renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-28 07:04:00 +08:00
Code
e6e7e9cd8e
linux-next/drivers/net/ethernet/microchip/lan743x_main.c
Colin Ian King c16b1a9ccf lan743x: make functions lan743x_csr_read and lan743x_csr_read static 
Functions lan743x_csr_read and lan743x_csr_read are local to the source
and do not need to be in global scope, so make them static.

Cleans up sparse warning:
drivers/net/ethernet/microchip/lan743x_main.c:56:5: warning: symbol
lan743x_csr_read' was not declared. Should it be static?
drivers/net/ethernet/microchip/lan743x_main.c:61:6: warning: symbol
'lan743x_csr_write' was not declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-12 11:12:38 -04:00

2772 lines
75 KiB
C
Raw Blame History

/* SPDX-License-Identifier: GPL-2.0+ */
/* Copyright (C) 2018 Microchip Technology Inc. */
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/crc32.h>
#include <linux/microchipphy.h>
#include <linux/net_tstamp.h>
#include <linux/phy.h>
#include <linux/rtnetlink.h>
#include <linux/iopoll.h>
#include "lan743x_main.h"
static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
{
pci_release_selected_regions(adapter->pdev,
pci_select_bars(adapter->pdev,
IORESOURCE_MEM));
pci_disable_device(adapter->pdev);
}
static int lan743x_pci_init(struct lan743x_adapter *adapter,
struct pci_dev *pdev)
{
unsigned long bars = 0;
int ret;
adapter->pdev = pdev;
ret = pci_enable_device_mem(pdev);
if (ret)
goto return_error;
netif_info(adapter, probe, adapter->netdev,
"PCI: Vendor ID = 0x%04X, Device ID = 0x%04X\n",
pdev->vendor, pdev->device);
bars = pci_select_bars(pdev, IORESOURCE_MEM);
if (!test_bit(0, &bars))
goto disable_device;
ret = pci_request_selected_regions(pdev, bars, DRIVER_NAME);
if (ret)
goto disable_device;
pci_set_master(pdev);
return 0;
disable_device:
pci_disable_device(adapter->pdev);
return_error:
return ret;
}
static u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
{
return ioread32(&adapter->csr.csr_address[offset]);
}
static void lan743x_csr_write(struct lan743x_adapter *adapter, int offset,
u32 data)
{
iowrite32(data, &adapter->csr.csr_address[offset]);
}
#define LAN743X_CSR_READ_OP(offset) lan743x_csr_read(adapter, offset)
static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
{
u32 data;
data = lan743x_csr_read(adapter, HW_CFG);
data |= HW_CFG_LRST_;
lan743x_csr_write(adapter, HW_CFG, data);
return readx_poll_timeout(LAN743X_CSR_READ_OP, HW_CFG, data,
!(data & HW_CFG_LRST_), 100000, 10000000);
}
static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
int offset, u32 bit_mask,
int target_value, int usleep_min,
int usleep_max, int count)
{
u32 data;
return readx_poll_timeout(LAN743X_CSR_READ_OP, offset, data,
target_value == ((data & bit_mask) ? 1 : 0),
usleep_max, usleep_min * count);
}
static int lan743x_csr_init(struct lan743x_adapter *adapter)
{
struct lan743x_csr *csr = &adapter->csr;
resource_size_t bar_start, bar_length;
int result;
bar_start = pci_resource_start(adapter->pdev, 0);
bar_length = pci_resource_len(adapter->pdev, 0);
csr->csr_address = devm_ioremap(&adapter->pdev->dev,
bar_start, bar_length);
if (!csr->csr_address) {
result = -ENOMEM;
goto clean_up;
}
csr->id_rev = lan743x_csr_read(adapter, ID_REV);
csr->fpga_rev = lan743x_csr_read(adapter, FPGA_REV);
netif_info(adapter, probe, adapter->netdev,
"ID_REV = 0x%08X, FPGA_REV = %d.%d\n",
csr->id_rev, FPGA_REV_GET_MAJOR_(csr->fpga_rev),
FPGA_REV_GET_MINOR_(csr->fpga_rev));
if (!ID_REV_IS_VALID_CHIP_ID_(csr->id_rev)) {
result = -ENODEV;
goto clean_up;
}
csr->flags = LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
switch (csr->id_rev & ID_REV_CHIP_REV_MASK_) {
case ID_REV_CHIP_REV_A0_:
csr->flags |= LAN743X_CSR_FLAG_IS_A0;
csr->flags &= ~LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR;
break;
case ID_REV_CHIP_REV_B0_:
csr->flags |= LAN743X_CSR_FLAG_IS_B0;
break;
}
result = lan743x_csr_light_reset(adapter);
if (result)
goto clean_up;
return 0;
clean_up:
return result;
}
static void lan743x_intr_software_isr(void *context)
{
struct lan743x_adapter *adapter = context;
struct lan743x_intr *intr = &adapter->intr;
u32 int_sts;
int_sts = lan743x_csr_read(adapter, INT_STS);
if (int_sts & INT_BIT_SW_GP_) {
lan743x_csr_write(adapter, INT_STS, INT_BIT_SW_GP_);
intr->software_isr_flag = 1;
}
}
static void lan743x_tx_isr(void *context, u32 int_sts, u32 flags)
{
struct lan743x_tx *tx = context;
struct lan743x_adapter *adapter = tx->adapter;
bool enable_flag = true;
u32 int_en = 0;
int_en = lan743x_csr_read(adapter, INT_EN_SET);
if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
lan743x_csr_write(adapter, INT_EN_CLR,
INT_BIT_DMA_TX_(tx->channel_number));
}
if (int_sts & INT_BIT_DMA_TX_(tx->channel_number)) {
u32 ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
u32 dmac_int_sts;
u32 dmac_int_en;
if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
else
dmac_int_sts = ioc_bit;
if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
dmac_int_en = lan743x_csr_read(adapter,
DMAC_INT_EN_SET);
else
dmac_int_en = ioc_bit;
dmac_int_en &= ioc_bit;
dmac_int_sts &= dmac_int_en;
if (dmac_int_sts & ioc_bit) {
napi_schedule(&tx->napi);
enable_flag = false;/* poll func will enable later */
}
}
if (enable_flag)
/* enable isr */
lan743x_csr_write(adapter, INT_EN_SET,
INT_BIT_DMA_TX_(tx->channel_number));
}
static void lan743x_rx_isr(void *context, u32 int_sts, u32 flags)
{
struct lan743x_rx *rx = context;
struct lan743x_adapter *adapter = rx->adapter;
bool enable_flag = true;
if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR) {
lan743x_csr_write(adapter, INT_EN_CLR,
INT_BIT_DMA_RX_(rx->channel_number));
}
if (int_sts & INT_BIT_DMA_RX_(rx->channel_number)) {
u32 rx_frame_bit = DMAC_INT_BIT_RXFRM_(rx->channel_number);
u32 dmac_int_sts;
u32 dmac_int_en;
if (flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ)
dmac_int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
else
dmac_int_sts = rx_frame_bit;
if (flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK)
dmac_int_en = lan743x_csr_read(adapter,
DMAC_INT_EN_SET);
else
dmac_int_en = rx_frame_bit;
dmac_int_en &= rx_frame_bit;
dmac_int_sts &= dmac_int_en;
if (dmac_int_sts & rx_frame_bit) {
napi_schedule(&rx->napi);
enable_flag = false;/* poll funct will enable later */
}
}
if (enable_flag) {
/* enable isr */
lan743x_csr_write(adapter, INT_EN_SET,
INT_BIT_DMA_RX_(rx->channel_number));
}
}
static void lan743x_intr_shared_isr(void *context, u32 int_sts, u32 flags)
{
struct lan743x_adapter *adapter = context;
unsigned int channel;
if (int_sts & INT_BIT_ALL_RX_) {
for (channel = 0; channel < LAN743X_USED_RX_CHANNELS;
channel++) {
u32 int_bit = INT_BIT_DMA_RX_(channel);
if (int_sts & int_bit) {
lan743x_rx_isr(&adapter->rx[channel],
int_bit, flags);
int_sts &= ~int_bit;
}
}
}
if (int_sts & INT_BIT_ALL_TX_) {
for (channel = 0; channel < LAN743X_USED_TX_CHANNELS;
channel++) {
u32 int_bit = INT_BIT_DMA_TX_(channel);
if (int_sts & int_bit) {
lan743x_tx_isr(&adapter->tx[channel],
int_bit, flags);
int_sts &= ~int_bit;
}
}
}
if (int_sts & INT_BIT_ALL_OTHER_) {
if (int_sts & INT_BIT_SW_GP_) {
lan743x_intr_software_isr(adapter);
int_sts &= ~INT_BIT_SW_GP_;
}
}
if (int_sts)
lan743x_csr_write(adapter, INT_EN_CLR, int_sts);
}
static irqreturn_t lan743x_intr_entry_isr(int irq, void *ptr)
{
struct lan743x_vector *vector = ptr;
struct lan743x_adapter *adapter = vector->adapter;
irqreturn_t result = IRQ_NONE;
u32 int_enables;
u32 int_sts;
if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ) {
int_sts = lan743x_csr_read(adapter, INT_STS);
} else if (vector->flags &
(LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)) {
int_sts = lan743x_csr_read(adapter, INT_STS_R2C);
} else {
/* use mask as implied status */
int_sts = vector->int_mask | INT_BIT_MAS_;
}
if (!(int_sts & INT_BIT_MAS_))
goto irq_done;
if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR)
/* disable vector interrupt */
lan743x_csr_write(adapter,
INT_VEC_EN_CLR,
INT_VEC_EN_(vector->vector_index));
if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR)
/* disable master interrupt */
lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
if (vector->flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK) {
int_enables = lan743x_csr_read(adapter, INT_EN_SET);
} else {
/* use vector mask as implied enable mask */
int_enables = vector->int_mask;
}
int_sts &= int_enables;
int_sts &= vector->int_mask;
if (int_sts) {
if (vector->handler) {
vector->handler(vector->context,
int_sts, vector->flags);
} else {
/* disable interrupts on this vector */
lan743x_csr_write(adapter, INT_EN_CLR,
vector->int_mask);
}
result = IRQ_HANDLED;
}
if (vector->flags & LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET)
/* enable master interrupt */
lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
if (vector->flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET)
/* enable vector interrupt */
lan743x_csr_write(adapter,
INT_VEC_EN_SET,
INT_VEC_EN_(vector->vector_index));
irq_done:
return result;
}
static int lan743x_intr_test_isr(struct lan743x_adapter *adapter)
{
struct lan743x_intr *intr = &adapter->intr;
int result = -ENODEV;
int timeout = 10;
intr->software_isr_flag = 0;
/* enable interrupt */
lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_SW_GP_);
/* activate interrupt here */
lan743x_csr_write(adapter, INT_SET, INT_BIT_SW_GP_);
while ((timeout > 0) && (!(intr->software_isr_flag))) {
usleep_range(1000, 20000);
timeout--;
}
if (intr->software_isr_flag)
result = 0;
/* disable interrupts */
lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_SW_GP_);
return result;
}
static int lan743x_intr_register_isr(struct lan743x_adapter *adapter,
int vector_index, u32 flags,
u32 int_mask,
lan743x_vector_handler handler,
void *context)
{
struct lan743x_vector *vector = &adapter->intr.vector_list
[vector_index];
int ret;
vector->adapter = adapter;
vector->flags = flags;
vector->vector_index = vector_index;
vector->int_mask = int_mask;
vector->handler = handler;
vector->context = context;
ret = request_irq(vector->irq,
lan743x_intr_entry_isr,
(flags & LAN743X_VECTOR_FLAG_IRQ_SHARED) ?
IRQF_SHARED : 0, DRIVER_NAME, vector);
if (ret) {
vector->handler = NULL;
vector->context = NULL;
vector->int_mask = 0;
vector->flags = 0;
}
return ret;
}
static void lan743x_intr_unregister_isr(struct lan743x_adapter *adapter,
int vector_index)
{
struct lan743x_vector *vector = &adapter->intr.vector_list
[vector_index];
free_irq(vector->irq, vector);
vector->handler = NULL;
vector->context = NULL;
vector->int_mask = 0;
vector->flags = 0;
}
static u32 lan743x_intr_get_vector_flags(struct lan743x_adapter *adapter,
u32 int_mask)
{
int index;
for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
if (adapter->intr.vector_list[index].int_mask & int_mask)
return adapter->intr.vector_list[index].flags;
}
return 0;
}
static void lan743x_intr_close(struct lan743x_adapter *adapter)
{
struct lan743x_intr *intr = &adapter->intr;
int index = 0;
lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_MAS_);
lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0x000000FF);
for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++) {
if (intr->flags & INTR_FLAG_IRQ_REQUESTED(index)) {
lan743x_intr_unregister_isr(adapter, index);
intr->flags &= ~INTR_FLAG_IRQ_REQUESTED(index);
}
}
if (intr->flags & INTR_FLAG_MSI_ENABLED) {
pci_disable_msi(adapter->pdev);
intr->flags &= ~INTR_FLAG_MSI_ENABLED;
}
if (intr->flags & INTR_FLAG_MSIX_ENABLED) {
pci_disable_msix(adapter->pdev);
intr->flags &= ~INTR_FLAG_MSIX_ENABLED;
}
}
static int lan743x_intr_open(struct lan743x_adapter *adapter)
{
struct msix_entry msix_entries[LAN743X_MAX_VECTOR_COUNT];
struct lan743x_intr *intr = &adapter->intr;
u32 int_vec_en_auto_clr = 0;
u32 int_vec_map0 = 0;
u32 int_vec_map1 = 0;
int ret = -ENODEV;
int index = 0;
u32 flags = 0;
intr->number_of_vectors = 0;
/* Try to set up MSIX interrupts */
memset(&msix_entries[0], 0,
sizeof(struct msix_entry) * LAN743X_MAX_VECTOR_COUNT);
for (index = 0; index < LAN743X_MAX_VECTOR_COUNT; index++)
msix_entries[index].entry = index;
ret = pci_enable_msix_range(adapter->pdev,
msix_entries, 1,
1 + LAN743X_USED_TX_CHANNELS +
LAN743X_USED_RX_CHANNELS);
if (ret > 0) {
intr->flags |= INTR_FLAG_MSIX_ENABLED;
intr->number_of_vectors = ret;
intr->using_vectors = true;
for (index = 0; index < intr->number_of_vectors; index++)
intr->vector_list[index].irq = msix_entries
[index].vector;
netif_info(adapter, ifup, adapter->netdev,
"using MSIX interrupts, number of vectors = %d\n",
intr->number_of_vectors);
}
/* If MSIX failed try to setup using MSI interrupts */
if (!intr->number_of_vectors) {
if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
if (!pci_enable_msi(adapter->pdev)) {
intr->flags |= INTR_FLAG_MSI_ENABLED;
intr->number_of_vectors = 1;
intr->using_vectors = true;
intr->vector_list[0].irq =
adapter->pdev->irq;
netif_info(adapter, ifup, adapter->netdev,
"using MSI interrupts, number of vectors = %d\n",
intr->number_of_vectors);
}
}
}
/* If MSIX, and MSI failed, setup using legacy interrupt */
if (!intr->number_of_vectors) {
intr->number_of_vectors = 1;
intr->using_vectors = false;
intr->vector_list[0].irq = intr->irq;
netif_info(adapter, ifup, adapter->netdev,
"using legacy interrupts\n");
}
/* At this point we must have at least one irq */
lan743x_csr_write(adapter, INT_VEC_EN_CLR, 0xFFFFFFFF);
/* map all interrupts to vector 0 */
lan743x_csr_write(adapter, INT_VEC_MAP0, 0x00000000);
lan743x_csr_write(adapter, INT_VEC_MAP1, 0x00000000);
lan743x_csr_write(adapter, INT_VEC_MAP2, 0x00000000);
flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
if (intr->using_vectors) {
flags |= LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
} else {
flags |= LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR |
LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET |
LAN743X_VECTOR_FLAG_IRQ_SHARED;
}
if (adapter->csr.flags & LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ;
flags &= ~LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C;
flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR;
flags &= ~LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK;
flags |= LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C;
flags |= LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C;
}
ret = lan743x_intr_register_isr(adapter, 0, flags,
INT_BIT_ALL_RX_ | INT_BIT_ALL_TX_ |
INT_BIT_ALL_OTHER_,
lan743x_intr_shared_isr, adapter);
if (ret)
goto clean_up;
intr->flags |= INTR_FLAG_IRQ_REQUESTED(0);
if (intr->using_vectors)
lan743x_csr_write(adapter, INT_VEC_EN_SET,
INT_VEC_EN_(0));
if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
lan743x_csr_write(adapter, INT_MOD_CFG0, LAN743X_INT_MOD);
lan743x_csr_write(adapter, INT_MOD_CFG1, LAN743X_INT_MOD);
lan743x_csr_write(adapter, INT_MOD_CFG2, LAN743X_INT_MOD);
lan743x_csr_write(adapter, INT_MOD_CFG3, LAN743X_INT_MOD);
lan743x_csr_write(adapter, INT_MOD_CFG4, LAN743X_INT_MOD);
lan743x_csr_write(adapter, INT_MOD_CFG5, LAN743X_INT_MOD);
lan743x_csr_write(adapter, INT_MOD_CFG6, LAN743X_INT_MOD);
lan743x_csr_write(adapter, INT_MOD_CFG7, LAN743X_INT_MOD);
lan743x_csr_write(adapter, INT_MOD_MAP0, 0x00005432);
lan743x_csr_write(adapter, INT_MOD_MAP1, 0x00000001);
lan743x_csr_write(adapter, INT_MOD_MAP2, 0x00FFFFFF);
}
/* enable interrupts */
lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_MAS_);
ret = lan743x_intr_test_isr(adapter);
if (ret)
goto clean_up;
if (intr->number_of_vectors > 1) {
int number_of_tx_vectors = intr->number_of_vectors - 1;
if (number_of_tx_vectors > LAN743X_USED_TX_CHANNELS)
number_of_tx_vectors = LAN743X_USED_TX_CHANNELS;
flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
if (adapter->csr.flags &
LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
}
for (index = 0; index < number_of_tx_vectors; index++) {
u32 int_bit = INT_BIT_DMA_TX_(index);
int vector = index + 1;
/* map TX interrupt to vector */
int_vec_map1 |= INT_VEC_MAP1_TX_VEC_(index, vector);
lan743x_csr_write(adapter, INT_VEC_MAP1, int_vec_map1);
if (flags &
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
int_vec_en_auto_clr |= INT_VEC_EN_(vector);
lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
int_vec_en_auto_clr);
}
/* Remove TX interrupt from shared mask */
intr->vector_list[0].int_mask &= ~int_bit;
ret = lan743x_intr_register_isr(adapter, vector, flags,
int_bit, lan743x_tx_isr,
&adapter->tx[index]);
if (ret)
goto clean_up;
intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
if (!(flags &
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET))
lan743x_csr_write(adapter, INT_VEC_EN_SET,
INT_VEC_EN_(vector));
}
}
if ((intr->number_of_vectors - LAN743X_USED_TX_CHANNELS) > 1) {
int number_of_rx_vectors = intr->number_of_vectors -
LAN743X_USED_TX_CHANNELS - 1;
if (number_of_rx_vectors > LAN743X_USED_RX_CHANNELS)
number_of_rx_vectors = LAN743X_USED_RX_CHANNELS;
flags = LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ |
LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR |
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR |
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET;
if (adapter->csr.flags &
LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR) {
flags = LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR |
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET |
LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR |
LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR;
}
for (index = 0; index < number_of_rx_vectors; index++) {
int vector = index + 1 + LAN743X_USED_TX_CHANNELS;
u32 int_bit = INT_BIT_DMA_RX_(index);
/* map RX interrupt to vector */
int_vec_map0 |= INT_VEC_MAP0_RX_VEC_(index, vector);
lan743x_csr_write(adapter, INT_VEC_MAP0, int_vec_map0);
if (flags &
LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR) {
int_vec_en_auto_clr |= INT_VEC_EN_(vector);
lan743x_csr_write(adapter, INT_VEC_EN_AUTO_CLR,
int_vec_en_auto_clr);
}
/* Remove RX interrupt from shared mask */
intr->vector_list[0].int_mask &= ~int_bit;
ret = lan743x_intr_register_isr(adapter, vector, flags,
int_bit, lan743x_rx_isr,
&adapter->rx[index]);
if (ret)
goto clean_up;
intr->flags |= INTR_FLAG_IRQ_REQUESTED(vector);
lan743x_csr_write(adapter, INT_VEC_EN_SET,
INT_VEC_EN_(vector));
}
}
return 0;
clean_up:
lan743x_intr_close(adapter);
return ret;
}
static int lan743x_dp_write(struct lan743x_adapter *adapter,
u32 select, u32 addr, u32 length, u32 *buf)
{
int ret = -EIO;
u32 dp_sel;
int i;
mutex_lock(&adapter->dp_lock);
if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
1, 40, 100, 100))
goto unlock;
dp_sel = lan743x_csr_read(adapter, DP_SEL);
dp_sel &= ~DP_SEL_MASK_;
dp_sel |= select;
lan743x_csr_write(adapter, DP_SEL, dp_sel);
for (i = 0; i < length; i++) {
lan743x_csr_write(adapter, DP_ADDR, addr + i);
lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
1, 40, 100, 100))
goto unlock;
}
ret = 0;
unlock:
mutex_unlock(&adapter->dp_lock);
return ret;
}
static u32 lan743x_mac_mii_access(u16 id, u16 index, int read)
{
u32 ret;
ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) &
MAC_MII_ACC_PHY_ADDR_MASK_;
ret |= (index << MAC_MII_ACC_MIIRINDA_SHIFT_) &
MAC_MII_ACC_MIIRINDA_MASK_;
if (read)
ret |= MAC_MII_ACC_MII_READ_;
else
ret |= MAC_MII_ACC_MII_WRITE_;
ret |= MAC_MII_ACC_MII_BUSY_;
return ret;
}
static int lan743x_mac_mii_wait_till_not_busy(struct lan743x_adapter *adapter)
{
u32 data;
return readx_poll_timeout(LAN743X_CSR_READ_OP, MAC_MII_ACC, data,
!(data & MAC_MII_ACC_MII_BUSY_), 0, 1000000);
}
static int lan743x_mdiobus_read(struct mii_bus *bus, int phy_id, int index)
{
struct lan743x_adapter *adapter = bus->priv;
u32 val, mii_access;
int ret;
/* comfirm MII not busy */
ret = lan743x_mac_mii_wait_till_not_busy(adapter);
if (ret < 0)
return ret;
/* set the address, index & direction (read from PHY) */
mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_READ);
lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
ret = lan743x_mac_mii_wait_till_not_busy(adapter);
if (ret < 0)
return ret;
val = lan743x_csr_read(adapter, MAC_MII_DATA);
return (int)(val & 0xFFFF);
}
static int lan743x_mdiobus_write(struct mii_bus *bus,
int phy_id, int index, u16 regval)
{
struct lan743x_adapter *adapter = bus->priv;
u32 val, mii_access;
int ret;
/* confirm MII not busy */
ret = lan743x_mac_mii_wait_till_not_busy(adapter);
if (ret < 0)
return ret;
val = (u32)regval;
lan743x_csr_write(adapter, MAC_MII_DATA, val);
/* set the address, index & direction (write to PHY) */
mii_access = lan743x_mac_mii_access(phy_id, index, MAC_MII_WRITE);
lan743x_csr_write(adapter, MAC_MII_ACC, mii_access);
ret = lan743x_mac_mii_wait_till_not_busy(adapter);
return ret;
}
static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
u8 *addr)
{
u32 addr_lo, addr_hi;
addr_lo = addr[0] |
addr[1] << 8 |
addr[2] << 16 |
addr[3] << 24;
addr_hi = addr[4] |
addr[5] << 8;
lan743x_csr_write(adapter, MAC_RX_ADDRL, addr_lo);
lan743x_csr_write(adapter, MAC_RX_ADDRH, addr_hi);
ether_addr_copy(adapter->mac_address, addr);
netif_info(adapter, drv, adapter->netdev,
"MAC address set to %pM\n", addr);
}
static int lan743x_mac_init(struct lan743x_adapter *adapter)
{
bool mac_address_valid = true;
struct net_device *netdev;
u32 mac_addr_hi = 0;
u32 mac_addr_lo = 0;
u32 data;
int ret;
netdev = adapter->netdev;
lan743x_csr_write(adapter, MAC_CR, MAC_CR_RST_);
ret = lan743x_csr_wait_for_bit(adapter, MAC_CR, MAC_CR_RST_,
0, 1000, 20000, 100);
if (ret)
return ret;
/* setup auto duplex, and speed detection */
data = lan743x_csr_read(adapter, MAC_CR);
data |= MAC_CR_ADD_ | MAC_CR_ASD_;
data |= MAC_CR_CNTR_RST_;
lan743x_csr_write(adapter, MAC_CR, data);
mac_addr_hi = lan743x_csr_read(adapter, MAC_RX_ADDRH);
mac_addr_lo = lan743x_csr_read(adapter, MAC_RX_ADDRL);
adapter->mac_address[0] = mac_addr_lo & 0xFF;
adapter->mac_address[1] = (mac_addr_lo >> 8) & 0xFF;
adapter->mac_address[2] = (mac_addr_lo >> 16) & 0xFF;
adapter->mac_address[3] = (mac_addr_lo >> 24) & 0xFF;
adapter->mac_address[4] = mac_addr_hi & 0xFF;
adapter->mac_address[5] = (mac_addr_hi >> 8) & 0xFF;
if (((mac_addr_hi & 0x0000FFFF) == 0x0000FFFF) &&
mac_addr_lo == 0xFFFFFFFF) {
mac_address_valid = false;
} else if (!is_valid_ether_addr(adapter->mac_address)) {
mac_address_valid = false;
}
if (!mac_address_valid)
random_ether_addr(adapter->mac_address);
lan743x_mac_set_address(adapter, adapter->mac_address);
ether_addr_copy(netdev->dev_addr, adapter->mac_address);
return 0;
}
static int lan743x_mac_open(struct lan743x_adapter *adapter)
{
int ret = 0;
u32 temp;
temp = lan743x_csr_read(adapter, MAC_RX);
lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_);
temp = lan743x_csr_read(adapter, MAC_TX);
lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_);
return ret;
}
static void lan743x_mac_close(struct lan743x_adapter *adapter)
{
u32 temp;
temp = lan743x_csr_read(adapter, MAC_TX);
temp &= ~MAC_TX_TXEN_;
lan743x_csr_write(adapter, MAC_TX, temp);
lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_,
1, 1000, 20000, 100);
temp = lan743x_csr_read(adapter, MAC_RX);
temp &= ~MAC_RX_RXEN_;
lan743x_csr_write(adapter, MAC_RX, temp);
lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
1, 1000, 20000, 100);
}
static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter,
bool tx_enable, bool rx_enable)
{
u32 flow_setting = 0;
/* set maximum pause time because when fifo space frees
* up a zero value pause frame will be sent to release the pause
*/
flow_setting = MAC_FLOW_CR_FCPT_MASK_;
if (tx_enable)
flow_setting |= MAC_FLOW_CR_TX_FCEN_;
if (rx_enable)
flow_setting |= MAC_FLOW_CR_RX_FCEN_;
lan743x_csr_write(adapter, MAC_FLOW, flow_setting);
}
static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu)
{
int enabled = 0;
u32 mac_rx = 0;
mac_rx = lan743x_csr_read(adapter, MAC_RX);
if (mac_rx & MAC_RX_RXEN_) {
enabled = 1;
if (mac_rx & MAC_RX_RXD_) {
lan743x_csr_write(adapter, MAC_RX, mac_rx);
mac_rx &= ~MAC_RX_RXD_;
}
mac_rx &= ~MAC_RX_RXEN_;
lan743x_csr_write(adapter, MAC_RX, mac_rx);
lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_,
1, 1000, 20000, 100);
lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_);
}
mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_);
mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) &
MAC_RX_MAX_SIZE_MASK_);
lan743x_csr_write(adapter, MAC_RX, mac_rx);
if (enabled) {
mac_rx |= MAC_RX_RXEN_;
lan743x_csr_write(adapter, MAC_RX, mac_rx);
}
return 0;
}
/* PHY */
static int lan743x_phy_reset(struct lan743x_adapter *adapter)
{
u32 data;
/* Only called with in probe, and before mdiobus_register */
data = lan743x_csr_read(adapter, PMT_CTL);
data |= PMT_CTL_ETH_PHY_RST_;
lan743x_csr_write(adapter, PMT_CTL, data);
return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data,
(!(data & PMT_CTL_ETH_PHY_RST_) &&
(data & PMT_CTL_READY_)),
50000, 1000000);
}
static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter,
u8 duplex, u16 local_adv,
u16 remote_adv)
{
struct lan743x_phy *phy = &adapter->phy;
u8 cap;
if (phy->fc_autoneg)
cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv);
else
cap = phy->fc_request_control;
lan743x_mac_flow_ctrl_set_enables(adapter,
cap & FLOW_CTRL_TX,
cap & FLOW_CTRL_RX);
}
static int lan743x_phy_init(struct lan743x_adapter *adapter)
{
return lan743x_phy_reset(adapter);
}
static void lan743x_phy_link_status_change(struct net_device *netdev)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
struct phy_device *phydev = netdev->phydev;
phy_print_status(phydev);
if (phydev->state == PHY_RUNNING) {
struct ethtool_link_ksettings ksettings;
int remote_advertisement = 0;
int local_advertisement = 0;
memset(&ksettings, 0, sizeof(ksettings));
phy_ethtool_get_link_ksettings(netdev, &ksettings);
local_advertisement = phy_read(phydev, MII_ADVERTISE);
if (local_advertisement < 0)
return;
remote_advertisement = phy_read(phydev, MII_LPA);
if (remote_advertisement < 0)
return;
lan743x_phy_update_flowcontrol(adapter,
ksettings.base.duplex,
local_advertisement,
remote_advertisement);
}
}
static void lan743x_phy_close(struct lan743x_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
phy_stop(netdev->phydev);
phy_disconnect(netdev->phydev);
netdev->phydev = NULL;
}
static int lan743x_phy_open(struct lan743x_adapter *adapter)
{
struct lan743x_phy *phy = &adapter->phy;
struct phy_device *phydev;
struct net_device *netdev;
int ret = -EIO;
u32 mii_adv;
netdev = adapter->netdev;
phydev = phy_find_first(adapter->mdiobus);
if (!phydev)
goto return_error;
ret = phy_connect_direct(netdev, phydev,
lan743x_phy_link_status_change,
PHY_INTERFACE_MODE_GMII);
if (ret)
goto return_error;
/* MAC doesn't support 1000T Half */
phydev->supported &= ~SUPPORTED_1000baseT_Half;
/* support both flow controls */
phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
phydev->advertising &= ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
mii_adv = (u32)mii_advertise_flowctrl(phy->fc_request_control);
phydev->advertising |= mii_adv_to_ethtool_adv_t(mii_adv);
phy->fc_autoneg = phydev->autoneg;
phy_start(phydev);
phy_start_aneg(phydev);
return 0;
return_error:
return ret;
}
static void lan743x_rfe_update_mac_address(struct lan743x_adapter *adapter)
{
u8 *mac_addr;
u32 mac_addr_hi = 0;
u32 mac_addr_lo = 0;
/* Add mac address to perfect Filter */
mac_addr = adapter->mac_address;
mac_addr_lo = ((((u32)(mac_addr[0])) << 0) |
(((u32)(mac_addr[1])) << 8) |
(((u32)(mac_addr[2])) << 16) |
(((u32)(mac_addr[3])) << 24));
mac_addr_hi = ((((u32)(mac_addr[4])) << 0) |
(((u32)(mac_addr[5])) << 8));
lan743x_csr_write(adapter, RFE_ADDR_FILT_LO(0), mac_addr_lo);
lan743x_csr_write(adapter, RFE_ADDR_FILT_HI(0),
mac_addr_hi | RFE_ADDR_FILT_HI_VALID_);
}
static void lan743x_rfe_set_multicast(struct lan743x_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
u32 hash_table[DP_SEL_VHF_HASH_LEN];
u32 rfctl;
u32 data;
rfctl = lan743x_csr_read(adapter, RFE_CTL);
rfctl &= ~(RFE_CTL_AU_ | RFE_CTL_AM_ |
RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_);
rfctl |= RFE_CTL_AB_;
if (netdev->flags & IFF_PROMISC) {
rfctl |= RFE_CTL_AM_ | RFE_CTL_AU_;
} else {
if (netdev->flags & IFF_ALLMULTI)
rfctl |= RFE_CTL_AM_;
}
memset(hash_table, 0, DP_SEL_VHF_HASH_LEN * sizeof(u32));
if (netdev_mc_count(netdev)) {
struct netdev_hw_addr *ha;
int i;
rfctl |= RFE_CTL_DA_PERFECT_;
i = 1;
netdev_for_each_mc_addr(ha, netdev) {
/* set first 32 into Perfect Filter */
if (i < 33) {
lan743x_csr_write(adapter,
RFE_ADDR_FILT_HI(i), 0);
data = ha->addr[3];
data = ha->addr[2] | (data << 8);
data = ha->addr[1] | (data << 8);
data = ha->addr[0] | (data << 8);
lan743x_csr_write(adapter,
RFE_ADDR_FILT_LO(i), data);
data = ha->addr[5];
data = ha->addr[4] | (data << 8);
data |= RFE_ADDR_FILT_HI_VALID_;
lan743x_csr_write(adapter,
RFE_ADDR_FILT_HI(i), data);
} else {
u32 bitnum = (ether_crc(ETH_ALEN, ha->addr) >>
23) & 0x1FF;
hash_table[bitnum / 32] |= (1 << (bitnum % 32));
rfctl |= RFE_CTL_MCAST_HASH_;
}
i++;
}
}
lan743x_dp_write(adapter, DP_SEL_RFE_RAM,
DP_SEL_VHF_VLAN_LEN,
DP_SEL_VHF_HASH_LEN, hash_table);
lan743x_csr_write(adapter, RFE_CTL, rfctl);
}
static int lan743x_dmac_init(struct lan743x_adapter *adapter)
{
u32 data = 0;
lan743x_csr_write(adapter, DMAC_CMD, DMAC_CMD_SWR_);
lan743x_csr_wait_for_bit(adapter, DMAC_CMD, DMAC_CMD_SWR_,
0, 1000, 20000, 100);
switch (DEFAULT_DMA_DESCRIPTOR_SPACING) {
case DMA_DESCRIPTOR_SPACING_16:
data = DMAC_CFG_MAX_DSPACE_16_;
break;
case DMA_DESCRIPTOR_SPACING_32:
data = DMAC_CFG_MAX_DSPACE_32_;
break;
case DMA_DESCRIPTOR_SPACING_64:
data = DMAC_CFG_MAX_DSPACE_64_;
break;
case DMA_DESCRIPTOR_SPACING_128:
data = DMAC_CFG_MAX_DSPACE_128_;
break;
default:
return -EPERM;
}
if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
data |= DMAC_CFG_COAL_EN_;
data |= DMAC_CFG_CH_ARB_SEL_RX_HIGH_;
data |= DMAC_CFG_MAX_READ_REQ_SET_(6);
lan743x_csr_write(adapter, DMAC_CFG, data);
data = DMAC_COAL_CFG_TIMER_LIMIT_SET_(1);
data |= DMAC_COAL_CFG_TIMER_TX_START_;
data |= DMAC_COAL_CFG_FLUSH_INTS_;
data |= DMAC_COAL_CFG_INT_EXIT_COAL_;
data |= DMAC_COAL_CFG_CSR_EXIT_COAL_;
data |= DMAC_COAL_CFG_TX_THRES_SET_(0x0A);
data |= DMAC_COAL_CFG_RX_THRES_SET_(0x0C);
lan743x_csr_write(adapter, DMAC_COAL_CFG, data);
data = DMAC_OBFF_TX_THRES_SET_(0x08);
data |= DMAC_OBFF_RX_THRES_SET_(0x0A);
lan743x_csr_write(adapter, DMAC_OBFF_CFG, data);
return 0;
}
static int lan743x_dmac_tx_get_state(struct lan743x_adapter *adapter,
int tx_channel)
{
u32 dmac_cmd = 0;
dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
return DMAC_CHANNEL_STATE_SET((dmac_cmd &
DMAC_CMD_START_T_(tx_channel)),
(dmac_cmd &
DMAC_CMD_STOP_T_(tx_channel)));
}
static int lan743x_dmac_tx_wait_till_stopped(struct lan743x_adapter *adapter,
int tx_channel)
{
int timeout = 100;
int result = 0;
while (timeout &&
((result = lan743x_dmac_tx_get_state(adapter, tx_channel)) ==
DMAC_CHANNEL_STATE_STOP_PENDING)) {
usleep_range(1000, 20000);
timeout--;
}
if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
result = -ENODEV;
return result;
}
static int lan743x_dmac_rx_get_state(struct lan743x_adapter *adapter,
int rx_channel)
{
u32 dmac_cmd = 0;
dmac_cmd = lan743x_csr_read(adapter, DMAC_CMD);
return DMAC_CHANNEL_STATE_SET((dmac_cmd &
DMAC_CMD_START_R_(rx_channel)),
(dmac_cmd &
DMAC_CMD_STOP_R_(rx_channel)));
}
static int lan743x_dmac_rx_wait_till_stopped(struct lan743x_adapter *adapter,
int rx_channel)
{
int timeout = 100;
int result = 0;
while (timeout &&
((result = lan743x_dmac_rx_get_state(adapter, rx_channel)) ==
DMAC_CHANNEL_STATE_STOP_PENDING)) {
usleep_range(1000, 20000);
timeout--;
}
if (result == DMAC_CHANNEL_STATE_STOP_PENDING)
result = -ENODEV;
return result;
}
static void lan743x_tx_release_desc(struct lan743x_tx *tx,
int descriptor_index, bool cleanup)
{
struct lan743x_tx_buffer_info *buffer_info = NULL;
struct lan743x_tx_descriptor *descriptor = NULL;
u32 descriptor_type = 0;
descriptor = &tx->ring_cpu_ptr[descriptor_index];
buffer_info = &tx->buffer_info[descriptor_index];
if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_ACTIVE))
goto done;
descriptor_type = (descriptor->data0) &
TX_DESC_DATA0_DTYPE_MASK_;
if (descriptor_type == TX_DESC_DATA0_DTYPE_DATA_)
goto clean_up_data_descriptor;
else
goto clear_active;
clean_up_data_descriptor:
if (buffer_info->dma_ptr) {
if (buffer_info->flags &
TX_BUFFER_INFO_FLAG_SKB_FRAGMENT) {
dma_unmap_page(&tx->adapter->pdev->dev,
buffer_info->dma_ptr,
buffer_info->buffer_length,
DMA_TO_DEVICE);
} else {
dma_unmap_single(&tx->adapter->pdev->dev,
buffer_info->dma_ptr,
buffer_info->buffer_length,
DMA_TO_DEVICE);
}
buffer_info->dma_ptr = 0;
buffer_info->buffer_length = 0;
}
if (buffer_info->skb) {
dev_kfree_skb(buffer_info->skb);
buffer_info->skb = NULL;
}
clear_active:
buffer_info->flags &= ~TX_BUFFER_INFO_FLAG_ACTIVE;
done:
memset(buffer_info, 0, sizeof(*buffer_info));
memset(descriptor, 0, sizeof(*descriptor));
}
static int lan743x_tx_next_index(struct lan743x_tx *tx, int index)
{
return ((++index) % tx->ring_size);
}
static void lan743x_tx_release_completed_descriptors(struct lan743x_tx *tx)
{
while ((*tx->head_cpu_ptr) != (tx->last_head)) {
lan743x_tx_release_desc(tx, tx->last_head, false);
tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
}
}
static void lan743x_tx_release_all_descriptors(struct lan743x_tx *tx)
{
u32 original_head = 0;
original_head = tx->last_head;
do {
lan743x_tx_release_desc(tx, tx->last_head, true);
tx->last_head = lan743x_tx_next_index(tx, tx->last_head);
} while (tx->last_head != original_head);
memset(tx->ring_cpu_ptr, 0,
sizeof(*tx->ring_cpu_ptr) * (tx->ring_size));
memset(tx->buffer_info, 0,
sizeof(*tx->buffer_info) * (tx->ring_size));
}
static int lan743x_tx_get_desc_cnt(struct lan743x_tx *tx,
struct sk_buff *skb)
{
int result = 1; /* 1 for the main skb buffer */
int nr_frags = 0;
if (skb_is_gso(skb))
result++; /* requires an extension descriptor */
nr_frags = skb_shinfo(skb)->nr_frags;
result += nr_frags; /* 1 for each fragment buffer */
return result;
}
static int lan743x_tx_get_avail_desc(struct lan743x_tx *tx)
{
int last_head = tx->last_head;
int last_tail = tx->last_tail;
if (last_tail >= last_head)
return tx->ring_size - last_tail + last_head - 1;
else
return last_head - last_tail - 1;
}
static int lan743x_tx_frame_start(struct lan743x_tx *tx,
unsigned char *first_buffer,
unsigned int first_buffer_length,
unsigned int frame_length,
bool check_sum)
{
/* called only from within lan743x_tx_xmit_frame.
* assuming tx->ring_lock has already been acquired.
*/
struct lan743x_tx_descriptor *tx_descriptor = NULL;
struct lan743x_tx_buffer_info *buffer_info = NULL;
struct lan743x_adapter *adapter = tx->adapter;
struct device *dev = &adapter->pdev->dev;
dma_addr_t dma_ptr;
tx->frame_flags |= TX_FRAME_FLAG_IN_PROGRESS;
tx->frame_first = tx->last_tail;
tx->frame_tail = tx->frame_first;
tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
buffer_info = &tx->buffer_info[tx->frame_tail];
dma_ptr = dma_map_single(dev, first_buffer, first_buffer_length,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_ptr))
return -ENOMEM;
tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
tx_descriptor->data3 = (frame_length << 16) &
TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
buffer_info->skb = NULL;
buffer_info->dma_ptr = dma_ptr;
buffer_info->buffer_length = first_buffer_length;
buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
tx->frame_data0 = (first_buffer_length &
TX_DESC_DATA0_BUF_LENGTH_MASK_) |
TX_DESC_DATA0_DTYPE_DATA_ |
TX_DESC_DATA0_FS_ |
TX_DESC_DATA0_FCS_;
if (check_sum)
tx->frame_data0 |= TX_DESC_DATA0_ICE_ |
TX_DESC_DATA0_IPE_ |
TX_DESC_DATA0_TPE_;
/* data0 will be programmed in one of other frame assembler functions */
return 0;
}
static void lan743x_tx_frame_add_lso(struct lan743x_tx *tx,
unsigned int frame_length)
{
/* called only from within lan743x_tx_xmit_frame.
* assuming tx->ring_lock has already been acquired.
*/
struct lan743x_tx_descriptor *tx_descriptor = NULL;
struct lan743x_tx_buffer_info *buffer_info = NULL;
/* wrap up previous descriptor */
tx->frame_data0 |= TX_DESC_DATA0_EXT_;
tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
tx_descriptor->data0 = tx->frame_data0;
/* move to next descriptor */
tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
buffer_info = &tx->buffer_info[tx->frame_tail];
/* add extension descriptor */
tx_descriptor->data1 = 0;
tx_descriptor->data2 = 0;
tx_descriptor->data3 = 0;
buffer_info->skb = NULL;
buffer_info->dma_ptr = 0;
buffer_info->buffer_length = 0;
buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
tx->frame_data0 = (frame_length & TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_) |
TX_DESC_DATA0_DTYPE_EXT_ |
TX_DESC_DATA0_EXT_LSO_;
/* data0 will be programmed in one of other frame assembler functions */
}
static int lan743x_tx_frame_add_fragment(struct lan743x_tx *tx,
const struct skb_frag_struct *fragment,
unsigned int frame_length)
{
/* called only from within lan743x_tx_xmit_frame
* assuming tx->ring_lock has already been acquired
*/
struct lan743x_tx_descriptor *tx_descriptor = NULL;
struct lan743x_tx_buffer_info *buffer_info = NULL;
struct lan743x_adapter *adapter = tx->adapter;
struct device *dev = &adapter->pdev->dev;
unsigned int fragment_length = 0;
dma_addr_t dma_ptr;
fragment_length = skb_frag_size(fragment);
if (!fragment_length)
return 0;
/* wrap up previous descriptor */
tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
tx_descriptor->data0 = tx->frame_data0;
/* move to next descriptor */
tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
buffer_info = &tx->buffer_info[tx->frame_tail];
dma_ptr = skb_frag_dma_map(dev, fragment,
0, fragment_length,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, dma_ptr)) {
int desc_index;
/* cleanup all previously setup descriptors */
desc_index = tx->frame_first;
while (desc_index != tx->frame_tail) {
lan743x_tx_release_desc(tx, desc_index, true);
desc_index = lan743x_tx_next_index(tx, desc_index);
}
dma_wmb();
tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
tx->frame_first = 0;
tx->frame_data0 = 0;
tx->frame_tail = 0;
return -ENOMEM;
}
tx_descriptor->data1 = DMA_ADDR_LOW32(dma_ptr);
tx_descriptor->data2 = DMA_ADDR_HIGH32(dma_ptr);
tx_descriptor->data3 = (frame_length << 16) &
TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_;
buffer_info->skb = NULL;
buffer_info->dma_ptr = dma_ptr;
buffer_info->buffer_length = fragment_length;
buffer_info->flags |= TX_BUFFER_INFO_FLAG_ACTIVE;
buffer_info->flags |= TX_BUFFER_INFO_FLAG_SKB_FRAGMENT;
tx->frame_data0 = (fragment_length & TX_DESC_DATA0_BUF_LENGTH_MASK_) |
TX_DESC_DATA0_DTYPE_DATA_ |
TX_DESC_DATA0_FCS_;
/* data0 will be programmed in one of other frame assembler functions */
return 0;
}
static void lan743x_tx_frame_end(struct lan743x_tx *tx,
struct sk_buff *skb,
bool ignore_sync)
{
/* called only from within lan743x_tx_xmit_frame
* assuming tx->ring_lock has already been acquired
*/
struct lan743x_tx_descriptor *tx_descriptor = NULL;
struct lan743x_tx_buffer_info *buffer_info = NULL;
struct lan743x_adapter *adapter = tx->adapter;
u32 tx_tail_flags = 0;
/* wrap up previous descriptor */
tx->frame_data0 |= TX_DESC_DATA0_LS_;
tx->frame_data0 |= TX_DESC_DATA0_IOC_;
tx_descriptor = &tx->ring_cpu_ptr[tx->frame_tail];
buffer_info = &tx->buffer_info[tx->frame_tail];
buffer_info->skb = skb;
if (ignore_sync)
buffer_info->flags |= TX_BUFFER_INFO_FLAG_IGNORE_SYNC;
tx_descriptor->data0 = tx->frame_data0;
tx->frame_tail = lan743x_tx_next_index(tx, tx->frame_tail);
tx->last_tail = tx->frame_tail;
dma_wmb();
if (tx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
tx_tail_flags |= TX_TAIL_SET_TOP_INT_VEC_EN_;
if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET)
tx_tail_flags |= TX_TAIL_SET_DMAC_INT_EN_ |
TX_TAIL_SET_TOP_INT_EN_;
lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
tx_tail_flags | tx->frame_tail);
tx->frame_flags &= ~TX_FRAME_FLAG_IN_PROGRESS;
}
static netdev_tx_t lan743x_tx_xmit_frame(struct lan743x_tx *tx,
struct sk_buff *skb)
{
int required_number_of_descriptors = 0;
unsigned int start_frame_length = 0;
unsigned int frame_length = 0;
unsigned int head_length = 0;
unsigned long irq_flags = 0;
bool ignore_sync = false;
int nr_frags = 0;
bool gso = false;
int j;
required_number_of_descriptors = lan743x_tx_get_desc_cnt(tx, skb);
spin_lock_irqsave(&tx->ring_lock, irq_flags);
if (required_number_of_descriptors >
lan743x_tx_get_avail_desc(tx)) {
if (required_number_of_descriptors > (tx->ring_size - 1)) {
dev_kfree_skb(skb);
} else {
/* save to overflow buffer */
tx->overflow_skb = skb;
netif_stop_queue(tx->adapter->netdev);
}
goto unlock;
}
/* space available, transmit skb */
head_length = skb_headlen(skb);
frame_length = skb_pagelen(skb);
nr_frags = skb_shinfo(skb)->nr_frags;
start_frame_length = frame_length;
gso = skb_is_gso(skb);
if (gso) {
start_frame_length = max(skb_shinfo(skb)->gso_size,
(unsigned short)8);
}
if (lan743x_tx_frame_start(tx,
skb->data, head_length,
start_frame_length,
skb->ip_summed == CHECKSUM_PARTIAL)) {
dev_kfree_skb(skb);
goto unlock;
}
if (gso)
lan743x_tx_frame_add_lso(tx, frame_length);
if (nr_frags <= 0)
goto finish;
for (j = 0; j < nr_frags; j++) {
const struct skb_frag_struct *frag;
frag = &(skb_shinfo(skb)->frags[j]);
if (lan743x_tx_frame_add_fragment(tx, frag, frame_length)) {
/* upon error no need to call
* lan743x_tx_frame_end
* frame assembler clean up was performed inside
* lan743x_tx_frame_add_fragment
*/
dev_kfree_skb(skb);
goto unlock;
}
}
finish:
lan743x_tx_frame_end(tx, skb, ignore_sync);
unlock:
spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
return NETDEV_TX_OK;
}
static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight)
{
struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi);
struct lan743x_adapter *adapter = tx->adapter;
bool start_transmitter = false;
unsigned long irq_flags = 0;
u32 ioc_bit = 0;
u32 int_sts = 0;
ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number);
int_sts = lan743x_csr_read(adapter, DMAC_INT_STS);
if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C)
lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit);
spin_lock_irqsave(&tx->ring_lock, irq_flags);
/* clean up tx ring */
lan743x_tx_release_completed_descriptors(tx);
if (netif_queue_stopped(adapter->netdev)) {
if (tx->overflow_skb) {
if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <=
lan743x_tx_get_avail_desc(tx))
start_transmitter = true;
} else {
netif_wake_queue(adapter->netdev);
}
}
spin_unlock_irqrestore(&tx->ring_lock, irq_flags);
if (start_transmitter) {
/* space is now available, transmit overflow skb */
lan743x_tx_xmit_frame(tx, tx->overflow_skb);
tx->overflow_skb = NULL;
netif_wake_queue(adapter->netdev);
}
if (!napi_complete_done(napi, weight))
goto done;
/* enable isr */
lan743x_csr_write(adapter, INT_EN_SET,
INT_BIT_DMA_TX_(tx->channel_number));
lan743x_csr_read(adapter, INT_STS);
done:
return weight;
}
static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx)
{
if (tx->head_cpu_ptr) {
pci_free_consistent(tx->adapter->pdev,
sizeof(*tx->head_cpu_ptr),
(void *)(tx->head_cpu_ptr),
tx->head_dma_ptr);
tx->head_cpu_ptr = NULL;
tx->head_dma_ptr = 0;
}
kfree(tx->buffer_info);
tx->buffer_info = NULL;
if (tx->ring_cpu_ptr) {
pci_free_consistent(tx->adapter->pdev,
tx->ring_allocation_size,
tx->ring_cpu_ptr,
tx->ring_dma_ptr);
tx->ring_allocation_size = 0;
tx->ring_cpu_ptr = NULL;
tx->ring_dma_ptr = 0;
}
tx->ring_size = 0;
}
static int lan743x_tx_ring_init(struct lan743x_tx *tx)
{
size_t ring_allocation_size = 0;
void *cpu_ptr = NULL;
dma_addr_t dma_ptr;
int ret = -ENOMEM;
tx->ring_size = LAN743X_TX_RING_SIZE;
if (tx->ring_size & ~TX_CFG_B_TX_RING_LEN_MASK_) {
ret = -EINVAL;
goto cleanup;
}
ring_allocation_size = ALIGN(tx->ring_size *
sizeof(struct lan743x_tx_descriptor),
PAGE_SIZE);
dma_ptr = 0;
cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
ring_allocation_size, &dma_ptr);
if (!cpu_ptr) {
ret = -ENOMEM;
goto cleanup;
}
tx->ring_allocation_size = ring_allocation_size;
tx->ring_cpu_ptr = (struct lan743x_tx_descriptor *)cpu_ptr;
tx->ring_dma_ptr = dma_ptr;
cpu_ptr = kcalloc(tx->ring_size, sizeof(*tx->buffer_info), GFP_KERNEL);
if (!cpu_ptr) {
ret = -ENOMEM;
goto cleanup;
}
tx->buffer_info = (struct lan743x_tx_buffer_info *)cpu_ptr;
dma_ptr = 0;
cpu_ptr = pci_zalloc_consistent(tx->adapter->pdev,
sizeof(*tx->head_cpu_ptr), &dma_ptr);
if (!cpu_ptr) {
ret = -ENOMEM;
goto cleanup;
}
tx->head_cpu_ptr = cpu_ptr;
tx->head_dma_ptr = dma_ptr;
if (tx->head_dma_ptr & 0x3) {
ret = -ENOMEM;
goto cleanup;
}
return 0;
cleanup:
lan743x_tx_ring_cleanup(tx);
return ret;
}
static void lan743x_tx_close(struct lan743x_tx *tx)
{
struct lan743x_adapter *adapter = tx->adapter;
lan743x_csr_write(adapter,
DMAC_CMD,
DMAC_CMD_STOP_T_(tx->channel_number));
lan743x_dmac_tx_wait_till_stopped(adapter, tx->channel_number);
lan743x_csr_write(adapter,
DMAC_INT_EN_CLR,
DMAC_INT_BIT_TX_IOC_(tx->channel_number));
lan743x_csr_write(adapter, INT_EN_CLR,
INT_BIT_DMA_TX_(tx->channel_number));
napi_disable(&tx->napi);
netif_napi_del(&tx->napi);
lan743x_csr_write(adapter, FCT_TX_CTL,
FCT_TX_CTL_DIS_(tx->channel_number));
lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
FCT_TX_CTL_EN_(tx->channel_number),
0, 1000, 20000, 100);
lan743x_tx_release_all_descriptors(tx);
if (tx->overflow_skb) {
dev_kfree_skb(tx->overflow_skb);
tx->overflow_skb = NULL;
}
lan743x_tx_ring_cleanup(tx);
}
static int lan743x_tx_open(struct lan743x_tx *tx)
{
struct lan743x_adapter *adapter = NULL;
u32 data = 0;
int ret;
adapter = tx->adapter;
ret = lan743x_tx_ring_init(tx);
if (ret)
return ret;
/* initialize fifo */
lan743x_csr_write(adapter, FCT_TX_CTL,
FCT_TX_CTL_RESET_(tx->channel_number));
lan743x_csr_wait_for_bit(adapter, FCT_TX_CTL,
FCT_TX_CTL_RESET_(tx->channel_number),
0, 1000, 20000, 100);
/* enable fifo */
lan743x_csr_write(adapter, FCT_TX_CTL,
FCT_TX_CTL_EN_(tx->channel_number));
/* reset tx channel */
lan743x_csr_write(adapter, DMAC_CMD,
DMAC_CMD_TX_SWR_(tx->channel_number));
lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
DMAC_CMD_TX_SWR_(tx->channel_number),
0, 1000, 20000, 100);
/* Write TX_BASE_ADDR */
lan743x_csr_write(adapter,
TX_BASE_ADDRH(tx->channel_number),
DMA_ADDR_HIGH32(tx->ring_dma_ptr));
lan743x_csr_write(adapter,
TX_BASE_ADDRL(tx->channel_number),
DMA_ADDR_LOW32(tx->ring_dma_ptr));
/* Write TX_CFG_B */
data = lan743x_csr_read(adapter, TX_CFG_B(tx->channel_number));
data &= ~TX_CFG_B_TX_RING_LEN_MASK_;
data |= ((tx->ring_size) & TX_CFG_B_TX_RING_LEN_MASK_);
if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
data |= TX_CFG_B_TDMABL_512_;
lan743x_csr_write(adapter, TX_CFG_B(tx->channel_number), data);
/* Write TX_CFG_A */
data = TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ | TX_CFG_A_TX_HP_WB_EN_;
if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
data |= TX_CFG_A_TX_HP_WB_ON_INT_TMR_;
data |= TX_CFG_A_TX_PF_THRES_SET_(0x10);
data |= TX_CFG_A_TX_PF_PRI_THRES_SET_(0x04);
data |= TX_CFG_A_TX_HP_WB_THRES_SET_(0x07);
}
lan743x_csr_write(adapter, TX_CFG_A(tx->channel_number), data);
/* Write TX_HEAD_WRITEBACK_ADDR */
lan743x_csr_write(adapter,
TX_HEAD_WRITEBACK_ADDRH(tx->channel_number),
DMA_ADDR_HIGH32(tx->head_dma_ptr));
lan743x_csr_write(adapter,
TX_HEAD_WRITEBACK_ADDRL(tx->channel_number),
DMA_ADDR_LOW32(tx->head_dma_ptr));
/* set last head */
tx->last_head = lan743x_csr_read(adapter, TX_HEAD(tx->channel_number));
/* write TX_TAIL */
tx->last_tail = 0;
lan743x_csr_write(adapter, TX_TAIL(tx->channel_number),
(u32)(tx->last_tail));
tx->vector_flags = lan743x_intr_get_vector_flags(adapter,
INT_BIT_DMA_TX_
(tx->channel_number));
netif_napi_add(adapter->netdev,
&tx->napi, lan743x_tx_napi_poll,
tx->ring_size - 1);
napi_enable(&tx->napi);
data = 0;
if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
data |= TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_;
if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
data |= TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_;
if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
data |= TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_;
if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
data |= TX_CFG_C_TX_INT_EN_R2C_;
lan743x_csr_write(adapter, TX_CFG_C(tx->channel_number), data);
if (!(tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET))
lan743x_csr_write(adapter, INT_EN_SET,
INT_BIT_DMA_TX_(tx->channel_number));
lan743x_csr_write(adapter, DMAC_INT_EN_SET,
DMAC_INT_BIT_TX_IOC_(tx->channel_number));
/* start dmac channel */
lan743x_csr_write(adapter, DMAC_CMD,
DMAC_CMD_START_T_(tx->channel_number));
return 0;
}
static int lan743x_rx_next_index(struct lan743x_rx *rx, int index)
{
return ((++index) % rx->ring_size);
}
static int lan743x_rx_allocate_ring_element(struct lan743x_rx *rx, int index)
{
struct lan743x_rx_buffer_info *buffer_info;
struct lan743x_rx_descriptor *descriptor;
int length = 0;
length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING);
descriptor = &rx->ring_cpu_ptr[index];
buffer_info = &rx->buffer_info[index];
buffer_info->skb = __netdev_alloc_skb(rx->adapter->netdev,
length,
GFP_ATOMIC | GFP_DMA);
if (!(buffer_info->skb))
return -ENOMEM;
buffer_info->dma_ptr = dma_map_single(&rx->adapter->pdev->dev,
buffer_info->skb->data,
length,
DMA_FROM_DEVICE);
if (dma_mapping_error(&rx->adapter->pdev->dev,
buffer_info->dma_ptr)) {
buffer_info->dma_ptr = 0;
return -ENOMEM;
}
buffer_info->buffer_length = length;
descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
descriptor->data3 = 0;
descriptor->data0 = (RX_DESC_DATA0_OWN_ |
(length & RX_DESC_DATA0_BUF_LENGTH_MASK_));
skb_reserve(buffer_info->skb, RX_HEAD_PADDING);
return 0;
}
static void lan743x_rx_reuse_ring_element(struct lan743x_rx *rx, int index)
{
struct lan743x_rx_buffer_info *buffer_info;
struct lan743x_rx_descriptor *descriptor;
descriptor = &rx->ring_cpu_ptr[index];
buffer_info = &rx->buffer_info[index];
descriptor->data1 = DMA_ADDR_LOW32(buffer_info->dma_ptr);
descriptor->data2 = DMA_ADDR_HIGH32(buffer_info->dma_ptr);
descriptor->data3 = 0;
descriptor->data0 = (RX_DESC_DATA0_OWN_ |
((buffer_info->buffer_length) &
RX_DESC_DATA0_BUF_LENGTH_MASK_));
}
static void lan743x_rx_release_ring_element(struct lan743x_rx *rx, int index)
{
struct lan743x_rx_buffer_info *buffer_info;
struct lan743x_rx_descriptor *descriptor;
descriptor = &rx->ring_cpu_ptr[index];
buffer_info = &rx->buffer_info[index];
memset(descriptor, 0, sizeof(*descriptor));
if (buffer_info->dma_ptr) {
dma_unmap_single(&rx->adapter->pdev->dev,
buffer_info->dma_ptr,
buffer_info->buffer_length,
DMA_FROM_DEVICE);
buffer_info->dma_ptr = 0;
}
if (buffer_info->skb) {
dev_kfree_skb(buffer_info->skb);
buffer_info->skb = NULL;
}
memset(buffer_info, 0, sizeof(*buffer_info));
}
static int lan743x_rx_process_packet(struct lan743x_rx *rx)
{
struct skb_shared_hwtstamps *hwtstamps = NULL;
int result = RX_PROCESS_RESULT_NOTHING_TO_DO;
struct lan743x_rx_buffer_info *buffer_info;
struct lan743x_rx_descriptor *descriptor;
int current_head_index = -1;
int extension_index = -1;
int first_index = -1;
int last_index = -1;
current_head_index = *rx->head_cpu_ptr;
if (current_head_index < 0 || current_head_index >= rx->ring_size)
goto done;
if (rx->last_head < 0 || rx->last_head >= rx->ring_size)
goto done;
if (rx->last_head != current_head_index) {
descriptor = &rx->ring_cpu_ptr[rx->last_head];
if (descriptor->data0 & RX_DESC_DATA0_OWN_)
goto done;
if (!(descriptor->data0 & RX_DESC_DATA0_FS_))
goto done;
first_index = rx->last_head;
if (descriptor->data0 & RX_DESC_DATA0_LS_) {
last_index = rx->last_head;
} else {
int index;
index = lan743x_rx_next_index(rx, first_index);
while (index != current_head_index) {
descriptor = &rx->ring_cpu_ptr[index];
if (descriptor->data0 & RX_DESC_DATA0_OWN_)
goto done;
if (descriptor->data0 & RX_DESC_DATA0_LS_) {
last_index = index;
break;
}
index = lan743x_rx_next_index(rx, index);
}
}
if (last_index >= 0) {
descriptor = &rx->ring_cpu_ptr[last_index];
if (descriptor->data0 & RX_DESC_DATA0_EXT_) {
/* extension is expected to follow */
int index = lan743x_rx_next_index(rx,
last_index);
if (index != current_head_index) {
descriptor = &rx->ring_cpu_ptr[index];
if (descriptor->data0 &
RX_DESC_DATA0_OWN_) {
goto done;
}
if (descriptor->data0 &
RX_DESC_DATA0_EXT_) {
extension_index = index;
} else {
goto done;
}
} else {
/* extension is not yet available */
/* prevent processing of this packet */
first_index = -1;
last_index = -1;
}
}
}
}
if (first_index >= 0 && last_index >= 0) {
int real_last_index = last_index;
struct sk_buff *skb = NULL;
u32 ts_sec = 0;
u32 ts_nsec = 0;
/* packet is available */
if (first_index == last_index) {
/* single buffer packet */
int packet_length;
buffer_info = &rx->buffer_info[first_index];
skb = buffer_info->skb;
descriptor = &rx->ring_cpu_ptr[first_index];
/* unmap from dma */
if (buffer_info->dma_ptr) {
dma_unmap_single(&rx->adapter->pdev->dev,
buffer_info->dma_ptr,
buffer_info->buffer_length,
DMA_FROM_DEVICE);
buffer_info->dma_ptr = 0;
buffer_info->buffer_length = 0;
}
buffer_info->skb = NULL;
packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
(descriptor->data0);
skb_put(skb, packet_length - 4);
skb->protocol = eth_type_trans(skb,
rx->adapter->netdev);
lan743x_rx_allocate_ring_element(rx, first_index);
} else {
int index = first_index;
/* multi buffer packet not supported */
/* this should not happen since
* buffers are allocated to be at least jumbo size
*/
/* clean up buffers */
if (first_index <= last_index) {
while ((index >= first_index) &&
(index <= last_index)) {
lan743x_rx_release_ring_element(rx,
index);
lan743x_rx_allocate_ring_element(rx,
index);
index = lan743x_rx_next_index(rx,
index);
}
} else {
while ((index >= first_index) ||
(index <= last_index)) {
lan743x_rx_release_ring_element(rx,
index);
lan743x_rx_allocate_ring_element(rx,
index);
index = lan743x_rx_next_index(rx,
index);
}
}
}
if (extension_index >= 0) {
descriptor = &rx->ring_cpu_ptr[extension_index];
buffer_info = &rx->buffer_info[extension_index];
ts_sec = descriptor->data1;
ts_nsec = (descriptor->data2 &
RX_DESC_DATA2_TS_NS_MASK_);
lan743x_rx_reuse_ring_element(rx, extension_index);
real_last_index = extension_index;
}
if (!skb) {
result = RX_PROCESS_RESULT_PACKET_DROPPED;
goto move_forward;
}
if (extension_index < 0)
goto pass_packet_to_os;
hwtstamps = skb_hwtstamps(skb);
if (hwtstamps)
hwtstamps->hwtstamp = ktime_set(ts_sec, ts_nsec);
pass_packet_to_os:
/* pass packet to OS */
napi_gro_receive(&rx->napi, skb);
result = RX_PROCESS_RESULT_PACKET_RECEIVED;
move_forward:
/* push tail and head forward */
rx->last_tail = real_last_index;
rx->last_head = lan743x_rx_next_index(rx, real_last_index);
}
done:
return result;
}
static int lan743x_rx_napi_poll(struct napi_struct *napi, int weight)
{
struct lan743x_rx *rx = container_of(napi, struct lan743x_rx, napi);
struct lan743x_adapter *adapter = rx->adapter;
u32 rx_tail_flags = 0;
int count;
if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) {
/* clear int status bit before reading packet */
lan743x_csr_write(adapter, DMAC_INT_STS,
DMAC_INT_BIT_RXFRM_(rx->channel_number));
}
count = 0;
while (count < weight) {
int rx_process_result = -1;
rx_process_result = lan743x_rx_process_packet(rx);
if (rx_process_result == RX_PROCESS_RESULT_PACKET_RECEIVED) {
count++;
} else if (rx_process_result ==
RX_PROCESS_RESULT_NOTHING_TO_DO) {
break;
} else if (rx_process_result ==
RX_PROCESS_RESULT_PACKET_DROPPED) {
continue;
}
}
rx->frame_count += count;
if (count == weight)
goto done;
if (!napi_complete_done(napi, count))
goto done;
if (rx->vector_flags & LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET)
rx_tail_flags |= RX_TAIL_SET_TOP_INT_VEC_EN_;
if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET) {
rx_tail_flags |= RX_TAIL_SET_TOP_INT_EN_;
} else {
lan743x_csr_write(adapter, INT_EN_SET,
INT_BIT_DMA_RX_(rx->channel_number));
}
/* update RX_TAIL */
lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
rx_tail_flags | rx->last_tail);
done:
return count;
}
static void lan743x_rx_ring_cleanup(struct lan743x_rx *rx)
{
if (rx->buffer_info && rx->ring_cpu_ptr) {
int index;
for (index = 0; index < rx->ring_size; index++)
lan743x_rx_release_ring_element(rx, index);
}
if (rx->head_cpu_ptr) {
pci_free_consistent(rx->adapter->pdev,
sizeof(*rx->head_cpu_ptr),
rx->head_cpu_ptr,
rx->head_dma_ptr);
rx->head_cpu_ptr = NULL;
rx->head_dma_ptr = 0;
}
kfree(rx->buffer_info);
rx->buffer_info = NULL;
if (rx->ring_cpu_ptr) {
pci_free_consistent(rx->adapter->pdev,
rx->ring_allocation_size,
rx->ring_cpu_ptr,
rx->ring_dma_ptr);
rx->ring_allocation_size = 0;
rx->ring_cpu_ptr = NULL;
rx->ring_dma_ptr = 0;
}
rx->ring_size = 0;
rx->last_head = 0;
}
static int lan743x_rx_ring_init(struct lan743x_rx *rx)
{
size_t ring_allocation_size = 0;
dma_addr_t dma_ptr = 0;
void *cpu_ptr = NULL;
int ret = -ENOMEM;
int index = 0;
rx->ring_size = LAN743X_RX_RING_SIZE;
if (rx->ring_size <= 1) {
ret = -EINVAL;
goto cleanup;
}
if (rx->ring_size & ~RX_CFG_B_RX_RING_LEN_MASK_) {
ret = -EINVAL;
goto cleanup;
}
ring_allocation_size = ALIGN(rx->ring_size *
sizeof(struct lan743x_rx_descriptor),
PAGE_SIZE);
dma_ptr = 0;
cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
ring_allocation_size, &dma_ptr);
if (!cpu_ptr) {
ret = -ENOMEM;
goto cleanup;
}
rx->ring_allocation_size = ring_allocation_size;
rx->ring_cpu_ptr = (struct lan743x_rx_descriptor *)cpu_ptr;
rx->ring_dma_ptr = dma_ptr;
cpu_ptr = kcalloc(rx->ring_size, sizeof(*rx->buffer_info),
GFP_KERNEL);
if (!cpu_ptr) {
ret = -ENOMEM;
goto cleanup;
}
rx->buffer_info = (struct lan743x_rx_buffer_info *)cpu_ptr;
dma_ptr = 0;
cpu_ptr = pci_zalloc_consistent(rx->adapter->pdev,
sizeof(*rx->head_cpu_ptr), &dma_ptr);
if (!cpu_ptr) {
ret = -ENOMEM;
goto cleanup;
}
rx->head_cpu_ptr = cpu_ptr;
rx->head_dma_ptr = dma_ptr;
if (rx->head_dma_ptr & 0x3) {
ret = -ENOMEM;
goto cleanup;
}
rx->last_head = 0;
for (index = 0; index < rx->ring_size; index++) {
ret = lan743x_rx_allocate_ring_element(rx, index);
if (ret)
goto cleanup;
}
return 0;
cleanup:
lan743x_rx_ring_cleanup(rx);
return ret;
}
static void lan743x_rx_close(struct lan743x_rx *rx)
{
struct lan743x_adapter *adapter = rx->adapter;
lan743x_csr_write(adapter, FCT_RX_CTL,
FCT_RX_CTL_DIS_(rx->channel_number));
lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
FCT_RX_CTL_EN_(rx->channel_number),
0, 1000, 20000, 100);
lan743x_csr_write(adapter, DMAC_CMD,
DMAC_CMD_STOP_R_(rx->channel_number));
lan743x_dmac_rx_wait_till_stopped(adapter, rx->channel_number);
lan743x_csr_write(adapter, DMAC_INT_EN_CLR,
DMAC_INT_BIT_RXFRM_(rx->channel_number));
lan743x_csr_write(adapter, INT_EN_CLR,
INT_BIT_DMA_RX_(rx->channel_number));
napi_disable(&rx->napi);
netif_napi_del(&rx->napi);
lan743x_rx_ring_cleanup(rx);
}
static int lan743x_rx_open(struct lan743x_rx *rx)
{
struct lan743x_adapter *adapter = rx->adapter;
u32 data = 0;
int ret;
rx->frame_count = 0;
ret = lan743x_rx_ring_init(rx);
if (ret)
goto return_error;
netif_napi_add(adapter->netdev,
&rx->napi, lan743x_rx_napi_poll,
rx->ring_size - 1);
lan743x_csr_write(adapter, DMAC_CMD,
DMAC_CMD_RX_SWR_(rx->channel_number));
lan743x_csr_wait_for_bit(adapter, DMAC_CMD,
DMAC_CMD_RX_SWR_(rx->channel_number),
0, 1000, 20000, 100);
/* set ring base address */
lan743x_csr_write(adapter,
RX_BASE_ADDRH(rx->channel_number),
DMA_ADDR_HIGH32(rx->ring_dma_ptr));
lan743x_csr_write(adapter,
RX_BASE_ADDRL(rx->channel_number),
DMA_ADDR_LOW32(rx->ring_dma_ptr));
/* set rx write back address */
lan743x_csr_write(adapter,
RX_HEAD_WRITEBACK_ADDRH(rx->channel_number),
DMA_ADDR_HIGH32(rx->head_dma_ptr));
lan743x_csr_write(adapter,
RX_HEAD_WRITEBACK_ADDRL(rx->channel_number),
DMA_ADDR_LOW32(rx->head_dma_ptr));
data = RX_CFG_A_RX_HP_WB_EN_;
if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0)) {
data |= (RX_CFG_A_RX_WB_ON_INT_TMR_ |
RX_CFG_A_RX_WB_THRES_SET_(0x7) |
RX_CFG_A_RX_PF_THRES_SET_(16) |
RX_CFG_A_RX_PF_PRI_THRES_SET_(4));
}
/* set RX_CFG_A */
lan743x_csr_write(adapter,
RX_CFG_A(rx->channel_number), data);
/* set RX_CFG_B */
data = lan743x_csr_read(adapter, RX_CFG_B(rx->channel_number));
data &= ~RX_CFG_B_RX_PAD_MASK_;
if (!RX_HEAD_PADDING)
data |= RX_CFG_B_RX_PAD_0_;
else
data |= RX_CFG_B_RX_PAD_2_;
data &= ~RX_CFG_B_RX_RING_LEN_MASK_;
data |= ((rx->ring_size) & RX_CFG_B_RX_RING_LEN_MASK_);
data |= RX_CFG_B_TS_ALL_RX_;
if (!(adapter->csr.flags & LAN743X_CSR_FLAG_IS_A0))
data |= RX_CFG_B_RDMABL_512_;
lan743x_csr_write(adapter, RX_CFG_B(rx->channel_number), data);
rx->vector_flags = lan743x_intr_get_vector_flags(adapter,
INT_BIT_DMA_RX_
(rx->channel_number));
/* set RX_CFG_C */
data = 0;
if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR)
data |= RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_;
if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR)
data |= RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_;
if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C)
data |= RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_;
if (rx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C)
data |= RX_CFG_C_RX_INT_EN_R2C_;
lan743x_csr_write(adapter, RX_CFG_C(rx->channel_number), data);
rx->last_tail = ((u32)(rx->ring_size - 1));
lan743x_csr_write(adapter, RX_TAIL(rx->channel_number),
rx->last_tail);
rx->last_head = lan743x_csr_read(adapter, RX_HEAD(rx->channel_number));
if (rx->last_head) {
ret = -EIO;
goto napi_delete;
}
napi_enable(&rx->napi);
lan743x_csr_write(adapter, INT_EN_SET,
INT_BIT_DMA_RX_(rx->channel_number));
lan743x_csr_write(adapter, DMAC_INT_STS,
DMAC_INT_BIT_RXFRM_(rx->channel_number));
lan743x_csr_write(adapter, DMAC_INT_EN_SET,
DMAC_INT_BIT_RXFRM_(rx->channel_number));
lan743x_csr_write(adapter, DMAC_CMD,
DMAC_CMD_START_R_(rx->channel_number));
/* initialize fifo */
lan743x_csr_write(adapter, FCT_RX_CTL,
FCT_RX_CTL_RESET_(rx->channel_number));
lan743x_csr_wait_for_bit(adapter, FCT_RX_CTL,
FCT_RX_CTL_RESET_(rx->channel_number),
0, 1000, 20000, 100);
lan743x_csr_write(adapter, FCT_FLOW(rx->channel_number),
FCT_FLOW_CTL_REQ_EN_ |
FCT_FLOW_CTL_ON_THRESHOLD_SET_(0x2A) |
FCT_FLOW_CTL_OFF_THRESHOLD_SET_(0xA));
/* enable fifo */
lan743x_csr_write(adapter, FCT_RX_CTL,
FCT_RX_CTL_EN_(rx->channel_number));
return 0;
napi_delete:
netif_napi_del(&rx->napi);
lan743x_rx_ring_cleanup(rx);
return_error:
return ret;
}
static int lan743x_netdev_close(struct net_device *netdev)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
int index;
lan743x_tx_close(&adapter->tx[0]);
for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++)
lan743x_rx_close(&adapter->rx[index]);
lan743x_phy_close(adapter);
lan743x_mac_close(adapter);
lan743x_intr_close(adapter);
return 0;
}
static int lan743x_netdev_open(struct net_device *netdev)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
int index;
int ret;
ret = lan743x_intr_open(adapter);
if (ret)
goto return_error;
ret = lan743x_mac_open(adapter);
if (ret)
goto close_intr;
ret = lan743x_phy_open(adapter);
if (ret)
goto close_mac;
for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
ret = lan743x_rx_open(&adapter->rx[index]);
if (ret)
goto close_rx;
}
ret = lan743x_tx_open(&adapter->tx[0]);
if (ret)
goto close_rx;
return 0;
close_rx:
for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
if (adapter->rx[index].ring_cpu_ptr)
lan743x_rx_close(&adapter->rx[index]);
}
lan743x_phy_close(adapter);
close_mac:
lan743x_mac_close(adapter);
close_intr:
lan743x_intr_close(adapter);
return_error:
netif_warn(adapter, ifup, adapter->netdev,
"Error opening LAN743x\n");
return ret;
}
static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
struct net_device *netdev)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
return lan743x_tx_xmit_frame(&adapter->tx[0], skb);
}
static int lan743x_netdev_ioctl(struct net_device *netdev,
struct ifreq *ifr, int cmd)
{
if (!netif_running(netdev))
return -EINVAL;
return phy_mii_ioctl(netdev->phydev, ifr, cmd);
}
static void lan743x_netdev_set_multicast(struct net_device *netdev)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
lan743x_rfe_set_multicast(adapter);
}
static int lan743x_netdev_change_mtu(struct net_device *netdev, int new_mtu)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
int ret = 0;
ret = lan743x_mac_set_mtu(adapter, new_mtu);
if (!ret)
netdev->mtu = new_mtu;
return ret;
}
static void lan743x_netdev_get_stats64(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
stats->rx_packets = lan743x_csr_read(adapter, STAT_RX_TOTAL_FRAMES);
stats->tx_packets = lan743x_csr_read(adapter, STAT_TX_TOTAL_FRAMES);
stats->rx_bytes = lan743x_csr_read(adapter,
STAT_RX_UNICAST_BYTE_COUNT) +
lan743x_csr_read(adapter,
STAT_RX_BROADCAST_BYTE_COUNT) +
lan743x_csr_read(adapter,
STAT_RX_MULTICAST_BYTE_COUNT);
stats->tx_bytes = lan743x_csr_read(adapter,
STAT_TX_UNICAST_BYTE_COUNT) +
lan743x_csr_read(adapter,
STAT_TX_BROADCAST_BYTE_COUNT) +
lan743x_csr_read(adapter,
STAT_TX_MULTICAST_BYTE_COUNT);
stats->rx_errors = lan743x_csr_read(adapter, STAT_RX_FCS_ERRORS) +
lan743x_csr_read(adapter,
STAT_RX_ALIGNMENT_ERRORS) +
lan743x_csr_read(adapter, STAT_RX_JABBER_ERRORS) +
lan743x_csr_read(adapter,
STAT_RX_UNDERSIZE_FRAME_ERRORS) +
lan743x_csr_read(adapter,
STAT_RX_OVERSIZE_FRAME_ERRORS);
stats->tx_errors = lan743x_csr_read(adapter, STAT_TX_FCS_ERRORS) +
lan743x_csr_read(adapter,
STAT_TX_EXCESS_DEFERRAL_ERRORS) +
lan743x_csr_read(adapter, STAT_TX_CARRIER_ERRORS);
stats->rx_dropped = lan743x_csr_read(adapter,
STAT_RX_DROPPED_FRAMES);
stats->tx_dropped = lan743x_csr_read(adapter,
STAT_TX_EXCESSIVE_COLLISION);
stats->multicast = lan743x_csr_read(adapter,
STAT_RX_MULTICAST_FRAMES) +
lan743x_csr_read(adapter,
STAT_TX_MULTICAST_FRAMES);
stats->collisions = lan743x_csr_read(adapter,
STAT_TX_SINGLE_COLLISIONS) +
lan743x_csr_read(adapter,
STAT_TX_MULTIPLE_COLLISIONS) +
lan743x_csr_read(adapter,
STAT_TX_LATE_COLLISIONS);
}
static int lan743x_netdev_set_mac_address(struct net_device *netdev,
void *addr)
{
struct lan743x_adapter *adapter = netdev_priv(netdev);
struct sockaddr *sock_addr = addr;
int ret;
ret = eth_prepare_mac_addr_change(netdev, sock_addr);
if (ret)
return ret;
ether_addr_copy(netdev->dev_addr, sock_addr->sa_data);
lan743x_mac_set_address(adapter, sock_addr->sa_data);
lan743x_rfe_update_mac_address(adapter);
return 0;
}
static const struct net_device_ops lan743x_netdev_ops = {
.ndo_open = lan743x_netdev_open,
.ndo_stop = lan743x_netdev_close,
.ndo_start_xmit = lan743x_netdev_xmit_frame,
.ndo_do_ioctl = lan743x_netdev_ioctl,
.ndo_set_rx_mode = lan743x_netdev_set_multicast,
.ndo_change_mtu = lan743x_netdev_change_mtu,
.ndo_get_stats64 = lan743x_netdev_get_stats64,
.ndo_set_mac_address = lan743x_netdev_set_mac_address,
};
static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
{
lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
}
static void lan743x_mdiobus_cleanup(struct lan743x_adapter *adapter)
{
mdiobus_unregister(adapter->mdiobus);
}
static void lan743x_full_cleanup(struct lan743x_adapter *adapter)
{
unregister_netdev(adapter->netdev);
lan743x_mdiobus_cleanup(adapter);
lan743x_hardware_cleanup(adapter);
lan743x_pci_cleanup(adapter);
}
static int lan743x_hardware_init(struct lan743x_adapter *adapter,
struct pci_dev *pdev)
{
struct lan743x_tx *tx;
int index;
int ret;
adapter->intr.irq = adapter->pdev->irq;
lan743x_csr_write(adapter, INT_EN_CLR, 0xFFFFFFFF);
mutex_init(&adapter->dp_lock);
ret = lan743x_mac_init(adapter);
if (ret)
return ret;
ret = lan743x_phy_init(adapter);
if (ret)
return ret;
lan743x_rfe_update_mac_address(adapter);
ret = lan743x_dmac_init(adapter);
if (ret)
return ret;
for (index = 0; index < LAN743X_USED_RX_CHANNELS; index++) {
adapter->rx[index].adapter = adapter;
adapter->rx[index].channel_number = index;
}
tx = &adapter->tx[0];
tx->adapter = adapter;
tx->channel_number = 0;
spin_lock_init(&tx->ring_lock);
return 0;
}
static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
{
int ret;
adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
if (!(adapter->mdiobus)) {
ret = -ENOMEM;
goto return_error;
}
adapter->mdiobus->priv = (void *)adapter;
adapter->mdiobus->read = lan743x_mdiobus_read;
adapter->mdiobus->write = lan743x_mdiobus_write;
adapter->mdiobus->name = "lan743x-mdiobus";
snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE,
"pci-%s", pci_name(adapter->pdev));
/* set to internal PHY id */
adapter->mdiobus->phy_mask = ~(u32)BIT(1);
/* register mdiobus */
ret = mdiobus_register(adapter->mdiobus);
if (ret < 0)
goto return_error;
return 0;
return_error:
return ret;
}
/* lan743x_pcidev_probe - Device Initialization Routine
* @pdev: PCI device information struct
* @id: entry in lan743x_pci_tbl
*
* Returns 0 on success, negative on failure
*
* initializes an adapter identified by a pci_dev structure.
* The OS initialization, configuring of the adapter private structure,
* and a hardware reset occur.
**/
static int lan743x_pcidev_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct lan743x_adapter *adapter = NULL;
struct net_device *netdev = NULL;
int ret = -ENODEV;
netdev = devm_alloc_etherdev(&pdev->dev,
sizeof(struct lan743x_adapter));
if (!netdev)
goto return_error;
SET_NETDEV_DEV(netdev, &pdev->dev);
pci_set_drvdata(pdev, netdev);
adapter = netdev_priv(netdev);
adapter->netdev = netdev;
adapter->msg_enable = NETIF_MSG_DRV | NETIF_MSG_PROBE |
NETIF_MSG_LINK | NETIF_MSG_IFUP |
NETIF_MSG_IFDOWN | NETIF_MSG_TX_QUEUED;
netdev->max_mtu = LAN743X_MAX_FRAME_SIZE;
ret = lan743x_pci_init(adapter, pdev);
if (ret)
goto return_error;
ret = lan743x_csr_init(adapter);
if (ret)
goto cleanup_pci;
ret = lan743x_hardware_init(adapter, pdev);
if (ret)
goto cleanup_pci;
ret = lan743x_mdiobus_init(adapter);
if (ret)
goto cleanup_hardware;
adapter->netdev->netdev_ops = &lan743x_netdev_ops;
adapter->netdev->features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HW_CSUM;
adapter->netdev->hw_features = adapter->netdev->features;
/* carrier off reporting is important to ethtool even BEFORE open */
netif_carrier_off(netdev);
ret = register_netdev(adapter->netdev);
if (ret < 0)
goto cleanup_mdiobus;
return 0;
cleanup_mdiobus:
lan743x_mdiobus_cleanup(adapter);
cleanup_hardware:
lan743x_hardware_cleanup(adapter);
cleanup_pci:
lan743x_pci_cleanup(adapter);
return_error:
pr_warn("Initialization failed\n");
return ret;
}
/**
* lan743x_pcidev_remove - Device Removal Routine
* @pdev: PCI device information struct
*
* this is called by the PCI subsystem to alert the driver
* that it should release a PCI device. This could be caused by a
* Hot-Plug event, or because the driver is going to be removed from
* memory.
**/
static void lan743x_pcidev_remove(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct lan743x_adapter *adapter = netdev_priv(netdev);
lan743x_full_cleanup(adapter);
}
static void lan743x_pcidev_shutdown(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct lan743x_adapter *adapter = netdev_priv(netdev);
rtnl_lock();
netif_device_detach(netdev);
/* close netdev when netdev is at running state.
* For instance, it is true when system goes to sleep by pm-suspend
* However, it is false when system goes to sleep by suspend GUI menu
*/
if (netif_running(netdev))
lan743x_netdev_close(netdev);
rtnl_unlock();
/* clean up lan743x portion */
lan743x_hardware_cleanup(adapter);
}
static const struct pci_device_id lan743x_pcidev_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) },
{ 0, }
};
static struct pci_driver lan743x_pcidev_driver = {
.name = DRIVER_NAME,
.id_table = lan743x_pcidev_tbl,
.probe = lan743x_pcidev_probe,
.remove = lan743x_pcidev_remove,
.shutdown = lan743x_pcidev_shutdown,
};
module_pci_driver(lan743x_pcidev_driver);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
View Git Blame Copy Permalink