5 * Copyright Information:
6 * Copyright SysKonnect 1998,1999.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * The information in this file is provided "AS IS" without warranty.
16 * A Linux device driver supporting the SysKonnect FDDI PCI controller
20 * CG Christoph Goos (cgoos@syskonnect.de)
25 * Address all question to:
28 * The technical manual for the adapters is available from SysKonnect's
29 * web pages: www.syskonnect.com
30 * Goto "Support" and search Knowledge Base for "manual".
32 * Driver Architecture:
33 * The driver architecture is based on the DEC FDDI driver by
34 * Lawrence V. Stefani and several ethernet drivers.
35 * I also used an existing Windows NT miniport driver.
36 * All hardware dependent fuctions are handled by the SysKonnect
38 * The only headerfiles that are directly related to this source
39 * are skfddi.c, h/types.h, h/osdef1st.h, h/targetos.h.
40 * The others belong to the SysKonnect FDDI Hardware Module and
41 * should better not be changed.
43 * Modification History:
44 * Date Name Description
45 * 02-Mar-98 CG Created.
47 * 10-Mar-99 CG Support for 2.2.x added.
48 * 25-Mar-99 CG Corrected IRQ routing for SMP (APIC)
49 * 26-Oct-99 CG Fixed compilation error on 2.2.13
50 * 12-Nov-99 CG Source code release
51 * 22-Nov-99 CG Included in kernel source.
52 * 07-May-00 DM 64 bit fixes, new dma interface
53 * 31-Jul-03 DB Audit copy_*_user in skfp_ioctl
54 * Daniele Bellucci <bellucda@tiscali.it>
55 * 03-Dec-03 SH Convert to PCI device model
57 * Compilation options (-Dxxx):
58 * DRIVERDEBUG print lots of messages to log file
59 * DUMPPACKETS print received/transmitted packets to logfile
61 * Tested cpu architectures:
66 /* Version information string - should be updated prior to */
67 /* each new release!!! */
68 #define VERSION "2.07"
70 static const char *boot_msg =
71 "SysKonnect FDDI PCI Adapter driver v" VERSION " for\n"
72 " SK-55xx/SK-58xx adapters (SK-NET FDDI-FP/UP/LP)";
76 #include <linux/module.h>
77 #include <linux/kernel.h>
78 #include <linux/errno.h>
79 #include <linux/ioport.h>
80 #include <linux/slab.h>
81 #include <linux/interrupt.h>
82 #include <linux/pci.h>
83 #include <linux/netdevice.h>
84 #include <linux/fddidevice.h>
85 #include <linux/skbuff.h>
87 #include <asm/byteorder.h>
88 #include <asm/bitops.h>
90 #include <asm/uaccess.h>
93 #undef ADDR // undo Linux definition
97 #include "h/smtstate.h"
100 // Define module-wide (static) routines
101 static int skfp_driver_init(struct net_device *dev);
102 static int skfp_open(struct net_device *dev);
103 static int skfp_close(struct net_device *dev);
104 static irqreturn_t skfp_interrupt(int irq, void *dev_id, struct pt_regs *regs);
105 static struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev);
106 static void skfp_ctl_set_multicast_list(struct net_device *dev);
107 static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev);
108 static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr);
109 static int skfp_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
110 static int skfp_send_pkt(struct sk_buff *skb, struct net_device *dev);
111 static void send_queued_packets(struct s_smc *smc);
112 static void CheckSourceAddress(unsigned char *frame, unsigned char *hw_addr);
113 static void ResetAdapter(struct s_smc *smc);
116 // Functions needed by the hardware module
117 void *mac_drv_get_space(struct s_smc *smc, u_int size);
118 void *mac_drv_get_desc_mem(struct s_smc *smc, u_int size);
119 unsigned long mac_drv_virt2phys(struct s_smc *smc, void *virt);
120 unsigned long dma_master(struct s_smc *smc, void *virt, int len, int flag);
121 void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr,
123 void mac_drv_tx_complete(struct s_smc *smc, volatile struct s_smt_fp_txd *txd);
124 void llc_restart_tx(struct s_smc *smc);
125 void mac_drv_rx_complete(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
126 int frag_count, int len);
127 void mac_drv_requeue_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
129 void mac_drv_fill_rxd(struct s_smc *smc);
130 void mac_drv_clear_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
132 int mac_drv_rx_init(struct s_smc *smc, int len, int fc, char *look_ahead,
134 void dump_data(unsigned char *Data, int length);
136 // External functions from the hardware module
137 extern u_int mac_drv_check_space(void);
138 extern void read_address(struct s_smc *smc, u_char * mac_addr);
139 extern void card_stop(struct s_smc *smc);
140 extern int mac_drv_init(struct s_smc *smc);
141 extern void hwm_tx_frag(struct s_smc *smc, char far * virt, u_long phys,
142 int len, int frame_status);
143 extern int hwm_tx_init(struct s_smc *smc, u_char fc, int frag_count,
144 int frame_len, int frame_status);
145 extern int init_smt(struct s_smc *smc, u_char * mac_addr);
146 extern void fddi_isr(struct s_smc *smc);
147 extern void hwm_rx_frag(struct s_smc *smc, char far * virt, u_long phys,
148 int len, int frame_status);
149 extern void mac_drv_rx_mode(struct s_smc *smc, int mode);
150 extern void mac_drv_clear_rx_queue(struct s_smc *smc);
151 extern void enable_tx_irq(struct s_smc *smc, u_short queue);
152 extern void mac_drv_clear_txd(struct s_smc *smc);
154 static struct pci_device_id skfddi_pci_tbl[] = {
155 { PCI_VENDOR_ID_SK, PCI_DEVICE_ID_SK_FP, PCI_ANY_ID, PCI_ANY_ID, },
156 { } /* Terminating entry */
158 MODULE_DEVICE_TABLE(pci, skfddi_pci_tbl);
159 MODULE_LICENSE("GPL");
160 MODULE_AUTHOR("Mirko Lindner <mlindner@syskonnect.de>");
162 // Define module-wide (static) variables
164 static int num_boards; /* total number of adapters configured */
167 #define PRINTK(s, args...) printk(s, ## args)
169 #define PRINTK(s, args...)
170 #endif // DRIVERDEBUG
172 #define PRIV(dev) (&(((struct s_smc *)dev->priv)->os))
180 * Probes for supported FDDI PCI controllers
186 * pdev - pointer to PCI device information
188 * Functional Description:
189 * This is now called by PCI driver registration process
190 * for each board found.
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
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.
203 static int skfp_init_one(struct pci_dev *pdev,
204 const struct pci_device_id *ent)
206 struct net_device *dev;
207 struct s_smc *smc; /* board pointer */
208 unsigned long port, len;
211 PRINTK(KERN_INFO "entering skfp_init_one\n");
214 printk("%s\n", boot_msg);
216 err = pci_enable_device(pdev);
222 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
223 printk(KERN_ERR "skfp: region is not an MMIO resource\n");
227 port = pci_resource_start(pdev, 0);
228 len = pci_resource_len(pdev, 0);
231 printk(KERN_ERR "skfp: Invalid PCI region size: %lu\n", len);
236 if (!(pci_resource_flags(pdev, 1) & IO_RESOURCE_IO)) {
237 printk(KERN_ERR "skfp: region is not PIO resource\n");
242 port = pci_resource_start(pdev, 1);
243 len = pci_resource_len(pdev, 1);
244 if (len < FP_IO_LEN) {
245 printk(KERN_ERR "skfp: Invalid PCI region size: %d\n",
251 err = pci_request_regions(pdev, "skfddi");
255 pci_set_master(pdev);
257 dev = alloc_fddidev(sizeof(struct s_smc));
259 printk(KERN_ERR "skfp: Unable to allocate fddi device, "
260 "FDDI adapter will be disabled.\n");
266 dev->base_addr = (unsigned long) ioremap(port, len);
267 if (!dev->base_addr) {
268 printk(KERN_ERR "skfp: Unable to map MEMORY register, "
269 "FDDI adapter will be disabled.\n");
274 dev->base_addr = port;
277 dev->irq = pdev->irq;
278 dev->get_stats = &skfp_ctl_get_stats;
279 dev->open = &skfp_open;
280 dev->stop = &skfp_close;
281 dev->hard_start_xmit = &skfp_send_pkt;
282 dev->set_multicast_list = &skfp_ctl_set_multicast_list;
283 dev->set_mac_address = &skfp_ctl_set_mac_address;
284 dev->do_ioctl = &skfp_ioctl;
285 dev->header_cache_update = NULL; /* not supported */
287 SET_MODULE_OWNER(dev);
288 SET_NETDEV_DEV(dev, &pdev->dev);
290 /* Initialize board structure with bus-specific info */
291 smc = (struct s_smc *) dev->priv;
293 smc->os.bus_type = SK_BUS_TYPE_PCI;
294 smc->os.pdev = *pdev;
295 smc->os.QueueSkb = MAX_TX_QUEUE_LEN;
296 smc->os.MaxFrameSize = MAX_FRAME_SIZE;
299 smc->os.ResetRequested = FALSE;
300 skb_queue_head_init(&smc->os.SendSkbQueue);
302 err = skfp_driver_init(dev);
306 err = register_netdev(dev);
311 pci_set_drvdata(pdev, dev);
313 if ((pdev->subsystem_device & 0xff00) == 0x5500 ||
314 (pdev->subsystem_device & 0xff00) == 0x5800)
315 printk("%s: SysKonnect FDDI PCI adapter"
316 " found (SK-%04X)\n", dev->name,
317 pdev->subsystem_device);
319 printk("%s: FDDI PCI adapter found\n", dev->name);
323 if (smc->os.SharedMemAddr)
324 pci_free_consistent(pdev, smc->os.SharedMemSize,
325 smc->os.SharedMemAddr,
326 smc->os.SharedMemDMA);
327 pci_free_consistent(pdev, MAX_FRAME_SIZE,
328 smc->os.LocalRxBuffer, smc->os.LocalRxBufferDMA);
331 iounmap((void *) dev->base_addr);
336 pci_release_regions(pdev);
342 * Called for each adapter board from pci_unregister_driver
344 static void __devexit skfp_remove_one(struct pci_dev *pdev)
346 struct net_device *p = pci_get_drvdata(pdev);
347 struct s_smc *lp = p->priv;
349 unregister_netdev(p);
351 if (lp->os.SharedMemAddr) {
352 pci_free_consistent(&lp->os.pdev,
353 lp->os.SharedMemSize,
354 lp->os.SharedMemAddr,
355 lp->os.SharedMemDMA);
356 lp->os.SharedMemAddr = NULL;
358 if (lp->os.LocalRxBuffer) {
359 pci_free_consistent(&lp->os.pdev,
361 lp->os.LocalRxBuffer,
362 lp->os.LocalRxBufferDMA);
363 lp->os.LocalRxBuffer = NULL;
366 iounmap((void *) p->base_addr);
368 pci_release_regions(pdev);
371 pci_set_drvdata(pdev, NULL);
375 * ====================
376 * = skfp_driver_init =
377 * ====================
380 * Initializes remaining adapter board structure information
381 * and makes sure adapter is in a safe state prior to skfp_open().
387 * dev - pointer to device information
389 * Functional Description:
390 * This function allocates additional resources such as the host memory
391 * blocks needed by the adapter.
392 * The adapter is also reset. The OS must call skfp_open() to open
393 * the adapter and bring it on-line.
396 * 0 - initialization succeeded
397 * -1 - initialization failed
399 static int skfp_driver_init(struct net_device *dev)
401 struct s_smc *smc = (struct s_smc *) dev->priv;
402 skfddi_priv *bp = PRIV(dev);
405 PRINTK(KERN_INFO "entering skfp_driver_init\n");
407 // set the io address in private structures
408 bp->base_addr = dev->base_addr;
409 smc->hw.iop = dev->base_addr;
411 // Get the interrupt level from the PCI Configuration Table
412 smc->hw.irq = dev->irq;
414 spin_lock_init(&bp->DriverLock);
416 // Allocate invalid frame
417 bp->LocalRxBuffer = pci_alloc_consistent(&bp->pdev, MAX_FRAME_SIZE, &bp->LocalRxBufferDMA);
418 if (!bp->LocalRxBuffer) {
419 printk("could not allocate mem for ");
420 printk("LocalRxBuffer: %d byte\n", MAX_FRAME_SIZE);
424 // Determine the required size of the 'shared' memory area.
425 bp->SharedMemSize = mac_drv_check_space();
426 PRINTK(KERN_INFO "Memory for HWM: %ld\n", bp->SharedMemSize);
427 if (bp->SharedMemSize > 0) {
428 bp->SharedMemSize += 16; // for descriptor alignment
430 bp->SharedMemAddr = pci_alloc_consistent(&bp->pdev,
433 if (!bp->SharedMemSize) {
434 printk("could not allocate mem for ");
435 printk("hardware module: %ld byte\n",
439 bp->SharedMemHeap = 0; // Nothing used yet.
442 bp->SharedMemAddr = NULL;
443 bp->SharedMemHeap = 0;
444 } // SharedMemSize > 0
446 memset(bp->SharedMemAddr, 0, bp->SharedMemSize);
448 card_stop(smc); // Reset adapter.
450 PRINTK(KERN_INFO "mac_drv_init()..\n");
451 if (mac_drv_init(smc) != 0) {
452 PRINTK(KERN_INFO "mac_drv_init() failed.\n");
455 read_address(smc, NULL);
456 PRINTK(KERN_INFO "HW-Addr: %02x %02x %02x %02x %02x %02x\n",
457 smc->hw.fddi_canon_addr.a[0],
458 smc->hw.fddi_canon_addr.a[1],
459 smc->hw.fddi_canon_addr.a[2],
460 smc->hw.fddi_canon_addr.a[3],
461 smc->hw.fddi_canon_addr.a[4],
462 smc->hw.fddi_canon_addr.a[5]);
463 memcpy(dev->dev_addr, smc->hw.fddi_canon_addr.a, 6);
465 smt_reset_defaults(smc, 0);
470 if (bp->SharedMemAddr) {
471 pci_free_consistent(&bp->pdev,
475 bp->SharedMemAddr = NULL;
477 if (bp->LocalRxBuffer) {
478 pci_free_consistent(&bp->pdev, MAX_FRAME_SIZE,
479 bp->LocalRxBuffer, bp->LocalRxBufferDMA);
480 bp->LocalRxBuffer = NULL;
483 } // skfp_driver_init
498 * dev - pointer to device information
500 * Functional Description:
501 * This function brings the adapter to an operational state.
504 * 0 - Adapter was successfully opened
505 * -EAGAIN - Could not register IRQ
507 static int skfp_open(struct net_device *dev)
509 struct s_smc *smc = (struct s_smc *) dev->priv;
512 PRINTK(KERN_INFO "entering skfp_open\n");
513 /* Register IRQ - support shared interrupts by passing device ptr */
514 err = request_irq(dev->irq, (void *) skfp_interrupt, SA_SHIRQ,
520 * Set current address to factory MAC address
522 * Note: We've already done this step in skfp_driver_init.
523 * However, it's possible that a user has set a node
524 * address override, then closed and reopened the
525 * adapter. Unless we reset the device address field
526 * now, we'll continue to use the existing modified
529 read_address(smc, NULL);
530 memcpy(dev->dev_addr, smc->hw.fddi_canon_addr.a, 6);
536 /* Clear local multicast address tables */
537 mac_clear_multicast(smc);
539 /* Disable promiscuous filter settings */
540 mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);
542 netif_start_queue(dev);
553 * Closes the device/module.
559 * dev - pointer to device information
561 * Functional Description:
562 * This routine closes the adapter and brings it to a safe state.
563 * The interrupt service routine is deregistered with the OS.
564 * The adapter can be opened again with another call to skfp_open().
570 * No further requests for this adapter are made after this routine is
571 * called. skfp_open() can be called to reset and reinitialize the
574 static int skfp_close(struct net_device *dev)
576 struct s_smc *smc = (struct s_smc *) dev->priv;
577 skfddi_priv *bp = PRIV(dev);
580 smt_reset_defaults(smc, 1);
582 mac_drv_clear_tx_queue(smc);
583 mac_drv_clear_rx_queue(smc);
585 netif_stop_queue(dev);
586 /* Deregister (free) IRQ */
587 free_irq(dev->irq, dev);
589 skb_queue_purge(&bp->SendSkbQueue);
590 bp->QueueSkb = MAX_TX_QUEUE_LEN;
602 * Interrupt processing routine
608 * irq - interrupt vector
609 * dev_id - pointer to device information
610 * regs - pointer to registers structure
612 * Functional Description:
613 * This routine calls the interrupt processing routine for this adapter. It
614 * disables and reenables adapter interrupts, as appropriate. We can support
615 * shared interrupts since the incoming dev_id pointer provides our device
616 * structure context. All the real work is done in the hardware module.
622 * The interrupt acknowledgement at the hardware level (eg. ACKing the PIC
623 * on Intel-based systems) is done by the operating system outside this
626 * System interrupts are enabled through this call.
629 * Interrupts are disabled, then reenabled at the adapter.
632 irqreturn_t skfp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
634 struct net_device *dev = (struct net_device *) dev_id;
635 struct s_smc *smc; /* private board structure pointer */
636 skfddi_priv *bp = PRIV(dev);
640 printk("%s: irq %d for unknown device\n", dev->name, irq);
644 smc = (struct s_smc *) dev->priv;
646 // IRQs enabled or disabled ?
647 if (inpd(ADDR(B0_IMSK)) == 0) {
648 // IRQs are disabled: must be shared interrupt
651 // Note: At this point, IRQs are enabled.
652 if ((inpd(ISR_A) & smc->hw.is_imask) == 0) { // IRQ?
653 // Adapter did not issue an IRQ: must be shared interrupt
656 CLI_FBI(); // Disable IRQs from our adapter.
657 spin_lock(&bp->DriverLock);
659 // Call interrupt handler in hardware module (HWM).
662 if (smc->os.ResetRequested) {
664 smc->os.ResetRequested = FALSE;
666 spin_unlock(&bp->DriverLock);
667 STI_FBI(); // Enable IRQs from our adapter.
674 * ======================
675 * = skfp_ctl_get_stats =
676 * ======================
679 * Get statistics for FDDI adapter
682 * Pointer to FDDI statistics structure
685 * dev - pointer to device information
687 * Functional Description:
688 * Gets current MIB objects from adapter, then
689 * returns FDDI statistics structure as defined
692 * Note: Since the FDDI statistics structure is
693 * still new and the device structure doesn't
694 * have an FDDI-specific get statistics handler,
695 * we'll return the FDDI statistics structure as
696 * a pointer to an Ethernet statistics structure.
697 * That way, at least the first part of the statistics
698 * structure can be decoded properly.
699 * We'll have to pay attention to this routine as the
700 * device structure becomes more mature and LAN media
704 struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev)
706 struct s_smc *bp = (struct s_smc *) dev->priv;
708 /* Fill the bp->stats structure with driver-maintained counters */
710 bp->os.MacStat.port_bs_flag[0] = 0x1234;
711 bp->os.MacStat.port_bs_flag[1] = 0x5678;
712 // goos: need to fill out fddi statistic
714 /* Get FDDI SMT MIB objects */
716 /* Fill the bp->stats structure with the SMT MIB object values */
718 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));
719 bp->stats.smt_op_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_op_version_id;
720 bp->stats.smt_hi_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_hi_version_id;
721 bp->stats.smt_lo_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_lo_version_id;
722 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));
723 bp->stats.smt_mib_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_mib_version_id;
724 bp->stats.smt_mac_cts = bp->cmd_rsp_virt->smt_mib_get.smt_mac_ct;
725 bp->stats.smt_non_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_non_master_ct;
726 bp->stats.smt_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_master_ct;
727 bp->stats.smt_available_paths = bp->cmd_rsp_virt->smt_mib_get.smt_available_paths;
728 bp->stats.smt_config_capabilities = bp->cmd_rsp_virt->smt_mib_get.smt_config_capabilities;
729 bp->stats.smt_config_policy = bp->cmd_rsp_virt->smt_mib_get.smt_config_policy;
730 bp->stats.smt_connection_policy = bp->cmd_rsp_virt->smt_mib_get.smt_connection_policy;
731 bp->stats.smt_t_notify = bp->cmd_rsp_virt->smt_mib_get.smt_t_notify;
732 bp->stats.smt_stat_rpt_policy = bp->cmd_rsp_virt->smt_mib_get.smt_stat_rpt_policy;
733 bp->stats.smt_trace_max_expiration = bp->cmd_rsp_virt->smt_mib_get.smt_trace_max_expiration;
734 bp->stats.smt_bypass_present = bp->cmd_rsp_virt->smt_mib_get.smt_bypass_present;
735 bp->stats.smt_ecm_state = bp->cmd_rsp_virt->smt_mib_get.smt_ecm_state;
736 bp->stats.smt_cf_state = bp->cmd_rsp_virt->smt_mib_get.smt_cf_state;
737 bp->stats.smt_remote_disconnect_flag = bp->cmd_rsp_virt->smt_mib_get.smt_remote_disconnect_flag;
738 bp->stats.smt_station_status = bp->cmd_rsp_virt->smt_mib_get.smt_station_status;
739 bp->stats.smt_peer_wrap_flag = bp->cmd_rsp_virt->smt_mib_get.smt_peer_wrap_flag;
740 bp->stats.smt_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_msg_time_stamp.ls;
741 bp->stats.smt_transition_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_transition_time_stamp.ls;
742 bp->stats.mac_frame_status_functions = bp->cmd_rsp_virt->smt_mib_get.mac_frame_status_functions;
743 bp->stats.mac_t_max_capability = bp->cmd_rsp_virt->smt_mib_get.mac_t_max_capability;
744 bp->stats.mac_tvx_capability = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_capability;
745 bp->stats.mac_available_paths = bp->cmd_rsp_virt->smt_mib_get.mac_available_paths;
746 bp->stats.mac_current_path = bp->cmd_rsp_virt->smt_mib_get.mac_current_path;
747 memcpy(bp->stats.mac_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_upstream_nbr, FDDI_K_ALEN);
748 memcpy(bp->stats.mac_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_downstream_nbr, FDDI_K_ALEN);
749 memcpy(bp->stats.mac_old_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_upstream_nbr, FDDI_K_ALEN);
750 memcpy(bp->stats.mac_old_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_downstream_nbr, FDDI_K_ALEN);
751 bp->stats.mac_dup_address_test = bp->cmd_rsp_virt->smt_mib_get.mac_dup_address_test;
752 bp->stats.mac_requested_paths = bp->cmd_rsp_virt->smt_mib_get.mac_requested_paths;
753 bp->stats.mac_downstream_port_type = bp->cmd_rsp_virt->smt_mib_get.mac_downstream_port_type;
754 memcpy(bp->stats.mac_smt_address, &bp->cmd_rsp_virt->smt_mib_get.mac_smt_address, FDDI_K_ALEN);
755 bp->stats.mac_t_req = bp->cmd_rsp_virt->smt_mib_get.mac_t_req;
756 bp->stats.mac_t_neg = bp->cmd_rsp_virt->smt_mib_get.mac_t_neg;
757 bp->stats.mac_t_max = bp->cmd_rsp_virt->smt_mib_get.mac_t_max;
758 bp->stats.mac_tvx_value = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_value;
759 bp->stats.mac_frame_error_threshold = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_threshold;
760 bp->stats.mac_frame_error_ratio = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_ratio;
761 bp->stats.mac_rmt_state = bp->cmd_rsp_virt->smt_mib_get.mac_rmt_state;
762 bp->stats.mac_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_da_flag;
763 bp->stats.mac_una_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_unda_flag;
764 bp->stats.mac_frame_error_flag = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_flag;
765 bp->stats.mac_ma_unitdata_available = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_available;
766 bp->stats.mac_hardware_present = bp->cmd_rsp_virt->smt_mib_get.mac_hardware_present;
767 bp->stats.mac_ma_unitdata_enable = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_enable;
768 bp->stats.path_tvx_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_tvx_lower_bound;
769 bp->stats.path_t_max_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_t_max_lower_bound;
770 bp->stats.path_max_t_req = bp->cmd_rsp_virt->smt_mib_get.path_max_t_req;
771 memcpy(bp->stats.path_configuration, &bp->cmd_rsp_virt->smt_mib_get.path_configuration, sizeof(bp->cmd_rsp_virt->smt_mib_get.path_configuration));
772 bp->stats.port_my_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[0];
773 bp->stats.port_my_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[1];
774 bp->stats.port_neighbor_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[0];
775 bp->stats.port_neighbor_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[1];
776 bp->stats.port_connection_policies[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[0];
777 bp->stats.port_connection_policies[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[1];
778 bp->stats.port_mac_indicated[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[0];
779 bp->stats.port_mac_indicated[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[1];
780 bp->stats.port_current_path[0] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[0];
781 bp->stats.port_current_path[1] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[1];
782 memcpy(&bp->stats.port_requested_paths[0 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[0], 3);
783 memcpy(&bp->stats.port_requested_paths[1 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[1], 3);
784 bp->stats.port_mac_placement[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[0];
785 bp->stats.port_mac_placement[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[1];
786 bp->stats.port_available_paths[0] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[0];
787 bp->stats.port_available_paths[1] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[1];
788 bp->stats.port_pmd_class[0] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[0];
789 bp->stats.port_pmd_class[1] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[1];
790 bp->stats.port_connection_capabilities[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[0];
791 bp->stats.port_connection_capabilities[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[1];
792 bp->stats.port_bs_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[0];
793 bp->stats.port_bs_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[1];
794 bp->stats.port_ler_estimate[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[0];
795 bp->stats.port_ler_estimate[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[1];
796 bp->stats.port_ler_cutoff[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[0];
797 bp->stats.port_ler_cutoff[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[1];
798 bp->stats.port_ler_alarm[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[0];
799 bp->stats.port_ler_alarm[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[1];
800 bp->stats.port_connect_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[0];
801 bp->stats.port_connect_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[1];
802 bp->stats.port_pcm_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[0];
803 bp->stats.port_pcm_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[1];
804 bp->stats.port_pc_withhold[0] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[0];
805 bp->stats.port_pc_withhold[1] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[1];
806 bp->stats.port_ler_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[0];
807 bp->stats.port_ler_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[1];
808 bp->stats.port_hardware_present[0] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[0];
809 bp->stats.port_hardware_present[1] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[1];
812 /* Fill the bp->stats structure with the FDDI counter values */
814 bp->stats.mac_frame_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.frame_cnt.ls;
815 bp->stats.mac_copied_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.copied_cnt.ls;
816 bp->stats.mac_transmit_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.transmit_cnt.ls;
817 bp->stats.mac_error_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.error_cnt.ls;
818 bp->stats.mac_lost_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.lost_cnt.ls;
819 bp->stats.port_lct_fail_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[0].ls;
820 bp->stats.port_lct_fail_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[1].ls;
821 bp->stats.port_lem_reject_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[0].ls;
822 bp->stats.port_lem_reject_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[1].ls;
823 bp->stats.port_lem_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[0].ls;
824 bp->stats.port_lem_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[1].ls;
827 return ((struct net_device_stats *) &bp->os.MacStat);
832 * ==============================
833 * = skfp_ctl_set_multicast_list =
834 * ==============================
837 * Enable/Disable LLC frame promiscuous mode reception
838 * on the adapter and/or update multicast address table.
844 * dev - pointer to device information
846 * Functional Description:
847 * This function acquires the driver lock and only calls
848 * skfp_ctl_set_multicast_list_wo_lock then.
849 * This routine follows a fairly simple algorithm for setting the
850 * adapter filters and CAM:
852 * if IFF_PROMISC flag is set
853 * enable promiscuous mode
855 * disable promiscuous mode
856 * if number of multicast addresses <= max. multicast number
857 * add mc addresses to adapter table
859 * enable promiscuous mode
860 * update adapter filters
863 * Multicast addresses are presented in canonical (LSB) format.
866 * On-board adapter filters are updated.
868 static void skfp_ctl_set_multicast_list(struct net_device *dev)
870 skfddi_priv *bp = PRIV(dev);
873 spin_lock_irqsave(&bp->DriverLock, Flags);
874 skfp_ctl_set_multicast_list_wo_lock(dev);
875 spin_unlock_irqrestore(&bp->DriverLock, Flags);
877 } // skfp_ctl_set_multicast_list
881 static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev)
883 struct s_smc *smc = (struct s_smc *) dev->priv;
884 struct dev_mc_list *dmi; /* ptr to multicast addr entry */
887 /* Enable promiscuous mode, if necessary */
888 if (dev->flags & IFF_PROMISC) {
889 mac_drv_rx_mode(smc, RX_ENABLE_PROMISC);
890 PRINTK(KERN_INFO "PROMISCUOUS MODE ENABLED\n");
892 /* Else, update multicast address table */
894 mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);
895 PRINTK(KERN_INFO "PROMISCUOUS MODE DISABLED\n");
897 // Reset all MC addresses
898 mac_clear_multicast(smc);
899 mac_drv_rx_mode(smc, RX_DISABLE_ALLMULTI);
901 if (dev->flags & IFF_ALLMULTI) {
902 mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI);
903 PRINTK(KERN_INFO "ENABLE ALL MC ADDRESSES\n");
904 } else if (dev->mc_count > 0) {
905 if (dev->mc_count <= FPMAX_MULTICAST) {
906 /* use exact filtering */
908 // point to first multicast addr
911 for (i = 0; i < dev->mc_count; i++) {
912 mac_add_multicast(smc,
913 (struct fddi_addr *)dmi->dmi_addr,
916 PRINTK(KERN_INFO "ENABLE MC ADDRESS:");
917 PRINTK(" %02x %02x %02x ",
921 PRINTK("%02x %02x %02x\n",
928 } else { // more MC addresses than HW supports
930 mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI);
931 PRINTK(KERN_INFO "ENABLE ALL MC ADDRESSES\n");
933 } else { // no MC addresses
935 PRINTK(KERN_INFO "DISABLE ALL MC ADDRESSES\n");
938 /* Update adapter filters */
939 mac_update_multicast(smc);
942 } // skfp_ctl_set_multicast_list_wo_lock
946 * ===========================
947 * = skfp_ctl_set_mac_address =
948 * ===========================
951 * set new mac address on adapter and update dev_addr field in device table.
957 * dev - pointer to device information
958 * addr - pointer to sockaddr structure containing unicast address to set
961 * The address pointed to by addr->sa_data is a valid unicast
962 * address and is presented in canonical (LSB) format.
964 static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr)
966 struct s_smc *smc = (struct s_smc *) dev->priv;
967 struct sockaddr *p_sockaddr = (struct sockaddr *) addr;
968 skfddi_priv *bp = (skfddi_priv *) & smc->os;
972 memcpy(dev->dev_addr, p_sockaddr->sa_data, FDDI_K_ALEN);
973 spin_lock_irqsave(&bp->DriverLock, Flags);
975 spin_unlock_irqrestore(&bp->DriverLock, Flags);
977 return (0); /* always return zero */
978 } // skfp_ctl_set_mac_address
988 * Perform IOCTL call functions here. Some are privileged operations and the
989 * effective uid is checked in those cases.
997 * dev - pointer to device information
998 * rq - pointer to ioctl request structure
1004 static int skfp_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1006 skfddi_priv *lp = PRIV(dev);
1007 struct s_skfp_ioctl ioc;
1010 if (copy_from_user(&ioc, rq->ifr_data, sizeof(struct s_skfp_ioctl)))
1013 case SKFP_GET_STATS: /* Get the driver statistics */
1014 ioc.len = sizeof(lp->MacStat);
1015 status = copy_to_user(ioc.data, skfp_ctl_get_stats(dev), ioc.len)
1018 case SKFP_CLR_STATS: /* Zero out the driver statistics */
1019 if (!capable(CAP_NET_ADMIN)) {
1020 memset(&lp->MacStat, 0, sizeof(lp->MacStat));
1026 printk("ioctl for %s: unknow cmd: %04x\n", dev->name, ioc.cmd);
1027 status = -EOPNOTSUPP;
1036 * =====================
1038 * =====================
1041 * Queues a packet for transmission and try to transmit it.
1047 * skb - pointer to sk_buff to queue for transmission
1048 * dev - pointer to device information
1050 * Functional Description:
1051 * Here we assume that an incoming skb transmit request
1052 * is contained in a single physically contiguous buffer
1053 * in which the virtual address of the start of packet
1054 * (skb->data) can be converted to a physical address
1055 * by using pci_map_single().
1057 * We have an internal queue for packets we can not send
1058 * immediately. Packets in this queue can be given to the
1059 * adapter if transmit buffers are freed.
1061 * We can't free the skb until after it's been DMA'd
1062 * out by the adapter, so we'll keep it in the driver and
1063 * return it in mac_drv_tx_complete.
1066 * 0 - driver has queued and/or sent packet
1067 * 1 - caller should requeue the sk_buff for later transmission
1070 * The entire packet is stored in one physically
1071 * contiguous buffer which is not cached and whose
1072 * 32-bit physical address can be determined.
1074 * It's vital that this routine is NOT reentered for the
1075 * same board and that the OS is not in another section of
1076 * code (eg. skfp_interrupt) for the same board on a
1082 static int skfp_send_pkt(struct sk_buff *skb, struct net_device *dev)
1084 skfddi_priv *bp = PRIV(dev);
1086 PRINTK(KERN_INFO "skfp_send_pkt\n");
1089 * Verify that incoming transmit request is OK
1091 * Note: The packet size check is consistent with other
1092 * Linux device drivers, although the correct packet
1093 * size should be verified before calling the
1097 if (!(skb->len >= FDDI_K_LLC_ZLEN && skb->len <= FDDI_K_LLC_LEN)) {
1098 bp->MacStat.gen.tx_errors++; /* bump error counter */
1099 // dequeue packets from xmt queue and send them
1100 netif_start_queue(dev);
1102 return (0); /* return "success" */
1104 if (bp->QueueSkb == 0) { // return with tbusy set: queue full
1106 netif_stop_queue(dev);
1110 skb_queue_tail(&bp->SendSkbQueue, skb);
1111 send_queued_packets((struct s_smc *) dev->priv);
1112 if (bp->QueueSkb == 0) {
1113 netif_stop_queue(dev);
1115 dev->trans_start = jiffies;
1122 * =======================
1123 * = send_queued_packets =
1124 * =======================
1127 * Send packets from the driver queue as long as there are some and
1128 * transmit resources are available.
1134 * smc - pointer to smc (adapter) structure
1136 * Functional Description:
1137 * Take a packet from queue if there is any. If not, then we are done.
1138 * Check if there are resources to send the packet. If not, requeue it
1140 * Set packet descriptor flags and give packet to adapter.
1141 * Check if any send resources can be freed (we do not use the
1142 * transmit complete interrupt).
1144 static void send_queued_packets(struct s_smc *smc)
1146 skfddi_priv *bp = (skfddi_priv *) & smc->os;
1147 struct sk_buff *skb;
1150 struct s_smt_fp_txd *txd; // Current TxD.
1151 dma_addr_t dma_address;
1152 unsigned long Flags;
1154 int frame_status; // HWM tx frame status.
1156 PRINTK(KERN_INFO "send queued packets\n");
1158 // send first buffer from queue
1159 skb = skb_dequeue(&bp->SendSkbQueue);
1162 PRINTK(KERN_INFO "queue empty\n");
1166 spin_lock_irqsave(&bp->DriverLock, Flags);
1168 queue = (fc & FC_SYNC_BIT) ? QUEUE_S : QUEUE_A0;
1170 // Check if the frame may/must be sent as a synchronous frame.
1172 if ((fc & ~(FC_SYNC_BIT | FC_LLC_PRIOR)) == FC_ASYNC_LLC) {
1173 // It's an LLC frame.
1174 if (!smc->ess.sync_bw_available)
1175 fc &= ~FC_SYNC_BIT; // No bandwidth available.
1177 else { // Bandwidth is available.
1179 if (smc->mib.fddiESSSynchTxMode) {
1180 // Send as sync. frame.
1186 frame_status = hwm_tx_init(smc, fc, 1, skb->len, queue);
1188 if ((frame_status & (LOC_TX | LAN_TX)) == 0) {
1189 // Unable to send the frame.
1191 if ((frame_status & RING_DOWN) != 0) {
1193 PRINTK("Tx attempt while ring down.\n");
1194 } else if ((frame_status & OUT_OF_TXD) != 0) {
1195 PRINTK("%s: out of TXDs.\n", bp->dev->name);
1197 PRINTK("%s: out of transmit resources",
1201 // Note: We will retry the operation as soon as
1202 // transmit resources become available.
1203 skb_queue_head(&bp->SendSkbQueue, skb);
1204 spin_unlock_irqrestore(&bp->DriverLock, Flags);
1205 return; // Packet has been queued.
1207 } // if (unable to send frame)
1209 bp->QueueSkb++; // one packet less in local queue
1211 // source address in packet ?
1212 CheckSourceAddress(skb->data, smc->hw.fddi_canon_addr.a);
1214 txd = (struct s_smt_fp_txd *) HWM_GET_CURR_TXD(smc, queue);
1216 dma_address = pci_map_single(&bp->pdev, skb->data,
1217 skb->len, PCI_DMA_TODEVICE);
1218 if (frame_status & LAN_TX) {
1219 txd->txd_os.skb = skb; // save skb
1220 txd->txd_os.dma_addr = dma_address; // save dma mapping
1222 hwm_tx_frag(smc, skb->data, dma_address, skb->len,
1223 frame_status | FIRST_FRAG | LAST_FRAG | EN_IRQ_EOF);
1225 if (!(frame_status & LAN_TX)) { // local only frame
1226 pci_unmap_single(&bp->pdev, dma_address,
1227 skb->len, PCI_DMA_TODEVICE);
1228 dev_kfree_skb_irq(skb);
1230 spin_unlock_irqrestore(&bp->DriverLock, Flags);
1233 return; // never reached
1235 } // send_queued_packets
1238 /************************
1240 * CheckSourceAddress
1242 * Verify if the source address is set. Insert it if necessary.
1244 ************************/
1245 void CheckSourceAddress(unsigned char *frame, unsigned char *hw_addr)
1247 unsigned char SRBit;
1249 if ((((unsigned long) frame[1 + 6]) & ~0x01) != 0) // source routing bit
1252 if ((unsigned short) frame[1 + 10] != 0)
1254 SRBit = frame[1 + 6] & 0x01;
1255 memcpy(&frame[1 + 6], hw_addr, 6);
1257 } // CheckSourceAddress
1260 /************************
1264 * Reset the adapter and bring it back to operational mode.
1266 * smc - A pointer to the SMT context struct.
1270 ************************/
1271 static void ResetAdapter(struct s_smc *smc)
1274 PRINTK(KERN_INFO "[fddi: ResetAdapter]\n");
1276 // Stop the adapter.
1278 card_stop(smc); // Stop all activity.
1280 // Clear the transmit and receive descriptor queues.
1281 mac_drv_clear_tx_queue(smc);
1282 mac_drv_clear_rx_queue(smc);
1284 // Restart the adapter.
1286 smt_reset_defaults(smc, 1); // Initialize the SMT module.
1288 init_smt(smc, (smc->os.dev)->dev_addr); // Initialize the hardware.
1290 smt_online(smc, 1); // Insert into the ring again.
1293 // Restore original receive mode (multicasts, promiscuous, etc.).
1294 skfp_ctl_set_multicast_list_wo_lock(smc->os.dev);
1298 //--------------- functions called by hardware module ----------------
1300 /************************
1304 * The hardware driver calls this routine when the transmit complete
1305 * interrupt bits (end of frame) for the synchronous or asynchronous
1308 * NOTE The hardware driver calls this function also if no packets are queued.
1309 * The routine must be able to handle this case.
1311 * smc - A pointer to the SMT context struct.
1315 ************************/
1316 void llc_restart_tx(struct s_smc *smc)
1318 skfddi_priv *bp = (skfddi_priv *) & smc->os;
1320 PRINTK(KERN_INFO "[llc_restart_tx]\n");
1322 // Try to send queued packets
1323 spin_unlock(&bp->DriverLock);
1324 send_queued_packets(smc);
1325 spin_lock(&bp->DriverLock);
1326 netif_start_queue(bp->dev);// system may send again if it was blocked
1331 /************************
1335 * The hardware module calls this function to allocate the memory
1336 * for the SMT MBufs if the define MB_OUTSIDE_SMC is specified.
1338 * smc - A pointer to the SMT context struct.
1340 * size - Size of memory in bytes to allocate.
1342 * != 0 A pointer to the virtual address of the allocated memory.
1343 * == 0 Allocation error.
1345 ************************/
1346 void *mac_drv_get_space(struct s_smc *smc, unsigned int size)
1350 PRINTK(KERN_INFO "mac_drv_get_space (%d bytes), ", size);
1351 virt = (void *) (smc->os.SharedMemAddr + smc->os.SharedMemHeap);
1353 if ((smc->os.SharedMemHeap + size) > smc->os.SharedMemSize) {
1354 printk("Unexpected SMT memory size requested: %d\n", size);
1357 smc->os.SharedMemHeap += size; // Move heap pointer.
1359 PRINTK(KERN_INFO "mac_drv_get_space end\n");
1360 PRINTK(KERN_INFO "virt addr: %lx\n", (ulong) virt);
1361 PRINTK(KERN_INFO "bus addr: %lx\n", (ulong)
1362 (smc->os.SharedMemDMA +
1363 ((char *) virt - (char *)smc->os.SharedMemAddr)));
1365 } // mac_drv_get_space
1368 /************************
1370 * mac_drv_get_desc_mem
1372 * This function is called by the hardware dependent module.
1373 * It allocates the memory for the RxD and TxD descriptors.
1375 * This memory must be non-cached, non-movable and non-swappable.
1376 * This memory should start at a physical page boundary.
1378 * smc - A pointer to the SMT context struct.
1380 * size - Size of memory in bytes to allocate.
1382 * != 0 A pointer to the virtual address of the allocated memory.
1383 * == 0 Allocation error.
1385 ************************/
1386 void *mac_drv_get_desc_mem(struct s_smc *smc, unsigned int size)
1391 PRINTK(KERN_INFO "mac_drv_get_desc_mem\n");
1393 // Descriptor memory must be aligned on 16-byte boundary.
1395 virt = mac_drv_get_space(smc, size);
1397 size = (u_int) (16 - (((unsigned long) virt) & 15UL));
1400 PRINTK("Allocate %u bytes alignment gap ", size);
1401 PRINTK("for descriptor memory.\n");
1403 if (!mac_drv_get_space(smc, size)) {
1404 printk("fddi: Unable to align descriptor memory.\n");
1407 return (virt + size);
1408 } // mac_drv_get_desc_mem
1411 /************************
1415 * Get the physical address of a given virtual address.
1417 * smc - A pointer to the SMT context struct.
1419 * virt - A (virtual) pointer into our 'shared' memory area.
1421 * Physical address of the given virtual address.
1423 ************************/
1424 unsigned long mac_drv_virt2phys(struct s_smc *smc, void *virt)
1426 return (smc->os.SharedMemDMA +
1427 ((char *) virt - (char *)smc->os.SharedMemAddr));
1428 } // mac_drv_virt2phys
1431 /************************
1435 * The HWM calls this function, when the driver leads through a DMA
1436 * transfer. If the OS-specific module must prepare the system hardware
1437 * for the DMA transfer, it should do it in this function.
1439 * The hardware module calls this dma_master if it wants to send an SMT
1440 * frame. This means that the virt address passed in here is part of
1441 * the 'shared' memory area.
1443 * smc - A pointer to the SMT context struct.
1445 * virt - The virtual address of the data.
1447 * len - The length in bytes of the data.
1449 * flag - Indicates the transmit direction and the buffer type:
1450 * DMA_RD (0x01) system RAM ==> adapter buffer memory
1451 * DMA_WR (0x02) adapter buffer memory ==> system RAM
1452 * SMT_BUF (0x80) SMT buffer
1454 * >> NOTE: SMT_BUF and DMA_RD are always set for PCI. <<
1456 * Returns the pyhsical address for the DMA transfer.
1458 ************************/
1459 u_long dma_master(struct s_smc * smc, void *virt, int len, int flag)
1461 return (smc->os.SharedMemDMA +
1462 ((char *) virt - (char *)smc->os.SharedMemAddr));
1466 /************************
1470 * The hardware module calls this routine when it has completed a DMA
1471 * transfer. If the operating system dependent module has set up the DMA
1472 * channel via dma_master() (e.g. Windows NT or AIX) it should clean up
1475 * smc - A pointer to the SMT context struct.
1477 * descr - A pointer to a TxD or RxD, respectively.
1479 * flag - Indicates the DMA transfer direction / SMT buffer:
1480 * DMA_RD (0x01) system RAM ==> adapter buffer memory
1481 * DMA_WR (0x02) adapter buffer memory ==> system RAM
1482 * SMT_BUF (0x80) SMT buffer (managed by HWM)
1486 ************************/
1487 void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr, int flag)
1489 /* For TX buffers, there are two cases. If it is an SMT transmit
1490 * buffer, there is nothing to do since we use consistent memory
1491 * for the 'shared' memory area. The other case is for normal
1492 * transmit packets given to us by the networking stack, and in
1493 * that case we cleanup the PCI DMA mapping in mac_drv_tx_complete
1496 * For RX buffers, we have to unmap dynamic PCI DMA mappings here
1497 * because the hardware module is about to potentially look at
1498 * the contents of the buffer. If we did not call the PCI DMA
1499 * unmap first, the hardware module could read inconsistent data.
1501 if (flag & DMA_WR) {
1502 skfddi_priv *bp = (skfddi_priv *) & smc->os;
1503 volatile struct s_smt_fp_rxd *r = &descr->r;
1505 /* If SKB is NULL, we used the local buffer. */
1506 if (r->rxd_os.skb && r->rxd_os.dma_addr) {
1507 int MaxFrameSize = bp->MaxFrameSize;
1509 pci_unmap_single(&bp->pdev, r->rxd_os.dma_addr,
1510 MaxFrameSize, PCI_DMA_FROMDEVICE);
1511 r->rxd_os.dma_addr = 0;
1517 /************************
1519 * mac_drv_tx_complete
1521 * Transmit of a packet is complete. Release the tx staging buffer.
1524 * smc - A pointer to the SMT context struct.
1526 * txd - A pointer to the last TxD which is used by the frame.
1530 ************************/
1531 void mac_drv_tx_complete(struct s_smc *smc, volatile struct s_smt_fp_txd *txd)
1533 struct sk_buff *skb;
1535 PRINTK(KERN_INFO "entering mac_drv_tx_complete\n");
1536 // Check if this TxD points to a skb
1538 if (!(skb = txd->txd_os.skb)) {
1539 PRINTK("TXD with no skb assigned.\n");
1542 txd->txd_os.skb = NULL;
1544 // release the DMA mapping
1545 pci_unmap_single(&smc->os.pdev, txd->txd_os.dma_addr,
1546 skb->len, PCI_DMA_TODEVICE);
1547 txd->txd_os.dma_addr = 0;
1549 smc->os.MacStat.gen.tx_packets++; // Count transmitted packets.
1550 smc->os.MacStat.gen.tx_bytes+=skb->len; // Count bytes
1553 dev_kfree_skb_irq(skb);
1555 PRINTK(KERN_INFO "leaving mac_drv_tx_complete\n");
1556 } // mac_drv_tx_complete
1559 /************************
1561 * dump packets to logfile
1563 ************************/
1565 void dump_data(unsigned char *Data, int length)
1568 unsigned char s[255], sh[10];
1572 printk(KERN_INFO "---Packet start---\n");
1573 for (i = 0, j = 0; i < length / 8; i++, j += 8)
1574 printk(KERN_INFO "%02x %02x %02x %02x %02x %02x %02x %02x\n",
1575 Data[j + 0], Data[j + 1], Data[j + 2], Data[j + 3],
1576 Data[j + 4], Data[j + 5], Data[j + 6], Data[j + 7]);
1578 for (i = 0; i < length % 8; i++) {
1579 sprintf(sh, "%02x ", Data[j + i]);
1582 printk(KERN_INFO "%s\n", s);
1583 printk(KERN_INFO "------------------\n");
1586 #define dump_data(data,len)
1587 #endif // DUMPPACKETS
1589 /************************
1591 * mac_drv_rx_complete
1593 * The hardware module calls this function if an LLC frame is received
1594 * in a receive buffer. Also the SMT, NSA, and directed beacon frames
1595 * from the network will be passed to the LLC layer by this function
1596 * if passing is enabled.
1598 * mac_drv_rx_complete forwards the frame to the LLC layer if it should
1599 * be received. It also fills the RxD ring with new receive buffers if
1600 * some can be queued.
1602 * smc - A pointer to the SMT context struct.
1604 * rxd - A pointer to the first RxD which is used by the receive frame.
1606 * frag_count - Count of RxDs used by the received frame.
1608 * len - Frame length.
1612 ************************/
1613 void mac_drv_rx_complete(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
1614 int frag_count, int len)
1616 skfddi_priv *bp = (skfddi_priv *) & smc->os;
1617 struct sk_buff *skb;
1618 unsigned char *virt, *cp;
1622 PRINTK(KERN_INFO "entering mac_drv_rx_complete (len=%d)\n", len);
1623 if (frag_count != 1) { // This is not allowed to happen.
1625 printk("fddi: Multi-fragment receive!\n");
1626 goto RequeueRxd; // Re-use the given RXD(s).
1629 skb = rxd->rxd_os.skb;
1631 PRINTK(KERN_INFO "No skb in rxd\n");
1632 smc->os.MacStat.gen.rx_errors++;
1637 // The DMA mapping was released in dma_complete above.
1639 dump_data(skb->data, len);
1642 * FDDI Frame format:
1643 * +-------+-------+-------+------------+--------+------------+
1644 * | FC[1] | DA[6] | SA[6] | RIF[0..18] | LLC[3] | Data[0..n] |
1645 * +-------+-------+-------+------------+--------+------------+
1647 * FC = Frame Control
1648 * DA = Destination Address
1649 * SA = Source Address
1650 * RIF = Routing Information Field
1651 * LLC = Logical Link Control
1654 // Remove Routing Information Field (RIF), if present.
1656 if ((virt[1 + 6] & FDDI_RII) == 0)
1660 // goos: RIF removal has still to be tested
1661 PRINTK(KERN_INFO "RIF found\n");
1662 // Get RIF length from Routing Control (RC) field.
1663 cp = virt + FDDI_MAC_HDR_LEN; // Point behind MAC header.
1665 ri = ntohs(*((unsigned short *) cp));
1666 RifLength = ri & FDDI_RCF_LEN_MASK;
1667 if (len < (int) (FDDI_MAC_HDR_LEN + RifLength)) {
1668 printk("fddi: Invalid RIF.\n");
1669 goto RequeueRxd; // Discard the frame.
1672 virt[1 + 6] &= ~FDDI_RII; // Clear RII bit.
1675 virt = cp + RifLength;
1676 for (n = FDDI_MAC_HDR_LEN; n; n--)
1678 // adjust sbd->data pointer
1679 skb_pull(skb, RifLength);
1684 // Count statistics.
1685 smc->os.MacStat.gen.rx_packets++; // Count indicated receive
1687 smc->os.MacStat.gen.rx_bytes+=len; // Count bytes.
1689 // virt points to header again
1690 if (virt[1] & 0x01) { // Check group (multicast) bit.
1692 smc->os.MacStat.gen.multicast++;
1695 // deliver frame to system
1696 rxd->rxd_os.skb = NULL;
1698 skb->protocol = fddi_type_trans(skb, bp->dev);
1699 skb->dev = bp->dev; /* pass up device pointer */
1702 bp->dev->last_rx = jiffies;
1704 HWM_RX_CHECK(smc, RX_LOW_WATERMARK);
1708 PRINTK(KERN_INFO "Rx: re-queue RXD.\n");
1709 mac_drv_requeue_rxd(smc, rxd, frag_count);
1710 smc->os.MacStat.gen.rx_errors++; // Count receive packets
1713 } // mac_drv_rx_complete
1716 /************************
1718 * mac_drv_requeue_rxd
1720 * The hardware module calls this function to request the OS-specific
1721 * module to queue the receive buffer(s) represented by the pointer
1722 * to the RxD and the frag_count into the receive queue again. This
1723 * buffer was filled with an invalid frame or an SMT frame.
1725 * smc - A pointer to the SMT context struct.
1727 * rxd - A pointer to the first RxD which is used by the receive frame.
1729 * frag_count - Count of RxDs used by the received frame.
1733 ************************/
1734 void mac_drv_requeue_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
1737 volatile struct s_smt_fp_rxd *next_rxd;
1738 volatile struct s_smt_fp_rxd *src_rxd;
1739 struct sk_buff *skb;
1741 unsigned char *v_addr;
1744 if (frag_count != 1) // This is not allowed to happen.
1746 printk("fddi: Multi-fragment requeue!\n");
1748 MaxFrameSize = ((skfddi_priv *) & smc->os)->MaxFrameSize;
1750 for (; frag_count > 0; frag_count--) {
1751 next_rxd = src_rxd->rxd_next;
1752 rxd = HWM_GET_CURR_RXD(smc);
1754 skb = src_rxd->rxd_os.skb;
1755 if (skb == NULL) { // this should not happen
1757 PRINTK("Requeue with no skb in rxd!\n");
1758 skb = alloc_skb(MaxFrameSize + 3, GFP_ATOMIC);
1761 rxd->rxd_os.skb = skb;
1762 skb_reserve(skb, 3);
1763 skb_put(skb, MaxFrameSize);
1765 b_addr = pci_map_single(&smc->os.pdev,
1768 PCI_DMA_FROMDEVICE);
1769 rxd->rxd_os.dma_addr = b_addr;
1771 // no skb available, use local buffer
1772 PRINTK("Queueing invalid buffer!\n");
1773 rxd->rxd_os.skb = NULL;
1774 v_addr = smc->os.LocalRxBuffer;
1775 b_addr = smc->os.LocalRxBufferDMA;
1778 // we use skb from old rxd
1779 rxd->rxd_os.skb = skb;
1781 b_addr = pci_map_single(&smc->os.pdev,
1784 PCI_DMA_FROMDEVICE);
1785 rxd->rxd_os.dma_addr = b_addr;
1787 hwm_rx_frag(smc, v_addr, b_addr, MaxFrameSize,
1788 FIRST_FRAG | LAST_FRAG);
1792 } // mac_drv_requeue_rxd
1795 /************************
1799 * The hardware module calls this function at initialization time
1800 * to fill the RxD ring with receive buffers. It is also called by
1801 * mac_drv_rx_complete if rx_free is large enough to queue some new
1802 * receive buffers into the RxD ring. mac_drv_fill_rxd queues new
1803 * receive buffers as long as enough RxDs and receive buffers are
1806 * smc - A pointer to the SMT context struct.
1810 ************************/
1811 void mac_drv_fill_rxd(struct s_smc *smc)
1814 unsigned char *v_addr;
1815 unsigned long b_addr;
1816 struct sk_buff *skb;
1817 volatile struct s_smt_fp_rxd *rxd;
1819 PRINTK(KERN_INFO "entering mac_drv_fill_rxd\n");
1821 // Walk through the list of free receive buffers, passing receive
1822 // buffers to the HWM as long as RXDs are available.
1824 MaxFrameSize = ((skfddi_priv *) & smc->os)->MaxFrameSize;
1825 // Check if there is any RXD left.
1826 while (HWM_GET_RX_FREE(smc) > 0) {
1827 PRINTK(KERN_INFO ".\n");
1829 rxd = HWM_GET_CURR_RXD(smc);
1830 skb = alloc_skb(MaxFrameSize + 3, GFP_ATOMIC);
1833 skb_reserve(skb, 3);
1834 skb_put(skb, MaxFrameSize);
1836 b_addr = pci_map_single(&smc->os.pdev,
1839 PCI_DMA_FROMDEVICE);
1840 rxd->rxd_os.dma_addr = b_addr;
1842 // no skb available, use local buffer
1843 // System has run out of buffer memory, but we want to
1844 // keep the receiver running in hope of better times.
1845 // Multiple descriptors may point to this local buffer,
1846 // so data in it must be considered invalid.
1847 PRINTK("Queueing invalid buffer!\n");
1848 v_addr = smc->os.LocalRxBuffer;
1849 b_addr = smc->os.LocalRxBufferDMA;
1852 rxd->rxd_os.skb = skb;
1854 // Pass receive buffer to HWM.
1855 hwm_rx_frag(smc, v_addr, b_addr, MaxFrameSize,
1856 FIRST_FRAG | LAST_FRAG);
1858 PRINTK(KERN_INFO "leaving mac_drv_fill_rxd\n");
1859 } // mac_drv_fill_rxd
1862 /************************
1866 * The hardware module calls this function to release unused
1869 * smc - A pointer to the SMT context struct.
1871 * rxd - A pointer to the first RxD which is used by the receive buffer.
1873 * frag_count - Count of RxDs used by the receive buffer.
1877 ************************/
1878 void mac_drv_clear_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
1882 struct sk_buff *skb;
1884 PRINTK("entering mac_drv_clear_rxd\n");
1886 if (frag_count != 1) // This is not allowed to happen.
1888 printk("fddi: Multi-fragment clear!\n");
1890 for (; frag_count > 0; frag_count--) {
1891 skb = rxd->rxd_os.skb;
1893 skfddi_priv *bp = (skfddi_priv *) & smc->os;
1894 int MaxFrameSize = bp->MaxFrameSize;
1896 pci_unmap_single(&bp->pdev, rxd->rxd_os.dma_addr,
1897 MaxFrameSize, PCI_DMA_FROMDEVICE);
1900 rxd->rxd_os.skb = NULL;
1902 rxd = rxd->rxd_next; // Next RXD.
1905 } // mac_drv_clear_rxd
1908 /************************
1912 * The hardware module calls this routine when an SMT or NSA frame of the
1913 * local SMT should be delivered to the LLC layer.
1915 * It is necessary to have this function, because there is no other way to
1916 * copy the contents of SMT MBufs into receive buffers.
1918 * mac_drv_rx_init allocates the required target memory for this frame,
1919 * and receives the frame fragment by fragment by calling mac_drv_rx_frag.
1921 * smc - A pointer to the SMT context struct.
1923 * len - The length (in bytes) of the received frame (FC, DA, SA, Data).
1925 * fc - The Frame Control field of the received frame.
1927 * look_ahead - A pointer to the lookahead data buffer (may be NULL).
1929 * la_len - The length of the lookahead data stored in the lookahead
1930 * buffer (may be zero).
1932 * Always returns zero (0).
1934 ************************/
1935 int mac_drv_rx_init(struct s_smc *smc, int len, int fc,
1936 char *look_ahead, int la_len)
1938 struct sk_buff *skb;
1940 PRINTK("entering mac_drv_rx_init(len=%d)\n", len);
1942 // "Received" a SMT or NSA frame of the local SMT.
1944 if (len != la_len || len < FDDI_MAC_HDR_LEN || !look_ahead) {
1945 PRINTK("fddi: Discard invalid local SMT frame\n");
1946 PRINTK(" len=%d, la_len=%d, (ULONG) look_ahead=%08lXh.\n",
1947 len, la_len, (unsigned long) look_ahead);
1950 skb = alloc_skb(len + 3, GFP_ATOMIC);
1952 PRINTK("fddi: Local SMT: skb memory exhausted.\n");
1955 skb_reserve(skb, 3);
1957 memcpy(skb->data, look_ahead, len);
1959 // deliver frame to system
1960 skb->protocol = fddi_type_trans(skb, ((skfddi_priv *) & smc->os)->dev);
1961 skb->dev->last_rx = jiffies;
1965 } // mac_drv_rx_init
1968 /************************
1972 * This routine is called periodically by the SMT module to clean up the
1975 * Return any queued frames back to the upper protocol layers if the ring
1978 * smc - A pointer to the SMT context struct.
1982 ************************/
1983 void smt_timer_poll(struct s_smc *smc)
1988 /************************
1990 * ring_status_indication
1992 * This function indicates a change of the ring state.
1994 * smc - A pointer to the SMT context struct.
1996 * status - The current ring status.
2000 ************************/
2001 void ring_status_indication(struct s_smc *smc, u_long status)
2003 PRINTK("ring_status_indication( ");
2004 if (status & RS_RES15)
2005 PRINTK("RS_RES15 ");
2006 if (status & RS_HARDERROR)
2007 PRINTK("RS_HARDERROR ");
2008 if (status & RS_SOFTERROR)
2009 PRINTK("RS_SOFTERROR ");
2010 if (status & RS_BEACON)
2011 PRINTK("RS_BEACON ");
2012 if (status & RS_PATHTEST)
2013 PRINTK("RS_PATHTEST ");
2014 if (status & RS_SELFTEST)
2015 PRINTK("RS_SELFTEST ");
2016 if (status & RS_RES9)
2018 if (status & RS_DISCONNECT)
2019 PRINTK("RS_DISCONNECT ");
2020 if (status & RS_RES7)
2022 if (status & RS_DUPADDR)
2023 PRINTK("RS_DUPADDR ");
2024 if (status & RS_NORINGOP)
2025 PRINTK("RS_NORINGOP ");
2026 if (status & RS_VERSION)
2027 PRINTK("RS_VERSION ");
2028 if (status & RS_STUCKBYPASSS)
2029 PRINTK("RS_STUCKBYPASSS ");
2030 if (status & RS_EVENT)
2031 PRINTK("RS_EVENT ");
2032 if (status & RS_RINGOPCHANGE)
2033 PRINTK("RS_RINGOPCHANGE ");
2034 if (status & RS_RES0)
2037 } // ring_status_indication
2040 /************************
2044 * Gets the current time from the system.
2048 * The current time in TICKS_PER_SECOND.
2050 * TICKS_PER_SECOND has the unit 'count of timer ticks per second'. It is
2051 * defined in "targetos.h". The definition of TICKS_PER_SECOND must comply
2052 * to the time returned by smt_get_time().
2054 ************************/
2055 unsigned long smt_get_time(void)
2061 /************************
2065 * Status counter update (ring_op, fifo full).
2067 * smc - A pointer to the SMT context struct.
2069 * stat - = 0: A ring operational change occurred.
2070 * = 1: The FORMAC FIFO buffer is full / FIFO overflow.
2074 ************************/
2075 void smt_stat_counter(struct s_smc *smc, int stat)
2077 // BOOLEAN RingIsUp ;
2079 PRINTK(KERN_INFO "smt_stat_counter\n");
2082 PRINTK(KERN_INFO "Ring operational change.\n");
2085 PRINTK(KERN_INFO "Receive fifo overflow.\n");
2086 smc->os.MacStat.gen.rx_errors++;
2089 PRINTK(KERN_INFO "Unknown status (%d).\n", stat);
2092 } // smt_stat_counter
2095 /************************
2099 * Sets CFM state in custom statistics.
2101 * smc - A pointer to the SMT context struct.
2103 * c_state - Possible values are:
2105 * EC0_OUT, EC1_IN, EC2_TRACE, EC3_LEAVE, EC4_PATH_TEST,
2106 * EC5_INSERT, EC6_CHECK, EC7_DEINSERT
2110 ************************/
2111 void cfm_state_change(struct s_smc *smc, int c_state)
2139 s = "SC10_C_WRAP_B";
2142 s = "SC11_C_WRAP_S";
2145 PRINTK(KERN_INFO "cfm_state_change: unknown %d\n", c_state);
2148 PRINTK(KERN_INFO "cfm_state_change: %s\n", s);
2149 #endif // DRIVERDEBUG
2150 } // cfm_state_change
2153 /************************
2157 * Sets ECM state in custom statistics.
2159 * smc - A pointer to the SMT context struct.
2161 * e_state - Possible values are:
2163 * SC0_ISOLATED, SC1_WRAP_A (5), SC2_WRAP_B (6), SC4_THRU_A (12),
2164 * SC5_THRU_B (7), SC7_WRAP_S (8)
2168 ************************/
2169 void ecm_state_change(struct s_smc *smc, int e_state)
2188 s = "EC4_PATH_TEST";
2203 PRINTK(KERN_INFO "ecm_state_change: %s\n", s);
2204 #endif //DRIVERDEBUG
2205 } // ecm_state_change
2208 /************************
2212 * Sets RMT state in custom statistics.
2214 * smc - A pointer to the SMT context struct.
2216 * r_state - Possible values are:
2218 * RM0_ISOLATED, RM1_NON_OP, RM2_RING_OP, RM3_DETECT,
2219 * RM4_NON_OP_DUP, RM5_RING_OP_DUP, RM6_DIRECTED, RM7_TRACE
2223 ************************/
2224 void rmt_state_change(struct s_smc *smc, int r_state)
2234 s = "RM1_NON_OP - not operational";
2237 s = "RM2_RING_OP - ring operational";
2240 s = "RM3_DETECT - detect dupl addresses";
2242 case RM4_NON_OP_DUP:
2243 s = "RM4_NON_OP_DUP - dupl. addr detected";
2245 case RM5_RING_OP_DUP:
2246 s = "RM5_RING_OP_DUP - ring oper. with dupl. addr";
2249 s = "RM6_DIRECTED - sending directed beacons";
2252 s = "RM7_TRACE - trace initiated";
2258 PRINTK(KERN_INFO "[rmt_state_change: %s]\n", s);
2259 #endif // DRIVERDEBUG
2260 } // rmt_state_change
2263 /************************
2265 * drv_reset_indication
2267 * This function is called by the SMT when it has detected a severe
2268 * hardware problem. The driver should perform a reset on the adapter
2269 * as soon as possible, but not from within this function.
2271 * smc - A pointer to the SMT context struct.
2275 ************************/
2276 void drv_reset_indication(struct s_smc *smc)
2278 PRINTK(KERN_INFO "entering drv_reset_indication\n");
2280 smc->os.ResetRequested = TRUE; // Set flag.
2282 } // drv_reset_indication
2284 static struct pci_driver skfddi_pci_driver = {
2286 .id_table = skfddi_pci_tbl,
2287 .probe = skfp_init_one,
2288 .remove = __devexit_p(skfp_remove_one),
2291 static int __init skfd_init(void)
2293 return pci_module_init(&skfddi_pci_driver);
2296 static void __exit skfd_exit(void)
2298 pci_unregister_driver(&skfddi_pci_driver);
2301 module_init(skfd_init);
2302 module_exit(skfd_exit);