1 /******************************************************************* 2 * 3 * Copyright (c) 2000 ATecoM GmbH 4 * 5 * The author may be reached at ecd@atecom.com. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 13 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 15 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 16 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 17 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 18 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 19 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 22 * 23 * You should have received a copy of the GNU General Public License along 24 * with this program; if not, write to the Free Software Foundation, Inc., 25 * 675 Mass Ave, Cambridge, MA 02139, USA. 26 * 27 *******************************************************************/ 28 29 #include <linux/module.h> 30 #include <linux/pci.h> 31 #include <linux/poison.h> 32 #include <linux/skbuff.h> 33 #include <linux/kernel.h> 34 #include <linux/vmalloc.h> 35 #include <linux/netdevice.h> 36 #include <linux/atmdev.h> 37 #include <linux/atm.h> 38 #include <linux/delay.h> 39 #include <linux/init.h> 40 #include <linux/bitops.h> 41 #include <linux/wait.h> 42 #include <linux/jiffies.h> 43 #include <linux/mutex.h> 44 #include <linux/slab.h> 45 46 #include <asm/io.h> 47 #include <asm/uaccess.h> 48 #include <asm/atomic.h> 49 #include <asm/byteorder.h> 50 51 #ifdef CONFIG_ATM_IDT77252_USE_SUNI 52 #include "suni.h" 53 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */ 54 55 56 #include "idt77252.h" 57 #include "idt77252_tables.h" 58 59 static unsigned int vpibits = 1; 60 61 62 #define ATM_IDT77252_SEND_IDLE 1 63 64 65 /* 66 * Debug HACKs. 67 */ 68 #define DEBUG_MODULE 1 69 #undef HAVE_EEPROM /* does not work, yet. */ 70 71 #ifdef CONFIG_ATM_IDT77252_DEBUG 72 static unsigned long debug = DBG_GENERAL; 73 #endif 74 75 76 #define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY) 77 78 79 /* 80 * SCQ Handling. 81 */ 82 static struct scq_info *alloc_scq(struct idt77252_dev *, int); 83 static void free_scq(struct idt77252_dev *, struct scq_info *); 84 static int queue_skb(struct idt77252_dev *, struct vc_map *, 85 struct sk_buff *, int oam); 86 static void drain_scq(struct idt77252_dev *, struct vc_map *); 87 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *); 88 static void fill_scd(struct idt77252_dev *, struct scq_info *, int); 89 90 /* 91 * FBQ Handling. 92 */ 93 static int push_rx_skb(struct idt77252_dev *, 94 struct sk_buff *, int queue); 95 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *); 96 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *); 97 static void recycle_rx_pool_skb(struct idt77252_dev *, 98 struct rx_pool *); 99 static void add_rx_skb(struct idt77252_dev *, int queue, 100 unsigned int size, unsigned int count); 101 102 /* 103 * RSQ Handling. 104 */ 105 static int init_rsq(struct idt77252_dev *); 106 static void deinit_rsq(struct idt77252_dev *); 107 static void idt77252_rx(struct idt77252_dev *); 108 109 /* 110 * TSQ handling. 111 */ 112 static int init_tsq(struct idt77252_dev *); 113 static void deinit_tsq(struct idt77252_dev *); 114 static void idt77252_tx(struct idt77252_dev *); 115 116 117 /* 118 * ATM Interface. 119 */ 120 static void idt77252_dev_close(struct atm_dev *dev); 121 static int idt77252_open(struct atm_vcc *vcc); 122 static void idt77252_close(struct atm_vcc *vcc); 123 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb); 124 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell, 125 int flags); 126 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value, 127 unsigned long addr); 128 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr); 129 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, 130 int flags); 131 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos, 132 char *page); 133 static void idt77252_softint(struct work_struct *work); 134 135 136 static struct atmdev_ops idt77252_ops = 137 { 138 .dev_close = idt77252_dev_close, 139 .open = idt77252_open, 140 .close = idt77252_close, 141 .send = idt77252_send, 142 .send_oam = idt77252_send_oam, 143 .phy_put = idt77252_phy_put, 144 .phy_get = idt77252_phy_get, 145 .change_qos = idt77252_change_qos, 146 .proc_read = idt77252_proc_read, 147 .owner = THIS_MODULE 148 }; 149 150 static struct idt77252_dev *idt77252_chain = NULL; 151 static unsigned int idt77252_sram_write_errors = 0; 152 153 /*****************************************************************************/ 154 /* */ 155 /* I/O and Utility Bus */ 156 /* */ 157 /*****************************************************************************/ 158 159 static void 160 waitfor_idle(struct idt77252_dev *card) 161 { 162 u32 stat; 163 164 stat = readl(SAR_REG_STAT); 165 while (stat & SAR_STAT_CMDBZ) 166 stat = readl(SAR_REG_STAT); 167 } 168 169 static u32 170 read_sram(struct idt77252_dev *card, unsigned long addr) 171 { 172 unsigned long flags; 173 u32 value; 174 175 spin_lock_irqsave(&card->cmd_lock, flags); 176 writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD); 177 waitfor_idle(card); 178 value = readl(SAR_REG_DR0); 179 spin_unlock_irqrestore(&card->cmd_lock, flags); 180 return value; 181 } 182 183 static void 184 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value) 185 { 186 unsigned long flags; 187 188 if ((idt77252_sram_write_errors == 0) && 189 (((addr > card->tst[0] + card->tst_size - 2) && 190 (addr < card->tst[0] + card->tst_size)) || 191 ((addr > card->tst[1] + card->tst_size - 2) && 192 (addr < card->tst[1] + card->tst_size)))) { 193 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n", 194 card->name, addr, value); 195 } 196 197 spin_lock_irqsave(&card->cmd_lock, flags); 198 writel(value, SAR_REG_DR0); 199 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD); 200 waitfor_idle(card); 201 spin_unlock_irqrestore(&card->cmd_lock, flags); 202 } 203 204 static u8 205 read_utility(void *dev, unsigned long ubus_addr) 206 { 207 struct idt77252_dev *card = dev; 208 unsigned long flags; 209 u8 value; 210 211 if (!card) { 212 printk("Error: No such device.\n"); 213 return -1; 214 } 215 216 spin_lock_irqsave(&card->cmd_lock, flags); 217 writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD); 218 waitfor_idle(card); 219 value = readl(SAR_REG_DR0); 220 spin_unlock_irqrestore(&card->cmd_lock, flags); 221 return value; 222 } 223 224 static void 225 write_utility(void *dev, unsigned long ubus_addr, u8 value) 226 { 227 struct idt77252_dev *card = dev; 228 unsigned long flags; 229 230 if (!card) { 231 printk("Error: No such device.\n"); 232 return; 233 } 234 235 spin_lock_irqsave(&card->cmd_lock, flags); 236 writel((u32) value, SAR_REG_DR0); 237 writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD); 238 waitfor_idle(card); 239 spin_unlock_irqrestore(&card->cmd_lock, flags); 240 } 241 242 #ifdef HAVE_EEPROM 243 static u32 rdsrtab[] = 244 { 245 SAR_GP_EECS | SAR_GP_EESCLK, 246 0, 247 SAR_GP_EESCLK, /* 0 */ 248 0, 249 SAR_GP_EESCLK, /* 0 */ 250 0, 251 SAR_GP_EESCLK, /* 0 */ 252 0, 253 SAR_GP_EESCLK, /* 0 */ 254 0, 255 SAR_GP_EESCLK, /* 0 */ 256 SAR_GP_EEDO, 257 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 258 0, 259 SAR_GP_EESCLK, /* 0 */ 260 SAR_GP_EEDO, 261 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */ 262 }; 263 264 static u32 wrentab[] = 265 { 266 SAR_GP_EECS | SAR_GP_EESCLK, 267 0, 268 SAR_GP_EESCLK, /* 0 */ 269 0, 270 SAR_GP_EESCLK, /* 0 */ 271 0, 272 SAR_GP_EESCLK, /* 0 */ 273 0, 274 SAR_GP_EESCLK, /* 0 */ 275 SAR_GP_EEDO, 276 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 277 SAR_GP_EEDO, 278 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 279 0, 280 SAR_GP_EESCLK, /* 0 */ 281 0, 282 SAR_GP_EESCLK /* 0 */ 283 }; 284 285 static u32 rdtab[] = 286 { 287 SAR_GP_EECS | SAR_GP_EESCLK, 288 0, 289 SAR_GP_EESCLK, /* 0 */ 290 0, 291 SAR_GP_EESCLK, /* 0 */ 292 0, 293 SAR_GP_EESCLK, /* 0 */ 294 0, 295 SAR_GP_EESCLK, /* 0 */ 296 0, 297 SAR_GP_EESCLK, /* 0 */ 298 0, 299 SAR_GP_EESCLK, /* 0 */ 300 SAR_GP_EEDO, 301 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 302 SAR_GP_EEDO, 303 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */ 304 }; 305 306 static u32 wrtab[] = 307 { 308 SAR_GP_EECS | SAR_GP_EESCLK, 309 0, 310 SAR_GP_EESCLK, /* 0 */ 311 0, 312 SAR_GP_EESCLK, /* 0 */ 313 0, 314 SAR_GP_EESCLK, /* 0 */ 315 0, 316 SAR_GP_EESCLK, /* 0 */ 317 0, 318 SAR_GP_EESCLK, /* 0 */ 319 0, 320 SAR_GP_EESCLK, /* 0 */ 321 SAR_GP_EEDO, 322 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 323 0, 324 SAR_GP_EESCLK /* 0 */ 325 }; 326 327 static u32 clktab[] = 328 { 329 0, 330 SAR_GP_EESCLK, 331 0, 332 SAR_GP_EESCLK, 333 0, 334 SAR_GP_EESCLK, 335 0, 336 SAR_GP_EESCLK, 337 0, 338 SAR_GP_EESCLK, 339 0, 340 SAR_GP_EESCLK, 341 0, 342 SAR_GP_EESCLK, 343 0, 344 SAR_GP_EESCLK, 345 0 346 }; 347 348 static u32 349 idt77252_read_gp(struct idt77252_dev *card) 350 { 351 u32 gp; 352 353 gp = readl(SAR_REG_GP); 354 #if 0 355 printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0"); 356 #endif 357 return gp; 358 } 359 360 static void 361 idt77252_write_gp(struct idt77252_dev *card, u32 value) 362 { 363 unsigned long flags; 364 365 #if 0 366 printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS", 367 value & SAR_GP_EESCLK ? "HIGH" : "LOW ", 368 value & SAR_GP_EEDO ? "1" : "0"); 369 #endif 370 371 spin_lock_irqsave(&card->cmd_lock, flags); 372 waitfor_idle(card); 373 writel(value, SAR_REG_GP); 374 spin_unlock_irqrestore(&card->cmd_lock, flags); 375 } 376 377 static u8 378 idt77252_eeprom_read_status(struct idt77252_dev *card) 379 { 380 u8 byte; 381 u32 gp; 382 int i, j; 383 384 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO); 385 386 for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) { 387 idt77252_write_gp(card, gp | rdsrtab[i]); 388 udelay(5); 389 } 390 idt77252_write_gp(card, gp | SAR_GP_EECS); 391 udelay(5); 392 393 byte = 0; 394 for (i = 0, j = 0; i < 8; i++) { 395 byte <<= 1; 396 397 idt77252_write_gp(card, gp | clktab[j++]); 398 udelay(5); 399 400 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0; 401 402 idt77252_write_gp(card, gp | clktab[j++]); 403 udelay(5); 404 } 405 idt77252_write_gp(card, gp | SAR_GP_EECS); 406 udelay(5); 407 408 return byte; 409 } 410 411 static u8 412 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset) 413 { 414 u8 byte; 415 u32 gp; 416 int i, j; 417 418 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO); 419 420 for (i = 0; i < ARRAY_SIZE(rdtab); i++) { 421 idt77252_write_gp(card, gp | rdtab[i]); 422 udelay(5); 423 } 424 idt77252_write_gp(card, gp | SAR_GP_EECS); 425 udelay(5); 426 427 for (i = 0, j = 0; i < 8; i++) { 428 idt77252_write_gp(card, gp | clktab[j++] | 429 (offset & 1 ? SAR_GP_EEDO : 0)); 430 udelay(5); 431 432 idt77252_write_gp(card, gp | clktab[j++] | 433 (offset & 1 ? SAR_GP_EEDO : 0)); 434 udelay(5); 435 436 offset >>= 1; 437 } 438 idt77252_write_gp(card, gp | SAR_GP_EECS); 439 udelay(5); 440 441 byte = 0; 442 for (i = 0, j = 0; i < 8; i++) { 443 byte <<= 1; 444 445 idt77252_write_gp(card, gp | clktab[j++]); 446 udelay(5); 447 448 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0; 449 450 idt77252_write_gp(card, gp | clktab[j++]); 451 udelay(5); 452 } 453 idt77252_write_gp(card, gp | SAR_GP_EECS); 454 udelay(5); 455 456 return byte; 457 } 458 459 static void 460 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data) 461 { 462 u32 gp; 463 int i, j; 464 465 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO); 466 467 for (i = 0; i < ARRAY_SIZE(wrentab); i++) { 468 idt77252_write_gp(card, gp | wrentab[i]); 469 udelay(5); 470 } 471 idt77252_write_gp(card, gp | SAR_GP_EECS); 472 udelay(5); 473 474 for (i = 0; i < ARRAY_SIZE(wrtab); i++) { 475 idt77252_write_gp(card, gp | wrtab[i]); 476 udelay(5); 477 } 478 idt77252_write_gp(card, gp | SAR_GP_EECS); 479 udelay(5); 480 481 for (i = 0, j = 0; i < 8; i++) { 482 idt77252_write_gp(card, gp | clktab[j++] | 483 (offset & 1 ? SAR_GP_EEDO : 0)); 484 udelay(5); 485 486 idt77252_write_gp(card, gp | clktab[j++] | 487 (offset & 1 ? SAR_GP_EEDO : 0)); 488 udelay(5); 489 490 offset >>= 1; 491 } 492 idt77252_write_gp(card, gp | SAR_GP_EECS); 493 udelay(5); 494 495 for (i = 0, j = 0; i < 8; i++) { 496 idt77252_write_gp(card, gp | clktab[j++] | 497 (data & 1 ? SAR_GP_EEDO : 0)); 498 udelay(5); 499 500 idt77252_write_gp(card, gp | clktab[j++] | 501 (data & 1 ? SAR_GP_EEDO : 0)); 502 udelay(5); 503 504 data >>= 1; 505 } 506 idt77252_write_gp(card, gp | SAR_GP_EECS); 507 udelay(5); 508 } 509 510 static void 511 idt77252_eeprom_init(struct idt77252_dev *card) 512 { 513 u32 gp; 514 515 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO); 516 517 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK); 518 udelay(5); 519 idt77252_write_gp(card, gp | SAR_GP_EECS); 520 udelay(5); 521 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK); 522 udelay(5); 523 idt77252_write_gp(card, gp | SAR_GP_EECS); 524 udelay(5); 525 } 526 #endif /* HAVE_EEPROM */ 527 528 529 #ifdef CONFIG_ATM_IDT77252_DEBUG 530 static void 531 dump_tct(struct idt77252_dev *card, int index) 532 { 533 unsigned long tct; 534 int i; 535 536 tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE); 537 538 printk("%s: TCT %x:", card->name, index); 539 for (i = 0; i < 8; i++) { 540 printk(" %08x", read_sram(card, tct + i)); 541 } 542 printk("\n"); 543 } 544 545 static void 546 idt77252_tx_dump(struct idt77252_dev *card) 547 { 548 struct atm_vcc *vcc; 549 struct vc_map *vc; 550 int i; 551 552 printk("%s\n", __func__); 553 for (i = 0; i < card->tct_size; i++) { 554 vc = card->vcs[i]; 555 if (!vc) 556 continue; 557 558 vcc = NULL; 559 if (vc->rx_vcc) 560 vcc = vc->rx_vcc; 561 else if (vc->tx_vcc) 562 vcc = vc->tx_vcc; 563 564 if (!vcc) 565 continue; 566 567 printk("%s: Connection %d:\n", card->name, vc->index); 568 dump_tct(card, vc->index); 569 } 570 } 571 #endif 572 573 574 /*****************************************************************************/ 575 /* */ 576 /* SCQ Handling */ 577 /* */ 578 /*****************************************************************************/ 579 580 static int 581 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue) 582 { 583 struct sb_pool *pool = &card->sbpool[queue]; 584 int index; 585 586 index = pool->index; 587 while (pool->skb[index]) { 588 index = (index + 1) & FBQ_MASK; 589 if (index == pool->index) 590 return -ENOBUFS; 591 } 592 593 pool->skb[index] = skb; 594 IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index); 595 596 pool->index = (index + 1) & FBQ_MASK; 597 return 0; 598 } 599 600 static void 601 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb) 602 { 603 unsigned int queue, index; 604 u32 handle; 605 606 handle = IDT77252_PRV_POOL(skb); 607 608 queue = POOL_QUEUE(handle); 609 if (queue > 3) 610 return; 611 612 index = POOL_INDEX(handle); 613 if (index > FBQ_SIZE - 1) 614 return; 615 616 card->sbpool[queue].skb[index] = NULL; 617 } 618 619 static struct sk_buff * 620 sb_pool_skb(struct idt77252_dev *card, u32 handle) 621 { 622 unsigned int queue, index; 623 624 queue = POOL_QUEUE(handle); 625 if (queue > 3) 626 return NULL; 627 628 index = POOL_INDEX(handle); 629 if (index > FBQ_SIZE - 1) 630 return NULL; 631 632 return card->sbpool[queue].skb[index]; 633 } 634 635 static struct scq_info * 636 alloc_scq(struct idt77252_dev *card, int class) 637 { 638 struct scq_info *scq; 639 640 scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL); 641 if (!scq) 642 return NULL; 643 scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE, 644 &scq->paddr); 645 if (scq->base == NULL) { 646 kfree(scq); 647 return NULL; 648 } 649 memset(scq->base, 0, SCQ_SIZE); 650 651 scq->next = scq->base; 652 scq->last = scq->base + (SCQ_ENTRIES - 1); 653 atomic_set(&scq->used, 0); 654 655 spin_lock_init(&scq->lock); 656 spin_lock_init(&scq->skblock); 657 658 skb_queue_head_init(&scq->transmit); 659 skb_queue_head_init(&scq->pending); 660 661 TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n", 662 scq->base, scq->next, scq->last, (unsigned long long)scq->paddr); 663 664 return scq; 665 } 666 667 static void 668 free_scq(struct idt77252_dev *card, struct scq_info *scq) 669 { 670 struct sk_buff *skb; 671 struct atm_vcc *vcc; 672 673 pci_free_consistent(card->pcidev, SCQ_SIZE, 674 scq->base, scq->paddr); 675 676 while ((skb = skb_dequeue(&scq->transmit))) { 677 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb), 678 skb->len, PCI_DMA_TODEVICE); 679 680 vcc = ATM_SKB(skb)->vcc; 681 if (vcc->pop) 682 vcc->pop(vcc, skb); 683 else 684 dev_kfree_skb(skb); 685 } 686 687 while ((skb = skb_dequeue(&scq->pending))) { 688 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb), 689 skb->len, PCI_DMA_TODEVICE); 690 691 vcc = ATM_SKB(skb)->vcc; 692 if (vcc->pop) 693 vcc->pop(vcc, skb); 694 else 695 dev_kfree_skb(skb); 696 } 697 698 kfree(scq); 699 } 700 701 702 static int 703 push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb) 704 { 705 struct scq_info *scq = vc->scq; 706 unsigned long flags; 707 struct scqe *tbd; 708 int entries; 709 710 TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next); 711 712 atomic_inc(&scq->used); 713 entries = atomic_read(&scq->used); 714 if (entries > (SCQ_ENTRIES - 1)) { 715 atomic_dec(&scq->used); 716 goto out; 717 } 718 719 skb_queue_tail(&scq->transmit, skb); 720 721 spin_lock_irqsave(&vc->lock, flags); 722 if (vc->estimator) { 723 struct atm_vcc *vcc = vc->tx_vcc; 724 struct sock *sk = sk_atm(vcc); 725 726 vc->estimator->cells += (skb->len + 47) / 48; 727 if (atomic_read(&sk->sk_wmem_alloc) > 728 (sk->sk_sndbuf >> 1)) { 729 u32 cps = vc->estimator->maxcps; 730 731 vc->estimator->cps = cps; 732 vc->estimator->avcps = cps << 5; 733 if (vc->lacr < vc->init_er) { 734 vc->lacr = vc->init_er; 735 writel(TCMDQ_LACR | (vc->lacr << 16) | 736 vc->index, SAR_REG_TCMDQ); 737 } 738 } 739 } 740 spin_unlock_irqrestore(&vc->lock, flags); 741 742 tbd = &IDT77252_PRV_TBD(skb); 743 744 spin_lock_irqsave(&scq->lock, flags); 745 scq->next->word_1 = cpu_to_le32(tbd->word_1 | 746 SAR_TBD_TSIF | SAR_TBD_GTSI); 747 scq->next->word_2 = cpu_to_le32(tbd->word_2); 748 scq->next->word_3 = cpu_to_le32(tbd->word_3); 749 scq->next->word_4 = cpu_to_le32(tbd->word_4); 750 751 if (scq->next == scq->last) 752 scq->next = scq->base; 753 else 754 scq->next++; 755 756 write_sram(card, scq->scd, 757 scq->paddr + 758 (u32)((unsigned long)scq->next - (unsigned long)scq->base)); 759 spin_unlock_irqrestore(&scq->lock, flags); 760 761 scq->trans_start = jiffies; 762 763 if (test_and_clear_bit(VCF_IDLE, &vc->flags)) { 764 writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index, 765 SAR_REG_TCMDQ); 766 } 767 768 TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used)); 769 770 XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n", 771 card->name, atomic_read(&scq->used), 772 read_sram(card, scq->scd + 1), scq->next); 773 774 return 0; 775 776 out: 777 if (time_after(jiffies, scq->trans_start + HZ)) { 778 printk("%s: Error pushing TBD for %d.%d\n", 779 card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci); 780 #ifdef CONFIG_ATM_IDT77252_DEBUG 781 idt77252_tx_dump(card); 782 #endif 783 scq->trans_start = jiffies; 784 } 785 786 return -ENOBUFS; 787 } 788 789 790 static void 791 drain_scq(struct idt77252_dev *card, struct vc_map *vc) 792 { 793 struct scq_info *scq = vc->scq; 794 struct sk_buff *skb; 795 struct atm_vcc *vcc; 796 797 TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n", 798 card->name, atomic_read(&scq->used), scq->next); 799 800 skb = skb_dequeue(&scq->transmit); 801 if (skb) { 802 TXPRINTK("%s: freeing skb at %p.\n", card->name, skb); 803 804 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb), 805 skb->len, PCI_DMA_TODEVICE); 806 807 vcc = ATM_SKB(skb)->vcc; 808 809 if (vcc->pop) 810 vcc->pop(vcc, skb); 811 else 812 dev_kfree_skb(skb); 813 814 atomic_inc(&vcc->stats->tx); 815 } 816 817 atomic_dec(&scq->used); 818 819 spin_lock(&scq->skblock); 820 while ((skb = skb_dequeue(&scq->pending))) { 821 if (push_on_scq(card, vc, skb)) { 822 skb_queue_head(&vc->scq->pending, skb); 823 break; 824 } 825 } 826 spin_unlock(&scq->skblock); 827 } 828 829 static int 830 queue_skb(struct idt77252_dev *card, struct vc_map *vc, 831 struct sk_buff *skb, int oam) 832 { 833 struct atm_vcc *vcc; 834 struct scqe *tbd; 835 unsigned long flags; 836 int error; 837 int aal; 838 839 if (skb->len == 0) { 840 printk("%s: invalid skb->len (%d)\n", card->name, skb->len); 841 return -EINVAL; 842 } 843 844 TXPRINTK("%s: Sending %d bytes of data.\n", 845 card->name, skb->len); 846 847 tbd = &IDT77252_PRV_TBD(skb); 848 vcc = ATM_SKB(skb)->vcc; 849 850 IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data, 851 skb->len, PCI_DMA_TODEVICE); 852 853 error = -EINVAL; 854 855 if (oam) { 856 if (skb->len != 52) 857 goto errout; 858 859 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU; 860 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4; 861 tbd->word_3 = 0x00000000; 862 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) | 863 (skb->data[2] << 8) | (skb->data[3] << 0); 864 865 if (test_bit(VCF_RSV, &vc->flags)) 866 vc = card->vcs[0]; 867 868 goto done; 869 } 870 871 if (test_bit(VCF_RSV, &vc->flags)) { 872 printk("%s: Trying to transmit on reserved VC\n", card->name); 873 goto errout; 874 } 875 876 aal = vcc->qos.aal; 877 878 switch (aal) { 879 case ATM_AAL0: 880 case ATM_AAL34: 881 if (skb->len > 52) 882 goto errout; 883 884 if (aal == ATM_AAL0) 885 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 | 886 ATM_CELL_PAYLOAD; 887 else 888 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 | 889 ATM_CELL_PAYLOAD; 890 891 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4; 892 tbd->word_3 = 0x00000000; 893 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) | 894 (skb->data[2] << 8) | (skb->data[3] << 0); 895 break; 896 897 case ATM_AAL5: 898 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len; 899 tbd->word_2 = IDT77252_PRV_PADDR(skb); 900 tbd->word_3 = skb->len; 901 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) | 902 (vcc->vci << SAR_TBD_VCI_SHIFT); 903 break; 904 905 case ATM_AAL1: 906 case ATM_AAL2: 907 default: 908 printk("%s: Traffic type not supported.\n", card->name); 909 error = -EPROTONOSUPPORT; 910 goto errout; 911 } 912 913 done: 914 spin_lock_irqsave(&vc->scq->skblock, flags); 915 skb_queue_tail(&vc->scq->pending, skb); 916 917 while ((skb = skb_dequeue(&vc->scq->pending))) { 918 if (push_on_scq(card, vc, skb)) { 919 skb_queue_head(&vc->scq->pending, skb); 920 break; 921 } 922 } 923 spin_unlock_irqrestore(&vc->scq->skblock, flags); 924 925 return 0; 926 927 errout: 928 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb), 929 skb->len, PCI_DMA_TODEVICE); 930 return error; 931 } 932 933 static unsigned long 934 get_free_scd(struct idt77252_dev *card, struct vc_map *vc) 935 { 936 int i; 937 938 for (i = 0; i < card->scd_size; i++) { 939 if (!card->scd2vc[i]) { 940 card->scd2vc[i] = vc; 941 vc->scd_index = i; 942 return card->scd_base + i * SAR_SRAM_SCD_SIZE; 943 } 944 } 945 return 0; 946 } 947 948 static void 949 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class) 950 { 951 write_sram(card, scq->scd, scq->paddr); 952 write_sram(card, scq->scd + 1, 0x00000000); 953 write_sram(card, scq->scd + 2, 0xffffffff); 954 write_sram(card, scq->scd + 3, 0x00000000); 955 } 956 957 static void 958 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class) 959 { 960 return; 961 } 962 963 /*****************************************************************************/ 964 /* */ 965 /* RSQ Handling */ 966 /* */ 967 /*****************************************************************************/ 968 969 static int 970 init_rsq(struct idt77252_dev *card) 971 { 972 struct rsq_entry *rsqe; 973 974 card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE, 975 &card->rsq.paddr); 976 if (card->rsq.base == NULL) { 977 printk("%s: can't allocate RSQ.\n", card->name); 978 return -1; 979 } 980 memset(card->rsq.base, 0, RSQSIZE); 981 982 card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1; 983 card->rsq.next = card->rsq.last; 984 for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++) 985 rsqe->word_4 = 0; 986 987 writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base, 988 SAR_REG_RSQH); 989 writel(card->rsq.paddr, SAR_REG_RSQB); 990 991 IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name, 992 (unsigned long) card->rsq.base, 993 readl(SAR_REG_RSQB)); 994 IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n", 995 card->name, 996 readl(SAR_REG_RSQH), 997 readl(SAR_REG_RSQB), 998 readl(SAR_REG_RSQT)); 999 1000 return 0; 1001 } 1002 1003 static void 1004 deinit_rsq(struct idt77252_dev *card) 1005 { 1006 pci_free_consistent(card->pcidev, RSQSIZE, 1007 card->rsq.base, card->rsq.paddr); 1008 } 1009 1010 static void 1011 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe) 1012 { 1013 struct atm_vcc *vcc; 1014 struct sk_buff *skb; 1015 struct rx_pool *rpp; 1016 struct vc_map *vc; 1017 u32 header, vpi, vci; 1018 u32 stat; 1019 int i; 1020 1021 stat = le32_to_cpu(rsqe->word_4); 1022 1023 if (stat & SAR_RSQE_IDLE) { 1024 RXPRINTK("%s: message about inactive connection.\n", 1025 card->name); 1026 return; 1027 } 1028 1029 skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2)); 1030 if (skb == NULL) { 1031 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n", 1032 card->name, __func__, 1033 le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2), 1034 le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4)); 1035 return; 1036 } 1037 1038 header = le32_to_cpu(rsqe->word_1); 1039 vpi = (header >> 16) & 0x00ff; 1040 vci = (header >> 0) & 0xffff; 1041 1042 RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n", 1043 card->name, vpi, vci, skb, skb->data); 1044 1045 if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) { 1046 printk("%s: SDU received for out-of-range vc %u.%u\n", 1047 card->name, vpi, vci); 1048 recycle_rx_skb(card, skb); 1049 return; 1050 } 1051 1052 vc = card->vcs[VPCI2VC(card, vpi, vci)]; 1053 if (!vc || !test_bit(VCF_RX, &vc->flags)) { 1054 printk("%s: SDU received on non RX vc %u.%u\n", 1055 card->name, vpi, vci); 1056 recycle_rx_skb(card, skb); 1057 return; 1058 } 1059 1060 vcc = vc->rx_vcc; 1061 1062 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb), 1063 skb_end_pointer(skb) - skb->data, 1064 PCI_DMA_FROMDEVICE); 1065 1066 if ((vcc->qos.aal == ATM_AAL0) || 1067 (vcc->qos.aal == ATM_AAL34)) { 1068 struct sk_buff *sb; 1069 unsigned char *cell; 1070 u32 aal0; 1071 1072 cell = skb->data; 1073 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) { 1074 if ((sb = dev_alloc_skb(64)) == NULL) { 1075 printk("%s: Can't allocate buffers for aal0.\n", 1076 card->name); 1077 atomic_add(i, &vcc->stats->rx_drop); 1078 break; 1079 } 1080 if (!atm_charge(vcc, sb->truesize)) { 1081 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n", 1082 card->name); 1083 atomic_add(i - 1, &vcc->stats->rx_drop); 1084 dev_kfree_skb(sb); 1085 break; 1086 } 1087 aal0 = (vpi << ATM_HDR_VPI_SHIFT) | 1088 (vci << ATM_HDR_VCI_SHIFT); 1089 aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0; 1090 aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0; 1091 1092 *((u32 *) sb->data) = aal0; 1093 skb_put(sb, sizeof(u32)); 1094 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), 1095 cell, ATM_CELL_PAYLOAD); 1096 1097 ATM_SKB(sb)->vcc = vcc; 1098 __net_timestamp(sb); 1099 vcc->push(vcc, sb); 1100 atomic_inc(&vcc->stats->rx); 1101 1102 cell += ATM_CELL_PAYLOAD; 1103 } 1104 1105 recycle_rx_skb(card, skb); 1106 return; 1107 } 1108 if (vcc->qos.aal != ATM_AAL5) { 1109 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n", 1110 card->name, vcc->qos.aal); 1111 recycle_rx_skb(card, skb); 1112 return; 1113 } 1114 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD; 1115 1116 rpp = &vc->rcv.rx_pool; 1117 1118 __skb_queue_tail(&rpp->queue, skb); 1119 rpp->len += skb->len; 1120 1121 if (stat & SAR_RSQE_EPDU) { 1122 unsigned char *l1l2; 1123 unsigned int len; 1124 1125 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6); 1126 1127 len = (l1l2[0] << 8) | l1l2[1]; 1128 len = len ? len : 0x10000; 1129 1130 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len); 1131 1132 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) { 1133 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. " 1134 "(CDC: %08x)\n", 1135 card->name, len, rpp->len, readl(SAR_REG_CDC)); 1136 recycle_rx_pool_skb(card, rpp); 1137 atomic_inc(&vcc->stats->rx_err); 1138 return; 1139 } 1140 if (stat & SAR_RSQE_CRC) { 1141 RXPRINTK("%s: AAL5 CRC error.\n", card->name); 1142 recycle_rx_pool_skb(card, rpp); 1143 atomic_inc(&vcc->stats->rx_err); 1144 return; 1145 } 1146 if (skb_queue_len(&rpp->queue) > 1) { 1147 struct sk_buff *sb; 1148 1149 skb = dev_alloc_skb(rpp->len); 1150 if (!skb) { 1151 RXPRINTK("%s: Can't alloc RX skb.\n", 1152 card->name); 1153 recycle_rx_pool_skb(card, rpp); 1154 atomic_inc(&vcc->stats->rx_err); 1155 return; 1156 } 1157 if (!atm_charge(vcc, skb->truesize)) { 1158 recycle_rx_pool_skb(card, rpp); 1159 dev_kfree_skb(skb); 1160 return; 1161 } 1162 skb_queue_walk(&rpp->queue, sb) 1163 memcpy(skb_put(skb, sb->len), 1164 sb->data, sb->len); 1165 1166 recycle_rx_pool_skb(card, rpp); 1167 1168 skb_trim(skb, len); 1169 ATM_SKB(skb)->vcc = vcc; 1170 __net_timestamp(skb); 1171 1172 vcc->push(vcc, skb); 1173 atomic_inc(&vcc->stats->rx); 1174 1175 return; 1176 } 1177 1178 flush_rx_pool(card, rpp); 1179 1180 if (!atm_charge(vcc, skb->truesize)) { 1181 recycle_rx_skb(card, skb); 1182 return; 1183 } 1184 1185 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb), 1186 skb_end_pointer(skb) - skb->data, 1187 PCI_DMA_FROMDEVICE); 1188 sb_pool_remove(card, skb); 1189 1190 skb_trim(skb, len); 1191 ATM_SKB(skb)->vcc = vcc; 1192 __net_timestamp(skb); 1193 1194 vcc->push(vcc, skb); 1195 atomic_inc(&vcc->stats->rx); 1196 1197 if (skb->truesize > SAR_FB_SIZE_3) 1198 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1); 1199 else if (skb->truesize > SAR_FB_SIZE_2) 1200 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1); 1201 else if (skb->truesize > SAR_FB_SIZE_1) 1202 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1); 1203 else 1204 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1); 1205 return; 1206 } 1207 } 1208 1209 static void 1210 idt77252_rx(struct idt77252_dev *card) 1211 { 1212 struct rsq_entry *rsqe; 1213 1214 if (card->rsq.next == card->rsq.last) 1215 rsqe = card->rsq.base; 1216 else 1217 rsqe = card->rsq.next + 1; 1218 1219 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) { 1220 RXPRINTK("%s: no entry in RSQ.\n", card->name); 1221 return; 1222 } 1223 1224 do { 1225 dequeue_rx(card, rsqe); 1226 rsqe->word_4 = 0; 1227 card->rsq.next = rsqe; 1228 if (card->rsq.next == card->rsq.last) 1229 rsqe = card->rsq.base; 1230 else 1231 rsqe = card->rsq.next + 1; 1232 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID); 1233 1234 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base, 1235 SAR_REG_RSQH); 1236 } 1237 1238 static void 1239 idt77252_rx_raw(struct idt77252_dev *card) 1240 { 1241 struct sk_buff *queue; 1242 u32 head, tail; 1243 struct atm_vcc *vcc; 1244 struct vc_map *vc; 1245 struct sk_buff *sb; 1246 1247 if (card->raw_cell_head == NULL) { 1248 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1)); 1249 card->raw_cell_head = sb_pool_skb(card, handle); 1250 } 1251 1252 queue = card->raw_cell_head; 1253 if (!queue) 1254 return; 1255 1256 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16); 1257 tail = readl(SAR_REG_RAWCT); 1258 1259 pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue), 1260 skb_end_pointer(queue) - queue->head - 16, 1261 PCI_DMA_FROMDEVICE); 1262 1263 while (head != tail) { 1264 unsigned int vpi, vci, pti; 1265 u32 header; 1266 1267 header = le32_to_cpu(*(u32 *) &queue->data[0]); 1268 1269 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT; 1270 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT; 1271 pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT; 1272 1273 #ifdef CONFIG_ATM_IDT77252_DEBUG 1274 if (debug & DBG_RAW_CELL) { 1275 int i; 1276 1277 printk("%s: raw cell %x.%02x.%04x.%x.%x\n", 1278 card->name, (header >> 28) & 0x000f, 1279 (header >> 20) & 0x00ff, 1280 (header >> 4) & 0xffff, 1281 (header >> 1) & 0x0007, 1282 (header >> 0) & 0x0001); 1283 for (i = 16; i < 64; i++) 1284 printk(" %02x", queue->data[i]); 1285 printk("\n"); 1286 } 1287 #endif 1288 1289 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) { 1290 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n", 1291 card->name, vpi, vci); 1292 goto drop; 1293 } 1294 1295 vc = card->vcs[VPCI2VC(card, vpi, vci)]; 1296 if (!vc || !test_bit(VCF_RX, &vc->flags)) { 1297 RPRINTK("%s: SDU received on non RX vc %u.%u\n", 1298 card->name, vpi, vci); 1299 goto drop; 1300 } 1301 1302 vcc = vc->rx_vcc; 1303 1304 if (vcc->qos.aal != ATM_AAL0) { 1305 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n", 1306 card->name, vpi, vci); 1307 atomic_inc(&vcc->stats->rx_drop); 1308 goto drop; 1309 } 1310 1311 if ((sb = dev_alloc_skb(64)) == NULL) { 1312 printk("%s: Can't allocate buffers for AAL0.\n", 1313 card->name); 1314 atomic_inc(&vcc->stats->rx_err); 1315 goto drop; 1316 } 1317 1318 if (!atm_charge(vcc, sb->truesize)) { 1319 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n", 1320 card->name); 1321 dev_kfree_skb(sb); 1322 goto drop; 1323 } 1324 1325 *((u32 *) sb->data) = header; 1326 skb_put(sb, sizeof(u32)); 1327 memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]), 1328 ATM_CELL_PAYLOAD); 1329 1330 ATM_SKB(sb)->vcc = vcc; 1331 __net_timestamp(sb); 1332 vcc->push(vcc, sb); 1333 atomic_inc(&vcc->stats->rx); 1334 1335 drop: 1336 skb_pull(queue, 64); 1337 1338 head = IDT77252_PRV_PADDR(queue) 1339 + (queue->data - queue->head - 16); 1340 1341 if (queue->len < 128) { 1342 struct sk_buff *next; 1343 u32 handle; 1344 1345 head = le32_to_cpu(*(u32 *) &queue->data[0]); 1346 handle = le32_to_cpu(*(u32 *) &queue->data[4]); 1347 1348 next = sb_pool_skb(card, handle); 1349 recycle_rx_skb(card, queue); 1350 1351 if (next) { 1352 card->raw_cell_head = next; 1353 queue = card->raw_cell_head; 1354 pci_dma_sync_single_for_cpu(card->pcidev, 1355 IDT77252_PRV_PADDR(queue), 1356 (skb_end_pointer(queue) - 1357 queue->data), 1358 PCI_DMA_FROMDEVICE); 1359 } else { 1360 card->raw_cell_head = NULL; 1361 printk("%s: raw cell queue overrun\n", 1362 card->name); 1363 break; 1364 } 1365 } 1366 } 1367 } 1368 1369 1370 /*****************************************************************************/ 1371 /* */ 1372 /* TSQ Handling */ 1373 /* */ 1374 /*****************************************************************************/ 1375 1376 static int 1377 init_tsq(struct idt77252_dev *card) 1378 { 1379 struct tsq_entry *tsqe; 1380 1381 card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE, 1382 &card->tsq.paddr); 1383 if (card->tsq.base == NULL) { 1384 printk("%s: can't allocate TSQ.\n", card->name); 1385 return -1; 1386 } 1387 memset(card->tsq.base, 0, TSQSIZE); 1388 1389 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1; 1390 card->tsq.next = card->tsq.last; 1391 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++) 1392 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID); 1393 1394 writel(card->tsq.paddr, SAR_REG_TSQB); 1395 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base, 1396 SAR_REG_TSQH); 1397 1398 return 0; 1399 } 1400 1401 static void 1402 deinit_tsq(struct idt77252_dev *card) 1403 { 1404 pci_free_consistent(card->pcidev, TSQSIZE, 1405 card->tsq.base, card->tsq.paddr); 1406 } 1407 1408 static void 1409 idt77252_tx(struct idt77252_dev *card) 1410 { 1411 struct tsq_entry *tsqe; 1412 unsigned int vpi, vci; 1413 struct vc_map *vc; 1414 u32 conn, stat; 1415 1416 if (card->tsq.next == card->tsq.last) 1417 tsqe = card->tsq.base; 1418 else 1419 tsqe = card->tsq.next + 1; 1420 1421 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe, 1422 card->tsq.base, card->tsq.next, card->tsq.last); 1423 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n", 1424 readl(SAR_REG_TSQB), 1425 readl(SAR_REG_TSQT), 1426 readl(SAR_REG_TSQH)); 1427 1428 stat = le32_to_cpu(tsqe->word_2); 1429 1430 if (stat & SAR_TSQE_INVALID) 1431 return; 1432 1433 do { 1434 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe, 1435 le32_to_cpu(tsqe->word_1), 1436 le32_to_cpu(tsqe->word_2)); 1437 1438 switch (stat & SAR_TSQE_TYPE) { 1439 case SAR_TSQE_TYPE_TIMER: 1440 TXPRINTK("%s: Timer RollOver detected.\n", card->name); 1441 break; 1442 1443 case SAR_TSQE_TYPE_IDLE: 1444 1445 conn = le32_to_cpu(tsqe->word_1); 1446 1447 if (SAR_TSQE_TAG(stat) == 0x10) { 1448 #ifdef NOTDEF 1449 printk("%s: Connection %d halted.\n", 1450 card->name, 1451 le32_to_cpu(tsqe->word_1) & 0x1fff); 1452 #endif 1453 break; 1454 } 1455 1456 vc = card->vcs[conn & 0x1fff]; 1457 if (!vc) { 1458 printk("%s: could not find VC from conn %d\n", 1459 card->name, conn & 0x1fff); 1460 break; 1461 } 1462 1463 printk("%s: Connection %d IDLE.\n", 1464 card->name, vc->index); 1465 1466 set_bit(VCF_IDLE, &vc->flags); 1467 break; 1468 1469 case SAR_TSQE_TYPE_TSR: 1470 1471 conn = le32_to_cpu(tsqe->word_1); 1472 1473 vc = card->vcs[conn & 0x1fff]; 1474 if (!vc) { 1475 printk("%s: no VC at index %d\n", 1476 card->name, 1477 le32_to_cpu(tsqe->word_1) & 0x1fff); 1478 break; 1479 } 1480 1481 drain_scq(card, vc); 1482 break; 1483 1484 case SAR_TSQE_TYPE_TBD_COMP: 1485 1486 conn = le32_to_cpu(tsqe->word_1); 1487 1488 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff; 1489 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff; 1490 1491 if (vpi >= (1 << card->vpibits) || 1492 vci >= (1 << card->vcibits)) { 1493 printk("%s: TBD complete: " 1494 "out of range VPI.VCI %u.%u\n", 1495 card->name, vpi, vci); 1496 break; 1497 } 1498 1499 vc = card->vcs[VPCI2VC(card, vpi, vci)]; 1500 if (!vc) { 1501 printk("%s: TBD complete: " 1502 "no VC at VPI.VCI %u.%u\n", 1503 card->name, vpi, vci); 1504 break; 1505 } 1506 1507 drain_scq(card, vc); 1508 break; 1509 } 1510 1511 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID); 1512 1513 card->tsq.next = tsqe; 1514 if (card->tsq.next == card->tsq.last) 1515 tsqe = card->tsq.base; 1516 else 1517 tsqe = card->tsq.next + 1; 1518 1519 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe, 1520 card->tsq.base, card->tsq.next, card->tsq.last); 1521 1522 stat = le32_to_cpu(tsqe->word_2); 1523 1524 } while (!(stat & SAR_TSQE_INVALID)); 1525 1526 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base, 1527 SAR_REG_TSQH); 1528 1529 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n", 1530 card->index, readl(SAR_REG_TSQH), 1531 readl(SAR_REG_TSQT), card->tsq.next); 1532 } 1533 1534 1535 static void 1536 tst_timer(unsigned long data) 1537 { 1538 struct idt77252_dev *card = (struct idt77252_dev *)data; 1539 unsigned long base, idle, jump; 1540 unsigned long flags; 1541 u32 pc; 1542 int e; 1543 1544 spin_lock_irqsave(&card->tst_lock, flags); 1545 1546 base = card->tst[card->tst_index]; 1547 idle = card->tst[card->tst_index ^ 1]; 1548 1549 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) { 1550 jump = base + card->tst_size - 2; 1551 1552 pc = readl(SAR_REG_NOW) >> 2; 1553 if ((pc ^ idle) & ~(card->tst_size - 1)) { 1554 mod_timer(&card->tst_timer, jiffies + 1); 1555 goto out; 1556 } 1557 1558 clear_bit(TST_SWITCH_WAIT, &card->tst_state); 1559 1560 card->tst_index ^= 1; 1561 write_sram(card, jump, TSTE_OPC_JMP | (base << 2)); 1562 1563 base = card->tst[card->tst_index]; 1564 idle = card->tst[card->tst_index ^ 1]; 1565 1566 for (e = 0; e < card->tst_size - 2; e++) { 1567 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) { 1568 write_sram(card, idle + e, 1569 card->soft_tst[e].tste & TSTE_MASK); 1570 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE); 1571 } 1572 } 1573 } 1574 1575 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) { 1576 1577 for (e = 0; e < card->tst_size - 2; e++) { 1578 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) { 1579 write_sram(card, idle + e, 1580 card->soft_tst[e].tste & TSTE_MASK); 1581 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE); 1582 card->soft_tst[e].tste |= TSTE_PUSH_IDLE; 1583 } 1584 } 1585 1586 jump = base + card->tst_size - 2; 1587 1588 write_sram(card, jump, TSTE_OPC_NULL); 1589 set_bit(TST_SWITCH_WAIT, &card->tst_state); 1590 1591 mod_timer(&card->tst_timer, jiffies + 1); 1592 } 1593 1594 out: 1595 spin_unlock_irqrestore(&card->tst_lock, flags); 1596 } 1597 1598 static int 1599 __fill_tst(struct idt77252_dev *card, struct vc_map *vc, 1600 int n, unsigned int opc) 1601 { 1602 unsigned long cl, avail; 1603 unsigned long idle; 1604 int e, r; 1605 u32 data; 1606 1607 avail = card->tst_size - 2; 1608 for (e = 0; e < avail; e++) { 1609 if (card->soft_tst[e].vc == NULL) 1610 break; 1611 } 1612 if (e >= avail) { 1613 printk("%s: No free TST entries found\n", card->name); 1614 return -1; 1615 } 1616 1617 NPRINTK("%s: conn %d: first TST entry at %d.\n", 1618 card->name, vc ? vc->index : -1, e); 1619 1620 r = n; 1621 cl = avail; 1622 data = opc & TSTE_OPC_MASK; 1623 if (vc && (opc != TSTE_OPC_NULL)) 1624 data = opc | vc->index; 1625 1626 idle = card->tst[card->tst_index ^ 1]; 1627 1628 /* 1629 * Fill Soft TST. 1630 */ 1631 while (r > 0) { 1632 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) { 1633 if (vc) 1634 card->soft_tst[e].vc = vc; 1635 else 1636 card->soft_tst[e].vc = (void *)-1; 1637 1638 card->soft_tst[e].tste = data; 1639 if (timer_pending(&card->tst_timer)) 1640 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE; 1641 else { 1642 write_sram(card, idle + e, data); 1643 card->soft_tst[e].tste |= TSTE_PUSH_IDLE; 1644 } 1645 1646 cl -= card->tst_size; 1647 r--; 1648 } 1649 1650 if (++e == avail) 1651 e = 0; 1652 cl += n; 1653 } 1654 1655 return 0; 1656 } 1657 1658 static int 1659 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc) 1660 { 1661 unsigned long flags; 1662 int res; 1663 1664 spin_lock_irqsave(&card->tst_lock, flags); 1665 1666 res = __fill_tst(card, vc, n, opc); 1667 1668 set_bit(TST_SWITCH_PENDING, &card->tst_state); 1669 if (!timer_pending(&card->tst_timer)) 1670 mod_timer(&card->tst_timer, jiffies + 1); 1671 1672 spin_unlock_irqrestore(&card->tst_lock, flags); 1673 return res; 1674 } 1675 1676 static int 1677 __clear_tst(struct idt77252_dev *card, struct vc_map *vc) 1678 { 1679 unsigned long idle; 1680 int e; 1681 1682 idle = card->tst[card->tst_index ^ 1]; 1683 1684 for (e = 0; e < card->tst_size - 2; e++) { 1685 if (card->soft_tst[e].vc == vc) { 1686 card->soft_tst[e].vc = NULL; 1687 1688 card->soft_tst[e].tste = TSTE_OPC_VAR; 1689 if (timer_pending(&card->tst_timer)) 1690 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE; 1691 else { 1692 write_sram(card, idle + e, TSTE_OPC_VAR); 1693 card->soft_tst[e].tste |= TSTE_PUSH_IDLE; 1694 } 1695 } 1696 } 1697 1698 return 0; 1699 } 1700 1701 static int 1702 clear_tst(struct idt77252_dev *card, struct vc_map *vc) 1703 { 1704 unsigned long flags; 1705 int res; 1706 1707 spin_lock_irqsave(&card->tst_lock, flags); 1708 1709 res = __clear_tst(card, vc); 1710 1711 set_bit(TST_SWITCH_PENDING, &card->tst_state); 1712 if (!timer_pending(&card->tst_timer)) 1713 mod_timer(&card->tst_timer, jiffies + 1); 1714 1715 spin_unlock_irqrestore(&card->tst_lock, flags); 1716 return res; 1717 } 1718 1719 static int 1720 change_tst(struct idt77252_dev *card, struct vc_map *vc, 1721 int n, unsigned int opc) 1722 { 1723 unsigned long flags; 1724 int res; 1725 1726 spin_lock_irqsave(&card->tst_lock, flags); 1727 1728 __clear_tst(card, vc); 1729 res = __fill_tst(card, vc, n, opc); 1730 1731 set_bit(TST_SWITCH_PENDING, &card->tst_state); 1732 if (!timer_pending(&card->tst_timer)) 1733 mod_timer(&card->tst_timer, jiffies + 1); 1734 1735 spin_unlock_irqrestore(&card->tst_lock, flags); 1736 return res; 1737 } 1738 1739 1740 static int 1741 set_tct(struct idt77252_dev *card, struct vc_map *vc) 1742 { 1743 unsigned long tct; 1744 1745 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE); 1746 1747 switch (vc->class) { 1748 case SCHED_CBR: 1749 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n", 1750 card->name, tct, vc->scq->scd); 1751 1752 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd); 1753 write_sram(card, tct + 1, 0); 1754 write_sram(card, tct + 2, 0); 1755 write_sram(card, tct + 3, 0); 1756 write_sram(card, tct + 4, 0); 1757 write_sram(card, tct + 5, 0); 1758 write_sram(card, tct + 6, 0); 1759 write_sram(card, tct + 7, 0); 1760 break; 1761 1762 case SCHED_UBR: 1763 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n", 1764 card->name, tct, vc->scq->scd); 1765 1766 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd); 1767 write_sram(card, tct + 1, 0); 1768 write_sram(card, tct + 2, TCT_TSIF); 1769 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE); 1770 write_sram(card, tct + 4, 0); 1771 write_sram(card, tct + 5, vc->init_er); 1772 write_sram(card, tct + 6, 0); 1773 write_sram(card, tct + 7, TCT_FLAG_UBR); 1774 break; 1775 1776 case SCHED_VBR: 1777 case SCHED_ABR: 1778 default: 1779 return -ENOSYS; 1780 } 1781 1782 return 0; 1783 } 1784 1785 /*****************************************************************************/ 1786 /* */ 1787 /* FBQ Handling */ 1788 /* */ 1789 /*****************************************************************************/ 1790 1791 static __inline__ int 1792 idt77252_fbq_level(struct idt77252_dev *card, int queue) 1793 { 1794 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f; 1795 } 1796 1797 static __inline__ int 1798 idt77252_fbq_full(struct idt77252_dev *card, int queue) 1799 { 1800 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f; 1801 } 1802 1803 static int 1804 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue) 1805 { 1806 unsigned long flags; 1807 u32 handle; 1808 u32 addr; 1809 1810 skb->data = skb->head; 1811 skb_reset_tail_pointer(skb); 1812 skb->len = 0; 1813 1814 skb_reserve(skb, 16); 1815 1816 switch (queue) { 1817 case 0: 1818 skb_put(skb, SAR_FB_SIZE_0); 1819 break; 1820 case 1: 1821 skb_put(skb, SAR_FB_SIZE_1); 1822 break; 1823 case 2: 1824 skb_put(skb, SAR_FB_SIZE_2); 1825 break; 1826 case 3: 1827 skb_put(skb, SAR_FB_SIZE_3); 1828 break; 1829 default: 1830 return -1; 1831 } 1832 1833 if (idt77252_fbq_full(card, queue)) 1834 return -1; 1835 1836 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32)); 1837 1838 handle = IDT77252_PRV_POOL(skb); 1839 addr = IDT77252_PRV_PADDR(skb); 1840 1841 spin_lock_irqsave(&card->cmd_lock, flags); 1842 writel(handle, card->fbq[queue]); 1843 writel(addr, card->fbq[queue]); 1844 spin_unlock_irqrestore(&card->cmd_lock, flags); 1845 1846 return 0; 1847 } 1848 1849 static void 1850 add_rx_skb(struct idt77252_dev *card, int queue, 1851 unsigned int size, unsigned int count) 1852 { 1853 struct sk_buff *skb; 1854 dma_addr_t paddr; 1855 u32 handle; 1856 1857 while (count--) { 1858 skb = dev_alloc_skb(size); 1859 if (!skb) 1860 return; 1861 1862 if (sb_pool_add(card, skb, queue)) { 1863 printk("%s: SB POOL full\n", __func__); 1864 goto outfree; 1865 } 1866 1867 paddr = pci_map_single(card->pcidev, skb->data, 1868 skb_end_pointer(skb) - skb->data, 1869 PCI_DMA_FROMDEVICE); 1870 IDT77252_PRV_PADDR(skb) = paddr; 1871 1872 if (push_rx_skb(card, skb, queue)) { 1873 printk("%s: FB QUEUE full\n", __func__); 1874 goto outunmap; 1875 } 1876 } 1877 1878 return; 1879 1880 outunmap: 1881 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb), 1882 skb_end_pointer(skb) - skb->data, PCI_DMA_FROMDEVICE); 1883 1884 handle = IDT77252_PRV_POOL(skb); 1885 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL; 1886 1887 outfree: 1888 dev_kfree_skb(skb); 1889 } 1890 1891 1892 static void 1893 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb) 1894 { 1895 u32 handle = IDT77252_PRV_POOL(skb); 1896 int err; 1897 1898 pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb), 1899 skb_end_pointer(skb) - skb->data, 1900 PCI_DMA_FROMDEVICE); 1901 1902 err = push_rx_skb(card, skb, POOL_QUEUE(handle)); 1903 if (err) { 1904 pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb), 1905 skb_end_pointer(skb) - skb->data, 1906 PCI_DMA_FROMDEVICE); 1907 sb_pool_remove(card, skb); 1908 dev_kfree_skb(skb); 1909 } 1910 } 1911 1912 static void 1913 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp) 1914 { 1915 skb_queue_head_init(&rpp->queue); 1916 rpp->len = 0; 1917 } 1918 1919 static void 1920 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp) 1921 { 1922 struct sk_buff *skb, *tmp; 1923 1924 skb_queue_walk_safe(&rpp->queue, skb, tmp) 1925 recycle_rx_skb(card, skb); 1926 1927 flush_rx_pool(card, rpp); 1928 } 1929 1930 /*****************************************************************************/ 1931 /* */ 1932 /* ATM Interface */ 1933 /* */ 1934 /*****************************************************************************/ 1935 1936 static void 1937 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr) 1938 { 1939 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value); 1940 } 1941 1942 static unsigned char 1943 idt77252_phy_get(struct atm_dev *dev, unsigned long addr) 1944 { 1945 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff)); 1946 } 1947 1948 static inline int 1949 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam) 1950 { 1951 struct atm_dev *dev = vcc->dev; 1952 struct idt77252_dev *card = dev->dev_data; 1953 struct vc_map *vc = vcc->dev_data; 1954 int err; 1955 1956 if (vc == NULL) { 1957 printk("%s: NULL connection in send().\n", card->name); 1958 atomic_inc(&vcc->stats->tx_err); 1959 dev_kfree_skb(skb); 1960 return -EINVAL; 1961 } 1962 if (!test_bit(VCF_TX, &vc->flags)) { 1963 printk("%s: Trying to transmit on a non-tx VC.\n", card->name); 1964 atomic_inc(&vcc->stats->tx_err); 1965 dev_kfree_skb(skb); 1966 return -EINVAL; 1967 } 1968 1969 switch (vcc->qos.aal) { 1970 case ATM_AAL0: 1971 case ATM_AAL1: 1972 case ATM_AAL5: 1973 break; 1974 default: 1975 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal); 1976 atomic_inc(&vcc->stats->tx_err); 1977 dev_kfree_skb(skb); 1978 return -EINVAL; 1979 } 1980 1981 if (skb_shinfo(skb)->nr_frags != 0) { 1982 printk("%s: No scatter-gather yet.\n", card->name); 1983 atomic_inc(&vcc->stats->tx_err); 1984 dev_kfree_skb(skb); 1985 return -EINVAL; 1986 } 1987 ATM_SKB(skb)->vcc = vcc; 1988 1989 err = queue_skb(card, vc, skb, oam); 1990 if (err) { 1991 atomic_inc(&vcc->stats->tx_err); 1992 dev_kfree_skb(skb); 1993 return err; 1994 } 1995 1996 return 0; 1997 } 1998 1999 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb) 2000 { 2001 return idt77252_send_skb(vcc, skb, 0); 2002 } 2003 2004 static int 2005 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags) 2006 { 2007 struct atm_dev *dev = vcc->dev; 2008 struct idt77252_dev *card = dev->dev_data; 2009 struct sk_buff *skb; 2010 2011 skb = dev_alloc_skb(64); 2012 if (!skb) { 2013 printk("%s: Out of memory in send_oam().\n", card->name); 2014 atomic_inc(&vcc->stats->tx_err); 2015 return -ENOMEM; 2016 } 2017 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 2018 2019 memcpy(skb_put(skb, 52), cell, 52); 2020 2021 return idt77252_send_skb(vcc, skb, 1); 2022 } 2023 2024 static __inline__ unsigned int 2025 idt77252_fls(unsigned int x) 2026 { 2027 int r = 1; 2028 2029 if (x == 0) 2030 return 0; 2031 if (x & 0xffff0000) { 2032 x >>= 16; 2033 r += 16; 2034 } 2035 if (x & 0xff00) { 2036 x >>= 8; 2037 r += 8; 2038 } 2039 if (x & 0xf0) { 2040 x >>= 4; 2041 r += 4; 2042 } 2043 if (x & 0xc) { 2044 x >>= 2; 2045 r += 2; 2046 } 2047 if (x & 0x2) 2048 r += 1; 2049 return r; 2050 } 2051 2052 static u16 2053 idt77252_int_to_atmfp(unsigned int rate) 2054 { 2055 u16 m, e; 2056 2057 if (rate == 0) 2058 return 0; 2059 e = idt77252_fls(rate) - 1; 2060 if (e < 9) 2061 m = (rate - (1 << e)) << (9 - e); 2062 else if (e == 9) 2063 m = (rate - (1 << e)); 2064 else /* e > 9 */ 2065 m = (rate - (1 << e)) >> (e - 9); 2066 return 0x4000 | (e << 9) | m; 2067 } 2068 2069 static u8 2070 idt77252_rate_logindex(struct idt77252_dev *card, int pcr) 2071 { 2072 u16 afp; 2073 2074 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr); 2075 if (pcr < 0) 2076 return rate_to_log[(afp >> 5) & 0x1ff]; 2077 return rate_to_log[((afp >> 5) + 1) & 0x1ff]; 2078 } 2079 2080 static void 2081 idt77252_est_timer(unsigned long data) 2082 { 2083 struct vc_map *vc = (struct vc_map *)data; 2084 struct idt77252_dev *card = vc->card; 2085 struct rate_estimator *est; 2086 unsigned long flags; 2087 u32 rate, cps; 2088 u64 ncells; 2089 u8 lacr; 2090 2091 spin_lock_irqsave(&vc->lock, flags); 2092 est = vc->estimator; 2093 if (!est) 2094 goto out; 2095 2096 ncells = est->cells; 2097 2098 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval); 2099 est->last_cells = ncells; 2100 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log; 2101 est->cps = (est->avcps + 0x1f) >> 5; 2102 2103 cps = est->cps; 2104 if (cps < (est->maxcps >> 4)) 2105 cps = est->maxcps >> 4; 2106 2107 lacr = idt77252_rate_logindex(card, cps); 2108 if (lacr > vc->max_er) 2109 lacr = vc->max_er; 2110 2111 if (lacr != vc->lacr) { 2112 vc->lacr = lacr; 2113 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ); 2114 } 2115 2116 est->timer.expires = jiffies + ((HZ / 4) << est->interval); 2117 add_timer(&est->timer); 2118 2119 out: 2120 spin_unlock_irqrestore(&vc->lock, flags); 2121 } 2122 2123 static struct rate_estimator * 2124 idt77252_init_est(struct vc_map *vc, int pcr) 2125 { 2126 struct rate_estimator *est; 2127 2128 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL); 2129 if (!est) 2130 return NULL; 2131 est->maxcps = pcr < 0 ? -pcr : pcr; 2132 est->cps = est->maxcps; 2133 est->avcps = est->cps << 5; 2134 2135 est->interval = 2; /* XXX: make this configurable */ 2136 est->ewma_log = 2; /* XXX: make this configurable */ 2137 init_timer(&est->timer); 2138 est->timer.data = (unsigned long)vc; 2139 est->timer.function = idt77252_est_timer; 2140 2141 est->timer.expires = jiffies + ((HZ / 4) << est->interval); 2142 add_timer(&est->timer); 2143 2144 return est; 2145 } 2146 2147 static int 2148 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc, 2149 struct atm_vcc *vcc, struct atm_qos *qos) 2150 { 2151 int tst_free, tst_used, tst_entries; 2152 unsigned long tmpl, modl; 2153 int tcr, tcra; 2154 2155 if ((qos->txtp.max_pcr == 0) && 2156 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) { 2157 printk("%s: trying to open a CBR VC with cell rate = 0\n", 2158 card->name); 2159 return -EINVAL; 2160 } 2161 2162 tst_used = 0; 2163 tst_free = card->tst_free; 2164 if (test_bit(VCF_TX, &vc->flags)) 2165 tst_used = vc->ntste; 2166 tst_free += tst_used; 2167 2168 tcr = atm_pcr_goal(&qos->txtp); 2169 tcra = tcr >= 0 ? tcr : -tcr; 2170 2171 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra); 2172 2173 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2); 2174 modl = tmpl % (unsigned long)card->utopia_pcr; 2175 2176 tst_entries = (int) (tmpl / card->utopia_pcr); 2177 if (tcr > 0) { 2178 if (modl > 0) 2179 tst_entries++; 2180 } else if (tcr == 0) { 2181 tst_entries = tst_free - SAR_TST_RESERVED; 2182 if (tst_entries <= 0) { 2183 printk("%s: no CBR bandwidth free.\n", card->name); 2184 return -ENOSR; 2185 } 2186 } 2187 2188 if (tst_entries == 0) { 2189 printk("%s: selected CBR bandwidth < granularity.\n", 2190 card->name); 2191 return -EINVAL; 2192 } 2193 2194 if (tst_entries > (tst_free - SAR_TST_RESERVED)) { 2195 printk("%s: not enough CBR bandwidth free.\n", card->name); 2196 return -ENOSR; 2197 } 2198 2199 vc->ntste = tst_entries; 2200 2201 card->tst_free = tst_free - tst_entries; 2202 if (test_bit(VCF_TX, &vc->flags)) { 2203 if (tst_used == tst_entries) 2204 return 0; 2205 2206 OPRINTK("%s: modify %d -> %d entries in TST.\n", 2207 card->name, tst_used, tst_entries); 2208 change_tst(card, vc, tst_entries, TSTE_OPC_CBR); 2209 return 0; 2210 } 2211 2212 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries); 2213 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR); 2214 return 0; 2215 } 2216 2217 static int 2218 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc, 2219 struct atm_vcc *vcc, struct atm_qos *qos) 2220 { 2221 unsigned long flags; 2222 int tcr; 2223 2224 spin_lock_irqsave(&vc->lock, flags); 2225 if (vc->estimator) { 2226 del_timer(&vc->estimator->timer); 2227 kfree(vc->estimator); 2228 vc->estimator = NULL; 2229 } 2230 spin_unlock_irqrestore(&vc->lock, flags); 2231 2232 tcr = atm_pcr_goal(&qos->txtp); 2233 if (tcr == 0) 2234 tcr = card->link_pcr; 2235 2236 vc->estimator = idt77252_init_est(vc, tcr); 2237 2238 vc->class = SCHED_UBR; 2239 vc->init_er = idt77252_rate_logindex(card, tcr); 2240 vc->lacr = vc->init_er; 2241 if (tcr < 0) 2242 vc->max_er = vc->init_er; 2243 else 2244 vc->max_er = 0xff; 2245 2246 return 0; 2247 } 2248 2249 static int 2250 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc, 2251 struct atm_vcc *vcc, struct atm_qos *qos) 2252 { 2253 int error; 2254 2255 if (test_bit(VCF_TX, &vc->flags)) 2256 return -EBUSY; 2257 2258 switch (qos->txtp.traffic_class) { 2259 case ATM_CBR: 2260 vc->class = SCHED_CBR; 2261 break; 2262 2263 case ATM_UBR: 2264 vc->class = SCHED_UBR; 2265 break; 2266 2267 case ATM_VBR: 2268 case ATM_ABR: 2269 default: 2270 return -EPROTONOSUPPORT; 2271 } 2272 2273 vc->scq = alloc_scq(card, vc->class); 2274 if (!vc->scq) { 2275 printk("%s: can't get SCQ.\n", card->name); 2276 return -ENOMEM; 2277 } 2278 2279 vc->scq->scd = get_free_scd(card, vc); 2280 if (vc->scq->scd == 0) { 2281 printk("%s: no SCD available.\n", card->name); 2282 free_scq(card, vc->scq); 2283 return -ENOMEM; 2284 } 2285 2286 fill_scd(card, vc->scq, vc->class); 2287 2288 if (set_tct(card, vc)) { 2289 printk("%s: class %d not supported.\n", 2290 card->name, qos->txtp.traffic_class); 2291 2292 card->scd2vc[vc->scd_index] = NULL; 2293 free_scq(card, vc->scq); 2294 return -EPROTONOSUPPORT; 2295 } 2296 2297 switch (vc->class) { 2298 case SCHED_CBR: 2299 error = idt77252_init_cbr(card, vc, vcc, qos); 2300 if (error) { 2301 card->scd2vc[vc->scd_index] = NULL; 2302 free_scq(card, vc->scq); 2303 return error; 2304 } 2305 2306 clear_bit(VCF_IDLE, &vc->flags); 2307 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ); 2308 break; 2309 2310 case SCHED_UBR: 2311 error = idt77252_init_ubr(card, vc, vcc, qos); 2312 if (error) { 2313 card->scd2vc[vc->scd_index] = NULL; 2314 free_scq(card, vc->scq); 2315 return error; 2316 } 2317 2318 set_bit(VCF_IDLE, &vc->flags); 2319 break; 2320 } 2321 2322 vc->tx_vcc = vcc; 2323 set_bit(VCF_TX, &vc->flags); 2324 return 0; 2325 } 2326 2327 static int 2328 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc, 2329 struct atm_vcc *vcc, struct atm_qos *qos) 2330 { 2331 unsigned long flags; 2332 unsigned long addr; 2333 u32 rcte = 0; 2334 2335 if (test_bit(VCF_RX, &vc->flags)) 2336 return -EBUSY; 2337 2338 vc->rx_vcc = vcc; 2339 set_bit(VCF_RX, &vc->flags); 2340 2341 if ((vcc->vci == 3) || (vcc->vci == 4)) 2342 return 0; 2343 2344 flush_rx_pool(card, &vc->rcv.rx_pool); 2345 2346 rcte |= SAR_RCTE_CONNECTOPEN; 2347 rcte |= SAR_RCTE_RAWCELLINTEN; 2348 2349 switch (qos->aal) { 2350 case ATM_AAL0: 2351 rcte |= SAR_RCTE_RCQ; 2352 break; 2353 case ATM_AAL1: 2354 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */ 2355 break; 2356 case ATM_AAL34: 2357 rcte |= SAR_RCTE_AAL34; 2358 break; 2359 case ATM_AAL5: 2360 rcte |= SAR_RCTE_AAL5; 2361 break; 2362 default: 2363 rcte |= SAR_RCTE_RCQ; 2364 break; 2365 } 2366 2367 if (qos->aal != ATM_AAL5) 2368 rcte |= SAR_RCTE_FBP_1; 2369 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2) 2370 rcte |= SAR_RCTE_FBP_3; 2371 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1) 2372 rcte |= SAR_RCTE_FBP_2; 2373 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0) 2374 rcte |= SAR_RCTE_FBP_1; 2375 else 2376 rcte |= SAR_RCTE_FBP_01; 2377 2378 addr = card->rct_base + (vc->index << 2); 2379 2380 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr); 2381 write_sram(card, addr, rcte); 2382 2383 spin_lock_irqsave(&card->cmd_lock, flags); 2384 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD); 2385 waitfor_idle(card); 2386 spin_unlock_irqrestore(&card->cmd_lock, flags); 2387 2388 return 0; 2389 } 2390 2391 static int 2392 idt77252_open(struct atm_vcc *vcc) 2393 { 2394 struct atm_dev *dev = vcc->dev; 2395 struct idt77252_dev *card = dev->dev_data; 2396 struct vc_map *vc; 2397 unsigned int index; 2398 unsigned int inuse; 2399 int error; 2400 int vci = vcc->vci; 2401 short vpi = vcc->vpi; 2402 2403 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) 2404 return 0; 2405 2406 if (vpi >= (1 << card->vpibits)) { 2407 printk("%s: unsupported VPI: %d\n", card->name, vpi); 2408 return -EINVAL; 2409 } 2410 2411 if (vci >= (1 << card->vcibits)) { 2412 printk("%s: unsupported VCI: %d\n", card->name, vci); 2413 return -EINVAL; 2414 } 2415 2416 set_bit(ATM_VF_ADDR, &vcc->flags); 2417 2418 mutex_lock(&card->mutex); 2419 2420 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci); 2421 2422 switch (vcc->qos.aal) { 2423 case ATM_AAL0: 2424 case ATM_AAL1: 2425 case ATM_AAL5: 2426 break; 2427 default: 2428 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal); 2429 mutex_unlock(&card->mutex); 2430 return -EPROTONOSUPPORT; 2431 } 2432 2433 index = VPCI2VC(card, vpi, vci); 2434 if (!card->vcs[index]) { 2435 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2436 if (!card->vcs[index]) { 2437 printk("%s: can't alloc vc in open()\n", card->name); 2438 mutex_unlock(&card->mutex); 2439 return -ENOMEM; 2440 } 2441 card->vcs[index]->card = card; 2442 card->vcs[index]->index = index; 2443 2444 spin_lock_init(&card->vcs[index]->lock); 2445 } 2446 vc = card->vcs[index]; 2447 2448 vcc->dev_data = vc; 2449 2450 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n", 2451 card->name, vc->index, vcc->vpi, vcc->vci, 2452 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--", 2453 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--", 2454 vcc->qos.rxtp.max_sdu); 2455 2456 inuse = 0; 2457 if (vcc->qos.txtp.traffic_class != ATM_NONE && 2458 test_bit(VCF_TX, &vc->flags)) 2459 inuse = 1; 2460 if (vcc->qos.rxtp.traffic_class != ATM_NONE && 2461 test_bit(VCF_RX, &vc->flags)) 2462 inuse += 2; 2463 2464 if (inuse) { 2465 printk("%s: %s vci already in use.\n", card->name, 2466 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx"); 2467 mutex_unlock(&card->mutex); 2468 return -EADDRINUSE; 2469 } 2470 2471 if (vcc->qos.txtp.traffic_class != ATM_NONE) { 2472 error = idt77252_init_tx(card, vc, vcc, &vcc->qos); 2473 if (error) { 2474 mutex_unlock(&card->mutex); 2475 return error; 2476 } 2477 } 2478 2479 if (vcc->qos.rxtp.traffic_class != ATM_NONE) { 2480 error = idt77252_init_rx(card, vc, vcc, &vcc->qos); 2481 if (error) { 2482 mutex_unlock(&card->mutex); 2483 return error; 2484 } 2485 } 2486 2487 set_bit(ATM_VF_READY, &vcc->flags); 2488 2489 mutex_unlock(&card->mutex); 2490 return 0; 2491 } 2492 2493 static void 2494 idt77252_close(struct atm_vcc *vcc) 2495 { 2496 struct atm_dev *dev = vcc->dev; 2497 struct idt77252_dev *card = dev->dev_data; 2498 struct vc_map *vc = vcc->dev_data; 2499 unsigned long flags; 2500 unsigned long addr; 2501 unsigned long timeout; 2502 2503 mutex_lock(&card->mutex); 2504 2505 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n", 2506 card->name, vc->index, vcc->vpi, vcc->vci); 2507 2508 clear_bit(ATM_VF_READY, &vcc->flags); 2509 2510 if (vcc->qos.rxtp.traffic_class != ATM_NONE) { 2511 2512 spin_lock_irqsave(&vc->lock, flags); 2513 clear_bit(VCF_RX, &vc->flags); 2514 vc->rx_vcc = NULL; 2515 spin_unlock_irqrestore(&vc->lock, flags); 2516 2517 if ((vcc->vci == 3) || (vcc->vci == 4)) 2518 goto done; 2519 2520 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE; 2521 2522 spin_lock_irqsave(&card->cmd_lock, flags); 2523 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD); 2524 waitfor_idle(card); 2525 spin_unlock_irqrestore(&card->cmd_lock, flags); 2526 2527 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) { 2528 DPRINTK("%s: closing a VC with pending rx buffers.\n", 2529 card->name); 2530 2531 recycle_rx_pool_skb(card, &vc->rcv.rx_pool); 2532 } 2533 } 2534 2535 done: 2536 if (vcc->qos.txtp.traffic_class != ATM_NONE) { 2537 2538 spin_lock_irqsave(&vc->lock, flags); 2539 clear_bit(VCF_TX, &vc->flags); 2540 clear_bit(VCF_IDLE, &vc->flags); 2541 clear_bit(VCF_RSV, &vc->flags); 2542 vc->tx_vcc = NULL; 2543 2544 if (vc->estimator) { 2545 del_timer(&vc->estimator->timer); 2546 kfree(vc->estimator); 2547 vc->estimator = NULL; 2548 } 2549 spin_unlock_irqrestore(&vc->lock, flags); 2550 2551 timeout = 5 * 1000; 2552 while (atomic_read(&vc->scq->used) > 0) { 2553 timeout = msleep_interruptible(timeout); 2554 if (!timeout) 2555 break; 2556 } 2557 if (!timeout) 2558 printk("%s: SCQ drain timeout: %u used\n", 2559 card->name, atomic_read(&vc->scq->used)); 2560 2561 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ); 2562 clear_scd(card, vc->scq, vc->class); 2563 2564 if (vc->class == SCHED_CBR) { 2565 clear_tst(card, vc); 2566 card->tst_free += vc->ntste; 2567 vc->ntste = 0; 2568 } 2569 2570 card->scd2vc[vc->scd_index] = NULL; 2571 free_scq(card, vc->scq); 2572 } 2573 2574 mutex_unlock(&card->mutex); 2575 } 2576 2577 static int 2578 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags) 2579 { 2580 struct atm_dev *dev = vcc->dev; 2581 struct idt77252_dev *card = dev->dev_data; 2582 struct vc_map *vc = vcc->dev_data; 2583 int error = 0; 2584 2585 mutex_lock(&card->mutex); 2586 2587 if (qos->txtp.traffic_class != ATM_NONE) { 2588 if (!test_bit(VCF_TX, &vc->flags)) { 2589 error = idt77252_init_tx(card, vc, vcc, qos); 2590 if (error) 2591 goto out; 2592 } else { 2593 switch (qos->txtp.traffic_class) { 2594 case ATM_CBR: 2595 error = idt77252_init_cbr(card, vc, vcc, qos); 2596 if (error) 2597 goto out; 2598 break; 2599 2600 case ATM_UBR: 2601 error = idt77252_init_ubr(card, vc, vcc, qos); 2602 if (error) 2603 goto out; 2604 2605 if (!test_bit(VCF_IDLE, &vc->flags)) { 2606 writel(TCMDQ_LACR | (vc->lacr << 16) | 2607 vc->index, SAR_REG_TCMDQ); 2608 } 2609 break; 2610 2611 case ATM_VBR: 2612 case ATM_ABR: 2613 error = -EOPNOTSUPP; 2614 goto out; 2615 } 2616 } 2617 } 2618 2619 if ((qos->rxtp.traffic_class != ATM_NONE) && 2620 !test_bit(VCF_RX, &vc->flags)) { 2621 error = idt77252_init_rx(card, vc, vcc, qos); 2622 if (error) 2623 goto out; 2624 } 2625 2626 memcpy(&vcc->qos, qos, sizeof(struct atm_qos)); 2627 2628 set_bit(ATM_VF_HASQOS, &vcc->flags); 2629 2630 out: 2631 mutex_unlock(&card->mutex); 2632 return error; 2633 } 2634 2635 static int 2636 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page) 2637 { 2638 struct idt77252_dev *card = dev->dev_data; 2639 int i, left; 2640 2641 left = (int) *pos; 2642 if (!left--) 2643 return sprintf(page, "IDT77252 Interrupts:\n"); 2644 if (!left--) 2645 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]); 2646 if (!left--) 2647 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]); 2648 if (!left--) 2649 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]); 2650 if (!left--) 2651 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]); 2652 if (!left--) 2653 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]); 2654 if (!left--) 2655 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]); 2656 if (!left--) 2657 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]); 2658 if (!left--) 2659 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]); 2660 if (!left--) 2661 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]); 2662 if (!left--) 2663 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]); 2664 if (!left--) 2665 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]); 2666 if (!left--) 2667 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]); 2668 if (!left--) 2669 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]); 2670 if (!left--) 2671 return sprintf(page, "IDT77252 Transmit Connection Table:\n"); 2672 2673 for (i = 0; i < card->tct_size; i++) { 2674 unsigned long tct; 2675 struct atm_vcc *vcc; 2676 struct vc_map *vc; 2677 char *p; 2678 2679 vc = card->vcs[i]; 2680 if (!vc) 2681 continue; 2682 2683 vcc = NULL; 2684 if (vc->tx_vcc) 2685 vcc = vc->tx_vcc; 2686 if (!vcc) 2687 continue; 2688 if (left--) 2689 continue; 2690 2691 p = page; 2692 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci); 2693 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE); 2694 2695 for (i = 0; i < 8; i++) 2696 p += sprintf(p, " %08x", read_sram(card, tct + i)); 2697 p += sprintf(p, "\n"); 2698 return p - page; 2699 } 2700 return 0; 2701 } 2702 2703 /*****************************************************************************/ 2704 /* */ 2705 /* Interrupt handler */ 2706 /* */ 2707 /*****************************************************************************/ 2708 2709 static void 2710 idt77252_collect_stat(struct idt77252_dev *card) 2711 { 2712 u32 cdc, vpec, icc; 2713 2714 cdc = readl(SAR_REG_CDC); 2715 vpec = readl(SAR_REG_VPEC); 2716 icc = readl(SAR_REG_ICC); 2717 2718 #ifdef NOTDEF 2719 printk("%s:", card->name); 2720 2721 if (cdc & 0x7f0000) { 2722 char *s = ""; 2723 2724 printk(" ["); 2725 if (cdc & (1 << 22)) { 2726 printk("%sRM ID", s); 2727 s = " | "; 2728 } 2729 if (cdc & (1 << 21)) { 2730 printk("%sCON TAB", s); 2731 s = " | "; 2732 } 2733 if (cdc & (1 << 20)) { 2734 printk("%sNO FB", s); 2735 s = " | "; 2736 } 2737 if (cdc & (1 << 19)) { 2738 printk("%sOAM CRC", s); 2739 s = " | "; 2740 } 2741 if (cdc & (1 << 18)) { 2742 printk("%sRM CRC", s); 2743 s = " | "; 2744 } 2745 if (cdc & (1 << 17)) { 2746 printk("%sRM FIFO", s); 2747 s = " | "; 2748 } 2749 if (cdc & (1 << 16)) { 2750 printk("%sRX FIFO", s); 2751 s = " | "; 2752 } 2753 printk("]"); 2754 } 2755 2756 printk(" CDC %04x, VPEC %04x, ICC: %04x\n", 2757 cdc & 0xffff, vpec & 0xffff, icc & 0xffff); 2758 #endif 2759 } 2760 2761 static irqreturn_t 2762 idt77252_interrupt(int irq, void *dev_id) 2763 { 2764 struct idt77252_dev *card = dev_id; 2765 u32 stat; 2766 2767 stat = readl(SAR_REG_STAT) & 0xffff; 2768 if (!stat) /* no interrupt for us */ 2769 return IRQ_NONE; 2770 2771 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) { 2772 printk("%s: Re-entering irq_handler()\n", card->name); 2773 goto out; 2774 } 2775 2776 writel(stat, SAR_REG_STAT); /* reset interrupt */ 2777 2778 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */ 2779 INTPRINTK("%s: TSIF\n", card->name); 2780 card->irqstat[15]++; 2781 idt77252_tx(card); 2782 } 2783 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */ 2784 INTPRINTK("%s: TXICP\n", card->name); 2785 card->irqstat[14]++; 2786 #ifdef CONFIG_ATM_IDT77252_DEBUG 2787 idt77252_tx_dump(card); 2788 #endif 2789 } 2790 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */ 2791 INTPRINTK("%s: TSQF\n", card->name); 2792 card->irqstat[12]++; 2793 idt77252_tx(card); 2794 } 2795 if (stat & SAR_STAT_TMROF) { /* Timer overflow */ 2796 INTPRINTK("%s: TMROF\n", card->name); 2797 card->irqstat[11]++; 2798 idt77252_collect_stat(card); 2799 } 2800 2801 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */ 2802 INTPRINTK("%s: EPDU\n", card->name); 2803 card->irqstat[5]++; 2804 idt77252_rx(card); 2805 } 2806 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */ 2807 INTPRINTK("%s: RSQAF\n", card->name); 2808 card->irqstat[1]++; 2809 idt77252_rx(card); 2810 } 2811 if (stat & SAR_STAT_RSQF) { /* RSQ is full */ 2812 INTPRINTK("%s: RSQF\n", card->name); 2813 card->irqstat[6]++; 2814 idt77252_rx(card); 2815 } 2816 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */ 2817 INTPRINTK("%s: RAWCF\n", card->name); 2818 card->irqstat[4]++; 2819 idt77252_rx_raw(card); 2820 } 2821 2822 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */ 2823 INTPRINTK("%s: PHYI", card->name); 2824 card->irqstat[10]++; 2825 if (card->atmdev->phy && card->atmdev->phy->interrupt) 2826 card->atmdev->phy->interrupt(card->atmdev); 2827 } 2828 2829 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A | 2830 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) { 2831 2832 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG); 2833 2834 INTPRINTK("%s: FBQA: %04x\n", card->name, stat); 2835 2836 if (stat & SAR_STAT_FBQ0A) 2837 card->irqstat[2]++; 2838 if (stat & SAR_STAT_FBQ1A) 2839 card->irqstat[3]++; 2840 if (stat & SAR_STAT_FBQ2A) 2841 card->irqstat[7]++; 2842 if (stat & SAR_STAT_FBQ3A) 2843 card->irqstat[8]++; 2844 2845 schedule_work(&card->tqueue); 2846 } 2847 2848 out: 2849 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags); 2850 return IRQ_HANDLED; 2851 } 2852 2853 static void 2854 idt77252_softint(struct work_struct *work) 2855 { 2856 struct idt77252_dev *card = 2857 container_of(work, struct idt77252_dev, tqueue); 2858 u32 stat; 2859 int done; 2860 2861 for (done = 1; ; done = 1) { 2862 stat = readl(SAR_REG_STAT) >> 16; 2863 2864 if ((stat & 0x0f) < SAR_FBQ0_HIGH) { 2865 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32); 2866 done = 0; 2867 } 2868 2869 stat >>= 4; 2870 if ((stat & 0x0f) < SAR_FBQ1_HIGH) { 2871 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32); 2872 done = 0; 2873 } 2874 2875 stat >>= 4; 2876 if ((stat & 0x0f) < SAR_FBQ2_HIGH) { 2877 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32); 2878 done = 0; 2879 } 2880 2881 stat >>= 4; 2882 if ((stat & 0x0f) < SAR_FBQ3_HIGH) { 2883 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32); 2884 done = 0; 2885 } 2886 2887 if (done) 2888 break; 2889 } 2890 2891 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG); 2892 } 2893 2894 2895 static int 2896 open_card_oam(struct idt77252_dev *card) 2897 { 2898 unsigned long flags; 2899 unsigned long addr; 2900 struct vc_map *vc; 2901 int vpi, vci; 2902 int index; 2903 u32 rcte; 2904 2905 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) { 2906 for (vci = 3; vci < 5; vci++) { 2907 index = VPCI2VC(card, vpi, vci); 2908 2909 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2910 if (!vc) { 2911 printk("%s: can't alloc vc\n", card->name); 2912 return -ENOMEM; 2913 } 2914 vc->index = index; 2915 card->vcs[index] = vc; 2916 2917 flush_rx_pool(card, &vc->rcv.rx_pool); 2918 2919 rcte = SAR_RCTE_CONNECTOPEN | 2920 SAR_RCTE_RAWCELLINTEN | 2921 SAR_RCTE_RCQ | 2922 SAR_RCTE_FBP_1; 2923 2924 addr = card->rct_base + (vc->index << 2); 2925 write_sram(card, addr, rcte); 2926 2927 spin_lock_irqsave(&card->cmd_lock, flags); 2928 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), 2929 SAR_REG_CMD); 2930 waitfor_idle(card); 2931 spin_unlock_irqrestore(&card->cmd_lock, flags); 2932 } 2933 } 2934 2935 return 0; 2936 } 2937 2938 static void 2939 close_card_oam(struct idt77252_dev *card) 2940 { 2941 unsigned long flags; 2942 unsigned long addr; 2943 struct vc_map *vc; 2944 int vpi, vci; 2945 int index; 2946 2947 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) { 2948 for (vci = 3; vci < 5; vci++) { 2949 index = VPCI2VC(card, vpi, vci); 2950 vc = card->vcs[index]; 2951 2952 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE; 2953 2954 spin_lock_irqsave(&card->cmd_lock, flags); 2955 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), 2956 SAR_REG_CMD); 2957 waitfor_idle(card); 2958 spin_unlock_irqrestore(&card->cmd_lock, flags); 2959 2960 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) { 2961 DPRINTK("%s: closing a VC " 2962 "with pending rx buffers.\n", 2963 card->name); 2964 2965 recycle_rx_pool_skb(card, &vc->rcv.rx_pool); 2966 } 2967 } 2968 } 2969 } 2970 2971 static int 2972 open_card_ubr0(struct idt77252_dev *card) 2973 { 2974 struct vc_map *vc; 2975 2976 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2977 if (!vc) { 2978 printk("%s: can't alloc vc\n", card->name); 2979 return -ENOMEM; 2980 } 2981 card->vcs[0] = vc; 2982 vc->class = SCHED_UBR0; 2983 2984 vc->scq = alloc_scq(card, vc->class); 2985 if (!vc->scq) { 2986 printk("%s: can't get SCQ.\n", card->name); 2987 return -ENOMEM; 2988 } 2989 2990 card->scd2vc[0] = vc; 2991 vc->scd_index = 0; 2992 vc->scq->scd = card->scd_base; 2993 2994 fill_scd(card, vc->scq, vc->class); 2995 2996 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base); 2997 write_sram(card, card->tct_base + 1, 0); 2998 write_sram(card, card->tct_base + 2, 0); 2999 write_sram(card, card->tct_base + 3, 0); 3000 write_sram(card, card->tct_base + 4, 0); 3001 write_sram(card, card->tct_base + 5, 0); 3002 write_sram(card, card->tct_base + 6, 0); 3003 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR); 3004 3005 clear_bit(VCF_IDLE, &vc->flags); 3006 writel(TCMDQ_START | 0, SAR_REG_TCMDQ); 3007 return 0; 3008 } 3009 3010 static int 3011 idt77252_dev_open(struct idt77252_dev *card) 3012 { 3013 u32 conf; 3014 3015 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) { 3016 printk("%s: SAR not yet initialized.\n", card->name); 3017 return -1; 3018 } 3019 3020 conf = SAR_CFG_RXPTH| /* enable receive path */ 3021 SAR_RX_DELAY | /* interrupt on complete PDU */ 3022 SAR_CFG_RAWIE | /* interrupt enable on raw cells */ 3023 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */ 3024 SAR_CFG_TMOIE | /* interrupt on timer overflow */ 3025 SAR_CFG_FBIE | /* interrupt on low free buffers */ 3026 SAR_CFG_TXEN | /* transmit operation enable */ 3027 SAR_CFG_TXINT | /* interrupt on transmit status */ 3028 SAR_CFG_TXUIE | /* interrupt on transmit underrun */ 3029 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */ 3030 SAR_CFG_PHYIE /* enable PHY interrupts */ 3031 ; 3032 3033 #ifdef CONFIG_ATM_IDT77252_RCV_ALL 3034 /* Test RAW cell receive. */ 3035 conf |= SAR_CFG_VPECA; 3036 #endif 3037 3038 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG); 3039 3040 if (open_card_oam(card)) { 3041 printk("%s: Error initializing OAM.\n", card->name); 3042 return -1; 3043 } 3044 3045 if (open_card_ubr0(card)) { 3046 printk("%s: Error initializing UBR0.\n", card->name); 3047 return -1; 3048 } 3049 3050 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name); 3051 return 0; 3052 } 3053 3054 static void idt77252_dev_close(struct atm_dev *dev) 3055 { 3056 struct idt77252_dev *card = dev->dev_data; 3057 u32 conf; 3058 3059 close_card_oam(card); 3060 3061 conf = SAR_CFG_RXPTH | /* enable receive path */ 3062 SAR_RX_DELAY | /* interrupt on complete PDU */ 3063 SAR_CFG_RAWIE | /* interrupt enable on raw cells */ 3064 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */ 3065 SAR_CFG_TMOIE | /* interrupt on timer overflow */ 3066 SAR_CFG_FBIE | /* interrupt on low free buffers */ 3067 SAR_CFG_TXEN | /* transmit operation enable */ 3068 SAR_CFG_TXINT | /* interrupt on transmit status */ 3069 SAR_CFG_TXUIE | /* interrupt on xmit underrun */ 3070 SAR_CFG_TXSFI /* interrupt on TSQ almost full */ 3071 ; 3072 3073 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG); 3074 3075 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name); 3076 } 3077 3078 3079 /*****************************************************************************/ 3080 /* */ 3081 /* Initialisation and Deinitialization of IDT77252 */ 3082 /* */ 3083 /*****************************************************************************/ 3084 3085 3086 static void 3087 deinit_card(struct idt77252_dev *card) 3088 { 3089 struct sk_buff *skb; 3090 int i, j; 3091 3092 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) { 3093 printk("%s: SAR not yet initialized.\n", card->name); 3094 return; 3095 } 3096 DIPRINTK("idt77252: deinitialize card %u\n", card->index); 3097 3098 writel(0, SAR_REG_CFG); 3099 3100 if (card->atmdev) 3101 atm_dev_deregister(card->atmdev); 3102 3103 for (i = 0; i < 4; i++) { 3104 for (j = 0; j < FBQ_SIZE; j++) { 3105 skb = card->sbpool[i].skb[j]; 3106 if (skb) { 3107 pci_unmap_single(card->pcidev, 3108 IDT77252_PRV_PADDR(skb), 3109 (skb_end_pointer(skb) - 3110 skb->data), 3111 PCI_DMA_FROMDEVICE); 3112 card->sbpool[i].skb[j] = NULL; 3113 dev_kfree_skb(skb); 3114 } 3115 } 3116 } 3117 3118 vfree(card->soft_tst); 3119 3120 vfree(card->scd2vc); 3121 3122 vfree(card->vcs); 3123 3124 if (card->raw_cell_hnd) { 3125 pci_free_consistent(card->pcidev, 2 * sizeof(u32), 3126 card->raw_cell_hnd, card->raw_cell_paddr); 3127 } 3128 3129 if (card->rsq.base) { 3130 DIPRINTK("%s: Release RSQ ...\n", card->name); 3131 deinit_rsq(card); 3132 } 3133 3134 if (card->tsq.base) { 3135 DIPRINTK("%s: Release TSQ ...\n", card->name); 3136 deinit_tsq(card); 3137 } 3138 3139 DIPRINTK("idt77252: Release IRQ.\n"); 3140 free_irq(card->pcidev->irq, card); 3141 3142 for (i = 0; i < 4; i++) { 3143 if (card->fbq[i]) 3144 iounmap(card->fbq[i]); 3145 } 3146 3147 if (card->membase) 3148 iounmap(card->membase); 3149 3150 clear_bit(IDT77252_BIT_INIT, &card->flags); 3151 DIPRINTK("%s: Card deinitialized.\n", card->name); 3152 } 3153 3154 3155 static int __devinit 3156 init_sram(struct idt77252_dev *card) 3157 { 3158 int i; 3159 3160 for (i = 0; i < card->sramsize; i += 4) 3161 write_sram(card, (i >> 2), 0); 3162 3163 /* set SRAM layout for THIS card */ 3164 if (card->sramsize == (512 * 1024)) { 3165 card->tct_base = SAR_SRAM_TCT_128_BASE; 3166 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1) 3167 / SAR_SRAM_TCT_SIZE; 3168 card->rct_base = SAR_SRAM_RCT_128_BASE; 3169 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1) 3170 / SAR_SRAM_RCT_SIZE; 3171 card->rt_base = SAR_SRAM_RT_128_BASE; 3172 card->scd_base = SAR_SRAM_SCD_128_BASE; 3173 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1) 3174 / SAR_SRAM_SCD_SIZE; 3175 card->tst[0] = SAR_SRAM_TST1_128_BASE; 3176 card->tst[1] = SAR_SRAM_TST2_128_BASE; 3177 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1; 3178 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE; 3179 card->abrst_size = SAR_ABRSTD_SIZE_8K; 3180 card->fifo_base = SAR_SRAM_FIFO_128_BASE; 3181 card->fifo_size = SAR_RXFD_SIZE_32K; 3182 } else { 3183 card->tct_base = SAR_SRAM_TCT_32_BASE; 3184 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1) 3185 / SAR_SRAM_TCT_SIZE; 3186 card->rct_base = SAR_SRAM_RCT_32_BASE; 3187 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1) 3188 / SAR_SRAM_RCT_SIZE; 3189 card->rt_base = SAR_SRAM_RT_32_BASE; 3190 card->scd_base = SAR_SRAM_SCD_32_BASE; 3191 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1) 3192 / SAR_SRAM_SCD_SIZE; 3193 card->tst[0] = SAR_SRAM_TST1_32_BASE; 3194 card->tst[1] = SAR_SRAM_TST2_32_BASE; 3195 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1); 3196 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE; 3197 card->abrst_size = SAR_ABRSTD_SIZE_1K; 3198 card->fifo_base = SAR_SRAM_FIFO_32_BASE; 3199 card->fifo_size = SAR_RXFD_SIZE_4K; 3200 } 3201 3202 /* Initialize TCT */ 3203 for (i = 0; i < card->tct_size; i++) { 3204 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0); 3205 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0); 3206 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0); 3207 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0); 3208 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0); 3209 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0); 3210 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0); 3211 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0); 3212 } 3213 3214 /* Initialize RCT */ 3215 for (i = 0; i < card->rct_size; i++) { 3216 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE, 3217 (u32) SAR_RCTE_RAWCELLINTEN); 3218 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1, 3219 (u32) 0); 3220 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2, 3221 (u32) 0); 3222 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3, 3223 (u32) 0xffffffff); 3224 } 3225 3226 writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 | 3227 (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0); 3228 writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 | 3229 (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1); 3230 writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 | 3231 (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2); 3232 writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 | 3233 (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3); 3234 3235 /* Initialize rate table */ 3236 for (i = 0; i < 256; i++) { 3237 write_sram(card, card->rt_base + i, log_to_rate[i]); 3238 } 3239 3240 for (i = 0; i < 128; i++) { 3241 unsigned int tmp; 3242 3243 tmp = rate_to_log[(i << 2) + 0] << 0; 3244 tmp |= rate_to_log[(i << 2) + 1] << 8; 3245 tmp |= rate_to_log[(i << 2) + 2] << 16; 3246 tmp |= rate_to_log[(i << 2) + 3] << 24; 3247 write_sram(card, card->rt_base + 256 + i, tmp); 3248 } 3249 3250 #if 0 /* Fill RDF and AIR tables. */ 3251 for (i = 0; i < 128; i++) { 3252 unsigned int tmp; 3253 3254 tmp = RDF[0][(i << 1) + 0] << 16; 3255 tmp |= RDF[0][(i << 1) + 1] << 0; 3256 write_sram(card, card->rt_base + 512 + i, tmp); 3257 } 3258 3259 for (i = 0; i < 128; i++) { 3260 unsigned int tmp; 3261 3262 tmp = AIR[0][(i << 1) + 0] << 16; 3263 tmp |= AIR[0][(i << 1) + 1] << 0; 3264 write_sram(card, card->rt_base + 640 + i, tmp); 3265 } 3266 #endif 3267 3268 IPRINTK("%s: initialize rate table ...\n", card->name); 3269 writel(card->rt_base << 2, SAR_REG_RTBL); 3270 3271 /* Initialize TSTs */ 3272 IPRINTK("%s: initialize TST ...\n", card->name); 3273 card->tst_free = card->tst_size - 2; /* last two are jumps */ 3274 3275 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++) 3276 write_sram(card, i, TSTE_OPC_VAR); 3277 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2)); 3278 idt77252_sram_write_errors = 1; 3279 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2)); 3280 idt77252_sram_write_errors = 0; 3281 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++) 3282 write_sram(card, i, TSTE_OPC_VAR); 3283 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2)); 3284 idt77252_sram_write_errors = 1; 3285 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2)); 3286 idt77252_sram_write_errors = 0; 3287 3288 card->tst_index = 0; 3289 writel(card->tst[0] << 2, SAR_REG_TSTB); 3290 3291 /* Initialize ABRSTD and Receive FIFO */ 3292 IPRINTK("%s: initialize ABRSTD ...\n", card->name); 3293 writel(card->abrst_size | (card->abrst_base << 2), 3294 SAR_REG_ABRSTD); 3295 3296 IPRINTK("%s: initialize receive fifo ...\n", card->name); 3297 writel(card->fifo_size | (card->fifo_base << 2), 3298 SAR_REG_RXFD); 3299 3300 IPRINTK("%s: SRAM initialization complete.\n", card->name); 3301 return 0; 3302 } 3303 3304 static int __devinit 3305 init_card(struct atm_dev *dev) 3306 { 3307 struct idt77252_dev *card = dev->dev_data; 3308 struct pci_dev *pcidev = card->pcidev; 3309 unsigned long tmpl, modl; 3310 unsigned int linkrate, rsvdcr; 3311 unsigned int tst_entries; 3312 struct net_device *tmp; 3313 char tname[10]; 3314 3315 u32 size; 3316 u_char pci_byte; 3317 u32 conf; 3318 int i, k; 3319 3320 if (test_bit(IDT77252_BIT_INIT, &card->flags)) { 3321 printk("Error: SAR already initialized.\n"); 3322 return -1; 3323 } 3324 3325 /*****************************************************************/ 3326 /* P C I C O N F I G U R A T I O N */ 3327 /*****************************************************************/ 3328 3329 /* Set PCI Retry-Timeout and TRDY timeout */ 3330 IPRINTK("%s: Checking PCI retries.\n", card->name); 3331 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) { 3332 printk("%s: can't read PCI retry timeout.\n", card->name); 3333 deinit_card(card); 3334 return -1; 3335 } 3336 if (pci_byte != 0) { 3337 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n", 3338 card->name, pci_byte); 3339 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) { 3340 printk("%s: can't set PCI retry timeout.\n", 3341 card->name); 3342 deinit_card(card); 3343 return -1; 3344 } 3345 } 3346 IPRINTK("%s: Checking PCI TRDY.\n", card->name); 3347 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) { 3348 printk("%s: can't read PCI TRDY timeout.\n", card->name); 3349 deinit_card(card); 3350 return -1; 3351 } 3352 if (pci_byte != 0) { 3353 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n", 3354 card->name, pci_byte); 3355 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) { 3356 printk("%s: can't set PCI TRDY timeout.\n", card->name); 3357 deinit_card(card); 3358 return -1; 3359 } 3360 } 3361 /* Reset Timer register */ 3362 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) { 3363 printk("%s: resetting timer overflow.\n", card->name); 3364 writel(SAR_STAT_TMROF, SAR_REG_STAT); 3365 } 3366 IPRINTK("%s: Request IRQ ... ", card->name); 3367 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_DISABLED|IRQF_SHARED, 3368 card->name, card) != 0) { 3369 printk("%s: can't allocate IRQ.\n", card->name); 3370 deinit_card(card); 3371 return -1; 3372 } 3373 IPRINTK("got %d.\n", pcidev->irq); 3374 3375 /*****************************************************************/ 3376 /* C H E C K A N D I N I T S R A M */ 3377 /*****************************************************************/ 3378 3379 IPRINTK("%s: Initializing SRAM\n", card->name); 3380 3381 /* preset size of connecton table, so that init_sram() knows about it */ 3382 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */ 3383 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */ 3384 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */ 3385 #ifndef ATM_IDT77252_SEND_IDLE 3386 SAR_CFG_NO_IDLE | /* Do not send idle cells */ 3387 #endif 3388 0; 3389 3390 if (card->sramsize == (512 * 1024)) 3391 conf |= SAR_CFG_CNTBL_1k; 3392 else 3393 conf |= SAR_CFG_CNTBL_512; 3394 3395 switch (vpibits) { 3396 case 0: 3397 conf |= SAR_CFG_VPVCS_0; 3398 break; 3399 default: 3400 case 1: 3401 conf |= SAR_CFG_VPVCS_1; 3402 break; 3403 case 2: 3404 conf |= SAR_CFG_VPVCS_2; 3405 break; 3406 case 8: 3407 conf |= SAR_CFG_VPVCS_8; 3408 break; 3409 } 3410 3411 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG); 3412 3413 if (init_sram(card) < 0) 3414 return -1; 3415 3416 /********************************************************************/ 3417 /* A L L O C R A M A N D S E T V A R I O U S T H I N G S */ 3418 /********************************************************************/ 3419 /* Initialize TSQ */ 3420 if (0 != init_tsq(card)) { 3421 deinit_card(card); 3422 return -1; 3423 } 3424 /* Initialize RSQ */ 3425 if (0 != init_rsq(card)) { 3426 deinit_card(card); 3427 return -1; 3428 } 3429 3430 card->vpibits = vpibits; 3431 if (card->sramsize == (512 * 1024)) { 3432 card->vcibits = 10 - card->vpibits; 3433 } else { 3434 card->vcibits = 9 - card->vpibits; 3435 } 3436 3437 card->vcimask = 0; 3438 for (k = 0, i = 1; k < card->vcibits; k++) { 3439 card->vcimask |= i; 3440 i <<= 1; 3441 } 3442 3443 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name); 3444 writel(0, SAR_REG_VPM); 3445 3446 /* Little Endian Order */ 3447 writel(0, SAR_REG_GP); 3448 3449 /* Initialize RAW Cell Handle Register */ 3450 card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32), 3451 &card->raw_cell_paddr); 3452 if (!card->raw_cell_hnd) { 3453 printk("%s: memory allocation failure.\n", card->name); 3454 deinit_card(card); 3455 return -1; 3456 } 3457 memset(card->raw_cell_hnd, 0, 2 * sizeof(u32)); 3458 writel(card->raw_cell_paddr, SAR_REG_RAWHND); 3459 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name, 3460 card->raw_cell_hnd); 3461 3462 size = sizeof(struct vc_map *) * card->tct_size; 3463 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size); 3464 if (NULL == (card->vcs = vmalloc(size))) { 3465 printk("%s: memory allocation failure.\n", card->name); 3466 deinit_card(card); 3467 return -1; 3468 } 3469 memset(card->vcs, 0, size); 3470 3471 size = sizeof(struct vc_map *) * card->scd_size; 3472 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n", 3473 card->name, size); 3474 if (NULL == (card->scd2vc = vmalloc(size))) { 3475 printk("%s: memory allocation failure.\n", card->name); 3476 deinit_card(card); 3477 return -1; 3478 } 3479 memset(card->scd2vc, 0, size); 3480 3481 size = sizeof(struct tst_info) * (card->tst_size - 2); 3482 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n", 3483 card->name, size); 3484 if (NULL == (card->soft_tst = vmalloc(size))) { 3485 printk("%s: memory allocation failure.\n", card->name); 3486 deinit_card(card); 3487 return -1; 3488 } 3489 for (i = 0; i < card->tst_size - 2; i++) { 3490 card->soft_tst[i].tste = TSTE_OPC_VAR; 3491 card->soft_tst[i].vc = NULL; 3492 } 3493 3494 if (dev->phy == NULL) { 3495 printk("%s: No LT device defined.\n", card->name); 3496 deinit_card(card); 3497 return -1; 3498 } 3499 if (dev->phy->ioctl == NULL) { 3500 printk("%s: LT had no IOCTL funtion defined.\n", card->name); 3501 deinit_card(card); 3502 return -1; 3503 } 3504 3505 #ifdef CONFIG_ATM_IDT77252_USE_SUNI 3506 /* 3507 * this is a jhs hack to get around special functionality in the 3508 * phy driver for the atecom hardware; the functionality doesn't 3509 * exist in the linux atm suni driver 3510 * 3511 * it isn't the right way to do things, but as the guy from NIST 3512 * said, talking about their measurement of the fine structure 3513 * constant, "it's good enough for government work." 3514 */ 3515 linkrate = 149760000; 3516 #endif 3517 3518 card->link_pcr = (linkrate / 8 / 53); 3519 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n", 3520 card->name, linkrate, card->link_pcr); 3521 3522 #ifdef ATM_IDT77252_SEND_IDLE 3523 card->utopia_pcr = card->link_pcr; 3524 #else 3525 card->utopia_pcr = (160000000 / 8 / 54); 3526 #endif 3527 3528 rsvdcr = 0; 3529 if (card->utopia_pcr > card->link_pcr) 3530 rsvdcr = card->utopia_pcr - card->link_pcr; 3531 3532 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2); 3533 modl = tmpl % (unsigned long)card->utopia_pcr; 3534 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr); 3535 if (modl) 3536 tst_entries++; 3537 card->tst_free -= tst_entries; 3538 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL); 3539 3540 #ifdef HAVE_EEPROM 3541 idt77252_eeprom_init(card); 3542 printk("%s: EEPROM: %02x:", card->name, 3543 idt77252_eeprom_read_status(card)); 3544 3545 for (i = 0; i < 0x80; i++) { 3546 printk(" %02x", 3547 idt77252_eeprom_read_byte(card, i) 3548 ); 3549 } 3550 printk("\n"); 3551 #endif /* HAVE_EEPROM */ 3552 3553 /* 3554 * XXX: <hack> 3555 */ 3556 sprintf(tname, "eth%d", card->index); 3557 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */ 3558 if (tmp) { 3559 memcpy(card->atmdev->esi, tmp->dev_addr, 6); 3560 3561 printk("%s: ESI %pM\n", card->name, card->atmdev->esi); 3562 } 3563 /* 3564 * XXX: </hack> 3565 */ 3566 3567 /* Set Maximum Deficit Count for now. */ 3568 writel(0xffff, SAR_REG_MDFCT); 3569 3570 set_bit(IDT77252_BIT_INIT, &card->flags); 3571 3572 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name); 3573 return 0; 3574 } 3575 3576 3577 /*****************************************************************************/ 3578 /* */ 3579 /* Probing of IDT77252 ABR SAR */ 3580 /* */ 3581 /*****************************************************************************/ 3582 3583 3584 static int __devinit 3585 idt77252_preset(struct idt77252_dev *card) 3586 { 3587 u16 pci_command; 3588 3589 /*****************************************************************/ 3590 /* P C I C O N F I G U R A T I O N */ 3591 /*****************************************************************/ 3592 3593 XPRINTK("%s: Enable PCI master and memory access for SAR.\n", 3594 card->name); 3595 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) { 3596 printk("%s: can't read PCI_COMMAND.\n", card->name); 3597 deinit_card(card); 3598 return -1; 3599 } 3600 if (!(pci_command & PCI_COMMAND_IO)) { 3601 printk("%s: PCI_COMMAND: %04x (???)\n", 3602 card->name, pci_command); 3603 deinit_card(card); 3604 return (-1); 3605 } 3606 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 3607 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) { 3608 printk("%s: can't write PCI_COMMAND.\n", card->name); 3609 deinit_card(card); 3610 return -1; 3611 } 3612 /*****************************************************************/ 3613 /* G E N E R I C R E S E T */ 3614 /*****************************************************************/ 3615 3616 /* Software reset */ 3617 writel(SAR_CFG_SWRST, SAR_REG_CFG); 3618 mdelay(1); 3619 writel(0, SAR_REG_CFG); 3620 3621 IPRINTK("%s: Software resetted.\n", card->name); 3622 return 0; 3623 } 3624 3625 3626 static unsigned long __devinit 3627 probe_sram(struct idt77252_dev *card) 3628 { 3629 u32 data, addr; 3630 3631 writel(0, SAR_REG_DR0); 3632 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD); 3633 3634 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) { 3635 writel(ATM_POISON, SAR_REG_DR0); 3636 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD); 3637 3638 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD); 3639 data = readl(SAR_REG_DR0); 3640 3641 if (data != 0) 3642 break; 3643 } 3644 3645 return addr * sizeof(u32); 3646 } 3647 3648 static int __devinit 3649 idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id) 3650 { 3651 static struct idt77252_dev **last = &idt77252_chain; 3652 static int index = 0; 3653 3654 unsigned long membase, srambase; 3655 struct idt77252_dev *card; 3656 struct atm_dev *dev; 3657 int i, err; 3658 3659 3660 if ((err = pci_enable_device(pcidev))) { 3661 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev)); 3662 return err; 3663 } 3664 3665 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL); 3666 if (!card) { 3667 printk("idt77252-%d: can't allocate private data\n", index); 3668 err = -ENOMEM; 3669 goto err_out_disable_pdev; 3670 } 3671 card->revision = pcidev->revision; 3672 card->index = index; 3673 card->pcidev = pcidev; 3674 sprintf(card->name, "idt77252-%d", card->index); 3675 3676 INIT_WORK(&card->tqueue, idt77252_softint); 3677 3678 membase = pci_resource_start(pcidev, 1); 3679 srambase = pci_resource_start(pcidev, 2); 3680 3681 mutex_init(&card->mutex); 3682 spin_lock_init(&card->cmd_lock); 3683 spin_lock_init(&card->tst_lock); 3684 3685 init_timer(&card->tst_timer); 3686 card->tst_timer.data = (unsigned long)card; 3687 card->tst_timer.function = tst_timer; 3688 3689 /* Do the I/O remapping... */ 3690 card->membase = ioremap(membase, 1024); 3691 if (!card->membase) { 3692 printk("%s: can't ioremap() membase\n", card->name); 3693 err = -EIO; 3694 goto err_out_free_card; 3695 } 3696 3697 if (idt77252_preset(card)) { 3698 printk("%s: preset failed\n", card->name); 3699 err = -EIO; 3700 goto err_out_iounmap; 3701 } 3702 3703 dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL); 3704 if (!dev) { 3705 printk("%s: can't register atm device\n", card->name); 3706 err = -EIO; 3707 goto err_out_iounmap; 3708 } 3709 dev->dev_data = card; 3710 card->atmdev = dev; 3711 3712 #ifdef CONFIG_ATM_IDT77252_USE_SUNI 3713 suni_init(dev); 3714 if (!dev->phy) { 3715 printk("%s: can't init SUNI\n", card->name); 3716 err = -EIO; 3717 goto err_out_deinit_card; 3718 } 3719 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */ 3720 3721 card->sramsize = probe_sram(card); 3722 3723 for (i = 0; i < 4; i++) { 3724 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4); 3725 if (!card->fbq[i]) { 3726 printk("%s: can't ioremap() FBQ%d\n", card->name, i); 3727 err = -EIO; 3728 goto err_out_deinit_card; 3729 } 3730 } 3731 3732 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n", 3733 card->name, ((card->revision > 1) && (card->revision < 25)) ? 3734 'A' + card->revision - 1 : '?', membase, srambase, 3735 card->sramsize / 1024); 3736 3737 if (init_card(dev)) { 3738 printk("%s: init_card failed\n", card->name); 3739 err = -EIO; 3740 goto err_out_deinit_card; 3741 } 3742 3743 dev->ci_range.vpi_bits = card->vpibits; 3744 dev->ci_range.vci_bits = card->vcibits; 3745 dev->link_rate = card->link_pcr; 3746 3747 if (dev->phy->start) 3748 dev->phy->start(dev); 3749 3750 if (idt77252_dev_open(card)) { 3751 printk("%s: dev_open failed\n", card->name); 3752 err = -EIO; 3753 goto err_out_stop; 3754 } 3755 3756 *last = card; 3757 last = &card->next; 3758 index++; 3759 3760 return 0; 3761 3762 err_out_stop: 3763 if (dev->phy->stop) 3764 dev->phy->stop(dev); 3765 3766 err_out_deinit_card: 3767 deinit_card(card); 3768 3769 err_out_iounmap: 3770 iounmap(card->membase); 3771 3772 err_out_free_card: 3773 kfree(card); 3774 3775 err_out_disable_pdev: 3776 pci_disable_device(pcidev); 3777 return err; 3778 } 3779 3780 static struct pci_device_id idt77252_pci_tbl[] = 3781 { 3782 { PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252, 3783 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 3784 { 0, } 3785 }; 3786 3787 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl); 3788 3789 static struct pci_driver idt77252_driver = { 3790 .name = "idt77252", 3791 .id_table = idt77252_pci_tbl, 3792 .probe = idt77252_init_one, 3793 }; 3794 3795 static int __init idt77252_init(void) 3796 { 3797 struct sk_buff *skb; 3798 3799 printk("%s: at %p\n", __func__, idt77252_init); 3800 3801 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) + 3802 sizeof(struct idt77252_skb_prv)) { 3803 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n", 3804 __func__, (unsigned long) sizeof(skb->cb), 3805 (unsigned long) sizeof(struct atm_skb_data) + 3806 sizeof(struct idt77252_skb_prv)); 3807 return -EIO; 3808 } 3809 3810 return pci_register_driver(&idt77252_driver); 3811 } 3812 3813 static void __exit idt77252_exit(void) 3814 { 3815 struct idt77252_dev *card; 3816 struct atm_dev *dev; 3817 3818 pci_unregister_driver(&idt77252_driver); 3819 3820 while (idt77252_chain) { 3821 card = idt77252_chain; 3822 dev = card->atmdev; 3823 idt77252_chain = card->next; 3824 3825 if (dev->phy->stop) 3826 dev->phy->stop(dev); 3827 deinit_card(card); 3828 pci_disable_device(card->pcidev); 3829 kfree(card); 3830 } 3831 3832 DIPRINTK("idt77252: finished cleanup-module().\n"); 3833 } 3834 3835 module_init(idt77252_init); 3836 module_exit(idt77252_exit); 3837 3838 MODULE_LICENSE("GPL"); 3839 3840 module_param(vpibits, uint, 0); 3841 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)"); 3842 #ifdef CONFIG_ATM_IDT77252_DEBUG 3843 module_param(debug, ulong, 0644); 3844 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h"); 3845 #endif 3846 3847 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>"); 3848 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver"); 3849