/* 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 <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)"); int __init 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; } 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); } void __exit 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); <------><------>} <------>} } #endif /* MODULE */ 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; <------>/* 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++) <------><------>dev->dev_addr[i] = inb(ioaddr + i); <------>printk("%pM", dev->dev_addr); <------>dev->base_addr = ioaddr; <------>/* Make certain the data structures used by the LANCE are aligned and DMAble. */ <------>lp = kzalloc(sizeof(*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 == NULL) <------><------><------>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_kfree_skb(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 == NULL) <------><------><------><------>{ <------><------><------><------><------>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 */ }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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