diff options
Diffstat (limited to 'drivers/net/yellowfin.c')
| -rw-r--r-- | drivers/net/yellowfin.c | 1499 |
1 files changed, 1499 insertions, 0 deletions
diff --git a/drivers/net/yellowfin.c b/drivers/net/yellowfin.c new file mode 100644 index 000000000000..9da925430109 --- /dev/null +++ b/drivers/net/yellowfin.c @@ -0,0 +1,1499 @@ +/* yellowfin.c: A Packet Engines G-NIC ethernet driver for linux. */ +/* + Written 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 Packet Engines G-NIC PCI Gigabit Ethernet adapter. + It also supports the Symbios Logic version of the same chip core. + + 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/yellowfin.html + + + Linux kernel changelog: + ----------------------- + + LK1.1.1 (jgarzik): Port to 2.4 kernel + + LK1.1.2 (jgarzik): + * Merge in becker version 1.05 + + LK1.1.3 (jgarzik): + * Various cleanups + * Update yellowfin_timer to correctly calculate duplex. + (suggested by Manfred Spraul) + + LK1.1.4 (val@nmt.edu): + * Fix three endian-ness bugs + * Support dual function SYM53C885E ethernet chip + + LK1.1.5 (val@nmt.edu): + * Fix forced full-duplex bug I introduced + + LK1.1.6 (val@nmt.edu): + * Only print warning on truly "oversized" packets + * Fix theoretical bug on gigabit cards - return to 1.1.3 behavior + +*/ + +#define DRV_NAME "yellowfin" +#define DRV_VERSION "1.05+LK1.1.6" +#define DRV_RELDATE "Feb 11, 2002" + +#define PFX DRV_NAME ": " + +/* 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 events (Rx packets, etc.) to handle at each interrupt. */ +static int max_interrupt_work = 20; +static int mtu; +#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ +/* System-wide count of bogus-rx frames. */ +static int bogus_rx; +static int dma_ctrl = 0x004A0263; /* Constrained by errata */ +static int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */ +#elif defined(YF_NEW) /* A future perfect board :->. */ +static int dma_ctrl = 0x00CAC277; /* Override when loading module! */ +static int fifo_cfg = 0x0028; +#else +static int dma_ctrl = 0x004A0263; /* Constrained by errata */ +static int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */ +#endif + +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + Setting to > 1514 effectively disables this feature. */ +static int rx_copybreak; + +/* Used to pass the media type, etc. + No media types are currently defined. These exist for driver + interoperability. +*/ +#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}; + +/* Do ugly workaround for GX server chipset errata. */ +static int gx_fix; + +/* Operational parameters that are set at compile time. */ + +/* Keep the ring sizes a power of two for efficiency. + Making the Tx ring too long decreases the effectiveness of channel + bonding and packet priority. + There are no ill effects from too-large receive rings. */ +#define TX_RING_SIZE 16 +#define TX_QUEUE_SIZE 12 /* Must be > 4 && <= TX_RING_SIZE */ +#define RX_RING_SIZE 64 +#define STATUS_TOTAL_SIZE TX_RING_SIZE*sizeof(struct tx_status_words) +#define TX_TOTAL_SIZE 2*TX_RING_SIZE*sizeof(struct yellowfin_desc) +#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct yellowfin_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.*/ + +#define yellowfin_debug debug + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/mii.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/ethtool.h> +#include <linux/crc32.h> +#include <linux/bitops.h> +#include <asm/uaccess.h> +#include <asm/processor.h> /* Processor type for cache alignment. */ +#include <asm/unaligned.h> +#include <asm/io.h> + +/* These identify the driver base version and may not be removed. */ +static char version[] __devinitdata = +KERN_INFO DRV_NAME ".c:v1.05 1/09/2001 Written by Donald Becker <becker@scyld.com>\n" +KERN_INFO " http://www.scyld.com/network/yellowfin.html\n" +KERN_INFO " (unofficial 2.4.x port, " DRV_VERSION ", " DRV_RELDATE ")\n"; + +MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); +MODULE_DESCRIPTION("Packet Engines Yellowfin G-NIC Gigabit Ethernet driver"); +MODULE_LICENSE("GPL"); + +module_param(max_interrupt_work, int, 0); +module_param(mtu, int, 0); +module_param(debug, int, 0); +module_param(rx_copybreak, int, 0); +module_param_array(options, int, NULL, 0); +module_param_array(full_duplex, int, NULL, 0); +module_param(gx_fix, int, 0); +MODULE_PARM_DESC(max_interrupt_work, "G-NIC maximum events handled per interrupt"); +MODULE_PARM_DESC(mtu, "G-NIC MTU (all boards)"); +MODULE_PARM_DESC(debug, "G-NIC debug level (0-7)"); +MODULE_PARM_DESC(rx_copybreak, "G-NIC copy breakpoint for copy-only-tiny-frames"); +MODULE_PARM_DESC(options, "G-NIC: Bits 0-3: media type, bit 17: full duplex"); +MODULE_PARM_DESC(full_duplex, "G-NIC full duplex setting(s) (1)"); +MODULE_PARM_DESC(gx_fix, "G-NIC: enable GX server chipset bug workaround (0-1)"); + +/* + Theory of Operation + +I. Board Compatibility + +This device driver is designed for the Packet Engines "Yellowfin" Gigabit +Ethernet adapter. The G-NIC 64-bit PCI card is supported, as well as the +Symbios 53C885E dual function chip. + +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 preferably should assign the +PCI INTA signal to an 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 + +The Yellowfin uses the Descriptor Based DMA Architecture specified by Apple. +This is a descriptor list scheme similar to that used by the EEPro100 and +Tulip. This driver uses two statically allocated fixed-size descriptor lists +formed into rings by a branch from the final descriptor to the beginning of +the list. The ring sizes are set at compile time by RX/TX_RING_SIZE. + +The driver allocates full frame size skbuffs for the Rx ring buffers at +open() time and passes the skb->data field to the Yellowfin 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 and replaced by a newly allocated skbuff. + +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. For small frames the copying cost is negligible (esp. considering +that we are pre-loading the cache with immediately useful header +information). For large frames the copying cost is non-trivial, and the +larger copy might flush the cache of useful data. + +IIIC. 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 other 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 'yp->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 'yp->tx_full' flag is set, it +clears both the tx_full and tbusy flags. + +IV. Notes + +Thanks to Kim Stearns of Packet Engines for providing a pair of G-NIC boards. +Thanks to Bruce Faust of Digitalscape for providing both their SYM53C885 board +and an AlphaStation to verifty the Alpha port! + +IVb. References + +Yellowfin Engineering Design Specification, 4/23/97 Preliminary/Confidential +Symbios SYM53C885 PCI-SCSI/Fast Ethernet Multifunction Controller Preliminary + Data Manual v3.0 +http://cesdis.gsfc.nasa.gov/linux/misc/NWay.html +http://cesdis.gsfc.nasa.gov/linux/misc/100mbps.html + +IVc. Errata + +See Packet Engines confidential appendix (prototype chips only). +*/ + + + +enum pci_id_flags_bits { + /* Set PCI command register bits before calling probe1(). */ + PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4, + /* Read and map the single following PCI BAR. */ + PCI_ADDR0=0<<4, PCI_ADDR1=1<<4, PCI_ADDR2=2<<4, PCI_ADDR3=3<<4, + PCI_ADDR_64BITS=0x100, PCI_NO_ACPI_WAKE=0x200, PCI_NO_MIN_LATENCY=0x400, + PCI_UNUSED_IRQ=0x800, +}; +enum capability_flags { + HasMII=1, FullTxStatus=2, IsGigabit=4, HasMulticastBug=8, FullRxStatus=16, + HasMACAddrBug=32, /* Only on early revs. */ + DontUseEeprom=64, /* Don't read the MAC from the EEPROm. */ +}; +/* The PCI I/O space extent. */ +#define YELLOWFIN_SIZE 0x100 +#ifdef USE_IO_OPS +#define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_IO | PCI_ADDR0) +#else +#define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR1) +#endif + +struct pci_id_info { + const char *name; + struct match_info { + int pci, pci_mask, subsystem, subsystem_mask; + int revision, revision_mask; /* Only 8 bits. */ + } id; + enum pci_id_flags_bits pci_flags; + int io_size; /* Needed for I/O region check or ioremap(). */ + int drv_flags; /* Driver use, intended as capability flags. */ +}; + +static struct pci_id_info pci_id_tbl[] = { + {"Yellowfin G-NIC Gigabit Ethernet", { 0x07021000, 0xffffffff}, + PCI_IOTYPE, YELLOWFIN_SIZE, + FullTxStatus | IsGigabit | HasMulticastBug | HasMACAddrBug | DontUseEeprom}, + {"Symbios SYM83C885", { 0x07011000, 0xffffffff}, + PCI_IOTYPE, YELLOWFIN_SIZE, HasMII | DontUseEeprom }, + {NULL,}, +}; + +static struct pci_device_id yellowfin_pci_tbl[] = { + { 0x1000, 0x0702, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { 0x1000, 0x0701, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, + { 0, } +}; +MODULE_DEVICE_TABLE (pci, yellowfin_pci_tbl); + + +/* Offsets to the Yellowfin registers. Various sizes and alignments. */ +enum yellowfin_offsets { + TxCtrl=0x00, TxStatus=0x04, TxPtr=0x0C, + TxIntrSel=0x10, TxBranchSel=0x14, TxWaitSel=0x18, + RxCtrl=0x40, RxStatus=0x44, RxPtr=0x4C, + RxIntrSel=0x50, RxBranchSel=0x54, RxWaitSel=0x58, + EventStatus=0x80, IntrEnb=0x82, IntrClear=0x84, IntrStatus=0x86, + ChipRev=0x8C, DMACtrl=0x90, TxThreshold=0x94, + Cnfg=0xA0, FrameGap0=0xA2, FrameGap1=0xA4, + MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC, + MII_Status=0xAE, + RxDepth=0xB8, FlowCtrl=0xBC, + AddrMode=0xD0, StnAddr=0xD2, HashTbl=0xD8, FIFOcfg=0xF8, + EEStatus=0xF0, EECtrl=0xF1, EEAddr=0xF2, EERead=0xF3, EEWrite=0xF4, + EEFeature=0xF5, +}; + +/* The Yellowfin Rx and Tx buffer descriptors. + Elements are written as 32 bit for endian portability. */ +struct yellowfin_desc { + u32 dbdma_cmd; + u32 addr; + u32 branch_addr; + u32 result_status; +}; + +struct tx_status_words { +#ifdef __BIG_ENDIAN + u16 tx_errs; + u16 tx_cnt; + u16 paused; + u16 total_tx_cnt; +#else /* Little endian chips. */ + u16 tx_cnt; + u16 tx_errs; + u16 total_tx_cnt; + u16 paused; +#endif /* __BIG_ENDIAN */ +}; + +/* Bits in yellowfin_desc.cmd */ +enum desc_cmd_bits { + CMD_TX_PKT=0x10000000, CMD_RX_BUF=0x20000000, CMD_TXSTATUS=0x30000000, + CMD_NOP=0x60000000, CMD_STOP=0x70000000, + BRANCH_ALWAYS=0x0C0000, INTR_ALWAYS=0x300000, WAIT_ALWAYS=0x030000, + BRANCH_IFTRUE=0x040000, +}; + +/* Bits in yellowfin_desc.status */ +enum desc_status_bits { RX_EOP=0x0040, }; + +/* Bits in the interrupt status/mask registers. */ +enum intr_status_bits { + IntrRxDone=0x01, IntrRxInvalid=0x02, IntrRxPCIFault=0x04,IntrRxPCIErr=0x08, + IntrTxDone=0x10, IntrTxInvalid=0x20, IntrTxPCIFault=0x40,IntrTxPCIErr=0x80, + IntrEarlyRx=0x100, IntrWakeup=0x200, }; + +#define PRIV_ALIGN 31 /* Required alignment mask */ +#define MII_CNT 4 +struct yellowfin_private { + /* Descriptor rings first for alignment. + Tx requires a second descriptor for status. */ + struct yellowfin_desc *rx_ring; + struct yellowfin_desc *tx_ring; + struct sk_buff* rx_skbuff[RX_RING_SIZE]; + struct sk_buff* tx_skbuff[TX_RING_SIZE]; + dma_addr_t rx_ring_dma; + dma_addr_t tx_ring_dma; + + struct tx_status_words *tx_status; + dma_addr_t tx_status_dma; + + struct timer_list timer; /* Media selection timer. */ + struct net_device_stats stats; + /* Frequently used and paired value: keep adjacent for cache effect. */ + int chip_id, drv_flags; + struct pci_dev *pci_dev; + unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */ + unsigned int rx_buf_sz; /* Based on MTU+slack. */ + struct tx_status_words *tx_tail_desc; + unsigned int cur_tx, dirty_tx; + int tx_threshold; + unsigned int tx_full:1; /* The Tx queue is full. */ + unsigned int full_duplex:1; /* Full-duplex operation requested. */ + unsigned int duplex_lock:1; + unsigned int medialock:1; /* Do not sense media. */ + unsigned int default_port:4; /* Last dev->if_port value. */ + /* MII transceiver section. */ + int mii_cnt; /* MII device addresses. */ + u16 advertising; /* NWay media advertisement */ + unsigned char phys[MII_CNT]; /* MII device addresses, only first one used */ + spinlock_t lock; + void __iomem *base; +}; + +static int read_eeprom(void __iomem *ioaddr, int location); +static int mdio_read(void __iomem *ioaddr, int phy_id, int location); +static void mdio_write(void __iomem *ioaddr, int phy_id, int location, int value); +static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +static int yellowfin_open(struct net_device *dev); +static void yellowfin_timer(unsigned long data); +static void yellowfin_tx_timeout(struct net_device *dev); +static void yellowfin_init_ring(struct net_device *dev); +static int yellowfin_start_xmit(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t yellowfin_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +static int yellowfin_rx(struct net_device *dev); +static void yellowfin_error(struct net_device *dev, int intr_status); +static int yellowfin_close(struct net_device *dev); +static struct net_device_stats *yellowfin_get_stats(struct net_device *dev); +static void set_rx_mode(struct net_device *dev); +static struct ethtool_ops ethtool_ops; + + +static int __devinit yellowfin_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct net_device *dev; + struct yellowfin_private *np; + int irq; + int chip_idx = ent->driver_data; + static int find_cnt; + void __iomem *ioaddr; + int i, option = find_cnt < MAX_UNITS ? options[find_cnt] : 0; + int drv_flags = pci_id_tbl[chip_idx].drv_flags; + void *ring_space; + dma_addr_t ring_dma; +#ifdef USE_IO_OPS + int bar = 0; +#else + int bar = 1; +#endif + +/* when built into the kernel, we only print version if device is found */ +#ifndef MODULE + static int printed_version; + if (!printed_version++) + printk(version); +#endif + + i = pci_enable_device(pdev); + if (i) return i; + + dev = alloc_etherdev(sizeof(*np)); + if (!dev) { + printk (KERN_ERR PFX "cannot allocate ethernet device\n"); + return -ENOMEM; + } + SET_MODULE_OWNER(dev); + SET_NETDEV_DEV(dev, &pdev->dev); + + np = netdev_priv(dev); + + if (pci_request_regions(pdev, DRV_NAME)) + goto err_out_free_netdev; + + pci_set_master (pdev); + + ioaddr = pci_iomap(pdev, bar, YELLOWFIN_SIZE); + if (!ioaddr) + goto err_out_free_res; + + irq = pdev->irq; + + if (drv_flags & DontUseEeprom) + for (i = 0; i < 6; i++) + dev->dev_addr[i] = ioread8(ioaddr + StnAddr + i); + else { + int ee_offset = (read_eeprom(ioaddr, 6) == 0xff ? 0x100 : 0); + for (i = 0; i < 6; i++) + dev->dev_addr[i] = read_eeprom(ioaddr, ee_offset + i); + } + + /* Reset the chip. */ + iowrite32(0x80000000, ioaddr + DMACtrl); + + dev->base_addr = (unsigned long)ioaddr; + dev->irq = irq; + + pci_set_drvdata(pdev, dev); + spin_lock_init(&np->lock); + + np->pci_dev = pdev; + np->chip_id = chip_idx; + np->drv_flags = drv_flags; + np->base = ioaddr; + + ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma); + if (!ring_space) + goto err_out_cleardev; + np->tx_ring = (struct yellowfin_desc *)ring_space; + np->tx_ring_dma = ring_dma; + + ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma); + if (!ring_space) + goto err_out_unmap_tx; + np->rx_ring = (struct yellowfin_desc *)ring_space; + np->rx_ring_dma = ring_dma; + + ring_space = pci_alloc_consistent(pdev, STATUS_TOTAL_SIZE, &ring_dma); + if (!ring_space) + goto err_out_unmap_rx; + np->tx_status = (struct tx_status_words *)ring_space; + np->tx_status_dma = ring_dma; + + if (dev->mem_start) + option = dev->mem_start; + + /* The lower four bits are the media type. */ + if (option > 0) { + if (option & 0x200) + np->full_duplex = 1; + np->default_port = option & 15; + if (np->default_port) + np->medialock = 1; + } + if (find_cnt < MAX_UNITS && full_duplex[find_cnt] > 0) + np->full_duplex = 1; + + if (np->full_duplex) + np->duplex_lock = 1; + + /* The Yellowfin-specific entries in the device structure. */ + dev->open = &yellowfin_open; + dev->hard_start_xmit = &yellowfin_start_xmit; + dev->stop = &yellowfin_close; + dev->get_stats = &yellowfin_get_stats; + dev->set_multicast_list = &set_rx_mode; + dev->do_ioctl = &netdev_ioctl; + SET_ETHTOOL_OPS(dev, ðtool_ops); + dev->tx_timeout = yellowfin_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + + if (mtu) + dev->mtu = mtu; + + i = register_netdev(dev); + if (i) + goto err_out_unmap_status; + + printk(KERN_INFO "%s: %s type %8x at %p, ", + dev->name, pci_id_tbl[chip_idx].name, + ioread32(ioaddr + ChipRev), ioaddr); + for (i = 0; i < 5; i++) + printk("%2.2x:", dev->dev_addr[i]); + printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq); + + if (np->drv_flags & HasMII) { + int phy, phy_idx = 0; + for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) { + int mii_status = mdio_read(ioaddr, phy, 1); + if (mii_status != 0xffff && mii_status != 0x0000) { + np->phys[phy_idx++] = phy; + np->advertising = mdio_read(ioaddr, phy, 4); + printk(KERN_INFO "%s: MII PHY found at address %d, status " + "0x%4.4x advertising %4.4x.\n", + dev->name, phy, mii_status, np->advertising); + } + } + np->mii_cnt = phy_idx; + } + + find_cnt++; + + return 0; + +err_out_unmap_status: + pci_free_consistent(pdev, STATUS_TOTAL_SIZE, np->tx_status, + np->tx_status_dma); +err_out_unmap_rx: + pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma); +err_out_unmap_tx: + pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma); +err_out_cleardev: + pci_set_drvdata(pdev, NULL); + pci_iounmap(pdev, ioaddr); +err_out_free_res: + pci_release_regions(pdev); +err_out_free_netdev: + free_netdev (dev); + return -ENODEV; +} + +static int __devinit read_eeprom(void __iomem *ioaddr, int location) +{ + int bogus_cnt = 10000; /* Typical 33Mhz: 1050 ticks */ + + iowrite8(location, ioaddr + EEAddr); + iowrite8(0x30 | ((location >> 8) & 7), ioaddr + EECtrl); + while ((ioread8(ioaddr + EEStatus) & 0x80) && --bogus_cnt > 0) + ; + return ioread8(ioaddr + EERead); +} + +/* MII Managemen Data I/O accesses. + These routines assume the MDIO controller is idle, and do not exit until + the command is finished. */ + +static int mdio_read(void __iomem *ioaddr, int phy_id, int location) +{ + int i; + + iowrite16((phy_id<<8) + location, ioaddr + MII_Addr); + iowrite16(1, ioaddr + MII_Cmd); + for (i = 10000; i >= 0; i--) + if ((ioread16(ioaddr + MII_Status) & 1) == 0) + break; + return ioread16(ioaddr + MII_Rd_Data); +} + +static void mdio_write(void __iomem *ioaddr, int phy_id, int location, int value) +{ + int i; + + iowrite16((phy_id<<8) + location, ioaddr + MII_Addr); + iowrite16(value, ioaddr + MII_Wr_Data); + + /* Wait for the command to finish. */ + for (i = 10000; i >= 0; i--) + if ((ioread16(ioaddr + MII_Status) & 1) == 0) + break; + return; +} + + +static int yellowfin_open(struct net_device *dev) +{ + struct yellowfin_private *yp = netdev_priv(dev); + void __iomem *ioaddr = yp->base; + int i; + + /* Reset the chip. */ + iowrite32(0x80000000, ioaddr + DMACtrl); + + i = request_irq(dev->irq, &yellowfin_interrupt, SA_SHIRQ, dev->name, dev); + if (i) return i; + + if (yellowfin_debug > 1) + printk(KERN_DEBUG "%s: yellowfin_open() irq %d.\n", + dev->name, dev->irq); + + yellowfin_init_ring(dev); + + iowrite32(yp->rx_ring_dma, ioaddr + RxPtr); + iowrite32(yp->tx_ring_dma, ioaddr + TxPtr); + + for (i = 0; i < 6; i++) + iowrite8(dev->dev_addr[i], ioaddr + StnAddr + i); + + /* Set up various condition 'select' registers. + There are no options here. */ + iowrite32(0x00800080, ioaddr + TxIntrSel); /* Interrupt on Tx abort */ + iowrite32(0x00800080, ioaddr + TxBranchSel); /* Branch on Tx abort */ + iowrite32(0x00400040, ioaddr + TxWaitSel); /* Wait on Tx status */ + iowrite32(0x00400040, ioaddr + RxIntrSel); /* Interrupt on Rx done */ + iowrite32(0x00400040, ioaddr + RxBranchSel); /* Branch on Rx error */ + iowrite32(0x00400040, ioaddr + RxWaitSel); /* Wait on Rx done */ + + /* Initialize other registers: with so many this eventually this will + converted to an offset/value list. */ + iowrite32(dma_ctrl, ioaddr + DMACtrl); + iowrite16(fifo_cfg, ioaddr + FIFOcfg); + /* Enable automatic generation of flow control frames, period 0xffff. */ + iowrite32(0x0030FFFF, ioaddr + FlowCtrl); + + yp->tx_threshold = 32; + iowrite32(yp->tx_threshold, ioaddr + TxThreshold); + + if (dev->if_port == 0) + dev->if_port = yp->default_port; + + netif_start_queue(dev); + + /* Setting the Rx mode will start the Rx process. */ + if (yp->drv_flags & IsGigabit) { + /* We are always in full-duplex mode with gigabit! */ + yp->full_duplex = 1; + iowrite16(0x01CF, ioaddr + Cnfg); + } else { + iowrite16(0x0018, ioaddr + FrameGap0); /* 0060/4060 for non-MII 10baseT */ + iowrite16(0x1018, ioaddr + FrameGap1); + iowrite16(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg); + } + set_rx_mode(dev); + + /* Enable interrupts by setting the interrupt mask. */ + iowrite16(0x81ff, ioaddr + IntrEnb); /* See enum intr_status_bits */ + iowrite16(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */ + iowrite32(0x80008000, ioaddr + RxCtrl); /* Start Rx and Tx channels. */ + iowrite32(0x80008000, ioaddr + TxCtrl); + + if (yellowfin_debug > 2) { + printk(KERN_DEBUG "%s: Done yellowfin_open().\n", + dev->name); + } + + /* Set the timer to check for link beat. */ + init_timer(&yp->timer); + yp->timer.expires = jiffies + 3*HZ; + yp->timer.data = (unsigned long)dev; + yp->timer.function = &yellowfin_timer; /* timer handler */ + add_timer(&yp->timer); + + return 0; +} + +static void yellowfin_timer(unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct yellowfin_private *yp = netdev_priv(dev); + void __iomem *ioaddr = yp->base; + int next_tick = 60*HZ; + + if (yellowfin_debug > 3) { + printk(KERN_DEBUG "%s: Yellowfin timer tick, status %8.8x.\n", + dev->name, ioread16(ioaddr + IntrStatus)); + } + + if (yp->mii_cnt) { + int bmsr = mdio_read(ioaddr, yp->phys[0], MII_BMSR); + int lpa = mdio_read(ioaddr, yp->phys[0], MII_LPA); + int negotiated = lpa & yp->advertising; + if (yellowfin_debug > 1) + printk(KERN_DEBUG "%s: MII #%d status register is %4.4x, " + "link partner capability %4.4x.\n", + dev->name, yp->phys[0], bmsr, lpa); + + yp->full_duplex = mii_duplex(yp->duplex_lock, negotiated); + + iowrite16(0x101C | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg); + + if (bmsr & BMSR_LSTATUS) + next_tick = 60*HZ; + else + next_tick = 3*HZ; + } + + yp->timer.expires = jiffies + next_tick; + add_timer(&yp->timer); +} + +static void yellowfin_tx_timeout(struct net_device *dev) +{ + struct yellowfin_private *yp = netdev_priv(dev); + void __iomem *ioaddr = yp->base; + + printk(KERN_WARNING "%s: Yellowfin transmit timed out at %d/%d Tx " + "status %4.4x, Rx status %4.4x, resetting...\n", + dev->name, yp->cur_tx, yp->dirty_tx, + ioread32(ioaddr + TxStatus), ioread32(ioaddr + RxStatus)); + + /* Note: these should be KERN_DEBUG. */ + if (yellowfin_debug) { + int i; + printk(KERN_WARNING " Rx ring %p: ", yp->rx_ring); + for (i = 0; i < RX_RING_SIZE; i++) + printk(" %8.8x", yp->rx_ring[i].result_status); + printk("\n"KERN_WARNING" Tx ring %p: ", yp->tx_ring); + for (i = 0; i < TX_RING_SIZE; i++) + printk(" %4.4x /%8.8x", yp->tx_status[i].tx_errs, + yp->tx_ring[i].result_status); + printk("\n"); + } + + /* If the hardware is found to hang regularly, we will update the code + to reinitialize the chip here. */ + dev->if_port = 0; + + /* Wake the potentially-idle transmit channel. */ + iowrite32(0x10001000, yp->base + TxCtrl); + if (yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE) + netif_wake_queue (dev); /* Typical path */ + + dev->trans_start = jiffies; + yp->stats.tx_errors++; +} + +/* Initialize the Rx and Tx rings, along with various 'dev' bits. */ +static void yellowfin_init_ring(struct net_device *dev) +{ + struct yellowfin_private *yp = netdev_priv(dev); + int i; + + yp->tx_full = 0; + yp->cur_rx = yp->cur_tx = 0; + yp->dirty_tx = 0; + + yp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32); + + for (i = 0; i < RX_RING_SIZE; i++) { + yp->rx_ring[i].dbdma_cmd = + cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | yp->rx_buf_sz); + yp->rx_ring[i].branch_addr = cpu_to_le32(yp->rx_ring_dma + + ((i+1)%RX_RING_SIZE)*sizeof(struct yellowfin_desc)); + } + + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb = dev_alloc_skb(yp->rx_buf_sz); + yp->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. */ + yp->rx_ring[i].addr = cpu_to_le32(pci_map_single(yp->pci_dev, + skb->tail, yp->rx_buf_sz, PCI_DMA_FROMDEVICE)); + } + yp->rx_ring[i-1].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->dirty_rx = (unsigned int)(i - RX_RING_SIZE); + +#define NO_TXSTATS +#ifdef NO_TXSTATS + /* In this mode the Tx ring needs only a single descriptor. */ + for (i = 0; i < TX_RING_SIZE; i++) { + yp->tx_skbuff[i] = NULL; + yp->tx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->tx_ring[i].branch_addr = cpu_to_le32(yp->tx_ring_dma + + ((i+1)%TX_RING_SIZE)*sizeof(struct yellowfin_desc)); + } + /* Wrap ring */ + yp->tx_ring[--i].dbdma_cmd = cpu_to_le32(CMD_STOP | BRANCH_ALWAYS); +#else +{ + int j; + + /* Tx ring needs a pair of descriptors, the second for the status. */ + for (i = 0; i < TX_RING_SIZE; i++) { + j = 2*i; + yp->tx_skbuff[i] = 0; + /* Branch on Tx error. */ + yp->tx_ring[j].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->tx_ring[j].branch_addr = cpu_to_le32(yp->tx_ring_dma + + (j+1)*sizeof(struct yellowfin_desc); + j++; + if (yp->flags & FullTxStatus) { + yp->tx_ring[j].dbdma_cmd = + cpu_to_le32(CMD_TXSTATUS | sizeof(*yp->tx_status)); + yp->tx_ring[j].request_cnt = sizeof(*yp->tx_status); + yp->tx_ring[j].addr = cpu_to_le32(yp->tx_status_dma + + i*sizeof(struct tx_status_words); + } else { + /* Symbios chips write only tx_errs word. */ + yp->tx_ring[j].dbdma_cmd = + cpu_to_le32(CMD_TXSTATUS | INTR_ALWAYS | 2); + yp->tx_ring[j].request_cnt = 2; + /* Om pade ummmmm... */ + yp->tx_ring[j].addr = cpu_to_le32(yp->tx_status_dma + + i*sizeof(struct tx_status_words) + + &(yp->tx_status[0].tx_errs) - + &(yp->tx_status[0])); + } + yp->tx_ring[j].branch_addr = cpu_to_le32(yp->tx_ring_dma + + ((j+1)%(2*TX_RING_SIZE))*sizeof(struct yellowfin_desc)); + } + /* Wrap ring */ + yp->tx_ring[++j].dbdma_cmd |= cpu_to_le32(BRANCH_ALWAYS | INTR_ALWAYS); +} +#endif + yp->tx_tail_desc = &yp->tx_status[0]; + return; +} + +static int yellowfin_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct yellowfin_private *yp = netdev_priv(dev); + unsigned entry; + int len = skb->len; + + netif_stop_queue (dev); + + /* Note: Ordering is important here, set the field with the + "ownership" bit last, and only then increment cur_tx. */ + + /* Calculate the next Tx descriptor entry. */ + entry = yp->cur_tx % TX_RING_SIZE; + + if (gx_fix) { /* Note: only works for paddable protocols e.g. IP. */ + int cacheline_end = ((unsigned long)skb->data + skb->len) % 32; + /* Fix GX chipset errata. */ + if (cacheline_end > 24 || cacheline_end == 0) { + len = skb->len + 32 - cacheline_end + 1; + if (len != skb->len) + skb = skb_padto(skb, len); + } + if (skb == NULL) { + yp->tx_skbuff[entry] = NULL; + netif_wake_queue(dev); + return 0; + } + } + yp->tx_skbuff[entry] = skb; + +#ifdef NO_TXSTATS + yp->tx_ring[entry].addr = cpu_to_le32(pci_map_single(yp->pci_dev, + skb->data, len, PCI_DMA_TODEVICE)); + yp->tx_ring[entry].result_status = 0; + if (entry >= TX_RING_SIZE-1) { + /* New stop command. */ + yp->tx_ring[0].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->tx_ring[TX_RING_SIZE-1].dbdma_cmd = + cpu_to_le32(CMD_TX_PKT|BRANCH_ALWAYS | len); + } else { + yp->tx_ring[entry+1].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->tx_ring[entry].dbdma_cmd = + cpu_to_le32(CMD_TX_PKT | BRANCH_IFTRUE | len); + } + yp->cur_tx++; +#else + yp->tx_ring[entry<<1].request_cnt = len; + yp->tx_ring[entry<<1].addr = cpu_to_le32(pci_map_single(yp->pci_dev, + skb->data, len, PCI_DMA_TODEVICE)); + /* The input_last (status-write) command is constant, but we must + rewrite the subsequent 'stop' command. */ + + yp->cur_tx++; + { + unsigned next_entry = yp->cur_tx % TX_RING_SIZE; + yp->tx_ring[next_entry<<1].dbdma_cmd = cpu_to_le32(CMD_STOP); + } + /* Final step -- overwrite the old 'stop' command. */ + + yp->tx_ring[entry<<1].dbdma_cmd = + cpu_to_le32( ((entry % 6) == 0 ? CMD_TX_PKT|INTR_ALWAYS|BRANCH_IFTRUE : + CMD_TX_PKT | BRANCH_IFTRUE) | len); +#endif + + /* Non-x86 Todo: explicitly flush cache lines here. */ + + /* Wake the potentially-idle transmit channel. */ + iowrite32(0x10001000, yp->base + TxCtrl); + + if (yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE) + netif_start_queue (dev); /* Typical path */ + else + yp->tx_full = 1; + dev->trans_start = jiffies; + + if (yellowfin_debug > 4) { + printk(KERN_DEBUG "%s: Yellowfin transmit frame #%d queued in slot %d.\n", + dev->name, yp->cur_tx, entry); + } + return 0; +} + +/* The interrupt handler does all of the Rx thread work and cleans up + after the Tx thread. */ +static irqreturn_t yellowfin_interrupt(int irq, void *dev_instance, struct pt_regs *regs) +{ + struct net_device *dev = dev_instance; + struct yellowfin_private *yp; + void __iomem *ioaddr; + int boguscnt = max_interrupt_work; + unsigned int handled = 0; + +#ifndef final_version /* Can never occur. */ + if (dev == NULL) { + printk (KERN_ERR "yellowfin_interrupt(): irq %d for unknown device.\n", irq); + return IRQ_NONE; + } +#endif + + yp = netdev_priv(dev); + ioaddr = yp->base; + + spin_lock (&yp->lock); + + do { + u16 intr_status = ioread16(ioaddr + IntrClear); + + if (yellowfin_debug > 4) + printk(KERN_DEBUG "%s: Yellowfin interrupt, status %4.4x.\n", + dev->name, intr_status); + + if (intr_status == 0) + break; + handled = 1; + + if (intr_status & (IntrRxDone | IntrEarlyRx)) { + yellowfin_rx(dev); + iowrite32(0x10001000, ioaddr + RxCtrl); /* Wake Rx engine. */ + } + +#ifdef NO_TXSTATS + for (; yp->cur_tx - yp->dirty_tx > 0; yp->dirty_tx++) { + int entry = yp->dirty_tx % TX_RING_SIZE; + struct sk_buff *skb; + + if (yp->tx_ring[entry].result_status == 0) + break; + skb = yp->tx_skbuff[entry]; + yp->stats.tx_packets++; + yp->stats.tx_bytes += skb->len; + /* Free the original skb. */ + pci_unmap_single(yp->pci_dev, yp->tx_ring[entry].addr, + skb->len, PCI_DMA_TODEVICE); + dev_kfree_skb_irq(skb); + yp->tx_skbuff[entry] = NULL; + } + if (yp->tx_full + && yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE - 4) { + /* The ring is no longer full, clear tbusy. */ + yp->tx_full = 0; + netif_wake_queue(dev); + } +#else + if ((intr_status & IntrTxDone) || (yp->tx_tail_desc->tx_errs)) { + unsigned dirty_tx = yp->dirty_tx; + + for (dirty_tx = yp->dirty_tx; yp->cur_tx - dirty_tx > 0; + dirty_tx++) { + /* Todo: optimize this. */ + int entry = dirty_tx % TX_RING_SIZE; + u16 tx_errs = yp->tx_status[entry].tx_errs; + struct sk_buff *skb; + +#ifndef final_version + if (yellowfin_debug > 5) + printk(KERN_DEBUG "%s: Tx queue %d check, Tx status " + "%4.4x %4.4x %4.4x %4.4x.\n", + dev->name, entry, + yp->tx_status[entry].tx_cnt, + yp->tx_status[entry].tx_errs, + yp->tx_status[entry].total_tx_cnt, + yp->tx_status[entry].paused); +#endif + if (tx_errs == 0) + break; /* It still hasn't been Txed */ + skb = yp->tx_skbuff[entry]; + if (tx_errs & 0xF810) { + /* There was an major error, log it. */ +#ifndef final_version + if (yellowfin_debug > 1) + printk(KERN_DEBUG "%s: Transmit error, Tx status %4.4x.\n", + dev->name, tx_errs); +#endif + yp->stats.tx_errors++; + if (tx_errs & 0xF800) yp->stats.tx_aborted_errors++; + if (tx_errs & 0x0800) yp->stats.tx_carrier_errors++; + if (tx_errs & 0x2000) yp->stats.tx_window_errors++; + if (tx_errs & 0x8000) yp->stats.tx_fifo_errors++; + } else { +#ifndef final_version + if (yellowfin_debug > 4) + printk(KERN_DEBUG "%s: Normal transmit, Tx status %4.4x.\n", + dev->name, tx_errs); +#endif + yp->stats.tx_bytes += skb->len; + yp->stats.collisions += tx_errs & 15; + yp->stats.tx_packets++; + } + /* Free the original skb. */ + pci_unmap_single(yp->pci_dev, + yp->tx_ring[entry<<1].addr, skb->len, + PCI_DMA_TODEVICE); + dev_kfree_skb_irq(skb); + yp->tx_skbuff[entry] = 0; + /* Mark status as empty. */ + yp->tx_status[entry].tx_errs = 0; + } + +#ifndef final_version + if (yp->cur_tx - dirty_tx > TX_RING_SIZE) { + printk(KERN_ERR "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n", + dev->name, dirty_tx, yp->cur_tx, yp->tx_full); + dirty_tx += TX_RING_SIZE; + } +#endif + + if (yp->tx_full + && yp->cur_tx - dirty_tx < TX_QUEUE_SIZE - 2) { + /* The ring is no longer full, clear tbusy. */ + yp->tx_full = 0; + netif_wake_queue(dev); + } + + yp->dirty_tx = dirty_tx; + yp->tx_tail_desc = &yp->tx_status[dirty_tx % TX_RING_SIZE]; + } +#endif + + /* Log errors and other uncommon events. */ + if (intr_status & 0x2ee) /* Abnormal error summary. */ + yellowfin_error(dev, intr_status); + + if (--boguscnt < 0) { + printk(KERN_WARNING "%s: Too much work at interrupt, " + "status=0x%4.4x.\n", + dev->name, intr_status); + break; + } + } while (1); + + if (yellowfin_debug > 3) + printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n", + dev->name, ioread16(ioaddr + IntrStatus)); + + spin_unlock (&yp->lock); + return IRQ_RETVAL(handled); +} + +/* This routine is logically part of the interrupt handler, but separated + for clarity and better register allocation. */ +static int yellowfin_rx(struct net_device *dev) +{ + struct yellowfin_private *yp = netdev_priv(dev); + int entry = yp->cur_rx % RX_RING_SIZE; + int boguscnt = yp->dirty_rx + RX_RING_SIZE - yp->cur_rx; + + if (yellowfin_debug > 4) { + printk(KERN_DEBUG " In yellowfin_rx(), entry %d status %8.8x.\n", + entry, yp->rx_ring[entry].result_status); + printk(KERN_DEBUG " #%d desc. %8.8x %8.8x %8.8x.\n", + entry, yp->rx_ring[entry].dbdma_cmd, yp->rx_ring[entry].addr, + yp->rx_ring[entry].result_status); + } + + /* If EOP is set on the next entry, it's a new packet. Send it up. */ + while (1) { + struct yellowfin_desc *desc = &yp->rx_ring[entry]; + struct sk_buff *rx_skb = yp->rx_skbuff[entry]; + s16 frame_status; + u16 desc_status; + int data_size; + u8 *buf_addr; + + if(!desc->result_status) + break; + pci_dma_sync_single_for_cpu(yp->pci_dev, desc->addr, + yp->rx_buf_sz, PCI_DMA_FROMDEVICE); + desc_status = le32_to_cpu(desc->result_status) >> 16; + buf_addr = rx_skb->tail; + data_size = (le32_to_cpu(desc->dbdma_cmd) - + le32_to_cpu(desc->result_status)) & 0xffff; + frame_status = le16_to_cpu(get_unaligned((s16*)&(buf_addr[data_size - 2]))); + if (yellowfin_debug > 4) + printk(KERN_DEBUG " yellowfin_rx() status was %4.4x.\n", + frame_status); + if (--boguscnt < 0) + break; + if ( ! (desc_status & RX_EOP)) { + if (data_size != 0) + printk(KERN_WARNING "%s: Oversized Ethernet frame spanned multiple buffers," + " status %4.4x, data_size %d!\n", dev->name, desc_status, data_size); + yp->stats.rx_length_errors++; + } else if ((yp->drv_flags & IsGigabit) && (frame_status & 0x0038)) { + /* There was a error. */ + if (yellowfin_debug > 3) + printk(KERN_DEBUG " yellowfin_rx() Rx error was %4.4x.\n", + frame_status); + yp->stats.rx_errors++; + if (frame_status & 0x0060) yp->stats.rx_length_errors++; + if (frame_status & 0x0008) yp->stats.rx_frame_errors++; + if (frame_status & 0x0010) yp->stats.rx_crc_errors++; + if (frame_status < 0) yp->stats.rx_dropped++; + } else if ( !(yp->drv_flags & IsGigabit) && + ((buf_addr[data_size-1] & 0x85) || buf_addr[data_size-2] & 0xC0)) { + u8 status1 = buf_addr[data_size-2]; + u8 status2 = buf_addr[data_size-1]; + yp->stats.rx_errors++; + if (status1 & 0xC0) yp->stats.rx_length_errors++; + if (status2 & 0x03) yp->stats.rx_frame_errors++; + if (status2 & 0x04) yp->stats.rx_crc_errors++; + if (status2 & 0x80) yp->stats.rx_dropped++; +#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ + } else if ((yp->flags & HasMACAddrBug) && + memcmp(le32_to_cpu(yp->rx_ring_dma + + entry*sizeof(struct yellowfin_desc)), + dev->dev_addr, 6) != 0 && + memcmp(le32_to_cpu(yp->rx_ring_dma + + entry*sizeof(struct yellowfin_desc)), + "\377\377\377\377\377\377", 6) != 0) { + if (bogus_rx++ == 0) + printk(KERN_WARNING "%s: Bad frame to %2.2x:%2.2x:%2.2x:%2.2x:" + "%2.2x:%2.2x.\n", + dev->name, buf_addr[0], buf_addr[1], buf_addr[2], + buf_addr[3], buf_addr[4], buf_addr[5]); +#endif + } else { + struct sk_buff *skb; + int pkt_len = data_size - + (yp->chip_id ? 7 : 8 + buf_addr[data_size - 8]); + /* To verify: Yellowfin Length should omit the CRC! */ + +#ifndef final_version + if (yellowfin_debug > 4) + printk(KERN_DEBUG " yellowfin_rx() normal Rx pkt length %d" + " of %d, bogus_cnt %d.\n", + pkt_len, data_size, boguscnt); +#endif + /* Check if the packet is long enough to just pass up the skbuff + without copying to a properly sized skbuff. */ + if (pkt_len > rx_copybreak) { + skb_put(skb = rx_skb, pkt_len); + pci_unmap_single(yp->pci_dev, + yp->rx_ring[entry].addr, + yp->rx_buf_sz, + PCI_DMA_FROMDEVICE); + yp->rx_skbuff[entry] = NULL; + } else { + skb = dev_alloc_skb(pkt_len + 2); + if (skb == NULL) + break; + skb->dev = dev; + skb_reserve(skb, 2); /* 16 byte align the IP header */ + eth_copy_and_sum(skb, rx_skb->tail, pkt_len, 0); + skb_put(skb, pkt_len); + pci_dma_sync_single_for_device(yp->pci_dev, desc->addr, + yp->rx_buf_sz, + PCI_DMA_FROMDEVICE); + } + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->last_rx = jiffies; + yp->stats.rx_packets++; + yp->stats.rx_bytes += pkt_len; + } + entry = (++yp->cur_rx) % RX_RING_SIZE; + } + + /* Refill the Rx ring buffers. */ + for (; yp->cur_rx - yp->dirty_rx > 0; yp->dirty_rx++) { + entry = yp->dirty_rx % RX_RING_SIZE; + if (yp->rx_skbuff[entry] == NULL) { + struct sk_buff *skb = dev_alloc_skb(yp->rx_buf_sz); + if (skb == NULL) + break; /* Better luck next round. */ + yp->rx_skbuff[entry] = skb; + skb->dev = dev; /* Mark as being used by this device. */ + skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ + yp->rx_ring[entry].addr = cpu_to_le32(pci_map_single(yp->pci_dev, + skb->tail, yp->rx_buf_sz, PCI_DMA_FROMDEVICE)); + } + yp->rx_ring[entry].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->rx_ring[entry].result_status = 0; /* Clear complete bit. */ + if (entry != 0) + yp->rx_ring[entry - 1].dbdma_cmd = + cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | yp->rx_buf_sz); + else + yp->rx_ring[RX_RING_SIZE - 1].dbdma_cmd = + cpu_to_le32(CMD_RX_BUF | INTR_ALWAYS | BRANCH_ALWAYS + | yp->rx_buf_sz); + } + + return 0; +} + +static void yellowfin_error(struct net_device *dev, int intr_status) +{ + struct yellowfin_private *yp = netdev_priv(dev); + + printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n", + dev->name, intr_status); + /* Hmmmmm, it's not clear what to do here. */ + if (intr_status & (IntrTxPCIErr | IntrTxPCIFault)) + yp->stats.tx_errors++; + if (intr_status & (IntrRxPCIErr | IntrRxPCIFault)) + yp->stats.rx_errors++; +} + +static int yellowfin_close(struct net_device *dev) +{ + struct yellowfin_private *yp = netdev_priv(dev); + void __iomem *ioaddr = yp->base; + int i; + + netif_stop_queue (dev); + + if (yellowfin_debug > 1) { + printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x " + "Rx %4.4x Int %2.2x.\n", + dev->name, ioread16(ioaddr + TxStatus), + ioread16(ioaddr + RxStatus), + ioread16(ioaddr + IntrStatus)); + printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n", + dev->name, yp->cur_tx, yp->dirty_tx, yp->cur_rx, yp->dirty_rx); + } + + /* Disable interrupts by clearing the interrupt mask. */ + iowrite16(0x0000, ioaddr + IntrEnb); + + /* Stop the chip's Tx and Rx processes. */ + iowrite32(0x80000000, ioaddr + RxCtrl); + iowrite32(0x80000000, ioaddr + TxCtrl); + + del_timer(&yp->timer); + +#if defined(__i386__) + if (yellowfin_debug > 2) { + printk("\n"KERN_DEBUG" Tx ring at %8.8llx:\n", + (unsigned long long)yp->tx_ring_dma); + for (i = 0; i < TX_RING_SIZE*2; i++) + printk(" %c #%d desc. %8.8x %8.8x %8.8x %8.8x.\n", + ioread32(ioaddr + TxPtr) == (long)&yp->tx_ring[i] ? '>' : ' ', + i, yp->tx_ring[i].dbdma_cmd, yp->tx_ring[i].addr, + yp->tx_ring[i].branch_addr, yp->tx_ring[i].result_status); + printk(KERN_DEBUG " Tx status %p:\n", yp->tx_status); + for (i = 0; i < TX_RING_SIZE; i++) + printk(" #%d status %4.4x %4.4x %4.4x %4.4x.\n", + i, yp->tx_status[i].tx_cnt, yp->tx_status[i].tx_errs, + yp->tx_status[i].total_tx_cnt, yp->tx_status[i].paused); + + printk("\n"KERN_DEBUG " Rx ring %8.8llx:\n", + (unsigned long long)yp->rx_ring_dma); + for (i = 0; i < RX_RING_SIZE; i++) { + printk(KERN_DEBUG " %c #%d desc. %8.8x %8.8x %8.8x\n", + ioread32(ioaddr + RxPtr) == (long)&yp->rx_ring[i] ? '>' : ' ', + i, yp->rx_ring[i].dbdma_cmd, yp->rx_ring[i].addr, + yp->rx_ring[i].result_status); + if (yellowfin_debug > 6) { + if (get_unaligned((u8*)yp->rx_ring[i].addr) != 0x69) { + int j; + for (j = 0; j < 0x50; j++) + printk(" %4.4x", + get_unaligned(((u16*)yp->rx_ring[i].addr) + j)); + printk("\n"); + } + } + } + } +#endif /* __i386__ debugging only */ + + free_irq(dev->irq, dev); + + /* Free all the skbuffs in the Rx queue. */ + for (i = 0; i < RX_RING_SIZE; i++) { + yp->rx_ring[i].dbdma_cmd = cpu_to_le32(CMD_STOP); + yp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */ + if (yp->rx_skbuff[i]) { + dev_kfree_skb(yp->rx_skbuff[i]); + } + yp->rx_skbuff[i] = NULL; + } + for (i = 0; i < TX_RING_SIZE; i++) { + if (yp->tx_skbuff[i]) + dev_kfree_skb(yp->tx_skbuff[i]); + yp->tx_skbuff[i] = NULL; + } + +#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */ + if (yellowfin_debug > 0) { + printk(KERN_DEBUG "%s: Received %d frames that we should not have.\n", + dev->name, bogus_rx); + } +#endif + + return 0; +} + +static struct net_device_stats *yellowfin_get_stats(struct net_device *dev) +{ + struct yellowfin_private *yp = netdev_priv(dev); + return &yp->stats; +} + +/* Set or clear the multicast filter for this adaptor. */ + +static void set_rx_mode(struct net_device *dev) +{ + struct yellowfin_private *yp = netdev_priv(dev); + void __iomem *ioaddr = yp->base; + u16 cfg_value = ioread16(ioaddr + Cnfg); + + /* Stop the Rx process to change any value. */ + iowrite16(cfg_value & ~0x1000, ioaddr + Cnfg); + if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ + /* Unconditionally log net taps. */ + printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name); + iowrite16(0x000F, ioaddr + AddrMode); + } else if ((dev->mc_count > 64) || (dev->flags & IFF_ALLMULTI)) { + /* Too many to filter well, or accept all multicasts. */ + iowrite16(0x000B, ioaddr + AddrMode); + } else if (dev->mc_count > 0) { /* Must use the multicast hash table. */ + struct dev_mc_list *mclist; + u16 hash_table[4]; + int i; + memset(hash_table, 0, sizeof(hash_table)); + for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; + i++, mclist = mclist->next) { + unsigned int bit; + + /* Due to a bug in the early chip versions, multiple filter + slots must be set for each address. */ + if (yp->drv_flags & HasMulticastBug) { + bit = (ether_crc_le(3, mclist->dmi_addr) >> 3) & 0x3f; + hash_table[bit >> 4] |= (1 << bit); + bit = (ether_crc_le(4, mclist->dmi_addr) >> 3) & 0x3f; + hash_table[bit >> 4] |= (1 << bit); + bit = (ether_crc_le(5, mclist->dmi_addr) >> 3) & 0x3f; + hash_table[bit >> 4] |= (1 << bit); + } + bit = (ether_crc_le(6, mclist->dmi_addr) >> 3) & 0x3f; + hash_table[bit >> 4] |= (1 << bit); + } + /* Copy the hash table to the chip. */ + for (i = 0; i < 4; i++) + iowrite16(hash_table[i], ioaddr + HashTbl + i*2); + iowrite16(0x0003, ioaddr + AddrMode); + } else { /* Normal, unicast/broadcast-only mode. */ + iowrite16(0x0001, ioaddr + AddrMode); + } + /* Restart the Rx process. */ + iowrite16(cfg_value | 0x1000, ioaddr + Cnfg); +} + +static void yellowfin_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct yellowfin_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 struct ethtool_ops ethtool_ops = { + .get_drvinfo = yellowfin_get_drvinfo +}; + +static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct yellowfin_private *np = netdev_priv(dev); + void __iomem *ioaddr = np->base; + struct mii_ioctl_data *data = if_mii(rq); + + switch(cmd) { + case SIOCGMIIPHY: /* Get address of MII PHY in use. */ + data->phy_id = np->phys[0] & 0x1f; + /* Fall Through */ + + case SIOCGMIIREG: /* Read MII PHY register. */ + data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f, data->reg_num & 0x1f); + return 0; + + case SIOCSMIIREG: /* Write MII PHY register. */ + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + if (data->phy_id == np->phys[0]) { + u16 value = data->val_in; + switch (data->reg_num) { + case 0: + /* Check for autonegotiation on or reset. */ + np->medialock = (value & 0x9000) ? 0 : 1; + if (np->medialock) + np->full_duplex = (value & 0x0100) ? 1 : 0; + break; + case 4: np->advertising = value; break; + } + /* Perhaps check_duplex(dev), depending on chip semantics. */ + } + mdio_write(ioaddr, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in); + return 0; + default: + return -EOPNOTSUPP; + } +} + + +static void __devexit yellowfin_remove_one (struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct yellowfin_private *np; + + if (!dev) + BUG(); + np = netdev_priv(dev); + + pci_free_consistent(pdev, STATUS_TOTAL_SIZE, np->tx_status, + np->tx_status_dma); + pci_free_consistent(pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma); + pci_free_consistent(pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma); + unregister_netdev (dev); + + pci_iounmap(pdev, np->base); + + pci_release_regions (pdev); + + free_netdev (dev); + pci_set_drvdata(pdev, NULL); +} + + +static struct pci_driver yellowfin_driver = { + .name = DRV_NAME, + .id_table = yellowfin_pci_tbl, + .probe = yellowfin_init_one, + .remove = __devexit_p(yellowfin_remove_one), +}; + + +static int __init yellowfin_init (void) +{ +/* when a module, this is printed whether or not devices are found in probe */ +#ifdef MODULE + printk(version); +#endif + return pci_module_init (&yellowfin_driver); +} + + +static void __exit yellowfin_cleanup (void) +{ + pci_unregister_driver (&yellowfin_driver); +} + + +module_init(yellowfin_init); +module_exit(yellowfin_cleanup); + +/* + * Local variables: + * compile-command: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c yellowfin.c" + * compile-command-alphaLX: "gcc -DMODULE -Wall -Wstrict-prototypes -O2 -c yellowfin.c -fomit-frame-pointer -fno-strength-reduce -mno-fp-regs -Wa,-m21164a -DBWX_USABLE -DBWIO_ENABLED" + * simple-compile-command: "gcc -DMODULE -O6 -c yellowfin.c" + * c-indent-level: 4 + * c-basic-offset: 4 + * tab-width: 4 + * End: + */ |