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_zalloc_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; 838 839 if (skb->len == 0) { 840 printk("%s: invalid skb->len (%d)\n", card->name, skb->len); 841 return -EINVAL; 842 } 843 844 TXPRINTK("%s: Sending %d bytes of data.\n", 845 card->name, skb->len); 846 847 tbd = &IDT77252_PRV_TBD(skb); 848 vcc = ATM_SKB(skb)->vcc; 849 850 IDT77252_PRV_PADDR(skb) = dma_map_single(&card->pcidev->dev, skb->data, 851 skb->len, DMA_TO_DEVICE); 852 853 error = -EINVAL; 854 855 if (oam) { 856 if (skb->len != 52) 857 goto errout; 858 859 tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU; 860 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4; 861 tbd->word_3 = 0x00000000; 862 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) | 863 (skb->data[2] << 8) | (skb->data[3] << 0); 864 865 if (test_bit(VCF_RSV, &vc->flags)) 866 vc = card->vcs[0]; 867 868 goto done; 869 } 870 871 if (test_bit(VCF_RSV, &vc->flags)) { 872 printk("%s: Trying to transmit on reserved VC\n", card->name); 873 goto errout; 874 } 875 876 aal = vcc->qos.aal; 877 878 switch (aal) { 879 case ATM_AAL0: 880 case ATM_AAL34: 881 if (skb->len > 52) 882 goto errout; 883 884 if (aal == ATM_AAL0) 885 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 | 886 ATM_CELL_PAYLOAD; 887 else 888 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 | 889 ATM_CELL_PAYLOAD; 890 891 tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4; 892 tbd->word_3 = 0x00000000; 893 tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) | 894 (skb->data[2] << 8) | (skb->data[3] << 0); 895 break; 896 897 case ATM_AAL5: 898 tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len; 899 tbd->word_2 = IDT77252_PRV_PADDR(skb); 900 tbd->word_3 = skb->len; 901 tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) | 902 (vcc->vci << SAR_TBD_VCI_SHIFT); 903 break; 904 905 case ATM_AAL1: 906 case ATM_AAL2: 907 default: 908 printk("%s: Traffic type not supported.\n", card->name); 909 error = -EPROTONOSUPPORT; 910 goto errout; 911 } 912 913 done: 914 spin_lock_irqsave(&vc->scq->skblock, flags); 915 skb_queue_tail(&vc->scq->pending, skb); 916 917 while ((skb = skb_dequeue(&vc->scq->pending))) { 918 if (push_on_scq(card, vc, skb)) { 919 skb_queue_head(&vc->scq->pending, skb); 920 break; 921 } 922 } 923 spin_unlock_irqrestore(&vc->scq->skblock, flags); 924 925 return 0; 926 927 errout: 928 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 929 skb->len, DMA_TO_DEVICE); 930 return error; 931 } 932 933 static unsigned long 934 get_free_scd(struct idt77252_dev *card, struct vc_map *vc) 935 { 936 int i; 937 938 for (i = 0; i < card->scd_size; i++) { 939 if (!card->scd2vc[i]) { 940 card->scd2vc[i] = vc; 941 vc->scd_index = i; 942 return card->scd_base + i * SAR_SRAM_SCD_SIZE; 943 } 944 } 945 return 0; 946 } 947 948 static void 949 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class) 950 { 951 write_sram(card, scq->scd, scq->paddr); 952 write_sram(card, scq->scd + 1, 0x00000000); 953 write_sram(card, scq->scd + 2, 0xffffffff); 954 write_sram(card, scq->scd + 3, 0x00000000); 955 } 956 957 static void 958 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class) 959 { 960 return; 961 } 962 963 /*****************************************************************************/ 964 /* */ 965 /* RSQ Handling */ 966 /* */ 967 /*****************************************************************************/ 968 969 static int 970 init_rsq(struct idt77252_dev *card) 971 { 972 struct rsq_entry *rsqe; 973 974 card->rsq.base = dma_zalloc_coherent(&card->pcidev->dev, RSQSIZE, 975 &card->rsq.paddr, GFP_KERNEL); 976 if (card->rsq.base == NULL) { 977 printk("%s: can't allocate RSQ.\n", card->name); 978 return -1; 979 } 980 981 card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1; 982 card->rsq.next = card->rsq.last; 983 for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++) 984 rsqe->word_4 = 0; 985 986 writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base, 987 SAR_REG_RSQH); 988 writel(card->rsq.paddr, SAR_REG_RSQB); 989 990 IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name, 991 (unsigned long) card->rsq.base, 992 readl(SAR_REG_RSQB)); 993 IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n", 994 card->name, 995 readl(SAR_REG_RSQH), 996 readl(SAR_REG_RSQB), 997 readl(SAR_REG_RSQT)); 998 999 return 0; 1000 } 1001 1002 static void 1003 deinit_rsq(struct idt77252_dev *card) 1004 { 1005 dma_free_coherent(&card->pcidev->dev, RSQSIZE, 1006 card->rsq.base, card->rsq.paddr); 1007 } 1008 1009 static void 1010 dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe) 1011 { 1012 struct atm_vcc *vcc; 1013 struct sk_buff *skb; 1014 struct rx_pool *rpp; 1015 struct vc_map *vc; 1016 u32 header, vpi, vci; 1017 u32 stat; 1018 int i; 1019 1020 stat = le32_to_cpu(rsqe->word_4); 1021 1022 if (stat & SAR_RSQE_IDLE) { 1023 RXPRINTK("%s: message about inactive connection.\n", 1024 card->name); 1025 return; 1026 } 1027 1028 skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2)); 1029 if (skb == NULL) { 1030 printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n", 1031 card->name, __func__, 1032 le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2), 1033 le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4)); 1034 return; 1035 } 1036 1037 header = le32_to_cpu(rsqe->word_1); 1038 vpi = (header >> 16) & 0x00ff; 1039 vci = (header >> 0) & 0xffff; 1040 1041 RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n", 1042 card->name, vpi, vci, skb, skb->data); 1043 1044 if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) { 1045 printk("%s: SDU received for out-of-range vc %u.%u\n", 1046 card->name, vpi, vci); 1047 recycle_rx_skb(card, skb); 1048 return; 1049 } 1050 1051 vc = card->vcs[VPCI2VC(card, vpi, vci)]; 1052 if (!vc || !test_bit(VCF_RX, &vc->flags)) { 1053 printk("%s: SDU received on non RX vc %u.%u\n", 1054 card->name, vpi, vci); 1055 recycle_rx_skb(card, skb); 1056 return; 1057 } 1058 1059 vcc = vc->rx_vcc; 1060 1061 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1062 skb_end_pointer(skb) - skb->data, 1063 DMA_FROM_DEVICE); 1064 1065 if ((vcc->qos.aal == ATM_AAL0) || 1066 (vcc->qos.aal == ATM_AAL34)) { 1067 struct sk_buff *sb; 1068 unsigned char *cell; 1069 u32 aal0; 1070 1071 cell = skb->data; 1072 for (i = (stat & SAR_RSQE_CELLCNT); i; i--) { 1073 if ((sb = dev_alloc_skb(64)) == NULL) { 1074 printk("%s: Can't allocate buffers for aal0.\n", 1075 card->name); 1076 atomic_add(i, &vcc->stats->rx_drop); 1077 break; 1078 } 1079 if (!atm_charge(vcc, sb->truesize)) { 1080 RXPRINTK("%s: atm_charge() dropped aal0 packets.\n", 1081 card->name); 1082 atomic_add(i - 1, &vcc->stats->rx_drop); 1083 dev_kfree_skb(sb); 1084 break; 1085 } 1086 aal0 = (vpi << ATM_HDR_VPI_SHIFT) | 1087 (vci << ATM_HDR_VCI_SHIFT); 1088 aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0; 1089 aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0; 1090 1091 *((u32 *) sb->data) = aal0; 1092 skb_put(sb, sizeof(u32)); 1093 skb_put_data(sb, cell, ATM_CELL_PAYLOAD); 1094 1095 ATM_SKB(sb)->vcc = vcc; 1096 __net_timestamp(sb); 1097 vcc->push(vcc, sb); 1098 atomic_inc(&vcc->stats->rx); 1099 1100 cell += ATM_CELL_PAYLOAD; 1101 } 1102 1103 recycle_rx_skb(card, skb); 1104 return; 1105 } 1106 if (vcc->qos.aal != ATM_AAL5) { 1107 printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n", 1108 card->name, vcc->qos.aal); 1109 recycle_rx_skb(card, skb); 1110 return; 1111 } 1112 skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD; 1113 1114 rpp = &vc->rcv.rx_pool; 1115 1116 __skb_queue_tail(&rpp->queue, skb); 1117 rpp->len += skb->len; 1118 1119 if (stat & SAR_RSQE_EPDU) { 1120 unsigned char *l1l2; 1121 unsigned int len; 1122 1123 l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6); 1124 1125 len = (l1l2[0] << 8) | l1l2[1]; 1126 len = len ? len : 0x10000; 1127 1128 RXPRINTK("%s: PDU has %d bytes.\n", card->name, len); 1129 1130 if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) { 1131 RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. " 1132 "(CDC: %08x)\n", 1133 card->name, len, rpp->len, readl(SAR_REG_CDC)); 1134 recycle_rx_pool_skb(card, rpp); 1135 atomic_inc(&vcc->stats->rx_err); 1136 return; 1137 } 1138 if (stat & SAR_RSQE_CRC) { 1139 RXPRINTK("%s: AAL5 CRC error.\n", card->name); 1140 recycle_rx_pool_skb(card, rpp); 1141 atomic_inc(&vcc->stats->rx_err); 1142 return; 1143 } 1144 if (skb_queue_len(&rpp->queue) > 1) { 1145 struct sk_buff *sb; 1146 1147 skb = dev_alloc_skb(rpp->len); 1148 if (!skb) { 1149 RXPRINTK("%s: Can't alloc RX skb.\n", 1150 card->name); 1151 recycle_rx_pool_skb(card, rpp); 1152 atomic_inc(&vcc->stats->rx_err); 1153 return; 1154 } 1155 if (!atm_charge(vcc, skb->truesize)) { 1156 recycle_rx_pool_skb(card, rpp); 1157 dev_kfree_skb(skb); 1158 return; 1159 } 1160 skb_queue_walk(&rpp->queue, sb) 1161 skb_put_data(skb, sb->data, sb->len); 1162 1163 recycle_rx_pool_skb(card, rpp); 1164 1165 skb_trim(skb, len); 1166 ATM_SKB(skb)->vcc = vcc; 1167 __net_timestamp(skb); 1168 1169 vcc->push(vcc, skb); 1170 atomic_inc(&vcc->stats->rx); 1171 1172 return; 1173 } 1174 1175 flush_rx_pool(card, rpp); 1176 1177 if (!atm_charge(vcc, skb->truesize)) { 1178 recycle_rx_skb(card, skb); 1179 return; 1180 } 1181 1182 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1183 skb_end_pointer(skb) - skb->data, 1184 DMA_FROM_DEVICE); 1185 sb_pool_remove(card, skb); 1186 1187 skb_trim(skb, len); 1188 ATM_SKB(skb)->vcc = vcc; 1189 __net_timestamp(skb); 1190 1191 vcc->push(vcc, skb); 1192 atomic_inc(&vcc->stats->rx); 1193 1194 if (skb->truesize > SAR_FB_SIZE_3) 1195 add_rx_skb(card, 3, SAR_FB_SIZE_3, 1); 1196 else if (skb->truesize > SAR_FB_SIZE_2) 1197 add_rx_skb(card, 2, SAR_FB_SIZE_2, 1); 1198 else if (skb->truesize > SAR_FB_SIZE_1) 1199 add_rx_skb(card, 1, SAR_FB_SIZE_1, 1); 1200 else 1201 add_rx_skb(card, 0, SAR_FB_SIZE_0, 1); 1202 return; 1203 } 1204 } 1205 1206 static void 1207 idt77252_rx(struct idt77252_dev *card) 1208 { 1209 struct rsq_entry *rsqe; 1210 1211 if (card->rsq.next == card->rsq.last) 1212 rsqe = card->rsq.base; 1213 else 1214 rsqe = card->rsq.next + 1; 1215 1216 if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) { 1217 RXPRINTK("%s: no entry in RSQ.\n", card->name); 1218 return; 1219 } 1220 1221 do { 1222 dequeue_rx(card, rsqe); 1223 rsqe->word_4 = 0; 1224 card->rsq.next = rsqe; 1225 if (card->rsq.next == card->rsq.last) 1226 rsqe = card->rsq.base; 1227 else 1228 rsqe = card->rsq.next + 1; 1229 } while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID); 1230 1231 writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base, 1232 SAR_REG_RSQH); 1233 } 1234 1235 static void 1236 idt77252_rx_raw(struct idt77252_dev *card) 1237 { 1238 struct sk_buff *queue; 1239 u32 head, tail; 1240 struct atm_vcc *vcc; 1241 struct vc_map *vc; 1242 struct sk_buff *sb; 1243 1244 if (card->raw_cell_head == NULL) { 1245 u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1)); 1246 card->raw_cell_head = sb_pool_skb(card, handle); 1247 } 1248 1249 queue = card->raw_cell_head; 1250 if (!queue) 1251 return; 1252 1253 head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16); 1254 tail = readl(SAR_REG_RAWCT); 1255 1256 dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(queue), 1257 skb_end_offset(queue) - 16, 1258 DMA_FROM_DEVICE); 1259 1260 while (head != tail) { 1261 unsigned int vpi, vci; 1262 u32 header; 1263 1264 header = le32_to_cpu(*(u32 *) &queue->data[0]); 1265 1266 vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT; 1267 vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT; 1268 1269 #ifdef CONFIG_ATM_IDT77252_DEBUG 1270 if (debug & DBG_RAW_CELL) { 1271 int i; 1272 1273 printk("%s: raw cell %x.%02x.%04x.%x.%x\n", 1274 card->name, (header >> 28) & 0x000f, 1275 (header >> 20) & 0x00ff, 1276 (header >> 4) & 0xffff, 1277 (header >> 1) & 0x0007, 1278 (header >> 0) & 0x0001); 1279 for (i = 16; i < 64; i++) 1280 printk(" %02x", queue->data[i]); 1281 printk("\n"); 1282 } 1283 #endif 1284 1285 if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) { 1286 RPRINTK("%s: SDU received for out-of-range vc %u.%u\n", 1287 card->name, vpi, vci); 1288 goto drop; 1289 } 1290 1291 vc = card->vcs[VPCI2VC(card, vpi, vci)]; 1292 if (!vc || !test_bit(VCF_RX, &vc->flags)) { 1293 RPRINTK("%s: SDU received on non RX vc %u.%u\n", 1294 card->name, vpi, vci); 1295 goto drop; 1296 } 1297 1298 vcc = vc->rx_vcc; 1299 1300 if (vcc->qos.aal != ATM_AAL0) { 1301 RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n", 1302 card->name, vpi, vci); 1303 atomic_inc(&vcc->stats->rx_drop); 1304 goto drop; 1305 } 1306 1307 if ((sb = dev_alloc_skb(64)) == NULL) { 1308 printk("%s: Can't allocate buffers for AAL0.\n", 1309 card->name); 1310 atomic_inc(&vcc->stats->rx_err); 1311 goto drop; 1312 } 1313 1314 if (!atm_charge(vcc, sb->truesize)) { 1315 RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n", 1316 card->name); 1317 dev_kfree_skb(sb); 1318 goto drop; 1319 } 1320 1321 *((u32 *) sb->data) = header; 1322 skb_put(sb, sizeof(u32)); 1323 skb_put_data(sb, &(queue->data[16]), ATM_CELL_PAYLOAD); 1324 1325 ATM_SKB(sb)->vcc = vcc; 1326 __net_timestamp(sb); 1327 vcc->push(vcc, sb); 1328 atomic_inc(&vcc->stats->rx); 1329 1330 drop: 1331 skb_pull(queue, 64); 1332 1333 head = IDT77252_PRV_PADDR(queue) 1334 + (queue->data - queue->head - 16); 1335 1336 if (queue->len < 128) { 1337 struct sk_buff *next; 1338 u32 handle; 1339 1340 head = le32_to_cpu(*(u32 *) &queue->data[0]); 1341 handle = le32_to_cpu(*(u32 *) &queue->data[4]); 1342 1343 next = sb_pool_skb(card, handle); 1344 recycle_rx_skb(card, queue); 1345 1346 if (next) { 1347 card->raw_cell_head = next; 1348 queue = card->raw_cell_head; 1349 dma_sync_single_for_cpu(&card->pcidev->dev, 1350 IDT77252_PRV_PADDR(queue), 1351 (skb_end_pointer(queue) - 1352 queue->data), 1353 DMA_FROM_DEVICE); 1354 } else { 1355 card->raw_cell_head = NULL; 1356 printk("%s: raw cell queue overrun\n", 1357 card->name); 1358 break; 1359 } 1360 } 1361 } 1362 } 1363 1364 1365 /*****************************************************************************/ 1366 /* */ 1367 /* TSQ Handling */ 1368 /* */ 1369 /*****************************************************************************/ 1370 1371 static int 1372 init_tsq(struct idt77252_dev *card) 1373 { 1374 struct tsq_entry *tsqe; 1375 1376 card->tsq.base = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE, 1377 &card->tsq.paddr, GFP_KERNEL); 1378 if (card->tsq.base == NULL) { 1379 printk("%s: can't allocate TSQ.\n", card->name); 1380 return -1; 1381 } 1382 memset(card->tsq.base, 0, TSQSIZE); 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(unsigned long data) 1532 { 1533 struct idt77252_dev *card = (struct idt77252_dev *)data; 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_level(struct idt77252_dev *card, int queue) 1788 { 1789 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f; 1790 } 1791 1792 static __inline__ int 1793 idt77252_fbq_full(struct idt77252_dev *card, int queue) 1794 { 1795 return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f; 1796 } 1797 1798 static int 1799 push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue) 1800 { 1801 unsigned long flags; 1802 u32 handle; 1803 u32 addr; 1804 1805 skb->data = skb->head; 1806 skb_reset_tail_pointer(skb); 1807 skb->len = 0; 1808 1809 skb_reserve(skb, 16); 1810 1811 switch (queue) { 1812 case 0: 1813 skb_put(skb, SAR_FB_SIZE_0); 1814 break; 1815 case 1: 1816 skb_put(skb, SAR_FB_SIZE_1); 1817 break; 1818 case 2: 1819 skb_put(skb, SAR_FB_SIZE_2); 1820 break; 1821 case 3: 1822 skb_put(skb, SAR_FB_SIZE_3); 1823 break; 1824 default: 1825 return -1; 1826 } 1827 1828 if (idt77252_fbq_full(card, queue)) 1829 return -1; 1830 1831 memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32)); 1832 1833 handle = IDT77252_PRV_POOL(skb); 1834 addr = IDT77252_PRV_PADDR(skb); 1835 1836 spin_lock_irqsave(&card->cmd_lock, flags); 1837 writel(handle, card->fbq[queue]); 1838 writel(addr, card->fbq[queue]); 1839 spin_unlock_irqrestore(&card->cmd_lock, flags); 1840 1841 return 0; 1842 } 1843 1844 static void 1845 add_rx_skb(struct idt77252_dev *card, int queue, 1846 unsigned int size, unsigned int count) 1847 { 1848 struct sk_buff *skb; 1849 dma_addr_t paddr; 1850 u32 handle; 1851 1852 while (count--) { 1853 skb = dev_alloc_skb(size); 1854 if (!skb) 1855 return; 1856 1857 if (sb_pool_add(card, skb, queue)) { 1858 printk("%s: SB POOL full\n", __func__); 1859 goto outfree; 1860 } 1861 1862 paddr = dma_map_single(&card->pcidev->dev, skb->data, 1863 skb_end_pointer(skb) - skb->data, 1864 DMA_FROM_DEVICE); 1865 IDT77252_PRV_PADDR(skb) = paddr; 1866 1867 if (push_rx_skb(card, skb, queue)) { 1868 printk("%s: FB QUEUE full\n", __func__); 1869 goto outunmap; 1870 } 1871 } 1872 1873 return; 1874 1875 outunmap: 1876 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1877 skb_end_pointer(skb) - skb->data, DMA_FROM_DEVICE); 1878 1879 handle = IDT77252_PRV_POOL(skb); 1880 card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL; 1881 1882 outfree: 1883 dev_kfree_skb(skb); 1884 } 1885 1886 1887 static void 1888 recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb) 1889 { 1890 u32 handle = IDT77252_PRV_POOL(skb); 1891 int err; 1892 1893 dma_sync_single_for_device(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1894 skb_end_pointer(skb) - skb->data, 1895 DMA_FROM_DEVICE); 1896 1897 err = push_rx_skb(card, skb, POOL_QUEUE(handle)); 1898 if (err) { 1899 dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), 1900 skb_end_pointer(skb) - skb->data, 1901 DMA_FROM_DEVICE); 1902 sb_pool_remove(card, skb); 1903 dev_kfree_skb(skb); 1904 } 1905 } 1906 1907 static void 1908 flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp) 1909 { 1910 skb_queue_head_init(&rpp->queue); 1911 rpp->len = 0; 1912 } 1913 1914 static void 1915 recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp) 1916 { 1917 struct sk_buff *skb, *tmp; 1918 1919 skb_queue_walk_safe(&rpp->queue, skb, tmp) 1920 recycle_rx_skb(card, skb); 1921 1922 flush_rx_pool(card, rpp); 1923 } 1924 1925 /*****************************************************************************/ 1926 /* */ 1927 /* ATM Interface */ 1928 /* */ 1929 /*****************************************************************************/ 1930 1931 static void 1932 idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr) 1933 { 1934 write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value); 1935 } 1936 1937 static unsigned char 1938 idt77252_phy_get(struct atm_dev *dev, unsigned long addr) 1939 { 1940 return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff)); 1941 } 1942 1943 static inline int 1944 idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam) 1945 { 1946 struct atm_dev *dev = vcc->dev; 1947 struct idt77252_dev *card = dev->dev_data; 1948 struct vc_map *vc = vcc->dev_data; 1949 int err; 1950 1951 if (vc == NULL) { 1952 printk("%s: NULL connection in send().\n", card->name); 1953 atomic_inc(&vcc->stats->tx_err); 1954 dev_kfree_skb(skb); 1955 return -EINVAL; 1956 } 1957 if (!test_bit(VCF_TX, &vc->flags)) { 1958 printk("%s: Trying to transmit on a non-tx VC.\n", card->name); 1959 atomic_inc(&vcc->stats->tx_err); 1960 dev_kfree_skb(skb); 1961 return -EINVAL; 1962 } 1963 1964 switch (vcc->qos.aal) { 1965 case ATM_AAL0: 1966 case ATM_AAL1: 1967 case ATM_AAL5: 1968 break; 1969 default: 1970 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal); 1971 atomic_inc(&vcc->stats->tx_err); 1972 dev_kfree_skb(skb); 1973 return -EINVAL; 1974 } 1975 1976 if (skb_shinfo(skb)->nr_frags != 0) { 1977 printk("%s: No scatter-gather yet.\n", card->name); 1978 atomic_inc(&vcc->stats->tx_err); 1979 dev_kfree_skb(skb); 1980 return -EINVAL; 1981 } 1982 ATM_SKB(skb)->vcc = vcc; 1983 1984 err = queue_skb(card, vc, skb, oam); 1985 if (err) { 1986 atomic_inc(&vcc->stats->tx_err); 1987 dev_kfree_skb(skb); 1988 return err; 1989 } 1990 1991 return 0; 1992 } 1993 1994 static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb) 1995 { 1996 return idt77252_send_skb(vcc, skb, 0); 1997 } 1998 1999 static int 2000 idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags) 2001 { 2002 struct atm_dev *dev = vcc->dev; 2003 struct idt77252_dev *card = dev->dev_data; 2004 struct sk_buff *skb; 2005 2006 skb = dev_alloc_skb(64); 2007 if (!skb) { 2008 printk("%s: Out of memory in send_oam().\n", card->name); 2009 atomic_inc(&vcc->stats->tx_err); 2010 return -ENOMEM; 2011 } 2012 refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); 2013 2014 skb_put_data(skb, cell, 52); 2015 2016 return idt77252_send_skb(vcc, skb, 1); 2017 } 2018 2019 static __inline__ unsigned int 2020 idt77252_fls(unsigned int x) 2021 { 2022 int r = 1; 2023 2024 if (x == 0) 2025 return 0; 2026 if (x & 0xffff0000) { 2027 x >>= 16; 2028 r += 16; 2029 } 2030 if (x & 0xff00) { 2031 x >>= 8; 2032 r += 8; 2033 } 2034 if (x & 0xf0) { 2035 x >>= 4; 2036 r += 4; 2037 } 2038 if (x & 0xc) { 2039 x >>= 2; 2040 r += 2; 2041 } 2042 if (x & 0x2) 2043 r += 1; 2044 return r; 2045 } 2046 2047 static u16 2048 idt77252_int_to_atmfp(unsigned int rate) 2049 { 2050 u16 m, e; 2051 2052 if (rate == 0) 2053 return 0; 2054 e = idt77252_fls(rate) - 1; 2055 if (e < 9) 2056 m = (rate - (1 << e)) << (9 - e); 2057 else if (e == 9) 2058 m = (rate - (1 << e)); 2059 else /* e > 9 */ 2060 m = (rate - (1 << e)) >> (e - 9); 2061 return 0x4000 | (e << 9) | m; 2062 } 2063 2064 static u8 2065 idt77252_rate_logindex(struct idt77252_dev *card, int pcr) 2066 { 2067 u16 afp; 2068 2069 afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr); 2070 if (pcr < 0) 2071 return rate_to_log[(afp >> 5) & 0x1ff]; 2072 return rate_to_log[((afp >> 5) + 1) & 0x1ff]; 2073 } 2074 2075 static void 2076 idt77252_est_timer(unsigned long data) 2077 { 2078 struct vc_map *vc = (struct vc_map *)data; 2079 struct idt77252_dev *card = vc->card; 2080 struct rate_estimator *est; 2081 unsigned long flags; 2082 u32 rate, cps; 2083 u64 ncells; 2084 u8 lacr; 2085 2086 spin_lock_irqsave(&vc->lock, flags); 2087 est = vc->estimator; 2088 if (!est) 2089 goto out; 2090 2091 ncells = est->cells; 2092 2093 rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval); 2094 est->last_cells = ncells; 2095 est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log; 2096 est->cps = (est->avcps + 0x1f) >> 5; 2097 2098 cps = est->cps; 2099 if (cps < (est->maxcps >> 4)) 2100 cps = est->maxcps >> 4; 2101 2102 lacr = idt77252_rate_logindex(card, cps); 2103 if (lacr > vc->max_er) 2104 lacr = vc->max_er; 2105 2106 if (lacr != vc->lacr) { 2107 vc->lacr = lacr; 2108 writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ); 2109 } 2110 2111 est->timer.expires = jiffies + ((HZ / 4) << est->interval); 2112 add_timer(&est->timer); 2113 2114 out: 2115 spin_unlock_irqrestore(&vc->lock, flags); 2116 } 2117 2118 static struct rate_estimator * 2119 idt77252_init_est(struct vc_map *vc, int pcr) 2120 { 2121 struct rate_estimator *est; 2122 2123 est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL); 2124 if (!est) 2125 return NULL; 2126 est->maxcps = pcr < 0 ? -pcr : pcr; 2127 est->cps = est->maxcps; 2128 est->avcps = est->cps << 5; 2129 2130 est->interval = 2; /* XXX: make this configurable */ 2131 est->ewma_log = 2; /* XXX: make this configurable */ 2132 setup_timer(&est->timer, idt77252_est_timer, (unsigned long)vc); 2133 mod_timer(&est->timer, jiffies + ((HZ / 4) << est->interval)); 2134 2135 return est; 2136 } 2137 2138 static int 2139 idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc, 2140 struct atm_vcc *vcc, struct atm_qos *qos) 2141 { 2142 int tst_free, tst_used, tst_entries; 2143 unsigned long tmpl, modl; 2144 int tcr, tcra; 2145 2146 if ((qos->txtp.max_pcr == 0) && 2147 (qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) { 2148 printk("%s: trying to open a CBR VC with cell rate = 0\n", 2149 card->name); 2150 return -EINVAL; 2151 } 2152 2153 tst_used = 0; 2154 tst_free = card->tst_free; 2155 if (test_bit(VCF_TX, &vc->flags)) 2156 tst_used = vc->ntste; 2157 tst_free += tst_used; 2158 2159 tcr = atm_pcr_goal(&qos->txtp); 2160 tcra = tcr >= 0 ? tcr : -tcr; 2161 2162 TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra); 2163 2164 tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2); 2165 modl = tmpl % (unsigned long)card->utopia_pcr; 2166 2167 tst_entries = (int) (tmpl / card->utopia_pcr); 2168 if (tcr > 0) { 2169 if (modl > 0) 2170 tst_entries++; 2171 } else if (tcr == 0) { 2172 tst_entries = tst_free - SAR_TST_RESERVED; 2173 if (tst_entries <= 0) { 2174 printk("%s: no CBR bandwidth free.\n", card->name); 2175 return -ENOSR; 2176 } 2177 } 2178 2179 if (tst_entries == 0) { 2180 printk("%s: selected CBR bandwidth < granularity.\n", 2181 card->name); 2182 return -EINVAL; 2183 } 2184 2185 if (tst_entries > (tst_free - SAR_TST_RESERVED)) { 2186 printk("%s: not enough CBR bandwidth free.\n", card->name); 2187 return -ENOSR; 2188 } 2189 2190 vc->ntste = tst_entries; 2191 2192 card->tst_free = tst_free - tst_entries; 2193 if (test_bit(VCF_TX, &vc->flags)) { 2194 if (tst_used == tst_entries) 2195 return 0; 2196 2197 OPRINTK("%s: modify %d -> %d entries in TST.\n", 2198 card->name, tst_used, tst_entries); 2199 change_tst(card, vc, tst_entries, TSTE_OPC_CBR); 2200 return 0; 2201 } 2202 2203 OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries); 2204 fill_tst(card, vc, tst_entries, TSTE_OPC_CBR); 2205 return 0; 2206 } 2207 2208 static int 2209 idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc, 2210 struct atm_vcc *vcc, struct atm_qos *qos) 2211 { 2212 unsigned long flags; 2213 int tcr; 2214 2215 spin_lock_irqsave(&vc->lock, flags); 2216 if (vc->estimator) { 2217 del_timer(&vc->estimator->timer); 2218 kfree(vc->estimator); 2219 vc->estimator = NULL; 2220 } 2221 spin_unlock_irqrestore(&vc->lock, flags); 2222 2223 tcr = atm_pcr_goal(&qos->txtp); 2224 if (tcr == 0) 2225 tcr = card->link_pcr; 2226 2227 vc->estimator = idt77252_init_est(vc, tcr); 2228 2229 vc->class = SCHED_UBR; 2230 vc->init_er = idt77252_rate_logindex(card, tcr); 2231 vc->lacr = vc->init_er; 2232 if (tcr < 0) 2233 vc->max_er = vc->init_er; 2234 else 2235 vc->max_er = 0xff; 2236 2237 return 0; 2238 } 2239 2240 static int 2241 idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc, 2242 struct atm_vcc *vcc, struct atm_qos *qos) 2243 { 2244 int error; 2245 2246 if (test_bit(VCF_TX, &vc->flags)) 2247 return -EBUSY; 2248 2249 switch (qos->txtp.traffic_class) { 2250 case ATM_CBR: 2251 vc->class = SCHED_CBR; 2252 break; 2253 2254 case ATM_UBR: 2255 vc->class = SCHED_UBR; 2256 break; 2257 2258 case ATM_VBR: 2259 case ATM_ABR: 2260 default: 2261 return -EPROTONOSUPPORT; 2262 } 2263 2264 vc->scq = alloc_scq(card, vc->class); 2265 if (!vc->scq) { 2266 printk("%s: can't get SCQ.\n", card->name); 2267 return -ENOMEM; 2268 } 2269 2270 vc->scq->scd = get_free_scd(card, vc); 2271 if (vc->scq->scd == 0) { 2272 printk("%s: no SCD available.\n", card->name); 2273 free_scq(card, vc->scq); 2274 return -ENOMEM; 2275 } 2276 2277 fill_scd(card, vc->scq, vc->class); 2278 2279 if (set_tct(card, vc)) { 2280 printk("%s: class %d not supported.\n", 2281 card->name, qos->txtp.traffic_class); 2282 2283 card->scd2vc[vc->scd_index] = NULL; 2284 free_scq(card, vc->scq); 2285 return -EPROTONOSUPPORT; 2286 } 2287 2288 switch (vc->class) { 2289 case SCHED_CBR: 2290 error = idt77252_init_cbr(card, vc, vcc, qos); 2291 if (error) { 2292 card->scd2vc[vc->scd_index] = NULL; 2293 free_scq(card, vc->scq); 2294 return error; 2295 } 2296 2297 clear_bit(VCF_IDLE, &vc->flags); 2298 writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ); 2299 break; 2300 2301 case SCHED_UBR: 2302 error = idt77252_init_ubr(card, vc, vcc, qos); 2303 if (error) { 2304 card->scd2vc[vc->scd_index] = NULL; 2305 free_scq(card, vc->scq); 2306 return error; 2307 } 2308 2309 set_bit(VCF_IDLE, &vc->flags); 2310 break; 2311 } 2312 2313 vc->tx_vcc = vcc; 2314 set_bit(VCF_TX, &vc->flags); 2315 return 0; 2316 } 2317 2318 static int 2319 idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc, 2320 struct atm_vcc *vcc, struct atm_qos *qos) 2321 { 2322 unsigned long flags; 2323 unsigned long addr; 2324 u32 rcte = 0; 2325 2326 if (test_bit(VCF_RX, &vc->flags)) 2327 return -EBUSY; 2328 2329 vc->rx_vcc = vcc; 2330 set_bit(VCF_RX, &vc->flags); 2331 2332 if ((vcc->vci == 3) || (vcc->vci == 4)) 2333 return 0; 2334 2335 flush_rx_pool(card, &vc->rcv.rx_pool); 2336 2337 rcte |= SAR_RCTE_CONNECTOPEN; 2338 rcte |= SAR_RCTE_RAWCELLINTEN; 2339 2340 switch (qos->aal) { 2341 case ATM_AAL0: 2342 rcte |= SAR_RCTE_RCQ; 2343 break; 2344 case ATM_AAL1: 2345 rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */ 2346 break; 2347 case ATM_AAL34: 2348 rcte |= SAR_RCTE_AAL34; 2349 break; 2350 case ATM_AAL5: 2351 rcte |= SAR_RCTE_AAL5; 2352 break; 2353 default: 2354 rcte |= SAR_RCTE_RCQ; 2355 break; 2356 } 2357 2358 if (qos->aal != ATM_AAL5) 2359 rcte |= SAR_RCTE_FBP_1; 2360 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2) 2361 rcte |= SAR_RCTE_FBP_3; 2362 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1) 2363 rcte |= SAR_RCTE_FBP_2; 2364 else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0) 2365 rcte |= SAR_RCTE_FBP_1; 2366 else 2367 rcte |= SAR_RCTE_FBP_01; 2368 2369 addr = card->rct_base + (vc->index << 2); 2370 2371 OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr); 2372 write_sram(card, addr, rcte); 2373 2374 spin_lock_irqsave(&card->cmd_lock, flags); 2375 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD); 2376 waitfor_idle(card); 2377 spin_unlock_irqrestore(&card->cmd_lock, flags); 2378 2379 return 0; 2380 } 2381 2382 static int 2383 idt77252_open(struct atm_vcc *vcc) 2384 { 2385 struct atm_dev *dev = vcc->dev; 2386 struct idt77252_dev *card = dev->dev_data; 2387 struct vc_map *vc; 2388 unsigned int index; 2389 unsigned int inuse; 2390 int error; 2391 int vci = vcc->vci; 2392 short vpi = vcc->vpi; 2393 2394 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) 2395 return 0; 2396 2397 if (vpi >= (1 << card->vpibits)) { 2398 printk("%s: unsupported VPI: %d\n", card->name, vpi); 2399 return -EINVAL; 2400 } 2401 2402 if (vci >= (1 << card->vcibits)) { 2403 printk("%s: unsupported VCI: %d\n", card->name, vci); 2404 return -EINVAL; 2405 } 2406 2407 set_bit(ATM_VF_ADDR, &vcc->flags); 2408 2409 mutex_lock(&card->mutex); 2410 2411 OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci); 2412 2413 switch (vcc->qos.aal) { 2414 case ATM_AAL0: 2415 case ATM_AAL1: 2416 case ATM_AAL5: 2417 break; 2418 default: 2419 printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal); 2420 mutex_unlock(&card->mutex); 2421 return -EPROTONOSUPPORT; 2422 } 2423 2424 index = VPCI2VC(card, vpi, vci); 2425 if (!card->vcs[index]) { 2426 card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2427 if (!card->vcs[index]) { 2428 printk("%s: can't alloc vc in open()\n", card->name); 2429 mutex_unlock(&card->mutex); 2430 return -ENOMEM; 2431 } 2432 card->vcs[index]->card = card; 2433 card->vcs[index]->index = index; 2434 2435 spin_lock_init(&card->vcs[index]->lock); 2436 } 2437 vc = card->vcs[index]; 2438 2439 vcc->dev_data = vc; 2440 2441 IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n", 2442 card->name, vc->index, vcc->vpi, vcc->vci, 2443 vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--", 2444 vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--", 2445 vcc->qos.rxtp.max_sdu); 2446 2447 inuse = 0; 2448 if (vcc->qos.txtp.traffic_class != ATM_NONE && 2449 test_bit(VCF_TX, &vc->flags)) 2450 inuse = 1; 2451 if (vcc->qos.rxtp.traffic_class != ATM_NONE && 2452 test_bit(VCF_RX, &vc->flags)) 2453 inuse += 2; 2454 2455 if (inuse) { 2456 printk("%s: %s vci already in use.\n", card->name, 2457 inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx"); 2458 mutex_unlock(&card->mutex); 2459 return -EADDRINUSE; 2460 } 2461 2462 if (vcc->qos.txtp.traffic_class != ATM_NONE) { 2463 error = idt77252_init_tx(card, vc, vcc, &vcc->qos); 2464 if (error) { 2465 mutex_unlock(&card->mutex); 2466 return error; 2467 } 2468 } 2469 2470 if (vcc->qos.rxtp.traffic_class != ATM_NONE) { 2471 error = idt77252_init_rx(card, vc, vcc, &vcc->qos); 2472 if (error) { 2473 mutex_unlock(&card->mutex); 2474 return error; 2475 } 2476 } 2477 2478 set_bit(ATM_VF_READY, &vcc->flags); 2479 2480 mutex_unlock(&card->mutex); 2481 return 0; 2482 } 2483 2484 static void 2485 idt77252_close(struct atm_vcc *vcc) 2486 { 2487 struct atm_dev *dev = vcc->dev; 2488 struct idt77252_dev *card = dev->dev_data; 2489 struct vc_map *vc = vcc->dev_data; 2490 unsigned long flags; 2491 unsigned long addr; 2492 unsigned long timeout; 2493 2494 mutex_lock(&card->mutex); 2495 2496 IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n", 2497 card->name, vc->index, vcc->vpi, vcc->vci); 2498 2499 clear_bit(ATM_VF_READY, &vcc->flags); 2500 2501 if (vcc->qos.rxtp.traffic_class != ATM_NONE) { 2502 2503 spin_lock_irqsave(&vc->lock, flags); 2504 clear_bit(VCF_RX, &vc->flags); 2505 vc->rx_vcc = NULL; 2506 spin_unlock_irqrestore(&vc->lock, flags); 2507 2508 if ((vcc->vci == 3) || (vcc->vci == 4)) 2509 goto done; 2510 2511 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE; 2512 2513 spin_lock_irqsave(&card->cmd_lock, flags); 2514 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD); 2515 waitfor_idle(card); 2516 spin_unlock_irqrestore(&card->cmd_lock, flags); 2517 2518 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) { 2519 DPRINTK("%s: closing a VC with pending rx buffers.\n", 2520 card->name); 2521 2522 recycle_rx_pool_skb(card, &vc->rcv.rx_pool); 2523 } 2524 } 2525 2526 done: 2527 if (vcc->qos.txtp.traffic_class != ATM_NONE) { 2528 2529 spin_lock_irqsave(&vc->lock, flags); 2530 clear_bit(VCF_TX, &vc->flags); 2531 clear_bit(VCF_IDLE, &vc->flags); 2532 clear_bit(VCF_RSV, &vc->flags); 2533 vc->tx_vcc = NULL; 2534 2535 if (vc->estimator) { 2536 del_timer(&vc->estimator->timer); 2537 kfree(vc->estimator); 2538 vc->estimator = NULL; 2539 } 2540 spin_unlock_irqrestore(&vc->lock, flags); 2541 2542 timeout = 5 * 1000; 2543 while (atomic_read(&vc->scq->used) > 0) { 2544 timeout = msleep_interruptible(timeout); 2545 if (!timeout) { 2546 pr_warn("%s: SCQ drain timeout: %u used\n", 2547 card->name, atomic_read(&vc->scq->used)); 2548 break; 2549 } 2550 } 2551 2552 writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ); 2553 clear_scd(card, vc->scq, vc->class); 2554 2555 if (vc->class == SCHED_CBR) { 2556 clear_tst(card, vc); 2557 card->tst_free += vc->ntste; 2558 vc->ntste = 0; 2559 } 2560 2561 card->scd2vc[vc->scd_index] = NULL; 2562 free_scq(card, vc->scq); 2563 } 2564 2565 mutex_unlock(&card->mutex); 2566 } 2567 2568 static int 2569 idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags) 2570 { 2571 struct atm_dev *dev = vcc->dev; 2572 struct idt77252_dev *card = dev->dev_data; 2573 struct vc_map *vc = vcc->dev_data; 2574 int error = 0; 2575 2576 mutex_lock(&card->mutex); 2577 2578 if (qos->txtp.traffic_class != ATM_NONE) { 2579 if (!test_bit(VCF_TX, &vc->flags)) { 2580 error = idt77252_init_tx(card, vc, vcc, qos); 2581 if (error) 2582 goto out; 2583 } else { 2584 switch (qos->txtp.traffic_class) { 2585 case ATM_CBR: 2586 error = idt77252_init_cbr(card, vc, vcc, qos); 2587 if (error) 2588 goto out; 2589 break; 2590 2591 case ATM_UBR: 2592 error = idt77252_init_ubr(card, vc, vcc, qos); 2593 if (error) 2594 goto out; 2595 2596 if (!test_bit(VCF_IDLE, &vc->flags)) { 2597 writel(TCMDQ_LACR | (vc->lacr << 16) | 2598 vc->index, SAR_REG_TCMDQ); 2599 } 2600 break; 2601 2602 case ATM_VBR: 2603 case ATM_ABR: 2604 error = -EOPNOTSUPP; 2605 goto out; 2606 } 2607 } 2608 } 2609 2610 if ((qos->rxtp.traffic_class != ATM_NONE) && 2611 !test_bit(VCF_RX, &vc->flags)) { 2612 error = idt77252_init_rx(card, vc, vcc, qos); 2613 if (error) 2614 goto out; 2615 } 2616 2617 memcpy(&vcc->qos, qos, sizeof(struct atm_qos)); 2618 2619 set_bit(ATM_VF_HASQOS, &vcc->flags); 2620 2621 out: 2622 mutex_unlock(&card->mutex); 2623 return error; 2624 } 2625 2626 static int 2627 idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page) 2628 { 2629 struct idt77252_dev *card = dev->dev_data; 2630 int i, left; 2631 2632 left = (int) *pos; 2633 if (!left--) 2634 return sprintf(page, "IDT77252 Interrupts:\n"); 2635 if (!left--) 2636 return sprintf(page, "TSIF: %lu\n", card->irqstat[15]); 2637 if (!left--) 2638 return sprintf(page, "TXICP: %lu\n", card->irqstat[14]); 2639 if (!left--) 2640 return sprintf(page, "TSQF: %lu\n", card->irqstat[12]); 2641 if (!left--) 2642 return sprintf(page, "TMROF: %lu\n", card->irqstat[11]); 2643 if (!left--) 2644 return sprintf(page, "PHYI: %lu\n", card->irqstat[10]); 2645 if (!left--) 2646 return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]); 2647 if (!left--) 2648 return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]); 2649 if (!left--) 2650 return sprintf(page, "RSQF: %lu\n", card->irqstat[6]); 2651 if (!left--) 2652 return sprintf(page, "EPDU: %lu\n", card->irqstat[5]); 2653 if (!left--) 2654 return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]); 2655 if (!left--) 2656 return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]); 2657 if (!left--) 2658 return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]); 2659 if (!left--) 2660 return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]); 2661 if (!left--) 2662 return sprintf(page, "IDT77252 Transmit Connection Table:\n"); 2663 2664 for (i = 0; i < card->tct_size; i++) { 2665 unsigned long tct; 2666 struct atm_vcc *vcc; 2667 struct vc_map *vc; 2668 char *p; 2669 2670 vc = card->vcs[i]; 2671 if (!vc) 2672 continue; 2673 2674 vcc = NULL; 2675 if (vc->tx_vcc) 2676 vcc = vc->tx_vcc; 2677 if (!vcc) 2678 continue; 2679 if (left--) 2680 continue; 2681 2682 p = page; 2683 p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci); 2684 tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE); 2685 2686 for (i = 0; i < 8; i++) 2687 p += sprintf(p, " %08x", read_sram(card, tct + i)); 2688 p += sprintf(p, "\n"); 2689 return p - page; 2690 } 2691 return 0; 2692 } 2693 2694 /*****************************************************************************/ 2695 /* */ 2696 /* Interrupt handler */ 2697 /* */ 2698 /*****************************************************************************/ 2699 2700 static void 2701 idt77252_collect_stat(struct idt77252_dev *card) 2702 { 2703 (void) readl(SAR_REG_CDC); 2704 (void) readl(SAR_REG_VPEC); 2705 (void) readl(SAR_REG_ICC); 2706 2707 } 2708 2709 static irqreturn_t 2710 idt77252_interrupt(int irq, void *dev_id) 2711 { 2712 struct idt77252_dev *card = dev_id; 2713 u32 stat; 2714 2715 stat = readl(SAR_REG_STAT) & 0xffff; 2716 if (!stat) /* no interrupt for us */ 2717 return IRQ_NONE; 2718 2719 if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) { 2720 printk("%s: Re-entering irq_handler()\n", card->name); 2721 goto out; 2722 } 2723 2724 writel(stat, SAR_REG_STAT); /* reset interrupt */ 2725 2726 if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */ 2727 INTPRINTK("%s: TSIF\n", card->name); 2728 card->irqstat[15]++; 2729 idt77252_tx(card); 2730 } 2731 if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */ 2732 INTPRINTK("%s: TXICP\n", card->name); 2733 card->irqstat[14]++; 2734 #ifdef CONFIG_ATM_IDT77252_DEBUG 2735 idt77252_tx_dump(card); 2736 #endif 2737 } 2738 if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */ 2739 INTPRINTK("%s: TSQF\n", card->name); 2740 card->irqstat[12]++; 2741 idt77252_tx(card); 2742 } 2743 if (stat & SAR_STAT_TMROF) { /* Timer overflow */ 2744 INTPRINTK("%s: TMROF\n", card->name); 2745 card->irqstat[11]++; 2746 idt77252_collect_stat(card); 2747 } 2748 2749 if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */ 2750 INTPRINTK("%s: EPDU\n", card->name); 2751 card->irqstat[5]++; 2752 idt77252_rx(card); 2753 } 2754 if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */ 2755 INTPRINTK("%s: RSQAF\n", card->name); 2756 card->irqstat[1]++; 2757 idt77252_rx(card); 2758 } 2759 if (stat & SAR_STAT_RSQF) { /* RSQ is full */ 2760 INTPRINTK("%s: RSQF\n", card->name); 2761 card->irqstat[6]++; 2762 idt77252_rx(card); 2763 } 2764 if (stat & SAR_STAT_RAWCF) { /* Raw cell received */ 2765 INTPRINTK("%s: RAWCF\n", card->name); 2766 card->irqstat[4]++; 2767 idt77252_rx_raw(card); 2768 } 2769 2770 if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */ 2771 INTPRINTK("%s: PHYI", card->name); 2772 card->irqstat[10]++; 2773 if (card->atmdev->phy && card->atmdev->phy->interrupt) 2774 card->atmdev->phy->interrupt(card->atmdev); 2775 } 2776 2777 if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A | 2778 SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) { 2779 2780 writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG); 2781 2782 INTPRINTK("%s: FBQA: %04x\n", card->name, stat); 2783 2784 if (stat & SAR_STAT_FBQ0A) 2785 card->irqstat[2]++; 2786 if (stat & SAR_STAT_FBQ1A) 2787 card->irqstat[3]++; 2788 if (stat & SAR_STAT_FBQ2A) 2789 card->irqstat[7]++; 2790 if (stat & SAR_STAT_FBQ3A) 2791 card->irqstat[8]++; 2792 2793 schedule_work(&card->tqueue); 2794 } 2795 2796 out: 2797 clear_bit(IDT77252_BIT_INTERRUPT, &card->flags); 2798 return IRQ_HANDLED; 2799 } 2800 2801 static void 2802 idt77252_softint(struct work_struct *work) 2803 { 2804 struct idt77252_dev *card = 2805 container_of(work, struct idt77252_dev, tqueue); 2806 u32 stat; 2807 int done; 2808 2809 for (done = 1; ; done = 1) { 2810 stat = readl(SAR_REG_STAT) >> 16; 2811 2812 if ((stat & 0x0f) < SAR_FBQ0_HIGH) { 2813 add_rx_skb(card, 0, SAR_FB_SIZE_0, 32); 2814 done = 0; 2815 } 2816 2817 stat >>= 4; 2818 if ((stat & 0x0f) < SAR_FBQ1_HIGH) { 2819 add_rx_skb(card, 1, SAR_FB_SIZE_1, 32); 2820 done = 0; 2821 } 2822 2823 stat >>= 4; 2824 if ((stat & 0x0f) < SAR_FBQ2_HIGH) { 2825 add_rx_skb(card, 2, SAR_FB_SIZE_2, 32); 2826 done = 0; 2827 } 2828 2829 stat >>= 4; 2830 if ((stat & 0x0f) < SAR_FBQ3_HIGH) { 2831 add_rx_skb(card, 3, SAR_FB_SIZE_3, 32); 2832 done = 0; 2833 } 2834 2835 if (done) 2836 break; 2837 } 2838 2839 writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG); 2840 } 2841 2842 2843 static int 2844 open_card_oam(struct idt77252_dev *card) 2845 { 2846 unsigned long flags; 2847 unsigned long addr; 2848 struct vc_map *vc; 2849 int vpi, vci; 2850 int index; 2851 u32 rcte; 2852 2853 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) { 2854 for (vci = 3; vci < 5; vci++) { 2855 index = VPCI2VC(card, vpi, vci); 2856 2857 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2858 if (!vc) { 2859 printk("%s: can't alloc vc\n", card->name); 2860 return -ENOMEM; 2861 } 2862 vc->index = index; 2863 card->vcs[index] = vc; 2864 2865 flush_rx_pool(card, &vc->rcv.rx_pool); 2866 2867 rcte = SAR_RCTE_CONNECTOPEN | 2868 SAR_RCTE_RAWCELLINTEN | 2869 SAR_RCTE_RCQ | 2870 SAR_RCTE_FBP_1; 2871 2872 addr = card->rct_base + (vc->index << 2); 2873 write_sram(card, addr, rcte); 2874 2875 spin_lock_irqsave(&card->cmd_lock, flags); 2876 writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), 2877 SAR_REG_CMD); 2878 waitfor_idle(card); 2879 spin_unlock_irqrestore(&card->cmd_lock, flags); 2880 } 2881 } 2882 2883 return 0; 2884 } 2885 2886 static void 2887 close_card_oam(struct idt77252_dev *card) 2888 { 2889 unsigned long flags; 2890 unsigned long addr; 2891 struct vc_map *vc; 2892 int vpi, vci; 2893 int index; 2894 2895 for (vpi = 0; vpi < (1 << card->vpibits); vpi++) { 2896 for (vci = 3; vci < 5; vci++) { 2897 index = VPCI2VC(card, vpi, vci); 2898 vc = card->vcs[index]; 2899 2900 addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE; 2901 2902 spin_lock_irqsave(&card->cmd_lock, flags); 2903 writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), 2904 SAR_REG_CMD); 2905 waitfor_idle(card); 2906 spin_unlock_irqrestore(&card->cmd_lock, flags); 2907 2908 if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) { 2909 DPRINTK("%s: closing a VC " 2910 "with pending rx buffers.\n", 2911 card->name); 2912 2913 recycle_rx_pool_skb(card, &vc->rcv.rx_pool); 2914 } 2915 } 2916 } 2917 } 2918 2919 static int 2920 open_card_ubr0(struct idt77252_dev *card) 2921 { 2922 struct vc_map *vc; 2923 2924 vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL); 2925 if (!vc) { 2926 printk("%s: can't alloc vc\n", card->name); 2927 return -ENOMEM; 2928 } 2929 card->vcs[0] = vc; 2930 vc->class = SCHED_UBR0; 2931 2932 vc->scq = alloc_scq(card, vc->class); 2933 if (!vc->scq) { 2934 printk("%s: can't get SCQ.\n", card->name); 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 int 2959 idt77252_dev_open(struct idt77252_dev *card) 2960 { 2961 u32 conf; 2962 2963 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) { 2964 printk("%s: SAR not yet initialized.\n", card->name); 2965 return -1; 2966 } 2967 2968 conf = SAR_CFG_RXPTH| /* enable receive path */ 2969 SAR_RX_DELAY | /* interrupt on complete PDU */ 2970 SAR_CFG_RAWIE | /* interrupt enable on raw cells */ 2971 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */ 2972 SAR_CFG_TMOIE | /* interrupt on timer overflow */ 2973 SAR_CFG_FBIE | /* interrupt on low free buffers */ 2974 SAR_CFG_TXEN | /* transmit operation enable */ 2975 SAR_CFG_TXINT | /* interrupt on transmit status */ 2976 SAR_CFG_TXUIE | /* interrupt on transmit underrun */ 2977 SAR_CFG_TXSFI | /* interrupt on TSQ almost full */ 2978 SAR_CFG_PHYIE /* enable PHY interrupts */ 2979 ; 2980 2981 #ifdef CONFIG_ATM_IDT77252_RCV_ALL 2982 /* Test RAW cell receive. */ 2983 conf |= SAR_CFG_VPECA; 2984 #endif 2985 2986 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG); 2987 2988 if (open_card_oam(card)) { 2989 printk("%s: Error initializing OAM.\n", card->name); 2990 return -1; 2991 } 2992 2993 if (open_card_ubr0(card)) { 2994 printk("%s: Error initializing UBR0.\n", card->name); 2995 return -1; 2996 } 2997 2998 IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name); 2999 return 0; 3000 } 3001 3002 static void idt77252_dev_close(struct atm_dev *dev) 3003 { 3004 struct idt77252_dev *card = dev->dev_data; 3005 u32 conf; 3006 3007 close_card_oam(card); 3008 3009 conf = SAR_CFG_RXPTH | /* enable receive path */ 3010 SAR_RX_DELAY | /* interrupt on complete PDU */ 3011 SAR_CFG_RAWIE | /* interrupt enable on raw cells */ 3012 SAR_CFG_RQFIE | /* interrupt on RSQ almost full */ 3013 SAR_CFG_TMOIE | /* interrupt on timer overflow */ 3014 SAR_CFG_FBIE | /* interrupt on low free buffers */ 3015 SAR_CFG_TXEN | /* transmit operation enable */ 3016 SAR_CFG_TXINT | /* interrupt on transmit status */ 3017 SAR_CFG_TXUIE | /* interrupt on xmit underrun */ 3018 SAR_CFG_TXSFI /* interrupt on TSQ almost full */ 3019 ; 3020 3021 writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG); 3022 3023 DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name); 3024 } 3025 3026 3027 /*****************************************************************************/ 3028 /* */ 3029 /* Initialisation and Deinitialization of IDT77252 */ 3030 /* */ 3031 /*****************************************************************************/ 3032 3033 3034 static void 3035 deinit_card(struct idt77252_dev *card) 3036 { 3037 struct sk_buff *skb; 3038 int i, j; 3039 3040 if (!test_bit(IDT77252_BIT_INIT, &card->flags)) { 3041 printk("%s: SAR not yet initialized.\n", card->name); 3042 return; 3043 } 3044 DIPRINTK("idt77252: deinitialize card %u\n", card->index); 3045 3046 writel(0, SAR_REG_CFG); 3047 3048 if (card->atmdev) 3049 atm_dev_deregister(card->atmdev); 3050 3051 for (i = 0; i < 4; i++) { 3052 for (j = 0; j < FBQ_SIZE; j++) { 3053 skb = card->sbpool[i].skb[j]; 3054 if (skb) { 3055 dma_unmap_single(&card->pcidev->dev, 3056 IDT77252_PRV_PADDR(skb), 3057 (skb_end_pointer(skb) - 3058 skb->data), 3059 DMA_FROM_DEVICE); 3060 card->sbpool[i].skb[j] = NULL; 3061 dev_kfree_skb(skb); 3062 } 3063 } 3064 } 3065 3066 vfree(card->soft_tst); 3067 3068 vfree(card->scd2vc); 3069 3070 vfree(card->vcs); 3071 3072 if (card->raw_cell_hnd) { 3073 dma_free_coherent(&card->pcidev->dev, 2 * sizeof(u32), 3074 card->raw_cell_hnd, card->raw_cell_paddr); 3075 } 3076 3077 if (card->rsq.base) { 3078 DIPRINTK("%s: Release RSQ ...\n", card->name); 3079 deinit_rsq(card); 3080 } 3081 3082 if (card->tsq.base) { 3083 DIPRINTK("%s: Release TSQ ...\n", card->name); 3084 deinit_tsq(card); 3085 } 3086 3087 DIPRINTK("idt77252: Release IRQ.\n"); 3088 free_irq(card->pcidev->irq, card); 3089 3090 for (i = 0; i < 4; i++) { 3091 if (card->fbq[i]) 3092 iounmap(card->fbq[i]); 3093 } 3094 3095 if (card->membase) 3096 iounmap(card->membase); 3097 3098 clear_bit(IDT77252_BIT_INIT, &card->flags); 3099 DIPRINTK("%s: Card deinitialized.\n", card->name); 3100 } 3101 3102 3103 static void init_sram(struct idt77252_dev *card) 3104 { 3105 int i; 3106 3107 for (i = 0; i < card->sramsize; i += 4) 3108 write_sram(card, (i >> 2), 0); 3109 3110 /* set SRAM layout for THIS card */ 3111 if (card->sramsize == (512 * 1024)) { 3112 card->tct_base = SAR_SRAM_TCT_128_BASE; 3113 card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1) 3114 / SAR_SRAM_TCT_SIZE; 3115 card->rct_base = SAR_SRAM_RCT_128_BASE; 3116 card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1) 3117 / SAR_SRAM_RCT_SIZE; 3118 card->rt_base = SAR_SRAM_RT_128_BASE; 3119 card->scd_base = SAR_SRAM_SCD_128_BASE; 3120 card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1) 3121 / SAR_SRAM_SCD_SIZE; 3122 card->tst[0] = SAR_SRAM_TST1_128_BASE; 3123 card->tst[1] = SAR_SRAM_TST2_128_BASE; 3124 card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1; 3125 card->abrst_base = SAR_SRAM_ABRSTD_128_BASE; 3126 card->abrst_size = SAR_ABRSTD_SIZE_8K; 3127 card->fifo_base = SAR_SRAM_FIFO_128_BASE; 3128 card->fifo_size = SAR_RXFD_SIZE_32K; 3129 } else { 3130 card->tct_base = SAR_SRAM_TCT_32_BASE; 3131 card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1) 3132 / SAR_SRAM_TCT_SIZE; 3133 card->rct_base = SAR_SRAM_RCT_32_BASE; 3134 card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1) 3135 / SAR_SRAM_RCT_SIZE; 3136 card->rt_base = SAR_SRAM_RT_32_BASE; 3137 card->scd_base = SAR_SRAM_SCD_32_BASE; 3138 card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1) 3139 / SAR_SRAM_SCD_SIZE; 3140 card->tst[0] = SAR_SRAM_TST1_32_BASE; 3141 card->tst[1] = SAR_SRAM_TST2_32_BASE; 3142 card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1); 3143 card->abrst_base = SAR_SRAM_ABRSTD_32_BASE; 3144 card->abrst_size = SAR_ABRSTD_SIZE_1K; 3145 card->fifo_base = SAR_SRAM_FIFO_32_BASE; 3146 card->fifo_size = SAR_RXFD_SIZE_4K; 3147 } 3148 3149 /* Initialize TCT */ 3150 for (i = 0; i < card->tct_size; i++) { 3151 write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0); 3152 write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0); 3153 write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0); 3154 write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0); 3155 write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0); 3156 write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0); 3157 write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0); 3158 write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0); 3159 } 3160 3161 /* Initialize RCT */ 3162 for (i = 0; i < card->rct_size; i++) { 3163 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE, 3164 (u32) SAR_RCTE_RAWCELLINTEN); 3165 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1, 3166 (u32) 0); 3167 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2, 3168 (u32) 0); 3169 write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3, 3170 (u32) 0xffffffff); 3171 } 3172 3173 writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 | 3174 (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0); 3175 writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 | 3176 (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1); 3177 writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 | 3178 (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2); 3179 writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 | 3180 (SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3); 3181 3182 /* Initialize rate table */ 3183 for (i = 0; i < 256; i++) { 3184 write_sram(card, card->rt_base + i, log_to_rate[i]); 3185 } 3186 3187 for (i = 0; i < 128; i++) { 3188 unsigned int tmp; 3189 3190 tmp = rate_to_log[(i << 2) + 0] << 0; 3191 tmp |= rate_to_log[(i << 2) + 1] << 8; 3192 tmp |= rate_to_log[(i << 2) + 2] << 16; 3193 tmp |= rate_to_log[(i << 2) + 3] << 24; 3194 write_sram(card, card->rt_base + 256 + i, tmp); 3195 } 3196 3197 #if 0 /* Fill RDF and AIR tables. */ 3198 for (i = 0; i < 128; i++) { 3199 unsigned int tmp; 3200 3201 tmp = RDF[0][(i << 1) + 0] << 16; 3202 tmp |= RDF[0][(i << 1) + 1] << 0; 3203 write_sram(card, card->rt_base + 512 + i, tmp); 3204 } 3205 3206 for (i = 0; i < 128; i++) { 3207 unsigned int tmp; 3208 3209 tmp = AIR[0][(i << 1) + 0] << 16; 3210 tmp |= AIR[0][(i << 1) + 1] << 0; 3211 write_sram(card, card->rt_base + 640 + i, tmp); 3212 } 3213 #endif 3214 3215 IPRINTK("%s: initialize rate table ...\n", card->name); 3216 writel(card->rt_base << 2, SAR_REG_RTBL); 3217 3218 /* Initialize TSTs */ 3219 IPRINTK("%s: initialize TST ...\n", card->name); 3220 card->tst_free = card->tst_size - 2; /* last two are jumps */ 3221 3222 for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++) 3223 write_sram(card, i, TSTE_OPC_VAR); 3224 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2)); 3225 idt77252_sram_write_errors = 1; 3226 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2)); 3227 idt77252_sram_write_errors = 0; 3228 for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++) 3229 write_sram(card, i, TSTE_OPC_VAR); 3230 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2)); 3231 idt77252_sram_write_errors = 1; 3232 write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2)); 3233 idt77252_sram_write_errors = 0; 3234 3235 card->tst_index = 0; 3236 writel(card->tst[0] << 2, SAR_REG_TSTB); 3237 3238 /* Initialize ABRSTD and Receive FIFO */ 3239 IPRINTK("%s: initialize ABRSTD ...\n", card->name); 3240 writel(card->abrst_size | (card->abrst_base << 2), 3241 SAR_REG_ABRSTD); 3242 3243 IPRINTK("%s: initialize receive fifo ...\n", card->name); 3244 writel(card->fifo_size | (card->fifo_base << 2), 3245 SAR_REG_RXFD); 3246 3247 IPRINTK("%s: SRAM initialization complete.\n", card->name); 3248 } 3249 3250 static int init_card(struct atm_dev *dev) 3251 { 3252 struct idt77252_dev *card = dev->dev_data; 3253 struct pci_dev *pcidev = card->pcidev; 3254 unsigned long tmpl, modl; 3255 unsigned int linkrate, rsvdcr; 3256 unsigned int tst_entries; 3257 struct net_device *tmp; 3258 char tname[10]; 3259 3260 u32 size; 3261 u_char pci_byte; 3262 u32 conf; 3263 int i, k; 3264 3265 if (test_bit(IDT77252_BIT_INIT, &card->flags)) { 3266 printk("Error: SAR already initialized.\n"); 3267 return -1; 3268 } 3269 3270 /*****************************************************************/ 3271 /* P C I C O N F I G U R A T I O N */ 3272 /*****************************************************************/ 3273 3274 /* Set PCI Retry-Timeout and TRDY timeout */ 3275 IPRINTK("%s: Checking PCI retries.\n", card->name); 3276 if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) { 3277 printk("%s: can't read PCI retry timeout.\n", card->name); 3278 deinit_card(card); 3279 return -1; 3280 } 3281 if (pci_byte != 0) { 3282 IPRINTK("%s: PCI retry timeout: %d, set to 0.\n", 3283 card->name, pci_byte); 3284 if (pci_write_config_byte(pcidev, 0x40, 0) != 0) { 3285 printk("%s: can't set PCI retry timeout.\n", 3286 card->name); 3287 deinit_card(card); 3288 return -1; 3289 } 3290 } 3291 IPRINTK("%s: Checking PCI TRDY.\n", card->name); 3292 if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) { 3293 printk("%s: can't read PCI TRDY timeout.\n", card->name); 3294 deinit_card(card); 3295 return -1; 3296 } 3297 if (pci_byte != 0) { 3298 IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n", 3299 card->name, pci_byte); 3300 if (pci_write_config_byte(pcidev, 0x41, 0) != 0) { 3301 printk("%s: can't set PCI TRDY timeout.\n", card->name); 3302 deinit_card(card); 3303 return -1; 3304 } 3305 } 3306 /* Reset Timer register */ 3307 if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) { 3308 printk("%s: resetting timer overflow.\n", card->name); 3309 writel(SAR_STAT_TMROF, SAR_REG_STAT); 3310 } 3311 IPRINTK("%s: Request IRQ ... ", card->name); 3312 if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED, 3313 card->name, card) != 0) { 3314 printk("%s: can't allocate IRQ.\n", card->name); 3315 deinit_card(card); 3316 return -1; 3317 } 3318 IPRINTK("got %d.\n", pcidev->irq); 3319 3320 /*****************************************************************/ 3321 /* C H E C K A N D I N I T S R A M */ 3322 /*****************************************************************/ 3323 3324 IPRINTK("%s: Initializing SRAM\n", card->name); 3325 3326 /* preset size of connecton table, so that init_sram() knows about it */ 3327 conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */ 3328 SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */ 3329 SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */ 3330 #ifndef ATM_IDT77252_SEND_IDLE 3331 SAR_CFG_NO_IDLE | /* Do not send idle cells */ 3332 #endif 3333 0; 3334 3335 if (card->sramsize == (512 * 1024)) 3336 conf |= SAR_CFG_CNTBL_1k; 3337 else 3338 conf |= SAR_CFG_CNTBL_512; 3339 3340 switch (vpibits) { 3341 case 0: 3342 conf |= SAR_CFG_VPVCS_0; 3343 break; 3344 default: 3345 case 1: 3346 conf |= SAR_CFG_VPVCS_1; 3347 break; 3348 case 2: 3349 conf |= SAR_CFG_VPVCS_2; 3350 break; 3351 case 8: 3352 conf |= SAR_CFG_VPVCS_8; 3353 break; 3354 } 3355 3356 writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG); 3357 3358 init_sram(card); 3359 3360 /********************************************************************/ 3361 /* 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 */ 3362 /********************************************************************/ 3363 /* Initialize TSQ */ 3364 if (0 != init_tsq(card)) { 3365 deinit_card(card); 3366 return -1; 3367 } 3368 /* Initialize RSQ */ 3369 if (0 != init_rsq(card)) { 3370 deinit_card(card); 3371 return -1; 3372 } 3373 3374 card->vpibits = vpibits; 3375 if (card->sramsize == (512 * 1024)) { 3376 card->vcibits = 10 - card->vpibits; 3377 } else { 3378 card->vcibits = 9 - card->vpibits; 3379 } 3380 3381 card->vcimask = 0; 3382 for (k = 0, i = 1; k < card->vcibits; k++) { 3383 card->vcimask |= i; 3384 i <<= 1; 3385 } 3386 3387 IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name); 3388 writel(0, SAR_REG_VPM); 3389 3390 /* Little Endian Order */ 3391 writel(0, SAR_REG_GP); 3392 3393 /* Initialize RAW Cell Handle Register */ 3394 card->raw_cell_hnd = dma_zalloc_coherent(&card->pcidev->dev, 3395 2 * sizeof(u32), 3396 &card->raw_cell_paddr, 3397 GFP_KERNEL); 3398 if (!card->raw_cell_hnd) { 3399 printk("%s: memory allocation failure.\n", card->name); 3400 deinit_card(card); 3401 return -1; 3402 } 3403 writel(card->raw_cell_paddr, SAR_REG_RAWHND); 3404 IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name, 3405 card->raw_cell_hnd); 3406 3407 size = sizeof(struct vc_map *) * card->tct_size; 3408 IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size); 3409 card->vcs = vzalloc(size); 3410 if (!card->vcs) { 3411 printk("%s: memory allocation failure.\n", card->name); 3412 deinit_card(card); 3413 return -1; 3414 } 3415 3416 size = sizeof(struct vc_map *) * card->scd_size; 3417 IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n", 3418 card->name, size); 3419 card->scd2vc = vzalloc(size); 3420 if (!card->scd2vc) { 3421 printk("%s: memory allocation failure.\n", card->name); 3422 deinit_card(card); 3423 return -1; 3424 } 3425 3426 size = sizeof(struct tst_info) * (card->tst_size - 2); 3427 IPRINTK("%s: allocate %d byte for TST to VC mapping.\n", 3428 card->name, size); 3429 card->soft_tst = vmalloc(size); 3430 if (!card->soft_tst) { 3431 printk("%s: memory allocation failure.\n", card->name); 3432 deinit_card(card); 3433 return -1; 3434 } 3435 for (i = 0; i < card->tst_size - 2; i++) { 3436 card->soft_tst[i].tste = TSTE_OPC_VAR; 3437 card->soft_tst[i].vc = NULL; 3438 } 3439 3440 if (dev->phy == NULL) { 3441 printk("%s: No LT device defined.\n", card->name); 3442 deinit_card(card); 3443 return -1; 3444 } 3445 if (dev->phy->ioctl == NULL) { 3446 printk("%s: LT had no IOCTL function defined.\n", card->name); 3447 deinit_card(card); 3448 return -1; 3449 } 3450 3451 #ifdef CONFIG_ATM_IDT77252_USE_SUNI 3452 /* 3453 * this is a jhs hack to get around special functionality in the 3454 * phy driver for the atecom hardware; the functionality doesn't 3455 * exist in the linux atm suni driver 3456 * 3457 * it isn't the right way to do things, but as the guy from NIST 3458 * said, talking about their measurement of the fine structure 3459 * constant, "it's good enough for government work." 3460 */ 3461 linkrate = 149760000; 3462 #endif 3463 3464 card->link_pcr = (linkrate / 8 / 53); 3465 printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n", 3466 card->name, linkrate, card->link_pcr); 3467 3468 #ifdef ATM_IDT77252_SEND_IDLE 3469 card->utopia_pcr = card->link_pcr; 3470 #else 3471 card->utopia_pcr = (160000000 / 8 / 54); 3472 #endif 3473 3474 rsvdcr = 0; 3475 if (card->utopia_pcr > card->link_pcr) 3476 rsvdcr = card->utopia_pcr - card->link_pcr; 3477 3478 tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2); 3479 modl = tmpl % (unsigned long)card->utopia_pcr; 3480 tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr); 3481 if (modl) 3482 tst_entries++; 3483 card->tst_free -= tst_entries; 3484 fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL); 3485 3486 #ifdef HAVE_EEPROM 3487 idt77252_eeprom_init(card); 3488 printk("%s: EEPROM: %02x:", card->name, 3489 idt77252_eeprom_read_status(card)); 3490 3491 for (i = 0; i < 0x80; i++) { 3492 printk(" %02x", 3493 idt77252_eeprom_read_byte(card, i) 3494 ); 3495 } 3496 printk("\n"); 3497 #endif /* HAVE_EEPROM */ 3498 3499 /* 3500 * XXX: <hack> 3501 */ 3502 sprintf(tname, "eth%d", card->index); 3503 tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */ 3504 if (tmp) { 3505 memcpy(card->atmdev->esi, tmp->dev_addr, 6); 3506 dev_put(tmp); 3507 printk("%s: ESI %pM\n", card->name, card->atmdev->esi); 3508 } 3509 /* 3510 * XXX: </hack> 3511 */ 3512 3513 /* Set Maximum Deficit Count for now. */ 3514 writel(0xffff, SAR_REG_MDFCT); 3515 3516 set_bit(IDT77252_BIT_INIT, &card->flags); 3517 3518 XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name); 3519 return 0; 3520 } 3521 3522 3523 /*****************************************************************************/ 3524 /* */ 3525 /* Probing of IDT77252 ABR SAR */ 3526 /* */ 3527 /*****************************************************************************/ 3528 3529 3530 static int idt77252_preset(struct idt77252_dev *card) 3531 { 3532 u16 pci_command; 3533 3534 /*****************************************************************/ 3535 /* P C I C O N F I G U R A T I O N */ 3536 /*****************************************************************/ 3537 3538 XPRINTK("%s: Enable PCI master and memory access for SAR.\n", 3539 card->name); 3540 if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) { 3541 printk("%s: can't read PCI_COMMAND.\n", card->name); 3542 deinit_card(card); 3543 return -1; 3544 } 3545 if (!(pci_command & PCI_COMMAND_IO)) { 3546 printk("%s: PCI_COMMAND: %04x (???)\n", 3547 card->name, pci_command); 3548 deinit_card(card); 3549 return (-1); 3550 } 3551 pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 3552 if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) { 3553 printk("%s: can't write PCI_COMMAND.\n", card->name); 3554 deinit_card(card); 3555 return -1; 3556 } 3557 /*****************************************************************/ 3558 /* G E N E R I C R E S E T */ 3559 /*****************************************************************/ 3560 3561 /* Software reset */ 3562 writel(SAR_CFG_SWRST, SAR_REG_CFG); 3563 mdelay(1); 3564 writel(0, SAR_REG_CFG); 3565 3566 IPRINTK("%s: Software resetted.\n", card->name); 3567 return 0; 3568 } 3569 3570 3571 static unsigned long probe_sram(struct idt77252_dev *card) 3572 { 3573 u32 data, addr; 3574 3575 writel(0, SAR_REG_DR0); 3576 writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD); 3577 3578 for (addr = 0x4000; addr < 0x80000; addr += 0x4000) { 3579 writel(ATM_POISON, SAR_REG_DR0); 3580 writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD); 3581 3582 writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD); 3583 data = readl(SAR_REG_DR0); 3584 3585 if (data != 0) 3586 break; 3587 } 3588 3589 return addr * sizeof(u32); 3590 } 3591 3592 static int idt77252_init_one(struct pci_dev *pcidev, 3593 const struct pci_device_id *id) 3594 { 3595 static struct idt77252_dev **last = &idt77252_chain; 3596 static int index = 0; 3597 3598 unsigned long membase, srambase; 3599 struct idt77252_dev *card; 3600 struct atm_dev *dev; 3601 int i, err; 3602 3603 3604 if ((err = pci_enable_device(pcidev))) { 3605 printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev)); 3606 return err; 3607 } 3608 3609 if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) { 3610 printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev)); 3611 return err; 3612 } 3613 3614 card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL); 3615 if (!card) { 3616 printk("idt77252-%d: can't allocate private data\n", index); 3617 err = -ENOMEM; 3618 goto err_out_disable_pdev; 3619 } 3620 card->revision = pcidev->revision; 3621 card->index = index; 3622 card->pcidev = pcidev; 3623 sprintf(card->name, "idt77252-%d", card->index); 3624 3625 INIT_WORK(&card->tqueue, idt77252_softint); 3626 3627 membase = pci_resource_start(pcidev, 1); 3628 srambase = pci_resource_start(pcidev, 2); 3629 3630 mutex_init(&card->mutex); 3631 spin_lock_init(&card->cmd_lock); 3632 spin_lock_init(&card->tst_lock); 3633 3634 setup_timer(&card->tst_timer, tst_timer, (unsigned long)card); 3635 3636 /* Do the I/O remapping... */ 3637 card->membase = ioremap(membase, 1024); 3638 if (!card->membase) { 3639 printk("%s: can't ioremap() membase\n", card->name); 3640 err = -EIO; 3641 goto err_out_free_card; 3642 } 3643 3644 if (idt77252_preset(card)) { 3645 printk("%s: preset failed\n", card->name); 3646 err = -EIO; 3647 goto err_out_iounmap; 3648 } 3649 3650 dev = atm_dev_register("idt77252", &pcidev->dev, &idt77252_ops, -1, 3651 NULL); 3652 if (!dev) { 3653 printk("%s: can't register atm device\n", card->name); 3654 err = -EIO; 3655 goto err_out_iounmap; 3656 } 3657 dev->dev_data = card; 3658 card->atmdev = dev; 3659 3660 #ifdef CONFIG_ATM_IDT77252_USE_SUNI 3661 suni_init(dev); 3662 if (!dev->phy) { 3663 printk("%s: can't init SUNI\n", card->name); 3664 err = -EIO; 3665 goto err_out_deinit_card; 3666 } 3667 #endif /* CONFIG_ATM_IDT77252_USE_SUNI */ 3668 3669 card->sramsize = probe_sram(card); 3670 3671 for (i = 0; i < 4; i++) { 3672 card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4); 3673 if (!card->fbq[i]) { 3674 printk("%s: can't ioremap() FBQ%d\n", card->name, i); 3675 err = -EIO; 3676 goto err_out_deinit_card; 3677 } 3678 } 3679 3680 printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n", 3681 card->name, ((card->revision > 1) && (card->revision < 25)) ? 3682 'A' + card->revision - 1 : '?', membase, srambase, 3683 card->sramsize / 1024); 3684 3685 if (init_card(dev)) { 3686 printk("%s: init_card failed\n", card->name); 3687 err = -EIO; 3688 goto err_out_deinit_card; 3689 } 3690 3691 dev->ci_range.vpi_bits = card->vpibits; 3692 dev->ci_range.vci_bits = card->vcibits; 3693 dev->link_rate = card->link_pcr; 3694 3695 if (dev->phy->start) 3696 dev->phy->start(dev); 3697 3698 if (idt77252_dev_open(card)) { 3699 printk("%s: dev_open failed\n", card->name); 3700 err = -EIO; 3701 goto err_out_stop; 3702 } 3703 3704 *last = card; 3705 last = &card->next; 3706 index++; 3707 3708 return 0; 3709 3710 err_out_stop: 3711 if (dev->phy->stop) 3712 dev->phy->stop(dev); 3713 3714 err_out_deinit_card: 3715 deinit_card(card); 3716 3717 err_out_iounmap: 3718 iounmap(card->membase); 3719 3720 err_out_free_card: 3721 kfree(card); 3722 3723 err_out_disable_pdev: 3724 pci_disable_device(pcidev); 3725 return err; 3726 } 3727 3728 static const struct pci_device_id idt77252_pci_tbl[] = 3729 { 3730 { PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 }, 3731 { 0, } 3732 }; 3733 3734 MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl); 3735 3736 static struct pci_driver idt77252_driver = { 3737 .name = "idt77252", 3738 .id_table = idt77252_pci_tbl, 3739 .probe = idt77252_init_one, 3740 }; 3741 3742 static int __init idt77252_init(void) 3743 { 3744 struct sk_buff *skb; 3745 3746 printk("%s: at %p\n", __func__, idt77252_init); 3747 3748 if (sizeof(skb->cb) < sizeof(struct atm_skb_data) + 3749 sizeof(struct idt77252_skb_prv)) { 3750 printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n", 3751 __func__, (unsigned long) sizeof(skb->cb), 3752 (unsigned long) sizeof(struct atm_skb_data) + 3753 sizeof(struct idt77252_skb_prv)); 3754 return -EIO; 3755 } 3756 3757 return pci_register_driver(&idt77252_driver); 3758 } 3759 3760 static void __exit idt77252_exit(void) 3761 { 3762 struct idt77252_dev *card; 3763 struct atm_dev *dev; 3764 3765 pci_unregister_driver(&idt77252_driver); 3766 3767 while (idt77252_chain) { 3768 card = idt77252_chain; 3769 dev = card->atmdev; 3770 idt77252_chain = card->next; 3771 3772 if (dev->phy->stop) 3773 dev->phy->stop(dev); 3774 deinit_card(card); 3775 pci_disable_device(card->pcidev); 3776 kfree(card); 3777 } 3778 3779 DIPRINTK("idt77252: finished cleanup-module().\n"); 3780 } 3781 3782 module_init(idt77252_init); 3783 module_exit(idt77252_exit); 3784 3785 MODULE_LICENSE("GPL"); 3786 3787 module_param(vpibits, uint, 0); 3788 MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)"); 3789 #ifdef CONFIG_ATM_IDT77252_DEBUG 3790 module_param(debug, ulong, 0644); 3791 MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h"); 3792 #endif 3793 3794 MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>"); 3795 MODULE_DESCRIPTION("IDT77252 ABR SAR Driver"); 3796