1 // SPDX-License-Identifier: GPL-2.0-only 2 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ 3 4 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 5 6 7 #include <linux/module.h> 8 #include <linux/kernel.h> 9 #include <linux/mm.h> 10 #include <linux/pci.h> 11 #include <linux/errno.h> 12 #include <linux/atm.h> 13 #include <linux/atmdev.h> 14 #include <linux/sonet.h> 15 #include <linux/skbuff.h> 16 #include <linux/time.h> 17 #include <linux/delay.h> 18 #include <linux/uio.h> 19 #include <linux/init.h> 20 #include <linux/atm_eni.h> 21 #include <linux/bitops.h> 22 #include <linux/slab.h> 23 #include <asm/io.h> 24 #include <linux/atomic.h> 25 #include <linux/uaccess.h> 26 #include <asm/string.h> 27 #include <asm/byteorder.h> 28 29 #include "tonga.h" 30 #include "midway.h" 31 #include "suni.h" 32 #include "eni.h" 33 34 /* 35 * TODO: 36 * 37 * Show stoppers 38 * none 39 * 40 * Minor 41 * - OAM support 42 * - fix bugs listed below 43 */ 44 45 /* 46 * KNOWN BUGS: 47 * 48 * - may run into JK-JK bug and deadlock 49 * - should allocate UBR channel first 50 * - buffer space allocation algorithm is stupid 51 * (RX: should be maxSDU+maxdelay*rate 52 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 53 * - doesn't support OAM cells 54 * - eni_put_free may hang if not putting memory fragments that _complete_ 55 * 2^n block (never happens in real life, though) 56 */ 57 58 59 #if 0 60 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 61 #else 62 #define DPRINTK(format,args...) 63 #endif 64 65 66 #ifndef CONFIG_ATM_ENI_TUNE_BURST 67 #define CONFIG_ATM_ENI_BURST_TX_8W 68 #define CONFIG_ATM_ENI_BURST_RX_4W 69 #endif 70 71 72 #ifndef CONFIG_ATM_ENI_DEBUG 73 74 75 #define NULLCHECK(x) 76 77 #define EVENT(s,a,b) 78 79 80 static void event_dump(void) 81 { 82 } 83 84 85 #else 86 87 88 /* 89 * NULL pointer checking 90 */ 91 92 #define NULLCHECK(x) \ 93 if ((unsigned long) (x) < 0x30) \ 94 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 95 96 /* 97 * Very extensive activity logging. Greatly improves bug detection speed but 98 * costs a few Mbps if enabled. 99 */ 100 101 #define EV 64 102 103 static const char *ev[EV]; 104 static unsigned long ev_a[EV],ev_b[EV]; 105 static int ec = 0; 106 107 108 static void EVENT(const char *s,unsigned long a,unsigned long b) 109 { 110 ev[ec] = s; 111 ev_a[ec] = a; 112 ev_b[ec] = b; 113 ec = (ec+1) % EV; 114 } 115 116 117 static void event_dump(void) 118 { 119 int n,i; 120 121 for (n = 0; n < EV; n++) { 122 i = (ec+n) % EV; 123 printk(KERN_NOTICE); 124 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 125 } 126 } 127 128 129 #endif /* CONFIG_ATM_ENI_DEBUG */ 130 131 132 /* 133 * NExx must not be equal at end 134 * EExx may be equal at end 135 * xxPJOK verify validity of pointer jumps 136 * xxPMOK operating on a circular buffer of "c" words 137 */ 138 139 #define NEPJOK(a0,a1,b) \ 140 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 141 #define EEPJOK(a0,a1,b) \ 142 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 143 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 144 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 145 146 147 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 148 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 149 putting = 0; 150 151 static struct atm_dev *eni_boards = NULL; 152 153 /* Read/write registers on card */ 154 #define eni_in(r) readl(eni_dev->reg+(r)*4) 155 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) 156 157 158 /*-------------------------------- utilities --------------------------------*/ 159 160 161 static void dump_mem(struct eni_dev *eni_dev) 162 { 163 int i; 164 165 for (i = 0; i < eni_dev->free_len; i++) 166 printk(KERN_DEBUG " %d: %p %d\n",i, 167 eni_dev->free_list[i].start, 168 1 << eni_dev->free_list[i].order); 169 } 170 171 172 static void dump(struct atm_dev *dev) 173 { 174 struct eni_dev *eni_dev; 175 176 int i; 177 178 eni_dev = ENI_DEV(dev); 179 printk(KERN_NOTICE "Free memory\n"); 180 dump_mem(eni_dev); 181 printk(KERN_NOTICE "TX buffers\n"); 182 for (i = 0; i < NR_CHAN; i++) 183 if (eni_dev->tx[i].send) 184 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, 185 eni_dev->tx[i].send,eni_dev->tx[i].words*4); 186 printk(KERN_NOTICE "RX buffers\n"); 187 for (i = 0; i < 1024; i++) 188 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) 189 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, 190 ENI_VCC(eni_dev->rx_map[i])->recv, 191 ENI_VCC(eni_dev->rx_map[i])->words*4); 192 printk(KERN_NOTICE "----\n"); 193 } 194 195 196 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, 197 unsigned long size) 198 { 199 struct eni_free *list; 200 int len,order; 201 202 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); 203 start += eni_dev->base_diff; 204 list = eni_dev->free_list; 205 len = eni_dev->free_len; 206 while (size) { 207 if (len >= eni_dev->free_list_size) { 208 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", 209 start,size); 210 break; 211 } 212 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); 213 if (MID_MIN_BUF_SIZE > (1 << order)) { 214 printk(KERN_CRIT "eni_put_free: order %d too small\n", 215 order); 216 break; 217 } 218 list[len].start = (void __iomem *) start; 219 list[len].order = order; 220 len++; 221 start += 1 << order; 222 size -= 1 << order; 223 } 224 eni_dev->free_len = len; 225 /*dump_mem(eni_dev);*/ 226 } 227 228 229 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) 230 { 231 struct eni_free *list; 232 void __iomem *start; 233 int len,i,order,best_order,index; 234 235 list = eni_dev->free_list; 236 len = eni_dev->free_len; 237 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; 238 if (*size > MID_MAX_BUF_SIZE) return NULL; 239 for (order = 0; (1 << order) < *size; order++) 240 ; 241 DPRINTK("trying: %ld->%d\n",*size,order); 242 best_order = 65; /* we don't have more than 2^64 of anything ... */ 243 index = 0; /* silence GCC */ 244 for (i = 0; i < len; i++) 245 if (list[i].order == order) { 246 best_order = order; 247 index = i; 248 break; 249 } 250 else if (best_order > list[i].order && list[i].order > order) { 251 best_order = list[i].order; 252 index = i; 253 } 254 if (best_order == 65) return NULL; 255 start = list[index].start-eni_dev->base_diff; 256 list[index] = list[--len]; 257 eni_dev->free_len = len; 258 *size = 1 << order; 259 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 260 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 261 memset_io(start,0,*size); /* never leak data */ 262 /*dump_mem(eni_dev);*/ 263 return start; 264 } 265 266 267 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 268 unsigned long size) 269 { 270 struct eni_free *list; 271 int len,i,order; 272 273 start += eni_dev->base_diff; 274 list = eni_dev->free_list; 275 len = eni_dev->free_len; 276 for (order = -1; size; order++) size >>= 1; 277 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 278 for (i = 0; i < len; i++) 279 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 280 list[i].order == order) { 281 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 282 list[i].start,start,1 << order,list[i].order,order); 283 list[i] = list[--len]; 284 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 285 order++; 286 i = -1; 287 continue; 288 } 289 if (len >= eni_dev->free_list_size) { 290 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 291 order); 292 return; 293 } 294 list[len].start = start; 295 list[len].order = order; 296 eni_dev->free_len = len+1; 297 /*dump_mem(eni_dev);*/ 298 } 299 300 301 /*----------------------------------- RX ------------------------------------*/ 302 303 304 #define ENI_VCC_NOS ((struct atm_vcc *) 1) 305 306 307 static void rx_ident_err(struct atm_vcc *vcc) 308 { 309 struct atm_dev *dev; 310 struct eni_dev *eni_dev; 311 struct eni_vcc *eni_vcc; 312 313 dev = vcc->dev; 314 eni_dev = ENI_DEV(dev); 315 /* immediately halt adapter */ 316 eni_out(eni_in(MID_MC_S) & 317 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 318 /* dump useful information */ 319 eni_vcc = ENI_VCC(vcc); 320 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 321 "mismatch\n",dev->number); 322 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 323 eni_vcc->rxing,eni_vcc->words); 324 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 325 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 326 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 327 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 328 eni_vcc->servicing); 329 EVENT("---dump ends here---\n",0,0); 330 printk(KERN_NOTICE "---recent events---\n"); 331 event_dump(); 332 ENI_DEV(dev)->fast = NULL; /* really stop it */ 333 ENI_DEV(dev)->slow = NULL; 334 skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 335 } 336 337 338 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 339 unsigned long skip,unsigned long size,unsigned long eff) 340 { 341 struct eni_dev *eni_dev; 342 struct eni_vcc *eni_vcc; 343 u32 dma_rd,dma_wr; 344 u32 dma[RX_DMA_BUF*2]; 345 dma_addr_t paddr; 346 unsigned long here; 347 int i,j; 348 349 eni_dev = ENI_DEV(vcc->dev); 350 eni_vcc = ENI_VCC(vcc); 351 paddr = 0; /* GCC, shut up */ 352 if (skb) { 353 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 354 DMA_FROM_DEVICE); 355 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) 356 goto dma_map_error; 357 ENI_PRV_PADDR(skb) = paddr; 358 if (paddr & 3) 359 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 360 "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 361 vcc->vci,(unsigned long) paddr); 362 ENI_PRV_SIZE(skb) = size+skip; 363 /* PDU plus descriptor */ 364 ATM_SKB(skb)->vcc = vcc; 365 } 366 j = 0; 367 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 368 here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 369 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 370 << MID_DMA_VCI_SHIFT) | MID_DT_JK; 371 dma[j++] = 0; 372 } 373 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 374 if (!eff) size += skip; 375 else { 376 unsigned long words; 377 378 if (!size) { 379 DPRINTK("strange things happen ...\n"); 380 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 381 size,eff); 382 } 383 words = eff; 384 if (paddr & 15) { 385 unsigned long init; 386 387 init = 4-((paddr & 15) >> 2); 388 if (init > words) init = words; 389 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 390 (vcc->vci << MID_DMA_VCI_SHIFT); 391 dma[j++] = paddr; 392 paddr += init << 2; 393 words -= init; 394 } 395 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 396 if (words & ~15) { 397 dma[j++] = MID_DT_16W | ((words >> 4) << 398 MID_DMA_COUNT_SHIFT) | (vcc->vci << 399 MID_DMA_VCI_SHIFT); 400 dma[j++] = paddr; 401 paddr += (words & ~15) << 2; 402 words &= 15; 403 } 404 #endif 405 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 406 if (words & ~7) { 407 dma[j++] = MID_DT_8W | ((words >> 3) << 408 MID_DMA_COUNT_SHIFT) | (vcc->vci << 409 MID_DMA_VCI_SHIFT); 410 dma[j++] = paddr; 411 paddr += (words & ~7) << 2; 412 words &= 7; 413 } 414 #endif 415 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 416 if (words & ~3) { 417 dma[j++] = MID_DT_4W | ((words >> 2) << 418 MID_DMA_COUNT_SHIFT) | (vcc->vci << 419 MID_DMA_VCI_SHIFT); 420 dma[j++] = paddr; 421 paddr += (words & ~3) << 2; 422 words &= 3; 423 } 424 #endif 425 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 426 if (words & ~1) { 427 dma[j++] = MID_DT_2W | ((words >> 1) << 428 MID_DMA_COUNT_SHIFT) | (vcc->vci << 429 MID_DMA_VCI_SHIFT); 430 dma[j++] = paddr; 431 paddr += (words & ~1) << 2; 432 words &= 1; 433 } 434 #endif 435 if (words) { 436 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 437 | (vcc->vci << MID_DMA_VCI_SHIFT); 438 dma[j++] = paddr; 439 } 440 } 441 if (size != eff) { 442 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 443 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 444 dma[j++] = 0; 445 } 446 if (!j || j > 2*RX_DMA_BUF) { 447 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 448 goto trouble; 449 } 450 dma[j-2] |= MID_DMA_END; 451 j = j >> 1; 452 dma_wr = eni_in(MID_DMA_WR_RX); 453 dma_rd = eni_in(MID_DMA_RD_RX); 454 /* 455 * Can I move the dma_wr pointer by 2j+1 positions without overwriting 456 * data that hasn't been read (position of dma_rd) yet ? 457 */ 458 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 459 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 460 vcc->dev->number); 461 goto trouble; 462 } 463 for (i = 0; i < j; i++) { 464 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 465 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 466 dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 467 } 468 if (skb) { 469 ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 470 skb_queue_tail(&eni_dev->rx_queue,skb); 471 eni_vcc->last = skb; 472 rx_enqueued++; 473 } 474 eni_vcc->descr = here; 475 eni_out(dma_wr,MID_DMA_WR_RX); 476 return 0; 477 478 trouble: 479 if (paddr) 480 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, 481 DMA_FROM_DEVICE); 482 dma_map_error: 483 if (skb) dev_kfree_skb_irq(skb); 484 return -1; 485 } 486 487 488 static void discard(struct atm_vcc *vcc,unsigned long size) 489 { 490 struct eni_vcc *eni_vcc; 491 492 eni_vcc = ENI_VCC(vcc); 493 EVENT("discard (size=%ld)\n",size,0); 494 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); 495 /* could do a full fallback, but that might be more expensive */ 496 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; 497 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); 498 } 499 500 501 /* 502 * TODO: should check whether direct copies (without DMA setup, dequeuing on 503 * interrupt, etc.) aren't much faster for AAL0 504 */ 505 506 static int rx_aal0(struct atm_vcc *vcc) 507 { 508 struct eni_vcc *eni_vcc; 509 unsigned long descr; 510 unsigned long length; 511 struct sk_buff *skb; 512 513 DPRINTK(">rx_aal0\n"); 514 eni_vcc = ENI_VCC(vcc); 515 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 516 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 517 rx_ident_err(vcc); 518 return 1; 519 } 520 if (descr & MID_RED_T) { 521 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 522 vcc->dev->number); 523 length = 0; 524 atomic_inc(&vcc->stats->rx_err); 525 } 526 else { 527 length = ATM_CELL_SIZE-1; /* no HEC */ 528 } 529 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; 530 if (!skb) { 531 discard(vcc,length >> 2); 532 return 0; 533 } 534 skb_put(skb,length); 535 skb->tstamp = eni_vcc->timestamp; 536 DPRINTK("got len %ld\n",length); 537 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; 538 eni_vcc->rxing++; 539 return 0; 540 } 541 542 543 static int rx_aal5(struct atm_vcc *vcc) 544 { 545 struct eni_vcc *eni_vcc; 546 unsigned long descr; 547 unsigned long size,eff,length; 548 struct sk_buff *skb; 549 550 EVENT("rx_aal5\n",0,0); 551 DPRINTK(">rx_aal5\n"); 552 eni_vcc = ENI_VCC(vcc); 553 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 554 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 555 rx_ident_err(vcc); 556 return 1; 557 } 558 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { 559 if (descr & MID_RED_T) { 560 EVENT("empty cell (descr=0x%lx)\n",descr,0); 561 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 562 vcc->dev->number); 563 size = 0; 564 } 565 else { 566 static unsigned long silence = 0; 567 568 if (time_after(jiffies, silence) || silence == 0) { 569 printk(KERN_WARNING DEV_LABEL "(itf %d): " 570 "discarding PDU(s) with CRC error\n", 571 vcc->dev->number); 572 silence = (jiffies+2*HZ)|1; 573 } 574 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 575 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, 576 size); 577 } 578 eff = length = 0; 579 atomic_inc(&vcc->stats->rx_err); 580 } 581 else { 582 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 583 DPRINTK("size=%ld\n",size); 584 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & 585 (eni_vcc->words-1)))*4) & 0xffff; 586 /* -trailer(2)+header(1) */ 587 if (length && length <= (size << 2)-8 && length <= 588 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; 589 else { /* ^ trailer length (8) */ 590 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, 591 length); 592 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " 593 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", 594 vcc->dev->number,vcc->vci,length,size << 2,descr); 595 length = eff = 0; 596 atomic_inc(&vcc->stats->rx_err); 597 } 598 } 599 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; 600 if (!skb) { 601 discard(vcc,size); 602 return 0; 603 } 604 skb_put(skb,length); 605 DPRINTK("got len %ld\n",length); 606 if (do_rx_dma(vcc,skb,1,size,eff)) return 1; 607 eni_vcc->rxing++; 608 return 0; 609 } 610 611 612 static inline int rx_vcc(struct atm_vcc *vcc) 613 { 614 void __iomem *vci_dsc; 615 unsigned long tmp; 616 struct eni_vcc *eni_vcc; 617 618 eni_vcc = ENI_VCC(vcc); 619 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; 620 EVENT("rx_vcc(1)\n",0,0); 621 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> 622 MID_VCI_DESCR_SHIFT)) { 623 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", 624 eni_vcc->descr,tmp); 625 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 626 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 627 MID_VCI_DESCR_SHIFT)); 628 if (ENI_VCC(vcc)->rx(vcc)) return 1; 629 } 630 /* clear IN_SERVICE flag */ 631 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); 632 /* 633 * If new data has arrived between evaluating the while condition and 634 * clearing IN_SERVICE, we wouldn't be notified until additional data 635 * follows. So we have to loop again to be sure. 636 */ 637 EVENT("rx_vcc(3)\n",0,0); 638 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) 639 >> MID_VCI_DESCR_SHIFT)) { 640 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", 641 eni_vcc->descr,tmp); 642 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 643 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 644 MID_VCI_DESCR_SHIFT)); 645 if (ENI_VCC(vcc)->rx(vcc)) return 1; 646 } 647 return 0; 648 } 649 650 651 static void poll_rx(struct atm_dev *dev) 652 { 653 struct eni_dev *eni_dev; 654 struct atm_vcc *curr; 655 656 eni_dev = ENI_DEV(dev); 657 while ((curr = eni_dev->fast)) { 658 EVENT("poll_rx.fast\n",0,0); 659 if (rx_vcc(curr)) return; 660 eni_dev->fast = ENI_VCC(curr)->next; 661 ENI_VCC(curr)->next = ENI_VCC_NOS; 662 barrier(); 663 ENI_VCC(curr)->servicing--; 664 } 665 while ((curr = eni_dev->slow)) { 666 EVENT("poll_rx.slow\n",0,0); 667 if (rx_vcc(curr)) return; 668 eni_dev->slow = ENI_VCC(curr)->next; 669 ENI_VCC(curr)->next = ENI_VCC_NOS; 670 barrier(); 671 ENI_VCC(curr)->servicing--; 672 } 673 } 674 675 676 static void get_service(struct atm_dev *dev) 677 { 678 struct eni_dev *eni_dev; 679 struct atm_vcc *vcc; 680 unsigned long vci; 681 682 DPRINTK(">get_service\n"); 683 eni_dev = ENI_DEV(dev); 684 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { 685 vci = readl(eni_dev->service+eni_dev->serv_read*4); 686 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); 687 vcc = eni_dev->rx_map[vci & 1023]; 688 if (!vcc) { 689 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " 690 "found\n",dev->number,vci); 691 continue; /* nasty but we try to go on anyway */ 692 /* @@@ nope, doesn't work */ 693 } 694 EVENT("getting from service\n",0,0); 695 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { 696 EVENT("double service\n",0,0); 697 DPRINTK("Grr, servicing VCC %ld twice\n",vci); 698 continue; 699 } 700 ENI_VCC(vcc)->timestamp = ktime_get_real(); 701 ENI_VCC(vcc)->next = NULL; 702 if (vcc->qos.rxtp.traffic_class == ATM_CBR) { 703 if (eni_dev->fast) 704 ENI_VCC(eni_dev->last_fast)->next = vcc; 705 else eni_dev->fast = vcc; 706 eni_dev->last_fast = vcc; 707 } 708 else { 709 if (eni_dev->slow) 710 ENI_VCC(eni_dev->last_slow)->next = vcc; 711 else eni_dev->slow = vcc; 712 eni_dev->last_slow = vcc; 713 } 714 putting++; 715 ENI_VCC(vcc)->servicing++; 716 } 717 } 718 719 720 static void dequeue_rx(struct atm_dev *dev) 721 { 722 struct eni_dev *eni_dev; 723 struct eni_vcc *eni_vcc; 724 struct atm_vcc *vcc; 725 struct sk_buff *skb; 726 void __iomem *vci_dsc; 727 int first; 728 729 eni_dev = ENI_DEV(dev); 730 first = 1; 731 while (1) { 732 skb = skb_dequeue(&eni_dev->rx_queue); 733 if (!skb) { 734 if (first) { 735 DPRINTK(DEV_LABEL "(itf %d): RX but not " 736 "rxing\n",dev->number); 737 EVENT("nothing to dequeue\n",0,0); 738 } 739 break; 740 } 741 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), 742 ENI_PRV_POS(skb)); 743 rx_dequeued++; 744 vcc = ATM_SKB(skb)->vcc; 745 eni_vcc = ENI_VCC(vcc); 746 first = 0; 747 vci_dsc = eni_dev->vci+vcc->vci*16; 748 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), 749 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, 750 eni_vcc->words)) { 751 EVENT("requeuing\n",0,0); 752 skb_queue_head(&eni_dev->rx_queue,skb); 753 break; 754 } 755 eni_vcc->rxing--; 756 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); 757 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 758 DMA_TO_DEVICE); 759 if (!skb->len) dev_kfree_skb_irq(skb); 760 else { 761 EVENT("pushing (len=%ld)\n",skb->len,0); 762 if (vcc->qos.aal == ATM_AAL0) 763 *(unsigned long *) skb->data = 764 ntohl(*(unsigned long *) skb->data); 765 memset(skb->cb,0,sizeof(struct eni_skb_prv)); 766 vcc->push(vcc,skb); 767 pushed++; 768 } 769 atomic_inc(&vcc->stats->rx); 770 } 771 wake_up(&eni_dev->rx_wait); 772 } 773 774 775 static int open_rx_first(struct atm_vcc *vcc) 776 { 777 struct eni_dev *eni_dev; 778 struct eni_vcc *eni_vcc; 779 unsigned long size; 780 781 DPRINTK("open_rx_first\n"); 782 eni_dev = ENI_DEV(vcc->dev); 783 eni_vcc = ENI_VCC(vcc); 784 eni_vcc->rx = NULL; 785 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; 786 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; 787 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= 788 MID_MAX_BUF_SIZE) 789 size = MID_MAX_BUF_SIZE; 790 eni_vcc->recv = eni_alloc_mem(eni_dev,&size); 791 DPRINTK("rx at 0x%lx\n",eni_vcc->recv); 792 eni_vcc->words = size >> 2; 793 if (!eni_vcc->recv) return -ENOBUFS; 794 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; 795 eni_vcc->descr = 0; 796 eni_vcc->rx_pos = 0; 797 eni_vcc->rxing = 0; 798 eni_vcc->servicing = 0; 799 eni_vcc->next = ENI_VCC_NOS; 800 return 0; 801 } 802 803 804 static int open_rx_second(struct atm_vcc *vcc) 805 { 806 void __iomem *here; 807 struct eni_dev *eni_dev; 808 struct eni_vcc *eni_vcc; 809 unsigned long size; 810 int order; 811 812 DPRINTK("open_rx_second\n"); 813 eni_dev = ENI_DEV(vcc->dev); 814 eni_vcc = ENI_VCC(vcc); 815 if (!eni_vcc->rx) return 0; 816 /* set up VCI descriptor */ 817 here = eni_dev->vci+vcc->vci*16; 818 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); 819 size = eni_vcc->words >> 8; 820 for (order = -1; size; order++) size >>= 1; 821 writel(0,here+4); /* descr, read = 0 */ 822 writel(0,here+8); /* write, state, count = 0 */ 823 if (eni_dev->rx_map[vcc->vci]) 824 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " 825 "in use\n",vcc->dev->number,vcc->vci); 826 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ 827 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << 828 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | 829 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << 830 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); 831 return 0; 832 } 833 834 835 static void close_rx(struct atm_vcc *vcc) 836 { 837 DECLARE_WAITQUEUE(wait,current); 838 void __iomem *here; 839 struct eni_dev *eni_dev; 840 struct eni_vcc *eni_vcc; 841 842 eni_vcc = ENI_VCC(vcc); 843 if (!eni_vcc->rx) return; 844 eni_dev = ENI_DEV(vcc->dev); 845 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { 846 here = eni_dev->vci+vcc->vci*16; 847 /* block receiver */ 848 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << 849 MID_VCI_MODE_SHIFT),here); 850 /* wait for receiver to become idle */ 851 udelay(27); 852 /* discard pending cell */ 853 writel(readl(here) & ~MID_VCI_IN_SERVICE,here); 854 /* don't accept any new ones */ 855 eni_dev->rx_map[vcc->vci] = NULL; 856 /* wait for RX queue to drain */ 857 DPRINTK("eni_close: waiting for RX ...\n"); 858 EVENT("RX closing\n",0,0); 859 add_wait_queue(&eni_dev->rx_wait,&wait); 860 set_current_state(TASK_UNINTERRUPTIBLE); 861 barrier(); 862 for (;;) { 863 /* transition service->rx: rxing++, servicing-- */ 864 if (!eni_vcc->servicing) { 865 barrier(); 866 if (!eni_vcc->rxing) break; 867 } 868 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, 869 eni_vcc->servicing); 870 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, 871 eni_vcc->rxing); 872 schedule(); 873 set_current_state(TASK_UNINTERRUPTIBLE); 874 } 875 for (;;) { 876 int at_end; 877 u32 tmp; 878 879 tasklet_disable(&eni_dev->task); 880 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; 881 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; 882 tasklet_enable(&eni_dev->task); 883 if (at_end) break; 884 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", 885 eni_vcc->rx_pos,tmp); 886 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", 887 eni_vcc->rx_pos,tmp); 888 schedule(); 889 set_current_state(TASK_UNINTERRUPTIBLE); 890 } 891 set_current_state(TASK_RUNNING); 892 remove_wait_queue(&eni_dev->rx_wait,&wait); 893 } 894 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); 895 eni_vcc->rx = NULL; 896 } 897 898 899 static int start_rx(struct atm_dev *dev) 900 { 901 struct eni_dev *eni_dev; 902 903 eni_dev = ENI_DEV(dev); 904 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); 905 if (!eni_dev->rx_map) { 906 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 907 dev->number); 908 free_page((unsigned long) eni_dev->free_list); 909 return -ENOMEM; 910 } 911 eni_dev->rx_mult = DEFAULT_RX_MULT; 912 eni_dev->fast = eni_dev->last_fast = NULL; 913 eni_dev->slow = eni_dev->last_slow = NULL; 914 init_waitqueue_head(&eni_dev->rx_wait); 915 skb_queue_head_init(&eni_dev->rx_queue); 916 eni_dev->serv_read = eni_in(MID_SERV_WRITE); 917 eni_out(0,MID_DMA_WR_RX); 918 return 0; 919 } 920 921 922 /*----------------------------------- TX ------------------------------------*/ 923 924 925 enum enq_res { enq_ok,enq_next,enq_jam }; 926 927 928 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 929 u32 size) 930 { 931 u32 init,words; 932 933 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 934 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 935 #if 0 /* don't complain anymore */ 936 if (paddr & 3) 937 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 938 if (size & 3) 939 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 940 #endif 941 if (paddr & 3) { 942 init = 4-(paddr & 3); 943 if (init > size || size < 7) init = size; 944 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 945 (unsigned long) paddr,init,size); 946 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 947 (chan << MID_DMA_CHAN_SHIFT); 948 dma[(*j)++] = paddr; 949 paddr += init; 950 size -= init; 951 } 952 words = size >> 2; 953 size &= 3; 954 if (words && (paddr & 31)) { 955 init = 8-((paddr & 31) >> 2); 956 if (init > words) init = words; 957 DPRINTK("put_dma: %lx DMA: %d/%d words\n", 958 (unsigned long) paddr,init,words); 959 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 960 (chan << MID_DMA_CHAN_SHIFT); 961 dma[(*j)++] = paddr; 962 paddr += init << 2; 963 words -= init; 964 } 965 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 966 if (words & ~15) { 967 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 968 (unsigned long) paddr,words >> 4,words); 969 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 970 | (chan << MID_DMA_CHAN_SHIFT); 971 dma[(*j)++] = paddr; 972 paddr += (words & ~15) << 2; 973 words &= 15; 974 } 975 #endif 976 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 977 if (words & ~7) { 978 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 979 (unsigned long) paddr,words >> 3,words); 980 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 981 | (chan << MID_DMA_CHAN_SHIFT); 982 dma[(*j)++] = paddr; 983 paddr += (words & ~7) << 2; 984 words &= 7; 985 } 986 #endif 987 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 988 if (words & ~3) { 989 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 990 (unsigned long) paddr,words >> 2,words); 991 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 992 | (chan << MID_DMA_CHAN_SHIFT); 993 dma[(*j)++] = paddr; 994 paddr += (words & ~3) << 2; 995 words &= 3; 996 } 997 #endif 998 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 999 if (words & ~1) { 1000 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 1001 (unsigned long) paddr,words >> 1,words); 1002 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 1003 | (chan << MID_DMA_CHAN_SHIFT); 1004 dma[(*j)++] = paddr; 1005 paddr += (words & ~1) << 2; 1006 words &= 1; 1007 } 1008 #endif 1009 if (words) { 1010 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 1011 words); 1012 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 1013 (chan << MID_DMA_CHAN_SHIFT); 1014 dma[(*j)++] = paddr; 1015 paddr += words << 2; 1016 } 1017 if (size) { 1018 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 1019 size); 1020 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 1021 (chan << MID_DMA_CHAN_SHIFT); 1022 dma[(*j)++] = paddr; 1023 } 1024 } 1025 1026 1027 static enum enq_res do_tx(struct sk_buff *skb) 1028 { 1029 struct atm_vcc *vcc; 1030 struct eni_dev *eni_dev; 1031 struct eni_vcc *eni_vcc; 1032 struct eni_tx *tx; 1033 dma_addr_t paddr; 1034 u32 dma_rd,dma_wr; 1035 u32 size; /* in words */ 1036 int aal5,dma_size,i,j; 1037 1038 DPRINTK(">do_tx\n"); 1039 NULLCHECK(skb); 1040 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1041 vcc = ATM_SKB(skb)->vcc; 1042 NULLCHECK(vcc); 1043 eni_dev = ENI_DEV(vcc->dev); 1044 NULLCHECK(eni_dev); 1045 eni_vcc = ENI_VCC(vcc); 1046 tx = eni_vcc->tx; 1047 NULLCHECK(tx); 1048 #if 0 /* Enable this for testing with the "align" program */ 1049 { 1050 unsigned int hack = *((char *) skb->data)-'0'; 1051 1052 if (hack < 8) { 1053 skb->data += hack; 1054 skb->len -= hack; 1055 } 1056 } 1057 #endif 1058 #if 0 /* should work now */ 1059 if ((unsigned long) skb->data & 3) 1060 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1061 "TX data\n",vcc->dev->number,vcc->vci); 1062 #endif 1063 /* 1064 * Potential future IP speedup: make hard_header big enough to put 1065 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1066 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1067 */ 1068 1069 aal5 = vcc->qos.aal == ATM_AAL5; 1070 /* check space in buffer */ 1071 if (!aal5) 1072 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1073 /* cell without HEC plus segmentation header (includes 1074 four-byte cell header) */ 1075 else { 1076 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1077 /* add AAL5 trailer */ 1078 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1079 /* add segmentation header */ 1080 } 1081 /* 1082 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1083 * to the read pointer ? TX_GAP means to leave some space for what 1084 * the manual calls "too close". 1085 */ 1086 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1087 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1088 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1089 vcc->dev->number,size); 1090 return enq_next; 1091 } 1092 /* check DMA */ 1093 dma_wr = eni_in(MID_DMA_WR_TX); 1094 dma_rd = eni_in(MID_DMA_RD_TX); 1095 dma_size = 3; /* JK for descriptor and final fill, plus final size 1096 mis-alignment fix */ 1097 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1098 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1099 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1100 if (dma_size > TX_DMA_BUF) { 1101 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1102 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1103 } 1104 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1105 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1106 dma_size) { 1107 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1108 vcc->dev->number); 1109 return enq_jam; 1110 } 1111 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 1112 DMA_TO_DEVICE); 1113 ENI_PRV_PADDR(skb) = paddr; 1114 /* prepare DMA queue entries */ 1115 j = 0; 1116 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1117 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1118 MID_DT_JK; 1119 j++; 1120 if (!skb_shinfo(skb)->nr_frags) 1121 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1122 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1123 else { 1124 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1125 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1126 if (i == -1) 1127 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1128 skb->data, 1129 skb_headlen(skb)); 1130 else 1131 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1132 skb_frag_page(&skb_shinfo(skb)->frags[i]) + 1133 skb_frag_off(&skb_shinfo(skb)->frags[i]), 1134 skb_frag_size(&skb_shinfo(skb)->frags[i])); 1135 } 1136 if (skb->len & 3) { 1137 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma, 1138 4 - (skb->len & 3)); 1139 } 1140 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1141 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1142 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1143 MID_DMA_END | MID_DT_JK; 1144 j++; 1145 DPRINTK("DMA at end: %d\n",j); 1146 /* store frame */ 1147 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1148 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1149 (tx->resolution << MID_SEG_RATE_SHIFT) | 1150 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1151 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1152 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1153 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1154 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1155 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1156 DPRINTK("size: %d, len:%d\n",size,skb->len); 1157 if (aal5) 1158 writel(skb->len,tx->send+ 1159 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1160 j = j >> 1; 1161 for (i = 0; i < j; i++) { 1162 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1163 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1164 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1165 } 1166 ENI_PRV_POS(skb) = tx->tx_pos; 1167 ENI_PRV_SIZE(skb) = size; 1168 ENI_VCC(vcc)->txing += size; 1169 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1170 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1171 eni_out(dma_wr,MID_DMA_WR_TX); 1172 skb_queue_tail(&eni_dev->tx_queue,skb); 1173 queued++; 1174 return enq_ok; 1175 } 1176 1177 1178 static void poll_tx(struct atm_dev *dev) 1179 { 1180 struct eni_tx *tx; 1181 struct sk_buff *skb; 1182 enum enq_res res; 1183 int i; 1184 1185 DPRINTK(">poll_tx\n"); 1186 for (i = NR_CHAN-1; i >= 0; i--) { 1187 tx = &ENI_DEV(dev)->tx[i]; 1188 if (tx->send) 1189 while ((skb = skb_dequeue(&tx->backlog))) { 1190 res = do_tx(skb); 1191 if (res == enq_ok) continue; 1192 DPRINTK("re-queuing TX PDU\n"); 1193 skb_queue_head(&tx->backlog,skb); 1194 requeued++; 1195 if (res == enq_jam) return; 1196 break; 1197 } 1198 } 1199 } 1200 1201 1202 static void dequeue_tx(struct atm_dev *dev) 1203 { 1204 struct eni_dev *eni_dev; 1205 struct atm_vcc *vcc; 1206 struct sk_buff *skb; 1207 struct eni_tx *tx; 1208 1209 NULLCHECK(dev); 1210 eni_dev = ENI_DEV(dev); 1211 NULLCHECK(eni_dev); 1212 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1213 vcc = ATM_SKB(skb)->vcc; 1214 NULLCHECK(vcc); 1215 tx = ENI_VCC(vcc)->tx; 1216 NULLCHECK(ENI_VCC(vcc)->tx); 1217 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1218 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1219 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1220 eni_in(MID_TX_DESCRSTART(tx->index))) { 1221 skb_queue_head(&eni_dev->tx_queue,skb); 1222 break; 1223 } 1224 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1225 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 1226 DMA_TO_DEVICE); 1227 if (vcc->pop) vcc->pop(vcc,skb); 1228 else dev_kfree_skb_irq(skb); 1229 atomic_inc(&vcc->stats->tx); 1230 wake_up(&eni_dev->tx_wait); 1231 dma_complete++; 1232 } 1233 } 1234 1235 1236 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1237 { 1238 int i; 1239 1240 for (i = !ubr; i < NR_CHAN; i++) 1241 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1242 return NULL; 1243 } 1244 1245 1246 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1247 int *res,int unlimited) 1248 { 1249 static const int pre_div[] = { 4,16,128,2048 }; 1250 /* 2^(((x+2)^2-(x+2))/2+1) */ 1251 1252 if (unlimited) *pre = *res = 0; 1253 else { 1254 if (*pcr > 0) { 1255 int div; 1256 1257 for (*pre = 0; *pre < 3; (*pre)++) 1258 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1259 div = pre_div[*pre]**pcr; 1260 DPRINTK("min div %d\n",div); 1261 *res = TS_CLOCK/div-1; 1262 } 1263 else { 1264 int div; 1265 1266 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1267 for (*pre = 3; *pre >= 0; (*pre)--) 1268 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1269 if (*pre < 3) (*pre)++; /* else fail later */ 1270 div = pre_div[*pre]*-*pcr; 1271 DPRINTK("max div %d\n",div); 1272 *res = DIV_ROUND_UP(TS_CLOCK, div)-1; 1273 } 1274 if (*res < 0) *res = 0; 1275 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1276 } 1277 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1278 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1279 return 0; 1280 } 1281 1282 1283 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1284 int set_rsv,int set_shp) 1285 { 1286 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1287 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1288 struct eni_tx *tx; 1289 unsigned long size; 1290 void __iomem *mem; 1291 int rate,ubr,unlimited,new_tx; 1292 int pre,res,order; 1293 int error; 1294 1295 rate = atm_pcr_goal(txtp); 1296 ubr = txtp->traffic_class == ATM_UBR; 1297 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1298 rate >= ATM_OC3_PCR); 1299 if (!unlimited) { 1300 size = txtp->max_sdu*eni_dev->tx_mult/100; 1301 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1302 MID_MAX_BUF_SIZE) 1303 size = MID_MAX_BUF_SIZE; 1304 } 1305 else { 1306 if (eni_dev->ubr) { 1307 eni_vcc->tx = eni_dev->ubr; 1308 txtp->pcr = ATM_OC3_PCR; 1309 return 0; 1310 } 1311 size = UBR_BUFFER; 1312 } 1313 new_tx = !eni_vcc->tx; 1314 mem = NULL; /* for gcc */ 1315 if (!new_tx) tx = eni_vcc->tx; 1316 else { 1317 mem = eni_alloc_mem(eni_dev,&size); 1318 if (!mem) return -ENOBUFS; 1319 tx = alloc_tx(eni_dev,unlimited); 1320 if (!tx) { 1321 eni_free_mem(eni_dev,mem,size); 1322 return -EBUSY; 1323 } 1324 DPRINTK("got chan %d\n",tx->index); 1325 tx->reserved = tx->shaping = 0; 1326 tx->send = mem; 1327 tx->words = size >> 2; 1328 skb_queue_head_init(&tx->backlog); 1329 for (order = 0; size > (1 << (order+10)); order++); 1330 eni_out((order << MID_SIZE_SHIFT) | 1331 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1332 MID_TX_PLACE(tx->index)); 1333 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1334 MID_DESCR_START; 1335 } 1336 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1337 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1338 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1339 txtp->max_pcr < rate) error = -EINVAL; 1340 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1341 error = -EINVAL; 1342 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1343 error = -EINVAL; 1344 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1345 error = -EINVAL; 1346 if (error) { 1347 if (new_tx) { 1348 tx->send = NULL; 1349 eni_free_mem(eni_dev,mem,size); 1350 } 1351 return error; 1352 } 1353 txtp->pcr = rate; 1354 if (set_rsv && !ubr) { 1355 eni_dev->tx_bw += tx->reserved; 1356 tx->reserved = rate; 1357 eni_dev->tx_bw -= rate; 1358 } 1359 if (set_shp || (unlimited && new_tx)) { 1360 if (unlimited && new_tx) eni_dev->ubr = tx; 1361 tx->prescaler = pre; 1362 tx->resolution = res; 1363 tx->shaping = rate; 1364 } 1365 if (set_shp) eni_vcc->tx = tx; 1366 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1367 return 0; 1368 } 1369 1370 1371 static int open_tx_first(struct atm_vcc *vcc) 1372 { 1373 ENI_VCC(vcc)->tx = NULL; 1374 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1375 ENI_VCC(vcc)->txing = 0; 1376 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1377 } 1378 1379 1380 static int open_tx_second(struct atm_vcc *vcc) 1381 { 1382 return 0; /* nothing to do */ 1383 } 1384 1385 1386 static void close_tx(struct atm_vcc *vcc) 1387 { 1388 DECLARE_WAITQUEUE(wait,current); 1389 struct eni_dev *eni_dev; 1390 struct eni_vcc *eni_vcc; 1391 1392 eni_vcc = ENI_VCC(vcc); 1393 if (!eni_vcc->tx) return; 1394 eni_dev = ENI_DEV(vcc->dev); 1395 /* wait for TX queue to drain */ 1396 DPRINTK("eni_close: waiting for TX ...\n"); 1397 add_wait_queue(&eni_dev->tx_wait,&wait); 1398 set_current_state(TASK_UNINTERRUPTIBLE); 1399 for (;;) { 1400 int txing; 1401 1402 tasklet_disable(&eni_dev->task); 1403 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1404 tasklet_enable(&eni_dev->task); 1405 if (!txing) break; 1406 DPRINTK("%d TX left\n",eni_vcc->txing); 1407 schedule(); 1408 set_current_state(TASK_UNINTERRUPTIBLE); 1409 } 1410 set_current_state(TASK_RUNNING); 1411 remove_wait_queue(&eni_dev->tx_wait,&wait); 1412 if (eni_vcc->tx != eni_dev->ubr) { 1413 /* 1414 * Looping a few times in here is probably far cheaper than 1415 * keeping track of TX completions all the time, so let's poll 1416 * a bit ... 1417 */ 1418 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1419 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1420 schedule(); 1421 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1422 eni_vcc->tx->send = NULL; 1423 eni_dev->tx_bw += eni_vcc->tx->reserved; 1424 } 1425 eni_vcc->tx = NULL; 1426 } 1427 1428 1429 static int start_tx(struct atm_dev *dev) 1430 { 1431 struct eni_dev *eni_dev; 1432 int i; 1433 1434 eni_dev = ENI_DEV(dev); 1435 eni_dev->lost = 0; 1436 eni_dev->tx_bw = ATM_OC3_PCR; 1437 eni_dev->tx_mult = DEFAULT_TX_MULT; 1438 init_waitqueue_head(&eni_dev->tx_wait); 1439 eni_dev->ubr = NULL; 1440 skb_queue_head_init(&eni_dev->tx_queue); 1441 eni_out(0,MID_DMA_WR_TX); 1442 for (i = 0; i < NR_CHAN; i++) { 1443 eni_dev->tx[i].send = NULL; 1444 eni_dev->tx[i].index = i; 1445 } 1446 return 0; 1447 } 1448 1449 1450 /*--------------------------------- common ----------------------------------*/ 1451 1452 1453 #if 0 /* may become useful again when tuning things */ 1454 1455 static void foo(void) 1456 { 1457 printk(KERN_INFO 1458 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1459 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1460 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1461 rx_enqueued,rx_dequeued,putting,pushed); 1462 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1463 } 1464 1465 #endif 1466 1467 1468 static void bug_int(struct atm_dev *dev,unsigned long reason) 1469 { 1470 DPRINTK(">bug_int\n"); 1471 if (reason & MID_DMA_ERR_ACK) 1472 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1473 "error\n",dev->number); 1474 if (reason & MID_TX_IDENT_MISM) 1475 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1476 "mismatch\n",dev->number); 1477 if (reason & MID_TX_DMA_OVFL) 1478 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1479 "overflow\n",dev->number); 1480 EVENT("---dump ends here---\n",0,0); 1481 printk(KERN_NOTICE "---recent events---\n"); 1482 event_dump(); 1483 } 1484 1485 1486 static irqreturn_t eni_int(int irq,void *dev_id) 1487 { 1488 struct atm_dev *dev; 1489 struct eni_dev *eni_dev; 1490 u32 reason; 1491 1492 DPRINTK(">eni_int\n"); 1493 dev = dev_id; 1494 eni_dev = ENI_DEV(dev); 1495 reason = eni_in(MID_ISA); 1496 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1497 /* 1498 * Must handle these two right now, because reading ISA doesn't clear 1499 * them, so they re-occur and we never make it to the tasklet. Since 1500 * they're rare, we don't mind the occasional invocation of eni_tasklet 1501 * with eni_dev->events == 0. 1502 */ 1503 if (reason & MID_STAT_OVFL) { 1504 EVENT("stat overflow\n",0,0); 1505 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1506 } 1507 if (reason & MID_SUNI_INT) { 1508 EVENT("SUNI int\n",0,0); 1509 dev->phy->interrupt(dev); 1510 #if 0 1511 foo(); 1512 #endif 1513 } 1514 spin_lock(&eni_dev->lock); 1515 eni_dev->events |= reason; 1516 spin_unlock(&eni_dev->lock); 1517 tasklet_schedule(&eni_dev->task); 1518 return IRQ_HANDLED; 1519 } 1520 1521 1522 static void eni_tasklet(unsigned long data) 1523 { 1524 struct atm_dev *dev = (struct atm_dev *) data; 1525 struct eni_dev *eni_dev = ENI_DEV(dev); 1526 unsigned long flags; 1527 u32 events; 1528 1529 DPRINTK("eni_tasklet (dev %p)\n",dev); 1530 spin_lock_irqsave(&eni_dev->lock,flags); 1531 events = xchg(&eni_dev->events,0); 1532 spin_unlock_irqrestore(&eni_dev->lock,flags); 1533 if (events & MID_RX_DMA_COMPLETE) { 1534 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1535 dequeue_rx(dev); 1536 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1537 poll_rx(dev); 1538 EVENT("poll_rx done\n",0,0); 1539 /* poll_tx ? */ 1540 } 1541 if (events & MID_SERVICE) { 1542 EVENT("INT: service, starting get_service\n",0,0); 1543 get_service(dev); 1544 EVENT("get_service done, starting poll_rx\n",0,0); 1545 poll_rx(dev); 1546 EVENT("poll_rx done\n",0,0); 1547 } 1548 if (events & MID_TX_DMA_COMPLETE) { 1549 EVENT("INT: TX DMA COMPLETE\n",0,0); 1550 dequeue_tx(dev); 1551 } 1552 if (events & MID_TX_COMPLETE) { 1553 EVENT("INT: TX COMPLETE\n",0,0); 1554 tx_complete++; 1555 wake_up(&eni_dev->tx_wait); 1556 /* poll_rx ? */ 1557 } 1558 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1559 EVENT("bug interrupt\n",0,0); 1560 bug_int(dev,events); 1561 } 1562 poll_tx(dev); 1563 } 1564 1565 1566 /*--------------------------------- entries ---------------------------------*/ 1567 1568 1569 static char * const media_name[] = { 1570 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1571 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1572 "TAXI","09?", "10?", "11?", /* 8-11 */ 1573 "12?", "13?", "14?", "15?", /* 12-15 */ 1574 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1575 "UTP", "21?", "22?", "23?", /* 20-23 */ 1576 "24?", "25?", "26?", "27?", /* 24-27 */ 1577 "28?", "29?", "30?", "31?" /* 28-31 */ 1578 }; 1579 1580 1581 #define SET_SEPROM \ 1582 ({ if (!error && !pci_error) { \ 1583 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1584 udelay(10); /* 10 usecs */ \ 1585 } }) 1586 #define GET_SEPROM \ 1587 ({ if (!error && !pci_error) { \ 1588 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1589 udelay(10); /* 10 usecs */ \ 1590 } }) 1591 1592 1593 static int get_esi_asic(struct atm_dev *dev) 1594 { 1595 struct eni_dev *eni_dev; 1596 unsigned char tonga; 1597 int error,failed,pci_error; 1598 int address,i,j; 1599 1600 eni_dev = ENI_DEV(dev); 1601 error = pci_error = 0; 1602 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1603 SET_SEPROM; 1604 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1605 /* start operation */ 1606 tonga |= SEPROM_DATA; 1607 SET_SEPROM; 1608 tonga |= SEPROM_CLK; 1609 SET_SEPROM; 1610 tonga &= ~SEPROM_DATA; 1611 SET_SEPROM; 1612 tonga &= ~SEPROM_CLK; 1613 SET_SEPROM; 1614 /* send address */ 1615 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1616 for (j = 7; j >= 0; j--) { 1617 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1618 tonga & ~SEPROM_DATA; 1619 SET_SEPROM; 1620 tonga |= SEPROM_CLK; 1621 SET_SEPROM; 1622 tonga &= ~SEPROM_CLK; 1623 SET_SEPROM; 1624 } 1625 /* get ack */ 1626 tonga |= SEPROM_DATA; 1627 SET_SEPROM; 1628 tonga |= SEPROM_CLK; 1629 SET_SEPROM; 1630 GET_SEPROM; 1631 failed = tonga & SEPROM_DATA; 1632 tonga &= ~SEPROM_CLK; 1633 SET_SEPROM; 1634 tonga |= SEPROM_DATA; 1635 SET_SEPROM; 1636 if (failed) error = -EIO; 1637 else { 1638 dev->esi[i] = 0; 1639 for (j = 7; j >= 0; j--) { 1640 dev->esi[i] <<= 1; 1641 tonga |= SEPROM_DATA; 1642 SET_SEPROM; 1643 tonga |= SEPROM_CLK; 1644 SET_SEPROM; 1645 GET_SEPROM; 1646 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1647 tonga &= ~SEPROM_CLK; 1648 SET_SEPROM; 1649 tonga |= SEPROM_DATA; 1650 SET_SEPROM; 1651 } 1652 /* get ack */ 1653 tonga |= SEPROM_DATA; 1654 SET_SEPROM; 1655 tonga |= SEPROM_CLK; 1656 SET_SEPROM; 1657 GET_SEPROM; 1658 if (!(tonga & SEPROM_DATA)) error = -EIO; 1659 tonga &= ~SEPROM_CLK; 1660 SET_SEPROM; 1661 tonga |= SEPROM_DATA; 1662 SET_SEPROM; 1663 } 1664 /* stop operation */ 1665 tonga &= ~SEPROM_DATA; 1666 SET_SEPROM; 1667 tonga |= SEPROM_CLK; 1668 SET_SEPROM; 1669 tonga |= SEPROM_DATA; 1670 SET_SEPROM; 1671 } 1672 if (pci_error) { 1673 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1674 "(0x%02x)\n",dev->number,pci_error); 1675 error = -EIO; 1676 } 1677 return error; 1678 } 1679 1680 1681 #undef SET_SEPROM 1682 #undef GET_SEPROM 1683 1684 1685 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1686 { 1687 void __iomem *mac_base; 1688 int i; 1689 1690 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1691 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1692 return 0; 1693 } 1694 1695 1696 static int eni_do_init(struct atm_dev *dev) 1697 { 1698 struct midway_eprom __iomem *eprom; 1699 struct eni_dev *eni_dev; 1700 struct pci_dev *pci_dev; 1701 unsigned long real_base; 1702 void __iomem *base; 1703 int error,i,last; 1704 1705 DPRINTK(">eni_init\n"); 1706 dev->ci_range.vpi_bits = 0; 1707 dev->ci_range.vci_bits = NR_VCI_LD; 1708 dev->link_rate = ATM_OC3_PCR; 1709 eni_dev = ENI_DEV(dev); 1710 pci_dev = eni_dev->pci_dev; 1711 real_base = pci_resource_start(pci_dev, 0); 1712 eni_dev->irq = pci_dev->irq; 1713 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1714 PCI_COMMAND_MEMORY | 1715 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1716 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1717 "(0x%02x)\n",dev->number,error); 1718 return -EIO; 1719 } 1720 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1721 dev->number,pci_dev->revision,real_base,eni_dev->irq); 1722 if (!(base = ioremap(real_base,MAP_MAX_SIZE))) { 1723 printk("\n"); 1724 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1725 "mapping\n",dev->number); 1726 return -ENOMEM; 1727 } 1728 eni_dev->ioaddr = base; 1729 eni_dev->base_diff = real_base - (unsigned long) base; 1730 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1731 if (!eni_dev->asic) { 1732 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1733 if (readl(&eprom->magic) != ENI155_MAGIC) { 1734 printk("\n"); 1735 printk(KERN_ERR DEV_LABEL 1736 "(itf %d): bad magic - expected 0x%x, got 0x%x\n", 1737 dev->number, ENI155_MAGIC, 1738 (unsigned)readl(&eprom->magic)); 1739 error = -EINVAL; 1740 goto unmap; 1741 } 1742 } 1743 eni_dev->phy = base+PHY_BASE; 1744 eni_dev->reg = base+REG_BASE; 1745 eni_dev->ram = base+RAM_BASE; 1746 last = MAP_MAX_SIZE-RAM_BASE; 1747 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1748 writel(0x55555555,eni_dev->ram+i); 1749 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1750 else { 1751 writel(0xAAAAAAAA,eni_dev->ram+i); 1752 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1753 else writel(i,eni_dev->ram+i); 1754 } 1755 } 1756 for (i = 0; i < last; i += RAM_INCREMENT) 1757 if (readl(eni_dev->ram+i) != i) break; 1758 eni_dev->mem = i; 1759 memset_io(eni_dev->ram,0,eni_dev->mem); 1760 /* TODO: should shrink allocation now */ 1761 printk("mem=%dkB (",eni_dev->mem >> 10); 1762 /* TODO: check for non-SUNI, check for TAXI ? */ 1763 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1764 printk(")\n"); 1765 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1766 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1767 error = -EINVAL; 1768 goto unmap; 1769 } 1770 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1771 if (error) 1772 goto unmap; 1773 for (i = 0; i < ESI_LEN; i++) 1774 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1775 printk(")\n"); 1776 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1777 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1778 media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]); 1779 1780 error = suni_init(dev); 1781 if (error) 1782 goto unmap; 1783 out: 1784 return error; 1785 unmap: 1786 iounmap(base); 1787 goto out; 1788 } 1789 1790 static void eni_do_release(struct atm_dev *dev) 1791 { 1792 struct eni_dev *ed = ENI_DEV(dev); 1793 1794 dev->phy->stop(dev); 1795 dev->phy = NULL; 1796 iounmap(ed->ioaddr); 1797 } 1798 1799 static int eni_start(struct atm_dev *dev) 1800 { 1801 struct eni_dev *eni_dev; 1802 1803 void __iomem *buf; 1804 unsigned long buffer_mem; 1805 int error; 1806 1807 DPRINTK(">eni_start\n"); 1808 eni_dev = ENI_DEV(dev); 1809 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { 1810 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1811 dev->number,eni_dev->irq); 1812 error = -EAGAIN; 1813 goto out; 1814 } 1815 pci_set_master(eni_dev->pci_dev); 1816 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1817 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1818 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1819 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1820 "master (0x%02x)\n",dev->number,error); 1821 goto free_irq; 1822 } 1823 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1824 END_SWAP_DMA))) { 1825 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1826 "(0x%02x)\n",dev->number,error); 1827 goto free_irq; 1828 } 1829 /* determine addresses of internal tables */ 1830 eni_dev->vci = eni_dev->ram; 1831 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1832 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1833 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1834 buf = eni_dev->service+NR_SERVICE*4; 1835 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1836 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1837 eni_dev->service,buf); 1838 spin_lock_init(&eni_dev->lock); 1839 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1840 eni_dev->events = 0; 1841 /* initialize memory management */ 1842 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1843 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1844 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1, 1845 sizeof(*eni_dev->free_list), 1846 GFP_KERNEL); 1847 if (!eni_dev->free_list) { 1848 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1849 dev->number); 1850 error = -ENOMEM; 1851 goto free_irq; 1852 } 1853 eni_dev->free_len = 0; 1854 eni_put_free(eni_dev,buf,buffer_mem); 1855 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1856 /* 1857 * byte_addr free (k) 1858 * 0x00000000 512 VCI table 1859 * 0x00004000 496 RX DMA 1860 * 0x00005000 492 TX DMA 1861 * 0x00006000 488 service list 1862 * 0x00007000 484 buffers 1863 * 0x00080000 0 end (512kB) 1864 */ 1865 eni_out(0xffffffff,MID_IE); 1866 error = start_tx(dev); 1867 if (error) goto free_list; 1868 error = start_rx(dev); 1869 if (error) goto free_list; 1870 error = dev->phy->start(dev); 1871 if (error) goto free_list; 1872 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1873 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1874 MID_MC_S); 1875 /* Tonga uses SBus INTReq1 */ 1876 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1877 return 0; 1878 1879 free_list: 1880 kfree(eni_dev->free_list); 1881 1882 free_irq: 1883 free_irq(eni_dev->irq, dev); 1884 1885 out: 1886 return error; 1887 } 1888 1889 1890 static void eni_close(struct atm_vcc *vcc) 1891 { 1892 DPRINTK(">eni_close\n"); 1893 if (!ENI_VCC(vcc)) return; 1894 clear_bit(ATM_VF_READY,&vcc->flags); 1895 close_rx(vcc); 1896 close_tx(vcc); 1897 DPRINTK("eni_close: done waiting\n"); 1898 /* deallocate memory */ 1899 kfree(ENI_VCC(vcc)); 1900 vcc->dev_data = NULL; 1901 clear_bit(ATM_VF_ADDR,&vcc->flags); 1902 /*foo();*/ 1903 } 1904 1905 1906 static int eni_open(struct atm_vcc *vcc) 1907 { 1908 struct eni_vcc *eni_vcc; 1909 int error; 1910 short vpi = vcc->vpi; 1911 int vci = vcc->vci; 1912 1913 DPRINTK(">eni_open\n"); 1914 EVENT("eni_open\n",0,0); 1915 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1916 vcc->dev_data = NULL; 1917 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1918 set_bit(ATM_VF_ADDR,&vcc->flags); 1919 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1920 return -EINVAL; 1921 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1922 vcc->vci); 1923 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1924 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1925 if (!eni_vcc) return -ENOMEM; 1926 vcc->dev_data = eni_vcc; 1927 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1928 if ((error = open_rx_first(vcc))) { 1929 eni_close(vcc); 1930 return error; 1931 } 1932 if ((error = open_tx_first(vcc))) { 1933 eni_close(vcc); 1934 return error; 1935 } 1936 } 1937 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1938 if ((error = open_rx_second(vcc))) { 1939 eni_close(vcc); 1940 return error; 1941 } 1942 if ((error = open_tx_second(vcc))) { 1943 eni_close(vcc); 1944 return error; 1945 } 1946 set_bit(ATM_VF_READY,&vcc->flags); 1947 /* should power down SUNI while !ref_count @@@ */ 1948 return 0; 1949 } 1950 1951 1952 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1953 { 1954 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1955 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1956 struct sk_buff *skb; 1957 int error,rate,rsv,shp; 1958 1959 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1960 if (tx == eni_dev->ubr) return -EBADFD; 1961 rate = atm_pcr_goal(&qos->txtp); 1962 if (rate < 0) rate = -rate; 1963 rsv = shp = 0; 1964 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1965 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1966 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1967 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1968 if (!rsv && !shp) return 0; 1969 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1970 if (error) return error; 1971 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1972 /* 1973 * Walk through the send buffer and patch the rate information in all 1974 * segmentation buffer descriptors of this VCC. 1975 */ 1976 tasklet_disable(&eni_dev->task); 1977 skb_queue_walk(&eni_dev->tx_queue, skb) { 1978 void __iomem *dsc; 1979 1980 if (ATM_SKB(skb)->vcc != vcc) continue; 1981 dsc = tx->send+ENI_PRV_POS(skb)*4; 1982 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1983 (tx->prescaler << MID_SEG_PR_SHIFT) | 1984 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1985 } 1986 tasklet_enable(&eni_dev->task); 1987 return 0; 1988 } 1989 1990 1991 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1992 { 1993 struct eni_dev *eni_dev = ENI_DEV(dev); 1994 1995 if (cmd == ENI_MEMDUMP) { 1996 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1997 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 1998 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 1999 dump(dev); 2000 return 0; 2001 } 2002 if (cmd == ENI_SETMULT) { 2003 struct eni_multipliers mult; 2004 2005 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2006 if (copy_from_user(&mult, arg, 2007 sizeof(struct eni_multipliers))) 2008 return -EFAULT; 2009 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2010 mult.tx > 65536 || mult.rx > 65536) 2011 return -EINVAL; 2012 if (mult.tx) eni_dev->tx_mult = mult.tx; 2013 if (mult.rx) eni_dev->rx_mult = mult.rx; 2014 return 0; 2015 } 2016 if (cmd == ATM_SETCIRANGE) { 2017 struct atm_cirange ci; 2018 2019 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2020 return -EFAULT; 2021 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2022 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2023 return 0; 2024 return -EINVAL; 2025 } 2026 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2027 return dev->phy->ioctl(dev,cmd,arg); 2028 } 2029 2030 2031 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2032 void __user *optval,int optlen) 2033 { 2034 return -EINVAL; 2035 } 2036 2037 2038 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2039 void __user *optval,unsigned int optlen) 2040 { 2041 return -EINVAL; 2042 } 2043 2044 2045 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2046 { 2047 enum enq_res res; 2048 2049 DPRINTK(">eni_send\n"); 2050 if (!ENI_VCC(vcc)->tx) { 2051 if (vcc->pop) vcc->pop(vcc,skb); 2052 else dev_kfree_skb(skb); 2053 return -EINVAL; 2054 } 2055 if (!skb) { 2056 printk(KERN_CRIT "!skb in eni_send ?\n"); 2057 if (vcc->pop) vcc->pop(vcc,skb); 2058 return -EINVAL; 2059 } 2060 if (vcc->qos.aal == ATM_AAL0) { 2061 if (skb->len != ATM_CELL_SIZE-1) { 2062 if (vcc->pop) vcc->pop(vcc,skb); 2063 else dev_kfree_skb(skb); 2064 return -EINVAL; 2065 } 2066 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2067 } 2068 submitted++; 2069 ATM_SKB(skb)->vcc = vcc; 2070 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2071 res = do_tx(skb); 2072 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2073 if (res == enq_ok) return 0; 2074 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2075 backlogged++; 2076 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2077 return 0; 2078 } 2079 2080 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2081 unsigned long addr) 2082 { 2083 writel(value,ENI_DEV(dev)->phy+addr*4); 2084 } 2085 2086 2087 2088 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2089 { 2090 return readl(ENI_DEV(dev)->phy+addr*4); 2091 } 2092 2093 2094 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2095 { 2096 struct sock *s; 2097 static const char *signal[] = { "LOST","unknown","okay" }; 2098 struct eni_dev *eni_dev = ENI_DEV(dev); 2099 struct atm_vcc *vcc; 2100 int left,i; 2101 2102 left = *pos; 2103 if (!left) 2104 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2105 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2106 eni_dev->mem >> 10,eni_dev->tx_bw); 2107 if (!--left) 2108 return sprintf(page,"%4sBursts: TX" 2109 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2110 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2111 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2112 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2113 " none" 2114 #endif 2115 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2116 " 16W" 2117 #endif 2118 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2119 " 8W" 2120 #endif 2121 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2122 " 4W" 2123 #endif 2124 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2125 " 2W" 2126 #endif 2127 ", RX" 2128 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2129 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2130 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2131 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2132 " none" 2133 #endif 2134 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2135 " 16W" 2136 #endif 2137 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2138 " 8W" 2139 #endif 2140 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2141 " 4W" 2142 #endif 2143 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2144 " 2W" 2145 #endif 2146 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2147 " (default)" 2148 #endif 2149 "\n",""); 2150 if (!--left) 2151 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2152 "",eni_dev->tx_mult,eni_dev->rx_mult); 2153 for (i = 0; i < NR_CHAN; i++) { 2154 struct eni_tx *tx = eni_dev->tx+i; 2155 2156 if (!tx->send) continue; 2157 if (!--left) { 2158 return sprintf(page, "tx[%d]: 0x%lx-0x%lx " 2159 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2160 (unsigned long) (tx->send - eni_dev->ram), 2161 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2162 tx->reserved,tx->shaping, 2163 tx == eni_dev->ubr ? " (UBR)" : ""); 2164 } 2165 if (--left) continue; 2166 return sprintf(page,"%10sbacklog %u packets\n","", 2167 skb_queue_len(&tx->backlog)); 2168 } 2169 read_lock(&vcc_sklist_lock); 2170 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2171 struct hlist_head *head = &vcc_hash[i]; 2172 2173 sk_for_each(s, head) { 2174 struct eni_vcc *eni_vcc; 2175 int length; 2176 2177 vcc = atm_sk(s); 2178 if (vcc->dev != dev) 2179 continue; 2180 eni_vcc = ENI_VCC(vcc); 2181 if (--left) continue; 2182 length = sprintf(page,"vcc %4d: ",vcc->vci); 2183 if (eni_vcc->rx) { 2184 length += sprintf(page+length, "0x%lx-0x%lx " 2185 "(%6ld bytes)", 2186 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2187 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2188 eni_vcc->words*4); 2189 if (eni_vcc->tx) length += sprintf(page+length,", "); 2190 } 2191 if (eni_vcc->tx) 2192 length += sprintf(page+length,"tx[%d], txing %d bytes", 2193 eni_vcc->tx->index,eni_vcc->txing); 2194 page[length] = '\n'; 2195 read_unlock(&vcc_sklist_lock); 2196 return length+1; 2197 } 2198 } 2199 read_unlock(&vcc_sklist_lock); 2200 for (i = 0; i < eni_dev->free_len; i++) { 2201 struct eni_free *fe = eni_dev->free_list+i; 2202 unsigned long offset; 2203 2204 if (--left) continue; 2205 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2206 return sprintf(page,"free %p-%p (%6d bytes)\n", 2207 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2208 1 << fe->order); 2209 } 2210 return 0; 2211 } 2212 2213 2214 static const struct atmdev_ops ops = { 2215 .open = eni_open, 2216 .close = eni_close, 2217 .ioctl = eni_ioctl, 2218 .getsockopt = eni_getsockopt, 2219 .setsockopt = eni_setsockopt, 2220 .send = eni_send, 2221 .phy_put = eni_phy_put, 2222 .phy_get = eni_phy_get, 2223 .change_qos = eni_change_qos, 2224 .proc_read = eni_proc_read 2225 }; 2226 2227 2228 static int eni_init_one(struct pci_dev *pci_dev, 2229 const struct pci_device_id *ent) 2230 { 2231 struct atm_dev *dev; 2232 struct eni_dev *eni_dev; 2233 struct eni_zero *zero; 2234 int rc; 2235 2236 rc = pci_enable_device(pci_dev); 2237 if (rc < 0) 2238 goto out; 2239 2240 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); 2241 if (rc < 0) 2242 goto out; 2243 2244 rc = -ENOMEM; 2245 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); 2246 if (!eni_dev) 2247 goto err_disable; 2248 2249 zero = &eni_dev->zero; 2250 zero->addr = dma_alloc_coherent(&pci_dev->dev, 2251 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL); 2252 if (!zero->addr) 2253 goto err_kfree; 2254 2255 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); 2256 if (!dev) 2257 goto err_free_consistent; 2258 2259 dev->dev_data = eni_dev; 2260 pci_set_drvdata(pci_dev, dev); 2261 eni_dev->pci_dev = pci_dev; 2262 eni_dev->asic = ent->driver_data; 2263 2264 rc = eni_do_init(dev); 2265 if (rc < 0) 2266 goto err_unregister; 2267 2268 rc = eni_start(dev); 2269 if (rc < 0) 2270 goto err_eni_release; 2271 2272 eni_dev->more = eni_boards; 2273 eni_boards = dev; 2274 out: 2275 return rc; 2276 2277 err_eni_release: 2278 eni_do_release(dev); 2279 err_unregister: 2280 atm_dev_deregister(dev); 2281 err_free_consistent: 2282 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2283 err_kfree: 2284 kfree(eni_dev); 2285 err_disable: 2286 pci_disable_device(pci_dev); 2287 goto out; 2288 } 2289 2290 2291 static const struct pci_device_id eni_pci_tbl[] = { 2292 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, 2293 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, 2294 { 0, } 2295 }; 2296 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2297 2298 2299 static void eni_remove_one(struct pci_dev *pdev) 2300 { 2301 struct atm_dev *dev = pci_get_drvdata(pdev); 2302 struct eni_dev *ed = ENI_DEV(dev); 2303 struct eni_zero *zero = &ed->zero; 2304 2305 eni_do_release(dev); 2306 atm_dev_deregister(dev); 2307 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2308 kfree(ed); 2309 pci_disable_device(pdev); 2310 } 2311 2312 2313 static struct pci_driver eni_driver = { 2314 .name = DEV_LABEL, 2315 .id_table = eni_pci_tbl, 2316 .probe = eni_init_one, 2317 .remove = eni_remove_one, 2318 }; 2319 2320 2321 static int __init eni_init(void) 2322 { 2323 struct sk_buff *skb; /* dummy for sizeof */ 2324 2325 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv)); 2326 return pci_register_driver(&eni_driver); 2327 } 2328 2329 2330 module_init(eni_init); 2331 /* @@@ since exit routine not defined, this module can not be unloaded */ 2332 2333 MODULE_LICENSE("GPL"); 2334