1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board. 4 * 5 * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>. 6 * 7 * Thanks to Essential Communication for providing us with hardware 8 * and very comprehensive documentation without which I would not have 9 * been able to write this driver. A special thank you to John Gibbon 10 * for sorting out the legal issues, with the NDA, allowing the code to 11 * be released under the GPL. 12 * 13 * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the 14 * stupid bugs in my code. 15 * 16 * Softnet support and various other patches from Val Henson of 17 * ODS/Essential. 18 * 19 * PCI DMA mapping code partly based on work by Francois Romieu. 20 */ 21 22 23#define DEBUG 1 24#define RX_DMA_SKBUFF 1 25#define PKT_COPY_THRESHOLD 512 26 27#include <linux/module.h> 28#include <linux/types.h> 29#include <linux/errno.h> 30#include <linux/ioport.h> 31#include <linux/pci.h> 32#include <linux/kernel.h> 33#include <linux/netdevice.h> 34#include <linux/hippidevice.h> 35#include <linux/skbuff.h> 36#include <linux/delay.h> 37#include <linux/mm.h> 38#include <linux/slab.h> 39#include <net/sock.h> 40 41#include <asm/cache.h> 42#include <asm/byteorder.h> 43#include <asm/io.h> 44#include <asm/irq.h> 45#include <linux/uaccess.h> 46 47#define rr_if_busy(dev) netif_queue_stopped(dev) 48#define rr_if_running(dev) netif_running(dev) 49 50#include "rrunner.h" 51 52#define RUN_AT(x) (jiffies + (x)) 53 54 55MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>"); 56MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver"); 57MODULE_LICENSE("GPL"); 58 59static const char version[] = 60"rrunner.c: v0.50 11/11/2002 Jes Sorensen (jes@wildopensource.com)\n"; 61 62 63static const struct net_device_ops rr_netdev_ops = { 64 .ndo_open = rr_open, 65 .ndo_stop = rr_close, 66 .ndo_do_ioctl = rr_ioctl, 67 .ndo_start_xmit = rr_start_xmit, 68 .ndo_set_mac_address = hippi_mac_addr, 69}; 70 71/* 72 * Implementation notes: 73 * 74 * The DMA engine only allows for DMA within physical 64KB chunks of 75 * memory. The current approach of the driver (and stack) is to use 76 * linear blocks of memory for the skbuffs. However, as the data block 77 * is always the first part of the skb and skbs are 2^n aligned so we 78 * are guarantted to get the whole block within one 64KB align 64KB 79 * chunk. 80 * 81 * On the long term, relying on being able to allocate 64KB linear 82 * chunks of memory is not feasible and the skb handling code and the 83 * stack will need to know about I/O vectors or something similar. 84 */ 85 86static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 87{ 88 struct net_device *dev; 89 static int version_disp; 90 u8 pci_latency; 91 struct rr_private *rrpriv; 92 void *tmpptr; 93 dma_addr_t ring_dma; 94 int ret = -ENOMEM; 95 96 dev = alloc_hippi_dev(sizeof(struct rr_private)); 97 if (!dev) 98 goto out3; 99 100 ret = pci_enable_device(pdev); 101 if (ret) { 102 ret = -ENODEV; 103 goto out2; 104 } 105 106 rrpriv = netdev_priv(dev); 107 108 SET_NETDEV_DEV(dev, &pdev->dev); 109 110 ret = pci_request_regions(pdev, "rrunner"); 111 if (ret < 0) 112 goto out; 113 114 pci_set_drvdata(pdev, dev); 115 116 rrpriv->pci_dev = pdev; 117 118 spin_lock_init(&rrpriv->lock); 119 120 dev->netdev_ops = &rr_netdev_ops; 121 122 /* display version info if adapter is found */ 123 if (!version_disp) { 124 /* set display flag to TRUE so that */ 125 /* we only display this string ONCE */ 126 version_disp = 1; 127 printk(version); 128 } 129 130 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency); 131 if (pci_latency <= 0x58){ 132 pci_latency = 0x58; 133 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency); 134 } 135 136 pci_set_master(pdev); 137 138 printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI " 139 "at 0x%llx, irq %i, PCI latency %i\n", dev->name, 140 (unsigned long long)pci_resource_start(pdev, 0), 141 pdev->irq, pci_latency); 142 143 /* 144 * Remap the MMIO regs into kernel space. 145 */ 146 rrpriv->regs = pci_iomap(pdev, 0, 0x1000); 147 if (!rrpriv->regs) { 148 printk(KERN_ERR "%s: Unable to map I/O register, " 149 "RoadRunner will be disabled.\n", dev->name); 150 ret = -EIO; 151 goto out; 152 } 153 154 tmpptr = dma_alloc_coherent(&pdev->dev, TX_TOTAL_SIZE, &ring_dma, 155 GFP_KERNEL); 156 rrpriv->tx_ring = tmpptr; 157 rrpriv->tx_ring_dma = ring_dma; 158 159 if (!tmpptr) { 160 ret = -ENOMEM; 161 goto out; 162 } 163 164 tmpptr = dma_alloc_coherent(&pdev->dev, RX_TOTAL_SIZE, &ring_dma, 165 GFP_KERNEL); 166 rrpriv->rx_ring = tmpptr; 167 rrpriv->rx_ring_dma = ring_dma; 168 169 if (!tmpptr) { 170 ret = -ENOMEM; 171 goto out; 172 } 173 174 tmpptr = dma_alloc_coherent(&pdev->dev, EVT_RING_SIZE, &ring_dma, 175 GFP_KERNEL); 176 rrpriv->evt_ring = tmpptr; 177 rrpriv->evt_ring_dma = ring_dma; 178 179 if (!tmpptr) { 180 ret = -ENOMEM; 181 goto out; 182 } 183 184 /* 185 * Don't access any register before this point! 186 */ 187#ifdef __BIG_ENDIAN 188 writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP, 189 &rrpriv->regs->HostCtrl); 190#endif 191 /* 192 * Need to add a case for little-endian 64-bit hosts here. 193 */ 194 195 rr_init(dev); 196 197 ret = register_netdev(dev); 198 if (ret) 199 goto out; 200 return 0; 201 202 out: 203 if (rrpriv->evt_ring) 204 dma_free_coherent(&pdev->dev, EVT_RING_SIZE, rrpriv->evt_ring, 205 rrpriv->evt_ring_dma); 206 if (rrpriv->rx_ring) 207 dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, rrpriv->rx_ring, 208 rrpriv->rx_ring_dma); 209 if (rrpriv->tx_ring) 210 dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, rrpriv->tx_ring, 211 rrpriv->tx_ring_dma); 212 if (rrpriv->regs) 213 pci_iounmap(pdev, rrpriv->regs); 214 if (pdev) 215 pci_release_regions(pdev); 216 out2: 217 free_netdev(dev); 218 out3: 219 return ret; 220} 221 222static void rr_remove_one(struct pci_dev *pdev) 223{ 224 struct net_device *dev = pci_get_drvdata(pdev); 225 struct rr_private *rr = netdev_priv(dev); 226 227 if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)) { 228 printk(KERN_ERR "%s: trying to unload running NIC\n", 229 dev->name); 230 writel(HALT_NIC, &rr->regs->HostCtrl); 231 } 232 233 unregister_netdev(dev); 234 dma_free_coherent(&pdev->dev, EVT_RING_SIZE, rr->evt_ring, 235 rr->evt_ring_dma); 236 dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, rr->rx_ring, 237 rr->rx_ring_dma); 238 dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, rr->tx_ring, 239 rr->tx_ring_dma); 240 pci_iounmap(pdev, rr->regs); 241 pci_release_regions(pdev); 242 pci_disable_device(pdev); 243 free_netdev(dev); 244} 245 246 247/* 248 * Commands are considered to be slow, thus there is no reason to 249 * inline this. 250 */ 251static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd) 252{ 253 struct rr_regs __iomem *regs; 254 u32 idx; 255 256 regs = rrpriv->regs; 257 /* 258 * This is temporary - it will go away in the final version. 259 * We probably also want to make this function inline. 260 */ 261 if (readl(®s->HostCtrl) & NIC_HALTED){ 262 printk("issuing command for halted NIC, code 0x%x, " 263 "HostCtrl %08x\n", cmd->code, readl(®s->HostCtrl)); 264 if (readl(®s->Mode) & FATAL_ERR) 265 printk("error codes Fail1 %02x, Fail2 %02x\n", 266 readl(®s->Fail1), readl(®s->Fail2)); 267 } 268 269 idx = rrpriv->info->cmd_ctrl.pi; 270 271 writel(*(u32*)(cmd), ®s->CmdRing[idx]); 272 wmb(); 273 274 idx = (idx - 1) % CMD_RING_ENTRIES; 275 rrpriv->info->cmd_ctrl.pi = idx; 276 wmb(); 277 278 if (readl(®s->Mode) & FATAL_ERR) 279 printk("error code %02x\n", readl(®s->Fail1)); 280} 281 282 283/* 284 * Reset the board in a sensible manner. The NIC is already halted 285 * when we get here and a spin-lock is held. 286 */ 287static int rr_reset(struct net_device *dev) 288{ 289 struct rr_private *rrpriv; 290 struct rr_regs __iomem *regs; 291 u32 start_pc; 292 int i; 293 294 rrpriv = netdev_priv(dev); 295 regs = rrpriv->regs; 296 297 rr_load_firmware(dev); 298 299 writel(0x01000000, ®s->TX_state); 300 writel(0xff800000, ®s->RX_state); 301 writel(0, ®s->AssistState); 302 writel(CLEAR_INTA, ®s->LocalCtrl); 303 writel(0x01, ®s->BrkPt); 304 writel(0, ®s->Timer); 305 writel(0, ®s->TimerRef); 306 writel(RESET_DMA, ®s->DmaReadState); 307 writel(RESET_DMA, ®s->DmaWriteState); 308 writel(0, ®s->DmaWriteHostHi); 309 writel(0, ®s->DmaWriteHostLo); 310 writel(0, ®s->DmaReadHostHi); 311 writel(0, ®s->DmaReadHostLo); 312 writel(0, ®s->DmaReadLen); 313 writel(0, ®s->DmaWriteLen); 314 writel(0, ®s->DmaWriteLcl); 315 writel(0, ®s->DmaWriteIPchecksum); 316 writel(0, ®s->DmaReadLcl); 317 writel(0, ®s->DmaReadIPchecksum); 318 writel(0, ®s->PciState); 319#if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN 320 writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, ®s->Mode); 321#elif (BITS_PER_LONG == 64) 322 writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, ®s->Mode); 323#else 324 writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, ®s->Mode); 325#endif 326 327#if 0 328 /* 329 * Don't worry, this is just black magic. 330 */ 331 writel(0xdf000, ®s->RxBase); 332 writel(0xdf000, ®s->RxPrd); 333 writel(0xdf000, ®s->RxCon); 334 writel(0xce000, ®s->TxBase); 335 writel(0xce000, ®s->TxPrd); 336 writel(0xce000, ®s->TxCon); 337 writel(0, ®s->RxIndPro); 338 writel(0, ®s->RxIndCon); 339 writel(0, ®s->RxIndRef); 340 writel(0, ®s->TxIndPro); 341 writel(0, ®s->TxIndCon); 342 writel(0, ®s->TxIndRef); 343 writel(0xcc000, ®s->pad10[0]); 344 writel(0, ®s->DrCmndPro); 345 writel(0, ®s->DrCmndCon); 346 writel(0, ®s->DwCmndPro); 347 writel(0, ®s->DwCmndCon); 348 writel(0, ®s->DwCmndRef); 349 writel(0, ®s->DrDataPro); 350 writel(0, ®s->DrDataCon); 351 writel(0, ®s->DrDataRef); 352 writel(0, ®s->DwDataPro); 353 writel(0, ®s->DwDataCon); 354 writel(0, ®s->DwDataRef); 355#endif 356 357 writel(0xffffffff, ®s->MbEvent); 358 writel(0, ®s->Event); 359 360 writel(0, ®s->TxPi); 361 writel(0, ®s->IpRxPi); 362 363 writel(0, ®s->EvtCon); 364 writel(0, ®s->EvtPrd); 365 366 rrpriv->info->evt_ctrl.pi = 0; 367 368 for (i = 0; i < CMD_RING_ENTRIES; i++) 369 writel(0, ®s->CmdRing[i]); 370 371/* 372 * Why 32 ? is this not cache line size dependent? 373 */ 374 writel(RBURST_64|WBURST_64, ®s->PciState); 375 wmb(); 376 377 start_pc = rr_read_eeprom_word(rrpriv, 378 offsetof(struct eeprom, rncd_info.FwStart)); 379 380#if (DEBUG > 1) 381 printk("%s: Executing firmware at address 0x%06x\n", 382 dev->name, start_pc); 383#endif 384 385 writel(start_pc + 0x800, ®s->Pc); 386 wmb(); 387 udelay(5); 388 389 writel(start_pc, ®s->Pc); 390 wmb(); 391 392 return 0; 393} 394 395 396/* 397 * Read a string from the EEPROM. 398 */ 399static unsigned int rr_read_eeprom(struct rr_private *rrpriv, 400 unsigned long offset, 401 unsigned char *buf, 402 unsigned long length) 403{ 404 struct rr_regs __iomem *regs = rrpriv->regs; 405 u32 misc, io, host, i; 406 407 io = readl(®s->ExtIo); 408 writel(0, ®s->ExtIo); 409 misc = readl(®s->LocalCtrl); 410 writel(0, ®s->LocalCtrl); 411 host = readl(®s->HostCtrl); 412 writel(host | HALT_NIC, ®s->HostCtrl); 413 mb(); 414 415 for (i = 0; i < length; i++){ 416 writel((EEPROM_BASE + ((offset+i) << 3)), ®s->WinBase); 417 mb(); 418 buf[i] = (readl(®s->WinData) >> 24) & 0xff; 419 mb(); 420 } 421 422 writel(host, ®s->HostCtrl); 423 writel(misc, ®s->LocalCtrl); 424 writel(io, ®s->ExtIo); 425 mb(); 426 return i; 427} 428 429 430/* 431 * Shortcut to read one word (4 bytes) out of the EEPROM and convert 432 * it to our CPU byte-order. 433 */ 434static u32 rr_read_eeprom_word(struct rr_private *rrpriv, 435 size_t offset) 436{ 437 __be32 word; 438 439 if ((rr_read_eeprom(rrpriv, offset, 440 (unsigned char *)&word, 4) == 4)) 441 return be32_to_cpu(word); 442 return 0; 443} 444 445 446/* 447 * Write a string to the EEPROM. 448 * 449 * This is only called when the firmware is not running. 450 */ 451static unsigned int write_eeprom(struct rr_private *rrpriv, 452 unsigned long offset, 453 unsigned char *buf, 454 unsigned long length) 455{ 456 struct rr_regs __iomem *regs = rrpriv->regs; 457 u32 misc, io, data, i, j, ready, error = 0; 458 459 io = readl(®s->ExtIo); 460 writel(0, ®s->ExtIo); 461 misc = readl(®s->LocalCtrl); 462 writel(ENABLE_EEPROM_WRITE, ®s->LocalCtrl); 463 mb(); 464 465 for (i = 0; i < length; i++){ 466 writel((EEPROM_BASE + ((offset+i) << 3)), ®s->WinBase); 467 mb(); 468 data = buf[i] << 24; 469 /* 470 * Only try to write the data if it is not the same 471 * value already. 472 */ 473 if ((readl(®s->WinData) & 0xff000000) != data){ 474 writel(data, ®s->WinData); 475 ready = 0; 476 j = 0; 477 mb(); 478 while(!ready){ 479 udelay(20); 480 if ((readl(®s->WinData) & 0xff000000) == 481 data) 482 ready = 1; 483 mb(); 484 if (j++ > 5000){ 485 printk("data mismatch: %08x, " 486 "WinData %08x\n", data, 487 readl(®s->WinData)); 488 ready = 1; 489 error = 1; 490 } 491 } 492 } 493 } 494 495 writel(misc, ®s->LocalCtrl); 496 writel(io, ®s->ExtIo); 497 mb(); 498 499 return error; 500} 501 502 503static int rr_init(struct net_device *dev) 504{ 505 struct rr_private *rrpriv; 506 struct rr_regs __iomem *regs; 507 u32 sram_size, rev; 508 509 rrpriv = netdev_priv(dev); 510 regs = rrpriv->regs; 511 512 rev = readl(®s->FwRev); 513 rrpriv->fw_rev = rev; 514 if (rev > 0x00020024) 515 printk(" Firmware revision: %i.%i.%i\n", (rev >> 16), 516 ((rev >> 8) & 0xff), (rev & 0xff)); 517 else if (rev >= 0x00020000) { 518 printk(" Firmware revision: %i.%i.%i (2.0.37 or " 519 "later is recommended)\n", (rev >> 16), 520 ((rev >> 8) & 0xff), (rev & 0xff)); 521 }else{ 522 printk(" Firmware revision too old: %i.%i.%i, please " 523 "upgrade to 2.0.37 or later.\n", 524 (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff)); 525 } 526 527#if (DEBUG > 2) 528 printk(" Maximum receive rings %i\n", readl(®s->MaxRxRng)); 529#endif 530 531 /* 532 * Read the hardware address from the eeprom. The HW address 533 * is not really necessary for HIPPI but awfully convenient. 534 * The pointer arithmetic to put it in dev_addr is ugly, but 535 * Donald Becker does it this way for the GigE version of this 536 * card and it's shorter and more portable than any 537 * other method I've seen. -VAL 538 */ 539 540 *(__be16 *)(dev->dev_addr) = 541 htons(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA))); 542 *(__be32 *)(dev->dev_addr+2) = 543 htonl(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA[4]))); 544 545 printk(" MAC: %pM\n", dev->dev_addr); 546 547 sram_size = rr_read_eeprom_word(rrpriv, 8); 548 printk(" SRAM size 0x%06x\n", sram_size); 549 550 return 0; 551} 552 553 554static int rr_init1(struct net_device *dev) 555{ 556 struct rr_private *rrpriv; 557 struct rr_regs __iomem *regs; 558 unsigned long myjif, flags; 559 struct cmd cmd; 560 u32 hostctrl; 561 int ecode = 0; 562 short i; 563 564 rrpriv = netdev_priv(dev); 565 regs = rrpriv->regs; 566 567 spin_lock_irqsave(&rrpriv->lock, flags); 568 569 hostctrl = readl(®s->HostCtrl); 570 writel(hostctrl | HALT_NIC | RR_CLEAR_INT, ®s->HostCtrl); 571 wmb(); 572 573 if (hostctrl & PARITY_ERR){ 574 printk("%s: Parity error halting NIC - this is serious!\n", 575 dev->name); 576 spin_unlock_irqrestore(&rrpriv->lock, flags); 577 ecode = -EFAULT; 578 goto error; 579 } 580 581 set_rxaddr(regs, rrpriv->rx_ctrl_dma); 582 set_infoaddr(regs, rrpriv->info_dma); 583 584 rrpriv->info->evt_ctrl.entry_size = sizeof(struct event); 585 rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES; 586 rrpriv->info->evt_ctrl.mode = 0; 587 rrpriv->info->evt_ctrl.pi = 0; 588 set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma); 589 590 rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd); 591 rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES; 592 rrpriv->info->cmd_ctrl.mode = 0; 593 rrpriv->info->cmd_ctrl.pi = 15; 594 595 for (i = 0; i < CMD_RING_ENTRIES; i++) { 596 writel(0, ®s->CmdRing[i]); 597 } 598 599 for (i = 0; i < TX_RING_ENTRIES; i++) { 600 rrpriv->tx_ring[i].size = 0; 601 set_rraddr(&rrpriv->tx_ring[i].addr, 0); 602 rrpriv->tx_skbuff[i] = NULL; 603 } 604 rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc); 605 rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES; 606 rrpriv->info->tx_ctrl.mode = 0; 607 rrpriv->info->tx_ctrl.pi = 0; 608 set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma); 609 610 /* 611 * Set dirty_tx before we start receiving interrupts, otherwise 612 * the interrupt handler might think it is supposed to process 613 * tx ints before we are up and running, which may cause a null 614 * pointer access in the int handler. 615 */ 616 rrpriv->tx_full = 0; 617 rrpriv->cur_rx = 0; 618 rrpriv->dirty_rx = rrpriv->dirty_tx = 0; 619 620 rr_reset(dev); 621 622 /* Tuning values */ 623 writel(0x5000, ®s->ConRetry); 624 writel(0x100, ®s->ConRetryTmr); 625 writel(0x500000, ®s->ConTmout); 626 writel(0x60, ®s->IntrTmr); 627 writel(0x500000, ®s->TxDataMvTimeout); 628 writel(0x200000, ®s->RxDataMvTimeout); 629 writel(0x80, ®s->WriteDmaThresh); 630 writel(0x80, ®s->ReadDmaThresh); 631 632 rrpriv->fw_running = 0; 633 wmb(); 634 635 hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR); 636 writel(hostctrl, ®s->HostCtrl); 637 wmb(); 638 639 spin_unlock_irqrestore(&rrpriv->lock, flags); 640 641 for (i = 0; i < RX_RING_ENTRIES; i++) { 642 struct sk_buff *skb; 643 dma_addr_t addr; 644 645 rrpriv->rx_ring[i].mode = 0; 646 skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC); 647 if (!skb) { 648 printk(KERN_WARNING "%s: Unable to allocate memory " 649 "for receive ring - halting NIC\n", dev->name); 650 ecode = -ENOMEM; 651 goto error; 652 } 653 rrpriv->rx_skbuff[i] = skb; 654 addr = dma_map_single(&rrpriv->pci_dev->dev, skb->data, 655 dev->mtu + HIPPI_HLEN, DMA_FROM_DEVICE); 656 /* 657 * Sanity test to see if we conflict with the DMA 658 * limitations of the Roadrunner. 659 */ 660 if ((((unsigned long)skb->data) & 0xfff) > ~65320) 661 printk("skb alloc error\n"); 662 663 set_rraddr(&rrpriv->rx_ring[i].addr, addr); 664 rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN; 665 } 666 667 rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc); 668 rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES; 669 rrpriv->rx_ctrl[4].mode = 8; 670 rrpriv->rx_ctrl[4].pi = 0; 671 wmb(); 672 set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma); 673 674 udelay(1000); 675 676 /* 677 * Now start the FirmWare. 678 */ 679 cmd.code = C_START_FW; 680 cmd.ring = 0; 681 cmd.index = 0; 682 683 rr_issue_cmd(rrpriv, &cmd); 684 685 /* 686 * Give the FirmWare time to chew on the `get running' command. 687 */ 688 myjif = jiffies + 5 * HZ; 689 while (time_before(jiffies, myjif) && !rrpriv->fw_running) 690 cpu_relax(); 691 692 netif_start_queue(dev); 693 694 return ecode; 695 696 error: 697 /* 698 * We might have gotten here because we are out of memory, 699 * make sure we release everything we allocated before failing 700 */ 701 for (i = 0; i < RX_RING_ENTRIES; i++) { 702 struct sk_buff *skb = rrpriv->rx_skbuff[i]; 703 704 if (skb) { 705 dma_unmap_single(&rrpriv->pci_dev->dev, 706 rrpriv->rx_ring[i].addr.addrlo, 707 dev->mtu + HIPPI_HLEN, 708 DMA_FROM_DEVICE); 709 rrpriv->rx_ring[i].size = 0; 710 set_rraddr(&rrpriv->rx_ring[i].addr, 0); 711 dev_kfree_skb(skb); 712 rrpriv->rx_skbuff[i] = NULL; 713 } 714 } 715 return ecode; 716} 717 718 719/* 720 * All events are considered to be slow (RX/TX ints do not generate 721 * events) and are handled here, outside the main interrupt handler, 722 * to reduce the size of the handler. 723 */ 724static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx) 725{ 726 struct rr_private *rrpriv; 727 struct rr_regs __iomem *regs; 728 u32 tmp; 729 730 rrpriv = netdev_priv(dev); 731 regs = rrpriv->regs; 732 733 while (prodidx != eidx){ 734 switch (rrpriv->evt_ring[eidx].code){ 735 case E_NIC_UP: 736 tmp = readl(®s->FwRev); 737 printk(KERN_INFO "%s: Firmware revision %i.%i.%i " 738 "up and running\n", dev->name, 739 (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff)); 740 rrpriv->fw_running = 1; 741 writel(RX_RING_ENTRIES - 1, ®s->IpRxPi); 742 wmb(); 743 break; 744 case E_LINK_ON: 745 printk(KERN_INFO "%s: Optical link ON\n", dev->name); 746 break; 747 case E_LINK_OFF: 748 printk(KERN_INFO "%s: Optical link OFF\n", dev->name); 749 break; 750 case E_RX_IDLE: 751 printk(KERN_WARNING "%s: RX data not moving\n", 752 dev->name); 753 goto drop; 754 case E_WATCHDOG: 755 printk(KERN_INFO "%s: The watchdog is here to see " 756 "us\n", dev->name); 757 break; 758 case E_INTERN_ERR: 759 printk(KERN_ERR "%s: HIPPI Internal NIC error\n", 760 dev->name); 761 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 762 ®s->HostCtrl); 763 wmb(); 764 break; 765 case E_HOST_ERR: 766 printk(KERN_ERR "%s: Host software error\n", 767 dev->name); 768 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 769 ®s->HostCtrl); 770 wmb(); 771 break; 772 /* 773 * TX events. 774 */ 775 case E_CON_REJ: 776 printk(KERN_WARNING "%s: Connection rejected\n", 777 dev->name); 778 dev->stats.tx_aborted_errors++; 779 break; 780 case E_CON_TMOUT: 781 printk(KERN_WARNING "%s: Connection timeout\n", 782 dev->name); 783 break; 784 case E_DISC_ERR: 785 printk(KERN_WARNING "%s: HIPPI disconnect error\n", 786 dev->name); 787 dev->stats.tx_aborted_errors++; 788 break; 789 case E_INT_PRTY: 790 printk(KERN_ERR "%s: HIPPI Internal Parity error\n", 791 dev->name); 792 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 793 ®s->HostCtrl); 794 wmb(); 795 break; 796 case E_TX_IDLE: 797 printk(KERN_WARNING "%s: Transmitter idle\n", 798 dev->name); 799 break; 800 case E_TX_LINK_DROP: 801 printk(KERN_WARNING "%s: Link lost during transmit\n", 802 dev->name); 803 dev->stats.tx_aborted_errors++; 804 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 805 ®s->HostCtrl); 806 wmb(); 807 break; 808 case E_TX_INV_RNG: 809 printk(KERN_ERR "%s: Invalid send ring block\n", 810 dev->name); 811 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 812 ®s->HostCtrl); 813 wmb(); 814 break; 815 case E_TX_INV_BUF: 816 printk(KERN_ERR "%s: Invalid send buffer address\n", 817 dev->name); 818 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 819 ®s->HostCtrl); 820 wmb(); 821 break; 822 case E_TX_INV_DSC: 823 printk(KERN_ERR "%s: Invalid descriptor address\n", 824 dev->name); 825 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 826 ®s->HostCtrl); 827 wmb(); 828 break; 829 /* 830 * RX events. 831 */ 832 case E_RX_RNG_OUT: 833 printk(KERN_INFO "%s: Receive ring full\n", dev->name); 834 break; 835 836 case E_RX_PAR_ERR: 837 printk(KERN_WARNING "%s: Receive parity error\n", 838 dev->name); 839 goto drop; 840 case E_RX_LLRC_ERR: 841 printk(KERN_WARNING "%s: Receive LLRC error\n", 842 dev->name); 843 goto drop; 844 case E_PKT_LN_ERR: 845 printk(KERN_WARNING "%s: Receive packet length " 846 "error\n", dev->name); 847 goto drop; 848 case E_DTA_CKSM_ERR: 849 printk(KERN_WARNING "%s: Data checksum error\n", 850 dev->name); 851 goto drop; 852 case E_SHT_BST: 853 printk(KERN_WARNING "%s: Unexpected short burst " 854 "error\n", dev->name); 855 goto drop; 856 case E_STATE_ERR: 857 printk(KERN_WARNING "%s: Recv. state transition" 858 " error\n", dev->name); 859 goto drop; 860 case E_UNEXP_DATA: 861 printk(KERN_WARNING "%s: Unexpected data error\n", 862 dev->name); 863 goto drop; 864 case E_LST_LNK_ERR: 865 printk(KERN_WARNING "%s: Link lost error\n", 866 dev->name); 867 goto drop; 868 case E_FRM_ERR: 869 printk(KERN_WARNING "%s: Framing Error\n", 870 dev->name); 871 goto drop; 872 case E_FLG_SYN_ERR: 873 printk(KERN_WARNING "%s: Flag sync. lost during " 874 "packet\n", dev->name); 875 goto drop; 876 case E_RX_INV_BUF: 877 printk(KERN_ERR "%s: Invalid receive buffer " 878 "address\n", dev->name); 879 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 880 ®s->HostCtrl); 881 wmb(); 882 break; 883 case E_RX_INV_DSC: 884 printk(KERN_ERR "%s: Invalid receive descriptor " 885 "address\n", dev->name); 886 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 887 ®s->HostCtrl); 888 wmb(); 889 break; 890 case E_RNG_BLK: 891 printk(KERN_ERR "%s: Invalid ring block\n", 892 dev->name); 893 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 894 ®s->HostCtrl); 895 wmb(); 896 break; 897 drop: 898 /* Label packet to be dropped. 899 * Actual dropping occurs in rx 900 * handling. 901 * 902 * The index of packet we get to drop is 903 * the index of the packet following 904 * the bad packet. -kbf 905 */ 906 { 907 u16 index = rrpriv->evt_ring[eidx].index; 908 index = (index + (RX_RING_ENTRIES - 1)) % 909 RX_RING_ENTRIES; 910 rrpriv->rx_ring[index].mode |= 911 (PACKET_BAD | PACKET_END); 912 } 913 break; 914 default: 915 printk(KERN_WARNING "%s: Unhandled event 0x%02x\n", 916 dev->name, rrpriv->evt_ring[eidx].code); 917 } 918 eidx = (eidx + 1) % EVT_RING_ENTRIES; 919 } 920 921 rrpriv->info->evt_ctrl.pi = eidx; 922 wmb(); 923 return eidx; 924} 925 926 927static void rx_int(struct net_device *dev, u32 rxlimit, u32 index) 928{ 929 struct rr_private *rrpriv = netdev_priv(dev); 930 struct rr_regs __iomem *regs = rrpriv->regs; 931 932 do { 933 struct rx_desc *desc; 934 u32 pkt_len; 935 936 desc = &(rrpriv->rx_ring[index]); 937 pkt_len = desc->size; 938#if (DEBUG > 2) 939 printk("index %i, rxlimit %i\n", index, rxlimit); 940 printk("len %x, mode %x\n", pkt_len, desc->mode); 941#endif 942 if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){ 943 dev->stats.rx_dropped++; 944 goto defer; 945 } 946 947 if (pkt_len > 0){ 948 struct sk_buff *skb, *rx_skb; 949 950 rx_skb = rrpriv->rx_skbuff[index]; 951 952 if (pkt_len < PKT_COPY_THRESHOLD) { 953 skb = alloc_skb(pkt_len, GFP_ATOMIC); 954 if (skb == NULL){ 955 printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len); 956 dev->stats.rx_dropped++; 957 goto defer; 958 } else { 959 dma_sync_single_for_cpu(&rrpriv->pci_dev->dev, 960 desc->addr.addrlo, 961 pkt_len, 962 DMA_FROM_DEVICE); 963 964 skb_put_data(skb, rx_skb->data, 965 pkt_len); 966 967 dma_sync_single_for_device(&rrpriv->pci_dev->dev, 968 desc->addr.addrlo, 969 pkt_len, 970 DMA_FROM_DEVICE); 971 } 972 }else{ 973 struct sk_buff *newskb; 974 975 newskb = alloc_skb(dev->mtu + HIPPI_HLEN, 976 GFP_ATOMIC); 977 if (newskb){ 978 dma_addr_t addr; 979 980 dma_unmap_single(&rrpriv->pci_dev->dev, 981 desc->addr.addrlo, 982 dev->mtu + HIPPI_HLEN, 983 DMA_FROM_DEVICE); 984 skb = rx_skb; 985 skb_put(skb, pkt_len); 986 rrpriv->rx_skbuff[index] = newskb; 987 addr = dma_map_single(&rrpriv->pci_dev->dev, 988 newskb->data, 989 dev->mtu + HIPPI_HLEN, 990 DMA_FROM_DEVICE); 991 set_rraddr(&desc->addr, addr); 992 } else { 993 printk("%s: Out of memory, deferring " 994 "packet\n", dev->name); 995 dev->stats.rx_dropped++; 996 goto defer; 997 } 998 } 999 skb->protocol = hippi_type_trans(skb, dev); 1000 1001 netif_rx(skb); /* send it up */ 1002 1003 dev->stats.rx_packets++; 1004 dev->stats.rx_bytes += pkt_len; 1005 } 1006 defer: 1007 desc->mode = 0; 1008 desc->size = dev->mtu + HIPPI_HLEN; 1009 1010 if ((index & 7) == 7) 1011 writel(index, ®s->IpRxPi); 1012 1013 index = (index + 1) % RX_RING_ENTRIES; 1014 } while(index != rxlimit); 1015 1016 rrpriv->cur_rx = index; 1017 wmb(); 1018} 1019 1020 1021static irqreturn_t rr_interrupt(int irq, void *dev_id) 1022{ 1023 struct rr_private *rrpriv; 1024 struct rr_regs __iomem *regs; 1025 struct net_device *dev = (struct net_device *)dev_id; 1026 u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon; 1027 1028 rrpriv = netdev_priv(dev); 1029 regs = rrpriv->regs; 1030 1031 if (!(readl(®s->HostCtrl) & RR_INT)) 1032 return IRQ_NONE; 1033 1034 spin_lock(&rrpriv->lock); 1035 1036 prodidx = readl(®s->EvtPrd); 1037 txcsmr = (prodidx >> 8) & 0xff; 1038 rxlimit = (prodidx >> 16) & 0xff; 1039 prodidx &= 0xff; 1040 1041#if (DEBUG > 2) 1042 printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name, 1043 prodidx, rrpriv->info->evt_ctrl.pi); 1044#endif 1045 /* 1046 * Order here is important. We must handle events 1047 * before doing anything else in order to catch 1048 * such things as LLRC errors, etc -kbf 1049 */ 1050 1051 eidx = rrpriv->info->evt_ctrl.pi; 1052 if (prodidx != eidx) 1053 eidx = rr_handle_event(dev, prodidx, eidx); 1054 1055 rxindex = rrpriv->cur_rx; 1056 if (rxindex != rxlimit) 1057 rx_int(dev, rxlimit, rxindex); 1058 1059 txcon = rrpriv->dirty_tx; 1060 if (txcsmr != txcon) { 1061 do { 1062 /* Due to occational firmware TX producer/consumer out 1063 * of sync. error need to check entry in ring -kbf 1064 */ 1065 if(rrpriv->tx_skbuff[txcon]){ 1066 struct tx_desc *desc; 1067 struct sk_buff *skb; 1068 1069 desc = &(rrpriv->tx_ring[txcon]); 1070 skb = rrpriv->tx_skbuff[txcon]; 1071 1072 dev->stats.tx_packets++; 1073 dev->stats.tx_bytes += skb->len; 1074 1075 dma_unmap_single(&rrpriv->pci_dev->dev, 1076 desc->addr.addrlo, skb->len, 1077 DMA_TO_DEVICE); 1078 dev_kfree_skb_irq(skb); 1079 1080 rrpriv->tx_skbuff[txcon] = NULL; 1081 desc->size = 0; 1082 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0); 1083 desc->mode = 0; 1084 } 1085 txcon = (txcon + 1) % TX_RING_ENTRIES; 1086 } while (txcsmr != txcon); 1087 wmb(); 1088 1089 rrpriv->dirty_tx = txcon; 1090 if (rrpriv->tx_full && rr_if_busy(dev) && 1091 (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES) 1092 != rrpriv->dirty_tx)){ 1093 rrpriv->tx_full = 0; 1094 netif_wake_queue(dev); 1095 } 1096 } 1097 1098 eidx |= ((txcsmr << 8) | (rxlimit << 16)); 1099 writel(eidx, ®s->EvtCon); 1100 wmb(); 1101 1102 spin_unlock(&rrpriv->lock); 1103 return IRQ_HANDLED; 1104} 1105 1106static inline void rr_raz_tx(struct rr_private *rrpriv, 1107 struct net_device *dev) 1108{ 1109 int i; 1110 1111 for (i = 0; i < TX_RING_ENTRIES; i++) { 1112 struct sk_buff *skb = rrpriv->tx_skbuff[i]; 1113 1114 if (skb) { 1115 struct tx_desc *desc = &(rrpriv->tx_ring[i]); 1116 1117 dma_unmap_single(&rrpriv->pci_dev->dev, 1118 desc->addr.addrlo, skb->len, 1119 DMA_TO_DEVICE); 1120 desc->size = 0; 1121 set_rraddr(&desc->addr, 0); 1122 dev_kfree_skb(skb); 1123 rrpriv->tx_skbuff[i] = NULL; 1124 } 1125 } 1126} 1127 1128 1129static inline void rr_raz_rx(struct rr_private *rrpriv, 1130 struct net_device *dev) 1131{ 1132 int i; 1133 1134 for (i = 0; i < RX_RING_ENTRIES; i++) { 1135 struct sk_buff *skb = rrpriv->rx_skbuff[i]; 1136 1137 if (skb) { 1138 struct rx_desc *desc = &(rrpriv->rx_ring[i]); 1139 1140 dma_unmap_single(&rrpriv->pci_dev->dev, 1141 desc->addr.addrlo, 1142 dev->mtu + HIPPI_HLEN, 1143 DMA_FROM_DEVICE); 1144 desc->size = 0; 1145 set_rraddr(&desc->addr, 0); 1146 dev_kfree_skb(skb); 1147 rrpriv->rx_skbuff[i] = NULL; 1148 } 1149 } 1150} 1151 1152static void rr_timer(struct timer_list *t) 1153{ 1154 struct rr_private *rrpriv = from_timer(rrpriv, t, timer); 1155 struct net_device *dev = pci_get_drvdata(rrpriv->pci_dev); 1156 struct rr_regs __iomem *regs = rrpriv->regs; 1157 unsigned long flags; 1158 1159 if (readl(®s->HostCtrl) & NIC_HALTED){ 1160 printk("%s: Restarting nic\n", dev->name); 1161 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl)); 1162 memset(rrpriv->info, 0, sizeof(struct rr_info)); 1163 wmb(); 1164 1165 rr_raz_tx(rrpriv, dev); 1166 rr_raz_rx(rrpriv, dev); 1167 1168 if (rr_init1(dev)) { 1169 spin_lock_irqsave(&rrpriv->lock, flags); 1170 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 1171 ®s->HostCtrl); 1172 spin_unlock_irqrestore(&rrpriv->lock, flags); 1173 } 1174 } 1175 rrpriv->timer.expires = RUN_AT(5*HZ); 1176 add_timer(&rrpriv->timer); 1177} 1178 1179 1180static int rr_open(struct net_device *dev) 1181{ 1182 struct rr_private *rrpriv = netdev_priv(dev); 1183 struct pci_dev *pdev = rrpriv->pci_dev; 1184 struct rr_regs __iomem *regs; 1185 int ecode = 0; 1186 unsigned long flags; 1187 dma_addr_t dma_addr; 1188 1189 regs = rrpriv->regs; 1190 1191 if (rrpriv->fw_rev < 0x00020000) { 1192 printk(KERN_WARNING "%s: trying to configure device with " 1193 "obsolete firmware\n", dev->name); 1194 ecode = -EBUSY; 1195 goto error; 1196 } 1197 1198 rrpriv->rx_ctrl = dma_alloc_coherent(&pdev->dev, 1199 256 * sizeof(struct ring_ctrl), 1200 &dma_addr, GFP_KERNEL); 1201 if (!rrpriv->rx_ctrl) { 1202 ecode = -ENOMEM; 1203 goto error; 1204 } 1205 rrpriv->rx_ctrl_dma = dma_addr; 1206 1207 rrpriv->info = dma_alloc_coherent(&pdev->dev, sizeof(struct rr_info), 1208 &dma_addr, GFP_KERNEL); 1209 if (!rrpriv->info) { 1210 ecode = -ENOMEM; 1211 goto error; 1212 } 1213 rrpriv->info_dma = dma_addr; 1214 wmb(); 1215 1216 spin_lock_irqsave(&rrpriv->lock, flags); 1217 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, ®s->HostCtrl); 1218 readl(®s->HostCtrl); 1219 spin_unlock_irqrestore(&rrpriv->lock, flags); 1220 1221 if (request_irq(pdev->irq, rr_interrupt, IRQF_SHARED, dev->name, dev)) { 1222 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n", 1223 dev->name, pdev->irq); 1224 ecode = -EAGAIN; 1225 goto error; 1226 } 1227 1228 if ((ecode = rr_init1(dev))) 1229 goto error; 1230 1231 /* Set the timer to switch to check for link beat and perhaps switch 1232 to an alternate media type. */ 1233 timer_setup(&rrpriv->timer, rr_timer, 0); 1234 rrpriv->timer.expires = RUN_AT(5*HZ); /* 5 sec. watchdog */ 1235 add_timer(&rrpriv->timer); 1236 1237 netif_start_queue(dev); 1238 1239 return ecode; 1240 1241 error: 1242 spin_lock_irqsave(&rrpriv->lock, flags); 1243 writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, ®s->HostCtrl); 1244 spin_unlock_irqrestore(&rrpriv->lock, flags); 1245 1246 if (rrpriv->info) { 1247 dma_free_coherent(&pdev->dev, sizeof(struct rr_info), 1248 rrpriv->info, rrpriv->info_dma); 1249 rrpriv->info = NULL; 1250 } 1251 if (rrpriv->rx_ctrl) { 1252 dma_free_coherent(&pdev->dev, 256 * sizeof(struct ring_ctrl), 1253 rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma); 1254 rrpriv->rx_ctrl = NULL; 1255 } 1256 1257 netif_stop_queue(dev); 1258 1259 return ecode; 1260} 1261 1262 1263static void rr_dump(struct net_device *dev) 1264{ 1265 struct rr_private *rrpriv; 1266 struct rr_regs __iomem *regs; 1267 u32 index, cons; 1268 short i; 1269 int len; 1270 1271 rrpriv = netdev_priv(dev); 1272 regs = rrpriv->regs; 1273 1274 printk("%s: dumping NIC TX rings\n", dev->name); 1275 1276 printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n", 1277 readl(®s->RxPrd), readl(®s->TxPrd), 1278 readl(®s->EvtPrd), readl(®s->TxPi), 1279 rrpriv->info->tx_ctrl.pi); 1280 1281 printk("Error code 0x%x\n", readl(®s->Fail1)); 1282 1283 index = (((readl(®s->EvtPrd) >> 8) & 0xff) - 1) % TX_RING_ENTRIES; 1284 cons = rrpriv->dirty_tx; 1285 printk("TX ring index %i, TX consumer %i\n", 1286 index, cons); 1287 1288 if (rrpriv->tx_skbuff[index]){ 1289 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len); 1290 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size); 1291 for (i = 0; i < len; i++){ 1292 if (!(i & 7)) 1293 printk("\n"); 1294 printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]); 1295 } 1296 printk("\n"); 1297 } 1298 1299 if (rrpriv->tx_skbuff[cons]){ 1300 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len); 1301 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len); 1302 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %p, truesize 0x%x\n", 1303 rrpriv->tx_ring[cons].mode, 1304 rrpriv->tx_ring[cons].size, 1305 (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo, 1306 rrpriv->tx_skbuff[cons]->data, 1307 (unsigned int)rrpriv->tx_skbuff[cons]->truesize); 1308 for (i = 0; i < len; i++){ 1309 if (!(i & 7)) 1310 printk("\n"); 1311 printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size); 1312 } 1313 printk("\n"); 1314 } 1315 1316 printk("dumping TX ring info:\n"); 1317 for (i = 0; i < TX_RING_ENTRIES; i++) 1318 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n", 1319 rrpriv->tx_ring[i].mode, 1320 rrpriv->tx_ring[i].size, 1321 (unsigned long long) rrpriv->tx_ring[i].addr.addrlo); 1322 1323} 1324 1325 1326static int rr_close(struct net_device *dev) 1327{ 1328 struct rr_private *rrpriv = netdev_priv(dev); 1329 struct rr_regs __iomem *regs = rrpriv->regs; 1330 struct pci_dev *pdev = rrpriv->pci_dev; 1331 unsigned long flags; 1332 u32 tmp; 1333 short i; 1334 1335 netif_stop_queue(dev); 1336 1337 1338 /* 1339 * Lock to make sure we are not cleaning up while another CPU 1340 * is handling interrupts. 1341 */ 1342 spin_lock_irqsave(&rrpriv->lock, flags); 1343 1344 tmp = readl(®s->HostCtrl); 1345 if (tmp & NIC_HALTED){ 1346 printk("%s: NIC already halted\n", dev->name); 1347 rr_dump(dev); 1348 }else{ 1349 tmp |= HALT_NIC | RR_CLEAR_INT; 1350 writel(tmp, ®s->HostCtrl); 1351 readl(®s->HostCtrl); 1352 } 1353 1354 rrpriv->fw_running = 0; 1355 1356 spin_unlock_irqrestore(&rrpriv->lock, flags); 1357 del_timer_sync(&rrpriv->timer); 1358 spin_lock_irqsave(&rrpriv->lock, flags); 1359 1360 writel(0, ®s->TxPi); 1361 writel(0, ®s->IpRxPi); 1362 1363 writel(0, ®s->EvtCon); 1364 writel(0, ®s->EvtPrd); 1365 1366 for (i = 0; i < CMD_RING_ENTRIES; i++) 1367 writel(0, ®s->CmdRing[i]); 1368 1369 rrpriv->info->tx_ctrl.entries = 0; 1370 rrpriv->info->cmd_ctrl.pi = 0; 1371 rrpriv->info->evt_ctrl.pi = 0; 1372 rrpriv->rx_ctrl[4].entries = 0; 1373 1374 rr_raz_tx(rrpriv, dev); 1375 rr_raz_rx(rrpriv, dev); 1376 1377 dma_free_coherent(&pdev->dev, 256 * sizeof(struct ring_ctrl), 1378 rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma); 1379 rrpriv->rx_ctrl = NULL; 1380 1381 dma_free_coherent(&pdev->dev, sizeof(struct rr_info), rrpriv->info, 1382 rrpriv->info_dma); 1383 rrpriv->info = NULL; 1384 1385 spin_unlock_irqrestore(&rrpriv->lock, flags); 1386 free_irq(pdev->irq, dev); 1387 1388 return 0; 1389} 1390 1391 1392static netdev_tx_t rr_start_xmit(struct sk_buff *skb, 1393 struct net_device *dev) 1394{ 1395 struct rr_private *rrpriv = netdev_priv(dev); 1396 struct rr_regs __iomem *regs = rrpriv->regs; 1397 struct hippi_cb *hcb = (struct hippi_cb *) skb->cb; 1398 struct ring_ctrl *txctrl; 1399 unsigned long flags; 1400 u32 index, len = skb->len; 1401 u32 *ifield; 1402 struct sk_buff *new_skb; 1403 1404 if (readl(®s->Mode) & FATAL_ERR) 1405 printk("error codes Fail1 %02x, Fail2 %02x\n", 1406 readl(®s->Fail1), readl(®s->Fail2)); 1407 1408 /* 1409 * We probably need to deal with tbusy here to prevent overruns. 1410 */ 1411 1412 if (skb_headroom(skb) < 8){ 1413 printk("incoming skb too small - reallocating\n"); 1414 if (!(new_skb = dev_alloc_skb(len + 8))) { 1415 dev_kfree_skb(skb); 1416 netif_wake_queue(dev); 1417 return NETDEV_TX_OK; 1418 } 1419 skb_reserve(new_skb, 8); 1420 skb_put(new_skb, len); 1421 skb_copy_from_linear_data(skb, new_skb->data, len); 1422 dev_kfree_skb(skb); 1423 skb = new_skb; 1424 } 1425 1426 ifield = skb_push(skb, 8); 1427 1428 ifield[0] = 0; 1429 ifield[1] = hcb->ifield; 1430 1431 /* 1432 * We don't need the lock before we are actually going to start 1433 * fiddling with the control blocks. 1434 */ 1435 spin_lock_irqsave(&rrpriv->lock, flags); 1436 1437 txctrl = &rrpriv->info->tx_ctrl; 1438 1439 index = txctrl->pi; 1440 1441 rrpriv->tx_skbuff[index] = skb; 1442 set_rraddr(&rrpriv->tx_ring[index].addr, 1443 dma_map_single(&rrpriv->pci_dev->dev, skb->data, len + 8, DMA_TO_DEVICE)); 1444 rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */ 1445 rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END; 1446 txctrl->pi = (index + 1) % TX_RING_ENTRIES; 1447 wmb(); 1448 writel(txctrl->pi, ®s->TxPi); 1449 1450 if (txctrl->pi == rrpriv->dirty_tx){ 1451 rrpriv->tx_full = 1; 1452 netif_stop_queue(dev); 1453 } 1454 1455 spin_unlock_irqrestore(&rrpriv->lock, flags); 1456 1457 return NETDEV_TX_OK; 1458} 1459 1460 1461/* 1462 * Read the firmware out of the EEPROM and put it into the SRAM 1463 * (or from user space - later) 1464 * 1465 * This operation requires the NIC to be halted and is performed with 1466 * interrupts disabled and with the spinlock hold. 1467 */ 1468static int rr_load_firmware(struct net_device *dev) 1469{ 1470 struct rr_private *rrpriv; 1471 struct rr_regs __iomem *regs; 1472 size_t eptr, segptr; 1473 int i, j; 1474 u32 localctrl, sptr, len, tmp; 1475 u32 p2len, p2size, nr_seg, revision, io, sram_size; 1476 1477 rrpriv = netdev_priv(dev); 1478 regs = rrpriv->regs; 1479 1480 if (dev->flags & IFF_UP) 1481 return -EBUSY; 1482 1483 if (!(readl(®s->HostCtrl) & NIC_HALTED)){ 1484 printk("%s: Trying to load firmware to a running NIC.\n", 1485 dev->name); 1486 return -EBUSY; 1487 } 1488 1489 localctrl = readl(®s->LocalCtrl); 1490 writel(0, ®s->LocalCtrl); 1491 1492 writel(0, ®s->EvtPrd); 1493 writel(0, ®s->RxPrd); 1494 writel(0, ®s->TxPrd); 1495 1496 /* 1497 * First wipe the entire SRAM, otherwise we might run into all 1498 * kinds of trouble ... sigh, this took almost all afternoon 1499 * to track down ;-( 1500 */ 1501 io = readl(®s->ExtIo); 1502 writel(0, ®s->ExtIo); 1503 sram_size = rr_read_eeprom_word(rrpriv, 8); 1504 1505 for (i = 200; i < sram_size / 4; i++){ 1506 writel(i * 4, ®s->WinBase); 1507 mb(); 1508 writel(0, ®s->WinData); 1509 mb(); 1510 } 1511 writel(io, ®s->ExtIo); 1512 mb(); 1513 1514 eptr = rr_read_eeprom_word(rrpriv, 1515 offsetof(struct eeprom, rncd_info.AddrRunCodeSegs)); 1516 eptr = ((eptr & 0x1fffff) >> 3); 1517 1518 p2len = rr_read_eeprom_word(rrpriv, 0x83*4); 1519 p2len = (p2len << 2); 1520 p2size = rr_read_eeprom_word(rrpriv, 0x84*4); 1521 p2size = ((p2size & 0x1fffff) >> 3); 1522 1523 if ((eptr < p2size) || (eptr > (p2size + p2len))){ 1524 printk("%s: eptr is invalid\n", dev->name); 1525 goto out; 1526 } 1527 1528 revision = rr_read_eeprom_word(rrpriv, 1529 offsetof(struct eeprom, manf.HeaderFmt)); 1530 1531 if (revision != 1){ 1532 printk("%s: invalid firmware format (%i)\n", 1533 dev->name, revision); 1534 goto out; 1535 } 1536 1537 nr_seg = rr_read_eeprom_word(rrpriv, eptr); 1538 eptr +=4; 1539#if (DEBUG > 1) 1540 printk("%s: nr_seg %i\n", dev->name, nr_seg); 1541#endif 1542 1543 for (i = 0; i < nr_seg; i++){ 1544 sptr = rr_read_eeprom_word(rrpriv, eptr); 1545 eptr += 4; 1546 len = rr_read_eeprom_word(rrpriv, eptr); 1547 eptr += 4; 1548 segptr = rr_read_eeprom_word(rrpriv, eptr); 1549 segptr = ((segptr & 0x1fffff) >> 3); 1550 eptr += 4; 1551#if (DEBUG > 1) 1552 printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n", 1553 dev->name, i, sptr, len, segptr); 1554#endif 1555 for (j = 0; j < len; j++){ 1556 tmp = rr_read_eeprom_word(rrpriv, segptr); 1557 writel(sptr, ®s->WinBase); 1558 mb(); 1559 writel(tmp, ®s->WinData); 1560 mb(); 1561 segptr += 4; 1562 sptr += 4; 1563 } 1564 } 1565 1566out: 1567 writel(localctrl, ®s->LocalCtrl); 1568 mb(); 1569 return 0; 1570} 1571 1572 1573static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 1574{ 1575 struct rr_private *rrpriv; 1576 unsigned char *image, *oldimage; 1577 unsigned long flags; 1578 unsigned int i; 1579 int error = -EOPNOTSUPP; 1580 1581 rrpriv = netdev_priv(dev); 1582 1583 switch(cmd){ 1584 case SIOCRRGFW: 1585 if (!capable(CAP_SYS_RAWIO)){ 1586 return -EPERM; 1587 } 1588 1589 image = kmalloc_array(EEPROM_WORDS, sizeof(u32), GFP_KERNEL); 1590 if (!image) 1591 return -ENOMEM; 1592 1593 if (rrpriv->fw_running){ 1594 printk("%s: Firmware already running\n", dev->name); 1595 error = -EPERM; 1596 goto gf_out; 1597 } 1598 1599 spin_lock_irqsave(&rrpriv->lock, flags); 1600 i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES); 1601 spin_unlock_irqrestore(&rrpriv->lock, flags); 1602 if (i != EEPROM_BYTES){ 1603 printk(KERN_ERR "%s: Error reading EEPROM\n", 1604 dev->name); 1605 error = -EFAULT; 1606 goto gf_out; 1607 } 1608 error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES); 1609 if (error) 1610 error = -EFAULT; 1611 gf_out: 1612 kfree(image); 1613 return error; 1614 1615 case SIOCRRPFW: 1616 if (!capable(CAP_SYS_RAWIO)){ 1617 return -EPERM; 1618 } 1619 1620 image = memdup_user(rq->ifr_data, EEPROM_BYTES); 1621 if (IS_ERR(image)) 1622 return PTR_ERR(image); 1623 1624 oldimage = kmalloc(EEPROM_BYTES, GFP_KERNEL); 1625 if (!oldimage) { 1626 kfree(image); 1627 return -ENOMEM; 1628 } 1629 1630 if (rrpriv->fw_running){ 1631 printk("%s: Firmware already running\n", dev->name); 1632 error = -EPERM; 1633 goto wf_out; 1634 } 1635 1636 printk("%s: Updating EEPROM firmware\n", dev->name); 1637 1638 spin_lock_irqsave(&rrpriv->lock, flags); 1639 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES); 1640 if (error) 1641 printk(KERN_ERR "%s: Error writing EEPROM\n", 1642 dev->name); 1643 1644 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES); 1645 spin_unlock_irqrestore(&rrpriv->lock, flags); 1646 1647 if (i != EEPROM_BYTES) 1648 printk(KERN_ERR "%s: Error reading back EEPROM " 1649 "image\n", dev->name); 1650 1651 error = memcmp(image, oldimage, EEPROM_BYTES); 1652 if (error){ 1653 printk(KERN_ERR "%s: Error verifying EEPROM image\n", 1654 dev->name); 1655 error = -EFAULT; 1656 } 1657 wf_out: 1658 kfree(oldimage); 1659 kfree(image); 1660 return error; 1661 1662 case SIOCRRID: 1663 return put_user(0x52523032, (int __user *)rq->ifr_data); 1664 default: 1665 return error; 1666 } 1667} 1668 1669static const struct pci_device_id rr_pci_tbl[] = { 1670 { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER, 1671 PCI_ANY_ID, PCI_ANY_ID, }, 1672 { 0,} 1673}; 1674MODULE_DEVICE_TABLE(pci, rr_pci_tbl); 1675 1676static struct pci_driver rr_driver = { 1677 .name = "rrunner", 1678 .id_table = rr_pci_tbl, 1679 .probe = rr_init_one, 1680 .remove = rr_remove_one, 1681}; 1682 1683module_pci_driver(rr_driver); 1684