diff options
Diffstat (limited to 'kernel/drivers/net/ethernet/smsc/epic100.c')
| -rw-r--r-- | kernel/drivers/net/ethernet/smsc/epic100.c | 1596 |
1 files changed, 1596 insertions, 0 deletions
diff --git a/kernel/drivers/net/ethernet/smsc/epic100.c b/kernel/drivers/net/ethernet/smsc/epic100.c new file mode 100644 index 000000000..443f1da9f --- /dev/null +++ b/kernel/drivers/net/ethernet/smsc/epic100.c @@ -0,0 +1,1596 @@ +/* epic100.c: A SMC 83c170 EPIC/100 Fast Ethernet driver for Linux. */ +/* + Written/copyright 1997-2001 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. + + This driver is for the SMC83c170/175 "EPIC" series, as used on the + SMC EtherPower II 9432 PCI adapter, and several CardBus cards. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + Information and updates available at + http://www.scyld.com/network/epic100.html + [this link no longer provides anything useful -jgarzik] + + --------------------------------------------------------------------- + +*/ + +#define DRV_NAME "epic100" +#define DRV_VERSION "2.1" +#define DRV_RELDATE "Sept 11, 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. */ + +/* Used to pass the full-duplex flag, etc. */ +#define MAX_UNITS 8 /* More are supported, limit only on options */ +static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; +static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; + +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1518 effectively disables this feature. */ +static int rx_copybreak; + +/* Operational parameters that are set at compile time. */ + +/* Keep the ring sizes a power of two for operational 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 256 +#define TX_QUEUE_LEN 240 /* Limit ring entries actually used. */ +#define RX_RING_SIZE 256 +#define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct epic_tx_desc) +#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct epic_rx_desc) + +/* Operational parameters that usually are not changed. */ +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (2*HZ) + +#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ + +/* Bytes transferred to chip before transmission starts. */ +/* Initial threshold, increased on underflow, rounded down to 4 byte units. */ +#define TX_FIFO_THRESH 256 +#define RX_FIFO_THRESH 1 /* 0-3, 0==32, 64,96, or 3==128 bytes */ + +#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/delay.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/mii.h> +#include <linux/crc32.h> +#include <linux/bitops.h> +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/byteorder.h> + +/* These identify the driver base version and may not be removed. */ +static char version[] = +DRV_NAME ".c:v1.11 1/7/2001 Written by Donald Becker <becker@scyld.com>"; +static char version2[] = +" (unofficial 2.4.x kernel port, version " DRV_VERSION ", " DRV_RELDATE ")"; + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("SMC 83c170 EPIC series Ethernet driver"); +MODULE_LICENSE("GPL"); + +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(debug, "EPIC/100 debug level (0-5)"); +MODULE_PARM_DESC(options, "EPIC/100: Bits 0-3: media type, bit 4: full duplex"); +MODULE_PARM_DESC(rx_copybreak, "EPIC/100 copy breakpoint for copy-only-tiny-frames"); +MODULE_PARM_DESC(full_duplex, "EPIC/100 full duplex setting(s) (1)"); + +/* + Theory of Operation + +I. Board Compatibility + +This device driver is designed for the SMC "EPIC/100", the SMC +single-chip Ethernet controllers for PCI. This chip is used on +the SMC EtherPower II boards. + +II. Board-specific settings + +PCI bus devices are configured by the system at boot time, so no jumpers +need to be set on the board. The system BIOS will assign the +PCI INTA signal to a (preferably otherwise unused) system IRQ line. +Note: Kernel versions earlier than 1.3.73 do not support shared PCI +interrupt lines. + +III. Driver operation + +IIIa. Ring buffers + +IVb. References + +http://www.smsc.com/media/Downloads_Public/discontinued/83c171.pdf +http://www.smsc.com/media/Downloads_Public/discontinued/83c175.pdf +http://scyld.com/expert/NWay.html +http://www.national.com/pf/DP/DP83840A.html + +IVc. Errata + +*/ + + +enum chip_capability_flags { MII_PWRDWN=1, TYPE2_INTR=2, NO_MII=4 }; + +#define EPIC_TOTAL_SIZE 0x100 +#define USE_IO_OPS 1 + +#ifdef USE_IO_OPS +#define EPIC_BAR 0 +#else +#define EPIC_BAR 1 +#endif + +typedef enum { + SMSC_83C170_0, + SMSC_83C170, + SMSC_83C175, +} chip_t; + + +struct epic_chip_info { + const char *name; + int drv_flags; /* Driver use, intended as capability flags. */ +}; + + +/* indexed by chip_t */ +static const struct epic_chip_info pci_id_tbl[] = { + { "SMSC EPIC/100 83c170", TYPE2_INTR | NO_MII | MII_PWRDWN }, + { "SMSC EPIC/100 83c170", TYPE2_INTR }, + { "SMSC EPIC/C 83c175", TYPE2_INTR | MII_PWRDWN }, +}; + + +static const struct pci_device_id epic_pci_tbl[] = { + { 0x10B8, 0x0005, 0x1092, 0x0AB4, 0, 0, SMSC_83C170_0 }, + { 0x10B8, 0x0005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SMSC_83C170 }, + { 0x10B8, 0x0006, PCI_ANY_ID, PCI_ANY_ID, + PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, SMSC_83C175 }, + { 0,} +}; +MODULE_DEVICE_TABLE (pci, epic_pci_tbl); + +#define ew16(reg, val) iowrite16(val, ioaddr + (reg)) +#define ew32(reg, val) iowrite32(val, ioaddr + (reg)) +#define er8(reg) ioread8(ioaddr + (reg)) +#define er16(reg) ioread16(ioaddr + (reg)) +#define er32(reg) ioread32(ioaddr + (reg)) + +/* Offsets to registers, using the (ugh) SMC names. */ +enum epic_registers { + COMMAND=0, INTSTAT=4, INTMASK=8, GENCTL=0x0C, NVCTL=0x10, EECTL=0x14, + PCIBurstCnt=0x18, + TEST1=0x1C, CRCCNT=0x20, ALICNT=0x24, MPCNT=0x28, /* Rx error counters. */ + MIICtrl=0x30, MIIData=0x34, MIICfg=0x38, + LAN0=64, /* MAC address. */ + MC0=80, /* Multicast filter table. */ + RxCtrl=96, TxCtrl=112, TxSTAT=0x74, + PRxCDAR=0x84, RxSTAT=0xA4, EarlyRx=0xB0, PTxCDAR=0xC4, TxThresh=0xDC, +}; + +/* Interrupt register bits, using my own meaningful names. */ +enum IntrStatus { + TxIdle=0x40000, RxIdle=0x20000, IntrSummary=0x010000, + PCIBusErr170=0x7000, PCIBusErr175=0x1000, PhyEvent175=0x8000, + RxStarted=0x0800, RxEarlyWarn=0x0400, CntFull=0x0200, TxUnderrun=0x0100, + TxEmpty=0x0080, TxDone=0x0020, RxError=0x0010, + RxOverflow=0x0008, RxFull=0x0004, RxHeader=0x0002, RxDone=0x0001, +}; +enum CommandBits { + StopRx=1, StartRx=2, TxQueued=4, RxQueued=8, + StopTxDMA=0x20, StopRxDMA=0x40, RestartTx=0x80, +}; + +#define EpicRemoved 0xffffffff /* Chip failed or removed (CardBus) */ + +#define EpicNapiEvent (TxEmpty | TxDone | \ + RxDone | RxStarted | RxEarlyWarn | RxOverflow | RxFull) +#define EpicNormalEvent (0x0000ffff & ~EpicNapiEvent) + +static const u16 media2miictl[16] = { + 0, 0x0C00, 0x0C00, 0x2000, 0x0100, 0x2100, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0 }; + +/* + * The EPIC100 Rx and Tx buffer descriptors. Note that these + * really ARE host-endian; it's not a misannotation. We tell + * the card to byteswap them internally on big-endian hosts - + * look for #ifdef __BIG_ENDIAN in epic_open(). + */ + +struct epic_tx_desc { + u32 txstatus; + u32 bufaddr; + u32 buflength; + u32 next; +}; + +struct epic_rx_desc { + u32 rxstatus; + u32 bufaddr; + u32 buflength; + u32 next; +}; + +enum desc_status_bits { + DescOwn=0x8000, +}; + +#define PRIV_ALIGN 15 /* Required alignment mask */ +struct epic_private { + struct epic_rx_desc *rx_ring; + struct epic_tx_desc *tx_ring; + /* The saved address of a sent-in-place packet/buffer, for skfree(). */ + struct sk_buff* tx_skbuff[TX_RING_SIZE]; + /* The addresses of receive-in-place skbuffs. */ + struct sk_buff* rx_skbuff[RX_RING_SIZE]; + + dma_addr_t tx_ring_dma; + dma_addr_t rx_ring_dma; + + /* Ring pointers. */ + spinlock_t lock; /* Group with Tx control cache line. */ + spinlock_t napi_lock; + struct napi_struct napi; + unsigned int reschedule_in_poll; + unsigned int cur_tx, dirty_tx; + + unsigned int cur_rx, dirty_rx; + u32 irq_mask; + unsigned int rx_buf_sz; /* Based on MTU+slack. */ + + void __iomem *ioaddr; + struct pci_dev *pci_dev; /* PCI bus location. */ + int chip_id, chip_flags; + + struct timer_list timer; /* Media selection timer. */ + int tx_threshold; + unsigned char mc_filter[8]; + signed char phys[4]; /* MII device addresses. */ + u16 advertising; /* NWay media advertisement */ + int mii_phy_cnt; + struct mii_if_info mii; + unsigned int tx_full:1; /* The Tx queue is full. */ + unsigned int default_port:4; /* Last dev->if_port value. */ +}; + +static int epic_open(struct net_device *dev); +static int read_eeprom(struct epic_private *, int); +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 loc, int val); +static void epic_restart(struct net_device *dev); +static void epic_timer(unsigned long data); +static void epic_tx_timeout(struct net_device *dev); +static void epic_init_ring(struct net_device *dev); +static netdev_tx_t epic_start_xmit(struct sk_buff *skb, + struct net_device *dev); +static int epic_rx(struct net_device *dev, int budget); +static int epic_poll(struct napi_struct *napi, int budget); +static irqreturn_t epic_interrupt(int irq, void *dev_instance); +static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +static const struct ethtool_ops netdev_ethtool_ops; +static int epic_close(struct net_device *dev); +static struct net_device_stats *epic_get_stats(struct net_device *dev); +static void set_rx_mode(struct net_device *dev); + +static const struct net_device_ops epic_netdev_ops = { + .ndo_open = epic_open, + .ndo_stop = epic_close, + .ndo_start_xmit = epic_start_xmit, + .ndo_tx_timeout = epic_tx_timeout, + .ndo_get_stats = epic_get_stats, + .ndo_set_rx_mode = set_rx_mode, + .ndo_do_ioctl = netdev_ioctl, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int epic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + static int card_idx = -1; + void __iomem *ioaddr; + int chip_idx = (int) ent->driver_data; + int irq; + struct net_device *dev; + struct epic_private *ep; + int i, ret, option = 0, duplex = 0; + void *ring_space; + dma_addr_t ring_dma; + +/* when built into the kernel, we only print version if device is found */ +#ifndef MODULE + pr_info_once("%s%s\n", version, version2); +#endif + + card_idx++; + + ret = pci_enable_device(pdev); + if (ret) + goto out; + irq = pdev->irq; + + if (pci_resource_len(pdev, 0) < EPIC_TOTAL_SIZE) { + dev_err(&pdev->dev, "no PCI region space\n"); + ret = -ENODEV; + goto err_out_disable; + } + + pci_set_master(pdev); + + ret = pci_request_regions(pdev, DRV_NAME); + if (ret < 0) + goto err_out_disable; + + ret = -ENOMEM; + + dev = alloc_etherdev(sizeof (*ep)); + if (!dev) + goto err_out_free_res; + + SET_NETDEV_DEV(dev, &pdev->dev); + + ioaddr = pci_iomap(pdev, EPIC_BAR, 0); + if (!ioaddr) { + dev_err(&pdev->dev, "ioremap failed\n"); + goto err_out_free_netdev; + } + + pci_set_drvdata(pdev, dev); + ep = netdev_priv(dev); + ep->ioaddr = ioaddr; + ep->mii.dev = dev; + ep->mii.mdio_read = mdio_read; + ep->mii.mdio_write = mdio_write; + ep->mii.phy_id_mask = 0x1f; + ep->mii.reg_num_mask = 0x1f; + + ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma); + if (!ring_space) + goto err_out_iounmap; + ep->tx_ring = ring_space; + ep->tx_ring_dma = ring_dma; + + ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma); + if (!ring_space) + goto err_out_unmap_tx; + ep->rx_ring = ring_space; + ep->rx_ring_dma = ring_dma; + + if (dev->mem_start) { + option = dev->mem_start; + duplex = (dev->mem_start & 16) ? 1 : 0; + } else if (card_idx >= 0 && card_idx < MAX_UNITS) { + if (options[card_idx] >= 0) + option = options[card_idx]; + if (full_duplex[card_idx] >= 0) + duplex = full_duplex[card_idx]; + } + + spin_lock_init(&ep->lock); + spin_lock_init(&ep->napi_lock); + ep->reschedule_in_poll = 0; + + /* Bring the chip out of low-power mode. */ + ew32(GENCTL, 0x4200); + /* Magic?! If we don't set this bit the MII interface won't work. */ + /* This magic is documented in SMSC app note 7.15 */ + for (i = 16; i > 0; i--) + ew32(TEST1, 0x0008); + + /* Turn on the MII transceiver. */ + ew32(MIICfg, 0x12); + if (chip_idx == 1) + ew32(NVCTL, (er32(NVCTL) & ~0x003c) | 0x4800); + ew32(GENCTL, 0x0200); + + /* Note: the '175 does not have a serial EEPROM. */ + for (i = 0; i < 3; i++) + ((__le16 *)dev->dev_addr)[i] = cpu_to_le16(er16(LAN0 + i*4)); + + if (debug > 2) { + dev_dbg(&pdev->dev, "EEPROM contents:\n"); + for (i = 0; i < 64; i++) + pr_cont(" %4.4x%s", read_eeprom(ep, i), + i % 16 == 15 ? "\n" : ""); + } + + ep->pci_dev = pdev; + ep->chip_id = chip_idx; + ep->chip_flags = pci_id_tbl[chip_idx].drv_flags; + ep->irq_mask = + (ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170) + | CntFull | TxUnderrun | EpicNapiEvent; + + /* Find the connected MII xcvrs. + Doing this in open() would allow detecting external xcvrs later, but + takes much time and no cards have external MII. */ + { + int phy, phy_idx = 0; + for (phy = 1; phy < 32 && phy_idx < sizeof(ep->phys); phy++) { + int mii_status = mdio_read(dev, phy, MII_BMSR); + if (mii_status != 0xffff && mii_status != 0x0000) { + ep->phys[phy_idx++] = phy; + dev_info(&pdev->dev, + "MII transceiver #%d control " + "%4.4x status %4.4x.\n", + phy, mdio_read(dev, phy, 0), mii_status); + } + } + ep->mii_phy_cnt = phy_idx; + if (phy_idx != 0) { + phy = ep->phys[0]; + ep->mii.advertising = mdio_read(dev, phy, MII_ADVERTISE); + dev_info(&pdev->dev, + "Autonegotiation advertising %4.4x link " + "partner %4.4x.\n", + ep->mii.advertising, mdio_read(dev, phy, 5)); + } else if ( ! (ep->chip_flags & NO_MII)) { + dev_warn(&pdev->dev, + "***WARNING***: No MII transceiver found!\n"); + /* Use the known PHY address of the EPII. */ + ep->phys[0] = 3; + } + ep->mii.phy_id = ep->phys[0]; + } + + /* Turn off the MII xcvr (175 only!), leave the chip in low-power mode. */ + if (ep->chip_flags & MII_PWRDWN) + ew32(NVCTL, er32(NVCTL) & ~0x483c); + ew32(GENCTL, 0x0008); + + /* The lower four bits are the media type. */ + if (duplex) { + ep->mii.force_media = ep->mii.full_duplex = 1; + dev_info(&pdev->dev, "Forced full duplex requested.\n"); + } + dev->if_port = ep->default_port = option; + + /* The Epic-specific entries in the device structure. */ + dev->netdev_ops = &epic_netdev_ops; + dev->ethtool_ops = &netdev_ethtool_ops; + dev->watchdog_timeo = TX_TIMEOUT; + netif_napi_add(dev, &ep->napi, epic_poll, 64); + + ret = register_netdev(dev); + if (ret < 0) + goto err_out_unmap_rx; + + netdev_info(dev, "%s at %lx, IRQ %d, %pM\n", + pci_id_tbl[chip_idx].name, + (long)pci_resource_start(pdev, EPIC_BAR), pdev->irq, + dev->dev_addr); + +out: + return ret; + +err_out_unmap_rx: + pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma); +err_out_unmap_tx: + pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma); +err_out_iounmap: + pci_iounmap(pdev, ioaddr); +err_out_free_netdev: + free_netdev(dev); +err_out_free_res: + pci_release_regions(pdev); +err_out_disable: + pci_disable_device(pdev); + goto out; +} + +/* Serial EEPROM section. */ + +/* EEPROM_Ctrl bits. */ +#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */ +#define EE_CS 0x02 /* EEPROM chip select. */ +#define EE_DATA_WRITE 0x08 /* EEPROM chip data in. */ +#define EE_WRITE_0 0x01 +#define EE_WRITE_1 0x09 +#define EE_DATA_READ 0x10 /* EEPROM chip data out. */ +#define EE_ENB (0x0001 | EE_CS) + +/* Delay between EEPROM clock transitions. + This serves to flush the operation to the PCI bus. + */ + +#define eeprom_delay() er32(EECTL) + +/* The EEPROM commands include the alway-set leading bit. */ +#define EE_WRITE_CMD (5 << 6) +#define EE_READ64_CMD (6 << 6) +#define EE_READ256_CMD (6 << 8) +#define EE_ERASE_CMD (7 << 6) + +static void epic_disable_int(struct net_device *dev, struct epic_private *ep) +{ + void __iomem *ioaddr = ep->ioaddr; + + ew32(INTMASK, 0x00000000); +} + +static inline void __epic_pci_commit(void __iomem *ioaddr) +{ +#ifndef USE_IO_OPS + er32(INTMASK); +#endif +} + +static inline void epic_napi_irq_off(struct net_device *dev, + struct epic_private *ep) +{ + void __iomem *ioaddr = ep->ioaddr; + + ew32(INTMASK, ep->irq_mask & ~EpicNapiEvent); + __epic_pci_commit(ioaddr); +} + +static inline void epic_napi_irq_on(struct net_device *dev, + struct epic_private *ep) +{ + void __iomem *ioaddr = ep->ioaddr; + + /* No need to commit possible posted write */ + ew32(INTMASK, ep->irq_mask | EpicNapiEvent); +} + +static int read_eeprom(struct epic_private *ep, int location) +{ + void __iomem *ioaddr = ep->ioaddr; + int i; + int retval = 0; + int read_cmd = location | + (er32(EECTL) & 0x40 ? EE_READ64_CMD : EE_READ256_CMD); + + ew32(EECTL, EE_ENB & ~EE_CS); + ew32(EECTL, EE_ENB); + + /* Shift the read command bits out. */ + for (i = 12; i >= 0; i--) { + short dataval = (read_cmd & (1 << i)) ? EE_WRITE_1 : EE_WRITE_0; + ew32(EECTL, EE_ENB | dataval); + eeprom_delay(); + ew32(EECTL, EE_ENB | dataval | EE_SHIFT_CLK); + eeprom_delay(); + } + ew32(EECTL, EE_ENB); + + for (i = 16; i > 0; i--) { + ew32(EECTL, EE_ENB | EE_SHIFT_CLK); + eeprom_delay(); + retval = (retval << 1) | ((er32(EECTL) & EE_DATA_READ) ? 1 : 0); + ew32(EECTL, EE_ENB); + eeprom_delay(); + } + + /* Terminate the EEPROM access. */ + ew32(EECTL, EE_ENB & ~EE_CS); + return retval; +} + +#define MII_READOP 1 +#define MII_WRITEOP 2 +static int mdio_read(struct net_device *dev, int phy_id, int location) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + int read_cmd = (phy_id << 9) | (location << 4) | MII_READOP; + int i; + + ew32(MIICtrl, read_cmd); + /* Typical operation takes 25 loops. */ + for (i = 400; i > 0; i--) { + barrier(); + if ((er32(MIICtrl) & MII_READOP) == 0) { + /* Work around read failure bug. */ + if (phy_id == 1 && location < 6 && + er16(MIIData) == 0xffff) { + ew32(MIICtrl, read_cmd); + continue; + } + return er16(MIIData); + } + } + return 0xffff; +} + +static void mdio_write(struct net_device *dev, int phy_id, int loc, int value) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + int i; + + ew16(MIIData, value); + ew32(MIICtrl, (phy_id << 9) | (loc << 4) | MII_WRITEOP); + for (i = 10000; i > 0; i--) { + barrier(); + if ((er32(MIICtrl) & MII_WRITEOP) == 0) + break; + } +} + + +static int epic_open(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + const int irq = ep->pci_dev->irq; + int rc, i; + + /* Soft reset the chip. */ + ew32(GENCTL, 0x4001); + + napi_enable(&ep->napi); + rc = request_irq(irq, epic_interrupt, IRQF_SHARED, dev->name, dev); + if (rc) { + napi_disable(&ep->napi); + return rc; + } + + epic_init_ring(dev); + + ew32(GENCTL, 0x4000); + /* This magic is documented in SMSC app note 7.15 */ + for (i = 16; i > 0; i--) + ew32(TEST1, 0x0008); + + /* Pull the chip out of low-power mode, enable interrupts, and set for + PCI read multiple. The MIIcfg setting and strange write order are + required by the details of which bits are reset and the transceiver + wiring on the Ositech CardBus card. + */ +#if 0 + ew32(MIICfg, dev->if_port == 1 ? 0x13 : 0x12); +#endif + if (ep->chip_flags & MII_PWRDWN) + ew32(NVCTL, (er32(NVCTL) & ~0x003c) | 0x4800); + + /* Tell the chip to byteswap descriptors on big-endian hosts */ +#ifdef __BIG_ENDIAN + ew32(GENCTL, 0x4432 | (RX_FIFO_THRESH << 8)); + er32(GENCTL); + ew32(GENCTL, 0x0432 | (RX_FIFO_THRESH << 8)); +#else + ew32(GENCTL, 0x4412 | (RX_FIFO_THRESH << 8)); + er32(GENCTL); + ew32(GENCTL, 0x0412 | (RX_FIFO_THRESH << 8)); +#endif + + udelay(20); /* Looks like EPII needs that if you want reliable RX init. FIXME: pci posting bug? */ + + for (i = 0; i < 3; i++) + ew32(LAN0 + i*4, le16_to_cpu(((__le16*)dev->dev_addr)[i])); + + ep->tx_threshold = TX_FIFO_THRESH; + ew32(TxThresh, ep->tx_threshold); + + if (media2miictl[dev->if_port & 15]) { + if (ep->mii_phy_cnt) + mdio_write(dev, ep->phys[0], MII_BMCR, media2miictl[dev->if_port&15]); + if (dev->if_port == 1) { + if (debug > 1) + netdev_info(dev, "Using the 10base2 transceiver, MII status %4.4x.\n", + mdio_read(dev, ep->phys[0], MII_BMSR)); + } + } else { + int mii_lpa = mdio_read(dev, ep->phys[0], MII_LPA); + if (mii_lpa != 0xffff) { + if ((mii_lpa & LPA_100FULL) || (mii_lpa & 0x01C0) == LPA_10FULL) + ep->mii.full_duplex = 1; + else if (! (mii_lpa & LPA_LPACK)) + mdio_write(dev, ep->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART); + if (debug > 1) + netdev_info(dev, "Setting %s-duplex based on MII xcvr %d register read of %4.4x.\n", + ep->mii.full_duplex ? "full" + : "half", + ep->phys[0], mii_lpa); + } + } + + ew32(TxCtrl, ep->mii.full_duplex ? 0x7f : 0x79); + ew32(PRxCDAR, ep->rx_ring_dma); + ew32(PTxCDAR, ep->tx_ring_dma); + + /* Start the chip's Rx process. */ + set_rx_mode(dev); + ew32(COMMAND, StartRx | RxQueued); + + netif_start_queue(dev); + + /* Enable interrupts by setting the interrupt mask. */ + ew32(INTMASK, RxError | RxHeader | EpicNapiEvent | CntFull | + ((ep->chip_flags & TYPE2_INTR) ? PCIBusErr175 : PCIBusErr170) | + TxUnderrun); + + if (debug > 1) { + netdev_dbg(dev, "epic_open() ioaddr %p IRQ %d status %4.4x %s-duplex.\n", + ioaddr, irq, er32(GENCTL), + ep->mii.full_duplex ? "full" : "half"); + } + + /* Set the timer to switch to check for link beat and perhaps switch + to an alternate media type. */ + init_timer(&ep->timer); + ep->timer.expires = jiffies + 3*HZ; + ep->timer.data = (unsigned long)dev; + ep->timer.function = epic_timer; /* timer handler */ + add_timer(&ep->timer); + + return rc; +} + +/* Reset the chip to recover from a PCI transaction error. + This may occur at interrupt time. */ +static void epic_pause(struct net_device *dev) +{ + struct net_device_stats *stats = &dev->stats; + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + + netif_stop_queue (dev); + + /* Disable interrupts by clearing the interrupt mask. */ + ew32(INTMASK, 0x00000000); + /* Stop the chip's Tx and Rx DMA processes. */ + ew16(COMMAND, StopRx | StopTxDMA | StopRxDMA); + + /* Update the error counts. */ + if (er16(COMMAND) != 0xffff) { + stats->rx_missed_errors += er8(MPCNT); + stats->rx_frame_errors += er8(ALICNT); + stats->rx_crc_errors += er8(CRCCNT); + } + + /* Remove the packets on the Rx queue. */ + epic_rx(dev, RX_RING_SIZE); +} + +static void epic_restart(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + int i; + + /* Soft reset the chip. */ + ew32(GENCTL, 0x4001); + + netdev_dbg(dev, "Restarting the EPIC chip, Rx %d/%d Tx %d/%d.\n", + ep->cur_rx, ep->dirty_rx, ep->dirty_tx, ep->cur_tx); + udelay(1); + + /* This magic is documented in SMSC app note 7.15 */ + for (i = 16; i > 0; i--) + ew32(TEST1, 0x0008); + +#ifdef __BIG_ENDIAN + ew32(GENCTL, 0x0432 | (RX_FIFO_THRESH << 8)); +#else + ew32(GENCTL, 0x0412 | (RX_FIFO_THRESH << 8)); +#endif + ew32(MIICfg, dev->if_port == 1 ? 0x13 : 0x12); + if (ep->chip_flags & MII_PWRDWN) + ew32(NVCTL, (er32(NVCTL) & ~0x003c) | 0x4800); + + for (i = 0; i < 3; i++) + ew32(LAN0 + i*4, le16_to_cpu(((__le16*)dev->dev_addr)[i])); + + ep->tx_threshold = TX_FIFO_THRESH; + ew32(TxThresh, ep->tx_threshold); + ew32(TxCtrl, ep->mii.full_duplex ? 0x7f : 0x79); + ew32(PRxCDAR, ep->rx_ring_dma + + (ep->cur_rx % RX_RING_SIZE) * sizeof(struct epic_rx_desc)); + ew32(PTxCDAR, ep->tx_ring_dma + + (ep->dirty_tx % TX_RING_SIZE) * sizeof(struct epic_tx_desc)); + + /* Start the chip's Rx process. */ + set_rx_mode(dev); + ew32(COMMAND, StartRx | RxQueued); + + /* Enable interrupts by setting the interrupt mask. */ + ew32(INTMASK, RxError | RxHeader | EpicNapiEvent | CntFull | + ((ep->chip_flags & TYPE2_INTR) ? PCIBusErr175 : PCIBusErr170) | + TxUnderrun); + + netdev_dbg(dev, "epic_restart() done, cmd status %4.4x, ctl %4.4x interrupt %4.4x.\n", + er32(COMMAND), er32(GENCTL), er32(INTSTAT)); +} + +static void check_media(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + int mii_lpa = ep->mii_phy_cnt ? mdio_read(dev, ep->phys[0], MII_LPA) : 0; + int negotiated = mii_lpa & ep->mii.advertising; + int duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040; + + if (ep->mii.force_media) + return; + if (mii_lpa == 0xffff) /* Bogus read */ + return; + if (ep->mii.full_duplex != duplex) { + ep->mii.full_duplex = duplex; + netdev_info(dev, "Setting %s-duplex based on MII #%d link partner capability of %4.4x.\n", + ep->mii.full_duplex ? "full" : "half", + ep->phys[0], mii_lpa); + ew32(TxCtrl, ep->mii.full_duplex ? 0x7F : 0x79); + } +} + +static void epic_timer(unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + int next_tick = 5*HZ; + + if (debug > 3) { + netdev_dbg(dev, "Media monitor tick, Tx status %8.8x.\n", + er32(TxSTAT)); + netdev_dbg(dev, "Other registers are IntMask %4.4x IntStatus %4.4x RxStatus %4.4x.\n", + er32(INTMASK), er32(INTSTAT), er32(RxSTAT)); + } + + check_media(dev); + + ep->timer.expires = jiffies + next_tick; + add_timer(&ep->timer); +} + +static void epic_tx_timeout(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + + if (debug > 0) { + netdev_warn(dev, "Transmit timeout using MII device, Tx status %4.4x.\n", + er16(TxSTAT)); + if (debug > 1) { + netdev_dbg(dev, "Tx indices: dirty_tx %d, cur_tx %d.\n", + ep->dirty_tx, ep->cur_tx); + } + } + if (er16(TxSTAT) & 0x10) { /* Tx FIFO underflow. */ + dev->stats.tx_fifo_errors++; + ew32(COMMAND, RestartTx); + } else { + epic_restart(dev); + ew32(COMMAND, TxQueued); + } + + dev->trans_start = jiffies; /* prevent tx timeout */ + dev->stats.tx_errors++; + if (!ep->tx_full) + netif_wake_queue(dev); +} + +/* Initialize the Rx and Tx rings, along with various 'dev' bits. */ +static void epic_init_ring(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + int i; + + ep->tx_full = 0; + ep->dirty_tx = ep->cur_tx = 0; + ep->cur_rx = ep->dirty_rx = 0; + ep->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32); + + /* Initialize all Rx descriptors. */ + for (i = 0; i < RX_RING_SIZE; i++) { + ep->rx_ring[i].rxstatus = 0; + ep->rx_ring[i].buflength = ep->rx_buf_sz; + ep->rx_ring[i].next = ep->rx_ring_dma + + (i+1)*sizeof(struct epic_rx_desc); + ep->rx_skbuff[i] = NULL; + } + /* Mark the last entry as wrapping the ring. */ + ep->rx_ring[i-1].next = ep->rx_ring_dma; + + /* Fill in the Rx buffers. Handle allocation failure gracefully. */ + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb = netdev_alloc_skb(dev, ep->rx_buf_sz + 2); + ep->rx_skbuff[i] = skb; + if (skb == NULL) + break; + skb_reserve(skb, 2); /* 16 byte align the IP header. */ + ep->rx_ring[i].bufaddr = pci_map_single(ep->pci_dev, + skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE); + ep->rx_ring[i].rxstatus = DescOwn; + } + ep->dirty_rx = (unsigned int)(i - RX_RING_SIZE); + + /* The Tx buffer descriptor is filled in as needed, but we + do need to clear the ownership bit. */ + for (i = 0; i < TX_RING_SIZE; i++) { + ep->tx_skbuff[i] = NULL; + ep->tx_ring[i].txstatus = 0x0000; + ep->tx_ring[i].next = ep->tx_ring_dma + + (i+1)*sizeof(struct epic_tx_desc); + } + ep->tx_ring[i-1].next = ep->tx_ring_dma; +} + +static netdev_tx_t epic_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + int entry, free_count; + u32 ctrl_word; + unsigned long flags; + + if (skb_padto(skb, ETH_ZLEN)) + return NETDEV_TX_OK; + + /* Caution: the write order is important here, set the field with the + "ownership" bit last. */ + + /* Calculate the next Tx descriptor entry. */ + spin_lock_irqsave(&ep->lock, flags); + free_count = ep->cur_tx - ep->dirty_tx; + entry = ep->cur_tx % TX_RING_SIZE; + + ep->tx_skbuff[entry] = skb; + ep->tx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, skb->data, + skb->len, PCI_DMA_TODEVICE); + if (free_count < TX_QUEUE_LEN/2) {/* Typical path */ + ctrl_word = 0x100000; /* No interrupt */ + } else if (free_count == TX_QUEUE_LEN/2) { + ctrl_word = 0x140000; /* Tx-done intr. */ + } else if (free_count < TX_QUEUE_LEN - 1) { + ctrl_word = 0x100000; /* No Tx-done intr. */ + } else { + /* Leave room for an additional entry. */ + ctrl_word = 0x140000; /* Tx-done intr. */ + ep->tx_full = 1; + } + ep->tx_ring[entry].buflength = ctrl_word | skb->len; + ep->tx_ring[entry].txstatus = + ((skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN) << 16) + | DescOwn; + + ep->cur_tx++; + if (ep->tx_full) + netif_stop_queue(dev); + + spin_unlock_irqrestore(&ep->lock, flags); + /* Trigger an immediate transmit demand. */ + ew32(COMMAND, TxQueued); + + if (debug > 4) + netdev_dbg(dev, "Queued Tx packet size %d to slot %d, flag %2.2x Tx status %8.8x.\n", + skb->len, entry, ctrl_word, er32(TxSTAT)); + + return NETDEV_TX_OK; +} + +static void epic_tx_error(struct net_device *dev, struct epic_private *ep, + int status) +{ + struct net_device_stats *stats = &dev->stats; + +#ifndef final_version + /* There was an major error, log it. */ + if (debug > 1) + netdev_dbg(dev, "Transmit error, Tx status %8.8x.\n", + status); +#endif + stats->tx_errors++; + if (status & 0x1050) + stats->tx_aborted_errors++; + if (status & 0x0008) + stats->tx_carrier_errors++; + if (status & 0x0040) + stats->tx_window_errors++; + if (status & 0x0010) + stats->tx_fifo_errors++; +} + +static void epic_tx(struct net_device *dev, struct epic_private *ep) +{ + unsigned int dirty_tx, cur_tx; + + /* + * Note: if this lock becomes a problem we can narrow the locked + * region at the cost of occasionally grabbing the lock more times. + */ + cur_tx = ep->cur_tx; + for (dirty_tx = ep->dirty_tx; cur_tx - dirty_tx > 0; dirty_tx++) { + struct sk_buff *skb; + int entry = dirty_tx % TX_RING_SIZE; + int txstatus = ep->tx_ring[entry].txstatus; + + if (txstatus & DescOwn) + break; /* It still hasn't been Txed */ + + if (likely(txstatus & 0x0001)) { + dev->stats.collisions += (txstatus >> 8) & 15; + dev->stats.tx_packets++; + dev->stats.tx_bytes += ep->tx_skbuff[entry]->len; + } else + epic_tx_error(dev, ep, txstatus); + + /* Free the original skb. */ + skb = ep->tx_skbuff[entry]; + pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr, + skb->len, PCI_DMA_TODEVICE); + dev_kfree_skb_irq(skb); + ep->tx_skbuff[entry] = NULL; + } + +#ifndef final_version + if (cur_tx - dirty_tx > TX_RING_SIZE) { + netdev_warn(dev, "Out-of-sync dirty pointer, %d vs. %d, full=%d.\n", + dirty_tx, cur_tx, ep->tx_full); + dirty_tx += TX_RING_SIZE; + } +#endif + ep->dirty_tx = dirty_tx; + if (ep->tx_full && cur_tx - dirty_tx < TX_QUEUE_LEN - 4) { + /* The ring is no longer full, allow new TX entries. */ + ep->tx_full = 0; + netif_wake_queue(dev); + } +} + +/* The interrupt handler does all of the Rx thread work and cleans up + after the Tx thread. */ +static irqreturn_t epic_interrupt(int irq, void *dev_instance) +{ + struct net_device *dev = dev_instance; + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + unsigned int handled = 0; + int status; + + status = er32(INTSTAT); + /* Acknowledge all of the current interrupt sources ASAP. */ + ew32(INTSTAT, status & EpicNormalEvent); + + if (debug > 4) { + netdev_dbg(dev, "Interrupt, status=%#8.8x new intstat=%#8.8x.\n", + status, er32(INTSTAT)); + } + + if ((status & IntrSummary) == 0) + goto out; + + handled = 1; + + if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) { + spin_lock(&ep->napi_lock); + if (napi_schedule_prep(&ep->napi)) { + epic_napi_irq_off(dev, ep); + __napi_schedule(&ep->napi); + } else + ep->reschedule_in_poll++; + spin_unlock(&ep->napi_lock); + } + status &= ~EpicNapiEvent; + + /* Check uncommon events all at once. */ + if (status & (CntFull | TxUnderrun | PCIBusErr170 | PCIBusErr175)) { + struct net_device_stats *stats = &dev->stats; + + if (status == EpicRemoved) + goto out; + + /* Always update the error counts to avoid overhead later. */ + stats->rx_missed_errors += er8(MPCNT); + stats->rx_frame_errors += er8(ALICNT); + stats->rx_crc_errors += er8(CRCCNT); + + if (status & TxUnderrun) { /* Tx FIFO underflow. */ + stats->tx_fifo_errors++; + ew32(TxThresh, ep->tx_threshold += 128); + /* Restart the transmit process. */ + ew32(COMMAND, RestartTx); + } + if (status & PCIBusErr170) { + netdev_err(dev, "PCI Bus Error! status %4.4x.\n", + status); + epic_pause(dev); + epic_restart(dev); + } + /* Clear all error sources. */ + ew32(INTSTAT, status & 0x7f18); + } + +out: + if (debug > 3) { + netdev_dbg(dev, "exit interrupt, intr_status=%#4.4x.\n", + status); + } + + return IRQ_RETVAL(handled); +} + +static int epic_rx(struct net_device *dev, int budget) +{ + struct epic_private *ep = netdev_priv(dev); + int entry = ep->cur_rx % RX_RING_SIZE; + int rx_work_limit = ep->dirty_rx + RX_RING_SIZE - ep->cur_rx; + int work_done = 0; + + if (debug > 4) + netdev_dbg(dev, " In epic_rx(), entry %d %8.8x.\n", entry, + ep->rx_ring[entry].rxstatus); + + if (rx_work_limit > budget) + rx_work_limit = budget; + + /* If we own the next entry, it's a new packet. Send it up. */ + while ((ep->rx_ring[entry].rxstatus & DescOwn) == 0) { + int status = ep->rx_ring[entry].rxstatus; + + if (debug > 4) + netdev_dbg(dev, " epic_rx() status was %8.8x.\n", + status); + if (--rx_work_limit < 0) + break; + if (status & 0x2006) { + if (debug > 2) + netdev_dbg(dev, "epic_rx() error status was %8.8x.\n", + status); + if (status & 0x2000) { + netdev_warn(dev, "Oversized Ethernet frame spanned multiple buffers, status %4.4x!\n", + status); + dev->stats.rx_length_errors++; + } else if (status & 0x0006) + /* Rx Frame errors are counted in hardware. */ + dev->stats.rx_errors++; + } else { + /* Malloc up new buffer, compatible with net-2e. */ + /* Omit the four octet CRC from the length. */ + short pkt_len = (status >> 16) - 4; + struct sk_buff *skb; + + if (pkt_len > PKT_BUF_SZ - 4) { + netdev_err(dev, "Oversized Ethernet frame, status %x %d bytes.\n", + status, pkt_len); + pkt_len = 1514; + } + /* Check if the packet is long enough to accept without copying + to a minimally-sized skbuff. */ + if (pkt_len < rx_copybreak && + (skb = netdev_alloc_skb(dev, pkt_len + 2)) != NULL) { + skb_reserve(skb, 2); /* 16 byte align the IP header */ + pci_dma_sync_single_for_cpu(ep->pci_dev, + ep->rx_ring[entry].bufaddr, + ep->rx_buf_sz, + PCI_DMA_FROMDEVICE); + skb_copy_to_linear_data(skb, ep->rx_skbuff[entry]->data, pkt_len); + skb_put(skb, pkt_len); + pci_dma_sync_single_for_device(ep->pci_dev, + ep->rx_ring[entry].bufaddr, + ep->rx_buf_sz, + PCI_DMA_FROMDEVICE); + } else { + pci_unmap_single(ep->pci_dev, + ep->rx_ring[entry].bufaddr, + ep->rx_buf_sz, PCI_DMA_FROMDEVICE); + skb_put(skb = ep->rx_skbuff[entry], pkt_len); + ep->rx_skbuff[entry] = NULL; + } + skb->protocol = eth_type_trans(skb, dev); + netif_receive_skb(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += pkt_len; + } + work_done++; + entry = (++ep->cur_rx) % RX_RING_SIZE; + } + + /* Refill the Rx ring buffers. */ + for (; ep->cur_rx - ep->dirty_rx > 0; ep->dirty_rx++) { + entry = ep->dirty_rx % RX_RING_SIZE; + if (ep->rx_skbuff[entry] == NULL) { + struct sk_buff *skb; + skb = ep->rx_skbuff[entry] = netdev_alloc_skb(dev, ep->rx_buf_sz + 2); + if (skb == NULL) + break; + skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ + ep->rx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, + skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE); + work_done++; + } + /* AV: shouldn't we add a barrier here? */ + ep->rx_ring[entry].rxstatus = DescOwn; + } + return work_done; +} + +static void epic_rx_err(struct net_device *dev, struct epic_private *ep) +{ + void __iomem *ioaddr = ep->ioaddr; + int status; + + status = er32(INTSTAT); + + if (status == EpicRemoved) + return; + if (status & RxOverflow) /* Missed a Rx frame. */ + dev->stats.rx_errors++; + if (status & (RxOverflow | RxFull)) + ew16(COMMAND, RxQueued); +} + +static int epic_poll(struct napi_struct *napi, int budget) +{ + struct epic_private *ep = container_of(napi, struct epic_private, napi); + struct net_device *dev = ep->mii.dev; + int work_done = 0; + void __iomem *ioaddr = ep->ioaddr; + +rx_action: + + epic_tx(dev, ep); + + work_done += epic_rx(dev, budget); + + epic_rx_err(dev, ep); + + if (work_done < budget) { + unsigned long flags; + int more; + + /* A bit baroque but it avoids a (space hungry) spin_unlock */ + + spin_lock_irqsave(&ep->napi_lock, flags); + + more = ep->reschedule_in_poll; + if (!more) { + __napi_complete(napi); + ew32(INTSTAT, EpicNapiEvent); + epic_napi_irq_on(dev, ep); + } else + ep->reschedule_in_poll--; + + spin_unlock_irqrestore(&ep->napi_lock, flags); + + if (more) + goto rx_action; + } + + return work_done; +} + +static int epic_close(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + struct pci_dev *pdev = ep->pci_dev; + void __iomem *ioaddr = ep->ioaddr; + struct sk_buff *skb; + int i; + + netif_stop_queue(dev); + napi_disable(&ep->napi); + + if (debug > 1) + netdev_dbg(dev, "Shutting down ethercard, status was %2.2x.\n", + er32(INTSTAT)); + + del_timer_sync(&ep->timer); + + epic_disable_int(dev, ep); + + free_irq(pdev->irq, dev); + + epic_pause(dev); + + /* Free all the skbuffs in the Rx queue. */ + for (i = 0; i < RX_RING_SIZE; i++) { + skb = ep->rx_skbuff[i]; + ep->rx_skbuff[i] = NULL; + ep->rx_ring[i].rxstatus = 0; /* Not owned by Epic chip. */ + ep->rx_ring[i].buflength = 0; + if (skb) { + pci_unmap_single(pdev, ep->rx_ring[i].bufaddr, + ep->rx_buf_sz, PCI_DMA_FROMDEVICE); + dev_kfree_skb(skb); + } + ep->rx_ring[i].bufaddr = 0xBADF00D0; /* An invalid address. */ + } + for (i = 0; i < TX_RING_SIZE; i++) { + skb = ep->tx_skbuff[i]; + ep->tx_skbuff[i] = NULL; + if (!skb) + continue; + pci_unmap_single(pdev, ep->tx_ring[i].bufaddr, skb->len, + PCI_DMA_TODEVICE); + dev_kfree_skb(skb); + } + + /* Green! Leave the chip in low-power mode. */ + ew32(GENCTL, 0x0008); + + return 0; +} + +static struct net_device_stats *epic_get_stats(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + + if (netif_running(dev)) { + struct net_device_stats *stats = &dev->stats; + + stats->rx_missed_errors += er8(MPCNT); + stats->rx_frame_errors += er8(ALICNT); + stats->rx_crc_errors += er8(CRCCNT); + } + + return &dev->stats; +} + +/* Set or clear the multicast filter for this adaptor. + Note that we only use exclusion around actually queueing the + new frame, not around filling ep->setup_frame. This is non-deterministic + when re-entered but still correct. */ + +static void set_rx_mode(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + unsigned char mc_filter[8]; /* Multicast hash filter */ + int i; + + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + ew32(RxCtrl, 0x002c); + /* Unconditionally log net taps. */ + memset(mc_filter, 0xff, sizeof(mc_filter)); + } else if ((!netdev_mc_empty(dev)) || (dev->flags & IFF_ALLMULTI)) { + /* There is apparently a chip bug, so the multicast filter + is never enabled. */ + /* Too many to filter perfectly -- accept all multicasts. */ + memset(mc_filter, 0xff, sizeof(mc_filter)); + ew32(RxCtrl, 0x000c); + } else if (netdev_mc_empty(dev)) { + ew32(RxCtrl, 0x0004); + return; + } else { /* Never executed, for now. */ + struct netdev_hw_addr *ha; + + memset(mc_filter, 0, sizeof(mc_filter)); + netdev_for_each_mc_addr(ha, dev) { + unsigned int bit_nr = + ether_crc_le(ETH_ALEN, ha->addr) & 0x3f; + mc_filter[bit_nr >> 3] |= (1 << bit_nr); + } + } + /* ToDo: perhaps we need to stop the Tx and Rx process here? */ + if (memcmp(mc_filter, ep->mc_filter, sizeof(mc_filter))) { + for (i = 0; i < 4; i++) + ew16(MC0 + i*4, ((u16 *)mc_filter)[i]); + memcpy(ep->mc_filter, mc_filter, sizeof(mc_filter)); + } +} + +static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct epic_private *np = netdev_priv(dev); + + strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); + strlcpy(info->version, DRV_VERSION, sizeof(info->version)); + strlcpy(info->bus_info, pci_name(np->pci_dev), sizeof(info->bus_info)); +} + +static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct epic_private *np = netdev_priv(dev); + int rc; + + spin_lock_irq(&np->lock); + rc = mii_ethtool_gset(&np->mii, cmd); + spin_unlock_irq(&np->lock); + + return rc; +} + +static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct epic_private *np = netdev_priv(dev); + int rc; + + spin_lock_irq(&np->lock); + rc = mii_ethtool_sset(&np->mii, cmd); + spin_unlock_irq(&np->lock); + + return rc; +} + +static int netdev_nway_reset(struct net_device *dev) +{ + struct epic_private *np = netdev_priv(dev); + return mii_nway_restart(&np->mii); +} + +static u32 netdev_get_link(struct net_device *dev) +{ + struct epic_private *np = netdev_priv(dev); + return mii_link_ok(&np->mii); +} + +static u32 netdev_get_msglevel(struct net_device *dev) +{ + return debug; +} + +static void netdev_set_msglevel(struct net_device *dev, u32 value) +{ + debug = value; +} + +static int ethtool_begin(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + + /* power-up, if interface is down */ + if (!netif_running(dev)) { + ew32(GENCTL, 0x0200); + ew32(NVCTL, (er32(NVCTL) & ~0x003c) | 0x4800); + } + return 0; +} + +static void ethtool_complete(struct net_device *dev) +{ + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + + /* power-down, if interface is down */ + if (!netif_running(dev)) { + ew32(GENCTL, 0x0008); + ew32(NVCTL, (er32(NVCTL) & ~0x483c) | 0x0000); + } +} + +static const struct ethtool_ops netdev_ethtool_ops = { + .get_drvinfo = netdev_get_drvinfo, + .get_settings = netdev_get_settings, + .set_settings = netdev_set_settings, + .nway_reset = netdev_nway_reset, + .get_link = netdev_get_link, + .get_msglevel = netdev_get_msglevel, + .set_msglevel = netdev_set_msglevel, + .begin = ethtool_begin, + .complete = ethtool_complete +}; + +static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct epic_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->ioaddr; + struct mii_ioctl_data *data = if_mii(rq); + int rc; + + /* power-up, if interface is down */ + if (! netif_running(dev)) { + ew32(GENCTL, 0x0200); + ew32(NVCTL, (er32(NVCTL) & ~0x003c) | 0x4800); + } + + /* all non-ethtool ioctls (the SIOC[GS]MIIxxx ioctls) */ + spin_lock_irq(&np->lock); + rc = generic_mii_ioctl(&np->mii, data, cmd, NULL); + spin_unlock_irq(&np->lock); + + /* power-down, if interface is down */ + if (! netif_running(dev)) { + ew32(GENCTL, 0x0008); + ew32(NVCTL, (er32(NVCTL) & ~0x483c) | 0x0000); + } + return rc; +} + + +static void epic_remove_one(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct epic_private *ep = netdev_priv(dev); + + pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma); + pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma); + unregister_netdev(dev); + pci_iounmap(pdev, ep->ioaddr); + pci_release_regions(pdev); + free_netdev(dev); + pci_disable_device(pdev); + /* pci_power_off(pdev, -1); */ +} + + +#ifdef CONFIG_PM + +static int epic_suspend (struct pci_dev *pdev, pm_message_t state) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct epic_private *ep = netdev_priv(dev); + void __iomem *ioaddr = ep->ioaddr; + + if (!netif_running(dev)) + return 0; + epic_pause(dev); + /* Put the chip into low-power mode. */ + ew32(GENCTL, 0x0008); + /* pci_power_off(pdev, -1); */ + return 0; +} + + +static int epic_resume (struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + + if (!netif_running(dev)) + return 0; + epic_restart(dev); + /* pci_power_on(pdev); */ + return 0; +} + +#endif /* CONFIG_PM */ + + +static struct pci_driver epic_driver = { + .name = DRV_NAME, + .id_table = epic_pci_tbl, + .probe = epic_init_one, + .remove = epic_remove_one, +#ifdef CONFIG_PM + .suspend = epic_suspend, + .resume = epic_resume, +#endif /* CONFIG_PM */ +}; + + +static int __init epic_init (void) +{ +/* when a module, this is printed whether or not devices are found in probe */ +#ifdef MODULE + pr_info("%s%s\n", version, version2); +#endif + + return pci_register_driver(&epic_driver); +} + + +static void __exit epic_cleanup (void) +{ + pci_unregister_driver (&epic_driver); +} + + +module_init(epic_init); +module_exit(epic_cleanup); |