diff --git a/drivers/net/8390.c b/drivers/net/8390.c
index 3d1c599ac3cbeead34d4954181fd69f4abe3d611..a82807641dcf865a6f269692d4d2eddedfab64e2 100644
--- a/drivers/net/8390.c
+++ b/drivers/net/8390.c
@@ -1,1104 +1,40 @@
-/* 8390.c: A general NS8390 ethernet driver core for linux. */
-/*
- Written 1992-94 by Donald Becker.
-
- Copyright 1993 United States Government as represented by the
- Director, National Security Agency.
-
- This software may be used and distributed according to the terms
- of the GNU General Public License, incorporated herein by reference.
-
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
-
-
- This is the chip-specific code for many 8390-based ethernet adaptors.
- This is not a complete driver, it must be combined with board-specific
- code such as ne.c, wd.c, 3c503.c, etc.
-
- Seeing how at least eight drivers use this code, (not counting the
- PCMCIA ones either) it is easy to break some card by what seems like
- a simple innocent change. Please contact me or Donald if you think
- you have found something that needs changing. -- PG
-
-
- Changelog:
-
- Paul Gortmaker : remove set_bit lock, other cleanups.
- Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
- ei_block_input() for eth_io_copy_and_sum().
- Paul Gortmaker : exchange static int ei_pingpong for a #define,
- also add better Tx error handling.
- Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
- Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
- Paul Gortmaker : tweak ANK's above multicast changes a bit.
- Paul Gortmaker : update packet statistics for v2.1.x
- Alan Cox : support arbitary stupid port mappings on the
- 68K Macintosh. Support >16bit I/O spaces
- Paul Gortmaker : add kmod support for auto-loading of the 8390
- module by all drivers that require it.
- Alan Cox : Spinlocking work, added 'BUG_83C690'
- Paul Gortmaker : Separate out Tx timeout code from Tx path.
- Paul Gortmaker : Remove old unused single Tx buffer code.
- Hayato Fujiwara : Add m32r support.
- Paul Gortmaker : use skb_padto() instead of stack scratch area
-
- Sources:
- The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
-
- */
+/* 8390 core for usual drivers */
static const char version[] =
"8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/fs.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/bitops.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/fcntl.h>
-#include <linux/in.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/crc32.h>
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-
-#define NS8390_CORE
-#include "8390.h"
-
-#define BUG_83C690
-
-/* These are the operational function interfaces to board-specific
- routines.
- void reset_8390(struct net_device *dev)
- Resets the board associated with DEV, including a hardware reset of
- the 8390. This is only called when there is a transmit timeout, and
- it is always followed by 8390_init().
- void block_output(struct net_device *dev, int count, const unsigned char *buf,
- int start_page)
- Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
- "page" value uses the 8390's 256-byte pages.
- void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
- Read the 4 byte, page aligned 8390 header. *If* there is a
- subsequent read, it will be of the rest of the packet.
- void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
- Read COUNT bytes from the packet buffer into the skb data area. Start
- reading from RING_OFFSET, the address as the 8390 sees it. This will always
- follow the read of the 8390 header.
-*/
-#define ei_reset_8390 (ei_local->reset_8390)
-#define ei_block_output (ei_local->block_output)
-#define ei_block_input (ei_local->block_input)
-#define ei_get_8390_hdr (ei_local->get_8390_hdr)
-
-/* use 0 for production, 1 for verification, >2 for debug */
-#ifndef ei_debug
-int ei_debug = 1;
-#endif
-
-/* Index to functions. */
-static void ei_tx_intr(struct net_device *dev);
-static void ei_tx_err(struct net_device *dev);
-static void ei_tx_timeout(struct net_device *dev);
-static void ei_receive(struct net_device *dev);
-static void ei_rx_overrun(struct net_device *dev);
-
-/* Routines generic to NS8390-based boards. */
-static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
- int start_page);
-static void set_multicast_list(struct net_device *dev);
-static void do_set_multicast_list(struct net_device *dev);
-
-/*
- * SMP and the 8390 setup.
- *
- * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
- * a page register that controls bank and packet buffer access. We guard
- * this with ei_local->page_lock. Nobody should assume or set the page other
- * than zero when the lock is not held. Lock holders must restore page 0
- * before unlocking. Even pure readers must take the lock to protect in
- * page 0.
- *
- * To make life difficult the chip can also be very slow. We therefore can't
- * just use spinlocks. For the longer lockups we disable the irq the device
- * sits on and hold the lock. We must hold the lock because there is a dual
- * processor case other than interrupts (get stats/set multicast list in
- * parallel with each other and transmit).
- *
- * Note: in theory we can just disable the irq on the card _but_ there is
- * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
- * enter lock, take the queued irq. So we waddle instead of flying.
- *
- * Finally by special arrangement for the purpose of being generally
- * annoying the transmit function is called bh atomic. That places
- * restrictions on the user context callers as disable_irq won't save
- * them.
- */
-
-
+#include "lib8390.c"
-/**
- * ei_open - Open/initialize the board.
- * @dev: network device to initialize
- *
- * This routine goes all-out, setting everything
- * up anew at each open, even though many of these registers should only
- * need to be set once at boot.
- */
int ei_open(struct net_device *dev)
{
- unsigned long flags;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
-
- /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout
- wrapper that does e.g. media check & then calls ei_tx_timeout. */
- if (dev->tx_timeout == NULL)
- dev->tx_timeout = ei_tx_timeout;
- if (dev->watchdog_timeo <= 0)
- dev->watchdog_timeo = TX_TIMEOUT;
-
- /*
- * Grab the page lock so we own the register set, then call
- * the init function.
- */
-
- spin_lock_irqsave(&ei_local->page_lock, flags);
- NS8390_init(dev, 1);
- /* Set the flag before we drop the lock, That way the IRQ arrives
- after its set and we get no silly warnings */
- netif_start_queue(dev);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
- ei_local->irqlock = 0;
- return 0;
+ return __ei_open(dev);
}
-/**
- * ei_close - shut down network device
- * @dev: network device to close
- *
- * Opposite of ei_open(). Only used when "ifconfig <devname> down" is done.
- */
int ei_close(struct net_device *dev)
{
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- unsigned long flags;
-
- /*
- * Hold the page lock during close
- */
-
- spin_lock_irqsave(&ei_local->page_lock, flags);
- NS8390_init(dev, 0);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
- netif_stop_queue(dev);
- return 0;
-}
-
-/**
- * ei_tx_timeout - handle transmit time out condition
- * @dev: network device which has apparently fallen asleep
- *
- * Called by kernel when device never acknowledges a transmit has
- * completed (or failed) - i.e. never posted a Tx related interrupt.
- */
-
-void ei_tx_timeout(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- int txsr, isr, tickssofar = jiffies - dev->trans_start;
- unsigned long flags;
-
-#if defined(CONFIG_M32R) && defined(CONFIG_SMP)
- unsigned long icucr;
-
- local_irq_save(flags);
- icucr = inl(M32R_ICU_CR1_PORTL);
- icucr |= M32R_ICUCR_ISMOD11;
- outl(icucr, M32R_ICU_CR1_PORTL);
- local_irq_restore(flags);
-#endif
- ei_local->stat.tx_errors++;
-
- spin_lock_irqsave(&ei_local->page_lock, flags);
- txsr = inb(e8390_base+EN0_TSR);
- isr = inb(e8390_base+EN0_ISR);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
-
- printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
- dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
- (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
-
- if (!isr && !ei_local->stat.tx_packets)
- {
- /* The 8390 probably hasn't gotten on the cable yet. */
- ei_local->interface_num ^= 1; /* Try a different xcvr. */
- }
-
- /* Ugly but a reset can be slow, yet must be protected */
-
- disable_irq_nosync_lockdep(dev->irq);
- spin_lock(&ei_local->page_lock);
-
- /* Try to restart the card. Perhaps the user has fixed something. */
- ei_reset_8390(dev);
- NS8390_init(dev, 1);
-
- spin_unlock(&ei_local->page_lock);
- enable_irq_lockdep(dev->irq);
- netif_wake_queue(dev);
-}
-
-/**
- * ei_start_xmit - begin packet transmission
- * @skb: packet to be sent
- * @dev: network device to which packet is sent
- *
- * Sends a packet to an 8390 network device.
- */
-
-static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- int send_length = skb->len, output_page;
- unsigned long flags;
- char buf[ETH_ZLEN];
- char *data = skb->data;
-
- if (skb->len < ETH_ZLEN) {
- memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */
- memcpy(buf, data, skb->len);
- send_length = ETH_ZLEN;
- data = buf;
- }
-
- /* Mask interrupts from the ethercard.
- SMP: We have to grab the lock here otherwise the IRQ handler
- on another CPU can flip window and race the IRQ mask set. We end
- up trashing the mcast filter not disabling irqs if we don't lock */
-
- spin_lock_irqsave(&ei_local->page_lock, flags);
- outb_p(0x00, e8390_base + EN0_IMR);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
-
-
- /*
- * Slow phase with lock held.
- */
-
- disable_irq_nosync_lockdep_irqsave(dev->irq, &flags);
-
- spin_lock(&ei_local->page_lock);
-
- ei_local->irqlock = 1;
-
- /*
- * We have two Tx slots available for use. Find the first free
- * slot, and then perform some sanity checks. With two Tx bufs,
- * you get very close to transmitting back-to-back packets. With
- * only one Tx buf, the transmitter sits idle while you reload the
- * card, leaving a substantial gap between each transmitted packet.
- */
-
- if (ei_local->tx1 == 0)
- {
- output_page = ei_local->tx_start_page;
- ei_local->tx1 = send_length;
- if (ei_debug && ei_local->tx2 > 0)
- printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
- dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
- }
- else if (ei_local->tx2 == 0)
- {
- output_page = ei_local->tx_start_page + TX_PAGES/2;
- ei_local->tx2 = send_length;
- if (ei_debug && ei_local->tx1 > 0)
- printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
- dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
- }
- else
- { /* We should never get here. */
- if (ei_debug)
- printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
- dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
- ei_local->irqlock = 0;
- netif_stop_queue(dev);
- outb_p(ENISR_ALL, e8390_base + EN0_IMR);
- spin_unlock(&ei_local->page_lock);
- enable_irq_lockdep_irqrestore(dev->irq, &flags);
- ei_local->stat.tx_errors++;
- return 1;
- }
-
- /*
- * Okay, now upload the packet and trigger a send if the transmitter
- * isn't already sending. If it is busy, the interrupt handler will
- * trigger the send later, upon receiving a Tx done interrupt.
- */
-
- ei_block_output(dev, send_length, data, output_page);
-
- if (! ei_local->txing)
- {
- ei_local->txing = 1;
- NS8390_trigger_send(dev, send_length, output_page);
- dev->trans_start = jiffies;
- if (output_page == ei_local->tx_start_page)
- {
- ei_local->tx1 = -1;
- ei_local->lasttx = -1;
- }
- else
- {
- ei_local->tx2 = -1;
- ei_local->lasttx = -2;
- }
- }
- else ei_local->txqueue++;
-
- if (ei_local->tx1 && ei_local->tx2)
- netif_stop_queue(dev);
- else
- netif_start_queue(dev);
-
- /* Turn 8390 interrupts back on. */
- ei_local->irqlock = 0;
- outb_p(ENISR_ALL, e8390_base + EN0_IMR);
-
- spin_unlock(&ei_local->page_lock);
- enable_irq_lockdep_irqrestore(dev->irq, &flags);
-
- dev_kfree_skb (skb);
- ei_local->stat.tx_bytes += send_length;
-
- return 0;
+ return __ei_close(dev);
}
-/**
- * ei_interrupt - handle the interrupts from an 8390
- * @irq: interrupt number
- * @dev_id: a pointer to the net_device
- *
- * Handle the ether interface interrupts. We pull packets from
- * the 8390 via the card specific functions and fire them at the networking
- * stack. We also handle transmit completions and wake the transmit path if
- * necessary. We also update the counters and do other housekeeping as
- * needed.
- */
-
irqreturn_t ei_interrupt(int irq, void *dev_id)
{
- struct net_device *dev = dev_id;
- long e8390_base;
- int interrupts, nr_serviced = 0;
- struct ei_device *ei_local;
-
- e8390_base = dev->base_addr;
- ei_local = netdev_priv(dev);
-
- /*
- * Protect the irq test too.
- */
-
- spin_lock(&ei_local->page_lock);
-
- if (ei_local->irqlock)
- {
-#if 1 /* This might just be an interrupt for a PCI device sharing this line */
- /* The "irqlock" check is only for testing. */
- printk(ei_local->irqlock
- ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
- : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
- dev->name, inb_p(e8390_base + EN0_ISR),
- inb_p(e8390_base + EN0_IMR));
-#endif
- spin_unlock(&ei_local->page_lock);
- return IRQ_NONE;
- }
-
- /* Change to page 0 and read the intr status reg. */
- outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
- if (ei_debug > 3)
- printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
- inb_p(e8390_base + EN0_ISR));
-
- /* !!Assumption!! -- we stay in page 0. Don't break this. */
- while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
- && ++nr_serviced < MAX_SERVICE)
- {
- if (!netif_running(dev)) {
- printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
- /* rmk - acknowledge the interrupts */
- outb_p(interrupts, e8390_base + EN0_ISR);
- interrupts = 0;
- break;
- }
- if (interrupts & ENISR_OVER)
- ei_rx_overrun(dev);
- else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
- {
- /* Got a good (?) packet. */
- ei_receive(dev);
- }
- /* Push the next to-transmit packet through. */
- if (interrupts & ENISR_TX)
- ei_tx_intr(dev);
- else if (interrupts & ENISR_TX_ERR)
- ei_tx_err(dev);
-
- if (interrupts & ENISR_COUNTERS)
- {
- ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
- ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
- ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
- outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
- }
-
- /* Ignore any RDC interrupts that make it back to here. */
- if (interrupts & ENISR_RDC)
- {
- outb_p(ENISR_RDC, e8390_base + EN0_ISR);
- }
-
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
- }
-
- if (interrupts && ei_debug)
- {
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
- if (nr_serviced >= MAX_SERVICE)
- {
- /* 0xFF is valid for a card removal */
- if(interrupts!=0xFF)
- printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
- dev->name, interrupts);
- outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
- } else {
- printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
- outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
- }
- }
- spin_unlock(&ei_local->page_lock);
- return IRQ_RETVAL(nr_serviced > 0);
+ return __ei_interrupt(irq, dev_id);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
void ei_poll(struct net_device *dev)
{
- disable_irq_lockdep(dev->irq);
- ei_interrupt(dev->irq, dev);
- enable_irq_lockdep(dev->irq);
+ __ei_poll(dev);
}
#endif
-/**
- * ei_tx_err - handle transmitter error
- * @dev: network device which threw the exception
- *
- * A transmitter error has happened. Most likely excess collisions (which
- * is a fairly normal condition). If the error is one where the Tx will
- * have been aborted, we try and send another one right away, instead of
- * letting the failed packet sit and collect dust in the Tx buffer. This
- * is a much better solution as it avoids kernel based Tx timeouts, and
- * an unnecessary card reset.
- *
- * Called with lock held.
- */
-
-static void ei_tx_err(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- unsigned char txsr = inb_p(e8390_base+EN0_TSR);
- unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
-
-#ifdef VERBOSE_ERROR_DUMP
- printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
- if (txsr & ENTSR_ABT)
- printk("excess-collisions ");
- if (txsr & ENTSR_ND)
- printk("non-deferral ");
- if (txsr & ENTSR_CRS)
- printk("lost-carrier ");
- if (txsr & ENTSR_FU)
- printk("FIFO-underrun ");
- if (txsr & ENTSR_CDH)
- printk("lost-heartbeat ");
- printk("\n");
-#endif
-
- outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
-
- if (tx_was_aborted)
- ei_tx_intr(dev);
- else
- {
- ei_local->stat.tx_errors++;
- if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
- if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
- if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++;
- }
-}
-
-/**
- * ei_tx_intr - transmit interrupt handler
- * @dev: network device for which tx intr is handled
- *
- * We have finished a transmit: check for errors and then trigger the next
- * packet to be sent. Called with lock held.
- */
-
-static void ei_tx_intr(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- int status = inb(e8390_base + EN0_TSR);
-
- outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
-
- /*
- * There are two Tx buffers, see which one finished, and trigger
- * the send of another one if it exists.
- */
- ei_local->txqueue--;
-
- if (ei_local->tx1 < 0)
- {
- if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
- printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
- ei_local->name, ei_local->lasttx, ei_local->tx1);
- ei_local->tx1 = 0;
- if (ei_local->tx2 > 0)
- {
- ei_local->txing = 1;
- NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
- dev->trans_start = jiffies;
- ei_local->tx2 = -1,
- ei_local->lasttx = 2;
- }
- else ei_local->lasttx = 20, ei_local->txing = 0;
- }
- else if (ei_local->tx2 < 0)
- {
- if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
- printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
- ei_local->name, ei_local->lasttx, ei_local->tx2);
- ei_local->tx2 = 0;
- if (ei_local->tx1 > 0)
- {
- ei_local->txing = 1;
- NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
- dev->trans_start = jiffies;
- ei_local->tx1 = -1;
- ei_local->lasttx = 1;
- }
- else
- ei_local->lasttx = 10, ei_local->txing = 0;
- }
-// else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
-// dev->name, ei_local->lasttx);
-
- /* Minimize Tx latency: update the statistics after we restart TXing. */
- if (status & ENTSR_COL)
- ei_local->stat.collisions++;
- if (status & ENTSR_PTX)
- ei_local->stat.tx_packets++;
- else
- {
- ei_local->stat.tx_errors++;
- if (status & ENTSR_ABT)
- {
- ei_local->stat.tx_aborted_errors++;
- ei_local->stat.collisions += 16;
- }
- if (status & ENTSR_CRS)
- ei_local->stat.tx_carrier_errors++;
- if (status & ENTSR_FU)
- ei_local->stat.tx_fifo_errors++;
- if (status & ENTSR_CDH)
- ei_local->stat.tx_heartbeat_errors++;
- if (status & ENTSR_OWC)
- ei_local->stat.tx_window_errors++;
- }
- netif_wake_queue(dev);
-}
-
-/**
- * ei_receive - receive some packets
- * @dev: network device with which receive will be run
- *
- * We have a good packet(s), get it/them out of the buffers.
- * Called with lock held.
- */
-
-static void ei_receive(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- unsigned char rxing_page, this_frame, next_frame;
- unsigned short current_offset;
- int rx_pkt_count = 0;
- struct e8390_pkt_hdr rx_frame;
- int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
-
- while (++rx_pkt_count < 10)
- {
- int pkt_len, pkt_stat;
-
- /* Get the rx page (incoming packet pointer). */
- outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
- rxing_page = inb_p(e8390_base + EN1_CURPAG);
- outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
-
- /* Remove one frame from the ring. Boundary is always a page behind. */
- this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
- if (this_frame >= ei_local->stop_page)
- this_frame = ei_local->rx_start_page;
-
- /* Someday we'll omit the previous, iff we never get this message.
- (There is at least one clone claimed to have a problem.)
-
- Keep quiet if it looks like a card removal. One problem here
- is that some clones crash in roughly the same way.
- */
- if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
- printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
- dev->name, this_frame, ei_local->current_page);
-
- if (this_frame == rxing_page) /* Read all the frames? */
- break; /* Done for now */
-
- current_offset = this_frame << 8;
- ei_get_8390_hdr(dev, &rx_frame, this_frame);
-
- pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
- pkt_stat = rx_frame.status;
-
- next_frame = this_frame + 1 + ((pkt_len+4)>>8);
-
- /* Check for bogosity warned by 3c503 book: the status byte is never
- written. This happened a lot during testing! This code should be
- cleaned up someday. */
- if (rx_frame.next != next_frame
- && rx_frame.next != next_frame + 1
- && rx_frame.next != next_frame - num_rx_pages
- && rx_frame.next != next_frame + 1 - num_rx_pages) {
- ei_local->current_page = rxing_page;
- outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
- ei_local->stat.rx_errors++;
- continue;
- }
-
- if (pkt_len < 60 || pkt_len > 1518)
- {
- if (ei_debug)
- printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
- dev->name, rx_frame.count, rx_frame.status,
- rx_frame.next);
- ei_local->stat.rx_errors++;
- ei_local->stat.rx_length_errors++;
- }
- else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
- {
- struct sk_buff *skb;
-
- skb = dev_alloc_skb(pkt_len+2);
- if (skb == NULL)
- {
- if (ei_debug > 1)
- printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
- dev->name, pkt_len);
- ei_local->stat.rx_dropped++;
- break;
- }
- else
- {
- skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
- skb->dev = dev;
- skb_put(skb, pkt_len); /* Make room */
- ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
- skb->protocol=eth_type_trans(skb,dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- ei_local->stat.rx_packets++;
- ei_local->stat.rx_bytes += pkt_len;
- if (pkt_stat & ENRSR_PHY)
- ei_local->stat.multicast++;
- }
- }
- else
- {
- if (ei_debug)
- printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
- dev->name, rx_frame.status, rx_frame.next,
- rx_frame.count);
- ei_local->stat.rx_errors++;
- /* NB: The NIC counts CRC, frame and missed errors. */
- if (pkt_stat & ENRSR_FO)
- ei_local->stat.rx_fifo_errors++;
- }
- next_frame = rx_frame.next;
-
- /* This _should_ never happen: it's here for avoiding bad clones. */
- if (next_frame >= ei_local->stop_page) {
- printk("%s: next frame inconsistency, %#2x\n", dev->name,
- next_frame);
- next_frame = ei_local->rx_start_page;
- }
- ei_local->current_page = next_frame;
- outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
- }
-
- /* We used to also ack ENISR_OVER here, but that would sometimes mask
- a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
- outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
- return;
-}
-
-/**
- * ei_rx_overrun - handle receiver overrun
- * @dev: network device which threw exception
- *
- * We have a receiver overrun: we have to kick the 8390 to get it started
- * again. Problem is that you have to kick it exactly as NS prescribes in
- * the updated datasheets, or "the NIC may act in an unpredictable manner."
- * This includes causing "the NIC to defer indefinitely when it is stopped
- * on a busy network." Ugh.
- * Called with lock held. Don't call this with the interrupts off or your
- * computer will hate you - it takes 10ms or so.
- */
-
-static void ei_rx_overrun(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- unsigned char was_txing, must_resend = 0;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
-
- /*
- * Record whether a Tx was in progress and then issue the
- * stop command.
- */
- was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
-
- if (ei_debug > 1)
- printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
- ei_local->stat.rx_over_errors++;
-
- /*
- * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
- * Early datasheets said to poll the reset bit, but now they say that
- * it "is not a reliable indicator and subsequently should be ignored."
- * We wait at least 10ms.
- */
-
- mdelay(10);
-
- /*
- * Reset RBCR[01] back to zero as per magic incantation.
- */
- outb_p(0x00, e8390_base+EN0_RCNTLO);
- outb_p(0x00, e8390_base+EN0_RCNTHI);
-
- /*
- * See if any Tx was interrupted or not. According to NS, this
- * step is vital, and skipping it will cause no end of havoc.
- */
-
- if (was_txing)
- {
- unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
- if (!tx_completed)
- must_resend = 1;
- }
-
- /*
- * Have to enter loopback mode and then restart the NIC before
- * you are allowed to slurp packets up off the ring.
- */
- outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
- outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
-
- /*
- * Clear the Rx ring of all the debris, and ack the interrupt.
- */
- ei_receive(dev);
- outb_p(ENISR_OVER, e8390_base+EN0_ISR);
-
- /*
- * Leave loopback mode, and resend any packet that got stopped.
- */
- outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
- if (must_resend)
- outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
-}
-
-/*
- * Collect the stats. This is called unlocked and from several contexts.
- */
-
-static struct net_device_stats *get_stats(struct net_device *dev)
-{
- long ioaddr = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- unsigned long flags;
-
- /* If the card is stopped, just return the present stats. */
- if (!netif_running(dev))
- return &ei_local->stat;
-
- spin_lock_irqsave(&ei_local->page_lock,flags);
- /* Read the counter registers, assuming we are in page 0. */
- ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
- ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
- ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
-
- return &ei_local->stat;
-}
-
-/*
- * Form the 64 bit 8390 multicast table from the linked list of addresses
- * associated with this dev structure.
- */
-
-static inline void make_mc_bits(u8 *bits, struct net_device *dev)
-{
- struct dev_mc_list *dmi;
-
- for (dmi=dev->mc_list; dmi; dmi=dmi->next)
- {
- u32 crc;
- if (dmi->dmi_addrlen != ETH_ALEN)
- {
- printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
- continue;
- }
- crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
- /*
- * The 8390 uses the 6 most significant bits of the
- * CRC to index the multicast table.
- */
- bits[crc>>29] |= (1<<((crc>>26)&7));
- }
-}
-
-/**
- * do_set_multicast_list - set/clear multicast filter
- * @dev: net device for which multicast filter is adjusted
- *
- * Set or clear the multicast filter for this adaptor. May be called
- * from a BH in 2.1.x. Must be called with lock held.
- */
-
-static void do_set_multicast_list(struct net_device *dev)
-{
- long e8390_base = dev->base_addr;
- int i;
- struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
-
- if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI)))
- {
- memset(ei_local->mcfilter, 0, 8);
- if (dev->mc_list)
- make_mc_bits(ei_local->mcfilter, dev);
- }
- else
- memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */
-
- /*
- * DP8390 manuals don't specify any magic sequence for altering
- * the multicast regs on an already running card. To be safe, we
- * ensure multicast mode is off prior to loading up the new hash
- * table. If this proves to be not enough, we can always resort
- * to stopping the NIC, loading the table and then restarting.
- *
- * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC
- * Elite16) appear to be write-only. The NS 8390 data sheet lists
- * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and
- * Ultra32 EISA) appears to have this bug fixed.
- */
-
- if (netif_running(dev))
- outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
- outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
- for(i = 0; i < 8; i++)
- {
- outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
-#ifndef BUG_83C690
- if(inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i])
- printk(KERN_ERR "Multicast filter read/write mismap %d\n",i);
-#endif
- }
- outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
-
- if(dev->flags&IFF_PROMISC)
- outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR);
- else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
- outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR);
- else
- outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
- }
-
-/*
- * Called without lock held. This is invoked from user context and may
- * be parallel to just about everything else. Its also fairly quick and
- * not called too often. Must protect against both bh and irq users
- */
-
-static void set_multicast_list(struct net_device *dev)
-{
- unsigned long flags;
- struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
-
- spin_lock_irqsave(&ei_local->page_lock, flags);
- do_set_multicast_list(dev);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
-}
-
-/**
- * ethdev_setup - init rest of 8390 device struct
- * @dev: network device structure to init
- *
- * Initialize the rest of the 8390 device structure. Do NOT __init
- * this, as it is used by 8390 based modular drivers too.
- */
-
-static void ethdev_setup(struct net_device *dev)
-{
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- if (ei_debug > 1)
- printk(version);
-
- dev->hard_start_xmit = &ei_start_xmit;
- dev->get_stats = get_stats;
- dev->set_multicast_list = &set_multicast_list;
-
- ether_setup(dev);
-
- spin_lock_init(&ei_local->page_lock);
-}
-
-/**
- * alloc_ei_netdev - alloc_etherdev counterpart for 8390
- * @size: extra bytes to allocate
- *
- * Allocate 8390-specific net_device.
- */
struct net_device *__alloc_ei_netdev(int size)
{
- return alloc_netdev(sizeof(struct ei_device) + size, "eth%d",
- ethdev_setup);
+ return ____alloc_ei_netdev(size);
}
-
-
-
-/* This page of functions should be 8390 generic */
-/* Follow National Semi's recommendations for initializing the "NIC". */
-
-/**
- * NS8390_init - initialize 8390 hardware
- * @dev: network device to initialize
- * @startp: boolean. non-zero value to initiate chip processing
- *
- * Must be called with lock held.
- */
-
void NS8390_init(struct net_device *dev, int startp)
{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
- int i;
- int endcfg = ei_local->word16
- ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0))
- : 0x48;
-
- if(sizeof(struct e8390_pkt_hdr)!=4)
- panic("8390.c: header struct mispacked\n");
- /* Follow National Semi's recommendations for initing the DP83902. */
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
- outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
- /* Clear the remote byte count registers. */
- outb_p(0x00, e8390_base + EN0_RCNTLO);
- outb_p(0x00, e8390_base + EN0_RCNTHI);
- /* Set to monitor and loopback mode -- this is vital!. */
- outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
- outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
- /* Set the transmit page and receive ring. */
- outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
- ei_local->tx1 = ei_local->tx2 = 0;
- outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
- outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
- ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
- outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
- /* Clear the pending interrupts and mask. */
- outb_p(0xFF, e8390_base + EN0_ISR);
- outb_p(0x00, e8390_base + EN0_IMR);
-
- /* Copy the station address into the DS8390 registers. */
-
- outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
- for(i = 0; i < 6; i++)
- {
- outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
- if (ei_debug > 1 && inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
- printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
- }
-
- outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
-
- netif_start_queue(dev);
- ei_local->tx1 = ei_local->tx2 = 0;
- ei_local->txing = 0;
-
- if (startp)
- {
- outb_p(0xff, e8390_base + EN0_ISR);
- outb_p(ENISR_ALL, e8390_base + EN0_IMR);
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
- outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
- /* 3c503 TechMan says rxconfig only after the NIC is started. */
- outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
- do_set_multicast_list(dev); /* (re)load the mcast table */
- }
-}
-
-/* Trigger a transmit start, assuming the length is valid.
- Always called with the page lock held */
-
-static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
- int start_page)
-{
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
-
- outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD);
-
- if (inb_p(e8390_base + E8390_CMD) & E8390_TRANS)
- {
- printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
- dev->name);
- return;
- }
- outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
- outb_p(length >> 8, e8390_base + EN0_TCNTHI);
- outb_p(start_page, e8390_base + EN0_TPSR);
- outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
+ return __NS8390_init(dev, startp);
}
EXPORT_SYMBOL(ei_open);
diff --git a/drivers/net/8390.h b/drivers/net/8390.h
index f44f1220b3a557c886e287fb575ece44b5d78657..fae4aa92c4b721193b8339f5682e0c74519caa07 100644
--- a/drivers/net/8390.h
+++ b/drivers/net/8390.h
@@ -116,26 +116,23 @@ struct ei_device {
#undef outb
#undef outb_p
-#define inb(port) in_8(port)
-#define outb(val,port) out_8(port,val)
-#define inb_p(port) in_8(port)
-#define outb_p(val,port) out_8(port,val)
+#define ei_inb(port) in_8(port)
+#define ei_outb(val,port) out_8(port,val)
+#define ei_inb_p(port) in_8(port)
+#define ei_outb_p(val,port) out_8(port,val)
-#elif defined(CONFIG_ARM_ETHERH) || defined(CONFIG_ARM_ETHERH_MODULE)
+#elif defined(CONFIG_NE_H8300) || defined(CONFIG_NE_H8300_MODULE)
#define EI_SHIFT(x) (ei_local->reg_offset[x])
-#undef inb
-#undef inb_p
-#undef outb
-#undef outb_p
+#endif
-#define inb(_p) readb(_p)
-#define outb(_v,_p) writeb(_v,_p)
-#define inb_p(_p) inb(_p)
-#define outb_p(_v,_p) outb(_v,_p)
+#ifndef ei_inb
+#define ei_inb(_p) inb(_p)
+#define ei_outb(_v,_p) outb(_v,_p)
+#define ei_inb_p(_p) inb_p(_p)
+#define ei_outb_p(_v,_p) outb_p(_v,_p)
+#endif
-#elif defined(CONFIG_NE_H8300) || defined(CONFIG_NE_H8300_MODULE)
-#define EI_SHIFT(x) (ei_local->reg_offset[x])
-#else
+#ifndef EI_SHIFT
#define EI_SHIFT(x) (x)
#endif
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index f270bc49e571f7195ec54229c23906e747f06af0..53ccc337099c73b6881268abe12d7df506812766 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -90,7 +90,6 @@ obj-$(CONFIG_HP100) += hp100.o
obj-$(CONFIG_SMC9194) += smc9194.o
obj-$(CONFIG_FEC) += fec.o
obj-$(CONFIG_68360_ENET) += 68360enet.o
-obj-$(CONFIG_ARM_ETHERH) += 8390.o
obj-$(CONFIG_WD80x3) += wd.o 8390.o
obj-$(CONFIG_EL2) += 3c503.o 8390.o
obj-$(CONFIG_NE2000) += ne.o 8390.o
diff --git a/drivers/net/arm/etherh.c b/drivers/net/arm/etherh.c
index 4ae98970b2829dba77f2d9815908874168fe17d3..747a71f5dd0e641a405bae6c34871cbef8ebabdc 100644
--- a/drivers/net/arm/etherh.c
+++ b/drivers/net/arm/etherh.c
@@ -52,7 +52,12 @@
#include <asm/ecard.h>
#include <asm/io.h>
-#include "../8390.h"
+#define EI_SHIFT(x) (ei_local->reg_offset[x])
+
+#define ei_inb(_p) readb(_p)
+#define ei_outb(_v,_p) writeb(_v,_p)
+#define ei_inb_p(_p) readb(_p)
+#define ei_outb_p(_v,_p) writeb(_v,_p)
#define NET_DEBUG 0
#define DEBUG_INIT 2
@@ -60,6 +65,11 @@
#define DRV_NAME "etherh"
#define DRV_VERSION "1.11"
+static char version[] __initdata =
+ "EtherH/EtherM Driver (c) 2002-2004 Russell King " DRV_VERSION "\n";
+
+#include "../lib8390.c"
+
static unsigned int net_debug = NET_DEBUG;
struct etherh_priv {
@@ -87,9 +97,6 @@ MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("EtherH/EtherM driver");
MODULE_LICENSE("GPL");
-static char version[] __initdata =
- "EtherH/EtherM Driver (c) 2002-2004 Russell King " DRV_VERSION "\n";
-
#define ETHERH500_DATAPORT 0x800 /* MEMC */
#define ETHERH500_NS8390 0x000 /* MEMC */
#define ETHERH500_CTRLPORT 0x800 /* IOC */
@@ -360,7 +367,7 @@ etherh_block_output (struct net_device *dev, int count, const unsigned char *buf
printk(KERN_ERR "%s: timeout waiting for TX RDC\n",
dev->name);
etherh_reset (dev);
- NS8390_init (dev, 1);
+ __NS8390_init (dev, 1);
break;
}
@@ -465,7 +472,7 @@ etherh_open(struct net_device *dev)
return -EINVAL;
}
- if (request_irq(dev->irq, ei_interrupt, 0, dev->name, dev))
+ if (request_irq(dev->irq, __ei_interrupt, 0, dev->name, dev))
return -EAGAIN;
/*
@@ -491,7 +498,7 @@ etherh_open(struct net_device *dev)
etherh_setif(dev);
etherh_reset(dev);
- ei_open(dev);
+ __ei_open(dev);
return 0;
}
@@ -502,7 +509,7 @@ etherh_open(struct net_device *dev)
static int
etherh_close(struct net_device *dev)
{
- ei_close (dev);
+ __ei_close (dev);
free_irq (dev->irq, dev);
return 0;
}
@@ -650,7 +657,7 @@ etherh_probe(struct expansion_card *ec, const struct ecard_id *id)
if (ret)
goto out;
- dev = __alloc_ei_netdev(sizeof(struct etherh_priv));
+ dev = ____alloc_ei_netdev(sizeof(struct etherh_priv));
if (!dev) {
ret = -ENOMEM;
goto release;
@@ -736,7 +743,7 @@ etherh_probe(struct expansion_card *ec, const struct ecard_id *id)
ei_local->interface_num = 0;
etherh_reset(dev);
- NS8390_init(dev, 0);
+ __NS8390_init(dev, 0);
ret = register_netdev(dev);
if (ret)
diff --git a/drivers/net/lib8390.c b/drivers/net/lib8390.c
new file mode 100644
index 0000000000000000000000000000000000000000..e726c06b8dc643f835b55b288b9a60d2495a71f1
--- /dev/null
+++ b/drivers/net/lib8390.c
@@ -0,0 +1,1097 @@
+/* 8390.c: A general NS8390 ethernet driver core for linux. */
+/*
+ Written 1992-94 by Donald Becker.
+
+ Copyright 1993 United States Government as represented by the
+ Director, National Security Agency.
+
+ This software may be used and distributed according to the terms
+ of the GNU General Public License, incorporated herein by reference.
+
+ The author may be reached as becker@scyld.com, or C/O
+ Scyld Computing Corporation
+ 410 Severn Ave., Suite 210
+ Annapolis MD 21403
+
+
+ This is the chip-specific code for many 8390-based ethernet adaptors.
+ This is not a complete driver, it must be combined with board-specific
+ code such as ne.c, wd.c, 3c503.c, etc.
+
+ Seeing how at least eight drivers use this code, (not counting the
+ PCMCIA ones either) it is easy to break some card by what seems like
+ a simple innocent change. Please contact me or Donald if you think
+ you have found something that needs changing. -- PG
+
+
+ Changelog:
+
+ Paul Gortmaker : remove set_bit lock, other cleanups.
+ Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
+ ei_block_input() for eth_io_copy_and_sum().
+ Paul Gortmaker : exchange static int ei_pingpong for a #define,
+ also add better Tx error handling.
+ Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
+ Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
+ Paul Gortmaker : tweak ANK's above multicast changes a bit.
+ Paul Gortmaker : update packet statistics for v2.1.x
+ Alan Cox : support arbitary stupid port mappings on the
+ 68K Macintosh. Support >16bit I/O spaces
+ Paul Gortmaker : add kmod support for auto-loading of the 8390
+ module by all drivers that require it.
+ Alan Cox : Spinlocking work, added 'BUG_83C690'
+ Paul Gortmaker : Separate out Tx timeout code from Tx path.
+ Paul Gortmaker : Remove old unused single Tx buffer code.
+ Hayato Fujiwara : Add m32r support.
+ Paul Gortmaker : use skb_padto() instead of stack scratch area
+
+ Sources:
+ The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
+
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/fs.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/bitops.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/in.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#define NS8390_CORE
+#include "8390.h"
+
+#define BUG_83C690
+
+/* These are the operational function interfaces to board-specific
+ routines.
+ void reset_8390(struct net_device *dev)
+ Resets the board associated with DEV, including a hardware reset of
+ the 8390. This is only called when there is a transmit timeout, and
+ it is always followed by 8390_init().
+ void block_output(struct net_device *dev, int count, const unsigned char *buf,
+ int start_page)
+ Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
+ "page" value uses the 8390's 256-byte pages.
+ void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
+ Read the 4 byte, page aligned 8390 header. *If* there is a
+ subsequent read, it will be of the rest of the packet.
+ void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
+ Read COUNT bytes from the packet buffer into the skb data area. Start
+ reading from RING_OFFSET, the address as the 8390 sees it. This will always
+ follow the read of the 8390 header.
+*/
+#define ei_reset_8390 (ei_local->reset_8390)
+#define ei_block_output (ei_local->block_output)
+#define ei_block_input (ei_local->block_input)
+#define ei_get_8390_hdr (ei_local->get_8390_hdr)
+
+/* use 0 for production, 1 for verification, >2 for debug */
+#ifndef ei_debug
+int ei_debug = 1;
+#endif
+
+/* Index to functions. */
+static void ei_tx_intr(struct net_device *dev);
+static void ei_tx_err(struct net_device *dev);
+static void ei_tx_timeout(struct net_device *dev);
+static void ei_receive(struct net_device *dev);
+static void ei_rx_overrun(struct net_device *dev);
+
+/* Routines generic to NS8390-based boards. */
+static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
+ int start_page);
+static void set_multicast_list(struct net_device *dev);
+static void do_set_multicast_list(struct net_device *dev);
+static void __NS8390_init(struct net_device *dev, int startp);
+
+/*
+ * SMP and the 8390 setup.
+ *
+ * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
+ * a page register that controls bank and packet buffer access. We guard
+ * this with ei_local->page_lock. Nobody should assume or set the page other
+ * than zero when the lock is not held. Lock holders must restore page 0
+ * before unlocking. Even pure readers must take the lock to protect in
+ * page 0.
+ *
+ * To make life difficult the chip can also be very slow. We therefore can't
+ * just use spinlocks. For the longer lockups we disable the irq the device
+ * sits on and hold the lock. We must hold the lock because there is a dual
+ * processor case other than interrupts (get stats/set multicast list in
+ * parallel with each other and transmit).
+ *
+ * Note: in theory we can just disable the irq on the card _but_ there is
+ * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
+ * enter lock, take the queued irq. So we waddle instead of flying.
+ *
+ * Finally by special arrangement for the purpose of being generally
+ * annoying the transmit function is called bh atomic. That places
+ * restrictions on the user context callers as disable_irq won't save
+ * them.
+ */
+
+
+
+/**
+ * ei_open - Open/initialize the board.
+ * @dev: network device to initialize
+ *
+ * This routine goes all-out, setting everything
+ * up anew at each open, even though many of these registers should only
+ * need to be set once at boot.
+ */
+static int __ei_open(struct net_device *dev)
+{
+ unsigned long flags;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+
+ /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout
+ wrapper that does e.g. media check & then calls ei_tx_timeout. */
+ if (dev->tx_timeout == NULL)
+ dev->tx_timeout = ei_tx_timeout;
+ if (dev->watchdog_timeo <= 0)
+ dev->watchdog_timeo = TX_TIMEOUT;
+
+ /*
+ * Grab the page lock so we own the register set, then call
+ * the init function.
+ */
+
+ spin_lock_irqsave(&ei_local->page_lock, flags);
+ __NS8390_init(dev, 1);
+ /* Set the flag before we drop the lock, That way the IRQ arrives
+ after its set and we get no silly warnings */
+ netif_start_queue(dev);
+ spin_unlock_irqrestore(&ei_local->page_lock, flags);
+ ei_local->irqlock = 0;
+ return 0;
+}
+
+/**
+ * ei_close - shut down network device
+ * @dev: network device to close
+ *
+ * Opposite of ei_open(). Only used when "ifconfig <devname> down" is done.
+ */
+static int __ei_close(struct net_device *dev)
+{
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ unsigned long flags;
+
+ /*
+ * Hold the page lock during close
+ */
+
+ spin_lock_irqsave(&ei_local->page_lock, flags);
+ __NS8390_init(dev, 0);
+ spin_unlock_irqrestore(&ei_local->page_lock, flags);
+ netif_stop_queue(dev);
+ return 0;
+}
+
+/**
+ * ei_tx_timeout - handle transmit time out condition
+ * @dev: network device which has apparently fallen asleep
+ *
+ * Called by kernel when device never acknowledges a transmit has
+ * completed (or failed) - i.e. never posted a Tx related interrupt.
+ */
+
+static void ei_tx_timeout(struct net_device *dev)
+{
+ unsigned long e8390_base = dev->base_addr;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ int txsr, isr, tickssofar = jiffies - dev->trans_start;
+ unsigned long flags;
+
+#if defined(CONFIG_M32R) && defined(CONFIG_SMP)
+ unsigned long icucr;
+
+ local_irq_save(flags);
+ icucr = inl(M32R_ICU_CR1_PORTL);
+ icucr |= M32R_ICUCR_ISMOD11;
+ outl(icucr, M32R_ICU_CR1_PORTL);
+ local_irq_restore(flags);
+#endif
+ ei_local->stat.tx_errors++;
+
+ spin_lock_irqsave(&ei_local->page_lock, flags);
+ txsr = ei_inb(e8390_base+EN0_TSR);
+ isr = ei_inb(e8390_base+EN0_ISR);
+ spin_unlock_irqrestore(&ei_local->page_lock, flags);
+
+ printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
+ dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
+ (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
+
+ if (!isr && !ei_local->stat.tx_packets)
+ {
+ /* The 8390 probably hasn't gotten on the cable yet. */
+ ei_local->interface_num ^= 1; /* Try a different xcvr. */
+ }
+
+ /* Ugly but a reset can be slow, yet must be protected */
+
+ disable_irq_nosync_lockdep(dev->irq);
+ spin_lock(&ei_local->page_lock);
+
+ /* Try to restart the card. Perhaps the user has fixed something. */
+ ei_reset_8390(dev);
+ __NS8390_init(dev, 1);
+
+ spin_unlock(&ei_local->page_lock);
+ enable_irq_lockdep(dev->irq);
+ netif_wake_queue(dev);
+}
+
+/**
+ * ei_start_xmit - begin packet transmission
+ * @skb: packet to be sent
+ * @dev: network device to which packet is sent
+ *
+ * Sends a packet to an 8390 network device.
+ */
+
+static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ unsigned long e8390_base = dev->base_addr;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ int send_length = skb->len, output_page;
+ unsigned long flags;
+ char buf[ETH_ZLEN];
+ char *data = skb->data;
+
+ if (skb->len < ETH_ZLEN) {
+ memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */
+ memcpy(buf, data, skb->len);
+ send_length = ETH_ZLEN;
+ data = buf;
+ }
+
+ /* Mask interrupts from the ethercard.
+ SMP: We have to grab the lock here otherwise the IRQ handler
+ on another CPU can flip window and race the IRQ mask set. We end
+ up trashing the mcast filter not disabling irqs if we don't lock */
+
+ spin_lock_irqsave(&ei_local->page_lock, flags);
+ ei_outb_p(0x00, e8390_base + EN0_IMR);
+ spin_unlock_irqrestore(&ei_local->page_lock, flags);
+
+
+ /*
+ * Slow phase with lock held.
+ */
+
+ disable_irq_nosync_lockdep_irqsave(dev->irq, &flags);
+
+ spin_lock(&ei_local->page_lock);
+
+ ei_local->irqlock = 1;
+
+ /*
+ * We have two Tx slots available for use. Find the first free
+ * slot, and then perform some sanity checks. With two Tx bufs,
+ * you get very close to transmitting back-to-back packets. With
+ * only one Tx buf, the transmitter sits idle while you reload the
+ * card, leaving a substantial gap between each transmitted packet.
+ */
+
+ if (ei_local->tx1 == 0)
+ {
+ output_page = ei_local->tx_start_page;
+ ei_local->tx1 = send_length;
+ if (ei_debug && ei_local->tx2 > 0)
+ printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
+ dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
+ }
+ else if (ei_local->tx2 == 0)
+ {
+ output_page = ei_local->tx_start_page + TX_PAGES/2;
+ ei_local->tx2 = send_length;
+ if (ei_debug && ei_local->tx1 > 0)
+ printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
+ dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
+ }
+ else
+ { /* We should never get here. */
+ if (ei_debug)
+ printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
+ dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
+ ei_local->irqlock = 0;
+ netif_stop_queue(dev);
+ ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
+ spin_unlock(&ei_local->page_lock);
+ enable_irq_lockdep_irqrestore(dev->irq, &flags);
+ ei_local->stat.tx_errors++;
+ return 1;
+ }
+
+ /*
+ * Okay, now upload the packet and trigger a send if the transmitter
+ * isn't already sending. If it is busy, the interrupt handler will
+ * trigger the send later, upon receiving a Tx done interrupt.
+ */
+
+ ei_block_output(dev, send_length, data, output_page);
+
+ if (! ei_local->txing)
+ {
+ ei_local->txing = 1;
+ NS8390_trigger_send(dev, send_length, output_page);
+ dev->trans_start = jiffies;
+ if (output_page == ei_local->tx_start_page)
+ {
+ ei_local->tx1 = -1;
+ ei_local->lasttx = -1;
+ }
+ else
+ {
+ ei_local->tx2 = -1;
+ ei_local->lasttx = -2;
+ }
+ }
+ else ei_local->txqueue++;
+
+ if (ei_local->tx1 && ei_local->tx2)
+ netif_stop_queue(dev);
+ else
+ netif_start_queue(dev);
+
+ /* Turn 8390 interrupts back on. */
+ ei_local->irqlock = 0;
+ ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
+
+ spin_unlock(&ei_local->page_lock);
+ enable_irq_lockdep_irqrestore(dev->irq, &flags);
+
+ dev_kfree_skb (skb);
+ ei_local->stat.tx_bytes += send_length;
+
+ return 0;
+}
+
+/**
+ * ei_interrupt - handle the interrupts from an 8390
+ * @irq: interrupt number
+ * @dev_id: a pointer to the net_device
+ *
+ * Handle the ether interface interrupts. We pull packets from
+ * the 8390 via the card specific functions and fire them at the networking
+ * stack. We also handle transmit completions and wake the transmit path if
+ * necessary. We also update the counters and do other housekeeping as
+ * needed.
+ */
+
+static irqreturn_t __ei_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ unsigned long e8390_base = dev->base_addr;
+ int interrupts, nr_serviced = 0;
+ struct ei_device *ei_local = netdev_priv(dev);
+
+ /*
+ * Protect the irq test too.
+ */
+
+ spin_lock(&ei_local->page_lock);
+
+ if (ei_local->irqlock)
+ {
+#if 1 /* This might just be an interrupt for a PCI device sharing this line */
+ /* The "irqlock" check is only for testing. */
+ printk(ei_local->irqlock
+ ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
+ : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
+ dev->name, ei_inb_p(e8390_base + EN0_ISR),
+ ei_inb_p(e8390_base + EN0_IMR));
+#endif
+ spin_unlock(&ei_local->page_lock);
+ return IRQ_NONE;
+ }
+
+ /* Change to page 0 and read the intr status reg. */
+ ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
+ if (ei_debug > 3)
+ printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
+ ei_inb_p(e8390_base + EN0_ISR));
+
+ /* !!Assumption!! -- we stay in page 0. Don't break this. */
+ while ((interrupts = ei_inb_p(e8390_base + EN0_ISR)) != 0
+ && ++nr_serviced < MAX_SERVICE)
+ {
+ if (!netif_running(dev)) {
+ printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
+ /* rmk - acknowledge the interrupts */
+ ei_outb_p(interrupts, e8390_base + EN0_ISR);
+ interrupts = 0;
+ break;
+ }
+ if (interrupts & ENISR_OVER)
+ ei_rx_overrun(dev);
+ else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
+ {
+ /* Got a good (?) packet. */
+ ei_receive(dev);
+ }
+ /* Push the next to-transmit packet through. */
+ if (interrupts & ENISR_TX)
+ ei_tx_intr(dev);
+ else if (interrupts & ENISR_TX_ERR)
+ ei_tx_err(dev);
+
+ if (interrupts & ENISR_COUNTERS)
+ {
+ ei_local->stat.rx_frame_errors += ei_inb_p(e8390_base + EN0_COUNTER0);
+ ei_local->stat.rx_crc_errors += ei_inb_p(e8390_base + EN0_COUNTER1);
+ ei_local->stat.rx_missed_errors+= ei_inb_p(e8390_base + EN0_COUNTER2);
+ ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
+ }
+
+ /* Ignore any RDC interrupts that make it back to here. */
+ if (interrupts & ENISR_RDC)
+ {
+ ei_outb_p(ENISR_RDC, e8390_base + EN0_ISR);
+ }
+
+ ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
+ }
+
+ if (interrupts && ei_debug)
+ {
+ ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
+ if (nr_serviced >= MAX_SERVICE)
+ {
+ /* 0xFF is valid for a card removal */
+ if(interrupts!=0xFF)
+ printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
+ dev->name, interrupts);
+ ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
+ } else {
+ printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
+ ei_outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
+ }
+ }
+ spin_unlock(&ei_local->page_lock);
+ return IRQ_RETVAL(nr_serviced > 0);
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void __ei_poll(struct net_device *dev)
+{
+ disable_irq_lockdep(dev->irq);
+ __ei_interrupt(dev->irq, dev);
+ enable_irq_lockdep(dev->irq);
+}
+#endif
+
+/**
+ * ei_tx_err - handle transmitter error
+ * @dev: network device which threw the exception
+ *
+ * A transmitter error has happened. Most likely excess collisions (which
+ * is a fairly normal condition). If the error is one where the Tx will
+ * have been aborted, we try and send another one right away, instead of
+ * letting the failed packet sit and collect dust in the Tx buffer. This
+ * is a much better solution as it avoids kernel based Tx timeouts, and
+ * an unnecessary card reset.
+ *
+ * Called with lock held.
+ */
+
+static void ei_tx_err(struct net_device *dev)
+{
+ unsigned long e8390_base = dev->base_addr;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ unsigned char txsr = ei_inb_p(e8390_base+EN0_TSR);
+ unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
+
+#ifdef VERBOSE_ERROR_DUMP
+ printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
+ if (txsr & ENTSR_ABT)
+ printk("excess-collisions ");
+ if (txsr & ENTSR_ND)
+ printk("non-deferral ");
+ if (txsr & ENTSR_CRS)
+ printk("lost-carrier ");
+ if (txsr & ENTSR_FU)
+ printk("FIFO-underrun ");
+ if (txsr & ENTSR_CDH)
+ printk("lost-heartbeat ");
+ printk("\n");
+#endif
+
+ ei_outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
+
+ if (tx_was_aborted)
+ ei_tx_intr(dev);
+ else
+ {
+ ei_local->stat.tx_errors++;
+ if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
+ if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
+ if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++;
+ }
+}
+
+/**
+ * ei_tx_intr - transmit interrupt handler
+ * @dev: network device for which tx intr is handled
+ *
+ * We have finished a transmit: check for errors and then trigger the next
+ * packet to be sent. Called with lock held.
+ */
+
+static void ei_tx_intr(struct net_device *dev)
+{
+ unsigned long e8390_base = dev->base_addr;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ int status = ei_inb(e8390_base + EN0_TSR);
+
+ ei_outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
+
+ /*
+ * There are two Tx buffers, see which one finished, and trigger
+ * the send of another one if it exists.
+ */
+ ei_local->txqueue--;
+
+ if (ei_local->tx1 < 0)
+ {
+ if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
+ printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
+ ei_local->name, ei_local->lasttx, ei_local->tx1);
+ ei_local->tx1 = 0;
+ if (ei_local->tx2 > 0)
+ {
+ ei_local->txing = 1;
+ NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
+ dev->trans_start = jiffies;
+ ei_local->tx2 = -1,
+ ei_local->lasttx = 2;
+ }
+ else ei_local->lasttx = 20, ei_local->txing = 0;
+ }
+ else if (ei_local->tx2 < 0)
+ {
+ if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
+ printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
+ ei_local->name, ei_local->lasttx, ei_local->tx2);
+ ei_local->tx2 = 0;
+ if (ei_local->tx1 > 0)
+ {
+ ei_local->txing = 1;
+ NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
+ dev->trans_start = jiffies;
+ ei_local->tx1 = -1;
+ ei_local->lasttx = 1;
+ }
+ else
+ ei_local->lasttx = 10, ei_local->txing = 0;
+ }
+// else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
+// dev->name, ei_local->lasttx);
+
+ /* Minimize Tx latency: update the statistics after we restart TXing. */
+ if (status & ENTSR_COL)
+ ei_local->stat.collisions++;
+ if (status & ENTSR_PTX)
+ ei_local->stat.tx_packets++;
+ else
+ {
+ ei_local->stat.tx_errors++;
+ if (status & ENTSR_ABT)
+ {
+ ei_local->stat.tx_aborted_errors++;
+ ei_local->stat.collisions += 16;
+ }
+ if (status & ENTSR_CRS)
+ ei_local->stat.tx_carrier_errors++;
+ if (status & ENTSR_FU)
+ ei_local->stat.tx_fifo_errors++;
+ if (status & ENTSR_CDH)
+ ei_local->stat.tx_heartbeat_errors++;
+ if (status & ENTSR_OWC)
+ ei_local->stat.tx_window_errors++;
+ }
+ netif_wake_queue(dev);
+}
+
+/**
+ * ei_receive - receive some packets
+ * @dev: network device with which receive will be run
+ *
+ * We have a good packet(s), get it/them out of the buffers.
+ * Called with lock held.
+ */
+
+static void ei_receive(struct net_device *dev)
+{
+ unsigned long e8390_base = dev->base_addr;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ unsigned char rxing_page, this_frame, next_frame;
+ unsigned short current_offset;
+ int rx_pkt_count = 0;
+ struct e8390_pkt_hdr rx_frame;
+ int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
+
+ while (++rx_pkt_count < 10)
+ {
+ int pkt_len, pkt_stat;
+
+ /* Get the rx page (incoming packet pointer). */
+ ei_outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
+ rxing_page = ei_inb_p(e8390_base + EN1_CURPAG);
+ ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
+
+ /* Remove one frame from the ring. Boundary is always a page behind. */
+ this_frame = ei_inb_p(e8390_base + EN0_BOUNDARY) + 1;
+ if (this_frame >= ei_local->stop_page)
+ this_frame = ei_local->rx_start_page;
+
+ /* Someday we'll omit the previous, iff we never get this message.
+ (There is at least one clone claimed to have a problem.)
+
+ Keep quiet if it looks like a card removal. One problem here
+ is that some clones crash in roughly the same way.
+ */
+ if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
+ printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
+ dev->name, this_frame, ei_local->current_page);
+
+ if (this_frame == rxing_page) /* Read all the frames? */
+ break; /* Done for now */
+
+ current_offset = this_frame << 8;
+ ei_get_8390_hdr(dev, &rx_frame, this_frame);
+
+ pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
+ pkt_stat = rx_frame.status;
+
+ next_frame = this_frame + 1 + ((pkt_len+4)>>8);
+
+ /* Check for bogosity warned by 3c503 book: the status byte is never
+ written. This happened a lot during testing! This code should be
+ cleaned up someday. */
+ if (rx_frame.next != next_frame
+ && rx_frame.next != next_frame + 1
+ && rx_frame.next != next_frame - num_rx_pages
+ && rx_frame.next != next_frame + 1 - num_rx_pages) {
+ ei_local->current_page = rxing_page;
+ ei_outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
+ ei_local->stat.rx_errors++;
+ continue;
+ }
+
+ if (pkt_len < 60 || pkt_len > 1518)
+ {
+ if (ei_debug)
+ printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
+ dev->name, rx_frame.count, rx_frame.status,
+ rx_frame.next);
+ ei_local->stat.rx_errors++;
+ ei_local->stat.rx_length_errors++;
+ }
+ else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
+ {
+ struct sk_buff *skb;
+
+ skb = dev_alloc_skb(pkt_len+2);
+ if (skb == NULL)
+ {
+ if (ei_debug > 1)
+ printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
+ dev->name, pkt_len);
+ ei_local->stat.rx_dropped++;
+ break;
+ }
+ else
+ {
+ skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
+ skb->dev = dev;
+ skb_put(skb, pkt_len); /* Make room */
+ ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
+ skb->protocol=eth_type_trans(skb,dev);
+ netif_rx(skb);
+ dev->last_rx = jiffies;
+ ei_local->stat.rx_packets++;
+ ei_local->stat.rx_bytes += pkt_len;
+ if (pkt_stat & ENRSR_PHY)
+ ei_local->stat.multicast++;
+ }
+ }
+ else
+ {
+ if (ei_debug)
+ printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
+ dev->name, rx_frame.status, rx_frame.next,
+ rx_frame.count);
+ ei_local->stat.rx_errors++;
+ /* NB: The NIC counts CRC, frame and missed errors. */
+ if (pkt_stat & ENRSR_FO)
+ ei_local->stat.rx_fifo_errors++;
+ }
+ next_frame = rx_frame.next;
+
+ /* This _should_ never happen: it's here for avoiding bad clones. */
+ if (next_frame >= ei_local->stop_page) {
+ printk("%s: next frame inconsistency, %#2x\n", dev->name,
+ next_frame);
+ next_frame = ei_local->rx_start_page;
+ }
+ ei_local->current_page = next_frame;
+ ei_outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
+ }
+
+ /* We used to also ack ENISR_OVER here, but that would sometimes mask
+ a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
+ ei_outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
+ return;
+}
+
+/**
+ * ei_rx_overrun - handle receiver overrun
+ * @dev: network device which threw exception
+ *
+ * We have a receiver overrun: we have to kick the 8390 to get it started
+ * again. Problem is that you have to kick it exactly as NS prescribes in
+ * the updated datasheets, or "the NIC may act in an unpredictable manner."
+ * This includes causing "the NIC to defer indefinitely when it is stopped
+ * on a busy network." Ugh.
+ * Called with lock held. Don't call this with the interrupts off or your
+ * computer will hate you - it takes 10ms or so.
+ */
+
+static void ei_rx_overrun(struct net_device *dev)
+{
+ unsigned long e8390_base = dev->base_addr;
+ unsigned char was_txing, must_resend = 0;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+
+ /*
+ * Record whether a Tx was in progress and then issue the
+ * stop command.
+ */
+ was_txing = ei_inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
+ ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
+
+ if (ei_debug > 1)
+ printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
+ ei_local->stat.rx_over_errors++;
+
+ /*
+ * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
+ * Early datasheets said to poll the reset bit, but now they say that
+ * it "is not a reliable indicator and subsequently should be ignored."
+ * We wait at least 10ms.
+ */
+
+ mdelay(10);
+
+ /*
+ * Reset RBCR[01] back to zero as per magic incantation.
+ */
+ ei_outb_p(0x00, e8390_base+EN0_RCNTLO);
+ ei_outb_p(0x00, e8390_base+EN0_RCNTHI);
+
+ /*
+ * See if any Tx was interrupted or not. According to NS, this
+ * step is vital, and skipping it will cause no end of havoc.
+ */
+
+ if (was_txing)
+ {
+ unsigned char tx_completed = ei_inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
+ if (!tx_completed)
+ must_resend = 1;
+ }
+
+ /*
+ * Have to enter loopback mode and then restart the NIC before
+ * you are allowed to slurp packets up off the ring.
+ */
+ ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
+
+ /*
+ * Clear the Rx ring of all the debris, and ack the interrupt.
+ */
+ ei_receive(dev);
+ ei_outb_p(ENISR_OVER, e8390_base+EN0_ISR);
+
+ /*
+ * Leave loopback mode, and resend any packet that got stopped.
+ */
+ ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
+ if (must_resend)
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
+}
+
+/*
+ * Collect the stats. This is called unlocked and from several contexts.
+ */
+
+static struct net_device_stats *get_stats(struct net_device *dev)
+{
+ unsigned long ioaddr = dev->base_addr;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ unsigned long flags;
+
+ /* If the card is stopped, just return the present stats. */
+ if (!netif_running(dev))
+ return &ei_local->stat;
+
+ spin_lock_irqsave(&ei_local->page_lock,flags);
+ /* Read the counter registers, assuming we are in page 0. */
+ ei_local->stat.rx_frame_errors += ei_inb_p(ioaddr + EN0_COUNTER0);
+ ei_local->stat.rx_crc_errors += ei_inb_p(ioaddr + EN0_COUNTER1);
+ ei_local->stat.rx_missed_errors+= ei_inb_p(ioaddr + EN0_COUNTER2);
+ spin_unlock_irqrestore(&ei_local->page_lock, flags);
+
+ return &ei_local->stat;
+}
+
+/*
+ * Form the 64 bit 8390 multicast table from the linked list of addresses
+ * associated with this dev structure.
+ */
+
+static inline void make_mc_bits(u8 *bits, struct net_device *dev)
+{
+ struct dev_mc_list *dmi;
+
+ for (dmi=dev->mc_list; dmi; dmi=dmi->next)
+ {
+ u32 crc;
+ if (dmi->dmi_addrlen != ETH_ALEN)
+ {
+ printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
+ continue;
+ }
+ crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
+ /*
+ * The 8390 uses the 6 most significant bits of the
+ * CRC to index the multicast table.
+ */
+ bits[crc>>29] |= (1<<((crc>>26)&7));
+ }
+}
+
+/**
+ * do_set_multicast_list - set/clear multicast filter
+ * @dev: net device for which multicast filter is adjusted
+ *
+ * Set or clear the multicast filter for this adaptor. May be called
+ * from a BH in 2.1.x. Must be called with lock held.
+ */
+
+static void do_set_multicast_list(struct net_device *dev)
+{
+ unsigned long e8390_base = dev->base_addr;
+ int i;
+ struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
+
+ if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI)))
+ {
+ memset(ei_local->mcfilter, 0, 8);
+ if (dev->mc_list)
+ make_mc_bits(ei_local->mcfilter, dev);
+ }
+ else
+ memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */
+
+ /*
+ * DP8390 manuals don't specify any magic sequence for altering
+ * the multicast regs on an already running card. To be safe, we
+ * ensure multicast mode is off prior to loading up the new hash
+ * table. If this proves to be not enough, we can always resort
+ * to stopping the NIC, loading the table and then restarting.
+ *
+ * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC
+ * Elite16) appear to be write-only. The NS 8390 data sheet lists
+ * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and
+ * Ultra32 EISA) appears to have this bug fixed.
+ */
+
+ if (netif_running(dev))
+ ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
+ ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
+ for(i = 0; i < 8; i++)
+ {
+ ei_outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
+#ifndef BUG_83C690
+ if(ei_inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i])
+ printk(KERN_ERR "Multicast filter read/write mismap %d\n",i);
+#endif
+ }
+ ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
+
+ if(dev->flags&IFF_PROMISC)
+ ei_outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR);
+ else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
+ ei_outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR);
+ else
+ ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
+ }
+
+/*
+ * Called without lock held. This is invoked from user context and may
+ * be parallel to just about everything else. Its also fairly quick and
+ * not called too often. Must protect against both bh and irq users
+ */
+
+static void set_multicast_list(struct net_device *dev)
+{
+ unsigned long flags;
+ struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
+
+ spin_lock_irqsave(&ei_local->page_lock, flags);
+ do_set_multicast_list(dev);
+ spin_unlock_irqrestore(&ei_local->page_lock, flags);
+}
+
+/**
+ * ethdev_setup - init rest of 8390 device struct
+ * @dev: network device structure to init
+ *
+ * Initialize the rest of the 8390 device structure. Do NOT __init
+ * this, as it is used by 8390 based modular drivers too.
+ */
+
+static void ethdev_setup(struct net_device *dev)
+{
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ if (ei_debug > 1)
+ printk(version);
+
+ dev->hard_start_xmit = &ei_start_xmit;
+ dev->get_stats = get_stats;
+ dev->set_multicast_list = &set_multicast_list;
+
+ ether_setup(dev);
+
+ spin_lock_init(&ei_local->page_lock);
+}
+
+/**
+ * alloc_ei_netdev - alloc_etherdev counterpart for 8390
+ * @size: extra bytes to allocate
+ *
+ * Allocate 8390-specific net_device.
+ */
+static struct net_device *____alloc_ei_netdev(int size)
+{
+ return alloc_netdev(sizeof(struct ei_device) + size, "eth%d",
+ ethdev_setup);
+}
+
+
+
+
+/* This page of functions should be 8390 generic */
+/* Follow National Semi's recommendations for initializing the "NIC". */
+
+/**
+ * NS8390_init - initialize 8390 hardware
+ * @dev: network device to initialize
+ * @startp: boolean. non-zero value to initiate chip processing
+ *
+ * Must be called with lock held.
+ */
+
+static void __NS8390_init(struct net_device *dev, int startp)
+{
+ unsigned long e8390_base = dev->base_addr;
+ struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
+ int i;
+ int endcfg = ei_local->word16
+ ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0))
+ : 0x48;
+
+ if(sizeof(struct e8390_pkt_hdr)!=4)
+ panic("8390.c: header struct mispacked\n");
+ /* Follow National Semi's recommendations for initing the DP83902. */
+ ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
+ ei_outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
+ /* Clear the remote byte count registers. */
+ ei_outb_p(0x00, e8390_base + EN0_RCNTLO);
+ ei_outb_p(0x00, e8390_base + EN0_RCNTHI);
+ /* Set to monitor and loopback mode -- this is vital!. */
+ ei_outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
+ ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
+ /* Set the transmit page and receive ring. */
+ ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
+ ei_local->tx1 = ei_local->tx2 = 0;
+ ei_outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
+ ei_outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
+ ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
+ ei_outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
+ /* Clear the pending interrupts and mask. */
+ ei_outb_p(0xFF, e8390_base + EN0_ISR);
+ ei_outb_p(0x00, e8390_base + EN0_IMR);
+
+ /* Copy the station address into the DS8390 registers. */
+
+ ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
+ for(i = 0; i < 6; i++)
+ {
+ ei_outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
+ if (ei_debug > 1 && ei_inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
+ printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
+ }
+
+ ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
+ ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
+
+ netif_start_queue(dev);
+ ei_local->tx1 = ei_local->tx2 = 0;
+ ei_local->txing = 0;
+
+ if (startp)
+ {
+ ei_outb_p(0xff, e8390_base + EN0_ISR);
+ ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
+ ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
+ ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
+ /* 3c503 TechMan says rxconfig only after the NIC is started. */
+ ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
+ do_set_multicast_list(dev); /* (re)load the mcast table */
+ }
+}
+
+/* Trigger a transmit start, assuming the length is valid.
+ Always called with the page lock held */
+
+static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
+ int start_page)
+{
+ unsigned long e8390_base = dev->base_addr;
+ struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
+
+ ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD);
+
+ if (ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS)
+ {
+ printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
+ dev->name);
+ return;
+ }
+ ei_outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
+ ei_outb_p(length >> 8, e8390_base + EN0_TCNTHI);
+ ei_outb_p(start_page, e8390_base + EN0_TPSR);
+ ei_outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
+}