patch-2.3.21 linux/drivers/net/tokenring/sktr.c
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- Lines: 2708
- Date:
Mon Oct 11 10:13:24 1999
- Orig file:
v2.3.20/linux/drivers/net/tokenring/sktr.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.3.20/linux/drivers/net/tokenring/sktr.c linux/drivers/net/tokenring/sktr.c
@@ -0,0 +1,2707 @@
+/*
+ * sktr.c: A network driver for the SysKonnect Token Ring ISA/PCI Adapters.
+ *
+ * Written 1997 by Christoph Goos
+ *
+ * A fine result of the Linux Systems Network Architecture Project.
+ * http://samba.anu.edu.au/linux-sna/
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU Public License, incorporated herein by reference.
+ *
+ * This device driver works with the following SysKonnect adapters:
+ * - SysKonnect TR4/16(+) ISA (SK-4190)
+ * - SysKonnect TR4/16(+) PCI (SK-4590)
+ * - SysKonnect TR4/16 PCI (SK-4591)
+ *
+ * Sources:
+ * - The hardware related parts of this driver are take from
+ * the SysKonnect Token Ring driver for Windows NT.
+ * - I used the IBM Token Ring driver 'ibmtr.c' as a base for this
+ * driver, as well as the 'skeleton.c' driver by Donald Becker.
+ * - Also various other drivers in the linux source tree were taken
+ * as samples for some tasks.
+ *
+ * Maintainer(s):
+ * JS Jay Schulist jschlst@samba.anu.edu.au
+ * CG Christoph Goos cgoos@syskonnect.de
+ * AF Adam Fritzler mid@auk.cx
+ *
+ * Modification History:
+ * 29-Aug-97 CG Created
+ * 04-Apr-98 CG Fixed problems caused by tok_timer_check
+ * 10-Apr-98 CG Fixed lockups at cable disconnection
+ * 27-May-98 JS Formated to Linux Kernel Format
+ * 31-May-98 JS Hacked in PCI support
+ * 16-Jun-98 JS Modulized for multiple cards with one driver
+ * 21-Sep-99 CG Fixed source routing issues for 2.2 kernels
+ * 21-Sep-99 AF Added multicast changes recommended by
+ * Jochen Friedrich <jochen@nwe.de> (untested)
+ * Added detection of compatible Compaq PCI card
+ *
+ * To do:
+ * 1. Selectable 16 Mbps or 4Mbps
+ * 2. Multi/Broadcast packet handling (might be done)
+ *
+ */
+
+static const char *version = "sktr.c: v1.01 08/29/97 by Christoph Goos\n";
+
+#ifdef MODULE
+#include <linux/module.h>
+#include <linux/version.h>
+#endif
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/malloc.h>
+#include <linux/string.h>
+#include <linux/time.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/trdevice.h>
+
+#include "sktr.h" /* Our Stuff */
+#include "sktr_firmware.h" /* SysKonnect adapter firmware */
+
+/* A zero-terminated list of I/O addresses to be probed. */
+static unsigned int sktr_portlist[] __initdata = {
+ 0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,
+ 0
+};
+
+/* A zero-terminated list of IRQs to be probed.
+ * Used again after initial probe for sktr_chipset_init, called from sktr_open.
+ */
+static unsigned short sktr_irqlist[] = {
+ 3, 5, 9, 10, 11, 12, 15,
+ 0
+};
+
+/* A zero-terminated list of DMAs to be probed. */
+static int sktr_dmalist[] __initdata = {
+ 5, 6, 7,
+ 0
+};
+
+/* Card names */
+static char *pci_cardname = "SK NET TR 4/16 PCI\0";
+static char *isa_cardname = "SK NET TR 4/16 ISA\0";
+static char *AdapterName;
+
+/* Use 0 for production, 1 for verification, 2 for debug, and
+ * 3 for very verbose debug.
+ */
+#ifndef SKTR_DEBUG
+#define SKTR_DEBUG 1
+#endif
+static unsigned int sktr_debug = SKTR_DEBUG;
+
+/* The number of low I/O ports used by the tokencard. */
+#define SKTR_IO_EXTENT 32
+
+/* Index to functions, as function prototypes.
+ * Alphabetical by function name.
+ */
+
+/* "B" */
+static int sktr_bringup_diags(struct net_device *dev);
+/* "C" */
+static void sktr_cancel_tx_queue(struct net_local* tp);
+static int sktr_chipset_init(struct net_device *dev);
+static void sktr_chk_irq(struct net_device *dev);
+static unsigned char sktr_chk_frame(struct net_device *dev, unsigned char *Addr);
+static void sktr_chk_outstanding_cmds(struct net_device *dev);
+static void sktr_chk_src_addr(unsigned char *frame, unsigned char *hw_addr);
+static unsigned char sktr_chk_ssb(struct net_local *tp, unsigned short IrqType);
+static int sktr_close(struct net_device *dev);
+static void sktr_cmd_status_irq(struct net_device *dev);
+/* "D" */
+static void sktr_disable_interrupts(struct net_device *dev);
+static void sktr_dump(unsigned char *Data, int length);
+/* "E" */
+static void sktr_enable_interrupts(struct net_device *dev);
+static void sktr_exec_cmd(struct net_device *dev, unsigned short Command);
+static void sktr_exec_sifcmd(struct net_device *dev, unsigned int WriteValue);
+/* "F" */
+/* "G" */
+static struct enet_statistics *sktr_get_stats(struct net_device *dev);
+/* "H" */
+static void sktr_hardware_send_packet(struct net_device *dev,
+ struct net_local* tp);
+/* "I" */
+static int sktr_init_adapter(struct net_device *dev);
+static int sktr_init_card(struct net_device *dev);
+static void sktr_init_ipb(struct net_local *tp);
+static void sktr_init_net_local(struct net_device *dev);
+static void sktr_init_opb(struct net_local *tp);
+static void sktr_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static int sktr_isa_chk_card(struct net_device *dev, int ioaddr);
+static int sktr_isa_chk_ioaddr(int ioaddr);
+/* "O" */
+static int sktr_open(struct net_device *dev);
+static void sktr_open_adapter(struct net_device *dev);
+/* "P" */
+static int sktr_pci_chk_card(struct net_device *dev);
+int sktr_probe(struct net_device *dev);
+static int sktr_probe1(struct net_device *dev, int ioaddr);
+/* "R" */
+static void sktr_rcv_status_irq(struct net_device *dev);
+static void sktr_read_addr(struct net_device *dev, unsigned char *Address);
+static void sktr_read_ptr(struct net_device *dev);
+static void sktr_read_ram(struct net_device *dev, unsigned char *Data,
+ unsigned short Address, int Length);
+static int sktr_reset_adapter(struct net_device *dev);
+static void sktr_reset_interrupt(struct net_device *dev);
+static void sktr_ring_status_irq(struct net_device *dev);
+/* "S" */
+static int sktr_send_packet(struct sk_buff *skb, struct net_device *dev);
+static void sktr_set_multicast_list(struct net_device *dev);
+/* "T" */
+static void sktr_timer_chk(unsigned long data);
+static void sktr_timer_end_wait(unsigned long data);
+static void sktr_tx_status_irq(struct net_device *dev);
+/* "U" */
+static void sktr_update_rcv_stats(struct net_local *tp,
+ unsigned char DataPtr[], unsigned int Length);
+/* "W" */
+static void sktr_wait(unsigned long time);
+static void sktr_write_rpl_status(RPL *rpl, unsigned int Status);
+static void sktr_write_tpl_status(TPL *tpl, unsigned int Status);
+
+/*
+ * Check for a network adapter of this type, and return '0' if one exists.
+ * If dev->base_addr == 0, probe all likely locations.
+ * If dev->base_addr == 1, always return failure.
+ */
+int __init sktr_probe(struct net_device *dev)
+{
+ int i;
+ int base_addr = dev ? dev->base_addr : 0;
+
+ if(base_addr > 0x1ff) /* Check a single specified location. */
+ return (sktr_probe1(dev, base_addr));
+ else if(base_addr != 0) /* Don't probe at all. */
+ return (-ENXIO);
+
+ for(i = 0; sktr_portlist[i]; i++)
+ {
+ int ioaddr = sktr_portlist[i];
+ if(check_region(ioaddr, SKTR_IO_EXTENT))
+ continue;
+ if(sktr_probe1(dev, ioaddr))
+ {
+#ifndef MODULE
+ tr_freedev(dev);
+#endif
+ }
+ else
+ return (0);
+ }
+
+ return (-ENODEV);
+}
+
+/*
+ * Detect and setup the PCI SysKonnect TR cards in slot order.
+ */
+static int __init sktr_pci_chk_card(struct net_device *dev)
+{
+ static int pci_index = 0;
+ unsigned char pci_bus, pci_device_fn;
+
+ if(!pci_present())
+ return (-1); /* No PCI present. */
+
+ for(; pci_index < 0xff; pci_index++)
+ {
+ unsigned int pci_irq_line;
+ struct pci_dev *pdev;
+ unsigned short pci_command, new_command, vendor, device;
+ unsigned int pci_ioaddr;
+
+ if(pcibios_find_class(PCI_CLASS_NETWORK_TOKEN_RING << 8,
+ pci_index, &pci_bus, &pci_device_fn)
+ != PCIBIOS_SUCCESSFUL)
+ {
+ break;
+ }
+
+ pcibios_read_config_word(pci_bus, pci_device_fn,
+ PCI_VENDOR_ID, &vendor);
+ pcibios_read_config_word(pci_bus, pci_device_fn,
+ PCI_DEVICE_ID, &device);
+
+ pdev = pci_find_slot(pci_bus, pci_device_fn);
+ pci_irq_line = pdev->irq;
+ pci_ioaddr = pdev->resource[0].start;
+
+ pcibios_read_config_word(pci_bus, pci_device_fn,
+ PCI_COMMAND, &pci_command);
+
+ /* Remove I/O space marker in bit 0. */
+ pci_ioaddr &= ~3;
+
+ if((vendor != PCI_VENDOR_ID_SK) &&
+ (vendor != PCI_VENDOR_ID_COMPAQ))
+ continue;
+
+ if((vendor == PCI_VENDOR_ID_SK) &&
+ (device != PCI_DEVICE_ID_SK_TR))
+ continue;
+ else if((vendor == PCI_VENDOR_ID_COMPAQ) &&
+ (device != PCI_DEVICE_ID_COMPAQ_TOKENRING))
+ continue;
+
+ if(check_region(pci_ioaddr, SKTR_IO_EXTENT))
+ continue;
+ request_region(pci_ioaddr, SKTR_IO_EXTENT, pci_cardname);
+ if(request_irq(pdev->irq, sktr_interrupt, SA_SHIRQ,
+ pci_cardname, dev))
+ return (-ENODEV); /* continue; ?? */
+
+ AdapterName = pci_cardname;
+
+ new_command = (pci_command|PCI_COMMAND_MASTER|PCI_COMMAND_IO);
+
+ if(pci_command != new_command)
+ {
+ printk("The PCI BIOS has not enabled this"
+ "device! Updating PCI command %4.4x->%4.4x.\n",
+ pci_command, new_command);
+ pcibios_write_config_word(pci_bus, pci_device_fn,
+ PCI_COMMAND, new_command);
+ }
+
+ /* At this point we have found a valid PCI TR card. */
+ dev->base_addr = pci_ioaddr;
+ dev->irq = pci_irq_line;
+ dev->dma = 0;
+
+ printk("%s: %s found at %#4x, using IRQ %d.\n",
+ dev->name, AdapterName, pci_ioaddr, dev->irq);
+
+ return (0);
+ }
+
+ return (-1);
+}
+
+/*
+ * Detect and setup the ISA SysKonnect TR cards.
+ */
+static int __init sktr_isa_chk_card(struct net_device *dev, int ioaddr)
+{
+ int i, err;
+ unsigned long flags;
+
+ err = sktr_isa_chk_ioaddr(ioaddr);
+ if(err < 0)
+ return (-ENODEV);
+
+ if(virt_to_bus((void*)((unsigned long)dev->priv+sizeof(struct net_local)))
+ > ISA_MAX_ADDRESS)
+ {
+ printk("%s: Memory not accessible for DMA\n", dev->name);
+ kfree(dev->priv);
+ return (-EAGAIN);
+ }
+
+ AdapterName = isa_cardname;
+
+ /* Grab the region so that no one else tries to probe our ioports. */
+ request_region(ioaddr, SKTR_IO_EXTENT, AdapterName);
+ dev->base_addr = ioaddr;
+
+ /* Autoselect IRQ and DMA if dev->irq == 0 */
+ if(dev->irq == 0)
+ {
+ for(i = 0; sktr_irqlist[i] != 0; i++)
+ {
+ dev->irq = sktr_irqlist[i];
+ err = request_irq(dev->irq, &sktr_interrupt, 0, AdapterName, dev);
+ if(!err)
+ break;
+ }
+
+ if(sktr_irqlist[i] == 0)
+ {
+ printk("%s: AutoSelect no IRQ available\n", dev->name);
+ return (-EAGAIN);
+ }
+ }
+ else
+ {
+ err = request_irq(dev->irq, &sktr_interrupt, 0, AdapterName, dev);
+ if(err)
+ {
+ printk("%s: Selected IRQ not available\n", dev->name);
+ return (-EAGAIN);
+ }
+ }
+
+ /* Always allocate the DMA channel after IRQ and clean up on failure */
+ if(dev->dma == 0)
+ {
+ for(i = 0; sktr_dmalist[i] != 0; i++)
+ {
+ dev->dma = sktr_dmalist[i];
+ err = request_dma(dev->dma, AdapterName);
+ if(!err)
+ break;
+ }
+
+ if(dev->dma == 0)
+ {
+ printk("%s: AutoSelect no DMA available\n", dev->name);
+ free_irq(dev->irq, NULL);
+ return (-EAGAIN);
+ }
+ }
+ else
+ {
+ err = request_dma(dev->dma, AdapterName);
+ if(err)
+ {
+ printk("%s: Selected DMA not available\n", dev->name);
+ free_irq(dev->irq, NULL);
+ return (-EAGAIN);
+ }
+ }
+
+ flags=claim_dma_lock();
+ disable_dma(dev->dma);
+ set_dma_mode(dev->dma, DMA_MODE_CASCADE);
+ enable_dma(dev->dma);
+ release_dma_lock(flags);
+
+ printk("%s: %s found at %#4x, using IRQ %d and DMA %d.\n",
+ dev->name, AdapterName, ioaddr, dev->irq, dev->dma);
+
+ return (0);
+}
+
+static int __init sktr_probe1(struct net_device *dev, int ioaddr)
+{
+ static unsigned version_printed = 0;
+ struct net_local *tp;
+ int DeviceType = SK_PCI;
+ int err;
+
+ if(sktr_debug && version_printed++ == 0)
+ printk("%s", version);
+
+#ifndef MODULE
+ dev = init_trdev(dev, 0);
+ if(dev == NULL)
+ return (-ENOMEM);
+#endif
+
+ err = sktr_pci_chk_card(dev);
+ if(err < 0)
+ {
+ err = sktr_isa_chk_card(dev, ioaddr);
+ if(err < 0)
+ return (-ENODEV);
+ DeviceType = SK_ISA;
+ }
+
+ /* Setup this devices private information structure */
+ tp = (struct net_local *)kmalloc(sizeof(struct net_local), GFP_KERNEL | GFP_DMA);
+ if(tp == NULL)
+ return (-ENOMEM);
+ memset(tp, 0, sizeof(struct net_local));
+ tp->DeviceType = DeviceType;
+ init_waitqueue_head(&tp->wait_for_tok_int);
+
+ dev->priv = tp;
+ dev->init = sktr_init_card;
+ dev->open = sktr_open;
+ dev->stop = sktr_close;
+ dev->hard_start_xmit = sktr_send_packet;
+ dev->get_stats = sktr_get_stats;
+ dev->set_multicast_list = &sktr_set_multicast_list;
+
+ return (0);
+}
+
+/* Dummy function */
+static int __init sktr_init_card(struct net_device *dev)
+{
+ if(sktr_debug > 3)
+ printk("%s: sktr_init_card\n", dev->name);
+
+ return (0);
+}
+
+/*
+ * This function tests if an adapter is really installed at the
+ * given I/O address. Return negative if no adapter at IO addr.
+ */
+static int __init sktr_isa_chk_ioaddr(int ioaddr)
+{
+ unsigned char old, chk1, chk2;
+
+ old = inb(ioaddr + SIFADR); /* Get the old SIFADR value */
+
+ chk1 = 0; /* Begin with check value 0 */
+ do {
+ /* Write new SIFADR value */
+ outb(chk1, ioaddr + SIFADR);
+
+ /* Read, invert and write */
+ chk2 = inb(ioaddr + SIFADD);
+ chk2 ^= 0x0FE;
+ outb(chk2, ioaddr + SIFADR);
+
+ /* Read, invert and compare */
+ chk2 = inb(ioaddr + SIFADD);
+ chk2 ^= 0x0FE;
+
+ if(chk1 != chk2)
+ return (-1); /* No adapter */
+
+ chk1 -= 2;
+ } while(chk1 != 0); /* Repeat 128 times (all byte values) */
+
+ /* Restore the SIFADR value */
+ outb(old, ioaddr + SIFADR);
+
+ return (0);
+}
+
+/*
+ * Open/initialize the board. This is called sometime after
+ * booting when the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even
+ * registers that "should" only need to be set once at boot, so that
+ * there is non-reboot way to recover if something goes wrong.
+ */
+static int sktr_open(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ int err;
+
+ /* Reset the hardware here. Don't forget to set the station address. */
+ err = sktr_chipset_init(dev);
+ if(err)
+ {
+ printk(KERN_INFO "%s: Chipset initialization error\n",
+ dev->name);
+ return (-1);
+ }
+
+ dev->addr_len = 6;
+ sktr_read_addr(dev, (unsigned char*)dev->dev_addr);
+
+ init_timer(&tp->timer);
+ tp->timer.expires = jiffies + 30*HZ;
+ tp->timer.function = sktr_timer_end_wait;
+ tp->timer.data = (unsigned long)dev;
+ tp->timer.next = NULL;
+ tp->timer.prev = NULL;
+ add_timer(&tp->timer);
+
+ sktr_read_ptr(dev);
+ sktr_enable_interrupts(dev);
+ sktr_open_adapter(dev);
+
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ dev->start = 0;
+
+ /* Wait for interrupt from hardware. If interrupt does not come,
+ * there will be a timeout from the timer.
+ */
+ tp->Sleeping = 1;
+ interruptible_sleep_on(&tp->wait_for_tok_int);
+ del_timer(&tp->timer);
+
+ /* If AdapterVirtOpenFlag is 1, the adapter is now open for use */
+ if(tp->AdapterVirtOpenFlag == 0)
+ {
+ sktr_disable_interrupts(dev);
+ return (-1);
+ }
+
+ dev->start = 1;
+
+ tp->StartTime = jiffies;
+
+ /* Start function control timer */
+ tp->timer.expires = jiffies + 2*HZ;
+ tp->timer.function = sktr_timer_chk;
+ tp->timer.data = (unsigned long)dev;
+ add_timer(&tp->timer);
+
+#ifdef MODULE
+ MOD_INC_USE_COUNT;
+#endif
+
+ return (0);
+}
+
+/*
+ * Timeout function while waiting for event
+ */
+static void sktr_timer_end_wait(unsigned long data)
+{
+ struct net_device *dev = (struct net_device*)data;
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ if(tp->Sleeping)
+ {
+ tp->Sleeping = 0;
+ wake_up_interruptible(&tp->wait_for_tok_int);
+ }
+
+ return;
+}
+
+/*
+ * Initialize the chipset
+ */
+static int sktr_chipset_init(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ unsigned char PosReg, Tmp;
+ int i, err;
+
+ sktr_init_ipb(tp);
+ sktr_init_opb(tp);
+ sktr_init_net_local(dev);
+
+ /* Set pos register: selects irq and dma channel.
+ * Only for ISA bus adapters.
+ */
+ if(dev->dma > 0)
+ {
+ PosReg = 0;
+ for(i = 0; sktr_irqlist[i] != 0; i++)
+ {
+ if(sktr_irqlist[i] == dev->irq)
+ break;
+ }
+
+ /* Choose default cycle time, 500 nsec */
+ PosReg |= CYCLE_TIME << 2;
+ PosReg |= i << 4;
+ i = dev->dma - 5;
+ PosReg |= i;
+
+ if(tp->DataRate == SPEED_4)
+ PosReg |= LINE_SPEED_BIT;
+ else
+ PosReg &= ~LINE_SPEED_BIT;
+
+ outb(PosReg, dev->base_addr + POSREG);
+ Tmp = inb(dev->base_addr + POSREG);
+ if((Tmp & ~CYCLE_TIME) != (PosReg & ~CYCLE_TIME))
+ printk(KERN_INFO "%s: POSREG error\n", dev->name);
+ }
+
+ err = sktr_reset_adapter(dev);
+ if(err < 0)
+ return (-1);
+
+ err = sktr_bringup_diags(dev);
+ if(err < 0)
+ return (-1);
+
+ err = sktr_init_adapter(dev);
+ if(err < 0)
+ return (-1);
+
+ return (0);
+}
+
+/*
+ * Initializes the net_local structure.
+ */
+static void sktr_init_net_local(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ int i;
+
+ tp->scb.CMD = 0;
+ tp->scb.Parm[0] = 0;
+ tp->scb.Parm[1] = 0;
+
+ tp->ssb.STS = 0;
+ tp->ssb.Parm[0] = 0;
+ tp->ssb.Parm[1] = 0;
+ tp->ssb.Parm[2] = 0;
+
+ tp->CMDqueue = 0;
+
+ tp->AdapterOpenFlag = 0;
+ tp->AdapterVirtOpenFlag = 0;
+ tp->ScbInUse = 0;
+ tp->OpenCommandIssued = 0;
+ tp->ReOpenInProgress = 0;
+ tp->HaltInProgress = 0;
+ tp->TransmitHaltScheduled = 0;
+ tp->LobeWireFaultLogged = 0;
+ tp->LastOpenStatus = 0;
+ tp->MaxPacketSize = DEFAULT_PACKET_SIZE;
+
+ skb_queue_head_init(&tp->SendSkbQueue);
+ tp->QueueSkb = MAX_TX_QUEUE;
+
+ /* Create circular chain of transmit lists */
+ for (i = 0; i < TPL_NUM; i++)
+ {
+ tp->Tpl[i].NextTPLAddr = htonl((unsigned long) virt_to_bus(&tp->Tpl[(i+1) % TPL_NUM]));
+ tp->Tpl[i].Status = 0;
+ tp->Tpl[i].FrameSize = 0;
+ tp->Tpl[i].FragList[0].DataCount = 0;
+ tp->Tpl[i].FragList[0].DataAddr = 0;
+ tp->Tpl[i].NextTPLPtr = &tp->Tpl[(i+1) % TPL_NUM];
+ tp->Tpl[i].MData = NULL;
+ tp->Tpl[i].TPLIndex = i;
+ tp->Tpl[i].BusyFlag = 0;
+ }
+
+ tp->TplFree = tp->TplBusy = &tp->Tpl[0];
+
+ /* Create circular chain of receive lists */
+ for (i = 0; i < RPL_NUM; i++)
+ {
+ tp->Rpl[i].NextRPLAddr = htonl((unsigned long) virt_to_bus(&tp->Rpl[(i+1) % RPL_NUM]));
+ tp->Rpl[i].Status = (RX_VALID | RX_START_FRAME | RX_END_FRAME | RX_FRAME_IRQ);
+ tp->Rpl[i].FrameSize = 0;
+ tp->Rpl[i].FragList[0].DataCount = SWAPB(tp->MaxPacketSize);
+
+ /* Alloc skb and point adapter to data area */
+ tp->Rpl[i].Skb = dev_alloc_skb(tp->MaxPacketSize);
+
+ /* skb == NULL ? then use local buffer */
+ if(tp->Rpl[i].Skb == NULL)
+ {
+ tp->Rpl[i].SkbStat = SKB_UNAVAILABLE;
+ tp->Rpl[i].FragList[0].DataAddr = htonl(virt_to_bus(tp->LocalRxBuffers[i]));
+ tp->Rpl[i].MData = tp->LocalRxBuffers[i];
+ }
+ else /* SKB != NULL */
+ {
+ tp->Rpl[i].Skb->dev = dev;
+ skb_put(tp->Rpl[i].Skb, tp->MaxPacketSize);
+
+ /* data unreachable for DMA ? then use local buffer */
+ if(tp->DeviceType == SK_ISA &&
+ virt_to_bus(tp->Rpl[i].Skb->data) +
+ tp->MaxPacketSize > ISA_MAX_ADDRESS)
+ {
+ tp->Rpl[i].SkbStat = SKB_DATA_COPY;
+ tp->Rpl[i].FragList[0].DataAddr = htonl(virt_to_bus(tp->LocalRxBuffers[i]));
+ tp->Rpl[i].MData = tp->LocalRxBuffers[i];
+ }
+ else /* DMA directly in skb->data */
+ {
+ tp->Rpl[i].SkbStat = SKB_DMA_DIRECT;
+ tp->Rpl[i].FragList[0].DataAddr = htonl(virt_to_bus(tp->Rpl[i].Skb->data));
+ tp->Rpl[i].MData = tp->Rpl[i].Skb->data;
+ }
+ }
+
+ tp->Rpl[i].NextRPLPtr = &tp->Rpl[(i+1) % RPL_NUM];
+ tp->Rpl[i].RPLIndex = i;
+ }
+
+ tp->RplHead = &tp->Rpl[0];
+ tp->RplTail = &tp->Rpl[RPL_NUM-1];
+ tp->RplTail->Status = (RX_START_FRAME | RX_END_FRAME | RX_FRAME_IRQ);
+
+ return;
+}
+
+/*
+ * Initializes the initialisation parameter block.
+ */
+static void sktr_init_ipb(struct net_local *tp)
+{
+ tp->ipb.Init_Options = BURST_MODE;
+ tp->ipb.CMD_Status_IV = 0;
+ tp->ipb.TX_IV = 0;
+ tp->ipb.RX_IV = 0;
+ tp->ipb.Ring_Status_IV = 0;
+ tp->ipb.SCB_Clear_IV = 0;
+ tp->ipb.Adapter_CHK_IV = 0;
+ tp->ipb.RX_Burst_Size = BURST_SIZE;
+ tp->ipb.TX_Burst_Size = BURST_SIZE;
+ tp->ipb.DMA_Abort_Thrhld = DMA_RETRIES;
+ tp->ipb.SCB_Addr = 0;
+ tp->ipb.SSB_Addr = 0;
+
+ return;
+}
+
+/*
+ * Initializes the open parameter block.
+ */
+static void sktr_init_opb(struct net_local *tp)
+{
+ unsigned long Addr;
+ unsigned short RplSize = RPL_SIZE;
+ unsigned short TplSize = TPL_SIZE;
+ unsigned short BufferSize = BUFFER_SIZE;
+
+ tp->ocpl.OPENOptions = 0;
+ tp->ocpl.OPENOptions |= ENABLE_FULL_DUPLEX_SELECTION;
+/* tp->ocpl.OPENOptions |= PAD_ROUTING_FIELD; no more needed */
+ tp->ocpl.FullDuplex = 0;
+ tp->ocpl.FullDuplex |= OPEN_FULL_DUPLEX_OFF;
+
+ /* Fixme: If mac address setable:
+ * for (i=0; i<LENGTH_OF_ADDRESS; i++)
+ * mac->Vam->ocpl.NodeAddr[i] = mac->CurrentAddress[i];
+ */
+
+ tp->ocpl.GroupAddr = 0;
+ tp->ocpl.FunctAddr = 0;
+ tp->ocpl.RxListSize = SWAPB(RplSize);
+ tp->ocpl.TxListSize = SWAPB(TplSize);
+ tp->ocpl.BufSize = SWAPB(BufferSize);
+ tp->ocpl.Reserved = 0;
+ tp->ocpl.TXBufMin = TX_BUF_MIN;
+ tp->ocpl.TXBufMax = TX_BUF_MAX;
+
+ Addr = htonl(virt_to_bus(tp->ProductID));
+
+ tp->ocpl.ProdIDAddr[0] = LOWORD(Addr);
+ tp->ocpl.ProdIDAddr[1] = HIWORD(Addr);
+
+ return;
+}
+
+/*
+ * Send OPEN command to adapter
+ */
+static void sktr_open_adapter(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ if(tp->OpenCommandIssued)
+ return;
+
+ tp->OpenCommandIssued = 1;
+ sktr_exec_cmd(dev, OC_OPEN);
+
+ return;
+}
+
+/*
+ * Clear the adapter's interrupt flag. Clear system interrupt enable
+ * (SINTEN): disable adapter to system interrupts.
+ */
+static void sktr_disable_interrupts(struct net_device *dev)
+{
+ outb(0, dev->base_addr + SIFACL);
+
+ return;
+}
+
+/*
+ * Set the adapter's interrupt flag. Set system interrupt enable
+ * (SINTEN): enable adapter to system interrupts.
+ */
+static void sktr_enable_interrupts(struct net_device *dev)
+{
+ outb(ACL_SINTEN, dev->base_addr + SIFACL);
+
+ return;
+}
+
+/*
+ * Put command in command queue, try to execute it.
+ */
+static void sktr_exec_cmd(struct net_device *dev, unsigned short Command)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ tp->CMDqueue |= Command;
+ sktr_chk_outstanding_cmds(dev);
+
+ return;
+}
+
+/*
+ * Gets skb from system, queues it and checks if it can be sent
+ */
+static int sktr_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ if(dev->tbusy)
+ {
+ /*
+ * If we get here, some higher level has decided we are broken.
+ * There should really be a "kick me" function call instead.
+ *
+ * Resetting the token ring adapter takes a long time so just
+ * fake transmission time and go on trying. Our own timeout
+ * routine is in sktr_timer_chk()
+ */
+ dev->tbusy = 0;
+ dev->trans_start = jiffies;
+ return (1);
+ }
+
+ /*
+ * If some higher layer thinks we've missed an tx-done interrupt we
+ * are passed NULL.
+ */
+ if(skb == NULL)
+ return (0);
+
+ /*
+ * Block a timer-based transmit from overlapping. This could better be
+ * done with atomic_swap(1, dev->tbusy), but set_bit() works as well.
+ */
+ if(test_and_set_bit(0, (void*)&dev->tbusy) != 0)
+ {
+ printk("%s: Transmitter access conflict.\n", dev->name);
+ return (1);
+ }
+
+ if(tp->QueueSkb == 0)
+ return (1); /* Return with tbusy set: queue full */
+
+ tp->QueueSkb--;
+ skb_queue_tail(&tp->SendSkbQueue, skb);
+ sktr_hardware_send_packet(dev, tp);
+ if(tp->QueueSkb > 0)
+ dev->tbusy = 0;
+
+ return (0);
+}
+
+/*
+ * Move frames from internal skb queue into adapter tx queue
+ */
+static void sktr_hardware_send_packet(struct net_device *dev, struct net_local* tp)
+{
+ TPL *tpl;
+ short length;
+ unsigned char *buf, *newbuf;
+ struct sk_buff *skb;
+ int i;
+
+ for(;;)
+ {
+ /* Try to get a free TPL from the chain.
+ *
+ * NOTE: We *must* always leave one unused TPL in the chain,
+ * because otherwise the adapter might send frames twice.
+ */
+ if(tp->TplFree->NextTPLPtr->BusyFlag) /* No free TPL */
+ {
+ printk(KERN_INFO "%s: No free TPL\n", dev->name);
+ return;
+ }
+
+ /* Send first buffer from queue */
+ skb = skb_dequeue(&tp->SendSkbQueue);
+ if(skb == NULL)
+ return;
+
+ tp->QueueSkb++;
+ /* Is buffer reachable for Busmaster-DMA? */
+ if(tp->DeviceType == SK_ISA &&
+ virt_to_bus((void*)(((long) skb->data) + skb->len))
+ > ISA_MAX_ADDRESS)
+ {
+ /* Copy frame to local buffer */
+ i = tp->TplFree->TPLIndex;
+ length = skb->len;
+ buf = tp->LocalTxBuffers[i];
+ memcpy(buf, skb->data, length);
+ newbuf = buf;
+ }
+ else
+ {
+ /* Send direct from skb->data */
+ length = skb->len;
+ newbuf = skb->data;
+ }
+
+ /* Source address in packet? */
+ sktr_chk_src_addr(newbuf, dev->dev_addr);
+
+ tp->LastSendTime = jiffies;
+ tpl = tp->TplFree; /* Get the "free" TPL */
+ tpl->BusyFlag = 1; /* Mark TPL as busy */
+ tp->TplFree = tpl->NextTPLPtr;
+
+ /* Save the skb for delayed return of skb to system */
+ tpl->Skb = skb;
+ tpl->FragList[0].DataCount = (unsigned short) SWAPB(length);
+ tpl->FragList[0].DataAddr = htonl(virt_to_bus(newbuf));
+
+ /* Write the data length in the transmit list. */
+ tpl->FrameSize = (unsigned short) SWAPB(length);
+ tpl->MData = newbuf;
+
+ /* Transmit the frame and set the status values. */
+ sktr_write_tpl_status(tpl, TX_VALID | TX_START_FRAME
+ | TX_END_FRAME | TX_PASS_SRC_ADDR
+ | TX_FRAME_IRQ);
+
+ /* Let adapter send the frame. */
+ sktr_exec_sifcmd(dev, CMD_TX_VALID);
+ }
+
+ return;
+}
+
+/*
+ * Write the given value to the 'Status' field of the specified TPL.
+ * NOTE: This function should be used whenever the status of any TPL must be
+ * modified by the driver, because the compiler may otherwise change the
+ * order of instructions such that writing the TPL status may be executed at
+ * an undesireable time. When this function is used, the status is always
+ * written when the function is called.
+ */
+static void sktr_write_tpl_status(TPL *tpl, unsigned int Status)
+{
+ tpl->Status = Status;
+}
+
+static void sktr_chk_src_addr(unsigned char *frame, unsigned char *hw_addr)
+{
+ unsigned char SRBit;
+
+ if((((unsigned long)frame[8]) & ~0x80) != 0) /* Compare 4 bytes */
+ return;
+ if((unsigned short)frame[12] != 0) /* Compare 2 bytes */
+ return;
+
+ SRBit = frame[8] & 0x80;
+ memcpy(&frame[8], hw_addr, 6);
+ frame[8] |= SRBit;
+
+ return;
+}
+
+/*
+ * The timer routine: Check if adapter still open and working, reopen if not.
+ */
+static void sktr_timer_chk(unsigned long data)
+{
+ struct net_device *dev = (struct net_device*)data;
+ struct net_local *tp = (struct net_local*)dev->priv;
+
+ if(tp->HaltInProgress)
+ return;
+
+ sktr_chk_outstanding_cmds(dev);
+ if(time_before(tp->LastSendTime + SEND_TIMEOUT, jiffies)
+ && (tp->QueueSkb < MAX_TX_QUEUE || tp->TplFree != tp->TplBusy))
+ {
+ /* Anything to send, but stalled to long */
+ tp->LastSendTime = jiffies;
+ sktr_exec_cmd(dev, OC_CLOSE); /* Does reopen automatically */
+ }
+
+ tp->timer.expires = jiffies + 2*HZ;
+ add_timer(&tp->timer);
+
+ if(tp->AdapterOpenFlag || tp->ReOpenInProgress)
+ return;
+ tp->ReOpenInProgress = 1;
+ sktr_open_adapter(dev);
+
+ return;
+}
+
+/*
+ * The typical workload of the driver: Handle the network interface interrupts.
+ */
+static void sktr_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = dev_id;
+ struct net_local *tp;
+ int ioaddr;
+ unsigned short irq_type;
+
+ if(dev == NULL)
+ {
+ printk("%s: irq %d for unknown device.\n", dev->name, irq);
+ return;
+ }
+
+ dev->interrupt = 1;
+
+ ioaddr = dev->base_addr;
+ tp = (struct net_local *)dev->priv;
+
+ irq_type = inw(ioaddr + SIFSTS);
+
+ while(irq_type & STS_SYSTEM_IRQ)
+ {
+ irq_type &= STS_IRQ_MASK;
+
+ if(!sktr_chk_ssb(tp, irq_type))
+ {
+ printk(KERN_INFO "%s: DATA LATE occurred\n", dev->name);
+ break;
+ }
+
+ switch(irq_type)
+ {
+ case STS_IRQ_RECEIVE_STATUS:
+ sktr_reset_interrupt(dev);
+ sktr_rcv_status_irq(dev);
+ break;
+
+ case STS_IRQ_TRANSMIT_STATUS:
+ /* Check if TRANSMIT.HALT command is complete */
+ if(tp->ssb.Parm[0] & COMMAND_COMPLETE)
+ {
+ tp->TransmitCommandActive = 0;
+ tp->TransmitHaltScheduled = 0;
+
+ /* Issue a new transmit command. */
+ sktr_exec_cmd(dev, OC_TRANSMIT);
+ }
+
+ sktr_reset_interrupt(dev);
+ sktr_tx_status_irq(dev);
+ break;
+
+ case STS_IRQ_COMMAND_STATUS:
+ /* The SSB contains status of last command
+ * other than receive/transmit.
+ */
+ sktr_cmd_status_irq(dev);
+ break;
+
+ case STS_IRQ_SCB_CLEAR:
+ /* The SCB is free for another command. */
+ tp->ScbInUse = 0;
+ sktr_chk_outstanding_cmds(dev);
+ break;
+
+ case STS_IRQ_RING_STATUS:
+ sktr_ring_status_irq(dev);
+ break;
+
+ case STS_IRQ_ADAPTER_CHECK:
+ sktr_chk_irq(dev);
+ break;
+
+ default:
+ printk(KERN_INFO "Unknown Token Ring IRQ\n");
+ break;
+ }
+
+ /* Reset system interrupt if not already done. */
+ if(irq_type != STS_IRQ_TRANSMIT_STATUS
+ && irq_type != STS_IRQ_RECEIVE_STATUS)
+ {
+ sktr_reset_interrupt(dev);
+ }
+
+ irq_type = inw(ioaddr + SIFSTS);
+ }
+
+ dev->interrupt = 0;
+
+ return;
+}
+
+/*
+ * Reset the INTERRUPT SYSTEM bit and issue SSB CLEAR command.
+ */
+static void sktr_reset_interrupt(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ SSB *ssb = &tp->ssb;
+
+ /*
+ * [Workaround for "Data Late"]
+ * Set all fields of the SSB to well-defined values so we can
+ * check if the adapter has written the SSB.
+ */
+
+ ssb->STS = (unsigned short) -1;
+ ssb->Parm[0] = (unsigned short) -1;
+ ssb->Parm[1] = (unsigned short) -1;
+ ssb->Parm[2] = (unsigned short) -1;
+
+ /* Free SSB by issuing SSB_CLEAR command after reading IRQ code
+ * and clear STS_SYSTEM_IRQ bit: enable adapter for further interrupts.
+ */
+ sktr_exec_sifcmd(dev, CMD_SSB_CLEAR | CMD_CLEAR_SYSTEM_IRQ);
+
+ return;
+}
+
+/*
+ * Check if the SSB has actually been written by the adapter.
+ */
+static unsigned char sktr_chk_ssb(struct net_local *tp, unsigned short IrqType)
+{
+ SSB *ssb = &tp->ssb; /* The address of the SSB. */
+
+ /* C 0 1 2 INTERRUPT CODE
+ * - - - - --------------
+ * 1 1 1 1 TRANSMIT STATUS
+ * 1 1 1 1 RECEIVE STATUS
+ * 1 ? ? 0 COMMAND STATUS
+ * 0 0 0 0 SCB CLEAR
+ * 1 1 0 0 RING STATUS
+ * 0 0 0 0 ADAPTER CHECK
+ *
+ * 0 = SSB field not affected by interrupt
+ * 1 = SSB field is affected by interrupt
+ *
+ * C = SSB ADDRESS +0: COMMAND
+ * 0 = SSB ADDRESS +2: STATUS 0
+ * 1 = SSB ADDRESS +4: STATUS 1
+ * 2 = SSB ADDRESS +6: STATUS 2
+ */
+
+ /* Check if this interrupt does use the SSB. */
+
+ if(IrqType != STS_IRQ_TRANSMIT_STATUS
+ && IrqType != STS_IRQ_RECEIVE_STATUS
+ && IrqType != STS_IRQ_COMMAND_STATUS
+ && IrqType != STS_IRQ_RING_STATUS)
+ {
+ return (1); /* SSB not involved. */
+ }
+
+ /* Note: All fields of the SSB have been set to all ones (-1) after it
+ * has last been used by the software (see DriverIsr()).
+ *
+ * Check if the affected SSB fields are still unchanged.
+ */
+
+ if(ssb->STS == (unsigned short) -1)
+ return (0); /* Command field not yet available. */
+ if(IrqType == STS_IRQ_COMMAND_STATUS)
+ return (1); /* Status fields not always affected. */
+ if(ssb->Parm[0] == (unsigned short) -1)
+ return (0); /* Status 1 field not yet available. */
+ if(IrqType == STS_IRQ_RING_STATUS)
+ return (1); /* Status 2 & 3 fields not affected. */
+
+ /* Note: At this point, the interrupt is either TRANSMIT or RECEIVE. */
+ if(ssb->Parm[1] == (unsigned short) -1)
+ return (0); /* Status 2 field not yet available. */
+ if(ssb->Parm[2] == (unsigned short) -1)
+ return (0); /* Status 3 field not yet available. */
+
+ return (1); /* All SSB fields have been written by the adapter. */
+}
+
+/*
+ * Evaluates the command results status in the SSB status field.
+ */
+static void sktr_cmd_status_irq(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ unsigned short ssb_cmd, ssb_parm_0;
+ unsigned short ssb_parm_1;
+ char *open_err = "Open error -";
+ char *code_err = "Open code -";
+
+ /* Copy the ssb values to local variables */
+ ssb_cmd = tp->ssb.STS;
+ ssb_parm_0 = tp->ssb.Parm[0];
+ ssb_parm_1 = tp->ssb.Parm[1];
+
+ if(ssb_cmd == OPEN)
+ {
+ tp->Sleeping = 0;
+ if(!tp->ReOpenInProgress)
+ wake_up_interruptible(&tp->wait_for_tok_int);
+
+ tp->OpenCommandIssued = 0;
+ tp->ScbInUse = 0;
+
+ if((ssb_parm_0 & 0x00FF) == GOOD_COMPLETION)
+ {
+ /* Success, the adapter is open. */
+ tp->LobeWireFaultLogged = 0;
+ tp->AdapterOpenFlag = 1;
+ tp->AdapterVirtOpenFlag = 1;
+ tp->TransmitCommandActive = 0;
+ sktr_exec_cmd(dev, OC_TRANSMIT);
+ sktr_exec_cmd(dev, OC_RECEIVE);
+
+ if(tp->ReOpenInProgress)
+ tp->ReOpenInProgress = 0;
+
+ return;
+ }
+ else /* The adapter did not open. */
+ {
+ if(ssb_parm_0 & NODE_ADDR_ERROR)
+ printk(KERN_INFO "%s: Node address error\n",
+ dev->name);
+ if(ssb_parm_0 & LIST_SIZE_ERROR)
+ printk(KERN_INFO "%s: List size error\n",
+ dev->name);
+ if(ssb_parm_0 & BUF_SIZE_ERROR)
+ printk(KERN_INFO "%s: Buffer size error\n",
+ dev->name);
+ if(ssb_parm_0 & TX_BUF_COUNT_ERROR)
+ printk(KERN_INFO "%s: Tx buffer count error\n",
+ dev->name);
+ if(ssb_parm_0 & INVALID_OPEN_OPTION)
+ printk(KERN_INFO "%s: Invalid open option\n",
+ dev->name);
+ if(ssb_parm_0 & OPEN_ERROR)
+ {
+ /* Show the open phase. */
+ switch(ssb_parm_0 & OPEN_PHASES_MASK)
+ {
+ case LOBE_MEDIA_TEST:
+ if(!tp->LobeWireFaultLogged)
+ {
+ tp->LobeWireFaultLogged = 1;
+ printk(KERN_INFO "%s: %s Lobe wire fault (check cable !).\n", dev->name, open_err);
+ }
+ tp->ReOpenInProgress = 1;
+ tp->AdapterOpenFlag = 0;
+ tp->AdapterVirtOpenFlag = 1;
+ sktr_open_adapter(dev);
+ return;
+
+ case PHYSICAL_INSERTION:
+ printk(KERN_INFO "%s: %s Physical insertion.\n", dev->name, open_err);
+ break;
+
+ case ADDRESS_VERIFICATION:
+ printk(KERN_INFO "%s: %s Address verification.\n", dev->name, open_err);
+ break;
+
+ case PARTICIPATION_IN_RING_POLL:
+ printk(KERN_INFO "%s: %s Participation in ring poll.\n", dev->name, open_err);
+ break;
+
+ case REQUEST_INITIALISATION:
+ printk(KERN_INFO "%s: %s Request initialisation.\n", dev->name, open_err);
+ break;
+
+ case FULLDUPLEX_CHECK:
+ printk(KERN_INFO "%s: %s Full duplex check.\n", dev->name, open_err);
+ break;
+
+ default:
+ printk(KERN_INFO "%s: %s Unknown open phase\n", dev->name, open_err);
+ break;
+ }
+
+ /* Show the open errors. */
+ switch(ssb_parm_0 & OPEN_ERROR_CODES_MASK)
+ {
+ case OPEN_FUNCTION_FAILURE:
+ printk(KERN_INFO "%s: %s OPEN_FUNCTION_FAILURE", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_FUNCTION_FAILURE;
+ break;
+
+ case OPEN_SIGNAL_LOSS:
+ printk(KERN_INFO "%s: %s OPEN_SIGNAL_LOSS\n", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_SIGNAL_LOSS;
+ break;
+
+ case OPEN_TIMEOUT:
+ printk(KERN_INFO "%s: %s OPEN_TIMEOUT\n", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_TIMEOUT;
+ break;
+
+ case OPEN_RING_FAILURE:
+ printk(KERN_INFO "%s: %s OPEN_RING_FAILURE\n", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_RING_FAILURE;
+ break;
+
+ case OPEN_RING_BEACONING:
+ printk(KERN_INFO "%s: %s OPEN_RING_BEACONING\n", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_RING_BEACONING;
+ break;
+
+ case OPEN_DUPLICATE_NODEADDR:
+ printk(KERN_INFO "%s: %s OPEN_DUPLICATE_NODEADDR\n", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_DUPLICATE_NODEADDR;
+ break;
+
+ case OPEN_REQUEST_INIT:
+ printk(KERN_INFO "%s: %s OPEN_REQUEST_INIT\n", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_REQUEST_INIT;
+ break;
+
+ case OPEN_REMOVE_RECEIVED:
+ printk(KERN_INFO "%s: %s OPEN_REMOVE_RECEIVED", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_REMOVE_RECEIVED;
+ break;
+
+ case OPEN_FULLDUPLEX_SET:
+ printk(KERN_INFO "%s: %s OPEN_FULLDUPLEX_SET\n", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_FULLDUPLEX_SET;
+ break;
+
+ default:
+ printk(KERN_INFO "%s: %s Unknown open err code", dev->name, code_err);
+ tp->LastOpenStatus =
+ OPEN_FUNCTION_FAILURE;
+ break;
+ }
+ }
+
+ tp->AdapterOpenFlag = 0;
+ tp->AdapterVirtOpenFlag = 0;
+
+ return;
+ }
+ }
+ else
+ {
+ if(ssb_cmd != READ_ERROR_LOG)
+ return;
+
+ /* Add values from the error log table to the MAC
+ * statistics counters and update the errorlogtable
+ * memory.
+ */
+ tp->MacStat.line_errors += tp->errorlogtable.Line_Error;
+ tp->MacStat.burst_errors += tp->errorlogtable.Burst_Error;
+ tp->MacStat.A_C_errors += tp->errorlogtable.ARI_FCI_Error;
+ tp->MacStat.lost_frames += tp->errorlogtable.Lost_Frame_Error;
+ tp->MacStat.recv_congest_count += tp->errorlogtable.Rx_Congest_Error;
+ tp->MacStat.rx_errors += tp->errorlogtable.Rx_Congest_Error;
+ tp->MacStat.frame_copied_errors += tp->errorlogtable.Frame_Copied_Error;
+ tp->MacStat.token_errors += tp->errorlogtable.Token_Error;
+ tp->MacStat.dummy1 += tp->errorlogtable.DMA_Bus_Error;
+ tp->MacStat.dummy1 += tp->errorlogtable.DMA_Parity_Error;
+ tp->MacStat.abort_delimiters += tp->errorlogtable.AbortDelimeters;
+ tp->MacStat.frequency_errors += tp->errorlogtable.Frequency_Error;
+ tp->MacStat.internal_errors += tp->errorlogtable.Internal_Error;
+ }
+
+ return;
+}
+
+/*
+ * The inverse routine to sktr_open().
+ */
+static int sktr_close(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ dev->tbusy = 1;
+ dev->start = 0;
+
+ del_timer(&tp->timer);
+
+ /* Flush the Tx and disable Rx here. */
+
+ tp->HaltInProgress = 1;
+ sktr_exec_cmd(dev, OC_CLOSE);
+ tp->timer.expires = jiffies + 1*HZ;
+ tp->timer.function = sktr_timer_end_wait;
+ tp->timer.data = (unsigned long)dev;
+ add_timer(&tp->timer);
+
+ sktr_enable_interrupts(dev);
+
+ tp->Sleeping = 1;
+ interruptible_sleep_on(&tp->wait_for_tok_int);
+ tp->TransmitCommandActive = 0;
+
+ del_timer(&tp->timer);
+ sktr_disable_interrupts(dev);
+
+ if(dev->dma > 0)
+ {
+ unsigned long flags=claim_dma_lock();
+ disable_dma(dev->dma);
+ release_dma_lock(flags);
+ }
+
+ outw(0xFF00, dev->base_addr + SIFCMD);
+ if(dev->dma > 0)
+ outb(0xff, dev->base_addr + POSREG);
+
+#ifdef MODULE
+ MOD_DEC_USE_COUNT;
+#endif
+
+ sktr_cancel_tx_queue(tp);
+
+ return (0);
+}
+
+/*
+ * Get the current statistics. This may be called with the card open
+ * or closed.
+ */
+static struct enet_statistics *sktr_get_stats(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ return ((struct enet_statistics *)&tp->MacStat);
+}
+
+/*
+ * Set or clear the multicast filter for this adapter.
+ */
+static void sktr_set_multicast_list(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ unsigned int OpenOptions;
+
+ OpenOptions = tp->ocpl.OPENOptions &
+ ~(PASS_ADAPTER_MAC_FRAMES
+ | PASS_ATTENTION_FRAMES
+ | PASS_BEACON_MAC_FRAMES
+ | COPY_ALL_MAC_FRAMES
+ | COPY_ALL_NON_MAC_FRAMES);
+
+ tp->ocpl.FunctAddr = 0;
+
+ if(dev->flags & IFF_PROMISC)
+ /* Enable promiscuous mode */
+ OpenOptions |= COPY_ALL_NON_MAC_FRAMES |
+ COPY_ALL_MAC_FRAMES;
+ else
+ {
+ if(dev->flags & IFF_ALLMULTI)
+ {
+ /* Disable promiscuous mode, use normal mode. */
+ tp->ocpl.FunctAddr = 0xFFFFFFFF;
+
+ }
+ else
+ {
+ int i;
+ struct dev_mc_list *mclist = dev->mc_list;
+ for (i=0; i< dev->mc_count; i++)
+ {
+ ((char *)(&tp->ocpl.FunctAddr))[0] |=
+ mclist->dmi_addr[2];
+ ((char *)(&tp->ocpl.FunctAddr))[1] |=
+ mclist->dmi_addr[3];
+ ((char *)(&tp->ocpl.FunctAddr))[2] |=
+ mclist->dmi_addr[4];
+ ((char *)(&tp->ocpl.FunctAddr))[3] |=
+ mclist->dmi_addr[5];
+ mclist = mclist->next;
+ }
+ }
+ sktr_exec_cmd(dev, OC_SET_FUNCT_ADDR);
+ }
+
+ tp->ocpl.OPENOptions = OpenOptions;
+ sktr_exec_cmd(dev, OC_MODIFY_OPEN_PARMS);
+ return;
+}
+
+/*
+ * Wait for some time (microseconds)
+ *
+ * udelay() is a bit harsh, but using a looser timer causes
+ * the bring-up-diags to stall indefinitly.
+ *
+ */
+
+static void sktr_wait(unsigned long time)
+{
+ udelay(time);
+ return;
+}
+
+/*
+ * Write a command value to the SIFCMD register
+ */
+static void sktr_exec_sifcmd(struct net_device *dev, unsigned int WriteValue)
+{
+ int ioaddr = dev->base_addr;
+ unsigned short cmd;
+ unsigned short SifStsValue;
+ unsigned long loop_counter;
+
+ WriteValue = ((WriteValue ^ CMD_SYSTEM_IRQ) | CMD_INTERRUPT_ADAPTER);
+ cmd = (unsigned short)WriteValue;
+ loop_counter = 0,5 * 800000;
+ do {
+ SifStsValue = inw(ioaddr + SIFSTS);
+ } while((SifStsValue & CMD_INTERRUPT_ADAPTER) && loop_counter--);
+ outw(cmd, ioaddr + SIFCMD);
+
+ return;
+}
+
+/*
+ * Processes adapter hardware reset, halts adapter and downloads firmware,
+ * clears the halt bit.
+ */
+static int sktr_reset_adapter(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ unsigned short *fw_ptr = (unsigned short *)&sktr_code;
+ unsigned short count, c;
+ int ioaddr = dev->base_addr;
+
+ /* Hardware adapter reset */
+ outw(ACL_ARESET, ioaddr + SIFACL);
+ sktr_wait(40);
+
+ c = inw(ioaddr + SIFACL);
+ sktr_wait(20);
+
+ if(dev->dma == 0) /* For PCI adapters */
+ {
+ c &= ~(ACL_SPEED4 | ACL_SPEED16); /* Clear bits */
+ if(tp->DataRate == SPEED_4)
+ c |= ACL_SPEED4; /* Set 4Mbps */
+ else
+ c |= ACL_SPEED16; /* Set 16Mbps */
+ }
+
+ /* In case a command is pending - forget it */
+ tp->ScbInUse = 0;
+
+ c &= ~ACL_ARESET; /* Clear adapter reset bit */
+ c |= ACL_CPHALT; /* Halt adapter CPU, allow download */
+ c &= ~ACL_PSDMAEN; /* Clear pseudo dma bit */
+ outw(c, ioaddr + SIFACL);
+ sktr_wait(40);
+
+ /* Download firmware via DIO interface: */
+ do {
+ /* Download first address part */
+ outw(*fw_ptr, ioaddr + SIFADX);
+ fw_ptr++;
+
+ /* Download second address part */
+ outw(*fw_ptr, ioaddr + SIFADD);
+ fw_ptr++;
+
+ if((count = *fw_ptr) != 0) /* Load loop counter */
+ {
+ fw_ptr++; /* Download block data */
+ for(; count > 0; count--)
+ {
+ outw(*fw_ptr, ioaddr + SIFINC);
+ fw_ptr++;
+ }
+ }
+ else /* Stop, if last block downloaded */
+ {
+ c = inw(ioaddr + SIFACL);
+ c &= (~ACL_CPHALT | ACL_SINTEN);
+
+ /* Clear CPHALT and start BUD */
+ outw(c, ioaddr + SIFACL);
+ return (1);
+ }
+ } while(count == 0);
+
+ return (-1);
+}
+
+/*
+ * Starts bring up diagnostics of token ring adapter and evaluates
+ * diagnostic results.
+ */
+static int sktr_bringup_diags(struct net_device *dev)
+{
+ int loop_cnt, retry_cnt;
+ unsigned short Status;
+ int ioaddr = dev->base_addr;
+
+ sktr_wait(HALF_SECOND);
+ sktr_exec_sifcmd(dev, EXEC_SOFT_RESET);
+ sktr_wait(HALF_SECOND);
+
+ retry_cnt = BUD_MAX_RETRIES; /* maximal number of retrys */
+
+ do {
+ retry_cnt--;
+ if(sktr_debug > 3)
+ printk(KERN_INFO "BUD-Status: \n");
+ loop_cnt = BUD_MAX_LOOPCNT; /* maximum: three seconds*/
+ do { /* Inspect BUD results */
+ loop_cnt--;
+ sktr_wait(HALF_SECOND);
+ Status = inw(ioaddr + SIFSTS);
+ Status &= STS_MASK;
+
+ if(sktr_debug > 3)
+ printk(KERN_INFO " %04X \n", Status);
+ /* BUD successfully completed */
+ if(Status == STS_INITIALIZE)
+ return (1);
+ /* Unrecoverable hardware error, BUD not completed? */
+ } while((loop_cnt > 0) && ((Status & (STS_ERROR | STS_TEST))
+ != (STS_ERROR | STS_TEST)));
+
+ /* Error preventing completion of BUD */
+ if(retry_cnt > 0)
+ {
+ printk(KERN_INFO "%s: Adapter Software Reset.\n",
+ dev->name);
+ sktr_exec_sifcmd(dev, EXEC_SOFT_RESET);
+ sktr_wait(HALF_SECOND);
+ }
+ } while(retry_cnt > 0);
+
+ Status = inw(ioaddr + SIFSTS);
+ Status &= STS_ERROR_MASK; /* Hardware error occurred! */
+
+ printk(KERN_INFO "%s: Bring Up Diagnostics Error (%04X) occurred\n",
+ dev->name, Status);
+
+ return (-1);
+}
+
+/*
+ * Copy initialisation data to adapter memory, beginning at address
+ * 1:0A00; Starting DMA test and evaluating result bits.
+ */
+static int sktr_init_adapter(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ const unsigned char SCB_Test[6] = {0x00, 0x00, 0xC1, 0xE2, 0xD4, 0x8B};
+ const unsigned char SSB_Test[8] = {0xFF, 0xFF, 0xD1, 0xD7,
+ 0xC5, 0xD9, 0xC3, 0xD4};
+ void *ptr = (void *)&tp->ipb;
+ unsigned short *ipb_ptr = (unsigned short *)ptr;
+ unsigned char *cb_ptr = (unsigned char *) &tp->scb;
+ unsigned char *sb_ptr = (unsigned char *) &tp->ssb;
+ unsigned short Status;
+ int i, loop_cnt, retry_cnt;
+ int ioaddr = dev->base_addr;
+
+ /* Normalize: byte order low/high, word order high/low! (only IPB!) */
+ tp->ipb.SCB_Addr = SWAPW(virt_to_bus(&tp->scb));
+ tp->ipb.SSB_Addr = SWAPW(virt_to_bus(&tp->ssb));
+
+ /* Maximum: three initialization retries */
+ retry_cnt = INIT_MAX_RETRIES;
+
+ do {
+ retry_cnt--;
+
+ /* Transfer initialization block */
+ outw(0x0001, ioaddr + SIFADX);
+
+ /* To address 0001:0A00 of adapter RAM */
+ outw(0x0A00, ioaddr + SIFADD);
+
+ /* Write 11 words to adapter RAM */
+ for(i = 0; i < 11; i++)
+ outw(ipb_ptr[i], ioaddr + SIFINC);
+
+ /* Execute SCB adapter command */
+ sktr_exec_sifcmd(dev, CMD_EXECUTE);
+
+ loop_cnt = INIT_MAX_LOOPCNT; /* Maximum: 11 seconds */
+
+ /* While remaining retries, no error and not completed */
+ do {
+ Status = 0;
+ loop_cnt--;
+ sktr_wait(HALF_SECOND);
+
+ /* Mask interesting status bits */
+ Status = inw(ioaddr + SIFSTS);
+ Status &= STS_MASK;
+ } while(((Status &(STS_INITIALIZE | STS_ERROR | STS_TEST)) != 0)
+ && ((Status & STS_ERROR) == 0) && (loop_cnt != 0));
+
+ if((Status & (STS_INITIALIZE | STS_ERROR | STS_TEST)) == 0)
+ {
+ /* Initialization completed without error */
+ i = 0;
+ do { /* Test if contents of SCB is valid */
+ if(SCB_Test[i] != *(cb_ptr + i))
+ /* DMA data error: wrong data in SCB */
+ return (-1);
+ i++;
+ } while(i < 6);
+
+ i = 0;
+ do { /* Test if contents of SSB is valid */
+ if(SSB_Test[i] != *(sb_ptr + i))
+ /* DMA data error: wrong data in SSB */
+ return (-1);
+ i++;
+ } while (i < 8);
+
+ return (1); /* Adapter successfully initialized */
+ }
+ else
+ {
+ if((Status & STS_ERROR) != 0)
+ {
+ /* Initialization error occurred */
+ Status = inw(ioaddr + SIFSTS);
+ Status &= STS_ERROR_MASK;
+ /* ShowInitialisationErrorCode(Status); */
+ return (-1); /* Unrecoverable error */
+ }
+ else
+ {
+ if(retry_cnt > 0)
+ {
+ /* Reset adapter and try init again */
+ sktr_exec_sifcmd(dev, EXEC_SOFT_RESET);
+ sktr_wait(HALF_SECOND);
+ }
+ }
+ }
+ } while(retry_cnt > 0);
+
+ return (-1);
+}
+
+/*
+ * Check for outstanding commands in command queue and tries to execute
+ * command immediately. Corresponding command flag in command queue is cleared.
+ */
+static void sktr_chk_outstanding_cmds(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ unsigned long Addr = 0;
+ unsigned char i = 0;
+
+ if(tp->CMDqueue == 0)
+ return; /* No command execution */
+
+ /* If SCB in use: no command */
+ if(tp->ScbInUse == 1)
+ return;
+
+ /* Check if adapter is opened, avoiding COMMAND_REJECT
+ * interrupt by the adapter!
+ */
+ if(tp->AdapterOpenFlag == 0)
+ {
+ if(tp->CMDqueue & OC_OPEN)
+ {
+ /* Execute OPEN command */
+ tp->CMDqueue ^= OC_OPEN;
+
+ /* Copy the 18 bytes of the product ID */
+ while((AdapterName[i] != '\0') && (i < PROD_ID_SIZE))
+ {
+ tp->ProductID[i] = AdapterName[i];
+ i++;
+ }
+
+ Addr = htonl(virt_to_bus(&tp->ocpl));
+ tp->scb.Parm[0] = LOWORD(Addr);
+ tp->scb.Parm[1] = HIWORD(Addr);
+ tp->scb.CMD = OPEN;
+ }
+ else
+ /* No OPEN command queued, but adapter closed. Note:
+ * We'll try to re-open the adapter in DriverPoll()
+ */
+ return; /* No adapter command issued */
+ }
+ else
+ {
+ /* Adapter is open; evaluate command queue: try to execute
+ * outstanding commands (depending on priority!) CLOSE
+ * command queued
+ */
+ if(tp->CMDqueue & OC_CLOSE)
+ {
+ tp->CMDqueue ^= OC_CLOSE;
+ tp->AdapterOpenFlag = 0;
+ tp->scb.Parm[0] = 0; /* Parm[0], Parm[1] are ignored */
+ tp->scb.Parm[1] = 0; /* but should be set to zero! */
+ tp->scb.CMD = CLOSE;
+ if(!tp->HaltInProgress)
+ tp->CMDqueue |= OC_OPEN; /* re-open adapter */
+ else
+ tp->CMDqueue = 0; /* no more commands */
+ }
+ else
+ {
+ if(tp->CMDqueue & OC_RECEIVE)
+ {
+ tp->CMDqueue ^= OC_RECEIVE;
+ Addr = htonl(virt_to_bus(tp->RplHead));
+ tp->scb.Parm[0] = LOWORD(Addr);
+ tp->scb.Parm[1] = HIWORD(Addr);
+ tp->scb.CMD = RECEIVE;
+ }
+ else
+ {
+ if(tp->CMDqueue & OC_TRANSMIT_HALT)
+ {
+ /* NOTE: TRANSMIT.HALT must be checked
+ * before TRANSMIT.
+ */
+ tp->CMDqueue ^= OC_TRANSMIT_HALT;
+ tp->scb.CMD = TRANSMIT_HALT;
+
+ /* Parm[0] and Parm[1] are ignored
+ * but should be set to zero!
+ */
+ tp->scb.Parm[0] = 0;
+ tp->scb.Parm[1] = 0;
+ }
+ else
+ {
+ if(tp->CMDqueue & OC_TRANSMIT)
+ {
+ /* NOTE: TRANSMIT must be
+ * checked after TRANSMIT.HALT
+ */
+ if(tp->TransmitCommandActive)
+ {
+ if(!tp->TransmitHaltScheduled)
+ {
+ tp->TransmitHaltScheduled = 1;
+ sktr_exec_cmd(dev, OC_TRANSMIT_HALT) ;
+ }
+ tp->TransmitCommandActive = 0;
+ return;
+ }
+
+ tp->CMDqueue ^= OC_TRANSMIT;
+ sktr_cancel_tx_queue(tp);
+ Addr = htonl(virt_to_bus(tp->TplBusy));
+ tp->scb.Parm[0] = LOWORD(Addr);
+ tp->scb.Parm[1] = HIWORD(Addr);
+ tp->scb.CMD = TRANSMIT;
+ tp->TransmitCommandActive = 1;
+ }
+ else
+ {
+ if(tp->CMDqueue & OC_MODIFY_OPEN_PARMS)
+ {
+ tp->CMDqueue ^= OC_MODIFY_OPEN_PARMS;
+ tp->scb.Parm[0] = tp->ocpl.OPENOptions; /* new OPEN options*/
+ tp->scb.Parm[0] |= ENABLE_FULL_DUPLEX_SELECTION;
+ tp->scb.Parm[1] = 0; /* is ignored but should be zero */
+ tp->scb.CMD = MODIFY_OPEN_PARMS;
+ }
+ else
+ {
+ if(tp->CMDqueue & OC_SET_FUNCT_ADDR)
+ {
+ tp->CMDqueue ^= OC_SET_FUNCT_ADDR;
+ tp->scb.Parm[0] = LOWORD(tp->ocpl.FunctAddr);
+ tp->scb.Parm[1] = HIWORD(tp->ocpl.FunctAddr);
+ tp->scb.CMD = SET_FUNCT_ADDR;
+ }
+ else
+ {
+ if(tp->CMDqueue & OC_SET_GROUP_ADDR)
+ {
+ tp->CMDqueue ^= OC_SET_GROUP_ADDR;
+ tp->scb.Parm[0] = LOWORD(tp->ocpl.GroupAddr);
+ tp->scb.Parm[1] = HIWORD(tp->ocpl.GroupAddr);
+ tp->scb.CMD = SET_GROUP_ADDR;
+ }
+ else
+ {
+ if(tp->CMDqueue & OC_READ_ERROR_LOG)
+ {
+ tp->CMDqueue ^= OC_READ_ERROR_LOG;
+ Addr = htonl(virt_to_bus(&tp->errorlogtable));
+ tp->scb.Parm[0] = LOWORD(Addr);
+ tp->scb.Parm[1] = HIWORD(Addr);
+ tp->scb.CMD = READ_ERROR_LOG;
+ }
+ else
+ {
+ printk(KERN_WARNING "CheckForOutstandingCommand: unknown Command\n");
+ tp->CMDqueue = 0;
+ return;
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ tp->ScbInUse = 1; /* Set semaphore: SCB in use. */
+
+ /* Execute SCB and generate IRQ when done. */
+ sktr_exec_sifcmd(dev, CMD_EXECUTE | CMD_SCB_REQUEST);
+
+ return;
+}
+
+/*
+ * IRQ conditions: signal loss on the ring, transmit or receive of beacon
+ * frames (disabled if bit 1 of OPEN option is set); report error MAC
+ * frame transmit (disabled if bit 2 of OPEN option is set); open or short
+ * cirquit fault on the lobe is detected; remove MAC frame received;
+ * error counter overflow (255); opened adapter is the only station in ring.
+ * After some of the IRQs the adapter is closed!
+ */
+static void sktr_ring_status_irq(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ tp->CurrentRingStatus = SWAPB(tp->ssb.Parm[0]);
+
+ /* First: fill up statistics */
+ if(tp->ssb.Parm[0] & SIGNAL_LOSS)
+ {
+ printk(KERN_INFO "%s: Signal Loss\n", dev->name);
+ tp->MacStat.line_errors++;
+ }
+
+ /* Adapter is closed, but initialized */
+ if(tp->ssb.Parm[0] & LOBE_WIRE_FAULT)
+ {
+ printk(KERN_INFO "%s: Lobe Wire Fault, Reopen Adapter\n",
+ dev->name);
+ tp->MacStat.line_errors++;
+ }
+
+ if(tp->ssb.Parm[0] & RING_RECOVERY)
+ printk(KERN_INFO "%s: Ring Recovery\n", dev->name);
+
+ /* Counter overflow: read error log */
+ if(tp->ssb.Parm[0] & COUNTER_OVERFLOW)
+ {
+ printk(KERN_INFO "%s: Counter Overflow\n", dev->name);
+ sktr_exec_cmd(dev, OC_READ_ERROR_LOG);
+ }
+
+ /* Adapter is closed, but initialized */
+ if(tp->ssb.Parm[0] & REMOVE_RECEIVED)
+ printk(KERN_INFO "%s: Remove Received, Reopen Adapter\n",
+ dev->name);
+
+ /* Adapter is closed, but initialized */
+ if(tp->ssb.Parm[0] & AUTO_REMOVAL_ERROR)
+ printk(KERN_INFO "%s: Auto Removal Error, Reopen Adapter\n",
+ dev->name);
+
+ if(tp->ssb.Parm[0] & HARD_ERROR)
+ printk(KERN_INFO "%s: Hard Error\n", dev->name);
+
+ if(tp->ssb.Parm[0] & SOFT_ERROR)
+ printk(KERN_INFO "%s: Soft Error\n", dev->name);
+
+ if(tp->ssb.Parm[0] & TRANSMIT_BEACON)
+ printk(KERN_INFO "%s: Transmit Beacon\n", dev->name);
+
+ if(tp->ssb.Parm[0] & SINGLE_STATION)
+ printk(KERN_INFO "%s: Single Station\n", dev->name);
+
+ /* Check if adapter has been closed */
+ if(tp->ssb.Parm[0] & ADAPTER_CLOSED)
+ {
+ printk(KERN_INFO "%s: Adapter closed (Reopening),"
+ "QueueSkb %d, CurrentRingStat %x\n",
+ dev->name, tp->QueueSkb, tp->CurrentRingStatus);
+ tp->AdapterOpenFlag = 0;
+ sktr_open_adapter(dev);
+ }
+
+ return;
+}
+
+/*
+ * Issued if adapter has encountered an unrecoverable hardware
+ * or software error.
+ */
+static void sktr_chk_irq(struct net_device *dev)
+{
+ int i;
+ unsigned short AdapterCheckBlock[4];
+ unsigned short ioaddr = dev->base_addr;
+ struct net_local *tp = (struct net_local *)dev->priv;
+
+ tp->AdapterOpenFlag = 0; /* Adapter closed now */
+
+ /* Page number of adapter memory */
+ outw(0x0001, ioaddr + SIFADX);
+ /* Address offset */
+ outw(CHECKADDR, ioaddr + SIFADR);
+
+ /* Reading 8 byte adapter check block. */
+ for(i = 0; i < 4; i++)
+ AdapterCheckBlock[i] = inw(ioaddr + SIFINC);
+
+ if(sktr_debug > 3)
+ {
+ printk("%s: AdapterCheckBlock: ", dev->name);
+ for (i = 0; i < 4; i++)
+ printk("%04X", AdapterCheckBlock[i]);
+ printk("\n");
+ }
+
+ switch(AdapterCheckBlock[0])
+ {
+ case DIO_PARITY:
+ printk(KERN_INFO "%s: DIO parity error\n", dev->name);
+ break;
+
+ case DMA_READ_ABORT:
+ printk(KERN_INFO "%s DMA read operation aborted:\n",
+ dev->name);
+ switch (AdapterCheckBlock[1])
+ {
+ case 0:
+ printk(KERN_INFO "Timeout\n");
+ printk(KERN_INFO "Address: %04X %04X\n",
+ AdapterCheckBlock[2],
+ AdapterCheckBlock[3]);
+ break;
+
+ case 1:
+ printk(KERN_INFO "Parity error\n");
+ printk(KERN_INFO "Address: %04X %04X\n",
+ AdapterCheckBlock[2],
+ AdapterCheckBlock[3]);
+ break;
+
+ case 2:
+ printk(KERN_INFO "Bus error\n");
+ printk(KERN_INFO "Address: %04X %04X\n",
+ AdapterCheckBlock[2],
+ AdapterCheckBlock[3]);
+ break;
+
+ default:
+ printk(KERN_INFO "Unknown error.\n");
+ break;
+ }
+ break;
+
+ case DMA_WRITE_ABORT:
+ printk(KERN_INFO "%s: DMA write operation aborted: \n",
+ dev->name);
+ switch (AdapterCheckBlock[1])
+ {
+ case 0:
+ printk(KERN_INFO "Timeout\n");
+ printk(KERN_INFO "Address: %04X %04X\n",
+ AdapterCheckBlock[2],
+ AdapterCheckBlock[3]);
+ break;
+
+ case 1:
+ printk(KERN_INFO "Parity error\n");
+ printk(KERN_INFO "Address: %04X %04X\n",
+ AdapterCheckBlock[2],
+ AdapterCheckBlock[3]);
+ break;
+
+ case 2:
+ printk(KERN_INFO "Bus error\n");
+ printk(KERN_INFO "Address: %04X %04X\n",
+ AdapterCheckBlock[2],
+ AdapterCheckBlock[3]);
+ break;
+
+ default:
+ printk(KERN_INFO "Unknown error.\n");
+ break;
+ }
+ break;
+
+ case ILLEGAL_OP_CODE:
+ printk("%s: Illegal operation code in firmware\n",
+ dev->name);
+ /* Parm[0-3]: adapter internal register R13-R15 */
+ break;
+
+ case PARITY_ERRORS:
+ printk("%s: Adapter internal bus parity error\n",
+ dev->name);
+ /* Parm[0-3]: adapter internal register R13-R15 */
+ break;
+
+ case RAM_DATA_ERROR:
+ printk("%s: RAM data error\n", dev->name);
+ /* Parm[0-1]: MSW/LSW address of RAM location. */
+ break;
+
+ case RAM_PARITY_ERROR:
+ printk("%s: RAM parity error\n", dev->name);
+ /* Parm[0-1]: MSW/LSW address of RAM location. */
+ break;
+
+ case RING_UNDERRUN:
+ printk("%s: Internal DMA underrun detected\n",
+ dev->name);
+ break;
+
+ case INVALID_IRQ:
+ printk("%s: Unrecognized interrupt detected\n",
+ dev->name);
+ /* Parm[0-3]: adapter internal register R13-R15 */
+ break;
+
+ case INVALID_ERROR_IRQ:
+ printk("%s: Unrecognized error interrupt detected\n",
+ dev->name);
+ /* Parm[0-3]: adapter internal register R13-R15 */
+ break;
+
+ case INVALID_XOP:
+ printk("%s: Unrecognized XOP request detected\n",
+ dev->name);
+ /* Parm[0-3]: adapter internal register R13-R15 */
+ break;
+
+ default:
+ printk("%s: Unknown status", dev->name);
+ break;
+ }
+
+ if(sktr_chipset_init(dev) == 1)
+ {
+ /* Restart of firmware successful */
+ tp->AdapterOpenFlag = 1;
+ }
+
+ return;
+}
+
+/*
+ * Internal adapter pointer to RAM data are copied from adapter into
+ * host system.
+ */
+static void sktr_read_ptr(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ unsigned short adapterram;
+
+ sktr_read_ram(dev, (unsigned char *)&tp->intptrs.BurnedInAddrPtr,
+ ADAPTER_INT_PTRS, 16);
+ sktr_read_ram(dev, (unsigned char *)&adapterram,
+ (unsigned short)SWAPB(tp->intptrs.AdapterRAMPtr), 2);
+
+ printk(KERN_INFO "%s: Adapter RAM size: %d K\n",
+ dev->name, SWAPB(adapterram));
+
+ return;
+}
+
+/*
+ * Reads a number of bytes from adapter to system memory.
+ */
+static void sktr_read_ram(struct net_device *dev, unsigned char *Data,
+ unsigned short Address, int Length)
+{
+ int i;
+ unsigned short old_sifadx, old_sifadr, InWord;
+ unsigned short ioaddr = dev->base_addr;
+
+ /* Save the current values */
+ old_sifadx = inw(ioaddr + SIFADX);
+ old_sifadr = inw(ioaddr + SIFADR);
+
+ /* Page number of adapter memory */
+ outw(0x0001, ioaddr + SIFADX);
+ /* Address offset in adapter RAM */
+ outw(Address, ioaddr + SIFADR);
+
+ /* Copy len byte from adapter memory to system data area. */
+ i = 0;
+ for(;;)
+ {
+ InWord = inw(ioaddr + SIFINC);
+
+ *(Data + i) = HIBYTE(InWord); /* Write first byte */
+ if(++i == Length) /* All is done break */
+ break;
+
+ *(Data + i) = LOBYTE(InWord); /* Write second byte */
+ if (++i == Length) /* All is done break */
+ break;
+ }
+
+ /* Restore original values */
+ outw(old_sifadx, ioaddr + SIFADX);
+ outw(old_sifadr, ioaddr + SIFADR);
+
+ return;
+}
+
+/*
+ * Reads MAC address from adapter ROM.
+ */
+static void sktr_read_addr(struct net_device *dev, unsigned char *Address)
+{
+ int i, In;
+ unsigned short ioaddr = dev->base_addr;
+
+ /* Address: 0000:0000 */
+ outw(0, ioaddr + SIFADX);
+ outw(0, ioaddr + SIFADR);
+
+ /* Read six byte MAC address data */
+ for(i = 0; i < 6; i++)
+ {
+ In = inw(ioaddr + SIFINC);
+ *(Address + i) = (unsigned char)(In >> 8);
+ }
+
+ return;
+}
+
+/*
+ * Cancel all queued packets in the transmission queue.
+ */
+static void sktr_cancel_tx_queue(struct net_local* tp)
+{
+ TPL *tpl;
+ struct sk_buff *skb;
+
+ /*
+ * NOTE: There must not be an active TRANSMIT command pending, when
+ * this function is called.
+ */
+ if(tp->TransmitCommandActive)
+ return;
+
+ for(;;)
+ {
+ tpl = tp->TplBusy;
+ if(!tpl->BusyFlag)
+ break;
+ /* "Remove" TPL from busy list. */
+ tp->TplBusy = tpl->NextTPLPtr;
+ sktr_write_tpl_status(tpl, 0); /* Clear VALID bit */
+ tpl->BusyFlag = 0; /* "free" TPL */
+
+ printk(KERN_INFO "Cancel tx (%08lXh).\n", (unsigned long)tpl);
+
+ dev_kfree_skb(tpl->Skb);
+ }
+
+ for(;;)
+ {
+ skb = skb_dequeue(&tp->SendSkbQueue);
+ if(skb == NULL)
+ break;
+ tp->QueueSkb++;
+ dev_kfree_skb(skb);
+ }
+
+ return;
+}
+
+/*
+ * This function is called whenever a transmit interrupt is generated by the
+ * adapter. For a command complete interrupt, it is checked if we have to
+ * issue a new transmit command or not.
+ */
+static void sktr_tx_status_irq(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ unsigned char HighByte, HighAc, LowAc;
+ TPL *tpl;
+
+ /* NOTE: At this point the SSB from TRANSMIT STATUS is no longer
+ * available, because the CLEAR SSB command has already been issued.
+ *
+ * Process all complete transmissions.
+ */
+
+ for(;;)
+ {
+ tpl = tp->TplBusy;
+ if(!tpl->BusyFlag || (tpl->Status
+ & (TX_VALID | TX_FRAME_COMPLETE))
+ != TX_FRAME_COMPLETE)
+ {
+ break;
+ }
+
+ /* "Remove" TPL from busy list. */
+ tp->TplBusy = tpl->NextTPLPtr ;
+
+ if(sktr_debug > 3)
+ sktr_dump(tpl->MData, SWAPB(tpl->FrameSize));
+
+ /* Check the transmit status field only for directed frames*/
+ if(DIRECTED_FRAME(tpl) && (tpl->Status & TX_ERROR) == 0)
+ {
+ HighByte = GET_TRANSMIT_STATUS_HIGH_BYTE(tpl->Status);
+ HighAc = GET_FRAME_STATUS_HIGH_AC(HighByte);
+ LowAc = GET_FRAME_STATUS_LOW_AC(HighByte);
+
+ if((HighAc != LowAc) || (HighAc == AC_NOT_RECOGNIZED))
+ {
+ printk(KERN_INFO "%s: (DA=%08lX not recognized)",
+ dev->name,
+ *(unsigned long *)&tpl->MData[2+2]);
+ }
+ else
+ {
+ if(sktr_debug > 3)
+ printk("%s: Directed frame tx'd\n",
+ dev->name);
+ }
+ }
+ else
+ {
+ if(!DIRECTED_FRAME(tpl))
+ {
+ if(sktr_debug > 3)
+ printk("%s: Broadcast frame tx'd\n",
+ dev->name);
+ }
+ }
+
+ tp->MacStat.tx_packets++;
+ dev_kfree_skb(tpl->Skb);
+ tpl->BusyFlag = 0; /* "free" TPL */
+ }
+
+ dev->tbusy = 0;
+ if(tp->QueueSkb < MAX_TX_QUEUE)
+ sktr_hardware_send_packet(dev, tp);
+
+ return;
+}
+
+/*
+ * Called if a frame receive interrupt is generated by the adapter.
+ * Check if the frame is valid and indicate it to system.
+ */
+static void sktr_rcv_status_irq(struct net_device *dev)
+{
+ struct net_local *tp = (struct net_local *)dev->priv;
+ unsigned char *ReceiveDataPtr;
+ struct sk_buff *skb;
+ unsigned int Length, Length2;
+ RPL *rpl;
+ RPL *SaveHead;
+
+ /* NOTE: At this point the SSB from RECEIVE STATUS is no longer
+ * available, because the CLEAR SSB command has already been issued.
+ *
+ * Process all complete receives.
+ */
+
+ for(;;)
+ {
+ rpl = tp->RplHead;
+ if(rpl->Status & RX_VALID)
+ break; /* RPL still in use by adapter */
+
+ /* Forward RPLHead pointer to next list. */
+ SaveHead = tp->RplHead;
+ tp->RplHead = rpl->NextRPLPtr;
+
+ /* Get the frame size (Byte swap for Intel).
+ * Do this early (see workaround comment below)
+ */
+ Length = (unsigned short)SWAPB(rpl->FrameSize);
+
+ /* Check if the Frame_Start, Frame_End and
+ * Frame_Complete bits are set.
+ */
+ if((rpl->Status & VALID_SINGLE_BUFFER_FRAME)
+ == VALID_SINGLE_BUFFER_FRAME)
+ {
+ ReceiveDataPtr = rpl->MData;
+
+ /* Workaround for delayed write of FrameSize on ISA
+ * (FrameSize is false but valid-bit is reset)
+ * Frame size is set to zero when the RPL is freed.
+ * Length2 is there because there have also been
+ * cases where the FrameSize was partially written
+ */
+ Length2 = (unsigned short)SWAPB(rpl->FrameSize);
+
+ if(Length == 0 || Length != Length2)
+ {
+ tp->RplHead = SaveHead;
+ break; /* Return to sktr_interrupt */
+ }
+
+ /* Drop frames sent by myself */
+ if(sktr_chk_frame(dev, rpl->MData))
+ {
+ if(rpl->Skb != NULL)
+ dev_kfree_skb(rpl->Skb);
+ }
+ else
+ {
+ sktr_update_rcv_stats(tp,ReceiveDataPtr,Length);
+
+ if(sktr_debug > 3)
+ printk("%s: Packet Length %04X (%d)\n",
+ dev->name, Length, Length);
+
+ /* Indicate the received frame to system.
+ * The source routing padding is no more
+ * necessary with 2.2.x kernel.
+ * See: OpenOptions in sktr_init_opb()
+ */
+ skb = rpl->Skb;
+ if(rpl->SkbStat == SKB_UNAVAILABLE)
+ {
+ /* Try again to allocate skb */
+ skb = dev_alloc_skb(tp->MaxPacketSize);
+ if(skb == NULL)
+ {
+ /* Update Stats ?? */
+ }
+ else
+ {
+ skb->dev = dev;
+ skb_put(skb, tp->MaxPacketSize);
+ rpl->SkbStat = SKB_DATA_COPY;
+ ReceiveDataPtr = rpl->MData;
+ }
+ }
+
+ if(rpl->SkbStat == SKB_DATA_COPY
+ || rpl->SkbStat == SKB_DMA_DIRECT)
+ {
+ if(rpl->SkbStat == SKB_DATA_COPY)
+ {
+ memmove(skb->data, ReceiveDataPtr, Length);
+ }
+
+ /* Deliver frame to system */
+ rpl->Skb = NULL;
+ skb_trim(skb,Length);
+ skb->dev = dev;
+ skb->protocol = tr_type_trans(skb,dev);
+ netif_rx(skb);
+ }
+ }
+ }
+ else /* Invalid frame */
+ {
+ if(rpl->Skb != NULL)
+ dev_kfree_skb(rpl->Skb);
+
+ /* Skip list. */
+ if(rpl->Status & RX_START_FRAME)
+ /* Frame start bit is set -> overflow. */
+ tp->MacStat.rx_errors++;
+ }
+
+ /* Allocate new skb for rpl */
+ rpl->Skb = dev_alloc_skb(tp->MaxPacketSize);
+
+ /* skb == NULL ? then use local buffer */
+ if(rpl->Skb == NULL)
+ {
+ rpl->SkbStat = SKB_UNAVAILABLE;
+ rpl->FragList[0].DataAddr = htonl(virt_to_bus(tp->LocalRxBuffers[rpl->RPLIndex]));
+ rpl->MData = tp->LocalRxBuffers[rpl->RPLIndex];
+ }
+ else /* skb != NULL */
+ {
+ rpl->Skb->dev = dev;
+ skb_put(rpl->Skb, tp->MaxPacketSize);
+
+ /* Data unreachable for DMA ? then use local buffer */
+ if(tp->DeviceType == SK_ISA &&
+ virt_to_bus(rpl->Skb->data) + tp->MaxPacketSize
+ > ISA_MAX_ADDRESS)
+ {
+ rpl->SkbStat = SKB_DATA_COPY;
+ rpl->FragList[0].DataAddr = htonl(virt_to_bus(tp->LocalRxBuffers[rpl->RPLIndex]));
+ rpl->MData = tp->LocalRxBuffers[rpl->RPLIndex];
+ }
+ else
+ {
+ /* DMA directly in skb->data */
+ rpl->SkbStat = SKB_DMA_DIRECT;
+ rpl->FragList[0].DataAddr = htonl(virt_to_bus(rpl->Skb->data));
+ rpl->MData = rpl->Skb->data;
+ }
+ }
+
+ rpl->FragList[0].DataCount = SWAPB(tp->MaxPacketSize);
+ rpl->FrameSize = 0;
+
+ /* Pass the last RPL back to the adapter */
+ tp->RplTail->FrameSize = 0;
+
+ /* Reset the CSTAT field in the list. */
+ sktr_write_rpl_status(tp->RplTail, RX_VALID | RX_FRAME_IRQ);
+
+ /* Current RPL becomes last one in list. */
+ tp->RplTail = tp->RplTail->NextRPLPtr;
+
+ /* Inform adapter about RPL valid. */
+ sktr_exec_sifcmd(dev, CMD_RX_VALID);
+ }
+
+ return;
+}
+
+/*
+ * This function should be used whenever the status of any RPL must be
+ * modified by the driver, because the compiler may otherwise change the
+ * order of instructions such that writing the RPL status may be executed
+ * at an undesireable time. When this function is used, the status is
+ * always written when the function is called.
+ */
+static void sktr_write_rpl_status(RPL *rpl, unsigned int Status)
+{
+ rpl->Status = Status;
+
+ return;
+}
+
+/*
+ * The function updates the statistic counters in mac->MacStat.
+ * It differtiates between directed and broadcast/multicast ( ==functional)
+ * frames.
+ */
+static void sktr_update_rcv_stats(struct net_local *tp, unsigned char DataPtr[],
+ unsigned int Length)
+{
+ tp->MacStat.rx_packets++;
+
+ /* Test functional bit */
+ if(DataPtr[2] & GROUP_BIT)
+ tp->MacStat.multicast++;
+
+ return;
+}
+
+/*
+ * Check if it is a frame of myself. Compare source address with my current
+ * address in reverse direction, and mask out the TR_RII.
+ */
+static unsigned char sktr_chk_frame(struct net_device *dev, unsigned char *Addr)
+{
+ int i;
+
+ for(i = 5; i > 0; i--)
+ {
+ if(Addr[8 + i] != dev->dev_addr[i])
+ return (0);
+ }
+
+ /* Mask out RIF bit. */
+ if((Addr[8] & ~TR_RII) != (unsigned char)(dev->dev_addr[0]))
+ return (0);
+
+ return (1); /* It is my frame. */
+}
+
+/*
+ * Dump Packet (data)
+ */
+static void sktr_dump(unsigned char *Data, int length)
+{
+ int i, j;
+
+ for (i = 0, j = 0; i < length / 8; i++, j += 8)
+ {
+ printk(KERN_DEBUG "%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]);
+ }
+
+ return;
+}
+
+#ifdef MODULE
+
+static struct net_device* dev_sktr[SKTR_MAX_ADAPTERS];
+static int io[SKTR_MAX_ADAPTERS] = { 0, 0 };
+static int irq[SKTR_MAX_ADAPTERS] = { 0, 0 };
+static int mem[SKTR_MAX_ADAPTERS] = { 0, 0 };
+
+MODULE_PARM(io, "1-" __MODULE_STRING(SKTR_MAX_ADAPTERS) "i");
+MODULE_PARM(irq, "1-" __MODULE_STRING(SKTR_MAX_ADAPTERS) "i");
+MODULE_PARM(mem, "1-" __MODULE_STRING(SKTR_MAX_ADAPTERS) "i");
+
+int init_module(void)
+{
+ int i;
+
+ for(i = 0; i < SKTR_MAX_ADAPTERS; i++)
+ {
+ irq[i] = 0;
+ mem[i] = 0;
+ dev_sktr[i] = NULL;
+ dev_sktr[i] = init_trdev(dev_sktr[i], 0);
+ if(dev_sktr[i] == NULL)
+ return (-ENOMEM);
+
+ dev_sktr[i]->base_addr = io[i];
+ dev_sktr[i]->irq = irq[i];
+ dev_sktr[i]->mem_start = mem[i];
+ dev_sktr[i]->init = &sktr_probe;
+
+ if(register_trdev(dev_sktr[i]) != 0)
+ {
+ kfree_s(dev_sktr[i], sizeof(struct net_device));
+ dev_sktr[i] = NULL;
+ if(i == 0)
+ {
+ printk("sktr: register_trdev() returned non-zero.\n");
+ return (-EIO);
+ }
+ else
+ return (0);
+ }
+ }
+
+ return (0);
+}
+
+void cleanup_module(void)
+{
+ int i;
+
+ for(i = 0; i < SKTR_MAX_ADAPTERS; i++)
+ {
+ if(dev_sktr[i])
+ {
+ unregister_trdev(dev_sktr[i]);
+ release_region(dev_sktr[i]->base_addr, SKTR_IO_EXTENT);
+ if(dev_sktr[i]->irq)
+ free_irq(dev_sktr[i]->irq, dev_sktr[i]);
+ if(dev_sktr[i]->dma > 0)
+ free_dma(dev_sktr[i]->dma);
+ if(dev_sktr[i]->priv)
+ kfree_s(dev_sktr[i]->priv, sizeof(struct net_local));
+ kfree_s(dev_sktr[i], sizeof(struct net_device));
+ dev_sktr[i] = NULL;
+ }
+ }
+}
+#endif /* MODULE */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)