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Import jme 0.4 source
[jme.git] / jme.c
diff --git a/jme.c b/jme.c
index 100a662208229db9a636e87f9bfd0d7918f4c00a..c977884112cadd7fe8b1c185a01188a39d842db1 100644 (file)
--- a/jme.c
+++ b/jme.c
@@ -4,6 +4,8 @@
  * Copyright 2008 JMicron Technology Corporation
  * http://www.jmicron.com/
  *
  * 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 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.
@@ -19,25 +21,21 @@
  *
  */
 
  *
  */
 
+/*
+ * Note:
+ *     Watchdog:
+ *             check if rx queue stoped.
+ *             And restart it after rx ring cleaned.
+ */
+
 /*
  * Timeline before release:
 /*
  * Timeline before release:
- *     Stage 1: Basic Performance / Capbility fine tune.
- *     -  Implement PCC -- Dynamic adjustment.
- *     -  Use NAPI instead of rx_tasklet?
- *             PCC Support Both Packet Counter and Timeout Interrupt for
- *             receive and transmit complete, does NAPI really needed?
- *             I'll add NAPI support anyway..
- *             For CPU busy and heavy network loading system..
- *     -  Try setting 64bit DMA with pci_set[_consistent]_dma_mask
- *        and set netdev feature flag.
- *        (Need to modity transmit descriptor filling policy as well)
- *      -  Use pci_map_page instead of pci_map_single for HIGHMEM support
- *
  *     Stage 2: Error handling.
  *     -  Wathch dog
  *     -  Transmit timeout
  *
  *     Stage 3: Basic offloading support.
  *     Stage 2: Error handling.
  *     -  Wathch dog
  *     -  Transmit timeout
  *
  *     Stage 3: Basic offloading support.
+ *      -  Use pci_map_page on scattered sk_buff for HIGHMEM support
  *      -  Implement scatter-gather offloading.
  *         A system page per RX (buffer|descriptor)?
  *        Handle fraged sk_buff to TX descriptors.
  *      -  Implement scatter-gather offloading.
  *         A system page per RX (buffer|descriptor)?
  *        Handle fraged sk_buff to TX descriptors.
@@ -55,10 +53,11 @@
  *     Stage 6: CPU Load balancing.
  *     -  Implement MSI-X.
  *        Along with multiple RX queue, for CPU load balancing.
  *     Stage 6: CPU Load balancing.
  *     -  Implement MSI-X.
  *        Along with multiple RX queue, for CPU load balancing.
- *     -  Use Multiple TX Queue for Multiple CPU Transmit
- *        Simultaneously Without Lock.
  *
  *     Stage 7:
  *
  *     Stage 7:
+ *     -  Use NAPI instead of rx_tasklet?
+ *             PCC Support Both Packet Counter and Timeout Interrupt for
+ *             receive and transmit complete, does NAPI really needed?
  *     -  Cleanup/re-orginize code, performence tuneing(alignment etc...).
  *     -  Test and Release 1.0
  */
  *     -  Cleanup/re-orginize code, performence tuneing(alignment etc...).
  *     -  Test and Release 1.0
  */
@@ -76,70 +75,95 @@
 #include "jme.h"
 
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,21)
 #include "jme.h"
 
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,21)
-static struct net_device_stats *jme_get_stats(struct net_device *netdev)
+static struct net_device_stats *
+jme_get_stats(struct net_device *netdev)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        return &jme->stats;
 }
 #endif
 
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        return &jme->stats;
 }
 #endif
 
-static int jme_mdio_read(struct net_device *netdev, int phy, int reg)
+static int
+jme_mdio_read(struct net_device *netdev, int phy, int reg)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        int i, val;
 
         jwrite32(jme, JME_SMI, SMI_OP_REQ |
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        int i, val;
 
         jwrite32(jme, JME_SMI, SMI_OP_REQ |
-                                smi_phy_addr(phy) |
-                                smi_reg_addr(reg));
+                               smi_phy_addr(phy) |
+                               smi_reg_addr(reg));
 
        wmb();
         for (i = JME_PHY_TIMEOUT; i > 0; --i) {
 
        wmb();
         for (i = JME_PHY_TIMEOUT; i > 0; --i) {
-                udelay(1);
-                if (((val = jread32(jme, JME_SMI)) & SMI_OP_REQ) == 0)
-                        break;
+               udelay(1);
+               if (((val = jread32(jme, JME_SMI)) & SMI_OP_REQ) == 0)
+                       break;
         }
 
         if (i == 0) {
         }
 
         if (i == 0) {
-                jeprintk(netdev->name, "phy read timeout : %d\n", reg);
-                return (0);
+               jeprintk(netdev->name, "phy read timeout : %d\n", reg);
+               return 0;
         }
 
         }
 
-        return ((val & SMI_DATA_MASK) >> SMI_DATA_SHIFT);
+       return ((val & SMI_DATA_MASK) >> SMI_DATA_SHIFT);
 }
 
 }
 
-static void jme_mdio_write(struct net_device *netdev, int phy, int reg, int val)
+static void
+jme_mdio_write(struct net_device *netdev,
+                               int phy, int reg, int val)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        int i;
 
 {
        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));
+       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();
 
        wmb();
-        for (i = JME_PHY_TIMEOUT; i > 0; --i)
-       {
-                udelay(1);
-                if (((val = jread32(jme, JME_SMI)) & SMI_OP_REQ) == 0)
-                        break;
-        }
+       for (i = JME_PHY_TIMEOUT ; i > 0 ; --i) {
+               udelay(1);
+               if (((val = jread32(jme, JME_SMI)) & SMI_OP_REQ) == 0)
+                       break;
+       }
 
 
-        if (i == 0)
-                jeprintk(netdev->name, "phy write timeout : %d\n", reg);
+       if (i == 0)
+               jeprintk(netdev->name, "phy write timeout : %d\n", reg);
 
 
-        return;
+       return;
 }
 
 }
 
-static void jme_reset_mac_processor(struct jme_adapter *jme)
+__always_inline static void
+jme_reset_phy_processor(struct jme_adapter *jme)
 {
        __u32 val;
 
 {
        __u32 val;
 
-       val = jread32(jme, JME_GHC);
-       val |= GHC_SWRST;
-       jwrite32(jme, JME_GHC, val);
+       jme_mdio_write(jme->dev,
+                       jme->mii_if.phy_id,
+                       MII_ADVERTISE, ADVERTISE_ALL);
+
+       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;
+}
+
+
+__always_inline static void
+jme_reset_mac_processor(struct jme_adapter *jme)
+{
+       jwrite32(jme, JME_GHC, jme->reg_ghc | GHC_SWRST);
        udelay(2);
        udelay(2);
-       val &= ~GHC_SWRST;
-       jwrite32(jme, JME_GHC, val);
+       jwrite32(jme, JME_GHC, jme->reg_ghc);
        jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
        jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
        jwrite32(jme, JME_WFODP, 0);
        jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
        jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
        jwrite32(jme, JME_WFODP, 0);
@@ -148,13 +172,15 @@ static void jme_reset_mac_processor(struct jme_adapter *jme)
        jwrite32(jme, JME_GPREG1, 0);
 }
 
        jwrite32(jme, JME_GPREG1, 0);
 }
 
-__always_inline static void jme_clear_pm(struct jme_adapter *jme)
+__always_inline static void
+jme_clear_pm(struct jme_adapter *jme)
 {
        jwrite32(jme, JME_PMCS, 0xFFFF0000);
        pci_set_power_state(jme->pdev, PCI_D0);
 }
 
 {
        jwrite32(jme, JME_PMCS, 0xFFFF0000);
        pci_set_power_state(jme->pdev, PCI_D0);
 }
 
-static int jme_reload_eeprom(struct jme_adapter *jme)
+static int
+jme_reload_eeprom(struct jme_adapter *jme)
 {
        __u32 val;
        int i;
 {
        __u32 val;
        int i;
@@ -183,16 +209,18 @@ static int jme_reload_eeprom(struct jme_adapter *jme)
        }
        else
                return -EIO;
        }
        else
                return -EIO;
-       
+
        return 0;
 }
 
        return 0;
 }
 
-__always_inline static void jme_load_macaddr(struct net_device *netdev)
+static void
+jme_load_macaddr(struct net_device *netdev)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        unsigned char macaddr[6];
        __u32 val;
 
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        unsigned char macaddr[6];
        __u32 val;
 
+       spin_lock(&jme->macaddr_lock);
        val = jread32(jme, JME_RXUMA_LO);
        macaddr[0] = (val >>  0) & 0xFF;
        macaddr[1] = (val >>  8) & 0xFF;
        val = jread32(jme, JME_RXUMA_LO);
        macaddr[0] = (val >>  0) & 0xFF;
        macaddr[1] = (val >>  8) & 0xFF;
@@ -202,17 +230,63 @@ __always_inline static void jme_load_macaddr(struct net_device *netdev)
        macaddr[4] = (val >>  0) & 0xFF;
        macaddr[5] = (val >>  8) & 0xFF;
         memcpy(netdev->dev_addr, macaddr, 6);
        macaddr[4] = (val >>  0) & 0xFF;
        macaddr[5] = (val >>  8) & 0xFF;
         memcpy(netdev->dev_addr, macaddr, 6);
+       spin_unlock(&jme->macaddr_lock);
+}
+
+__always_inline static void
+jme_set_rx_pcc(struct jme_adapter *jme, int p)
+{
+       switch(p) {
+       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;
+       }
+
+       dprintk(jme->dev->name, "Switched to PCC_P%d\n", p);
 }
 
 }
 
-__always_inline static void jme_start_irq(struct jme_adapter *jme)
+static void
+jme_start_irq(struct jme_adapter *jme)
 {
 {
+       register struct dynpcc_info *dpi = &(jme->dpi);
+
+       jme_set_rx_pcc(jme, PCC_P1);
+
+       dpi->check_point        = jiffies + PCC_INTERVAL;
+       dpi->last_bytes         = NET_STAT(jme).rx_bytes;
+       dpi->last_pkts          = NET_STAT(jme).rx_packets;
+       dpi->cur                = PCC_P1;
+       dpi->attempt            = PCC_P1;
+       dpi->cnt                = 0;
+
+       jwrite32(jme, JME_PCCTX,
+                       ((60000 << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
+                       ((8 << PCCTX_SHIFT) & PCCTX_MASK) |
+                       PCCTXQ0_EN
+               );
+
        /*
         * Enable Interrupts
         */
        jwrite32(jme, JME_IENS, INTR_ENABLE);
 }
 
        /*
         * Enable Interrupts
         */
        jwrite32(jme, JME_IENS, INTR_ENABLE);
 }
 
-__always_inline static void jme_stop_irq(struct jme_adapter *jme)
+__always_inline static void
+jme_stop_irq(struct jme_adapter *jme)
 {
        /*
         * Disable Interrupts
 {
        /*
         * Disable Interrupts
@@ -221,23 +295,27 @@ __always_inline static void jme_stop_irq(struct jme_adapter *jme)
 }
 
 
 }
 
 
-__always_inline static void jme_enable_shadow(struct jme_adapter *jme)
+__always_inline static void
+jme_enable_shadow(struct jme_adapter *jme)
 {
        jwrite32(jme,
                 JME_SHBA_LO,
                 ((__u32)jme->shadow_dma & ~((__u32)0x1F)) | SHBA_POSTEN);
 }
 
 {
        jwrite32(jme,
                 JME_SHBA_LO,
                 ((__u32)jme->shadow_dma & ~((__u32)0x1F)) | SHBA_POSTEN);
 }
 
-__always_inline static void jme_disable_shadow(struct jme_adapter *jme)
+__always_inline static void
+jme_disable_shadow(struct jme_adapter *jme)
 {
        jwrite32(jme, JME_SHBA_LO, 0x0);
 }
 
 {
        jwrite32(jme, JME_SHBA_LO, 0x0);
 }
 
-static void jme_check_link(struct net_device *netdev)
+static int
+jme_check_link(struct net_device *netdev, int testonly)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
 {
        struct jme_adapter *jme = netdev_priv(netdev);
-       __u32 phylink, ghc, cnt = JME_AUTONEG_TIMEOUT;
+       __u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT;
        char linkmsg[32];
        char linkmsg[32];
+       int rc = 0;
 
        phylink = jread32(jme, JME_PHY_LINK);
 
 
        phylink = jread32(jme, JME_PHY_LINK);
 
@@ -245,13 +323,27 @@ static void jme_check_link(struct net_device *netdev)
                /*
                 * Keep polling for autoneg complete
                 */
                /*
                 * Keep polling for autoneg complete
                 */
-               while(!(phylink & PHY_LINK_AUTONEG_COMPLETE) && --cnt > 0) {
-                       mdelay(1);
+               while(!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) && --cnt > 0) {
+                       udelay(1);
                        phylink = jread32(jme, JME_PHY_LINK);
                }
 
                        phylink = jread32(jme, JME_PHY_LINK);
                }
 
+               if(jme->phylink == phylink) {
+                       rc = 1;
+                       goto out;
+               }
+               if(testonly)
+                       goto out;
+
+               jme->phylink = phylink;
+
                if(!cnt)
                if(!cnt)
-                       jeprintk(netdev->name, "Waiting autoneg timeout.\n");
+                       jeprintk(netdev->name,
+                               "Waiting speed resolve timeout.\n");
+
+               if(!(phylink & PHY_LINK_AUTONEG_COMPLETE))
+                       jprintk(netdev->name,
+                               "Link partener does not support AN.\n");
 
                switch(phylink & PHY_LINK_SPEED_MASK) {
                        case PHY_LINK_SPEED_10M:
 
                switch(phylink & PHY_LINK_SPEED_MASK) {
                        case PHY_LINK_SPEED_10M:
@@ -271,96 +363,151 @@ static void jme_check_link(struct net_device *netdev)
                                break;
                }
                 ghc |= (phylink & PHY_LINK_DUPLEX) ? GHC_DPX : 0;
                                break;
                }
                 ghc |= (phylink & PHY_LINK_DUPLEX) ? GHC_DPX : 0;
-               jwrite32(jme, JME_GHC, ghc);
+
                strcat(linkmsg, (phylink &PHY_LINK_DUPLEX) ?
                strcat(linkmsg, (phylink &PHY_LINK_DUPLEX) ?
-                                       "Full-Duplex" :
-                                       "Half-Duplex");
+                                       "Full-Duplex, " :
+                                       "Half-Duplex, ");
+
+               if(phylink & PHY_LINK_MDI_STAT)
+                       strcat(linkmsg, "MDI");
+               else
+                       strcat(linkmsg, "MDI-X");
 
                if(phylink & PHY_LINK_DUPLEX)
                        jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
                else
                        jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
 
                if(phylink & PHY_LINK_DUPLEX)
                        jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
                else
                        jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
-                                                  TXMCS_BACKOFF |
-                                                  TXMCS_CARRIERSENSE |
-                                                  TXMCS_COLLISION);
+                                               TXMCS_BACKOFF |
+                                               TXMCS_CARRIERSENSE |
+                                               TXMCS_COLLISION);
+
+               jme->reg_ghc = ghc;
+               jwrite32(jme, JME_GHC, ghc);
 
                jprintk(netdev->name, "Link is up at %s.\n", linkmsg);
                 netif_carrier_on(netdev);
        }
         else {
 
                jprintk(netdev->name, "Link is up at %s.\n", linkmsg);
                 netif_carrier_on(netdev);
        }
         else {
+               if(testonly)
+                       goto out;
+
                jprintk(netdev->name, "Link is down.\n");
                jprintk(netdev->name, "Link is down.\n");
+               jme->phylink = 0;
                 netif_carrier_off(netdev);
        }
                 netif_carrier_off(netdev);
        }
+
+out:
+       return rc;
 }
 
 }
 
-static void jme_link_change_tasklet(unsigned long arg)
+
+static int
+jme_alloc_txdesc(struct jme_adapter *jme,
+                       int nr_alloc)
 {
 {
-       struct jme_adapter *jme = (struct jme_adapter*)arg;
-       jme_check_link(jme->dev);
+       struct jme_ring *txring = jme->txring;
+       int idx;
+
+       idx = txring->next_to_use;
+
+       if(unlikely(txring->nr_free < nr_alloc))
+               return -1;
+
+       spin_lock(&jme->tx_lock);
+       txring->nr_free -= nr_alloc;
+
+       if((txring->next_to_use += nr_alloc) >= RING_DESC_NR)
+               txring->next_to_use -= RING_DESC_NR;
+       spin_unlock(&jme->tx_lock);
+
+       return idx;
 }
 
 }
 
-static void jme_set_new_txdesc(struct jme_adapter *jme,
-                              int i, struct sk_buff *skb)
+static int
+jme_set_new_txdesc(struct jme_adapter *jme,
+                       struct sk_buff *skb)
 {
        struct jme_ring *txring = jme->txring;
 {
        struct jme_ring *txring = jme->txring;
-       register struct TxDesc* txdesc = txring->desc;
-       struct jme_buffer_info *txbi = txring->bufinf;
+       volatile struct txdesc *txdesc = txring->desc, *ctxdesc;
+       struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
        dma_addr_t dmaaddr;
        dma_addr_t dmaaddr;
+       int i, idx, nr_desc;
 
 
-       txdesc += i;
-       txbi += i;
+       nr_desc = 2;
+       idx = jme_alloc_txdesc(jme, nr_desc);
 
 
-       dmaaddr = pci_map_single(jme->pdev,
-                                skb->data,
-                                skb->len,
-                                PCI_DMA_TODEVICE);
+       if(unlikely(idx<0))
+               return NETDEV_TX_BUSY;
 
 
-       pci_dma_sync_single_for_device(jme->pdev,
-                                      dmaaddr,
-                                      skb->len,
-                                      PCI_DMA_TODEVICE);
-       
-       txdesc->dw[0] = 0;
-       txdesc->dw[1] = 0;
-       txdesc->dw[2] = 0;
-       txdesc->desc1.bufaddr = cpu_to_le32(dmaaddr);
-       txdesc->desc1.datalen = cpu_to_le16(skb->len);
-       txdesc->desc1.pktsize = cpu_to_le16(skb->len);
+       for(i = 1 ; i < nr_desc  ; ++i) {
+               ctxdesc = txdesc + ((idx + i) & (RING_DESC_NR-1));
+               ctxbi = txbi + ((idx + i) & (RING_DESC_NR-1));
+
+               dmaaddr = pci_map_single(jme->pdev,
+                                        skb->data,
+                                        skb->len,
+                                        PCI_DMA_TODEVICE);
+
+               pci_dma_sync_single_for_device(jme->pdev,
+                                              dmaaddr,
+                                              skb->len,
+                                              PCI_DMA_TODEVICE);
+
+               ctxdesc->dw[0] = 0;
+               ctxdesc->dw[1] = 0;
+               ctxdesc->desc2.flags    = TXFLAG_OWN;
+               if(jme->dev->features & NETIF_F_HIGHDMA)
+                       ctxdesc->desc2.flags |= TXFLAG_64BIT;
+               ctxdesc->desc2.datalen  = cpu_to_le16(skb->len);
+               ctxdesc->desc2.bufaddrh = cpu_to_le32((__u64)dmaaddr >> 32);
+               ctxdesc->desc2.bufaddrl = cpu_to_le32(
+                                               (__u64)dmaaddr & 0xFFFFFFFFUL);
+
+               ctxbi->mapping = dmaaddr;
+               ctxbi->len = skb->len;
+       }
+
+       ctxdesc = txdesc + idx;
+       ctxbi = txbi + idx;
+
+       ctxdesc->dw[0] = 0;
+       ctxdesc->dw[1] = 0;
+       ctxdesc->dw[2] = 0;
+       ctxdesc->dw[3] = 0;
+       ctxdesc->desc1.pktsize = cpu_to_le16(skb->len);
        /*
         * Set OWN bit at final.
        /*
         * Set OWN bit at final.
-        * When kernel transmit faster than NIC last packet sent,
-        * and NIC trying to send this descriptor before we tell
+        * 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();
         * it to start sending this TX queue.
         * Other fields are already filled correctly.
         */
        wmb();
-       txdesc->desc1.flags = TXFLAG_OWN | TXFLAG_INT;
-       txbi->skb = skb;
-       txbi->mapping = dmaaddr;
-       txbi->len = skb->len;
-
-#ifdef TX_QUEUE_DEBUG
-       dprintk(jme->dev->name, "TX Ring Buf Address(%08x,%08x,%d).\n",
-               dmaaddr,
-               (txdesc->all[12] <<  0) |
-               (txdesc->all[13] <<  8) |
-               (txdesc->all[14] << 16) |
-               (txdesc->all[15] << 24),
-               (txdesc->all[4]  <<  0) |
-               (txdesc->all[5]  <<  8));
-#endif
+       ctxdesc->desc1.flags = TXFLAG_OWN | TXFLAG_INT;
+       /*
+        * Set tx buffer info after telling NIC to send
+        * For better tx_clean timing
+        */
+       wmb();
+       ctxbi->nr_desc = nr_desc;
+       ctxbi->skb = skb;
+
+       tx_dbg(jme->dev->name, "Xmit: %d+%d\n", idx, nr_desc);
 
 
+       return 0;
 }
 
 
 }
 
 
-static int jme_setup_tx_resources(struct jme_adapter *jme)
+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,
 {
        struct jme_ring *txring = &(jme->txring[0]);
 
        txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
                                           TX_RING_ALLOC_SIZE,
-                                          &(txring->dmaalloc), 
-                                          GFP_KERNEL);
+                                          &(txring->dmaalloc),
+                                          GFP_ATOMIC);
+
        if(!txring->alloc) {
                txring->desc = NULL;
                txring->dmaalloc = 0;
        if(!txring->alloc) {
                txring->desc = NULL;
                txring->dmaalloc = 0;
@@ -371,61 +518,61 @@ static int jme_setup_tx_resources(struct jme_adapter *jme)
        /*
         * 16 Bytes align
         */
        /*
         * 16 Bytes align
         */
-       txring->desc            = (void*)ALIGN((unsigned long)(txring->alloc), RING_DESC_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;
        txring->next_to_clean   = 0;
        txring->dma             = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
        txring->next_to_use     = 0;
        txring->next_to_clean   = 0;
-
-#ifdef TX_QUEUE_DEBUG
-       dprintk(jme->dev->name, "TX Ring Base Address(%08x,%08x).\n",
-               (__u32)txring->desc,
-               txring->dma);
-#endif
+       txring->nr_free         = RING_DESC_NR;
 
        /*
         * Initiallize Transmit Descriptors
         */
        memset(txring->alloc, 0, TX_RING_ALLOC_SIZE);
 
        /*
         * Initiallize Transmit Descriptors
         */
        memset(txring->alloc, 0, TX_RING_ALLOC_SIZE);
-       memset(txring->bufinf, 0, sizeof(struct jme_buffer_info) * RING_DESC_NR);
+       memset(txring->bufinf, 0,
+               sizeof(struct jme_buffer_info) * RING_DESC_NR);
 
        return 0;
 }
 
 
        return 0;
 }
 
-static void jme_free_tx_resources(struct jme_adapter *jme)
+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) {
 {
        int i;
        struct jme_ring *txring = &(jme->txring[0]);
        struct jme_buffer_info *txbi = txring->bufinf;
 
        if(txring->alloc) {
-               for(i=0;i<RING_DESC_NR;++i) {
+               for(i = 0 ; i < RING_DESC_NR ; ++i) {
                        txbi = txring->bufinf + i;
                        if(txbi->skb) {
                                dev_kfree_skb(txbi->skb);
                                txbi->skb = NULL;
                        txbi = txring->bufinf + i;
                        if(txbi->skb) {
                                dev_kfree_skb(txbi->skb);
                                txbi->skb = NULL;
-                               txbi->mapping = 0;
-                               txbi->len = 0;
                        }
                        }
+                       txbi->mapping   = 0;
+                       txbi->len       = 0;
+                       txbi->nr_desc   = 0;
                }
 
                dma_free_coherent(&(jme->pdev->dev),
                                  TX_RING_ALLOC_SIZE,
                                  txring->alloc,
                                  txring->dmaalloc);
                }
 
                dma_free_coherent(&(jme->pdev->dev),
                                  TX_RING_ALLOC_SIZE,
                                  txring->alloc,
                                  txring->dmaalloc);
-               txring->alloc    = NULL;
-               txring->desc     = NULL;
-               txring->dmaalloc = 0;
-               txring->dma      = 0;
+
+               txring->alloc           = NULL;
+               txring->desc            = NULL;
+               txring->dmaalloc        = 0;
+               txring->dma             = 0;
        }
        }
-       txring->next_to_use   = 0;
-       txring->next_to_clean = 0;
+       txring->next_to_use     = 0;
+       txring->next_to_clean   = 0;
+       txring->nr_free         = 0;
 
 }
 
 
 }
 
-__always_inline static void jme_enable_tx_engine(struct jme_adapter *jme)
+__always_inline static void
+jme_enable_tx_engine(struct jme_adapter *jme)
 {
 {
-       __u8 mrrs;
-
        /*
         * Select Queue 0
         */
        /*
         * Select Queue 0
         */
@@ -434,30 +581,15 @@ __always_inline static void jme_enable_tx_engine(struct jme_adapter *jme)
        /*
         * Setup TX Queue 0 DMA Bass Address
         */
        /*
         * Setup TX Queue 0 DMA Bass Address
         */
-       jwrite32(jme, JME_TXDBA, jme->txring[0].dma);
-       jwrite32(jme, JME_TXNDA, jme->txring[0].dma);
+       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, RING_DESC_NR);
 
 
        /*
         * Setup TX Descptor Count
         */
        jwrite32(jme, JME_TXQDC, RING_DESC_NR);
 
-       /*
-        * Get Max Read Req Size from PCI Config Space
-        */
-       pci_read_config_byte(jme->pdev, PCI_CONF_DCSR_MRRS, &mrrs);
-       switch(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;
-       };
-
        /*
         * Enable TX Engine
         */
        /*
         * Enable TX Engine
         */
@@ -468,7 +600,8 @@ __always_inline static void jme_enable_tx_engine(struct jme_adapter *jme)
 
 }
 
 
 }
 
-__always_inline static void jme_disable_tx_engine(struct jme_adapter *jme)
+__always_inline static void
+jme_disable_tx_engine(struct jme_adapter *jme)
 {
        int i;
        __u32 val;
 {
        int i;
        __u32 val;
@@ -476,12 +609,12 @@ __always_inline static void jme_disable_tx_engine(struct jme_adapter *jme)
        /*
         * Disable TX Engine
         */
        /*
         * Disable TX Engine
         */
-       jwrite32(jme, JME_TXCS, jme->reg_txcs);
+       jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
 
        val = jread32(jme, JME_TXCS);
        for(i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i)
        {
 
        val = jread32(jme, JME_TXCS);
        for(i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i)
        {
-               udelay(1);
+               mdelay(1);
                val = jread32(jme, JME_TXCS);
        }
 
                val = jread32(jme, JME_TXCS);
        }
 
@@ -491,36 +624,29 @@ __always_inline static void jme_disable_tx_engine(struct jme_adapter *jme)
 
 }
 
 
 }
 
-static void jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
+static void
+jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
 {
        struct jme_ring *rxring = jme->rxring;
 {
        struct jme_ring *rxring = jme->rxring;
-       register struct RxDesc* rxdesc = rxring->desc;
+       register volatile struct rxdesc* rxdesc = rxring->desc;
        struct jme_buffer_info *rxbi = rxring->bufinf;
        rxdesc += i;
        rxbi += i;
 
        rxdesc->dw[0] = 0;
        rxdesc->dw[1] = 0;
        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(rxbi->mapping);
-       rxdesc->desc1.datalen = cpu_to_le16(RX_BUF_SIZE);
+       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();
        wmb();
-       rxdesc->desc1.flags = RXFLAG_OWN | RXFLAG_INT;
-
-#ifdef RX_QUEUE_DEBUG
-       dprintk(jme->dev->name, "RX Ring Buf Address(%08x,%08x,%d).\n",
-               rxbi->mapping,
-               (rxdesc->all[12] <<  0) |
-               (rxdesc->all[13] <<  8) |
-               (rxdesc->all[14] << 16) |
-               (rxdesc->all[15] << 24),
-               (rxdesc->all[4]  <<  0) |
-               (rxdesc->all[5]  <<  8));
-#endif
-
+       rxdesc->desc1.flags     |= RXFLAG_OWN | RXFLAG_INT;
 }
 
 }
 
-static int jme_make_new_rx_buf(struct jme_adapter *jme, int i)
+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;
 {
        struct jme_ring *rxring = &(jme->rxring[0]);
        struct jme_buffer_info *rxbi = rxring->bufinf;
@@ -530,31 +656,33 @@ static int jme_make_new_rx_buf(struct jme_adapter *jme, int i)
        skb = netdev_alloc_skb(jme->dev, RX_BUF_ALLOC_SIZE);
        if(unlikely(!skb))
                return -ENOMEM;
        skb = netdev_alloc_skb(jme->dev, RX_BUF_ALLOC_SIZE);
        if(unlikely(!skb))
                return -ENOMEM;
-       if(unlikely(skb_shinfo(skb)->nr_frags)) {
-               dprintk(jme->dev->name, "Allocated skb fragged(%d).\n", skb_shinfo(skb)->nr_frags);
+
+       if(unlikely(skb_is_nonlinear(skb))) {
+               dprintk(jme->dev->name,
+                       "Allocated skb fragged(%d).\n",
+                       skb_shinfo(skb)->nr_frags);
                dev_kfree_skb(skb);
                return -ENOMEM;
        }
 
                dev_kfree_skb(skb);
                return -ENOMEM;
        }
 
-
-       if(unlikely(
-               offset = 
-               (unsigned long)(skb->data)
-               & (unsigned long)(RX_BUF_DMA_ALIGN - 1))) {
+       if(unlikely(offset =
+                       (unsigned long)(skb->data)
+                       & (unsigned long)(RX_BUF_DMA_ALIGN - 1)))
                skb_reserve(skb, RX_BUF_DMA_ALIGN - offset);
                skb_reserve(skb, RX_BUF_DMA_ALIGN - offset);
-       }
 
        rxbi += i;
        rxbi->skb = skb;
 
        rxbi += i;
        rxbi->skb = skb;
+       rxbi->len = skb_tailroom(skb);
        rxbi->mapping = pci_map_single(jme->pdev,
                                       skb->data,
        rxbi->mapping = pci_map_single(jme->pdev,
                                       skb->data,
-                                      RX_BUF_SIZE,
+                                      rxbi->len,
                                       PCI_DMA_FROMDEVICE);
 
        return 0;
 }
 
                                       PCI_DMA_FROMDEVICE);
 
        return 0;
 }
 
-static void jme_free_rx_buf(struct jme_adapter *jme, int i)
+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;
 {
        struct jme_ring *rxring = &(jme->rxring[0]);
        struct jme_buffer_info *rxbi = rxring->bufinf;
@@ -563,23 +691,48 @@ static void jme_free_rx_buf(struct jme_adapter *jme, int i)
        if(rxbi->skb) {
                pci_unmap_single(jme->pdev,
                                 rxbi->mapping,
        if(rxbi->skb) {
                pci_unmap_single(jme->pdev,
                                 rxbi->mapping,
-                                RX_BUF_SIZE,
+                                rxbi->len,
                                 PCI_DMA_FROMDEVICE);
                dev_kfree_skb(rxbi->skb);
                rxbi->skb = NULL;
                rxbi->mapping = 0;
                                 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 < RING_DESC_NR ; ++i)
+                       jme_free_rx_buf(jme, i);
+
+               dma_free_coherent(&(jme->pdev->dev),
+                                 RX_RING_ALLOC_SIZE,
+                                 rxring->alloc,
+                                 rxring->dmaalloc);
+               rxring->alloc    = NULL;
+               rxring->desc     = NULL;
+               rxring->dmaalloc = 0;
+               rxring->dma      = 0;
        }
        }
+       rxring->next_to_use   = 0;
+       rxring->next_to_clean = 0;
 }
 
 }
 
-static int jme_setup_rx_resources(struct jme_adapter *jme)
+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,
 {
        int i;
        struct jme_ring *rxring = &(jme->rxring[0]);
 
        rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
                                           RX_RING_ALLOC_SIZE,
-                                          &(rxring->dmaalloc), 
-                                          GFP_KERNEL);
+                                          &(rxring->dmaalloc),
+                                          GFP_ATOMIC);
        if(!rxring->alloc) {
                rxring->desc = NULL;
                rxring->dmaalloc = 0;
        if(!rxring->alloc) {
                rxring->desc = NULL;
                rxring->dmaalloc = 0;
@@ -590,92 +743,51 @@ static int jme_setup_rx_resources(struct jme_adapter *jme)
        /*
         * 16 Bytes align
         */
        /*
         * 16 Bytes align
         */
-       rxring->desc            = (void*)ALIGN((unsigned long)(rxring->alloc), RING_DESC_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;
        rxring->next_to_clean   = 0;
 
        rxring->dma             = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
        rxring->next_to_use     = 0;
        rxring->next_to_clean   = 0;
 
-#ifdef RX_QUEUE_DEBUG
-       dprintk(jme->dev->name, "RX Ring Base Address(%08x,%08x).\n",
-               (__u32)rxring->desc,
-               rxring->dma);
-#endif
-
        /*
         * Initiallize Receive Descriptors
         */
        for(i = 0 ; i < RING_DESC_NR ; ++i) {
        /*
         * Initiallize Receive Descriptors
         */
        for(i = 0 ; i < RING_DESC_NR ; ++i) {
-               if(unlikely(jme_make_new_rx_buf(jme, i)))
-                       break;
+               if(unlikely(jme_make_new_rx_buf(jme, i))) {
+                       jme_free_rx_resources(jme);
+                       return -ENOMEM;
+               }
 
                jme_set_clean_rxdesc(jme, i);
        }
 
 
                jme_set_clean_rxdesc(jme, i);
        }
 
-       /*
-        * Cleanup allocated memories when error
-        */
-       if(i != RING_DESC_NR) {
-               for(--i ; i >= 0 ; --i)
-                       jme_free_rx_buf(jme, i);
-
-               dma_free_coherent(&(jme->pdev->dev),
-                                 RX_RING_ALLOC_SIZE,
-                                 rxring->alloc,
-                                 rxring->dmaalloc);
-               rxring->alloc    = NULL;
-               rxring->desc     = NULL;
-               rxring->dmaalloc = 0;
-               rxring->dma      = 0;
-               return -ENOMEM;
-       }
-
        return 0;
 }
 
        return 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 < RING_DESC_NR ; ++i)
-                       jme_free_rx_buf(jme, i);
-
-               dma_free_coherent(&(jme->pdev->dev),
-                                 RX_RING_ALLOC_SIZE,
-                                 rxring->alloc,
-                                 rxring->dmaalloc);
-               rxring->alloc    = NULL;
-               rxring->desc     = NULL;
-               rxring->dmaalloc = 0;
-               rxring->dma      = 0;
-       }
-       rxring->next_to_use   = 0;
-       rxring->next_to_clean = 0;
-}
-
-__always_inline static void jme_enable_rx_engine(struct jme_adapter *jme)
+__always_inline static void
+jme_enable_rx_engine(struct jme_adapter *jme)
 {
        /*
         * Setup RX DMA Bass Address
         */
 {
        /*
         * Setup RX DMA Bass Address
         */
-       jwrite32(jme, JME_RXDBA, jme->rxring[0].dma);
-       jwrite32(jme, JME_RXNDA, jme->rxring[0].dma);
+       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 Descptor Count
         */
        jwrite32(jme, JME_RXQDC, RING_DESC_NR);
 
 
        /*
         * Setup RX Descptor Count
         */
        jwrite32(jme, JME_RXQDC, RING_DESC_NR);
 
-       /* 
+       /*
         * Setup Unicast Filter
         */
         * Setup Unicast Filter
         */
+       jme->reg_rxmcs = RXMCS_VTAGRM | RXMCS_PREPAD;
        jme_set_multi(jme->dev);
 
        /*
         * Enable RX Engine
         */
        jme_set_multi(jme->dev);
 
        /*
         * Enable RX Engine
         */
-
        wmb();
        jwrite32(jme, JME_RXCS, RXCS_DEFAULT |
                                RXCS_QUEUESEL_Q0 |
        wmb();
        jwrite32(jme, JME_RXCS, RXCS_DEFAULT |
                                RXCS_QUEUESEL_Q0 |
@@ -683,10 +795,11 @@ __always_inline static void jme_enable_rx_engine(struct jme_adapter *jme)
                                RXCS_QST);
 }
 
                                RXCS_QST);
 }
 
-__always_inline static void jme_restart_rx_engine(struct jme_adapter *jme)
+__always_inline static void
+jme_restart_rx_engine(struct jme_adapter *jme)
 {
        /*
 {
        /*
-        * Enable RX Engine
+        * Start RX Engine
         */
        jwrite32(jme, JME_RXCS, RXCS_DEFAULT |
                                RXCS_QUEUESEL_Q0 |
         */
        jwrite32(jme, JME_RXCS, RXCS_DEFAULT |
                                RXCS_QUEUESEL_Q0 |
@@ -695,7 +808,8 @@ __always_inline static void jme_restart_rx_engine(struct jme_adapter *jme)
 }
 
 
 }
 
 
-__always_inline static void jme_disable_rx_engine(struct jme_adapter *jme)
+__always_inline static void
+jme_disable_rx_engine(struct jme_adapter *jme)
 {
        int i;
        __u32 val;
 {
        int i;
        __u32 val;
@@ -710,7 +824,7 @@ __always_inline static void jme_disable_rx_engine(struct jme_adapter *jme)
        val = jread32(jme, JME_RXCS);
        for(i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i)
        {
        val = jread32(jme, JME_RXCS);
        for(i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i)
        {
-               udelay(1);
+               mdelay(100);
                val = jread32(jme, JME_RXCS);
        }
 
                val = jread32(jme, JME_RXCS);
        }
 
@@ -719,206 +833,347 @@ __always_inline static void jme_disable_rx_engine(struct jme_adapter *jme)
 
 }
 
 
 }
 
-static void jme_tx_clean_tasklet(unsigned long arg)
+static void
+jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
 {
 {
-       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;
+       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(jiffies >= dpi->check_point) {
+               if(jiffies > (dpi->check_point + PCC_INTERVAL))
+                       jme_attempt_pcc(dpi, PCC_P1);
+               else if((NET_STAT(jme).rx_bytes - dpi->last_bytes) >
+                                                       PCC_P3_THRESHOLD)
+                       jme_attempt_pcc(dpi, PCC_P3);
+               else if((NET_STAT(jme).rx_bytes - dpi->last_bytes) >
+                                                       PCC_P2_THRESHOLD)
+                       jme_attempt_pcc(dpi, PCC_P2);
+               else
+                       jme_attempt_pcc(dpi, PCC_P1);
+
+               if(unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
+                       jme_set_rx_pcc(jme, dpi->attempt);
+                       dpi->cur = dpi->attempt;
+                       dpi->cnt = 0;
+               }
+
+               dpi->last_bytes = NET_STAT(jme).rx_bytes;
+               dpi->last_pkts  = NET_STAT(jme).rx_packets;
+               dpi->check_point = jiffies + PCC_INTERVAL;
+       }
+}
+
+static void
+jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
+{
+       struct jme_ring *rxring = &(jme->rxring[0]);
+       volatile struct rxdesc *rxdesc = rxring->desc;
+       struct jme_buffer_info *rxbi = rxring->bufinf;
        struct sk_buff *skb;
        struct sk_buff *skb;
-       int i, end;
+       int framesize;
 
 
-#ifdef TX_TASKLET_DEBUG
-       dprintk(jme->dev->name, "into tasklet\n");
-#endif
+       rxdesc += idx;
+       rxbi += idx;
 
 
-       end = txring->next_to_use;
-       for(i = txring->next_to_clean ; i != end ; ) {
-               ctxbi = txbi + i;
-               skb = ctxbi->skb;
-               if(skb && !(txdesc[i].desc1.flags & TXFLAG_OWN)) {
+       skb = rxbi->skb;
+       pci_dma_sync_single_for_cpu(jme->pdev,
+                                       rxbi->mapping,
+                                       rxbi->len,
+                                       PCI_DMA_FROMDEVICE);
 
 
-#ifdef TX_TASKLET_DEBUG
-                       dprintk(jme->dev->name, "cleaning %d\n", i);
-#endif
+       if(unlikely(jme_make_new_rx_buf(jme, idx))) {
+               pci_dma_sync_single_for_device(jme->pdev,
+                                               rxbi->mapping,
+                                               rxbi->len,
+                                               PCI_DMA_FROMDEVICE);
 
 
-                       pci_unmap_single(jme->pdev,
-                                        ctxbi->mapping,
-                                        skb->len,
-                                        PCI_DMA_TODEVICE);
+               ++(NET_STAT(jme).rx_dropped);
+       }
+       else {
+               framesize = le16_to_cpu(rxdesc->descwb.framesize)
+                               - RX_PREPAD_SIZE;
 
 
-                       dev_kfree_skb(skb);
-                       prefetch(txbi + i + 1);
-                       prefetch(txdesc + i + 1);
-                       ctxbi->skb = NULL;
-                       ctxbi->mapping = 0;
-                       ctxbi->len = skb->len;
-               }
-               else {
-                       break;
-               }
+               skb_reserve(skb, RX_PREPAD_SIZE);
+               skb_put(skb, framesize);
+               skb->protocol = eth_type_trans(skb, jme->dev);
 
 
-               if(unlikely(++i == RING_DESC_NR))
-                       i = 0;
+               netif_rx(skb);
+
+               if(le16_to_cpu(rxdesc->descwb.flags) & RXWBFLAG_DEST_MUL)
+                       ++(NET_STAT(jme).multicast);
+
+               jme->dev->last_rx = jiffies;
+               NET_STAT(jme).rx_bytes += framesize;
+               ++(NET_STAT(jme).rx_packets);
        }
        }
-       txring->next_to_clean = i;
+
+       jme_set_clean_rxdesc(jme, idx);
+
+       jme_dynamic_pcc(jme);
 
 }
 
 
 }
 
-static void jme_process_receive(struct jme_adapter *jme)
+static int
+jme_process_receive(struct jme_adapter *jme, int limit)
 {
 {
-       struct net_device *netdev = jme->dev;
        struct jme_ring *rxring = &(jme->rxring[0]);
        struct jme_ring *rxring = &(jme->rxring[0]);
-       struct RxDesc *rxdesc = rxring->desc;
-       struct jme_buffer_info *rxbi;
-       struct sk_buff *skb;
-       dma_addr_t buf_dma;
-       int i, j, start, cnt, ccnt;
-       unsigned int framesize, desccnt;
+       volatile struct rxdesc *rxdesc = rxring->desc;
+       int i, j, ccnt, desccnt;
 
 
-       /*
-        * Assume that one descriptor per frame,
-        * Should be fixed in the future
-        * (or not? If buffer already large enough to store entire packet.)
-        */
-
-       spin_lock(&jme->recv_lock);
-       i = start = rxring->next_to_clean;
-       /*
-        * Decide how many descriptors need to be processed
-        * In the worst cast we'll have to process entire queue
-        */
-       for(cnt = 0 ; cnt < RING_DESC_NR ; )
+       i = rxring->next_to_clean;
+       while( limit-- > 0 )
        {
        {
-               rxdesc = (struct RxDesc*)(rxring->desc) + i;
+               rxdesc = rxring->desc;
+               rxdesc += i;
+
                if((rxdesc->descwb.flags & RXWBFLAG_OWN) ||
                if((rxdesc->descwb.flags & RXWBFLAG_OWN) ||
-                  !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL)
-               ) {
-                       rxring->next_to_clean = i;
-                       break;
-               }
+               !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
+                       goto out;
 
                desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
 
 
                desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
 
-               if(unlikely((cnt += desccnt) >= RING_DESC_NR)) {
-                       cnt -= desccnt;
-                       break;
-               }
+               rx_dbg(jme->dev->name, "RX: Cleaning %d\n", i);
 
 
-               if(unlikely((i += desccnt) >= RING_DESC_NR))
-                       i -= RING_DESC_NR;
-       }
-       spin_unlock(&jme->recv_lock);
+               if(desccnt > 1 ||
+               rxdesc->descwb.errstat & RXWBERR_ALLERR) {
 
 
-       /*
-        * Process descriptors independently accross cpu
-        *      --- save for multiple cpu handling
-        */
-       for( i = start ; cnt-- ; ) {
-               rxdesc = (struct RxDesc*)(rxring->desc) + i;
-               desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
-               rxbi = rxring->bufinf + i;
-               if(unlikely(
-                       /*
-                        * Drop and record error packet
-                        */
-                       rxdesc->descwb.errstat & RXWBERR_ALLERR ||
-                       desccnt > 1)) {
-                       if(rxdesc->descwb.errstat & RXWBERR_OVERUN)
-                               ++(NET_STAT.rx_fifo_errors);
-                       else if(rxdesc->descwb.errstat & RXWBERR_CRCERR)
-                               ++(NET_STAT.rx_frame_errors);
-                       else {
-                               ++(NET_STAT.rx_errors);
-#ifdef RX_ERR_DEBUG
-                               dprintk(netdev->name, "err: %02x\n", rxdesc->descwb.errstat);
-#endif
-                       }
+                       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)
 
                        if(desccnt > 1)
-                               cnt -= desccnt-1;
+                               limit -= desccnt - 1;
 
 
-                       for(j=i,ccnt=desccnt;ccnt--;) {
+                       for(j = i, ccnt = desccnt ; ccnt-- ; ) {
                                jme_set_clean_rxdesc(jme, j);
 
                                if(unlikely(++j == RING_DESC_NR))
                                        j = 0;
                        }
                                jme_set_clean_rxdesc(jme, j);
 
                                if(unlikely(++j == RING_DESC_NR))
                                        j = 0;
                        }
+
                }
                else {
                }
                else {
-                       /*
-                       * Pass received packet to kernel
-                       */
-                       skb = rxbi->skb;
-                       buf_dma = rxbi->mapping;
-                       pci_dma_sync_single_for_cpu(jme->pdev,
-                                                   buf_dma,
-                                                   RX_BUF_SIZE,
-                                                   PCI_DMA_FROMDEVICE);
-
-                       if(unlikely(jme_make_new_rx_buf(jme, i))) {
-                               pci_dma_sync_single_for_device(jme->pdev,
-                                                              buf_dma,
-                                                              RX_BUF_SIZE,
-                                                              PCI_DMA_FROMDEVICE);
-                               ++(NET_STAT.rx_dropped);
-                       }
-                       else {
-                               framesize = le16_to_cpu(rxdesc->descwb.framesize);
+                       jme_alloc_and_feed_skb(jme, i);
+               }
 
 
-                               skb_put(skb, framesize);
-                               skb->protocol = eth_type_trans(skb, netdev);
 
 
-                               netif_rx(skb);
+               if((i += desccnt) >= RING_DESC_NR)
+                       i -= RING_DESC_NR;
+       }
 
 
-                               if(le16_to_cpu(rxdesc->descwb.flags) & RXWBFLAG_DEST_MUL)
-                                       ++(NET_STAT.multicast);
+out:
+       rx_dbg(jme->dev->name, "RX: Stop at %d\n", i);
+       rx_dbg(jme->dev->name, "RX: RXNDA offset %d\n",
+               (jread32(jme, JME_RXNDA) - jread32(jme, JME_RXDBA_LO))
+                       >> 4);
 
 
-                               netdev->last_rx = jiffies;
-                               NET_STAT.rx_bytes += framesize;
-                               ++(NET_STAT.rx_packets);
-                       }
+       rxring->next_to_clean = i;
 
 
-                       jme_set_clean_rxdesc(jme, i);
-
-#ifdef RX_PKT_DEBUG
-                       dprintk(netdev->name, "DESCCNT: %u, FSIZE: %u, ADDRH: %08x, "
-                               "ADDRL: %08x, FLAGS: %04x, STAT: %02x, "
-                               "DST:%02x:%02x:%02x:%02x:%02x:%02x\n",
-                               desccnt,
-                               framesize,
-                               le32_to_cpu(rxdesc->dw[2]),
-                               le32_to_cpu(rxdesc->dw[3]),
-                               le16_to_cpu(rxdesc->descwb.flags),
-                               rxdesc->descwb.errstat,
-                               rxbuf[0], rxbuf[1], rxbuf[2],
-                               rxbuf[3], rxbuf[4], rxbuf[5]);
-#endif
+       return limit > 0 ? limit : 0;
+
+}
 
 
+static void
+jme_link_change_tasklet(unsigned long arg)
+{
+       struct jme_adapter *jme = (struct jme_adapter*)arg;
+       struct net_device *netdev = jme->dev;
+       int timeout = WAIT_TASKLET_TIMEOUT;
+       int rc;
 
 
+       if(!atomic_dec_and_test(&jme->link_changing))
+               goto out;
+
+       if(jme_check_link(netdev, 1))
+               goto out;
+
+       netif_stop_queue(netdev);
+
+       while(--timeout > 0 &&
+               (
+               atomic_read(&jme->rx_cleaning) != 1 ||
+               atomic_read(&jme->tx_cleaning) != 1
+               )) {
+
+               mdelay(1);
+       }
+
+       if(netif_carrier_ok(netdev)) {
+               jme_reset_mac_processor(jme);
+               jme_free_rx_resources(jme);
+               jme_free_tx_resources(jme);
+       }
+
+       jme_check_link(netdev, 0);
+       if(netif_carrier_ok(netdev)) {
+               rc = jme_setup_rx_resources(jme);
+               if(rc) {
+                       jeprintk(netdev->name,
+                               "Allocating resources for RX error"
+                               ", Device STOPPED!\n");
+                       goto out;
                }
 
 
                }
 
 
-               if(unlikely((i+=desccnt) >= RING_DESC_NR))
-                       i -= RING_DESC_NR;
+               rc = jme_setup_tx_resources(jme);
+               if(rc) {
+                       jeprintk(netdev->name,
+                               "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);
        }
 
        }
 
+       goto out;
+
+err_out_free_rx_resources:
+       jme_free_rx_resources(jme);
+out:
+       atomic_inc(&jme->link_changing);
 }
 
 }
 
-static void jme_rx_clean_tasklet(unsigned long arg)
+static void
+jme_rx_clean_tasklet(unsigned long arg)
 {
        struct jme_adapter *jme = (struct jme_adapter*)arg;
 {
        struct jme_adapter *jme = (struct jme_adapter*)arg;
+
+       if(!atomic_dec_and_test(&jme->rx_cleaning))
+               goto out;
        
        
-       jme_process_receive(jme);
-       if(jme->flags & JME_FLAG_RXQ0_EMPTY) {
-               jme_restart_rx_engine(jme);
-               jme->flags &= ~JME_FLAG_RXQ0_EMPTY;
+       if(atomic_read(&jme->link_changing) != 1)
+               goto out;
+
+       if(unlikely(netif_queue_stopped(jme->dev)))
+               goto out;
+
+       jme_process_receive(jme, RING_DESC_NR);
+
+out:
+       atomic_inc(&jme->rx_cleaning);
+}
+
+static void
+jme_rx_empty_tasklet(unsigned long arg)
+{
+       struct jme_adapter *jme = (struct jme_adapter*)arg;
+
+       if(atomic_read(&jme->link_changing) != 1)
+               return;
+
+       if(unlikely(netif_queue_stopped(jme->dev)))
+               return;
+
+       jme_rx_clean_tasklet(arg);
+       jme_restart_rx_engine(jme);
+}
+
+static void
+jme_tx_clean_tasklet(unsigned long arg)
+{
+       struct jme_adapter *jme = (struct jme_adapter*)arg;
+       struct jme_ring *txring = &(jme->txring[0]);
+       volatile struct txdesc *txdesc = txring->desc;
+       struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
+       int i, j, cnt = 0, max;
+
+       if(!atomic_dec_and_test(&jme->tx_cleaning))
+               goto out;
+
+       if(atomic_read(&jme->link_changing) != 1)
+               goto out;
+
+       if(unlikely(netif_queue_stopped(jme->dev)))
+               goto out;
+
+       spin_lock(&jme->tx_lock);
+       max = RING_DESC_NR - txring->nr_free;
+       spin_unlock(&jme->tx_lock);
+
+       tx_dbg(jme->dev->name, "Tx Tasklet: In\n");
+
+       for(i = txring->next_to_clean ; cnt < max ; ) {
+
+               ctxbi = txbi + i;
+
+               if(ctxbi->skb && !(txdesc[i].desc1.flags & TXFLAG_OWN)) {
+
+                       tx_dbg(jme->dev->name,
+                               "Tx Tasklet: Clean %d+%d\n",
+                               i, ctxbi->nr_desc);
+
+                       for(j = 1 ; j < ctxbi->nr_desc ; ++j) {
+                               ttxbi = txbi + ((i + j) & (RING_DESC_NR - 1));
+                               txdesc[(i+j)&(RING_DESC_NR-1)].dw[0] = 0;
+
+                               pci_unmap_single(jme->pdev,
+                                                ttxbi->mapping,
+                                                ttxbi->len,
+                                                PCI_DMA_TODEVICE);
+
+                               NET_STAT(jme).tx_bytes += ttxbi->len;
+                               ttxbi->mapping = 0;
+                               ttxbi->len = 0;
+                       }
+
+                       dev_kfree_skb(ctxbi->skb);
+                       ctxbi->skb = NULL;
+
+                       cnt += ctxbi->nr_desc;
+
+                       ++(NET_STAT(jme).tx_packets);
+               }
+               else {
+                       if(!ctxbi->skb)
+                               tx_dbg(jme->dev->name,
+                                       "Tx Tasklet:"
+                                       " Stoped due to no skb.\n");
+                       else
+                               tx_dbg(jme->dev->name,
+                                       "Tx Tasklet:"
+                                       "Stoped due to not done.\n");
+                       break;
+               }
+
+               if(unlikely((i += ctxbi->nr_desc) >= RING_DESC_NR))
+                       i -= RING_DESC_NR;
+
+               ctxbi->nr_desc = 0;
        }
 
        }
 
+       tx_dbg(jme->dev->name,
+               "Tx Tasklet: Stop %d Jiffies %lu\n",
+               i, jiffies);
+       txring->next_to_clean = i;
+
+       spin_lock(&jme->tx_lock);
+       txring->nr_free += cnt;
+       spin_unlock(&jme->tx_lock);
+
+out:
+       atomic_inc(&jme->tx_cleaning);
 }
 
 }
 
-static irqreturn_t jme_intr(int irq, void *dev_id)
+static irqreturn_t
+jme_intr(int irq, void *dev_id)
 {
         struct net_device *netdev = dev_id;
         struct jme_adapter *jme = netdev_priv(netdev);
 {
         struct net_device *netdev = dev_id;
         struct jme_adapter *jme = netdev_priv(netdev);
@@ -936,82 +1191,102 @@ static irqreturn_t jme_intr(int irq, void *dev_id)
        intrstat = jread32(jme, JME_IEVE);
 #endif
 
        intrstat = jread32(jme, JME_IEVE);
 #endif
 
-
-#ifdef INTERRUPT_DEBUG
-       dprintk(netdev->name, "Interrupt received(%08x) @ %lu.\n", intrstat, jiffies);
-#endif
-
        /*
         * Check if it's really an interrupt for us
        /*
         * Check if it's really an interrupt for us
-        * and if the device still exist
         */
         */
-        if((intrstat & INTR_ENABLE) == 0) {
+        if(intrstat == 0) {
                rc = IRQ_NONE;
                goto out;
        }
                rc = IRQ_NONE;
                goto out;
        }
+
+       /*
+        * Check if the device still exist
+        */
        if(unlikely(intrstat == ~((typeof(intrstat))0))) {
                 rc = IRQ_NONE;
                goto out;
        }
 
        if(unlikely(intrstat == ~((typeof(intrstat))0))) {
                 rc = IRQ_NONE;
                goto out;
        }
 
+       /*
+        * Allow one interrupt handling at a time
+        */
+        if(unlikely(!atomic_dec_and_test(&jme->intr_sem)))
+               goto out_inc;
+
+       /*
+        * Disable interrupt
+        */
+       jwrite32f(jme, JME_IENC, INTR_ENABLE);
 
        if(intrstat & INTR_LINKCH) {
 
        if(intrstat & INTR_LINKCH) {
-               /*
-                * Process Link status change event
-                */
                tasklet_schedule(&jme->linkch_task);
                tasklet_schedule(&jme->linkch_task);
+               goto out_deassert;
        }
 
        }
 
-       if(intrstat & INTR_RX0EMP) {
-               /*
-                * Process event
-                */
-               jme->flags |= JME_FLAG_RXQ0_EMPTY;
-
-                jeprintk(netdev->name, "Ranout of Receive Queue 0.\n");
-       }
+       if(intrstat & INTR_RX0EMP)
+               tasklet_schedule(&jme->rxempty_task);
 
 
-       if(intrstat & INTR_RX0) {
-               /*
-                * Process event
-                */
+       if(intrstat & (INTR_PCCRX0TO | INTR_PCCRX0))
                tasklet_schedule(&jme->rxclean_task);
 
                tasklet_schedule(&jme->rxclean_task);
 
-#ifdef RX_PKT_DEBUG
-                dprintk(netdev->name, "Received From Queue 0.\n");
-#endif
-       }
-
-       if(intrstat & INTR_TX0) {
-               /*
-                * Process event
-                */
+       if(intrstat & (INTR_PCCTXTO | INTR_PCCTX))
                tasklet_schedule(&jme->txclean_task);
 
                tasklet_schedule(&jme->txclean_task);
 
-#ifdef TX_PKT_DEBUG
-                dprintk(netdev->name, "Queue 0 transmit complete.\n");
-#endif
-       }
-
         if((intrstat & ~INTR_ENABLE) != 0) {
         if((intrstat & ~INTR_ENABLE) != 0) {
-#ifdef INTERRUPT_DEBUG
-               dprintk(netdev->name, "Some interrupt event not handled: %08x\n", intrstat & ~INTR_ENABLE);
-#endif
+               /*
+                * Some interrupt not handled
+                * but not enabled also (for debug)
+                */
        }
 
        }
 
+out_deassert:
        /*
         * Deassert interrupts
         */
        /*
         * Deassert interrupts
         */
-       jwrite32(jme, JME_IEVE, intrstat & INTR_ENABLE);
+       jwrite32f(jme, JME_IEVE, intrstat);
+
+       /*
+        * Re-enable interrupt
+        */
+       jwrite32f(jme, JME_IENS, INTR_ENABLE);
+
+out_inc:
+       /*
+        * Enable next interrupt handling
+        */
+       atomic_inc(&jme->intr_sem);
 
 out:
         return rc;
 }
 
 
 out:
         return rc;
 }
 
-static int jme_open(struct net_device *netdev)
+static void
+jme_restart_an(struct jme_adapter *jme)
+{
+       __u32 bmcr;
+
+       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);
+}
+
+static int
+jme_open(struct net_device *netdev)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
 {
        struct jme_adapter *jme = netdev_priv(netdev);
-       int rc;
+       int rc, timeout = 100;
+
+       while(
+               --timeout > 0 &&
+               (
+               atomic_read(&jme->link_changing) != 1 ||
+               atomic_read(&jme->rx_cleaning) != 1 ||
+               atomic_read(&jme->tx_cleaning) != 1
+               )
+       )
+               msleep(10);
+
+       jme_reset_mac_processor(jme);
 
        rc = request_irq(jme->pdev->irq, jme_intr,
                         IRQF_SHARED, netdev->name, netdev);
 
        rc = request_irq(jme->pdev->irq, jme_intr,
                         IRQF_SHARED, netdev->name, netdev);
@@ -1019,41 +1294,20 @@ static int jme_open(struct net_device *netdev)
                printk(KERN_ERR PFX "Requesting IRQ error.\n");
                goto err_out;
        }
                printk(KERN_ERR PFX "Requesting IRQ error.\n");
                goto err_out;
        }
-
-       rc = jme_setup_rx_resources(jme);
-       if(rc) {
-               printk(KERN_ERR PFX "Allocating resources for RX error.\n");
-               goto err_out_free_irq;
-       }
-
-
-       rc = jme_setup_tx_resources(jme);
-       if(rc) {
-               printk(KERN_ERR PFX "Allocating resources for TX error.\n");
-               goto err_out_free_rx_resources;
-       }
-
-       jme_reset_mac_processor(jme);
-       jme_check_link(netdev);
        jme_enable_shadow(jme);
        jme_start_irq(jme);
        jme_enable_shadow(jme);
        jme_start_irq(jme);
-       jme_enable_rx_engine(jme);
-       jme_enable_tx_engine(jme);
-       netif_start_queue(netdev);
+       jme_restart_an(jme);
 
        return 0;
 
 
        return 0;
 
-err_out_free_rx_resources:
-       jme_free_rx_resources(jme);
-err_out_free_irq:
-       free_irq(jme->pdev->irq, jme->dev);
 err_out:
        netif_stop_queue(netdev);
        netif_carrier_off(netdev);
        return rc;
 }
 
 err_out:
        netif_stop_queue(netdev);
        netif_carrier_off(netdev);
        return rc;
 }
 
-static int jme_close(struct net_device *netdev)
+static int
+jme_close(struct net_device *netdev)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
 
 {
        struct jme_adapter *jme = netdev_priv(netdev);
 
@@ -1067,6 +1321,7 @@ static int jme_close(struct net_device *netdev)
        tasklet_kill(&jme->linkch_task);
        tasklet_kill(&jme->txclean_task);
        tasklet_kill(&jme->rxclean_task);
        tasklet_kill(&jme->linkch_task);
        tasklet_kill(&jme->txclean_task);
        tasklet_kill(&jme->rxclean_task);
+       tasklet_kill(&jme->rxempty_task);
        jme_disable_rx_engine(jme);
        jme_disable_tx_engine(jme);
        jme_free_rx_resources(jme);
        jme_disable_rx_engine(jme);
        jme_disable_tx_engine(jme);
        jme_free_rx_resources(jme);
@@ -1075,55 +1330,34 @@ static int jme_close(struct net_device *netdev)
        return 0;
 }
 
        return 0;
 }
 
-static int jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
+/*
+ * 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);
 {
         struct jme_adapter *jme = netdev_priv(netdev);
-       struct jme_ring *txring = &(jme->txring[0]);
-       struct TxDesc *txdesc = txring->desc;
-       int idx;
+       int rc;
 
 
-       /*
-        * Check if transmit queue is already full
-        * and take one descriptor to use
-        */
-       spin_lock(&jme->xmit_lock);
-       idx = txring->next_to_use;
-       if(unlikely(txdesc[idx].desc1.flags & TXFLAG_OWN)) {
-               spin_unlock(&jme->xmit_lock);
-#ifdef TX_BUSY_DEBUG
-               dprintk(netdev->name, "TX Device busy.\n");
-#endif
+       if(unlikely(netif_queue_stopped(jme->dev)))
                return NETDEV_TX_BUSY;
                return NETDEV_TX_BUSY;
-       }
-       if(unlikely(++(txring->next_to_use) == RING_DESC_NR))
-               txring->next_to_use = 0;
-       spin_unlock(&jme->xmit_lock);
 
 
-       /*
-        * Fill up TX descriptors
-        */
-       jme_set_new_txdesc(jme, idx, skb);
+       rc = jme_set_new_txdesc(jme, skb);
+
+       if(unlikely(rc != NETDEV_TX_OK))
+               return rc;
 
 
-       /*
-        * Tell MAC HW to send
-        */
        jwrite32(jme, JME_TXCS, jme->reg_txcs |
                                TXCS_SELECT_QUEUE0 |
                                TXCS_QUEUE0S |
                                TXCS_ENABLE);
        jwrite32(jme, JME_TXCS, jme->reg_txcs |
                                TXCS_SELECT_QUEUE0 |
                                TXCS_QUEUE0S |
                                TXCS_ENABLE);
-
-#ifdef TX_PKT_DEBUG
-       dprintk(netdev->name, "Asked to transmit.\n");
-#endif
-
-       NET_STAT.tx_bytes += skb->len;
-       ++(NET_STAT.tx_packets);
        netdev->trans_start = jiffies;
 
         return NETDEV_TX_OK;
 }
 
        netdev->trans_start = jiffies;
 
         return NETDEV_TX_OK;
 }
 
-static int jme_set_macaddr(struct net_device *netdev, void *p)
+static int
+jme_set_macaddr(struct net_device *netdev, void *p)
 {
         struct jme_adapter *jme = netdev_priv(netdev);
        struct sockaddr *addr = p;
 {
         struct jme_adapter *jme = netdev_priv(netdev);
        struct sockaddr *addr = p;
@@ -1148,42 +1382,33 @@ static int jme_set_macaddr(struct net_device *netdev, void *p)
        return 0;
 }
 
        return 0;
 }
 
-static void jme_set_multi(struct net_device *netdev)
+static void
+jme_set_multi(struct net_device *netdev)
 {
 {
-        struct jme_adapter *jme = netdev_priv(netdev);
+       struct jme_adapter *jme = netdev_priv(netdev);
        u32 mc_hash[2] = {};
        __u32 val;
        int i;
 
        u32 mc_hash[2] = {};
        __u32 val;
        int i;
 
+       val = jme->reg_rxmcs | RXMCS_BRDFRAME | RXMCS_UNIFRAME;
 
 
-       spin_lock(&jme->macaddr_lock);
-       val = RXMCS_BRDFRAME | RXMCS_UNIFRAME;
-
-        if (netdev->flags & IFF_PROMISC)
+        if (netdev->flags & IFF_PROMISC) {
                val |= RXMCS_ALLFRAME;
                val |= RXMCS_ALLFRAME;
-        else if (netdev->flags & IFF_ALLMULTI)
+       }
+        else if (netdev->flags & IFF_ALLMULTI) {
                val |= RXMCS_ALLMULFRAME;
                val |= RXMCS_ALLMULFRAME;
+       }
        else if(netdev->flags & IFF_MULTICAST) {
        else if(netdev->flags & IFF_MULTICAST) {
-                struct dev_mc_list *mclist;
-                int bit_nr;
+               struct dev_mc_list *mclist;
+               int bit_nr;
 
                val |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
 
                val |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
-                for (i = 0, mclist = netdev->mc_list;
-                     mclist && i < netdev->mc_count;
-                     ++i, mclist = mclist->next) {
+               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);
                         bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x3F;
                         mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
-#ifdef SET_MULTI_DEBUG
-                       dprintk(netdev->name, "Adding MCAddr: "
-                               "%02x:%02x:%02x:%02x:%02x:%02x (%d)\n",
-                               mclist->dmi_addr[0],
-                               mclist->dmi_addr[1],
-                               mclist->dmi_addr[2],
-                               mclist->dmi_addr[3],
-                               mclist->dmi_addr[4],
-                               mclist->dmi_addr[5],
-                               bit_nr);
-#endif
                 }
 
                jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
                 }
 
                jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
@@ -1193,23 +1418,20 @@ static void jme_set_multi(struct net_device *netdev)
 
        wmb();
        jwrite32(jme, JME_RXMCS, val);
 
        wmb();
        jwrite32(jme, JME_RXMCS, val);
-       spin_unlock(&jme->macaddr_lock);
-
-#ifdef SET_MULTI_DEBUG
-       dprintk(netdev->name, "RX Mode changed: %08x\n", val);
-#endif
 }
 
 }
 
-static int jme_change_mtu(struct net_device *dev, int new_mtu)
+static int
+jme_change_mtu(struct net_device *dev, int new_mtu)
 {
        /*
 {
        /*
-        * Do not support MTU change for now.
+        * Not supporting MTU change for now.
         */
        return -EINVAL;
 }
 
         */
        return -EINVAL;
 }
 
-static void jme_get_drvinfo(struct net_device *netdev,
-                             struct ethtool_drvinfo *info)
+static void
+jme_get_drvinfo(struct net_device *netdev,
+                    struct ethtool_drvinfo *info)
 {
         struct jme_adapter *jme = netdev_priv(netdev);
 
 {
         struct jme_adapter *jme = netdev_priv(netdev);
 
@@ -1218,8 +1440,9 @@ static void jme_get_drvinfo(struct net_device *netdev,
         strcpy(info->bus_info, pci_name(jme->pdev));
 }
 
         strcpy(info->bus_info, pci_name(jme->pdev));
 }
 
-static int jme_get_settings(struct net_device *netdev,
-                            struct ethtool_cmd *ecmd)
+static int
+jme_get_settings(struct net_device *netdev,
+                    struct ethtool_cmd *ecmd)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        int rc;
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        int rc;
@@ -1229,18 +1452,24 @@ static int jme_get_settings(struct net_device *netdev,
        return rc;
 }
 
        return rc;
 }
 
-static int jme_set_settings(struct net_device *netdev,
-                            struct ethtool_cmd *ecmd)
+static int
+jme_set_settings(struct net_device *netdev,
+                    struct ethtool_cmd *ecmd)
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        int rc;
 {
        struct jme_adapter *jme = netdev_priv(netdev);
        int rc;
-       spin_lock(&jme->phy_lock);
+       unsigned long flags;
+
+       spin_lock_irqsave(&jme->phy_lock, flags);
        rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
        rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
-       spin_unlock(&jme->phy_lock);
+       spin_unlock_irqrestore(&jme->phy_lock, flags);
+
        return rc;
 }
 
        return rc;
 }
 
-static u32 jme_get_link(struct net_device *netdev) {
+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;
 }
        struct jme_adapter *jme = netdev_priv(netdev);
        return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
 }
@@ -1252,10 +1481,25 @@ static const struct ethtool_ops jme_ethtool_ops = {
        .get_link               = jme_get_link,
 };
 
        .get_link               = jme_get_link,
 };
 
-static int __devinit jme_init_one(struct pci_dev *pdev,
-                                     const struct pci_device_id *ent)
+static int
+jme_pci_dma64(struct pci_dev *pdev)
 {
 {
-       int rc = 0;
+        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_32BIT_MASK))
+                if(!pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))
+                       return 0;
+
+       return -1;
+}
+
+static int __devinit
+jme_init_one(struct pci_dev *pdev,
+            const struct pci_device_id *ent)
+{
+       int rc = 0, using_dac;
        struct net_device *netdev;
        struct jme_adapter *jme;
 
        struct net_device *netdev;
        struct jme_adapter *jme;
 
@@ -1268,6 +1512,13 @@ static int __devinit jme_init_one(struct pci_dev *pdev,
                goto err_out;
        }
 
                goto err_out;
        }
 
+       using_dac = jme_pci_dma64(pdev);
+       if(using_dac < 0) {
+               printk(KERN_ERR PFX "Cannot set PCI DMA Mask.\n");
+               rc = -EIO;
+               goto err_out_disable_pdev;
+       }
+
        if(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
                printk(KERN_ERR PFX "No PCI resource region found.\n");
                rc = -ENOMEM;
        if(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
                printk(KERN_ERR PFX "No PCI resource region found.\n");
                rc = -ENOMEM;
@@ -1285,7 +1536,7 @@ static int __devinit jme_init_one(struct pci_dev *pdev,
        /*
         * alloc and init net device
         */
        /*
         * alloc and init net device
         */
-       netdev = alloc_etherdev(sizeof(struct jme_adapter));
+       netdev = alloc_etherdev(sizeof(*jme));
        if(!netdev) {
                rc = -ENOMEM;
                goto err_out_release_regions;
        if(!netdev) {
                rc = -ENOMEM;
                goto err_out_release_regions;
@@ -1298,6 +1549,10 @@ static int __devinit jme_init_one(struct pci_dev *pdev,
        netdev->set_multicast_list      = jme_set_multi;
        netdev->change_mtu              = jme_change_mtu;
        netdev->ethtool_ops             = &jme_ethtool_ops;
        netdev->set_multicast_list      = jme_set_multi;
        netdev->change_mtu              = jme_change_mtu;
        netdev->ethtool_ops             = &jme_ethtool_ops;
+       NETDEV_GET_STATS(netdev, &jme_get_stats);
+
+       if(using_dac)
+               netdev->features        = NETIF_F_HIGHDMA;
 
        SET_NETDEV_DEV(netdev, &pdev->dev);
        pci_set_drvdata(pdev, netdev);
 
        SET_NETDEV_DEV(netdev, &pdev->dev);
        pci_set_drvdata(pdev, netdev);
@@ -1308,6 +1563,8 @@ static int __devinit jme_init_one(struct pci_dev *pdev,
        jme = netdev_priv(netdev);
        jme->pdev = pdev;
        jme->dev = netdev;
        jme = netdev_priv(netdev);
        jme->pdev = pdev;
        jme->dev = netdev;
+       jme->reg_ghc = GHC_DPX | GHC_SPEED_1000M;
+       jme->phylink = 0;
        jme->regs = ioremap(pci_resource_start(pdev, 0),
                             pci_resource_len(pdev, 0));
        if (!(jme->regs)) {
        jme->regs = ioremap(pci_resource_start(pdev, 0),
                             pci_resource_len(pdev, 0));
        if (!(jme->regs)) {
@@ -1322,10 +1579,15 @@ static int __devinit jme_init_one(struct pci_dev *pdev,
                goto err_out_unmap;
        }
 
                goto err_out_unmap;
        }
 
-       spin_lock_init(&jme->xmit_lock);
-       spin_lock_init(&jme->recv_lock);
-       spin_lock_init(&jme->macaddr_lock);
+       spin_lock_init(&jme->tx_lock);
        spin_lock_init(&jme->phy_lock);
        spin_lock_init(&jme->phy_lock);
+       spin_lock_init(&jme->macaddr_lock);
+
+       atomic_set(&jme->intr_sem, 1);
+       atomic_set(&jme->link_changing, 1);
+       atomic_set(&jme->rx_cleaning, 1);
+       atomic_set(&jme->tx_cleaning, 1);
+
        tasklet_init(&jme->linkch_task,
                     &jme_link_change_tasklet,
                     (unsigned long) jme);
        tasklet_init(&jme->linkch_task,
                     &jme_link_change_tasklet,
                     (unsigned long) jme);
@@ -1335,23 +1597,42 @@ static int __devinit jme_init_one(struct pci_dev *pdev,
        tasklet_init(&jme->rxclean_task,
                     &jme_rx_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);
        jme->mii_if.dev = netdev;
        jme->mii_if.phy_id = 1;
        jme->mii_if.supports_gmii = 1;
        jme->mii_if.mdio_read = jme_mdio_read;
        jme->mii_if.mdio_write = jme_mdio_write;
        jme->mii_if.dev = netdev;
        jme->mii_if.phy_id = 1;
        jme->mii_if.supports_gmii = 1;
        jme->mii_if.mdio_read = jme_mdio_read;
        jme->mii_if.mdio_write = jme_mdio_write;
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,21)
-       netdev->get_stats = &(jme_get_stats);
-#endif
+
+       /*
+        * Get Max Read Req Size from PCI Config Space
+        */
+       pci_read_config_byte(pdev, PCI_CONF_DCSR_MRRS, &jme->mrrs);
+       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;
+       };
+
 
        /*
         * Reset MAC processor and reload EEPROM for MAC Address
         */
        jme_clear_pm(jme);
 
        /*
         * Reset MAC processor and reload EEPROM for MAC Address
         */
        jme_clear_pm(jme);
+       jme_reset_phy_processor(jme);
        jme_reset_mac_processor(jme);
        rc = jme_reload_eeprom(jme);
        if(rc) {
        jme_reset_mac_processor(jme);
        rc = jme_reload_eeprom(jme);
        if(rc) {
-               printk(KERN_ERR PFX "Rload eeprom for reading MAC Address error.\n");
+               printk(KERN_ERR PFX
+                       "Rload eeprom for reading MAC Address error.\n");
                goto err_out_free_shadow;
        }
        jme_load_macaddr(netdev);
                goto err_out_free_shadow;
        }
        jme_load_macaddr(netdev);
@@ -1373,7 +1654,8 @@ static int __devinit jme_init_one(struct pci_dev *pdev,
        }
 
        jprintk(netdev->name,
        }
 
        jprintk(netdev->name,
-               "JMC250 gigabit eth at %llx, %02x:%02x:%02x:%02x:%02x:%02x, IRQ %d\n",
+               "JMC250 gigabit eth at %llx, "
+               "%02x:%02x:%02x:%02x:%02x:%02x, IRQ %d\n",
                (unsigned long long) pci_resource_start(pdev, 0),
                netdev->dev_addr[0],
                netdev->dev_addr[1],
                (unsigned long long) pci_resource_start(pdev, 0),
                netdev->dev_addr[0],
                netdev->dev_addr[1],
@@ -1403,8 +1685,9 @@ err_out:
        return rc;
 }
 
        return rc;
 }
 
-static void __devexit jme_remove_one(struct pci_dev *pdev)
-{ 
+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);
 
        struct net_device *netdev = pci_get_drvdata(pdev);
        struct jme_adapter *jme = netdev_priv(netdev);
 
@@ -1439,14 +1722,16 @@ static struct pci_driver jme_driver = {
 #endif
 };
 
 #endif
 };
 
-static int __init jme_init_module(void)
+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);
 }
 
 {
        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)
+static void __exit
+jme_cleanup_module(void)
 {
        pci_unregister_driver(&jme_driver);
 }
 {
        pci_unregister_driver(&jme_driver);
 }
@@ -1454,7 +1739,7 @@ static void __exit jme_cleanup_module(void)
 module_init(jme_init_module);
 module_exit(jme_cleanup_module);
 
 module_init(jme_init_module);
 module_exit(jme_cleanup_module);
 
-MODULE_AUTHOR("David Tseng <cooldavid@cooldavid.org>");
+MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
 MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_VERSION);
 MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_VERSION);
JMicron Ethernet Linux driver