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 * const 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/capability.h>
77 #include <linux/module.h>
78 #include <linux/kernel.h>
79 #include <linux/errno.h>
80 #include <linux/ioport.h>
81 #include <linux/slab.h>
82 #include <linux/interrupt.h>
83 #include <linux/pci.h>
84 #include <linux/netdevice.h>
85 #include <linux/fddidevice.h>
86 #include <linux/skbuff.h>
87 #include <linux/bitops.h>
89 #include <asm/byteorder.h>
91 #include <asm/uaccess.h>
94 #undef ADDR // undo Linux definition
98 #include "h/smtstate.h"
101 // Define module-wide (static) routines
102 static int skfp_driver_init(struct net_device *dev);
103 static int skfp_open(struct net_device *dev);
104 static int skfp_close(struct net_device *dev);
105 static irqreturn_t skfp_interrupt(int irq, void *dev_id);
106 static struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev);
107 static void skfp_ctl_set_multicast_list(struct net_device *dev);
108 static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev);
109 static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr);
110 static int skfp_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
111 static netdev_tx_t skfp_send_pkt(struct sk_buff *skb,
112 struct net_device *dev);
113 static void send_queued_packets(struct s_smc *smc);
114 static void CheckSourceAddress(unsigned char *frame, unsigned char *hw_addr);
115 static void ResetAdapter(struct s_smc *smc);
118 // Functions needed by the hardware module
119 void *mac_drv_get_space(struct s_smc *smc, u_int size);
120 void *mac_drv_get_desc_mem(struct s_smc *smc, u_int size);
121 unsigned long mac_drv_virt2phys(struct s_smc *smc, void *virt);
122 unsigned long dma_master(struct s_smc *smc, void *virt, int len, int flag);
123 void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr,
125 void mac_drv_tx_complete(struct s_smc *smc, volatile struct s_smt_fp_txd *txd);
126 void llc_restart_tx(struct s_smc *smc);
127 void mac_drv_rx_complete(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
128 int frag_count, int len);
129 void mac_drv_requeue_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
131 void mac_drv_fill_rxd(struct s_smc *smc);
132 void mac_drv_clear_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
134 int mac_drv_rx_init(struct s_smc *smc, int len, int fc, char *look_ahead,
136 void dump_data(unsigned char *Data, int length);
138 // External functions from the hardware module
139 extern u_int mac_drv_check_space(void);
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 void fddi_isr(struct s_smc *smc);
146 extern void hwm_rx_frag(struct s_smc *smc, char far * virt, u_long phys,
147 int len, int frame_status);
148 extern void mac_drv_rx_mode(struct s_smc *smc, int mode);
149 extern void mac_drv_clear_rx_queue(struct s_smc *smc);
150 extern void enable_tx_irq(struct s_smc *smc, u_short queue);
152 static DEFINE_PCI_DEVICE_TABLE(skfddi_pci_tbl) = {
153 { PCI_VENDOR_ID_SK, PCI_DEVICE_ID_SK_FP, PCI_ANY_ID, PCI_ANY_ID, },
154 { } /* Terminating entry */
156 MODULE_DEVICE_TABLE(pci, skfddi_pci_tbl);
157 MODULE_LICENSE("GPL");
158 MODULE_AUTHOR("Mirko Lindner <mlindner@syskonnect.de>");
160 // Define module-wide (static) variables
162 static int num_boards; /* total number of adapters configured */
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_change_mtu = fddi_change_mtu,
170 .ndo_set_multicast_list = skfp_ctl_set_multicast_list,
171 .ndo_set_mac_address = skfp_ctl_set_mac_address,
172 .ndo_do_ioctl = skfp_ioctl,
181 * Probes for supported FDDI PCI controllers
187 * pdev - pointer to PCI device information
189 * Functional Description:
190 * This is now called by PCI driver registration process
191 * for each board found.
194 * 0 - This device (fddi0, fddi1, etc) configured successfully
195 * -ENODEV - No devices present, or no SysKonnect FDDI PCI device
196 * present for this device name
200 * Device structures for FDDI adapters (fddi0, fddi1, etc) are
201 * initialized and the board resources are read and stored in
202 * the device structure.
204 static int skfp_init_one(struct pci_dev *pdev,
205 const struct pci_device_id *ent)
207 struct net_device *dev;
208 struct s_smc *smc; /* board pointer */
212 pr_debug(KERN_INFO "entering skfp_init_one\n");
215 printk("%s\n", boot_msg);
217 err = pci_enable_device(pdev);
221 err = pci_request_regions(pdev, "skfddi");
225 pci_set_master(pdev);
228 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
229 printk(KERN_ERR "skfp: region is not an MMIO resource\n");
234 mem = ioremap(pci_resource_start(pdev, 0), 0x4000);
236 if (!(pci_resource_flags(pdev, 1) & IO_RESOURCE_IO)) {
237 printk(KERN_ERR "skfp: region is not PIO resource\n");
242 mem = ioport_map(pci_resource_start(pdev, 1), FP_IO_LEN);
245 printk(KERN_ERR "skfp: Unable to map register, "
246 "FDDI adapter will be disabled.\n");
251 dev = alloc_fddidev(sizeof(struct s_smc));
253 printk(KERN_ERR "skfp: Unable to allocate fddi device, "
254 "FDDI adapter will be disabled.\n");
259 dev->irq = pdev->irq;
260 dev->netdev_ops = &skfp_netdev_ops;
262 SET_NETDEV_DEV(dev, &pdev->dev);
264 /* Initialize board structure with bus-specific info */
265 smc = netdev_priv(dev);
267 smc->os.bus_type = SK_BUS_TYPE_PCI;
268 smc->os.pdev = *pdev;
269 smc->os.QueueSkb = MAX_TX_QUEUE_LEN;
270 smc->os.MaxFrameSize = MAX_FRAME_SIZE;
274 smc->os.ResetRequested = FALSE;
275 skb_queue_head_init(&smc->os.SendSkbQueue);
277 dev->base_addr = (unsigned long)mem;
279 err = skfp_driver_init(dev);
283 err = register_netdev(dev);
288 pci_set_drvdata(pdev, dev);
290 if ((pdev->subsystem_device & 0xff00) == 0x5500 ||
291 (pdev->subsystem_device & 0xff00) == 0x5800)
292 printk("%s: SysKonnect FDDI PCI adapter"
293 " found (SK-%04X)\n", dev->name,
294 pdev->subsystem_device);
296 printk("%s: FDDI PCI adapter found\n", dev->name);
300 if (smc->os.SharedMemAddr)
301 pci_free_consistent(pdev, smc->os.SharedMemSize,
302 smc->os.SharedMemAddr,
303 smc->os.SharedMemDMA);
304 pci_free_consistent(pdev, MAX_FRAME_SIZE,
305 smc->os.LocalRxBuffer, smc->os.LocalRxBufferDMA);
315 pci_release_regions(pdev);
317 pci_disable_device(pdev);
322 * Called for each adapter board from pci_unregister_driver
324 static void __devexit skfp_remove_one(struct pci_dev *pdev)
326 struct net_device *p = pci_get_drvdata(pdev);
327 struct s_smc *lp = netdev_priv(p);
329 unregister_netdev(p);
331 if (lp->os.SharedMemAddr) {
332 pci_free_consistent(&lp->os.pdev,
333 lp->os.SharedMemSize,
334 lp->os.SharedMemAddr,
335 lp->os.SharedMemDMA);
336 lp->os.SharedMemAddr = NULL;
338 if (lp->os.LocalRxBuffer) {
339 pci_free_consistent(&lp->os.pdev,
341 lp->os.LocalRxBuffer,
342 lp->os.LocalRxBufferDMA);
343 lp->os.LocalRxBuffer = NULL;
348 ioport_unmap(lp->hw.iop);
350 pci_release_regions(pdev);
353 pci_disable_device(pdev);
354 pci_set_drvdata(pdev, NULL);
358 * ====================
359 * = skfp_driver_init =
360 * ====================
363 * Initializes remaining adapter board structure information
364 * and makes sure adapter is in a safe state prior to skfp_open().
370 * dev - pointer to device information
372 * Functional Description:
373 * This function allocates additional resources such as the host memory
374 * blocks needed by the adapter.
375 * The adapter is also reset. The OS must call skfp_open() to open
376 * the adapter and bring it on-line.
379 * 0 - initialization succeeded
380 * -1 - initialization failed
382 static int skfp_driver_init(struct net_device *dev)
384 struct s_smc *smc = netdev_priv(dev);
385 skfddi_priv *bp = &smc->os;
388 pr_debug(KERN_INFO "entering skfp_driver_init\n");
390 // set the io address in private structures
391 bp->base_addr = dev->base_addr;
393 // Get the interrupt level from the PCI Configuration Table
394 smc->hw.irq = dev->irq;
396 spin_lock_init(&bp->DriverLock);
398 // Allocate invalid frame
399 bp->LocalRxBuffer = pci_alloc_consistent(&bp->pdev, MAX_FRAME_SIZE, &bp->LocalRxBufferDMA);
400 if (!bp->LocalRxBuffer) {
401 printk("could not allocate mem for ");
402 printk("LocalRxBuffer: %d byte\n", MAX_FRAME_SIZE);
406 // Determine the required size of the 'shared' memory area.
407 bp->SharedMemSize = mac_drv_check_space();
408 pr_debug(KERN_INFO "Memory for HWM: %ld\n", bp->SharedMemSize);
409 if (bp->SharedMemSize > 0) {
410 bp->SharedMemSize += 16; // for descriptor alignment
412 bp->SharedMemAddr = pci_alloc_consistent(&bp->pdev,
415 if (!bp->SharedMemSize) {
416 printk("could not allocate mem for ");
417 printk("hardware module: %ld byte\n",
421 bp->SharedMemHeap = 0; // Nothing used yet.
424 bp->SharedMemAddr = NULL;
425 bp->SharedMemHeap = 0;
426 } // SharedMemSize > 0
428 memset(bp->SharedMemAddr, 0, bp->SharedMemSize);
430 card_stop(smc); // Reset adapter.
432 pr_debug(KERN_INFO "mac_drv_init()..\n");
433 if (mac_drv_init(smc) != 0) {
434 pr_debug(KERN_INFO "mac_drv_init() failed.\n");
437 read_address(smc, NULL);
438 pr_debug(KERN_INFO "HW-Addr: %pMF\n", smc->hw.fddi_canon_addr.a);
439 memcpy(dev->dev_addr, smc->hw.fddi_canon_addr.a, 6);
441 smt_reset_defaults(smc, 0);
446 if (bp->SharedMemAddr) {
447 pci_free_consistent(&bp->pdev,
451 bp->SharedMemAddr = NULL;
453 if (bp->LocalRxBuffer) {
454 pci_free_consistent(&bp->pdev, MAX_FRAME_SIZE,
455 bp->LocalRxBuffer, bp->LocalRxBufferDMA);
456 bp->LocalRxBuffer = NULL;
459 } // skfp_driver_init
474 * dev - pointer to device information
476 * Functional Description:
477 * This function brings the adapter to an operational state.
480 * 0 - Adapter was successfully opened
481 * -EAGAIN - Could not register IRQ
483 static int skfp_open(struct net_device *dev)
485 struct s_smc *smc = netdev_priv(dev);
488 pr_debug(KERN_INFO "entering skfp_open\n");
489 /* Register IRQ - support shared interrupts by passing device ptr */
490 err = request_irq(dev->irq, skfp_interrupt, IRQF_SHARED,
496 * Set current address to factory MAC address
498 * Note: We've already done this step in skfp_driver_init.
499 * However, it's possible that a user has set a node
500 * address override, then closed and reopened the
501 * adapter. Unless we reset the device address field
502 * now, we'll continue to use the existing modified
505 read_address(smc, NULL);
506 memcpy(dev->dev_addr, smc->hw.fddi_canon_addr.a, 6);
512 /* Clear local multicast address tables */
513 mac_clear_multicast(smc);
515 /* Disable promiscuous filter settings */
516 mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);
518 netif_start_queue(dev);
529 * Closes the device/module.
535 * dev - pointer to device information
537 * Functional Description:
538 * This routine closes the adapter and brings it to a safe state.
539 * The interrupt service routine is deregistered with the OS.
540 * The adapter can be opened again with another call to skfp_open().
546 * No further requests for this adapter are made after this routine is
547 * called. skfp_open() can be called to reset and reinitialize the
550 static int skfp_close(struct net_device *dev)
552 struct s_smc *smc = netdev_priv(dev);
553 skfddi_priv *bp = &smc->os;
556 smt_reset_defaults(smc, 1);
558 mac_drv_clear_tx_queue(smc);
559 mac_drv_clear_rx_queue(smc);
561 netif_stop_queue(dev);
562 /* Deregister (free) IRQ */
563 free_irq(dev->irq, dev);
565 skb_queue_purge(&bp->SendSkbQueue);
566 bp->QueueSkb = MAX_TX_QUEUE_LEN;
578 * Interrupt processing routine
584 * irq - interrupt vector
585 * dev_id - pointer to device information
587 * Functional Description:
588 * This routine calls the interrupt processing routine for this adapter. It
589 * disables and reenables adapter interrupts, as appropriate. We can support
590 * shared interrupts since the incoming dev_id pointer provides our device
591 * structure context. All the real work is done in the hardware module.
597 * The interrupt acknowledgement at the hardware level (eg. ACKing the PIC
598 * on Intel-based systems) is done by the operating system outside this
601 * System interrupts are enabled through this call.
604 * Interrupts are disabled, then reenabled at the adapter.
607 static irqreturn_t skfp_interrupt(int irq, void *dev_id)
609 struct net_device *dev = dev_id;
610 struct s_smc *smc; /* private board structure pointer */
613 smc = netdev_priv(dev);
616 // IRQs enabled or disabled ?
617 if (inpd(ADDR(B0_IMSK)) == 0) {
618 // IRQs are disabled: must be shared interrupt
621 // Note: At this point, IRQs are enabled.
622 if ((inpd(ISR_A) & smc->hw.is_imask) == 0) { // IRQ?
623 // Adapter did not issue an IRQ: must be shared interrupt
626 CLI_FBI(); // Disable IRQs from our adapter.
627 spin_lock(&bp->DriverLock);
629 // Call interrupt handler in hardware module (HWM).
632 if (smc->os.ResetRequested) {
634 smc->os.ResetRequested = FALSE;
636 spin_unlock(&bp->DriverLock);
637 STI_FBI(); // Enable IRQs from our adapter.
644 * ======================
645 * = skfp_ctl_get_stats =
646 * ======================
649 * Get statistics for FDDI adapter
652 * Pointer to FDDI statistics structure
655 * dev - pointer to device information
657 * Functional Description:
658 * Gets current MIB objects from adapter, then
659 * returns FDDI statistics structure as defined
662 * Note: Since the FDDI statistics structure is
663 * still new and the device structure doesn't
664 * have an FDDI-specific get statistics handler,
665 * we'll return the FDDI statistics structure as
666 * a pointer to an Ethernet statistics structure.
667 * That way, at least the first part of the statistics
668 * structure can be decoded properly.
669 * We'll have to pay attention to this routine as the
670 * device structure becomes more mature and LAN media
674 static struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev)
676 struct s_smc *bp = netdev_priv(dev);
678 /* Fill the bp->stats structure with driver-maintained counters */
680 bp->os.MacStat.port_bs_flag[0] = 0x1234;
681 bp->os.MacStat.port_bs_flag[1] = 0x5678;
682 // goos: need to fill out fddi statistic
684 /* Get FDDI SMT MIB objects */
686 /* Fill the bp->stats structure with the SMT MIB object values */
688 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));
689 bp->stats.smt_op_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_op_version_id;
690 bp->stats.smt_hi_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_hi_version_id;
691 bp->stats.smt_lo_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_lo_version_id;
692 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));
693 bp->stats.smt_mib_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_mib_version_id;
694 bp->stats.smt_mac_cts = bp->cmd_rsp_virt->smt_mib_get.smt_mac_ct;
695 bp->stats.smt_non_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_non_master_ct;
696 bp->stats.smt_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_master_ct;
697 bp->stats.smt_available_paths = bp->cmd_rsp_virt->smt_mib_get.smt_available_paths;
698 bp->stats.smt_config_capabilities = bp->cmd_rsp_virt->smt_mib_get.smt_config_capabilities;
699 bp->stats.smt_config_policy = bp->cmd_rsp_virt->smt_mib_get.smt_config_policy;
700 bp->stats.smt_connection_policy = bp->cmd_rsp_virt->smt_mib_get.smt_connection_policy;
701 bp->stats.smt_t_notify = bp->cmd_rsp_virt->smt_mib_get.smt_t_notify;
702 bp->stats.smt_stat_rpt_policy = bp->cmd_rsp_virt->smt_mib_get.smt_stat_rpt_policy;
703 bp->stats.smt_trace_max_expiration = bp->cmd_rsp_virt->smt_mib_get.smt_trace_max_expiration;
704 bp->stats.smt_bypass_present = bp->cmd_rsp_virt->smt_mib_get.smt_bypass_present;
705 bp->stats.smt_ecm_state = bp->cmd_rsp_virt->smt_mib_get.smt_ecm_state;
706 bp->stats.smt_cf_state = bp->cmd_rsp_virt->smt_mib_get.smt_cf_state;
707 bp->stats.smt_remote_disconnect_flag = bp->cmd_rsp_virt->smt_mib_get.smt_remote_disconnect_flag;
708 bp->stats.smt_station_status = bp->cmd_rsp_virt->smt_mib_get.smt_station_status;
709 bp->stats.smt_peer_wrap_flag = bp->cmd_rsp_virt->smt_mib_get.smt_peer_wrap_flag;
710 bp->stats.smt_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_msg_time_stamp.ls;
711 bp->stats.smt_transition_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_transition_time_stamp.ls;
712 bp->stats.mac_frame_status_functions = bp->cmd_rsp_virt->smt_mib_get.mac_frame_status_functions;
713 bp->stats.mac_t_max_capability = bp->cmd_rsp_virt->smt_mib_get.mac_t_max_capability;
714 bp->stats.mac_tvx_capability = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_capability;
715 bp->stats.mac_available_paths = bp->cmd_rsp_virt->smt_mib_get.mac_available_paths;
716 bp->stats.mac_current_path = bp->cmd_rsp_virt->smt_mib_get.mac_current_path;
717 memcpy(bp->stats.mac_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_upstream_nbr, FDDI_K_ALEN);
718 memcpy(bp->stats.mac_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_downstream_nbr, FDDI_K_ALEN);
719 memcpy(bp->stats.mac_old_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_upstream_nbr, FDDI_K_ALEN);
720 memcpy(bp->stats.mac_old_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_downstream_nbr, FDDI_K_ALEN);
721 bp->stats.mac_dup_address_test = bp->cmd_rsp_virt->smt_mib_get.mac_dup_address_test;
722 bp->stats.mac_requested_paths = bp->cmd_rsp_virt->smt_mib_get.mac_requested_paths;
723 bp->stats.mac_downstream_port_type = bp->cmd_rsp_virt->smt_mib_get.mac_downstream_port_type;
724 memcpy(bp->stats.mac_smt_address, &bp->cmd_rsp_virt->smt_mib_get.mac_smt_address, FDDI_K_ALEN);
725 bp->stats.mac_t_req = bp->cmd_rsp_virt->smt_mib_get.mac_t_req;
726 bp->stats.mac_t_neg = bp->cmd_rsp_virt->smt_mib_get.mac_t_neg;
727 bp->stats.mac_t_max = bp->cmd_rsp_virt->smt_mib_get.mac_t_max;
728 bp->stats.mac_tvx_value = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_value;
729 bp->stats.mac_frame_error_threshold = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_threshold;
730 bp->stats.mac_frame_error_ratio = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_ratio;
731 bp->stats.mac_rmt_state = bp->cmd_rsp_virt->smt_mib_get.mac_rmt_state;
732 bp->stats.mac_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_da_flag;
733 bp->stats.mac_una_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_unda_flag;
734 bp->stats.mac_frame_error_flag = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_flag;
735 bp->stats.mac_ma_unitdata_available = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_available;
736 bp->stats.mac_hardware_present = bp->cmd_rsp_virt->smt_mib_get.mac_hardware_present;
737 bp->stats.mac_ma_unitdata_enable = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_enable;
738 bp->stats.path_tvx_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_tvx_lower_bound;
739 bp->stats.path_t_max_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_t_max_lower_bound;
740 bp->stats.path_max_t_req = bp->cmd_rsp_virt->smt_mib_get.path_max_t_req;
741 memcpy(bp->stats.path_configuration, &bp->cmd_rsp_virt->smt_mib_get.path_configuration, sizeof(bp->cmd_rsp_virt->smt_mib_get.path_configuration));
742 bp->stats.port_my_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[0];
743 bp->stats.port_my_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[1];
744 bp->stats.port_neighbor_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[0];
745 bp->stats.port_neighbor_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[1];
746 bp->stats.port_connection_policies[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[0];
747 bp->stats.port_connection_policies[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[1];
748 bp->stats.port_mac_indicated[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[0];
749 bp->stats.port_mac_indicated[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[1];
750 bp->stats.port_current_path[0] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[0];
751 bp->stats.port_current_path[1] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[1];
752 memcpy(&bp->stats.port_requested_paths[0 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[0], 3);
753 memcpy(&bp->stats.port_requested_paths[1 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[1], 3);
754 bp->stats.port_mac_placement[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[0];
755 bp->stats.port_mac_placement[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[1];
756 bp->stats.port_available_paths[0] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[0];
757 bp->stats.port_available_paths[1] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[1];
758 bp->stats.port_pmd_class[0] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[0];
759 bp->stats.port_pmd_class[1] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[1];
760 bp->stats.port_connection_capabilities[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[0];
761 bp->stats.port_connection_capabilities[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[1];
762 bp->stats.port_bs_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[0];
763 bp->stats.port_bs_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[1];
764 bp->stats.port_ler_estimate[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[0];
765 bp->stats.port_ler_estimate[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[1];
766 bp->stats.port_ler_cutoff[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[0];
767 bp->stats.port_ler_cutoff[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[1];
768 bp->stats.port_ler_alarm[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[0];
769 bp->stats.port_ler_alarm[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[1];
770 bp->stats.port_connect_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[0];
771 bp->stats.port_connect_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[1];
772 bp->stats.port_pcm_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[0];
773 bp->stats.port_pcm_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[1];
774 bp->stats.port_pc_withhold[0] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[0];
775 bp->stats.port_pc_withhold[1] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[1];
776 bp->stats.port_ler_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[0];
777 bp->stats.port_ler_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[1];
778 bp->stats.port_hardware_present[0] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[0];
779 bp->stats.port_hardware_present[1] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[1];
782 /* Fill the bp->stats structure with the FDDI counter values */
784 bp->stats.mac_frame_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.frame_cnt.ls;
785 bp->stats.mac_copied_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.copied_cnt.ls;
786 bp->stats.mac_transmit_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.transmit_cnt.ls;
787 bp->stats.mac_error_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.error_cnt.ls;
788 bp->stats.mac_lost_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.lost_cnt.ls;
789 bp->stats.port_lct_fail_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[0].ls;
790 bp->stats.port_lct_fail_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[1].ls;
791 bp->stats.port_lem_reject_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[0].ls;
792 bp->stats.port_lem_reject_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[1].ls;
793 bp->stats.port_lem_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[0].ls;
794 bp->stats.port_lem_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[1].ls;
797 return ((struct net_device_stats *) &bp->os.MacStat);
802 * ==============================
803 * = skfp_ctl_set_multicast_list =
804 * ==============================
807 * Enable/Disable LLC frame promiscuous mode reception
808 * on the adapter and/or update multicast address table.
814 * dev - pointer to device information
816 * Functional Description:
817 * This function acquires the driver lock and only calls
818 * skfp_ctl_set_multicast_list_wo_lock then.
819 * This routine follows a fairly simple algorithm for setting the
820 * adapter filters and CAM:
822 * if IFF_PROMISC flag is set
823 * enable promiscuous mode
825 * disable promiscuous mode
826 * if number of multicast addresses <= max. multicast number
827 * add mc addresses to adapter table
829 * enable promiscuous mode
830 * update adapter filters
833 * Multicast addresses are presented in canonical (LSB) format.
836 * On-board adapter filters are updated.
838 static void skfp_ctl_set_multicast_list(struct net_device *dev)
840 struct s_smc *smc = netdev_priv(dev);
841 skfddi_priv *bp = &smc->os;
844 spin_lock_irqsave(&bp->DriverLock, Flags);
845 skfp_ctl_set_multicast_list_wo_lock(dev);
846 spin_unlock_irqrestore(&bp->DriverLock, Flags);
848 } // skfp_ctl_set_multicast_list
852 static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev)
854 struct s_smc *smc = netdev_priv(dev);
855 struct dev_mc_list *dmi; /* ptr to multicast addr entry */
858 /* Enable promiscuous mode, if necessary */
859 if (dev->flags & IFF_PROMISC) {
860 mac_drv_rx_mode(smc, RX_ENABLE_PROMISC);
861 pr_debug(KERN_INFO "PROMISCUOUS MODE ENABLED\n");
863 /* Else, update multicast address table */
865 mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);
866 pr_debug(KERN_INFO "PROMISCUOUS MODE DISABLED\n");
868 // Reset all MC addresses
869 mac_clear_multicast(smc);
870 mac_drv_rx_mode(smc, RX_DISABLE_ALLMULTI);
872 if (dev->flags & IFF_ALLMULTI) {
873 mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI);
874 pr_debug(KERN_INFO "ENABLE ALL MC ADDRESSES\n");
875 } else if (!netdev_mc_empty(dev)) {
876 if (netdev_mc_count(dev) <= FPMAX_MULTICAST) {
877 /* use exact filtering */
879 // point to first multicast addr
882 for (i = 0; i < netdev_mc_count(dev); i++) {
883 mac_add_multicast(smc,
884 (struct fddi_addr *)dmi->dmi_addr,
887 pr_debug(KERN_INFO "ENABLE MC ADDRESS: %pMF\n",
892 } else { // more MC addresses than HW supports
894 mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI);
895 pr_debug(KERN_INFO "ENABLE ALL MC ADDRESSES\n");
897 } else { // no MC addresses
899 pr_debug(KERN_INFO "DISABLE ALL MC ADDRESSES\n");
902 /* Update adapter filters */
903 mac_update_multicast(smc);
906 } // skfp_ctl_set_multicast_list_wo_lock
910 * ===========================
911 * = skfp_ctl_set_mac_address =
912 * ===========================
915 * set new mac address on adapter and update dev_addr field in device table.
921 * dev - pointer to device information
922 * addr - pointer to sockaddr structure containing unicast address to set
925 * The address pointed to by addr->sa_data is a valid unicast
926 * address and is presented in canonical (LSB) format.
928 static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr)
930 struct s_smc *smc = netdev_priv(dev);
931 struct sockaddr *p_sockaddr = (struct sockaddr *) addr;
932 skfddi_priv *bp = &smc->os;
936 memcpy(dev->dev_addr, p_sockaddr->sa_data, FDDI_K_ALEN);
937 spin_lock_irqsave(&bp->DriverLock, Flags);
939 spin_unlock_irqrestore(&bp->DriverLock, Flags);
941 return (0); /* always return zero */
942 } // skfp_ctl_set_mac_address
952 * Perform IOCTL call functions here. Some are privileged operations and the
953 * effective uid is checked in those cases.
961 * dev - pointer to device information
962 * rq - pointer to ioctl request structure
968 static int skfp_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
970 struct s_smc *smc = netdev_priv(dev);
971 skfddi_priv *lp = &smc->os;
972 struct s_skfp_ioctl ioc;
975 if (copy_from_user(&ioc, rq->ifr_data, sizeof(struct s_skfp_ioctl)))
979 case SKFP_GET_STATS: /* Get the driver statistics */
980 ioc.len = sizeof(lp->MacStat);
981 status = copy_to_user(ioc.data, skfp_ctl_get_stats(dev), ioc.len)
984 case SKFP_CLR_STATS: /* Zero out the driver statistics */
985 if (!capable(CAP_NET_ADMIN)) {
988 memset(&lp->MacStat, 0, sizeof(lp->MacStat));
992 printk("ioctl for %s: unknown cmd: %04x\n", dev->name, ioc.cmd);
993 status = -EOPNOTSUPP;
1002 * =====================
1004 * =====================
1007 * Queues a packet for transmission and try to transmit it.
1013 * skb - pointer to sk_buff to queue for transmission
1014 * dev - pointer to device information
1016 * Functional Description:
1017 * Here we assume that an incoming skb transmit request
1018 * is contained in a single physically contiguous buffer
1019 * in which the virtual address of the start of packet
1020 * (skb->data) can be converted to a physical address
1021 * by using pci_map_single().
1023 * We have an internal queue for packets we can not send
1024 * immediately. Packets in this queue can be given to the
1025 * adapter if transmit buffers are freed.
1027 * We can't free the skb until after it's been DMA'd
1028 * out by the adapter, so we'll keep it in the driver and
1029 * return it in mac_drv_tx_complete.
1032 * 0 - driver has queued and/or sent packet
1033 * 1 - caller should requeue the sk_buff for later transmission
1036 * The entire packet is stored in one physically
1037 * contiguous buffer which is not cached and whose
1038 * 32-bit physical address can be determined.
1040 * It's vital that this routine is NOT reentered for the
1041 * same board and that the OS is not in another section of
1042 * code (eg. skfp_interrupt) for the same board on a
1048 static netdev_tx_t skfp_send_pkt(struct sk_buff *skb,
1049 struct net_device *dev)
1051 struct s_smc *smc = netdev_priv(dev);
1052 skfddi_priv *bp = &smc->os;
1054 pr_debug(KERN_INFO "skfp_send_pkt\n");
1057 * Verify that incoming transmit request is OK
1059 * Note: The packet size check is consistent with other
1060 * Linux device drivers, although the correct packet
1061 * size should be verified before calling the
1065 if (!(skb->len >= FDDI_K_LLC_ZLEN && skb->len <= FDDI_K_LLC_LEN)) {
1066 bp->MacStat.gen.tx_errors++; /* bump error counter */
1067 // dequeue packets from xmt queue and send them
1068 netif_start_queue(dev);
1070 return NETDEV_TX_OK; /* return "success" */
1072 if (bp->QueueSkb == 0) { // return with tbusy set: queue full
1074 netif_stop_queue(dev);
1075 return NETDEV_TX_BUSY;
1078 skb_queue_tail(&bp->SendSkbQueue, skb);
1079 send_queued_packets(netdev_priv(dev));
1080 if (bp->QueueSkb == 0) {
1081 netif_stop_queue(dev);
1083 dev->trans_start = jiffies;
1084 return NETDEV_TX_OK;
1090 * =======================
1091 * = send_queued_packets =
1092 * =======================
1095 * Send packets from the driver queue as long as there are some and
1096 * transmit resources are available.
1102 * smc - pointer to smc (adapter) structure
1104 * Functional Description:
1105 * Take a packet from queue if there is any. If not, then we are done.
1106 * Check if there are resources to send the packet. If not, requeue it
1108 * Set packet descriptor flags and give packet to adapter.
1109 * Check if any send resources can be freed (we do not use the
1110 * transmit complete interrupt).
1112 static void send_queued_packets(struct s_smc *smc)
1114 skfddi_priv *bp = &smc->os;
1115 struct sk_buff *skb;
1118 struct s_smt_fp_txd *txd; // Current TxD.
1119 dma_addr_t dma_address;
1120 unsigned long Flags;
1122 int frame_status; // HWM tx frame status.
1124 pr_debug(KERN_INFO "send queued packets\n");
1126 // send first buffer from queue
1127 skb = skb_dequeue(&bp->SendSkbQueue);
1130 pr_debug(KERN_INFO "queue empty\n");
1134 spin_lock_irqsave(&bp->DriverLock, Flags);
1136 queue = (fc & FC_SYNC_BIT) ? QUEUE_S : QUEUE_A0;
1138 // Check if the frame may/must be sent as a synchronous frame.
1140 if ((fc & ~(FC_SYNC_BIT | FC_LLC_PRIOR)) == FC_ASYNC_LLC) {
1141 // It's an LLC frame.
1142 if (!smc->ess.sync_bw_available)
1143 fc &= ~FC_SYNC_BIT; // No bandwidth available.
1145 else { // Bandwidth is available.
1147 if (smc->mib.fddiESSSynchTxMode) {
1148 // Send as sync. frame.
1154 frame_status = hwm_tx_init(smc, fc, 1, skb->len, queue);
1156 if ((frame_status & (LOC_TX | LAN_TX)) == 0) {
1157 // Unable to send the frame.
1159 if ((frame_status & RING_DOWN) != 0) {
1161 pr_debug("Tx attempt while ring down.\n");
1162 } else if ((frame_status & OUT_OF_TXD) != 0) {
1163 pr_debug("%s: out of TXDs.\n", bp->dev->name);
1165 pr_debug("%s: out of transmit resources",
1169 // Note: We will retry the operation as soon as
1170 // transmit resources become available.
1171 skb_queue_head(&bp->SendSkbQueue, skb);
1172 spin_unlock_irqrestore(&bp->DriverLock, Flags);
1173 return; // Packet has been queued.
1175 } // if (unable to send frame)
1177 bp->QueueSkb++; // one packet less in local queue
1179 // source address in packet ?
1180 CheckSourceAddress(skb->data, smc->hw.fddi_canon_addr.a);
1182 txd = (struct s_smt_fp_txd *) HWM_GET_CURR_TXD(smc, queue);
1184 dma_address = pci_map_single(&bp->pdev, skb->data,
1185 skb->len, PCI_DMA_TODEVICE);
1186 if (frame_status & LAN_TX) {
1187 txd->txd_os.skb = skb; // save skb
1188 txd->txd_os.dma_addr = dma_address; // save dma mapping
1190 hwm_tx_frag(smc, skb->data, dma_address, skb->len,
1191 frame_status | FIRST_FRAG | LAST_FRAG | EN_IRQ_EOF);
1193 if (!(frame_status & LAN_TX)) { // local only frame
1194 pci_unmap_single(&bp->pdev, dma_address,
1195 skb->len, PCI_DMA_TODEVICE);
1196 dev_kfree_skb_irq(skb);
1198 spin_unlock_irqrestore(&bp->DriverLock, Flags);
1201 return; // never reached
1203 } // send_queued_packets
1206 /************************
1208 * CheckSourceAddress
1210 * Verify if the source address is set. Insert it if necessary.
1212 ************************/
1213 static void CheckSourceAddress(unsigned char *frame, unsigned char *hw_addr)
1215 unsigned char SRBit;
1217 if ((((unsigned long) frame[1 + 6]) & ~0x01) != 0) // source routing bit
1220 if ((unsigned short) frame[1 + 10] != 0)
1222 SRBit = frame[1 + 6] & 0x01;
1223 memcpy(&frame[1 + 6], hw_addr, 6);
1225 } // CheckSourceAddress
1228 /************************
1232 * Reset the adapter and bring it back to operational mode.
1234 * smc - A pointer to the SMT context struct.
1238 ************************/
1239 static void ResetAdapter(struct s_smc *smc)
1242 pr_debug(KERN_INFO "[fddi: ResetAdapter]\n");
1244 // Stop the adapter.
1246 card_stop(smc); // Stop all activity.
1248 // Clear the transmit and receive descriptor queues.
1249 mac_drv_clear_tx_queue(smc);
1250 mac_drv_clear_rx_queue(smc);
1252 // Restart the adapter.
1254 smt_reset_defaults(smc, 1); // Initialize the SMT module.
1256 init_smt(smc, (smc->os.dev)->dev_addr); // Initialize the hardware.
1258 smt_online(smc, 1); // Insert into the ring again.
1261 // Restore original receive mode (multicasts, promiscuous, etc.).
1262 skfp_ctl_set_multicast_list_wo_lock(smc->os.dev);
1266 //--------------- functions called by hardware module ----------------
1268 /************************
1272 * The hardware driver calls this routine when the transmit complete
1273 * interrupt bits (end of frame) for the synchronous or asynchronous
1276 * NOTE The hardware driver calls this function also if no packets are queued.
1277 * The routine must be able to handle this case.
1279 * smc - A pointer to the SMT context struct.
1283 ************************/
1284 void llc_restart_tx(struct s_smc *smc)
1286 skfddi_priv *bp = &smc->os;
1288 pr_debug(KERN_INFO "[llc_restart_tx]\n");
1290 // Try to send queued packets
1291 spin_unlock(&bp->DriverLock);
1292 send_queued_packets(smc);
1293 spin_lock(&bp->DriverLock);
1294 netif_start_queue(bp->dev);// system may send again if it was blocked
1299 /************************
1303 * The hardware module calls this function to allocate the memory
1304 * for the SMT MBufs if the define MB_OUTSIDE_SMC is specified.
1306 * smc - A pointer to the SMT context struct.
1308 * size - Size of memory in bytes to allocate.
1310 * != 0 A pointer to the virtual address of the allocated memory.
1311 * == 0 Allocation error.
1313 ************************/
1314 void *mac_drv_get_space(struct s_smc *smc, unsigned int size)
1318 pr_debug(KERN_INFO "mac_drv_get_space (%d bytes), ", size);
1319 virt = (void *) (smc->os.SharedMemAddr + smc->os.SharedMemHeap);
1321 if ((smc->os.SharedMemHeap + size) > smc->os.SharedMemSize) {
1322 printk("Unexpected SMT memory size requested: %d\n", size);
1325 smc->os.SharedMemHeap += size; // Move heap pointer.
1327 pr_debug(KERN_INFO "mac_drv_get_space end\n");
1328 pr_debug(KERN_INFO "virt addr: %lx\n", (ulong) virt);
1329 pr_debug(KERN_INFO "bus addr: %lx\n", (ulong)
1330 (smc->os.SharedMemDMA +
1331 ((char *) virt - (char *)smc->os.SharedMemAddr)));
1333 } // mac_drv_get_space
1336 /************************
1338 * mac_drv_get_desc_mem
1340 * This function is called by the hardware dependent module.
1341 * It allocates the memory for the RxD and TxD descriptors.
1343 * This memory must be non-cached, non-movable and non-swappable.
1344 * This memory should start at a physical page boundary.
1346 * smc - A pointer to the SMT context struct.
1348 * size - Size of memory in bytes to allocate.
1350 * != 0 A pointer to the virtual address of the allocated memory.
1351 * == 0 Allocation error.
1353 ************************/
1354 void *mac_drv_get_desc_mem(struct s_smc *smc, unsigned int size)
1359 pr_debug(KERN_INFO "mac_drv_get_desc_mem\n");
1361 // Descriptor memory must be aligned on 16-byte boundary.
1363 virt = mac_drv_get_space(smc, size);
1365 size = (u_int) (16 - (((unsigned long) virt) & 15UL));
1368 pr_debug("Allocate %u bytes alignment gap ", size);
1369 pr_debug("for descriptor memory.\n");
1371 if (!mac_drv_get_space(smc, size)) {
1372 printk("fddi: Unable to align descriptor memory.\n");
1375 return (virt + size);
1376 } // mac_drv_get_desc_mem
1379 /************************
1383 * Get the physical address of a given virtual address.
1385 * smc - A pointer to the SMT context struct.
1387 * virt - A (virtual) pointer into our 'shared' memory area.
1389 * Physical address of the given virtual address.
1391 ************************/
1392 unsigned long mac_drv_virt2phys(struct s_smc *smc, void *virt)
1394 return (smc->os.SharedMemDMA +
1395 ((char *) virt - (char *)smc->os.SharedMemAddr));
1396 } // mac_drv_virt2phys
1399 /************************
1403 * The HWM calls this function, when the driver leads through a DMA
1404 * transfer. If the OS-specific module must prepare the system hardware
1405 * for the DMA transfer, it should do it in this function.
1407 * The hardware module calls this dma_master if it wants to send an SMT
1408 * frame. This means that the virt address passed in here is part of
1409 * the 'shared' memory area.
1411 * smc - A pointer to the SMT context struct.
1413 * virt - The virtual address of the data.
1415 * len - The length in bytes of the data.
1417 * flag - Indicates the transmit direction and the buffer type:
1418 * DMA_RD (0x01) system RAM ==> adapter buffer memory
1419 * DMA_WR (0x02) adapter buffer memory ==> system RAM
1420 * SMT_BUF (0x80) SMT buffer
1422 * >> NOTE: SMT_BUF and DMA_RD are always set for PCI. <<
1424 * Returns the pyhsical address for the DMA transfer.
1426 ************************/
1427 u_long dma_master(struct s_smc * smc, void *virt, int len, int flag)
1429 return (smc->os.SharedMemDMA +
1430 ((char *) virt - (char *)smc->os.SharedMemAddr));
1434 /************************
1438 * The hardware module calls this routine when it has completed a DMA
1439 * transfer. If the operating system dependent module has set up the DMA
1440 * channel via dma_master() (e.g. Windows NT or AIX) it should clean up
1443 * smc - A pointer to the SMT context struct.
1445 * descr - A pointer to a TxD or RxD, respectively.
1447 * flag - Indicates the DMA transfer direction / SMT buffer:
1448 * DMA_RD (0x01) system RAM ==> adapter buffer memory
1449 * DMA_WR (0x02) adapter buffer memory ==> system RAM
1450 * SMT_BUF (0x80) SMT buffer (managed by HWM)
1454 ************************/
1455 void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr, int flag)
1457 /* For TX buffers, there are two cases. If it is an SMT transmit
1458 * buffer, there is nothing to do since we use consistent memory
1459 * for the 'shared' memory area. The other case is for normal
1460 * transmit packets given to us by the networking stack, and in
1461 * that case we cleanup the PCI DMA mapping in mac_drv_tx_complete
1464 * For RX buffers, we have to unmap dynamic PCI DMA mappings here
1465 * because the hardware module is about to potentially look at
1466 * the contents of the buffer. If we did not call the PCI DMA
1467 * unmap first, the hardware module could read inconsistent data.
1469 if (flag & DMA_WR) {
1470 skfddi_priv *bp = &smc->os;
1471 volatile struct s_smt_fp_rxd *r = &descr->r;
1473 /* If SKB is NULL, we used the local buffer. */
1474 if (r->rxd_os.skb && r->rxd_os.dma_addr) {
1475 int MaxFrameSize = bp->MaxFrameSize;
1477 pci_unmap_single(&bp->pdev, r->rxd_os.dma_addr,
1478 MaxFrameSize, PCI_DMA_FROMDEVICE);
1479 r->rxd_os.dma_addr = 0;
1485 /************************
1487 * mac_drv_tx_complete
1489 * Transmit of a packet is complete. Release the tx staging buffer.
1492 * smc - A pointer to the SMT context struct.
1494 * txd - A pointer to the last TxD which is used by the frame.
1498 ************************/
1499 void mac_drv_tx_complete(struct s_smc *smc, volatile struct s_smt_fp_txd *txd)
1501 struct sk_buff *skb;
1503 pr_debug(KERN_INFO "entering mac_drv_tx_complete\n");
1504 // Check if this TxD points to a skb
1506 if (!(skb = txd->txd_os.skb)) {
1507 pr_debug("TXD with no skb assigned.\n");
1510 txd->txd_os.skb = NULL;
1512 // release the DMA mapping
1513 pci_unmap_single(&smc->os.pdev, txd->txd_os.dma_addr,
1514 skb->len, PCI_DMA_TODEVICE);
1515 txd->txd_os.dma_addr = 0;
1517 smc->os.MacStat.gen.tx_packets++; // Count transmitted packets.
1518 smc->os.MacStat.gen.tx_bytes+=skb->len; // Count bytes
1521 dev_kfree_skb_irq(skb);
1523 pr_debug(KERN_INFO "leaving mac_drv_tx_complete\n");
1524 } // mac_drv_tx_complete
1527 /************************
1529 * dump packets to logfile
1531 ************************/
1533 void dump_data(unsigned char *Data, int length)
1536 unsigned char s[255], sh[10];
1540 printk(KERN_INFO "---Packet start---\n");
1541 for (i = 0, j = 0; i < length / 8; i++, j += 8)
1542 printk(KERN_INFO "%02x %02x %02x %02x %02x %02x %02x %02x\n",
1543 Data[j + 0], Data[j + 1], Data[j + 2], Data[j + 3],
1544 Data[j + 4], Data[j + 5], Data[j + 6], Data[j + 7]);
1546 for (i = 0; i < length % 8; i++) {
1547 sprintf(sh, "%02x ", Data[j + i]);
1550 printk(KERN_INFO "%s\n", s);
1551 printk(KERN_INFO "------------------\n");
1554 #define dump_data(data,len)
1555 #endif // DUMPPACKETS
1557 /************************
1559 * mac_drv_rx_complete
1561 * The hardware module calls this function if an LLC frame is received
1562 * in a receive buffer. Also the SMT, NSA, and directed beacon frames
1563 * from the network will be passed to the LLC layer by this function
1564 * if passing is enabled.
1566 * mac_drv_rx_complete forwards the frame to the LLC layer if it should
1567 * be received. It also fills the RxD ring with new receive buffers if
1568 * some can be queued.
1570 * smc - A pointer to the SMT context struct.
1572 * rxd - A pointer to the first RxD which is used by the receive frame.
1574 * frag_count - Count of RxDs used by the received frame.
1576 * len - Frame length.
1580 ************************/
1581 void mac_drv_rx_complete(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
1582 int frag_count, int len)
1584 skfddi_priv *bp = &smc->os;
1585 struct sk_buff *skb;
1586 unsigned char *virt, *cp;
1590 pr_debug(KERN_INFO "entering mac_drv_rx_complete (len=%d)\n", len);
1591 if (frag_count != 1) { // This is not allowed to happen.
1593 printk("fddi: Multi-fragment receive!\n");
1594 goto RequeueRxd; // Re-use the given RXD(s).
1597 skb = rxd->rxd_os.skb;
1599 pr_debug(KERN_INFO "No skb in rxd\n");
1600 smc->os.MacStat.gen.rx_errors++;
1605 // The DMA mapping was released in dma_complete above.
1607 dump_data(skb->data, len);
1610 * FDDI Frame format:
1611 * +-------+-------+-------+------------+--------+------------+
1612 * | FC[1] | DA[6] | SA[6] | RIF[0..18] | LLC[3] | Data[0..n] |
1613 * +-------+-------+-------+------------+--------+------------+
1615 * FC = Frame Control
1616 * DA = Destination Address
1617 * SA = Source Address
1618 * RIF = Routing Information Field
1619 * LLC = Logical Link Control
1622 // Remove Routing Information Field (RIF), if present.
1624 if ((virt[1 + 6] & FDDI_RII) == 0)
1628 // goos: RIF removal has still to be tested
1629 pr_debug(KERN_INFO "RIF found\n");
1630 // Get RIF length from Routing Control (RC) field.
1631 cp = virt + FDDI_MAC_HDR_LEN; // Point behind MAC header.
1633 ri = ntohs(*((__be16 *) cp));
1634 RifLength = ri & FDDI_RCF_LEN_MASK;
1635 if (len < (int) (FDDI_MAC_HDR_LEN + RifLength)) {
1636 printk("fddi: Invalid RIF.\n");
1637 goto RequeueRxd; // Discard the frame.
1640 virt[1 + 6] &= ~FDDI_RII; // Clear RII bit.
1643 virt = cp + RifLength;
1644 for (n = FDDI_MAC_HDR_LEN; n; n--)
1646 // adjust sbd->data pointer
1647 skb_pull(skb, RifLength);
1652 // Count statistics.
1653 smc->os.MacStat.gen.rx_packets++; // Count indicated receive
1655 smc->os.MacStat.gen.rx_bytes+=len; // Count bytes.
1657 // virt points to header again
1658 if (virt[1] & 0x01) { // Check group (multicast) bit.
1660 smc->os.MacStat.gen.multicast++;
1663 // deliver frame to system
1664 rxd->rxd_os.skb = NULL;
1666 skb->protocol = fddi_type_trans(skb, bp->dev);
1670 HWM_RX_CHECK(smc, RX_LOW_WATERMARK);
1674 pr_debug(KERN_INFO "Rx: re-queue RXD.\n");
1675 mac_drv_requeue_rxd(smc, rxd, frag_count);
1676 smc->os.MacStat.gen.rx_errors++; // Count receive packets
1679 } // mac_drv_rx_complete
1682 /************************
1684 * mac_drv_requeue_rxd
1686 * The hardware module calls this function to request the OS-specific
1687 * module to queue the receive buffer(s) represented by the pointer
1688 * to the RxD and the frag_count into the receive queue again. This
1689 * buffer was filled with an invalid frame or an SMT frame.
1691 * smc - A pointer to the SMT context struct.
1693 * rxd - A pointer to the first RxD which is used by the receive frame.
1695 * frag_count - Count of RxDs used by the received frame.
1699 ************************/
1700 void mac_drv_requeue_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
1703 volatile struct s_smt_fp_rxd *next_rxd;
1704 volatile struct s_smt_fp_rxd *src_rxd;
1705 struct sk_buff *skb;
1707 unsigned char *v_addr;
1710 if (frag_count != 1) // This is not allowed to happen.
1712 printk("fddi: Multi-fragment requeue!\n");
1714 MaxFrameSize = smc->os.MaxFrameSize;
1716 for (; frag_count > 0; frag_count--) {
1717 next_rxd = src_rxd->rxd_next;
1718 rxd = HWM_GET_CURR_RXD(smc);
1720 skb = src_rxd->rxd_os.skb;
1721 if (skb == NULL) { // this should not happen
1723 pr_debug("Requeue with no skb in rxd!\n");
1724 skb = alloc_skb(MaxFrameSize + 3, GFP_ATOMIC);
1727 rxd->rxd_os.skb = skb;
1728 skb_reserve(skb, 3);
1729 skb_put(skb, MaxFrameSize);
1731 b_addr = pci_map_single(&smc->os.pdev,
1734 PCI_DMA_FROMDEVICE);
1735 rxd->rxd_os.dma_addr = b_addr;
1737 // no skb available, use local buffer
1738 pr_debug("Queueing invalid buffer!\n");
1739 rxd->rxd_os.skb = NULL;
1740 v_addr = smc->os.LocalRxBuffer;
1741 b_addr = smc->os.LocalRxBufferDMA;
1744 // we use skb from old rxd
1745 rxd->rxd_os.skb = skb;
1747 b_addr = pci_map_single(&smc->os.pdev,
1750 PCI_DMA_FROMDEVICE);
1751 rxd->rxd_os.dma_addr = b_addr;
1753 hwm_rx_frag(smc, v_addr, b_addr, MaxFrameSize,
1754 FIRST_FRAG | LAST_FRAG);
1758 } // mac_drv_requeue_rxd
1761 /************************
1765 * The hardware module calls this function at initialization time
1766 * to fill the RxD ring with receive buffers. It is also called by
1767 * mac_drv_rx_complete if rx_free is large enough to queue some new
1768 * receive buffers into the RxD ring. mac_drv_fill_rxd queues new
1769 * receive buffers as long as enough RxDs and receive buffers are
1772 * smc - A pointer to the SMT context struct.
1776 ************************/
1777 void mac_drv_fill_rxd(struct s_smc *smc)
1780 unsigned char *v_addr;
1781 unsigned long b_addr;
1782 struct sk_buff *skb;
1783 volatile struct s_smt_fp_rxd *rxd;
1785 pr_debug(KERN_INFO "entering mac_drv_fill_rxd\n");
1787 // Walk through the list of free receive buffers, passing receive
1788 // buffers to the HWM as long as RXDs are available.
1790 MaxFrameSize = smc->os.MaxFrameSize;
1791 // Check if there is any RXD left.
1792 while (HWM_GET_RX_FREE(smc) > 0) {
1793 pr_debug(KERN_INFO ".\n");
1795 rxd = HWM_GET_CURR_RXD(smc);
1796 skb = alloc_skb(MaxFrameSize + 3, GFP_ATOMIC);
1799 skb_reserve(skb, 3);
1800 skb_put(skb, MaxFrameSize);
1802 b_addr = pci_map_single(&smc->os.pdev,
1805 PCI_DMA_FROMDEVICE);
1806 rxd->rxd_os.dma_addr = b_addr;
1808 // no skb available, use local buffer
1809 // System has run out of buffer memory, but we want to
1810 // keep the receiver running in hope of better times.
1811 // Multiple descriptors may point to this local buffer,
1812 // so data in it must be considered invalid.
1813 pr_debug("Queueing invalid buffer!\n");
1814 v_addr = smc->os.LocalRxBuffer;
1815 b_addr = smc->os.LocalRxBufferDMA;
1818 rxd->rxd_os.skb = skb;
1820 // Pass receive buffer to HWM.
1821 hwm_rx_frag(smc, v_addr, b_addr, MaxFrameSize,
1822 FIRST_FRAG | LAST_FRAG);
1824 pr_debug(KERN_INFO "leaving mac_drv_fill_rxd\n");
1825 } // mac_drv_fill_rxd
1828 /************************
1832 * The hardware module calls this function to release unused
1835 * smc - A pointer to the SMT context struct.
1837 * rxd - A pointer to the first RxD which is used by the receive buffer.
1839 * frag_count - Count of RxDs used by the receive buffer.
1843 ************************/
1844 void mac_drv_clear_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
1848 struct sk_buff *skb;
1850 pr_debug("entering mac_drv_clear_rxd\n");
1852 if (frag_count != 1) // This is not allowed to happen.
1854 printk("fddi: Multi-fragment clear!\n");
1856 for (; frag_count > 0; frag_count--) {
1857 skb = rxd->rxd_os.skb;
1859 skfddi_priv *bp = &smc->os;
1860 int MaxFrameSize = bp->MaxFrameSize;
1862 pci_unmap_single(&bp->pdev, rxd->rxd_os.dma_addr,
1863 MaxFrameSize, PCI_DMA_FROMDEVICE);
1866 rxd->rxd_os.skb = NULL;
1868 rxd = rxd->rxd_next; // Next RXD.
1871 } // mac_drv_clear_rxd
1874 /************************
1878 * The hardware module calls this routine when an SMT or NSA frame of the
1879 * local SMT should be delivered to the LLC layer.
1881 * It is necessary to have this function, because there is no other way to
1882 * copy the contents of SMT MBufs into receive buffers.
1884 * mac_drv_rx_init allocates the required target memory for this frame,
1885 * and receives the frame fragment by fragment by calling mac_drv_rx_frag.
1887 * smc - A pointer to the SMT context struct.
1889 * len - The length (in bytes) of the received frame (FC, DA, SA, Data).
1891 * fc - The Frame Control field of the received frame.
1893 * look_ahead - A pointer to the lookahead data buffer (may be NULL).
1895 * la_len - The length of the lookahead data stored in the lookahead
1896 * buffer (may be zero).
1898 * Always returns zero (0).
1900 ************************/
1901 int mac_drv_rx_init(struct s_smc *smc, int len, int fc,
1902 char *look_ahead, int la_len)
1904 struct sk_buff *skb;
1906 pr_debug("entering mac_drv_rx_init(len=%d)\n", len);
1908 // "Received" a SMT or NSA frame of the local SMT.
1910 if (len != la_len || len < FDDI_MAC_HDR_LEN || !look_ahead) {
1911 pr_debug("fddi: Discard invalid local SMT frame\n");
1912 pr_debug(" len=%d, la_len=%d, (ULONG) look_ahead=%08lXh.\n",
1913 len, la_len, (unsigned long) look_ahead);
1916 skb = alloc_skb(len + 3, GFP_ATOMIC);
1918 pr_debug("fddi: Local SMT: skb memory exhausted.\n");
1921 skb_reserve(skb, 3);
1923 skb_copy_to_linear_data(skb, look_ahead, len);
1925 // deliver frame to system
1926 skb->protocol = fddi_type_trans(skb, smc->os.dev);
1930 } // mac_drv_rx_init
1933 /************************
1937 * This routine is called periodically by the SMT module to clean up the
1940 * Return any queued frames back to the upper protocol layers if the ring
1943 * smc - A pointer to the SMT context struct.
1947 ************************/
1948 void smt_timer_poll(struct s_smc *smc)
1953 /************************
1955 * ring_status_indication
1957 * This function indicates a change of the ring state.
1959 * smc - A pointer to the SMT context struct.
1961 * status - The current ring status.
1965 ************************/
1966 void ring_status_indication(struct s_smc *smc, u_long status)
1968 pr_debug("ring_status_indication( ");
1969 if (status & RS_RES15)
1970 pr_debug("RS_RES15 ");
1971 if (status & RS_HARDERROR)
1972 pr_debug("RS_HARDERROR ");
1973 if (status & RS_SOFTERROR)
1974 pr_debug("RS_SOFTERROR ");
1975 if (status & RS_BEACON)
1976 pr_debug("RS_BEACON ");
1977 if (status & RS_PATHTEST)
1978 pr_debug("RS_PATHTEST ");
1979 if (status & RS_SELFTEST)
1980 pr_debug("RS_SELFTEST ");
1981 if (status & RS_RES9)
1982 pr_debug("RS_RES9 ");
1983 if (status & RS_DISCONNECT)
1984 pr_debug("RS_DISCONNECT ");
1985 if (status & RS_RES7)
1986 pr_debug("RS_RES7 ");
1987 if (status & RS_DUPADDR)
1988 pr_debug("RS_DUPADDR ");
1989 if (status & RS_NORINGOP)
1990 pr_debug("RS_NORINGOP ");
1991 if (status & RS_VERSION)
1992 pr_debug("RS_VERSION ");
1993 if (status & RS_STUCKBYPASSS)
1994 pr_debug("RS_STUCKBYPASSS ");
1995 if (status & RS_EVENT)
1996 pr_debug("RS_EVENT ");
1997 if (status & RS_RINGOPCHANGE)
1998 pr_debug("RS_RINGOPCHANGE ");
1999 if (status & RS_RES0)
2000 pr_debug("RS_RES0 ");
2002 } // ring_status_indication
2005 /************************
2009 * Gets the current time from the system.
2013 * The current time in TICKS_PER_SECOND.
2015 * TICKS_PER_SECOND has the unit 'count of timer ticks per second'. It is
2016 * defined in "targetos.h". The definition of TICKS_PER_SECOND must comply
2017 * to the time returned by smt_get_time().
2019 ************************/
2020 unsigned long smt_get_time(void)
2026 /************************
2030 * Status counter update (ring_op, fifo full).
2032 * smc - A pointer to the SMT context struct.
2034 * stat - = 0: A ring operational change occurred.
2035 * = 1: The FORMAC FIFO buffer is full / FIFO overflow.
2039 ************************/
2040 void smt_stat_counter(struct s_smc *smc, int stat)
2042 // BOOLEAN RingIsUp ;
2044 pr_debug(KERN_INFO "smt_stat_counter\n");
2047 pr_debug(KERN_INFO "Ring operational change.\n");
2050 pr_debug(KERN_INFO "Receive fifo overflow.\n");
2051 smc->os.MacStat.gen.rx_errors++;
2054 pr_debug(KERN_INFO "Unknown status (%d).\n", stat);
2057 } // smt_stat_counter
2060 /************************
2064 * Sets CFM state in custom statistics.
2066 * smc - A pointer to the SMT context struct.
2068 * c_state - Possible values are:
2070 * EC0_OUT, EC1_IN, EC2_TRACE, EC3_LEAVE, EC4_PATH_TEST,
2071 * EC5_INSERT, EC6_CHECK, EC7_DEINSERT
2075 ************************/
2076 void cfm_state_change(struct s_smc *smc, int c_state)
2104 s = "SC10_C_WRAP_B";
2107 s = "SC11_C_WRAP_S";
2110 pr_debug(KERN_INFO "cfm_state_change: unknown %d\n", c_state);
2113 pr_debug(KERN_INFO "cfm_state_change: %s\n", s);
2114 #endif // DRIVERDEBUG
2115 } // cfm_state_change
2118 /************************
2122 * Sets ECM state in custom statistics.
2124 * smc - A pointer to the SMT context struct.
2126 * e_state - Possible values are:
2128 * SC0_ISOLATED, SC1_WRAP_A (5), SC2_WRAP_B (6), SC4_THRU_A (12),
2129 * SC5_THRU_B (7), SC7_WRAP_S (8)
2133 ************************/
2134 void ecm_state_change(struct s_smc *smc, int e_state)
2153 s = "EC4_PATH_TEST";
2168 pr_debug(KERN_INFO "ecm_state_change: %s\n", s);
2169 #endif //DRIVERDEBUG
2170 } // ecm_state_change
2173 /************************
2177 * Sets RMT state in custom statistics.
2179 * smc - A pointer to the SMT context struct.
2181 * r_state - Possible values are:
2183 * RM0_ISOLATED, RM1_NON_OP, RM2_RING_OP, RM3_DETECT,
2184 * RM4_NON_OP_DUP, RM5_RING_OP_DUP, RM6_DIRECTED, RM7_TRACE
2188 ************************/
2189 void rmt_state_change(struct s_smc *smc, int r_state)
2199 s = "RM1_NON_OP - not operational";
2202 s = "RM2_RING_OP - ring operational";
2205 s = "RM3_DETECT - detect dupl addresses";
2207 case RM4_NON_OP_DUP:
2208 s = "RM4_NON_OP_DUP - dupl. addr detected";
2210 case RM5_RING_OP_DUP:
2211 s = "RM5_RING_OP_DUP - ring oper. with dupl. addr";
2214 s = "RM6_DIRECTED - sending directed beacons";
2217 s = "RM7_TRACE - trace initiated";
2223 pr_debug(KERN_INFO "[rmt_state_change: %s]\n", s);
2224 #endif // DRIVERDEBUG
2225 } // rmt_state_change
2228 /************************
2230 * drv_reset_indication
2232 * This function is called by the SMT when it has detected a severe
2233 * hardware problem. The driver should perform a reset on the adapter
2234 * as soon as possible, but not from within this function.
2236 * smc - A pointer to the SMT context struct.
2240 ************************/
2241 void drv_reset_indication(struct s_smc *smc)
2243 pr_debug(KERN_INFO "entering drv_reset_indication\n");
2245 smc->os.ResetRequested = TRUE; // Set flag.
2247 } // drv_reset_indication
2249 static struct pci_driver skfddi_pci_driver = {
2251 .id_table = skfddi_pci_tbl,
2252 .probe = skfp_init_one,
2253 .remove = __devexit_p(skfp_remove_one),
2256 static int __init skfd_init(void)
2258 return pci_register_driver(&skfddi_pci_driver);
2261 static void __exit skfd_exit(void)
2263 pci_unregister_driver(&skfddi_pci_driver);
2266 module_init(skfd_init);
2267 module_exit(skfd_exit);