[PATCH net v2 05/15] drivers: net: amd: lance: Remove this driver

Andrew Lunn
2026-04-22T18:02:39Z

The lance was written by Donald Becker between 1993-1998. It is an ISA
device, so unlikely to be used with modern kernels.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
---
drivers/net/ethernet/amd/Kconfig | 11 -
drivers/net/ethernet/amd/Makefile | 1 -
drivers/net/ethernet/amd/lance.c | 1317 -------------------------------------
3 files changed, 1329 deletions(-)

diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig
index 45e8d698781c..c5abb81977dd 100644
--- a/drivers/net/ethernet/amd/Kconfig
+++ b/drivers/net/ethernet/amd/Kconfig
@@ -43,17 +43,6 @@ config AMD8111_ETH
To compile this driver as a module, choose M here. The module
will be called amd8111e.

-config LANCE
- tristate "AMD LANCE and PCnet (AT1500 and NE2100) support"
- depends on ISA && ISA_DMA_API && !ARM && !PPC32
- select NETDEV_LEGACY_INIT
- help
- If you have a network (Ethernet) card of this type, say Y here.
- Some LinkSys cards are of this type.
-
- To compile this driver as a module, choose M here: the module
- will be called lance. This is recommended.
-
config PCNET32
tristate "AMD PCnet32 PCI support"
depends on PCI && HAS_IOPORT
diff --git a/drivers/net/ethernet/amd/Makefile b/drivers/net/ethernet/amd/Makefile
index 2dcfb84731e1..f261501f7324 100644
--- a/drivers/net/ethernet/amd/Makefile
+++ b/drivers/net/ethernet/amd/Makefile
@@ -9,7 +9,6 @@ obj-$(CONFIG_ARIADNE) += ariadne.o
obj-$(CONFIG_ATARILANCE) += atarilance.o
obj-$(CONFIG_DECLANCE) += declance.o
obj-$(CONFIG_HPLANCE) += hplance.o 7990.o
-obj-$(CONFIG_LANCE) += lance.o
obj-$(CONFIG_MIPS_AU1X00_ENET) += au1000_eth.o
obj-$(CONFIG_MVME147_NET) += mvme147.o 7990.o
obj-$(CONFIG_PCMCIA_NMCLAN) += nmclan_cs.o
diff --git a/drivers/net/ethernet/amd/lance.c b/drivers/net/ethernet/amd/lance.c
deleted file mode 100644
index 98afd8cb0efb..000000000000
--- a/drivers/net/ethernet/amd/lance.c
+++ /dev/null
@@ -1,1317 +0,0 @@
-/* lance.c: An AMD LANCE/PCnet ethernet driver for Linux. */
-/*
- Written/copyright 1993-1998 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.
-
- This driver is for the Allied Telesis AT1500 and HP J2405A, and should work
- with most other LANCE-based bus-master (NE2100/NE2500) ethercards.
-
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
-
- Andrey V. Savochkin:
- - alignment problem with 1.3.* kernel and some minor changes.
- Thomas Bogendoerfer (tsbogend@bigbug.franken.de):
- - added support for Linux/Alpha, but removed most of it, because
- it worked only for the PCI chip.
- - added hook for the 32bit lance driver
- - added PCnetPCI II (79C970A) to chip table
- Paul Gortmaker (gpg109@rsphy1.anu.edu.au):
- - hopefully fix above so Linux/Alpha can use ISA cards too.
- 8/20/96 Fixed 7990 autoIRQ failure and reversed unneeded alignment -djb
- v1.12 10/27/97 Module support -djb
- v1.14 2/3/98 Module support modified, made PCI support optional -djb
- v1.15 5/27/99 Fixed bug in the cleanup_module(). dev->priv was freed
- before unregister_netdev() which caused NULL pointer
- reference later in the chain (in rtnetlink_fill_ifinfo())
- -- Mika Kuoppala <miku@iki.fi>
-
- Forward ported v1.14 to 2.1.129, merged the PCI and misc changes from
- the 2.1 version of the old driver - Alan Cox
-
- Get rid of check_region, check kmalloc return in lance_probe1
- Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001
-
- Reworked detection, added support for Racal InterLan EtherBlaster cards
- Vesselin Kostadinov <vesok at yahoo dot com > - 22/4/2004
-*/
-
-static const char version[] = "lance.c:v1.16 2006/11/09 dplatt@3do.com, becker@cesdis.gsfc.nasa.gov\n";
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/mm.h>
-#include <linux/bitops.h>
-#include <net/Space.h>
-
-#include <asm/io.h>
-#include <asm/dma.h>
-
-static unsigned int lance_portlist[] __initdata = { 0x300, 0x320, 0x340, 0x360, 0};
-static int lance_probe1(struct net_device *dev, int ioaddr, int irq, int options);
-static int __init do_lance_probe(struct net_device *dev);
-
-
-static struct card {
- char id_offset14;
- char id_offset15;
-} cards[] = {
- { //"normal"
- .id_offset14 = 0x57,
- .id_offset15 = 0x57,
- },
- { //NI6510EB
- .id_offset14 = 0x52,
- .id_offset15 = 0x44,
- },
- { //Racal InterLan EtherBlaster
- .id_offset14 = 0x52,
- .id_offset15 = 0x49,
- },
-};
-#define NUM_CARDS 3
-
-#ifdef LANCE_DEBUG
-static int lance_debug = LANCE_DEBUG;
-#else
-static int lance_debug = 1;
-#endif
-
-/*
- Theory of Operation
-
-I. Board Compatibility
-
-This device driver is designed for the AMD 79C960, the "PCnet-ISA
-single-chip ethernet controller for ISA". This chip is used in a wide
-variety of boards from vendors such as Allied Telesis, HP, Kingston,
-and Boca. This driver is also intended to work with older AMD 7990
-designs, such as the NE1500 and NE2100, and newer 79C961. For convenience,
-I use the name LANCE to refer to all of the AMD chips, even though it properly
-refers only to the original 7990.
-
-II. Board-specific settings
-
-The driver is designed to work the boards that use the faster
-bus-master mode, rather than in shared memory mode. (Only older designs
-have on-board buffer memory needed to support the slower shared memory mode.)
-
-Most ISA boards have jumpered settings for the I/O base, IRQ line, and DMA
-channel. This driver probes the likely base addresses:
-{0x300, 0x320, 0x340, 0x360}.
-After the board is found it generates a DMA-timeout interrupt and uses
-autoIRQ to find the IRQ line. The DMA channel can be set with the low bits
-of the otherwise-unused dev->mem_start value (aka PARAM1). If unset it is
-probed for by enabling each free DMA channel in turn and checking if
-initialization succeeds.
-
-The HP-J2405A board is an exception: with this board it is easy to read the
-EEPROM-set values for the base, IRQ, and DMA. (Of course you must already
-_know_ the base address -- that field is for writing the EEPROM.)
-
-III. Driver operation
-
-IIIa. Ring buffers
-The LANCE uses ring buffers of Tx and Rx descriptors. Each entry describes
-the base and length of the data buffer, along with status bits. The length
-of these buffers is set by LANCE_LOG_{RX,TX}_BUFFERS, which is log_2() of
-the buffer length (rather than being directly the buffer length) for
-implementation ease. The current values are 2 (Tx) and 4 (Rx), which leads to
-ring sizes of 4 (Tx) and 16 (Rx). Increasing the number of ring entries
-needlessly uses extra space and reduces the chance that an upper layer will
-be able to reorder queued Tx packets based on priority. Decreasing the number
-of entries makes it more difficult to achieve back-to-back packet transmission
-and increases the chance that Rx ring will overflow. (Consider the worst case
-of receiving back-to-back minimum-sized packets.)
-
-The LANCE has the capability to "chain" both Rx and Tx buffers, but this driver
-statically allocates full-sized (slightly oversized -- PKT_BUF_SZ) buffers to
-avoid the administrative overhead. For the Rx side this avoids dynamically
-allocating full-sized buffers "just in case", at the expense of a
-memory-to-memory data copy for each packet received. For most systems this
-is a good tradeoff: the Rx buffer will always be in low memory, the copy
-is inexpensive, and it primes the cache for later packet processing. For Tx
-the buffers are only used when needed as low-memory bounce buffers.
-
-IIIB. 16M memory limitations.
-For the ISA bus master mode all structures used directly by the LANCE,
-the initialization block, Rx and Tx rings, and data buffers, must be
-accessible from the ISA bus, i.e. in the lower 16M of real memory.
-This is a problem for current Linux kernels on >16M machines. The network
-devices are initialized after memory initialization, and the kernel doles out
-memory from the top of memory downward. The current solution is to have a
-special network initialization routine that's called before memory
-initialization; this will eventually be generalized for all network devices.
-As mentioned before, low-memory "bounce-buffers" are used when needed.
-
-IIIC. Synchronization
-The driver runs as two independent, single-threaded flows of control. One
-is the send-packet routine, which enforces single-threaded use by the
-dev->tbusy flag. The other thread is the interrupt handler, which is single
-threaded by the hardware and other software.
-
-The send packet thread has partial control over the Tx ring and 'dev->tbusy'
-flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
-queue slot is empty, it clears the tbusy flag when finished otherwise it sets
-the 'lp->tx_full' flag.
-
-The interrupt handler has exclusive control over the Rx ring and records stats
-from the Tx ring. (The Tx-done interrupt can't be selectively turned off, so
-we can't avoid the interrupt overhead by having the Tx routine reap the Tx
-stats.) After reaping the stats, it marks the queue entry as empty by setting
-the 'base' to zero. Iff the 'lp->tx_full' flag is set, it clears both the
-tx_full and tbusy flags.
-
-*/
-
-/* Set the number of Tx and Rx buffers, using Log_2(# buffers).
- Reasonable default values are 16 Tx buffers, and 16 Rx buffers.
- That translates to 4 and 4 (16 == 2^^4).
- This is a compile-time option for efficiency.
- */
-#ifndef LANCE_LOG_TX_BUFFERS
-#define LANCE_LOG_TX_BUFFERS 4
-#define LANCE_LOG_RX_BUFFERS 4
-#endif
-
-#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
-#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
-#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
-
-#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
-#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
-#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
-
-#define PKT_BUF_SZ 1544
-
-/* Offsets from base I/O address. */
-#define LANCE_DATA 0x10
-#define LANCE_ADDR 0x12
-#define LANCE_RESET 0x14
-#define LANCE_BUS_IF 0x16
-#define LANCE_TOTAL_SIZE 0x18
-
-#define TX_TIMEOUT (HZ/5)
-
-/* The LANCE Rx and Tx ring descriptors. */
-struct lance_rx_head {
- s32 base;
- s16 buf_length; /* This length is 2s complement (negative)! */
- s16 msg_length; /* This length is "normal". */
-};
-
-struct lance_tx_head {
- s32 base;
- s16 length; /* Length is 2s complement (negative)! */
- s16 misc;
-};
-
-/* The LANCE initialization block, described in databook. */
-struct lance_init_block {
- u16 mode; /* Pre-set mode (reg. 15) */
- u8 phys_addr[6]; /* Physical ethernet address */
- u32 filter[2]; /* Multicast filter (unused). */
- /* Receive and transmit ring base, along with extra bits. */
- u32 rx_ring; /* Tx and Rx ring base pointers */
- u32 tx_ring;
-};
-
-struct lance_private {
- /* The Tx and Rx ring entries must be aligned on 8-byte boundaries. */
- struct lance_rx_head rx_ring[RX_RING_SIZE];
- struct lance_tx_head tx_ring[TX_RING_SIZE];
- struct lance_init_block init_block;
- const char *name;
- /* The saved address of a sent-in-place packet/buffer, for skfree(). */
- struct sk_buff* tx_skbuff[TX_RING_SIZE];
- /* The addresses of receive-in-place skbuffs. */
- struct sk_buff* rx_skbuff[RX_RING_SIZE];
- unsigned long rx_buffs; /* Address of Rx and Tx buffers. */
- /* Tx low-memory "bounce buffer" address. */
- char (*tx_bounce_buffs)[PKT_BUF_SZ];
- int cur_rx, cur_tx; /* The next free ring entry */
- int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */
- int dma;
- unsigned char chip_version; /* See lance_chip_type. */
- spinlock_t devlock;
-};
-
-#define LANCE_MUST_PAD 0x00000001
-#define LANCE_ENABLE_AUTOSELECT 0x00000002
-#define LANCE_MUST_REINIT_RING 0x00000004
-#define LANCE_MUST_UNRESET 0x00000008
-#define LANCE_HAS_MISSED_FRAME 0x00000010
-
-/* A mapping from the chip ID number to the part number and features.
- These are from the datasheets -- in real life the '970 version
- reportedly has the same ID as the '965. */
-static struct lance_chip_type {
- int id_number;
- const char *name;
- int flags;
-} chip_table[] = {
- {0x0000, "LANCE 7990", /* Ancient lance chip. */
- LANCE_MUST_PAD + LANCE_MUST_UNRESET},
- {0x0003, "PCnet/ISA 79C960", /* 79C960 PCnet/ISA. */
- LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
- LANCE_HAS_MISSED_FRAME},
- {0x2260, "PCnet/ISA+ 79C961", /* 79C961 PCnet/ISA+, Plug-n-Play. */
- LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
- LANCE_HAS_MISSED_FRAME},
- {0x2420, "PCnet/PCI 79C970", /* 79C970 or 79C974 PCnet-SCSI, PCI. */
- LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
- LANCE_HAS_MISSED_FRAME},
- /* Bug: the PCnet/PCI actually uses the PCnet/VLB ID number, so just call
- it the PCnet32. */
- {0x2430, "PCnet32", /* 79C965 PCnet for VL bus. */
- LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
- LANCE_HAS_MISSED_FRAME},
- {0x2621, "PCnet/PCI-II 79C970A", /* 79C970A PCInetPCI II. */
- LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
- LANCE_HAS_MISSED_FRAME},
- {0x0, "PCnet (unknown)",
- LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING +
- LANCE_HAS_MISSED_FRAME},
-};
-
-enum {OLD_LANCE = 0, PCNET_ISA=1, PCNET_ISAP=2, PCNET_PCI=3, PCNET_VLB=4, PCNET_PCI_II=5, LANCE_UNKNOWN=6};
-
-
-/* Non-zero if lance_probe1() needs to allocate low-memory bounce buffers.
- Assume yes until we know the memory size. */
-static unsigned char lance_need_isa_bounce_buffers = 1;
-
-static int lance_open(struct net_device *dev);
-static void lance_init_ring(struct net_device *dev, gfp_t mode);
-static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
- struct net_device *dev);
-static int lance_rx(struct net_device *dev);
-static irqreturn_t lance_interrupt(int irq, void *dev_id);
-static int lance_close(struct net_device *dev);
-static struct net_device_stats *lance_get_stats(struct net_device *dev);
-static void set_multicast_list(struct net_device *dev);
-static void lance_tx_timeout (struct net_device *dev, unsigned int txqueue);
-
-
-
-#ifdef MODULE
-#define MAX_CARDS 8 /* Max number of interfaces (cards) per module */
-
-static struct net_device *dev_lance[MAX_CARDS];
-static int io[MAX_CARDS];
-static int dma[MAX_CARDS];
-static int irq[MAX_CARDS];
-
-module_param_hw_array(io, int, ioport, NULL, 0);
-module_param_hw_array(dma, int, dma, NULL, 0);
-module_param_hw_array(irq, int, irq, NULL, 0);
-module_param(lance_debug, int, 0);
-MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required");
-MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)");
-MODULE_PARM_DESC(irq, "LANCE/PCnet IRQ number (ignored for some devices)");
-MODULE_PARM_DESC(lance_debug, "LANCE/PCnet debug level (0-7)");
-
-static int __init lance_init_module(void)
-{
- struct net_device *dev;
- int this_dev, found = 0;
-
- for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
- if (io[this_dev] == 0) {
- if (this_dev != 0) /* only complain once */
- break;
- printk(KERN_NOTICE "lance.c: Module autoprobing not allowed. Append \"io=0xNNN\" value(s).\n");
- return -EPERM;
- }
- dev = alloc_etherdev(0);
- if (!dev)
- break;
- dev->irq = irq[this_dev];
- dev->base_addr = io[this_dev];
- dev->dma = dma[this_dev];
- if (do_lance_probe(dev) == 0) {
- dev_lance[found++] = dev;
- continue;
- }
- free_netdev(dev);
- break;
- }
- if (found != 0)
- return 0;
- return -ENXIO;
-}
-module_init(lance_init_module);
-
-static void cleanup_card(struct net_device *dev)
-{
- struct lance_private *lp = dev->ml_priv;
- if (dev->dma != 4)
- free_dma(dev->dma);
- release_region(dev->base_addr, LANCE_TOTAL_SIZE);
- kfree(lp->tx_bounce_buffs);
- kfree((void*)lp->rx_buffs);
- kfree(lp);
-}
-
-static void __exit lance_cleanup_module(void)
-{
- int this_dev;
-
- for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) {
- struct net_device *dev = dev_lance[this_dev];
- if (dev) {
- unregister_netdev(dev);
- cleanup_card(dev);
- free_netdev(dev);
- }
- }
-}
-module_exit(lance_cleanup_module);
-#endif /* MODULE */
-MODULE_DESCRIPTION("AMD LANCE/PCnet Ethernet driver");
-MODULE_LICENSE("GPL");
-
-
-/* Starting in v2.1.*, the LANCE/PCnet probe is now similar to the other
- board probes now that kmalloc() can allocate ISA DMA-able regions.
- This also allows the LANCE driver to be used as a module.
- */
-static int __init do_lance_probe(struct net_device *dev)
-{
- unsigned int *port;
- int result;
-
- if (high_memory <= phys_to_virt(16*1024*1024))
- lance_need_isa_bounce_buffers = 0;
-
- for (port = lance_portlist; *port; port++) {
- int ioaddr = *port;
- struct resource *r = request_region(ioaddr, LANCE_TOTAL_SIZE,
- "lance-probe");
-
- if (r) {
- /* Detect the card with minimal I/O reads */
- char offset14 = inb(ioaddr + 14);
- int card;
- for (card = 0; card < NUM_CARDS; ++card)
- if (cards[card].id_offset14 == offset14)
- break;
- if (card < NUM_CARDS) {/*yes, the first byte matches*/
- char offset15 = inb(ioaddr + 15);
- for (card = 0; card < NUM_CARDS; ++card)
- if ((cards[card].id_offset14 == offset14) &&
- (cards[card].id_offset15 == offset15))
- break;
- }
- if (card < NUM_CARDS) { /*Signature OK*/
- result = lance_probe1(dev, ioaddr, 0, 0);
- if (!result) {
- struct lance_private *lp = dev->ml_priv;
- int ver = lp->chip_version;
-
- r->name = chip_table[ver].name;
- return 0;
- }
- }
- release_region(ioaddr, LANCE_TOTAL_SIZE);
- }
- }
- return -ENODEV;
-}
-
-#ifndef MODULE
-struct net_device * __init lance_probe(int unit)
-{
- struct net_device *dev = alloc_etherdev(0);
- int err;
-
- if (!dev)
- return ERR_PTR(-ENODEV);
-
- sprintf(dev->name, "eth%d", unit);
- netdev_boot_setup_check(dev);
-
- err = do_lance_probe(dev);
- if (err)
- goto out;
- return dev;
-out:
- free_netdev(dev);
- return ERR_PTR(err);
-}
-#endif
-
-static const struct net_device_ops lance_netdev_ops = {
- .ndo_open = lance_open,
- .ndo_start_xmit = lance_start_xmit,
- .ndo_stop = lance_close,
- .ndo_get_stats = lance_get_stats,
- .ndo_set_rx_mode = set_multicast_list,
- .ndo_tx_timeout = lance_tx_timeout,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int __init lance_probe1(struct net_device *dev, int ioaddr, int irq, int options)
-{
- struct lance_private *lp;
- unsigned long dma_channels; /* Mark spuriously-busy DMA channels */
- int i, reset_val, lance_version;
- const char *chipname;
- /* Flags for specific chips or boards. */
- unsigned char hpJ2405A = 0; /* HP ISA adaptor */
- int hp_builtin = 0; /* HP on-board ethernet. */
- static int did_version; /* Already printed version info. */
- unsigned long flags;
- int err = -ENOMEM;
- void __iomem *bios;
- u8 addr[ETH_ALEN];
-
- /* First we look for special cases.
- Check for HP's on-board ethernet by looking for 'HP' in the BIOS.
- There are two HP versions, check the BIOS for the configuration port.
- This method provided by L. Julliard, Laurent_Julliard@grenoble.hp.com.
- */
- bios = ioremap(0xf00f0, 0x14);
- if (!bios)
- return -ENOMEM;
- if (readw(bios + 0x12) == 0x5048) {
- static const short ioaddr_table[] = { 0x300, 0x320, 0x340, 0x360};
- int hp_port = (readl(bios + 1) & 1) ? 0x499 : 0x99;
- /* We can have boards other than the built-in! Verify this is on-board. */
- if ((inb(hp_port) & 0xc0) == 0x80 &&
- ioaddr_table[inb(hp_port) & 3] == ioaddr)
- hp_builtin = hp_port;
- }
- iounmap(bios);
- /* We also recognize the HP Vectra on-board here, but check below. */
- hpJ2405A = (inb(ioaddr) == 0x08 && inb(ioaddr+1) == 0x00 &&
- inb(ioaddr+2) == 0x09);
-
- /* Reset the LANCE. */
- reset_val = inw(ioaddr+LANCE_RESET); /* Reset the LANCE */
-
- /* The Un-Reset needed is only needed for the real NE2100, and will
- confuse the HP board. */
- if (!hpJ2405A)
- outw(reset_val, ioaddr+LANCE_RESET);
-
- outw(0x0000, ioaddr+LANCE_ADDR); /* Switch to window 0 */
- if (inw(ioaddr+LANCE_DATA) != 0x0004)
- return -ENODEV;
-
- /* Get the version of the chip. */
- outw(88, ioaddr+LANCE_ADDR);
- if (inw(ioaddr+LANCE_ADDR) != 88) {
- lance_version = 0;
- } else { /* Good, it's a newer chip. */
- int chip_version = inw(ioaddr+LANCE_DATA);
- outw(89, ioaddr+LANCE_ADDR);
- chip_version |= inw(ioaddr+LANCE_DATA) << 16;
- if (lance_debug > 2)
- printk(" LANCE chip version is %#x.\n", chip_version);
- if ((chip_version & 0xfff) != 0x003)
- return -ENODEV;
- chip_version = (chip_version >> 12) & 0xffff;
- for (lance_version = 1; chip_table[lance_version].id_number; lance_version++) {
- if (chip_table[lance_version].id_number == chip_version)
- break;
- }
- }
-
- /* We can't allocate private data from alloc_etherdev() because it must
- a ISA DMA-able region. */
- chipname = chip_table[lance_version].name;
- printk("%s: %s at %#3x, ", dev->name, chipname, ioaddr);
-
- /* There is a 16 byte station address PROM at the base address.
- The first six bytes are the station address. */
- for (i = 0; i < 6; i++)
- addr[i] = inb(ioaddr + i);
- eth_hw_addr_set(dev, addr);
- printk("%pM", dev->dev_addr);
-
- dev->base_addr = ioaddr;
- /* Make certain the data structures used by the LANCE are aligned and DMAble. */
-
- lp = kzalloc_obj(*lp, GFP_DMA | GFP_KERNEL);
- if (!lp)
- return -ENOMEM;
- if (lance_debug > 6) printk(" (#0x%05lx)", (unsigned long)lp);
- dev->ml_priv = lp;
- lp->name = chipname;
- lp->rx_buffs = (unsigned long)kmalloc_array(RX_RING_SIZE, PKT_BUF_SZ,
- GFP_DMA | GFP_KERNEL);
- if (!lp->rx_buffs)
- goto out_lp;
- if (lance_need_isa_bounce_buffers) {
- lp->tx_bounce_buffs = kmalloc_array(TX_RING_SIZE, PKT_BUF_SZ,
- GFP_DMA | GFP_KERNEL);
- if (!lp->tx_bounce_buffs)
- goto out_rx;
- } else
- lp->tx_bounce_buffs = NULL;
-
- lp->chip_version = lance_version;
- spin_lock_init(&lp->devlock);
-
- lp->init_block.mode = 0x0003; /* Disable Rx and Tx. */
- for (i = 0; i < 6; i++)
- lp->init_block.phys_addr[i] = dev->dev_addr[i];
- lp->init_block.filter[0] = 0x00000000;
- lp->init_block.filter[1] = 0x00000000;
- lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
- lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
-
- outw(0x0001, ioaddr+LANCE_ADDR);
- inw(ioaddr+LANCE_ADDR);
- outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
- outw(0x0002, ioaddr+LANCE_ADDR);
- inw(ioaddr+LANCE_ADDR);
- outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
- outw(0x0000, ioaddr+LANCE_ADDR);
- inw(ioaddr+LANCE_ADDR);
-
- if (irq) { /* Set iff PCI card. */
- dev->dma = 4; /* Native bus-master, no DMA channel needed. */
- dev->irq = irq;
- } else if (hp_builtin) {
- static const char dma_tbl[4] = {3, 5, 6, 0};
- static const char irq_tbl[4] = {3, 4, 5, 9};
- unsigned char port_val = inb(hp_builtin);
- dev->dma = dma_tbl[(port_val >> 4) & 3];
- dev->irq = irq_tbl[(port_val >> 2) & 3];
- printk(" HP Vectra IRQ %d DMA %d.\n", dev->irq, dev->dma);
- } else if (hpJ2405A) {
- static const char dma_tbl[4] = {3, 5, 6, 7};
- static const char irq_tbl[8] = {3, 4, 5, 9, 10, 11, 12, 15};
- short reset_val = inw(ioaddr+LANCE_RESET);
- dev->dma = dma_tbl[(reset_val >> 2) & 3];
- dev->irq = irq_tbl[(reset_val >> 4) & 7];
- printk(" HP J2405A IRQ %d DMA %d.\n", dev->irq, dev->dma);
- } else if (lance_version == PCNET_ISAP) { /* The plug-n-play version. */
- short bus_info;
- outw(8, ioaddr+LANCE_ADDR);
- bus_info = inw(ioaddr+LANCE_BUS_IF);
- dev->dma = bus_info & 0x07;
- dev->irq = (bus_info >> 4) & 0x0F;
- } else {
- /* The DMA channel may be passed in PARAM1. */
- if (dev->mem_start & 0x07)
- dev->dma = dev->mem_start & 0x07;
- }
-
- if (dev->dma == 0) {
- /* Read the DMA channel status register, so that we can avoid
- stuck DMA channels in the DMA detection below. */
- dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) |
- (inb(DMA2_STAT_REG) & 0xf0);
- }
- err = -ENODEV;
- if (dev->irq >= 2)
- printk(" assigned IRQ %d", dev->irq);
- else if (lance_version != 0) { /* 7990 boards need DMA detection first. */
- unsigned long irq_mask;
-
- /* To auto-IRQ we enable the initialization-done and DMA error
- interrupts. For ISA boards we get a DMA error, but VLB and PCI
- boards will work. */
- irq_mask = probe_irq_on();
-
- /* Trigger an initialization just for the interrupt. */
- outw(0x0041, ioaddr+LANCE_DATA);
-
- mdelay(20);
- dev->irq = probe_irq_off(irq_mask);
- if (dev->irq)
- printk(", probed IRQ %d", dev->irq);
- else {
- printk(", failed to detect IRQ line.\n");
- goto out_tx;
- }
-
- /* Check for the initialization done bit, 0x0100, which means
- that we don't need a DMA channel. */
- if (inw(ioaddr+LANCE_DATA) & 0x0100)
- dev->dma = 4;
- }
-
- if (dev->dma == 4) {
- printk(", no DMA needed.\n");
- } else if (dev->dma) {
- if (request_dma(dev->dma, chipname)) {
- printk("DMA %d allocation failed.\n", dev->dma);
- goto out_tx;
- } else
- printk(", assigned DMA %d.\n", dev->dma);
- } else { /* OK, we have to auto-DMA. */
- for (i = 0; i < 4; i++) {
- static const char dmas[] = { 5, 6, 7, 3 };
- int dma = dmas[i];
- int boguscnt;
-
- /* Don't enable a permanently busy DMA channel, or the machine
- will hang. */
- if (test_bit(dma, &dma_channels))
- continue;
- outw(0x7f04, ioaddr+LANCE_DATA); /* Clear the memory error bits. */
- if (request_dma(dma, chipname))
- continue;
-
- flags=claim_dma_lock();
- set_dma_mode(dma, DMA_MODE_CASCADE);
- enable_dma(dma);
- release_dma_lock(flags);
-
- /* Trigger an initialization. */
- outw(0x0001, ioaddr+LANCE_DATA);
- for (boguscnt = 100; boguscnt > 0; --boguscnt)
- if (inw(ioaddr+LANCE_DATA) & 0x0900)
- break;
- if (inw(ioaddr+LANCE_DATA) & 0x0100) {
- dev->dma = dma;
- printk(", DMA %d.\n", dev->dma);
- break;
- } else {
- flags=claim_dma_lock();
- disable_dma(dma);
- release_dma_lock(flags);
- free_dma(dma);
- }
- }
- if (i == 4) { /* Failure: bail. */
- printk("DMA detection failed.\n");
- goto out_tx;
- }
- }
-
- if (lance_version == 0 && dev->irq == 0) {
- /* We may auto-IRQ now that we have a DMA channel. */
- /* Trigger an initialization just for the interrupt. */
- unsigned long irq_mask;
-
- irq_mask = probe_irq_on();
- outw(0x0041, ioaddr+LANCE_DATA);
-
- mdelay(40);
- dev->irq = probe_irq_off(irq_mask);
- if (dev->irq == 0) {
- printk(" Failed to detect the 7990 IRQ line.\n");
- goto out_dma;
- }
- printk(" Auto-IRQ detected IRQ%d.\n", dev->irq);
- }
-
- if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
- /* Turn on auto-select of media (10baseT or BNC) so that the user
- can watch the LEDs even if the board isn't opened. */
- outw(0x0002, ioaddr+LANCE_ADDR);
- /* Don't touch 10base2 power bit. */
- outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
- }
-
- if (lance_debug > 0 && did_version++ == 0)
- printk(version);
-
- /* The LANCE-specific entries in the device structure. */
- dev->netdev_ops = &lance_netdev_ops;
- dev->watchdog_timeo = TX_TIMEOUT;
-
- err = register_netdev(dev);
- if (err)
- goto out_dma;
- return 0;
-out_dma:
- if (dev->dma != 4)
- free_dma(dev->dma);
-out_tx:
- kfree(lp->tx_bounce_buffs);
-out_rx:
- kfree((void*)lp->rx_buffs);
-out_lp:
- kfree(lp);
- return err;
-}
-
-
-static int
-lance_open(struct net_device *dev)
-{
- struct lance_private *lp = dev->ml_priv;
- int ioaddr = dev->base_addr;
- int i;
-
- if (dev->irq == 0 ||
- request_irq(dev->irq, lance_interrupt, 0, dev->name, dev)) {
- return -EAGAIN;
- }
-
- /* We used to allocate DMA here, but that was silly.
- DMA lines can't be shared! We now permanently allocate them. */
-
- /* Reset the LANCE */
- inw(ioaddr+LANCE_RESET);
-
- /* The DMA controller is used as a no-operation slave, "cascade mode". */
- if (dev->dma != 4) {
- unsigned long flags=claim_dma_lock();
- enable_dma(dev->dma);
- set_dma_mode(dev->dma, DMA_MODE_CASCADE);
- release_dma_lock(flags);
- }
-
- /* Un-Reset the LANCE, needed only for the NE2100. */
- if (chip_table[lp->chip_version].flags & LANCE_MUST_UNRESET)
- outw(0, ioaddr+LANCE_RESET);
-
- if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) {
- /* This is 79C960-specific: Turn on auto-select of media (AUI, BNC). */
- outw(0x0002, ioaddr+LANCE_ADDR);
- /* Only touch autoselect bit. */
- outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF);
- }
-
- if (lance_debug > 1)
- printk("%s: lance_open() irq %d dma %d tx/rx rings %#x/%#x init %#x.\n",
- dev->name, dev->irq, dev->dma,
- (u32) isa_virt_to_bus(lp->tx_ring),
- (u32) isa_virt_to_bus(lp->rx_ring),
- (u32) isa_virt_to_bus(&lp->init_block));
-
- lance_init_ring(dev, GFP_KERNEL);
- /* Re-initialize the LANCE, and start it when done. */
- outw(0x0001, ioaddr+LANCE_ADDR);
- outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA);
- outw(0x0002, ioaddr+LANCE_ADDR);
- outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA);
-
- outw(0x0004, ioaddr+LANCE_ADDR);
- outw(0x0915, ioaddr+LANCE_DATA);
-
- outw(0x0000, ioaddr+LANCE_ADDR);
- outw(0x0001, ioaddr+LANCE_DATA);
-
- netif_start_queue (dev);
-
- i = 0;
- while (i++ < 100)
- if (inw(ioaddr+LANCE_DATA) & 0x0100)
- break;
- /*
- * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
- * reports that doing so triggers a bug in the '974.
- */
- outw(0x0042, ioaddr+LANCE_DATA);
-
- if (lance_debug > 2)
- printk("%s: LANCE open after %d ticks, init block %#x csr0 %4.4x.\n",
- dev->name, i, (u32) isa_virt_to_bus(&lp->init_block), inw(ioaddr+LANCE_DATA));
-
- return 0; /* Always succeed */
-}
-
-/* The LANCE has been halted for one reason or another (busmaster memory
- arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
- etc.). Modern LANCE variants always reload their ring-buffer
- configuration when restarted, so we must reinitialize our ring
- context before restarting. As part of this reinitialization,
- find all packets still on the Tx ring and pretend that they had been
- sent (in effect, drop the packets on the floor) - the higher-level
- protocols will time out and retransmit. It'd be better to shuffle
- these skbs to a temp list and then actually re-Tx them after
- restarting the chip, but I'm too lazy to do so right now. dplatt@3do.com
-*/
-
-static void
-lance_purge_ring(struct net_device *dev)
-{
- struct lance_private *lp = dev->ml_priv;
- int i;
-
- /* Free all the skbuffs in the Rx and Tx queues. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb = lp->rx_skbuff[i];
- lp->rx_skbuff[i] = NULL;
- lp->rx_ring[i].base = 0; /* Not owned by LANCE chip. */
- if (skb)
- dev_kfree_skb_any(skb);
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- if (lp->tx_skbuff[i]) {
- dev_kfree_skb_any(lp->tx_skbuff[i]);
- lp->tx_skbuff[i] = NULL;
- }
- }
-}
-
-
-/* Initialize the LANCE Rx and Tx rings. */
-static void
-lance_init_ring(struct net_device *dev, gfp_t gfp)
-{
- struct lance_private *lp = dev->ml_priv;
- int i;
-
- lp->cur_rx = lp->cur_tx = 0;
- lp->dirty_rx = lp->dirty_tx = 0;
-
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb;
- void *rx_buff;
-
- skb = alloc_skb(PKT_BUF_SZ, GFP_DMA | gfp);
- lp->rx_skbuff[i] = skb;
- if (skb)
- rx_buff = skb->data;
- else
- rx_buff = kmalloc(PKT_BUF_SZ, GFP_DMA | gfp);
- if (!rx_buff)
- lp->rx_ring[i].base = 0;
- else
- lp->rx_ring[i].base = (u32)isa_virt_to_bus(rx_buff) | 0x80000000;
- lp->rx_ring[i].buf_length = -PKT_BUF_SZ;
- }
- /* The Tx buffer address is filled in as needed, but we do need to clear
- the upper ownership bit. */
- for (i = 0; i < TX_RING_SIZE; i++) {
- lp->tx_skbuff[i] = NULL;
- lp->tx_ring[i].base = 0;
- }
-
- lp->init_block.mode = 0x0000;
- for (i = 0; i < 6; i++)
- lp->init_block.phys_addr[i] = dev->dev_addr[i];
- lp->init_block.filter[0] = 0x00000000;
- lp->init_block.filter[1] = 0x00000000;
- lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS;
- lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS;
-}
-
-static void
-lance_restart(struct net_device *dev, unsigned int csr0_bits, int must_reinit)
-{
- struct lance_private *lp = dev->ml_priv;
-
- if (must_reinit ||
- (chip_table[lp->chip_version].flags & LANCE_MUST_REINIT_RING)) {
- lance_purge_ring(dev);
- lance_init_ring(dev, GFP_ATOMIC);
- }
- outw(0x0000, dev->base_addr + LANCE_ADDR);
- outw(csr0_bits, dev->base_addr + LANCE_DATA);
-}
-
-
-static void lance_tx_timeout (struct net_device *dev, unsigned int txqueue)
-{
- struct lance_private *lp = (struct lance_private *) dev->ml_priv;
- int ioaddr = dev->base_addr;
-
- outw (0, ioaddr + LANCE_ADDR);
- printk ("%s: transmit timed out, status %4.4x, resetting.\n",
- dev->name, inw (ioaddr + LANCE_DATA));
- outw (0x0004, ioaddr + LANCE_DATA);
- dev->stats.tx_errors++;
-#ifndef final_version
- if (lance_debug > 3) {
- int i;
- printk (" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
- lp->dirty_tx, lp->cur_tx, netif_queue_stopped(dev) ? " (full)" : "",
- lp->cur_rx);
- for (i = 0; i < RX_RING_SIZE; i++)
- printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
- lp->rx_ring[i].base, -lp->rx_ring[i].buf_length,
- lp->rx_ring[i].msg_length);
- for (i = 0; i < TX_RING_SIZE; i++)
- printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
- lp->tx_ring[i].base, -lp->tx_ring[i].length,
- lp->tx_ring[i].misc);
- printk ("\n");
- }
-#endif
- lance_restart (dev, 0x0043, 1);
-
- netif_trans_update(dev); /* prevent tx timeout */
- netif_wake_queue (dev);
-}
-
-
-static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct lance_private *lp = dev->ml_priv;
- int ioaddr = dev->base_addr;
- int entry;
- unsigned long flags;
-
- spin_lock_irqsave(&lp->devlock, flags);
-
- if (lance_debug > 3) {
- outw(0x0000, ioaddr+LANCE_ADDR);
- printk("%s: lance_start_xmit() called, csr0 %4.4x.\n", dev->name,
- inw(ioaddr+LANCE_DATA));
- outw(0x0000, ioaddr+LANCE_DATA);
- }
-
- /* Fill in a Tx ring entry */
-
- /* Mask to ring buffer boundary. */
- entry = lp->cur_tx & TX_RING_MOD_MASK;
-
- /* Caution: the write order is important here, set the base address
- with the "ownership" bits last. */
-
- /* The old LANCE chips doesn't automatically pad buffers to min. size. */
- if (chip_table[lp->chip_version].flags & LANCE_MUST_PAD) {
- if (skb->len < ETH_ZLEN) {
- if (skb_padto(skb, ETH_ZLEN))
- goto out;
- lp->tx_ring[entry].length = -ETH_ZLEN;
- }
- else
- lp->tx_ring[entry].length = -skb->len;
- } else
- lp->tx_ring[entry].length = -skb->len;
-
- lp->tx_ring[entry].misc = 0x0000;
-
- dev->stats.tx_bytes += skb->len;
-
- /* If any part of this buffer is >16M we must copy it to a low-memory
- buffer. */
- if ((u32)isa_virt_to_bus(skb->data) + skb->len > 0x01000000) {
- if (lance_debug > 5)
- printk("%s: bouncing a high-memory packet (%#x).\n",
- dev->name, (u32)isa_virt_to_bus(skb->data));
- skb_copy_from_linear_data(skb, &lp->tx_bounce_buffs[entry], skb->len);
- lp->tx_ring[entry].base =
- ((u32)isa_virt_to_bus((lp->tx_bounce_buffs + entry)) & 0xffffff) | 0x83000000;
- dev_consume_skb_irq(skb);
- } else {
- lp->tx_skbuff[entry] = skb;
- lp->tx_ring[entry].base = ((u32)isa_virt_to_bus(skb->data) & 0xffffff) | 0x83000000;
- }
- lp->cur_tx++;
-
- /* Trigger an immediate send poll. */
- outw(0x0000, ioaddr+LANCE_ADDR);
- outw(0x0048, ioaddr+LANCE_DATA);
-
- if ((lp->cur_tx - lp->dirty_tx) >= TX_RING_SIZE)
- netif_stop_queue(dev);
-
-out:
- spin_unlock_irqrestore(&lp->devlock, flags);
- return NETDEV_TX_OK;
-}
-
-/* The LANCE interrupt handler. */
-static irqreturn_t lance_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct lance_private *lp;
- int csr0, ioaddr, boguscnt=10;
- int must_restart;
-
- ioaddr = dev->base_addr;
- lp = dev->ml_priv;
-
- spin_lock (&lp->devlock);
-
- outw(0x00, dev->base_addr + LANCE_ADDR);
- while ((csr0 = inw(dev->base_addr + LANCE_DATA)) & 0x8600 &&
- --boguscnt >= 0) {
- /* Acknowledge all of the current interrupt sources ASAP. */
- outw(csr0 & ~0x004f, dev->base_addr + LANCE_DATA);
-
- must_restart = 0;
-
- if (lance_debug > 5)
- printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n",
- dev->name, csr0, inw(dev->base_addr + LANCE_DATA));
-
- if (csr0 & 0x0400) /* Rx interrupt */
- lance_rx(dev);
-
- if (csr0 & 0x0200) { /* Tx-done interrupt */
- int dirty_tx = lp->dirty_tx;
-
- while (dirty_tx < lp->cur_tx) {
- int entry = dirty_tx & TX_RING_MOD_MASK;
- int status = lp->tx_ring[entry].base;
-
- if (status < 0)
- break; /* It still hasn't been Txed */
-
- lp->tx_ring[entry].base = 0;
-
- if (status & 0x40000000) {
- /* There was an major error, log it. */
- int err_status = lp->tx_ring[entry].misc;
- dev->stats.tx_errors++;
- if (err_status & 0x0400)
- dev->stats.tx_aborted_errors++;
- if (err_status & 0x0800)
- dev->stats.tx_carrier_errors++;
- if (err_status & 0x1000)
- dev->stats.tx_window_errors++;
- if (err_status & 0x4000) {
- /* Ackk! On FIFO errors the Tx unit is turned off! */
- dev->stats.tx_fifo_errors++;
- /* Remove this verbosity later! */
- printk("%s: Tx FIFO error! Status %4.4x.\n",
- dev->name, csr0);
- /* Restart the chip. */
- must_restart = 1;
- }
- } else {
- if (status & 0x18000000)
- dev->stats.collisions++;
- dev->stats.tx_packets++;
- }
-
- /* We must free the original skb if it's not a data-only copy
- in the bounce buffer. */
- if (lp->tx_skbuff[entry]) {
- dev_consume_skb_irq(lp->tx_skbuff[entry]);
- lp->tx_skbuff[entry] = NULL;
- }
- dirty_tx++;
- }
-
-#ifndef final_version
- if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
- printk("out-of-sync dirty pointer, %d vs. %d, full=%s.\n",
- dirty_tx, lp->cur_tx,
- netif_queue_stopped(dev) ? "yes" : "no");
- dirty_tx += TX_RING_SIZE;
- }
-#endif
-
- /* if the ring is no longer full, accept more packets */
- if (netif_queue_stopped(dev) &&
- dirty_tx > lp->cur_tx - TX_RING_SIZE + 2)
- netif_wake_queue (dev);
-
- lp->dirty_tx = dirty_tx;
- }
-
- /* Log misc errors. */
- if (csr0 & 0x4000)
- dev->stats.tx_errors++; /* Tx babble. */
- if (csr0 & 0x1000)
- dev->stats.rx_errors++; /* Missed a Rx frame. */
- if (csr0 & 0x0800) {
- printk("%s: Bus master arbitration failure, status %4.4x.\n",
- dev->name, csr0);
- /* Restart the chip. */
- must_restart = 1;
- }
-
- if (must_restart) {
- /* stop the chip to clear the error condition, then restart */
- outw(0x0000, dev->base_addr + LANCE_ADDR);
- outw(0x0004, dev->base_addr + LANCE_DATA);
- lance_restart(dev, 0x0002, 0);
- }
- }
-
- /* Clear any other interrupt, and set interrupt enable. */
- outw(0x0000, dev->base_addr + LANCE_ADDR);
- outw(0x7940, dev->base_addr + LANCE_DATA);
-
- if (lance_debug > 4)
- printk("%s: exiting interrupt, csr%d=%#4.4x.\n",
- dev->name, inw(ioaddr + LANCE_ADDR),
- inw(dev->base_addr + LANCE_DATA));
-
- spin_unlock (&lp->devlock);
- return IRQ_HANDLED;
-}
-
-static int
-lance_rx(struct net_device *dev)
-{
- struct lance_private *lp = dev->ml_priv;
- int entry = lp->cur_rx & RX_RING_MOD_MASK;
- int i;
-
- /* If we own the next entry, it's a new packet. Send it up. */
- while (lp->rx_ring[entry].base >= 0) {
- int status = lp->rx_ring[entry].base >> 24;
-
- if (status != 0x03) { /* There was an error. */
- /* There is a tricky error noted by John Murphy,
- <murf@perftech.com> to Russ Nelson: Even with full-sized
- buffers it's possible for a jabber packet to use two
- buffers, with only the last correctly noting the error. */
- if (status & 0x01) /* Only count a general error at the */
- dev->stats.rx_errors++; /* end of a packet.*/
- if (status & 0x20)
- dev->stats.rx_frame_errors++;
- if (status & 0x10)
- dev->stats.rx_over_errors++;
- if (status & 0x08)
- dev->stats.rx_crc_errors++;
- if (status & 0x04)
- dev->stats.rx_fifo_errors++;
- lp->rx_ring[entry].base &= 0x03ffffff;
- }
- else
- {
- /* Malloc up new buffer, compatible with net3. */
- short pkt_len = (lp->rx_ring[entry].msg_length & 0xfff)-4;
- struct sk_buff *skb;
-
- if(pkt_len<60)
- {
- printk("%s: Runt packet!\n",dev->name);
- dev->stats.rx_errors++;
- }
- else
- {
- skb = dev_alloc_skb(pkt_len+2);
- if (!skb)
- {
- printk("%s: Memory squeeze, deferring packet.\n", dev->name);
- for (i=0; i < RX_RING_SIZE; i++)
- if (lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].base < 0)
- break;
-
- if (i > RX_RING_SIZE -2)
- {
- dev->stats.rx_dropped++;
- lp->rx_ring[entry].base |= 0x80000000;
- lp->cur_rx++;
- }
- break;
- }
- skb_reserve(skb,2); /* 16 byte align */
- skb_put(skb,pkt_len); /* Make room */
- skb_copy_to_linear_data(skb,
- (unsigned char *)isa_bus_to_virt((lp->rx_ring[entry].base & 0x00ffffff)),
- pkt_len);
- skb->protocol=eth_type_trans(skb,dev);
- netif_rx(skb);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pkt_len;
- }
- }
- /* The docs say that the buffer length isn't touched, but Andrew Boyd
- of QNX reports that some revs of the 79C965 clear it. */
- lp->rx_ring[entry].buf_length = -PKT_BUF_SZ;
- lp->rx_ring[entry].base |= 0x80000000;
- entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
- }
-
- /* We should check that at least two ring entries are free. If not,
- we should free one and mark stats->rx_dropped++. */
-
- return 0;
-}
-
-static int
-lance_close(struct net_device *dev)
-{
- int ioaddr = dev->base_addr;
- struct lance_private *lp = dev->ml_priv;
-
- netif_stop_queue (dev);
-
- if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
- outw(112, ioaddr+LANCE_ADDR);
- dev->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
- }
- outw(0, ioaddr+LANCE_ADDR);
-
- if (lance_debug > 1)
- printk("%s: Shutting down ethercard, status was %2.2x.\n",
- dev->name, inw(ioaddr+LANCE_DATA));
-
- /* We stop the LANCE here -- it occasionally polls
- memory if we don't. */
- outw(0x0004, ioaddr+LANCE_DATA);
-
- if (dev->dma != 4)
- {
- unsigned long flags=claim_dma_lock();
- disable_dma(dev->dma);
- release_dma_lock(flags);
- }
- free_irq(dev->irq, dev);
-
- lance_purge_ring(dev);
-
- return 0;
-}
-
-static struct net_device_stats *lance_get_stats(struct net_device *dev)
-{
- struct lance_private *lp = dev->ml_priv;
-
- if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) {
- short ioaddr = dev->base_addr;
- short saved_addr;
- unsigned long flags;
-
- spin_lock_irqsave(&lp->devlock, flags);
- saved_addr = inw(ioaddr+LANCE_ADDR);
- outw(112, ioaddr+LANCE_ADDR);
- dev->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA);
- outw(saved_addr, ioaddr+LANCE_ADDR);
- spin_unlock_irqrestore(&lp->devlock, flags);
- }
-
- return &dev->stats;
-}
-
-/* Set or clear the multicast filter for this adaptor.
- */
-
-static void set_multicast_list(struct net_device *dev)
-{
- short ioaddr = dev->base_addr;
-
- outw(0, ioaddr+LANCE_ADDR);
- outw(0x0004, ioaddr+LANCE_DATA); /* Temporarily stop the lance. */
-
- if (dev->flags&IFF_PROMISC) {
- outw(15, ioaddr+LANCE_ADDR);
- outw(0x8000, ioaddr+LANCE_DATA); /* Set promiscuous mode */
- } else {
- short multicast_table[4];
- int i;
- int num_addrs=netdev_mc_count(dev);
- if(dev->flags&IFF_ALLMULTI)
- num_addrs=1;
- /* FIXIT: We don't use the multicast table, but rely on upper-layer filtering. */
- memset(multicast_table, (num_addrs == 0) ? 0 : -1, sizeof(multicast_table));
- for (i = 0; i < 4; i++) {
- outw(8 + i, ioaddr+LANCE_ADDR);
- outw(multicast_table[i], ioaddr+LANCE_DATA);
- }
- outw(15, ioaddr+LANCE_ADDR);
- outw(0x0000, ioaddr+LANCE_DATA); /* Unset promiscuous mode */
- }
-
- lance_restart(dev, 0x0142, 0); /* Resume normal operation */
-
-}
-

--
2.53.0