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-rw-r--r--drivers/net/ethernet/sun/sungem.c3046
1 files changed, 3046 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sun/sungem.c b/drivers/net/ethernet/sun/sungem.c
new file mode 100644
index 000000000..4154e6863
--- /dev/null
+++ b/drivers/net/ethernet/sun/sungem.c
@@ -0,0 +1,3046 @@
+// SPDX-License-Identifier: GPL-2.0
+/* $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)
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#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/sched.h>
+#include <linux/string.h>
+#include <linux/delay.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 <linux/mm.h>
+#include <linux/gfp.h>
+
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include <asm/irq.h>
+
+#ifdef CONFIG_SPARC
+#include <asm/idprom.h>
+#include <asm/prom.h>
+#endif
+
+#ifdef CONFIG_PPC_PMAC
+#include <asm/machdep.h>
+#include <asm/pmac_feature.h>
+#endif
+
+#include <linux/sungem_phy.h>
+#include "sungem.h"
+
+#define 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 | \
+ SUPPORTED_Pause | SUPPORTED_Autoneg)
+
+#define DRV_NAME "sungem"
+#define DRV_VERSION "1.0"
+#define DRV_AUTHOR "David S. Miller <davem@redhat.com>"
+
+static char version[] =
+ DRV_NAME ".c:v" DRV_VERSION " " DRV_AUTHOR "\n";
+
+MODULE_AUTHOR(DRV_AUTHOR);
+MODULE_DESCRIPTION("Sun GEM Gbit ethernet driver");
+MODULE_LICENSE("GPL");
+
+#define GEM_MODULE_NAME "gem"
+
+static const 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 __sungem_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 _sungem_phy_read(struct net_device *dev, int mii_id, int reg)
+{
+ struct gem *gp = netdev_priv(dev);
+ return __sungem_phy_read(gp, mii_id, reg);
+}
+
+static inline u16 sungem_phy_read(struct gem *gp, int reg)
+{
+ return __sungem_phy_read(gp, gp->mii_phy_addr, reg);
+}
+
+static void __sungem_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 _sungem_phy_write(struct net_device *dev, int mii_id, int reg, int val)
+{
+ struct gem *gp = netdev_priv(dev);
+ __sungem_phy_write(gp, mii_id, reg, val & 0xffff);
+}
+
+static inline void sungem_phy_write(struct gem *gp, int reg, u16 val)
+{
+ __sungem_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);
+ (void)readl(gp->regs + GREG_IMASK); /* write posting */
+}
+
+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 inline void gem_netif_stop(struct gem *gp)
+{
+ netif_trans_update(gp->dev); /* prevent tx timeout */
+ napi_disable(&gp->napi);
+ netif_tx_disable(gp->dev);
+}
+
+static inline void gem_netif_start(struct gem *gp)
+{
+ /* NOTE: unconditional netif_wake_queue is only
+ * appropriate so long as all callers are assured to
+ * have free tx slots.
+ */
+ netif_wake_queue(gp->dev);
+ napi_enable(&gp->napi);
+}
+
+static void gem_schedule_reset(struct gem *gp)
+{
+ gp->reset_task_pending = 1;
+ schedule_work(&gp->reset_task);
+}
+
+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)) {
+ netdev_err(dev, "PCS irq but no link status change???\n");
+ 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)
+ netdev_info(dev, "PCS AutoNEG complete, RemoteFault\n");
+ else
+ netdev_info(dev, "PCS AutoNEG complete\n");
+ }
+
+ if (pcs_miistat & PCS_MIISTAT_LS) {
+ netdev_info(dev, "PCS link is now up\n");
+ netif_carrier_on(gp->dev);
+ } else {
+ netdev_info(dev, "PCS link is now down\n");
+ 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) {
+ netdev_err(dev, "TX MAC xmit underrun\n");
+ dev->stats.tx_fifo_errors++;
+ }
+
+ if (txmac_stat & MAC_TXSTAT_MPE) {
+ netdev_err(dev, "TX MAC max packet size error\n");
+ dev->stats.tx_errors++;
+ }
+
+ /* The rest are all cases of one of the 16-bit TX
+ * counters expiring.
+ */
+ if (txmac_stat & MAC_TXSTAT_NCE)
+ dev->stats.collisions += 0x10000;
+
+ if (txmac_stat & MAC_TXSTAT_ECE) {
+ dev->stats.tx_aborted_errors += 0x10000;
+ dev->stats.collisions += 0x10000;
+ }
+
+ if (txmac_stat & MAC_TXSTAT_LCE) {
+ dev->stats.tx_aborted_errors += 0x10000;
+ dev->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) {
+ netdev_err(dev, "RX MAC will not reset, resetting whole chip\n");
+ 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) {
+ netdev_err(dev, "RX MAC will not disable, resetting whole chip\n");
+ 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) {
+ netdev_err(dev, "RX DMA will not disable, resetting whole chip\n");
+ return 1;
+ }
+
+ mdelay(5);
+
+ /* 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) {
+ netdev_err(dev, "RX reset command will not execute, resetting whole chip\n");
+ 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) {
+ netdev_err(dev, "Parts of RX ring empty, resetting whole chip\n");
+ 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) |
+ (ETH_HLEN << 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);
+
+ netdev_err(dev, "RX MAC fifo overflow smac[%08x]\n", smac);
+ dev->stats.rx_over_errors++;
+ dev->stats.rx_fifo_errors++;
+
+ ret = gem_rxmac_reset(gp);
+ }
+
+ if (rxmac_stat & MAC_RXSTAT_ACE)
+ dev->stats.rx_frame_errors += 0x10000;
+
+ if (rxmac_stat & MAC_RXSTAT_CCE)
+ dev->stats.rx_crc_errors += 0x10000;
+
+ if (rxmac_stat & MAC_RXSTAT_LCE)
+ dev->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) {
+ netdev_err(dev, "PCI error [%04x]", pci_estat);
+
+ if (pci_estat & GREG_PCIESTAT_BADACK)
+ pr_cont(" <No ACK64# during ABS64 cycle>");
+ if (pci_estat & GREG_PCIESTAT_DTRTO)
+ pr_cont(" <Delayed transaction timeout>");
+ if (pci_estat & GREG_PCIESTAT_OTHER)
+ pr_cont(" <other>");
+ pr_cont("\n");
+ } else {
+ pci_estat |= GREG_PCIESTAT_OTHER;
+ netdev_err(dev, "PCI error\n");
+ }
+
+ if (pci_estat & GREG_PCIESTAT_OTHER) {
+ int pci_errs;
+
+ /* Interrogate PCI config space for the
+ * true cause.
+ */
+ pci_errs = pci_status_get_and_clear_errors(gp->pdev);
+ netdev_err(dev, "PCI status errors[%04x]\n", pci_errs);
+ if (pci_errs & PCI_STATUS_PARITY)
+ netdev_err(dev, "PCI parity error detected\n");
+ if (pci_errs & PCI_STATUS_SIG_TARGET_ABORT)
+ netdev_err(dev, "PCI target abort\n");
+ if (pci_errs & PCI_STATUS_REC_TARGET_ABORT)
+ netdev_err(dev, "PCI master acks target abort\n");
+ if (pci_errs & PCI_STATUS_REC_MASTER_ABORT)
+ netdev_err(dev, "PCI master abort\n");
+ if (pci_errs & PCI_STATUS_SIG_SYSTEM_ERROR)
+ netdev_err(dev, "PCI system error SERR#\n");
+ if (pci_errs & PCI_STATUS_DETECTED_PARITY)
+ netdev_err(dev, "PCI parity error\n");
+ }
+
+ /* 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);
+ dev->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);
+ dev->stats.rx_errors++;
+
+ return 1;
+ }
+
+ if (gem_status & GREG_STAT_PCS) {
+ if (gem_pcs_interrupt(dev, gp, gem_status))
+ return 1;
+ }
+
+ if (gem_status & GREG_STAT_TXMAC) {
+ if (gem_txmac_interrupt(dev, gp, gem_status))
+ return 1;
+ }
+
+ if (gem_status & GREG_STAT_RXMAC) {
+ if (gem_rxmac_interrupt(dev, gp, gem_status))
+ return 1;
+ }
+
+ if (gem_status & GREG_STAT_MAC) {
+ if (gem_mac_interrupt(dev, gp, gem_status))
+ return 1;
+ }
+
+ if (gem_status & GREG_STAT_MIF) {
+ if (gem_mif_interrupt(dev, gp, gem_status))
+ return 1;
+ }
+
+ if (gem_status & GREG_STAT_PCIERR) {
+ if (gem_pci_interrupt(dev, gp, gem_status))
+ return 1;
+ }
+
+ return 0;
+}
+
+static __inline__ void gem_tx(struct net_device *dev, struct gem *gp, u32 gem_status)
+{
+ int entry, limit;
+
+ 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;
+ dev->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;
+
+ dma_unmap_page(&gp->pdev->dev, dma_addr, dma_len,
+ DMA_TO_DEVICE);
+ entry = NEXT_TX(entry);
+ }
+
+ dev->stats.tx_packets++;
+ dev_consume_skb_any(skb);
+ }
+ gp->tx_old = entry;
+
+ /* Need to make the tx_old update visible to gem_start_xmit()
+ * before checking for netif_queue_stopped(). Without the
+ * memory barrier, there is a small possibility that gem_start_xmit()
+ * will miss it and cause the queue to be stopped forever.
+ */
+ smp_mb();
+
+ if (unlikely(netif_queue_stopped(dev) &&
+ TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1))) {
+ struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
+
+ __netif_tx_lock(txq, smp_processor_id());
+ if (netif_queue_stopped(dev) &&
+ TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1))
+ netif_wake_queue(dev);
+ __netif_tx_unlock(txq);
+ }
+}
+
+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;
+ dma_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);
+ }
+}
+
+#define ALIGNED_RX_SKB_ADDR(addr) \
+ ((((unsigned long)(addr) + (64UL - 1UL)) & ~(64UL - 1UL)) - (unsigned long)(addr))
+static __inline__ struct sk_buff *gem_alloc_skb(struct net_device *dev, int size,
+ gfp_t gfp_flags)
+{
+ struct sk_buff *skb = alloc_skb(size + 64, gfp_flags);
+
+ if (likely(skb)) {
+ unsigned long offset = ALIGNED_RX_SKB_ADDR(skb->data);
+ skb_reserve(skb, offset);
+ }
+ return skb;
+}
+
+static int gem_rx(struct gem *gp, int work_to_do)
+{
+ struct net_device *dev = gp->dev;
+ 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 = le64_to_cpu(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 separate 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)) {
+ dev->stats.rx_errors++;
+ if (len < ETH_ZLEN)
+ dev->stats.rx_length_errors++;
+ if (len & RXDCTRL_BAD)
+ dev->stats.rx_crc_errors++;
+
+ /* We'll just return it to GEM. */
+ drop_it:
+ dev->stats.rx_dropped++;
+ goto next;
+ }
+
+ dma_addr = le64_to_cpu(rxd->buffer);
+ if (len > RX_COPY_THRESHOLD) {
+ struct sk_buff *new_skb;
+
+ new_skb = gem_alloc_skb(dev, RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC);
+ if (new_skb == NULL) {
+ drops++;
+ goto drop_it;
+ }
+ dma_unmap_page(&gp->pdev->dev, dma_addr,
+ RX_BUF_ALLOC_SIZE(gp), DMA_FROM_DEVICE);
+ gp->rx_skbs[entry] = new_skb;
+ skb_put(new_skb, (gp->rx_buf_sz + RX_OFFSET));
+ rxd->buffer = cpu_to_le64(dma_map_page(&gp->pdev->dev,
+ virt_to_page(new_skb->data),
+ offset_in_page(new_skb->data),
+ RX_BUF_ALLOC_SIZE(gp),
+ DMA_FROM_DEVICE));
+ skb_reserve(new_skb, RX_OFFSET);
+
+ /* Trim the original skb for the netif. */
+ skb_trim(skb, len);
+ } else {
+ struct sk_buff *copy_skb = netdev_alloc_skb(dev, len + 2);
+
+ if (copy_skb == NULL) {
+ drops++;
+ goto drop_it;
+ }
+
+ skb_reserve(copy_skb, 2);
+ skb_put(copy_skb, len);
+ dma_sync_single_for_cpu(&gp->pdev->dev, dma_addr, len,
+ DMA_FROM_DEVICE);
+ skb_copy_from_linear_data(skb, copy_skb->data, len);
+ dma_sync_single_for_device(&gp->pdev->dev, dma_addr,
+ len, DMA_FROM_DEVICE);
+
+ /* We'll reuse the original ring buffer. */
+ skb = copy_skb;
+ }
+
+ if (likely(dev->features & NETIF_F_RXCSUM)) {
+ __sum16 csum;
+
+ csum = (__force __sum16)htons((status & RXDCTRL_TCPCSUM) ^ 0xffff);
+ skb->csum = csum_unfold(csum);
+ skb->ip_summed = CHECKSUM_COMPLETE;
+ }
+ skb->protocol = eth_type_trans(skb, gp->dev);
+
+ napi_gro_receive(&gp->napi, skb);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += len;
+
+ next:
+ entry = NEXT_RX(entry);
+ }
+
+ gem_post_rxds(gp, entry);
+
+ gp->rx_new = entry;
+
+ if (drops)
+ netdev_info(gp->dev, "Memory squeeze, deferring packet\n");
+
+ return work_done;
+}
+
+static int gem_poll(struct napi_struct *napi, int budget)
+{
+ struct gem *gp = container_of(napi, struct gem, napi);
+ struct net_device *dev = gp->dev;
+ int work_done;
+
+ work_done = 0;
+ do {
+ /* Handle anomalies */
+ if (unlikely(gp->status & GREG_STAT_ABNORMAL)) {
+ struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
+ int reset;
+
+ /* We run the abnormal interrupt handling code with
+ * the Tx lock. It only resets the Rx portion of the
+ * chip, but we need to guard it against DMA being
+ * restarted by the link poll timer
+ */
+ __netif_tx_lock(txq, smp_processor_id());
+ reset = gem_abnormal_irq(dev, gp, gp->status);
+ __netif_tx_unlock(txq);
+ if (reset) {
+ gem_schedule_reset(gp);
+ napi_complete(napi);
+ return work_done;
+ }
+ }
+
+ /* Run TX completion thread */
+ gem_tx(dev, gp, gp->status);
+
+ /* Run RX thread. We don't use any locking here,
+ * code willing to do bad things - like cleaning the
+ * rx ring - must call napi_disable(), which
+ * schedule_timeout()'s if polling is already disabled.
+ */
+ work_done += gem_rx(gp, budget - work_done);
+
+ if (work_done >= budget)
+ return work_done;
+
+ gp->status = readl(gp->regs + GREG_STAT);
+ } while (gp->status & GREG_STAT_NAPI);
+
+ napi_complete_done(napi, work_done);
+ gem_enable_ints(gp);
+
+ return work_done;
+}
+
+static irqreturn_t gem_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct gem *gp = netdev_priv(dev);
+
+ if (napi_schedule_prep(&gp->napi)) {
+ u32 gem_status = readl(gp->regs + GREG_STAT);
+
+ if (unlikely(gem_status == 0)) {
+ napi_enable(&gp->napi);
+ return IRQ_NONE;
+ }
+ if (netif_msg_intr(gp))
+ printk(KERN_DEBUG "%s: gem_interrupt() gem_status: 0x%x\n",
+ gp->dev->name, gem_status);
+
+ gp->status = gem_status;
+ gem_disable_ints(gp);
+ __napi_schedule(&gp->napi);
+ }
+
+ /* 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)
+{
+ struct gem *gp = netdev_priv(dev);
+
+ disable_irq(gp->pdev->irq);
+ gem_interrupt(gp->pdev->irq, dev);
+ enable_irq(gp->pdev->irq);
+}
+#endif
+
+static void gem_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ struct gem *gp = netdev_priv(dev);
+
+ netdev_err(dev, "transmit timed out, resetting\n");
+
+ netdev_err(dev, "TX_STATE[%08x:%08x:%08x]\n",
+ readl(gp->regs + TXDMA_CFG),
+ readl(gp->regs + MAC_TXSTAT),
+ readl(gp->regs + MAC_TXCFG));
+ netdev_err(dev, "RX_STATE[%08x:%08x:%08x]\n",
+ readl(gp->regs + RXDMA_CFG),
+ readl(gp->regs + MAC_RXSTAT),
+ readl(gp->regs + MAC_RXCFG));
+
+ gem_schedule_reset(gp);
+}
+
+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 netdev_tx_t gem_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct gem *gp = netdev_priv(dev);
+ int entry;
+ u64 ctrl;
+
+ ctrl = 0;
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ const u64 csum_start_off = skb_checksum_start_offset(skb);
+ const u64 csum_stuff_off = csum_start_off + skb->csum_offset;
+
+ ctrl = (TXDCTRL_CENAB |
+ (csum_start_off << 15) |
+ (csum_stuff_off << 21));
+ }
+
+ if (unlikely(TX_BUFFS_AVAIL(gp) <= (skb_shinfo(skb)->nr_frags + 1))) {
+ /* This is a hard error, log it. */
+ if (!netif_queue_stopped(dev)) {
+ netif_stop_queue(dev);
+ netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
+ }
+ 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 = dma_map_page(&gp->pdev->dev,
+ virt_to_page(skb->data),
+ offset_in_page(skb->data),
+ len, DMA_TO_DEVICE);
+ ctrl |= TXDCTRL_SOF | TXDCTRL_EOF | len;
+ if (gem_intme(entry))
+ ctrl |= TXDCTRL_INTME;
+ txd->buffer = cpu_to_le64(mapping);
+ dma_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 = dma_map_page(&gp->pdev->dev,
+ virt_to_page(skb->data),
+ offset_in_page(skb->data),
+ first_len, DMA_TO_DEVICE);
+ entry = NEXT_TX(entry);
+
+ for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
+ const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
+ u32 len;
+ dma_addr_t mapping;
+ u64 this_ctrl;
+
+ len = skb_frag_size(this_frag);
+ mapping = skb_frag_dma_map(&gp->pdev->dev, this_frag,
+ 0, len, DMA_TO_DEVICE);
+ 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);
+ dma_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);
+ dma_wmb();
+ txd->control_word =
+ cpu_to_le64(ctrl | TXDCTRL_SOF | intme | first_len);
+ }
+
+ gp->tx_new = entry;
+ if (unlikely(TX_BUFFS_AVAIL(gp) <= (MAX_SKB_FRAGS + 1))) {
+ netif_stop_queue(dev);
+
+ /* netif_stop_queue() must be done before checking
+ * tx index in TX_BUFFS_AVAIL() below, because
+ * in gem_tx(), we update tx_old before checking for
+ * netif_queue_stopped().
+ */
+ smp_mb();
+ if (TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1))
+ netif_wake_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);
+
+ return NETDEV_TX_OK;
+}
+
+static void gem_pcs_reset(struct gem *gp)
+{
+ int limit;
+ u32 val;
+
+ /* Reset PCS unit. */
+ val = readl(gp->regs + PCS_MIICTRL);
+ val |= PCS_MIICTRL_RST;
+ writel(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)
+ netdev_warn(gp->dev, "PCS reset bit would not clear\n");
+}
+
+static void gem_pcs_reinit_adv(struct gem *gp)
+{
+ u32 val;
+
+ /* 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 asymmetric
+ * 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);
+}
+
+#define STOP_TRIES 32
+
+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)
+ netdev_err(gp->dev, "SW reset is ghetto\n");
+
+ if (gp->phy_type == phy_serialink || gp->phy_type == phy_serdes)
+ gem_pcs_reinit_adv(gp);
+}
+
+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);
+}
+
+/* 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 */
+}
+
+
+// XXX dbl check what that function should do when called on PCS PHY
+static void gem_begin_auto_negotiation(struct gem *gp,
+ const struct ethtool_link_ksettings *ep)
+{
+ u32 advertise, features;
+ int autoneg;
+ int speed;
+ int duplex;
+ u32 advertising;
+
+ if (ep)
+ ethtool_convert_link_mode_to_legacy_u32(
+ &advertising, ep->link_modes.advertising);
+
+ 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->base.autoneg == AUTONEG_ENABLE) {
+ advertise = advertising;
+ autoneg = 1;
+ } else {
+ autoneg = 0;
+ speed = ep->base.speed;
+ duplex = ep->base.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 (!netif_device_present(gp->dev)) {
+ 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.
+ */
+static int gem_set_link_modes(struct gem *gp)
+{
+ struct netdev_queue *txq = netdev_get_tx_queue(gp->dev, 0);
+ int full_duplex, speed, pause;
+ u32 val;
+
+ 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) || gp->phy_type == phy_serdes)
+ full_duplex = 1;
+ speed = SPEED_1000;
+ }
+
+ netif_info(gp, link, gp->dev, "Link is up at %d Mbps, %s-duplex\n",
+ speed, (full_duplex ? "full" : "half"));
+
+
+ /* We take the tx queue lock to avoid collisions between
+ * this code, the tx path and the NAPI-driven error path
+ */
+ __netif_tx_lock(txq, smp_processor_id());
+
+ 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 (!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);
+
+ __netif_tx_unlock(txq);
+
+ if (netif_msg_link(gp)) {
+ if (pause) {
+ netdev_info(gp->dev,
+ "Pause is enabled (rxfifo: %d off: %d on: %d)\n",
+ gp->rx_fifo_sz,
+ gp->rx_pause_off,
+ gp->rx_pause_on);
+ } else {
+ netdev_info(gp->dev, "Pause is disabled\n");
+ }
+ }
+
+ return 0;
+}
+
+static int gem_mdio_link_not_up(struct gem *gp)
+{
+ switch (gp->lstate) {
+ case link_force_ret:
+ netif_info(gp, link, gp->dev,
+ "Autoneg failed again, keeping forced mode\n");
+ 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;
+ netif_info(gp, link, gp->dev, "switching to forced 100bt\n");
+ /* 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;
+ netif_info(gp, link, gp->dev,
+ "switching to forced 10bt\n");
+ return 0;
+ } else
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static void gem_link_timer(struct timer_list *t)
+{
+ struct gem *gp = from_timer(gp, t, link_timer);
+ struct net_device *dev = gp->dev;
+ int restart_aneg = 0;
+
+ /* There's no point doing anything if we're going to be reset */
+ if (gp->reset_task_pending)
+ return;
+
+ 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) {
+ if (gp->lstate == link_up)
+ goto restart;
+
+ gp->lstate = link_up;
+ netif_carrier_on(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))
+ netdev_info(dev,
+ "Got link after fallback, retrying autoneg once...\n");
+ 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(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;
+ netif_info(gp, link, dev, "Link down\n");
+ netif_carrier_off(dev);
+ gem_schedule_reset(gp);
+ /* The reset task will restart the timer */
+ return;
+ } 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);
+ return;
+ }
+restart:
+ mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10));
+}
+
+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);
+ dma_unmap_page(&gp->pdev->dev, dma_addr,
+ RX_BUF_ALLOC_SIZE(gp),
+ DMA_FROM_DEVICE);
+ dev_kfree_skb_any(skb);
+ gp->rx_skbs[i] = NULL;
+ }
+ rxd->status_word = 0;
+ dma_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);
+ dma_unmap_page(&gp->pdev->dev, dma_addr,
+ le64_to_cpu(txd->control_word) &
+ TXDCTRL_BUFSZ, DMA_TO_DEVICE);
+
+ if (frag != skb_shinfo(skb)->nr_frags)
+ i++;
+ }
+ dev_kfree_skb_any(skb);
+ }
+ }
+}
+
+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(dev, RX_BUF_ALLOC_SIZE(gp), GFP_KERNEL);
+ if (!skb) {
+ rxd->buffer = 0;
+ rxd->status_word = 0;
+ continue;
+ }
+
+ gp->rx_skbs[i] = skb;
+ skb_put(skb, (gp->rx_buf_sz + RX_OFFSET));
+ dma_addr = dma_map_page(&gp->pdev->dev,
+ virt_to_page(skb->data),
+ offset_in_page(skb->data),
+ RX_BUF_ALLOC_SIZE(gp),
+ DMA_FROM_DEVICE);
+ rxd->buffer = cpu_to_le64(dma_addr);
+ dma_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;
+ dma_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 delays sucks, the HW seems to love them though, I'll
+ * seriously 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
+ */
+ sungem_phy_write(gp, MII_BMCR, BMCR_RESET);
+ msleep(20);
+ if (sungem_phy_read(gp, MII_BMCR) != 0xffff)
+ break;
+ if (i == 2)
+ netdev_warn(gp->dev, "GMAC PHY not responding !\n");
+ }
+ }
+
+ 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) {
+ /* Reset and detect MII PHY */
+ sungem_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 {
+ gem_pcs_reset(gp);
+ gem_pcs_reinit_adv(gp);
+ }
+
+ /* Default aneg parameters */
+ gp->timer_ticks = 0;
+ gp->lstate = link_down;
+ netif_carrier_off(gp->dev);
+
+ /* Print things out */
+ if (gp->phy_type == phy_mii_mdio0 ||
+ gp->phy_type == phy_mii_mdio1)
+ netdev_info(gp->dev, "Found %s PHY\n",
+ gp->phy_mii.def ? gp->phy_mii.def->name : "no");
+
+ gem_begin_auto_negotiation(gp, NULL);
+}
+
+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) |
+ (ETH_HLEN << 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);
+}
+
+static u32 gem_setup_multicast(struct gem *gp)
+{
+ u32 rxcfg = 0;
+ int i;
+
+ if ((gp->dev->flags & IFF_ALLMULTI) ||
+ (netdev_mc_count(gp->dev) > 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 netdev_hw_addr *ha;
+ int i;
+
+ memset(hash_table, 0, sizeof(hash_table));
+ netdev_for_each_mc_addr(ha, gp->dev) {
+ crc = ether_crc_le(6, ha->addr);
+ 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;
+}
+
+static void gem_init_mac(struct gem *gp)
+{
+ const 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);
+}
+
+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) {
+ pr_err("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 {
+#ifdef CONFIG_SPARC
+ const char *p;
+
+ p = of_get_property(gp->of_node, "shared-pins", NULL);
+ if (p && !strcmp(p, "serdes"))
+ gp->phy_type = phy_serdes;
+ else
+#endif
+ 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 (sungem_phy_read(gp, MII_BMCR) != 0xffff)
+ break;
+ }
+ if (i == 32) {
+ if (pdev->device != PCI_DEVICE_ID_SUN_GEM) {
+ pr_err("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)) {
+ pr_err("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)) {
+ pr_err("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;
+}
+
+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);
+}
+
+
+static void gem_stop_phy(struct gem *gp, int wol)
+{
+ u32 mifcfg;
+
+ /* 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) {
+ const 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) {
+ gem_reset(gp);
+ writel(MAC_TXRST_CMD, gp->regs + MAC_TXRST);
+ writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST);
+
+ 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 = netdev_priv(dev);
+ int rc;
+
+ pci_set_master(gp->pdev);
+
+ /* Init & setup chip hardware */
+ gem_reinit_chip(gp);
+
+ /* An interrupt might come in handy */
+ rc = request_irq(gp->pdev->irq, gem_interrupt,
+ IRQF_SHARED, dev->name, (void *)dev);
+ if (rc) {
+ netdev_err(dev, "failed to request irq !\n");
+
+ gem_reset(gp);
+ gem_clean_rings(gp);
+ gem_put_cell(gp);
+ return rc;
+ }
+
+ /* Mark us as attached again if we come from resume(), this has
+ * no effect if we weren't detached and needs to be done now.
+ */
+ netif_device_attach(dev);
+
+ /* Restart NAPI & queues */
+ gem_netif_start(gp);
+
+ /* Detect & init PHY, start autoneg etc... this will
+ * eventually result in starting DMA operations when
+ * the link is up
+ */
+ gem_init_phy(gp);
+
+ return 0;
+}
+
+static void gem_do_stop(struct net_device *dev, int wol)
+{
+ struct gem *gp = netdev_priv(dev);
+
+ /* Stop NAPI and stop tx queue */
+ gem_netif_stop(gp);
+
+ /* Make sure ints are disabled. We don't care about
+ * synchronizing as NAPI is disabled, thus a stray
+ * interrupt will do nothing bad (our irq handler
+ * just schedules NAPI)
+ */
+ gem_disable_ints(gp);
+
+ /* Stop the link timer */
+ del_timer_sync(&gp->link_timer);
+
+ /* We cannot cancel the reset task while holding the
+ * rtnl lock, we'd get an A->B / B->A deadlock stituation
+ * if we did. This is not an issue however as the reset
+ * task is synchronized vs. us (rtnl_lock) and will do
+ * nothing if the device is down or suspended. We do
+ * still clear reset_task_pending to avoid a spurrious
+ * reset later on in case we do resume before it gets
+ * scheduled.
+ */
+ gp->reset_task_pending = 0;
+
+ /* 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);
+
+ /* Shut the PHY down eventually and setup WOL */
+ gem_stop_phy(gp, wol);
+}
+
+static void gem_reset_task(struct work_struct *work)
+{
+ struct gem *gp = container_of(work, struct gem, reset_task);
+
+ /* Lock out the network stack (essentially shield ourselves
+ * against a racing open, close, control call, or suspend
+ */
+ rtnl_lock();
+
+ /* Skip the reset task if suspended or closed, or if it's
+ * been cancelled by gem_do_stop (see comment there)
+ */
+ if (!netif_device_present(gp->dev) ||
+ !netif_running(gp->dev) ||
+ !gp->reset_task_pending) {
+ rtnl_unlock();
+ return;
+ }
+
+ /* Stop the link timer */
+ del_timer_sync(&gp->link_timer);
+
+ /* Stop NAPI and tx */
+ gem_netif_stop(gp);
+
+ /* Reset the chip & rings */
+ gem_reinit_chip(gp);
+ if (gp->lstate == link_up)
+ gem_set_link_modes(gp);
+
+ /* Restart NAPI and Tx */
+ gem_netif_start(gp);
+
+ /* We are back ! */
+ gp->reset_task_pending = 0;
+
+ /* If the link is not up, restart autoneg, else restart the
+ * polling timer
+ */
+ if (gp->lstate != link_up)
+ gem_begin_auto_negotiation(gp, NULL);
+ else
+ mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10));
+
+ rtnl_unlock();
+}
+
+static int gem_open(struct net_device *dev)
+{
+ struct gem *gp = netdev_priv(dev);
+ int rc;
+
+ /* We allow open while suspended, we just do nothing,
+ * the chip will be initialized in resume()
+ */
+ if (netif_device_present(dev)) {
+ /* Enable the cell */
+ gem_get_cell(gp);
+
+ /* Make sure PCI access and bus master are enabled */
+ rc = pci_enable_device(gp->pdev);
+ if (rc) {
+ netdev_err(dev, "Failed to enable chip on PCI bus !\n");
+
+ /* 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);
+ return -ENXIO;
+ }
+ return gem_do_start(dev);
+ }
+
+ return 0;
+}
+
+static int gem_close(struct net_device *dev)
+{
+ struct gem *gp = netdev_priv(dev);
+
+ if (netif_device_present(dev)) {
+ gem_do_stop(dev, 0);
+
+ /* Make sure bus master is disabled */
+ pci_disable_device(gp->pdev);
+
+ /* Cell not needed neither if no WOL */
+ if (!gp->asleep_wol)
+ gem_put_cell(gp);
+ }
+ return 0;
+}
+
+static int __maybe_unused gem_suspend(struct device *dev_d)
+{
+ struct net_device *dev = dev_get_drvdata(dev_d);
+ struct gem *gp = netdev_priv(dev);
+
+ /* Lock the network stack first to avoid racing with open/close,
+ * reset task and setting calls
+ */
+ rtnl_lock();
+
+ /* Not running, mark ourselves non-present, no need for
+ * a lock here
+ */
+ if (!netif_running(dev)) {
+ netif_device_detach(dev);
+ rtnl_unlock();
+ return 0;
+ }
+ netdev_info(dev, "suspending, WakeOnLan %s\n",
+ (gp->wake_on_lan && netif_running(dev)) ?
+ "enabled" : "disabled");
+
+ /* Tell the network stack we're gone. gem_do_stop() below will
+ * synchronize with TX, stop NAPI etc...
+ */
+ netif_device_detach(dev);
+
+ /* Switch off chip, remember WOL setting */
+ gp->asleep_wol = !!gp->wake_on_lan;
+ gem_do_stop(dev, gp->asleep_wol);
+
+ /* Cell not needed neither if no WOL */
+ if (!gp->asleep_wol)
+ gem_put_cell(gp);
+
+ /* Unlock the network stack */
+ rtnl_unlock();
+
+ return 0;
+}
+
+static int __maybe_unused gem_resume(struct device *dev_d)
+{
+ struct net_device *dev = dev_get_drvdata(dev_d);
+ struct gem *gp = netdev_priv(dev);
+
+ /* See locking comment in gem_suspend */
+ rtnl_lock();
+
+ /* Not running, mark ourselves present, no need for
+ * a lock here
+ */
+ if (!netif_running(dev)) {
+ netif_device_attach(dev);
+ rtnl_unlock();
+ return 0;
+ }
+
+ /* Enable the cell */
+ gem_get_cell(gp);
+
+ /* Restart chip. If that fails there isn't much we can do, we
+ * leave things stopped.
+ */
+ gem_do_start(dev);
+
+ /* 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);
+
+ /* Unlock the network stack */
+ rtnl_unlock();
+
+ return 0;
+}
+
+static struct net_device_stats *gem_get_stats(struct net_device *dev)
+{
+ struct gem *gp = netdev_priv(dev);
+
+ /* I have seen this being called while the PM was in progress,
+ * so we shield against this. Let's also not poke at registers
+ * while the reset task is going on.
+ *
+ * TODO: Move stats collection elsewhere (link timer ?) and
+ * make this a nop to avoid all those synchro issues
+ */
+ if (!netif_device_present(dev) || !netif_running(dev))
+ goto bail;
+
+ /* Better safe than sorry... */
+ if (WARN_ON(!gp->cell_enabled))
+ goto bail;
+
+ dev->stats.rx_crc_errors += readl(gp->regs + MAC_FCSERR);
+ writel(0, gp->regs + MAC_FCSERR);
+
+ dev->stats.rx_frame_errors += readl(gp->regs + MAC_AERR);
+ writel(0, gp->regs + MAC_AERR);
+
+ dev->stats.rx_length_errors += readl(gp->regs + MAC_LERR);
+ writel(0, gp->regs + MAC_LERR);
+
+ dev->stats.tx_aborted_errors += readl(gp->regs + MAC_ECOLL);
+ dev->stats.collisions +=
+ (readl(gp->regs + MAC_ECOLL) + readl(gp->regs + MAC_LCOLL));
+ writel(0, gp->regs + MAC_ECOLL);
+ writel(0, gp->regs + MAC_LCOLL);
+ bail:
+ return &dev->stats;
+}
+
+static int gem_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct sockaddr *macaddr = (struct sockaddr *) addr;
+ const unsigned char *e = &dev->dev_addr[0];
+ struct gem *gp = netdev_priv(dev);
+
+ if (!is_valid_ether_addr(macaddr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ eth_hw_addr_set(dev, macaddr->sa_data);
+
+ /* We'll just catch it later when the device is up'd or resumed */
+ if (!netif_running(dev) || !netif_device_present(dev))
+ return 0;
+
+ /* Better safe than sorry... */
+ if (WARN_ON(!gp->cell_enabled))
+ return 0;
+
+ 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);
+
+ return 0;
+}
+
+static void gem_set_multicast(struct net_device *dev)
+{
+ struct gem *gp = netdev_priv(dev);
+ u32 rxcfg, rxcfg_new;
+ int limit = 10000;
+
+ if (!netif_running(dev) || !netif_device_present(dev))
+ return;
+
+ /* Better safe than sorry... */
+ if (gp->reset_task_pending || WARN_ON(!gp->cell_enabled))
+ return;
+
+ 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);
+}
+
+/* Jumbo-grams don't seem to work :-( */
+#define GEM_MIN_MTU ETH_MIN_MTU
+#if 1
+#define GEM_MAX_MTU ETH_DATA_LEN
+#else
+#define GEM_MAX_MTU 9000
+#endif
+
+static int gem_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct gem *gp = netdev_priv(dev);
+
+ dev->mtu = new_mtu;
+
+ /* We'll just catch it later when the device is up'd or resumed */
+ if (!netif_running(dev) || !netif_device_present(dev))
+ return 0;
+
+ /* Better safe than sorry... */
+ if (WARN_ON(!gp->cell_enabled))
+ return 0;
+
+ gem_netif_stop(gp);
+ gem_reinit_chip(gp);
+ if (gp->lstate == link_up)
+ gem_set_link_modes(gp);
+ gem_netif_start(gp);
+
+ return 0;
+}
+
+static void gem_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ struct gem *gp = netdev_priv(dev);
+
+ strscpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strscpy(info->version, DRV_VERSION, sizeof(info->version));
+ strscpy(info->bus_info, pci_name(gp->pdev), sizeof(info->bus_info));
+}
+
+static int gem_get_link_ksettings(struct net_device *dev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct gem *gp = netdev_priv(dev);
+ u32 supported, advertising;
+
+ if (gp->phy_type == phy_mii_mdio0 ||
+ gp->phy_type == phy_mii_mdio1) {
+ if (gp->phy_mii.def)
+ supported = gp->phy_mii.def->features;
+ else
+ supported = (SUPPORTED_10baseT_Half |
+ SUPPORTED_10baseT_Full);
+
+ /* XXX hardcoded stuff for now */
+ cmd->base.port = PORT_MII;
+ cmd->base.phy_address = 0; /* XXX fixed PHYAD */
+
+ /* Return current PHY settings */
+ cmd->base.autoneg = gp->want_autoneg;
+ cmd->base.speed = gp->phy_mii.speed;
+ cmd->base.duplex = gp->phy_mii.duplex;
+ 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 (advertising == 0)
+ advertising = supported;
+ } else { // XXX PCS ?
+ supported =
+ (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
+ SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
+ SUPPORTED_Autoneg);
+ advertising = supported;
+ cmd->base.speed = 0;
+ cmd->base.duplex = 0;
+ cmd->base.port = 0;
+ cmd->base.phy_address = 0;
+ cmd->base.autoneg = 0;
+
+ /* serdes means usually a Fibre connector, with most fixed */
+ if (gp->phy_type == phy_serdes) {
+ cmd->base.port = PORT_FIBRE;
+ supported = (SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full |
+ SUPPORTED_FIBRE | SUPPORTED_Autoneg |
+ SUPPORTED_Pause | SUPPORTED_Asym_Pause);
+ advertising = supported;
+ if (gp->lstate == link_up)
+ cmd->base.speed = SPEED_1000;
+ cmd->base.duplex = DUPLEX_FULL;
+ cmd->base.autoneg = 1;
+ }
+ }
+
+ ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
+ supported);
+ ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
+ advertising);
+
+ return 0;
+}
+
+static int gem_set_link_ksettings(struct net_device *dev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct gem *gp = netdev_priv(dev);
+ u32 speed = cmd->base.speed;
+ u32 advertising;
+
+ ethtool_convert_link_mode_to_legacy_u32(&advertising,
+ cmd->link_modes.advertising);
+
+ /* Verify the settings we care about. */
+ if (cmd->base.autoneg != AUTONEG_ENABLE &&
+ cmd->base.autoneg != AUTONEG_DISABLE)
+ return -EINVAL;
+
+ if (cmd->base.autoneg == AUTONEG_ENABLE &&
+ advertising == 0)
+ return -EINVAL;
+
+ if (cmd->base.autoneg == AUTONEG_DISABLE &&
+ ((speed != SPEED_1000 &&
+ speed != SPEED_100 &&
+ speed != SPEED_10) ||
+ (cmd->base.duplex != DUPLEX_HALF &&
+ cmd->base.duplex != DUPLEX_FULL)))
+ return -EINVAL;
+
+ /* Apply settings and restart link process. */
+ if (netif_device_present(gp->dev)) {
+ del_timer_sync(&gp->link_timer);
+ gem_begin_auto_negotiation(gp, cmd);
+ }
+
+ return 0;
+}
+
+static int gem_nway_reset(struct net_device *dev)
+{
+ struct gem *gp = netdev_priv(dev);
+
+ if (!gp->want_autoneg)
+ return -EINVAL;
+
+ /* Restart link process */
+ if (netif_device_present(gp->dev)) {
+ del_timer_sync(&gp->link_timer);
+ gem_begin_auto_negotiation(gp, NULL);
+ }
+
+ return 0;
+}
+
+static u32 gem_get_msglevel(struct net_device *dev)
+{
+ struct gem *gp = netdev_priv(dev);
+ return gp->msg_enable;
+}
+
+static void gem_set_msglevel(struct net_device *dev, u32 value)
+{
+ struct gem *gp = netdev_priv(dev);
+ 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 = netdev_priv(dev);
+
+ /* 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 = netdev_priv(dev);
+
+ if (!gp->has_wol)
+ return -EOPNOTSUPP;
+ gp->wake_on_lan = wol->wolopts & WOL_SUPPORTED_MASK;
+ return 0;
+}
+
+static const struct ethtool_ops gem_ethtool_ops = {
+ .get_drvinfo = gem_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .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,
+ .get_link_ksettings = gem_get_link_ksettings,
+ .set_link_ksettings = gem_set_link_ksettings,
+};
+
+static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ struct gem *gp = netdev_priv(dev);
+ struct mii_ioctl_data *data = if_mii(ifr);
+ int rc = -EOPNOTSUPP;
+
+ /* For SIOCGMIIREG and SIOCSMIIREG the core checks for us that
+ * netif_device_present() is true and holds rtnl_lock for us
+ * so we have nothing to worry about
+ */
+
+ 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. */
+ data->val_out = __sungem_phy_read(gp, data->phy_id & 0x1f,
+ data->reg_num & 0x1f);
+ rc = 0;
+ break;
+
+ case SIOCSMIIREG: /* Write MII PHY register. */
+ __sungem_phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f,
+ data->val_in);
+ rc = 0;
+ break;
+ }
+ return rc;
+}
+
+#if (!defined(CONFIG_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);
+}
+#endif /* not Sparc and not PPC */
+
+static int gem_get_device_address(struct gem *gp)
+{
+#if defined(CONFIG_SPARC) || defined(CONFIG_PPC_PMAC)
+ struct net_device *dev = gp->dev;
+ const unsigned char *addr;
+
+ addr = of_get_property(gp->of_node, "local-mac-address", NULL);
+ if (addr == NULL) {
+#ifdef CONFIG_SPARC
+ addr = idprom->id_ethaddr;
+#else
+ printk("\n");
+ pr_err("%s: can't get mac-address\n", dev->name);
+ return -1;
+#endif
+ }
+ eth_hw_addr_set(dev, addr);
+#else
+ u8 addr[ETH_ALEN];
+
+ get_gem_mac_nonobp(gp->pdev, addr);
+ eth_hw_addr_set(gp->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 = netdev_priv(dev);
+
+ unregister_netdev(dev);
+
+ /* Ensure reset task is truly gone */
+ cancel_work_sync(&gp->reset_task);
+
+ /* Free resources */
+ dma_free_coherent(&pdev->dev, sizeof(struct gem_init_block),
+ gp->init_block, gp->gblock_dvma);
+ iounmap(gp->regs);
+ pci_release_regions(pdev);
+ free_netdev(dev);
+ }
+}
+
+static const struct net_device_ops gem_netdev_ops = {
+ .ndo_open = gem_open,
+ .ndo_stop = gem_close,
+ .ndo_start_xmit = gem_start_xmit,
+ .ndo_get_stats = gem_get_stats,
+ .ndo_set_rx_mode = gem_set_multicast,
+ .ndo_eth_ioctl = gem_ioctl,
+ .ndo_tx_timeout = gem_tx_timeout,
+ .ndo_change_mtu = gem_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = gem_set_mac_address,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = gem_poll_controller,
+#endif
+};
+
+static int gem_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ unsigned long gemreg_base, gemreg_len;
+ struct net_device *dev;
+ struct gem *gp;
+ int err, pci_using_dac;
+
+ printk_once(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) {
+ pr_err("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 &&
+ !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
+ pci_using_dac = 1;
+ } else {
+ err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (err) {
+ pr_err("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) {
+ pr_err("Cannot find proper PCI device base address, aborting\n");
+ err = -ENODEV;
+ goto err_disable_device;
+ }
+
+ dev = alloc_etherdev(sizeof(*gp));
+ if (!dev) {
+ err = -ENOMEM;
+ goto err_disable_device;
+ }
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ gp = netdev_priv(dev);
+
+ err = pci_request_regions(pdev, DRV_NAME);
+ if (err) {
+ pr_err("Cannot obtain PCI resources, aborting\n");
+ goto err_out_free_netdev;
+ }
+
+ gp->pdev = pdev;
+ gp->dev = dev;
+
+ gp->msg_enable = DEFAULT_MSG;
+
+ timer_setup(&gp->link_timer, gem_link_timer, 0);
+
+ INIT_WORK(&gp->reset_task, gem_reset_task);
+
+ gp->lstate = link_down;
+ gp->timer_ticks = 0;
+ netif_carrier_off(dev);
+
+ gp->regs = ioremap(gemreg_base, gemreg_len);
+ if (!gp->regs) {
+ pr_err("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.
+ */
+#if defined(CONFIG_PPC_PMAC) || defined(CONFIG_SPARC)
+ 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 = _sungem_phy_read;
+ gp->phy_mii.mdio_write = _sungem_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 = dma_alloc_coherent(&pdev->dev, sizeof(struct gem_init_block),
+ &gp->gblock_dvma, GFP_KERNEL);
+ if (!gp->init_block) {
+ pr_err("Cannot allocate init block, aborting\n");
+ err = -ENOMEM;
+ goto err_out_iounmap;
+ }
+
+ err = gem_get_device_address(gp);
+ if (err)
+ goto err_out_free_consistent;
+
+ dev->netdev_ops = &gem_netdev_ops;
+ netif_napi_add(dev, &gp->napi, gem_poll);
+ dev->ethtool_ops = &gem_ethtool_ops;
+ dev->watchdog_timeo = 5 * HZ;
+ dev->dma = 0;
+
+ /* Set that now, in case PM kicks in now */
+ pci_set_drvdata(pdev, dev);
+
+ /* We can do scatter/gather and HW checksum */
+ dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
+ dev->features = dev->hw_features;
+ if (pci_using_dac)
+ dev->features |= NETIF_F_HIGHDMA;
+
+ /* MTU range: 68 - 1500 (Jumbo mode is broken) */
+ dev->min_mtu = GEM_MIN_MTU;
+ dev->max_mtu = GEM_MAX_MTU;
+
+ /* Register with kernel */
+ if (register_netdev(dev)) {
+ pr_err("Cannot register net device, aborting\n");
+ err = -ENOMEM;
+ goto err_out_free_consistent;
+ }
+
+ /* Undo the get_cell with appropriate locking (we could use
+ * ndo_init/uninit but that would be even more clumsy imho)
+ */
+ rtnl_lock();
+ gem_put_cell(gp);
+ rtnl_unlock();
+
+ netdev_info(dev, "Sun GEM (PCI) 10/100/1000BaseT Ethernet %pM\n",
+ dev->dev_addr);
+ 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 SIMPLE_DEV_PM_OPS(gem_pm_ops, gem_suspend, gem_resume);
+
+static struct pci_driver gem_driver = {
+ .name = GEM_MODULE_NAME,
+ .id_table = gem_pci_tbl,
+ .probe = gem_init_one,
+ .remove = gem_remove_one,
+ .driver.pm = &gem_pm_ops,
+};
+
+module_pci_driver(gem_driver);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 12:09:21 +0000