patch-2.2.18 linux/drivers/net/skfp/skfddi.c
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- Lines: 2615
- Date:
Fri Sep 1 13:48:23 2000
- Orig file:
v2.2.17/drivers/net/skfp/skfddi.c
- Orig date:
Thu Jan 1 01:00:00 1970
diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/net/skfp/skfddi.c linux/drivers/net/skfp/skfddi.c
@@ -0,0 +1,2614 @@
+/*
+ * File Name:
+ * skfddi.c
+ *
+ * Copyright Information:
+ * Copyright SysKonnect 1998,1999.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * The information in this file is provided "AS IS" without warranty.
+ *
+ * Abstract:
+ * A Linux device driver supporting the SysKonnect FDDI PCI controller
+ * familie.
+ *
+ * Maintainers:
+ * CG Christoph Goos (cgoos@syskonnect.de)
+ *
+ * Contributors:
+ * DM David S. Miller
+ * OT Oliver Teuber
+ *
+ * Address all questions to:
+ * linux@syskonnect.de
+ *
+ * The technical manual for the adapters is available from SysKonnect's
+ * web pages: www.syskonnect.com
+ * Goto "Support" and search Knowledge Base for "manual".
+ *
+ * Driver Architecture:
+ * The driver architecture is based on the DEC FDDI driver by
+ * Lawrence V. Stefani and several ethernet drivers.
+ * I also used an existing Windows NT miniport driver.
+ * All hardware dependant fuctions are handled by the SysKonnect
+ * Hardware Module.
+ * The only headerfiles that are directly related to this source
+ * are skfddi.c, h/types.h, h/osdef1st.h, h/targetos.h.
+ * The others belong to the SysKonnect FDDI Hardware Module and
+ * should better not be changed.
+ * NOTE:
+ * Compiling this driver produces some warnings, but I did not fix
+ * this, because the Hardware Module source is used for different
+ * drivers, and fixing it for Linux might bring problems on other
+ * projects. To keep the source common for all those drivers (and
+ * thus simplify fixes to it), please do not clean it up!
+ *
+ * Modification History:
+ * Date Name Description
+ * 02-Mar-98 CG Created.
+ *
+ * 10-Mar-99 CG Support for 2.2.x added.
+ * 25-Mar-99 CG Corrected IRQ routing for SMP (APIC)
+ * 26-Oct-99 CG Fixed compilation error on 2.2.13
+ * 12-Nov-99 CG Source code release
+ * 15-Dec-99 CG Removed some printk statements
+ * 11-Jan-2000 CG Fixed printk statements
+ * 21-Jan-2000 OT Added byte counter
+ * 07-May-2000 DM 64 bit fixes, new dma interface
+ * 18-Jul-2000 CG Submitted to 2.2.17 kernel source tree.
+ *
+ * Compilation options (-Dxxx):
+ * DRIVERDEBUG print lots of messages to log file
+ * DUMPPACKETS print received/transmitted packets to logfile
+ *
+ * Tested cpu architectures:
+ * - i386
+ * - sparc64
+ */
+
+/* Version information string - should be updated prior to */
+/* each new release!!! */
+#define VERSION "2.07"
+
+static const char *boot_msg =
+ "SysKonnect FDDI PCI Adapter driver v" VERSION " for\n"
+ " SK-55xx/SK-58xx adapters (SK-NET FDDI-FP/UP/LP)";
+
+/* Include files */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/malloc.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <asm/byteorder.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <linux/ctype.h> // isdigit
+
+#include <linux/netdevice.h>
+#include <linux/fddidevice.h>
+#include <linux/skbuff.h>
+
+#include "h/types.h"
+#undef ADDR // undo Linux definition
+#include "h/skfbi.h"
+#include "h/fddi.h"
+#include "h/smc.h"
+#include "h/smtstate.h"
+
+
+// Define global routines
+int skfp_probe(struct device *dev);
+
+
+// Define module-wide (static) routines
+static struct device *alloc_device(struct device *dev, u_long iobase);
+static struct device *insert_device(struct device *dev,
+ int (*init) (struct device *));
+static int fddi_dev_index(unsigned char *s);
+static void init_dev(struct device *dev, u_long iobase);
+static void link_modules(struct device *dev, struct device *tmp);
+static int skfp_driver_init(struct device *dev);
+static int skfp_open(struct device *dev);
+static int skfp_close(struct device *dev);
+static void skfp_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static struct enet_statistics *skfp_ctl_get_stats(struct device *dev);
+static void skfp_ctl_set_multicast_list(struct device *dev);
+static void skfp_ctl_set_multicast_list_wo_lock(struct device *dev);
+static int skfp_ctl_set_mac_address(struct device *dev, void *addr);
+static int skfp_ioctl(struct device *dev, struct ifreq *rq, int cmd);
+static int skfp_send_pkt(struct sk_buff *skb, struct device *dev);
+static void send_queued_packets(struct s_smc *smc);
+static void CheckSourceAddress(unsigned char *frame, unsigned char *hw_addr);
+static void ResetAdapter(struct s_smc *smc);
+
+
+// Functions needed by the hardware module
+void *mac_drv_get_space(struct s_smc *smc, u_int size);
+void *mac_drv_get_desc_mem(struct s_smc *smc, u_int size);
+unsigned long mac_drv_virt2phys(struct s_smc *smc, void *virt);
+unsigned long dma_master(struct s_smc *smc, void *virt, int len, int flag);
+void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr,
+ int flag);
+void mac_drv_tx_complete(struct s_smc *smc, volatile struct s_smt_fp_txd *txd);
+void llc_restart_tx(struct s_smc *smc);
+void mac_drv_rx_complete(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
+ int frag_count, int len);
+void mac_drv_requeue_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
+ int frag_count);
+void mac_drv_fill_rxd(struct s_smc *smc);
+void mac_drv_clear_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
+ int frag_count);
+int mac_drv_rx_init(struct s_smc *smc, int len, int fc, char *look_ahead,
+ int la_len);
+void smt_timer_poll(struct s_smc *smc);
+void ring_status_indication(struct s_smc *smc, u_long status);
+unsigned long smt_get_time(void);
+void smt_stat_counter(struct s_smc *smc, int stat);
+void cfm_state_change(struct s_smc *smc, int c_state);
+void ecm_state_change(struct s_smc *smc, int e_state);
+void pcm_state_change(struct s_smc *smc, int plc, int p_state);
+void rmt_state_change(struct s_smc *smc, int r_state);
+void drv_reset_indication(struct s_smc *smc);
+void dump_data(unsigned char *Data, int length);
+
+
+// External functions from the hardware module
+extern u_int mac_drv_check_space();
+extern void read_address(struct s_smc *smc, u_char * mac_addr);
+extern void card_stop(struct s_smc *smc);
+extern int mac_drv_init(struct s_smc *smc);
+extern void hwm_tx_frag(struct s_smc *smc, char far * virt, u_long phys,
+ int len, int frame_status);
+extern int hwm_tx_init(struct s_smc *smc, u_char fc, int frag_count,
+ int frame_len, int frame_status);
+extern int init_smt(struct s_smc *smc, u_char * mac_addr);
+extern void fddi_isr(struct s_smc *smc);
+extern void hwm_rx_frag(struct s_smc *smc, char far * virt, u_long phys,
+ int len, int frame_status);
+extern void mac_drv_rx_mode(struct s_smc *smc, int mode);
+extern void mac_drv_clear_tx_queue(struct s_smc *smc);
+extern void mac_drv_clear_rx_queue(struct s_smc *smc);
+extern void mac_clear_multicast(struct s_smc *smc);
+extern void enable_tx_irq(struct s_smc *smc, u_short queue);
+extern void mac_drv_clear_txd(struct s_smc *smc);
+
+
+// Define module-wide (static) variables
+
+static int num_boards = 0; /* total number of adapters configured */
+static int num_fddi = 0;
+static int autoprobed = 0;
+
+#ifdef MODULE
+int init_module(void);
+void cleanup_module(void);
+static struct device *unlink_modules(struct device *p);
+static int loading_module = 1;
+#else
+static int loading_module = 0;
+#endif // MODULE
+
+#ifdef DRIVERDEBUG
+#define PRINTK(s, args...) printk(s, ## args)
+#else
+#define PRINTK(s, args...)
+#endif // DRIVERDEBUG
+
+#define PRIV(dev) (&(((struct s_smc *)dev->priv)->os))
+
+/*
+ * ==============
+ * = skfp_probe =
+ * ==============
+ *
+ * Overview:
+ * Probes for supported FDDI PCI controllers
+ *
+ * Returns:
+ * Condition code
+ *
+ * Arguments:
+ * dev - pointer to device information
+ *
+ * Functional Description:
+ * This routine is called by the OS for each FDDI device name (fddi0,
+ * fddi1,...,fddi6, fddi7) specified in drivers/net/Space.c.
+ * If loaded as a module, it will detect and initialize all
+ * adapters the first time it is called.
+ *
+ * Let's say that skfp_probe() is getting called to initialize fddi0.
+ * Furthermore, let's say there are three supported controllers in the
+ * system. Before skfp_probe() leaves, devices fddi0, fddi1, and fddi2
+ * will be initialized and a global flag will be set to indicate that
+ * skfp_probe() has already been called.
+ *
+ * However...the OS doesn't know that we've already initialized
+ * devices fddi1 and fddi2 so skfp_probe() gets called again and again
+ * until it reaches the end of the device list for FDDI (presently,
+ * fddi7). It's important that the driver "pretend" to probe for
+ * devices fddi1 and fddi2 and return success. Devices fddi3
+ * through fddi7 will return failure since they weren't initialized.
+ *
+ * This algorithm seems to work for the time being. As other FDDI
+ * drivers are written for Linux, a more generic approach (perhaps
+ * similar to the Ethernet card approach) may need to be implemented.
+ *
+ * Return Codes:
+ * 0 - This device (fddi0, fddi1, etc) configured successfully
+ * -ENODEV - No devices present, or no SysKonnect FDDI PCI device
+ * present for this device name
+ *
+ *
+ * Side Effects:
+ * Device structures for FDDI adapters (fddi0, fddi1, etc) are
+ * initialized and the board resources are read and stored in
+ * the device structure.
+ */
+int skfp_probe(struct device *dev)
+{
+ int i; /* used in for loops */
+ struct pci_dev *pdev = NULL; /* PCI device structure */
+#ifndef MEM_MAPPED_IO
+ u16 port; /* temporary I/O (port) address */
+ int port_len; /* length of port address range (in bytes) */
+#else
+ unsigned long port;
+#endif
+ u16 command; /* PCI Configuration space Command register val */
+ struct s_smc *smc; /* board pointer */
+ struct device *tmp = dev;
+ u8 first_dev_used = 0;
+ u16 SubSysId;
+#ifdef __sparc_v9__
+ unsigned short pci_tmp;
+#endif
+
+ PRINTK(KERN_INFO "entering skfp_probe\n");
+
+ /*
+ * Verify whether we're going through skfp_probe() again
+ *
+ * If so, see if we're going through for a subsequent fddi device that
+ * we've already initialized. If we are, return success (0). If not,
+ * return failure (-ENODEV).
+ */
+
+ if (autoprobed) {
+ PRINTK(KERN_INFO "Already entered skfp_probe\n");
+ if (dev != NULL) {
+ if ((strncmp(dev->name, "fddi", 4) == 0) &&
+ (dev->base_addr != 0)) {
+ return (0);
+ }
+ return (-ENODEV);
+ }
+ }
+ autoprobed = 1; /* set global flag */
+
+ printk("%s\n", boot_msg);
+
+ /* Scan for Syskonnect FDDI PCI controllers */
+ if (!pci_present()) { /* is PCI BIOS even present? */
+ printk("no PCI BIOS present\n");
+ return (-ENODEV);
+ }
+ for (i = 0; i < SKFP_MAX_NUM_BOARDS; i++) { // scan for PCI cards
+ PRINTK(KERN_INFO "Check device %d\n", i);
+ if ((pdev=pci_find_device(PCI_VENDOR_ID_SK, PCI_DEVICE_ID_SK_FP,
+ pdev)) == 0) {
+ break;
+ }
+
+#ifndef MEM_MAPPED_IO
+ /* Verify that I/O enable bit is set (PCI slot is enabled) */
+ pci_read_config_word(pdev, PCI_COMMAND, &command);
+ if ((command & PCI_COMMAND_IO) == 0) {
+ PRINTK("I/O enable bit not set!");
+ PRINTK(" Verify that slot is enabled\n");
+ continue;
+ }
+
+ /* Turn off memory mapped space and enable mastering */
+
+ PRINTK(KERN_INFO "Command Reg: %04x\n", command);
+ command |= PCI_COMMAND_MASTER;
+ command &= ~PCI_COMMAND_MEMORY;
+ pci_write_config_word(pdev, PCI_COMMAND, command);
+
+ /* Read I/O base address from PCI Configuration Space */
+
+ pci_read_config_word(pdev, PCI_BASE_ADDRESS_1, &port);
+ port &= PCI_BASE_ADDRESS_IO_MASK; // clear I/O bit (bit 0)
+
+ /* Verify port address range is not already being used */
+
+ port_len = FP_IO_LEN;
+ if (check_region(port, port_len) != 0) {
+ printk("I/O range allocated to adapter");
+ printk(" (0x%X-0x%X) is already being used!\n", port,
+ (port + port_len - 1));
+ continue;
+ }
+#else
+ /* Verify that MEM enable bit is set (PCI slot is enabled) */
+ pci_read_config_word(pdev, PCI_COMMAND, &command);
+ if ((command & PCI_COMMAND_MEMORY) == 0) {
+ PRINTK("MEMORY-I/O enable bit not set!");
+ PRINTK(" Verify that slot is enabled\n");
+ continue;
+ }
+
+ pci_set_master(pdev);
+
+#ifdef __sparc_v9__
+ /* SPARC machines do not initialize the cache line size */
+ pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 64);
+ /* SPARC machines do not set "Memory write and invalidate" */
+ pci_read_config_word(pdev, PCI_COMMAND, &pci_tmp);
+ pci_tmp |= PCI_COMMAND_INVALIDATE;
+ pci_write_config_word(pdev, PCI_COMMAND, pci_tmp);
+#endif
+
+ port = pdev->base_address[0];
+ port &= PCI_BASE_ADDRESS_MEM_MASK;
+
+#ifndef __sparc_v9__
+ port = (unsigned long)ioremap(port, 0x4000);
+#else
+ /* workaround for bug in 2.2 kernel for sparcv9 */
+ /* use port as is */
+#endif
+ if (!port){
+ printk("skfp: Unable to map MEMORY register, "
+ "FDDI adapter will be disabled.\n");
+ break;
+ }
+#endif
+
+ if ((!loading_module) || first_dev_used) {
+ /* Allocate a device structure for this adapter */
+ tmp = alloc_device(dev, port);
+ }
+ first_dev_used = 1; // only significant first time
+
+ pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &SubSysId);
+
+ if (tmp != NULL) {
+ if (loading_module)
+ link_modules(dev, tmp);
+ dev = tmp;
+ init_dev(dev, port);
+ dev->irq = pdev->irq;
+
+ /* Initialize board structure with bus-specific info */
+
+ smc = (struct s_smc *) dev->priv;
+ smc->os.dev = dev;
+ smc->os.bus_type = SK_BUS_TYPE_PCI;
+ smc->os.pdev = *pdev;
+ smc->os.QueueSkb = MAX_TX_QUEUE_LEN;
+ smc->os.MaxFrameSize = MAX_FRAME_SIZE;
+ smc->os.dev = dev;
+ smc->hw.slot = -1;
+ smc->os.ResetRequested = FALSE;
+ skb_queue_head_init(&smc->os.SendSkbQueue);
+
+ if (skfp_driver_init(dev) == 0) {
+ // only increment global board
+ // count on success
+ num_boards++;
+ request_region(dev->base_addr,
+ FP_IO_LEN, dev->name);
+ if ((SubSysId & 0xff00) == 0x5500 ||
+ (SubSysId & 0xff00) == 0x5800) {
+ printk("%s: SysKonnect FDDI PCI adapter"
+ " found (SK-%04X)\n", dev->name,
+ SubSysId);
+ } else {
+ printk("%s: FDDI PCI adapter found\n",
+ dev->name);
+ }
+ } else {
+ kfree(dev);
+ i = SKFP_MAX_NUM_BOARDS; // stop search
+
+ }
+
+ } // if (dev != NULL)
+
+ } // for SKFP_MAX_NUM_BOARDS
+
+ /*
+ * If we're at this point we're going through skfp_probe() for the
+ * first time. Return success (0) if we've initialized 1 or more
+ * boards. Otherwise, return failure (-ENODEV).
+ */
+
+ if (num_boards > 0)
+ return (0);
+ else {
+ printk("no SysKonnect FDDI adapter found\n");
+ return (-ENODEV);
+ }
+} // skfp_probe
+
+
+/************************
+ *
+ * Search the entire 'fddi' device list for a fixed probe. If a match isn't
+ * found then check for an autoprobe or unused device location. If they
+ * are not available then insert a new device structure at the end of
+ * the current list.
+ *
+ ************************/
+static struct device *alloc_device(struct device *dev, u_long iobase)
+{
+ struct device *adev = NULL;
+ int fixed = 0, new_dev = 0;
+
+ PRINTK(KERN_INFO "entering alloc_device\n");
+ if (!dev)
+ return dev;
+
+ num_fddi = fddi_dev_index(dev->name);
+ if (loading_module) {
+ num_fddi++;
+ dev = insert_device(dev, skfp_probe);
+ return dev;
+ }
+ while (1) {
+ if (((dev->base_addr == NO_ADDRESS) ||
+ (dev->base_addr == 0)) && !adev) {
+ adev = dev;
+ } else if ((dev->priv == NULL) && (dev->base_addr == iobase)) {
+ fixed = 1;
+ } else {
+ if (dev->next == NULL) {
+ new_dev = 1;
+ } else if (strncmp(dev->next->name, "fddi", 4) != 0) {
+ new_dev = 1;
+ }
+ }
+ if ((dev->next == NULL) || new_dev || fixed)
+ break;
+ dev = dev->next;
+ num_fddi++;
+ } // while (1)
+
+ if (adev && !fixed) {
+ dev = adev;
+ num_fddi = fddi_dev_index(dev->name);
+ new_dev = 0;
+ }
+ if (((dev->next == NULL) && ((dev->base_addr != NO_ADDRESS) &&
+ (dev->base_addr != 0)) && !fixed) ||
+ new_dev) {
+ num_fddi++; /* New device */
+ dev = insert_device(dev, skfp_probe);
+ }
+ if (dev) {
+ if (!dev->priv) {
+ /* Allocate space for private board structure */
+ dev->priv = (void *) kmalloc(sizeof(struct s_smc),
+ GFP_KERNEL);
+ if (dev->priv == NULL) {
+ printk("%s: Could not allocate memory for",
+ dev->name);
+ printk(" private board structure!\n");
+ return (NULL);
+ }
+ /* clear structure */
+ memset(dev->priv, 0, sizeof(struct s_smc));
+ }
+ }
+ return dev;
+} // alloc_device
+
+
+
+/************************
+ *
+ * Initialize device structure
+ *
+ ************************/
+static void init_dev(struct device *dev, u_long iobase)
+{
+ /* Initialize new device structure */
+
+ dev->rmem_end = 0; /* shared memory isn't used */
+ dev->rmem_start = 0; /* shared memory isn't used */
+ dev->mem_end = 0; /* shared memory isn't used */
+ dev->mem_start = 0; /* shared memory isn't used */
+ dev->base_addr = iobase; /* save port (I/O) base address */
+ dev->irq = 0; /* set in skfp_driver_init() */
+ dev->if_port = 0; /* not applicable to FDDI adapters */
+ dev->dma = 0; /* Bus Master DMA doesn't require channel */
+ dev->interrupt = 0;
+
+ dev->get_stats = &skfp_ctl_get_stats;
+ dev->open = &skfp_open;
+ dev->stop = &skfp_close;
+ dev->hard_start_xmit = &skfp_send_pkt;
+ dev->hard_header = NULL; /* set in fddi_setup() */
+ dev->rebuild_header = NULL; /* set in fddi_setup() */
+ dev->set_multicast_list = &skfp_ctl_set_multicast_list;
+ dev->set_mac_address = &skfp_ctl_set_mac_address;
+ dev->do_ioctl = &skfp_ioctl;
+ dev->set_config = NULL; /* not supported for now &&& */
+ dev->header_cache_update = NULL; /* not supported */
+ dev->change_mtu = NULL; /* set in fddi_setup() */
+
+ /* Initialize remaining device structure information */
+ fddi_setup(dev);
+} // init_device
+
+
+/************************
+ *
+ * If at end of fddi device list and can't use current entry, malloc
+ * one up. If memory could not be allocated, print an error message.
+ *
+************************/
+static struct device *insert_device(struct device *dev,
+ int (*init) (struct device *))
+{
+ struct device *new;
+ int len;
+
+ PRINTK(KERN_INFO "entering insert_device\n");
+ len = sizeof(struct device) + sizeof(struct s_smc);
+ new = (struct device *) kmalloc(len, GFP_KERNEL);
+ if (new == NULL) {
+ printk("fddi%d: Device not initialised, insufficient memory\n",
+ num_fddi);
+ return NULL;
+ } else {
+ memset((char *) new, 0, len);
+ new->name = (char *) (new + 1);
+ new->priv = (struct s_smc *) (new->name + 8);
+ new->init = init; /* initialisation routine */
+ if (!loading_module) {
+ new->next = dev->next;
+ dev->next = new;
+ }
+ /* create new device name */
+ if (num_fddi > 999) {
+ sprintf(new->name, "fddi????");
+ } else {
+ sprintf(new->name, "fddi%d", num_fddi);
+ }
+ }
+ return new;
+} // insert_device
+
+
+/************************
+ *
+ * Get the number of a "fddiX" string
+ *
+ ************************/
+static int fddi_dev_index(unsigned char *s)
+{
+ int i = 0, j = 0;
+
+ for (; *s; s++) {
+ if (isdigit(*s)) {
+ j = 1;
+ i = (i * 10) + (*s - '0');
+ } else if (j)
+ break;
+ }
+ return i;
+} // fddi_dev_index
+
+
+/************************
+ *
+ * Used if loaded as module only. Link the device structures
+ * together. Needed to release them all at unload.
+ *
+************************/
+static void link_modules(struct device *dev, struct device *tmp)
+{
+ struct device *p = dev;
+
+ if (p) {
+ while (((struct s_smc *) (p->priv))->os.next_module) {
+ p = ((struct s_smc *) (p->priv))->os.next_module;
+ }
+
+ if (dev != tmp) {
+ ((struct s_smc *) (p->priv))->os.next_module = tmp;
+ } else {
+ ((struct s_smc *) (p->priv))->os.next_module = NULL;
+ }
+ }
+ return;
+} // link_modules
+
+
+
+/*
+ * ====================
+ * = skfp_driver_init =
+ * ====================
+ *
+ * Overview:
+ * Initializes remaining adapter board structure information
+ * and makes sure adapter is in a safe state prior to skfp_open().
+ *
+ * Returns:
+ * Condition code
+ *
+ * Arguments:
+ * dev - pointer to device information
+ *
+ * Functional Description:
+ * This function allocates additional resources such as the host memory
+ * blocks needed by the adapter.
+ * The adapter is also reset. The OS must call skfp_open() to open
+ * the adapter and bring it on-line.
+ *
+ * Return Codes:
+ * 0 - initialization succeeded
+ * -1 - initialization failed
+ */
+static int skfp_driver_init(struct device *dev)
+{
+ struct s_smc *smc = (struct s_smc *) dev->priv;
+ skfddi_priv *bp = PRIV(dev);
+ u8 val; /* used for I/O read/writes */
+
+ PRINTK(KERN_INFO "entering skfp_driver_init\n");
+
+ // set the io address in private structures
+ bp->base_addr = dev->base_addr;
+ smc->hw.iop = dev->base_addr;
+
+ // Get the interrupt level from the PCI Configuration Table
+ val = dev->irq;
+
+ smc->hw.irq = val;
+
+ spin_lock_init(&bp->DriverLock);
+
+ // Determine the required size of the 'shared' memory area.
+ bp->SharedMemSize = mac_drv_check_space();
+ PRINTK(KERN_INFO "Memory for HWM: %ld\n", bp->SharedMemSize);
+ if (bp->SharedMemSize > 0) {
+ bp->SharedMemSize += 16; // for descriptor alignment
+
+ bp->SharedMemAddr = kmalloc(bp->SharedMemSize, GFP_KERNEL);
+ if (!bp->SharedMemSize) {
+ printk("could not allocate mem for ");
+ printk("hardware module: %ld byte\n",
+ bp->SharedMemSize);
+ return (-1);
+ }
+ bp->SharedMemHeap = 0; // Nothing used yet.
+
+ } else {
+ bp->SharedMemAddr = NULL;
+ bp->SharedMemHeap = 0;
+ } // SharedMemSize > 0
+
+ memset(bp->SharedMemAddr, 0, bp->SharedMemSize);
+
+ card_stop(smc); // Reset adapter.
+
+ PRINTK(KERN_INFO "mac_drv_init()..\n");
+ if (mac_drv_init(smc) != 0) {
+ PRINTK(KERN_INFO "mac_drv_init() failed.\n");
+ return (-1);
+ }
+ read_address(smc, NULL);
+ PRINTK(KERN_INFO "HW-Addr: %02x %02x %02x %02x %02x %02x\n",
+ smc->hw.fddi_canon_addr.a[0],
+ smc->hw.fddi_canon_addr.a[1],
+ smc->hw.fddi_canon_addr.a[2],
+ smc->hw.fddi_canon_addr.a[3],
+ smc->hw.fddi_canon_addr.a[4],
+ smc->hw.fddi_canon_addr.a[5]);
+ memcpy(dev->dev_addr, smc->hw.fddi_canon_addr.a, 6);
+
+ smt_reset_defaults(smc, 0);
+
+ return (0);
+} // skfp_driver_init
+
+
+/*
+ * =============
+ * = skfp_open =
+ * =============
+ *
+ * Overview:
+ * Opens the adapter
+ *
+ * Returns:
+ * Condition code
+ *
+ * Arguments:
+ * dev - pointer to device information
+ *
+ * Functional Description:
+ * This function brings the adapter to an operational state.
+ *
+ * Return Codes:
+ * 0 - Adapter was successfully opened
+ * -EAGAIN - Could not register IRQ
+ */
+static int skfp_open(struct device *dev)
+{
+ struct s_smc *smc = (struct s_smc *) dev->priv;
+
+ PRINTK(KERN_INFO "entering skfp_open\n");
+ /* Register IRQ - support shared interrupts by passing device ptr */
+ if (request_irq(dev->irq, (void *) skfp_interrupt, SA_SHIRQ,
+ dev->name, dev)) {
+ printk("%s: Requested IRQ %d is busy\n", dev->name, dev->irq);
+ return (-EAGAIN);
+ }
+ /*
+ * Set current address to factory MAC address
+ *
+ * Note: We've already done this step in skfp_driver_init.
+ * However, it's possible that a user has set a node
+ * address override, then closed and reopened the
+ * adapter. Unless we reset the device address field
+ * now, we'll continue to use the existing modified
+ * address.
+ */
+ read_address(smc, NULL);
+ memcpy(dev->dev_addr, smc->hw.fddi_canon_addr.a, 6);
+
+ init_smt(smc, NULL);
+ smt_online(smc, 1);
+ STI_FBI();
+
+ MOD_INC_USE_COUNT;
+
+ /* Set device structure info */
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ dev->start = 1;
+
+ /* Clear local multicast address tables */
+ mac_clear_multicast(smc);
+
+ /* Disable promiscuous filter settings */
+ mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);
+
+ return (0);
+} // skfp_open
+
+
+/*
+ * ==============
+ * = skfp_close =
+ * ==============
+ *
+ * Overview:
+ * Closes the device/module.
+ *
+ * Returns:
+ * Condition code
+ *
+ * Arguments:
+ * dev - pointer to device information
+ *
+ * Functional Description:
+ * This routine closes the adapter and brings it to a safe state.
+ * The interrupt service routine is deregistered with the OS.
+ * The adapter can be opened again with another call to skfp_open().
+ *
+ * Return Codes:
+ * Always return 0.
+ *
+ * Assumptions:
+ * No further requests for this adapter are made after this routine is
+ * called. skfp_open() can be called to reset and reinitialize the
+ * adapter.
+ */
+static int skfp_close(struct device *dev)
+{
+ struct s_smc *smc = (struct s_smc *) dev->priv;
+ struct sk_buff *skb;
+ skfddi_priv *bp = PRIV(dev);
+
+ CLI_FBI();
+ smt_reset_defaults(smc, 1);
+ card_stop(smc);
+ mac_drv_clear_tx_queue(smc);
+ mac_drv_clear_rx_queue(smc);
+
+ /* Clear device structure flags */
+ dev->start = 0;
+ dev->tbusy = 1;
+
+ /* Deregister (free) IRQ */
+ free_irq(dev->irq, dev);
+
+ for (;;) {
+ skb = skb_dequeue(&bp->SendSkbQueue);
+ if (skb == NULL)
+ break;
+ bp->QueueSkb++;
+ dev_kfree_skb(skb);
+ }
+
+ MOD_DEC_USE_COUNT;
+
+ return (0);
+} // skfp_close
+
+
+/*
+ * ==================
+ * = skfp_interrupt =
+ * ==================
+ *
+ * Overview:
+ * Interrupt processing routine
+ *
+ * Returns:
+ * None
+ *
+ * Arguments:
+ * irq - interrupt vector
+ * dev_id - pointer to device information
+ * regs - pointer to registers structure
+ *
+ * Functional Description:
+ * This routine calls the interrupt processing routine for this adapter. It
+ * disables and reenables adapter interrupts, as appropriate. We can support
+ * shared interrupts since the incoming dev_id pointer provides our device
+ * structure context. All the real work is done in the hardware module.
+ *
+ * Return Codes:
+ * None
+ *
+ * Assumptions:
+ * The interrupt acknowledgement at the hardware level (eg. ACKing the PIC
+ * on Intel-based systems) is done by the operating system outside this
+ * routine.
+ *
+ * System interrupts are enabled through this call.
+ *
+ * Side Effects:
+ * Interrupts are disabled, then reenabled at the adapter.
+ */
+
+void skfp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct device *dev = (struct device *) dev_id;
+ struct s_smc *smc; /* private board structure pointer */
+ skfddi_priv *bp = PRIV(dev);
+
+
+ if (dev == NULL) {
+ printk("%s: ERROR: irq %d for unknown device\n", dev->name, irq);
+ return;
+ }
+ if (dev->interrupt) {
+ printk("%s: ERROR: reentering interrupt handler\n", dev->name);
+ }
+ dev->interrupt = 1;
+
+ smc = (struct s_smc *) dev->priv;
+
+ // IRQs enabled or disabled ?
+ if (inpd(ADDR(B0_IMSK)) == 0) {
+ // IRQs are disabled.
+ // printk(KERN_INFO "Foreign IRQ (B).\n");
+ dev->interrupt = 0;
+ return;
+ }
+ // Note: At this point, IRQs are enabled.
+ if ((inpd(ISR_A) & smc->hw.is_imask) == 0) { // IRQ?
+ // Adapter did not issue an IRQ.
+ // printk(KERN_INFO "Foreign IRQ (C).\n");
+ dev->interrupt = 0;
+ return;
+ }
+ CLI_FBI(); // Disable IRQs from our adapter.
+ spin_lock(&bp->DriverLock);
+
+ // Call interrupt handler in hardware module (HWM).
+ fddi_isr(smc);
+
+ if (smc->os.ResetRequested) {
+ ResetAdapter(smc);
+ smc->os.ResetRequested = FALSE;
+ }
+ dev->interrupt = 0;
+ spin_unlock(&bp->DriverLock);
+ STI_FBI(); // Enable IRQs from our adapter.
+
+ return;
+} // skfp_interrupt
+
+
+/*
+ * ======================
+ * = skfp_ctl_get_stats =
+ * ======================
+ *
+ * Overview:
+ * Get statistics for FDDI adapter
+ *
+ * Returns:
+ * Pointer to FDDI statistics structure
+ *
+ * Arguments:
+ * dev - pointer to device information
+ *
+ * Functional Description:
+ * Gets current MIB objects from adapter, then
+ * returns FDDI statistics structure as defined
+ * in if_fddi.h.
+ *
+ * Note: Since the FDDI statistics structure is
+ * still new and the device structure doesn't
+ * have an FDDI-specific get statistics handler,
+ * we'll return the FDDI statistics structure as
+ * a pointer to an Ethernet statistics structure.
+ * That way, at least the first part of the statistics
+ * structure can be decoded properly.
+ * We'll have to pay attention to this routine as the
+ * device structure becomes more mature and LAN media
+ * independent.
+ *
+ */
+struct enet_statistics *skfp_ctl_get_stats(struct device *dev)
+{
+ struct s_smc *bp = (struct s_smc *) dev->priv;
+
+ /* Fill the bp->stats structure with driver-maintained counters */
+
+ bp->os.MacStat.port_bs_flag[0] = 0x1234;
+ bp->os.MacStat.port_bs_flag[1] = 0x5678;
+// goos: need to fill out fddi statistic
+#if 0
+ /* Get FDDI SMT MIB objects */
+
+/* Fill the bp->stats structure with the SMT MIB object values */
+
+ 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));
+ bp->stats.smt_op_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_op_version_id;
+ bp->stats.smt_hi_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_hi_version_id;
+ bp->stats.smt_lo_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_lo_version_id;
+ 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));
+ bp->stats.smt_mib_version_id = bp->cmd_rsp_virt->smt_mib_get.smt_mib_version_id;
+ bp->stats.smt_mac_cts = bp->cmd_rsp_virt->smt_mib_get.smt_mac_ct;
+ bp->stats.smt_non_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_non_master_ct;
+ bp->stats.smt_master_cts = bp->cmd_rsp_virt->smt_mib_get.smt_master_ct;
+ bp->stats.smt_available_paths = bp->cmd_rsp_virt->smt_mib_get.smt_available_paths;
+ bp->stats.smt_config_capabilities = bp->cmd_rsp_virt->smt_mib_get.smt_config_capabilities;
+ bp->stats.smt_config_policy = bp->cmd_rsp_virt->smt_mib_get.smt_config_policy;
+ bp->stats.smt_connection_policy = bp->cmd_rsp_virt->smt_mib_get.smt_connection_policy;
+ bp->stats.smt_t_notify = bp->cmd_rsp_virt->smt_mib_get.smt_t_notify;
+ bp->stats.smt_stat_rpt_policy = bp->cmd_rsp_virt->smt_mib_get.smt_stat_rpt_policy;
+ bp->stats.smt_trace_max_expiration = bp->cmd_rsp_virt->smt_mib_get.smt_trace_max_expiration;
+ bp->stats.smt_bypass_present = bp->cmd_rsp_virt->smt_mib_get.smt_bypass_present;
+ bp->stats.smt_ecm_state = bp->cmd_rsp_virt->smt_mib_get.smt_ecm_state;
+ bp->stats.smt_cf_state = bp->cmd_rsp_virt->smt_mib_get.smt_cf_state;
+ bp->stats.smt_remote_disconnect_flag = bp->cmd_rsp_virt->smt_mib_get.smt_remote_disconnect_flag;
+ bp->stats.smt_station_status = bp->cmd_rsp_virt->smt_mib_get.smt_station_status;
+ bp->stats.smt_peer_wrap_flag = bp->cmd_rsp_virt->smt_mib_get.smt_peer_wrap_flag;
+ bp->stats.smt_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_msg_time_stamp.ls;
+ bp->stats.smt_transition_time_stamp = bp->cmd_rsp_virt->smt_mib_get.smt_transition_time_stamp.ls;
+ bp->stats.mac_frame_status_functions = bp->cmd_rsp_virt->smt_mib_get.mac_frame_status_functions;
+ bp->stats.mac_t_max_capability = bp->cmd_rsp_virt->smt_mib_get.mac_t_max_capability;
+ bp->stats.mac_tvx_capability = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_capability;
+ bp->stats.mac_available_paths = bp->cmd_rsp_virt->smt_mib_get.mac_available_paths;
+ bp->stats.mac_current_path = bp->cmd_rsp_virt->smt_mib_get.mac_current_path;
+ memcpy(bp->stats.mac_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_upstream_nbr, FDDI_K_ALEN);
+ memcpy(bp->stats.mac_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_downstream_nbr, FDDI_K_ALEN);
+ memcpy(bp->stats.mac_old_upstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_upstream_nbr, FDDI_K_ALEN);
+ memcpy(bp->stats.mac_old_downstream_nbr, &bp->cmd_rsp_virt->smt_mib_get.mac_old_downstream_nbr, FDDI_K_ALEN);
+ bp->stats.mac_dup_address_test = bp->cmd_rsp_virt->smt_mib_get.mac_dup_address_test;
+ bp->stats.mac_requested_paths = bp->cmd_rsp_virt->smt_mib_get.mac_requested_paths;
+ bp->stats.mac_downstream_port_type = bp->cmd_rsp_virt->smt_mib_get.mac_downstream_port_type;
+ memcpy(bp->stats.mac_smt_address, &bp->cmd_rsp_virt->smt_mib_get.mac_smt_address, FDDI_K_ALEN);
+ bp->stats.mac_t_req = bp->cmd_rsp_virt->smt_mib_get.mac_t_req;
+ bp->stats.mac_t_neg = bp->cmd_rsp_virt->smt_mib_get.mac_t_neg;
+ bp->stats.mac_t_max = bp->cmd_rsp_virt->smt_mib_get.mac_t_max;
+ bp->stats.mac_tvx_value = bp->cmd_rsp_virt->smt_mib_get.mac_tvx_value;
+ bp->stats.mac_frame_error_threshold = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_threshold;
+ bp->stats.mac_frame_error_ratio = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_ratio;
+ bp->stats.mac_rmt_state = bp->cmd_rsp_virt->smt_mib_get.mac_rmt_state;
+ bp->stats.mac_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_da_flag;
+ bp->stats.mac_una_da_flag = bp->cmd_rsp_virt->smt_mib_get.mac_unda_flag;
+ bp->stats.mac_frame_error_flag = bp->cmd_rsp_virt->smt_mib_get.mac_frame_error_flag;
+ bp->stats.mac_ma_unitdata_available = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_available;
+ bp->stats.mac_hardware_present = bp->cmd_rsp_virt->smt_mib_get.mac_hardware_present;
+ bp->stats.mac_ma_unitdata_enable = bp->cmd_rsp_virt->smt_mib_get.mac_ma_unitdata_enable;
+ bp->stats.path_tvx_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_tvx_lower_bound;
+ bp->stats.path_t_max_lower_bound = bp->cmd_rsp_virt->smt_mib_get.path_t_max_lower_bound;
+ bp->stats.path_max_t_req = bp->cmd_rsp_virt->smt_mib_get.path_max_t_req;
+ memcpy(bp->stats.path_configuration, &bp->cmd_rsp_virt->smt_mib_get.path_configuration, sizeof(bp->cmd_rsp_virt->smt_mib_get.path_configuration));
+ bp->stats.port_my_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[0];
+ bp->stats.port_my_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_my_type[1];
+ bp->stats.port_neighbor_type[0] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[0];
+ bp->stats.port_neighbor_type[1] = bp->cmd_rsp_virt->smt_mib_get.port_neighbor_type[1];
+ bp->stats.port_connection_policies[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[0];
+ bp->stats.port_connection_policies[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_policies[1];
+ bp->stats.port_mac_indicated[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[0];
+ bp->stats.port_mac_indicated[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_indicated[1];
+ bp->stats.port_current_path[0] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[0];
+ bp->stats.port_current_path[1] = bp->cmd_rsp_virt->smt_mib_get.port_current_path[1];
+ memcpy(&bp->stats.port_requested_paths[0 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[0], 3);
+ memcpy(&bp->stats.port_requested_paths[1 * 3], &bp->cmd_rsp_virt->smt_mib_get.port_requested_paths[1], 3);
+ bp->stats.port_mac_placement[0] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[0];
+ bp->stats.port_mac_placement[1] = bp->cmd_rsp_virt->smt_mib_get.port_mac_placement[1];
+ bp->stats.port_available_paths[0] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[0];
+ bp->stats.port_available_paths[1] = bp->cmd_rsp_virt->smt_mib_get.port_available_paths[1];
+ bp->stats.port_pmd_class[0] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[0];
+ bp->stats.port_pmd_class[1] = bp->cmd_rsp_virt->smt_mib_get.port_pmd_class[1];
+ bp->stats.port_connection_capabilities[0] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[0];
+ bp->stats.port_connection_capabilities[1] = bp->cmd_rsp_virt->smt_mib_get.port_connection_capabilities[1];
+ bp->stats.port_bs_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[0];
+ bp->stats.port_bs_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_bs_flag[1];
+ bp->stats.port_ler_estimate[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[0];
+ bp->stats.port_ler_estimate[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_estimate[1];
+ bp->stats.port_ler_cutoff[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[0];
+ bp->stats.port_ler_cutoff[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_cutoff[1];
+ bp->stats.port_ler_alarm[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[0];
+ bp->stats.port_ler_alarm[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_alarm[1];
+ bp->stats.port_connect_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[0];
+ bp->stats.port_connect_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_connect_state[1];
+ bp->stats.port_pcm_state[0] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[0];
+ bp->stats.port_pcm_state[1] = bp->cmd_rsp_virt->smt_mib_get.port_pcm_state[1];
+ bp->stats.port_pc_withhold[0] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[0];
+ bp->stats.port_pc_withhold[1] = bp->cmd_rsp_virt->smt_mib_get.port_pc_withhold[1];
+ bp->stats.port_ler_flag[0] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[0];
+ bp->stats.port_ler_flag[1] = bp->cmd_rsp_virt->smt_mib_get.port_ler_flag[1];
+ bp->stats.port_hardware_present[0] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[0];
+ bp->stats.port_hardware_present[1] = bp->cmd_rsp_virt->smt_mib_get.port_hardware_present[1];
+
+
+ /* Fill the bp->stats structure with the FDDI counter values */
+
+ bp->stats.mac_frame_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.frame_cnt.ls;
+ bp->stats.mac_copied_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.copied_cnt.ls;
+ bp->stats.mac_transmit_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.transmit_cnt.ls;
+ bp->stats.mac_error_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.error_cnt.ls;
+ bp->stats.mac_lost_cts = bp->cmd_rsp_virt->cntrs_get.cntrs.lost_cnt.ls;
+ bp->stats.port_lct_fail_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[0].ls;
+ bp->stats.port_lct_fail_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lct_rejects[1].ls;
+ bp->stats.port_lem_reject_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[0].ls;
+ bp->stats.port_lem_reject_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.lem_rejects[1].ls;
+ bp->stats.port_lem_cts[0] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[0].ls;
+ bp->stats.port_lem_cts[1] = bp->cmd_rsp_virt->cntrs_get.cntrs.link_errors[1].ls;
+
+#endif
+ return ((struct enet_statistics *) &bp->os.MacStat);
+} // ctl_get_stat
+
+
+/*
+ * ==============================
+ * = skfp_ctl_set_multicast_list =
+ * ==============================
+ *
+ * Overview:
+ * Enable/Disable LLC frame promiscuous mode reception
+ * on the adapter and/or update multicast address table.
+ *
+ * Returns:
+ * None
+ *
+ * Arguments:
+ * dev - pointer to device information
+ *
+ * Functional Description:
+ * This function aquires the driver lock and only calls
+ * skfp_ctl_set_multicast_list_wo_lock then.
+ * This routine follows a fairly simple algorithm for setting the
+ * adapter filters and CAM:
+ *
+ * if IFF_PROMISC flag is set
+ * enable promiscuous mode
+ * else
+ * disable promiscuous mode
+ * if number of multicast addresses <= max. multicast number
+ * add mc addresses to adapter table
+ * else
+ * enable promiscuous mode
+ * update adapter filters
+ *
+ * Assumptions:
+ * Multicast addresses are presented in canonical (LSB) format.
+ *
+ * Side Effects:
+ * On-board adapter filters are updated.
+ */
+static void skfp_ctl_set_multicast_list(struct device *dev)
+{
+#ifdef __SMP__
+ skfddi_priv *bp = PRIV(dev);
+#endif
+ unsigned long Flags;
+
+ spin_lock_irqsave(&bp->DriverLock, Flags);
+ skfp_ctl_set_multicast_list_wo_lock(dev);
+ spin_unlock_irqrestore(&bp->DriverLock, Flags);
+ return;
+} // skfp_ctl_set_multicast_list
+
+
+
+static void skfp_ctl_set_multicast_list_wo_lock(struct device *dev)
+{
+ struct s_smc *smc = (struct s_smc *) dev->priv;
+ struct dev_mc_list *dmi; /* ptr to multicast addr entry */
+ int i;
+
+ /* Enable promiscuous mode, if necessary */
+ if (dev->flags & IFF_PROMISC) {
+ mac_drv_rx_mode(smc, RX_ENABLE_PROMISC);
+ PRINTK(KERN_INFO "PROMISCUOUS MODE ENABLED\n");
+ }
+ /* Else, update multicast address table */
+ else {
+ mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);
+ PRINTK(KERN_INFO "PROMISCUOUS MODE DISABLED\n");
+
+ // Reset all MC addresses
+ mac_clear_multicast(smc);
+ mac_drv_rx_mode(smc, RX_DISABLE_ALLMULTI);
+
+ if (dev->flags & IFF_ALLMULTI) {
+ mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI);
+ PRINTK(KERN_INFO "ENABLE ALL MC ADDRESSES\n");
+ } else if (dev->mc_count > 0) {
+ if (dev->mc_count <= FPMAX_MULTICAST) {
+ /* use exact filtering */
+
+ // point to first multicast addr
+ dmi = dev->mc_list;
+
+ for (i = 0; i < dev->mc_count; i++) {
+ mac_add_multicast(smc,
+ dmi->dmi_addr, 1);
+ PRINTK(KERN_INFO "ENABLE MC ADDRESS:");
+ PRINTK(" %02x %02x %02x ",
+ dmi->dmi_addr[0],
+ dmi->dmi_addr[1],
+ dmi->dmi_addr[2]);
+ PRINTK("%02x %02x %02x\n",
+ dmi->dmi_addr[3],
+ dmi->dmi_addr[4],
+ dmi->dmi_addr[5]);
+ dmi = dmi->next;
+ } // for
+
+ } else { // more MC addresses than HW supports
+
+ mac_drv_rx_mode(smc, RX_ENABLE_ALLMULTI);
+ PRINTK(KERN_INFO "ENABLE ALL MC ADDRESSES\n");
+ }
+ } else { // no MC addresses
+
+ PRINTK(KERN_INFO "DISABLE ALL MC ADDRESSES\n");
+ }
+
+ /* Update adapter filters */
+ mac_update_multicast(smc);
+ }
+ return;
+} // skfp_ctl_set_multicast_list_wo_lock
+
+
+/*
+ * ===========================
+ * = skfp_ctl_set_mac_address =
+ * ===========================
+ *
+ * Overview:
+ * set new mac address on adapter and update dev_addr field in device table.
+ *
+ * Returns:
+ * None
+ *
+ * Arguments:
+ * dev - pointer to device information
+ * addr - pointer to sockaddr structure containing unicast address to set
+ *
+ * Assumptions:
+ * The address pointed to by addr->sa_data is a valid unicast
+ * address and is presented in canonical (LSB) format.
+ */
+static int skfp_ctl_set_mac_address(struct device *dev, void *addr)
+{
+ struct s_smc *smc = (struct s_smc *) dev->priv;
+ struct sockaddr *p_sockaddr = (struct sockaddr *) addr;
+#ifdef __SMP__
+ skfddi_priv *bp = (skfddi_priv *) & smc->os;
+#endif
+ unsigned long Flags;
+
+
+ memcpy(dev->dev_addr, p_sockaddr->sa_data, FDDI_K_ALEN);
+ spin_lock_irqsave(&bp->DriverLock, Flags);
+ ResetAdapter(smc);
+ spin_unlock_irqrestore(&bp->DriverLock, Flags);
+
+ return (0); /* always return zero */
+} // skfp_ctl_set_mac_address
+
+
+/*
+ * ==============
+ * = skfp_ioctl =
+ * ==============
+ *
+ * Overview:
+ *
+ * Perform IOCTL call functions here. Some are privileged operations and the
+ * effective uid is checked in those cases.
+ *
+ * Returns:
+ * status value
+ * 0 - success
+ * other - failure
+ *
+ * Arguments:
+ * dev - pointer to device information
+ * rq - pointer to ioctl request structure
+ * cmd - ?
+ *
+ */
+
+
+static int skfp_ioctl(struct device *dev, struct ifreq *rq, int cmd)
+{
+ skfddi_priv *lp = PRIV(dev);
+ struct s_skfp_ioctl ioc;
+ int status = 0;
+
+ copy_from_user(&ioc, rq->ifr_data, sizeof(struct s_skfp_ioctl));
+ switch (ioc.cmd) {
+ case SKFP_GET_STATS: /* Get the driver statistics */
+ ioc.len = sizeof(lp->MacStat);
+ copy_to_user(ioc.data, skfp_ctl_get_stats(dev), ioc.len);
+ break;
+ case SKFP_CLR_STATS: /* Zero out the driver statistics */
+ if (suser()) {
+ memset(&lp->MacStat, 0, sizeof(lp->MacStat));
+ } else {
+ status = -EPERM;
+ }
+ break;
+ default:
+ printk("ioctl for %s: unknow cmd: %04x\n", dev->name, ioc.cmd);
+ } // switch
+
+ return status;
+} // skfp_ioctl
+
+
+/*
+ * =====================
+ * = skfp_send_pkt =
+ * =====================
+ *
+ * Overview:
+ * Queues a packet for transmission and try to transmit it.
+ *
+ * Returns:
+ * Condition code
+ *
+ * Arguments:
+ * skb - pointer to sk_buff to queue for transmission
+ * dev - pointer to device information
+ *
+ * Functional Description:
+ * Here we assume that an incoming skb transmit request
+ * is contained in a single physically contiguous buffer
+ * in which the virtual address of the start of packet
+ * (skb->data) can be converted to a physical address
+ * by using virt_to_bus().
+ *
+ * We have an internal queue for packets we can not send
+ * immediately. Packets in this queue can be given to the
+ * adapter if transmit buffers are freed.
+ *
+ * We can't free the skb until after it's been DMA'd
+ * out by the adapter, so we'll keep it in the driver and
+ * return it in mac_drv_tx_complete.
+ *
+ * Return Codes:
+ * 0 - driver has queued and/or sent packet
+ * 1 - caller should requeue the sk_buff for later transmission
+ *
+ * Assumptions:
+ * The entire packet is stored in one physically
+ * contiguous buffer which is not cached and whose
+ * 32-bit physical address can be determined.
+ *
+ * It's vital that this routine is NOT reentered for the
+ * same board and that the OS is not in another section of
+ * code (eg. skfp_interrupt) for the same board on a
+ * different thread.
+ *
+ * Side Effects:
+ * None
+ */
+static int skfp_send_pkt(struct sk_buff *skb, struct device *dev)
+{
+ skfddi_priv *bp = PRIV(dev);
+ unsigned long Flags;
+
+ PRINTK(KERN_INFO "skfp_send_pkt\n");
+ if (dev->interrupt)
+ return 1;
+
+ if (skb == NULL) {
+ mark_bh(NET_BH);
+ return 0;
+ }
+ if (dev->tbusy) {
+ // printk(KERN_INFO "%s transmit timeout\n", dev->name);
+ spin_lock_irqsave(&bp->DriverLock, Flags);
+ ResetAdapter((struct s_smc *) dev->priv);
+ spin_unlock_irqrestore(&bp->DriverLock, Flags);
+ return 1;
+ }
+ /*
+ * Verify that incoming transmit request is OK
+ *
+ * Note: The packet size check is consistent with other
+ * Linux device drivers, although the correct packet
+ * size should be verified before calling the
+ * transmit routine.
+ */
+
+ if (!(skb->len >= FDDI_K_LLC_ZLEN && skb->len <= FDDI_K_LLC_LEN)) {
+ bp->MacStat.tx_errors++; /* bump error counter */
+ // dequeue packets from xmt queue and send them
+ mark_bh(NET_BH);
+ dev_kfree_skb(skb);
+ return (0); /* return "success" */
+ }
+ if (test_and_set_bit(0, (void *) &dev->tbusy) != 0) {
+ printk(KERN_INFO "%s: ERROR: Transmitter access conflict.\n",
+ dev->name);
+ return 1;
+ }
+ if (bp->QueueSkb == 0) { // return with tbusy set: queue full
+
+ // printk(KERN_INFO "%s: queue full\n", dev->name);
+ return 1;
+ }
+ bp->QueueSkb--;
+ skb_queue_tail(&bp->SendSkbQueue, skb);
+ send_queued_packets((struct s_smc *) dev->priv);
+ if (bp->QueueSkb > 0) {
+ dev->tbusy = 0;
+ }
+ dev->trans_start = jiffies;
+ return 0;
+
+} // skfp_send_pkt
+
+
+/*
+ * =======================
+ * = send_queued_packets =
+ * =======================
+ *
+ * Overview:
+ * Send packets from the driver queue as long as there are some and
+ * transmit resources are available.
+ *
+ * Returns:
+ * None
+ *
+ * Arguments:
+ * smc - pointer to smc (adapter) structure
+ *
+ * Functional Description:
+ * Take a packet from queue if there is any. If not, then we are done.
+ * Check if there are resources to send the packet. If not, requeue it
+ * and exit.
+ * Set packet descriptor flags and give packet to adapter.
+ * Check if any send resources can be freed (we do not use the
+ * transmit complete interrupt).
+ */
+static void send_queued_packets(struct s_smc *smc)
+{
+ skfddi_priv *bp = (skfddi_priv *) & smc->os;
+ struct sk_buff *skb;
+ unsigned char fc;
+ int queue;
+ struct s_smt_fp_txd *txd; // Current TxD.
+ static int log_counter=0; // to avoid to much logging
+ unsigned long Flags;
+
+ int frame_status; // HWM tx frame status.
+
+ PRINTK(KERN_INFO "send queued packets\n");
+ for (;;) {
+ // send first buffer from queue
+ skb = skb_dequeue(&bp->SendSkbQueue);
+
+ if (!skb) {
+ PRINTK(KERN_INFO "queue empty\n");
+ return;
+ } // queue empty !
+
+ spin_lock_irqsave(&bp->DriverLock, Flags);
+ fc = skb->data[0];
+ queue = (fc & FC_SYNC_BIT) ? QUEUE_S : QUEUE_A0;
+#ifdef ESS
+ // Check if the frame may/must be sent as a synchronous frame.
+
+ if ((fc & ~(FC_SYNC_BIT | FC_LLC_PRIOR)) == FC_ASYNC_LLC) {
+ // It's an LLC frame.
+ if (!smc->ess.sync_bw_available)
+ fc &= ~FC_SYNC_BIT; // No bandwidth available.
+
+ else { // Bandwidth is available.
+
+ if (smc->mib.fddiESSSynchTxMode) {
+ // Send as sync. frame.
+ fc |= FC_SYNC_BIT;
+ }
+ }
+ }
+#endif // ESS
+ frame_status = hwm_tx_init(smc, fc, 1, skb->len, queue);
+
+ if ((frame_status & (LOC_TX | LAN_TX)) == 0) {
+ // Unable to send the frame.
+
+ if ((frame_status & RING_DOWN) != 0) {
+ // Ring is down.
+ PRINTK("Tx attempt while ring down.\n");
+ } else if ((frame_status & OUT_OF_TXD) != 0) {
+ if(log_counter == 0) {
+ // printk(KERN_INFO "%s: out of TXDs.\n",
+ // bp->dev->name);
+ }
+ log_counter++;
+ if (log_counter >= 100000)
+ log_counter = 0;
+ } else {
+ if(log_counter == 0) {
+ // printk(KERN_INFO "%s: out of transmit"
+ // "resources\n",
+ // bp->dev->name);
+ }
+ log_counter++;
+ if (log_counter >= 100000)
+ log_counter = 0;
+ }
+
+ // Note: We will retry the operation as soon as
+ // transmit resources become available.
+ skb_queue_head(&bp->SendSkbQueue, skb);
+ spin_unlock_irqrestore(&bp->DriverLock, Flags);
+ return; // Packet has been queued.
+
+ } // if (unable to send frame)
+
+ bp->QueueSkb++; // one packet less in local queue
+
+ // source address in packet ?
+ CheckSourceAddress(skb->data, smc->hw.fddi_canon_addr.a);
+
+ txd = (struct s_smt_fp_txd *) HWM_GET_CURR_TXD(smc, queue);
+
+ if (frame_status & LAN_TX) {
+ txd->txd_os.skb = skb; // save skb
+
+ }
+ hwm_tx_frag(smc, skb->data, virt_to_bus(skb->data), skb->len,
+ frame_status | FIRST_FRAG | LAST_FRAG | EN_IRQ_EOF);
+
+ if (!(frame_status & LAN_TX)) { // local only frame
+ dev_kfree_skb(skb);
+ }
+ spin_unlock_irqrestore(&bp->DriverLock, Flags);
+ } // for
+
+ return; // never reached
+
+} // send_queued_packets
+
+
+/************************
+ *
+ * CheckSourceAddress
+ *
+ * Verify if the source address is set. Insert it if necessary.
+ *
+ ************************/
+void CheckSourceAddress(unsigned char *frame, unsigned char *hw_addr)
+{
+ unsigned char SRBit;
+
+ if ((((unsigned long) frame[1 + 6]) & ~0x01) != 0) // source routing bit
+
+ return;
+ if ((unsigned short) frame[1 + 10] != 0)
+ return;
+ SRBit = frame[1 + 6] & 0x01;
+ memcpy(&frame[1 + 6], hw_addr, 6);
+ frame[8] |= SRBit;
+} // CheckSourceAddress
+
+
+/************************
+ *
+ * ResetAdapter
+ *
+ * Reset the adapter and bring it back to operational mode.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ * Out
+ * Nothing.
+ *
+ ************************/
+static void ResetAdapter(struct s_smc *smc)
+{
+
+ PRINTK(KERN_INFO "[fddi: ResetAdapter]\n");
+
+ // Stop the adapter.
+
+ card_stop(smc); // Stop all activity.
+
+ // Clear the transmit and receive descriptor queues.
+ mac_drv_clear_tx_queue(smc);
+ mac_drv_clear_rx_queue(smc);
+
+ // Restart the adapter.
+
+ smt_reset_defaults(smc, 1); // Initialize the SMT module.
+
+ init_smt(smc, (smc->os.dev)->dev_addr); // Initialize the hardware.
+
+ smt_online(smc, 1); // Insert into the ring again.
+ STI_FBI();
+
+ // Restore original receive mode (multicasts, promiscuous, etc.).
+ skfp_ctl_set_multicast_list_wo_lock(smc->os.dev);
+} // ResetAdapter
+
+
+//--------------- functions called by hardware module ----------------
+
+/************************
+ *
+ * llc_restart_tx
+ *
+ * The hardware driver calls this routine when the transmit complete
+ * interrupt bits (end of frame) for the synchronous or asynchronous
+ * queue is set.
+ *
+ * NOTE The hardware driver calls this function also if no packets are queued.
+ * The routine must be able to handle this case.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void llc_restart_tx(struct s_smc *smc)
+{
+ skfddi_priv *bp = (skfddi_priv *) & smc->os;
+
+ PRINTK(KERN_INFO "[llc_restart_tx]\n");
+
+ // Try to send queued packets
+ spin_unlock(&bp->DriverLock);
+ send_queued_packets(smc);
+ spin_lock(&bp->DriverLock);
+ bp->dev->tbusy = 0; // system may send again if it was blocked
+
+} // llc_restart_tx
+
+
+/************************
+ *
+ * mac_drv_get_space
+ *
+ * The hardware module calls this function to allocate the memory
+ * for the SMT MBufs if the define MB_OUTSIDE_SMC is specified.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * size - Size of memory in bytes to allocate.
+ * Out
+ * != 0 A pointer to the virtual address of the allocated memory.
+ * == 0 Allocation error.
+ *
+ ************************/
+void *mac_drv_get_space(struct s_smc *smc, unsigned int size)
+{
+ void *virt;
+
+ PRINTK(KERN_INFO "mac_drv_get_space\n");
+ virt = (void *) (smc->os.SharedMemAddr + smc->os.SharedMemHeap);
+
+ if ((smc->os.SharedMemHeap + size) > smc->os.SharedMemSize) {
+ printk("Unexpected SMT memory size requested: %d\n", size);
+ return (NULL);
+ }
+ smc->os.SharedMemHeap += size; // Move heap pointer.
+
+ PRINTK(KERN_INFO "mac_drv_get_space end\n");
+ PRINTK(KERN_INFO "virt addr: %lx\n", (ulong) virt);
+ PRINTK(KERN_INFO "bus addr: %lx\n", (ulong) virt_to_bus(virt));
+ return (virt);
+} // mac_drv_get_space
+
+
+/************************
+ *
+ * mac_drv_get_desc_mem
+ *
+ * This function is called by the hardware dependent module.
+ * It allocates the memory for the RxD and TxD descriptors.
+ *
+ * This memory must be non-cached, non-movable and non-swapable.
+ * This memory should start at a physical page boundary.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * size - Size of memory in bytes to allocate.
+ * Out
+ * != 0 A pointer to the virtual address of the allocated memory.
+ * == 0 Allocation error.
+ *
+ ************************/
+void *mac_drv_get_desc_mem(struct s_smc *smc, unsigned int size)
+{
+
+ char *virt;
+
+ PRINTK(KERN_INFO "mac_drv_get_desc_mem\n");
+
+ // Descriptor memory must be aligned on 16-byte boundary.
+
+ virt = mac_drv_get_space(smc, size);
+
+ size = (u_int) ((0 - (unsigned long) virt) & 15);
+
+ PRINTK("Allocate %u bytes alignment gap ", size);
+ PRINTK("for descriptor memory.\n");
+
+ if (!mac_drv_get_space(smc, size)) {
+ printk("fddi: Unable to align descriptor memory.\n");
+ return (NULL);
+ }
+ return (virt + size);
+} // mac_drv_get_desc_mem
+
+
+/************************
+ *
+ * mac_drv_virt2phys
+ *
+ * Get the physical address of a given virtual address.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * virt - A (virtual) pointer into our 'shared' memory area.
+ * Out
+ * Physical address of the given virtual address.
+ *
+ ************************/
+unsigned long mac_drv_virt2phys(struct s_smc *smc, void *virt)
+{
+ return virt_to_bus(virt);
+} // mac_drv_virt2phys
+
+
+/************************
+ *
+ * dma_master
+ *
+ * The HWM calls this function, when the driver leads through a DMA
+ * transfer. If the OS-specific module must prepare the system hardware
+ * for the DMA transfer, it should do it in this function.
+ *
+ * The hardware module calls this dma_master if it wants to send an SMT
+ * frame. This means that the virt address passed in here is part of
+ * the 'shared' memory area.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * virt - The virtual address of the data.
+ *
+ * len - The length in bytes of the data.
+ *
+ * flag - Indicates the transmit direction and the buffer type:
+ * DMA_RD (0x01) system RAM ==> adapter buffer memory
+ * DMA_WR (0x02) adapter buffer memory ==> system RAM
+ * SMT_BUF (0x80) SMT buffer
+ *
+ * >> NOTE: SMT_BUF and DMA_RD are always set for PCI. <<
+ * Out
+ * Returns the pyhsical address for the DMA transfer.
+ *
+ ************************/
+u_long dma_master(struct s_smc * smc, void *virt, int len, int flag)
+{
+ return (virt_to_bus(virt));
+} // dma_master
+
+
+/************************
+ *
+ * dma_complete
+ *
+ * The hardware module calls this routine when it has completed a DMA
+ * transfer. If the operating system dependant module has set up the DMA
+ * channel via dma_master() (e.g. Windows NT or AIX) it should clean up
+ * the DMA channel.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * descr - A pointer to a TxD or RxD, respectively.
+ *
+ * flag - Indicates the DMA transfer direction / SMT buffer:
+ * DMA_RD (0x01) system RAM ==> adapter buffer memory
+ * DMA_WR (0x02) adapter buffer memory ==> system RAM
+ * SMT_BUF (0x80) SMT buffer (managed by HWM)
+ * Out
+ * Nothing.
+ *
+ ************************/
+void dma_complete(struct s_smc *smc, volatile union s_fp_descr *descr, int flag)
+{
+ return;
+} // dma_complete
+
+
+/************************
+ *
+ * mac_drv_tx_complete
+ *
+ * Transmit of a packet is complete. Release the tx staging buffer.
+ *
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * txd - A pointer to the last TxD which is used by the frame.
+ * Out
+ * Returns nothing.
+ *
+ ************************/
+void mac_drv_tx_complete(struct s_smc *smc, volatile struct s_smt_fp_txd *txd)
+{
+ struct sk_buff *skb;
+
+ PRINTK(KERN_INFO "entering mac_drv_tx_complete\n");
+ // Check if this TxD points to a skb
+
+ if (!(skb = txd->txd_os.skb)) {
+ PRINTK("TXD with no skb assigned.\n");
+ return;
+ }
+ txd->txd_os.skb = NULL;
+
+ smc->os.MacStat.tx_packets++; // Count transmitted packets.
+ smc->os.MacStat.tx_bytes+=skb->len; // Count bytes
+
+ // free the skb
+ dev_kfree_skb(skb);
+
+ PRINTK(KERN_INFO "leaving mac_drv_tx_complete\n");
+} // mac_drv_tx_complete
+
+
+/************************
+ *
+ * dump packets to logfile
+ *
+ ************************/
+#ifdef DUMPPACKETS
+void dump_data(unsigned char *Data, int length)
+{
+ int i, j;
+ unsigned char s[255], sh[10];
+ if (length > 64) {
+ length = 64;
+ }
+ printk(KERN_INFO "---Packet start---\n");
+ for (i = 0, j = 0; i < length / 8; i++, j += 8)
+ printk(KERN_INFO "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+ Data[j + 0], Data[j + 1], Data[j + 2], Data[j + 3],
+ Data[j + 4], Data[j + 5], Data[j + 6], Data[j + 7]);
+ strcpy(s, "");
+ for (i = 0; i < length % 8; i++) {
+ sprintf(sh, "%02x ", Data[j + i]);
+ strcat(s, sh);
+ }
+ printk(KERN_INFO "%s\n", s);
+ printk(KERN_INFO "------------------\n");
+} // dump_data
+#else
+#define dump_data(data,len)
+#endif // DUMPPACKETS
+
+/************************
+ *
+ * mac_drv_rx_complete
+ *
+ * The hardware module calls this function if an LLC frame is received
+ * in a receive buffer. Also the SMT, NSA, and directed beacon frames
+ * from the network will be passed to the LLC layer by this function
+ * if passing is enabled.
+ *
+ * mac_drv_rx_complete forwards the frame to the LLC layer if it should
+ * be received. It also fills the RxD ring with new receive buffers if
+ * some can be queued.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * rxd - A pointer to the first RxD which is used by the receive frame.
+ *
+ * frag_count - Count of RxDs used by the received frame.
+ *
+ * len - Frame length.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void mac_drv_rx_complete(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
+ int frag_count, int len)
+{
+ skfddi_priv *bp = (skfddi_priv *) & smc->os;
+ struct sk_buff *skb;
+ unsigned char *virt, *cp;
+ unsigned short ri;
+ u_int RifLength;
+
+ PRINTK(KERN_INFO "entering mac_drv_rx_complete (len=%d)\n", len);
+ if (frag_count != 1) { // This is not allowed to happen.
+
+ printk("fddi: ERROR: Multi-fragment receive!\n");
+ goto RequeueRxd; // Re-use the given RXD(s).
+
+ }
+ skb = rxd->rxd_os.skb;
+ if (!skb) {
+ PRINTK(KERN_INFO "No skb in rxd\n");
+ smc->os.MacStat.rx_errors++;
+ goto RequeueRxd;
+ }
+ virt = skb->data;
+
+ dump_data(skb->data, len);
+
+ /*
+ * FDDI Frame format:
+ * +-------+-------+-------+------------+--------+------------+
+ * | FC[1] | DA[6] | SA[6] | RIF[0..18] | LLC[3] | Data[0..n] |
+ * +-------+-------+-------+------------+--------+------------+
+ *
+ * FC = Frame Control
+ * DA = Destination Address
+ * SA = Source Address
+ * RIF = Routing Information Field
+ * LLC = Logical Link Control
+ */
+
+ // Remove Routing Information Field (RIF), if present.
+
+ if ((virt[1 + 6] & FDDI_RII) == 0)
+ RifLength = 0;
+ else {
+ int n;
+// goos: RIF removal has still to be tested
+ PRINTK(KERN_INFO "RIF found\n");
+ // Get RIF length from Routing Control (RC) field.
+ cp = virt + FDDI_MAC_HDR_LEN; // Point behind MAC header.
+
+ ri = ntohs(*((unsigned short *) cp));
+ RifLength = ri & FDDI_RCF_LEN_MASK;
+ if (len < (int) (FDDI_MAC_HDR_LEN + RifLength)) {
+ printk("fddi: Invalid RIF.\n");
+ goto RequeueRxd; // Discard the frame.
+
+ }
+ virt[1 + 6] &= ~FDDI_RII; // Clear RII bit.
+ // regions overlap
+
+ virt = cp + RifLength;
+ for (n = FDDI_MAC_HDR_LEN; n; n--)
+ *--virt = *--cp;
+ // adjust sbd->data pointer
+ skb_pull(skb, RifLength);
+ len -= RifLength;
+ RifLength = 0;
+ }
+
+ // Count statistics.
+ smc->os.MacStat.rx_packets++; // Count indicated receive packets.
+ smc->os.MacStat.rx_bytes+=len; // Count bytes
+
+ // virt points to header again
+ if (virt[1] & 0x01) { // Check group (multicast) bit.
+
+ smc->os.MacStat.multicast++;
+ }
+
+ // deliver frame to system
+ rxd->rxd_os.skb = NULL;
+ skb_trim(skb, len);
+ skb->protocol = fddi_type_trans(skb, bp->dev);
+ skb->dev = bp->dev; /* pass up device pointer */
+
+ netif_rx(skb);
+
+ HWM_RX_CHECK(smc, RX_LOW_WATERMARK);
+ return;
+
+ RequeueRxd:
+ PRINTK(KERN_INFO "Rx: re-queue RXD.\n");
+ mac_drv_requeue_rxd(smc, rxd, frag_count);
+ smc->os.MacStat.rx_errors++; // Count receive packets not indicated.
+
+} // mac_drv_rx_complete
+
+
+/************************
+ *
+ * mac_drv_requeue_rxd
+ *
+ * The hardware module calls this function to request the OS-specific
+ * module to queue the receive buffer(s) represented by the pointer
+ * to the RxD and the frag_count into the receive queue again. This
+ * buffer was filled with an invalid frame or an SMT frame.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * rxd - A pointer to the first RxD which is used by the receive frame.
+ *
+ * frag_count - Count of RxDs used by the received frame.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void mac_drv_requeue_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
+ int frag_count)
+{
+ volatile struct s_smt_fp_rxd *next_rxd;
+ volatile struct s_smt_fp_rxd *src_rxd;
+ struct sk_buff *skb;
+ int MaxFrameSize;
+ unsigned char *v_addr;
+ unsigned long b_addr;
+
+ if (frag_count != 1) // This is not allowed to happen.
+
+ printk("fddi: Multi-fragment requeue!\n");
+
+ MaxFrameSize = ((skfddi_priv *) & smc->os)->MaxFrameSize;
+ src_rxd = rxd;
+ for (; frag_count > 0; frag_count--) {
+ next_rxd = src_rxd->rxd_next;
+ rxd = HWM_GET_CURR_RXD(smc);
+
+ skb = src_rxd->rxd_os.skb;
+ if (skb == NULL) { // this should not happen
+
+ PRINTK("Requeue with no skb in rxd!\n");
+ skb = alloc_skb(MaxFrameSize + 3, GFP_ATOMIC);
+ if (skb) {
+ // we got a skb
+ rxd->rxd_os.skb = skb;
+ skb_reserve(skb, 3);
+ skb_put(skb, MaxFrameSize);
+ v_addr = skb->data;
+ b_addr = virt_to_bus(v_addr);
+ } else {
+ // no skb available, use local buffer
+ PRINTK("Queueing invalid buffer!\n");
+ rxd->rxd_os.skb = NULL;
+ v_addr = smc->os.LocalRxBuffer;
+ b_addr = virt_to_bus(v_addr);
+ }
+ } else {
+ // we use skb from old rxd
+ rxd->rxd_os.skb = skb;
+ v_addr = skb->data;
+ b_addr = virt_to_bus(v_addr);
+ }
+ hwm_rx_frag(smc, v_addr, b_addr, MaxFrameSize,
+ FIRST_FRAG | LAST_FRAG);
+
+ src_rxd = next_rxd;
+ }
+} // mac_drv_requeue_rxd
+
+
+/************************
+ *
+ * mac_drv_fill_rxd
+ *
+ * The hardware module calls this function at initialization time
+ * to fill the RxD ring with receive buffers. It is also called by
+ * mac_drv_rx_complete if rx_free is large enough to queue some new
+ * receive buffers into the RxD ring. mac_drv_fill_rxd queues new
+ * receive buffers as long as enough RxDs and receive buffers are
+ * available.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void mac_drv_fill_rxd(struct s_smc *smc)
+{
+ int MaxFrameSize;
+ unsigned char *v_addr;
+ unsigned long b_addr;
+ struct sk_buff *skb;
+ volatile struct s_smt_fp_rxd *rxd;
+
+ PRINTK(KERN_INFO "entering mac_drv_fill_rxd\n");
+
+ // Walk through the list of free receive buffers, passing receive
+ // buffers to the HWM as long as RXDs are available.
+
+ MaxFrameSize = ((skfddi_priv *) & smc->os)->MaxFrameSize;
+ // Check if there is any RXD left.
+ while (HWM_GET_RX_FREE(smc) > 0) {
+ PRINTK(KERN_INFO ".\n");
+
+ rxd = HWM_GET_CURR_RXD(smc);
+ skb = alloc_skb(MaxFrameSize + 3, GFP_ATOMIC);
+ if (skb) {
+ // we got a skb
+ skb_reserve(skb, 3);
+ skb_put(skb, MaxFrameSize);
+ v_addr = skb->data;
+ b_addr = virt_to_bus(v_addr);
+ } else {
+ // no skb available, use local buffer
+ // System has run out of buffer memory, but we want to
+ // keep the receiver running in hope of better times.
+ // Multiple descriptors may point to this local buffer,
+ // so data in it must be considered invalid.
+ PRINTK("Queueing invalid buffer!\n");
+ v_addr = smc->os.LocalRxBuffer;
+ b_addr = virt_to_bus(v_addr);
+ }
+
+ rxd->rxd_os.skb = skb;
+
+ // Pass receive buffer to HWM.
+ hwm_rx_frag(smc, v_addr, b_addr, MaxFrameSize,
+ FIRST_FRAG | LAST_FRAG);
+ }
+ PRINTK(KERN_INFO "leaving mac_drv_fill_rxd\n");
+} // mac_drv_fill_rxd
+
+
+/************************
+ *
+ * mac_drv_clear_rxd
+ *
+ * The hardware module calls this function to release unused
+ * receive buffers.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * rxd - A pointer to the first RxD which is used by the receive buffer.
+ *
+ * frag_count - Count of RxDs used by the receive buffer.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void mac_drv_clear_rxd(struct s_smc *smc, volatile struct s_smt_fp_rxd *rxd,
+ int frag_count)
+{
+
+ struct sk_buff *skb;
+
+ PRINTK("entering mac_drv_clear_rxd\n");
+
+ if (frag_count != 1) // This is not allowed to happen.
+
+ printk("fddi: Multi-fragment clear!\n");
+
+ for (; frag_count > 0; frag_count--) {
+ skb = rxd->rxd_os.skb;
+ if (skb != NULL) {
+ dev_kfree_skb(skb);
+ rxd->rxd_os.skb = NULL;
+ }
+ rxd = rxd->rxd_next; // Next RXD.
+
+ }
+} // mac_drv_clear_rxd
+
+
+/************************
+ *
+ * mac_drv_rx_init
+ *
+ * The hardware module calls this routine when an SMT or NSA frame of the
+ * local SMT should be delivered to the LLC layer.
+ *
+ * It is necessary to have this function, because there is no other way to
+ * copy the contents of SMT MBufs into receive buffers.
+ *
+ * mac_drv_rx_init allocates the required target memory for this frame,
+ * and receives the frame fragment by fragment by calling mac_drv_rx_frag.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * len - The length (in bytes) of the received frame (FC, DA, SA, Data).
+ *
+ * fc - The Frame Control field of the received frame.
+ *
+ * look_ahead - A pointer to the lookahead data buffer (may be NULL).
+ *
+ * la_len - The length of the lookahead data stored in the lookahead
+ * buffer (may be zero).
+ * Out
+ * Always returns zero (0).
+ *
+ ************************/
+int mac_drv_rx_init(struct s_smc *smc, int len, int fc,
+ char *look_ahead, int la_len)
+{
+ struct sk_buff *skb;
+
+ PRINTK("entering mac_drv_rx_init(len=%d)\n", len);
+
+ // "Received" a SMT or NSA frame of the local SMT.
+
+ if (len != la_len || len < FDDI_MAC_HDR_LEN || !look_ahead) {
+ PRINTK("fddi: Discard invalid local SMT frame\n");
+ PRINTK(" len=%d, la_len=%d, (ULONG) look_ahead=%08lXh.\n",
+ len, la_len, (unsigned long) look_ahead);
+ return (0);
+ }
+ skb = alloc_skb(len + 3, GFP_ATOMIC);
+ if (!skb) {
+ PRINTK("fddi: Local SMT: skb memory exhausted.\n");
+ return (0);
+ }
+ skb_reserve(skb, 3);
+ skb_put(skb, len);
+ memcpy(skb->data, look_ahead, len);
+
+ // deliver frame to system
+ skb->protocol = fddi_type_trans(skb, ((skfddi_priv *) & smc->os)->dev);
+ netif_rx(skb);
+
+ return (0);
+} // mac_drv_rx_init
+
+
+/************************
+ *
+ * smt_timer_poll
+ *
+ * This routine is called periodically by the SMT module to clean up the
+ * driver.
+ *
+ * Return any queued frames back to the upper protocol layers if the ring
+ * is down.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void smt_timer_poll(struct s_smc *smc)
+{
+} // smt_timer_poll
+
+
+/************************
+ *
+ * ring_status_indication
+ *
+ * This function indicates a change of the ring state.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * status - The current ring status.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void ring_status_indication(struct s_smc *smc, u_long status)
+{
+ PRINTK("ring_status_indication( ");
+ if (status & RS_RES15)
+ PRINTK("RS_RES15 ");
+ if (status & RS_HARDERROR)
+ PRINTK("RS_HARDERROR ");
+ if (status & RS_SOFTERROR)
+ PRINTK("RS_SOFTERROR ");
+ if (status & RS_BEACON)
+ PRINTK("RS_BEACON ");
+ if (status & RS_PATHTEST)
+ PRINTK("RS_PATHTEST ");
+ if (status & RS_SELFTEST)
+ PRINTK("RS_SELFTEST ");
+ if (status & RS_RES9)
+ PRINTK("RS_RES9 ");
+ if (status & RS_DISCONNECT)
+ PRINTK("RS_DISCONNECT ");
+ if (status & RS_RES7)
+ PRINTK("RS_RES7 ");
+ if (status & RS_DUPADDR)
+ PRINTK("RS_DUPADDR ");
+ if (status & RS_NORINGOP)
+ PRINTK("RS_NORINGOP ");
+ if (status & RS_VERSION)
+ PRINTK("RS_VERSION ");
+ if (status & RS_STUCKBYPASSS)
+ PRINTK("RS_STUCKBYPASSS ");
+ if (status & RS_EVENT)
+ PRINTK("RS_EVENT ");
+ if (status & RS_RINGOPCHANGE)
+ PRINTK("RS_RINGOPCHANGE ");
+ if (status & RS_RES0)
+ PRINTK("RS_RES0 ");
+ PRINTK("]\n");
+} // ring_status_indication
+
+
+/************************
+ *
+ * smt_get_time
+ *
+ * Gets the current time from the system.
+ * Args
+ * None.
+ * Out
+ * The current time in TICKS_PER_SECOND.
+ *
+ * TICKS_PER_SECOND has the unit 'count of timer ticks per second'. It is
+ * defined in "targetos.h". The definition of TICKS_PER_SECOND must comply
+ * to the time returned by smt_get_time().
+ *
+ ************************/
+unsigned long smt_get_time(void)
+{
+ return jiffies;
+} // smt_get_time
+
+
+/************************
+ *
+ * smt_stat_counter
+ *
+ * Status counter update (ring_op, fifo full).
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * stat - = 0: A ring operational change occurred.
+ * = 1: The FORMAC FIFO buffer is full / FIFO overflow.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void smt_stat_counter(struct s_smc *smc, int stat)
+{
+// BOOLEAN RingIsUp ;
+
+ PRINTK(KERN_INFO "smt_stat_counter\n");
+ switch (stat) {
+ case 0:
+ PRINTK(KERN_INFO "Ring operational change.\n");
+ break;
+ case 1:
+ PRINTK(KERN_INFO "Receive fifo overflow.\n");
+ smc->os.MacStat.rx_errors++;
+ break;
+ default:
+ PRINTK(KERN_INFO "Unknown status (%d).\n", stat);
+ break;
+ }
+} // smt_stat_counter
+
+
+/************************
+ *
+ * cfm_state_change
+ *
+ * Sets CFM state in custom statistics.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * c_state - Possible values are:
+ *
+ * EC0_OUT, EC1_IN, EC2_TRACE, EC3_LEAVE, EC4_PATH_TEST,
+ * EC5_INSERT, EC6_CHECK, EC7_DEINSERT
+ * Out
+ * Nothing.
+ *
+ ************************/
+void cfm_state_change(struct s_smc *smc, int c_state)
+{
+#ifdef DRIVERDEBUG
+ char *s;
+
+ switch (c_state) {
+ case SC0_ISOLATED:
+ s = "SC0_ISOLATED";
+ break;
+ case SC1_WRAP_A:
+ s = "SC1_WRAP_A";
+ break;
+ case SC2_WRAP_B:
+ s = "SC2_WRAP_B";
+ break;
+ case SC4_THRU_A:
+ s = "SC4_THRU_A";
+ break;
+ case SC5_THRU_B:
+ s = "SC5_THRU_B";
+ break;
+ case SC7_WRAP_S:
+ s = "SC7_WRAP_S";
+ break;
+ case SC9_C_WRAP_A:
+ s = "SC9_C_WRAP_A";
+ break;
+ case SC10_C_WRAP_B:
+ s = "SC10_C_WRAP_B";
+ break;
+ case SC11_C_WRAP_S:
+ s = "SC11_C_WRAP_S";
+ break;
+ default:
+ PRINTK(KERN_INFO "cfm_state_change: unknown %d\n", c_state);
+ return;
+ }
+ PRINTK(KERN_INFO "cfm_state_change: %s\n", s);
+#endif // DRIVERDEBUG
+} // cfm_state_change
+
+
+/************************
+ *
+ * ecm_state_change
+ *
+ * Sets ECM state in custom statistics.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * e_state - Possible values are:
+ *
+ * SC0_ISOLATED, SC1_WRAP_A (5), SC2_WRAP_B (6), SC4_THRU_A (12),
+ * SC5_THRU_B (7), SC7_WRAP_S (8)
+ * Out
+ * Nothing.
+ *
+ ************************/
+void ecm_state_change(struct s_smc *smc, int e_state)
+{
+#ifdef DRIVERDEBUG
+ char *s;
+
+ switch (e_state) {
+ case EC0_OUT:
+ s = "EC0_OUT";
+ break;
+ case EC1_IN:
+ s = "EC1_IN";
+ break;
+ case EC2_TRACE:
+ s = "EC2_TRACE";
+ break;
+ case EC3_LEAVE:
+ s = "EC3_LEAVE";
+ break;
+ case EC4_PATH_TEST:
+ s = "EC4_PATH_TEST";
+ break;
+ case EC5_INSERT:
+ s = "EC5_INSERT";
+ break;
+ case EC6_CHECK:
+ s = "EC6_CHECK";
+ break;
+ case EC7_DEINSERT:
+ s = "EC7_DEINSERT";
+ break;
+ default:
+ s = "unknown";
+ break;
+ }
+ PRINTK(KERN_INFO "ecm_state_change: %s\n", s);
+#endif //DRIVERDEBUG
+} // ecm_state_change
+
+
+/************************
+ *
+ * rmt_state_change
+ *
+ * Sets RMT state in custom statistics.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ *
+ * r_state - Possible values are:
+ *
+ * RM0_ISOLATED, RM1_NON_OP, RM2_RING_OP, RM3_DETECT,
+ * RM4_NON_OP_DUP, RM5_RING_OP_DUP, RM6_DIRECTED, RM7_TRACE
+ * Out
+ * Nothing.
+ *
+ ************************/
+void rmt_state_change(struct s_smc *smc, int r_state)
+{
+#ifdef DRIVERDEBUG
+ char *s;
+
+ switch (r_state) {
+ case RM0_ISOLATED:
+ s = "RM0_ISOLATED";
+ break;
+ case RM1_NON_OP:
+ s = "RM1_NON_OP - not operational";
+ break;
+ case RM2_RING_OP:
+ s = "RM2_RING_OP - ring operational";
+ break;
+ case RM3_DETECT:
+ s = "RM3_DETECT - detect dupl addresses";
+ break;
+ case RM4_NON_OP_DUP:
+ s = "RM4_NON_OP_DUP - dupl. addr detected";
+ break;
+ case RM5_RING_OP_DUP:
+ s = "RM5_RING_OP_DUP - ring oper. with dupl. addr";
+ break;
+ case RM6_DIRECTED:
+ s = "RM6_DIRECTED - sending directed beacons";
+ break;
+ case RM7_TRACE:
+ s = "RM7_TRACE - trace initiated";
+ break;
+ default:
+ s = "unknown";
+ break;
+ }
+ PRINTK(KERN_INFO "[rmt_state_change: %s]\n", s);
+#endif // DRIVERDEBUG
+} // rmt_state_change
+
+
+/************************
+ *
+ * drv_reset_indication
+ *
+ * This function is called by the SMT when it has detected a severe
+ * hardware problem. The driver should perform a reset on the adapter
+ * as soon as possible, but not from within this function.
+ * Args
+ * smc - A pointer to the SMT context struct.
+ * Out
+ * Nothing.
+ *
+ ************************/
+void drv_reset_indication(struct s_smc *smc)
+{
+ PRINTK(KERN_INFO "entering drv_reset_indication\n");
+
+ smc->os.ResetRequested = TRUE; // Set flag.
+
+} // drv_reset_indication
+
+
+
+//--------------- functions for use as a module ----------------
+
+#ifdef MODULE
+/************************
+ *
+ * Note now that module autoprobing is allowed under PCI. The
+ * IRQ lines will not be auto-detected; instead I'll rely on the BIOSes
+ * to "do the right thing".
+ *
+ ************************/
+#define LP(a) ((struct s_smc*)(a))
+static struct device *mdev = NULL;
+
+/************************
+ *
+ * init_module
+ *
+ * If compiled as a module, find
+ * adapters and initialize them.
+ *
+ ************************/
+int init_module(void)
+{
+ struct device *p;
+
+ PRINTK(KERN_INFO "FDDI init module\n");
+ if ((mdev = insert_device(NULL, skfp_probe)) == NULL)
+ return -ENOMEM;
+
+ for (p = mdev; p != NULL; p = LP(p->priv)->os.next_module) {
+ PRINTK(KERN_INFO "device to register: %s\n", p->name);
+ if (register_netdev(p) != 0) {
+ printk("skfddi init_module failed\n");
+ return -EIO;
+ }
+ }
+
+ PRINTK(KERN_INFO "+++++ exit with success +++++\n");
+ return 0;
+} // init_module
+
+/************************
+ *
+ * cleanup_module
+ *
+ * Release all resources claimed by this module.
+ *
+ ************************/
+void cleanup_module(void)
+{
+ PRINTK(KERN_INFO "cleanup_module\n");
+ while (mdev != NULL) {
+ mdev = unlink_modules(mdev);
+ }
+ return;
+} // cleanup_module
+
+
+/************************
+ *
+ * unlink_modules
+ *
+ * Unregister devices and release their memory.
+ *
+ ************************/
+static struct device *unlink_modules(struct device *p)
+{
+ struct device *next = NULL;
+
+ if (p->priv) { /* Private areas allocated? */
+ struct s_smc *lp = (struct s_smc *) p->priv;
+
+ next = lp->os.next_module;
+
+ if (lp->os.SharedMemAddr) {
+ kfree(lp->os.SharedMemAddr);
+ }
+ release_region(p->base_addr,
+ (lp->os.bus_type == SK_BUS_TYPE_PCI ? FP_IO_LEN : 0));
+ }
+ unregister_netdev(p);
+ printk("%s: unloaded\n", p->name);
+ kfree(p); /* Free the device structure */
+
+ return next;
+} // unlink_modules
+
+
+#endif /* MODULE */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)