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 422 if (words & ~3) { 423 dma[j++] = MID_DT_4W | ((words >> 2) << 424 MID_DMA_COUNT_SHIFT) | (vcc->vci << 425 MID_DMA_VCI_SHIFT); 426 dma[j++] = paddr; 427 paddr += (words & ~3) << 2; 428 words &= 3; 429 } 430 #endif 431 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 432 if (words & ~1) { 433 dma[j++] = MID_DT_2W | ((words >> 1) << 434 MID_DMA_COUNT_SHIFT) | (vcc->vci << 435 MID_DMA_VCI_SHIFT); 436 dma[j++] = paddr; 437 paddr += (words & ~1) << 2; 438 words &= 1; 439 } 440 #endif 441 if (words) { 442 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 443 | (vcc->vci << MID_DMA_VCI_SHIFT); 444 dma[j++] = paddr; 445 } 446 } 447 if (size != eff) { 448 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 449 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 450 j++; 451 } 452 if (!j || j > 2*RX_DMA_BUF) { 453 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 454 goto trouble; 455 } 456 dma[j-2] |= MID_DMA_END; 457 j = j >> 1; 458 dma_wr = eni_in(MID_DMA_WR_RX); 459 dma_rd = eni_in(MID_DMA_RD_RX); 460 /* 461 * Can I move the dma_wr pointer by 2j+1 positions without overwriting 462 * data that hasn't been read (position of dma_rd) yet ? 463 */ 464 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 465 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 466 vcc->dev->number); 467 goto trouble; 468 } 469 for (i = 0; i < j; i++) { 470 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 471 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 472 dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 473 } 474 if (skb) { 475 ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 476 skb_queue_tail(&eni_dev->rx_queue,skb); 477 eni_vcc->last = skb; 478 rx_enqueued++; 479 } 480 eni_vcc->descr = here; 481 eni_out(dma_wr,MID_DMA_WR_RX); 482 return 0; 483 484 trouble: 485 if (paddr) 486 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len, 487 PCI_DMA_FROMDEVICE); 488 if (skb) dev_kfree_skb_irq(skb); 489 return -1; 490 } 491 492 493 static void discard(struct atm_vcc *vcc,unsigned long size) 494 { 495 struct eni_vcc *eni_vcc; 496 497 eni_vcc = ENI_VCC(vcc); 498 EVENT("discard (size=%ld)\n",size,0); 499 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); 500 /* could do a full fallback, but that might be more expensive */ 501 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; 502 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); 503 } 504 505 506 /* 507 * TODO: should check whether direct copies (without DMA setup, dequeuing on 508 * interrupt, etc.) aren't much faster for AAL0 509 */ 510 511 static int rx_aal0(struct atm_vcc *vcc) 512 { 513 struct eni_vcc *eni_vcc; 514 unsigned long descr; 515 unsigned long length; 516 struct sk_buff *skb; 517 518 DPRINTK(">rx_aal0\n"); 519 eni_vcc = ENI_VCC(vcc); 520 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 521 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 522 rx_ident_err(vcc); 523 return 1; 524 } 525 if (descr & MID_RED_T) { 526 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 527 vcc->dev->number); 528 length = 0; 529 atomic_inc(&vcc->stats->rx_err); 530 } 531 else { 532 length = ATM_CELL_SIZE-1; /* no HEC */ 533 } 534 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; 535 if (!skb) { 536 discard(vcc,length >> 2); 537 return 0; 538 } 539 skb_put(skb,length); 540 skb->tstamp = eni_vcc->timestamp; 541 DPRINTK("got len %ld\n",length); 542 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; 543 eni_vcc->rxing++; 544 return 0; 545 } 546 547 548 static int rx_aal5(struct atm_vcc *vcc) 549 { 550 struct eni_vcc *eni_vcc; 551 unsigned long descr; 552 unsigned long size,eff,length; 553 struct sk_buff *skb; 554 555 EVENT("rx_aal5\n",0,0); 556 DPRINTK(">rx_aal5\n"); 557 eni_vcc = ENI_VCC(vcc); 558 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 559 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 560 rx_ident_err(vcc); 561 return 1; 562 } 563 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { 564 if (descr & MID_RED_T) { 565 EVENT("empty cell (descr=0x%lx)\n",descr,0); 566 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 567 vcc->dev->number); 568 size = 0; 569 } 570 else { 571 static unsigned long silence = 0; 572 573 if (time_after(jiffies, silence) || silence == 0) { 574 printk(KERN_WARNING DEV_LABEL "(itf %d): " 575 "discarding PDU(s) with CRC error\n", 576 vcc->dev->number); 577 silence = (jiffies+2*HZ)|1; 578 } 579 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 580 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, 581 size); 582 } 583 eff = length = 0; 584 atomic_inc(&vcc->stats->rx_err); 585 } 586 else { 587 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 588 DPRINTK("size=%ld\n",size); 589 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & 590 (eni_vcc->words-1)))*4) & 0xffff; 591 /* -trailer(2)+header(1) */ 592 if (length && length <= (size << 2)-8 && length <= 593 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; 594 else { /* ^ trailer length (8) */ 595 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, 596 length); 597 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " 598 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", 599 vcc->dev->number,vcc->vci,length,size << 2,descr); 600 length = eff = 0; 601 atomic_inc(&vcc->stats->rx_err); 602 } 603 } 604 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; 605 if (!skb) { 606 discard(vcc,size); 607 return 0; 608 } 609 skb_put(skb,length); 610 DPRINTK("got len %ld\n",length); 611 if (do_rx_dma(vcc,skb,1,size,eff)) return 1; 612 eni_vcc->rxing++; 613 return 0; 614 } 615 616 617 static inline int rx_vcc(struct atm_vcc *vcc) 618 { 619 void __iomem *vci_dsc; 620 unsigned long tmp; 621 struct eni_vcc *eni_vcc; 622 623 eni_vcc = ENI_VCC(vcc); 624 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; 625 EVENT("rx_vcc(1)\n",0,0); 626 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> 627 MID_VCI_DESCR_SHIFT)) { 628 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", 629 eni_vcc->descr,tmp); 630 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 631 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 632 MID_VCI_DESCR_SHIFT)); 633 if (ENI_VCC(vcc)->rx(vcc)) return 1; 634 } 635 /* clear IN_SERVICE flag */ 636 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); 637 /* 638 * If new data has arrived between evaluating the while condition and 639 * clearing IN_SERVICE, we wouldn't be notified until additional data 640 * follows. So we have to loop again to be sure. 641 */ 642 EVENT("rx_vcc(3)\n",0,0); 643 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) 644 >> MID_VCI_DESCR_SHIFT)) { 645 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", 646 eni_vcc->descr,tmp); 647 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 648 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 649 MID_VCI_DESCR_SHIFT)); 650 if (ENI_VCC(vcc)->rx(vcc)) return 1; 651 } 652 return 0; 653 } 654 655 656 static void poll_rx(struct atm_dev *dev) 657 { 658 struct eni_dev *eni_dev; 659 struct atm_vcc *curr; 660 661 eni_dev = ENI_DEV(dev); 662 while ((curr = eni_dev->fast)) { 663 EVENT("poll_rx.fast\n",0,0); 664 if (rx_vcc(curr)) return; 665 eni_dev->fast = ENI_VCC(curr)->next; 666 ENI_VCC(curr)->next = ENI_VCC_NOS; 667 barrier(); 668 ENI_VCC(curr)->servicing--; 669 } 670 while ((curr = eni_dev->slow)) { 671 EVENT("poll_rx.slow\n",0,0); 672 if (rx_vcc(curr)) return; 673 eni_dev->slow = ENI_VCC(curr)->next; 674 ENI_VCC(curr)->next = ENI_VCC_NOS; 675 barrier(); 676 ENI_VCC(curr)->servicing--; 677 } 678 } 679 680 681 static void get_service(struct atm_dev *dev) 682 { 683 struct eni_dev *eni_dev; 684 struct atm_vcc *vcc; 685 unsigned long vci; 686 687 DPRINTK(">get_service\n"); 688 eni_dev = ENI_DEV(dev); 689 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { 690 vci = readl(eni_dev->service+eni_dev->serv_read*4); 691 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); 692 vcc = eni_dev->rx_map[vci & 1023]; 693 if (!vcc) { 694 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " 695 "found\n",dev->number,vci); 696 continue; /* nasty but we try to go on anyway */ 697 /* @@@ nope, doesn't work */ 698 } 699 EVENT("getting from service\n",0,0); 700 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { 701 EVENT("double service\n",0,0); 702 DPRINTK("Grr, servicing VCC %ld twice\n",vci); 703 continue; 704 } 705 ENI_VCC(vcc)->timestamp = ktime_get_real(); 706 ENI_VCC(vcc)->next = NULL; 707 if (vcc->qos.rxtp.traffic_class == ATM_CBR) { 708 if (eni_dev->fast) 709 ENI_VCC(eni_dev->last_fast)->next = vcc; 710 else eni_dev->fast = vcc; 711 eni_dev->last_fast = vcc; 712 } 713 else { 714 if (eni_dev->slow) 715 ENI_VCC(eni_dev->last_slow)->next = vcc; 716 else eni_dev->slow = vcc; 717 eni_dev->last_slow = vcc; 718 } 719 putting++; 720 ENI_VCC(vcc)->servicing++; 721 } 722 } 723 724 725 static void dequeue_rx(struct atm_dev *dev) 726 { 727 struct eni_dev *eni_dev; 728 struct eni_vcc *eni_vcc; 729 struct atm_vcc *vcc; 730 struct sk_buff *skb; 731 void __iomem *vci_dsc; 732 int first; 733 734 eni_dev = ENI_DEV(dev); 735 first = 1; 736 while (1) { 737 skb = skb_dequeue(&eni_dev->rx_queue); 738 if (!skb) { 739 if (first) { 740 DPRINTK(DEV_LABEL "(itf %d): RX but not " 741 "rxing\n",dev->number); 742 EVENT("nothing to dequeue\n",0,0); 743 } 744 break; 745 } 746 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), 747 ENI_PRV_POS(skb)); 748 rx_dequeued++; 749 vcc = ATM_SKB(skb)->vcc; 750 eni_vcc = ENI_VCC(vcc); 751 first = 0; 752 vci_dsc = eni_dev->vci+vcc->vci*16; 753 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), 754 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, 755 eni_vcc->words)) { 756 EVENT("requeuing\n",0,0); 757 skb_queue_head(&eni_dev->rx_queue,skb); 758 break; 759 } 760 eni_vcc->rxing--; 761 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); 762 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 763 PCI_DMA_TODEVICE); 764 if (!skb->len) dev_kfree_skb_irq(skb); 765 else { 766 EVENT("pushing (len=%ld)\n",skb->len,0); 767 if (vcc->qos.aal == ATM_AAL0) 768 *(unsigned long *) skb->data = 769 ntohl(*(unsigned long *) skb->data); 770 memset(skb->cb,0,sizeof(struct eni_skb_prv)); 771 vcc->push(vcc,skb); 772 pushed++; 773 } 774 atomic_inc(&vcc->stats->rx); 775 } 776 wake_up(&eni_dev->rx_wait); 777 } 778 779 780 static int open_rx_first(struct atm_vcc *vcc) 781 { 782 struct eni_dev *eni_dev; 783 struct eni_vcc *eni_vcc; 784 unsigned long size; 785 786 DPRINTK("open_rx_first\n"); 787 eni_dev = ENI_DEV(vcc->dev); 788 eni_vcc = ENI_VCC(vcc); 789 eni_vcc->rx = NULL; 790 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; 791 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; 792 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= 793 MID_MAX_BUF_SIZE) 794 size = MID_MAX_BUF_SIZE; 795 eni_vcc->recv = eni_alloc_mem(eni_dev,&size); 796 DPRINTK("rx at 0x%lx\n",eni_vcc->recv); 797 eni_vcc->words = size >> 2; 798 if (!eni_vcc->recv) return -ENOBUFS; 799 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; 800 eni_vcc->descr = 0; 801 eni_vcc->rx_pos = 0; 802 eni_vcc->rxing = 0; 803 eni_vcc->servicing = 0; 804 eni_vcc->next = ENI_VCC_NOS; 805 return 0; 806 } 807 808 809 static int open_rx_second(struct atm_vcc *vcc) 810 { 811 void __iomem *here; 812 struct eni_dev *eni_dev; 813 struct eni_vcc *eni_vcc; 814 unsigned long size; 815 int order; 816 817 DPRINTK("open_rx_second\n"); 818 eni_dev = ENI_DEV(vcc->dev); 819 eni_vcc = ENI_VCC(vcc); 820 if (!eni_vcc->rx) return 0; 821 /* set up VCI descriptor */ 822 here = eni_dev->vci+vcc->vci*16; 823 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); 824 size = eni_vcc->words >> 8; 825 for (order = -1; size; order++) size >>= 1; 826 writel(0,here+4); /* descr, read = 0 */ 827 writel(0,here+8); /* write, state, count = 0 */ 828 if (eni_dev->rx_map[vcc->vci]) 829 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " 830 "in use\n",vcc->dev->number,vcc->vci); 831 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ 832 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << 833 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | 834 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << 835 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); 836 return 0; 837 } 838 839 840 static void close_rx(struct atm_vcc *vcc) 841 { 842 DECLARE_WAITQUEUE(wait,current); 843 void __iomem *here; 844 struct eni_dev *eni_dev; 845 struct eni_vcc *eni_vcc; 846 847 eni_vcc = ENI_VCC(vcc); 848 if (!eni_vcc->rx) return; 849 eni_dev = ENI_DEV(vcc->dev); 850 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { 851 here = eni_dev->vci+vcc->vci*16; 852 /* block receiver */ 853 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << 854 MID_VCI_MODE_SHIFT),here); 855 /* wait for receiver to become idle */ 856 udelay(27); 857 /* discard pending cell */ 858 writel(readl(here) & ~MID_VCI_IN_SERVICE,here); 859 /* don't accept any new ones */ 860 eni_dev->rx_map[vcc->vci] = NULL; 861 /* wait for RX queue to drain */ 862 DPRINTK("eni_close: waiting for RX ...\n"); 863 EVENT("RX closing\n",0,0); 864 add_wait_queue(&eni_dev->rx_wait,&wait); 865 set_current_state(TASK_UNINTERRUPTIBLE); 866 barrier(); 867 for (;;) { 868 /* transition service->rx: rxing++, servicing-- */ 869 if (!eni_vcc->servicing) { 870 barrier(); 871 if (!eni_vcc->rxing) break; 872 } 873 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, 874 eni_vcc->servicing); 875 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, 876 eni_vcc->rxing); 877 schedule(); 878 set_current_state(TASK_UNINTERRUPTIBLE); 879 } 880 for (;;) { 881 int at_end; 882 u32 tmp; 883 884 tasklet_disable(&eni_dev->task); 885 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; 886 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; 887 tasklet_enable(&eni_dev->task); 888 if (at_end) break; 889 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", 890 eni_vcc->rx_pos,tmp); 891 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", 892 eni_vcc->rx_pos,tmp); 893 schedule(); 894 set_current_state(TASK_UNINTERRUPTIBLE); 895 } 896 set_current_state(TASK_RUNNING); 897 remove_wait_queue(&eni_dev->rx_wait,&wait); 898 } 899 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); 900 eni_vcc->rx = NULL; 901 } 902 903 904 static int start_rx(struct atm_dev *dev) 905 { 906 struct eni_dev *eni_dev; 907 908 eni_dev = ENI_DEV(dev); 909 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); 910 if (!eni_dev->rx_map) { 911 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 912 dev->number); 913 free_page((unsigned long) eni_dev->free_list); 914 return -ENOMEM; 915 } 916 eni_dev->rx_mult = DEFAULT_RX_MULT; 917 eni_dev->fast = eni_dev->last_fast = NULL; 918 eni_dev->slow = eni_dev->last_slow = NULL; 919 init_waitqueue_head(&eni_dev->rx_wait); 920 skb_queue_head_init(&eni_dev->rx_queue); 921 eni_dev->serv_read = eni_in(MID_SERV_WRITE); 922 eni_out(0,MID_DMA_WR_RX); 923 return 0; 924 } 925 926 927 /*----------------------------------- TX ------------------------------------*/ 928 929 930 enum enq_res { enq_ok,enq_next,enq_jam }; 931 932 933 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 934 u32 size) 935 { 936 u32 init,words; 937 938 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 939 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 940 #if 0 /* don't complain anymore */ 941 if (paddr & 3) 942 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 943 if (size & 3) 944 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 945 #endif 946 if (paddr & 3) { 947 init = 4-(paddr & 3); 948 if (init > size || size < 7) init = size; 949 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 950 (unsigned long) paddr,init,size); 951 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 952 (chan << MID_DMA_CHAN_SHIFT); 953 dma[(*j)++] = paddr; 954 paddr += init; 955 size -= init; 956 } 957 words = size >> 2; 958 size &= 3; 959 if (words && (paddr & 31)) { 960 init = 8-((paddr & 31) >> 2); 961 if (init > words) init = words; 962 DPRINTK("put_dma: %lx DMA: %d/%d words\n", 963 (unsigned long) paddr,init,words); 964 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 965 (chan << MID_DMA_CHAN_SHIFT); 966 dma[(*j)++] = paddr; 967 paddr += init << 2; 968 words -= init; 969 } 970 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 971 if (words & ~15) { 972 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 973 (unsigned long) paddr,words >> 4,words); 974 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 975 | (chan << MID_DMA_CHAN_SHIFT); 976 dma[(*j)++] = paddr; 977 paddr += (words & ~15) << 2; 978 words &= 15; 979 } 980 #endif 981 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 982 if (words & ~7) { 983 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 984 (unsigned long) paddr,words >> 3,words); 985 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 986 | (chan << MID_DMA_CHAN_SHIFT); 987 dma[(*j)++] = paddr; 988 paddr += (words & ~7) << 2; 989 words &= 7; 990 } 991 #endif 992 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 993 if (words & ~3) { 994 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 995 (unsigned long) paddr,words >> 2,words); 996 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 997 | (chan << MID_DMA_CHAN_SHIFT); 998 dma[(*j)++] = paddr; 999 paddr += (words & ~3) << 2; 1000 words &= 3; 1001 } 1002 #endif 1003 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 1004 if (words & ~1) { 1005 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 1006 (unsigned long) paddr,words >> 1,words); 1007 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 1008 | (chan << MID_DMA_CHAN_SHIFT); 1009 dma[(*j)++] = paddr; 1010 paddr += (words & ~1) << 2; 1011 words &= 1; 1012 } 1013 #endif 1014 if (words) { 1015 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 1016 words); 1017 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 1018 (chan << MID_DMA_CHAN_SHIFT); 1019 dma[(*j)++] = paddr; 1020 paddr += words << 2; 1021 } 1022 if (size) { 1023 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 1024 size); 1025 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 1026 (chan << MID_DMA_CHAN_SHIFT); 1027 dma[(*j)++] = paddr; 1028 } 1029 } 1030 1031 1032 static enum enq_res do_tx(struct sk_buff *skb) 1033 { 1034 struct atm_vcc *vcc; 1035 struct eni_dev *eni_dev; 1036 struct eni_vcc *eni_vcc; 1037 struct eni_tx *tx; 1038 dma_addr_t paddr; 1039 u32 dma_rd,dma_wr; 1040 u32 size; /* in words */ 1041 int aal5,dma_size,i,j; 1042 1043 DPRINTK(">do_tx\n"); 1044 NULLCHECK(skb); 1045 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1046 vcc = ATM_SKB(skb)->vcc; 1047 NULLCHECK(vcc); 1048 eni_dev = ENI_DEV(vcc->dev); 1049 NULLCHECK(eni_dev); 1050 eni_vcc = ENI_VCC(vcc); 1051 tx = eni_vcc->tx; 1052 NULLCHECK(tx); 1053 #if 0 /* Enable this for testing with the "align" program */ 1054 { 1055 unsigned int hack = *((char *) skb->data)-'0'; 1056 1057 if (hack < 8) { 1058 skb->data += hack; 1059 skb->len -= hack; 1060 } 1061 } 1062 #endif 1063 #if 0 /* should work now */ 1064 if ((unsigned long) skb->data & 3) 1065 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1066 "TX data\n",vcc->dev->number,vcc->vci); 1067 #endif 1068 /* 1069 * Potential future IP speedup: make hard_header big enough to put 1070 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1071 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1072 */ 1073 1074 aal5 = vcc->qos.aal == ATM_AAL5; 1075 /* check space in buffer */ 1076 if (!aal5) 1077 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1078 /* cell without HEC plus segmentation header (includes 1079 four-byte cell header) */ 1080 else { 1081 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1082 /* add AAL5 trailer */ 1083 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1084 /* add segmentation header */ 1085 } 1086 /* 1087 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1088 * to the read pointer ? TX_GAP means to leave some space for what 1089 * the manual calls "too close". 1090 */ 1091 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1092 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1093 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1094 vcc->dev->number,size); 1095 return enq_next; 1096 } 1097 /* check DMA */ 1098 dma_wr = eni_in(MID_DMA_WR_TX); 1099 dma_rd = eni_in(MID_DMA_RD_TX); 1100 dma_size = 3; /* JK for descriptor and final fill, plus final size 1101 mis-alignment fix */ 1102 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1103 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1104 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1105 if (dma_size > TX_DMA_BUF) { 1106 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1107 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1108 } 1109 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1110 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1111 dma_size) { 1112 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1113 vcc->dev->number); 1114 return enq_jam; 1115 } 1116 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 1117 PCI_DMA_TODEVICE); 1118 ENI_PRV_PADDR(skb) = paddr; 1119 /* prepare DMA queue entries */ 1120 j = 0; 1121 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1122 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1123 MID_DT_JK; 1124 j++; 1125 if (!skb_shinfo(skb)->nr_frags) 1126 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1127 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1128 else { 1129 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1130 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1131 if (i == -1) 1132 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1133 skb->data, 1134 skb_headlen(skb)); 1135 else 1136 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1137 skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset, 1138 skb_shinfo(skb)->frags[i].size); 1139 } 1140 if (skb->len & 3) 1141 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3)); 1142 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1143 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1144 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1145 MID_DMA_END | MID_DT_JK; 1146 j++; 1147 DPRINTK("DMA at end: %d\n",j); 1148 /* store frame */ 1149 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1150 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1151 (tx->resolution << MID_SEG_RATE_SHIFT) | 1152 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1153 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1154 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1155 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1156 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1157 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1158 DPRINTK("size: %d, len:%d\n",size,skb->len); 1159 if (aal5) 1160 writel(skb->len,tx->send+ 1161 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1162 j = j >> 1; 1163 for (i = 0; i < j; i++) { 1164 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1165 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1166 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1167 } 1168 ENI_PRV_POS(skb) = tx->tx_pos; 1169 ENI_PRV_SIZE(skb) = size; 1170 ENI_VCC(vcc)->txing += size; 1171 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1172 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1173 eni_out(dma_wr,MID_DMA_WR_TX); 1174 skb_queue_tail(&eni_dev->tx_queue,skb); 1175 queued++; 1176 return enq_ok; 1177 } 1178 1179 1180 static void poll_tx(struct atm_dev *dev) 1181 { 1182 struct eni_tx *tx; 1183 struct sk_buff *skb; 1184 enum enq_res res; 1185 int i; 1186 1187 DPRINTK(">poll_tx\n"); 1188 for (i = NR_CHAN-1; i >= 0; i--) { 1189 tx = &ENI_DEV(dev)->tx[i]; 1190 if (tx->send) 1191 while ((skb = skb_dequeue(&tx->backlog))) { 1192 res = do_tx(skb); 1193 if (res == enq_ok) continue; 1194 DPRINTK("re-queuing TX PDU\n"); 1195 skb_queue_head(&tx->backlog,skb); 1196 requeued++; 1197 if (res == enq_jam) return; 1198 break; 1199 } 1200 } 1201 } 1202 1203 1204 static void dequeue_tx(struct atm_dev *dev) 1205 { 1206 struct eni_dev *eni_dev; 1207 struct atm_vcc *vcc; 1208 struct sk_buff *skb; 1209 struct eni_tx *tx; 1210 1211 NULLCHECK(dev); 1212 eni_dev = ENI_DEV(dev); 1213 NULLCHECK(eni_dev); 1214 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1215 vcc = ATM_SKB(skb)->vcc; 1216 NULLCHECK(vcc); 1217 tx = ENI_VCC(vcc)->tx; 1218 NULLCHECK(ENI_VCC(vcc)->tx); 1219 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1220 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1221 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1222 eni_in(MID_TX_DESCRSTART(tx->index))) { 1223 skb_queue_head(&eni_dev->tx_queue,skb); 1224 break; 1225 } 1226 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1227 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 1228 PCI_DMA_TODEVICE); 1229 if (vcc->pop) vcc->pop(vcc,skb); 1230 else dev_kfree_skb_irq(skb); 1231 atomic_inc(&vcc->stats->tx); 1232 wake_up(&eni_dev->tx_wait); 1233 dma_complete++; 1234 } 1235 } 1236 1237 1238 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1239 { 1240 int i; 1241 1242 for (i = !ubr; i < NR_CHAN; i++) 1243 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1244 return NULL; 1245 } 1246 1247 1248 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1249 int *res,int unlimited) 1250 { 1251 static const int pre_div[] = { 4,16,128,2048 }; 1252 /* 2^(((x+2)^2-(x+2))/2+1) */ 1253 1254 if (unlimited) *pre = *res = 0; 1255 else { 1256 if (*pcr > 0) { 1257 int div; 1258 1259 for (*pre = 0; *pre < 3; (*pre)++) 1260 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1261 div = pre_div[*pre]**pcr; 1262 DPRINTK("min div %d\n",div); 1263 *res = TS_CLOCK/div-1; 1264 } 1265 else { 1266 int div; 1267 1268 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1269 for (*pre = 3; *pre >= 0; (*pre)--) 1270 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1271 if (*pre < 3) (*pre)++; /* else fail later */ 1272 div = pre_div[*pre]*-*pcr; 1273 DPRINTK("max div %d\n",div); 1274 *res = DIV_ROUND_UP(TS_CLOCK, div)-1; 1275 } 1276 if (*res < 0) *res = 0; 1277 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1278 } 1279 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1280 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1281 return 0; 1282 } 1283 1284 1285 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1286 int set_rsv,int set_shp) 1287 { 1288 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1289 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1290 struct eni_tx *tx; 1291 unsigned long size; 1292 void __iomem *mem; 1293 int rate,ubr,unlimited,new_tx; 1294 int pre,res,order; 1295 int error; 1296 1297 rate = atm_pcr_goal(txtp); 1298 ubr = txtp->traffic_class == ATM_UBR; 1299 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1300 rate >= ATM_OC3_PCR); 1301 if (!unlimited) { 1302 size = txtp->max_sdu*eni_dev->tx_mult/100; 1303 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1304 MID_MAX_BUF_SIZE) 1305 size = MID_MAX_BUF_SIZE; 1306 } 1307 else { 1308 if (eni_dev->ubr) { 1309 eni_vcc->tx = eni_dev->ubr; 1310 txtp->pcr = ATM_OC3_PCR; 1311 return 0; 1312 } 1313 size = UBR_BUFFER; 1314 } 1315 new_tx = !eni_vcc->tx; 1316 mem = NULL; /* for gcc */ 1317 if (!new_tx) tx = eni_vcc->tx; 1318 else { 1319 mem = eni_alloc_mem(eni_dev,&size); 1320 if (!mem) return -ENOBUFS; 1321 tx = alloc_tx(eni_dev,unlimited); 1322 if (!tx) { 1323 eni_free_mem(eni_dev,mem,size); 1324 return -EBUSY; 1325 } 1326 DPRINTK("got chan %d\n",tx->index); 1327 tx->reserved = tx->shaping = 0; 1328 tx->send = mem; 1329 tx->words = size >> 2; 1330 skb_queue_head_init(&tx->backlog); 1331 for (order = 0; size > (1 << (order+10)); order++); 1332 eni_out((order << MID_SIZE_SHIFT) | 1333 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1334 MID_TX_PLACE(tx->index)); 1335 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1336 MID_DESCR_START; 1337 } 1338 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1339 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1340 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1341 txtp->max_pcr < rate) error = -EINVAL; 1342 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1343 error = -EINVAL; 1344 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1345 error = -EINVAL; 1346 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1347 error = -EINVAL; 1348 if (error) { 1349 if (new_tx) { 1350 tx->send = NULL; 1351 eni_free_mem(eni_dev,mem,size); 1352 } 1353 return error; 1354 } 1355 txtp->pcr = rate; 1356 if (set_rsv && !ubr) { 1357 eni_dev->tx_bw += tx->reserved; 1358 tx->reserved = rate; 1359 eni_dev->tx_bw -= rate; 1360 } 1361 if (set_shp || (unlimited && new_tx)) { 1362 if (unlimited && new_tx) eni_dev->ubr = tx; 1363 tx->prescaler = pre; 1364 tx->resolution = res; 1365 tx->shaping = rate; 1366 } 1367 if (set_shp) eni_vcc->tx = tx; 1368 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1369 return 0; 1370 } 1371 1372 1373 static int open_tx_first(struct atm_vcc *vcc) 1374 { 1375 ENI_VCC(vcc)->tx = NULL; 1376 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1377 ENI_VCC(vcc)->txing = 0; 1378 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1379 } 1380 1381 1382 static int open_tx_second(struct atm_vcc *vcc) 1383 { 1384 return 0; /* nothing to do */ 1385 } 1386 1387 1388 static void close_tx(struct atm_vcc *vcc) 1389 { 1390 DECLARE_WAITQUEUE(wait,current); 1391 struct eni_dev *eni_dev; 1392 struct eni_vcc *eni_vcc; 1393 1394 eni_vcc = ENI_VCC(vcc); 1395 if (!eni_vcc->tx) return; 1396 eni_dev = ENI_DEV(vcc->dev); 1397 /* wait for TX queue to drain */ 1398 DPRINTK("eni_close: waiting for TX ...\n"); 1399 add_wait_queue(&eni_dev->tx_wait,&wait); 1400 set_current_state(TASK_UNINTERRUPTIBLE); 1401 for (;;) { 1402 int txing; 1403 1404 tasklet_disable(&eni_dev->task); 1405 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1406 tasklet_enable(&eni_dev->task); 1407 if (!txing) break; 1408 DPRINTK("%d TX left\n",eni_vcc->txing); 1409 schedule(); 1410 set_current_state(TASK_UNINTERRUPTIBLE); 1411 } 1412 set_current_state(TASK_RUNNING); 1413 remove_wait_queue(&eni_dev->tx_wait,&wait); 1414 if (eni_vcc->tx != eni_dev->ubr) { 1415 /* 1416 * Looping a few times in here is probably far cheaper than 1417 * keeping track of TX completions all the time, so let's poll 1418 * a bit ... 1419 */ 1420 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1421 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1422 schedule(); 1423 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1424 eni_vcc->tx->send = NULL; 1425 eni_dev->tx_bw += eni_vcc->tx->reserved; 1426 } 1427 eni_vcc->tx = NULL; 1428 } 1429 1430 1431 static int start_tx(struct atm_dev *dev) 1432 { 1433 struct eni_dev *eni_dev; 1434 int i; 1435 1436 eni_dev = ENI_DEV(dev); 1437 eni_dev->lost = 0; 1438 eni_dev->tx_bw = ATM_OC3_PCR; 1439 eni_dev->tx_mult = DEFAULT_TX_MULT; 1440 init_waitqueue_head(&eni_dev->tx_wait); 1441 eni_dev->ubr = NULL; 1442 skb_queue_head_init(&eni_dev->tx_queue); 1443 eni_out(0,MID_DMA_WR_TX); 1444 for (i = 0; i < NR_CHAN; i++) { 1445 eni_dev->tx[i].send = NULL; 1446 eni_dev->tx[i].index = i; 1447 } 1448 return 0; 1449 } 1450 1451 1452 /*--------------------------------- common ----------------------------------*/ 1453 1454 1455 #if 0 /* may become useful again when tuning things */ 1456 1457 static void foo(void) 1458 { 1459 printk(KERN_INFO 1460 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1461 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1462 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1463 rx_enqueued,rx_dequeued,putting,pushed); 1464 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1465 } 1466 1467 #endif 1468 1469 1470 static void bug_int(struct atm_dev *dev,unsigned long reason) 1471 { 1472 DPRINTK(">bug_int\n"); 1473 if (reason & MID_DMA_ERR_ACK) 1474 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1475 "error\n",dev->number); 1476 if (reason & MID_TX_IDENT_MISM) 1477 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1478 "mismatch\n",dev->number); 1479 if (reason & MID_TX_DMA_OVFL) 1480 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1481 "overflow\n",dev->number); 1482 EVENT("---dump ends here---\n",0,0); 1483 printk(KERN_NOTICE "---recent events---\n"); 1484 event_dump(); 1485 } 1486 1487 1488 static irqreturn_t eni_int(int irq,void *dev_id) 1489 { 1490 struct atm_dev *dev; 1491 struct eni_dev *eni_dev; 1492 u32 reason; 1493 1494 DPRINTK(">eni_int\n"); 1495 dev = dev_id; 1496 eni_dev = ENI_DEV(dev); 1497 reason = eni_in(MID_ISA); 1498 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1499 /* 1500 * Must handle these two right now, because reading ISA doesn't clear 1501 * them, so they re-occur and we never make it to the tasklet. Since 1502 * they're rare, we don't mind the occasional invocation of eni_tasklet 1503 * with eni_dev->events == 0. 1504 */ 1505 if (reason & MID_STAT_OVFL) { 1506 EVENT("stat overflow\n",0,0); 1507 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1508 } 1509 if (reason & MID_SUNI_INT) { 1510 EVENT("SUNI int\n",0,0); 1511 dev->phy->interrupt(dev); 1512 #if 0 1513 foo(); 1514 #endif 1515 } 1516 spin_lock(&eni_dev->lock); 1517 eni_dev->events |= reason; 1518 spin_unlock(&eni_dev->lock); 1519 tasklet_schedule(&eni_dev->task); 1520 return IRQ_HANDLED; 1521 } 1522 1523 1524 static void eni_tasklet(unsigned long data) 1525 { 1526 struct atm_dev *dev = (struct atm_dev *) data; 1527 struct eni_dev *eni_dev = ENI_DEV(dev); 1528 unsigned long flags; 1529 u32 events; 1530 1531 DPRINTK("eni_tasklet (dev %p)\n",dev); 1532 spin_lock_irqsave(&eni_dev->lock,flags); 1533 events = xchg(&eni_dev->events,0); 1534 spin_unlock_irqrestore(&eni_dev->lock,flags); 1535 if (events & MID_RX_DMA_COMPLETE) { 1536 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1537 dequeue_rx(dev); 1538 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1539 poll_rx(dev); 1540 EVENT("poll_rx done\n",0,0); 1541 /* poll_tx ? */ 1542 } 1543 if (events & MID_SERVICE) { 1544 EVENT("INT: service, starting get_service\n",0,0); 1545 get_service(dev); 1546 EVENT("get_service done, starting poll_rx\n",0,0); 1547 poll_rx(dev); 1548 EVENT("poll_rx done\n",0,0); 1549 } 1550 if (events & MID_TX_DMA_COMPLETE) { 1551 EVENT("INT: TX DMA COMPLETE\n",0,0); 1552 dequeue_tx(dev); 1553 } 1554 if (events & MID_TX_COMPLETE) { 1555 EVENT("INT: TX COMPLETE\n",0,0); 1556 tx_complete++; 1557 wake_up(&eni_dev->tx_wait); 1558 /* poll_rx ? */ 1559 } 1560 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1561 EVENT("bug interrupt\n",0,0); 1562 bug_int(dev,events); 1563 } 1564 poll_tx(dev); 1565 } 1566 1567 1568 /*--------------------------------- entries ---------------------------------*/ 1569 1570 1571 static const char *media_name[] __devinitdata = { 1572 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1573 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1574 "TAXI","09?", "10?", "11?", /* 8-11 */ 1575 "12?", "13?", "14?", "15?", /* 12-15 */ 1576 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1577 "UTP", "21?", "22?", "23?", /* 20-23 */ 1578 "24?", "25?", "26?", "27?", /* 24-27 */ 1579 "28?", "29?", "30?", "31?" /* 28-31 */ 1580 }; 1581 1582 1583 #define SET_SEPROM \ 1584 ({ if (!error && !pci_error) { \ 1585 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1586 udelay(10); /* 10 usecs */ \ 1587 } }) 1588 #define GET_SEPROM \ 1589 ({ if (!error && !pci_error) { \ 1590 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1591 udelay(10); /* 10 usecs */ \ 1592 } }) 1593 1594 1595 static int __devinit get_esi_asic(struct atm_dev *dev) 1596 { 1597 struct eni_dev *eni_dev; 1598 unsigned char tonga; 1599 int error,failed,pci_error; 1600 int address,i,j; 1601 1602 eni_dev = ENI_DEV(dev); 1603 error = pci_error = 0; 1604 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1605 SET_SEPROM; 1606 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1607 /* start operation */ 1608 tonga |= SEPROM_DATA; 1609 SET_SEPROM; 1610 tonga |= SEPROM_CLK; 1611 SET_SEPROM; 1612 tonga &= ~SEPROM_DATA; 1613 SET_SEPROM; 1614 tonga &= ~SEPROM_CLK; 1615 SET_SEPROM; 1616 /* send address */ 1617 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1618 for (j = 7; j >= 0; j--) { 1619 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1620 tonga & ~SEPROM_DATA; 1621 SET_SEPROM; 1622 tonga |= SEPROM_CLK; 1623 SET_SEPROM; 1624 tonga &= ~SEPROM_CLK; 1625 SET_SEPROM; 1626 } 1627 /* get ack */ 1628 tonga |= SEPROM_DATA; 1629 SET_SEPROM; 1630 tonga |= SEPROM_CLK; 1631 SET_SEPROM; 1632 GET_SEPROM; 1633 failed = tonga & SEPROM_DATA; 1634 tonga &= ~SEPROM_CLK; 1635 SET_SEPROM; 1636 tonga |= SEPROM_DATA; 1637 SET_SEPROM; 1638 if (failed) error = -EIO; 1639 else { 1640 dev->esi[i] = 0; 1641 for (j = 7; j >= 0; j--) { 1642 dev->esi[i] <<= 1; 1643 tonga |= SEPROM_DATA; 1644 SET_SEPROM; 1645 tonga |= SEPROM_CLK; 1646 SET_SEPROM; 1647 GET_SEPROM; 1648 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1649 tonga &= ~SEPROM_CLK; 1650 SET_SEPROM; 1651 tonga |= SEPROM_DATA; 1652 SET_SEPROM; 1653 } 1654 /* get ack */ 1655 tonga |= SEPROM_DATA; 1656 SET_SEPROM; 1657 tonga |= SEPROM_CLK; 1658 SET_SEPROM; 1659 GET_SEPROM; 1660 if (!(tonga & SEPROM_DATA)) error = -EIO; 1661 tonga &= ~SEPROM_CLK; 1662 SET_SEPROM; 1663 tonga |= SEPROM_DATA; 1664 SET_SEPROM; 1665 } 1666 /* stop operation */ 1667 tonga &= ~SEPROM_DATA; 1668 SET_SEPROM; 1669 tonga |= SEPROM_CLK; 1670 SET_SEPROM; 1671 tonga |= SEPROM_DATA; 1672 SET_SEPROM; 1673 } 1674 if (pci_error) { 1675 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1676 "(0x%02x)\n",dev->number,pci_error); 1677 error = -EIO; 1678 } 1679 return error; 1680 } 1681 1682 1683 #undef SET_SEPROM 1684 #undef GET_SEPROM 1685 1686 1687 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1688 { 1689 void __iomem *mac_base; 1690 int i; 1691 1692 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1693 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1694 return 0; 1695 } 1696 1697 1698 static int __devinit eni_do_init(struct atm_dev *dev) 1699 { 1700 struct midway_eprom __iomem *eprom; 1701 struct eni_dev *eni_dev; 1702 struct pci_dev *pci_dev; 1703 unsigned long real_base; 1704 void __iomem *base; 1705 int error,i,last; 1706 1707 DPRINTK(">eni_init\n"); 1708 dev->ci_range.vpi_bits = 0; 1709 dev->ci_range.vci_bits = NR_VCI_LD; 1710 dev->link_rate = ATM_OC3_PCR; 1711 eni_dev = ENI_DEV(dev); 1712 pci_dev = eni_dev->pci_dev; 1713 real_base = pci_resource_start(pci_dev, 0); 1714 eni_dev->irq = pci_dev->irq; 1715 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1716 PCI_COMMAND_MEMORY | 1717 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1718 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1719 "(0x%02x)\n",dev->number,error); 1720 return -EIO; 1721 } 1722 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1723 dev->number,pci_dev->revision,real_base,eni_dev->irq); 1724 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 1725 printk("\n"); 1726 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1727 "mapping\n",dev->number); 1728 return error; 1729 } 1730 eni_dev->base_diff = real_base - (unsigned long) base; 1731 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1732 if (!eni_dev->asic) { 1733 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1734 if (readl(&eprom->magic) != ENI155_MAGIC) { 1735 printk("\n"); 1736 printk(KERN_ERR DEV_LABEL 1737 "(itf %d): bad magic - expected 0x%x, got 0x%x\n", 1738 dev->number, ENI155_MAGIC, 1739 (unsigned)readl(&eprom->magic)); 1740 error = -EINVAL; 1741 goto unmap; 1742 } 1743 } 1744 eni_dev->phy = base+PHY_BASE; 1745 eni_dev->reg = base+REG_BASE; 1746 eni_dev->ram = base+RAM_BASE; 1747 last = MAP_MAX_SIZE-RAM_BASE; 1748 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1749 writel(0x55555555,eni_dev->ram+i); 1750 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1751 else { 1752 writel(0xAAAAAAAA,eni_dev->ram+i); 1753 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1754 else writel(i,eni_dev->ram+i); 1755 } 1756 } 1757 for (i = 0; i < last; i += RAM_INCREMENT) 1758 if (readl(eni_dev->ram+i) != i) break; 1759 eni_dev->mem = i; 1760 memset_io(eni_dev->ram,0,eni_dev->mem); 1761 /* TODO: should shrink allocation now */ 1762 printk("mem=%dkB (",eni_dev->mem >> 10); 1763 /* TODO: check for non-SUNI, check for TAXI ? */ 1764 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1765 printk(")\n"); 1766 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1767 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1768 error = -EINVAL; 1769 goto unmap; 1770 } 1771 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1772 if (error) 1773 goto unmap; 1774 for (i = 0; i < ESI_LEN; i++) 1775 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1776 printk(")\n"); 1777 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1778 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1779 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]); 1780 1781 error = suni_init(dev); 1782 if (error) 1783 goto unmap; 1784 out: 1785 return error; 1786 unmap: 1787 iounmap(base); 1788 goto out; 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,IRQF_SHARED,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 error = -EAGAIN; 1806 goto out; 1807 } 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 goto free_irq; 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 goto free_irq; 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 = 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 error = -ENOMEM; 1843 goto free_irq; 1844 } 1845 eni_dev->free_len = 0; 1846 eni_put_free(eni_dev,buf,buffer_mem); 1847 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1848 /* 1849 * byte_addr free (k) 1850 * 0x00000000 512 VCI table 1851 * 0x00004000 496 RX DMA 1852 * 0x00005000 492 TX DMA 1853 * 0x00006000 488 service list 1854 * 0x00007000 484 buffers 1855 * 0x00080000 0 end (512kB) 1856 */ 1857 eni_out(0xffffffff,MID_IE); 1858 error = start_tx(dev); 1859 if (error) goto free_list; 1860 error = start_rx(dev); 1861 if (error) goto free_list; 1862 error = dev->phy->start(dev); 1863 if (error) goto free_list; 1864 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1865 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1866 MID_MC_S); 1867 /* Tonga uses SBus INTReq1 */ 1868 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1869 return 0; 1870 1871 free_list: 1872 kfree(eni_dev->free_list); 1873 1874 free_irq: 1875 free_irq(eni_dev->irq, eni_dev); 1876 1877 out: 1878 return error; 1879 } 1880 1881 1882 static void eni_close(struct atm_vcc *vcc) 1883 { 1884 DPRINTK(">eni_close\n"); 1885 if (!ENI_VCC(vcc)) return; 1886 clear_bit(ATM_VF_READY,&vcc->flags); 1887 close_rx(vcc); 1888 close_tx(vcc); 1889 DPRINTK("eni_close: done waiting\n"); 1890 /* deallocate memory */ 1891 kfree(ENI_VCC(vcc)); 1892 vcc->dev_data = NULL; 1893 clear_bit(ATM_VF_ADDR,&vcc->flags); 1894 /*foo();*/ 1895 } 1896 1897 1898 static int eni_open(struct atm_vcc *vcc) 1899 { 1900 struct eni_vcc *eni_vcc; 1901 int error; 1902 short vpi = vcc->vpi; 1903 int vci = vcc->vci; 1904 1905 DPRINTK(">eni_open\n"); 1906 EVENT("eni_open\n",0,0); 1907 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1908 vcc->dev_data = NULL; 1909 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1910 set_bit(ATM_VF_ADDR,&vcc->flags); 1911 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1912 return -EINVAL; 1913 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1914 vcc->vci); 1915 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1916 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1917 if (!eni_vcc) return -ENOMEM; 1918 vcc->dev_data = eni_vcc; 1919 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1920 if ((error = open_rx_first(vcc))) { 1921 eni_close(vcc); 1922 return error; 1923 } 1924 if ((error = open_tx_first(vcc))) { 1925 eni_close(vcc); 1926 return error; 1927 } 1928 } 1929 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1930 if ((error = open_rx_second(vcc))) { 1931 eni_close(vcc); 1932 return error; 1933 } 1934 if ((error = open_tx_second(vcc))) { 1935 eni_close(vcc); 1936 return error; 1937 } 1938 set_bit(ATM_VF_READY,&vcc->flags); 1939 /* should power down SUNI while !ref_count @@@ */ 1940 return 0; 1941 } 1942 1943 1944 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1945 { 1946 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1947 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1948 struct sk_buff *skb; 1949 int error,rate,rsv,shp; 1950 1951 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1952 if (tx == eni_dev->ubr) return -EBADFD; 1953 rate = atm_pcr_goal(&qos->txtp); 1954 if (rate < 0) rate = -rate; 1955 rsv = shp = 0; 1956 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1957 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1958 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1959 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1960 if (!rsv && !shp) return 0; 1961 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1962 if (error) return error; 1963 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1964 /* 1965 * Walk through the send buffer and patch the rate information in all 1966 * segmentation buffer descriptors of this VCC. 1967 */ 1968 tasklet_disable(&eni_dev->task); 1969 skb_queue_walk(&eni_dev->tx_queue, skb) { 1970 void __iomem *dsc; 1971 1972 if (ATM_SKB(skb)->vcc != vcc) continue; 1973 dsc = tx->send+ENI_PRV_POS(skb)*4; 1974 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1975 (tx->prescaler << MID_SEG_PR_SHIFT) | 1976 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1977 } 1978 tasklet_enable(&eni_dev->task); 1979 return 0; 1980 } 1981 1982 1983 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1984 { 1985 struct eni_dev *eni_dev = ENI_DEV(dev); 1986 1987 if (cmd == ENI_MEMDUMP) { 1988 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1989 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 1990 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 1991 dump(dev); 1992 return 0; 1993 } 1994 if (cmd == ENI_SETMULT) { 1995 struct eni_multipliers mult; 1996 1997 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1998 if (copy_from_user(&mult, arg, 1999 sizeof(struct eni_multipliers))) 2000 return -EFAULT; 2001 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2002 mult.tx > 65536 || mult.rx > 65536) 2003 return -EINVAL; 2004 if (mult.tx) eni_dev->tx_mult = mult.tx; 2005 if (mult.rx) eni_dev->rx_mult = mult.rx; 2006 return 0; 2007 } 2008 if (cmd == ATM_SETCIRANGE) { 2009 struct atm_cirange ci; 2010 2011 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2012 return -EFAULT; 2013 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2014 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2015 return 0; 2016 return -EINVAL; 2017 } 2018 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2019 return dev->phy->ioctl(dev,cmd,arg); 2020 } 2021 2022 2023 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2024 void __user *optval,int optlen) 2025 { 2026 return -EINVAL; 2027 } 2028 2029 2030 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2031 void __user *optval,unsigned int optlen) 2032 { 2033 return -EINVAL; 2034 } 2035 2036 2037 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2038 { 2039 enum enq_res res; 2040 2041 DPRINTK(">eni_send\n"); 2042 if (!ENI_VCC(vcc)->tx) { 2043 if (vcc->pop) vcc->pop(vcc,skb); 2044 else dev_kfree_skb(skb); 2045 return -EINVAL; 2046 } 2047 if (!skb) { 2048 printk(KERN_CRIT "!skb in eni_send ?\n"); 2049 if (vcc->pop) vcc->pop(vcc,skb); 2050 return -EINVAL; 2051 } 2052 if (vcc->qos.aal == ATM_AAL0) { 2053 if (skb->len != ATM_CELL_SIZE-1) { 2054 if (vcc->pop) vcc->pop(vcc,skb); 2055 else dev_kfree_skb(skb); 2056 return -EINVAL; 2057 } 2058 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2059 } 2060 submitted++; 2061 ATM_SKB(skb)->vcc = vcc; 2062 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2063 res = do_tx(skb); 2064 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2065 if (res == enq_ok) return 0; 2066 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2067 backlogged++; 2068 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2069 return 0; 2070 } 2071 2072 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2073 unsigned long addr) 2074 { 2075 writel(value,ENI_DEV(dev)->phy+addr*4); 2076 } 2077 2078 2079 2080 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2081 { 2082 return readl(ENI_DEV(dev)->phy+addr*4); 2083 } 2084 2085 2086 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2087 { 2088 struct hlist_node *node; 2089 struct sock *s; 2090 static const char *signal[] = { "LOST","unknown","okay" }; 2091 struct eni_dev *eni_dev = ENI_DEV(dev); 2092 struct atm_vcc *vcc; 2093 int left,i; 2094 2095 left = *pos; 2096 if (!left) 2097 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2098 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2099 eni_dev->mem >> 10,eni_dev->tx_bw); 2100 if (!--left) 2101 return sprintf(page,"%4sBursts: TX" 2102 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2103 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2104 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2105 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2106 " none" 2107 #endif 2108 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2109 " 16W" 2110 #endif 2111 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2112 " 8W" 2113 #endif 2114 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2115 " 4W" 2116 #endif 2117 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2118 " 2W" 2119 #endif 2120 ", RX" 2121 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2122 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2123 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2124 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2125 " none" 2126 #endif 2127 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2128 " 16W" 2129 #endif 2130 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2131 " 8W" 2132 #endif 2133 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2134 " 4W" 2135 #endif 2136 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2137 " 2W" 2138 #endif 2139 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2140 " (default)" 2141 #endif 2142 "\n",""); 2143 if (!--left) 2144 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2145 "",eni_dev->tx_mult,eni_dev->rx_mult); 2146 for (i = 0; i < NR_CHAN; i++) { 2147 struct eni_tx *tx = eni_dev->tx+i; 2148 2149 if (!tx->send) continue; 2150 if (!--left) { 2151 return sprintf(page,"tx[%d]: 0x%ld-0x%ld " 2152 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2153 (unsigned long) (tx->send - eni_dev->ram), 2154 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2155 tx->reserved,tx->shaping, 2156 tx == eni_dev->ubr ? " (UBR)" : ""); 2157 } 2158 if (--left) continue; 2159 return sprintf(page,"%10sbacklog %u packets\n","", 2160 skb_queue_len(&tx->backlog)); 2161 } 2162 read_lock(&vcc_sklist_lock); 2163 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2164 struct hlist_head *head = &vcc_hash[i]; 2165 2166 sk_for_each(s, node, head) { 2167 struct eni_vcc *eni_vcc; 2168 int length; 2169 2170 vcc = atm_sk(s); 2171 if (vcc->dev != dev) 2172 continue; 2173 eni_vcc = ENI_VCC(vcc); 2174 if (--left) continue; 2175 length = sprintf(page,"vcc %4d: ",vcc->vci); 2176 if (eni_vcc->rx) { 2177 length += sprintf(page+length,"0x%ld-0x%ld " 2178 "(%6ld bytes)", 2179 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2180 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2181 eni_vcc->words*4); 2182 if (eni_vcc->tx) length += sprintf(page+length,", "); 2183 } 2184 if (eni_vcc->tx) 2185 length += sprintf(page+length,"tx[%d], txing %d bytes", 2186 eni_vcc->tx->index,eni_vcc->txing); 2187 page[length] = '\n'; 2188 read_unlock(&vcc_sklist_lock); 2189 return length+1; 2190 } 2191 } 2192 read_unlock(&vcc_sklist_lock); 2193 for (i = 0; i < eni_dev->free_len; i++) { 2194 struct eni_free *fe = eni_dev->free_list+i; 2195 unsigned long offset; 2196 2197 if (--left) continue; 2198 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2199 return sprintf(page,"free %p-%p (%6d bytes)\n", 2200 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2201 1 << fe->order); 2202 } 2203 return 0; 2204 } 2205 2206 2207 static const struct atmdev_ops ops = { 2208 .open = eni_open, 2209 .close = eni_close, 2210 .ioctl = eni_ioctl, 2211 .getsockopt = eni_getsockopt, 2212 .setsockopt = eni_setsockopt, 2213 .send = eni_send, 2214 .phy_put = eni_phy_put, 2215 .phy_get = eni_phy_get, 2216 .change_qos = eni_change_qos, 2217 .proc_read = eni_proc_read 2218 }; 2219 2220 2221 static int __devinit eni_init_one(struct pci_dev *pci_dev, 2222 const struct pci_device_id *ent) 2223 { 2224 struct atm_dev *dev; 2225 struct eni_dev *eni_dev; 2226 int error = -ENOMEM; 2227 2228 DPRINTK("eni_init_one\n"); 2229 2230 if (pci_enable_device(pci_dev)) { 2231 error = -EIO; 2232 goto out0; 2233 } 2234 2235 eni_dev = kmalloc(sizeof(struct eni_dev),GFP_KERNEL); 2236 if (!eni_dev) goto out0; 2237 if (!cpu_zeroes) { 2238 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE, 2239 &zeroes); 2240 if (!cpu_zeroes) goto out1; 2241 } 2242 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); 2243 if (!dev) goto out2; 2244 pci_set_drvdata(pci_dev, dev); 2245 eni_dev->pci_dev = pci_dev; 2246 dev->dev_data = eni_dev; 2247 eni_dev->asic = ent->driver_data; 2248 error = eni_do_init(dev); 2249 if (error) goto out3; 2250 error = eni_start(dev); 2251 if (error) goto out3; 2252 eni_dev->more = eni_boards; 2253 eni_boards = dev; 2254 return 0; 2255 out3: 2256 atm_dev_deregister(dev); 2257 out2: 2258 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes); 2259 cpu_zeroes = NULL; 2260 out1: 2261 kfree(eni_dev); 2262 out0: 2263 return error; 2264 } 2265 2266 2267 static struct pci_device_id eni_pci_tbl[] = { 2268 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, 2269 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, 2270 { 0, } 2271 }; 2272 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2273 2274 2275 static void __devexit eni_remove_one(struct pci_dev *pci_dev) 2276 { 2277 /* grrr */ 2278 } 2279 2280 2281 static struct pci_driver eni_driver = { 2282 .name = DEV_LABEL, 2283 .id_table = eni_pci_tbl, 2284 .probe = eni_init_one, 2285 .remove = __devexit_p(eni_remove_one), 2286 }; 2287 2288 2289 static int __init eni_init(void) 2290 { 2291 struct sk_buff *skb; /* dummy for sizeof */ 2292 2293 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) { 2294 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n", 2295 sizeof(skb->cb),sizeof(struct eni_skb_prv)); 2296 return -EIO; 2297 } 2298 return pci_register_driver(&eni_driver); 2299 } 2300 2301 2302 module_init(eni_init); 2303 /* @@@ since exit routine not defined, this module can not be unloaded */ 2304 2305 MODULE_LICENSE("GPL"); 2306