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/io.h> 23 #include <linux/atomic.h> 24 #include <linux/uaccess.h> 25 #include <asm/string.h> 26 #include <asm/byteorder.h> 27 28 #include "tonga.h" 29 #include "midway.h" 30 #include "suni.h" 31 #include "eni.h" 32 33 #if !defined(__i386__) && !defined(__x86_64__) 34 #ifndef ioremap_nocache 35 #define ioremap_nocache(X,Y) ioremap(X,Y) 36 #endif 37 #endif 38 39 /* 40 * TODO: 41 * 42 * Show stoppers 43 * none 44 * 45 * Minor 46 * - OAM support 47 * - fix bugs listed below 48 */ 49 50 /* 51 * KNOWN BUGS: 52 * 53 * - may run into JK-JK bug and deadlock 54 * - should allocate UBR channel first 55 * - buffer space allocation algorithm is stupid 56 * (RX: should be maxSDU+maxdelay*rate 57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 58 * - doesn't support OAM cells 59 * - eni_put_free may hang if not putting memory fragments that _complete_ 60 * 2^n block (never happens in real life, though) 61 */ 62 63 64 #if 0 65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 66 #else 67 #define DPRINTK(format,args...) 68 #endif 69 70 71 #ifndef CONFIG_ATM_ENI_TUNE_BURST 72 #define CONFIG_ATM_ENI_BURST_TX_8W 73 #define CONFIG_ATM_ENI_BURST_RX_4W 74 #endif 75 76 77 #ifndef CONFIG_ATM_ENI_DEBUG 78 79 80 #define NULLCHECK(x) 81 82 #define EVENT(s,a,b) 83 84 85 static void event_dump(void) 86 { 87 } 88 89 90 #else 91 92 93 /* 94 * NULL pointer checking 95 */ 96 97 #define NULLCHECK(x) \ 98 if ((unsigned long) (x) < 0x30) \ 99 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 100 101 /* 102 * Very extensive activity logging. Greatly improves bug detection speed but 103 * costs a few Mbps if enabled. 104 */ 105 106 #define EV 64 107 108 static const char *ev[EV]; 109 static unsigned long ev_a[EV],ev_b[EV]; 110 static int ec = 0; 111 112 113 static void EVENT(const char *s,unsigned long a,unsigned long b) 114 { 115 ev[ec] = s; 116 ev_a[ec] = a; 117 ev_b[ec] = b; 118 ec = (ec+1) % EV; 119 } 120 121 122 static void event_dump(void) 123 { 124 int n,i; 125 126 for (n = 0; n < EV; n++) { 127 i = (ec+n) % EV; 128 printk(KERN_NOTICE); 129 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 130 } 131 } 132 133 134 #endif /* CONFIG_ATM_ENI_DEBUG */ 135 136 137 /* 138 * NExx must not be equal at end 139 * EExx may be equal at end 140 * xxPJOK verify validity of pointer jumps 141 * xxPMOK operating on a circular buffer of "c" words 142 */ 143 144 #define NEPJOK(a0,a1,b) \ 145 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 146 #define EEPJOK(a0,a1,b) \ 147 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 148 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 149 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 150 151 152 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 153 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 154 putting = 0; 155 156 static struct atm_dev *eni_boards = NULL; 157 158 /* Read/write registers on card */ 159 #define eni_in(r) readl(eni_dev->reg+(r)*4) 160 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) 161 162 163 /*-------------------------------- utilities --------------------------------*/ 164 165 166 static void dump_mem(struct eni_dev *eni_dev) 167 { 168 int i; 169 170 for (i = 0; i < eni_dev->free_len; i++) 171 printk(KERN_DEBUG " %d: %p %d\n",i, 172 eni_dev->free_list[i].start, 173 1 << eni_dev->free_list[i].order); 174 } 175 176 177 static void dump(struct atm_dev *dev) 178 { 179 struct eni_dev *eni_dev; 180 181 int i; 182 183 eni_dev = ENI_DEV(dev); 184 printk(KERN_NOTICE "Free memory\n"); 185 dump_mem(eni_dev); 186 printk(KERN_NOTICE "TX buffers\n"); 187 for (i = 0; i < NR_CHAN; i++) 188 if (eni_dev->tx[i].send) 189 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, 190 eni_dev->tx[i].send,eni_dev->tx[i].words*4); 191 printk(KERN_NOTICE "RX buffers\n"); 192 for (i = 0; i < 1024; i++) 193 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) 194 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, 195 ENI_VCC(eni_dev->rx_map[i])->recv, 196 ENI_VCC(eni_dev->rx_map[i])->words*4); 197 printk(KERN_NOTICE "----\n"); 198 } 199 200 201 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, 202 unsigned long size) 203 { 204 struct eni_free *list; 205 int len,order; 206 207 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); 208 start += eni_dev->base_diff; 209 list = eni_dev->free_list; 210 len = eni_dev->free_len; 211 while (size) { 212 if (len >= eni_dev->free_list_size) { 213 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", 214 start,size); 215 break; 216 } 217 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); 218 if (MID_MIN_BUF_SIZE > (1 << order)) { 219 printk(KERN_CRIT "eni_put_free: order %d too small\n", 220 order); 221 break; 222 } 223 list[len].start = (void __iomem *) start; 224 list[len].order = order; 225 len++; 226 start += 1 << order; 227 size -= 1 << order; 228 } 229 eni_dev->free_len = len; 230 /*dump_mem(eni_dev);*/ 231 } 232 233 234 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) 235 { 236 struct eni_free *list; 237 void __iomem *start; 238 int len,i,order,best_order,index; 239 240 list = eni_dev->free_list; 241 len = eni_dev->free_len; 242 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; 243 if (*size > MID_MAX_BUF_SIZE) return NULL; 244 for (order = 0; (1 << order) < *size; order++) 245 ; 246 DPRINTK("trying: %ld->%d\n",*size,order); 247 best_order = 65; /* we don't have more than 2^64 of anything ... */ 248 index = 0; /* silence GCC */ 249 for (i = 0; i < len; i++) 250 if (list[i].order == order) { 251 best_order = order; 252 index = i; 253 break; 254 } 255 else if (best_order > list[i].order && list[i].order > order) { 256 best_order = list[i].order; 257 index = i; 258 } 259 if (best_order == 65) return NULL; 260 start = list[index].start-eni_dev->base_diff; 261 list[index] = list[--len]; 262 eni_dev->free_len = len; 263 *size = 1 << order; 264 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 265 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 266 memset_io(start,0,*size); /* never leak data */ 267 /*dump_mem(eni_dev);*/ 268 return start; 269 } 270 271 272 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 273 unsigned long size) 274 { 275 struct eni_free *list; 276 int len,i,order; 277 278 start += eni_dev->base_diff; 279 list = eni_dev->free_list; 280 len = eni_dev->free_len; 281 for (order = -1; size; order++) size >>= 1; 282 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 283 for (i = 0; i < len; i++) 284 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 285 list[i].order == order) { 286 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 287 list[i].start,start,1 << order,list[i].order,order); 288 list[i] = list[--len]; 289 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 290 order++; 291 i = -1; 292 continue; 293 } 294 if (len >= eni_dev->free_list_size) { 295 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 296 order); 297 return; 298 } 299 list[len].start = start; 300 list[len].order = order; 301 eni_dev->free_len = len+1; 302 /*dump_mem(eni_dev);*/ 303 } 304 305 306 /*----------------------------------- RX ------------------------------------*/ 307 308 309 #define ENI_VCC_NOS ((struct atm_vcc *) 1) 310 311 312 static void rx_ident_err(struct atm_vcc *vcc) 313 { 314 struct atm_dev *dev; 315 struct eni_dev *eni_dev; 316 struct eni_vcc *eni_vcc; 317 318 dev = vcc->dev; 319 eni_dev = ENI_DEV(dev); 320 /* immediately halt adapter */ 321 eni_out(eni_in(MID_MC_S) & 322 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 323 /* dump useful information */ 324 eni_vcc = ENI_VCC(vcc); 325 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 326 "mismatch\n",dev->number); 327 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 328 eni_vcc->rxing,eni_vcc->words); 329 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 330 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 331 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 332 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 333 eni_vcc->servicing); 334 EVENT("---dump ends here---\n",0,0); 335 printk(KERN_NOTICE "---recent events---\n"); 336 event_dump(); 337 ENI_DEV(dev)->fast = NULL; /* really stop it */ 338 ENI_DEV(dev)->slow = NULL; 339 skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 340 } 341 342 343 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 344 unsigned long skip,unsigned long size,unsigned long eff) 345 { 346 struct eni_dev *eni_dev; 347 struct eni_vcc *eni_vcc; 348 u32 dma_rd,dma_wr; 349 u32 dma[RX_DMA_BUF*2]; 350 dma_addr_t paddr; 351 unsigned long here; 352 int i,j; 353 354 eni_dev = ENI_DEV(vcc->dev); 355 eni_vcc = ENI_VCC(vcc); 356 paddr = 0; /* GCC, shut up */ 357 if (skb) { 358 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 359 DMA_FROM_DEVICE); 360 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) 361 goto dma_map_error; 362 ENI_PRV_PADDR(skb) = paddr; 363 if (paddr & 3) 364 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 365 "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 366 vcc->vci,(unsigned long) paddr); 367 ENI_PRV_SIZE(skb) = size+skip; 368 /* PDU plus descriptor */ 369 ATM_SKB(skb)->vcc = vcc; 370 } 371 j = 0; 372 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 373 here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 374 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 375 << MID_DMA_VCI_SHIFT) | MID_DT_JK; 376 j++; 377 } 378 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 379 if (!eff) size += skip; 380 else { 381 unsigned long words; 382 383 if (!size) { 384 DPRINTK("strange things happen ...\n"); 385 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 386 size,eff); 387 } 388 words = eff; 389 if (paddr & 15) { 390 unsigned long init; 391 392 init = 4-((paddr & 15) >> 2); 393 if (init > words) init = words; 394 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 395 (vcc->vci << MID_DMA_VCI_SHIFT); 396 dma[j++] = paddr; 397 paddr += init << 2; 398 words -= init; 399 } 400 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 401 if (words & ~15) { 402 dma[j++] = MID_DT_16W | ((words >> 4) << 403 MID_DMA_COUNT_SHIFT) | (vcc->vci << 404 MID_DMA_VCI_SHIFT); 405 dma[j++] = paddr; 406 paddr += (words & ~15) << 2; 407 words &= 15; 408 } 409 #endif 410 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 411 if (words & ~7) { 412 dma[j++] = MID_DT_8W | ((words >> 3) << 413 MID_DMA_COUNT_SHIFT) | (vcc->vci << 414 MID_DMA_VCI_SHIFT); 415 dma[j++] = paddr; 416 paddr += (words & ~7) << 2; 417 words &= 7; 418 } 419 #endif 420 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 421 if (words & ~3) { 422 dma[j++] = MID_DT_4W | ((words >> 2) << 423 MID_DMA_COUNT_SHIFT) | (vcc->vci << 424 MID_DMA_VCI_SHIFT); 425 dma[j++] = paddr; 426 paddr += (words & ~3) << 2; 427 words &= 3; 428 } 429 #endif 430 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 431 if (words & ~1) { 432 dma[j++] = MID_DT_2W | ((words >> 1) << 433 MID_DMA_COUNT_SHIFT) | (vcc->vci << 434 MID_DMA_VCI_SHIFT); 435 dma[j++] = paddr; 436 paddr += (words & ~1) << 2; 437 words &= 1; 438 } 439 #endif 440 if (words) { 441 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 442 | (vcc->vci << MID_DMA_VCI_SHIFT); 443 dma[j++] = paddr; 444 } 445 } 446 if (size != eff) { 447 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 448 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 449 j++; 450 } 451 if (!j || j > 2*RX_DMA_BUF) { 452 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 453 goto trouble; 454 } 455 dma[j-2] |= MID_DMA_END; 456 j = j >> 1; 457 dma_wr = eni_in(MID_DMA_WR_RX); 458 dma_rd = eni_in(MID_DMA_RD_RX); 459 /* 460 * Can I move the dma_wr pointer by 2j+1 positions without overwriting 461 * data that hasn't been read (position of dma_rd) yet ? 462 */ 463 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 464 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 465 vcc->dev->number); 466 goto trouble; 467 } 468 for (i = 0; i < j; i++) { 469 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 470 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 471 dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 472 } 473 if (skb) { 474 ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 475 skb_queue_tail(&eni_dev->rx_queue,skb); 476 eni_vcc->last = skb; 477 rx_enqueued++; 478 } 479 eni_vcc->descr = here; 480 eni_out(dma_wr,MID_DMA_WR_RX); 481 return 0; 482 483 trouble: 484 if (paddr) 485 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, 486 DMA_FROM_DEVICE); 487 dma_map_error: 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 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 763 DMA_TO_DEVICE); 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 = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 1117 DMA_TO_DEVICE); 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_frag_page(&skb_shinfo(skb)->frags[i]) + 1138 skb_shinfo(skb)->frags[i].page_offset, 1139 skb_frag_size(&skb_shinfo(skb)->frags[i])); 1140 } 1141 if (skb->len & 3) { 1142 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma, 1143 4 - (skb->len & 3)); 1144 } 1145 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1146 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1147 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1148 MID_DMA_END | MID_DT_JK; 1149 j++; 1150 DPRINTK("DMA at end: %d\n",j); 1151 /* store frame */ 1152 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1153 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1154 (tx->resolution << MID_SEG_RATE_SHIFT) | 1155 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1156 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1157 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1158 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1159 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1160 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1161 DPRINTK("size: %d, len:%d\n",size,skb->len); 1162 if (aal5) 1163 writel(skb->len,tx->send+ 1164 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1165 j = j >> 1; 1166 for (i = 0; i < j; i++) { 1167 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1168 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1169 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1170 } 1171 ENI_PRV_POS(skb) = tx->tx_pos; 1172 ENI_PRV_SIZE(skb) = size; 1173 ENI_VCC(vcc)->txing += size; 1174 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1175 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1176 eni_out(dma_wr,MID_DMA_WR_TX); 1177 skb_queue_tail(&eni_dev->tx_queue,skb); 1178 queued++; 1179 return enq_ok; 1180 } 1181 1182 1183 static void poll_tx(struct atm_dev *dev) 1184 { 1185 struct eni_tx *tx; 1186 struct sk_buff *skb; 1187 enum enq_res res; 1188 int i; 1189 1190 DPRINTK(">poll_tx\n"); 1191 for (i = NR_CHAN-1; i >= 0; i--) { 1192 tx = &ENI_DEV(dev)->tx[i]; 1193 if (tx->send) 1194 while ((skb = skb_dequeue(&tx->backlog))) { 1195 res = do_tx(skb); 1196 if (res == enq_ok) continue; 1197 DPRINTK("re-queuing TX PDU\n"); 1198 skb_queue_head(&tx->backlog,skb); 1199 requeued++; 1200 if (res == enq_jam) return; 1201 break; 1202 } 1203 } 1204 } 1205 1206 1207 static void dequeue_tx(struct atm_dev *dev) 1208 { 1209 struct eni_dev *eni_dev; 1210 struct atm_vcc *vcc; 1211 struct sk_buff *skb; 1212 struct eni_tx *tx; 1213 1214 NULLCHECK(dev); 1215 eni_dev = ENI_DEV(dev); 1216 NULLCHECK(eni_dev); 1217 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1218 vcc = ATM_SKB(skb)->vcc; 1219 NULLCHECK(vcc); 1220 tx = ENI_VCC(vcc)->tx; 1221 NULLCHECK(ENI_VCC(vcc)->tx); 1222 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1223 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1224 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1225 eni_in(MID_TX_DESCRSTART(tx->index))) { 1226 skb_queue_head(&eni_dev->tx_queue,skb); 1227 break; 1228 } 1229 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1230 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 1231 DMA_TO_DEVICE); 1232 if (vcc->pop) vcc->pop(vcc,skb); 1233 else dev_kfree_skb_irq(skb); 1234 atomic_inc(&vcc->stats->tx); 1235 wake_up(&eni_dev->tx_wait); 1236 dma_complete++; 1237 } 1238 } 1239 1240 1241 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1242 { 1243 int i; 1244 1245 for (i = !ubr; i < NR_CHAN; i++) 1246 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1247 return NULL; 1248 } 1249 1250 1251 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1252 int *res,int unlimited) 1253 { 1254 static const int pre_div[] = { 4,16,128,2048 }; 1255 /* 2^(((x+2)^2-(x+2))/2+1) */ 1256 1257 if (unlimited) *pre = *res = 0; 1258 else { 1259 if (*pcr > 0) { 1260 int div; 1261 1262 for (*pre = 0; *pre < 3; (*pre)++) 1263 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1264 div = pre_div[*pre]**pcr; 1265 DPRINTK("min div %d\n",div); 1266 *res = TS_CLOCK/div-1; 1267 } 1268 else { 1269 int div; 1270 1271 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1272 for (*pre = 3; *pre >= 0; (*pre)--) 1273 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1274 if (*pre < 3) (*pre)++; /* else fail later */ 1275 div = pre_div[*pre]*-*pcr; 1276 DPRINTK("max div %d\n",div); 1277 *res = DIV_ROUND_UP(TS_CLOCK, div)-1; 1278 } 1279 if (*res < 0) *res = 0; 1280 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1281 } 1282 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1283 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1284 return 0; 1285 } 1286 1287 1288 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1289 int set_rsv,int set_shp) 1290 { 1291 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1292 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1293 struct eni_tx *tx; 1294 unsigned long size; 1295 void __iomem *mem; 1296 int rate,ubr,unlimited,new_tx; 1297 int pre,res,order; 1298 int error; 1299 1300 rate = atm_pcr_goal(txtp); 1301 ubr = txtp->traffic_class == ATM_UBR; 1302 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1303 rate >= ATM_OC3_PCR); 1304 if (!unlimited) { 1305 size = txtp->max_sdu*eni_dev->tx_mult/100; 1306 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1307 MID_MAX_BUF_SIZE) 1308 size = MID_MAX_BUF_SIZE; 1309 } 1310 else { 1311 if (eni_dev->ubr) { 1312 eni_vcc->tx = eni_dev->ubr; 1313 txtp->pcr = ATM_OC3_PCR; 1314 return 0; 1315 } 1316 size = UBR_BUFFER; 1317 } 1318 new_tx = !eni_vcc->tx; 1319 mem = NULL; /* for gcc */ 1320 if (!new_tx) tx = eni_vcc->tx; 1321 else { 1322 mem = eni_alloc_mem(eni_dev,&size); 1323 if (!mem) return -ENOBUFS; 1324 tx = alloc_tx(eni_dev,unlimited); 1325 if (!tx) { 1326 eni_free_mem(eni_dev,mem,size); 1327 return -EBUSY; 1328 } 1329 DPRINTK("got chan %d\n",tx->index); 1330 tx->reserved = tx->shaping = 0; 1331 tx->send = mem; 1332 tx->words = size >> 2; 1333 skb_queue_head_init(&tx->backlog); 1334 for (order = 0; size > (1 << (order+10)); order++); 1335 eni_out((order << MID_SIZE_SHIFT) | 1336 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1337 MID_TX_PLACE(tx->index)); 1338 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1339 MID_DESCR_START; 1340 } 1341 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1342 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1343 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1344 txtp->max_pcr < rate) error = -EINVAL; 1345 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1346 error = -EINVAL; 1347 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1348 error = -EINVAL; 1349 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1350 error = -EINVAL; 1351 if (error) { 1352 if (new_tx) { 1353 tx->send = NULL; 1354 eni_free_mem(eni_dev,mem,size); 1355 } 1356 return error; 1357 } 1358 txtp->pcr = rate; 1359 if (set_rsv && !ubr) { 1360 eni_dev->tx_bw += tx->reserved; 1361 tx->reserved = rate; 1362 eni_dev->tx_bw -= rate; 1363 } 1364 if (set_shp || (unlimited && new_tx)) { 1365 if (unlimited && new_tx) eni_dev->ubr = tx; 1366 tx->prescaler = pre; 1367 tx->resolution = res; 1368 tx->shaping = rate; 1369 } 1370 if (set_shp) eni_vcc->tx = tx; 1371 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1372 return 0; 1373 } 1374 1375 1376 static int open_tx_first(struct atm_vcc *vcc) 1377 { 1378 ENI_VCC(vcc)->tx = NULL; 1379 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1380 ENI_VCC(vcc)->txing = 0; 1381 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1382 } 1383 1384 1385 static int open_tx_second(struct atm_vcc *vcc) 1386 { 1387 return 0; /* nothing to do */ 1388 } 1389 1390 1391 static void close_tx(struct atm_vcc *vcc) 1392 { 1393 DECLARE_WAITQUEUE(wait,current); 1394 struct eni_dev *eni_dev; 1395 struct eni_vcc *eni_vcc; 1396 1397 eni_vcc = ENI_VCC(vcc); 1398 if (!eni_vcc->tx) return; 1399 eni_dev = ENI_DEV(vcc->dev); 1400 /* wait for TX queue to drain */ 1401 DPRINTK("eni_close: waiting for TX ...\n"); 1402 add_wait_queue(&eni_dev->tx_wait,&wait); 1403 set_current_state(TASK_UNINTERRUPTIBLE); 1404 for (;;) { 1405 int txing; 1406 1407 tasklet_disable(&eni_dev->task); 1408 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1409 tasklet_enable(&eni_dev->task); 1410 if (!txing) break; 1411 DPRINTK("%d TX left\n",eni_vcc->txing); 1412 schedule(); 1413 set_current_state(TASK_UNINTERRUPTIBLE); 1414 } 1415 set_current_state(TASK_RUNNING); 1416 remove_wait_queue(&eni_dev->tx_wait,&wait); 1417 if (eni_vcc->tx != eni_dev->ubr) { 1418 /* 1419 * Looping a few times in here is probably far cheaper than 1420 * keeping track of TX completions all the time, so let's poll 1421 * a bit ... 1422 */ 1423 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1424 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1425 schedule(); 1426 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1427 eni_vcc->tx->send = NULL; 1428 eni_dev->tx_bw += eni_vcc->tx->reserved; 1429 } 1430 eni_vcc->tx = NULL; 1431 } 1432 1433 1434 static int start_tx(struct atm_dev *dev) 1435 { 1436 struct eni_dev *eni_dev; 1437 int i; 1438 1439 eni_dev = ENI_DEV(dev); 1440 eni_dev->lost = 0; 1441 eni_dev->tx_bw = ATM_OC3_PCR; 1442 eni_dev->tx_mult = DEFAULT_TX_MULT; 1443 init_waitqueue_head(&eni_dev->tx_wait); 1444 eni_dev->ubr = NULL; 1445 skb_queue_head_init(&eni_dev->tx_queue); 1446 eni_out(0,MID_DMA_WR_TX); 1447 for (i = 0; i < NR_CHAN; i++) { 1448 eni_dev->tx[i].send = NULL; 1449 eni_dev->tx[i].index = i; 1450 } 1451 return 0; 1452 } 1453 1454 1455 /*--------------------------------- common ----------------------------------*/ 1456 1457 1458 #if 0 /* may become useful again when tuning things */ 1459 1460 static void foo(void) 1461 { 1462 printk(KERN_INFO 1463 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1464 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1465 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1466 rx_enqueued,rx_dequeued,putting,pushed); 1467 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1468 } 1469 1470 #endif 1471 1472 1473 static void bug_int(struct atm_dev *dev,unsigned long reason) 1474 { 1475 DPRINTK(">bug_int\n"); 1476 if (reason & MID_DMA_ERR_ACK) 1477 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1478 "error\n",dev->number); 1479 if (reason & MID_TX_IDENT_MISM) 1480 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1481 "mismatch\n",dev->number); 1482 if (reason & MID_TX_DMA_OVFL) 1483 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1484 "overflow\n",dev->number); 1485 EVENT("---dump ends here---\n",0,0); 1486 printk(KERN_NOTICE "---recent events---\n"); 1487 event_dump(); 1488 } 1489 1490 1491 static irqreturn_t eni_int(int irq,void *dev_id) 1492 { 1493 struct atm_dev *dev; 1494 struct eni_dev *eni_dev; 1495 u32 reason; 1496 1497 DPRINTK(">eni_int\n"); 1498 dev = dev_id; 1499 eni_dev = ENI_DEV(dev); 1500 reason = eni_in(MID_ISA); 1501 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1502 /* 1503 * Must handle these two right now, because reading ISA doesn't clear 1504 * them, so they re-occur and we never make it to the tasklet. Since 1505 * they're rare, we don't mind the occasional invocation of eni_tasklet 1506 * with eni_dev->events == 0. 1507 */ 1508 if (reason & MID_STAT_OVFL) { 1509 EVENT("stat overflow\n",0,0); 1510 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1511 } 1512 if (reason & MID_SUNI_INT) { 1513 EVENT("SUNI int\n",0,0); 1514 dev->phy->interrupt(dev); 1515 #if 0 1516 foo(); 1517 #endif 1518 } 1519 spin_lock(&eni_dev->lock); 1520 eni_dev->events |= reason; 1521 spin_unlock(&eni_dev->lock); 1522 tasklet_schedule(&eni_dev->task); 1523 return IRQ_HANDLED; 1524 } 1525 1526 1527 static void eni_tasklet(unsigned long data) 1528 { 1529 struct atm_dev *dev = (struct atm_dev *) data; 1530 struct eni_dev *eni_dev = ENI_DEV(dev); 1531 unsigned long flags; 1532 u32 events; 1533 1534 DPRINTK("eni_tasklet (dev %p)\n",dev); 1535 spin_lock_irqsave(&eni_dev->lock,flags); 1536 events = xchg(&eni_dev->events,0); 1537 spin_unlock_irqrestore(&eni_dev->lock,flags); 1538 if (events & MID_RX_DMA_COMPLETE) { 1539 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1540 dequeue_rx(dev); 1541 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1542 poll_rx(dev); 1543 EVENT("poll_rx done\n",0,0); 1544 /* poll_tx ? */ 1545 } 1546 if (events & MID_SERVICE) { 1547 EVENT("INT: service, starting get_service\n",0,0); 1548 get_service(dev); 1549 EVENT("get_service done, starting poll_rx\n",0,0); 1550 poll_rx(dev); 1551 EVENT("poll_rx done\n",0,0); 1552 } 1553 if (events & MID_TX_DMA_COMPLETE) { 1554 EVENT("INT: TX DMA COMPLETE\n",0,0); 1555 dequeue_tx(dev); 1556 } 1557 if (events & MID_TX_COMPLETE) { 1558 EVENT("INT: TX COMPLETE\n",0,0); 1559 tx_complete++; 1560 wake_up(&eni_dev->tx_wait); 1561 /* poll_rx ? */ 1562 } 1563 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1564 EVENT("bug interrupt\n",0,0); 1565 bug_int(dev,events); 1566 } 1567 poll_tx(dev); 1568 } 1569 1570 1571 /*--------------------------------- entries ---------------------------------*/ 1572 1573 1574 static char * const media_name[] = { 1575 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1576 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1577 "TAXI","09?", "10?", "11?", /* 8-11 */ 1578 "12?", "13?", "14?", "15?", /* 12-15 */ 1579 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1580 "UTP", "21?", "22?", "23?", /* 20-23 */ 1581 "24?", "25?", "26?", "27?", /* 24-27 */ 1582 "28?", "29?", "30?", "31?" /* 28-31 */ 1583 }; 1584 1585 1586 #define SET_SEPROM \ 1587 ({ if (!error && !pci_error) { \ 1588 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1589 udelay(10); /* 10 usecs */ \ 1590 } }) 1591 #define GET_SEPROM \ 1592 ({ if (!error && !pci_error) { \ 1593 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1594 udelay(10); /* 10 usecs */ \ 1595 } }) 1596 1597 1598 static int get_esi_asic(struct atm_dev *dev) 1599 { 1600 struct eni_dev *eni_dev; 1601 unsigned char tonga; 1602 int error,failed,pci_error; 1603 int address,i,j; 1604 1605 eni_dev = ENI_DEV(dev); 1606 error = pci_error = 0; 1607 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1608 SET_SEPROM; 1609 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1610 /* start operation */ 1611 tonga |= SEPROM_DATA; 1612 SET_SEPROM; 1613 tonga |= SEPROM_CLK; 1614 SET_SEPROM; 1615 tonga &= ~SEPROM_DATA; 1616 SET_SEPROM; 1617 tonga &= ~SEPROM_CLK; 1618 SET_SEPROM; 1619 /* send address */ 1620 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1621 for (j = 7; j >= 0; j--) { 1622 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1623 tonga & ~SEPROM_DATA; 1624 SET_SEPROM; 1625 tonga |= SEPROM_CLK; 1626 SET_SEPROM; 1627 tonga &= ~SEPROM_CLK; 1628 SET_SEPROM; 1629 } 1630 /* get ack */ 1631 tonga |= SEPROM_DATA; 1632 SET_SEPROM; 1633 tonga |= SEPROM_CLK; 1634 SET_SEPROM; 1635 GET_SEPROM; 1636 failed = tonga & SEPROM_DATA; 1637 tonga &= ~SEPROM_CLK; 1638 SET_SEPROM; 1639 tonga |= SEPROM_DATA; 1640 SET_SEPROM; 1641 if (failed) error = -EIO; 1642 else { 1643 dev->esi[i] = 0; 1644 for (j = 7; j >= 0; j--) { 1645 dev->esi[i] <<= 1; 1646 tonga |= SEPROM_DATA; 1647 SET_SEPROM; 1648 tonga |= SEPROM_CLK; 1649 SET_SEPROM; 1650 GET_SEPROM; 1651 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1652 tonga &= ~SEPROM_CLK; 1653 SET_SEPROM; 1654 tonga |= SEPROM_DATA; 1655 SET_SEPROM; 1656 } 1657 /* get ack */ 1658 tonga |= SEPROM_DATA; 1659 SET_SEPROM; 1660 tonga |= SEPROM_CLK; 1661 SET_SEPROM; 1662 GET_SEPROM; 1663 if (!(tonga & SEPROM_DATA)) error = -EIO; 1664 tonga &= ~SEPROM_CLK; 1665 SET_SEPROM; 1666 tonga |= SEPROM_DATA; 1667 SET_SEPROM; 1668 } 1669 /* stop operation */ 1670 tonga &= ~SEPROM_DATA; 1671 SET_SEPROM; 1672 tonga |= SEPROM_CLK; 1673 SET_SEPROM; 1674 tonga |= SEPROM_DATA; 1675 SET_SEPROM; 1676 } 1677 if (pci_error) { 1678 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1679 "(0x%02x)\n",dev->number,pci_error); 1680 error = -EIO; 1681 } 1682 return error; 1683 } 1684 1685 1686 #undef SET_SEPROM 1687 #undef GET_SEPROM 1688 1689 1690 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1691 { 1692 void __iomem *mac_base; 1693 int i; 1694 1695 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1696 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1697 return 0; 1698 } 1699 1700 1701 static int eni_do_init(struct atm_dev *dev) 1702 { 1703 struct midway_eprom __iomem *eprom; 1704 struct eni_dev *eni_dev; 1705 struct pci_dev *pci_dev; 1706 unsigned long real_base; 1707 void __iomem *base; 1708 int error,i,last; 1709 1710 DPRINTK(">eni_init\n"); 1711 dev->ci_range.vpi_bits = 0; 1712 dev->ci_range.vci_bits = NR_VCI_LD; 1713 dev->link_rate = ATM_OC3_PCR; 1714 eni_dev = ENI_DEV(dev); 1715 pci_dev = eni_dev->pci_dev; 1716 real_base = pci_resource_start(pci_dev, 0); 1717 eni_dev->irq = pci_dev->irq; 1718 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1719 PCI_COMMAND_MEMORY | 1720 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1721 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1722 "(0x%02x)\n",dev->number,error); 1723 return -EIO; 1724 } 1725 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1726 dev->number,pci_dev->revision,real_base,eni_dev->irq); 1727 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 1728 printk("\n"); 1729 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1730 "mapping\n",dev->number); 1731 return -ENOMEM; 1732 } 1733 eni_dev->ioaddr = base; 1734 eni_dev->base_diff = real_base - (unsigned long) base; 1735 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1736 if (!eni_dev->asic) { 1737 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1738 if (readl(&eprom->magic) != ENI155_MAGIC) { 1739 printk("\n"); 1740 printk(KERN_ERR DEV_LABEL 1741 "(itf %d): bad magic - expected 0x%x, got 0x%x\n", 1742 dev->number, ENI155_MAGIC, 1743 (unsigned)readl(&eprom->magic)); 1744 error = -EINVAL; 1745 goto unmap; 1746 } 1747 } 1748 eni_dev->phy = base+PHY_BASE; 1749 eni_dev->reg = base+REG_BASE; 1750 eni_dev->ram = base+RAM_BASE; 1751 last = MAP_MAX_SIZE-RAM_BASE; 1752 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1753 writel(0x55555555,eni_dev->ram+i); 1754 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1755 else { 1756 writel(0xAAAAAAAA,eni_dev->ram+i); 1757 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1758 else writel(i,eni_dev->ram+i); 1759 } 1760 } 1761 for (i = 0; i < last; i += RAM_INCREMENT) 1762 if (readl(eni_dev->ram+i) != i) break; 1763 eni_dev->mem = i; 1764 memset_io(eni_dev->ram,0,eni_dev->mem); 1765 /* TODO: should shrink allocation now */ 1766 printk("mem=%dkB (",eni_dev->mem >> 10); 1767 /* TODO: check for non-SUNI, check for TAXI ? */ 1768 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1769 printk(")\n"); 1770 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1771 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1772 error = -EINVAL; 1773 goto unmap; 1774 } 1775 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1776 if (error) 1777 goto unmap; 1778 for (i = 0; i < ESI_LEN; i++) 1779 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1780 printk(")\n"); 1781 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1782 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1783 media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]); 1784 1785 error = suni_init(dev); 1786 if (error) 1787 goto unmap; 1788 out: 1789 return error; 1790 unmap: 1791 iounmap(base); 1792 goto out; 1793 } 1794 1795 static void eni_do_release(struct atm_dev *dev) 1796 { 1797 struct eni_dev *ed = ENI_DEV(dev); 1798 1799 dev->phy->stop(dev); 1800 dev->phy = NULL; 1801 iounmap(ed->ioaddr); 1802 } 1803 1804 static int eni_start(struct atm_dev *dev) 1805 { 1806 struct eni_dev *eni_dev; 1807 1808 void __iomem *buf; 1809 unsigned long buffer_mem; 1810 int error; 1811 1812 DPRINTK(">eni_start\n"); 1813 eni_dev = ENI_DEV(dev); 1814 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { 1815 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1816 dev->number,eni_dev->irq); 1817 error = -EAGAIN; 1818 goto out; 1819 } 1820 pci_set_master(eni_dev->pci_dev); 1821 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1822 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1823 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1824 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1825 "master (0x%02x)\n",dev->number,error); 1826 goto free_irq; 1827 } 1828 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1829 END_SWAP_DMA))) { 1830 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1831 "(0x%02x)\n",dev->number,error); 1832 goto free_irq; 1833 } 1834 /* determine addresses of internal tables */ 1835 eni_dev->vci = eni_dev->ram; 1836 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1837 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1838 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1839 buf = eni_dev->service+NR_SERVICE*4; 1840 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1841 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1842 eni_dev->service,buf); 1843 spin_lock_init(&eni_dev->lock); 1844 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1845 eni_dev->events = 0; 1846 /* initialize memory management */ 1847 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1848 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1849 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1, 1850 sizeof(*eni_dev->free_list), 1851 GFP_KERNEL); 1852 if (!eni_dev->free_list) { 1853 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1854 dev->number); 1855 error = -ENOMEM; 1856 goto free_irq; 1857 } 1858 eni_dev->free_len = 0; 1859 eni_put_free(eni_dev,buf,buffer_mem); 1860 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1861 /* 1862 * byte_addr free (k) 1863 * 0x00000000 512 VCI table 1864 * 0x00004000 496 RX DMA 1865 * 0x00005000 492 TX DMA 1866 * 0x00006000 488 service list 1867 * 0x00007000 484 buffers 1868 * 0x00080000 0 end (512kB) 1869 */ 1870 eni_out(0xffffffff,MID_IE); 1871 error = start_tx(dev); 1872 if (error) goto free_list; 1873 error = start_rx(dev); 1874 if (error) goto free_list; 1875 error = dev->phy->start(dev); 1876 if (error) goto free_list; 1877 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1878 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1879 MID_MC_S); 1880 /* Tonga uses SBus INTReq1 */ 1881 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1882 return 0; 1883 1884 free_list: 1885 kfree(eni_dev->free_list); 1886 1887 free_irq: 1888 free_irq(eni_dev->irq, dev); 1889 1890 out: 1891 return error; 1892 } 1893 1894 1895 static void eni_close(struct atm_vcc *vcc) 1896 { 1897 DPRINTK(">eni_close\n"); 1898 if (!ENI_VCC(vcc)) return; 1899 clear_bit(ATM_VF_READY,&vcc->flags); 1900 close_rx(vcc); 1901 close_tx(vcc); 1902 DPRINTK("eni_close: done waiting\n"); 1903 /* deallocate memory */ 1904 kfree(ENI_VCC(vcc)); 1905 vcc->dev_data = NULL; 1906 clear_bit(ATM_VF_ADDR,&vcc->flags); 1907 /*foo();*/ 1908 } 1909 1910 1911 static int eni_open(struct atm_vcc *vcc) 1912 { 1913 struct eni_vcc *eni_vcc; 1914 int error; 1915 short vpi = vcc->vpi; 1916 int vci = vcc->vci; 1917 1918 DPRINTK(">eni_open\n"); 1919 EVENT("eni_open\n",0,0); 1920 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1921 vcc->dev_data = NULL; 1922 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1923 set_bit(ATM_VF_ADDR,&vcc->flags); 1924 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1925 return -EINVAL; 1926 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1927 vcc->vci); 1928 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1929 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1930 if (!eni_vcc) return -ENOMEM; 1931 vcc->dev_data = eni_vcc; 1932 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1933 if ((error = open_rx_first(vcc))) { 1934 eni_close(vcc); 1935 return error; 1936 } 1937 if ((error = open_tx_first(vcc))) { 1938 eni_close(vcc); 1939 return error; 1940 } 1941 } 1942 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1943 if ((error = open_rx_second(vcc))) { 1944 eni_close(vcc); 1945 return error; 1946 } 1947 if ((error = open_tx_second(vcc))) { 1948 eni_close(vcc); 1949 return error; 1950 } 1951 set_bit(ATM_VF_READY,&vcc->flags); 1952 /* should power down SUNI while !ref_count @@@ */ 1953 return 0; 1954 } 1955 1956 1957 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1958 { 1959 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1960 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1961 struct sk_buff *skb; 1962 int error,rate,rsv,shp; 1963 1964 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1965 if (tx == eni_dev->ubr) return -EBADFD; 1966 rate = atm_pcr_goal(&qos->txtp); 1967 if (rate < 0) rate = -rate; 1968 rsv = shp = 0; 1969 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1970 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1971 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1972 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1973 if (!rsv && !shp) return 0; 1974 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1975 if (error) return error; 1976 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1977 /* 1978 * Walk through the send buffer and patch the rate information in all 1979 * segmentation buffer descriptors of this VCC. 1980 */ 1981 tasklet_disable(&eni_dev->task); 1982 skb_queue_walk(&eni_dev->tx_queue, skb) { 1983 void __iomem *dsc; 1984 1985 if (ATM_SKB(skb)->vcc != vcc) continue; 1986 dsc = tx->send+ENI_PRV_POS(skb)*4; 1987 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1988 (tx->prescaler << MID_SEG_PR_SHIFT) | 1989 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1990 } 1991 tasklet_enable(&eni_dev->task); 1992 return 0; 1993 } 1994 1995 1996 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1997 { 1998 struct eni_dev *eni_dev = ENI_DEV(dev); 1999 2000 if (cmd == ENI_MEMDUMP) { 2001 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2002 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 2003 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 2004 dump(dev); 2005 return 0; 2006 } 2007 if (cmd == ENI_SETMULT) { 2008 struct eni_multipliers mult; 2009 2010 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2011 if (copy_from_user(&mult, arg, 2012 sizeof(struct eni_multipliers))) 2013 return -EFAULT; 2014 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2015 mult.tx > 65536 || mult.rx > 65536) 2016 return -EINVAL; 2017 if (mult.tx) eni_dev->tx_mult = mult.tx; 2018 if (mult.rx) eni_dev->rx_mult = mult.rx; 2019 return 0; 2020 } 2021 if (cmd == ATM_SETCIRANGE) { 2022 struct atm_cirange ci; 2023 2024 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2025 return -EFAULT; 2026 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2027 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2028 return 0; 2029 return -EINVAL; 2030 } 2031 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2032 return dev->phy->ioctl(dev,cmd,arg); 2033 } 2034 2035 2036 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2037 void __user *optval,int optlen) 2038 { 2039 return -EINVAL; 2040 } 2041 2042 2043 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2044 void __user *optval,unsigned int optlen) 2045 { 2046 return -EINVAL; 2047 } 2048 2049 2050 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2051 { 2052 enum enq_res res; 2053 2054 DPRINTK(">eni_send\n"); 2055 if (!ENI_VCC(vcc)->tx) { 2056 if (vcc->pop) vcc->pop(vcc,skb); 2057 else dev_kfree_skb(skb); 2058 return -EINVAL; 2059 } 2060 if (!skb) { 2061 printk(KERN_CRIT "!skb in eni_send ?\n"); 2062 if (vcc->pop) vcc->pop(vcc,skb); 2063 return -EINVAL; 2064 } 2065 if (vcc->qos.aal == ATM_AAL0) { 2066 if (skb->len != ATM_CELL_SIZE-1) { 2067 if (vcc->pop) vcc->pop(vcc,skb); 2068 else dev_kfree_skb(skb); 2069 return -EINVAL; 2070 } 2071 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2072 } 2073 submitted++; 2074 ATM_SKB(skb)->vcc = vcc; 2075 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2076 res = do_tx(skb); 2077 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2078 if (res == enq_ok) return 0; 2079 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2080 backlogged++; 2081 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2082 return 0; 2083 } 2084 2085 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2086 unsigned long addr) 2087 { 2088 writel(value,ENI_DEV(dev)->phy+addr*4); 2089 } 2090 2091 2092 2093 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2094 { 2095 return readl(ENI_DEV(dev)->phy+addr*4); 2096 } 2097 2098 2099 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2100 { 2101 struct sock *s; 2102 static const char *signal[] = { "LOST","unknown","okay" }; 2103 struct eni_dev *eni_dev = ENI_DEV(dev); 2104 struct atm_vcc *vcc; 2105 int left,i; 2106 2107 left = *pos; 2108 if (!left) 2109 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2110 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2111 eni_dev->mem >> 10,eni_dev->tx_bw); 2112 if (!--left) 2113 return sprintf(page,"%4sBursts: TX" 2114 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2115 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2116 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2117 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2118 " none" 2119 #endif 2120 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2121 " 16W" 2122 #endif 2123 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2124 " 8W" 2125 #endif 2126 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2127 " 4W" 2128 #endif 2129 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2130 " 2W" 2131 #endif 2132 ", RX" 2133 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2134 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2135 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2136 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2137 " none" 2138 #endif 2139 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2140 " 16W" 2141 #endif 2142 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2143 " 8W" 2144 #endif 2145 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2146 " 4W" 2147 #endif 2148 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2149 " 2W" 2150 #endif 2151 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2152 " (default)" 2153 #endif 2154 "\n",""); 2155 if (!--left) 2156 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2157 "",eni_dev->tx_mult,eni_dev->rx_mult); 2158 for (i = 0; i < NR_CHAN; i++) { 2159 struct eni_tx *tx = eni_dev->tx+i; 2160 2161 if (!tx->send) continue; 2162 if (!--left) { 2163 return sprintf(page, "tx[%d]: 0x%lx-0x%lx " 2164 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2165 (unsigned long) (tx->send - eni_dev->ram), 2166 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2167 tx->reserved,tx->shaping, 2168 tx == eni_dev->ubr ? " (UBR)" : ""); 2169 } 2170 if (--left) continue; 2171 return sprintf(page,"%10sbacklog %u packets\n","", 2172 skb_queue_len(&tx->backlog)); 2173 } 2174 read_lock(&vcc_sklist_lock); 2175 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2176 struct hlist_head *head = &vcc_hash[i]; 2177 2178 sk_for_each(s, head) { 2179 struct eni_vcc *eni_vcc; 2180 int length; 2181 2182 vcc = atm_sk(s); 2183 if (vcc->dev != dev) 2184 continue; 2185 eni_vcc = ENI_VCC(vcc); 2186 if (--left) continue; 2187 length = sprintf(page,"vcc %4d: ",vcc->vci); 2188 if (eni_vcc->rx) { 2189 length += sprintf(page+length, "0x%lx-0x%lx " 2190 "(%6ld bytes)", 2191 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2192 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2193 eni_vcc->words*4); 2194 if (eni_vcc->tx) length += sprintf(page+length,", "); 2195 } 2196 if (eni_vcc->tx) 2197 length += sprintf(page+length,"tx[%d], txing %d bytes", 2198 eni_vcc->tx->index,eni_vcc->txing); 2199 page[length] = '\n'; 2200 read_unlock(&vcc_sklist_lock); 2201 return length+1; 2202 } 2203 } 2204 read_unlock(&vcc_sklist_lock); 2205 for (i = 0; i < eni_dev->free_len; i++) { 2206 struct eni_free *fe = eni_dev->free_list+i; 2207 unsigned long offset; 2208 2209 if (--left) continue; 2210 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2211 return sprintf(page,"free %p-%p (%6d bytes)\n", 2212 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2213 1 << fe->order); 2214 } 2215 return 0; 2216 } 2217 2218 2219 static const struct atmdev_ops ops = { 2220 .open = eni_open, 2221 .close = eni_close, 2222 .ioctl = eni_ioctl, 2223 .getsockopt = eni_getsockopt, 2224 .setsockopt = eni_setsockopt, 2225 .send = eni_send, 2226 .phy_put = eni_phy_put, 2227 .phy_get = eni_phy_get, 2228 .change_qos = eni_change_qos, 2229 .proc_read = eni_proc_read 2230 }; 2231 2232 2233 static int eni_init_one(struct pci_dev *pci_dev, 2234 const struct pci_device_id *ent) 2235 { 2236 struct atm_dev *dev; 2237 struct eni_dev *eni_dev; 2238 struct eni_zero *zero; 2239 int rc; 2240 2241 rc = pci_enable_device(pci_dev); 2242 if (rc < 0) 2243 goto out; 2244 2245 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); 2246 if (rc < 0) 2247 goto out; 2248 2249 rc = -ENOMEM; 2250 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); 2251 if (!eni_dev) 2252 goto err_disable; 2253 2254 zero = &eni_dev->zero; 2255 zero->addr = dma_alloc_coherent(&pci_dev->dev, 2256 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL); 2257 if (!zero->addr) 2258 goto err_kfree; 2259 2260 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); 2261 if (!dev) 2262 goto err_free_consistent; 2263 2264 dev->dev_data = eni_dev; 2265 pci_set_drvdata(pci_dev, dev); 2266 eni_dev->pci_dev = pci_dev; 2267 eni_dev->asic = ent->driver_data; 2268 2269 rc = eni_do_init(dev); 2270 if (rc < 0) 2271 goto err_unregister; 2272 2273 rc = eni_start(dev); 2274 if (rc < 0) 2275 goto err_eni_release; 2276 2277 eni_dev->more = eni_boards; 2278 eni_boards = dev; 2279 out: 2280 return rc; 2281 2282 err_eni_release: 2283 eni_do_release(dev); 2284 err_unregister: 2285 atm_dev_deregister(dev); 2286 err_free_consistent: 2287 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2288 err_kfree: 2289 kfree(eni_dev); 2290 err_disable: 2291 pci_disable_device(pci_dev); 2292 goto out; 2293 } 2294 2295 2296 static const struct pci_device_id eni_pci_tbl[] = { 2297 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, 2298 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, 2299 { 0, } 2300 }; 2301 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2302 2303 2304 static void eni_remove_one(struct pci_dev *pdev) 2305 { 2306 struct atm_dev *dev = pci_get_drvdata(pdev); 2307 struct eni_dev *ed = ENI_DEV(dev); 2308 struct eni_zero *zero = &ed->zero; 2309 2310 eni_do_release(dev); 2311 atm_dev_deregister(dev); 2312 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2313 kfree(ed); 2314 pci_disable_device(pdev); 2315 } 2316 2317 2318 static struct pci_driver eni_driver = { 2319 .name = DEV_LABEL, 2320 .id_table = eni_pci_tbl, 2321 .probe = eni_init_one, 2322 .remove = eni_remove_one, 2323 }; 2324 2325 2326 static int __init eni_init(void) 2327 { 2328 struct sk_buff *skb; /* dummy for sizeof */ 2329 2330 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv)); 2331 return pci_register_driver(&eni_driver); 2332 } 2333 2334 2335 module_init(eni_init); 2336 /* @@@ since exit routine not defined, this module can not be unloaded */ 2337 2338 MODULE_LICENSE("GPL"); 2339