skfddi.c
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- /*
- * 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
- *
- * Address all question 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
- * 22-Nov-99 CG Included in kernel source.
- * 07-May-00 DM 64 bit fixes, new dma interface
- * 06-May-02 ML Structure fixes
- *
- * 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 " forn"
- " 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/slab.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 net_device *dev);
- // Define module-wide (static) routines
- static struct net_device *alloc_device(struct net_device *dev, u_long iobase);
- static struct net_device *insert_device(struct net_device *dev,
- int (*init) (struct net_device *));
- static int fddi_dev_index(unsigned char *s);
- static void init_dev(struct net_device *dev, u_long iobase);
- static void link_modules(struct net_device *dev, struct net_device *tmp);
- static int skfp_driver_init(struct net_device *dev);
- static int skfp_open(struct net_device *dev);
- static int skfp_close(struct net_device *dev);
- static void skfp_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- static struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev);
- static void skfp_ctl_set_multicast_list(struct net_device *dev);
- static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev);
- static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr);
- static int skfp_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
- static int skfp_send_pkt(struct sk_buff *skb, struct net_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);
- static struct pci_device_id skfddi_pci_tbl[] __initdata = {
- { PCI_VENDOR_ID_SK, PCI_DEVICE_ID_SK_FP, PCI_ANY_ID, PCI_ANY_ID, },
- { } /* Terminating entry */
- };
- MODULE_DEVICE_TABLE(pci, skfddi_pci_tbl);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Mirko Lindner <mlindner@syskonnect.de>");
- // Define module-wide (static) variables
- static int num_boards; /* total number of adapters configured */
- static int num_fddi;
- static int autoprobed;
- #ifdef MODULE
- int init_module(void);
- void cleanup_module(void);
- static struct net_device *unlink_modules(struct net_device *p);
- static int loading_module = 1;
- #else
- static int loading_module;
- #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 net_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 net_device *tmp = dev;
- u8 first_dev_used = 0;
- u16 SubSysId;
- PRINTK(KERN_INFO "entering skfp_proben");
- /*
- * 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_proben");
- if (dev != NULL) {
- if ((strncmp(dev->name, "fddi", 4) == 0) &&
- (dev->base_addr != 0)) {
- return (0);
- }
- return (-ENODEV);
- }
- }
- autoprobed = 1; /* set global flag */
- printk("%sn", boot_msg);
- /* Scan for Syskonnect FDDI PCI controllers */
- if (!pci_present()) { /* is PCI BIOS even present? */
- printk("no PCI BIOS presentn");
- return (-ENODEV);
- }
- for (i = 0; i < SKFP_MAX_NUM_BOARDS; i++) { // scan for PCI cards
- PRINTK(KERN_INFO "Check device %dn", i);
- if ((pdev=pci_find_device(PCI_VENDOR_ID_SK, PCI_DEVICE_ID_SK_FP,
- pdev)) == 0) {
- break;
- }
- if (pci_enable_device(pdev))
- continue;
- #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 enabledn");
- continue;
- }
- /* Turn off memory mapped space and enable mastering */
- PRINTK(KERN_INFO "Command Reg: %04xn", 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 enabledn");
- continue;
- }
- /* Turn off IO mapped space and enable mastering */
- PRINTK(KERN_INFO "Command Reg: %04xn", command);
- command |= PCI_COMMAND_MASTER;
- command &= ~PCI_COMMAND_IO;
- pci_write_config_word(pdev, PCI_COMMAND, command);
- port = pci_resource_start(pdev, 0);
- port = (unsigned long)ioremap(port, 0x4000);
- 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 foundn",
- 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 foundn");
- 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 net_device *alloc_device(struct net_device *dev, u_long iobase)
- {
- struct net_device *adev = NULL;
- int fixed = 0, new_dev = 0;
- PRINTK(KERN_INFO "entering alloc_devicen");
- 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 net_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->if_port = 0; /* not applicable to FDDI adapters */
- dev->dma = 0; /* Bus Master DMA doesn't require channel */
- dev->irq = 0;
- netif_start_queue(dev);
- 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 net_device *insert_device(struct net_device *dev,
- int (*init) (struct net_device *))
- {
- struct net_device *new;
- int len;
- PRINTK(KERN_INFO "entering insert_devicen");
- len = sizeof(struct net_device) + sizeof(struct s_smc);
- new = (struct net_device *) kmalloc(len, GFP_KERNEL);
- if (new == NULL) {
- printk("fddi%d: Device not initialised, insufficient memoryn",
- num_fddi);
- return NULL;
- } else {
- memset((char *) new, 0, len);
- new->priv = (struct s_smc *) (new + 1);
- 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 net_device *dev, struct net_device *tmp)
- {
- struct net_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 net_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_initn");
- // 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);
-
- // Allocate invalid frame
- bp->LocalRxBuffer = pci_alloc_consistent(&bp->pdev, MAX_FRAME_SIZE, &bp->LocalRxBufferDMA);
- if (!bp->LocalRxBuffer) {
- printk("could not allocate mem for ");
- printk("LocalRxBuffer: %d byten", MAX_FRAME_SIZE);
- goto fail;
- }
- // Determine the required size of the 'shared' memory area.
- bp->SharedMemSize = mac_drv_check_space();
- PRINTK(KERN_INFO "Memory for HWM: %ldn", bp->SharedMemSize);
- if (bp->SharedMemSize > 0) {
- bp->SharedMemSize += 16; // for descriptor alignment
- bp->SharedMemAddr = pci_alloc_consistent(&bp->pdev,
- bp->SharedMemSize,
- &bp->SharedMemDMA);
- if (!bp->SharedMemSize) {
- printk("could not allocate mem for ");
- printk("hardware module: %ld byten",
- bp->SharedMemSize);
- goto fail;
- }
- 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");
- goto fail;
- }
- read_address(smc, NULL);
- PRINTK(KERN_INFO "HW-Addr: %02x %02x %02x %02x %02x %02xn",
- 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);
- fail:
- if (bp->SharedMemAddr) {
- pci_free_consistent(&bp->pdev,
- bp->SharedMemSize,
- bp->SharedMemAddr,
- bp->SharedMemDMA);
- bp->SharedMemAddr = NULL;
- }
- if (bp->LocalRxBuffer) {
- pci_free_consistent(&bp->pdev, MAX_FRAME_SIZE,
- bp->LocalRxBuffer, bp->LocalRxBufferDMA);
- bp->LocalRxBuffer = NULL;
- }
- return (-1);
- } // 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 net_device *dev)
- {
- struct s_smc *smc = (struct s_smc *) dev->priv;
- PRINTK(KERN_INFO "entering skfp_openn");
- /* 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 busyn", 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;
- /* 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 net_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);
- netif_stop_queue(dev);
- /* 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 net_device *dev = (struct net_device *) dev_id;
- struct s_smc *smc; /* private board structure pointer */
- skfddi_priv *bp = PRIV(dev);
- if (dev == NULL) {
- printk("%s: irq %d for unknown devicen", dev->name, irq);
- return;
- }
- smc = (struct s_smc *) dev->priv;
- // IRQs enabled or disabled ?
- if (inpd(ADDR(B0_IMSK)) == 0) {
- // IRQs are disabled: must be shared interrupt
- return;
- }
- // Note: At this point, IRQs are enabled.
- if ((inpd(ISR_A) & smc->hw.is_imask) == 0) { // IRQ?
- // Adapter did not issue an IRQ: must be shared interrupt
- 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;
- }
- 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 net_device_stats *skfp_ctl_get_stats(struct net_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 net_device_stats *) &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 acquires 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 net_device *dev)
- {
- skfddi_priv *bp = PRIV(dev);
- 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 net_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 ENABLEDn");
- }
- /* Else, update multicast address table */
- else {
- mac_drv_rx_mode(smc, RX_DISABLE_PROMISC);
- PRINTK(KERN_INFO "PROMISCUOUS MODE DISABLEDn");
- // 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 ADDRESSESn");
- } 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 %02xn",
- 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 ADDRESSESn");
- }
- } else { // no MC addresses
- PRINTK(KERN_INFO "DISABLE ALL MC ADDRESSESn");
- }
- /* 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 net_device *dev, void *addr)
- {
- struct s_smc *smc = (struct s_smc *) dev->priv;
- struct sockaddr *p_sockaddr = (struct sockaddr *) addr;
- skfddi_priv *bp = (skfddi_priv *) & smc->os;
- 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 net_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 (!capable(CAP_NET_ADMIN)) {
- memset(&lp->MacStat, 0, sizeof(lp->MacStat));
- } else {
- status = -EPERM;
- }
- break;
- default:
- printk("ioctl for %s: unknow cmd: %04xn", 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 pci_map_single().
- *
- * 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 net_device *dev)
- {
- skfddi_priv *bp = PRIV(dev);
- PRINTK(KERN_INFO "skfp_send_pktn");
- /*
- * 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
- netif_start_queue(dev);
- dev_kfree_skb(skb);
- return (0); /* return "success" */
- }
- if (bp->QueueSkb == 0) { // return with tbusy set: queue full
- netif_stop_queue(dev);
- return 1;
- }
- bp->QueueSkb--;
- skb_queue_tail(&bp->SendSkbQueue, skb);
- send_queued_packets((struct s_smc *) dev->priv);
- if (bp->QueueSkb == 0) {
- netif_stop_queue(dev);
- }
- 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.
- dma_addr_t dma_address;
- unsigned long Flags;
- int frame_status; // HWM tx frame status.
- PRINTK(KERN_INFO "send queued packetsn");
- for (;;) {
- // send first buffer from queue
- skb = skb_dequeue(&bp->SendSkbQueue);
- if (!skb) {
- PRINTK(KERN_INFO "queue emptyn");
- 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) {
- PRINTK("%s: out of TXDs.n", bp->dev->name);
- } else {
- PRINTK("%s: out of transmit resources",
- bp->dev->name);
- }
- // 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);
- dma_address = pci_map_single(&bp->pdev, skb->data,
- skb->len, PCI_DMA_TODEVICE);
- if (frame_status & LAN_TX) {
- txd->txd_os.skb = skb; // save skb
- txd->txd_os.dma_addr = dma_address; // save dma mapping
- }
- hwm_tx_frag(smc, skb->data, dma_address, skb->len,
- frame_status | FIRST_FRAG | LAST_FRAG | EN_IRQ_EOF);
- if (!(frame_status & LAN_TX)) { // local only frame
- pci_unmap_single(&bp->pdev, dma_address,
- skb->len, PCI_DMA_TODEVICE);
- dev_kfree_skb_irq(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);
- netif_start_queue(bp->dev);// 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 (%d bytes), ", size);
- virt = (void *) (smc->os.SharedMemAddr + smc->os.SharedMemHeap);
- if ((smc->os.SharedMemHeap + size) > smc->os.SharedMemSize) {
- printk("Unexpected SMT memory size requested: %dn", size);
- return (NULL);
- }
- smc->os.SharedMemHeap += size; // Move heap pointer.
- PRINTK(KERN_INFO "mac_drv_get_space endn");
- PRINTK(KERN_INFO "virt addr: %lxn", (ulong) virt);
- PRINTK(KERN_INFO "bus addr: %lxn", (ulong)
- (smc->os.SharedMemDMA +
- ((char *) virt - (char *)smc->os.SharedMemAddr)));
- 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-swappable.
- * 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_memn");
- // Descriptor memory must be aligned on 16-byte boundary.
- virt = mac_drv_get_space(smc, size);
- size = (u_int) (16 - (((unsigned long) virt) & 15UL));
- size = size % 16;
- 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 (smc->os.SharedMemDMA +
- ((char *) virt - (char *)smc->os.SharedMemAddr));
- } // 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 (smc->os.SharedMemDMA +
- ((char *) virt - (char *)smc->os.SharedMemAddr));
- } // 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)
- {
- /* For TX buffers, there are two cases. If it is an SMT transmit
- * buffer, there is nothing to do since we use consistent memory
- * for the 'shared' memory area. The other case is for normal
- * transmit packets given to us by the networking stack, and in
- * that case we cleanup the PCI DMA mapping in mac_drv_tx_complete
- * below.
- *
- * For RX buffers, we have to unmap dynamic PCI DMA mappings here
- * because the hardware module is about to potentially look at
- * the contents of the buffer. If we did not call the PCI DMA
- * unmap first, the hardware module could read inconsistent data.
- */
- if (flag & DMA_WR) {
- skfddi_priv *bp = (skfddi_priv *) & smc->os;
- volatile struct s_smt_fp_rxd *r = &descr->r;
- /* If SKB is NULL, we used the local buffer. */
- if (r->rxd_os.skb && r->rxd_os.dma_addr) {
- int MaxFrameSize = bp->MaxFrameSize;
- pci_unmap_single(&bp->pdev, r->rxd_os.dma_addr,
- MaxFrameSize, PCI_DMA_FROMDEVICE);
- r->rxd_os.dma_addr = 0;
- }
- }
- } // 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_completen");
- // 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;
- // release the DMA mapping
- pci_unmap_single(&smc->os.pdev, txd->txd_os.dma_addr,
- skb->len, PCI_DMA_TODEVICE);
- txd->txd_os.dma_addr = 0;
- smc->os.MacStat.tx_packets++; // Count transmitted packets.
- smc->os.MacStat.tx_bytes+=skb->len; // Count bytes
- // free the skb
- dev_kfree_skb_irq(skb);
- PRINTK(KERN_INFO "leaving mac_drv_tx_completen");
- } // 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 %02xn",
- 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 "%sn", 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: 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 rxdn");
- smc->os.MacStat.rx_errors++;
- goto RequeueRxd;
- }
- virt = skb->data;
- // The DMA mapping was released in dma_complete above.
- 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 foundn");
- // 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);
- bp->dev->last_rx = jiffies;
- 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;
- dma_addr_t 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 = pci_map_single(&smc->os.pdev,
- v_addr,
- MaxFrameSize,
- PCI_DMA_FROMDEVICE);
- rxd->rxd_os.dma_addr = b_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 = smc->os.LocalRxBufferDMA;
- }
- } else {
- // we use skb from old rxd
- rxd->rxd_os.skb = skb;
- v_addr = skb->data;
- b_addr = pci_map_single(&smc->os.pdev,
- v_addr,
- MaxFrameSize,
- PCI_DMA_FROMDEVICE);
- rxd->rxd_os.dma_addr = b_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_rxdn");
- // 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 = pci_map_single(&smc->os.pdev,
- v_addr,
- MaxFrameSize,
- PCI_DMA_FROMDEVICE);
- rxd->rxd_os.dma_addr = b_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 = smc->os.LocalRxBufferDMA;
- }
- 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_rxdn");
- } // 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_rxdn");
- 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) {
- skfddi_priv *bp = (skfddi_priv *) & smc->os;
- int MaxFrameSize = bp->MaxFrameSize;
- pci_unmap_single(&bp->pdev, rxd->rxd_os.dma_addr,
- MaxFrameSize, PCI_DMA_FROMDEVICE);
- 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 framen");
- 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);
- skb->dev->last_rx = jiffies;
- 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_countern");
- 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 %dn", c_state);
- return;
- }
- PRINTK(KERN_INFO "cfm_state_change: %sn", 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: %sn", 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_indicationn");
- 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 net_device *mdev;
- /************************
- *
- * init_module
- *
- * If compiled as a module, find
- * adapters and initialize them.
- *
- ************************/
- int init_module(void)
- {
- struct net_device *p;
- PRINTK(KERN_INFO "FDDI init modulen");
- 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: %sn", p->name);
- if (register_netdev(p) != 0) {
- printk("skfddi init_module failedn");
- 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_modulen");
- while (mdev != NULL) {
- mdev = unlink_modules(mdev);
- }
- return;
- } // cleanup_module
- /************************
- *
- * unlink_modules
- *
- * Unregister devices and release their memory.
- *
- ************************/
- static struct net_device *unlink_modules(struct net_device *p)
- {
- struct net_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) {
- pci_free_consistent(&lp->os.pdev,
- lp->os.SharedMemSize,
- lp->os.SharedMemAddr,
- lp->os.SharedMemDMA);
- lp->os.SharedMemAddr = NULL;
- }
- if (lp->os.LocalRxBuffer) {
- pci_free_consistent(&lp->os.pdev,
- MAX_FRAME_SIZE,
- lp->os.LocalRxBuffer,
- lp->os.LocalRxBufferDMA);
- lp->os.LocalRxBuffer = NULL;
- }
- release_region(p->base_addr,
- (lp->os.bus_type == SK_BUS_TYPE_PCI ? FP_IO_LEN : 0));
- }
- unregister_netdev(p);
- printk("%s: unloadedn", p->name);
- kfree(p); /* Free the device structure */
- return next;
- } // unlink_modules
- #endif /* MODULE */