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 #if !defined(__i386__) && !defined(__x86_64__) 35 #ifndef ioremap_nocache 36 #define ioremap_nocache(X,Y) ioremap(X,Y) 37 #endif 38 #endif 39 40 /* 41 * TODO: 42 * 43 * Show stoppers 44 * none 45 * 46 * Minor 47 * - OAM support 48 * - fix bugs listed below 49 */ 50 51 /* 52 * KNOWN BUGS: 53 * 54 * - may run into JK-JK bug and deadlock 55 * - should allocate UBR channel first 56 * - buffer space allocation algorithm is stupid 57 * (RX: should be maxSDU+maxdelay*rate 58 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 59 * - doesn't support OAM cells 60 * - eni_put_free may hang if not putting memory fragments that _complete_ 61 * 2^n block (never happens in real life, though) 62 */ 63 64 65 #if 0 66 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 67 #else 68 #define DPRINTK(format,args...) 69 #endif 70 71 72 #ifndef CONFIG_ATM_ENI_TUNE_BURST 73 #define CONFIG_ATM_ENI_BURST_TX_8W 74 #define CONFIG_ATM_ENI_BURST_RX_4W 75 #endif 76 77 78 #ifndef CONFIG_ATM_ENI_DEBUG 79 80 81 #define NULLCHECK(x) 82 83 #define EVENT(s,a,b) 84 85 86 static void event_dump(void) 87 { 88 } 89 90 91 #else 92 93 94 /* 95 * NULL pointer checking 96 */ 97 98 #define NULLCHECK(x) \ 99 if ((unsigned long) (x) < 0x30) \ 100 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 101 102 /* 103 * Very extensive activity logging. Greatly improves bug detection speed but 104 * costs a few Mbps if enabled. 105 */ 106 107 #define EV 64 108 109 static const char *ev[EV]; 110 static unsigned long ev_a[EV],ev_b[EV]; 111 static int ec = 0; 112 113 114 static void EVENT(const char *s,unsigned long a,unsigned long b) 115 { 116 ev[ec] = s; 117 ev_a[ec] = a; 118 ev_b[ec] = b; 119 ec = (ec+1) % EV; 120 } 121 122 123 static void event_dump(void) 124 { 125 int n,i; 126 127 for (n = 0; n < EV; n++) { 128 i = (ec+n) % EV; 129 printk(KERN_NOTICE); 130 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 131 } 132 } 133 134 135 #endif /* CONFIG_ATM_ENI_DEBUG */ 136 137 138 /* 139 * NExx must not be equal at end 140 * EExx may be equal at end 141 * xxPJOK verify validity of pointer jumps 142 * xxPMOK operating on a circular buffer of "c" words 143 */ 144 145 #define NEPJOK(a0,a1,b) \ 146 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 147 #define EEPJOK(a0,a1,b) \ 148 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 149 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 150 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 151 152 153 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 154 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 155 putting = 0; 156 157 static struct atm_dev *eni_boards = NULL; 158 159 /* Read/write registers on card */ 160 #define eni_in(r) readl(eni_dev->reg+(r)*4) 161 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) 162 163 164 /*-------------------------------- utilities --------------------------------*/ 165 166 167 static void dump_mem(struct eni_dev *eni_dev) 168 { 169 int i; 170 171 for (i = 0; i < eni_dev->free_len; i++) 172 printk(KERN_DEBUG " %d: %p %d\n",i, 173 eni_dev->free_list[i].start, 174 1 << eni_dev->free_list[i].order); 175 } 176 177 178 static void dump(struct atm_dev *dev) 179 { 180 struct eni_dev *eni_dev; 181 182 int i; 183 184 eni_dev = ENI_DEV(dev); 185 printk(KERN_NOTICE "Free memory\n"); 186 dump_mem(eni_dev); 187 printk(KERN_NOTICE "TX buffers\n"); 188 for (i = 0; i < NR_CHAN; i++) 189 if (eni_dev->tx[i].send) 190 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, 191 eni_dev->tx[i].send,eni_dev->tx[i].words*4); 192 printk(KERN_NOTICE "RX buffers\n"); 193 for (i = 0; i < 1024; i++) 194 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) 195 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, 196 ENI_VCC(eni_dev->rx_map[i])->recv, 197 ENI_VCC(eni_dev->rx_map[i])->words*4); 198 printk(KERN_NOTICE "----\n"); 199 } 200 201 202 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, 203 unsigned long size) 204 { 205 struct eni_free *list; 206 int len,order; 207 208 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); 209 start += eni_dev->base_diff; 210 list = eni_dev->free_list; 211 len = eni_dev->free_len; 212 while (size) { 213 if (len >= eni_dev->free_list_size) { 214 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", 215 start,size); 216 break; 217 } 218 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); 219 if (MID_MIN_BUF_SIZE > (1 << order)) { 220 printk(KERN_CRIT "eni_put_free: order %d too small\n", 221 order); 222 break; 223 } 224 list[len].start = (void __iomem *) start; 225 list[len].order = order; 226 len++; 227 start += 1 << order; 228 size -= 1 << order; 229 } 230 eni_dev->free_len = len; 231 /*dump_mem(eni_dev);*/ 232 } 233 234 235 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) 236 { 237 struct eni_free *list; 238 void __iomem *start; 239 int len,i,order,best_order,index; 240 241 list = eni_dev->free_list; 242 len = eni_dev->free_len; 243 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; 244 if (*size > MID_MAX_BUF_SIZE) return NULL; 245 for (order = 0; (1 << order) < *size; order++) 246 ; 247 DPRINTK("trying: %ld->%d\n",*size,order); 248 best_order = 65; /* we don't have more than 2^64 of anything ... */ 249 index = 0; /* silence GCC */ 250 for (i = 0; i < len; i++) 251 if (list[i].order == order) { 252 best_order = order; 253 index = i; 254 break; 255 } 256 else if (best_order > list[i].order && list[i].order > order) { 257 best_order = list[i].order; 258 index = i; 259 } 260 if (best_order == 65) return NULL; 261 start = list[index].start-eni_dev->base_diff; 262 list[index] = list[--len]; 263 eni_dev->free_len = len; 264 *size = 1 << order; 265 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 266 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 267 memset_io(start,0,*size); /* never leak data */ 268 /*dump_mem(eni_dev);*/ 269 return start; 270 } 271 272 273 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 274 unsigned long size) 275 { 276 struct eni_free *list; 277 int len,i,order; 278 279 start += eni_dev->base_diff; 280 list = eni_dev->free_list; 281 len = eni_dev->free_len; 282 for (order = -1; size; order++) size >>= 1; 283 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 284 for (i = 0; i < len; i++) 285 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 286 list[i].order == order) { 287 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 288 list[i].start,start,1 << order,list[i].order,order); 289 list[i] = list[--len]; 290 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 291 order++; 292 i = -1; 293 continue; 294 } 295 if (len >= eni_dev->free_list_size) { 296 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 297 order); 298 return; 299 } 300 list[len].start = start; 301 list[len].order = order; 302 eni_dev->free_len = len+1; 303 /*dump_mem(eni_dev);*/ 304 } 305 306 307 /*----------------------------------- RX ------------------------------------*/ 308 309 310 #define ENI_VCC_NOS ((struct atm_vcc *) 1) 311 312 313 static void rx_ident_err(struct atm_vcc *vcc) 314 { 315 struct atm_dev *dev; 316 struct eni_dev *eni_dev; 317 struct eni_vcc *eni_vcc; 318 319 dev = vcc->dev; 320 eni_dev = ENI_DEV(dev); 321 /* immediately halt adapter */ 322 eni_out(eni_in(MID_MC_S) & 323 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 324 /* dump useful information */ 325 eni_vcc = ENI_VCC(vcc); 326 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 327 "mismatch\n",dev->number); 328 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 329 eni_vcc->rxing,eni_vcc->words); 330 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 331 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 332 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 333 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 334 eni_vcc->servicing); 335 EVENT("---dump ends here---\n",0,0); 336 printk(KERN_NOTICE "---recent events---\n"); 337 event_dump(); 338 ENI_DEV(dev)->fast = NULL; /* really stop it */ 339 ENI_DEV(dev)->slow = NULL; 340 skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 341 } 342 343 344 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 345 unsigned long skip,unsigned long size,unsigned long eff) 346 { 347 struct eni_dev *eni_dev; 348 struct eni_vcc *eni_vcc; 349 u32 dma_rd,dma_wr; 350 u32 dma[RX_DMA_BUF*2]; 351 dma_addr_t paddr; 352 unsigned long here; 353 int i,j; 354 355 eni_dev = ENI_DEV(vcc->dev); 356 eni_vcc = ENI_VCC(vcc); 357 paddr = 0; /* GCC, shut up */ 358 if (skb) { 359 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 360 DMA_FROM_DEVICE); 361 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) 362 goto dma_map_error; 363 ENI_PRV_PADDR(skb) = paddr; 364 if (paddr & 3) 365 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 366 "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 367 vcc->vci,(unsigned long) paddr); 368 ENI_PRV_SIZE(skb) = size+skip; 369 /* PDU plus descriptor */ 370 ATM_SKB(skb)->vcc = vcc; 371 } 372 j = 0; 373 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 374 here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 375 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 376 << MID_DMA_VCI_SHIFT) | MID_DT_JK; 377 dma[j++] = 0; 378 } 379 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 380 if (!eff) size += skip; 381 else { 382 unsigned long words; 383 384 if (!size) { 385 DPRINTK("strange things happen ...\n"); 386 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 387 size,eff); 388 } 389 words = eff; 390 if (paddr & 15) { 391 unsigned long init; 392 393 init = 4-((paddr & 15) >> 2); 394 if (init > words) init = words; 395 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 396 (vcc->vci << MID_DMA_VCI_SHIFT); 397 dma[j++] = paddr; 398 paddr += init << 2; 399 words -= init; 400 } 401 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 402 if (words & ~15) { 403 dma[j++] = MID_DT_16W | ((words >> 4) << 404 MID_DMA_COUNT_SHIFT) | (vcc->vci << 405 MID_DMA_VCI_SHIFT); 406 dma[j++] = paddr; 407 paddr += (words & ~15) << 2; 408 words &= 15; 409 } 410 #endif 411 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 412 if (words & ~7) { 413 dma[j++] = MID_DT_8W | ((words >> 3) << 414 MID_DMA_COUNT_SHIFT) | (vcc->vci << 415 MID_DMA_VCI_SHIFT); 416 dma[j++] = paddr; 417 paddr += (words & ~7) << 2; 418 words &= 7; 419 } 420 #endif 421 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 422 if (words & ~3) { 423 dma[j++] = MID_DT_4W | ((words >> 2) << 424 MID_DMA_COUNT_SHIFT) | (vcc->vci << 425 MID_DMA_VCI_SHIFT); 426 dma[j++] = paddr; 427 paddr += (words & ~3) << 2; 428 words &= 3; 429 } 430 #endif 431 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 432 if (words & ~1) { 433 dma[j++] = MID_DT_2W | ((words >> 1) << 434 MID_DMA_COUNT_SHIFT) | (vcc->vci << 435 MID_DMA_VCI_SHIFT); 436 dma[j++] = paddr; 437 paddr += (words & ~1) << 2; 438 words &= 1; 439 } 440 #endif 441 if (words) { 442 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 443 | (vcc->vci << MID_DMA_VCI_SHIFT); 444 dma[j++] = paddr; 445 } 446 } 447 if (size != eff) { 448 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 449 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 450 dma[j++] = 0; 451 } 452 if (!j || j > 2*RX_DMA_BUF) { 453 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 454 goto trouble; 455 } 456 dma[j-2] |= MID_DMA_END; 457 j = j >> 1; 458 dma_wr = eni_in(MID_DMA_WR_RX); 459 dma_rd = eni_in(MID_DMA_RD_RX); 460 /* 461 * Can I move the dma_wr pointer by 2j+1 positions without overwriting 462 * data that hasn't been read (position of dma_rd) yet ? 463 */ 464 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 465 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 466 vcc->dev->number); 467 goto trouble; 468 } 469 for (i = 0; i < j; i++) { 470 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 471 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 472 dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 473 } 474 if (skb) { 475 ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 476 skb_queue_tail(&eni_dev->rx_queue,skb); 477 eni_vcc->last = skb; 478 rx_enqueued++; 479 } 480 eni_vcc->descr = here; 481 eni_out(dma_wr,MID_DMA_WR_RX); 482 return 0; 483 484 trouble: 485 if (paddr) 486 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, 487 DMA_FROM_DEVICE); 488 dma_map_error: 489 if (skb) dev_kfree_skb_irq(skb); 490 return -1; 491 } 492 493 494 static void discard(struct atm_vcc *vcc,unsigned long size) 495 { 496 struct eni_vcc *eni_vcc; 497 498 eni_vcc = ENI_VCC(vcc); 499 EVENT("discard (size=%ld)\n",size,0); 500 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); 501 /* could do a full fallback, but that might be more expensive */ 502 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; 503 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); 504 } 505 506 507 /* 508 * TODO: should check whether direct copies (without DMA setup, dequeuing on 509 * interrupt, etc.) aren't much faster for AAL0 510 */ 511 512 static int rx_aal0(struct atm_vcc *vcc) 513 { 514 struct eni_vcc *eni_vcc; 515 unsigned long descr; 516 unsigned long length; 517 struct sk_buff *skb; 518 519 DPRINTK(">rx_aal0\n"); 520 eni_vcc = ENI_VCC(vcc); 521 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 522 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 523 rx_ident_err(vcc); 524 return 1; 525 } 526 if (descr & MID_RED_T) { 527 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 528 vcc->dev->number); 529 length = 0; 530 atomic_inc(&vcc->stats->rx_err); 531 } 532 else { 533 length = ATM_CELL_SIZE-1; /* no HEC */ 534 } 535 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; 536 if (!skb) { 537 discard(vcc,length >> 2); 538 return 0; 539 } 540 skb_put(skb,length); 541 skb->tstamp = eni_vcc->timestamp; 542 DPRINTK("got len %ld\n",length); 543 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; 544 eni_vcc->rxing++; 545 return 0; 546 } 547 548 549 static int rx_aal5(struct atm_vcc *vcc) 550 { 551 struct eni_vcc *eni_vcc; 552 unsigned long descr; 553 unsigned long size,eff,length; 554 struct sk_buff *skb; 555 556 EVENT("rx_aal5\n",0,0); 557 DPRINTK(">rx_aal5\n"); 558 eni_vcc = ENI_VCC(vcc); 559 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 560 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 561 rx_ident_err(vcc); 562 return 1; 563 } 564 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { 565 if (descr & MID_RED_T) { 566 EVENT("empty cell (descr=0x%lx)\n",descr,0); 567 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 568 vcc->dev->number); 569 size = 0; 570 } 571 else { 572 static unsigned long silence = 0; 573 574 if (time_after(jiffies, silence) || silence == 0) { 575 printk(KERN_WARNING DEV_LABEL "(itf %d): " 576 "discarding PDU(s) with CRC error\n", 577 vcc->dev->number); 578 silence = (jiffies+2*HZ)|1; 579 } 580 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 581 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, 582 size); 583 } 584 eff = length = 0; 585 atomic_inc(&vcc->stats->rx_err); 586 } 587 else { 588 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 589 DPRINTK("size=%ld\n",size); 590 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & 591 (eni_vcc->words-1)))*4) & 0xffff; 592 /* -trailer(2)+header(1) */ 593 if (length && length <= (size << 2)-8 && length <= 594 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; 595 else { /* ^ trailer length (8) */ 596 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, 597 length); 598 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " 599 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", 600 vcc->dev->number,vcc->vci,length,size << 2,descr); 601 length = eff = 0; 602 atomic_inc(&vcc->stats->rx_err); 603 } 604 } 605 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; 606 if (!skb) { 607 discard(vcc,size); 608 return 0; 609 } 610 skb_put(skb,length); 611 DPRINTK("got len %ld\n",length); 612 if (do_rx_dma(vcc,skb,1,size,eff)) return 1; 613 eni_vcc->rxing++; 614 return 0; 615 } 616 617 618 static inline int rx_vcc(struct atm_vcc *vcc) 619 { 620 void __iomem *vci_dsc; 621 unsigned long tmp; 622 struct eni_vcc *eni_vcc; 623 624 eni_vcc = ENI_VCC(vcc); 625 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; 626 EVENT("rx_vcc(1)\n",0,0); 627 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> 628 MID_VCI_DESCR_SHIFT)) { 629 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", 630 eni_vcc->descr,tmp); 631 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 632 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 633 MID_VCI_DESCR_SHIFT)); 634 if (ENI_VCC(vcc)->rx(vcc)) return 1; 635 } 636 /* clear IN_SERVICE flag */ 637 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); 638 /* 639 * If new data has arrived between evaluating the while condition and 640 * clearing IN_SERVICE, we wouldn't be notified until additional data 641 * follows. So we have to loop again to be sure. 642 */ 643 EVENT("rx_vcc(3)\n",0,0); 644 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) 645 >> MID_VCI_DESCR_SHIFT)) { 646 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", 647 eni_vcc->descr,tmp); 648 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 649 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 650 MID_VCI_DESCR_SHIFT)); 651 if (ENI_VCC(vcc)->rx(vcc)) return 1; 652 } 653 return 0; 654 } 655 656 657 static void poll_rx(struct atm_dev *dev) 658 { 659 struct eni_dev *eni_dev; 660 struct atm_vcc *curr; 661 662 eni_dev = ENI_DEV(dev); 663 while ((curr = eni_dev->fast)) { 664 EVENT("poll_rx.fast\n",0,0); 665 if (rx_vcc(curr)) return; 666 eni_dev->fast = ENI_VCC(curr)->next; 667 ENI_VCC(curr)->next = ENI_VCC_NOS; 668 barrier(); 669 ENI_VCC(curr)->servicing--; 670 } 671 while ((curr = eni_dev->slow)) { 672 EVENT("poll_rx.slow\n",0,0); 673 if (rx_vcc(curr)) return; 674 eni_dev->slow = ENI_VCC(curr)->next; 675 ENI_VCC(curr)->next = ENI_VCC_NOS; 676 barrier(); 677 ENI_VCC(curr)->servicing--; 678 } 679 } 680 681 682 static void get_service(struct atm_dev *dev) 683 { 684 struct eni_dev *eni_dev; 685 struct atm_vcc *vcc; 686 unsigned long vci; 687 688 DPRINTK(">get_service\n"); 689 eni_dev = ENI_DEV(dev); 690 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { 691 vci = readl(eni_dev->service+eni_dev->serv_read*4); 692 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); 693 vcc = eni_dev->rx_map[vci & 1023]; 694 if (!vcc) { 695 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " 696 "found\n",dev->number,vci); 697 continue; /* nasty but we try to go on anyway */ 698 /* @@@ nope, doesn't work */ 699 } 700 EVENT("getting from service\n",0,0); 701 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { 702 EVENT("double service\n",0,0); 703 DPRINTK("Grr, servicing VCC %ld twice\n",vci); 704 continue; 705 } 706 ENI_VCC(vcc)->timestamp = ktime_get_real(); 707 ENI_VCC(vcc)->next = NULL; 708 if (vcc->qos.rxtp.traffic_class == ATM_CBR) { 709 if (eni_dev->fast) 710 ENI_VCC(eni_dev->last_fast)->next = vcc; 711 else eni_dev->fast = vcc; 712 eni_dev->last_fast = vcc; 713 } 714 else { 715 if (eni_dev->slow) 716 ENI_VCC(eni_dev->last_slow)->next = vcc; 717 else eni_dev->slow = vcc; 718 eni_dev->last_slow = vcc; 719 } 720 putting++; 721 ENI_VCC(vcc)->servicing++; 722 } 723 } 724 725 726 static void dequeue_rx(struct atm_dev *dev) 727 { 728 struct eni_dev *eni_dev; 729 struct eni_vcc *eni_vcc; 730 struct atm_vcc *vcc; 731 struct sk_buff *skb; 732 void __iomem *vci_dsc; 733 int first; 734 735 eni_dev = ENI_DEV(dev); 736 first = 1; 737 while (1) { 738 skb = skb_dequeue(&eni_dev->rx_queue); 739 if (!skb) { 740 if (first) { 741 DPRINTK(DEV_LABEL "(itf %d): RX but not " 742 "rxing\n",dev->number); 743 EVENT("nothing to dequeue\n",0,0); 744 } 745 break; 746 } 747 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), 748 ENI_PRV_POS(skb)); 749 rx_dequeued++; 750 vcc = ATM_SKB(skb)->vcc; 751 eni_vcc = ENI_VCC(vcc); 752 first = 0; 753 vci_dsc = eni_dev->vci+vcc->vci*16; 754 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), 755 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, 756 eni_vcc->words)) { 757 EVENT("requeuing\n",0,0); 758 skb_queue_head(&eni_dev->rx_queue,skb); 759 break; 760 } 761 eni_vcc->rxing--; 762 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); 763 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 764 DMA_TO_DEVICE); 765 if (!skb->len) dev_kfree_skb_irq(skb); 766 else { 767 EVENT("pushing (len=%ld)\n",skb->len,0); 768 if (vcc->qos.aal == ATM_AAL0) 769 *(unsigned long *) skb->data = 770 ntohl(*(unsigned long *) skb->data); 771 memset(skb->cb,0,sizeof(struct eni_skb_prv)); 772 vcc->push(vcc,skb); 773 pushed++; 774 } 775 atomic_inc(&vcc->stats->rx); 776 } 777 wake_up(&eni_dev->rx_wait); 778 } 779 780 781 static int open_rx_first(struct atm_vcc *vcc) 782 { 783 struct eni_dev *eni_dev; 784 struct eni_vcc *eni_vcc; 785 unsigned long size; 786 787 DPRINTK("open_rx_first\n"); 788 eni_dev = ENI_DEV(vcc->dev); 789 eni_vcc = ENI_VCC(vcc); 790 eni_vcc->rx = NULL; 791 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; 792 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; 793 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= 794 MID_MAX_BUF_SIZE) 795 size = MID_MAX_BUF_SIZE; 796 eni_vcc->recv = eni_alloc_mem(eni_dev,&size); 797 DPRINTK("rx at 0x%lx\n",eni_vcc->recv); 798 eni_vcc->words = size >> 2; 799 if (!eni_vcc->recv) return -ENOBUFS; 800 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; 801 eni_vcc->descr = 0; 802 eni_vcc->rx_pos = 0; 803 eni_vcc->rxing = 0; 804 eni_vcc->servicing = 0; 805 eni_vcc->next = ENI_VCC_NOS; 806 return 0; 807 } 808 809 810 static int open_rx_second(struct atm_vcc *vcc) 811 { 812 void __iomem *here; 813 struct eni_dev *eni_dev; 814 struct eni_vcc *eni_vcc; 815 unsigned long size; 816 int order; 817 818 DPRINTK("open_rx_second\n"); 819 eni_dev = ENI_DEV(vcc->dev); 820 eni_vcc = ENI_VCC(vcc); 821 if (!eni_vcc->rx) return 0; 822 /* set up VCI descriptor */ 823 here = eni_dev->vci+vcc->vci*16; 824 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); 825 size = eni_vcc->words >> 8; 826 for (order = -1; size; order++) size >>= 1; 827 writel(0,here+4); /* descr, read = 0 */ 828 writel(0,here+8); /* write, state, count = 0 */ 829 if (eni_dev->rx_map[vcc->vci]) 830 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " 831 "in use\n",vcc->dev->number,vcc->vci); 832 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ 833 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << 834 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | 835 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << 836 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); 837 return 0; 838 } 839 840 841 static void close_rx(struct atm_vcc *vcc) 842 { 843 DECLARE_WAITQUEUE(wait,current); 844 void __iomem *here; 845 struct eni_dev *eni_dev; 846 struct eni_vcc *eni_vcc; 847 848 eni_vcc = ENI_VCC(vcc); 849 if (!eni_vcc->rx) return; 850 eni_dev = ENI_DEV(vcc->dev); 851 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { 852 here = eni_dev->vci+vcc->vci*16; 853 /* block receiver */ 854 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << 855 MID_VCI_MODE_SHIFT),here); 856 /* wait for receiver to become idle */ 857 udelay(27); 858 /* discard pending cell */ 859 writel(readl(here) & ~MID_VCI_IN_SERVICE,here); 860 /* don't accept any new ones */ 861 eni_dev->rx_map[vcc->vci] = NULL; 862 /* wait for RX queue to drain */ 863 DPRINTK("eni_close: waiting for RX ...\n"); 864 EVENT("RX closing\n",0,0); 865 add_wait_queue(&eni_dev->rx_wait,&wait); 866 set_current_state(TASK_UNINTERRUPTIBLE); 867 barrier(); 868 for (;;) { 869 /* transition service->rx: rxing++, servicing-- */ 870 if (!eni_vcc->servicing) { 871 barrier(); 872 if (!eni_vcc->rxing) break; 873 } 874 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, 875 eni_vcc->servicing); 876 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, 877 eni_vcc->rxing); 878 schedule(); 879 set_current_state(TASK_UNINTERRUPTIBLE); 880 } 881 for (;;) { 882 int at_end; 883 u32 tmp; 884 885 tasklet_disable(&eni_dev->task); 886 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; 887 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; 888 tasklet_enable(&eni_dev->task); 889 if (at_end) break; 890 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", 891 eni_vcc->rx_pos,tmp); 892 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", 893 eni_vcc->rx_pos,tmp); 894 schedule(); 895 set_current_state(TASK_UNINTERRUPTIBLE); 896 } 897 set_current_state(TASK_RUNNING); 898 remove_wait_queue(&eni_dev->rx_wait,&wait); 899 } 900 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); 901 eni_vcc->rx = NULL; 902 } 903 904 905 static int start_rx(struct atm_dev *dev) 906 { 907 struct eni_dev *eni_dev; 908 909 eni_dev = ENI_DEV(dev); 910 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); 911 if (!eni_dev->rx_map) { 912 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 913 dev->number); 914 free_page((unsigned long) eni_dev->free_list); 915 return -ENOMEM; 916 } 917 eni_dev->rx_mult = DEFAULT_RX_MULT; 918 eni_dev->fast = eni_dev->last_fast = NULL; 919 eni_dev->slow = eni_dev->last_slow = NULL; 920 init_waitqueue_head(&eni_dev->rx_wait); 921 skb_queue_head_init(&eni_dev->rx_queue); 922 eni_dev->serv_read = eni_in(MID_SERV_WRITE); 923 eni_out(0,MID_DMA_WR_RX); 924 return 0; 925 } 926 927 928 /*----------------------------------- TX ------------------------------------*/ 929 930 931 enum enq_res { enq_ok,enq_next,enq_jam }; 932 933 934 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 935 u32 size) 936 { 937 u32 init,words; 938 939 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 940 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 941 #if 0 /* don't complain anymore */ 942 if (paddr & 3) 943 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 944 if (size & 3) 945 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 946 #endif 947 if (paddr & 3) { 948 init = 4-(paddr & 3); 949 if (init > size || size < 7) init = size; 950 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 951 (unsigned long) paddr,init,size); 952 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 953 (chan << MID_DMA_CHAN_SHIFT); 954 dma[(*j)++] = paddr; 955 paddr += init; 956 size -= init; 957 } 958 words = size >> 2; 959 size &= 3; 960 if (words && (paddr & 31)) { 961 init = 8-((paddr & 31) >> 2); 962 if (init > words) init = words; 963 DPRINTK("put_dma: %lx DMA: %d/%d words\n", 964 (unsigned long) paddr,init,words); 965 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 966 (chan << MID_DMA_CHAN_SHIFT); 967 dma[(*j)++] = paddr; 968 paddr += init << 2; 969 words -= init; 970 } 971 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 972 if (words & ~15) { 973 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 974 (unsigned long) paddr,words >> 4,words); 975 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 976 | (chan << MID_DMA_CHAN_SHIFT); 977 dma[(*j)++] = paddr; 978 paddr += (words & ~15) << 2; 979 words &= 15; 980 } 981 #endif 982 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 983 if (words & ~7) { 984 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 985 (unsigned long) paddr,words >> 3,words); 986 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 987 | (chan << MID_DMA_CHAN_SHIFT); 988 dma[(*j)++] = paddr; 989 paddr += (words & ~7) << 2; 990 words &= 7; 991 } 992 #endif 993 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 994 if (words & ~3) { 995 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 996 (unsigned long) paddr,words >> 2,words); 997 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 998 | (chan << MID_DMA_CHAN_SHIFT); 999 dma[(*j)++] = paddr; 1000 paddr += (words & ~3) << 2; 1001 words &= 3; 1002 } 1003 #endif 1004 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 1005 if (words & ~1) { 1006 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 1007 (unsigned long) paddr,words >> 1,words); 1008 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 1009 | (chan << MID_DMA_CHAN_SHIFT); 1010 dma[(*j)++] = paddr; 1011 paddr += (words & ~1) << 2; 1012 words &= 1; 1013 } 1014 #endif 1015 if (words) { 1016 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 1017 words); 1018 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 1019 (chan << MID_DMA_CHAN_SHIFT); 1020 dma[(*j)++] = paddr; 1021 paddr += words << 2; 1022 } 1023 if (size) { 1024 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 1025 size); 1026 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 1027 (chan << MID_DMA_CHAN_SHIFT); 1028 dma[(*j)++] = paddr; 1029 } 1030 } 1031 1032 1033 static enum enq_res do_tx(struct sk_buff *skb) 1034 { 1035 struct atm_vcc *vcc; 1036 struct eni_dev *eni_dev; 1037 struct eni_vcc *eni_vcc; 1038 struct eni_tx *tx; 1039 dma_addr_t paddr; 1040 u32 dma_rd,dma_wr; 1041 u32 size; /* in words */ 1042 int aal5,dma_size,i,j; 1043 1044 DPRINTK(">do_tx\n"); 1045 NULLCHECK(skb); 1046 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1047 vcc = ATM_SKB(skb)->vcc; 1048 NULLCHECK(vcc); 1049 eni_dev = ENI_DEV(vcc->dev); 1050 NULLCHECK(eni_dev); 1051 eni_vcc = ENI_VCC(vcc); 1052 tx = eni_vcc->tx; 1053 NULLCHECK(tx); 1054 #if 0 /* Enable this for testing with the "align" program */ 1055 { 1056 unsigned int hack = *((char *) skb->data)-'0'; 1057 1058 if (hack < 8) { 1059 skb->data += hack; 1060 skb->len -= hack; 1061 } 1062 } 1063 #endif 1064 #if 0 /* should work now */ 1065 if ((unsigned long) skb->data & 3) 1066 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1067 "TX data\n",vcc->dev->number,vcc->vci); 1068 #endif 1069 /* 1070 * Potential future IP speedup: make hard_header big enough to put 1071 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1072 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1073 */ 1074 1075 aal5 = vcc->qos.aal == ATM_AAL5; 1076 /* check space in buffer */ 1077 if (!aal5) 1078 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1079 /* cell without HEC plus segmentation header (includes 1080 four-byte cell header) */ 1081 else { 1082 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1083 /* add AAL5 trailer */ 1084 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1085 /* add segmentation header */ 1086 } 1087 /* 1088 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1089 * to the read pointer ? TX_GAP means to leave some space for what 1090 * the manual calls "too close". 1091 */ 1092 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1093 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1094 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1095 vcc->dev->number,size); 1096 return enq_next; 1097 } 1098 /* check DMA */ 1099 dma_wr = eni_in(MID_DMA_WR_TX); 1100 dma_rd = eni_in(MID_DMA_RD_TX); 1101 dma_size = 3; /* JK for descriptor and final fill, plus final size 1102 mis-alignment fix */ 1103 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1104 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1105 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1106 if (dma_size > TX_DMA_BUF) { 1107 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1108 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1109 } 1110 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1111 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1112 dma_size) { 1113 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1114 vcc->dev->number); 1115 return enq_jam; 1116 } 1117 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 1118 DMA_TO_DEVICE); 1119 ENI_PRV_PADDR(skb) = paddr; 1120 /* prepare DMA queue entries */ 1121 j = 0; 1122 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1123 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1124 MID_DT_JK; 1125 j++; 1126 if (!skb_shinfo(skb)->nr_frags) 1127 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1128 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1129 else { 1130 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1131 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1132 if (i == -1) 1133 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1134 skb->data, 1135 skb_headlen(skb)); 1136 else 1137 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1138 skb_frag_page(&skb_shinfo(skb)->frags[i]) + 1139 skb_frag_off(&skb_shinfo(skb)->frags[i]), 1140 skb_frag_size(&skb_shinfo(skb)->frags[i])); 1141 } 1142 if (skb->len & 3) { 1143 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma, 1144 4 - (skb->len & 3)); 1145 } 1146 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1147 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1148 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1149 MID_DMA_END | MID_DT_JK; 1150 j++; 1151 DPRINTK("DMA at end: %d\n",j); 1152 /* store frame */ 1153 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1154 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1155 (tx->resolution << MID_SEG_RATE_SHIFT) | 1156 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1157 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1158 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1159 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1160 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1161 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1162 DPRINTK("size: %d, len:%d\n",size,skb->len); 1163 if (aal5) 1164 writel(skb->len,tx->send+ 1165 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1166 j = j >> 1; 1167 for (i = 0; i < j; i++) { 1168 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1169 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1170 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1171 } 1172 ENI_PRV_POS(skb) = tx->tx_pos; 1173 ENI_PRV_SIZE(skb) = size; 1174 ENI_VCC(vcc)->txing += size; 1175 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1176 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1177 eni_out(dma_wr,MID_DMA_WR_TX); 1178 skb_queue_tail(&eni_dev->tx_queue,skb); 1179 queued++; 1180 return enq_ok; 1181 } 1182 1183 1184 static void poll_tx(struct atm_dev *dev) 1185 { 1186 struct eni_tx *tx; 1187 struct sk_buff *skb; 1188 enum enq_res res; 1189 int i; 1190 1191 DPRINTK(">poll_tx\n"); 1192 for (i = NR_CHAN-1; i >= 0; i--) { 1193 tx = &ENI_DEV(dev)->tx[i]; 1194 if (tx->send) 1195 while ((skb = skb_dequeue(&tx->backlog))) { 1196 res = do_tx(skb); 1197 if (res == enq_ok) continue; 1198 DPRINTK("re-queuing TX PDU\n"); 1199 skb_queue_head(&tx->backlog,skb); 1200 requeued++; 1201 if (res == enq_jam) return; 1202 break; 1203 } 1204 } 1205 } 1206 1207 1208 static void dequeue_tx(struct atm_dev *dev) 1209 { 1210 struct eni_dev *eni_dev; 1211 struct atm_vcc *vcc; 1212 struct sk_buff *skb; 1213 struct eni_tx *tx; 1214 1215 NULLCHECK(dev); 1216 eni_dev = ENI_DEV(dev); 1217 NULLCHECK(eni_dev); 1218 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1219 vcc = ATM_SKB(skb)->vcc; 1220 NULLCHECK(vcc); 1221 tx = ENI_VCC(vcc)->tx; 1222 NULLCHECK(ENI_VCC(vcc)->tx); 1223 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1224 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1225 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1226 eni_in(MID_TX_DESCRSTART(tx->index))) { 1227 skb_queue_head(&eni_dev->tx_queue,skb); 1228 break; 1229 } 1230 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1231 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 1232 DMA_TO_DEVICE); 1233 if (vcc->pop) vcc->pop(vcc,skb); 1234 else dev_kfree_skb_irq(skb); 1235 atomic_inc(&vcc->stats->tx); 1236 wake_up(&eni_dev->tx_wait); 1237 dma_complete++; 1238 } 1239 } 1240 1241 1242 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1243 { 1244 int i; 1245 1246 for (i = !ubr; i < NR_CHAN; i++) 1247 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1248 return NULL; 1249 } 1250 1251 1252 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1253 int *res,int unlimited) 1254 { 1255 static const int pre_div[] = { 4,16,128,2048 }; 1256 /* 2^(((x+2)^2-(x+2))/2+1) */ 1257 1258 if (unlimited) *pre = *res = 0; 1259 else { 1260 if (*pcr > 0) { 1261 int div; 1262 1263 for (*pre = 0; *pre < 3; (*pre)++) 1264 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1265 div = pre_div[*pre]**pcr; 1266 DPRINTK("min div %d\n",div); 1267 *res = TS_CLOCK/div-1; 1268 } 1269 else { 1270 int div; 1271 1272 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1273 for (*pre = 3; *pre >= 0; (*pre)--) 1274 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1275 if (*pre < 3) (*pre)++; /* else fail later */ 1276 div = pre_div[*pre]*-*pcr; 1277 DPRINTK("max div %d\n",div); 1278 *res = DIV_ROUND_UP(TS_CLOCK, div)-1; 1279 } 1280 if (*res < 0) *res = 0; 1281 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1282 } 1283 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1284 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1285 return 0; 1286 } 1287 1288 1289 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1290 int set_rsv,int set_shp) 1291 { 1292 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1293 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1294 struct eni_tx *tx; 1295 unsigned long size; 1296 void __iomem *mem; 1297 int rate,ubr,unlimited,new_tx; 1298 int pre,res,order; 1299 int error; 1300 1301 rate = atm_pcr_goal(txtp); 1302 ubr = txtp->traffic_class == ATM_UBR; 1303 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1304 rate >= ATM_OC3_PCR); 1305 if (!unlimited) { 1306 size = txtp->max_sdu*eni_dev->tx_mult/100; 1307 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1308 MID_MAX_BUF_SIZE) 1309 size = MID_MAX_BUF_SIZE; 1310 } 1311 else { 1312 if (eni_dev->ubr) { 1313 eni_vcc->tx = eni_dev->ubr; 1314 txtp->pcr = ATM_OC3_PCR; 1315 return 0; 1316 } 1317 size = UBR_BUFFER; 1318 } 1319 new_tx = !eni_vcc->tx; 1320 mem = NULL; /* for gcc */ 1321 if (!new_tx) tx = eni_vcc->tx; 1322 else { 1323 mem = eni_alloc_mem(eni_dev,&size); 1324 if (!mem) return -ENOBUFS; 1325 tx = alloc_tx(eni_dev,unlimited); 1326 if (!tx) { 1327 eni_free_mem(eni_dev,mem,size); 1328 return -EBUSY; 1329 } 1330 DPRINTK("got chan %d\n",tx->index); 1331 tx->reserved = tx->shaping = 0; 1332 tx->send = mem; 1333 tx->words = size >> 2; 1334 skb_queue_head_init(&tx->backlog); 1335 for (order = 0; size > (1 << (order+10)); order++); 1336 eni_out((order << MID_SIZE_SHIFT) | 1337 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1338 MID_TX_PLACE(tx->index)); 1339 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1340 MID_DESCR_START; 1341 } 1342 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1343 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1344 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1345 txtp->max_pcr < rate) error = -EINVAL; 1346 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1347 error = -EINVAL; 1348 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1349 error = -EINVAL; 1350 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1351 error = -EINVAL; 1352 if (error) { 1353 if (new_tx) { 1354 tx->send = NULL; 1355 eni_free_mem(eni_dev,mem,size); 1356 } 1357 return error; 1358 } 1359 txtp->pcr = rate; 1360 if (set_rsv && !ubr) { 1361 eni_dev->tx_bw += tx->reserved; 1362 tx->reserved = rate; 1363 eni_dev->tx_bw -= rate; 1364 } 1365 if (set_shp || (unlimited && new_tx)) { 1366 if (unlimited && new_tx) eni_dev->ubr = tx; 1367 tx->prescaler = pre; 1368 tx->resolution = res; 1369 tx->shaping = rate; 1370 } 1371 if (set_shp) eni_vcc->tx = tx; 1372 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1373 return 0; 1374 } 1375 1376 1377 static int open_tx_first(struct atm_vcc *vcc) 1378 { 1379 ENI_VCC(vcc)->tx = NULL; 1380 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1381 ENI_VCC(vcc)->txing = 0; 1382 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1383 } 1384 1385 1386 static int open_tx_second(struct atm_vcc *vcc) 1387 { 1388 return 0; /* nothing to do */ 1389 } 1390 1391 1392 static void close_tx(struct atm_vcc *vcc) 1393 { 1394 DECLARE_WAITQUEUE(wait,current); 1395 struct eni_dev *eni_dev; 1396 struct eni_vcc *eni_vcc; 1397 1398 eni_vcc = ENI_VCC(vcc); 1399 if (!eni_vcc->tx) return; 1400 eni_dev = ENI_DEV(vcc->dev); 1401 /* wait for TX queue to drain */ 1402 DPRINTK("eni_close: waiting for TX ...\n"); 1403 add_wait_queue(&eni_dev->tx_wait,&wait); 1404 set_current_state(TASK_UNINTERRUPTIBLE); 1405 for (;;) { 1406 int txing; 1407 1408 tasklet_disable(&eni_dev->task); 1409 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1410 tasklet_enable(&eni_dev->task); 1411 if (!txing) break; 1412 DPRINTK("%d TX left\n",eni_vcc->txing); 1413 schedule(); 1414 set_current_state(TASK_UNINTERRUPTIBLE); 1415 } 1416 set_current_state(TASK_RUNNING); 1417 remove_wait_queue(&eni_dev->tx_wait,&wait); 1418 if (eni_vcc->tx != eni_dev->ubr) { 1419 /* 1420 * Looping a few times in here is probably far cheaper than 1421 * keeping track of TX completions all the time, so let's poll 1422 * a bit ... 1423 */ 1424 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1425 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1426 schedule(); 1427 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1428 eni_vcc->tx->send = NULL; 1429 eni_dev->tx_bw += eni_vcc->tx->reserved; 1430 } 1431 eni_vcc->tx = NULL; 1432 } 1433 1434 1435 static int start_tx(struct atm_dev *dev) 1436 { 1437 struct eni_dev *eni_dev; 1438 int i; 1439 1440 eni_dev = ENI_DEV(dev); 1441 eni_dev->lost = 0; 1442 eni_dev->tx_bw = ATM_OC3_PCR; 1443 eni_dev->tx_mult = DEFAULT_TX_MULT; 1444 init_waitqueue_head(&eni_dev->tx_wait); 1445 eni_dev->ubr = NULL; 1446 skb_queue_head_init(&eni_dev->tx_queue); 1447 eni_out(0,MID_DMA_WR_TX); 1448 for (i = 0; i < NR_CHAN; i++) { 1449 eni_dev->tx[i].send = NULL; 1450 eni_dev->tx[i].index = i; 1451 } 1452 return 0; 1453 } 1454 1455 1456 /*--------------------------------- common ----------------------------------*/ 1457 1458 1459 #if 0 /* may become useful again when tuning things */ 1460 1461 static void foo(void) 1462 { 1463 printk(KERN_INFO 1464 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1465 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1466 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1467 rx_enqueued,rx_dequeued,putting,pushed); 1468 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1469 } 1470 1471 #endif 1472 1473 1474 static void bug_int(struct atm_dev *dev,unsigned long reason) 1475 { 1476 DPRINTK(">bug_int\n"); 1477 if (reason & MID_DMA_ERR_ACK) 1478 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1479 "error\n",dev->number); 1480 if (reason & MID_TX_IDENT_MISM) 1481 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1482 "mismatch\n",dev->number); 1483 if (reason & MID_TX_DMA_OVFL) 1484 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1485 "overflow\n",dev->number); 1486 EVENT("---dump ends here---\n",0,0); 1487 printk(KERN_NOTICE "---recent events---\n"); 1488 event_dump(); 1489 } 1490 1491 1492 static irqreturn_t eni_int(int irq,void *dev_id) 1493 { 1494 struct atm_dev *dev; 1495 struct eni_dev *eni_dev; 1496 u32 reason; 1497 1498 DPRINTK(">eni_int\n"); 1499 dev = dev_id; 1500 eni_dev = ENI_DEV(dev); 1501 reason = eni_in(MID_ISA); 1502 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1503 /* 1504 * Must handle these two right now, because reading ISA doesn't clear 1505 * them, so they re-occur and we never make it to the tasklet. Since 1506 * they're rare, we don't mind the occasional invocation of eni_tasklet 1507 * with eni_dev->events == 0. 1508 */ 1509 if (reason & MID_STAT_OVFL) { 1510 EVENT("stat overflow\n",0,0); 1511 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1512 } 1513 if (reason & MID_SUNI_INT) { 1514 EVENT("SUNI int\n",0,0); 1515 dev->phy->interrupt(dev); 1516 #if 0 1517 foo(); 1518 #endif 1519 } 1520 spin_lock(&eni_dev->lock); 1521 eni_dev->events |= reason; 1522 spin_unlock(&eni_dev->lock); 1523 tasklet_schedule(&eni_dev->task); 1524 return IRQ_HANDLED; 1525 } 1526 1527 1528 static void eni_tasklet(unsigned long data) 1529 { 1530 struct atm_dev *dev = (struct atm_dev *) data; 1531 struct eni_dev *eni_dev = ENI_DEV(dev); 1532 unsigned long flags; 1533 u32 events; 1534 1535 DPRINTK("eni_tasklet (dev %p)\n",dev); 1536 spin_lock_irqsave(&eni_dev->lock,flags); 1537 events = xchg(&eni_dev->events,0); 1538 spin_unlock_irqrestore(&eni_dev->lock,flags); 1539 if (events & MID_RX_DMA_COMPLETE) { 1540 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1541 dequeue_rx(dev); 1542 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1543 poll_rx(dev); 1544 EVENT("poll_rx done\n",0,0); 1545 /* poll_tx ? */ 1546 } 1547 if (events & MID_SERVICE) { 1548 EVENT("INT: service, starting get_service\n",0,0); 1549 get_service(dev); 1550 EVENT("get_service done, starting poll_rx\n",0,0); 1551 poll_rx(dev); 1552 EVENT("poll_rx done\n",0,0); 1553 } 1554 if (events & MID_TX_DMA_COMPLETE) { 1555 EVENT("INT: TX DMA COMPLETE\n",0,0); 1556 dequeue_tx(dev); 1557 } 1558 if (events & MID_TX_COMPLETE) { 1559 EVENT("INT: TX COMPLETE\n",0,0); 1560 tx_complete++; 1561 wake_up(&eni_dev->tx_wait); 1562 /* poll_rx ? */ 1563 } 1564 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1565 EVENT("bug interrupt\n",0,0); 1566 bug_int(dev,events); 1567 } 1568 poll_tx(dev); 1569 } 1570 1571 1572 /*--------------------------------- entries ---------------------------------*/ 1573 1574 1575 static char * const media_name[] = { 1576 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1577 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1578 "TAXI","09?", "10?", "11?", /* 8-11 */ 1579 "12?", "13?", "14?", "15?", /* 12-15 */ 1580 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1581 "UTP", "21?", "22?", "23?", /* 20-23 */ 1582 "24?", "25?", "26?", "27?", /* 24-27 */ 1583 "28?", "29?", "30?", "31?" /* 28-31 */ 1584 }; 1585 1586 1587 #define SET_SEPROM \ 1588 ({ if (!error && !pci_error) { \ 1589 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1590 udelay(10); /* 10 usecs */ \ 1591 } }) 1592 #define GET_SEPROM \ 1593 ({ if (!error && !pci_error) { \ 1594 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1595 udelay(10); /* 10 usecs */ \ 1596 } }) 1597 1598 1599 static int get_esi_asic(struct atm_dev *dev) 1600 { 1601 struct eni_dev *eni_dev; 1602 unsigned char tonga; 1603 int error,failed,pci_error; 1604 int address,i,j; 1605 1606 eni_dev = ENI_DEV(dev); 1607 error = pci_error = 0; 1608 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1609 SET_SEPROM; 1610 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1611 /* start operation */ 1612 tonga |= SEPROM_DATA; 1613 SET_SEPROM; 1614 tonga |= SEPROM_CLK; 1615 SET_SEPROM; 1616 tonga &= ~SEPROM_DATA; 1617 SET_SEPROM; 1618 tonga &= ~SEPROM_CLK; 1619 SET_SEPROM; 1620 /* send address */ 1621 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1622 for (j = 7; j >= 0; j--) { 1623 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1624 tonga & ~SEPROM_DATA; 1625 SET_SEPROM; 1626 tonga |= SEPROM_CLK; 1627 SET_SEPROM; 1628 tonga &= ~SEPROM_CLK; 1629 SET_SEPROM; 1630 } 1631 /* get ack */ 1632 tonga |= SEPROM_DATA; 1633 SET_SEPROM; 1634 tonga |= SEPROM_CLK; 1635 SET_SEPROM; 1636 GET_SEPROM; 1637 failed = tonga & SEPROM_DATA; 1638 tonga &= ~SEPROM_CLK; 1639 SET_SEPROM; 1640 tonga |= SEPROM_DATA; 1641 SET_SEPROM; 1642 if (failed) error = -EIO; 1643 else { 1644 dev->esi[i] = 0; 1645 for (j = 7; j >= 0; j--) { 1646 dev->esi[i] <<= 1; 1647 tonga |= SEPROM_DATA; 1648 SET_SEPROM; 1649 tonga |= SEPROM_CLK; 1650 SET_SEPROM; 1651 GET_SEPROM; 1652 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1653 tonga &= ~SEPROM_CLK; 1654 SET_SEPROM; 1655 tonga |= SEPROM_DATA; 1656 SET_SEPROM; 1657 } 1658 /* get ack */ 1659 tonga |= SEPROM_DATA; 1660 SET_SEPROM; 1661 tonga |= SEPROM_CLK; 1662 SET_SEPROM; 1663 GET_SEPROM; 1664 if (!(tonga & SEPROM_DATA)) error = -EIO; 1665 tonga &= ~SEPROM_CLK; 1666 SET_SEPROM; 1667 tonga |= SEPROM_DATA; 1668 SET_SEPROM; 1669 } 1670 /* stop operation */ 1671 tonga &= ~SEPROM_DATA; 1672 SET_SEPROM; 1673 tonga |= SEPROM_CLK; 1674 SET_SEPROM; 1675 tonga |= SEPROM_DATA; 1676 SET_SEPROM; 1677 } 1678 if (pci_error) { 1679 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1680 "(0x%02x)\n",dev->number,pci_error); 1681 error = -EIO; 1682 } 1683 return error; 1684 } 1685 1686 1687 #undef SET_SEPROM 1688 #undef GET_SEPROM 1689 1690 1691 static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1692 { 1693 void __iomem *mac_base; 1694 int i; 1695 1696 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1697 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1698 return 0; 1699 } 1700 1701 1702 static int eni_do_init(struct atm_dev *dev) 1703 { 1704 struct midway_eprom __iomem *eprom; 1705 struct eni_dev *eni_dev; 1706 struct pci_dev *pci_dev; 1707 unsigned long real_base; 1708 void __iomem *base; 1709 int error,i,last; 1710 1711 DPRINTK(">eni_init\n"); 1712 dev->ci_range.vpi_bits = 0; 1713 dev->ci_range.vci_bits = NR_VCI_LD; 1714 dev->link_rate = ATM_OC3_PCR; 1715 eni_dev = ENI_DEV(dev); 1716 pci_dev = eni_dev->pci_dev; 1717 real_base = pci_resource_start(pci_dev, 0); 1718 eni_dev->irq = pci_dev->irq; 1719 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1720 PCI_COMMAND_MEMORY | 1721 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1722 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1723 "(0x%02x)\n",dev->number,error); 1724 return -EIO; 1725 } 1726 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1727 dev->number,pci_dev->revision,real_base,eni_dev->irq); 1728 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 1729 printk("\n"); 1730 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1731 "mapping\n",dev->number); 1732 return -ENOMEM; 1733 } 1734 eni_dev->ioaddr = base; 1735 eni_dev->base_diff = real_base - (unsigned long) base; 1736 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1737 if (!eni_dev->asic) { 1738 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1739 if (readl(&eprom->magic) != ENI155_MAGIC) { 1740 printk("\n"); 1741 printk(KERN_ERR DEV_LABEL 1742 "(itf %d): bad magic - expected 0x%x, got 0x%x\n", 1743 dev->number, ENI155_MAGIC, 1744 (unsigned)readl(&eprom->magic)); 1745 error = -EINVAL; 1746 goto unmap; 1747 } 1748 } 1749 eni_dev->phy = base+PHY_BASE; 1750 eni_dev->reg = base+REG_BASE; 1751 eni_dev->ram = base+RAM_BASE; 1752 last = MAP_MAX_SIZE-RAM_BASE; 1753 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1754 writel(0x55555555,eni_dev->ram+i); 1755 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1756 else { 1757 writel(0xAAAAAAAA,eni_dev->ram+i); 1758 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1759 else writel(i,eni_dev->ram+i); 1760 } 1761 } 1762 for (i = 0; i < last; i += RAM_INCREMENT) 1763 if (readl(eni_dev->ram+i) != i) break; 1764 eni_dev->mem = i; 1765 memset_io(eni_dev->ram,0,eni_dev->mem); 1766 /* TODO: should shrink allocation now */ 1767 printk("mem=%dkB (",eni_dev->mem >> 10); 1768 /* TODO: check for non-SUNI, check for TAXI ? */ 1769 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1770 printk(")\n"); 1771 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1772 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1773 error = -EINVAL; 1774 goto unmap; 1775 } 1776 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1777 if (error) 1778 goto unmap; 1779 for (i = 0; i < ESI_LEN; i++) 1780 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1781 printk(")\n"); 1782 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1783 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1784 media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]); 1785 1786 error = suni_init(dev); 1787 if (error) 1788 goto unmap; 1789 out: 1790 return error; 1791 unmap: 1792 iounmap(base); 1793 goto out; 1794 } 1795 1796 static void eni_do_release(struct atm_dev *dev) 1797 { 1798 struct eni_dev *ed = ENI_DEV(dev); 1799 1800 dev->phy->stop(dev); 1801 dev->phy = NULL; 1802 iounmap(ed->ioaddr); 1803 } 1804 1805 static int eni_start(struct atm_dev *dev) 1806 { 1807 struct eni_dev *eni_dev; 1808 1809 void __iomem *buf; 1810 unsigned long buffer_mem; 1811 int error; 1812 1813 DPRINTK(">eni_start\n"); 1814 eni_dev = ENI_DEV(dev); 1815 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { 1816 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1817 dev->number,eni_dev->irq); 1818 error = -EAGAIN; 1819 goto out; 1820 } 1821 pci_set_master(eni_dev->pci_dev); 1822 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1823 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1824 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1825 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1826 "master (0x%02x)\n",dev->number,error); 1827 goto free_irq; 1828 } 1829 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1830 END_SWAP_DMA))) { 1831 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1832 "(0x%02x)\n",dev->number,error); 1833 goto free_irq; 1834 } 1835 /* determine addresses of internal tables */ 1836 eni_dev->vci = eni_dev->ram; 1837 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1838 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1839 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1840 buf = eni_dev->service+NR_SERVICE*4; 1841 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1842 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1843 eni_dev->service,buf); 1844 spin_lock_init(&eni_dev->lock); 1845 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1846 eni_dev->events = 0; 1847 /* initialize memory management */ 1848 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1849 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1850 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1, 1851 sizeof(*eni_dev->free_list), 1852 GFP_KERNEL); 1853 if (!eni_dev->free_list) { 1854 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1855 dev->number); 1856 error = -ENOMEM; 1857 goto free_irq; 1858 } 1859 eni_dev->free_len = 0; 1860 eni_put_free(eni_dev,buf,buffer_mem); 1861 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1862 /* 1863 * byte_addr free (k) 1864 * 0x00000000 512 VCI table 1865 * 0x00004000 496 RX DMA 1866 * 0x00005000 492 TX DMA 1867 * 0x00006000 488 service list 1868 * 0x00007000 484 buffers 1869 * 0x00080000 0 end (512kB) 1870 */ 1871 eni_out(0xffffffff,MID_IE); 1872 error = start_tx(dev); 1873 if (error) goto free_list; 1874 error = start_rx(dev); 1875 if (error) goto free_list; 1876 error = dev->phy->start(dev); 1877 if (error) goto free_list; 1878 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1879 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1880 MID_MC_S); 1881 /* Tonga uses SBus INTReq1 */ 1882 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1883 return 0; 1884 1885 free_list: 1886 kfree(eni_dev->free_list); 1887 1888 free_irq: 1889 free_irq(eni_dev->irq, dev); 1890 1891 out: 1892 return error; 1893 } 1894 1895 1896 static void eni_close(struct atm_vcc *vcc) 1897 { 1898 DPRINTK(">eni_close\n"); 1899 if (!ENI_VCC(vcc)) return; 1900 clear_bit(ATM_VF_READY,&vcc->flags); 1901 close_rx(vcc); 1902 close_tx(vcc); 1903 DPRINTK("eni_close: done waiting\n"); 1904 /* deallocate memory */ 1905 kfree(ENI_VCC(vcc)); 1906 vcc->dev_data = NULL; 1907 clear_bit(ATM_VF_ADDR,&vcc->flags); 1908 /*foo();*/ 1909 } 1910 1911 1912 static int eni_open(struct atm_vcc *vcc) 1913 { 1914 struct eni_vcc *eni_vcc; 1915 int error; 1916 short vpi = vcc->vpi; 1917 int vci = vcc->vci; 1918 1919 DPRINTK(">eni_open\n"); 1920 EVENT("eni_open\n",0,0); 1921 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1922 vcc->dev_data = NULL; 1923 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1924 set_bit(ATM_VF_ADDR,&vcc->flags); 1925 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1926 return -EINVAL; 1927 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1928 vcc->vci); 1929 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1930 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1931 if (!eni_vcc) return -ENOMEM; 1932 vcc->dev_data = eni_vcc; 1933 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1934 if ((error = open_rx_first(vcc))) { 1935 eni_close(vcc); 1936 return error; 1937 } 1938 if ((error = open_tx_first(vcc))) { 1939 eni_close(vcc); 1940 return error; 1941 } 1942 } 1943 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1944 if ((error = open_rx_second(vcc))) { 1945 eni_close(vcc); 1946 return error; 1947 } 1948 if ((error = open_tx_second(vcc))) { 1949 eni_close(vcc); 1950 return error; 1951 } 1952 set_bit(ATM_VF_READY,&vcc->flags); 1953 /* should power down SUNI while !ref_count @@@ */ 1954 return 0; 1955 } 1956 1957 1958 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1959 { 1960 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1961 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1962 struct sk_buff *skb; 1963 int error,rate,rsv,shp; 1964 1965 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1966 if (tx == eni_dev->ubr) return -EBADFD; 1967 rate = atm_pcr_goal(&qos->txtp); 1968 if (rate < 0) rate = -rate; 1969 rsv = shp = 0; 1970 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1971 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1972 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1973 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1974 if (!rsv && !shp) return 0; 1975 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1976 if (error) return error; 1977 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1978 /* 1979 * Walk through the send buffer and patch the rate information in all 1980 * segmentation buffer descriptors of this VCC. 1981 */ 1982 tasklet_disable(&eni_dev->task); 1983 skb_queue_walk(&eni_dev->tx_queue, skb) { 1984 void __iomem *dsc; 1985 1986 if (ATM_SKB(skb)->vcc != vcc) continue; 1987 dsc = tx->send+ENI_PRV_POS(skb)*4; 1988 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1989 (tx->prescaler << MID_SEG_PR_SHIFT) | 1990 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1991 } 1992 tasklet_enable(&eni_dev->task); 1993 return 0; 1994 } 1995 1996 1997 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1998 { 1999 struct eni_dev *eni_dev = ENI_DEV(dev); 2000 2001 if (cmd == ENI_MEMDUMP) { 2002 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2003 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 2004 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 2005 dump(dev); 2006 return 0; 2007 } 2008 if (cmd == ENI_SETMULT) { 2009 struct eni_multipliers mult; 2010 2011 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2012 if (copy_from_user(&mult, arg, 2013 sizeof(struct eni_multipliers))) 2014 return -EFAULT; 2015 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2016 mult.tx > 65536 || mult.rx > 65536) 2017 return -EINVAL; 2018 if (mult.tx) eni_dev->tx_mult = mult.tx; 2019 if (mult.rx) eni_dev->rx_mult = mult.rx; 2020 return 0; 2021 } 2022 if (cmd == ATM_SETCIRANGE) { 2023 struct atm_cirange ci; 2024 2025 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2026 return -EFAULT; 2027 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2028 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2029 return 0; 2030 return -EINVAL; 2031 } 2032 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2033 return dev->phy->ioctl(dev,cmd,arg); 2034 } 2035 2036 2037 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2038 void __user *optval,int optlen) 2039 { 2040 return -EINVAL; 2041 } 2042 2043 2044 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2045 void __user *optval,unsigned int optlen) 2046 { 2047 return -EINVAL; 2048 } 2049 2050 2051 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2052 { 2053 enum enq_res res; 2054 2055 DPRINTK(">eni_send\n"); 2056 if (!ENI_VCC(vcc)->tx) { 2057 if (vcc->pop) vcc->pop(vcc,skb); 2058 else dev_kfree_skb(skb); 2059 return -EINVAL; 2060 } 2061 if (!skb) { 2062 printk(KERN_CRIT "!skb in eni_send ?\n"); 2063 if (vcc->pop) vcc->pop(vcc,skb); 2064 return -EINVAL; 2065 } 2066 if (vcc->qos.aal == ATM_AAL0) { 2067 if (skb->len != ATM_CELL_SIZE-1) { 2068 if (vcc->pop) vcc->pop(vcc,skb); 2069 else dev_kfree_skb(skb); 2070 return -EINVAL; 2071 } 2072 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2073 } 2074 submitted++; 2075 ATM_SKB(skb)->vcc = vcc; 2076 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2077 res = do_tx(skb); 2078 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2079 if (res == enq_ok) return 0; 2080 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2081 backlogged++; 2082 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2083 return 0; 2084 } 2085 2086 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2087 unsigned long addr) 2088 { 2089 writel(value,ENI_DEV(dev)->phy+addr*4); 2090 } 2091 2092 2093 2094 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2095 { 2096 return readl(ENI_DEV(dev)->phy+addr*4); 2097 } 2098 2099 2100 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2101 { 2102 struct sock *s; 2103 static const char *signal[] = { "LOST","unknown","okay" }; 2104 struct eni_dev *eni_dev = ENI_DEV(dev); 2105 struct atm_vcc *vcc; 2106 int left,i; 2107 2108 left = *pos; 2109 if (!left) 2110 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2111 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2112 eni_dev->mem >> 10,eni_dev->tx_bw); 2113 if (!--left) 2114 return sprintf(page,"%4sBursts: TX" 2115 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2116 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2117 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2118 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2119 " none" 2120 #endif 2121 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2122 " 16W" 2123 #endif 2124 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2125 " 8W" 2126 #endif 2127 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2128 " 4W" 2129 #endif 2130 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2131 " 2W" 2132 #endif 2133 ", RX" 2134 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2135 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2136 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2137 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2138 " none" 2139 #endif 2140 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2141 " 16W" 2142 #endif 2143 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2144 " 8W" 2145 #endif 2146 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2147 " 4W" 2148 #endif 2149 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2150 " 2W" 2151 #endif 2152 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2153 " (default)" 2154 #endif 2155 "\n",""); 2156 if (!--left) 2157 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2158 "",eni_dev->tx_mult,eni_dev->rx_mult); 2159 for (i = 0; i < NR_CHAN; i++) { 2160 struct eni_tx *tx = eni_dev->tx+i; 2161 2162 if (!tx->send) continue; 2163 if (!--left) { 2164 return sprintf(page, "tx[%d]: 0x%lx-0x%lx " 2165 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2166 (unsigned long) (tx->send - eni_dev->ram), 2167 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2168 tx->reserved,tx->shaping, 2169 tx == eni_dev->ubr ? " (UBR)" : ""); 2170 } 2171 if (--left) continue; 2172 return sprintf(page,"%10sbacklog %u packets\n","", 2173 skb_queue_len(&tx->backlog)); 2174 } 2175 read_lock(&vcc_sklist_lock); 2176 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2177 struct hlist_head *head = &vcc_hash[i]; 2178 2179 sk_for_each(s, head) { 2180 struct eni_vcc *eni_vcc; 2181 int length; 2182 2183 vcc = atm_sk(s); 2184 if (vcc->dev != dev) 2185 continue; 2186 eni_vcc = ENI_VCC(vcc); 2187 if (--left) continue; 2188 length = sprintf(page,"vcc %4d: ",vcc->vci); 2189 if (eni_vcc->rx) { 2190 length += sprintf(page+length, "0x%lx-0x%lx " 2191 "(%6ld bytes)", 2192 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2193 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2194 eni_vcc->words*4); 2195 if (eni_vcc->tx) length += sprintf(page+length,", "); 2196 } 2197 if (eni_vcc->tx) 2198 length += sprintf(page+length,"tx[%d], txing %d bytes", 2199 eni_vcc->tx->index,eni_vcc->txing); 2200 page[length] = '\n'; 2201 read_unlock(&vcc_sklist_lock); 2202 return length+1; 2203 } 2204 } 2205 read_unlock(&vcc_sklist_lock); 2206 for (i = 0; i < eni_dev->free_len; i++) { 2207 struct eni_free *fe = eni_dev->free_list+i; 2208 unsigned long offset; 2209 2210 if (--left) continue; 2211 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2212 return sprintf(page,"free %p-%p (%6d bytes)\n", 2213 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2214 1 << fe->order); 2215 } 2216 return 0; 2217 } 2218 2219 2220 static const struct atmdev_ops ops = { 2221 .open = eni_open, 2222 .close = eni_close, 2223 .ioctl = eni_ioctl, 2224 .getsockopt = eni_getsockopt, 2225 .setsockopt = eni_setsockopt, 2226 .send = eni_send, 2227 .phy_put = eni_phy_put, 2228 .phy_get = eni_phy_get, 2229 .change_qos = eni_change_qos, 2230 .proc_read = eni_proc_read 2231 }; 2232 2233 2234 static int eni_init_one(struct pci_dev *pci_dev, 2235 const struct pci_device_id *ent) 2236 { 2237 struct atm_dev *dev; 2238 struct eni_dev *eni_dev; 2239 struct eni_zero *zero; 2240 int rc; 2241 2242 rc = pci_enable_device(pci_dev); 2243 if (rc < 0) 2244 goto out; 2245 2246 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); 2247 if (rc < 0) 2248 goto out; 2249 2250 rc = -ENOMEM; 2251 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); 2252 if (!eni_dev) 2253 goto err_disable; 2254 2255 zero = &eni_dev->zero; 2256 zero->addr = dma_alloc_coherent(&pci_dev->dev, 2257 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL); 2258 if (!zero->addr) 2259 goto err_kfree; 2260 2261 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); 2262 if (!dev) 2263 goto err_free_consistent; 2264 2265 dev->dev_data = eni_dev; 2266 pci_set_drvdata(pci_dev, dev); 2267 eni_dev->pci_dev = pci_dev; 2268 eni_dev->asic = ent->driver_data; 2269 2270 rc = eni_do_init(dev); 2271 if (rc < 0) 2272 goto err_unregister; 2273 2274 rc = eni_start(dev); 2275 if (rc < 0) 2276 goto err_eni_release; 2277 2278 eni_dev->more = eni_boards; 2279 eni_boards = dev; 2280 out: 2281 return rc; 2282 2283 err_eni_release: 2284 eni_do_release(dev); 2285 err_unregister: 2286 atm_dev_deregister(dev); 2287 err_free_consistent: 2288 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2289 err_kfree: 2290 kfree(eni_dev); 2291 err_disable: 2292 pci_disable_device(pci_dev); 2293 goto out; 2294 } 2295 2296 2297 static const struct pci_device_id eni_pci_tbl[] = { 2298 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, 2299 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, 2300 { 0, } 2301 }; 2302 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2303 2304 2305 static void eni_remove_one(struct pci_dev *pdev) 2306 { 2307 struct atm_dev *dev = pci_get_drvdata(pdev); 2308 struct eni_dev *ed = ENI_DEV(dev); 2309 struct eni_zero *zero = &ed->zero; 2310 2311 eni_do_release(dev); 2312 atm_dev_deregister(dev); 2313 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2314 kfree(ed); 2315 pci_disable_device(pdev); 2316 } 2317 2318 2319 static struct pci_driver eni_driver = { 2320 .name = DEV_LABEL, 2321 .id_table = eni_pci_tbl, 2322 .probe = eni_init_one, 2323 .remove = eni_remove_one, 2324 }; 2325 2326 2327 static int __init eni_init(void) 2328 { 2329 struct sk_buff *skb; /* dummy for sizeof */ 2330 2331 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv)); 2332 return pci_register_driver(&eni_driver); 2333 } 2334 2335 2336 module_init(eni_init); 2337 /* @@@ since exit routine not defined, this module can not be unloaded */ 2338 2339 MODULE_LICENSE("GPL"); 2340