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 <asm/uaccess.h> 25 #include <asm/string.h> 26 #include <asm/byteorder.h> 27 28 #include "tonga.h" 29 #include "midway.h" 30 #include "suni.h" 31 #include "eni.h" 32 33 #if !defined(__i386__) && !defined(__x86_64__) 34 #ifndef ioremap_nocache 35 #define ioremap_nocache(X,Y) ioremap(X,Y) 36 #endif 37 #endif 38 39 /* 40 * TODO: 41 * 42 * Show stoppers 43 * none 44 * 45 * Minor 46 * - OAM support 47 * - fix bugs listed below 48 */ 49 50 /* 51 * KNOWN BUGS: 52 * 53 * - may run into JK-JK bug and deadlock 54 * - should allocate UBR channel first 55 * - buffer space allocation algorithm is stupid 56 * (RX: should be maxSDU+maxdelay*rate 57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 58 * - doesn't support OAM cells 59 * - eni_put_free may hang if not putting memory fragments that _complete_ 60 * 2^n block (never happens in real life, though) 61 */ 62 63 64 #if 0 65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 66 #else 67 #define DPRINTK(format,args...) 68 #endif 69 70 71 #ifndef CONFIG_ATM_ENI_TUNE_BURST 72 #define CONFIG_ATM_ENI_BURST_TX_8W 73 #define CONFIG_ATM_ENI_BURST_RX_4W 74 #endif 75 76 77 #ifndef CONFIG_ATM_ENI_DEBUG 78 79 80 #define NULLCHECK(x) 81 82 #define EVENT(s,a,b) 83 84 85 static void event_dump(void) 86 { 87 } 88 89 90 #else 91 92 93 /* 94 * NULL pointer checking 95 */ 96 97 #define NULLCHECK(x) \ 98 if ((unsigned long) (x) < 0x30) \ 99 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 100 101 /* 102 * Very extensive activity logging. Greatly improves bug detection speed but 103 * costs a few Mbps if enabled. 104 */ 105 106 #define EV 64 107 108 static const char *ev[EV]; 109 static unsigned long ev_a[EV],ev_b[EV]; 110 static int ec = 0; 111 112 113 static void EVENT(const char *s,unsigned long a,unsigned long b) 114 { 115 ev[ec] = s; 116 ev_a[ec] = a; 117 ev_b[ec] = b; 118 ec = (ec+1) % EV; 119 } 120 121 122 static void event_dump(void) 123 { 124 int n,i; 125 126 for (n = 0; n < EV; n++) { 127 i = (ec+n) % EV; 128 printk(KERN_NOTICE); 129 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 130 } 131 } 132 133 134 #endif /* CONFIG_ATM_ENI_DEBUG */ 135 136 137 /* 138 * NExx must not be equal at end 139 * EExx may be equal at end 140 * xxPJOK verify validity of pointer jumps 141 * xxPMOK operating on a circular buffer of "c" words 142 */ 143 144 #define NEPJOK(a0,a1,b) \ 145 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 146 #define EEPJOK(a0,a1,b) \ 147 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 148 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 149 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 150 151 152 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 153 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 154 putting = 0; 155 156 static struct atm_dev *eni_boards = NULL; 157 158 /* 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 DPRINTK("trying: %ld->%d\n",*size,order); 246 best_order = 65; /* we don't have more than 2^64 of anything ... */ 247 index = 0; /* silence GCC */ 248 for (i = 0; i < len; i++) 249 if (list[i].order == order) { 250 best_order = order; 251 index = i; 252 break; 253 } 254 else if (best_order > list[i].order && list[i].order > order) { 255 best_order = list[i].order; 256 index = i; 257 } 258 if (best_order == 65) return NULL; 259 start = list[index].start-eni_dev->base_diff; 260 list[index] = list[--len]; 261 eni_dev->free_len = len; 262 *size = 1 << order; 263 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 264 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 265 memset_io(start,0,*size); /* never leak data */ 266 /*dump_mem(eni_dev);*/ 267 return start; 268 } 269 270 271 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 272 unsigned long size) 273 { 274 struct eni_free *list; 275 int len,i,order; 276 277 start += eni_dev->base_diff; 278 list = eni_dev->free_list; 279 len = eni_dev->free_len; 280 for (order = -1; size; order++) size >>= 1; 281 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 282 for (i = 0; i < len; i++) 283 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 284 list[i].order == order) { 285 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 286 list[i].start,start,1 << order,list[i].order,order); 287 list[i] = list[--len]; 288 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 289 order++; 290 i = -1; 291 continue; 292 } 293 if (len >= eni_dev->free_list_size) { 294 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 295 order); 296 return; 297 } 298 list[len].start = start; 299 list[len].order = order; 300 eni_dev->free_len = len+1; 301 /*dump_mem(eni_dev);*/ 302 } 303 304 305 /*----------------------------------- RX ------------------------------------*/ 306 307 308 #define ENI_VCC_NOS ((struct atm_vcc *) 1) 309 310 311 static void rx_ident_err(struct atm_vcc *vcc) 312 { 313 struct atm_dev *dev; 314 struct eni_dev *eni_dev; 315 struct eni_vcc *eni_vcc; 316 317 dev = vcc->dev; 318 eni_dev = ENI_DEV(dev); 319 /* immediately halt adapter */ 320 eni_out(eni_in(MID_MC_S) & 321 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 322 /* dump useful information */ 323 eni_vcc = ENI_VCC(vcc); 324 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 325 "mismatch\n",dev->number); 326 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 327 eni_vcc->rxing,eni_vcc->words); 328 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 329 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 330 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 331 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 332 eni_vcc->servicing); 333 EVENT("---dump ends here---\n",0,0); 334 printk(KERN_NOTICE "---recent events---\n"); 335 event_dump(); 336 ENI_DEV(dev)->fast = NULL; /* really stop it */ 337 ENI_DEV(dev)->slow = NULL; 338 skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 339 } 340 341 342 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 343 unsigned long skip,unsigned long size,unsigned long eff) 344 { 345 struct eni_dev *eni_dev; 346 struct eni_vcc *eni_vcc; 347 u32 dma_rd,dma_wr; 348 u32 dma[RX_DMA_BUF*2]; 349 dma_addr_t paddr; 350 unsigned long here; 351 int i,j; 352 353 eni_dev = ENI_DEV(vcc->dev); 354 eni_vcc = ENI_VCC(vcc); 355 paddr = 0; /* GCC, shut up */ 356 if (skb) { 357 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 358 DMA_FROM_DEVICE); 359 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) 360 goto dma_map_error; 361 ENI_PRV_PADDR(skb) = paddr; 362 if (paddr & 3) 363 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 364 "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 365 vcc->vci,(unsigned long) paddr); 366 ENI_PRV_SIZE(skb) = size+skip; 367 /* PDU plus descriptor */ 368 ATM_SKB(skb)->vcc = vcc; 369 } 370 j = 0; 371 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 372 here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 373 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 374 << MID_DMA_VCI_SHIFT) | MID_DT_JK; 375 j++; 376 } 377 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 378 if (!eff) size += skip; 379 else { 380 unsigned long words; 381 382 if (!size) { 383 DPRINTK("strange things happen ...\n"); 384 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 385 size,eff); 386 } 387 words = eff; 388 if (paddr & 15) { 389 unsigned long init; 390 391 init = 4-((paddr & 15) >> 2); 392 if (init > words) init = words; 393 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 394 (vcc->vci << MID_DMA_VCI_SHIFT); 395 dma[j++] = paddr; 396 paddr += init << 2; 397 words -= init; 398 } 399 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 400 if (words & ~15) { 401 dma[j++] = MID_DT_16W | ((words >> 4) << 402 MID_DMA_COUNT_SHIFT) | (vcc->vci << 403 MID_DMA_VCI_SHIFT); 404 dma[j++] = paddr; 405 paddr += (words & ~15) << 2; 406 words &= 15; 407 } 408 #endif 409 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 410 if (words & ~7) { 411 dma[j++] = MID_DT_8W | ((words >> 3) << 412 MID_DMA_COUNT_SHIFT) | (vcc->vci << 413 MID_DMA_VCI_SHIFT); 414 dma[j++] = paddr; 415 paddr += (words & ~7) << 2; 416 words &= 7; 417 } 418 #endif 419 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 420 if (words & ~3) { 421 dma[j++] = MID_DT_4W | ((words >> 2) << 422 MID_DMA_COUNT_SHIFT) | (vcc->vci << 423 MID_DMA_VCI_SHIFT); 424 dma[j++] = paddr; 425 paddr += (words & ~3) << 2; 426 words &= 3; 427 } 428 #endif 429 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 430 if (words & ~1) { 431 dma[j++] = MID_DT_2W | ((words >> 1) << 432 MID_DMA_COUNT_SHIFT) | (vcc->vci << 433 MID_DMA_VCI_SHIFT); 434 dma[j++] = paddr; 435 paddr += (words & ~1) << 2; 436 words &= 1; 437 } 438 #endif 439 if (words) { 440 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 441 | (vcc->vci << MID_DMA_VCI_SHIFT); 442 dma[j++] = paddr; 443 } 444 } 445 if (size != eff) { 446 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 447 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 448 j++; 449 } 450 if (!j || j > 2*RX_DMA_BUF) { 451 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 452 goto trouble; 453 } 454 dma[j-2] |= MID_DMA_END; 455 j = j >> 1; 456 dma_wr = eni_in(MID_DMA_WR_RX); 457 dma_rd = eni_in(MID_DMA_RD_RX); 458 /* 459 * Can I move the dma_wr pointer by 2j+1 positions without overwriting 460 * data that hasn't been read (position of dma_rd) yet ? 461 */ 462 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 463 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 464 vcc->dev->number); 465 goto trouble; 466 } 467 for (i = 0; i < j; i++) { 468 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 469 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 470 dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 471 } 472 if (skb) { 473 ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 474 skb_queue_tail(&eni_dev->rx_queue,skb); 475 eni_vcc->last = skb; 476 rx_enqueued++; 477 } 478 eni_vcc->descr = here; 479 eni_out(dma_wr,MID_DMA_WR_RX); 480 return 0; 481 482 trouble: 483 if (paddr) 484 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, 485 DMA_FROM_DEVICE); 486 dma_map_error: 487 if (skb) dev_kfree_skb_irq(skb); 488 return -1; 489 } 490 491 492 static void discard(struct atm_vcc *vcc,unsigned long size) 493 { 494 struct eni_vcc *eni_vcc; 495 496 eni_vcc = ENI_VCC(vcc); 497 EVENT("discard (size=%ld)\n",size,0); 498 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); 499 /* could do a full fallback, but that might be more expensive */ 500 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; 501 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); 502 } 503 504 505 /* 506 * TODO: should check whether direct copies (without DMA setup, dequeuing on 507 * interrupt, etc.) aren't much faster for AAL0 508 */ 509 510 static int rx_aal0(struct atm_vcc *vcc) 511 { 512 struct eni_vcc *eni_vcc; 513 unsigned long descr; 514 unsigned long length; 515 struct sk_buff *skb; 516 517 DPRINTK(">rx_aal0\n"); 518 eni_vcc = ENI_VCC(vcc); 519 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 520 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 521 rx_ident_err(vcc); 522 return 1; 523 } 524 if (descr & MID_RED_T) { 525 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 526 vcc->dev->number); 527 length = 0; 528 atomic_inc(&vcc->stats->rx_err); 529 } 530 else { 531 length = ATM_CELL_SIZE-1; /* no HEC */ 532 } 533 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; 534 if (!skb) { 535 discard(vcc,length >> 2); 536 return 0; 537 } 538 skb_put(skb,length); 539 skb->tstamp = eni_vcc->timestamp; 540 DPRINTK("got len %ld\n",length); 541 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; 542 eni_vcc->rxing++; 543 return 0; 544 } 545 546 547 static int rx_aal5(struct atm_vcc *vcc) 548 { 549 struct eni_vcc *eni_vcc; 550 unsigned long descr; 551 unsigned long size,eff,length; 552 struct sk_buff *skb; 553 554 EVENT("rx_aal5\n",0,0); 555 DPRINTK(">rx_aal5\n"); 556 eni_vcc = ENI_VCC(vcc); 557 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 558 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 559 rx_ident_err(vcc); 560 return 1; 561 } 562 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { 563 if (descr & MID_RED_T) { 564 EVENT("empty cell (descr=0x%lx)\n",descr,0); 565 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 566 vcc->dev->number); 567 size = 0; 568 } 569 else { 570 static unsigned long silence = 0; 571 572 if (time_after(jiffies, silence) || silence == 0) { 573 printk(KERN_WARNING DEV_LABEL "(itf %d): " 574 "discarding PDU(s) with CRC error\n", 575 vcc->dev->number); 576 silence = (jiffies+2*HZ)|1; 577 } 578 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 579 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, 580 size); 581 } 582 eff = length = 0; 583 atomic_inc(&vcc->stats->rx_err); 584 } 585 else { 586 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 587 DPRINTK("size=%ld\n",size); 588 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & 589 (eni_vcc->words-1)))*4) & 0xffff; 590 /* -trailer(2)+header(1) */ 591 if (length && length <= (size << 2)-8 && length <= 592 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; 593 else { /* ^ trailer length (8) */ 594 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, 595 length); 596 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " 597 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", 598 vcc->dev->number,vcc->vci,length,size << 2,descr); 599 length = eff = 0; 600 atomic_inc(&vcc->stats->rx_err); 601 } 602 } 603 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; 604 if (!skb) { 605 discard(vcc,size); 606 return 0; 607 } 608 skb_put(skb,length); 609 DPRINTK("got len %ld\n",length); 610 if (do_rx_dma(vcc,skb,1,size,eff)) return 1; 611 eni_vcc->rxing++; 612 return 0; 613 } 614 615 616 static inline int rx_vcc(struct atm_vcc *vcc) 617 { 618 void __iomem *vci_dsc; 619 unsigned long tmp; 620 struct eni_vcc *eni_vcc; 621 622 eni_vcc = ENI_VCC(vcc); 623 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; 624 EVENT("rx_vcc(1)\n",0,0); 625 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> 626 MID_VCI_DESCR_SHIFT)) { 627 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", 628 eni_vcc->descr,tmp); 629 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 630 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 631 MID_VCI_DESCR_SHIFT)); 632 if (ENI_VCC(vcc)->rx(vcc)) return 1; 633 } 634 /* clear IN_SERVICE flag */ 635 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); 636 /* 637 * If new data has arrived between evaluating the while condition and 638 * clearing IN_SERVICE, we wouldn't be notified until additional data 639 * follows. So we have to loop again to be sure. 640 */ 641 EVENT("rx_vcc(3)\n",0,0); 642 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) 643 >> MID_VCI_DESCR_SHIFT)) { 644 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", 645 eni_vcc->descr,tmp); 646 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 647 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 648 MID_VCI_DESCR_SHIFT)); 649 if (ENI_VCC(vcc)->rx(vcc)) return 1; 650 } 651 return 0; 652 } 653 654 655 static void poll_rx(struct atm_dev *dev) 656 { 657 struct eni_dev *eni_dev; 658 struct atm_vcc *curr; 659 660 eni_dev = ENI_DEV(dev); 661 while ((curr = eni_dev->fast)) { 662 EVENT("poll_rx.fast\n",0,0); 663 if (rx_vcc(curr)) return; 664 eni_dev->fast = ENI_VCC(curr)->next; 665 ENI_VCC(curr)->next = ENI_VCC_NOS; 666 barrier(); 667 ENI_VCC(curr)->servicing--; 668 } 669 while ((curr = eni_dev->slow)) { 670 EVENT("poll_rx.slow\n",0,0); 671 if (rx_vcc(curr)) return; 672 eni_dev->slow = ENI_VCC(curr)->next; 673 ENI_VCC(curr)->next = ENI_VCC_NOS; 674 barrier(); 675 ENI_VCC(curr)->servicing--; 676 } 677 } 678 679 680 static void get_service(struct atm_dev *dev) 681 { 682 struct eni_dev *eni_dev; 683 struct atm_vcc *vcc; 684 unsigned long vci; 685 686 DPRINTK(">get_service\n"); 687 eni_dev = ENI_DEV(dev); 688 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { 689 vci = readl(eni_dev->service+eni_dev->serv_read*4); 690 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); 691 vcc = eni_dev->rx_map[vci & 1023]; 692 if (!vcc) { 693 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " 694 "found\n",dev->number,vci); 695 continue; /* nasty but we try to go on anyway */ 696 /* @@@ nope, doesn't work */ 697 } 698 EVENT("getting from service\n",0,0); 699 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { 700 EVENT("double service\n",0,0); 701 DPRINTK("Grr, servicing VCC %ld twice\n",vci); 702 continue; 703 } 704 ENI_VCC(vcc)->timestamp = ktime_get_real(); 705 ENI_VCC(vcc)->next = NULL; 706 if (vcc->qos.rxtp.traffic_class == ATM_CBR) { 707 if (eni_dev->fast) 708 ENI_VCC(eni_dev->last_fast)->next = vcc; 709 else eni_dev->fast = vcc; 710 eni_dev->last_fast = vcc; 711 } 712 else { 713 if (eni_dev->slow) 714 ENI_VCC(eni_dev->last_slow)->next = vcc; 715 else eni_dev->slow = vcc; 716 eni_dev->last_slow = vcc; 717 } 718 putting++; 719 ENI_VCC(vcc)->servicing++; 720 } 721 } 722 723 724 static void dequeue_rx(struct atm_dev *dev) 725 { 726 struct eni_dev *eni_dev; 727 struct eni_vcc *eni_vcc; 728 struct atm_vcc *vcc; 729 struct sk_buff *skb; 730 void __iomem *vci_dsc; 731 int first; 732 733 eni_dev = ENI_DEV(dev); 734 first = 1; 735 while (1) { 736 skb = skb_dequeue(&eni_dev->rx_queue); 737 if (!skb) { 738 if (first) { 739 DPRINTK(DEV_LABEL "(itf %d): RX but not " 740 "rxing\n",dev->number); 741 EVENT("nothing to dequeue\n",0,0); 742 } 743 break; 744 } 745 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), 746 ENI_PRV_POS(skb)); 747 rx_dequeued++; 748 vcc = ATM_SKB(skb)->vcc; 749 eni_vcc = ENI_VCC(vcc); 750 first = 0; 751 vci_dsc = eni_dev->vci+vcc->vci*16; 752 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), 753 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, 754 eni_vcc->words)) { 755 EVENT("requeuing\n",0,0); 756 skb_queue_head(&eni_dev->rx_queue,skb); 757 break; 758 } 759 eni_vcc->rxing--; 760 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); 761 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 762 DMA_TO_DEVICE); 763 if (!skb->len) dev_kfree_skb_irq(skb); 764 else { 765 EVENT("pushing (len=%ld)\n",skb->len,0); 766 if (vcc->qos.aal == ATM_AAL0) 767 *(unsigned long *) skb->data = 768 ntohl(*(unsigned long *) skb->data); 769 memset(skb->cb,0,sizeof(struct eni_skb_prv)); 770 vcc->push(vcc,skb); 771 pushed++; 772 } 773 atomic_inc(&vcc->stats->rx); 774 } 775 wake_up(&eni_dev->rx_wait); 776 } 777 778 779 static int open_rx_first(struct atm_vcc *vcc) 780 { 781 struct eni_dev *eni_dev; 782 struct eni_vcc *eni_vcc; 783 unsigned long size; 784 785 DPRINTK("open_rx_first\n"); 786 eni_dev = ENI_DEV(vcc->dev); 787 eni_vcc = ENI_VCC(vcc); 788 eni_vcc->rx = NULL; 789 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; 790 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; 791 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= 792 MID_MAX_BUF_SIZE) 793 size = MID_MAX_BUF_SIZE; 794 eni_vcc->recv = eni_alloc_mem(eni_dev,&size); 795 DPRINTK("rx at 0x%lx\n",eni_vcc->recv); 796 eni_vcc->words = size >> 2; 797 if (!eni_vcc->recv) return -ENOBUFS; 798 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; 799 eni_vcc->descr = 0; 800 eni_vcc->rx_pos = 0; 801 eni_vcc->rxing = 0; 802 eni_vcc->servicing = 0; 803 eni_vcc->next = ENI_VCC_NOS; 804 return 0; 805 } 806 807 808 static int open_rx_second(struct atm_vcc *vcc) 809 { 810 void __iomem *here; 811 struct eni_dev *eni_dev; 812 struct eni_vcc *eni_vcc; 813 unsigned long size; 814 int order; 815 816 DPRINTK("open_rx_second\n"); 817 eni_dev = ENI_DEV(vcc->dev); 818 eni_vcc = ENI_VCC(vcc); 819 if (!eni_vcc->rx) return 0; 820 /* set up VCI descriptor */ 821 here = eni_dev->vci+vcc->vci*16; 822 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); 823 size = eni_vcc->words >> 8; 824 for (order = -1; size; order++) size >>= 1; 825 writel(0,here+4); /* descr, read = 0 */ 826 writel(0,here+8); /* write, state, count = 0 */ 827 if (eni_dev->rx_map[vcc->vci]) 828 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " 829 "in use\n",vcc->dev->number,vcc->vci); 830 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ 831 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << 832 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | 833 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << 834 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); 835 return 0; 836 } 837 838 839 static void close_rx(struct atm_vcc *vcc) 840 { 841 DECLARE_WAITQUEUE(wait,current); 842 void __iomem *here; 843 struct eni_dev *eni_dev; 844 struct eni_vcc *eni_vcc; 845 846 eni_vcc = ENI_VCC(vcc); 847 if (!eni_vcc->rx) return; 848 eni_dev = ENI_DEV(vcc->dev); 849 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { 850 here = eni_dev->vci+vcc->vci*16; 851 /* block receiver */ 852 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << 853 MID_VCI_MODE_SHIFT),here); 854 /* wait for receiver to become idle */ 855 udelay(27); 856 /* discard pending cell */ 857 writel(readl(here) & ~MID_VCI_IN_SERVICE,here); 858 /* don't accept any new ones */ 859 eni_dev->rx_map[vcc->vci] = NULL; 860 /* wait for RX queue to drain */ 861 DPRINTK("eni_close: waiting for RX ...\n"); 862 EVENT("RX closing\n",0,0); 863 add_wait_queue(&eni_dev->rx_wait,&wait); 864 set_current_state(TASK_UNINTERRUPTIBLE); 865 barrier(); 866 for (;;) { 867 /* transition service->rx: rxing++, servicing-- */ 868 if (!eni_vcc->servicing) { 869 barrier(); 870 if (!eni_vcc->rxing) break; 871 } 872 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, 873 eni_vcc->servicing); 874 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, 875 eni_vcc->rxing); 876 schedule(); 877 set_current_state(TASK_UNINTERRUPTIBLE); 878 } 879 for (;;) { 880 int at_end; 881 u32 tmp; 882 883 tasklet_disable(&eni_dev->task); 884 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; 885 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; 886 tasklet_enable(&eni_dev->task); 887 if (at_end) break; 888 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", 889 eni_vcc->rx_pos,tmp); 890 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", 891 eni_vcc->rx_pos,tmp); 892 schedule(); 893 set_current_state(TASK_UNINTERRUPTIBLE); 894 } 895 set_current_state(TASK_RUNNING); 896 remove_wait_queue(&eni_dev->rx_wait,&wait); 897 } 898 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); 899 eni_vcc->rx = NULL; 900 } 901 902 903 static int start_rx(struct atm_dev *dev) 904 { 905 struct eni_dev *eni_dev; 906 907 eni_dev = ENI_DEV(dev); 908 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); 909 if (!eni_dev->rx_map) { 910 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 911 dev->number); 912 free_page((unsigned long) eni_dev->free_list); 913 return -ENOMEM; 914 } 915 eni_dev->rx_mult = DEFAULT_RX_MULT; 916 eni_dev->fast = eni_dev->last_fast = NULL; 917 eni_dev->slow = eni_dev->last_slow = NULL; 918 init_waitqueue_head(&eni_dev->rx_wait); 919 skb_queue_head_init(&eni_dev->rx_queue); 920 eni_dev->serv_read = eni_in(MID_SERV_WRITE); 921 eni_out(0,MID_DMA_WR_RX); 922 return 0; 923 } 924 925 926 /*----------------------------------- TX ------------------------------------*/ 927 928 929 enum enq_res { enq_ok,enq_next,enq_jam }; 930 931 932 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 933 u32 size) 934 { 935 u32 init,words; 936 937 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 938 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 939 #if 0 /* don't complain anymore */ 940 if (paddr & 3) 941 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 942 if (size & 3) 943 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 944 #endif 945 if (paddr & 3) { 946 init = 4-(paddr & 3); 947 if (init > size || size < 7) init = size; 948 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 949 (unsigned long) paddr,init,size); 950 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 951 (chan << MID_DMA_CHAN_SHIFT); 952 dma[(*j)++] = paddr; 953 paddr += init; 954 size -= init; 955 } 956 words = size >> 2; 957 size &= 3; 958 if (words && (paddr & 31)) { 959 init = 8-((paddr & 31) >> 2); 960 if (init > words) init = words; 961 DPRINTK("put_dma: %lx DMA: %d/%d words\n", 962 (unsigned long) paddr,init,words); 963 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 964 (chan << MID_DMA_CHAN_SHIFT); 965 dma[(*j)++] = paddr; 966 paddr += init << 2; 967 words -= init; 968 } 969 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 970 if (words & ~15) { 971 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 972 (unsigned long) paddr,words >> 4,words); 973 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 974 | (chan << MID_DMA_CHAN_SHIFT); 975 dma[(*j)++] = paddr; 976 paddr += (words & ~15) << 2; 977 words &= 15; 978 } 979 #endif 980 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 981 if (words & ~7) { 982 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 983 (unsigned long) paddr,words >> 3,words); 984 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 985 | (chan << MID_DMA_CHAN_SHIFT); 986 dma[(*j)++] = paddr; 987 paddr += (words & ~7) << 2; 988 words &= 7; 989 } 990 #endif 991 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 992 if (words & ~3) { 993 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 994 (unsigned long) paddr,words >> 2,words); 995 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 996 | (chan << MID_DMA_CHAN_SHIFT); 997 dma[(*j)++] = paddr; 998 paddr += (words & ~3) << 2; 999 words &= 3; 1000 } 1001 #endif 1002 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 1003 if (words & ~1) { 1004 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 1005 (unsigned long) paddr,words >> 1,words); 1006 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 1007 | (chan << MID_DMA_CHAN_SHIFT); 1008 dma[(*j)++] = paddr; 1009 paddr += (words & ~1) << 2; 1010 words &= 1; 1011 } 1012 #endif 1013 if (words) { 1014 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 1015 words); 1016 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 1017 (chan << MID_DMA_CHAN_SHIFT); 1018 dma[(*j)++] = paddr; 1019 paddr += words << 2; 1020 } 1021 if (size) { 1022 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 1023 size); 1024 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 1025 (chan << MID_DMA_CHAN_SHIFT); 1026 dma[(*j)++] = paddr; 1027 } 1028 } 1029 1030 1031 static enum enq_res do_tx(struct sk_buff *skb) 1032 { 1033 struct atm_vcc *vcc; 1034 struct eni_dev *eni_dev; 1035 struct eni_vcc *eni_vcc; 1036 struct eni_tx *tx; 1037 dma_addr_t paddr; 1038 u32 dma_rd,dma_wr; 1039 u32 size; /* in words */ 1040 int aal5,dma_size,i,j; 1041 1042 DPRINTK(">do_tx\n"); 1043 NULLCHECK(skb); 1044 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1045 vcc = ATM_SKB(skb)->vcc; 1046 NULLCHECK(vcc); 1047 eni_dev = ENI_DEV(vcc->dev); 1048 NULLCHECK(eni_dev); 1049 eni_vcc = ENI_VCC(vcc); 1050 tx = eni_vcc->tx; 1051 NULLCHECK(tx); 1052 #if 0 /* Enable this for testing with the "align" program */ 1053 { 1054 unsigned int hack = *((char *) skb->data)-'0'; 1055 1056 if (hack < 8) { 1057 skb->data += hack; 1058 skb->len -= hack; 1059 } 1060 } 1061 #endif 1062 #if 0 /* should work now */ 1063 if ((unsigned long) skb->data & 3) 1064 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1065 "TX data\n",vcc->dev->number,vcc->vci); 1066 #endif 1067 /* 1068 * Potential future IP speedup: make hard_header big enough to put 1069 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1070 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1071 */ 1072 1073 aal5 = vcc->qos.aal == ATM_AAL5; 1074 /* check space in buffer */ 1075 if (!aal5) 1076 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1077 /* cell without HEC plus segmentation header (includes 1078 four-byte cell header) */ 1079 else { 1080 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1081 /* add AAL5 trailer */ 1082 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1083 /* add segmentation header */ 1084 } 1085 /* 1086 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1087 * to the read pointer ? TX_GAP means to leave some space for what 1088 * the manual calls "too close". 1089 */ 1090 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1091 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1092 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1093 vcc->dev->number,size); 1094 return enq_next; 1095 } 1096 /* check DMA */ 1097 dma_wr = eni_in(MID_DMA_WR_TX); 1098 dma_rd = eni_in(MID_DMA_RD_TX); 1099 dma_size = 3; /* JK for descriptor and final fill, plus final size 1100 mis-alignment fix */ 1101 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1102 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1103 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1104 if (dma_size > TX_DMA_BUF) { 1105 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1106 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1107 } 1108 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1109 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1110 dma_size) { 1111 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1112 vcc->dev->number); 1113 return enq_jam; 1114 } 1115 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 1116 DMA_TO_DEVICE); 1117 ENI_PRV_PADDR(skb) = paddr; 1118 /* prepare DMA queue entries */ 1119 j = 0; 1120 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1121 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1122 MID_DT_JK; 1123 j++; 1124 if (!skb_shinfo(skb)->nr_frags) 1125 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1126 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1127 else { 1128 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1129 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1130 if (i == -1) 1131 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1132 skb->data, 1133 skb_headlen(skb)); 1134 else 1135 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1136 skb_frag_page(&skb_shinfo(skb)->frags[i]) + 1137 skb_shinfo(skb)->frags[i].page_offset, 1138 skb_frag_size(&skb_shinfo(skb)->frags[i])); 1139 } 1140 if (skb->len & 3) { 1141 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma, 1142 4 - (skb->len & 3)); 1143 } 1144 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1145 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1146 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1147 MID_DMA_END | MID_DT_JK; 1148 j++; 1149 DPRINTK("DMA at end: %d\n",j); 1150 /* store frame */ 1151 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1152 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1153 (tx->resolution << MID_SEG_RATE_SHIFT) | 1154 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1155 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1156 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1157 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1158 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1159 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1160 DPRINTK("size: %d, len:%d\n",size,skb->len); 1161 if (aal5) 1162 writel(skb->len,tx->send+ 1163 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1164 j = j >> 1; 1165 for (i = 0; i < j; i++) { 1166 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1167 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1168 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1169 } 1170 ENI_PRV_POS(skb) = tx->tx_pos; 1171 ENI_PRV_SIZE(skb) = size; 1172 ENI_VCC(vcc)->txing += size; 1173 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1174 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1175 eni_out(dma_wr,MID_DMA_WR_TX); 1176 skb_queue_tail(&eni_dev->tx_queue,skb); 1177 queued++; 1178 return enq_ok; 1179 } 1180 1181 1182 static void poll_tx(struct atm_dev *dev) 1183 { 1184 struct eni_tx *tx; 1185 struct sk_buff *skb; 1186 enum enq_res res; 1187 int i; 1188 1189 DPRINTK(">poll_tx\n"); 1190 for (i = NR_CHAN-1; i >= 0; i--) { 1191 tx = &ENI_DEV(dev)->tx[i]; 1192 if (tx->send) 1193 while ((skb = skb_dequeue(&tx->backlog))) { 1194 res = do_tx(skb); 1195 if (res == enq_ok) continue; 1196 DPRINTK("re-queuing TX PDU\n"); 1197 skb_queue_head(&tx->backlog,skb); 1198 requeued++; 1199 if (res == enq_jam) return; 1200 break; 1201 } 1202 } 1203 } 1204 1205 1206 static void dequeue_tx(struct atm_dev *dev) 1207 { 1208 struct eni_dev *eni_dev; 1209 struct atm_vcc *vcc; 1210 struct sk_buff *skb; 1211 struct eni_tx *tx; 1212 1213 NULLCHECK(dev); 1214 eni_dev = ENI_DEV(dev); 1215 NULLCHECK(eni_dev); 1216 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1217 vcc = ATM_SKB(skb)->vcc; 1218 NULLCHECK(vcc); 1219 tx = ENI_VCC(vcc)->tx; 1220 NULLCHECK(ENI_VCC(vcc)->tx); 1221 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1222 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1223 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1224 eni_in(MID_TX_DESCRSTART(tx->index))) { 1225 skb_queue_head(&eni_dev->tx_queue,skb); 1226 break; 1227 } 1228 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1229 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 1230 DMA_TO_DEVICE); 1231 if (vcc->pop) vcc->pop(vcc,skb); 1232 else dev_kfree_skb_irq(skb); 1233 atomic_inc(&vcc->stats->tx); 1234 wake_up(&eni_dev->tx_wait); 1235 dma_complete++; 1236 } 1237 } 1238 1239 1240 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1241 { 1242 int i; 1243 1244 for (i = !ubr; i < NR_CHAN; i++) 1245 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1246 return NULL; 1247 } 1248 1249 1250 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1251 int *res,int unlimited) 1252 { 1253 static const int pre_div[] = { 4,16,128,2048 }; 1254 /* 2^(((x+2)^2-(x+2))/2+1) */ 1255 1256 if (unlimited) *pre = *res = 0; 1257 else { 1258 if (*pcr > 0) { 1259 int div; 1260 1261 for (*pre = 0; *pre < 3; (*pre)++) 1262 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1263 div = pre_div[*pre]**pcr; 1264 DPRINTK("min div %d\n",div); 1265 *res = TS_CLOCK/div-1; 1266 } 1267 else { 1268 int div; 1269 1270 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1271 for (*pre = 3; *pre >= 0; (*pre)--) 1272 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1273 if (*pre < 3) (*pre)++; /* else fail later */ 1274 div = pre_div[*pre]*-*pcr; 1275 DPRINTK("max div %d\n",div); 1276 *res = DIV_ROUND_UP(TS_CLOCK, div)-1; 1277 } 1278 if (*res < 0) *res = 0; 1279 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1280 } 1281 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1282 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1283 return 0; 1284 } 1285 1286 1287 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1288 int set_rsv,int set_shp) 1289 { 1290 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1291 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1292 struct eni_tx *tx; 1293 unsigned long size; 1294 void __iomem *mem; 1295 int rate,ubr,unlimited,new_tx; 1296 int pre,res,order; 1297 int error; 1298 1299 rate = atm_pcr_goal(txtp); 1300 ubr = txtp->traffic_class == ATM_UBR; 1301 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1302 rate >= ATM_OC3_PCR); 1303 if (!unlimited) { 1304 size = txtp->max_sdu*eni_dev->tx_mult/100; 1305 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1306 MID_MAX_BUF_SIZE) 1307 size = MID_MAX_BUF_SIZE; 1308 } 1309 else { 1310 if (eni_dev->ubr) { 1311 eni_vcc->tx = eni_dev->ubr; 1312 txtp->pcr = ATM_OC3_PCR; 1313 return 0; 1314 } 1315 size = UBR_BUFFER; 1316 } 1317 new_tx = !eni_vcc->tx; 1318 mem = NULL; /* for gcc */ 1319 if (!new_tx) tx = eni_vcc->tx; 1320 else { 1321 mem = eni_alloc_mem(eni_dev,&size); 1322 if (!mem) return -ENOBUFS; 1323 tx = alloc_tx(eni_dev,unlimited); 1324 if (!tx) { 1325 eni_free_mem(eni_dev,mem,size); 1326 return -EBUSY; 1327 } 1328 DPRINTK("got chan %d\n",tx->index); 1329 tx->reserved = tx->shaping = 0; 1330 tx->send = mem; 1331 tx->words = size >> 2; 1332 skb_queue_head_init(&tx->backlog); 1333 for (order = 0; size > (1 << (order+10)); order++); 1334 eni_out((order << MID_SIZE_SHIFT) | 1335 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1336 MID_TX_PLACE(tx->index)); 1337 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1338 MID_DESCR_START; 1339 } 1340 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1341 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1342 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1343 txtp->max_pcr < rate) error = -EINVAL; 1344 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1345 error = -EINVAL; 1346 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1347 error = -EINVAL; 1348 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1349 error = -EINVAL; 1350 if (error) { 1351 if (new_tx) { 1352 tx->send = NULL; 1353 eni_free_mem(eni_dev,mem,size); 1354 } 1355 return error; 1356 } 1357 txtp->pcr = rate; 1358 if (set_rsv && !ubr) { 1359 eni_dev->tx_bw += tx->reserved; 1360 tx->reserved = rate; 1361 eni_dev->tx_bw -= rate; 1362 } 1363 if (set_shp || (unlimited && new_tx)) { 1364 if (unlimited && new_tx) eni_dev->ubr = tx; 1365 tx->prescaler = pre; 1366 tx->resolution = res; 1367 tx->shaping = rate; 1368 } 1369 if (set_shp) eni_vcc->tx = tx; 1370 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1371 return 0; 1372 } 1373 1374 1375 static int open_tx_first(struct atm_vcc *vcc) 1376 { 1377 ENI_VCC(vcc)->tx = NULL; 1378 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1379 ENI_VCC(vcc)->txing = 0; 1380 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1381 } 1382 1383 1384 static int open_tx_second(struct atm_vcc *vcc) 1385 { 1386 return 0; /* nothing to do */ 1387 } 1388 1389 1390 static void close_tx(struct atm_vcc *vcc) 1391 { 1392 DECLARE_WAITQUEUE(wait,current); 1393 struct eni_dev *eni_dev; 1394 struct eni_vcc *eni_vcc; 1395 1396 eni_vcc = ENI_VCC(vcc); 1397 if (!eni_vcc->tx) return; 1398 eni_dev = ENI_DEV(vcc->dev); 1399 /* wait for TX queue to drain */ 1400 DPRINTK("eni_close: waiting for TX ...\n"); 1401 add_wait_queue(&eni_dev->tx_wait,&wait); 1402 set_current_state(TASK_UNINTERRUPTIBLE); 1403 for (;;) { 1404 int txing; 1405 1406 tasklet_disable(&eni_dev->task); 1407 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1408 tasklet_enable(&eni_dev->task); 1409 if (!txing) break; 1410 DPRINTK("%d TX left\n",eni_vcc->txing); 1411 schedule(); 1412 set_current_state(TASK_UNINTERRUPTIBLE); 1413 } 1414 set_current_state(TASK_RUNNING); 1415 remove_wait_queue(&eni_dev->tx_wait,&wait); 1416 if (eni_vcc->tx != eni_dev->ubr) { 1417 /* 1418 * Looping a few times in here is probably far cheaper than 1419 * keeping track of TX completions all the time, so let's poll 1420 * a bit ... 1421 */ 1422 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1423 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1424 schedule(); 1425 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1426 eni_vcc->tx->send = NULL; 1427 eni_dev->tx_bw += eni_vcc->tx->reserved; 1428 } 1429 eni_vcc->tx = NULL; 1430 } 1431 1432 1433 static int start_tx(struct atm_dev *dev) 1434 { 1435 struct eni_dev *eni_dev; 1436 int i; 1437 1438 eni_dev = ENI_DEV(dev); 1439 eni_dev->lost = 0; 1440 eni_dev->tx_bw = ATM_OC3_PCR; 1441 eni_dev->tx_mult = DEFAULT_TX_MULT; 1442 init_waitqueue_head(&eni_dev->tx_wait); 1443 eni_dev->ubr = NULL; 1444 skb_queue_head_init(&eni_dev->tx_queue); 1445 eni_out(0,MID_DMA_WR_TX); 1446 for (i = 0; i < NR_CHAN; i++) { 1447 eni_dev->tx[i].send = NULL; 1448 eni_dev->tx[i].index = i; 1449 } 1450 return 0; 1451 } 1452 1453 1454 /*--------------------------------- common ----------------------------------*/ 1455 1456 1457 #if 0 /* may become useful again when tuning things */ 1458 1459 static void foo(void) 1460 { 1461 printk(KERN_INFO 1462 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1463 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1464 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1465 rx_enqueued,rx_dequeued,putting,pushed); 1466 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1467 } 1468 1469 #endif 1470 1471 1472 static void bug_int(struct atm_dev *dev,unsigned long reason) 1473 { 1474 DPRINTK(">bug_int\n"); 1475 if (reason & MID_DMA_ERR_ACK) 1476 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1477 "error\n",dev->number); 1478 if (reason & MID_TX_IDENT_MISM) 1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1480 "mismatch\n",dev->number); 1481 if (reason & MID_TX_DMA_OVFL) 1482 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1483 "overflow\n",dev->number); 1484 EVENT("---dump ends here---\n",0,0); 1485 printk(KERN_NOTICE "---recent events---\n"); 1486 event_dump(); 1487 } 1488 1489 1490 static irqreturn_t eni_int(int irq,void *dev_id) 1491 { 1492 struct atm_dev *dev; 1493 struct eni_dev *eni_dev; 1494 u32 reason; 1495 1496 DPRINTK(">eni_int\n"); 1497 dev = dev_id; 1498 eni_dev = ENI_DEV(dev); 1499 reason = eni_in(MID_ISA); 1500 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1501 /* 1502 * Must handle these two right now, because reading ISA doesn't clear 1503 * them, so they re-occur and we never make it to the tasklet. Since 1504 * they're rare, we don't mind the occasional invocation of eni_tasklet 1505 * with eni_dev->events == 0. 1506 */ 1507 if (reason & MID_STAT_OVFL) { 1508 EVENT("stat overflow\n",0,0); 1509 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1510 } 1511 if (reason & MID_SUNI_INT) { 1512 EVENT("SUNI int\n",0,0); 1513 dev->phy->interrupt(dev); 1514 #if 0 1515 foo(); 1516 #endif 1517 } 1518 spin_lock(&eni_dev->lock); 1519 eni_dev->events |= reason; 1520 spin_unlock(&eni_dev->lock); 1521 tasklet_schedule(&eni_dev->task); 1522 return IRQ_HANDLED; 1523 } 1524 1525 1526 static void eni_tasklet(unsigned long data) 1527 { 1528 struct atm_dev *dev = (struct atm_dev *) data; 1529 struct eni_dev *eni_dev = ENI_DEV(dev); 1530 unsigned long flags; 1531 u32 events; 1532 1533 DPRINTK("eni_tasklet (dev %p)\n",dev); 1534 spin_lock_irqsave(&eni_dev->lock,flags); 1535 events = xchg(&eni_dev->events,0); 1536 spin_unlock_irqrestore(&eni_dev->lock,flags); 1537 if (events & MID_RX_DMA_COMPLETE) { 1538 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1539 dequeue_rx(dev); 1540 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1541 poll_rx(dev); 1542 EVENT("poll_rx done\n",0,0); 1543 /* poll_tx ? */ 1544 } 1545 if (events & MID_SERVICE) { 1546 EVENT("INT: service, starting get_service\n",0,0); 1547 get_service(dev); 1548 EVENT("get_service done, starting poll_rx\n",0,0); 1549 poll_rx(dev); 1550 EVENT("poll_rx done\n",0,0); 1551 } 1552 if (events & MID_TX_DMA_COMPLETE) { 1553 EVENT("INT: TX DMA COMPLETE\n",0,0); 1554 dequeue_tx(dev); 1555 } 1556 if (events & MID_TX_COMPLETE) { 1557 EVENT("INT: TX COMPLETE\n",0,0); 1558 tx_complete++; 1559 wake_up(&eni_dev->tx_wait); 1560 /* poll_rx ? */ 1561 } 1562 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1563 EVENT("bug interrupt\n",0,0); 1564 bug_int(dev,events); 1565 } 1566 poll_tx(dev); 1567 } 1568 1569 1570 /*--------------------------------- entries ---------------------------------*/ 1571 1572 1573 static char * const media_name[] = { 1574 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1575 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1576 "TAXI","09?", "10?", "11?", /* 8-11 */ 1577 "12?", "13?", "14?", "15?", /* 12-15 */ 1578 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1579 "UTP", "21?", "22?", "23?", /* 20-23 */ 1580 "24?", "25?", "26?", "27?", /* 24-27 */ 1581 "28?", "29?", "30?", "31?" /* 28-31 */ 1582 }; 1583 1584 1585 #define SET_SEPROM \ 1586 ({ if (!error && !pci_error) { \ 1587 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1588 udelay(10); /* 10 usecs */ \ 1589 } }) 1590 #define GET_SEPROM \ 1591 ({ if (!error && !pci_error) { \ 1592 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1593 udelay(10); /* 10 usecs */ \ 1594 } }) 1595 1596 1597 static int get_esi_asic(struct atm_dev *dev) 1598 { 1599 struct eni_dev *eni_dev; 1600 unsigned char tonga; 1601 int error,failed,pci_error; 1602 int address,i,j; 1603 1604 eni_dev = ENI_DEV(dev); 1605 error = pci_error = 0; 1606 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1607 SET_SEPROM; 1608 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1609 /* start operation */ 1610 tonga |= SEPROM_DATA; 1611 SET_SEPROM; 1612 tonga |= SEPROM_CLK; 1613 SET_SEPROM; 1614 tonga &= ~SEPROM_DATA; 1615 SET_SEPROM; 1616 tonga &= ~SEPROM_CLK; 1617 SET_SEPROM; 1618 /* send address */ 1619 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1620 for (j = 7; j >= 0; j--) { 1621 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1622 tonga & ~SEPROM_DATA; 1623 SET_SEPROM; 1624 tonga |= SEPROM_CLK; 1625 SET_SEPROM; 1626 tonga &= ~SEPROM_CLK; 1627 SET_SEPROM; 1628 } 1629 /* get ack */ 1630 tonga |= SEPROM_DATA; 1631 SET_SEPROM; 1632 tonga |= SEPROM_CLK; 1633 SET_SEPROM; 1634 GET_SEPROM; 1635 failed = tonga & SEPROM_DATA; 1636 tonga &= ~SEPROM_CLK; 1637 SET_SEPROM; 1638 tonga |= SEPROM_DATA; 1639 SET_SEPROM; 1640 if (failed) error = -EIO; 1641 else { 1642 dev->esi[i] = 0; 1643 for (j = 7; j >= 0; j--) { 1644 dev->esi[i] <<= 1; 1645 tonga |= SEPROM_DATA; 1646 SET_SEPROM; 1647 tonga |= SEPROM_CLK; 1648 SET_SEPROM; 1649 GET_SEPROM; 1650 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1651 tonga &= ~SEPROM_CLK; 1652 SET_SEPROM; 1653 tonga |= SEPROM_DATA; 1654 SET_SEPROM; 1655 } 1656 /* get ack */ 1657 tonga |= SEPROM_DATA; 1658 SET_SEPROM; 1659 tonga |= SEPROM_CLK; 1660 SET_SEPROM; 1661 GET_SEPROM; 1662 if (!(tonga & SEPROM_DATA)) error = -EIO; 1663 tonga &= ~SEPROM_CLK; 1664 SET_SEPROM; 1665 tonga |= SEPROM_DATA; 1666 SET_SEPROM; 1667 } 1668 /* stop operation */ 1669 tonga &= ~SEPROM_DATA; 1670 SET_SEPROM; 1671 tonga |= SEPROM_CLK; 1672 SET_SEPROM; 1673 tonga |= SEPROM_DATA; 1674 SET_SEPROM; 1675 } 1676 if (pci_error) { 1677 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1678 "(0x%02x)\n",dev->number,pci_error); 1679 error = -EIO; 1680 } 1681 return error; 1682 } 1683 1684 1685 #undef SET_SEPROM 1686 #undef GET_SEPROM 1687 1688 1689 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1690 { 1691 void __iomem *mac_base; 1692 int i; 1693 1694 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1695 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1696 return 0; 1697 } 1698 1699 1700 static int eni_do_init(struct atm_dev *dev) 1701 { 1702 struct midway_eprom __iomem *eprom; 1703 struct eni_dev *eni_dev; 1704 struct pci_dev *pci_dev; 1705 unsigned long real_base; 1706 void __iomem *base; 1707 int error,i,last; 1708 1709 DPRINTK(">eni_init\n"); 1710 dev->ci_range.vpi_bits = 0; 1711 dev->ci_range.vci_bits = NR_VCI_LD; 1712 dev->link_rate = ATM_OC3_PCR; 1713 eni_dev = ENI_DEV(dev); 1714 pci_dev = eni_dev->pci_dev; 1715 real_base = pci_resource_start(pci_dev, 0); 1716 eni_dev->irq = pci_dev->irq; 1717 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1718 PCI_COMMAND_MEMORY | 1719 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1720 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1721 "(0x%02x)\n",dev->number,error); 1722 return -EIO; 1723 } 1724 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1725 dev->number,pci_dev->revision,real_base,eni_dev->irq); 1726 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 1727 printk("\n"); 1728 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1729 "mapping\n",dev->number); 1730 return error; 1731 } 1732 eni_dev->ioaddr = base; 1733 eni_dev->base_diff = real_base - (unsigned long) base; 1734 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1735 if (!eni_dev->asic) { 1736 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1737 if (readl(&eprom->magic) != ENI155_MAGIC) { 1738 printk("\n"); 1739 printk(KERN_ERR DEV_LABEL 1740 "(itf %d): bad magic - expected 0x%x, got 0x%x\n", 1741 dev->number, ENI155_MAGIC, 1742 (unsigned)readl(&eprom->magic)); 1743 error = -EINVAL; 1744 goto unmap; 1745 } 1746 } 1747 eni_dev->phy = base+PHY_BASE; 1748 eni_dev->reg = base+REG_BASE; 1749 eni_dev->ram = base+RAM_BASE; 1750 last = MAP_MAX_SIZE-RAM_BASE; 1751 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1752 writel(0x55555555,eni_dev->ram+i); 1753 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1754 else { 1755 writel(0xAAAAAAAA,eni_dev->ram+i); 1756 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1757 else writel(i,eni_dev->ram+i); 1758 } 1759 } 1760 for (i = 0; i < last; i += RAM_INCREMENT) 1761 if (readl(eni_dev->ram+i) != i) break; 1762 eni_dev->mem = i; 1763 memset_io(eni_dev->ram,0,eni_dev->mem); 1764 /* TODO: should shrink allocation now */ 1765 printk("mem=%dkB (",eni_dev->mem >> 10); 1766 /* TODO: check for non-SUNI, check for TAXI ? */ 1767 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1768 printk(")\n"); 1769 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1770 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1771 error = -EINVAL; 1772 goto unmap; 1773 } 1774 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1775 if (error) 1776 goto unmap; 1777 for (i = 0; i < ESI_LEN; i++) 1778 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1779 printk(")\n"); 1780 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1781 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1782 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]); 1783 1784 error = suni_init(dev); 1785 if (error) 1786 goto unmap; 1787 out: 1788 return error; 1789 unmap: 1790 iounmap(base); 1791 goto out; 1792 } 1793 1794 static void eni_do_release(struct atm_dev *dev) 1795 { 1796 struct eni_dev *ed = ENI_DEV(dev); 1797 1798 dev->phy->stop(dev); 1799 dev->phy = NULL; 1800 iounmap(ed->ioaddr); 1801 } 1802 1803 static int eni_start(struct atm_dev *dev) 1804 { 1805 struct eni_dev *eni_dev; 1806 1807 void __iomem *buf; 1808 unsigned long buffer_mem; 1809 int error; 1810 1811 DPRINTK(">eni_start\n"); 1812 eni_dev = ENI_DEV(dev); 1813 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { 1814 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1815 dev->number,eni_dev->irq); 1816 error = -EAGAIN; 1817 goto out; 1818 } 1819 pci_set_master(eni_dev->pci_dev); 1820 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1821 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1822 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1823 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1824 "master (0x%02x)\n",dev->number,error); 1825 goto free_irq; 1826 } 1827 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1828 END_SWAP_DMA))) { 1829 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1830 "(0x%02x)\n",dev->number,error); 1831 goto free_irq; 1832 } 1833 /* determine addresses of internal tables */ 1834 eni_dev->vci = eni_dev->ram; 1835 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1836 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1837 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1838 buf = eni_dev->service+NR_SERVICE*4; 1839 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1840 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1841 eni_dev->service,buf); 1842 spin_lock_init(&eni_dev->lock); 1843 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1844 eni_dev->events = 0; 1845 /* initialize memory management */ 1846 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1847 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1848 eni_dev->free_list = kmalloc( 1849 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL); 1850 if (!eni_dev->free_list) { 1851 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1852 dev->number); 1853 error = -ENOMEM; 1854 goto free_irq; 1855 } 1856 eni_dev->free_len = 0; 1857 eni_put_free(eni_dev,buf,buffer_mem); 1858 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1859 /* 1860 * byte_addr free (k) 1861 * 0x00000000 512 VCI table 1862 * 0x00004000 496 RX DMA 1863 * 0x00005000 492 TX DMA 1864 * 0x00006000 488 service list 1865 * 0x00007000 484 buffers 1866 * 0x00080000 0 end (512kB) 1867 */ 1868 eni_out(0xffffffff,MID_IE); 1869 error = start_tx(dev); 1870 if (error) goto free_list; 1871 error = start_rx(dev); 1872 if (error) goto free_list; 1873 error = dev->phy->start(dev); 1874 if (error) goto free_list; 1875 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1876 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1877 MID_MC_S); 1878 /* Tonga uses SBus INTReq1 */ 1879 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1880 return 0; 1881 1882 free_list: 1883 kfree(eni_dev->free_list); 1884 1885 free_irq: 1886 free_irq(eni_dev->irq, dev); 1887 1888 out: 1889 return error; 1890 } 1891 1892 1893 static void eni_close(struct atm_vcc *vcc) 1894 { 1895 DPRINTK(">eni_close\n"); 1896 if (!ENI_VCC(vcc)) return; 1897 clear_bit(ATM_VF_READY,&vcc->flags); 1898 close_rx(vcc); 1899 close_tx(vcc); 1900 DPRINTK("eni_close: done waiting\n"); 1901 /* deallocate memory */ 1902 kfree(ENI_VCC(vcc)); 1903 vcc->dev_data = NULL; 1904 clear_bit(ATM_VF_ADDR,&vcc->flags); 1905 /*foo();*/ 1906 } 1907 1908 1909 static int eni_open(struct atm_vcc *vcc) 1910 { 1911 struct eni_vcc *eni_vcc; 1912 int error; 1913 short vpi = vcc->vpi; 1914 int vci = vcc->vci; 1915 1916 DPRINTK(">eni_open\n"); 1917 EVENT("eni_open\n",0,0); 1918 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1919 vcc->dev_data = NULL; 1920 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1921 set_bit(ATM_VF_ADDR,&vcc->flags); 1922 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1923 return -EINVAL; 1924 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1925 vcc->vci); 1926 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1927 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1928 if (!eni_vcc) return -ENOMEM; 1929 vcc->dev_data = eni_vcc; 1930 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1931 if ((error = open_rx_first(vcc))) { 1932 eni_close(vcc); 1933 return error; 1934 } 1935 if ((error = open_tx_first(vcc))) { 1936 eni_close(vcc); 1937 return error; 1938 } 1939 } 1940 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1941 if ((error = open_rx_second(vcc))) { 1942 eni_close(vcc); 1943 return error; 1944 } 1945 if ((error = open_tx_second(vcc))) { 1946 eni_close(vcc); 1947 return error; 1948 } 1949 set_bit(ATM_VF_READY,&vcc->flags); 1950 /* should power down SUNI while !ref_count @@@ */ 1951 return 0; 1952 } 1953 1954 1955 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1956 { 1957 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1958 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1959 struct sk_buff *skb; 1960 int error,rate,rsv,shp; 1961 1962 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1963 if (tx == eni_dev->ubr) return -EBADFD; 1964 rate = atm_pcr_goal(&qos->txtp); 1965 if (rate < 0) rate = -rate; 1966 rsv = shp = 0; 1967 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1968 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1969 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1970 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1971 if (!rsv && !shp) return 0; 1972 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1973 if (error) return error; 1974 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1975 /* 1976 * Walk through the send buffer and patch the rate information in all 1977 * segmentation buffer descriptors of this VCC. 1978 */ 1979 tasklet_disable(&eni_dev->task); 1980 skb_queue_walk(&eni_dev->tx_queue, skb) { 1981 void __iomem *dsc; 1982 1983 if (ATM_SKB(skb)->vcc != vcc) continue; 1984 dsc = tx->send+ENI_PRV_POS(skb)*4; 1985 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1986 (tx->prescaler << MID_SEG_PR_SHIFT) | 1987 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1988 } 1989 tasklet_enable(&eni_dev->task); 1990 return 0; 1991 } 1992 1993 1994 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1995 { 1996 struct eni_dev *eni_dev = ENI_DEV(dev); 1997 1998 if (cmd == ENI_MEMDUMP) { 1999 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2000 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 2001 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 2002 dump(dev); 2003 return 0; 2004 } 2005 if (cmd == ENI_SETMULT) { 2006 struct eni_multipliers mult; 2007 2008 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2009 if (copy_from_user(&mult, arg, 2010 sizeof(struct eni_multipliers))) 2011 return -EFAULT; 2012 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2013 mult.tx > 65536 || mult.rx > 65536) 2014 return -EINVAL; 2015 if (mult.tx) eni_dev->tx_mult = mult.tx; 2016 if (mult.rx) eni_dev->rx_mult = mult.rx; 2017 return 0; 2018 } 2019 if (cmd == ATM_SETCIRANGE) { 2020 struct atm_cirange ci; 2021 2022 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2023 return -EFAULT; 2024 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2025 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2026 return 0; 2027 return -EINVAL; 2028 } 2029 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2030 return dev->phy->ioctl(dev,cmd,arg); 2031 } 2032 2033 2034 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2035 void __user *optval,int optlen) 2036 { 2037 return -EINVAL; 2038 } 2039 2040 2041 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2042 void __user *optval,unsigned int optlen) 2043 { 2044 return -EINVAL; 2045 } 2046 2047 2048 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2049 { 2050 enum enq_res res; 2051 2052 DPRINTK(">eni_send\n"); 2053 if (!ENI_VCC(vcc)->tx) { 2054 if (vcc->pop) vcc->pop(vcc,skb); 2055 else dev_kfree_skb(skb); 2056 return -EINVAL; 2057 } 2058 if (!skb) { 2059 printk(KERN_CRIT "!skb in eni_send ?\n"); 2060 if (vcc->pop) vcc->pop(vcc,skb); 2061 return -EINVAL; 2062 } 2063 if (vcc->qos.aal == ATM_AAL0) { 2064 if (skb->len != ATM_CELL_SIZE-1) { 2065 if (vcc->pop) vcc->pop(vcc,skb); 2066 else dev_kfree_skb(skb); 2067 return -EINVAL; 2068 } 2069 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2070 } 2071 submitted++; 2072 ATM_SKB(skb)->vcc = vcc; 2073 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2074 res = do_tx(skb); 2075 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2076 if (res == enq_ok) return 0; 2077 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2078 backlogged++; 2079 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2080 return 0; 2081 } 2082 2083 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2084 unsigned long addr) 2085 { 2086 writel(value,ENI_DEV(dev)->phy+addr*4); 2087 } 2088 2089 2090 2091 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2092 { 2093 return readl(ENI_DEV(dev)->phy+addr*4); 2094 } 2095 2096 2097 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2098 { 2099 struct sock *s; 2100 static const char *signal[] = { "LOST","unknown","okay" }; 2101 struct eni_dev *eni_dev = ENI_DEV(dev); 2102 struct atm_vcc *vcc; 2103 int left,i; 2104 2105 left = *pos; 2106 if (!left) 2107 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2108 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2109 eni_dev->mem >> 10,eni_dev->tx_bw); 2110 if (!--left) 2111 return sprintf(page,"%4sBursts: TX" 2112 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2113 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2114 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2115 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2116 " none" 2117 #endif 2118 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2119 " 16W" 2120 #endif 2121 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2122 " 8W" 2123 #endif 2124 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2125 " 4W" 2126 #endif 2127 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2128 " 2W" 2129 #endif 2130 ", RX" 2131 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2132 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2133 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2134 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2135 " none" 2136 #endif 2137 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2138 " 16W" 2139 #endif 2140 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2141 " 8W" 2142 #endif 2143 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2144 " 4W" 2145 #endif 2146 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2147 " 2W" 2148 #endif 2149 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2150 " (default)" 2151 #endif 2152 "\n",""); 2153 if (!--left) 2154 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2155 "",eni_dev->tx_mult,eni_dev->rx_mult); 2156 for (i = 0; i < NR_CHAN; i++) { 2157 struct eni_tx *tx = eni_dev->tx+i; 2158 2159 if (!tx->send) continue; 2160 if (!--left) { 2161 return sprintf(page, "tx[%d]: 0x%lx-0x%lx " 2162 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2163 (unsigned long) (tx->send - eni_dev->ram), 2164 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2165 tx->reserved,tx->shaping, 2166 tx == eni_dev->ubr ? " (UBR)" : ""); 2167 } 2168 if (--left) continue; 2169 return sprintf(page,"%10sbacklog %u packets\n","", 2170 skb_queue_len(&tx->backlog)); 2171 } 2172 read_lock(&vcc_sklist_lock); 2173 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2174 struct hlist_head *head = &vcc_hash[i]; 2175 2176 sk_for_each(s, head) { 2177 struct eni_vcc *eni_vcc; 2178 int length; 2179 2180 vcc = atm_sk(s); 2181 if (vcc->dev != dev) 2182 continue; 2183 eni_vcc = ENI_VCC(vcc); 2184 if (--left) continue; 2185 length = sprintf(page,"vcc %4d: ",vcc->vci); 2186 if (eni_vcc->rx) { 2187 length += sprintf(page+length, "0x%lx-0x%lx " 2188 "(%6ld bytes)", 2189 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2190 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2191 eni_vcc->words*4); 2192 if (eni_vcc->tx) length += sprintf(page+length,", "); 2193 } 2194 if (eni_vcc->tx) 2195 length += sprintf(page+length,"tx[%d], txing %d bytes", 2196 eni_vcc->tx->index,eni_vcc->txing); 2197 page[length] = '\n'; 2198 read_unlock(&vcc_sklist_lock); 2199 return length+1; 2200 } 2201 } 2202 read_unlock(&vcc_sklist_lock); 2203 for (i = 0; i < eni_dev->free_len; i++) { 2204 struct eni_free *fe = eni_dev->free_list+i; 2205 unsigned long offset; 2206 2207 if (--left) continue; 2208 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2209 return sprintf(page,"free %p-%p (%6d bytes)\n", 2210 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2211 1 << fe->order); 2212 } 2213 return 0; 2214 } 2215 2216 2217 static const struct atmdev_ops ops = { 2218 .open = eni_open, 2219 .close = eni_close, 2220 .ioctl = eni_ioctl, 2221 .getsockopt = eni_getsockopt, 2222 .setsockopt = eni_setsockopt, 2223 .send = eni_send, 2224 .phy_put = eni_phy_put, 2225 .phy_get = eni_phy_get, 2226 .change_qos = eni_change_qos, 2227 .proc_read = eni_proc_read 2228 }; 2229 2230 2231 static int eni_init_one(struct pci_dev *pci_dev, 2232 const struct pci_device_id *ent) 2233 { 2234 struct atm_dev *dev; 2235 struct eni_dev *eni_dev; 2236 struct eni_zero *zero; 2237 int rc; 2238 2239 rc = pci_enable_device(pci_dev); 2240 if (rc < 0) 2241 goto out; 2242 2243 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); 2244 if (rc < 0) 2245 goto out; 2246 2247 rc = -ENOMEM; 2248 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); 2249 if (!eni_dev) 2250 goto err_disable; 2251 2252 zero = &eni_dev->zero; 2253 zero->addr = dma_alloc_coherent(&pci_dev->dev, 2254 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL); 2255 if (!zero->addr) 2256 goto err_kfree; 2257 2258 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); 2259 if (!dev) 2260 goto err_free_consistent; 2261 2262 dev->dev_data = eni_dev; 2263 pci_set_drvdata(pci_dev, dev); 2264 eni_dev->pci_dev = pci_dev; 2265 eni_dev->asic = ent->driver_data; 2266 2267 rc = eni_do_init(dev); 2268 if (rc < 0) 2269 goto err_unregister; 2270 2271 rc = eni_start(dev); 2272 if (rc < 0) 2273 goto err_eni_release; 2274 2275 eni_dev->more = eni_boards; 2276 eni_boards = dev; 2277 out: 2278 return rc; 2279 2280 err_eni_release: 2281 eni_do_release(dev); 2282 err_unregister: 2283 atm_dev_deregister(dev); 2284 err_free_consistent: 2285 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2286 err_kfree: 2287 kfree(eni_dev); 2288 err_disable: 2289 pci_disable_device(pci_dev); 2290 goto out; 2291 } 2292 2293 2294 static struct pci_device_id eni_pci_tbl[] = { 2295 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, 2296 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, 2297 { 0, } 2298 }; 2299 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2300 2301 2302 static void eni_remove_one(struct pci_dev *pdev) 2303 { 2304 struct atm_dev *dev = pci_get_drvdata(pdev); 2305 struct eni_dev *ed = ENI_DEV(dev); 2306 struct eni_zero *zero = &ed->zero; 2307 2308 eni_do_release(dev); 2309 atm_dev_deregister(dev); 2310 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2311 kfree(ed); 2312 pci_disable_device(pdev); 2313 } 2314 2315 2316 static struct pci_driver eni_driver = { 2317 .name = DEV_LABEL, 2318 .id_table = eni_pci_tbl, 2319 .probe = eni_init_one, 2320 .remove = eni_remove_one, 2321 }; 2322 2323 2324 static int __init eni_init(void) 2325 { 2326 struct sk_buff *skb; /* dummy for sizeof */ 2327 2328 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) { 2329 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n", 2330 sizeof(skb->cb),sizeof(struct eni_skb_prv)); 2331 return -EIO; 2332 } 2333 return pci_register_driver(&eni_driver); 2334 } 2335 2336 2337 module_init(eni_init); 2338 /* @@@ since exit routine not defined, this module can not be unloaded */ 2339 2340 MODULE_LICENSE("GPL"); 2341