diff options
Diffstat (limited to 'drivers/net/ethernet/via/via-rhine.c')
| -rw-r--r-- | drivers/net/ethernet/via/via-rhine.c | 2631 |
1 files changed, 2631 insertions, 0 deletions
diff --git a/drivers/net/ethernet/via/via-rhine.c b/drivers/net/ethernet/via/via-rhine.c new file mode 100644 index 000000000..0fb15a17b --- /dev/null +++ b/drivers/net/ethernet/via/via-rhine.c @@ -0,0 +1,2631 @@ +/* via-rhine.c: A Linux Ethernet device driver for VIA Rhine family chips. */ +/* + Written 1998-2001 by Donald Becker. + + Current Maintainer: Kevin Brace <kevinbrace@bracecomputerlab.com> + + 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 + [link no longer provides useful info -jgarzik] + +*/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#define DRV_NAME "via-rhine" + +#include <linux/types.h> + +/* A few user-configurable values. + These may be modified when a driver module is loaded. */ +static int debug = 0; +#define RHINE_MSG_DEFAULT \ + (0x0000) + +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1518 effectively disables this feature. */ +#if defined(__alpha__) || defined(__arm__) || defined(__hppa__) || \ + defined(CONFIG_SPARC) || defined(__ia64__) || \ + defined(__sh__) || defined(__mips__) +static int rx_copybreak = 1518; +#else +static int rx_copybreak; +#endif + +/* Work-around for broken BIOSes: they are unable to get the chip back out of + power state D3 so PXE booting fails. bootparam(7): via-rhine.avoid_D3=1 */ +static bool avoid_D3; + +/* + * 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. + * With BQL support, we can increase TX ring safely. + * There are no ill effects from too-large receive rings. + */ +#define TX_RING_SIZE 64 +#define TX_QUEUE_LEN (TX_RING_SIZE - 6) /* Limit ring entries actually used. */ +#define RX_RING_SIZE 64 + +/* 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/interrupt.h> +#include <linux/pci.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.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/if_vlan.h> +#include <linux/bitops.h> +#include <linux/workqueue.h> +#include <asm/processor.h> /* Processor type for cache alignment. */ +#include <asm/io.h> +#include <asm/irq.h> +#include <linux/uaccess.h> +#include <linux/dmi.h> + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("VIA Rhine PCI Fast Ethernet driver"); +MODULE_LICENSE("GPL"); + +module_param(debug, int, 0); +module_param(rx_copybreak, int, 0); +module_param(avoid_D3, bool, 0); +MODULE_PARM_DESC(debug, "VIA Rhine debug message flags"); +MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames"); +MODULE_PARM_DESC(avoid_D3, "Avoid power state D3 (work-around for broken BIOSes)"); + +#define MCAM_SIZE 32 +#define VCAM_SIZE 32 + +/* + 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 +netdev_priv(dev)->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 +netdev_priv(dev)->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 */ + VT8251 = 0x7C, /* Integrated MAC */ + 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 */ + rqIntPHY = 0x0200, /* Integrated PHY */ + rqMgmt = 0x0400, /* Management adapter */ + rqNeedEnMMIO = 0x0800, /* Whether the core needs to be + * switched from PIO mode to MMIO + * (only applies to PCI) + */ +}; +/* + * 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 const struct pci_device_id rhine_pci_tbl[] = { + { 0x1106, 0x3043, PCI_ANY_ID, PCI_ANY_ID, }, /* VT86C100A */ + { 0x1106, 0x3065, PCI_ANY_ID, PCI_ANY_ID, }, /* VT6102 */ + { 0x1106, 0x3106, PCI_ANY_ID, PCI_ANY_ID, }, /* 6105{,L,LOM} */ + { 0x1106, 0x3053, PCI_ANY_ID, PCI_ANY_ID, }, /* VT6105M */ + { } /* terminate list */ +}; +MODULE_DEVICE_TABLE(pci, rhine_pci_tbl); + +/* OpenFirmware identifiers for platform-bus devices + * The .data field is currently only used to store quirks + */ +static u32 vt8500_quirks = rqWOL | rqForceReset | rq6patterns; +static const struct of_device_id rhine_of_tbl[] = { + { .compatible = "via,vt8500-rhine", .data = &vt8500_quirks }, + { } /* terminate list */ +}; +MODULE_DEVICE_TABLE(of, rhine_of_tbl); + +/* Offsets to the device registers. */ +enum register_offsets { + StationAddr=0x00, RxConfig=0x06, TxConfig=0x07, ChipCmd=0x08, + ChipCmd1=0x09, TQWake=0x0A, + IntrStatus=0x0C, IntrEnable=0x0E, + MulticastFilter0=0x10, MulticastFilter1=0x14, + RxRingPtr=0x18, TxRingPtr=0x1C, GFIFOTest=0x54, + MIIPhyAddr=0x6C, MIIStatus=0x6D, PCIBusConfig=0x6E, PCIBusConfig1=0x6F, + 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, + CamMask=0x88, CamCon=0x92, CamAddr=0x93, + 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 +}; + +/* Bits in the TxConfig (TCR) register */ +enum tcr_bits { + TCR_PQEN=0x01, + TCR_LB0=0x02, /* loopback[0] */ + TCR_LB1=0x04, /* loopback[1] */ + TCR_OFSET=0x08, + TCR_RTGOPT=0x10, + TCR_RTFT0=0x20, + TCR_RTFT1=0x40, + TCR_RTSF=0x80, +}; + +/* Bits in the CamCon (CAMC) register */ +enum camcon_bits { + CAMC_CAMEN=0x01, + CAMC_VCAMSL=0x02, + CAMC_CAMWR=0x04, + CAMC_CAMRD=0x08, +}; + +/* Bits in the PCIBusConfig1 (BCR1) register */ +enum bcr1_bits { + BCR1_POT0=0x01, + BCR1_POT1=0x02, + BCR1_POT2=0x04, + BCR1_CTFT0=0x08, + BCR1_CTFT1=0x10, + BCR1_CTSF=0x20, + BCR1_TXQNOBK=0x40, /* for VT6105 */ + BCR1_VIDFR=0x80, /* for VT6105 */ + BCR1_MED0=0x40, /* for VT6102 */ + BCR1_MED1=0x80, /* for VT6102 */ +}; + +/* Registers we check that mmio and reg are the same. */ +static const int mmio_verify_registers[] = { + RxConfig, TxConfig, IntrEnable, ConfigA, ConfigB, ConfigC, ConfigD, + 0 +}; + +/* Bits in the interrupt status/mask registers. */ +enum intr_status_bits { + IntrRxDone = 0x0001, + IntrTxDone = 0x0002, + IntrRxErr = 0x0004, + IntrTxError = 0x0008, + IntrRxEmpty = 0x0020, + IntrPCIErr = 0x0040, + IntrStatsMax = 0x0080, + IntrRxEarly = 0x0100, + IntrTxUnderrun = 0x0210, + IntrRxOverflow = 0x0400, + IntrRxDropped = 0x0800, + IntrRxNoBuf = 0x1000, + IntrTxAborted = 0x2000, + IntrLinkChange = 0x4000, + IntrRxWakeUp = 0x8000, + IntrTxDescRace = 0x080000, /* mapped from IntrStatus2 */ + IntrNormalSummary = IntrRxDone | IntrTxDone, + IntrTxErrSummary = IntrTxDescRace | IntrTxAborted | IntrTxError | + IntrTxUnderrun, +}; + +/* 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 { + __le32 rx_status; + __le32 desc_length; /* Chain flag, Buffer/frame length */ + __le32 addr; + __le32 next_desc; +}; +struct tx_desc { + __le32 tx_status; + __le32 desc_length; /* Chain flag, Tx Config, Frame length */ + __le32 addr; + __le32 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 *_desc.*_length */ +enum desc_length_bits { + DescTag=0x00010000 +}; + +/* 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_stats { + u64 packets; + u64 bytes; + struct u64_stats_sync syncp; +}; + +struct rhine_private { + /* Bit mask for configured VLAN ids */ + unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)]; + + /* 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 (Rhine-I only) */ + unsigned char *tx_buf[TX_RING_SIZE]; + unsigned char *tx_bufs; + dma_addr_t tx_bufs_dma; + + int irq; + long pioaddr; + struct net_device *dev; + struct napi_struct napi; + spinlock_t lock; + struct mutex task_lock; + bool task_enable; + struct work_struct slow_event_task; + struct work_struct reset_task; + + u32 msg_enable; + + /* Frequently used values: keep some adjacent for cache effect. */ + u32 quirks; + unsigned int cur_rx; + unsigned int cur_tx, dirty_tx; + unsigned int rx_buf_sz; /* Based on MTU+slack. */ + struct rhine_stats rx_stats; + struct rhine_stats tx_stats; + u8 wolopts; + + u8 tx_thresh, rx_thresh; + + struct mii_if_info mii_if; + void __iomem *base; +}; + +#define BYTE_REG_BITS_ON(x, p) do { iowrite8((ioread8((p))|(x)), (p)); } while (0) +#define WORD_REG_BITS_ON(x, p) do { iowrite16((ioread16((p))|(x)), (p)); } while (0) +#define DWORD_REG_BITS_ON(x, p) do { iowrite32((ioread32((p))|(x)), (p)); } while (0) + +#define BYTE_REG_BITS_IS_ON(x, p) (ioread8((p)) & (x)) +#define WORD_REG_BITS_IS_ON(x, p) (ioread16((p)) & (x)) +#define DWORD_REG_BITS_IS_ON(x, p) (ioread32((p)) & (x)) + +#define BYTE_REG_BITS_OFF(x, p) do { iowrite8(ioread8((p)) & (~(x)), (p)); } while (0) +#define WORD_REG_BITS_OFF(x, p) do { iowrite16(ioread16((p)) & (~(x)), (p)); } while (0) +#define DWORD_REG_BITS_OFF(x, p) do { iowrite32(ioread32((p)) & (~(x)), (p)); } while (0) + +#define BYTE_REG_BITS_SET(x, m, p) do { iowrite8((ioread8((p)) & (~(m)))|(x), (p)); } while (0) +#define WORD_REG_BITS_SET(x, m, p) do { iowrite16((ioread16((p)) & (~(m)))|(x), (p)); } while (0) +#define DWORD_REG_BITS_SET(x, m, p) do { iowrite32((ioread32((p)) & (~(m)))|(x), (p)); } while (0) + + +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_reset_task(struct work_struct *work); +static void rhine_slow_event_task(struct work_struct *work); +static void rhine_tx_timeout(struct net_device *dev, unsigned int txqueue); +static netdev_tx_t rhine_start_tx(struct sk_buff *skb, + struct net_device *dev); +static irqreturn_t rhine_interrupt(int irq, void *dev_instance); +static void rhine_tx(struct net_device *dev); +static int rhine_rx(struct net_device *dev, int limit); +static void rhine_set_rx_mode(struct net_device *dev); +static void rhine_get_stats64(struct net_device *dev, + struct rtnl_link_stats64 *stats); +static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +static const struct ethtool_ops netdev_ethtool_ops; +static int rhine_close(struct net_device *dev); +static int rhine_vlan_rx_add_vid(struct net_device *dev, + __be16 proto, u16 vid); +static int rhine_vlan_rx_kill_vid(struct net_device *dev, + __be16 proto, u16 vid); +static void rhine_restart_tx(struct net_device *dev); + +static void rhine_wait_bit(struct rhine_private *rp, u8 reg, u8 mask, bool low) +{ + void __iomem *ioaddr = rp->base; + int i; + + for (i = 0; i < 1024; i++) { + bool has_mask_bits = !!(ioread8(ioaddr + reg) & mask); + + if (low ^ has_mask_bits) + break; + udelay(10); + } + if (i > 64) { + netif_dbg(rp, hw, rp->dev, "%s bit wait (%02x/%02x) cycle " + "count: %04d\n", low ? "low" : "high", reg, mask, i); + } +} + +static void rhine_wait_bit_high(struct rhine_private *rp, u8 reg, u8 mask) +{ + rhine_wait_bit(rp, reg, mask, false); +} + +static void rhine_wait_bit_low(struct rhine_private *rp, u8 reg, u8 mask) +{ + rhine_wait_bit(rp, reg, mask, true); +} + +static u32 rhine_get_events(struct rhine_private *rp) +{ + 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; +} + +static void rhine_ack_events(struct rhine_private *rp, u32 mask) +{ + void __iomem *ioaddr = rp->base; + + if (rp->quirks & rqStatusWBRace) + iowrite8(mask >> 16, ioaddr + IntrStatus2); + iowrite16(mask, ioaddr + IntrStatus); +} + +/* + * 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"; + } + netdev_info(dev, "Woke system up. Reason: %s\n", + reason); + } + } +} + +static void rhine_chip_reset(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + u8 cmd1; + + iowrite8(Cmd1Reset, ioaddr + ChipCmd1); + IOSYNC; + + if (ioread8(ioaddr + ChipCmd1) & Cmd1Reset) { + netdev_info(dev, "Reset not complete yet. Trying harder.\n"); + + /* Force reset */ + if (rp->quirks & rqForceReset) + iowrite8(0x40, ioaddr + MiscCmd); + + /* Reset can take somewhat longer (rare) */ + rhine_wait_bit_low(rp, ChipCmd1, Cmd1Reset); + } + + cmd1 = ioread8(ioaddr + ChipCmd1); + netif_info(rp, hw, dev, "Reset %s\n", (cmd1 & Cmd1Reset) ? + "failed" : "succeeded"); +} + +static void enable_mmio(long pioaddr, u32 quirks) +{ + int n; + + if (quirks & rqNeedEnMMIO) { + 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); + } + } +} + +static inline int verify_mmio(struct device *hwdev, + long pioaddr, + void __iomem *ioaddr, + u32 quirks) +{ + if (quirks & rqNeedEnMMIO) { + int i = 0; + + /* Check that selected MMIO registers match the PIO ones */ + 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) { + dev_err(hwdev, + "MMIO do not match PIO [%02x] (%02x != %02x)\n", + reg, a, b); + return -EIO; + } + } + } + return 0; +} + +/* + * Loads bytes 0x00-0x05, 0x6E-0x6F, 0x78-0x7B from EEPROM + * (plus 0x6C for Rhine-I/II) + */ +static void rhine_reload_eeprom(long pioaddr, struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + int i; + + outb(0x20, pioaddr + MACRegEEcsr); + for (i = 0; i < 1024; i++) { + if (!(inb(pioaddr + MACRegEEcsr) & 0x20)) + break; + } + if (i > 512) + pr_info("%4d cycles used @ %s:%d\n", i, __func__, __LINE__); + + /* + * 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); + + /* 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) +{ + struct rhine_private *rp = netdev_priv(dev); + const int irq = rp->irq; + + disable_irq(irq); + rhine_interrupt(irq, dev); + enable_irq(irq); +} +#endif + +static void rhine_kick_tx_threshold(struct rhine_private *rp) +{ + if (rp->tx_thresh < 0xe0) { + void __iomem *ioaddr = rp->base; + + rp->tx_thresh += 0x20; + BYTE_REG_BITS_SET(rp->tx_thresh, 0x80, ioaddr + TxConfig); + } +} + +static void rhine_tx_err(struct rhine_private *rp, u32 status) +{ + struct net_device *dev = rp->dev; + + if (status & IntrTxAborted) { + netif_info(rp, tx_err, dev, + "Abort %08x, frame dropped\n", status); + } + + if (status & IntrTxUnderrun) { + rhine_kick_tx_threshold(rp); + netif_info(rp, tx_err ,dev, "Transmitter underrun, " + "Tx threshold now %02x\n", rp->tx_thresh); + } + + if (status & IntrTxDescRace) + netif_info(rp, tx_err, dev, "Tx descriptor write-back race\n"); + + if ((status & IntrTxError) && + (status & (IntrTxAborted | IntrTxUnderrun | IntrTxDescRace)) == 0) { + rhine_kick_tx_threshold(rp); + netif_info(rp, tx_err, dev, "Unspecified error. " + "Tx threshold now %02x\n", rp->tx_thresh); + } + + rhine_restart_tx(dev); +} + +static void rhine_update_rx_crc_and_missed_errord(struct rhine_private *rp) +{ + void __iomem *ioaddr = rp->base; + struct net_device_stats *stats = &rp->dev->stats; + + stats->rx_crc_errors += ioread16(ioaddr + RxCRCErrs); + stats->rx_missed_errors += ioread16(ioaddr + RxMissed); + + /* + * 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 ... + */ + iowrite32(0, ioaddr + RxMissed); + ioread16(ioaddr + RxCRCErrs); + ioread16(ioaddr + RxMissed); +} + +#define RHINE_EVENT_NAPI_RX (IntrRxDone | \ + IntrRxErr | \ + IntrRxEmpty | \ + IntrRxOverflow | \ + IntrRxDropped | \ + IntrRxNoBuf | \ + IntrRxWakeUp) + +#define RHINE_EVENT_NAPI_TX_ERR (IntrTxError | \ + IntrTxAborted | \ + IntrTxUnderrun | \ + IntrTxDescRace) +#define RHINE_EVENT_NAPI_TX (IntrTxDone | RHINE_EVENT_NAPI_TX_ERR) + +#define RHINE_EVENT_NAPI (RHINE_EVENT_NAPI_RX | \ + RHINE_EVENT_NAPI_TX | \ + IntrStatsMax) +#define RHINE_EVENT_SLOW (IntrPCIErr | IntrLinkChange) +#define RHINE_EVENT (RHINE_EVENT_NAPI | RHINE_EVENT_SLOW) + +static int rhine_napipoll(struct napi_struct *napi, int budget) +{ + struct rhine_private *rp = container_of(napi, struct rhine_private, napi); + struct net_device *dev = rp->dev; + void __iomem *ioaddr = rp->base; + u16 enable_mask = RHINE_EVENT & 0xffff; + int work_done = 0; + u32 status; + + status = rhine_get_events(rp); + rhine_ack_events(rp, status & ~RHINE_EVENT_SLOW); + + if (status & RHINE_EVENT_NAPI_RX) + work_done += rhine_rx(dev, budget); + + if (status & RHINE_EVENT_NAPI_TX) { + if (status & RHINE_EVENT_NAPI_TX_ERR) { + /* Avoid scavenging before Tx engine turned off */ + rhine_wait_bit_low(rp, ChipCmd, CmdTxOn); + if (ioread8(ioaddr + ChipCmd) & CmdTxOn) + netif_warn(rp, tx_err, dev, "Tx still on\n"); + } + + rhine_tx(dev); + + if (status & RHINE_EVENT_NAPI_TX_ERR) + rhine_tx_err(rp, status); + } + + if (status & IntrStatsMax) { + spin_lock(&rp->lock); + rhine_update_rx_crc_and_missed_errord(rp); + spin_unlock(&rp->lock); + } + + if (status & RHINE_EVENT_SLOW) { + enable_mask &= ~RHINE_EVENT_SLOW; + schedule_work(&rp->slow_event_task); + } + + if (work_done < budget) { + napi_complete_done(napi, work_done); + iowrite16(enable_mask, ioaddr + IntrEnable); + } + return work_done; +} + +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 */ + if (dev_is_pci(dev->dev.parent)) + rhine_reload_eeprom(pioaddr, dev); +} + +static const struct net_device_ops rhine_netdev_ops = { + .ndo_open = rhine_open, + .ndo_stop = rhine_close, + .ndo_start_xmit = rhine_start_tx, + .ndo_get_stats64 = rhine_get_stats64, + .ndo_set_rx_mode = rhine_set_rx_mode, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, + .ndo_eth_ioctl = netdev_ioctl, + .ndo_tx_timeout = rhine_tx_timeout, + .ndo_vlan_rx_add_vid = rhine_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = rhine_vlan_rx_kill_vid, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = rhine_poll, +#endif +}; + +static int rhine_init_one_common(struct device *hwdev, u32 quirks, + long pioaddr, void __iomem *ioaddr, int irq) +{ + struct net_device *dev; + struct rhine_private *rp; + int i, rc, phy_id; + u8 addr[ETH_ALEN]; + const char *name; + + /* this should always be supported */ + rc = dma_set_mask(hwdev, DMA_BIT_MASK(32)); + if (rc) { + dev_err(hwdev, "32-bit DMA addresses not supported by the card!?\n"); + goto err_out; + } + + dev = alloc_etherdev(sizeof(struct rhine_private)); + if (!dev) { + rc = -ENOMEM; + goto err_out; + } + SET_NETDEV_DEV(dev, hwdev); + + rp = netdev_priv(dev); + rp->dev = dev; + rp->quirks = quirks; + rp->pioaddr = pioaddr; + rp->base = ioaddr; + rp->irq = irq; + rp->msg_enable = netif_msg_init(debug, RHINE_MSG_DEFAULT); + + phy_id = rp->quirks & rqIntPHY ? 1 : 0; + + u64_stats_init(&rp->tx_stats.syncp); + u64_stats_init(&rp->rx_stats.syncp); + + /* Get chip registers into a sane state */ + rhine_power_init(dev); + rhine_hw_init(dev, pioaddr); + + for (i = 0; i < 6; i++) + addr[i] = ioread8(ioaddr + StationAddr + i); + eth_hw_addr_set(dev, addr); + + if (!is_valid_ether_addr(dev->dev_addr)) { + /* Report it and use a random ethernet address instead */ + netdev_err(dev, "Invalid MAC address: %pM\n", dev->dev_addr); + eth_hw_addr_random(dev); + netdev_info(dev, "Using random MAC address: %pM\n", + dev->dev_addr); + } + + /* For Rhine-I/II, phy_id is loaded from EEPROM */ + if (!phy_id) + phy_id = ioread8(ioaddr + 0x6C); + + spin_lock_init(&rp->lock); + mutex_init(&rp->task_lock); + INIT_WORK(&rp->reset_task, rhine_reset_task); + INIT_WORK(&rp->slow_event_task, rhine_slow_event_task); + + 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->netdev_ops = &rhine_netdev_ops; + dev->ethtool_ops = &netdev_ethtool_ops; + dev->watchdog_timeo = TX_TIMEOUT; + + netif_napi_add(dev, &rp->napi, rhine_napipoll); + + if (rp->quirks & rqRhineI) + dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM; + + if (rp->quirks & rqMgmt) + dev->features |= NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_CTAG_RX | + NETIF_F_HW_VLAN_CTAG_FILTER; + + /* dev->name not defined before register_netdev()! */ + rc = register_netdev(dev); + if (rc) + goto err_out_free_netdev; + + if (rp->quirks & rqRhineI) + name = "Rhine"; + else if (rp->quirks & rqStatusWBRace) + name = "Rhine II"; + else if (rp->quirks & rqMgmt) + name = "Rhine III (Management Adapter)"; + else + name = "Rhine III"; + + netdev_info(dev, "VIA %s at %p, %pM, IRQ %d\n", + name, ioaddr, dev->dev_addr, rp->irq); + + dev_set_drvdata(hwdev, 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); + netdev_info(dev, + "MII PHY found at address %d, status 0x%04x advertising %04x Link %04x\n", + 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; + if (avoid_D3) + netif_info(rp, probe, dev, "No D3 power state at shutdown\n"); + + return 0; + +err_out_free_netdev: + free_netdev(dev); +err_out: + return rc; +} + +static int rhine_init_one_pci(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct device *hwdev = &pdev->dev; + int rc; + long pioaddr, memaddr; + void __iomem *ioaddr; + int io_size = pdev->revision < VTunknown0 ? 128 : 256; + +/* This driver was written to use PCI memory space. Some early versions + * of the Rhine may only work correctly with I/O space accesses. + * TODO: determine for which revisions this is true and assign the flag + * in code as opposed to this Kconfig option (???) + */ +#ifdef CONFIG_VIA_RHINE_MMIO + u32 quirks = rqNeedEnMMIO; +#else + u32 quirks = 0; +#endif + + rc = pci_enable_device(pdev); + if (rc) + goto err_out; + + if (pdev->revision < VTunknown0) { + quirks |= rqRhineI; + } else if (pdev->revision >= VT6102) { + quirks |= rqWOL | rqForceReset; + if (pdev->revision < VT6105) { + quirks |= rqStatusWBRace; + } else { + quirks |= rqIntPHY; + if (pdev->revision >= VT6105_B0) + quirks |= rq6patterns; + if (pdev->revision >= VT6105M) + quirks |= rqMgmt; + } + } + + /* sanity check */ + if ((pci_resource_len(pdev, 0) < io_size) || + (pci_resource_len(pdev, 1) < io_size)) { + rc = -EIO; + dev_err(hwdev, "Insufficient PCI resources, aborting\n"); + goto err_out_pci_disable; + } + + pioaddr = pci_resource_start(pdev, 0); + memaddr = pci_resource_start(pdev, 1); + + pci_set_master(pdev); + + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) + goto err_out_pci_disable; + + ioaddr = pci_iomap(pdev, (quirks & rqNeedEnMMIO ? 1 : 0), io_size); + if (!ioaddr) { + rc = -EIO; + dev_err(hwdev, + "ioremap failed for device %s, region 0x%X @ 0x%lX\n", + dev_name(hwdev), io_size, memaddr); + goto err_out_free_res; + } + + enable_mmio(pioaddr, quirks); + + rc = verify_mmio(hwdev, pioaddr, ioaddr, quirks); + if (rc) + goto err_out_unmap; + + rc = rhine_init_one_common(&pdev->dev, quirks, + pioaddr, ioaddr, pdev->irq); + if (!rc) + return 0; + +err_out_unmap: + pci_iounmap(pdev, ioaddr); +err_out_free_res: + pci_release_regions(pdev); +err_out_pci_disable: + pci_disable_device(pdev); +err_out: + return rc; +} + +static int rhine_init_one_platform(struct platform_device *pdev) +{ + const u32 *quirks; + int irq; + void __iomem *ioaddr; + + quirks = of_device_get_match_data(&pdev->dev); + if (!quirks) + return -EINVAL; + + ioaddr = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ioaddr)) + return PTR_ERR(ioaddr); + + irq = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (!irq) + return -EINVAL; + + return rhine_init_one_common(&pdev->dev, *quirks, + (long)ioaddr, ioaddr, irq); +} + +static int alloc_ring(struct net_device* dev) +{ + struct rhine_private *rp = netdev_priv(dev); + struct device *hwdev = dev->dev.parent; + void *ring; + dma_addr_t ring_dma; + + ring = dma_alloc_coherent(hwdev, + RX_RING_SIZE * sizeof(struct rx_desc) + + TX_RING_SIZE * sizeof(struct tx_desc), + &ring_dma, + GFP_ATOMIC); + if (!ring) { + netdev_err(dev, "Could not allocate DMA memory\n"); + return -ENOMEM; + } + if (rp->quirks & rqRhineI) { + rp->tx_bufs = dma_alloc_coherent(hwdev, + PKT_BUF_SZ * TX_RING_SIZE, + &rp->tx_bufs_dma, + GFP_ATOMIC); + if (rp->tx_bufs == NULL) { + dma_free_coherent(hwdev, + 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); + struct device *hwdev = dev->dev.parent; + + dma_free_coherent(hwdev, + 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) + dma_free_coherent(hwdev, PKT_BUF_SZ * TX_RING_SIZE, + rp->tx_bufs, rp->tx_bufs_dma); + + rp->tx_bufs = NULL; + +} + +struct rhine_skb_dma { + struct sk_buff *skb; + dma_addr_t dma; +}; + +static inline int rhine_skb_dma_init(struct net_device *dev, + struct rhine_skb_dma *sd) +{ + struct rhine_private *rp = netdev_priv(dev); + struct device *hwdev = dev->dev.parent; + const int size = rp->rx_buf_sz; + + sd->skb = netdev_alloc_skb(dev, size); + if (!sd->skb) + return -ENOMEM; + + sd->dma = dma_map_single(hwdev, sd->skb->data, size, DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(hwdev, sd->dma))) { + netif_err(rp, drv, dev, "Rx DMA mapping failure\n"); + dev_kfree_skb_any(sd->skb); + return -EIO; + } + + return 0; +} + +static void rhine_reset_rbufs(struct rhine_private *rp) +{ + int i; + + rp->cur_rx = 0; + + for (i = 0; i < RX_RING_SIZE; i++) + rp->rx_ring[i].rx_status = cpu_to_le32(DescOwn); +} + +static inline void rhine_skb_dma_nic_store(struct rhine_private *rp, + struct rhine_skb_dma *sd, int entry) +{ + rp->rx_skbuff_dma[entry] = sd->dma; + rp->rx_skbuff[entry] = sd->skb; + + rp->rx_ring[entry].addr = cpu_to_le32(sd->dma); + dma_wmb(); +} + +static void free_rbufs(struct net_device* dev); + +static int alloc_rbufs(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + dma_addr_t next; + int rc, i; + + rp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32); + 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 rhine_skb_dma sd; + + rc = rhine_skb_dma_init(dev, &sd); + if (rc < 0) { + free_rbufs(dev); + goto out; + } + + rhine_skb_dma_nic_store(rp, &sd, i); + } + + rhine_reset_rbufs(rp); +out: + return rc; +} + +static void free_rbufs(struct net_device* dev) +{ + struct rhine_private *rp = netdev_priv(dev); + struct device *hwdev = dev->dev.parent; + 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]) { + dma_unmap_single(hwdev, + rp->rx_skbuff_dma[i], + rp->rx_buf_sz, DMA_FROM_DEVICE); + 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); + if (rp->quirks & rqRhineI) + 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); + + netdev_reset_queue(dev); +} + +static void free_tbufs(struct net_device* dev) +{ + struct rhine_private *rp = netdev_priv(dev); + struct device *hwdev = dev->dev.parent; + 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]) { + dma_unmap_single(hwdev, + rp->tx_skbuff_dma[i], + rp->tx_skbuff[i]->len, + DMA_TO_DEVICE); + } + 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; + + if (!rp->mii_if.force_media) + mii_check_media(&rp->mii_if, netif_msg_link(rp), init_media); + + if (rp->mii_if.full_duplex) + iowrite8(ioread8(ioaddr + ChipCmd1) | Cmd1FDuplex, + ioaddr + ChipCmd1); + else + iowrite8(ioread8(ioaddr + ChipCmd1) & ~Cmd1FDuplex, + ioaddr + ChipCmd1); + + netif_info(rp, link, dev, "force_media %d, carrier %d\n", + rp->mii_if.force_media, netif_carrier_ok(dev)); +} + +/* Called after status of force_media possibly changed */ +static void rhine_set_carrier(struct mii_if_info *mii) +{ + struct net_device *dev = mii->dev; + struct rhine_private *rp = netdev_priv(dev); + + if (mii->force_media) { + /* autoneg is off: Link is always assumed to be up */ + if (!netif_carrier_ok(dev)) + netif_carrier_on(dev); + } + + rhine_check_media(dev, 0); + + netif_info(rp, link, dev, "force_media %d, carrier %d\n", + mii->force_media, netif_carrier_ok(dev)); +} + +/** + * rhine_set_cam - set CAM multicast filters + * @ioaddr: register block of this Rhine + * @idx: multicast CAM index [0..MCAM_SIZE-1] + * @addr: multicast address (6 bytes) + * + * Load addresses into multicast filters. + */ +static void rhine_set_cam(void __iomem *ioaddr, int idx, u8 *addr) +{ + int i; + + iowrite8(CAMC_CAMEN, ioaddr + CamCon); + wmb(); + + /* Paranoid -- idx out of range should never happen */ + idx &= (MCAM_SIZE - 1); + + iowrite8((u8) idx, ioaddr + CamAddr); + + for (i = 0; i < 6; i++, addr++) + iowrite8(*addr, ioaddr + MulticastFilter0 + i); + udelay(10); + wmb(); + + iowrite8(CAMC_CAMWR | CAMC_CAMEN, ioaddr + CamCon); + udelay(10); + + iowrite8(0, ioaddr + CamCon); +} + +/** + * rhine_set_vlan_cam - set CAM VLAN filters + * @ioaddr: register block of this Rhine + * @idx: VLAN CAM index [0..VCAM_SIZE-1] + * @addr: VLAN ID (2 bytes) + * + * Load addresses into VLAN filters. + */ +static void rhine_set_vlan_cam(void __iomem *ioaddr, int idx, u8 *addr) +{ + iowrite8(CAMC_CAMEN | CAMC_VCAMSL, ioaddr + CamCon); + wmb(); + + /* Paranoid -- idx out of range should never happen */ + idx &= (VCAM_SIZE - 1); + + iowrite8((u8) idx, ioaddr + CamAddr); + + iowrite16(*((u16 *) addr), ioaddr + MulticastFilter0 + 6); + udelay(10); + wmb(); + + iowrite8(CAMC_CAMWR | CAMC_CAMEN, ioaddr + CamCon); + udelay(10); + + iowrite8(0, ioaddr + CamCon); +} + +/** + * rhine_set_cam_mask - set multicast CAM mask + * @ioaddr: register block of this Rhine + * @mask: multicast CAM mask + * + * Mask sets multicast filters active/inactive. + */ +static void rhine_set_cam_mask(void __iomem *ioaddr, u32 mask) +{ + iowrite8(CAMC_CAMEN, ioaddr + CamCon); + wmb(); + + /* write mask */ + iowrite32(mask, ioaddr + CamMask); + + /* disable CAMEN */ + iowrite8(0, ioaddr + CamCon); +} + +/** + * rhine_set_vlan_cam_mask - set VLAN CAM mask + * @ioaddr: register block of this Rhine + * @mask: VLAN CAM mask + * + * Mask sets VLAN filters active/inactive. + */ +static void rhine_set_vlan_cam_mask(void __iomem *ioaddr, u32 mask) +{ + iowrite8(CAMC_CAMEN | CAMC_VCAMSL, ioaddr + CamCon); + wmb(); + + /* write mask */ + iowrite32(mask, ioaddr + CamMask); + + /* disable CAMEN */ + iowrite8(0, ioaddr + CamCon); +} + +/** + * rhine_init_cam_filter - initialize CAM filters + * @dev: network device + * + * Initialize (disable) hardware VLAN and multicast support on this + * Rhine. + */ +static void rhine_init_cam_filter(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + /* Disable all CAMs */ + rhine_set_vlan_cam_mask(ioaddr, 0); + rhine_set_cam_mask(ioaddr, 0); + + /* disable hardware VLAN support */ + BYTE_REG_BITS_ON(TCR_PQEN, ioaddr + TxConfig); + BYTE_REG_BITS_OFF(BCR1_VIDFR, ioaddr + PCIBusConfig1); +} + +/** + * rhine_update_vcam - update VLAN CAM filters + * @dev: rhine_private data of this Rhine + * + * Update VLAN CAM filters to match configuration change. + */ +static void rhine_update_vcam(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + u16 vid; + u32 vCAMmask = 0; /* 32 vCAMs (6105M and better) */ + unsigned int i = 0; + + for_each_set_bit(vid, rp->active_vlans, VLAN_N_VID) { + rhine_set_vlan_cam(ioaddr, i, (u8 *)&vid); + vCAMmask |= 1 << i; + if (++i >= VCAM_SIZE) + break; + } + rhine_set_vlan_cam_mask(ioaddr, vCAMmask); +} + +static int rhine_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) +{ + struct rhine_private *rp = netdev_priv(dev); + + spin_lock_bh(&rp->lock); + set_bit(vid, rp->active_vlans); + rhine_update_vcam(dev); + spin_unlock_bh(&rp->lock); + return 0; +} + +static int rhine_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) +{ + struct rhine_private *rp = netdev_priv(dev); + + spin_lock_bh(&rp->lock); + clear_bit(vid, rp->active_vlans); + rhine_update_vcam(dev); + spin_unlock_bh(&rp->lock); + return 0; +} + +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); + + if (rp->quirks & rqMgmt) + rhine_init_cam_filter(dev); + + napi_enable(&rp->napi); + + iowrite16(RHINE_EVENT & 0xffff, 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(struct rhine_private *rp) +{ + void __iomem *ioaddr = rp->base; + + iowrite8(0, ioaddr + MIICmd); + iowrite8(MII_BMSR, ioaddr + MIIRegAddr); + iowrite8(0x80, ioaddr + MIICmd); + + rhine_wait_bit_high(rp, MIIRegAddr, 0x20); + + iowrite8(MII_BMSR | 0x40, ioaddr + MIIRegAddr); +} + +/* Disable MII link status auto-polling (required for MDIO access) */ +static void rhine_disable_linkmon(struct rhine_private *rp) +{ + void __iomem *ioaddr = rp->base; + + iowrite8(0, ioaddr + MIICmd); + + if (rp->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_bit_high(rp, MIIRegAddr, 0x20); + + /* Heh. Now clear 0x80 again. */ + iowrite8(0, ioaddr + MIICmd); + } + else + rhine_wait_bit_high(rp, 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(rp); + + /* rhine_disable_linkmon already cleared MIICmd */ + iowrite8(phy_id, ioaddr + MIIPhyAddr); + iowrite8(regnum, ioaddr + MIIRegAddr); + iowrite8(0x40, ioaddr + MIICmd); /* Trigger read */ + rhine_wait_bit_low(rp, MIICmd, 0x40); + result = ioread16(ioaddr + MIIData); + + rhine_enable_linkmon(rp); + 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(rp); + + /* 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_bit_low(rp, MIICmd, 0x20); + + rhine_enable_linkmon(rp); +} + +static void rhine_task_disable(struct rhine_private *rp) +{ + mutex_lock(&rp->task_lock); + rp->task_enable = false; + mutex_unlock(&rp->task_lock); + + cancel_work_sync(&rp->slow_event_task); + cancel_work_sync(&rp->reset_task); +} + +static void rhine_task_enable(struct rhine_private *rp) +{ + mutex_lock(&rp->task_lock); + rp->task_enable = true; + mutex_unlock(&rp->task_lock); +} + +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->irq, rhine_interrupt, IRQF_SHARED, dev->name, dev); + if (rc) + goto out; + + netif_dbg(rp, ifup, dev, "%s() irq %d\n", __func__, rp->irq); + + rc = alloc_ring(dev); + if (rc < 0) + goto out_free_irq; + + rc = alloc_rbufs(dev); + if (rc < 0) + goto out_free_ring; + + alloc_tbufs(dev); + enable_mmio(rp->pioaddr, rp->quirks); + rhine_power_init(dev); + rhine_chip_reset(dev); + rhine_task_enable(rp); + init_registers(dev); + + netif_dbg(rp, ifup, dev, "%s() Done - status %04x MII status: %04x\n", + __func__, ioread16(ioaddr + ChipCmd), + mdio_read(dev, rp->mii_if.phy_id, MII_BMSR)); + + netif_start_queue(dev); + +out: + return rc; + +out_free_ring: + free_ring(dev); +out_free_irq: + free_irq(rp->irq, dev); + goto out; +} + +static void rhine_reset_task(struct work_struct *work) +{ + struct rhine_private *rp = container_of(work, struct rhine_private, + reset_task); + struct net_device *dev = rp->dev; + + mutex_lock(&rp->task_lock); + + if (!rp->task_enable) + goto out_unlock; + + napi_disable(&rp->napi); + netif_tx_disable(dev); + spin_lock_bh(&rp->lock); + + /* clear all descriptors */ + free_tbufs(dev); + alloc_tbufs(dev); + + rhine_reset_rbufs(rp); + + /* Reinitialize the hardware. */ + rhine_chip_reset(dev); + init_registers(dev); + + spin_unlock_bh(&rp->lock); + + netif_trans_update(dev); /* prevent tx timeout */ + dev->stats.tx_errors++; + netif_wake_queue(dev); + +out_unlock: + mutex_unlock(&rp->task_lock); +} + +static void rhine_tx_timeout(struct net_device *dev, unsigned int txqueue) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + netdev_warn(dev, "Transmit timed out, status %04x, PHY status %04x, resetting...\n", + ioread16(ioaddr + IntrStatus), + mdio_read(dev, rp->mii_if.phy_id, MII_BMSR)); + + schedule_work(&rp->reset_task); +} + +static inline bool rhine_tx_queue_full(struct rhine_private *rp) +{ + return (rp->cur_tx - rp->dirty_tx) >= TX_QUEUE_LEN; +} + +static netdev_tx_t rhine_start_tx(struct sk_buff *skb, + struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + struct device *hwdev = dev->dev.parent; + 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_padto(skb, ETH_ZLEN)) + return NETDEV_TX_OK; + + rp->tx_skbuff[entry] = skb; + + if ((rp->quirks & rqRhineI) && + (((unsigned long)skb->data & 3) || skb_shinfo(skb)->nr_frags != 0 || skb->ip_summed == CHECKSUM_PARTIAL)) { + /* Must use alignment buffer. */ + if (skb->len > PKT_BUF_SZ) { + /* packet too long, drop it */ + dev_kfree_skb_any(skb); + rp->tx_skbuff[entry] = NULL; + dev->stats.tx_dropped++; + return NETDEV_TX_OK; + } + + /* Padding is not copied and so must be redone. */ + skb_copy_and_csum_dev(skb, rp->tx_buf[entry]); + if (skb->len < ETH_ZLEN) + memset(rp->tx_buf[entry] + skb->len, 0, + ETH_ZLEN - skb->len); + 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] = + dma_map_single(hwdev, skb->data, skb->len, + DMA_TO_DEVICE); + if (dma_mapping_error(hwdev, rp->tx_skbuff_dma[entry])) { + dev_kfree_skb_any(skb); + rp->tx_skbuff_dma[entry] = 0; + dev->stats.tx_dropped++; + return NETDEV_TX_OK; + } + 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)); + + if (unlikely(skb_vlan_tag_present(skb))) { + u16 vid_pcp = skb_vlan_tag_get(skb); + + /* drop CFI/DEI bit, register needs VID and PCP */ + vid_pcp = (vid_pcp & VLAN_VID_MASK) | + ((vid_pcp & VLAN_PRIO_MASK) >> 1); + rp->tx_ring[entry].tx_status = cpu_to_le32((vid_pcp) << 16); + /* request tagging */ + rp->tx_ring[entry].desc_length |= cpu_to_le32(0x020000); + } + else + rp->tx_ring[entry].tx_status = 0; + + netdev_sent_queue(dev, skb->len); + /* lock eth irq */ + dma_wmb(); + rp->tx_ring[entry].tx_status |= cpu_to_le32(DescOwn); + wmb(); + + rp->cur_tx++; + /* + * Nobody wants cur_tx write to rot for ages after the NIC will have + * seen the transmit request, especially as the transmit completion + * handler could miss it. + */ + smp_wmb(); + + /* Non-x86 Todo: explicitly flush cache lines here. */ + + if (skb_vlan_tag_present(skb)) + /* Tx queues are bits 7-0 (first Tx queue: bit 7) */ + BYTE_REG_BITS_ON(1 << 7, ioaddr + TQWake); + + /* Wake the potentially-idle transmit channel */ + iowrite8(ioread8(ioaddr + ChipCmd1) | Cmd1TxDemand, + ioaddr + ChipCmd1); + IOSYNC; + + /* dirty_tx may be pessimistically out-of-sync. See rhine_tx. */ + if (rhine_tx_queue_full(rp)) { + netif_stop_queue(dev); + smp_rmb(); + /* Rejuvenate. */ + if (!rhine_tx_queue_full(rp)) + netif_wake_queue(dev); + } + + netif_dbg(rp, tx_queued, dev, "Transmit frame #%d queued in slot %d\n", + rp->cur_tx - 1, entry); + + return NETDEV_TX_OK; +} + +static void rhine_irq_disable(struct rhine_private *rp) +{ + iowrite16(0x0000, rp->base + IntrEnable); +} + +/* 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 net_device *dev = dev_instance; + struct rhine_private *rp = netdev_priv(dev); + u32 status; + int handled = 0; + + status = rhine_get_events(rp); + + netif_dbg(rp, intr, dev, "Interrupt, status %08x\n", status); + + if (status & RHINE_EVENT) { + handled = 1; + + rhine_irq_disable(rp); + napi_schedule(&rp->napi); + } + + if (status & ~(IntrLinkChange | IntrStatsMax | RHINE_EVENT_NAPI)) { + netif_err(rp, intr, dev, "Something Wicked happened! %08x\n", + status); + } + + 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); + struct device *hwdev = dev->dev.parent; + unsigned int pkts_compl = 0, bytes_compl = 0; + unsigned int dirty_tx = rp->dirty_tx; + unsigned int cur_tx; + struct sk_buff *skb; + + /* + * The race with rhine_start_tx does not matter here as long as the + * driver enforces a value of cur_tx that was relevant when the + * packet was scheduled to the network chipset. + * Executive summary: smp_rmb() balances smp_wmb() in rhine_start_tx. + */ + smp_rmb(); + cur_tx = rp->cur_tx; + /* find and cleanup dirty tx descriptors */ + while (dirty_tx != cur_tx) { + unsigned int entry = dirty_tx % TX_RING_SIZE; + u32 txstatus = le32_to_cpu(rp->tx_ring[entry].tx_status); + + netif_dbg(rp, tx_done, dev, "Tx scavenge %d status %08x\n", + entry, txstatus); + if (txstatus & DescOwn) + break; + skb = rp->tx_skbuff[entry]; + if (txstatus & 0x8000) { + netif_dbg(rp, tx_done, dev, + "Transmit error, Tx status %08x\n", txstatus); + dev->stats.tx_errors++; + if (txstatus & 0x0400) + dev->stats.tx_carrier_errors++; + if (txstatus & 0x0200) + dev->stats.tx_window_errors++; + if (txstatus & 0x0100) + dev->stats.tx_aborted_errors++; + if (txstatus & 0x0080) + dev->stats.tx_heartbeat_errors++; + if (((rp->quirks & rqRhineI) && txstatus & 0x0002) || + (txstatus & 0x0800) || (txstatus & 0x1000)) { + dev->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) + dev->stats.collisions += (txstatus >> 3) & 0x0F; + else + dev->stats.collisions += txstatus & 0x0F; + netif_dbg(rp, tx_done, dev, "collisions: %1.1x:%1.1x\n", + (txstatus >> 3) & 0xF, txstatus & 0xF); + + u64_stats_update_begin(&rp->tx_stats.syncp); + rp->tx_stats.bytes += skb->len; + rp->tx_stats.packets++; + u64_stats_update_end(&rp->tx_stats.syncp); + } + /* Free the original skb. */ + if (rp->tx_skbuff_dma[entry]) { + dma_unmap_single(hwdev, + rp->tx_skbuff_dma[entry], + skb->len, + DMA_TO_DEVICE); + } + bytes_compl += skb->len; + pkts_compl++; + dev_consume_skb_any(skb); + rp->tx_skbuff[entry] = NULL; + dirty_tx++; + } + + rp->dirty_tx = dirty_tx; + /* Pity we can't rely on the nearby BQL completion implicit barrier. */ + smp_wmb(); + + netdev_completed_queue(dev, pkts_compl, bytes_compl); + + /* cur_tx may be optimistically out-of-sync. See rhine_start_tx. */ + if (!rhine_tx_queue_full(rp) && netif_queue_stopped(dev)) { + netif_wake_queue(dev); + smp_rmb(); + /* Rejuvenate. */ + if (rhine_tx_queue_full(rp)) + netif_stop_queue(dev); + } +} + +/** + * rhine_get_vlan_tci - extract TCI from Rx data buffer + * @skb: pointer to sk_buff + * @data_size: used data area of the buffer including CRC + * + * If hardware VLAN tag extraction is enabled and the chip indicates a 802.1Q + * packet, the extracted 802.1Q header (2 bytes TPID + 2 bytes TCI) is 4-byte + * aligned following the CRC. + */ +static inline u16 rhine_get_vlan_tci(struct sk_buff *skb, int data_size) +{ + u8 *trailer = (u8 *)skb->data + ((data_size + 3) & ~3) + 2; + return be16_to_cpup((__be16 *)trailer); +} + +static inline void rhine_rx_vlan_tag(struct sk_buff *skb, struct rx_desc *desc, + int data_size) +{ + dma_rmb(); + if (unlikely(desc->desc_length & cpu_to_le32(DescTag))) { + u16 vlan_tci; + + vlan_tci = rhine_get_vlan_tci(skb, data_size); + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); + } +} + +/* Process up to limit frames from receive ring */ +static int rhine_rx(struct net_device *dev, int limit) +{ + struct rhine_private *rp = netdev_priv(dev); + struct device *hwdev = dev->dev.parent; + int entry = rp->cur_rx % RX_RING_SIZE; + int count; + + netif_dbg(rp, rx_status, dev, "%s(), entry %d status %08x\n", __func__, + entry, le32_to_cpu(rp->rx_ring[entry].rx_status)); + + /* If EOP is set on the next entry, it's a new packet. Send it up. */ + for (count = 0; count < limit; ++count) { + struct rx_desc *desc = rp->rx_ring + entry; + u32 desc_status = le32_to_cpu(desc->rx_status); + int data_size = desc_status >> 16; + + if (desc_status & DescOwn) + break; + + netif_dbg(rp, rx_status, dev, "%s() status %08x\n", __func__, + desc_status); + + if ((desc_status & (RxWholePkt | RxErr)) != RxWholePkt) { + if ((desc_status & RxWholePkt) != RxWholePkt) { + netdev_warn(dev, + "Oversized Ethernet frame spanned multiple buffers, " + "entry %#x length %d status %08x!\n", + entry, data_size, + desc_status); + dev->stats.rx_length_errors++; + } else if (desc_status & RxErr) { + /* There was a error. */ + netif_dbg(rp, rx_err, dev, + "%s() Rx error %08x\n", __func__, + desc_status); + dev->stats.rx_errors++; + if (desc_status & 0x0030) + dev->stats.rx_length_errors++; + if (desc_status & 0x0048) + dev->stats.rx_fifo_errors++; + if (desc_status & 0x0004) + dev->stats.rx_frame_errors++; + if (desc_status & 0x0002) { + /* this can also be updated outside the interrupt handler */ + spin_lock(&rp->lock); + dev->stats.rx_crc_errors++; + spin_unlock(&rp->lock); + } + } + } else { + /* Length should omit the CRC */ + int pkt_len = data_size - 4; + struct sk_buff *skb; + + /* Check if the packet is long enough to accept without + copying to a minimally-sized skbuff. */ + if (pkt_len < rx_copybreak) { + skb = netdev_alloc_skb_ip_align(dev, pkt_len); + if (unlikely(!skb)) + goto drop; + + dma_sync_single_for_cpu(hwdev, + rp->rx_skbuff_dma[entry], + rp->rx_buf_sz, + DMA_FROM_DEVICE); + + skb_copy_to_linear_data(skb, + rp->rx_skbuff[entry]->data, + pkt_len); + + dma_sync_single_for_device(hwdev, + rp->rx_skbuff_dma[entry], + rp->rx_buf_sz, + DMA_FROM_DEVICE); + } else { + struct rhine_skb_dma sd; + + if (unlikely(rhine_skb_dma_init(dev, &sd) < 0)) + goto drop; + + skb = rp->rx_skbuff[entry]; + + dma_unmap_single(hwdev, + rp->rx_skbuff_dma[entry], + rp->rx_buf_sz, + DMA_FROM_DEVICE); + rhine_skb_dma_nic_store(rp, &sd, entry); + } + + skb_put(skb, pkt_len); + + rhine_rx_vlan_tag(skb, desc, data_size); + + skb->protocol = eth_type_trans(skb, dev); + + netif_receive_skb(skb); + + u64_stats_update_begin(&rp->rx_stats.syncp); + rp->rx_stats.bytes += pkt_len; + rp->rx_stats.packets++; + u64_stats_update_end(&rp->rx_stats.syncp); + } +give_descriptor_to_nic: + desc->rx_status = cpu_to_le32(DescOwn); + entry = (++rp->cur_rx) % RX_RING_SIZE; + } + + return count; + +drop: + dev->stats.rx_dropped++; + goto give_descriptor_to_nic; +} + +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 occurred, we need to sort them out before doing Tx. + * In that case the ISR will be back here RSN anyway. + */ + intr_status = rhine_get_events(rp); + + 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); + + if (rp->tx_ring[entry].desc_length & cpu_to_le32(0x020000)) + /* Tx queues are bits 7-0 (first Tx queue: bit 7) */ + BYTE_REG_BITS_ON(1 << 7, ioaddr + TQWake); + + iowrite8(ioread8(ioaddr + ChipCmd1) | Cmd1TxDemand, + ioaddr + ChipCmd1); + IOSYNC; + } + else { + /* This should never happen */ + netif_warn(rp, tx_err, dev, "another error occurred %08x\n", + intr_status); + } + +} + +static void rhine_slow_event_task(struct work_struct *work) +{ + struct rhine_private *rp = + container_of(work, struct rhine_private, slow_event_task); + struct net_device *dev = rp->dev; + u32 intr_status; + + mutex_lock(&rp->task_lock); + + if (!rp->task_enable) + goto out_unlock; + + intr_status = rhine_get_events(rp); + rhine_ack_events(rp, intr_status & RHINE_EVENT_SLOW); + + if (intr_status & IntrLinkChange) + rhine_check_media(dev, 0); + + if (intr_status & IntrPCIErr) + netif_warn(rp, hw, dev, "PCI error\n"); + + iowrite16(RHINE_EVENT & 0xffff, rp->base + IntrEnable); + +out_unlock: + mutex_unlock(&rp->task_lock); +} + +static void +rhine_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) +{ + struct rhine_private *rp = netdev_priv(dev); + unsigned int start; + + spin_lock_bh(&rp->lock); + rhine_update_rx_crc_and_missed_errord(rp); + spin_unlock_bh(&rp->lock); + + netdev_stats_to_stats64(stats, &dev->stats); + + do { + start = u64_stats_fetch_begin_irq(&rp->rx_stats.syncp); + stats->rx_packets = rp->rx_stats.packets; + stats->rx_bytes = rp->rx_stats.bytes; + } while (u64_stats_fetch_retry_irq(&rp->rx_stats.syncp, start)); + + do { + start = u64_stats_fetch_begin_irq(&rp->tx_stats.syncp); + stats->tx_packets = rp->tx_stats.packets; + stats->tx_bytes = rp->tx_stats.bytes; + } while (u64_stats_fetch_retry_irq(&rp->tx_stats.syncp, start)); +} + +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 = 0x0C; /* Note: 0x02=accept runt, 0x01=accept errs */ + struct netdev_hw_addr *ha; + + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + rx_mode = 0x1C; + iowrite32(0xffffffff, ioaddr + MulticastFilter0); + iowrite32(0xffffffff, ioaddr + MulticastFilter1); + } else if ((netdev_mc_count(dev) > multicast_filter_limit) || + (dev->flags & IFF_ALLMULTI)) { + /* Too many to match, or accept all multicasts. */ + iowrite32(0xffffffff, ioaddr + MulticastFilter0); + iowrite32(0xffffffff, ioaddr + MulticastFilter1); + } else if (rp->quirks & rqMgmt) { + int i = 0; + u32 mCAMmask = 0; /* 32 mCAMs (6105M and better) */ + netdev_for_each_mc_addr(ha, dev) { + if (i == MCAM_SIZE) + break; + rhine_set_cam(ioaddr, i, ha->addr); + mCAMmask |= 1 << i; + i++; + } + rhine_set_cam_mask(ioaddr, mCAMmask); + } else { + memset(mc_filter, 0, sizeof(mc_filter)); + netdev_for_each_mc_addr(ha, dev) { + int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26; + + mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); + } + iowrite32(mc_filter[0], ioaddr + MulticastFilter0); + iowrite32(mc_filter[1], ioaddr + MulticastFilter1); + } + /* enable/disable VLAN receive filtering */ + if (rp->quirks & rqMgmt) { + if (dev->flags & IFF_PROMISC) + BYTE_REG_BITS_OFF(BCR1_VIDFR, ioaddr + PCIBusConfig1); + else + BYTE_REG_BITS_ON(BCR1_VIDFR, ioaddr + PCIBusConfig1); + } + BYTE_REG_BITS_ON(rx_mode, ioaddr + RxConfig); +} + +static void netdev_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct device *hwdev = dev->dev.parent; + + strscpy(info->driver, DRV_NAME, sizeof(info->driver)); + strscpy(info->bus_info, dev_name(hwdev), sizeof(info->bus_info)); +} + +static int netdev_get_link_ksettings(struct net_device *dev, + struct ethtool_link_ksettings *cmd) +{ + struct rhine_private *rp = netdev_priv(dev); + + mutex_lock(&rp->task_lock); + mii_ethtool_get_link_ksettings(&rp->mii_if, cmd); + mutex_unlock(&rp->task_lock); + + return 0; +} + +static int netdev_set_link_ksettings(struct net_device *dev, + const struct ethtool_link_ksettings *cmd) +{ + struct rhine_private *rp = netdev_priv(dev); + int rc; + + mutex_lock(&rp->task_lock); + rc = mii_ethtool_set_link_ksettings(&rp->mii_if, cmd); + rhine_set_carrier(&rp->mii_if); + mutex_unlock(&rp->task_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) +{ + struct rhine_private *rp = netdev_priv(dev); + + return rp->msg_enable; +} + +static void netdev_set_msglevel(struct net_device *dev, u32 value) +{ + struct rhine_private *rp = netdev_priv(dev); + + rp->msg_enable = 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 const struct ethtool_ops netdev_ethtool_ops = { + .get_drvinfo = netdev_get_drvinfo, + .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_link_ksettings = netdev_get_link_ksettings, + .set_link_ksettings = netdev_set_link_ksettings, +}; + +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; + + mutex_lock(&rp->task_lock); + rc = generic_mii_ioctl(&rp->mii_if, if_mii(rq), cmd, NULL); + rhine_set_carrier(&rp->mii_if); + mutex_unlock(&rp->task_lock); + + return rc; +} + +static int rhine_close(struct net_device *dev) +{ + struct rhine_private *rp = netdev_priv(dev); + void __iomem *ioaddr = rp->base; + + rhine_task_disable(rp); + napi_disable(&rp->napi); + netif_stop_queue(dev); + + netif_dbg(rp, ifdown, dev, "Shutting down ethercard, status was %04x\n", + ioread16(ioaddr + ChipCmd)); + + /* Switch to loopback mode to avoid hardware races. */ + iowrite8(rp->tx_thresh | 0x02, ioaddr + TxConfig); + + rhine_irq_disable(rp); + + /* Stop the chip's Tx and Rx processes. */ + iowrite16(CmdStop, ioaddr + ChipCmd); + + free_irq(rp->irq, dev); + free_rbufs(dev); + free_tbufs(dev); + free_ring(dev); + + return 0; +} + + +static void rhine_remove_one_pci(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); +} + +static int rhine_remove_one_platform(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct rhine_private *rp = netdev_priv(dev); + + unregister_netdev(dev); + + iounmap(rp->base); + + free_netdev(dev); + + return 0; +} + +static void rhine_shutdown_pci(struct pci_dev *pdev) +{ + 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 + WOLcgClr); + + spin_lock(&rp->lock); + + 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); + } + + spin_unlock(&rp->lock); + + if (system_state == SYSTEM_POWER_OFF && !avoid_D3) { + iowrite8(ioread8(ioaddr + StickyHW) | 0x03, ioaddr + StickyHW); + + pci_wake_from_d3(pdev, true); + pci_set_power_state(pdev, PCI_D3hot); + } +} + +#ifdef CONFIG_PM_SLEEP +static int rhine_suspend(struct device *device) +{ + struct net_device *dev = dev_get_drvdata(device); + struct rhine_private *rp = netdev_priv(dev); + + if (!netif_running(dev)) + return 0; + + rhine_task_disable(rp); + rhine_irq_disable(rp); + napi_disable(&rp->napi); + + netif_device_detach(dev); + + if (dev_is_pci(device)) + rhine_shutdown_pci(to_pci_dev(device)); + + return 0; +} + +static int rhine_resume(struct device *device) +{ + struct net_device *dev = dev_get_drvdata(device); + struct rhine_private *rp = netdev_priv(dev); + + if (!netif_running(dev)) + return 0; + + enable_mmio(rp->pioaddr, rp->quirks); + rhine_power_init(dev); + free_tbufs(dev); + alloc_tbufs(dev); + rhine_reset_rbufs(rp); + rhine_task_enable(rp); + spin_lock_bh(&rp->lock); + init_registers(dev); + spin_unlock_bh(&rp->lock); + + netif_device_attach(dev); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(rhine_pm_ops, rhine_suspend, rhine_resume); +#define RHINE_PM_OPS (&rhine_pm_ops) + +#else + +#define RHINE_PM_OPS NULL + +#endif /* !CONFIG_PM_SLEEP */ + +static struct pci_driver rhine_driver_pci = { + .name = DRV_NAME, + .id_table = rhine_pci_tbl, + .probe = rhine_init_one_pci, + .remove = rhine_remove_one_pci, + .shutdown = rhine_shutdown_pci, + .driver.pm = RHINE_PM_OPS, +}; + +static struct platform_driver rhine_driver_platform = { + .probe = rhine_init_one_platform, + .remove = rhine_remove_one_platform, + .driver = { + .name = DRV_NAME, + .of_match_table = rhine_of_tbl, + .pm = RHINE_PM_OPS, + } +}; + +static const struct dmi_system_id rhine_dmi_table[] __initconst = { + { + .ident = "EPIA-M", + .matches = { + DMI_MATCH(DMI_BIOS_VENDOR, "Award Software International, Inc."), + DMI_MATCH(DMI_BIOS_VERSION, "6.00 PG"), + }, + }, + { + .ident = "KV7", + .matches = { + DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"), + DMI_MATCH(DMI_BIOS_VERSION, "6.00 PG"), + }, + }, + { NULL } +}; + +static int __init rhine_init(void) +{ + int ret_pci, ret_platform; + +/* when a module, this is printed whether or not devices are found in probe */ + if (dmi_check_system(rhine_dmi_table)) { + /* these BIOSes fail at PXE boot if chip is in D3 */ + avoid_D3 = true; + pr_warn("Broken BIOS detected, avoid_D3 enabled\n"); + } + else if (avoid_D3) + pr_info("avoid_D3 set\n"); + + ret_pci = pci_register_driver(&rhine_driver_pci); + ret_platform = platform_driver_register(&rhine_driver_platform); + if ((ret_pci < 0) && (ret_platform < 0)) + return ret_pci; + + return 0; +} + + +static void __exit rhine_cleanup(void) +{ + platform_driver_unregister(&rhine_driver_platform); + pci_unregister_driver(&rhine_driver_pci); +} + + +module_init(rhine_init); +module_exit(rhine_cleanup); |