| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Torvalds (pre-git) | 7408 | 86.12% | 3 | 5.66% |
| Krzysztof Hałasa | 450 | 5.23% | 4 | 7.55% |
| Alan Cox | 206 | 2.39% | 1 | 1.89% |
| Stephen Hemminger | 172 | 2.00% | 2 | 3.77% |
| Adrian Bunk | 87 | 1.01% | 2 | 3.77% |
| Roel Kluin | 54 | 0.63% | 2 | 3.77% |
| Linus Torvalds | 48 | 0.56% | 6 | 11.32% |
| Arnaldo Carvalho de Melo | 29 | 0.34% | 7 | 13.21% |
| Kees Cook | 25 | 0.29% | 1 | 1.89% |
| Jeff Garzik | 24 | 0.28% | 1 | 1.89% |
| Andrew Morton | 17 | 0.20% | 1 | 1.89% |
| Amitoj Kaur Chawla | 17 | 0.20% | 1 | 1.89% |
| Vasyl Gomonovych | 9 | 0.10% | 1 | 1.89% |
| Allen Pais | 8 | 0.09% | 1 | 1.89% |
| Benoit Taine | 6 | 0.07% | 1 | 1.89% |
| Al Viro | 6 | 0.07% | 2 | 3.77% |
| Thomas Graf | 6 | 0.07% | 1 | 1.89% |
| David S. Miller | 5 | 0.06% | 1 | 1.89% |
| Eric Dumazet | 4 | 0.05% | 1 | 1.89% |
| Thomas Gleixner | 3 | 0.03% | 2 | 3.77% |
| Florian Westphal | 3 | 0.03% | 1 | 1.89% |
| Christoph Hellwig | 3 | 0.03% | 1 | 1.89% |
| Julia Lawall | 2 | 0.02% | 1 | 1.89% |
| Masanari Iida | 2 | 0.02% | 2 | 3.77% |
| Colin Ian King | 2 | 0.02% | 2 | 3.77% |
| Axel Lin | 2 | 0.02% | 1 | 1.89% |
| Wei Yang | 1 | 0.01% | 1 | 1.89% |
| Alexey Dobriyan | 1 | 0.01% | 1 | 1.89% |
| Steven Cole | 1 | 0.01% | 1 | 1.89% |
| André Goddard Rosa | 1 | 0.01% | 1 | 1.89% |
| Total | 8602 | 53 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 1997-2000 LAN Media Corporation (LMC) * All rights reserved. www.lanmedia.com * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl> * * This code is written by: * Andrew Stanley-Jones (asj@cban.com) * Rob Braun (bbraun@vix.com), * Michael Graff (explorer@vix.com) and * Matt Thomas (matt@3am-software.com). * * With Help By: * David Boggs * Ron Crane * Alan Cox * * Driver for the LanMedia LMC5200, LMC5245, LMC1000, LMC1200 cards. * * To control link specific options lmcctl is required. * It can be obtained from ftp.lanmedia.com. * * Linux driver notes: * Linux uses the device struct lmc_private to pass private information * around. * * The initialization portion of this driver (the lmc_reset() and the * lmc_dec_reset() functions, as well as the led controls and the * lmc_initcsrs() functions. * * The watchdog function runs every second and checks to see if * we still have link, and that the timing source is what we expected * it to be. If link is lost, the interface is marked down, and * we no longer can transmit. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/ptrace.h> #include <linux/errno.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/pci.h> #include <linux/delay.h> #include <linux/hdlc.h> #include <linux/in.h> #include <linux/if_arp.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <linux/inet.h> #include <linux/bitops.h> #include <asm/processor.h> /* Processor type for cache alignment. */ #include <asm/io.h> #include <asm/dma.h> #include <linux/uaccess.h> //#include <asm/spinlock.h> #define DRIVER_MAJOR_VERSION 1 #define DRIVER_MINOR_VERSION 34 #define DRIVER_SUB_VERSION 0 #define DRIVER_VERSION ((DRIVER_MAJOR_VERSION << 8) + DRIVER_MINOR_VERSION) #include "lmc.h" #include "lmc_var.h" #include "lmc_ioctl.h" #include "lmc_debug.h" #include "lmc_proto.h" static int LMC_PKT_BUF_SZ = 1542; static const struct pci_device_id lmc_pci_tbl[] = { { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST, PCI_VENDOR_ID_LMC, PCI_ANY_ID }, { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST, PCI_ANY_ID, PCI_VENDOR_ID_LMC }, { 0 } }; MODULE_DEVICE_TABLE(pci, lmc_pci_tbl); MODULE_LICENSE("GPL v2"); static netdev_tx_t lmc_start_xmit(struct sk_buff *skb, struct net_device *dev); static int lmc_rx (struct net_device *dev); static int lmc_open(struct net_device *dev); static int lmc_close(struct net_device *dev); static struct net_device_stats *lmc_get_stats(struct net_device *dev); static irqreturn_t lmc_interrupt(int irq, void *dev_instance); static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, size_t csr_size); static void lmc_softreset(lmc_softc_t * const); static void lmc_running_reset(struct net_device *dev); static int lmc_ifdown(struct net_device * const); static void lmc_watchdog(struct timer_list *t); static void lmc_reset(lmc_softc_t * const sc); static void lmc_dec_reset(lmc_softc_t * const sc); static void lmc_driver_timeout(struct net_device *dev); /* * linux reserves 16 device specific IOCTLs. We call them * LMCIOC* to control various bits of our world. */ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/ { lmc_softc_t *sc = dev_to_sc(dev); lmc_ctl_t ctl; int ret = -EOPNOTSUPP; u16 regVal; unsigned long flags; lmc_trace(dev, "lmc_ioctl in"); /* * Most functions mess with the structure * Disable interrupts while we do the polling */ switch (cmd) { /* * Return current driver state. Since we keep this up * To date internally, just copy this out to the user. */ case LMCIOCGINFO: /*fold01*/ if (copy_to_user(ifr->ifr_data, &sc->ictl, sizeof(lmc_ctl_t))) ret = -EFAULT; else ret = 0; break; case LMCIOCSINFO: /*fold01*/ if (!capable(CAP_NET_ADMIN)) { ret = -EPERM; break; } if(dev->flags & IFF_UP){ ret = -EBUSY; break; } if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) { ret = -EFAULT; break; } spin_lock_irqsave(&sc->lmc_lock, flags); sc->lmc_media->set_status (sc, &ctl); if(ctl.crc_length != sc->ictl.crc_length) { sc->lmc_media->set_crc_length(sc, ctl.crc_length); if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE; else sc->TxDescriptControlInit &= ~LMC_TDES_ADD_CRC_DISABLE; } spin_unlock_irqrestore(&sc->lmc_lock, flags); ret = 0; break; case LMCIOCIFTYPE: /*fold01*/ { u16 old_type = sc->if_type; u16 new_type; if (!capable(CAP_NET_ADMIN)) { ret = -EPERM; break; } if (copy_from_user(&new_type, ifr->ifr_data, sizeof(u16))) { ret = -EFAULT; break; } if (new_type == old_type) { ret = 0 ; break; /* no change */ } spin_lock_irqsave(&sc->lmc_lock, flags); lmc_proto_close(sc); sc->if_type = new_type; lmc_proto_attach(sc); ret = lmc_proto_open(sc); spin_unlock_irqrestore(&sc->lmc_lock, flags); break; } case LMCIOCGETXINFO: /*fold01*/ spin_lock_irqsave(&sc->lmc_lock, flags); sc->lmc_xinfo.Magic0 = 0xBEEFCAFE; sc->lmc_xinfo.PciCardType = sc->lmc_cardtype; sc->lmc_xinfo.PciSlotNumber = 0; sc->lmc_xinfo.DriverMajorVersion = DRIVER_MAJOR_VERSION; sc->lmc_xinfo.DriverMinorVersion = DRIVER_MINOR_VERSION; sc->lmc_xinfo.DriverSubVersion = DRIVER_SUB_VERSION; sc->lmc_xinfo.XilinxRevisionNumber = lmc_mii_readreg (sc, 0, 3) & 0xf; sc->lmc_xinfo.MaxFrameSize = LMC_PKT_BUF_SZ; sc->lmc_xinfo.link_status = sc->lmc_media->get_link_status (sc); sc->lmc_xinfo.mii_reg16 = lmc_mii_readreg (sc, 0, 16); spin_unlock_irqrestore(&sc->lmc_lock, flags); sc->lmc_xinfo.Magic1 = 0xDEADBEEF; if (copy_to_user(ifr->ifr_data, &sc->lmc_xinfo, sizeof(struct lmc_xinfo))) ret = -EFAULT; else ret = 0; break; case LMCIOCGETLMCSTATS: spin_lock_irqsave(&sc->lmc_lock, flags); if (sc->lmc_cardtype == LMC_CARDTYPE_T1) { lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_LSB); sc->extra_stats.framingBitErrorCount += lmc_mii_readreg(sc, 0, 18) & 0xff; lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_MSB); sc->extra_stats.framingBitErrorCount += (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8; lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_LSB); sc->extra_stats.lineCodeViolationCount += lmc_mii_readreg(sc, 0, 18) & 0xff; lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_MSB); sc->extra_stats.lineCodeViolationCount += (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8; lmc_mii_writereg(sc, 0, 17, T1FRAMER_AERR); regVal = lmc_mii_readreg(sc, 0, 18) & 0xff; sc->extra_stats.lossOfFrameCount += (regVal & T1FRAMER_LOF_MASK) >> 4; sc->extra_stats.changeOfFrameAlignmentCount += (regVal & T1FRAMER_COFA_MASK) >> 2; sc->extra_stats.severelyErroredFrameCount += regVal & T1FRAMER_SEF_MASK; } spin_unlock_irqrestore(&sc->lmc_lock, flags); if (copy_to_user(ifr->ifr_data, &sc->lmc_device->stats, sizeof(sc->lmc_device->stats)) || copy_to_user(ifr->ifr_data + sizeof(sc->lmc_device->stats), &sc->extra_stats, sizeof(sc->extra_stats))) ret = -EFAULT; else ret = 0; break; case LMCIOCCLEARLMCSTATS: if (!capable(CAP_NET_ADMIN)) { ret = -EPERM; break; } spin_lock_irqsave(&sc->lmc_lock, flags); memset(&sc->lmc_device->stats, 0, sizeof(sc->lmc_device->stats)); memset(&sc->extra_stats, 0, sizeof(sc->extra_stats)); sc->extra_stats.check = STATCHECK; sc->extra_stats.version_size = (DRIVER_VERSION << 16) + sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats); sc->extra_stats.lmc_cardtype = sc->lmc_cardtype; spin_unlock_irqrestore(&sc->lmc_lock, flags); ret = 0; break; case LMCIOCSETCIRCUIT: /*fold01*/ if (!capable(CAP_NET_ADMIN)){ ret = -EPERM; break; } if(dev->flags & IFF_UP){ ret = -EBUSY; break; } if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) { ret = -EFAULT; break; } spin_lock_irqsave(&sc->lmc_lock, flags); sc->lmc_media->set_circuit_type(sc, ctl.circuit_type); sc->ictl.circuit_type = ctl.circuit_type; spin_unlock_irqrestore(&sc->lmc_lock, flags); ret = 0; break; case LMCIOCRESET: /*fold01*/ if (!capable(CAP_NET_ADMIN)){ ret = -EPERM; break; } spin_lock_irqsave(&sc->lmc_lock, flags); /* Reset driver and bring back to current state */ printk (" REG16 before reset +%04x\n", lmc_mii_readreg (sc, 0, 16)); lmc_running_reset (dev); printk (" REG16 after reset +%04x\n", lmc_mii_readreg (sc, 0, 16)); LMC_EVENT_LOG(LMC_EVENT_FORCEDRESET, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16)); spin_unlock_irqrestore(&sc->lmc_lock, flags); ret = 0; break; #ifdef DEBUG case LMCIOCDUMPEVENTLOG: if (copy_to_user(ifr->ifr_data, &lmcEventLogIndex, sizeof(u32))) { ret = -EFAULT; break; } if (copy_to_user(ifr->ifr_data + sizeof(u32), lmcEventLogBuf, sizeof(lmcEventLogBuf))) ret = -EFAULT; else ret = 0; break; #endif /* end ifdef _DBG_EVENTLOG */ case LMCIOCT1CONTROL: /*fold01*/ if (sc->lmc_cardtype != LMC_CARDTYPE_T1){ ret = -EOPNOTSUPP; break; } break; case LMCIOCXILINX: /*fold01*/ { struct lmc_xilinx_control xc; /*fold02*/ if (!capable(CAP_NET_ADMIN)){ ret = -EPERM; break; } /* * Stop the xwitter whlie we restart the hardware */ netif_stop_queue(dev); if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) { ret = -EFAULT; break; } switch(xc.command){ case lmc_xilinx_reset: /*fold02*/ { u16 mii; spin_lock_irqsave(&sc->lmc_lock, flags); mii = lmc_mii_readreg (sc, 0, 16); /* * Make all of them 0 and make input */ lmc_gpio_mkinput(sc, 0xff); /* * make the reset output */ lmc_gpio_mkoutput(sc, LMC_GEP_RESET); /* * RESET low to force configuration. This also forces * the transmitter clock to be internal, but we expect to reset * that later anyway. */ sc->lmc_gpio &= ~LMC_GEP_RESET; LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); /* * hold for more than 10 microseconds */ udelay(50); sc->lmc_gpio |= LMC_GEP_RESET; LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); /* * stop driving Xilinx-related signals */ lmc_gpio_mkinput(sc, 0xff); /* Reset the frammer hardware */ sc->lmc_media->set_link_status (sc, 1); sc->lmc_media->set_status (sc, NULL); // lmc_softreset(sc); { int i; for(i = 0; i < 5; i++){ lmc_led_on(sc, LMC_DS3_LED0); mdelay(100); lmc_led_off(sc, LMC_DS3_LED0); lmc_led_on(sc, LMC_DS3_LED1); mdelay(100); lmc_led_off(sc, LMC_DS3_LED1); lmc_led_on(sc, LMC_DS3_LED3); mdelay(100); lmc_led_off(sc, LMC_DS3_LED3); lmc_led_on(sc, LMC_DS3_LED2); mdelay(100); lmc_led_off(sc, LMC_DS3_LED2); } } spin_unlock_irqrestore(&sc->lmc_lock, flags); ret = 0x0; } break; case lmc_xilinx_load_prom: /*fold02*/ { u16 mii; int timeout = 500000; spin_lock_irqsave(&sc->lmc_lock, flags); mii = lmc_mii_readreg (sc, 0, 16); /* * Make all of them 0 and make input */ lmc_gpio_mkinput(sc, 0xff); /* * make the reset output */ lmc_gpio_mkoutput(sc, LMC_GEP_DP | LMC_GEP_RESET); /* * RESET low to force configuration. This also forces * the transmitter clock to be internal, but we expect to reset * that later anyway. */ sc->lmc_gpio &= ~(LMC_GEP_RESET | LMC_GEP_DP); LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); /* * hold for more than 10 microseconds */ udelay(50); sc->lmc_gpio |= LMC_GEP_DP | LMC_GEP_RESET; LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); /* * busy wait for the chip to reset */ while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 && (timeout-- > 0)) cpu_relax(); /* * stop driving Xilinx-related signals */ lmc_gpio_mkinput(sc, 0xff); spin_unlock_irqrestore(&sc->lmc_lock, flags); ret = 0x0; break; } case lmc_xilinx_load: /*fold02*/ { char *data; int pos; int timeout = 500000; if (!xc.data) { ret = -EINVAL; break; } data = memdup_user(xc.data, xc.len); if (IS_ERR(data)) { ret = PTR_ERR(data); break; } printk("%s: Starting load of data Len: %d at 0x%p == 0x%p\n", dev->name, xc.len, xc.data, data); spin_lock_irqsave(&sc->lmc_lock, flags); lmc_gpio_mkinput(sc, 0xff); /* * Clear the Xilinx and start prgramming from the DEC */ /* * Set ouput as: * Reset: 0 (active) * DP: 0 (active) * Mode: 1 * */ sc->lmc_gpio = 0x00; sc->lmc_gpio &= ~LMC_GEP_DP; sc->lmc_gpio &= ~LMC_GEP_RESET; sc->lmc_gpio |= LMC_GEP_MODE; LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); lmc_gpio_mkoutput(sc, LMC_GEP_MODE | LMC_GEP_DP | LMC_GEP_RESET); /* * Wait at least 10 us 20 to be safe */ udelay(50); /* * Clear reset and activate programming lines * Reset: Input * DP: Input * Clock: Output * Data: Output * Mode: Output */ lmc_gpio_mkinput(sc, LMC_GEP_DP | LMC_GEP_RESET); /* * Set LOAD, DATA, Clock to 1 */ sc->lmc_gpio = 0x00; sc->lmc_gpio |= LMC_GEP_MODE; sc->lmc_gpio |= LMC_GEP_DATA; sc->lmc_gpio |= LMC_GEP_CLK; LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); lmc_gpio_mkoutput(sc, LMC_GEP_DATA | LMC_GEP_CLK | LMC_GEP_MODE ); /* * busy wait for the chip to reset */ while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 && (timeout-- > 0)) cpu_relax(); printk(KERN_DEBUG "%s: Waited %d for the Xilinx to clear it's memory\n", dev->name, 500000-timeout); for(pos = 0; pos < xc.len; pos++){ switch(data[pos]){ case 0: sc->lmc_gpio &= ~LMC_GEP_DATA; /* Data is 0 */ break; case 1: sc->lmc_gpio |= LMC_GEP_DATA; /* Data is 1 */ break; default: printk(KERN_WARNING "%s Bad data in xilinx programming data at %d, got %d wanted 0 or 1\n", dev->name, pos, data[pos]); sc->lmc_gpio |= LMC_GEP_DATA; /* Assume it's 1 */ } sc->lmc_gpio &= ~LMC_GEP_CLK; /* Clock to zero */ sc->lmc_gpio |= LMC_GEP_MODE; LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); udelay(1); sc->lmc_gpio |= LMC_GEP_CLK; /* Put the clack back to one */ sc->lmc_gpio |= LMC_GEP_MODE; LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); udelay(1); } if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0){ printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (corrupted data)\n", dev->name); } else if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_DP) == 0){ printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (done)\n", dev->name); } else { printk(KERN_DEBUG "%s: Done reprogramming Xilinx, %d bits, good luck!\n", dev->name, pos); } lmc_gpio_mkinput(sc, 0xff); sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET; lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16); sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET; lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16); spin_unlock_irqrestore(&sc->lmc_lock, flags); kfree(data); ret = 0; break; } default: /*fold02*/ ret = -EBADE; break; } netif_wake_queue(dev); sc->lmc_txfull = 0; } break; default: /*fold01*/ /* If we don't know what to do, give the protocol a shot. */ ret = lmc_proto_ioctl (sc, ifr, cmd); break; } lmc_trace(dev, "lmc_ioctl out"); return ret; } /* the watchdog process that cruises around */ static void lmc_watchdog(struct timer_list *t) /*fold00*/ { lmc_softc_t *sc = from_timer(sc, t, timer); struct net_device *dev = sc->lmc_device; int link_status; u32 ticks; unsigned long flags; lmc_trace(dev, "lmc_watchdog in"); spin_lock_irqsave(&sc->lmc_lock, flags); if(sc->check != 0xBEAFCAFE){ printk("LMC: Corrupt net_device struct, breaking out\n"); spin_unlock_irqrestore(&sc->lmc_lock, flags); return; } /* Make sure the tx jabber and rx watchdog are off, * and the transmit and receive processes are running. */ LMC_CSR_WRITE (sc, csr_15, 0x00000011); sc->lmc_cmdmode |= TULIP_CMD_TXRUN | TULIP_CMD_RXRUN; LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode); if (sc->lmc_ok == 0) goto kick_timer; LMC_EVENT_LOG(LMC_EVENT_WATCHDOG, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16)); /* --- begin time out check ----------------------------------- * check for a transmit interrupt timeout * Has the packet xmt vs xmt serviced threshold been exceeded */ if (sc->lmc_taint_tx == sc->lastlmc_taint_tx && sc->lmc_device->stats.tx_packets > sc->lasttx_packets && sc->tx_TimeoutInd == 0) { /* wait for the watchdog to come around again */ sc->tx_TimeoutInd = 1; } else if (sc->lmc_taint_tx == sc->lastlmc_taint_tx && sc->lmc_device->stats.tx_packets > sc->lasttx_packets && sc->tx_TimeoutInd) { LMC_EVENT_LOG(LMC_EVENT_XMTINTTMO, LMC_CSR_READ (sc, csr_status), 0); sc->tx_TimeoutDisplay = 1; sc->extra_stats.tx_TimeoutCnt++; /* DEC chip is stuck, hit it with a RESET!!!! */ lmc_running_reset (dev); /* look at receive & transmit process state to make sure they are running */ LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0); /* look at: DSR - 02 for Reg 16 * CTS - 08 * DCD - 10 * RI - 20 * for Reg 17 */ LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg (sc, 0, 16), lmc_mii_readreg (sc, 0, 17)); /* reset the transmit timeout detection flag */ sc->tx_TimeoutInd = 0; sc->lastlmc_taint_tx = sc->lmc_taint_tx; sc->lasttx_packets = sc->lmc_device->stats.tx_packets; } else { sc->tx_TimeoutInd = 0; sc->lastlmc_taint_tx = sc->lmc_taint_tx; sc->lasttx_packets = sc->lmc_device->stats.tx_packets; } /* --- end time out check ----------------------------------- */ link_status = sc->lmc_media->get_link_status (sc); /* * hardware level link lost, but the interface is marked as up. * Mark it as down. */ if ((link_status == 0) && (sc->last_link_status != 0)) { printk(KERN_WARNING "%s: hardware/physical link down\n", dev->name); sc->last_link_status = 0; /* lmc_reset (sc); Why reset??? The link can go down ok */ /* Inform the world that link has been lost */ netif_carrier_off(dev); } /* * hardware link is up, but the interface is marked as down. * Bring it back up again. */ if (link_status != 0 && sc->last_link_status == 0) { printk(KERN_WARNING "%s: hardware/physical link up\n", dev->name); sc->last_link_status = 1; /* lmc_reset (sc); Again why reset??? */ netif_carrier_on(dev); } /* Call media specific watchdog functions */ sc->lmc_media->watchdog(sc); /* * Poke the transmitter to make sure it * never stops, even if we run out of mem */ LMC_CSR_WRITE(sc, csr_rxpoll, 0); /* * Check for code that failed * and try and fix it as appropriate */ if(sc->failed_ring == 1){ /* * Failed to setup the recv/xmit rin * Try again */ sc->failed_ring = 0; lmc_softreset(sc); } if(sc->failed_recv_alloc == 1){ /* * We failed to alloc mem in the * interrupt handler, go through the rings * and rebuild them */ sc->failed_recv_alloc = 0; lmc_softreset(sc); } /* * remember the timer value */ kick_timer: ticks = LMC_CSR_READ (sc, csr_gp_timer); LMC_CSR_WRITE (sc, csr_gp_timer, 0xffffffffUL); sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff); /* * restart this timer. */ sc->timer.expires = jiffies + (HZ); add_timer (&sc->timer); spin_unlock_irqrestore(&sc->lmc_lock, flags); lmc_trace(dev, "lmc_watchdog out"); } static int lmc_attach(struct net_device *dev, unsigned short encoding, unsigned short parity) { if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT) return 0; return -EINVAL; } static const struct net_device_ops lmc_ops = { .ndo_open = lmc_open, .ndo_stop = lmc_close, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = lmc_ioctl, .ndo_tx_timeout = lmc_driver_timeout, .ndo_get_stats = lmc_get_stats, }; static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { lmc_softc_t *sc; struct net_device *dev; u16 subdevice; u16 AdapModelNum; int err; static int cards_found; /* lmc_trace(dev, "lmc_init_one in"); */ err = pcim_enable_device(pdev); if (err) { printk(KERN_ERR "lmc: pci enable failed: %d\n", err); return err; } err = pci_request_regions(pdev, "lmc"); if (err) { printk(KERN_ERR "lmc: pci_request_region failed\n"); return err; } /* * Allocate our own device structure */ sc = devm_kzalloc(&pdev->dev, sizeof(lmc_softc_t), GFP_KERNEL); if (!sc) return -ENOMEM; dev = alloc_hdlcdev(sc); if (!dev) { printk(KERN_ERR "lmc:alloc_netdev for device failed\n"); return -ENOMEM; } dev->type = ARPHRD_HDLC; dev_to_hdlc(dev)->xmit = lmc_start_xmit; dev_to_hdlc(dev)->attach = lmc_attach; dev->netdev_ops = &lmc_ops; dev->watchdog_timeo = HZ; /* 1 second */ dev->tx_queue_len = 100; sc->lmc_device = dev; sc->name = dev->name; sc->if_type = LMC_PPP; sc->check = 0xBEAFCAFE; dev->base_addr = pci_resource_start(pdev, 0); dev->irq = pdev->irq; pci_set_drvdata(pdev, dev); SET_NETDEV_DEV(dev, &pdev->dev); /* * This will get the protocol layer ready and do any 1 time init's * Must have a valid sc and dev structure */ lmc_proto_attach(sc); /* Init the spin lock so can call it latter */ spin_lock_init(&sc->lmc_lock); pci_set_master(pdev); printk(KERN_INFO "%s: detected at %lx, irq %d\n", dev->name, dev->base_addr, dev->irq); err = register_hdlc_device(dev); if (err) { printk(KERN_ERR "%s: register_netdev failed.\n", dev->name); free_netdev(dev); return err; } sc->lmc_cardtype = LMC_CARDTYPE_UNKNOWN; sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT; /* * * Check either the subvendor or the subdevice, some systems reverse * the setting in the bois, seems to be version and arch dependent? * Fix the error, exchange the two values */ if ((subdevice = pdev->subsystem_device) == PCI_VENDOR_ID_LMC) subdevice = pdev->subsystem_vendor; switch (subdevice) { case PCI_DEVICE_ID_LMC_HSSI: printk(KERN_INFO "%s: LMC HSSI\n", dev->name); sc->lmc_cardtype = LMC_CARDTYPE_HSSI; sc->lmc_media = &lmc_hssi_media; break; case PCI_DEVICE_ID_LMC_DS3: printk(KERN_INFO "%s: LMC DS3\n", dev->name); sc->lmc_cardtype = LMC_CARDTYPE_DS3; sc->lmc_media = &lmc_ds3_media; break; case PCI_DEVICE_ID_LMC_SSI: printk(KERN_INFO "%s: LMC SSI\n", dev->name); sc->lmc_cardtype = LMC_CARDTYPE_SSI; sc->lmc_media = &lmc_ssi_media; break; case PCI_DEVICE_ID_LMC_T1: printk(KERN_INFO "%s: LMC T1\n", dev->name); sc->lmc_cardtype = LMC_CARDTYPE_T1; sc->lmc_media = &lmc_t1_media; break; default: printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name); break; } lmc_initcsrs (sc, dev->base_addr, 8); lmc_gpio_mkinput (sc, 0xff); sc->lmc_gpio = 0; /* drive no signals yet */ sc->lmc_media->defaults (sc); sc->lmc_media->set_link_status (sc, LMC_LINK_UP); /* verify that the PCI Sub System ID matches the Adapter Model number * from the MII register */ AdapModelNum = (lmc_mii_readreg (sc, 0, 3) & 0x3f0) >> 4; if ((AdapModelNum != LMC_ADAP_T1 || /* detect LMC1200 */ subdevice != PCI_DEVICE_ID_LMC_T1) && (AdapModelNum != LMC_ADAP_SSI || /* detect LMC1000 */ subdevice != PCI_DEVICE_ID_LMC_SSI) && (AdapModelNum != LMC_ADAP_DS3 || /* detect LMC5245 */ subdevice != PCI_DEVICE_ID_LMC_DS3) && (AdapModelNum != LMC_ADAP_HSSI || /* detect LMC5200 */ subdevice != PCI_DEVICE_ID_LMC_HSSI)) printk(KERN_WARNING "%s: Model number (%d) miscompare for PCI" " Subsystem ID = 0x%04x\n", dev->name, AdapModelNum, subdevice); /* * reset clock */ LMC_CSR_WRITE (sc, csr_gp_timer, 0xFFFFFFFFUL); sc->board_idx = cards_found++; sc->extra_stats.check = STATCHECK; sc->extra_stats.version_size = (DRIVER_VERSION << 16) + sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats); sc->extra_stats.lmc_cardtype = sc->lmc_cardtype; sc->lmc_ok = 0; sc->last_link_status = 0; lmc_trace(dev, "lmc_init_one out"); return 0; } /* * Called from pci when removing module. */ static void lmc_remove_one(struct pci_dev *pdev) { struct net_device *dev = pci_get_drvdata(pdev); if (dev) { printk(KERN_DEBUG "%s: removing...\n", dev->name); unregister_hdlc_device(dev); free_netdev(dev); } } /* After this is called, packets can be sent. * Does not initialize the addresses */ static int lmc_open(struct net_device *dev) { lmc_softc_t *sc = dev_to_sc(dev); int err; lmc_trace(dev, "lmc_open in"); lmc_led_on(sc, LMC_DS3_LED0); lmc_dec_reset(sc); lmc_reset(sc); LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ(sc, csr_status), 0); LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg(sc, 0, 16), lmc_mii_readreg(sc, 0, 17)); if (sc->lmc_ok){ lmc_trace(dev, "lmc_open lmc_ok out"); return 0; } lmc_softreset (sc); /* Since we have to use PCI bus, this should work on x86,alpha,ppc */ if (request_irq (dev->irq, lmc_interrupt, IRQF_SHARED, dev->name, dev)){ printk(KERN_WARNING "%s: could not get irq: %d\n", dev->name, dev->irq); lmc_trace(dev, "lmc_open irq failed out"); return -EAGAIN; } sc->got_irq = 1; /* Assert Terminal Active */ sc->lmc_miireg16 |= LMC_MII16_LED_ALL; sc->lmc_media->set_link_status (sc, LMC_LINK_UP); /* * reset to last state. */ sc->lmc_media->set_status (sc, NULL); /* setup default bits to be used in tulip_desc_t transmit descriptor * -baz */ sc->TxDescriptControlInit = ( LMC_TDES_INTERRUPT_ON_COMPLETION | LMC_TDES_FIRST_SEGMENT | LMC_TDES_LAST_SEGMENT | LMC_TDES_SECOND_ADDR_CHAINED | LMC_TDES_DISABLE_PADDING ); if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) { /* disable 32 bit CRC generated by ASIC */ sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE; } sc->lmc_media->set_crc_length(sc, sc->ictl.crc_length); /* Acknoledge the Terminal Active and light LEDs */ /* dev->flags |= IFF_UP; */ if ((err = lmc_proto_open(sc)) != 0) return err; netif_start_queue(dev); sc->extra_stats.tx_tbusy0++; /* * select what interrupts we want to get */ sc->lmc_intrmask = 0; /* Should be using the default interrupt mask defined in the .h file. */ sc->lmc_intrmask |= (TULIP_STS_NORMALINTR | TULIP_STS_RXINTR | TULIP_STS_TXINTR | TULIP_STS_ABNRMLINTR | TULIP_STS_SYSERROR | TULIP_STS_TXSTOPPED | TULIP_STS_TXUNDERFLOW | TULIP_STS_RXSTOPPED | TULIP_STS_RXNOBUF ); LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask); sc->lmc_cmdmode |= TULIP_CMD_TXRUN; sc->lmc_cmdmode |= TULIP_CMD_RXRUN; LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode); sc->lmc_ok = 1; /* Run watchdog */ /* * Set the if up now - pfb */ sc->last_link_status = 1; /* * Setup a timer for the watchdog on probe, and start it running. * Since lmc_ok == 0, it will be a NOP for now. */ timer_setup(&sc->timer, lmc_watchdog, 0); sc->timer.expires = jiffies + HZ; add_timer (&sc->timer); lmc_trace(dev, "lmc_open out"); return 0; } /* Total reset to compensate for the AdTran DSU doing bad things * under heavy load */ static void lmc_running_reset (struct net_device *dev) /*fold00*/ { lmc_softc_t *sc = dev_to_sc(dev); lmc_trace(dev, "lmc_running_reset in"); /* stop interrupts */ /* Clear the interrupt mask */ LMC_CSR_WRITE (sc, csr_intr, 0x00000000); lmc_dec_reset (sc); lmc_reset (sc); lmc_softreset (sc); /* sc->lmc_miireg16 |= LMC_MII16_LED_ALL; */ sc->lmc_media->set_link_status (sc, 1); sc->lmc_media->set_status (sc, NULL); netif_wake_queue(dev); sc->lmc_txfull = 0; sc->extra_stats.tx_tbusy0++; sc->lmc_intrmask = TULIP_DEFAULT_INTR_MASK; LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask); sc->lmc_cmdmode |= (TULIP_CMD_TXRUN | TULIP_CMD_RXRUN); LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode); lmc_trace(dev, "lmc_running_reset_out"); } /* This is what is called when you ifconfig down a device. * This disables the timer for the watchdog and keepalives, * and disables the irq for dev. */ static int lmc_close(struct net_device *dev) { /* not calling release_region() as we should */ lmc_softc_t *sc = dev_to_sc(dev); lmc_trace(dev, "lmc_close in"); sc->lmc_ok = 0; sc->lmc_media->set_link_status (sc, 0); del_timer (&sc->timer); lmc_proto_close(sc); lmc_ifdown (dev); lmc_trace(dev, "lmc_close out"); return 0; } /* Ends the transfer of packets */ /* When the interface goes down, this is called */ static int lmc_ifdown (struct net_device *dev) /*fold00*/ { lmc_softc_t *sc = dev_to_sc(dev); u32 csr6; int i; lmc_trace(dev, "lmc_ifdown in"); /* Don't let anything else go on right now */ // dev->start = 0; netif_stop_queue(dev); sc->extra_stats.tx_tbusy1++; /* stop interrupts */ /* Clear the interrupt mask */ LMC_CSR_WRITE (sc, csr_intr, 0x00000000); /* Stop Tx and Rx on the chip */ csr6 = LMC_CSR_READ (sc, csr_command); csr6 &= ~LMC_DEC_ST; /* Turn off the Transmission bit */ csr6 &= ~LMC_DEC_SR; /* Turn off the Receive bit */ LMC_CSR_WRITE (sc, csr_command, csr6); sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff; /* release the interrupt */ if(sc->got_irq == 1){ free_irq (dev->irq, dev); sc->got_irq = 0; } /* free skbuffs in the Rx queue */ for (i = 0; i < LMC_RXDESCS; i++) { struct sk_buff *skb = sc->lmc_rxq[i]; sc->lmc_rxq[i] = NULL; sc->lmc_rxring[i].status = 0; sc->lmc_rxring[i].length = 0; sc->lmc_rxring[i].buffer1 = 0xDEADBEEF; if (skb != NULL) dev_kfree_skb(skb); sc->lmc_rxq[i] = NULL; } for (i = 0; i < LMC_TXDESCS; i++) { if (sc->lmc_txq[i] != NULL) dev_kfree_skb(sc->lmc_txq[i]); sc->lmc_txq[i] = NULL; } lmc_led_off (sc, LMC_MII16_LED_ALL); netif_wake_queue(dev); sc->extra_stats.tx_tbusy0++; lmc_trace(dev, "lmc_ifdown out"); return 0; } /* Interrupt handling routine. This will take an incoming packet, or clean * up after a trasmit. */ static irqreturn_t lmc_interrupt (int irq, void *dev_instance) /*fold00*/ { struct net_device *dev = (struct net_device *) dev_instance; lmc_softc_t *sc = dev_to_sc(dev); u32 csr; int i; s32 stat; unsigned int badtx; u32 firstcsr; int max_work = LMC_RXDESCS; int handled = 0; lmc_trace(dev, "lmc_interrupt in"); spin_lock(&sc->lmc_lock); /* * Read the csr to find what interrupts we have (if any) */ csr = LMC_CSR_READ (sc, csr_status); /* * Make sure this is our interrupt */ if ( ! (csr & sc->lmc_intrmask)) { goto lmc_int_fail_out; } firstcsr = csr; /* always go through this loop at least once */ while (csr & sc->lmc_intrmask) { handled = 1; /* * Clear interrupt bits, we handle all case below */ LMC_CSR_WRITE (sc, csr_status, csr); /* * One of * - Transmit process timed out CSR5<1> * - Transmit jabber timeout CSR5<3> * - Transmit underflow CSR5<5> * - Transmit Receiver buffer unavailable CSR5<7> * - Receive process stopped CSR5<8> * - Receive watchdog timeout CSR5<9> * - Early transmit interrupt CSR5<10> * * Is this really right? Should we do a running reset for jabber? * (being a WAN card and all) */ if (csr & TULIP_STS_ABNRMLINTR){ lmc_running_reset (dev); break; } if (csr & TULIP_STS_RXINTR){ lmc_trace(dev, "rx interrupt"); lmc_rx (dev); } if (csr & (TULIP_STS_TXINTR | TULIP_STS_TXNOBUF | TULIP_STS_TXSTOPPED)) { int n_compl = 0 ; /* reset the transmit timeout detection flag -baz */ sc->extra_stats.tx_NoCompleteCnt = 0; badtx = sc->lmc_taint_tx; i = badtx % LMC_TXDESCS; while ((badtx < sc->lmc_next_tx)) { stat = sc->lmc_txring[i].status; LMC_EVENT_LOG (LMC_EVENT_XMTINT, stat, sc->lmc_txring[i].length); /* * If bit 31 is 1 the tulip owns it break out of the loop */ if (stat & 0x80000000) break; n_compl++ ; /* i.e., have an empty slot in ring */ /* * If we have no skbuff or have cleared it * Already continue to the next buffer */ if (sc->lmc_txq[i] == NULL) continue; /* * Check the total error summary to look for any errors */ if (stat & 0x8000) { sc->lmc_device->stats.tx_errors++; if (stat & 0x4104) sc->lmc_device->stats.tx_aborted_errors++; if (stat & 0x0C00) sc->lmc_device->stats.tx_carrier_errors++; if (stat & 0x0200) sc->lmc_device->stats.tx_window_errors++; if (stat & 0x0002) sc->lmc_device->stats.tx_fifo_errors++; } else { sc->lmc_device->stats.tx_bytes += sc->lmc_txring[i].length & 0x7ff; sc->lmc_device->stats.tx_packets++; } dev_consume_skb_irq(sc->lmc_txq[i]); sc->lmc_txq[i] = NULL; badtx++; i = badtx % LMC_TXDESCS; } if (sc->lmc_next_tx - badtx > LMC_TXDESCS) { printk ("%s: out of sync pointer\n", dev->name); badtx += LMC_TXDESCS; } LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0); sc->lmc_txfull = 0; netif_wake_queue(dev); sc->extra_stats.tx_tbusy0++; #ifdef DEBUG sc->extra_stats.dirtyTx = badtx; sc->extra_stats.lmc_next_tx = sc->lmc_next_tx; sc->extra_stats.lmc_txfull = sc->lmc_txfull; #endif sc->lmc_taint_tx = badtx; /* * Why was there a break here??? */ } /* end handle transmit interrupt */ if (csr & TULIP_STS_SYSERROR) { u32 error; printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr); error = csr>>23 & 0x7; switch(error){ case 0x000: printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name); break; case 0x001: printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name); break; case 0x002: printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name); break; default: printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name); } lmc_dec_reset (sc); lmc_reset (sc); LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0); LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg (sc, 0, 16), lmc_mii_readreg (sc, 0, 17)); } if(max_work-- <= 0) break; /* * Get current csr status to make sure * we've cleared all interrupts */ csr = LMC_CSR_READ (sc, csr_status); } /* end interrupt loop */ LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr); lmc_int_fail_out: spin_unlock(&sc->lmc_lock); lmc_trace(dev, "lmc_interrupt out"); return IRQ_RETVAL(handled); } static netdev_tx_t lmc_start_xmit(struct sk_buff *skb, struct net_device *dev) { lmc_softc_t *sc = dev_to_sc(dev); u32 flag; int entry; unsigned long flags; lmc_trace(dev, "lmc_start_xmit in"); spin_lock_irqsave(&sc->lmc_lock, flags); /* normal path, tbusy known to be zero */ entry = sc->lmc_next_tx % LMC_TXDESCS; sc->lmc_txq[entry] = skb; sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data); LMC_CONSOLE_LOG("xmit", skb->data, skb->len); #ifndef GCOM /* If the queue is less than half full, don't interrupt */ if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2) { /* Do not interrupt on completion of this packet */ flag = 0x60000000; netif_wake_queue(dev); } else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2) { /* This generates an interrupt on completion of this packet */ flag = 0xe0000000; netif_wake_queue(dev); } else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1) { /* Do not interrupt on completion of this packet */ flag = 0x60000000; netif_wake_queue(dev); } else { /* This generates an interrupt on completion of this packet */ flag = 0xe0000000; sc->lmc_txfull = 1; netif_stop_queue(dev); } #else flag = LMC_TDES_INTERRUPT_ON_COMPLETION; if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1) { /* ring full, go busy */ sc->lmc_txfull = 1; netif_stop_queue(dev); sc->extra_stats.tx_tbusy1++; LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0); } #endif if (entry == LMC_TXDESCS - 1) /* last descriptor in ring */ flag |= LMC_TDES_END_OF_RING; /* flag as such for Tulip */ /* don't pad small packets either */ flag = sc->lmc_txring[entry].length = (skb->len) | flag | sc->TxDescriptControlInit; /* set the transmit timeout flag to be checked in * the watchdog timer handler. -baz */ sc->extra_stats.tx_NoCompleteCnt++; sc->lmc_next_tx++; /* give ownership to the chip */ LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry); sc->lmc_txring[entry].status = 0x80000000; /* send now! */ LMC_CSR_WRITE (sc, csr_txpoll, 0); spin_unlock_irqrestore(&sc->lmc_lock, flags); lmc_trace(dev, "lmc_start_xmit_out"); return NETDEV_TX_OK; } static int lmc_rx(struct net_device *dev) { lmc_softc_t *sc = dev_to_sc(dev); int i; int rx_work_limit = LMC_RXDESCS; int rxIntLoopCnt; /* debug -baz */ int localLengthErrCnt = 0; long stat; struct sk_buff *skb, *nsb; u16 len; lmc_trace(dev, "lmc_rx in"); lmc_led_on(sc, LMC_DS3_LED3); rxIntLoopCnt = 0; /* debug -baz */ i = sc->lmc_next_rx % LMC_RXDESCS; while (((stat = sc->lmc_rxring[i].status) & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4) { rxIntLoopCnt++; /* debug -baz */ len = ((stat & LMC_RDES_FRAME_LENGTH) >> RDES_FRAME_LENGTH_BIT_NUMBER); if ((stat & 0x0300) != 0x0300) { /* Check first segment and last segment */ if ((stat & 0x0000ffff) != 0x7fff) { /* Oversized frame */ sc->lmc_device->stats.rx_length_errors++; goto skip_packet; } } if (stat & 0x00000008) { /* Catch a dribbling bit error */ sc->lmc_device->stats.rx_errors++; sc->lmc_device->stats.rx_frame_errors++; goto skip_packet; } if (stat & 0x00000004) { /* Catch a CRC error by the Xilinx */ sc->lmc_device->stats.rx_errors++; sc->lmc_device->stats.rx_crc_errors++; goto skip_packet; } if (len > LMC_PKT_BUF_SZ) { sc->lmc_device->stats.rx_length_errors++; localLengthErrCnt++; goto skip_packet; } if (len < sc->lmc_crcSize + 2) { sc->lmc_device->stats.rx_length_errors++; sc->extra_stats.rx_SmallPktCnt++; localLengthErrCnt++; goto skip_packet; } if(stat & 0x00004000){ printk(KERN_WARNING "%s: Receiver descriptor error, receiver out of sync?\n", dev->name); } len -= sc->lmc_crcSize; skb = sc->lmc_rxq[i]; /* * We ran out of memory at some point * just allocate an skb buff and continue. */ if (!skb) { nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2); if (nsb) { sc->lmc_rxq[i] = nsb; nsb->dev = dev; sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb)); } sc->failed_recv_alloc = 1; goto skip_packet; } sc->lmc_device->stats.rx_packets++; sc->lmc_device->stats.rx_bytes += len; LMC_CONSOLE_LOG("recv", skb->data, len); /* * I'm not sure of the sanity of this * Packets could be arriving at a constant * 44.210mbits/sec and we're going to copy * them into a new buffer?? */ if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */ /* * If it's a large packet don't copy it just hand it up */ give_it_anyways: sc->lmc_rxq[i] = NULL; sc->lmc_rxring[i].buffer1 = 0x0; skb_put (skb, len); skb->protocol = lmc_proto_type(sc, skb); skb_reset_mac_header(skb); /* skb_reset_network_header(skb); */ skb->dev = dev; lmc_proto_netif(sc, skb); /* * This skb will be destroyed by the upper layers, make a new one */ nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2); if (nsb) { sc->lmc_rxq[i] = nsb; nsb->dev = dev; sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb)); /* Transferred to 21140 below */ } else { /* * We've run out of memory, stop trying to allocate * memory and exit the interrupt handler * * The chip may run out of receivers and stop * in which care we'll try to allocate the buffer * again. (once a second) */ sc->extra_stats.rx_BuffAllocErr++; LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len); sc->failed_recv_alloc = 1; goto skip_out_of_mem; } } else { nsb = dev_alloc_skb(len); if(!nsb) { goto give_it_anyways; } skb_copy_from_linear_data(skb, skb_put(nsb, len), len); nsb->protocol = lmc_proto_type(sc, nsb); skb_reset_mac_header(nsb); /* skb_reset_network_header(nsb); */ nsb->dev = dev; lmc_proto_netif(sc, nsb); } skip_packet: LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len); sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4; sc->lmc_next_rx++; i = sc->lmc_next_rx % LMC_RXDESCS; rx_work_limit--; if (rx_work_limit < 0) break; } /* detect condition for LMC1000 where DSU cable attaches and fills * descriptors with bogus packets * if (localLengthErrCnt > LMC_RXDESCS - 3) { sc->extra_stats.rx_BadPktSurgeCnt++; LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt, sc->extra_stats.rx_BadPktSurgeCnt); } */ /* save max count of receive descriptors serviced */ if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt) sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */ #ifdef DEBUG if (rxIntLoopCnt == 0) { for (i = 0; i < LMC_RXDESCS; i++) { if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4) { rxIntLoopCnt++; } } LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0); } #endif lmc_led_off(sc, LMC_DS3_LED3); skip_out_of_mem: lmc_trace(dev, "lmc_rx out"); return 0; } static struct net_device_stats *lmc_get_stats(struct net_device *dev) { lmc_softc_t *sc = dev_to_sc(dev); unsigned long flags; lmc_trace(dev, "lmc_get_stats in"); spin_lock_irqsave(&sc->lmc_lock, flags); sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff; spin_unlock_irqrestore(&sc->lmc_lock, flags); lmc_trace(dev, "lmc_get_stats out"); return &sc->lmc_device->stats; } static struct pci_driver lmc_driver = { .name = "lmc", .id_table = lmc_pci_tbl, .probe = lmc_init_one, .remove = lmc_remove_one, }; module_pci_driver(lmc_driver); unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/ { int i; int command = (0xf6 << 10) | (devaddr << 5) | regno; int retval = 0; lmc_trace(sc->lmc_device, "lmc_mii_readreg in"); LMC_MII_SYNC (sc); lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync"); for (i = 15; i >= 0; i--) { int dataval = (command & (1 << i)) ? 0x20000 : 0; LMC_CSR_WRITE (sc, csr_9, dataval); lmc_delay (); /* __SLOW_DOWN_IO; */ LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000); lmc_delay (); /* __SLOW_DOWN_IO; */ } lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1"); for (i = 19; i > 0; i--) { LMC_CSR_WRITE (sc, csr_9, 0x40000); lmc_delay (); /* __SLOW_DOWN_IO; */ retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0); LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000); lmc_delay (); /* __SLOW_DOWN_IO; */ } lmc_trace(sc->lmc_device, "lmc_mii_readreg out"); return (retval >> 1) & 0xffff; } void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/ { int i = 32; int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data; lmc_trace(sc->lmc_device, "lmc_mii_writereg in"); LMC_MII_SYNC (sc); i = 31; while (i >= 0) { int datav; if (command & (1 << i)) datav = 0x20000; else datav = 0x00000; LMC_CSR_WRITE (sc, csr_9, datav); lmc_delay (); /* __SLOW_DOWN_IO; */ LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000)); lmc_delay (); /* __SLOW_DOWN_IO; */ i--; } i = 2; while (i > 0) { LMC_CSR_WRITE (sc, csr_9, 0x40000); lmc_delay (); /* __SLOW_DOWN_IO; */ LMC_CSR_WRITE (sc, csr_9, 0x50000); lmc_delay (); /* __SLOW_DOWN_IO; */ i--; } lmc_trace(sc->lmc_device, "lmc_mii_writereg out"); } static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/ { int i; lmc_trace(sc->lmc_device, "lmc_softreset in"); /* Initialize the receive rings and buffers. */ sc->lmc_txfull = 0; sc->lmc_next_rx = 0; sc->lmc_next_tx = 0; sc->lmc_taint_rx = 0; sc->lmc_taint_tx = 0; /* * Setup each one of the receiver buffers * allocate an skbuff for each one, setup the descriptor table * and point each buffer at the next one */ for (i = 0; i < LMC_RXDESCS; i++) { struct sk_buff *skb; if (sc->lmc_rxq[i] == NULL) { skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2); if(skb == NULL){ printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name); sc->failed_ring = 1; break; } else{ sc->lmc_rxq[i] = skb; } } else { skb = sc->lmc_rxq[i]; } skb->dev = sc->lmc_device; /* owned by 21140 */ sc->lmc_rxring[i].status = 0x80000000; /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */ sc->lmc_rxring[i].length = skb_tailroom(skb); /* use to be tail which is dumb since you're thinking why write * to the end of the packj,et but since there's nothing there tail == data */ sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data); /* This is fair since the structure is static and we have the next address */ sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]); } /* * Sets end of ring */ if (i != 0) { sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */ sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */ } LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */ /* Initialize the transmit rings and buffers */ for (i = 0; i < LMC_TXDESCS; i++) { if (sc->lmc_txq[i] != NULL){ /* have buffer */ dev_kfree_skb(sc->lmc_txq[i]); /* free it */ sc->lmc_device->stats.tx_dropped++; /* We just dropped a packet */ } sc->lmc_txq[i] = NULL; sc->lmc_txring[i].status = 0x00000000; sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]); } sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]); LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring)); lmc_trace(sc->lmc_device, "lmc_softreset out"); } void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/ { lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in"); sc->lmc_gpio_io &= ~bits; LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io)); lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out"); } void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/ { lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in"); sc->lmc_gpio_io |= bits; LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io)); lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out"); } void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/ { lmc_trace(sc->lmc_device, "lmc_led_on in"); if((~sc->lmc_miireg16) & led){ /* Already on! */ lmc_trace(sc->lmc_device, "lmc_led_on aon out"); return; } sc->lmc_miireg16 &= ~led; lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16); lmc_trace(sc->lmc_device, "lmc_led_on out"); } void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/ { lmc_trace(sc->lmc_device, "lmc_led_off in"); if(sc->lmc_miireg16 & led){ /* Already set don't do anything */ lmc_trace(sc->lmc_device, "lmc_led_off aoff out"); return; } sc->lmc_miireg16 |= led; lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16); lmc_trace(sc->lmc_device, "lmc_led_off out"); } static void lmc_reset(lmc_softc_t * const sc) /*fold00*/ { lmc_trace(sc->lmc_device, "lmc_reset in"); sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET; lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16); sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET; lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16); /* * make some of the GPIO pins be outputs */ lmc_gpio_mkoutput(sc, LMC_GEP_RESET); /* * RESET low to force state reset. This also forces * the transmitter clock to be internal, but we expect to reset * that later anyway. */ sc->lmc_gpio &= ~(LMC_GEP_RESET); LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio); /* * hold for more than 10 microseconds */ udelay(50); /* * stop driving Xilinx-related signals */ lmc_gpio_mkinput(sc, LMC_GEP_RESET); /* * Call media specific init routine */ sc->lmc_media->init(sc); sc->extra_stats.resetCount++; lmc_trace(sc->lmc_device, "lmc_reset out"); } static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/ { u32 val; lmc_trace(sc->lmc_device, "lmc_dec_reset in"); /* * disable all interrupts */ sc->lmc_intrmask = 0; LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask); /* * Reset the chip with a software reset command. * Wait 10 microseconds (actually 50 PCI cycles but at * 33MHz that comes to two microseconds but wait a * bit longer anyways) */ LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET); udelay(25); #ifdef __sparc__ sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode); sc->lmc_busmode = 0x00100000; sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET; LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode); #endif sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command); /* * We want: * no ethernet address in frames we write * disable padding (txdesc, padding disable) * ignore runt frames (rdes0 bit 15) * no receiver watchdog or transmitter jabber timer * (csr15 bit 0,14 == 1) * if using 16-bit CRC, turn off CRC (trans desc, crc disable) */ sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS | TULIP_CMD_FULLDUPLEX | TULIP_CMD_PASSBADPKT | TULIP_CMD_NOHEARTBEAT | TULIP_CMD_PORTSELECT | TULIP_CMD_RECEIVEALL | TULIP_CMD_MUSTBEONE ); sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE | TULIP_CMD_THRESHOLDCTL | TULIP_CMD_STOREFWD | TULIP_CMD_TXTHRSHLDCTL ); LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode); /* * disable receiver watchdog and transmit jabber */ val = LMC_CSR_READ(sc, csr_sia_general); val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE); LMC_CSR_WRITE(sc, csr_sia_general, val); lmc_trace(sc->lmc_device, "lmc_dec_reset out"); } static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/ size_t csr_size) { lmc_trace(sc->lmc_device, "lmc_initcsrs in"); sc->lmc_csrs.csr_busmode = csr_base + 0 * csr_size; sc->lmc_csrs.csr_txpoll = csr_base + 1 * csr_size; sc->lmc_csrs.csr_rxpoll = csr_base + 2 * csr_size; sc->lmc_csrs.csr_rxlist = csr_base + 3 * csr_size; sc->lmc_csrs.csr_txlist = csr_base + 4 * csr_size; sc->lmc_csrs.csr_status = csr_base + 5 * csr_size; sc->lmc_csrs.csr_command = csr_base + 6 * csr_size; sc->lmc_csrs.csr_intr = csr_base + 7 * csr_size; sc->lmc_csrs.csr_missed_frames = csr_base + 8 * csr_size; sc->lmc_csrs.csr_9 = csr_base + 9 * csr_size; sc->lmc_csrs.csr_10 = csr_base + 10 * csr_size; sc->lmc_csrs.csr_11 = csr_base + 11 * csr_size; sc->lmc_csrs.csr_12 = csr_base + 12 * csr_size; sc->lmc_csrs.csr_13 = csr_base + 13 * csr_size; sc->lmc_csrs.csr_14 = csr_base + 14 * csr_size; sc->lmc_csrs.csr_15 = csr_base + 15 * csr_size; lmc_trace(sc->lmc_device, "lmc_initcsrs out"); } static void lmc_driver_timeout(struct net_device *dev) { lmc_softc_t *sc = dev_to_sc(dev); u32 csr6; unsigned long flags; lmc_trace(dev, "lmc_driver_timeout in"); spin_lock_irqsave(&sc->lmc_lock, flags); printk("%s: Xmitter busy|\n", dev->name); sc->extra_stats.tx_tbusy_calls++; if (jiffies - dev_trans_start(dev) < TX_TIMEOUT) goto bug_out; /* * Chip seems to have locked up * Reset it * This whips out all our decriptor * table and starts from scartch */ LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO, LMC_CSR_READ (sc, csr_status), sc->extra_stats.tx_ProcTimeout); lmc_running_reset (dev); LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0); LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg (sc, 0, 16), lmc_mii_readreg (sc, 0, 17)); /* restart the tx processes */ csr6 = LMC_CSR_READ (sc, csr_command); LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002); LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002); /* immediate transmit */ LMC_CSR_WRITE (sc, csr_txpoll, 0); sc->lmc_device->stats.tx_errors++; sc->extra_stats.tx_ProcTimeout++; /* -baz */ netif_trans_update(dev); /* prevent tx timeout */ bug_out: spin_unlock_irqrestore(&sc->lmc_lock, flags); lmc_trace(dev, "lmc_driver_timeout out"); }
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