1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ 2 3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 4 5 6 #include <linux/module.h> 7 #include <linux/config.h> 8 #include <linux/kernel.h> 9 #include <linux/mm.h> 10 #include <linux/pci.h> 11 #include <linux/errno.h> 12 #include <linux/atm.h> 13 #include <linux/atmdev.h> 14 #include <linux/sonet.h> 15 #include <linux/skbuff.h> 16 #include <linux/time.h> 17 #include <linux/delay.h> 18 #include <linux/uio.h> 19 #include <linux/init.h> 20 #include <linux/atm_eni.h> 21 #include <linux/bitops.h> 22 #include <asm/system.h> 23 #include <asm/io.h> 24 #include <asm/atomic.h> 25 #include <asm/uaccess.h> 26 #include <asm/string.h> 27 #include <asm/byteorder.h> 28 29 #include "tonga.h" 30 #include "midway.h" 31 #include "suni.h" 32 #include "eni.h" 33 34 #if !defined(__i386__) && !defined(__x86_64__) 35 #ifndef ioremap_nocache 36 #define ioremap_nocache(X,Y) ioremap(X,Y) 37 #endif 38 #endif 39 40 /* 41 * TODO: 42 * 43 * Show stoppers 44 * none 45 * 46 * Minor 47 * - OAM support 48 * - fix bugs listed below 49 */ 50 51 /* 52 * KNOWN BUGS: 53 * 54 * - may run into JK-JK bug and deadlock 55 * - should allocate UBR channel first 56 * - buffer space allocation algorithm is stupid 57 * (RX: should be maxSDU+maxdelay*rate 58 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 59 * - doesn't support OAM cells 60 * - eni_put_free may hang if not putting memory fragments that _complete_ 61 * 2^n block (never happens in real life, though) 62 */ 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_set_timestamp(skb, &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 do_gettimeofday(&ENI_VCC(vcc)->timestamp); 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 memset(eni_dev->rx_map,0,PAGE_SIZE); 917 eni_dev->rx_mult = DEFAULT_RX_MULT; 918 eni_dev->fast = eni_dev->last_fast = NULL; 919 eni_dev->slow = eni_dev->last_slow = NULL; 920 init_waitqueue_head(&eni_dev->rx_wait); 921 skb_queue_head_init(&eni_dev->rx_queue); 922 eni_dev->serv_read = eni_in(MID_SERV_WRITE); 923 eni_out(0,MID_DMA_WR_RX); 924 return 0; 925 } 926 927 928 /*----------------------------------- TX ------------------------------------*/ 929 930 931 enum enq_res { enq_ok,enq_next,enq_jam }; 932 933 934 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 935 u32 size) 936 { 937 u32 init,words; 938 939 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 940 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 941 #if 0 /* don't complain anymore */ 942 if (paddr & 3) 943 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 944 if (size & 3) 945 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 946 #endif 947 if (paddr & 3) { 948 init = 4-(paddr & 3); 949 if (init > size || size < 7) init = size; 950 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 951 (unsigned long) paddr,init,size); 952 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 953 (chan << MID_DMA_CHAN_SHIFT); 954 dma[(*j)++] = paddr; 955 paddr += init; 956 size -= init; 957 } 958 words = size >> 2; 959 size &= 3; 960 if (words && (paddr & 31)) { 961 init = 8-((paddr & 31) >> 2); 962 if (init > words) init = words; 963 DPRINTK("put_dma: %lx DMA: %d/%d words\n", 964 (unsigned long) paddr,init,words); 965 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 966 (chan << MID_DMA_CHAN_SHIFT); 967 dma[(*j)++] = paddr; 968 paddr += init << 2; 969 words -= init; 970 } 971 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 972 if (words & ~15) { 973 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 974 (unsigned long) paddr,words >> 4,words); 975 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 976 | (chan << MID_DMA_CHAN_SHIFT); 977 dma[(*j)++] = paddr; 978 paddr += (words & ~15) << 2; 979 words &= 15; 980 } 981 #endif 982 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 983 if (words & ~7) { 984 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 985 (unsigned long) paddr,words >> 3,words); 986 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 987 | (chan << MID_DMA_CHAN_SHIFT); 988 dma[(*j)++] = paddr; 989 paddr += (words & ~7) << 2; 990 words &= 7; 991 } 992 #endif 993 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 994 if (words & ~3) { 995 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 996 (unsigned long) paddr,words >> 2,words); 997 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 998 | (chan << MID_DMA_CHAN_SHIFT); 999 dma[(*j)++] = paddr; 1000 paddr += (words & ~3) << 2; 1001 words &= 3; 1002 } 1003 #endif 1004 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 1005 if (words & ~1) { 1006 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 1007 (unsigned long) paddr,words >> 1,words); 1008 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 1009 | (chan << MID_DMA_CHAN_SHIFT); 1010 dma[(*j)++] = paddr; 1011 paddr += (words & ~1) << 2; 1012 words &= 1; 1013 } 1014 #endif 1015 if (words) { 1016 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 1017 words); 1018 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 1019 (chan << MID_DMA_CHAN_SHIFT); 1020 dma[(*j)++] = paddr; 1021 paddr += words << 2; 1022 } 1023 if (size) { 1024 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 1025 size); 1026 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 1027 (chan << MID_DMA_CHAN_SHIFT); 1028 dma[(*j)++] = paddr; 1029 } 1030 } 1031 1032 1033 static enum enq_res do_tx(struct sk_buff *skb) 1034 { 1035 struct atm_vcc *vcc; 1036 struct eni_dev *eni_dev; 1037 struct eni_vcc *eni_vcc; 1038 struct eni_tx *tx; 1039 dma_addr_t paddr; 1040 u32 dma_rd,dma_wr; 1041 u32 size; /* in words */ 1042 int aal5,dma_size,i,j; 1043 1044 DPRINTK(">do_tx\n"); 1045 NULLCHECK(skb); 1046 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1047 vcc = ATM_SKB(skb)->vcc; 1048 NULLCHECK(vcc); 1049 eni_dev = ENI_DEV(vcc->dev); 1050 NULLCHECK(eni_dev); 1051 eni_vcc = ENI_VCC(vcc); 1052 tx = eni_vcc->tx; 1053 NULLCHECK(tx); 1054 #if 0 /* Enable this for testing with the "align" program */ 1055 { 1056 unsigned int hack = *((char *) skb->data)-'0'; 1057 1058 if (hack < 8) { 1059 skb->data += hack; 1060 skb->len -= hack; 1061 } 1062 } 1063 #endif 1064 #if 0 /* should work now */ 1065 if ((unsigned long) skb->data & 3) 1066 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1067 "TX data\n",vcc->dev->number,vcc->vci); 1068 #endif 1069 /* 1070 * Potential future IP speedup: make hard_header big enough to put 1071 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1072 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1073 */ 1074 1075 aal5 = vcc->qos.aal == ATM_AAL5; 1076 /* check space in buffer */ 1077 if (!aal5) 1078 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1079 /* cell without HEC plus segmentation header (includes 1080 four-byte cell header) */ 1081 else { 1082 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1083 /* add AAL5 trailer */ 1084 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1085 /* add segmentation header */ 1086 } 1087 /* 1088 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1089 * to the read pointer ? TX_GAP means to leave some space for what 1090 * the manual calls "too close". 1091 */ 1092 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1093 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1094 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1095 vcc->dev->number,size); 1096 return enq_next; 1097 } 1098 /* check DMA */ 1099 dma_wr = eni_in(MID_DMA_WR_TX); 1100 dma_rd = eni_in(MID_DMA_RD_TX); 1101 dma_size = 3; /* JK for descriptor and final fill, plus final size 1102 mis-alignment fix */ 1103 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1104 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1105 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1106 if (dma_size > TX_DMA_BUF) { 1107 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1108 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1109 } 1110 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1111 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1112 dma_size) { 1113 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1114 vcc->dev->number); 1115 return enq_jam; 1116 } 1117 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 1118 PCI_DMA_TODEVICE); 1119 ENI_PRV_PADDR(skb) = paddr; 1120 /* prepare DMA queue entries */ 1121 j = 0; 1122 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1123 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1124 MID_DT_JK; 1125 j++; 1126 if (!skb_shinfo(skb)->nr_frags) 1127 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1128 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1129 else { 1130 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1131 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1132 if (i == -1) 1133 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1134 skb->data, 1135 skb->len - skb->data_len); 1136 else 1137 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1138 skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset, 1139 skb_shinfo(skb)->frags[i].size); 1140 } 1141 if (skb->len & 3) 1142 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3)); 1143 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1144 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1145 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1146 MID_DMA_END | MID_DT_JK; 1147 j++; 1148 DPRINTK("DMA at end: %d\n",j); 1149 /* store frame */ 1150 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1151 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1152 (tx->resolution << MID_SEG_RATE_SHIFT) | 1153 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1154 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1155 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1156 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1157 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1158 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1159 DPRINTK("size: %d, len:%d\n",size,skb->len); 1160 if (aal5) 1161 writel(skb->len,tx->send+ 1162 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1163 j = j >> 1; 1164 for (i = 0; i < j; i++) { 1165 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1166 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1167 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1168 } 1169 ENI_PRV_POS(skb) = tx->tx_pos; 1170 ENI_PRV_SIZE(skb) = size; 1171 ENI_VCC(vcc)->txing += size; 1172 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1173 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1174 eni_out(dma_wr,MID_DMA_WR_TX); 1175 skb_queue_tail(&eni_dev->tx_queue,skb); 1176 queued++; 1177 return enq_ok; 1178 } 1179 1180 1181 static void poll_tx(struct atm_dev *dev) 1182 { 1183 struct eni_tx *tx; 1184 struct sk_buff *skb; 1185 enum enq_res res; 1186 int i; 1187 1188 DPRINTK(">poll_tx\n"); 1189 for (i = NR_CHAN-1; i >= 0; i--) { 1190 tx = &ENI_DEV(dev)->tx[i]; 1191 if (tx->send) 1192 while ((skb = skb_dequeue(&tx->backlog))) { 1193 res = do_tx(skb); 1194 if (res == enq_ok) continue; 1195 DPRINTK("re-queuing TX PDU\n"); 1196 skb_queue_head(&tx->backlog,skb); 1197 requeued++; 1198 if (res == enq_jam) return; 1199 break; 1200 } 1201 } 1202 } 1203 1204 1205 static void dequeue_tx(struct atm_dev *dev) 1206 { 1207 struct eni_dev *eni_dev; 1208 struct atm_vcc *vcc; 1209 struct sk_buff *skb; 1210 struct eni_tx *tx; 1211 1212 NULLCHECK(dev); 1213 eni_dev = ENI_DEV(dev); 1214 NULLCHECK(eni_dev); 1215 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1216 vcc = ATM_SKB(skb)->vcc; 1217 NULLCHECK(vcc); 1218 tx = ENI_VCC(vcc)->tx; 1219 NULLCHECK(ENI_VCC(vcc)->tx); 1220 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1221 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1222 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1223 eni_in(MID_TX_DESCRSTART(tx->index))) { 1224 skb_queue_head(&eni_dev->tx_queue,skb); 1225 break; 1226 } 1227 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1228 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 1229 PCI_DMA_TODEVICE); 1230 if (vcc->pop) vcc->pop(vcc,skb); 1231 else dev_kfree_skb_irq(skb); 1232 atomic_inc(&vcc->stats->tx); 1233 wake_up(&eni_dev->tx_wait); 1234 dma_complete++; 1235 } 1236 } 1237 1238 1239 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1240 { 1241 int i; 1242 1243 for (i = !ubr; i < NR_CHAN; i++) 1244 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1245 return NULL; 1246 } 1247 1248 1249 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1250 int *res,int unlimited) 1251 { 1252 static const int pre_div[] = { 4,16,128,2048 }; 1253 /* 2^(((x+2)^2-(x+2))/2+1) */ 1254 1255 if (unlimited) *pre = *res = 0; 1256 else { 1257 if (*pcr > 0) { 1258 int div; 1259 1260 for (*pre = 0; *pre < 3; (*pre)++) 1261 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1262 div = pre_div[*pre]**pcr; 1263 DPRINTK("min div %d\n",div); 1264 *res = TS_CLOCK/div-1; 1265 } 1266 else { 1267 int div; 1268 1269 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1270 for (*pre = 3; *pre >= 0; (*pre)--) 1271 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1272 if (*pre < 3) (*pre)++; /* else fail later */ 1273 div = pre_div[*pre]*-*pcr; 1274 DPRINTK("max div %d\n",div); 1275 *res = (TS_CLOCK+div-1)/div-1; 1276 } 1277 if (*res < 0) *res = 0; 1278 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1279 } 1280 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1281 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1282 return 0; 1283 } 1284 1285 1286 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1287 int set_rsv,int set_shp) 1288 { 1289 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1290 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1291 struct eni_tx *tx; 1292 unsigned long size; 1293 void __iomem *mem; 1294 int rate,ubr,unlimited,new_tx; 1295 int pre,res,order; 1296 int error; 1297 1298 rate = atm_pcr_goal(txtp); 1299 ubr = txtp->traffic_class == ATM_UBR; 1300 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1301 rate >= ATM_OC3_PCR); 1302 if (!unlimited) { 1303 size = txtp->max_sdu*eni_dev->tx_mult/100; 1304 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1305 MID_MAX_BUF_SIZE) 1306 size = MID_MAX_BUF_SIZE; 1307 } 1308 else { 1309 if (eni_dev->ubr) { 1310 eni_vcc->tx = eni_dev->ubr; 1311 txtp->pcr = ATM_OC3_PCR; 1312 return 0; 1313 } 1314 size = UBR_BUFFER; 1315 } 1316 new_tx = !eni_vcc->tx; 1317 mem = NULL; /* for gcc */ 1318 if (!new_tx) tx = eni_vcc->tx; 1319 else { 1320 mem = eni_alloc_mem(eni_dev,&size); 1321 if (!mem) return -ENOBUFS; 1322 tx = alloc_tx(eni_dev,unlimited); 1323 if (!tx) { 1324 eni_free_mem(eni_dev,mem,size); 1325 return -EBUSY; 1326 } 1327 DPRINTK("got chan %d\n",tx->index); 1328 tx->reserved = tx->shaping = 0; 1329 tx->send = mem; 1330 tx->words = size >> 2; 1331 skb_queue_head_init(&tx->backlog); 1332 for (order = 0; size > (1 << (order+10)); order++); 1333 eni_out((order << MID_SIZE_SHIFT) | 1334 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1335 MID_TX_PLACE(tx->index)); 1336 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1337 MID_DESCR_START; 1338 } 1339 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1340 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1341 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1342 txtp->max_pcr < rate) error = -EINVAL; 1343 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1344 error = -EINVAL; 1345 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1346 error = -EINVAL; 1347 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1348 error = -EINVAL; 1349 if (error) { 1350 if (new_tx) { 1351 tx->send = NULL; 1352 eni_free_mem(eni_dev,mem,size); 1353 } 1354 return error; 1355 } 1356 txtp->pcr = rate; 1357 if (set_rsv && !ubr) { 1358 eni_dev->tx_bw += tx->reserved; 1359 tx->reserved = rate; 1360 eni_dev->tx_bw -= rate; 1361 } 1362 if (set_shp || (unlimited && new_tx)) { 1363 if (unlimited && new_tx) eni_dev->ubr = tx; 1364 tx->prescaler = pre; 1365 tx->resolution = res; 1366 tx->shaping = rate; 1367 } 1368 if (set_shp) eni_vcc->tx = tx; 1369 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1370 return 0; 1371 } 1372 1373 1374 static int open_tx_first(struct atm_vcc *vcc) 1375 { 1376 ENI_VCC(vcc)->tx = NULL; 1377 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1378 ENI_VCC(vcc)->txing = 0; 1379 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1380 } 1381 1382 1383 static int open_tx_second(struct atm_vcc *vcc) 1384 { 1385 return 0; /* nothing to do */ 1386 } 1387 1388 1389 static void close_tx(struct atm_vcc *vcc) 1390 { 1391 DECLARE_WAITQUEUE(wait,current); 1392 struct eni_dev *eni_dev; 1393 struct eni_vcc *eni_vcc; 1394 1395 eni_vcc = ENI_VCC(vcc); 1396 if (!eni_vcc->tx) return; 1397 eni_dev = ENI_DEV(vcc->dev); 1398 /* wait for TX queue to drain */ 1399 DPRINTK("eni_close: waiting for TX ...\n"); 1400 add_wait_queue(&eni_dev->tx_wait,&wait); 1401 set_current_state(TASK_UNINTERRUPTIBLE); 1402 for (;;) { 1403 int txing; 1404 1405 tasklet_disable(&eni_dev->task); 1406 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1407 tasklet_enable(&eni_dev->task); 1408 if (!txing) break; 1409 DPRINTK("%d TX left\n",eni_vcc->txing); 1410 schedule(); 1411 set_current_state(TASK_UNINTERRUPTIBLE); 1412 } 1413 set_current_state(TASK_RUNNING); 1414 remove_wait_queue(&eni_dev->tx_wait,&wait); 1415 if (eni_vcc->tx != eni_dev->ubr) { 1416 /* 1417 * Looping a few times in here is probably far cheaper than 1418 * keeping track of TX completions all the time, so let's poll 1419 * a bit ... 1420 */ 1421 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1422 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1423 schedule(); 1424 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1425 eni_vcc->tx->send = NULL; 1426 eni_dev->tx_bw += eni_vcc->tx->reserved; 1427 } 1428 eni_vcc->tx = NULL; 1429 } 1430 1431 1432 static int start_tx(struct atm_dev *dev) 1433 { 1434 struct eni_dev *eni_dev; 1435 int i; 1436 1437 eni_dev = ENI_DEV(dev); 1438 eni_dev->lost = 0; 1439 eni_dev->tx_bw = ATM_OC3_PCR; 1440 eni_dev->tx_mult = DEFAULT_TX_MULT; 1441 init_waitqueue_head(&eni_dev->tx_wait); 1442 eni_dev->ubr = NULL; 1443 skb_queue_head_init(&eni_dev->tx_queue); 1444 eni_out(0,MID_DMA_WR_TX); 1445 for (i = 0; i < NR_CHAN; i++) { 1446 eni_dev->tx[i].send = NULL; 1447 eni_dev->tx[i].index = i; 1448 } 1449 return 0; 1450 } 1451 1452 1453 /*--------------------------------- common ----------------------------------*/ 1454 1455 1456 #if 0 /* may become useful again when tuning things */ 1457 1458 static void foo(void) 1459 { 1460 printk(KERN_INFO 1461 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1462 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1463 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1464 rx_enqueued,rx_dequeued,putting,pushed); 1465 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1466 } 1467 1468 #endif 1469 1470 1471 static void bug_int(struct atm_dev *dev,unsigned long reason) 1472 { 1473 struct eni_dev *eni_dev; 1474 1475 DPRINTK(">bug_int\n"); 1476 eni_dev = ENI_DEV(dev); 1477 if (reason & MID_DMA_ERR_ACK) 1478 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1479 "error\n",dev->number); 1480 if (reason & MID_TX_IDENT_MISM) 1481 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1482 "mismatch\n",dev->number); 1483 if (reason & MID_TX_DMA_OVFL) 1484 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1485 "overflow\n",dev->number); 1486 EVENT("---dump ends here---\n",0,0); 1487 printk(KERN_NOTICE "---recent events---\n"); 1488 event_dump(); 1489 } 1490 1491 1492 static irqreturn_t eni_int(int irq,void *dev_id,struct pt_regs *regs) 1493 { 1494 struct atm_dev *dev; 1495 struct eni_dev *eni_dev; 1496 u32 reason; 1497 1498 DPRINTK(">eni_int\n"); 1499 dev = dev_id; 1500 eni_dev = ENI_DEV(dev); 1501 reason = eni_in(MID_ISA); 1502 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1503 /* 1504 * Must handle these two right now, because reading ISA doesn't clear 1505 * them, so they re-occur and we never make it to the tasklet. Since 1506 * they're rare, we don't mind the occasional invocation of eni_tasklet 1507 * with eni_dev->events == 0. 1508 */ 1509 if (reason & MID_STAT_OVFL) { 1510 EVENT("stat overflow\n",0,0); 1511 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1512 } 1513 if (reason & MID_SUNI_INT) { 1514 EVENT("SUNI int\n",0,0); 1515 dev->phy->interrupt(dev); 1516 #if 0 1517 foo(); 1518 #endif 1519 } 1520 spin_lock(&eni_dev->lock); 1521 eni_dev->events |= reason; 1522 spin_unlock(&eni_dev->lock); 1523 tasklet_schedule(&eni_dev->task); 1524 return IRQ_HANDLED; 1525 } 1526 1527 1528 static void eni_tasklet(unsigned long data) 1529 { 1530 struct atm_dev *dev = (struct atm_dev *) data; 1531 struct eni_dev *eni_dev = ENI_DEV(dev); 1532 unsigned long flags; 1533 u32 events; 1534 1535 DPRINTK("eni_tasklet (dev %p)\n",dev); 1536 spin_lock_irqsave(&eni_dev->lock,flags); 1537 events = xchg(&eni_dev->events,0); 1538 spin_unlock_irqrestore(&eni_dev->lock,flags); 1539 if (events & MID_RX_DMA_COMPLETE) { 1540 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1541 dequeue_rx(dev); 1542 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1543 poll_rx(dev); 1544 EVENT("poll_rx done\n",0,0); 1545 /* poll_tx ? */ 1546 } 1547 if (events & MID_SERVICE) { 1548 EVENT("INT: service, starting get_service\n",0,0); 1549 get_service(dev); 1550 EVENT("get_service done, starting poll_rx\n",0,0); 1551 poll_rx(dev); 1552 EVENT("poll_rx done\n",0,0); 1553 } 1554 if (events & MID_TX_DMA_COMPLETE) { 1555 EVENT("INT: TX DMA COMPLETE\n",0,0); 1556 dequeue_tx(dev); 1557 } 1558 if (events & MID_TX_COMPLETE) { 1559 EVENT("INT: TX COMPLETE\n",0,0); 1560 tx_complete++; 1561 wake_up(&eni_dev->tx_wait); 1562 /* poll_rx ? */ 1563 } 1564 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1565 EVENT("bug interrupt\n",0,0); 1566 bug_int(dev,events); 1567 } 1568 poll_tx(dev); 1569 } 1570 1571 1572 /*--------------------------------- entries ---------------------------------*/ 1573 1574 1575 static const char *media_name[] __devinitdata = { 1576 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1577 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1578 "TAXI","09?", "10?", "11?", /* 8-11 */ 1579 "12?", "13?", "14?", "15?", /* 12-15 */ 1580 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1581 "UTP", "21?", "22?", "23?", /* 20-23 */ 1582 "24?", "25?", "26?", "27?", /* 24-27 */ 1583 "28?", "29?", "30?", "31?" /* 28-31 */ 1584 }; 1585 1586 1587 #define SET_SEPROM \ 1588 ({ if (!error && !pci_error) { \ 1589 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1590 udelay(10); /* 10 usecs */ \ 1591 } }) 1592 #define GET_SEPROM \ 1593 ({ if (!error && !pci_error) { \ 1594 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1595 udelay(10); /* 10 usecs */ \ 1596 } }) 1597 1598 1599 static int __devinit get_esi_asic(struct atm_dev *dev) 1600 { 1601 struct eni_dev *eni_dev; 1602 unsigned char tonga; 1603 int error,failed,pci_error; 1604 int address,i,j; 1605 1606 eni_dev = ENI_DEV(dev); 1607 error = pci_error = 0; 1608 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1609 SET_SEPROM; 1610 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1611 /* start operation */ 1612 tonga |= SEPROM_DATA; 1613 SET_SEPROM; 1614 tonga |= SEPROM_CLK; 1615 SET_SEPROM; 1616 tonga &= ~SEPROM_DATA; 1617 SET_SEPROM; 1618 tonga &= ~SEPROM_CLK; 1619 SET_SEPROM; 1620 /* send address */ 1621 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1622 for (j = 7; j >= 0; j--) { 1623 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1624 tonga & ~SEPROM_DATA; 1625 SET_SEPROM; 1626 tonga |= SEPROM_CLK; 1627 SET_SEPROM; 1628 tonga &= ~SEPROM_CLK; 1629 SET_SEPROM; 1630 } 1631 /* get ack */ 1632 tonga |= SEPROM_DATA; 1633 SET_SEPROM; 1634 tonga |= SEPROM_CLK; 1635 SET_SEPROM; 1636 GET_SEPROM; 1637 failed = tonga & SEPROM_DATA; 1638 tonga &= ~SEPROM_CLK; 1639 SET_SEPROM; 1640 tonga |= SEPROM_DATA; 1641 SET_SEPROM; 1642 if (failed) error = -EIO; 1643 else { 1644 dev->esi[i] = 0; 1645 for (j = 7; j >= 0; j--) { 1646 dev->esi[i] <<= 1; 1647 tonga |= SEPROM_DATA; 1648 SET_SEPROM; 1649 tonga |= SEPROM_CLK; 1650 SET_SEPROM; 1651 GET_SEPROM; 1652 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1653 tonga &= ~SEPROM_CLK; 1654 SET_SEPROM; 1655 tonga |= SEPROM_DATA; 1656 SET_SEPROM; 1657 } 1658 /* get ack */ 1659 tonga |= SEPROM_DATA; 1660 SET_SEPROM; 1661 tonga |= SEPROM_CLK; 1662 SET_SEPROM; 1663 GET_SEPROM; 1664 if (!(tonga & SEPROM_DATA)) error = -EIO; 1665 tonga &= ~SEPROM_CLK; 1666 SET_SEPROM; 1667 tonga |= SEPROM_DATA; 1668 SET_SEPROM; 1669 } 1670 /* stop operation */ 1671 tonga &= ~SEPROM_DATA; 1672 SET_SEPROM; 1673 tonga |= SEPROM_CLK; 1674 SET_SEPROM; 1675 tonga |= SEPROM_DATA; 1676 SET_SEPROM; 1677 } 1678 if (pci_error) { 1679 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1680 "(0x%02x)\n",dev->number,pci_error); 1681 error = -EIO; 1682 } 1683 return error; 1684 } 1685 1686 1687 #undef SET_SEPROM 1688 #undef GET_SEPROM 1689 1690 1691 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1692 { 1693 void __iomem *mac_base; 1694 int i; 1695 1696 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1697 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1698 return 0; 1699 } 1700 1701 1702 static int __devinit eni_do_init(struct atm_dev *dev) 1703 { 1704 struct midway_eprom __iomem *eprom; 1705 struct eni_dev *eni_dev; 1706 struct pci_dev *pci_dev; 1707 unsigned long real_base; 1708 void __iomem *base; 1709 unsigned char revision; 1710 int error,i,last; 1711 1712 DPRINTK(">eni_init\n"); 1713 dev->ci_range.vpi_bits = 0; 1714 dev->ci_range.vci_bits = NR_VCI_LD; 1715 dev->link_rate = ATM_OC3_PCR; 1716 eni_dev = ENI_DEV(dev); 1717 pci_dev = eni_dev->pci_dev; 1718 real_base = pci_resource_start(pci_dev, 0); 1719 eni_dev->irq = pci_dev->irq; 1720 error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision); 1721 if (error) { 1722 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n", 1723 dev->number,error); 1724 return -EINVAL; 1725 } 1726 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1727 PCI_COMMAND_MEMORY | 1728 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1729 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1730 "(0x%02x)\n",dev->number,error); 1731 return -EIO; 1732 } 1733 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1734 dev->number,revision,real_base,eni_dev->irq); 1735 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 1736 printk("\n"); 1737 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1738 "mapping\n",dev->number); 1739 return error; 1740 } 1741 eni_dev->base_diff = real_base - (unsigned long) base; 1742 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1743 if (!eni_dev->asic) { 1744 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1745 if (readl(&eprom->magic) != ENI155_MAGIC) { 1746 printk("\n"); 1747 printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad " 1748 "magic - expected 0x%x, got 0x%x\n",dev->number, 1749 ENI155_MAGIC,(unsigned) readl(&eprom->magic)); 1750 return -EINVAL; 1751 } 1752 } 1753 eni_dev->phy = base+PHY_BASE; 1754 eni_dev->reg = base+REG_BASE; 1755 eni_dev->ram = base+RAM_BASE; 1756 last = MAP_MAX_SIZE-RAM_BASE; 1757 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1758 writel(0x55555555,eni_dev->ram+i); 1759 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1760 else { 1761 writel(0xAAAAAAAA,eni_dev->ram+i); 1762 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1763 else writel(i,eni_dev->ram+i); 1764 } 1765 } 1766 for (i = 0; i < last; i += RAM_INCREMENT) 1767 if (readl(eni_dev->ram+i) != i) break; 1768 eni_dev->mem = i; 1769 memset_io(eni_dev->ram,0,eni_dev->mem); 1770 /* TODO: should shrink allocation now */ 1771 printk("mem=%dkB (",eni_dev->mem >> 10); 1772 /* TODO: check for non-SUNI, check for TAXI ? */ 1773 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1774 printk(")\n"); 1775 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1776 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1777 return -EINVAL; 1778 } 1779 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1780 if (error) return error; 1781 for (i = 0; i < ESI_LEN; i++) 1782 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1783 printk(")\n"); 1784 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1785 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1786 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]); 1787 return suni_init(dev); 1788 } 1789 1790 1791 static int __devinit eni_start(struct atm_dev *dev) 1792 { 1793 struct eni_dev *eni_dev; 1794 1795 void __iomem *buf; 1796 unsigned long buffer_mem; 1797 int error; 1798 1799 DPRINTK(">eni_start\n"); 1800 eni_dev = ENI_DEV(dev); 1801 if (request_irq(eni_dev->irq,&eni_int,SA_SHIRQ,DEV_LABEL,dev)) { 1802 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1803 dev->number,eni_dev->irq); 1804 error = -EAGAIN; 1805 goto out; 1806 } 1807 pci_set_master(eni_dev->pci_dev); 1808 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1809 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1810 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1811 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1812 "master (0x%02x)\n",dev->number,error); 1813 goto free_irq; 1814 } 1815 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1816 END_SWAP_DMA))) { 1817 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1818 "(0x%02x)\n",dev->number,error); 1819 goto free_irq; 1820 } 1821 /* determine addresses of internal tables */ 1822 eni_dev->vci = eni_dev->ram; 1823 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1824 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1825 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1826 buf = eni_dev->service+NR_SERVICE*4; 1827 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1828 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1829 eni_dev->service,buf); 1830 spin_lock_init(&eni_dev->lock); 1831 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1832 eni_dev->events = 0; 1833 /* initialize memory management */ 1834 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1835 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1836 eni_dev->free_list = (struct eni_free *) kmalloc( 1837 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL); 1838 if (!eni_dev->free_list) { 1839 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1840 dev->number); 1841 error = -ENOMEM; 1842 goto free_irq; 1843 } 1844 eni_dev->free_len = 0; 1845 eni_put_free(eni_dev,buf,buffer_mem); 1846 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1847 /* 1848 * byte_addr free (k) 1849 * 0x00000000 512 VCI table 1850 * 0x00004000 496 RX DMA 1851 * 0x00005000 492 TX DMA 1852 * 0x00006000 488 service list 1853 * 0x00007000 484 buffers 1854 * 0x00080000 0 end (512kB) 1855 */ 1856 eni_out(0xffffffff,MID_IE); 1857 error = start_tx(dev); 1858 if (error) goto free_list; 1859 error = start_rx(dev); 1860 if (error) goto free_list; 1861 error = dev->phy->start(dev); 1862 if (error) goto free_list; 1863 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1864 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1865 MID_MC_S); 1866 /* Tonga uses SBus INTReq1 */ 1867 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1868 return 0; 1869 1870 free_list: 1871 kfree(eni_dev->free_list); 1872 1873 free_irq: 1874 free_irq(eni_dev->irq, eni_dev); 1875 1876 out: 1877 return error; 1878 } 1879 1880 1881 static void eni_close(struct atm_vcc *vcc) 1882 { 1883 DPRINTK(">eni_close\n"); 1884 if (!ENI_VCC(vcc)) return; 1885 clear_bit(ATM_VF_READY,&vcc->flags); 1886 close_rx(vcc); 1887 close_tx(vcc); 1888 DPRINTK("eni_close: done waiting\n"); 1889 /* deallocate memory */ 1890 kfree(ENI_VCC(vcc)); 1891 vcc->dev_data = NULL; 1892 clear_bit(ATM_VF_ADDR,&vcc->flags); 1893 /*foo();*/ 1894 } 1895 1896 1897 static int eni_open(struct atm_vcc *vcc) 1898 { 1899 struct eni_dev *eni_dev; 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 eni_dev = ENI_DEV(vcc->dev); 1910 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1911 set_bit(ATM_VF_ADDR,&vcc->flags); 1912 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1913 return -EINVAL; 1914 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1915 vcc->vci); 1916 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1917 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1918 if (!eni_vcc) return -ENOMEM; 1919 vcc->dev_data = eni_vcc; 1920 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1921 if ((error = open_rx_first(vcc))) { 1922 eni_close(vcc); 1923 return error; 1924 } 1925 if ((error = open_tx_first(vcc))) { 1926 eni_close(vcc); 1927 return error; 1928 } 1929 } 1930 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1931 if ((error = open_rx_second(vcc))) { 1932 eni_close(vcc); 1933 return error; 1934 } 1935 if ((error = open_tx_second(vcc))) { 1936 eni_close(vcc); 1937 return error; 1938 } 1939 set_bit(ATM_VF_READY,&vcc->flags); 1940 /* should power down SUNI while !ref_count @@@ */ 1941 return 0; 1942 } 1943 1944 1945 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1946 { 1947 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1948 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1949 struct sk_buff *skb; 1950 int error,rate,rsv,shp; 1951 1952 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1953 if (tx == eni_dev->ubr) return -EBADFD; 1954 rate = atm_pcr_goal(&qos->txtp); 1955 if (rate < 0) rate = -rate; 1956 rsv = shp = 0; 1957 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1958 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1959 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1960 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1961 if (!rsv && !shp) return 0; 1962 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1963 if (error) return error; 1964 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1965 /* 1966 * Walk through the send buffer and patch the rate information in all 1967 * segmentation buffer descriptors of this VCC. 1968 */ 1969 tasklet_disable(&eni_dev->task); 1970 skb_queue_walk(&eni_dev->tx_queue, skb) { 1971 void __iomem *dsc; 1972 1973 if (ATM_SKB(skb)->vcc != vcc) continue; 1974 dsc = tx->send+ENI_PRV_POS(skb)*4; 1975 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1976 (tx->prescaler << MID_SEG_PR_SHIFT) | 1977 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1978 } 1979 tasklet_enable(&eni_dev->task); 1980 return 0; 1981 } 1982 1983 1984 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1985 { 1986 struct eni_dev *eni_dev = ENI_DEV(dev); 1987 1988 if (cmd == ENI_MEMDUMP) { 1989 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1990 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 1991 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 1992 dump(dev); 1993 return 0; 1994 } 1995 if (cmd == ENI_SETMULT) { 1996 struct eni_multipliers mult; 1997 1998 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1999 if (copy_from_user(&mult, arg, 2000 sizeof(struct eni_multipliers))) 2001 return -EFAULT; 2002 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2003 mult.tx > 65536 || mult.rx > 65536) 2004 return -EINVAL; 2005 if (mult.tx) eni_dev->tx_mult = mult.tx; 2006 if (mult.rx) eni_dev->rx_mult = mult.rx; 2007 return 0; 2008 } 2009 if (cmd == ATM_SETCIRANGE) { 2010 struct atm_cirange ci; 2011 2012 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2013 return -EFAULT; 2014 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2015 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2016 return 0; 2017 return -EINVAL; 2018 } 2019 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2020 return dev->phy->ioctl(dev,cmd,arg); 2021 } 2022 2023 2024 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2025 void __user *optval,int optlen) 2026 { 2027 return -EINVAL; 2028 } 2029 2030 2031 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2032 void __user *optval,int optlen) 2033 { 2034 return -EINVAL; 2035 } 2036 2037 2038 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2039 { 2040 enum enq_res res; 2041 2042 DPRINTK(">eni_send\n"); 2043 if (!ENI_VCC(vcc)->tx) { 2044 if (vcc->pop) vcc->pop(vcc,skb); 2045 else dev_kfree_skb(skb); 2046 return -EINVAL; 2047 } 2048 if (!skb) { 2049 printk(KERN_CRIT "!skb in eni_send ?\n"); 2050 if (vcc->pop) vcc->pop(vcc,skb); 2051 return -EINVAL; 2052 } 2053 if (vcc->qos.aal == ATM_AAL0) { 2054 if (skb->len != ATM_CELL_SIZE-1) { 2055 if (vcc->pop) vcc->pop(vcc,skb); 2056 else dev_kfree_skb(skb); 2057 return -EINVAL; 2058 } 2059 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2060 } 2061 submitted++; 2062 ATM_SKB(skb)->vcc = vcc; 2063 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2064 res = do_tx(skb); 2065 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2066 if (res == enq_ok) return 0; 2067 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2068 backlogged++; 2069 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2070 return 0; 2071 } 2072 2073 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2074 unsigned long addr) 2075 { 2076 writel(value,ENI_DEV(dev)->phy+addr*4); 2077 } 2078 2079 2080 2081 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2082 { 2083 return readl(ENI_DEV(dev)->phy+addr*4); 2084 } 2085 2086 2087 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2088 { 2089 struct hlist_node *node; 2090 struct sock *s; 2091 static const char *signal[] = { "LOST","unknown","okay" }; 2092 struct eni_dev *eni_dev = ENI_DEV(dev); 2093 struct atm_vcc *vcc; 2094 int left,i; 2095 2096 left = *pos; 2097 if (!left) 2098 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2099 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2100 eni_dev->mem >> 10,eni_dev->tx_bw); 2101 if (!--left) 2102 return sprintf(page,"%4sBursts: TX" 2103 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2104 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2105 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2106 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2107 " none" 2108 #endif 2109 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2110 " 16W" 2111 #endif 2112 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2113 " 8W" 2114 #endif 2115 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2116 " 4W" 2117 #endif 2118 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2119 " 2W" 2120 #endif 2121 ", RX" 2122 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2123 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2124 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2125 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2126 " none" 2127 #endif 2128 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2129 " 16W" 2130 #endif 2131 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2132 " 8W" 2133 #endif 2134 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2135 " 4W" 2136 #endif 2137 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2138 " 2W" 2139 #endif 2140 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2141 " (default)" 2142 #endif 2143 "\n",""); 2144 if (!--left) 2145 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2146 "",eni_dev->tx_mult,eni_dev->rx_mult); 2147 for (i = 0; i < NR_CHAN; i++) { 2148 struct eni_tx *tx = eni_dev->tx+i; 2149 2150 if (!tx->send) continue; 2151 if (!--left) { 2152 return sprintf(page,"tx[%d]: 0x%ld-0x%ld " 2153 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2154 (unsigned long) (tx->send - eni_dev->ram), 2155 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2156 tx->reserved,tx->shaping, 2157 tx == eni_dev->ubr ? " (UBR)" : ""); 2158 } 2159 if (--left) continue; 2160 return sprintf(page,"%10sbacklog %u packets\n","", 2161 skb_queue_len(&tx->backlog)); 2162 } 2163 read_lock(&vcc_sklist_lock); 2164 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2165 struct hlist_head *head = &vcc_hash[i]; 2166 2167 sk_for_each(s, node, head) { 2168 struct eni_vcc *eni_vcc; 2169 int length; 2170 2171 vcc = atm_sk(s); 2172 if (vcc->dev != dev) 2173 continue; 2174 eni_vcc = ENI_VCC(vcc); 2175 if (--left) continue; 2176 length = sprintf(page,"vcc %4d: ",vcc->vci); 2177 if (eni_vcc->rx) { 2178 length += sprintf(page+length,"0x%ld-0x%ld " 2179 "(%6ld bytes)", 2180 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2181 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2182 eni_vcc->words*4); 2183 if (eni_vcc->tx) length += sprintf(page+length,", "); 2184 } 2185 if (eni_vcc->tx) 2186 length += sprintf(page+length,"tx[%d], txing %d bytes", 2187 eni_vcc->tx->index,eni_vcc->txing); 2188 page[length] = '\n'; 2189 read_unlock(&vcc_sklist_lock); 2190 return length+1; 2191 } 2192 } 2193 read_unlock(&vcc_sklist_lock); 2194 for (i = 0; i < eni_dev->free_len; i++) { 2195 struct eni_free *fe = eni_dev->free_list+i; 2196 unsigned long offset; 2197 2198 if (--left) continue; 2199 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2200 return sprintf(page,"free %p-%p (%6d bytes)\n", 2201 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2202 1 << fe->order); 2203 } 2204 return 0; 2205 } 2206 2207 2208 static const struct atmdev_ops ops = { 2209 .open = eni_open, 2210 .close = eni_close, 2211 .ioctl = eni_ioctl, 2212 .getsockopt = eni_getsockopt, 2213 .setsockopt = eni_setsockopt, 2214 .send = eni_send, 2215 .phy_put = eni_phy_put, 2216 .phy_get = eni_phy_get, 2217 .change_qos = eni_change_qos, 2218 .proc_read = eni_proc_read 2219 }; 2220 2221 2222 static int __devinit eni_init_one(struct pci_dev *pci_dev, 2223 const struct pci_device_id *ent) 2224 { 2225 struct atm_dev *dev; 2226 struct eni_dev *eni_dev; 2227 int error = -ENOMEM; 2228 2229 DPRINTK("eni_init_one\n"); 2230 2231 if (pci_enable_device(pci_dev)) { 2232 error = -EIO; 2233 goto out0; 2234 } 2235 2236 eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL); 2237 if (!eni_dev) goto out0; 2238 if (!cpu_zeroes) { 2239 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE, 2240 &zeroes); 2241 if (!cpu_zeroes) goto out1; 2242 } 2243 dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL); 2244 if (!dev) goto out2; 2245 pci_set_drvdata(pci_dev, dev); 2246 eni_dev->pci_dev = pci_dev; 2247 dev->dev_data = eni_dev; 2248 eni_dev->asic = ent->driver_data; 2249 error = eni_do_init(dev); 2250 if (error) goto out3; 2251 error = eni_start(dev); 2252 if (error) goto out3; 2253 eni_dev->more = eni_boards; 2254 eni_boards = dev; 2255 return 0; 2256 out3: 2257 atm_dev_deregister(dev); 2258 out2: 2259 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes); 2260 cpu_zeroes = NULL; 2261 out1: 2262 kfree(eni_dev); 2263 out0: 2264 return error; 2265 } 2266 2267 2268 static struct pci_device_id eni_pci_tbl[] = { 2269 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID, 2270 0, 0, 0 /* FPGA */ }, 2271 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID, 2272 0, 0, 1 /* ASIC */ }, 2273 { 0, } 2274 }; 2275 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2276 2277 2278 static void __devexit eni_remove_one(struct pci_dev *pci_dev) 2279 { 2280 /* grrr */ 2281 } 2282 2283 2284 static struct pci_driver eni_driver = { 2285 .name = DEV_LABEL, 2286 .id_table = eni_pci_tbl, 2287 .probe = eni_init_one, 2288 .remove = __devexit_p(eni_remove_one), 2289 }; 2290 2291 2292 static int __init eni_init(void) 2293 { 2294 struct sk_buff *skb; /* dummy for sizeof */ 2295 2296 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) { 2297 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n", 2298 sizeof(skb->cb),sizeof(struct eni_skb_prv)); 2299 return -EIO; 2300 } 2301 return pci_register_driver(&eni_driver); 2302 } 2303 2304 2305 module_init(eni_init); 2306 /* @@@ since exit routine not defined, this module can not be unloaded */ 2307 2308 MODULE_LICENSE("GPL"); 2309