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Diffstat (limited to 'linux/src/drivers/net/yellowfin.c')
| -rw-r--r-- | linux/src/drivers/net/yellowfin.c | 1482 |
1 files changed, 1482 insertions, 0 deletions
diff --git a/linux/src/drivers/net/yellowfin.c b/linux/src/drivers/net/yellowfin.c new file mode 100644 index 0000000..9d7ace8 --- /dev/null +++ b/linux/src/drivers/net/yellowfin.c @@ -0,0 +1,1482 @@ +/* yellowfin.c: A Packet Engines G-NIC ethernet driver for linux. */ +/* + Written 1997-2003 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. + + This driver is for the Packet Engines G-NIC PCI Gigabit Ethernet adapter. + It also supports the Symbios Logic version of the same chip core. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 914 Bay Ridge Road, Suite 220 + Annapolis MD 21403 + + Support information and updates available at + http://www.scyld.com/network/yellowfin.html + The information and support mailing lists are based at + http://www.scyld.com/mailman/listinfo/ +*/ + +/* These identify the driver base version and may not be removed. */ +static const char version1[] = +"yellowfin.c:v1.10 7/22/2003 Written by Donald Becker <becker@scyld.com>\n"; +static const char version2[] = +" http://www.scyld.com/network/yellowfin.html\n"; + +/* 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 = 20; + +/* Maximum number of multicast addresses to filter (vs. rx-all-multicast). + Typical is a 64 element hash table based on the Ethernet CRC. */ +static int multicast_filter_limit = 64; + +#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ +/* System-wide count of bogus-rx frames. */ +static int bogus_rx = 0; +static int dma_ctrl = 0x004A0263; /* Constrained by errata */ +static int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */ +#elif YF_NEW /* A future perfect board :->. */ +static int dma_ctrl = 0x00CAC277; /* Override when loading module! */ +static int fifo_cfg = 0x0028; +#else +static int dma_ctrl = 0x004A0263; /* Constrained by errata */ +static int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */ +#endif + +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1518 effectively disables this feature. */ +static int rx_copybreak = 0; + +/* Used to pass the media type, etc. + No media types are currently defined. These options exist only for + compatibility with other drivers. +*/ +#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}; + +/* Do ugly workaround for GX server chipset errata. */ +static int gx_fix = 0; + +/* Operational parameters that are set at compile time. */ + +/* Keep the ring sizes a power of two for efficiency. + Making the Tx ring too large decreases the effectiveness of channel + bonding and packet priority, confuses the system network buffer limits, + and wastes memory. + Too-large receive rings waste memory and confound network buffer limits. +*/ +#define TX_RING_SIZE 16 +#define TX_QUEUE_SIZE 12 /* Must be > 4 && <= TX_RING_SIZE */ +#define RX_RING_SIZE 64 + +/* 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/unaligned.h> +#include <asm/bitops.h> +#include <asm/io.h> + +#ifdef INLINE_PCISCAN +#include "k_compat.h" +#else +#include "pci-scan.h" +#include "kern_compat.h" +#endif + +/* Condensed operations for readability. */ +#define virt_to_le32desc(addr) cpu_to_le32(virt_to_bus(addr)) +#define le32desc_to_virt(addr) bus_to_virt(le32_to_cpu(addr)) + +#if (LINUX_VERSION_CODE >= 0x20100) && defined(MODULE) +char kernel_version[] = UTS_RELEASE; +#endif + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("Packet Engines Yellowfin G-NIC 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(gx_fix, "i"); +MODULE_PARM_DESC(debug, "Driver message level enable (0-31)"); +MODULE_PARM_DESC(options, "Force transceiver type or fixed speed+duplex"); +MODULE_PARM_DESC(rx_copybreak, + "Breakpoint in bytes for copy-only-tiny-frames"); +MODULE_PARM_DESC(full_duplex, + "Non-zero to force full duplex, non-negotiated link " + "(deprecated)."); +MODULE_PARM_DESC(max_interrupt_work, + "Driver maximum events handled per interrupt"); +MODULE_PARM_DESC(multicast_filter_limit, + "Multicast addresses before switching to Rx-all-multicast"); +MODULE_PARM_DESC(gx_fix, "Set to work around old GX chipset errata"); + +/* + Theory of Operation + +I. Board Compatibility + +This device driver is designed for the Packet Engines "Yellowfin" Gigabit +Ethernet adapter. The only PCA currently supported is the G-NIC 64-bit +PCI card. + +II. Board-specific settings + +PCI bus devices are configured by the system at boot time, so no jumpers +need to be set on the board. The system BIOS preferably should assign the +PCI INTA signal to an otherwise unused system IRQ line. +Note: Kernel versions earlier than 1.3.73 do not support shared PCI +interrupt lines. + +III. Driver operation + +IIIa. Ring buffers + +The Yellowfin uses the Descriptor Based DMA Architecture specified by Apple. +This is a descriptor list scheme similar to that used by the EEPro100 and +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. + +The driver allocates full frame size skbuffs for the Rx ring buffers at +open() time and passes the skb->data field to the Yellowfin 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. For small frames the copying cost is negligible (esp. considering +that we are pre-loading the cache with immediately useful header +information). For large frames the copying cost is non-trivial, and the +larger copy might flush the cache of useful data. + +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 'yp->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 'yp->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 G-NIC boards. +Thanks to Bruce Faust of Digitalscape for providing both their SYM53C885 board +and an AlphaStation to verifty the Alpha port! + +IVb. References + +Yellowfin Engineering Design Specification, 4/23/97 Preliminary/Confidential +Symbios SYM53C885 PCI-SCSI/Fast Ethernet Multifunction Controller Preliminary + Data Manual v3.0 +http://cesdis.gsfc.nasa.gov/linux/misc/NWay.html +http://cesdis.gsfc.nasa.gov/linux/misc/100mbps.html + +IVc. Errata + +See Packet Engines confidential appendix (prototype chips only). +*/ + + + +static void *yellowfin_probe1(struct pci_dev *pdev, void *init_dev, + long ioaddr, int irq, int chip_idx, int fnd_cnt); +enum capability_flags { + HasMII=1, FullTxStatus=2, IsGigabit=4, HasMulticastBug=8, FullRxStatus=16, + HasMACAddrBug=32, /* Only on early revs. */ +}; +/* The PCI I/O space extent. */ +#define YELLOWFIN_SIZE 0x100 +#ifdef USE_IO_OPS +#define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_IO | PCI_ADDR0) +#else +#define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR1) +#endif + +static struct pci_id_info pci_id_tbl[] = { + {"Yellowfin G-NIC Gigabit Ethernet", { 0x07021000, 0xffffffff}, + PCI_IOTYPE, YELLOWFIN_SIZE, + FullTxStatus | IsGigabit | HasMulticastBug | HasMACAddrBug}, + {"Symbios SYM83C885", { 0x07011000, 0xffffffff}, + PCI_IOTYPE, YELLOWFIN_SIZE, HasMII }, + {0,}, +}; + +struct drv_id_info yellowfin_drv_id = { + "yellowfin", PCI_HOTSWAP, PCI_CLASS_NETWORK_ETHERNET<<8, pci_id_tbl, + yellowfin_probe1, }; + +/* Offsets to the Yellowfin registers. Various sizes and alignments. */ +enum yellowfin_offsets { + TxCtrl=0x00, TxStatus=0x04, TxPtr=0x0C, + TxIntrSel=0x10, TxBranchSel=0x14, TxWaitSel=0x18, + RxCtrl=0x40, RxStatus=0x44, RxPtr=0x4C, + RxIntrSel=0x50, RxBranchSel=0x54, RxWaitSel=0x58, + EventStatus=0x80, IntrEnb=0x82, IntrClear=0x84, IntrStatus=0x86, + ChipRev=0x8C, DMACtrl=0x90, TxThreshold=0x94, + Cnfg=0xA0, FrameGap0=0xA2, FrameGap1=0xA4, + MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC, + MII_Status=0xAE, + RxDepth=0xB8, FlowCtrl=0xBC, + AddrMode=0xD0, StnAddr=0xD2, HashTbl=0xD8, FIFOcfg=0xF8, + EEStatus=0xF0, EECtrl=0xF1, EEAddr=0xF2, EERead=0xF3, EEWrite=0xF4, + EEFeature=0xF5, +}; + +/* The Yellowfin Rx and Tx buffer descriptors. + Elements are written as 32 bit for endian portability. */ +struct yellowfin_desc { + u32 dbdma_cmd; + u32 addr; + u32 branch_addr; + u32 result_status; +}; + +struct tx_status_words { +#if defined(__powerpc__) + u16 tx_errs; + u16 tx_cnt; + u16 paused; + u16 total_tx_cnt; +#else /* Little endian chips. */ + u16 tx_cnt; + u16 tx_errs; + u16 total_tx_cnt; + u16 paused; +#endif +}; + +/* Bits in yellowfin_desc.cmd */ +enum desc_cmd_bits { + CMD_TX_PKT=0x10000000, CMD_RX_BUF=0x20000000, CMD_TXSTATUS=0x30000000, + CMD_NOP=0x60000000, CMD_STOP=0x70000000, + BRANCH_ALWAYS=0x0C0000, INTR_ALWAYS=0x300000, WAIT_ALWAYS=0x030000, + BRANCH_IFTRUE=0x040000, +}; + +/* Bits in yellowfin_desc.status */ +enum desc_status_bits { RX_EOP=0x0040, }; + +/* Bits in the interrupt status/mask registers. */ +enum intr_status_bits { + IntrRxDone=0x01, IntrRxInvalid=0x02, IntrRxPCIFault=0x04,IntrRxPCIErr=0x08, + IntrTxDone=0x10, IntrTxInvalid=0x20, IntrTxPCIFault=0x40,IntrTxPCIErr=0x80, + IntrEarlyRx=0x100, IntrWakeup=0x200, }; + +#define PRIV_ALIGN 31 /* Required alignment mask */ +struct yellowfin_private { + /* Descriptor rings first for alignment. + Tx requires a second descriptor for status. */ + struct yellowfin_desc rx_ring[RX_RING_SIZE]; + struct yellowfin_desc tx_ring[TX_RING_SIZE*2]; + struct net_device *next_module; + void *priv_addr; /* Unaligned address for kfree */ + /* 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 later free(). */ + struct sk_buff* tx_skbuff[TX_RING_SIZE]; + struct tx_status_words tx_status[TX_RING_SIZE]; + struct timer_list timer; /* Media selection timer. */ + struct net_device_stats stats; + /* Frequently used and paired value: keep adjacent for cache effect. */ + int msg_level; + int chip_id, drv_flags; + struct pci_dev *pci_dev; + long in_interrupt; + int max_interrupt_work; + + struct yellowfin_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; + + struct tx_status_words *tx_tail_desc; + unsigned int cur_tx, dirty_tx; + int tx_threshold; + 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. */ + /* Rx multicast filter. */ + u16 mc_filter[4]; + int rx_mode; + int multicast_filter_limit; +}; + +static int read_eeprom(long ioaddr, 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); +#ifdef HAVE_PRIVATE_IOCTL +static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +#endif +static int yellowfin_open(struct net_device *dev); +static void yellowfin_timer(unsigned long data); +static void yellowfin_tx_timeout(struct net_device *dev); +static void yellowfin_init_ring(struct net_device *dev); +static int yellowfin_start_xmit(struct sk_buff *skb, struct net_device *dev); +static void yellowfin_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +static int yellowfin_rx(struct net_device *dev); +static void yellowfin_error(struct net_device *dev, int intr_status); +static int yellowfin_close(struct net_device *dev); +static struct net_device_stats *yellowfin_get_stats(struct net_device *dev); +static void set_rx_mode(struct net_device *dev); + + + +/* A list of installed Yellowfin devices, for removing the driver module. */ +static struct net_device *root_yellowfin_dev = NULL; + +#ifndef MODULE +int yellowfin_probe(struct net_device *dev) +{ + if (pci_drv_register(&yellowfin_drv_id, dev) < 0) + return -ENODEV; + printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2); + return 0; +} +#endif + +static void *yellowfin_probe1(struct pci_dev *pdev, void *init_dev, + long ioaddr, int irq, int chip_idx, int find_cnt) +{ + struct net_device *dev; + struct yellowfin_private *np; + void *priv_mem; + int i, option = find_cnt < MAX_UNITS ? options[find_cnt] : 0; + int drv_flags = pci_id_tbl[chip_idx].drv_flags; + + dev = init_etherdev(init_dev, 0); + if (!dev) + return NULL; + + printk(KERN_INFO "%s: %s type %8x at 0x%lx, ", + dev->name, pci_id_tbl[chip_idx].name, (int)inl(ioaddr + ChipRev), + ioaddr); + + if (drv_flags & IsGigabit) + for (i = 0; i < 6; i++) + dev->dev_addr[i] = inb(ioaddr + StnAddr + i); + else { + int ee_offset = (read_eeprom(ioaddr, 6) == 0xff ? 0x100 : 0); + for (i = 0; i < 6; i++) + dev->dev_addr[i] = read_eeprom(ioaddr, ee_offset + 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); + + /* Reset the chip. */ + outl(0x80000000, ioaddr + DMACtrl); + + /* 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; + + /* We do a request_region() only to register /proc/ioports info. */ + request_region(ioaddr, pci_id_tbl[chip_idx].io_size, dev->name); + + 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_yellowfin_dev; + root_yellowfin_dev = dev; + + np->pci_dev = pdev; + np->chip_id = chip_idx; + np->drv_flags = 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; + + if (dev->mem_start) + option = dev->mem_start; + + /* The lower four bits are the media type. */ + if (option > 0) { + if (option & 0x220) + np->full_duplex = 1; + np->default_port = option & 15; + if (np->default_port) + np->medialock = 1; + } + if (find_cnt < MAX_UNITS && full_duplex[find_cnt] > 0) + np->full_duplex = 1; + + if (np->full_duplex) + np->duplex_lock = 1; + + /* The Yellowfin-specific entries in the device structure. */ + dev->open = &yellowfin_open; + dev->hard_start_xmit = &yellowfin_start_xmit; + dev->stop = &yellowfin_close; + dev->get_stats = &yellowfin_get_stats; + dev->set_multicast_list = &set_rx_mode; + dev->do_ioctl = &mii_ioctl; + + if (np->drv_flags & HasMII) { + 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; + } + + return dev; +} + +static int read_eeprom(long ioaddr, int location) +{ + int bogus_cnt = 10000; /* Typical 33Mhz: 1050 ticks */ + + outb(location, ioaddr + EEAddr); + outb(0x30 | ((location >> 8) & 7), ioaddr + EECtrl); + while ((inb(ioaddr + EEStatus) & 0x80) && --bogus_cnt > 0) + ; + return inb(ioaddr + EERead); +} + +/* 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; + + outw((phy_id<<8) + location, ioaddr + MII_Addr); + outw(1, ioaddr + MII_Cmd); + for (i = 10000; i >= 0; i--) + if ((inw(ioaddr + MII_Status) & 1) == 0) + break; + return inw(ioaddr + MII_Rd_Data); +} + +static void mdio_write(long ioaddr, int phy_id, int location, int value) +{ + int i; + + outw((phy_id<<8) + location, ioaddr + MII_Addr); + outw(value, ioaddr + MII_Wr_Data); + + /* Wait for the command to finish. */ + for (i = 10000; i >= 0; i--) + if ((inw(ioaddr + MII_Status) & 1) == 0) + break; + return; +} + + +static int yellowfin_open(struct net_device *dev) +{ + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + long ioaddr = dev->base_addr; + int i; + + /* Reset the chip. */ + outl(0x80000000, ioaddr + DMACtrl); + + MOD_INC_USE_COUNT; + + if (request_irq(dev->irq, &yellowfin_interrupt, SA_SHIRQ, dev->name, + dev)) { + MOD_DEC_USE_COUNT; + return -EAGAIN; + } + + if (yp->msg_level & NETIF_MSG_IFUP) + printk(KERN_DEBUG "%s: yellowfin_open() irq %d.\n", + dev->name, dev->irq); + + yellowfin_init_ring(dev); + + outl(virt_to_bus(yp->rx_ring), ioaddr + RxPtr); + outl(virt_to_bus(yp->tx_ring), ioaddr + TxPtr); + + for (i = 0; i < 6; i++) + outb(dev->dev_addr[i], ioaddr + StnAddr + i); + + /* Set up various condition 'select' registers. + There are no options here. */ + outl(0x00800080, ioaddr + TxIntrSel); /* Interrupt on Tx abort */ + outl(0x00800080, ioaddr + TxBranchSel); /* Branch on Tx abort */ + outl(0x00400040, ioaddr + TxWaitSel); /* Wait on Tx status */ + outl(0x00400040, ioaddr + RxIntrSel); /* Interrupt on Rx done */ + outl(0x00400040, ioaddr + RxBranchSel); /* Branch on Rx error */ + outl(0x00400040, ioaddr + RxWaitSel); /* Wait on Rx done */ + + /* Initialize other registers: with so many this eventually this will + converted to an offset/value list. */ + outl(dma_ctrl, ioaddr + DMACtrl); + outw(fifo_cfg, ioaddr + FIFOcfg); + /* Enable automatic generation of flow control frames, period 0xffff. */ + outl(0x0030FFFF, ioaddr + FlowCtrl); + + yp->tx_threshold = 32; + outl(yp->tx_threshold, ioaddr + TxThreshold); + + if (dev->if_port == 0) + dev->if_port = yp->default_port; + + yp->in_interrupt = 0; + + /* Setting the Rx mode will start the Rx process. */ + if (yp->drv_flags & IsGigabit) { + /* We are always in full-duplex mode with gigabit! */ + yp->full_duplex = 1; + outw(0x01CF, ioaddr + Cnfg); + } else { + outw(0x0018, ioaddr + FrameGap0); /* 0060/4060 for non-MII 10baseT */ + outw(0x1018, ioaddr + FrameGap1); + outw(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg); + } + yp->rx_mode = 0; + set_rx_mode(dev); + netif_start_tx_queue(dev); + + /* Enable interrupts by setting the interrupt mask. */ + outw(0x81ff, ioaddr + IntrEnb); /* See enum intr_status_bits */ + outw(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */ + outl(0x80008000, ioaddr + RxCtrl); /* Start Rx and Tx channels. */ + outl(0x80008000, ioaddr + TxCtrl); + + if (yp->msg_level & NETIF_MSG_IFUP) + printk(KERN_DEBUG "%s: Done yellowfin_open().\n", + dev->name); + + /* Set the timer to check for link beat. */ + init_timer(&yp->timer); + yp->timer.expires = jiffies + 3*HZ; + yp->timer.data = (unsigned long)dev; + yp->timer.function = &yellowfin_timer; /* timer handler */ + add_timer(&yp->timer); + + return 0; +} + +static void yellowfin_timer(unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + long ioaddr = dev->base_addr; + int next_tick = 60*HZ; + + if (yp->msg_level & NETIF_MSG_TIMER) + printk(KERN_DEBUG "%s: Yellowfin timer tick, status %8.8x.\n", + dev->name, inw(ioaddr + IntrStatus)); + + if (jiffies - dev->trans_start > TX_TIMEOUT + && yp->cur_tx - yp->dirty_tx > 1 + && netif_queue_paused(dev)) + yellowfin_tx_timeout(dev); + + if (yp->mii_cnt) { + int mii_reg1 = mdio_read(ioaddr, yp->phys[0], 1); + int mii_reg5 = mdio_read(ioaddr, yp->phys[0], 5); + int negotiated = mii_reg5 & yp->advertising; + if (yp->msg_level & NETIF_MSG_TIMER) + printk(KERN_DEBUG "%s: MII #%d status register is %4.4x, " + "link partner capability %4.4x.\n", + dev->name, yp->phys[0], mii_reg1, mii_reg5); + + if ( ! yp->duplex_lock && + ((negotiated & 0x0300) == 0x0100 + || (negotiated & 0x00C0) == 0x0040)) { + yp->full_duplex = 1; + } + outw(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg); + + if (mii_reg1 & 0x0004) + next_tick = 60*HZ; + else + next_tick = 3*HZ; + } + + yp->timer.expires = jiffies + next_tick; + add_timer(&yp->timer); +} + +static void yellowfin_tx_timeout(struct net_device *dev) +{ + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + long ioaddr = dev->base_addr; + + printk(KERN_WARNING "%s: Yellowfin transmit timed out at %d/%d Tx " + "status %4.4x, Rx status %4.4x, resetting...\n", + dev->name, yp->cur_tx, yp->dirty_tx, + (int)inl(ioaddr + TxStatus), (int)inl(ioaddr + RxStatus)); + + /* Note: these should be KERN_DEBUG. */ + if (yp->msg_level & NETIF_MSG_TX_ERR) { + int i; + printk(KERN_DEBUG " Rx ring %p: ", yp->rx_ring); + for (i = 0; i < RX_RING_SIZE; i++) + printk(" %8.8x", yp->rx_ring[i].result_status); + printk("\n"KERN_DEBUG" Tx ring %p: ", yp->tx_ring); + for (i = 0; i < TX_RING_SIZE; i++) + printk(" %4.4x /%8.8x", yp->tx_status[i].tx_errs, + yp->tx_ring[i].result_status); + printk("\n"); + } + + /* If the hardware is found to hang regularly, we will update the code + to reinitialize the chip here. */ + dev->if_port = 0; + + /* Wake the potentially-idle transmit channel. */ + outl(0x10001000, dev->base_addr + TxCtrl); + if (yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE) + netif_unpause_tx_queue(dev); + + dev->trans_start = jiffies; + yp->stats.tx_errors++; + return; +} + +/* Initialize the Rx and Tx rings, along with various 'dev' bits. */ +static void yellowfin_init_ring(struct net_device *dev) +{ + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + int i; + + yp->tx_full = 0; + yp->cur_rx = yp->cur_tx = 0; + yp->dirty_tx = 0; + + yp->rx_buf_sz = dev->mtu + 18 + 15; + /* Match other driver's allocation size when possible. */ + if (yp->rx_buf_sz < PKT_BUF_SZ) + yp->rx_buf_sz = PKT_BUF_SZ; + yp->rx_head_desc = &yp->rx_ring[0]; + + for (i = 0; i < RX_RING_SIZE; i++) { + yp->rx_ring[i].dbdma_cmd = + cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | yp->rx_buf_sz); + yp->rx_ring[i].branch_addr = virt_to_le32desc(&yp->rx_ring[i+1]); + } + /* Mark the last entry as wrapping the ring. */ + yp->rx_ring[i-1].branch_addr = virt_to_le32desc(&yp->rx_ring[0]); + + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb = dev_alloc_skb(yp->rx_buf_sz); + yp->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. */ + yp->rx_ring[i].addr = virt_to_le32desc(skb->tail); + } + yp->rx_ring[i-1].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->dirty_rx = (unsigned int)(i - RX_RING_SIZE); + +#define NO_TXSTATS +#ifdef NO_TXSTATS + /* In this mode the Tx ring needs only a single descriptor. */ + for (i = 0; i < TX_RING_SIZE; i++) { + yp->tx_skbuff[i] = 0; + yp->tx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->tx_ring[i].branch_addr = virt_to_le32desc(&yp->tx_ring[i+1]); + } + /* Wrap ring */ + yp->tx_ring[--i].dbdma_cmd = cpu_to_le32(CMD_STOP | BRANCH_ALWAYS); + yp->tx_ring[i].branch_addr = virt_to_le32desc(&yp->tx_ring[0]); +#else + /* Tx ring needs a pair of descriptors, the second for the status. */ + for (i = 0; i < TX_RING_SIZE*2; i++) { + yp->tx_skbuff[i/2] = 0; + /* Branch on Tx error. */ + yp->tx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->tx_ring[i].branch_addr = virt_to_le32desc(&yp->tx_ring[i+1]); + i++; + if (yp->flags & FullTxStatus) { + yp->tx_ring[i].dbdma_cmd = + cpu_to_le32(CMD_TXSTATUS | sizeof(yp->tx_status[i])); + yp->tx_ring[i].request_cnt = sizeof(yp->tx_status[i]); + yp->tx_ring[i].addr = virt_to_le32desc(&yp->tx_status[i/2]); + } else { /* Symbios chips write only tx_errs word. */ + yp->tx_ring[i].dbdma_cmd = + cpu_to_le32(CMD_TXSTATUS | INTR_ALWAYS | 2); + yp->tx_ring[i].request_cnt = 2; + yp->tx_ring[i].addr = virt_to_le32desc(&yp->tx_status[i/2].tx_errs); + } + yp->tx_ring[i].branch_addr = virt_to_le32desc(&yp->tx_ring[i+1]); + } + /* Wrap ring */ + yp->tx_ring[--i].dbdma_cmd |= cpu_to_le32(BRANCH_ALWAYS | INTR_ALWAYS); + yp->tx_ring[i].branch_addr = virt_to_le32desc(&yp->tx_ring[0]); +#endif + yp->tx_tail_desc = &yp->tx_status[0]; + return; +} + +static int yellowfin_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + unsigned entry; + +#if LINUX_VERSION_CODE < 0x20323 + /* 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) + yellowfin_tx_timeout(dev); + return 1; + } +#endif + + /* 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 = yp->cur_tx % TX_RING_SIZE; + + yp->tx_skbuff[entry] = skb; + + if (gx_fix) { /* Note: only works for paddable protocols e.g. IP. */ + int cacheline_end = (virt_to_bus(skb->data) + skb->len) % 32; + /* Fix GX chipset errata. */ + if (cacheline_end > 24 || cacheline_end == 0) + skb->len += 32 - cacheline_end + 1; + } +#ifdef NO_TXSTATS + yp->tx_ring[entry].addr = virt_to_le32desc(skb->data); + yp->tx_ring[entry].result_status = 0; + if (entry >= TX_RING_SIZE-1) { + /* New stop command. */ + yp->tx_ring[0].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->tx_ring[TX_RING_SIZE-1].dbdma_cmd = + cpu_to_le32(CMD_TX_PKT|BRANCH_ALWAYS | skb->len); + } else { + yp->tx_ring[entry+1].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->tx_ring[entry].dbdma_cmd = + cpu_to_le32(CMD_TX_PKT | BRANCH_IFTRUE | skb->len); + } + yp->cur_tx++; +#else + yp->tx_ring[entry<<1].request_cnt = skb->len; + yp->tx_ring[entry<<1].addr = virt_to_le32desc(skb->data); + /* The input_last (status-write) command is constant, but we must rewrite + the subsequent 'stop' command. */ + + yp->cur_tx++; + { + unsigned next_entry = yp->cur_tx % TX_RING_SIZE; + yp->tx_ring[next_entry<<1].dbdma_cmd = cpu_to_le32(CMD_STOP); + } + /* Final step -- overwrite the old 'stop' command. */ + + yp->tx_ring[entry<<1].dbdma_cmd = + cpu_to_le32( ((entry % 6) == 0 ? CMD_TX_PKT|INTR_ALWAYS|BRANCH_IFTRUE : + CMD_TX_PKT | BRANCH_IFTRUE) | skb->len); +#endif + + /* Non-x86 Todo: explicitly flush cache lines here. */ + + /* Wake the potentially-idle transmit channel. */ + outl(0x10001000, dev->base_addr + TxCtrl); + + if (yp->cur_tx - yp->dirty_tx >= TX_QUEUE_SIZE) { + netif_stop_tx_queue(dev); + yp->tx_full = 1; + if (yp->cur_tx - (volatile int)yp->dirty_tx < TX_QUEUE_SIZE) { + netif_unpause_tx_queue(dev); + yp->tx_full = 0; + } else + netif_stop_tx_queue(dev); + } else + netif_unpause_tx_queue(dev); /* Typical path */ + dev->trans_start = jiffies; + + if (yp->msg_level & NETIF_MSG_TX_QUEUED) { + printk(KERN_DEBUG "%s: Yellowfin transmit frame #%d queued in slot %d.\n", + dev->name, yp->cur_tx, entry); + } + return 0; +} + +/* The interrupt handler does all of the Rx thread work and cleans up + after the Tx thread. */ +static void yellowfin_interrupt(int irq, void *dev_instance, struct pt_regs *regs) +{ + struct net_device *dev = (struct net_device *)dev_instance; + struct yellowfin_private *yp; + long ioaddr; + int boguscnt = max_interrupt_work; + +#ifndef final_version /* Can never occur. */ + if (dev == NULL) { + printk (KERN_ERR "yellowfin_interrupt(): irq %d for unknown device.\n", irq); + return; + } +#endif + + ioaddr = dev->base_addr; + yp = (struct yellowfin_private *)dev->priv; + if (test_and_set_bit(0, (void*)&yp->in_interrupt)) { + printk(KERN_ERR "%s: Re-entering the interrupt handler.\n", dev->name); + return; + } + + do { + u16 intr_status = inw(ioaddr + IntrClear); + + if (yp->msg_level & NETIF_MSG_INTR) + printk(KERN_DEBUG "%s: Yellowfin interrupt, status %4.4x.\n", + dev->name, intr_status); + + if (intr_status == 0) + break; + + if (intr_status & (IntrRxDone | IntrEarlyRx)) { + yellowfin_rx(dev); + outl(0x10001000, ioaddr + RxCtrl); /* Wake Rx engine. */ + } + +#ifdef NO_TXSTATS + for (; yp->cur_tx - yp->dirty_tx > 0; yp->dirty_tx++) { + int entry = yp->dirty_tx % TX_RING_SIZE; + if (yp->tx_ring[entry].result_status == 0) + break; + yp->stats.tx_packets++; +#if LINUX_VERSION_CODE > 0x20127 + yp->stats.tx_bytes += yp->tx_skbuff[entry]->len; +#endif + /* Free the original skb. */ + dev_free_skb_irq(yp->tx_skbuff[entry]); + yp->tx_skbuff[entry] = 0; + } + if (yp->tx_full + && yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE - 4) { + /* The ring is no longer full, clear tbusy. */ + yp->tx_full = 0; + netif_resume_tx_queue(dev); + } +#else + if (intr_status & IntrTxDone + || yp->tx_tail_desc->tx_errs) { + unsigned dirty_tx = yp->dirty_tx; + + for (dirty_tx = yp->dirty_tx; yp->cur_tx - dirty_tx > 0; + dirty_tx++) { + /* Todo: optimize this. */ + int entry = dirty_tx % TX_RING_SIZE; + u16 tx_errs = yp->tx_status[entry].tx_errs; + +#ifndef final_version + if (yp->msg_level & NETIF_MSG_INTR) + printk(KERN_DEBUG "%s: Tx queue %d check, Tx status " + "%4.4x %4.4x %4.4x %4.4x.\n", + dev->name, entry, + yp->tx_status[entry].tx_cnt, + yp->tx_status[entry].tx_errs, + yp->tx_status[entry].total_tx_cnt, + yp->tx_status[entry].paused); +#endif + if (tx_errs == 0) + break; /* It still hasn't been Txed */ + if (tx_errs & 0xF810) { + /* There was an major error, log it. */ +#ifndef final_version + if (yp->msg_level & NETIF_MSG_TX_ERR) + printk(KERN_DEBUG "%s: Transmit error, Tx status %4.4x.\n", + dev->name, tx_errs); +#endif + yp->stats.tx_errors++; + if (tx_errs & 0xF800) yp->stats.tx_aborted_errors++; + if (tx_errs & 0x0800) yp->stats.tx_carrier_errors++; + if (tx_errs & 0x2000) yp->stats.tx_window_errors++; + if (tx_errs & 0x8000) yp->stats.tx_fifo_errors++; +#ifdef ETHER_STATS + if (tx_errs & 0x1000) yp->stats.collisions16++; +#endif + } else { +#ifndef final_version + if (yp->msg_level & NETIF_MSG_TX_DONE) + printk(KERN_DEBUG "%s: Normal transmit, Tx status %4.4x.\n", + dev->name, tx_errs); +#endif +#ifdef ETHER_STATS + if (tx_errs & 0x0400) yp->stats.tx_deferred++; +#endif +#if LINUX_VERSION_CODE > 0x20127 + yp->stats.tx_bytes += yp->tx_skbuff[entry]->len; +#endif + yp->stats.collisions += tx_errs & 15; + yp->stats.tx_packets++; + } + /* Free the original skb. */ + dev_free_skb_irq(yp->tx_skbuff[entry]); + yp->tx_skbuff[entry] = 0; + /* Mark status as empty. */ + yp->tx_status[entry].tx_errs = 0; + } + +#ifndef final_version + if (yp->cur_tx - dirty_tx > TX_RING_SIZE) { + printk(KERN_ERR "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n", + dev->name, dirty_tx, yp->cur_tx, yp->tx_full); + dirty_tx += TX_RING_SIZE; + } +#endif + + if (yp->tx_full + && yp->cur_tx - dirty_tx < TX_QUEUE_SIZE - 2) { + /* The ring is no longer full, clear tbusy. */ + yp->tx_full = 0; + netif_resume_tx_queue(dev); + } + + yp->dirty_tx = dirty_tx; + yp->tx_tail_desc = &yp->tx_status[dirty_tx % TX_RING_SIZE]; + } +#endif + + /* Log errors and other uncommon events. */ + if (intr_status & 0x2ee) /* Abnormal error summary. */ + yellowfin_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 (yp->msg_level & NETIF_MSG_INTR) + printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n", + dev->name, inw(ioaddr + IntrStatus)); + + clear_bit(0, (void*)&yp->in_interrupt); + return; +} + +/* This routine is logically part of the interrupt handler, but separated + for clarity and better register allocation. */ +static int yellowfin_rx(struct net_device *dev) +{ + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + int entry = yp->cur_rx % RX_RING_SIZE; + int boguscnt = yp->dirty_rx + RX_RING_SIZE - yp->cur_rx; + + if (yp->msg_level & NETIF_MSG_RX_STATUS) { + printk(KERN_DEBUG " In yellowfin_rx(), entry %d status %8.8x.\n", + entry, yp->rx_ring[entry].result_status); + printk(KERN_DEBUG " #%d desc. %8.8x %8.8x %8.8x.\n", + entry, yp->rx_ring[entry].dbdma_cmd, yp->rx_ring[entry].addr, + yp->rx_ring[entry].result_status); + } + + /* If EOP is set on the next entry, it's a new packet. Send it up. */ + while (yp->rx_head_desc->result_status) { + struct yellowfin_desc *desc = yp->rx_head_desc; + u16 desc_status = le32_to_cpu(desc->result_status) >> 16; + int data_size = + (le32_to_cpu(desc->dbdma_cmd) - le32_to_cpu(desc->result_status)) + & 0xffff; + u8 *buf_addr = le32desc_to_virt(desc->addr); + s16 frame_status = get_unaligned((s16*)&(buf_addr[data_size - 2])); + + if (yp->msg_level & NETIF_MSG_RX_STATUS) + printk(KERN_DEBUG " yellowfin_rx() status was %4.4x.\n", + frame_status); + if (--boguscnt < 0) + break; + if ( ! (desc_status & RX_EOP)) { + printk(KERN_WARNING "%s: Oversized Ethernet frame spanned multiple buffers," + " status %4.4x!\n", dev->name, desc_status); + yp->stats.rx_length_errors++; + } else if ((yp->drv_flags & IsGigabit) && (frame_status & 0x0038)) { + /* There was a error. */ + if (yp->msg_level & NETIF_MSG_RX_ERR) + printk(KERN_DEBUG " yellowfin_rx() Rx error was %4.4x.\n", + frame_status); + yp->stats.rx_errors++; + if (frame_status & 0x0060) yp->stats.rx_length_errors++; + if (frame_status & 0x0008) yp->stats.rx_frame_errors++; + if (frame_status & 0x0010) yp->stats.rx_crc_errors++; + if (frame_status < 0) yp->stats.rx_dropped++; + } else if ( !(yp->drv_flags & IsGigabit) && + ((buf_addr[data_size-1] & 0x85) || buf_addr[data_size-2] & 0xC0)) { + u8 status1 = buf_addr[data_size-2]; + u8 status2 = buf_addr[data_size-1]; + yp->stats.rx_errors++; + if (status1 & 0xC0) yp->stats.rx_length_errors++; + if (status2 & 0x03) yp->stats.rx_frame_errors++; + if (status2 & 0x04) yp->stats.rx_crc_errors++; + if (status2 & 0x80) yp->stats.rx_dropped++; +#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ + } else if ((yp->flags & HasMACAddrBug) && + memcmp(le32desc_to_virt(yp->rx_ring[entry].addr), + dev->dev_addr, 6) != 0 + && memcmp(le32desc_to_virt(yp->rx_ring[entry].addr), + "\377\377\377\377\377\377", 6) != 0) { + if (bogus_rx++ == 0) + printk(KERN_WARNING "%s: Bad frame to %2.2x:%2.2x:%2.2x:%2.2x:" + "%2.2x:%2.2x.\n", + dev->name, buf_addr[0], buf_addr[1], buf_addr[2], + buf_addr[3], buf_addr[4], buf_addr[5]); +#endif + } else { + struct sk_buff *skb; + int pkt_len = data_size - + (yp->chip_id ? 7 : 8 + buf_addr[data_size - 8]); + /* To verify: Yellowfin Length should omit the CRC! */ + +#ifndef final_version + if (yp->msg_level & NETIF_MSG_RX_STATUS) + printk(KERN_DEBUG " yellowfin_rx() normal Rx pkt length %d" + " of %d, bogus_cnt %d.\n", + pkt_len, data_size, boguscnt); +#endif + /* Check if the packet is long enough to just pass up the skbuff + without copying to a properly sized skbuff. */ + if (pkt_len > yp->rx_copybreak) { + char *temp = skb_put(skb = yp->rx_skbuff[entry], pkt_len); + yp->rx_skbuff[entry] = NULL; +#ifndef final_version /* Remove after testing. */ + if (le32desc_to_virt(yp->rx_ring[entry].addr) != temp) + printk(KERN_ERR "%s: Internal fault: The skbuff addresses " + "do not match in yellowfin_rx: %p vs. %p / %p.\n", + dev->name, + le32desc_to_virt(yp->rx_ring[entry].addr), + skb->head, temp); +#endif + } else { + skb = dev_alloc_skb(pkt_len + 2); + if (skb == NULL) + break; + skb->dev = dev; + skb_reserve(skb, 2); /* 16 byte align the IP header */ +#if HAS_IP_COPYSUM + eth_copy_and_sum(skb, yp->rx_skbuff[entry]->tail, pkt_len, 0); + skb_put(skb, pkt_len); +#else + memcpy(skb_put(skb, pkt_len), yp->rx_skbuff[entry]->tail, + pkt_len); +#endif + } + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->last_rx = jiffies; + yp->stats.rx_packets++; +#if LINUX_VERSION_CODE > 0x20127 + yp->stats.rx_bytes += pkt_len; +#endif + } + entry = (++yp->cur_rx) % RX_RING_SIZE; + yp->rx_head_desc = &yp->rx_ring[entry]; + } + + /* Refill the Rx ring buffers. */ + for (; yp->cur_rx - yp->dirty_rx > 0; yp->dirty_rx++) { + entry = yp->dirty_rx % RX_RING_SIZE; + if (yp->rx_skbuff[entry] == NULL) { + struct sk_buff *skb = dev_alloc_skb(yp->rx_buf_sz); + yp->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 */ + yp->rx_ring[entry].addr = virt_to_le32desc(skb->tail); + } + yp->rx_ring[entry].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->rx_ring[entry].result_status = 0; /* Clear complete bit. */ + if (entry != 0) + yp->rx_ring[entry - 1].dbdma_cmd = + cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | yp->rx_buf_sz); + else + yp->rx_ring[RX_RING_SIZE - 1].dbdma_cmd = + cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | BRANCH_ALWAYS + | yp->rx_buf_sz); + } + + return 0; +} + +static void yellowfin_error(struct net_device *dev, int intr_status) +{ + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + + printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n", + dev->name, intr_status); + /* Hmmmmm, it's not clear what to do here. */ + if (intr_status & (IntrTxPCIErr | IntrTxPCIFault)) + yp->stats.tx_errors++; + if (intr_status & (IntrRxPCIErr | IntrRxPCIFault)) + yp->stats.rx_errors++; +} + +static int yellowfin_close(struct net_device *dev) +{ + long ioaddr = dev->base_addr; + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + int i; + + netif_stop_tx_queue(dev); + + if (yp->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, inw(ioaddr + TxStatus), + inw(ioaddr + RxStatus), inw(ioaddr + IntrStatus)); + printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n", + dev->name, yp->cur_tx, yp->dirty_tx, yp->cur_rx, yp->dirty_rx); + } + + /* Disable interrupts by clearing the interrupt mask. */ + outw(0x0000, ioaddr + IntrEnb); + + /* Stop the chip's Tx and Rx processes. */ + outl(0x80000000, ioaddr + RxCtrl); + outl(0x80000000, ioaddr + TxCtrl); + + del_timer(&yp->timer); + +#if defined(__i386__) + if (yp->msg_level & NETIF_MSG_IFDOWN) { + printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n", + (int)virt_to_bus(yp->tx_ring)); + for (i = 0; i < TX_RING_SIZE*2; i++) + printk(" %c #%d desc. %8.8x %8.8x %8.8x %8.8x.\n", + inl(ioaddr + TxPtr) == (long)&yp->tx_ring[i] ? '>' : ' ', + i, yp->tx_ring[i].dbdma_cmd, yp->tx_ring[i].addr, + yp->tx_ring[i].branch_addr, yp->tx_ring[i].result_status); + printk(KERN_DEBUG " Tx status %p:\n", yp->tx_status); + for (i = 0; i < TX_RING_SIZE; i++) + printk(KERN_DEBUG " #%d status %4.4x %4.4x %4.4x %4.4x.\n", + i, yp->tx_status[i].tx_cnt, yp->tx_status[i].tx_errs, + yp->tx_status[i].total_tx_cnt, yp->tx_status[i].paused); + + printk("\n"KERN_DEBUG " Rx ring %8.8x:\n", + (int)virt_to_bus(yp->rx_ring)); + for (i = 0; i < RX_RING_SIZE; i++) { + printk(KERN_DEBUG " %c #%d desc. %8.8x %8.8x %8.8x\n", + inl(ioaddr + RxPtr) == (long)&yp->rx_ring[i] ? '>' : ' ', + i, yp->rx_ring[i].dbdma_cmd, yp->rx_ring[i].addr, + yp->rx_ring[i].result_status); + if (yp->msg_level & NETIF_MSG_PKTDATA) { + if (get_unaligned((u8*)yp->rx_ring[i].addr) != 0x69) { + int j; + for (j = 0; j < 0x50; j++) + printk(" %4.4x", + get_unaligned(((u16*)yp->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++) { + yp->rx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */ + if (yp->rx_skbuff[i]) { +#if LINUX_VERSION_CODE < 0x20100 + yp->rx_skbuff[i]->free = 1; +#endif + dev_free_skb(yp->rx_skbuff[i]); + } + yp->rx_skbuff[i] = 0; + } + for (i = 0; i < TX_RING_SIZE; i++) { + if (yp->tx_skbuff[i]) + dev_free_skb(yp->tx_skbuff[i]); + yp->tx_skbuff[i] = 0; + } + +#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ + if (yp->msg_level & NETIF_MSG_IFDOWN) { + printk(KERN_DEBUG "%s: Received %d frames that we should not have.\n", + dev->name, bogus_rx); + } +#endif + MOD_DEC_USE_COUNT; + + return 0; +} + +static struct net_device_stats *yellowfin_get_stats(struct net_device *dev) +{ + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + return &yp->stats; +} + +/* Set or clear the multicast filter for this adaptor. */ + +/* The little-endian AUTODIN32 ethernet CRC calculation. + N.B. Do not use for bulk data, use a table-based routine instead. + This is common code and should be moved to net/core/crc.c */ +static unsigned const ethernet_polynomial_le = 0xedb88320U; + +static inline unsigned ether_crc_le(int length, unsigned char *data) +{ + unsigned int crc = 0xffffffff; /* Initial value. */ + while(--length >= 0) { + unsigned char current_octet = *data++; + int bit; + for (bit = 8; --bit >= 0; current_octet >>= 1) { + if ((crc ^ current_octet) & 1) { + crc >>= 1; + crc ^= ethernet_polynomial_le; + } else + crc >>= 1; + } + } + return crc; +} + + +static void set_rx_mode(struct net_device *dev) +{ + struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv; + u16 hash_table[4] = {0, 0, 0, 0}; + int mc_change = 0; + int new_rx_mode, i; + + 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 > yp->multicast_filter_limit + || (dev->flags & IFF_ALLMULTI)) { + /* Too many to filter well, or accept all multicasts. */ + new_rx_mode = 0x000B; + } else if (dev->mc_count > 0) { /* Must use the multicast hash table. */ + struct dev_mc_list *mclist; + + for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; + i++, mclist = mclist->next) { + /* Due to a bug in the early chip versions, multiple filter + slots must be set for each address. */ + if (yp->drv_flags & HasMulticastBug) { + set_bit((ether_crc_le(3, mclist->dmi_addr) >> 3) & 0x3f, + hash_table); + set_bit((ether_crc_le(4, mclist->dmi_addr) >> 3) & 0x3f, + hash_table); + set_bit((ether_crc_le(5, mclist->dmi_addr) >> 3) & 0x3f, + hash_table); + } + set_bit((ether_crc_le(6, mclist->dmi_addr) >> 3) & 0x3f, + hash_table); + } + if (memcmp(hash_table, yp->mc_filter, sizeof hash_table) != 0) + mc_change = 1; + new_rx_mode = 0x0003; + } else { /* Normal, unicast/broadcast-only mode. */ + new_rx_mode = 0x0001; + } + + /* Stop the Rx process to change any value. */ + if (yp->rx_mode != new_rx_mode || mc_change) { + long ioaddr = dev->base_addr; + u16 cfg_value = inw(ioaddr + Cnfg); + + outw(cfg_value & ~0x1000, ioaddr + Cnfg); + + yp->rx_mode = new_rx_mode; + outw(new_rx_mode, ioaddr + AddrMode); + memcpy(yp->mc_filter, hash_table, sizeof hash_table); + /* Copy the hash table to the chip. */ + for (i = 0; i < 4; i++) + outw(hash_table[i], ioaddr + HashTbl + i*2); + + /* Restart the Rx process. */ + outw(cfg_value | 0x1000, ioaddr + Cnfg); + } +} + +static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct yellowfin_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; + if (data[0] == np->phys[0]) { + u16 value = data[2]; + switch (data[1]) { + case 0: + /* Check for autonegotiation on or reset. */ + np->medialock = (value & 0x9000) ? 0 : 1; + if (np->medialock) + np->full_duplex = (value & 0x0100) ? 1 : 0; + break; + case 4: np->advertising = value; break; + } + /* Perhaps check_duplex(dev), depending on chip semantics. */ + } + 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: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + np->msg_level = data32[0]; + np->multicast_filter_limit = data32[1]; + np->max_interrupt_work = data32[2]; + np->rx_copybreak = data32[3]; + return 0; + default: + return -EOPNOTSUPP; + } +} + + +#ifdef MODULE +int init_module(void) +{ + /* Emit version even if no cards detected. */ + printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2); + return pci_drv_register(&yellowfin_drv_id, NULL); +} + +void cleanup_module(void) +{ + struct net_device *next_dev; + + pci_drv_unregister(&yellowfin_drv_id); + + /* No need to check MOD_IN_USE, as sys_delete_module() checks. */ + while (root_yellowfin_dev) { + struct yellowfin_private *np = (void *)(root_yellowfin_dev->priv); + unregister_netdev(root_yellowfin_dev); +#ifdef USE_IO_OPS + release_region(root_yellowfin_dev->base_addr, + pci_id_tbl[np->chip_id].io_size); +#else + iounmap((char *)root_yellowfin_dev->base_addr); +#endif + next_dev = np->next_module; + if (np->priv_addr) + kfree(np->priv_addr); + kfree(root_yellowfin_dev); + root_yellowfin_dev = next_dev; + } +} + +#endif /* MODULE */ + +/* + * Local variables: + * compile-command: "make KERNVER=`uname -r` yellowfin.o" + * compile-cmd: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c yellowfin.c" + * simple-compile-command: "gcc -DMODULE -O6 -c yellowfin.c" + * c-indent-level: 4 + * c-basic-offset: 4 + * tab-width: 4 + * End: + */ |