diff options
Diffstat (limited to 'drivers/net/skfp/skfddi.c')
| -rw-r--r-- | drivers/net/skfp/skfddi.c | 2495 |
1 files changed, 2495 insertions, 0 deletions
diff --git a/drivers/net/skfp/skfddi.c b/drivers/net/skfp/skfddi.c new file mode 100644 index 000000000..6aceec4d5 --- /dev/null +++ b/drivers/net/skfp/skfddi.c @@ -0,0 +1,2495 @@ +/* + * 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) + * + * 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. + * + * Compilation options (-Dxxx): + * DRIVERDEBUG print lots of messages to log file + * DUMPPACKETS print received/transmitted packets to logfile + * + * Limitations: + * I changed the driver to support memory mapped I/O, so it + * might run on non-x86 architectures (not tested). + * But the hardware module does not yet support 64 bit OS'es. + */ + +/* Version information string - should be updated prior to */ +/* each new release!!! */ +#define VERSION "2.05" + +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 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 enet_statistics *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); + + +// 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 net_device *unlink_modules(struct net_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 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_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; + } + + /* Turn off IO mapped space and enable mastering */ + + PRINTK(KERN_INFO "Command Reg: %04x\n", command); + command |= PCI_COMMAND_MASTER; + command &= ~PCI_COMMAND_IO; + pci_write_config_word(pdev, PCI_COMMAND, command); + + port = pdev->resource[0].start; + + 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 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 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_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 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_device\n"); + len = sizeof(struct net_device) + 8 + sizeof(struct s_smc); + new = (struct net_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 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_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 net_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; + + /* 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 device\n", 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 enet_statistics *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 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 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 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 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 (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 net_device *dev) +{ + skfddi_priv *bp = PRIV(dev); + + PRINTK(KERN_INFO "skfp_send_pkt\n"); + + /* + * 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. + 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) { + 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); + + 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_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\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: %08lx\n", (ulong) virt); + PRINTK(KERN_INFO "bus addr: %08lx\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 int) 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. + * 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_irq(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: 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, GFP_ATOMIC); + if (skb) { + // we got a skb + rxd->rxd_os.skb = skb; + 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, GFP_ATOMIC); + if (skb) { + // we got a skb + 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, GFP_ATOMIC); + if (!skb) { + PRINTK("fddi: Local SMT: skb memory exhausted.\n"); + return (0); + } + 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(%08lXh)\n", (unsigned long) status); +} // 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; + default: + s = "unknown"; + break; + } + 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 net_device *mdev = NULL; + +/************************ + * + * 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 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 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) { + 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 */ |