natsemi.c
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- /* natsemi.c: A Linux PCI Ethernet driver for the NatSemi DP8381x series. */
- /*
- Written/copyright 1999-2001 by Donald Becker.
- Portions copyright (c) 2001 Sun Microsystems (thockin@sun.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. License for under other terms may be
- available. Contact the original author for details.
- The original author may be reached as becker@scyld.com, or at
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
- Support information and updates available at
- http://www.scyld.com/network/netsemi.html
- Linux kernel modifications:
- Version 1.0.1:
- - Spinlock fixes
- - Bug fixes and better intr performance (Tjeerd)
- Version 1.0.2:
- - Now reads correct MAC address from eeprom
- Version 1.0.3:
- - Eliminate redundant priv->tx_full flag
- - Call netif_start_queue from dev->tx_timeout
- - wmb() in start_tx() to flush data
- - Update Tx locking
- - Clean up PCI enable (davej)
- Version 1.0.4:
- - Merge Donald Becker's natsemi.c version 1.07
- Version 1.0.5:
- - { fill me in }
- Version 1.0.6:
- * ethtool support (jgarzik)
- * Proper initialization of the card (which sometimes
- fails to occur and leaves the card in a non-functional
- state). (uzi)
- * Some documented register settings to optimize some
- of the 100Mbit autodetection circuitry in rev C cards. (uzi)
- * Polling of the PHY intr for stuff like link state
- change and auto- negotiation to finally work properly. (uzi)
- * One-liner removal of a duplicate declaration of
- netdev_error(). (uzi)
- Version 1.0.7: (Manfred Spraul)
- * pci dma
- * SMP locking update
- * full reset added into tx_timeout
- * correct multicast hash generation (both big and little endian)
- [copied from a natsemi driver version
- from Myrio Corporation, Greg Smith]
- * suspend/resume
- version 1.0.8 (Tim Hockin <thockin@sun.com>)
- * ETHTOOL_* support
- * Wake on lan support (Erik Gilling)
- * MXDMA fixes for serverworks
- * EEPROM reload
- version 1.0.9 (Manfred Spraul)
- * Main change: fix lack of synchronize
- netif_close/netif_suspend against a last interrupt
- or packet.
- * do not enable superflous interrupts (e.g. the
- drivers relies on TxDone - TxIntr not needed)
- * wait that the hardware has really stopped in close
- and suspend.
- * workaround for the (at least) gcc-2.95.1 compiler
- problem. Also simplifies the code a bit.
- * disable_irq() in tx_timeout - needed to protect
- against rx interrupts.
- * stop the nic before switching into silent rx mode
- for wol (required according to docu).
- version 1.0.10:
- * use long for ee_addr (various)
- * print pointers properly (DaveM)
- * include asm/irq.h (?)
-
- version 1.0.11:
- * check and reset if PHY errors appear (Adrian Sun)
- * WoL cleanup (Tim Hockin)
- * Magic number cleanup (Tim Hockin)
- * Don't reload EEPROM on every reset (Tim Hockin)
- * Save and restore EEPROM state across reset (Tim Hockin)
- * MDIO Cleanup (Tim Hockin)
- * Reformat register offsets/bits (jgarzik)
- version 1.0.12:
- * ETHTOOL_* further support (Tim Hockin)
- version 1.0.13:
- * ETHTOOL_GEEPROM support (Tim Hockin)
- version 1.0.14:
- * Cleanup some messages and autoneg in ethtool (Tim Hockin)
- TODO:
- * big endian support with CFG:BEM instead of cpu_to_le32
- * support for an external PHY
- * flow control
- */
- #if !defined(__OPTIMIZE__)
- #warning You must compile this file with the correct options!
- #warning See the last lines of the source file.
- #error You must compile this driver with "-O".
- #endif
- #include <linux/config.h>
- #include <linux/module.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/spinlock.h>
- #include <linux/ethtool.h>
- #include <linux/delay.h>
- #include <linux/rtnetlink.h>
- #include <linux/mii.h>
- #include <asm/processor.h> /* Processor type for cache alignment. */
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include <asm/uaccess.h>
- #define DRV_NAME "natsemi"
- #define DRV_VERSION "1.07+LK1.0.14"
- #define DRV_RELDATE "Nov 27, 2001"
- /* Updated to recommendations in pci-skeleton v2.03. */
- /* Automatically extracted configuration info:
- probe-func: natsemi_probe
- config-in: tristate 'National Semiconductor DP8381x series PCI Ethernet support' CONFIG_NATSEMI
- c-help-name: National Semiconductor DP8381x series PCI Ethernet support
- c-help-symbol: CONFIG_NATSEMI
- c-help: This driver is for the National Semiconductor DP8381x series,
- c-help: including the 8381[56] chips.
- c-help: More specific information and updates are available from
- c-help: http://www.scyld.com/network/natsemi.html
- */
- /* The user-configurable values.
- These may be modified when a driver module is loaded.*/
- #define NATSEMI_DEF_MSG (NETIF_MSG_DRV |
- NETIF_MSG_LINK |
- NETIF_MSG_WOL |
- NETIF_MSG_RX_ERR |
- NETIF_MSG_TX_ERR)
- static int debug = NATSEMI_DEF_MSG;
- /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
- static int max_interrupt_work = 20;
- static int mtu;
- /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
- This chip uses a 512 element hash table based on the Ethernet CRC. */
- static int multicast_filter_limit = 100;
- /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
- Setting to > 1518 effectively disables this feature. */
- static int rx_copybreak;
- /* Used to pass the media type, etc.
- Both 'options[]' and 'full_duplex[]' should exist for driver
- interoperability.
- The media type is usually passed in 'options[]'.
- */
- #define MAX_UNITS 8 /* More are supported, limit only on options */
- static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
- static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
- /* Operational parameters that are set at compile time. */
- /* Keep the ring sizes a power of two for compile efficiency.
- The compiler will convert <unsigned>'%'<2^N> into a bit mask.
- Making the Tx ring too large decreases the effectiveness of channel
- bonding and packet priority.
- There are no ill effects from too-large receive rings. */
- #define TX_RING_SIZE 16
- #define TX_QUEUE_LEN 10 /* Limit ring entries actually used, min 4. */
- #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 NATSEMI_HW_TIMEOUT 400
- #define NATSEMI_TIMER_FREQ 3*HZ
- #define NATSEMI_PG0_NREGS 64
- #define NATSEMI_RFDR_NREGS 8
- #define NATSEMI_PG1_NREGS 4
- #define NATSEMI_NREGS (NATSEMI_PG0_NREGS + NATSEMI_RFDR_NREGS +
- NATSEMI_PG1_NREGS)
- #define NATSEMI_REGS_VER 1 /* v1 added RFDR registers */
- #define NATSEMI_REGS_SIZE (NATSEMI_NREGS * sizeof(u32))
- #define NATSEMI_EEPROM_SIZE 24 /* 12 16-bit values */
- #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */
- /* These identify the driver base version and may not be removed. */
- static char version[] __devinitdata =
- KERN_INFO DRV_NAME ".c:v1.07 1/9/2001 Written by Donald Becker <becker@scyld.com>n"
- KERN_INFO " http://www.scyld.com/network/natsemi.htmln"
- KERN_INFO " (unofficial 2.4.x kernel port, version " DRV_VERSION ", " DRV_RELDATE " Jeff Garzik, Tjeerd Mulder)n";
- MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
- MODULE_DESCRIPTION("National Semiconductor DP8381x series PCI Ethernet driver");
- MODULE_LICENSE("GPL");
- MODULE_PARM(max_interrupt_work, "i");
- MODULE_PARM(mtu, "i");
- MODULE_PARM(debug, "i");
- MODULE_PARM(rx_copybreak, "i");
- MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
- MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
- MODULE_PARM_DESC(max_interrupt_work, "DP8381x maximum events handled per interrupt");
- MODULE_PARM_DESC(mtu, "DP8381x MTU (all boards)");
- MODULE_PARM_DESC(debug, "DP8381x debug bitmask");
- MODULE_PARM_DESC(rx_copybreak, "DP8381x copy breakpoint for copy-only-tiny-frames");
- MODULE_PARM_DESC(options, "DP8381x: Bits 0-3: media type, bit 17: full duplex");
- MODULE_PARM_DESC(full_duplex, "DP8381x full duplex setting(s) (1)");
- /*
- Theory of Operation
- I. Board Compatibility
- This driver is designed for National Semiconductor DP83815 PCI Ethernet NIC.
- It also works with other chips in in the DP83810 series.
- II. Board-specific settings
- This driver requires the PCI interrupt line to be valid.
- It honors the EEPROM-set values.
- 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.
- The NatSemi design uses a 'next descriptor' pointer that the driver forms
- into a list.
- IIIb/c. Transmit/Receive Structure
- This driver uses a zero-copy receive and transmit scheme.
- 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 a later phase of receives.
- 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.
- A subtle aspect of the operation is that unaligned buffers are not permitted
- by the hardware. Thus the IP header at offset 14 in an ethernet frame isn't
- longword aligned for further processing. On copies frames are put into the
- skbuff at an offset of "+2", 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->tbusy flag. 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 and 'dev->tbusy'
- flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
- queue slot is empty, it clears the tbusy flag when finished otherwise it sets
- the 'lp->tx_full' flag.
- The interrupt handler has exclusive control over the Rx ring and records stats
- from the Tx ring. After reaping the stats, it marks the Tx queue entry as
- empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it
- clears both the tx_full and tbusy flags.
- IV. Notes
- NatSemi PCI network controllers are very uncommon.
- IVb. References
- http://www.scyld.com/expert/100mbps.html
- http://www.scyld.com/expert/NWay.html
- Datasheet is available from:
- http://www.national.com/pf/DP/DP83815.html
- IVc. Errata
- None characterised.
- */
- enum pcistuff {
- PCI_USES_IO = 0x01,
- PCI_USES_MEM = 0x02,
- PCI_USES_MASTER = 0x04,
- PCI_ADDR0 = 0x08,
- PCI_ADDR1 = 0x10,
- };
- /* MMIO operations required */
- #define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR1)
- /* array of board data directly indexed by pci_tbl[x].driver_data */
- static struct {
- const char *name;
- unsigned long flags;
- } natsemi_pci_info[] __devinitdata = {
- { "NatSemi DP8381[56]", PCI_IOTYPE },
- };
- static struct pci_device_id natsemi_pci_tbl[] __devinitdata = {
- { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83815, PCI_ANY_ID, PCI_ANY_ID, },
- { 0, },
- };
- MODULE_DEVICE_TABLE(pci, natsemi_pci_tbl);
- /* Offsets to the device registers.
- Unlike software-only systems, device drivers interact with complex hardware.
- It's not useful to define symbolic names for every register bit in the
- device.
- */
- enum register_offsets {
- ChipCmd = 0x00,
- ChipConfig = 0x04,
- EECtrl = 0x08,
- PCIBusCfg = 0x0C,
- IntrStatus = 0x10,
- IntrMask = 0x14,
- IntrEnable = 0x18,
- TxRingPtr = 0x20,
- TxConfig = 0x24,
- RxRingPtr = 0x30,
- RxConfig = 0x34,
- ClkRun = 0x3C,
- WOLCmd = 0x40,
- PauseCmd = 0x44,
- RxFilterAddr = 0x48,
- RxFilterData = 0x4C,
- BootRomAddr = 0x50,
- BootRomData = 0x54,
- SiliconRev = 0x58,
- StatsCtrl = 0x5C,
- StatsData = 0x60,
- RxPktErrs = 0x60,
- RxMissed = 0x68,
- RxCRCErrs = 0x64,
- BasicControl = 0x80,
- BasicStatus = 0x84,
- AnegAdv = 0x90,
- AnegPeer = 0x94,
- PhyStatus = 0xC0,
- MIntrCtrl = 0xC4,
- MIntrStatus = 0xC8,
- PhyCtrl = 0xE4,
- /* These are from the spec, around page 78... on a separate table.
- * The meaning of these registers depend on the value of PGSEL. */
- PGSEL = 0xCC,
- PMDCSR = 0xE4,
- TSTDAT = 0xFC,
- DSPCFG = 0xF4,
- SDCFG = 0xF8
- };
- /* the values for the 'magic' registers above (PGSEL=1) */
- #ifdef CONFIG_NATSEMI_CABLE_MAGIC
- #define PMDCSR_VAL 0x1898
- #else
- #define PMDCSR_VAL 0x189C
- #endif
- #define TSTDAT_VAL 0x0
- #define DSPCFG_VAL 0x5040
- #define SDCFG_VAL 0x008c
- /* misc PCI space registers */
- enum pci_register_offsets {
- PCIPM = 0x44,
- };
- enum ChipCmd_bits {
- ChipReset = 0x100,
- RxReset = 0x20,
- TxReset = 0x10,
- RxOff = 0x08,
- RxOn = 0x04,
- TxOff = 0x02,
- TxOn = 0x01,
- };
- enum ChipConfig_bits {
- CfgPhyDis = 0x200,
- CfgPhyRst = 0x400,
- CfgExtPhy = 0x1000,
- CfgAnegEnable = 0x2000,
- CfgAneg100 = 0x4000,
- CfgAnegFull = 0x8000,
- CfgAnegDone = 0x8000000,
- CfgFullDuplex = 0x20000000,
- CfgSpeed100 = 0x40000000,
- CfgLink = 0x80000000,
- };
- enum EECtrl_bits {
- EE_ShiftClk = 0x04,
- EE_DataIn = 0x01,
- EE_ChipSelect = 0x08,
- EE_DataOut = 0x02,
- };
- enum PCIBusCfg_bits {
- EepromReload = 0x4,
- };
- /* Bits in the interrupt status/mask registers. */
- enum IntrStatus_bits {
- IntrRxDone = 0x0001,
- IntrRxIntr = 0x0002,
- IntrRxErr = 0x0004,
- IntrRxEarly = 0x0008,
- IntrRxIdle = 0x0010,
- IntrRxOverrun = 0x0020,
- IntrTxDone = 0x0040,
- IntrTxIntr = 0x0080,
- IntrTxErr = 0x0100,
- IntrTxIdle = 0x0200,
- IntrTxUnderrun = 0x0400,
- StatsMax = 0x0800,
- SWInt = 0x1000,
- WOLPkt = 0x2000,
- LinkChange = 0x4000,
- IntrHighBits = 0x8000,
- RxStatusFIFOOver = 0x10000,
- IntrPCIErr = 0xf00000,
- RxResetDone = 0x1000000,
- TxResetDone = 0x2000000,
- IntrAbnormalSummary = 0xCD20,
- };
- /*
- * Default Interrupts:
- * Rx OK, Rx Packet Error, Rx Overrun,
- * Tx OK, Tx Packet Error, Tx Underrun,
- * MIB Service, Phy Interrupt, High Bits,
- * Rx Status FIFO overrun,
- * Received Target Abort, Received Master Abort,
- * Signalled System Error, Received Parity Error
- */
- #define DEFAULT_INTR 0x00f1cd65
- enum TxConfig_bits {
- TxDrthMask = 0x3f,
- TxFlthMask = 0x3f00,
- TxMxdmaMask = 0x700000,
- TxMxdma_512 = 0x0,
- TxMxdma_4 = 0x100000,
- TxMxdma_8 = 0x200000,
- TxMxdma_16 = 0x300000,
- TxMxdma_32 = 0x400000,
- TxMxdma_64 = 0x500000,
- TxMxdma_128 = 0x600000,
- TxMxdma_256 = 0x700000,
- TxCollRetry = 0x800000,
- TxAutoPad = 0x10000000,
- TxMacLoop = 0x20000000,
- TxHeartIgn = 0x40000000,
- TxCarrierIgn = 0x80000000
- };
- enum RxConfig_bits {
- RxDrthMask = 0x3e,
- RxMxdmaMask = 0x700000,
- RxMxdma_512 = 0x0,
- RxMxdma_4 = 0x100000,
- RxMxdma_8 = 0x200000,
- RxMxdma_16 = 0x300000,
- RxMxdma_32 = 0x400000,
- RxMxdma_64 = 0x500000,
- RxMxdma_128 = 0x600000,
- RxMxdma_256 = 0x700000,
- RxAcceptLong = 0x8000000,
- RxAcceptTx = 0x10000000,
- RxAcceptRunt = 0x40000000,
- RxAcceptErr = 0x80000000
- };
- enum ClkRun_bits {
- PMEEnable = 0x100,
- PMEStatus = 0x8000,
- };
- enum WolCmd_bits {
- WakePhy = 0x1,
- WakeUnicast = 0x2,
- WakeMulticast = 0x4,
- WakeBroadcast = 0x8,
- WakeArp = 0x10,
- WakePMatch0 = 0x20,
- WakePMatch1 = 0x40,
- WakePMatch2 = 0x80,
- WakePMatch3 = 0x100,
- WakeMagic = 0x200,
- WakeMagicSecure = 0x400,
- SecureHack = 0x100000,
- WokePhy = 0x400000,
- WokeUnicast = 0x800000,
- WokeMulticast = 0x1000000,
- WokeBroadcast = 0x2000000,
- WokeArp = 0x4000000,
- WokePMatch0 = 0x8000000,
- WokePMatch1 = 0x10000000,
- WokePMatch2 = 0x20000000,
- WokePMatch3 = 0x40000000,
- WokeMagic = 0x80000000,
- WakeOptsSummary = 0x7ff
- };
- enum RxFilterAddr_bits {
- RFCRAddressMask = 0x3ff,
- AcceptMulticast = 0x00200000,
- AcceptMyPhys = 0x08000000,
- AcceptAllPhys = 0x10000000,
- AcceptAllMulticast = 0x20000000,
- AcceptBroadcast = 0x40000000,
- RxFilterEnable = 0x80000000
- };
- enum StatsCtrl_bits {
- StatsWarn = 0x1,
- StatsFreeze = 0x2,
- StatsClear = 0x4,
- StatsStrobe = 0x8,
- };
- enum MIntrCtrl_bits {
- MICRIntEn = 0x2,
- };
- enum PhyCtrl_bits {
- PhyAddrMask = 0xf,
- };
- #define SRR_REV_C 0x0302
- #define SRR_REV_D 0x0403
- /* The Rx and Tx buffer descriptors. */
- /* Note that using only 32 bit fields simplifies conversion to big-endian
- architectures. */
- struct netdev_desc {
- u32 next_desc;
- s32 cmd_status;
- u32 addr;
- u32 software_use;
- };
- /* Bits in network_desc.status */
- enum desc_status_bits {
- DescOwn=0x80000000, DescMore=0x40000000, DescIntr=0x20000000,
- DescNoCRC=0x10000000, DescPktOK=0x08000000,
- DescSizeMask=0xfff,
- DescTxAbort=0x04000000, DescTxFIFO=0x02000000,
- DescTxCarrier=0x01000000, DescTxDefer=0x00800000,
- DescTxExcDefer=0x00400000, DescTxOOWCol=0x00200000,
- DescTxExcColl=0x00100000, DescTxCollCount=0x000f0000,
-
- DescRxAbort=0x04000000, DescRxOver=0x02000000,
- DescRxDest=0x01800000, DescRxLong=0x00400000,
- DescRxRunt=0x00200000, DescRxInvalid=0x00100000,
- DescRxCRC=0x00080000, DescRxAlign=0x00040000,
- DescRxLoop=0x00020000, DesRxColl=0x00010000,
- };
- struct netdev_private {
- /* Descriptor rings first for alignment. */
- dma_addr_t ring_dma;
- struct netdev_desc* rx_ring;
- struct netdev_desc* tx_ring;
- /* The addresses of receive-in-place skbuffs. */
- struct sk_buff* rx_skbuff[RX_RING_SIZE];
- dma_addr_t rx_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_dma[TX_RING_SIZE];
- struct net_device_stats stats;
- struct timer_list timer; /* Media monitoring timer. */
- /* Frequently used values: keep some adjacent for cache effect. */
- struct pci_dev *pci_dev;
- struct netdev_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. */
- /* These values are keep track of the transceiver/media in use. */
- unsigned int full_duplex;
- /* Rx filter. */
- u32 cur_rx_mode;
- u32 rx_filter[16];
- /* FIFO and PCI burst thresholds. */
- u32 tx_config, rx_config;
- /* original contents of ClkRun register */
- u32 SavedClkRun;
- /* silicon revision */
- u32 srr;
- /* MII transceiver section. */
- u16 advertising; /* NWay media advertisement */
- unsigned int iosize;
- spinlock_t lock;
- u32 msg_enable;
- };
- static int eeprom_read(long ioaddr, int location);
- static int mdio_read(struct net_device *dev, int phy_id, int reg);
- static void mdio_write(struct net_device *dev, int phy_id, int reg, u16 data);
- static void natsemi_reset(struct net_device *dev);
- static void natsemi_reload_eeprom(struct net_device *dev);
- static void natsemi_stop_rxtx(struct net_device *dev);
- static int netdev_open(struct net_device *dev);
- static void check_link(struct net_device *dev);
- static void netdev_timer(unsigned long data);
- static void tx_timeout(struct net_device *dev);
- static int alloc_ring(struct net_device *dev);
- static void init_ring(struct net_device *dev);
- static void drain_ring(struct net_device *dev);
- static void free_ring(struct net_device *dev);
- static void init_registers(struct net_device *dev);
- static int start_tx(struct sk_buff *skb, struct net_device *dev);
- static void intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
- static void netdev_error(struct net_device *dev, int intr_status);
- static void netdev_rx(struct net_device *dev);
- static void netdev_tx_done(struct net_device *dev);
- static void __set_rx_mode(struct net_device *dev);
- static void set_rx_mode(struct net_device *dev);
- static void __get_stats(struct net_device *dev);
- static struct net_device_stats *get_stats(struct net_device *dev);
- static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
- static int netdev_set_wol(struct net_device *dev, u32 newval);
- static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur);
- static int netdev_set_sopass(struct net_device *dev, u8 *newval);
- static int netdev_get_sopass(struct net_device *dev, u8 *data);
- static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
- static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
- static void enable_wol_mode(struct net_device *dev, int enable_intr);
- static int netdev_close(struct net_device *dev);
- static int netdev_get_regs(struct net_device *dev, u8 *buf);
- static int netdev_get_eeprom(struct net_device *dev, u8 *buf);
- static int __devinit natsemi_probe1 (struct pci_dev *pdev,
- const struct pci_device_id *ent)
- {
- struct net_device *dev;
- struct netdev_private *np;
- int i, option, irq, chip_idx = ent->driver_data;
- static int find_cnt = -1;
- unsigned long ioaddr, iosize;
- const int pcibar = 1; /* PCI base address register */
- int prev_eedata;
- u32 tmp;
- /* 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
- i = pci_enable_device(pdev);
- if (i) return i;
- /* natsemi has a non-standard PM control register
- * in PCI config space. Some boards apparently need
- * to be brought to D0 in this manner.
- */
- pci_read_config_dword(pdev, PCIPM, &tmp);
- if (tmp & PCI_PM_CTRL_STATE_MASK) {
- /* D0 state, disable PME assertion */
- u32 newtmp = tmp & ~PCI_PM_CTRL_STATE_MASK;
- pci_write_config_dword(pdev, PCIPM, newtmp);
- }
- find_cnt++;
- ioaddr = pci_resource_start(pdev, pcibar);
- iosize = pci_resource_len(pdev, pcibar);
- irq = pdev->irq;
- if (natsemi_pci_info[chip_idx].flags & PCI_USES_MASTER)
- pci_set_master(pdev);
- dev = alloc_etherdev(sizeof (struct netdev_private));
- if (!dev)
- return -ENOMEM;
- SET_MODULE_OWNER(dev);
- i = pci_request_regions(pdev, dev->name);
- if (i) {
- kfree(dev);
- return i;
- }
- {
- void *mmio = ioremap (ioaddr, iosize);
- if (!mmio) {
- pci_release_regions(pdev);
- kfree(dev);
- return -ENOMEM;
- }
- ioaddr = (unsigned long) mmio;
- }
- /* Work around the dropped serial bit. */
- prev_eedata = eeprom_read(ioaddr, 6);
- for (i = 0; i < 3; i++) {
- int eedata = eeprom_read(ioaddr, i + 7);
- dev->dev_addr[i*2] = (eedata << 1) + (prev_eedata >> 15);
- dev->dev_addr[i*2+1] = eedata >> 7;
- prev_eedata = eedata;
- }
- dev->base_addr = ioaddr;
- dev->irq = irq;
- np = dev->priv;
- np->pci_dev = pdev;
- pci_set_drvdata(pdev, dev);
- np->iosize = iosize;
- spin_lock_init(&np->lock);
- np->msg_enable = debug;
- /* Reset the chip to erase previous misconfiguration. */
- natsemi_reload_eeprom(dev);
- natsemi_reset(dev);
- option = find_cnt < MAX_UNITS ? options[find_cnt] : 0;
- if (dev->mem_start)
- option = dev->mem_start;
- /* The lower four bits are the media type. */
- if (option > 0) {
- if (option & 0x200)
- np->full_duplex = 1;
- if (option & 15)
- printk(KERN_INFO
- "%s: ignoring user supplied media type %d",
- dev->name, option & 15);
- }
- if (find_cnt < MAX_UNITS && full_duplex[find_cnt] > 0)
- np->full_duplex = 1;
- /* The chip-specific entries in the device structure. */
- dev->open = &netdev_open;
- dev->hard_start_xmit = &start_tx;
- dev->stop = &netdev_close;
- dev->get_stats = &get_stats;
- dev->set_multicast_list = &set_rx_mode;
- dev->do_ioctl = &netdev_ioctl;
- dev->tx_timeout = &tx_timeout;
- dev->watchdog_timeo = TX_TIMEOUT;
- if (mtu)
- dev->mtu = mtu;
- i = register_netdev(dev);
- if (i) {
- pci_release_regions(pdev);
- unregister_netdev(dev);
- kfree(dev);
- pci_set_drvdata(pdev, NULL);
- return i;
- }
- netif_carrier_off(dev);
- if (netif_msg_drv(np)) {
- printk(KERN_INFO "%s: %s at %#08lx, ",
- dev->name, natsemi_pci_info[chip_idx].name, ioaddr);
- for (i = 0; i < ETH_ALEN-1; i++)
- printk("%02x:", dev->dev_addr[i]);
- printk("%02x, IRQ %d.n", dev->dev_addr[i], irq);
- }
- np->advertising = mdio_read(dev, 1, MII_ADVERTISE);
- if ((readl(ioaddr + ChipConfig) & 0xe000) != 0xe000
- && netif_msg_probe(np)) {
- u32 chip_config = readl(ioaddr + ChipConfig);
- printk(KERN_INFO "%s: Transceiver default autonegotiation %s "
- "10%s %s duplex.n",
- dev->name,
- chip_config & CfgAnegEnable ? "enabled, advertise" : "disabled, force",
- chip_config & CfgAneg100 ? "0" : "",
- chip_config & CfgAnegFull ? "full" : "half");
- }
- if (netif_msg_probe(np))
- printk(KERN_INFO
- "%s: Transceiver status %#04x advertising %#04x.n",
- dev->name, mdio_read(dev, 1, MII_BMSR),
- np->advertising);
- /* save the silicon revision for later querying */
- np->srr = readl(ioaddr + SiliconRev);
- if (netif_msg_hw(np))
- printk(KERN_INFO "%s: silicon revision %#04x.n",
- dev->name, np->srr);
- return 0;
- }
- /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
- The EEPROM code is for the common 93c06/46 EEPROMs with 6 bit addresses. */
- /* Delay between EEPROM clock transitions.
- No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need
- a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that
- made udelay() unreliable.
- The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is
- depricated.
- */
- #define eeprom_delay(ee_addr) readl(ee_addr)
- #define EE_Write0 (EE_ChipSelect)
- #define EE_Write1 (EE_ChipSelect | EE_DataIn)
- /* The EEPROM commands include the alway-set leading bit. */
- enum EEPROM_Cmds {
- EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
- };
- static int eeprom_read(long addr, int location)
- {
- int i;
- int retval = 0;
- long ee_addr = addr + EECtrl;
- int read_cmd = location | EE_ReadCmd;
- writel(EE_Write0, ee_addr);
- /* Shift the read command bits out. */
- for (i = 10; i >= 0; i--) {
- short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
- writel(dataval, ee_addr);
- eeprom_delay(ee_addr);
- writel(dataval | EE_ShiftClk, ee_addr);
- eeprom_delay(ee_addr);
- }
- writel(EE_ChipSelect, ee_addr);
- eeprom_delay(ee_addr);
- for (i = 0; i < 16; i++) {
- writel(EE_ChipSelect | EE_ShiftClk, ee_addr);
- eeprom_delay(ee_addr);
- retval |= (readl(ee_addr) & EE_DataOut) ? 1 << i : 0;
- writel(EE_ChipSelect, ee_addr);
- eeprom_delay(ee_addr);
- }
- /* Terminate the EEPROM access. */
- writel(EE_Write0, ee_addr);
- writel(0, ee_addr);
- return retval;
- }
- /* MII transceiver control section.
- The 83815 series has an internal transceiver, and we present the
- management registers as if they were MII connected. */
- static int mdio_read(struct net_device *dev, int phy_id, int reg)
- {
- if (phy_id == 1 && reg < 32)
- return readl(dev->base_addr+BasicControl+(reg<<2))&0xffff;
- else
- return 0xffff;
- }
- static void mdio_write(struct net_device *dev, int phy_id, int reg, u16 data)
- {
- struct netdev_private *np = dev->priv;
- if (phy_id == 1 && reg < 32) {
- writew(data, dev->base_addr+BasicControl+(reg<<2));
- switch (reg) {
- case MII_ADVERTISE: np->advertising = data; break;
- }
- }
- }
- /* CFG bits [13:16] [18:23] */
- #define CFG_RESET_SAVE 0xfde000
- /* WCSR bits [0:4] [9:10] */
- #define WCSR_RESET_SAVE 0x61f
- /* RFCR bits [20] [22] [27:31] */
- #define RFCR_RESET_SAVE 0xf8500000;
- static void natsemi_reset(struct net_device *dev)
- {
- int i;
- u32 cfg;
- u32 wcsr;
- u32 rfcr;
- u16 pmatch[3];
- u16 sopass[3];
- struct netdev_private *np = dev->priv;
- /*
- * Resetting the chip causes some registers to be lost.
- * Natsemi suggests NOT reloading the EEPROM while live, so instead
- * we save the state that would have been loaded from EEPROM
- * on a normal power-up (see the spec EEPROM map). This assumes
- * whoever calls this will follow up with init_registers() eventually.
- */
- /* CFG */
- cfg = readl(dev->base_addr + ChipConfig) & CFG_RESET_SAVE;
- /* WCSR */
- wcsr = readl(dev->base_addr + WOLCmd) & WCSR_RESET_SAVE;
- /* RFCR */
- rfcr = readl(dev->base_addr + RxFilterAddr) & RFCR_RESET_SAVE;
- /* PMATCH */
- for (i = 0; i < 3; i++) {
- writel(i*2, dev->base_addr + RxFilterAddr);
- pmatch[i] = readw(dev->base_addr + RxFilterData);
- }
- /* SOPAS */
- for (i = 0; i < 3; i++) {
- writel(0xa+(i*2), dev->base_addr + RxFilterAddr);
- sopass[i] = readw(dev->base_addr + RxFilterData);
- }
- /* now whack the chip */
- writel(ChipReset, dev->base_addr + ChipCmd);
- for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
- if (!(readl(dev->base_addr + ChipCmd) & ChipReset))
- break;
- udelay(5);
- }
- if (i==NATSEMI_HW_TIMEOUT && netif_msg_hw(np)) {
- printk(KERN_INFO "%s: reset did not complete in %d usec.n",
- dev->name, i*5);
- } else if (netif_msg_hw(np)) {
- printk(KERN_DEBUG "%s: reset completed in %d usec.n",
- dev->name, i*5);
- }
- /* restore CFG */
- cfg |= readl(dev->base_addr + ChipConfig) & ~CFG_RESET_SAVE;
- writel(cfg, dev->base_addr + ChipConfig);
- /* restore WCSR */
- wcsr |= readl(dev->base_addr + WOLCmd) & ~WCSR_RESET_SAVE;
- writel(wcsr, dev->base_addr + WOLCmd);
- /* read RFCR */
- rfcr |= readl(dev->base_addr + RxFilterAddr) & ~RFCR_RESET_SAVE;
- /* restore PMATCH */
- for (i = 0; i < 3; i++) {
- writel(i*2, dev->base_addr + RxFilterAddr);
- writew(pmatch[i], dev->base_addr + RxFilterData);
- }
- for (i = 0; i < 3; i++) {
- writel(0xa+(i*2), dev->base_addr + RxFilterAddr);
- writew(sopass[i], dev->base_addr + RxFilterData);
- }
- /* restore RFCR */
- writel(rfcr, dev->base_addr + RxFilterAddr);
-
- }
- static void natsemi_reload_eeprom(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- int i;
- writel(EepromReload, dev->base_addr + PCIBusCfg);
- for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
- if (!(readl(dev->base_addr + PCIBusCfg) & EepromReload))
- break;
- udelay(5);
- }
- if (i==NATSEMI_HW_TIMEOUT && netif_msg_hw(np)) {
- printk(KERN_INFO "%s: EEPROM did not reload in %d usec.n",
- dev->name, i*5);
- } else if (netif_msg_hw(np)) {
- printk(KERN_DEBUG "%s: EEPROM reloaded in %d usec.n",
- dev->name, i*5);
- }
- }
- static void natsemi_stop_rxtx(struct net_device *dev)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- int i;
- writel(RxOff | TxOff, ioaddr + ChipCmd);
- for(i=0;i< NATSEMI_HW_TIMEOUT;i++) {
- if ((readl(ioaddr + ChipCmd) & (TxOn|RxOn)) == 0)
- break;
- udelay(5);
- }
- if (i==NATSEMI_HW_TIMEOUT && netif_msg_hw(np)) {
- printk(KERN_INFO "%s: Tx/Rx process did not stop in %d usec.n",
- dev->name, i*5);
- } else if (netif_msg_hw(np)) {
- printk(KERN_DEBUG "%s: Tx/Rx process stopped in %d usec.n",
- dev->name, i*5);
- }
- }
- static int netdev_open(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int i;
- /* Reset the chip, just in case. */
- natsemi_reset(dev);
- i = request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev);
- if (i) return i;
- if (netif_msg_ifup(np))
- printk(KERN_DEBUG "%s: netdev_open() irq %d.n",
- dev->name, dev->irq);
- i = alloc_ring(dev);
- if (i < 0) {
- free_irq(dev->irq, dev);
- return i;
- }
- init_ring(dev);
- spin_lock_irq(&np->lock);
- init_registers(dev);
- spin_unlock_irq(&np->lock);
- netif_start_queue(dev);
- if (netif_msg_ifup(np))
- printk(KERN_DEBUG "%s: Done netdev_open(), status: %#08x.n",
- dev->name, (int)readl(ioaddr + ChipCmd));
- /* Set the timer to check for link beat. */
- init_timer(&np->timer);
- np->timer.expires = jiffies + NATSEMI_TIMER_FREQ;
- np->timer.data = (unsigned long)dev;
- np->timer.function = &netdev_timer; /* timer handler */
- add_timer(&np->timer);
- return 0;
- }
- static void check_link(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int duplex;
- int chipcfg = readl(ioaddr + ChipConfig);
- if (!(chipcfg & CfgLink)) {
- if (netif_carrier_ok(dev)) {
- if (netif_msg_link(np))
- printk(KERN_NOTICE "%s: link down.n",
- dev->name);
- netif_carrier_off(dev);
- }
- return;
- }
- if (!netif_carrier_ok(dev)) {
- if (netif_msg_link(np))
- printk(KERN_NOTICE "%s: link up.n", dev->name);
- netif_carrier_on(dev);
- }
- duplex = np->full_duplex || (chipcfg & CfgFullDuplex ? 1 : 0);
- /* if duplex is set then bit 28 must be set, too */
- if (duplex ^ !!(np->rx_config & RxAcceptTx)) {
- if (netif_msg_link(np))
- printk(KERN_INFO
- "%s: Setting %s-duplex based on negotiated "
- "link capability.n", dev->name,
- duplex ? "full" : "half");
- if (duplex) {
- np->rx_config |= RxAcceptTx;
- np->tx_config |= TxCarrierIgn | TxHeartIgn;
- } else {
- np->rx_config &= ~RxAcceptTx;
- np->tx_config &= ~(TxCarrierIgn | TxHeartIgn);
- }
- writel(np->tx_config, ioaddr + TxConfig);
- writel(np->rx_config, ioaddr + RxConfig);
- }
- }
- static void init_registers(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int i;
- for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
- if (readl(dev->base_addr + ChipConfig) & CfgAnegDone)
- break;
- udelay(10);
- }
- if (i==NATSEMI_HW_TIMEOUT && netif_msg_link(np)) {
- printk(KERN_INFO
- "%s: autonegotiation did not complete in %d usec.n",
- dev->name, i*10);
- }
- /* On page 78 of the spec, they recommend some settings for "optimum
- performance" to be done in sequence. These settings optimize some
- of the 100Mbit autodetection circuitry. They say we only want to
- do this for rev C of the chip, but engineers at NSC (Bradley
- Kennedy) recommends always setting them. If you don't, you get
- errors on some autonegotiations that make the device unusable.
- */
- writew(1, ioaddr + PGSEL);
- writew(PMDCSR_VAL, ioaddr + PMDCSR);
- writew(TSTDAT_VAL, ioaddr + TSTDAT);
- writew(DSPCFG_VAL, ioaddr + DSPCFG);
- writew(SDCFG_VAL, ioaddr + SDCFG);
- writew(0, ioaddr + PGSEL);
- /* Enable PHY Specific event based interrupts. Link state change
- and Auto-Negotiation Completion are among the affected.
- Read the intr status to clear it (needed for wake events).
- */
- readw(ioaddr + MIntrStatus);
- writew(MICRIntEn, ioaddr + MIntrCtrl);
- /* clear any interrupts that are pending, such as wake events */
- readl(ioaddr + IntrStatus);
- writel(np->ring_dma, ioaddr + RxRingPtr);
- writel(np->ring_dma + RX_RING_SIZE * sizeof(struct netdev_desc),
- ioaddr + TxRingPtr);
- /* Initialize other registers.
- * Configure the PCI bus bursts and FIFO thresholds.
- * Configure for standard, in-spec Ethernet.
- * Start with half-duplex. check_link will update
- * to the correct settings.
- */
- /* DRTH: 2: start tx if 64 bytes are in the fifo
- * FLTH: 0x10: refill with next packet if 512 bytes are free
- * MXDMA: 0: up to 256 byte bursts.
- * MXDMA must be <= FLTH
- * ECRETRY=1
- * ATP=1
- */
- np->tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 | (0x1002);
- writel(np->tx_config, ioaddr + TxConfig);
- /* DRTH 0x10: start copying to memory if 128 bytes are in the fifo
- * MXDMA 0: up to 256 byte bursts
- */
- np->rx_config = RxMxdma_256 | 0x20;
- writel(np->rx_config, ioaddr + RxConfig);
- /* Disable PME:
- * The PME bit is initialized from the EEPROM contents.
- * PCI cards probably have PME disabled, but motherboard
- * implementations may have PME set to enable WakeOnLan.
- * With PME set the chip will scan incoming packets but
- * nothing will be written to memory. */
- np->SavedClkRun = readl(ioaddr + ClkRun);
- writel(np->SavedClkRun & ~PMEEnable, ioaddr + ClkRun);
- if (np->SavedClkRun & PMEStatus && netif_msg_wol(np)) {
- printk(KERN_NOTICE "%s: Wake-up event %#08xn",
- dev->name, readl(ioaddr + WOLCmd));
- }
- check_link(dev);
- __set_rx_mode(dev);
- /* Enable interrupts by setting the interrupt mask. */
- writel(DEFAULT_INTR, ioaddr + IntrMask);
- writel(1, ioaddr + IntrEnable);
- writel(RxOn | TxOn, ioaddr + ChipCmd);
- writel(StatsClear, ioaddr + StatsCtrl); /* Clear Stats */
- }
- /*
- * The frequency on this has been increased because of a nasty little problem.
- * It seems that a reference set for this chip went out with incorrect info,
- * and there exist boards that aren't quite right. An unexpected voltage drop
- * can cause the PHY to get itself in a weird state (basically reset..).
- * NOTE: this only seems to affect revC chips.
- */
- static void netdev_timer(unsigned long data)
- {
- struct net_device *dev = (struct net_device *)data;
- struct netdev_private *np = dev->priv;
- int next_tick = 5*HZ;
- long ioaddr = dev->base_addr;
- u16 dspcfg;
- if (netif_msg_timer(np)) {
- /* DO NOT read the IntrStatus register,
- * a read clears any pending interrupts.
- */
- printk(KERN_DEBUG "%s: Media selection timer tick.n",
- dev->name);
- }
- /* check for a nasty random phy-reset - use dspcfg as a flag */
- writew(1, ioaddr+PGSEL);
- dspcfg = readw(ioaddr+DSPCFG);
- writew(0, ioaddr+PGSEL);
- if (dspcfg != DSPCFG_VAL) {
- if (!netif_queue_stopped(dev)) {
- if (netif_msg_hw(np))
- printk(KERN_NOTICE "%s: possible phy reset: "
- "re-initializingn", dev->name);
- disable_irq(dev->irq);
- spin_lock_irq(&np->lock);
- init_registers(dev);
- spin_unlock_irq(&np->lock);
- enable_irq(dev->irq);
- } else {
- /* hurry back */
- next_tick = HZ;
- }
- } else {
- /* init_registers() calls check_link() for the above case */
- spin_lock_irq(&np->lock);
- check_link(dev);
- spin_unlock_irq(&np->lock);
- }
- mod_timer(&np->timer, jiffies + next_tick);
- }
- static void dump_ring(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- if (netif_msg_pktdata(np)) {
- int i;
- printk(KERN_DEBUG " Tx ring at %p:n", np->tx_ring);
- for (i = 0; i < TX_RING_SIZE; i++) {
- printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.n",
- i, np->tx_ring[i].next_desc,
- np->tx_ring[i].cmd_status,
- np->tx_ring[i].addr);
- }
- printk(KERN_DEBUG " Rx ring %p:n", np->rx_ring);
- for (i = 0; i < RX_RING_SIZE; i++) {
- printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.n",
- i, np->rx_ring[i].next_desc,
- np->rx_ring[i].cmd_status,
- np->rx_ring[i].addr);
- }
- }
- }
- static void tx_timeout(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- disable_irq(dev->irq);
- spin_lock_irq(&np->lock);
- if (netif_device_present(dev)) {
- if (netif_msg_tx_err(np))
- printk(KERN_WARNING
- "%s: Transmit timed out, status %#08x,"
- " resetting...n",
- dev->name, readl(ioaddr + IntrStatus));
- dump_ring(dev);
- natsemi_reset(dev);
- drain_ring(dev);
- init_ring(dev);
- init_registers(dev);
- } else {
- printk(KERN_WARNING
- "%s: tx_timeout while in suspended state?n",
- dev->name);
- }
- spin_unlock_irq(&np->lock);
- enable_irq(dev->irq);
- dev->trans_start = jiffies;
- np->stats.tx_errors++;
- netif_wake_queue(dev);
- }
- static int alloc_ring(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- np->rx_ring = pci_alloc_consistent(np->pci_dev,
- sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
- &np->ring_dma);
- if (!np->rx_ring)
- return -ENOMEM;
- np->tx_ring = &np->rx_ring[RX_RING_SIZE];
- return 0;
- }
- /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
- static void init_ring(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- int i;
- np->cur_rx = np->cur_tx = 0;
- np->dirty_rx = np->dirty_tx = 0;
- np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
- np->rx_head_desc = &np->rx_ring[0];
- /* Please be carefull before changing this loop - at least gcc-2.95.1
- * miscompiles it otherwise.
- */
- /* Initialize all Rx descriptors. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- np->rx_ring[i].next_desc = cpu_to_le32(np->ring_dma
- +sizeof(struct netdev_desc)
- *((i+1)%RX_RING_SIZE));
- np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
- np->rx_skbuff[i] = NULL;
- }
- /* Fill in the Rx buffers. Handle allocation failure gracefully. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
- np->rx_skbuff[i] = skb;
- if (skb == NULL)
- break;
- skb->dev = dev; /* Mark as being used by this device. */
- np->rx_dma[i] = pci_map_single(np->pci_dev,
- skb->data, skb->len, PCI_DMA_FROMDEVICE);
- np->rx_ring[i].addr = cpu_to_le32(np->rx_dma[i]);
- np->rx_ring[i].cmd_status = cpu_to_le32(np->rx_buf_sz);
- }
- np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
- for (i = 0; i < TX_RING_SIZE; i++) {
- np->tx_skbuff[i] = NULL;
- np->tx_ring[i].next_desc = cpu_to_le32(np->ring_dma
- +sizeof(struct netdev_desc)
- *((i+1)%TX_RING_SIZE+RX_RING_SIZE));
- np->tx_ring[i].cmd_status = 0;
- }
- dump_ring(dev);
- }
- static void drain_ring(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- int i;
- /* Free all the skbuffs in the Rx queue. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- np->rx_ring[i].cmd_status = 0;
- np->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
- if (np->rx_skbuff[i]) {
- pci_unmap_single(np->pci_dev,
- np->rx_dma[i],
- np->rx_skbuff[i]->len,
- PCI_DMA_FROMDEVICE);
- dev_kfree_skb(np->rx_skbuff[i]);
- }
- np->rx_skbuff[i] = NULL;
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- if (np->tx_skbuff[i]) {
- pci_unmap_single(np->pci_dev,
- np->rx_dma[i],
- np->rx_skbuff[i]->len,
- PCI_DMA_TODEVICE);
- dev_kfree_skb(np->tx_skbuff[i]);
- }
- np->tx_skbuff[i] = NULL;
- }
- }
- static void free_ring(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- pci_free_consistent(np->pci_dev,
- sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
- np->rx_ring, np->ring_dma);
- }
- static int start_tx(struct sk_buff *skb, struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- unsigned entry;
- /* Note: Ordering is important here, set the field with the
- "ownership" bit last, and only then increment cur_tx. */
- /* Calculate the next Tx descriptor entry. */
- entry = np->cur_tx % TX_RING_SIZE;
- np->tx_skbuff[entry] = skb;
- np->tx_dma[entry] = pci_map_single(np->pci_dev,
- skb->data,skb->len, PCI_DMA_TODEVICE);
- np->tx_ring[entry].addr = cpu_to_le32(np->tx_dma[entry]);
- spin_lock_irq(&np->lock);
-
- if (netif_device_present(dev)) {
- np->tx_ring[entry].cmd_status = cpu_to_le32(DescOwn | skb->len);
- /* StrongARM: Explicitly cache flush np->tx_ring and
- * skb->data,skb->len. */
- wmb();
- np->cur_tx++;
- if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) {
- netdev_tx_done(dev);
- if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1)
- netif_stop_queue(dev);
- }
- /* Wake the potentially-idle transmit channel. */
- writel(TxOn, dev->base_addr + ChipCmd);
- } else {
- dev_kfree_skb_irq(skb);
- np->stats.tx_dropped++;
- }
- spin_unlock_irq(&np->lock);
- dev->trans_start = jiffies;
- if (netif_msg_tx_queued(np)) {
- printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.n",
- dev->name, np->cur_tx, entry);
- }
- return 0;
- }
- static void netdev_tx_done(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
- int entry = np->dirty_tx % TX_RING_SIZE;
- if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescOwn))
- break;
- if (netif_msg_tx_done(np))
- printk(KERN_DEBUG
- "%s: tx frame #%d finished, status %#08x.n",
- dev->name, np->dirty_tx,
- le32_to_cpu(np->tx_ring[entry].cmd_status));
- if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescPktOK)) {
- np->stats.tx_packets++;
- np->stats.tx_bytes += np->tx_skbuff[entry]->len;
- } else { /* Various Tx errors */
- int tx_status = le32_to_cpu(np->tx_ring[entry].cmd_status);
- if (tx_status & (DescTxAbort|DescTxExcColl))
- np->stats.tx_aborted_errors++;
- if (tx_status & DescTxFIFO)
- np->stats.tx_fifo_errors++;
- if (tx_status & DescTxCarrier)
- np->stats.tx_carrier_errors++;
- if (tx_status & DescTxOOWCol)
- np->stats.tx_window_errors++;
- np->stats.tx_errors++;
- }
- pci_unmap_single(np->pci_dev,np->tx_dma[entry],
- np->tx_skbuff[entry]->len,
- PCI_DMA_TODEVICE);
- /* Free the original skb. */
- dev_kfree_skb_irq(np->tx_skbuff[entry]);
- np->tx_skbuff[entry] = NULL;
- }
- if (netif_queue_stopped(dev)
- && np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
- /* The ring is no longer full, wake queue. */
- netif_wake_queue(dev);
- }
- }
- /* The interrupt handler does all of the Rx thread work and cleans up
- after the Tx thread. */
- static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
- {
- struct net_device *dev = dev_instance;
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int boguscnt = max_interrupt_work;
- if (!netif_device_present(dev))
- return;
- do {
- /* Reading automatically acknowledges all int sources. */
- u32 intr_status = readl(ioaddr + IntrStatus);
- if (netif_msg_intr(np))
- printk(KERN_DEBUG "%s: Interrupt, status %#08x.n",
- dev->name, intr_status);
- if (intr_status == 0)
- break;
- if (intr_status & (IntrRxDone | IntrRxIntr))
- netdev_rx(dev);
- if (intr_status & (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr) ) {
- spin_lock(&np->lock);
- netdev_tx_done(dev);
- spin_unlock(&np->lock);
- }
- /* Abnormal error summary/uncommon events handlers. */
- if (intr_status & IntrAbnormalSummary)
- netdev_error(dev, intr_status);
- if (--boguscnt < 0) {
- printk(KERN_WARNING "%s: Too much work at interrupt, "
- "status=%#08x.n",
- dev->name, intr_status);
- break;
- }
- } while (1);
- if (netif_msg_intr(np))
- printk(KERN_DEBUG "%s: exiting interrupt.n",
- dev->name);
- }
- /* This routine is logically part of the interrupt handler, but separated
- for clarity and better register allocation. */
- static void netdev_rx(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- int entry = np->cur_rx % RX_RING_SIZE;
- int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
- s32 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
- /* If the driver owns the next entry it's a new packet. Send it up. */
- while (desc_status < 0) { /* e.g. & DescOwn */
- if (netif_msg_rx_status(np))
- printk(KERN_DEBUG
- " netdev_rx() entry %d status was %#08x.n",
- entry, desc_status);
- if (--boguscnt < 0)
- break;
- if ((desc_status&(DescMore|DescPktOK|DescRxLong)) != DescPktOK){
- if (desc_status & DescMore) {
- if (netif_msg_rx_err(np))
- printk(KERN_WARNING
- "%s: Oversized(?) Ethernet "
- "frame spanned multiple "
- "buffers, entry %#08x "
- "status %#08x.n", dev->name,
- np->cur_rx, desc_status);
- np->stats.rx_length_errors++;
- } else {
- /* There was an error. */
- np->stats.rx_errors++;
- if (desc_status & (DescRxAbort|DescRxOver))
- np->stats.rx_over_errors++;
- if (desc_status & (DescRxLong|DescRxRunt))
- np->stats.rx_length_errors++;
- if (desc_status & (DescRxInvalid|DescRxAlign))
- np->stats.rx_frame_errors++;
- if (desc_status & DescRxCRC)
- np->stats.rx_crc_errors++;
- }
- } else {
- struct sk_buff *skb;
- /* Omit CRC size. */
- int pkt_len = (desc_status & DescSizeMask) - 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(np->pci_dev, np->rx_dma[entry],
- np->rx_skbuff[entry]->len,
- PCI_DMA_FROMDEVICE);
- #if HAS_IP_COPYSUM
- eth_copy_and_sum(skb, np->rx_skbuff[entry]->tail, pkt_len, 0);
- skb_put(skb, pkt_len);
- #else
- memcpy(skb_put(skb, pkt_len), np->rx_skbuff[entry]->tail,
- pkt_len);
- #endif
- } else {
- pci_unmap_single(np->pci_dev, np->rx_dma[entry],
- np->rx_skbuff[entry]->len,
- PCI_DMA_FROMDEVICE);
- skb_put(skb = np->rx_skbuff[entry], pkt_len);
- np->rx_skbuff[entry] = NULL;
- }
- skb->protocol = eth_type_trans(skb, dev);
- /* W/ hardware checksum: skb->ip_summed = CHECKSUM_UNNECESSARY; */
- netif_rx(skb);
- dev->last_rx = jiffies;
- np->stats.rx_packets++;
- np->stats.rx_bytes += pkt_len;
- }
- entry = (++np->cur_rx) % RX_RING_SIZE;
- np->rx_head_desc = &np->rx_ring[entry];
- desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
- }
- /* Refill the Rx ring buffers. */
- for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
- struct sk_buff *skb;
- entry = np->dirty_rx % RX_RING_SIZE;
- if (np->rx_skbuff[entry] == NULL) {
- skb = dev_alloc_skb(np->rx_buf_sz);
- np->rx_skbuff[entry] = skb;
- if (skb == NULL)
- break; /* Better luck next round. */
- skb->dev = dev; /* Mark as being used by this device. */
- np->rx_dma[entry] = pci_map_single(np->pci_dev,
- skb->data, skb->len, PCI_DMA_FROMDEVICE);
- np->rx_ring[entry].addr = cpu_to_le32(np->rx_dma[entry]);
- }
- np->rx_ring[entry].cmd_status =
- cpu_to_le32(np->rx_buf_sz);
- }
- /* Restart Rx engine if stopped. */
- writel(RxOn, dev->base_addr + ChipCmd);
- }
- static void netdev_error(struct net_device *dev, int intr_status)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- spin_lock(&np->lock);
- if (intr_status & LinkChange) {
- u16 adv = mdio_read(dev, 1, MII_ADVERTISE);
- u16 lpa = mdio_read(dev, 1, MII_LPA);
- if (mdio_read(dev, 1, MII_BMCR) & BMCR_ANENABLE
- && netif_msg_link(np)) {
- printk(KERN_INFO
- "%s: Autonegotiation advertising"
- " %#04x partner %#04x.n", dev->name,
- adv, lpa);
- }
- /* read MII int status to clear the flag */
- readw(ioaddr + MIntrStatus);
- check_link(dev);
- }
- if (intr_status & StatsMax) {
- __get_stats(dev);
- }
- if (intr_status & IntrTxUnderrun) {
- if ((np->tx_config & TxDrthMask) < 62)
- np->tx_config += 2;
- if (netif_msg_tx_err(np))
- printk(KERN_NOTICE
- "%s: increased Tx theshold, txcfg %#08x.n",
- dev->name, np->tx_config);
- writel(np->tx_config, ioaddr + TxConfig);
- }
- if (intr_status & WOLPkt && netif_msg_wol(np)) {
- int wol_status = readl(ioaddr + WOLCmd);
- printk(KERN_NOTICE "%s: Link wake-up event %#08xn",
- dev->name, wol_status);
- }
- if (intr_status & RxStatusFIFOOver) {
- if (netif_msg_rx_err(np) && netif_msg_intr(np)) {
- printk(KERN_NOTICE "%s: Rx status FIFO overrunn",
- dev->name);
- }
- np->stats.rx_fifo_errors++;
- }
- /* Hmmmmm, it's not clear how to recover from PCI faults. */
- if (intr_status & IntrPCIErr) {
- printk(KERN_NOTICE "%s: PCI error %#08xn", dev->name,
- intr_status & IntrPCIErr);
- np->stats.tx_fifo_errors++;
- np->stats.rx_fifo_errors++;
- }
- spin_unlock(&np->lock);
- }
- static void __get_stats(struct net_device *dev)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- /* The chip only need report frame silently dropped. */
- np->stats.rx_crc_errors += readl(ioaddr + RxCRCErrs);
- np->stats.rx_missed_errors += readl(ioaddr + RxMissed);
- }
- static struct net_device_stats *get_stats(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- /* The chip only need report frame silently dropped. */
- spin_lock_irq(&np->lock);
- if (netif_running(dev) && netif_device_present(dev))
- __get_stats(dev);
- spin_unlock_irq(&np->lock);
- return &np->stats;
- }
- /* The little-endian AUTODIN II ethernet CRC calculations.
- A big-endian version is also available.
- This is slow but compact code. Do not use this routine for bulk data,
- use a table-based routine instead.
- This is common code and should be moved to net/core/crc.c.
- Chips may use the upper or lower CRC bits, and may reverse and/or invert
- them. Select the endian-ness that results in minimal calculations.
- */
- #if 0
- static unsigned const ethernet_polynomial_le = 0xedb88320U;
- static inline unsigned ether_crc_le(int length, unsigned char *data)
- {
- unsigned int crc = 0xffffffff; /* Initial value. */
- while(--length >= 0) {
- unsigned char current_octet = *data++;
- int bit;
- for (bit = 8; --bit >= 0; current_octet >>= 1) {
- if ((crc ^ current_octet) & 1) {
- crc >>= 1;
- crc ^= ethernet_polynomial_le;
- } else
- crc >>= 1;
- }
- }
- return crc;
- }
- #else
- #define DP_POLYNOMIAL 0x04C11DB7
- /* dp83815_crc - computer CRC for hash table entries */
- static unsigned ether_crc_le(int length, unsigned char *data)
- {
- u32 crc;
- u8 cur_byte;
- u8 msb;
- u8 byte, bit;
- crc = ~0;
- for (byte=0; byte<length; byte++) {
- cur_byte = *data++;
- for (bit=0; bit<8; bit++) {
- msb = crc >> 31;
- crc <<= 1;
- if (msb ^ (cur_byte & 1)) {
- crc ^= DP_POLYNOMIAL;
- crc |= 1;
- }
- cur_byte >>= 1;
- }
- }
- crc >>= 23;
- return (crc);
- }
- #endif
- void set_bit_le(int offset, unsigned char * data)
- {
- data[offset >> 3] |= (1 << (offset & 0x07));
- }
- #define HASH_TABLE 0x200
- static void __set_rx_mode(struct net_device *dev)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- u8 mc_filter[64]; /* Multicast hash filter */
- u32 rx_mode;
- if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
- /* Unconditionally log net taps. */
- printk(KERN_NOTICE "%s: Promiscuous mode enabled.n",
- dev->name);
- rx_mode = RxFilterEnable | AcceptBroadcast
- | AcceptAllMulticast | AcceptAllPhys | AcceptMyPhys;
- } else if ((dev->mc_count > multicast_filter_limit)
- || (dev->flags & IFF_ALLMULTI)) {
- rx_mode = RxFilterEnable | AcceptBroadcast
- | AcceptAllMulticast | AcceptMyPhys;
- } 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) {
- set_bit_le(ether_crc_le(ETH_ALEN, mclist->dmi_addr) & 0x1ff,
- mc_filter);
- }
- rx_mode = RxFilterEnable | AcceptBroadcast
- | AcceptMulticast | AcceptMyPhys;
- for (i = 0; i < 64; i += 2) {
- writew(HASH_TABLE + i, ioaddr + RxFilterAddr);
- writew((mc_filter[i+1]<<8) + mc_filter[i],
- ioaddr + RxFilterData);
- }
- }
- writel(rx_mode, ioaddr + RxFilterAddr);
- np->cur_rx_mode = rx_mode;
- }
- static void set_rx_mode(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- spin_lock_irq(&np->lock);
- if (netif_device_present(dev))
- __set_rx_mode(dev);
- spin_unlock_irq(&np->lock);
- }
- static int netdev_ethtool_ioctl(struct net_device *dev, void *useraddr)
- {
- struct netdev_private *np = dev->priv;
- u32 cmd;
-
- if (get_user(cmd, (u32 *)useraddr))
- return -EFAULT;
- switch (cmd) {
- /* get driver info */
- case ETHTOOL_GDRVINFO: {
- struct ethtool_drvinfo info = {ETHTOOL_GDRVINFO};
- strncpy(info.driver, DRV_NAME, ETHTOOL_BUSINFO_LEN);
- strncpy(info.version, DRV_VERSION, ETHTOOL_BUSINFO_LEN);
- info.fw_version[0] = ' ';
- strncpy(info.bus_info, np->pci_dev->slot_name,
- ETHTOOL_BUSINFO_LEN);
- info.eedump_len = NATSEMI_EEPROM_SIZE;
- info.regdump_len = NATSEMI_REGS_SIZE;
- if (copy_to_user(useraddr, &info, sizeof(info)))
- return -EFAULT;
- return 0;
- }
- /* get settings */
- case ETHTOOL_GSET: {
- struct ethtool_cmd ecmd = { ETHTOOL_GSET };
- spin_lock_irq(&np->lock);
- netdev_get_ecmd(dev, &ecmd);
- spin_unlock_irq(&np->lock);
- if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
- return -EFAULT;
- return 0;
- }
- /* set settings */
- case ETHTOOL_SSET: {
- struct ethtool_cmd ecmd;
- int r;
- if (copy_from_user(&ecmd, useraddr, sizeof(ecmd)))
- return -EFAULT;
- spin_lock_irq(&np->lock);
- r = netdev_set_ecmd(dev, &ecmd);
- spin_unlock_irq(&np->lock);
- return r;
- }
- /* get wake-on-lan */
- case ETHTOOL_GWOL: {
- struct ethtool_wolinfo wol = {ETHTOOL_GWOL};
- spin_lock_irq(&np->lock);
- netdev_get_wol(dev, &wol.supported, &wol.wolopts);
- netdev_get_sopass(dev, wol.sopass);
- spin_unlock_irq(&np->lock);
- if (copy_to_user(useraddr, &wol, sizeof(wol)))
- return -EFAULT;
- return 0;
- }
- /* set wake-on-lan */
- case ETHTOOL_SWOL: {
- struct ethtool_wolinfo wol;
- int r;
- if (copy_from_user(&wol, useraddr, sizeof(wol)))
- return -EFAULT;
- spin_lock_irq(&np->lock);
- netdev_set_wol(dev, wol.wolopts);
- r = netdev_set_sopass(dev, wol.sopass);
- spin_unlock_irq(&np->lock);
- return r;
- }
- /* get registers */
- case ETHTOOL_GREGS: {
- struct ethtool_regs regs;
- u8 regbuf[NATSEMI_REGS_SIZE];
- int r;
- if (copy_from_user(®s, useraddr, sizeof(regs)))
- return -EFAULT;
-
- if (regs.len > NATSEMI_REGS_SIZE) {
- regs.len = NATSEMI_REGS_SIZE;
- }
- regs.version = NATSEMI_REGS_VER;
- if (copy_to_user(useraddr, ®s, sizeof(regs)))
- return -EFAULT;
- useraddr += offsetof(struct ethtool_regs, data);
- spin_lock_irq(&np->lock);
- r = netdev_get_regs(dev, regbuf);
- spin_unlock_irq(&np->lock);
- if (r)
- return r;
- if (copy_to_user(useraddr, regbuf, regs.len))
- return -EFAULT;
- return 0;
- }
- /* get message-level */
- case ETHTOOL_GMSGLVL: {
- struct ethtool_value edata = {ETHTOOL_GMSGLVL};
- edata.data = np->msg_enable;
- if (copy_to_user(useraddr, &edata, sizeof(edata)))
- return -EFAULT;
- return 0;
- }
- /* set message-level */
- case ETHTOOL_SMSGLVL: {
- struct ethtool_value edata;
- if (copy_from_user(&edata, useraddr, sizeof(edata)))
- return -EFAULT;
- np->msg_enable = edata.data;
- return 0;
- }
- /* restart autonegotiation */
- case ETHTOOL_NWAY_RST: {
- int tmp;
- int r = -EINVAL;
- /* if autoneg is off, it's an error */
- tmp = mdio_read(dev, 1, MII_BMCR);
- if (tmp & BMCR_ANENABLE) {
- tmp |= (BMCR_ANRESTART);
- mdio_write(dev, 1, MII_BMCR, tmp);
- r = 0;
- }
- return r;
- }
- /* get link status */
- case ETHTOOL_GLINK: {
- struct ethtool_value edata = {ETHTOOL_GLINK};
- edata.data = (mdio_read(dev, 1, MII_BMSR)&BMSR_LSTATUS) ? 1:0;
- if (copy_to_user(useraddr, &edata, sizeof(edata)))
- return -EFAULT;
- return 0;
- }
- /* get EEPROM */
- case ETHTOOL_GEEPROM: {
- struct ethtool_eeprom eeprom;
- u8 eebuf[NATSEMI_EEPROM_SIZE];
- int r;
- if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
- return -EFAULT;
-
- if ((eeprom.offset+eeprom.len) > NATSEMI_EEPROM_SIZE) {
- eeprom.len = NATSEMI_EEPROM_SIZE-eeprom.offset;
- }
- eeprom.magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16);
- if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
- return -EFAULT;
- useraddr += offsetof(struct ethtool_eeprom, data);
- spin_lock_irq(&np->lock);
- r = netdev_get_eeprom(dev, eebuf);
- spin_unlock_irq(&np->lock);
- if (r)
- return r;
- if (copy_to_user(useraddr, eebuf+eeprom.offset, eeprom.len))
- return -EFAULT;
- return 0;
- }
- }
-
- return -EOPNOTSUPP;
- }
- static int netdev_set_wol(struct net_device *dev, u32 newval)
- {
- struct netdev_private *np = dev->priv;
- u32 data = readl(dev->base_addr + WOLCmd) & ~WakeOptsSummary;
- /* translate to bitmasks this chip understands */
- if (newval & WAKE_PHY)
- data |= WakePhy;
- if (newval & WAKE_UCAST)
- data |= WakeUnicast;
- if (newval & WAKE_MCAST)
- data |= WakeMulticast;
- if (newval & WAKE_BCAST)
- data |= WakeBroadcast;
- if (newval & WAKE_ARP)
- data |= WakeArp;
- if (newval & WAKE_MAGIC)
- data |= WakeMagic;
- if (np->srr >= SRR_REV_D) {
- if (newval & WAKE_MAGICSECURE) {
- data |= WakeMagicSecure;
- }
- }
- writel(data, dev->base_addr + WOLCmd);
- return 0;
- }
- static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur)
- {
- struct netdev_private *np = dev->priv;
- u32 regval = readl(dev->base_addr + WOLCmd);
- *supported = (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST
- | WAKE_ARP | WAKE_MAGIC);
-
- if (np->srr >= SRR_REV_D) {
- /* SOPASS works on revD and higher */
- *supported |= WAKE_MAGICSECURE;
- }
- *cur = 0;
- /* translate from chip bitmasks */
- if (regval & WakePhy)
- *cur |= WAKE_PHY;
- if (regval & WakeUnicast)
- *cur |= WAKE_UCAST;
- if (regval & WakeMulticast)
- *cur |= WAKE_MCAST;
- if (regval & WakeBroadcast)
- *cur |= WAKE_BCAST;
- if (regval & WakeArp)
- *cur |= WAKE_ARP;
- if (regval & WakeMagic)
- *cur |= WAKE_MAGIC;
- if (regval & WakeMagicSecure) {
- /* this can be on in revC, but it's broken */
- *cur |= WAKE_MAGICSECURE;
- }
- return 0;
- }
- static int netdev_set_sopass(struct net_device *dev, u8 *newval)
- {
- struct netdev_private *np = dev->priv;
- u16 *sval = (u16 *)newval;
- u32 addr;
-
- if (np->srr < SRR_REV_D) {
- return 0;
- }
- /* enable writing to these registers by disabling the RX filter */
- addr = readl(dev->base_addr + RxFilterAddr) & ~RFCRAddressMask;
- addr &= ~RxFilterEnable;
- writel(addr, dev->base_addr + RxFilterAddr);
- /* write the three words to (undocumented) RFCR vals 0xa, 0xc, 0xe */
- writel(addr | 0xa, dev->base_addr + RxFilterAddr);
- writew(sval[0], dev->base_addr + RxFilterData);
- writel(addr | 0xc, dev->base_addr + RxFilterAddr);
- writew(sval[1], dev->base_addr + RxFilterData);
-
- writel(addr | 0xe, dev->base_addr + RxFilterAddr);
- writew(sval[2], dev->base_addr + RxFilterData);
-
- /* re-enable the RX filter */
- writel(addr | RxFilterEnable, dev->base_addr + RxFilterAddr);
- return 0;
- }
- static int netdev_get_sopass(struct net_device *dev, u8 *data)
- {
- struct netdev_private *np = dev->priv;
- u16 *sval = (u16 *)data;
- u32 addr;
- if (np->srr < SRR_REV_D) {
- sval[0] = sval[1] = sval[2] = 0;
- return 0;
- }
- /* read the three words from (undocumented) RFCR vals 0xa, 0xc, 0xe */
- addr = readl(dev->base_addr + RxFilterAddr) & ~RFCRAddressMask;
- writel(addr | 0xa, dev->base_addr + RxFilterAddr);
- sval[0] = readw(dev->base_addr + RxFilterData);
- writel(addr | 0xc, dev->base_addr + RxFilterAddr);
- sval[1] = readw(dev->base_addr + RxFilterData);
-
- writel(addr | 0xe, dev->base_addr + RxFilterAddr);
- sval[2] = readw(dev->base_addr + RxFilterData);
-
- writel(addr, dev->base_addr + RxFilterAddr);
- return 0;
- }
- static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
- {
- u32 tmp;
- ecmd->supported =
- (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
- SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
- SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
-
- /* only supports twisted-pair or MII */
- tmp = readl(dev->base_addr + ChipConfig);
- if (tmp & CfgExtPhy)
- ecmd->port = PORT_MII;
- else
- ecmd->port = PORT_TP;
- /* only supports internal transceiver */
- ecmd->transceiver = XCVR_INTERNAL;
- /* not sure what this is for */
- ecmd->phy_address = readw(dev->base_addr + PhyCtrl) & PhyAddrMask;
- ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
- tmp = mdio_read(dev, 1, MII_ADVERTISE);
- if (tmp & ADVERTISE_10HALF)
- ecmd->advertising |= ADVERTISED_10baseT_Half;
- if (tmp & ADVERTISE_10FULL)
- ecmd->advertising |= ADVERTISED_10baseT_Full;
- if (tmp & ADVERTISE_100HALF)
- ecmd->advertising |= ADVERTISED_100baseT_Half;
- if (tmp & ADVERTISE_100FULL)
- ecmd->advertising |= ADVERTISED_100baseT_Full;
- tmp = mdio_read(dev, 1, MII_BMCR);
- if (tmp & BMCR_ANENABLE) {
- ecmd->advertising |= ADVERTISED_Autoneg;
- ecmd->autoneg = AUTONEG_ENABLE;
- } else {
- ecmd->autoneg = AUTONEG_DISABLE;
- }
- tmp = readl(dev->base_addr + ChipConfig);
- if (tmp & CfgSpeed100) {
- ecmd->speed = SPEED_100;
- } else {
- ecmd->speed = SPEED_10;
- }
-
- if (tmp & CfgFullDuplex) {
- ecmd->duplex = DUPLEX_FULL;
- } else {
- ecmd->duplex = DUPLEX_HALF;
- }
- /* ignore maxtxpkt, maxrxpkt for now */
- return 0;
- }
- static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
- {
- struct netdev_private *np = dev->priv;
- u32 tmp;
- if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
- return -EINVAL;
- if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
- return -EINVAL;
- if (ecmd->port != PORT_TP && ecmd->port != PORT_MII)
- return -EINVAL;
- if (ecmd->transceiver != XCVR_INTERNAL)
- return -EINVAL;
- if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE)
- return -EINVAL;
- /* ignore phy_address, maxtxpkt, maxrxpkt for now */
-
- /* WHEW! now lets bang some bits */
-
- tmp = mdio_read(dev, 1, MII_BMCR);
- if (ecmd->autoneg == AUTONEG_ENABLE) {
- /* turn on autonegotiation */
- tmp |= BMCR_ANENABLE;
- np->advertising = mdio_read(dev, 1, MII_ADVERTISE);
- } else {
- /* turn off auto negotiation, set speed and duplexity */
- tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX);
- if (ecmd->speed == SPEED_100)
- tmp |= BMCR_SPEED100;
- if (ecmd->duplex == DUPLEX_FULL)
- tmp |= BMCR_FULLDPLX;
- else
- np->full_duplex = 0;
- }
- mdio_write(dev, 1, MII_BMCR, tmp);
- return 0;
- }
- static int netdev_get_regs(struct net_device *dev, u8 *buf)
- {
- int i;
- int j;
- u32 rfcr;
- u32 *rbuf = (u32 *)buf;
-
- /* read all of page 0 of registers */
- for (i = 0; i < NATSEMI_PG0_NREGS; i++) {
- rbuf[i] = readl(dev->base_addr + i*4);
- }
- /* read only the 'magic' registers from page 1 */
- writew(1, dev->base_addr + PGSEL);
- rbuf[i++] = readw(dev->base_addr + PMDCSR);
- rbuf[i++] = readw(dev->base_addr + TSTDAT);
- rbuf[i++] = readw(dev->base_addr + DSPCFG);
- rbuf[i++] = readw(dev->base_addr + SDCFG);
- writew(0, dev->base_addr + PGSEL);
- /* read RFCR indexed registers */
- rfcr = readl(dev->base_addr + RxFilterAddr);
- for (j = 0; j < NATSEMI_RFDR_NREGS; j++) {
- writel(j*2, dev->base_addr + RxFilterAddr);
- rbuf[i++] = readw(dev->base_addr + RxFilterData);
- }
- writel(rfcr, dev->base_addr + RxFilterAddr);
- /* the interrupt status is clear-on-read - see if we missed any */
- if (rbuf[4] & rbuf[5]) {
- printk(KERN_WARNING
- "%s: shoot, we dropped an interrupt (%#08x)n",
- dev->name, rbuf[4] & rbuf[5]);
- }
- return 0;
- }
- #define SWAP_BITS(x) ( (((x) & 0x0001) << 15) | (((x) & 0x0002) << 13)
- | (((x) & 0x0004) << 11) | (((x) & 0x0008) << 9)
- | (((x) & 0x0010) << 7) | (((x) & 0x0020) << 5)
- | (((x) & 0x0040) << 3) | (((x) & 0x0080) << 1)
- | (((x) & 0x0100) >> 1) | (((x) & 0x0200) >> 3)
- | (((x) & 0x0400) >> 5) | (((x) & 0x0800) >> 7)
- | (((x) & 0x1000) >> 9) | (((x) & 0x2000) >> 11)
- | (((x) & 0x4000) >> 13) | (((x) & 0x8000) >> 15) )
- static int netdev_get_eeprom(struct net_device *dev, u8 *buf)
- {
- int i;
- u16 *ebuf = (u16 *)buf;
- /* eeprom_read reads 16 bits, and indexes by 16 bits */
- for (i = 0; i < NATSEMI_EEPROM_SIZE/2; i++) {
- ebuf[i] = eeprom_read(dev->base_addr, i);
- /* The EEPROM itself stores data bit-swapped, but eeprom_read
- * reads it back "sanely". So we swap it back here in order to
- * present it to userland as it is stored. */
- ebuf[i] = SWAP_BITS(ebuf[i]);
- }
- return 0;
- }
- static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
- {
- struct mii_ioctl_data *data = (struct mii_ioctl_data *)&rq->ifr_data;
- switch(cmd) {
- case SIOCETHTOOL:
- return netdev_ethtool_ioctl(dev, (void *) rq->ifr_data);
- case SIOCGMIIPHY: /* Get address of MII PHY in use. */
- case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
- data->phy_id = 1;
- /* Fall Through */
- case SIOCGMIIREG: /* Read MII PHY register. */
- case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
- data->val_out = mdio_read(dev, data->phy_id & 0x1f,
- data->reg_num & 0x1f);
- return 0;
- case SIOCSMIIREG: /* Write MII PHY register. */
- case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- mdio_write(dev, data->phy_id & 0x1f, data->reg_num & 0x1f,
- data->val_in);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- }
- static void enable_wol_mode(struct net_device *dev, int enable_intr)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- if (netif_msg_wol(np))
- printk(KERN_INFO "%s: remaining active for wake-on-lann",
- dev->name);
- /* For WOL we must restart the rx process in silent mode.
- * Write NULL to the RxRingPtr. Only possible if
- * rx process is stopped
- */
- writel(0, ioaddr + RxRingPtr);
- /* read WoL status to clear */
- readl(ioaddr + WOLCmd);
- /* PME on, clear status */
- writel(np->SavedClkRun | PMEEnable | PMEStatus, ioaddr + ClkRun);
- /* and restart the rx process */
- writel(RxOn, ioaddr + ChipCmd);
- if (enable_intr) {
- /* enable the WOL interrupt.
- * Could be used to send a netlink message.
- */
- writel(readl(ioaddr + IntrMask) | WOLPkt, ioaddr + IntrMask);
- }
- }
- static int netdev_close(struct net_device *dev)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- netif_stop_queue(dev);
- netif_carrier_off(dev);
- if (netif_msg_ifdown(np))
- printk(KERN_DEBUG
- "%s: Shutting down ethercard, status was %#04x.n",
- dev->name, (int)readl(ioaddr + ChipCmd));
- if (netif_msg_pktdata(np))
- printk(KERN_DEBUG
- "%s: Queue pointers were Tx %d / %d, Rx %d / %d.n",
- dev->name, np->cur_tx, np->dirty_tx,
- np->cur_rx, np->dirty_rx);
- del_timer_sync(&np->timer);
- disable_irq(dev->irq);
- spin_lock_irq(&np->lock);
- /* Disable and clear interrupts */
- writel(0, ioaddr + IntrEnable);
- readl(ioaddr + IntrMask);
- readw(ioaddr + MIntrStatus);
- /* Freeze Stats */
- writel(StatsFreeze, ioaddr + StatsCtrl);
-
- /* Stop the chip's Tx and Rx processes. */
- natsemi_stop_rxtx(dev);
- __get_stats(dev);
- spin_unlock_irq(&np->lock);
- /* race: shared irq and as most nics the DP83815
- * reports _all_ interrupt conditions in IntrStatus, even
- * disabled ones.
- * packet received after disable_irq, but before stop_rxtx
- * --> race. intr_handler would restart the rx process.
- * netif_device_{de,a}tach around {enable,free}_irq.
- */
- netif_device_detach(dev);
- enable_irq(dev->irq);
- free_irq(dev->irq, dev);
- netif_device_attach(dev);
- /* clear the carrier last - an interrupt could reenable it otherwise */
- netif_carrier_off(dev);
- dump_ring(dev);
- drain_ring(dev);
- free_ring(dev);
- {
- u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
- if (wol) {
- /* restart the NIC in WOL mode.
- * The nic must be stopped for this.
- */
- enable_wol_mode(dev, 0);
- } else {
- /* Restore PME enable bit unmolested */
- writel(np->SavedClkRun, ioaddr + ClkRun);
- }
- }
- return 0;
- }
- static void __devexit natsemi_remove1 (struct pci_dev *pdev)
- {
- struct net_device *dev = pci_get_drvdata(pdev);
- unregister_netdev (dev);
- pci_release_regions (pdev);
- iounmap ((char *) dev->base_addr);
- kfree (dev);
- pci_set_drvdata(pdev, NULL);
- }
- #ifdef CONFIG_PM
- /*
- * suspend/resume synchronization:
- * entry points:
- * netdev_open, netdev_close, netdev_ioctl, set_rx_mode, intr_handler,
- * start_tx, tx_timeout
- * Reading from some registers can restart the nic!
- * No function accesses the hardware without checking netif_device_present().
- * the check occurs under spin_lock_irq(&np->lock);
- * exceptions:
- * * netdev_ioctl, netdev_open.
- * net/core checks netif_device_present() before calling them.
- * * netdev_close: doesn't hurt.
- * * netdev_timer: timer stopped by natsemi_suspend.
- * * intr_handler: doesn't acquire the spinlock. suspend calls
- * disable_irq() to enforce synchronization.
- *
- * netif_device_detach must occur under spin_unlock_irq(), interrupts from a
- * detached device would cause an irq storm.
- */
- static int natsemi_suspend (struct pci_dev *pdev, u32 state)
- {
- struct net_device *dev = pci_get_drvdata (pdev);
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- rtnl_lock();
- if (netif_running (dev)) {
- del_timer_sync(&np->timer);
- disable_irq(dev->irq);
- spin_lock_irq(&np->lock);
- writel(0, ioaddr + IntrEnable);
- natsemi_stop_rxtx(dev);
- netif_stop_queue(dev);
- netif_device_detach(dev);
- spin_unlock_irq(&np->lock);
- enable_irq(dev->irq);
-
- /* Update the error counts. */
- __get_stats(dev);
- /* pci_power_off(pdev, -1); */
- drain_ring(dev);
- {
- u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
- /* Restore PME enable bit */
- if (wol) {
- /* restart the NIC in WOL mode.
- * The nic must be stopped for this.
- * FIXME: use the WOL interupt
- */
- enable_wol_mode(dev, 0);
- } else {
- /* Restore PME enable bit unmolested */
- writel(np->SavedClkRun, ioaddr + ClkRun);
- }
- }
- } else {
- netif_device_detach(dev);
- }
- rtnl_unlock();
- return 0;
- }
- static int natsemi_resume (struct pci_dev *pdev)
- {
- struct net_device *dev = pci_get_drvdata (pdev);
- struct netdev_private *np = dev->priv;
- rtnl_lock();
- if (netif_device_present(dev))
- goto out;
- if (netif_running(dev)) {
- pci_enable_device(pdev);
- /* pci_power_on(pdev); */
-
- natsemi_reset(dev);
- init_ring(dev);
- spin_lock_irq(&np->lock);
- init_registers(dev);
- netif_device_attach(dev);
- spin_unlock_irq(&np->lock);
- mod_timer(&np->timer, jiffies + 1*HZ);
- } else {
- netif_device_attach(dev);
- }
- out:
- rtnl_unlock();
- return 0;
- }
- #endif /* CONFIG_PM */
- static struct pci_driver natsemi_driver = {
- name: DRV_NAME,
- id_table: natsemi_pci_tbl,
- probe: natsemi_probe1,
- remove: __devexit_p(natsemi_remove1),
- #ifdef CONFIG_PM
- suspend: natsemi_suspend,
- resume: natsemi_resume,
- #endif
- };
- static int __init natsemi_init_mod (void)
- {
- /* when a module, this is printed whether or not devices are found in probe */
- #ifdef MODULE
- printk(version);
- #endif
- return pci_module_init (&natsemi_driver);
- }
- static void __exit natsemi_exit_mod (void)
- {
- pci_unregister_driver (&natsemi_driver);
- }
- module_init(natsemi_init_mod);
- module_exit(natsemi_exit_mod);