diff options
| -rw-r--r-- | MAINTAINERS | 6 | ||||
| -rw-r--r-- | drivers/net/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/net/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/jme.c | 3019 | ||||
| -rw-r--r-- | drivers/net/jme.h | 1199 |
5 files changed, 4237 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 467f994b1fa0..c8203d780f0b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2326,6 +2326,12 @@ L: video4linux-list@redhat.com W: http://www.ivtvdriver.org S: Maintained +JME NETWORK DRIVER +P: Guo-Fu Tseng +M: cooldavid@cooldavid.org +L: netdev@vger.kernel.org +S: Maintained + JOURNALLING FLASH FILE SYSTEM V2 (JFFS2) P: David Woodhouse M: dwmw2@infradead.org diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 5c012cd8fe3d..069755af761f 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -2313,6 +2313,18 @@ config ATL1E To compile this driver as a module, choose M here. The module will be called atl1e. +config JME + tristate "JMicron(R) PCI-Express Gigabit Ethernet support" + depends on PCI + select CRC32 + select MII + ---help--- + This driver supports the PCI-Express gigabit ethernet adapters + based on JMicron JMC250 chipset. + + To compile this driver as a module, choose M here. The module + will be called jme. + endif # NETDEV_1000 # diff --git a/drivers/net/Makefile b/drivers/net/Makefile index d4ec6ba7f073..016e23f000ee 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_ATL1E) += atl1e/ obj-$(CONFIG_GIANFAR) += gianfar_driver.o obj-$(CONFIG_TEHUTI) += tehuti.o obj-$(CONFIG_ENIC) += enic/ +obj-$(CONFIG_JME) += jme.o gianfar_driver-objs := gianfar.o \ gianfar_ethtool.o \ diff --git a/drivers/net/jme.c b/drivers/net/jme.c new file mode 100644 index 000000000000..f292df557544 --- /dev/null +++ b/drivers/net/jme.c @@ -0,0 +1,3019 @@ +/* + * 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/version.h> +#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 "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, 0); +} + +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; + 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, "); + if (is_buggy250(jme->pdev->device, jme->chiprev)) + jme_set_phyfifoa(jme); + break; + case PHY_LINK_SPEED_100M: + ghc |= GHC_SPEED_100M; + strcat(linkmsg, "100 Mbps, "); + if (is_buggy250(jme->pdev->device, jme->chiprev)) + jme_set_phyfifob(jme); + break; + case PHY_LINK_SPEED_1000M: + ghc |= GHC_SPEED_1000M; + strcat(linkmsg, "1000 Mbps, "); + if (is_buggy250(jme->pdev->device, jme->chiprev)) + jme_set_phyfifoa(jme); + break; + default: + break; + } + ghc |= (phylink & PHY_LINK_DUPLEX) ? GHC_DPX : 0; + + strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ? + "Full-Duplex, " : + "Half-Duplex, "); + + if (phylink & PHY_LINK_MDI_STAT) + strcat(linkmsg, "MDI-X"); + else + strcat(linkmsg, "MDI"); + + if (phylink & PHY_LINK_DUPLEX) { + jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT); + } 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)); + } + + 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_ |