1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * File Name: 4 * skfddi.c 5 * 6 * Copyright Information: 7 * Copyright SysKonnect 1998,1999. 8 * 9 * The information in this file is provided "AS IS" without warranty. 10 * 11 * Abstract: 12 * A Linux device driver supporting the SysKonnect FDDI PCI controller 13 * familie. 14 * 15 * Maintainers: 16 * CG Christoph Goos (cgoos@syskonnect.de) 17 * 18 * Contributors: 19 * DM David S. Miller 20 * 21 * Address all question to: 22 * linux@syskonnect.de 23 * 24 * The technical manual for the adapters is available from SysKonnect's 25 * web pages: www.syskonnect.com 26 * Goto "Support" and search Knowledge Base for "manual". 27 * 28 * Driver Architecture: 29 * The driver architecture is based on the DEC FDDI driver by 30 * Lawrence V. Stefani and several ethernet drivers. 31 * I also used an existing Windows NT miniport driver. 32 * All hardware dependent functions are handled by the SysKonnect 33 * Hardware Module. 34 * The only headerfiles that are directly related to this source 35 * are skfddi.c, h/types.h, h/osdef1st.h, h/targetos.h. 36 * The others belong to the SysKonnect FDDI Hardware Module and 37 * should better not be changed. 38 * 39 * Modification History: 40 * Date Name Description 41 * 02-Mar-98 CG Created. 42 * 43 * 10-Mar-99 CG Support for 2.2.x added. 44 * 25-Mar-99 CG Corrected IRQ routing for SMP (APIC) 45 * 26-Oct-99 CG Fixed compilation error on 2.2.13 46 * 12-Nov-99 CG Source code release 47 * 22-Nov-99 CG Included in kernel source. 48 * 07-May-00 DM 64 bit fixes, new dma interface 49 * 31-Jul-03 DB Audit copy_*_user in skfp_ioctl 50 * Daniele Bellucci <bellucda@tiscali.it> 51 * 03-Dec-03 SH Convert to PCI device model 52 * 53 * Compilation options (-Dxxx): 54 * DRIVERDEBUG print lots of messages to log file 55 * DUMPPACKETS print received/transmitted packets to logfile 56 * 57 * Tested cpu architectures: 58 * - i386 59 * - sparc64 60 */ 61 62 /* Version information string - should be updated prior to */ 63 /* each new release!!! */ 64 #define VERSION "2.07" 65 66 static const char * const boot_msg = 67 "SysKonnect FDDI PCI Adapter driver v" VERSION " for\n" 68 " SK-55xx/SK-58xx adapters (SK-NET FDDI-FP/UP/LP)"; 69 70 /* Include files */ 71 72 #include <linux/capability.h> 73 #include <linux/compat.h> 74 #include <linux/module.h> 75 #include <linux/kernel.h> 76 #include <linux/errno.h> 77 #include <linux/ioport.h> 78 #include <linux/interrupt.h> 79 #include <linux/pci.h> 80 #include <linux/netdevice.h> 81 #include <linux/etherdevice.h> 82 #include <linux/fddidevice.h> 83 #include <linux/skbuff.h> 84 #include <linux/bitops.h> 85 #include <linux/gfp.h> 86 87 #include <asm/byteorder.h> 88 #include <asm/io.h> 89 #include <linux/uaccess.h> 90 91 #include "h/types.h" 92 #undef ADDR // undo Linux definition 93 #include "h/skfbi.h" 94 #include "h/fddi.h" 95 #include "h/smc.h" 96 #include "h/smtstate.h" 97 98 99 // Define module-wide (static) routines 100 static int skfp_driver_init(struct net_device *dev); 101 static int skfp_open(struct net_device *dev); 102 static int skfp_close(struct net_device *dev); 103 static irqreturn_t skfp_interrupt(int irq, void *dev_id); 104 static struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev); 105 static void skfp_ctl_set_multicast_list(struct net_device *dev); 106 static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev); 107 static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr); 108 static int skfp_siocdevprivate(struct net_device *dev, struct ifreq *rq, 109 void __user *data, int cmd); 110 static netdev_tx_t skfp_send_pkt(struct sk_buff *skb, 111 struct net_device *dev); 112 static void send_queued_packets(struct s_smc *smc); 113 static void CheckSourceAddress(unsigned char *frame, unsigned char *hw_addr); 114 static void ResetAdapter(struct s_smc *smc); 115 116 117 // Functions needed by the hardware module 118 void *mac_drv_get_space(struct s_smc *smc, u_int size); 119 void *mac_drv_get_desc_mem(struct s_smc *smc, u_int size); 120 unsigned long mac_drv_virt2phys(struct s_smc *smc, void *virt); 121 unsigned long dma_master(struct s_smc *smc, void *virt, int len, int flag); 122 void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr, 123 int flag); 124 void mac_drv_tx_complete(struct s_smc *smc, volatile struct s_smt_fp_txd *txd); 125 void llc_restart_tx(struct s_smc *smc); 126 void mac_drv_rx_complete(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd, 127 int frag_count, int len); 128 void mac_drv_requeue_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd, 129 int frag_count); 130 void mac_drv_fill_rxd(struct s_smc *smc); 131 void mac_drv_clear_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd, 132 int frag_count); 133 int mac_drv_rx_init(struct s_smc *smc, int len, int fc, char *look_ahead, 134 int la_len); 135 void dump_data(unsigned char *Data, int length); 136 137 // External functions from the hardware module 138 extern u_int mac_drv_check_space(void); 139 extern int mac_drv_init(struct s_smc *smc); 140 extern void hwm_tx_frag(struct s_smc *smc, char far * virt, u_long phys, 141 int len, int frame_status); 142 extern int hwm_tx_init(struct s_smc *smc, u_char fc, int frag_count, 143 int frame_len, int frame_status); 144 extern void fddi_isr(struct s_smc *smc); 145 extern void hwm_rx_frag(struct s_smc *smc, char far * virt, u_long phys, 146 int len, int frame_status); 147 extern void mac_drv_rx_mode(struct s_smc *smc, int mode); 148 extern void mac_drv_clear_rx_queue(struct s_smc *smc); 149 extern void enable_tx_irq(struct s_smc *smc, u_short queue); 150 151 static const struct pci_device_id skfddi_pci_tbl[] = { 152 { PCI_VENDOR_ID_SK, PCI_DEVICE_ID_SK_FP, PCI_ANY_ID, PCI_ANY_ID, }, 153 { } /* Terminating entry */ 154 }; 155 MODULE_DEVICE_TABLE(pci, skfddi_pci_tbl); 156 MODULE_DESCRIPTION("SysKonnect FDDI PCI driver"); 157 MODULE_LICENSE("GPL"); 158 MODULE_AUTHOR("Mirko Lindner <mlindner@syskonnect.de>"); 159 160 // Define module-wide (static) variables 161 162 static int num_boards; /* total number of adapters configured */ 163 164 static const struct net_device_ops skfp_netdev_ops = { 165 .ndo_open = skfp_open, 166 .ndo_stop = skfp_close, 167 .ndo_start_xmit = skfp_send_pkt, 168 .ndo_get_stats = skfp_ctl_get_stats, 169 .ndo_set_rx_mode = skfp_ctl_set_multicast_list, 170 .ndo_set_mac_address = skfp_ctl_set_mac_address, 171 .ndo_siocdevprivate = skfp_siocdevprivate, 172 }; 173 174 /* 175 * ================= 176 * = skfp_init_one = 177 * ================= 178 * 179 * Overview: 180 * Probes for supported FDDI PCI controllers 181 * 182 * Returns: 183 * Condition code 184 * 185 * Arguments: 186 * pdev - pointer to PCI device information 187 * 188 * Functional Description: 189 * This is now called by PCI driver registration process 190 * for each board found. 191 * 192 * Return Codes: 193 * 0 - This device (fddi0, fddi1, etc) configured successfully 194 * -ENODEV - No devices present, or no SysKonnect FDDI PCI device 195 * present for this device name 196 * 197 * 198 * Side Effects: 199 * Device structures for FDDI adapters (fddi0, fddi1, etc) are 200 * initialized and the board resources are read and stored in 201 * the device structure. 202 */ skfp_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)203 static int skfp_init_one(struct pci_dev *pdev, 204 const struct pci_device_id *ent) 205 { 206 struct net_device *dev; 207 struct s_smc *smc; /* board pointer */ 208 void __iomem *mem; 209 int err; 210 211 pr_debug("entering skfp_init_one\n"); 212 213 if (num_boards == 0) 214 printk("%s\n", boot_msg); 215 216 err = pci_enable_device(pdev); 217 if (err) 218 return err; 219 220 err = pci_request_regions(pdev, "skfddi"); 221 if (err) 222 goto err_out1; 223 224 pci_set_master(pdev); 225 226 #ifdef MEM_MAPPED_IO 227 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 228 printk(KERN_ERR "skfp: region is not an MMIO resource\n"); 229 err = -EIO; 230 goto err_out2; 231 } 232 233 mem = ioremap(pci_resource_start(pdev, 0), 0x4000); 234 #else 235 if (!(pci_resource_flags(pdev, 1) & IO_RESOURCE_IO)) { 236 printk(KERN_ERR "skfp: region is not PIO resource\n"); 237 err = -EIO; 238 goto err_out2; 239 } 240 241 mem = ioport_map(pci_resource_start(pdev, 1), FP_IO_LEN); 242 #endif 243 if (!mem) { 244 printk(KERN_ERR "skfp: Unable to map register, " 245 "FDDI adapter will be disabled.\n"); 246 err = -EIO; 247 goto err_out2; 248 } 249 250 dev = alloc_fddidev(sizeof(struct s_smc)); 251 if (!dev) { 252 printk(KERN_ERR "skfp: Unable to allocate fddi device, " 253 "FDDI adapter will be disabled.\n"); 254 err = -ENOMEM; 255 goto err_out3; 256 } 257 258 dev->irq = pdev->irq; 259 dev->netdev_ops = &skfp_netdev_ops; 260 261 SET_NETDEV_DEV(dev, &pdev->dev); 262 263 /* Initialize board structure with bus-specific info */ 264 smc = netdev_priv(dev); 265 smc->os.dev = dev; 266 smc->os.bus_type = SK_BUS_TYPE_PCI; 267 smc->os.pdev = *pdev; 268 smc->os.QueueSkb = MAX_TX_QUEUE_LEN; 269 smc->os.MaxFrameSize = MAX_FRAME_SIZE; 270 smc->os.dev = dev; 271 smc->hw.slot = -1; 272 smc->hw.iop = mem; 273 smc->os.ResetRequested = FALSE; 274 skb_queue_head_init(&smc->os.SendSkbQueue); 275 276 dev->base_addr = (unsigned long)mem; 277 278 err = skfp_driver_init(dev); 279 if (err) 280 goto err_out4; 281 282 err = register_netdev(dev); 283 if (err) 284 goto err_out5; 285 286 ++num_boards; 287 pci_set_drvdata(pdev, dev); 288 289 if ((pdev->subsystem_device & 0xff00) == 0x5500 || 290 (pdev->subsystem_device & 0xff00) == 0x5800) 291 printk("%s: SysKonnect FDDI PCI adapter" 292 " found (SK-%04X)\n", dev->name, 293 pdev->subsystem_device); 294 else 295 printk("%s: FDDI PCI adapter found\n", dev->name); 296 297 return 0; 298 err_out5: 299 if (smc->os.SharedMemAddr) 300 dma_free_coherent(&pdev->dev, smc->os.SharedMemSize, 301 smc->os.SharedMemAddr, 302 smc->os.SharedMemDMA); 303 dma_free_coherent(&pdev->dev, MAX_FRAME_SIZE, 304 smc->os.LocalRxBuffer, smc->os.LocalRxBufferDMA); 305 err_out4: 306 free_netdev(dev); 307 err_out3: 308 #ifdef MEM_MAPPED_IO 309 iounmap(mem); 310 #else 311 ioport_unmap(mem); 312 #endif 313 err_out2: 314 pci_release_regions(pdev); 315 err_out1: 316 pci_disable_device(pdev); 317 return err; 318 } 319 320 /* 321 * Called for each adapter board from pci_unregister_driver 322 */ skfp_remove_one(struct pci_dev * pdev)323 static void skfp_remove_one(struct pci_dev *pdev) 324 { 325 struct net_device *p = pci_get_drvdata(pdev); 326 struct s_smc *lp = netdev_priv(p); 327 328 unregister_netdev(p); 329 330 if (lp->os.SharedMemAddr) { 331 dma_free_coherent(&pdev->dev, 332 lp->os.SharedMemSize, 333 lp->os.SharedMemAddr, 334 lp->os.SharedMemDMA); 335 lp->os.SharedMemAddr = NULL; 336 } 337 if (lp->os.LocalRxBuffer) { 338 dma_free_coherent(&pdev->dev, 339 MAX_FRAME_SIZE, 340 lp->os.LocalRxBuffer, 341 lp->os.LocalRxBufferDMA); 342 lp->os.LocalRxBuffer = NULL; 343 } 344 #ifdef MEM_MAPPED_IO 345 iounmap(lp->hw.iop); 346 #else 347 ioport_unmap(lp->hw.iop); 348 #endif 349 pci_release_regions(pdev); 350 free_netdev(p); 351 352 pci_disable_device(pdev); 353 } 354 355 /* 356 * ==================== 357 * = skfp_driver_init = 358 * ==================== 359 * 360 * Overview: 361 * Initializes remaining adapter board structure information 362 * and makes sure adapter is in a safe state prior to skfp_open(). 363 * 364 * Returns: 365 * Condition code 366 * 367 * Arguments: 368 * dev - pointer to device information 369 * 370 * Functional Description: 371 * This function allocates additional resources such as the host memory 372 * blocks needed by the adapter. 373 * The adapter is also reset. The OS must call skfp_open() to open 374 * the adapter and bring it on-line. 375 * 376 * Return Codes: 377 * 0 - initialization succeeded 378 * -1 - initialization failed 379 */ skfp_driver_init(struct net_device * dev)380 static int skfp_driver_init(struct net_device *dev) 381 { 382 struct s_smc *smc = netdev_priv(dev); 383 skfddi_priv *bp = &smc->os; 384 int err = -EIO; 385 386 pr_debug("entering skfp_driver_init\n"); 387 388 // set the io address in private structures 389 bp->base_addr = dev->base_addr; 390 391 // Get the interrupt level from the PCI Configuration Table 392 smc->hw.irq = dev->irq; 393 394 spin_lock_init(&bp->DriverLock); 395 396 // Allocate invalid frame 397 bp->LocalRxBuffer = dma_alloc_coherent(&bp->pdev.dev, MAX_FRAME_SIZE, 398 &bp->LocalRxBufferDMA, 399 GFP_ATOMIC); 400 if (!bp->LocalRxBuffer) { 401 printk("could not allocate mem for "); 402 printk("LocalRxBuffer: %d byte\n", MAX_FRAME_SIZE); 403 goto fail; 404 } 405 406 // Determine the required size of the 'shared' memory area. 407 bp->SharedMemSize = mac_drv_check_space(); 408 pr_debug("Memory for HWM: %ld\n", bp->SharedMemSize); 409 if (bp->SharedMemSize > 0) { 410 bp->SharedMemSize += 16; // for descriptor alignment 411 412 bp->SharedMemAddr = dma_alloc_coherent(&bp->pdev.dev, 413 bp->SharedMemSize, 414 &bp->SharedMemDMA, 415 GFP_ATOMIC); 416 if (!bp->SharedMemAddr) { 417 printk("could not allocate mem for "); 418 printk("hardware module: %ld byte\n", 419 bp->SharedMemSize); 420 goto fail; 421 } 422 423 } else { 424 bp->SharedMemAddr = NULL; 425 } 426 427 bp->SharedMemHeap = 0; 428 429 card_stop(smc); // Reset adapter. 430 431 pr_debug("mac_drv_init()..\n"); 432 if (mac_drv_init(smc) != 0) { 433 pr_debug("mac_drv_init() failed\n"); 434 goto fail; 435 } 436 read_address(smc, NULL); 437 pr_debug("HW-Addr: %pMF\n", smc->hw.fddi_canon_addr.a); 438 eth_hw_addr_set(dev, smc->hw.fddi_canon_addr.a); 439 440 smt_reset_defaults(smc, 0); 441 442 return 0; 443 444 fail: 445 if (bp->SharedMemAddr) { 446 dma_free_coherent(&bp->pdev.dev, 447 bp->SharedMemSize, 448 bp->SharedMemAddr, 449 bp->SharedMemDMA); 450 bp->SharedMemAddr = NULL; 451 } 452 if (bp->LocalRxBuffer) { 453 dma_free_coherent(&bp->pdev.dev, MAX_FRAME_SIZE, 454 bp->LocalRxBuffer, bp->LocalRxBufferDMA); 455 bp->LocalRxBuffer = NULL; 456 } 457 return err; 458 } // skfp_driver_init 459 460 461 /* 462 * ============= 463 * = skfp_open = 464 * ============= 465 * 466 * Overview: 467 * Opens the adapter 468 * 469 * Returns: 470 * Condition code 471 * 472 * Arguments: 473 * dev - pointer to device information 474 * 475 * Functional Description: 476 * This function brings the adapter to an operational state. 477 * 478 * Return Codes: 479 * 0 - Adapter was successfully opened 480 * -EAGAIN - Could not register IRQ 481 */ skfp_open(struct net_device * dev)482 static int skfp_open(struct net_device *dev) 483 { 484 struct s_smc *smc = netdev_priv(dev); 485 int err; 486 487 pr_debug("entering skfp_open\n"); 488 /* Register IRQ - support shared interrupts by passing device ptr */ 489 err = request_irq(dev->irq, skfp_interrupt, IRQF_SHARED, 490 dev->name, dev); 491 if (err) 492 return err; 493 494 /* 495 * Set current address to factory MAC address 496 * 497 * Note: We've already done this step in skfp_driver_init. 498 * However, it's possible that a user has set a node 499 * address override, then closed and reopened the 500 * adapter. Unless we reset the device address field 501 * now, we'll continue to use the existing modified 502 * address. 503 */ 504 read_address(smc, NULL); 505 eth_hw_addr_set(dev, smc->hw.fddi_canon_addr.a); 506 507 init_smt(smc, NULL); 508 smt_online(smc, 1); 509 STI_FBI(); 510 511 /* Clear local multicast address tables */ 512 mac_clear_multicast(smc); 513 514 /* Disable promiscuous filter settings */ 515 mac_drv_rx_mode(smc, RX_DISABLE_PROMISC); 516 517 netif_start_queue(dev); 518 return 0; 519 } // skfp_open 520 521 522 /* 523 * ============== 524 * = skfp_close = 525 * ============== 526 * 527 * Overview: 528 * Closes the device/module. 529 * 530 * Returns: 531 * Condition code 532 * 533 * Arguments: 534 * dev - pointer to device information 535 * 536 * Functional Description: 537 * This routine closes the adapter and brings it to a safe state. 538 * The interrupt service routine is deregistered with the OS. 539 * The adapter can be opened again with another call to skfp_open(). 540 * 541 * Return Codes: 542 * Always return 0. 543 * 544 * Assumptions: 545 * No further requests for this adapter are made after this routine is 546 * called. skfp_open() can be called to reset and reinitialize the 547 * adapter. 548 */ skfp_close(struct net_device * dev)549 static int skfp_close(struct net_device *dev) 550 { 551 struct s_smc *smc = netdev_priv(dev); 552 skfddi_priv *bp = &smc->os; 553 554 CLI_FBI(); 555 smt_reset_defaults(smc, 1); 556 card_stop(smc); 557 mac_drv_clear_tx_queue(smc); 558 mac_drv_clear_rx_queue(smc); 559 560 netif_stop_queue(dev); 561 /* Deregister (free) IRQ */ 562 free_irq(dev->irq, dev); 563 564 skb_queue_purge(&bp->SendSkbQueue); 565 bp->QueueSkb = MAX_TX_QUEUE_LEN; 566 567 return 0; 568 } // skfp_close 569 570 571 /* 572 * ================== 573 * = skfp_interrupt = 574 * ================== 575 * 576 * Overview: 577 * Interrupt processing routine 578 * 579 * Returns: 580 * None 581 * 582 * Arguments: 583 * irq - interrupt vector 584 * dev_id - pointer to device information 585 * 586 * Functional Description: 587 * This routine calls the interrupt processing routine for this adapter. It 588 * disables and reenables adapter interrupts, as appropriate. We can support 589 * shared interrupts since the incoming dev_id pointer provides our device 590 * structure context. All the real work is done in the hardware module. 591 * 592 * Return Codes: 593 * None 594 * 595 * Assumptions: 596 * The interrupt acknowledgement at the hardware level (eg. ACKing the PIC 597 * on Intel-based systems) is done by the operating system outside this 598 * routine. 599 * 600 * System interrupts are enabled through this call. 601 * 602 * Side Effects: 603 * Interrupts are disabled, then reenabled at the adapter. 604 */ 605 skfp_interrupt(int irq,void * dev_id)606 static irqreturn_t skfp_interrupt(int irq, void *dev_id) 607 { 608 struct net_device *dev = dev_id; 609 struct s_smc *smc; /* private board structure pointer */ 610 skfddi_priv *bp; 611 612 smc = netdev_priv(dev); 613 bp = &smc->os; 614 615 // IRQs enabled or disabled ? 616 if (inpd(ADDR(B0_IMSK)) == 0) { 617 // IRQs are disabled: must be shared interrupt 618 return IRQ_NONE; 619 } 620 // Note: At this point, IRQs are enabled. 621 if ((inpd(ISR_A) & smc->hw.is_imask) == 0) { // IRQ? 622 // Adapter did not issue an IRQ: must be shared interrupt 623 return IRQ_NONE; 624 } 625 CLI_FBI(); // Disable IRQs from our adapter. 626 spin_lock(&bp->DriverLock); 627 628 // Call interrupt handler in hardware module (HWM). 629 fddi_isr(smc); 630 631 if (smc->os.ResetRequested) { 632 ResetAdapter(smc); 633 smc->os.ResetRequested = FALSE; 634 } 635 spin_unlock(&bp->DriverLock); 636 STI_FBI(); // Enable IRQs from our adapter. 637 638 return IRQ_HANDLED; 639 } // skfp_interrupt 640 641 642 /* 643 * ====================== 644 * = skfp_ctl_get_stats = 645 * ====================== 646 * 647 * Overview: 648 * Get statistics for FDDI adapter 649 * 650 * Returns: 651 * Pointer to FDDI statistics structure 652 * 653 * Arguments: 654 * dev - pointer to device information 655 * 656 * Functional Description: 657 * Gets current MIB objects from adapter, then 658 * returns FDDI statistics structure as defined 659 * in if_fddi.h. 660 * 661 * Note: Since the FDDI statistics structure is 662 * still new and the device structure doesn't 663 * have an FDDI-specific get statistics handler, 664 * we'll return the FDDI statistics structure as 665 * a pointer to an Ethernet statistics structure. 666 * That way, at least the first part of the statistics 667 * structure can be decoded properly. 668 * We'll have to pay attention to this routine as the 669 * device structure becomes more mature and LAN media 670 * independent. 671 * 672 */ skfp_ctl_get_stats(struct net_device * dev)673 static struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev) 674 { 675 struct s_smc *bp = netdev_priv(dev); 676 677 /* Fill the bp->stats structure with driver-maintained counters */ 678 679 bp->os.MacStat.port_bs_flag[0] = 0x1234; 680 bp->os.MacStat.port_bs_flag[1] = 0x5678; 681 // goos: need to fill out fddi statistic 682 #if 0 683 /* Get FDDI SMT MIB objects */ 684 685 /* Fill the bp->stats structure with the SMT MIB object values */ 686 687 memcpy(bp->stats.smt_station_id, &bp->cmd_rsp_virt->smt_mib_get.smt_station_id, sizeof(bp->cmd_rsp_virt->smt_mib_get.smt_station_id)); 688 bp->stats.smt_op_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_op_version_id; 689 bp->stats.smt_hi_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_hi_version_id; 690 bp->stats.smt_lo_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_lo_version_id; 691 memcpy(bp->stats.smt_user_data, &bp->cmd_rsp_virt->smt_mib_get.smt_user_data, sizeof(bp->cmd_rsp_virt->smt_mib_get.smt_user_data)); 692 bp->stats.smt_mib_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_mib_version_id; 693 bp->stats.smt_mac_cts = bp->cmd_rsp_virt->smt_mib_get.smt_mac_ct; 694 bp->stats.smt_non_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_non_master_ct; 695 bp->stats.smt_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_master_ct; 696 bp->stats.smt_available_paths = bp->cmd_rsp_virt->smt_mib_get.smt_available_paths; 697 bp->stats.smt_config_capabilities = bp->cmd_rsp_virt->smt_mib_get.smt_config_capabilities; 698 bp->stats.smt_config_policy = bp->cmd_rsp_virt->smt_mib_get.smt_config_policy; 699 bp->stats.smt_connection_policy = bp->cmd_rsp_virt->smt_mib_get.smt_connection_policy; 700 bp->stats.smt_t_notify = bp->cmd_rsp_virt->smt_mib_get.smt_t_notify; 701 bp->stats.smt_stat_rpt_policy = bp->cmd_rsp_virt->smt_mib_get.smt_stat_rpt_policy; 702 bp->stats.smt_trace_max_expiration = bp->cmd_rsp_virt->smt_mib_get.smt_trace_max_expiration; 703 bp->stats.smt_bypass_present = bp->cmd_rsp_virt->smt_mib_get.smt_bypass_present; 704 bp->stats.smt_ecm_state = bp->cmd_rsp_virt->smt_mib_get.smt_ecm_state; 705 bp->stats.smt_cf_state = bp->cmd_rsp_virt->smt_mib_get.smt_cf_state; 706 bp->stats.smt_remote_disconnect_flag = bp->cmd_rsp_virt->smt_mib_get.smt_remote_disconnect_flag; 707 bp->stats.smt_station_status = bp->cmd_rsp_virt->smt_mib_get.smt_station_status; 708 bp->stats.smt_peer_wrap_flag = bp->cmd_rsp_virt->smt_mib_get.smt_peer_wrap_flag; 709 bp->stats.smt_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_msg_time_stamp.ls; 710 bp->stats.smt_transition_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_transition_time_stamp.ls; 711 bp->stats.mac_frame_status_functions = bp->cmd_rsp_virt->smt_mib_get.mac_frame_status_functions; 712 bp->stats.mac_t_max_capability = bp->cmd_rsp_virt->smt_mib_get.mac_t_max_capability; 713 bp->stats.mac_tvx_capability = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_capability; 714 bp->stats.mac_available_paths = bp->cmd_rsp_virt->smt_mib_get.mac_available_paths; 715 bp->stats.mac_current_path = bp->cmd_rsp_virt->smt_mib_get.mac_current_path; 716 memcpy(bp->stats.mac_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_upstream_nbr, FDDI_K_ALEN); 717 memcpy(bp->stats.mac_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_downstream_nbr, FDDI_K_ALEN); 718 memcpy(bp->stats.mac_old_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_upstream_nbr, FDDI_K_ALEN); 719 memcpy(bp->stats.mac_old_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_downstream_nbr, FDDI_K_ALEN); 720 bp->stats.mac_dup_address_test = bp->cmd_rsp_virt->smt_mib_get.mac_dup_address_test; 721 bp->stats.mac_requested_paths = bp->cmd_rsp_virt->smt_mib_get.mac_requested_paths; 722 bp->stats.mac_downstream_port_type = bp->cmd_rsp_virt->smt_mib_get.mac_downstream_port_type; 723 memcpy(bp->stats.mac_smt_address, &bp->cmd_rsp_virt->smt_mib_get.mac_smt_address, FDDI_K_ALEN); 724 bp->stats.mac_t_req = bp->cmd_rsp_virt->smt_mib_get.mac_t_req; 725 bp->stats.mac_t_neg = bp->cmd_rsp_virt->smt_mib_get.mac_t_neg; 726 bp->stats.mac_t_max = bp->cmd_rsp_virt->smt_mib_get.mac_t_max; 727 bp->stats.mac_tvx_value = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_value; 728 bp->stats.mac_frame_error_threshold = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_threshold; 729 bp->stats.mac_frame_error_ratio = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_ratio; 730 bp->stats.mac_rmt_state = bp->cmd_rsp_virt->smt_mib_get.mac_rmt_state; 731 bp->stats.mac_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_da_flag; 732 bp->stats.mac_una_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_unda_flag; 733 bp->stats.mac_frame_error_flag = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_flag; 734 bp->stats.mac_ma_unitdata_available = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_available; 735 bp->stats.mac_hardware_present = bp->cmd_rsp_virt->smt_mib_get.mac_hardware_present; 736 bp->stats.mac_ma_unitdata_enable = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_enable; 737 bp->stats.path_tvx_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_tvx_lower_bound; 738 bp->stats.path_t_max_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_t_max_lower_bound; 739 bp->stats.path_max_t_req = bp->cmd_rsp_virt->smt_mib_get.path_max_t_req; 740 memcpy(bp->stats.path_configuration, &bp->cmd_rsp_virt->smt_mib_get.path_configuration, sizeof(bp->cmd_rsp_virt->smt_mib_get.path_configuration)); 741 bp->stats.port_my_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[0]; 742 bp->stats.port_my_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[1]; 743 bp->stats.port_neighbor_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[0]; 744 bp->stats.port_neighbor_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[1]; 745 bp->stats.port_connection_policies[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[0]; 746 bp->stats.port_connection_policies[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[1]; 747 bp->stats.port_mac_indicated[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[0]; 748 bp->stats.port_mac_indicated[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[1]; 749 bp->stats.port_current_path[0] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[0]; 750 bp->stats.port_current_path[1] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[1]; 751 memcpy(&bp->stats.port_requested_paths[0 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[0], 3); 752 memcpy(&bp->stats.port_requested_paths[1 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[1], 3); 753 bp->stats.port_mac_placement[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[0]; 754 bp->stats.port_mac_placement[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[1]; 755 bp->stats.port_available_paths[0] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[0]; 756 bp->stats.port_available_paths[1] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[1]; 757 bp->stats.port_pmd_class[0] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[0]; 758 bp->stats.port_pmd_class[1] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[1]; 759 bp->stats.port_connection_capabilities[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[0]; 760 bp->stats.port_connection_capabilities[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[1]; 761 bp->stats.port_bs_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[0]; 762 bp->stats.port_bs_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[1]; 763 bp->stats.port_ler_estimate[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[0]; 764 bp->stats.port_ler_estimate[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[1]; 765 bp->stats.port_ler_cutoff[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[0]; 766 bp->stats.port_ler_cutoff[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[1]; 767 bp->stats.port_ler_alarm[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[0]; 768 bp->stats.port_ler_alarm[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[1]; 769 bp->stats.port_connect_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[0]; 770 bp->stats.port_connect_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[1]; 771 bp->stats.port_pcm_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[0]; 772 bp->stats.port_pcm_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[1]; 773 bp->stats.port_pc_withhold[0] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[0]; 774 bp->stats.port_pc_withhold[1] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[1]; 775 bp->stats.port_ler_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[0]; 776 bp->stats.port_ler_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[1]; 777 bp->stats.port_hardware_present[0] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[0]; 778 bp->stats.port_hardware_present[1] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[1]; 779 780 781 /* Fill the bp->stats structure with the FDDI counter values */ 782 783 bp->stats.mac_frame_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.frame_cnt.ls; 784 bp->stats.mac_copied_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.copied_cnt.ls; 785 bp->stats.mac_transmit_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.transmit_cnt.ls; 786 bp->stats.mac_error_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.error_cnt.ls; 787 bp->stats.mac_lost_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.lost_cnt.ls; 788 bp->stats.port_lct_fail_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[0].ls; 789 bp->stats.port_lct_fail_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[1].ls; 790 bp->stats.port_lem_reject_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[0].ls; 791 bp->stats.port_lem_reject_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[1].ls; 792 bp->stats.port_lem_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[0].ls; 793 bp->stats.port_lem_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[1].ls; 794 795 #endif 796 return (struct net_device_stats *)&bp->os.MacStat; 797 } // ctl_get_stat 798 799 800 /* 801 * ============================== 802 * = skfp_ctl_set_multicast_list = 803 * ============================== 804 * 805 * Overview: 806 * Enable/Disable LLC frame promiscuous mode reception 807 * on the adapter and/or update multicast address table. 808 * 809 * Returns: 810 * None 811 * 812 * Arguments: 813 * dev - pointer to device information 814 * 815 * Functional Description: 816 * This function acquires the driver lock and only calls 817 * skfp_ctl_set_multicast_list_wo_lock then. 818 * This routine follows a fairly simple algorithm for setting the 819 * adapter filters and CAM: 820 * 821 * if IFF_PROMISC flag is set 822 * enable promiscuous mode 823 * else 824 * disable promiscuous mode 825 * if number of multicast addresses <= max. multicast number 826 * add mc addresses to adapter table 827 * else 828 * enable promiscuous mode 829 * update adapter filters 830 * 831 * Assumptions: 832 * Multicast addresses are presented in canonical (LSB) format. 833 * 834 * Side Effects: 835 * On-board adapter filters are updated. 836 */ skfp_ctl_set_multicast_list(struct net_device * dev)837 static void skfp_ctl_set_multicast_list(struct net_device *dev) 838 { 839 struct s_smc *smc = netdev_priv(dev); 840 skfddi_priv *bp = &smc->os; 841 unsigned long Flags; 842 843 spin_lock_irqsave(&bp->DriverLock, Flags); 844 skfp_ctl_set_multicast_list_wo_lock(dev); 845 spin_unlock_irqrestore(&bp->DriverLock, Flags); 846 } // skfp_ctl_set_multicast_list 847 848 849 skfp_ctl_set_multicast_list_wo_lock(struct net_device * dev)850 static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev) 851 { 852 struct s_smc *smc = netdev_priv(dev); 853 struct netdev_hw_addr *ha; 854 855 /* Enable promiscuous mode, if necessary */ 856 if (dev->flags & IFF_PROMISC) { 857 mac_drv_rx_mode(smc, RX_ENABLE_PROMISC); 858 pr_debug("PROMISCUOUS MODE ENABLED\n"); 859 } 860 /* Else, update multicast address table */ 861 else { 862 mac_drv_rx_mode(smc, RX_DISABLE_PROMISC); 863 pr_debug("PROMISCUOUS MODE DISABLED\n"); 864 865 // Reset all MC addresses 866 mac_clear_multicast(smc); 867 mac_drv_rx_mode(smc, RX_DISABLE_ALLMULTI); 868 869 if (dev->flags & IFF_ALLMULTI) { 870 mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI); 871 pr_debug("ENABLE ALL MC ADDRESSES\n"); 872 } else if (!netdev_mc_empty(dev)) { 873 if (netdev_mc_count(dev) <= FPMAX_MULTICAST) { 874 /* use exact filtering */ 875 876 // point to first multicast addr 877 netdev_for_each_mc_addr(ha, dev) { 878 mac_add_multicast(smc, 879 (struct fddi_addr *)ha->addr, 880 1); 881 882 pr_debug("ENABLE MC ADDRESS: %pMF\n", 883 ha->addr); 884 } 885 886 } else { // more MC addresses than HW supports 887 888 mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI); 889 pr_debug("ENABLE ALL MC ADDRESSES\n"); 890 } 891 } else { // no MC addresses 892 893 pr_debug("DISABLE ALL MC ADDRESSES\n"); 894 } 895 896 /* Update adapter filters */ 897 mac_update_multicast(smc); 898 } 899 } // skfp_ctl_set_multicast_list_wo_lock 900 901 902 /* 903 * =========================== 904 * = skfp_ctl_set_mac_address = 905 * =========================== 906 * 907 * Overview: 908 * set new mac address on adapter and update dev_addr field in device table. 909 * 910 * Returns: 911 * None 912 * 913 * Arguments: 914 * dev - pointer to device information 915 * addr - pointer to sockaddr structure containing unicast address to set 916 * 917 * Assumptions: 918 * The address pointed to by addr->sa_data is a valid unicast 919 * address and is presented in canonical (LSB) format. 920 */ skfp_ctl_set_mac_address(struct net_device * dev,void * addr)921 static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr) 922 { 923 struct s_smc *smc = netdev_priv(dev); 924 struct sockaddr *p_sockaddr = (struct sockaddr *) addr; 925 skfddi_priv *bp = &smc->os; 926 unsigned long Flags; 927 928 929 dev_addr_set(dev, p_sockaddr->sa_data); 930 spin_lock_irqsave(&bp->DriverLock, Flags); 931 ResetAdapter(smc); 932 spin_unlock_irqrestore(&bp->DriverLock, Flags); 933 934 return 0; /* always return zero */ 935 } // skfp_ctl_set_mac_address 936 937 938 /* 939 * ======================= 940 * = skfp_siocdevprivate = 941 * ======================= 942 * 943 * Overview: 944 * 945 * Perform IOCTL call functions here. Some are privileged operations and the 946 * effective uid is checked in those cases. 947 * 948 * Returns: 949 * status value 950 * 0 - success 951 * other - failure 952 * 953 * Arguments: 954 * dev - pointer to device information 955 * rq - pointer to ioctl request structure 956 * cmd - ? 957 * 958 */ 959 960 skfp_siocdevprivate(struct net_device * dev,struct ifreq * rq,void __user * data,int cmd)961 static int skfp_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd) 962 { 963 struct s_smc *smc = netdev_priv(dev); 964 skfddi_priv *lp = &smc->os; 965 struct s_skfp_ioctl ioc; 966 int status = 0; 967 968 if (copy_from_user(&ioc, data, sizeof(struct s_skfp_ioctl))) 969 return -EFAULT; 970 971 if (in_compat_syscall()) 972 return -EOPNOTSUPP; 973 974 switch (ioc.cmd) { 975 case SKFP_GET_STATS: /* Get the driver statistics */ 976 ioc.len = sizeof(lp->MacStat); 977 status = copy_to_user(ioc.data, skfp_ctl_get_stats(dev), ioc.len) 978 ? -EFAULT : 0; 979 break; 980 case SKFP_CLR_STATS: /* Zero out the driver statistics */ 981 if (!capable(CAP_NET_ADMIN)) { 982 status = -EPERM; 983 } else { 984 memset(&lp->MacStat, 0, sizeof(lp->MacStat)); 985 } 986 break; 987 default: 988 printk("ioctl for %s: unknown cmd: %04x\n", dev->name, ioc.cmd); 989 status = -EOPNOTSUPP; 990 991 } // switch 992 993 return status; 994 } // skfp_ioctl 995 996 997 /* 998 * ===================== 999 * = skfp_send_pkt = 1000 * ===================== 1001 * 1002 * Overview: 1003 * Queues a packet for transmission and try to transmit it. 1004 * 1005 * Returns: 1006 * Condition code 1007 * 1008 * Arguments: 1009 * skb - pointer to sk_buff to queue for transmission 1010 * dev - pointer to device information 1011 * 1012 * Functional Description: 1013 * Here we assume that an incoming skb transmit request 1014 * is contained in a single physically contiguous buffer 1015 * in which the virtual address of the start of packet 1016 * (skb->data) can be converted to a physical address 1017 * by using dma_map_single(). 1018 * 1019 * We have an internal queue for packets we can not send 1020 * immediately. Packets in this queue can be given to the 1021 * adapter if transmit buffers are freed. 1022 * 1023 * We can't free the skb until after it's been DMA'd 1024 * out by the adapter, so we'll keep it in the driver and 1025 * return it in mac_drv_tx_complete. 1026 * 1027 * Return Codes: 1028 * 0 - driver has queued and/or sent packet 1029 * 1 - caller should requeue the sk_buff for later transmission 1030 * 1031 * Assumptions: 1032 * The entire packet is stored in one physically 1033 * contiguous buffer which is not cached and whose 1034 * 32-bit physical address can be determined. 1035 * 1036 * It's vital that this routine is NOT reentered for the 1037 * same board and that the OS is not in another section of 1038 * code (eg. skfp_interrupt) for the same board on a 1039 * different thread. 1040 * 1041 * Side Effects: 1042 * None 1043 */ skfp_send_pkt(struct sk_buff * skb,struct net_device * dev)1044 static netdev_tx_t skfp_send_pkt(struct sk_buff *skb, 1045 struct net_device *dev) 1046 { 1047 struct s_smc *smc = netdev_priv(dev); 1048 skfddi_priv *bp = &smc->os; 1049 1050 pr_debug("skfp_send_pkt\n"); 1051 1052 /* 1053 * Verify that incoming transmit request is OK 1054 * 1055 * Note: The packet size check is consistent with other 1056 * Linux device drivers, although the correct packet 1057 * size should be verified before calling the 1058 * transmit routine. 1059 */ 1060 1061 if (!(skb->len >= FDDI_K_LLC_ZLEN && skb->len <= FDDI_K_LLC_LEN)) { 1062 bp->MacStat.gen.tx_errors++; /* bump error counter */ 1063 // dequeue packets from xmt queue and send them 1064 netif_start_queue(dev); 1065 dev_kfree_skb(skb); 1066 return NETDEV_TX_OK; /* return "success" */ 1067 } 1068 if (bp->QueueSkb == 0) { // return with tbusy set: queue full 1069 1070 netif_stop_queue(dev); 1071 return NETDEV_TX_BUSY; 1072 } 1073 bp->QueueSkb--; 1074 skb_queue_tail(&bp->SendSkbQueue, skb); 1075 send_queued_packets(netdev_priv(dev)); 1076 if (bp->QueueSkb == 0) { 1077 netif_stop_queue(dev); 1078 } 1079 return NETDEV_TX_OK; 1080 1081 } // skfp_send_pkt 1082 1083 1084 /* 1085 * ======================= 1086 * = send_queued_packets = 1087 * ======================= 1088 * 1089 * Overview: 1090 * Send packets from the driver queue as long as there are some and 1091 * transmit resources are available. 1092 * 1093 * Returns: 1094 * None 1095 * 1096 * Arguments: 1097 * smc - pointer to smc (adapter) structure 1098 * 1099 * Functional Description: 1100 * Take a packet from queue if there is any. If not, then we are done. 1101 * Check if there are resources to send the packet. If not, requeue it 1102 * and exit. 1103 * Set packet descriptor flags and give packet to adapter. 1104 * Check if any send resources can be freed (we do not use the 1105 * transmit complete interrupt). 1106 */ send_queued_packets(struct s_smc * smc)1107 static void send_queued_packets(struct s_smc *smc) 1108 { 1109 skfddi_priv *bp = &smc->os; 1110 struct sk_buff *skb; 1111 unsigned char fc; 1112 int queue; 1113 struct s_smt_fp_txd *txd; // Current TxD. 1114 dma_addr_t dma_address; 1115 unsigned long Flags; 1116 1117 int frame_status; // HWM tx frame status. 1118 1119 pr_debug("send queued packets\n"); 1120 for (;;) { 1121 // send first buffer from queue 1122 skb = skb_dequeue(&bp->SendSkbQueue); 1123 1124 if (!skb) { 1125 pr_debug("queue empty\n"); 1126 return; 1127 } // queue empty ! 1128 1129 spin_lock_irqsave(&bp->DriverLock, Flags); 1130 fc = skb->data[0]; 1131 queue = (fc & FC_SYNC_BIT) ? QUEUE_S : QUEUE_A0; 1132 #ifdef ESS 1133 // Check if the frame may/must be sent as a synchronous frame. 1134 1135 if ((fc & ~(FC_SYNC_BIT | FC_LLC_PRIOR)) == FC_ASYNC_LLC) { 1136 // It's an LLC frame. 1137 if (!smc->ess.sync_bw_available) 1138 fc &= ~FC_SYNC_BIT; // No bandwidth available. 1139 1140 else { // Bandwidth is available. 1141 1142 if (smc->mib.fddiESSSynchTxMode) { 1143 // Send as sync. frame. 1144 fc |= FC_SYNC_BIT; 1145 } 1146 } 1147 } 1148 #endif // ESS 1149 frame_status = hwm_tx_init(smc, fc, 1, skb->len, queue); 1150 1151 if ((frame_status & (LOC_TX | LAN_TX)) == 0) { 1152 // Unable to send the frame. 1153 1154 if ((frame_status & RING_DOWN) != 0) { 1155 // Ring is down. 1156 pr_debug("Tx attempt while ring down.\n"); 1157 } else if ((frame_status & OUT_OF_TXD) != 0) { 1158 pr_debug("%s: out of TXDs.\n", bp->dev->name); 1159 } else { 1160 pr_debug("%s: out of transmit resources", 1161 bp->dev->name); 1162 } 1163 1164 // Note: We will retry the operation as soon as 1165 // transmit resources become available. 1166 skb_queue_head(&bp->SendSkbQueue, skb); 1167 spin_unlock_irqrestore(&bp->DriverLock, Flags); 1168 return; // Packet has been queued. 1169 1170 } // if (unable to send frame) 1171 1172 bp->QueueSkb++; // one packet less in local queue 1173 1174 // source address in packet ? 1175 CheckSourceAddress(skb->data, smc->hw.fddi_canon_addr.a); 1176 1177 txd = (struct s_smt_fp_txd *) HWM_GET_CURR_TXD(smc, queue); 1178 1179 dma_address = dma_map_single(&(&bp->pdev)->dev, skb->data, 1180 skb->len, DMA_TO_DEVICE); 1181 if (frame_status & LAN_TX) { 1182 txd->txd_os.skb = skb; // save skb 1183 txd->txd_os.dma_addr = dma_address; // save dma mapping 1184 } 1185 hwm_tx_frag(smc, skb->data, dma_address, skb->len, 1186 frame_status | FIRST_FRAG | LAST_FRAG | EN_IRQ_EOF); 1187 1188 if (!(frame_status & LAN_TX)) { // local only frame 1189 dma_unmap_single(&(&bp->pdev)->dev, dma_address, 1190 skb->len, DMA_TO_DEVICE); 1191 dev_kfree_skb_irq(skb); 1192 } 1193 spin_unlock_irqrestore(&bp->DriverLock, Flags); 1194 } // for 1195 1196 return; // never reached 1197 1198 } // send_queued_packets 1199 1200 1201 /************************ 1202 * 1203 * CheckSourceAddress 1204 * 1205 * Verify if the source address is set. Insert it if necessary. 1206 * 1207 ************************/ CheckSourceAddress(unsigned char * frame,unsigned char * hw_addr)1208 static void CheckSourceAddress(unsigned char *frame, unsigned char *hw_addr) 1209 { 1210 unsigned char SRBit; 1211 1212 if ((((unsigned long) frame[1 + 6]) & ~0x01) != 0) // source routing bit 1213 1214 return; 1215 if ((unsigned short) frame[1 + 10] != 0) 1216 return; 1217 SRBit = frame[1 + 6] & 0x01; 1218 memcpy(&frame[1 + 6], hw_addr, ETH_ALEN); 1219 frame[8] |= SRBit; 1220 } // CheckSourceAddress 1221 1222 1223 /************************ 1224 * 1225 * ResetAdapter 1226 * 1227 * Reset the adapter and bring it back to operational mode. 1228 * Args 1229 * smc - A pointer to the SMT context struct. 1230 * Out 1231 * Nothing. 1232 * 1233 ************************/ ResetAdapter(struct s_smc * smc)1234 static void ResetAdapter(struct s_smc *smc) 1235 { 1236 1237 pr_debug("[fddi: ResetAdapter]\n"); 1238 1239 // Stop the adapter. 1240 1241 card_stop(smc); // Stop all activity. 1242 1243 // Clear the transmit and receive descriptor queues. 1244 mac_drv_clear_tx_queue(smc); 1245 mac_drv_clear_rx_queue(smc); 1246 1247 // Restart the adapter. 1248 1249 smt_reset_defaults(smc, 1); // Initialize the SMT module. 1250 1251 init_smt(smc, (smc->os.dev)->dev_addr); // Initialize the hardware. 1252 1253 smt_online(smc, 1); // Insert into the ring again. 1254 STI_FBI(); 1255 1256 // Restore original receive mode (multicasts, promiscuous, etc.). 1257 skfp_ctl_set_multicast_list_wo_lock(smc->os.dev); 1258 } // ResetAdapter 1259 1260 1261 //--------------- functions called by hardware module ---------------- 1262 1263 /************************ 1264 * 1265 * llc_restart_tx 1266 * 1267 * The hardware driver calls this routine when the transmit complete 1268 * interrupt bits (end of frame) for the synchronous or asynchronous 1269 * queue is set. 1270 * 1271 * NOTE The hardware driver calls this function also if no packets are queued. 1272 * The routine must be able to handle this case. 1273 * Args 1274 * smc - A pointer to the SMT context struct. 1275 * Out 1276 * Nothing. 1277 * 1278 ************************/ llc_restart_tx(struct s_smc * smc)1279 void llc_restart_tx(struct s_smc *smc) 1280 { 1281 skfddi_priv *bp = &smc->os; 1282 1283 pr_debug("[llc_restart_tx]\n"); 1284 1285 // Try to send queued packets 1286 spin_unlock(&bp->DriverLock); 1287 send_queued_packets(smc); 1288 spin_lock(&bp->DriverLock); 1289 netif_start_queue(bp->dev);// system may send again if it was blocked 1290 1291 } // llc_restart_tx 1292 1293 1294 /************************ 1295 * 1296 * mac_drv_get_space 1297 * 1298 * The hardware module calls this function to allocate the memory 1299 * for the SMT MBufs if the define MB_OUTSIDE_SMC is specified. 1300 * Args 1301 * smc - A pointer to the SMT context struct. 1302 * 1303 * size - Size of memory in bytes to allocate. 1304 * Out 1305 * != 0 A pointer to the virtual address of the allocated memory. 1306 * == 0 Allocation error. 1307 * 1308 ************************/ mac_drv_get_space(struct s_smc * smc,unsigned int size)1309 void *mac_drv_get_space(struct s_smc *smc, unsigned int size) 1310 { 1311 void *virt; 1312 1313 pr_debug("mac_drv_get_space (%d bytes), ", size); 1314 virt = (void *) (smc->os.SharedMemAddr + smc->os.SharedMemHeap); 1315 1316 if ((smc->os.SharedMemHeap + size) > smc->os.SharedMemSize) { 1317 printk("Unexpected SMT memory size requested: %d\n", size); 1318 return NULL; 1319 } 1320 smc->os.SharedMemHeap += size; // Move heap pointer. 1321 1322 pr_debug("mac_drv_get_space end\n"); 1323 pr_debug("virt addr: %lx\n", (ulong) virt); 1324 pr_debug("bus addr: %lx\n", (ulong) 1325 (smc->os.SharedMemDMA + 1326 ((char *) virt - (char *)smc->os.SharedMemAddr))); 1327 return virt; 1328 } // mac_drv_get_space 1329 1330 1331 /************************ 1332 * 1333 * mac_drv_get_desc_mem 1334 * 1335 * This function is called by the hardware dependent module. 1336 * It allocates the memory for the RxD and TxD descriptors. 1337 * 1338 * This memory must be non-cached, non-movable and non-swappable. 1339 * This memory should start at a physical page boundary. 1340 * Args 1341 * smc - A pointer to the SMT context struct. 1342 * 1343 * size - Size of memory in bytes to allocate. 1344 * Out 1345 * != 0 A pointer to the virtual address of the allocated memory. 1346 * == 0 Allocation error. 1347 * 1348 ************************/ mac_drv_get_desc_mem(struct s_smc * smc,unsigned int size)1349 void *mac_drv_get_desc_mem(struct s_smc *smc, unsigned int size) 1350 { 1351 1352 char *virt; 1353 1354 pr_debug("mac_drv_get_desc_mem\n"); 1355 1356 // Descriptor memory must be aligned on 16-byte boundary. 1357 1358 virt = mac_drv_get_space(smc, size); 1359 1360 size = (u_int) (16 - (((unsigned long) virt) & 15UL)); 1361 size = size % 16; 1362 1363 pr_debug("Allocate %u bytes alignment gap ", size); 1364 pr_debug("for descriptor memory.\n"); 1365 1366 if (!mac_drv_get_space(smc, size)) { 1367 printk("fddi: Unable to align descriptor memory.\n"); 1368 return NULL; 1369 } 1370 return virt + size; 1371 } // mac_drv_get_desc_mem 1372 1373 1374 /************************ 1375 * 1376 * mac_drv_virt2phys 1377 * 1378 * Get the physical address of a given virtual address. 1379 * Args 1380 * smc - A pointer to the SMT context struct. 1381 * 1382 * virt - A (virtual) pointer into our 'shared' memory area. 1383 * Out 1384 * Physical address of the given virtual address. 1385 * 1386 ************************/ mac_drv_virt2phys(struct s_smc * smc,void * virt)1387 unsigned long mac_drv_virt2phys(struct s_smc *smc, void *virt) 1388 { 1389 return smc->os.SharedMemDMA + 1390 ((char *) virt - (char *)smc->os.SharedMemAddr); 1391 } // mac_drv_virt2phys 1392 1393 1394 /************************ 1395 * 1396 * dma_master 1397 * 1398 * The HWM calls this function, when the driver leads through a DMA 1399 * transfer. If the OS-specific module must prepare the system hardware 1400 * for the DMA transfer, it should do it in this function. 1401 * 1402 * The hardware module calls this dma_master if it wants to send an SMT 1403 * frame. This means that the virt address passed in here is part of 1404 * the 'shared' memory area. 1405 * Args 1406 * smc - A pointer to the SMT context struct. 1407 * 1408 * virt - The virtual address of the data. 1409 * 1410 * len - The length in bytes of the data. 1411 * 1412 * flag - Indicates the transmit direction and the buffer type: 1413 * DMA_RD (0x01) system RAM ==> adapter buffer memory 1414 * DMA_WR (0x02) adapter buffer memory ==> system RAM 1415 * SMT_BUF (0x80) SMT buffer 1416 * 1417 * >> NOTE: SMT_BUF and DMA_RD are always set for PCI. << 1418 * Out 1419 * Returns the pyhsical address for the DMA transfer. 1420 * 1421 ************************/ dma_master(struct s_smc * smc,void * virt,int len,int flag)1422 u_long dma_master(struct s_smc * smc, void *virt, int len, int flag) 1423 { 1424 return smc->os.SharedMemDMA + 1425 ((char *) virt - (char *)smc->os.SharedMemAddr); 1426 } // dma_master 1427 1428 1429 /************************ 1430 * 1431 * dma_complete 1432 * 1433 * The hardware module calls this routine when it has completed a DMA 1434 * transfer. If the operating system dependent module has set up the DMA 1435 * channel via dma_master() (e.g. Windows NT or AIX) it should clean up 1436 * the DMA channel. 1437 * Args 1438 * smc - A pointer to the SMT context struct. 1439 * 1440 * descr - A pointer to a TxD or RxD, respectively. 1441 * 1442 * flag - Indicates the DMA transfer direction / SMT buffer: 1443 * DMA_RD (0x01) system RAM ==> adapter buffer memory 1444 * DMA_WR (0x02) adapter buffer memory ==> system RAM 1445 * SMT_BUF (0x80) SMT buffer (managed by HWM) 1446 * Out 1447 * Nothing. 1448 * 1449 ************************/ dma_complete(struct s_smc * smc,volatile union s_fp_descr * descr,int flag)1450 void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr, int flag) 1451 { 1452 /* For TX buffers, there are two cases. If it is an SMT transmit 1453 * buffer, there is nothing to do since we use consistent memory 1454 * for the 'shared' memory area. The other case is for normal 1455 * transmit packets given to us by the networking stack, and in 1456 * that case we cleanup the PCI DMA mapping in mac_drv_tx_complete 1457 * below. 1458 * 1459 * For RX buffers, we have to unmap dynamic PCI DMA mappings here 1460 * because the hardware module is about to potentially look at 1461 * the contents of the buffer. If we did not call the PCI DMA 1462 * unmap first, the hardware module could read inconsistent data. 1463 */ 1464 if (flag & DMA_WR) { 1465 skfddi_priv *bp = &smc->os; 1466 volatile struct s_smt_fp_rxd *r = &descr->r; 1467 1468 /* If SKB is NULL, we used the local buffer. */ 1469 if (r->rxd_os.skb && r->rxd_os.dma_addr) { 1470 int MaxFrameSize = bp->MaxFrameSize; 1471 1472 dma_unmap_single(&(&bp->pdev)->dev, 1473 r->rxd_os.dma_addr, MaxFrameSize, 1474 DMA_FROM_DEVICE); 1475 r->rxd_os.dma_addr = 0; 1476 } 1477 } 1478 } // dma_complete 1479 1480 1481 /************************ 1482 * 1483 * mac_drv_tx_complete 1484 * 1485 * Transmit of a packet is complete. Release the tx staging buffer. 1486 * 1487 * Args 1488 * smc - A pointer to the SMT context struct. 1489 * 1490 * txd - A pointer to the last TxD which is used by the frame. 1491 * Out 1492 * Returns nothing. 1493 * 1494 ************************/ mac_drv_tx_complete(struct s_smc * smc,volatile struct s_smt_fp_txd * txd)1495 void mac_drv_tx_complete(struct s_smc *smc, volatile struct s_smt_fp_txd *txd) 1496 { 1497 struct sk_buff *skb; 1498 1499 pr_debug("entering mac_drv_tx_complete\n"); 1500 // Check if this TxD points to a skb 1501 1502 if (!(skb = txd->txd_os.skb)) { 1503 pr_debug("TXD with no skb assigned.\n"); 1504 return; 1505 } 1506 txd->txd_os.skb = NULL; 1507 1508 // release the DMA mapping 1509 dma_unmap_single(&(&smc->os.pdev)->dev, txd->txd_os.dma_addr, 1510 skb->len, DMA_TO_DEVICE); 1511 txd->txd_os.dma_addr = 0; 1512 1513 smc->os.MacStat.gen.tx_packets++; // Count transmitted packets. 1514 smc->os.MacStat.gen.tx_bytes+=skb->len; // Count bytes 1515 1516 // free the skb 1517 dev_kfree_skb_irq(skb); 1518 1519 pr_debug("leaving mac_drv_tx_complete\n"); 1520 } // mac_drv_tx_complete 1521 1522 1523 /************************ 1524 * 1525 * dump packets to logfile 1526 * 1527 ************************/ 1528 #ifdef DUMPPACKETS dump_data(unsigned char * Data,int length)1529 void dump_data(unsigned char *Data, int length) 1530 { 1531 printk(KERN_INFO "---Packet start---\n"); 1532 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, Data, min_t(size_t, length, 64), false); 1533 printk(KERN_INFO "------------------\n"); 1534 } // dump_data 1535 #else 1536 #define dump_data(data,len) 1537 #endif // DUMPPACKETS 1538 1539 /************************ 1540 * 1541 * mac_drv_rx_complete 1542 * 1543 * The hardware module calls this function if an LLC frame is received 1544 * in a receive buffer. Also the SMT, NSA, and directed beacon frames 1545 * from the network will be passed to the LLC layer by this function 1546 * if passing is enabled. 1547 * 1548 * mac_drv_rx_complete forwards the frame to the LLC layer if it should 1549 * be received. It also fills the RxD ring with new receive buffers if 1550 * some can be queued. 1551 * Args 1552 * smc - A pointer to the SMT context struct. 1553 * 1554 * rxd - A pointer to the first RxD which is used by the receive frame. 1555 * 1556 * frag_count - Count of RxDs used by the received frame. 1557 * 1558 * len - Frame length. 1559 * Out 1560 * Nothing. 1561 * 1562 ************************/ mac_drv_rx_complete(struct s_smc * smc,volatile struct s_smt_fp_rxd * rxd,int frag_count,int len)1563 void mac_drv_rx_complete(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd, 1564 int frag_count, int len) 1565 { 1566 skfddi_priv *bp = &smc->os; 1567 struct sk_buff *skb; 1568 unsigned char *virt, *cp; 1569 unsigned short ri; 1570 u_int RifLength; 1571 1572 pr_debug("entering mac_drv_rx_complete (len=%d)\n", len); 1573 if (frag_count != 1) { // This is not allowed to happen. 1574 1575 printk("fddi: Multi-fragment receive!\n"); 1576 goto RequeueRxd; // Re-use the given RXD(s). 1577 1578 } 1579 skb = rxd->rxd_os.skb; 1580 if (!skb) { 1581 pr_debug("No skb in rxd\n"); 1582 smc->os.MacStat.gen.rx_errors++; 1583 goto RequeueRxd; 1584 } 1585 virt = skb->data; 1586 1587 // The DMA mapping was released in dma_complete above. 1588 1589 dump_data(skb->data, len); 1590 1591 /* 1592 * FDDI Frame format: 1593 * +-------+-------+-------+------------+--------+------------+ 1594 * | FC[1] | DA[6] | SA[6] | RIF[0..18] | LLC[3] | Data[0..n] | 1595 * +-------+-------+-------+------------+--------+------------+ 1596 * 1597 * FC = Frame Control 1598 * DA = Destination Address 1599 * SA = Source Address 1600 * RIF = Routing Information Field 1601 * LLC = Logical Link Control 1602 */ 1603 1604 // Remove Routing Information Field (RIF), if present. 1605 1606 if ((virt[1 + 6] & FDDI_RII) == 0) 1607 RifLength = 0; 1608 else { 1609 int n; 1610 // goos: RIF removal has still to be tested 1611 pr_debug("RIF found\n"); 1612 // Get RIF length from Routing Control (RC) field. 1613 cp = virt + FDDI_MAC_HDR_LEN; // Point behind MAC header. 1614 1615 ri = ntohs(*((__be16 *) cp)); 1616 RifLength = ri & FDDI_RCF_LEN_MASK; 1617 if (len < (int) (FDDI_MAC_HDR_LEN + RifLength)) { 1618 printk("fddi: Invalid RIF.\n"); 1619 goto RequeueRxd; // Discard the frame. 1620 1621 } 1622 virt[1 + 6] &= ~FDDI_RII; // Clear RII bit. 1623 // regions overlap 1624 1625 virt = cp + RifLength; 1626 for (n = FDDI_MAC_HDR_LEN; n; n--) 1627 *--virt = *--cp; 1628 // adjust sbd->data pointer 1629 skb_pull(skb, RifLength); 1630 len -= RifLength; 1631 RifLength = 0; 1632 } 1633 1634 // Count statistics. 1635 smc->os.MacStat.gen.rx_packets++; // Count indicated receive 1636 // packets. 1637 smc->os.MacStat.gen.rx_bytes+=len; // Count bytes. 1638 1639 // virt points to header again 1640 if (virt[1] & 0x01) { // Check group (multicast) bit. 1641 1642 smc->os.MacStat.gen.multicast++; 1643 } 1644 1645 // deliver frame to system 1646 rxd->rxd_os.skb = NULL; 1647 skb_trim(skb, len); 1648 skb->protocol = fddi_type_trans(skb, bp->dev); 1649 1650 netif_rx(skb); 1651 1652 HWM_RX_CHECK(smc, RX_LOW_WATERMARK); 1653 return; 1654 1655 RequeueRxd: 1656 pr_debug("Rx: re-queue RXD.\n"); 1657 mac_drv_requeue_rxd(smc, rxd, frag_count); 1658 smc->os.MacStat.gen.rx_errors++; // Count receive packets 1659 // not indicated. 1660 1661 } // mac_drv_rx_complete 1662 1663 1664 /************************ 1665 * 1666 * mac_drv_requeue_rxd 1667 * 1668 * The hardware module calls this function to request the OS-specific 1669 * module to queue the receive buffer(s) represented by the pointer 1670 * to the RxD and the frag_count into the receive queue again. This 1671 * buffer was filled with an invalid frame or an SMT frame. 1672 * Args 1673 * smc - A pointer to the SMT context struct. 1674 * 1675 * rxd - A pointer to the first RxD which is used by the receive frame. 1676 * 1677 * frag_count - Count of RxDs used by the received frame. 1678 * Out 1679 * Nothing. 1680 * 1681 ************************/ mac_drv_requeue_rxd(struct s_smc * smc,volatile struct s_smt_fp_rxd * rxd,int frag_count)1682 void mac_drv_requeue_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd, 1683 int frag_count) 1684 { 1685 volatile struct s_smt_fp_rxd *next_rxd; 1686 volatile struct s_smt_fp_rxd *src_rxd; 1687 struct sk_buff *skb; 1688 int MaxFrameSize; 1689 unsigned char *v_addr; 1690 dma_addr_t b_addr; 1691 1692 if (frag_count != 1) // This is not allowed to happen. 1693 1694 printk("fddi: Multi-fragment requeue!\n"); 1695 1696 MaxFrameSize = smc->os.MaxFrameSize; 1697 src_rxd = rxd; 1698 for (; frag_count > 0; frag_count--) { 1699 next_rxd = src_rxd->rxd_next; 1700 rxd = HWM_GET_CURR_RXD(smc); 1701 1702 skb = src_rxd->rxd_os.skb; 1703 if (skb == NULL) { // this should not happen 1704 1705 pr_debug("Requeue with no skb in rxd!\n"); 1706 skb = alloc_skb(MaxFrameSize + 3, GFP_ATOMIC); 1707 if (skb) { 1708 // we got a skb 1709 rxd->rxd_os.skb = skb; 1710 skb_reserve(skb, 3); 1711 skb_put(skb, MaxFrameSize); 1712 v_addr = skb->data; 1713 b_addr = dma_map_single(&(&smc->os.pdev)->dev, 1714 v_addr, MaxFrameSize, 1715 DMA_FROM_DEVICE); 1716 rxd->rxd_os.dma_addr = b_addr; 1717 } else { 1718 // no skb available, use local buffer 1719 pr_debug("Queueing invalid buffer!\n"); 1720 rxd->rxd_os.skb = NULL; 1721 v_addr = smc->os.LocalRxBuffer; 1722 b_addr = smc->os.LocalRxBufferDMA; 1723 } 1724 } else { 1725 // we use skb from old rxd 1726 rxd->rxd_os.skb = skb; 1727 v_addr = skb->data; 1728 b_addr = dma_map_single(&(&smc->os.pdev)->dev, v_addr, 1729 MaxFrameSize, DMA_FROM_DEVICE); 1730 rxd->rxd_os.dma_addr = b_addr; 1731 } 1732 hwm_rx_frag(smc, v_addr, b_addr, MaxFrameSize, 1733 FIRST_FRAG | LAST_FRAG); 1734 1735 src_rxd = next_rxd; 1736 } 1737 } // mac_drv_requeue_rxd 1738 1739 1740 /************************ 1741 * 1742 * mac_drv_fill_rxd 1743 * 1744 * The hardware module calls this function at initialization time 1745 * to fill the RxD ring with receive buffers. It is also called by 1746 * mac_drv_rx_complete if rx_free is large enough to queue some new 1747 * receive buffers into the RxD ring. mac_drv_fill_rxd queues new 1748 * receive buffers as long as enough RxDs and receive buffers are 1749 * available. 1750 * Args 1751 * smc - A pointer to the SMT context struct. 1752 * Out 1753 * Nothing. 1754 * 1755 ************************/ mac_drv_fill_rxd(struct s_smc * smc)1756 void mac_drv_fill_rxd(struct s_smc *smc) 1757 { 1758 int MaxFrameSize; 1759 unsigned char *v_addr; 1760 unsigned long b_addr; 1761 struct sk_buff *skb; 1762 volatile struct s_smt_fp_rxd *rxd; 1763 1764 pr_debug("entering mac_drv_fill_rxd\n"); 1765 1766 // Walk through the list of free receive buffers, passing receive 1767 // buffers to the HWM as long as RXDs are available. 1768 1769 MaxFrameSize = smc->os.MaxFrameSize; 1770 // Check if there is any RXD left. 1771 while (HWM_GET_RX_FREE(smc) > 0) { 1772 pr_debug(".\n"); 1773 1774 rxd = HWM_GET_CURR_RXD(smc); 1775 skb = alloc_skb(MaxFrameSize + 3, GFP_ATOMIC); 1776 if (skb) { 1777 // we got a skb 1778 skb_reserve(skb, 3); 1779 skb_put(skb, MaxFrameSize); 1780 v_addr = skb->data; 1781 b_addr = dma_map_single(&(&smc->os.pdev)->dev, v_addr, 1782 MaxFrameSize, DMA_FROM_DEVICE); 1783 rxd->rxd_os.dma_addr = b_addr; 1784 } else { 1785 // no skb available, use local buffer 1786 // System has run out of buffer memory, but we want to 1787 // keep the receiver running in hope of better times. 1788 // Multiple descriptors may point to this local buffer, 1789 // so data in it must be considered invalid. 1790 pr_debug("Queueing invalid buffer!\n"); 1791 v_addr = smc->os.LocalRxBuffer; 1792 b_addr = smc->os.LocalRxBufferDMA; 1793 } 1794 1795 rxd->rxd_os.skb = skb; 1796 1797 // Pass receive buffer to HWM. 1798 hwm_rx_frag(smc, v_addr, b_addr, MaxFrameSize, 1799 FIRST_FRAG | LAST_FRAG); 1800 } 1801 pr_debug("leaving mac_drv_fill_rxd\n"); 1802 } // mac_drv_fill_rxd 1803 1804 1805 /************************ 1806 * 1807 * mac_drv_clear_rxd 1808 * 1809 * The hardware module calls this function to release unused 1810 * receive buffers. 1811 * Args 1812 * smc - A pointer to the SMT context struct. 1813 * 1814 * rxd - A pointer to the first RxD which is used by the receive buffer. 1815 * 1816 * frag_count - Count of RxDs used by the receive buffer. 1817 * Out 1818 * Nothing. 1819 * 1820 ************************/ mac_drv_clear_rxd(struct s_smc * smc,volatile struct s_smt_fp_rxd * rxd,int frag_count)1821 void mac_drv_clear_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd, 1822 int frag_count) 1823 { 1824 1825 struct sk_buff *skb; 1826 1827 pr_debug("entering mac_drv_clear_rxd\n"); 1828 1829 if (frag_count != 1) // This is not allowed to happen. 1830 1831 printk("fddi: Multi-fragment clear!\n"); 1832 1833 for (; frag_count > 0; frag_count--) { 1834 skb = rxd->rxd_os.skb; 1835 if (skb != NULL) { 1836 skfddi_priv *bp = &smc->os; 1837 int MaxFrameSize = bp->MaxFrameSize; 1838 1839 dma_unmap_single(&(&bp->pdev)->dev, 1840 rxd->rxd_os.dma_addr, MaxFrameSize, 1841 DMA_FROM_DEVICE); 1842 1843 dev_kfree_skb(skb); 1844 rxd->rxd_os.skb = NULL; 1845 } 1846 rxd = rxd->rxd_next; // Next RXD. 1847 1848 } 1849 } // mac_drv_clear_rxd 1850 1851 1852 /************************ 1853 * 1854 * mac_drv_rx_init 1855 * 1856 * The hardware module calls this routine when an SMT or NSA frame of the 1857 * local SMT should be delivered to the LLC layer. 1858 * 1859 * It is necessary to have this function, because there is no other way to 1860 * copy the contents of SMT MBufs into receive buffers. 1861 * 1862 * mac_drv_rx_init allocates the required target memory for this frame, 1863 * and receives the frame fragment by fragment by calling mac_drv_rx_frag. 1864 * Args 1865 * smc - A pointer to the SMT context struct. 1866 * 1867 * len - The length (in bytes) of the received frame (FC, DA, SA, Data). 1868 * 1869 * fc - The Frame Control field of the received frame. 1870 * 1871 * look_ahead - A pointer to the lookahead data buffer (may be NULL). 1872 * 1873 * la_len - The length of the lookahead data stored in the lookahead 1874 * buffer (may be zero). 1875 * Out 1876 * Always returns zero (0). 1877 * 1878 ************************/ mac_drv_rx_init(struct s_smc * smc,int len,int fc,char * look_ahead,int la_len)1879 int mac_drv_rx_init(struct s_smc *smc, int len, int fc, 1880 char *look_ahead, int la_len) 1881 { 1882 struct sk_buff *skb; 1883 1884 pr_debug("entering mac_drv_rx_init(len=%d)\n", len); 1885 1886 // "Received" a SMT or NSA frame of the local SMT. 1887 1888 if (len != la_len || len < FDDI_MAC_HDR_LEN || !look_ahead) { 1889 pr_debug("fddi: Discard invalid local SMT frame\n"); 1890 pr_debug(" len=%d, la_len=%d, (ULONG) look_ahead=%08lXh.\n", 1891 len, la_len, (unsigned long) look_ahead); 1892 return 0; 1893 } 1894 skb = alloc_skb(len + 3, GFP_ATOMIC); 1895 if (!skb) { 1896 pr_debug("fddi: Local SMT: skb memory exhausted.\n"); 1897 return 0; 1898 } 1899 skb_reserve(skb, 3); 1900 skb_put(skb, len); 1901 skb_copy_to_linear_data(skb, look_ahead, len); 1902 1903 // deliver frame to system 1904 skb->protocol = fddi_type_trans(skb, smc->os.dev); 1905 netif_rx(skb); 1906 1907 return 0; 1908 } // mac_drv_rx_init 1909 1910 1911 /************************ 1912 * 1913 * smt_timer_poll 1914 * 1915 * This routine is called periodically by the SMT module to clean up the 1916 * driver. 1917 * 1918 * Return any queued frames back to the upper protocol layers if the ring 1919 * is down. 1920 * Args 1921 * smc - A pointer to the SMT context struct. 1922 * Out 1923 * Nothing. 1924 * 1925 ************************/ smt_timer_poll(struct s_smc * smc)1926 void smt_timer_poll(struct s_smc *smc) 1927 { 1928 } // smt_timer_poll 1929 1930 1931 /************************ 1932 * 1933 * ring_status_indication 1934 * 1935 * This function indicates a change of the ring state. 1936 * Args 1937 * smc - A pointer to the SMT context struct. 1938 * 1939 * status - The current ring status. 1940 * Out 1941 * Nothing. 1942 * 1943 ************************/ ring_status_indication(struct s_smc * smc,u_long status)1944 void ring_status_indication(struct s_smc *smc, u_long status) 1945 { 1946 pr_debug("ring_status_indication( "); 1947 if (status & RS_RES15) 1948 pr_debug("RS_RES15 "); 1949 if (status & RS_HARDERROR) 1950 pr_debug("RS_HARDERROR "); 1951 if (status & RS_SOFTERROR) 1952 pr_debug("RS_SOFTERROR "); 1953 if (status & RS_BEACON) 1954 pr_debug("RS_BEACON "); 1955 if (status & RS_PATHTEST) 1956 pr_debug("RS_PATHTEST "); 1957 if (status & RS_SELFTEST) 1958 pr_debug("RS_SELFTEST "); 1959 if (status & RS_RES9) 1960 pr_debug("RS_RES9 "); 1961 if (status & RS_DISCONNECT) 1962 pr_debug("RS_DISCONNECT "); 1963 if (status & RS_RES7) 1964 pr_debug("RS_RES7 "); 1965 if (status & RS_DUPADDR) 1966 pr_debug("RS_DUPADDR "); 1967 if (status & RS_NORINGOP) 1968 pr_debug("RS_NORINGOP "); 1969 if (status & RS_VERSION) 1970 pr_debug("RS_VERSION "); 1971 if (status & RS_STUCKBYPASSS) 1972 pr_debug("RS_STUCKBYPASSS "); 1973 if (status & RS_EVENT) 1974 pr_debug("RS_EVENT "); 1975 if (status & RS_RINGOPCHANGE) 1976 pr_debug("RS_RINGOPCHANGE "); 1977 if (status & RS_RES0) 1978 pr_debug("RS_RES0 "); 1979 pr_debug("]\n"); 1980 } // ring_status_indication 1981 1982 1983 /************************ 1984 * 1985 * smt_get_time 1986 * 1987 * Gets the current time from the system. 1988 * Args 1989 * None. 1990 * Out 1991 * The current time in TICKS_PER_SECOND. 1992 * 1993 * TICKS_PER_SECOND has the unit 'count of timer ticks per second'. It is 1994 * defined in "targetos.h". The definition of TICKS_PER_SECOND must comply 1995 * to the time returned by smt_get_time(). 1996 * 1997 ************************/ smt_get_time(void)1998 unsigned long smt_get_time(void) 1999 { 2000 return jiffies; 2001 } // smt_get_time 2002 2003 2004 /************************ 2005 * 2006 * smt_stat_counter 2007 * 2008 * Status counter update (ring_op, fifo full). 2009 * Args 2010 * smc - A pointer to the SMT context struct. 2011 * 2012 * stat - = 0: A ring operational change occurred. 2013 * = 1: The FORMAC FIFO buffer is full / FIFO overflow. 2014 * Out 2015 * Nothing. 2016 * 2017 ************************/ smt_stat_counter(struct s_smc * smc,int stat)2018 void smt_stat_counter(struct s_smc *smc, int stat) 2019 { 2020 // BOOLEAN RingIsUp ; 2021 2022 pr_debug("smt_stat_counter\n"); 2023 switch (stat) { 2024 case 0: 2025 pr_debug("Ring operational change.\n"); 2026 break; 2027 case 1: 2028 pr_debug("Receive fifo overflow.\n"); 2029 smc->os.MacStat.gen.rx_errors++; 2030 break; 2031 default: 2032 pr_debug("Unknown status (%d).\n", stat); 2033 break; 2034 } 2035 } // smt_stat_counter 2036 2037 2038 /************************ 2039 * 2040 * cfm_state_change 2041 * 2042 * Sets CFM state in custom statistics. 2043 * Args 2044 * smc - A pointer to the SMT context struct. 2045 * 2046 * c_state - Possible values are: 2047 * 2048 * EC0_OUT, EC1_IN, EC2_TRACE, EC3_LEAVE, EC4_PATH_TEST, 2049 * EC5_INSERT, EC6_CHECK, EC7_DEINSERT 2050 * Out 2051 * Nothing. 2052 * 2053 ************************/ cfm_state_change(struct s_smc * smc,int c_state)2054 void cfm_state_change(struct s_smc *smc, int c_state) 2055 { 2056 #ifdef DRIVERDEBUG 2057 char *s; 2058 2059 switch (c_state) { 2060 case SC0_ISOLATED: 2061 s = "SC0_ISOLATED"; 2062 break; 2063 case SC1_WRAP_A: 2064 s = "SC1_WRAP_A"; 2065 break; 2066 case SC2_WRAP_B: 2067 s = "SC2_WRAP_B"; 2068 break; 2069 case SC4_THRU_A: 2070 s = "SC4_THRU_A"; 2071 break; 2072 case SC5_THRU_B: 2073 s = "SC5_THRU_B"; 2074 break; 2075 case SC7_WRAP_S: 2076 s = "SC7_WRAP_S"; 2077 break; 2078 case SC9_C_WRAP_A: 2079 s = "SC9_C_WRAP_A"; 2080 break; 2081 case SC10_C_WRAP_B: 2082 s = "SC10_C_WRAP_B"; 2083 break; 2084 case SC11_C_WRAP_S: 2085 s = "SC11_C_WRAP_S"; 2086 break; 2087 default: 2088 pr_debug("cfm_state_change: unknown %d\n", c_state); 2089 return; 2090 } 2091 pr_debug("cfm_state_change: %s\n", s); 2092 #endif // DRIVERDEBUG 2093 } // cfm_state_change 2094 2095 2096 /************************ 2097 * 2098 * ecm_state_change 2099 * 2100 * Sets ECM state in custom statistics. 2101 * Args 2102 * smc - A pointer to the SMT context struct. 2103 * 2104 * e_state - Possible values are: 2105 * 2106 * SC0_ISOLATED, SC1_WRAP_A (5), SC2_WRAP_B (6), SC4_THRU_A (12), 2107 * SC5_THRU_B (7), SC7_WRAP_S (8) 2108 * Out 2109 * Nothing. 2110 * 2111 ************************/ ecm_state_change(struct s_smc * smc,int e_state)2112 void ecm_state_change(struct s_smc *smc, int e_state) 2113 { 2114 #ifdef DRIVERDEBUG 2115 char *s; 2116 2117 switch (e_state) { 2118 case EC0_OUT: 2119 s = "EC0_OUT"; 2120 break; 2121 case EC1_IN: 2122 s = "EC1_IN"; 2123 break; 2124 case EC2_TRACE: 2125 s = "EC2_TRACE"; 2126 break; 2127 case EC3_LEAVE: 2128 s = "EC3_LEAVE"; 2129 break; 2130 case EC4_PATH_TEST: 2131 s = "EC4_PATH_TEST"; 2132 break; 2133 case EC5_INSERT: 2134 s = "EC5_INSERT"; 2135 break; 2136 case EC6_CHECK: 2137 s = "EC6_CHECK"; 2138 break; 2139 case EC7_DEINSERT: 2140 s = "EC7_DEINSERT"; 2141 break; 2142 default: 2143 s = "unknown"; 2144 break; 2145 } 2146 pr_debug("ecm_state_change: %s\n", s); 2147 #endif //DRIVERDEBUG 2148 } // ecm_state_change 2149 2150 2151 /************************ 2152 * 2153 * rmt_state_change 2154 * 2155 * Sets RMT state in custom statistics. 2156 * Args 2157 * smc - A pointer to the SMT context struct. 2158 * 2159 * r_state - Possible values are: 2160 * 2161 * RM0_ISOLATED, RM1_NON_OP, RM2_RING_OP, RM3_DETECT, 2162 * RM4_NON_OP_DUP, RM5_RING_OP_DUP, RM6_DIRECTED, RM7_TRACE 2163 * Out 2164 * Nothing. 2165 * 2166 ************************/ rmt_state_change(struct s_smc * smc,int r_state)2167 void rmt_state_change(struct s_smc *smc, int r_state) 2168 { 2169 #ifdef DRIVERDEBUG 2170 char *s; 2171 2172 switch (r_state) { 2173 case RM0_ISOLATED: 2174 s = "RM0_ISOLATED"; 2175 break; 2176 case RM1_NON_OP: 2177 s = "RM1_NON_OP - not operational"; 2178 break; 2179 case RM2_RING_OP: 2180 s = "RM2_RING_OP - ring operational"; 2181 break; 2182 case RM3_DETECT: 2183 s = "RM3_DETECT - detect dupl addresses"; 2184 break; 2185 case RM4_NON_OP_DUP: 2186 s = "RM4_NON_OP_DUP - dupl. addr detected"; 2187 break; 2188 case RM5_RING_OP_DUP: 2189 s = "RM5_RING_OP_DUP - ring oper. with dupl. addr"; 2190 break; 2191 case RM6_DIRECTED: 2192 s = "RM6_DIRECTED - sending directed beacons"; 2193 break; 2194 case RM7_TRACE: 2195 s = "RM7_TRACE - trace initiated"; 2196 break; 2197 default: 2198 s = "unknown"; 2199 break; 2200 } 2201 pr_debug("[rmt_state_change: %s]\n", s); 2202 #endif // DRIVERDEBUG 2203 } // rmt_state_change 2204 2205 2206 /************************ 2207 * 2208 * drv_reset_indication 2209 * 2210 * This function is called by the SMT when it has detected a severe 2211 * hardware problem. The driver should perform a reset on the adapter 2212 * as soon as possible, but not from within this function. 2213 * Args 2214 * smc - A pointer to the SMT context struct. 2215 * Out 2216 * Nothing. 2217 * 2218 ************************/ drv_reset_indication(struct s_smc * smc)2219 void drv_reset_indication(struct s_smc *smc) 2220 { 2221 pr_debug("entering drv_reset_indication\n"); 2222 2223 smc->os.ResetRequested = TRUE; // Set flag. 2224 2225 } // drv_reset_indication 2226 2227 static struct pci_driver skfddi_pci_driver = { 2228 .name = "skfddi", 2229 .id_table = skfddi_pci_tbl, 2230 .probe = skfp_init_one, 2231 .remove = skfp_remove_one, 2232 }; 2233 2234 module_pci_driver(skfddi_pci_driver); 2235