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Diffstat (limited to 'drivers/net/via-rhine.c')
| -rw-r--r-- | drivers/net/via-rhine.c | 2035 |
1 files changed, 2035 insertions, 0 deletions
diff --git a/drivers/net/via-rhine.c b/drivers/net/via-rhine.c new file mode 100644 index 00000000000..7b57d552094 --- /dev/null +++ b/drivers/net/via-rhine.c @@ -0,0 +1,2035 @@ +/* via-rhine.c: A Linux Ethernet device driver for VIA Rhine family chips. */ +/* + Written 1998-2001 by Donald Becker. + + Current Maintainer: Roger Luethi <rl@hellgate.ch> + + 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 designed for the VIA VT86C100A Rhine-I. + It also works with the Rhine-II (6102) and Rhine-III (6105/6105L/6105LOM + and management NIC 6105M). + + 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 contains some changes from the original Donald Becker + version. He may or may not be interested in bug reports on this + code. You can find his versions at: + http://www.scyld.com/network/via-rhine.html + + + Linux kernel version history: + + LK1.1.0: + - Jeff Garzik: softnet 'n stuff + + LK1.1.1: + - Justin Guyett: softnet and locking fixes + - Jeff Garzik: use PCI interface + + LK1.1.2: + - Urban Widmark: minor cleanups, merges from Becker 1.03a/1.04 versions + + LK1.1.3: + - Urban Widmark: use PCI DMA interface (with thanks to the eepro100.c + code) update "Theory of Operation" with + softnet/locking changes + - Dave Miller: PCI DMA and endian fixups + - Jeff Garzik: MOD_xxx race fixes, updated PCI resource allocation + + LK1.1.4: + - Urban Widmark: fix gcc 2.95.2 problem and + remove writel's to fixed address 0x7c + + LK1.1.5: + - Urban Widmark: mdio locking, bounce buffer changes + merges from Beckers 1.05 version + added netif_running_on/off support + + LK1.1.6: + - Urban Widmark: merges from Beckers 1.08b version (VT6102 + mdio) + set netif_running_on/off on startup, del_timer_sync + + LK1.1.7: + - Manfred Spraul: added reset into tx_timeout + + LK1.1.9: + - Urban Widmark: merges from Beckers 1.10 version + (media selection + eeprom reload) + - David Vrabel: merges from D-Link "1.11" version + (disable WOL and PME on startup) + + LK1.1.10: + - Manfred Spraul: use "singlecopy" for unaligned buffers + don't allocate bounce buffers for !ReqTxAlign cards + + LK1.1.11: + - David Woodhouse: Set dev->base_addr before the first time we call + wait_for_reset(). It's a lot happier that way. + Free np->tx_bufs only if we actually allocated it. + + LK1.1.12: + - Martin Eriksson: Allow Memory-Mapped IO to be enabled. + + LK1.1.13 (jgarzik): + - Add ethtool support + - Replace some MII-related magic numbers with constants + + LK1.1.14 (Ivan G.): + - fixes comments for Rhine-III + - removes W_MAX_TIMEOUT (unused) + - adds HasDavicomPhy for Rhine-I (basis: linuxfet driver; my card + is R-I and has Davicom chip, flag is referenced in kernel driver) + - sends chip_id as a parameter to wait_for_reset since np is not + initialized on first call + - changes mmio "else if (chip_id==VT6102)" to "else" so it will work + for Rhine-III's (documentation says same bit is correct) + - transmit frame queue message is off by one - fixed + - adds IntrNormalSummary to "Something Wicked" exclusion list + so normal interrupts will not trigger the message (src: Donald Becker) + (Roger Luethi) + - show confused chip where to continue after Tx error + - location of collision counter is chip specific + - allow selecting backoff algorithm (module parameter) + + LK1.1.15 (jgarzik): + - Use new MII lib helper generic_mii_ioctl + + LK1.1.16 (Roger Luethi) + - Etherleak fix + - Handle Tx buffer underrun + - Fix bugs in full duplex handling + - New reset code uses "force reset" cmd on Rhine-II + - Various clean ups + + LK1.1.17 (Roger Luethi) + - Fix race in via_rhine_start_tx() + - On errors, wait for Tx engine to turn off before scavenging + - Handle Tx descriptor write-back race on Rhine-II + - Force flushing for PCI posted writes + - More reset code changes + + LK1.1.18 (Roger Luethi) + - No filtering multicast in promisc mode (Edward Peng) + - Fix for Rhine-I Tx timeouts + + LK1.1.19 (Roger Luethi) + - Increase Tx threshold for unspecified errors + + LK1.2.0-2.6 (Roger Luethi) + - Massive clean-up + - Rewrite PHY, media handling (remove options, full_duplex, backoff) + - Fix Tx engine race for good + +*/ + +#define DRV_NAME "via-rhine" +#define DRV_VERSION "1.2.0-2.6" +#define DRV_RELDATE "June-10-2004" + + +/* A few user-configurable values. + These may be modified when a driver module is loaded. */ + +static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */ +static int max_interrupt_work = 20; + +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1518 effectively disables this feature. */ +static int rx_copybreak; + +/* + * In case you are looking for 'options[]' or 'full_duplex[]', they + * are gone. Use ethtool(8) instead. + */ + +/* Maximum number of multicast addresses to filter (vs. rx-all-multicast). + The Rhine has a 64 element 8390-like hash table. */ +static const int multicast_filter_limit = 32; + + +/* 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 16 +#define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */ +#define RX_RING_SIZE 16 + + +/* Operational parameters that usually are not changed. */ + +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (2*HZ) + +#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/mii.h> +#include <linux/ethtool.h> +#include <linux/crc32.h> +#include <linux/bitops.h> +#include <asm/processor.h> /* Processor type for cache alignment. */ +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/uaccess.h> + +/* These identify the driver base version and may not be removed. */ +static char version[] __devinitdata = +KERN_INFO DRV_NAME ".c:v1.10-LK" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker\n"; + +/* This driver was written to use PCI memory space. Some early versions + of the Rhine may only work correctly with I/O space accesses. */ +#ifdef CONFIG_VIA_RHINE_MMIO +#define USE_MMIO +#else +#endif + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("VIA Rhine PCI Fast Ethernet driver"); +MODULE_LICENSE("GPL"); + +module_param(max_interrupt_work, int, 0); +module_param(debug, int, 0); +module_param(rx_copybreak, int, 0); +MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt"); +MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)"); +MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames"); + +/* + Theory of Operation + +I. Board Compatibility + +This driver is designed for the VIA 86c100A Rhine-II PCI Fast Ethernet +controller. + +II. Board-specific settings + +Boards with this chip are functional only in a bus-master PCI slot. + +Many operational settings are loaded from the EEPROM to the Config word at +offset 0x78. For most of these settings, this driver assumes that they are +correct. +If this driver is compiled to use PCI memory space operations the EEPROM +must be configured to enable memory ops. + +III. Driver operation + +IIIa. Ring buffers + +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. + +IIIb/c. Transmit/Receive Structure + +This driver attempts to use a zero-copy receive and transmit scheme. + +Alas, all data buffers are required to start on a 32 bit boundary, so +the driver must often copy transmit packets into bounce buffers. + +The driver allocates full frame size skbuffs for the Rx ring buffers at +open() time and passes the skb->data field to the chip 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. Buffers consumed this way are replaced by newly allocated +skbuffs in the last phase of rhine_rx(). + +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. New boards are typically used in 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. When copying is done, the cost is usually mitigated by using +a combined copy/checksum routine. Copying also preloads the cache, which is +most useful with small frames. + +Since the VIA chips are only able to transfer data to buffers on 32 bit +boundaries, the IP header at offset 14 in an ethernet frame isn't +longword aligned for further processing. Copying these unaligned buffers +has the beneficial effect of 16-byte aligning the IP header. + +IIId. 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->priv->lock spinlock. The other thread is the interrupt handler, which +is single threaded by the hardware and interrupt handling software. + +The send packet thread has partial control over the Tx ring. It locks the +dev->priv->lock whenever it's queuing a Tx packet. If the next slot in the ring +is not available it stops the transmit queue by calling netif_stop_queue. + +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. If at least half of the entries in +the Rx ring are available the transmit queue is woken up if it was stopped. + +IV. Notes + +IVb. References + +Preliminary VT86C100A manual from http://www.via.com.tw/ +http://www.scyld.com/expert/100mbps.html +http://www.scyld.com/expert/NWay.html +ftp://ftp.via.com.tw/public/lan/Products/NIC/VT86C100A/Datasheet/VT86C100A03.pdf +ftp://ftp.via.com.tw/public/lan/Products/NIC/VT6102/Datasheet/VT6102_021.PDF + + +IVc. Errata + +The VT86C100A manual is not reliable information. +The 3043 chip does not handle unaligned transmit or receive buffers, resulting +in significant performance degradation for bounce buffer copies on transmit +and unaligned IP headers on receive. +The chip does not pad to minimum transmit length. + +*/ + + +/* This table drives the PCI probe routines. It's mostly boilerplate in all + of the drivers, and will likely be provided by some future kernel. + Note the matching code -- the first table entry matchs all 56** cards but + second only the 1234 card. +*/ + +enum rhine_revs { + VT86C100A = 0x00, + VTunknown0 = 0x20, + VT6102 = 0x40, + VT8231 = 0x50, /* Integrated MAC */ + VT8233 = 0x60, /* Integrated MAC */ + VT8235 = 0x74, /* Integrated MAC */ + VT8237 = 0x78, /* Integrated MAC */ + VTunknown1 = 0x7C, + VT6105 = 0x80, + VT6105_B0 = 0x83, + VT6105L = 0x8A, + VT6107 = 0x8C, + VTunknown2 = 0x8E, + VT6105M = 0x90, /* Management adapter */ +}; + +enum rhine_quirks { + rqWOL = 0x0001, /* Wake-On-LAN support */ + rqForceReset = 0x0002, + rq6patterns = 0x0040, /* 6 instead of 4 patterns for WOL */ + rqStatusWBRace = 0x0080, /* Tx Status Writeback Error possible */ + rqRhineI = 0x0100, /* See comment below */ +}; +/* + * rqRhineI: VT86C100A (aka Rhine-I) uses different bits to enable + * MMIO as well as for the collision counter and the Tx FIFO underflow + * indicator. In addition, Tx and Rx buffers need to 4 byte aligned. + */ + +/* Beware of PCI posted writes */ +#define IOSYNC do { ioread8(ioaddr + StationAddr); } while (0) + +static struct pci_device_id rhine_pci_tbl[] = +{ + {0x1106, 0x3043, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, /* VT86C100A */ + {0x1106, 0x3065, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, /* VT6102 */ + {0x1106, 0x3106, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, /* 6105{,L,LOM} */ + {0x1106, 0x3053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, /* VT6105M */ + { } /* terminate list */ +}; +MODULE_DEVICE_TABLE(pci, rhine_pci_tbl); + + +/* Offsets to the device registers. */ +enum register_offsets { + StationAddr=0x00, RxConfig=0x06, TxConfig=0x07, ChipCmd=0x08, + ChipCmd1=0x09, + IntrStatus=0x0C, IntrEnable=0x0E, + MulticastFilter0=0x10, MulticastFilter1=0x14, + RxRingPtr=0x18, TxRingPtr=0x1C, GFIFOTest=0x54, + MIIPhyAddr=0x6C, MIIStatus=0x6D, PCIBusConfig=0x6E, + MIICmd=0x70, MIIRegAddr=0x71, MIIData=0x72, MACRegEEcsr=0x74, + ConfigA=0x78, ConfigB=0x79, ConfigC=0x7A, ConfigD=0x7B, + RxMissed=0x7C, RxCRCErrs=0x7E, MiscCmd=0x81, + StickyHW=0x83, IntrStatus2=0x84, + WOLcrSet=0xA0, PwcfgSet=0xA1, WOLcgSet=0xA3, WOLcrClr=0xA4, + WOLcrClr1=0xA6, WOLcgClr=0xA7, + PwrcsrSet=0xA8, PwrcsrSet1=0xA9, PwrcsrClr=0xAC, PwrcsrClr1=0xAD, +}; + +/* Bits in ConfigD */ +enum backoff_bits { + BackOptional=0x01, BackModify=0x02, + BackCaptureEffect=0x04, BackRandom=0x08 +}; + +#ifdef USE_MMIO +/* Registers we check that mmio and reg are the same. */ +static const int mmio_verify_registers[] = { + RxConfig, TxConfig, IntrEnable, ConfigA, ConfigB, ConfigC, ConfigD, + 0 +}; +#endif + +/* Bits in the interrupt status/mask registers. */ +enum intr_status_bits { + IntrRxDone=0x0001, IntrRxErr=0x0004, IntrRxEmpty=0x0020, + IntrTxDone=0x0002, IntrTxError=0x0008, IntrTxUnderrun=0x0210, + IntrPCIErr=0x0040, + IntrStatsMax=0x0080, IntrRxEarly=0x0100, + IntrRxOverflow=0x0400, IntrRxDropped=0x0800, IntrRxNoBuf=0x1000, + IntrTxAborted=0x2000, IntrLinkChange=0x4000, + IntrRxWakeUp=0x8000, + IntrNormalSummary=0x0003, IntrAbnormalSummary=0xC260, + IntrTxDescRace=0x080000, /* mapped from IntrStatus2 */ + IntrTxErrSummary=0x082218, +}; + +/* Bits in WOLcrSet/WOLcrClr and PwrcsrSet/PwrcsrClr */ +enum wol_bits { + WOLucast = 0x10, + WOLmagic = 0x20, + WOLbmcast = 0x30, + WOLlnkon = 0x40, + WOLlnkoff = 0x80, +}; + +/* The Rx and Tx buffer descriptors. */ +struct rx_desc { + s32 rx_status; + u32 desc_length; /* Chain flag, Buffer/frame length */ + u32 addr; + u32 next_desc; +}; +struct tx_desc { + s32 tx_status; + u32 desc_length; /* Chain flag, Tx Config, Frame length */ + u32 addr; + u32 next_desc; +}; + +/* Initial value for tx_desc.desc_length, Buffer size goes to bits 0-10 */ +#define TXDESC 0x00e08000 + +enum rx_status_bits { + RxOK=0x8000, RxWholePkt=0x0300, RxErr=0x008F +}; + +/* Bits in *_desc.*_status */ +enum desc_status_bits { + DescOwn=0x80000000 +}; + +/* Bits in ChipCmd. */ +enum chip_cmd_bits { + CmdInit=0x01, CmdStart=0x02, CmdStop=0x04, CmdRxOn=0x08, + CmdTxOn=0x10, Cmd1TxDemand=0x20, CmdRxDemand=0x40, + Cmd1EarlyRx=0x01, Cmd1EarlyTx=0x02, Cmd1FDuplex=0x04, + Cmd1NoTxPoll=0x08, Cmd1Reset=0x80, +}; + +struct rhine_private { + /* Descriptor rings */ + struct rx_desc *rx_ring; + struct tx_desc *tx_ring; + dma_addr_t rx_ring_dma; + dma_addr_t tx_ring_dma; + + /* The addresses of receive-in-place skbuffs. */ + struct sk_buff *rx_skbuff[RX_RING_SIZE]; + dma_addr_t rx_skbuff_dma[RX_RING_SIZE]; + + /* The saved address of a sent-in-place packet/buffer, for later free(). */ + struct sk_buff *tx_skbuff[TX_RING_SIZE]; + dma_addr_t tx_skbuff_dma[TX_RING_SIZE]; + + /* Tx bounce buffers */ + unsigned char *tx_buf[TX_RING_SIZE]; + unsigned char *tx_bufs; + dma_addr_t tx_bufs_dma; + + struct pci_dev *pdev; + long pioaddr; + struct net_device_stats stats; + spinlock_t lock; + + /* Frequently used values: keep some adjacent for cache effect. */ + u32 quirks; + struct rx_desc *rx_head_desc; + unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */ + unsigned int cur_tx, dirty_tx; + unsigned int rx_buf_sz; /* Based on MTU+slack. */ + u8 wolopts; + + u8 tx_thresh, rx_thresh; + + struct mii_if_info mii_if; + void __iomem *base; +}; + +static int mdio_read(struct net_device *dev, int phy_id, int location); +static void mdio_write(struct net_device *dev, int phy_id, int location, int value); +static int rhine_open(struct net_device *dev); +static void rhine_tx_timeout(struct net_device *dev); +static int rhine_start_tx(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t rhine_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +static void rhine_tx(struct net_device *dev); +static void rhine_rx(struct net_device *dev); +static void rhine_error(struct net_device *dev, int intr_status); +static void rhine_set_rx_mode(struct net_device *dev); +static struct net_device_stats *rhine_get_stats(struct net_device *dev); +static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +static struct ethtool_ops netdev_ethtool_ops; +static int rhine_close(struct net_device *dev); +static void rhine_shutdown (struct device *gdev); + +#define RHINE_WAIT_FOR(condition) do { \ + int i=1024; \ + while (!(condition) && --i) \ + ; \ + if (debug > 1 && i < 512) \ + printk(KERN_INFO "%s: %4d cycles used @ %s:%d\n", \ + DRV_NAME, 1024-i, __func__, __LINE__); \ +} while(0) + +static inline u32 get_intr_status(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + u32 intr_status; + + intr_status = ioread16(ioaddr + IntrStatus); + /* On Rhine-II, Bit 3 indicates Tx descriptor write-back race. */ + if (rp->quirks & rqStatusWBRace) + intr_status |= ioread8(ioaddr + IntrStatus2) << 16; + return intr_status; +} + +/* + * Get power related registers into sane state. + * Notify user about past WOL event. + */ +static void rhine_power_init(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + u16 wolstat; + + if (rp->quirks & rqWOL) { + /* Make sure chip is in power state D0 */ + iowrite8(ioread8(ioaddr + StickyHW) & 0xFC, ioaddr + StickyHW); + + /* Disable "force PME-enable" */ + iowrite8(0x80, ioaddr + WOLcgClr); + + /* Clear power-event config bits (WOL) */ + iowrite8(0xFF, ioaddr + WOLcrClr); + /* More recent cards can manage two additional patterns */ + if (rp->quirks & rq6patterns) + iowrite8(0x03, ioaddr + WOLcrClr1); + + /* Save power-event status bits */ + wolstat = ioread8(ioaddr + PwrcsrSet); + if (rp->quirks & rq6patterns) + wolstat |= (ioread8(ioaddr + PwrcsrSet1) & 0x03) << 8; + + /* Clear power-event status bits */ + iowrite8(0xFF, ioaddr + PwrcsrClr); + if (rp->quirks & rq6patterns) + iowrite8(0x03, ioaddr + PwrcsrClr1); + + if (wolstat) { + char *reason; + switch (wolstat) { + case WOLmagic: + reason = "Magic packet"; + break; + case WOLlnkon: + reason = "Link went up"; + break; + case WOLlnkoff: + reason = "Link went down"; + break; + case WOLucast: + reason = "Unicast packet"; + break; + case WOLbmcast: + reason = "Multicast/broadcast packet"; + break; + default: + reason = "Unknown"; + } + printk(KERN_INFO "%s: Woke system up. Reason: %s.\n", + DRV_NAME, reason); + } + } +} + +static void rhine_chip_reset(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + iowrite8(Cmd1Reset, ioaddr + ChipCmd1); + IOSYNC; + + if (ioread8(ioaddr + ChipCmd1) & Cmd1Reset) { + printk(KERN_INFO "%s: Reset not complete yet. " + "Trying harder.\n", DRV_NAME); + + /* Force reset */ + if (rp->quirks & rqForceReset) + iowrite8(0x40, ioaddr + MiscCmd); + + /* Reset can take somewhat longer (rare) */ + RHINE_WAIT_FOR(!(ioread8(ioaddr + ChipCmd1) & Cmd1Reset)); + } + + if (debug > 1) + printk(KERN_INFO "%s: Reset %s.\n", dev->name, + (ioread8(ioaddr + ChipCmd1) & Cmd1Reset) ? + "failed" : "succeeded"); +} + +#ifdef USE_MMIO +static void enable_mmio(long pioaddr, u32 quirks) +{ + int n; + if (quirks & rqRhineI) { + /* More recent docs say that this bit is reserved ... */ + n = inb(pioaddr + ConfigA) | 0x20; + outb(n, pioaddr + ConfigA); + } else { + n = inb(pioaddr + ConfigD) | 0x80; + outb(n, pioaddr + ConfigD); + } +} +#endif + +/* + * Loads bytes 0x00-0x05, 0x6E-0x6F, 0x78-0x7B from EEPROM + * (plus 0x6C for Rhine-I/II) + */ +static void __devinit rhine_reload_eeprom(long pioaddr, struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + outb(0x20, pioaddr + MACRegEEcsr); + RHINE_WAIT_FOR(!(inb(pioaddr + MACRegEEcsr) & 0x20)); + +#ifdef USE_MMIO + /* + * Reloading from EEPROM overwrites ConfigA-D, so we must re-enable + * MMIO. If reloading EEPROM was done first this could be avoided, but + * it is not known if that still works with the "win98-reboot" problem. + */ + enable_mmio(pioaddr, rp->quirks); +#endif + + /* Turn off EEPROM-controlled wake-up (magic packet) */ + if (rp->quirks & rqWOL) + iowrite8(ioread8(ioaddr + ConfigA) & 0xFC, ioaddr + ConfigA); + +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void rhine_poll(struct net_device *dev) +{ + disable_irq(dev->irq); + rhine_interrupt(dev->irq, (void *)dev, NULL); + enable_irq(dev->irq); +} +#endif + +static void rhine_hw_init(struct net_device *dev, long pioaddr) +{ + struct rhine_private *rp = netdev_priv(dev); + + /* Reset the chip to erase previous misconfiguration. */ + rhine_chip_reset(dev); + + /* Rhine-I needs extra time to recuperate before EEPROM reload */ + if (rp->quirks & rqRhineI) + msleep(5); + + /* Reload EEPROM controlled bytes cleared by soft reset */ + rhine_reload_eeprom(pioaddr, dev); +} + +static int __devinit rhine_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct net_device *dev; + struct rhine_private *rp; + int i, rc; + u8 pci_rev; + u32 quirks; + long pioaddr; + long memaddr; + void __iomem *ioaddr; + int io_size, phy_id; + const char *name; +#ifdef USE_MMIO + int bar = 1; +#else + int bar = 0; +#endif + +/* when built into the kernel, we only print version if device is found */ +#ifndef MODULE + static int printed_version; + if (!printed_version++) + printk(version); +#endif + + pci_read_config_byte(pdev, PCI_REVISION_ID, &pci_rev); + + io_size = 256; + phy_id = 0; + quirks = 0; + name = "Rhine"; + if (pci_rev < VTunknown0) { + quirks = rqRhineI; + io_size = 128; + } + else if (pci_rev >= VT6102) { + quirks = rqWOL | rqForceReset; + if (pci_rev < VT6105) { + name = "Rhine II"; + quirks |= rqStatusWBRace; /* Rhine-II exclusive */ + } + else { + phy_id = 1; /* Integrated PHY, phy_id fixed to 1 */ + if (pci_rev >= VT6105_B0) + quirks |= rq6patterns; + if (pci_rev < VT6105M) + name = "Rhine III"; + else + name = "Rhine III (Management Adapter)"; + } + } + + rc = pci_enable_device(pdev); + if (rc) + goto err_out; + + /* this should always be supported */ + rc = pci_set_dma_mask(pdev, 0xffffffff); + if (rc) { + printk(KERN_ERR "32-bit PCI DMA addresses not supported by " + "the card!?\n"); + goto err_out; + } + + /* sanity check */ + if ((pci_resource_len(pdev, 0) < io_size) || + (pci_resource_len(pdev, 1) < io_size)) { + rc = -EIO; + printk(KERN_ERR "Insufficient PCI resources, aborting\n"); + goto err_out; + } + + pioaddr = pci_resource_start(pdev, 0); + memaddr = pci_resource_start(pdev, 1); + + pci_set_master(pdev); + + dev = alloc_etherdev(sizeof(struct rhine_private)); + if (!dev) { + rc = -ENOMEM; + printk(KERN_ERR "alloc_etherdev failed\n"); + goto err_out; + } + SET_MODULE_OWNER(dev); + SET_NETDEV_DEV(dev, &pdev->dev); + + rp = netdev_priv(dev); + rp->quirks = quirks; + rp->pioaddr = pioaddr; + rp->pdev = pdev; + + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) + goto err_out_free_netdev; + + ioaddr = pci_iomap(pdev, bar, io_size); + if (!ioaddr) { + rc = -EIO; + printk(KERN_ERR "ioremap failed for device %s, region 0x%X " + "@ 0x%lX\n", pci_name(pdev), io_size, memaddr); + goto err_out_free_res; + } + +#ifdef USE_MMIO + enable_mmio(pioaddr, quirks); + + /* Check that selected MMIO registers match the PIO ones */ + i = 0; + while (mmio_verify_registers[i]) { + int reg = mmio_verify_registers[i++]; + unsigned char a = inb(pioaddr+reg); + unsigned char b = readb(ioaddr+reg); + if (a != b) { + rc = -EIO; + printk(KERN_ERR "MMIO do not match PIO [%02x] " + "(%02x != %02x)\n", reg, a, b); + goto err_out_unmap; + } + } +#endif /* USE_MMIO */ + + dev->base_addr = (unsigned long)ioaddr; + rp->base = ioaddr; + + /* Get chip registers into a sane state */ + rhine_power_init(dev); + rhine_hw_init(dev, pioaddr); + + for (i = 0; i < 6; i++) + dev->dev_addr[i] = ioread8(ioaddr + StationAddr + i); + + if (!is_valid_ether_addr(dev->dev_addr)) { + rc = -EIO; + printk(KERN_ERR "Invalid MAC address\n"); + goto err_out_unmap; + } + + /* For Rhine-I/II, phy_id is loaded from EEPROM */ + if (!phy_id) + phy_id = ioread8(ioaddr + 0x6C); + + dev->irq = pdev->irq; + + spin_lock_init(&rp->lock); + rp->mii_if.dev = dev; + rp->mii_if.mdio_read = mdio_read; + rp->mii_if.mdio_write = mdio_write; + rp->mii_if.phy_id_mask = 0x1f; + rp->mii_if.reg_num_mask = 0x1f; + + /* The chip-specific entries in the device structure. */ + dev->open = rhine_open; + dev->hard_start_xmit = rhine_start_tx; + dev->stop = rhine_close; + dev->get_stats = rhine_get_stats; + dev->set_multicast_list = rhine_set_rx_mode; + dev->do_ioctl = netdev_ioctl; + dev->ethtool_ops = &netdev_ethtool_ops; + dev->tx_timeout = rhine_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = rhine_poll; +#endif + if (rp->quirks & rqRhineI) + dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM; + + /* dev->name not defined before register_netdev()! */ + rc = register_netdev(dev); + if (rc) + goto err_out_unmap; + + printk(KERN_INFO "%s: VIA %s at 0x%lx, ", + dev->name, name, +#ifdef USE_MMIO + memaddr +#else + (long)ioaddr +#endif + ); + + for (i = 0; i < 5; i++) + printk("%2.2x:", dev->dev_addr[i]); + printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], pdev->irq); + + pci_set_drvdata(pdev, dev); + + { + u16 mii_cmd; + int mii_status = mdio_read(dev, phy_id, 1); + mii_cmd = mdio_read(dev, phy_id, MII_BMCR) & ~BMCR_ISOLATE; + mdio_write(dev, phy_id, MII_BMCR, mii_cmd); + if (mii_status != 0xffff && mii_status != 0x0000) { + rp->mii_if.advertising = mdio_read(dev, phy_id, 4); + printk(KERN_INFO "%s: MII PHY found at address " + "%d, status 0x%4.4x advertising %4.4x " + "Link %4.4x.\n", dev->name, phy_id, + mii_status, rp->mii_if.advertising, + mdio_read(dev, phy_id, 5)); + + /* set IFF_RUNNING */ + if (mii_status & BMSR_LSTATUS) + netif_carrier_on(dev); + else + netif_carrier_off(dev); + + } + } + rp->mii_if.phy_id = phy_id; + + return 0; + +err_out_unmap: + pci_iounmap(pdev, ioaddr); +err_out_free_res: + pci_release_regions(pdev); +err_out_free_netdev: + free_netdev(dev); +err_out: + return rc; +} + +static int alloc_ring(struct net_device* dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void *ring; + dma_addr_t ring_dma; + + ring = pci_alloc_consistent(rp->pdev, + RX_RING_SIZE * sizeof(struct rx_desc) + + TX_RING_SIZE * sizeof(struct tx_desc), + &ring_dma); + if (!ring) { + printk(KERN_ERR "Could not allocate DMA memory.\n"); + return -ENOMEM; + } + if (rp->quirks & rqRhineI) { + rp->tx_bufs = pci_alloc_consistent(rp->pdev, + PKT_BUF_SZ * TX_RING_SIZE, + &rp->tx_bufs_dma); + if (rp->tx_bufs == NULL) { + pci_free_consistent(rp->pdev, + RX_RING_SIZE * sizeof(struct rx_desc) + + TX_RING_SIZE * sizeof(struct tx_desc), + ring, ring_dma); + return -ENOMEM; + } + } + + rp->rx_ring = ring; + rp->tx_ring = ring + RX_RING_SIZE * sizeof(struct rx_desc); + rp->rx_ring_dma = ring_dma; + rp->tx_ring_dma = ring_dma + RX_RING_SIZE * sizeof(struct rx_desc); + + return 0; +} + +static void free_ring(struct net_device* dev) +{ + struct rhine_private *rp = netdev_priv(dev); + + pci_free_consistent(rp->pdev, + RX_RING_SIZE * sizeof(struct rx_desc) + + TX_RING_SIZE * sizeof(struct tx_desc), + rp->rx_ring, rp->rx_ring_dma); + rp->tx_ring = NULL; + + if (rp->tx_bufs) + pci_free_consistent(rp->pdev, PKT_BUF_SZ * TX_RING_SIZE, + rp->tx_bufs, rp->tx_bufs_dma); + + rp->tx_bufs = NULL; + +} + +static void alloc_rbufs(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + dma_addr_t next; + int i; + + rp->dirty_rx = rp->cur_rx = 0; + + rp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32); + rp->rx_head_desc = &rp->rx_ring[0]; + next = rp->rx_ring_dma; + + /* Init the ring entries */ + for (i = 0; i < RX_RING_SIZE; i++) { + rp->rx_ring[i].rx_status = 0; + rp->rx_ring[i].desc_length = cpu_to_le32(rp->rx_buf_sz); + next += sizeof(struct rx_desc); + rp->rx_ring[i].next_desc = cpu_to_le32(next); + rp->rx_skbuff[i] = NULL; + } + /* Mark the last entry as wrapping the ring. */ + rp->rx_ring[i-1].next_desc = cpu_to_le32(rp->rx_ring_dma); + + /* Fill in the Rx buffers. Handle allocation failure gracefully. */ + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz); + rp->rx_skbuff[i] = skb; + if (skb == NULL) + break; + skb->dev = dev; /* Mark as being used by this device. */ + + rp->rx_skbuff_dma[i] = + pci_map_single(rp->pdev, skb->tail, rp->rx_buf_sz, + PCI_DMA_FROMDEVICE); + + rp->rx_ring[i].addr = cpu_to_le32(rp->rx_skbuff_dma[i]); + rp->rx_ring[i].rx_status = cpu_to_le32(DescOwn); + } + rp->dirty_rx = (unsigned int)(i - RX_RING_SIZE); +} + +static void free_rbufs(struct net_device* dev) +{ + struct rhine_private *rp = netdev_priv(dev); + int i; + + /* Free all the skbuffs in the Rx queue. */ + for (i = 0; i < RX_RING_SIZE; i++) { + rp->rx_ring[i].rx_status = 0; + rp->rx_ring[i].addr = cpu_to_le32(0xBADF00D0); /* An invalid address. */ + if (rp->rx_skbuff[i]) { + pci_unmap_single(rp->pdev, + rp->rx_skbuff_dma[i], + rp->rx_buf_sz, PCI_DMA_FROMDEVICE); + dev_kfree_skb(rp->rx_skbuff[i]); + } + rp->rx_skbuff[i] = NULL; + } +} + +static void alloc_tbufs(struct net_device* dev) +{ + struct rhine_private *rp = netdev_priv(dev); + dma_addr_t next; + int i; + + rp->dirty_tx = rp->cur_tx = 0; + next = rp->tx_ring_dma; + for (i = 0; i < TX_RING_SIZE; i++) { + rp->tx_skbuff[i] = NULL; + rp->tx_ring[i].tx_status = 0; + rp->tx_ring[i].desc_length = cpu_to_le32(TXDESC); + next += sizeof(struct tx_desc); + rp->tx_ring[i].next_desc = cpu_to_le32(next); + rp->tx_buf[i] = &rp->tx_bufs[i * PKT_BUF_SZ]; + } + rp->tx_ring[i-1].next_desc = cpu_to_le32(rp->tx_ring_dma); + +} + +static void free_tbufs(struct net_device* dev) +{ + struct rhine_private *rp = netdev_priv(dev); + int i; + + for (i = 0; i < TX_RING_SIZE; i++) { + rp->tx_ring[i].tx_status = 0; + rp->tx_ring[i].desc_length = cpu_to_le32(TXDESC); + rp->tx_ring[i].addr = cpu_to_le32(0xBADF00D0); /* An invalid address. */ + if (rp->tx_skbuff[i]) { + if (rp->tx_skbuff_dma[i]) { + pci_unmap_single(rp->pdev, + rp->tx_skbuff_dma[i], + rp->tx_skbuff[i]->len, + PCI_DMA_TODEVICE); + } + dev_kfree_skb(rp->tx_skbuff[i]); + } + rp->tx_skbuff[i] = NULL; + rp->tx_buf[i] = NULL; + } +} + +static void rhine_check_media(struct net_device *dev, unsigned int init_media) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + mii_check_media(&rp->mii_if, debug, init_media); + + if (rp->mii_if.full_duplex) + iowrite8(ioread8(ioaddr + ChipCmd1) | Cmd1FDuplex, + ioaddr + ChipCmd1); + else + iowrite8(ioread8(ioaddr + ChipCmd1) & ~Cmd1FDuplex, + ioaddr + ChipCmd1); +} + +static void init_registers(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + int i; + + for (i = 0; i < 6; i++) + iowrite8(dev->dev_addr[i], ioaddr + StationAddr + i); + + /* Initialize other registers. */ + iowrite16(0x0006, ioaddr + PCIBusConfig); /* Tune configuration??? */ + /* Configure initial FIFO thresholds. */ + iowrite8(0x20, ioaddr + TxConfig); + rp->tx_thresh = 0x20; + rp->rx_thresh = 0x60; /* Written in rhine_set_rx_mode(). */ + + iowrite32(rp->rx_ring_dma, ioaddr + RxRingPtr); + iowrite32(rp->tx_ring_dma, ioaddr + TxRingPtr); + + rhine_set_rx_mode(dev); + + /* Enable interrupts by setting the interrupt mask. */ + iowrite16(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow | + IntrRxDropped | IntrRxNoBuf | IntrTxAborted | + IntrTxDone | IntrTxError | IntrTxUnderrun | + IntrPCIErr | IntrStatsMax | IntrLinkChange, + ioaddr + IntrEnable); + + iowrite16(CmdStart | CmdTxOn | CmdRxOn | (Cmd1NoTxPoll << 8), + ioaddr + ChipCmd); + rhine_check_media(dev, 1); +} + +/* Enable MII link status auto-polling (required for IntrLinkChange) */ +static void rhine_enable_linkmon(void __iomem *ioaddr) +{ + iowrite8(0, ioaddr + MIICmd); + iowrite8(MII_BMSR, ioaddr + MIIRegAddr); + iowrite8(0x80, ioaddr + MIICmd); + + RHINE_WAIT_FOR((ioread8(ioaddr + MIIRegAddr) & 0x20)); + + iowrite8(MII_BMSR | 0x40, ioaddr + MIIRegAddr); +} + +/* Disable MII link status auto-polling (required for MDIO access) */ +static void rhine_disable_linkmon(void __iomem *ioaddr, u32 quirks) +{ + iowrite8(0, ioaddr + MIICmd); + + if (quirks & rqRhineI) { + iowrite8(0x01, ioaddr + MIIRegAddr); // MII_BMSR + + /* Can be called from ISR. Evil. */ + mdelay(1); + + /* 0x80 must be set immediately before turning it off */ + iowrite8(0x80, ioaddr + MIICmd); + + RHINE_WAIT_FOR(ioread8(ioaddr + MIIRegAddr) & 0x20); + + /* Heh. Now clear 0x80 again. */ + iowrite8(0, ioaddr + MIICmd); + } + else + RHINE_WAIT_FOR(ioread8(ioaddr + MIIRegAddr) & 0x80); +} + +/* Read and write over the MII Management Data I/O (MDIO) interface. */ + +static int mdio_read(struct net_device *dev, int phy_id, int regnum) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + int result; + + rhine_disable_linkmon(ioaddr, rp->quirks); + + /* rhine_disable_linkmon already cleared MIICmd */ + iowrite8(phy_id, ioaddr + MIIPhyAddr); + iowrite8(regnum, ioaddr + MIIRegAddr); + iowrite8(0x40, ioaddr + MIICmd); /* Trigger read */ + RHINE_WAIT_FOR(!(ioread8(ioaddr + MIICmd) & 0x40)); + result = ioread16(ioaddr + MIIData); + + rhine_enable_linkmon(ioaddr); + return result; +} + +static void mdio_write(struct net_device *dev, int phy_id, int regnum, int value) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + rhine_disable_linkmon(ioaddr, rp->quirks); + + /* rhine_disable_linkmon already cleared MIICmd */ + iowrite8(phy_id, ioaddr + MIIPhyAddr); + iowrite8(regnum, ioaddr + MIIRegAddr); + iowrite16(value, ioaddr + MIIData); + iowrite8(0x20, ioaddr + MIICmd); /* Trigger write */ + RHINE_WAIT_FOR(!(ioread8(ioaddr + MIICmd) & 0x20)); + + rhine_enable_linkmon(ioaddr); +} + +static int rhine_open(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + int rc; + + rc = request_irq(rp->pdev->irq, &rhine_interrupt, SA_SHIRQ, dev->name, + dev); + if (rc) + return rc; + + if (debug > 1) + printk(KERN_DEBUG "%s: rhine_open() irq %d.\n", + dev->name, rp->pdev->irq); + + rc = alloc_ring(dev); + if (rc) { + free_irq(rp->pdev->irq, dev); + return rc; + } + alloc_rbufs(dev); + alloc_tbufs(dev); + rhine_chip_reset(dev); + init_registers(dev); + if (debug > 2) + printk(KERN_DEBUG "%s: Done rhine_open(), status %4.4x " + "MII status: %4.4x.\n", + dev->name, ioread16(ioaddr + ChipCmd), + mdio_read(dev, rp->mii_if.phy_id, MII_BMSR)); + + netif_start_queue(dev); + + return 0; +} + +static void rhine_tx_timeout(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + printk(KERN_WARNING "%s: Transmit timed out, status %4.4x, PHY status " + "%4.4x, resetting...\n", + dev->name, ioread16(ioaddr + IntrStatus), + mdio_read(dev, rp->mii_if.phy_id, MII_BMSR)); + + /* protect against concurrent rx interrupts */ + disable_irq(rp->pdev->irq); + + spin_lock(&rp->lock); + + /* clear all descriptors */ + free_tbufs(dev); + free_rbufs(dev); + alloc_tbufs(dev); + alloc_rbufs(dev); + + /* Reinitialize the hardware. */ + rhine_chip_reset(dev); + init_registers(dev); + + spin_unlock(&rp->lock); + enable_irq(rp->pdev->irq); + + dev->trans_start = jiffies; + rp->stats.tx_errors++; + netif_wake_queue(dev); +} + +static int rhine_start_tx(struct sk_buff *skb, struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + unsigned entry; + + /* Caution: the write order is important here, set the field + with the "ownership" bits last. */ + + /* Calculate the next Tx descriptor entry. */ + entry = rp->cur_tx % TX_RING_SIZE; + + if (skb->len < ETH_ZLEN) { + skb = skb_padto(skb, ETH_ZLEN); + if (skb == NULL) + return 0; + } + + rp->tx_skbuff[entry] = skb; + + if ((rp->quirks & rqRhineI) && + (((unsigned long)skb->data & 3) || skb_shinfo(skb)->nr_frags != 0 || skb->ip_summed == CHECKSUM_HW)) { + /* Must use alignment buffer. */ + if (skb->len > PKT_BUF_SZ) { + /* packet too long, drop it */ + dev_kfree_skb(skb); + rp->tx_skbuff[entry] = NULL; + rp->stats.tx_dropped++; + return 0; + } + skb_copy_and_csum_dev(skb, rp->tx_buf[entry]); + rp->tx_skbuff_dma[entry] = 0; + rp->tx_ring[entry].addr = cpu_to_le32(rp->tx_bufs_dma + + (rp->tx_buf[entry] - + rp->tx_bufs)); + } else { + rp->tx_skbuff_dma[entry] = + pci_map_single(rp->pdev, skb->data, skb->len, + PCI_DMA_TODEVICE); + rp->tx_ring[entry].addr = cpu_to_le32(rp->tx_skbuff_dma[entry]); + } + + rp->tx_ring[entry].desc_length = + cpu_to_le32(TXDESC | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN)); + + /* lock eth irq */ + spin_lock_irq(&rp->lock); + wmb(); + rp->tx_ring[entry].tx_status = cpu_to_le32(DescOwn); + wmb(); + + rp->cur_tx++; + + /* Non-x86 Todo: explicitly flush cache lines here. */ + + /* Wake the potentially-idle transmit channel */ + iowrite8(ioread8(ioaddr + ChipCmd1) | Cmd1TxDemand, + ioaddr + ChipCmd1); + IOSYNC; + + if (rp->cur_tx == rp->dirty_tx + TX_QUEUE_LEN) + netif_stop_queue(dev); + + dev->trans_start = jiffies; + + spin_unlock_irq(&rp->lock); + + if (debug > 4) { + printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n", + dev->name, rp->cur_tx-1, entry); + } + return 0; +} + +/* The interrupt handler does all of the Rx thread work and cleans up + after the Tx thread. */ +static irqreturn_t rhine_interrupt(int irq, void *dev_instance, struct pt_regs *rgs) +{ + struct net_device *dev = dev_instance; + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + u32 intr_status; + int boguscnt = max_interrupt_work; + int handled = 0; + + while ((intr_status = get_intr_status(dev))) { + handled = 1; + + /* Acknowledge all of the current interrupt sources ASAP. */ + if (intr_status & IntrTxDescRace) + iowrite8(0x08, ioaddr + IntrStatus2); + iowrite16(intr_status & 0xffff, ioaddr + IntrStatus); + IOSYNC; + + if (debug > 4) + printk(KERN_DEBUG "%s: Interrupt, status %8.8x.\n", + dev->name, intr_status); + + if (intr_status & (IntrRxDone | IntrRxErr | IntrRxDropped | + IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf)) + rhine_rx(dev); + + if (intr_status & (IntrTxErrSummary | IntrTxDone)) { + if (intr_status & IntrTxErrSummary) { + /* Avoid scavenging before Tx engine turned off */ + RHINE_WAIT_FOR(!(ioread8(ioaddr+ChipCmd) & CmdTxOn)); + if (debug > 2 && + ioread8(ioaddr+ChipCmd) & CmdTxOn) + printk(KERN_WARNING "%s: " + "rhine_interrupt() Tx engine" + "still on.\n", dev->name); + } + rhine_tx(dev); + } + + /* Abnormal error summary/uncommon events handlers. */ + if (intr_status & (IntrPCIErr | IntrLinkChange | + IntrStatsMax | IntrTxError | IntrTxAborted | + IntrTxUnderrun | IntrTxDescRace)) + rhine_error(dev, intr_status); + + if (--boguscnt < 0) { + printk(KERN_WARNING "%s: Too much work at interrupt, " + "status=%#8.8x.\n", + dev->name, intr_status); + break; + } + } + + if (debug > 3) + printk(KERN_DEBUG "%s: exiting interrupt, status=%8.8x.\n", + dev->name, ioread16(ioaddr + IntrStatus)); + return IRQ_RETVAL(handled); +} + +/* This routine is logically part of the interrupt handler, but isolated + for clarity. */ +static void rhine_tx(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + int txstatus = 0, entry = rp->dirty_tx % TX_RING_SIZE; + + spin_lock(&rp->lock); + + /* find and cleanup dirty tx descriptors */ + while (rp->dirty_tx != rp->cur_tx) { + txstatus = le32_to_cpu(rp->tx_ring[entry].tx_status); + if (debug > 6) + printk(KERN_DEBUG " Tx scavenge %d status %8.8x.\n", + entry, txstatus); + if (txstatus & DescOwn) + break; + if (txstatus & 0x8000) { + if (debug > 1) + printk(KERN_DEBUG "%s: Transmit error, " + "Tx status %8.8x.\n", + dev->name, txstatus); + rp->stats.tx_errors++; + if (txstatus & 0x0400) rp->stats.tx_carrier_errors++; + if (txstatus & 0x0200) rp->stats.tx_window_errors++; + if (txstatus & 0x0100) rp->stats.tx_aborted_errors++; + if (txstatus & 0x0080) rp->stats.tx_heartbeat_errors++; + if (((rp->quirks & rqRhineI) && txstatus & 0x0002) || + (txstatus & 0x0800) || (txstatus & 0x1000)) { + rp->stats.tx_fifo_errors++; + rp->tx_ring[entry].tx_status = cpu_to_le32(DescOwn); + break; /* Keep the skb - we try again */ + } + /* Transmitter restarted in 'abnormal' handler. */ + } else { + if (rp->quirks & rqRhineI) + rp->stats.collisions += (txstatus >> 3) & 0x0F; + else + rp->stats.collisions += txstatus & 0x0F; + if (debug > 6) + printk(KERN_DEBUG "collisions: %1.1x:%1.1x\n", + (txstatus >> 3) & 0xF, + txstatus & 0xF); + rp->stats.tx_bytes += rp->tx_skbuff[entry]->len; + rp->stats.tx_packets++; + } + /* Free the original skb. */ + if (rp->tx_skbuff_dma[entry]) { + pci_unmap_single(rp->pdev, + rp->tx_skbuff_dma[entry], + rp->tx_skbuff[entry]->len, + PCI_DMA_TODEVICE); + } + dev_kfree_skb_irq(rp->tx_skbuff[entry]); + rp->tx_skbuff[entry] = NULL; + entry = (++rp->dirty_tx) % TX_RING_SIZE; + } + if ((rp->cur_tx - rp->dirty_tx) < TX_QUEUE_LEN - 4) + netif_wake_queue(dev); + + spin_unlock(&rp->lock); +} + +/* This routine is logically part of the interrupt handler, but isolated + for clarity and better register allocation. */ +static void rhine_rx(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + int entry = rp->cur_rx % RX_RING_SIZE; + int boguscnt = rp->dirty_rx + RX_RING_SIZE - rp->cur_rx; + + if (debug > 4) { + printk(KERN_DEBUG "%s: rhine_rx(), entry %d status %8.8x.\n", + dev->name, entry, + le32_to_cpu(rp->rx_head_desc->rx_status)); + } + + /* If EOP is set on the next entry, it's a new packet. Send it up. */ + while (!(rp->rx_head_desc->rx_status & cpu_to_le32(DescOwn))) { + struct rx_desc *desc = rp->rx_head_desc; + u32 desc_status = le32_to_cpu(desc->rx_status); + int data_size = desc_status >> 16; + + if (debug > 4) + printk(KERN_DEBUG " rhine_rx() status is %8.8x.\n", + desc_status); + if (--boguscnt < 0) + break; + if ((desc_status & (RxWholePkt | RxErr)) != RxWholePkt) { + if ((desc_status & RxWholePkt) != RxWholePkt) { + printk(KERN_WARNING "%s: Oversized Ethernet " + "frame spanned multiple buffers, entry " + "%#x length %d status %8.8x!\n", + dev->name, entry, data_size, + desc_status); + printk(KERN_WARNING "%s: Oversized Ethernet " + "frame %p vs %p.\n", dev->name, + rp->rx_head_desc, &rp->rx_ring[entry]); + rp->stats.rx_length_errors++; + } else if (desc_status & RxErr) { + /* There was a error. */ + if (debug > 2) + printk(KERN_DEBUG " rhine_rx() Rx " + "error was %8.8x.\n", + desc_status); + rp->stats.rx_errors++; + if (desc_status & 0x0030) rp->stats.rx_length_errors++; + if (desc_status & 0x0048) rp->stats.rx_fifo_errors++; + if (desc_status & 0x0004) rp->stats.rx_frame_errors++; + if (desc_status & 0x0002) { + /* this can also be updated outside the interrupt handler */ + spin_lock(&rp->lock); + rp->stats.rx_crc_errors++; + spin_unlock(&rp->lock); + } + } + } else { + struct sk_buff *skb; + /* Length should omit the CRC */ + int pkt_len = data_size - 4; + + /* 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 */ + pci_dma_sync_single_for_cpu(rp->pdev, + rp->rx_skbuff_dma[entry], + rp->rx_buf_sz, + PCI_DMA_FROMDEVICE); + + eth_copy_and_sum(skb, + rp->rx_skbuff[entry]->tail, + pkt_len, 0); + skb_put(skb, pkt_len); + pci_dma_sync_single_for_device(rp->pdev, + rp->rx_skbuff_dma[entry], + rp->rx_buf_sz, + PCI_DMA_FROMDEVICE); + } else { + skb = rp->rx_skbuff[entry]; + if (skb == NULL) { + printk(KERN_ERR "%s: Inconsistent Rx " + "descriptor chain.\n", + dev->name); + break; + } + rp->rx_skbuff[entry] = NULL; + skb_put(skb, pkt_len); + pci_unmap_single(rp->pdev, + rp->rx_skbuff_dma[entry], + rp->rx_buf_sz, + PCI_DMA_FROMDEVICE); + } + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->last_rx = jiffies; + rp->stats.rx_bytes += pkt_len; + rp->stats.rx_packets++; + } + entry = (++rp->cur_rx) % RX_RING_SIZE; + rp->rx_head_desc = &rp->rx_ring[entry]; + } + + /* Refill the Rx ring buffers. */ + for (; rp->cur_rx - rp->dirty_rx > 0; rp->dirty_rx++) { + struct sk_buff *skb; + entry = rp->dirty_rx % RX_RING_SIZE; + if (rp->rx_skbuff[entry] == NULL) { + skb = dev_alloc_skb(rp->rx_buf_sz); + rp->rx_skbuff[entry] = skb; + if (skb == NULL) + break; /* Better luck next round. */ + skb->dev = dev; /* Mark as being used by this device. */ + rp->rx_skbuff_dma[entry] = + pci_map_single(rp->pdev, skb->tail, + rp->rx_buf_sz, + PCI_DMA_FROMDEVICE); + rp->rx_ring[entry].addr = cpu_to_le32(rp->rx_skbuff_dma[entry]); + } + rp->rx_ring[entry].rx_status = cpu_to_le32(DescOwn); + } +} + +/* + * Clears the "tally counters" for CRC errors and missed frames(?). + * It has been reported that some chips need a write of 0 to clear + * these, for others the counters are set to 1 when written to and + * instead cleared when read. So we clear them both ways ... + */ +static inline void clear_tally_counters(void __iomem *ioaddr) +{ + iowrite32(0, ioaddr + RxMissed); + ioread16(ioaddr + RxCRCErrs); + ioread16(ioaddr + RxMissed); +} + +static void rhine_restart_tx(struct net_device *dev) { + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + int entry = rp->dirty_tx % TX_RING_SIZE; + u32 intr_status; + + /* + * If new errors occured, we need to sort them out before doing Tx. + * In that case the ISR will be back here RSN anyway. + */ + intr_status = get_intr_status(dev); + + if ((intr_status & IntrTxErrSummary) == 0) { + + /* We know better than the chip where it should continue. */ + iowrite32(rp->tx_ring_dma + entry * sizeof(struct tx_desc), + ioaddr + TxRingPtr); + + iowrite8(ioread8(ioaddr + ChipCmd) | CmdTxOn, + ioaddr + ChipCmd); + iowrite8(ioread8(ioaddr + ChipCmd1) | Cmd1TxDemand, + ioaddr + ChipCmd1); + IOSYNC; + } + else { + /* This should never happen */ + if (debug > 1) + printk(KERN_WARNING "%s: rhine_restart_tx() " + "Another error occured %8.8x.\n", + dev->name, intr_status); + } + +} + +static void rhine_error(struct net_device *dev, int intr_status) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + spin_lock(&rp->lock); + + if (intr_status & IntrLinkChange) + rhine_check_media(dev, 0); + if (intr_status & IntrStatsMax) { + rp->stats.rx_crc_errors += ioread16(ioaddr + RxCRCErrs); + rp->stats.rx_missed_errors += ioread16(ioaddr + RxMissed); + clear_tally_counters(ioaddr); + } + if (intr_status & IntrTxAborted) { + if (debug > 1) + printk(KERN_INFO "%s: Abort %8.8x, frame dropped.\n", + dev->name, intr_status); + } + if (intr_status & IntrTxUnderrun) { + if (rp->tx_thresh < 0xE0) + iowrite8(rp->tx_thresh += 0x20, ioaddr + TxConfig); + if (debug > 1) + printk(KERN_INFO "%s: Transmitter underrun, Tx " + "threshold now %2.2x.\n", + dev->name, rp->tx_thresh); + } + if (intr_status & IntrTxDescRace) { + if (debug > 2) + printk(KERN_INFO "%s: Tx descriptor write-back race.\n", + dev->name); + } + if ((intr_status & IntrTxError) && + (intr_status & (IntrTxAborted | + IntrTxUnderrun | IntrTxDescRace)) == 0) { + if (rp->tx_thresh < 0xE0) { + iowrite8(rp->tx_thresh += 0x20, ioaddr + TxConfig); + } + if (debug > 1) + printk(KERN_INFO "%s: Unspecified error. Tx " + "threshold now %2.2x.\n", + dev->name, rp->tx_thresh); + } + if (intr_status & (IntrTxAborted | IntrTxUnderrun | IntrTxDescRace | + IntrTxError)) + rhine_restart_tx(dev); + + if (intr_status & ~(IntrLinkChange | IntrStatsMax | IntrTxUnderrun | + IntrTxError | IntrTxAborted | IntrNormalSummary | + IntrTxDescRace)) { + if (debug > 1) + printk(KERN_ERR "%s: Something Wicked happened! " + "%8.8x.\n", dev->name, intr_status); + } + + spin_unlock(&rp->lock); +} + +static struct net_device_stats *rhine_get_stats(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + unsigned long flags; + + spin_lock_irqsave(&rp->lock, flags); + rp->stats.rx_crc_errors += ioread16(ioaddr + RxCRCErrs); + rp->stats.rx_missed_errors += ioread16(ioaddr + RxMissed); + clear_tally_counters(ioaddr); + spin_unlock_irqrestore(&rp->lock, flags); + + return &rp->stats; +} + +static void rhine_set_rx_mode(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + u32 mc_filter[2]; /* Multicast hash filter */ + u8 rx_mode; /* Note: 0x02=accept runt, 0x01=accept errs */ + + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + /* Unconditionally log net taps. */ + printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", + dev->name); + rx_mode = 0x1C; + iowrite32(0xffffffff, ioaddr + MulticastFilter0); + iowrite32(0xffffffff, ioaddr + MulticastFilter1); + } else if ((dev->mc_count > multicast_filter_limit) + || (dev->flags & IFF_ALLMULTI)) { + /* Too many to match, or accept all multicasts. */ + iowrite32(0xffffffff, ioaddr + MulticastFilter0); + iowrite32(0xffffffff, ioaddr + MulticastFilter1); + rx_mode = 0x0C; + } else { + struct dev_mc_list *mclist; + int i; + memset(mc_filter, 0, sizeof(mc_filter)); + for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; + i++, mclist = mclist->next) { + int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26; + + mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); + } + iowrite32(mc_filter[0], ioaddr + MulticastFilter0); + iowrite32(mc_filter[1], ioaddr + MulticastFilter1); + rx_mode = 0x0C; + } + iowrite8(rp->rx_thresh | rx_mode, ioaddr + RxConfig); +} + +static void netdev_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct rhine_private *rp = netdev_priv(dev); + + strcpy(info->driver, DRV_NAME); + strcpy(info->version, DRV_VERSION); + strcpy(info->bus_info, pci_name(rp->pdev)); +} + +static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct rhine_private *rp = netdev_priv(dev); + int rc; + + spin_lock_irq(&rp->lock); + rc = mii_ethtool_gset(&rp->mii_if, cmd); + spin_unlock_irq(&rp->lock); + + return rc; +} + +static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct rhine_private *rp = netdev_priv(dev); + int rc; + + spin_lock_irq(&rp->lock); + rc = mii_ethtool_sset(&rp->mii_if, cmd); + spin_unlock_irq(&rp->lock); + + return rc; +} + +static int netdev_nway_reset(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + + return mii_nway_restart(&rp->mii_if); +} + +static u32 netdev_get_link(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + + return mii_link_ok(&rp->mii_if); +} + +static u32 netdev_get_msglevel(struct net_device *dev) +{ + return debug; +} + +static void netdev_set_msglevel(struct net_device *dev, u32 value) +{ + debug = value; +} + +static void rhine_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) +{ + struct rhine_private *rp = netdev_priv(dev); + + if (!(rp->quirks & rqWOL)) + return; + + spin_lock_irq(&rp->lock); + wol->supported = WAKE_PHY | WAKE_MAGIC | + WAKE_UCAST | WAKE_MCAST | WAKE_BCAST; /* Untested */ + wol->wolopts = rp->wolopts; + spin_unlock_irq(&rp->lock); +} + +static int rhine_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) +{ + struct rhine_private *rp = netdev_priv(dev); + u32 support = WAKE_PHY | WAKE_MAGIC | + WAKE_UCAST | WAKE_MCAST | WAKE_BCAST; /* Untested */ + + if (!(rp->quirks & rqWOL)) + return -EINVAL; + + if (wol->wolopts & ~support) + return -EINVAL; + + spin_lock_irq(&rp->lock); + rp->wolopts = wol->wolopts; + spin_unlock_irq(&rp->lock); + + return 0; +} + +static struct ethtool_ops netdev_ethtool_ops = { + .get_drvinfo = netdev_get_drvinfo, + .get_settings = netdev_get_settings, + .set_settings = netdev_set_settings, + .nway_reset = netdev_nway_reset, + .get_link = netdev_get_link, + .get_msglevel = netdev_get_msglevel, + .set_msglevel = netdev_set_msglevel, + .get_wol = rhine_get_wol, + .set_wol = rhine_set_wol, + .get_sg = ethtool_op_get_sg, + .get_tx_csum = ethtool_op_get_tx_csum, +}; + +static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct rhine_private *rp = netdev_priv(dev); + int rc; + + if (!netif_running(dev)) + return -EINVAL; + + spin_lock_irq(&rp->lock); + rc = generic_mii_ioctl(&rp->mii_if, if_mii(rq), cmd, NULL); + spin_unlock_irq(&rp->lock); + + return rc; +} + +static int rhine_close(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + spin_lock_irq(&rp->lock); + + netif_stop_queue(dev); + + if (debug > 1) + printk(KERN_DEBUG "%s: Shutting down ethercard, " + "status was %4.4x.\n", + dev->name, ioread16(ioaddr + ChipCmd)); + + /* Switch to loopback mode to avoid hardware races. */ + iowrite8(rp->tx_thresh | 0x02, ioaddr + TxConfig); + + /* Disable interrupts by clearing the interrupt mask. */ + iowrite16(0x0000, ioaddr + IntrEnable); + + /* Stop the chip's Tx and Rx processes. */ + iowrite16(CmdStop, ioaddr + ChipCmd); + + spin_unlock_irq(&rp->lock); + + free_irq(rp->pdev->irq, dev); + free_rbufs(dev); + free_tbufs(dev); + free_ring(dev); + + return 0; +} + + +static void __devexit rhine_remove_one(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct rhine_private *rp = netdev_priv(dev); + + unregister_netdev(dev); + + pci_iounmap(pdev, rp->base); + pci_release_regions(pdev); + + free_netdev(dev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); +} + +static void rhine_shutdown (struct device *gendev) +{ + struct pci_dev *pdev = to_pci_dev(gendev); + struct net_device *dev = pci_get_drvdata(pdev); + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + if (!(rp->quirks & rqWOL)) + return; /* Nothing to do for non-WOL adapters */ + + rhine_power_init(dev); + + /* Make sure we use pattern 0, 1 and not 4, 5 */ + if (rp->quirks & rq6patterns) + iowrite8(0x04, ioaddr + 0xA7); + + if (rp->wolopts & WAKE_MAGIC) { + iowrite8(WOLmagic, ioaddr + WOLcrSet); + /* + * Turn EEPROM-controlled wake-up back on -- some hardware may + * not cooperate otherwise. + */ + iowrite8(ioread8(ioaddr + ConfigA) | 0x03, ioaddr + ConfigA); + } + + if (rp->wolopts & (WAKE_BCAST|WAKE_MCAST)) + iowrite8(WOLbmcast, ioaddr + WOLcgSet); + + if (rp->wolopts & WAKE_PHY) + iowrite8(WOLlnkon | WOLlnkoff, ioaddr + WOLcrSet); + + if (rp->wolopts & WAKE_UCAST) + iowrite8(WOLucast, ioaddr + WOLcrSet); + + if (rp->wolopts) { + /* Enable legacy WOL (for old motherboards) */ + iowrite8(0x01, ioaddr + PwcfgSet); + iowrite8(ioread8(ioaddr + StickyHW) | 0x04, ioaddr + StickyHW); + } + + /* Hit power state D3 (sleep) */ + iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW); + + /* TODO: Check use of pci_enable_wake() */ + +} + +#ifdef CONFIG_PM +static int rhine_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct rhine_private *rp = netdev_priv(dev); + unsigned long flags; + + if (!netif_running(dev)) + return 0; + + netif_device_detach(dev); + pci_save_state(pdev); + + spin_lock_irqsave(&rp->lock, flags); + rhine_shutdown(&pdev->dev); + spin_unlock_irqrestore(&rp->lock, flags); + + free_irq(dev->irq, dev); + return 0; +} + +static int rhine_resume(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct rhine_private *rp = netdev_priv(dev); + unsigned long flags; + int ret; + + if (!netif_running(dev)) + return 0; + + if (request_irq(dev->irq, rhine_interrupt, SA_SHIRQ, dev->name, dev)) + printk(KERN_ERR "via-rhine %s: request_irq failed\n", dev->name); + + ret = pci_set_power_state(pdev, PCI_D0); + if (debug > 1) + printk(KERN_INFO "%s: Entering power state D0 %s (%d).\n", + dev->name, ret ? "failed" : "succeeded", ret); + + pci_restore_state(pdev); + + spin_lock_irqsave(&rp->lock, flags); +#ifdef USE_MMIO + enable_mmio(rp->pioaddr, rp->quirks); +#endif + rhine_power_init(dev); + free_tbufs(dev); + free_rbufs(dev); + alloc_tbufs(dev); + alloc_rbufs(dev); + init_registers(dev); + spin_unlock_irqrestore(&rp->lock, flags); + + netif_device_attach(dev); + + return 0; +} +#endif /* CONFIG_PM */ + +static struct pci_driver rhine_driver = { + .name = DRV_NAME, + .id_table = rhine_pci_tbl, + .probe = rhine_init_one, + .remove = __devexit_p(rhine_remove_one), +#ifdef CONFIG_PM + .suspend = rhine_suspend, + .resume = rhine_resume, +#endif /* CONFIG_PM */ + .driver = { + .shutdown = rhine_shutdown, + } +}; + + +static int __init rhine_init(void) +{ +/* when a module, this is printed whether or not devices are found in probe */ +#ifdef MODULE + printk(version); +#endif + return pci_module_init(&rhine_driver); +} + + +static void __exit rhine_cleanup(void) +{ + pci_unregister_driver(&rhine_driver); +} + + +module_init(rhine_init); +module_exit(rhine_cleanup); |