/* 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-I. It also works with the 6102 Rhine-II, and 6105/6105M Rhine-III. 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 LK1.1.14 (Ivan G.): - fixes comments for Rhine-III - removes W_MAX_TIMEOUT (unused) - adds HasDavicomPhy for Rhine-I (basis: linuxfet driver; my card is R-I and has Davicom chip, flag is referenced in kernel driver) - sends chip_id as a parameter to wait_for_reset since np is not initialized on first call - changes mmio "else if (chip_id==VT6102)" to "else" so it will work for Rhine-III's (documentation says same bit is correct) - transmit frame queue message is off by one - fixed - adds IntrNormalSummary to "Something Wicked" exclusion list so normal interrupts will not trigger the message (src: Donald Becker) (Roger Luethi) - show confused chip where to continue after Tx error - location of collision counter is chip specific - allow selecting backoff algorithm (module parameter) LK1.1.15 (jgarzik): - Use new MII lib helper generic_mii_ioctl LK1.1.16 (Roger Luethi) - Etherleak fix - Handle Tx buffer underrun - Fix bugs in full duplex handling - New reset code uses "force reset" cmd on Rhine-II - Various clean ups LK1.1.17 (Roger Luethi) - Fix race in via_rhine_start_tx() - On errors, wait for Tx engine to turn off before scavenging - Handle Tx descriptor write-back race on Rhine-II - Force flushing for PCI posted writes - More reset code changes Ported to RTnet: October 2003, Jan Kiszka */ #define DRV_NAME "via-rhine-rt" #define DRV_VERSION "1.1.17-RTnet-0.1" #define DRV_RELDATE "2003-10-05" /* A few user-configurable values. These may be modified when a driver module is loaded. */ static int local_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. */ /*** RTnet *** static int rx_copybreak; *** RTnet ***/ /* Select a backoff algorithm (Ethernet capture effect) */ static int backoff; /* 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 '%'<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 8 /*** RTnet ***/ /* 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.*/ #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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Processor type for cache alignment. */ #include #include #include /*** RTnet ***/ #include #define DEFAULT_RX_POOL_SIZE 16 static int cards[MAX_UNITS] = { [0 ... (MAX_UNITS-1)] = 1 }; module_param_array(cards, int, NULL, 0444); MODULE_PARM_DESC(cards, "array of cards to be supported (e.g. 1,0,1)"); /*** RTnet ***/ /* These identify the driver base version and may not be removed. */ static char version[] = KERN_INFO DRV_NAME ".c:" DRV_VERSION " " DRV_RELDATE " Jan.Kiszka@web.de\n"; 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(addr) inb((unsigned long)(addr)) #define readw(addr) inw((unsigned long)(addr)) #define readl(addr) inl((unsigned long)(addr)) #define writeb(val,addr) outb((val),(unsigned long)(addr)) #define writew(val,addr) outw((val),(unsigned long)(addr)) #define writel(val,addr) outl((val),(unsigned long)(addr)) /*#endif*/ MODULE_AUTHOR("Jan Kiszka"); MODULE_DESCRIPTION("RTnet VIA Rhine PCI Fast Ethernet driver"); MODULE_LICENSE("GPL"); module_param(max_interrupt_work, int, 0444); module_param_named(debug, local_debug, int, 0444); /*** RTnet *** MODULE_PARM(rx_copybreak, "i"); *** RTnet ***/ module_param(backoff, int, 0444); module_param_array(options, int, NULL, 0444); module_param_array(full_duplex, int, NULL, 0444); MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt"); MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)"); /*** RTnet *** MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames"); *** RTnet ***/ MODULE_PARM_DESC(backoff, "VIA Rhine: Bits 0-3: backoff algorithm"); 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. For most of these settings, 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, VT6105, VT6105M }; 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 /* Beware of PCI posted writes */ #define IOSYNC do { readb((void *)dev->base_addr + StationAddr); } while (0) /* directly indexed by enum via_rhine_chips, above */ static struct via_rhine_chip_info via_rhine_chip_info[] = { { "VIA VT86C100A Rhine", RHINE_IOTYPE, 128, CanHaveMII | ReqTxAlign | HasDavicomPhy }, { "VIA VT6102 Rhine-II", RHINE_IOTYPE, 256, CanHaveMII | HasWOL }, { "VIA VT6105 Rhine-III", RHINE_IOTYPE, 256, CanHaveMII | HasWOL }, { "VIA VT6105M Rhine-III", RHINE_IOTYPE, 256, CanHaveMII | HasWOL }, }; static struct pci_device_id via_rhine_pci_tbl[] = { {0x1106, 0x3043, PCI_ANY_ID, PCI_ANY_ID, 0, 0, VT86C100A}, {0x1106, 0x3065, PCI_ANY_ID, PCI_ANY_ID, 0, 0, VT6102}, {0x1106, 0x3106, PCI_ANY_ID, PCI_ANY_ID, 0, 0, VT6105}, {0x1106, 0x3053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, VT6105M}, {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, MiscCmd=0x81, StickyHW=0x83, IntrStatus2=0x84, WOLcrClr=0xA4, WOLcgClr=0xA7, PwrcsrClr=0xAC, }; /* Bits in ConfigD */ enum backoff_bits { BackOptional=0x01, BackModify=0x02, BackCaptureEffect=0x04, BackRandom=0x08 }; #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, IntrTxError=0x0008, IntrTxUnderrun=0x0210, IntrPCIErr=0x0040, IntrStatsMax=0x0080, IntrRxEarly=0x0100, IntrRxOverflow=0x0400, IntrRxDropped=0x0800, IntrRxNoBuf=0x1000, IntrTxAborted=0x2000, IntrLinkChange=0x4000, IntrRxWakeUp=0x8000, IntrNormalSummary=0x0003, IntrAbnormalSummary=0xC260, IntrTxDescRace=0x080000, /* mapped from IntrStatus2 */ IntrTxErrSummary=0x082218, }; /* The Rx and Tx buffer descriptors. */ struct rx_desc { s32 rx_status; u32 desc_length; /* Chain flag, Buffer/frame length */ u32 addr; u32 next_desc; }; struct tx_desc { s32 tx_status; u32 desc_length; /* Chain flag, Tx Config, Frame length */ u32 addr; u32 next_desc; }; /* Initial value for tx_desc.desc_length, Buffer size goes to bits 0-10 */ #define TXDESC 0x00e08000 enum rx_status_bits { RxOK=0x8000, RxWholePkt=0x0300, RxErr=0x008F }; /* Bits in *_desc.*_status */ enum desc_status_bits { DescOwn=0x80000000 }; /* 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 rtskb *rx_skbuff[RX_RING_SIZE]; /*** RTnet ***/ dma_addr_t rx_skbuff_dma[RX_RING_SIZE]; /* The saved address of a sent-in-place packet/buffer, for later free(). */ struct rtskb *tx_skbuff[TX_RING_SIZE]; /*** RTnet ***/ 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. */ rtdm_lock_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 default_port:4; /* Last dev->if_port value. */ u8 tx_thresh, rx_thresh; /* MII transceiver section. */ 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; unsigned int mii_if_force_media; /*** RTnet, support for older kernels (e.g. 2.4.19) ***/ rtdm_irq_t irq_handle; }; /*** RTnet ***/ static int mdio_read(struct rtnet_device *dev, int phy_id, int location); static void mdio_write(struct rtnet_device *dev, int phy_id, int location, int value); static int via_rhine_open(struct rtnet_device *dev); static void via_rhine_check_duplex(struct rtnet_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 rtskb *skb, struct rtnet_device *dev); static int via_rhine_interrupt(rtdm_irq_t *irq_handle); static void via_rhine_tx(struct rtnet_device *dev); static void via_rhine_rx(struct rtnet_device *dev, nanosecs_abs_t *time_stamp); static void via_rhine_error(struct rtnet_device *dev, int intr_status); static void via_rhine_set_rx_mode(struct rtnet_device *dev); static struct net_device_stats *via_rhine_get_stats(struct rtnet_device *rtdev); /*static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);*/ static int via_rhine_close(struct rtnet_device *dev); /*** RTnet ***/ static inline u32 get_intr_status(struct rtnet_device *dev) /*** RTnet ***/ { void *ioaddr = (void *)dev->base_addr; struct netdev_private *np = dev->priv; u32 intr_status; intr_status = readw(ioaddr + IntrStatus); /* On Rhine-II, Bit 3 indicates Tx descriptor write-back race. */ if (np->chip_id == VT6102) intr_status |= readb(ioaddr + IntrStatus2) << 16; return intr_status; } static void wait_for_reset(struct rtnet_device *dev, int chip_id, char *name) /*** RTnet ***/ { void *ioaddr = (void *)dev->base_addr; int boguscnt = 20; IOSYNC; if (readw(ioaddr + ChipCmd) & CmdReset) { printk(KERN_INFO "%s: Reset not complete yet. " "Trying harder.\n", name); /* Rhine-II needs to be forced sometimes */ if (chip_id == VT6102) writeb(0x40, ioaddr + MiscCmd); /* VT86C100A may need long delay after reset (dlink) */ /* Seen on Rhine-II as well (rl) */ while ((readw(ioaddr + ChipCmd) & CmdReset) && --boguscnt) udelay(5); } if (local_debug > 1) printk(KERN_INFO "%s: Reset %s.\n", name, boguscnt ? "succeeded" : "failed"); } #ifdef USE_MEM static void enable_mmio(long ioaddr, int chip_id) { int n; if (chip_id == VT86C100A) { /* More recent docs say that this bit is reserved ... */ n = inb(ioaddr + ConfigA) | 0x20; outb(n, ioaddr + ConfigA); } else { n = inb(ioaddr + ConfigD) | 0x80; outb(n, ioaddr + ConfigD); } } #endif static void 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 via_rhine_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) { struct rtnet_device *dev; /*** RTnet ***/ struct netdev_private *np; int i, option; int chip_id = (int) ent->driver_data; static int card_idx = -1; void *ioaddr; long memaddr; unsigned 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; /*** RTnet ***/ if (cards[card_idx] == 0) goto err_out; /*** RTnet ***/ if (pci_enable_device (pdev)) goto err_out; /* this should always be supported */ if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) { 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, aborting\n"); goto err_out; } ioaddr = (void *)pci_resource_start (pdev, 0); memaddr = pci_resource_start (pdev, 1); if (pci_flags & PCI_USES_MASTER) pci_set_master (pdev); /*** RTnet ***/ dev = rt_alloc_etherdev(sizeof(struct netdev_private), RX_RING_SIZE * 2 + TX_RING_SIZE); if (dev == NULL) { printk (KERN_ERR "init_ethernet failed for card #%d\n", card_idx); goto err_out; } rtdev_alloc_name(dev, "rteth%d"); rt_rtdev_connect(dev, &RTDEV_manager); dev->vers = RTDEV_VERS_2_0; dev->sysbind = &pdev->dev; /*** RTnet ***/ if (pci_request_regions(pdev, shortname)) goto err_out_free_netdev; #ifdef USE_MEM ioaddr0 = (long)ioaddr; enable_mmio(ioaddr0, chip_id); ioaddr = ioremap (memaddr, io_size); if (!ioaddr) { printk (KERN_ERR "ioremap failed for device %s, region 0x%X @ 0x%lX\n", pci_name(pdev), 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 = (long)ioaddr; wait_for_reset(dev, chip_id, shortname); /* Reload the station address from the EEPROM. */ #ifdef USE_IO reload_eeprom((long)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 #%d\n", 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); } /* Select backoff algorithm */ if (backoff) writeb(readb(ioaddr + ConfigD) & (0xF0 | backoff), ioaddr + ConfigD); dev->irq = pdev->irq; np = dev->priv; rtdm_lock_init (&np->lock); np->chip_id = chip_id; np->drv_flags = via_rhine_chip_info[chip_id].drv_flags; np->pdev = pdev; /*** RTnet *** np->mii_if.dev = dev; np->mii_if.mdio_read = mdio_read; np->mii_if.mdio_write = mdio_write; np->mii_if.phy_id_mask = 0x1f; np->mii_if.reg_num_mask = 0x1f; *** RTnet ***/ if (dev->mem_start) option = dev->mem_start; /* 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; /*** RTnet *** dev->set_multicast_list = via_rhine_set_rx_mode; dev->do_ioctl = netdev_ioctl; dev->tx_timeout = via_rhine_tx_timeout; dev->watchdog_timeo = TX_TIMEOUT; *** RTnet ***/ if (np->drv_flags & ReqTxAlign) dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM; /* dev->name not defined before register_netdev()! */ /*** RTnet ***/ i = rt_register_rtnetdev(dev); if (i) { goto err_out_unmap; } /*** RTnet ***/ /* The lower four bits are the media type. */ if (option > 0) { if (option & 0x220) 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_force_media = 1; /*** RTnet ***/ } printk(KERN_INFO "%s: %s at 0x%lx, ", dev->name, via_rhine_chip_info[chip_id].name, (pci_flags & PCI_USES_IO) ? (long)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 & BMSR_LSTATUS) rtnetif_carrier_on(dev); /*** RTnet ***/ else rtnetif_carrier_off(dev); /*** RTnet ***/ } } 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], MII_BMCR, ((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: /*** RTnet ***/ rt_rtdev_disconnect(dev); rtdev_free(dev); /*** RTnet ***/ err_out: return -ENODEV; } static int alloc_ring(struct rtnet_device* dev) /*** RTnet ***/ { struct netdev_private *np = dev->priv; void *ring; dma_addr_t ring_dma; ring = dma_alloc_coherent(&np->pdev->dev, RX_RING_SIZE * sizeof(struct rx_desc) + TX_RING_SIZE * sizeof(struct tx_desc), &ring_dma, GFP_ATOMIC); if (!ring) { printk(KERN_ERR "Could not allocate DMA memory.\n"); return -ENOMEM; } if (np->drv_flags & ReqTxAlign) { np->tx_bufs = dma_alloc_coherent(&np->pdev->dev, PKT_BUF_SZ * TX_RING_SIZE, &np->tx_bufs_dma, GFP_ATOMIC); if (np->tx_bufs == NULL) { dma_free_coherent(&np->pdev->dev, 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 rtnet_device* dev) /*** RTnet ***/ { struct netdev_private *np = dev->priv; dma_free_coherent(&np->pdev->dev, 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) dma_free_coherent(&np->pdev->dev, PKT_BUF_SZ * TX_RING_SIZE, np->tx_bufs, np->tx_bufs_dma); np->tx_bufs = NULL; } static void alloc_rbufs(struct rtnet_device *dev) /*** RTnet ***/ { 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 rtskb *skb = rtnetdev_alloc_rtskb(dev, np->rx_buf_sz); /*** RTnet ***/ np->rx_skbuff[i] = skb; if (skb == NULL) break; np->rx_skbuff_dma[i] = dma_map_single(&np->pdev->dev, skb->tail, np->rx_buf_sz, DMA_FROM_DEVICE); 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 rtnet_device* dev) /*** RTnet ***/ { 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]) { dma_unmap_single(&np->pdev->dev, np->rx_skbuff_dma[i], np->rx_buf_sz, DMA_FROM_DEVICE); dev_kfree_rtskb(np->rx_skbuff[i]); /*** RTnet ***/ } np->rx_skbuff[i] = 0; } } static void alloc_tbufs(struct rtnet_device* dev) /*** RTnet ***/ { 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(TXDESC); 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 rtnet_device* dev) /*** RTnet ***/ { 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(TXDESC); np->tx_ring[i].addr = cpu_to_le32(0xBADF00D0); /* An invalid address. */ if (np->tx_skbuff[i]) { if (np->tx_skbuff_dma[i]) { dma_unmap_single(&np->pdev->dev, np->tx_skbuff_dma[i], np->tx_skbuff[i]->len, DMA_TO_DEVICE); } dev_kfree_rtskb(np->tx_skbuff[i]); /*** RTnet ***/ } np->tx_skbuff[i] = 0; np->tx_buf[i] = 0; } } static void init_registers(struct rtnet_device *dev) /*** RTnet ***/ { struct netdev_private *np = dev->priv; void *ioaddr = (void *)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 initial FIFO thresholds. */ writeb(0x20, ioaddr + TxConfig); np->tx_thresh = 0x20; np->rx_thresh = 0x60; /* Written in via_rhine_set_rx_mode(). */ np->mii_if.full_duplex = 0; 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 | IntrRxNoBuf | IntrTxAborted | IntrTxDone | IntrTxError | IntrTxUnderrun | IntrPCIErr | IntrStatsMax | IntrLinkChange, ioaddr + IntrEnable); np->chip_cmd = CmdStart|CmdTxOn|CmdRxOn|CmdNoTxPoll; if (np->mii_if_force_media) /*** RTnet ***/ 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 rtnet_device *dev, int phy_id, int regnum) /*** RTnet ***/ { void *ioaddr = (void *)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 rtnet_device *dev, int phy_id, int regnum, int value) /*** RTnet ***/ { struct netdev_private *np = dev->priv; void *ioaddr = (void *)dev->base_addr; int boguscnt = 1024; if (phy_id == np->phys[0]) { switch (regnum) { case MII_BMCR: /* Is user forcing speed/duplex? */ if (value & 0x9000) /* Autonegotiation. */ np->mii_if_force_media = 0; /*** RTnet ***/ else np->mii_if.full_duplex = (value & 0x0100) ? 1 : 0; break; case MII_ADVERTISE: 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 rtnet_device *dev) /*** RTnet ***/ { struct netdev_private *np = dev->priv; void *ioaddr = (void *)dev->base_addr; int i; /* Reset the chip. */ writew(CmdReset, ioaddr + ChipCmd); /*** RTnet ***/ rt_stack_connect(dev, &STACK_manager); i = rtdm_irq_request(&np->irq_handle, dev->irq, via_rhine_interrupt, RTDM_IRQTYPE_SHARED, "rt_via-rhine", dev); /*** RTnet ***/ if (i) { return i; } if (local_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, np->chip_id, dev->name); init_registers(dev); if (local_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)); rtnetif_start_queue(dev); /*** RTnet ***/ /*** RTnet ***/ /* Set the timer to check for link beat. */ /*** RTnet ***/ return 0; } static void via_rhine_check_duplex(struct rtnet_device *dev) /*** RTnet ***/ { struct netdev_private *np = dev->priv; void *ioaddr = (void *)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_force_media || mii_lpa == 0xffff) /*** RTnet ***/ return; duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040; if (np->mii_if.full_duplex != duplex) { np->mii_if.full_duplex = duplex; if (local_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); } } /*** RTnet ***/ /*** RTnet ***/ static int via_rhine_start_tx(struct rtskb *skb, struct rtnet_device *dev) /*** RTnet ***/ { struct netdev_private *np = dev->priv; unsigned entry; u32 intr_status; /*** RTnet ***/ rtdm_lockctx_t context; /*** RTnet ***/ /* 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; if (skb->len < ETH_ZLEN) { skb = rtskb_padto(skb, ETH_ZLEN); if(skb == NULL) return 0; } np->tx_skbuff[entry] = skb; if ((np->drv_flags & ReqTxAlign) && (((long)skb->data & 3) || /*** RTnet skb_shinfo(skb)->nr_frags != 0 || RTnet ***/ skb->ip_summed == CHECKSUM_PARTIAL) ) { /* Must use alignment buffer. */ if (skb->len > PKT_BUF_SZ) { /* packet too long, drop it */ dev_kfree_rtskb(skb); /*** RTnet ***/ np->tx_skbuff[entry] = NULL; np->stats.tx_dropped++; return 0; } /*** RTnet ***/ /* get and patch time stamp just before the transmission */ if (skb->xmit_stamp) { rtdm_lock_get_irqsave(&np->lock, context); *skb->xmit_stamp = cpu_to_be64(rtdm_clock_read() + *skb->xmit_stamp); rtskb_copy_and_csum_dev(skb, np->tx_buf[entry]); } else { /* no need to block the interrupts during copy */ rtskb_copy_and_csum_dev(skb, np->tx_buf[entry]); rtdm_lock_get_irqsave(&np->lock, context); } /*** RTnet ***/ 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] = dma_map_single(&np->pdev->dev, skb->data, skb->len, DMA_TO_DEVICE); np->tx_ring[entry].addr = cpu_to_le32(np->tx_skbuff_dma[entry]); /*** RTnet ***/ rtdm_lock_get_irqsave(&np->lock, context); /* get and patch time stamp just before the transmission */ if (skb->xmit_stamp) *skb->xmit_stamp = cpu_to_be64(rtdm_clock_read() + *skb->xmit_stamp); /*** RTnet ***/ } np->tx_ring[entry].desc_length = cpu_to_le32(TXDESC | (skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN)); 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 unless errors are * pending (the ISR must sort them out first). */ intr_status = get_intr_status(dev); if ((intr_status & IntrTxErrSummary) == 0) { writew(CmdTxDemand | np->chip_cmd, (void *)dev->base_addr + ChipCmd); } IOSYNC; if (np->cur_tx == np->dirty_tx + TX_QUEUE_LEN) rtnetif_stop_queue(dev); /*** RTnet ***/ /*dev->trans_start = jiffies; *** RTnet ***/ /*** RTnet ***/ rtdm_lock_put_irqrestore(&np->lock, context); /*** RTnet ***/ if (local_debug > 4) { rtdm_printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n", /*** RTnet ***/ dev->name, np->cur_tx-1, entry); } return 0; } /* The interrupt handler does all of the Rx thread work and cleans up after the Tx thread. */ static int via_rhine_interrupt(rtdm_irq_t *irq_handle) /*** RTnet ***/ { nanosecs_abs_t time_stamp = rtdm_clock_read(); /*** RTnet ***/ struct rtnet_device *dev = rtdm_irq_get_arg(irq_handle, struct rtnet_device); /*** RTnet ***/ long ioaddr; u32 intr_status; int boguscnt = max_interrupt_work; struct netdev_private *np = dev->priv; /*** RTnet ***/ unsigned int old_packet_cnt = np->stats.rx_packets; /*** RTnet ***/ int ret = RTDM_IRQ_NONE; ioaddr = dev->base_addr; while ((intr_status = get_intr_status(dev))) { /* Acknowledge all of the current interrupt sources ASAP. */ if (intr_status & IntrTxDescRace) writeb(0x08, (void *)ioaddr + IntrStatus2); writew(intr_status & 0xffff, (void *)ioaddr + IntrStatus); IOSYNC; ret = RTDM_IRQ_HANDLED; if (local_debug > 4) rtdm_printk(KERN_DEBUG "%s: Interrupt, status %8.8x.\n", /*** RTnet ***/ dev->name, intr_status); if (intr_status & (IntrRxDone | IntrRxErr | IntrRxDropped | IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf)) via_rhine_rx(dev, &time_stamp); if (intr_status & (IntrTxErrSummary | IntrTxDone)) { if (intr_status & IntrTxErrSummary) { /*** RTnet ***/ rtdm_printk(KERN_ERR "%s: via_rhine_interrupt(), Transmissions error\n", dev->name); /*** RTnet ***/ } via_rhine_tx(dev); } /* Abnormal error summary/uncommon events handlers. */ if (intr_status & (IntrPCIErr | IntrLinkChange | IntrStatsMax | IntrTxError | IntrTxAborted | IntrTxUnderrun | IntrTxDescRace)) via_rhine_error(dev, intr_status); if (--boguscnt < 0) { rtdm_printk(KERN_WARNING "%s: Too much work at interrupt, " /*** RTnet ***/ "status=%#8.8x.\n", dev->name, intr_status); break; } } if (local_debug > 3) rtdm_printk(KERN_DEBUG "%s: exiting interrupt, status=%8.8x.\n", /*** RTnet ***/ dev->name, readw((void *)ioaddr + IntrStatus)); /*** RTnet ***/ if (old_packet_cnt != np->stats.rx_packets) rt_mark_stack_mgr(dev); return ret; } /* This routine is logically part of the interrupt handler, but isolated for clarity. */ static void via_rhine_tx(struct rtnet_device *dev) /*** RTnet ***/ { struct netdev_private *np = dev->priv; int txstatus = 0, entry = np->dirty_tx % TX_RING_SIZE; rtdm_lock_get(&np->lock); /*** RTnet ***/ /* find and cleanup dirty tx descriptors */ while (np->dirty_tx != np->cur_tx) { txstatus = le32_to_cpu(np->tx_ring[entry].tx_status); if (local_debug > 6) rtdm_printk(KERN_DEBUG " Tx scavenge %d status %8.8x.\n", /*** RTnet ***/ entry, txstatus); if (txstatus & DescOwn) break; if (txstatus & 0x8000) { if (local_debug > 1) rtdm_printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n", /*** RTnet ***/ 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 (((np->chip_id == VT86C100A) && txstatus & 0x0002) || (txstatus & 0x0800) || (txstatus & 0x1000)) { np->stats.tx_fifo_errors++; np->tx_ring[entry].tx_status = cpu_to_le32(DescOwn); break; /* Keep the skb - we try again */ } /* Transmitter restarted in 'abnormal' handler. */ } else { if (np->chip_id == VT86C100A) np->stats.collisions += (txstatus >> 3) & 0x0F; else np->stats.collisions += txstatus & 0x0F; if (local_debug > 6) rtdm_printk(KERN_DEBUG "collisions: %1.1x:%1.1x\n", /*** RTnet ***/ (txstatus >> 3) & 0xF, txstatus & 0xF); np->stats.tx_bytes += np->tx_skbuff[entry]->len; np->stats.tx_packets++; } /* Free the original skb. */ if (np->tx_skbuff_dma[entry]) { dma_unmap_single(&np->pdev->dev, np->tx_skbuff_dma[entry], np->tx_skbuff[entry]->len, DMA_TO_DEVICE); } dev_kfree_rtskb(np->tx_skbuff[entry]); /*** RTnet ***/ np->tx_skbuff[entry] = NULL; entry = (++np->dirty_tx) % TX_RING_SIZE; } if ((np->cur_tx - np->dirty_tx) < TX_QUEUE_LEN - 4) rtnetif_wake_queue (dev); /*** RTnet ***/ rtdm_lock_put(&np->lock); /*** RTnet ***/ } /* This routine is logically part of the interrupt handler, but isolated for clarity and better register allocation. */ static void via_rhine_rx(struct rtnet_device *dev, nanosecs_abs_t *time_stamp) /*** RTnet ***/ { 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 (local_debug > 4) { rtdm_printk(KERN_DEBUG "%s: via_rhine_rx(), entry %d status %8.8x.\n", /*** RTnet ***/ dev->name, 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 (local_debug > 4) rtdm_printk(KERN_DEBUG " via_rhine_rx() status is %8.8x.\n", /*** RTnet ***/ desc_status); if (--boguscnt < 0) break; if ( (desc_status & (RxWholePkt | RxErr)) != RxWholePkt) { if ((desc_status & RxWholePkt) != RxWholePkt) { rtdm_printk(KERN_WARNING "%s: Oversized Ethernet frame spanned " /*** RTnet ***/ "multiple buffers, entry %#x length %d status %8.8x!\n", dev->name, entry, data_size, desc_status); rtdm_printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n", /*** RTnet ***/ 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 (local_debug > 2) rtdm_printk(KERN_DEBUG " via_rhine_rx() Rx error was %8.8x.\n", /*** RTnet ***/ 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) /* RTnet: this is only updated in the interrupt handler */ np->stats.rx_crc_errors++; } } else { struct rtskb *skb; /*** RTnet ***/ /* 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. */ /*** RTnet ***/ { /*** RTnet ***/ skb = np->rx_skbuff[entry]; if (skb == NULL) { rtdm_printk(KERN_ERR "%s: Inconsistent Rx descriptor chain.\n", /*** RTnet ***/ dev->name); break; } np->rx_skbuff[entry] = NULL; rtskb_put(skb, pkt_len); /*** RTnet ***/ dma_unmap_single(&np->pdev->dev, np->rx_skbuff_dma[entry], np->rx_buf_sz, DMA_FROM_DEVICE); } /*** RTnet ***/ skb->protocol = rt_eth_type_trans(skb, dev); skb->time_stamp = *time_stamp; rtnetif_rx(skb); /*dev->last_rx = jiffies;*/ /*** RTnet ***/ 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 rtskb *skb; /*** RTnet ***/ entry = np->dirty_rx % RX_RING_SIZE; if (np->rx_skbuff[entry] == NULL) { skb = rtnetdev_alloc_rtskb(dev, np->rx_buf_sz); /*** RTnet ***/ np->rx_skbuff[entry] = skb; if (skb == NULL) break; /* Better luck next round. */ np->rx_skbuff_dma[entry] = dma_map_single(&np->pdev->dev, skb->tail, np->rx_buf_sz, DMA_FROM_DEVICE); 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(readw((void *)dev->base_addr + ChipCmd) | CmdRxOn | CmdRxDemand, (void *)dev->base_addr + ChipCmd); } /* 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(void *ioaddr) { writel(0, ioaddr + RxMissed); readw(ioaddr + RxCRCErrs); readw(ioaddr + RxMissed); } static void via_rhine_restart_tx(struct rtnet_device *dev) { /*** RTnet ***/ struct netdev_private *np = dev->priv; void *ioaddr = (void *)dev->base_addr; int entry = np->dirty_tx % TX_RING_SIZE; u32 intr_status; /* * If new errors occured, we need to sort them out before doing Tx. * In that case the ISR will be back here RSN anyway. */ intr_status = get_intr_status(dev); if ((intr_status & IntrTxErrSummary) == 0) { /* We know better than the chip where it should continue. */ writel(np->tx_ring_dma + entry * sizeof(struct tx_desc), ioaddr + TxRingPtr); writew(CmdTxDemand | np->chip_cmd, ioaddr + ChipCmd); IOSYNC; } else { /* This should never happen */ if (local_debug > 1) rtdm_printk(KERN_WARNING "%s: via_rhine_restart_tx() " /*** RTnet ***/ "Another error occured %8.8x.\n", dev->name, intr_status); } } static void via_rhine_error(struct rtnet_device *dev, int intr_status) /*** RTnet ***/ { struct netdev_private *np = dev->priv; void *ioaddr = (void *)dev->base_addr; rtdm_lock_get(&np->lock); /*** RTnet ***/ if (intr_status & (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 (local_debug) rtdm_printk(KERN_ERR "%s: MII status changed: Autonegotiation " /*** RTnet ***/ "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 & IntrTxAborted) { if (local_debug > 1) rtdm_printk(KERN_INFO "%s: Abort %8.8x, frame dropped.\n", /*** RTnet ***/ dev->name, intr_status); } if (intr_status & IntrTxUnderrun) { if (np->tx_thresh < 0xE0) writeb(np->tx_thresh += 0x20, ioaddr + TxConfig); if (local_debug > 1) rtdm_printk(KERN_INFO "%s: Transmitter underrun, Tx " /*** RTnet ***/ "threshold now %2.2x.\n", dev->name, np->tx_thresh); } if (intr_status & IntrTxDescRace) { if (local_debug > 2) rtdm_printk(KERN_INFO "%s: Tx descriptor write-back race.\n", /*** RTnet ***/ dev->name); } if ((intr_status & IntrTxError) && ~( IntrTxAborted | IntrTxUnderrun | IntrTxDescRace )) { if (np->tx_thresh < 0xE0) { writeb(np->tx_thresh += 0x20, ioaddr + TxConfig); } if (local_debug > 1) rtdm_printk(KERN_INFO "%s: Unspecified error. Tx " /*** RTnet ***/ "threshold now %2.2x.\n", dev->name, np->tx_thresh); } if (intr_status & ( IntrTxAborted | IntrTxUnderrun | IntrTxDescRace | IntrTxError )) via_rhine_restart_tx(dev); if (intr_status & ~( IntrLinkChange | IntrStatsMax | IntrTxUnderrun | IntrTxError | IntrTxAborted | IntrNormalSummary | IntrTxDescRace )) { if (local_debug > 1) rtdm_printk(KERN_ERR "%s: Something Wicked happened! %8.8x.\n", /*** RTnet ***/ dev->name, intr_status); } rtdm_lock_put(&np->lock); /*** RTnet ***/ } static struct net_device_stats *via_rhine_get_stats(struct rtnet_device *rtdev) { struct netdev_private *np = rtdev->priv; long ioaddr = rtdev->base_addr; rtdm_lockctx_t context; rtdm_lock_get_irqsave(&np->lock, context); np->stats.rx_crc_errors += readw(ioaddr + RxCRCErrs); np->stats.rx_missed_errors += readw(ioaddr + RxMissed); clear_tally_counters((void *)ioaddr); rtdm_lock_put_irqrestore(&np->lock, context); return &np->stats; } static void via_rhine_set_rx_mode(struct rtnet_device *dev) /*** RTnet ***/ { struct netdev_private *np = dev->priv; void *ioaddr = (void *)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; writel(0xffffffff, (void *)ioaddr + MulticastFilter0); writel(0xffffffff, (void *)ioaddr + MulticastFilter1); } else if (dev->flags & IFF_ALLMULTI) { /* Too many to match, or accept all multicasts. */ writel(0xffffffff, (void *)ioaddr + MulticastFilter0); writel(0xffffffff, (void *)ioaddr + MulticastFilter1); rx_mode = 0x0C; } else { memset(mc_filter, 0, sizeof(mc_filter)); writel(mc_filter[0], (void *)ioaddr + MulticastFilter0); writel(mc_filter[1], (void *)ioaddr + MulticastFilter1); rx_mode = 0x0C; } writeb(np->rx_thresh | rx_mode, (void *)ioaddr + RxConfig); } /*** RTnet ***/ /*** RTnet ***/ static int via_rhine_close(struct rtnet_device *dev) /*** RTnet ***/ { long ioaddr = dev->base_addr; struct netdev_private *np = dev->priv; int i; /*** RTnet ***/ rtdm_lockctx_t context; /*** RTnet *** del_timer_sync(&np->timer); *** RTnet ***/ rtdm_lock_get_irqsave(&np->lock, context); /*** RTnet ***/ rtnetif_stop_queue(dev); /*** RTnet ***/ if (local_debug > 1) rtdm_printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n", /*** RTnet ***/ dev->name, readw((void *)ioaddr + ChipCmd)); /* Switch to loopback mode to avoid hardware races. */ writeb(np->tx_thresh | 0x02, (void *)ioaddr + TxConfig); /* Disable interrupts by clearing the interrupt mask. */ writew(0x0000, (void *)ioaddr + IntrEnable); /* Stop the chip's Tx and Rx processes. */ writew(CmdStop, (void *)ioaddr + ChipCmd); rtdm_lock_put_irqrestore(&np->lock, context); /*** RTnet ***/ /*** RTnet ***/ if ( (i=rtdm_irq_free(&np->irq_handle))<0 ) return i; rt_stack_disconnect(dev); /*** RTnet ***/ free_rbufs(dev); free_tbufs(dev); free_ring(dev); return 0; } static void via_rhine_remove_one (struct pci_dev *pdev) { /*** RTnet ***/ struct rtnet_device *dev = pci_get_drvdata(pdev); rt_unregister_rtnetdev(dev); rt_rtdev_disconnect(dev); /*** RTnet ***/ pci_release_regions(pdev); #ifdef USE_MEM iounmap((char *)(dev->base_addr)); #endif rtdev_free(dev); /*** RTnet ***/ pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); } static struct pci_driver via_rhine_driver = { .name = DRV_NAME, .id_table = via_rhine_pci_tbl, .probe = via_rhine_init_one, .remove = 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_register_driver (&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: */