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android-kvm / linux / 3a8254364277fabe01bc0e12b9691722939f5ef3 / . / drivers / net / pch_gbe / pch_gbe_main.c
blob: b8b4ba27b0e7cafb92270250b96b574bcf8c5bf4 [file] [log] [blame]
/*
* 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_DMA_PADDING 2
#define PCH_GBE_WATCHDOG_PERIOD (1 * HZ) /* watchdog time */
#define PCH_GBE_COPYBREAK_DEFAULT 256
#define PCH_GBE_PCI_BAR 1
#define PCH_GBE_RESERVE_MEMORY 0x200000 /* 2MB */
/* Macros for ML7223 */
#define PCI_VENDOR_ID_ROHM 0x10db
#define PCI_DEVICE_ID_ROHM_ML7223_GBE 0x8013
/* Macros for ML7831 */
#define PCI_DEVICE_ID_ROHM_ML7831_GBE 0x8802
#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 \
)
/* Ethertype field values */
#define PCH_GBE_MAX_RX_BUFFER_SIZE 0x2880
#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_RX_FIFO_ERR | \
PCH_GBE_INT_WOL_DET | \
PCH_GBE_INT_TX_CMPLT \
)
#define PCH_GBE_INT_DISABLE_ALL 0
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);
inline void pch_gbe_mac_load_mac_addr(struct pch_gbe_hw *hw)
{
iowrite32(0x01, &hw->reg->MAC_ADDR_LOAD);
}
/**
* 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_wait_clr_bit_irq - Wait to clear a bit for interrupt context
* @reg: Pointer of register
* @busy: Busy bit
*/
static int pch_gbe_wait_clr_bit_irq(void *reg, u32 bit)
{
u32 tmp;
int ret = -1;
/* wait busy */
tmp = 20;
while ((ioread32(reg) & bit) && --tmp)
udelay(5);
if (!tmp)
pr_err("Error: busy bit is not cleared\n");
else
ret = 0;
return ret;
}
/**
* 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;
}
static void pch_gbe_mac_reset_rx(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_RX_RST, &hw->reg->RESET);
pch_gbe_wait_clr_bit_irq(&hw->reg->RESET, PCH_GBE_RX_RST);
/* Setup the MAC 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);
rtnl_lock();
pch_gbe_reinit_locked(adapter);
rtnl_unlock();
}
/**
* pch_gbe_reinit_locked- Re-initialization
* @adapter: Board private structure
*/
void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
{
pch_gbe_down(adapter);
pch_gbe_up(adapter);
}
/**
* 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 net_device *netdev = adapter->netdev;
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);
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);
}
/**
* 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;
pr_debug("right now = %ld\n", jiffies);
pch_gbe_update_stats(adapter);
if ((mii_link_ok(&adapter->mii)) && (!netif_carrier_ok(netdev))) {
struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
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 = ethtool_cmd_speed(&cmd);
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",
hw->mac.link_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 (skb->ip_summed == CHECKSUM_NONE)
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 && skb->ip_summed != CHECKSUM_NONE) {
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 information --*/
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);
}
static void pch_gbe_stop_receive(struct pch_gbe_adapter *adapter)
{
struct pch_gbe_hw *hw = &adapter->hw;
u32 rxdma;
u16 value;
int ret;
/* Disable Receive DMA */
rxdma = ioread32(&hw->reg->DMA_CTRL);
rxdma &= ~PCH_GBE_RX_DMA_EN;
iowrite32(rxdma, &hw->reg->DMA_CTRL);
/* Wait Rx DMA BUS is IDLE */
ret = pch_gbe_wait_clr_bit_irq(&hw->reg->RX_DMA_ST, PCH_GBE_IDLE_CHECK);
if (ret) {
/* Disable Bus master */
pci_read_config_word(adapter->pdev, PCI_COMMAND, &value);
value &= ~PCI_COMMAND_MASTER;
pci_write_config_word(adapter->pdev, PCI_COMMAND, value);
/* Stop Receive */
pch_gbe_mac_reset_rx(hw);
/* Enable Bus master */
value |= PCI_COMMAND_MASTER;
pci_write_config_word(adapter->pdev, PCI_COMMAND, value);
} else {
/* Stop Receive */
pch_gbe_mac_reset_rx(hw);
}
}
static void pch_gbe_start_receive(struct pch_gbe_hw *hw)
{
u32 rxdma;
/* 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);
return;
}
/**
* 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)
if (!adapter->rx_stop_flag) {
adapter->stats.intr_rx_fifo_err_count++;
pr_debug("Rx fifo over run\n");
adapter->rx_stop_flag = true;
int_en = ioread32(&hw->reg->INT_EN);
iowrite32((int_en & ~PCH_GBE_INT_RX_FIFO_ERR),
&hw->reg->INT_EN);
pch_gbe_stop_receive(adapter);
int_st |= ioread32(&hw->reg->INT_ST);
int_st = int_st & ioread32(&hw->reg->INT_EN);
}
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_debug("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);
}
}
/* When request status is Receive interruption */
if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT)) ||
(adapter->rx_stop_flag == true)) {
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 + NET_IP_ALIGN;
i = rx_ring->next_to_use;
while ((cleaned_count--)) {
buffer_info = &rx_ring->buffer_info[i];
skb = netdev_alloc_skb(netdev, bufsz);
if (unlikely(!skb)) {
/* Better luck next round */
adapter->stats.rx_alloc_buff_failed++;
break;
}
/* align */
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
buffer_info->dma = dma_map_single(&pdev->dev,
buffer_info->rx_buffer,
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;
}
static int
pch_gbe_alloc_rx_buffers_pool(struct pch_gbe_adapter *adapter,
struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
{
struct pci_dev *pdev = adapter->pdev;
struct pch_gbe_buffer *buffer_info;
unsigned int i;
unsigned int bufsz;
unsigned int size;
bufsz = adapter->rx_buffer_len;
size = rx_ring->count * bufsz + PCH_GBE_RESERVE_MEMORY;
rx_ring->rx_buff_pool = dma_alloc_coherent(&pdev->dev, size,
&rx_ring->rx_buff_pool_logic,
GFP_KERNEL);
if (!rx_ring->rx_buff_pool) {
pr_err("Unable to allocate memory for the receive poll buffer\n");
return -ENOMEM;
}
memset(rx_ring->rx_buff_pool, 0, size);
rx_ring->rx_buff_pool_size = size;
for (i = 0; i < rx_ring->count; i++) {
buffer_info = &rx_ring->buffer_info[i];
buffer_info->rx_buffer = rx_ring->rx_buff_pool + bufsz * i;
buffer_info->length = bufsz;
}
return 0;
}
/**
* 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 = true;
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);
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) {
cleaned = false;
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 int i;
unsigned int cleaned_count = 0;
bool cleaned = false;
struct sk_buff *skb;
u8 dma_status;
u16 gbec_status;
u32 tcp_ip_status;
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;
buffer_info->skb = NULL;
/* unmap dma */
dma_unmap_single(&pdev->dev, buffer_info->dma,
buffer_info->length, DMA_FROM_DEVICE);
buffer_info->mapped = false;
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], length includes FCS length */
length = (rx_desc->rx_words_eob) - 3 - ETH_FCS_LEN;
if (rx_desc->rx_words_eob & 0x02)
length = length - 4;
/*
* buffer_info->rx_buffer: [Header:14][payload]
* skb->data: [Reserve:2][Header:14][payload]
*/
memcpy(skb->data, buffer_info->rx_buffer, length);
/* 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)
skb->ip_summed = CHECKSUM_NONE;
else
skb->ip_summed = CHECKSUM_UNNECESSARY;
napi_gro_receive(&adapter->napi, skb);
(*work_done)++;
pr_debug("Receive skb->ip_summed: %d length: %d\n",
skb->ip_summed, length);
}
/* 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 = vzalloc(size);
if (!tx_ring->buffer_info) {
pr_err("Unable to allocate memory for the buffer information\n");
return -ENOMEM;
}
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 = vzalloc(size);
if (!rx_ring->buffer_info) {
pr_err("Unable to allocate memory for the receive descriptor ring\n");
return -ENOMEM;
}
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;
}
err = pch_gbe_alloc_rx_buffers_pool(adapter, rx_ring, rx_ring->count);
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;
pch_gbe_start_receive(&adapter->hw);
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;
struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
/* 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);
pci_free_consistent(adapter->pdev, rx_ring->rx_buff_pool_size,
rx_ring->rx_buff_pool, rx_ring->rx_buff_pool_logic);
rx_ring->rx_buff_pool_logic = 0;
rx_ring->rx_buff_pool_size = 0;
rx_ring->rx_buff_pool = NULL;
}
/**
* 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;
unsigned long old_rx_buffer_len = adapter->rx_buffer_len;
int err;
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_RX_BUFFER_SIZE;
if (netif_running(netdev)) {
pch_gbe_down(adapter);
err = pch_gbe_up(adapter);
if (err) {
adapter->rx_buffer_len = old_rx_buffer_len;
pch_gbe_up(adapter);
return -ENOMEM;
} else {
netdev->mtu = new_mtu;
adapter->hw.mac.max_frame_size = max_frame;
}
} else {
pch_gbe_reset(adapter);
netdev->mtu = new_mtu;
adapter->hw.mac.max_frame_size = max_frame;
}
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_set_features - Reset device after features changed
* @netdev: Network interface device structure
* @features: New features
* Returns
* 0: HW state updated successfully
*/
static int pch_gbe_set_features(struct net_device *netdev, u32 features)
{
struct pch_gbe_adapter *adapter = netdev_priv(netdev);
u32 changed = features ^ netdev->features;
if (!(changed & NETIF_F_RXCSUM))
return 0;
if (netif_running(netdev))
pch_gbe_reinit_locked(adapter);
else
pch_gbe_reset(adapter);
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);
int work_done = 0;
bool poll_end_flag = false;
bool cleaned = false;
u32 int_en;
pr_debug("budget : %d\n", budget);
pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
if (!cleaned)
work_done = budget;
/* If no Tx and not enough Rx work done,
* exit the polling mode
*/
if (work_done < budget)
poll_end_flag = true;
if (poll_end_flag) {
napi_complete(napi);
if (adapter->rx_stop_flag) {
adapter->rx_stop_flag = false;
pch_gbe_start_receive(&adapter->hw);
}
pch_gbe_irq_enable(adapter);
} else
if (adapter->rx_stop_flag) {
adapter->rx_stop_flag = false;
pch_gbe_start_receive(&adapter->hw);
int_en = ioread32(&adapter->hw.reg->INT_EN);
iowrite32((int_en | PCH_GBE_INT_RX_FIFO_ERR),
&adapter->hw.reg->INT_EN);
}
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_set_features = pch_gbe_set_features,
.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);
cancel_work_sync(&adapter->reset_task);
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->hw_features = NETIF_F_RXCSUM |
NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
netdev->features = netdev->hw_features;
pch_gbe_set_ethtool_ops(netdev);
pch_gbe_mac_load_mac_addr(&adapter->hw);
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);
/* 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)
},
{.vendor = PCI_VENDOR_ID_ROHM,
.device = PCI_DEVICE_ID_ROHM_ML7223_GBE,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.class = (PCI_CLASS_NETWORK_ETHERNET << 8),
.class_mask = (0xFFFF00)
},
{.vendor = PCI_VENDOR_ID_ROHM,
.device = PCI_DEVICE_ID_ROHM_ML7831_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_driver = {
.name = KBUILD_MODNAME,
.id_table = pch_gbe_pcidev_id,
.probe = pch_gbe_probe,
.remove = pch_gbe_remove,
#ifdef CONFIG_PM
.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_driver);
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_driver);
}
module_init(pch_gbe_init_module);
module_exit(pch_gbe_exit_module);
MODULE_DESCRIPTION("EG20T PCH Gigabit ethernet Driver");
MODULE_AUTHOR("OKI SEMICONDUCTOR, <toshiharu-linux@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 */