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alistair23-linux/drivers/net/tokenring/3c359.c
David Howells 7d12e780e0 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 15:10:12 +01:00

1831 lines
59 KiB
C
Raw Blame History

/*
* 3c359.c (c) 2000 Mike Phillips (mikep@linuxtr.net) All Rights Reserved
*
* Linux driver for 3Com 3c359 Tokenlink Velocity XL PCI NIC
*
* Base Driver Olympic:
* Written 1999 Peter De Schrijver & Mike Phillips
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* 7/17/00 - Clean up, version number 0.9.0. Ready to release to the world.
*
* 2/16/01 - Port up to kernel 2.4.2 ready for submission into the kernel.
* 3/05/01 - Last clean up stuff before submission.
* 2/15/01 - Finally, update to new pci api.
*
* To Do:
*/
/*
* Technical Card Details
*
* All access to data is done with 16/8 bit transfers. The transfer
* method really sucks. You can only read or write one location at a time.
*
* Also, the microcode for the card must be uploaded if the card does not have
* the flashrom on board. This is a 28K bloat in the driver when compiled
* as a module.
*
* Rx is very simple, status into a ring of descriptors, dma data transfer,
* interrupts to tell us when a packet is received.
*
* Tx is a little more interesting. Similar scenario, descriptor and dma data
* transfers, but we don't have to interrupt the card to tell it another packet
* is ready for transmission, we are just doing simple memory writes, not io or mmio
* writes. The card can be set up to simply poll on the next
* descriptor pointer and when this value is non-zero will automatically download
* the next packet. The card then interrupts us when the packet is done.
*
*/
#define XL_DEBUG 0
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/in.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/proc_fs.h>
#include <linux/ptrace.h>
#include <linux/skbuff.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/trdevice.h>
#include <linux/stddef.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>
#include <net/checksum.h>
#include <asm/io.h>
#include <asm/system.h>
#include "3c359.h"
static char version[] __devinitdata =
"3c359.c v1.2.0 2/17/01 - Mike Phillips (mikep@linuxtr.net)" ;
MODULE_AUTHOR("Mike Phillips <mikep@linuxtr.net>") ;
MODULE_DESCRIPTION("3Com 3C359 Velocity XL Token Ring Adapter Driver \n") ;
/* Module paramters */
/* Ring Speed 0,4,16
* 0 = Autosense
* 4,16 = Selected speed only, no autosense
* This allows the card to be the first on the ring
* and become the active monitor.
*
* WARNING: Some hubs will allow you to insert
* at the wrong speed.
*
* The adapter will _not_ fail to open if there are no
* active monitors on the ring, it will simply open up in
* its last known ringspeed if no ringspeed is specified.
*/
static int ringspeed[XL_MAX_ADAPTERS] = {0,} ;
module_param_array(ringspeed, int, NULL, 0);
MODULE_PARM_DESC(ringspeed,"3c359: Ringspeed selection - 4,16 or 0") ;
/* Packet buffer size */
static int pkt_buf_sz[XL_MAX_ADAPTERS] = {0,} ;
module_param_array(pkt_buf_sz, int, NULL, 0) ;
MODULE_PARM_DESC(pkt_buf_sz,"3c359: Initial buffer size") ;
/* Message Level */
static int message_level[XL_MAX_ADAPTERS] = {0,} ;
module_param_array(message_level, int, NULL, 0) ;
MODULE_PARM_DESC(message_level, "3c359: Level of reported messages \n") ;
/*
* This is a real nasty way of doing this, but otherwise you
* will be stuck with 1555 lines of hex #'s in the code.
*/
#include "3c359_microcode.h"
static struct pci_device_id xl_pci_tbl[] =
{
{PCI_VENDOR_ID_3COM,PCI_DEVICE_ID_3COM_3C359, PCI_ANY_ID, PCI_ANY_ID, },
{ } /* terminate list */
};
MODULE_DEVICE_TABLE(pci,xl_pci_tbl) ;
static int xl_init(struct net_device *dev);
static int xl_open(struct net_device *dev);
static int xl_open_hw(struct net_device *dev) ;
static int xl_hw_reset(struct net_device *dev);
static int xl_xmit(struct sk_buff *skb, struct net_device *dev);
static void xl_dn_comp(struct net_device *dev);
static int xl_close(struct net_device *dev);
static void xl_set_rx_mode(struct net_device *dev);
static irqreturn_t xl_interrupt(int irq, void *dev_id);
static struct net_device_stats * xl_get_stats(struct net_device *dev);
static int xl_set_mac_address(struct net_device *dev, void *addr) ;
static void xl_arb_cmd(struct net_device *dev);
static void xl_asb_cmd(struct net_device *dev) ;
static void xl_srb_cmd(struct net_device *dev, int srb_cmd) ;
static void xl_wait_misr_flags(struct net_device *dev) ;
static int xl_change_mtu(struct net_device *dev, int mtu);
static void xl_srb_bh(struct net_device *dev) ;
static void xl_asb_bh(struct net_device *dev) ;
static void xl_reset(struct net_device *dev) ;
static void xl_freemem(struct net_device *dev) ;
/* EEProm Access Functions */
static u16 xl_ee_read(struct net_device *dev, int ee_addr) ;
static void xl_ee_write(struct net_device *dev, int ee_addr, u16 ee_value) ;
/* Debugging functions */
#if XL_DEBUG
static void print_tx_state(struct net_device *dev) ;
static void print_rx_state(struct net_device *dev) ;
static void print_tx_state(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
struct xl_tx_desc *txd ;
u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
int i ;
printk("tx_ring_head: %d, tx_ring_tail: %d, free_ent: %d \n",xl_priv->tx_ring_head,
xl_priv->tx_ring_tail, xl_priv->free_ring_entries) ;
printk("Ring , Address , FSH , DnNextPtr, Buffer, Buffer_Len \n");
for (i = 0; i < 16; i++) {
txd = &(xl_priv->xl_tx_ring[i]) ;
printk("%d, %08lx, %08x, %08x, %08x, %08x \n", i, virt_to_bus(txd),
txd->framestartheader, txd->dnnextptr, txd->buffer, txd->buffer_length ) ;
}
printk("DNLISTPTR = %04x \n", readl(xl_mmio + MMIO_DNLISTPTR) );
printk("DmaCtl = %04x \n", readl(xl_mmio + MMIO_DMA_CTRL) );
printk("Queue status = %0x \n",netif_running(dev) ) ;
}
static void print_rx_state(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
struct xl_rx_desc *rxd ;
u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
int i ;
printk("rx_ring_tail: %d \n", xl_priv->rx_ring_tail) ;
printk("Ring , Address , FrameState , UPNextPtr, FragAddr, Frag_Len \n");
for (i = 0; i < 16; i++) {
/* rxd = (struct xl_rx_desc *)xl_priv->rx_ring_dma_addr + (i * sizeof(struct xl_rx_desc)) ; */
rxd = &(xl_priv->xl_rx_ring[i]) ;
printk("%d, %08lx, %08x, %08x, %08x, %08x \n", i, virt_to_bus(rxd),
rxd->framestatus, rxd->upnextptr, rxd->upfragaddr, rxd->upfraglen ) ;
}
printk("UPLISTPTR = %04x \n", readl(xl_mmio + MMIO_UPLISTPTR) );
printk("DmaCtl = %04x \n", readl(xl_mmio + MMIO_DMA_CTRL) );
printk("Queue status = %0x \n",netif_running(dev) ) ;
}
#endif
/*
* Read values from the on-board EEProm. This looks very strange
* but you have to wait for the EEProm to get/set the value before
* passing/getting the next value from the nic. As with all requests
* on this nic it has to be done in two stages, a) tell the nic which
* memory address you want to access and b) pass/get the value from the nic.
* With the EEProm, you have to wait before and inbetween access a) and b).
* As this is only read at initialization time and the wait period is very
* small we shouldn't have to worry about scheduling issues.
*/
static u16 xl_ee_read(struct net_device *dev, int ee_addr)
{
struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
/* Wait for EEProm to not be busy */
writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
/* Tell EEProm what we want to do and where */
writel(IO_WORD_WRITE | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(EEREAD + ee_addr, xl_mmio + MMIO_MACDATA) ;
/* Wait for EEProm to not be busy */
writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
/* Tell EEProm what we want to do and where */
writel(IO_WORD_WRITE | EECONTROL , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(EEREAD + ee_addr, xl_mmio + MMIO_MACDATA) ;
/* Finally read the value from the EEProm */
writel(IO_WORD_READ | EEDATA , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
return readw(xl_mmio + MMIO_MACDATA) ;
}
/*
* Write values to the onboard eeprom. As with eeprom read you need to
* set which location to write, wait, value to write, wait, with the
* added twist of having to enable eeprom writes as well.
*/
static void xl_ee_write(struct net_device *dev, int ee_addr, u16 ee_value)
{
struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
/* Wait for EEProm to not be busy */
writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
/* Enable write/erase */
writel(IO_WORD_WRITE | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(EE_ENABLE_WRITE, xl_mmio + MMIO_MACDATA) ;
/* Wait for EEProm to not be busy */
writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
/* Put the value we want to write into EEDATA */
writel(IO_WORD_WRITE | EEDATA, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(ee_value, xl_mmio + MMIO_MACDATA) ;
/* Tell EEProm to write eevalue into ee_addr */
writel(IO_WORD_WRITE | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(EEWRITE + ee_addr, xl_mmio + MMIO_MACDATA) ;
/* Wait for EEProm to not be busy, to ensure write gets done */
writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
return ;
}
static int __devinit xl_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct net_device *dev ;
struct xl_private *xl_priv ;
static int card_no = -1 ;
int i ;
card_no++ ;
if (pci_enable_device(pdev)) {
return -ENODEV ;
}
pci_set_master(pdev);
if ((i = pci_request_regions(pdev,"3c359"))) {
return i ;
} ;
/*
* Allowing init_trdev to allocate the dev->priv structure will align xl_private
* on a 32 bytes boundary which we need for the rx/tx descriptors
*/
dev = alloc_trdev(sizeof(struct xl_private)) ;
if (!dev) {
pci_release_regions(pdev) ;
return -ENOMEM ;
}
xl_priv = dev->priv ;
#if XL_DEBUG
printk("pci_device: %p, dev:%p, dev->priv: %p, ba[0]: %10x, ba[1]:%10x\n",
pdev, dev, dev->priv, (unsigned int)pdev->resource[0].start, (unsigned int)pdev->resource[1].start) ;
#endif
dev->irq=pdev->irq;
dev->base_addr=pci_resource_start(pdev,0) ;
xl_priv->xl_card_name = pci_name(pdev);
xl_priv->xl_mmio=ioremap(pci_resource_start(pdev,1), XL_IO_SPACE);
xl_priv->pdev = pdev ;
if ((pkt_buf_sz[card_no] < 100) || (pkt_buf_sz[card_no] > 18000) )
xl_priv->pkt_buf_sz = PKT_BUF_SZ ;
else
xl_priv->pkt_buf_sz = pkt_buf_sz[card_no] ;
dev->mtu = xl_priv->pkt_buf_sz - TR_HLEN ;
xl_priv->xl_ring_speed = ringspeed[card_no] ;
xl_priv->xl_message_level = message_level[card_no] ;
xl_priv->xl_functional_addr[0] = xl_priv->xl_functional_addr[1] = xl_priv->xl_functional_addr[2] = xl_priv->xl_functional_addr[3] = 0 ;
xl_priv->xl_copy_all_options = 0 ;
if((i = xl_init(dev))) {
iounmap(xl_priv->xl_mmio) ;
free_netdev(dev) ;
pci_release_regions(pdev) ;
return i ;
}
dev->open=&xl_open;
dev->hard_start_xmit=&xl_xmit;
dev->change_mtu=&xl_change_mtu;
dev->stop=&xl_close;
dev->do_ioctl=NULL;
dev->set_multicast_list=&xl_set_rx_mode;
dev->get_stats=&xl_get_stats ;
dev->set_mac_address=&xl_set_mac_address ;
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
pci_set_drvdata(pdev,dev) ;
if ((i = register_netdev(dev))) {
printk(KERN_ERR "3C359, register netdev failed\n") ;
pci_set_drvdata(pdev,NULL) ;
iounmap(xl_priv->xl_mmio) ;
free_netdev(dev) ;
pci_release_regions(pdev) ;
return i ;
}
printk(KERN_INFO "3C359: %s registered as: %s\n",xl_priv->xl_card_name,dev->name) ;
return 0;
}
static int __init xl_init(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
printk(KERN_INFO "%s \n", version);
printk(KERN_INFO "%s: I/O at %hx, MMIO at %p, using irq %d\n",
xl_priv->xl_card_name, (unsigned int)dev->base_addr ,xl_priv->xl_mmio, dev->irq);
spin_lock_init(&xl_priv->xl_lock) ;
return xl_hw_reset(dev) ;
}
/*
* Hardware reset. This needs to be a separate entity as we need to reset the card
* when we change the EEProm settings.
*/
static int xl_hw_reset(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
unsigned long t ;
u16 i ;
u16 result_16 ;
u8 result_8 ;
u16 start ;
int j ;
/*
* Reset the card. If the card has got the microcode on board, we have
* missed the initialization interrupt, so we must always do this.
*/
writew( GLOBAL_RESET, xl_mmio + MMIO_COMMAND ) ;
/*
* Must wait for cmdInProgress bit (12) to clear before continuing with
* card configuration.
*/
t=jiffies;
while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
schedule();
if(jiffies-t > 40*HZ) {
printk(KERN_ERR "%s: 3COM 3C359 Velocity XL card not responding to global reset.\n", dev->name);
return -ENODEV;
}
}
/*
* Enable pmbar by setting bit in CPAttention
*/
writel( (IO_BYTE_READ | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
result_8 = readb(xl_mmio + MMIO_MACDATA) ;
result_8 = result_8 | CPA_PMBARVIS ;
writel( (IO_BYTE_WRITE | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(result_8, xl_mmio + MMIO_MACDATA) ;
/*
* Read cpHold bit in pmbar, if cleared we have got Flashrom on board.
* If not, we need to upload the microcode to the card
*/
writel( (IO_WORD_READ | PMBAR),xl_mmio + MMIO_MAC_ACCESS_CMD);
#if XL_DEBUG
printk(KERN_INFO "Read from PMBAR = %04x \n", readw(xl_mmio + MMIO_MACDATA)) ;
#endif
if ( readw( (xl_mmio + MMIO_MACDATA)) & PMB_CPHOLD ) {
/* Set PmBar, privateMemoryBase bits (8:2) to 0 */
writel( (IO_WORD_READ | PMBAR),xl_mmio + MMIO_MAC_ACCESS_CMD);
result_16 = readw(xl_mmio + MMIO_MACDATA) ;
result_16 = result_16 & ~((0x7F) << 2) ;
writel( (IO_WORD_WRITE | PMBAR), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(result_16,xl_mmio + MMIO_MACDATA) ;
/* Set CPAttention, memWrEn bit */
writel( (IO_BYTE_READ | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
result_8 = readb(xl_mmio + MMIO_MACDATA) ;
result_8 = result_8 | CPA_MEMWREN ;
writel( (IO_BYTE_WRITE | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(result_8, xl_mmio + MMIO_MACDATA) ;
/*
* Now to write the microcode into the shared ram
* The microcode must finish at position 0xFFFF, so we must subtract
* to get the start position for the code
*/
start = (0xFFFF - (mc_size) + 1 ) ; /* Looks strange but ensures compiler only uses 16 bit unsigned int for this */
printk(KERN_INFO "3C359: Uploading Microcode: ");
for (i = start, j = 0; j < mc_size; i++, j++) {
writel(MEM_BYTE_WRITE | 0XD0000 | i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(microcode[j],xl_mmio + MMIO_MACDATA) ;
if (j % 1024 == 0)
printk(".");
}
printk("\n") ;
for (i=0;i < 16; i++) {
writel( (MEM_BYTE_WRITE | 0xDFFF0) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(microcode[mc_size - 16 + i], xl_mmio + MMIO_MACDATA) ;
}
/*
* Have to write the start address of the upload to FFF4, but
* the address must be >> 4. You do not want to know how long
* it took me to discover this.
*/
writel(MEM_WORD_WRITE | 0xDFFF4, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(start >> 4, xl_mmio + MMIO_MACDATA);
/* Clear the CPAttention, memWrEn Bit */
writel( (IO_BYTE_READ | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
result_8 = readb(xl_mmio + MMIO_MACDATA) ;
result_8 = result_8 & ~CPA_MEMWREN ;
writel( (IO_BYTE_WRITE | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(result_8, xl_mmio + MMIO_MACDATA) ;
/* Clear the cpHold bit in pmbar */
writel( (IO_WORD_READ | PMBAR),xl_mmio + MMIO_MAC_ACCESS_CMD);
result_16 = readw(xl_mmio + MMIO_MACDATA) ;
result_16 = result_16 & ~PMB_CPHOLD ;
writel( (IO_WORD_WRITE | PMBAR), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(result_16,xl_mmio + MMIO_MACDATA) ;
} /* If microcode upload required */
/*
* The card should now go though a self test procedure and get itself ready
* to be opened, we must wait for an srb response with the initialization
* information.
*/
#if XL_DEBUG
printk(KERN_INFO "%s: Microcode uploaded, must wait for the self test to complete\n", dev->name);
#endif
writew(SETINDENABLE | 0xFFF, xl_mmio + MMIO_COMMAND) ;
t=jiffies;
while ( !(readw(xl_mmio + MMIO_INTSTATUS_AUTO) & INTSTAT_SRB) ) {
schedule();
if(jiffies-t > 15*HZ) {
printk(KERN_ERR "3COM 3C359 Velocity XL card not responding.\n");
return -ENODEV;
}
}
/*
* Write the RxBufArea with D000, RxEarlyThresh, TxStartThresh,
* DnPriReqThresh, read the tech docs if you want to know what
* values they need to be.
*/
writel(MMIO_WORD_WRITE | RXBUFAREA, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(0xD000, xl_mmio + MMIO_MACDATA) ;
writel(MMIO_WORD_WRITE | RXEARLYTHRESH, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(0X0020, xl_mmio + MMIO_MACDATA) ;
writew( SETTXSTARTTHRESH | 0x40 , xl_mmio + MMIO_COMMAND) ;
writeb(0x04, xl_mmio + MMIO_DNBURSTTHRESH) ;
writeb(0x04, xl_mmio + DNPRIREQTHRESH) ;
/*
* Read WRBR to provide the location of the srb block, have to use byte reads not word reads.
* Tech docs have this wrong !!!!
*/
writel(MMIO_BYTE_READ | WRBR, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
xl_priv->srb = readb(xl_mmio + MMIO_MACDATA) << 8 ;
writel( (MMIO_BYTE_READ | WRBR) + 1, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
xl_priv->srb = xl_priv->srb | readb(xl_mmio + MMIO_MACDATA) ;
#if XL_DEBUG
writel(IO_WORD_READ | SWITCHSETTINGS, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
if ( readw(xl_mmio + MMIO_MACDATA) & 2) {
printk(KERN_INFO "Default ring speed 4 mbps \n") ;
} else {
printk(KERN_INFO "Default ring speed 16 mbps \n") ;
}
printk(KERN_INFO "%s: xl_priv->srb = %04x\n",xl_priv->xl_card_name, xl_priv->srb);
#endif
return 0;
}
static int xl_open(struct net_device *dev)
{
struct xl_private *xl_priv=(struct xl_private *)dev->priv;
u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
u8 i ;
u16 hwaddr[3] ; /* Should be u8[6] but we get word return values */
int open_err ;
u16 switchsettings, switchsettings_eeprom ;
if(request_irq(dev->irq, &xl_interrupt, IRQF_SHARED , "3c359", dev)) {
return -EAGAIN;
}
/*
* Read the information from the EEPROM that we need. I know we
* should use ntohs, but the word gets stored reversed in the 16
* bit field anyway and it all works its self out when we memcpy
* it into dev->dev_addr.
*/
hwaddr[0] = xl_ee_read(dev,0x10) ;
hwaddr[1] = xl_ee_read(dev,0x11) ;
hwaddr[2] = xl_ee_read(dev,0x12) ;
/* Ring speed */
switchsettings_eeprom = xl_ee_read(dev,0x08) ;
switchsettings = switchsettings_eeprom ;
if (xl_priv->xl_ring_speed != 0) {
if (xl_priv->xl_ring_speed == 4)
switchsettings = switchsettings | 0x02 ;
else
switchsettings = switchsettings & ~0x02 ;
}
/* Only write EEProm if there has been a change */
if (switchsettings != switchsettings_eeprom) {
xl_ee_write(dev,0x08,switchsettings) ;
/* Hardware reset after changing EEProm */
xl_hw_reset(dev) ;
}
memcpy(dev->dev_addr,hwaddr,dev->addr_len) ;
open_err = xl_open_hw(dev) ;
/*
* This really needs to be cleaned up with better error reporting.
*/
if (open_err != 0) { /* Something went wrong with the open command */
if (open_err & 0x07) { /* Wrong speed, retry at different speed */
printk(KERN_WARNING "%s: Open Error, retrying at different ringspeed \n", dev->name) ;
switchsettings = switchsettings ^ 2 ;
xl_ee_write(dev,0x08,switchsettings) ;
xl_hw_reset(dev) ;
open_err = xl_open_hw(dev) ;
if (open_err != 0) {
printk(KERN_WARNING "%s: Open error returned a second time, we're bombing out now\n", dev->name);
free_irq(dev->irq,dev) ;
return -ENODEV ;
}
} else {
printk(KERN_WARNING "%s: Open Error = %04x\n", dev->name, open_err) ;
free_irq(dev->irq,dev) ;
return -ENODEV ;
}
}
/*
* Now to set up the Rx and Tx buffer structures
*/
/* These MUST be on 8 byte boundaries */
xl_priv->xl_tx_ring = kmalloc((sizeof(struct xl_tx_desc) * XL_TX_RING_SIZE) + 7, GFP_DMA | GFP_KERNEL) ;
if (xl_priv->xl_tx_ring == NULL) {
printk(KERN_WARNING "%s: Not enough memory to allocate rx buffers.\n",
dev->name);
free_irq(dev->irq,dev);
return -ENOMEM;
}
xl_priv->xl_rx_ring = kmalloc((sizeof(struct xl_rx_desc) * XL_RX_RING_SIZE) +7, GFP_DMA | GFP_KERNEL) ;
if (xl_priv->xl_tx_ring == NULL) {
printk(KERN_WARNING "%s: Not enough memory to allocate rx buffers.\n",
dev->name);
free_irq(dev->irq,dev);
kfree(xl_priv->xl_tx_ring);
return -ENOMEM;
}
memset(xl_priv->xl_tx_ring,0,sizeof(struct xl_tx_desc) * XL_TX_RING_SIZE) ;
memset(xl_priv->xl_rx_ring,0,sizeof(struct xl_rx_desc) * XL_RX_RING_SIZE) ;
/* Setup Rx Ring */
for (i=0 ; i < XL_RX_RING_SIZE ; i++) {
struct sk_buff *skb ;
skb = dev_alloc_skb(xl_priv->pkt_buf_sz) ;
if (skb==NULL)
break ;
skb->dev = dev ;
xl_priv->xl_rx_ring[i].upfragaddr = pci_map_single(xl_priv->pdev, skb->data,xl_priv->pkt_buf_sz, PCI_DMA_FROMDEVICE) ;
xl_priv->xl_rx_ring[i].upfraglen = xl_priv->pkt_buf_sz | RXUPLASTFRAG;
xl_priv->rx_ring_skb[i] = skb ;
}
if (i==0) {
printk(KERN_WARNING "%s: Not enough memory to allocate rx buffers. Adapter disabled \n",dev->name) ;
free_irq(dev->irq,dev) ;
return -EIO ;
}
xl_priv->rx_ring_no = i ;
xl_priv->rx_ring_tail = 0 ;
xl_priv->rx_ring_dma_addr = pci_map_single(xl_priv->pdev,xl_priv->xl_rx_ring, sizeof(struct xl_rx_desc) * XL_RX_RING_SIZE, PCI_DMA_TODEVICE) ;
for (i=0;i<(xl_priv->rx_ring_no-1);i++) {
xl_priv->xl_rx_ring[i].upnextptr = xl_priv->rx_ring_dma_addr + (sizeof (struct xl_rx_desc) * (i+1)) ;
}
xl_priv->xl_rx_ring[i].upnextptr = 0 ;
writel(xl_priv->rx_ring_dma_addr, xl_mmio + MMIO_UPLISTPTR) ;
/* Setup Tx Ring */
xl_priv->tx_ring_dma_addr = pci_map_single(xl_priv->pdev,xl_priv->xl_tx_ring, sizeof(struct xl_tx_desc) * XL_TX_RING_SIZE,PCI_DMA_TODEVICE) ;
xl_priv->tx_ring_head = 1 ;
xl_priv->tx_ring_tail = 255 ; /* Special marker for first packet */
xl_priv->free_ring_entries = XL_TX_RING_SIZE ;
/*
* Setup the first dummy DPD entry for polling to start working.
*/
xl_priv->xl_tx_ring[0].framestartheader = TXDPDEMPTY ;
xl_priv->xl_tx_ring[0].buffer = 0 ;
xl_priv->xl_tx_ring[0].buffer_length = 0 ;
xl_priv->xl_tx_ring[0].dnnextptr = 0 ;
writel(xl_priv->tx_ring_dma_addr, xl_mmio + MMIO_DNLISTPTR) ;
writel(DNUNSTALL, xl_mmio + MMIO_COMMAND) ;
writel(UPUNSTALL, xl_mmio + MMIO_COMMAND) ;
writel(DNENABLE, xl_mmio + MMIO_COMMAND) ;
writeb(0x40, xl_mmio + MMIO_DNPOLL) ;
/*
* Enable interrupts on the card
*/
writel(SETINTENABLE | INT_MASK, xl_mmio + MMIO_COMMAND) ;
writel(SETINDENABLE | INT_MASK, xl_mmio + MMIO_COMMAND) ;
netif_start_queue(dev) ;
return 0;
}
static int xl_open_hw(struct net_device *dev)
{
struct xl_private *xl_priv=(struct xl_private *)dev->priv;
u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
u16 vsoff ;
char ver_str[33];
int open_err ;
int i ;
unsigned long t ;
/*
* Okay, let's build up the Open.NIC srb command
*
*/
writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(OPEN_NIC, xl_mmio + MMIO_MACDATA) ;
/*
* Use this as a test byte, if it comes back with the same value, the command didn't work
*/
writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb)+ 2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(0xff,xl_mmio + MMIO_MACDATA) ;
/* Open options */
writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + 8, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(0x00, xl_mmio + MMIO_MACDATA) ;
writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + 9, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(0x00, xl_mmio + MMIO_MACDATA) ;
/*
* Node address, be careful here, the docs say you can just put zeros here and it will use
* the hardware address, it doesn't, you must include the node address in the open command.
*/
if (xl_priv->xl_laa[0]) { /* If using a LAA address */
for (i=10;i<16;i++) {
writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(xl_priv->xl_laa[i],xl_mmio + MMIO_MACDATA) ;
}
memcpy(dev->dev_addr,xl_priv->xl_laa,dev->addr_len) ;
} else { /* Regular hardware address */
for (i=10;i<16;i++) {
writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(dev->dev_addr[i-10], xl_mmio + MMIO_MACDATA) ;
}
}
/* Default everything else to 0 */
for (i = 16; i < 34; i++) {
writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(0x00,xl_mmio + MMIO_MACDATA) ;
}
/*
* Set the csrb bit in the MISR register
*/
xl_wait_misr_flags(dev) ;
writel(MEM_BYTE_WRITE | MF_CSRB, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(0xFF, xl_mmio + MMIO_MACDATA) ;
writel(MMIO_BYTE_WRITE | MISR_SET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(MISR_CSRB , xl_mmio + MMIO_MACDATA) ;
/*
* Now wait for the command to run
*/
t=jiffies;
while (! (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_SRB)) {
schedule();
if(jiffies-t > 40*HZ) {
printk(KERN_ERR "3COM 3C359 Velocity XL card not responding.\n");
break ;
}
}
/*
* Let's interpret the open response
*/
writel( (MEM_BYTE_READ | 0xD0000 | xl_priv->srb)+2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
if (readb(xl_mmio + MMIO_MACDATA)!=0) {
open_err = readb(xl_mmio + MMIO_MACDATA) << 8 ;
writel( (MEM_BYTE_READ | 0xD0000 | xl_priv->srb) + 7, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
open_err |= readb(xl_mmio + MMIO_MACDATA) ;
return open_err ;
} else {
writel( (MEM_WORD_READ | 0xD0000 | xl_priv->srb) + 8, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
xl_priv->asb = ntohs(readw(xl_mmio + MMIO_MACDATA)) ;
printk(KERN_INFO "%s: Adapter Opened Details: ",dev->name) ;
printk("ASB: %04x",xl_priv->asb ) ;
writel( (MEM_WORD_READ | 0xD0000 | xl_priv->srb) + 10, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
printk(", SRB: %04x",ntohs(readw(xl_mmio + MMIO_MACDATA)) ) ;
writel( (MEM_WORD_READ | 0xD0000 | xl_priv->srb) + 12, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
xl_priv->arb = ntohs(readw(xl_mmio + MMIO_MACDATA)) ;
printk(", ARB: %04x \n",xl_priv->arb ) ;
writel( (MEM_WORD_READ | 0xD0000 | xl_priv->srb) + 14, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
vsoff = ntohs(readw(xl_mmio + MMIO_MACDATA)) ;
/*
* Interesting, sending the individual characters directly to printk was causing klogd to use
* use 100% of processor time, so we build up the string and print that instead.
*/
for (i=0;i<0x20;i++) {
writel( (MEM_BYTE_READ | 0xD0000 | vsoff) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
ver_str[i] = readb(xl_mmio + MMIO_MACDATA) ;
}
ver_str[i] = '\0' ;
printk(KERN_INFO "%s: Microcode version String: %s \n",dev->name,ver_str);
}
/*
* Issue the AckInterrupt
*/
writew(ACK_INTERRUPT | SRBRACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
return 0 ;
}
/*
* There are two ways of implementing rx on the 359 NIC, either
* interrupt driven or polling. We are going to uses interrupts,
* it is the easier way of doing things.
*
* The Rx works with a ring of Rx descriptors. At initialise time the ring
* entries point to the next entry except for the last entry in the ring
* which points to 0. The card is programmed with the location of the first
* available descriptor and keeps reading the next_ptr until next_ptr is set
* to 0. Hopefully with a ring size of 16 the card will never get to read a next_ptr
* of 0. As the Rx interrupt is received we copy the frame up to the protocol layers
* and then point the end of the ring to our current position and point our current
* position to 0, therefore making the current position the last position on the ring.
* The last position on the ring therefore loops continually loops around the rx ring.
*
* rx_ring_tail is the position on the ring to process next. (Think of a snake, the head
* expands as the card adds new packets and we go around eating the tail processing the
* packets.)
*
* Undoubtably it could be streamlined and improved upon, but at the moment it works
* and the fast path through the routine is fine.
*
* adv_rx_ring could be inlined to increase performance, but its called a *lot* of times
* in xl_rx so would increase the size of the function significantly.
*/
static void adv_rx_ring(struct net_device *dev) /* Advance rx_ring, cut down on bloat in xl_rx */
{
struct xl_private *xl_priv=(struct xl_private *)dev->priv;
int prev_ring_loc ;
prev_ring_loc = (xl_priv->rx_ring_tail + XL_RX_RING_SIZE - 1) & (XL_RX_RING_SIZE - 1);
xl_priv->xl_rx_ring[prev_ring_loc].upnextptr = xl_priv->rx_ring_dma_addr + (sizeof (struct xl_rx_desc) * xl_priv->rx_ring_tail) ;
xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].framestatus = 0 ;
xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upnextptr = 0 ;
xl_priv->rx_ring_tail++ ;
xl_priv->rx_ring_tail &= (XL_RX_RING_SIZE-1) ;
return ;
}
static void xl_rx(struct net_device *dev)
{
struct xl_private *xl_priv=(struct xl_private *)dev->priv;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
struct sk_buff *skb, *skb2 ;
int frame_length = 0, copy_len = 0 ;
int temp_ring_loc ;
/*
* Receive the next frame, loop around the ring until all frames
* have been received.
*/
while (xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].framestatus & (RXUPDCOMPLETE | RXUPDFULL) ) { /* Descriptor to process */
if (xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].framestatus & RXUPDFULL ) { /* UpdFull, Multiple Descriptors used for the frame */
/*
* This is a pain, you need to go through all the descriptors until the last one
* for this frame to find the framelength
*/
temp_ring_loc = xl_priv->rx_ring_tail ;
while (xl_priv->xl_rx_ring[temp_ring_loc].framestatus & RXUPDFULL ) {
temp_ring_loc++ ;
temp_ring_loc &= (XL_RX_RING_SIZE-1) ;
}
frame_length = xl_priv->xl_rx_ring[temp_ring_loc].framestatus & 0x7FFF ;
skb = dev_alloc_skb(frame_length) ;
if (skb==NULL) { /* No memory for frame, still need to roll forward the rx ring */
printk(KERN_WARNING "%s: dev_alloc_skb failed - multi buffer !\n", dev->name) ;
while (xl_priv->rx_ring_tail != temp_ring_loc)
adv_rx_ring(dev) ;
adv_rx_ring(dev) ; /* One more time just for luck :) */
xl_priv->xl_stats.rx_dropped++ ;
writel(ACK_INTERRUPT | UPCOMPACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
return ;
}
skb->dev = dev ;
while (xl_priv->rx_ring_tail != temp_ring_loc) {
copy_len = xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfraglen & 0x7FFF ;
frame_length -= copy_len ;
pci_dma_sync_single_for_cpu(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
memcpy(skb_put(skb,copy_len), xl_priv->rx_ring_skb[xl_priv->rx_ring_tail]->data, copy_len) ;
pci_dma_sync_single_for_device(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
adv_rx_ring(dev) ;
}
/* Now we have found the last fragment */
pci_dma_sync_single_for_cpu(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
memcpy(skb_put(skb,copy_len), xl_priv->rx_ring_skb[xl_priv->rx_ring_tail]->data, frame_length) ;
/* memcpy(skb_put(skb,frame_length), bus_to_virt(xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr), frame_length) ; */
pci_dma_sync_single_for_device(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
adv_rx_ring(dev) ;
skb->protocol = tr_type_trans(skb,dev) ;
netif_rx(skb) ;
} else { /* Single Descriptor Used, simply swap buffers over, fast path */
frame_length = xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].framestatus & 0x7FFF ;
skb = dev_alloc_skb(xl_priv->pkt_buf_sz) ;
if (skb==NULL) { /* Still need to fix the rx ring */
printk(KERN_WARNING "%s: dev_alloc_skb failed in rx, single buffer \n",dev->name) ;
adv_rx_ring(dev) ;
xl_priv->xl_stats.rx_dropped++ ;
writel(ACK_INTERRUPT | UPCOMPACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
return ;
}
skb->dev = dev ;
skb2 = xl_priv->rx_ring_skb[xl_priv->rx_ring_tail] ;
pci_unmap_single(xl_priv->pdev, xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr, xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
skb_put(skb2, frame_length) ;
skb2->protocol = tr_type_trans(skb2,dev) ;
xl_priv->rx_ring_skb[xl_priv->rx_ring_tail] = skb ;
xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr = pci_map_single(xl_priv->pdev,skb->data,xl_priv->pkt_buf_sz, PCI_DMA_FROMDEVICE) ;
xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfraglen = xl_priv->pkt_buf_sz | RXUPLASTFRAG ;
adv_rx_ring(dev) ;
xl_priv->xl_stats.rx_packets++ ;
xl_priv->xl_stats.rx_bytes += frame_length ;
netif_rx(skb2) ;
} /* if multiple buffers */
dev->last_rx = jiffies ;
} /* while packet to do */
/* Clear the updComplete interrupt */
writel(ACK_INTERRUPT | UPCOMPACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
return ;
}
/*
* This is ruthless, it doesn't care what state the card is in it will
* completely reset the adapter.
*/
static void xl_reset(struct net_device *dev)
{
struct xl_private *xl_priv=(struct xl_private *)dev->priv;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
unsigned long t;
writew( GLOBAL_RESET, xl_mmio + MMIO_COMMAND ) ;
/*
* Must wait for cmdInProgress bit (12) to clear before continuing with
* card configuration.
*/
t=jiffies;
while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
if(jiffies-t > 40*HZ) {
printk(KERN_ERR "3COM 3C359 Velocity XL card not responding.\n");
break ;
}
}
}
static void xl_freemem(struct net_device *dev)
{
struct xl_private *xl_priv=(struct xl_private *)dev->priv ;
int i ;
for (i=0;i<XL_RX_RING_SIZE;i++) {
dev_kfree_skb_irq(xl_priv->rx_ring_skb[xl_priv->rx_ring_tail]) ;
pci_unmap_single(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz, PCI_DMA_FROMDEVICE) ;
xl_priv->rx_ring_tail++ ;
xl_priv->rx_ring_tail &= XL_RX_RING_SIZE-1;
}
/* unmap ring */
pci_unmap_single(xl_priv->pdev,xl_priv->rx_ring_dma_addr, sizeof(struct xl_rx_desc) * XL_RX_RING_SIZE, PCI_DMA_FROMDEVICE) ;
pci_unmap_single(xl_priv->pdev,xl_priv->tx_ring_dma_addr, sizeof(struct xl_tx_desc) * XL_TX_RING_SIZE, PCI_DMA_TODEVICE) ;
kfree(xl_priv->xl_rx_ring) ;
kfree(xl_priv->xl_tx_ring) ;
return ;
}
static irqreturn_t xl_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct xl_private *xl_priv =(struct xl_private *)dev->priv;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
u16 intstatus, macstatus ;
if (!dev) {
printk(KERN_WARNING "Device structure dead, aaahhhh !\n") ;
return IRQ_NONE;
}
intstatus = readw(xl_mmio + MMIO_INTSTATUS) ;
if (!(intstatus & 1)) /* We didn't generate the interrupt */
return IRQ_NONE;
spin_lock(&xl_priv->xl_lock) ;
/*
* Process the interrupt
*/
/*
* Something fishy going on here, we shouldn't get 0001 ints, not fatal though.
*/
if (intstatus == 0x0001) {
writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
printk(KERN_INFO "%s: 00001 int received \n",dev->name) ;
} else {
if (intstatus & (HOSTERRINT | SRBRINT | ARBCINT | UPCOMPINT | DNCOMPINT | HARDERRINT | (1<<8) | TXUNDERRUN | ASBFINT)) {
/*
* Host Error.
* It may be possible to recover from this, but usually it means something
* is seriously fubar, so we just close the adapter.
*/
if (intstatus & HOSTERRINT) {
printk(KERN_WARNING "%s: Host Error, performing global reset, intstatus = %04x \n",dev->name,intstatus) ;
writew( GLOBAL_RESET, xl_mmio + MMIO_COMMAND ) ;
printk(KERN_WARNING "%s: Resetting hardware: \n", dev->name);
netif_stop_queue(dev) ;
xl_freemem(dev) ;
free_irq(dev->irq,dev);
xl_reset(dev) ;
writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
spin_unlock(&xl_priv->xl_lock) ;
return IRQ_HANDLED;
} /* Host Error */
if (intstatus & SRBRINT ) { /* Srbc interrupt */
writel(ACK_INTERRUPT | SRBRACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
if (xl_priv->srb_queued)
xl_srb_bh(dev) ;
} /* SRBR Interrupt */
if (intstatus & TXUNDERRUN) { /* Issue DnReset command */
writel(DNRESET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) { /* Wait for command to run */
/* !!! FIX-ME !!!!
Must put a timeout check here ! */
/* Empty Loop */
}
printk(KERN_WARNING "%s: TX Underrun received \n",dev->name) ;
writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
} /* TxUnderRun */
if (intstatus & ARBCINT ) { /* Arbc interrupt */
xl_arb_cmd(dev) ;
} /* Arbc */
if (intstatus & ASBFINT) {
if (xl_priv->asb_queued == 1) {
xl_asb_cmd(dev) ;
} else if (xl_priv->asb_queued == 2) {
xl_asb_bh(dev) ;
} else {
writel(ACK_INTERRUPT | LATCH_ACK | ASBFACK, xl_mmio + MMIO_COMMAND) ;
}
} /* Asbf */
if (intstatus & UPCOMPINT ) /* UpComplete */
xl_rx(dev) ;
if (intstatus & DNCOMPINT ) /* DnComplete */
xl_dn_comp(dev) ;
if (intstatus & HARDERRINT ) { /* Hardware error */
writel(MMIO_WORD_READ | MACSTATUS, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
macstatus = readw(xl_mmio + MMIO_MACDATA) ;
printk(KERN_WARNING "%s: MacStatusError, details: ", dev->name);
if (macstatus & (1<<14))
printk(KERN_WARNING "tchk error: Unrecoverable error \n") ;
if (macstatus & (1<<3))
printk(KERN_WARNING "eint error: Internal watchdog timer expired \n") ;
if (macstatus & (1<<2))
printk(KERN_WARNING "aint error: Host tried to perform invalid operation \n") ;
printk(KERN_WARNING "Instatus = %02x, macstatus = %02x\n",intstatus,macstatus) ;
printk(KERN_WARNING "%s: Resetting hardware: \n", dev->name);
netif_stop_queue(dev) ;
xl_freemem(dev) ;
free_irq(dev->irq,dev);
unregister_netdev(dev) ;
free_netdev(dev) ;
xl_reset(dev) ;
writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
spin_unlock(&xl_priv->xl_lock) ;
return IRQ_HANDLED;
}
} else {
printk(KERN_WARNING "%s: Received Unknown interrupt : %04x \n", dev->name, intstatus) ;
writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
}
}
/* Turn interrupts back on */
writel( SETINDENABLE | INT_MASK, xl_mmio + MMIO_COMMAND) ;
writel( SETINTENABLE | INT_MASK, xl_mmio + MMIO_COMMAND) ;
spin_unlock(&xl_priv->xl_lock) ;
return IRQ_HANDLED;
}
/*
* Tx - Polling configuration
*/
static int xl_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct xl_private *xl_priv=(struct xl_private *)dev->priv;
struct xl_tx_desc *txd ;
int tx_head, tx_tail, tx_prev ;
unsigned long flags ;
spin_lock_irqsave(&xl_priv->xl_lock,flags) ;
netif_stop_queue(dev) ;
if (xl_priv->free_ring_entries > 1 ) {
/*
* Set up the descriptor for the packet
*/
tx_head = xl_priv->tx_ring_head ;
tx_tail = xl_priv->tx_ring_tail ;
txd = &(xl_priv->xl_tx_ring[tx_head]) ;
txd->dnnextptr = 0 ;
txd->framestartheader = skb->len | TXDNINDICATE ;
txd->buffer = pci_map_single(xl_priv->pdev, skb->data, skb->len, PCI_DMA_TODEVICE) ;
txd->buffer_length = skb->len | TXDNFRAGLAST ;
xl_priv->tx_ring_skb[tx_head] = skb ;
xl_priv->xl_stats.tx_packets++ ;
xl_priv->xl_stats.tx_bytes += skb->len ;
/*
* Set the nextptr of the previous descriptor equal to this descriptor, add XL_TX_RING_SIZE -1
* to ensure no negative numbers in unsigned locations.
*/
tx_prev = (xl_priv->tx_ring_head + XL_TX_RING_SIZE - 1) & (XL_TX_RING_SIZE - 1) ;
xl_priv->tx_ring_head++ ;
xl_priv->tx_ring_head &= (XL_TX_RING_SIZE - 1) ;
xl_priv->free_ring_entries-- ;
xl_priv->xl_tx_ring[tx_prev].dnnextptr = xl_priv->tx_ring_dma_addr + (sizeof (struct xl_tx_desc) * tx_head) ;
/* Sneaky, by doing a read on DnListPtr we can force the card to poll on the DnNextPtr */
/* readl(xl_mmio + MMIO_DNLISTPTR) ; */
netif_wake_queue(dev) ;
spin_unlock_irqrestore(&xl_priv->xl_lock,flags) ;
return 0;
} else {
spin_unlock_irqrestore(&xl_priv->xl_lock,flags) ;
return 1;
}
}
/*
* The NIC has told us that a packet has been downloaded onto the card, we must
* find out which packet it has done, clear the skb and information for the packet
* then advance around the ring for all tranmitted packets
*/
static void xl_dn_comp(struct net_device *dev)
{
struct xl_private *xl_priv=(struct xl_private *)dev->priv;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
struct xl_tx_desc *txd ;
if (xl_priv->tx_ring_tail == 255) {/* First time */
xl_priv->xl_tx_ring[0].framestartheader = 0 ;
xl_priv->xl_tx_ring[0].dnnextptr = 0 ;
xl_priv->tx_ring_tail = 1 ;
}
while (xl_priv->xl_tx_ring[xl_priv->tx_ring_tail].framestartheader & TXDNCOMPLETE ) {
txd = &(xl_priv->xl_tx_ring[xl_priv->tx_ring_tail]) ;
pci_unmap_single(xl_priv->pdev,txd->buffer, xl_priv->tx_ring_skb[xl_priv->tx_ring_tail]->len, PCI_DMA_TODEVICE) ;
txd->framestartheader = 0 ;
txd->buffer = 0xdeadbeef ;
txd->buffer_length = 0 ;
dev_kfree_skb_irq(xl_priv->tx_ring_skb[xl_priv->tx_ring_tail]) ;
xl_priv->tx_ring_tail++ ;
xl_priv->tx_ring_tail &= (XL_TX_RING_SIZE - 1) ;
xl_priv->free_ring_entries++ ;
}
netif_wake_queue(dev) ;
writel(ACK_INTERRUPT | DNCOMPACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
}
/*
* Close the adapter properly.
* This srb reply cannot be handled from interrupt context as we have
* to free the interrupt from the driver.
*/
static int xl_close(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
unsigned long t ;
netif_stop_queue(dev) ;
/*
* Close the adapter, need to stall the rx and tx queues.
*/
writew(DNSTALL, xl_mmio + MMIO_COMMAND) ;
t=jiffies;
while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
schedule();
if(jiffies-t > 10*HZ) {
printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-DNSTALL not responding.\n", dev->name);
break ;
}
}
writew(DNDISABLE, xl_mmio + MMIO_COMMAND) ;
t=jiffies;
while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
schedule();
if(jiffies-t > 10*HZ) {
printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-DNDISABLE not responding.\n", dev->name);
break ;
}
}
writew(UPSTALL, xl_mmio + MMIO_COMMAND) ;
t=jiffies;
while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
schedule();
if(jiffies-t > 10*HZ) {
printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-UPSTALL not responding.\n", dev->name);
break ;
}
}
/* Turn off interrupts, we will still get the indication though
* so we can trap it
*/
writel(SETINTENABLE, xl_mmio + MMIO_COMMAND) ;
xl_srb_cmd(dev,CLOSE_NIC) ;
t=jiffies;
while (!(readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_SRB)) {
schedule();
if(jiffies-t > 10*HZ) {
printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-CLOSENIC not responding.\n", dev->name);
break ;
}
}
/* Read the srb response from the adapter */
writel(MEM_BYTE_READ | 0xd0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD);
if (readb(xl_mmio + MMIO_MACDATA) != CLOSE_NIC) {
printk(KERN_INFO "%s: CLOSE_NIC did not get a CLOSE_NIC response \n",dev->name) ;
} else {
writel((MEM_BYTE_READ | 0xd0000 | xl_priv->srb) +2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
if (readb(xl_mmio + MMIO_MACDATA)==0) {
printk(KERN_INFO "%s: Adapter has been closed \n",dev->name) ;
writew(ACK_INTERRUPT | SRBRACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
xl_freemem(dev) ;
free_irq(dev->irq,dev) ;
} else {
printk(KERN_INFO "%s: Close nic command returned error code %02x\n",dev->name, readb(xl_mmio + MMIO_MACDATA)) ;
}
}
/* Reset the upload and download logic */
writew(UPRESET, xl_mmio + MMIO_COMMAND) ;
t=jiffies;
while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
schedule();
if(jiffies-t > 10*HZ) {
printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-UPRESET not responding.\n", dev->name);
break ;
}
}
writew(DNRESET, xl_mmio + MMIO_COMMAND) ;
t=jiffies;
while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
schedule();
if(jiffies-t > 10*HZ) {
printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-DNRESET not responding.\n", dev->name);
break ;
}
}
xl_hw_reset(dev) ;
return 0 ;
}
static void xl_set_rx_mode(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
struct dev_mc_list *dmi ;
unsigned char dev_mc_address[4] ;
u16 options ;
int i ;
if (dev->flags & IFF_PROMISC)
options = 0x0004 ;
else
options = 0x0000 ;
if (options ^ xl_priv->xl_copy_all_options) { /* Changed, must send command */
xl_priv->xl_copy_all_options = options ;
xl_srb_cmd(dev, SET_RECEIVE_MODE) ;
return ;
}
dev_mc_address[0] = dev_mc_address[1] = dev_mc_address[2] = dev_mc_address[3] = 0 ;
for (i=0,dmi=dev->mc_list;i < dev->mc_count; i++,dmi = dmi->next) {
dev_mc_address[0] |= dmi->dmi_addr[2] ;
dev_mc_address[1] |= dmi->dmi_addr[3] ;
dev_mc_address[2] |= dmi->dmi_addr[4] ;
dev_mc_address[3] |= dmi->dmi_addr[5] ;
}
if (memcmp(xl_priv->xl_functional_addr,dev_mc_address,4) != 0) { /* Options have changed, run the command */
memcpy(xl_priv->xl_functional_addr, dev_mc_address,4) ;
xl_srb_cmd(dev, SET_FUNC_ADDRESS) ;
}
return ;
}
/*
* We issued an srb command and now we must read
* the response from the completed command.
*/
static void xl_srb_bh(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
u8 srb_cmd, ret_code ;
int i ;
writel(MEM_BYTE_READ | 0xd0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
srb_cmd = readb(xl_mmio + MMIO_MACDATA) ;
writel((MEM_BYTE_READ | 0xd0000 | xl_priv->srb) +2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
ret_code = readb(xl_mmio + MMIO_MACDATA) ;
/* Ret_code is standard across all commands */
switch (ret_code) {
case 1:
printk(KERN_INFO "%s: Command: %d - Invalid Command code\n",dev->name,srb_cmd) ;
break ;
case 4:
printk(KERN_INFO "%s: Command: %d - Adapter is closed, must be open for this command \n",dev->name,srb_cmd) ;
break ;
case 6:
printk(KERN_INFO "%s: Command: %d - Options Invalid for command \n",dev->name,srb_cmd) ;
break ;
case 0: /* Successful command execution */
switch (srb_cmd) {
case READ_LOG: /* Returns 14 bytes of data from the NIC */
if(xl_priv->xl_message_level)
printk(KERN_INFO "%s: READ.LOG 14 bytes of data ",dev->name) ;
/*
* We still have to read the log even if message_level = 0 and we don't want
* to see it
*/
for (i=0;i<14;i++) {
writel(MEM_BYTE_READ | 0xd0000 | xl_priv->srb | i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
if(xl_priv->xl_message_level)
printk("%02x:",readb(xl_mmio + MMIO_MACDATA)) ;
}
printk("\n") ;
break ;
case SET_FUNC_ADDRESS:
if(xl_priv->xl_message_level)
printk(KERN_INFO "%s: Functional Address Set \n",dev->name) ;
break ;
case CLOSE_NIC:
if(xl_priv->xl_message_level)
printk(KERN_INFO "%s: Received CLOSE_NIC interrupt in interrupt handler \n",dev->name) ;
break ;
case SET_MULTICAST_MODE:
if(xl_priv->xl_message_level)
printk(KERN_INFO "%s: Multicast options successfully changed\n",dev->name) ;
break ;
case SET_RECEIVE_MODE:
if(xl_priv->xl_message_level) {
if (xl_priv->xl_copy_all_options == 0x0004)
printk(KERN_INFO "%s: Entering promiscuous mode \n", dev->name) ;
else
printk(KERN_INFO "%s: Entering normal receive mode \n",dev->name) ;
}
break ;
} /* switch */
break ;
} /* switch */
return ;
}
static struct net_device_stats * xl_get_stats(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
return (struct net_device_stats *) &xl_priv->xl_stats;
}
static int xl_set_mac_address (struct net_device *dev, void *addr)
{
struct sockaddr *saddr = addr ;
struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
if (netif_running(dev)) {
printk(KERN_WARNING "%s: Cannot set mac/laa address while card is open\n", dev->name) ;
return -EIO ;
}
memcpy(xl_priv->xl_laa, saddr->sa_data,dev->addr_len) ;
if (xl_priv->xl_message_level) {
printk(KERN_INFO "%s: MAC/LAA Set to = %x.%x.%x.%x.%x.%x\n",dev->name, xl_priv->xl_laa[0],
xl_priv->xl_laa[1], xl_priv->xl_laa[2],
xl_priv->xl_laa[3], xl_priv->xl_laa[4],
xl_priv->xl_laa[5]);
}
return 0 ;
}
static void xl_arb_cmd(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
u8 arb_cmd ;
u16 lan_status, lan_status_diff ;
writel( ( MEM_BYTE_READ | 0xD0000 | xl_priv->arb), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
arb_cmd = readb(xl_mmio + MMIO_MACDATA) ;
if (arb_cmd == RING_STATUS_CHANGE) { /* Ring.Status.Change */
writel( ( (MEM_WORD_READ | 0xD0000 | xl_priv->arb) + 6), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
printk(KERN_INFO "%s: Ring Status Change: New Status = %04x\n", dev->name, ntohs(readw(xl_mmio + MMIO_MACDATA) )) ;
lan_status = ntohs(readw(xl_mmio + MMIO_MACDATA));
/* Acknowledge interrupt, this tells nic we are done with the arb */
writel(ACK_INTERRUPT | ARBCACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
lan_status_diff = xl_priv->xl_lan_status ^ lan_status ;
if (lan_status_diff & (LSC_LWF | LSC_ARW | LSC_FPE | LSC_RR) ) {
if (lan_status_diff & LSC_LWF)
printk(KERN_WARNING "%s: Short circuit detected on the lobe\n",dev->name);
if (lan_status_diff & LSC_ARW)
printk(KERN_WARNING "%s: Auto removal error\n",dev->name);
if (lan_status_diff & LSC_FPE)
printk(KERN_WARNING "%s: FDX Protocol Error\n",dev->name);
if (lan_status_diff & LSC_RR)
printk(KERN_WARNING "%s: Force remove MAC frame received\n",dev->name);
/* Adapter has been closed by the hardware */
netif_stop_queue(dev);
xl_freemem(dev) ;
free_irq(dev->irq,dev);
printk(KERN_WARNING "%s: Adapter has been closed \n", dev->name) ;
} /* If serious error */
if (xl_priv->xl_message_level) {
if (lan_status_diff & LSC_SIG_LOSS)
printk(KERN_WARNING "%s: No receive signal detected \n", dev->name) ;
if (lan_status_diff & LSC_HARD_ERR)
printk(KERN_INFO "%s: Beaconing \n",dev->name);
if (lan_status_diff & LSC_SOFT_ERR)
printk(KERN_WARNING "%s: Adapter transmitted Soft Error Report Mac Frame \n",dev->name);
if (lan_status_diff & LSC_TRAN_BCN)
printk(KERN_INFO "%s: We are tranmitting the beacon, aaah\n",dev->name);
if (lan_status_diff & LSC_SS)
printk(KERN_INFO "%s: Single Station on the ring \n", dev->name);
if (lan_status_diff & LSC_RING_REC)
printk(KERN_INFO "%s: Ring recovery ongoing\n",dev->name);
if (lan_status_diff & LSC_FDX_MODE)
printk(KERN_INFO "%s: Operating in FDX mode\n",dev->name);
}
if (lan_status_diff & LSC_CO) {
if (xl_priv->xl_message_level)
printk(KERN_INFO "%s: Counter Overflow \n", dev->name);
/* Issue READ.LOG command */
xl_srb_cmd(dev, READ_LOG) ;
}
/* There is no command in the tech docs to issue the read_sr_counters */
if (lan_status_diff & LSC_SR_CO) {
if (xl_priv->xl_message_level)
printk(KERN_INFO "%s: Source routing counters overflow\n", dev->name);
}
xl_priv->xl_lan_status = lan_status ;
} /* Lan.change.status */
else if ( arb_cmd == RECEIVE_DATA) { /* Received.Data */
#if XL_DEBUG
printk(KERN_INFO "Received.Data \n") ;
#endif
writel( ((MEM_WORD_READ | 0xD0000 | xl_priv->arb) + 6), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
xl_priv->mac_buffer = ntohs(readw(xl_mmio + MMIO_MACDATA)) ;
/* Now we are going to be really basic here and not do anything
* with the data at all. The tech docs do not give me enough
* information to calculate the buffers properly so we're
* just going to tell the nic that we've dealt with the frame
* anyway.
*/
dev->last_rx = jiffies ;
/* Acknowledge interrupt, this tells nic we are done with the arb */
writel(ACK_INTERRUPT | ARBCACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
/* Is the ASB free ? */
xl_priv->asb_queued = 0 ;
writel( ((MEM_BYTE_READ | 0xD0000 | xl_priv->asb) + 2), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
if (readb(xl_mmio + MMIO_MACDATA) != 0xff) {
xl_priv->asb_queued = 1 ;
xl_wait_misr_flags(dev) ;
writel(MEM_BYTE_WRITE | MF_ASBFR, xl_mmio + MMIO_MAC_ACCESS_CMD);
writeb(0xff, xl_mmio + MMIO_MACDATA) ;
writel(MMIO_BYTE_WRITE | MISR_SET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(MISR_ASBFR, xl_mmio + MMIO_MACDATA) ;
return ;
/* Drop out and wait for the bottom half to be run */
}
xl_asb_cmd(dev) ;
} else {
printk(KERN_WARNING "%s: Received unknown arb (xl_priv) command: %02x \n",dev->name,arb_cmd) ;
}
/* Acknowledge the arb interrupt */
writel(ACK_INTERRUPT | ARBCACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
return ;
}
/*
* There is only one asb command, but we can get called from different
* places.
*/
static void xl_asb_cmd(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
if (xl_priv->asb_queued == 1)
writel(ACK_INTERRUPT | LATCH_ACK | ASBFACK, xl_mmio + MMIO_COMMAND) ;
writel(MEM_BYTE_WRITE | 0xd0000 | xl_priv->asb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(0x81, xl_mmio + MMIO_MACDATA) ;
writel(MEM_WORD_WRITE | 0xd0000 | xl_priv->asb | 6, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(ntohs(xl_priv->mac_buffer), xl_mmio + MMIO_MACDATA) ;
xl_wait_misr_flags(dev) ;
writel(MEM_BYTE_WRITE | MF_RASB, xl_mmio + MMIO_MAC_ACCESS_CMD);
writeb(0xff, xl_mmio + MMIO_MACDATA) ;
writel(MMIO_BYTE_WRITE | MISR_SET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(MISR_RASB, xl_mmio + MMIO_MACDATA) ;
xl_priv->asb_queued = 2 ;
return ;
}
/*
* This will only get called if there was an error
* from the asb cmd.
*/
static void xl_asb_bh(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
u8 ret_code ;
writel(MMIO_BYTE_READ | 0xd0000 | xl_priv->asb | 2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
ret_code = readb(xl_mmio + MMIO_MACDATA) ;
switch (ret_code) {
case 0x01:
printk(KERN_INFO "%s: ASB Command, unrecognized command code \n",dev->name) ;
break ;
case 0x26:
printk(KERN_INFO "%s: ASB Command, unexpected receive buffer \n", dev->name) ;
break ;
case 0x40:
printk(KERN_INFO "%s: ASB Command, Invalid Station ID \n", dev->name) ;
break ;
}
xl_priv->asb_queued = 0 ;
writel(ACK_INTERRUPT | LATCH_ACK | ASBFACK, xl_mmio + MMIO_COMMAND) ;
return ;
}
/*
* Issue srb commands to the nic
*/
static void xl_srb_cmd(struct net_device *dev, int srb_cmd)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
switch (srb_cmd) {
case READ_LOG:
writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(READ_LOG, xl_mmio + MMIO_MACDATA) ;
break;
case CLOSE_NIC:
writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(CLOSE_NIC, xl_mmio + MMIO_MACDATA) ;
break ;
case SET_RECEIVE_MODE:
writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(SET_RECEIVE_MODE, xl_mmio + MMIO_MACDATA) ;
writel(MEM_WORD_WRITE | 0xD0000 | xl_priv->srb | 4, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writew(xl_priv->xl_copy_all_options, xl_mmio + MMIO_MACDATA) ;
break ;
case SET_FUNC_ADDRESS:
writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(SET_FUNC_ADDRESS, xl_mmio + MMIO_MACDATA) ;
writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb | 6 , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(xl_priv->xl_functional_addr[0], xl_mmio + MMIO_MACDATA) ;
writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb | 7 , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(xl_priv->xl_functional_addr[1], xl_mmio + MMIO_MACDATA) ;
writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb | 8 , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(xl_priv->xl_functional_addr[2], xl_mmio + MMIO_MACDATA) ;
writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb | 9 , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(xl_priv->xl_functional_addr[3], xl_mmio + MMIO_MACDATA) ;
break ;
} /* switch */
xl_wait_misr_flags(dev) ;
/* Write 0xff to the CSRB flag */
writel(MEM_BYTE_WRITE | MF_CSRB , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(0xFF, xl_mmio + MMIO_MACDATA) ;
/* Set csrb bit in MISR register to process command */
writel(MMIO_BYTE_WRITE | MISR_SET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(MISR_CSRB, xl_mmio + MMIO_MACDATA) ;
xl_priv->srb_queued = 1 ;
return ;
}
/*
* This is nasty, to use the MISR command you have to wait for 6 memory locations
* to be zero. This is the way the driver does on other OS'es so we should be ok with
* the empty loop.
*/
static void xl_wait_misr_flags(struct net_device *dev)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
int i ;
writel(MMIO_BYTE_READ | MISR_RW, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
if (readb(xl_mmio + MMIO_MACDATA) != 0) { /* Misr not clear */
for (i=0; i<6; i++) {
writel(MEM_BYTE_READ | 0xDFFE0 | i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
while (readb(xl_mmio + MMIO_MACDATA) != 0 ) {} ; /* Empty Loop */
}
}
writel(MMIO_BYTE_WRITE | MISR_AND, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
writeb(0x80, xl_mmio + MMIO_MACDATA) ;
return ;
}
/*
* Change mtu size, this should work the same as olympic
*/
static int xl_change_mtu(struct net_device *dev, int mtu)
{
struct xl_private *xl_priv = (struct xl_private *) dev->priv;
u16 max_mtu ;
if (xl_priv->xl_ring_speed == 4)
max_mtu = 4500 ;
else
max_mtu = 18000 ;
if (mtu > max_mtu)
return -EINVAL ;
if (mtu < 100)
return -EINVAL ;
dev->mtu = mtu ;
xl_priv->pkt_buf_sz = mtu + TR_HLEN ;
return 0 ;
}
static void __devexit xl_remove_one (struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct xl_private *xl_priv=(struct xl_private *)dev->priv;
unregister_netdev(dev);
iounmap(xl_priv->xl_mmio) ;
pci_release_regions(pdev) ;
pci_set_drvdata(pdev,NULL) ;
free_netdev(dev);
return ;
}
static struct pci_driver xl_3c359_driver = {
.name = "3c359",
.id_table = xl_pci_tbl,
.probe = xl_probe,
.remove = __devexit_p(xl_remove_one),
};
static int __init xl_pci_init (void)
{
return pci_register_driver(&xl_3c359_driver);
}
static void __exit xl_pci_cleanup (void)
{
pci_unregister_driver (&xl_3c359_driver);
}
module_init(xl_pci_init);
module_exit(xl_pci_cleanup);
MODULE_LICENSE("GPL") ;
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