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/interrupt.h> 41 #include <linux/bitops.h> 42 #include <linux/wait.h> 43 #include <linux/jiffies.h> 44 #include <linux/mutex.h> 45 #include <linux/slab.h> 46 47 #include <asm/io.h> 48 #include <linux/uaccess.h> 49 #include <linux/atomic.h> 50 #include <asm/byteorder.h> 51 52 #ifdef CONFIG_ATM_IDT77252_USE_SUNI 53 #include "suni.h" 54 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */ 55 56 57 #include "idt77252.h" 58 #include "idt77252_tables.h" 59 60 static unsigned int vpibits = 1; 61 62 63 #define ATM_IDT77252_SEND_IDLE 1 64 65 66 /* 67 * Debug HACKs. 68 */ 69 #define DEBUG_MODULE 1 70 #undef HAVE_EEPROM /* does not work, yet. */ 71 72 #ifdef CONFIG_ATM_IDT77252_DEBUG 73 static unsigned long debug = DBG_GENERAL; 74 #endif 75 76 77 #define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY) 78 79 80 /* 81 * SCQ Handling. 82 */ 83 static struct scq_info *alloc_scq(struct idt77252_dev *, int); 84 static void free_scq(struct idt77252_dev *, struct scq_info *); 85 static int queue_skb(struct idt77252_dev *, struct vc_map *, 86 struct sk_buff *, int oam); 87 static void drain_scq(struct idt77252_dev *, struct vc_map *); 88 static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *); 89 static void fill_scd(struct idt77252_dev *, struct scq_info *, int); 90 91 /* 92 * FBQ Handling. 93 */ 94 static int push_rx_skb(struct idt77252_dev *, 95 struct sk_buff *, int queue); 96 static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *); 97 static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *); 98 static void recycle_rx_pool_skb(struct idt77252_dev *, 99 struct rx_pool *); 100 static void add_rx_skb(struct idt77252_dev *, int queue, 101 unsigned int size, unsigned int count); 102 103 /* 104 * RSQ Handling. 105 */ 106 static int init_rsq(struct idt77252_dev *); 107 static void deinit_rsq(struct idt77252_dev *); 108 static void idt77252_rx(struct idt77252_dev *); 109 110 /* 111 * TSQ handling. 112 */ 113 static int init_tsq(struct idt77252_dev *); 114 static void deinit_tsq(struct idt77252_dev *); 115 static void idt77252_tx(struct idt77252_dev *); 116 117 118 /* 119 * ATM Interface. 120 */ 121 static void idt77252_dev_close(struct atm_dev *dev); 122 static int idt77252_open(struct atm_vcc *vcc); 123 static void idt77252_close(struct atm_vcc *vcc); 124 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb); 125 static int idt77252_send_oam(struct atm_vcc *vcc, void *cell, 126 int flags); 127 static void idt77252_phy_put(struct atm_dev *dev, unsigned char value, 128 unsigned long addr); 129 static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr); 130 static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, 131 int flags); 132 static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos, 133 char *page); 134 static void idt77252_softint(struct work_struct *work); 135 136 137 static const struct atmdev_ops idt77252_ops = 138 { 139 .dev_close = idt77252_dev_close, 140 .open = idt77252_open, 141 .close = idt77252_close, 142 .send = idt77252_send, 143 .send_oam = idt77252_send_oam, 144 .phy_put = idt77252_phy_put, 145 .phy_get = idt77252_phy_get, 146 .change_qos = idt77252_change_qos, 147 .proc_read = idt77252_proc_read, 148 .owner = THIS_MODULE 149 }; 150 151 static struct idt77252_dev *idt77252_chain = NULL; 152 static unsigned int idt77252_sram_write_errors = 0; 153 154 /*****************************************************************************/ 155 /* */ 156 /* I/O and Utility Bus */ 157 /* */ 158 /*****************************************************************************/ 159 160 static void 161 waitfor_idle(struct idt77252_dev *card) 162 { 163 u32 stat; 164 165 stat = readl(SAR_REG_STAT); 166 while (stat & SAR_STAT_CMDBZ) 167 stat = readl(SAR_REG_STAT); 168 } 169 170 static u32 171 read_sram(struct idt77252_dev *card, unsigned long addr) 172 { 173 unsigned long flags; 174 u32 value; 175 176 spin_lock_irqsave(&card->cmd_lock, flags); 177 writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD); 178 waitfor_idle(card); 179 value = readl(SAR_REG_DR0); 180 spin_unlock_irqrestore(&card->cmd_lock, flags); 181 return value; 182 } 183 184 static void 185 write_sram(struct idt77252_dev *card, unsigned long addr, u32 value) 186 { 187 unsigned long flags; 188 189 if ((idt77252_sram_write_errors == 0) && 190 (((addr > card->tst[0] + card->tst_size - 2) && 191 (addr < card->tst[0] + card->tst_size)) || 192 ((addr > card->tst[1] + card->tst_size - 2) && 193 (addr < card->tst[1] + card->tst_size)))) { 194 printk("%s: ERROR: TST JMP section at %08lx written: %08x\n", 195 card->name, addr, value); 196 } 197 198 spin_lock_irqsave(&card->cmd_lock, flags); 199 writel(value, SAR_REG_DR0); 200 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD); 201 waitfor_idle(card); 202 spin_unlock_irqrestore(&card->cmd_lock, flags); 203 } 204 205 static u8 206 read_utility(void *dev, unsigned long ubus_addr) 207 { 208 struct idt77252_dev *card = dev; 209 unsigned long flags; 210 u8 value; 211 212 if (!card) { 213 printk("Error: No such device.\n"); 214 return -1; 215 } 216 217 spin_lock_irqsave(&card->cmd_lock, flags); 218 writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD); 219 waitfor_idle(card); 220 value = readl(SAR_REG_DR0); 221 spin_unlock_irqrestore(&card->cmd_lock, flags); 222 return value; 223 } 224 225 static void 226 write_utility(void *dev, unsigned long ubus_addr, u8 value) 227 { 228 struct idt77252_dev *card = dev; 229 unsigned long flags; 230 231 if (!card) { 232 printk("Error: No such device.\n"); 233 return; 234 } 235 236 spin_lock_irqsave(&card->cmd_lock, flags); 237 writel((u32) value, SAR_REG_DR0); 238 writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD); 239 waitfor_idle(card); 240 spin_unlock_irqrestore(&card->cmd_lock, flags); 241 } 242 243 #ifdef HAVE_EEPROM 244 static u32 rdsrtab[] = 245 { 246 SAR_GP_EECS | SAR_GP_EESCLK, 247 0, 248 SAR_GP_EESCLK, /* 0 */ 249 0, 250 SAR_GP_EESCLK, /* 0 */ 251 0, 252 SAR_GP_EESCLK, /* 0 */ 253 0, 254 SAR_GP_EESCLK, /* 0 */ 255 0, 256 SAR_GP_EESCLK, /* 0 */ 257 SAR_GP_EEDO, 258 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 259 0, 260 SAR_GP_EESCLK, /* 0 */ 261 SAR_GP_EEDO, 262 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */ 263 }; 264 265 static u32 wrentab[] = 266 { 267 SAR_GP_EECS | SAR_GP_EESCLK, 268 0, 269 SAR_GP_EESCLK, /* 0 */ 270 0, 271 SAR_GP_EESCLK, /* 0 */ 272 0, 273 SAR_GP_EESCLK, /* 0 */ 274 0, 275 SAR_GP_EESCLK, /* 0 */ 276 SAR_GP_EEDO, 277 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 278 SAR_GP_EEDO, 279 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 280 0, 281 SAR_GP_EESCLK, /* 0 */ 282 0, 283 SAR_GP_EESCLK /* 0 */ 284 }; 285 286 static u32 rdtab[] = 287 { 288 SAR_GP_EECS | SAR_GP_EESCLK, 289 0, 290 SAR_GP_EESCLK, /* 0 */ 291 0, 292 SAR_GP_EESCLK, /* 0 */ 293 0, 294 SAR_GP_EESCLK, /* 0 */ 295 0, 296 SAR_GP_EESCLK, /* 0 */ 297 0, 298 SAR_GP_EESCLK, /* 0 */ 299 0, 300 SAR_GP_EESCLK, /* 0 */ 301 SAR_GP_EEDO, 302 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 303 SAR_GP_EEDO, 304 SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */ 305 }; 306 307 static u32 wrtab[] = 308 { 309 SAR_GP_EECS | SAR_GP_EESCLK, 310 0, 311 SAR_GP_EESCLK, /* 0 */ 312 0, 313 SAR_GP_EESCLK, /* 0 */ 314 0, 315 SAR_GP_EESCLK, /* 0 */ 316 0, 317 SAR_GP_EESCLK, /* 0 */ 318 0, 319 SAR_GP_EESCLK, /* 0 */ 320 0, 321 SAR_GP_EESCLK, /* 0 */ 322 SAR_GP_EEDO, 323 SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */ 324 0, 325 SAR_GP_EESCLK /* 0 */ 326 }; 327 328 static u32 clktab[] = 329 { 330 0, 331 SAR_GP_EESCLK, 332 0, 333 SAR_GP_EESCLK, 334 0, 335 SAR_GP_EESCLK, 336 0, 337 SAR_GP_EESCLK, 338 0, 339 SAR_GP_EESCLK, 340 0, 341 SAR_GP_EESCLK, 342 0, 343 SAR_GP_EESCLK, 344 0, 345 SAR_GP_EESCLK, 346 0 347 }; 348 349 static u32 350 idt77252_read_gp(struct idt77252_dev *card) 351 { 352 u32 gp; 353 354 gp = readl(SAR_REG_GP); 355 #if 0 356 printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0"); 357 #endif 358 return gp; 359 } 360 361 static void 362 idt77252_write_gp(struct idt77252_dev *card, u32 value) 363 { 364 unsigned long flags; 365 366 #if 0 367 printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS", 368 value & SAR_GP_EESCLK ? "HIGH" : "LOW ", 369 value & SAR_GP_EEDO ? "1" : "0"); 370 #endif 371 372 spin_lock_irqsave(&card->cmd_lock, flags); 373 waitfor_idle(card); 374 writel(value, SAR_REG_GP); 375 spin_unlock_irqrestore(&card->cmd_lock, flags); 376 } 377 378 static u8 379 idt77252_eeprom_read_status(struct idt77252_dev *card) 380 { 381 u8 byte; 382 u32 gp; 383 int i, j; 384 385 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO); 386 387 for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) { 388 idt77252_write_gp(card, gp | rdsrtab[i]); 389 udelay(5); 390 } 391 idt77252_write_gp(card, gp | SAR_GP_EECS); 392 udelay(5); 393 394 byte = 0; 395 for (i = 0, j = 0; i < 8; i++) { 396 byte <<= 1; 397 398 idt77252_write_gp(card, gp | clktab[j++]); 399 udelay(5); 400 401 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0; 402 403 idt77252_write_gp(card, gp | clktab[j++]); 404 udelay(5); 405 } 406 idt77252_write_gp(card, gp | SAR_GP_EECS); 407 udelay(5); 408 409 return byte; 410 } 411 412 static u8 413 idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset) 414 { 415 u8 byte; 416 u32 gp; 417 int i, j; 418 419 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO); 420 421 for (i = 0; i < ARRAY_SIZE(rdtab); i++) { 422 idt77252_write_gp(card, gp | rdtab[i]); 423 udelay(5); 424 } 425 idt77252_write_gp(card, gp | SAR_GP_EECS); 426 udelay(5); 427 428 for (i = 0, j = 0; i < 8; i++) { 429 idt77252_write_gp(card, gp | clktab[j++] | 430 (offset & 1 ? SAR_GP_EEDO : 0)); 431 udelay(5); 432 433 idt77252_write_gp(card, gp | clktab[j++] | 434 (offset & 1 ? SAR_GP_EEDO : 0)); 435 udelay(5); 436 437 offset >>= 1; 438 } 439 idt77252_write_gp(card, gp | SAR_GP_EECS); 440 udelay(5); 441 442 byte = 0; 443 for (i = 0, j = 0; i < 8; i++) { 444 byte <<= 1; 445 446 idt77252_write_gp(card, gp | clktab[j++]); 447 udelay(5); 448 449 byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0; 450 451 idt77252_write_gp(card, gp | clktab[j++]); 452 udelay(5); 453 } 454 idt77252_write_gp(card, gp | SAR_GP_EECS); 455 udelay(5); 456 457 return byte; 458 } 459 460 static void 461 idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data) 462 { 463 u32 gp; 464 int i, j; 465 466 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO); 467 468 for (i = 0; i < ARRAY_SIZE(wrentab); i++) { 469 idt77252_write_gp(card, gp | wrentab[i]); 470 udelay(5); 471 } 472 idt77252_write_gp(card, gp | SAR_GP_EECS); 473 udelay(5); 474 475 for (i = 0; i < ARRAY_SIZE(wrtab); i++) { 476 idt77252_write_gp(card, gp | wrtab[i]); 477 udelay(5); 478 } 479 idt77252_write_gp(card, gp | SAR_GP_EECS); 480 udelay(5); 481 482 for (i = 0, j = 0; i < 8; i++) { 483 idt77252_write_gp(card, gp | clktab[j++] | 484 (offset & 1 ? SAR_GP_EEDO : 0)); 485 udelay(5); 486 487 idt77252_write_gp(card, gp | clktab[j++] | 488 (offset & 1 ? SAR_GP_EEDO : 0)); 489 udelay(5); 490 491 offset >>= 1; 492 } 493 idt77252_write_gp(card, gp | SAR_GP_EECS); 494 udelay(5); 495 496 for (i = 0, j = 0; i < 8; i++) { 497 idt77252_write_gp(card, gp | clktab[j++] | 498 (data & 1 ? SAR_GP_EEDO : 0)); 499 udelay(5); 500 501 idt77252_write_gp(card, gp | clktab[j++] | 502 (data & 1 ? SAR_GP_EEDO : 0)); 503 udelay(5); 504 505 data >>= 1; 506 } 507 idt77252_write_gp(card, gp | SAR_GP_EECS); 508 udelay(5); 509 } 510 511 static void 512 idt77252_eeprom_init(struct idt77252_dev *card) 513 { 514 u32 gp; 515 516 gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO); 517 518 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK); 519 udelay(5); 520 idt77252_write_gp(card, gp | SAR_GP_EECS); 521 udelay(5); 522 idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK); 523 udelay(5); 524 idt77252_write_gp(card, gp | SAR_GP_EECS); 525 udelay(5); 526 } 527 #endif /* HAVE_EEPROM */ 528 529 530 #ifdef CONFIG_ATM_IDT77252_DEBUG 531 static void 532 dump_tct(struct idt77252_dev *card, int index) 533 { 534 unsigned long tct; 535 int i; 536 537 tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE); 538 539 printk("%s: TCT %x:", card->name, index); 540 for (i = 0; i < 8; i++) { 541 printk(" %08x", read_sram(card, tct + i)); 542 } 543 printk("\n"); 544 } 545 546 static void 547 idt77252_tx_dump(struct idt77252_dev *card) 548 { 549 struct atm_vcc *vcc; 550 struct vc_map *vc; 551 int i; 552 553 printk("%s\n", __func__); 554 for (i = 0; i < card->tct_size; i++) { 555 vc = card->vcs[i]; 556 if (!vc) 557 continue; 558 559 vcc = NULL; 560 if (vc->rx_vcc) 561 vcc = vc->rx_vcc; 562 else if (vc->tx_vcc) 563 vcc = vc->tx_vcc; 564 565 if (!vcc) 566 continue; 567 568 printk("%s: Connection %d:\n", card->name, vc->index); 569 dump_tct(card, vc->index); 570 } 571 } 572 #endif 573 574 575 /*****************************************************************************/ 576 /* */ 577 /* SCQ Handling */ 578 /* */ 579 /*****************************************************************************/ 580 581 static int 582 sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue) 583 { 584 struct sb_pool *pool = &card->sbpool[queue]; 585 int index; 586 587 index = pool->index; 588 while (pool->skb[index]) { 589 index = (index + 1) & FBQ_MASK; 590 if (index == pool->index) 591 return -ENOBUFS; 592 } 593 594 pool->skb[index] = skb; 595 IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index); 596 597 pool->index = (index + 1) & FBQ_MASK; 598 return 0; 599 } 600 601 static void 602 sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb) 603 { 604 unsigned int queue, index; 605 u32 handle; 606 607 handle = IDT77252_PRV_POOL(skb); 608 609 queue = POOL_QUEUE(handle); 610 if (queue > 3) 611 return; 612 613 index = POOL_INDEX(handle); 614 if (index > FBQ_SIZE - 1) 615 return; 616 617 card->sbpool[queue].skb[index] = NULL; 618 } 619 620 static struct sk_buff * 621 sb_pool_skb(struct idt77252_dev *card, u32 handle) 622 { 623 unsigned int queue, index; 624 625 queue = POOL_QUEUE(handle); 626 if (queue > 3) 627 return NULL; 628 629 index = POOL_INDEX(handle); 630 if (index > FBQ_SIZE - 1) 631 return NULL; 632 633 return card->sbpool[queue].skb[index]; 634 } 635 636 static struct scq_info * 637 alloc_scq(struct idt77252_dev *card, int class) 638 { 639 struct scq_info *scq; 640 641 scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL); 642 if (!scq) 643 return NULL; 644 scq->base = dma_alloc_coherent(&card->pcidev->dev, SCQ_SIZE, 645 &scq->paddr, GFP_KERNEL); 646 if (scq->base == NULL) { 647 kfree(scq); 648 return NULL; 649 } 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 dma_free_coherent(&card->pcidev->dev, SCQ_SIZE, 674 scq->base, scq->paddr); 675 676 while ((skb = skb_dequeue(&scq->transmit))) { 677 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 678 skb->len, DMA_TO_DEVICE); 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 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 689 skb->len, DMA_TO_DEVICE); 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 (refcount_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 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 805 skb->len, DMA_TO_DEVICE); 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 u32 word4; 839 840 if (skb->len == 0) { 841 printk("%s: invalid skb->len (%d)\n", card->name, skb->len); 842 return -EINVAL; 843 } 844 845 TXPRINTK("%s: Sending %d bytes of data.\n", 846 card->name, skb->len); 847 848 tbd = &IDT77252_PRV_TBD(skb); 849 vcc = ATM_SKB(skb)->vcc; 850 word4 = (skb->data[0] << 24) | (skb->data[1] << 16) | 851 (skb->data[2] << 8) | (skb->data[3] << 0); 852 853 IDT77252_PRV_PADDR(skb) = dma_map_single(&card->pcidev->dev, skb->data, 854 skb->len, DMA_TO_DEVICE); 855 856 error = -EINVAL; 857 858 if (oam) { 859 if (skb->len != 52) 860 goto errout; 861 862 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU; 863 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4; 864 tbd->word_3 = 0x00000000; 865 tbd->word_4 = word4; 866 867 if (test_bit(VCF_RSV, &vc->flags)) 868 vc = card->vcs[0]; 869 870 goto done; 871 } 872 873 if (test_bit(VCF_RSV, &vc->flags)) { 874 printk("%s: Trying to transmit on reserved VC\n", card->name); 875 goto errout; 876 } 877 878 aal = vcc->qos.aal; 879 880 switch (aal) { 881 case ATM_AAL0: 882 case ATM_AAL34: 883 if (skb->len > 52) 884 goto errout; 885 886 if (aal == ATM_AAL0) 887 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 | 888 ATM_CELL_PAYLOAD; 889 else 890 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 | 891 ATM_CELL_PAYLOAD; 892 893 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4; 894 tbd->word_3 = 0x00000000; 895 tbd->word_4 = word4; 896 break; 897 898 case ATM_AAL5: 899 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len; 900 tbd->word_2 = IDT77252_PRV_PADDR(skb); 901 tbd->word_3 = skb->len; 902 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) | 903 (vcc->vci << SAR_TBD_VCI_SHIFT); 904 break; 905 906 case ATM_AAL1: 907 case ATM_AAL2: 908 default: 909 printk("%s: Traffic type not supported.\n", card->name); 910 error = -EPROTONOSUPPORT; 911 goto errout; 912 } 913 914 done: 915 spin_lock_irqsave(&vc->scq->skblock, flags); 916 skb_queue_tail(&vc->scq->pending, skb); 917 918 while ((skb = skb_dequeue(&vc->scq->pending))) { 919 if (push_on_scq(card, vc, skb)) { 920 skb_queue_head(&vc->scq->pending, skb); 921 break; 922 } 923 } 924 spin_unlock_irqrestore(&vc->scq->skblock, flags); 925 926 return 0; 927 928 errout: 929 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 930 skb->len, DMA_TO_DEVICE); 931 return error; 932 } 933 934 static unsigned long 935 get_free_scd(struct idt77252_dev *card, struct vc_map *vc) 936 { 937 int i; 938 939 for (i = 0; i < card->scd_size; i++) { 940 if (!card->scd2vc[i]) { 941 card->scd2vc[i] = vc; 942 vc->scd_index = i; 943 return card->scd_base + i * SAR_SRAM_SCD_SIZE; 944 } 945 } 946 return 0; 947 } 948 949 static void 950 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class) 951 { 952 write_sram(card, scq->scd, scq->paddr); 953 write_sram(card, scq->scd + 1, 0x00000000); 954 write_sram(card, scq->scd + 2, 0xffffffff); 955 write_sram(card, scq->scd + 3, 0x00000000); 956 } 957 958 static void 959 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class) 960 { 961 return; 962 } 963 964 /*****************************************************************************/ 965 /* */ 966 /* RSQ Handling */ 967 /* */ 968 /*****************************************************************************/ 969 970 static int 971 init_rsq(struct idt77252_dev *card) 972 { 973 struct rsq_entry *rsqe; 974 975 card->rsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE, 976 &card->rsq.paddr, GFP_KERNEL); 977 if (card->rsq.base == NULL) { 978 printk("%s: can't allocate RSQ.\n", card->name); 979 return -1; 980 } 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 dma_free_coherent(&card->pcidev->dev, 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 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1063 skb_end_pointer(skb) - skb->data, 1064 DMA_FROM_DEVICE); 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 skb_put_data(sb, cell, ATM_CELL_PAYLOAD); 1095 1096 ATM_SKB(sb)->vcc = vcc; 1097 __net_timestamp(sb); 1098 vcc->push(vcc, sb); 1099 atomic_inc(&vcc->stats->rx); 1100 1101 cell += ATM_CELL_PAYLOAD; 1102 } 1103 1104 recycle_rx_skb(card, skb); 1105 return; 1106 } 1107 if (vcc->qos.aal != ATM_AAL5) { 1108 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n", 1109 card->name, vcc->qos.aal); 1110 recycle_rx_skb(card, skb); 1111 return; 1112 } 1113 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD; 1114 1115 rpp = &vc->rcv.rx_pool; 1116 1117 __skb_queue_tail(&rpp->queue, skb); 1118 rpp->len += skb->len; 1119 1120 if (stat & SAR_RSQE_EPDU) { 1121 unsigned char *l1l2; 1122 unsigned int len; 1123 1124 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6); 1125 1126 len = (l1l2[0] << 8) | l1l2[1]; 1127 len = len ? len : 0x10000; 1128 1129 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len); 1130 1131 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) { 1132 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. " 1133 "(CDC: %08x)\n", 1134 card->name, len, rpp->len, readl(SAR_REG_CDC)); 1135 recycle_rx_pool_skb(card, rpp); 1136 atomic_inc(&vcc->stats->rx_err); 1137 return; 1138 } 1139 if (stat & SAR_RSQE_CRC) { 1140 RXPRINTK("%s: AAL5 CRC error.\n", card->name); 1141 recycle_rx_pool_skb(card, rpp); 1142 atomic_inc(&vcc->stats->rx_err); 1143 return; 1144 } 1145 if (skb_queue_len(&rpp->queue) > 1) { 1146 struct sk_buff *sb; 1147 1148 skb = dev_alloc_skb(rpp->len); 1149 if (!skb) { 1150 RXPRINTK("%s: Can't alloc RX skb.\n", 1151 card->name); 1152 recycle_rx_pool_skb(card, rpp); 1153 atomic_inc(&vcc->stats->rx_err); 1154 return; 1155 } 1156 if (!atm_charge(vcc, skb->truesize)) { 1157 recycle_rx_pool_skb(card, rpp); 1158 dev_kfree_skb(skb); 1159 return; 1160 } 1161 skb_queue_walk(&rpp->queue, sb) 1162 skb_put_data(skb, sb->data, sb->len); 1163 1164 recycle_rx_pool_skb(card, rpp); 1165 1166 skb_trim(skb, len); 1167 ATM_SKB(skb)->vcc = vcc; 1168 __net_timestamp(skb); 1169 1170 vcc->push(vcc, skb); 1171 atomic_inc(&vcc->stats->rx); 1172 1173 return; 1174 } 1175 1176 flush_rx_pool(card, rpp); 1177 1178 if (!atm_charge(vcc, skb->truesize)) { 1179 recycle_rx_skb(card, skb); 1180 return; 1181 } 1182 1183 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1184 skb_end_pointer(skb) - skb->data, 1185 DMA_FROM_DEVICE); 1186 sb_pool_remove(card, skb); 1187 1188 skb_trim(skb, len); 1189 ATM_SKB(skb)->vcc = vcc; 1190 __net_timestamp(skb); 1191 1192 vcc->push(vcc, skb); 1193 atomic_inc(&vcc->stats->rx); 1194 1195 if (skb->truesize > SAR_FB_SIZE_3) 1196 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1); 1197 else if (skb->truesize > SAR_FB_SIZE_2) 1198 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1); 1199 else if (skb->truesize > SAR_FB_SIZE_1) 1200 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1); 1201 else 1202 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1); 1203 return; 1204 } 1205 } 1206 1207 static void 1208 idt77252_rx(struct idt77252_dev *card) 1209 { 1210 struct rsq_entry *rsqe; 1211 1212 if (card->rsq.next == card->rsq.last) 1213 rsqe = card->rsq.base; 1214 else 1215 rsqe = card->rsq.next + 1; 1216 1217 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) { 1218 RXPRINTK("%s: no entry in RSQ.\n", card->name); 1219 return; 1220 } 1221 1222 do { 1223 dequeue_rx(card, rsqe); 1224 rsqe->word_4 = 0; 1225 card->rsq.next = rsqe; 1226 if (card->rsq.next == card->rsq.last) 1227 rsqe = card->rsq.base; 1228 else 1229 rsqe = card->rsq.next + 1; 1230 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID); 1231 1232 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base, 1233 SAR_REG_RSQH); 1234 } 1235 1236 static void 1237 idt77252_rx_raw(struct idt77252_dev *card) 1238 { 1239 struct sk_buff *queue; 1240 u32 head, tail; 1241 struct atm_vcc *vcc; 1242 struct vc_map *vc; 1243 struct sk_buff *sb; 1244 1245 if (card->raw_cell_head == NULL) { 1246 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1)); 1247 card->raw_cell_head = sb_pool_skb(card, handle); 1248 } 1249 1250 queue = card->raw_cell_head; 1251 if (!queue) 1252 return; 1253 1254 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16); 1255 tail = readl(SAR_REG_RAWCT); 1256 1257 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(queue), 1258 skb_end_offset(queue) - 16, 1259 DMA_FROM_DEVICE); 1260 1261 while (head != tail) { 1262 unsigned int vpi, vci; 1263 u32 header; 1264 1265 header = le32_to_cpu(*(u32 *) &queue->data[0]); 1266 1267 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT; 1268 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT; 1269 1270 #ifdef CONFIG_ATM_IDT77252_DEBUG 1271 if (debug & DBG_RAW_CELL) { 1272 int i; 1273 1274 printk("%s: raw cell %x.%02x.%04x.%x.%x\n", 1275 card->name, (header >> 28) & 0x000f, 1276 (header >> 20) & 0x00ff, 1277 (header >> 4) & 0xffff, 1278 (header >> 1) & 0x0007, 1279 (header >> 0) & 0x0001); 1280 for (i = 16; i < 64; i++) 1281 printk(" %02x", queue->data[i]); 1282 printk("\n"); 1283 } 1284 #endif 1285 1286 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) { 1287 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n", 1288 card->name, vpi, vci); 1289 goto drop; 1290 } 1291 1292 vc = card->vcs[VPCI2VC(card, vpi, vci)]; 1293 if (!vc || !test_bit(VCF_RX, &vc->flags)) { 1294 RPRINTK("%s: SDU received on non RX vc %u.%u\n", 1295 card->name, vpi, vci); 1296 goto drop; 1297 } 1298 1299 vcc = vc->rx_vcc; 1300 1301 if (vcc->qos.aal != ATM_AAL0) { 1302 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n", 1303 card->name, vpi, vci); 1304 atomic_inc(&vcc->stats->rx_drop); 1305 goto drop; 1306 } 1307 1308 if ((sb = dev_alloc_skb(64)) == NULL) { 1309 printk("%s: Can't allocate buffers for AAL0.\n", 1310 card->name); 1311 atomic_inc(&vcc->stats->rx_err); 1312 goto drop; 1313 } 1314 1315 if (!atm_charge(vcc, sb->truesize)) { 1316 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n", 1317 card->name); 1318 dev_kfree_skb(sb); 1319 goto drop; 1320 } 1321 1322 *((u32 *) sb->data) = header; 1323 skb_put(sb, sizeof(u32)); 1324 skb_put_data(sb, &(queue->data[16]), ATM_CELL_PAYLOAD); 1325 1326 ATM_SKB(sb)->vcc = vcc; 1327 __net_timestamp(sb); 1328 vcc->push(vcc, sb); 1329 atomic_inc(&vcc->stats->rx); 1330 1331 drop: 1332 skb_pull(queue, 64); 1333 1334 head = IDT77252_PRV_PADDR(queue) 1335 + (queue->data - queue->head - 16); 1336 1337 if (queue->len < 128) { 1338 struct sk_buff *next; 1339 u32 handle; 1340 1341 head = le32_to_cpu(*(u32 *) &queue->data[0]); 1342 handle = le32_to_cpu(*(u32 *) &queue->data[4]); 1343 1344 next = sb_pool_skb(card, handle); 1345 recycle_rx_skb(card, queue); 1346 1347 if (next) { 1348 card->raw_cell_head = next; 1349 queue = card->raw_cell_head; 1350 dma_sync_single_for_cpu(&card->pcidev->dev, 1351 IDT77252_PRV_PADDR(queue), 1352 (skb_end_pointer(queue) - 1353 queue->data), 1354 DMA_FROM_DEVICE); 1355 } else { 1356 card->raw_cell_head = NULL; 1357 printk("%s: raw cell queue overrun\n", 1358 card->name); 1359 break; 1360 } 1361 } 1362 } 1363 } 1364 1365 1366 /*****************************************************************************/ 1367 /* */ 1368 /* TSQ Handling */ 1369 /* */ 1370 /*****************************************************************************/ 1371 1372 static int 1373 init_tsq(struct idt77252_dev *card) 1374 { 1375 struct tsq_entry *tsqe; 1376 1377 card->tsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE, 1378 &card->tsq.paddr, GFP_KERNEL); 1379 if (card->tsq.base == NULL) { 1380 printk("%s: can't allocate TSQ.\n", card->name); 1381 return -1; 1382 } 1383 1384 card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1; 1385 card->tsq.next = card->tsq.last; 1386 for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++) 1387 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID); 1388 1389 writel(card->tsq.paddr, SAR_REG_TSQB); 1390 writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base, 1391 SAR_REG_TSQH); 1392 1393 return 0; 1394 } 1395 1396 static void 1397 deinit_tsq(struct idt77252_dev *card) 1398 { 1399 dma_free_coherent(&card->pcidev->dev, TSQSIZE, 1400 card->tsq.base, card->tsq.paddr); 1401 } 1402 1403 static void 1404 idt77252_tx(struct idt77252_dev *card) 1405 { 1406 struct tsq_entry *tsqe; 1407 unsigned int vpi, vci; 1408 struct vc_map *vc; 1409 u32 conn, stat; 1410 1411 if (card->tsq.next == card->tsq.last) 1412 tsqe = card->tsq.base; 1413 else 1414 tsqe = card->tsq.next + 1; 1415 1416 TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe, 1417 card->tsq.base, card->tsq.next, card->tsq.last); 1418 TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n", 1419 readl(SAR_REG_TSQB), 1420 readl(SAR_REG_TSQT), 1421 readl(SAR_REG_TSQH)); 1422 1423 stat = le32_to_cpu(tsqe->word_2); 1424 1425 if (stat & SAR_TSQE_INVALID) 1426 return; 1427 1428 do { 1429 TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe, 1430 le32_to_cpu(tsqe->word_1), 1431 le32_to_cpu(tsqe->word_2)); 1432 1433 switch (stat & SAR_TSQE_TYPE) { 1434 case SAR_TSQE_TYPE_TIMER: 1435 TXPRINTK("%s: Timer RollOver detected.\n", card->name); 1436 break; 1437 1438 case SAR_TSQE_TYPE_IDLE: 1439 1440 conn = le32_to_cpu(tsqe->word_1); 1441 1442 if (SAR_TSQE_TAG(stat) == 0x10) { 1443 #ifdef NOTDEF 1444 printk("%s: Connection %d halted.\n", 1445 card->name, 1446 le32_to_cpu(tsqe->word_1) & 0x1fff); 1447 #endif 1448 break; 1449 } 1450 1451 vc = card->vcs[conn & 0x1fff]; 1452 if (!vc) { 1453 printk("%s: could not find VC from conn %d\n", 1454 card->name, conn & 0x1fff); 1455 break; 1456 } 1457 1458 printk("%s: Connection %d IDLE.\n", 1459 card->name, vc->index); 1460 1461 set_bit(VCF_IDLE, &vc->flags); 1462 break; 1463 1464 case SAR_TSQE_TYPE_TSR: 1465 1466 conn = le32_to_cpu(tsqe->word_1); 1467 1468 vc = card->vcs[conn & 0x1fff]; 1469 if (!vc) { 1470 printk("%s: no VC at index %d\n", 1471 card->name, 1472 le32_to_cpu(tsqe->word_1) & 0x1fff); 1473 break; 1474 } 1475 1476 drain_scq(card, vc); 1477 break; 1478 1479 case SAR_TSQE_TYPE_TBD_COMP: 1480 1481 conn = le32_to_cpu(tsqe->word_1); 1482 1483 vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff; 1484 vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff; 1485 1486 if (vpi >= (1 << card->vpibits) || 1487 vci >= (1 << card->vcibits)) { 1488 printk("%s: TBD complete: " 1489 "out of range VPI.VCI %u.%u\n", 1490 card->name, vpi, vci); 1491 break; 1492 } 1493 1494 vc = card->vcs[VPCI2VC(card, vpi, vci)]; 1495 if (!vc) { 1496 printk("%s: TBD complete: " 1497 "no VC at VPI.VCI %u.%u\n", 1498 card->name, vpi, vci); 1499 break; 1500 } 1501 1502 drain_scq(card, vc); 1503 break; 1504 } 1505 1506 tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID); 1507 1508 card->tsq.next = tsqe; 1509 if (card->tsq.next == card->tsq.last) 1510 tsqe = card->tsq.base; 1511 else 1512 tsqe = card->tsq.next + 1; 1513 1514 TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe, 1515 card->tsq.base, card->tsq.next, card->tsq.last); 1516 1517 stat = le32_to_cpu(tsqe->word_2); 1518 1519 } while (!(stat & SAR_TSQE_INVALID)); 1520 1521 writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base, 1522 SAR_REG_TSQH); 1523 1524 XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n", 1525 card->index, readl(SAR_REG_TSQH), 1526 readl(SAR_REG_TSQT), card->tsq.next); 1527 } 1528 1529 1530 static void 1531 tst_timer(struct timer_list *t) 1532 { 1533 struct idt77252_dev *card = from_timer(card, t, tst_timer); 1534 unsigned long base, idle, jump; 1535 unsigned long flags; 1536 u32 pc; 1537 int e; 1538 1539 spin_lock_irqsave(&card->tst_lock, flags); 1540 1541 base = card->tst[card->tst_index]; 1542 idle = card->tst[card->tst_index ^ 1]; 1543 1544 if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) { 1545 jump = base + card->tst_size - 2; 1546 1547 pc = readl(SAR_REG_NOW) >> 2; 1548 if ((pc ^ idle) & ~(card->tst_size - 1)) { 1549 mod_timer(&card->tst_timer, jiffies + 1); 1550 goto out; 1551 } 1552 1553 clear_bit(TST_SWITCH_WAIT, &card->tst_state); 1554 1555 card->tst_index ^= 1; 1556 write_sram(card, jump, TSTE_OPC_JMP | (base << 2)); 1557 1558 base = card->tst[card->tst_index]; 1559 idle = card->tst[card->tst_index ^ 1]; 1560 1561 for (e = 0; e < card->tst_size - 2; e++) { 1562 if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) { 1563 write_sram(card, idle + e, 1564 card->soft_tst[e].tste & TSTE_MASK); 1565 card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE); 1566 } 1567 } 1568 } 1569 1570 if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) { 1571 1572 for (e = 0; e < card->tst_size - 2; e++) { 1573 if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) { 1574 write_sram(card, idle + e, 1575 card->soft_tst[e].tste & TSTE_MASK); 1576 card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE); 1577 card->soft_tst[e].tste |= TSTE_PUSH_IDLE; 1578 } 1579 } 1580 1581 jump = base + card->tst_size - 2; 1582 1583 write_sram(card, jump, TSTE_OPC_NULL); 1584 set_bit(TST_SWITCH_WAIT, &card->tst_state); 1585 1586 mod_timer(&card->tst_timer, jiffies + 1); 1587 } 1588 1589 out: 1590 spin_unlock_irqrestore(&card->tst_lock, flags); 1591 } 1592 1593 static int 1594 __fill_tst(struct idt77252_dev *card, struct vc_map *vc, 1595 int n, unsigned int opc) 1596 { 1597 unsigned long cl, avail; 1598 unsigned long idle; 1599 int e, r; 1600 u32 data; 1601 1602 avail = card->tst_size - 2; 1603 for (e = 0; e < avail; e++) { 1604 if (card->soft_tst[e].vc == NULL) 1605 break; 1606 } 1607 if (e >= avail) { 1608 printk("%s: No free TST entries found\n", card->name); 1609 return -1; 1610 } 1611 1612 NPRINTK("%s: conn %d: first TST entry at %d.\n", 1613 card->name, vc ? vc->index : -1, e); 1614 1615 r = n; 1616 cl = avail; 1617 data = opc & TSTE_OPC_MASK; 1618 if (vc && (opc != TSTE_OPC_NULL)) 1619 data = opc | vc->index; 1620 1621 idle = card->tst[card->tst_index ^ 1]; 1622 1623 /* 1624 * Fill Soft TST. 1625 */ 1626 while (r > 0) { 1627 if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) { 1628 if (vc) 1629 card->soft_tst[e].vc = vc; 1630 else 1631 card->soft_tst[e].vc = (void *)-1; 1632 1633 card->soft_tst[e].tste = data; 1634 if (timer_pending(&card->tst_timer)) 1635 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE; 1636 else { 1637 write_sram(card, idle + e, data); 1638 card->soft_tst[e].tste |= TSTE_PUSH_IDLE; 1639 } 1640 1641 cl -= card->tst_size; 1642 r--; 1643 } 1644 1645 if (++e == avail) 1646 e = 0; 1647 cl += n; 1648 } 1649 1650 return 0; 1651 } 1652 1653 static int 1654 fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc) 1655 { 1656 unsigned long flags; 1657 int res; 1658 1659 spin_lock_irqsave(&card->tst_lock, flags); 1660 1661 res = __fill_tst(card, vc, n, opc); 1662 1663 set_bit(TST_SWITCH_PENDING, &card->tst_state); 1664 if (!timer_pending(&card->tst_timer)) 1665 mod_timer(&card->tst_timer, jiffies + 1); 1666 1667 spin_unlock_irqrestore(&card->tst_lock, flags); 1668 return res; 1669 } 1670 1671 static int 1672 __clear_tst(struct idt77252_dev *card, struct vc_map *vc) 1673 { 1674 unsigned long idle; 1675 int e; 1676 1677 idle = card->tst[card->tst_index ^ 1]; 1678 1679 for (e = 0; e < card->tst_size - 2; e++) { 1680 if (card->soft_tst[e].vc == vc) { 1681 card->soft_tst[e].vc = NULL; 1682 1683 card->soft_tst[e].tste = TSTE_OPC_VAR; 1684 if (timer_pending(&card->tst_timer)) 1685 card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE; 1686 else { 1687 write_sram(card, idle + e, TSTE_OPC_VAR); 1688 card->soft_tst[e].tste |= TSTE_PUSH_IDLE; 1689 } 1690 } 1691 } 1692 1693 return 0; 1694 } 1695 1696 static int 1697 clear_tst(struct idt77252_dev *card, struct vc_map *vc) 1698 { 1699 unsigned long flags; 1700 int res; 1701 1702 spin_lock_irqsave(&card->tst_lock, flags); 1703 1704 res = __clear_tst(card, vc); 1705 1706 set_bit(TST_SWITCH_PENDING, &card->tst_state); 1707 if (!timer_pending(&card->tst_timer)) 1708 mod_timer(&card->tst_timer, jiffies + 1); 1709 1710 spin_unlock_irqrestore(&card->tst_lock, flags); 1711 return res; 1712 } 1713 1714 static int 1715 change_tst(struct idt77252_dev *card, struct vc_map *vc, 1716 int n, unsigned int opc) 1717 { 1718 unsigned long flags; 1719 int res; 1720 1721 spin_lock_irqsave(&card->tst_lock, flags); 1722 1723 __clear_tst(card, vc); 1724 res = __fill_tst(card, vc, n, opc); 1725 1726 set_bit(TST_SWITCH_PENDING, &card->tst_state); 1727 if (!timer_pending(&card->tst_timer)) 1728 mod_timer(&card->tst_timer, jiffies + 1); 1729 1730 spin_unlock_irqrestore(&card->tst_lock, flags); 1731 return res; 1732 } 1733 1734 1735 static int 1736 set_tct(struct idt77252_dev *card, struct vc_map *vc) 1737 { 1738 unsigned long tct; 1739 1740 tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE); 1741 1742 switch (vc->class) { 1743 case SCHED_CBR: 1744 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n", 1745 card->name, tct, vc->scq->scd); 1746 1747 write_sram(card, tct + 0, TCT_CBR | vc->scq->scd); 1748 write_sram(card, tct + 1, 0); 1749 write_sram(card, tct + 2, 0); 1750 write_sram(card, tct + 3, 0); 1751 write_sram(card, tct + 4, 0); 1752 write_sram(card, tct + 5, 0); 1753 write_sram(card, tct + 6, 0); 1754 write_sram(card, tct + 7, 0); 1755 break; 1756 1757 case SCHED_UBR: 1758 OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n", 1759 card->name, tct, vc->scq->scd); 1760 1761 write_sram(card, tct + 0, TCT_UBR | vc->scq->scd); 1762 write_sram(card, tct + 1, 0); 1763 write_sram(card, tct + 2, TCT_TSIF); 1764 write_sram(card, tct + 3, TCT_HALT | TCT_IDLE); 1765 write_sram(card, tct + 4, 0); 1766 write_sram(card, tct + 5, vc->init_er); 1767 write_sram(card, tct + 6, 0); 1768 write_sram(card, tct + 7, TCT_FLAG_UBR); 1769 break; 1770 1771 case SCHED_VBR: 1772 case SCHED_ABR: 1773 default: 1774 return -ENOSYS; 1775 } 1776 1777 return 0; 1778 } 1779 1780 /*****************************************************************************/ 1781 /* */ 1782 /* FBQ Handling */ 1783 /* */ 1784 /*****************************************************************************/ 1785 1786 static __inline__ int 1787 idt77252_fbq_full(struct idt77252_dev *card, int queue) 1788 { 1789 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f; 1790 } 1791 1792 static int 1793 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue) 1794 { 1795 unsigned long flags; 1796 u32 handle; 1797 u32 addr; 1798 1799 skb->data = skb->head; 1800 skb_reset_tail_pointer(skb); 1801 skb->len = 0; 1802 1803 skb_reserve(skb, 16); 1804 1805 switch (queue) { 1806 case 0: 1807 skb_put(skb, SAR_FB_SIZE_0); 1808 break; 1809 case 1: 1810 skb_put(skb, SAR_FB_SIZE_1); 1811 break; 1812 case 2: 1813 skb_put(skb, SAR_FB_SIZE_2); 1814 break; 1815 case 3: 1816 skb_put(skb, SAR_FB_SIZE_3); 1817 break; 1818 default: 1819 return -1; 1820 } 1821 1822 if (idt77252_fbq_full(card, queue)) 1823 return -1; 1824 1825 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32)); 1826 1827 handle = IDT77252_PRV_POOL(skb); 1828 addr = IDT77252_PRV_PADDR(skb); 1829 1830 spin_lock_irqsave(&card->cmd_lock, flags); 1831 writel(handle, card->fbq[queue]); 1832 writel(addr, card->fbq[queue]); 1833 spin_unlock_irqrestore(&card->cmd_lock, flags); 1834 1835 return 0; 1836 } 1837 1838 static void 1839 add_rx_skb(struct idt77252_dev *card, int queue, 1840 unsigned int size, unsigned int count) 1841 { 1842 struct sk_buff *skb; 1843 dma_addr_t paddr; 1844 u32 handle; 1845 1846 while (count--) { 1847 skb = dev_alloc_skb(size); 1848 if (!skb) 1849 return; 1850 1851 if (sb_pool_add(card, skb, queue)) { 1852 printk("%s: SB POOL full\n", __func__); 1853 goto outfree; 1854 } 1855 1856 paddr = dma_map_single(&card->pcidev->dev, skb->data, 1857 skb_end_pointer(skb) - skb->data, 1858 DMA_FROM_DEVICE); 1859 IDT77252_PRV_PADDR(skb) = paddr; 1860 1861 if (push_rx_skb(card, skb, queue)) { 1862 printk("%s: FB QUEUE full\n", __func__); 1863 goto outunmap; 1864 } 1865 } 1866 1867 return; 1868 1869 outunmap: 1870 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1871 skb_end_pointer(skb) - skb->data, DMA_FROM_DEVICE); 1872 1873 handle = IDT77252_PRV_POOL(skb); 1874 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL; 1875 1876 outfree: 1877 dev_kfree_skb(skb); 1878 } 1879 1880 1881 static void 1882 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb) 1883 { 1884 u32 handle = IDT77252_PRV_POOL(skb); 1885 int err; 1886 1887 dma_sync_single_for_device(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1888 skb_end_pointer(skb) - skb->data, 1889 DMA_FROM_DEVICE); 1890 1891 err = push_rx_skb(card, skb, POOL_QUEUE(handle)); 1892 if (err) { 1893 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1894 skb_end_pointer(skb) - skb->data, 1895 DMA_FROM_DEVICE); 1896 sb_pool_remove(card, skb); 1897 dev_kfree_skb(skb); 1898 } 1899 } 1900 1901 static void 1902 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp) 1903 { 1904 skb_queue_head_init(&rpp->queue); 1905 rpp->len = 0; 1906 } 1907 1908 static void 1909 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp) 1910 { 1911 struct sk_buff *skb, *tmp; 1912 1913 skb_queue_walk_safe(&rpp->queue, skb, tmp) 1914 recycle_rx_skb(card, skb); 1915 1916 flush_rx_pool(card, rpp); 1917 } 1918 1919 /*****************************************************************************/ 1920 /* */ 1921 /* ATM Interface */ 1922 /* */ 1923 /*****************************************************************************/ 1924 1925 static void 1926 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr) 1927 { 1928 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value); 1929 } 1930 1931 static unsigned char 1932 idt77252_phy_get(struct atm_dev *dev, unsigned long addr) 1933 { 1934 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff)); 1935 } 1936 1937 static inline int 1938 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam) 1939 { 1940 struct atm_dev *dev = vcc->dev; 1941 struct idt77252_dev *card = dev->dev_data; 1942 struct vc_map *vc = vcc->dev_data; 1943 int err; 1944 1945 if (vc == NULL) { 1946 printk("%s: NULL connection in send().\n", card->name); 1947 atomic_inc(&vcc->stats->tx_err); 1948 dev_kfree_skb(skb); 1949 return -EINVAL; 1950 } 1951 if (!test_bit(VCF_TX, &vc->flags)) { 1952 printk("%s: Trying to transmit on a non-tx VC.\n", card->name); 1953 atomic_inc(&vcc->stats->tx_err); 1954 dev_kfree_skb(skb); 1955 return -EINVAL; 1956 } 1957 1958 switch (vcc->qos.aal) { 1959 case ATM_AAL0: 1960 case ATM_AAL1: 1961 case ATM_AAL5: 1962 break; 1963 default: 1964 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal); 1965 atomic_inc(&vcc->stats->tx_err); 1966 dev_kfree_skb(skb); 1967 return -EINVAL; 1968 } 1969 1970 if (skb_shinfo(skb)->nr_frags != 0) { 1971 printk("%s: No scatter-gather yet.\n", card->name); 1972 atomic_inc(&vcc->stats->tx_err); 1973 dev_kfree_skb(skb); 1974 return -EINVAL; 1975 } 1976 ATM_SKB(skb)->vcc = vcc; 1977 1978 err = queue_skb(card, vc, skb, oam); 1979 if (err) { 1980 atomic_inc(&vcc->stats->tx_err); 1981 dev_kfree_skb(skb); 1982 return err; 1983 } 1984 1985 return 0; 1986 } 1987 1988 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb) 1989 { 1990 return idt77252_send_skb(vcc, skb, 0); 1991 } 1992 1993 static int 1994 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags) 1995 { 1996 struct atm_dev *dev = vcc->dev; 1997 struct idt77252_dev *card = dev->dev_data; 1998 struct sk_buff *skb; 1999 2000 skb = dev_alloc_skb(64); 2001 if (!skb) { 2002 printk("%s: Out of memory in send_oam().\n", card->name); 2003 atomic_inc(&vcc->stats->tx_err); 2004 return -ENOMEM; 2005 } 2006 refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 2007 2008 skb_put_data(skb, cell, 52); 2009 2010 return idt77252_send_skb(vcc, skb, 1); 2011 } 2012 2013 static __inline__ unsigned int 2014 idt77252_fls(unsigned int x) 2015 { 2016 int r = 1; 2017 2018 if (x == 0) 2019 return 0; 2020 if (x & 0xffff0000) { 2021 x >>= 16; 2022 r += 16; 2023 } 2024 if (x & 0xff00) { 2025 x >>= 8; 2026 r += 8; 2027 } 2028 if (x & 0xf0) { 2029 x >>= 4; 2030 r += 4; 2031 } 2032 if (x & 0xc) { 2033 x >>= 2; 2034 r += 2; 2035 } 2036 if (x & 0x2) 2037 r += 1; 2038 return r; 2039 } 2040 2041 static u16 2042 idt77252_int_to_atmfp(unsigned int rate) 2043 { 2044 u16 m, e; 2045 2046 if (rate == 0) 2047 return 0; 2048 e = idt77252_fls(rate) - 1; 2049 if (e < 9) 2050 m = (rate - (1 << e)) << (9 - e); 2051 else if (e == 9) 2052 m = (rate - (1 << e)); 2053 else /* e > 9 */ 2054 m = (rate - (1 << e)) >> (e - 9); 2055 return 0x4000 | (e << 9) | m; 2056 } 2057 2058 static u8 2059 idt77252_rate_logindex(struct idt77252_dev *card, int pcr) 2060 { 2061 u16 afp; 2062 2063 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr); 2064 if (pcr < 0) 2065 return rate_to_log[(afp >> 5) & 0x1ff]; 2066 return rate_to_log[((afp >> 5) + 1) & 0x1ff]; 2067 } 2068 2069 static void 2070 idt77252_est_timer(struct timer_list *t) 2071 { 2072 struct rate_estimator *est = from_timer(est, t, timer); 2073 struct vc_map *vc = est->vc; 2074 struct idt77252_dev *card = vc->card; 2075 unsigned long flags; 2076 u32 rate, cps; 2077 u64 ncells; 2078 u8 lacr; 2079 2080 spin_lock_irqsave(&vc->lock, flags); 2081 if (!vc->estimator) 2082 goto out; 2083 ncells = est->cells; 2084 2085 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval); 2086 est->last_cells = ncells; 2087 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log; 2088 est->cps = (est->avcps + 0x1f) >> 5; 2089 2090 cps = est->cps; 2091 if (cps < (est->maxcps >> 4)) 2092 cps = est->maxcps >> 4; 2093 2094 lacr = idt77252_rate_logindex(card, cps); 2095 if (lacr > vc->max_er) 2096 lacr = vc->max_er; 2097 2098 if (lacr != vc->lacr) { 2099 vc->lacr = lacr; 2100 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ); 2101 } 2102 2103 est->timer.expires = jiffies + ((HZ / 4) << est->interval); 2104 add_timer(&est->timer); 2105 2106 out: 2107 spin_unlock_irqrestore(&vc->lock, flags); 2108 } 2109 2110 static struct rate_estimator * 2111 idt77252_init_est(struct vc_map *vc, int pcr) 2112 { 2113 struct rate_estimator *est; 2114 2115 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL); 2116 if (!est) 2117 return NULL; 2118 est->maxcps = pcr < 0 ? -pcr : pcr; 2119 est->cps = est->maxcps; 2120 est->avcps = est->cps << 5; 2121 est->vc = vc; 2122 2123 est->interval = 2; /* XXX: make this configurable */ 2124 est->ewma_log = 2; /* XXX: make this configurable */ 2125 timer_setup(&est->timer, idt77252_est_timer, 0); 2126 mod_timer(&est->timer, jiffies + ((HZ / 4) << est->interval)); 2127 2128 return est; 2129 } 2130 2131 static int 2132 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc, 2133 struct atm_vcc *vcc, struct atm_qos *qos) 2134 { 2135 int tst_free, tst_used, tst_entries; 2136 unsigned long tmpl, modl; 2137 int tcr, tcra; 2138 2139 if ((qos->txtp.max_pcr == 0) && 2140 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) { 2141 printk("%s: trying to open a CBR VC with cell rate = 0\n", 2142 card->name); 2143 return -EINVAL; 2144 } 2145 2146 tst_used = 0; 2147 tst_free = card->tst_free; 2148 if (test_bit(VCF_TX, &vc->flags)) 2149 tst_used = vc->ntste; 2150 tst_free += tst_used; 2151 2152 tcr = atm_pcr_goal(&qos->txtp); 2153 tcra = tcr >= 0 ? tcr : -tcr; 2154 2155 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra); 2156 2157 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2); 2158 modl = tmpl % (unsigned long)card->utopia_pcr; 2159 2160 tst_entries = (int) (tmpl / card->utopia_pcr); 2161 if (tcr > 0) { 2162 if (modl > 0) 2163 tst_entries++; 2164 } else if (tcr == 0) { 2165 tst_entries = tst_free - SAR_TST_RESERVED; 2166 if (tst_entries <= 0) { 2167 printk("%s: no CBR bandwidth free.\n", card->name); 2168 return -ENOSR; 2169 } 2170 } 2171 2172 if (tst_entries == 0) { 2173 printk("%s: selected CBR bandwidth < granularity.\n", 2174 card->name); 2175 return -EINVAL; 2176 } 2177 2178 if (tst_entries > (tst_free - SAR_TST_RESERVED)) { 2179 printk("%s: not enough CBR bandwidth free.\n", card->name); 2180 return -ENOSR; 2181 } 2182 2183 vc->ntste = tst_entries; 2184 2185 card->tst_free = tst_free - tst_entries; 2186 if (test_bit(VCF_TX, &vc->flags)) { 2187 if (tst_used == tst_entries) 2188 return 0; 2189 2190 OPRINTK("%s: modify %d -> %d entries in TST.\n", 2191 card->name, tst_used, tst_entries); 2192 change_tst(card, vc, tst_entries, TSTE_OPC_CBR); 2193 return 0; 2194 } 2195 2196 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries); 2197 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR); 2198 return 0; 2199 } 2200 2201 static int 2202 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc, 2203 struct atm_vcc *vcc, struct atm_qos *qos) 2204 { 2205 struct rate_estimator *est = NULL; 2206 unsigned long flags; 2207 int tcr; 2208 2209 spin_lock_irqsave(&vc->lock, flags); 2210 if (vc->estimator) { 2211 est = vc->estimator; 2212 vc->estimator = NULL; 2213 } 2214 spin_unlock_irqrestore(&vc->lock, flags); 2215 if (est) { 2216 timer_shutdown_sync(&est->timer); 2217 kfree(est); 2218 } 2219 2220 tcr = atm_pcr_goal(&qos->txtp); 2221 if (tcr == 0) 2222 tcr = card->link_pcr; 2223 2224 vc->estimator = idt77252_init_est(vc, tcr); 2225 2226 vc->class = SCHED_UBR; 2227 vc->init_er = idt77252_rate_logindex(card, tcr); 2228 vc->lacr = vc->init_er; 2229 if (tcr < 0) 2230 vc->max_er = vc->init_er; 2231 else 2232 vc->max_er = 0xff; 2233 2234 return 0; 2235 } 2236 2237 static int 2238 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc, 2239 struct atm_vcc *vcc, struct atm_qos *qos) 2240 { 2241 int error; 2242 2243 if (test_bit(VCF_TX, &vc->flags)) 2244 return -EBUSY; 2245 2246 switch (qos->txtp.traffic_class) { 2247 case ATM_CBR: 2248 vc->class = SCHED_CBR; 2249 break; 2250 2251 case ATM_UBR: 2252 vc->class = SCHED_UBR; 2253 break; 2254 2255 case ATM_VBR: 2256 case ATM_ABR: 2257 default: 2258 return -EPROTONOSUPPORT; 2259 } 2260 2261 vc->scq = alloc_scq(card, vc->class); 2262 if (!vc->scq) { 2263 printk("%s: can't get SCQ.\n", card->name); 2264 return -ENOMEM; 2265 } 2266 2267 vc->scq->scd = get_free_scd(card, vc); 2268 if (vc->scq->scd == 0) { 2269 printk("%s: no SCD available.\n", card->name); 2270 free_scq(card, vc->scq); 2271 return -ENOMEM; 2272 } 2273 2274 fill_scd(card, vc->scq, vc->class); 2275 2276 if (set_tct(card, vc)) { 2277 printk("%s: class %d not supported.\n", 2278 card->name, qos->txtp.traffic_class); 2279 2280 card->scd2vc[vc->scd_index] = NULL; 2281 free_scq(card, vc->scq); 2282 return -EPROTONOSUPPORT; 2283 } 2284 2285 switch (vc->class) { 2286 case SCHED_CBR: 2287 error = idt77252_init_cbr(card, vc, vcc, qos); 2288 if (error) { 2289 card->scd2vc[vc->scd_index] = NULL; 2290 free_scq(card, vc->scq); 2291 return error; 2292 } 2293 2294 clear_bit(VCF_IDLE, &vc->flags); 2295 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ); 2296 break; 2297 2298 case SCHED_UBR: 2299 error = idt77252_init_ubr(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 set_bit(VCF_IDLE, &vc->flags); 2307 break; 2308 } 2309 2310 vc->tx_vcc = vcc; 2311 set_bit(VCF_TX, &vc->flags); 2312 return 0; 2313 } 2314 2315 static int 2316 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc, 2317 struct atm_vcc *vcc, struct atm_qos *qos) 2318 { 2319 unsigned long flags; 2320 unsigned long addr; 2321 u32 rcte = 0; 2322 2323 if (test_bit(VCF_RX, &vc->flags)) 2324 return -EBUSY; 2325 2326 vc->rx_vcc = vcc; 2327 set_bit(VCF_RX, &vc->flags); 2328 2329 if ((vcc->vci == 3) || (vcc->vci == 4)) 2330 return 0; 2331 2332 flush_rx_pool(card, &vc->rcv.rx_pool); 2333 2334 rcte |= SAR_RCTE_CONNECTOPEN; 2335 rcte |= SAR_RCTE_RAWCELLINTEN; 2336 2337 switch (qos->aal) { 2338 case ATM_AAL0: 2339 rcte |= SAR_RCTE_RCQ; 2340 break; 2341 case ATM_AAL1: 2342 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */ 2343 break; 2344 case ATM_AAL34: 2345 rcte |= SAR_RCTE_AAL34; 2346 break; 2347 case ATM_AAL5: 2348 rcte |= SAR_RCTE_AAL5; 2349 break; 2350 default: 2351 rcte |= SAR_RCTE_RCQ; 2352 break; 2353 } 2354 2355 if (qos->aal != ATM_AAL5) 2356 rcte |= SAR_RCTE_FBP_1; 2357 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2) 2358 rcte |= SAR_RCTE_FBP_3; 2359 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1) 2360 rcte |= SAR_RCTE_FBP_2; 2361 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0) 2362 rcte |= SAR_RCTE_FBP_1; 2363 else 2364 rcte |= SAR_RCTE_FBP_01; 2365 2366 addr = card->rct_base + (vc->index << 2); 2367 2368 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr); 2369 write_sram(card, addr, rcte); 2370 2371 spin_lock_irqsave(&card->cmd_lock, flags); 2372 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD); 2373 waitfor_idle(card); 2374 spin_unlock_irqrestore(&card->cmd_lock, flags); 2375 2376 return 0; 2377 } 2378 2379 static int 2380 idt77252_open(struct atm_vcc *vcc) 2381 { 2382 struct atm_dev *dev = vcc->dev; 2383 struct idt77252_dev *card = dev->dev_data; 2384 struct vc_map *vc; 2385 unsigned int index; 2386 unsigned int inuse; 2387 int error; 2388 int vci = vcc->vci; 2389 short vpi = vcc->vpi; 2390 2391 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) 2392 return 0; 2393 2394 if (vpi >= (1 << card->vpibits)) { 2395 printk("%s: unsupported VPI: %d\n", card->name, vpi); 2396 return -EINVAL; 2397 } 2398 2399 if (vci >= (1 << card->vcibits)) { 2400 printk("%s: unsupported VCI: %d\n", card->name, vci); 2401 return -EINVAL; 2402 } 2403 2404 set_bit(ATM_VF_ADDR, &vcc->flags); 2405 2406 mutex_lock(&card->mutex); 2407 2408 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci); 2409 2410 switch (vcc->qos.aal) { 2411 case ATM_AAL0: 2412 case ATM_AAL1: 2413 case ATM_AAL5: 2414 break; 2415 default: 2416 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal); 2417 mutex_unlock(&card->mutex); 2418 return -EPROTONOSUPPORT; 2419 } 2420 2421 index = VPCI2VC(card, vpi, vci); 2422 if (!card->vcs[index]) { 2423 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2424 if (!card->vcs[index]) { 2425 printk("%s: can't alloc vc in open()\n", card->name); 2426 mutex_unlock(&card->mutex); 2427 return -ENOMEM; 2428 } 2429 card->vcs[index]->card = card; 2430 card->vcs[index]->index = index; 2431 2432 spin_lock_init(&card->vcs[index]->lock); 2433 } 2434 vc = card->vcs[index]; 2435 2436 vcc->dev_data = vc; 2437 2438 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n", 2439 card->name, vc->index, vcc->vpi, vcc->vci, 2440 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--", 2441 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--", 2442 vcc->qos.rxtp.max_sdu); 2443 2444 inuse = 0; 2445 if (vcc->qos.txtp.traffic_class != ATM_NONE && 2446 test_bit(VCF_TX, &vc->flags)) 2447 inuse = 1; 2448 if (vcc->qos.rxtp.traffic_class != ATM_NONE && 2449 test_bit(VCF_RX, &vc->flags)) 2450 inuse += 2; 2451 2452 if (inuse) { 2453 printk("%s: %s vci already in use.\n", card->name, 2454 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx"); 2455 mutex_unlock(&card->mutex); 2456 return -EADDRINUSE; 2457 } 2458 2459 if (vcc->qos.txtp.traffic_class != ATM_NONE) { 2460 error = idt77252_init_tx(card, vc, vcc, &vcc->qos); 2461 if (error) { 2462 mutex_unlock(&card->mutex); 2463 return error; 2464 } 2465 } 2466 2467 if (vcc->qos.rxtp.traffic_class != ATM_NONE) { 2468 error = idt77252_init_rx(card, vc, vcc, &vcc->qos); 2469 if (error) { 2470 mutex_unlock(&card->mutex); 2471 return error; 2472 } 2473 } 2474 2475 set_bit(ATM_VF_READY, &vcc->flags); 2476 2477 mutex_unlock(&card->mutex); 2478 return 0; 2479 } 2480 2481 static void 2482 idt77252_close(struct atm_vcc *vcc) 2483 { 2484 struct atm_dev *dev = vcc->dev; 2485 struct idt77252_dev *card = dev->dev_data; 2486 struct vc_map *vc = vcc->dev_data; 2487 unsigned long flags; 2488 unsigned long addr; 2489 unsigned long timeout; 2490 2491 mutex_lock(&card->mutex); 2492 2493 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n", 2494 card->name, vc->index, vcc->vpi, vcc->vci); 2495 2496 clear_bit(ATM_VF_READY, &vcc->flags); 2497 2498 if (vcc->qos.rxtp.traffic_class != ATM_NONE) { 2499 2500 spin_lock_irqsave(&vc->lock, flags); 2501 clear_bit(VCF_RX, &vc->flags); 2502 vc->rx_vcc = NULL; 2503 spin_unlock_irqrestore(&vc->lock, flags); 2504 2505 if ((vcc->vci == 3) || (vcc->vci == 4)) 2506 goto done; 2507 2508 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE; 2509 2510 spin_lock_irqsave(&card->cmd_lock, flags); 2511 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD); 2512 waitfor_idle(card); 2513 spin_unlock_irqrestore(&card->cmd_lock, flags); 2514 2515 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) { 2516 DPRINTK("%s: closing a VC with pending rx buffers.\n", 2517 card->name); 2518 2519 recycle_rx_pool_skb(card, &vc->rcv.rx_pool); 2520 } 2521 } 2522 2523 done: 2524 if (vcc->qos.txtp.traffic_class != ATM_NONE) { 2525 2526 spin_lock_irqsave(&vc->lock, flags); 2527 clear_bit(VCF_TX, &vc->flags); 2528 clear_bit(VCF_IDLE, &vc->flags); 2529 clear_bit(VCF_RSV, &vc->flags); 2530 vc->tx_vcc = NULL; 2531 2532 if (vc->estimator) { 2533 timer_shutdown(&vc->estimator->timer); 2534 kfree(vc->estimator); 2535 vc->estimator = NULL; 2536 } 2537 spin_unlock_irqrestore(&vc->lock, flags); 2538 2539 timeout = 5 * 1000; 2540 while (atomic_read(&vc->scq->used) > 0) { 2541 timeout = msleep_interruptible(timeout); 2542 if (!timeout) { 2543 pr_warn("%s: SCQ drain timeout: %u used\n", 2544 card->name, atomic_read(&vc->scq->used)); 2545 break; 2546 } 2547 } 2548 2549 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ); 2550 clear_scd(card, vc->scq, vc->class); 2551 2552 if (vc->class == SCHED_CBR) { 2553 clear_tst(card, vc); 2554 card->tst_free += vc->ntste; 2555 vc->ntste = 0; 2556 } 2557 2558 card->scd2vc[vc->scd_index] = NULL; 2559 free_scq(card, vc->scq); 2560 } 2561 2562 mutex_unlock(&card->mutex); 2563 } 2564 2565 static int 2566 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags) 2567 { 2568 struct atm_dev *dev = vcc->dev; 2569 struct idt77252_dev *card = dev->dev_data; 2570 struct vc_map *vc = vcc->dev_data; 2571 int error = 0; 2572 2573 mutex_lock(&card->mutex); 2574 2575 if (qos->txtp.traffic_class != ATM_NONE) { 2576 if (!test_bit(VCF_TX, &vc->flags)) { 2577 error = idt77252_init_tx(card, vc, vcc, qos); 2578 if (error) 2579 goto out; 2580 } else { 2581 switch (qos->txtp.traffic_class) { 2582 case ATM_CBR: 2583 error = idt77252_init_cbr(card, vc, vcc, qos); 2584 if (error) 2585 goto out; 2586 break; 2587 2588 case ATM_UBR: 2589 error = idt77252_init_ubr(card, vc, vcc, qos); 2590 if (error) 2591 goto out; 2592 2593 if (!test_bit(VCF_IDLE, &vc->flags)) { 2594 writel(TCMDQ_LACR | (vc->lacr << 16) | 2595 vc->index, SAR_REG_TCMDQ); 2596 } 2597 break; 2598 2599 case ATM_VBR: 2600 case ATM_ABR: 2601 error = -EOPNOTSUPP; 2602 goto out; 2603 } 2604 } 2605 } 2606 2607 if ((qos->rxtp.traffic_class != ATM_NONE) && 2608 !test_bit(VCF_RX, &vc->flags)) { 2609 error = idt77252_init_rx(card, vc, vcc, qos); 2610 if (error) 2611 goto out; 2612 } 2613 2614 memcpy(&vcc->qos, qos, sizeof(struct atm_qos)); 2615 2616 set_bit(ATM_VF_HASQOS, &vcc->flags); 2617 2618 out: 2619 mutex_unlock(&card->mutex); 2620 return error; 2621 } 2622 2623 static int 2624 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page) 2625 { 2626 struct idt77252_dev *card = dev->dev_data; 2627 int i, left; 2628 2629 left = (int) *pos; 2630 if (!left--) 2631 return sprintf(page, "IDT77252 Interrupts:\n"); 2632 if (!left--) 2633 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]); 2634 if (!left--) 2635 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]); 2636 if (!left--) 2637 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]); 2638 if (!left--) 2639 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]); 2640 if (!left--) 2641 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]); 2642 if (!left--) 2643 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]); 2644 if (!left--) 2645 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]); 2646 if (!left--) 2647 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]); 2648 if (!left--) 2649 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]); 2650 if (!left--) 2651 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]); 2652 if (!left--) 2653 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]); 2654 if (!left--) 2655 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]); 2656 if (!left--) 2657 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]); 2658 if (!left--) 2659 return sprintf(page, "IDT77252 Transmit Connection Table:\n"); 2660 2661 for (i = 0; i < card->tct_size; i++) { 2662 unsigned long tct; 2663 struct atm_vcc *vcc; 2664 struct vc_map *vc; 2665 char *p; 2666 2667 vc = card->vcs[i]; 2668 if (!vc) 2669 continue; 2670 2671 vcc = NULL; 2672 if (vc->tx_vcc) 2673 vcc = vc->tx_vcc; 2674 if (!vcc) 2675 continue; 2676 if (left--) 2677 continue; 2678 2679 p = page; 2680 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci); 2681 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE); 2682 2683 for (i = 0; i < 8; i++) 2684 p += sprintf(p, " %08x", read_sram(card, tct + i)); 2685 p += sprintf(p, "\n"); 2686 return p - page; 2687 } 2688 return 0; 2689 } 2690 2691 /*****************************************************************************/ 2692 /* */ 2693 /* Interrupt handler */ 2694 /* */ 2695 /*****************************************************************************/ 2696 2697 static void 2698 idt77252_collect_stat(struct idt77252_dev *card) 2699 { 2700 (void) readl(SAR_REG_CDC); 2701 (void) readl(SAR_REG_VPEC); 2702 (void) readl(SAR_REG_ICC); 2703 2704 } 2705 2706 static irqreturn_t 2707 idt77252_interrupt(int irq, void *dev_id) 2708 { 2709 struct idt77252_dev *card = dev_id; 2710 u32 stat; 2711 2712 stat = readl(SAR_REG_STAT) & 0xffff; 2713 if (!stat) /* no interrupt for us */ 2714 return IRQ_NONE; 2715 2716 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) { 2717 printk("%s: Re-entering irq_handler()\n", card->name); 2718 goto out; 2719 } 2720 2721 writel(stat, SAR_REG_STAT); /* reset interrupt */ 2722 2723 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */ 2724 INTPRINTK("%s: TSIF\n", card->name); 2725 card->irqstat[15]++; 2726 idt77252_tx(card); 2727 } 2728 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */ 2729 INTPRINTK("%s: TXICP\n", card->name); 2730 card->irqstat[14]++; 2731 #ifdef CONFIG_ATM_IDT77252_DEBUG 2732 idt77252_tx_dump(card); 2733 #endif 2734 } 2735 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */ 2736 INTPRINTK("%s: TSQF\n", card->name); 2737 card->irqstat[12]++; 2738 idt77252_tx(card); 2739 } 2740 if (stat & SAR_STAT_TMROF) { /* Timer overflow */ 2741 INTPRINTK("%s: TMROF\n", card->name); 2742 card->irqstat[11]++; 2743 idt77252_collect_stat(card); 2744 } 2745 2746 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */ 2747 INTPRINTK("%s: EPDU\n", card->name); 2748 card->irqstat[5]++; 2749 idt77252_rx(card); 2750 } 2751 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */ 2752 INTPRINTK("%s: RSQAF\n", card->name); 2753 card->irqstat[1]++; 2754 idt77252_rx(card); 2755 } 2756 if (stat & SAR_STAT_RSQF) { /* RSQ is full */ 2757 INTPRINTK("%s: RSQF\n", card->name); 2758 card->irqstat[6]++; 2759 idt77252_rx(card); 2760 } 2761 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */ 2762 INTPRINTK("%s: RAWCF\n", card->name); 2763 card->irqstat[4]++; 2764 idt77252_rx_raw(card); 2765 } 2766 2767 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */ 2768 INTPRINTK("%s: PHYI", card->name); 2769 card->irqstat[10]++; 2770 if (card->atmdev->phy && card->atmdev->phy->interrupt) 2771 card->atmdev->phy->interrupt(card->atmdev); 2772 } 2773 2774 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A | 2775 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) { 2776 2777 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG); 2778 2779 INTPRINTK("%s: FBQA: %04x\n", card->name, stat); 2780 2781 if (stat & SAR_STAT_FBQ0A) 2782 card->irqstat[2]++; 2783 if (stat & SAR_STAT_FBQ1A) 2784 card->irqstat[3]++; 2785 if (stat & SAR_STAT_FBQ2A) 2786 card->irqstat[7]++; 2787 if (stat & SAR_STAT_FBQ3A) 2788 card->irqstat[8]++; 2789 2790 schedule_work(&card->tqueue); 2791 } 2792 2793 out: 2794 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags); 2795 return IRQ_HANDLED; 2796 } 2797 2798 static void 2799 idt77252_softint(struct work_struct *work) 2800 { 2801 struct idt77252_dev *card = 2802 container_of(work, struct idt77252_dev, tqueue); 2803 u32 stat; 2804 int done; 2805 2806 for (done = 1; ; done = 1) { 2807 stat = readl(SAR_REG_STAT) >> 16; 2808 2809 if ((stat & 0x0f) < SAR_FBQ0_HIGH) { 2810 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32); 2811 done = 0; 2812 } 2813 2814 stat >>= 4; 2815 if ((stat & 0x0f) < SAR_FBQ1_HIGH) { 2816 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32); 2817 done = 0; 2818 } 2819 2820 stat >>= 4; 2821 if ((stat & 0x0f) < SAR_FBQ2_HIGH) { 2822 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32); 2823 done = 0; 2824 } 2825 2826 stat >>= 4; 2827 if ((stat & 0x0f) < SAR_FBQ3_HIGH) { 2828 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32); 2829 done = 0; 2830 } 2831 2832 if (done) 2833 break; 2834 } 2835 2836 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG); 2837 } 2838 2839 2840 static int 2841 open_card_oam(struct idt77252_dev *card) 2842 { 2843 unsigned long flags; 2844 unsigned long addr; 2845 struct vc_map *vc; 2846 int vpi, vci; 2847 int index; 2848 u32 rcte; 2849 2850 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) { 2851 for (vci = 3; vci < 5; vci++) { 2852 index = VPCI2VC(card, vpi, vci); 2853 2854 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2855 if (!vc) { 2856 printk("%s: can't alloc vc\n", card->name); 2857 return -ENOMEM; 2858 } 2859 vc->index = index; 2860 card->vcs[index] = vc; 2861 2862 flush_rx_pool(card, &vc->rcv.rx_pool); 2863 2864 rcte = SAR_RCTE_CONNECTOPEN | 2865 SAR_RCTE_RAWCELLINTEN | 2866 SAR_RCTE_RCQ | 2867 SAR_RCTE_FBP_1; 2868 2869 addr = card->rct_base + (vc->index << 2); 2870 write_sram(card, addr, rcte); 2871 2872 spin_lock_irqsave(&card->cmd_lock, flags); 2873 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), 2874 SAR_REG_CMD); 2875 waitfor_idle(card); 2876 spin_unlock_irqrestore(&card->cmd_lock, flags); 2877 } 2878 } 2879 2880 return 0; 2881 } 2882 2883 static void 2884 close_card_oam(struct idt77252_dev *card) 2885 { 2886 unsigned long flags; 2887 unsigned long addr; 2888 struct vc_map *vc; 2889 int vpi, vci; 2890 int index; 2891 2892 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) { 2893 for (vci = 3; vci < 5; vci++) { 2894 index = VPCI2VC(card, vpi, vci); 2895 vc = card->vcs[index]; 2896 2897 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE; 2898 2899 spin_lock_irqsave(&card->cmd_lock, flags); 2900 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), 2901 SAR_REG_CMD); 2902 waitfor_idle(card); 2903 spin_unlock_irqrestore(&card->cmd_lock, flags); 2904 2905 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) { 2906 DPRINTK("%s: closing a VC " 2907 "with pending rx buffers.\n", 2908 card->name); 2909 2910 recycle_rx_pool_skb(card, &vc->rcv.rx_pool); 2911 } 2912 kfree(vc); 2913 } 2914 } 2915 } 2916 2917 static int 2918 open_card_ubr0(struct idt77252_dev *card) 2919 { 2920 struct vc_map *vc; 2921 2922 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2923 if (!vc) { 2924 printk("%s: can't alloc vc\n", card->name); 2925 return -ENOMEM; 2926 } 2927 card->vcs[0] = vc; 2928 vc->class = SCHED_UBR0; 2929 2930 vc->scq = alloc_scq(card, vc->class); 2931 if (!vc->scq) { 2932 printk("%s: can't get SCQ.\n", card->name); 2933 kfree(card->vcs[0]); 2934 card->vcs[0] = NULL; 2935 return -ENOMEM; 2936 } 2937 2938 card->scd2vc[0] = vc; 2939 vc->scd_index = 0; 2940 vc->scq->scd = card->scd_base; 2941 2942 fill_scd(card, vc->scq, vc->class); 2943 2944 write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base); 2945 write_sram(card, card->tct_base + 1, 0); 2946 write_sram(card, card->tct_base + 2, 0); 2947 write_sram(card, card->tct_base + 3, 0); 2948 write_sram(card, card->tct_base + 4, 0); 2949 write_sram(card, card->tct_base + 5, 0); 2950 write_sram(card, card->tct_base + 6, 0); 2951 write_sram(card, card->tct_base + 7, TCT_FLAG_UBR); 2952 2953 clear_bit(VCF_IDLE, &vc->flags); 2954 writel(TCMDQ_START | 0, SAR_REG_TCMDQ); 2955 return 0; 2956 } 2957 2958 static void 2959 close_card_ubr0(struct idt77252_dev *card) 2960 { 2961 struct vc_map *vc = card->vcs[0]; 2962 2963 free_scq(card, vc->scq); 2964 kfree(vc); 2965 } 2966 2967 static int 2968 idt77252_dev_open(struct idt77252_dev *card) 2969 { 2970 u32 conf; 2971 2972 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) { 2973 printk("%s: SAR not yet initialized.\n", card->name); 2974 return -1; 2975 } 2976 2977 conf = SAR_CFG_RXPTH| /* enable receive path */ 2978 SAR_RX_DELAY | /* interrupt on complete PDU */ 2979 SAR_CFG_RAWIE | /* interrupt enable on raw cells */ 2980 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */ 2981 SAR_CFG_TMOIE | /* interrupt on timer overflow */ 2982 SAR_CFG_FBIE | /* interrupt on low free buffers */ 2983 SAR_CFG_TXEN | /* transmit operation enable */ 2984 SAR_CFG_TXINT | /* interrupt on transmit status */ 2985 SAR_CFG_TXUIE | /* interrupt on transmit underrun */ 2986 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */ 2987 SAR_CFG_PHYIE /* enable PHY interrupts */ 2988 ; 2989 2990 #ifdef CONFIG_ATM_IDT77252_RCV_ALL 2991 /* Test RAW cell receive. */ 2992 conf |= SAR_CFG_VPECA; 2993 #endif 2994 2995 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG); 2996 2997 if (open_card_oam(card)) { 2998 printk("%s: Error initializing OAM.\n", card->name); 2999 return -1; 3000 } 3001 3002 if (open_card_ubr0(card)) { 3003 printk("%s: Error initializing UBR0.\n", card->name); 3004 return -1; 3005 } 3006 3007 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name); 3008 return 0; 3009 } 3010 3011 static void idt77252_dev_close(struct atm_dev *dev) 3012 { 3013 struct idt77252_dev *card = dev->dev_data; 3014 u32 conf; 3015 3016 close_card_ubr0(card); 3017 close_card_oam(card); 3018 3019 conf = SAR_CFG_RXPTH | /* enable receive path */ 3020 SAR_RX_DELAY | /* interrupt on complete PDU */ 3021 SAR_CFG_RAWIE | /* interrupt enable on raw cells */ 3022 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */ 3023 SAR_CFG_TMOIE | /* interrupt on timer overflow */ 3024 SAR_CFG_FBIE | /* interrupt on low free buffers */ 3025 SAR_CFG_TXEN | /* transmit operation enable */ 3026 SAR_CFG_TXINT | /* interrupt on transmit status */ 3027 SAR_CFG_TXUIE | /* interrupt on xmit underrun */ 3028 SAR_CFG_TXSFI /* interrupt on TSQ almost full */ 3029 ; 3030 3031 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG); 3032 3033 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name); 3034 } 3035 3036 3037 /*****************************************************************************/ 3038 /* */ 3039 /* Initialisation and Deinitialization of IDT77252 */ 3040 /* */ 3041 /*****************************************************************************/ 3042 3043 3044 static void 3045 deinit_card(struct idt77252_dev *card) 3046 { 3047 struct sk_buff *skb; 3048 int i, j; 3049 3050 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) { 3051 printk("%s: SAR not yet initialized.\n", card->name); 3052 return; 3053 } 3054 DIPRINTK("idt77252: deinitialize card %u\n", card->index); 3055 3056 writel(0, SAR_REG_CFG); 3057 3058 if (card->atmdev) 3059 atm_dev_deregister(card->atmdev); 3060 3061 for (i = 0; i < 4; i++) { 3062 for (j = 0; j < FBQ_SIZE; j++) { 3063 skb = card->sbpool[i].skb[j]; 3064 if (skb) { 3065 dma_unmap_single(&card->pcidev->dev, 3066 IDT77252_PRV_PADDR(skb), 3067 (skb_end_pointer(skb) - 3068 skb->data), 3069 DMA_FROM_DEVICE); 3070 card->sbpool[i].skb[j] = NULL; 3071 dev_kfree_skb(skb); 3072 } 3073 } 3074 } 3075 3076 vfree(card->soft_tst); 3077 3078 vfree(card->scd2vc); 3079 3080 vfree(card->vcs); 3081 3082 if (card->raw_cell_hnd) { 3083 dma_free_coherent(&card->pcidev->dev, 2 * sizeof(u32), 3084 card->raw_cell_hnd, card->raw_cell_paddr); 3085 } 3086 3087 if (card->rsq.base) { 3088 DIPRINTK("%s: Release RSQ ...\n", card->name); 3089 deinit_rsq(card); 3090 } 3091 3092 if (card->tsq.base) { 3093 DIPRINTK("%s: Release TSQ ...\n", card->name); 3094 deinit_tsq(card); 3095 } 3096 3097 DIPRINTK("idt77252: Release IRQ.\n"); 3098 free_irq(card->pcidev->irq, card); 3099 3100 for (i = 0; i < 4; i++) { 3101 if (card->fbq[i]) 3102 iounmap(card->fbq[i]); 3103 } 3104 3105 if (card->membase) 3106 iounmap(card->membase); 3107 3108 clear_bit(IDT77252_BIT_INIT, &card->flags); 3109 DIPRINTK("%s: Card deinitialized.\n", card->name); 3110 } 3111 3112 3113 static void init_sram(struct idt77252_dev *card) 3114 { 3115 int i; 3116 3117 for (i = 0; i < card->sramsize; i += 4) 3118 write_sram(card, (i >> 2), 0); 3119 3120 /* set SRAM layout for THIS card */ 3121 if (card->sramsize == (512 * 1024)) { 3122 card->tct_base = SAR_SRAM_TCT_128_BASE; 3123 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1) 3124 / SAR_SRAM_TCT_SIZE; 3125 card->rct_base = SAR_SRAM_RCT_128_BASE; 3126 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1) 3127 / SAR_SRAM_RCT_SIZE; 3128 card->rt_base = SAR_SRAM_RT_128_BASE; 3129 card->scd_base = SAR_SRAM_SCD_128_BASE; 3130 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1) 3131 / SAR_SRAM_SCD_SIZE; 3132 card->tst[0] = SAR_SRAM_TST1_128_BASE; 3133 card->tst[1] = SAR_SRAM_TST2_128_BASE; 3134 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1; 3135 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE; 3136 card->abrst_size = SAR_ABRSTD_SIZE_8K; 3137 card->fifo_base = SAR_SRAM_FIFO_128_BASE; 3138 card->fifo_size = SAR_RXFD_SIZE_32K; 3139 } else { 3140 card->tct_base = SAR_SRAM_TCT_32_BASE; 3141 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1) 3142 / SAR_SRAM_TCT_SIZE; 3143 card->rct_base = SAR_SRAM_RCT_32_BASE; 3144 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1) 3145 / SAR_SRAM_RCT_SIZE; 3146 card->rt_base = SAR_SRAM_RT_32_BASE; 3147 card->scd_base = SAR_SRAM_SCD_32_BASE; 3148 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1) 3149 / SAR_SRAM_SCD_SIZE; 3150 card->tst[0] = SAR_SRAM_TST1_32_BASE; 3151 card->tst[1] = SAR_SRAM_TST2_32_BASE; 3152 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1); 3153 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE; 3154 card->abrst_size = SAR_ABRSTD_SIZE_1K; 3155 card->fifo_base = SAR_SRAM_FIFO_32_BASE; 3156 card->fifo_size = SAR_RXFD_SIZE_4K; 3157 } 3158 3159 /* Initialize TCT */ 3160 for (i = 0; i < card->tct_size; i++) { 3161 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0); 3162 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0); 3163 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0); 3164 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0); 3165 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0); 3166 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0); 3167 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0); 3168 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0); 3169 } 3170 3171 /* Initialize RCT */ 3172 for (i = 0; i < card->rct_size; i++) { 3173 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE, 3174 (u32) SAR_RCTE_RAWCELLINTEN); 3175 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1, 3176 (u32) 0); 3177 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2, 3178 (u32) 0); 3179 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3, 3180 (u32) 0xffffffff); 3181 } 3182 3183 writel((SAR_FBQ0_LOW << 28) | (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0); 3184 writel((SAR_FBQ1_LOW << 28) | (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1); 3185 writel((SAR_FBQ2_LOW << 28) | (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2); 3186 writel((SAR_FBQ3_LOW << 28) | (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3); 3187 3188 /* Initialize rate table */ 3189 for (i = 0; i < 256; i++) { 3190 write_sram(card, card->rt_base + i, log_to_rate[i]); 3191 } 3192 3193 for (i = 0; i < 128; i++) { 3194 unsigned int tmp; 3195 3196 tmp = rate_to_log[(i << 2) + 0] << 0; 3197 tmp |= rate_to_log[(i << 2) + 1] << 8; 3198 tmp |= rate_to_log[(i << 2) + 2] << 16; 3199 tmp |= rate_to_log[(i << 2) + 3] << 24; 3200 write_sram(card, card->rt_base + 256 + i, tmp); 3201 } 3202 3203 #if 0 /* Fill RDF and AIR tables. */ 3204 for (i = 0; i < 128; i++) { 3205 unsigned int tmp; 3206 3207 tmp = RDF[0][(i << 1) + 0] << 16; 3208 tmp |= RDF[0][(i << 1) + 1] << 0; 3209 write_sram(card, card->rt_base + 512 + i, tmp); 3210 } 3211 3212 for (i = 0; i < 128; i++) { 3213 unsigned int tmp; 3214 3215 tmp = AIR[0][(i << 1) + 0] << 16; 3216 tmp |= AIR[0][(i << 1) + 1] << 0; 3217 write_sram(card, card->rt_base + 640 + i, tmp); 3218 } 3219 #endif 3220 3221 IPRINTK("%s: initialize rate table ...\n", card->name); 3222 writel(card->rt_base << 2, SAR_REG_RTBL); 3223 3224 /* Initialize TSTs */ 3225 IPRINTK("%s: initialize TST ...\n", card->name); 3226 card->tst_free = card->tst_size - 2; /* last two are jumps */ 3227 3228 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++) 3229 write_sram(card, i, TSTE_OPC_VAR); 3230 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2)); 3231 idt77252_sram_write_errors = 1; 3232 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2)); 3233 idt77252_sram_write_errors = 0; 3234 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++) 3235 write_sram(card, i, TSTE_OPC_VAR); 3236 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2)); 3237 idt77252_sram_write_errors = 1; 3238 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2)); 3239 idt77252_sram_write_errors = 0; 3240 3241 card->tst_index = 0; 3242 writel(card->tst[0] << 2, SAR_REG_TSTB); 3243 3244 /* Initialize ABRSTD and Receive FIFO */ 3245 IPRINTK("%s: initialize ABRSTD ...\n", card->name); 3246 writel(card->abrst_size | (card->abrst_base << 2), 3247 SAR_REG_ABRSTD); 3248 3249 IPRINTK("%s: initialize receive fifo ...\n", card->name); 3250 writel(card->fifo_size | (card->fifo_base << 2), 3251 SAR_REG_RXFD); 3252 3253 IPRINTK("%s: SRAM initialization complete.\n", card->name); 3254 } 3255 3256 static int init_card(struct atm_dev *dev) 3257 { 3258 struct idt77252_dev *card = dev->dev_data; 3259 struct pci_dev *pcidev = card->pcidev; 3260 unsigned long tmpl, modl; 3261 unsigned int linkrate, rsvdcr; 3262 unsigned int tst_entries; 3263 struct net_device *tmp; 3264 char tname[10]; 3265 3266 u32 size; 3267 u_char pci_byte; 3268 u32 conf; 3269 int i, k; 3270 3271 if (test_bit(IDT77252_BIT_INIT, &card->flags)) { 3272 printk("Error: SAR already initialized.\n"); 3273 return -1; 3274 } 3275 3276 /*****************************************************************/ 3277 /* P C I C O N F I G U R A T I O N */ 3278 /*****************************************************************/ 3279 3280 /* Set PCI Retry-Timeout and TRDY timeout */ 3281 IPRINTK("%s: Checking PCI retries.\n", card->name); 3282 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) { 3283 printk("%s: can't read PCI retry timeout.\n", card->name); 3284 deinit_card(card); 3285 return -1; 3286 } 3287 if (pci_byte != 0) { 3288 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n", 3289 card->name, pci_byte); 3290 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) { 3291 printk("%s: can't set PCI retry timeout.\n", 3292 card->name); 3293 deinit_card(card); 3294 return -1; 3295 } 3296 } 3297 IPRINTK("%s: Checking PCI TRDY.\n", card->name); 3298 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) { 3299 printk("%s: can't read PCI TRDY timeout.\n", card->name); 3300 deinit_card(card); 3301 return -1; 3302 } 3303 if (pci_byte != 0) { 3304 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n", 3305 card->name, pci_byte); 3306 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) { 3307 printk("%s: can't set PCI TRDY timeout.\n", card->name); 3308 deinit_card(card); 3309 return -1; 3310 } 3311 } 3312 /* Reset Timer register */ 3313 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) { 3314 printk("%s: resetting timer overflow.\n", card->name); 3315 writel(SAR_STAT_TMROF, SAR_REG_STAT); 3316 } 3317 IPRINTK("%s: Request IRQ ... ", card->name); 3318 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED, 3319 card->name, card) != 0) { 3320 printk("%s: can't allocate IRQ.\n", card->name); 3321 deinit_card(card); 3322 return -1; 3323 } 3324 IPRINTK("got %d.\n", pcidev->irq); 3325 3326 /*****************************************************************/ 3327 /* C H E C K A N D I N I T S R A M */ 3328 /*****************************************************************/ 3329 3330 IPRINTK("%s: Initializing SRAM\n", card->name); 3331 3332 /* preset size of connecton table, so that init_sram() knows about it */ 3333 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */ 3334 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */ 3335 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */ 3336 #ifndef ATM_IDT77252_SEND_IDLE 3337 SAR_CFG_NO_IDLE | /* Do not send idle cells */ 3338 #endif 3339 0; 3340 3341 if (card->sramsize == (512 * 1024)) 3342 conf |= SAR_CFG_CNTBL_1k; 3343 else 3344 conf |= SAR_CFG_CNTBL_512; 3345 3346 switch (vpibits) { 3347 case 0: 3348 conf |= SAR_CFG_VPVCS_0; 3349 break; 3350 default: 3351 case 1: 3352 conf |= SAR_CFG_VPVCS_1; 3353 break; 3354 case 2: 3355 conf |= SAR_CFG_VPVCS_2; 3356 break; 3357 case 8: 3358 conf |= SAR_CFG_VPVCS_8; 3359 break; 3360 } 3361 3362 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG); 3363 3364 init_sram(card); 3365 3366 /********************************************************************/ 3367 /* 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 */ 3368 /********************************************************************/ 3369 /* Initialize TSQ */ 3370 if (0 != init_tsq(card)) { 3371 deinit_card(card); 3372 return -1; 3373 } 3374 /* Initialize RSQ */ 3375 if (0 != init_rsq(card)) { 3376 deinit_card(card); 3377 return -1; 3378 } 3379 3380 card->vpibits = vpibits; 3381 if (card->sramsize == (512 * 1024)) { 3382 card->vcibits = 10 - card->vpibits; 3383 } else { 3384 card->vcibits = 9 - card->vpibits; 3385 } 3386 3387 card->vcimask = 0; 3388 for (k = 0, i = 1; k < card->vcibits; k++) { 3389 card->vcimask |= i; 3390 i <<= 1; 3391 } 3392 3393 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name); 3394 writel(0, SAR_REG_VPM); 3395 3396 /* Little Endian Order */ 3397 writel(0, SAR_REG_GP); 3398 3399 /* Initialize RAW Cell Handle Register */ 3400 card->raw_cell_hnd = dma_alloc_coherent(&card->pcidev->dev, 3401 2 * sizeof(u32), 3402 &card->raw_cell_paddr, 3403 GFP_KERNEL); 3404 if (!card->raw_cell_hnd) { 3405 printk("%s: memory allocation failure.\n", card->name); 3406 deinit_card(card); 3407 return -1; 3408 } 3409 writel(card->raw_cell_paddr, SAR_REG_RAWHND); 3410 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name, 3411 card->raw_cell_hnd); 3412 3413 size = sizeof(struct vc_map *) * card->tct_size; 3414 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size); 3415 card->vcs = vzalloc(size); 3416 if (!card->vcs) { 3417 printk("%s: memory allocation failure.\n", card->name); 3418 deinit_card(card); 3419 return -1; 3420 } 3421 3422 size = sizeof(struct vc_map *) * card->scd_size; 3423 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n", 3424 card->name, size); 3425 card->scd2vc = vzalloc(size); 3426 if (!card->scd2vc) { 3427 printk("%s: memory allocation failure.\n", card->name); 3428 deinit_card(card); 3429 return -1; 3430 } 3431 3432 size = sizeof(struct tst_info) * (card->tst_size - 2); 3433 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n", 3434 card->name, size); 3435 card->soft_tst = vmalloc(size); 3436 if (!card->soft_tst) { 3437 printk("%s: memory allocation failure.\n", card->name); 3438 deinit_card(card); 3439 return -1; 3440 } 3441 for (i = 0; i < card->tst_size - 2; i++) { 3442 card->soft_tst[i].tste = TSTE_OPC_VAR; 3443 card->soft_tst[i].vc = NULL; 3444 } 3445 3446 if (dev->phy == NULL) { 3447 printk("%s: No LT device defined.\n", card->name); 3448 deinit_card(card); 3449 return -1; 3450 } 3451 if (dev->phy->ioctl == NULL) { 3452 printk("%s: LT had no IOCTL function defined.\n", card->name); 3453 deinit_card(card); 3454 return -1; 3455 } 3456 3457 #ifdef CONFIG_ATM_IDT77252_USE_SUNI 3458 /* 3459 * this is a jhs hack to get around special functionality in the 3460 * phy driver for the atecom hardware; the functionality doesn't 3461 * exist in the linux atm suni driver 3462 * 3463 * it isn't the right way to do things, but as the guy from NIST 3464 * said, talking about their measurement of the fine structure 3465 * constant, "it's good enough for government work." 3466 */ 3467 linkrate = 149760000; 3468 #endif 3469 3470 card->link_pcr = (linkrate / 8 / 53); 3471 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n", 3472 card->name, linkrate, card->link_pcr); 3473 3474 #ifdef ATM_IDT77252_SEND_IDLE 3475 card->utopia_pcr = card->link_pcr; 3476 #else 3477 card->utopia_pcr = (160000000 / 8 / 54); 3478 #endif 3479 3480 rsvdcr = 0; 3481 if (card->utopia_pcr > card->link_pcr) 3482 rsvdcr = card->utopia_pcr - card->link_pcr; 3483 3484 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2); 3485 modl = tmpl % (unsigned long)card->utopia_pcr; 3486 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr); 3487 if (modl) 3488 tst_entries++; 3489 card->tst_free -= tst_entries; 3490 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL); 3491 3492 #ifdef HAVE_EEPROM 3493 idt77252_eeprom_init(card); 3494 printk("%s: EEPROM: %02x:", card->name, 3495 idt77252_eeprom_read_status(card)); 3496 3497 for (i = 0; i < 0x80; i++) { 3498 printk(" %02x", 3499 idt77252_eeprom_read_byte(card, i) 3500 ); 3501 } 3502 printk("\n"); 3503 #endif /* HAVE_EEPROM */ 3504 3505 /* 3506 * XXX: <hack> 3507 */ 3508 sprintf(tname, "eth%d", card->index); 3509 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */ 3510 if (tmp) { 3511 memcpy(card->atmdev->esi, tmp->dev_addr, 6); 3512 dev_put(tmp); 3513 printk("%s: ESI %pM\n", card->name, card->atmdev->esi); 3514 } 3515 /* 3516 * XXX: </hack> 3517 */ 3518 3519 /* Set Maximum Deficit Count for now. */ 3520 writel(0xffff, SAR_REG_MDFCT); 3521 3522 set_bit(IDT77252_BIT_INIT, &card->flags); 3523 3524 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name); 3525 return 0; 3526 } 3527 3528 3529 /*****************************************************************************/ 3530 /* */ 3531 /* Probing of IDT77252 ABR SAR */ 3532 /* */ 3533 /*****************************************************************************/ 3534 3535 3536 static int idt77252_preset(struct idt77252_dev *card) 3537 { 3538 u16 pci_command; 3539 3540 /*****************************************************************/ 3541 /* P C I C O N F I G U R A T I O N */ 3542 /*****************************************************************/ 3543 3544 XPRINTK("%s: Enable PCI master and memory access for SAR.\n", 3545 card->name); 3546 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) { 3547 printk("%s: can't read PCI_COMMAND.\n", card->name); 3548 deinit_card(card); 3549 return -1; 3550 } 3551 if (!(pci_command & PCI_COMMAND_IO)) { 3552 printk("%s: PCI_COMMAND: %04x (?)\n", 3553 card->name, pci_command); 3554 deinit_card(card); 3555 return (-1); 3556 } 3557 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 3558 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) { 3559 printk("%s: can't write PCI_COMMAND.\n", card->name); 3560 deinit_card(card); 3561 return -1; 3562 } 3563 /*****************************************************************/ 3564 /* G E N E R I C R E S E T */ 3565 /*****************************************************************/ 3566 3567 /* Software reset */ 3568 writel(SAR_CFG_SWRST, SAR_REG_CFG); 3569 mdelay(1); 3570 writel(0, SAR_REG_CFG); 3571 3572 IPRINTK("%s: Software resetted.\n", card->name); 3573 return 0; 3574 } 3575 3576 3577 static unsigned long probe_sram(struct idt77252_dev *card) 3578 { 3579 u32 data, addr; 3580 3581 writel(0, SAR_REG_DR0); 3582 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD); 3583 3584 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) { 3585 writel(ATM_POISON, SAR_REG_DR0); 3586 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD); 3587 3588 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD); 3589 data = readl(SAR_REG_DR0); 3590 3591 if (data != 0) 3592 break; 3593 } 3594 3595 return addr * sizeof(u32); 3596 } 3597 3598 static int idt77252_init_one(struct pci_dev *pcidev, 3599 const struct pci_device_id *id) 3600 { 3601 static struct idt77252_dev **last = &idt77252_chain; 3602 static int index = 0; 3603 3604 unsigned long membase, srambase; 3605 struct idt77252_dev *card; 3606 struct atm_dev *dev; 3607 int i, err; 3608 3609 3610 if ((err = pci_enable_device(pcidev))) { 3611 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev)); 3612 return err; 3613 } 3614 3615 if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) { 3616 printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev)); 3617 goto err_out_disable_pdev; 3618 } 3619 3620 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL); 3621 if (!card) { 3622 printk("idt77252-%d: can't allocate private data\n", index); 3623 err = -ENOMEM; 3624 goto err_out_disable_pdev; 3625 } 3626 card->revision = pcidev->revision; 3627 card->index = index; 3628 card->pcidev = pcidev; 3629 sprintf(card->name, "idt77252-%d", card->index); 3630 3631 INIT_WORK(&card->tqueue, idt77252_softint); 3632 3633 membase = pci_resource_start(pcidev, 1); 3634 srambase = pci_resource_start(pcidev, 2); 3635 3636 mutex_init(&card->mutex); 3637 spin_lock_init(&card->cmd_lock); 3638 spin_lock_init(&card->tst_lock); 3639 3640 timer_setup(&card->tst_timer, tst_timer, 0); 3641 3642 /* Do the I/O remapping... */ 3643 card->membase = ioremap(membase, 1024); 3644 if (!card->membase) { 3645 printk("%s: can't ioremap() membase\n", card->name); 3646 err = -EIO; 3647 goto err_out_free_card; 3648 } 3649 3650 if (idt77252_preset(card)) { 3651 printk("%s: preset failed\n", card->name); 3652 err = -EIO; 3653 goto err_out_iounmap; 3654 } 3655 3656 dev = atm_dev_register("idt77252", &pcidev->dev, &idt77252_ops, -1, 3657 NULL); 3658 if (!dev) { 3659 printk("%s: can't register atm device\n", card->name); 3660 err = -EIO; 3661 goto err_out_iounmap; 3662 } 3663 dev->dev_data = card; 3664 card->atmdev = dev; 3665 3666 #ifdef CONFIG_ATM_IDT77252_USE_SUNI 3667 suni_init(dev); 3668 if (!dev->phy) { 3669 printk("%s: can't init SUNI\n", card->name); 3670 err = -EIO; 3671 goto err_out_deinit_card; 3672 } 3673 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */ 3674 3675 card->sramsize = probe_sram(card); 3676 3677 for (i = 0; i < 4; i++) { 3678 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4); 3679 if (!card->fbq[i]) { 3680 printk("%s: can't ioremap() FBQ%d\n", card->name, i); 3681 err = -EIO; 3682 goto err_out_deinit_card; 3683 } 3684 } 3685 3686 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n", 3687 card->name, ((card->revision > 1) && (card->revision < 25)) ? 3688 'A' + card->revision - 1 : '?', membase, srambase, 3689 card->sramsize / 1024); 3690 3691 if (init_card(dev)) { 3692 printk("%s: init_card failed\n", card->name); 3693 err = -EIO; 3694 goto err_out_deinit_card; 3695 } 3696 3697 dev->ci_range.vpi_bits = card->vpibits; 3698 dev->ci_range.vci_bits = card->vcibits; 3699 dev->link_rate = card->link_pcr; 3700 3701 if (dev->phy->start) 3702 dev->phy->start(dev); 3703 3704 if (idt77252_dev_open(card)) { 3705 printk("%s: dev_open failed\n", card->name); 3706 err = -EIO; 3707 goto err_out_stop; 3708 } 3709 3710 *last = card; 3711 last = &card->next; 3712 index++; 3713 3714 return 0; 3715 3716 err_out_stop: 3717 if (dev->phy->stop) 3718 dev->phy->stop(dev); 3719 3720 err_out_deinit_card: 3721 deinit_card(card); 3722 3723 err_out_iounmap: 3724 iounmap(card->membase); 3725 3726 err_out_free_card: 3727 kfree(card); 3728 3729 err_out_disable_pdev: 3730 pci_disable_device(pcidev); 3731 return err; 3732 } 3733 3734 static const struct pci_device_id idt77252_pci_tbl[] = 3735 { 3736 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 }, 3737 { 0, } 3738 }; 3739 3740 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl); 3741 3742 static struct pci_driver idt77252_driver = { 3743 .name = "idt77252", 3744 .id_table = idt77252_pci_tbl, 3745 .probe = idt77252_init_one, 3746 }; 3747 3748 static int __init idt77252_init(void) 3749 { 3750 struct sk_buff *skb; 3751 3752 printk("%s: at %p\n", __func__, idt77252_init); 3753 BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct idt77252_skb_prv) + sizeof(struct atm_skb_data)); 3754 return pci_register_driver(&idt77252_driver); 3755 } 3756 3757 static void __exit idt77252_exit(void) 3758 { 3759 struct idt77252_dev *card; 3760 struct atm_dev *dev; 3761 3762 pci_unregister_driver(&idt77252_driver); 3763 3764 while (idt77252_chain) { 3765 card = idt77252_chain; 3766 dev = card->atmdev; 3767 idt77252_chain = card->next; 3768 timer_shutdown_sync(&card->tst_timer); 3769 3770 if (dev->phy->stop) 3771 dev->phy->stop(dev); 3772 deinit_card(card); 3773 pci_disable_device(card->pcidev); 3774 kfree(card); 3775 } 3776 3777 DIPRINTK("idt77252: finished cleanup-module().\n"); 3778 } 3779 3780 module_init(idt77252_init); 3781 module_exit(idt77252_exit); 3782 3783 MODULE_LICENSE("GPL"); 3784 3785 module_param(vpibits, uint, 0); 3786 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)"); 3787 #ifdef CONFIG_ATM_IDT77252_DEBUG 3788 module_param(debug, ulong, 0644); 3789 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h"); 3790 #endif 3791 3792 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>"); 3793 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver"); 3794