diff options
Diffstat (limited to 'drivers/net/tokenring/tms380tr.c')
| -rw-r--r-- | drivers/net/tokenring/tms380tr.c | 2410 |
1 files changed, 2410 insertions, 0 deletions
diff --git a/drivers/net/tokenring/tms380tr.c b/drivers/net/tokenring/tms380tr.c new file mode 100644 index 000000000000..df43b449e429 --- /dev/null +++ b/drivers/net/tokenring/tms380tr.c @@ -0,0 +1,2410 @@ +/* + * tms380tr.c: A network driver library for Texas Instruments TMS380-based + * Token Ring Adapters. + * + * Originally sktr.c: Written 1997 by Christoph Goos + * + * A fine result of the Linux Systems Network Architecture Project. + * http://www.linux-sna.org + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + * The following modules are currently available for card support: + * - tmspci (Generic PCI card support) + * - abyss (Madge PCI support) + * - tmsisa (SysKonnect TR4/16 ISA) + * + * 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. + * - TI TMS380 Second-Generation Token Ring User's Guide + * - TI datasheets for respective chips + * - David Hein at Texas Instruments + * - Various Madge employees + * + * Maintainer(s): + * JS Jay Schulist jschlst@samba.org + * CG Christoph Goos cgoos@syskonnect.de + * AF Adam Fritzler mid@auk.cx + * MLP Mike Phillips phillim@amtrak.com + * JF Jochen Friedrich jochen@scram.de + * + * 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 + * Sep-99 AF Renamed to tms380tr (supports more than SK's) + * 23-Sep-99 AF Added Compaq and Thomas-Conrad PCI support + * Fixed a bug causing double copies on PCI + * Fixed for new multicast stuff (2.2/2.3) + * 25-Sep-99 AF Uped TPL_NUM from 3 to 9 + * Removed extraneous 'No free TPL' + * 22-Dec-99 AF Added Madge PCI Mk2 support and generalized + * parts of the initilization procedure. + * 30-Dec-99 AF Turned tms380tr into a library ala 8390. + * Madge support is provided in the abyss module + * Generic PCI support is in the tmspci module. + * 30-Nov-00 JF Updated PCI code to support IO MMU via + * pci_map_static(). Alpha uses this MMU for ISA + * as well. + * 14-Jan-01 JF Fix DMA on ifdown/ifup sequences. Some + * cleanup. + * 13-Jan-02 JF Add spinlock to fix race condition. + * 09-Nov-02 JF Fixed printks to not SPAM the console during + * normal operation. + * 30-Dec-02 JF Removed incorrect __init from + * tms380tr_init_card. + * + * To do: + * 1. Multi/Broadcast packet handling (this may have fixed itself) + * 2. Write a sktrisa module that includes the old ISA support (done) + * 3. Allow modules to load their own microcode + * 4. Speed up the BUD process -- freezing the kernel for 3+sec is + * quite unacceptable. + * 5. Still a few remaining stalls when the cable is unplugged. + */ + +#ifdef MODULE +static const char version[] = "tms380tr.c: v1.10 30/12/2002 by Christoph Goos, Adam Fritzler\n"; +#endif + +#include <linux/module.h> +#include <linux/kernel.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/slab.h> +#include <linux/string.h> +#include <linux/time.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/trdevice.h> +#include <linux/firmware.h> +#include <linux/bitops.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/irq.h> +#include <asm/uaccess.h> + +#include "tms380tr.h" /* Our Stuff */ + +/* Use 0 for production, 1 for verification, 2 for debug, and + * 3 for very verbose debug. + */ +#ifndef TMS380TR_DEBUG +#define TMS380TR_DEBUG 0 +#endif +static unsigned int tms380tr_debug = TMS380TR_DEBUG; + +static struct device tms_device; + +/* Index to functions, as function prototypes. + * Alphabetical by function name. + */ + +/* "A" */ +/* "B" */ +static int tms380tr_bringup_diags(struct net_device *dev); +/* "C" */ +static void tms380tr_cancel_tx_queue(struct net_local* tp); +static int tms380tr_chipset_init(struct net_device *dev); +static void tms380tr_chk_irq(struct net_device *dev); +static void tms380tr_chk_outstanding_cmds(struct net_device *dev); +static void tms380tr_chk_src_addr(unsigned char *frame, unsigned char *hw_addr); +static unsigned char tms380tr_chk_ssb(struct net_local *tp, unsigned short IrqType); +int tms380tr_close(struct net_device *dev); +static void tms380tr_cmd_status_irq(struct net_device *dev); +/* "D" */ +static void tms380tr_disable_interrupts(struct net_device *dev); +#if TMS380TR_DEBUG > 0 +static void tms380tr_dump(unsigned char *Data, int length); +#endif +/* "E" */ +static void tms380tr_enable_interrupts(struct net_device *dev); +static void tms380tr_exec_cmd(struct net_device *dev, unsigned short Command); +static void tms380tr_exec_sifcmd(struct net_device *dev, unsigned int WriteValue); +/* "F" */ +/* "G" */ +static struct net_device_stats *tms380tr_get_stats(struct net_device *dev); +/* "H" */ +static int tms380tr_hardware_send_packet(struct sk_buff *skb, + struct net_device *dev); +/* "I" */ +static int tms380tr_init_adapter(struct net_device *dev); +static void tms380tr_init_ipb(struct net_local *tp); +static void tms380tr_init_net_local(struct net_device *dev); +static void tms380tr_init_opb(struct net_device *dev); +/* "M" */ +/* "O" */ +int tms380tr_open(struct net_device *dev); +static void tms380tr_open_adapter(struct net_device *dev); +/* "P" */ +/* "R" */ +static void tms380tr_rcv_status_irq(struct net_device *dev); +static int tms380tr_read_ptr(struct net_device *dev); +static void tms380tr_read_ram(struct net_device *dev, unsigned char *Data, + unsigned short Address, int Length); +static int tms380tr_reset_adapter(struct net_device *dev); +static void tms380tr_reset_interrupt(struct net_device *dev); +static void tms380tr_ring_status_irq(struct net_device *dev); +/* "S" */ +static int tms380tr_send_packet(struct sk_buff *skb, struct net_device *dev); +static void tms380tr_set_multicast_list(struct net_device *dev); +static int tms380tr_set_mac_address(struct net_device *dev, void *addr); +/* "T" */ +static void tms380tr_timer_chk(unsigned long data); +static void tms380tr_timer_end_wait(unsigned long data); +static void tms380tr_tx_status_irq(struct net_device *dev); +/* "U" */ +static void tms380tr_update_rcv_stats(struct net_local *tp, + unsigned char DataPtr[], unsigned int Length); +/* "W" */ +void tms380tr_wait(unsigned long time); +static void tms380tr_write_rpl_status(RPL *rpl, unsigned int Status); +static void tms380tr_write_tpl_status(TPL *tpl, unsigned int Status); + +#define SIFREADB(reg) (((struct net_local *)dev->priv)->sifreadb(dev, reg)) +#define SIFWRITEB(val, reg) (((struct net_local *)dev->priv)->sifwriteb(dev, val, reg)) +#define SIFREADW(reg) (((struct net_local *)dev->priv)->sifreadw(dev, reg)) +#define SIFWRITEW(val, reg) (((struct net_local *)dev->priv)->sifwritew(dev, val, reg)) + + + +#if 0 /* TMS380TR_DEBUG > 0 */ +static int madgemc_sifprobe(struct net_device *dev) +{ + unsigned char old, chk1, chk2; + + old = SIFREADB(SIFADR); /* Get the old SIFADR value */ + + chk1 = 0; /* Begin with check value 0 */ + do { + madgemc_setregpage(dev, 0); + /* Write new SIFADR value */ + SIFWRITEB(chk1, SIFADR); + chk2 = SIFREADB(SIFADR); + if (chk2 != chk1) + return -1; + + madgemc_setregpage(dev, 1); + /* Read, invert and write */ + chk2 = SIFREADB(SIFADD); + if (chk2 != chk1) + return -1; + + madgemc_setregpage(dev, 0); + chk2 ^= 0x0FE; + SIFWRITEB(chk2, SIFADR); + + /* Read, invert and compare */ + madgemc_setregpage(dev, 1); + chk2 = SIFREADB(SIFADD); + madgemc_setregpage(dev, 0); + chk2 ^= 0x0FE; + + if(chk1 != chk2) + return (-1); /* No adapter */ + chk1 -= 2; + } while(chk1 != 0); /* Repeat 128 times (all byte values) */ + + madgemc_setregpage(dev, 0); /* sanity */ + /* Restore the SIFADR value */ + SIFWRITEB(old, SIFADR); + + return (0); +} +#endif + +/* + * 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. + */ +int tms380tr_open(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + int err; + + /* init the spinlock */ + spin_lock_init(&tp->lock); + init_timer(&tp->timer); + + /* Reset the hardware here. Don't forget to set the station address. */ + +#ifdef CONFIG_ISA + if(dev->dma > 0) + { + unsigned long flags=claim_dma_lock(); + disable_dma(dev->dma); + set_dma_mode(dev->dma, DMA_MODE_CASCADE); + enable_dma(dev->dma); + release_dma_lock(flags); + } +#endif + + err = tms380tr_chipset_init(dev); + if(err) + { + printk(KERN_INFO "%s: Chipset initialization error\n", + dev->name); + return (-1); + } + + tp->timer.expires = jiffies + 30*HZ; + tp->timer.function = tms380tr_timer_end_wait; + tp->timer.data = (unsigned long)dev; + add_timer(&tp->timer); + + printk(KERN_DEBUG "%s: Adapter RAM size: %dK\n", + dev->name, tms380tr_read_ptr(dev)); + + tms380tr_enable_interrupts(dev); + tms380tr_open_adapter(dev); + + netif_start_queue(dev); + + /* 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) + { + tms380tr_disable_interrupts(dev); + return (-1); + } + + tp->StartTime = jiffies; + + /* Start function control timer */ + tp->timer.expires = jiffies + 2*HZ; + tp->timer.function = tms380tr_timer_chk; + tp->timer.data = (unsigned long)dev; + add_timer(&tp->timer); + + return (0); +} + +/* + * Timeout function while waiting for event + */ +static void tms380tr_timer_end_wait(unsigned long data) +{ + struct net_device *dev = (struct net_device*)data; + struct net_local *tp = netdev_priv(dev); + + if(tp->Sleeping) + { + tp->Sleeping = 0; + wake_up_interruptible(&tp->wait_for_tok_int); + } + + return; +} + +/* + * Initialize the chipset + */ +static int tms380tr_chipset_init(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + int err; + + tms380tr_init_ipb(tp); + tms380tr_init_opb(dev); + tms380tr_init_net_local(dev); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Resetting adapter...\n", dev->name); + err = tms380tr_reset_adapter(dev); + if(err < 0) + return (-1); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Bringup diags...\n", dev->name); + err = tms380tr_bringup_diags(dev); + if(err < 0) + return (-1); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Init adapter...\n", dev->name); + err = tms380tr_init_adapter(dev); + if(err < 0) + return (-1); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Done!\n", dev->name); + return (0); +} + +/* + * Initializes the net_local structure. + */ +static void tms380tr_init_net_local(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + int i; + dma_addr_t dmabuf; + + 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; + + /* Create circular chain of transmit lists */ + for (i = 0; i < TPL_NUM; i++) + { + tp->Tpl[i].NextTPLAddr = htonl(((char *)(&tp->Tpl[(i+1) % TPL_NUM]) - (char *)tp) + tp->dmabuffer); /* DMA buffer may be MMU driven */ + 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].DMABuff = 0; + 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(((char *)(&tp->Rpl[(i+1) % RPL_NUM]) - (char *)tp) + tp->dmabuffer); /* DMA buffer may be MMU driven */ + 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 = cpu_to_be16((unsigned short)tp->MaxPacketSize); + + /* Alloc skb and point adapter to data area */ + tp->Rpl[i].Skb = dev_alloc_skb(tp->MaxPacketSize); + tp->Rpl[i].DMABuff = 0; + + /* 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(((char *)tp->LocalRxBuffers[i] - (char *)tp) + tp->dmabuffer); + 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 */ + dmabuf = pci_map_single(tp->pdev, tp->Rpl[i].Skb->data, tp->MaxPacketSize, PCI_DMA_FROMDEVICE); + if(tp->dmalimit && (dmabuf + tp->MaxPacketSize > tp->dmalimit)) + { + tp->Rpl[i].SkbStat = SKB_DATA_COPY; + tp->Rpl[i].FragList[0].DataAddr = htonl(((char *)tp->LocalRxBuffers[i] - (char *)tp) + tp->dmabuffer); + 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(dmabuf); + tp->Rpl[i].MData = tp->Rpl[i].Skb->data; + tp->Rpl[i].DMABuff = dmabuf; + } + } + + 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 tms380tr_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 tms380tr_init_opb(struct net_device *dev) +{ + struct net_local *tp; + unsigned long Addr; + unsigned short RplSize = RPL_SIZE; + unsigned short TplSize = TPL_SIZE; + unsigned short BufferSize = BUFFER_SIZE; + int i; + + tp = netdev_priv(dev); + + tp->ocpl.OPENOptions = 0; + tp->ocpl.OPENOptions |= ENABLE_FULL_DUPLEX_SELECTION; + tp->ocpl.FullDuplex = 0; + tp->ocpl.FullDuplex |= OPEN_FULL_DUPLEX_OFF; + + /* + * Set node address + * + * We go ahead and put it in the OPB even though on + * most of the generic adapters this isn't required. + * Its simpler this way. -- ASF + */ + for (i=0;i<6;i++) + tp->ocpl.NodeAddr[i] = ((unsigned char *)dev->dev_addr)[i]; + + tp->ocpl.GroupAddr = 0; + tp->ocpl.FunctAddr = 0; + tp->ocpl.RxListSize = cpu_to_be16((unsigned short)RplSize); + tp->ocpl.TxListSize = cpu_to_be16((unsigned short)TplSize); + tp->ocpl.BufSize = cpu_to_be16((unsigned short)BufferSize); + tp->ocpl.Reserved = 0; + tp->ocpl.TXBufMin = TX_BUF_MIN; + tp->ocpl.TXBufMax = TX_BUF_MAX; + + Addr = htonl(((char *)tp->ProductID - (char *)tp) + tp->dmabuffer); + + tp->ocpl.ProdIDAddr[0] = LOWORD(Addr); + tp->ocpl.ProdIDAddr[1] = HIWORD(Addr); + + return; +} + +/* + * Send OPEN command to adapter + */ +static void tms380tr_open_adapter(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + + if(tp->OpenCommandIssued) + return; + + tp->OpenCommandIssued = 1; + tms380tr_exec_cmd(dev, OC_OPEN); + + return; +} + +/* + * Clear the adapter's interrupt flag. Clear system interrupt enable + * (SINTEN): disable adapter to system interrupts. + */ +static void tms380tr_disable_interrupts(struct net_device *dev) +{ + SIFWRITEB(0, SIFACL); + + return; +} + +/* + * Set the adapter's interrupt flag. Set system interrupt enable + * (SINTEN): enable adapter to system interrupts. + */ +static void tms380tr_enable_interrupts(struct net_device *dev) +{ + SIFWRITEB(ACL_SINTEN, SIFACL); + + return; +} + +/* + * Put command in command queue, try to execute it. + */ +static void tms380tr_exec_cmd(struct net_device *dev, unsigned short Command) +{ + struct net_local *tp = netdev_priv(dev); + + tp->CMDqueue |= Command; + tms380tr_chk_outstanding_cmds(dev); + + return; +} + +static void tms380tr_timeout(struct net_device *dev) +{ + /* + * 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 tms380tr_timer_chk() + */ + dev->trans_start = jiffies; + netif_wake_queue(dev); +} + +/* + * Gets skb from system, queues it and checks if it can be sent + */ +static int tms380tr_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + int err; + + err = tms380tr_hardware_send_packet(skb, dev); + if(tp->TplFree->NextTPLPtr->BusyFlag) + netif_stop_queue(dev); + return (err); +} + +/* + * Move frames into adapter tx queue + */ +static int tms380tr_hardware_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + TPL *tpl; + short length; + unsigned char *buf; + unsigned long flags; + int i; + dma_addr_t dmabuf, newbuf; + struct net_local *tp = netdev_priv(dev); + + /* 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. + */ + spin_lock_irqsave(&tp->lock, flags); + if(tp->TplFree->NextTPLPtr->BusyFlag) { /* No free TPL */ + if (tms380tr_debug > 0) + printk(KERN_DEBUG "%s: No free TPL\n", dev->name); + spin_unlock_irqrestore(&tp->lock, flags); + return 1; + } + + dmabuf = 0; + + /* Is buffer reachable for Busmaster-DMA? */ + + length = skb->len; + dmabuf = pci_map_single(tp->pdev, skb->data, length, PCI_DMA_TODEVICE); + if(tp->dmalimit && (dmabuf + length > tp->dmalimit)) { + /* Copy frame to local buffer */ + pci_unmap_single(tp->pdev, dmabuf, length, PCI_DMA_TODEVICE); + dmabuf = 0; + i = tp->TplFree->TPLIndex; + buf = tp->LocalTxBuffers[i]; + memcpy(buf, skb->data, length); + newbuf = ((char *)buf - (char *)tp) + tp->dmabuffer; + } + else { + /* Send direct from skb->data */ + newbuf = dmabuf; + buf = skb->data; + } + /* Source address in packet? */ + tms380tr_chk_src_addr(buf, 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->DMABuff = dmabuf; + tpl->FragList[0].DataCount = cpu_to_be16((unsigned short)length); + tpl->FragList[0].DataAddr = htonl(newbuf); + + /* Write the data length in the transmit list. */ + tpl->FrameSize = cpu_to_be16((unsigned short)length); + tpl->MData = buf; + + /* Transmit the frame and set the status values. */ + tms380tr_write_tpl_status(tpl, TX_VALID | TX_START_FRAME + | TX_END_FRAME | TX_PASS_SRC_ADDR + | TX_FRAME_IRQ); + + /* Let adapter send the frame. */ + tms380tr_exec_sifcmd(dev, CMD_TX_VALID); + spin_unlock_irqrestore(&tp->lock, flags); + + return 0; +} + +/* + * 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 tms380tr_write_tpl_status(TPL *tpl, unsigned int Status) +{ + tpl->Status = Status; +} + +static void tms380tr_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 tms380tr_timer_chk(unsigned long data) +{ + struct net_device *dev = (struct net_device*)data; + struct net_local *tp = netdev_priv(dev); + + if(tp->HaltInProgress) + return; + + tms380tr_chk_outstanding_cmds(dev); + if(time_before(tp->LastSendTime + SEND_TIMEOUT, jiffies) + && (tp->TplFree != tp->TplBusy)) + { + /* Anything to send, but stalled too long */ + tp->LastSendTime = jiffies; + tms380tr_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; + tms380tr_open_adapter(dev); + + return; +} + +/* + * The typical workload of the driver: Handle the network interface interrupts. + */ +irqreturn_t tms380tr_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + struct net_local *tp; + unsigned short irq_type; + int handled = 0; + + if(dev == NULL) { + printk(KERN_INFO "%s: irq %d for unknown device.\n", dev->name, irq); + return IRQ_NONE; + } + + tp = netdev_priv(dev); + + irq_type = SIFREADW(SIFSTS); + + while(irq_type & STS_SYSTEM_IRQ) { + handled = 1; + irq_type &= STS_IRQ_MASK; + + if(!tms380tr_chk_ssb(tp, irq_type)) { + printk(KERN_DEBUG "%s: DATA LATE occurred\n", dev->name); + break; + } + + switch(irq_type) { + case STS_IRQ_RECEIVE_STATUS: + tms380tr_reset_interrupt(dev); + tms380tr_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. */ + tms380tr_exec_cmd(dev, OC_TRANSMIT); + } + + tms380tr_reset_interrupt(dev); + tms380tr_tx_status_irq(dev); + break; + + case STS_IRQ_COMMAND_STATUS: + /* The SSB contains status of last command + * other than receive/transmit. + */ + tms380tr_cmd_status_irq(dev); + break; + + case STS_IRQ_SCB_CLEAR: + /* The SCB is free for another command. */ + tp->ScbInUse = 0; + tms380tr_chk_outstanding_cmds(dev); + break; + + case STS_IRQ_RING_STATUS: + tms380tr_ring_status_irq(dev); + break; + + case STS_IRQ_ADAPTER_CHECK: + tms380tr_chk_irq(dev); + break; + + case STS_IRQ_LLC_STATUS: + printk(KERN_DEBUG "tms380tr: unexpected LLC status IRQ\n"); + break; + + case STS_IRQ_TIMER: + printk(KERN_DEBUG "tms380tr: unexpected Timer IRQ\n"); + break; + + case STS_IRQ_RECEIVE_PENDING: + printk(KERN_DEBUG "tms380tr: unexpected Receive Pending IRQ\n"); + break; + + default: + printk(KERN_DEBUG "Unknown Token Ring IRQ (0x%04x)\n", irq_type); + break; + } + + /* Reset system interrupt if not already done. */ + if(irq_type != STS_IRQ_TRANSMIT_STATUS + && irq_type != STS_IRQ_RECEIVE_STATUS) { + tms380tr_reset_interrupt(dev); + } + + irq_type = SIFREADW(SIFSTS); + } + + return IRQ_RETVAL(handled); +} + +/* + * Reset the INTERRUPT SYSTEM bit and issue SSB CLEAR command. + */ +static void tms380tr_reset_interrupt(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + 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. + */ + tms380tr_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 tms380tr_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 tms380tr_cmd_status_irq(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + 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; + tms380tr_exec_cmd(dev, OC_TRANSMIT); + tms380tr_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; + tms380tr_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 tms380tr_open(). + */ +int tms380tr_close(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + netif_stop_queue(dev); + + del_timer(&tp->timer); + + /* Flush the Tx and disable Rx here. */ + + tp->HaltInProgress = 1; + tms380tr_exec_cmd(dev, OC_CLOSE); + tp->timer.expires = jiffies + 1*HZ; + tp->timer.function = tms380tr_timer_end_wait; + tp->timer.data = (unsigned long)dev; + add_timer(&tp->timer); + + tms380tr_enable_interrupts(dev); + + tp->Sleeping = 1; + interruptible_sleep_on(&tp->wait_for_tok_int); + tp->TransmitCommandActive = 0; + + del_timer(&tp->timer); + tms380tr_disable_interrupts(dev); + +#ifdef CONFIG_ISA + if(dev->dma > 0) + { + unsigned long flags=claim_dma_lock(); + disable_dma(dev->dma); + release_dma_lock(flags); + } +#endif + + SIFWRITEW(0xFF00, SIFCMD); +#if 0 + if(dev->dma > 0) /* what the? */ + SIFWRITEB(0xff, POSREG); +#endif + tms380tr_cancel_tx_queue(tp); + + return (0); +} + +/* + * Get the current statistics. This may be called with the card open + * or closed. + */ +static struct net_device_stats *tms380tr_get_stats(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + + return ((struct net_device_stats *)&tp->MacStat); +} + +/* + * Set or clear the multicast filter for this adapter. + */ +static void tms380tr_set_multicast_list(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + 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; + } + } + tms380tr_exec_cmd(dev, OC_SET_FUNCT_ADDR); + } + + tp->ocpl.OPENOptions = OpenOptions; + tms380tr_exec_cmd(dev, OC_MODIFY_OPEN_PARMS); + return; +} + +/* + * Wait for some time (microseconds) + */ +void tms380tr_wait(unsigned long time) +{ +#if 0 + long tmp; + + tmp = jiffies + time/(1000000/HZ); + do { + current->state = TASK_INTERRUPTIBLE; + tmp = schedule_timeout(tmp); + } while(time_after(tmp, jiffies)); +#else + udelay(time); +#endif + return; +} + +/* + * Write a command value to the SIFCMD register + */ +static void tms380tr_exec_sifcmd(struct net_device *dev, unsigned int WriteValue) +{ + 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 = SIFREADW(SIFSTS); + } while((SifStsValue & CMD_INTERRUPT_ADAPTER) && loop_counter--); + SIFWRITEW(cmd, SIFCMD); + + return; +} + +/* + * Processes adapter hardware reset, halts adapter and downloads firmware, + * clears the halt bit. + */ +static int tms380tr_reset_adapter(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + unsigned short *fw_ptr; + unsigned short count, c, count2; + const struct firmware *fw_entry = NULL; + + strncpy(tms_device.bus_id,dev->name, BUS_ID_SIZE); + + if (request_firmware(&fw_entry, "tms380tr.bin", &tms_device) != 0) { + printk(KERN_ALERT "%s: firmware %s is missing, cannot start.\n", + dev->name, "tms380tr.bin"); + return (-1); + } + + fw_ptr = (unsigned short *)fw_entry->data; + count2 = fw_entry->size / 2; + + /* Hardware adapter reset */ + SIFWRITEW(ACL_ARESET, SIFACL); + tms380tr_wait(40); + + c = SIFREADW(SIFACL); + tms380tr_wait(20); + + if(dev->dma == 0) /* For PCI adapters */ + { + c &= ~(ACL_NSELOUT0 | ACL_NSELOUT1); /* Clear bits */ + if(tp->setnselout) + c |= (*tp->setnselout)(dev); + } + + /* 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_BOOT; + c |= ACL_SINTEN; + c &= ~ACL_PSDMAEN; /* Clear pseudo dma bit */ + SIFWRITEW(c, SIFACL); + tms380tr_wait(40); + + count = 0; + /* Download firmware via DIO interface: */ + do { + if (count2 < 3) continue; + + /* Download first address part */ + SIFWRITEW(*fw_ptr, SIFADX); + fw_ptr++; + count2--; + /* Download second address part */ + SIFWRITEW(*fw_ptr, SIFADD); + fw_ptr++; + count2--; + + if((count = *fw_ptr) != 0) /* Load loop counter */ + { + fw_ptr++; /* Download block data */ + count2--; + if (count > count2) continue; + + for(; count > 0; count--) + { + SIFWRITEW(*fw_ptr, SIFINC); + fw_ptr++; + count2--; + } + } + else /* Stop, if last block downloaded */ + { + c = SIFREADW(SIFACL); + c &= (~ACL_CPHALT | ACL_SINTEN); + + /* Clear CPHALT and start BUD */ + SIFWRITEW(c, SIFACL); + if (fw_entry) + release_firmware(fw_entry); + return (1); + } + } while(count == 0); + + if (fw_entry) + release_firmware(fw_entry); + printk(KERN_INFO "%s: Adapter Download Failed\n", dev->name); + return (-1); +} + +/* + * Starts bring up diagnostics of token ring adapter and evaluates + * diagnostic results. + */ +static int tms380tr_bringup_diags(struct net_device *dev) +{ + int loop_cnt, retry_cnt; + unsigned short Status; + + tms380tr_wait(HALF_SECOND); + tms380tr_exec_sifcmd(dev, EXEC_SOFT_RESET); + tms380tr_wait(HALF_SECOND); + + retry_cnt = BUD_MAX_RETRIES; /* maximal number of retrys */ + + do { + retry_cnt--; + if(tms380tr_debug > 3) + printk(KERN_DEBUG "BUD-Status: "); + loop_cnt = BUD_MAX_LOOPCNT; /* maximum: three seconds*/ + do { /* Inspect BUD results */ + loop_cnt--; + tms380tr_wait(HALF_SECOND); + Status = SIFREADW(SIFSTS); + Status &= STS_MASK; + + if(tms380tr_debug > 3) + printk(KERN_DEBUG " %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); + tms380tr_exec_sifcmd(dev, EXEC_SOFT_RESET); + tms380tr_wait(HALF_SECOND); + } + } while(retry_cnt > 0); + + Status = SIFREADW(SIFSTS); + + printk(KERN_INFO "%s: Hardware error\n", dev->name); + /* Hardware error occurred! */ + Status &= 0x001f; + if (Status & 0x0010) + printk(KERN_INFO "%s: BUD Error: Timeout\n", dev->name); + else if ((Status & 0x000f) > 6) + printk(KERN_INFO "%s: BUD Error: Illegal Failure\n", dev->name); + else + printk(KERN_INFO "%s: Bring Up Diagnostics Error (%04X) occurred\n", dev->name, Status & 0x000f); + + return (-1); +} + +/* + * Copy initialisation data to adapter memory, beginning at address + * 1:0A00; Starting DMA test and evaluating result bits. + */ +static int tms380tr_init_adapter(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + + 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; + + /* Normalize: byte order low/high, word order high/low! (only IPB!) */ + tp->ipb.SCB_Addr = SWAPW(((char *)&tp->scb - (char *)tp) + tp->dmabuffer); + tp->ipb.SSB_Addr = SWAPW(((char *)&tp->ssb - (char *)tp) + tp->dmabuffer); + + if(tms380tr_debug > 3) + { + printk(KERN_DEBUG "%s: buffer (real): %lx\n", dev->name, (long) &tp->scb); + printk(KERN_DEBUG "%s: buffer (virt): %lx\n", dev->name, (long) ((char *)&tp->scb - (char *)tp) + (long) tp->dmabuffer); + printk(KERN_DEBUG "%s: buffer (DMA) : %lx\n", dev->name, (long) tp->dmabuffer); + printk(KERN_DEBUG "%s: buffer (tp) : %lx\n", dev->name, (long) tp); + } + /* Maximum: three initialization retries */ + retry_cnt = INIT_MAX_RETRIES; + + do { + retry_cnt--; + + /* Transfer initialization block */ + SIFWRITEW(0x0001, SIFADX); + + /* To address 0001:0A00 of adapter RAM */ + SIFWRITEW(0x0A00, SIFADD); + + /* Write 11 words to adapter RAM */ + for(i = 0; i < 11; i++) + SIFWRITEW(ipb_ptr[i], SIFINC); + + /* Execute SCB adapter command */ + tms380tr_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--; + tms380tr_wait(HALF_SECOND); + + /* Mask interesting status bits */ + Status = SIFREADW(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)) + { + printk(KERN_INFO "%s: DMA failed\n", dev->name); + /* 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 = SIFREADW(SIFSTS); + Status &= STS_ERROR_MASK; + /* ShowInitialisationErrorCode(Status); */ + printk(KERN_INFO "%s: Status error: %d\n", dev->name, Status); + return (-1); /* Unrecoverable error */ + } + else + { + if(retry_cnt > 0) + { + /* Reset adapter and try init again */ + tms380tr_exec_sifcmd(dev, EXEC_SOFT_RESET); + tms380tr_wait(HALF_SECOND); + } + } + } + } while(retry_cnt > 0); + + printk(KERN_INFO "%s: Retry exceeded\n", dev->name); + 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 tms380tr_chk_outstanding_cmds(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + unsigned long Addr = 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; + + Addr = htonl(((char *)&tp->ocpl - (char *)tp) + tp->dmabuffer); + 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(((char *)tp->RplHead - (char *)tp) + tp->dmabuffer); + 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; + tms380tr_exec_cmd(dev, OC_TRANSMIT_HALT) ; + } + tp->TransmitCommandActive = 0; + return; + } + + tp->CMDqueue ^= OC_TRANSMIT; + tms380tr_cancel_tx_queue(tp); + Addr = htonl(((char *)tp->TplBusy - (char *)tp) + tp->dmabuffer); + 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(((char *)&tp->errorlogtable - (char *)tp) + tp->dmabuffer); + 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. */ + tms380tr_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 + * circuit 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 tms380tr_ring_status_irq(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + + tp->CurrentRingStatus = be16_to_cpu((unsigned short)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); + tms380tr_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)," + "CurrentRingStat %x\n", + dev->name, tp->CurrentRingStatus); + tp->AdapterOpenFlag = 0; + tms380tr_open_adapter(dev); + } + + return; +} + +/* + * Issued if adapter has encountered an unrecoverable hardware + * or software error. + */ +static void tms380tr_chk_irq(struct net_device *dev) +{ + int i; + unsigned short AdapterCheckBlock[4]; + struct net_local *tp = netdev_priv(dev); + + tp->AdapterOpenFlag = 0; /* Adapter closed now */ + + /* Page number of adapter memory */ + SIFWRITEW(0x0001, SIFADX); + /* Address offset */ + SIFWRITEW(CHECKADDR, SIFADR); + + /* Reading 8 byte adapter check block. */ + for(i = 0; i < 4; i++) + AdapterCheckBlock[i] = SIFREADW(SIFINC); + + if(tms380tr_debug > 3) + { + printk(KERN_DEBUG "%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(KERN_INFO "%s: Illegal operation code in firmware\n", + dev->name); + /* Parm[0-3]: adapter internal register R13-R15 */ + break; + + case PARITY_ERRORS: + printk(KERN_INFO "%s: Adapter internal bus parity error\n", + dev->name); + /* Parm[0-3]: adapter internal register R13-R15 */ + break; + + case RAM_DATA_ERROR: + printk(KERN_INFO "%s: RAM data error\n", dev->name); + /* Parm[0-1]: MSW/LSW address of RAM location. */ + break; + + case RAM_PARITY_ERROR: + printk(KERN_INFO "%s: RAM parity error\n", dev->name); + /* Parm[0-1]: MSW/LSW address of RAM location. */ + break; + + case RING_UNDERRUN: + printk(KERN_INFO "%s: Internal DMA underrun detected\n", + dev->name); + break; + + case INVALID_IRQ: + printk(KERN_INFO "%s: Unrecognized interrupt detected\n", + dev->name); + /* Parm[0-3]: adapter internal register R13-R15 */ + break; + + case INVALID_ERROR_IRQ: + printk(KERN_INFO "%s: Unrecognized error interrupt detected\n", + dev->name); + /* Parm[0-3]: adapter internal register R13-R15 */ + break; + + case INVALID_XOP: + printk(KERN_INFO "%s: Unrecognized XOP request detected\n", + dev->name); + /* Parm[0-3]: adapter internal register R13-R15 */ + break; + + default: + printk(KERN_INFO "%s: Unknown status", dev->name); + break; + } + + if(tms380tr_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 int tms380tr_read_ptr(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + unsigned short adapterram; + + tms380tr_read_ram(dev, (unsigned char *)&tp->intptrs.BurnedInAddrPtr, + ADAPTER_INT_PTRS, 16); + tms380tr_read_ram(dev, (unsigned char *)&adapterram, + cpu_to_be16((unsigned short)tp->intptrs.AdapterRAMPtr), 2); + return be16_to_cpu(adapterram); +} + +/* + * Reads a number of bytes from adapter to system memory. + */ +static void tms380tr_read_ram(struct net_device *dev, unsigned char *Data, + unsigned short Address, int Length) +{ + int i; + unsigned short old_sifadx, old_sifadr, InWord; + + /* Save the current values */ + old_sifadx = SIFREADW(SIFADX); + old_sifadr = SIFREADW(SIFADR); + + /* Page number of adapter memory */ + SIFWRITEW(0x0001, SIFADX); + /* Address offset in adapter RAM */ + SIFWRITEW(Address, SIFADR); + + /* Copy len byte from adapter memory to system data area. */ + i = 0; + for(;;) + { + InWord = SIFREADW(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 */ + SIFWRITEW(old_sifadx, SIFADX); + SIFWRITEW(old_sifadr, SIFADR); + + return; +} + +/* + * Cancel all queued packets in the transmission queue. + */ +static void tms380tr_cancel_tx_queue(struct net_local* tp) +{ + TPL *tpl; + + /* + * 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; + tms380tr_write_tpl_status(tpl, 0); /* Clear VALID bit */ + tpl->BusyFlag = 0; /* "free" TPL */ + + printk(KERN_INFO "Cancel tx (%08lXh).\n", (unsigned long)tpl); + if (tpl->DMABuff) + pci_unmap_single(tp->pdev, tpl->DMABuff, tpl->Skb->len, PCI_DMA_TODEVICE); + dev_kfree_skb_any(tpl->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 tms380tr_tx_status_irq(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + 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 ; + + /* 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_DEBUG "%s: (DA=%08lX not recognized)\n", + dev->name, + *(unsigned long *)&tpl->MData[2+2]); + } + else + { + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Directed frame tx'd\n", + dev->name); + } + } + else + { + if(!DIRECTED_FRAME(tpl)) + { + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Broadcast frame tx'd\n", + dev->name); + } + } + + tp->MacStat.tx_packets++; + if (tpl->DMABuff) + pci_unmap_single(tp->pdev, tpl->DMABuff, tpl->Skb->len, PCI_DMA_TODEVICE); + dev_kfree_skb_irq(tpl->Skb); + tpl->BusyFlag = 0; /* "free" TPL */ + } + + if(!tp->TplFree->NextTPLPtr->BusyFlag) + netif_wake_queue(dev); + 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 tms380tr_rcv_status_irq(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + unsigned char *ReceiveDataPtr; + struct sk_buff *skb; + unsigned int Length, Length2; + RPL *rpl; + RPL *SaveHead; + dma_addr_t dmabuf; + + /* 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 = be16_to_cpu((unsigned short)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 = be16_to_cpu((unsigned short)rpl->FrameSize); + + if(Length == 0 || Length != Length2) + { + tp->RplHead = SaveHead; + break; /* Return to tms380tr_interrupt */ + } + tms380tr_update_rcv_stats(tp,ReceiveDataPtr,Length); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Packet Length %04X (%d)\n", + dev->name, Length, Length); + + /* Indicate the received frame to system the + * adapter does the Source-Routing padding for + * us. See: OpenOptions in tms380tr_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(skb && (rpl->SkbStat == SKB_DATA_COPY + || rpl->SkbStat == SKB_DMA_DIRECT)) + { + if(rpl->SkbStat == SKB_DATA_COPY) + memcpy(skb->data, ReceiveDataPtr, Length); + + /* Deliver frame to system */ + rpl->Skb = NULL; + skb_trim(skb,Length); + skb->protocol = tr_type_trans(skb,dev); + netif_rx(skb); + dev->last_rx = jiffies; + } + } + else /* Invalid frame */ + { + if(rpl->Skb != NULL) + dev_kfree_skb_irq(rpl->Skb); + + /* Skip list. */ + if(rpl->Status & RX_START_FRAME) + /* Frame start bit is set -> overflow. */ + tp->MacStat.rx_errors++; + } + if (rpl->DMABuff) + pci_unmap_single(tp->pdev, rpl->DMABuff, tp->MaxPacketSize, PCI_DMA_TODEVICE); + rpl->DMABuff = 0; + + /* 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(((char *)tp->LocalRxBuffers[rpl->RPLIndex] - (char *)tp) + tp->dmabuffer); + 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 */ + dmabuf = pci_map_single(tp->pdev, rpl->Skb->data, tp->MaxPacketSize, PCI_DMA_FROMDEVICE); + if(tp->dmalimit && (dmabuf + tp->MaxPacketSize > tp->dmalimit)) + { + rpl->SkbStat = SKB_DATA_COPY; + rpl->FragList[0].DataAddr = htonl(((char *)tp->LocalRxBuffers[rpl->RPLIndex] - (char *)tp) + tp->dmabuffer); + rpl->MData = tp->LocalRxBuffers[rpl->RPLIndex]; + } + else + { + /* DMA directly in skb->data */ + rpl->SkbStat = SKB_DMA_DIRECT; + rpl->FragList[0].DataAddr = htonl(dmabuf); + rpl->MData = rpl->Skb->data; + rpl->DMABuff = dmabuf; + } + } + + rpl->FragList[0].DataCount = cpu_to_be16((unsigned short)tp->MaxPacketSize); + rpl->FrameSize = 0; + + /* Pass the last RPL back to the adapter */ + tp->RplTail->FrameSize = 0; + + /* Reset the CSTAT field in the list. */ + tms380tr_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. */ + tms380tr_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 tms380tr_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 tms380tr_update_rcv_stats(struct net_local *tp, unsigned char DataPtr[], + unsigned int Length) +{ + tp->MacStat.rx_packets++; + tp->MacStat.rx_bytes += Length; + + /* Test functional bit */ + if(DataPtr[2] & GROUP_BIT) + tp->MacStat.multicast++; + + return; +} + +static int tms380tr_set_mac_address(struct net_device *dev, void *addr) +{ + struct net_local *tp = netdev_priv(dev); + struct sockaddr *saddr = addr; + + if (tp->AdapterOpenFlag || tp->AdapterVirtOpenFlag) { + printk(KERN_WARNING "%s: Cannot set MAC/LAA address while card is open\n", dev->name); + return -EIO; + } + memcpy(dev->dev_addr, saddr->sa_data, dev->addr_len); + return 0; +} + +#if TMS380TR_DEBUG > 0 +/* + * Dump Packet (data) + */ +static void tms380tr_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; +} +#endif + +void tmsdev_term(struct net_device *dev) +{ + struct net_local *tp; + + tp = netdev_priv(dev); + pci_unmap_single(tp->pdev, tp->dmabuffer, sizeof(struct net_local), + PCI_DMA_BIDIRECTIONAL); +} + +int tmsdev_init(struct net_device *dev, unsigned long dmalimit, + struct pci_dev *pdev) +{ + struct net_local *tms_local; + + memset(dev->priv, 0, sizeof(struct net_local)); + tms_local = netdev_priv(dev); + init_waitqueue_head(&tms_local->wait_for_tok_int); + tms_local->dmalimit = dmalimit; + tms_local->pdev = pdev; + tms_local->dmabuffer = pci_map_single(pdev, (void *)tms_local, + sizeof(struct net_local), PCI_DMA_BIDIRECTIONAL); + if (tms_local->dmabuffer + sizeof(struct net_local) > dmalimit) + { + printk(KERN_INFO "%s: Memory not accessible for DMA\n", + dev->name); + tmsdev_term(dev); + return -ENOMEM; + } + + /* These can be overridden by the card driver if needed */ + dev->open = tms380tr_open; + dev->stop = tms380tr_close; + dev->do_ioctl = NULL; + dev->hard_start_xmit = tms380tr_send_packet; + dev->tx_timeout = tms380tr_timeout; + dev->watchdog_timeo = HZ; + dev->get_stats = tms380tr_get_stats; + dev->set_multicast_list = &tms380tr_set_multicast_list; + dev->set_mac_address = tms380tr_set_mac_address; + + return 0; +} + +#ifdef MODULE + +EXPORT_SYMBOL(tms380tr_open); +EXPORT_SYMBOL(tms380tr_close); +EXPORT_SYMBOL(tms380tr_interrupt); +EXPORT_SYMBOL(tmsdev_init); +EXPORT_SYMBOL(tmsdev_term); +EXPORT_SYMBOL(tms380tr_wait); + +struct module *TMS380_module = NULL; + +int init_module(void) +{ + printk(KERN_DEBUG "%s", version); + + TMS380_module = &__this_module; + return 0; +} + +void cleanup_module(void) +{ + TMS380_module = NULL; +} +#endif + +MODULE_LICENSE("GPL"); + + +/* + * Local variables: + * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c tms380tr.c" + * alt-compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer -I/usr/src/linux/drivers/net/tokenring/ -c tms380tr.c" + * c-set-style "K&R" + * c-indent-level: 8 + * c-basic-offset: 8 + * tab-width: 8 + * End: + */ |