diff options
Diffstat (limited to 'drivers/net/ipg.c')
| -rw-r--r-- | drivers/net/ipg.c | 2326 |
1 files changed, 2326 insertions, 0 deletions
diff --git a/drivers/net/ipg.c b/drivers/net/ipg.c new file mode 100644 index 000000000000..dfdc96fcadec --- /dev/null +++ b/drivers/net/ipg.c @@ -0,0 +1,2326 @@ +/* + * ipg.c: Device Driver for the IP1000 Gigabit Ethernet Adapter + * + * Copyright (C) 2003, 2007 IC Plus Corp + * + * Original Author: + * + * Craig Rich + * Sundance Technology, Inc. + * www.sundanceti.com + * craig_rich@sundanceti.com + * + * Current Maintainer: + * + * Sorbica Shieh. + * http://www.icplus.com.tw + * sorbica@icplus.com.tw + * + * Jesse Huang + * http://www.icplus.com.tw + * jesse@icplus.com.tw + */ +#include <linux/crc32.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/mutex.h> + +#define IPG_RX_RING_BYTES (sizeof(struct ipg_rx) * IPG_RFDLIST_LENGTH) +#define IPG_TX_RING_BYTES (sizeof(struct ipg_tx) * IPG_TFDLIST_LENGTH) +#define IPG_RESET_MASK \ + (IPG_AC_GLOBAL_RESET | IPG_AC_RX_RESET | IPG_AC_TX_RESET | \ + IPG_AC_DMA | IPG_AC_FIFO | IPG_AC_NETWORK | IPG_AC_HOST | \ + IPG_AC_AUTO_INIT) + +#define ipg_w32(val32,reg) iowrite32((val32), ioaddr + (reg)) +#define ipg_w16(val16,reg) iowrite16((val16), ioaddr + (reg)) +#define ipg_w8(val8,reg) iowrite8((val8), ioaddr + (reg)) + +#define ipg_r32(reg) ioread32(ioaddr + (reg)) +#define ipg_r16(reg) ioread16(ioaddr + (reg)) +#define ipg_r8(reg) ioread8(ioaddr + (reg)) + +#define JUMBO_FRAME_4k_ONLY +enum { + netdev_io_size = 128 +}; + +#include "ipg.h" +#define DRV_NAME "ipg" + +MODULE_AUTHOR("IC Plus Corp. 2003"); +MODULE_DESCRIPTION("IC Plus IP1000 Gigabit Ethernet Adapter Linux Driver " + DrvVer); +MODULE_LICENSE("GPL"); + +static const char *ipg_brand_name[] = { + "IC PLUS IP1000 1000/100/10 based NIC", + "Sundance Technology ST2021 based NIC", + "Tamarack Microelectronics TC9020/9021 based NIC", + "Tamarack Microelectronics TC9020/9021 based NIC", + "D-Link NIC", + "D-Link NIC IP1000A" +}; + +static struct pci_device_id ipg_pci_tbl[] __devinitdata = { + { PCI_VDEVICE(SUNDANCE, 0x1023), 0 }, + { PCI_VDEVICE(SUNDANCE, 0x2021), 1 }, + { PCI_VDEVICE(SUNDANCE, 0x1021), 2 }, + { PCI_VDEVICE(DLINK, 0x9021), 3 }, + { PCI_VDEVICE(DLINK, 0x4000), 4 }, + { PCI_VDEVICE(DLINK, 0x4020), 5 }, + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, ipg_pci_tbl); + +static inline void __iomem *ipg_ioaddr(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + return sp->ioaddr; +} + +#ifdef IPG_DEBUG +static void ipg_dump_rfdlist(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int i; + u32 offset; + + IPG_DEBUG_MSG("_dump_rfdlist\n"); + + printk(KERN_INFO "rx_current = %2.2x\n", sp->rx_current); + printk(KERN_INFO "rx_dirty = %2.2x\n", sp->rx_dirty); + printk(KERN_INFO "RFDList start address = %16.16lx\n", + (unsigned long) sp->rxd_map); + printk(KERN_INFO "RFDListPtr register = %8.8x%8.8x\n", + ipg_r32(IPG_RFDLISTPTR1), ipg_r32(IPG_RFDLISTPTR0)); + + for (i = 0; i < IPG_RFDLIST_LENGTH; i++) { + offset = (u32) &sp->rxd[i].next_desc - (u32) sp->rxd; + printk(KERN_INFO "%2.2x %4.4x RFDNextPtr = %16.16lx\n", i, + offset, (unsigned long) sp->rxd[i].next_desc); + offset = (u32) &sp->rxd[i].rfs - (u32) sp->rxd; + printk(KERN_INFO "%2.2x %4.4x RFS = %16.16lx\n", i, + offset, (unsigned long) sp->rxd[i].rfs); + offset = (u32) &sp->rxd[i].frag_info - (u32) sp->rxd; + printk(KERN_INFO "%2.2x %4.4x frag_info = %16.16lx\n", i, + offset, (unsigned long) sp->rxd[i].frag_info); + } +} + +static void ipg_dump_tfdlist(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int i; + u32 offset; + + IPG_DEBUG_MSG("_dump_tfdlist\n"); + + printk(KERN_INFO "tx_current = %2.2x\n", sp->tx_current); + printk(KERN_INFO "tx_dirty = %2.2x\n", sp->tx_dirty); + printk(KERN_INFO "TFDList start address = %16.16lx\n", + (unsigned long) sp->txd_map); + printk(KERN_INFO "TFDListPtr register = %8.8x%8.8x\n", + ipg_r32(IPG_TFDLISTPTR1), ipg_r32(IPG_TFDLISTPTR0)); + + for (i = 0; i < IPG_TFDLIST_LENGTH; i++) { + offset = (u32) &sp->txd[i].next_desc - (u32) sp->txd; + printk(KERN_INFO "%2.2x %4.4x TFDNextPtr = %16.16lx\n", i, + offset, (unsigned long) sp->txd[i].next_desc); + + offset = (u32) &sp->txd[i].tfc - (u32) sp->txd; + printk(KERN_INFO "%2.2x %4.4x TFC = %16.16lx\n", i, + offset, (unsigned long) sp->txd[i].tfc); + offset = (u32) &sp->txd[i].frag_info - (u32) sp->txd; + printk(KERN_INFO "%2.2x %4.4x frag_info = %16.16lx\n", i, + offset, (unsigned long) sp->txd[i].frag_info); + } +} +#endif + +static void ipg_write_phy_ctl(void __iomem *ioaddr, u8 data) +{ + ipg_w8(IPG_PC_RSVD_MASK & data, PHY_CTRL); + ndelay(IPG_PC_PHYCTRLWAIT_NS); +} + +static void ipg_drive_phy_ctl_low_high(void __iomem *ioaddr, u8 data) +{ + ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_LO | data); + ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_HI | data); +} + +static void send_three_state(void __iomem *ioaddr, u8 phyctrlpolarity) +{ + phyctrlpolarity |= (IPG_PC_MGMTDATA & 0) | IPG_PC_MGMTDIR; + + ipg_drive_phy_ctl_low_high(ioaddr, phyctrlpolarity); +} + +static void send_end(void __iomem *ioaddr, u8 phyctrlpolarity) +{ + ipg_w8((IPG_PC_MGMTCLK_LO | (IPG_PC_MGMTDATA & 0) | IPG_PC_MGMTDIR | + phyctrlpolarity) & IPG_PC_RSVD_MASK, PHY_CTRL); +} + +static u16 read_phy_bit(void __iomem * ioaddr, u8 phyctrlpolarity) +{ + u16 bit_data; + + ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_LO | phyctrlpolarity); + + bit_data = ((ipg_r8(PHY_CTRL) & IPG_PC_MGMTDATA) >> 1) & 1; + + ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_HI | phyctrlpolarity); + + return bit_data; +} + +/* + * Read a register from the Physical Layer device located + * on the IPG NIC, using the IPG PHYCTRL register. + */ +static int mdio_read(struct net_device * dev, int phy_id, int phy_reg) +{ + void __iomem *ioaddr = ipg_ioaddr(dev); + /* + * The GMII mangement frame structure for a read is as follows: + * + * |Preamble|st|op|phyad|regad|ta| data |idle| + * |< 32 1s>|01|10|AAAAA|RRRRR|z0|DDDDDDDDDDDDDDDD|z | + * + * <32 1s> = 32 consecutive logic 1 values + * A = bit of Physical Layer device address (MSB first) + * R = bit of register address (MSB first) + * z = High impedance state + * D = bit of read data (MSB first) + * + * Transmission order is 'Preamble' field first, bits transmitted + * left to right (first to last). + */ + struct { + u32 field; + unsigned int len; + } p[] = { + { GMII_PREAMBLE, 32 }, /* Preamble */ + { GMII_ST, 2 }, /* ST */ + { GMII_READ, 2 }, /* OP */ + { phy_id, 5 }, /* PHYAD */ + { phy_reg, 5 }, /* REGAD */ + { 0x0000, 2 }, /* TA */ + { 0x0000, 16 }, /* DATA */ + { 0x0000, 1 } /* IDLE */ + }; + unsigned int i, j; + u8 polarity, data; + + polarity = ipg_r8(PHY_CTRL); + polarity &= (IPG_PC_DUPLEX_POLARITY | IPG_PC_LINK_POLARITY); + + /* Create the Preamble, ST, OP, PHYAD, and REGAD field. */ + for (j = 0; j < 5; j++) { + for (i = 0; i < p[j].len; i++) { + /* For each variable length field, the MSB must be + * transmitted first. Rotate through the field bits, + * starting with the MSB, and move each bit into the + * the 1st (2^1) bit position (this is the bit position + * corresponding to the MgmtData bit of the PhyCtrl + * register for the IPG). + * + * Example: ST = 01; + * + * First write a '0' to bit 1 of the PhyCtrl + * register, then write a '1' to bit 1 of the + * PhyCtrl register. + * + * To do this, right shift the MSB of ST by the value: + * [field length - 1 - #ST bits already written] + * then left shift this result by 1. + */ + data = (p[j].field >> (p[j].len - 1 - i)) << 1; + data &= IPG_PC_MGMTDATA; + data |= polarity | IPG_PC_MGMTDIR; + + ipg_drive_phy_ctl_low_high(ioaddr, data); + } + } + + send_three_state(ioaddr, polarity); + + read_phy_bit(ioaddr, polarity); + + /* + * For a read cycle, the bits for the next two fields (TA and + * DATA) are driven by the PHY (the IPG reads these bits). + */ + for (i = 0; i < p[6].len; i++) { + p[6].field |= + (read_phy_bit(ioaddr, polarity) << (p[6].len - 1 - i)); + } + + send_three_state(ioaddr, polarity); + send_three_state(ioaddr, polarity); + send_three_state(ioaddr, polarity); + send_end(ioaddr, polarity); + + /* Return the value of the DATA field. */ + return p[6].field; +} + +/* + * Write to a register from the Physical Layer device located + * on the IPG NIC, using the IPG PHYCTRL register. + */ +static void mdio_write(struct net_device *dev, int phy_id, int phy_reg, int val) +{ + void __iomem *ioaddr = ipg_ioaddr(dev); + /* + * The GMII mangement frame structure for a read is as follows: + * + * |Preamble|st|op|phyad|regad|ta| data |idle| + * |< 32 1s>|01|10|AAAAA|RRRRR|z0|DDDDDDDDDDDDDDDD|z | + * + * <32 1s> = 32 consecutive logic 1 values + * A = bit of Physical Layer device address (MSB first) + * R = bit of register address (MSB first) + * z = High impedance state + * D = bit of write data (MSB first) + * + * Transmission order is 'Preamble' field first, bits transmitted + * left to right (first to last). + */ + struct { + u32 field; + unsigned int len; + } p[] = { + { GMII_PREAMBLE, 32 }, /* Preamble */ + { GMII_ST, 2 }, /* ST */ + { GMII_WRITE, 2 }, /* OP */ + { phy_id, 5 }, /* PHYAD */ + { phy_reg, 5 }, /* REGAD */ + { 0x0002, 2 }, /* TA */ + { val & 0xffff, 16 }, /* DATA */ + { 0x0000, 1 } /* IDLE */ + }; + unsigned int i, j; + u8 polarity, data; + + polarity = ipg_r8(PHY_CTRL); + polarity &= (IPG_PC_DUPLEX_POLARITY | IPG_PC_LINK_POLARITY); + + /* Create the Preamble, ST, OP, PHYAD, and REGAD field. */ + for (j = 0; j < 7; j++) { + for (i = 0; i < p[j].len; i++) { + /* For each variable length field, the MSB must be + * transmitted first. Rotate through the field bits, + * starting with the MSB, and move each bit into the + * the 1st (2^1) bit position (this is the bit position + * corresponding to the MgmtData bit of the PhyCtrl + * register for the IPG). + * + * Example: ST = 01; + * + * First write a '0' to bit 1 of the PhyCtrl + * register, then write a '1' to bit 1 of the + * PhyCtrl register. + * + * To do this, right shift the MSB of ST by the value: + * [field length - 1 - #ST bits already written] + * then left shift this result by 1. + */ + data = (p[j].field >> (p[j].len - 1 - i)) << 1; + data &= IPG_PC_MGMTDATA; + data |= polarity | IPG_PC_MGMTDIR; + + ipg_drive_phy_ctl_low_high(ioaddr, data); + } + } + + /* The last cycle is a tri-state, so read from the PHY. */ + for (j = 7; j < 8; j++) { + for (i = 0; i < p[j].len; i++) { + ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_LO | polarity); + + p[j].field |= ((ipg_r8(PHY_CTRL) & + IPG_PC_MGMTDATA) >> 1) << (p[j].len - 1 - i); + + ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_HI | polarity); + } + } +} + +/* Set LED_Mode JES20040127EEPROM */ +static void ipg_set_led_mode(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + u32 mode; + + mode = ipg_r32(ASIC_CTRL); + mode &= ~(IPG_AC_LED_MODE_BIT_1 | IPG_AC_LED_MODE | IPG_AC_LED_SPEED); + + if ((sp->LED_Mode & 0x03) > 1) + mode |= IPG_AC_LED_MODE_BIT_1; /* Write Asic Control Bit 29 */ + + if ((sp->LED_Mode & 0x01) == 1) + mode |= IPG_AC_LED_MODE; /* Write Asic Control Bit 14 */ + + if ((sp->LED_Mode & 0x08) == 8) + mode |= IPG_AC_LED_SPEED; /* Write Asic Control Bit 27 */ + + ipg_w32(mode, ASIC_CTRL); +} + +/* Set PHYSet JES20040127EEPROM */ +static void ipg_set_phy_set(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + int physet; + + physet = ipg_r8(PHY_SET); + physet &= ~(IPG_PS_MEM_LENB9B | IPG_PS_MEM_LEN9 | IPG_PS_NON_COMPDET); + physet |= ((sp->LED_Mode & 0x70) >> 4); + ipg_w8(physet, PHY_SET); +} + +static int ipg_reset(struct net_device *dev, u32 resetflags) +{ + /* Assert functional resets via the IPG AsicCtrl + * register as specified by the 'resetflags' input + * parameter. + */ + void __iomem *ioaddr = ipg_ioaddr(dev); //JES20040127EEPROM: + unsigned int timeout_count = 0; + + IPG_DEBUG_MSG("_reset\n"); + + ipg_w32(ipg_r32(ASIC_CTRL) | resetflags, ASIC_CTRL); + + /* Delay added to account for problem with 10Mbps reset. */ + mdelay(IPG_AC_RESETWAIT); + + while (IPG_AC_RESET_BUSY & ipg_r32(ASIC_CTRL)) { + mdelay(IPG_AC_RESETWAIT); + if (++timeout_count > IPG_AC_RESET_TIMEOUT) + return -ETIME; + } + /* Set LED Mode in Asic Control JES20040127EEPROM */ + ipg_set_led_mode(dev); + + /* Set PHYSet Register Value JES20040127EEPROM */ + ipg_set_phy_set(dev); + return 0; +} + +/* Find the GMII PHY address. */ +static int ipg_find_phyaddr(struct net_device *dev) +{ + unsigned int phyaddr, i; + + for (i = 0; i < 32; i++) { + u32 status; + + /* Search for the correct PHY address among 32 possible. */ + phyaddr = (IPG_NIC_PHY_ADDRESS + i) % 32; + + /* 10/22/03 Grace change verify from GMII_PHY_STATUS to + GMII_PHY_ID1 + */ + + status = mdio_read(dev, phyaddr, MII_BMSR); + + if ((status != 0xFFFF) && (status != 0)) + return phyaddr; + } + + return 0x1f; +} + +/* + * Configure IPG based on result of IEEE 802.3 PHY + * auto-negotiation. + */ +static int ipg_config_autoneg(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int txflowcontrol; + unsigned int rxflowcontrol; + unsigned int fullduplex; + unsigned int gig; + u32 mac_ctrl_val; + u32 asicctrl; + u8 phyctrl; + + IPG_DEBUG_MSG("_config_autoneg\n"); + + asicctrl = ipg_r32(ASIC_CTRL); + phyctrl = ipg_r8(PHY_CTRL); + mac_ctrl_val = ipg_r32(MAC_CTRL); + + /* Set flags for use in resolving auto-negotation, assuming + * non-1000Mbps, half duplex, no flow control. + */ + fullduplex = 0; + txflowcontrol = 0; + rxflowcontrol = 0; + gig = 0; + + /* To accomodate a problem in 10Mbps operation, + * set a global flag if PHY running in 10Mbps mode. + */ + sp->tenmbpsmode = 0; + + printk(KERN_INFO "%s: Link speed = ", dev->name); + + /* Determine actual speed of operation. */ + switch (phyctrl & IPG_PC_LINK_SPEED) { + case IPG_PC_LINK_SPEED_10MBPS: + printk("10Mbps.\n"); + printk(KERN_INFO "%s: 10Mbps operational mode enabled.\n", + dev->name); + sp->tenmbpsmode = 1; + break; + case IPG_PC_LINK_SPEED_100MBPS: + printk("100Mbps.\n"); + break; + case IPG_PC_LINK_SPEED_1000MBPS: + printk("1000Mbps.\n"); + gig = 1; + break; + default: + printk("undefined!\n"); + return 0; + } + + if (phyctrl & IPG_PC_DUPLEX_STATUS) { + fullduplex = 1; + txflowcontrol = 1; + rxflowcontrol = 1; + } + + /* Configure full duplex, and flow control. */ + if (fullduplex == 1) { + /* Configure IPG for full duplex operation. */ + printk(KERN_INFO "%s: setting full duplex, ", dev->name); + + mac_ctrl_val |= IPG_MC_DUPLEX_SELECT_FD; + + if (txflowcontrol == 1) { + printk("TX flow control"); + mac_ctrl_val |= IPG_MC_TX_FLOW_CONTROL_ENABLE; + } else { + printk("no TX flow control"); + mac_ctrl_val &= ~IPG_MC_TX_FLOW_CONTROL_ENABLE; + } + + if (rxflowcontrol == 1) { + printk(", RX flow control."); + mac_ctrl_val |= IPG_MC_RX_FLOW_CONTROL_ENABLE; + } else { + printk(", no RX flow control."); + mac_ctrl_val &= ~IPG_MC_RX_FLOW_CONTROL_ENABLE; + } + + printk("\n"); + } else { + /* Configure IPG for half duplex operation. */ + printk(KERN_INFO "%s: setting half duplex, " + "no TX flow control, no RX flow control.\n", dev->name); + + mac_ctrl_val &= ~IPG_MC_DUPLEX_SELECT_FD & + ~IPG_MC_TX_FLOW_CONTROL_ENABLE & + ~IPG_MC_RX_FLOW_CONTROL_ENABLE; + } + ipg_w32(mac_ctrl_val, MAC_CTRL); + return 0; +} + +/* Determine and configure multicast operation and set + * receive mode for IPG. + */ +static void ipg_nic_set_multicast_list(struct net_device *dev) +{ + void __iomem *ioaddr = ipg_ioaddr(dev); + struct dev_mc_list *mc_list_ptr; + unsigned int hashindex; + u32 hashtable[2]; + u8 receivemode; + + IPG_DEBUG_MSG("_nic_set_multicast_list\n"); + + receivemode = IPG_RM_RECEIVEUNICAST | IPG_RM_RECEIVEBROADCAST; + + if (dev->flags & IFF_PROMISC) { + /* NIC to be configured in promiscuous mode. */ + receivemode = IPG_RM_RECEIVEALLFRAMES; + } else if ((dev->flags & IFF_ALLMULTI) || + (dev->flags & IFF_MULTICAST & + (dev->mc_count > IPG_MULTICAST_HASHTABLE_SIZE))) { + /* NIC to be configured to receive all multicast + * frames. */ + receivemode |= IPG_RM_RECEIVEMULTICAST; + } else if (dev->flags & IFF_MULTICAST & (dev->mc_count > 0)) { + /* NIC to be configured to receive selected + * multicast addresses. */ + receivemode |= IPG_RM_RECEIVEMULTICASTHASH; + } + + /* Calculate the bits to set for the 64 bit, IPG HASHTABLE. + * The IPG applies a cyclic-redundancy-check (the same CRC + * used to calculate the frame data FCS) to the destination + * address all incoming multicast frames whose destination + * address has the multicast bit set. The least significant + * 6 bits of the CRC result are used as an addressing index + * into the hash table. If the value of the bit addressed by + * this index is a 1, the frame is passed to the host system. + */ + + /* Clear hashtable. */ + hashtable[0] = 0x00000000; + hashtable[1] = 0x00000000; + + /* Cycle through all multicast addresses to filter. */ + for (mc_list_ptr = dev->mc_list; + mc_list_ptr != NULL; mc_list_ptr = mc_list_ptr->next) { + /* Calculate CRC result for each multicast address. */ + hashindex = crc32_le(0xffffffff, mc_list_ptr->dmi_addr, + ETH_ALEN); + + /* Use only the least significant 6 bits. */ + hashindex = hashindex & 0x3F; + + /* Within "hashtable", set bit number "hashindex" + * to a logic 1. + */ + set_bit(hashindex, (void *)hashtable); + } + + /* Write the value of the hashtable, to the 4, 16 bit + * HASHTABLE IPG registers. + */ + ipg_w32(hashtable[0], HASHTABLE_0); + ipg_w32(hashtable[1], HASHTABLE_1); + + ipg_w8(IPG_RM_RSVD_MASK & receivemode, RECEIVE_MODE); + + IPG_DEBUG_MSG("ReceiveMode = %x\n", ipg_r8(RECEIVE_MODE)); +} + +static int ipg_io_config(struct net_device *dev) +{ + void __iomem *ioaddr = ipg_ioaddr(dev); + u32 origmacctrl; + u32 restoremacctrl; + + IPG_DEBUG_MSG("_io_config\n"); + + origmacctrl = ipg_r32(MAC_CTRL); + + restoremacctrl = origmacctrl | IPG_MC_STATISTICS_ENABLE; + + /* Based on compilation option, determine if FCS is to be + * stripped on receive frames by IPG. + */ + if (!IPG_STRIP_FCS_ON_RX) + restoremacctrl |= IPG_MC_RCV_FCS; + + /* Determine if transmitter and/or receiver are + * enabled so we may restore MACCTRL correctly. + */ + if (origmacctrl & IPG_MC_TX_ENABLED) + restoremacctrl |= IPG_MC_TX_ENABLE; + + if (origmacctrl & IPG_MC_RX_ENABLED) + restoremacctrl |= IPG_MC_RX_ENABLE; + + /* Transmitter and receiver must be disabled before setting + * IFSSelect. + */ + ipg_w32((origmacctrl & (IPG_MC_RX_DISABLE | IPG_MC_TX_DISABLE)) & + IPG_MC_RSVD_MASK, MAC_CTRL); + + /* Now that transmitter and receiver are disabled, write + * to IFSSelect. + */ + ipg_w32((origmacctrl & IPG_MC_IFS_96BIT) & IPG_MC_RSVD_MASK, MAC_CTRL); + + /* Set RECEIVEMODE register. */ + ipg_nic_set_multicast_list(dev); + + ipg_w16(IPG_MAX_RXFRAME_SIZE, MAX_FRAME_SIZE); + + ipg_w8(IPG_RXDMAPOLLPERIOD_VALUE, RX_DMA_POLL_PERIOD); + ipg_w8(IPG_RXDMAURGENTTHRESH_VALUE, RX_DMA_URGENT_THRESH); + ipg_w8(IPG_RXDMABURSTTHRESH_VALUE, RX_DMA_BURST_THRESH); + ipg_w8(IPG_TXDMAPOLLPERIOD_VALUE, TX_DMA_POLL_PERIOD); + ipg_w8(IPG_TXDMAURGENTTHRESH_VALUE, TX_DMA_URGENT_THRESH); + ipg_w8(IPG_TXDMABURSTTHRESH_VALUE, TX_DMA_BURST_THRESH); + ipg_w16((IPG_IE_HOST_ERROR | IPG_IE_TX_DMA_COMPLETE | + IPG_IE_TX_COMPLETE | IPG_IE_INT_REQUESTED | + IPG_IE_UPDATE_STATS | IPG_IE_LINK_EVENT | + IPG_IE_RX_DMA_COMPLETE | IPG_IE_RX_DMA_PRIORITY), INT_ENABLE); + ipg_w16(IPG_FLOWONTHRESH_VALUE, FLOW_ON_THRESH); + ipg_w16(IPG_FLOWOFFTHRESH_VALUE, FLOW_OFF_THRESH); + + /* IPG multi-frag frame bug workaround. + * Per silicon revision B3 eratta. + */ + ipg_w16(ipg_r16(DEBUG_CTRL) | 0x0200, DEBUG_CTRL); + + /* IPG TX poll now bug workaround. + * Per silicon revision B3 eratta. + */ + ipg_w16(ipg_r16(DEBUG_CTRL) | 0x0010, DEBUG_CTRL); + + /* IPG RX poll now bug workaround. + * Per silicon revision B3 eratta. + */ + ipg_w16(ipg_r16(DEBUG_CTRL) | 0x0020, DEBUG_CTRL); + + /* Now restore MACCTRL to original setting. */ + ipg_w32(IPG_MC_RSVD_MASK & restoremacctrl, MAC_CTRL); + + /* Disable unused RMON statistics. */ + ipg_w32(IPG_RZ_ALL, RMON_STATISTICS_MASK); + + /* Disable unused MIB statistics. */ + ipg_w32(IPG_SM_MACCONTROLFRAMESXMTD | IPG_SM_MACCONTROLFRAMESRCVD | + IPG_SM_BCSTOCTETXMTOK_BCSTFRAMESXMTDOK | IPG_SM_TXJUMBOFRAMES | + IPG_SM_MCSTOCTETXMTOK_MCSTFRAMESXMTDOK | IPG_SM_RXJUMBOFRAMES | + IPG_SM_BCSTOCTETRCVDOK_BCSTFRAMESRCVDOK | + IPG_SM_UDPCHECKSUMERRORS | IPG_SM_TCPCHECKSUMERRORS | + IPG_SM_IPCHECKSUMERRORS, STATISTICS_MASK); + + return 0; +} + +/* + * Create a receive buffer within system memory and update + * NIC private structure appropriately. + */ +static int ipg_get_rxbuff(struct net_device *dev, int entry) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + struct ipg_rx *rxfd = sp->rxd + entry; + struct sk_buff *skb; + u64 rxfragsize; + + IPG_DEBUG_MSG("_get_rxbuff\n"); + + skb = netdev_alloc_skb(dev, IPG_RXSUPPORT_SIZE + NET_IP_ALIGN); + if (!skb) { + sp->RxBuff[entry] = NULL; + return -ENOMEM; + } + + /* Adjust the data start location within the buffer to + * align IP address field to a 16 byte boundary. + */ + skb_reserve(skb, NET_IP_ALIGN); + + /* Associate the receive buffer with the IPG NIC. */ + skb->dev = dev; + + /* Save the address of the sk_buff structure. */ + sp->RxBuff[entry] = skb; + + rxfd->frag_info = cpu_to_le64(pci_map_single(sp->pdev, skb->data, + sp->rx_buf_sz, PCI_DMA_FROMDEVICE)); + + /* Set the RFD fragment length. */ + rxfragsize = IPG_RXFRAG_SIZE; + rxfd->frag_info |= cpu_to_le64((rxfragsize << 48) & IPG_RFI_FRAGLEN); + + return 0; +} + +static int init_rfdlist(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int i; + + IPG_DEBUG_MSG("_init_rfdlist\n"); + + for (i = 0; i < IPG_RFDLIST_LENGTH; i++) { + struct ipg_rx *rxfd = sp->rxd + i; + + if (sp->RxBuff[i]) { + pci_unmap_single(sp->pdev, + le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN), + sp->rx_buf_sz, PCI_DMA_FROMDEVICE); + IPG_DEV_KFREE_SKB(sp->RxBuff[i]); + sp->RxBuff[i] = NULL; + } + + /* Clear out the RFS field. */ + rxfd->rfs = 0x0000000000000000; + + if (ipg_get_rxbuff(dev, i) < 0) { + /* + * A receive buffer was not ready, break the + * RFD list here. + */ + IPG_DEBUG_MSG("Cannot allocate Rx buffer.\n"); + + /* Just in case we cannot allocate a single RFD. + * Should not occur. + */ + if (i == 0) { + printk(KERN_ERR "%s: No memory available" + " for RFD list.\n", dev->name); + return -ENOMEM; + } + } + + rxfd->next_desc = cpu_to_le64(sp->rxd_map + + sizeof(struct ipg_rx)*(i + 1)); + } + sp->rxd[i - 1].next_desc = cpu_to_le64(sp->rxd_map); + + sp->rx_current = 0; + sp->rx_dirty = 0; + + /* Write the location of the RFDList to the IPG. */ + ipg_w32((u32) sp->rxd_map, RFD_LIST_PTR_0); + ipg_w32(0x00000000, RFD_LIST_PTR_1); + + return 0; +} + +static void init_tfdlist(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int i; + + IPG_DEBUG_MSG("_init_tfdlist\n"); + + for (i = 0; i < IPG_TFDLIST_LENGTH; i++) { + struct ipg_tx *txfd = sp->txd + i; + + txfd->tfc = cpu_to_le64(IPG_TFC_TFDDONE); + + if (sp->TxBuff[i]) { + IPG_DEV_KFREE_SKB(sp->TxBuff[i]); + sp->TxBuff[i] = NULL; + } + + txfd->next_desc = cpu_to_le64(sp->txd_map + + sizeof(struct ipg_tx)*(i + 1)); + } + sp->txd[i - 1].next_desc = cpu_to_le64(sp->txd_map); + + sp->tx_current = 0; + sp->tx_dirty = 0; + + /* Write the location of the TFDList to the IPG. */ + IPG_DDEBUG_MSG("Starting TFDListPtr = %8.8x\n", + (u32) sp->txd_map); + ipg_w32((u32) sp->txd_map, TFD_LIST_PTR_0); + ipg_w32(0x00000000, TFD_LIST_PTR_1); + + sp->ResetCurrentTFD = 1; +} + +/* + * Free all transmit buffers which have already been transfered + * via DMA to the IPG. + */ +static void ipg_nic_txfree(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + const unsigned int curr = ipg_r32(TFD_LIST_PTR_0) - + (sp->txd_map / sizeof(struct ipg_tx)) - 1; + unsigned int released, pending; + + IPG_DEBUG_MSG("_nic_txfree\n"); + + pending = sp->tx_current - sp->tx_dirty; + + for (released = 0; released < pending; released++) { + unsigned int dirty = sp->tx_dirty % IPG_TFDLIST_LENGTH; + struct sk_buff *skb = sp->TxBuff[dirty]; + struct ipg_tx *txfd = sp->txd + dirty; + + IPG_DEBUG_MSG("TFC = %16.16lx\n", (unsigned long) txfd->tfc); + + /* Look at each TFD's TFC field beginning + * at the last freed TFD up to the current TFD. + * If the TFDDone bit is set, free the associated + * buffer. + */ + if (dirty == curr) + break; + + /* Setup TFDDONE for compatible issue. */ + txfd->tfc |= cpu_to_le64(IPG_TFC_TFDDONE); + + /* Free the transmit buffer. */ + if (skb) { + pci_unmap_single(sp->pdev, + le64_to_cpu(txfd->frag_info & ~IPG_TFI_FRAGLEN), + skb->len, PCI_DMA_TODEVICE); + + IPG_DEV_KFREE_SKB(skb); + + sp->TxBuff[dirty] = NULL; + } + } + + sp->tx_dirty += released; + + if (netif_queue_stopped(dev) && + (sp->tx_current != (sp->tx_dirty + IPG_TFDLIST_LENGTH))) { + netif_wake_queue(dev); + } +} + +static void ipg_tx_timeout(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + + ipg_reset(dev, IPG_AC_TX_RESET | IPG_AC_DMA | IPG_AC_NETWORK | + IPG_AC_FIFO); + + spin_lock_irq(&sp->lock); + + /* Re-configure after DMA reset. */ + if (ipg_io_config(dev) < 0) { + printk(KERN_INFO "%s: Error during re-configuration.\n", + dev->name); + } + + init_tfdlist(dev); + + spin_unlock_irq(&sp->lock); + + ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_TX_ENABLE) & IPG_MC_RSVD_MASK, + MAC_CTRL); +} + +/* + * For TxComplete interrupts, free all transmit + * buffers which have already been transfered via DMA + * to the IPG. + */ +static void ipg_nic_txcleanup(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int i; + + IPG_DEBUG_MSG("_nic_txcleanup\n"); + + for (i = 0; i < IPG_TFDLIST_LENGTH; i++) { + /* Reading the TXSTATUS register clears the + * TX_COMPLETE interrupt. + */ + u32 txstatusdword = ipg_r32(TX_STATUS); + + IPG_DEBUG_MSG("TxStatus = %8.8x\n", txstatusdword); + + /* Check for Transmit errors. Error bits only valid if + * TX_COMPLETE bit in the TXSTATUS register is a 1. + */ + if (!(txstatusdword & IPG_TS_TX_COMPLETE)) + break; + + /* If in 10Mbps mode, indicate transmit is ready. */ + if (sp->tenmbpsmode) { + netif_wake_queue(dev); + } + + /* Transmit error, increment stat counters. */ + if (txstatusdword & IPG_TS_TX_ERROR) { + IPG_DEBUG_MSG("Transmit error.\n"); + sp->stats.tx_errors++; + } + + /* Late collision, re-enable transmitter. */ + if (txstatusdword & IPG_TS_LATE_COLLISION) { + IPG_DEBUG_MSG("Late collision on transmit.\n"); + ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_TX_ENABLE) & + IPG_MC_RSVD_MASK, MAC_CTRL); + } + + /* Maximum collisions, re-enable transmitter. */ + if (txstatusdword & IPG_TS_TX_MAX_COLL) { + IPG_DEBUG_MSG("Maximum collisions on transmit.\n"); + ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_TX_ENABLE) & + IPG_MC_RSVD_MASK, MAC_CTRL); + } + + /* Transmit underrun, reset and re-enable + * transmitter. + */ + if (txstatusdword & IPG_TS_TX_UNDERRUN) { + IPG_DEBUG_MSG("Transmitter underrun.\n"); + sp->stats.tx_fifo_errors++; + ipg_reset(dev, IPG_AC_TX_RESET | IPG_AC_DMA | + IPG_AC_NETWORK | IPG_AC_FIFO); + + /* Re-configure after DMA reset. */ + if (ipg_io_config(dev) < 0) { + printk(KERN_INFO + "%s: Error during re-configuration.\n", + dev->name); + } + init_tfdlist(dev); + + ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_TX_ENABLE) & + IPG_MC_RSVD_MASK, MAC_CTRL); + } + } + + ipg_nic_txfree(dev); +} + +/* Provides statistical information about the IPG NIC. */ +struct net_device_stats *ipg_nic_get_stats(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + u16 temp1; + u16 temp2; + + IPG_DEBUG_MSG("_nic_get_stats\n"); + + /* Check to see if the NIC has been initialized via nic_open, + * before trying to read statistic registers. + */ + if (!test_bit(__LINK_STATE_START, &dev->state)) + return &sp->stats; + + sp->stats.rx_packets += ipg_r32(IPG_FRAMESRCVDOK); + sp->stats.tx_packets += ipg_r32(IPG_FRAMESXMTDOK); + sp->stats.rx_bytes += ipg_r32(IPG_OCTETRCVOK); + sp->stats.tx_bytes += ipg_r32(IPG_OCTETXMTOK); + temp1 = ipg_r16(IPG_FRAMESLOSTRXERRORS); + sp->stats.rx_errors += temp1; + sp->stats.rx_missed_errors += temp1; + temp1 = ipg_r32(IPG_SINGLECOLFRAMES) + ipg_r32(IPG_MULTICOLFRAMES) + + ipg_r32(IPG_LATECOLLISIONS); + temp2 = ipg_r16(IPG_CARRIERSENSEERRORS); + sp->stats.collisions += temp1; + sp->stats.tx_dropped += ipg_r16(IPG_FRAMESABORTXSCOLLS); + sp->stats.tx_errors += ipg_r16(IPG_FRAMESWEXDEFERRAL) + + ipg_r32(IPG_FRAMESWDEFERREDXMT) + temp1 + temp2; + sp->stats.multicast += ipg_r32(IPG_MCSTOCTETRCVDOK); + + /* detailed tx_errors */ + sp->stats.tx_carrier_errors += temp2; + + /* detailed rx_errors */ + sp->stats.rx_length_errors += ipg_r16(IPG_INRANGELENGTHERRORS) + + ipg_r16(IPG_FRAMETOOLONGERRRORS); + sp->stats.rx_crc_errors += ipg_r16(IPG_FRAMECHECKSEQERRORS); + + /* Unutilized IPG statistic registers. */ + ipg_r32(IPG_MCSTFRAMESRCVDOK); + + return &sp->stats; +} + +/* Restore used receive buffers. */ +static int ipg_nic_rxrestore(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + const unsigned int curr = sp->rx_current; + unsigned int dirty = sp->rx_dirty; + + IPG_DEBUG_MSG("_nic_rxrestore\n"); + + for (dirty = sp->rx_dirty; curr - dirty > 0; dirty++) { + unsigned int entry = dirty % IPG_RFDLIST_LENGTH; + + /* rx_copybreak may poke hole here and there. */ + if (sp->RxBuff[entry]) + continue; + + /* Generate a new receive buffer to replace the + * current buffer (which will be released by the + * Linux system). + */ + if (ipg_get_rxbuff(dev, entry) < 0) { + IPG_DEBUG_MSG("Cannot allocate new Rx buffer.\n"); + + break; + } + + /* Reset the RFS field. */ + sp->rxd[entry].rfs = 0x0000000000000000; + } + sp->rx_dirty = dirty; + + return 0; +} + +#ifdef JUMBO_FRAME + +/* use jumboindex and jumbosize to control jumbo frame status + initial status is jumboindex=-1 and jumbosize=0 + 1. jumboindex = -1 and jumbosize=0 : previous jumbo frame has been done. + 2. jumboindex != -1 and jumbosize != 0 : jumbo frame is not over size and receiving + 3. jumboindex = -1 and jumbosize != 0 : jumbo frame is over size, already dump + previous receiving and need to continue dumping the current one +*/ +enum { + NormalPacket, + ErrorPacket +}; + +enum { + Frame_NoStart_NoEnd = 0, + Frame_WithStart = 1, + Frame_WithEnd = 10, + Frame_WithStart_WithEnd = 11 +}; + +inline void ipg_nic_rx_free_skb(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + unsigned int entry = sp->rx_current % IPG_RFDLIST_LENGTH; + + if (sp->RxBuff[entry]) { + struct ipg_rx *rxfd = sp->rxd + entry; + + pci_unmap_single(sp->pdev, + le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN), + sp->rx_buf_sz, PCI_DMA_FROMDEVICE); + IPG_DEV_KFREE_SKB(sp->RxBuff[entry]); + sp->RxBuff[entry] = NULL; + } +} + +inline int ipg_nic_rx_check_frame_type(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + struct ipg_rx *rxfd = sp->rxd + (sp->rx_current % IPG_RFDLIST_LENGTH); + int type = Frame_NoStart_NoEnd; + + if (le64_to_cpu(rxfd->rfs) & IPG_RFS_FRAMESTART) + type += Frame_WithStart; + if (le64_to_cpu(rxfd->rfs) & IPG_RFS_FRAMEEND) + type += Frame_WithEnd; + return type; +} + +inline int ipg_nic_rx_check_error(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + unsigned int entry = sp->rx_current % IPG_RFDLIST_LENGTH; + struct ipg_rx *rxfd = sp->rxd + entry; + + if (IPG_DROP_ON_RX_ETH_ERRORS && (le64_to_cpu(rxfd->rfs) & + (IPG_RFS_RXFIFOOVERRUN | IPG_RFS_RXRUNTFRAME | + IPG_RFS_RXALIGNMENTERROR | IPG_RFS_RXFCSERROR | + IPG_RFS_RXOVERSIZEDFRAME | IPG_RFS_RXLENGTHERROR))) { + IPG_DEBUG_MSG("Rx error, RFS = %16.16lx\n", + (unsigned long) rxfd->rfs); + + /* Increment general receive error statistic. */ + sp->stats.rx_errors++; + + /* Increment detailed receive error statistics. */ + if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFIFOOVERRUN) { + IPG_DEBUG_MSG("RX FIFO overrun occured.\n"); + + sp->stats.rx_fifo_errors++; + } + + if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXRUNTFRAME) { + IPG_DEBUG_MSG("RX runt occured.\n"); + sp->stats.rx_length_errors++; + } + + /* Do nothing for IPG_RFS_RXOVERSIZEDFRAME, + * error count handled by a IPG statistic register. + */ + + if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXALIGNMENTERROR) { + IPG_DEBUG_MSG("RX alignment error occured.\n"); + sp->stats.rx_frame_errors++; + } + + /* Do nothing for IPG_RFS_RXFCSERROR, error count + * handled by a IPG statistic register. + */ + + /* Free the memory associated with the RX + * buffer since it is erroneous and we will + * not pass it to higher layer processes. + */ + if (sp->RxBuff[entry]) { + pci_unmap_single(sp->pdev, + le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN), + sp->rx_buf_sz, PCI_DMA_FROMDEVICE); + + IPG_DEV_KFREE_SKB(sp->RxBuff[entry]); + sp->RxBuff[entry] = NULL; + } + return ErrorPacket; + } + return NormalPacket; +} + +static void ipg_nic_rx_with_start_and_end(struct net_device *dev, + struct ipg_nic_private *sp, + struct ipg_rx *rxfd, unsigned entry) +{ + struct SJumbo *jumbo = &sp->Jumbo; + struct sk_buff *skb; + int framelen; + + if (jumbo->FoundStart) { + IPG_DEV_KFREE_SKB(jumbo->skb); + jumbo->FoundStart = 0; + jumbo->CurrentSize = 0; + jumbo->skb = NULL; + } + + // 1: found error, 0 no error + if (ipg_nic_rx_check_error(dev) != NormalPacket) + return; + + skb = sp->RxBuff[entry]; + if (!skb) + return; + + // accept this frame and send to upper layer + framelen = le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFRAMELEN; + if (framelen > IPG_RXFRAG_SIZE) + framelen = IPG_RXFRAG_SIZE; + + skb_put(skb, framelen); + skb->protocol = eth_type_trans(skb, dev); + skb->ip_summed = CHECKSUM_NONE; + netif_rx(skb); + dev->last_rx = jiffies; + sp->RxBuff[entry] = NULL; +} + +static void ipg_nic_rx_with_start(struct net_device *dev, + struct ipg_nic_private *sp, + struct ipg_rx *rxfd, unsigned entry) +{ + struct SJumbo *jumbo = &sp->Jumbo; + struct pci_dev *pdev = sp->pdev; + struct sk_buff *skb; + + // 1: found error, 0 no error + if (ipg_nic_rx_check_error(dev) != NormalPacket) + return; + + // accept this frame and send to upper layer + skb = sp->RxBuff[entry]; + if (!skb) + return; + + if (jumbo->FoundStart) + IPG_DEV_KFREE_SKB(jumbo->skb); + + pci_unmap_single(pdev, le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN), + sp->rx_buf_sz, PCI_DMA_FROMDEVICE); + + skb_put(skb, IPG_RXFRAG_SIZE); + + jumbo->FoundStart = 1; + jumbo->CurrentSize = IPG_RXFRAG_SIZE; + jumbo->skb = skb; + + sp->RxBuff[entry] = NULL; + dev->last_rx = jiffies; +} + +static void ipg_nic_rx_with_end(struct net_device *dev, + struct ipg_nic_private *sp, + struct ipg_rx *rxfd, unsigned entry) +{ + struct SJumbo *jumbo = &sp->Jumbo; + + //1: found error, 0 no error + if (ipg_nic_rx_check_error(dev) == NormalPacket) { + struct sk_buff *skb = sp->RxBuff[entry]; + + if (!skb) + return; + + if (jumbo->FoundStart) { + int framelen, endframelen; + + framelen = le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFRAMELEN; + + endframeLen = framelen - jumbo->CurrentSize; + /* + if (framelen > IPG_RXFRAG_SIZE) + framelen=IPG_RXFRAG_SIZE; + */ + if (framelen > IPG_RXSUPPORT_SIZE) + IPG_DEV_KFREE_SKB(jumbo->skb); + else { + memcpy(skb_put(jumbo->skb, endframeLen), + skb->data, endframeLen); + + jumbo->skb->protocol = + eth_type_trans(jumbo->skb, dev); + + jumbo->skb->ip_summed = CHECKSUM_NONE; + netif_rx(jumbo->skb); + } + } + + dev->last_rx = jiffies; + jumbo->FoundStart = 0; + jumbo->CurrentSize = 0; + jumbo->skb = NULL; + + ipg_nic_rx_free_skb(dev); + } else { + IPG_DEV_KFREE_SKB(jumbo->skb); + jumbo->FoundStart = 0; + jumbo->CurrentSize = 0; + jumbo->skb = NULL; + } +} + +static void ipg_nic_rx_no_start_no_end(struct net_device *dev, + struct ipg_nic_private *sp, + struct ipg_rx *rxfd, unsigned entry) +{ + struct SJumbo *jumbo = &sp->Jumbo; + + //1: found error, 0 no error + if (ipg_nic_rx_check_error(dev) == NormalPacket) { + struct sk_buff *skb = sp->RxBuff[entry]; + + if (skb) { + if (jumbo->FoundStart) { + jumbo->CurrentSize += IPG_RXFRAG_SIZE; + if (jumbo->CurrentSize <= IPG_RXSUPPORT_SIZE) { + memcpy(skb_put(jumbo->skb, + IPG_RXFRAG_SIZE), + skb->data, IPG_RXFRAG_SIZE); + } + } + dev->last_rx = jiffies; + ipg_nic_rx_free_skb(dev); + } + } else { + IPG_DEV_KFREE_SKB(jumbo->skb); + jumbo->FoundStart = 0; + jumbo->CurrentSize = 0; + jumbo->skb = NULL; + } +} + +static int ipg_nic_rx(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + unsigned int curr = sp->rx_current; + void __iomem *ioaddr = sp->ioaddr; + unsigned int i; + + IPG_DEBUG_MSG("_nic_rx\n"); + + for (i = 0; i < IPG_MAXRFDPROCESS_COUNT; i++, curr++) { + unsigned int entry = curr % IPG_RFDLIST_LENGTH; + struct ipg_rx *rxfd = sp->rxd + entry; + + if (!(rxfd->rfs & le64_to_cpu(IPG_RFS_RFDDONE))) + break; + + switch (ipg_nic_rx_check_frame_type(dev)) { + case Frame_WithStart_WithEnd: + ipg_nic_rx_with_start_and_end(dev, tp, rxfd, entry); + break; + case Frame_WithStart: + ipg_nic_rx_with_start(dev, tp, rxfd, entry); + break; + case Frame_WithEnd: + ipg_nic_rx_with_end(dev, tp, rxfd, entry); + break; + case Frame_NoStart_NoEnd: + ipg_nic_rx_no_start_no_end(dev, tp, rxfd, entry); + break; + } + } + + sp->rx_current = curr; + + if (i == IPG_MAXRFDPROCESS_COUNT) { + /* There are more RFDs to process, however the + * allocated amount of RFD processing time has + * expired. Assert Interrupt Requested to make + * sure we come back to process the remaining RFDs. + */ + ipg_w32(ipg_r32(ASIC_CTRL) | IPG_AC_INT_REQUEST, ASIC_CTRL); + } + + ipg_nic_rxrestore(dev); + + return 0; +} + +#else +static int ipg_nic_rx(struct net_device *dev) +{ + /* Transfer received Ethernet frames to higher network layers. */ + struct ipg_nic_private *sp = netdev_priv(dev); + unsigned int curr = sp->rx_current; + void __iomem *ioaddr = sp->ioaddr; + struct ipg_rx *rxfd; + unsigned int i; + + IPG_DEBUG_MSG("_nic_rx\n"); + +#define __RFS_MASK \ + cpu_to_le64(IPG_RFS_RFDDONE | IPG_RFS_FRAMESTART | IPG_RFS_FRAMEEND) + + for (i = 0; i < IPG_MAXRFDPROCESS_COUNT; i++, curr++) { + unsigned int entry = curr % IPG_RFDLIST_LENGTH; + struct sk_buff *skb = sp->RxBuff[entry]; + unsigned int framelen; + + rxfd = sp->rxd + entry; + + if (((rxfd->rfs & __RFS_MASK) != __RFS_MASK) || !skb) + break; + + /* Get received frame length. */ + framelen = le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFRAMELEN; + + /* Check for jumbo frame arrival with too small + * RXFRAG_SIZE. + */ + if (framelen > IPG_RXFRAG_SIZE) { + IPG_DEBUG_MSG + ("RFS FrameLen > allocated fragment size.\n"); + + framelen = IPG_RXFRAG_SIZE; + } + + if ((IPG_DROP_ON_RX_ETH_ERRORS && (le64_to_cpu(rxfd->rfs & + (IPG_RFS_RXFIFOOVERRUN | IPG_RFS_RXRUNTFRAME | + IPG_RFS_RXALIGNMENTERROR | IPG_RFS_RXFCSERROR | + IPG_RFS_RXOVERSIZEDFRAME | IPG_RFS_RXLENGTHERROR))))) { + + IPG_DEBUG_MSG("Rx error, RFS = %16.16lx\n", + (unsigned long int) rxfd->rfs); + + /* Increment general receive error statistic. */ + sp->stats.rx_errors++; + + /* Increment detailed receive error statistics. */ + if (le64_to_cpu(rxfd->rfs & IPG_RFS_RXFIFOOVERRUN)) { + IPG_DEBUG_MSG("RX FIFO overrun occured.\n"); + sp->stats.rx_fifo_errors++; + } + + if (le64_to_cpu(rxfd->rfs & IPG_RFS_RXRUNTFRAME)) { + IPG_DEBUG_MSG("RX runt occured.\n"); + sp->stats.rx_length_errors++; + } + + if (le64_to_cpu(rxfd->rfs & IPG_RFS_RXOVERSIZEDFRAME)) ; + /* Do nothing, error count handled by a IPG + * statistic register. + */ + + if (le64_to_cpu(rxfd->rfs & IPG_RFS_RXALIGNMENTERROR)) { + IPG_DEBUG_MSG("RX alignment error occured.\n"); + sp->stats.rx_frame_errors++; + } + + if (le64_to_cpu(rxfd->rfs & IPG_RFS_RXFCSERROR)) ; + /* Do nothing, error count handled by a IPG + * statistic register. + */ + + /* Free the memory associated with the RX + * buffer since it is erroneous and we will + * not pass it to higher layer processes. + */ + if (skb) { + u64 info = rxfd->frag_info; + + pci_unmap_single(sp->pdev, + le64_to_cpu(info & ~IPG_RFI_FRAGLEN), + sp->rx_buf_sz, PCI_DMA_FROMDEVICE); + + IPG_DEV_KFREE_SKB(skb); + } + } else { + + /* Adjust the new buffer length to accomodate the size + * of the received frame. + */ + skb_put(skb, framelen); + + /* Set the buffer's protocol field to Ethernet. */ + skb->protocol = eth_type_trans(skb, dev); + + /* If the frame contains an IP/TCP/UDP frame, + * determine if upper layer must check IP/TCP/UDP + * checksums. + * + * NOTE: DO NOT RELY ON THE TCP/UDP CHECKSUM + * VERIFICATION FOR SILICON REVISIONS B3 + * AND EARLIER! + * + if ((le64_to_cpu(rxfd->rfs & + (IPG_RFS_TCPDETECTED | IPG_RFS_UDPDETECTED | + IPG_RFS_IPDETECTED))) && + !(le64_to_cpu(rxfd->rfs & + (IPG_RFS_TCPERROR | IPG_RFS_UDPERROR | + IPG_RFS_IPERROR)))) { + * Indicate IP checksums were performed + * by the IPG. + * + skb->ip_summed = CHECKSUM_UNNECESSARY; + } else + */ + { + /* The IPG encountered an error with (or + * there were no) IP/TCP/UDP checksums. + * This may or may not indicate an invalid + * IP/TCP/UDP frame was received. Let the + * upper layer decide. + */ + skb->ip_summed = CHECKSUM_NONE; + } + + /* Hand off frame for higher layer processing. + * The function netif_rx() releases the sk_buff + * when processing completes. + */ + netif_rx(skb); + + /* Record frame receive time (jiffies = Linux + * kernel current time stamp). + */ + dev->last_rx = jiffies; + } + + /* Assure RX buffer is not reused by IPG. */ + sp->RxBuff[entry] = NULL; + } + + /* + * If there are more RFDs to proces and the allocated amount of RFD + * processing time has expired, assert Interrupt Requested to make + * sure we come back to process the remaining RFDs. + */ + if (i == IPG_MAXRFDPROCESS_COUNT) + ipg_w32(ipg_r32(ASIC_CTRL) | IPG_AC_INT_REQUEST, ASIC_CTRL); + +#ifdef IPG_DEBUG + /* Check if the RFD list contained no receive frame data. */ + if (!i) + sp->EmptyRFDListCount++; +#endif + while ((le64_to_cpu(rxfd->rfs & IPG_RFS_RFDDONE)) && + !((le64_to_cpu(rxfd->rfs & IPG_RFS_FRAMESTART)) && + (le64_to_cpu(rxfd->rfs & IPG_RFS_FRAMEEND)))) { + unsigned int entry = curr++ % IPG_RFDLIST_LENGTH; + + rxfd = sp->rxd + entry; + + IPG_DEBUG_MSG("Frame requires multiple RFDs.\n"); + + /* An unexpected event, additional code needed to handle + * properly. So for the time being, just disregard the + * frame. + */ + + /* Free the memory associated with the RX + * buffer since it is erroneous and we will + * not pass it to higher layer processes. + */ + if (sp->RxBuff[entry]) { + pci_unmap_single(sp->pdev, + le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN), + sp->rx_buf_sz, PCI_DMA_FROMDEVICE); + IPG_DEV_KFREE_SKB(sp->RxBuff[entry]); + } + + /* Assure RX buffer is not reused by IPG. */ + sp->RxBuff[entry] = NULL; + } + + sp->rx_current = curr; + + /* Check to see if there are a minimum number of used + * RFDs before restoring any (should improve performance.) + */ + if ((curr - sp->rx_dirty) >= IPG_MINUSEDRFDSTOFREE) + ipg_nic_rxrestore(dev); + + return 0; +} +#endif + +static void ipg_reset_after_host_error(struct work_struct *work) +{ + struct ipg_nic_private *sp = + container_of(work, struct ipg_nic_private, task.work); + struct net_device *dev = sp->dev; + + IPG_DDEBUG_MSG("DMACtrl = %8.8x\n", ioread32(sp->ioaddr + IPG_DMACTRL)); + + /* + * Acknowledge HostError interrupt by resetting + * IPG DMA and HOST. + */ + ipg_reset(dev, IPG_AC_GLOBAL_RESET | IPG_AC_HOST | IPG_AC_DMA); + + init_rfdlist(dev); + init_tfdlist(dev); + + if (ipg_io_config(dev) < 0) { + printk(KERN_INFO "%s: Cannot recover from PCI error.\n", + dev->name); + schedule_delayed_work(&sp->task, HZ); + } +} + +static irqreturn_t ipg_interrupt_handler(int irq, void *dev_inst) +{ + struct net_device *dev = dev_inst; + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int handled = 0; + u16 status; + + IPG_DEBUG_MSG("_interrupt_handler\n"); + +#ifdef JUMBO_FRAME + ipg_nic_rxrestore(dev); +#endif + /* Get interrupt source information, and acknowledge + * some (i.e. TxDMAComplete, RxDMAComplete, RxEarly, + * IntRequested, MacControlFrame, LinkEvent) interrupts + * if issued. Also, all IPG interrupts are disabled by + * reading IntStatusAck. + */ + status = ipg_r16(INT_STATUS_ACK); + + IPG_DEBUG_MSG("IntStatusAck = %4.4x\n", status); + + /* Shared IRQ of remove event. */ + if (!(status & IPG_IS_RSVD_MASK)) + goto out_enable; + + handled = 1; + + if (unlikely(!netif_running(dev))) + goto out; + + spin_lock(&sp->lock); + + /* If RFDListEnd interrupt, restore all used RFDs. */ + if (status & IPG_IS_RFD_LIST_END) { + IPG_DEBUG_MSG("RFDListEnd Interrupt.\n"); + + /* The RFD list end indicates an RFD was encountered + * with a 0 NextPtr, or with an RFDDone bit set to 1 + * (indicating the RFD is not read for use by the + * IPG.) Try to restore all RFDs. + */ + ipg_nic_rxrestore(dev); + +#ifdef IPG_DEBUG + /* Increment the RFDlistendCount counter. */ + sp->RFDlistendCount++; +#endif + } + + /* If RFDListEnd, RxDMAPriority, RxDMAComplete, or + * IntRequested interrupt, process received frames. */ + if ((status & IPG_IS_RX_DMA_PRIORITY) || + (status & IPG_IS_RFD_LIST_END) || + (status & IPG_IS_RX_DMA_COMPLETE) || + (status & IPG_IS_INT_REQUESTED)) { +#ifdef IPG_DEBUG + /* Increment the RFD list checked counter if interrupted + * only to check the RFD list. */ + if (status & (~(IPG_IS_RX_DMA_PRIORITY | IPG_IS_RFD_LIST_END | + IPG_IS_RX_DMA_COMPLETE | IPG_IS_INT_REQUESTED) & + (IPG_IS_HOST_ERROR | IPG_IS_TX_DMA_COMPLETE | + IPG_IS_LINK_EVENT | IPG_IS_TX_COMPLETE | + IPG_IS_UPDATE_STATS))) + sp->RFDListCheckedCount++; +#endif + + ipg_nic_rx(dev); + } + + /* If TxDMAComplete interrupt, free used TFDs. */ + if (status & IPG_IS_TX_DMA_COMPLETE) + ipg_nic_txfree(dev); + + /* TxComplete interrupts indicate one of numerous actions. + * Determine what action to take based on TXSTATUS register. + */ + if (status & IPG_IS_TX_COMPLETE) + ipg_nic_txcleanup(dev); + + /* If UpdateStats interrupt, update Linux Ethernet statistics */ + if (status & IPG_IS_UPDATE_STATS) + ipg_nic_get_stats(dev); + + /* If HostError interrupt, reset IPG. */ + if (status & IPG_IS_HOST_ERROR) { + IPG_DDEBUG_MSG("HostError Interrupt\n"); + + schedule_delayed_work(&sp->task, 0); + } + + /* If LinkEvent interrupt, resolve autonegotiation. */ + if (status & IPG_IS_LINK_EVENT) { + if (ipg_config_autoneg(dev) < 0) + printk(KERN_INFO "%s: Auto-negotiation error.\n", + dev->name); + } + + /* If MACCtrlFrame interrupt, do nothing. */ + if (status & IPG_IS_MAC_CTRL_FRAME) + IPG_DEBUG_MSG("MACCtrlFrame interrupt.\n"); + + /* If RxComplete interrupt, do nothing. */ + if (status & IPG_IS_RX_COMPLETE) + IPG_DEBUG_MSG("RxComplete interrupt.\n"); + + /* If RxEarly interrupt, do nothing. */ + if (status & IPG_IS_RX_EARLY) + IPG_DEBUG_MSG("RxEarly interrupt.\n"); + +out_enable: + /* Re-enable IPG interrupts. */ + ipg_w16(IPG_IE_TX_DMA_COMPLETE | IPG_IE_RX_DMA_COMPLETE | + IPG_IE_HOST_ERROR | IPG_IE_INT_REQUESTED | IPG_IE_TX_COMPLETE | + IPG_IE_LINK_EVENT | IPG_IE_UPDATE_STATS, INT_ENABLE); + + spin_unlock(&sp->lock); +out: + return IRQ_RETVAL(handled); +} + +static void ipg_rx_clear(struct ipg_nic_private *sp) +{ + unsigned int i; + + for (i = 0; i < IPG_RFDLIST_LENGTH; i++) { + if (sp->RxBuff[i]) { + struct ipg_rx *rxfd = sp->rxd + i; + + IPG_DEV_KFREE_SKB(sp->RxBuff[i]); + sp->RxBuff[i] = NULL; + pci_unmap_single(sp->pdev, + le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN), + sp->rx_buf_sz, PCI_DMA_FROMDEVICE); + } + } +} + +static void ipg_tx_clear(struct ipg_nic_private *sp) +{ + unsigned int i; + + for (i = 0; i < IPG_TFDLIST_LENGTH; i++) { + if (sp->TxBuff[i]) { + struct ipg_tx *txfd = sp->txd + i; + + pci_unmap_single(sp->pdev, + le64_to_cpu(txfd->frag_info & ~IPG_TFI_FRAGLEN), + sp->TxBuff[i]->len, PCI_DMA_TODEVICE); + + IPG_DEV_KFREE_SKB(sp->TxBuff[i]); + + sp->TxBuff[i] = NULL; + } + } +} + +static int ipg_nic_open(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + struct pci_dev *pdev = sp->pdev; + int rc; + + IPG_DEBUG_MSG("_nic_open\n"); + + sp->rx_buf_sz = IPG_RXSUPPORT_SIZE; + + /* Check for interrupt line conflicts, and request interrupt + * line for IPG. + * + * IMPORTANT: Disable IPG interrupts prior to registering + * IRQ. + */ + ipg_w16(0x0000, INT_ENABLE); + + /* Register the interrupt line to be used by the IPG within + * the Linux system. + */ + rc = request_irq(pdev->irq, &ipg_interrupt_handler, IRQF_SHARED, + dev->name, dev); + if (rc < 0) { + printk(KERN_INFO "%s: Error when requesting interrupt.\n", + dev->name); + goto out; + } + + dev->irq = pdev->irq; + + rc = -ENOMEM; + + sp->rxd = dma_alloc_coherent(&pdev->dev, IPG_RX_RING_BYTES, + &sp->rxd_map, GFP_KERNEL); + if (!sp->rxd) + goto err_free_irq_0; + + sp->txd = dma_alloc_coherent(&pdev->dev, IPG_TX_RING_BYTES, + &sp->txd_map, GFP_KERNEL); + if (!sp->txd) + goto err_free_rx_1; + + rc = init_rfdlist(dev); + if (rc < 0) { + printk(KERN_INFO "%s: Error during configuration.\n", + dev->name); + goto err_free_tx_2; + } + + init_tfdlist(dev); + + rc = ipg_io_config(dev); + if (rc < 0) { + printk(KERN_INFO "%s: Error during configuration.\n", + dev->name); + goto err_release_tfdlist_3; + } + + /* Resolve autonegotiation. */ + if (ipg_config_autoneg(dev) < 0) + printk(KERN_INFO "%s: Auto-negotiation error.\n", dev->name); + +#ifdef JUMBO_FRAME + /* initialize JUMBO Frame control variable */ + sp->Jumbo.FoundStart = 0; + sp->Jumbo.CurrentSize = 0; + sp->Jumbo.skb = 0; + dev->mtu = IPG_TXFRAG_SIZE; +#endif + + /* Enable transmit and receive operation of the IPG. */ + ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_RX_ENABLE | IPG_MC_TX_ENABLE) & + IPG_MC_RSVD_MASK, MAC_CTRL); + + netif_start_queue(dev); +out: + return rc; + +err_release_tfdlist_3: + ipg_tx_clear(sp); + ipg_rx_clear(sp); +err_free_tx_2: + dma_free_coherent(&pdev->dev, IPG_TX_RING_BYTES, sp->txd, sp->txd_map); +err_free_rx_1: + dma_free_coherent(&pdev->dev, IPG_RX_RING_BYTES, sp->rxd, sp->rxd_map); +err_free_irq_0: + free_irq(pdev->irq, dev); + goto out; +} + +static int ipg_nic_stop(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + struct pci_dev *pdev = sp->pdev; + + IPG_DEBUG_MSG("_nic_stop\n"); + + netif_stop_queue(dev); + + IPG_DDEBUG_MSG("RFDlistendCount = %i\n", sp->RFDlistendCount); + IPG_DDEBUG_MSG("RFDListCheckedCount = %i\n", sp->rxdCheckedCount); + IPG_DDEBUG_MSG("EmptyRFDListCount = %i\n", sp->EmptyRFDListCount); + IPG_DUMPTFDLIST(dev); + + do { + (void) ipg_r16(INT_STATUS_ACK); + + ipg_reset(dev, IPG_AC_GLOBAL_RESET | IPG_AC_HOST | IPG_AC_DMA); + + synchronize_irq(pdev->irq); + } while (ipg_r16(INT_ENABLE) & IPG_IE_RSVD_MASK); + + ipg_rx_clear(sp); + + ipg_tx_clear(sp); + + pci_free_consistent(pdev, IPG_RX_RING_BYTES, sp->rxd, sp->rxd_map); + pci_free_consistent(pdev, IPG_TX_RING_BYTES, sp->txd, sp->txd_map); + + free_irq(pdev->irq, dev); + + return 0; +} + +static int ipg_nic_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int entry = sp->tx_current % IPG_TFDLIST_LENGTH; + unsigned long flags; + struct ipg_tx *txfd; + + IPG_DDEBUG_MSG("_nic_hard_start_xmit\n"); + + /* If in 10Mbps mode, stop the transmit queue so + * no more transmit frames are accepted. + */ + if (sp->tenmbpsmode) + netif_stop_queue(dev); + + if (sp->ResetCurrentTFD) { + sp->ResetCurrentTFD = 0; + entry = 0; + } + + txfd = sp->txd + entry; + + sp->TxBuff[entry] = skb; + + /* Clear all TFC fields, except TFDDONE. */ + txfd->tfc = cpu_to_le64(IPG_TFC_TFDDONE); + + /* Specify the TFC field within the TFD. */ + txfd->tfc |= cpu_to_le64(IPG_TFC_WORDALIGNDISABLED | + (IPG_TFC_FRAMEID & cpu_to_le64(sp->tx_current)) | + (IPG_TFC_FRAGCOUNT & (1 << 24))); + + /* Request TxComplete interrupts at an interval defined + * by the constant IPG_FRAMESBETWEENTXCOMPLETES. + * Request TxComplete interrupt for every frame + * if in 10Mbps mode to accomodate problem with 10Mbps + * processing. + */ + if (sp->tenmbpsmode) + txfd->tfc |= cpu_to_le64(IPG_TFC_TXINDICATE); + else if (!((sp->tx_current - sp->tx_dirty + 1) > + IPG_FRAMESBETWEENTXDMACOMPLETES)) { + txfd->tfc |= cpu_to_le64(IPG_TFC_TXDMAINDICATE); + } + /* Based on compilation option, determine if FCS is to be + * appended to transmit frame by IPG. + */ + if (!(IPG_APPEND_FCS_ON_TX)) + txfd->tfc |= cpu_to_le64(IPG_TFC_FCSAPPENDDISABLE); + + /* Based on compilation option, determine if IP, TCP and/or + * UDP checksums are to be added to transmit frame by IPG. + */ + if (IPG_ADD_IPCHECKSUM_ON_TX) + txfd->tfc |= cpu_to_le64(IPG_TFC_IPCHECKSUMENABLE); + + if (IPG_ADD_TCPCHECKSUM_ON_TX) + txfd->tfc |= cpu_to_le64(IPG_TFC_TCPCHECKSUMENABLE); + + if (IPG_ADD_UDPCHECKSUM_ON_TX) + txfd->tfc |= cpu_to_le64(IPG_TFC_UDPCHECKSUMENABLE); + + /* Based on compilation option, determine if VLAN tag info is to be + * inserted into transmit frame by IPG. + */ + if (IPG_INSERT_MANUAL_VLAN_TAG) { + txfd->tfc |= cpu_to_le64(IPG_TFC_VLANTAGINSERT | + ((u64) IPG_MANUAL_VLAN_VID << 32) | + ((u64) IPG_MANUAL_VLAN_CFI << 44) | + ((u64) IPG_MANUAL_VLAN_USERPRIORITY << 45)); + } + + /* The fragment start location within system memory is defined + * by the sk_buff structure's data field. The physical address + * of this location within the system's virtual memory space + * is determined using the IPG_HOST2BUS_MAP function. + */ + txfd->frag_info = cpu_to_le64(pci_map_single(sp->pdev, skb->data, + skb->len, PCI_DMA_TODEVICE)); + + /* The length of the fragment within system memory is defined by + * the sk_buff structure's len field. + */ + txfd->frag_info |= cpu_to_le64(IPG_TFI_FRAGLEN & + ((u64) (skb->len & 0xffff) << 48)); + + /* Clear the TFDDone bit last to indicate the TFD is ready + * for transfer to the IPG. + */ + txfd->tfc &= cpu_to_le64(~IPG_TFC_TFDDONE); + + spin_lock_irqsave(&sp->lock, flags); + + sp->tx_current++; + + mmiowb(); + + ipg_w32(IPG_DC_TX_DMA_POLL_NOW, DMA_CTRL); + + if (sp->tx_current == (sp->tx_dirty + IPG_TFDLIST_LENGTH)) + netif_wake_queue(dev); + + spin_unlock_irqrestore(&sp->lock, flags); + + return NETDEV_TX_OK; +} + +static void ipg_set_phy_default_param(unsigned char rev, + struct net_device *dev, int phy_address) +{ + unsigned short length; + unsigned char revision; + unsigned short *phy_param; + unsigned short address, value; + + phy_param = &DefaultPhyParam[0]; + length = *phy_param & 0x00FF; + revision = (unsigned char)((*phy_param) >> 8); + phy_param++; + while (length != 0) { + if (rev == revision) { + while (length > 1) { + address = *phy_param; + value = *(phy_param + 1); + phy_param += 2; + mdio_write(dev, phy_address, address, value); + length -= 4; + } + break; + } else { + phy_param += length / 2; + length = *phy_param & 0x00FF; + revision = (unsigned char)((*phy_param) >> 8); + phy_param++; + } + } +} + +/* JES20040127EEPROM */ +static int read_eeprom(struct net_device *dev, int eep_addr) +{ + void __iomem *ioaddr = ipg_ioaddr(dev); + unsigned int i; + int ret = 0; + u16 value; + + value = IPG_EC_EEPROM_READOPCODE | (eep_addr & 0xff); + ipg_w16(value, EEPROM_CTRL); + + for (i = 0; i < 1000; i++) { + u16 data; + + mdelay(10); + data = ipg_r16(EEPROM_CTRL); + if (!(data & IPG_EC_EEPROM_BUSY)) { + ret = ipg_r16(EEPROM_DATA); + break; + } + } + return ret; +} + +static void ipg_init_mii(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + struct mii_if_info *mii_if = &sp->mii_if; + int phyaddr; + + mii_if->dev = dev; + mii_if->mdio_read = mdio_read; + mii_if->mdio_write = mdio_write; + mii_if->phy_id_mask = 0x1f; + mii_if->reg_num_mask = 0x1f; + + mii_if->phy_id = phyaddr = ipg_find_phyaddr(dev); + + if (phyaddr != 0x1f) { + u16 mii_phyctrl, mii_1000cr; + u8 revisionid = 0; + + mii_1000cr = mdio_read(dev, phyaddr, MII_CTRL1000); + mii_1000cr |= ADVERTISE_1000FULL | ADVERTISE_1000HALF | + GMII_PHY_1000BASETCONTROL_PreferMaster; + mdio_write(dev, phyaddr, MII_CTRL1000, mii_1000cr); + + mii_phyctrl = mdio_read(dev, phyaddr, MII_BMCR); + + /* Set default phyparam */ + pci_read_config_byte(sp->pdev, PCI_REVISION_ID, &revisionid); + ipg_set_phy_default_param(revisionid, dev, phyaddr); + + /* Reset PHY */ + mii_phyctrl |= BMCR_RESET | BMCR_ANRESTART; + mdio_write(dev, phyaddr, MII_BMCR, mii_phyctrl); + + } +} + +static int ipg_hw_init(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + void __iomem *ioaddr = sp->ioaddr; + unsigned int i; + int rc; + + /* Read/Write and Reset EEPROM Value Jesse20040128EEPROM_VALUE */ + /* Read LED Mode Configuration from EEPROM */ + sp->LED_Mode = read_eeprom(dev, 6); + + /* Reset all functions within the IPG. Do not assert + * RST_OUT as not compatible with some PHYs. + */ + rc = ipg_reset(dev, IPG_RESET_MASK); + if (rc < 0) + goto out; + + ipg_init_mii(dev); + + /* Read MAC Address from EEPROM */ + for (i = 0; i < 3; i++) + sp->station_addr[i] = read_eeprom(dev, 16 + i); + + for (i = 0; i < 3; i++) + ipg_w16(sp->station_addr[i], STATION_ADDRESS_0 + 2*i); + + /* Set station address in ethernet_device structure. */ + dev->dev_addr[0] = ipg_r16(STATION_ADDRESS_0) & 0x00ff; + dev->dev_addr[1] = (ipg_r16(STATION_ADDRESS_0) & 0xff00) >> 8; + dev->dev_addr[2] = ipg_r16(STATION_ADDRESS_1) & 0x00ff; + dev->dev_addr[3] = (ipg_r16(STATION_ADDRESS_1) & 0xff00) >> 8; + dev->dev_addr[4] = ipg_r16(STATION_ADDRESS_2) & 0x00ff; + dev->dev_addr[5] = (ipg_r16(STATION_ADDRESS_2) & 0xff00) >> 8; +out: + return rc; +} + +static int ipg_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + int rc; + + mutex_lock(&sp->mii_mutex); + rc = generic_mii_ioctl(&sp->mii_if, if_mii(ifr), cmd, NULL); + mutex_unlock(&sp->mii_mutex); + + return rc; +} + +static int ipg_nic_change_mtu(struct net_device *dev, int new_mtu) +{ + /* Function to accomodate changes to Maximum Transfer Unit + * (or MTU) of IPG NIC. Cannot use default function since + * the default will not allow for MTU > 1500 bytes. + */ + + IPG_DEBUG_MSG("_nic_change_mtu\n"); + + /* Check that the new MTU value is between 68 (14 byte header, 46 + * byte payload, 4 byte FCS) and IPG_MAX_RXFRAME_SIZE, which + * corresponds to the MAXFRAMESIZE register in the IPG. + */ + if ((new_mtu < 68) || (new_mtu > IPG_MAX_RXFRAME_SIZE)) + return -EINVAL; + + dev->mtu = new_mtu; + + return 0; +} + +static int ipg_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + int rc; + + mutex_lock(&sp->mii_mutex); + rc = mii_ethtool_gset(&sp->mii_if, cmd); + mutex_unlock(&sp->mii_mutex); + + return rc; +} + +static int ipg_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + int rc; + + mutex_lock(&sp->mii_mutex); + rc = mii_ethtool_sset(&sp->mii_if, cmd); + mutex_unlock(&sp->mii_mutex); + + return rc; +} + +static int ipg_nway_reset(struct net_device *dev) +{ + struct ipg_nic_private *sp = netdev_priv(dev); + int rc; + + mutex_lock(&sp->mii_mutex); + rc = mii_nway_restart(&sp->mii_if); + mutex_unlock(&sp->mii_mutex); + + return rc; +} + +static struct ethtool_ops ipg_ethtool_ops = { + .get_settings = ipg_get_settings, + .set_settings = ipg_set_settings, + .nway_reset = ipg_nway_reset, +}; + +static void ipg_remove(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct ipg_nic_private *sp = netdev_priv(dev); + + IPG_DEBUG_MSG("_remove\n"); + + /* Un-register Ethernet device. */ + unregister_netdev(dev); + + pci_iounmap(pdev, sp->ioaddr); + + pci_release_regions(pdev); + + free_netdev(dev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); +} + +static int __devinit ipg_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + unsigned int i = id->driver_data; + struct ipg_nic_private *sp; + struct net_device *dev; + void __iomem *ioaddr; + int rc; + + rc = pci_enable_device(pdev); + if (rc < 0) + goto out; + + printk(KERN_INFO "%s: %s\n", pci_name(pdev), ipg_brand_name[i]); + + pci_set_master(pdev); + + rc = pci_set_dma_mask(pdev, DMA_40BIT_MASK); + if (rc < 0) { + rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (rc < 0) { + printk(KERN_ERR "%s: DMA config failed.\n", + pci_name(pdev)); + goto err_disable_0; + } + } + + /* + * Initialize net device. + */ + dev = alloc_etherdev(sizeof(struct ipg_nic_private)); + if (!dev) { + printk(KERN_ERR "%s: alloc_etherdev failed\n", pci_name(pdev)); + rc = -ENOMEM; + goto err_disable_0; + } + + sp = netdev_priv(dev); + spin_lock_init(&sp->lock); + mutex_init(&sp->mii_mutex); + + /* Declare IPG NIC functions for Ethernet device methods. + */ + dev->open = &ipg_nic_open; + dev->stop = &ipg_nic_stop; + dev->hard_start_xmit = &ipg_nic_hard_start_xmit; + dev->get_stats = &ipg_nic_get_stats; + dev->set_multicast_list = &ipg_nic_set_multicast_list; + dev->do_ioctl = ipg_ioctl; + dev->tx_timeout = ipg_tx_timeout; + dev->change_mtu = &ipg_nic_change_mtu; + + SET_NETDEV_DEV(dev, &pdev->dev); + SET_ETHTOOL_OPS(dev, &ipg_ethtool_ops); + + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) + goto err_free_dev_1; + + ioaddr = pci_iomap(pdev, 1, pci_resource_len(pdev, 1)); + if (!ioaddr) { + printk(KERN_ERR "%s cannot map MMIO\n", pci_name(pdev)); + rc = -EIO; + goto err_release_regions_2; + } + + /* Save the pointer to the PCI device information. */ + sp->ioaddr = ioaddr; + sp->pdev = pdev; + sp->dev = dev; + + INIT_DELAYED_WORK(&sp->task, ipg_reset_after_host_error); + + pci_set_drvdata(pdev, dev); + + rc = ipg_hw_init(dev); + if (rc < 0) + goto err_unmap_3; + + rc = register_netdev(dev); + if (rc < 0) + goto err_unmap_3; + + printk(KERN_INFO "Ethernet device registered as: %s\n", dev->name); +out: + return rc; + +err_unmap_3: + pci_iounmap(pdev, ioaddr); +err_release_regions_2: + pci_release_regions(pdev); +err_free_dev_1: + free_netdev(dev); +err_disable_0: + pci_disable_device(pdev); + goto out; +} + +static struct pci_driver ipg_pci_driver = { + .name = IPG_DRIVER_NAME, + .id_table = ipg_pci_tbl, + .probe = ipg_probe, + .remove = __devexit_p(ipg_remove), +}; + +static int __init ipg_init_module(void) +{ + return pci_register_driver(&ipg_pci_driver); +} + +static void __exit ipg_exit_module(void) +{ + pci_unregister_driver(&ipg_pci_driver); +} + +module_init(ipg_init_module); +module_exit(ipg_exit_module); |