via-rhine.c
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- /* via-rhine.c: A Linux Ethernet device driver for VIA Rhine family chips. */
- /*
- Written 1998-2001 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 designed for the VIA VT86c100A Rhine-II PCI Fast Ethernet
- controller. It also works with the older 3043 Rhine-I chip.
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
- This driver contains some changes from the original Donald Becker
- version. He may or may not be interested in bug reports on this
- code. You can find his versions at:
- http://www.scyld.com/network/via-rhine.html
- Linux kernel version history:
-
- LK1.1.0:
- - Jeff Garzik: softnet 'n stuff
-
- LK1.1.1:
- - Justin Guyett: softnet and locking fixes
- - Jeff Garzik: use PCI interface
- LK1.1.2:
- - Urban Widmark: minor cleanups, merges from Becker 1.03a/1.04 versions
- LK1.1.3:
- - Urban Widmark: use PCI DMA interface (with thanks to the eepro100.c
- code) update "Theory of Operation" with
- softnet/locking changes
- - Dave Miller: PCI DMA and endian fixups
- - Jeff Garzik: MOD_xxx race fixes, updated PCI resource allocation
- LK1.1.4:
- - Urban Widmark: fix gcc 2.95.2 problem and
- remove writel's to fixed address 0x7c
- LK1.1.5:
- - Urban Widmark: mdio locking, bounce buffer changes
- merges from Beckers 1.05 version
- added netif_running_on/off support
- LK1.1.6:
- - Urban Widmark: merges from Beckers 1.08b version (VT6102 + mdio)
- set netif_running_on/off on startup, del_timer_sync
-
- LK1.1.7:
- - Manfred Spraul: added reset into tx_timeout
- LK1.1.9:
- - Urban Widmark: merges from Beckers 1.10 version
- (media selection + eeprom reload)
- - David Vrabel: merges from D-Link "1.11" version
- (disable WOL and PME on startup)
- LK1.1.10:
- - Manfred Spraul: use "singlecopy" for unaligned buffers
- don't allocate bounce buffers for !ReqTxAlign cards
- LK1.1.11:
- - David Woodhouse: Set dev->base_addr before the first time we call
- wait_for_reset(). It's a lot happier that way.
- Free np->tx_bufs only if we actually allocated it.
- LK1.1.12:
- - Martin Eriksson: Allow Memory-Mapped IO to be enabled.
- LK1.1.13 (jgarzik):
- - Add ethtool support
- - Replace some MII-related magic numbers with constants
-
- */
- #define DRV_NAME "via-rhine"
- #define DRV_VERSION "1.1.13"
- #define DRV_RELDATE "Nov-17-2001"
- /* A few user-configurable values.
- These may be modified when a driver module is loaded. */
- static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
- static int max_interrupt_work = 20;
- /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
- Setting to > 1518 effectively disables this feature. */
- static int rx_copybreak;
- /* Used to pass the media type, etc.
- Both 'options[]' and 'full_duplex[]' should exist for driver
- interoperability.
- The media type is usually passed in 'options[]'.
- The default is autonegotation for speed and duplex.
- This should rarely be overridden.
- Use option values 0x10/0x20 for 10Mbps, 0x100,0x200 for 100Mbps.
- Use option values 0x10 and 0x100 for forcing half duplex fixed speed.
- Use option values 0x20 and 0x200 for forcing full duplex operation.
- */
- #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};
- /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
- The Rhine has a 64 element 8390-like hash table. */
- static const int multicast_filter_limit = 32;
- /* Operational parameters that are set at compile time. */
- /* Keep the ring sizes a power of two for compile efficiency.
- The compiler will convert <unsigned>'%'<2^N> into a bit mask.
- Making the Tx ring too large decreases the effectiveness of channel
- bonding and packet priority.
- There are no ill effects from too-large receive rings. */
- #define TX_RING_SIZE 16
- #define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */
- #define RX_RING_SIZE 16
- /* 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.*/
- /* max time out delay time */
- #define W_MAX_TIMEOUT 0x0FFFU
- #if !defined(__OPTIMIZE__) || !defined(__KERNEL__)
- #warning You must compile this file with the correct options!
- #warning See the last lines of the source file.
- #error You must compile this driver with "-O".
- #endif
- #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/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #include <linux/init.h>
- #include <linux/delay.h>
- #include <linux/mii.h>
- #include <linux/ethtool.h>
- #include <asm/processor.h> /* Processor type for cache alignment. */
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include <asm/uaccess.h>
- /* These identify the driver base version and may not be removed. */
- static char version[] __devinitdata =
- KERN_INFO DRV_NAME ".c:v1.10-LK" DRV_VERSION " " DRV_RELDATE " Written by Donald Beckern"
- KERN_INFO " http://www.scyld.com/network/via-rhine.htmln";
- static char shortname[] = DRV_NAME;
- /* This driver was written to use PCI memory space, however most versions
- of the Rhine only work correctly with I/O space accesses. */
- #ifdef CONFIG_VIA_RHINE_MMIO
- #define USE_MEM
- #else
- #define USE_IO
- #undef readb
- #undef readw
- #undef readl
- #undef writeb
- #undef writew
- #undef writel
- #define readb inb
- #define readw inw
- #define readl inl
- #define writeb outb
- #define writew outw
- #define writel outl
- #endif
- MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
- MODULE_DESCRIPTION("VIA Rhine PCI Fast Ethernet driver");
- MODULE_LICENSE("GPL");
- MODULE_PARM(max_interrupt_work, "i");
- MODULE_PARM(debug, "i");
- MODULE_PARM(rx_copybreak, "i");
- MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
- MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
- MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt");
- MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)");
- MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
- MODULE_PARM_DESC(options, "VIA Rhine: Bits 0-3: media type, bit 17: full duplex");
- MODULE_PARM_DESC(full_duplex, "VIA Rhine full duplex setting(s) (1)");
- /*
- Theory of Operation
- I. Board Compatibility
- This driver is designed for the VIA 86c100A Rhine-II PCI Fast Ethernet
- controller.
- II. Board-specific settings
- Boards with this chip are functional only in a bus-master PCI slot.
- Many operational settings are loaded from the EEPROM to the Config word at
- offset 0x78. This driver assumes that they are correct.
- If this driver is compiled to use PCI memory space operations the EEPROM
- must be configured to enable memory ops.
- III. Driver operation
- IIIa. Ring buffers
- This driver uses two statically allocated fixed-size descriptor lists
- formed into rings by a branch from the final descriptor to the beginning of
- the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
- IIIb/c. Transmit/Receive Structure
- This driver attempts to use a zero-copy receive and transmit scheme.
- Alas, all data buffers are required to start on a 32 bit boundary, so
- the driver must often copy transmit packets into bounce buffers.
- The driver allocates full frame size skbuffs for the Rx ring buffers at
- open() time and passes the skb->data field to the chip as receive data
- buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
- a fresh skbuff is allocated and the frame is copied to the new skbuff.
- When the incoming frame is larger, the skbuff is passed directly up the
- protocol stack. Buffers consumed this way are replaced by newly allocated
- skbuffs in the last phase of via_rhine_rx().
- The RX_COPYBREAK value is chosen to trade-off the memory wasted by
- using a full-sized skbuff for small frames vs. the copying costs of larger
- frames. New boards are typically used in generously configured machines
- and the underfilled buffers have negligible impact compared to the benefit of
- a single allocation size, so the default value of zero results in never
- copying packets. When copying is done, the cost is usually mitigated by using
- a combined copy/checksum routine. Copying also preloads the cache, which is
- most useful with small frames.
- Since the VIA chips are only able to transfer data to buffers on 32 bit
- boundaries, the IP header at offset 14 in an ethernet frame isn't
- longword aligned for further processing. Copying these unaligned buffers
- has the beneficial effect of 16-byte aligning the IP header.
- IIId. Synchronization
- The driver runs as two independent, single-threaded flows of control. One
- is the send-packet routine, which enforces single-threaded use by the
- dev->priv->lock spinlock. The other thread is the interrupt handler, which
- is single threaded by the hardware and interrupt handling software.
- The send packet thread has partial control over the Tx ring. It locks the
- dev->priv->lock whenever it's queuing a Tx packet. If the next slot in the ring
- is not available it stops the transmit queue by calling netif_stop_queue.
- 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. If at least half of the entries in
- the Rx ring are available the transmit queue is woken up if it was stopped.
- IV. Notes
- IVb. References
- Preliminary VT86C100A manual from http://www.via.com.tw/
- http://www.scyld.com/expert/100mbps.html
- http://www.scyld.com/expert/NWay.html
- ftp://ftp.via.com.tw/public/lan/Products/NIC/VT86C100A/Datasheet/VT86C100A03.pdf
- ftp://ftp.via.com.tw/public/lan/Products/NIC/VT6102/Datasheet/VT6102_021.PDF
- IVc. Errata
- The VT86C100A manual is not reliable information.
- The 3043 chip does not handle unaligned transmit or receive buffers, resulting
- in significant performance degradation for bounce buffer copies on transmit
- and unaligned IP headers on receive.
- The chip does not pad to minimum transmit length.
- */
- /* This table drives the PCI probe routines. It's mostly boilerplate in all
- of the drivers, and will likely be provided by some future kernel.
- Note the matching code -- the first table entry matchs all 56** cards but
- second only the 1234 card.
- */
- enum pci_flags_bit {
- PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4,
- PCI_ADDR0=0x10<<0, PCI_ADDR1=0x10<<1, PCI_ADDR2=0x10<<2, PCI_ADDR3=0x10<<3,
- };
- enum via_rhine_chips {
- VT86C100A = 0,
- VT6102,
- VT3043,
- };
- struct via_rhine_chip_info {
- const char *name;
- u16 pci_flags;
- int io_size;
- int drv_flags;
- };
- enum chip_capability_flags {
- CanHaveMII=1, HasESIPhy=2, HasDavicomPhy=4,
- ReqTxAlign=0x10, HasWOL=0x20, };
- #ifdef USE_MEM
- #define RHINE_IOTYPE (PCI_USES_MEM | PCI_USES_MASTER | PCI_ADDR1)
- #else
- #define RHINE_IOTYPE (PCI_USES_IO | PCI_USES_MASTER | PCI_ADDR0)
- #endif
- /* directly indexed by enum via_rhine_chips, above */
- static struct via_rhine_chip_info via_rhine_chip_info[] __devinitdata =
- {
- { "VIA VT86C100A Rhine", RHINE_IOTYPE, 128,
- CanHaveMII | ReqTxAlign },
- { "VIA VT6102 Rhine-II", RHINE_IOTYPE, 256,
- CanHaveMII | HasWOL },
- { "VIA VT3043 Rhine", RHINE_IOTYPE, 128,
- CanHaveMII | ReqTxAlign }
- };
- static struct pci_device_id via_rhine_pci_tbl[] __devinitdata =
- {
- {0x1106, 0x6100, PCI_ANY_ID, PCI_ANY_ID, 0, 0, VT86C100A},
- {0x1106, 0x3065, PCI_ANY_ID, PCI_ANY_ID, 0, 0, VT6102},
- {0x1106, 0x3043, PCI_ANY_ID, PCI_ANY_ID, 0, 0, VT3043},
- {0,} /* terminate list */
- };
- MODULE_DEVICE_TABLE(pci, via_rhine_pci_tbl);
- /* Offsets to the device registers. */
- enum register_offsets {
- StationAddr=0x00, RxConfig=0x06, TxConfig=0x07, ChipCmd=0x08,
- IntrStatus=0x0C, IntrEnable=0x0E,
- MulticastFilter0=0x10, MulticastFilter1=0x14,
- RxRingPtr=0x18, TxRingPtr=0x1C, GFIFOTest=0x54,
- MIIPhyAddr=0x6C, MIIStatus=0x6D, PCIBusConfig=0x6E,
- MIICmd=0x70, MIIRegAddr=0x71, MIIData=0x72, MACRegEEcsr=0x74,
- ConfigA=0x78, ConfigB=0x79, ConfigC=0x7A, ConfigD=0x7B,
- RxMissed=0x7C, RxCRCErrs=0x7E,
- StickyHW=0x83, WOLcrClr=0xA4, WOLcgClr=0xA7, PwrcsrClr=0xAC,
- };
- #ifdef USE_MEM
- /* Registers we check that mmio and reg are the same. */
- int mmio_verify_registers[] = {
- RxConfig, TxConfig, IntrEnable, ConfigA, ConfigB, ConfigC, ConfigD,
- 0
- };
- #endif
- /* Bits in the interrupt status/mask registers. */
- enum intr_status_bits {
- IntrRxDone=0x0001, IntrRxErr=0x0004, IntrRxEmpty=0x0020,
- IntrTxDone=0x0002, IntrTxAbort=0x0008, IntrTxUnderrun=0x0010,
- IntrPCIErr=0x0040,
- IntrStatsMax=0x0080, IntrRxEarly=0x0100, IntrMIIChange=0x0200,
- IntrRxOverflow=0x0400, IntrRxDropped=0x0800, IntrRxNoBuf=0x1000,
- IntrTxAborted=0x2000, IntrLinkChange=0x4000,
- IntrRxWakeUp=0x8000,
- IntrNormalSummary=0x0003, IntrAbnormalSummary=0xC260,
- };
- /* MII interface, status flags.
- Not to be confused with the MIIStatus register ... */
- enum mii_status_bits {
- MIICap100T4 = 0x8000,
- MIICap10100HdFd = 0x7800,
- MIIPreambleSupr = 0x0040,
- MIIAutoNegCompleted = 0x0020,
- MIIRemoteFault = 0x0010,
- MIICapAutoNeg = 0x0008,
- MIILink = 0x0004,
- MIIJabber = 0x0002,
- MIIExtended = 0x0001
- };
- /* The Rx and Tx buffer descriptors. */
- struct rx_desc {
- s32 rx_status;
- u32 desc_length;
- u32 addr;
- u32 next_desc;
- };
- struct tx_desc {
- s32 tx_status;
- u32 desc_length;
- u32 addr;
- u32 next_desc;
- };
- /* Bits in *_desc.status */
- enum rx_status_bits {
- RxOK=0x8000, RxWholePkt=0x0300, RxErr=0x008F
- };
- enum desc_status_bits {
- DescOwn=0x80000000, DescEndPacket=0x4000, DescIntr=0x1000,
- };
- /* Bits in ChipCmd. */
- enum chip_cmd_bits {
- CmdInit=0x0001, CmdStart=0x0002, CmdStop=0x0004, CmdRxOn=0x0008,
- CmdTxOn=0x0010, CmdTxDemand=0x0020, CmdRxDemand=0x0040,
- CmdEarlyRx=0x0100, CmdEarlyTx=0x0200, CmdFDuplex=0x0400,
- CmdNoTxPoll=0x0800, CmdReset=0x8000,
- };
- #define MAX_MII_CNT 4
- struct netdev_private {
- /* Descriptor rings */
- struct rx_desc *rx_ring;
- struct tx_desc *tx_ring;
- dma_addr_t rx_ring_dma;
- dma_addr_t tx_ring_dma;
- /* The addresses of receive-in-place skbuffs. */
- struct sk_buff *rx_skbuff[RX_RING_SIZE];
- dma_addr_t rx_skbuff_dma[RX_RING_SIZE];
- /* The saved address of a sent-in-place packet/buffer, for later free(). */
- struct sk_buff *tx_skbuff[TX_RING_SIZE];
- dma_addr_t tx_skbuff_dma[TX_RING_SIZE];
- /* Tx bounce buffers */
- unsigned char *tx_buf[TX_RING_SIZE];
- unsigned char *tx_bufs;
- dma_addr_t tx_bufs_dma;
- struct pci_dev *pdev;
- struct net_device_stats stats;
- struct timer_list timer; /* Media monitoring timer. */
- spinlock_t lock;
- /* Frequently used values: keep some adjacent for cache effect. */
- int chip_id, drv_flags;
- struct rx_desc *rx_head_desc;
- unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
- unsigned int cur_tx, dirty_tx;
- unsigned int rx_buf_sz; /* Based on MTU+slack. */
- u16 chip_cmd; /* Current setting for ChipCmd */
- /* These values are keep track of the transceiver/media in use. */
- unsigned int full_duplex:1; /* Full-duplex operation requested. */
- unsigned int duplex_lock:1;
- unsigned int default_port:4; /* Last dev->if_port value. */
- u8 tx_thresh, rx_thresh;
- /* MII transceiver section. */
- u16 advertising; /* NWay media advertisement */
- unsigned char phys[MAX_MII_CNT]; /* MII device addresses. */
- unsigned int mii_cnt; /* number of MIIs found, but only the first one is used */
- u16 mii_status; /* last read MII status */
- struct mii_if_info mii_if;
- };
- static int mdio_read(struct net_device *dev, int phy_id, int location);
- static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
- static int via_rhine_open(struct net_device *dev);
- static void via_rhine_check_duplex(struct net_device *dev);
- static void via_rhine_timer(unsigned long data);
- static void via_rhine_tx_timeout(struct net_device *dev);
- static int via_rhine_start_tx(struct sk_buff *skb, struct net_device *dev);
- static void via_rhine_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
- static void via_rhine_tx(struct net_device *dev);
- static void via_rhine_rx(struct net_device *dev);
- static void via_rhine_error(struct net_device *dev, int intr_status);
- static void via_rhine_set_rx_mode(struct net_device *dev);
- static struct net_device_stats *via_rhine_get_stats(struct net_device *dev);
- static int via_rhine_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
- static int via_rhine_close(struct net_device *dev);
- static inline void clear_tally_counters(long ioaddr);
- static void wait_for_reset(struct net_device *dev, char *name)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int chip_id = np->chip_id;
- int i;
- /* 3043 may need long delay after reset (dlink) */
- if (chip_id == VT3043 || chip_id == VT86C100A)
- udelay(100);
- i = 0;
- do {
- udelay(5);
- i++;
- if(i > 2000) {
- printk(KERN_ERR "%s: reset did not complete in 10 ms.n", name);
- break;
- }
- } while(readw(ioaddr + ChipCmd) & CmdReset);
- if (debug > 1)
- printk(KERN_INFO "%s: reset finished after %d microseconds.n",
- name, 5*i);
- }
- #ifdef USE_MEM
- static void __devinit enable_mmio(long ioaddr, int chip_id)
- {
- int n;
- if (chip_id == VT3043 || chip_id == VT86C100A) {
- /* More recent docs say that this bit is reserved ... */
- n = inb(ioaddr + ConfigA) | 0x20;
- outb(n, ioaddr + ConfigA);
- } else if (chip_id == VT6102) {
- n = inb(ioaddr + ConfigD) | 0x80;
- outb(n, ioaddr + ConfigD);
- }
- }
- #endif
- static void __devinit reload_eeprom(long ioaddr)
- {
- int i;
- outb(0x20, ioaddr + MACRegEEcsr);
- /* Typically 2 cycles to reload. */
- for (i = 0; i < 150; i++)
- if (! (inb(ioaddr + MACRegEEcsr) & 0x20))
- break;
- }
- static int __devinit via_rhine_init_one (struct pci_dev *pdev,
- const struct pci_device_id *ent)
- {
- struct net_device *dev;
- struct netdev_private *np;
- int i, option;
- int chip_id = (int) ent->driver_data;
- static int card_idx = -1;
- long ioaddr;
- long memaddr;
- int io_size;
- int pci_flags;
- #ifdef USE_MEM
- long ioaddr0;
- #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
- card_idx++;
- option = card_idx < MAX_UNITS ? options[card_idx] : 0;
- io_size = via_rhine_chip_info[chip_id].io_size;
- pci_flags = via_rhine_chip_info[chip_id].pci_flags;
- if (pci_enable_device (pdev))
- goto err_out;
- /* this should always be supported */
- if (pci_set_dma_mask(pdev, 0xffffffff)) {
- printk(KERN_ERR "32-bit PCI DMA addresses not supported by the card!?n");
- goto err_out;
- }
-
- /* sanity check */
- if ((pci_resource_len (pdev, 0) < io_size) ||
- (pci_resource_len (pdev, 1) < io_size)) {
- printk (KERN_ERR "Insufficient PCI resources, abortingn");
- goto err_out;
- }
- ioaddr = pci_resource_start (pdev, 0);
- memaddr = pci_resource_start (pdev, 1);
- if (pci_flags & PCI_USES_MASTER)
- pci_set_master (pdev);
- dev = alloc_etherdev(sizeof(*np));
- if (dev == NULL) {
- printk (KERN_ERR "init_ethernet failed for card #%dn", card_idx);
- goto err_out;
- }
- SET_MODULE_OWNER(dev);
-
- if (pci_request_regions(pdev, shortname))
- goto err_out_free_netdev;
- #ifdef USE_MEM
- ioaddr0 = ioaddr;
- enable_mmio(ioaddr0, chip_id);
- ioaddr = (long) ioremap (memaddr, io_size);
- if (!ioaddr) {
- printk (KERN_ERR "ioremap failed for device %s, region 0x%X @ 0x%lXn",
- pdev->slot_name, io_size, memaddr);
- goto err_out_free_res;
- }
- /* Check that selected MMIO registers match the PIO ones */
- i = 0;
- while (mmio_verify_registers[i]) {
- int reg = mmio_verify_registers[i++];
- unsigned char a = inb(ioaddr0+reg);
- unsigned char b = readb(ioaddr+reg);
- if (a != b) {
- printk (KERN_ERR "MMIO do not match PIO [%02x] (%02x != %02x)n",
- reg, a, b);
- goto err_out_unmap;
- }
- }
- #endif
- /* D-Link provided reset code (with comment additions) */
- if (via_rhine_chip_info[chip_id].drv_flags & HasWOL) {
- unsigned char byOrgValue;
- /* clear sticky bit before reset & read ethernet address */
- byOrgValue = readb(ioaddr + StickyHW);
- byOrgValue = byOrgValue & 0xFC;
- writeb(byOrgValue, ioaddr + StickyHW);
- /* (bits written are cleared?) */
- /* disable force PME-enable */
- writeb(0x80, ioaddr + WOLcgClr);
- /* disable power-event config bit */
- writeb(0xFF, ioaddr + WOLcrClr);
- /* clear power status (undocumented in vt6102 docs?) */
- writeb(0xFF, ioaddr + PwrcsrClr);
- }
- /* Reset the chip to erase previous misconfiguration. */
- writew(CmdReset, ioaddr + ChipCmd);
- dev->base_addr = ioaddr;
- wait_for_reset(dev, shortname);
- /* Reload the station address from the EEPROM. */
- #ifdef USE_IO
- reload_eeprom(ioaddr);
- #else
- reload_eeprom(ioaddr0);
- /* Reloading from eeprom overwrites cfgA-D, so we must re-enable MMIO.
- If reload_eeprom() was done first this could be avoided, but it is
- not known if that still works with the "win98-reboot" problem. */
- enable_mmio(ioaddr0, chip_id);
- #endif
- for (i = 0; i < 6; i++)
- dev->dev_addr[i] = readb(ioaddr + StationAddr + i);
- if (!is_valid_ether_addr(dev->dev_addr)) {
- printk(KERN_ERR "Invalid MAC address for card #%dn", card_idx);
- goto err_out_unmap;
- }
- if (chip_id == VT6102) {
- /*
- * for 3065D, EEPROM reloaded will cause bit 0 in MAC_REG_CFGA
- * turned on. it makes MAC receive magic packet
- * automatically. So, we turn it off. (D-Link)
- */
- writeb(readb(ioaddr + ConfigA) & 0xFE, ioaddr + ConfigA);
- }
- dev->irq = pdev->irq;
- np = dev->priv;
- spin_lock_init (&np->lock);
- np->chip_id = chip_id;
- np->drv_flags = via_rhine_chip_info[chip_id].drv_flags;
- np->pdev = pdev;
- np->mii_if.dev = dev;
- np->mii_if.mdio_read = mdio_read;
- np->mii_if.mdio_write = mdio_write;
- if (dev->mem_start)
- option = dev->mem_start;
- /* The lower four bits are the media type. */
- if (option > 0) {
- if (option & 0x200)
- np->mii_if.full_duplex = 1;
- np->default_port = option & 15;
- }
- if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
- np->mii_if.full_duplex = 1;
- if (np->mii_if.full_duplex) {
- printk(KERN_INFO "%s: Set to forced full duplex, autonegotiation"
- " disabled.n", dev->name);
- np->mii_if.duplex_lock = 1;
- }
- /* The chip-specific entries in the device structure. */
- dev->open = via_rhine_open;
- dev->hard_start_xmit = via_rhine_start_tx;
- dev->stop = via_rhine_close;
- dev->get_stats = via_rhine_get_stats;
- dev->set_multicast_list = via_rhine_set_rx_mode;
- dev->do_ioctl = via_rhine_ioctl;
- dev->tx_timeout = via_rhine_tx_timeout;
- dev->watchdog_timeo = TX_TIMEOUT;
- if (np->drv_flags & ReqTxAlign)
- dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM;
-
- i = register_netdev(dev);
- if (i)
- goto err_out_unmap;
- printk(KERN_INFO "%s: %s at 0x%lx, ",
- dev->name, via_rhine_chip_info[chip_id].name,
- (pci_flags & PCI_USES_IO) ? ioaddr : memaddr);
- for (i = 0; i < 5; i++)
- printk("%2.2x:", dev->dev_addr[i]);
- printk("%2.2x, IRQ %d.n", dev->dev_addr[i], pdev->irq);
- pci_set_drvdata(pdev, dev);
- if (np->drv_flags & CanHaveMII) {
- int phy, phy_idx = 0;
- np->phys[0] = 1; /* Standard for this chip. */
- for (phy = 1; phy < 32 && phy_idx < MAX_MII_CNT; phy++) {
- int mii_status = mdio_read(dev, phy, 1);
- if (mii_status != 0xffff && mii_status != 0x0000) {
- np->phys[phy_idx++] = phy;
- np->mii_if.advertising = mdio_read(dev, phy, 4);
- printk(KERN_INFO "%s: MII PHY found at address %d, status "
- "0x%4.4x advertising %4.4x Link %4.4x.n",
- dev->name, phy, mii_status, np->mii_if.advertising,
- mdio_read(dev, phy, 5));
- /* set IFF_RUNNING */
- if (mii_status & MIILink)
- netif_carrier_on(dev);
- else
- netif_carrier_off(dev);
- }
- }
- np->mii_cnt = phy_idx;
- np->mii_if.phy_id = np->phys[0];
- }
- /* Allow forcing the media type. */
- if (option > 0) {
- if (option & 0x220)
- np->mii_if.full_duplex = 1;
- np->default_port = option & 0x3ff;
- if (np->default_port & 0x330) {
- /* FIXME: shouldn't someone check this variable? */
- /* np->medialock = 1; */
- printk(KERN_INFO " Forcing %dMbs %s-duplex operation.n",
- (option & 0x300 ? 100 : 10),
- (option & 0x220 ? "full" : "half"));
- if (np->mii_cnt)
- mdio_write(dev, np->phys[0], 0,
- ((option & 0x300) ? 0x2000 : 0) | /* 100mbps? */
- ((option & 0x220) ? 0x0100 : 0)); /* Full duplex? */
- }
- }
- return 0;
- err_out_unmap:
- #ifdef USE_MEM
- iounmap((void *)ioaddr);
- err_out_free_res:
- #endif
- pci_release_regions(pdev);
- err_out_free_netdev:
- kfree (dev);
- err_out:
- return -ENODEV;
- }
- static int alloc_ring(struct net_device* dev)
- {
- struct netdev_private *np = dev->priv;
- void *ring;
- dma_addr_t ring_dma;
- ring = pci_alloc_consistent(np->pdev,
- RX_RING_SIZE * sizeof(struct rx_desc) +
- TX_RING_SIZE * sizeof(struct tx_desc),
- &ring_dma);
- if (!ring) {
- printk(KERN_ERR "Could not allocate DMA memory.n");
- return -ENOMEM;
- }
- if (np->drv_flags & ReqTxAlign) {
- np->tx_bufs = pci_alloc_consistent(np->pdev, PKT_BUF_SZ * TX_RING_SIZE,
- &np->tx_bufs_dma);
- if (np->tx_bufs == NULL) {
- pci_free_consistent(np->pdev,
- RX_RING_SIZE * sizeof(struct rx_desc) +
- TX_RING_SIZE * sizeof(struct tx_desc),
- ring, ring_dma);
- return -ENOMEM;
- }
- }
- np->rx_ring = ring;
- np->tx_ring = ring + RX_RING_SIZE * sizeof(struct rx_desc);
- np->rx_ring_dma = ring_dma;
- np->tx_ring_dma = ring_dma + RX_RING_SIZE * sizeof(struct rx_desc);
- return 0;
- }
- void free_ring(struct net_device* dev)
- {
- struct netdev_private *np = dev->priv;
- pci_free_consistent(np->pdev,
- RX_RING_SIZE * sizeof(struct rx_desc) +
- TX_RING_SIZE * sizeof(struct tx_desc),
- np->rx_ring, np->rx_ring_dma);
- np->tx_ring = NULL;
- if (np->tx_bufs)
- pci_free_consistent(np->pdev, PKT_BUF_SZ * TX_RING_SIZE,
- np->tx_bufs, np->tx_bufs_dma);
- np->tx_bufs = NULL;
- }
- static void alloc_rbufs(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- dma_addr_t next;
- int i;
- np->dirty_rx = np->cur_rx = 0;
- np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
- np->rx_head_desc = &np->rx_ring[0];
- next = np->rx_ring_dma;
-
- /* Init the ring entries */
- for (i = 0; i < RX_RING_SIZE; i++) {
- np->rx_ring[i].rx_status = 0;
- np->rx_ring[i].desc_length = cpu_to_le32(np->rx_buf_sz);
- next += sizeof(struct rx_desc);
- np->rx_ring[i].next_desc = cpu_to_le32(next);
- np->rx_skbuff[i] = 0;
- }
- /* Mark the last entry as wrapping the ring. */
- np->rx_ring[i-1].next_desc = cpu_to_le32(np->rx_ring_dma);
- /* Fill in the Rx buffers. Handle allocation failure gracefully. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
- np->rx_skbuff[i] = skb;
- if (skb == NULL)
- break;
- skb->dev = dev; /* Mark as being used by this device. */
- np->rx_skbuff_dma[i] =
- pci_map_single(np->pdev, skb->tail, np->rx_buf_sz,
- PCI_DMA_FROMDEVICE);
- np->rx_ring[i].addr = cpu_to_le32(np->rx_skbuff_dma[i]);
- np->rx_ring[i].rx_status = cpu_to_le32(DescOwn);
- }
- np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
- }
- static void free_rbufs(struct net_device* dev)
- {
- struct netdev_private *np = dev->priv;
- int i;
- /* Free all the skbuffs in the Rx queue. */
- for (i = 0; i < RX_RING_SIZE; i++) {
- np->rx_ring[i].rx_status = 0;
- np->rx_ring[i].addr = cpu_to_le32(0xBADF00D0); /* An invalid address. */
- if (np->rx_skbuff[i]) {
- pci_unmap_single(np->pdev,
- np->rx_skbuff_dma[i],
- np->rx_buf_sz, PCI_DMA_FROMDEVICE);
- dev_kfree_skb(np->rx_skbuff[i]);
- }
- np->rx_skbuff[i] = 0;
- }
- }
- static void alloc_tbufs(struct net_device* dev)
- {
- struct netdev_private *np = dev->priv;
- dma_addr_t next;
- int i;
- np->dirty_tx = np->cur_tx = 0;
- next = np->tx_ring_dma;
- for (i = 0; i < TX_RING_SIZE; i++) {
- np->tx_skbuff[i] = 0;
- np->tx_ring[i].tx_status = 0;
- np->tx_ring[i].desc_length = cpu_to_le32(0x00e08000);
- next += sizeof(struct tx_desc);
- np->tx_ring[i].next_desc = cpu_to_le32(next);
- np->tx_buf[i] = &np->tx_bufs[i * PKT_BUF_SZ];
- }
- np->tx_ring[i-1].next_desc = cpu_to_le32(np->tx_ring_dma);
- }
- static void free_tbufs(struct net_device* dev)
- {
- struct netdev_private *np = dev->priv;
- int i;
- for (i = 0; i < TX_RING_SIZE; i++) {
- np->tx_ring[i].tx_status = 0;
- np->tx_ring[i].desc_length = cpu_to_le32(0x00e08000);
- np->tx_ring[i].addr = cpu_to_le32(0xBADF00D0); /* An invalid address. */
- if (np->tx_skbuff[i]) {
- if (np->tx_skbuff_dma[i]) {
- pci_unmap_single(np->pdev,
- np->tx_skbuff_dma[i],
- np->tx_skbuff[i]->len, PCI_DMA_TODEVICE);
- }
- dev_kfree_skb(np->tx_skbuff[i]);
- }
- np->tx_skbuff[i] = 0;
- np->tx_buf[i] = 0;
- }
- }
- static void init_registers(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int i;
- for (i = 0; i < 6; i++)
- writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
- /* Initialize other registers. */
- writew(0x0006, ioaddr + PCIBusConfig); /* Tune configuration??? */
- /* Configure the FIFO thresholds. */
- writeb(0x20, ioaddr + TxConfig); /* Initial threshold 32 bytes */
- np->tx_thresh = 0x20;
- np->rx_thresh = 0x60; /* Written in via_rhine_set_rx_mode(). */
- if (dev->if_port == 0)
- dev->if_port = np->default_port;
- writel(np->rx_ring_dma, ioaddr + RxRingPtr);
- writel(np->tx_ring_dma, ioaddr + TxRingPtr);
- via_rhine_set_rx_mode(dev);
- /* Enable interrupts by setting the interrupt mask. */
- writew(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow| IntrRxDropped|
- IntrTxDone | IntrTxAbort | IntrTxUnderrun |
- IntrPCIErr | IntrStatsMax | IntrLinkChange | IntrMIIChange,
- ioaddr + IntrEnable);
- np->chip_cmd = CmdStart|CmdTxOn|CmdRxOn|CmdNoTxPoll;
- if (np->mii_if.duplex_lock)
- np->chip_cmd |= CmdFDuplex;
- writew(np->chip_cmd, ioaddr + ChipCmd);
- via_rhine_check_duplex(dev);
- /* The LED outputs of various MII xcvrs should be configured. */
- /* For NS or Mison phys, turn on bit 1 in register 0x17 */
- /* For ESI phys, turn on bit 7 in register 0x17. */
- mdio_write(dev, np->phys[0], 0x17, mdio_read(dev, np->phys[0], 0x17) |
- (np->drv_flags & HasESIPhy) ? 0x0080 : 0x0001);
- }
- /* Read and write over the MII Management Data I/O (MDIO) interface. */
- static int mdio_read(struct net_device *dev, int phy_id, int regnum)
- {
- long ioaddr = dev->base_addr;
- int boguscnt = 1024;
- /* Wait for a previous command to complete. */
- while ((readb(ioaddr + MIICmd) & 0x60) && --boguscnt > 0)
- ;
- writeb(0x00, ioaddr + MIICmd);
- writeb(phy_id, ioaddr + MIIPhyAddr);
- writeb(regnum, ioaddr + MIIRegAddr);
- writeb(0x40, ioaddr + MIICmd); /* Trigger read */
- boguscnt = 1024;
- while ((readb(ioaddr + MIICmd) & 0x40) && --boguscnt > 0)
- ;
- return readw(ioaddr + MIIData);
- }
- static void mdio_write(struct net_device *dev, int phy_id, int regnum, int value)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int boguscnt = 1024;
- if (phy_id == np->phys[0]) {
- switch (regnum) {
- case 0: /* Is user forcing speed/duplex? */
- if (value & 0x9000) /* Autonegotiation. */
- np->mii_if.duplex_lock = 0;
- else
- np->mii_if.full_duplex = (value & 0x0100) ? 1 : 0;
- break;
- case 4:
- np->mii_if.advertising = value;
- break;
- }
- }
- /* Wait for a previous command to complete. */
- while ((readb(ioaddr + MIICmd) & 0x60) && --boguscnt > 0)
- ;
- writeb(0x00, ioaddr + MIICmd);
- writeb(phy_id, ioaddr + MIIPhyAddr);
- writeb(regnum, ioaddr + MIIRegAddr);
- writew(value, ioaddr + MIIData);
- writeb(0x20, ioaddr + MIICmd); /* Trigger write. */
- }
- static int via_rhine_open(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int i;
- /* Reset the chip. */
- writew(CmdReset, ioaddr + ChipCmd);
- i = request_irq(np->pdev->irq, &via_rhine_interrupt, SA_SHIRQ, dev->name, dev);
- if (i)
- return i;
- if (debug > 1)
- printk(KERN_DEBUG "%s: via_rhine_open() irq %d.n",
- dev->name, np->pdev->irq);
-
- i = alloc_ring(dev);
- if (i)
- return i;
- alloc_rbufs(dev);
- alloc_tbufs(dev);
- wait_for_reset(dev, dev->name);
- init_registers(dev);
- if (debug > 2)
- printk(KERN_DEBUG "%s: Done via_rhine_open(), status %4.4x "
- "MII status: %4.4x.n",
- dev->name, readw(ioaddr + ChipCmd),
- mdio_read(dev, np->phys[0], MII_BMSR));
- netif_start_queue(dev);
- /* Set the timer to check for link beat. */
- init_timer(&np->timer);
- np->timer.expires = jiffies + 2;
- np->timer.data = (unsigned long)dev;
- np->timer.function = &via_rhine_timer; /* timer handler */
- add_timer(&np->timer);
- return 0;
- }
- static void via_rhine_check_duplex(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int mii_lpa = mdio_read(dev, np->phys[0], MII_LPA);
- int negotiated = mii_lpa & np->mii_if.advertising;
- int duplex;
- if (np->mii_if.duplex_lock || mii_lpa == 0xffff)
- return;
- duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
- if (np->mii_if.full_duplex != duplex) {
- np->mii_if.full_duplex = duplex;
- if (debug)
- printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d link"
- " partner capability of %4.4x.n", dev->name,
- duplex ? "full" : "half", np->phys[0], mii_lpa);
- if (duplex)
- np->chip_cmd |= CmdFDuplex;
- else
- np->chip_cmd &= ~CmdFDuplex;
- writew(np->chip_cmd, ioaddr + ChipCmd);
- }
- }
- static void via_rhine_timer(unsigned long data)
- {
- struct net_device *dev = (struct net_device *)data;
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- int next_tick = 10*HZ;
- int mii_status;
- if (debug > 3) {
- printk(KERN_DEBUG "%s: VIA Rhine monitor tick, status %4.4x.n",
- dev->name, readw(ioaddr + IntrStatus));
- }
- spin_lock_irq (&np->lock);
- via_rhine_check_duplex(dev);
- /* make IFF_RUNNING follow the MII status bit "Link established" */
- mii_status = mdio_read(dev, np->phys[0], MII_BMSR);
- if ( (mii_status & MIILink) != (np->mii_status & MIILink) ) {
- if (mii_status & MIILink)
- netif_carrier_on(dev);
- else
- netif_carrier_off(dev);
- }
- np->mii_status = mii_status;
- spin_unlock_irq (&np->lock);
- np->timer.expires = jiffies + next_tick;
- add_timer(&np->timer);
- }
- static void via_rhine_tx_timeout (struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- printk (KERN_WARNING "%s: Transmit timed out, status %4.4x, PHY status "
- "%4.4x, resetting...n",
- dev->name, readw (ioaddr + IntrStatus),
- mdio_read (dev, np->phys[0], MII_BMSR));
- dev->if_port = 0;
- /* protect against concurrent rx interrupts */
- disable_irq(np->pdev->irq);
- spin_lock(&np->lock);
- /* Reset the chip. */
- writew(CmdReset, ioaddr + ChipCmd);
- /* clear all descriptors */
- free_tbufs(dev);
- free_rbufs(dev);
- alloc_tbufs(dev);
- alloc_rbufs(dev);
- /* Reinitialize the hardware. */
- wait_for_reset(dev, dev->name);
- init_registers(dev);
-
- spin_unlock(&np->lock);
- enable_irq(np->pdev->irq);
- dev->trans_start = jiffies;
- np->stats.tx_errors++;
- netif_wake_queue(dev);
- }
- static int via_rhine_start_tx(struct sk_buff *skb, struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- unsigned entry;
- /* Caution: the write order is important here, set the field
- with the "ownership" bits last. */
- /* Calculate the next Tx descriptor entry. */
- entry = np->cur_tx % TX_RING_SIZE;
- np->tx_skbuff[entry] = skb;
- if ((np->drv_flags & ReqTxAlign) &&
- (((long)skb->data & 3) || skb_shinfo(skb)->nr_frags != 0 || skb->ip_summed == CHECKSUM_HW)
- ) {
- /* Must use alignment buffer. */
- if (skb->len > PKT_BUF_SZ) {
- /* packet too long, drop it */
- dev_kfree_skb(skb);
- np->tx_skbuff[entry] = NULL;
- np->stats.tx_dropped++;
- return 0;
- }
- skb_copy_and_csum_dev(skb, np->tx_buf[entry]);
- np->tx_skbuff_dma[entry] = 0;
- np->tx_ring[entry].addr = cpu_to_le32(np->tx_bufs_dma +
- (np->tx_buf[entry] - np->tx_bufs));
- } else {
- np->tx_skbuff_dma[entry] =
- pci_map_single(np->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
- np->tx_ring[entry].addr = cpu_to_le32(np->tx_skbuff_dma[entry]);
- }
- np->tx_ring[entry].desc_length =
- cpu_to_le32(0x00E08000 | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN));
- /* lock eth irq */
- spin_lock_irq (&np->lock);
- wmb();
- np->tx_ring[entry].tx_status = cpu_to_le32(DescOwn);
- wmb();
- np->cur_tx++;
- /* Non-x86 Todo: explicitly flush cache lines here. */
- /* Wake the potentially-idle transmit channel. */
- writew(CmdTxDemand | np->chip_cmd, dev->base_addr + ChipCmd);
- if (np->cur_tx == np->dirty_tx + TX_QUEUE_LEN)
- netif_stop_queue(dev);
- dev->trans_start = jiffies;
- spin_unlock_irq (&np->lock);
- if (debug > 4) {
- printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.n",
- dev->name, np->cur_tx, entry);
- }
- return 0;
- }
- /* The interrupt handler does all of the Rx thread work and cleans up
- after the Tx thread. */
- static void via_rhine_interrupt(int irq, void *dev_instance, struct pt_regs *rgs)
- {
- struct net_device *dev = dev_instance;
- long ioaddr;
- u32 intr_status;
- int boguscnt = max_interrupt_work;
- ioaddr = dev->base_addr;
-
- while ((intr_status = readw(ioaddr + IntrStatus))) {
- /* Acknowledge all of the current interrupt sources ASAP. */
- writew(intr_status & 0xffff, ioaddr + IntrStatus);
- if (debug > 4)
- printk(KERN_DEBUG "%s: Interrupt, status %4.4x.n",
- dev->name, intr_status);
- if (intr_status & (IntrRxDone | IntrRxErr | IntrRxDropped |
- IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf))
- via_rhine_rx(dev);
- if (intr_status & (IntrTxDone | IntrTxAbort | IntrTxUnderrun |
- IntrTxAborted))
- via_rhine_tx(dev);
- /* Abnormal error summary/uncommon events handlers. */
- if (intr_status & (IntrPCIErr | IntrLinkChange | IntrMIIChange |
- IntrStatsMax | IntrTxAbort | IntrTxUnderrun))
- via_rhine_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;
- }
- }
- if (debug > 3)
- printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.n",
- dev->name, readw(ioaddr + IntrStatus));
- }
- /* This routine is logically part of the interrupt handler, but isolated
- for clarity. */
- static void via_rhine_tx(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- int txstatus = 0, entry = np->dirty_tx % TX_RING_SIZE;
- spin_lock (&np->lock);
- /* find and cleanup dirty tx descriptors */
- while (np->dirty_tx != np->cur_tx) {
- txstatus = le32_to_cpu(np->tx_ring[entry].tx_status);
- if (txstatus & DescOwn)
- break;
- if (debug > 6)
- printk(KERN_DEBUG " Tx scavenge %d status %8.8x.n",
- entry, txstatus);
- if (txstatus & 0x8000) {
- if (debug > 1)
- printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.n",
- dev->name, txstatus);
- np->stats.tx_errors++;
- if (txstatus & 0x0400) np->stats.tx_carrier_errors++;
- if (txstatus & 0x0200) np->stats.tx_window_errors++;
- if (txstatus & 0x0100) np->stats.tx_aborted_errors++;
- if (txstatus & 0x0080) np->stats.tx_heartbeat_errors++;
- if (txstatus & 0x0002) np->stats.tx_fifo_errors++;
- /* Transmitter restarted in 'abnormal' handler. */
- } else {
- np->stats.collisions += (txstatus >> 3) & 15;
- np->stats.tx_bytes += np->tx_skbuff[entry]->len;
- np->stats.tx_packets++;
- }
- /* Free the original skb. */
- if (np->tx_skbuff_dma[entry]) {
- pci_unmap_single(np->pdev,
- np->tx_skbuff_dma[entry],
- np->tx_skbuff[entry]->len, PCI_DMA_TODEVICE);
- }
- dev_kfree_skb_irq(np->tx_skbuff[entry]);
- np->tx_skbuff[entry] = NULL;
- entry = (++np->dirty_tx) % TX_RING_SIZE;
- }
- if ((np->cur_tx - np->dirty_tx) < TX_QUEUE_LEN - 4)
- netif_wake_queue (dev);
- spin_unlock (&np->lock);
- }
- /* This routine is logically part of the interrupt handler, but isolated
- for clarity and better register allocation. */
- static void via_rhine_rx(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- int entry = np->cur_rx % RX_RING_SIZE;
- int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
- if (debug > 4) {
- printk(KERN_DEBUG " In via_rhine_rx(), entry %d status %8.8x.n",
- entry, le32_to_cpu(np->rx_head_desc->rx_status));
- }
- /* If EOP is set on the next entry, it's a new packet. Send it up. */
- while ( ! (np->rx_head_desc->rx_status & cpu_to_le32(DescOwn))) {
- struct rx_desc *desc = np->rx_head_desc;
- u32 desc_status = le32_to_cpu(desc->rx_status);
- int data_size = desc_status >> 16;
- if (debug > 4)
- printk(KERN_DEBUG " via_rhine_rx() status is %8.8x.n",
- desc_status);
- if (--boguscnt < 0)
- break;
- if ( (desc_status & (RxWholePkt | RxErr)) != RxWholePkt) {
- if ((desc_status & RxWholePkt) != RxWholePkt) {
- printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
- "multiple buffers, entry %#x length %d status %8.8x!n",
- dev->name, entry, data_size, desc_status);
- printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.n",
- dev->name, np->rx_head_desc, &np->rx_ring[entry]);
- np->stats.rx_length_errors++;
- } else if (desc_status & RxErr) {
- /* There was a error. */
- if (debug > 2)
- printk(KERN_DEBUG " via_rhine_rx() Rx error was %8.8x.n",
- desc_status);
- np->stats.rx_errors++;
- if (desc_status & 0x0030) np->stats.rx_length_errors++;
- if (desc_status & 0x0048) np->stats.rx_fifo_errors++;
- if (desc_status & 0x0004) np->stats.rx_frame_errors++;
- if (desc_status & 0x0002) {
- /* this can also be updated outside the interrupt handler */
- spin_lock (&np->lock);
- np->stats.rx_crc_errors++;
- spin_unlock (&np->lock);
- }
- }
- } else {
- struct sk_buff *skb;
- /* Length should omit the CRC */
- int pkt_len = data_size - 4;
- /* Check if the packet is long enough to accept without copying
- to a minimally-sized skbuff. */
- if (pkt_len < rx_copybreak &&
- (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
- skb->dev = dev;
- skb_reserve(skb, 2); /* 16 byte align the IP header */
- pci_dma_sync_single(np->pdev, np->rx_skbuff_dma[entry],
- np->rx_buf_sz, PCI_DMA_FROMDEVICE);
- /* *_IP_COPYSUM isn't defined anywhere and eth_copy_and_sum
- is memcpy for all archs so this is kind of pointless right
- now ... or? */
- #if HAS_IP_COPYSUM /* Call copy + cksum if available. */
- eth_copy_and_sum(skb, np->rx_skbuff[entry]->tail, pkt_len, 0);
- skb_put(skb, pkt_len);
- #else
- memcpy(skb_put(skb, pkt_len), np->rx_skbuff[entry]->tail,
- pkt_len);
- #endif
- } else {
- skb = np->rx_skbuff[entry];
- if (skb == NULL) {
- printk(KERN_ERR "%s: Inconsistent Rx descriptor chain.n",
- dev->name);
- break;
- }
- np->rx_skbuff[entry] = NULL;
- skb_put(skb, pkt_len);
- pci_unmap_single(np->pdev, np->rx_skbuff_dma[entry],
- np->rx_buf_sz, PCI_DMA_FROMDEVICE);
- }
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- np->stats.rx_bytes += pkt_len;
- np->stats.rx_packets++;
- }
- entry = (++np->cur_rx) % RX_RING_SIZE;
- np->rx_head_desc = &np->rx_ring[entry];
- }
- /* Refill the Rx ring buffers. */
- for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
- struct sk_buff *skb;
- entry = np->dirty_rx % RX_RING_SIZE;
- if (np->rx_skbuff[entry] == NULL) {
- skb = dev_alloc_skb(np->rx_buf_sz);
- np->rx_skbuff[entry] = skb;
- if (skb == NULL)
- break; /* Better luck next round. */
- skb->dev = dev; /* Mark as being used by this device. */
- np->rx_skbuff_dma[entry] =
- pci_map_single(np->pdev, skb->tail, np->rx_buf_sz,
- PCI_DMA_FROMDEVICE);
- np->rx_ring[entry].addr = cpu_to_le32(np->rx_skbuff_dma[entry]);
- }
- np->rx_ring[entry].rx_status = cpu_to_le32(DescOwn);
- }
- /* Pre-emptively restart Rx engine. */
- writew(CmdRxDemand | np->chip_cmd, dev->base_addr + ChipCmd);
- }
- static void via_rhine_error(struct net_device *dev, int intr_status)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- spin_lock (&np->lock);
- if (intr_status & (IntrMIIChange | IntrLinkChange)) {
- if (readb(ioaddr + MIIStatus) & 0x02) {
- /* Link failed, restart autonegotiation. */
- if (np->drv_flags & HasDavicomPhy)
- mdio_write(dev, np->phys[0], MII_BMCR, 0x3300);
- } else
- via_rhine_check_duplex(dev);
- if (debug)
- printk(KERN_ERR "%s: MII status changed: Autonegotiation "
- "advertising %4.4x partner %4.4x.n", dev->name,
- mdio_read(dev, np->phys[0], MII_ADVERTISE),
- mdio_read(dev, np->phys[0], MII_LPA));
- }
- if (intr_status & IntrStatsMax) {
- np->stats.rx_crc_errors += readw(ioaddr + RxCRCErrs);
- np->stats.rx_missed_errors += readw(ioaddr + RxMissed);
- clear_tally_counters(ioaddr);
- }
- if (intr_status & IntrTxAbort) {
- /* Stats counted in Tx-done handler, just restart Tx. */
- writew(CmdTxDemand | np->chip_cmd, dev->base_addr + ChipCmd);
- }
- if (intr_status & IntrTxUnderrun) {
- if (np->tx_thresh < 0xE0)
- writeb(np->tx_thresh += 0x20, ioaddr + TxConfig);
- if (debug > 1)
- printk(KERN_INFO "%s: Transmitter underrun, increasing Tx "
- "threshold setting to %2.2x.n", dev->name, np->tx_thresh);
- }
- if ((intr_status & ~( IntrLinkChange | IntrStatsMax |
- IntrTxAbort | IntrTxAborted))) {
- if (debug > 1)
- printk(KERN_ERR "%s: Something Wicked happened! %4.4x.n",
- dev->name, intr_status);
- /* Recovery for other fault sources not known. */
- writew(CmdTxDemand | np->chip_cmd, dev->base_addr + ChipCmd);
- }
- spin_unlock (&np->lock);
- }
- static struct net_device_stats *via_rhine_get_stats(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- unsigned long flags;
- spin_lock_irqsave(&np->lock, flags);
- np->stats.rx_crc_errors += readw(ioaddr + RxCRCErrs);
- np->stats.rx_missed_errors += readw(ioaddr + RxMissed);
- clear_tally_counters(ioaddr);
- spin_unlock_irqrestore(&np->lock, flags);
- return &np->stats;
- }
- /* Clears the "tally counters" for CRC errors and missed frames(?).
- It has been reported that some chips need a write of 0 to clear
- these, for others the counters are set to 1 when written to and
- instead cleared when read. So we clear them both ways ... */
- static inline void clear_tally_counters(const long ioaddr)
- {
- writel(0, ioaddr + RxMissed);
- readw(ioaddr + RxCRCErrs);
- readw(ioaddr + RxMissed);
- }
- /* The big-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 = 0x04c11db7U;
- static inline u32 ether_crc(int length, unsigned char *data)
- {
- int crc = -1;
- 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);
- }
- }
- return crc;
- }
- static void via_rhine_set_rx_mode(struct net_device *dev)
- {
- struct netdev_private *np = dev->priv;
- long ioaddr = dev->base_addr;
- u32 mc_filter[2]; /* Multicast hash filter */
- u8 rx_mode; /* Note: 0x02=accept runt, 0x01=accept errs */
- if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
- /* Unconditionally log net taps. */
- printk(KERN_NOTICE "%s: Promiscuous mode enabled.n", dev->name);
- rx_mode = 0x1C;
- } else if ((dev->mc_count > multicast_filter_limit)
- || (dev->flags & IFF_ALLMULTI)) {
- /* Too many to match, or accept all multicasts. */
- writel(0xffffffff, ioaddr + MulticastFilter0);
- writel(0xffffffff, ioaddr + MulticastFilter1);
- rx_mode = 0x0C;
- } else {
- struct dev_mc_list *mclist;
- int i;
- memset(mc_filter, 0, sizeof(mc_filter));
- for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
- i++, mclist = mclist->next) {
- int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26;
- mc_filter[bit_nr >> 5] |= cpu_to_le32(1 << (bit_nr & 31));
- }
- writel(mc_filter[0], ioaddr + MulticastFilter0);
- writel(mc_filter[1], ioaddr + MulticastFilter1);
- rx_mode = 0x0C;
- }
- writeb(np->rx_thresh | rx_mode, ioaddr + RxConfig);
- }
- static int via_rhine_ethtool_ioctl (struct net_device *dev, void *useraddr)
- {
- struct netdev_private *np = dev->priv;
- u32 ethcmd;
- if (get_user(ethcmd, (u32 *)useraddr))
- return -EFAULT;
- switch (ethcmd) {
- case ETHTOOL_GDRVINFO: {
- struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
- strcpy (info.driver, DRV_NAME);
- strcpy (info.version, DRV_VERSION);
- strcpy (info.bus_info, np->pdev->slot_name);
- if (copy_to_user (useraddr, &info, sizeof (info)))
- return -EFAULT;
- return 0;
- }
- /* get settings */
- case ETHTOOL_GSET: {
- struct ethtool_cmd ecmd = { ETHTOOL_GSET };
- if (!(np->drv_flags & CanHaveMII))
- break;
- spin_lock_irq(&np->lock);
- mii_ethtool_gset(&np->mii_if, &ecmd);
- spin_unlock_irq(&np->lock);
- if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
- return -EFAULT;
- return 0;
- }
- /* set settings */
- case ETHTOOL_SSET: {
- int r;
- struct ethtool_cmd ecmd;
- if (!(np->drv_flags & CanHaveMII))
- break;
- if (copy_from_user(&ecmd, useraddr, sizeof(ecmd)))
- return -EFAULT;
- spin_lock_irq(&np->lock);
- r = mii_ethtool_sset(&np->mii_if, &ecmd);
- spin_unlock_irq(&np->lock);
- return r;
- }
- /* restart autonegotiation */
- case ETHTOOL_NWAY_RST: {
- if (!(np->drv_flags & CanHaveMII))
- break;
- return mii_nway_restart(&np->mii_if);
- }
- /* get link status */
- case ETHTOOL_GLINK: {
- struct ethtool_value edata = {ETHTOOL_GLINK};
- if (!(np->drv_flags & CanHaveMII))
- break;
- edata.data = mii_link_ok(&np->mii_if);
- if (copy_to_user(useraddr, &edata, sizeof(edata)))
- return -EFAULT;
- return 0;
- }
- /* get message-level */
- case ETHTOOL_GMSGLVL: {
- struct ethtool_value edata = {ETHTOOL_GMSGLVL};
- edata.data = debug;
- if (copy_to_user(useraddr, &edata, sizeof(edata)))
- return -EFAULT;
- return 0;
- }
- /* set message-level */
- case ETHTOOL_SMSGLVL: {
- struct ethtool_value edata;
- if (copy_from_user(&edata, useraddr, sizeof(edata)))
- return -EFAULT;
- debug = edata.data;
- return 0;
- }
- default:
- break;
- }
- return -EOPNOTSUPP;
- }
- static int via_rhine_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
- {
- struct netdev_private *np = dev->priv;
- struct mii_ioctl_data *data = (struct mii_ioctl_data *)&rq->ifr_data;
- unsigned long flags;
- int retval;
- if (cmd == SIOCETHTOOL)
- return via_rhine_ethtool_ioctl(dev, (void *) rq->ifr_data);
- spin_lock_irqsave(&np->lock, flags);
- retval = 0;
- switch(cmd) {
- case SIOCGMIIPHY: /* Get address of MII PHY in use. */
- case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
- data->phy_id = np->phys[0] & 0x1f;
- /* Fall Through */
- case SIOCGMIIREG: /* Read MII PHY register. */
- case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
- data->val_out = mdio_read(dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
- break;
- case SIOCSMIIREG: /* Write MII PHY register. */
- case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */
- if (!capable(CAP_NET_ADMIN)) {
- retval = -EPERM;
- break;
- }
- mdio_write(dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
- break;
- default:
- retval = -EOPNOTSUPP;
- }
- spin_unlock_irqrestore(&np->lock, flags);
- return retval;
- }
- static int via_rhine_close(struct net_device *dev)
- {
- long ioaddr = dev->base_addr;
- struct netdev_private *np = dev->priv;
- del_timer_sync(&np->timer);
- spin_lock_irq(&np->lock);
- netif_stop_queue(dev);
- if (debug > 1)
- printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.n",
- dev->name, readw(ioaddr + ChipCmd));
- /* Switch to loopback mode to avoid hardware races. */
- writeb(np->tx_thresh | 0x02, ioaddr + TxConfig);
- /* Disable interrupts by clearing the interrupt mask. */
- writew(0x0000, ioaddr + IntrEnable);
- /* Stop the chip's Tx and Rx processes. */
- writew(CmdStop, ioaddr + ChipCmd);
- spin_unlock_irq(&np->lock);
- free_irq(np->pdev->irq, dev);
- free_rbufs(dev);
- free_tbufs(dev);
- free_ring(dev);
- return 0;
- }
- static void __devexit via_rhine_remove_one (struct pci_dev *pdev)
- {
- struct net_device *dev = pci_get_drvdata(pdev);
-
- unregister_netdev(dev);
- pci_release_regions(pdev);
- #ifdef USE_MEM
- iounmap((char *)(dev->base_addr));
- #endif
- kfree(dev);
- pci_disable_device(pdev);
- pci_set_drvdata(pdev, NULL);
- }
- static struct pci_driver via_rhine_driver = {
- name: "via-rhine",
- id_table: via_rhine_pci_tbl,
- probe: via_rhine_init_one,
- remove: __devexit_p(via_rhine_remove_one),
- };
- static int __init via_rhine_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 (&via_rhine_driver);
- }
- static void __exit via_rhine_cleanup (void)
- {
- pci_unregister_driver (&via_rhine_driver);
- }
- module_init(via_rhine_init);
- module_exit(via_rhine_cleanup);
- /*
- * Local variables:
- * compile-command: "gcc -DMODULE -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -c via-rhine.c `[ -f /usr/include/linux/modversions.h ] && echo -DMODVERSIONS`"
- * c-indent-level: 4
- * c-basic-offset: 4
- * tab-width: 4
- * End:
- */