Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c
new file mode 100644
index 0000000..223bdad
--- /dev/null
+++ b/drivers/net/natsemi.c
@@ -0,0 +1,3273 @@
+/* natsemi.c: A Linux PCI Ethernet driver for the NatSemi DP8381x series. */
+/*
+ Written/copyright 1999-2001 by Donald Becker.
+ Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com)
+ Portions copyright 2001,2002 Manfred Spraul (manfred@colorfullife.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_[G]EEPROM support (Tim Hockin)
+
+ version 1.0.13:
+ * crc cleanup (Matt Domsch <Matt_Domsch@dell.com>)
+
+ version 1.0.14:
+ * Cleanup some messages and autoneg in ethtool (Tim Hockin)
+
+ version 1.0.15:
+ * Get rid of cable_magic flag
+ * use new (National provided) solution for cable magic issue
+
+ version 1.0.16:
+ * call netdev_rx() for RxErrors (Manfred Spraul)
+ * formatting and cleanups
+ * change options and full_duplex arrays to be zero
+ initialized
+ * enable only the WoL and PHY interrupts in wol mode
+
+ version 1.0.17:
+ * only do cable_magic on 83815 and early 83816 (Tim Hockin)
+ * create a function for rx refill (Manfred Spraul)
+ * combine drain_ring and init_ring (Manfred Spraul)
+ * oom handling (Manfred Spraul)
+ * hands_off instead of playing with netif_device_{de,a}ttach
+ (Manfred Spraul)
+ * be sure to write the MAC back to the chip (Manfred Spraul)
+ * lengthen EEPROM timeout, and always warn about timeouts
+ (Manfred Spraul)
+ * comments update (Manfred)
+ * do the right thing on a phy-reset (Manfred and Tim)
+
+ TODO:
+ * big endian support with CFG:BEM instead of cpu_to_le32
+ * support for an external PHY
+ * NAPI
+*/
+
+#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 <linux/crc32.h>
+#include <linux/bitops.h>
+#include <asm/processor.h> /* Processor type for cache alignment. */
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+#define DRV_NAME "natsemi"
+#define DRV_VERSION "1.07+LK1.0.17"
+#define DRV_RELDATE "Sep 27, 2002"
+
+#define RX_OFFSET 2
+
+/* Updated to recommendations in pci-skeleton v2.03. */
+
+/* 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 = -1;
+
+/* 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];
+static int full_duplex[MAX_UNITS];
+
+/* 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 32
+
+/* 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 */
+
+/* Buffer sizes:
+ * The nic writes 32-bit values, even if the upper bytes of
+ * a 32-bit value are beyond the end of the buffer.
+ */
+#define NATSEMI_HEADERS 22 /* 2*mac,type,vlan,crc */
+#define NATSEMI_PADDING 16 /* 2 bytes should be sufficient */
+#define NATSEMI_LONGPKT 1518 /* limit for normal packets */
+#define NATSEMI_RX_LIMIT 2046 /* maximum supported by hardware */
+
+/* These identify the driver base version and may not be removed. */
+static char version[] __devinitdata =
+ KERN_INFO DRV_NAME " dp8381x driver, version "
+ DRV_VERSION ", " DRV_RELDATE "\n"
+ KERN_INFO " originally by Donald Becker <becker@scyld.com>\n"
+ KERN_INFO " http://www.scyld.com/network/natsemi.html\n"
+ KERN_INFO " 2.4.x kernel port by 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_param(max_interrupt_work, int, 0);
+module_param(mtu, int, 0);
+module_param(debug, int, 0);
+module_param(rx_copybreak, int, 0);
+module_param_array(options, int, NULL, 0);
+module_param_array(full_duplex, int, NULL, 0);
+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 default debug level");
+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
+
+Most operations are synchronized on the np->lock irq spinlock, except the
+performance critical codepaths:
+
+The rx process only runs in the interrupt handler. Access from outside
+the interrupt handler is only permitted after disable_irq().
+
+The rx process usually runs under the dev->xmit_lock. If np->intr_tx_reap
+is set, then access is permitted under spin_lock_irq(&np->lock).
+
+Thus configuration functions that want to access everything must call
+ disable_irq(dev->irq);
+ spin_lock_bh(dev->xmit_lock);
+ spin_lock_irq(&np->lock);
+
+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)
+
+
+/*
+ * Support for fibre connections on Am79C874:
+ * This phy needs a special setup when connected to a fibre cable.
+ * http://www.amd.com/files/connectivitysolutions/networking/archivednetworking/22235.pdf
+ */
+#define PHYID_AM79C874 0x0022561b
+
+#define MII_MCTRL 0x15 /* mode control register */
+#define MII_FX_SEL 0x0001 /* 100BASE-FX (fiber) */
+#define MII_EN_SCRM 0x0004 /* enable scrambler (tp) */
+
+
+/* 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[] = {
+ { 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,
+ IntrHoldoff = 0x1C, /* DP83816 only */
+ 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) */
+#define PMDCSR_VAL 0x189c /* enable preferred adaptation circuitry */
+#define TSTDAT_VAL 0x0
+#define DSPCFG_VAL 0x5040
+#define SDCFG_VAL 0x008c /* set voltage thresholds for Signal Detect */
+#define DSPCFG_LOCK 0x20 /* coefficient lock bit in DSPCFG */
+#define DSPCFG_COEF 0x1000 /* see coefficient (in TSTDAT) bit in DSPCFG */
+#define TSTDAT_FIXED 0xe8 /* magic number for bad coefficients */
+
+/* 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,
+ MII_Data = 0x10,
+ MII_Write = 0x20,
+ MII_ShiftClk = 0x40,
+};
+
+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
+};
+
+/*
+ * Tx Configuration:
+ * - 256 byte DMA burst length
+ * - fill threshold 512 bytes (i.e. restart DMA when 512 bytes are free)
+ * - 64 bytes initial drain threshold (i.e. begin actual transmission
+ * when 64 byte are in the fifo)
+ * - on tx underruns, increase drain threshold by 64.
+ * - at most use a drain threshold of 1472 bytes: The sum of the fill
+ * threshold and the drain threshold must be less than 2016 bytes.
+ *
+ */
+#define TX_FLTH_VAL ((512/32) << 8)
+#define TX_DRTH_VAL_START (64/32)
+#define TX_DRTH_VAL_INC 2
+#define TX_DRTH_VAL_LIMIT (1472/32)
+
+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
+};
+#define RX_DRTH_VAL (128/8)
+
+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 = 0x1f,
+};
+
+#define PHY_ADDR_NONE 32
+#define PHY_ADDR_INTERNAL 1
+
+/* values we might find in the silicon revision register */
+#define SRR_DP83815_C 0x0302
+#define SRR_DP83815_D 0x0403
+#define SRR_DP83816_A4 0x0504
+#define SRR_DP83816_A5 0x0505
+
+/* 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];
+ /* 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;
+ /* Media monitoring timer */
+ struct timer_list timer;
+ /* Frequently used values: keep some adjacent for cache effect */
+ struct pci_dev *pci_dev;
+ struct netdev_desc *rx_head_desc;
+ /* Producer/consumer ring indices */
+ unsigned int cur_rx, dirty_rx;
+ unsigned int cur_tx, dirty_tx;
+ /* Based on MTU+slack. */
+ unsigned int rx_buf_sz;
+ int oom;
+ /* Do not touch the nic registers */
+ int hands_off;
+ /* external phy that is used: only valid if dev->if_port != PORT_TP */
+ int mii;
+ int phy_addr_external;
+ 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;
+ /* expected DSPCFG value */
+ u16 dspcfg;
+ /* parms saved in ethtool format */
+ u16 speed; /* The forced speed, 10Mb, 100Mb, gigabit */
+ u8 duplex; /* Duplex, half or full */
+ u8 autoneg; /* Autonegotiation enabled */
+ /* MII transceiver section */
+ u16 advertising;
+ unsigned int iosize;
+ spinlock_t lock;
+ u32 msg_enable;
+};
+
+static void move_int_phy(struct net_device *dev, int addr);
+static int eeprom_read(void __iomem *ioaddr, int location);
+static int mdio_read(struct net_device *dev, int reg);
+static void mdio_write(struct net_device *dev, int reg, u16 data);
+static void init_phy_fixup(struct net_device *dev);
+static int miiport_read(struct net_device *dev, int phy_id, int reg);
+static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data);
+static int find_mii(struct net_device *dev);
+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 do_cable_magic(struct net_device *dev);
+static void undo_cable_magic(struct net_device *dev);
+static void check_link(struct net_device *dev);
+static void netdev_timer(unsigned long data);
+static void dump_ring(struct net_device *dev);
+static void tx_timeout(struct net_device *dev);
+static int alloc_ring(struct net_device *dev);
+static void refill_rx(struct net_device *dev);
+static void init_ring(struct net_device *dev);
+static void drain_tx(struct net_device *dev);
+static void drain_ring(struct net_device *dev);
+static void free_ring(struct net_device *dev);
+static void reinit_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 irqreturn_t 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 int natsemi_change_mtu(struct net_device *dev, int new_mtu);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void natsemi_poll_controller(struct net_device *dev);
+#endif
+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 struct ethtool_ops ethtool_ops;
+
+static inline void __iomem *ns_ioaddr(struct net_device *dev)
+{
+ return (void __iomem *) dev->base_addr;
+}
+
+static void move_int_phy(struct net_device *dev, int addr)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+ int target = 31;
+
+ /*
+ * The internal phy is visible on the external mii bus. Therefore we must
+ * move it away before we can send commands to an external phy.
+ * There are two addresses we must avoid:
+ * - the address on the external phy that is used for transmission.
+ * - the address that we want to access. User space can access phys
+ * on the mii bus with SIOCGMIIREG/SIOCSMIIREG, independant from the
+ * phy that is used for transmission.
+ */
+
+ if (target == addr)
+ target--;
+ if (target == np->phy_addr_external)
+ target--;
+ writew(target, ioaddr + PhyCtrl);
+ readw(ioaddr + PhyCtrl);
+ udelay(1);
+}
+
+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 iostart, iosize;
+ void __iomem *ioaddr;
+ 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++;
+ iostart = 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);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ i = pci_request_regions(pdev, DRV_NAME);
+ if (i)
+ goto err_pci_request_regions;
+
+ ioaddr = ioremap(iostart, iosize);
+ if (!ioaddr) {
+ i = -ENOMEM;
+ goto err_ioremap;
+ }
+
+ /* 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 = (unsigned long __force) ioaddr;
+ dev->irq = irq;
+
+ np = netdev_priv(dev);
+
+ np->pci_dev = pdev;
+ pci_set_drvdata(pdev, dev);
+ np->iosize = iosize;
+ spin_lock_init(&np->lock);
+ np->msg_enable = (debug >= 0) ? (1<<debug)-1 : NATSEMI_DEF_MSG;
+ np->hands_off = 0;
+
+ /* Initial port:
+ * - If the nic was configured to use an external phy and if find_mii
+ * finds a phy: use external port, first phy that replies.
+ * - Otherwise: internal port.
+ * Note that the phy address for the internal phy doesn't matter:
+ * The address would be used to access a phy over the mii bus, but
+ * the internal phy is accessed through mapped registers.
+ */
+ if (readl(ioaddr + ChipConfig) & CfgExtPhy)
+ dev->if_port = PORT_MII;
+ else
+ dev->if_port = PORT_TP;
+ /* Reset the chip to erase previous misconfiguration. */
+ natsemi_reload_eeprom(dev);
+ natsemi_reset(dev);
+
+ if (dev->if_port != PORT_TP) {
+ np->phy_addr_external = find_mii(dev);
+ if (np->phy_addr_external == PHY_ADDR_NONE) {
+ dev->if_port = PORT_TP;
+ np->phy_addr_external = PHY_ADDR_INTERNAL;
+ }
+ } else {
+ np->phy_addr_external = PHY_ADDR_INTERNAL;
+ }
+
+ 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) {
+ if (option & 0x200)
+ np->full_duplex = 1;
+ if (option & 15)
+ printk(KERN_INFO
+ "natsemi %s: ignoring user supplied media type %d",
+ pci_name(np->pci_dev), option & 15);
+ }
+ if (find_cnt < MAX_UNITS && full_duplex[find_cnt])
+ 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->change_mtu = &natsemi_change_mtu;
+ dev->do_ioctl = &netdev_ioctl;
+ dev->tx_timeout = &tx_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ dev->poll_controller = &natsemi_poll_controller;
+#endif
+ SET_ETHTOOL_OPS(dev, ðtool_ops);
+
+ if (mtu)
+ dev->mtu = mtu;
+
+ netif_carrier_off(dev);
+
+ /* get the initial settings from hardware */
+ tmp = mdio_read(dev, MII_BMCR);
+ np->speed = (tmp & BMCR_SPEED100)? SPEED_100 : SPEED_10;
+ np->duplex = (tmp & BMCR_FULLDPLX)? DUPLEX_FULL : DUPLEX_HALF;
+ np->autoneg = (tmp & BMCR_ANENABLE)? AUTONEG_ENABLE: AUTONEG_DISABLE;
+ np->advertising= mdio_read(dev, MII_ADVERTISE);
+
+ if ((np->advertising & ADVERTISE_ALL) != ADVERTISE_ALL
+ && netif_msg_probe(np)) {
+ printk(KERN_INFO "natsemi %s: Transceiver default autonegotiation %s "
+ "10%s %s duplex.\n",
+ pci_name(np->pci_dev),
+ (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE)?
+ "enabled, advertise" : "disabled, force",
+ (np->advertising &
+ (ADVERTISE_100FULL|ADVERTISE_100HALF))?
+ "0" : "",
+ (np->advertising &
+ (ADVERTISE_100FULL|ADVERTISE_10FULL))?
+ "full" : "half");
+ }
+ if (netif_msg_probe(np))
+ printk(KERN_INFO
+ "natsemi %s: Transceiver status %#04x advertising %#04x.\n",
+ pci_name(np->pci_dev), mdio_read(dev, MII_BMSR),
+ np->advertising);
+
+ /* save the silicon revision for later querying */
+ np->srr = readl(ioaddr + SiliconRev);
+ if (netif_msg_hw(np))
+ printk(KERN_INFO "natsemi %s: silicon revision %#04x.\n",
+ pci_name(np->pci_dev), np->srr);
+
+ i = register_netdev(dev);
+ if (i)
+ goto err_register_netdev;
+
+ if (netif_msg_drv(np)) {
+ printk(KERN_INFO "natsemi %s: %s at %#08lx (%s), ",
+ dev->name, natsemi_pci_info[chip_idx].name, iostart,
+ pci_name(np->pci_dev));
+ for (i = 0; i < ETH_ALEN-1; i++)
+ printk("%02x:", dev->dev_addr[i]);
+ printk("%02x, IRQ %d", dev->dev_addr[i], irq);
+ if (dev->if_port == PORT_TP)
+ printk(", port TP.\n");
+ else
+ printk(", port MII, phy ad %d.\n", np->phy_addr_external);
+ }
+ return 0;
+
+ err_register_netdev:
+ iounmap(ioaddr);
+
+ err_ioremap:
+ pci_release_regions(pdev);
+ pci_set_drvdata(pdev, NULL);
+
+ err_pci_request_regions:
+ free_netdev(dev);
+ return i;
+}
+
+
+/* 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(void __iomem *addr, int location)
+{
+ int i;
+ int retval = 0;
+ void __iomem *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
+ * internal management registers as if they were MII connected.
+ * External Phy registers are referenced through the MII interface.
+ */
+
+/* clock transitions >= 20ns (25MHz)
+ * One readl should be good to PCI @ 100MHz
+ */
+#define mii_delay(ioaddr) readl(ioaddr + EECtrl)
+
+static int mii_getbit (struct net_device *dev)
+{
+ int data;
+ void __iomem *ioaddr = ns_ioaddr(dev);
+
+ writel(MII_ShiftClk, ioaddr + EECtrl);
+ data = readl(ioaddr + EECtrl);
+ writel(0, ioaddr + EECtrl);
+ mii_delay(ioaddr);
+ return (data & MII_Data)? 1 : 0;
+}
+
+static void mii_send_bits (struct net_device *dev, u32 data, int len)
+{
+ u32 i;
+ void __iomem *ioaddr = ns_ioaddr(dev);
+
+ for (i = (1 << (len-1)); i; i >>= 1)
+ {
+ u32 mdio_val = MII_Write | ((data & i)? MII_Data : 0);
+ writel(mdio_val, ioaddr + EECtrl);
+ mii_delay(ioaddr);
+ writel(mdio_val | MII_ShiftClk, ioaddr + EECtrl);
+ mii_delay(ioaddr);
+ }
+ writel(0, ioaddr + EECtrl);
+ mii_delay(ioaddr);
+}
+
+static int miiport_read(struct net_device *dev, int phy_id, int reg)
+{
+ u32 cmd;
+ int i;
+ u32 retval = 0;
+
+ /* Ensure sync */
+ mii_send_bits (dev, 0xffffffff, 32);
+ /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
+ /* ST,OP = 0110'b for read operation */
+ cmd = (0x06 << 10) | (phy_id << 5) | reg;
+ mii_send_bits (dev, cmd, 14);
+ /* Turnaround */
+ if (mii_getbit (dev))
+ return 0;
+ /* Read data */
+ for (i = 0; i < 16; i++) {
+ retval <<= 1;
+ retval |= mii_getbit (dev);
+ }
+ /* End cycle */
+ mii_getbit (dev);
+ return retval;
+}
+
+static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data)
+{
+ u32 cmd;
+
+ /* Ensure sync */
+ mii_send_bits (dev, 0xffffffff, 32);
+ /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
+ /* ST,OP,AAAAA,RRRRR,TA = 0101xxxxxxxxxx10'b = 0x5002 for write */
+ cmd = (0x5002 << 16) | (phy_id << 23) | (reg << 18) | data;
+ mii_send_bits (dev, cmd, 32);
+ /* End cycle */
+ mii_getbit (dev);
+}
+
+static int mdio_read(struct net_device *dev, int reg)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+
+ /* The 83815 series has two ports:
+ * - an internal transceiver
+ * - an external mii bus
+ */
+ if (dev->if_port == PORT_TP)
+ return readw(ioaddr+BasicControl+(reg<<2));
+ else
+ return miiport_read(dev, np->phy_addr_external, reg);
+}
+
+static void mdio_write(struct net_device *dev, int reg, u16 data)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+
+ /* The 83815 series has an internal transceiver; handle separately */
+ if (dev->if_port == PORT_TP)
+ writew(data, ioaddr+BasicControl+(reg<<2));
+ else
+ miiport_write(dev, np->phy_addr_external, reg, data);
+}
+
+static void init_phy_fixup(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+ int i;
+ u32 cfg;
+ u16 tmp;
+
+ /* restore stuff lost when power was out */
+ tmp = mdio_read(dev, MII_BMCR);
+ if (np->autoneg == AUTONEG_ENABLE) {
+ /* renegotiate if something changed */
+ if ((tmp & BMCR_ANENABLE) == 0
+ || np->advertising != mdio_read(dev, MII_ADVERTISE))
+ {
+ /* turn on autonegotiation and force negotiation */
+ tmp |= (BMCR_ANENABLE | BMCR_ANRESTART);
+ mdio_write(dev, MII_ADVERTISE, np->advertising);
+ }
+ } else {
+ /* turn off auto negotiation, set speed and duplexity */
+ tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX);
+ if (np->speed == SPEED_100)
+ tmp |= BMCR_SPEED100;
+ if (np->duplex == DUPLEX_FULL)
+ tmp |= BMCR_FULLDPLX;
+ /*
+ * Note: there is no good way to inform the link partner
+ * that our capabilities changed. The user has to unplug
+ * and replug the network cable after some changes, e.g.
+ * after switching from 10HD, autoneg off to 100 HD,
+ * autoneg off.
+ */
+ }
+ mdio_write(dev, MII_BMCR, tmp);
+ readl(ioaddr + ChipConfig);
+ udelay(1);
+
+ /* find out what phy this is */
+ np->mii = (mdio_read(dev, MII_PHYSID1) << 16)
+ + mdio_read(dev, MII_PHYSID2);
+
+ /* handle external phys here */
+ switch (np->mii) {
+ case PHYID_AM79C874:
+ /* phy specific configuration for fibre/tp operation */
+ tmp = mdio_read(dev, MII_MCTRL);
+ tmp &= ~(MII_FX_SEL | MII_EN_SCRM);
+ if (dev->if_port == PORT_FIBRE)
+ tmp |= MII_FX_SEL;
+ else
+ tmp |= MII_EN_SCRM;
+ mdio_write(dev, MII_MCTRL, tmp);
+ break;
+ default:
+ break;
+ }
+ cfg = readl(ioaddr + ChipConfig);
+ if (cfg & CfgExtPhy)
+ return;
+
+ /* 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.
+
+ It seems that the DSP needs a few usec to reinitialize after
+ the start of the phy. Just retry writing these values until they
+ stick.
+ */
+ for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
+
+ int dspcfg;
+ writew(1, ioaddr + PGSEL);
+ writew(PMDCSR_VAL, ioaddr + PMDCSR);
+ writew(TSTDAT_VAL, ioaddr + TSTDAT);
+ np->dspcfg = (np->srr <= SRR_DP83815_C)?
+ DSPCFG_VAL : (DSPCFG_COEF | readw(ioaddr + DSPCFG));
+ writew(np->dspcfg, ioaddr + DSPCFG);
+ writew(SDCFG_VAL, ioaddr + SDCFG);
+ writew(0, ioaddr + PGSEL);
+ readl(ioaddr + ChipConfig);
+ udelay(10);
+
+ writew(1, ioaddr + PGSEL);
+ dspcfg = readw(ioaddr + DSPCFG);
+ writew(0, ioaddr + PGSEL);
+ if (np->dspcfg == dspcfg)
+ break;
+ }
+
+ if (netif_msg_link(np)) {
+ if (i==NATSEMI_HW_TIMEOUT) {
+ printk(KERN_INFO
+ "%s: DSPCFG mismatch after retrying for %d usec.\n",
+ dev->name, i*10);
+ } else {
+ printk(KERN_INFO
+ "%s: DSPCFG accepted after %d usec.\n",
+ dev->name, i*10);
+ }
+ }
+ /*
+ * 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);
+}
+
+static int switch_port_external(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+ u32 cfg;
+
+ cfg = readl(ioaddr + ChipConfig);
+ if (cfg & CfgExtPhy)
+ return 0;
+
+ if (netif_msg_link(np)) {
+ printk(KERN_INFO "%s: switching to external transceiver.\n",
+ dev->name);
+ }
+
+ /* 1) switch back to external phy */
+ writel(cfg | (CfgExtPhy | CfgPhyDis), ioaddr + ChipConfig);
+ readl(ioaddr + ChipConfig);
+ udelay(1);
+
+ /* 2) reset the external phy: */
+ /* resetting the external PHY has been known to cause a hub supplying
+ * power over Ethernet to kill the power. We don't want to kill
+ * power to this computer, so we avoid resetting the phy.
+ */
+
+ /* 3) reinit the phy fixup, it got lost during power down. */
+ move_int_phy(dev, np->phy_addr_external);
+ init_phy_fixup(dev);
+
+ return 1;
+}
+
+static int switch_port_internal(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+ int i;
+ u32 cfg;
+ u16 bmcr;
+
+ cfg = readl(ioaddr + ChipConfig);
+ if (!(cfg &CfgExtPhy))
+ return 0;
+
+ if (netif_msg_link(np)) {
+ printk(KERN_INFO "%s: switching to internal transceiver.\n",
+ dev->name);
+ }
+ /* 1) switch back to internal phy: */
+ cfg = cfg & ~(CfgExtPhy | CfgPhyDis);
+ writel(cfg, ioaddr + ChipConfig);
+ readl(ioaddr + ChipConfig);
+ udelay(1);
+
+ /* 2) reset the internal phy: */
+ bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2));
+ writel(bmcr | BMCR_RESET, ioaddr+BasicControl+(MII_BMCR<<2));
+ readl(ioaddr + ChipConfig);
+ udelay(10);
+ for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
+ bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2));
+ if (!(bmcr & BMCR_RESET))
+ break;
+ udelay(10);
+ }
+ if (i==NATSEMI_HW_TIMEOUT && netif_msg_link(np)) {
+ printk(KERN_INFO
+ "%s: phy reset did not complete in %d usec.\n",
+ dev->name, i*10);
+ }
+ /* 3) reinit the phy fixup, it got lost during power down. */
+ init_phy_fixup(dev);
+
+ return 1;
+}
+
+/* Scan for a PHY on the external mii bus.
+ * There are two tricky points:
+ * - Do not scan while the internal phy is enabled. The internal phy will
+ * crash: e.g. reads from the DSPCFG register will return odd values and
+ * the nasty random phy reset code will reset the nic every few seconds.
+ * - The internal phy must be moved around, an external phy could
+ * have the same address as the internal phy.
+ */
+static int find_mii(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int tmp;
+ int i;
+ int did_switch;
+
+ /* Switch to external phy */
+ did_switch = switch_port_external(dev);
+
+ /* Scan the possible phy addresses:
+ *
+ * PHY address 0 means that the phy is in isolate mode. Not yet
+ * supported due to lack of test hardware. User space should
+ * handle it through ethtool.
+ */
+ for (i = 1; i <= 31; i++) {
+ move_int_phy(dev, i);
+ tmp = miiport_read(dev, i, MII_BMSR);
+ if (tmp != 0xffff && tmp != 0x0000) {
+ /* found something! */
+ np->mii = (mdio_read(dev, MII_PHYSID1) << 16)
+ + mdio_read(dev, MII_PHYSID2);
+ if (netif_msg_probe(np)) {
+ printk(KERN_INFO "natsemi %s: found external phy %08x at address %d.\n",
+ pci_name(np->pci_dev), np->mii, i);
+ }
+ break;
+ }
+ }
+ /* And switch back to internal phy: */
+ if (did_switch)
+ switch_port_internal(dev);
+ return i;
+}
+
+/* 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 = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+
+ /*
+ * 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(ioaddr + ChipConfig) & CFG_RESET_SAVE;
+ /* WCSR */
+ wcsr = readl(ioaddr + WOLCmd) & WCSR_RESET_SAVE;
+ /* RFCR */
+ rfcr = readl(ioaddr + RxFilterAddr) & RFCR_RESET_SAVE;
+ /* PMATCH */
+ for (i = 0; i < 3; i++) {
+ writel(i*2, ioaddr + RxFilterAddr);
+ pmatch[i] = readw(ioaddr + RxFilterData);
+ }
+ /* SOPAS */
+ for (i = 0; i < 3; i++) {
+ writel(0xa+(i*2), ioaddr + RxFilterAddr);
+ sopass[i] = readw(ioaddr + RxFilterData);
+ }
+
+ /* now whack the chip */
+ writel(ChipReset, ioaddr + ChipCmd);
+ for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
+ if (!(readl(ioaddr + ChipCmd) & ChipReset))
+ break;
+ udelay(5);
+ }
+ if (i==NATSEMI_HW_TIMEOUT) {
+ printk(KERN_WARNING "%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(ioaddr + ChipConfig) & ~CFG_RESET_SAVE;
+ /* turn on external phy if it was selected */
+ if (dev->if_port == PORT_TP)
+ cfg &= ~(CfgExtPhy | CfgPhyDis);
+ else
+ cfg |= (CfgExtPhy | CfgPhyDis);
+ writel(cfg, ioaddr + ChipConfig);
+ /* restore WCSR */
+ wcsr |= readl(ioaddr + WOLCmd) & ~WCSR_RESET_SAVE;
+ writel(wcsr, ioaddr + WOLCmd);
+ /* read RFCR */
+ rfcr |= readl(ioaddr + RxFilterAddr) & ~RFCR_RESET_SAVE;
+ /* restore PMATCH */
+ for (i = 0; i < 3; i++) {
+ writel(i*2, ioaddr + RxFilterAddr);
+ writew(pmatch[i], ioaddr + RxFilterData);
+ }
+ for (i = 0; i < 3; i++) {
+ writel(0xa+(i*2), ioaddr + RxFilterAddr);
+ writew(sopass[i], ioaddr + RxFilterData);
+ }
+ /* restore RFCR */
+ writel(rfcr, ioaddr + RxFilterAddr);
+}
+
+static void natsemi_reload_eeprom(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+ int i;
+
+ writel(EepromReload, ioaddr + PCIBusCfg);
+ for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
+ udelay(50);
+ if (!(readl(ioaddr + PCIBusCfg) & EepromReload))
+ break;
+ }
+ if (i==NATSEMI_HW_TIMEOUT) {
+ printk(KERN_WARNING "natsemi %s: EEPROM did not reload in %d usec.\n",
+ pci_name(np->pci_dev), i*50);
+ } else if (netif_msg_hw(np)) {
+ printk(KERN_DEBUG "natsemi %s: EEPROM reloaded in %d usec.\n",
+ pci_name(np->pci_dev), i*50);
+ }
+}
+
+static void natsemi_stop_rxtx(struct net_device *dev)
+{
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ struct netdev_private *np = netdev_priv(dev);
+ 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) {
+ printk(KERN_WARNING "%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 = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ 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);
+ /* now set the MAC address according to dev->dev_addr */
+ for (i = 0; i < 3; i++) {
+ u16 mac = (dev->dev_addr[2*i+1]<<8) + dev->dev_addr[2*i];
+
+ writel(i*2, ioaddr + RxFilterAddr);
+ writew(mac, ioaddr + RxFilterData);
+ }
+ writel(np->cur_rx_mode, ioaddr + RxFilterAddr);
+ 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 do_cable_magic(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem *ioaddr = ns_ioaddr(dev);
+
+ if (dev->if_port != PORT_TP)
+ return;
+
+ if (np->srr >= SRR_DP83816_A5)
+ return;
+
+ /*
+ * 100 MBit links with short cables can trip an issue with the chip.
+ * The problem manifests as lots of CRC errors and/or flickering
+ * activity LED while idle. This process is based on instructions
+ * from engineers at National.
+ */
+ if (readl(ioaddr + ChipConfig) & CfgSpeed100) {
+ u16 data;
+
+ writew(1, ioaddr + PGSEL);
+ /*
+ * coefficient visibility should already be enabled via
+ * DSPCFG | 0x1000
+ */
+ data = readw(ioaddr + TSTDAT) & 0xff;
+ /*
+ * the value must be negative, and within certain values
+ * (these values all come from National)
+ */
+ if (!(data & 0x80) || ((data >= 0xd8) && (data <= 0xff))) {
+ struct netdev_private *np = netdev_priv(dev);
+
+ /* the bug has been triggered - fix the coefficient */
+ writew(TSTDAT_FIXED, ioaddr + TSTDAT);
+ /* lock the value */
+ data = readw(ioaddr + DSPCFG);
+ np->dspcfg = data | DSPCFG_LOCK;
+ writew(np->dspcfg, ioaddr + DSPCFG);
+ }
+ writew(0, ioaddr + PGSEL);
+ }
+}
+
+static void undo_cable_magic(struct net_device *dev)
+{
+ u16 data;
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ if (dev->if_port != PORT_TP)
+ return;
+
+ if (np->srr >= SRR_DP83816_A5)
+ return;
+
+ writew(1, ioaddr + PGSEL);
+ /* make sure the lock bit is clear */
+ data = readw(ioaddr + DSPCFG);
+ np->dspcfg = data & ~DSPCFG_LOCK;
+ writew(np->dspcfg, ioaddr + DSPCFG);
+ writew(0, ioaddr + PGSEL);
+}
+
+static void check_link(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ int duplex;
+ u16 bmsr;
+
+ /* The link status field is latched: it remains low after a temporary
+ * link failure until it's read. We need the current link status,
+ * thus read twice.
+ */
+ mdio_read(dev, MII_BMSR);
+ bmsr = mdio_read(dev, MII_BMSR);
+
+ if (!(bmsr & BMSR_LSTATUS)) {
+ if (netif_carrier_ok(dev)) {
+ if (netif_msg_link(np))
+ printk(KERN_NOTICE "%s: link down.\n",
+ dev->name);
+ netif_carrier_off(dev);
+ undo_cable_magic(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);
+ do_cable_magic(dev);
+ }
+
+ duplex = np->full_duplex;
+ if (!duplex) {
+ if (bmsr & BMSR_ANEGCOMPLETE) {
+ int tmp = mii_nway_result(
+ np->advertising & mdio_read(dev, MII_LPA));
+ if (tmp == LPA_100FULL || tmp == LPA_10FULL)
+ duplex = 1;
+ } else if (mdio_read(dev, MII_BMCR) & BMCR_FULLDPLX)
+ duplex = 1;
+ }
+
+ /* 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 = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ init_phy_fixup(dev);
+
+ /* 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 |
+ TX_FLTH_VAL | TX_DRTH_VAL_START;
+ 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 | RX_DRTH_VAL;
+ /* if receive ring now has bigger buffers than normal, enable jumbo */
+ if (np->rx_buf_sz > NATSEMI_LONGPKT)
+ np->rx_config |= RxAcceptLong;
+
+ 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 %#08x\n",
+ 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 */
+}
+
+/*
+ * netdev_timer:
+ * Purpose:
+ * 1) check for link changes. Usually they are handled by the MII interrupt
+ * but it doesn't hurt to check twice.
+ * 2) check for sudden death of the NIC:
+ * 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.
+ * 3) check of death of the RX path due to OOM
+ */
+static void netdev_timer(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *)data;
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ int next_tick = 5*HZ;
+
+ 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);
+ }
+
+ if (dev->if_port == PORT_TP) {
+ u16 dspcfg;
+
+ spin_lock_irq(&np->lock);
+ /* 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 != np->dspcfg) {
+ if (!netif_queue_stopped(dev)) {
+ spin_unlock_irq(&np->lock);
+ if (netif_msg_hw(np))
+ printk(KERN_NOTICE "%s: possible phy reset: "
+ "re-initializing\n", dev->name);
+ disable_irq(dev->irq);
+ spin_lock_irq(&np->lock);
+ natsemi_stop_rxtx(dev);
+ dump_ring(dev);
+ reinit_ring(dev);
+ init_registers(dev);
+ spin_unlock_irq(&np->lock);
+ enable_irq(dev->irq);
+ } else {
+ /* hurry back */
+ next_tick = HZ;
+ spin_unlock_irq(&np->lock);
+ }
+ } else {
+ /* init_registers() calls check_link() for the above case */
+ check_link(dev);
+ spin_unlock_irq(&np->lock);
+ }
+ } else {
+ spin_lock_irq(&np->lock);
+ check_link(dev);
+ spin_unlock_irq(&np->lock);
+ }
+ if (np->oom) {
+ disable_irq(dev->irq);
+ np->oom = 0;
+ refill_rx(dev);
+ enable_irq(dev->irq);
+ if (!np->oom) {
+ writel(RxOn, ioaddr + ChipCmd);
+ } else {
+ next_tick = 1;
+ }
+ }
+ mod_timer(&np->timer, jiffies + next_tick);
+}
+
+static void dump_ring(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+
+ 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 = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ disable_irq(dev->irq);
+ spin_lock_irq(&np->lock);
+ if (!np->hands_off) {
+ 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);
+ reinit_ring(dev);
+ init_registers(dev);
+ } else {
+ printk(KERN_WARNING
+ "%s: tx_timeout while in hands_off 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 = netdev_priv(dev);
+ 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;
+}
+
+static void refill_rx(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+
+ /* Refill the Rx ring buffers. */
+ for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
+ struct sk_buff *skb;
+ int entry = np->dirty_rx % RX_RING_SIZE;
+ if (np->rx_skbuff[entry] == NULL) {
+ unsigned int buflen = np->rx_buf_sz+NATSEMI_PADDING;
+ skb = dev_alloc_skb(buflen);
+ 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->tail, buflen, 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);
+ }
+ if (np->cur_rx - np->dirty_rx == RX_RING_SIZE) {
+ if (netif_msg_rx_err(np))
+ printk(KERN_WARNING "%s: going OOM.\n", dev->name);
+ np->oom = 1;
+ }
+}
+
+static void set_bufsize(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ if (dev->mtu <= ETH_DATA_LEN)
+ np->rx_buf_sz = ETH_DATA_LEN + NATSEMI_HEADERS;
+ else
+ np->rx_buf_sz = dev->mtu + NATSEMI_HEADERS;
+}
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void init_ring(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int i;
+
+ /* 1) TX ring */
+ np->dirty_tx = np->cur_tx = 0;
+ 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;
+ }
+
+ /* 2) RX ring */
+ np->dirty_rx = 0;
+ np->cur_rx = RX_RING_SIZE;
+ np->oom = 0;
+ set_bufsize(dev);
+
+ 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;
+ }
+ refill_rx(dev);
+ dump_ring(dev);
+}
+
+static void drain_tx(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int i;
+
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ if (np->tx_skbuff[i]) {
+ pci_unmap_single(np->pci_dev,
+ np->tx_dma[i], np->tx_skbuff[i]->len,
+ PCI_DMA_TODEVICE);
+ dev_kfree_skb(np->tx_skbuff[i]);
+ np->stats.tx_dropped++;
+ }
+ np->tx_skbuff[i] = NULL;
+ }
+}
+
+static void drain_rx(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ unsigned int buflen = np->rx_buf_sz;
+ 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], buflen,
+ PCI_DMA_FROMDEVICE);
+ dev_kfree_skb(np->rx_skbuff[i]);
+ }
+ np->rx_skbuff[i] = NULL;
+ }
+}
+
+static void drain_ring(struct net_device *dev)
+{
+ drain_rx(dev);
+ drain_tx(dev);
+}
+
+static void free_ring(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ pci_free_consistent(np->pci_dev,
+ sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
+ np->rx_ring, np->ring_dma);
+}
+
+static void reinit_rx(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int i;
+
+ /* RX Ring */
+ np->dirty_rx = 0;
+ np->cur_rx = RX_RING_SIZE;
+ np->rx_head_desc = &np->rx_ring[0];
+ /* Initialize all Rx descriptors. */
+ for (i = 0; i < RX_RING_SIZE; i++)
+ np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
+
+ refill_rx(dev);
+}
+
+static void reinit_ring(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int i;
+
+ /* drain TX ring */
+ drain_tx(dev);
+ np->dirty_tx = np->cur_tx = 0;
+ for (i=0;i<TX_RING_SIZE;i++)
+ np->tx_ring[i].cmd_status = 0;
+
+ reinit_rx(dev);
+}
+
+static int start_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ 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 (!np->hands_off) {
+ 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, ioaddr + 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 = netdev_priv(dev);
+
+ 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 irqreturn_t intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
+{
+ struct net_device *dev = dev_instance;
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ int boguscnt = max_interrupt_work;
+ unsigned int handled = 0;
+
+ if (np->hands_off)
+ return IRQ_NONE;
+ 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, mask %#08x.\n",
+ dev->name, intr_status,
+ readl(ioaddr + IntrMask));
+
+ if (intr_status == 0)
+ break;
+ handled = 1;
+
+ if (intr_status &
+ (IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
+ IntrRxErr | IntrRxOverrun)) {
+ 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) {
+ if (netif_msg_intr(np))
+ 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);
+
+ return IRQ_RETVAL(handled);
+}
+
+/* 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 = netdev_priv(dev);
+ 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);
+ unsigned int buflen = np->rx_buf_sz;
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ /* If the driver owns the next entry it's a new packet. Send it up. */
+ while (desc_status < 0) { /* e.g. & DescOwn */
+ int pkt_len;
+ if (netif_msg_rx_status(np))
+ printk(KERN_DEBUG
+ " netdev_rx() entry %d status was %#08x.\n",
+ entry, desc_status);
+ if (--boguscnt < 0)
+ break;
+ pkt_len = (desc_status & DescSizeMask) - 4;
+ 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 if (pkt_len > np->rx_buf_sz) {
+ /* if this is the tail of a double buffer
+ * packet, we've already counted the error
+ * on the first part. Ignore the second half.
+ */
+ } else {
+ struct sk_buff *skb;
+ /* Omit CRC size. */
+ /* 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 + RX_OFFSET)) != NULL) {
+ skb->dev = dev;
+ /* 16 byte align the IP header */
+ skb_reserve(skb, RX_OFFSET);
+ pci_dma_sync_single_for_cpu(np->pci_dev,
+ np->rx_dma[entry],
+ buflen,
+ PCI_DMA_FROMDEVICE);
+ eth_copy_and_sum(skb,
+ np->rx_skbuff[entry]->tail, pkt_len, 0);
+ skb_put(skb, pkt_len);
+ pci_dma_sync_single_for_device(np->pci_dev,
+ np->rx_dma[entry],
+ buflen,
+ PCI_DMA_FROMDEVICE);
+ } else {
+ pci_unmap_single(np->pci_dev, np->rx_dma[entry],
+ buflen, PCI_DMA_FROMDEVICE);
+ skb_put(skb = np->rx_skbuff[entry], pkt_len);
+ np->rx_skbuff[entry] = NULL;
+ }
+ skb->protocol = eth_type_trans(skb, dev);
+ 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_rx(dev);
+
+ /* Restart Rx engine if stopped. */
+ if (np->oom)
+ mod_timer(&np->timer, jiffies + 1);
+ else
+ writel(RxOn, ioaddr + ChipCmd);
+}
+
+static void netdev_error(struct net_device *dev, int intr_status)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ spin_lock(&np->lock);
+ if (intr_status & LinkChange) {
+ u16 lpa = mdio_read(dev, MII_LPA);
+ if (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE
+ && netif_msg_link(np)) {
+ printk(KERN_INFO
+ "%s: Autonegotiation advertising"
+ " %#04x partner %#04x.\n", dev->name,
+ np->advertising, 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) < TX_DRTH_VAL_LIMIT) {
+ np->tx_config += TX_DRTH_VAL_INC;
+ if (netif_msg_tx_err(np))
+ printk(KERN_NOTICE
+ "%s: increased tx threshold, txcfg %#08x.\n",
+ dev->name, np->tx_config);
+ } else {
+ if (netif_msg_tx_err(np))
+ printk(KERN_NOTICE
+ "%s: tx underrun with maximum tx threshold, 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 %#08x\n",
+ 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 overrun\n",
+ 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 %#08x\n", 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)
+{
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ struct netdev_private *np = netdev_priv(dev);
+
+ /* 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 = netdev_priv(dev);
+
+ /* The chip only need report frame silently dropped. */
+ spin_lock_irq(&np->lock);
+ if (netif_running(dev) && !np->hands_off)
+ __get_stats(dev);
+ spin_unlock_irq(&np->lock);
+
+ return &np->stats;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void natsemi_poll_controller(struct net_device *dev)
+{
+ disable_irq(dev->irq);
+ intr_handler(dev->irq, dev, NULL);
+ enable_irq(dev->irq);
+}
+#endif
+
+#define HASH_TABLE 0x200
+static void __set_rx_mode(struct net_device *dev)
+{
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ struct netdev_private *np = netdev_priv(dev);
+ 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) {
+ int i = (ether_crc(ETH_ALEN, mclist->dmi_addr) >> 23) & 0x1ff;
+ mc_filter[i/8] |= (1 << (i & 0x07));
+ }
+ 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 int natsemi_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if (new_mtu < 64 || new_mtu > NATSEMI_RX_LIMIT-NATSEMI_HEADERS)
+ return -EINVAL;
+
+ dev->mtu = new_mtu;
+
+ /* synchronized against open : rtnl_lock() held by caller */
+ if (netif_running(dev)) {
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ disable_irq(dev->irq);
+ spin_lock(&np->lock);
+ /* stop engines */
+ natsemi_stop_rxtx(dev);
+ /* drain rx queue */
+ drain_rx(dev);
+ /* change buffers */
+ set_bufsize(dev);
+ reinit_rx(dev);
+ writel(np->ring_dma, ioaddr + RxRingPtr);
+ /* restart engines */
+ writel(RxOn | TxOn, ioaddr + ChipCmd);
+ spin_unlock(&np->lock);
+ enable_irq(dev->irq);
+ }
+ return 0;
+}
+
+static void set_rx_mode(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ spin_lock_irq(&np->lock);
+ if (!np->hands_off)
+ __set_rx_mode(dev);
+ spin_unlock_irq(&np->lock);
+}
+
+static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ strncpy(info->driver, DRV_NAME, ETHTOOL_BUSINFO_LEN);
+ strncpy(info->version, DRV_VERSION, ETHTOOL_BUSINFO_LEN);
+ strncpy(info->bus_info, pci_name(np->pci_dev), ETHTOOL_BUSINFO_LEN);
+}
+
+static int get_regs_len(struct net_device *dev)
+{
+ return NATSEMI_REGS_SIZE;
+}
+
+static int get_eeprom_len(struct net_device *dev)
+{
+ return NATSEMI_EEPROM_SIZE;
+}
+
+static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ spin_lock_irq(&np->lock);
+ netdev_get_ecmd(dev, ecmd);
+ spin_unlock_irq(&np->lock);
+ return 0;
+}
+
+static int set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int res;
+ spin_lock_irq(&np->lock);
+ res = netdev_set_ecmd(dev, ecmd);
+ spin_unlock_irq(&np->lock);
+ return res;
+}
+
+static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ spin_lock_irq(&np->lock);
+ netdev_get_wol(dev, &wol->supported, &wol->wolopts);
+ netdev_get_sopass(dev, wol->sopass);
+ spin_unlock_irq(&np->lock);
+}
+
+static int set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ int res;
+ spin_lock_irq(&np->lock);
+ netdev_set_wol(dev, wol->wolopts);
+ res = netdev_set_sopass(dev, wol->sopass);
+ spin_unlock_irq(&np->lock);
+ return res;
+}
+
+static void get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ regs->version = NATSEMI_REGS_VER;
+ spin_lock_irq(&np->lock);
+ netdev_get_regs(dev, buf);
+ spin_unlock_irq(&np->lock);
+}
+
+static u32 get_msglevel(struct net_device *dev)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ return np->msg_enable;
+}
+
+static void set_msglevel(struct net_device *dev, u32 val)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ np->msg_enable = val;
+}
+
+static int nway_reset(struct net_device *dev)
+{
+ int tmp;
+ int r = -EINVAL;
+ /* if autoneg is off, it's an error */
+ tmp = mdio_read(dev, MII_BMCR);
+ if (tmp & BMCR_ANENABLE) {
+ tmp |= (BMCR_ANRESTART);
+ mdio_write(dev, MII_BMCR, tmp);
+ r = 0;
+ }
+ return r;
+}
+
+static u32 get_link(struct net_device *dev)
+{
+ /* LSTATUS is latched low until a read - so read twice */
+ mdio_read(dev, MII_BMSR);
+ return (mdio_read(dev, MII_BMSR)&BMSR_LSTATUS) ? 1:0;
+}
+
+static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ u8 eebuf[NATSEMI_EEPROM_SIZE];
+ int res;
+
+ eeprom->magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16);
+ spin_lock_irq(&np->lock);
+ res = netdev_get_eeprom(dev, eebuf);
+ spin_unlock_irq(&np->lock);
+ if (!res)
+ memcpy(data, eebuf+eeprom->offset, eeprom->len);
+ return res;
+}
+
+static struct ethtool_ops ethtool_ops = {
+ .get_drvinfo = get_drvinfo,
+ .get_regs_len = get_regs_len,
+ .get_eeprom_len = get_eeprom_len,
+ .get_settings = get_settings,
+ .set_settings = set_settings,
+ .get_wol = get_wol,
+ .set_wol = set_wol,
+ .get_regs = get_regs,
+ .get_msglevel = get_msglevel,
+ .set_msglevel = set_msglevel,
+ .nway_reset = nway_reset,
+ .get_link = get_link,
+ .get_eeprom = get_eeprom,
+};
+
+static int netdev_set_wol(struct net_device *dev, u32 newval)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ u32 data = readl(ioaddr + 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_DP83815_D) {
+ if (newval & WAKE_MAGICSECURE) {
+ data |= WakeMagicSecure;
+ }
+ }
+
+ writel(data, ioaddr + WOLCmd);
+
+ return 0;
+}
+
+static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ u32 regval = readl(ioaddr + WOLCmd);
+
+ *supported = (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST
+ | WAKE_ARP | WAKE_MAGIC);
+
+ if (np->srr >= SRR_DP83815_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 = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ u16 *sval = (u16 *)newval;
+ u32 addr;
+
+ if (np->srr < SRR_DP83815_D) {
+ return 0;
+ }
+
+ /* enable writing to these registers by disabling the RX filter */
+ addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask;
+ addr &= ~RxFilterEnable;
+ writel(addr, ioaddr + RxFilterAddr);
+
+ /* write the three words to (undocumented) RFCR vals 0xa, 0xc, 0xe */
+ writel(addr | 0xa, ioaddr + RxFilterAddr);
+ writew(sval[0], ioaddr + RxFilterData);
+
+ writel(addr | 0xc, ioaddr + RxFilterAddr);
+ writew(sval[1], ioaddr + RxFilterData);
+
+ writel(addr | 0xe, ioaddr + RxFilterAddr);
+ writew(sval[2], ioaddr + RxFilterData);
+
+ /* re-enable the RX filter */
+ writel(addr | RxFilterEnable, ioaddr + RxFilterAddr);
+
+ return 0;
+}
+
+static int netdev_get_sopass(struct net_device *dev, u8 *data)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ u16 *sval = (u16 *)data;
+ u32 addr;
+
+ if (np->srr < SRR_DP83815_D) {
+ sval[0] = sval[1] = sval[2] = 0;
+ return 0;
+ }
+
+ /* read the three words from (undocumented) RFCR vals 0xa, 0xc, 0xe */
+ addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask;
+
+ writel(addr | 0xa, ioaddr + RxFilterAddr);
+ sval[0] = readw(ioaddr + RxFilterData);
+
+ writel(addr | 0xc, ioaddr + RxFilterAddr);
+ sval[1] = readw(ioaddr + RxFilterData);
+
+ writel(addr | 0xe, ioaddr + RxFilterAddr);
+ sval[2] = readw(ioaddr + RxFilterData);
+
+ writel(addr, ioaddr + RxFilterAddr);
+
+ return 0;
+}
+
+static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+ struct netdev_private *np = netdev_priv(dev);
+ u32 tmp;
+
+ ecmd->port = dev->if_port;
+ ecmd->speed = np->speed;
+ ecmd->duplex = np->duplex;
+ ecmd->autoneg = np->autoneg;
+ ecmd->advertising = 0;
+ if (np->advertising & ADVERTISE_10HALF)
+ ecmd->advertising |= ADVERTISED_10baseT_Half;
+ if (np->advertising & ADVERTISE_10FULL)
+ ecmd->advertising |= ADVERTISED_10baseT_Full;
+ if (np->advertising & ADVERTISE_100HALF)
+ ecmd->advertising |= ADVERTISED_100baseT_Half;
+ if (np->advertising & ADVERTISE_100FULL)
+ ecmd->advertising |= ADVERTISED_100baseT_Full;
+ ecmd->supported = (SUPPORTED_Autoneg |
+ SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
+ SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
+ SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE);
+ ecmd->phy_address = np->phy_addr_external;
+ /*
+ * We intentionally report the phy address of the external
+ * phy, even if the internal phy is used. This is necessary
+ * to work around a deficiency of the ethtool interface:
+ * It's only possible to query the settings of the active
+ * port. Therefore
+ * # ethtool -s ethX port mii
+ * actually sends an ioctl to switch to port mii with the
+ * settings that are used for the current active port.
+ * If we would report a different phy address in this
+ * command, then
+ * # ethtool -s ethX port tp;ethtool -s ethX port mii
+ * would unintentionally change the phy address.
+ *
+ * Fortunately the phy address doesn't matter with the
+ * internal phy...
+ */
+
+ /* set information based on active port type */
+ switch (ecmd->port) {
+ default:
+ case PORT_TP:
+ ecmd->advertising |= ADVERTISED_TP;
+ ecmd->transceiver = XCVR_INTERNAL;
+ break;
+ case PORT_MII:
+ ecmd->advertising |= ADVERTISED_MII;
+ ecmd->transceiver = XCVR_EXTERNAL;
+ break;
+ case PORT_FIBRE:
+ ecmd->advertising |= ADVERTISED_FIBRE;
+ ecmd->transceiver = XCVR_EXTERNAL;
+ break;
+ }
+
+ /* if autonegotiation is on, try to return the active speed/duplex */
+ if (ecmd->autoneg == AUTONEG_ENABLE) {
+ ecmd->advertising |= ADVERTISED_Autoneg;
+ tmp = mii_nway_result(
+ np->advertising & mdio_read(dev, MII_LPA));
+ if (tmp == LPA_100FULL || tmp == LPA_100HALF)
+ ecmd->speed = SPEED_100;
+ else
+ ecmd->speed = SPEED_10;
+ if (tmp == LPA_100FULL || tmp == LPA_10FULL)
+ 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 = netdev_priv(dev);
+
+ if (ecmd->port != PORT_TP && ecmd->port != PORT_MII && ecmd->port != PORT_FIBRE)
+ return -EINVAL;
+ if (ecmd->transceiver != XCVR_INTERNAL && ecmd->transceiver != XCVR_EXTERNAL)
+ return -EINVAL;
+ if (ecmd->autoneg == AUTONEG_ENABLE) {
+ if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
+ ADVERTISED_10baseT_Full |
+ ADVERTISED_100baseT_Half |
+ ADVERTISED_100baseT_Full)) == 0) {
+ return -EINVAL;
+ }
+ } else if (ecmd->autoneg == AUTONEG_DISABLE) {
+ if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
+ return -EINVAL;
+ if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
+ return -EINVAL;
+ } else {
+ return -EINVAL;
+ }
+
+ /*
+ * maxtxpkt, maxrxpkt: ignored for now.
+ *
+ * transceiver:
+ * PORT_TP is always XCVR_INTERNAL, PORT_MII and PORT_FIBRE are always
+ * XCVR_EXTERNAL. The implementation thus ignores ecmd->transceiver and
+ * selects based on ecmd->port.
+ *
+ * Actually PORT_FIBRE is nearly identical to PORT_MII: it's for fibre
+ * phys that are connected to the mii bus. It's used to apply fibre
+ * specific updates.
+ */
+
+ /* WHEW! now lets bang some bits */
+
+ /* save the parms */
+ dev->if_port = ecmd->port;
+ np->autoneg = ecmd->autoneg;
+ np->phy_addr_external = ecmd->phy_address & PhyAddrMask;
+ if (np->autoneg == AUTONEG_ENABLE) {
+ /* advertise only what has been requested */
+ np->advertising &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
+ if (ecmd->advertising & ADVERTISED_10baseT_Half)
+ np->advertising |= ADVERTISE_10HALF;
+ if (ecmd->advertising & ADVERTISED_10baseT_Full)
+ np->advertising |= ADVERTISE_10FULL;
+ if (ecmd->advertising & ADVERTISED_100baseT_Half)
+ np->advertising |= ADVERTISE_100HALF;
+ if (ecmd->advertising & ADVERTISED_100baseT_Full)
+ np->advertising |= ADVERTISE_100FULL;
+ } else {
+ np->speed = ecmd->speed;
+ np->duplex = ecmd->duplex;
+ /* user overriding the initial full duplex parm? */
+ if (np->duplex == DUPLEX_HALF)
+ np->full_duplex = 0;
+ }
+
+ /* get the right phy enabled */
+ if (ecmd->port == PORT_TP)
+ switch_port_internal(dev);
+ else
+ switch_port_external(dev);
+
+ /* set parms and see how this affected our link status */
+ init_phy_fixup(dev);
+ check_link(dev);
+ return 0;
+}
+
+static int netdev_get_regs(struct net_device *dev, u8 *buf)
+{
+ int i;
+ int j;
+ u32 rfcr;
+ u32 *rbuf = (u32 *)buf;
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ /* read non-mii page 0 of registers */
+ for (i = 0; i < NATSEMI_PG0_NREGS/2; i++) {
+ rbuf[i] = readl(ioaddr + i*4);
+ }
+
+ /* read current mii registers */
+ for (i = NATSEMI_PG0_NREGS/2; i < NATSEMI_PG0_NREGS; i++)
+ rbuf[i] = mdio_read(dev, i & 0x1f);
+
+ /* read only the 'magic' registers from page 1 */
+ writew(1, ioaddr + PGSEL);
+ rbuf[i++] = readw(ioaddr + PMDCSR);
+ rbuf[i++] = readw(ioaddr + TSTDAT);
+ rbuf[i++] = readw(ioaddr + DSPCFG);
+ rbuf[i++] = readw(ioaddr + SDCFG);
+ writew(0, ioaddr + PGSEL);
+
+ /* read RFCR indexed registers */
+ rfcr = readl(ioaddr + RxFilterAddr);
+ for (j = 0; j < NATSEMI_RFDR_NREGS; j++) {
+ writel(j*2, ioaddr + RxFilterAddr);
+ rbuf[i++] = readw(ioaddr + RxFilterData);
+ }
+ writel(rfcr, ioaddr + 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;
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ /* eeprom_read reads 16 bits, and indexes by 16 bits */
+ for (i = 0; i < NATSEMI_EEPROM_SIZE/2; i++) {
+ ebuf[i] = eeprom_read(ioaddr, 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 = if_mii(rq);
+ struct netdev_private *np = netdev_priv(dev);
+
+ switch(cmd) {
+ case SIOCGMIIPHY: /* Get address of MII PHY in use. */
+ case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
+ data->phy_id = np->phy_addr_external;
+ /* Fall Through */
+
+ case SIOCGMIIREG: /* Read MII PHY register. */
+ case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
+ /* The phy_id is not enough to uniquely identify
+ * the intended target. Therefore the command is sent to
+ * the given mii on the current port.
+ */
+ if (dev->if_port == PORT_TP) {
+ if ((data->phy_id & 0x1f) == np->phy_addr_external)
+ data->val_out = mdio_read(dev,
+ data->reg_num & 0x1f);
+ else
+ data->val_out = 0;
+ } else {
+ move_int_phy(dev, data->phy_id & 0x1f);
+ data->val_out = miiport_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;
+ if (dev->if_port == PORT_TP) {
+ if ((data->phy_id & 0x1f) == np->phy_addr_external) {
+ if ((data->reg_num & 0x1f) == MII_ADVERTISE)
+ np->advertising = data->val_in;
+ mdio_write(dev, data->reg_num & 0x1f,
+ data->val_in);
+ }
+ } else {
+ if ((data->phy_id & 0x1f) == np->phy_addr_external) {
+ if ((data->reg_num & 0x1f) == MII_ADVERTISE)
+ np->advertising = data->val_in;
+ }
+ move_int_phy(dev, data->phy_id & 0x1f);
+ miiport_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)
+{
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ struct netdev_private *np = netdev_priv(dev);
+
+ if (netif_msg_wol(np))
+ printk(KERN_INFO "%s: remaining active for wake-on-lan\n",
+ 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(WOLPkt | LinkChange, ioaddr + IntrMask);
+ writel(1, ioaddr + IntrEnable);
+ }
+}
+
+static int netdev_close(struct net_device *dev)
+{
+ void __iomem * ioaddr = ns_ioaddr(dev);
+ struct netdev_private *np = netdev_priv(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);
+
+ /*
+ * FIXME: what if someone tries to close a device
+ * that is suspended?
+ * Should we reenable the nic to switch to
+ * the final WOL settings?
+ */
+
+ del_timer_sync(&np->timer);
+ disable_irq(dev->irq);
+ spin_lock_irq(&np->lock);
+ /* Disable interrupts, and flush posted writes */
+ writel(0, ioaddr + IntrEnable);
+ readl(ioaddr + IntrEnable);
+ np->hands_off = 1;
+ spin_unlock_irq(&np->lock);
+ enable_irq(dev->irq);
+
+ free_irq(dev->irq, dev);
+
+ /* Interrupt disabled, interrupt handler released,
+ * queue stopped, timer deleted, rtnl_lock held
+ * All async codepaths that access the driver are disabled.
+ */
+ spin_lock_irq(&np->lock);
+ np->hands_off = 0;
+ 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);
+
+ /* clear the carrier last - an interrupt could reenable it otherwise */
+ netif_carrier_off(dev);
+ netif_stop_queue(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);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ unregister_netdev (dev);
+ pci_release_regions (pdev);
+ iounmap(ioaddr);
+ free_netdev (dev);
+ pci_set_drvdata(pdev, NULL);
+}
+
+#ifdef CONFIG_PM
+
+/*
+ * The ns83815 chip doesn't have explicit RxStop bits.
+ * Kicking the Rx or Tx process for a new packet reenables the Rx process
+ * of the nic, thus this function must be very careful:
+ *
+ * suspend/resume synchronization:
+ * entry points:
+ * netdev_open, netdev_close, netdev_ioctl, set_rx_mode, intr_handler,
+ * start_tx, tx_timeout
+ *
+ * No function accesses the hardware without checking np->hands_off.
+ * the check occurs under spin_lock_irq(&np->lock);
+ * exceptions:
+ * * netdev_ioctl: noncritical access.
+ * * netdev_open: cannot happen due to the device_detach
+ * * 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.
+ *
+ * Interrupts must be disabled, otherwise hands_off can cause irq storms.
+ */
+
+static int natsemi_suspend (struct pci_dev *pdev, pm_message_t state)
+{
+ struct net_device *dev = pci_get_drvdata (pdev);
+ struct netdev_private *np = netdev_priv(dev);
+ void __iomem * ioaddr = ns_ioaddr(dev);
+
+ rtnl_lock();
+ if (netif_running (dev)) {
+ del_timer_sync(&np->timer);
+
+ disable_irq(dev->irq);
+ spin_lock_irq(&np->lock);
+
+ writel(0, ioaddr + IntrEnable);
+ np->hands_off = 1;
+ natsemi_stop_rxtx(dev);
+ netif_stop_queue(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 interrupt
+ */
+ enable_wol_mode(dev, 0);
+ } else {
+ /* Restore PME enable bit unmolested */
+ writel(np->SavedClkRun, ioaddr + ClkRun);
+ }
+ }
+ }
+ 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 = netdev_priv(dev);
+
+ rtnl_lock();
+ if (netif_device_present(dev))
+ goto out;
+ if (netif_running(dev)) {
+ BUG_ON(!np->hands_off);
+ pci_enable_device(pdev);
+ /* pci_power_on(pdev); */
+
+ natsemi_reset(dev);
+ init_ring(dev);
+ disable_irq(dev->irq);
+ spin_lock_irq(&np->lock);
+ np->hands_off = 0;
+ init_registers(dev);
+ netif_device_attach(dev);
+ spin_unlock_irq(&np->lock);
+ enable_irq(dev->irq);
+
+ mod_timer(&np->timer, jiffies + 1*HZ);
+ }
+ 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);
+