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Diffstat (limited to 'linux/src/drivers/net/hamachi.c')
-rw-r--r-- | linux/src/drivers/net/hamachi.c | 1315 |
1 files changed, 1315 insertions, 0 deletions
diff --git a/linux/src/drivers/net/hamachi.c b/linux/src/drivers/net/hamachi.c new file mode 100644 index 0000000..fdcf43d --- /dev/null +++ b/linux/src/drivers/net/hamachi.c @@ -0,0 +1,1315 @@ +/* hamachi.c: A Packet Engines GNIC-II Gigabit Ethernet driver for Linux. */ +/* + Written 1998-2002 by Donald Becker. + + This software may be used and distributed according to the terms of + the GNU General Public License (GPL), incorporated herein by reference. + Drivers based on or derived from this code fall under the GPL and must + retain the authorship, copyright and license notice. This file is not + a complete program and may only be used when the entire operating + system is licensed under the GPL. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + This driver is for the Packet Engines GNIC-II PCI Gigabit Ethernet + adapter. + + Support and updates available at + http://www.scyld.com/network/hamachi.html +*/ + +/* These identify the driver base version and may not be removed. */ +static const char version1[] = +"hamachi.c:v1.04 11/17/2002 Written by Donald Becker <becker@scyld.com>\n"; +static const char version2[] = +" http://www.scyld.com/network/hamachi.html\n"; + +/* Automatically extracted configuration info: +probe-func: hamachi_probe +config-in: tristate 'Packet Engines "Hamachi" PCI Gigabit Ethernet support' CONFIG_HAMACHI +c-help-name: Packet Engines "Hamachi" PCI Gigabit Ethernet support +c-help-symbol: CONFIG_HAMACHI +c-help: This driver is for the Packet Engines "Hamachi" GNIC-2 Gigabit Ethernet +c-help: adapter. +c-help: Usage information and updates are available from +c-help: http://www.scyld.com/network/hamachi.html +*/ + +/* The user-configurable values. + These may be modified when a driver module is loaded.*/ + +/* Message enable level: 0..31 = no..all messages. See NETIF_MSG docs. */ +static int debug = 2; + +/* Maximum events (Rx packets, etc.) to handle at each interrupt. */ +static int max_interrupt_work = 40; + +/* Maximum number of multicast addresses to filter (vs. rx-all-multicast). + The Hamachi has a 64 element perfect filter. */ +static int multicast_filter_limit = 32; + +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1518 effectively disables this feature. */ +static int rx_copybreak = 0; + +/* A override for the hardware detection of bus width. + Set to 1 to force 32 bit PCI bus detection. Set to 4 to force 64 bit. + Add 2 to disable parity detection. +*/ +static int force32 = 0; + +/* Used to pass the media type, etc. + These exist for driver interoperability. + Only 1 Gigabit is supported by the chip. +*/ +#define MAX_UNITS 8 /* More are supported, limit only on options */ +static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; +static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; + +/* Operational parameters that are set at compile time. */ + +/* Keep the ring sizes a power of two for compile efficiency. + The compiler will convert <unsigned>'%'<2^N> into a bit mask. + Making the Tx ring too large decreases the effectiveness of channel + bonding and packet priority. + There are no ill effects from too-large receive rings. */ +#define TX_RING_SIZE 64 +#define TX_QUEUE_LEN 60 /* Limit ring entries actually used. */ +#define RX_RING_SIZE 128 + +/* Operational parameters that usually are not changed. */ +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (6*HZ) + +/* Allocation size of Rx buffers with normal sized Ethernet frames. + Do not change this value without good reason. This is not a limit, + but a way to keep a consistent allocation size among drivers. + */ +#define PKT_BUF_SZ 1536 + +#ifndef __KERNEL__ +#define __KERNEL__ +#endif +#if !defined(__OPTIMIZE__) +#warning You must compile this file with the correct options! +#warning See the last lines of the source file. +#error You must compile this driver with "-O". +#endif + +#include <linux/config.h> +#if defined(CONFIG_SMP) && ! defined(__SMP__) +#define __SMP__ +#endif +#if defined(MODULE) && defined(CONFIG_MODVERSIONS) && ! defined(MODVERSIONS) +#define MODVERSIONS +#endif + +#include <linux/version.h> +#if defined(MODVERSIONS) +#include <linux/modversions.h> +#endif +#include <linux/module.h> + +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#if LINUX_VERSION_CODE >= 0x20400 +#include <linux/slab.h> +#else +#include <linux/malloc.h> +#endif +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <asm/processor.h> /* Processor type for cache alignment. */ +#include <asm/bitops.h> +#include <asm/io.h> +#include <asm/unaligned.h> + +#ifdef INLINE_PCISCAN +#include "k_compat.h" +#else +#include "pci-scan.h" +#include "kern_compat.h" +#endif + +/* Condensed operations for readability. */ +#if ADDRLEN == 64 +#define virt_to_desc(addr) cpu_to_le64(virt_to_bus(addr)) +#else +#define virt_to_desc(addr) cpu_to_le32(virt_to_bus(addr)) +#define le32desc_to_virt(addr) bus_to_virt(le32_to_cpu(addr)) +#endif + +#if (LINUX_VERSION_CODE >= 0x20100) && defined(MODULE) +char kernel_version[] = UTS_RELEASE; +#endif + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver"); +MODULE_LICENSE("GPL"); +MODULE_PARM(debug, "i"); +MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i"); +MODULE_PARM(rx_copybreak, "i"); +MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i"); +MODULE_PARM(multicast_filter_limit, "i"); +MODULE_PARM(max_interrupt_work, "i"); +MODULE_PARM(force32, "i"); +MODULE_PARM_DESC(debug, "Driver message level (0-31)"); +MODULE_PARM_DESC(options, "Force transceiver type or fixed speed+duplex"); +MODULE_PARM_DESC(max_interrupt_work, + "Driver maximum events handled per interrupt"); +MODULE_PARM_DESC(full_duplex, + "Non-zero to force full duplex, non-negotiated link " + "(unused, deprecated)."); +MODULE_PARM_DESC(rx_copybreak, + "Breakpoint in bytes for copy-only-tiny-frames"); +MODULE_PARM_DESC(multicast_filter_limit, + "Multicast addresses before switching to Rx-all-multicast"); +MODULE_PARM_DESC(force32, "Set to 1 to force 32 bit PCI bus use."); + +/* + Theory of Operation + +I. Board Compatibility + +This device driver is designed for the Packet Engines "Hamachi" +Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit +66Mhz PCI card. + +II. Board-specific settings + +No jumpers exist on the board. The chip supports software correction of +various motherboard wiring errors, however this driver does not support +that feature. + +III. Driver operation + +IIIa. Ring buffers + +The Hamachi uses a typical descriptor based bus-master architecture. +The descriptor list is similar to that used by the Digital Tulip. +This driver uses two statically allocated fixed-size descriptor lists +formed into rings by a branch from the final descriptor to the beginning of +the list. The ring sizes are set at compile time by RX/TX_RING_SIZE. + +This driver uses a zero-copy receive and transmit scheme similar my other +network drivers. +The driver allocates full frame size skbuffs for the Rx ring buffers at +open() time and passes the skb->data field to the Hamachi as receive data +buffers. When an incoming frame is less than RX_COPYBREAK bytes long, +a fresh skbuff is allocated and the frame is copied to the new skbuff. +When the incoming frame is larger, the skbuff is passed directly up the +protocol stack and replaced by a newly allocated skbuff. + +The RX_COPYBREAK value is chosen to trade-off the memory wasted by +using a full-sized skbuff for small frames vs. the copying costs of larger +frames. Gigabit cards are typically used on generously configured machines +and the underfilled buffers have negligible impact compared to the benefit of +a single allocation size, so the default value of zero results in never +copying packets. + +IIIb/c. Transmit/Receive Structure + +The Rx and Tx descriptor structure are straight-forward, with no historical +baggage that must be explained. Unlike the awkward DBDMA structure, there +are no unused fields or option bits that had only one allowable setting. + +Two details should be noted about the descriptors: The chip supports both 32 +bit and 64 bit address structures, and the length field is overwritten on +the receive descriptors. The descriptor length is set in the control word +for each channel. The development driver uses 32 bit addresses only, however +64 bit addresses may be enabled for 64 bit architectures e.g. the Alpha. + +IIId. Synchronization + +This driver is very similar to my other network drivers. +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 'hmp->tx_full' flag. + +The interrupt handler has exclusive control over the Rx ring and records stats +from the Tx ring. After reaping the stats, it marks the Tx queue entry as +empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it +clears both the tx_full and tbusy flags. + +IV. Notes + +Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards. + +IVb. References + +Hamachi Engineering Design Specification, 5/15/97 +(Note: This version was marked "Confidential".) + +IVc. Errata + +None noted. +*/ + + +/* The table for PCI detection and activation. */ + +static void *hamachi_probe1(struct pci_dev *pdev, void *init_dev, + long ioaddr, int irq, int chip_idx, int find_cnt); +enum chip_capability_flags { CanHaveMII=1, }; + +static struct pci_id_info pci_id_tbl[] = { + {"Packet Engines GNIC-II \"Hamachi\"", { 0x09111318, 0xffffffff,}, + PCI_USES_MEM | PCI_USES_MASTER | PCI_ADDR0 | PCI_ADDR_64BITS, 0x400, 0, }, + { 0,}, +}; + +struct drv_id_info hamachi_drv_id = { + "hamachi", 0, PCI_CLASS_NETWORK_ETHERNET<<8, pci_id_tbl, + hamachi_probe1, 0, +}; + +/* Offsets to the Hamachi registers. Various sizes. */ +enum hamachi_offsets { + TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10, + RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30, + PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B, + LEDCtrl=0x06C, VirtualJumpers=0x06D, + TxChecksum=0x074, RxChecksum=0x076, + TxIntrCtrl=0x078, RxIntrCtrl=0x07C, + InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088, + EventStatus=0x08C, + MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4, + /* See enum MII_offsets below. */ + MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE, + AddrMode=0x0D0, StationAddr=0x0D2, + /* Gigabit AutoNegotiation. */ + ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8, + ANLinkPartnerAbility=0x0EA, + EECmdStatus=0x0F0, EEData=0x0F1, EEAddr=0x0F2, + FIFOcfg=0x0F8, +}; + +/* Offsets to the MII-mode registers. */ +enum MII_offsets { + MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC, + MII_Status=0xAE, +}; + +/* Bits in the interrupt status/mask registers. */ +enum intr_status_bits { + IntrRxDone=0x01, IntrRxPCIFault=0x02, IntrRxPCIErr=0x04, + IntrTxDone=0x100, IntrTxPCIFault=0x200, IntrTxPCIErr=0x400, + LinkChange=0x10000, NegotiationChange=0x20000, StatsMax=0x40000, }; + +/* The Hamachi Rx and Tx buffer descriptors. */ +struct hamachi_desc { + u32 status_n_length; +#if ADDRLEN == 64 + u32 pad; + u64 addr; +#else + u32 addr; +#endif +}; + +/* Bits in hamachi_desc.status */ +enum desc_status_bits { + DescOwn=0x80000000, DescEndPacket=0x40000000, DescEndRing=0x20000000, + DescIntr=0x10000000, +}; + +#define PRIV_ALIGN 15 /* Required alignment mask */ +struct hamachi_private { + /* Descriptor rings first for alignment. Tx requires a second descriptor + for status. */ + struct hamachi_desc rx_ring[RX_RING_SIZE]; + struct hamachi_desc tx_ring[TX_RING_SIZE]; + /* The addresses of receive-in-place skbuffs. */ + struct sk_buff* rx_skbuff[RX_RING_SIZE]; + /* The saved address of a sent-in-place packet/buffer, for skfree(). */ + struct sk_buff* tx_skbuff[TX_RING_SIZE]; + struct net_device *next_module; + void *priv_addr; /* Unaligned address for kfree */ + struct net_device_stats stats; + struct timer_list timer; /* Media monitoring timer. */ + int chip_id, drv_flags; + struct pci_dev *pci_dev; + + /* Frequently used and paired value: keep adjacent for cache effect. */ + int msg_level; + int max_interrupt_work; + long in_interrupt; + + struct hamachi_desc *rx_head_desc; + unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */ + unsigned int rx_buf_sz; /* Based on MTU+slack. */ + int rx_copybreak; + int multicast_filter_limit; + int rx_mode; + + unsigned int cur_tx, dirty_tx; + unsigned int tx_full:1; /* The Tx queue is full. */ + unsigned int full_duplex:1; /* Full-duplex operation requested. */ + unsigned int duplex_lock:1; + unsigned int medialock:1; /* Do not sense media. */ + unsigned int default_port; /* Last dev->if_port value. */ + /* MII transceiver section. */ + int mii_cnt; /* MII device addresses. */ + u16 advertising; /* NWay media advertisement */ + unsigned char phys[2]; /* MII device addresses. */ +}; + +static int read_eeprom(struct net_device *dev, int location); +static int mdio_read(long ioaddr, int phy_id, int location); +static void mdio_write(long ioaddr, int phy_id, int location, int value); +static int hamachi_open(struct net_device *dev); +static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +#ifdef HAVE_CHANGE_MTU +static int change_mtu(struct net_device *dev, int new_mtu); +#endif +static void hamachi_timer(unsigned long data); +static void hamachi_tx_timeout(struct net_device *dev); +static void hamachi_init_ring(struct net_device *dev); +static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev); +static void hamachi_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +static int hamachi_rx(struct net_device *dev); +static void hamachi_error(struct net_device *dev, int intr_status); +static int hamachi_close(struct net_device *dev); +static struct net_device_stats *hamachi_get_stats(struct net_device *dev); +static void set_rx_mode(struct net_device *dev); + + + +/* A list of our installed devices, for removing the driver module. */ +static struct net_device *root_hamachi_dev = NULL; + +#ifndef MODULE +int hamachi_probe(struct net_device *dev) +{ + if (pci_drv_register(&hamachi_drv_id, dev) < 0) + return -ENODEV; + printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2); + return 0; +} +#endif + +static void *hamachi_probe1(struct pci_dev *pdev, void *init_dev, + long ioaddr, int irq, int chip_idx, int card_idx) +{ + struct net_device *dev; + struct hamachi_private *np; + void *priv_mem; + int i, option = card_idx < MAX_UNITS ? options[card_idx] : 0; + + dev = init_etherdev(init_dev, 0); + if (!dev) + return NULL; + + printk(KERN_INFO "%s: %s type %x at 0x%lx, ", + dev->name, pci_id_tbl[chip_idx].name, (int)readl(ioaddr + ChipRev), + ioaddr); + + for (i = 0; i < 6; i++) + dev->dev_addr[i] = read_eeprom(dev, 4 + i); + /* Alternate: readb(ioaddr + StationAddr + i); */ + for (i = 0; i < 5; i++) + printk("%2.2x:", dev->dev_addr[i]); + printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq); + + i = readb(ioaddr + PCIClkMeas); + printk(KERN_INFO "%s: %d-bit %d Mhz PCI bus (%d), Virtual Jumpers " + "%2.2x, LPA %4.4x.\n", + dev->name, readw(ioaddr + MiscStatus) & 1 ? 64 : 32, + i ? 2000/(i&0x7f) : 0, i&0x7f, (int)readb(ioaddr + VirtualJumpers), + (int)readw(ioaddr + ANLinkPartnerAbility)); + + /* Hmmm, do we really need to reset the chip???. */ + writeb(1, ioaddr + ChipReset); + + /* If the bus size is misidentified, do the following. */ + if (force32) + writeb(force32, ioaddr + VirtualJumpers); + + /* Make certain elements e.g. descriptor lists are aligned. */ + priv_mem = kmalloc(sizeof(*np) + PRIV_ALIGN, GFP_KERNEL); + /* Check for the very unlikely case of no memory. */ + if (priv_mem == NULL) + return NULL; + + dev->base_addr = ioaddr; + dev->irq = irq; + + dev->priv = np = (void *)(((long)priv_mem + PRIV_ALIGN) & ~PRIV_ALIGN); + memset(np, 0, sizeof(*np)); + np->priv_addr = priv_mem; + + np->next_module = root_hamachi_dev; + root_hamachi_dev = dev; + + np->pci_dev = pdev; + np->chip_id = chip_idx; + np->drv_flags = pci_id_tbl[chip_idx].drv_flags; + np->msg_level = (1 << debug) - 1; + np->rx_copybreak = rx_copybreak; + np->max_interrupt_work = max_interrupt_work; + np->multicast_filter_limit = + multicast_filter_limit < 64 ? multicast_filter_limit : 64; + + if (dev->mem_start) + option = dev->mem_start; + + /* The lower four bits are the media type. */ + if (option > 0) { + if (option & 0x2220) + np->full_duplex = 1; + np->default_port = option & 15; + if (np->default_port & 0x3330) + np->medialock = 1; + } + if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0) + np->full_duplex = 1; + + if (np->full_duplex) { + if (np->msg_level & NETIF_MSG_PROBE) + printk(KERN_INFO "%s: Set to forced full duplex, autonegotiation" + " disabled.\n", dev->name); + np->duplex_lock = 1; + } + + /* The Hamachi-specific entries in the device structure. */ + dev->open = &hamachi_open; + dev->hard_start_xmit = &hamachi_start_xmit; + dev->stop = &hamachi_close; + dev->get_stats = &hamachi_get_stats; + dev->set_multicast_list = &set_rx_mode; + dev->do_ioctl = &mii_ioctl; +#ifdef HAVE_CHANGE_MTU + dev->change_mtu = change_mtu; +#endif + + if (np->drv_flags & CanHaveMII) { + int phy, phy_idx = 0; + for (phy = 0; phy < 32 && phy_idx < 4; phy++) { + int mii_status = mdio_read(ioaddr, phy, 1); + if (mii_status != 0xffff && mii_status != 0x0000) { + np->phys[phy_idx++] = phy; + np->advertising = mdio_read(ioaddr, phy, 4); + printk(KERN_INFO "%s: MII PHY found at address %d, status " + "0x%4.4x advertising %4.4x.\n", + dev->name, phy, mii_status, np->advertising); + } + } + np->mii_cnt = phy_idx; + } +#ifdef notyet + /* Disable PCI Parity Error (0x02) or PCI 64 Bit (0x01) for miswired + motherboards. */ + if (readb(ioaddr + VirtualJumpers) != 0x30) + writeb(0x33, ioaddr + VirtualJumpers) +#endif + /* Configure gigabit autonegotiation. */ + writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */ + writew(0x08e0, ioaddr + ANAdvertise); /* Set our advertise word. */ + writew(0x1000, ioaddr + ANCtrl); /* Enable negotiation */ + + return dev; +} + +static int read_eeprom(struct net_device *dev, int location) +{ + struct hamachi_private *np = (void *)dev->priv; + long ioaddr = dev->base_addr; + int bogus_cnt = 1000; + + writew(location, ioaddr + EEAddr); + writeb(0x02, ioaddr + EECmdStatus); + while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0) + ; + if (np->msg_level & NETIF_MSG_MISC) + printk(KERN_DEBUG " EEPROM status is %2.2x after %d ticks.\n", + (int)readb(ioaddr + EECmdStatus), 1000- bogus_cnt); + return readb(ioaddr + EEData); +} + +/* MII Managemen Data I/O accesses. + These routines assume the MDIO controller is idle, and do not exit until + the command is finished. */ + +static int mdio_read(long ioaddr, int phy_id, int location) +{ + int i; + + writew((phy_id<<8) + location, ioaddr + MII_Addr); + writew(1, ioaddr + MII_Cmd); + for (i = 10000; i >= 0; i--) + if ((readw(ioaddr + MII_Status) & 1) == 0) + break; + return readw(ioaddr + MII_Rd_Data); +} + +static void mdio_write(long ioaddr, int phy_id, int location, int value) +{ + int i; + + writew((phy_id<<8) + location, ioaddr + MII_Addr); + writew(value, ioaddr + MII_Wr_Data); + + /* Wait for the command to finish. */ + for (i = 10000; i >= 0; i--) + if ((readw(ioaddr + MII_Status) & 1) == 0) + break; + return; +} + + +static int hamachi_open(struct net_device *dev) +{ + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + long ioaddr = dev->base_addr; + int i; + + /* Do we need to reset the chip??? */ + + MOD_INC_USE_COUNT; + + if (request_irq(dev->irq, &hamachi_interrupt, SA_SHIRQ, dev->name, dev)) { + MOD_DEC_USE_COUNT; + return -EAGAIN; + } + + if (hmp->msg_level & NETIF_MSG_IFUP) + printk(KERN_DEBUG "%s: hamachi_open() irq %d.\n", + dev->name, dev->irq); + + hamachi_init_ring(dev); + +#if ADDRLEN == 64 + writel(virt_to_bus(hmp->rx_ring), ioaddr + RxPtr); + writel(virt_to_bus(hmp->rx_ring) >> 32, ioaddr + RxPtr + 4); + writel(virt_to_bus(hmp->tx_ring), ioaddr + TxPtr); + writel(virt_to_bus(hmp->tx_ring) >> 32, ioaddr + TxPtr + 4); +#else + writel(virt_to_bus(hmp->rx_ring), ioaddr + RxPtr); + writel(virt_to_bus(hmp->tx_ring), ioaddr + TxPtr); +#endif + + for (i = 0; i < 6; i++) + writeb(dev->dev_addr[i], ioaddr + StationAddr + i); + + /* Initialize other registers: with so many this eventually this will + converted to an offset/value list. */ + /* Configure the FIFO for 512K external, 16K used for Tx. */ + writew(0x0028, ioaddr + FIFOcfg); + + if (dev->if_port == 0) + dev->if_port = hmp->default_port; + hmp->in_interrupt = 0; + + /* Setting the Rx mode will start the Rx process. */ + /* We are always in full-duplex mode with gigabit! */ + hmp->full_duplex = 1; + writew(0x0001, ioaddr + RxChecksum); /* Enable Rx IP partial checksum. */ + writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */ + writew(0x215F, ioaddr + MACCnfg); + writew(0x000C, ioaddr + FrameGap0); /* 0060/4060 for non-MII 10baseT */ + writew(0x1018, ioaddr + FrameGap1); + writew(0x2780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */ + /* Enable automatic generation of flow control frames, period 0xffff. */ + writel(0x0030FFFF, ioaddr + FlowCtrl); + writew(dev->mtu+19, ioaddr + MaxFrameSize); /* hmp->rx_buf_sz ??? */ + + /* Enable legacy links. */ + writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */ + /* Initial Link LED to blinking red. */ + writeb(0x03, ioaddr + LEDCtrl); + + /* Configure interrupt mitigation. This has a great effect on + performance, so systems tuning should start here!. */ + writel(0x00080000, ioaddr + TxIntrCtrl); + writel(0x00000020, ioaddr + RxIntrCtrl); + + hmp->rx_mode = 0; /* Force Rx mode write. */ + set_rx_mode(dev); + netif_start_tx_queue(dev); + + /* Enable interrupts by setting the interrupt mask. */ + writel(0x80878787, ioaddr + InterruptEnable); + writew(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */ + + /* Configure and start the DMA channels. */ + /* Burst sizes are in the low three bits: size = 4<<(val&7) */ +#if ADDRLEN == 64 + writew(0x0055, ioaddr + RxDMACtrl); /* 128 dword bursts */ + writew(0x0055, ioaddr + TxDMACtrl); +#else + writew(0x0015, ioaddr + RxDMACtrl); + writew(0x0015, ioaddr + TxDMACtrl); +#endif + writew(1, dev->base_addr + RxCmd); + + if (hmp->msg_level & NETIF_MSG_IFUP) + printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n", + dev->name, (int)readw(ioaddr + RxStatus), + (int)readw(ioaddr + TxStatus)); + + /* Set the timer to check for link beat. */ + init_timer(&hmp->timer); + hmp->timer.expires = jiffies + 3*HZ; + hmp->timer.data = (unsigned long)dev; + hmp->timer.function = &hamachi_timer; /* timer handler */ + add_timer(&hmp->timer); + + return 0; +} + +static void hamachi_timer(unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + long ioaddr = dev->base_addr; + int next_tick = 10*HZ; + + if (hmp->msg_level & NETIF_MSG_TIMER) { + printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA " + "%4.4x.\n", dev->name, (int)readw(ioaddr + ANStatus), + (int)readw(ioaddr + ANLinkPartnerAbility)); + printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x " + "%4.4x %4.4x %4.4x.\n", dev->name, + (int)readw(ioaddr + 0x0e0), + (int)readw(ioaddr + 0x0e2), + (int)readw(ioaddr + 0x0e4), + (int)readw(ioaddr + 0x0e6), + (int)readw(ioaddr + 0x0e8), + (int)readw(ioaddr + 0x0eA)); + } + /* This has a small false-trigger window. */ + if (netif_queue_paused(dev) && + (jiffies - dev->trans_start) > TX_TIMEOUT + && hmp->cur_tx - hmp->dirty_tx > 1) { + hamachi_tx_timeout(dev); + } + /* We could do something here... nah. */ + hmp->timer.expires = jiffies + next_tick; + add_timer(&hmp->timer); +} + +static void hamachi_tx_timeout(struct net_device *dev) +{ + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + long ioaddr = dev->base_addr; + + printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x," + " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus)); + + if (hmp->msg_level & NETIF_MSG_TX_ERR) { + int i; + printk(KERN_DEBUG " Rx ring %p: ", hmp->rx_ring); + for (i = 0; i < RX_RING_SIZE; i++) + printk(" %8.8x", (unsigned int)hmp->rx_ring[i].status_n_length); + printk("\n"KERN_DEBUG" Tx ring %p: ", hmp->tx_ring); + for (i = 0; i < TX_RING_SIZE; i++) + printk(" %4.4x", hmp->tx_ring[i].status_n_length); + printk("\n"); + } + + /* Perhaps we should reinitialize the hardware here. */ + dev->if_port = 0; + /* Stop and restart the chip's Tx processes . */ + + /* Trigger an immediate transmit demand. */ + writew(2, dev->base_addr + TxCmd); + writew(1, dev->base_addr + TxCmd); + writew(1, dev->base_addr + RxCmd); + + dev->trans_start = jiffies; + hmp->stats.tx_errors++; + return; +} + + +/* Initialize the Rx and Tx rings, along with various 'dev' bits. */ +static void hamachi_init_ring(struct net_device *dev) +{ + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + int i; + + hmp->tx_full = 0; + hmp->cur_rx = hmp->cur_tx = 0; + hmp->dirty_rx = hmp->dirty_tx = 0; + + /* Size of each temporary Rx buffer. Add 8 if you do Rx checksumming! */ + hmp->rx_buf_sz = dev->mtu + 18 + 8; + /* Match other driver's allocation size when possible. */ + if (hmp->rx_buf_sz < PKT_BUF_SZ) + hmp->rx_buf_sz = PKT_BUF_SZ; + hmp->rx_head_desc = &hmp->rx_ring[0]; + + /* Initialize all Rx descriptors. */ + for (i = 0; i < RX_RING_SIZE; i++) { + hmp->rx_ring[i].status_n_length = 0; + hmp->rx_skbuff[i] = 0; + } + /* Fill in the Rx buffers. Handle allocation failure gracefully. */ + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz); + hmp->rx_skbuff[i] = skb; + if (skb == NULL) + break; + skb->dev = dev; /* Mark as being used by this device. */ + skb_reserve(skb, 2); /* 16 byte align the IP header. */ + hmp->rx_ring[i].addr = virt_to_desc(skb->tail); + hmp->rx_ring[i].status_n_length = + cpu_to_le32(DescOwn | DescEndPacket | DescIntr | hmp->rx_buf_sz); + } + hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE); + /* Mark the last entry as wrapping the ring. */ + hmp->rx_ring[i-1].status_n_length |= cpu_to_le32(DescEndRing); + + for (i = 0; i < TX_RING_SIZE; i++) { + hmp->tx_skbuff[i] = 0; + hmp->tx_ring[i].status_n_length = 0; + } + return; +} + +static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + unsigned entry; + + /* Block a timer-based transmit from overlapping. This could better be + done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */ + if (netif_pause_tx_queue(dev) != 0) { + /* This watchdog code is redundant with the media monitor timer. */ + if (jiffies - dev->trans_start > TX_TIMEOUT) + hamachi_tx_timeout(dev); + return 1; + } + + /* Note: Ordering is important here, set the field with the + "ownership" bit last, and only then increment cur_tx. */ + + /* Calculate the next Tx descriptor entry. */ + entry = hmp->cur_tx % TX_RING_SIZE; + + hmp->tx_skbuff[entry] = skb; + + hmp->tx_ring[entry].addr = virt_to_desc(skb->data); + if (entry >= TX_RING_SIZE-1) /* Wrap ring */ + hmp->tx_ring[entry].status_n_length = + cpu_to_le32(DescOwn|DescEndPacket|DescEndRing|DescIntr | skb->len); + else + hmp->tx_ring[entry].status_n_length = + cpu_to_le32(DescOwn|DescEndPacket | skb->len); + hmp->cur_tx++; + + /* Architecture-specific: explicitly flush cache lines here. */ + + /* Wake the potentially-idle transmit channel. */ + writew(1, dev->base_addr + TxCmd); + + if (hmp->cur_tx - hmp->dirty_tx >= TX_QUEUE_LEN - 1) { + hmp->tx_full = 1; + if (hmp->cur_tx - hmp->dirty_tx < TX_QUEUE_LEN - 1) { + netif_unpause_tx_queue(dev); + hmp->tx_full = 0; + } else + netif_stop_tx_queue(dev); + } else + netif_unpause_tx_queue(dev); /* Typical path */ + dev->trans_start = jiffies; + + if (hmp->msg_level & NETIF_MSG_TX_QUEUED) { + printk(KERN_DEBUG "%s: Hamachi transmit frame #%d length %d queued " + "in slot %d.\n", dev->name, hmp->cur_tx, (int)skb->len, entry); + } + return 0; +} + +/* The interrupt handler does all of the Rx thread work and cleans up + after the Tx thread. */ +static void hamachi_interrupt(int irq, void *dev_instance, struct pt_regs *rgs) +{ + struct net_device *dev = (struct net_device *)dev_instance; + struct hamachi_private *hmp; + long ioaddr; + int boguscnt = max_interrupt_work; + +#ifndef final_version /* Can never occur. */ + if (dev == NULL) { + printk (KERN_ERR "hamachi_interrupt(): irq %d for unknown device.\n", irq); + return; + } +#endif + + ioaddr = dev->base_addr; + hmp = (struct hamachi_private *)dev->priv; + if (test_and_set_bit(0, (void*)&hmp->in_interrupt)) { + printk(KERN_ERR "%s: Re-entering the interrupt handler.\n", dev->name); + hmp->in_interrupt = 0; /* Avoid future hang on bug */ + return; + } + + do { + u32 intr_status = readl(ioaddr + InterruptClear); + + if (hmp->msg_level & NETIF_MSG_INTR) + printk(KERN_DEBUG "%s: Hamachi interrupt, status %4.4x.\n", + dev->name, intr_status); + + if (intr_status == 0) + break; + + if (intr_status & IntrRxDone) + hamachi_rx(dev); + + for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) { + int entry = hmp->dirty_tx % TX_RING_SIZE; + if (!(hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))) + break; + if (hmp->msg_level & NETIF_MSG_TX_DONE) + printk(KERN_DEBUG "%s: Transmit done, Tx status %8.8x.\n", + dev->name, hmp->tx_ring[entry].status_n_length); + /* Free the original skb. */ + dev_free_skb_irq(hmp->tx_skbuff[entry]); + hmp->tx_skbuff[entry] = 0; + hmp->stats.tx_packets++; + } + if (hmp->tx_full + && hmp->cur_tx - hmp->dirty_tx < TX_QUEUE_LEN - 4) { + /* The ring is no longer full, clear tbusy. */ + hmp->tx_full = 0; + netif_resume_tx_queue(dev); + } + + /* Abnormal error summary/uncommon events handlers. */ + if (intr_status & + (IntrTxPCIFault | IntrTxPCIErr | IntrRxPCIFault | IntrRxPCIErr | + LinkChange | NegotiationChange | StatsMax)) + hamachi_error(dev, intr_status); + + if (--boguscnt < 0) { + printk(KERN_WARNING "%s: Too much work at interrupt, " + "status=0x%4.4x.\n", + dev->name, intr_status); + break; + } + } while (1); + + if (hmp->msg_level & NETIF_MSG_INTR) + printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n", + dev->name, (int)readl(ioaddr + IntrStatus)); + clear_bit(0, (void*)&hmp->in_interrupt); + return; +} + +/* This routine is logically part of the interrupt handler, but separated + for clarity and better register allocation. */ +static int hamachi_rx(struct net_device *dev) +{ + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + int entry = hmp->cur_rx % RX_RING_SIZE; + int boguscnt = hmp->dirty_rx + RX_RING_SIZE - hmp->cur_rx; + + if (hmp->msg_level & NETIF_MSG_RX_STATUS) { + printk(KERN_DEBUG " In hamachi_rx(), entry %d status %4.4x.\n", + entry, hmp->rx_ring[entry].status_n_length); + } + + /* If EOP is set on the next entry, it's a new packet. Send it up. */ + while ( ! (hmp->rx_head_desc->status_n_length & cpu_to_le32(DescOwn))) { + struct hamachi_desc *desc = hmp->rx_head_desc; + u32 desc_status = le32_to_cpu(desc->status_n_length); + u16 data_size = desc_status; /* Implicit truncate */ + u8 *buf_addr = hmp->rx_skbuff[entry]->tail; + s32 frame_status = + le32_to_cpu(get_unaligned((s32*)&(buf_addr[data_size - 12]))); + + if (hmp->msg_level & NETIF_MSG_RX_STATUS) + printk(KERN_DEBUG " hamachi_rx() status was %8.8x.\n", + frame_status); + if (--boguscnt < 0) + break; + if ( ! (desc_status & DescEndPacket)) { + printk(KERN_WARNING "%s: Oversized Ethernet frame spanned " + "multiple buffers, entry %#x length %d status %4.4x!\n", + dev->name, hmp->cur_rx, data_size, desc_status); + printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n", + dev->name, desc, &hmp->rx_ring[hmp->cur_rx % RX_RING_SIZE]); + printk(KERN_WARNING "%s: Oversized Ethernet frame -- next status" + " %x last status %x.\n", dev->name, + hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length, + hmp->rx_ring[(hmp->cur_rx-1) % RX_RING_SIZE].status_n_length); + hmp->stats.rx_length_errors++; + } /* else Omit for prototype errata??? */ + if (frame_status & 0x00380000) { + /* There was a error. */ + if (hmp->msg_level & NETIF_MSG_RX_ERR) + printk(KERN_DEBUG " hamachi_rx() Rx error was %8.8x.\n", + frame_status); + hmp->stats.rx_errors++; + if (frame_status & 0x00600000) hmp->stats.rx_length_errors++; + if (frame_status & 0x00080000) hmp->stats.rx_frame_errors++; + if (frame_status & 0x00100000) hmp->stats.rx_crc_errors++; + if (frame_status < 0) hmp->stats.rx_dropped++; + } else { + struct sk_buff *skb; + u16 pkt_len = (frame_status & 0x07ff) - 4; /* Omit CRC */ + +#if ! defined(final_version) && 0 + if (hmp->msg_level & NETIF_MSG_RX_STATUS) + printk(KERN_DEBUG " hamachi_rx() normal Rx pkt length %d" + " of %d, bogus_cnt %d.\n", + pkt_len, data_size, boguscnt); + if (hmp->msg_level & NETIF_MSG_PKTDATA) + printk(KERN_DEBUG"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n", + dev->name, + *(s32*)&(buf_addr[data_size - 20]), + *(s32*)&(buf_addr[data_size - 16]), + *(s32*)&(buf_addr[data_size - 12]), + *(s32*)&(buf_addr[data_size - 8]), + *(s32*)&(buf_addr[data_size - 4])); +#endif + /* Check if the packet is long enough to accept without copying + to a minimally-sized skbuff. */ + if (pkt_len < rx_copybreak + && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) { + skb->dev = dev; + skb_reserve(skb, 2); /* 16 byte align the IP header */ + eth_copy_and_sum(skb, hmp->rx_skbuff[entry]->tail, pkt_len, 0); + skb_put(skb, pkt_len); + } else { + char *temp = skb_put(skb = hmp->rx_skbuff[entry], pkt_len); + hmp->rx_skbuff[entry] = NULL; +#if ! defined(final_version) + if (bus_to_virt(desc->addr) != temp) + printk(KERN_ERR "%s: Internal fault: The skbuff addresses " + "do not match in hamachi_rx: %p vs. %p / %p.\n", + dev->name, bus_to_virt(desc->addr), + skb->head, temp); +#endif + } + skb->protocol = eth_type_trans(skb, dev); + /* Note: checksum -> skb->ip_summed = CHECKSUM_UNNECESSARY; */ + netif_rx(skb); + dev->last_rx = jiffies; + hmp->stats.rx_packets++; + } + entry = (++hmp->cur_rx) % RX_RING_SIZE; + hmp->rx_head_desc = &hmp->rx_ring[entry]; + } + + /* Refill the Rx ring buffers. */ + for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) { + struct sk_buff *skb; + entry = hmp->dirty_rx % RX_RING_SIZE; + if (hmp->rx_skbuff[entry] == NULL) { + skb = dev_alloc_skb(hmp->rx_buf_sz); + hmp->rx_skbuff[entry] = skb; + if (skb == NULL) + break; /* Better luck next round. */ + skb->dev = dev; /* Mark as being used by this device. */ + skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ + hmp->rx_ring[entry].addr = virt_to_desc(skb->tail); + } + if (entry >= RX_RING_SIZE-1) /* Wrap ring */ + hmp->rx_ring[entry].status_n_length = + cpu_to_le32(DescOwn|DescEndPacket|DescEndRing|DescIntr | hmp->rx_buf_sz); + else + hmp->rx_ring[entry].status_n_length = + cpu_to_le32(DescOwn|DescEndPacket|DescIntr | hmp->rx_buf_sz); + } + + /* Restart Rx engine if stopped. */ + writew(1, dev->base_addr + RxCmd); + return 0; +} + +/* This is more properly named "uncommon interrupt events", as it covers more + than just errors. */ +static void hamachi_error(struct net_device *dev, int intr_status) +{ + long ioaddr = dev->base_addr; + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + + if (intr_status & (LinkChange|NegotiationChange)) { + if (hmp->msg_level & NETIF_MSG_LINK) + printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl" + " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n", + dev->name, (int)readw(ioaddr + 0x0E0), + (int)readw(ioaddr + 0x0E2), + (int)readw(ioaddr + ANLinkPartnerAbility), + (int)readl(ioaddr + IntrStatus)); + if (readw(ioaddr + ANStatus) & 0x20) { + writeb(0x01, ioaddr + LEDCtrl); + netif_link_up(dev); + } else { + writeb(0x03, ioaddr + LEDCtrl); + netif_link_down(dev); + } + } + if (intr_status & StatsMax) { + hamachi_get_stats(dev); + /* Read the overflow bits to clear. */ + readl(ioaddr + 0x36C); + readl(ioaddr + 0x3F0); + } + if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange)) + && (hmp->msg_level & NETIF_MSG_DRV)) + printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n", + dev->name, intr_status); + /* Hmmmmm, it's not clear how to recover from PCI faults. */ + if (intr_status & (IntrTxPCIErr | IntrTxPCIFault)) + hmp->stats.tx_fifo_errors++; + if (intr_status & (IntrRxPCIErr | IntrRxPCIFault)) + hmp->stats.rx_fifo_errors++; +} + +static int hamachi_close(struct net_device *dev) +{ + long ioaddr = dev->base_addr; + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + int i; + + netif_stop_tx_queue(dev); + + if (hmp->msg_level & NETIF_MSG_IFDOWN) { + printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x " + "Rx %4.4x Int %2.2x.\n", + dev->name, (int)readw(ioaddr + TxStatus), + (int)readw(ioaddr + RxStatus), (int)readl(ioaddr + IntrStatus)); + printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n", + dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx, + hmp->dirty_rx); + } + + /* Disable interrupts by clearing the interrupt mask. */ + writel(0x0000, ioaddr + InterruptEnable); + + /* Stop the chip's Tx and Rx processes. */ + writel(2, ioaddr + RxCmd); + writew(2, ioaddr + TxCmd); + + del_timer(&hmp->timer); + +#ifdef __i386__ + if (hmp->msg_level & NETIF_MSG_IFDOWN) { + printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n", + (int)virt_to_bus(hmp->tx_ring)); + for (i = 0; i < TX_RING_SIZE; i++) + printk(" %c #%d desc. %8.8x %8.8x.\n", + readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ', + i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr); + printk("\n"KERN_DEBUG " Rx ring %8.8x:\n", + (int)virt_to_bus(hmp->rx_ring)); + for (i = 0; i < RX_RING_SIZE; i++) { + printk(KERN_DEBUG " %c #%d desc. %8.8x %8.8x\n", + readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ', + i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr); + if (*(u8*)hmp->rx_ring[i].addr != 0x69) { + int j; + for (j = 0; j < 0x50; j++) + printk(" %4.4x", ((u16*)hmp->rx_ring[i].addr)[j]); + printk("\n"); + } + } + } +#endif /* __i386__ debugging only */ + + free_irq(dev->irq, dev); + + /* Free all the skbuffs in the Rx queue. */ + for (i = 0; i < RX_RING_SIZE; i++) { + hmp->rx_ring[i].status_n_length = 0; + hmp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */ + if (hmp->rx_skbuff[i]) { +#if LINUX_VERSION_CODE < 0x20100 + hmp->rx_skbuff[i]->free = 1; +#endif + dev_free_skb(hmp->rx_skbuff[i]); + } + hmp->rx_skbuff[i] = 0; + } + for (i = 0; i < TX_RING_SIZE; i++) { + if (hmp->tx_skbuff[i]) + dev_free_skb(hmp->tx_skbuff[i]); + hmp->tx_skbuff[i] = 0; + } + + writeb(0x00, ioaddr + LEDCtrl); + + MOD_DEC_USE_COUNT; + + return 0; +} + +static struct net_device_stats *hamachi_get_stats(struct net_device *dev) +{ + long ioaddr = dev->base_addr; + struct hamachi_private *hmp = (struct hamachi_private *)dev->priv; + + /* We should lock this segment of code for SMP eventually, although + the vulnerability window is very small and statistics are + non-critical. */ +#if LINUX_VERSION_CODE >= 0x20119 + hmp->stats.rx_bytes += readl(ioaddr + 0x330); /* Total Uni+Brd+Multi */ + hmp->stats.tx_bytes += readl(ioaddr + 0x3B0); /* Total Uni+Brd+Multi */ +#endif + hmp->stats.multicast += readl(ioaddr + 0x320); /* Multicast Rx */ + + hmp->stats.rx_length_errors += readl(ioaddr + 0x368); /* Over+Undersized */ + hmp->stats.rx_over_errors += readl(ioaddr + 0x35C); /* Jabber */ + hmp->stats.rx_crc_errors += readl(ioaddr + 0x360); + hmp->stats.rx_frame_errors += readl(ioaddr + 0x364); /* Symbol Errs */ + hmp->stats.rx_missed_errors += readl(ioaddr + 0x36C); /* Dropped */ + + return &hmp->stats; +} + +static void set_rx_mode(struct net_device *dev) +{ + struct hamachi_private *np = (void *)dev->priv; + long ioaddr = dev->base_addr; + int new_rx_mode; + + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + /* Unconditionally log net taps. */ + printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name); + new_rx_mode = 0x000F; + } else if (dev->mc_count > np->multicast_filter_limit || + (dev->flags & IFF_ALLMULTI)) { + /* Too many to match, or accept all multicasts. */ + new_rx_mode = 0x000B; + } else if (dev->mc_count > 0) { /* Must use the CAM filter. */ + struct dev_mc_list *mclist; + int i; + for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; + i++, mclist = mclist->next) { + writel(*(u32*)(mclist->dmi_addr), ioaddr + 0x100 + i*8); + writel(0x20000 | (*(u16*)&mclist->dmi_addr[4]), + ioaddr + 0x104 + i*8); + } + /* Clear remaining entries. */ + for (; i < 64; i++) + writel(0, ioaddr + 0x104 + i*8); + new_rx_mode = 0x0003; + } else { /* Normal, unicast/broadcast-only mode. */ + new_rx_mode = 0x0001; + } + if (np->rx_mode != new_rx_mode) { + np->rx_mode = new_rx_mode; + writew(new_rx_mode, ioaddr + AddrMode); + } +} + +static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct hamachi_private *np = (void *)dev->priv; + long ioaddr = dev->base_addr; + u16 *data = (u16 *)&rq->ifr_data; + u32 *data32 = (void *)&rq->ifr_data; + + switch(cmd) { + case 0x8947: case 0x89F0: + /* SIOCGMIIPHY: Get the address of the PHY in use. */ + data[0] = np->phys[0] & 0x1f; + /* Fall Through */ + case 0x8948: case 0x89F1: + /* SIOCGMIIREG: Read the specified MII register. */ + data[3] = mdio_read(ioaddr, data[0] & 0x1f, data[1] & 0x1f); + return 0; + case 0x8949: case 0x89F2: + /* SIOCSMIIREG: Write the specified MII register */ + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + /* We are always full duplex. Skip recording the advertised value. */ + mdio_write(ioaddr, data[0] & 0x1f, data[1] & 0x1f, data[2]); + return 0; + case SIOCGPARAMS: + data32[0] = np->msg_level; + data32[1] = np->multicast_filter_limit; + data32[2] = np->max_interrupt_work; + data32[3] = np->rx_copybreak; + return 0; + case SIOCSPARAMS: { + /* Set rx,tx intr params, from Eric Kasten. */ + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + np->msg_level = data32[0]; + np->max_interrupt_work = data32[2]; + writel(data32[1], dev->base_addr + TxIntrCtrl); + writel(data32[3], dev->base_addr + RxIntrCtrl); + printk(KERN_INFO "%s: Set interrupt mitigate paramters tx %08x, " + "rx %08x.\n", dev->name, + (int) readl(dev->base_addr + TxIntrCtrl), + (int) readl(dev->base_addr + RxIntrCtrl)); + return 0; + } + default: + return -EOPNOTSUPP; + } +} + +#ifdef HAVE_CHANGE_MTU +static int change_mtu(struct net_device *dev, int new_mtu) +{ + if ((new_mtu < 68) || (new_mtu > 1536)) + return -EINVAL; + if (netif_running(dev)) + return -EBUSY; + printk(KERN_NOTICE "%s: Changing MTU to %d.\n", dev->name, new_mtu); + dev->mtu = new_mtu; + return 0; +} +#endif + + +#ifdef MODULE +int init_module(void) +{ + if (debug >= NETIF_MSG_DRV) /* Emit version even if no cards detected. */ + printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2); + return pci_drv_register(&hamachi_drv_id, NULL); +} + +void cleanup_module(void) +{ + struct net_device *next_dev; + + pci_drv_unregister(&hamachi_drv_id); + + /* No need to check MOD_IN_USE, as sys_delete_module() checks. */ + while (root_hamachi_dev) { + struct hamachi_private *hmp = (void *)(root_hamachi_dev->priv); + unregister_netdev(root_hamachi_dev); + iounmap((char *)root_hamachi_dev->base_addr); + next_dev = hmp->next_module; + if (hmp->priv_addr) + kfree(hmp->priv_addr); + kfree(root_hamachi_dev); + root_hamachi_dev = next_dev; + } +} + +#endif /* MODULE */ + +/* + * Local variables: + * compile-command: "make KERNVER=`uname -r` hamachi.o" + * compile-cmd: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c hamachi.c" + * simple-compile-command: "gcc -DMODULE -O6 -c hamachi.c" + * c-indent-level: 4 + * c-basic-offset: 4 + * tab-width: 4 + * End: + */ |