diff options
Diffstat (limited to 'drivers/net/ethernet/dlink/sundance.c')
| -rw-r--r-- | drivers/net/ethernet/dlink/sundance.c | 1940 |
1 files changed, 1940 insertions, 0 deletions
diff --git a/drivers/net/ethernet/dlink/sundance.c b/drivers/net/ethernet/dlink/sundance.c new file mode 100644 index 00000000000..dcd7f7a71ad --- /dev/null +++ b/drivers/net/ethernet/dlink/sundance.c @@ -0,0 +1,1940 @@ +/* sundance.c: A Linux device driver for the Sundance ST201 "Alta". */ +/* + Written 1999-2000 by Donald Becker. + + This software may be used and distributed according to the terms of + the GNU General Public License (GPL), incorporated herein by reference. + Drivers based on or derived from this code fall under the GPL and must + retain the authorship, copyright and license notice. This file is not + a complete program and may only be used when the entire operating + system is licensed under the GPL. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + Support and updates available at + http://www.scyld.com/network/sundance.html + [link no longer provides useful info -jgarzik] + Archives of the mailing list are still available at + http://www.beowulf.org/pipermail/netdrivers/ + +*/ + +#define DRV_NAME "sundance" +#define DRV_VERSION "1.2" +#define DRV_RELDATE "11-Sep-2006" + + +/* The user-configurable values. + These may be modified when a driver module is loaded.*/ +static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */ +/* Maximum number of multicast addresses to filter (vs. rx-all-multicast). + Typical is a 64 element hash table based on the Ethernet CRC. */ +static const int multicast_filter_limit = 32; + +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1518 effectively disables this feature. + This chip can receive into offset buffers, so the Alpha does not + need a copy-align. */ +static int rx_copybreak; +static int flowctrl=1; + +/* media[] specifies the media type the NIC operates at. + autosense Autosensing active media. + 10mbps_hd 10Mbps half duplex. + 10mbps_fd 10Mbps full duplex. + 100mbps_hd 100Mbps half duplex. + 100mbps_fd 100Mbps full duplex. + 0 Autosensing active media. + 1 10Mbps half duplex. + 2 10Mbps full duplex. + 3 100Mbps half duplex. + 4 100Mbps full duplex. +*/ +#define MAX_UNITS 8 +static char *media[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, and more than 128 requires modifying the + Tx error recovery. + Large receive rings merely waste memory. */ +#define TX_RING_SIZE 32 +#define TX_QUEUE_LEN (TX_RING_SIZE - 1) /* Limit ring entries actually used. */ +#define RX_RING_SIZE 64 +#define RX_BUDGET 32 +#define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct netdev_desc) +#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct netdev_desc) + +/* Operational parameters that usually are not changed. */ +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (4*HZ) +#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ + +/* Include files, designed to support most kernel versions 2.0.0 and later. */ +#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/interrupt.h> +#include <linux/pci.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <asm/uaccess.h> +#include <asm/processor.h> /* Processor type for cache alignment. */ +#include <asm/io.h> +#include <linux/delay.h> +#include <linux/spinlock.h> +#include <linux/dma-mapping.h> +#include <linux/crc32.h> +#include <linux/ethtool.h> +#include <linux/mii.h> + +/* These identify the driver base version and may not be removed. */ +static const char version[] __devinitconst = + KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE + " Written by Donald Becker\n"; + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("Sundance Alta Ethernet driver"); +MODULE_LICENSE("GPL"); + +module_param(debug, int, 0); +module_param(rx_copybreak, int, 0); +module_param_array(media, charp, NULL, 0); +module_param(flowctrl, int, 0); +MODULE_PARM_DESC(debug, "Sundance Alta debug level (0-5)"); +MODULE_PARM_DESC(rx_copybreak, "Sundance Alta copy breakpoint for copy-only-tiny-frames"); +MODULE_PARM_DESC(flowctrl, "Sundance Alta flow control [0|1]"); + +/* + Theory of Operation + +I. Board Compatibility + +This driver is designed for the Sundance Technologies "Alta" ST201 chip. + +II. Board-specific settings + +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. +Some chips explicitly use only 2^N sized rings, while others use a +'next descriptor' pointer that the driver forms into rings. + +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 the IP header at offset 14 in an +ethernet frame isn't longword aligned for further processing. +Unaligned buffers are permitted by the Sundance hardware, so +frames are received into the skbuff at an offset of "+2", 16-byte aligning +the IP header. + +IIId. Synchronization + +The driver runs as two independent, single-threaded flows of control. One +is the send-packet routine, which enforces single-threaded use by the +dev->tbusy flag. The other thread is the interrupt handler, which is single +threaded by the hardware and interrupt handling software. + +The send packet thread has partial control over the Tx ring and 'dev->tbusy' +flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next +queue slot is empty, it clears the tbusy flag when finished otherwise it sets +the 'lp->tx_full' flag. + +The interrupt handler has exclusive control over the Rx ring and records stats +from the Tx ring. After reaping the stats, it marks the Tx queue entry as +empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it +clears both the tx_full and tbusy flags. + +IV. Notes + +IVb. References + +The Sundance ST201 datasheet, preliminary version. +The Kendin KS8723 datasheet, preliminary version. +The ICplus IP100 datasheet, preliminary version. +http://www.scyld.com/expert/100mbps.html +http://www.scyld.com/expert/NWay.html + +IVc. Errata + +*/ + +/* Work-around for Kendin chip bugs. */ +#ifndef CONFIG_SUNDANCE_MMIO +#define USE_IO_OPS 1 +#endif + +static DEFINE_PCI_DEVICE_TABLE(sundance_pci_tbl) = { + { 0x1186, 0x1002, 0x1186, 0x1002, 0, 0, 0 }, + { 0x1186, 0x1002, 0x1186, 0x1003, 0, 0, 1 }, + { 0x1186, 0x1002, 0x1186, 0x1012, 0, 0, 2 }, + { 0x1186, 0x1002, 0x1186, 0x1040, 0, 0, 3 }, + { 0x1186, 0x1002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 }, + { 0x13F0, 0x0201, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 }, + { 0x13F0, 0x0200, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 }, + { } +}; +MODULE_DEVICE_TABLE(pci, sundance_pci_tbl); + +enum { + netdev_io_size = 128 +}; + +struct pci_id_info { + const char *name; +}; +static const struct pci_id_info pci_id_tbl[] __devinitdata = { + {"D-Link DFE-550TX FAST Ethernet Adapter"}, + {"D-Link DFE-550FX 100Mbps Fiber-optics Adapter"}, + {"D-Link DFE-580TX 4 port Server Adapter"}, + {"D-Link DFE-530TXS FAST Ethernet Adapter"}, + {"D-Link DL10050-based FAST Ethernet Adapter"}, + {"Sundance Technology Alta"}, + {"IC Plus Corporation IP100A FAST Ethernet Adapter"}, + { } /* terminate list. */ +}; + +/* This driver was written to use PCI memory space, however x86-oriented + hardware often uses I/O space accesses. */ + +/* 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. The name can only partially document the semantics and make + the driver longer and more difficult to read. + In general, only the important configuration values or bits changed + multiple times should be defined symbolically. +*/ +enum alta_offsets { + DMACtrl = 0x00, + TxListPtr = 0x04, + TxDMABurstThresh = 0x08, + TxDMAUrgentThresh = 0x09, + TxDMAPollPeriod = 0x0a, + RxDMAStatus = 0x0c, + RxListPtr = 0x10, + DebugCtrl0 = 0x1a, + DebugCtrl1 = 0x1c, + RxDMABurstThresh = 0x14, + RxDMAUrgentThresh = 0x15, + RxDMAPollPeriod = 0x16, + LEDCtrl = 0x1a, + ASICCtrl = 0x30, + EEData = 0x34, + EECtrl = 0x36, + FlashAddr = 0x40, + FlashData = 0x44, + TxStatus = 0x46, + TxFrameId = 0x47, + DownCounter = 0x18, + IntrClear = 0x4a, + IntrEnable = 0x4c, + IntrStatus = 0x4e, + MACCtrl0 = 0x50, + MACCtrl1 = 0x52, + StationAddr = 0x54, + MaxFrameSize = 0x5A, + RxMode = 0x5c, + MIICtrl = 0x5e, + MulticastFilter0 = 0x60, + MulticastFilter1 = 0x64, + RxOctetsLow = 0x68, + RxOctetsHigh = 0x6a, + TxOctetsLow = 0x6c, + TxOctetsHigh = 0x6e, + TxFramesOK = 0x70, + RxFramesOK = 0x72, + StatsCarrierError = 0x74, + StatsLateColl = 0x75, + StatsMultiColl = 0x76, + StatsOneColl = 0x77, + StatsTxDefer = 0x78, + RxMissed = 0x79, + StatsTxXSDefer = 0x7a, + StatsTxAbort = 0x7b, + StatsBcastTx = 0x7c, + StatsBcastRx = 0x7d, + StatsMcastTx = 0x7e, + StatsMcastRx = 0x7f, + /* Aliased and bogus values! */ + RxStatus = 0x0c, +}; + +#define ASIC_HI_WORD(x) ((x) + 2) + +enum ASICCtrl_HiWord_bit { + GlobalReset = 0x0001, + RxReset = 0x0002, + TxReset = 0x0004, + DMAReset = 0x0008, + FIFOReset = 0x0010, + NetworkReset = 0x0020, + HostReset = 0x0040, + ResetBusy = 0x0400, +}; + +/* Bits in the interrupt status/mask registers. */ +enum intr_status_bits { + IntrSummary=0x0001, IntrPCIErr=0x0002, IntrMACCtrl=0x0008, + IntrTxDone=0x0004, IntrRxDone=0x0010, IntrRxStart=0x0020, + IntrDrvRqst=0x0040, + StatsMax=0x0080, LinkChange=0x0100, + IntrTxDMADone=0x0200, IntrRxDMADone=0x0400, +}; + +/* Bits in the RxMode register. */ +enum rx_mode_bits { + AcceptAllIPMulti=0x20, AcceptMultiHash=0x10, AcceptAll=0x08, + AcceptBroadcast=0x04, AcceptMulticast=0x02, AcceptMyPhys=0x01, +}; +/* Bits in MACCtrl. */ +enum mac_ctrl0_bits { + EnbFullDuplex=0x20, EnbRcvLargeFrame=0x40, + EnbFlowCtrl=0x100, EnbPassRxCRC=0x200, +}; +enum mac_ctrl1_bits { + StatsEnable=0x0020, StatsDisable=0x0040, StatsEnabled=0x0080, + TxEnable=0x0100, TxDisable=0x0200, TxEnabled=0x0400, + RxEnable=0x0800, RxDisable=0x1000, RxEnabled=0x2000, +}; + +/* The Rx and Tx buffer descriptors. */ +/* Note that using only 32 bit fields simplifies conversion to big-endian + architectures. */ +struct netdev_desc { + __le32 next_desc; + __le32 status; + struct desc_frag { __le32 addr, length; } frag[1]; +}; + +/* Bits in netdev_desc.status */ +enum desc_status_bits { + DescOwn=0x8000, + DescEndPacket=0x4000, + DescEndRing=0x2000, + LastFrag=0x80000000, + DescIntrOnTx=0x8000, + DescIntrOnDMADone=0x80000000, + DisableAlign = 0x00000001, +}; + +#define PRIV_ALIGN 15 /* Required alignment mask */ +/* Use __attribute__((aligned (L1_CACHE_BYTES))) to maintain alignment + within the structure. */ +#define MII_CNT 4 +struct netdev_private { + /* Descriptor rings first for alignment. */ + struct netdev_desc *rx_ring; + struct netdev_desc *tx_ring; + struct sk_buff* rx_skbuff[RX_RING_SIZE]; + struct sk_buff* tx_skbuff[TX_RING_SIZE]; + dma_addr_t tx_ring_dma; + dma_addr_t rx_ring_dma; + struct timer_list timer; /* Media monitoring timer. */ + /* ethtool extra stats */ + struct { + u64 tx_multiple_collisions; + u64 tx_single_collisions; + u64 tx_late_collisions; + u64 tx_deferred; + u64 tx_deferred_excessive; + u64 tx_aborted; + u64 tx_bcasts; + u64 rx_bcasts; + u64 tx_mcasts; + u64 rx_mcasts; + } xstats; + /* Frequently used values: keep some adjacent for cache effect. */ + spinlock_t lock; + int msg_enable; + int chip_id; + unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */ + unsigned int rx_buf_sz; /* Based on MTU+slack. */ + struct netdev_desc *last_tx; /* Last Tx descriptor used. */ + unsigned int cur_tx, dirty_tx; + /* These values are keep track of the transceiver/media in use. */ + unsigned int flowctrl:1; + unsigned int default_port:4; /* Last dev->if_port value. */ + unsigned int an_enable:1; + unsigned int speed; + struct tasklet_struct rx_tasklet; + struct tasklet_struct tx_tasklet; + int budget; + int cur_task; + /* Multicast and receive mode. */ + spinlock_t mcastlock; /* SMP lock multicast updates. */ + u16 mcast_filter[4]; + /* MII transceiver section. */ + struct mii_if_info mii_if; + int mii_preamble_required; + unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */ + struct pci_dev *pci_dev; + void __iomem *base; + spinlock_t statlock; +}; + +/* The station address location in the EEPROM. */ +#define EEPROM_SA_OFFSET 0x10 +#define DEFAULT_INTR (IntrRxDMADone | IntrPCIErr | \ + IntrDrvRqst | IntrTxDone | StatsMax | \ + LinkChange) + +static int change_mtu(struct net_device *dev, int new_mtu); +static int eeprom_read(void __iomem *ioaddr, int location); +static int mdio_read(struct net_device *dev, int phy_id, int location); +static void mdio_write(struct net_device *dev, int phy_id, int location, int value); +static int mdio_wait_link(struct net_device *dev, int wait); +static int netdev_open(struct net_device *dev); +static void check_duplex(struct net_device *dev); +static void netdev_timer(unsigned long data); +static void tx_timeout(struct net_device *dev); +static void init_ring(struct net_device *dev); +static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev); +static int reset_tx (struct net_device *dev); +static irqreturn_t intr_handler(int irq, void *dev_instance); +static void rx_poll(unsigned long data); +static void tx_poll(unsigned long data); +static void refill_rx (struct net_device *dev); +static void netdev_error(struct net_device *dev, int intr_status); +static void netdev_error(struct net_device *dev, int intr_status); +static void set_rx_mode(struct net_device *dev); +static int __set_mac_addr(struct net_device *dev); +static int sundance_set_mac_addr(struct net_device *dev, void *data); +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_close(struct net_device *dev); +static const struct ethtool_ops ethtool_ops; + +static void sundance_reset(struct net_device *dev, unsigned long reset_cmd) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base + ASICCtrl; + int countdown; + + /* ST201 documentation states ASICCtrl is a 32bit register */ + iowrite32 (reset_cmd | ioread32 (ioaddr), ioaddr); + /* ST201 documentation states reset can take up to 1 ms */ + countdown = 10 + 1; + while (ioread32 (ioaddr) & (ResetBusy << 16)) { + if (--countdown == 0) { + printk(KERN_WARNING "%s : reset not completed !!\n", dev->name); + break; + } + udelay(100); + } +} + +static const struct net_device_ops netdev_ops = { + .ndo_open = netdev_open, + .ndo_stop = netdev_close, + .ndo_start_xmit = start_tx, + .ndo_get_stats = get_stats, + .ndo_set_rx_mode = set_rx_mode, + .ndo_do_ioctl = netdev_ioctl, + .ndo_tx_timeout = tx_timeout, + .ndo_change_mtu = change_mtu, + .ndo_set_mac_address = sundance_set_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int __devinit sundance_probe1 (struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct net_device *dev; + struct netdev_private *np; + static int card_idx; + int chip_idx = ent->driver_data; + int irq; + int i; + void __iomem *ioaddr; + u16 mii_ctl; + void *ring_space; + dma_addr_t ring_dma; +#ifdef USE_IO_OPS + int bar = 0; +#else + int bar = 1; +#endif + int phy, phy_end, phy_idx = 0; + +/* 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 + + if (pci_enable_device(pdev)) + return -EIO; + pci_set_master(pdev); + + irq = pdev->irq; + + dev = alloc_etherdev(sizeof(*np)); + if (!dev) + return -ENOMEM; + SET_NETDEV_DEV(dev, &pdev->dev); + + if (pci_request_regions(pdev, DRV_NAME)) + goto err_out_netdev; + + ioaddr = pci_iomap(pdev, bar, netdev_io_size); + if (!ioaddr) + goto err_out_res; + + for (i = 0; i < 3; i++) + ((__le16 *)dev->dev_addr)[i] = + cpu_to_le16(eeprom_read(ioaddr, i + EEPROM_SA_OFFSET)); + memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len); + + dev->base_addr = (unsigned long)ioaddr; + dev->irq = irq; + + np = netdev_priv(dev); + np->base = ioaddr; + np->pci_dev = pdev; + np->chip_id = chip_idx; + np->msg_enable = (1 << debug) - 1; + spin_lock_init(&np->lock); + spin_lock_init(&np->statlock); + tasklet_init(&np->rx_tasklet, rx_poll, (unsigned long)dev); + tasklet_init(&np->tx_tasklet, tx_poll, (unsigned long)dev); + + ring_space = dma_alloc_coherent(&pdev->dev, TX_TOTAL_SIZE, + &ring_dma, GFP_KERNEL); + if (!ring_space) + goto err_out_cleardev; + np->tx_ring = (struct netdev_desc *)ring_space; + np->tx_ring_dma = ring_dma; + + ring_space = dma_alloc_coherent(&pdev->dev, RX_TOTAL_SIZE, + &ring_dma, GFP_KERNEL); + if (!ring_space) + goto err_out_unmap_tx; + np->rx_ring = (struct netdev_desc *)ring_space; + np->rx_ring_dma = ring_dma; + + np->mii_if.dev = dev; + np->mii_if.mdio_read = mdio_read; + np->mii_if.mdio_write = mdio_write; + np->mii_if.phy_id_mask = 0x1f; + np->mii_if.reg_num_mask = 0x1f; + + /* The chip-specific entries in the device structure. */ + dev->netdev_ops = &netdev_ops; + SET_ETHTOOL_OPS(dev, ðtool_ops); + dev->watchdog_timeo = TX_TIMEOUT; + + pci_set_drvdata(pdev, dev); + + i = register_netdev(dev); + if (i) + goto err_out_unmap_rx; + + printk(KERN_INFO "%s: %s at %p, %pM, IRQ %d.\n", + dev->name, pci_id_tbl[chip_idx].name, ioaddr, + dev->dev_addr, irq); + + np->phys[0] = 1; /* Default setting */ + np->mii_preamble_required++; + + /* + * It seems some phys doesn't deal well with address 0 being accessed + * first + */ + if (sundance_pci_tbl[np->chip_id].device == 0x0200) { + phy = 0; + phy_end = 31; + } else { + phy = 1; + phy_end = 32; /* wraps to zero, due to 'phy & 0x1f' */ + } + for (; phy <= phy_end && phy_idx < MII_CNT; phy++) { + int phyx = phy & 0x1f; + int mii_status = mdio_read(dev, phyx, MII_BMSR); + if (mii_status != 0xffff && mii_status != 0x0000) { + np->phys[phy_idx++] = phyx; + np->mii_if.advertising = mdio_read(dev, phyx, MII_ADVERTISE); + if ((mii_status & 0x0040) == 0) + np->mii_preamble_required++; + printk(KERN_INFO "%s: MII PHY found at address %d, status " + "0x%4.4x advertising %4.4x.\n", + dev->name, phyx, mii_status, np->mii_if.advertising); + } + } + np->mii_preamble_required--; + + if (phy_idx == 0) { + printk(KERN_INFO "%s: No MII transceiver found, aborting. ASIC status %x\n", + dev->name, ioread32(ioaddr + ASICCtrl)); + goto err_out_unregister; + } + + np->mii_if.phy_id = np->phys[0]; + + /* Parse override configuration */ + np->an_enable = 1; + if (card_idx < MAX_UNITS) { + if (media[card_idx] != NULL) { + np->an_enable = 0; + if (strcmp (media[card_idx], "100mbps_fd") == 0 || + strcmp (media[card_idx], "4") == 0) { + np->speed = 100; + np->mii_if.full_duplex = 1; + } else if (strcmp (media[card_idx], "100mbps_hd") == 0 || + strcmp (media[card_idx], "3") == 0) { + np->speed = 100; + np->mii_if.full_duplex = 0; + } else if (strcmp (media[card_idx], "10mbps_fd") == 0 || + strcmp (media[card_idx], "2") == 0) { + np->speed = 10; + np->mii_if.full_duplex = 1; + } else if (strcmp (media[card_idx], "10mbps_hd") == 0 || + strcmp (media[card_idx], "1") == 0) { + np->speed = 10; + np->mii_if.full_duplex = 0; + } else { + np->an_enable = 1; + } + } + if (flowctrl == 1) + np->flowctrl = 1; + } + + /* Fibre PHY? */ + if (ioread32 (ioaddr + ASICCtrl) & 0x80) { + /* Default 100Mbps Full */ + if (np->an_enable) { + np->speed = 100; + np->mii_if.full_duplex = 1; + np->an_enable = 0; + } + } + /* Reset PHY */ + mdio_write (dev, np->phys[0], MII_BMCR, BMCR_RESET); + mdelay (300); + /* If flow control enabled, we need to advertise it.*/ + if (np->flowctrl) + mdio_write (dev, np->phys[0], MII_ADVERTISE, np->mii_if.advertising | 0x0400); + mdio_write (dev, np->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART); + /* Force media type */ + if (!np->an_enable) { + mii_ctl = 0; + mii_ctl |= (np->speed == 100) ? BMCR_SPEED100 : 0; + mii_ctl |= (np->mii_if.full_duplex) ? BMCR_FULLDPLX : 0; + mdio_write (dev, np->phys[0], MII_BMCR, mii_ctl); + printk (KERN_INFO "Override speed=%d, %s duplex\n", + np->speed, np->mii_if.full_duplex ? "Full" : "Half"); + + } + + /* Perhaps move the reset here? */ + /* Reset the chip to erase previous misconfiguration. */ + if (netif_msg_hw(np)) + printk("ASIC Control is %x.\n", ioread32(ioaddr + ASICCtrl)); + sundance_reset(dev, 0x00ff << 16); + if (netif_msg_hw(np)) + printk("ASIC Control is now %x.\n", ioread32(ioaddr + ASICCtrl)); + + card_idx++; + return 0; + +err_out_unregister: + unregister_netdev(dev); +err_out_unmap_rx: + dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, + np->rx_ring, np->rx_ring_dma); +err_out_unmap_tx: + dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, + np->tx_ring, np->tx_ring_dma); +err_out_cleardev: + pci_set_drvdata(pdev, NULL); + pci_iounmap(pdev, ioaddr); +err_out_res: + pci_release_regions(pdev); +err_out_netdev: + free_netdev (dev); + return -ENODEV; +} + +static int change_mtu(struct net_device *dev, int new_mtu) +{ + if ((new_mtu < 68) || (new_mtu > 8191)) /* Set by RxDMAFrameLen */ + return -EINVAL; + if (netif_running(dev)) + return -EBUSY; + dev->mtu = new_mtu; + return 0; +} + +#define eeprom_delay(ee_addr) ioread32(ee_addr) +/* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. */ +static int __devinit eeprom_read(void __iomem *ioaddr, int location) +{ + int boguscnt = 10000; /* Typical 1900 ticks. */ + iowrite16(0x0200 | (location & 0xff), ioaddr + EECtrl); + do { + eeprom_delay(ioaddr + EECtrl); + if (! (ioread16(ioaddr + EECtrl) & 0x8000)) { + return ioread16(ioaddr + EEData); + } + } while (--boguscnt > 0); + return 0; +} + +/* MII transceiver control section. + Read and write the MII registers using software-generated serial + MDIO protocol. See the MII specifications or DP83840A data sheet + for details. + + The maximum data clock rate is 2.5 Mhz. The minimum timing is usually + met by back-to-back 33Mhz PCI cycles. */ +#define mdio_delay() ioread8(mdio_addr) + +enum mii_reg_bits { + MDIO_ShiftClk=0x0001, MDIO_Data=0x0002, MDIO_EnbOutput=0x0004, +}; +#define MDIO_EnbIn (0) +#define MDIO_WRITE0 (MDIO_EnbOutput) +#define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput) + +/* Generate the preamble required for initial synchronization and + a few older transceivers. */ +static void mdio_sync(void __iomem *mdio_addr) +{ + int bits = 32; + + /* Establish sync by sending at least 32 logic ones. */ + while (--bits >= 0) { + iowrite8(MDIO_WRITE1, mdio_addr); + mdio_delay(); + iowrite8(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr); + mdio_delay(); + } +} + +static int mdio_read(struct net_device *dev, int phy_id, int location) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *mdio_addr = np->base + MIICtrl; + int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location; + int i, retval = 0; + + if (np->mii_preamble_required) + mdio_sync(mdio_addr); + + /* Shift the read command bits out. */ + for (i = 15; i >= 0; i--) { + int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0; + + iowrite8(dataval, mdio_addr); + mdio_delay(); + iowrite8(dataval | MDIO_ShiftClk, mdio_addr); + mdio_delay(); + } + /* Read the two transition, 16 data, and wire-idle bits. */ + for (i = 19; i > 0; i--) { + iowrite8(MDIO_EnbIn, mdio_addr); + mdio_delay(); + retval = (retval << 1) | ((ioread8(mdio_addr) & MDIO_Data) ? 1 : 0); + iowrite8(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr); + mdio_delay(); + } + return (retval>>1) & 0xffff; +} + +static void mdio_write(struct net_device *dev, int phy_id, int location, int value) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *mdio_addr = np->base + MIICtrl; + int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value; + int i; + + if (np->mii_preamble_required) + mdio_sync(mdio_addr); + + /* Shift the command bits out. */ + for (i = 31; i >= 0; i--) { + int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0; + + iowrite8(dataval, mdio_addr); + mdio_delay(); + iowrite8(dataval | MDIO_ShiftClk, mdio_addr); + mdio_delay(); + } + /* Clear out extra bits. */ + for (i = 2; i > 0; i--) { + iowrite8(MDIO_EnbIn, mdio_addr); + mdio_delay(); + iowrite8(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr); + mdio_delay(); + } +} + +static int mdio_wait_link(struct net_device *dev, int wait) +{ + int bmsr; + int phy_id; + struct netdev_private *np; + + np = netdev_priv(dev); + phy_id = np->phys[0]; + + do { + bmsr = mdio_read(dev, phy_id, MII_BMSR); + if (bmsr & 0x0004) + return 0; + mdelay(1); + } while (--wait > 0); + return -1; +} + +static int netdev_open(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + unsigned long flags; + int i; + + /* Do we need to reset the chip??? */ + + i = request_irq(dev->irq, intr_handler, IRQF_SHARED, 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); + init_ring(dev); + + iowrite32(np->rx_ring_dma, ioaddr + RxListPtr); + /* The Tx list pointer is written as packets are queued. */ + + /* Initialize other registers. */ + __set_mac_addr(dev); +#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) + iowrite16(dev->mtu + 18, ioaddr + MaxFrameSize); +#else + iowrite16(dev->mtu + 14, ioaddr + MaxFrameSize); +#endif + if (dev->mtu > 2047) + iowrite32(ioread32(ioaddr + ASICCtrl) | 0x0C, ioaddr + ASICCtrl); + + /* Configure the PCI bus bursts and FIFO thresholds. */ + + if (dev->if_port == 0) + dev->if_port = np->default_port; + + spin_lock_init(&np->mcastlock); + + set_rx_mode(dev); + iowrite16(0, ioaddr + IntrEnable); + iowrite16(0, ioaddr + DownCounter); + /* Set the chip to poll every N*320nsec. */ + iowrite8(100, ioaddr + RxDMAPollPeriod); + iowrite8(127, ioaddr + TxDMAPollPeriod); + /* Fix DFE-580TX packet drop issue */ + if (np->pci_dev->revision >= 0x14) + iowrite8(0x01, ioaddr + DebugCtrl1); + netif_start_queue(dev); + + spin_lock_irqsave(&np->lock, flags); + reset_tx(dev); + spin_unlock_irqrestore(&np->lock, flags); + + iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1); + + if (netif_msg_ifup(np)) + printk(KERN_DEBUG "%s: Done netdev_open(), status: Rx %x Tx %x " + "MAC Control %x, %4.4x %4.4x.\n", + dev->name, ioread32(ioaddr + RxStatus), ioread8(ioaddr + TxStatus), + ioread32(ioaddr + MACCtrl0), + ioread16(ioaddr + MACCtrl1), ioread16(ioaddr + MACCtrl0)); + + /* Set the timer to check for link beat. */ + init_timer(&np->timer); + np->timer.expires = jiffies + 3*HZ; + np->timer.data = (unsigned long)dev; + np->timer.function = netdev_timer; /* timer handler */ + add_timer(&np->timer); + + /* Enable interrupts by setting the interrupt mask. */ + iowrite16(DEFAULT_INTR, ioaddr + IntrEnable); + + return 0; +} + +static void check_duplex(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + int mii_lpa = mdio_read(dev, np->phys[0], MII_LPA); + int negotiated = mii_lpa & np->mii_if.advertising; + int duplex; + + /* Force media */ + if (!np->an_enable || mii_lpa == 0xffff) { + if (np->mii_if.full_duplex) + iowrite16 (ioread16 (ioaddr + MACCtrl0) | EnbFullDuplex, + ioaddr + MACCtrl0); + return; + } + + /* Autonegotiation */ + duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040; + if (np->mii_if.full_duplex != duplex) { + np->mii_if.full_duplex = duplex; + if (netif_msg_link(np)) + printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d " + "negotiated capability %4.4x.\n", dev->name, + duplex ? "full" : "half", np->phys[0], negotiated); + iowrite16(ioread16(ioaddr + MACCtrl0) | (duplex ? 0x20 : 0), ioaddr + MACCtrl0); + } +} + +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 = np->base; + int next_tick = 10*HZ; + + if (netif_msg_timer(np)) { + printk(KERN_DEBUG "%s: Media selection timer tick, intr status %4.4x, " + "Tx %x Rx %x.\n", + dev->name, ioread16(ioaddr + IntrEnable), + ioread8(ioaddr + TxStatus), ioread32(ioaddr + RxStatus)); + } + check_duplex(dev); + np->timer.expires = jiffies + next_tick; + add_timer(&np->timer); +} + +static void tx_timeout(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + unsigned long flag; + + netif_stop_queue(dev); + tasklet_disable(&np->tx_tasklet); + iowrite16(0, ioaddr + IntrEnable); + printk(KERN_WARNING "%s: Transmit timed out, TxStatus %2.2x " + "TxFrameId %2.2x," + " resetting...\n", dev->name, ioread8(ioaddr + TxStatus), + ioread8(ioaddr + TxFrameId)); + + { + int i; + for (i=0; i<TX_RING_SIZE; i++) { + printk(KERN_DEBUG "%02x %08llx %08x %08x(%02x) %08x %08x\n", i, + (unsigned long long)(np->tx_ring_dma + i*sizeof(*np->tx_ring)), + le32_to_cpu(np->tx_ring[i].next_desc), + le32_to_cpu(np->tx_ring[i].status), + (le32_to_cpu(np->tx_ring[i].status) >> 2) & 0xff, + le32_to_cpu(np->tx_ring[i].frag[0].addr), + le32_to_cpu(np->tx_ring[i].frag[0].length)); + } + printk(KERN_DEBUG "TxListPtr=%08x netif_queue_stopped=%d\n", + ioread32(np->base + TxListPtr), + netif_queue_stopped(dev)); + printk(KERN_DEBUG "cur_tx=%d(%02x) dirty_tx=%d(%02x)\n", + np->cur_tx, np->cur_tx % TX_RING_SIZE, + np->dirty_tx, np->dirty_tx % TX_RING_SIZE); + printk(KERN_DEBUG "cur_rx=%d dirty_rx=%d\n", np->cur_rx, np->dirty_rx); + printk(KERN_DEBUG "cur_task=%d\n", np->cur_task); + } + spin_lock_irqsave(&np->lock, flag); + + /* Stop and restart the chip's Tx processes . */ + reset_tx(dev); + spin_unlock_irqrestore(&np->lock, flag); + + dev->if_port = 0; + + dev->trans_start = jiffies; /* prevent tx timeout */ + dev->stats.tx_errors++; + if (np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) { + netif_wake_queue(dev); + } + iowrite16(DEFAULT_INTR, ioaddr + IntrEnable); + tasklet_enable(&np->tx_tasklet); +} + + +/* 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; + + np->cur_rx = np->cur_tx = 0; + np->dirty_rx = np->dirty_tx = 0; + np->cur_task = 0; + + np->rx_buf_sz = (dev->mtu <= 1520 ? PKT_BUF_SZ : dev->mtu + 16); + + /* Initialize all Rx descriptors. */ + for (i = 0; i < RX_RING_SIZE; i++) { + np->rx_ring[i].next_desc = cpu_to_le32(np->rx_ring_dma + + ((i+1)%RX_RING_SIZE)*sizeof(*np->rx_ring)); + np->rx_ring[i].status = 0; + np->rx_ring[i].frag[0].length = 0; + np->rx_skbuff[i] = NULL; + } + + /* Fill in the Rx buffers. Handle allocation failure gracefully. */ + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz + 2); + np->rx_skbuff[i] = skb; + if (skb == NULL) + break; + skb->dev = dev; /* Mark as being used by this device. */ + skb_reserve(skb, 2); /* 16 byte align the IP header. */ + np->rx_ring[i].frag[0].addr = cpu_to_le32( + dma_map_single(&np->pci_dev->dev, skb->data, + np->rx_buf_sz, DMA_FROM_DEVICE)); + if (dma_mapping_error(&np->pci_dev->dev, + np->rx_ring[i].frag[0].addr)) { + dev_kfree_skb(skb); + np->rx_skbuff[i] = NULL; + break; + } + np->rx_ring[i].frag[0].length = cpu_to_le32(np->rx_buf_sz | LastFrag); + } + np->dirty_rx = (unsigned int)(i - RX_RING_SIZE); + + for (i = 0; i < TX_RING_SIZE; i++) { + np->tx_skbuff[i] = NULL; + np->tx_ring[i].status = 0; + } +} + +static void tx_poll (unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct netdev_private *np = netdev_priv(dev); + unsigned head = np->cur_task % TX_RING_SIZE; + struct netdev_desc *txdesc = + &np->tx_ring[(np->cur_tx - 1) % TX_RING_SIZE]; + + /* Chain the next pointer */ + for (; np->cur_tx - np->cur_task > 0; np->cur_task++) { + int entry = np->cur_task % TX_RING_SIZE; + txdesc = &np->tx_ring[entry]; + if (np->last_tx) { + np->last_tx->next_desc = cpu_to_le32(np->tx_ring_dma + + entry*sizeof(struct netdev_desc)); + } + np->last_tx = txdesc; + } + /* Indicate the latest descriptor of tx ring */ + txdesc->status |= cpu_to_le32(DescIntrOnTx); + + if (ioread32 (np->base + TxListPtr) == 0) + iowrite32 (np->tx_ring_dma + head * sizeof(struct netdev_desc), + np->base + TxListPtr); +} + +static netdev_tx_t +start_tx (struct sk_buff *skb, struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + struct netdev_desc *txdesc; + unsigned entry; + + /* Calculate the next Tx descriptor entry. */ + entry = np->cur_tx % TX_RING_SIZE; + np->tx_skbuff[entry] = skb; + txdesc = &np->tx_ring[entry]; + + txdesc->next_desc = 0; + txdesc->status = cpu_to_le32 ((entry << 2) | DisableAlign); + txdesc->frag[0].addr = cpu_to_le32(dma_map_single(&np->pci_dev->dev, + skb->data, skb->len, DMA_TO_DEVICE)); + if (dma_mapping_error(&np->pci_dev->dev, + txdesc->frag[0].addr)) + goto drop_frame; + txdesc->frag[0].length = cpu_to_le32 (skb->len | LastFrag); + + /* Increment cur_tx before tasklet_schedule() */ + np->cur_tx++; + mb(); + /* Schedule a tx_poll() task */ + tasklet_schedule(&np->tx_tasklet); + + /* On some architectures: explicitly flush cache lines here. */ + if (np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 1 && + !netif_queue_stopped(dev)) { + /* do nothing */ + } else { + netif_stop_queue (dev); + } + 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 NETDEV_TX_OK; + +drop_frame: + dev_kfree_skb(skb); + np->tx_skbuff[entry] = NULL; + dev->stats.tx_dropped++; + return NETDEV_TX_OK; +} + +/* Reset hardware tx and free all of tx buffers */ +static int +reset_tx (struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + struct sk_buff *skb; + int i; + + /* Reset tx logic, TxListPtr will be cleaned */ + iowrite16 (TxDisable, ioaddr + MACCtrl1); + sundance_reset(dev, (NetworkReset|FIFOReset|DMAReset|TxReset) << 16); + + /* free all tx skbuff */ + for (i = 0; i < TX_RING_SIZE; i++) { + np->tx_ring[i].next_desc = 0; + + skb = np->tx_skbuff[i]; + if (skb) { + dma_unmap_single(&np->pci_dev->dev, + le32_to_cpu(np->tx_ring[i].frag[0].addr), + skb->len, DMA_TO_DEVICE); + dev_kfree_skb_any(skb); + np->tx_skbuff[i] = NULL; + dev->stats.tx_dropped++; + } + } + np->cur_tx = np->dirty_tx = 0; + np->cur_task = 0; + + np->last_tx = NULL; + iowrite8(127, ioaddr + TxDMAPollPeriod); + + iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1); + return 0; +} + +/* The interrupt handler cleans up after the Tx thread, + and schedule a Rx thread work */ +static irqreturn_t intr_handler(int irq, void *dev_instance) +{ + struct net_device *dev = (struct net_device *)dev_instance; + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + int hw_frame_id; + int tx_cnt; + int tx_status; + int handled = 0; + int i; + + + do { + int intr_status = ioread16(ioaddr + IntrStatus); + iowrite16(intr_status, ioaddr + IntrStatus); + + if (netif_msg_intr(np)) + printk(KERN_DEBUG "%s: Interrupt, status %4.4x.\n", + dev->name, intr_status); + + if (!(intr_status & DEFAULT_INTR)) + break; + + handled = 1; + + if (intr_status & (IntrRxDMADone)) { + iowrite16(DEFAULT_INTR & ~(IntrRxDone|IntrRxDMADone), + ioaddr + IntrEnable); + if (np->budget < 0) + np->budget = RX_BUDGET; + tasklet_schedule(&np->rx_tasklet); + } + if (intr_status & (IntrTxDone | IntrDrvRqst)) { + tx_status = ioread16 (ioaddr + TxStatus); + for (tx_cnt=32; tx_status & 0x80; --tx_cnt) { + if (netif_msg_tx_done(np)) + printk + ("%s: Transmit status is %2.2x.\n", + dev->name, tx_status); + if (tx_status & 0x1e) { + if (netif_msg_tx_err(np)) + printk("%s: Transmit error status %4.4x.\n", + dev->name, tx_status); + dev->stats.tx_errors++; + if (tx_status & 0x10) + dev->stats.tx_fifo_errors++; + if (tx_status & 0x08) + dev->stats.collisions++; + if (tx_status & 0x04) + dev->stats.tx_fifo_errors++; + if (tx_status & 0x02) + dev->stats.tx_window_errors++; + + /* + ** This reset has been verified on + ** DFE-580TX boards ! phdm@macqel.be. + */ + if (tx_status & 0x10) { /* TxUnderrun */ + /* Restart Tx FIFO and transmitter */ + sundance_reset(dev, (NetworkReset|FIFOReset|TxReset) << 16); + /* No need to reset the Tx pointer here */ + } + /* Restart the Tx. Need to make sure tx enabled */ + i = 10; + do { + iowrite16(ioread16(ioaddr + MACCtrl1) | TxEnable, ioaddr + MACCtrl1); + if (ioread16(ioaddr + MACCtrl1) & TxEnabled) + break; + mdelay(1); + } while (--i); + } + /* Yup, this is a documentation bug. It cost me *hours*. */ + iowrite16 (0, ioaddr + TxStatus); + if (tx_cnt < 0) { + iowrite32(5000, ioaddr + DownCounter); + break; + } + tx_status = ioread16 (ioaddr + TxStatus); + } + hw_frame_id = (tx_status >> 8) & 0xff; + } else { + hw_frame_id = ioread8(ioaddr + TxFrameId); + } + + if (np->pci_dev->revision >= 0x14) { + spin_lock(&np->lock); + for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) { + int entry = np->dirty_tx % TX_RING_SIZE; + struct sk_buff *skb; + int sw_frame_id; + sw_frame_id = (le32_to_cpu( + np->tx_ring[entry].status) >> 2) & 0xff; + if (sw_frame_id == hw_frame_id && + !(le32_to_cpu(np->tx_ring[entry].status) + & 0x00010000)) + break; + if (sw_frame_id == (hw_frame_id + 1) % + TX_RING_SIZE) + break; + skb = np->tx_skbuff[entry]; + /* Free the original skb. */ + dma_unmap_single(&np->pci_dev->dev, + le32_to_cpu(np->tx_ring[entry].frag[0].addr), + skb->len, DMA_TO_DEVICE); + dev_kfree_skb_irq (np->tx_skbuff[entry]); + np->tx_skbuff[entry] = NULL; + np->tx_ring[entry].frag[0].addr = 0; + np->tx_ring[entry].frag[0].length = 0; + } + spin_unlock(&np->lock); + } else { + spin_lock(&np->lock); + for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) { + int entry = np->dirty_tx % TX_RING_SIZE; + struct sk_buff *skb; + if (!(le32_to_cpu(np->tx_ring[entry].status) + & 0x00010000)) + break; + skb = np->tx_skbuff[entry]; + /* Free the original skb. */ + dma_unmap_single(&np->pci_dev->dev, + le32_to_cpu(np->tx_ring[entry].frag[0].addr), + skb->len, DMA_TO_DEVICE); + dev_kfree_skb_irq (np->tx_skbuff[entry]); + np->tx_skbuff[entry] = NULL; + np->tx_ring[entry].frag[0].addr = 0; + np->tx_ring[entry].frag[0].length = 0; + } + spin_unlock(&np->lock); + } + + if (netif_queue_stopped(dev) && + np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) { + /* The ring is no longer full, clear busy flag. */ + netif_wake_queue (dev); + } + /* Abnormal error summary/uncommon events handlers. */ + if (intr_status & (IntrPCIErr | LinkChange | StatsMax)) + netdev_error(dev, intr_status); + } while (0); + if (netif_msg_intr(np)) + printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n", + dev->name, ioread16(ioaddr + IntrStatus)); + return IRQ_RETVAL(handled); +} + +static void rx_poll(unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct netdev_private *np = netdev_priv(dev); + int entry = np->cur_rx % RX_RING_SIZE; + int boguscnt = np->budget; + void __iomem *ioaddr = np->base; + int received = 0; + + /* If EOP is set on the next entry, it's a new packet. Send it up. */ + while (1) { + struct netdev_desc *desc = &(np->rx_ring[entry]); + u32 frame_status = le32_to_cpu(desc->status); + int pkt_len; + + if (--boguscnt < 0) { + goto not_done; + } + if (!(frame_status & DescOwn)) + break; + pkt_len = frame_status & 0x1fff; /* Chip omits the CRC. */ + if (netif_msg_rx_status(np)) + printk(KERN_DEBUG " netdev_rx() status was %8.8x.\n", + frame_status); + if (frame_status & 0x001f4000) { + /* There was a error. */ + if (netif_msg_rx_err(np)) + printk(KERN_DEBUG " netdev_rx() Rx error was %8.8x.\n", + frame_status); + dev->stats.rx_errors++; + if (frame_status & 0x00100000) + dev->stats.rx_length_errors++; + if (frame_status & 0x00010000) + dev->stats.rx_fifo_errors++; + if (frame_status & 0x00060000) + dev->stats.rx_frame_errors++; + if (frame_status & 0x00080000) + dev->stats.rx_crc_errors++; + if (frame_status & 0x00100000) { + printk(KERN_WARNING "%s: Oversized Ethernet frame," + " status %8.8x.\n", + dev->name, frame_status); + } + } else { + struct sk_buff *skb; +#ifndef final_version + if (netif_msg_rx_status(np)) + printk(KERN_DEBUG " netdev_rx() normal Rx pkt length %d" + ", bogus_cnt %d.\n", + pkt_len, boguscnt); +#endif + /* Check if the packet is long enough to accept without copying + to a minimally-sized skbuff. */ + if (pkt_len < rx_copybreak && + (skb = dev_alloc_skb(pkt_len + 2)) != NULL) { + skb_reserve(skb, 2); /* 16 byte align the IP header */ + dma_sync_single_for_cpu(&np->pci_dev->dev, + le32_to_cpu(desc->frag[0].addr), + np->rx_buf_sz, DMA_FROM_DEVICE); + skb_copy_to_linear_data(skb, np->rx_skbuff[entry]->data, pkt_len); + dma_sync_single_for_device(&np->pci_dev->dev, + le32_to_cpu(desc->frag[0].addr), + np->rx_buf_sz, DMA_FROM_DEVICE); + skb_put(skb, pkt_len); + } else { + dma_unmap_single(&np->pci_dev->dev, + le32_to_cpu(desc->frag[0].addr), + np->rx_buf_sz, DMA_FROM_DEVICE); + skb_put(skb = np->rx_skbuff[entry], pkt_len); + np->rx_skbuff[entry] = NULL; + } + skb->protocol = eth_type_trans(skb, dev); + /* Note: checksum -> skb->ip_summed = CHECKSUM_UNNECESSARY; */ + netif_rx(skb); + } + entry = (entry + 1) % RX_RING_SIZE; + received++; + } + np->cur_rx = entry; + refill_rx (dev); + np->budget -= received; + iowrite16(DEFAULT_INTR, ioaddr + IntrEnable); + return; + +not_done: + np->cur_rx = entry; + refill_rx (dev); + if (!received) + received = 1; + np->budget -= received; + if (np->budget <= 0) + np->budget = RX_BUDGET; + tasklet_schedule(&np->rx_tasklet); +} + +static void refill_rx (struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + int entry; + int cnt = 0; + + /* Refill the Rx ring buffers. */ + for (;(np->cur_rx - np->dirty_rx + RX_RING_SIZE) % RX_RING_SIZE > 0; + np->dirty_rx = (np->dirty_rx + 1) % RX_RING_SIZE) { + struct sk_buff *skb; + entry = np->dirty_rx % RX_RING_SIZE; + if (np->rx_skbuff[entry] == NULL) { + skb = dev_alloc_skb(np->rx_buf_sz + 2); + np->rx_skbuff[entry] = skb; + if (skb == NULL) + break; /* Better luck next round. */ + skb->dev = dev; /* Mark as being used by this device. */ + skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ + np->rx_ring[entry].frag[0].addr = cpu_to_le32( + dma_map_single(&np->pci_dev->dev, skb->data, + np->rx_buf_sz, DMA_FROM_DEVICE)); + if (dma_mapping_error(&np->pci_dev->dev, + np->rx_ring[entry].frag[0].addr)) { + dev_kfree_skb_irq(skb); + np->rx_skbuff[entry] = NULL; + break; + } + } + /* Perhaps we need not reset this field. */ + np->rx_ring[entry].frag[0].length = + cpu_to_le32(np->rx_buf_sz | LastFrag); + np->rx_ring[entry].status = 0; + cnt++; + } +} +static void netdev_error(struct net_device *dev, int intr_status) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + u16 mii_ctl, mii_advertise, mii_lpa; + int speed; + + if (intr_status & LinkChange) { + if (mdio_wait_link(dev, 10) == 0) { + printk(KERN_INFO "%s: Link up\n", dev->name); + if (np->an_enable) { + mii_advertise = mdio_read(dev, np->phys[0], + MII_ADVERTISE); + mii_lpa = mdio_read(dev, np->phys[0], MII_LPA); + mii_advertise &= mii_lpa; + printk(KERN_INFO "%s: Link changed: ", + dev->name); + if (mii_advertise & ADVERTISE_100FULL) { + np->speed = 100; + printk("100Mbps, full duplex\n"); + } else if (mii_advertise & ADVERTISE_100HALF) { + np->speed = 100; + printk("100Mbps, half duplex\n"); + } else if (mii_advertise & ADVERTISE_10FULL) { + np->speed = 10; + printk("10Mbps, full duplex\n"); + } else if (mii_advertise & ADVERTISE_10HALF) { + np->speed = 10; + printk("10Mbps, half duplex\n"); + } else + printk("\n"); + + } else { + mii_ctl = mdio_read(dev, np->phys[0], MII_BMCR); + speed = (mii_ctl & BMCR_SPEED100) ? 100 : 10; + np->speed = speed; + printk(KERN_INFO "%s: Link changed: %dMbps ,", + dev->name, speed); + printk("%s duplex.\n", + (mii_ctl & BMCR_FULLDPLX) ? + "full" : "half"); + } + check_duplex(dev); + if (np->flowctrl && np->mii_if.full_duplex) { + iowrite16(ioread16(ioaddr + MulticastFilter1+2) | 0x0200, + ioaddr + MulticastFilter1+2); + iowrite16(ioread16(ioaddr + MACCtrl0) | EnbFlowCtrl, + ioaddr + MACCtrl0); + } + netif_carrier_on(dev); + } else { + printk(KERN_INFO "%s: Link down\n", dev->name); + netif_carrier_off(dev); + } + } + if (intr_status & StatsMax) { + get_stats(dev); + } + if (intr_status & IntrPCIErr) { + printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n", + dev->name, intr_status); + /* We must do a global reset of DMA to continue. */ + } +} + +static struct net_device_stats *get_stats(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + unsigned long flags; + u8 late_coll, single_coll, mult_coll; + + spin_lock_irqsave(&np->statlock, flags); + /* The chip only need report frame silently dropped. */ + dev->stats.rx_missed_errors += ioread8(ioaddr + RxMissed); + dev->stats.tx_packets += ioread16(ioaddr + TxFramesOK); + dev->stats.rx_packets += ioread16(ioaddr + RxFramesOK); + dev->stats.tx_carrier_errors += ioread8(ioaddr + StatsCarrierError); + + mult_coll = ioread8(ioaddr + StatsMultiColl); + np->xstats.tx_multiple_collisions += mult_coll; + single_coll = ioread8(ioaddr + StatsOneColl); + np->xstats.tx_single_collisions += single_coll; + late_coll = ioread8(ioaddr + StatsLateColl); + np->xstats.tx_late_collisions += late_coll; + dev->stats.collisions += mult_coll + + single_coll + + late_coll; + + np->xstats.tx_deferred += ioread8(ioaddr + StatsTxDefer); + np->xstats.tx_deferred_excessive += ioread8(ioaddr + StatsTxXSDefer); + np->xstats.tx_aborted += ioread8(ioaddr + StatsTxAbort); + np->xstats.tx_bcasts += ioread8(ioaddr + StatsBcastTx); + np->xstats.rx_bcasts += ioread8(ioaddr + StatsBcastRx); + np->xstats.tx_mcasts += ioread8(ioaddr + StatsMcastTx); + np->xstats.rx_mcasts += ioread8(ioaddr + StatsMcastRx); + + dev->stats.tx_bytes += ioread16(ioaddr + TxOctetsLow); + dev->stats.tx_bytes += ioread16(ioaddr + TxOctetsHigh) << 16; + dev->stats.rx_bytes += ioread16(ioaddr + RxOctetsLow); + dev->stats.rx_bytes += ioread16(ioaddr + RxOctetsHigh) << 16; + + spin_unlock_irqrestore(&np->statlock, flags); + + return &dev->stats; +} + +static void set_rx_mode(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + u16 mc_filter[4]; /* Multicast hash filter */ + u32 rx_mode; + int i; + + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + memset(mc_filter, 0xff, sizeof(mc_filter)); + rx_mode = AcceptBroadcast | AcceptMulticast | AcceptAll | AcceptMyPhys; + } else if ((netdev_mc_count(dev) > multicast_filter_limit) || + (dev->flags & IFF_ALLMULTI)) { + /* Too many to match, or accept all multicasts. */ + memset(mc_filter, 0xff, sizeof(mc_filter)); + rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys; + } else if (!netdev_mc_empty(dev)) { + struct netdev_hw_addr *ha; + int bit; + int index; + int crc; + memset (mc_filter, 0, sizeof (mc_filter)); + netdev_for_each_mc_addr(ha, dev) { + crc = ether_crc_le(ETH_ALEN, ha->addr); + for (index=0, bit=0; bit < 6; bit++, crc <<= 1) + if (crc & 0x80000000) index |= 1 << bit; + mc_filter[index/16] |= (1 << (index % 16)); + } + rx_mode = AcceptBroadcast | AcceptMultiHash | AcceptMyPhys; + } else { + iowrite8(AcceptBroadcast | AcceptMyPhys, ioaddr + RxMode); + return; + } + if (np->mii_if.full_duplex && np->flowctrl) + mc_filter[3] |= 0x0200; + + for (i = 0; i < 4; i++) + iowrite16(mc_filter[i], ioaddr + MulticastFilter0 + i*2); + iowrite8(rx_mode, ioaddr + RxMode); +} + +static int __set_mac_addr(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + u16 addr16; + + addr16 = (dev->dev_addr[0] | (dev->dev_addr[1] << 8)); + iowrite16(addr16, np->base + StationAddr); + addr16 = (dev->dev_addr[2] | (dev->dev_addr[3] << 8)); + iowrite16(addr16, np->base + StationAddr+2); + addr16 = (dev->dev_addr[4] | (dev->dev_addr[5] << 8)); + iowrite16(addr16, np->base + StationAddr+4); + return 0; +} + +/* Invoked with rtnl_lock held */ +static int sundance_set_mac_addr(struct net_device *dev, void *data) +{ + const struct sockaddr *addr = data; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EINVAL; + memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); + __set_mac_addr(dev); + + return 0; +} + +static const struct { + const char name[ETH_GSTRING_LEN]; +} sundance_stats[] = { + { "tx_multiple_collisions" }, + { "tx_single_collisions" }, + { "tx_late_collisions" }, + { "tx_deferred" }, + { "tx_deferred_excessive" }, + { "tx_aborted" }, + { "tx_bcasts" }, + { "rx_bcasts" }, + { "tx_mcasts" }, + { "rx_mcasts" }, +}; + +static int check_if_running(struct net_device *dev) +{ + if (!netif_running(dev)) + return -EINVAL; + return 0; +} + +static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct netdev_private *np = netdev_priv(dev); + strcpy(info->driver, DRV_NAME); + strcpy(info->version, DRV_VERSION); + strcpy(info->bus_info, pci_name(np->pci_dev)); +} + +static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) +{ + struct netdev_private *np = netdev_priv(dev); + spin_lock_irq(&np->lock); + mii_ethtool_gset(&np->mii_if, 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 = mii_ethtool_sset(&np->mii_if, ecmd); + spin_unlock_irq(&np->lock); + return res; +} + +static int nway_reset(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + return mii_nway_restart(&np->mii_if); +} + +static u32 get_link(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + return mii_link_ok(&np->mii_if); +} + +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 void get_strings(struct net_device *dev, u32 stringset, + u8 *data) +{ + if (stringset == ETH_SS_STATS) + memcpy(data, sundance_stats, sizeof(sundance_stats)); +} + +static int get_sset_count(struct net_device *dev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return ARRAY_SIZE(sundance_stats); + default: + return -EOPNOTSUPP; + } +} + +static void get_ethtool_stats(struct net_device *dev, + struct ethtool_stats *stats, u64 *data) +{ + struct netdev_private *np = netdev_priv(dev); + int i = 0; + + get_stats(dev); + data[i++] = np->xstats.tx_multiple_collisions; + data[i++] = np->xstats.tx_single_collisions; + data[i++] = np->xstats.tx_late_collisions; + data[i++] = np->xstats.tx_deferred; + data[i++] = np->xstats.tx_deferred_excessive; + data[i++] = np->xstats.tx_aborted; + data[i++] = np->xstats.tx_bcasts; + data[i++] = np->xstats.rx_bcasts; + data[i++] = np->xstats.tx_mcasts; + data[i++] = np->xstats.rx_mcasts; +} + +static const struct ethtool_ops ethtool_ops = { + .begin = check_if_running, + .get_drvinfo = get_drvinfo, + .get_settings = get_settings, + .set_settings = set_settings, + .nway_reset = nway_reset, + .get_link = get_link, + .get_msglevel = get_msglevel, + .set_msglevel = set_msglevel, + .get_strings = get_strings, + .get_sset_count = get_sset_count, + .get_ethtool_stats = get_ethtool_stats, +}; + +static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct netdev_private *np = netdev_priv(dev); + int rc; + + if (!netif_running(dev)) + return -EINVAL; + + spin_lock_irq(&np->lock); + rc = generic_mii_ioctl(&np->mii_if, if_mii(rq), cmd, NULL); + spin_unlock_irq(&np->lock); + + return rc; +} + +static int netdev_close(struct net_device *dev) +{ + struct netdev_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + struct sk_buff *skb; + int i; + + /* Wait and kill tasklet */ + tasklet_kill(&np->rx_tasklet); + tasklet_kill(&np->tx_tasklet); + np->cur_tx = 0; + np->dirty_tx = 0; + np->cur_task = 0; + np->last_tx = NULL; + + netif_stop_queue(dev); + + if (netif_msg_ifdown(np)) { + printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %2.2x " + "Rx %4.4x Int %2.2x.\n", + dev->name, ioread8(ioaddr + TxStatus), + ioread32(ioaddr + RxStatus), ioread16(ioaddr + IntrStatus)); + 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); + } + + /* Disable interrupts by clearing the interrupt mask. */ + iowrite16(0x0000, ioaddr + IntrEnable); + + /* Disable Rx and Tx DMA for safely release resource */ + iowrite32(0x500, ioaddr + DMACtrl); + + /* Stop the chip's Tx and Rx processes. */ + iowrite16(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1); + + for (i = 2000; i > 0; i--) { + if ((ioread32(ioaddr + DMACtrl) & 0xc000) == 0) + break; + mdelay(1); + } + + iowrite16(GlobalReset | DMAReset | FIFOReset | NetworkReset, + ioaddr + ASIC_HI_WORD(ASICCtrl)); + + for (i = 2000; i > 0; i--) { + if ((ioread16(ioaddr + ASIC_HI_WORD(ASICCtrl)) & ResetBusy) == 0) + break; + mdelay(1); + } + +#ifdef __i386__ + if (netif_msg_hw(np)) { + printk(KERN_DEBUG " Tx ring at %8.8x:\n", + (int)(np->tx_ring_dma)); + for (i = 0; i < TX_RING_SIZE; i++) + printk(KERN_DEBUG " #%d desc. %4.4x %8.8x %8.8x.\n", + i, np->tx_ring[i].status, np->tx_ring[i].frag[0].addr, + np->tx_ring[i].frag[0].length); + printk(KERN_DEBUG " Rx ring %8.8x:\n", + (int)(np->rx_ring_dma)); + for (i = 0; i < /*RX_RING_SIZE*/4 ; i++) { + printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8x\n", + i, np->rx_ring[i].status, np->rx_ring[i].frag[0].addr, + np->rx_ring[i].frag[0].length); + } + } +#endif /* __i386__ debugging only */ + + free_irq(dev->irq, dev); + + del_timer_sync(&np->timer); + + /* Free all the skbuffs in the Rx queue. */ + for (i = 0; i < RX_RING_SIZE; i++) { + np->rx_ring[i].status = 0; + skb = np->rx_skbuff[i]; + if (skb) { + dma_unmap_single(&np->pci_dev->dev, + le32_to_cpu(np->rx_ring[i].frag[0].addr), + np->rx_buf_sz, DMA_FROM_DEVICE); + dev_kfree_skb(skb); + np->rx_skbuff[i] = NULL; + } + np->rx_ring[i].frag[0].addr = cpu_to_le32(0xBADF00D0); /* poison */ + } + for (i = 0; i < TX_RING_SIZE; i++) { + np->tx_ring[i].next_desc = 0; + skb = np->tx_skbuff[i]; + if (skb) { + dma_unmap_single(&np->pci_dev->dev, + le32_to_cpu(np->tx_ring[i].frag[0].addr), + skb->len, DMA_TO_DEVICE); + dev_kfree_skb(skb); + np->tx_skbuff[i] = NULL; + } + } + + return 0; +} + +static void __devexit sundance_remove1 (struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + + if (dev) { + struct netdev_private *np = netdev_priv(dev); + unregister_netdev(dev); + dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, + np->rx_ring, np->rx_ring_dma); + dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, + np->tx_ring, np->tx_ring_dma); + pci_iounmap(pdev, np->base); + pci_release_regions(pdev); + free_netdev(dev); + pci_set_drvdata(pdev, NULL); + } +} + +#ifdef CONFIG_PM + +static int sundance_suspend(struct pci_dev *pci_dev, pm_message_t state) +{ + struct net_device *dev = pci_get_drvdata(pci_dev); + + if (!netif_running(dev)) + return 0; + + netdev_close(dev); + netif_device_detach(dev); + + pci_save_state(pci_dev); + pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state)); + + return 0; +} + +static int sundance_resume(struct pci_dev *pci_dev) +{ + struct net_device *dev = pci_get_drvdata(pci_dev); + int err = 0; + + if (!netif_running(dev)) + return 0; + + pci_set_power_state(pci_dev, PCI_D0); + pci_restore_state(pci_dev); + + err = netdev_open(dev); + if (err) { + printk(KERN_ERR "%s: Can't resume interface!\n", + dev->name); + goto out; + } + + netif_device_attach(dev); + +out: + return err; +} + +#endif /* CONFIG_PM */ + +static struct pci_driver sundance_driver = { + .name = DRV_NAME, + .id_table = sundance_pci_tbl, + .probe = sundance_probe1, + .remove = __devexit_p(sundance_remove1), +#ifdef CONFIG_PM + .suspend = sundance_suspend, + .resume = sundance_resume, +#endif /* CONFIG_PM */ +}; + +static int __init sundance_init(void) +{ +/* when a module, this is printed whether or not devices are found in probe */ +#ifdef MODULE + printk(version); +#endif + return pci_register_driver(&sundance_driver); +} + +static void __exit sundance_exit(void) +{ + pci_unregister_driver(&sundance_driver); +} + +module_init(sundance_init); +module_exit(sundance_exit); + + |