/* rtl8139.c: A RealTek RTL8129/8139 Fast Ethernet driver for Linux. */ /* Written 1997 by Donald Becker. This software may be used and distributed according to the terms of the GNU Public License, incorporated herein by reference. All other rights reserved. This driver is for boards based on the RTL8129 and RTL8139 PCI ethernet chips. The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O Center of Excellence in Space Data and Information Sciences Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771 Support and updates available at http://cesdis.gsfc.nasa.gov/linux/drivers/rtl8139.html */ static const char *version = "rtl8139.c:v0.13 10/27/97 Donald Becker http://cesdis.gsfc.nasa.gov/linux/drivers/rtl8139.html\n"; /* A few user-configurable values. */ /* Maximum events (Rx packets, etc.) to handle at each interrupt. */ static int max_interrupt_work = 10; /* Size of the in-memory receive ring. */ #define RX_BUF_LEN_IDX 3 /* 0==8K, 1==16K, 2==32K, 3==64K */ #define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX) /* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */ #define TX_BUF_SIZE 1536 /* PCI Tuning Parameters Threshold is bytes transferred to chip before transmission starts. */ #define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */ /* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024. */ #define RX_FIFO_THRESH 4 /* Rx buffer level before first PCI xfer. */ #define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 bytes */ #define TX_DMA_BURST 4 /* Operational parameters that usually are not changed. */ /* Time in jiffies before concluding the transmitter is hung. */ #define TX_TIMEOUT ((2000*HZ)/1000) #include #ifdef MODULE #ifdef MODVERSIONS #include #endif #include #include #else #define MOD_INC_USE_COUNT #define MOD_DEC_USE_COUNT #endif #include #include #include #include #include #include #include #include #include #include #include #include /* Processor type for cache alignment. */ #include #include #include #include #include #include /* Kernel compatibility defines, common to David Hind's PCMCIA package. This is only in the support-all-kernels source code. */ #include /* Evil, but neccessary */ #if defined (LINUX_VERSION_CODE) && LINUX_VERSION_CODE < 0x10300 #define RUN_AT(x) (x) /* What to put in timer->expires. */ #define DEV_ALLOC_SKB(len) alloc_skb(len, GFP_ATOMIC) #define virt_to_bus(addr) ((unsigned long)addr) #define bus_to_virt(addr) ((void*)addr) #else /* 1.3.0 and later */ #define RUN_AT(x) (jiffies + (x)) #define DEV_ALLOC_SKB(len) dev_alloc_skb(len + 2) #endif #if defined (LINUX_VERSION_CODE) && LINUX_VERSION_CODE < 0x10338 #ifdef MODULE #if !defined(CONFIG_MODVERSIONS) && !defined(__NO_VERSION__) char kernel_version[] = UTS_RELEASE; #endif #else #undef MOD_INC_USE_COUNT #define MOD_INC_USE_COUNT #undef MOD_DEC_USE_COUNT #define MOD_DEC_USE_COUNT #endif #endif /* 1.3.38 */ #if (LINUX_VERSION_CODE >= 0x10344) #define NEW_MULTICAST #include #endif #ifdef SA_SHIRQ #define FREE_IRQ(irqnum, dev) free_irq(irqnum, dev) #define REQUEST_IRQ(i,h,f,n, instance) request_irq(i,h,f,n, instance) #define IRQ(irq, dev_id, pt_regs) (irq, dev_id, pt_regs) #else #define FREE_IRQ(irqnum, dev) free_irq(irqnum) #define REQUEST_IRQ(i,h,f,n, instance) request_irq(i,h,f,n) #define IRQ(irq, dev_id, pt_regs) (irq, pt_regs) #endif #if (LINUX_VERSION_CODE < 0x20123) #define test_and_set_bit(val, addr) set_bit(val, addr) #endif /* The I/O extent. */ #define RTL8129_TOTAL_SIZE 0x80 #ifdef HAVE_DEVLIST struct netdev_entry rtl8139_drv = {"RTL8139", rtl8139_probe, RTL8129_TOTAL_SIZE, NULL}; #endif static int rtl8129_debug = 1; /* Theory of Operation I. Board Compatibility This device driver is designed for the RealTek RTL8129, the RealTek Fast Ethernet controllers for PCI. This chip is used on a few clone 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. Rx Ring buffers The receive unit uses a single linear ring buffer rather than the more common (and more efficient) descriptor-based architecture. Incoming frames are sequentially stored into the Rx region, and the host copies them into skbuffs. Comment: While it is theoretically possible to process many frames in place, any delay in Rx processing would cause us to drop frames. More importantly, the Linux protocol stack is not designed to operate in this manner. IIIb. Tx operation The RTL8129 uses a fixed set of four Tx descriptors in register space. In a stunningly bad design choice, Tx frames must be 32 bit aligned. Linux aligns the IP header on word boundaries, and 14 byte ethernet header means that almost all frames will need to be copied to an alignment buffer. IVb. References http://www.realtek.com.tw/cn/cn.html http://cesdis.gsfc.nasa.gov/linux/misc/NWay.html IVc. Errata */ #ifndef PCI_VENDOR_ID_REALTEK #define PCI_VENDOR_ID_REALTEK 0x10ec #endif #ifndef PCI_DEVICE_ID_REALTEK_8129 #define PCI_DEVICE_ID_REALTEK_8129 0x8129 #endif #ifndef PCI_DEVICE_ID_REALTEK_8139 #define PCI_DEVICE_ID_REALTEK_8139 0x8139 #endif /* The rest of these values should never change. */ #define NUM_TX_DESC 4 /* Number of Tx descriptor registers. */ /* Symbolic offsets to registers. */ enum RTL8129_registers { MAC0=0, /* Ethernet hardware address. */ MAR0=8, /* Multicast filter. */ TxStat0=0x10, /* Transmit status (Four 32bit registers). */ TxAddr0=0x20, /* Tx descriptors (also four 32bit). */ RxBuf=0x30, RxEarlyCnt=0x34, RxEarlyStatus=0x36, ChipCmd=0x37, RxBufPtr=0x38, RxBufAddr=0x3A, IntrMask=0x3C, IntrStatus=0x3E, TxConfig=0x40, RxConfig=0x44, Timer=0x48, /* A general-purpose counter. */ RxMissed=0x4C, /* 24 bits valid, write clears. */ Cfg9346=0x50, Config0=0x51, Config1=0x52, FlashReg=0x54, GPPinData=0x58, GPPinDir=0x59, MII_SMI=0x5A, HltClk=0x5B, MultiIntr=0x5C, TxSummary=0x60, BMCR=0x62, BMSR=0x64, NWayAdvert=0x66, NWayLPAR=0x68, NWayExpansion=0x6A, }; enum ChipCmdBits { CmdReset=0x10, CmdRxEnb=0x08, CmdTxEnb=0x04, RxBufEmpty=0x01, }; /* Interrupt register bits, using my own meaningful names. */ enum IntrStatusBits { PCIErr=0x8000, PCSTimeout=0x4000, RxFIFOOver=0x40, RxUnderrun=0x20, RxOverflow=0x10, TxErr=0x08, TxOK=0x04, RxErr=0x02, RxOK=0x01, }; enum TxStatusBits { TxHostOwns=0x2000, TxUnderrun=0x4000, TxStatOK=0x8000, TxOutOfWindow=0x20000000, TxAborted=0x40000000, TxCarrierLost=0x80000000, }; enum RxStatusBits { RxMulticast=0x8000, RxPhysical=0x4000, RxBroadcast=0x2000, RxBadSymbol=0x0020, RxRunt=0x0010, RxTooLong=0x0008, RxCRCErr=0x0004, RxBadAlign=0x0002, RxStatusOK=0x0001, }; struct rtl8129_private { char devname[8]; /* Used only for kernel debugging. */ const char *product_name; struct device *next_module; int chip_id; int chip_revision; struct enet_statistics stats; struct timer_list timer; /* Media selection timer. */ unsigned int cur_rx, cur_tx; /* The next free and used entries */ unsigned int dirty_rx, dirty_tx; /* The saved address of a sent-in-place packet/buffer, for skfree(). */ struct sk_buff* tx_skbuff[NUM_TX_DESC]; unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */ unsigned char *rx_ring; unsigned char *tx_bufs; /* Tx bounce buffer region. */ unsigned char mc_filter[8]; /* Current multicast filter. */ char phys[4]; /* MII device addresses. */ unsigned int tx_full:1; /* The Tx queue is full. */ unsigned int full_duplex:1; /* Full-duplex operation requested. */ unsigned int default_port:4; /* Last dev->if_port value. */ unsigned int media2:4; /* Secondary monitored media port. */ unsigned int medialock:1; /* Don't sense media type. */ unsigned int mediasense:1; /* Media sensing in progress. */ }; #ifdef MODULE /* Used to pass the full-duplex flag, etc. */ static int options[] = {-1, -1, -1, -1, -1, -1, -1, -1}; static int full_duplex[] = {-1, -1, -1, -1, -1, -1, -1, -1}; #if LINUX_VERSION_CODE > 0x20118 MODULE_AUTHOR("Donald Becker "); MODULE_DESCRIPTION("RealTek RTL8129/8139 Fast Ethernet driver"); MODULE_PARM(debug, "i"); MODULE_PARM(options, "1-" __MODULE_STRING(8) "i"); MODULE_PARM(full_duplex, "1-" __MODULE_STRING(8) "i"); MODULE_PARM(max_interrupt_work, "i"); #endif #endif static struct device *rtl8129_probe1(struct device *dev, int ioaddr, int irq, int chip_id, int options, int card_idx); static int rtl8129_open(struct device *dev); static int read_eeprom(int ioaddr, int location); static int mdio_read(int ioaddr, int phy_id, int location); static void rtl8129_timer(unsigned long data); static void rtl8129_tx_timeout(struct device *dev); static void rtl8129_init_ring(struct device *dev); static int rtl8129_start_xmit(struct sk_buff *skb, struct device *dev); static int rtl8129_rx(struct device *dev); static void rtl8129_interrupt(int irq, void *dev_instance, struct pt_regs *regs); static int rtl8129_close(struct device *dev); static struct enet_statistics *rtl8129_get_stats(struct device *dev); #ifdef NEW_MULTICAST static void set_rx_mode(struct device *dev); #else static void set_rx_mode(struct device *dev, int num_addrs, void *addrs); #endif #ifdef MODULE /* A list of all installed RTL8129 devices, for removing the driver module. */ static struct device *root_rtl8129_dev = NULL; #endif int rtl8139_probe(struct device *dev) { int cards_found = 0; static int pci_index = 0; /* Static, for multiple probe calls. */ /* Ideally we would detect all network cards in slot order. That would be best done a central PCI probe dispatch, which wouldn't work well with the current structure. So instead we detect just the Rtl81*9 cards in slot order. */ if (pcibios_present()) { unsigned char pci_bus, pci_device_fn; for (;pci_index < 0xff; pci_index++) { unsigned char pci_irq_line, pci_latency; unsigned short pci_command, vendor, device; unsigned int pci_ioaddr; if (pcibios_find_class (PCI_CLASS_NETWORK_ETHERNET << 8, #ifdef REVERSE_PROBE_ORDER 0xff - pci_index, #else pci_index, #endif &pci_bus, &pci_device_fn) != PCIBIOS_SUCCESSFUL) break; pcibios_read_config_word(pci_bus, pci_device_fn, PCI_VENDOR_ID, &vendor); if (vendor != PCI_VENDOR_ID_REALTEK) continue; pcibios_read_config_word(pci_bus, pci_device_fn, PCI_DEVICE_ID, &device); pcibios_read_config_byte(pci_bus, pci_device_fn, PCI_INTERRUPT_LINE, &pci_irq_line); pcibios_read_config_dword(pci_bus, pci_device_fn, PCI_BASE_ADDRESS_0, &pci_ioaddr); /* Remove I/O space marker in bit 0. */ pci_ioaddr &= ~3; if (device != PCI_DEVICE_ID_REALTEK_8129 && device != PCI_DEVICE_ID_REALTEK_8139) { printk("Unknown RealTek PCI ethernet chip type %4.4x detected:" " not configured.\n", device); continue; } if (check_region(pci_ioaddr, RTL8129_TOTAL_SIZE)) continue; #ifdef MODULE dev = rtl8129_probe1(dev, pci_ioaddr, pci_irq_line, device, options[cards_found], cards_found); #else dev = rtl8129_probe1(dev, pci_ioaddr, pci_irq_line, device, dev ? dev->mem_start : 0, -1); #endif if (dev) { /* Get and check the bus-master and latency values. */ pcibios_read_config_word(pci_bus, pci_device_fn, PCI_COMMAND, &pci_command); if ( ! (pci_command & PCI_COMMAND_MASTER)) { printk(" PCI Master Bit has not been set! Setting...\n"); pci_command |= PCI_COMMAND_MASTER; pcibios_write_config_word(pci_bus, pci_device_fn, PCI_COMMAND, pci_command); } pcibios_read_config_byte(pci_bus, pci_device_fn, PCI_LATENCY_TIMER, &pci_latency); if (pci_latency < 10) { printk(" PCI latency timer (CFLT) is unreasonably low " "at %d. Setting to 64 clocks.\n", pci_latency); pcibios_write_config_byte(pci_bus, pci_device_fn, PCI_LATENCY_TIMER, 64); } else if (rtl8129_debug > 1) printk(" PCI latency timer (CFLT) is %#x.\n", pci_latency); dev = 0; cards_found++; } } } #if defined (MODULE) return cards_found; #else return cards_found ? 0 : -ENODEV; #endif } static struct device *rtl8129_probe1(struct device *dev, int ioaddr, int irq, int chip_id, int options, int card_idx) { static int did_version = 0; /* Already printed version info. */ struct rtl8129_private *tp; int i; if (rtl8129_debug > 0 && did_version++ == 0) printk(version); dev = init_etherdev(dev, 0); printk("%s: RealTek RTL%x at %#3x, IRQ %d, ", dev->name, chip_id, ioaddr, irq); /* Bring the chip out of low-power mode. */ outb(0x00, ioaddr + Config1); /* Perhaps this should be read from the EEPROM? */ for (i = 0; i < 6; i++) dev->dev_addr[i] = inb(ioaddr + MAC0 + i); for (i = 0; i < 5; i++) printk("%2.2x:", dev->dev_addr[i]); printk("%2.2x.\n", dev->dev_addr[i]); if (rtl8129_debug > 1) { printk("%s: EEPROM contents\n", dev->name); for (i = 0; i < 64; i++) printk(" %4.4x%s", read_eeprom(ioaddr, i), i%16 == 15 ? "\n" : ""); } /* We do a request_region() to register /proc/ioports info. */ request_region(ioaddr, RTL8129_TOTAL_SIZE, "RealTek RTL8129/39 Fast Ethernet"); dev->base_addr = ioaddr; dev->irq = irq; /* Some data structures must be quadword aligned. */ tp = kmalloc(sizeof(*tp), GFP_KERNEL | GFP_DMA); memset(tp, 0, sizeof(*tp)); dev->priv = tp; #ifdef MODULE tp->next_module = root_rtl8129_dev; root_rtl8129_dev = dev; #endif tp->chip_id = chip_id; /* Find the connected MII xcvrs. Doing this in open() would allow detecting external xcvrs later, but takes too much time. */ if (chip_id == 0x8129) { int phy, phy_idx; for (phy = 0, phy_idx = 0; phy < 32 && phy_idx < sizeof(tp->phys); phy++) { int mii_status = mdio_read(ioaddr, phy, 1); if (mii_status != 0xffff && mii_status != 0x0000) { tp->phys[phy_idx++] = phy; printk("%s: MII transceiver found at address %d.\n", dev->name, phy); } } if (phy_idx == 0) { printk("%s: No MII transceivers found! Assuming SYM transceiver.\n", dev->name); tp->phys[0] = -1; } } else { tp->phys[0] = -1; } /* Put the chip into low-power mode. */ outb(0xC0, ioaddr + Cfg9346); outb(0x03, ioaddr + Config1); outb('H', ioaddr + HltClk); /* 'R' would leave the clock running. */ /* The lower four bits are the media type. */ if (options > 0) { tp->full_duplex = (options & 16) ? 1 : 0; tp->default_port = options & 15; if (tp->default_port) tp->medialock = 1; } #ifdef MODULE if (card_idx >= 0) { if (full_duplex[card_idx] >= 0) tp->full_duplex = full_duplex[card_idx]; } #endif /* The Rtl8129-specific entries in the device structure. */ dev->open = &rtl8129_open; dev->hard_start_xmit = &rtl8129_start_xmit; dev->stop = &rtl8129_close; dev->get_stats = &rtl8129_get_stats; dev->set_multicast_list = &set_rx_mode; return dev; } /* Serial EEPROM section. */ /* EEPROM_Ctrl bits. */ #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */ #define EE_CS 0x08 /* EEPROM chip select. */ #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */ #define EE_WRITE_0 0x00 #define EE_WRITE_1 0x02 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */ #define EE_ENB (0x80 | EE_CS) /* Delay between EEPROM clock transitions. The 1.2 code is a "nasty" timing loop, but PC compatible machines are *supposed* to delay an ISA-compatible period for the SLOW_DOWN_IO macro. */ #ifdef _LINUX_DELAY_H #define eeprom_delay(nanosec) udelay((nanosec + 999)/1000) #else #define eeprom_delay(nanosec) do { int _i = 3; while (--_i > 0) { __SLOW_DOWN_IO; }} while (0) #endif /* The EEPROM commands include the alway-set leading bit. */ #define EE_WRITE_CMD (5 << 6) #define EE_READ_CMD (6 << 6) #define EE_ERASE_CMD (7 << 6) static int read_eeprom(int ioaddr, int location) { int i; unsigned short retval = 0; short ee_addr = ioaddr + Cfg9346; int read_cmd = location | EE_READ_CMD; outb(EE_ENB & ~EE_CS, ee_addr); outb(EE_ENB, ee_addr); /* Shift the read command bits out. */ for (i = 10; i >= 0; i--) { short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0; outb(EE_ENB | dataval, ee_addr); eeprom_delay(100); outb(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr); eeprom_delay(150); outb(EE_ENB | dataval, ee_addr); /* Finish EEPROM a clock tick. */ eeprom_delay(250); } outb(EE_ENB, ee_addr); for (i = 16; i > 0; i--) { outb(EE_ENB | EE_SHIFT_CLK, ee_addr); eeprom_delay(100); retval = (retval << 1) | ((inb(ee_addr) & EE_DATA_READ) ? 1 : 0); outb(EE_ENB, ee_addr); eeprom_delay(100); } /* Terminate the EEPROM access. */ outb(~EE_CS, ee_addr); return retval; } /* MII serial management: mostly bogus for now. */ /* Read and write the MII management registers using software-generated serial MDIO protocol. The maxium data clock rate is 2.5 Mhz. */ #define MDIO_DIR 0x80 #define MDIO_DATA_OUT 0x04 #define MDIO_DATA_IN 0x02 #define MDIO_CLK 0x01 #ifdef _LINUX_DELAY_H #define mdio_delay() udelay(1) /* Really 400ns. */ #else #define mdio_delay() __SLOW_DOWN_IO; #endif /* Syncronize the MII management interface by shifting 32 one bits out. */ static void mdio_sync(int ioaddr) { int i; int mdio_addr = ioaddr + MII_SMI; for (i = 32; i >= 0; i--) { outb(MDIO_DIR | MDIO_DATA_OUT, mdio_addr); mdio_delay(); outb(MDIO_DIR | MDIO_DATA_OUT | MDIO_CLK, mdio_addr); mdio_delay(); } return; } static int mdio_read(int ioaddr, int phy_id, int location) { int i; int read_cmd = (0xf6 << 10) | (phy_id << 5) | location; int retval = 0; int mdio_addr = ioaddr + MII_SMI; mdio_sync(ioaddr); /* Shift the read command bits out. */ for (i = 15; i >= 0; i--) { int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_OUT : 0; outb(MDIO_DIR | dataval, mdio_addr); mdio_delay(); outb(MDIO_DIR | dataval | MDIO_CLK, mdio_addr); mdio_delay(); } /* Read the two transition, 16 data, and wire-idle bits. */ for (i = 19; i > 0; i--) { outb(0, mdio_addr); mdio_delay(); retval = (retval << 1) | ((inb(mdio_addr) & MDIO_DATA_IN) ? 1 : 0); outb(MDIO_CLK, mdio_addr); mdio_delay(); } return (retval>>1) & 0xffff; } static int rtl8129_open(struct device *dev) { struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; int ioaddr = dev->base_addr; int i; int full_duplex = 0; /* Soft reset the chip. */ outb(CmdReset, ioaddr + ChipCmd); #ifdef SA_SHIRQ if (request_irq(dev->irq, &rtl8129_interrupt, SA_SHIRQ, "RealTek RTL8129/39 Fast Ethernet", dev)) { return -EAGAIN; } #else if (irq2dev_map[dev->irq] != NULL || (irq2dev_map[dev->irq] = dev) == NULL || dev->irq == 0 || request_irq(dev->irq, &rtl8129_interrupt, 0, "RTL8129")) { return -EAGAIN; } #endif MOD_INC_USE_COUNT; tp->tx_bufs = kmalloc(TX_BUF_SIZE * NUM_TX_DESC, GFP_KERNEL); tp->rx_ring = kmalloc(RX_BUF_LEN + 16, GFP_KERNEL); if (tp->tx_bufs == NULL || tp->rx_ring == NULL) { if (tp->tx_bufs) kfree(tp->tx_bufs); if (rtl8129_debug > 0) printk("%s: Couldn't allocate a %d byte receive ring.\n", dev->name, RX_BUF_LEN); return -ENOMEM; } rtl8129_init_ring(dev); #ifndef final_version /* Used to monitor rx ring overflow. */ memset(tp->rx_ring + RX_BUF_LEN, 0xcc, 16); #endif /* Check that the chip has finished the reset. */ for (i = 1000; i > 0; i--) if ((inb(ioaddr + ChipCmd) & CmdReset) == 0) break; #ifndef final_version if (rtl8129_debug > 2) printk("%s: reset finished with status %2.2x after %d loops.\n", dev->name, inb(ioaddr + ChipCmd), 1000-i); #endif for (i = 0; i < 6; i++) outb(dev->dev_addr[i], ioaddr + MAC0 + i); /* Must enable Tx/Rx before setting transfer thresholds! */ outb(CmdRxEnb | CmdTxEnb, ioaddr + ChipCmd); outl((RX_FIFO_THRESH << 13) | (RX_BUF_LEN_IDX << 11) | (RX_DMA_BURST<<8), ioaddr + RxConfig); outl((TX_DMA_BURST<<8), ioaddr + TxConfig); full_duplex = tp->full_duplex; if (tp->phys[0] >= 0 || tp->chip_id == 0x8139) { u16 mii_reg5; if (tp->chip_id == 0x8139) mii_reg5 = inw(ioaddr + NWayLPAR); else mii_reg5 = mdio_read(ioaddr, tp->phys[0], 5); if (mii_reg5 == 0xffff) ; /* Not there */ else if ((mii_reg5 & 0x0100) == 0x0100 || (mii_reg5 & 0x00C0) == 0x0040) full_duplex = 1; if (rtl8129_debug > 1) printk("%s: Setting %s%s-duplex based on" " auto-negotiated partner ability %4.4x.\n", dev->name, mii_reg5 == 0 ? "" : (mii_reg5 & 0x0180) ? "100mbps " : "10mbps ", full_duplex ? "full" : "half", mii_reg5); } outb(0xC0, ioaddr + Cfg9346); outb(full_duplex ? 0x60 : 0x20, ioaddr + Config1); outb(0x00, ioaddr + Cfg9346); outl(virt_to_bus(tp->rx_ring), ioaddr + RxBuf); /* Start the chip's Tx and Rx process. */ outl(0, ioaddr + RxMissed); set_rx_mode(dev); outb(CmdRxEnb | CmdTxEnb, ioaddr + ChipCmd); #ifndef final_version if (rtl8129_debug > 1) printk("%s: In rtl8129_open() Tx/Rx Config %8.8x/%8.8x" " Chip Config %2.2x/%2.2x.\n", dev->name, inl(ioaddr + TxConfig), inl(ioaddr + RxConfig), inb(ioaddr + Config0), inb(ioaddr + Config1)); #endif dev->tbusy = 0; dev->interrupt = 0; dev->start = 1; /* Enable all known interrupts by setting the interrupt mask. */ outw(PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver | TxErr | TxOK | RxErr | RxOK, ioaddr + IntrMask); if (rtl8129_debug > 1) printk("%s: rtl8129_open() ioaddr %4.4x IRQ %d GP Pins %2.2x %s-duplex.\n", dev->name, ioaddr, dev->irq, inb(ioaddr + GPPinData), full_duplex ? "full" : "half"); /* Set the timer to switch to check for link beat and perhaps switch to an alternate media type. */ init_timer(&tp->timer); tp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */ tp->timer.data = (unsigned long)dev; tp->timer.function = &rtl8129_timer; /* timer handler */ add_timer(&tp->timer); return 0; } static void rtl8129_timer(unsigned long data) { struct device *dev = (struct device *)data; struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; int ioaddr = dev->base_addr; int next_tick = 0; if (tp->chip_id == 0x8139) { u16 mii_reg5 = inw(ioaddr + NWayLPAR); if ((mii_reg5 & 0x0100) == 0x0100 || (mii_reg5 & 0x00C0) == 0x0040) if ( ! tp->full_duplex) { tp->full_duplex = 1; if (rtl8129_debug > 0) printk("%s: Switching to full-duplex based on link " "partner ability of %4.4x.\n", dev->name, mii_reg5); outb(0xC0, ioaddr + Cfg9346); outb(full_duplex ? 0x60 : 0x20, ioaddr + Config1); outb(0x00, ioaddr + Cfg9346); } } if (rtl8129_debug > 2) { if (tp->chip_id == 0x8129) printk("%s: Media selection tick, general purpose pins %2.2x.\n", dev->name, inb(ioaddr + GPPinData)); else printk("%s: Media selection tick, Link partner %4.4x.\n", dev->name, inw(ioaddr + NWayLPAR)); printk("%s: Other registers are IntMask %4.4x IntStatus %4.4x" " RxStatus %4.4x.\n", dev->name, inw(ioaddr + IntrMask), inw(ioaddr + IntrStatus), inl(ioaddr + RxEarlyStatus)); printk("%s: Chip config %2.2x %2.2x.\n", dev->name, inb(ioaddr + Config0), inb(ioaddr + Config1)); } if (next_tick) { tp->timer.expires = RUN_AT(next_tick); add_timer(&tp->timer); } } static void rtl8129_tx_timeout(struct device *dev) { struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; int ioaddr = dev->base_addr; int i; if (rtl8129_debug > 1) printk("%s: Transmit timeout using MII device.\n", dev->name); for (i = 0; i < NUM_TX_DESC; i++) printk("%s: Tx descriptor %d is %8.8x.%s\n", dev->name, i, inl(ioaddr + TxStat0), i == tp->dirty_tx ? " (queue head)" : ""); /* Perhaps stop and restart the chip's Tx processes . */ /* Todo: We should figure out what went wrong. */ dev->trans_start = jiffies; tp->stats.tx_errors++; return; } /* Initialize the Rx and Tx rings, along with various 'dev' bits. */ static void rtl8129_init_ring(struct device *dev) { struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; int i; tp->tx_full = 0; tp->cur_rx = tp->cur_tx = 0; tp->dirty_rx = tp->dirty_tx = 0; for (i = 0; i < NUM_TX_DESC; i++) { tp->tx_skbuff[i] = 0; tp->tx_buf[i] = &tp->tx_bufs[i*TX_BUF_SIZE]; } } static int rtl8129_start_xmit(struct sk_buff *skb, struct device *dev) { struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; int ioaddr = dev->base_addr; int entry; #ifndef final_version if (skb == NULL || skb->len <= 0) { printk("%s: Obsolete driver layer request made: skbuff==NULL.\n", dev->name); dev_tint(dev); return 0; } #endif /* Block a timer-based transmit from overlapping. This could better be done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */ if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) { if (jiffies - dev->trans_start < TX_TIMEOUT) return 1; rtl8129_tx_timeout(dev); return 1; } /* Calculate the next Tx descriptor entry. */ entry = tp->cur_tx % NUM_TX_DESC; tp->tx_skbuff[entry] = skb; if ((long)skb->data & 3) { /* Must use alignment buffer. */ memcpy(tp->tx_buf[entry], skb->data, skb->len); outl(virt_to_bus(tp->tx_buf[entry]), ioaddr + TxAddr0 + entry*4); } else outl(virt_to_bus(skb->data), ioaddr + TxAddr0 + entry*4); /* Note: the chip doesn't have auto-pad! */ outl(((TX_FIFO_THRESH<<11) & 0x003f0000) | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN), ioaddr + TxStat0 + entry*4); if (++tp->cur_tx - tp->dirty_tx < NUM_TX_DESC) {/* Typical path */ dev->tbusy = 0; } else { tp->tx_full = 1; } dev->trans_start = jiffies; if (rtl8129_debug > 4) printk("%s: Queued Tx packet at %p size %ld to slot %d.\n", dev->name, skb->data, skb->len, entry); return 0; } /* The interrupt handler does all of the Rx thread work and cleans up after the Tx thread. */ static void rtl8129_interrupt IRQ(int irq, void *dev_instance, struct pt_regs *regs) { #ifdef SA_SHIRQ struct device *dev = (struct device *)dev_instance; #else struct device *dev = (struct device *)(irq2dev_map[irq]); #endif struct rtl8129_private *tp; int ioaddr, boguscnt = max_interrupt_work; int status; if (dev == NULL) { printk ("rtl8129_interrupt(): irq %d for unknown device.\n", irq); return; } ioaddr = dev->base_addr; tp = (struct rtl8129_private *)dev->priv; if (dev->interrupt) printk("%s: Re-entering the interrupt handler.\n", dev->name); dev->interrupt = 1; do { status = inw(ioaddr + IntrStatus); /* Acknowledge all of the current interrupt sources ASAP. */ outw(status, ioaddr + IntrStatus); if (rtl8129_debug > 4) printk("%s: interrupt status=%#4.4x new intstat=%#4.4x.\n", dev->name, status, inw(ioaddr + IntrStatus)); if ((status & (PCIErr|PCSTimeout|RxUnderrun|RxOverflow|RxFIFOOver |TxErr|TxOK|RxErr|RxOK)) == 0) break; if (status & (RxOK|RxUnderrun|RxOverflow|RxFIFOOver))/* Rx interrupt */ rtl8129_rx(dev); if (status & (TxOK | TxErr)) { int dirty_tx; for (dirty_tx = tp->dirty_tx; dirty_tx < tp->cur_tx; dirty_tx++) { int entry = dirty_tx % NUM_TX_DESC; int txstatus = inl(ioaddr + TxStat0 + entry*4); if ( ! (txstatus & TxHostOwns)) break; /* It still hasn't been Txed */ /* Note: TxCarrierLost is always asserted at 100mbps. */ if (txstatus & (TxOutOfWindow | TxAborted)) { /* There was an major error, log it. */ #ifndef final_version if (rtl8129_debug > 1) printk("%s: Transmit error, Tx status %8.8x.\n", dev->name, txstatus); #endif tp->stats.tx_errors++; if (txstatus&TxAborted) tp->stats.tx_aborted_errors++; if (txstatus&TxCarrierLost) tp->stats.tx_carrier_errors++; if (txstatus&TxOutOfWindow) tp->stats.tx_window_errors++; #ifdef ETHER_STATS if ((txstatus & 0x0f000000) == 0x0f000000) tp->stats.collisions16++; #endif } else { #ifdef ETHER_STATS /* No count for tp->stats.tx_deferred */ #endif if (txstatus & TxUnderrun) { /* Todo: increase the Tx FIFO threshold. */ tp->stats.tx_fifo_errors++; } tp->stats.collisions += (txstatus >> 24) & 15; tp->stats.tx_packets++; } /* Free the original skb. */ dev_kfree_skb(tp->tx_skbuff[entry], FREE_WRITE); tp->tx_skbuff[entry] = 0; } #ifndef final_version if (tp->cur_tx - dirty_tx > NUM_TX_DESC) { printk("%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n", dev->name, dirty_tx, tp->cur_tx, tp->tx_full); dirty_tx += NUM_TX_DESC; } #endif if (tp->tx_full && dev->tbusy && dirty_tx > tp->cur_tx - NUM_TX_DESC) { /* The ring is no longer full, clear tbusy. */ tp->tx_full = 0; dev->tbusy = 0; mark_bh(NET_BH); } tp->dirty_tx = dirty_tx; } /* Check uncommon events with one test. */ if (status & (PCIErr|PCSTimeout |RxUnderrun|RxOverflow|RxFIFOOver |TxErr|RxErr)) { /* Update the error count. */ tp->stats.rx_missed_errors += inl(ioaddr + RxMissed); outl(0, ioaddr + RxMissed); if (status & (RxUnderrun | RxOverflow | RxErr | RxFIFOOver)) tp->stats.rx_errors++; if (status & (PCSTimeout)) tp->stats.rx_length_errors++; if (status & (RxUnderrun|RxFIFOOver)) tp->stats.rx_fifo_errors++; if (status & RxOverflow) { tp->stats.rx_over_errors++; tp->cur_rx = inw(ioaddr + RxBufAddr) % RX_BUF_LEN; outw(tp->cur_rx - 16, ioaddr + RxBufPtr); } /* Error sources cleared above. */ } if (--boguscnt < 0) { printk("%s: Too much work at interrupt, IntrStatus=0x%4.4x.\n", dev->name, status); /* Clear all interrupt sources. */ outw(0xffff, ioaddr + IntrStatus); break; } } while (1); if (rtl8129_debug > 3) printk("%s: exiting interrupt, intr_status=%#4.4x.\n", dev->name, inl(ioaddr + IntrStatus)); /* Code that should never be run! Perhaps remove after testing.. */ { static int stopit = 10; if (dev->start == 0 && --stopit < 0) { printk("%s: Emergency stop, looping startup interrupt.\n", dev->name); FREE_IRQ(irq, dev); } } dev->interrupt = 0; return; } /* Todo: The data sheet doesn't describe the Rx ring at all, so I'm winging it here until I have a chip to play with. 8/30/97 */ static int rtl8129_rx(struct device *dev) { struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; int ioaddr = dev->base_addr; unsigned char *rx_ring = tp->rx_ring; u16 cur_rx = tp->cur_rx; if (rtl8129_debug > 4) printk("%s: In rtl8129_rx(), current %4.4x BufAddr %4.4x," " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx, inw(ioaddr + RxBufAddr), inw(ioaddr + RxBufPtr), inb(ioaddr + ChipCmd)); while ((inb(ioaddr + ChipCmd) & 1) == 0) { u16 ring_offset = cur_rx % RX_BUF_LEN; u32 rx_status = *(u32*)(rx_ring + ring_offset); u16 rx_size = rx_status >> 16; if (rtl8129_debug > 4) { int i; printk("%s: rtl8129_rx() status %4.4x, size %4.4x, cur %4.4x.\n", dev->name, rx_status, rx_size, cur_rx); printk("%s: Frame contents ", dev->name); for (i = 0; i < 70; i++) printk(" %2.2x", rx_ring[ring_offset + i]); printk(".\n"); } if (rx_status & RxTooLong) { if (rtl8129_debug > 0) printk("%s: Oversized Ethernet frame, status %4.4x!\n", dev->name, rx_status); tp->stats.rx_length_errors++; } else if (rx_status & (RxBadSymbol|RxRunt|RxTooLong|RxCRCErr|RxBadAlign)) { if (rtl8129_debug > 1) printk("%s: Ethernet frame had errors," " status %4.4x.\n", dev->name, rx_status); tp->stats.rx_errors++; if (rx_status & (RxBadSymbol|RxBadAlign)) tp->stats.rx_frame_errors++; if (rx_status & (RxRunt|RxTooLong)) tp->stats.rx_length_errors++; if (rx_status & RxCRCErr) tp->stats.rx_crc_errors++; } else { /* Malloc up new buffer, compatible with net-2e. */ /* Omit the four octet CRC from the length. */ struct sk_buff *skb; skb = DEV_ALLOC_SKB(rx_size + 2); if (skb == NULL) { printk("%s: Memory squeeze, deferring packet.\n", dev->name); /* We should check that some rx space is free. If not, free one and mark stats->rx_dropped++. */ tp->stats.rx_dropped++; break; } skb->dev = dev; skb_reserve(skb, 2); /* 16 byte align the IP fields. */ if (ring_offset+rx_size+4 > RX_BUF_LEN) { int semi_count = RX_BUF_LEN - ring_offset - 4; memcpy(skb_put(skb, semi_count), &rx_ring[ring_offset + 4], semi_count); memcpy(skb_put(skb, rx_size-semi_count), rx_ring, rx_size-semi_count); if (rtl8129_debug > 4) { int i; printk("%s: Frame wrap @%d", dev->name, semi_count); for (i = 0; i < 16; i++) printk(" %2.2x", rx_ring[i]); printk(".\n"); memset(rx_ring, 0xcc, 16); } } else memcpy(skb_put(skb, rx_size), &rx_ring[ring_offset + 4], rx_size); #if LINUX_VERSION_CODE >= 0x10300 skb->protocol = eth_type_trans(skb, dev); #else skb->len = rx_size; #endif netif_rx(skb); tp->stats.rx_packets++; } cur_rx += rx_size + 4; cur_rx = (cur_rx + 3) & ~3; outw(cur_rx - 16, ioaddr + RxBufPtr); } if (rtl8129_debug > 4) printk("%s: Done rtl8129_rx(), current %4.4x BufAddr %4.4x," " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx, inw(ioaddr + RxBufAddr), inw(ioaddr + RxBufPtr), inb(ioaddr + ChipCmd)); tp->cur_rx = cur_rx; return 0; } static int rtl8129_close(struct device *dev) { int ioaddr = dev->base_addr; struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; int i; dev->start = 0; dev->tbusy = 1; if (rtl8129_debug > 1) printk("%s: Shutting down ethercard, status was 0x%4.4x.\n", dev->name, inw(ioaddr + IntrStatus)); /* Disable interrupts by clearing the interrupt mask. */ outw(0x0000, ioaddr + IntrMask); /* Stop the chip's Tx and Rx DMA processes. */ outb(0x00, ioaddr + ChipCmd); /* Update the error counts. */ tp->stats.rx_missed_errors += inl(ioaddr + RxMissed); outl(0, ioaddr + RxMissed); del_timer(&tp->timer); #ifdef SA_SHIRQ free_irq(dev->irq, dev); #else free_irq(dev->irq); irq2dev_map[dev->irq] = 0; #endif #ifndef final_version /* Used to monitor rx ring overflow. */ for (i = 0; i < 16; i++) if (tp->rx_ring[RX_BUF_LEN+i] != 0xcc) { printk("%s: Rx ring overflowed! Values are ", dev->name); for (i = 0; i < 16; i++) printk(" %2.2x", tp->rx_ring[RX_BUF_LEN + i]); printk(".\n"); break; } #endif for (i = 0; i < NUM_TX_DESC; i++) { if (tp->tx_skbuff[i]) dev_kfree_skb(tp->tx_skbuff[i], FREE_WRITE); tp->tx_skbuff[i] = 0; } kfree(tp->rx_ring); kfree(tp->tx_bufs); /* Green! Put the chip in low-power mode. */ outb(0xC0, ioaddr + Cfg9346); outb(0x03, ioaddr + Config1); outb('H', ioaddr + HltClk); /* 'R' would leave the clock running. */ MOD_DEC_USE_COUNT; return 0; } static struct enet_statistics * rtl8129_get_stats(struct device *dev) { struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; int ioaddr = dev->base_addr; if (dev->start) { tp->stats.rx_missed_errors += inl(ioaddr + RxMissed); outl(0, ioaddr + RxMissed); } return &tp->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 tp->setup_frame. This is non-deterministic when re-entered but still correct. */ /* The little-endian AUTODIN II ethernet CRC calculation. N.B. Do not use for bulk data, use a table-based routine instead. This is common code and should be moved to net/core/crc.c */ static unsigned const ethernet_polynomial_le = 0xedb88320U; static inline unsigned ether_crc_le(int length, unsigned char *data) { unsigned int crc = 0xffffffff; /* Initial value. */ while(--length >= 0) { unsigned char current_octet = *data++; int bit; for (bit = 8; --bit >= 0; current_octet >>= 1) { if ((crc ^ current_octet) & 1) { crc >>= 1; crc ^= ethernet_polynomial_le; } else crc >>= 1; } } return crc; } static void #ifdef NEW_MULTICAST set_rx_mode(struct device *dev) #else static void set_rx_mode(struct device *dev, int num_addrs, void *addrs); #endif { int ioaddr = dev->base_addr; struct rtl8129_private *tp = (struct rtl8129_private *)dev->priv; unsigned char mc_filter[8]; /* Multicast hash filter */ int i; if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ /* Unconditionally log net taps. */ printk("%s: Promiscuous mode enabled.\n", dev->name); memset(mc_filter, 0xff, sizeof(mc_filter)); outb(0x0F, ioaddr + RxConfig); } else if ((dev->mc_count > 1000) || (dev->flags & IFF_ALLMULTI)) { /* Too many to filter perfectly -- accept all multicasts. */ memset(mc_filter, 0xff, sizeof(mc_filter)); outb(0x0E, ioaddr + RxConfig); } else if (dev->mc_count == 0) { outb(0x0A, ioaddr + RxConfig); return; } else { struct dev_mc_list *mclist; memset(mc_filter, 0, sizeof(mc_filter)); for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; i++, mclist = mclist->next) set_bit(ether_crc_le(ETH_ALEN, mclist->dmi_addr) & 0x3f, mc_filter); } /* ToDo: perhaps we need to stop the Tx and Rx process here? */ if (memcmp(mc_filter, tp->mc_filter, sizeof(mc_filter))) { for (i = 0; i < 2; i++) outl(((u32 *)mc_filter)[i], ioaddr + MAR0 + i*4); memcpy(tp->mc_filter, mc_filter, sizeof(mc_filter)); } if (rtl8129_debug > 3) printk("%s: set_rx_mode(%4.4x) done -- Rx config %8.8x.\n", dev->name, dev->flags, inl(ioaddr + RxConfig)); return; } #ifdef MODULE /* An additional parameter that may be passed in... */ static int debug = -1; int init_module(void) { int cards_found; if (debug >= 0) rtl8129_debug = debug; root_rtl8129_dev = NULL; cards_found = rtl8139_probe(0); return cards_found ? 0 : -ENODEV; } void cleanup_module(void) { struct device *next_dev; /* No need to check MOD_IN_USE, as sys_delete_module() checks. */ while (root_rtl8129_dev) { next_dev = ((struct rtl8129_private *)root_rtl8129_dev->priv)->next_module; unregister_netdev(root_rtl8129_dev); release_region(root_rtl8129_dev->base_addr, RTL8129_TOTAL_SIZE); kfree(root_rtl8129_dev); root_rtl8129_dev = next_dev; } } #endif /* MODULE */ /* * Local variables: * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c rtl8139.c" * c-indent-level: 4 * c-basic-offset: 4 * tab-width: 4 * End: */