diff options
Diffstat (limited to 'drivers/net/sungem.c')
| -rw-r--r-- | drivers/net/sungem.c | 3202 |
1 files changed, 0 insertions, 3202 deletions
diff --git a/drivers/net/sungem.c b/drivers/net/sungem.c deleted file mode 100644 index 28ce47a0240..00000000000 --- a/drivers/net/sungem.c +++ /dev/null @@ -1,3202 +0,0 @@ -/* $Id: sungem.c,v 1.44.2.22 2002/03/13 01:18:12 davem Exp $ - * sungem.c: Sun GEM ethernet driver. - * - * Copyright (C) 2000, 2001, 2002, 2003 David S. Miller (davem@redhat.com) - * - * Support for Apple GMAC and assorted PHYs, WOL, Power Management - * (C) 2001,2002,2003 Benjamin Herrenscmidt (benh@kernel.crashing.org) - * (C) 2004,2005 Benjamin Herrenscmidt, IBM Corp. - * - * NAPI and NETPOLL support - * (C) 2004 by Eric Lemoine (eric.lemoine@gmail.com) - * - * TODO: - * - Now that the driver was significantly simplified, I need to rework - * the locking. I'm sure we don't need _2_ spinlocks, and we probably - * can avoid taking most of them for so long period of time (and schedule - * instead). The main issues at this point are caused by the netdev layer - * though: - * - * gem_change_mtu() and gem_set_multicast() are called with a read_lock() - * help by net/core/dev.c, thus they can't schedule. That means they can't - * call netif_poll_disable() neither, thus force gem_poll() to keep a spinlock - * where it could have been dropped. change_mtu especially would love also to - * be able to msleep instead of horrid locked delays when resetting the HW, - * but that read_lock() makes it impossible, unless I defer it's action to - * the reset task, which means it'll be asynchronous (won't take effect until - * the system schedules a bit). - * - * Also, it would probably be possible to also remove most of the long-life - * locking in open/resume code path (gem_reinit_chip) by beeing more careful - * about when we can start taking interrupts or get xmit() called... - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/fcntl.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/in.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/pci.h> -#include <linux/dma-mapping.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/mii.h> -#include <linux/ethtool.h> -#include <linux/crc32.h> -#include <linux/random.h> -#include <linux/workqueue.h> -#include <linux/if_vlan.h> -#include <linux/bitops.h> - -#include <asm/system.h> -#include <asm/io.h> -#include <asm/byteorder.h> -#include <asm/uaccess.h> -#include <asm/irq.h> - -#ifdef __sparc__ -#include <asm/idprom.h> -#include <asm/openprom.h> -#include <asm/oplib.h> -#include <asm/pbm.h> -#endif - -#ifdef CONFIG_PPC_PMAC -#include <asm/pci-bridge.h> -#include <asm/prom.h> -#include <asm/machdep.h> -#include <asm/pmac_feature.h> -#endif - -#include "sungem_phy.h" -#include "sungem.h" - -/* Stripping FCS is causing problems, disabled for now */ -#undef STRIP_FCS - -#define DEFAULT_MSG (NETIF_MSG_DRV | \ - NETIF_MSG_PROBE | \ - NETIF_MSG_LINK) - -#define ADVERTISE_MASK (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | \ - SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | \ - SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full) - -#define DRV_NAME "sungem" -#define DRV_VERSION "0.98" -#define DRV_RELDATE "8/24/03" -#define DRV_AUTHOR "David S. Miller (davem@redhat.com)" - -static char version[] __devinitdata = - DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n"; - -MODULE_AUTHOR(DRV_AUTHOR); -MODULE_DESCRIPTION("Sun GEM Gbit ethernet driver"); -MODULE_LICENSE("GPL"); - -#define GEM_MODULE_NAME "gem" -#define PFX GEM_MODULE_NAME ": " - -static struct pci_device_id gem_pci_tbl[] = { - { PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_GEM, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - - /* These models only differ from the original GEM in - * that their tx/rx fifos are of a different size and - * they only support 10/100 speeds. -DaveM - * - * Apple's GMAC does support gigabit on machines with - * the BCM54xx PHYs. -BenH - */ - { PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_RIO_GEM, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMACP, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC2, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_K2_GMAC, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_SH_SUNGEM, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_IPID2_GMAC, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - {0, } -}; - -MODULE_DEVICE_TABLE(pci, gem_pci_tbl); - -static u16 __phy_read(struct gem *gp, int phy_addr, int reg) -{ - u32 cmd; - int limit = 10000; - - cmd = (1 << 30); - cmd |= (2 << 28); - cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD; - cmd |= (reg << 18) & MIF_FRAME_REGAD; - cmd |= (MIF_FRAME_TAMSB); - writel(cmd, gp->regs + MIF_FRAME); - - while (limit--) { - cmd = readl(gp->regs + MIF_FRAME); - if (cmd & MIF_FRAME_TALSB) - break; - - udelay(10); - } - - if (!limit) - cmd = 0xffff; - - return cmd & MIF_FRAME_DATA; -} - -static inline int _phy_read(struct net_device *dev, int mii_id, int reg) -{ - struct gem *gp = dev->priv; - return __phy_read(gp, mii_id, reg); -} - -static inline u16 phy_read(struct gem *gp, int reg) -{ - return __phy_read(gp, gp->mii_phy_addr, reg); -} - -static void __phy_write(struct gem *gp, int phy_addr, int reg, u16 val) -{ - u32 cmd; - int limit = 10000; - - cmd = (1 << 30); - cmd |= (1 << 28); - cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD; - cmd |= (reg << 18) & MIF_FRAME_REGAD; - cmd |= (MIF_FRAME_TAMSB); - cmd |= (val & MIF_FRAME_DATA); - writel(cmd, gp->regs + MIF_FRAME); - - while (limit--) { - cmd = readl(gp->regs + MIF_FRAME); - if (cmd & MIF_FRAME_TALSB) - break; - - udelay(10); - } -} - -static inline void _phy_write(struct net_device *dev, int mii_id, int reg, int val) -{ - struct gem *gp = dev->priv; - __phy_write(gp, mii_id, reg, val & 0xffff); -} - -static inline void phy_write(struct gem *gp, int reg, u16 val) -{ - __phy_write(gp, gp->mii_phy_addr, reg, val); -} - -static inline void gem_enable_ints(struct gem *gp) -{ - /* Enable all interrupts but TXDONE */ - writel(GREG_STAT_TXDONE, gp->regs + GREG_IMASK); -} - -static inline void gem_disable_ints(struct gem *gp) -{ - /* Disable all interrupts, including TXDONE */ - writel(GREG_STAT_NAPI | GREG_STAT_TXDONE, gp->regs + GREG_IMASK); -} - -static void gem_get_cell(struct gem *gp) -{ - BUG_ON(gp->cell_enabled < 0); - gp->cell_enabled++; -#ifdef CONFIG_PPC_PMAC - if (gp->cell_enabled == 1) { - mb(); - pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 1); - udelay(10); - } -#endif /* CONFIG_PPC_PMAC */ -} - -/* Turn off the chip's clock */ -static void gem_put_cell(struct gem *gp) -{ - BUG_ON(gp->cell_enabled <= 0); - gp->cell_enabled--; -#ifdef CONFIG_PPC_PMAC - if (gp->cell_enabled == 0) { - mb(); - pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 0); - udelay(10); - } -#endif /* CONFIG_PPC_PMAC */ -} - -static void gem_handle_mif_event(struct gem *gp, u32 reg_val, u32 changed_bits) -{ - if (netif_msg_intr(gp)) - printk(KERN_DEBUG "%s: mif interrupt\n", gp->dev->name); -} - -static int gem_pcs_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) -{ - u32 pcs_istat = readl(gp->regs + PCS_ISTAT); - u32 pcs_miistat; - - if (netif_msg_intr(gp)) - printk(KERN_DEBUG "%s: pcs interrupt, pcs_istat: 0x%x\n", - gp->dev->name, pcs_istat); - - if (!(pcs_istat & PCS_ISTAT_LSC)) { - printk(KERN_ERR "%s: PCS irq but no link status change???\n", - dev->name); - return 0; - } - - /* The link status bit latches on zero, so you must - * read it twice in such a case to see a transition - * to the link being up. - */ - pcs_miistat = readl(gp->regs + PCS_MIISTAT); - if (!(pcs_miistat & PCS_MIISTAT_LS)) - pcs_miistat |= - (readl(gp->regs + PCS_MIISTAT) & - PCS_MIISTAT_LS); - - if (pcs_miistat & PCS_MIISTAT_ANC) { - /* The remote-fault indication is only valid - * when autoneg has completed. - */ - if (pcs_miistat & PCS_MIISTAT_RF) - printk(KERN_INFO "%s: PCS AutoNEG complete, " - "RemoteFault\n", dev->name); - else - printk(KERN_INFO "%s: PCS AutoNEG complete.\n", - dev->name); - } - - if (pcs_miistat & PCS_MIISTAT_LS) { - printk(KERN_INFO "%s: PCS link is now up.\n", - dev->name); - netif_carrier_on(gp->dev); - } else { - printk(KERN_INFO "%s: PCS link is now down.\n", - dev->name); - netif_carrier_off(gp->dev); - /* If this happens and the link timer is not running, - * reset so we re-negotiate. - */ - if (!timer_pending(&gp->link_timer)) - return 1; - } - - return 0; -} - -static int gem_txmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) -{ - u32 txmac_stat = readl(gp->regs + MAC_TXSTAT); - - if (netif_msg_intr(gp)) - printk(KERN_DEBUG "%s: txmac interrupt, txmac_stat: 0x%x\n", - gp->dev->name, txmac_stat); - - /* Defer timer expiration is quite normal, - * don't even log the event. - */ - if ((txmac_stat & MAC_TXSTAT_DTE) && - !(txmac_stat & ~MAC_TXSTAT_DTE)) - return 0; - - if (txmac_stat & MAC_TXSTAT_URUN) { - printk(KERN_ERR "%s: TX MAC xmit underrun.\n", - dev->name); - gp->net_stats.tx_fifo_errors++; - } - - if (txmac_stat & MAC_TXSTAT_MPE) { - printk(KERN_ERR "%s: TX MAC max packet size error.\n", - dev->name); - gp->net_stats.tx_errors++; - } - - /* The rest are all cases of one of the 16-bit TX - * counters expiring. - */ - if (txmac_stat & MAC_TXSTAT_NCE) - gp->net_stats.collisions += 0x10000; - - if (txmac_stat & MAC_TXSTAT_ECE) { - gp->net_stats.tx_aborted_errors += 0x10000; - gp->net_stats.collisions += 0x10000; - } - - if (txmac_stat & MAC_TXSTAT_LCE) { - gp->net_stats.tx_aborted_errors += 0x10000; - gp->net_stats.collisions += 0x10000; - } - - /* We do not keep track of MAC_TXSTAT_FCE and - * MAC_TXSTAT_PCE events. - */ - return 0; -} - -/* When we get a RX fifo overflow, the RX unit in GEM is probably hung - * so we do the following. - * - * If any part of the reset goes wrong, we return 1 and that causes the - * whole chip to be reset. - */ -static int gem_rxmac_reset(struct gem *gp) -{ - struct net_device *dev = gp->dev; - int limit, i; - u64 desc_dma; - u32 val; - - /* First, reset & disable MAC RX. */ - writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST); - for (limit = 0; limit < 5000; limit++) { - if (!(readl(gp->regs + MAC_RXRST) & MAC_RXRST_CMD)) - break; - udelay(10); - } - if (limit == 5000) { - printk(KERN_ERR "%s: RX MAC will not reset, resetting whole " - "chip.\n", dev->name); - return 1; - } - - writel(gp->mac_rx_cfg & ~MAC_RXCFG_ENAB, - gp->regs + MAC_RXCFG); - for (limit = 0; limit < 5000; limit++) { - if (!(readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB)) - break; - udelay(10); - } - if (limit == 5000) { - printk(KERN_ERR "%s: RX MAC will not disable, resetting whole " - "chip.\n", dev->name); - return 1; - } - - /* Second, disable RX DMA. */ - writel(0, gp->regs + RXDMA_CFG); - for (limit = 0; limit < 5000; limit++) { - if (!(readl(gp->regs + RXDMA_CFG) & RXDMA_CFG_ENABLE)) - break; - udelay(10); - } - if (limit == 5000) { - printk(KERN_ERR "%s: RX DMA will not disable, resetting whole " - "chip.\n", dev->name); - return 1; - } - - udelay(5000); - - /* Execute RX reset command. */ - writel(gp->swrst_base | GREG_SWRST_RXRST, - gp->regs + GREG_SWRST); - for (limit = 0; limit < 5000; limit++) { - if (!(readl(gp->regs + GREG_SWRST) & GREG_SWRST_RXRST)) - break; - udelay(10); - } - if (limit == 5000) { - printk(KERN_ERR "%s: RX reset command will not execute, resetting " - "whole chip.\n", dev->name); - return 1; - } - - /* Refresh the RX ring. */ - for (i = 0; i < RX_RING_SIZE; i++) { - struct gem_rxd *rxd = &gp->init_block->rxd[i]; - - if (gp->rx_skbs[i] == NULL) { - printk(KERN_ERR "%s: Parts of RX ring empty, resetting " - "whole chip.\n", dev->name); - return 1; - } - - rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); - } - gp->rx_new = gp->rx_old = 0; - - /* Now we must reprogram the rest of RX unit. */ - desc_dma = (u64) gp->gblock_dvma; - desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd)); - writel(desc_dma >> 32, gp->regs + RXDMA_DBHI); - writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW); - writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); - val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) | - ((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128); - writel(val, gp->regs + RXDMA_CFG); - if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN) - writel(((5 & RXDMA_BLANK_IPKTS) | - ((8 << 12) & RXDMA_BLANK_ITIME)), - gp->regs + RXDMA_BLANK); - else - writel(((5 & RXDMA_BLANK_IPKTS) | - ((4 << 12) & RXDMA_BLANK_ITIME)), - gp->regs + RXDMA_BLANK); - val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF); - val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON); - writel(val, gp->regs + RXDMA_PTHRESH); - val = readl(gp->regs + RXDMA_CFG); - writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); - writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK); - val = readl(gp->regs + MAC_RXCFG); - writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); - - return 0; -} - -static int gem_rxmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) -{ - u32 rxmac_stat = readl(gp->regs + MAC_RXSTAT); - int ret = 0; - - if (netif_msg_intr(gp)) - printk(KERN_DEBUG "%s: rxmac interrupt, rxmac_stat: 0x%x\n", - gp->dev->name, rxmac_stat); - - if (rxmac_stat & MAC_RXSTAT_OFLW) { - u32 smac = readl(gp->regs + MAC_SMACHINE); - - printk(KERN_ERR "%s: RX MAC fifo overflow smac[%08x].\n", - dev->name, smac); - gp->net_stats.rx_over_errors++; - gp->net_stats.rx_fifo_errors++; - - ret = gem_rxmac_reset(gp); - } - - if (rxmac_stat & MAC_RXSTAT_ACE) - gp->net_stats.rx_frame_errors += 0x10000; - - if (rxmac_stat & MAC_RXSTAT_CCE) - gp->net_stats.rx_crc_errors += 0x10000; - - if (rxmac_stat & MAC_RXSTAT_LCE) - gp->net_stats.rx_length_errors += 0x10000; - - /* We do not track MAC_RXSTAT_FCE and MAC_RXSTAT_VCE - * events. - */ - return ret; -} - -static int gem_mac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) -{ - u32 mac_cstat = readl(gp->regs + MAC_CSTAT); - - if (netif_msg_intr(gp)) - printk(KERN_DEBUG "%s: mac interrupt, mac_cstat: 0x%x\n", - gp->dev->name, mac_cstat); - - /* This interrupt is just for pause frame and pause - * tracking. It is useful for diagnostics and debug - * but probably by default we will mask these events. - */ - if (mac_cstat & MAC_CSTAT_PS) - gp->pause_entered++; - - if (mac_cstat & MAC_CSTAT_PRCV) - gp->pause_last_time_recvd = (mac_cstat >> 16); - - return 0; -} - -static int gem_mif_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) -{ - u32 mif_status = readl(gp->regs + MIF_STATUS); - u32 reg_val, changed_bits; - - reg_val = (mif_status & MIF_STATUS_DATA) >> 16; - changed_bits = (mif_status & MIF_STATUS_STAT); - - gem_handle_mif_event(gp, reg_val, changed_bits); - - return 0; -} - -static int gem_pci_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) -{ - u32 pci_estat = readl(gp->regs + GREG_PCIESTAT); - - if (gp->pdev->vendor == PCI_VENDOR_ID_SUN && - gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) { - printk(KERN_ERR "%s: PCI error [%04x] ", - dev->name, pci_estat); - - if (pci_estat & GREG_PCIESTAT_BADACK) - printk("<No ACK64# during ABS64 cycle> "); - if (pci_estat & GREG_PCIESTAT_DTRTO) - printk("<Delayed transaction timeout> "); - if (pci_estat & GREG_PCIESTAT_OTHER) - printk("<other>"); - printk("\n"); - } else { - pci_estat |= GREG_PCIESTAT_OTHER; - printk(KERN_ERR "%s: PCI error\n", dev->name); - } - - if (pci_estat & GREG_PCIESTAT_OTHER) { - u16 pci_cfg_stat; - - /* Interrogate PCI config space for the - * true cause. - */ - pci_read_config_word(gp->pdev, PCI_STATUS, - &pci_cfg_stat); - printk(KERN_ERR "%s: Read PCI cfg space status [%04x]\n", - dev->name, pci_cfg_stat); - if (pci_cfg_stat & PCI_STATUS_PARITY) - printk(KERN_ERR "%s: PCI parity error detected.\n", - dev->name); - if (pci_cfg_stat & PCI_STATUS_SIG_TARGET_ABORT) - printk(KERN_ERR "%s: PCI target abort.\n", - dev->name); - if (pci_cfg_stat & PCI_STATUS_REC_TARGET_ABORT) - printk(KERN_ERR "%s: PCI master acks target abort.\n", - dev->name); - if (pci_cfg_stat & PCI_STATUS_REC_MASTER_ABORT) - printk(KERN_ERR "%s: PCI master abort.\n", - dev->name); - if (pci_cfg_stat & PCI_STATUS_SIG_SYSTEM_ERROR) - printk(KERN_ERR "%s: PCI system error SERR#.\n", - dev->name); - if (pci_cfg_stat & PCI_STATUS_DETECTED_PARITY) - printk(KERN_ERR "%s: PCI parity error.\n", - dev->name); - - /* Write the error bits back to clear them. */ - pci_cfg_stat &= (PCI_STATUS_PARITY | - PCI_STATUS_SIG_TARGET_ABORT | - PCI_STATUS_REC_TARGET_ABORT | - PCI_STATUS_REC_MASTER_ABORT | - PCI_STATUS_SIG_SYSTEM_ERROR | - PCI_STATUS_DETECTED_PARITY); - pci_write_config_word(gp->pdev, - PCI_STATUS, pci_cfg_stat); - } - - /* For all PCI errors, we should reset the chip. */ - return 1; -} - -/* All non-normal interrupt conditions get serviced here. - * Returns non-zero if we should just exit the interrupt - * handler right now (ie. if we reset the card which invalidates - * all of the other original irq status bits). - */ -static int gem_abnormal_irq(struct net_device *dev, struct gem *gp, u32 gem_status) -{ - if (gem_status & GREG_STAT_RXNOBUF) { - /* Frame arrived, no free RX buffers available. */ - if (netif_msg_rx_err(gp)) - printk(KERN_DEBUG "%s: no buffer for rx frame\n", - gp->dev->name); - gp->net_stats.rx_dropped++; - } - - if (gem_status & GREG_STAT_RXTAGERR) { - /* corrupt RX tag framing */ - if (netif_msg_rx_err(gp)) - printk(KERN_DEBUG "%s: corrupt rx tag framing\n", - gp->dev->name); - gp->net_stats.rx_errors++; - - goto do_reset; - } - - if (gem_status & GREG_STAT_PCS) { - if (gem_pcs_interrupt(dev, gp, gem_status)) - goto do_reset; - } - - if (gem_status & GREG_STAT_TXMAC) { - if (gem_txmac_interrupt(dev, gp, gem_status)) - goto do_reset; - } - - if (gem_status & GREG_STAT_RXMAC) { - if (gem_rxmac_interrupt(dev, gp, gem_status)) - goto do_reset; - } - - if (gem_status & GREG_STAT_MAC) { - if (gem_mac_interrupt(dev, gp, gem_status)) - goto do_reset; - } - - if (gem_status & GREG_STAT_MIF) { - if (gem_mif_interrupt(dev, gp, gem_status)) - goto do_reset; - } - - if (gem_status & GREG_STAT_PCIERR) { - if (gem_pci_interrupt(dev, gp, gem_status)) - goto do_reset; - } - - return 0; - -do_reset: - gp->reset_task_pending = 1; - schedule_work(&gp->reset_task); - - return 1; -} - -static __inline__ void gem_tx(struct net_device *dev, struct gem *gp, u32 gem_status) -{ - int entry, limit; - - if (netif_msg_intr(gp)) - printk(KERN_DEBUG "%s: tx interrupt, gem_status: 0x%x\n", - gp->dev->name, gem_status); - - entry = gp->tx_old; - limit = ((gem_status & GREG_STAT_TXNR) >> GREG_STAT_TXNR_SHIFT); - while (entry != limit) { - struct sk_buff *skb; - struct gem_txd *txd; - dma_addr_t dma_addr; - u32 dma_len; - int frag; - - if (netif_msg_tx_done(gp)) - printk(KERN_DEBUG "%s: tx done, slot %d\n", - gp->dev->name, entry); - skb = gp->tx_skbs[entry]; - if (skb_shinfo(skb)->nr_frags) { - int last = entry + skb_shinfo(skb)->nr_frags; - int walk = entry; - int incomplete = 0; - - last &= (TX_RING_SIZE - 1); - for (;;) { - walk = NEXT_TX(walk); - if (walk == limit) - incomplete = 1; - if (walk == last) - break; - } - if (incomplete) - break; - } - gp->tx_skbs[entry] = NULL; - gp->net_stats.tx_bytes += skb->len; - - for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) { - txd = &gp->init_block->txd[entry]; - - dma_addr = le64_to_cpu(txd->buffer); - dma_len = le64_to_cpu(txd->control_word) & TXDCTRL_BUFSZ; - - pci_unmap_page(gp->pdev, dma_addr, dma_len, PCI_DMA_TODEVICE); - entry = NEXT_TX(entry); - } - - gp->net_stats.tx_packets++; - dev_kfree_skb_irq(skb); - } - gp->tx_old = entry; - - if (netif_queue_stopped(dev) && - TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1)) - netif_wake_queue(dev); -} - -static __inline__ void gem_post_rxds(struct gem *gp, int limit) -{ - int cluster_start, curr, count, kick; - - cluster_start = curr = (gp->rx_new & ~(4 - 1)); - count = 0; - kick = -1; - wmb(); - while (curr != limit) { - curr = NEXT_RX(curr); - if (++count == 4) { - struct gem_rxd *rxd = - &gp->init_block->rxd[cluster_start]; - for (;;) { - rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); - rxd++; - cluster_start = NEXT_RX(cluster_start); - if (cluster_start == curr) - break; - } - kick = curr; - count = 0; - } - } - if (kick >= 0) { - mb(); - writel(kick, gp->regs + RXDMA_KICK); - } -} - -static int gem_rx(struct gem *gp, int work_to_do) -{ - int entry, drops, work_done = 0; - u32 done; - - if (netif_msg_rx_status(gp)) - printk(KERN_DEBUG "%s: rx interrupt, done: %d, rx_new: %d\n", - gp->dev->name, readl(gp->regs + RXDMA_DONE), gp->rx_new); - - entry = gp->rx_new; - drops = 0; - done = readl(gp->regs + RXDMA_DONE); - for (;;) { - struct gem_rxd *rxd = &gp->init_block->rxd[entry]; - struct sk_buff *skb; - u64 status = cpu_to_le64(rxd->status_word); - dma_addr_t dma_addr; - int len; - - if ((status & RXDCTRL_OWN) != 0) - break; - - if (work_done >= RX_RING_SIZE || work_done >= work_to_do) - break; - - /* When writing back RX descriptor, GEM writes status - * then buffer address, possibly in seperate transactions. - * If we don't wait for the chip to write both, we could - * post a new buffer to this descriptor then have GEM spam - * on the buffer address. We sync on the RX completion - * register to prevent this from happening. - */ - if (entry == done) { - done = readl(gp->regs + RXDMA_DONE); - if (entry == done) - break; - } - - /* We can now account for the work we're about to do */ - work_done++; - - skb = gp->rx_skbs[entry]; - - len = (status & RXDCTRL_BUFSZ) >> 16; - if ((len < ETH_ZLEN) || (status & RXDCTRL_BAD)) { - gp->net_stats.rx_errors++; - if (len < ETH_ZLEN) - gp->net_stats.rx_length_errors++; - if (len & RXDCTRL_BAD) - gp->net_stats.rx_crc_errors++; - - /* We'll just return it to GEM. */ - drop_it: - gp->net_stats.rx_dropped++; - goto next; - } - - dma_addr = cpu_to_le64(rxd->buffer); - if (len > RX_COPY_THRESHOLD) { - struct sk_buff *new_skb; - - new_skb = gem_alloc_skb(RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC); - if (new_skb == NULL) { - drops++; - goto drop_it; - } - pci_unmap_page(gp->pdev, dma_addr, - RX_BUF_ALLOC_SIZE(gp), - PCI_DMA_FROMDEVICE); - gp->rx_skbs[entry] = new_skb; - new_skb->dev = gp->dev; - skb_put(new_skb, (gp->rx_buf_sz + RX_OFFSET)); - rxd->buffer = cpu_to_le64(pci_map_page(gp->pdev, - virt_to_page(new_skb->data), - offset_in_page(new_skb->data), - RX_BUF_ALLOC_SIZE(gp), - PCI_DMA_FROMDEVICE)); - skb_reserve(new_skb, RX_OFFSET); - - /* Trim the original skb for the netif. */ - skb_trim(skb, len); - } else { - struct sk_buff *copy_skb = dev_alloc_skb(len + 2); - - if (copy_skb == NULL) { - drops++; - goto drop_it; - } - - copy_skb->dev = gp->dev; - skb_reserve(copy_skb, 2); - skb_put(copy_skb, len); - pci_dma_sync_single_for_cpu(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE); - memcpy(copy_skb->data, skb->data, len); - pci_dma_sync_single_for_device(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE); - - /* We'll reuse the original ring buffer. */ - skb = copy_skb; - } - - skb->csum = ntohs((status & RXDCTRL_TCPCSUM) ^ 0xffff); - skb->ip_summed = CHECKSUM_HW; - skb->protocol = eth_type_trans(skb, gp->dev); - - netif_receive_skb(skb); - - gp->net_stats.rx_packets++; - gp->net_stats.rx_bytes += len; - gp->dev->last_rx = jiffies; - - next: - entry = NEXT_RX(entry); - } - - gem_post_rxds(gp, entry); - - gp->rx_new = entry; - - if (drops) - printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n", - gp->dev->name); - - return work_done; -} - -static int gem_poll(struct net_device *dev, int *budget) -{ - struct gem *gp = dev->priv; - unsigned long flags; - - /* - * NAPI locking nightmare: See comment at head of driver - */ - spin_lock_irqsave(&gp->lock, flags); - - do { - int work_to_do, work_done; - - /* Handle anomalies */ - if (gp->status & GREG_STAT_ABNORMAL) { - if (gem_abnormal_irq(dev, gp, gp->status)) - break; - } - - /* Run TX completion thread */ - spin_lock(&gp->tx_lock); - gem_tx(dev, gp, gp->status); - spin_unlock(&gp->tx_lock); - - spin_unlock_irqrestore(&gp->lock, flags); - - /* Run RX thread. We don't use any locking here, - * code willing to do bad things - like cleaning the - * rx ring - must call netif_poll_disable(), which - * schedule_timeout()'s if polling is already disabled. - */ - work_to_do = min(*budget, dev->quota); - - work_done = gem_rx(gp, work_to_do); - - *budget -= work_done; - dev->quota -= work_done; - - if (work_done >= work_to_do) - return 1; - - spin_lock_irqsave(&gp->lock, flags); - - gp->status = readl(gp->regs + GREG_STAT); - } while (gp->status & GREG_STAT_NAPI); - - __netif_rx_complete(dev); - gem_enable_ints(gp); - - spin_unlock_irqrestore(&gp->lock, flags); - return 0; -} - -static irqreturn_t gem_interrupt(int irq, void *dev_id, struct pt_regs *regs) -{ - struct net_device *dev = dev_id; - struct gem *gp = dev->priv; - unsigned long flags; - - /* Swallow interrupts when shutting the chip down, though - * that shouldn't happen, we should have done free_irq() at - * this point... - */ - if (!gp->running) - return IRQ_HANDLED; - - spin_lock_irqsave(&gp->lock, flags); - - if (netif_rx_schedule_prep(dev)) { - u32 gem_status = readl(gp->regs + GREG_STAT); - - if (gem_status == 0) { - netif_poll_enable(dev); - spin_unlock_irqrestore(&gp->lock, flags); - return IRQ_NONE; - } - gp->status = gem_status; - gem_disable_ints(gp); - __netif_rx_schedule(dev); - } - - spin_unlock_irqrestore(&gp->lock, flags); - - /* If polling was disabled at the time we received that - * interrupt, we may return IRQ_HANDLED here while we - * should return IRQ_NONE. No big deal... - */ - return IRQ_HANDLED; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -static void gem_poll_controller(struct net_device *dev) -{ - /* gem_interrupt is safe to reentrance so no need - * to disable_irq here. - */ - gem_interrupt(dev->irq, dev, NULL); -} -#endif - -static void gem_tx_timeout(struct net_device *dev) -{ - struct gem *gp = dev->priv; - - printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name); - if (!gp->running) { - printk("%s: hrm.. hw not running !\n", dev->name); - return; - } - printk(KERN_ERR "%s: TX_STATE[%08x:%08x:%08x]\n", - dev->name, - readl(gp->regs + TXDMA_CFG), - readl(gp->regs + MAC_TXSTAT), - readl(gp->regs + MAC_TXCFG)); - printk(KERN_ERR "%s: RX_STATE[%08x:%08x:%08x]\n", - dev->name, - readl(gp->regs + RXDMA_CFG), - readl(gp->regs + MAC_RXSTAT), - readl(gp->regs + MAC_RXCFG)); - - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - - gp->reset_task_pending = 1; - schedule_work(&gp->reset_task); - - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); -} - -static __inline__ int gem_intme(int entry) -{ - /* Algorithm: IRQ every 1/2 of descriptors. */ - if (!(entry & ((TX_RING_SIZE>>1)-1))) - return 1; - - return 0; -} - -static int gem_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct gem *gp = dev->priv; - int entry; - u64 ctrl; - unsigned long flags; - - ctrl = 0; - if (skb->ip_summed == CHECKSUM_HW) { - u64 csum_start_off, csum_stuff_off; - - csum_start_off = (u64) (skb->h.raw - skb->data); - csum_stuff_off = (u64) ((skb->h.raw + skb->csum) - skb->data); - - ctrl = (TXDCTRL_CENAB | - (csum_start_off << 15) | - (csum_stuff_off << 21)); - } - - local_irq_save(flags); - if (!spin_trylock(&gp->tx_lock)) { - /* Tell upper layer to requeue */ - local_irq_restore(flags); - return NETDEV_TX_LOCKED; - } - /* We raced with gem_do_stop() */ - if (!gp->running) { - spin_unlock_irqrestore(&gp->tx_lock, flags); - return NETDEV_TX_BUSY; - } - - /* This is a hard error, log it. */ - if (TX_BUFFS_AVAIL(gp) <= (skb_shinfo(skb)->nr_frags + 1)) { - netif_stop_queue(dev); - spin_unlock_irqrestore(&gp->tx_lock, flags); - printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n", - dev->name); - return NETDEV_TX_BUSY; - } - - entry = gp->tx_new; - gp->tx_skbs[entry] = skb; - - if (skb_shinfo(skb)->nr_frags == 0) { - struct gem_txd *txd = &gp->init_block->txd[entry]; - dma_addr_t mapping; - u32 len; - - len = skb->len; - mapping = pci_map_page(gp->pdev, - virt_to_page(skb->data), - offset_in_page(skb->data), - len, PCI_DMA_TODEVICE); - ctrl |= TXDCTRL_SOF | TXDCTRL_EOF | len; - if (gem_intme(entry)) - ctrl |= TXDCTRL_INTME; - txd->buffer = cpu_to_le64(mapping); - wmb(); - txd->control_word = cpu_to_le64(ctrl); - entry = NEXT_TX(entry); - } else { - struct gem_txd *txd; - u32 first_len; - u64 intme; - dma_addr_t first_mapping; - int frag, first_entry = entry; - - intme = 0; - if (gem_intme(entry)) - intme |= TXDCTRL_INTME; - - /* We must give this initial chunk to the device last. - * Otherwise we could race with the device. - */ - first_len = skb_headlen(skb); - first_mapping = pci_map_page(gp->pdev, virt_to_page(skb->data), - offset_in_page(skb->data), - first_len, PCI_DMA_TODEVICE); - 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; - dma_addr_t mapping; - u64 this_ctrl; - - len = this_frag->size; - mapping = pci_map_page(gp->pdev, - this_frag->page, - this_frag->page_offset, - len, PCI_DMA_TODEVICE); - this_ctrl = ctrl; - if (frag == skb_shinfo(skb)->nr_frags - 1) - this_ctrl |= TXDCTRL_EOF; - - txd = &gp->init_block->txd[entry]; - txd->buffer = cpu_to_le64(mapping); - wmb(); - txd->control_word = cpu_to_le64(this_ctrl | len); - - if (gem_intme(entry)) - intme |= TXDCTRL_INTME; - - entry = NEXT_TX(entry); - } - txd = &gp->init_block->txd[first_entry]; - txd->buffer = cpu_to_le64(first_mapping); - wmb(); - txd->control_word = - cpu_to_le64(ctrl | TXDCTRL_SOF | intme | first_len); - } - - gp->tx_new = entry; - if (TX_BUFFS_AVAIL(gp) <= (MAX_SKB_FRAGS + 1)) - netif_stop_queue(dev); - - if (netif_msg_tx_queued(gp)) - printk(KERN_DEBUG "%s: tx queued, slot %d, skblen %d\n", - dev->name, entry, skb->len); - mb(); - writel(gp->tx_new, gp->regs + TXDMA_KICK); - spin_unlock_irqrestore(&gp->tx_lock, flags); - - dev->trans_start = jiffies; - - return NETDEV_TX_OK; -} - -#define STOP_TRIES 32 - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static void gem_reset(struct gem *gp) -{ - int limit; - u32 val; - - /* Make sure we won't get any more interrupts */ - writel(0xffffffff, gp->regs + GREG_IMASK); - - /* Reset the chip */ - writel(gp->swrst_base | GREG_SWRST_TXRST | GREG_SWRST_RXRST, - gp->regs + GREG_SWRST); - - limit = STOP_TRIES; - - do { - udelay(20); - val = readl(gp->regs + GREG_SWRST); - if (limit-- <= 0) - break; - } while (val & (GREG_SWRST_TXRST | GREG_SWRST_RXRST)); - - if (limit <= 0) - printk(KERN_ERR "%s: SW reset is ghetto.\n", gp->dev->name); -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static void gem_start_dma(struct gem *gp) -{ - u32 val; - - /* We are ready to rock, turn everything on. */ - val = readl(gp->regs + TXDMA_CFG); - writel(val | TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG); - val = readl(gp->regs + RXDMA_CFG); - writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); - val = readl(gp->regs + MAC_TXCFG); - writel(val | MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG); - val = readl(gp->regs + MAC_RXCFG); - writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); - - (void) readl(gp->regs + MAC_RXCFG); - udelay(100); - - gem_enable_ints(gp); - - writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); -} - -/* Must be invoked under gp->lock and gp->tx_lock. DMA won't be - * actually stopped before about 4ms tho ... - */ -static void gem_stop_dma(struct gem *gp) -{ - u32 val; - - /* We are done rocking, turn everything off. */ - val = readl(gp->regs + TXDMA_CFG); - writel(val & ~TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG); - val = readl(gp->regs + RXDMA_CFG); - writel(val & ~RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); - val = readl(gp->regs + MAC_TXCFG); - writel(val & ~MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG); - val = readl(gp->regs + MAC_RXCFG); - writel(val & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); - - (void) readl(gp->regs + MAC_RXCFG); - - /* Need to wait a bit ... done by the caller */ -} - - -/* Must be invoked under gp->lock and gp->tx_lock. */ -// XXX dbl check what that function should do when called on PCS PHY -static void gem_begin_auto_negotiation(struct gem *gp, struct ethtool_cmd *ep) -{ - u32 advertise, features; - int autoneg; - int speed; - int duplex; - - if (gp->phy_type != phy_mii_mdio0 && - gp->phy_type != phy_mii_mdio1) - goto non_mii; - - /* Setup advertise */ - if (found_mii_phy(gp)) - features = gp->phy_mii.def->features; - else - features = 0; - - advertise = features & ADVERTISE_MASK; - if (gp->phy_mii.advertising != 0) - advertise &= gp->phy_mii.advertising; - - autoneg = gp->want_autoneg; - speed = gp->phy_mii.speed; - duplex = gp->phy_mii.duplex; - - /* Setup link parameters */ - if (!ep) - goto start_aneg; - if (ep->autoneg == AUTONEG_ENABLE) { - advertise = ep->advertising; - autoneg = 1; - } else { - autoneg = 0; - speed = ep->speed; - duplex = ep->duplex; - } - -start_aneg: - /* Sanitize settings based on PHY capabilities */ - if ((features & SUPPORTED_Autoneg) == 0) - autoneg = 0; - if (speed == SPEED_1000 && - !(features & (SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full))) - speed = SPEED_100; - if (speed == SPEED_100 && - !(features & (SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full))) - speed = SPEED_10; - if (duplex == DUPLEX_FULL && - !(features & (SUPPORTED_1000baseT_Full | - SUPPORTED_100baseT_Full | - SUPPORTED_10baseT_Full))) - duplex = DUPLEX_HALF; - if (speed == 0) - speed = SPEED_10; - - /* If we are asleep, we don't try to actually setup the PHY, we - * just store the settings - */ - if (gp->asleep) { - gp->phy_mii.autoneg = gp->want_autoneg = autoneg; - gp->phy_mii.speed = speed; - gp->phy_mii.duplex = duplex; - return; - } - - /* Configure PHY & start aneg */ - gp->want_autoneg = autoneg; - if (autoneg) { - if (found_mii_phy(gp)) - gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, advertise); - gp->lstate = link_aneg; - } else { - if (found_mii_phy(gp)) - gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, speed, duplex); - gp->lstate = link_force_ok; - } - -non_mii: - gp->timer_ticks = 0; - mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); -} - -/* A link-up condition has occurred, initialize and enable the - * rest of the chip. - * - * Must be invoked under gp->lock and gp->tx_lock. - */ -static int gem_set_link_modes(struct gem *gp) -{ - u32 val; - int full_duplex, speed, pause; - - full_duplex = 0; - speed = SPEED_10; - pause = 0; - - if (found_mii_phy(gp)) { - if (gp->phy_mii.def->ops->read_link(&gp->phy_mii)) - return 1; - full_duplex = (gp->phy_mii.duplex == DUPLEX_FULL); - speed = gp->phy_mii.speed; - pause = gp->phy_mii.pause; - } else if (gp->phy_type == phy_serialink || - gp->phy_type == phy_serdes) { - u32 pcs_lpa = readl(gp->regs + PCS_MIILP); - - if (pcs_lpa & PCS_MIIADV_FD) - full_duplex = 1; - speed = SPEED_1000; - } - - if (netif_msg_link(gp)) - printk(KERN_INFO "%s: Link is up at %d Mbps, %s-duplex.\n", - gp->dev->name, speed, (full_duplex ? "full" : "half")); - - if (!gp->running) - return 0; - - val = (MAC_TXCFG_EIPG0 | MAC_TXCFG_NGU); - if (full_duplex) { - val |= (MAC_TXCFG_ICS | MAC_TXCFG_ICOLL); - } else { - /* MAC_TXCFG_NBO must be zero. */ - } - writel(val, gp->regs + MAC_TXCFG); - - val = (MAC_XIFCFG_OE | MAC_XIFCFG_LLED); - if (!full_duplex && - (gp->phy_type == phy_mii_mdio0 || - gp->phy_type == phy_mii_mdio1)) { - val |= MAC_XIFCFG_DISE; - } else if (full_duplex) { - val |= MAC_XIFCFG_FLED; - } - - if (speed == SPEED_1000) - val |= (MAC_XIFCFG_GMII); - - writel(val, gp->regs + MAC_XIFCFG); - - /* If gigabit and half-duplex, enable carrier extension - * mode. Else, disable it. - */ - if (speed == SPEED_1000 && !full_duplex) { - val = readl(gp->regs + MAC_TXCFG); - writel(val | MAC_TXCFG_TCE, gp->regs + MAC_TXCFG); - - val = readl(gp->regs + MAC_RXCFG); - writel(val | MAC_RXCFG_RCE, gp->regs + MAC_RXCFG); - } else { - val = readl(gp->regs + MAC_TXCFG); - writel(val & ~MAC_TXCFG_TCE, gp->regs + MAC_TXCFG); - - val = readl(gp->regs + MAC_RXCFG); - writel(val & ~MAC_RXCFG_RCE, gp->regs + MAC_RXCFG); - } - - if (gp->phy_type == phy_serialink || - gp->phy_type == phy_serdes) { - u32 pcs_lpa = readl(gp->regs + PCS_MIILP); - - if (pcs_lpa & (PCS_MIIADV_SP | PCS_MIIADV_AP)) - pause = 1; - } - - if (netif_msg_link(gp)) { - if (pause) { - printk(KERN_INFO "%s: Pause is enabled " - "(rxfifo: %d off: %d on: %d)\n", - gp->dev->name, - gp->rx_fifo_sz, - gp->rx_pause_off, - gp->rx_pause_on); - } else { - printk(KERN_INFO "%s: Pause is disabled\n", - gp->dev->name); - } - } - - if (!full_duplex) - writel(512, gp->regs + MAC_STIME); - else - writel(64, gp->regs + MAC_STIME); - val = readl(gp->regs + MAC_MCCFG); - if (pause) - val |= (MAC_MCCFG_SPE | MAC_MCCFG_RPE); - else - val &= ~(MAC_MCCFG_SPE | MAC_MCCFG_RPE); - writel(val, gp->regs + MAC_MCCFG); - - gem_start_dma(gp); - - return 0; -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static int gem_mdio_link_not_up(struct gem *gp) -{ - switch (gp->lstate) { - case link_force_ret: - if (netif_msg_link(gp)) - printk(KERN_INFO "%s: Autoneg failed again, keeping" - " forced mode\n", gp->dev->name); - gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, - gp->last_forced_speed, DUPLEX_HALF); - gp->timer_ticks = 5; - gp->lstate = link_force_ok; - return 0; - case link_aneg: - /* We try forced modes after a failed aneg only on PHYs that don't - * have "magic_aneg" bit set, which means they internally do the - * while forced-mode thingy. On these, we just restart aneg - */ - if (gp->phy_mii.def->magic_aneg) - return 1; - if (netif_msg_link(gp)) - printk(KERN_INFO "%s: switching to forced 100bt\n", - gp->dev->name); - /* Try forced modes. */ - gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_100, - DUPLEX_HALF); - gp->timer_ticks = 5; - gp->lstate = link_force_try; - return 0; - case link_force_try: - /* Downgrade from 100 to 10 Mbps if necessary. - * If already at 10Mbps, warn user about the - * situation every 10 ticks. - */ - if (gp->phy_mii.speed == SPEED_100) { - gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_10, - DUPLEX_HALF); - gp->timer_ticks = 5; - if (netif_msg_link(gp)) - printk(KERN_INFO "%s: switching to forced 10bt\n", - gp->dev->name); - return 0; - } else - return 1; - default: - return 0; - } -} - -static void gem_link_timer(unsigned long data) -{ - struct gem *gp = (struct gem *) data; - int restart_aneg = 0; - - if (gp->asleep) - return; - - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - gem_get_cell(gp); - - /* If the reset task is still pending, we just - * reschedule the link timer - */ - if (gp->reset_task_pending) - goto restart; - - if (gp->phy_type == phy_serialink || - gp->phy_type == phy_serdes) { - u32 val = readl(gp->regs + PCS_MIISTAT); - - if (!(val & PCS_MIISTAT_LS)) - val = readl(gp->regs + PCS_MIISTAT); - - if ((val & PCS_MIISTAT_LS) != 0) { - gp->lstate = link_up; - netif_carrier_on(gp->dev); - (void)gem_set_link_modes(gp); - } - goto restart; - } - if (found_mii_phy(gp) && gp->phy_mii.def->ops->poll_link(&gp->phy_mii)) { - /* Ok, here we got a link. If we had it due to a forced - * fallback, and we were configured for autoneg, we do - * retry a short autoneg pass. If you know your hub is - * broken, use ethtool ;) - */ - if (gp->lstate == link_force_try && gp->want_autoneg) { - gp->lstate = link_force_ret; - gp->last_forced_speed = gp->phy_mii.speed; - gp->timer_ticks = 5; - if (netif_msg_link(gp)) - printk(KERN_INFO "%s: Got link after fallback, retrying" - " autoneg once...\n", gp->dev->name); - gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, gp->phy_mii.advertising); - } else if (gp->lstate != link_up) { - gp->lstate = link_up; - netif_carrier_on(gp->dev); - if (gem_set_link_modes(gp)) - restart_aneg = 1; - } - } else { - /* If the link was previously up, we restart the - * whole process - */ - if (gp->lstate == link_up) { - gp->lstate = link_down; - if (netif_msg_link(gp)) - printk(KERN_INFO "%s: Link down\n", - gp->dev->name); - netif_carrier_off(gp->dev); - gp->reset_task_pending = 1; - schedule_work(&gp->reset_task); - restart_aneg = 1; - } else if (++gp->timer_ticks > 10) { - if (found_mii_phy(gp)) - restart_aneg = gem_mdio_link_not_up(gp); - else - restart_aneg = 1; - } - } - if (restart_aneg) { - gem_begin_auto_negotiation(gp, NULL); - goto out_unlock; - } -restart: - mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); -out_unlock: - gem_put_cell(gp); - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static void gem_clean_rings(struct gem *gp) -{ - struct gem_init_block *gb = gp->init_block; - struct sk_buff *skb; - int i; - dma_addr_t dma_addr; - - for (i = 0; i < RX_RING_SIZE; i++) { - struct gem_rxd *rxd; - - rxd = &gb->rxd[i]; - if (gp->rx_skbs[i] != NULL) { - skb = gp->rx_skbs[i]; - dma_addr = le64_to_cpu(rxd->buffer); - pci_unmap_page(gp->pdev, dma_addr, - RX_BUF_ALLOC_SIZE(gp), - PCI_DMA_FROMDEVICE); - dev_kfree_skb_any(skb); - gp->rx_skbs[i] = NULL; - } - rxd->status_word = 0; - wmb(); - rxd->buffer = 0; - } - - for (i = 0; i < TX_RING_SIZE; i++) { - if (gp->tx_skbs[i] != NULL) { - struct gem_txd *txd; - int frag; - - skb = gp->tx_skbs[i]; - gp->tx_skbs[i] = NULL; - - for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) { - int ent = i & (TX_RING_SIZE - 1); - - txd = &gb->txd[ent]; - dma_addr = le64_to_cpu(txd->buffer); - pci_unmap_page(gp->pdev, dma_addr, - le64_to_cpu(txd->control_word) & - TXDCTRL_BUFSZ, PCI_DMA_TODEVICE); - - if (frag != skb_shinfo(skb)->nr_frags) - i++; - } - dev_kfree_skb_any(skb); - } - } -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static void gem_init_rings(struct gem *gp) -{ - struct gem_init_block *gb = gp->init_block; - struct net_device *dev = gp->dev; - int i; - dma_addr_t dma_addr; - - gp->rx_new = gp->rx_old = gp->tx_new = gp->tx_old = 0; - - gem_clean_rings(gp); - - gp->rx_buf_sz = max(dev->mtu + ETH_HLEN + VLAN_HLEN, - (unsigned)VLAN_ETH_FRAME_LEN); - - for (i = 0; i < RX_RING_SIZE; i++) { - struct sk_buff *skb; - struct gem_rxd *rxd = &gb->rxd[i]; - - skb = gem_alloc_skb(RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC); - if (!skb) { - rxd->buffer = 0; - rxd->status_word = 0; - continue; - } - - gp->rx_skbs[i] = skb; - skb->dev = dev; - skb_put(skb, (gp->rx_buf_sz + RX_OFFSET)); - dma_addr = pci_map_page(gp->pdev, - virt_to_page(skb->data), - offset_in_page(skb->data), - RX_BUF_ALLOC_SIZE(gp), - PCI_DMA_FROMDEVICE); - rxd->buffer = cpu_to_le64(dma_addr); - wmb(); - rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); - skb_reserve(skb, RX_OFFSET); - } - - for (i = 0; i < TX_RING_SIZE; i++) { - struct gem_txd *txd = &gb->txd[i]; - - txd->control_word = 0; - wmb(); - txd->buffer = 0; - } - wmb(); -} - -/* Init PHY interface and start link poll state machine */ -static void gem_init_phy(struct gem *gp) -{ - u32 mifcfg; - - /* Revert MIF CFG setting done on stop_phy */ - mifcfg = readl(gp->regs + MIF_CFG); - mifcfg &= ~MIF_CFG_BBMODE; - writel(mifcfg, gp->regs + MIF_CFG); - - if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) { - int i; - - /* Those delay sucks, the HW seem to love them though, I'll - * serisouly consider breaking some locks here to be able - * to schedule instead - */ - for (i = 0; i < 3; i++) { -#ifdef CONFIG_PPC_PMAC - pmac_call_feature(PMAC_FTR_GMAC_PHY_RESET, gp->of_node, 0, 0); - msleep(20); -#endif - /* Some PHYs used by apple have problem getting back to us, - * we do an additional reset here - */ - phy_write(gp, MII_BMCR, BMCR_RESET); - msleep(20); - if (phy_read(gp, MII_BMCR) != 0xffff) - break; - if (i == 2) - printk(KERN_WARNING "%s: GMAC PHY not responding !\n", - gp->dev->name); - } - } - - if (gp->pdev->vendor == PCI_VENDOR_ID_SUN && - gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) { - u32 val; - - /* Init datapath mode register. */ - if (gp->phy_type == phy_mii_mdio0 || - gp->phy_type == phy_mii_mdio1) { - val = PCS_DMODE_MGM; - } else if (gp->phy_type == phy_serialink) { - val = PCS_DMODE_SM | PCS_DMODE_GMOE; - } else { - val = PCS_DMODE_ESM; - } - - writel(val, gp->regs + PCS_DMODE); - } - - if (gp->phy_type == phy_mii_mdio0 || - gp->phy_type == phy_mii_mdio1) { - // XXX check for errors - mii_phy_probe(&gp->phy_mii, gp->mii_phy_addr); - - /* Init PHY */ - if (gp->phy_mii.def && gp->phy_mii.def->ops->init) - gp->phy_mii.def->ops->init(&gp->phy_mii); - } else { - u32 val; - int limit; - - /* Reset PCS unit. */ - val = readl(gp->regs + PCS_MIICTRL); - val |= PCS_MIICTRL_RST; - writeb(val, gp->regs + PCS_MIICTRL); - - limit = 32; - while (readl(gp->regs + PCS_MIICTRL) & PCS_MIICTRL_RST) { - udelay(100); - if (limit-- <= 0) - break; - } - if (limit <= 0) - printk(KERN_WARNING "%s: PCS reset bit would not clear.\n", - gp->dev->name); - - /* Make sure PCS is disabled while changing advertisement - * configuration. - */ - val = readl(gp->regs + PCS_CFG); - val &= ~(PCS_CFG_ENABLE | PCS_CFG_TO); - writel(val, gp->regs + PCS_CFG); - - /* Advertise all capabilities except assymetric - * pause. - */ - val = readl(gp->regs + PCS_MIIADV); - val |= (PCS_MIIADV_FD | PCS_MIIADV_HD | - PCS_MIIADV_SP | PCS_MIIADV_AP); - writel(val, gp->regs + PCS_MIIADV); - - /* Enable and restart auto-negotiation, disable wrapback/loopback, - * and re-enable PCS. - */ - val = readl(gp->regs + PCS_MIICTRL); - val |= (PCS_MIICTRL_RAN | PCS_MIICTRL_ANE); - val &= ~PCS_MIICTRL_WB; - writel(val, gp->regs + PCS_MIICTRL); - - val = readl(gp->regs + PCS_CFG); - val |= PCS_CFG_ENABLE; - writel(val, gp->regs + PCS_CFG); - - /* Make sure serialink loopback is off. The meaning - * of this bit is logically inverted based upon whether - * you are in Serialink or SERDES mode. - */ - val = readl(gp->regs + PCS_SCTRL); - if (gp->phy_type == phy_serialink) - val &= ~PCS_SCTRL_LOOP; - else - val |= PCS_SCTRL_LOOP; - writel(val, gp->regs + PCS_SCTRL); - } - - /* Default aneg parameters */ - gp->timer_ticks = 0; - gp->lstate = link_down; - netif_carrier_off(gp->dev); - - /* Can I advertise gigabit here ? I'd need BCM PHY docs... */ - spin_lock_irq(&gp->lock); - gem_begin_auto_negotiation(gp, NULL); - spin_unlock_irq(&gp->lock); -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static void gem_init_dma(struct gem *gp) -{ - u64 desc_dma = (u64) gp->gblock_dvma; - u32 val; - - val = (TXDMA_CFG_BASE | (0x7ff << 10) | TXDMA_CFG_PMODE); - writel(val, gp->regs + TXDMA_CFG); - - writel(desc_dma >> 32, gp->regs + TXDMA_DBHI); - writel(desc_dma & 0xffffffff, gp->regs + TXDMA_DBLOW); - desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd)); - - writel(0, gp->regs + TXDMA_KICK); - - val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) | - ((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128); - writel(val, gp->regs + RXDMA_CFG); - - writel(desc_dma >> 32, gp->regs + RXDMA_DBHI); - writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW); - - writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); - - val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF); - val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON); - writel(val, gp->regs + RXDMA_PTHRESH); - - if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN) - writel(((5 & RXDMA_BLANK_IPKTS) | - ((8 << 12) & RXDMA_BLANK_ITIME)), - gp->regs + RXDMA_BLANK); - else - writel(((5 & RXDMA_BLANK_IPKTS) | - ((4 << 12) & RXDMA_BLANK_ITIME)), - gp->regs + RXDMA_BLANK); -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static u32 gem_setup_multicast(struct gem *gp) -{ - u32 rxcfg = 0; - int i; - - if ((gp->dev->flags & IFF_ALLMULTI) || - (gp->dev->mc_count > 256)) { - for (i=0; i<16; i++) - writel(0xffff, gp->regs + MAC_HASH0 + (i << 2)); - rxcfg |= MAC_RXCFG_HFE; - } else if (gp->dev->flags & IFF_PROMISC) { - rxcfg |= MAC_RXCFG_PROM; - } else { - u16 hash_table[16]; - u32 crc; - struct dev_mc_list *dmi = gp->dev->mc_list; - int i; - - for (i = 0; i < 16; i++) - hash_table[i] = 0; - - for (i = 0; i < gp->dev->mc_count; i++) { - char *addrs = dmi->dmi_addr; - - dmi = dmi->next; - - if (!(*addrs & 1)) - continue; - - crc = ether_crc_le(6, addrs); - crc >>= 24; - hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf)); - } - for (i=0; i<16; i++) - writel(hash_table[i], gp->regs + MAC_HASH0 + (i << 2)); - rxcfg |= MAC_RXCFG_HFE; - } - - return rxcfg; -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static void gem_init_mac(struct gem *gp) -{ - unsigned char *e = &gp->dev->dev_addr[0]; - - writel(0x1bf0, gp->regs + MAC_SNDPAUSE); - - writel(0x00, gp->regs + MAC_IPG0); - writel(0x08, gp->regs + MAC_IPG1); - writel(0x04, gp->regs + MAC_IPG2); - writel(0x40, gp->regs + MAC_STIME); - writel(0x40, gp->regs + MAC_MINFSZ); - - /* Ethernet payload + header + FCS + optional VLAN tag. */ - writel(0x20000000 | (gp->rx_buf_sz + 4), gp->regs + MAC_MAXFSZ); - - writel(0x07, gp->regs + MAC_PASIZE); - writel(0x04, gp->regs + MAC_JAMSIZE); - writel(0x10, gp->regs + MAC_ATTLIM); - writel(0x8808, gp->regs + MAC_MCTYPE); - - writel((e[5] | (e[4] << 8)) & 0x3ff, gp->regs + MAC_RANDSEED); - - writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0); - writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1); - writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2); - - writel(0, gp->regs + MAC_ADDR3); - writel(0, gp->regs + MAC_ADDR4); - writel(0, gp->regs + MAC_ADDR5); - - writel(0x0001, gp->regs + MAC_ADDR6); - writel(0xc200, gp->regs + MAC_ADDR7); - writel(0x0180, gp->regs + MAC_ADDR8); - - writel(0, gp->regs + MAC_AFILT0); - writel(0, gp->regs + MAC_AFILT1); - writel(0, gp->regs + MAC_AFILT2); - writel(0, gp->regs + MAC_AF21MSK); - writel(0, gp->regs + MAC_AF0MSK); - - gp->mac_rx_cfg = gem_setup_multicast(gp); -#ifdef STRIP_FCS - gp->mac_rx_cfg |= MAC_RXCFG_SFCS; -#endif - writel(0, gp->regs + MAC_NCOLL); - writel(0, gp->regs + MAC_FASUCC); - writel(0, gp->regs + MAC_ECOLL); - writel(0, gp->regs + MAC_LCOLL); - writel(0, gp->regs + MAC_DTIMER); - writel(0, gp->regs + MAC_PATMPS); - writel(0, gp->regs + MAC_RFCTR); - writel(0, gp->regs + MAC_LERR); - writel(0, gp->regs + MAC_AERR); - writel(0, gp->regs + MAC_FCSERR); - writel(0, gp->regs + MAC_RXCVERR); - - /* Clear RX/TX/MAC/XIF config, we will set these up and enable - * them once a link is established. - */ - writel(0, gp->regs + MAC_TXCFG); - writel(gp->mac_rx_cfg, gp->regs + MAC_RXCFG); - writel(0, gp->regs + MAC_MCCFG); - writel(0, gp->regs + MAC_XIFCFG); - - /* Setup MAC interrupts. We want to get all of the interesting - * counter expiration events, but we do not want to hear about - * normal rx/tx as the DMA engine tells us that. - */ - writel(MAC_TXSTAT_XMIT, gp->regs + MAC_TXMASK); - writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK); - - /* Don't enable even the PAUSE interrupts for now, we - * make no use of those events other than to record them. - */ - writel(0xffffffff, gp->regs + MAC_MCMASK); - - /* Don't enable GEM's WOL in normal operations - */ - if (gp->has_wol) - writel(0, gp->regs + WOL_WAKECSR); -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static void gem_init_pause_thresholds(struct gem *gp) -{ - u32 cfg; - - /* Calculate pause thresholds. Setting the OFF threshold to the - * full RX fifo size effectively disables PAUSE generation which - * is what we do for 10/100 only GEMs which have FIFOs too small - * to make real gains from PAUSE. - */ - if (gp->rx_fifo_sz <= (2 * 1024)) { - gp->rx_pause_off = gp->rx_pause_on = gp->rx_fifo_sz; - } else { - int max_frame = (gp->rx_buf_sz + 4 + 64) & ~63; - int off = (gp->rx_fifo_sz - (max_frame * 2)); - int on = off - max_frame; - - gp->rx_pause_off = off; - gp->rx_pause_on = on; - } - - - /* Configure the chip "burst" DMA mode & enable some - * HW bug fixes on Apple version - */ - cfg = 0; - if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) - cfg |= GREG_CFG_RONPAULBIT | GREG_CFG_ENBUG2FIX; -#if !defined(CONFIG_SPARC64) && !defined(CONFIG_ALPHA) - cfg |= GREG_CFG_IBURST; -#endif - cfg |= ((31 << 1) & GREG_CFG_TXDMALIM); - cfg |= ((31 << 6) & GREG_CFG_RXDMALIM); - writel(cfg, gp->regs + GREG_CFG); - - /* If Infinite Burst didn't stick, then use different - * thresholds (and Apple bug fixes don't exist) - */ - if (!(readl(gp->regs + GREG_CFG) & GREG_CFG_IBURST)) { - cfg = ((2 << 1) & GREG_CFG_TXDMALIM); - cfg |= ((8 << 6) & GREG_CFG_RXDMALIM); - writel(cfg, gp->regs + GREG_CFG); - } -} - -static int gem_check_invariants(struct gem *gp) -{ - struct pci_dev *pdev = gp->pdev; - u32 mif_cfg; - - /* On Apple's sungem, we can't rely on registers as the chip - * was been powered down by the firmware. The PHY is looked - * up later on. - */ - if (pdev->vendor == PCI_VENDOR_ID_APPLE) { - gp->phy_type = phy_mii_mdio0; - gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64; - gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64; - gp->swrst_base = 0; - - mif_cfg = readl(gp->regs + MIF_CFG); - mif_cfg &= ~(MIF_CFG_PSELECT|MIF_CFG_POLL|MIF_CFG_BBMODE|MIF_CFG_MDI1); - mif_cfg |= MIF_CFG_MDI0; - writel(mif_cfg, gp->regs + MIF_CFG); - writel(PCS_DMODE_MGM, gp->regs + PCS_DMODE); - writel(MAC_XIFCFG_OE, gp->regs + MAC_XIFCFG); - - /* We hard-code the PHY address so we can properly bring it out of - * reset later on, we can't really probe it at this point, though - * that isn't an issue. - */ - if (gp->pdev->device == PCI_DEVICE_ID_APPLE_K2_GMAC) - gp->mii_phy_addr = 1; - else - gp->mii_phy_addr = 0; - - return 0; - } - - mif_cfg = readl(gp->regs + MIF_CFG); - - if (pdev->vendor == PCI_VENDOR_ID_SUN && - pdev->device == PCI_DEVICE_ID_SUN_RIO_GEM) { - /* One of the MII PHYs _must_ be present - * as this chip has no gigabit PHY. - */ - if ((mif_cfg & (MIF_CFG_MDI0 | MIF_CFG_MDI1)) == 0) { - printk(KERN_ERR PFX "RIO GEM lacks MII phy, mif_cfg[%08x]\n", - mif_cfg); - return -1; - } - } - - /* Determine initial PHY interface type guess. MDIO1 is the - * external PHY and thus takes precedence over MDIO0. - */ - - if (mif_cfg & MIF_CFG_MDI1) { - gp->phy_type = phy_mii_mdio1; - mif_cfg |= MIF_CFG_PSELECT; - writel(mif_cfg, gp->regs + MIF_CFG); - } else if (mif_cfg & MIF_CFG_MDI0) { - gp->phy_type = phy_mii_mdio0; - mif_cfg &= ~MIF_CFG_PSELECT; - writel(mif_cfg, gp->regs + MIF_CFG); - } else { - gp->phy_type = phy_serialink; - } - if (gp->phy_type == phy_mii_mdio1 || - gp->phy_type == phy_mii_mdio0) { - int i; - - for (i = 0; i < 32; i++) { - gp->mii_phy_addr = i; - if (phy_read(gp, MII_BMCR) != 0xffff) - break; - } - if (i == 32) { - if (pdev->device != PCI_DEVICE_ID_SUN_GEM) { - printk(KERN_ERR PFX "RIO MII phy will not respond.\n"); - return -1; - } - gp->phy_type = phy_serdes; - } - } - - /* Fetch the FIFO configurations now too. */ - gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64; - gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64; - - if (pdev->vendor == PCI_VENDOR_ID_SUN) { - if (pdev->device == PCI_DEVICE_ID_SUN_GEM) { - if (gp->tx_fifo_sz != (9 * 1024) || - gp->rx_fifo_sz != (20 * 1024)) { - printk(KERN_ERR PFX "GEM has bogus fifo sizes tx(%d) rx(%d)\n", - gp->tx_fifo_sz, gp->rx_fifo_sz); - return -1; - } - gp->swrst_base = 0; - } else { - if (gp->tx_fifo_sz != (2 * 1024) || - gp->rx_fifo_sz != (2 * 1024)) { - printk(KERN_ERR PFX "RIO GEM has bogus fifo sizes tx(%d) rx(%d)\n", - gp->tx_fifo_sz, gp->rx_fifo_sz); - return -1; - } - gp->swrst_base = (64 / 4) << GREG_SWRST_CACHE_SHIFT; - } - } - - return 0; -} - -/* Must be invoked under gp->lock and gp->tx_lock. */ -static void gem_reinit_chip(struct gem *gp) -{ - /* Reset the chip */ - gem_reset(gp); - - /* Make sure ints are disabled */ - gem_disable_ints(gp); - - /* Allocate & setup ring buffers */ - gem_init_rings(gp); - - /* Configure pause thresholds */ - gem_init_pause_thresholds(gp); - - /* Init DMA & MAC engines */ - gem_init_dma(gp); - gem_init_mac(gp); -} - - -/* Must be invoked with no lock held. */ -static void gem_stop_phy(struct gem *gp, int wol) -{ - u32 mifcfg; - unsigned long flags; - - /* Let the chip settle down a bit, it seems that helps - * for sleep mode on some models - */ - msleep(10); - - /* Make sure we aren't polling PHY status change. We - * don't currently use that feature though - */ - mifcfg = readl(gp->regs + MIF_CFG); - mifcfg &= ~MIF_CFG_POLL; - writel(mifcfg, gp->regs + MIF_CFG); - - if (wol && gp->has_wol) { - unsigned char *e = &gp->dev->dev_addr[0]; - u32 csr; - - /* Setup wake-on-lan for MAGIC packet */ - writel(MAC_RXCFG_HFE | MAC_RXCFG_SFCS | MAC_RXCFG_ENAB, - gp->regs + MAC_RXCFG); - writel((e[4] << 8) | e[5], gp->regs + WOL_MATCH0); - writel((e[2] << 8) | e[3], gp->regs + WOL_MATCH1); - writel((e[0] << 8) | e[1], gp->regs + WOL_MATCH2); - - writel(WOL_MCOUNT_N | WOL_MCOUNT_M, gp->regs + WOL_MCOUNT); - csr = WOL_WAKECSR_ENABLE; - if ((readl(gp->regs + MAC_XIFCFG) & MAC_XIFCFG_GMII) == 0) - csr |= WOL_WAKECSR_MII; - writel(csr, gp->regs + WOL_WAKECSR); - } else { - writel(0, gp->regs + MAC_RXCFG); - (void)readl(gp->regs + MAC_RXCFG); - /* Machine sleep will die in strange ways if we - * dont wait a bit here, looks like the chip takes - * some time to really shut down - */ - msleep(10); - } - - writel(0, gp->regs + MAC_TXCFG); - writel(0, gp->regs + MAC_XIFCFG); - writel(0, gp->regs + TXDMA_CFG); - writel(0, gp->regs + RXDMA_CFG); - - if (!wol) { - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); - gem_reset(gp); - writel(MAC_TXRST_CMD, gp->regs + MAC_TXRST); - writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST); - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - /* No need to take the lock here */ - - if (found_mii_phy(gp) && gp->phy_mii.def->ops->suspend) - gp->phy_mii.def->ops->suspend(&gp->phy_mii); - - /* According to Apple, we must set the MDIO pins to this begnign - * state or we may 1) eat more current, 2) damage some PHYs - */ - writel(mifcfg | MIF_CFG_BBMODE, gp->regs + MIF_CFG); - writel(0, gp->regs + MIF_BBCLK); - writel(0, gp->regs + MIF_BBDATA); - writel(0, gp->regs + MIF_BBOENAB); - writel(MAC_XIFCFG_GMII | MAC_XIFCFG_LBCK, gp->regs + MAC_XIFCFG); - (void) readl(gp->regs + MAC_XIFCFG); - } -} - - -static int gem_do_start(struct net_device *dev) -{ - struct gem *gp = dev->priv; - unsigned long flags; - - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); - - /* Enable the cell */ - gem_get_cell(gp); - - /* Init & setup chip hardware */ - gem_reinit_chip(gp); - - gp->running = 1; - - if (gp->lstate == link_up) { - netif_carrier_on(gp->dev); - gem_set_link_modes(gp); - } - - netif_wake_queue(gp->dev); - - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - if (request_irq(gp->pdev->irq, gem_interrupt, - SA_SHIRQ, dev->name, (void *)dev)) { - printk(KERN_ERR "%s: failed to request irq !\n", gp->dev->name); - - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); - - gp->running = 0; - gem_reset(gp); - gem_clean_rings(gp); - gem_put_cell(gp); - - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - return -EAGAIN; - } - - return 0; -} - -static void gem_do_stop(struct net_device *dev, int wol) -{ - struct gem *gp = dev->priv; - unsigned long flags; - - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); - - gp->running = 0; - - /* Stop netif queue */ - netif_stop_queue(dev); - - /* Make sure ints are disabled */ - gem_disable_ints(gp); - - /* We can drop the lock now */ - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - /* If we are going to sleep with WOL */ - gem_stop_dma(gp); - msleep(10); - if (!wol) - gem_reset(gp); - msleep(10); - - /* Get rid of rings */ - gem_clean_rings(gp); - - /* No irq needed anymore */ - free_irq(gp->pdev->irq, (void *) dev); - - /* Cell not needed neither if no WOL */ - if (!wol) { - spin_lock_irqsave(&gp->lock, flags); - gem_put_cell(gp); - spin_unlock_irqrestore(&gp->lock, flags); - } -} - -static void gem_reset_task(void *data) -{ - struct gem *gp = (struct gem *) data; - - down(&gp->pm_sem); - - netif_poll_disable(gp->dev); - - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - - if (gp->running == 0) - goto not_running; - - if (gp->running) { - netif_stop_queue(gp->dev); - - /* Reset the chip & rings */ - gem_reinit_chip(gp); - if (gp->lstate == link_up) - gem_set_link_modes(gp); - netif_wake_queue(gp->dev); - } - not_running: - gp->reset_task_pending = 0; - - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); - - netif_poll_enable(gp->dev); - - up(&gp->pm_sem); -} - - -static int gem_open(struct net_device *dev) -{ - struct gem *gp = dev->priv; - int rc = 0; - - down(&gp->pm_sem); - - /* We need the cell enabled */ - if (!gp->asleep) - rc = gem_do_start(dev); - gp->opened = (rc == 0); - - up(&gp->pm_sem); - - return rc; -} - -static int gem_close(struct net_device *dev) -{ - struct gem *gp = dev->priv; - - /* Note: we don't need to call netif_poll_disable() here because - * our caller (dev_close) already did it for us - */ - - down(&gp->pm_sem); - - gp->opened = 0; - if (!gp->asleep) - gem_do_stop(dev, 0); - - up(&gp->pm_sem); - - return 0; -} - -#ifdef CONFIG_PM -static int gem_suspend(struct pci_dev *pdev, pm_message_t state) -{ - struct net_device *dev = pci_get_drvdata(pdev); - struct gem *gp = dev->priv; - unsigned long flags; - - down(&gp->pm_sem); - - netif_poll_disable(dev); - - printk(KERN_INFO "%s: suspending, WakeOnLan %s\n", - dev->name, - (gp->wake_on_lan && gp->opened) ? "enabled" : "disabled"); - - /* Keep the cell enabled during the entire operation */ - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); - gem_get_cell(gp); - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - /* If the driver is opened, we stop the MAC */ - if (gp->opened) { - /* Stop traffic, mark us closed */ - netif_device_detach(dev); - - /* Switch off MAC, remember WOL setting */ - gp->asleep_wol = gp->wake_on_lan; - gem_do_stop(dev, gp->asleep_wol); - } else - gp->asleep_wol = 0; - - /* Mark us asleep */ - gp->asleep = 1; - wmb(); - - /* Stop the link timer */ - del_timer_sync(&gp->link_timer); - - /* Now we release the semaphore to not block the reset task who - * can take it too. We are marked asleep, so there will be no - * conflict here - */ - up(&gp->pm_sem); - - /* Wait for a pending reset task to complete */ - while (gp->reset_task_pending) - yield(); - flush_scheduled_work(); - - /* Shut the PHY down eventually and setup WOL */ - gem_stop_phy(gp, gp->asleep_wol); - - /* Make sure bus master is disabled */ - pci_disable_device(gp->pdev); - - /* Release the cell, no need to take a lock at this point since - * nothing else can happen now - */ - gem_put_cell(gp); - - return 0; -} - -static int gem_resume(struct pci_dev *pdev) -{ - struct net_device *dev = pci_get_drvdata(pdev); - struct gem *gp = dev->priv; - unsigned long flags; - - printk(KERN_INFO "%s: resuming\n", dev->name); - - down(&gp->pm_sem); - - /* Keep the cell enabled during the entire operation, no need to - * take a lock here tho since nothing else can happen while we are - * marked asleep - */ - gem_get_cell(gp); - - /* Make sure PCI access and bus master are enabled */ - if (pci_enable_device(gp->pdev)) { - printk(KERN_ERR "%s: Can't re-enable chip !\n", - dev->name); - /* Put cell and forget it for now, it will be considered as - * still asleep, a new sleep cycle may bring it back - */ - gem_put_cell(gp); - up(&gp->pm_sem); - return 0; - } - pci_set_master(gp->pdev); - - /* Reset everything */ - gem_reset(gp); - - /* Mark us woken up */ - gp->asleep = 0; - wmb(); - - /* Bring the PHY back. Again, lock is useless at this point as - * nothing can be happening until we restart the whole thing - */ - gem_init_phy(gp); - - /* If we were opened, bring everything back */ - if (gp->opened) { - /* Restart MAC */ - gem_do_start(dev); - - /* Re-attach net device */ - netif_device_attach(dev); - - } - - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); - - /* If we had WOL enabled, the cell clock was never turned off during - * sleep, so we end up beeing unbalanced. Fix that here - */ - if (gp->asleep_wol) - gem_put_cell(gp); - - /* This function doesn't need to hold the cell, it will be held if the - * driver is open by gem_do_start(). - */ - gem_put_cell(gp); - - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - netif_poll_enable(dev); - - up(&gp->pm_sem); - - return 0; -} -#endif /* CONFIG_PM */ - -static struct net_device_stats *gem_get_stats(struct net_device *dev) -{ - struct gem *gp = dev->priv; - struct net_device_stats *stats = &gp->net_stats; - - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - - /* I have seen this being called while the PM was in progress, - * so we shield against this - */ - if (gp->running) { - stats->rx_crc_errors += readl(gp->regs + MAC_FCSERR); - writel(0, gp->regs + MAC_FCSERR); - - stats->rx_frame_errors += readl(gp->regs + MAC_AERR); - writel(0, gp->regs + MAC_AERR); - - stats->rx_length_errors += readl(gp->regs + MAC_LERR); - writel(0, gp->regs + MAC_LERR); - - stats->tx_aborted_errors += readl(gp->regs + MAC_ECOLL); - stats->collisions += - (readl(gp->regs + MAC_ECOLL) + - readl(gp->regs + MAC_LCOLL)); - writel(0, gp->regs + MAC_ECOLL); - writel(0, gp->regs + MAC_LCOLL); - } - - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); - - return &gp->net_stats; -} - -static void gem_set_multicast(struct net_device *dev) -{ - struct gem *gp = dev->priv; - u32 rxcfg, rxcfg_new; - int limit = 10000; - - - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - - if (!gp->running) - goto bail; - - netif_stop_queue(dev); - - rxcfg = readl(gp->regs + MAC_RXCFG); - rxcfg_new = gem_setup_multicast(gp); -#ifdef STRIP_FCS - rxcfg_new |= MAC_RXCFG_SFCS; -#endif - gp->mac_rx_cfg = rxcfg_new; - - writel(rxcfg & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); - while (readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB) { - if (!limit--) - break; - udelay(10); - } - - rxcfg &= ~(MAC_RXCFG_PROM | MAC_RXCFG_HFE); - rxcfg |= rxcfg_new; - - writel(rxcfg, gp->regs + MAC_RXCFG); - - netif_wake_queue(dev); - - bail: - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); -} - -/* Jumbo-grams don't seem to work :-( */ -#define GEM_MIN_MTU 68 -#if 1 -#define GEM_MAX_MTU 1500 -#else -#define GEM_MAX_MTU 9000 -#endif - -static int gem_change_mtu(struct net_device *dev, int new_mtu) -{ - struct gem *gp = dev->priv; - - if (new_mtu < GEM_MIN_MTU || new_mtu > GEM_MAX_MTU) - return -EINVAL; - - if (!netif_running(dev) || !netif_device_present(dev)) { - /* We'll just catch it later when the - * device is up'd or resumed. - */ - dev->mtu = new_mtu; - return 0; - } - - down(&gp->pm_sem); - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - dev->mtu = new_mtu; - if (gp->running) { - gem_reinit_chip(gp); - if (gp->lstate == link_up) - gem_set_link_modes(gp); - } - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); - up(&gp->pm_sem); - - return 0; -} - -static void gem_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) -{ - struct gem *gp = dev->priv; - - strcpy(info->driver, DRV_NAME); - strcpy(info->version, DRV_VERSION); - strcpy(info->bus_info, pci_name(gp->pdev)); -} - -static int gem_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct gem *gp = dev->priv; - - if (gp->phy_type == phy_mii_mdio0 || - gp->phy_type == phy_mii_mdio1) { - if (gp->phy_mii.def) - cmd->supported = gp->phy_mii.def->features; - else - cmd->supported = (SUPPORTED_10baseT_Half | - SUPPORTED_10baseT_Full); - - /* XXX hardcoded stuff for now */ - cmd->port = PORT_MII; - cmd->transceiver = XCVR_EXTERNAL; - cmd->phy_address = 0; /* XXX fixed PHYAD */ - - /* Return current PHY settings */ - spin_lock_irq(&gp->lock); - cmd->autoneg = gp->want_autoneg; - cmd->speed = gp->phy_mii.speed; - cmd->duplex = gp->phy_mii.duplex; - cmd->advertising = gp->phy_mii.advertising; - - /* If we started with a forced mode, we don't have a default - * advertise set, we need to return something sensible so - * userland can re-enable autoneg properly. - */ - if (cmd->advertising == 0) - cmd->advertising = cmd->supported; - spin_unlock_irq(&gp->lock); - } else { // XXX PCS ? - cmd->supported = - (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | - SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | - SUPPORTED_Autoneg); - cmd->advertising = cmd->supported; - cmd->speed = 0; - cmd->duplex = cmd->port = cmd->phy_address = - cmd->transceiver = cmd->autoneg = 0; - } - cmd->maxtxpkt = cmd->maxrxpkt = 0; - - return 0; -} - -static int gem_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct gem *gp = dev->priv; - - /* Verify the settings we care about. */ - if (cmd->autoneg != AUTONEG_ENABLE && - cmd->autoneg != AUTONEG_DISABLE) - return -EINVAL; - - if (cmd->autoneg == AUTONEG_ENABLE && - cmd->advertising == 0) - return -EINVAL; - - if (cmd->autoneg == AUTONEG_DISABLE && - ((cmd->speed != SPEED_1000 && - cmd->speed != SPEED_100 && - cmd->speed != SPEED_10) || - (cmd->duplex != DUPLEX_HALF && - cmd->duplex != DUPLEX_FULL))) - return -EINVAL; - - /* Apply settings and restart link process. */ - spin_lock_irq(&gp->lock); - gem_get_cell(gp); - gem_begin_auto_negotiation(gp, cmd); - gem_put_cell(gp); - spin_unlock_irq(&gp->lock); - - return 0; -} - -static int gem_nway_reset(struct net_device *dev) -{ - struct gem *gp = dev->priv; - - if (!gp->want_autoneg) - return -EINVAL; - - /* Restart link process. */ - spin_lock_irq(&gp->lock); - gem_get_cell(gp); - gem_begin_auto_negotiation(gp, NULL); - gem_put_cell(gp); - spin_unlock_irq(&gp->lock); - - return 0; -} - -static u32 gem_get_msglevel(struct net_device *dev) -{ - struct gem *gp = dev->priv; - return gp->msg_enable; -} - -static void gem_set_msglevel(struct net_device *dev, u32 value) -{ - struct gem *gp = dev->priv; - gp->msg_enable = value; -} - - -/* Add more when I understand how to program the chip */ -/* like WAKE_UCAST | WAKE_MCAST | WAKE_BCAST */ - -#define WOL_SUPPORTED_MASK (WAKE_MAGIC) - -static void gem_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) -{ - struct gem *gp = dev->priv; - - /* Add more when I understand how to program the chip */ - if (gp->has_wol) { - wol->supported = WOL_SUPPORTED_MASK; - wol->wolopts = gp->wake_on_lan; - } else { - wol->supported = 0; - wol->wolopts = 0; - } -} - -static int gem_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) -{ - struct gem *gp = dev->priv; - - if (!gp->has_wol) - return -EOPNOTSUPP; - gp->wake_on_lan = wol->wolopts & WOL_SUPPORTED_MASK; - return 0; -} - -static struct ethtool_ops gem_ethtool_ops = { - .get_drvinfo = gem_get_drvinfo, - .get_link = ethtool_op_get_link, - .get_settings = gem_get_settings, - .set_settings = gem_set_settings, - .nway_reset = gem_nway_reset, - .get_msglevel = gem_get_msglevel, - .set_msglevel = gem_set_msglevel, - .get_wol = gem_get_wol, - .set_wol = gem_set_wol, -}; - -static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -{ - struct gem *gp = dev->priv; - struct mii_ioctl_data *data = if_mii(ifr); - int rc = -EOPNOTSUPP; - unsigned long flags; - - /* Hold the PM semaphore while doing ioctl's or we may collide - * with power management. - */ - down(&gp->pm_sem); - - spin_lock_irqsave(&gp->lock, flags); - gem_get_cell(gp); - spin_unlock_irqrestore(&gp->lock, flags); - - switch (cmd) { - case SIOCGMIIPHY: /* Get address of MII PHY in use. */ - data->phy_id = gp->mii_phy_addr; - /* Fallthrough... */ - - case SIOCGMIIREG: /* Read MII PHY register. */ - if (!gp->running) - rc = -EAGAIN; - else { - data->val_out = __phy_read(gp, data->phy_id & 0x1f, - data->reg_num & 0x1f); - rc = 0; - } - break; - - case SIOCSMIIREG: /* Write MII PHY register. */ - if (!capable(CAP_NET_ADMIN)) - rc = -EPERM; - else if (!gp->running) - rc = -EAGAIN; - else { - __phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f, - data->val_in); - rc = 0; - } - break; - }; - - spin_lock_irqsave(&gp->lock, flags); - gem_put_cell(gp); - spin_unlock_irqrestore(&gp->lock, flags); - - up(&gp->pm_sem); - - return rc; -} - -#if (!defined(__sparc__) && !defined(CONFIG_PPC_PMAC)) -/* Fetch MAC address from vital product data of PCI ROM. */ -static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, unsigned char *dev_addr) -{ - int this_offset; - - for (this_offset = 0x20; this_offset < len; this_offset++) { - void __iomem *p = rom_base + this_offset; - int i; - - if (readb(p + 0) != 0x90 || - readb(p + 1) != 0x00 || - readb(p + 2) != 0x09 || - readb(p + 3) != 0x4e || - readb(p + 4) != 0x41 || - readb(p + 5) != 0x06) - continue; - - this_offset += 6; - p += 6; - - for (i = 0; i < 6; i++) - dev_addr[i] = readb(p + i); - return 1; - } - return 0; -} - -static void get_gem_mac_nonobp(struct pci_dev *pdev, unsigned char *dev_addr) -{ - size_t size; - void __iomem *p = pci_map_rom(pdev, &size); - - if (p) { - int found; - - found = readb(p) == 0x55 && - readb(p + 1) == 0xaa && - find_eth_addr_in_vpd(p, (64 * 1024), dev_addr); - pci_unmap_rom(pdev, p); - if (found) - return; - } - - /* Sun MAC prefix then 3 random bytes. */ - dev_addr[0] = 0x08; - dev_addr[1] = 0x00; - dev_addr[2] = 0x20; - get_random_bytes(dev_addr + 3, 3); - return; -} -#endif /* not Sparc and not PPC */ - -static int __devinit gem_get_device_address(struct gem *gp) -{ -#if defined(__sparc__) || defined(CONFIG_PPC_PMAC) - struct net_device *dev = gp->dev; -#endif - -#if defined(__sparc__) - struct pci_dev *pdev = gp->pdev; - struct pcidev_cookie *pcp = pdev->sysdata; - int node = -1; - - if (pcp != NULL) { - node = pcp->prom_node; - if (prom_getproplen(node, "local-mac-address") == 6) - prom_getproperty(node, "local-mac-address", - dev->dev_addr, 6); - else - node = -1; - } - if (node == -1) - memcpy(dev->dev_addr, idprom->id_ethaddr, 6); -#elif defined(CONFIG_PPC_PMAC) - unsigned char *addr; - - addr = get_property(gp->of_node, "local-mac-address", NULL); - if (addr == NULL) { - printk("\n"); - printk(KERN_ERR "%s: can't get mac-address\n", dev->name); - return -1; - } - memcpy(dev->dev_addr, addr, 6); -#else - get_gem_mac_nonobp(gp->pdev, gp->dev->dev_addr); -#endif - return 0; -} - -static void gem_remove_one(struct pci_dev *pdev) -{ - struct net_device *dev = pci_get_drvdata(pdev); - - if (dev) { - struct gem *gp = dev->priv; - - unregister_netdev(dev); - - /* Stop the link timer */ - del_timer_sync(&gp->link_timer); - - /* We shouldn't need any locking here */ - gem_get_cell(gp); - - /* Wait for a pending reset task to complete */ - while (gp->reset_task_pending) - yield(); - flush_scheduled_work(); - - /* Shut the PHY down */ - gem_stop_phy(gp, 0); - - gem_put_cell(gp); - - /* Make sure bus master is disabled */ - pci_disable_device(gp->pdev); - - /* Free resources */ - pci_free_consistent(pdev, - sizeof(struct gem_init_block), - gp->init_block, - gp->gblock_dvma); - iounmap(gp->regs); - pci_release_regions(pdev); - free_netdev(dev); - - pci_set_drvdata(pdev, NULL); - } -} - -static int __devinit gem_init_one(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - static int gem_version_printed = 0; - unsigned long gemreg_base, gemreg_len; - struct net_device *dev; - struct gem *gp; - int i, err, pci_using_dac; - - if (gem_version_printed++ == 0) - printk(KERN_INFO "%s", version); - - /* Apple gmac note: during probe, the chip is powered up by - * the arch code to allow the code below to work (and to let - * the chip be probed on the config space. It won't stay powered - * up until the interface is brought up however, so we can't rely - * on register configuration done at this point. - */ - err = pci_enable_device(pdev); - if (err) { - printk(KERN_ERR PFX "Cannot enable MMIO operation, " - "aborting.\n"); - return err; - } - pci_set_master(pdev); - - /* Configure DMA attributes. */ - - /* All of the GEM documentation states that 64-bit DMA addressing - * is fully supported and should work just fine. However the - * front end for RIO based GEMs is different and only supports - * 32-bit addressing. - * - * For now we assume the various PPC GEMs are 32-bit only as well. - */ - if (pdev->vendor == PCI_VENDOR_ID_SUN && - pdev->device == PCI_DEVICE_ID_SUN_GEM && - !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) { - pci_using_dac = 1; - } else { - err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); - if (err) { - printk(KERN_ERR PFX "No usable DMA configuration, " - "aborting.\n"); - goto err_disable_device; - } - pci_using_dac = 0; - } - - gemreg_base = pci_resource_start(pdev, 0); - gemreg_len = pci_resource_len(pdev, 0); - - if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) { - printk(KERN_ERR PFX "Cannot find proper PCI device " - "base address, aborting.\n"); - err = -ENODEV; - goto err_disable_device; - } - - dev = alloc_etherdev(sizeof(*gp)); - if (!dev) { - printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n"); - err = -ENOMEM; - goto err_disable_device; - } - SET_MODULE_OWNER(dev); - SET_NETDEV_DEV(dev, &pdev->dev); - - gp = dev->priv; - - err = pci_request_regions(pdev, DRV_NAME); - if (err) { - printk(KERN_ERR PFX "Cannot obtain PCI resources, " - "aborting.\n"); - goto err_out_free_netdev; - } - - gp->pdev = pdev; - dev->base_addr = (long) pdev; - gp->dev = dev; - - gp->msg_enable = DEFAULT_MSG; - - spin_lock_init(&gp->lock); - spin_lock_init(&gp->tx_lock); - init_MUTEX(&gp->pm_sem); - - init_timer(&gp->link_timer); - gp->link_timer.function = gem_link_timer; - gp->link_timer.data = (unsigned long) gp; - - INIT_WORK(&gp->reset_task, gem_reset_task, gp); - - gp->lstate = link_down; - gp->timer_ticks = 0; - netif_carrier_off(dev); - - gp->regs = ioremap(gemreg_base, gemreg_len); - if (gp->regs == 0UL) { - printk(KERN_ERR PFX "Cannot map device registers, " - "aborting.\n"); - err = -EIO; - goto err_out_free_res; - } - - /* On Apple, we want a reference to the Open Firmware device-tree - * node. We use it for clock control. - */ -#ifdef CONFIG_PPC_PMAC - gp->of_node = pci_device_to_OF_node(pdev); -#endif - - /* Only Apple version supports WOL afaik */ - if (pdev->vendor == PCI_VENDOR_ID_APPLE) - gp->has_wol = 1; - - /* Make sure cell is enabled */ - gem_get_cell(gp); - - /* Make sure everything is stopped and in init state */ - gem_reset(gp); - - /* Fill up the mii_phy structure (even if we won't use it) */ - gp->phy_mii.dev = dev; - gp->phy_mii.mdio_read = _phy_read; - gp->phy_mii.mdio_write = _phy_write; -#ifdef CONFIG_PPC_PMAC - gp->phy_mii.platform_data = gp->of_node; -#endif - /* By default, we start with autoneg */ - gp->want_autoneg = 1; - - /* Check fifo sizes, PHY type, etc... */ - if (gem_check_invariants(gp)) { - err = -ENODEV; - goto err_out_iounmap; - } - - /* It is guaranteed that the returned buffer will be at least - * PAGE_SIZE aligned. - */ - gp->init_block = (struct gem_init_block *) - pci_alloc_consistent(pdev, sizeof(struct gem_init_block), - &gp->gblock_dvma); - if (!gp->init_block) { - printk(KERN_ERR PFX "Cannot allocate init block, " - "aborting.\n"); - err = -ENOMEM; - goto err_out_iounmap; - } - - if (gem_get_device_address(gp)) - goto err_out_free_consistent; - - dev->open = gem_open; - dev->stop = gem_close; - dev->hard_start_xmit = gem_start_xmit; - dev->get_stats = gem_get_stats; - dev->set_multicast_list = gem_set_multicast; - dev->do_ioctl = gem_ioctl; - dev->poll = gem_poll; - dev->weight = 64; - dev->ethtool_ops = &gem_ethtool_ops; - dev->tx_timeout = gem_tx_timeout; - dev->watchdog_timeo = 5 * HZ; - dev->change_mtu = gem_change_mtu; - dev->irq = pdev->irq; - dev->dma = 0; -#ifdef CONFIG_NET_POLL_CONTROLLER - dev->poll_controller = gem_poll_controller; -#endif - - /* Set that now, in case PM kicks in now */ - pci_set_drvdata(pdev, dev); - - /* Detect & init PHY, start autoneg, we release the cell now - * too, it will be managed by whoever needs it - */ - gem_init_phy(gp); - - spin_lock_irq(&gp->lock); - gem_put_cell(gp); - spin_unlock_irq(&gp->lock); - - /* Register with kernel */ - if (register_netdev(dev)) { - printk(KERN_ERR PFX "Cannot register net device, " - "aborting.\n"); - err = -ENOMEM; - goto err_out_free_consistent; - } - - printk(KERN_INFO "%s: Sun GEM (PCI) 10/100/1000BaseT Ethernet ", - dev->name); - for (i = 0; i < 6; i++) - printk("%2.2x%c", dev->dev_addr[i], - i == 5 ? ' ' : ':'); - printk("\n"); - - if (gp->phy_type == phy_mii_mdio0 || - gp->phy_type == phy_mii_mdio1) - printk(KERN_INFO "%s: Found %s PHY\n", dev->name, - gp->phy_mii.def ? gp->phy_mii.def->name : "no"); - - /* GEM can do it all... */ - dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_LLTX; - if (pci_using_dac) - dev->features |= NETIF_F_HIGHDMA; - - return 0; - -err_out_free_consistent: - gem_remove_one(pdev); -err_out_iounmap: - gem_put_cell(gp); - iounmap(gp->regs); - -err_out_free_res: - pci_release_regions(pdev); - -err_out_free_netdev: - free_netdev(dev); -err_disable_device: - pci_disable_device(pdev); - return err; - -} - - -static struct pci_driver gem_driver = { - .name = GEM_MODULE_NAME, - .id_table = gem_pci_tbl, - .probe = gem_init_one, - .remove = gem_remove_one, -#ifdef CONFIG_PM - .suspend = gem_suspend, - .resume = gem_resume, -#endif /* CONFIG_PM */ -}; - -static int __init gem_init(void) -{ - return pci_module_init(&gem_driver); -} - -static void __exit gem_cleanup(void) -{ - pci_unregister_driver(&gem_driver); -} - -module_init(gem_init); -module_exit(gem_cleanup); |