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 80static 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 103static const char *ev[EV]; 104static unsigned long ev_a[EV],ev_b[EV]; 105static int ec = 0; 106 107 108static 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 117static 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 147static 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 151static 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 161static 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 172static 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 196static 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 229static 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 267static 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 307static 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 338static 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 478trouble: 479 if (paddr) 480 dma_unmap_single(&eni_dev->pci_dev->dev,paddr,skb->len, 481 DMA_FROM_DEVICE); 482dma_map_error: 483 if (skb) dev_kfree_skb_irq(skb); 484 return -1; 485} 486 487 488static 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 506static 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 543static 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 612static 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 651static 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 676static 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 720static 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 775static 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 804static 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 835static 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 899static 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 925enum enq_res { enq_ok,enq_next,enq_jam }; 926 927 928static 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 1027static 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 unsigned char skb_data3; 1038 1039 DPRINTK(">do_tx\n"); 1040 NULLCHECK(skb); 1041 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1042 vcc = ATM_SKB(skb)->vcc; 1043 NULLCHECK(vcc); 1044 eni_dev = ENI_DEV(vcc->dev); 1045 NULLCHECK(eni_dev); 1046 eni_vcc = ENI_VCC(vcc); 1047 tx = eni_vcc->tx; 1048 NULLCHECK(tx); 1049#if 0 /* Enable this for testing with the "align" program */ 1050 { 1051 unsigned int hack = *((char *) skb->data)-'0'; 1052 1053 if (hack < 8) { 1054 skb->data += hack; 1055 skb->len -= hack; 1056 } 1057 } 1058#endif 1059#if 0 /* should work now */ 1060 if ((unsigned long) skb->data & 3) 1061 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1062 "TX data\n",vcc->dev->number,vcc->vci); 1063#endif 1064 /* 1065 * Potential future IP speedup: make hard_header big enough to put 1066 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1067 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1068 */ 1069 1070 aal5 = vcc->qos.aal == ATM_AAL5; 1071 /* check space in buffer */ 1072 if (!aal5) 1073 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1074 /* cell without HEC plus segmentation header (includes 1075 four-byte cell header) */ 1076 else { 1077 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1078 /* add AAL5 trailer */ 1079 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1080 /* add segmentation header */ 1081 } 1082 /* 1083 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1084 * to the read pointer ? TX_GAP means to leave some space for what 1085 * the manual calls "too close". 1086 */ 1087 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1088 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1089 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1090 vcc->dev->number,size); 1091 return enq_next; 1092 } 1093 /* check DMA */ 1094 dma_wr = eni_in(MID_DMA_WR_TX); 1095 dma_rd = eni_in(MID_DMA_RD_TX); 1096 dma_size = 3; /* JK for descriptor and final fill, plus final size 1097 mis-alignment fix */ 1098DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1099 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1100 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1101 if (dma_size > TX_DMA_BUF) { 1102 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1103 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1104 } 1105 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1106 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1107 dma_size) { 1108 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1109 vcc->dev->number); 1110 return enq_jam; 1111 } 1112 skb_data3 = skb->data[3]; 1113 paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len, 1114 DMA_TO_DEVICE); 1115 if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr)) 1116 return enq_next; 1117 ENI_PRV_PADDR(skb) = paddr; 1118 /* prepare DMA queue entries */ 1119 j = 0; 1120 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1121 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1122 MID_DT_JK; 1123 j++; 1124 if (!skb_shinfo(skb)->nr_frags) 1125 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1126 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1127 else { 1128DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1129 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1130 if (i == -1) 1131 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1132 skb->data, 1133 skb_headlen(skb)); 1134 else 1135 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1136 skb_frag_page(&skb_shinfo(skb)->frags[i]) + 1137 skb_frag_off(&skb_shinfo(skb)->frags[i]), 1138 skb_frag_size(&skb_shinfo(skb)->frags[i])); 1139 } 1140 if (skb->len & 3) { 1141 put_dma(tx->index, eni_dev->dma, &j, eni_dev->zero.dma, 1142 4 - (skb->len & 3)); 1143 } 1144 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1145 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1146 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1147 MID_DMA_END | MID_DT_JK; 1148 j++; 1149 DPRINTK("DMA at end: %d\n",j); 1150 /* store frame */ 1151 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1152 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1153 (tx->resolution << MID_SEG_RATE_SHIFT) | 1154 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1155/*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1156 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1157 (aal5 ? 0 : (skb_data3 & 0xf)) | 1158 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1159 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1160 DPRINTK("size: %d, len:%d\n",size,skb->len); 1161 if (aal5) 1162 writel(skb->len,tx->send+ 1163 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1164 j = j >> 1; 1165 for (i = 0; i < j; i++) { 1166 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1167 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1168 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1169 } 1170 ENI_PRV_POS(skb) = tx->tx_pos; 1171 ENI_PRV_SIZE(skb) = size; 1172 ENI_VCC(vcc)->txing += size; 1173 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1174 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1175 eni_out(dma_wr,MID_DMA_WR_TX); 1176 skb_queue_tail(&eni_dev->tx_queue,skb); 1177 queued++; 1178 return enq_ok; 1179} 1180 1181 1182static void poll_tx(struct atm_dev *dev) 1183{ 1184 struct eni_tx *tx; 1185 struct sk_buff *skb; 1186 enum enq_res res; 1187 int i; 1188 1189 DPRINTK(">poll_tx\n"); 1190 for (i = NR_CHAN-1; i >= 0; i--) { 1191 tx = &ENI_DEV(dev)->tx[i]; 1192 if (tx->send) 1193 while ((skb = skb_dequeue(&tx->backlog))) { 1194 res = do_tx(skb); 1195 if (res == enq_ok) continue; 1196 DPRINTK("re-queuing TX PDU\n"); 1197 skb_queue_head(&tx->backlog,skb); 1198 requeued++; 1199 if (res == enq_jam) return; 1200 break; 1201 } 1202 } 1203} 1204 1205 1206static void dequeue_tx(struct atm_dev *dev) 1207{ 1208 struct eni_dev *eni_dev; 1209 struct atm_vcc *vcc; 1210 struct sk_buff *skb; 1211 struct eni_tx *tx; 1212 1213 NULLCHECK(dev); 1214 eni_dev = ENI_DEV(dev); 1215 NULLCHECK(eni_dev); 1216 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1217 vcc = ATM_SKB(skb)->vcc; 1218 NULLCHECK(vcc); 1219 tx = ENI_VCC(vcc)->tx; 1220 NULLCHECK(ENI_VCC(vcc)->tx); 1221 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1222 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1223 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1224 eni_in(MID_TX_DESCRSTART(tx->index))) { 1225 skb_queue_head(&eni_dev->tx_queue,skb); 1226 break; 1227 } 1228 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1229 dma_unmap_single(&eni_dev->pci_dev->dev,ENI_PRV_PADDR(skb),skb->len, 1230 DMA_TO_DEVICE); 1231 if (vcc->pop) vcc->pop(vcc,skb); 1232 else dev_kfree_skb_irq(skb); 1233 atomic_inc(&vcc->stats->tx); 1234 wake_up(&eni_dev->tx_wait); 1235 dma_complete++; 1236 } 1237} 1238 1239 1240static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1241{ 1242 int i; 1243 1244 for (i = !ubr; i < NR_CHAN; i++) 1245 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1246 return NULL; 1247} 1248 1249 1250static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1251 int *res,int unlimited) 1252{ 1253 static const int pre_div[] = { 4,16,128,2048 }; 1254 /* 2^(((x+2)^2-(x+2))/2+1) */ 1255 1256 if (unlimited) *pre = *res = 0; 1257 else { 1258 if (*pcr > 0) { 1259 int div; 1260 1261 for (*pre = 0; *pre < 3; (*pre)++) 1262 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1263 div = pre_div[*pre]**pcr; 1264 DPRINTK("min div %d\n",div); 1265 *res = TS_CLOCK/div-1; 1266 } 1267 else { 1268 int div; 1269 1270 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1271 for (*pre = 3; *pre >= 0; (*pre)--) 1272 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1273 if (*pre < 3) (*pre)++; /* else fail later */ 1274 div = pre_div[*pre]*-*pcr; 1275 DPRINTK("max div %d\n",div); 1276 *res = DIV_ROUND_UP(TS_CLOCK, div)-1; 1277 } 1278 if (*res < 0) *res = 0; 1279 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1280 } 1281 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1282 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1283 return 0; 1284} 1285 1286 1287static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1288 int set_rsv,int set_shp) 1289{ 1290 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1291 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1292 struct eni_tx *tx; 1293 unsigned long size; 1294 void __iomem *mem; 1295 int rate,ubr,unlimited,new_tx; 1296 int pre,res,order; 1297 int error; 1298 1299 rate = atm_pcr_goal(txtp); 1300 ubr = txtp->traffic_class == ATM_UBR; 1301 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1302 rate >= ATM_OC3_PCR); 1303 if (!unlimited) { 1304 size = txtp->max_sdu*eni_dev->tx_mult/100; 1305 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1306 MID_MAX_BUF_SIZE) 1307 size = MID_MAX_BUF_SIZE; 1308 } 1309 else { 1310 if (eni_dev->ubr) { 1311 eni_vcc->tx = eni_dev->ubr; 1312 txtp->pcr = ATM_OC3_PCR; 1313 return 0; 1314 } 1315 size = UBR_BUFFER; 1316 } 1317 new_tx = !eni_vcc->tx; 1318 mem = NULL; /* for gcc */ 1319 if (!new_tx) tx = eni_vcc->tx; 1320 else { 1321 mem = eni_alloc_mem(eni_dev,&size); 1322 if (!mem) return -ENOBUFS; 1323 tx = alloc_tx(eni_dev,unlimited); 1324 if (!tx) { 1325 eni_free_mem(eni_dev,mem,size); 1326 return -EBUSY; 1327 } 1328 DPRINTK("got chan %d\n",tx->index); 1329 tx->reserved = tx->shaping = 0; 1330 tx->send = mem; 1331 tx->words = size >> 2; 1332 skb_queue_head_init(&tx->backlog); 1333 for (order = 0; size > (1 << (order+10)); order++); 1334 eni_out((order << MID_SIZE_SHIFT) | 1335 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1336 MID_TX_PLACE(tx->index)); 1337 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1338 MID_DESCR_START; 1339 } 1340 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1341 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1342 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1343 txtp->max_pcr < rate) error = -EINVAL; 1344 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1345 error = -EINVAL; 1346 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1347 error = -EINVAL; 1348 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1349 error = -EINVAL; 1350 if (error) { 1351 if (new_tx) { 1352 tx->send = NULL; 1353 eni_free_mem(eni_dev,mem,size); 1354 } 1355 return error; 1356 } 1357 txtp->pcr = rate; 1358 if (set_rsv && !ubr) { 1359 eni_dev->tx_bw += tx->reserved; 1360 tx->reserved = rate; 1361 eni_dev->tx_bw -= rate; 1362 } 1363 if (set_shp || (unlimited && new_tx)) { 1364 if (unlimited && new_tx) eni_dev->ubr = tx; 1365 tx->prescaler = pre; 1366 tx->resolution = res; 1367 tx->shaping = rate; 1368 } 1369 if (set_shp) eni_vcc->tx = tx; 1370 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1371 return 0; 1372} 1373 1374 1375static int open_tx_first(struct atm_vcc *vcc) 1376{ 1377 ENI_VCC(vcc)->tx = NULL; 1378 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1379 ENI_VCC(vcc)->txing = 0; 1380 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1381} 1382 1383 1384static int open_tx_second(struct atm_vcc *vcc) 1385{ 1386 return 0; /* nothing to do */ 1387} 1388 1389 1390static void close_tx(struct atm_vcc *vcc) 1391{ 1392 DECLARE_WAITQUEUE(wait,current); 1393 struct eni_dev *eni_dev; 1394 struct eni_vcc *eni_vcc; 1395 1396 eni_vcc = ENI_VCC(vcc); 1397 if (!eni_vcc->tx) return; 1398 eni_dev = ENI_DEV(vcc->dev); 1399 /* wait for TX queue to drain */ 1400 DPRINTK("eni_close: waiting for TX ...\n"); 1401 add_wait_queue(&eni_dev->tx_wait,&wait); 1402 set_current_state(TASK_UNINTERRUPTIBLE); 1403 for (;;) { 1404 int txing; 1405 1406 tasklet_disable(&eni_dev->task); 1407 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1408 tasklet_enable(&eni_dev->task); 1409 if (!txing) break; 1410 DPRINTK("%d TX left\n",eni_vcc->txing); 1411 schedule(); 1412 set_current_state(TASK_UNINTERRUPTIBLE); 1413 } 1414 set_current_state(TASK_RUNNING); 1415 remove_wait_queue(&eni_dev->tx_wait,&wait); 1416 if (eni_vcc->tx != eni_dev->ubr) { 1417 /* 1418 * Looping a few times in here is probably far cheaper than 1419 * keeping track of TX completions all the time, so let's poll 1420 * a bit ... 1421 */ 1422 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1423 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1424 schedule(); 1425 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1426 eni_vcc->tx->send = NULL; 1427 eni_dev->tx_bw += eni_vcc->tx->reserved; 1428 } 1429 eni_vcc->tx = NULL; 1430} 1431 1432 1433static int start_tx(struct atm_dev *dev) 1434{ 1435 struct eni_dev *eni_dev; 1436 int i; 1437 1438 eni_dev = ENI_DEV(dev); 1439 eni_dev->lost = 0; 1440 eni_dev->tx_bw = ATM_OC3_PCR; 1441 eni_dev->tx_mult = DEFAULT_TX_MULT; 1442 init_waitqueue_head(&eni_dev->tx_wait); 1443 eni_dev->ubr = NULL; 1444 skb_queue_head_init(&eni_dev->tx_queue); 1445 eni_out(0,MID_DMA_WR_TX); 1446 for (i = 0; i < NR_CHAN; i++) { 1447 eni_dev->tx[i].send = NULL; 1448 eni_dev->tx[i].index = i; 1449 } 1450 return 0; 1451} 1452 1453 1454/*--------------------------------- common ----------------------------------*/ 1455 1456 1457#if 0 /* may become useful again when tuning things */ 1458 1459static void foo(void) 1460{ 1461printk(KERN_INFO 1462 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1463 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1464 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1465 rx_enqueued,rx_dequeued,putting,pushed); 1466if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1467} 1468 1469#endif 1470 1471 1472static void bug_int(struct atm_dev *dev,unsigned long reason) 1473{ 1474 DPRINTK(">bug_int\n"); 1475 if (reason & MID_DMA_ERR_ACK) 1476 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1477 "error\n",dev->number); 1478 if (reason & MID_TX_IDENT_MISM) 1479 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1480 "mismatch\n",dev->number); 1481 if (reason & MID_TX_DMA_OVFL) 1482 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1483 "overflow\n",dev->number); 1484 EVENT("---dump ends here---\n",0,0); 1485 printk(KERN_NOTICE "---recent events---\n"); 1486 event_dump(); 1487} 1488 1489 1490static irqreturn_t eni_int(int irq,void *dev_id) 1491{ 1492 struct atm_dev *dev; 1493 struct eni_dev *eni_dev; 1494 u32 reason; 1495 1496 DPRINTK(">eni_int\n"); 1497 dev = dev_id; 1498 eni_dev = ENI_DEV(dev); 1499 reason = eni_in(MID_ISA); 1500 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1501 /* 1502 * Must handle these two right now, because reading ISA doesn't clear 1503 * them, so they re-occur and we never make it to the tasklet. Since 1504 * they're rare, we don't mind the occasional invocation of eni_tasklet 1505 * with eni_dev->events == 0. 1506 */ 1507 if (reason & MID_STAT_OVFL) { 1508 EVENT("stat overflow\n",0,0); 1509 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1510 } 1511 if (reason & MID_SUNI_INT) { 1512 EVENT("SUNI int\n",0,0); 1513 dev->phy->interrupt(dev); 1514#if 0 1515 foo(); 1516#endif 1517 } 1518 spin_lock(&eni_dev->lock); 1519 eni_dev->events |= reason; 1520 spin_unlock(&eni_dev->lock); 1521 tasklet_schedule(&eni_dev->task); 1522 return IRQ_HANDLED; 1523} 1524 1525 1526static void eni_tasklet(unsigned long data) 1527{ 1528 struct atm_dev *dev = (struct atm_dev *) data; 1529 struct eni_dev *eni_dev = ENI_DEV(dev); 1530 unsigned long flags; 1531 u32 events; 1532 1533 DPRINTK("eni_tasklet (dev %p)\n",dev); 1534 spin_lock_irqsave(&eni_dev->lock,flags); 1535 events = xchg(&eni_dev->events,0); 1536 spin_unlock_irqrestore(&eni_dev->lock,flags); 1537 if (events & MID_RX_DMA_COMPLETE) { 1538 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1539 dequeue_rx(dev); 1540 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1541 poll_rx(dev); 1542 EVENT("poll_rx done\n",0,0); 1543 /* poll_tx ? */ 1544 } 1545 if (events & MID_SERVICE) { 1546 EVENT("INT: service, starting get_service\n",0,0); 1547 get_service(dev); 1548 EVENT("get_service done, starting poll_rx\n",0,0); 1549 poll_rx(dev); 1550 EVENT("poll_rx done\n",0,0); 1551 } 1552 if (events & MID_TX_DMA_COMPLETE) { 1553 EVENT("INT: TX DMA COMPLETE\n",0,0); 1554 dequeue_tx(dev); 1555 } 1556 if (events & MID_TX_COMPLETE) { 1557 EVENT("INT: TX COMPLETE\n",0,0); 1558 tx_complete++; 1559 wake_up(&eni_dev->tx_wait); 1560 /* poll_rx ? */ 1561 } 1562 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1563 EVENT("bug interrupt\n",0,0); 1564 bug_int(dev,events); 1565 } 1566 poll_tx(dev); 1567} 1568 1569 1570/*--------------------------------- entries ---------------------------------*/ 1571 1572 1573static char * const media_name[] = { 1574 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1575 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1576 "TAXI","09?", "10?", "11?", /* 8-11 */ 1577 "12?", "13?", "14?", "15?", /* 12-15 */ 1578 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1579 "UTP", "21?", "22?", "23?", /* 20-23 */ 1580 "24?", "25?", "26?", "27?", /* 24-27 */ 1581 "28?", "29?", "30?", "31?" /* 28-31 */ 1582}; 1583 1584 1585#define SET_SEPROM \ 1586 ({ if (!error && !pci_error) { \ 1587 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1588 udelay(10); /* 10 usecs */ \ 1589 } }) 1590#define GET_SEPROM \ 1591 ({ if (!error && !pci_error) { \ 1592 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1593 udelay(10); /* 10 usecs */ \ 1594 } }) 1595 1596 1597static int get_esi_asic(struct atm_dev *dev) 1598{ 1599 struct eni_dev *eni_dev; 1600 unsigned char tonga; 1601 int error,failed,pci_error; 1602 int address,i,j; 1603 1604 eni_dev = ENI_DEV(dev); 1605 error = pci_error = 0; 1606 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1607 SET_SEPROM; 1608 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1609 /* start operation */ 1610 tonga |= SEPROM_DATA; 1611 SET_SEPROM; 1612 tonga |= SEPROM_CLK; 1613 SET_SEPROM; 1614 tonga &= ~SEPROM_DATA; 1615 SET_SEPROM; 1616 tonga &= ~SEPROM_CLK; 1617 SET_SEPROM; 1618 /* send address */ 1619 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1620 for (j = 7; j >= 0; j--) { 1621 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1622 tonga & ~SEPROM_DATA; 1623 SET_SEPROM; 1624 tonga |= SEPROM_CLK; 1625 SET_SEPROM; 1626 tonga &= ~SEPROM_CLK; 1627 SET_SEPROM; 1628 } 1629 /* get ack */ 1630 tonga |= SEPROM_DATA; 1631 SET_SEPROM; 1632 tonga |= SEPROM_CLK; 1633 SET_SEPROM; 1634 GET_SEPROM; 1635 failed = tonga & SEPROM_DATA; 1636 tonga &= ~SEPROM_CLK; 1637 SET_SEPROM; 1638 tonga |= SEPROM_DATA; 1639 SET_SEPROM; 1640 if (failed) error = -EIO; 1641 else { 1642 dev->esi[i] = 0; 1643 for (j = 7; j >= 0; j--) { 1644 dev->esi[i] <<= 1; 1645 tonga |= SEPROM_DATA; 1646 SET_SEPROM; 1647 tonga |= SEPROM_CLK; 1648 SET_SEPROM; 1649 GET_SEPROM; 1650 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1651 tonga &= ~SEPROM_CLK; 1652 SET_SEPROM; 1653 tonga |= SEPROM_DATA; 1654 SET_SEPROM; 1655 } 1656 /* get ack */ 1657 tonga |= SEPROM_DATA; 1658 SET_SEPROM; 1659 tonga |= SEPROM_CLK; 1660 SET_SEPROM; 1661 GET_SEPROM; 1662 if (!(tonga & SEPROM_DATA)) error = -EIO; 1663 tonga &= ~SEPROM_CLK; 1664 SET_SEPROM; 1665 tonga |= SEPROM_DATA; 1666 SET_SEPROM; 1667 } 1668 /* stop operation */ 1669 tonga &= ~SEPROM_DATA; 1670 SET_SEPROM; 1671 tonga |= SEPROM_CLK; 1672 SET_SEPROM; 1673 tonga |= SEPROM_DATA; 1674 SET_SEPROM; 1675 } 1676 if (pci_error) { 1677 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1678 "(0x%02x)\n",dev->number,pci_error); 1679 error = -EIO; 1680 } 1681 return error; 1682} 1683 1684 1685#undef SET_SEPROM 1686#undef GET_SEPROM 1687 1688 1689static int get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1690{ 1691 void __iomem *mac_base; 1692 int i; 1693 1694 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1695 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1696 return 0; 1697} 1698 1699 1700static int eni_do_init(struct atm_dev *dev) 1701{ 1702 struct midway_eprom __iomem *eprom; 1703 struct eni_dev *eni_dev; 1704 struct pci_dev *pci_dev; 1705 unsigned long real_base; 1706 void __iomem *base; 1707 int error,i,last; 1708 1709 DPRINTK(">eni_init\n"); 1710 dev->ci_range.vpi_bits = 0; 1711 dev->ci_range.vci_bits = NR_VCI_LD; 1712 dev->link_rate = ATM_OC3_PCR; 1713 eni_dev = ENI_DEV(dev); 1714 pci_dev = eni_dev->pci_dev; 1715 real_base = pci_resource_start(pci_dev, 0); 1716 eni_dev->irq = pci_dev->irq; 1717 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1718 PCI_COMMAND_MEMORY | 1719 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1720 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1721 "(0x%02x)\n",dev->number,error); 1722 return -EIO; 1723 } 1724 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1725 dev->number,pci_dev->revision,real_base,eni_dev->irq); 1726 if (!(base = ioremap(real_base,MAP_MAX_SIZE))) { 1727 printk("\n"); 1728 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1729 "mapping\n",dev->number); 1730 return -ENOMEM; 1731 } 1732 eni_dev->ioaddr = base; 1733 eni_dev->base_diff = real_base - (unsigned long) base; 1734 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1735 if (!eni_dev->asic) { 1736 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1737 if (readl(&eprom->magic) != ENI155_MAGIC) { 1738 printk("\n"); 1739 printk(KERN_ERR DEV_LABEL 1740 "(itf %d): bad magic - expected 0x%x, got 0x%x\n", 1741 dev->number, ENI155_MAGIC, 1742 (unsigned)readl(&eprom->magic)); 1743 error = -EINVAL; 1744 goto unmap; 1745 } 1746 } 1747 eni_dev->phy = base+PHY_BASE; 1748 eni_dev->reg = base+REG_BASE; 1749 eni_dev->ram = base+RAM_BASE; 1750 last = MAP_MAX_SIZE-RAM_BASE; 1751 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1752 writel(0x55555555,eni_dev->ram+i); 1753 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1754 else { 1755 writel(0xAAAAAAAA,eni_dev->ram+i); 1756 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1757 else writel(i,eni_dev->ram+i); 1758 } 1759 } 1760 for (i = 0; i < last; i += RAM_INCREMENT) 1761 if (readl(eni_dev->ram+i) != i) break; 1762 eni_dev->mem = i; 1763 memset_io(eni_dev->ram,0,eni_dev->mem); 1764 /* TODO: should shrink allocation now */ 1765 printk("mem=%dkB (",eni_dev->mem >> 10); 1766 /* TODO: check for non-SUNI, check for TAXI ? */ 1767 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1768 printk(")\n"); 1769 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1770 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1771 error = -EINVAL; 1772 goto unmap; 1773 } 1774 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1775 if (error) 1776 goto unmap; 1777 for (i = 0; i < ESI_LEN; i++) 1778 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1779 printk(")\n"); 1780 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1781 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1782 media_name[eni_in(MID_RES_ID_MCON) & DAUGHTER_ID]); 1783 1784 error = suni_init(dev); 1785 if (error) 1786 goto unmap; 1787out: 1788 return error; 1789unmap: 1790 iounmap(base); 1791 goto out; 1792} 1793 1794static void eni_do_release(struct atm_dev *dev) 1795{ 1796 struct eni_dev *ed = ENI_DEV(dev); 1797 1798 dev->phy->stop(dev); 1799 dev->phy = NULL; 1800 iounmap(ed->ioaddr); 1801} 1802 1803static int eni_start(struct atm_dev *dev) 1804{ 1805 struct eni_dev *eni_dev; 1806 1807 void __iomem *buf; 1808 unsigned long buffer_mem; 1809 int error; 1810 1811 DPRINTK(">eni_start\n"); 1812 eni_dev = ENI_DEV(dev); 1813 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { 1814 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1815 dev->number,eni_dev->irq); 1816 error = -EAGAIN; 1817 goto out; 1818 } 1819 pci_set_master(eni_dev->pci_dev); 1820 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1821 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1822 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1823 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1824 "master (0x%02x)\n",dev->number,error); 1825 goto free_irq; 1826 } 1827 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1828 END_SWAP_DMA))) { 1829 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1830 "(0x%02x)\n",dev->number,error); 1831 goto free_irq; 1832 } 1833 /* determine addresses of internal tables */ 1834 eni_dev->vci = eni_dev->ram; 1835 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1836 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1837 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1838 buf = eni_dev->service+NR_SERVICE*4; 1839 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1840 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1841 eni_dev->service,buf); 1842 spin_lock_init(&eni_dev->lock); 1843 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1844 eni_dev->events = 0; 1845 /* initialize memory management */ 1846 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1847 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1848 eni_dev->free_list = kmalloc_array(eni_dev->free_list_size + 1, 1849 sizeof(*eni_dev->free_list), 1850 GFP_KERNEL); 1851 if (!eni_dev->free_list) { 1852 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1853 dev->number); 1854 error = -ENOMEM; 1855 goto free_irq; 1856 } 1857 eni_dev->free_len = 0; 1858 eni_put_free(eni_dev,buf,buffer_mem); 1859 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1860 /* 1861 * byte_addr free (k) 1862 * 0x00000000 512 VCI table 1863 * 0x00004000 496 RX DMA 1864 * 0x00005000 492 TX DMA 1865 * 0x00006000 488 service list 1866 * 0x00007000 484 buffers 1867 * 0x00080000 0 end (512kB) 1868 */ 1869 eni_out(0xffffffff,MID_IE); 1870 error = start_tx(dev); 1871 if (error) goto free_list; 1872 error = start_rx(dev); 1873 if (error) goto free_list; 1874 error = dev->phy->start(dev); 1875 if (error) goto free_list; 1876 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1877 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1878 MID_MC_S); 1879 /* Tonga uses SBus INTReq1 */ 1880 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1881 return 0; 1882 1883free_list: 1884 kfree(eni_dev->free_list); 1885 1886free_irq: 1887 free_irq(eni_dev->irq, dev); 1888 1889out: 1890 return error; 1891} 1892 1893 1894static void eni_close(struct atm_vcc *vcc) 1895{ 1896 DPRINTK(">eni_close\n"); 1897 if (!ENI_VCC(vcc)) return; 1898 clear_bit(ATM_VF_READY,&vcc->flags); 1899 close_rx(vcc); 1900 close_tx(vcc); 1901 DPRINTK("eni_close: done waiting\n"); 1902 /* deallocate memory */ 1903 kfree(ENI_VCC(vcc)); 1904 vcc->dev_data = NULL; 1905 clear_bit(ATM_VF_ADDR,&vcc->flags); 1906 /*foo();*/ 1907} 1908 1909 1910static int eni_open(struct atm_vcc *vcc) 1911{ 1912 struct eni_vcc *eni_vcc; 1913 int error; 1914 short vpi = vcc->vpi; 1915 int vci = vcc->vci; 1916 1917 DPRINTK(">eni_open\n"); 1918 EVENT("eni_open\n",0,0); 1919 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1920 vcc->dev_data = NULL; 1921 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1922 set_bit(ATM_VF_ADDR,&vcc->flags); 1923 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1924 return -EINVAL; 1925 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1926 vcc->vci); 1927 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1928 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1929 if (!eni_vcc) return -ENOMEM; 1930 vcc->dev_data = eni_vcc; 1931 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1932 if ((error = open_rx_first(vcc))) { 1933 eni_close(vcc); 1934 return error; 1935 } 1936 if ((error = open_tx_first(vcc))) { 1937 eni_close(vcc); 1938 return error; 1939 } 1940 } 1941 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1942 if ((error = open_rx_second(vcc))) { 1943 eni_close(vcc); 1944 return error; 1945 } 1946 if ((error = open_tx_second(vcc))) { 1947 eni_close(vcc); 1948 return error; 1949 } 1950 set_bit(ATM_VF_READY,&vcc->flags); 1951 /* should power down SUNI while !ref_count @@@ */ 1952 return 0; 1953} 1954 1955 1956static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1957{ 1958 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1959 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1960 struct sk_buff *skb; 1961 int error,rate,rsv,shp; 1962 1963 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1964 if (tx == eni_dev->ubr) return -EBADFD; 1965 rate = atm_pcr_goal(&qos->txtp); 1966 if (rate < 0) rate = -rate; 1967 rsv = shp = 0; 1968 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1969 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1970 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1971 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1972 if (!rsv && !shp) return 0; 1973 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1974 if (error) return error; 1975 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1976 /* 1977 * Walk through the send buffer and patch the rate information in all 1978 * segmentation buffer descriptors of this VCC. 1979 */ 1980 tasklet_disable(&eni_dev->task); 1981 skb_queue_walk(&eni_dev->tx_queue, skb) { 1982 void __iomem *dsc; 1983 1984 if (ATM_SKB(skb)->vcc != vcc) continue; 1985 dsc = tx->send+ENI_PRV_POS(skb)*4; 1986 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1987 (tx->prescaler << MID_SEG_PR_SHIFT) | 1988 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1989 } 1990 tasklet_enable(&eni_dev->task); 1991 return 0; 1992} 1993 1994 1995static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1996{ 1997 struct eni_dev *eni_dev = ENI_DEV(dev); 1998 1999 if (cmd == ENI_MEMDUMP) { 2000 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2001 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 2002 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 2003 dump(dev); 2004 return 0; 2005 } 2006 if (cmd == ENI_SETMULT) { 2007 struct eni_multipliers mult; 2008 2009 if (!capable(CAP_NET_ADMIN)) return -EPERM; 2010 if (copy_from_user(&mult, arg, 2011 sizeof(struct eni_multipliers))) 2012 return -EFAULT; 2013 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2014 mult.tx > 65536 || mult.rx > 65536) 2015 return -EINVAL; 2016 if (mult.tx) eni_dev->tx_mult = mult.tx; 2017 if (mult.rx) eni_dev->rx_mult = mult.rx; 2018 return 0; 2019 } 2020 if (cmd == ATM_SETCIRANGE) { 2021 struct atm_cirange ci; 2022 2023 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2024 return -EFAULT; 2025 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2026 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2027 return 0; 2028 return -EINVAL; 2029 } 2030 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2031 return dev->phy->ioctl(dev,cmd,arg); 2032} 2033 2034static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2035{ 2036 enum enq_res res; 2037 2038 DPRINTK(">eni_send\n"); 2039 if (!ENI_VCC(vcc)->tx) { 2040 if (vcc->pop) vcc->pop(vcc,skb); 2041 else dev_kfree_skb(skb); 2042 return -EINVAL; 2043 } 2044 if (!skb) { 2045 printk(KERN_CRIT "!skb in eni_send ?\n"); 2046 if (vcc->pop) vcc->pop(vcc,skb); 2047 return -EINVAL; 2048 } 2049 if (vcc->qos.aal == ATM_AAL0) { 2050 if (skb->len != ATM_CELL_SIZE-1) { 2051 if (vcc->pop) vcc->pop(vcc,skb); 2052 else dev_kfree_skb(skb); 2053 return -EINVAL; 2054 } 2055 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2056 } 2057 submitted++; 2058 ATM_SKB(skb)->vcc = vcc; 2059 tasklet_disable_in_atomic(&ENI_DEV(vcc->dev)->task); 2060 res = do_tx(skb); 2061 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2062 if (res == enq_ok) return 0; 2063 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2064 backlogged++; 2065 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2066 return 0; 2067} 2068 2069static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2070 unsigned long addr) 2071{ 2072 writel(value,ENI_DEV(dev)->phy+addr*4); 2073} 2074 2075 2076 2077static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2078{ 2079 return readl(ENI_DEV(dev)->phy+addr*4); 2080} 2081 2082 2083static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2084{ 2085 struct sock *s; 2086 static const char *signal[] = { "LOST","unknown","okay" }; 2087 struct eni_dev *eni_dev = ENI_DEV(dev); 2088 struct atm_vcc *vcc; 2089 int left,i; 2090 2091 left = *pos; 2092 if (!left) 2093 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2094 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2095 eni_dev->mem >> 10,eni_dev->tx_bw); 2096 if (!--left) 2097 return sprintf(page,"%4sBursts: TX" 2098#if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2099 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2100 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2101 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2102 " none" 2103#endif 2104#ifdef CONFIG_ATM_ENI_BURST_TX_16W 2105 " 16W" 2106#endif 2107#ifdef CONFIG_ATM_ENI_BURST_TX_8W 2108 " 8W" 2109#endif 2110#ifdef CONFIG_ATM_ENI_BURST_TX_4W 2111 " 4W" 2112#endif 2113#ifdef CONFIG_ATM_ENI_BURST_TX_2W 2114 " 2W" 2115#endif 2116 ", RX" 2117#if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2118 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2119 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2120 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2121 " none" 2122#endif 2123#ifdef CONFIG_ATM_ENI_BURST_RX_16W 2124 " 16W" 2125#endif 2126#ifdef CONFIG_ATM_ENI_BURST_RX_8W 2127 " 8W" 2128#endif 2129#ifdef CONFIG_ATM_ENI_BURST_RX_4W 2130 " 4W" 2131#endif 2132#ifdef CONFIG_ATM_ENI_BURST_RX_2W 2133 " 2W" 2134#endif 2135#ifndef CONFIG_ATM_ENI_TUNE_BURST 2136 " (default)" 2137#endif 2138 "\n",""); 2139 if (!--left) 2140 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2141 "",eni_dev->tx_mult,eni_dev->rx_mult); 2142 for (i = 0; i < NR_CHAN; i++) { 2143 struct eni_tx *tx = eni_dev->tx+i; 2144 2145 if (!tx->send) continue; 2146 if (!--left) { 2147 return sprintf(page, "tx[%d]: 0x%lx-0x%lx " 2148 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2149 (unsigned long) (tx->send - eni_dev->ram), 2150 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2151 tx->reserved,tx->shaping, 2152 tx == eni_dev->ubr ? " (UBR)" : ""); 2153 } 2154 if (--left) continue; 2155 return sprintf(page,"%10sbacklog %u packets\n","", 2156 skb_queue_len(&tx->backlog)); 2157 } 2158 read_lock(&vcc_sklist_lock); 2159 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2160 struct hlist_head *head = &vcc_hash[i]; 2161 2162 sk_for_each(s, head) { 2163 struct eni_vcc *eni_vcc; 2164 int length; 2165 2166 vcc = atm_sk(s); 2167 if (vcc->dev != dev) 2168 continue; 2169 eni_vcc = ENI_VCC(vcc); 2170 if (--left) continue; 2171 length = sprintf(page,"vcc %4d: ",vcc->vci); 2172 if (eni_vcc->rx) { 2173 length += sprintf(page+length, "0x%lx-0x%lx " 2174 "(%6ld bytes)", 2175 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2176 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2177 eni_vcc->words*4); 2178 if (eni_vcc->tx) length += sprintf(page+length,", "); 2179 } 2180 if (eni_vcc->tx) 2181 length += sprintf(page+length,"tx[%d], txing %d bytes", 2182 eni_vcc->tx->index,eni_vcc->txing); 2183 page[length] = '\n'; 2184 read_unlock(&vcc_sklist_lock); 2185 return length+1; 2186 } 2187 } 2188 read_unlock(&vcc_sklist_lock); 2189 for (i = 0; i < eni_dev->free_len; i++) { 2190 struct eni_free *fe = eni_dev->free_list+i; 2191 unsigned long offset; 2192 2193 if (--left) continue; 2194 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2195 return sprintf(page,"free %p-%p (%6d bytes)\n", 2196 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2197 1 << fe->order); 2198 } 2199 return 0; 2200} 2201 2202 2203static const struct atmdev_ops ops = { 2204 .open = eni_open, 2205 .close = eni_close, 2206 .ioctl = eni_ioctl, 2207 .send = eni_send, 2208 .phy_put = eni_phy_put, 2209 .phy_get = eni_phy_get, 2210 .change_qos = eni_change_qos, 2211 .proc_read = eni_proc_read 2212}; 2213 2214 2215static int eni_init_one(struct pci_dev *pci_dev, 2216 const struct pci_device_id *ent) 2217{ 2218 struct atm_dev *dev; 2219 struct eni_dev *eni_dev; 2220 struct eni_zero *zero; 2221 int rc; 2222 2223 rc = pci_enable_device(pci_dev); 2224 if (rc < 0) 2225 goto out; 2226 2227 rc = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(32)); 2228 if (rc < 0) 2229 goto err_disable; 2230 2231 rc = -ENOMEM; 2232 eni_dev = kmalloc(sizeof(struct eni_dev), GFP_KERNEL); 2233 if (!eni_dev) 2234 goto err_disable; 2235 2236 zero = &eni_dev->zero; 2237 zero->addr = dma_alloc_coherent(&pci_dev->dev, 2238 ENI_ZEROES_SIZE, &zero->dma, GFP_KERNEL); 2239 if (!zero->addr) 2240 goto err_kfree; 2241 2242 dev = atm_dev_register(DEV_LABEL, &pci_dev->dev, &ops, -1, NULL); 2243 if (!dev) 2244 goto err_free_consistent; 2245 2246 dev->dev_data = eni_dev; 2247 pci_set_drvdata(pci_dev, dev); 2248 eni_dev->pci_dev = pci_dev; 2249 eni_dev->asic = ent->driver_data; 2250 2251 rc = eni_do_init(dev); 2252 if (rc < 0) 2253 goto err_unregister; 2254 2255 rc = eni_start(dev); 2256 if (rc < 0) 2257 goto err_eni_release; 2258 2259 eni_dev->more = eni_boards; 2260 eni_boards = dev; 2261out: 2262 return rc; 2263 2264err_eni_release: 2265 dev->phy = NULL; 2266 iounmap(ENI_DEV(dev)->ioaddr); 2267err_unregister: 2268 atm_dev_deregister(dev); 2269err_free_consistent: 2270 dma_free_coherent(&pci_dev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2271err_kfree: 2272 kfree(eni_dev); 2273err_disable: 2274 pci_disable_device(pci_dev); 2275 goto out; 2276} 2277 2278 2279static const struct pci_device_id eni_pci_tbl[] = { 2280 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_FPGA), 0 /* FPGA */ }, 2281 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_ASIC), 1 /* ASIC */ }, 2282 { 0, } 2283}; 2284MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2285 2286 2287static void eni_remove_one(struct pci_dev *pdev) 2288{ 2289 struct atm_dev *dev = pci_get_drvdata(pdev); 2290 struct eni_dev *ed = ENI_DEV(dev); 2291 struct eni_zero *zero = &ed->zero; 2292 2293 eni_do_release(dev); 2294 atm_dev_deregister(dev); 2295 dma_free_coherent(&pdev->dev, ENI_ZEROES_SIZE, zero->addr, zero->dma); 2296 kfree(ed); 2297 pci_disable_device(pdev); 2298} 2299 2300 2301static struct pci_driver eni_driver = { 2302 .name = DEV_LABEL, 2303 .id_table = eni_pci_tbl, 2304 .probe = eni_init_one, 2305 .remove = eni_remove_one, 2306}; 2307 2308 2309static int __init eni_init(void) 2310{ 2311 struct sk_buff *skb; /* dummy for sizeof */ 2312 2313 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct eni_skb_prv)); 2314 return pci_register_driver(&eni_driver); 2315} 2316 2317 2318module_init(eni_init); 2319/* @@@ since exit routine not defined, this module can not be unloaded */ 2320 2321MODULE_DESCRIPTION("Efficient Networks ENI155P ATM NIC driver"); 2322MODULE_LICENSE("GPL"); 2323