diff options
Diffstat (limited to 'drivers/net/jme.c')
| -rw-r--r-- | drivers/net/jme.c | 3038 |
1 files changed, 3038 insertions, 0 deletions
diff --git a/drivers/net/jme.c b/drivers/net/jme.c new file mode 100644 index 000000000000..81c6cdc3851f --- /dev/null +++ b/drivers/net/jme.c @@ -0,0 +1,3038 @@ +/* + * JMicron JMC2x0 series PCIe Ethernet Linux Device Driver + * + * Copyright 2008 JMicron Technology Corporation + * http://www.jmicron.com/ + * + * Author: Guo-Fu Tseng <cooldavid@cooldavid.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/crc32.h> +#include <linux/delay.h> +#include <linux/spinlock.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/tcp.h> +#include <linux/udp.h> +#include <linux/if_vlan.h> +#include <net/ip6_checksum.h> +#include "jme.h" + +static int force_pseudohp = -1; +static int no_pseudohp = -1; +static int no_extplug = -1; +module_param(force_pseudohp, int, 0); +MODULE_PARM_DESC(force_pseudohp, + "Enable pseudo hot-plug feature manually by driver instead of BIOS."); +module_param(no_pseudohp, int, 0); +MODULE_PARM_DESC(no_pseudohp, "Disable pseudo hot-plug feature."); +module_param(no_extplug, int, 0); +MODULE_PARM_DESC(no_extplug, + "Do not use external plug signal for pseudo hot-plug."); + +static int +jme_mdio_read(struct net_device *netdev, int phy, int reg) +{ + struct jme_adapter *jme = netdev_priv(netdev); + int i, val, again = (reg == MII_BMSR) ? 1 : 0; + +read_again: + jwrite32(jme, JME_SMI, SMI_OP_REQ | + smi_phy_addr(phy) | + smi_reg_addr(reg)); + + wmb(); + for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) { + udelay(20); + val = jread32(jme, JME_SMI); + if ((val & SMI_OP_REQ) == 0) + break; + } + + if (i == 0) { + jeprintk(jme->pdev, "phy(%d) read timeout : %d\n", phy, reg); + return 0; + } + + if (again--) + goto read_again; + + return (val & SMI_DATA_MASK) >> SMI_DATA_SHIFT; +} + +static void +jme_mdio_write(struct net_device *netdev, + int phy, int reg, int val) +{ + struct jme_adapter *jme = netdev_priv(netdev); + int i; + + jwrite32(jme, JME_SMI, SMI_OP_WRITE | SMI_OP_REQ | + ((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) | + smi_phy_addr(phy) | smi_reg_addr(reg)); + + wmb(); + for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) { + udelay(20); + if ((jread32(jme, JME_SMI) & SMI_OP_REQ) == 0) + break; + } + + if (i == 0) + jeprintk(jme->pdev, "phy(%d) write timeout : %d\n", phy, reg); + + return; +} + +static inline void +jme_reset_phy_processor(struct jme_adapter *jme) +{ + u32 val; + + jme_mdio_write(jme->dev, + jme->mii_if.phy_id, + MII_ADVERTISE, ADVERTISE_ALL | + ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); + + if (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) + jme_mdio_write(jme->dev, + jme->mii_if.phy_id, + MII_CTRL1000, + ADVERTISE_1000FULL | ADVERTISE_1000HALF); + + val = jme_mdio_read(jme->dev, + jme->mii_if.phy_id, + MII_BMCR); + + jme_mdio_write(jme->dev, + jme->mii_if.phy_id, + MII_BMCR, val | BMCR_RESET); + + return; +} + +static void +jme_setup_wakeup_frame(struct jme_adapter *jme, + u32 *mask, u32 crc, int fnr) +{ + int i; + + /* + * Setup CRC pattern + */ + jwrite32(jme, JME_WFOI, WFOI_CRC_SEL | (fnr & WFOI_FRAME_SEL)); + wmb(); + jwrite32(jme, JME_WFODP, crc); + wmb(); + + /* + * Setup Mask + */ + for (i = 0 ; i < WAKEUP_FRAME_MASK_DWNR ; ++i) { + jwrite32(jme, JME_WFOI, + ((i << WFOI_MASK_SHIFT) & WFOI_MASK_SEL) | + (fnr & WFOI_FRAME_SEL)); + wmb(); + jwrite32(jme, JME_WFODP, mask[i]); + wmb(); + } +} + +static inline void +jme_reset_mac_processor(struct jme_adapter *jme) +{ + u32 mask[WAKEUP_FRAME_MASK_DWNR] = {0, 0, 0, 0}; + u32 crc = 0xCDCDCDCD; + u32 gpreg0; + int i; + + jwrite32(jme, JME_GHC, jme->reg_ghc | GHC_SWRST); + udelay(2); + jwrite32(jme, JME_GHC, jme->reg_ghc); + + jwrite32(jme, JME_RXDBA_LO, 0x00000000); + jwrite32(jme, JME_RXDBA_HI, 0x00000000); + jwrite32(jme, JME_RXQDC, 0x00000000); + jwrite32(jme, JME_RXNDA, 0x00000000); + jwrite32(jme, JME_TXDBA_LO, 0x00000000); + jwrite32(jme, JME_TXDBA_HI, 0x00000000); + jwrite32(jme, JME_TXQDC, 0x00000000); + jwrite32(jme, JME_TXNDA, 0x00000000); + + jwrite32(jme, JME_RXMCHT_LO, 0x00000000); + jwrite32(jme, JME_RXMCHT_HI, 0x00000000); + for (i = 0 ; i < WAKEUP_FRAME_NR ; ++i) + jme_setup_wakeup_frame(jme, mask, crc, i); + if (jme->fpgaver) + gpreg0 = GPREG0_DEFAULT | GPREG0_LNKINTPOLL; + else + gpreg0 = GPREG0_DEFAULT; + jwrite32(jme, JME_GPREG0, gpreg0); + jwrite32(jme, JME_GPREG1, GPREG1_DEFAULT); +} + +static inline void +jme_reset_ghc_speed(struct jme_adapter *jme) +{ + jme->reg_ghc &= ~(GHC_SPEED_1000M | GHC_DPX); + jwrite32(jme, JME_GHC, jme->reg_ghc); +} + +static inline void +jme_clear_pm(struct jme_adapter *jme) +{ + jwrite32(jme, JME_PMCS, 0xFFFF0000 | jme->reg_pmcs); + pci_set_power_state(jme->pdev, PCI_D0); + pci_enable_wake(jme->pdev, PCI_D0, false); +} + +static int +jme_reload_eeprom(struct jme_adapter *jme) +{ + u32 val; + int i; + + val = jread32(jme, JME_SMBCSR); + + if (val & SMBCSR_EEPROMD) { + val |= SMBCSR_CNACK; + jwrite32(jme, JME_SMBCSR, val); + val |= SMBCSR_RELOAD; + jwrite32(jme, JME_SMBCSR, val); + mdelay(12); + + for (i = JME_EEPROM_RELOAD_TIMEOUT; i > 0; --i) { + mdelay(1); + if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0) + break; + } + + if (i == 0) { + jeprintk(jme->pdev, "eeprom reload timeout\n"); + return -EIO; + } + } + + return 0; +} + +static void +jme_load_macaddr(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + unsigned char macaddr[6]; + u32 val; + + spin_lock_bh(&jme->macaddr_lock); + val = jread32(jme, JME_RXUMA_LO); + macaddr[0] = (val >> 0) & 0xFF; + macaddr[1] = (val >> 8) & 0xFF; + macaddr[2] = (val >> 16) & 0xFF; + macaddr[3] = (val >> 24) & 0xFF; + val = jread32(jme, JME_RXUMA_HI); + macaddr[4] = (val >> 0) & 0xFF; + macaddr[5] = (val >> 8) & 0xFF; + memcpy(netdev->dev_addr, macaddr, 6); + spin_unlock_bh(&jme->macaddr_lock); +} + +static inline void +jme_set_rx_pcc(struct jme_adapter *jme, int p) +{ + switch (p) { + case PCC_OFF: + jwrite32(jme, JME_PCCRX0, + ((PCC_OFF_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) | + ((PCC_OFF_CNT << PCCRX_SHIFT) & PCCRX_MASK)); + break; + case PCC_P1: + jwrite32(jme, JME_PCCRX0, + ((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) | + ((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK)); + break; + case PCC_P2: + jwrite32(jme, JME_PCCRX0, + ((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) | + ((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK)); + break; + case PCC_P3: + jwrite32(jme, JME_PCCRX0, + ((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) | + ((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK)); + break; + default: + break; + } + wmb(); + + if (!(test_bit(JME_FLAG_POLL, &jme->flags))) + msg_rx_status(jme, "Switched to PCC_P%d\n", p); +} + +static void +jme_start_irq(struct jme_adapter *jme) +{ + register struct dynpcc_info *dpi = &(jme->dpi); + + jme_set_rx_pcc(jme, PCC_P1); + dpi->cur = PCC_P1; + dpi->attempt = PCC_P1; + dpi->cnt = 0; + + jwrite32(jme, JME_PCCTX, + ((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) | + ((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) | + PCCTXQ0_EN + ); + + /* + * Enable Interrupts + */ + jwrite32(jme, JME_IENS, INTR_ENABLE); +} + +static inline void +jme_stop_irq(struct jme_adapter *jme) +{ + /* + * Disable Interrupts + */ + jwrite32f(jme, JME_IENC, INTR_ENABLE); +} + +static inline void +jme_enable_shadow(struct jme_adapter *jme) +{ + jwrite32(jme, + JME_SHBA_LO, + ((u32)jme->shadow_dma & ~((u32)0x1F)) | SHBA_POSTEN); +} + +static inline void +jme_disable_shadow(struct jme_adapter *jme) +{ + jwrite32(jme, JME_SHBA_LO, 0x0); +} + +static u32 +jme_linkstat_from_phy(struct jme_adapter *jme) +{ + u32 phylink, bmsr; + + phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17); + bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR); + if (bmsr & BMSR_ANCOMP) + phylink |= PHY_LINK_AUTONEG_COMPLETE; + + return phylink; +} + +static inline void +jme_set_phyfifoa(struct jme_adapter *jme) +{ + jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004); +} + +static inline void +jme_set_phyfifob(struct jme_adapter *jme) +{ + jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000); +} + +static int +jme_check_link(struct net_device *netdev, int testonly) +{ + struct jme_adapter *jme = netdev_priv(netdev); + u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT, bmcr, gpreg1; + char linkmsg[64]; + int rc = 0; + + linkmsg[0] = '\0'; + + if (jme->fpgaver) + phylink = jme_linkstat_from_phy(jme); + else + phylink = jread32(jme, JME_PHY_LINK); + + if (phylink & PHY_LINK_UP) { + if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) { + /* + * If we did not enable AN + * Speed/Duplex Info should be obtained from SMI + */ + phylink = PHY_LINK_UP; + + bmcr = jme_mdio_read(jme->dev, + jme->mii_if.phy_id, + MII_BMCR); + + phylink |= ((bmcr & BMCR_SPEED1000) && + (bmcr & BMCR_SPEED100) == 0) ? + PHY_LINK_SPEED_1000M : + (bmcr & BMCR_SPEED100) ? + PHY_LINK_SPEED_100M : + PHY_LINK_SPEED_10M; + + phylink |= (bmcr & BMCR_FULLDPLX) ? + PHY_LINK_DUPLEX : 0; + + strcat(linkmsg, "Forced: "); + } else { + /* + * Keep polling for speed/duplex resolve complete + */ + while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) && + --cnt) { + + udelay(1); + + if (jme->fpgaver) + phylink = jme_linkstat_from_phy(jme); + else + phylink = jread32(jme, JME_PHY_LINK); + } + if (!cnt) + jeprintk(jme->pdev, + "Waiting speed resolve timeout.\n"); + + strcat(linkmsg, "ANed: "); + } + + if (jme->phylink == phylink) { + rc = 1; + goto out; + } + if (testonly) + goto out; + + jme->phylink = phylink; + + ghc = jme->reg_ghc & ~(GHC_SPEED_10M | + GHC_SPEED_100M | + GHC_SPEED_1000M | + GHC_DPX); + switch (phylink & PHY_LINK_SPEED_MASK) { + case PHY_LINK_SPEED_10M: + ghc |= GHC_SPEED_10M; + strcat(linkmsg, "10 Mbps, "); + break; + case PHY_LINK_SPEED_100M: + ghc |= GHC_SPEED_100M; + strcat(linkmsg, "100 Mbps, "); + break; + case PHY_LINK_SPEED_1000M: + ghc |= GHC_SPEED_1000M; + strcat(linkmsg, "1000 Mbps, "); + break; + default: + break; + } + + if (phylink & PHY_LINK_DUPLEX) { + jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT); + ghc |= GHC_DPX; + } else { + jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT | + TXMCS_BACKOFF | + TXMCS_CARRIERSENSE | + TXMCS_COLLISION); + jwrite32(jme, JME_TXTRHD, TXTRHD_TXPEN | + ((0x2000 << TXTRHD_TXP_SHIFT) & TXTRHD_TXP) | + TXTRHD_TXREN | + ((8 << TXTRHD_TXRL_SHIFT) & TXTRHD_TXRL)); + } + strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ? + "Full-Duplex, " : + "Half-Duplex, "); + + if (phylink & PHY_LINK_MDI_STAT) + strcat(linkmsg, "MDI-X"); + else + strcat(linkmsg, "MDI"); + + gpreg1 = GPREG1_DEFAULT; + if (is_buggy250(jme->pdev->device, jme->chiprev)) { + if (!(phylink & PHY_LINK_DUPLEX)) + gpreg1 |= GPREG1_HALFMODEPATCH; + switch (phylink & PHY_LINK_SPEED_MASK) { + case PHY_LINK_SPEED_10M: + jme_set_phyfifoa(jme); + gpreg1 |= GPREG1_RSSPATCH; + break; + case PHY_LINK_SPEED_100M: + jme_set_phyfifob(jme); + gpreg1 |= GPREG1_RSSPATCH; + break; + case PHY_LINK_SPEED_1000M: + jme_set_phyfifoa(jme); + break; + default: + break; + } + } + jwrite32(jme, JME_GPREG1, gpreg1); + + jme->reg_ghc = ghc; + jwrite32(jme, JME_GHC, ghc); + + msg_link(jme, "Link is up at %s.\n", linkmsg); + netif_carrier_on(netdev); + } else { + if (testonly) + goto out; + + msg_link(jme, "Link is down.\n"); + jme->phylink = 0; + netif_carrier_off(netdev); + } + +out: + return rc; +} + +static int +jme_setup_tx_resources(struct jme_adapter *jme) +{ + struct jme_ring *txring = &(jme->txring[0]); + + txring->alloc = dma_alloc_coherent(&(jme->pdev->dev), + TX_RING_ALLOC_SIZE(jme->tx_ring_size), + &(txring->dmaalloc), + GFP_ATOMIC); + + if (!txring->alloc) { + txring->desc = NULL; + txring->dmaalloc = 0; + txring->dma = 0; + return -ENOMEM; + } + + /* + * 16 Bytes align + */ + txring->desc = (void *)ALIGN((unsigned long)(txring->alloc), + RING_DESC_ALIGN); + txring->dma = ALIGN(txring->dmaalloc, RING_DESC_ALIGN); + txring->next_to_use = 0; + atomic_set(&txring->next_to_clean, 0); + atomic_set(&txring->nr_free, jme->tx_ring_size); + + /* + * Initialize Transmit Descriptors + */ + memset(txring->alloc, 0, TX_RING_ALLOC_SIZE(jme->tx_ring_size)); + memset(txring->bufinf, 0, + sizeof(struct jme_buffer_info) * jme->tx_ring_size); + + return 0; +} + +static void +jme_free_tx_resources(struct jme_adapter *jme) +{ + int i; + struct jme_ring *txring = &(jme->txring[0]); + struct jme_buffer_info *txbi = txring->bufinf; + + if (txring->alloc) { + for (i = 0 ; i < jme->tx_ring_size ; ++i) { + txbi = txring->bufinf + i; + if (txbi->skb) { + dev_kfree_skb(txbi->skb); + txbi->skb = NULL; + } + txbi->mapping = 0; + txbi->len = 0; + txbi->nr_desc = 0; + txbi->start_xmit = 0; + } + + dma_free_coherent(&(jme->pdev->dev), + TX_RING_ALLOC_SIZE(jme->tx_ring_size), + txring->alloc, + txring->dmaalloc); + + txring->alloc = NULL; + txring->desc = NULL; + txring->dmaalloc = 0; + txring->dma = 0; + } + txring->next_to_use = 0; + atomic_set(&txring->next_to_clean, 0); + atomic_set(&txring->nr_free, 0); + +} + +static inline void +jme_enable_tx_engine(struct jme_adapter *jme) +{ + /* + * Select Queue 0 + */ + jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0); + wmb(); + + /* + * Setup TX Queue 0 DMA Bass Address + */ + jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL); + jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32); + jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL); + + /* + * Setup TX Descptor Count + */ + jwrite32(jme, JME_TXQDC, jme->tx_ring_size); + + /* + * Enable TX Engine + */ + wmb(); + jwrite32(jme, JME_TXCS, jme->reg_txcs | + TXCS_SELECT_QUEUE0 | + TXCS_ENABLE); + +} + +static inline void +jme_restart_tx_engine(struct jme_adapter *jme) +{ + /* + * Restart TX Engine + */ + jwrite32(jme, JME_TXCS, jme->reg_txcs | + TXCS_SELECT_QUEUE0 | + TXCS_ENABLE); +} + +static inline void +jme_disable_tx_engine(struct jme_adapter *jme) +{ + int i; + u32 val; + + /* + * Disable TX Engine + */ + jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0); + wmb(); + + val = jread32(jme, JME_TXCS); + for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) { + mdelay(1); + val = jread32(jme, JME_TXCS); + rmb(); + } + + if (!i) + jeprintk(jme->pdev, "Disable TX engine timeout.\n"); +} + +static void +jme_set_clean_rxdesc(struct jme_adapter *jme, int i) +{ + struct jme_ring *rxring = jme->rxring; + register struct rxdesc *rxdesc = rxring->desc; + struct jme_buffer_info *rxbi = rxring->bufinf; + rxdesc += i; + rxbi += i; + + rxdesc->dw[0] = 0; + rxdesc->dw[1] = 0; + rxdesc->desc1.bufaddrh = cpu_to_le32((__u64)rxbi->mapping >> 32); + rxdesc->desc1.bufaddrl = cpu_to_le32( + (__u64)rxbi->mapping & 0xFFFFFFFFUL); + rxdesc->desc1.datalen = cpu_to_le16(rxbi->len); + if (jme->dev->features & NETIF_F_HIGHDMA) + rxdesc->desc1.flags = RXFLAG_64BIT; + wmb(); + rxdesc->desc1.flags |= RXFLAG_OWN | RXFLAG_INT; +} + +static int +jme_make_new_rx_buf(struct jme_adapter *jme, int i) +{ + struct jme_ring *rxring = &(jme->rxring[0]); + struct jme_buffer_info *rxbi = rxring->bufinf + i; + struct sk_buff *skb; + + skb = netdev_alloc_skb(jme->dev, + jme->dev->mtu + RX_EXTRA_LEN); + if (unlikely(!skb)) + return -ENOMEM; + + rxbi->skb = skb; + rxbi->len = skb_tailroom(skb); + rxbi->mapping = pci_map_page(jme->pdev, + virt_to_page(skb->data), + offset_in_page(skb->data), + rxbi->len, + PCI_DMA_FROMDEVICE); + + return 0; +} + +static void +jme_free_rx_buf(struct jme_adapter *jme, int i) +{ + struct jme_ring *rxring = &(jme->rxring[0]); + struct jme_buffer_info *rxbi = rxring->bufinf; + rxbi += i; + + if (rxbi->skb) { + pci_unmap_page(jme->pdev, + rxbi->mapping, + rxbi->len, + PCI_DMA_FROMDEVICE); + dev_kfree_skb(rxbi->skb); + rxbi->skb = NULL; + rxbi->mapping = 0; + rxbi->len = 0; + } +} + +static void +jme_free_rx_resources(struct jme_adapter *jme) +{ + int i; + struct jme_ring *rxring = &(jme->rxring[0]); + + if (rxring->alloc) { + for (i = 0 ; i < jme->rx_ring_size ; ++i) + jme_free_rx_buf(jme, i); + + dma_free_coherent(&(jme->pdev->dev), + RX_RING_ALLOC_SIZE(jme->rx_ring_size), + rxring->alloc, + rxring->dmaalloc); + rxring->alloc = NULL; + rxring->desc = NULL; + rxring->dmaalloc = 0; + rxring->dma = 0; + } + rxring->next_to_use = 0; + atomic_set(&rxring->next_to_clean, 0); +} + +static int +jme_setup_rx_resources(struct jme_adapter *jme) +{ + int i; + struct jme_ring *rxring = &(jme->rxring[0]); + + rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev), + RX_RING_ALLOC_SIZE(jme->rx_ring_size), + &(rxring->dmaalloc), + GFP_ATOMIC); + if (!rxring->alloc) { + rxring->desc = NULL; + rxring->dmaalloc = 0; + rxring->dma = 0; + return -ENOMEM; + } + + /* + * 16 Bytes align + */ + rxring->desc = (void *)ALIGN((unsigned long)(rxring->alloc), + RING_DESC_ALIGN); + rxring->dma = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN); + rxring->next_to_use = 0; + atomic_set(&rxring->next_to_clean, 0); + + /* + * Initiallize Receive Descriptors + */ + for (i = 0 ; i < jme->rx_ring_size ; ++i) { + if (unlikely(jme_make_new_rx_buf(jme, i))) { + jme_free_rx_resources(jme); + return -ENOMEM; + } + + jme_set_clean_rxdesc(jme, i); + } + + return 0; +} + +static inline void +jme_enable_rx_engine(struct jme_adapter *jme) +{ + /* + * Select Queue 0 + */ + jwrite32(jme, JME_RXCS, jme->reg_rxcs | + RXCS_QUEUESEL_Q0); + wmb(); + + /* + * Setup RX DMA Bass Address + */ + jwrite32(jme, JME_RXDBA_LO, (__u64)jme->rxring[0].dma & 0xFFFFFFFFUL); + jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32); + jwrite32(jme, JME_RXNDA, (__u64)jme->rxring[0].dma & 0xFFFFFFFFUL); + + /* + * Setup RX Descriptor Count + */ + jwrite32(jme, JME_RXQDC, jme->rx_ring_size); + + /* + * Setup Unicast Filter + */ + jme_set_multi(jme->dev); + + /* + * Enable RX Engine + */ + wmb(); + jwrite32(jme, JME_RXCS, jme->reg_rxcs | + RXCS_QUEUESEL_Q0 | + RXCS_ENABLE | + RXCS_QST); +} + +static inline void +jme_restart_rx_engine(struct jme_adapter *jme) +{ + /* + * Start RX Engine + */ + jwrite32(jme, JME_RXCS, jme->reg_rxcs | + RXCS_QUEUESEL_Q0 | + RXCS_ENABLE | + RXCS_QST); +} + +static inline void +jme_disable_rx_engine(struct jme_adapter *jme) +{ + int i; + u32 val; + + /* + * Disable RX Engine + */ + jwrite32(jme, JME_RXCS, jme->reg_rxcs); + wmb(); + + val = jread32(jme, JME_RXCS); + for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) { + mdelay(1); + val = jread32(jme, JME_RXCS); + rmb(); + } + + if (!i) + jeprintk(jme->pdev, "Disable RX engine timeout.\n"); + +} + +static int +jme_rxsum_ok(struct jme_adapter *jme, u16 flags) +{ + if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4))) + return false; + + if (unlikely(!(flags & RXWBFLAG_MF) && + (flags & RXWBFLAG_TCPON) && !(flags & RXWBFLAG_TCPCS))) { + msg_rx_err(jme, "TCP Checksum error.\n"); + goto out_sumerr; + } + + if (unlikely(!(flags & RXWBFLAG_MF) && + (flags & RXWBFLAG_UDPON) && !(flags & RXWBFLAG_UDPCS))) { + msg_rx_err(jme, "UDP Checksum error.\n"); + goto out_sumerr; + } + + if (unlikely((flags & RXWBFLAG_IPV4) && !(flags & RXWBFLAG_IPCS))) { + msg_rx_err(jme, "IPv4 Checksum error.\n"); + goto out_sumerr; + } + + return true; + +out_sumerr: + return false; +} + +static void +jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx) +{ + struct jme_ring *rxring = &(jme->rxring[0]); + struct rxdesc *rxdesc = rxring->desc; + struct jme_buffer_info *rxbi = rxring->bufinf; + struct sk_buff *skb; + int framesize; + + rxdesc += idx; + rxbi += idx; + + skb = rxbi->skb; + pci_dma_sync_single_for_cpu(jme->pdev, + rxbi->mapping, + rxbi->len, + PCI_DMA_FROMDEVICE); + + if (unlikely(jme_make_new_rx_buf(jme, idx))) { + pci_dma_sync_single_for_device(jme->pdev, + rxbi->mapping, + rxbi->len, + PCI_DMA_FROMDEVICE); + + ++(NET_STAT(jme).rx_dropped); + } else { + framesize = le16_to_cpu(rxdesc->descwb.framesize) + - RX_PREPAD_SIZE; + + skb_reserve(skb, RX_PREPAD_SIZE); + skb_put(skb, framesize); + skb->protocol = eth_type_trans(skb, jme->dev); + + if (jme_rxsum_ok(jme, rxdesc->descwb.flags)) + skb->ip_summed = CHECKSUM_UNNECESSARY; + else + skb->ip_summed = CHECKSUM_NONE; + + if (rxdesc->descwb.flags & RXWBFLAG_TAGON) { + if (jme->vlgrp) { + jme->jme_vlan_rx(skb, jme->vlgrp, + le32_to_cpu(rxdesc->descwb.vlan)); + NET_STAT(jme).rx_bytes += 4; + } + } else { + jme->jme_rx(skb); + } + + if ((le16_to_cpu(rxdesc->descwb.flags) & RXWBFLAG_DEST) == + RXWBFLAG_DEST_MUL) + ++(NET_STAT(jme).multicast); + + jme->dev->last_rx = jiffies; + NET_STAT(jme).rx_bytes += framesize; + ++(NET_STAT(jme).rx_packets); + } + + jme_set_clean_rxdesc(jme, idx); + +} + +static int +jme_process_receive(struct jme_adapter *jme, int limit) +{ + struct jme_ring *rxring = &(jme->rxring[0]); + struct rxdesc *rxdesc = rxring->desc; + int i, j, ccnt, desccnt, mask = jme->rx_ring_mask; + + if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning))) + goto out_inc; + + if (unlikely(atomic_read(&jme->link_changing) != 1)) + goto out_inc; + + if (unlikely(!netif_carrier_ok(jme->dev))) + goto out_inc; + + i = atomic_read(&rxring->next_to_clean); + while (limit-- > 0) { + rxdesc = rxring->desc; + rxdesc += i; + + if ((rxdesc->descwb.flags & RXWBFLAG_OWN) || + !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL)) + goto out; + + desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT; + + if (unlikely(desccnt > 1 || + rxdesc->descwb.errstat & RXWBERR_ALLERR)) { + + if (rxdesc->descwb.errstat & RXWBERR_CRCERR) + ++(NET_STAT(jme).rx_crc_errors); + else if (rxdesc->descwb.errstat & RXWBERR_OVERUN) + ++(NET_STAT(jme).rx_fifo_errors); + else + ++(NET_STAT(jme).rx_errors); + + if (desccnt > 1) + limit -= desccnt - 1; + + for (j = i, ccnt = desccnt ; ccnt-- ; ) { + jme_set_clean_rxdesc(jme, j); + j = (j + 1) & (mask); + } + + } else { + jme_alloc_and_feed_skb(jme, i); + } + + i = (i + desccnt) & (mask); + } + +out: + atomic_set(&rxring->next_to_clean, i); + +out_inc: + atomic_inc(&jme->rx_cleaning); + + return limit > 0 ? limit : 0; + +} + +static void +jme_attempt_pcc(struct dynpcc_info *dpi, int atmp) +{ + if (likely(atmp == dpi->cur)) { + dpi->cnt = 0; + return; + } + + if (dpi->attempt == atmp) { + ++(dpi->cnt); + } else { + dpi->attempt = atmp; + dpi->cnt = 0; + } + +} + +static void +jme_dynamic_pcc(struct jme_adapter *jme) +{ + register struct dynpcc_info *dpi = &(jme->dpi); + + if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD) + jme_attempt_pcc(dpi, PCC_P3); + else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD + || dpi->intr_cnt > PCC_INTR_THRESHOLD) + jme_attempt_pcc(dpi, PCC_P2); + else + jme_attempt_pcc(dpi, PCC_P1); + + if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) { + if (dpi->attempt < dpi->cur) + tasklet_schedule(&jme->rxclean_task); + jme_set_rx_pcc(jme, dpi->attempt); + dpi->cur = dpi->attempt; + dpi->cnt = 0; + } +} + +static void +jme_start_pcc_timer(struct jme_adapter *jme) +{ + struct dynpcc_info *dpi = &(jme->dpi); + dpi->last_bytes = NET_STAT(jme).rx_bytes; + dpi->last_pkts = NET_STAT(jme).rx_packets; + dpi->intr_cnt = 0; + jwrite32(jme, JME_TMCSR, + TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT)); +} + +static inline void +jme_stop_pcc_timer(struct jme_adapter *jme) +{ + jwrite32(jme, JME_TMCSR, 0); +} + +static void +jme_shutdown_nic(struct jme_adapter *jme) +{ + u32 phylink; + + phylink = jme_linkstat_from_phy(jme); + + if (!(phylink & PHY_LINK_UP)) { + /* + * Disable all interrupt before issue timer + */ + jme_stop_irq(jme); + jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE); + } +} + +static void +jme_pcc_tasklet(unsigned long arg) +{ + struct jme_adapter *jme = (struct jme_adapter *)arg; + struct net_device *netdev = jme->dev; + + if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) { + jme_shutdown_nic(jme); + return; + } + + if (unlikely(!netif_carrier_ok(netdev) || + (atomic_read(&jme->link_changing) != 1) + )) { + jme_stop_pcc_timer(jme); + return; + } + + if (!(test_bit(JME_FLAG_POLL, &jme->flags))) + jme_dynamic_pcc(jme); + + jme_start_pcc_timer(jme); +} + +static inline void +jme_polling_mode(struct jme_adapter *jme) +{ + jme_set_rx_pcc(jme, PCC_OFF); +} + +static inline void +jme_interrupt_mode(struct jme_adapter *jme) +{ + jme_set_rx_pcc(jme, PCC_P1); +} + +static inline int +jme_pseudo_hotplug_enabled(struct jme_adapter *jme) +{ + u32 apmc; + apmc = jread32(jme, JME_APMC); + return apmc & JME_APMC_PSEUDO_HP_EN; +} + +static void +jme_start_shutdown_timer(struct jme_adapter *jme) +{ + u32 apmc; + + apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN; + apmc &= ~JME_APMC_EPIEN_CTRL; + if (!no_extplug) { + jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN); + wmb(); + } + jwrite32f(jme, JME_APMC, apmc); + + jwrite32f(jme, JME_TIMER2, 0); + set_bit(JME_FLAG_SHUTDOWN, &jme->flags); + jwrite32(jme, JME_TMCSR, + TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT)); +} + +static void +jme_stop_shutdown_timer(struct jme_adapter *jme) +{ + u32 apmc; + + jwrite32f(jme, JME_TMCSR, 0); + jwrite32f(jme, JME_TIMER2, 0); + clear_bit(JME_FLAG_SHUTDOWN, &jme->flags); + + apmc = jread32(jme, JME_APMC); + apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL); + jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS); + wmb(); + jwrite32f(jme, JME_APMC, apmc); +} + +static void +jme_link_change_tasklet(unsigned long arg) +{ + struct jme_adapter *jme = (struct jme_adapter *)arg; + struct net_device *netdev = jme->dev; + int rc; + + while (!atomic_dec_and_test(&jme->link_changing)) { + atomic_inc(&jme->link_changing); + msg_intr(jme, "Get link change lock failed.\n"); + while (atomic_read(&jme->link_changing) != 1) + msg_intr(jme, "Waiting link change lock.\n"); + } + + if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu) + goto out; + + jme->old_mtu = netdev->mtu; + netif_stop_queue(netdev); + if (jme_pseudo_hotplug_enabled(jme)) + jme_stop_shutdown_timer(jme); + + jme_stop_pcc_timer(jme); + tasklet_disable(&jme->txclean_task); + tasklet_disable(&jme->rxclean_task); + tasklet_disable(&jme->rxempty_task); + + if (netif_carrier_ok(netdev)) { + jme_reset_ghc_speed(jme); + jme_disable_rx_engine(jme); + jme_disable_tx_engine(jme); + jme_reset_mac_processor(jme); + jme_free_rx_resources(jme); + jme_free_tx_resources(jme); + + if (test_bit(JME_FLAG_POLL, &jme->flags)) + jme_polling_mode(jme); + + netif_carrier_off(netdev); + } + + jme_check_link(netdev, 0); + if (netif_carrier_ok(netdev)) { + rc = jme_setup_rx_resources(jme); + if (rc) { + jeprintk(jme->pdev, "Allocating resources for RX error" + ", Device STOPPED!\n"); + goto out_enable_tasklet; + } + + rc = jme_setup_tx_resources(jme); + if (rc) { + jeprintk(jme->pdev, "Allocating resources for TX error" + ", Device STOPPED!\n"); + goto err_out_free_rx_resources; + } + + jme_enable_rx_engine(jme); + jme_enable_tx_engine(jme); + + netif_start_queue(netdev); + + if (test_bit(JME_FLAG_POLL, &jme->flags)) + jme_interrupt_mode(jme); + + jme_start_pcc_timer(jme); + } else if (jme_pseudo_hotplug_enabled(jme)) { + jme_start_shutdown_timer(jme); + } + + goto out_enable_tasklet; + +err_out_free_rx_resources: + jme_free_rx_resources(jme); +out_enable_tasklet: + tasklet_enable(&jme->txclean_task); + tasklet_hi_enable(&jme->rxclean_task); + tasklet_hi_enable(&jme->rxempty_task); +out: + atomic_inc(&jme->link_changing); +} + +static void +jme_rx_clean_tasklet(unsigned long arg) +{ + struct jme_adapter *jme = (struct jme_adapter *)arg; + struct dynpcc_info *dpi = &(jme->dpi); + + jme_process_receive(jme, jme->rx_ring_size); + ++(dpi->intr_cnt); + +} + +static int +jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget)) +{ + struct jme_adapter *jme = jme_napi_priv(holder); + struct net_device *netdev = jme->dev; + int rest; + + rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget)); + + while (atomic_read(&jme->rx_empty) > 0) { + atomic_dec(&jme->rx_empty); + ++(NET_STAT(jme).rx_dropped); + jme_restart_rx_engine(jme); + } + atomic_inc(&jme->rx_empty); + + if (rest) { + JME_RX_COMPLETE(netdev, holder); + jme_interrupt_mode(jme); + } + + JME_NAPI_WEIGHT_SET(budget, rest); + return JME_NAPI_WEIGHT_VAL(budget) - rest; +} + +static void +jme_rx_empty_tasklet(unsigned long arg) +{ + struct jme_adapter *jme = (struct jme_adapter *)arg; + + if (unlikely(atomic_read(&jme->link_changing) != 1)) + return; + + if (unlikely(!netif_carrier_ok(jme->dev))) + return; + + msg_rx_status(jme, "RX Queue Full!\n"); + + jme_rx_clean_tasklet(arg); + + while (atomic_read(&jme->rx_empty) > 0) { + atomic_dec(&jme->rx_empty); + ++(NET_STAT(jme).rx_dropped); + jme_restart_rx_engine(jme); + } + atomic_inc(&jme->rx_empty); +} + +static void +jme_wake_queue_if_stopped(struct jme_adapter *jme) +{ + struct jme_ring *txring = jme->txring; + + smp_wmb(); + if (unlikely(netif_queue_stopped(jme->dev) && + atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) { + msg_tx_done(jme, "TX Queue Waked.\n"); + netif_wake_queue(jme->dev); + } + +} + +static void +jme_tx_clean_tasklet(unsigned long arg) +{ + struct jme_adapter *jme = (struct jme_adapter *)arg; + struct jme_ring *txring = &(jme->txring[0]); + struct txdesc *txdesc = txring->desc; + struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi; + int i, j, cnt = 0, max, err, mask; + + tx_dbg(jme, "Into txclean.\n"); + + if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning))) + goto out; + + if (unlikely(atomic_read(&jme->link_changing) != 1)) + goto out; + + if (unlikely(!netif_carrier_ok(jme->dev))) + goto out; + + max = jme->tx_ring_size - atomic_read(&txring->nr_free); + mask = jme->tx_ring_mask; + + for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) { + + ctxbi = txbi + i; + + if (likely(ctxbi->skb && + !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) { + + tx_dbg(jme, "txclean: %d+%d@%lu\n", + i, ctxbi->nr_desc, jiffies); + + err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR; + + for (j = 1 ; j < ctxbi->nr_desc ; ++j) { + ttxbi = txbi + ((i + j) & (mask)); + txdesc[(i + j) & (mask)].dw[0] = 0; + + pci_unmap_page(jme->pdev, + ttxbi->mapping, + ttxbi->len, + PCI_DMA_TODEVICE); + + ttxbi->mapping = 0; + ttxbi->len = 0; + } + + dev_kfree_skb(ctxbi->skb); + + cnt += ctxbi->nr_desc; + + if (unlikely(err)) { + ++(NET_STAT(jme).tx_carrier_errors); + } else { + ++(NET_STAT(jme).tx_packets); + NET_STAT(jme).tx_bytes += ctxbi->len; + } + + ctxbi->skb = NULL; + ctxbi->len = 0; + ctxbi->start_xmit = 0; + + } else { + break; + } + + i = (i + ctxbi->nr_desc) & mask; + + ctxbi->nr_desc = 0; + } + + tx_dbg(jme, "txclean: done %d@%lu.\n", i, jiffies); + atomic_set(&txring->next_to_clean, i); + atomic_add(cnt, &txring->nr_free); + + jme_wake_queue_if_stopped(jme); + +out: + atomic_inc(&jme->tx_cleaning); +} + +static void +jme_intr_msi(struct jme_adapter *jme, u32 intrstat) +{ + /* + * Disable interrupt + */ + jwrite32f(jme, JME_IENC, INTR_ENABLE); + + if (intrstat & (INTR_LINKCH | INTR_SWINTR)) { + /* + * Link change event is critical + * all other events are ignored + */ + jwrite32(jme, JME_IEVE, intrstat); + tasklet_schedule(&jme->linkch_task); + goto out_reenable; + } + + if (intrstat & INTR_TMINTR) { + jwrite32(jme, JME_IEVE, INTR_TMINTR); + tasklet_schedule(&jme->pcc_task); + } + + if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) { + jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0); + tasklet_schedule(&jme->txclean_task); + } + + if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) { + jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO | + INTR_PCCRX0 | + INTR_RX0EMP)) | + INTR_RX0); + } + + if (test_bit(JME_FLAG_POLL, &jme->flags)) { + if (intrstat & INTR_RX0EMP) + atomic_inc(&jme->rx_empty); + + if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) { + if (likely(JME_RX_SCHEDULE_PREP(jme))) { + jme_polling_mode(jme); + JME_RX_SCHEDULE(jme); + } + } + } else { + if (intrstat & INTR_RX0EMP) { + atomic_inc(&jme->rx_empty); + tasklet_hi_schedule(&jme->rxempty_task); + } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) { + tasklet_hi_schedule(&jme->rxclean_task); + } + } + +out_reenable: + /* + * Re-enable interrupt + */ + jwrite32f(jme, JME_IENS, INTR_ENABLE); +} + +static irqreturn_t +jme_intr(int irq, void *dev_id) +{ + struct net_device *netdev = dev_id; + struct jme_adapter *jme = netdev_priv(netdev); + u32 intrstat; + + intrstat = jread32(jme, JME_IEVE); + + /* + * Check if it's really an interrupt for us + */ + if (unlikely((intrstat & INTR_ENABLE) == 0)) + return IRQ_NONE; + + /* + * Check if the device still exist + */ + if (unlikely(intrstat == ~((typeof(intrstat))0))) + return IRQ_NONE; + + jme_intr_msi(jme, intrstat); + + return IRQ_HANDLED; +} + +static irqreturn_t +jme_msi(int irq, void *dev_id) +{ + struct net_device *netdev = dev_id; + struct jme_adapter *jme = netdev_priv(netdev); + u32 intrstat; + + pci_dma_sync_single_for_cpu(jme->pdev, + jme->shadow_dma, + sizeof(u32) * SHADOW_REG_NR, + PCI_DMA_FROMDEVICE); + intrstat = jme->shadow_regs[SHADOW_IEVE]; + jme->shadow_regs[SHADOW_IEVE] = 0; + + jme_intr_msi(jme, intrstat); + + return IRQ_HANDLED; +} + +static void +jme_reset_link(struct jme_adapter *jme) +{ + jwrite32(jme, JME_TMCSR, TMCSR_SWIT); +} + +static void +jme_restart_an(struct jme_adapter *jme) +{ + u32 bmcr; + + spin_lock_bh(&jme->phy_lock); + bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR); + bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART); + jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr); + spin_unlock_bh(&jme->phy_lock); +} + +static int +jme_request_irq(struct jme_adapter *jme) +{ + int rc; + struct net_device *netdev = jme->dev; + irq_handler_t handler = jme_intr; + int irq_flags = IRQF_SHARED; + + if (!pci_enable_msi(jme->pdev)) { + set_bit(JME_FLAG_MSI, &jme->flags); + handler = jme_msi; + irq_flags = 0; + } + + rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name, + netdev); + if (rc) { + jeprintk(jme->pdev, + "Unable to request %s interrupt (return: %d)\n", + test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx", + rc); + + if (test_bit(JME_FLAG_MSI, &jme->flags)) { + pci_disable_msi(jme->pdev); + clear_bit(JME_FLAG_MSI, &jme->flags); + } + } else { + netdev->irq = jme->pdev->irq; + } + + return rc; +} + +static void +jme_free_irq(struct jme_adapter *jme) +{ + free_irq(jme->pdev->irq, jme->dev); + if (test_bit(JME_FLAG_MSI, &jme->flags)) { + pci_disable_msi(jme->pdev); + clear_bit(JME_FLAG_MSI, &jme->flags); + jme->dev->irq = jme->pdev->irq; + } +} + +static int +jme_open(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + int rc; + + jme_clear_pm(jme); + JME_NAPI_ENABLE(jme); + + tasklet_enable(&jme->txclean_task); + tasklet_hi_enable(&jme->rxclean_task); + tasklet_hi_enable(&jme->rxempty_task); + + rc = jme_request_irq(jme); + if (rc) + goto err_out; + + jme_enable_shadow(jme); + jme_start_irq(jme); + + if (test_bit(JME_FLAG_SSET, &jme->flags)) + jme_set_settings(netdev, &jme->old_ecmd); + else + jme_reset_phy_processor(jme); + + jme_reset_link(jme); + + return 0; + +err_out: + netif_stop_queue(netdev); + netif_carrier_off(netdev); + return rc; +} + +#ifdef CONFIG_PM +static void +jme_set_100m_half(struct jme_adapter *jme) +{ + u32 bmcr, tmp; + + bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR); + tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 | + BMCR_SPEED1000 | BMCR_FULLDPLX); + tmp |= BMCR_SPEED100; + + if (bmcr != tmp) + jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp); + + if (jme->fpgaver) + jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL); + else + jwrite32(jme, JME_GHC, GHC_SPEED_100M); +} + +#define JME_WAIT_LINK_TIME 2000 /* 2000ms */ +static void +jme_wait_link(struct jme_adapter *jme) +{ + u32 phylink, to = JME_WAIT_LINK_TIME; + + mdelay(1000); + phylink = jme_linkstat_from_phy(jme); + while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) { + mdelay(10); + phylink = jme_linkstat_from_phy(jme); + } +} +#endif + +static inline void +jme_phy_off(struct jme_adapter *jme) +{ + jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, BMCR_PDOWN); +} + +static int +jme_close(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + netif_stop_queue(netdev); + netif_carrier_off(netdev); + + jme_stop_irq(jme); + jme_disable_shadow(jme); + jme_free_irq(jme); + + JME_NAPI_DISABLE(jme); + + tasklet_kill(&jme->linkch_task); + tasklet_kill(&jme->txclean_task); + tasklet_kill(&jme->rxclean_task); + tasklet_kill(&jme->rxempty_task); + + jme_reset_ghc_speed(jme); + jme_disable_rx_engine(jme); + jme_disable_tx_engine(jme); + jme_reset_mac_processor(jme); + jme_free_rx_resources(jme); + jme_free_tx_resources(jme); + jme->phylink = 0; + jme_phy_off(jme); + + return 0; +} + +static int +jme_alloc_txdesc(struct jme_adapter *jme, + struct sk_buff *skb) +{ + struct jme_ring *txring = jme->txring; + int idx, nr_alloc, mask = jme->tx_ring_mask; + + idx = txring->next_to_use; + nr_alloc = skb_shinfo(skb)->nr_frags + 2; + + if (unlikely(atomic_read(&txring->nr_free) < nr_alloc)) + return -1; + + atomic_sub(nr_alloc, &txring->nr_free); + + txring->next_to_use = (txring->next_to_use + nr_alloc) & mask; + + return idx; +} + +static void +jme_fill_tx_map(struct pci_dev *pdev, + struct txdesc *txdesc, + struct jme_buffer_info *txbi, + struct page *page, + u32 page_offset, + u32 len, + u8 hidma) +{ + dma_addr_t dmaaddr; + + dmaaddr = pci_map_page(pdev, + page, + page_offset, + len, + PCI_DMA_TODEVICE); + + pci_dma_sync_single_for_device(pdev, + dmaaddr, + len, + PCI_DMA_TODEVICE); + + txdesc->dw[0] = 0; + txdesc->dw[1] = 0; + txdesc->desc2.flags = TXFLAG_OWN; + txdesc->desc2.flags |= (hidma) ? TXFLAG_64BIT : 0; + txdesc->desc2.datalen = cpu_to_le16(len); + txdesc->desc2.bufaddrh = cpu_to_le32((__u64)dmaaddr >> 32); + txdesc->desc2.bufaddrl = cpu_to_le32( + (__u64)dmaaddr & 0xFFFFFFFFUL); + + txbi->mapping = dmaaddr; + txbi->len = len; +} + +static void +jme_map_tx_skb(struct jme_adapter *jme, struct sk_buff *skb, int idx) +{ + struct jme_ring *txring = jme->txring; + struct txdesc *txdesc = txring->desc, *ctxdesc; + struct jme_buffer_info *txbi = txring->bufinf, *ctxbi; + u8 hidma = jme->dev->features & NETIF_F_HIGHDMA; + int i, nr_frags = skb_shinfo(skb)->nr_frags; + int mask = jme->tx_ring_mask; + struct skb_frag_struct *frag; + u32 len; + + for (i = 0 ; i < nr_frags ; ++i) { + frag = &skb_shinfo(skb)->frags[i]; + ctxdesc = txdesc + ((idx + i + 2) & (mask)); + ctxbi = txbi + ((idx + i + 2) & (mask)); + + jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, frag->page, + frag->page_offset, frag->size, hidma); + } + + len = skb_is_nonlinear(skb) ? skb_headlen(skb) : skb->len; + ctxdesc = txdesc + ((idx + 1) & (mask)); + ctxbi = txbi + ((idx + 1) & (mask)); + jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, virt_to_page(skb->data), + offset_in_page(skb->data), len, hidma); + +} + +static int +jme_expand_header(struct jme_adapter *jme, struct sk_buff *skb) +{ + if (unlikely(skb_shinfo(skb)->gso_size && + skb_header_cloned(skb) && + pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) { + dev_kfree_skb(skb); + return -1; + } + + return 0; +} + +static int +jme_tx_tso(struct sk_buff *skb, + u16 *mss, u8 *flags) +{ + *mss = skb_shinfo(skb)->gso_size << TXDESC_MSS_SHIFT; + if (*mss) { + *flags |= TXFLAG_LSEN; + + if (skb->protocol == htons(ETH_P_IP)) { + struct iphdr *iph = ip_hdr(skb); + + iph->check = 0; + tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, + iph->daddr, 0, + IPPROTO_TCP, + 0); + } else { + struct ipv6hdr *ip6h = ipv6_hdr(skb); + + tcp_hdr(skb)->check = ~csum_ipv6_magic(&ip6h->saddr, + &ip6h->daddr, 0, + IPPROTO_TCP, + 0); + } + + return 0; + } + + return 1; +} + +static void +jme_tx_csum(struct jme_adapter *jme, struct sk_buff *skb, u8 *flags) +{ + if (skb->ip_summed == CHECKSUM_PARTIAL) { + u8 ip_proto; + + switch (skb->protocol) { + case htons(ETH_P_IP): + ip_proto = ip_hdr(skb)->protocol; + break; + case htons(ETH_P_IPV6): + ip_proto = ipv6_hdr(skb)->nexthdr; + break; + default: + ip_proto = 0; + break; + } + + switch (ip_proto) { + case IPPROTO_TCP: + *flags |= TXFLAG_TCPCS; + break; + case IPPROTO_UDP: + *flags |= TXFLAG_UDPCS; + break; + default: + msg_tx_err(jme, "Error upper layer protocol.\n"); + break; + } + } +} + +static inline void +jme_tx_vlan(struct sk_buff *skb, u16 *vlan, u8 *flags) +{ + if (vlan_tx_tag_present(skb)) { + *flags |= TXFLAG_TAGON; + *vlan = vlan_tx_tag_get(skb); + } +} + +static int +jme_fill_first_tx_desc(struct jme_adapter *jme, struct sk_buff *skb, int idx) +{ + struct jme_ring *txring = jme->txring; + struct txdesc *txdesc; + struct jme_buffer_info *txbi; + u8 flags; + + txdesc = (struct txdesc *)txring->desc + idx; + txbi = txring->bufinf + idx; + + txdesc->dw[0] = 0; + txdesc->dw[1] = 0; + txdesc->dw[2] = 0; + txdesc->dw[3] = 0; + txdesc->desc1.pktsize = cpu_to_le16(skb->len); + /* + * Set OWN bit at final. + * When kernel transmit faster than NIC. + * And NIC trying to send this descriptor before we tell + * it to start sending this TX queue. + * Other fields are already filled correctly. + */ + wmb(); + flags = TXFLAG_OWN | TXFLAG_INT; + /* + * Set checksum flags while not tso + */ + if (jme_tx_tso(skb, &txdesc->desc1.mss, &flags)) + jme_tx_csum(jme, skb, &flags); + jme_tx_vlan(skb, &txdesc->desc1.vlan, &flags); + txdesc->desc1.flags = flags; + /* + * Set tx buffer info after telling NIC to send + * For better tx_clean timing + */ + wmb(); + txbi->nr_desc = skb_shinfo(skb)->nr_frags + 2; + txbi->skb = skb; + txbi->len = skb->len; + txbi->start_xmit = jiffies; + if (!txbi->start_xmit) + txbi->start_xmit = (0UL-1); + + return 0; +} + +static void +jme_stop_queue_if_full(struct jme_adapter *jme) +{ + struct jme_ring *txring = jme->txring; + struct jme_buffer_info *txbi = txring->bufinf; + int idx = atomic_read(&txring->next_to_clean); + + txbi += idx; + + smp_wmb(); + if (unlikely(atomic_read(&txring->nr_free) < (MAX_SKB_FRAGS+2))) { + netif_stop_queue(jme->dev); + msg_tx_queued(jme, "TX Queue Paused.\n"); + smp_wmb(); + if (atomic_read(&txring->nr_free) + >= (jme->tx_wake_threshold)) { + netif_wake_queue(jme->dev); + msg_tx_queued(jme, "TX Queue Fast Waked.\n"); + } + } + + if (unlikely(txbi->start_xmit && + (jiffies - txbi->start_xmit) >= TX_TIMEOUT && + txbi->skb)) { + netif_stop_queue(jme->dev); + msg_tx_queued(jme, "TX Queue Stopped %d@%lu.\n", idx, jiffies); + } +} + +/* + * This function is already protected by netif_tx_lock() + */ + +static int +jme_start_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + int idx; + + if (unlikely(jme_expand_header(jme, skb))) { + ++(NET_STAT(jme).tx_dropped); + return NETDEV_TX_OK; + } + + idx = jme_alloc_txdesc(jme, skb); + + if (unlikely(idx < 0)) { + netif_stop_queue(netdev); + msg_tx_err(jme, "BUG! Tx ring full when queue awake!\n"); + + return NETDEV_TX_BUSY; + } + + jme_map_tx_skb(jme, skb, idx); + jme_fill_first_tx_desc(jme, skb, idx); + + jwrite32(jme, JME_TXCS, jme->reg_txcs | + TXCS_SELECT_QUEUE0 | + TXCS_QUEUE0S | + TXCS_ENABLE); + netdev->trans_start = jiffies; + + tx_dbg(jme, "xmit: %d+%d@%lu\n", idx, + skb_shinfo(skb)->nr_frags + 2, + jiffies); + jme_stop_queue_if_full(jme); + + return NETDEV_TX_OK; +} + +static int +jme_set_macaddr(struct net_device *netdev, void *p) +{ + struct jme_adapter *jme = netdev_priv(netdev); + struct sockaddr *addr = p; + u32 val; + + if (netif_running(netdev)) + return -EBUSY; + + spin_lock_bh(&jme->macaddr_lock); + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); + + val = (addr->sa_data[3] & 0xff) << 24 | + (addr->sa_data[2] & 0xff) << 16 | + (addr->sa_data[1] & 0xff) << 8 | + (addr->sa_data[0] & 0xff); + jwrite32(jme, JME_RXUMA_LO, val); + val = (addr->sa_data[5] & 0xff) << 8 | + (addr->sa_data[4] & 0xff); + jwrite32(jme, JME_RXUMA_HI, val); + spin_unlock_bh(&jme->macaddr_lock); + + return 0; +} + +static void +jme_set_multi(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + u32 mc_hash[2] = {}; + int i; + + spin_lock_bh(&jme->rxmcs_lock); + + jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME; + + if (netdev->flags & IFF_PROMISC) { + jme->reg_rxmcs |= RXMCS_ALLFRAME; + } else if (netdev->flags & IFF_ALLMULTI) { + jme->reg_rxmcs |= RXMCS_ALLMULFRAME; + } else if (netdev->flags & IFF_MULTICAST) { + struct dev_mc_list *mclist; + int bit_nr; + + jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED; + for (i = 0, mclist = netdev->mc_list; + mclist && i < netdev->mc_count; + ++i, mclist = mclist->next) { + + bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x3F; + mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F); + } + + jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]); + jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]); + } + + wmb(); + jwrite32(jme, JME_RXMCS, jme->reg_rxmcs); + + spin_unlock_bh(&jme->rxmcs_lock); +} + +static int +jme_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + if (new_mtu == jme->old_mtu) + return 0; + + if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) || + ((new_mtu) < IPV6_MIN_MTU)) + return -EINVAL; + + if (new_mtu > 4000) { + jme->reg_rxcs &= ~RXCS_FIFOTHNP; + jme->reg_rxcs |= RXCS_FIFOTHNP_64QW; + jme_restart_rx_engine(jme); + } else { + jme->reg_rxcs &= ~RXCS_FIFOTHNP; + jme->reg_rxcs |= RXCS_FIFOTHNP_128QW; + jme_restart_rx_engine(jme); + } + + if (new_mtu > 1900) { + netdev->features &= ~(NETIF_F_HW_CSUM | + NETIF_F_TSO | + NETIF_F_TSO6); + } else { + if (test_bit(JME_FLAG_TXCSUM, &jme->flags)) + netdev->features |= NETIF_F_HW_CSUM; + if (test_bit(JME_FLAG_TSO, &jme->flags)) + netdev->features |= NETIF_F_TSO | NETIF_F_TSO6; + } + + netdev->mtu = new_mtu; + jme_reset_link(jme); + + return 0; +} + +static void +jme_tx_timeout(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + jme->phylink = 0; + jme_reset_phy_processor(jme); + if (test_bit(JME_FLAG_SSET, &jme->flags)) + jme_set_settings(netdev, &jme->old_ecmd); + + /* + * Force to Reset the link again + */ + jme_reset_link(jme); +} + +static void +jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + jme->vlgrp = grp; +} + +static void +jme_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *info) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + strcpy(info->driver, DRV_NAME); + strcpy(info->version, DRV_VERSION); + strcpy(info->bus_info, pci_name(jme->pdev)); +} + +static int +jme_get_regs_len(struct net_device *netdev) +{ + return JME_REG_LEN; +} + +static void +mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len) +{ + int i; + + for (i = 0 ; i < len ; i += 4) + p[i >> 2] = jread32(jme, reg + i); +} + +static void +mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr) +{ + int i; + u16 *p16 = (u16 *)p; + + for (i = 0 ; i < reg_nr ; ++i) + p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i); +} + +static void +jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p) +{ + struct jme_adapter *jme = netdev_priv(netdev); + u32 *p32 = (u32 *)p; + + memset(p, 0xFF, JME_REG_LEN); + + regs->version = 1; + mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN); + + p32 += 0x100 >> 2; + mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN); + + p32 += 0x100 >> 2; + mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN); + + p32 += 0x100 >> 2; + mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN); + + p32 += 0x100 >> 2; + mdio_memcpy(jme, p32, JME_PHY_REG_NR); +} + +static int +jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + ecmd->tx_coalesce_usecs = PCC_TX_TO; + ecmd->tx_max_coalesced_frames = PCC_TX_CNT; + + if (test_bit(JME_FLAG_POLL, &jme->flags)) { + ecmd->use_adaptive_rx_coalesce = false; + ecmd->rx_coalesce_usecs = 0; + ecmd->rx_max_coalesced_frames = 0; + return 0; + } + + ecmd->use_adaptive_rx_coalesce = true; + + switch (jme->dpi.cur) { + case PCC_P1: + ecmd->rx_coalesce_usecs = PCC_P1_TO; + ecmd->rx_max_coalesced_frames = PCC_P1_CNT; + break; + case PCC_P2: + ecmd->rx_coalesce_usecs = PCC_P2_TO; + ecmd->rx_max_coalesced_frames = PCC_P2_CNT; + break; + case PCC_P3: + ecmd->rx_coalesce_usecs = PCC_P3_TO; + ecmd->rx_max_coalesced_frames = PCC_P3_CNT; + break; + default: + break; + } + + return 0; +} + +static int +jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd) +{ + struct jme_adapter *jme = netdev_priv(netdev); + struct dynpcc_info *dpi = &(jme->dpi); + + if (netif_running(netdev)) + return -EBUSY; + + if (ecmd->use_adaptive_rx_coalesce + && test_bit(JME_FLAG_POLL, &jme->flags)) { + clear_bit(JME_FLAG_POLL, &jme->flags); + jme->jme_rx = netif_rx; + jme->jme_vlan_rx = vlan_hwaccel_rx; + dpi->cur = PCC_P1; + dpi->attempt = PCC_P1; + dpi->cnt = 0; + jme_set_rx_pcc(jme, PCC_P1); + jme_interrupt_mode(jme); + } else if (!(ecmd->use_adaptive_rx_coalesce) + && !(test_bit(JME_FLAG_POLL, &jme->flags))) { + set_bit(JME_FLAG_POLL, &jme->flags); + jme->jme_rx = netif_receive_skb; + jme->jme_vlan_rx = vlan_hwaccel_receive_skb; + jme_interrupt_mode(jme); + } + + return 0; +} + +static void +jme_get_pauseparam(struct net_device *netdev, + struct ethtool_pauseparam *ecmd) +{ + struct jme_adapter *jme = netdev_priv(netdev); + u32 val; + + ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0; + ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0; + + spin_lock_bh(&jme->phy_lock); + val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE); + spin_unlock_bh(&jme->phy_lock); + + ecmd->autoneg = + (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0; +} + +static int +jme_set_pauseparam(struct net_device *netdev, + struct ethtool_pauseparam *ecmd) +{ + struct jme_adapter *jme = netdev_priv(netdev); + u32 val; + + if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^ + (ecmd->tx_pause != 0)) { + + if (ecmd->tx_pause) + jme->reg_txpfc |= TXPFC_PF_EN; + else + jme->reg_txpfc &= ~TXPFC_PF_EN; + + jwrite32(jme, JME_TXPFC, jme->reg_txpfc); + } + + spin_lock_bh(&jme->rxmcs_lock); + if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^ + (ecmd->rx_pause != 0)) { + + if (ecmd->rx_pause) + jme->reg_rxmcs |= RXMCS_FLOWCTRL; + else + jme->reg_rxmcs &= ~RXMCS_FLOWCTRL; + + jwrite32(jme, JME_RXMCS, jme->reg_rxmcs); + } + spin_unlock_bh(&jme->rxmcs_lock); + + spin_lock_bh(&jme->phy_lock); + val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE); + if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^ + (ecmd->autoneg != 0)) { + + if (ecmd->autoneg) + val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); + else + val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); + + jme_mdio_write(jme->dev, jme->mii_if.phy_id, + MII_ADVERTISE, val); + } + spin_unlock_bh(&jme->phy_lock); + + return 0; +} + +static void +jme_get_wol(struct net_device *netdev, + struct ethtool_wolinfo *wol) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + wol->supported = WAKE_MAGIC | WAKE_PHY; + + wol->wolopts = 0; + + if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN)) + wol->wolopts |= WAKE_PHY; + + if (jme->reg_pmcs & PMCS_MFEN) + wol->wolopts |= WAKE_MAGIC; + +} + +static int +jme_set_wol(struct net_device *netdev, + struct ethtool_wolinfo *wol) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + if (wol->wolopts & (WAKE_MAGICSECURE | + WAKE_UCAST | + WAKE_MCAST | + WAKE_BCAST | + WAKE_ARP)) + return -EOPNOTSUPP; + + jme->reg_pmcs = 0; + + if (wol->wolopts & WAKE_PHY) + jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN; + + if (wol->wolopts & WAKE_MAGIC) + jme->reg_pmcs |= PMCS_MFEN; + + jwrite32(jme, JME_PMCS, jme->reg_pmcs); + + return 0; +} + +static int +jme_get_settings(struct net_device *netdev, + struct ethtool_cmd *ecmd) +{ + struct jme_adapter *jme = netdev_priv(netdev); + int rc; + + spin_lock_bh(&jme->phy_lock); + rc = mii_ethtool_gset(&(jme->mii_if), ecmd); + spin_unlock_bh(&jme->phy_lock); + return rc; +} + +static int +jme_set_settings(struct net_device *netdev, + struct ethtool_cmd *ecmd) +{ + struct jme_adapter *jme = netdev_priv(netdev); + int rc, fdc = 0; + + if (ecmd->speed == SPEED_1000 && ecmd->autoneg != AUTONEG_ENABLE) + return -EINVAL; + + if (jme->mii_if.force_media && + ecmd->autoneg != AUTONEG_ENABLE && + (jme->mii_if.full_duplex != ecmd->duplex)) + fdc = 1; + + spin_lock_bh(&jme->phy_lock); + rc = mii_ethtool_sset(&(jme->mii_if), ecmd); + spin_unlock_bh(&jme->phy_lock); + + if (!rc && fdc) + jme_reset_link(jme); + + if (!rc) { + set_bit(JME_FLAG_SSET, &jme->flags); + jme->old_ecmd = *ecmd; + } + + return rc; +} + +static u32 +jme_get_link(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP; +} + +static u32 +jme_get_msglevel(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + return jme->msg_enable; +} + +static void +jme_set_msglevel(struct net_device *netdev, u32 value) +{ + struct jme_adapter *jme = netdev_priv(netdev); + jme->msg_enable = value; +} + +static u32 +jme_get_rx_csum(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + return jme->reg_rxmcs & RXMCS_CHECKSUM; +} + +static int +jme_set_rx_csum(struct net_device *netdev, u32 on) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + spin_lock_bh(&jme->rxmcs_lock); + if (on) + jme->reg_rxmcs |= RXMCS_CHECKSUM; + else + jme->reg_rxmcs &= ~RXMCS_CHECKSUM; + jwrite32(jme, JME_RXMCS, jme->reg_rxmcs); + spin_unlock_bh(&jme->rxmcs_lock); + + return 0; +} + +static int +jme_set_tx_csum(struct net_device *netdev, u32 on) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + if (on) { + set_bit(JME_FLAG_TXCSUM, &jme->flags); + if (netdev->mtu <= 1900) + netdev->features |= NETIF_F_HW_CSUM; + } else { + clear_bit(JME_FLAG_TXCSUM, &jme->flags); + netdev->features &= ~NETIF_F_HW_CSUM; + } + + return 0; +} + +static int +jme_set_tso(struct net_device *netdev, u32 on) +{ + struct jme_adapter *jme = netdev_priv(netdev); + + if (on) { + set_bit(JME_FLAG_TSO, &jme->flags); + if (netdev->mtu <= 1900) + netdev->features |= NETIF_F_TSO | NETIF_F_TSO6; + } else { + clear_bit(JME_FLAG_TSO, &jme->flags); + netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); + } + + return 0; +} + +static int +jme_nway_reset(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + jme_restart_an(jme); + return 0; +} + +static u8 +jme_smb_read(struct jme_adapter *jme, unsigned int addr) +{ + u32 val; + int to; + + val = jread32(jme, JME_SMBCSR); + to = JME_SMB_BUSY_TIMEOUT; + while ((val & SMBCSR_BUSY) && --to) { + msleep(1); + val = jread32(jme, JME_SMBCSR); + } + if (!to) { + msg_hw(jme, "SMB Bus Busy.\n"); + return 0xFF; + } + + jwrite32(jme, JME_SMBINTF, + ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) | + SMBINTF_HWRWN_READ | + SMBINTF_HWCMD); + + val = jread32(jme, JME_SMBINTF); + to = JME_SMB_BUSY_TIMEOUT; + while ((val & SMBINTF_HWCMD) && --to) { + msleep(1); + val = jread32(jme, JME_SMBINTF); + } + if (!to) { + msg_hw(jme, "SMB Bus Busy.\n"); + return 0xFF; + } + + return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT; +} + +static void +jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data) +{ + u32 val; + int to; + + val = jread32(jme, JME_SMBCSR); + to = JME_SMB_BUSY_TIMEOUT; + while ((val & SMBCSR_BUSY) && --to) { + msleep(1); + val = jread32(jme, JME_SMBCSR); + } + if (!to) { + msg_hw(jme, "SMB Bus Busy.\n"); + return; + } + + jwrite32(jme, JME_SMBINTF, + ((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) | + ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) | + SMBINTF_HWRWN_WRITE | + SMBINTF_HWCMD); + + val = jread32(jme, JME_SMBINTF); + to = JME_SMB_BUSY_TIMEOUT; + while ((val & SMBINTF_HWCMD) && --to) { + msleep(1); + val = jread32(jme, JME_SMBINTF); + } + if (!to) { + msg_hw(jme, "SMB Bus Busy.\n"); + return; + } + + mdelay(2); +} + +static int +jme_get_eeprom_len(struct net_device *netdev) +{ + struct jme_adapter *jme = netdev_priv(netdev); + u32 val; + val = jread32(jme, JME_SMBCSR); + return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0; +} + +static int +jme_get_eeprom(struct net_device *netdev, + struct ethtool_eeprom *eeprom, u8 *data) +{ + struct jme_adapter *jme = netdev_priv(netdev); + int i, offset = eeprom->offset, len = eeprom->len; + + /* + * ethtool will check the boundary for us + */ + eeprom->magic = JME_EEPROM_MAGIC; + for (i = 0 ; i < len ; ++i) + data[i] = jme_smb_read(jme, i + offset); + + return 0; +} + +static int +jme_set_eeprom(struct net_device *netdev, + struct ethtool_eeprom *eeprom, u8 *data) +{ + struct jme_adapter *jme = netdev_priv(netdev); + int i, offset = eeprom->offset, len = eeprom->len; + + if (eeprom->magic != JME_EEPROM_MAGIC) + return -EINVAL; + + /* + * ethtool will check the boundary for us + */ + for (i = 0 ; i < len ; ++i) + jme_smb_write(jme, i + offset, data[i]); + + return 0; +} + +static const struct ethtool_ops jme_ethtool_ops = { + .get_drvinfo = jme_get_drvinfo, + .get_regs_len = jme_get_regs_len, + .get_regs = jme_get_regs, + .get_coalesce = jme_get_coalesce, + .set_coalesce = jme_set_coalesce, + .get_pauseparam = jme_get_pauseparam, + .set_pauseparam = jme_set_pauseparam, + .get_wol = jme_get_wol, + .set_wol = jme_set_wol, + .get_settings = jme_get_settings, + .set_settings = jme_set_settings, + .get_link = jme_get_link, + .get_msglevel = jme_get_msglevel, + .set_msglevel = jme_set_msglevel, + .get_rx_csum = jme_get_rx_csum, + .set_rx_csum = jme_set_rx_csum, + .set_tx_csum = jme_set_tx_csum, + .set_tso = jme_set_tso, + .set_sg = ethtool_op_set_sg, + .nway_reset = jme_nway_reset, + .get_eeprom_len = jme_get_eeprom_len, + .get_eeprom = jme_get_eeprom, + .set_eeprom = jme_set_eeprom, +}; + +static int +jme_pci_dma64(struct pci_dev *pdev) +{ + if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) + if (!pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) + return 1; + + if (!pci_set_dma_mask(pdev, DMA_40BIT_MASK)) + if (!pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK)) + return 1; + + if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)) + if (!pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) + return 0; + + return -1; +} + +static inline void +jme_phy_init(struct jme_adapter *jme) +{ + u16 reg26; + + reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26); + jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000); +} + +static inline void +jme_check_hw_ver(struct jme_adapter *jme) +{ + u32 chipmode; + + chipmode = jread32(jme, JME_CHIPMODE); + + jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT; + jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT; +} + +static int __devinit +jme_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + int rc = 0, using_dac, i; + struct net_device *netdev; + struct jme_adapter *jme; + u16 bmcr, bmsr; + u32 apmc; + + /* + * set up PCI device basics + */ + rc = pci_enable_device(pdev); + if (rc) { + jeprintk(pdev, "Cannot enable PCI device.\n"); + goto err_out; + } + + using_dac = jme_pci_dma64(pdev); + if (using_dac < 0) { + jeprintk(pdev, "Cannot set PCI DMA Mask.\n"); + rc = -EIO; + goto err_out_disable_pdev; + } + + if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { + jeprintk(pdev, "No PCI resource region found.\n"); + rc = -ENOMEM; + goto err_out_disable_pdev; + } + + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) { + jeprintk(pdev, "Cannot obtain PCI resource region.\n"); + goto err_out_disable_pdev; + } + + pci_set_master(pdev); + + /* + * alloc and init net device + */ + netdev = alloc_etherdev(sizeof(*jme)); + if (!netdev) { + jeprintk(pdev, "Cannot allocate netdev structure.\n"); + rc = -ENOMEM; + goto err_out_release_regions; + } + netdev->open = jme_open; + netdev->stop = jme_close; + netdev->hard_start_xmit = jme_start_xmit; + netdev->set_mac_address = jme_set_macaddr; + netdev->set_multicast_list = jme_set_multi; + netdev->change_mtu = jme_change_mtu; + netdev->ethtool_ops = &jme_ethtool_ops; + netdev->tx_timeout = jme_tx_timeout; + netdev->watchdog_timeo = TX_TIMEOUT; + netdev->vlan_rx_register = jme_vlan_rx_register; + NETDEV_GET_STATS(netdev, &jme_get_stats); + netdev->features = NETIF_F_HW_CSUM | + NETIF_F_SG | + NETIF_F_TSO | + NETIF_F_TSO6 | + NETIF_F_HW_VLAN_TX | + NETIF_F_HW_VLAN_RX; + if (using_dac) + netdev->features |= NETIF_F_HIGHDMA; + + SET_NETDEV_DEV(netdev, &pdev->dev); + pci_set_drvdata(pdev, netdev); + + /* + * init adapter info + */ + jme = netdev_priv(netdev); + jme->pdev = pdev; + jme->dev = netdev; + jme->jme_rx = netif_rx; + jme->jme_vlan_rx = vlan_hwaccel_rx; + jme->old_mtu = netdev->mtu = 1500; + jme->phylink = 0; + jme->tx_ring_size = 1 << 10; + jme->tx_ring_mask = jme->tx_ring_size - 1; + jme->tx_wake_threshold = 1 << 9; + jme->rx_ring_size = 1 << 9; + jme->rx_ring_mask = jme->rx_ring_size - 1; + jme->msg_enable = JME_DEF_MSG_ENABLE; + jme->regs = ioremap(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + if (!(jme->regs)) { + jeprintk(pdev, "Mapping PCI resource region error.\n"); + rc = -ENOMEM; + goto err_out_free_netdev; + } + jme->shadow_regs = pci_alloc_consistent(pdev, + sizeof(u32) * SHADOW_REG_NR, + &(jme->shadow_dma)); + if (!(jme->shadow_regs)) { + jeprintk(pdev, "Allocating shadow register mapping error.\n"); + rc = -ENOMEM; + goto err_out_unmap; + } + + if (no_pseudohp) { + apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN; + jwrite32(jme, JME_APMC, apmc); + } else if (force_pseudohp) { + apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN; + jwrite32(jme, JME_APMC, apmc); + } + + NETIF_NAPI_SET(netdev, &jme->napi, jme_poll, jme->rx_ring_size >> 2) + + spin_lock_init(&jme->phy_lock); + spin_lock_init(&jme->macaddr_lock); + spin_lock_init(&jme->rxmcs_lock); + + atomic_set(&jme->link_changing, 1); + atomic_set(&jme->rx_cleaning, 1); + atomic_set(&jme->tx_cleaning, 1); + atomic_set(&jme->rx_empty, 1); + + tasklet_init(&jme->pcc_task, + &jme_pcc_tasklet, + (unsigned long) jme); + tasklet_init(&jme->linkch_task, + &jme_link_change_tasklet, + (unsigned long) jme); + tasklet_init(&jme->txclean_task, + &jme_tx_clean_tasklet, + (unsigned long) jme); + tasklet_init(&jme->rxclean_task, + &jme_rx_clean_tasklet, + (unsigned long) jme); + tasklet_init(&jme->rxempty_task, + &jme_rx_empty_tasklet, + (unsigned long) jme); + tasklet_disable_nosync(&jme->txclean_task); + tasklet_disable_nosync(&jme->rxclean_task); + tasklet_disable_nosync(&jme->rxempty_task); + jme->dpi.cur = PCC_P1; + + jme->reg_ghc = 0; + jme->reg_rxcs = RXCS_DEFAULT; + jme->reg_rxmcs = RXMCS_DEFAULT; + jme->reg_txpfc = 0; + jme->reg_pmcs = PMCS_MFEN; + set_bit(JME_FLAG_TXCSUM, &jme->flags); + set_bit(JME_FLAG_TSO, &jme->flags); + + /* + * Get Max Read Req Size from PCI Config Space + */ + pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs); + jme->mrrs &= PCI_DCSR_MRRS_MASK; + switch (jme->mrrs) { + case MRRS_128B: + jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B; + break; + case MRRS_256B: + jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B; + break; + default: + jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B; + break; + }; + + /* + * Must check before reset_mac_processor + */ + jme_check_hw_ver(jme); + jme->mii_if.dev = netdev; + if (jme->fpgaver) { + jme->mii_if.phy_id = 0; + for (i = 1 ; i < 32 ; ++i) { + bmcr = jme_mdio_read(netdev, i, MII_BMCR); + bmsr = jme_mdio_read(netdev, i, MII_BMSR); + if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) { + jme->mii_if.phy_id = i; + break; + } + } + + if (!jme->mii_if.phy_id) { + rc = -EIO; + jeprintk(pdev, "Can not find phy_id.\n"); + goto err_out_free_shadow; + } + + jme->reg_ghc |= GHC_LINK_POLL; + } else { + jme->mii_if.phy_id = 1; + } + if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) + jme->mii_if.supports_gmii = true; + else + jme->mii_if.supports_gmii = false; + jme->mii_if.mdio_read = jme_mdio_read; + jme->mii_if.mdio_write = jme_mdio_write; + + jme_clear_pm(jme); + jme_set_phyfifoa(jme); + pci_read_config_byte(pdev, PCI_REVISION_ID, &jme->rev); + if (!jme->fpgaver) + jme_phy_init(jme); + jme_phy_off(jme); + + /* + * Reset MAC processor and reload EEPROM for MAC Address + */ + jme_reset_mac_processor(jme); + rc = jme_reload_eeprom(jme); + if (rc) { + jeprintk(pdev, + "Reload eeprom for reading MAC Address error.\n"); + goto err_out_free_shadow; + } + jme_load_macaddr(netdev); + + /* + * Tell stack that we are not ready to work until open() + */ + netif_carrier_off(netdev); + netif_stop_queue(netdev); + + /* + * Register netdev + */ + rc = register_netdev(netdev); + if (rc) { + jeprintk(pdev, "Cannot register net device.\n"); + goto err_out_free_shadow; + } + + msg_probe(jme, + "JMC250 gigabit%s ver:%x rev:%x " + "macaddr:%02x:%02x:%02x:%02x:%02x:%02x\n", + (jme->fpgaver != 0) ? " (FPGA)" : "", + (jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev, + jme->rev, + netdev->dev_addr[0], + netdev->dev_addr[1], + netdev->dev_addr[2], + netdev->dev_addr[3], + netdev->dev_addr[4], + netdev->dev_addr[5]); + + return 0; + +err_out_free_shadow: + pci_free_consistent(pdev, + sizeof(u32) * SHADOW_REG_NR, + jme->shadow_regs, + jme->shadow_dma); +err_out_unmap: + iounmap(jme->regs); +err_out_free_netdev: + pci_set_drvdata(pdev, NULL); + free_netdev(netdev); +err_out_release_regions: + pci_release_regions(pdev); +err_out_disable_pdev: + pci_disable_device(pdev); +err_out: + return rc; +} + +static void __devexit +jme_remove_one(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct jme_adapter *jme = netdev_priv(netdev); + + unregister_netdev(netdev); + pci_free_consistent(pdev, + sizeof(u32) * SHADOW_REG_NR, + jme->shadow_regs, + jme->shadow_dma); + iounmap(jme->regs); + pci_set_drvdata(pdev, NULL); + free_netdev(netdev); + pci_release_regions(pdev); + pci_disable_device(pdev); + +} + +#ifdef CONFIG_PM +static int +jme_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct jme_adapter *jme = netdev_priv(netdev); + + atomic_dec(&jme->link_changing); + + netif_device_detach(netdev); + netif_stop_queue(netdev); + jme_stop_irq(jme); + + tasklet_disable(&jme->txclean_task); + tasklet_disable(&jme->rxclean_task); + tasklet_disable(&jme->rxempty_task); + + jme_disable_shadow(jme); + + if (netif_carrier_ok(netdev)) { + if (test_bit(JME_FLAG_POLL, &jme->flags)) + jme_polling_mode(jme); + + jme_stop_pcc_timer(jme); + jme_reset_ghc_speed(jme); + jme_disable_rx_engine(jme); + jme_disable_tx_engine(jme); + jme_reset_mac_processor(jme); + jme_free_rx_resources(jme); + jme_free_tx_resources(jme); + netif_carrier_off(netdev); + jme->phylink = 0; + } + + tasklet_enable(&jme->txclean_task); + tasklet_hi_enable(&jme->rxclean_task); + tasklet_hi_enable(&jme->rxempty_task); + + pci_save_state(pdev); + if (jme->reg_pmcs) { + jme_set_100m_half(jme); + + if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN)) + jme_wait_link(jme); + + jwrite32(jme, JME_PMCS, jme->reg_pmcs); + + pci_enable_wake(pdev, PCI_D3cold, true); + } else { + jme_phy_off(jme); + } + pci_set_power_state(pdev, PCI_D3cold); + + return 0; +} + +static int +jme_resume(struct pci_dev *pdev) +{ + struct net_device *netdev = pci_get_drvdata(pdev); + struct jme_adapter *jme = netdev_priv(netdev); + + jme_clear_pm(jme); + pci_restore_state(pdev); + + if (test_bit(JME_FLAG_SSET, &jme->flags)) + jme_set_settings(netdev, &jme->old_ecmd); + else + jme_reset_phy_processor(jme); + + jme_enable_shadow(jme); + jme_start_irq(jme); + netif_device_attach(netdev); + + atomic_inc(&jme->link_changing); + + jme_reset_link(jme); + + return 0; +} +#endif + +static struct pci_device_id jme_pci_tbl[] = { + { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) }, + { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) }, + { } +}; + +static struct pci_driver jme_driver = { + .name = DRV_NAME, + .id_table = jme_pci_tbl, + .probe = jme_init_one, + .remove = __devexit_p(jme_remove_one), +#ifdef CONFIG_PM + .suspend = jme_suspend, + .resume = jme_resume, +#endif /* CONFIG_PM */ +}; + +static int __init +jme_init_module(void) +{ + printk(KERN_INFO PFX "JMicron JMC250 gigabit ethernet " + "driver version %s\n", DRV_VERSION); + return pci_register_driver(&jme_driver); +} + +static void __exit +jme_cleanup_module(void) +{ + pci_unregister_driver(&jme_driver); +} + +module_init(jme_init_module); +module_exit(jme_cleanup_module); + +MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>"); +MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); +MODULE_DEVICE_TABLE(pci, jme_pci_tbl); + |