patch-2.3.45 linux/drivers/net/8139too.c
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- Lines: 1813
- Date:
Sun Feb 13 10:23:26 2000
- Orig file:
v2.3.44/linux/drivers/net/8139too.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.3.44/linux/drivers/net/8139too.c linux/drivers/net/8139too.c
@@ -0,0 +1,1812 @@
+/*
+
+ 8139too.c: A RealTek RTL-8139 Fast Ethernet driver for Linux.
+
+ Copyright 2000 Jeff Garzik <jgarzik@mandrakesoft.com>
+ Originally: Written 1997-1999 by Donald Becker.
+
+ This software may be used and distributed according to the terms
+ of the GNU Public License, incorporated herein by reference.
+
+ Contributors:
+
+ Donald Becker - he wrote the original driver, kudos to him!
+ (but please don't e-mail him for support, this isn't his driver)
+
+ Tigran Aivazian - bug fixes, skbuff free cleanup
+
+ Martin Mares - suggestions for PCI cleanup
+
+ David S. Miller - PCI DMA and softnet updates
+
+-----------------------------------------------------------------------------
+
+ Theory of Operation
+
+I. Board Compatibility
+
+This device driver is designed for the RealTek RTL8139 series, the RealTek
+Fast Ethernet controllers for PCI and CardBus. This chip is used on many
+low-end boards, sometimes with its markings changed.
+
+
+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.
+
+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 RTL8139 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
+
+1) The RTL-8139 has a serious problem with motherboards which do
+posted MMIO writes to PCI space. This driver works around the
+problem by having an MMIO register write be immediately followed by
+an MMIO register read.
+
+2) The RTL-8129 is only supported in Donald Becker's rtl8139 driver.
+
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <asm/io.h>
+
+
+#define RTL8139_VERSION "0.9.0"
+#define RTL8139_MODULE_NAME "8139too"
+#define RTL8139_DRIVER_NAME RTL8139_MODULE_NAME " Fast Ethernet driver " RTL8139_VERSION
+#define PFX RTL8139_MODULE_NAME ": "
+
+#undef RTL8139_DEBUG /* define to 1 to enable copious debugging info */
+
+#ifdef RTL8139_DEBUG
+/* note: prints function name for you */
+#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+#define RTL8139_NDEBUG 0 /* define to 1 to disable lightweight runtime checks */
+#if RTL8139_NDEBUG
+#define assert(expr)
+#else
+#define assert(expr) \
+ if(!(expr)) { \
+ printk( "Assertion failed! %s,%s,%s,line=%d\n", \
+ #expr,__FILE__,__FUNCTION__,__LINE__); \
+ }
+#endif
+
+#define arraysize(x) (sizeof(x)/sizeof(*(x)))
+
+
+#ifndef PCI_GET_DRIVER_DATA
+ #define PCI_GET_DRIVER_DATA(pdev) ((pdev)->driver_data)
+ #define PCI_SET_DRIVER_DATA(pdev,data) (((pdev)->driver_data) = (data))
+#endif /* PCI_GET_DRIVER_DATA */
+
+
+/* A few user-configurable values. */
+/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
+static int max_interrupt_work = 20;
+
+/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
+ The RTL chips use a 64 element hash table based on the Ethernet CRC. */
+static int multicast_filter_limit = 32;
+
+/* Size of the in-memory receive ring. */
+#define RX_BUF_LEN_IDX 2 /* 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 /* Calculate as 16<<val. */
+
+/* Operational parameters that usually are not changed. */
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT (6*HZ)
+
+
+enum {
+ HAS_CHIP_XCVR = 0x020000,
+ HAS_LNK_CHNG = 0x040000,
+};
+
+#define RTL_IO_SIZE 256
+
+#define RTL8139_CAPS HAS_CHIP_XCVR|HAS_LNK_CHNG
+
+typedef enum {
+ UNKNOWN = 0,
+ RTL8139,
+ RTL8139_CB,
+ SMC1211TX,
+ MPX5030,
+ SIS900,
+ SIS7016,
+} chip_t;
+
+static struct {
+ chip_t chip;
+ const char *name;
+} chip_info[] __devinitdata = {
+ { RTL8139, "RealTek RTL8139 Fast Ethernet"},
+ { RTL8139_CB, "RealTek RTL8139B PCI/CardBus"},
+ { SMC1211TX, "SMC1211TX EZCard 10/100 (RealTek RTL8139)"},
+ { MPX5030, "Accton MPX5030 (RealTek RTL8139)"},
+ { SIS900, "SiS 900 (RealTek RTL8139) Fast Ethernet"},
+ { SIS7016, "SiS 7016 (RealTek RTL8139) Fast Ethernet"},
+ {0,},
+};
+
+static struct pci_device_id rtl8139_pci_tbl[] __devinitdata = {
+ {0x10ec, 0x8139, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139 },
+ {0x10ec, 0x8138, PCI_ANY_ID, PCI_ANY_ID, 0, 0, RTL8139_CB },
+ {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SMC1211TX },
+ {0x1113, 0x1211, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MPX5030 },
+ {0x1039, 0x0900, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS900 },
+ {0x1039, 0x7016, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS7016 },
+ {0,},
+};
+MODULE_DEVICE_TABLE (pci, rtl8139_pci_tbl);
+
+
+/* The rest of these values should never change. */
+#define NUM_TX_DESC 4 /* Number of Tx descriptor registers. */
+
+/* Symbolic offsets to registers. */
+enum RTL8139_registers {
+ MAC0 = 0, /* Ethernet hardware address. */
+ MAR0 = 8, /* Multicast filter. */
+ TxStatus0 = 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,
+ Config4 = 0x5A, /* absent on RTL-8139A */
+ HltClk = 0x5B,
+ MultiIntr = 0x5C,
+ TxSummary = 0x60,
+ BasicModeCtrl = 0x62,
+ BasicModeStatus = 0x64,
+ NWayAdvert = 0x66,
+ NWayLPAR = 0x68,
+ NWayExpansion = 0x6A,
+ /* Undocumented registers, but required for proper operation. */
+ FIFOTMS = 0x70, /* FIFO Control and test. */
+ CSCR = 0x74, /* Chip Status and Configuration Register. */
+ PARA78 = 0x78,
+ PARA7c = 0x7c, /* Magic transceiver parameter register. */
+};
+
+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,
+};
+
+/* Bits in RxConfig. */
+enum rx_mode_bits {
+ AcceptErr = 0x20,
+ AcceptRunt = 0x10,
+ AcceptBroadcast = 0x08,
+ AcceptMulticast = 0x04,
+ AcceptMyPhys = 0x02,
+ AcceptAllPhys = 0x01,
+};
+
+/* Bits in Config1 */
+enum Config1Bits {
+ Cfg1_PM_Enable = 0x01,
+ Cfg1_VPD_Enable = 0x02,
+ Cfg1_PIO = 0x04,
+ Cfg1_MMIO = 0x08,
+ Cfg1_LWAKE = 0x10,
+ Cfg1_Driver_Load = 0x20,
+ Cfg1_LED0 = 0x40,
+ Cfg1_LED1 = 0x80,
+};
+
+/* Twister tuning parameters from RealTek.
+ Completely undocumented, but required to tune bad links. */
+enum CSCRBits {
+ CSCR_LinkOKBit = 0x0400,
+ CSCR_LinkChangeBit = 0x0800,
+ CSCR_LinkStatusBits = 0x0f000,
+ CSCR_LinkDownOffCmd = 0x003c0,
+ CSCR_LinkDownCmd = 0x0f3c0,
+};
+#define PARA78_default 0x78fa8388
+#define PARA7c_default 0xcb38de43 /* param[0][3] */
+#define PARA7c_xxx 0xcb38de43
+unsigned long param[4][4] = {
+ {0xcb39de43, 0xcb39ce43, 0xfb38de03, 0xcb38de43},
+ {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
+ {0xcb39de43, 0xcb39ce43, 0xcb39ce83, 0xcb39ce83},
+ {0xbb39de43, 0xbb39ce43, 0xbb39ce83, 0xbb39ce83}
+};
+
+struct ring_info {
+ struct sk_buff *skb;
+ dma_addr_t mapping;
+};
+
+
+#define PRIV_ALIGN 15 /* Required alignment mask */
+struct rtl8139_private {
+ chip_t chip;
+ void *mmio_addr;
+ spinlock_t lock;
+ int drv_flags;
+ struct pci_dev *pci_dev;
+ struct net_device_stats stats;
+ struct timer_list timer; /* Media selection timer. */
+ unsigned char *rx_ring;
+ unsigned int cur_rx; /* Index into the Rx buffer of next Rx pkt. */
+ unsigned int rx_config;
+ unsigned int cur_tx, dirty_tx, tx_flag;
+ /* The saved address of a sent-in-place packet/buffer, for skfree(). */
+ struct ring_info tx_info[NUM_TX_DESC];
+ unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
+ unsigned char *tx_bufs; /* Tx bounce buffer region. */
+ dma_addr_t rx_ring_dma;
+ dma_addr_t tx_bufs_dma;
+ char phys[4]; /* MII device addresses. */
+ char twistie, twist_row, twist_col; /* Twister tune state. */
+ unsigned int full_duplex:1; /* Full-duplex operation requested. */
+ unsigned int duplex_lock:1;
+ 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. */
+};
+
+MODULE_AUTHOR ("Jeff Garzik <jgarzik@mandrakesoft.com>");
+MODULE_DESCRIPTION ("RealTek RTL-8139 Fast Ethernet driver");
+MODULE_PARM (multicast_filter_limit, "i");
+MODULE_PARM (max_interrupt_work, "i");
+MODULE_PARM (debug, "i");
+
+static int read_eeprom (void *ioaddr, int location, int addr_len);
+static int rtl8139_open (struct net_device *dev);
+static int mdio_read (struct net_device *dev, int phy_id, int location);
+static void mdio_write (struct net_device *dev, int phy_id, int location,
+ int val);
+static void rtl8139_timer (unsigned long data);
+static void rtl8139_tx_timeout (struct net_device *dev);
+static void rtl8139_init_ring (struct net_device *dev);
+static int rtl8139_start_xmit (struct sk_buff *skb,
+ struct net_device *dev);
+static void rtl8139_interrupt (int irq, void *dev_instance,
+ struct pt_regs *regs);
+static int rtl8139_close (struct net_device *dev);
+static int mii_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
+static struct net_device_stats *rtl8139_get_stats (struct net_device *dev);
+static inline u32 ether_crc (int length, unsigned char *data);
+static void rtl8139_set_rx_mode (struct net_device *dev);
+
+/* read after write, to avoid rtl8139 bug w/ posted MMIO writes */
+#define RTL_W8(reg, val8) do { writeb (val8, ioaddr + reg); readb (ioaddr + reg); } while (0)
+#define RTL_W16(reg, val16) do { writew (val16, ioaddr + reg); readw (ioaddr + reg); } while (0)
+#define RTL_W32(reg, val32) do { writel (val32, ioaddr + reg); readl (ioaddr + reg); } while (0)
+#define RTL_R8(reg) readb (ioaddr + reg)
+#define RTL_R16(reg) readw (ioaddr + reg)
+#define RTL_R32(reg) readl (ioaddr + reg)
+
+
+static const char * __devinit rtl8139_name_from_chip (chip_t chip)
+{
+ int i;
+
+ for (i = 0; i < arraysize (chip_info); i++)
+ if (chip == chip_info[i].chip)
+ return chip_info[i].name;
+
+ return "unknown";
+}
+
+
+static int __devinit rtl8139_init_pci (struct pci_dev *pdev, void **ioaddr_out)
+{
+ void *ioaddr = NULL;
+ u8 tmp8;
+ int rc;
+ u32 pio_start, pio_end, pio_flags;
+ u32 mmio_start, mmio_end, mmio_flags;
+
+ DPRINTK ("ENTER\n");
+
+ assert (pdev != NULL);
+ assert (ioaddr_out != NULL);
+
+ *ioaddr_out = NULL;
+
+ pio_start = pci_resource_start (pdev, 0);
+ pio_end = pci_resource_end (pdev, 0);
+ pio_flags = pci_resource_flags (pdev, 0);
+
+ mmio_start = pci_resource_start (pdev, 1);
+ mmio_end = pci_resource_end (pdev, 1);
+ mmio_flags = pci_resource_flags (pdev, 1);
+
+ /* make sure PCI base addr 0 is PIO */
+ if (pio_start == 0 || pio_end <= pio_start ||
+ (!(pio_flags & IORESOURCE_IO))) {
+ printk (KERN_ERR PFX "no PIO resource, aborting\n");
+ return -ENODEV;
+ }
+
+ /* make sure PCI base addr 1 is MMIO */
+ if (mmio_start == 0 || mmio_end <= mmio_start ||
+ (!(mmio_flags & IORESOURCE_MEM))) {
+ printk (KERN_ERR PFX "no MMIO resource, aborting\n");
+ return -ENODEV;
+ }
+
+ /* make sure our PIO region in PCI space is available */
+ if (!request_region (pio_start, RTL_IO_SIZE, RTL8139_MODULE_NAME)) {
+ printk (KERN_ERR PFX "no I/O resource available, aborting\n");
+ return -EBUSY;
+ }
+
+ /* make sure our MMIO region in PCI space is available */
+ if (!request_mem_region (mmio_start, RTL_IO_SIZE, RTL8139_MODULE_NAME)) {
+ release_region (pio_start, RTL_IO_SIZE);
+ printk (KERN_ERR PFX "no mem resource available, aborting\n");
+ return -EBUSY;
+ }
+
+ /* enable device (incl. PCI PM wakeup), and bus-mastering */
+ pci_enable_device (pdev);
+ pci_set_master (pdev);
+
+ /* ioremap MMIO region */
+ ioaddr = ioremap (mmio_start, RTL_IO_SIZE);
+ if (ioaddr == NULL) {
+ printk (KERN_ERR PFX "cannot remap MMIO, aborting\n");
+ rc = -EIO;
+ goto err_out;
+ }
+
+ /* Bring the chip out of low-power mode. */
+ RTL_W8 (Config1, 0x00);
+
+ /* make sure chip thinks PIO and MMIO are enabled */
+ tmp8 = RTL_R8 (Config1);
+ if ((tmp8 & Cfg1_PIO) == 0) {
+ printk (KERN_ERR PFX "PIO not enabled, Cfg1=%02X, aborting\n", tmp8);
+ rc = -EIO;
+ goto err_out;
+ }
+ if ((tmp8 & Cfg1_MMIO) == 0) {
+ printk (KERN_ERR PFX "MMIO not enabled, Cfg1=%02X, aborting\n", tmp8);
+ rc = -EIO;
+ goto err_out;
+ }
+
+ /* sanity checks -- ensure PIO and MMIO registers agree */
+ assert (inb (pio_start+Config0) == RTL_R8 (Config0));
+ assert (inb (pio_start+Config1) == RTL_R8 (Config1));
+ assert (inb (pio_start+TxConfig) == RTL_R8 (TxConfig));
+ assert (inb (pio_start+RxConfig) == RTL_R8 (RxConfig));
+
+ DPRINTK ("EXIT, returning 0\n");
+ *ioaddr_out = ioaddr;
+ return 0;
+
+err_out:
+ if (ioaddr)
+ iounmap (ioaddr);
+ release_region (pio_start, RTL_IO_SIZE);
+ release_mem_region (mmio_start, RTL_IO_SIZE);
+ DPRINTK ("EXIT, returning %d\n", rc);
+ return rc;
+}
+
+
+static int __devinit rtl8139_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ struct net_device *dev;
+ struct rtl8139_private *tp;
+ int i, addr_len, option = -1;
+ void *ioaddr = NULL;
+
+ DPRINTK ("ENTER\n");
+
+ assert (pdev != NULL);
+ assert (ent != NULL);
+
+ i = rtl8139_init_pci (pdev, &ioaddr);
+ if (i < 0) {
+ DPRINTK ("EXIT, returning %d\n", i);
+ return i;
+ }
+
+ assert (ioaddr != NULL);
+
+ /* dev zeroed in init_etherdev */
+ dev = init_etherdev (NULL, sizeof (*tp) + PRIV_ALIGN);
+ if (dev == NULL) {
+ iounmap (ioaddr);
+ printk (KERN_ERR PFX "unable to alloc new ethernet\n");
+ DPRINTK ("EXIT, returning -ENOMEM\n");
+ return -ENOMEM;
+ }
+
+ addr_len = read_eeprom (ioaddr, 0, 8) == 0x8129 ? 8 : 6;
+ for (i = 0; i < 3; i++)
+ ((u16 *) (dev->dev_addr))[i] =
+ le16_to_cpu (read_eeprom (ioaddr, i + 7, addr_len));
+
+ /* The Rtl8139-specific entries in the device structure. */
+ dev->open = rtl8139_open;
+ dev->hard_start_xmit = rtl8139_start_xmit;
+ dev->stop = rtl8139_close;
+ dev->get_stats = rtl8139_get_stats;
+ dev->set_multicast_list = rtl8139_set_rx_mode;
+ dev->do_ioctl = mii_ioctl;
+ dev->tx_timeout = rtl8139_tx_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+
+ dev->irq = pdev->irq;
+ dev->base_addr = pci_resource_start (pdev, 1);
+
+ dev->priv = tp = (void *)
+ (((long)dev->priv + PRIV_ALIGN) & ~PRIV_ALIGN);
+
+ printk (KERN_INFO "%s: %s at 0x%lx, IRQ %d, "
+ "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
+ dev->name, rtl8139_name_from_chip(ent->driver_data),
+ dev->base_addr, dev->irq,
+ dev->dev_addr[0], dev->dev_addr[1],
+ dev->dev_addr[2], dev->dev_addr[3],
+ dev->dev_addr[4], dev->dev_addr[5]);
+
+ /* tp zeroed in init_etherdev */
+ tp->drv_flags = PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
+ PCI_COMMAND_MASTER | RTL8139_CAPS;
+ tp->pci_dev = pdev;
+ tp->chip = ent->driver_data;
+ tp->mmio_addr = ioaddr;
+ tp->lock = SPIN_LOCK_UNLOCKED;
+
+ PCI_SET_DRIVER_DATA (pdev, dev);
+
+ tp->phys[0] = 32;
+
+ /* Put the chip into low-power mode. */
+ RTL_W8 (Cfg9346, 0xC0);
+ RTL_W8 (Config1, 0x03); /* Enable PM & PCI VPD */
+ RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
+
+ /* The lower four bits are the media type. */
+ if (option > 0) {
+ tp->full_duplex = (option & 0x200) ? 1 : 0;
+ tp->default_port = option & 15;
+ if (tp->default_port)
+ tp->medialock = 1;
+ }
+
+ if (tp->full_duplex) {
+ printk (KERN_INFO
+ "%s: Media type forced to Full Duplex.\n",
+ dev->name);
+ mdio_write (dev, tp->phys[0], 4, 0x141);
+ tp->duplex_lock = 1;
+ }
+
+ DPRINTK ("EXIT - returning 0\n");
+ return 0;
+}
+
+
+static void __devexit rtl8139_remove_one (struct pci_dev *pdev)
+{
+ struct net_device *dev = PCI_GET_DRIVER_DATA (pdev);
+ struct rtl8139_private *np;
+
+ DPRINTK ("ENTER\n");
+
+ assert (dev != NULL);
+
+ np = (struct rtl8139_private *) (dev->priv);
+ assert (np != NULL);
+
+ unregister_netdev (dev);
+
+ iounmap (np->mmio_addr);
+ release_region (pci_resource_start (pdev, 0), RTL_IO_SIZE);
+ release_mem_region (pci_resource_start (pdev, 1), RTL_IO_SIZE);
+
+#ifndef RTL8139_NDEBUG
+ /* poison memory before freeing */
+ memset (dev, 0xC0,
+ sizeof (struct net_device) +
+ sizeof (struct rtl8139_private) +
+ PRIV_ALIGN);
+#endif
+
+ kfree (dev);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+/* 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.
+ No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
+ */
+
+#define eeprom_delay() readl(ee_addr)
+
+/* The EEPROM commands include the alway-set leading bit. */
+#define EE_WRITE_CMD (5)
+#define EE_READ_CMD (6)
+#define EE_ERASE_CMD (7)
+
+static int __devinit read_eeprom (void *ioaddr, int location, int addr_len)
+{
+ int i;
+ unsigned retval = 0;
+ void *ee_addr = ioaddr + Cfg9346;
+ int read_cmd = location | (EE_READ_CMD << addr_len);
+
+ DPRINTK ("ENTER\n");
+
+ writeb (EE_ENB & ~EE_CS, ee_addr);
+ writeb (EE_ENB, ee_addr);
+ eeprom_delay ();
+
+ /* Shift the read command bits out. */
+ for (i = 4 + addr_len; i >= 0; i--) {
+ int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
+ writeb (EE_ENB | dataval, ee_addr);
+ eeprom_delay ();
+ writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
+ eeprom_delay ();
+ }
+ writeb (EE_ENB, ee_addr);
+ eeprom_delay ();
+
+ for (i = 16; i > 0; i--) {
+ writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
+ eeprom_delay ();
+ retval =
+ (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
+ 0);
+ writeb (EE_ENB, ee_addr);
+ eeprom_delay ();
+ }
+
+ /* Terminate the EEPROM access. */
+ writeb (~EE_CS, ee_addr);
+ eeprom_delay ();
+
+ DPRINTK ("EXIT - returning %d\n", retval);
+ return retval;
+}
+
+/* MII serial management: mostly bogus for now. */
+/* Read and write the MII management registers using software-generated
+ serial MDIO protocol.
+ The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
+ met by back-to-back PCI I/O cycles, but we insert a delay to avoid
+ "overclocking" issues. */
+#define MDIO_DIR 0x80
+#define MDIO_DATA_OUT 0x04
+#define MDIO_DATA_IN 0x02
+#define MDIO_CLK 0x01
+#define MDIO_WRITE0 (MDIO_DIR)
+#define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
+
+#define mdio_delay() readb(mdio_addr)
+
+
+static char mii_2_8139_map[8] = {
+ BasicModeCtrl,
+ BasicModeStatus,
+ 0,
+ 0,
+ NWayAdvert,
+ NWayLPAR,
+ NWayExpansion,
+ 0
+};
+
+
+/* Syncronize the MII management interface by shifting 32 one bits out. */
+static void mdio_sync (void *mdio_addr)
+{
+ int i;
+
+ DPRINTK ("ENTER\n");
+
+ for (i = 32; i >= 0; i--) {
+ writeb (MDIO_WRITE1, mdio_addr);
+ mdio_delay ();
+ writeb (MDIO_WRITE1 | MDIO_CLK, mdio_addr);
+ mdio_delay ();
+ }
+
+ DPRINTK ("EXIT\n");
+}
+
+
+static int mdio_read (struct net_device *dev, int phy_id, int location)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *mdio_addr = tp->mmio_addr + Config4;
+ int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
+ int retval = 0;
+ int i;
+
+ DPRINTK ("ENTER\n");
+
+ if (phy_id > 31) { /* Really a 8139. Use internal registers. */
+ DPRINTK ("EXIT after directly using 8139 internal regs\n");
+ return location < 8 && mii_2_8139_map[location] ?
+ readw (tp->mmio_addr + mii_2_8139_map[location]) : 0;
+ }
+ mdio_sync (mdio_addr);
+ /* Shift the read command bits out. */
+ for (i = 15; i >= 0; i--) {
+ int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0;
+
+ writeb (MDIO_DIR | dataval, mdio_addr);
+ mdio_delay ();
+ writeb (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--) {
+ writeb (0, mdio_addr);
+ mdio_delay ();
+ retval =
+ (retval << 1) | ((readb (mdio_addr) & MDIO_DATA_IN) ? 1
+ : 0);
+ writeb (MDIO_CLK, mdio_addr);
+ mdio_delay ();
+ }
+
+ DPRINTK ("EXIT, returning %d\n", (retval >> 1) & 0xffff);
+ return (retval >> 1) & 0xffff;
+}
+
+
+static void mdio_write (struct net_device *dev, int phy_id, int location,
+ int value)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *mdio_addr = tp->mmio_addr + Config4;
+ int mii_cmd =
+ (0x5002 << 16) | (phy_id << 23) | (location << 18) | value;
+ int i;
+
+ DPRINTK ("ENTER\n");
+
+ if (phy_id > 31) { /* Really a 8139. Use internal registers. */
+ if (location < 8 && mii_2_8139_map[location]) {
+ writew (value,
+ tp->mmio_addr + mii_2_8139_map[location]);
+ readw (tp->mmio_addr + mii_2_8139_map[location]);
+ }
+ DPRINTK ("EXIT after directly using 8139 internal regs\n");
+ return;
+ }
+ mdio_sync (mdio_addr);
+
+ /* Shift the command bits out. */
+ for (i = 31; i >= 0; i--) {
+ int dataval =
+ (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
+ writeb (dataval, mdio_addr);
+ mdio_delay ();
+ writeb (dataval | MDIO_CLK, mdio_addr);
+ mdio_delay ();
+ }
+
+ /* Clear out extra bits. */
+ for (i = 2; i > 0; i--) {
+ writeb (0, mdio_addr);
+ mdio_delay ();
+ writeb (MDIO_CLK, mdio_addr);
+ mdio_delay ();
+ }
+
+ DPRINTK ("EXIT\n");
+}
+
+
+static int rtl8139_open (struct net_device *dev)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+ int i;
+
+ DPRINTK ("ENTER\n");
+
+ MOD_INC_USE_COUNT;
+
+ /* Soft reset the chip. */
+ RTL_W8 (ChipCmd, CmdReset);
+
+ if (request_irq (dev->irq, &rtl8139_interrupt, SA_SHIRQ, dev->name, dev)) {
+ DPRINTK ("EXIT, returning -EBUSY\n");
+ MOD_DEC_USE_COUNT;
+ return -EBUSY;
+ }
+
+ tp->tx_bufs = pci_alloc_consistent(tp->pci_dev, TX_BUF_SIZE * NUM_TX_DESC,
+ &tp->tx_bufs_dma);
+ tp->rx_ring = pci_alloc_consistent(tp->pci_dev, RX_BUF_LEN + 16,
+ &tp->rx_ring_dma);
+ if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
+ free_irq(dev->irq, dev);
+
+ if (tp->tx_bufs)
+ pci_free_consistent(tp->pci_dev, TX_BUF_SIZE * NUM_TX_DESC,
+ tp->tx_bufs, tp->tx_bufs_dma);
+ if (tp->rx_ring)
+ pci_free_consistent(tp->pci_dev, RX_BUF_LEN + 16,
+ tp->rx_ring, tp->rx_ring_dma);
+
+ DPRINTK ("EXIT, returning -ENOMEM\n");
+ MOD_DEC_USE_COUNT;
+ return -ENOMEM;
+
+ }
+
+ rtl8139_init_ring (dev);
+ tp->full_duplex = tp->duplex_lock;
+ tp->tx_flag = (TX_FIFO_THRESH << 11) & 0x003f0000;
+ tp->rx_config =
+ (RX_FIFO_THRESH << 13) |
+ (RX_BUF_LEN_IDX << 11) |
+ (RX_DMA_BURST << 8);
+
+ /* Check that the chip has finished the reset. */
+ for (i = 1000; i > 0; i--)
+ if ((RTL_R8 (ChipCmd) & CmdReset) == 0)
+ break;
+
+ RTL_W32 (MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
+ RTL_W32 (MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
+
+ /* Must enable Tx/Rx before setting transfer thresholds! */
+ RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
+ RTL_W32 (RxConfig, tp->rx_config);
+ RTL_W32 (TxConfig, (TX_DMA_BURST << 8) | 0x00000000);
+
+ /* Reset N-Way to chipset defaults */
+ RTL_W16 (BasicModeCtrl, (1<<15)|(1<<12)|(1<<9));
+ for (i = 1000; i > 0; i--)
+ if ((RTL_R8 (BasicModeCtrl) & (1<<15)) == 0)
+ break;
+
+ /* Set N-Way to sane defaults */
+ RTL_W16 (FIFOTMS, 0x0000);
+ RTL_W16 (NWayAdvert, (1<<13)|(1<<8)|(1<<7)|(1<<6)|(1<<5)|0x1);
+ RTL_W16 (BasicModeCtrl, (1<<13)|(1<<12)|(1<<9)|(1<<8));
+
+ RTL_W8 (Cfg9346, 0xC0);
+ RTL_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
+ RTL_W8 (Cfg9346, 0x00);
+
+ RTL_W32 (RxBuf, tp->rx_ring_dma);
+
+ /* Start the chip's Tx and Rx process. */
+ RTL_W32 (RxMissed, 0);
+ rtl8139_set_rx_mode (dev);
+
+ RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
+
+ /* Enable all known interrupts by setting the interrupt mask. */
+ RTL_W16 (IntrMask,
+ PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver
+ | TxErr | TxOK | RxErr | RxOK);
+
+ DPRINTK ("%s: rtl8139_open() ioaddr %#lx IRQ %d"
+ " GP Pins %2.2x %s-duplex.\n",
+ dev->name, pci_resource_start (tp->pci_dev, 1),
+ dev->irq, RTL_R8 (GPPinData),
+ tp->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 = jiffies + 3 * HZ;
+ tp->timer.data = (unsigned long) dev;
+ tp->timer.function = &rtl8139_timer;
+ add_timer (&tp->timer);
+
+ netif_start_queue (dev);
+
+ DPRINTK ("EXIT, returning 0\n");
+ return 0;
+}
+
+/* Start the hardware at open or resume. */
+static void rtl8139_hw_start (struct net_device *dev)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+ int i;
+
+ DPRINTK ("ENTER\n");
+
+ /* Soft reset the chip. */
+ RTL_W8 (ChipCmd, CmdReset);
+ /* Check that the chip has finished the reset. */
+ for (i = 1000; i > 0; i--)
+ if ((RTL_R8 (ChipCmd) & CmdReset) == 0)
+ break;
+
+ /* Restore our idea of the MAC address. */
+ RTL_W32 (MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
+ RTL_W32 (MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
+
+ /* Hmmm, do these belong here? */
+ RTL_W8 (Cfg9346, 0x00);
+ tp->cur_rx = 0;
+
+ /* Must enable Tx/Rx before setting transfer thresholds! */
+ RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
+ RTL_W32 (RxConfig, tp->rx_config);
+ /* Check this value: the documentation contradicts ifself. Is the
+ IFG correct with bit 28:27 zero, or with |0x03000000 ? */
+ RTL_W32 (TxConfig, (TX_DMA_BURST << 8) | 0x00000000);
+
+ /* Reset N-Way to chipset defaults */
+ RTL_W16 (BasicModeCtrl, (1<<15)|(1<<12)|(1<<9));
+ for (i = 1000; i > 0; i--)
+ if ((RTL_R8 (BasicModeCtrl) & (1<<15)) == 0)
+ break;
+
+ /* Set N-Way to sane defaults */
+ RTL_W16 (FIFOTMS, 0x0000);
+ RTL_W16 (NWayAdvert, (1<<13)|(1<<8)|(1<<7)|(1<<6)|(1<<5)|0x1);
+ RTL_W16 (BasicModeCtrl, (1<<13)|(1<<12)|(1<<9)|(1<<8));
+
+ /* check_duplex() here. */
+ RTL_W8 (Cfg9346, 0xC0);
+ RTL_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
+ RTL_W8 (Cfg9346, 0x00);
+
+ RTL_W32 (RxBuf, tp->rx_ring_dma);
+ /* Start the chip's Tx and Rx process. */
+ RTL_W32 (RxMissed, 0);
+ rtl8139_set_rx_mode (dev);
+ RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
+ /* Enable all known interrupts by setting the interrupt mask. */
+ RTL_W16 (IntrMask,
+ PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver
+ | TxErr | TxOK | RxErr | RxOK);
+
+ netif_start_queue (dev);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+#ifndef RTL_TUNE_TWISTER
+static inline void rtl8139_tune_twister (struct net_device *dev,
+ struct rtl8139_private *tp) {}
+#else
+static void rtl8139_tune_twister (struct net_device *dev,
+ struct rtl8139_private *tp)
+{
+ int linkcase;
+
+ DPRINTK ("ENTER\n");
+
+ /* This is a complicated state machine to configure the "twister" for
+ impedance/echos based on the cable length.
+ All of this is magic and undocumented.
+ */
+ switch (tp->twistie) {
+ case 1:
+ if (RTL_R16 (CSCR) & CSCR_LinkOKBit) {
+ /* We have link beat, let us tune the twister. */
+ RTL_W16 (CSCR, CSCR_LinkDownOffCmd);
+ tp->twistie = 2; /* Change to state 2. */
+ next_tick = HZ / 10;
+ } else {
+ /* Just put in some reasonable defaults for when beat returns. */
+ RTL_W16 (CSCR, CSCR_LinkDownCmd);
+ RTL_W32 (FIFOTMS, 0x20); /* Turn on cable test mode. */
+ RTL_W32 (PARA78, PARA78_default);
+ RTL_W32 (PARA7c, PARA7c_default);
+ tp->twistie = 0; /* Bail from future actions. */
+ }
+ break;
+ case 2:
+ /* Read how long it took to hear the echo. */
+ linkcase = RTL_R16 (CSCR) & CSCR_LinkStatusBits;
+ if (linkcase == 0x7000)
+ tp->twist_row = 3;
+ else if (linkcase == 0x3000)
+ tp->twist_row = 2;
+ else if (linkcase == 0x1000)
+ tp->twist_row = 1;
+ else
+ tp->twist_row = 0;
+ tp->twist_col = 0;
+ tp->twistie = 3; /* Change to state 2. */
+ next_tick = HZ / 10;
+ break;
+ case 3:
+ /* Put out four tuning parameters, one per 100msec. */
+ if (tp->twist_col == 0)
+ RTL_W16 (FIFOTMS, 0);
+ RTL_W32 (PARA7c, param[(int) tp->twist_row]
+ [(int) tp->twist_col]);
+ next_tick = HZ / 10;
+ if (++tp->twist_col >= 4) {
+ /* For short cables we are done.
+ For long cables (row == 3) check for mistune. */
+ tp->twistie =
+ (tp->twist_row == 3) ? 4 : 0;
+ }
+ break;
+ case 4:
+ /* Special case for long cables: check for mistune. */
+ if ((RTL_R16 (CSCR) &
+ CSCR_LinkStatusBits) == 0x7000) {
+ tp->twistie = 0;
+ break;
+ } else {
+ RTL_W32 (PARA7c, 0xfb38de03);
+ tp->twistie = 5;
+ next_tick = HZ / 10;
+ }
+ break;
+ case 5:
+ /* Retune for shorter cable (column 2). */
+ RTL_W32 (FIFOTMS, 0x20);
+ RTL_W32 (PARA78, PARA78_default);
+ RTL_W32 (PARA7c, PARA7c_default);
+ RTL_W32 (FIFOTMS, 0x00);
+ tp->twist_row = 2;
+ tp->twist_col = 0;
+ tp->twistie = 3;
+ next_tick = HZ / 10;
+ break;
+
+ default:
+ /* do nothing */
+ break;
+ }
+
+ DPRINTK ("EXIT\n");
+}
+#endif /* RTL_TUNE_TWISTER */
+
+
+static void rtl8139_timer (unsigned long data)
+{
+ struct net_device *dev = (struct net_device *) data;
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+ int next_tick = 60 * HZ;
+ int mii_reg5 = mdio_read (dev, tp->phys[0], 5);
+
+ DPRINTK ("ENTER\n");
+
+ if (!tp->duplex_lock && mii_reg5 != 0xffff) {
+ int duplex = (mii_reg5 & 0x0100)
+ || (mii_reg5 & 0x01C0) == 0x0040;
+ if (tp->full_duplex != duplex) {
+ tp->full_duplex = duplex;
+ printk (KERN_INFO
+ "%s: Setting %s-duplex based on MII #%d link"
+ " partner ability of %4.4x.\n", dev->name,
+ tp->full_duplex ? "full" : "half",
+ tp->phys[0], mii_reg5);
+ RTL_W8 (Cfg9346, 0xC0);
+ RTL_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
+ RTL_W8 (Cfg9346, 0x00);
+ }
+ }
+
+ rtl8139_tune_twister (dev, tp);
+
+ DPRINTK ("%s: Media selection tick, Link partner %4.4x.\n",
+ dev->name, RTL_R16 (NWayLPAR));
+ DPRINTK ("%s: Other registers are IntMask %4.4x IntStatus %4.4x"
+ " RxStatus %4.4x.\n", dev->name,
+ RTL_R16 (IntrMask),
+ RTL_R16 (IntrStatus),
+ RTL_R32 (RxEarlyStatus));
+ DPRINTK ("%s: Chip config %2.2x %2.2x.\n",
+ dev->name, RTL_R8 (Config0),
+ RTL_R8 (Config1));
+
+ tp->timer.expires = jiffies + next_tick;
+ add_timer (&tp->timer);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+static void rtl8139_tx_timeout (struct net_device *dev)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+ int mii_reg, i;
+
+ DPRINTK ("ENTER\n");
+
+ netif_stop_queue (dev);
+
+ DPRINTK ("%s: Transmit timeout, status %2.2x %4.4x "
+ "media %2.2x.\n", dev->name,
+ readb (ioaddr + ChipCmd),
+ readw (ioaddr + IntrStatus),
+ readb (ioaddr + GPPinData));
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ RTL_W16 (IntrMask, 0x0000);
+ /* Emit info to figure out what went wrong. */
+ printk (KERN_DEBUG
+ "%s: Tx queue start entry %d dirty entry %d.\n",
+ dev->name, tp->cur_tx, tp->dirty_tx);
+ for (i = 0; i < NUM_TX_DESC; i++)
+ printk (KERN_DEBUG "%s: Tx descriptor %d is %8.8x.%s\n",
+ dev->name, i, readl (ioaddr + TxStatus0 + i * 4),
+ i ==
+ tp->dirty_tx % NUM_TX_DESC ? " (queue head)" : "");
+ printk (KERN_DEBUG "%s: MII #%d registers are:", dev->name,
+ tp->phys[0]);
+ for (mii_reg = 0; mii_reg < 8; mii_reg++)
+ printk (" %4.4x", mdio_read (dev, tp->phys[0], mii_reg));
+ printk (".\n");
+
+ /* Stop a shared interrupt from scavenging while we are. */
+ tp->dirty_tx = tp->cur_tx = 0;
+
+ /* Dump the unsent Tx packets. */
+ for (i = 0; i < NUM_TX_DESC; i++) {
+ struct ring_info *rp = &tp->tx_info[i];
+ if (rp->skb) {
+ dev_kfree_skb (rp->skb);
+ rp->skb = NULL;
+ tp->stats.tx_dropped++;
+ }
+ if (rp->mapping != 0) {
+ pci_unmap_single (tp->pci_dev, rp->mapping, rp->skb->len);
+ rp->mapping = 0;
+ }
+ }
+
+ rtl8139_hw_start (dev);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void rtl8139_init_ring (struct net_device *dev)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ int i;
+
+ DPRINTK ("ENTER\n");
+
+ tp->cur_rx = 0;
+ tp->dirty_tx = tp->cur_tx = 0;
+
+ for (i = 0; i < NUM_TX_DESC; i++) {
+ tp->tx_info[i].skb = NULL;
+ tp->tx_info[i].mapping = 0;
+ tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
+ }
+
+ DPRINTK ("EXIT\n");
+}
+
+static int rtl8139_start_xmit (struct sk_buff *skb, struct net_device *dev)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+ int entry;
+ unsigned long flags;
+
+ DPRINTK ("ENTER\n");
+
+ netif_stop_queue (dev);
+
+ /* Calculate the next Tx descriptor entry. */
+ entry = tp->cur_tx % NUM_TX_DESC;
+
+ spin_lock_irqsave (&tp->lock, flags);
+
+ tp->tx_info[entry].skb = skb;
+ if ((long) skb->data & 3) { /* Must use alignment buffer. */
+ tp->tx_info[entry].mapping = 0;
+ memcpy (tp->tx_buf[entry], skb->data, skb->len);
+
+ assert (tp->tx_bufs_dma > 0);
+ RTL_W32 (TxAddr0 + entry * 4, tp->tx_bufs_dma + (tp->tx_buf[entry] - tp->tx_bufs));
+ } else {
+ tp->tx_info[entry].mapping =
+ pci_map_single(tp->pci_dev, skb->data, skb->len);
+
+ assert (tp->tx_info[entry].mapping > 0);
+ RTL_W32 (TxAddr0 + entry * 4, tp->tx_info[entry].mapping);
+ }
+
+ /* Note: the chip doesn't have auto-pad! */
+ RTL_W32 (TxStatus0 + entry * 4,
+ tp->tx_flag | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN));
+
+ dev->trans_start = jiffies;
+ if (++tp->cur_tx - tp->dirty_tx < NUM_TX_DESC) /* Typical path */
+ netif_start_queue (dev);
+
+ spin_unlock_irqrestore (&tp->lock, flags);
+
+ DPRINTK ("%s: Queued Tx packet at %p size %lu to slot %d.\n",
+ dev->name, skb->data, skb->len, entry);
+
+ DPRINTK ("EXIT\n");
+ return 0;
+}
+
+
+static inline void rtl8139_tx_interrupt (struct net_device *dev,
+ struct rtl8139_private *tp)
+{
+ void *ioaddr;
+ unsigned int dirty_tx;
+
+ assert (dev != NULL);
+ assert (tp != NULL);
+
+ dirty_tx = tp->dirty_tx;
+ ioaddr = tp->mmio_addr;
+
+ while (tp->cur_tx - dirty_tx > 0) {
+ int entry = dirty_tx % NUM_TX_DESC;
+ int txstatus = readl (ioaddr + TxStatus0 + entry * 4);
+
+ if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
+ 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. */
+ DPRINTK ("%s: Transmit error, Tx status %8.8x.\n",
+ dev->name, txstatus);
+ tp->stats.tx_errors++;
+ if (txstatus & TxAborted) {
+ tp->stats.tx_aborted_errors++;
+ RTL_W32 (TxConfig, (TX_DMA_BURST << 8) | 0x03000001);
+ }
+ 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 {
+ if (txstatus & TxUnderrun) {
+ /* Add 64 to the Tx FIFO threshold. */
+ if (tp->tx_flag < 0x00300000)
+ tp->tx_flag += 0x00020000;
+ tp->stats.tx_fifo_errors++;
+ }
+ tp->stats.collisions += (txstatus >> 24) & 15;
+ tp->stats.tx_bytes += txstatus & 0x7ff;
+ tp->stats.tx_packets++;
+ }
+
+ if (tp->tx_info[entry].mapping != 0) {
+ pci_unmap_single (tp->pci_dev,
+ tp->tx_info[entry].mapping,
+ tp->tx_info[entry].skb->len);
+ tp->tx_info[entry].mapping = 0;
+ }
+ /* Free the original skb. */
+ dev_kfree_skb_irq (tp->tx_info[entry].skb);
+ tp->tx_info[entry].skb = NULL;
+ dirty_tx++;
+ if (tp->cur_tx - dirty_tx < NUM_TX_DESC)
+ netif_wake_queue (dev);
+ else
+ netif_stop_queue (dev);
+ }
+
+#ifndef RTL8139_NDEBUG
+ if (tp->cur_tx - dirty_tx > NUM_TX_DESC) {
+ printk (KERN_ERR
+ "%s: Out-of-sync dirty pointer, %d vs. %d.\n",
+ dev->name, dirty_tx, tp->cur_tx);
+ dirty_tx += NUM_TX_DESC;
+ }
+#endif
+
+ tp->dirty_tx = dirty_tx;
+}
+
+
+/* The data sheet doesn't describe the Rx ring at all, so I'm guessing at the
+ field alignments and semantics. */
+static inline void rtl8139_rx_interrupt (struct net_device *dev,
+ struct rtl8139_private *tp)
+{
+ void *ioaddr = tp->mmio_addr;
+ unsigned char *rx_ring = tp->rx_ring;
+ u16 cur_rx = tp->cur_rx;
+
+ DPRINTK ("%s: In rtl8139_rx(), current %4.4x BufAddr %4.4x,"
+ " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
+ readw (ioaddr + RxBufAddr),
+ readw (ioaddr + RxBufPtr),
+ readb (ioaddr + ChipCmd));
+
+ while ((readb (ioaddr + ChipCmd) & RxBufEmpty) == 0) {
+ int ring_offset = cur_rx % RX_BUF_LEN;
+ u32 rx_status =
+ le32_to_cpu (*(u32 *) (rx_ring + ring_offset));
+ int rx_size = rx_status >> 16;
+
+#ifdef RTL8139_DEBUG
+ int i;
+ DPRINTK ("%s: rtl8139_rx() status %4.4x, size %4.4x,"
+ " cur %4.4x.\n", dev->name, rx_status,
+ rx_size, cur_rx);
+ DPRINTK ("%s: Frame contents ", dev->name);
+ for (i = 0; i < 70; i++)
+ printk (" %2.2x", rx_ring[ring_offset + i]);
+ printk (".\n");
+#endif
+
+ if (rx_status &
+ (RxBadSymbol | RxRunt | RxTooLong | RxCRCErr |
+ RxBadAlign)) {
+ DPRINTK ("%s: Ethernet frame had errors,"
+ " status %8.8x.\n", dev->name,
+ rx_status);
+ if (rx_status & RxTooLong) {
+ DPRINTK ("%s: Oversized Ethernet frame, status %4.4x!\n",
+ dev->name, rx_status);
+ /* A.C.: The chip hangs here. */
+ }
+ 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++;
+ /* Reset the receiver, based on RealTek recommendation. (Bug?) */
+ tp->cur_rx = 0;
+ RTL_W8 (ChipCmd, CmdTxEnb);
+ /* A.C.: Reset the multicast list. */
+ rtl8139_set_rx_mode (dev);
+ RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
+ } 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 (KERN_WARNING
+ "%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;
+ /* This could presumably use two calls to copy_and_sum()? */
+ 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);
+#ifdef RTL8139_DEBUG
+ {
+ int i;
+ printk (KERN_DEBUG
+ "%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);
+ }
+#endif /* RTL8139_DEBUG */
+
+ } else {
+ eth_copy_and_sum (skb,
+ &rx_ring[ring_offset +
+ 4], rx_size, 0);
+ skb_put (skb, rx_size);
+ }
+ skb->protocol = eth_type_trans (skb, dev);
+ netif_rx (skb);
+ tp->stats.rx_bytes += rx_size;
+ tp->stats.rx_packets++;
+ }
+
+ cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
+ RTL_W16 (RxBufPtr, cur_rx - 16);
+ }
+ DPRINTK ("%s: Done rtl8139_rx(), current %4.4x BufAddr %4.4x,"
+ " free to %4.4x, Cmd %2.2x.\n", dev->name, cur_rx,
+ readw (ioaddr + RxBufAddr),
+ readw (ioaddr + RxBufPtr),
+ readb (ioaddr + ChipCmd));
+ tp->cur_rx = cur_rx;
+}
+
+
+static inline int rtl8139_weird_interrupt (struct net_device *dev,
+ struct rtl8139_private *tp,
+ int status, int link_changed)
+{
+ void *ioaddr;
+
+ DPRINTK ("%s: Abnormal interrupt, status %8.8x.\n",
+ dev->name, status);
+
+ assert (dev != NULL);
+ assert (tp != NULL);
+
+ ioaddr = tp->mmio_addr;
+
+ if (status == 0xffffffff) {
+ printk (KERN_WARNING PFX "abnormal interrupt, card ejected? (ok to ignore)\n");
+ return -1;
+ }
+
+ /* Update the error count. */
+ tp->stats.rx_missed_errors +=
+ readl (ioaddr + RxMissed);
+ RTL_W32 (RxMissed, 0);
+
+ if ((status & RxUnderrun) && link_changed &&
+ (tp->drv_flags & HAS_LNK_CHNG)) {
+ /* Really link-change on new chips. */
+ int lpar = readw (ioaddr + NWayLPAR);
+ int duplex = (lpar & 0x0100) || (lpar & 0x01C0) == 0x0040
+ || tp->duplex_lock;
+ if (tp->full_duplex != duplex) {
+ tp->full_duplex = duplex;
+ RTL_W8 (Cfg9346, 0xC0);
+ RTL_W8 (Config1, tp->full_duplex ? 0x60 : 0x20);
+ RTL_W8 (Cfg9346, 0x00);
+ }
+ status &= ~RxUnderrun;
+ }
+ 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 = readw (ioaddr + RxBufAddr) % RX_BUF_LEN;
+ RTL_W16 (RxBufPtr, tp->cur_rx - 16);
+ }
+ if (status & PCIErr) {
+ u16 pci_cmd_status;
+ pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
+
+ printk (KERN_ERR "%s: PCI Bus error %4.4x.\n",
+ dev->name, pci_cmd_status);
+ }
+
+ return 0;
+}
+
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+ after the Tx thread. */
+static void rtl8139_interrupt (int irq, void *dev_instance,
+ struct pt_regs *regs)
+{
+ struct net_device *dev = (struct net_device *) dev_instance;
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ int boguscnt = max_interrupt_work;
+ void *ioaddr = tp->mmio_addr;
+ int link_changed = 0; /* Grrr, avoid bogus "uninitialized" warning */
+
+ spin_lock_irq (&tp->lock);
+
+ do {
+ int status = readw (ioaddr + IntrStatus);
+ /* Acknowledge all of the current interrupt sources ASAP, but
+ an first get an additional status bit from CSCR. */
+ if (status & RxUnderrun)
+ link_changed = readw (ioaddr + CSCR) & CSCR_LinkChangeBit;
+ RTL_W16 (IntrStatus, status);
+
+ DPRINTK ("%s: interrupt status=%#4.4x new intstat=%#4.4x.\n",
+ dev->name, status,
+ readw (ioaddr + IntrStatus));
+
+ if ((status &
+ (PCIErr | PCSTimeout | RxUnderrun | RxOverflow |
+ RxFIFOOver | TxErr | TxOK | RxErr | RxOK)) == 0)
+ break;
+
+ /* Check uncommon events with one test. */
+ if (status & (PCIErr | PCSTimeout | RxUnderrun | RxOverflow |
+ RxFIFOOver | TxErr | RxErr))
+ if (rtl8139_weird_interrupt (dev, tp, status,
+ link_changed) == -1)
+ break;
+
+ if (status & (RxOK | RxUnderrun | RxOverflow | RxFIFOOver)) /* Rx interrupt */
+ rtl8139_rx_interrupt (dev, tp);
+
+ if (status & (TxOK | TxErr))
+ rtl8139_tx_interrupt (dev, tp);
+
+ if (--boguscnt < 0) {
+ printk (KERN_WARNING
+ "%s: Too much work at interrupt, "
+ "IntrStatus=0x%4.4x.\n", dev->name,
+ status);
+ /* Clear all interrupt sources. */
+ RTL_W16 (IntrStatus, 0xffff);
+ break;
+ }
+ } while (1);
+
+ DPRINTK ("%s: exiting interrupt, intr_status=%#4.4x.\n",
+ dev->name, readw (ioaddr + IntrStatus));
+
+ spin_unlock_irq (&tp->lock);
+ return;
+}
+
+static int rtl8139_close (struct net_device *dev)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+ int i;
+
+ DPRINTK ("ENTER\n");
+
+ netif_stop_queue (dev);
+
+ DPRINTK ("%s: Shutting down ethercard, status was 0x%4.4x.\n",
+ dev->name, readw (ioaddr + IntrStatus));
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ RTL_W16 (IntrMask, 0x0000);
+
+ /* Stop the chip's Tx and Rx DMA processes. */
+ RTL_W8 (ChipCmd, 0x00);
+
+ /* Update the error counts. */
+ tp->stats.rx_missed_errors += RTL_R32 (RxMissed);
+ RTL_W32 (RxMissed, 0);
+
+ del_timer (&tp->timer);
+
+ free_irq (dev->irq, dev);
+
+ for (i = 0; i < NUM_TX_DESC; i++) {
+ struct sk_buff *skb = tp->tx_info[i].skb;
+ dma_addr_t mapping = tp->tx_info[i].mapping;
+
+ if (skb) {
+ if (mapping)
+ pci_unmap_single (tp->pci_dev, mapping, skb->len);
+ dev_kfree_skb (skb);
+ }
+ tp->tx_info[i].skb = NULL;
+ tp->tx_info[i].mapping = 0;
+ }
+
+ pci_free_consistent(tp->pci_dev, RX_BUF_LEN + 16,
+ tp->rx_ring, tp->rx_ring_dma);
+ pci_free_consistent(tp->pci_dev, TX_BUF_SIZE * NUM_TX_DESC,
+ tp->tx_bufs, tp->tx_bufs_dma);
+ tp->rx_ring = NULL;
+ tp->tx_bufs = NULL;
+
+ /* Green! Put the chip in low-power mode. */
+ RTL_W8 (Cfg9346, 0xC0);
+ RTL_W8 (Config1, 0x03);
+ RTL_W8 (HltClk, 'H'); /* 'R' would leave the clock running. */
+
+ MOD_DEC_USE_COUNT;
+
+ DPRINTK ("EXIT\n");
+ return 0;
+}
+
+static int mii_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ u16 *data = (u16 *) & rq->ifr_data;
+
+ DPRINTK ("ENTER\n");
+
+ switch (cmd) {
+ case SIOCDEVPRIVATE: /* Get the address of the PHY in use. */
+ data[0] = tp->phys[0] & 0x3f;
+ /* Fall Through */
+ case SIOCDEVPRIVATE + 1: /* Read the specified MII register. */
+ data[3] = mdio_read (dev, data[0], data[1] & 0x1f);
+ DPRINTK ("EXIT\n");
+ return 0;
+ case SIOCDEVPRIVATE + 2: /* Write the specified MII register */
+ if (!capable (CAP_NET_ADMIN))
+ return -EPERM;
+ mdio_write (dev, data[0], data[1] & 0x1f, data[2]);
+ DPRINTK ("EXIT\n");
+ return 0;
+ default:
+ DPRINTK ("EXIT\n");
+ return -EOPNOTSUPP;
+ }
+
+ DPRINTK ("EXIT\n");
+}
+
+static struct net_device_stats *rtl8139_get_stats (struct net_device *dev)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+
+ DPRINTK ("ENTER\n");
+
+ assert (tp != NULL);
+
+ if (test_bit(LINK_STATE_START, &dev->state)) {
+ tp->stats.rx_missed_errors += RTL_R32 (RxMissed);
+ RTL_W32 (RxMissed, 0);
+ }
+
+ DPRINTK ("EXIT\n");
+ return &tp->stats;
+}
+
+/* Set or clear the multicast filter for this adaptor.
+ This routine is not state sensitive and need not be SMP locked. */
+
+static unsigned const ethernet_polynomial = 0x04c11db7U;
+static inline u32 ether_crc (int length, unsigned char *data)
+{
+ int crc = -1;
+
+ DPRINTK ("ENTER\n");
+
+ while (--length >= 0) {
+ unsigned char current_octet = *data++;
+ int bit;
+ for (bit = 0; bit < 8; bit++, current_octet >>= 1)
+ crc = (crc << 1) ^
+ ((crc < 0) ^ (current_octet & 1) ?
+ ethernet_polynomial : 0);
+ }
+
+ DPRINTK ("EXIT\n");
+ return crc;
+}
+
+static void rtl8139_set_rx_mode (struct net_device *dev)
+{
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+ u32 mc_filter[2]; /* Multicast hash filter */
+ int i, rx_mode;
+
+ DPRINTK ("ENTER\n");
+
+ DPRINTK ("%s: rtl8139_set_rx_mode(%4.4x) done -- Rx config %8.8x.\n",
+ dev->name, dev->flags, readl (ioaddr + RxConfig));
+
+ /* Note: do not reorder, GCC is clever about common statements. */
+ if (dev->flags & IFF_PROMISC) {
+ /* Unconditionally log net taps. */
+ printk (KERN_NOTICE "%s: Promiscuous mode enabled.\n",
+ dev->name);
+ rx_mode =
+ AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
+ AcceptAllPhys;
+ mc_filter[1] = mc_filter[0] = 0xffffffff;
+ } else if ((dev->mc_count > multicast_filter_limit)
+ || (dev->flags & IFF_ALLMULTI)) {
+ /* Too many to filter perfectly -- accept all multicasts. */
+ rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
+ mc_filter[1] = mc_filter[0] = 0xffffffff;
+ } else {
+ struct dev_mc_list *mclist;
+ rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
+ mc_filter[1] = mc_filter[0] = 0;
+ for (i = 0, mclist = dev->mc_list;
+ mclist && i < dev->mc_count;
+ i++, mclist =
+ mclist->next) set_bit (ether_crc (ETH_ALEN,
+ mclist->
+ dmi_addr) >> 26,
+ mc_filter);
+ }
+ /* We can safely update without stopping the chip. */
+ RTL_W32 (RxConfig, tp->rx_config | rx_mode);
+ RTL_W32 (MAR0 + 0, mc_filter[0]);
+ RTL_W32 (MAR0 + 4, mc_filter[1]);
+
+ DPRINTK ("EXIT\n");
+}
+
+
+static void rtl8139_suspend (struct pci_dev *pdev)
+{
+ struct net_device *dev = PCI_GET_DRIVER_DATA (pdev);
+ struct rtl8139_private *tp = (struct rtl8139_private *) dev->priv;
+ void *ioaddr = tp->mmio_addr;
+
+ netif_stop_queue (dev);
+
+ /* Disable interrupts, stop Tx and Rx. */
+ RTL_W16 (IntrMask, 0x0000);
+ RTL_W8 (ChipCmd, 0x00);
+
+ /* Update the error counts. */
+ tp->stats.rx_missed_errors += RTL_R32 (RxMissed);
+ RTL_W32 (RxMissed, 0);
+}
+
+
+static void rtl8139_resume (struct pci_dev *pdev)
+{
+ struct net_device *dev = PCI_GET_DRIVER_DATA (pdev);
+
+ rtl8139_hw_start(dev);
+}
+
+
+static struct pci_driver rtl8139_pci_driver = {
+ name: RTL8139_MODULE_NAME,
+ id_table: rtl8139_pci_tbl,
+ probe: rtl8139_init_one,
+ remove: rtl8139_remove_one,
+ suspend: rtl8139_suspend,
+ resume: rtl8139_resume,
+};
+
+
+static int __init rtl8139_init_module (void)
+{
+ int rc;
+
+ DPRINTK ("ENTER\n");
+
+ rc = pci_register_driver (&rtl8139_pci_driver);
+
+ if (rc > 0) {
+ printk (KERN_INFO RTL8139_DRIVER_NAME
+ " loaded (%d device%s registered)\n",
+ rc, rc > 1 ? "s" : "");
+ }
+
+ DPRINTK ("EXIT\n");
+ return rc > 0 ? 0 : -ENODEV;
+}
+
+
+static void __exit rtl8139_cleanup_module (void)
+{
+ pci_unregister_driver (&rtl8139_pci_driver);
+}
+
+
+module_init(rtl8139_init_module);
+module_exit(rtl8139_cleanup_module);
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)