diff options
Diffstat (limited to 'drivers/net/8139cp.c')
| -rw-r--r-- | drivers/net/8139cp.c | 1904 |
1 files changed, 1904 insertions, 0 deletions
diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c new file mode 100644 index 000000000000..58c6a85c3aa2 --- /dev/null +++ b/drivers/net/8139cp.c @@ -0,0 +1,1904 @@ +/* 8139cp.c: A Linux PCI Ethernet driver for the RealTek 8139C+ chips. */ +/* + Copyright 2001-2004 Jeff Garzik <jgarzik@pobox.com> + + Copyright (C) 2001, 2002 David S. Miller (davem@redhat.com) [tg3.c] + Copyright (C) 2000, 2001 David S. Miller (davem@redhat.com) [sungem.c] + Copyright 2001 Manfred Spraul [natsemi.c] + Copyright 1999-2001 by Donald Becker. [natsemi.c] + Written 1997-2001 by Donald Becker. [8139too.c] + Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>. [acenic.c] + + 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. + + See the file COPYING in this distribution for more information. + + Contributors: + + Wake-on-LAN support - Felipe Damasio <felipewd@terra.com.br> + PCI suspend/resume - Felipe Damasio <felipewd@terra.com.br> + LinkChg interrupt - Felipe Damasio <felipewd@terra.com.br> + + TODO: + * Test Tx checksumming thoroughly + * Implement dev->tx_timeout + + Low priority TODO: + * Complete reset on PciErr + * Consider Rx interrupt mitigation using TimerIntr + * Investigate using skb->priority with h/w VLAN priority + * Investigate using High Priority Tx Queue with skb->priority + * Adjust Rx FIFO threshold and Max Rx DMA burst on Rx FIFO error + * Adjust Tx FIFO threshold and Max Tx DMA burst on Tx FIFO error + * Implement Tx software interrupt mitigation via + Tx descriptor bit + * The real minimum of CP_MIN_MTU is 4 bytes. However, + for this to be supported, one must(?) turn on packet padding. + * Support external MII transceivers (patch available) + + NOTES: + * TX checksumming is considered experimental. It is off by + default, use ethtool to turn it on. + + */ + +#define DRV_NAME "8139cp" +#define DRV_VERSION "1.2" +#define DRV_RELDATE "Mar 22, 2004" + + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/compiler.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/if_vlan.h> +#include <linux/crc32.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/tcp.h> +#include <linux/udp.h> +#include <linux/cache.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/uaccess.h> + +/* VLAN tagging feature enable/disable */ +#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) +#define CP_VLAN_TAG_USED 1 +#define CP_VLAN_TX_TAG(tx_desc,vlan_tag_value) \ + do { (tx_desc)->opts2 = (vlan_tag_value); } while (0) +#else +#define CP_VLAN_TAG_USED 0 +#define CP_VLAN_TX_TAG(tx_desc,vlan_tag_value) \ + do { (tx_desc)->opts2 = 0; } while (0) +#endif + +/* These identify the driver base version and may not be removed. */ +static char version[] = +KERN_INFO DRV_NAME ": 10/100 PCI Ethernet driver v" DRV_VERSION " (" DRV_RELDATE ")\n"; + +MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>"); +MODULE_DESCRIPTION("RealTek RTL-8139C+ series 10/100 PCI Ethernet driver"); +MODULE_LICENSE("GPL"); + +static int debug = -1; +MODULE_PARM (debug, "i"); +MODULE_PARM_DESC (debug, "8139cp: bitmapped message enable number"); + +/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast). + The RTL chips use a 64 element hash table based on the Ethernet CRC. */ +static int multicast_filter_limit = 32; +MODULE_PARM (multicast_filter_limit, "i"); +MODULE_PARM_DESC (multicast_filter_limit, "8139cp: maximum number of filtered multicast addresses"); + +#define PFX DRV_NAME ": " + +#ifndef TRUE +#define FALSE 0 +#define TRUE (!FALSE) +#endif + +#define CP_DEF_MSG_ENABLE (NETIF_MSG_DRV | \ + NETIF_MSG_PROBE | \ + NETIF_MSG_LINK) +#define CP_NUM_STATS 14 /* struct cp_dma_stats, plus one */ +#define CP_STATS_SIZE 64 /* size in bytes of DMA stats block */ +#define CP_REGS_SIZE (0xff + 1) +#define CP_REGS_VER 1 /* version 1 */ +#define CP_RX_RING_SIZE 64 +#define CP_TX_RING_SIZE 64 +#define CP_RING_BYTES \ + ((sizeof(struct cp_desc) * CP_RX_RING_SIZE) + \ + (sizeof(struct cp_desc) * CP_TX_RING_SIZE) + \ + CP_STATS_SIZE) +#define NEXT_TX(N) (((N) + 1) & (CP_TX_RING_SIZE - 1)) +#define NEXT_RX(N) (((N) + 1) & (CP_RX_RING_SIZE - 1)) +#define TX_BUFFS_AVAIL(CP) \ + (((CP)->tx_tail <= (CP)->tx_head) ? \ + (CP)->tx_tail + (CP_TX_RING_SIZE - 1) - (CP)->tx_head : \ + (CP)->tx_tail - (CP)->tx_head - 1) + +#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ +#define RX_OFFSET 2 +#define CP_INTERNAL_PHY 32 + +/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */ +#define RX_FIFO_THRESH 5 /* Rx buffer level before first PCI xfer. */ +#define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 */ +#define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */ +#define TX_EARLY_THRESH 256 /* Early Tx threshold, in bytes */ + +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (6*HZ) + +/* hardware minimum and maximum for a single frame's data payload */ +#define CP_MIN_MTU 60 /* TODO: allow lower, but pad */ +#define CP_MAX_MTU 4096 + +enum { + /* NIC register offsets */ + MAC0 = 0x00, /* Ethernet hardware address. */ + MAR0 = 0x08, /* Multicast filter. */ + StatsAddr = 0x10, /* 64-bit start addr of 64-byte DMA stats blk */ + TxRingAddr = 0x20, /* 64-bit start addr of Tx ring */ + HiTxRingAddr = 0x28, /* 64-bit start addr of high priority Tx ring */ + Cmd = 0x37, /* Command register */ + IntrMask = 0x3C, /* Interrupt mask */ + IntrStatus = 0x3E, /* Interrupt status */ + TxConfig = 0x40, /* Tx configuration */ + ChipVersion = 0x43, /* 8-bit chip version, inside TxConfig */ + RxConfig = 0x44, /* Rx configuration */ + RxMissed = 0x4C, /* 24 bits valid, write clears */ + Cfg9346 = 0x50, /* EEPROM select/control; Cfg reg [un]lock */ + Config1 = 0x52, /* Config1 */ + Config3 = 0x59, /* Config3 */ + Config4 = 0x5A, /* Config4 */ + MultiIntr = 0x5C, /* Multiple interrupt select */ + BasicModeCtrl = 0x62, /* MII BMCR */ + BasicModeStatus = 0x64, /* MII BMSR */ + NWayAdvert = 0x66, /* MII ADVERTISE */ + NWayLPAR = 0x68, /* MII LPA */ + NWayExpansion = 0x6A, /* MII Expansion */ + Config5 = 0xD8, /* Config5 */ + TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */ + RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */ + CpCmd = 0xE0, /* C+ Command register (C+ mode only) */ + IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */ + RxRingAddr = 0xE4, /* 64-bit start addr of Rx ring */ + TxThresh = 0xEC, /* Early Tx threshold */ + OldRxBufAddr = 0x30, /* DMA address of Rx ring buffer (C mode) */ + OldTSD0 = 0x10, /* DMA address of first Tx desc (C mode) */ + + /* Tx and Rx status descriptors */ + DescOwn = (1 << 31), /* Descriptor is owned by NIC */ + RingEnd = (1 << 30), /* End of descriptor ring */ + FirstFrag = (1 << 29), /* First segment of a packet */ + LastFrag = (1 << 28), /* Final segment of a packet */ + TxError = (1 << 23), /* Tx error summary */ + RxError = (1 << 20), /* Rx error summary */ + IPCS = (1 << 18), /* Calculate IP checksum */ + UDPCS = (1 << 17), /* Calculate UDP/IP checksum */ + TCPCS = (1 << 16), /* Calculate TCP/IP checksum */ + TxVlanTag = (1 << 17), /* Add VLAN tag */ + RxVlanTagged = (1 << 16), /* Rx VLAN tag available */ + IPFail = (1 << 15), /* IP checksum failed */ + UDPFail = (1 << 14), /* UDP/IP checksum failed */ + TCPFail = (1 << 13), /* TCP/IP checksum failed */ + NormalTxPoll = (1 << 6), /* One or more normal Tx packets to send */ + PID1 = (1 << 17), /* 2 protocol id bits: 0==non-IP, */ + PID0 = (1 << 16), /* 1==UDP/IP, 2==TCP/IP, 3==IP */ + RxProtoTCP = 1, + RxProtoUDP = 2, + RxProtoIP = 3, + TxFIFOUnder = (1 << 25), /* Tx FIFO underrun */ + TxOWC = (1 << 22), /* Tx Out-of-window collision */ + TxLinkFail = (1 << 21), /* Link failed during Tx of packet */ + TxMaxCol = (1 << 20), /* Tx aborted due to excessive collisions */ + TxColCntShift = 16, /* Shift, to get 4-bit Tx collision cnt */ + TxColCntMask = 0x01 | 0x02 | 0x04 | 0x08, /* 4-bit collision count */ + RxErrFrame = (1 << 27), /* Rx frame alignment error */ + RxMcast = (1 << 26), /* Rx multicast packet rcv'd */ + RxErrCRC = (1 << 18), /* Rx CRC error */ + RxErrRunt = (1 << 19), /* Rx error, packet < 64 bytes */ + RxErrLong = (1 << 21), /* Rx error, packet > 4096 bytes */ + RxErrFIFO = (1 << 22), /* Rx error, FIFO overflowed, pkt bad */ + + /* StatsAddr register */ + DumpStats = (1 << 3), /* Begin stats dump */ + + /* RxConfig register */ + RxCfgFIFOShift = 13, /* Shift, to get Rx FIFO thresh value */ + RxCfgDMAShift = 8, /* Shift, to get Rx Max DMA value */ + AcceptErr = 0x20, /* Accept packets with CRC errors */ + AcceptRunt = 0x10, /* Accept runt (<64 bytes) packets */ + AcceptBroadcast = 0x08, /* Accept broadcast packets */ + AcceptMulticast = 0x04, /* Accept multicast packets */ + AcceptMyPhys = 0x02, /* Accept pkts with our MAC as dest */ + AcceptAllPhys = 0x01, /* Accept all pkts w/ physical dest */ + + /* IntrMask / IntrStatus registers */ + PciErr = (1 << 15), /* System error on the PCI bus */ + TimerIntr = (1 << 14), /* Asserted when TCTR reaches TimerInt value */ + LenChg = (1 << 13), /* Cable length change */ + SWInt = (1 << 8), /* Software-requested interrupt */ + TxEmpty = (1 << 7), /* No Tx descriptors available */ + RxFIFOOvr = (1 << 6), /* Rx FIFO Overflow */ + LinkChg = (1 << 5), /* Packet underrun, or link change */ + RxEmpty = (1 << 4), /* No Rx descriptors available */ + TxErr = (1 << 3), /* Tx error */ + TxOK = (1 << 2), /* Tx packet sent */ + RxErr = (1 << 1), /* Rx error */ + RxOK = (1 << 0), /* Rx packet received */ + IntrResvd = (1 << 10), /* reserved, according to RealTek engineers, + but hardware likes to raise it */ + + IntrAll = PciErr | TimerIntr | LenChg | SWInt | TxEmpty | + RxFIFOOvr | LinkChg | RxEmpty | TxErr | TxOK | + RxErr | RxOK | IntrResvd, + + /* C mode command register */ + CmdReset = (1 << 4), /* Enable to reset; self-clearing */ + RxOn = (1 << 3), /* Rx mode enable */ + TxOn = (1 << 2), /* Tx mode enable */ + + /* C+ mode command register */ + RxVlanOn = (1 << 6), /* Rx VLAN de-tagging enable */ + RxChkSum = (1 << 5), /* Rx checksum offload enable */ + PCIDAC = (1 << 4), /* PCI Dual Address Cycle (64-bit PCI) */ + PCIMulRW = (1 << 3), /* Enable PCI read/write multiple */ + CpRxOn = (1 << 1), /* Rx mode enable */ + CpTxOn = (1 << 0), /* Tx mode enable */ + + /* Cfg9436 EEPROM control register */ + Cfg9346_Lock = 0x00, /* Lock ConfigX/MII register access */ + Cfg9346_Unlock = 0xC0, /* Unlock ConfigX/MII register access */ + + /* TxConfig register */ + IFG = (1 << 25) | (1 << 24), /* standard IEEE interframe gap */ + TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */ + + /* Early Tx Threshold register */ + TxThreshMask = 0x3f, /* Mask bits 5-0 */ + TxThreshMax = 2048, /* Max early Tx threshold */ + + /* Config1 register */ + DriverLoaded = (1 << 5), /* Software marker, driver is loaded */ + LWACT = (1 << 4), /* LWAKE active mode */ + PMEnable = (1 << 0), /* Enable various PM features of chip */ + + /* Config3 register */ + PARMEnable = (1 << 6), /* Enable auto-loading of PHY parms */ + MagicPacket = (1 << 5), /* Wake up when receives a Magic Packet */ + LinkUp = (1 << 4), /* Wake up when the cable connection is re-established */ + + /* Config4 register */ + LWPTN = (1 << 1), /* LWAKE Pattern */ + LWPME = (1 << 4), /* LANWAKE vs PMEB */ + + /* Config5 register */ + BWF = (1 << 6), /* Accept Broadcast wakeup frame */ + MWF = (1 << 5), /* Accept Multicast wakeup frame */ + UWF = (1 << 4), /* Accept Unicast wakeup frame */ + LANWake = (1 << 1), /* Enable LANWake signal */ + PMEStatus = (1 << 0), /* PME status can be reset by PCI RST# */ + + cp_norx_intr_mask = PciErr | LinkChg | TxOK | TxErr | TxEmpty, + cp_rx_intr_mask = RxOK | RxErr | RxEmpty | RxFIFOOvr, + cp_intr_mask = cp_rx_intr_mask | cp_norx_intr_mask, +}; + +static const unsigned int cp_rx_config = + (RX_FIFO_THRESH << RxCfgFIFOShift) | + (RX_DMA_BURST << RxCfgDMAShift); + +struct cp_desc { + u32 opts1; + u32 opts2; + u64 addr; +}; + +struct ring_info { + struct sk_buff *skb; + dma_addr_t mapping; + unsigned frag; +}; + +struct cp_dma_stats { + u64 tx_ok; + u64 rx_ok; + u64 tx_err; + u32 rx_err; + u16 rx_fifo; + u16 frame_align; + u32 tx_ok_1col; + u32 tx_ok_mcol; + u64 rx_ok_phys; + u64 rx_ok_bcast; + u32 rx_ok_mcast; + u16 tx_abort; + u16 tx_underrun; +} __attribute__((packed)); + +struct cp_extra_stats { + unsigned long rx_frags; +}; + +struct cp_private { + void __iomem *regs; + struct net_device *dev; + spinlock_t lock; + u32 msg_enable; + + struct pci_dev *pdev; + u32 rx_config; + u16 cpcmd; + + struct net_device_stats net_stats; + struct cp_extra_stats cp_stats; + struct cp_dma_stats *nic_stats; + dma_addr_t nic_stats_dma; + + unsigned rx_tail ____cacheline_aligned; + struct cp_desc *rx_ring; + struct ring_info rx_skb[CP_RX_RING_SIZE]; + unsigned rx_buf_sz; + + unsigned tx_head ____cacheline_aligned; + unsigned tx_tail; + + struct cp_desc *tx_ring; + struct ring_info tx_skb[CP_TX_RING_SIZE]; + dma_addr_t ring_dma; + +#if CP_VLAN_TAG_USED + struct vlan_group *vlgrp; +#endif + + unsigned int wol_enabled : 1; /* Is Wake-on-LAN enabled? */ + + struct mii_if_info mii_if; +}; + +#define cpr8(reg) readb(cp->regs + (reg)) +#define cpr16(reg) readw(cp->regs + (reg)) +#define cpr32(reg) readl(cp->regs + (reg)) +#define cpw8(reg,val) writeb((val), cp->regs + (reg)) +#define cpw16(reg,val) writew((val), cp->regs + (reg)) +#define cpw32(reg,val) writel((val), cp->regs + (reg)) +#define cpw8_f(reg,val) do { \ + writeb((val), cp->regs + (reg)); \ + readb(cp->regs + (reg)); \ + } while (0) +#define cpw16_f(reg,val) do { \ + writew((val), cp->regs + (reg)); \ + readw(cp->regs + (reg)); \ + } while (0) +#define cpw32_f(reg,val) do { \ + writel((val), cp->regs + (reg)); \ + readl(cp->regs + (reg)); \ + } while (0) + + +static void __cp_set_rx_mode (struct net_device *dev); +static void cp_tx (struct cp_private *cp); +static void cp_clean_rings (struct cp_private *cp); + +static struct pci_device_id cp_pci_tbl[] = { + { PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, + { PCI_VENDOR_ID_TTTECH, PCI_DEVICE_ID_TTTECH_MC322, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, + { }, +}; +MODULE_DEVICE_TABLE(pci, cp_pci_tbl); + +static struct { + const char str[ETH_GSTRING_LEN]; +} ethtool_stats_keys[] = { + { "tx_ok" }, + { "rx_ok" }, + { "tx_err" }, + { "rx_err" }, + { "rx_fifo" }, + { "frame_align" }, + { "tx_ok_1col" }, + { "tx_ok_mcol" }, + { "rx_ok_phys" }, + { "rx_ok_bcast" }, + { "rx_ok_mcast" }, + { "tx_abort" }, + { "tx_underrun" }, + { "rx_frags" }, +}; + + +#if CP_VLAN_TAG_USED +static void cp_vlan_rx_register(struct net_device *dev, struct vlan_group *grp) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&cp->lock, flags); + cp->vlgrp = grp; + cp->cpcmd |= RxVlanOn; + cpw16(CpCmd, cp->cpcmd); + spin_unlock_irqrestore(&cp->lock, flags); +} + +static void cp_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&cp->lock, flags); + cp->cpcmd &= ~RxVlanOn; + cpw16(CpCmd, cp->cpcmd); + if (cp->vlgrp) + cp->vlgrp->vlan_devices[vid] = NULL; + spin_unlock_irqrestore(&cp->lock, flags); +} +#endif /* CP_VLAN_TAG_USED */ + +static inline void cp_set_rxbufsize (struct cp_private *cp) +{ + unsigned int mtu = cp->dev->mtu; + + if (mtu > ETH_DATA_LEN) + /* MTU + ethernet header + FCS + optional VLAN tag */ + cp->rx_buf_sz = mtu + ETH_HLEN + 8; + else + cp->rx_buf_sz = PKT_BUF_SZ; +} + +static inline void cp_rx_skb (struct cp_private *cp, struct sk_buff *skb, + struct cp_desc *desc) +{ + skb->protocol = eth_type_trans (skb, cp->dev); + + cp->net_stats.rx_packets++; + cp->net_stats.rx_bytes += skb->len; + cp->dev->last_rx = jiffies; + +#if CP_VLAN_TAG_USED + if (cp->vlgrp && (desc->opts2 & RxVlanTagged)) { + vlan_hwaccel_receive_skb(skb, cp->vlgrp, + be16_to_cpu(desc->opts2 & 0xffff)); + } else +#endif + netif_receive_skb(skb); +} + +static void cp_rx_err_acct (struct cp_private *cp, unsigned rx_tail, + u32 status, u32 len) +{ + if (netif_msg_rx_err (cp)) + printk (KERN_DEBUG + "%s: rx err, slot %d status 0x%x len %d\n", + cp->dev->name, rx_tail, status, len); + cp->net_stats.rx_errors++; + if (status & RxErrFrame) + cp->net_stats.rx_frame_errors++; + if (status & RxErrCRC) + cp->net_stats.rx_crc_errors++; + if ((status & RxErrRunt) || (status & RxErrLong)) + cp->net_stats.rx_length_errors++; + if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag)) + cp->net_stats.rx_length_errors++; + if (status & RxErrFIFO) + cp->net_stats.rx_fifo_errors++; +} + +static inline unsigned int cp_rx_csum_ok (u32 status) +{ + unsigned int protocol = (status >> 16) & 0x3; + + if (likely((protocol == RxProtoTCP) && (!(status & TCPFail)))) + return 1; + else if ((protocol == RxProtoUDP) && (!(status & UDPFail))) + return 1; + else if ((protocol == RxProtoIP) && (!(status & IPFail))) + return 1; + return 0; +} + +static int cp_rx_poll (struct net_device *dev, int *budget) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned rx_tail = cp->rx_tail; + unsigned rx_work = dev->quota; + unsigned rx; + +rx_status_loop: + rx = 0; + cpw16(IntrStatus, cp_rx_intr_mask); + + while (1) { + u32 status, len; + dma_addr_t mapping; + struct sk_buff *skb, *new_skb; + struct cp_desc *desc; + unsigned buflen; + + skb = cp->rx_skb[rx_tail].skb; + if (!skb) + BUG(); + + desc = &cp->rx_ring[rx_tail]; + status = le32_to_cpu(desc->opts1); + if (status & DescOwn) + break; + + len = (status & 0x1fff) - 4; + mapping = cp->rx_skb[rx_tail].mapping; + + if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag)) { + /* we don't support incoming fragmented frames. + * instead, we attempt to ensure that the + * pre-allocated RX skbs are properly sized such + * that RX fragments are never encountered + */ + cp_rx_err_acct(cp, rx_tail, status, len); + cp->net_stats.rx_dropped++; + cp->cp_stats.rx_frags++; + goto rx_next; + } + + if (status & (RxError | RxErrFIFO)) { + cp_rx_err_acct(cp, rx_tail, status, len); + goto rx_next; + } + + if (netif_msg_rx_status(cp)) + printk(KERN_DEBUG "%s: rx slot %d status 0x%x len %d\n", + cp->dev->name, rx_tail, status, len); + + buflen = cp->rx_buf_sz + RX_OFFSET; + new_skb = dev_alloc_skb (buflen); + if (!new_skb) { + cp->net_stats.rx_dropped++; + goto rx_next; + } + + skb_reserve(new_skb, RX_OFFSET); + new_skb->dev = cp->dev; + + pci_unmap_single(cp->pdev, mapping, + buflen, PCI_DMA_FROMDEVICE); + + /* Handle checksum offloading for incoming packets. */ + if (cp_rx_csum_ok(status)) + skb->ip_summed = CHECKSUM_UNNECESSARY; + else + skb->ip_summed = CHECKSUM_NONE; + + skb_put(skb, len); + + mapping = + cp->rx_skb[rx_tail].mapping = + pci_map_single(cp->pdev, new_skb->tail, + buflen, PCI_DMA_FROMDEVICE); + cp->rx_skb[rx_tail].skb = new_skb; + + cp_rx_skb(cp, skb, desc); + rx++; + +rx_next: + cp->rx_ring[rx_tail].opts2 = 0; + cp->rx_ring[rx_tail].addr = cpu_to_le64(mapping); + if (rx_tail == (CP_RX_RING_SIZE - 1)) + desc->opts1 = cpu_to_le32(DescOwn | RingEnd | + cp->rx_buf_sz); + else + desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz); + rx_tail = NEXT_RX(rx_tail); + + if (!rx_work--) + break; + } + + cp->rx_tail = rx_tail; + + dev->quota -= rx; + *budget -= rx; + + /* if we did not reach work limit, then we're done with + * this round of polling + */ + if (rx_work) { + if (cpr16(IntrStatus) & cp_rx_intr_mask) + goto rx_status_loop; + + local_irq_disable(); + cpw16_f(IntrMask, cp_intr_mask); + __netif_rx_complete(dev); + local_irq_enable(); + + return 0; /* done */ + } + + return 1; /* not done */ +} + +static irqreturn_t +cp_interrupt (int irq, void *dev_instance, struct pt_regs *regs) +{ + struct net_device *dev = dev_instance; + struct cp_private *cp; + u16 status; + + if (unlikely(dev == NULL)) + return IRQ_NONE; + cp = netdev_priv(dev); + + status = cpr16(IntrStatus); + if (!status || (status == 0xFFFF)) + return IRQ_NONE; + + if (netif_msg_intr(cp)) + printk(KERN_DEBUG "%s: intr, status %04x cmd %02x cpcmd %04x\n", + dev->name, status, cpr8(Cmd), cpr16(CpCmd)); + + cpw16(IntrStatus, status & ~cp_rx_intr_mask); + + spin_lock(&cp->lock); + + /* close possible race's with dev_close */ + if (unlikely(!netif_running(dev))) { + cpw16(IntrMask, 0); + spin_unlock(&cp->lock); + return IRQ_HANDLED; + } + + if (status & (RxOK | RxErr | RxEmpty | RxFIFOOvr)) + if (netif_rx_schedule_prep(dev)) { + cpw16_f(IntrMask, cp_norx_intr_mask); + __netif_rx_schedule(dev); + } + + if (status & (TxOK | TxErr | TxEmpty | SWInt)) + cp_tx(cp); + if (status & LinkChg) + mii_check_media(&cp->mii_if, netif_msg_link(cp), FALSE); + + spin_unlock(&cp->lock); + + if (status & PciErr) { + u16 pci_status; + + pci_read_config_word(cp->pdev, PCI_STATUS, &pci_status); + pci_write_config_word(cp->pdev, PCI_STATUS, pci_status); + printk(KERN_ERR "%s: PCI bus error, status=%04x, PCI status=%04x\n", + dev->name, status, pci_status); + + /* TODO: reset hardware */ + } + + return IRQ_HANDLED; +} + +static void cp_tx (struct cp_private *cp) +{ + unsigned tx_head = cp->tx_head; + unsigned tx_tail = cp->tx_tail; + + while (tx_tail != tx_head) { + struct sk_buff *skb; + u32 status; + + rmb(); + status = le32_to_cpu(cp->tx_ring[tx_tail].opts1); + if (status & DescOwn) + break; + + skb = cp->tx_skb[tx_tail].skb; + if (!skb) + BUG(); + + pci_unmap_single(cp->pdev, cp->tx_skb[tx_tail].mapping, + skb->len, PCI_DMA_TODEVICE); + + if (status & LastFrag) { + if (status & (TxError | TxFIFOUnder)) { + if (netif_msg_tx_err(cp)) + printk(KERN_DEBUG "%s: tx err, status 0x%x\n", + cp->dev->name, status); + cp->net_stats.tx_errors++; + if (status & TxOWC) + cp->net_stats.tx_window_errors++; + if (status & TxMaxCol) + cp->net_stats.tx_aborted_errors++; + if (status & TxLinkFail) + cp->net_stats.tx_carrier_errors++; + if (status & TxFIFOUnder) + cp->net_stats.tx_fifo_errors++; + } else { + cp->net_stats.collisions += + ((status >> TxColCntShift) & TxColCntMask); + cp->net_stats.tx_packets++; + cp->net_stats.tx_bytes += skb->len; + if (netif_msg_tx_done(cp)) + printk(KERN_DEBUG "%s: tx done, slot %d\n", cp->dev->name, tx_tail); + } + dev_kfree_skb_irq(skb); + } + + cp->tx_skb[tx_tail].skb = NULL; + + tx_tail = NEXT_TX(tx_tail); + } + + cp->tx_tail = tx_tail; + + if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1)) + netif_wake_queue(cp->dev); +} + +static int cp_start_xmit (struct sk_buff *skb, struct net_device *dev) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned entry; + u32 eor; +#if CP_VLAN_TAG_USED + u32 vlan_tag = 0; +#endif + + spin_lock_irq(&cp->lock); + + /* This is a hard error, log it. */ + if (TX_BUFFS_AVAIL(cp) <= (skb_shinfo(skb)->nr_frags + 1)) { + netif_stop_queue(dev); + spin_unlock_irq(&cp->lock); + printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n", + dev->name); + return 1; + } + +#if CP_VLAN_TAG_USED + if (cp->vlgrp && vlan_tx_tag_present(skb)) + vlan_tag = TxVlanTag | cpu_to_be16(vlan_tx_tag_get(skb)); +#endif + + entry = cp->tx_head; + eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0; + if (skb_shinfo(skb)->nr_frags == 0) { + struct cp_desc *txd = &cp->tx_ring[entry]; + u32 len; + dma_addr_t mapping; + + len = skb->len; + mapping = pci_map_single(cp->pdev, skb->data, len, PCI_DMA_TODEVICE); + CP_VLAN_TX_TAG(txd, vlan_tag); + txd->addr = cpu_to_le64(mapping); + wmb(); + + if (skb->ip_summed == CHECKSUM_HW) { + const struct iphdr *ip = skb->nh.iph; + if (ip->protocol == IPPROTO_TCP) + txd->opts1 = cpu_to_le32(eor | len | DescOwn | + FirstFrag | LastFrag | + IPCS | TCPCS); + else if (ip->protocol == IPPROTO_UDP) + txd->opts1 = cpu_to_le32(eor | len | DescOwn | + FirstFrag | LastFrag | + IPCS | UDPCS); + else + BUG(); + } else + txd->opts1 = cpu_to_le32(eor | len | DescOwn | + FirstFrag | LastFrag); + wmb(); + + cp->tx_skb[entry].skb = skb; + cp->tx_skb[entry].mapping = mapping; + cp->tx_skb[entry].frag = 0; + entry = NEXT_TX(entry); + } else { + struct cp_desc *txd; + u32 first_len, first_eor; + dma_addr_t first_mapping; + int frag, first_entry = entry; + const struct iphdr *ip = skb->nh.iph; + + /* We must give this initial chunk to the device last. + * Otherwise we could race with the device. + */ + first_eor = eor; + first_len = skb_headlen(skb); + first_mapping = pci_map_single(cp->pdev, skb->data, + first_len, PCI_DMA_TODEVICE); + cp->tx_skb[entry].skb = skb; + cp->tx_skb[entry].mapping = first_mapping; + cp->tx_skb[entry].frag = 1; + entry = NEXT_TX(entry); + + for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { + skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag]; + u32 len; + u32 ctrl; + dma_addr_t mapping; + + len = this_frag->size; + mapping = pci_map_single(cp->pdev, + ((void *) page_address(this_frag->page) + + this_frag->page_offset), + len, PCI_DMA_TODEVICE); + eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0; + + if (skb->ip_summed == CHECKSUM_HW) { + ctrl = eor | len | DescOwn | IPCS; + if (ip->protocol == IPPROTO_TCP) + ctrl |= TCPCS; + else if (ip->protocol == IPPROTO_UDP) + ctrl |= UDPCS; + else + BUG(); + } else + ctrl = eor | len | DescOwn; + + if (frag == skb_shinfo(skb)->nr_frags - 1) + ctrl |= LastFrag; + + txd = &cp->tx_ring[entry]; + CP_VLAN_TX_TAG(txd, vlan_tag); + txd->addr = cpu_to_le64(mapping); + wmb(); + + txd->opts1 = cpu_to_le32(ctrl); + wmb(); + + cp->tx_skb[entry].skb = skb; + cp->tx_skb[entry].mapping = mapping; + cp->tx_skb[entry].frag = frag + 2; + entry = NEXT_TX(entry); + } + + txd = &cp->tx_ring[first_entry]; + CP_VLAN_TX_TAG(txd, vlan_tag); + txd->addr = cpu_to_le64(first_mapping); + wmb(); + + if (skb->ip_summed == CHECKSUM_HW) { + if (ip->protocol == IPPROTO_TCP) + txd->opts1 = cpu_to_le32(first_eor | first_len | + FirstFrag | DescOwn | + IPCS | TCPCS); + else if (ip->protocol == IPPROTO_UDP) + txd->opts1 = cpu_to_le32(first_eor | first_len | + FirstFrag | DescOwn | + IPCS | UDPCS); + else + BUG(); + } else + txd->opts1 = cpu_to_le32(first_eor | first_len | + FirstFrag | DescOwn); + wmb(); + } + cp->tx_head = entry; + if (netif_msg_tx_queued(cp)) + printk(KERN_DEBUG "%s: tx queued, slot %d, skblen %d\n", + dev->name, entry, skb->len); + if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1)) + netif_stop_queue(dev); + + spin_unlock_irq(&cp->lock); + + cpw8(TxPoll, NormalTxPoll); + dev->trans_start = jiffies; + + return 0; +} + +/* Set or clear the multicast filter for this adaptor. + This routine is not state sensitive and need not be SMP locked. */ + +static void __cp_set_rx_mode (struct net_device *dev) +{ + struct cp_private *cp = netdev_priv(dev); + u32 mc_filter[2]; /* Multicast hash filter */ + int i, rx_mode; + u32 tmp; + + /* Note: do not reorder, GCC is clever about common statements. */ + if (dev->flags & IFF_PROMISC) { + /* Unconditionally log net taps. */ + printk (KERN_NOTICE "%s: Promiscuous mode enabled.\n", + dev->name); + rx_mode = + AcceptBroadcast | AcceptMulticast | AcceptMyPhys | + AcceptAllPhys; + mc_filter[1] = mc_filter[0] = 0xffffffff; + } else if ((dev->mc_count > multicast_filter_limit) + || (dev->flags & IFF_ALLMULTI)) { + /* Too many to filter perfectly -- accept all multicasts. */ + rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys; + mc_filter[1] = mc_filter[0] = 0xffffffff; + } else { + struct dev_mc_list *mclist; + rx_mode = AcceptBroadcast | AcceptMyPhys; + mc_filter[1] = mc_filter[0] = 0; + for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; + i++, mclist = mclist->next) { + int bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26; + + mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); + rx_mode |= AcceptMulticast; + } + } + + /* We can safely update without stopping the chip. */ + tmp = cp_rx_config | rx_mode; + if (cp->rx_config != tmp) { + cpw32_f (RxConfig, tmp); + cp->rx_config = tmp; + } + cpw32_f (MAR0 + 0, mc_filter[0]); + cpw32_f (MAR0 + 4, mc_filter[1]); +} + +static void cp_set_rx_mode (struct net_device *dev) +{ + unsigned long flags; + struct cp_private *cp = netdev_priv(dev); + + spin_lock_irqsave (&cp->lock, flags); + __cp_set_rx_mode(dev); + spin_unlock_irqrestore (&cp->lock, flags); +} + +static void __cp_get_stats(struct cp_private *cp) +{ + /* only lower 24 bits valid; write any value to clear */ + cp->net_stats.rx_missed_errors += (cpr32 (RxMissed) & 0xffffff); + cpw32 (RxMissed, 0); +} + +static struct net_device_stats *cp_get_stats(struct net_device *dev) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned long flags; + + /* The chip only need report frame silently dropped. */ + spin_lock_irqsave(&cp->lock, flags); + if (netif_running(dev) && netif_device_present(dev)) + __cp_get_stats(cp); + spin_unlock_irqrestore(&cp->lock, flags); + + return &cp->net_stats; +} + +static void cp_stop_hw (struct cp_private *cp) +{ + cpw16(IntrStatus, ~(cpr16(IntrStatus))); + cpw16_f(IntrMask, 0); + cpw8(Cmd, 0); + cpw16_f(CpCmd, 0); + cpw16_f(IntrStatus, ~(cpr16(IntrStatus))); + + cp->rx_tail = 0; + cp->tx_head = cp->tx_tail = 0; +} + +static void cp_reset_hw (struct cp_private *cp) +{ + unsigned work = 1000; + + cpw8(Cmd, CmdReset); + + while (work--) { + if (!(cpr8(Cmd) & CmdReset)) + return; + + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(10); + } + + printk(KERN_ERR "%s: hardware reset timeout\n", cp->dev->name); +} + +static inline void cp_start_hw (struct cp_private *cp) +{ + cpw16(CpCmd, cp->cpcmd); + cpw8(Cmd, RxOn | TxOn); +} + +static void cp_init_hw (struct cp_private *cp) +{ + struct net_device *dev = cp->dev; + dma_addr_t ring_dma; + + cp_reset_hw(cp); + + cpw8_f (Cfg9346, Cfg9346_Unlock); + + /* Restore our idea of the MAC address. */ + cpw32_f (MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0))); + cpw32_f (MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4))); + + cp_start_hw(cp); + cpw8(TxThresh, 0x06); /* XXX convert magic num to a constant */ + + __cp_set_rx_mode(dev); + cpw32_f (TxConfig, IFG | (TX_DMA_BURST << TxDMAShift)); + + cpw8(Config1, cpr8(Config1) | DriverLoaded | PMEnable); + /* Disable Wake-on-LAN. Can be turned on with ETHTOOL_SWOL */ + cpw8(Config3, PARMEnable); + cp->wol_enabled = 0; + + cpw8(Config5, cpr8(Config5) & PMEStatus); + + cpw32_f(HiTxRingAddr, 0); + cpw32_f(HiTxRingAddr + 4, 0); + + ring_dma = cp->ring_dma; + cpw32_f(RxRingAddr, ring_dma & 0xffffffff); + cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16); + + ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE; + cpw32_f(TxRingAddr, ring_dma & 0xffffffff); + cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16); + + cpw16(MultiIntr, 0); + + cpw16_f(IntrMask, cp_intr_mask); + + cpw8_f(Cfg9346, Cfg9346_Lock); +} + +static int cp_refill_rx (struct cp_private *cp) +{ + unsigned i; + + for (i = 0; i < CP_RX_RING_SIZE; i++) { + struct sk_buff *skb; + + skb = dev_alloc_skb(cp->rx_buf_sz + RX_OFFSET); + if (!skb) + goto err_out; + + skb->dev = cp->dev; + skb_reserve(skb, RX_OFFSET); + + cp->rx_skb[i].mapping = pci_map_single(cp->pdev, + skb->tail, cp->rx_buf_sz, PCI_DMA_FROMDEVICE); + cp->rx_skb[i].skb = skb; + cp->rx_skb[i].frag = 0; + + cp->rx_ring[i].opts2 = 0; + cp->rx_ring[i].addr = cpu_to_le64(cp->rx_skb[i].mapping); + if (i == (CP_RX_RING_SIZE - 1)) + cp->rx_ring[i].opts1 = + cpu_to_le32(DescOwn | RingEnd | cp->rx_buf_sz); + else + cp->rx_ring[i].opts1 = + cpu_to_le32(DescOwn | cp->rx_buf_sz); + } + + return 0; + +err_out: + cp_clean_rings(cp); + return -ENOMEM; +} + +static int cp_init_rings (struct cp_private *cp) +{ + memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE); + cp->tx_ring[CP_TX_RING_SIZE - 1].opts1 = cpu_to_le32(RingEnd); + + cp->rx_tail = 0; + cp->tx_head = cp->tx_tail = 0; + + return cp_refill_rx (cp); +} + +static int cp_alloc_rings (struct cp_private *cp) +{ + void *mem; + + mem = pci_alloc_consistent(cp->pdev, CP_RING_BYTES, &cp->ring_dma); + if (!mem) + return -ENOMEM; + + cp->rx_ring = mem; + cp->tx_ring = &cp->rx_ring[CP_RX_RING_SIZE]; + + mem += (CP_RING_BYTES - CP_STATS_SIZE); + cp->nic_stats = mem; + cp->nic_stats_dma = cp->ring_dma + (CP_RING_BYTES - CP_STATS_SIZE); + + return cp_init_rings(cp); +} + +static void cp_clean_rings (struct cp_private *cp) +{ + unsigned i; + + memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE); + memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE); + + for (i = 0; i < CP_RX_RING_SIZE; i++) { + if (cp->rx_skb[i].skb) { + pci_unmap_single(cp->pdev, cp->rx_skb[i].mapping, + cp->rx_buf_sz, PCI_DMA_FROMDEVICE); + dev_kfree_skb(cp->rx_skb[i].skb); + } + } + + for (i = 0; i < CP_TX_RING_SIZE; i++) { + if (cp->tx_skb[i].skb) { + struct sk_buff *skb = cp->tx_skb[i].skb; + pci_unmap_single(cp->pdev, cp->tx_skb[i].mapping, + skb->len, PCI_DMA_TODEVICE); + dev_kfree_skb(skb); + cp->net_stats.tx_dropped++; + } + } + + memset(&cp->rx_skb, 0, sizeof(struct ring_info) * CP_RX_RING_SIZE); + memset(&cp->tx_skb, 0, sizeof(struct ring_info) * CP_TX_RING_SIZE); +} + +static void cp_free_rings (struct cp_private *cp) +{ + cp_clean_rings(cp); + pci_free_consistent(cp->pdev, CP_RING_BYTES, cp->rx_ring, cp->ring_dma); + cp->rx_ring = NULL; + cp->tx_ring = NULL; + cp->nic_stats = NULL; +} + +static int cp_open (struct net_device *dev) +{ + struct cp_private *cp = netdev_priv(dev); + int rc; + + if (netif_msg_ifup(cp)) + printk(KERN_DEBUG "%s: enabling interface\n", dev->name); + + rc = cp_alloc_rings(cp); + if (rc) + return rc; + + cp_init_hw(cp); + + rc = request_irq(dev->irq, cp_interrupt, SA_SHIRQ, dev->name, dev); + if (rc) + goto err_out_hw; + + netif_carrier_off(dev); + mii_check_media(&cp->mii_if, netif_msg_link(cp), TRUE); + netif_start_queue(dev); + + return 0; + +err_out_hw: + cp_stop_hw(cp); + cp_free_rings(cp); + return rc; +} + +static int cp_close (struct net_device *dev) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned long flags; + + if (netif_msg_ifdown(cp)) + printk(KERN_DEBUG "%s: disabling interface\n", dev->name); + + spin_lock_irqsave(&cp->lock, flags); + + netif_stop_queue(dev); + netif_carrier_off(dev); + + cp_stop_hw(cp); + + spin_unlock_irqrestore(&cp->lock, flags); + + synchronize_irq(dev->irq); + free_irq(dev->irq, dev); + + cp_free_rings(cp); + return 0; +} + +#ifdef BROKEN +static int cp_change_mtu(struct net_device *dev, int new_mtu) +{ + struct cp_private *cp = netdev_priv(dev); + int rc; + unsigned long flags; + + /* check for invalid MTU, according to hardware limits */ + if (new_mtu < CP_MIN_MTU || new_mtu > CP_MAX_MTU) + return -EINVAL; + + /* if network interface not up, no need for complexity */ + if (!netif_running(dev)) { + dev->mtu = new_mtu; + cp_set_rxbufsize(cp); /* set new rx buf size */ + return 0; + } + + spin_lock_irqsave(&cp->lock, flags); + + cp_stop_hw(cp); /* stop h/w and free rings */ + cp_clean_rings(cp); + + dev->mtu = new_mtu; + cp_set_rxbufsize(cp); /* set new rx buf size */ + + rc = cp_init_rings(cp); /* realloc and restart h/w */ + cp_start_hw(cp); + + spin_unlock_irqrestore(&cp->lock, flags); + + return rc; +} +#endif /* BROKEN */ + +static char mii_2_8139_map[8] = { + BasicModeCtrl, + BasicModeStatus, + 0, + 0, + NWayAdvert, + NWayLPAR, + NWayExpansion, + 0 +}; + +static int mdio_read(struct net_device *dev, int phy_id, int location) +{ + struct cp_private *cp = netdev_priv(dev); + + return location < 8 && mii_2_8139_map[location] ? + readw(cp->regs + mii_2_8139_map[location]) : 0; +} + + +static void mdio_write(struct net_device *dev, int phy_id, int location, + int value) +{ + struct cp_private *cp = netdev_priv(dev); + + if (location == 0) { + cpw8(Cfg9346, Cfg9346_Unlock); + cpw16(BasicModeCtrl, value); + cpw8(Cfg9346, Cfg9346_Lock); + } else if (location < 8 && mii_2_8139_map[location]) + cpw16(mii_2_8139_map[location], value); +} + +/* Set the ethtool Wake-on-LAN settings */ +static int netdev_set_wol (struct cp_private *cp, + const struct ethtool_wolinfo *wol) +{ + u8 options; + + options = cpr8 (Config3) & ~(LinkUp | MagicPacket); + /* If WOL is being disabled, no need for complexity */ + if (wol->wolopts) { + if (wol->wolopts & WAKE_PHY) options |= LinkUp; + if (wol->wolopts & WAKE_MAGIC) options |= MagicPacket; + } + + cpw8 (Cfg9346, Cfg9346_Unlock); + cpw8 (Config3, options); + cpw8 (Cfg9346, Cfg9346_Lock); + + options = 0; /* Paranoia setting */ + options = cpr8 (Config5) & ~(UWF | MWF | BWF); + /* If WOL is being disabled, no need for complexity */ + if (wol->wolopts) { + if (wol->wolopts & WAKE_UCAST) options |= UWF; + if (wol->wolopts & WAKE_BCAST) options |= BWF; + if (wol->wolopts & WAKE_MCAST) options |= MWF; + } + + cpw8 (Config5, options); + + cp->wol_enabled = (wol->wolopts) ? 1 : 0; + + return 0; +} + +/* Get the ethtool Wake-on-LAN settings */ +static void netdev_get_wol (struct cp_private *cp, + struct ethtool_wolinfo *wol) +{ + u8 options; + + wol->wolopts = 0; /* Start from scratch */ + wol->supported = WAKE_PHY | WAKE_BCAST | WAKE_MAGIC | + WAKE_MCAST | WAKE_UCAST; + /* We don't need to go on if WOL is disabled */ + if (!cp->wol_enabled) return; + + options = cpr8 (Config3); + if (options & LinkUp) wol->wolopts |= WAKE_PHY; + if (options & MagicPacket) wol->wolopts |= WAKE_MAGIC; + + options = 0; /* Paranoia setting */ + options = cpr8 (Config5); + if (options & UWF) wol->wolopts |= WAKE_UCAST; + if (options & BWF) wol->wolopts |= WAKE_BCAST; + if (options & MWF) wol->wolopts |= WAKE_MCAST; +} + +static void cp_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct cp_private *cp = netdev_priv(dev); + + strcpy (info->driver, DRV_NAME); + strcpy (info->version, DRV_VERSION); + strcpy (info->bus_info, pci_name(cp->pdev)); +} + +static int cp_get_regs_len(struct net_device *dev) +{ + return CP_REGS_SIZE; +} + +static int cp_get_stats_count (struct net_device *dev) +{ + return CP_NUM_STATS; +} + +static int cp_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct cp_private *cp = netdev_priv(dev); + int rc; + unsigned long flags; + + spin_lock_irqsave(&cp->lock, flags); + rc = mii_ethtool_gset(&cp->mii_if, cmd); + spin_unlock_irqrestore(&cp->lock, flags); + + return rc; +} + +static int cp_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct cp_private *cp = netdev_priv(dev); + int rc; + unsigned long flags; + + spin_lock_irqsave(&cp->lock, flags); + rc = mii_ethtool_sset(&cp->mii_if, cmd); + spin_unlock_irqrestore(&cp->lock, flags); + + return rc; +} + +static int cp_nway_reset(struct net_device *dev) +{ + struct cp_private *cp = netdev_priv(dev); + return mii_nway_restart(&cp->mii_if); +} + +static u32 cp_get_msglevel(struct net_device *dev) +{ + struct cp_private *cp = netdev_priv(dev); + return cp->msg_enable; +} + +static void cp_set_msglevel(struct net_device *dev, u32 value) +{ + struct cp_private *cp = netdev_priv(dev); + cp->msg_enable = value; +} + +static u32 cp_get_rx_csum(struct net_device *dev) +{ + struct cp_private *cp = netdev_priv(dev); + return (cpr16(CpCmd) & RxChkSum) ? 1 : 0; +} + +static int cp_set_rx_csum(struct net_device *dev, u32 data) +{ + struct cp_private *cp = netdev_priv(dev); + u16 cmd = cp->cpcmd, newcmd; + + newcmd = cmd; + + if (data) + newcmd |= RxChkSum; + else + newcmd &= ~RxChkSum; + + if (newcmd != cmd) { + unsigned long flags; + + spin_lock_irqsave(&cp->lock, flags); + cp->cpcmd = newcmd; + cpw16_f(CpCmd, newcmd); + spin_unlock_irqrestore(&cp->lock, flags); + } + + return 0; +} + +static void cp_get_regs(struct net_device *dev, struct ethtool_regs *regs, + void *p) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned long flags; + + if (regs->len < CP_REGS_SIZE) + return /* -EINVAL */; + + regs->version = CP_REGS_VER; + + spin_lock_irqsave(&cp->lock, flags); + memcpy_fromio(p, cp->regs, CP_REGS_SIZE); + spin_unlock_irqrestore(&cp->lock, flags); +} + +static void cp_get_wol (struct net_device *dev, struct ethtool_wolinfo *wol) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave (&cp->lock, flags); + netdev_get_wol (cp, wol); + spin_unlock_irqrestore (&cp->lock, flags); +} + +static int cp_set_wol (struct net_device *dev, struct ethtool_wolinfo *wol) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned long flags; + int rc; + + spin_lock_irqsave (&cp->lock, flags); + rc = netdev_set_wol (cp, wol); + spin_unlock_irqrestore (&cp->lock, flags); + + return rc; +} + +static void cp_get_strings (struct net_device *dev, u32 stringset, u8 *buf) +{ + switch (stringset) { + case ETH_SS_STATS: + memcpy(buf, ðtool_stats_keys, sizeof(ethtool_stats_keys)); + break; + default: + BUG(); + break; + } +} + +static void cp_get_ethtool_stats (struct net_device *dev, + struct ethtool_stats *estats, u64 *tmp_stats) +{ + struct cp_private *cp = netdev_priv(dev); + unsigned int work = 100; + int i; + + /* begin NIC statistics dump */ + cpw32(StatsAddr + 4, (cp->nic_stats_dma >> 16) >> 16); + cpw32(StatsAddr, (cp->nic_stats_dma & 0xffffffff) | DumpStats); + cpr32(StatsAddr); + + while (work-- > 0) { + if ((cpr32(StatsAddr) & DumpStats) == 0) + break; + cpu_relax(); + } + + if (cpr32(StatsAddr) & DumpStats) + return /* -EIO */; + + i = 0; + tmp_stats[i++] = le64_to_cpu(cp->nic_stats->tx_ok); + tmp_stats[i++] = le64_to_cpu(cp->nic_stats->rx_ok); + tmp_stats[i++] = le64_to_cpu(cp->nic_stats->tx_err); + tmp_stats[i++] = le32_to_cpu(cp->nic_stats->rx_err); + tmp_stats[i++] = le16_to_cpu(cp->nic_stats->rx_fifo); + tmp_stats[i++] = le16_to_cpu(cp->nic_stats->frame_align); + tmp_stats[i++] = le32_to_cpu(cp->nic_stats->tx_ok_1col); + tmp_stats[i++] = le32_to_cpu(cp->nic_stats->tx_ok_mcol); + tmp_stats[i++] = le64_to_cpu(cp->nic_stats->rx_ok_phys); + tmp_stats[i++] = le64_to_cpu(cp->nic_stats->rx_ok_bcast); + tmp_stats[i++] = le32_to_cpu(cp->nic_stats->rx_ok_mcast); + tmp_stats[i++] = le16_to_cpu(cp->nic_stats->tx_abort); + tmp_stats[i++] = le16_to_cpu(cp->nic_stats->tx_underrun); + tmp_stats[i++] = cp->cp_stats.rx_frags; + if (i != CP_NUM_STATS) + BUG(); +} + +static struct ethtool_ops cp_ethtool_ops = { + .get_drvinfo = cp_get_drvinfo, + .get_regs_len = cp_get_regs_len, + .get_stats_count = cp_get_stats_count, + .get_settings = cp_get_settings, + .set_settings = cp_set_settings, + .nway_reset = cp_nway_reset, + .get_link = ethtool_op_get_link, + .get_msglevel = cp_get_msglevel, + .set_msglevel = cp_set_msglevel, + .get_rx_csum = cp_get_rx_csum, + .set_rx_csum = cp_set_rx_csum, + .get_tx_csum = ethtool_op_get_tx_csum, + .set_tx_csum = ethtool_op_set_tx_csum, /* local! */ + .get_sg = ethtool_op_get_sg, + .set_sg = ethtool_op_set_sg, + .get_regs = cp_get_regs, + .get_wol = cp_get_wol, + .set_wol = cp_set_wol, + .get_strings = cp_get_strings, + .get_ethtool_stats = cp_get_ethtool_stats, +}; + +static int cp_ioctl (struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct cp_private *cp = netdev_priv(dev); + int rc; + unsigned long flags; + + if (!netif_running(dev)) + return -EINVAL; + + spin_lock_irqsave(&cp->lock, flags); + rc = generic_mii_ioctl(&cp->mii_if, if_mii(rq), cmd, NULL); + spin_unlock_irqrestore(&cp->lock, flags); + return rc; +} + +/* Serial EEPROM section. */ + +/* EEPROM_Ctrl bits. */ +#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */ +#define EE_CS 0x08 /* EEPROM chip select. */ +#define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */ +#define EE_WRITE_0 0x00 +#define EE_WRITE_1 0x02 +#define EE_DATA_READ 0x01 /* EEPROM chip data out. */ +#define EE_ENB (0x80 | EE_CS) + +/* Delay between EEPROM clock transitions. + No extra delay is needed with 33Mhz PCI, but 66Mhz may change this. + */ + +#define eeprom_delay() readl(ee_addr) + +/* The EEPROM commands include the alway-set leading bit. */ +#define EE_WRITE_CMD (5) +#define EE_READ_CMD (6) +#define EE_ERASE_CMD (7) + +static int read_eeprom (void __iomem *ioaddr, int location, int addr_len) +{ + int i; + unsigned retval = 0; + void __iomem *ee_addr = ioaddr + Cfg9346; + int read_cmd = location | (EE_READ_CMD << addr_len); + + writeb (EE_ENB & ~EE_CS, ee_addr); + writeb (EE_ENB, ee_addr); + eeprom_delay (); + + /* Shift the read command bits out. */ + for (i = 4 + addr_len; i >= 0; i--) { + int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0; + writeb (EE_ENB | dataval, ee_addr); + eeprom_delay (); + writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr); + eeprom_delay (); + } + writeb (EE_ENB, ee_addr); + eeprom_delay (); + + for (i = 16; i > 0; i--) { + writeb (EE_ENB | EE_SHIFT_CLK, ee_addr); + eeprom_delay (); + retval = + (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 : + 0); + writeb (EE_ENB, ee_addr); + eeprom_delay (); + } + + /* Terminate the EEPROM access. */ + writeb (~EE_CS, ee_addr); + eeprom_delay (); + + return retval; +} + +/* Put the board into D3cold state and wait for WakeUp signal */ +static void cp_set_d3_state (struct cp_private *cp) +{ + pci_enable_wake (cp->pdev, 0, 1); /* Enable PME# generation */ + pci_set_power_state (cp->pdev, PCI_D3hot); +} + +static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct net_device *dev; + struct cp_private *cp; + int rc; + void __iomem *regs; + long pciaddr; + unsigned int addr_len, i, pci_using_dac; + u8 pci_rev; + +#ifndef MODULE + static int version_printed; + if (version_printed++ == 0) + printk("%s", version); +#endif + + pci_read_config_byte(pdev, PCI_REVISION_ID, &pci_rev); + + if (pdev->vendor == PCI_VENDOR_ID_REALTEK && + pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pci_rev < 0x20) { + printk(KERN_ERR PFX "pci dev %s (id %04x:%04x rev %02x) is not an 8139C+ compatible chip\n", + pci_name(pdev), pdev->vendor, pdev->device, pci_rev); + printk(KERN_ERR PFX "Try the \"8139too\" driver instead.\n"); + return -ENODEV; + } + + dev = alloc_etherdev(sizeof(struct cp_private)); + if (!dev) + return -ENOMEM; + SET_MODULE_OWNER(dev); + SET_NETDEV_DEV(dev, &pdev->dev); + + cp = netdev_priv(dev); + cp->pdev = pdev; + cp->dev = dev; + cp->msg_enable = (debug < 0 ? CP_DEF_MSG_ENABLE : debug); + spin_lock_init (&cp->lock); + cp->mii_if.dev = dev; + cp->mii_if.mdio_read = mdio_read; + cp->mii_if.mdio_write = mdio_write; + cp->mii_if.phy_id = CP_INTERNAL_PHY; + cp->mii_if.phy_id_mask = 0x1f; + cp->mii_if.reg_num_mask = 0x1f; + cp_set_rxbufsize(cp); + + rc = pci_enable_device(pdev); + if (rc) + goto err_out_free; + + rc = pci_set_mwi(pdev); + if (rc) + goto err_out_disable; + + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) + goto err_out_mwi; + + pciaddr = pci_resource_start(pdev, 1); + if (!pciaddr) { + rc = -EIO; + printk(KERN_ERR PFX "no MMIO resource for pci dev %s\n", + pci_name(pdev)); + goto err_out_res; + } + if (pci_resource_len(pdev, 1) < CP_REGS_SIZE) { + rc = -EIO; + printk(KERN_ERR PFX "MMIO resource (%lx) too small on pci dev %s\n", + pci_resource_len(pdev, 1), pci_name(pdev)); + goto err_out_res; + } + + /* Configure DMA attributes. */ + if ((sizeof(dma_addr_t) > 4) && + !pci_set_consistent_dma_mask(pdev, 0xffffffffffffffffULL) && + !pci_set_dma_mask(pdev, 0xffffffffffffffffULL)) { + pci_using_dac = 1; + } else { + pci_using_dac = 0; + + rc = pci_set_dma_mask(pdev, 0xffffffffULL); + if (rc) { + printk(KERN_ERR PFX "No usable DMA configuration, " + "aborting.\n"); + goto err_out_res; + } + rc = pci_set_consistent_dma_mask(pdev, 0xffffffffULL); + if (rc) { + printk(KERN_ERR PFX "No usable consistent DMA configuration, " + "aborting.\n"); + goto err_out_res; + } + } + + cp->cpcmd = (pci_using_dac ? PCIDAC : 0) | + PCIMulRW | RxChkSum | CpRxOn | CpTxOn; + + regs = ioremap(pciaddr, CP_REGS_SIZE); + if (!regs) { + rc = -EIO; + printk(KERN_ERR PFX "Cannot map PCI MMIO (%lx@%lx) on pci dev %s\n", + pci_resource_len(pdev, 1), pciaddr, pci_name(pdev)); + goto err_out_res; + } + dev->base_addr = (unsigned long) regs; + cp->regs = regs; + + cp_stop_hw(cp); + + /* read MAC address from EEPROM */ + addr_len = read_eeprom (regs, 0, 8) == 0x8129 ? 8 : 6; + for (i = 0; i < 3; i++) + ((u16 *) (dev->dev_addr))[i] = + le16_to_cpu (read_eeprom (regs, i + 7, addr_len)); + + dev->open = cp_open; + dev->stop = cp_close; + dev->set_multicast_list = cp_set_rx_mode; + dev->hard_start_xmit = cp_start_xmit; + dev->get_stats = cp_get_stats; + dev->do_ioctl = cp_ioctl; + dev->poll = cp_rx_poll; + dev->weight = 16; /* arbitrary? from NAPI_HOWTO.txt. */ +#ifdef BROKEN + dev->change_mtu = cp_change_mtu; +#endif + dev->ethtool_ops = &cp_ethtool_ops; +#if 0 + dev->tx_timeout = cp_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; +#endif + +#if CP_VLAN_TAG_USED + dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; + dev->vlan_rx_register = cp_vlan_rx_register; + dev->vlan_rx_kill_vid = cp_vlan_rx_kill_vid; +#endif + + if (pci_using_dac) + dev->features |= NETIF_F_HIGHDMA; + + dev->irq = pdev->irq; + + rc = register_netdev(dev); + if (rc) + goto err_out_iomap; + + printk (KERN_INFO "%s: RTL-8139C+ at 0x%lx, " + "%02x:%02x:%02x:%02x:%02x:%02x, " + "IRQ %d\n", + dev->name, + dev->base_addr, + dev->dev_addr[0], dev->dev_addr[1], + dev->dev_addr[2], dev->dev_addr[3], + dev->dev_addr[4], dev->dev_addr[5], + dev->irq); + + pci_set_drvdata(pdev, dev); + + /* enable busmastering and memory-write-invalidate */ + pci_set_master(pdev); + + if (cp->wol_enabled) cp_set_d3_state (cp); + + return 0; + +err_out_iomap: + iounmap(regs); +err_out_res: + pci_release_regions(pdev); +err_out_mwi: + pci_clear_mwi(pdev); +err_out_disable: + pci_disable_device(pdev); +err_out_free: + free_netdev(dev); + return rc; +} + +static void cp_remove_one (struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct cp_private *cp = netdev_priv(dev); + + if (!dev) + BUG(); + unregister_netdev(dev); + iounmap(cp->regs); + if (cp->wol_enabled) pci_set_power_state (pdev, PCI_D0); + pci_release_regions(pdev); + pci_clear_mwi(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + free_netdev(dev); +} + +#ifdef CONFIG_PM +static int cp_suspend (struct pci_dev *pdev, u32 state) +{ + struct net_device *dev; + struct cp_private *cp; + unsigned long flags; + + dev = pci_get_drvdata (pdev); + cp = netdev_priv(dev); + + if (!dev || !netif_running (dev)) return 0; + + netif_device_detach (dev); + netif_stop_queue (dev); + + spin_lock_irqsave (&cp->lock, flags); + + /* Disable Rx and Tx */ + cpw16 (IntrMask, 0); + cpw8 (Cmd, cpr8 (Cmd) & (~RxOn | ~TxOn)); + + spin_unlock_irqrestore (&cp->lock, flags); + + if (cp->pdev && cp->wol_enabled) { + pci_save_state (cp->pdev); + cp_set_d3_state (cp); + } + + return 0; +} + +static int cp_resume (struct pci_dev *pdev) +{ + struct net_device *dev; + struct cp_private *cp; + + dev = pci_get_drvdata (pdev); + cp = netdev_priv(dev); + + netif_device_attach (dev); + + if (cp->pdev && cp->wol_enabled) { + pci_set_power_state (cp->pdev, PCI_D0); + pci_restore_state (cp->pdev); + } + + cp_init_hw (cp); + netif_start_queue (dev); + + return 0; +} +#endif /* CONFIG_PM */ + +static struct pci_driver cp_driver = { + .name = DRV_NAME, + .id_table = cp_pci_tbl, + .probe = cp_init_one, + .remove = cp_remove_one, +#ifdef CONFIG_PM + .resume = cp_resume, + .suspend = cp_suspend, +#endif +}; + +static int __init cp_init (void) +{ +#ifdef MODULE + printk("%s", version); +#endif + return pci_module_init (&cp_driver); +} + +static void __exit cp_exit (void) +{ + pci_unregister_driver (&cp_driver); +} + +module_init(cp_init); +module_exit(cp_exit); |