| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Bryan Whitehead | 14293 | 97.56% | 11 | 44.00% |
| Roelof Berg | 236 | 1.61% | 2 | 8.00% |
| Tim Harvey | 52 | 0.35% | 2 | 8.00% |
| Christophe Jaillet | 40 | 0.27% | 1 | 4.00% |
| Colin Ian King | 10 | 0.07% | 3 | 12.00% |
| Andrew Lunn | 10 | 0.07% | 2 | 8.00% |
| Matthew Wilcox | 4 | 0.03% | 1 | 4.00% |
| zhong jiang | 3 | 0.02% | 1 | 4.00% |
| Joe Perches | 1 | 0.01% | 1 | 4.00% |
| Wei Yongjun | 1 | 0.01% | 1 | 4.00% |
| Total | 14650 | 25 |
/* 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/of_mdio.h> #include <linux/of_net.h> #include <linux/phy.h> #include <linux/phy_fixed.h> #include <linux/rtnetlink.h> #include <linux/iopoll.h> #include <linux/crc16.h> #include "lan743x_main.h" #include "lan743x_ethtool.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 & INT_BIT_1588_) { lan743x_ptp_isr(adapter); int_sts &= ~INT_BIT_1588_; } } 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_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); /* 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; netdev = adapter->netdev; /* disable auto duplex, and speed detection. Phylib does that */ 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); if (!is_valid_ether_addr(adapter->mac_address)) { 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) eth_random_addr(adapter->mac_address); } lan743x_mac_set_address(adapter, adapter->mac_address); ether_addr_copy(netdev->dev_addr, adapter->mac_address); return 0; } static int lan743x_mac_open(struct lan743x_adapter *adapter) { int ret = 0; u32 temp; temp = lan743x_csr_read(adapter, MAC_RX); lan743x_csr_write(adapter, MAC_RX, temp | MAC_RX_RXEN_); temp = lan743x_csr_read(adapter, MAC_TX); lan743x_csr_write(adapter, MAC_TX, temp | MAC_TX_TXEN_); return ret; } static void lan743x_mac_close(struct lan743x_adapter *adapter) { u32 temp; temp = lan743x_csr_read(adapter, MAC_TX); temp &= ~MAC_TX_TXEN_; lan743x_csr_write(adapter, MAC_TX, temp); lan743x_csr_wait_for_bit(adapter, MAC_TX, MAC_TX_TXD_, 1, 1000, 20000, 100); temp = lan743x_csr_read(adapter, MAC_RX); temp &= ~MAC_RX_RXEN_; lan743x_csr_write(adapter, MAC_RX, temp); lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_, 1, 1000, 20000, 100); } static void lan743x_mac_flow_ctrl_set_enables(struct lan743x_adapter *adapter, bool tx_enable, bool rx_enable) { u32 flow_setting = 0; /* set maximum pause time because when fifo space frees * up a zero value pause frame will be sent to release the pause */ flow_setting = MAC_FLOW_CR_FCPT_MASK_; if (tx_enable) flow_setting |= MAC_FLOW_CR_TX_FCEN_; if (rx_enable) flow_setting |= MAC_FLOW_CR_RX_FCEN_; lan743x_csr_write(adapter, MAC_FLOW, flow_setting); } static int lan743x_mac_set_mtu(struct lan743x_adapter *adapter, int new_mtu) { int enabled = 0; u32 mac_rx = 0; mac_rx = lan743x_csr_read(adapter, MAC_RX); if (mac_rx & MAC_RX_RXEN_) { enabled = 1; if (mac_rx & MAC_RX_RXD_) { lan743x_csr_write(adapter, MAC_RX, mac_rx); mac_rx &= ~MAC_RX_RXD_; } mac_rx &= ~MAC_RX_RXEN_; lan743x_csr_write(adapter, MAC_RX, mac_rx); lan743x_csr_wait_for_bit(adapter, MAC_RX, MAC_RX_RXD_, 1, 1000, 20000, 100); lan743x_csr_write(adapter, MAC_RX, mac_rx | MAC_RX_RXD_); } mac_rx &= ~(MAC_RX_MAX_SIZE_MASK_); mac_rx |= (((new_mtu + ETH_HLEN + 4) << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_); lan743x_csr_write(adapter, MAC_RX, mac_rx); if (enabled) { mac_rx |= MAC_RX_RXEN_; lan743x_csr_write(adapter, MAC_RX, mac_rx); } return 0; } /* PHY */ static int lan743x_phy_reset(struct lan743x_adapter *adapter) { u32 data; /* Only called with in probe, and before mdiobus_register */ data = lan743x_csr_read(adapter, PMT_CTL); data |= PMT_CTL_ETH_PHY_RST_; lan743x_csr_write(adapter, PMT_CTL, data); return readx_poll_timeout(LAN743X_CSR_READ_OP, PMT_CTL, data, (!(data & PMT_CTL_ETH_PHY_RST_) && (data & PMT_CTL_READY_)), 50000, 1000000); } static void lan743x_phy_update_flowcontrol(struct lan743x_adapter *adapter, u8 duplex, u16 local_adv, u16 remote_adv) { struct lan743x_phy *phy = &adapter->phy; u8 cap; if (phy->fc_autoneg) cap = mii_resolve_flowctrl_fdx(local_adv, remote_adv); else cap = phy->fc_request_control; lan743x_mac_flow_ctrl_set_enables(adapter, cap & FLOW_CTRL_TX, cap & FLOW_CTRL_RX); } static int lan743x_phy_init(struct lan743x_adapter *adapter) { return lan743x_phy_reset(adapter); } static void lan743x_phy_link_status_change(struct net_device *netdev) { struct lan743x_adapter *adapter = netdev_priv(netdev); struct phy_device *phydev = netdev->phydev; u32 data; phy_print_status(phydev); if (phydev->state == PHY_RUNNING) { struct ethtool_link_ksettings ksettings; int remote_advertisement = 0; int local_advertisement = 0; data = lan743x_csr_read(adapter, MAC_CR); /* set interface mode */ if (phy_interface_mode_is_rgmii(adapter->phy_mode)) /* RGMII */ data &= ~MAC_CR_MII_EN_; else /* GMII */ data |= MAC_CR_MII_EN_; /* set duplex mode */ if (phydev->duplex) data |= MAC_CR_DPX_; else data &= ~MAC_CR_DPX_; /* set bus speed */ switch (phydev->speed) { case SPEED_10: data &= ~MAC_CR_CFG_H_; data &= ~MAC_CR_CFG_L_; break; case SPEED_100: data &= ~MAC_CR_CFG_H_; data |= MAC_CR_CFG_L_; break; case SPEED_1000: data |= MAC_CR_CFG_H_; data &= ~MAC_CR_CFG_L_; break; } lan743x_csr_write(adapter, MAC_CR, data); memset(&ksettings, 0, sizeof(ksettings)); phy_ethtool_get_link_ksettings(netdev, &ksettings); local_advertisement = linkmode_adv_to_mii_adv_t(phydev->advertising); remote_advertisement = linkmode_adv_to_mii_adv_t(phydev->lp_advertising); lan743x_phy_update_flowcontrol(adapter, ksettings.base.duplex, local_advertisement, remote_advertisement); lan743x_ptp_update_latency(adapter, ksettings.base.speed); } } 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 device_node *phynode; struct phy_device *phydev; struct net_device *netdev; int ret = -EIO; netdev = adapter->netdev; phynode = of_node_get(adapter->pdev->dev.of_node); adapter->phy_mode = PHY_INTERFACE_MODE_GMII; if (phynode) { of_get_phy_mode(phynode, &adapter->phy_mode); if (of_phy_is_fixed_link(phynode)) { ret = of_phy_register_fixed_link(phynode); if (ret) { netdev_err(netdev, "cannot register fixed PHY\n"); of_node_put(phynode); goto return_error; } } phydev = of_phy_connect(netdev, phynode, lan743x_phy_link_status_change, 0, adapter->phy_mode); of_node_put(phynode); if (!phydev) goto return_error; } else { phydev = phy_find_first(adapter->mdiobus); if (!phydev) goto return_error; ret = phy_connect_direct(netdev, phydev, lan743x_phy_link_status_change, adapter->phy_mode); if (ret) goto return_error; } /* MAC doesn't support 1000T Half */ phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); /* support both flow controls */ phy_support_asym_pause(phydev); phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX); phy->fc_autoneg = phydev->autoneg; phy_start(phydev); phy_start_aneg(phydev); return 0; return_error: return ret; } static void lan743x_rfe_open(struct lan743x_adapter *adapter) { lan743x_csr_write(adapter, RFE_RSS_CFG, RFE_RSS_CFG_UDP_IPV6_EX_ | RFE_RSS_CFG_TCP_IPV6_EX_ | RFE_RSS_CFG_IPV6_EX_ | RFE_RSS_CFG_UDP_IPV6_ | RFE_RSS_CFG_TCP_IPV6_ | RFE_RSS_CFG_IPV6_ | RFE_RSS_CFG_UDP_IPV4_ | RFE_RSS_CFG_TCP_IPV4_ | RFE_RSS_CFG_IPV4_ | RFE_RSS_CFG_VALID_HASH_BITS_ | RFE_RSS_CFG_RSS_QUEUE_ENABLE_ | RFE_RSS_CFG_RSS_HASH_STORE_ | RFE_RSS_CFG_RSS_ENABLE_); } 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; bool ignore_sync; 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) goto clear_active; if (!(buffer_info->flags & TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED)) { dev_kfree_skb(buffer_info->skb); goto clear_skb; } if (cleanup) { lan743x_ptp_unrequest_tx_timestamp(tx->adapter); dev_kfree_skb(buffer_info->skb); } else { ignore_sync = (buffer_info->flags & TX_BUFFER_INFO_FLAG_IGNORE_SYNC) != 0; lan743x_ptp_tx_timestamp_skb(tx->adapter, buffer_info->skb, ignore_sync); } clear_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; } void lan743x_tx_set_timestamping_mode(struct lan743x_tx *tx, bool enable_timestamping, bool enable_onestep_sync) { if (enable_timestamping) tx->ts_flags |= TX_TS_FLAG_TIMESTAMPING_ENABLED; else tx->ts_flags &= ~TX_TS_FLAG_TIMESTAMPING_ENABLED; if (enable_onestep_sync) tx->ts_flags |= TX_TS_FLAG_ONE_STEP_SYNC; else tx->ts_flags &= ~TX_TS_FLAG_ONE_STEP_SYNC; } static int lan743x_tx_frame_start(struct lan743x_tx *tx, unsigned char *first_buffer, unsigned int first_buffer_length, unsigned int frame_length, bool time_stamp, 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 (time_stamp) tx->frame_data0 |= TX_DESC_DATA0_TSE_; 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, int nr_frags) { /* 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_; if (nr_frags <= 0) { tx->frame_data0 |= TX_DESC_DATA0_LS_; tx->frame_data0 |= TX_DESC_DATA0_IOC_; } 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 skb_frag_t *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 time_stamp, 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 */ if ((tx->frame_data0 & TX_DESC_DATA0_DTYPE_MASK_) == TX_DESC_DATA0_DTYPE_DATA_) { 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 (time_stamp) buffer_info->flags |= TX_BUFFER_INFO_FLAG_TIMESTAMP_REQUESTED; 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 do_timestamp = false; 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 */ if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && (tx->ts_flags & TX_TS_FLAG_TIMESTAMPING_ENABLED) && (lan743x_ptp_request_tx_timestamp(tx->adapter))) { skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; do_timestamp = true; if (tx->ts_flags & TX_TS_FLAG_ONE_STEP_SYNC) ignore_sync = true; } 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, do_timestamp, skb->ip_summed == CHECKSUM_PARTIAL)) { dev_kfree_skb(skb); goto unlock; } if (gso) lan743x_tx_frame_add_lso(tx, frame_length, nr_frags); if (nr_frags <= 0) goto finish; for (j = 0; j < nr_frags; j++) { const skb_frag_t *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, do_timestamp, ignore_sync); unlock: spin_unlock_irqrestore(&tx->ring_lock, irq_flags); return NETDEV_TX_OK; } static int lan743x_tx_napi_poll(struct napi_struct *napi, int weight) { struct lan743x_tx *tx = container_of(napi, struct lan743x_tx, napi); struct lan743x_adapter *adapter = tx->adapter; bool start_transmitter = false; unsigned long irq_flags = 0; u32 ioc_bit = 0; u32 int_sts = 0; ioc_bit = DMAC_INT_BIT_TX_IOC_(tx->channel_number); int_sts = lan743x_csr_read(adapter, DMAC_INT_STS); if (tx->vector_flags & LAN743X_VECTOR_FLAG_SOURCE_STATUS_W2C) lan743x_csr_write(adapter, DMAC_INT_STS, ioc_bit); spin_lock_irqsave(&tx->ring_lock, irq_flags); /* clean up tx ring */ lan743x_tx_release_completed_descriptors(tx); if (netif_queue_stopped(adapter->netdev)) { if (tx->overflow_skb) { if (lan743x_tx_get_desc_cnt(tx, tx->overflow_skb) <= lan743x_tx_get_avail_desc(tx)) start_transmitter = true; } else { netif_wake_queue(adapter->netdev); } } spin_unlock_irqrestore(&tx->ring_lock, irq_flags); if (start_transmitter) { /* space is now available, transmit overflow skb */ lan743x_tx_xmit_frame(tx, tx->overflow_skb); tx->overflow_skb = NULL; netif_wake_queue(adapter->netdev); } if (!napi_complete(napi)) 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 0; } static void lan743x_tx_ring_cleanup(struct lan743x_tx *tx) { if (tx->head_cpu_ptr) { dma_free_coherent(&tx->adapter->pdev->dev, sizeof(*tx->head_cpu_ptr), 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) { dma_free_coherent(&tx->adapter->pdev->dev, 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 = dma_alloc_coherent(&tx->adapter->pdev->dev, ring_allocation_size, &dma_ptr, GFP_KERNEL); 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 = dma_alloc_coherent(&tx->adapter->pdev->dev, sizeof(*tx->head_cpu_ptr), &dma_ptr, GFP_KERNEL); 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_tx_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 struct sk_buff *lan743x_rx_allocate_skb(struct lan743x_rx *rx) { int length = 0; length = (LAN743X_MAX_FRAME_SIZE + ETH_HLEN + 4 + RX_HEAD_PADDING); return __netdev_alloc_skb(rx->adapter->netdev, length, GFP_ATOMIC | GFP_DMA); } static int lan743x_rx_init_ring_element(struct lan743x_rx *rx, int index, struct sk_buff *skb) { 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 = skb; 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; int current_head_index = *rx->head_cpu_ptr; struct lan743x_rx_buffer_info *buffer_info; struct lan743x_rx_descriptor *descriptor; int extension_index = -1; int first_index = -1; int last_index = -1; 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 */ struct sk_buff *new_skb = NULL; int packet_length; new_skb = lan743x_rx_allocate_skb(rx); if (!new_skb) { /* failed to allocate next skb. * Memory is very low. * Drop this packet and reuse buffer. */ lan743x_rx_reuse_ring_element(rx, first_index); goto process_extension; } 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_init_ring_element(rx, first_index, new_skb); } 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_reuse_ring_element(rx, index); index = lan743x_rx_next_index(rx, index); } } else { while ((index >= first_index) || (index <= last_index)) { lan743x_rx_reuse_ring_element(rx, index); index = lan743x_rx_next_index(rx, index); } } } process_extension: 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 = 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) { dma_free_coherent(&rx->adapter->pdev->dev, 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) { dma_free_coherent(&rx->adapter->pdev->dev, 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 = dma_alloc_coherent(&rx->adapter->pdev->dev, ring_allocation_size, &dma_ptr, GFP_KERNEL); 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 = dma_alloc_coherent(&rx->adapter->pdev->dev, sizeof(*rx->head_cpu_ptr), &dma_ptr, GFP_KERNEL); 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++) { struct sk_buff *new_skb = lan743x_rx_allocate_skb(rx); ret = lan743x_rx_init_ring_element(rx, index, new_skb); 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_ptp_close(adapter); 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; ret = lan743x_ptp_open(adapter); if (ret) goto close_phy; lan743x_rfe_open(adapter); 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_ptp_close(adapter); close_phy: 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; if (cmd == SIOCSHWTSTAMP) return lan743x_ptp_ioctl(netdev, ifr, cmd); 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_gpio_init(adapter); if (ret) return ret; ret = lan743x_mac_init(adapter); if (ret) return ret; ret = lan743x_phy_init(adapter); if (ret) return ret; ret = lan743x_ptp_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)); if ((adapter->csr.id_rev & ID_REV_ID_MASK_) == ID_REV_ID_LAN7430_) /* LAN7430 uses internal phy at address 1 */ 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; const void *mac_addr; 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; mac_addr = of_get_mac_address(pdev->dev.of_node); if (!IS_ERR(mac_addr)) ether_addr_copy(adapter->mac_address, mac_addr); 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->ethtool_ops = &lan743x_ethtool_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(); #ifdef CONFIG_PM pci_save_state(pdev); #endif /* clean up lan743x portion */ lan743x_hardware_cleanup(adapter); } #ifdef CONFIG_PM_SLEEP static u16 lan743x_pm_wakeframe_crc16(const u8 *buf, int len) { return bitrev16(crc16(0xFFFF, buf, len)); } static void lan743x_pm_set_wol(struct lan743x_adapter *adapter) { const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E }; const u8 ipv6_multicast[3] = { 0x33, 0x33 }; const u8 arp_type[2] = { 0x08, 0x06 }; int mask_index; u32 pmtctl; u32 wucsr; u32 macrx; u16 crc; for (mask_index = 0; mask_index < MAC_NUM_OF_WUF_CFG; mask_index++) lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), 0); /* clear wake settings */ pmtctl = lan743x_csr_read(adapter, PMT_CTL); pmtctl |= PMT_CTL_WUPS_MASK_; pmtctl &= ~(PMT_CTL_GPIO_WAKEUP_EN_ | PMT_CTL_EEE_WAKEUP_EN_ | PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_ | PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_ | PMT_CTL_ETH_PHY_WAKE_EN_); macrx = lan743x_csr_read(adapter, MAC_RX); wucsr = 0; mask_index = 0; pmtctl |= PMT_CTL_ETH_PHY_D3_COLD_OVR_ | PMT_CTL_ETH_PHY_D3_OVR_; if (adapter->wolopts & WAKE_PHY) { pmtctl |= PMT_CTL_ETH_PHY_EDPD_PLL_CTL_; pmtctl |= PMT_CTL_ETH_PHY_WAKE_EN_; } if (adapter->wolopts & WAKE_MAGIC) { wucsr |= MAC_WUCSR_MPEN_; macrx |= MAC_RX_RXEN_; pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; } if (adapter->wolopts & WAKE_UCAST) { wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_PFDA_EN_; macrx |= MAC_RX_RXEN_; pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; } if (adapter->wolopts & WAKE_BCAST) { wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_BCST_EN_; macrx |= MAC_RX_RXEN_; pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; } if (adapter->wolopts & WAKE_MCAST) { /* IPv4 multicast */ crc = lan743x_pm_wakeframe_crc16(ipv4_multicast, 3); lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ | (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | (crc & MAC_WUF_CFG_CRC16_MASK_)); lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 7); lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); mask_index++; /* IPv6 multicast */ crc = lan743x_pm_wakeframe_crc16(ipv6_multicast, 2); lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_MCAST_ | (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | (crc & MAC_WUF_CFG_CRC16_MASK_)); lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 3); lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); mask_index++; wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_; macrx |= MAC_RX_RXEN_; pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; } if (adapter->wolopts & WAKE_ARP) { /* set MAC_WUF_CFG & WUF_MASK * for packettype (offset 12,13) = ARP (0x0806) */ crc = lan743x_pm_wakeframe_crc16(arp_type, 2); lan743x_csr_write(adapter, MAC_WUF_CFG(mask_index), MAC_WUF_CFG_EN_ | MAC_WUF_CFG_TYPE_ALL_ | (0 << MAC_WUF_CFG_OFFSET_SHIFT_) | (crc & MAC_WUF_CFG_CRC16_MASK_)); lan743x_csr_write(adapter, MAC_WUF_MASK0(mask_index), 0x3000); lan743x_csr_write(adapter, MAC_WUF_MASK1(mask_index), 0); lan743x_csr_write(adapter, MAC_WUF_MASK2(mask_index), 0); lan743x_csr_write(adapter, MAC_WUF_MASK3(mask_index), 0); mask_index++; wucsr |= MAC_WUCSR_RFE_WAKE_EN_ | MAC_WUCSR_WAKE_EN_; macrx |= MAC_RX_RXEN_; pmtctl |= PMT_CTL_WOL_EN_ | PMT_CTL_MAC_D3_RX_CLK_OVR_; pmtctl |= PMT_CTL_RX_FCT_RFE_D3_CLK_OVR_; } lan743x_csr_write(adapter, MAC_WUCSR, wucsr); lan743x_csr_write(adapter, PMT_CTL, pmtctl); lan743x_csr_write(adapter, MAC_RX, macrx); } static int lan743x_pm_suspend(struct device *dev) { struct pci_dev *pdev = to_pci_dev(dev); struct net_device *netdev = pci_get_drvdata(pdev); struct lan743x_adapter *adapter = netdev_priv(netdev); int ret; lan743x_pcidev_shutdown(pdev); /* clear all wakes */ lan743x_csr_write(adapter, MAC_WUCSR, 0); lan743x_csr_write(adapter, MAC_WUCSR2, 0); lan743x_csr_write(adapter, MAC_WK_SRC, 0xFFFFFFFF); if (adapter->wolopts) lan743x_pm_set_wol(adapter); /* Host sets PME_En, put D3hot */ ret = pci_prepare_to_sleep(pdev); return 0; } static int lan743x_pm_resume(struct device *dev) { struct pci_dev *pdev = to_pci_dev(dev); struct net_device *netdev = pci_get_drvdata(pdev); struct lan743x_adapter *adapter = netdev_priv(netdev); int ret; pci_set_power_state(pdev, PCI_D0); pci_restore_state(pdev); pci_save_state(pdev); ret = lan743x_hardware_init(adapter, pdev); if (ret) { netif_err(adapter, probe, adapter->netdev, "lan743x_hardware_init returned %d\n", ret); } /* open netdev when netdev is at running state while resume. * For instance, it is true when system wakesup after pm-suspend * However, it is false when system wakes up after suspend GUI menu */ if (netif_running(netdev)) lan743x_netdev_open(netdev); netif_device_attach(netdev); return 0; } static const struct dev_pm_ops lan743x_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(lan743x_pm_suspend, lan743x_pm_resume) }; #endif /* CONFIG_PM_SLEEP */ static const struct pci_device_id lan743x_pcidev_tbl[] = { { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7430) }, { PCI_DEVICE(PCI_VENDOR_ID_SMSC, PCI_DEVICE_ID_SMSC_LAN7431) }, { 0, } }; MODULE_DEVICE_TABLE(pci, lan743x_pcidev_tbl); static struct pci_driver lan743x_pcidev_driver = { .name = DRIVER_NAME, .id_table = lan743x_pcidev_tbl, .probe = lan743x_pcidev_probe, .remove = lan743x_pcidev_remove, #ifdef CONFIG_PM_SLEEP .driver.pm = &lan743x_pm_ops, #endif .shutdown = lan743x_pcidev_shutdown, }; module_pci_driver(lan743x_pcidev_driver); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL");
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