linux/drivers/net/tokenring/tms380tr.c

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/*
* 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.vanheusden.com/sna/
*
* 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
* 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.
* 22-Jul-05 JF Converted to dma-mapping.
*
* 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/string.h>
#include <linux/time.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/dma-mapping.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;
/* 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 netdev_tx_t 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 netdev_tx_t 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 *)netdev_priv(dev))->sifreadb(dev, reg))
#define SIFWRITEB(val, reg) \
(((struct net_local *)netdev_priv(dev))->sifwriteb(dev, val, reg))
#define SIFREADW(reg) \
(((struct net_local *)netdev_priv(dev))->sifreadw(dev, reg))
#define SIFWRITEW(val, reg) \
(((struct net_local *)netdev_priv(dev))->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);
}
}
/*
* 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 = dma_map_single(tp->pdev, tp->Rpl[i].Skb->data, tp->MaxPacketSize, DMA_FROM_DEVICE);
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);
}
/*
* 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;
}
/*
* 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);
}
/*
* 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);
}
/*
* 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);
}
/*
* 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);
}
/*
* 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);
}
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; /* prevent tx timeout */
netif_wake_queue(dev);
}
/*
* Gets skb from system, queues it and checks if it can be sent
*/
static netdev_tx_t tms380tr_send_packet(struct sk_buff *skb,
struct net_device *dev)
{
struct net_local *tp = netdev_priv(dev);
netdev_tx_t rc;
rc = tms380tr_hardware_send_packet(skb, dev);
if(tp->TplFree->NextTPLPtr->BusyFlag)
netif_stop_queue(dev);
return rc;
}
/*
* Move frames into adapter tx queue
*/
static netdev_tx_t 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 NETDEV_TX_BUSY;
}
dmabuf = 0;
/* Is buffer reachable for Busmaster-DMA? */
length = skb->len;
dmabuf = dma_map_single(tp->pdev, skb->data, length, DMA_TO_DEVICE);
if(tp->dmalimit && (dmabuf + length > tp->dmalimit)) {
/* Copy frame to local buffer */
dma_unmap_single(tp->pdev, dmabuf, length, DMA_TO_DEVICE);
dmabuf = 0;
i = tp->TplFree->TPLIndex;
buf = tp->LocalTxBuffers[i];
skb_copy_from_linear_data(skb, buf, 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 NETDEV_TX_OK;
}
/*
* 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 undesirable 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;
}
/*
* 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);
}
/*
* The typical workload of the driver: Handle the network interface interrupts.
*/
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
irqreturn_t tms380tr_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct net_local *tp;
unsigned short irq_type;
int handled = 0;
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);
}
/*
* 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;
}
}
/*
* 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
{
struct netdev_hw_addr *ha;
netdev_for_each_mc_addr(ha, dev) {
((char *)(&tp->ocpl.FunctAddr))[0] |=
ha->addr[2];
((char *)(&tp->ocpl.FunctAddr))[1] |=
ha->addr[3];
((char *)(&tp->ocpl.FunctAddr))[2] |=
ha->addr[4];
((char *)(&tp->ocpl.FunctAddr))[3] |=
ha->addr[5];
}
}
tms380tr_exec_cmd(dev, OC_SET_FUNCT_ADDR);
}
tp->ocpl.OPENOptions = OpenOptions;
tms380tr_exec_cmd(dev, OC_MODIFY_OPEN_PARMS);
}
/*
* Wait for some time (microseconds)
*/
void tms380tr_wait(unsigned long time)
{
#if 0
long tmp;
tmp = jiffies + time/(1000000/HZ);
do {
tmp = schedule_timeout_interruptible(tmp);
} while(time_after(tmp, jiffies));
#else
mdelay(time / 1000);
#endif
}
/*
* 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);
}
/*
* 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;
if (request_firmware(&fw_entry, "tms380tr.bin", tp->pdev) != 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);
release_firmware(fw_entry);
return 1;
}
} while(count == 0);
release_firmware(fw_entry);
printk(KERN_INFO "%s: Adapter Download Failed\n", dev->name);
return -1;
}
MODULE_FIRMWARE("tms380tr.bin");
/*
* 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);
}
/*
* 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);
}
}
/*
* 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;
}
}
/*
* 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);
}
/*
* 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)
dma_unmap_single(tp->pdev, tpl->DMABuff, tpl->Skb->len, DMA_TO_DEVICE);
dev_kfree_skb_any(tpl->Skb);
}
}
/*
* 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)
dma_unmap_single(tp->pdev, tpl->DMABuff, tpl->Skb->len, DMA_TO_DEVICE);
dev_kfree_skb_irq(tpl->Skb);
tpl->BusyFlag = 0; /* "free" TPL */
}
if(!tp->TplFree->NextTPLPtr->BusyFlag)
netif_wake_queue(dev);
}
/*
* 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(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(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_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)
skb_copy_to_linear_data(skb, ReceiveDataPtr,
Length);
/* Deliver frame to system */
rpl->Skb = NULL;
skb_trim(skb,Length);
skb->protocol = tr_type_trans(skb,dev);
netif_rx(skb);
}
}
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)
dma_unmap_single(tp->pdev, rpl->DMABuff, tp->MaxPacketSize, DMA_TO_DEVICE);
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 = dma_map_single(tp->pdev, rpl->Skb->data, tp->MaxPacketSize, DMA_FROM_DEVICE);
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);
}
}
/*
* 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 undesirable 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;
}
/*
* 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++;
}
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]);
}
}
#endif
void tmsdev_term(struct net_device *dev)
{
struct net_local *tp;
tp = netdev_priv(dev);
dma_unmap_single(tp->pdev, tp->dmabuffer, sizeof(struct net_local),
DMA_BIDIRECTIONAL);
}
const struct net_device_ops tms380tr_netdev_ops = {
.ndo_open = tms380tr_open,
.ndo_stop = tms380tr_close,
.ndo_start_xmit = tms380tr_send_packet,
.ndo_tx_timeout = tms380tr_timeout,
.ndo_get_stats = tms380tr_get_stats,
.ndo_set_rx_mode = tms380tr_set_multicast_list,
.ndo_set_mac_address = tms380tr_set_mac_address,
};
EXPORT_SYMBOL(tms380tr_netdev_ops);
int tmsdev_init(struct net_device *dev, struct device *pdev)
{
struct net_local *tms_local;
memset(netdev_priv(dev), 0, sizeof(struct net_local));
tms_local = netdev_priv(dev);
init_waitqueue_head(&tms_local->wait_for_tok_int);
if (pdev->dma_mask)
tms_local->dmalimit = *pdev->dma_mask;
else
return -ENOMEM;
tms_local->pdev = pdev;
tms_local->dmabuffer = dma_map_single(pdev, (void *)tms_local,
sizeof(struct net_local), DMA_BIDIRECTIONAL);
if (tms_local->dmabuffer + sizeof(struct net_local) >
tms_local->dmalimit)
{
printk(KERN_INFO "%s: Memory not accessible for DMA\n",
dev->name);
tmsdev_term(dev);
return -ENOMEM;
}
dev->netdev_ops = &tms380tr_netdev_ops;
dev->watchdog_timeo = HZ;
return 0;
}
EXPORT_SYMBOL(tms380tr_open);
EXPORT_SYMBOL(tms380tr_close);
EXPORT_SYMBOL(tms380tr_interrupt);
EXPORT_SYMBOL(tmsdev_init);
EXPORT_SYMBOL(tmsdev_term);
EXPORT_SYMBOL(tms380tr_wait);
#ifdef MODULE
static 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");