--- /dev/null
+/* 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;
+}
+
+u32 lan743x_csr_read(struct lan743x_adapter *adapter, int offset)
+{
+ return ioread32(&adapter->csr.csr_address[offset]);
+}
+
+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)
+{
+ struct net_device *netdev;
+ int ret;
+
+ netdev = adapter->netdev;
+ ret = lan743x_phy_reset(adapter);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+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;
+ struct lan743x_phy *phy = NULL;
+ int remote_advertisement = 0;
+ int local_advertisement = 0;
+
+ phy = &adapter->phy;
+ 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;
+
+ adapter = tx->adapter;
+ 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");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (C) 2018 Microchip Technology Inc. */
+
+#ifndef _LAN743X_H
+#define _LAN743X_H
+
+#define DRIVER_AUTHOR "Bryan Whitehead <Bryan.Whitehead@microchip.com>"
+#define DRIVER_DESC "LAN743x PCIe Gigabit Ethernet Driver"
+#define DRIVER_NAME "lan743x"
+
+/* Register Definitions */
+#define ID_REV (0x00)
+#define ID_REV_IS_VALID_CHIP_ID_(id_rev) \
+ (((id_rev) & 0xFFF00000) == 0x74300000)
+#define ID_REV_CHIP_REV_MASK_ (0x0000FFFF)
+#define ID_REV_CHIP_REV_A0_ (0x00000000)
+#define ID_REV_CHIP_REV_B0_ (0x00000010)
+
+#define FPGA_REV (0x04)
+#define FPGA_REV_GET_MINOR_(fpga_rev) (((fpga_rev) >> 8) & 0x000000FF)
+#define FPGA_REV_GET_MAJOR_(fpga_rev) ((fpga_rev) & 0x000000FF)
+
+#define HW_CFG (0x010)
+#define HW_CFG_LRST_ BIT(1)
+
+#define PMT_CTL (0x014)
+#define PMT_CTL_READY_ BIT(7)
+#define PMT_CTL_ETH_PHY_RST_ BIT(4)
+
+#define DP_SEL (0x024)
+#define DP_SEL_DPRDY_ BIT(31)
+#define DP_SEL_MASK_ (0x0000001F)
+#define DP_SEL_RFE_RAM (0x00000001)
+
+#define DP_SEL_VHF_HASH_LEN (16)
+#define DP_SEL_VHF_VLAN_LEN (128)
+
+#define DP_CMD (0x028)
+#define DP_CMD_WRITE_ (0x00000001)
+
+#define DP_ADDR (0x02C)
+
+#define DP_DATA_0 (0x030)
+
+#define FCT_RX_CTL (0xAC)
+#define FCT_RX_CTL_EN_(channel) BIT(28 + (channel))
+#define FCT_RX_CTL_DIS_(channel) BIT(24 + (channel))
+#define FCT_RX_CTL_RESET_(channel) BIT(20 + (channel))
+
+#define FCT_TX_CTL (0xC4)
+#define FCT_TX_CTL_EN_(channel) BIT(28 + (channel))
+#define FCT_TX_CTL_DIS_(channel) BIT(24 + (channel))
+#define FCT_TX_CTL_RESET_(channel) BIT(20 + (channel))
+
+#define FCT_FLOW(rx_channel) (0xE0 + ((rx_channel) << 2))
+#define FCT_FLOW_CTL_OFF_THRESHOLD_ (0x00007F00)
+#define FCT_FLOW_CTL_OFF_THRESHOLD_SET_(value) \
+ ((value << 8) & FCT_FLOW_CTL_OFF_THRESHOLD_)
+#define FCT_FLOW_CTL_REQ_EN_ BIT(7)
+#define FCT_FLOW_CTL_ON_THRESHOLD_ (0x0000007F)
+#define FCT_FLOW_CTL_ON_THRESHOLD_SET_(value) \
+ ((value << 0) & FCT_FLOW_CTL_ON_THRESHOLD_)
+
+#define MAC_CR (0x100)
+#define MAC_CR_ADD_ BIT(12)
+#define MAC_CR_ASD_ BIT(11)
+#define MAC_CR_CNTR_RST_ BIT(5)
+#define MAC_CR_RST_ BIT(0)
+
+#define MAC_RX (0x104)
+#define MAC_RX_MAX_SIZE_SHIFT_ (16)
+#define MAC_RX_MAX_SIZE_MASK_ (0x3FFF0000)
+#define MAC_RX_RXD_ BIT(1)
+#define MAC_RX_RXEN_ BIT(0)
+
+#define MAC_TX (0x108)
+#define MAC_TX_TXD_ BIT(1)
+#define MAC_TX_TXEN_ BIT(0)
+
+#define MAC_FLOW (0x10C)
+#define MAC_FLOW_CR_TX_FCEN_ BIT(30)
+#define MAC_FLOW_CR_RX_FCEN_ BIT(29)
+#define MAC_FLOW_CR_FCPT_MASK_ (0x0000FFFF)
+
+#define MAC_RX_ADDRH (0x118)
+
+#define MAC_RX_ADDRL (0x11C)
+
+#define MAC_MII_ACC (0x120)
+#define MAC_MII_ACC_PHY_ADDR_SHIFT_ (11)
+#define MAC_MII_ACC_PHY_ADDR_MASK_ (0x0000F800)
+#define MAC_MII_ACC_MIIRINDA_SHIFT_ (6)
+#define MAC_MII_ACC_MIIRINDA_MASK_ (0x000007C0)
+#define MAC_MII_ACC_MII_READ_ (0x00000000)
+#define MAC_MII_ACC_MII_WRITE_ (0x00000002)
+#define MAC_MII_ACC_MII_BUSY_ BIT(0)
+
+#define MAC_MII_DATA (0x124)
+
+/* offset 0x400 - 0x500, x may range from 0 to 32, for a total of 33 entries */
+#define RFE_ADDR_FILT_HI(x) (0x400 + (8 * (x)))
+#define RFE_ADDR_FILT_HI_VALID_ BIT(31)
+
+/* offset 0x404 - 0x504, x may range from 0 to 32, for a total of 33 entries */
+#define RFE_ADDR_FILT_LO(x) (0x404 + (8 * (x)))
+
+#define RFE_CTL (0x508)
+#define RFE_CTL_AB_ BIT(10)
+#define RFE_CTL_AM_ BIT(9)
+#define RFE_CTL_AU_ BIT(8)
+#define RFE_CTL_MCAST_HASH_ BIT(3)
+#define RFE_CTL_DA_PERFECT_ BIT(1)
+
+#define INT_STS (0x780)
+#define INT_BIT_DMA_RX_(channel) BIT(24 + (channel))
+#define INT_BIT_ALL_RX_ (0x0F000000)
+#define INT_BIT_DMA_TX_(channel) BIT(16 + (channel))
+#define INT_BIT_ALL_TX_ (0x000F0000)
+#define INT_BIT_SW_GP_ BIT(9)
+#define INT_BIT_ALL_OTHER_ (0x00000280)
+#define INT_BIT_MAS_ BIT(0)
+
+#define INT_SET (0x784)
+
+#define INT_EN_SET (0x788)
+
+#define INT_EN_CLR (0x78C)
+
+#define INT_STS_R2C (0x790)
+
+#define INT_VEC_EN_SET (0x794)
+#define INT_VEC_EN_CLR (0x798)
+#define INT_VEC_EN_AUTO_CLR (0x79C)
+#define INT_VEC_EN_(vector_index) BIT(0 + vector_index)
+
+#define INT_VEC_MAP0 (0x7A0)
+#define INT_VEC_MAP0_RX_VEC_(channel, vector) \
+ (((u32)(vector)) << ((channel) << 2))
+
+#define INT_VEC_MAP1 (0x7A4)
+#define INT_VEC_MAP1_TX_VEC_(channel, vector) \
+ (((u32)(vector)) << ((channel) << 2))
+
+#define INT_VEC_MAP2 (0x7A8)
+
+#define INT_MOD_MAP0 (0x7B0)
+
+#define INT_MOD_MAP1 (0x7B4)
+
+#define INT_MOD_MAP2 (0x7B8)
+
+#define INT_MOD_CFG0 (0x7C0)
+#define INT_MOD_CFG1 (0x7C4)
+#define INT_MOD_CFG2 (0x7C8)
+#define INT_MOD_CFG3 (0x7CC)
+#define INT_MOD_CFG4 (0x7D0)
+#define INT_MOD_CFG5 (0x7D4)
+#define INT_MOD_CFG6 (0x7D8)
+#define INT_MOD_CFG7 (0x7DC)
+
+#define DMAC_CFG (0xC00)
+#define DMAC_CFG_COAL_EN_ BIT(16)
+#define DMAC_CFG_CH_ARB_SEL_RX_HIGH_ (0x00000000)
+#define DMAC_CFG_MAX_READ_REQ_MASK_ (0x00000070)
+#define DMAC_CFG_MAX_READ_REQ_SET_(val) \
+ ((((u32)(val)) << 4) & DMAC_CFG_MAX_READ_REQ_MASK_)
+#define DMAC_CFG_MAX_DSPACE_16_ (0x00000000)
+#define DMAC_CFG_MAX_DSPACE_32_ (0x00000001)
+#define DMAC_CFG_MAX_DSPACE_64_ BIT(1)
+#define DMAC_CFG_MAX_DSPACE_128_ (0x00000003)
+
+#define DMAC_COAL_CFG (0xC04)
+#define DMAC_COAL_CFG_TIMER_LIMIT_MASK_ (0xFFF00000)
+#define DMAC_COAL_CFG_TIMER_LIMIT_SET_(val) \
+ ((((u32)(val)) << 20) & DMAC_COAL_CFG_TIMER_LIMIT_MASK_)
+#define DMAC_COAL_CFG_TIMER_TX_START_ BIT(19)
+#define DMAC_COAL_CFG_FLUSH_INTS_ BIT(18)
+#define DMAC_COAL_CFG_INT_EXIT_COAL_ BIT(17)
+#define DMAC_COAL_CFG_CSR_EXIT_COAL_ BIT(16)
+#define DMAC_COAL_CFG_TX_THRES_MASK_ (0x0000FF00)
+#define DMAC_COAL_CFG_TX_THRES_SET_(val) \
+ ((((u32)(val)) << 8) & DMAC_COAL_CFG_TX_THRES_MASK_)
+#define DMAC_COAL_CFG_RX_THRES_MASK_ (0x000000FF)
+#define DMAC_COAL_CFG_RX_THRES_SET_(val) \
+ (((u32)(val)) & DMAC_COAL_CFG_RX_THRES_MASK_)
+
+#define DMAC_OBFF_CFG (0xC08)
+#define DMAC_OBFF_TX_THRES_MASK_ (0x0000FF00)
+#define DMAC_OBFF_TX_THRES_SET_(val) \
+ ((((u32)(val)) << 8) & DMAC_OBFF_TX_THRES_MASK_)
+#define DMAC_OBFF_RX_THRES_MASK_ (0x000000FF)
+#define DMAC_OBFF_RX_THRES_SET_(val) \
+ (((u32)(val)) & DMAC_OBFF_RX_THRES_MASK_)
+
+#define DMAC_CMD (0xC0C)
+#define DMAC_CMD_SWR_ BIT(31)
+#define DMAC_CMD_TX_SWR_(channel) BIT(24 + (channel))
+#define DMAC_CMD_START_T_(channel) BIT(20 + (channel))
+#define DMAC_CMD_STOP_T_(channel) BIT(16 + (channel))
+#define DMAC_CMD_RX_SWR_(channel) BIT(8 + (channel))
+#define DMAC_CMD_START_R_(channel) BIT(4 + (channel))
+#define DMAC_CMD_STOP_R_(channel) BIT(0 + (channel))
+
+#define DMAC_INT_STS (0xC10)
+#define DMAC_INT_EN_SET (0xC14)
+#define DMAC_INT_EN_CLR (0xC18)
+#define DMAC_INT_BIT_RXFRM_(channel) BIT(16 + (channel))
+#define DMAC_INT_BIT_TX_IOC_(channel) BIT(0 + (channel))
+
+#define RX_CFG_A(channel) (0xC40 + ((channel) << 6))
+#define RX_CFG_A_RX_WB_ON_INT_TMR_ BIT(30)
+#define RX_CFG_A_RX_WB_THRES_MASK_ (0x1F000000)
+#define RX_CFG_A_RX_WB_THRES_SET_(val) \
+ ((((u32)(val)) << 24) & RX_CFG_A_RX_WB_THRES_MASK_)
+#define RX_CFG_A_RX_PF_THRES_MASK_ (0x001F0000)
+#define RX_CFG_A_RX_PF_THRES_SET_(val) \
+ ((((u32)(val)) << 16) & RX_CFG_A_RX_PF_THRES_MASK_)
+#define RX_CFG_A_RX_PF_PRI_THRES_MASK_ (0x00001F00)
+#define RX_CFG_A_RX_PF_PRI_THRES_SET_(val) \
+ ((((u32)(val)) << 8) & RX_CFG_A_RX_PF_PRI_THRES_MASK_)
+#define RX_CFG_A_RX_HP_WB_EN_ BIT(5)
+
+#define RX_CFG_B(channel) (0xC44 + ((channel) << 6))
+#define RX_CFG_B_TS_ALL_RX_ BIT(29)
+#define RX_CFG_B_RX_PAD_MASK_ (0x03000000)
+#define RX_CFG_B_RX_PAD_0_ (0x00000000)
+#define RX_CFG_B_RX_PAD_2_ (0x02000000)
+#define RX_CFG_B_RDMABL_512_ (0x00040000)
+#define RX_CFG_B_RX_RING_LEN_MASK_ (0x0000FFFF)
+
+#define RX_BASE_ADDRH(channel) (0xC48 + ((channel) << 6))
+
+#define RX_BASE_ADDRL(channel) (0xC4C + ((channel) << 6))
+
+#define RX_HEAD_WRITEBACK_ADDRH(channel) (0xC50 + ((channel) << 6))
+
+#define RX_HEAD_WRITEBACK_ADDRL(channel) (0xC54 + ((channel) << 6))
+
+#define RX_HEAD(channel) (0xC58 + ((channel) << 6))
+
+#define RX_TAIL(channel) (0xC5C + ((channel) << 6))
+#define RX_TAIL_SET_TOP_INT_EN_ BIT(30)
+#define RX_TAIL_SET_TOP_INT_VEC_EN_ BIT(29)
+
+#define RX_CFG_C(channel) (0xC64 + ((channel) << 6))
+#define RX_CFG_C_RX_TOP_INT_EN_AUTO_CLR_ BIT(6)
+#define RX_CFG_C_RX_INT_EN_R2C_ BIT(4)
+#define RX_CFG_C_RX_DMA_INT_STS_AUTO_CLR_ BIT(3)
+#define RX_CFG_C_RX_INT_STS_R2C_MODE_MASK_ (0x00000007)
+
+#define TX_CFG_A(channel) (0xD40 + ((channel) << 6))
+#define TX_CFG_A_TX_HP_WB_ON_INT_TMR_ BIT(30)
+#define TX_CFG_A_TX_TMR_HPWB_SEL_IOC_ (0x10000000)
+#define TX_CFG_A_TX_PF_THRES_MASK_ (0x001F0000)
+#define TX_CFG_A_TX_PF_THRES_SET_(value) \
+ ((((u32)(value)) << 16) & TX_CFG_A_TX_PF_THRES_MASK_)
+#define TX_CFG_A_TX_PF_PRI_THRES_MASK_ (0x00001F00)
+#define TX_CFG_A_TX_PF_PRI_THRES_SET_(value) \
+ ((((u32)(value)) << 8) & TX_CFG_A_TX_PF_PRI_THRES_MASK_)
+#define TX_CFG_A_TX_HP_WB_EN_ BIT(5)
+#define TX_CFG_A_TX_HP_WB_THRES_MASK_ (0x0000000F)
+#define TX_CFG_A_TX_HP_WB_THRES_SET_(value) \
+ (((u32)(value)) & TX_CFG_A_TX_HP_WB_THRES_MASK_)
+
+#define TX_CFG_B(channel) (0xD44 + ((channel) << 6))
+#define TX_CFG_B_TDMABL_512_ (0x00040000)
+#define TX_CFG_B_TX_RING_LEN_MASK_ (0x0000FFFF)
+
+#define TX_BASE_ADDRH(channel) (0xD48 + ((channel) << 6))
+
+#define TX_BASE_ADDRL(channel) (0xD4C + ((channel) << 6))
+
+#define TX_HEAD_WRITEBACK_ADDRH(channel) (0xD50 + ((channel) << 6))
+
+#define TX_HEAD_WRITEBACK_ADDRL(channel) (0xD54 + ((channel) << 6))
+
+#define TX_HEAD(channel) (0xD58 + ((channel) << 6))
+
+#define TX_TAIL(channel) (0xD5C + ((channel) << 6))
+#define TX_TAIL_SET_DMAC_INT_EN_ BIT(31)
+#define TX_TAIL_SET_TOP_INT_EN_ BIT(30)
+#define TX_TAIL_SET_TOP_INT_VEC_EN_ BIT(29)
+
+#define TX_CFG_C(channel) (0xD64 + ((channel) << 6))
+#define TX_CFG_C_TX_TOP_INT_EN_AUTO_CLR_ BIT(6)
+#define TX_CFG_C_TX_DMA_INT_EN_AUTO_CLR_ BIT(5)
+#define TX_CFG_C_TX_INT_EN_R2C_ BIT(4)
+#define TX_CFG_C_TX_DMA_INT_STS_AUTO_CLR_ BIT(3)
+#define TX_CFG_C_TX_INT_STS_R2C_MODE_MASK_ (0x00000007)
+
+/* MAC statistics registers */
+#define STAT_RX_FCS_ERRORS (0x1200)
+#define STAT_RX_ALIGNMENT_ERRORS (0x1204)
+#define STAT_RX_JABBER_ERRORS (0x120C)
+#define STAT_RX_UNDERSIZE_FRAME_ERRORS (0x1210)
+#define STAT_RX_OVERSIZE_FRAME_ERRORS (0x1214)
+#define STAT_RX_DROPPED_FRAMES (0x1218)
+#define STAT_RX_UNICAST_BYTE_COUNT (0x121C)
+#define STAT_RX_BROADCAST_BYTE_COUNT (0x1220)
+#define STAT_RX_MULTICAST_BYTE_COUNT (0x1224)
+#define STAT_RX_MULTICAST_FRAMES (0x1230)
+#define STAT_RX_TOTAL_FRAMES (0x1254)
+
+#define STAT_TX_FCS_ERRORS (0x1280)
+#define STAT_TX_EXCESS_DEFERRAL_ERRORS (0x1284)
+#define STAT_TX_CARRIER_ERRORS (0x1288)
+#define STAT_TX_SINGLE_COLLISIONS (0x1290)
+#define STAT_TX_MULTIPLE_COLLISIONS (0x1294)
+#define STAT_TX_EXCESSIVE_COLLISION (0x1298)
+#define STAT_TX_LATE_COLLISIONS (0x129C)
+#define STAT_TX_UNICAST_BYTE_COUNT (0x12A0)
+#define STAT_TX_BROADCAST_BYTE_COUNT (0x12A4)
+#define STAT_TX_MULTICAST_BYTE_COUNT (0x12A8)
+#define STAT_TX_MULTICAST_FRAMES (0x12B4)
+#define STAT_TX_TOTAL_FRAMES (0x12D8)
+
+/* End of Register definitions */
+
+#define LAN743X_MAX_RX_CHANNELS (4)
+#define LAN743X_MAX_TX_CHANNELS (1)
+struct lan743x_adapter;
+
+#define LAN743X_USED_RX_CHANNELS (4)
+#define LAN743X_USED_TX_CHANNELS (1)
+#define LAN743X_INT_MOD (400)
+
+#if (LAN743X_USED_RX_CHANNELS > LAN743X_MAX_RX_CHANNELS)
+#error Invalid LAN743X_USED_RX_CHANNELS
+#endif
+#if (LAN743X_USED_TX_CHANNELS > LAN743X_MAX_TX_CHANNELS)
+#error Invalid LAN743X_USED_TX_CHANNELS
+#endif
+
+/* PCI */
+/* SMSC acquired EFAR late 1990's, MCHP acquired SMSC 2012 */
+#define PCI_VENDOR_ID_SMSC PCI_VENDOR_ID_EFAR
+#define PCI_DEVICE_ID_SMSC_LAN7430 (0x7430)
+
+#define PCI_CONFIG_LENGTH (0x1000)
+
+/* CSR */
+#define CSR_LENGTH (0x2000)
+
+#define LAN743X_CSR_FLAG_IS_A0 BIT(0)
+#define LAN743X_CSR_FLAG_IS_B0 BIT(1)
+#define LAN743X_CSR_FLAG_SUPPORTS_INTR_AUTO_SET_CLR BIT(8)
+
+struct lan743x_csr {
+ u32 flags;
+ u8 __iomem *csr_address;
+ u32 id_rev;
+ u32 fpga_rev;
+};
+
+/* INTERRUPTS */
+typedef void(*lan743x_vector_handler)(void *context, u32 int_sts, u32 flags);
+
+#define LAN743X_VECTOR_FLAG_IRQ_SHARED BIT(0)
+#define LAN743X_VECTOR_FLAG_SOURCE_STATUS_READ BIT(1)
+#define LAN743X_VECTOR_FLAG_SOURCE_STATUS_R2C BIT(2)
+#define LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C BIT(3)
+#define LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CHECK BIT(4)
+#define LAN743X_VECTOR_FLAG_SOURCE_ENABLE_CLEAR BIT(5)
+#define LAN743X_VECTOR_FLAG_SOURCE_ENABLE_R2C BIT(6)
+#define LAN743X_VECTOR_FLAG_MASTER_ENABLE_CLEAR BIT(7)
+#define LAN743X_VECTOR_FLAG_MASTER_ENABLE_SET BIT(8)
+#define LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_CLEAR BIT(9)
+#define LAN743X_VECTOR_FLAG_VECTOR_ENABLE_ISR_SET BIT(10)
+#define LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_CLEAR BIT(11)
+#define LAN743X_VECTOR_FLAG_VECTOR_ENABLE_AUTO_SET BIT(12)
+#define LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_CLEAR BIT(13)
+#define LAN743X_VECTOR_FLAG_SOURCE_ENABLE_AUTO_SET BIT(14)
+#define LAN743X_VECTOR_FLAG_SOURCE_STATUS_AUTO_CLEAR BIT(15)
+
+struct lan743x_vector {
+ int irq;
+ u32 flags;
+ struct lan743x_adapter *adapter;
+ int vector_index;
+ u32 int_mask;
+ lan743x_vector_handler handler;
+ void *context;
+};
+
+#define LAN743X_MAX_VECTOR_COUNT (8)
+
+struct lan743x_intr {
+ int flags;
+
+ unsigned int irq;
+
+ struct lan743x_vector vector_list[LAN743X_MAX_VECTOR_COUNT];
+ int number_of_vectors;
+ bool using_vectors;
+
+ int software_isr_flag;
+};
+
+#define LAN743X_MAX_FRAME_SIZE (9 * 1024)
+
+/* PHY */
+struct lan743x_phy {
+ bool fc_autoneg;
+ u8 fc_request_control;
+};
+
+/* TX */
+struct lan743x_tx_descriptor;
+struct lan743x_tx_buffer_info;
+
+#define GPIO_QUEUE_STARTED (0)
+#define GPIO_TX_FUNCTION (1)
+#define GPIO_TX_COMPLETION (2)
+#define GPIO_TX_FRAGMENT (3)
+
+#define TX_FRAME_FLAG_IN_PROGRESS BIT(0)
+
+struct lan743x_tx {
+ struct lan743x_adapter *adapter;
+ u32 vector_flags;
+ int channel_number;
+
+ int ring_size;
+ size_t ring_allocation_size;
+ struct lan743x_tx_descriptor *ring_cpu_ptr;
+ dma_addr_t ring_dma_ptr;
+ /* ring_lock: used to prevent concurrent access to tx ring */
+ spinlock_t ring_lock;
+ u32 frame_flags;
+ u32 frame_first;
+ u32 frame_data0;
+ u32 frame_tail;
+
+ struct lan743x_tx_buffer_info *buffer_info;
+
+ u32 *head_cpu_ptr;
+ dma_addr_t head_dma_ptr;
+ int last_head;
+ int last_tail;
+
+ struct napi_struct napi;
+
+ struct sk_buff *overflow_skb;
+};
+
+/* RX */
+struct lan743x_rx_descriptor;
+struct lan743x_rx_buffer_info;
+
+struct lan743x_rx {
+ struct lan743x_adapter *adapter;
+ u32 vector_flags;
+ int channel_number;
+
+ int ring_size;
+ size_t ring_allocation_size;
+ struct lan743x_rx_descriptor *ring_cpu_ptr;
+ dma_addr_t ring_dma_ptr;
+
+ struct lan743x_rx_buffer_info *buffer_info;
+
+ u32 *head_cpu_ptr;
+ dma_addr_t head_dma_ptr;
+ u32 last_head;
+ u32 last_tail;
+
+ struct napi_struct napi;
+
+ u32 frame_count;
+};
+
+struct lan743x_adapter {
+ struct net_device *netdev;
+ struct mii_bus *mdiobus;
+ int msg_enable;
+ struct pci_dev *pdev;
+ struct lan743x_csr csr;
+ struct lan743x_intr intr;
+
+ /* lock, used to prevent concurrent access to data port */
+ struct mutex dp_lock;
+
+ u8 mac_address[ETH_ALEN];
+
+ struct lan743x_phy phy;
+ struct lan743x_tx tx[LAN743X_MAX_TX_CHANNELS];
+ struct lan743x_rx rx[LAN743X_MAX_RX_CHANNELS];
+};
+
+#define LAN743X_COMPONENT_FLAG_RX(channel) BIT(20 + (channel))
+
+#define INTR_FLAG_IRQ_REQUESTED(vector_index) BIT(0 + vector_index)
+#define INTR_FLAG_MSI_ENABLED BIT(8)
+#define INTR_FLAG_MSIX_ENABLED BIT(9)
+
+#define MAC_MII_READ 1
+#define MAC_MII_WRITE 0
+
+#define PHY_FLAG_OPENED BIT(0)
+#define PHY_FLAG_ATTACHED BIT(1)
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+#define DMA_ADDR_HIGH32(dma_addr) ((u32)(((dma_addr) >> 32) & 0xFFFFFFFF))
+#else
+#define DMA_ADDR_HIGH32(dma_addr) ((u32)(0))
+#endif
+#define DMA_ADDR_LOW32(dma_addr) ((u32)((dma_addr) & 0xFFFFFFFF))
+#define DMA_DESCRIPTOR_SPACING_16 (16)
+#define DMA_DESCRIPTOR_SPACING_32 (32)
+#define DMA_DESCRIPTOR_SPACING_64 (64)
+#define DMA_DESCRIPTOR_SPACING_128 (128)
+#define DEFAULT_DMA_DESCRIPTOR_SPACING (L1_CACHE_BYTES)
+
+#define DMAC_CHANNEL_STATE_SET(start_bit, stop_bit) \
+ (((start_bit) ? 2 : 0) | ((stop_bit) ? 1 : 0))
+#define DMAC_CHANNEL_STATE_INITIAL DMAC_CHANNEL_STATE_SET(0, 0)
+#define DMAC_CHANNEL_STATE_STARTED DMAC_CHANNEL_STATE_SET(1, 0)
+#define DMAC_CHANNEL_STATE_STOP_PENDING DMAC_CHANNEL_STATE_SET(1, 1)
+#define DMAC_CHANNEL_STATE_STOPPED DMAC_CHANNEL_STATE_SET(0, 1)
+
+/* TX Descriptor bits */
+#define TX_DESC_DATA0_DTYPE_MASK_ (0xC0000000)
+#define TX_DESC_DATA0_DTYPE_DATA_ (0x00000000)
+#define TX_DESC_DATA0_DTYPE_EXT_ (0x40000000)
+#define TX_DESC_DATA0_FS_ (0x20000000)
+#define TX_DESC_DATA0_LS_ (0x10000000)
+#define TX_DESC_DATA0_EXT_ (0x08000000)
+#define TX_DESC_DATA0_IOC_ (0x04000000)
+#define TX_DESC_DATA0_ICE_ (0x00400000)
+#define TX_DESC_DATA0_IPE_ (0x00200000)
+#define TX_DESC_DATA0_TPE_ (0x00100000)
+#define TX_DESC_DATA0_FCS_ (0x00020000)
+#define TX_DESC_DATA0_BUF_LENGTH_MASK_ (0x0000FFFF)
+#define TX_DESC_DATA0_EXT_LSO_ (0x00200000)
+#define TX_DESC_DATA0_EXT_PAY_LENGTH_MASK_ (0x000FFFFF)
+#define TX_DESC_DATA3_FRAME_LENGTH_MSS_MASK_ (0x3FFF0000)
+
+struct lan743x_tx_descriptor {
+ u32 data0;
+ u32 data1;
+ u32 data2;
+ u32 data3;
+} __aligned(DEFAULT_DMA_DESCRIPTOR_SPACING);
+
+#define TX_BUFFER_INFO_FLAG_ACTIVE BIT(0)
+#define TX_BUFFER_INFO_FLAG_IGNORE_SYNC BIT(2)
+#define TX_BUFFER_INFO_FLAG_SKB_FRAGMENT BIT(3)
+struct lan743x_tx_buffer_info {
+ int flags;
+ struct sk_buff *skb;
+ dma_addr_t dma_ptr;
+ unsigned int buffer_length;
+};
+
+#define LAN743X_TX_RING_SIZE (50)
+
+/* OWN bit is set. ie, Descs are owned by RX DMAC */
+#define RX_DESC_DATA0_OWN_ (0x00008000)
+/* OWN bit is clear. ie, Descs are owned by host */
+#define RX_DESC_DATA0_FS_ (0x80000000)
+#define RX_DESC_DATA0_LS_ (0x40000000)
+#define RX_DESC_DATA0_FRAME_LENGTH_MASK_ (0x3FFF0000)
+#define RX_DESC_DATA0_FRAME_LENGTH_GET_(data0) \
+ (((data0) & RX_DESC_DATA0_FRAME_LENGTH_MASK_) >> 16)
+#define RX_DESC_DATA0_EXT_ (0x00004000)
+#define RX_DESC_DATA0_BUF_LENGTH_MASK_ (0x00003FFF)
+#define RX_DESC_DATA2_TS_NS_MASK_ (0x3FFFFFFF)
+
+#if ((NET_IP_ALIGN != 0) && (NET_IP_ALIGN != 2))
+#error NET_IP_ALIGN must be 0 or 2
+#endif
+
+#define RX_HEAD_PADDING NET_IP_ALIGN
+
+struct lan743x_rx_descriptor {
+ u32 data0;
+ u32 data1;
+ u32 data2;
+ u32 data3;
+} __aligned(DEFAULT_DMA_DESCRIPTOR_SPACING);
+
+#define RX_BUFFER_INFO_FLAG_ACTIVE BIT(0)
+struct lan743x_rx_buffer_info {
+ int flags;
+ struct sk_buff *skb;
+
+ dma_addr_t dma_ptr;
+ unsigned int buffer_length;
+};
+
+#define LAN743X_RX_RING_SIZE (65)
+
+#define RX_PROCESS_RESULT_NOTHING_TO_DO (0)
+#define RX_PROCESS_RESULT_PACKET_RECEIVED (1)
+#define RX_PROCESS_RESULT_PACKET_DROPPED (2)
+
+#endif /* _LAN743X_H */
projects / linux-2.6-microblaze.git / commitdiff