+ 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, le16_to_cpu(rxdesc->descwb.flags)))
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ else
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,35)
+ skb->ip_summed = CHECKSUM_NONE;
+#else
+ skb_checksum_none_assert(skb);
+#endif
+
+ if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
+ if (jme->vlgrp) {
+ jme->jme_vlan_rx(skb, jme->vlgrp,
+ le16_to_cpu(rxdesc->descwb.vlan));
+ NET_STAT(jme).rx_bytes += 4;
+ } else {
+ dev_kfree_skb(skb);
+ }
+ } else {
+ jme->jme_rx(skb);
+ }
+
+ if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
+ cpu_to_le16(RXWBFLAG_DEST_MUL))
+ ++(NET_STAT(jme).multicast);
+
+ 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 & cpu_to_le16(RXWBFLAG_OWN)) ||
+ !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
+ goto out;
+ --limit;
+
+ rmb();
+ 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);
+ netif_info(jme, intr, jme->dev, "Get link change lock failed\n");
+ while (atomic_read(&jme->link_changing) != 1)
+ netif_info(jme, intr, jme->dev, "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) {
+ pr_err("Allocating resources for RX error, Device STOPPED!\n");
+ goto out_enable_tasklet;
+ }
+
+ rc = jme_setup_tx_resources(jme);
+ if (rc) {
+ pr_err("Allocating resources for TX error, Device STOPPED!\n");
+ goto err_out_free_rx_resources;
+ }
+
+ jme_enable_rx_engine(jme);
+ jme_enable_tx_engine(jme);
+
+ netif_start_queue(netdev);
+
+ if (test_bit(JME_FLAG_POLL, &jme->flags))
+ jme_interrupt_mode(jme);
+
+ jme_start_pcc_timer(jme);
+ } else if (jme_pseudo_hotplug_enabled(jme)) {
+ jme_start_shutdown_timer(jme);
+ }
+
+ goto out_enable_tasklet;
+
+err_out_free_rx_resources:
+ jme_free_rx_resources(jme);
+out_enable_tasklet:
+ tasklet_enable(&jme->txclean_task);
+ tasklet_hi_enable(&jme->rxclean_task);
+ tasklet_hi_enable(&jme->rxempty_task);
+out:
+ atomic_inc(&jme->link_changing);
+}
+
+static void
+jme_rx_clean_tasklet(unsigned long arg)
+{
+ struct jme_adapter *jme = (struct jme_adapter *)arg;
+ struct dynpcc_info *dpi = &(jme->dpi);
+
+ jme_process_receive(jme, jme->rx_ring_size);
+ ++(dpi->intr_cnt);
+
+}
+
+static int
+jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
+{
+ struct jme_adapter *jme = jme_napi_priv(holder);
+ DECLARE_NETDEV
+ int rest;
+
+ rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
+
+ while (atomic_read(&jme->rx_empty) > 0) {
+ atomic_dec(&jme->rx_empty);
+ ++(NET_STAT(jme).rx_dropped);
+ jme_restart_rx_engine(jme);
+ }
+ atomic_inc(&jme->rx_empty);
+
+ if (rest) {
+ JME_RX_COMPLETE(netdev, holder);
+ jme_interrupt_mode(jme);
+ }
+
+ JME_NAPI_WEIGHT_SET(budget, rest);
+ return JME_NAPI_WEIGHT_VAL(budget) - rest;
+}
+
+static void
+jme_rx_empty_tasklet(unsigned long arg)
+{
+ struct jme_adapter *jme = (struct jme_adapter *)arg;
+
+ if (unlikely(atomic_read(&jme->link_changing) != 1))
+ return;
+
+ if (unlikely(!netif_carrier_ok(jme->dev)))
+ return;
+
+ netif_info(jme, rx_status, jme->dev, "RX Queue Full!\n");
+
+ jme_rx_clean_tasklet(arg);
+
+ while (atomic_read(&jme->rx_empty) > 0) {
+ atomic_dec(&jme->rx_empty);
+ ++(NET_STAT(jme).rx_dropped);
+ jme_restart_rx_engine(jme);
+ }
+ atomic_inc(&jme->rx_empty);
+}
+
+static void
+jme_wake_queue_if_stopped(struct jme_adapter *jme)
+{
+ struct jme_ring *txring = &(jme->txring[0]);
+
+ smp_wmb();
+ if (unlikely(netif_queue_stopped(jme->dev) &&
+ atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
+ netif_info(jme, tx_done, jme->dev, "TX Queue Waked\n");
+ netif_wake_queue(jme->dev);
+ }
+
+}
+
+static void
+jme_tx_clean_tasklet(unsigned long arg)
+{
+ struct jme_adapter *jme = (struct jme_adapter *)arg;
+ struct jme_ring *txring = &(jme->txring[0]);
+ struct txdesc *txdesc = txring->desc;
+ struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
+ int i, j, cnt = 0, max, err, mask;
+
+ tx_dbg(jme, "Into txclean\n");
+
+ if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
+ goto out;
+
+ if (unlikely(atomic_read(&jme->link_changing) != 1))
+ goto out;
+
+ if (unlikely(!netif_carrier_ok(jme->dev)))
+ goto out;
+
+ max = jme->tx_ring_size - atomic_read(&txring->nr_free);
+ mask = jme->tx_ring_mask;
+
+ for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
+
+ ctxbi = txbi + i;
+
+ if (likely(ctxbi->skb &&
+ !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
+
+ tx_dbg(jme, "txclean: %d+%d@%lu\n",
+ i, ctxbi->nr_desc, jiffies);
+
+ err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
+
+ for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
+ ttxbi = txbi + ((i + j) & (mask));
+ txdesc[(i + j) & (mask)].dw[0] = 0;
+
+ pci_unmap_page(jme->pdev,
+ ttxbi->mapping,
+ ttxbi->len,
+ PCI_DMA_TODEVICE);
+
+ ttxbi->mapping = 0;
+ ttxbi->len = 0;
+ }
+
+ dev_kfree_skb(ctxbi->skb);
+
+ cnt += ctxbi->nr_desc;
+
+ if (unlikely(err)) {
+ ++(NET_STAT(jme).tx_carrier_errors);
+ } else {
+ ++(NET_STAT(jme).tx_packets);
+ NET_STAT(jme).tx_bytes += ctxbi->len;
+ }
+
+ ctxbi->skb = NULL;
+ ctxbi->len = 0;
+ ctxbi->start_xmit = 0;
+
+ } else {
+ break;
+ }
+
+ i = (i + ctxbi->nr_desc) & mask;
+
+ ctxbi->nr_desc = 0;
+ }
+
+ tx_dbg(jme, "txclean: done %d@%lu\n", i, jiffies);
+ atomic_set(&txring->next_to_clean, i);
+ atomic_add(cnt, &txring->nr_free);
+
+ jme_wake_queue_if_stopped(jme);
+
+out:
+ atomic_inc(&jme->tx_cleaning);
+}
+
+static void
+jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
+{
+ /*
+ * Disable interrupt
+ */
+ jwrite32f(jme, JME_IENC, INTR_ENABLE);
+
+ if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
+ /*
+ * Link change event is critical
+ * all other events are ignored
+ */
+ jwrite32(jme, JME_IEVE, intrstat);
+ tasklet_schedule(&jme->linkch_task);
+ goto out_reenable;
+ }
+
+ if (intrstat & INTR_TMINTR) {
+ jwrite32(jme, JME_IEVE, INTR_TMINTR);
+ tasklet_schedule(&jme->pcc_task);
+ }
+
+ if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
+ jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
+ tasklet_schedule(&jme->txclean_task);
+ }
+
+ if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
+ jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
+ INTR_PCCRX0 |
+ INTR_RX0EMP)) |
+ INTR_RX0);
+ }
+
+ if (test_bit(JME_FLAG_POLL, &jme->flags)) {
+ if (intrstat & INTR_RX0EMP)
+ atomic_inc(&jme->rx_empty);
+
+ if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
+ if (likely(JME_RX_SCHEDULE_PREP(jme))) {
+ jme_polling_mode(jme);
+ JME_RX_SCHEDULE(jme);
+ }
+ }
+ } else {
+ if (intrstat & INTR_RX0EMP) {
+ atomic_inc(&jme->rx_empty);
+ tasklet_hi_schedule(&jme->rxempty_task);
+ } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
+ tasklet_hi_schedule(&jme->rxclean_task);
+ }
+ }
+
+out_reenable:
+ /*
+ * Re-enable interrupt
+ */
+ jwrite32f(jme, JME_IENS, INTR_ENABLE);
+}
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
+static irqreturn_t
+jme_intr(int irq, void *dev_id, struct pt_regs *regs)
+#else
+static irqreturn_t
+jme_intr(int irq, void *dev_id)
+#endif
+{
+ struct net_device *netdev = dev_id;
+ struct jme_adapter *jme = netdev_priv(netdev);
+ u32 intrstat;
+
+ intrstat = jread32(jme, JME_IEVE);
+
+ /*
+ * Check if it's really an interrupt for us
+ */
+ if (unlikely((intrstat & INTR_ENABLE) == 0))
+ return IRQ_NONE;
+
+ /*
+ * Check if the device still exist