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path: root/drivers/net/pch_gbe/pch_gbe_main.c
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Diffstat (limited to 'drivers/net/pch_gbe/pch_gbe_main.c')
-rw-r--r--drivers/net/pch_gbe/pch_gbe_main.c2477
1 files changed, 2477 insertions, 0 deletions
diff --git a/drivers/net/pch_gbe/pch_gbe_main.c b/drivers/net/pch_gbe/pch_gbe_main.c
new file mode 100644
index 00000000000..472056b4744
--- /dev/null
+++ b/drivers/net/pch_gbe/pch_gbe_main.c
@@ -0,0 +1,2477 @@
+/*
+ * Copyright (C) 1999 - 2010 Intel Corporation.
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This code was derived from the Intel e1000e Linux driver.
+ *
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "pch_gbe.h"
+#include "pch_gbe_api.h"
+
+#define DRV_VERSION "1.00"
+const char pch_driver_version[] = DRV_VERSION;
+
+#define PCI_DEVICE_ID_INTEL_IOH1_GBE 0x8802 /* Pci device ID */
+#define PCH_GBE_MAR_ENTRIES 16
+#define PCH_GBE_SHORT_PKT 64
+#define DSC_INIT16 0xC000
+#define PCH_GBE_DMA_ALIGN 0
+#define PCH_GBE_WATCHDOG_PERIOD (1 * HZ) /* watchdog time */
+#define PCH_GBE_COPYBREAK_DEFAULT 256
+#define PCH_GBE_PCI_BAR 1
+
+#define PCH_GBE_TX_WEIGHT 64
+#define PCH_GBE_RX_WEIGHT 64
+#define PCH_GBE_RX_BUFFER_WRITE 16
+
+/* Initialize the wake-on-LAN settings */
+#define PCH_GBE_WL_INIT_SETTING (PCH_GBE_WLC_MP)
+
+#define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
+ PCH_GBE_CHIP_TYPE_INTERNAL | \
+ PCH_GBE_RGMII_MODE_RGMII | \
+ PCH_GBE_CRS_SEL \
+ )
+
+/* Ethertype field values */
+#define PCH_GBE_MAX_JUMBO_FRAME_SIZE 10318
+#define PCH_GBE_FRAME_SIZE_2048 2048
+#define PCH_GBE_FRAME_SIZE_4096 4096
+#define PCH_GBE_FRAME_SIZE_8192 8192
+
+#define PCH_GBE_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
+#define PCH_GBE_RX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_rx_desc)
+#define PCH_GBE_TX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_tx_desc)
+#define PCH_GBE_DESC_UNUSED(R) \
+ ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
+ (R)->next_to_clean - (R)->next_to_use - 1)
+
+/* Pause packet value */
+#define PCH_GBE_PAUSE_PKT1_VALUE 0x00C28001
+#define PCH_GBE_PAUSE_PKT2_VALUE 0x00000100
+#define PCH_GBE_PAUSE_PKT4_VALUE 0x01000888
+#define PCH_GBE_PAUSE_PKT5_VALUE 0x0000FFFF
+
+#define PCH_GBE_ETH_ALEN 6
+
+/* This defines the bits that are set in the Interrupt Mask
+ * Set/Read Register. Each bit is documented below:
+ * o RXT0 = Receiver Timer Interrupt (ring 0)
+ * o TXDW = Transmit Descriptor Written Back
+ * o RXDMT0 = Receive Descriptor Minimum Threshold hit (ring 0)
+ * o RXSEQ = Receive Sequence Error
+ * o LSC = Link Status Change
+ */
+#define PCH_GBE_INT_ENABLE_MASK ( \
+ PCH_GBE_INT_RX_DMA_CMPLT | \
+ PCH_GBE_INT_RX_DSC_EMP | \
+ PCH_GBE_INT_WOL_DET | \
+ PCH_GBE_INT_TX_CMPLT \
+ )
+
+
+static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
+
+static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
+static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
+ int data);
+/**
+ * pch_gbe_mac_read_mac_addr - Read MAC address
+ * @hw: Pointer to the HW structure
+ * Returns
+ * 0: Successful.
+ */
+s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
+{
+ u32 adr1a, adr1b;
+
+ adr1a = ioread32(&hw->reg->mac_adr[0].high);
+ adr1b = ioread32(&hw->reg->mac_adr[0].low);
+
+ hw->mac.addr[0] = (u8)(adr1a & 0xFF);
+ hw->mac.addr[1] = (u8)((adr1a >> 8) & 0xFF);
+ hw->mac.addr[2] = (u8)((adr1a >> 16) & 0xFF);
+ hw->mac.addr[3] = (u8)((adr1a >> 24) & 0xFF);
+ hw->mac.addr[4] = (u8)(adr1b & 0xFF);
+ hw->mac.addr[5] = (u8)((adr1b >> 8) & 0xFF);
+
+ pr_debug("hw->mac.addr : %pM\n", hw->mac.addr);
+ return 0;
+}
+
+/**
+ * pch_gbe_wait_clr_bit - Wait to clear a bit
+ * @reg: Pointer of register
+ * @busy: Busy bit
+ */
+static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
+{
+ u32 tmp;
+ /* wait busy */
+ tmp = 1000;
+ while ((ioread32(reg) & bit) && --tmp)
+ cpu_relax();
+ if (!tmp)
+ pr_err("Error: busy bit is not cleared\n");
+}
+/**
+ * pch_gbe_mac_mar_set - Set MAC address register
+ * @hw: Pointer to the HW structure
+ * @addr: Pointer to the MAC address
+ * @index: MAC address array register
+ */
+static void pch_gbe_mac_mar_set(struct pch_gbe_hw *hw, u8 * addr, u32 index)
+{
+ u32 mar_low, mar_high, adrmask;
+
+ pr_debug("index : 0x%x\n", index);
+
+ /*
+ * HW expects these in little endian so we reverse the byte order
+ * from network order (big endian) to little endian
+ */
+ mar_high = ((u32) addr[0] | ((u32) addr[1] << 8) |
+ ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
+ mar_low = ((u32) addr[4] | ((u32) addr[5] << 8));
+ /* Stop the MAC Address of index. */
+ adrmask = ioread32(&hw->reg->ADDR_MASK);
+ iowrite32((adrmask | (0x0001 << index)), &hw->reg->ADDR_MASK);
+ /* wait busy */
+ pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
+ /* Set the MAC address to the MAC address 1A/1B register */
+ iowrite32(mar_high, &hw->reg->mac_adr[index].high);
+ iowrite32(mar_low, &hw->reg->mac_adr[index].low);
+ /* Start the MAC address of index */
+ iowrite32((adrmask & ~(0x0001 << index)), &hw->reg->ADDR_MASK);
+ /* wait busy */
+ pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
+}
+
+/**
+ * pch_gbe_mac_reset_hw - Reset hardware
+ * @hw: Pointer to the HW structure
+ */
+static void pch_gbe_mac_reset_hw(struct pch_gbe_hw *hw)
+{
+ /* Read the MAC address. and store to the private data */
+ pch_gbe_mac_read_mac_addr(hw);
+ iowrite32(PCH_GBE_ALL_RST, &hw->reg->RESET);
+#ifdef PCH_GBE_MAC_IFOP_RGMII
+ iowrite32(PCH_GBE_MODE_GMII_ETHER, &hw->reg->MODE);
+#endif
+ pch_gbe_wait_clr_bit(&hw->reg->RESET, PCH_GBE_ALL_RST);
+ /* Setup the receive address */
+ pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
+ return;
+}
+
+/**
+ * pch_gbe_mac_init_rx_addrs - Initialize receive address's
+ * @hw: Pointer to the HW structure
+ * @mar_count: Receive address registers
+ */
+static void pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw *hw, u16 mar_count)
+{
+ u32 i;
+
+ /* Setup the receive address */
+ pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
+
+ /* Zero out the other receive addresses */
+ for (i = 1; i < mar_count; i++) {
+ iowrite32(0, &hw->reg->mac_adr[i].high);
+ iowrite32(0, &hw->reg->mac_adr[i].low);
+ }
+ iowrite32(0xFFFE, &hw->reg->ADDR_MASK);
+ /* wait busy */
+ pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
+}
+
+
+/**
+ * pch_gbe_mac_mc_addr_list_update - Update Multicast addresses
+ * @hw: Pointer to the HW structure
+ * @mc_addr_list: Array of multicast addresses to program
+ * @mc_addr_count: Number of multicast addresses to program
+ * @mar_used_count: The first MAC Address register free to program
+ * @mar_total_num: Total number of supported MAC Address Registers
+ */
+static void pch_gbe_mac_mc_addr_list_update(struct pch_gbe_hw *hw,
+ u8 *mc_addr_list, u32 mc_addr_count,
+ u32 mar_used_count, u32 mar_total_num)
+{
+ u32 i, adrmask;
+
+ /* Load the first set of multicast addresses into the exact
+ * filters (RAR). If there are not enough to fill the RAR
+ * array, clear the filters.
+ */
+ for (i = mar_used_count; i < mar_total_num; i++) {
+ if (mc_addr_count) {
+ pch_gbe_mac_mar_set(hw, mc_addr_list, i);
+ mc_addr_count--;
+ mc_addr_list += PCH_GBE_ETH_ALEN;
+ } else {
+ /* Clear MAC address mask */
+ adrmask = ioread32(&hw->reg->ADDR_MASK);
+ iowrite32((adrmask | (0x0001 << i)),
+ &hw->reg->ADDR_MASK);
+ /* wait busy */
+ pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
+ /* Clear MAC address */
+ iowrite32(0, &hw->reg->mac_adr[i].high);
+ iowrite32(0, &hw->reg->mac_adr[i].low);
+ }
+ }
+}
+
+/**
+ * pch_gbe_mac_force_mac_fc - Force the MAC's flow control settings
+ * @hw: Pointer to the HW structure
+ * Returns
+ * 0: Successful.
+ * Negative value: Failed.
+ */
+s32 pch_gbe_mac_force_mac_fc(struct pch_gbe_hw *hw)
+{
+ struct pch_gbe_mac_info *mac = &hw->mac;
+ u32 rx_fctrl;
+
+ pr_debug("mac->fc = %u\n", mac->fc);
+
+ rx_fctrl = ioread32(&hw->reg->RX_FCTRL);
+
+ switch (mac->fc) {
+ case PCH_GBE_FC_NONE:
+ rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
+ mac->tx_fc_enable = false;
+ break;
+ case PCH_GBE_FC_RX_PAUSE:
+ rx_fctrl |= PCH_GBE_FL_CTRL_EN;
+ mac->tx_fc_enable = false;
+ break;
+ case PCH_GBE_FC_TX_PAUSE:
+ rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
+ mac->tx_fc_enable = true;
+ break;
+ case PCH_GBE_FC_FULL:
+ rx_fctrl |= PCH_GBE_FL_CTRL_EN;
+ mac->tx_fc_enable = true;
+ break;
+ default:
+ pr_err("Flow control param set incorrectly\n");
+ return -EINVAL;
+ }
+ if (mac->link_duplex == DUPLEX_HALF)
+ rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
+ iowrite32(rx_fctrl, &hw->reg->RX_FCTRL);
+ pr_debug("RX_FCTRL reg : 0x%08x mac->tx_fc_enable : %d\n",
+ ioread32(&hw->reg->RX_FCTRL), mac->tx_fc_enable);
+ return 0;
+}
+
+/**
+ * pch_gbe_mac_set_wol_event - Set wake-on-lan event
+ * @hw: Pointer to the HW structure
+ * @wu_evt: Wake up event
+ */
+static void pch_gbe_mac_set_wol_event(struct pch_gbe_hw *hw, u32 wu_evt)
+{
+ u32 addr_mask;
+
+ pr_debug("wu_evt : 0x%08x ADDR_MASK reg : 0x%08x\n",
+ wu_evt, ioread32(&hw->reg->ADDR_MASK));
+
+ if (wu_evt) {
+ /* Set Wake-On-Lan address mask */
+ addr_mask = ioread32(&hw->reg->ADDR_MASK);
+ iowrite32(addr_mask, &hw->reg->WOL_ADDR_MASK);
+ /* wait busy */
+ pch_gbe_wait_clr_bit(&hw->reg->WOL_ADDR_MASK, PCH_GBE_WLA_BUSY);
+ iowrite32(0, &hw->reg->WOL_ST);
+ iowrite32((wu_evt | PCH_GBE_WLC_WOL_MODE), &hw->reg->WOL_CTRL);
+ iowrite32(0x02, &hw->reg->TCPIP_ACC);
+ iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
+ } else {
+ iowrite32(0, &hw->reg->WOL_CTRL);
+ iowrite32(0, &hw->reg->WOL_ST);
+ }
+ return;
+}
+
+/**
+ * pch_gbe_mac_ctrl_miim - Control MIIM interface
+ * @hw: Pointer to the HW structure
+ * @addr: Address of PHY
+ * @dir: Operetion. (Write or Read)
+ * @reg: Access register of PHY
+ * @data: Write data.
+ *
+ * Returns: Read date.
+ */
+u16 pch_gbe_mac_ctrl_miim(struct pch_gbe_hw *hw, u32 addr, u32 dir, u32 reg,
+ u16 data)
+{
+ u32 data_out = 0;
+ unsigned int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hw->miim_lock, flags);
+
+ for (i = 100; i; --i) {
+ if ((ioread32(&hw->reg->MIIM) & PCH_GBE_MIIM_OPER_READY))
+ break;
+ udelay(20);
+ }
+ if (i == 0) {
+ pr_err("pch-gbe.miim won't go Ready\n");
+ spin_unlock_irqrestore(&hw->miim_lock, flags);
+ return 0; /* No way to indicate timeout error */
+ }
+ iowrite32(((reg << PCH_GBE_MIIM_REG_ADDR_SHIFT) |
+ (addr << PCH_GBE_MIIM_PHY_ADDR_SHIFT) |
+ dir | data), &hw->reg->MIIM);
+ for (i = 0; i < 100; i++) {
+ udelay(20);
+ data_out = ioread32(&hw->reg->MIIM);
+ if ((data_out & PCH_GBE_MIIM_OPER_READY))
+ break;
+ }
+ spin_unlock_irqrestore(&hw->miim_lock, flags);
+
+ pr_debug("PHY %s: reg=%d, data=0x%04X\n",
+ dir == PCH_GBE_MIIM_OPER_READ ? "READ" : "WRITE", reg,
+ dir == PCH_GBE_MIIM_OPER_READ ? data_out : data);
+ return (u16) data_out;
+}
+
+/**
+ * pch_gbe_mac_set_pause_packet - Set pause packet
+ * @hw: Pointer to the HW structure
+ */
+static void pch_gbe_mac_set_pause_packet(struct pch_gbe_hw *hw)
+{
+ unsigned long tmp2, tmp3;
+
+ /* Set Pause packet */
+ tmp2 = hw->mac.addr[1];
+ tmp2 = (tmp2 << 8) | hw->mac.addr[0];
+ tmp2 = PCH_GBE_PAUSE_PKT2_VALUE | (tmp2 << 16);
+
+ tmp3 = hw->mac.addr[5];
+ tmp3 = (tmp3 << 8) | hw->mac.addr[4];
+ tmp3 = (tmp3 << 8) | hw->mac.addr[3];
+ tmp3 = (tmp3 << 8) | hw->mac.addr[2];
+
+ iowrite32(PCH_GBE_PAUSE_PKT1_VALUE, &hw->reg->PAUSE_PKT1);
+ iowrite32(tmp2, &hw->reg->PAUSE_PKT2);
+ iowrite32(tmp3, &hw->reg->PAUSE_PKT3);
+ iowrite32(PCH_GBE_PAUSE_PKT4_VALUE, &hw->reg->PAUSE_PKT4);
+ iowrite32(PCH_GBE_PAUSE_PKT5_VALUE, &hw->reg->PAUSE_PKT5);
+
+ /* Transmit Pause Packet */
+ iowrite32(PCH_GBE_PS_PKT_RQ, &hw->reg->PAUSE_REQ);
+
+ pr_debug("PAUSE_PKT1-5 reg : 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
+ ioread32(&hw->reg->PAUSE_PKT1), ioread32(&hw->reg->PAUSE_PKT2),
+ ioread32(&hw->reg->PAUSE_PKT3), ioread32(&hw->reg->PAUSE_PKT4),
+ ioread32(&hw->reg->PAUSE_PKT5));
+
+ return;
+}
+
+
+/**
+ * pch_gbe_alloc_queues - Allocate memory for all rings
+ * @adapter: Board private structure to initialize
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+static int pch_gbe_alloc_queues(struct pch_gbe_adapter *adapter)
+{
+ int size;
+
+ size = (int)sizeof(struct pch_gbe_tx_ring);
+ adapter->tx_ring = kzalloc(size, GFP_KERNEL);
+ if (!adapter->tx_ring)
+ return -ENOMEM;
+ size = (int)sizeof(struct pch_gbe_rx_ring);
+ adapter->rx_ring = kzalloc(size, GFP_KERNEL);
+ if (!adapter->rx_ring) {
+ kfree(adapter->tx_ring);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+/**
+ * pch_gbe_init_stats - Initialize status
+ * @adapter: Board private structure to initialize
+ */
+static void pch_gbe_init_stats(struct pch_gbe_adapter *adapter)
+{
+ memset(&adapter->stats, 0, sizeof(adapter->stats));
+ return;
+}
+
+/**
+ * pch_gbe_init_phy - Initialize PHY
+ * @adapter: Board private structure to initialize
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+static int pch_gbe_init_phy(struct pch_gbe_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ u32 addr;
+ u16 bmcr, stat;
+
+ /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
+ for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
+ adapter->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
+ bmcr = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMCR);
+ stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
+ stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
+ if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
+ break;
+ }
+ adapter->hw.phy.addr = adapter->mii.phy_id;
+ pr_debug("phy_addr = %d\n", adapter->mii.phy_id);
+ if (addr == 32)
+ return -EAGAIN;
+ /* Selected the phy and isolate the rest */
+ for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
+ if (addr != adapter->mii.phy_id) {
+ pch_gbe_mdio_write(netdev, addr, MII_BMCR,
+ BMCR_ISOLATE);
+ } else {
+ bmcr = pch_gbe_mdio_read(netdev, addr, MII_BMCR);
+ pch_gbe_mdio_write(netdev, addr, MII_BMCR,
+ bmcr & ~BMCR_ISOLATE);
+ }
+ }
+
+ /* MII setup */
+ adapter->mii.phy_id_mask = 0x1F;
+ adapter->mii.reg_num_mask = 0x1F;
+ adapter->mii.dev = adapter->netdev;
+ adapter->mii.mdio_read = pch_gbe_mdio_read;
+ adapter->mii.mdio_write = pch_gbe_mdio_write;
+ adapter->mii.supports_gmii = mii_check_gmii_support(&adapter->mii);
+ return 0;
+}
+
+/**
+ * pch_gbe_mdio_read - The read function for mii
+ * @netdev: Network interface device structure
+ * @addr: Phy ID
+ * @reg: Access location
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+
+ return pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_READ, reg,
+ (u16) 0);
+}
+
+/**
+ * pch_gbe_mdio_write - The write function for mii
+ * @netdev: Network interface device structure
+ * @addr: Phy ID (not used)
+ * @reg: Access location
+ * @data: Write data
+ */
+static void pch_gbe_mdio_write(struct net_device *netdev,
+ int addr, int reg, int data)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+
+ pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_WRITE, reg, data);
+}
+
+/**
+ * pch_gbe_reset_task - Reset processing at the time of transmission timeout
+ * @work: Pointer of board private structure
+ */
+static void pch_gbe_reset_task(struct work_struct *work)
+{
+ struct pch_gbe_adapter *adapter;
+ adapter = container_of(work, struct pch_gbe_adapter, reset_task);
+
+ pch_gbe_reinit_locked(adapter);
+}
+
+/**
+ * pch_gbe_reinit_locked- Re-initialization
+ * @adapter: Board private structure
+ */
+void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+
+ rtnl_lock();
+ if (netif_running(netdev)) {
+ pch_gbe_down(adapter);
+ pch_gbe_up(adapter);
+ }
+ rtnl_unlock();
+}
+
+/**
+ * pch_gbe_reset - Reset GbE
+ * @adapter: Board private structure
+ */
+void pch_gbe_reset(struct pch_gbe_adapter *adapter)
+{
+ pch_gbe_mac_reset_hw(&adapter->hw);
+ /* Setup the receive address. */
+ pch_gbe_mac_init_rx_addrs(&adapter->hw, PCH_GBE_MAR_ENTRIES);
+ if (pch_gbe_hal_init_hw(&adapter->hw))
+ pr_err("Hardware Error\n");
+}
+
+/**
+ * pch_gbe_free_irq - Free an interrupt
+ * @adapter: Board private structure
+ */
+static void pch_gbe_free_irq(struct pch_gbe_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+
+ free_irq(adapter->pdev->irq, netdev);
+ if (adapter->have_msi) {
+ pci_disable_msi(adapter->pdev);
+ pr_debug("call pci_disable_msi\n");
+ }
+}
+
+/**
+ * pch_gbe_irq_disable - Mask off interrupt generation on the NIC
+ * @adapter: Board private structure
+ */
+static void pch_gbe_irq_disable(struct pch_gbe_adapter *adapter)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+
+ atomic_inc(&adapter->irq_sem);
+ iowrite32(0, &hw->reg->INT_EN);
+ ioread32(&hw->reg->INT_ST);
+ synchronize_irq(adapter->pdev->irq);
+
+ pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
+}
+
+/**
+ * pch_gbe_irq_enable - Enable default interrupt generation settings
+ * @adapter: Board private structure
+ */
+static void pch_gbe_irq_enable(struct pch_gbe_adapter *adapter)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+
+ if (likely(atomic_dec_and_test(&adapter->irq_sem)))
+ iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
+ ioread32(&hw->reg->INT_ST);
+ pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
+}
+
+
+
+/**
+ * pch_gbe_setup_tctl - configure the Transmit control registers
+ * @adapter: Board private structure
+ */
+static void pch_gbe_setup_tctl(struct pch_gbe_adapter *adapter)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ u32 tx_mode, tcpip;
+
+ tx_mode = PCH_GBE_TM_LONG_PKT |
+ PCH_GBE_TM_ST_AND_FD |
+ PCH_GBE_TM_SHORT_PKT |
+ PCH_GBE_TM_TH_TX_STRT_8 |
+ PCH_GBE_TM_TH_ALM_EMP_4 | PCH_GBE_TM_TH_ALM_FULL_8;
+
+ iowrite32(tx_mode, &hw->reg->TX_MODE);
+
+ tcpip = ioread32(&hw->reg->TCPIP_ACC);
+ tcpip |= PCH_GBE_TX_TCPIPACC_EN;
+ iowrite32(tcpip, &hw->reg->TCPIP_ACC);
+ return;
+}
+
+/**
+ * pch_gbe_configure_tx - Configure Transmit Unit after Reset
+ * @adapter: Board private structure
+ */
+static void pch_gbe_configure_tx(struct pch_gbe_adapter *adapter)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ u32 tdba, tdlen, dctrl;
+
+ pr_debug("dma addr = 0x%08llx size = 0x%08x\n",
+ (unsigned long long)adapter->tx_ring->dma,
+ adapter->tx_ring->size);
+
+ /* Setup the HW Tx Head and Tail descriptor pointers */
+ tdba = adapter->tx_ring->dma;
+ tdlen = adapter->tx_ring->size - 0x10;
+ iowrite32(tdba, &hw->reg->TX_DSC_BASE);
+ iowrite32(tdlen, &hw->reg->TX_DSC_SIZE);
+ iowrite32(tdba, &hw->reg->TX_DSC_SW_P);
+
+ /* Enables Transmission DMA */
+ dctrl = ioread32(&hw->reg->DMA_CTRL);
+ dctrl |= PCH_GBE_TX_DMA_EN;
+ iowrite32(dctrl, &hw->reg->DMA_CTRL);
+}
+
+/**
+ * pch_gbe_setup_rctl - Configure the receive control registers
+ * @adapter: Board private structure
+ */
+static void pch_gbe_setup_rctl(struct pch_gbe_adapter *adapter)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ u32 rx_mode, tcpip;
+
+ rx_mode = PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN |
+ PCH_GBE_RH_ALM_EMP_4 | PCH_GBE_RH_ALM_FULL_4 | PCH_GBE_RH_RD_TRG_8;
+
+ iowrite32(rx_mode, &hw->reg->RX_MODE);
+
+ tcpip = ioread32(&hw->reg->TCPIP_ACC);
+
+ if (adapter->rx_csum) {
+ tcpip &= ~PCH_GBE_RX_TCPIPACC_OFF;
+ tcpip |= PCH_GBE_RX_TCPIPACC_EN;
+ } else {
+ tcpip |= PCH_GBE_RX_TCPIPACC_OFF;
+ tcpip &= ~PCH_GBE_RX_TCPIPACC_EN;
+ }
+ iowrite32(tcpip, &hw->reg->TCPIP_ACC);
+ return;
+}
+
+/**
+ * pch_gbe_configure_rx - Configure Receive Unit after Reset
+ * @adapter: Board private structure
+ */
+static void pch_gbe_configure_rx(struct pch_gbe_adapter *adapter)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ u32 rdba, rdlen, rctl, rxdma;
+
+ pr_debug("dma adr = 0x%08llx size = 0x%08x\n",
+ (unsigned long long)adapter->rx_ring->dma,
+ adapter->rx_ring->size);
+
+ pch_gbe_mac_force_mac_fc(hw);
+
+ /* Disables Receive MAC */
+ rctl = ioread32(&hw->reg->MAC_RX_EN);
+ iowrite32((rctl & ~PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
+
+ /* Disables Receive DMA */
+ rxdma = ioread32(&hw->reg->DMA_CTRL);
+ rxdma &= ~PCH_GBE_RX_DMA_EN;
+ iowrite32(rxdma, &hw->reg->DMA_CTRL);
+
+ pr_debug("MAC_RX_EN reg = 0x%08x DMA_CTRL reg = 0x%08x\n",
+ ioread32(&hw->reg->MAC_RX_EN),
+ ioread32(&hw->reg->DMA_CTRL));
+
+ /* Setup the HW Rx Head and Tail Descriptor Pointers and
+ * the Base and Length of the Rx Descriptor Ring */
+ rdba = adapter->rx_ring->dma;
+ rdlen = adapter->rx_ring->size - 0x10;
+ iowrite32(rdba, &hw->reg->RX_DSC_BASE);
+ iowrite32(rdlen, &hw->reg->RX_DSC_SIZE);
+ iowrite32((rdba + rdlen), &hw->reg->RX_DSC_SW_P);
+
+ /* Enables Receive DMA */
+ rxdma = ioread32(&hw->reg->DMA_CTRL);
+ rxdma |= PCH_GBE_RX_DMA_EN;
+ iowrite32(rxdma, &hw->reg->DMA_CTRL);
+ /* Enables Receive */
+ iowrite32(PCH_GBE_MRE_MAC_RX_EN, &hw->reg->MAC_RX_EN);
+}
+
+/**
+ * pch_gbe_unmap_and_free_tx_resource - Unmap and free tx socket buffer
+ * @adapter: Board private structure
+ * @buffer_info: Buffer information structure
+ */
+static void pch_gbe_unmap_and_free_tx_resource(
+ struct pch_gbe_adapter *adapter, struct pch_gbe_buffer *buffer_info)
+{
+ if (buffer_info->mapped) {
+ dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
+ buffer_info->length, DMA_TO_DEVICE);
+ buffer_info->mapped = false;
+ }
+ if (buffer_info->skb) {
+ dev_kfree_skb_any(buffer_info->skb);
+ buffer_info->skb = NULL;
+ }
+}
+
+/**
+ * pch_gbe_unmap_and_free_rx_resource - Unmap and free rx socket buffer
+ * @adapter: Board private structure
+ * @buffer_info: Buffer information structure
+ */
+static void pch_gbe_unmap_and_free_rx_resource(
+ struct pch_gbe_adapter *adapter,
+ struct pch_gbe_buffer *buffer_info)
+{
+ if (buffer_info->mapped) {
+ dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
+ buffer_info->length, DMA_FROM_DEVICE);
+ buffer_info->mapped = false;
+ }
+ if (buffer_info->skb) {
+ dev_kfree_skb_any(buffer_info->skb);
+ buffer_info->skb = NULL;
+ }
+}
+
+/**
+ * pch_gbe_clean_tx_ring - Free Tx Buffers
+ * @adapter: Board private structure
+ * @tx_ring: Ring to be cleaned
+ */
+static void pch_gbe_clean_tx_ring(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_tx_ring *tx_ring)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ struct pch_gbe_buffer *buffer_info;
+ unsigned long size;
+ unsigned int i;
+
+ /* Free all the Tx ring sk_buffs */
+ for (i = 0; i < tx_ring->count; i++) {
+ buffer_info = &tx_ring->buffer_info[i];
+ pch_gbe_unmap_and_free_tx_resource(adapter, buffer_info);
+ }
+ pr_debug("call pch_gbe_unmap_and_free_tx_resource() %d count\n", i);
+
+ size = (unsigned long)sizeof(struct pch_gbe_buffer) * tx_ring->count;
+ memset(tx_ring->buffer_info, 0, size);
+
+ /* Zero out the descriptor ring */
+ memset(tx_ring->desc, 0, tx_ring->size);
+ tx_ring->next_to_use = 0;
+ tx_ring->next_to_clean = 0;
+ iowrite32(tx_ring->dma, &hw->reg->TX_DSC_HW_P);
+ iowrite32((tx_ring->size - 0x10), &hw->reg->TX_DSC_SIZE);
+}
+
+/**
+ * pch_gbe_clean_rx_ring - Free Rx Buffers
+ * @adapter: Board private structure
+ * @rx_ring: Ring to free buffers from
+ */
+static void
+pch_gbe_clean_rx_ring(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_rx_ring *rx_ring)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ struct pch_gbe_buffer *buffer_info;
+ unsigned long size;
+ unsigned int i;
+
+ /* Free all the Rx ring sk_buffs */
+ for (i = 0; i < rx_ring->count; i++) {
+ buffer_info = &rx_ring->buffer_info[i];
+ pch_gbe_unmap_and_free_rx_resource(adapter, buffer_info);
+ }
+ pr_debug("call pch_gbe_unmap_and_free_rx_resource() %d count\n", i);
+ size = (unsigned long)sizeof(struct pch_gbe_buffer) * rx_ring->count;
+ memset(rx_ring->buffer_info, 0, size);
+
+ /* Zero out the descriptor ring */
+ memset(rx_ring->desc, 0, rx_ring->size);
+ rx_ring->next_to_clean = 0;
+ rx_ring->next_to_use = 0;
+ iowrite32(rx_ring->dma, &hw->reg->RX_DSC_HW_P);
+ iowrite32((rx_ring->size - 0x10), &hw->reg->RX_DSC_SIZE);
+}
+
+static void pch_gbe_set_rgmii_ctrl(struct pch_gbe_adapter *adapter, u16 speed,
+ u16 duplex)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ unsigned long rgmii = 0;
+
+ /* Set the RGMII control. */
+#ifdef PCH_GBE_MAC_IFOP_RGMII
+ switch (speed) {
+ case SPEED_10:
+ rgmii = (PCH_GBE_RGMII_RATE_2_5M |
+ PCH_GBE_MAC_RGMII_CTRL_SETTING);
+ break;
+ case SPEED_100:
+ rgmii = (PCH_GBE_RGMII_RATE_25M |
+ PCH_GBE_MAC_RGMII_CTRL_SETTING);
+ break;
+ case SPEED_1000:
+ rgmii = (PCH_GBE_RGMII_RATE_125M |
+ PCH_GBE_MAC_RGMII_CTRL_SETTING);
+ break;
+ }
+ iowrite32(rgmii, &hw->reg->RGMII_CTRL);
+#else /* GMII */
+ rgmii = 0;
+ iowrite32(rgmii, &hw->reg->RGMII_CTRL);
+#endif
+}
+static void pch_gbe_set_mode(struct pch_gbe_adapter *adapter, u16 speed,
+ u16 duplex)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct pch_gbe_hw *hw = &adapter->hw;
+ unsigned long mode = 0;
+
+ /* Set the communication mode */
+ switch (speed) {
+ case SPEED_10:
+ mode = PCH_GBE_MODE_MII_ETHER;
+ netdev->tx_queue_len = 10;
+ break;
+ case SPEED_100:
+ mode = PCH_GBE_MODE_MII_ETHER;
+ netdev->tx_queue_len = 100;
+ break;
+ case SPEED_1000:
+ mode = PCH_GBE_MODE_GMII_ETHER;
+ break;
+ }
+ if (duplex == DUPLEX_FULL)
+ mode |= PCH_GBE_MODE_FULL_DUPLEX;
+ else
+ mode |= PCH_GBE_MODE_HALF_DUPLEX;
+ iowrite32(mode, &hw->reg->MODE);
+}
+
+/**
+ * pch_gbe_watchdog - Watchdog process
+ * @data: Board private structure
+ */
+static void pch_gbe_watchdog(unsigned long data)
+{
+ struct pch_gbe_adapter *adapter = (struct pch_gbe_adapter *)data;
+ struct net_device *netdev = adapter->netdev;
+ struct pch_gbe_hw *hw = &adapter->hw;
+ struct ethtool_cmd cmd;
+
+ pr_debug("right now = %ld\n", jiffies);
+
+ pch_gbe_update_stats(adapter);
+ if ((mii_link_ok(&adapter->mii)) && (!netif_carrier_ok(netdev))) {
+ netdev->tx_queue_len = adapter->tx_queue_len;
+ /* mii library handles link maintenance tasks */
+ if (mii_ethtool_gset(&adapter->mii, &cmd)) {
+ pr_err("ethtool get setting Error\n");
+ mod_timer(&adapter->watchdog_timer,
+ round_jiffies(jiffies +
+ PCH_GBE_WATCHDOG_PERIOD));
+ return;
+ }
+ hw->mac.link_speed = cmd.speed;
+ hw->mac.link_duplex = cmd.duplex;
+ /* Set the RGMII control. */
+ pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
+ hw->mac.link_duplex);
+ /* Set the communication mode */
+ pch_gbe_set_mode(adapter, hw->mac.link_speed,
+ hw->mac.link_duplex);
+ netdev_dbg(netdev,
+ "Link is Up %d Mbps %s-Duplex\n",
+ cmd.speed,
+ cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
+ netif_carrier_on(netdev);
+ netif_wake_queue(netdev);
+ } else if ((!mii_link_ok(&adapter->mii)) &&
+ (netif_carrier_ok(netdev))) {
+ netdev_dbg(netdev, "NIC Link is Down\n");
+ hw->mac.link_speed = SPEED_10;
+ hw->mac.link_duplex = DUPLEX_HALF;
+ netif_carrier_off(netdev);
+ netif_stop_queue(netdev);
+ }
+ mod_timer(&adapter->watchdog_timer,
+ round_jiffies(jiffies + PCH_GBE_WATCHDOG_PERIOD));
+}
+
+/**
+ * pch_gbe_tx_queue - Carry out queuing of the transmission data
+ * @adapter: Board private structure
+ * @tx_ring: Tx descriptor ring structure
+ * @skb: Sockt buffer structure
+ */
+static void pch_gbe_tx_queue(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_tx_ring *tx_ring,
+ struct sk_buff *skb)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ struct pch_gbe_tx_desc *tx_desc;
+ struct pch_gbe_buffer *buffer_info;
+ struct sk_buff *tmp_skb;
+ unsigned int frame_ctrl;
+ unsigned int ring_num;
+ unsigned long flags;
+
+ /*-- Set frame control --*/
+ frame_ctrl = 0;
+ if (unlikely(skb->len < PCH_GBE_SHORT_PKT))
+ frame_ctrl |= PCH_GBE_TXD_CTRL_APAD;
+ if (unlikely(!adapter->tx_csum))
+ frame_ctrl |= PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
+
+ /* Performs checksum processing */
+ /*
+ * It is because the hardware accelerator does not support a checksum,
+ * when the received data size is less than 64 bytes.
+ */
+ if ((skb->len < PCH_GBE_SHORT_PKT) && (adapter->tx_csum)) {
+ frame_ctrl |= PCH_GBE_TXD_CTRL_APAD |
+ PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
+ if (skb->protocol == htons(ETH_P_IP)) {
+ struct iphdr *iph = ip_hdr(skb);
+ unsigned int offset;
+ iph->check = 0;
+ iph->check = ip_fast_csum((u8 *) iph, iph->ihl);
+ offset = skb_transport_offset(skb);
+ if (iph->protocol == IPPROTO_TCP) {
+ skb->csum = 0;
+ tcp_hdr(skb)->check = 0;
+ skb->csum = skb_checksum(skb, offset,
+ skb->len - offset, 0);
+ tcp_hdr(skb)->check =
+ csum_tcpudp_magic(iph->saddr,
+ iph->daddr,
+ skb->len - offset,
+ IPPROTO_TCP,
+ skb->csum);
+ } else if (iph->protocol == IPPROTO_UDP) {
+ skb->csum = 0;
+ udp_hdr(skb)->check = 0;
+ skb->csum =
+ skb_checksum(skb, offset,
+ skb->len - offset, 0);
+ udp_hdr(skb)->check =
+ csum_tcpudp_magic(iph->saddr,
+ iph->daddr,
+ skb->len - offset,
+ IPPROTO_UDP,
+ skb->csum);
+ }
+ }
+ }
+ spin_lock_irqsave(&tx_ring->tx_lock, flags);
+ ring_num = tx_ring->next_to_use;
+ if (unlikely((ring_num + 1) == tx_ring->count))
+ tx_ring->next_to_use = 0;
+ else
+ tx_ring->next_to_use = ring_num + 1;
+
+ spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
+ buffer_info = &tx_ring->buffer_info[ring_num];
+ tmp_skb = buffer_info->skb;
+
+ /* [Header:14][payload] ---> [Header:14][paddong:2][payload] */
+ memcpy(tmp_skb->data, skb->data, ETH_HLEN);
+ tmp_skb->data[ETH_HLEN] = 0x00;
+ tmp_skb->data[ETH_HLEN + 1] = 0x00;
+ tmp_skb->len = skb->len;
+ memcpy(&tmp_skb->data[ETH_HLEN + 2], &skb->data[ETH_HLEN],
+ (skb->len - ETH_HLEN));
+ /*-- Set Buffer infomation --*/
+ buffer_info->length = tmp_skb->len;
+ buffer_info->dma = dma_map_single(&adapter->pdev->dev, tmp_skb->data,
+ buffer_info->length,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
+ pr_err("TX DMA map failed\n");
+ buffer_info->dma = 0;
+ buffer_info->time_stamp = 0;
+ tx_ring->next_to_use = ring_num;
+ return;
+ }
+ buffer_info->mapped = true;
+ buffer_info->time_stamp = jiffies;
+
+ /*-- Set Tx descriptor --*/
+ tx_desc = PCH_GBE_TX_DESC(*tx_ring, ring_num);
+ tx_desc->buffer_addr = (buffer_info->dma);
+ tx_desc->length = (tmp_skb->len);
+ tx_desc->tx_words_eob = ((tmp_skb->len + 3));
+ tx_desc->tx_frame_ctrl = (frame_ctrl);
+ tx_desc->gbec_status = (DSC_INIT16);
+
+ if (unlikely(++ring_num == tx_ring->count))
+ ring_num = 0;
+
+ /* Update software pointer of TX descriptor */
+ iowrite32(tx_ring->dma +
+ (int)sizeof(struct pch_gbe_tx_desc) * ring_num,
+ &hw->reg->TX_DSC_SW_P);
+ dev_kfree_skb_any(skb);
+}
+
+/**
+ * pch_gbe_update_stats - Update the board statistics counters
+ * @adapter: Board private structure
+ */
+void pch_gbe_update_stats(struct pch_gbe_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct pci_dev *pdev = adapter->pdev;
+ struct pch_gbe_hw_stats *stats = &adapter->stats;
+ unsigned long flags;
+
+ /*
+ * Prevent stats update while adapter is being reset, or if the pci
+ * connection is down.
+ */
+ if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
+ return;
+
+ spin_lock_irqsave(&adapter->stats_lock, flags);
+
+ /* Update device status "adapter->stats" */
+ stats->rx_errors = stats->rx_crc_errors + stats->rx_frame_errors;
+ stats->tx_errors = stats->tx_length_errors +
+ stats->tx_aborted_errors +
+ stats->tx_carrier_errors + stats->tx_timeout_count;
+
+ /* Update network device status "adapter->net_stats" */
+ netdev->stats.rx_packets = stats->rx_packets;
+ netdev->stats.rx_bytes = stats->rx_bytes;
+ netdev->stats.rx_dropped = stats->rx_dropped;
+ netdev->stats.tx_packets = stats->tx_packets;
+ netdev->stats.tx_bytes = stats->tx_bytes;
+ netdev->stats.tx_dropped = stats->tx_dropped;
+ /* Fill out the OS statistics structure */
+ netdev->stats.multicast = stats->multicast;
+ netdev->stats.collisions = stats->collisions;
+ /* Rx Errors */
+ netdev->stats.rx_errors = stats->rx_errors;
+ netdev->stats.rx_crc_errors = stats->rx_crc_errors;
+ netdev->stats.rx_frame_errors = stats->rx_frame_errors;
+ /* Tx Errors */
+ netdev->stats.tx_errors = stats->tx_errors;
+ netdev->stats.tx_aborted_errors = stats->tx_aborted_errors;
+ netdev->stats.tx_carrier_errors = stats->tx_carrier_errors;
+
+ spin_unlock_irqrestore(&adapter->stats_lock, flags);
+}
+
+/**
+ * pch_gbe_intr - Interrupt Handler
+ * @irq: Interrupt number
+ * @data: Pointer to a network interface device structure
+ * Returns
+ * - IRQ_HANDLED: Our interrupt
+ * - IRQ_NONE: Not our interrupt
+ */
+static irqreturn_t pch_gbe_intr(int irq, void *data)
+{
+ struct net_device *netdev = data;
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+ u32 int_st;
+ u32 int_en;
+
+ /* Check request status */
+ int_st = ioread32(&hw->reg->INT_ST);
+ int_st = int_st & ioread32(&hw->reg->INT_EN);
+ /* When request status is no interruption factor */
+ if (unlikely(!int_st))
+ return IRQ_NONE; /* Not our interrupt. End processing. */
+ pr_debug("%s occur int_st = 0x%08x\n", __func__, int_st);
+ if (int_st & PCH_GBE_INT_RX_FRAME_ERR)
+ adapter->stats.intr_rx_frame_err_count++;
+ if (int_st & PCH_GBE_INT_RX_FIFO_ERR)
+ adapter->stats.intr_rx_fifo_err_count++;
+ if (int_st & PCH_GBE_INT_RX_DMA_ERR)
+ adapter->stats.intr_rx_dma_err_count++;
+ if (int_st & PCH_GBE_INT_TX_FIFO_ERR)
+ adapter->stats.intr_tx_fifo_err_count++;
+ if (int_st & PCH_GBE_INT_TX_DMA_ERR)
+ adapter->stats.intr_tx_dma_err_count++;
+ if (int_st & PCH_GBE_INT_TCPIP_ERR)
+ adapter->stats.intr_tcpip_err_count++;
+ /* When Rx descriptor is empty */
+ if ((int_st & PCH_GBE_INT_RX_DSC_EMP)) {
+ adapter->stats.intr_rx_dsc_empty_count++;
+ pr_err("Rx descriptor is empty\n");
+ int_en = ioread32(&hw->reg->INT_EN);
+ iowrite32((int_en & ~PCH_GBE_INT_RX_DSC_EMP), &hw->reg->INT_EN);
+ if (hw->mac.tx_fc_enable) {
+ /* Set Pause packet */
+ pch_gbe_mac_set_pause_packet(hw);
+ }
+ if ((int_en & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))
+ == 0) {
+ return IRQ_HANDLED;
+ }
+ }
+
+ /* When request status is Receive interruption */
+ if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))) {
+ if (likely(napi_schedule_prep(&adapter->napi))) {
+ /* Enable only Rx Descriptor empty */
+ atomic_inc(&adapter->irq_sem);
+ int_en = ioread32(&hw->reg->INT_EN);
+ int_en &=
+ ~(PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT);
+ iowrite32(int_en, &hw->reg->INT_EN);
+ /* Start polling for NAPI */
+ __napi_schedule(&adapter->napi);
+ }
+ }
+ pr_debug("return = 0x%08x INT_EN reg = 0x%08x\n",
+ IRQ_HANDLED, ioread32(&hw->reg->INT_EN));
+ return IRQ_HANDLED;
+}
+
+/**
+ * pch_gbe_alloc_rx_buffers - Replace used receive buffers; legacy & extended
+ * @adapter: Board private structure
+ * @rx_ring: Rx descriptor ring
+ * @cleaned_count: Cleaned count
+ */
+static void
+pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct pci_dev *pdev = adapter->pdev;
+ struct pch_gbe_hw *hw = &adapter->hw;
+ struct pch_gbe_rx_desc *rx_desc;
+ struct pch_gbe_buffer *buffer_info;
+ struct sk_buff *skb;
+ unsigned int i;
+ unsigned int bufsz;
+
+ bufsz = adapter->rx_buffer_len + PCH_GBE_DMA_ALIGN;
+ i = rx_ring->next_to_use;
+
+ while ((cleaned_count--)) {
+ buffer_info = &rx_ring->buffer_info[i];
+ skb = buffer_info->skb;
+ if (skb) {
+ skb_trim(skb, 0);
+ } else {
+ skb = netdev_alloc_skb(netdev, bufsz);
+ if (unlikely(!skb)) {
+ /* Better luck next round */
+ adapter->stats.rx_alloc_buff_failed++;
+ break;
+ }
+ /* 64byte align */
+ skb_reserve(skb, PCH_GBE_DMA_ALIGN);
+
+ buffer_info->skb = skb;
+ buffer_info->length = adapter->rx_buffer_len;
+ }
+ buffer_info->dma = dma_map_single(&pdev->dev,
+ skb->data,
+ buffer_info->length,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
+ dev_kfree_skb(skb);
+ buffer_info->skb = NULL;
+ buffer_info->dma = 0;
+ adapter->stats.rx_alloc_buff_failed++;
+ break; /* while !buffer_info->skb */
+ }
+ buffer_info->mapped = true;
+ rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
+ rx_desc->buffer_addr = (buffer_info->dma);
+ rx_desc->gbec_status = DSC_INIT16;
+
+ pr_debug("i = %d buffer_info->dma = 0x08%llx buffer_info->length = 0x%x\n",
+ i, (unsigned long long)buffer_info->dma,
+ buffer_info->length);
+
+ if (unlikely(++i == rx_ring->count))
+ i = 0;
+ }
+ if (likely(rx_ring->next_to_use != i)) {
+ rx_ring->next_to_use = i;
+ if (unlikely(i-- == 0))
+ i = (rx_ring->count - 1);
+ iowrite32(rx_ring->dma +
+ (int)sizeof(struct pch_gbe_rx_desc) * i,
+ &hw->reg->RX_DSC_SW_P);
+ }
+ return;
+}
+
+/**
+ * pch_gbe_alloc_tx_buffers - Allocate transmit buffers
+ * @adapter: Board private structure
+ * @tx_ring: Tx descriptor ring
+ */
+static void pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_tx_ring *tx_ring)
+{
+ struct pch_gbe_buffer *buffer_info;
+ struct sk_buff *skb;
+ unsigned int i;
+ unsigned int bufsz;
+ struct pch_gbe_tx_desc *tx_desc;
+
+ bufsz =
+ adapter->hw.mac.max_frame_size + PCH_GBE_DMA_ALIGN + NET_IP_ALIGN;
+
+ for (i = 0; i < tx_ring->count; i++) {
+ buffer_info = &tx_ring->buffer_info[i];
+ skb = netdev_alloc_skb(adapter->netdev, bufsz);
+ skb_reserve(skb, PCH_GBE_DMA_ALIGN);
+ buffer_info->skb = skb;
+ tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
+ tx_desc->gbec_status = (DSC_INIT16);
+ }
+ return;
+}
+
+/**
+ * pch_gbe_clean_tx - Reclaim resources after transmit completes
+ * @adapter: Board private structure
+ * @tx_ring: Tx descriptor ring
+ * Returns
+ * true: Cleaned the descriptor
+ * false: Not cleaned the descriptor
+ */
+static bool
+pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_tx_ring *tx_ring)
+{
+ struct pch_gbe_tx_desc *tx_desc;
+ struct pch_gbe_buffer *buffer_info;
+ struct sk_buff *skb;
+ unsigned int i;
+ unsigned int cleaned_count = 0;
+ bool cleaned = false;
+
+ pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
+
+ i = tx_ring->next_to_clean;
+ tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
+ pr_debug("gbec_status:0x%04x dma_status:0x%04x\n",
+ tx_desc->gbec_status, tx_desc->dma_status);
+
+ while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
+ pr_debug("gbec_status:0x%04x\n", tx_desc->gbec_status);
+ cleaned = true;
+ buffer_info = &tx_ring->buffer_info[i];
+ skb = buffer_info->skb;
+
+ if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
+ adapter->stats.tx_aborted_errors++;
+ pr_err("Transfer Abort Error\n");
+ } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CRSER)
+ ) {
+ adapter->stats.tx_carrier_errors++;
+ pr_err("Transfer Carrier Sense Error\n");
+ } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_EXCOL)
+ ) {
+ adapter->stats.tx_aborted_errors++;
+ pr_err("Transfer Collision Abort Error\n");
+ } else if ((tx_desc->gbec_status &
+ (PCH_GBE_TXD_GMAC_STAT_SNGCOL |
+ PCH_GBE_TXD_GMAC_STAT_MLTCOL))) {
+ adapter->stats.collisions++;
+ adapter->stats.tx_packets++;
+ adapter->stats.tx_bytes += skb->len;
+ pr_debug("Transfer Collision\n");
+ } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CMPLT)
+ ) {
+ adapter->stats.tx_packets++;
+ adapter->stats.tx_bytes += skb->len;
+ }
+ if (buffer_info->mapped) {
+ pr_debug("unmap buffer_info->dma : %d\n", i);
+ dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
+ buffer_info->length, DMA_TO_DEVICE);
+ buffer_info->mapped = false;
+ }
+ if (buffer_info->skb) {
+ pr_debug("trim buffer_info->skb : %d\n", i);
+ skb_trim(buffer_info->skb, 0);
+ }
+ tx_desc->gbec_status = DSC_INIT16;
+ if (unlikely(++i == tx_ring->count))
+ i = 0;
+ tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
+
+ /* weight of a sort for tx, to avoid endless transmit cleanup */
+ if (cleaned_count++ == PCH_GBE_TX_WEIGHT)
+ break;
+ }
+ pr_debug("called pch_gbe_unmap_and_free_tx_resource() %d count\n",
+ cleaned_count);
+ /* Recover from running out of Tx resources in xmit_frame */
+ if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev)))) {
+ netif_wake_queue(adapter->netdev);
+ adapter->stats.tx_restart_count++;
+ pr_debug("Tx wake queue\n");
+ }
+ spin_lock(&adapter->tx_queue_lock);
+ tx_ring->next_to_clean = i;
+ spin_unlock(&adapter->tx_queue_lock);
+ pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
+ return cleaned;
+}
+
+/**
+ * pch_gbe_clean_rx - Send received data up the network stack; legacy
+ * @adapter: Board private structure
+ * @rx_ring: Rx descriptor ring
+ * @work_done: Completed count
+ * @work_to_do: Request count
+ * Returns
+ * true: Cleaned the descriptor
+ * false: Not cleaned the descriptor
+ */
+static bool
+pch_gbe_clean_rx(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_rx_ring *rx_ring,
+ int *work_done, int work_to_do)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct pci_dev *pdev = adapter->pdev;
+ struct pch_gbe_buffer *buffer_info;
+ struct pch_gbe_rx_desc *rx_desc;
+ u32 length;
+ unsigned char tmp_packet[ETH_HLEN];
+ unsigned int i;
+ unsigned int cleaned_count = 0;
+ bool cleaned = false;
+ struct sk_buff *skb;
+ u8 dma_status;
+ u16 gbec_status;
+ u32 tcp_ip_status;
+ u8 skb_copy_flag = 0;
+ u8 skb_padding_flag = 0;
+
+ i = rx_ring->next_to_clean;
+
+ while (*work_done < work_to_do) {
+ /* Check Rx descriptor status */
+ rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
+ if (rx_desc->gbec_status == DSC_INIT16)
+ break;
+ cleaned = true;
+ cleaned_count++;
+
+ dma_status = rx_desc->dma_status;
+ gbec_status = rx_desc->gbec_status;
+ tcp_ip_status = rx_desc->tcp_ip_status;
+ rx_desc->gbec_status = DSC_INIT16;
+ buffer_info = &rx_ring->buffer_info[i];
+ skb = buffer_info->skb;
+
+ /* unmap dma */
+ dma_unmap_single(&pdev->dev, buffer_info->dma,
+ buffer_info->length, DMA_FROM_DEVICE);
+ buffer_info->mapped = false;
+ /* Prefetch the packet */
+ prefetch(skb->data);
+
+ pr_debug("RxDecNo = 0x%04x Status[DMA:0x%02x GBE:0x%04x "
+ "TCP:0x%08x] BufInf = 0x%p\n",
+ i, dma_status, gbec_status, tcp_ip_status,
+ buffer_info);
+ /* Error check */
+ if (unlikely(gbec_status & PCH_GBE_RXD_GMAC_STAT_NOTOCTAL)) {
+ adapter->stats.rx_frame_errors++;
+ pr_err("Receive Not Octal Error\n");
+ } else if (unlikely(gbec_status &
+ PCH_GBE_RXD_GMAC_STAT_NBLERR)) {
+ adapter->stats.rx_frame_errors++;
+ pr_err("Receive Nibble Error\n");
+ } else if (unlikely(gbec_status &
+ PCH_GBE_RXD_GMAC_STAT_CRCERR)) {
+ adapter->stats.rx_crc_errors++;
+ pr_err("Receive CRC Error\n");
+ } else {
+ /* get receive length */
+ /* length convert[-3], padding[-2] */
+ length = (rx_desc->rx_words_eob) - 3 - 2;
+
+ /* Decide the data conversion method */
+ if (!adapter->rx_csum) {
+ /* [Header:14][payload] */
+ skb_padding_flag = 0;
+ skb_copy_flag = 1;
+ } else {
+ /* [Header:14][padding:2][payload] */
+ skb_padding_flag = 1;
+ if (length < copybreak)
+ skb_copy_flag = 1;
+ else
+ skb_copy_flag = 0;
+ }
+
+ /* Data conversion */
+ if (skb_copy_flag) { /* recycle skb */
+ struct sk_buff *new_skb;
+ new_skb =
+ netdev_alloc_skb(netdev,
+ length + NET_IP_ALIGN);
+ if (new_skb) {
+ if (!skb_padding_flag) {
+ skb_reserve(new_skb,
+ NET_IP_ALIGN);
+ }
+ memcpy(new_skb->data, skb->data,
+ length);
+ /* save the skb
+ * in buffer_info as good */
+ skb = new_skb;
+ } else if (!skb_padding_flag) {
+ /* dorrop error */
+ pr_err("New skb allocation Error\n");
+ goto dorrop;
+ }
+ } else {
+ buffer_info->skb = NULL;
+ }
+ if (skb_padding_flag) {
+ memcpy(&tmp_packet[0], &skb->data[0], ETH_HLEN);
+ memcpy(&skb->data[NET_IP_ALIGN], &tmp_packet[0],
+ ETH_HLEN);
+ skb_reserve(skb, NET_IP_ALIGN);
+
+ }
+
+ /* update status of driver */
+ adapter->stats.rx_bytes += length;
+ adapter->stats.rx_packets++;
+ if ((gbec_status & PCH_GBE_RXD_GMAC_STAT_MARMLT))
+ adapter->stats.multicast++;
+ /* Write meta date of skb */
+ skb_put(skb, length);
+ skb->protocol = eth_type_trans(skb, netdev);
+ if ((tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK) ==
+ PCH_GBE_RXD_ACC_STAT_TCPIPOK) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ } else {
+ skb->ip_summed = CHECKSUM_NONE;
+ }
+ napi_gro_receive(&adapter->napi, skb);
+ (*work_done)++;
+ pr_debug("Receive skb->ip_summed: %d length: %d\n",
+ skb->ip_summed, length);
+ }
+dorrop:
+ /* return some buffers to hardware, one at a time is too slow */
+ if (unlikely(cleaned_count >= PCH_GBE_RX_BUFFER_WRITE)) {
+ pch_gbe_alloc_rx_buffers(adapter, rx_ring,
+ cleaned_count);
+ cleaned_count = 0;
+ }
+ if (++i == rx_ring->count)
+ i = 0;
+ }
+ rx_ring->next_to_clean = i;
+ if (cleaned_count)
+ pch_gbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
+ return cleaned;
+}
+
+/**
+ * pch_gbe_setup_tx_resources - Allocate Tx resources (Descriptors)
+ * @adapter: Board private structure
+ * @tx_ring: Tx descriptor ring (for a specific queue) to setup
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+int pch_gbe_setup_tx_resources(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_tx_ring *tx_ring)
+{
+ struct pci_dev *pdev = adapter->pdev;
+ struct pch_gbe_tx_desc *tx_desc;
+ int size;
+ int desNo;
+
+ size = (int)sizeof(struct pch_gbe_buffer) * tx_ring->count;
+ tx_ring->buffer_info = vmalloc(size);
+ if (!tx_ring->buffer_info) {
+ pr_err("Unable to allocate memory for the buffer infomation\n");
+ return -ENOMEM;
+ }
+ memset(tx_ring->buffer_info, 0, size);
+
+ tx_ring->size = tx_ring->count * (int)sizeof(struct pch_gbe_tx_desc);
+
+ tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
+ &tx_ring->dma, GFP_KERNEL);
+ if (!tx_ring->desc) {
+ vfree(tx_ring->buffer_info);
+ pr_err("Unable to allocate memory for the transmit descriptor ring\n");
+ return -ENOMEM;
+ }
+ memset(tx_ring->desc, 0, tx_ring->size);
+
+ tx_ring->next_to_use = 0;
+ tx_ring->next_to_clean = 0;
+ spin_lock_init(&tx_ring->tx_lock);
+
+ for (desNo = 0; desNo < tx_ring->count; desNo++) {
+ tx_desc = PCH_GBE_TX_DESC(*tx_ring, desNo);
+ tx_desc->gbec_status = DSC_INIT16;
+ }
+ pr_debug("tx_ring->desc = 0x%p tx_ring->dma = 0x%08llx\n"
+ "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
+ tx_ring->desc, (unsigned long long)tx_ring->dma,
+ tx_ring->next_to_clean, tx_ring->next_to_use);
+ return 0;
+}
+
+/**
+ * pch_gbe_setup_rx_resources - Allocate Rx resources (Descriptors)
+ * @adapter: Board private structure
+ * @rx_ring: Rx descriptor ring (for a specific queue) to setup
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+int pch_gbe_setup_rx_resources(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_rx_ring *rx_ring)
+{
+ struct pci_dev *pdev = adapter->pdev;
+ struct pch_gbe_rx_desc *rx_desc;
+ int size;
+ int desNo;
+
+ size = (int)sizeof(struct pch_gbe_buffer) * rx_ring->count;
+ rx_ring->buffer_info = vmalloc(size);
+ if (!rx_ring->buffer_info) {
+ pr_err("Unable to allocate memory for the receive descriptor ring\n");
+ return -ENOMEM;
+ }
+ memset(rx_ring->buffer_info, 0, size);
+ rx_ring->size = rx_ring->count * (int)sizeof(struct pch_gbe_rx_desc);
+ rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
+ &rx_ring->dma, GFP_KERNEL);
+
+ if (!rx_ring->desc) {
+ pr_err("Unable to allocate memory for the receive descriptor ring\n");
+ vfree(rx_ring->buffer_info);
+ return -ENOMEM;
+ }
+ memset(rx_ring->desc, 0, rx_ring->size);
+ rx_ring->next_to_clean = 0;
+ rx_ring->next_to_use = 0;
+ for (desNo = 0; desNo < rx_ring->count; desNo++) {
+ rx_desc = PCH_GBE_RX_DESC(*rx_ring, desNo);
+ rx_desc->gbec_status = DSC_INIT16;
+ }
+ pr_debug("rx_ring->desc = 0x%p rx_ring->dma = 0x%08llx "
+ "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
+ rx_ring->desc, (unsigned long long)rx_ring->dma,
+ rx_ring->next_to_clean, rx_ring->next_to_use);
+ return 0;
+}
+
+/**
+ * pch_gbe_free_tx_resources - Free Tx Resources
+ * @adapter: Board private structure
+ * @tx_ring: Tx descriptor ring for a specific queue
+ */
+void pch_gbe_free_tx_resources(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_tx_ring *tx_ring)
+{
+ struct pci_dev *pdev = adapter->pdev;
+
+ pch_gbe_clean_tx_ring(adapter, tx_ring);
+ vfree(tx_ring->buffer_info);
+ tx_ring->buffer_info = NULL;
+ pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
+ tx_ring->desc = NULL;
+}
+
+/**
+ * pch_gbe_free_rx_resources - Free Rx Resources
+ * @adapter: Board private structure
+ * @rx_ring: Ring to clean the resources from
+ */
+void pch_gbe_free_rx_resources(struct pch_gbe_adapter *adapter,
+ struct pch_gbe_rx_ring *rx_ring)
+{
+ struct pci_dev *pdev = adapter->pdev;
+
+ pch_gbe_clean_rx_ring(adapter, rx_ring);
+ vfree(rx_ring->buffer_info);
+ rx_ring->buffer_info = NULL;
+ pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
+ rx_ring->desc = NULL;
+}
+
+/**
+ * pch_gbe_request_irq - Allocate an interrupt line
+ * @adapter: Board private structure
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+static int pch_gbe_request_irq(struct pch_gbe_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ int err;
+ int flags;
+
+ flags = IRQF_SHARED;
+ adapter->have_msi = false;
+ err = pci_enable_msi(adapter->pdev);
+ pr_debug("call pci_enable_msi\n");
+ if (err) {
+ pr_debug("call pci_enable_msi - Error: %d\n", err);
+ } else {
+ flags = 0;
+ adapter->have_msi = true;
+ }
+ err = request_irq(adapter->pdev->irq, &pch_gbe_intr,
+ flags, netdev->name, netdev);
+ if (err)
+ pr_err("Unable to allocate interrupt Error: %d\n", err);
+ pr_debug("adapter->have_msi : %d flags : 0x%04x return : 0x%04x\n",
+ adapter->have_msi, flags, err);
+ return err;
+}
+
+
+static void pch_gbe_set_multi(struct net_device *netdev);
+/**
+ * pch_gbe_up - Up GbE network device
+ * @adapter: Board private structure
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+int pch_gbe_up(struct pch_gbe_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
+ struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
+ int err;
+
+ /* hardware has been reset, we need to reload some things */
+ pch_gbe_set_multi(netdev);
+
+ pch_gbe_setup_tctl(adapter);
+ pch_gbe_configure_tx(adapter);
+ pch_gbe_setup_rctl(adapter);
+ pch_gbe_configure_rx(adapter);
+
+ err = pch_gbe_request_irq(adapter);
+ if (err) {
+ pr_err("Error: can't bring device up\n");
+ return err;
+ }
+ pch_gbe_alloc_tx_buffers(adapter, tx_ring);
+ pch_gbe_alloc_rx_buffers(adapter, rx_ring, rx_ring->count);
+ adapter->tx_queue_len = netdev->tx_queue_len;
+
+ mod_timer(&adapter->watchdog_timer, jiffies);
+
+ napi_enable(&adapter->napi);
+ pch_gbe_irq_enable(adapter);
+ netif_start_queue(adapter->netdev);
+
+ return 0;
+}
+
+/**
+ * pch_gbe_down - Down GbE network device
+ * @adapter: Board private structure
+ */
+void pch_gbe_down(struct pch_gbe_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+
+ /* signal that we're down so the interrupt handler does not
+ * reschedule our watchdog timer */
+ napi_disable(&adapter->napi);
+ atomic_set(&adapter->irq_sem, 0);
+
+ pch_gbe_irq_disable(adapter);
+ pch_gbe_free_irq(adapter);
+
+ del_timer_sync(&adapter->watchdog_timer);
+
+ netdev->tx_queue_len = adapter->tx_queue_len;
+ netif_carrier_off(netdev);
+ netif_stop_queue(netdev);
+
+ pch_gbe_reset(adapter);
+ pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
+ pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
+}
+
+/**
+ * pch_gbe_sw_init - Initialize general software structures (struct pch_gbe_adapter)
+ * @adapter: Board private structure to initialize
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+static int pch_gbe_sw_init(struct pch_gbe_adapter *adapter)
+{
+ struct pch_gbe_hw *hw = &adapter->hw;
+ struct net_device *netdev = adapter->netdev;
+
+ adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
+ hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
+ hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
+
+ /* Initialize the hardware-specific values */
+ if (pch_gbe_hal_setup_init_funcs(hw)) {
+ pr_err("Hardware Initialization Failure\n");
+ return -EIO;
+ }
+ if (pch_gbe_alloc_queues(adapter)) {
+ pr_err("Unable to allocate memory for queues\n");
+ return -ENOMEM;
+ }
+ spin_lock_init(&adapter->hw.miim_lock);
+ spin_lock_init(&adapter->tx_queue_lock);
+ spin_lock_init(&adapter->stats_lock);
+ spin_lock_init(&adapter->ethtool_lock);
+ atomic_set(&adapter->irq_sem, 0);
+ pch_gbe_irq_disable(adapter);
+
+ pch_gbe_init_stats(adapter);
+
+ pr_debug("rx_buffer_len : %d mac.min_frame_size : %d mac.max_frame_size : %d\n",
+ (u32) adapter->rx_buffer_len,
+ hw->mac.min_frame_size, hw->mac.max_frame_size);
+ return 0;
+}
+
+/**
+ * pch_gbe_open - Called when a network interface is made active
+ * @netdev: Network interface device structure
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+static int pch_gbe_open(struct net_device *netdev)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+ int err;
+
+ /* allocate transmit descriptors */
+ err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
+ if (err)
+ goto err_setup_tx;
+ /* allocate receive descriptors */
+ err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
+ if (err)
+ goto err_setup_rx;
+ pch_gbe_hal_power_up_phy(hw);
+ err = pch_gbe_up(adapter);
+ if (err)
+ goto err_up;
+ pr_debug("Success End\n");
+ return 0;
+
+err_up:
+ if (!adapter->wake_up_evt)
+ pch_gbe_hal_power_down_phy(hw);
+ pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
+err_setup_rx:
+ pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
+err_setup_tx:
+ pch_gbe_reset(adapter);
+ pr_err("Error End\n");
+ return err;
+}
+
+/**
+ * pch_gbe_stop - Disables a network interface
+ * @netdev: Network interface device structure
+ * Returns
+ * 0: Successfully
+ */
+static int pch_gbe_stop(struct net_device *netdev)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+
+ pch_gbe_down(adapter);
+ if (!adapter->wake_up_evt)
+ pch_gbe_hal_power_down_phy(hw);
+ pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
+ pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
+ return 0;
+}
+
+/**
+ * pch_gbe_xmit_frame - Packet transmitting start
+ * @skb: Socket buffer structure
+ * @netdev: Network interface device structure
+ * Returns
+ * - NETDEV_TX_OK: Normal end
+ * - NETDEV_TX_BUSY: Error end
+ */
+static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
+ unsigned long flags;
+
+ if (unlikely(skb->len > (adapter->hw.mac.max_frame_size - 4))) {
+ pr_err("Transfer length Error: skb len: %d > max: %d\n",
+ skb->len, adapter->hw.mac.max_frame_size);
+ dev_kfree_skb_any(skb);
+ adapter->stats.tx_length_errors++;
+ return NETDEV_TX_OK;
+ }
+ if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags)) {
+ /* Collision - tell upper layer to requeue */
+ return NETDEV_TX_LOCKED;
+ }
+ if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) {
+ netif_stop_queue(netdev);
+ spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
+ pr_debug("Return : BUSY next_to use : 0x%08x next_to clean : 0x%08x\n",
+ tx_ring->next_to_use, tx_ring->next_to_clean);
+ return NETDEV_TX_BUSY;
+ }
+ spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
+
+ /* CRC,ITAG no support */
+ pch_gbe_tx_queue(adapter, tx_ring, skb);
+ return NETDEV_TX_OK;
+}
+
+/**
+ * pch_gbe_get_stats - Get System Network Statistics
+ * @netdev: Network interface device structure
+ * Returns: The current stats
+ */
+static struct net_device_stats *pch_gbe_get_stats(struct net_device *netdev)
+{
+ /* only return the current stats */
+ return &netdev->stats;
+}
+
+/**
+ * pch_gbe_set_multi - Multicast and Promiscuous mode set
+ * @netdev: Network interface device structure
+ */
+static void pch_gbe_set_multi(struct net_device *netdev)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+ struct netdev_hw_addr *ha;
+ u8 *mta_list;
+ u32 rctl;
+ int i;
+ int mc_count;
+
+ pr_debug("netdev->flags : 0x%08x\n", netdev->flags);
+
+ /* Check for Promiscuous and All Multicast modes */
+ rctl = ioread32(&hw->reg->RX_MODE);
+ mc_count = netdev_mc_count(netdev);
+ if ((netdev->flags & IFF_PROMISC)) {
+ rctl &= ~PCH_GBE_ADD_FIL_EN;
+ rctl &= ~PCH_GBE_MLT_FIL_EN;
+ } else if ((netdev->flags & IFF_ALLMULTI)) {
+ /* all the multicasting receive permissions */
+ rctl |= PCH_GBE_ADD_FIL_EN;
+ rctl &= ~PCH_GBE_MLT_FIL_EN;
+ } else {
+ if (mc_count >= PCH_GBE_MAR_ENTRIES) {
+ /* all the multicasting receive permissions */
+ rctl |= PCH_GBE_ADD_FIL_EN;
+ rctl &= ~PCH_GBE_MLT_FIL_EN;
+ } else {
+ rctl |= (PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN);
+ }
+ }
+ iowrite32(rctl, &hw->reg->RX_MODE);
+
+ if (mc_count >= PCH_GBE_MAR_ENTRIES)
+ return;
+ mta_list = kmalloc(mc_count * ETH_ALEN, GFP_ATOMIC);
+ if (!mta_list)
+ return;
+
+ /* The shared function expects a packed array of only addresses. */
+ i = 0;
+ netdev_for_each_mc_addr(ha, netdev) {
+ if (i == mc_count)
+ break;
+ memcpy(mta_list + (i++ * ETH_ALEN), &ha->addr, ETH_ALEN);
+ }
+ pch_gbe_mac_mc_addr_list_update(hw, mta_list, i, 1,
+ PCH_GBE_MAR_ENTRIES);
+ kfree(mta_list);
+
+ pr_debug("RX_MODE reg(check bit31,30 ADD,MLT) : 0x%08x netdev->mc_count : 0x%08x\n",
+ ioread32(&hw->reg->RX_MODE), mc_count);
+}
+
+/**
+ * pch_gbe_set_mac - Change the Ethernet Address of the NIC
+ * @netdev: Network interface device structure
+ * @addr: Pointer to an address structure
+ * Returns
+ * 0: Successfully
+ * -EADDRNOTAVAIL: Failed
+ */
+static int pch_gbe_set_mac(struct net_device *netdev, void *addr)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct sockaddr *skaddr = addr;
+ int ret_val;
+
+ if (!is_valid_ether_addr(skaddr->sa_data)) {
+ ret_val = -EADDRNOTAVAIL;
+ } else {
+ memcpy(netdev->dev_addr, skaddr->sa_data, netdev->addr_len);
+ memcpy(adapter->hw.mac.addr, skaddr->sa_data, netdev->addr_len);
+ pch_gbe_mac_mar_set(&adapter->hw, adapter->hw.mac.addr, 0);
+ ret_val = 0;
+ }
+ pr_debug("ret_val : 0x%08x\n", ret_val);
+ pr_debug("dev_addr : %pM\n", netdev->dev_addr);
+ pr_debug("mac_addr : %pM\n", adapter->hw.mac.addr);
+ pr_debug("MAC_ADR1AB reg : 0x%08x 0x%08x\n",
+ ioread32(&adapter->hw.reg->mac_adr[0].high),
+ ioread32(&adapter->hw.reg->mac_adr[0].low));
+ return ret_val;
+}
+
+/**
+ * pch_gbe_change_mtu - Change the Maximum Transfer Unit
+ * @netdev: Network interface device structure
+ * @new_mtu: New value for maximum frame size
+ * Returns
+ * 0: Successfully
+ * -EINVAL: Failed
+ */
+static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ int max_frame;
+
+ max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
+ if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
+ (max_frame > PCH_GBE_MAX_JUMBO_FRAME_SIZE)) {
+ pr_err("Invalid MTU setting\n");
+ return -EINVAL;
+ }
+ if (max_frame <= PCH_GBE_FRAME_SIZE_2048)
+ adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
+ else if (max_frame <= PCH_GBE_FRAME_SIZE_4096)
+ adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_4096;
+ else if (max_frame <= PCH_GBE_FRAME_SIZE_8192)
+ adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_8192;
+ else
+ adapter->rx_buffer_len = PCH_GBE_MAX_JUMBO_FRAME_SIZE;
+ netdev->mtu = new_mtu;
+ adapter->hw.mac.max_frame_size = max_frame;
+
+ if (netif_running(netdev))
+ pch_gbe_reinit_locked(adapter);
+ else
+ pch_gbe_reset(adapter);
+
+ pr_debug("max_frame : %d rx_buffer_len : %d mtu : %d max_frame_size : %d\n",
+ max_frame, (u32) adapter->rx_buffer_len, netdev->mtu,
+ adapter->hw.mac.max_frame_size);
+ return 0;
+}
+
+/**
+ * pch_gbe_ioctl - Controls register through a MII interface
+ * @netdev: Network interface device structure
+ * @ifr: Pointer to ifr structure
+ * @cmd: Control command
+ * Returns
+ * 0: Successfully
+ * Negative value: Failed
+ */
+static int pch_gbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+ pr_debug("cmd : 0x%04x\n", cmd);
+
+ return generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
+}
+
+/**
+ * pch_gbe_tx_timeout - Respond to a Tx Hang
+ * @netdev: Network interface device structure
+ */
+static void pch_gbe_tx_timeout(struct net_device *netdev)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+ /* Do the reset outside of interrupt context */
+ adapter->stats.tx_timeout_count++;
+ schedule_work(&adapter->reset_task);
+}
+
+/**
+ * pch_gbe_napi_poll - NAPI receive and transfer polling callback
+ * @napi: Pointer of polling device struct
+ * @budget: The maximum number of a packet
+ * Returns
+ * false: Exit the polling mode
+ * true: Continue the polling mode
+ */
+static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
+{
+ struct pch_gbe_adapter *adapter =
+ container_of(napi, struct pch_gbe_adapter, napi);
+ struct net_device *netdev = adapter->netdev;
+ int work_done = 0;
+ bool poll_end_flag = false;
+ bool cleaned = false;
+
+ pr_debug("budget : %d\n", budget);
+
+ /* Keep link state information with original netdev */
+ if (!netif_carrier_ok(netdev)) {
+ poll_end_flag = true;
+ } else {
+ cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
+ pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
+
+ if (cleaned)
+ work_done = budget;
+ /* If no Tx and not enough Rx work done,
+ * exit the polling mode
+ */
+ if ((work_done < budget) || !netif_running(netdev))
+ poll_end_flag = true;
+ }
+
+ if (poll_end_flag) {
+ napi_complete(napi);
+ pch_gbe_irq_enable(adapter);
+ }
+
+ pr_debug("poll_end_flag : %d work_done : %d budget : %d\n",
+ poll_end_flag, work_done, budget);
+
+ return work_done;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/**
+ * pch_gbe_netpoll - Used by things like netconsole to send skbs
+ * @netdev: Network interface device structure
+ */
+static void pch_gbe_netpoll(struct net_device *netdev)
+{
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+ disable_irq(adapter->pdev->irq);
+ pch_gbe_intr(adapter->pdev->irq, netdev);
+ enable_irq(adapter->pdev->irq);
+}
+#endif
+
+static const struct net_device_ops pch_gbe_netdev_ops = {
+ .ndo_open = pch_gbe_open,
+ .ndo_stop = pch_gbe_stop,
+ .ndo_start_xmit = pch_gbe_xmit_frame,
+ .ndo_get_stats = pch_gbe_get_stats,
+ .ndo_set_mac_address = pch_gbe_set_mac,
+ .ndo_tx_timeout = pch_gbe_tx_timeout,
+ .ndo_change_mtu = pch_gbe_change_mtu,
+ .ndo_do_ioctl = pch_gbe_ioctl,
+ .ndo_set_multicast_list = &pch_gbe_set_multi,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = pch_gbe_netpoll,
+#endif
+};
+
+static pci_ers_result_t pch_gbe_io_error_detected(struct pci_dev *pdev,
+ pci_channel_state_t state)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+ netif_device_detach(netdev);
+ if (netif_running(netdev))
+ pch_gbe_down(adapter);
+ pci_disable_device(pdev);
+ /* Request a slot slot reset. */
+ return PCI_ERS_RESULT_NEED_RESET;
+}
+
+static pci_ers_result_t pch_gbe_io_slot_reset(struct pci_dev *pdev)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+
+ if (pci_enable_device(pdev)) {
+ pr_err("Cannot re-enable PCI device after reset\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+ pci_set_master(pdev);
+ pci_enable_wake(pdev, PCI_D0, 0);
+ pch_gbe_hal_power_up_phy(hw);
+ pch_gbe_reset(adapter);
+ /* Clear wake up status */
+ pch_gbe_mac_set_wol_event(hw, 0);
+
+ return PCI_ERS_RESULT_RECOVERED;
+}
+
+static void pch_gbe_io_resume(struct pci_dev *pdev)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+ if (netif_running(netdev)) {
+ if (pch_gbe_up(adapter)) {
+ pr_debug("can't bring device back up after reset\n");
+ return;
+ }
+ }
+ netif_device_attach(netdev);
+}
+
+static int __pch_gbe_suspend(struct pci_dev *pdev)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+ u32 wufc = adapter->wake_up_evt;
+ int retval = 0;
+
+ netif_device_detach(netdev);
+ if (netif_running(netdev))
+ pch_gbe_down(adapter);
+ if (wufc) {
+ pch_gbe_set_multi(netdev);
+ pch_gbe_setup_rctl(adapter);
+ pch_gbe_configure_rx(adapter);
+ pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
+ hw->mac.link_duplex);
+ pch_gbe_set_mode(adapter, hw->mac.link_speed,
+ hw->mac.link_duplex);
+ pch_gbe_mac_set_wol_event(hw, wufc);
+ pci_disable_device(pdev);
+ } else {
+ pch_gbe_hal_power_down_phy(hw);
+ pch_gbe_mac_set_wol_event(hw, wufc);
+ pci_disable_device(pdev);
+ }
+ return retval;
+}
+
+#ifdef CONFIG_PM
+static int pch_gbe_suspend(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+
+ return __pch_gbe_suspend(pdev);
+}
+
+static int pch_gbe_resume(struct device *device)
+{
+ struct pci_dev *pdev = to_pci_dev(device);
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+ struct pch_gbe_hw *hw = &adapter->hw;
+ u32 err;
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ pr_err("Cannot enable PCI device from suspend\n");
+ return err;
+ }
+ pci_set_master(pdev);
+ pch_gbe_hal_power_up_phy(hw);
+ pch_gbe_reset(adapter);
+ /* Clear wake on lan control and status */
+ pch_gbe_mac_set_wol_event(hw, 0);
+
+ if (netif_running(netdev))
+ pch_gbe_up(adapter);
+ netif_device_attach(netdev);
+
+ return 0;
+}
+#endif /* CONFIG_PM */
+
+static void pch_gbe_shutdown(struct pci_dev *pdev)
+{
+ __pch_gbe_suspend(pdev);
+ if (system_state == SYSTEM_POWER_OFF) {
+ pci_wake_from_d3(pdev, true);
+ pci_set_power_state(pdev, PCI_D3hot);
+ }
+}
+
+static void pch_gbe_remove(struct pci_dev *pdev)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+ flush_scheduled_work();
+ unregister_netdev(netdev);
+
+ pch_gbe_hal_phy_hw_reset(&adapter->hw);
+
+ kfree(adapter->tx_ring);
+ kfree(adapter->rx_ring);
+
+ iounmap(adapter->hw.reg);
+ pci_release_regions(pdev);
+ free_netdev(netdev);
+ pci_disable_device(pdev);
+}
+
+static int pch_gbe_probe(struct pci_dev *pdev,
+ const struct pci_device_id *pci_id)
+{
+ struct net_device *netdev;
+ struct pch_gbe_adapter *adapter;
+ int ret;
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ return ret;
+
+ if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
+ || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (ret) {
+ ret = pci_set_consistent_dma_mask(pdev,
+ DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(&pdev->dev, "ERR: No usable DMA "
+ "configuration, aborting\n");
+ goto err_disable_device;
+ }
+ }
+ }
+
+ ret = pci_request_regions(pdev, KBUILD_MODNAME);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "ERR: Can't reserve PCI I/O and memory resources\n");
+ goto err_disable_device;
+ }
+ pci_set_master(pdev);
+
+ netdev = alloc_etherdev((int)sizeof(struct pch_gbe_adapter));
+ if (!netdev) {
+ ret = -ENOMEM;
+ dev_err(&pdev->dev,
+ "ERR: Can't allocate and set up an Ethernet device\n");
+ goto err_release_pci;
+ }
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+
+ pci_set_drvdata(pdev, netdev);
+ adapter = netdev_priv(netdev);
+ adapter->netdev = netdev;
+ adapter->pdev = pdev;
+ adapter->hw.back = adapter;
+ adapter->hw.reg = pci_iomap(pdev, PCH_GBE_PCI_BAR, 0);
+ if (!adapter->hw.reg) {
+ ret = -EIO;
+ dev_err(&pdev->dev, "Can't ioremap\n");
+ goto err_free_netdev;
+ }
+
+ netdev->netdev_ops = &pch_gbe_netdev_ops;
+ netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
+ netif_napi_add(netdev, &adapter->napi,
+ pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
+ netdev->features = NETIF_F_HW_CSUM | NETIF_F_GRO;
+ pch_gbe_set_ethtool_ops(netdev);
+
+ pch_gbe_mac_reset_hw(&adapter->hw);
+
+ /* setup the private structure */
+ ret = pch_gbe_sw_init(adapter);
+ if (ret)
+ goto err_iounmap;
+
+ /* Initialize PHY */
+ ret = pch_gbe_init_phy(adapter);
+ if (ret) {
+ dev_err(&pdev->dev, "PHY initialize error\n");
+ goto err_free_adapter;
+ }
+ pch_gbe_hal_get_bus_info(&adapter->hw);
+
+ /* Read the MAC address. and store to the private data */
+ ret = pch_gbe_hal_read_mac_addr(&adapter->hw);
+ if (ret) {
+ dev_err(&pdev->dev, "MAC address Read Error\n");
+ goto err_free_adapter;
+ }
+
+ memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
+ if (!is_valid_ether_addr(netdev->dev_addr)) {
+ dev_err(&pdev->dev, "Invalid MAC Address\n");
+ ret = -EIO;
+ goto err_free_adapter;
+ }
+ setup_timer(&adapter->watchdog_timer, pch_gbe_watchdog,
+ (unsigned long)adapter);
+
+ INIT_WORK(&adapter->reset_task, pch_gbe_reset_task);
+
+ pch_gbe_check_options(adapter);
+
+ if (adapter->tx_csum)
+ netdev->features |= NETIF_F_HW_CSUM;
+ else
+ netdev->features &= ~NETIF_F_HW_CSUM;
+
+ /* initialize the wol settings based on the eeprom settings */
+ adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
+ dev_info(&pdev->dev, "MAC address : %pM\n", netdev->dev_addr);
+
+ /* reset the hardware with the new settings */
+ pch_gbe_reset(adapter);
+
+ ret = register_netdev(netdev);
+ if (ret)
+ goto err_free_adapter;
+ /* tell the stack to leave us alone until pch_gbe_open() is called */
+ netif_carrier_off(netdev);
+ netif_stop_queue(netdev);
+
+ dev_dbg(&pdev->dev, "OKIsemi(R) PCH Network Connection\n");
+
+ device_set_wakeup_enable(&pdev->dev, 1);
+ return 0;
+
+err_free_adapter:
+ pch_gbe_hal_phy_hw_reset(&adapter->hw);
+ kfree(adapter->tx_ring);
+ kfree(adapter->rx_ring);
+err_iounmap:
+ iounmap(adapter->hw.reg);
+err_free_netdev:
+ free_netdev(netdev);
+err_release_pci:
+ pci_release_regions(pdev);
+err_disable_device:
+ pci_disable_device(pdev);
+ return ret;
+}
+
+static DEFINE_PCI_DEVICE_TABLE(pch_gbe_pcidev_id) = {
+ {.vendor = PCI_VENDOR_ID_INTEL,
+ .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
+ .class_mask = (0xFFFF00)
+ },
+ /* required last entry */
+ {0}
+};
+
+#ifdef CONFIG_PM
+static const struct dev_pm_ops pch_gbe_pm_ops = {
+ .suspend = pch_gbe_suspend,
+ .resume = pch_gbe_resume,
+ .freeze = pch_gbe_suspend,
+ .thaw = pch_gbe_resume,
+ .poweroff = pch_gbe_suspend,
+ .restore = pch_gbe_resume,
+};
+#endif
+
+static struct pci_error_handlers pch_gbe_err_handler = {
+ .error_detected = pch_gbe_io_error_detected,
+ .slot_reset = pch_gbe_io_slot_reset,
+ .resume = pch_gbe_io_resume
+};
+
+static struct pci_driver pch_gbe_pcidev = {
+ .name = KBUILD_MODNAME,
+ .id_table = pch_gbe_pcidev_id,
+ .probe = pch_gbe_probe,
+ .remove = pch_gbe_remove,
+#ifdef CONFIG_PM_OPS
+ .driver.pm = &pch_gbe_pm_ops,
+#endif
+ .shutdown = pch_gbe_shutdown,
+ .err_handler = &pch_gbe_err_handler
+};
+
+
+static int __init pch_gbe_init_module(void)
+{
+ int ret;
+
+ ret = pci_register_driver(&pch_gbe_pcidev);
+ if (copybreak != PCH_GBE_COPYBREAK_DEFAULT) {
+ if (copybreak == 0) {
+ pr_info("copybreak disabled\n");
+ } else {
+ pr_info("copybreak enabled for packets <= %u bytes\n",
+ copybreak);
+ }
+ }
+ return ret;
+}
+
+static void __exit pch_gbe_exit_module(void)
+{
+ pci_unregister_driver(&pch_gbe_pcidev);
+}
+
+module_init(pch_gbe_init_module);
+module_exit(pch_gbe_exit_module);
+
+MODULE_DESCRIPTION("OKI semiconductor PCH Gigabit ethernet Driver");
+MODULE_AUTHOR("OKI semiconductor, <masa-korg@dsn.okisemi.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_DEVICE_TABLE(pci, pch_gbe_pcidev_id);
+
+module_param(copybreak, uint, 0644);
+MODULE_PARM_DESC(copybreak,
+ "Maximum size of packet that is copied to a new buffer on receive");
+
+/* pch_gbe_main.c */