From: Sergei Shtylyov Date: Wed, 10 Jun 2015 22:02:30 +0000 (+0300) Subject: Renesas Ethernet AVB PTP clock driver X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a0d2f20650e81407d8e51ad2cbdc492861c74e9c;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Renesas Ethernet AVB PTP clock driver Ethernet AVB device includes the gPTP timer, so we can implement a PTP clock driver. We're doing that in a separate file, with the main Ethernet driver calling the PTP driver's [de]initialization and interrupt handler functions. Unfortunately, the clock seems tightly coupled with the AVB-DMAC, so when that one leaves the operation mode, we have to unregister the PTP clock... :-( Based on the original patches by Masaru Nagai. Signed-off-by: Masaru Nagai Signed-off-by: Sergei Shtylyov Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/renesas/Makefile b/drivers/net/ethernet/renesas/Makefile index aa354a666fac..a05102a7df02 100644 --- a/drivers/net/ethernet/renesas/Makefile +++ b/drivers/net/ethernet/renesas/Makefile @@ -3,4 +3,7 @@ # obj-$(CONFIG_SH_ETH) += sh_eth.o + +ravb-objs := ravb_main.o ravb_ptp.o + obj-$(CONFIG_RAVB) += ravb.o diff --git a/drivers/net/ethernet/renesas/ravb.c b/drivers/net/ethernet/renesas/ravb.c deleted file mode 100644 index 1fa9be203790..000000000000 --- a/drivers/net/ethernet/renesas/ravb.c +++ /dev/null @@ -1,1801 +0,0 @@ -/* Renesas Ethernet AVB device driver - * - * Copyright (C) 2014-2015 Renesas Electronics Corporation - * Copyright (C) 2015 Renesas Solutions Corp. - * Copyright (C) 2015 Cogent Embedded, Inc. - * - * Based on the SuperH Ethernet driver - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License version 2, - * as published by the Free Software Foundation. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "ravb.h" - -#define RAVB_DEF_MSG_ENABLE \ - (NETIF_MSG_LINK | \ - NETIF_MSG_TIMER | \ - NETIF_MSG_RX_ERR | \ - NETIF_MSG_TX_ERR) - -static int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, - u32 value) -{ - int i; - - for (i = 0; i < 10000; i++) { - if ((ravb_read(ndev, reg) & mask) == value) - return 0; - udelay(10); - } - return -ETIMEDOUT; -} - -static int ravb_config(struct net_device *ndev) -{ - int error; - - /* Set config mode */ - ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG, - CCC); - /* Check if the operating mode is changed to the config mode */ - error = ravb_wait(ndev, CSR, CSR_OPS, CSR_OPS_CONFIG); - if (error) - netdev_err(ndev, "failed to switch device to config mode\n"); - - return error; -} - -static void ravb_set_duplex(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - u32 ecmr = ravb_read(ndev, ECMR); - - if (priv->duplex) /* Full */ - ecmr |= ECMR_DM; - else /* Half */ - ecmr &= ~ECMR_DM; - ravb_write(ndev, ecmr, ECMR); -} - -static void ravb_set_rate(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - - switch (priv->speed) { - case 100: /* 100BASE */ - ravb_write(ndev, GECMR_SPEED_100, GECMR); - break; - case 1000: /* 1000BASE */ - ravb_write(ndev, GECMR_SPEED_1000, GECMR); - break; - default: - break; - } -} - -static void ravb_set_buffer_align(struct sk_buff *skb) -{ - u32 reserve = (unsigned long)skb->data & (RAVB_ALIGN - 1); - - if (reserve) - skb_reserve(skb, RAVB_ALIGN - reserve); -} - -/* Get MAC address from the MAC address registers - * - * Ethernet AVB device doesn't have ROM for MAC address. - * This function gets the MAC address that was used by a bootloader. - */ -static void ravb_read_mac_address(struct net_device *ndev, const u8 *mac) -{ - if (mac) { - ether_addr_copy(ndev->dev_addr, mac); - } else { - ndev->dev_addr[0] = (ravb_read(ndev, MAHR) >> 24); - ndev->dev_addr[1] = (ravb_read(ndev, MAHR) >> 16) & 0xFF; - ndev->dev_addr[2] = (ravb_read(ndev, MAHR) >> 8) & 0xFF; - ndev->dev_addr[3] = (ravb_read(ndev, MAHR) >> 0) & 0xFF; - ndev->dev_addr[4] = (ravb_read(ndev, MALR) >> 8) & 0xFF; - ndev->dev_addr[5] = (ravb_read(ndev, MALR) >> 0) & 0xFF; - } -} - -static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set) -{ - struct ravb_private *priv = container_of(ctrl, struct ravb_private, - mdiobb); - u32 pir = ravb_read(priv->ndev, PIR); - - if (set) - pir |= mask; - else - pir &= ~mask; - ravb_write(priv->ndev, pir, PIR); -} - -/* MDC pin control */ -static void ravb_set_mdc(struct mdiobb_ctrl *ctrl, int level) -{ - ravb_mdio_ctrl(ctrl, PIR_MDC, level); -} - -/* Data I/O pin control */ -static void ravb_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output) -{ - ravb_mdio_ctrl(ctrl, PIR_MMD, output); -} - -/* Set data bit */ -static void ravb_set_mdio_data(struct mdiobb_ctrl *ctrl, int value) -{ - ravb_mdio_ctrl(ctrl, PIR_MDO, value); -} - -/* Get data bit */ -static int ravb_get_mdio_data(struct mdiobb_ctrl *ctrl) -{ - struct ravb_private *priv = container_of(ctrl, struct ravb_private, - mdiobb); - - return (ravb_read(priv->ndev, PIR) & PIR_MDI) != 0; -} - -/* MDIO bus control struct */ -static struct mdiobb_ops bb_ops = { - .owner = THIS_MODULE, - .set_mdc = ravb_set_mdc, - .set_mdio_dir = ravb_set_mdio_dir, - .set_mdio_data = ravb_set_mdio_data, - .get_mdio_data = ravb_get_mdio_data, -}; - -/* Free skb's and DMA buffers for Ethernet AVB */ -static void ravb_ring_free(struct net_device *ndev, int q) -{ - struct ravb_private *priv = netdev_priv(ndev); - int ring_size; - int i; - - /* Free RX skb ringbuffer */ - if (priv->rx_skb[q]) { - for (i = 0; i < priv->num_rx_ring[q]; i++) - dev_kfree_skb(priv->rx_skb[q][i]); - } - kfree(priv->rx_skb[q]); - priv->rx_skb[q] = NULL; - - /* Free TX skb ringbuffer */ - if (priv->tx_skb[q]) { - for (i = 0; i < priv->num_tx_ring[q]; i++) - dev_kfree_skb(priv->tx_skb[q][i]); - } - kfree(priv->tx_skb[q]); - priv->tx_skb[q] = NULL; - - /* Free aligned TX buffers */ - if (priv->tx_buffers[q]) { - for (i = 0; i < priv->num_tx_ring[q]; i++) - kfree(priv->tx_buffers[q][i]); - } - kfree(priv->tx_buffers[q]); - priv->tx_buffers[q] = NULL; - - if (priv->rx_ring[q]) { - ring_size = sizeof(struct ravb_ex_rx_desc) * - (priv->num_rx_ring[q] + 1); - dma_free_coherent(NULL, ring_size, priv->rx_ring[q], - priv->rx_desc_dma[q]); - priv->rx_ring[q] = NULL; - } - - if (priv->tx_ring[q]) { - ring_size = sizeof(struct ravb_tx_desc) * - (priv->num_tx_ring[q] + 1); - dma_free_coherent(NULL, ring_size, priv->tx_ring[q], - priv->tx_desc_dma[q]); - priv->tx_ring[q] = NULL; - } -} - -/* Format skb and descriptor buffer for Ethernet AVB */ -static void ravb_ring_format(struct net_device *ndev, int q) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct ravb_ex_rx_desc *rx_desc = NULL; - struct ravb_tx_desc *tx_desc = NULL; - struct ravb_desc *desc = NULL; - int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q]; - int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q]; - struct sk_buff *skb; - dma_addr_t dma_addr; - void *buffer; - int i; - - priv->cur_rx[q] = 0; - priv->cur_tx[q] = 0; - priv->dirty_rx[q] = 0; - priv->dirty_tx[q] = 0; - - memset(priv->rx_ring[q], 0, rx_ring_size); - /* Build RX ring buffer */ - for (i = 0; i < priv->num_rx_ring[q]; i++) { - priv->rx_skb[q][i] = NULL; - skb = netdev_alloc_skb(ndev, PKT_BUF_SZ + RAVB_ALIGN - 1); - if (!skb) - break; - ravb_set_buffer_align(skb); - /* RX descriptor */ - rx_desc = &priv->rx_ring[q][i]; - /* The size of the buffer should be on 16-byte boundary. */ - rx_desc->ds_cc = cpu_to_le16(ALIGN(PKT_BUF_SZ, 16)); - dma_addr = dma_map_single(&ndev->dev, skb->data, - ALIGN(PKT_BUF_SZ, 16), - DMA_FROM_DEVICE); - if (dma_mapping_error(&ndev->dev, dma_addr)) { - dev_kfree_skb(skb); - break; - } - priv->rx_skb[q][i] = skb; - rx_desc->dptr = cpu_to_le32(dma_addr); - rx_desc->die_dt = DT_FEMPTY; - } - rx_desc = &priv->rx_ring[q][i]; - rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]); - rx_desc->die_dt = DT_LINKFIX; /* type */ - priv->dirty_rx[q] = (u32)(i - priv->num_rx_ring[q]); - - memset(priv->tx_ring[q], 0, tx_ring_size); - /* Build TX ring buffer */ - for (i = 0; i < priv->num_tx_ring[q]; i++) { - priv->tx_skb[q][i] = NULL; - priv->tx_buffers[q][i] = NULL; - buffer = kmalloc(PKT_BUF_SZ + RAVB_ALIGN - 1, GFP_KERNEL); - if (!buffer) - break; - /* Aligned TX buffer */ - priv->tx_buffers[q][i] = buffer; - tx_desc = &priv->tx_ring[q][i]; - tx_desc->die_dt = DT_EEMPTY; - } - tx_desc = &priv->tx_ring[q][i]; - tx_desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]); - tx_desc->die_dt = DT_LINKFIX; /* type */ - - /* RX descriptor base address for best effort */ - desc = &priv->desc_bat[RX_QUEUE_OFFSET + q]; - desc->die_dt = DT_LINKFIX; /* type */ - desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]); - - /* TX descriptor base address for best effort */ - desc = &priv->desc_bat[q]; - desc->die_dt = DT_LINKFIX; /* type */ - desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]); -} - -/* Init skb and descriptor buffer for Ethernet AVB */ -static int ravb_ring_init(struct net_device *ndev, int q) -{ - struct ravb_private *priv = netdev_priv(ndev); - int ring_size; - - /* Allocate RX and TX skb rings */ - priv->rx_skb[q] = kcalloc(priv->num_rx_ring[q], - sizeof(*priv->rx_skb[q]), GFP_KERNEL); - priv->tx_skb[q] = kcalloc(priv->num_tx_ring[q], - sizeof(*priv->tx_skb[q]), GFP_KERNEL); - if (!priv->rx_skb[q] || !priv->tx_skb[q]) - goto error; - - /* Allocate rings for the aligned buffers */ - priv->tx_buffers[q] = kcalloc(priv->num_tx_ring[q], - sizeof(*priv->tx_buffers[q]), GFP_KERNEL); - if (!priv->tx_buffers[q]) - goto error; - - /* Allocate all RX descriptors. */ - ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1); - priv->rx_ring[q] = dma_alloc_coherent(NULL, ring_size, - &priv->rx_desc_dma[q], - GFP_KERNEL); - if (!priv->rx_ring[q]) - goto error; - - priv->dirty_rx[q] = 0; - - /* Allocate all TX descriptors. */ - ring_size = sizeof(struct ravb_tx_desc) * (priv->num_tx_ring[q] + 1); - priv->tx_ring[q] = dma_alloc_coherent(NULL, ring_size, - &priv->tx_desc_dma[q], - GFP_KERNEL); - if (!priv->tx_ring[q]) - goto error; - - return 0; - -error: - ravb_ring_free(ndev, q); - - return -ENOMEM; -} - -/* E-MAC init function */ -static void ravb_emac_init(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - u32 ecmr; - - /* Receive frame limit set register */ - ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR); - - /* PAUSE prohibition */ - ecmr = ravb_read(ndev, ECMR); - ecmr &= ECMR_DM; - ecmr |= ECMR_ZPF | (priv->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE; - ravb_write(ndev, ecmr, ECMR); - - ravb_set_rate(ndev); - - /* Set MAC address */ - ravb_write(ndev, - (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) | - (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR); - ravb_write(ndev, - (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR); - - ravb_write(ndev, 1, MPR); - - /* E-MAC status register clear */ - ravb_write(ndev, ECSR_ICD | ECSR_MPD, ECSR); - - /* E-MAC interrupt enable register */ - ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR); -} - -/* Device init function for Ethernet AVB */ -static int ravb_dmac_init(struct net_device *ndev) -{ - int error; - - /* Set CONFIG mode */ - error = ravb_config(ndev); - if (error) - return error; - - error = ravb_ring_init(ndev, RAVB_BE); - if (error) - return error; - error = ravb_ring_init(ndev, RAVB_NC); - if (error) { - ravb_ring_free(ndev, RAVB_BE); - return error; - } - - /* Descriptor format */ - ravb_ring_format(ndev, RAVB_BE); - ravb_ring_format(ndev, RAVB_NC); - -#if defined(__LITTLE_ENDIAN) - ravb_write(ndev, ravb_read(ndev, CCC) & ~CCC_BOC, CCC); -#else - ravb_write(ndev, ravb_read(ndev, CCC) | CCC_BOC, CCC); -#endif - - /* Set AVB RX */ - ravb_write(ndev, RCR_EFFS | RCR_ENCF | RCR_ETS0 | 0x18000000, RCR); - - /* Set FIFO size */ - ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00222200, TGC); - - /* Timestamp enable */ - ravb_write(ndev, TCCR_TFEN, TCCR); - - /* Interrupt enable: */ - /* Frame receive */ - ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0); - /* Receive FIFO full warning */ - ravb_write(ndev, RIC1_RFWE, RIC1); - /* Receive FIFO full error, descriptor empty */ - ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2); - /* Frame transmitted, timestamp FIFO updated */ - ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC); - - /* Setting the control will start the AVB-DMAC process. */ - ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_OPERATION, - CCC); - - return 0; -} - -/* Free TX skb function for AVB-IP */ -static int ravb_tx_free(struct net_device *ndev, int q) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct net_device_stats *stats = &priv->stats[q]; - struct ravb_tx_desc *desc; - int free_num = 0; - int entry = 0; - u32 size; - - for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) { - entry = priv->dirty_tx[q] % priv->num_tx_ring[q]; - desc = &priv->tx_ring[q][entry]; - if (desc->die_dt != DT_FEMPTY) - break; - /* Descriptor type must be checked before all other reads */ - dma_rmb(); - size = le16_to_cpu(desc->ds_tagl) & TX_DS; - /* Free the original skb. */ - if (priv->tx_skb[q][entry]) { - dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr), - size, DMA_TO_DEVICE); - dev_kfree_skb_any(priv->tx_skb[q][entry]); - priv->tx_skb[q][entry] = NULL; - free_num++; - } - stats->tx_packets++; - stats->tx_bytes += size; - desc->die_dt = DT_EEMPTY; - } - return free_num; -} - -static void ravb_get_tx_tstamp(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct ravb_tstamp_skb *ts_skb, *ts_skb2; - struct skb_shared_hwtstamps shhwtstamps; - struct sk_buff *skb; - struct timespec64 ts; - u16 tag, tfa_tag; - int count; - u32 tfa2; - - count = (ravb_read(ndev, TSR) & TSR_TFFL) >> 8; - while (count--) { - tfa2 = ravb_read(ndev, TFA2); - tfa_tag = (tfa2 & TFA2_TST) >> 16; - ts.tv_nsec = (u64)ravb_read(ndev, TFA0); - ts.tv_sec = ((u64)(tfa2 & TFA2_TSV) << 32) | - ravb_read(ndev, TFA1); - memset(&shhwtstamps, 0, sizeof(shhwtstamps)); - shhwtstamps.hwtstamp = timespec64_to_ktime(ts); - list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, - list) { - skb = ts_skb->skb; - tag = ts_skb->tag; - list_del(&ts_skb->list); - kfree(ts_skb); - if (tag == tfa_tag) { - skb_tstamp_tx(skb, &shhwtstamps); - break; - } - } - ravb_write(ndev, ravb_read(ndev, TCCR) | TCCR_TFR, TCCR); - } -} - -/* Packet receive function for Ethernet AVB */ -static bool ravb_rx(struct net_device *ndev, int *quota, int q) -{ - struct ravb_private *priv = netdev_priv(ndev); - int entry = priv->cur_rx[q] % priv->num_rx_ring[q]; - int boguscnt = (priv->dirty_rx[q] + priv->num_rx_ring[q]) - - priv->cur_rx[q]; - struct net_device_stats *stats = &priv->stats[q]; - struct ravb_ex_rx_desc *desc; - struct sk_buff *skb; - dma_addr_t dma_addr; - struct timespec64 ts; - u16 pkt_len = 0; - u8 desc_status; - int limit; - - boguscnt = min(boguscnt, *quota); - limit = boguscnt; - desc = &priv->rx_ring[q][entry]; - while (desc->die_dt != DT_FEMPTY) { - /* Descriptor type must be checked before all other reads */ - dma_rmb(); - desc_status = desc->msc; - pkt_len = le16_to_cpu(desc->ds_cc) & RX_DS; - - if (--boguscnt < 0) - break; - - if (desc_status & MSC_MC) - stats->multicast++; - - if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF | - MSC_CEEF)) { - stats->rx_errors++; - if (desc_status & MSC_CRC) - stats->rx_crc_errors++; - if (desc_status & MSC_RFE) - stats->rx_frame_errors++; - if (desc_status & (MSC_RTLF | MSC_RTSF)) - stats->rx_length_errors++; - if (desc_status & MSC_CEEF) - stats->rx_missed_errors++; - } else { - u32 get_ts = priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE; - - skb = priv->rx_skb[q][entry]; - priv->rx_skb[q][entry] = NULL; - dma_sync_single_for_cpu(&ndev->dev, - le32_to_cpu(desc->dptr), - ALIGN(PKT_BUF_SZ, 16), - DMA_FROM_DEVICE); - get_ts &= (q == RAVB_NC) ? - RAVB_RXTSTAMP_TYPE_V2_L2_EVENT : - ~RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; - if (get_ts) { - struct skb_shared_hwtstamps *shhwtstamps; - - shhwtstamps = skb_hwtstamps(skb); - memset(shhwtstamps, 0, sizeof(*shhwtstamps)); - ts.tv_sec = ((u64) le16_to_cpu(desc->ts_sh) << - 32) | le32_to_cpu(desc->ts_sl); - ts.tv_nsec = le32_to_cpu(desc->ts_n); - shhwtstamps->hwtstamp = timespec64_to_ktime(ts); - } - skb_put(skb, pkt_len); - skb->protocol = eth_type_trans(skb, ndev); - napi_gro_receive(&priv->napi[q], skb); - stats->rx_packets++; - stats->rx_bytes += pkt_len; - } - - entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q]; - desc = &priv->rx_ring[q][entry]; - } - - /* Refill the RX ring buffers. */ - for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) { - entry = priv->dirty_rx[q] % priv->num_rx_ring[q]; - desc = &priv->rx_ring[q][entry]; - /* The size of the buffer should be on 16-byte boundary. */ - desc->ds_cc = cpu_to_le16(ALIGN(PKT_BUF_SZ, 16)); - - if (!priv->rx_skb[q][entry]) { - skb = netdev_alloc_skb(ndev, - PKT_BUF_SZ + RAVB_ALIGN - 1); - if (!skb) - break; /* Better luck next round. */ - ravb_set_buffer_align(skb); - dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr), - ALIGN(PKT_BUF_SZ, 16), - DMA_FROM_DEVICE); - dma_addr = dma_map_single(&ndev->dev, skb->data, - le16_to_cpu(desc->ds_cc), - DMA_FROM_DEVICE); - skb_checksum_none_assert(skb); - if (dma_mapping_error(&ndev->dev, dma_addr)) { - dev_kfree_skb_any(skb); - break; - } - desc->dptr = cpu_to_le32(dma_addr); - priv->rx_skb[q][entry] = skb; - } - /* Descriptor type must be set after all the above writes */ - dma_wmb(); - desc->die_dt = DT_FEMPTY; - } - - *quota -= limit - (++boguscnt); - - return boguscnt <= 0; -} - -static void ravb_rcv_snd_disable(struct net_device *ndev) -{ - /* Disable TX and RX */ - ravb_write(ndev, ravb_read(ndev, ECMR) & ~(ECMR_RE | ECMR_TE), ECMR); -} - -static void ravb_rcv_snd_enable(struct net_device *ndev) -{ - /* Enable TX and RX */ - ravb_write(ndev, ravb_read(ndev, ECMR) | ECMR_RE | ECMR_TE, ECMR); -} - -/* function for waiting dma process finished */ -static int ravb_stop_dma(struct net_device *ndev) -{ - int error; - - /* Wait for stopping the hardware TX process */ - error = ravb_wait(ndev, TCCR, - TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3, 0); - if (error) - return error; - - error = ravb_wait(ndev, CSR, CSR_TPO0 | CSR_TPO1 | CSR_TPO2 | CSR_TPO3, - 0); - if (error) - return error; - - /* Stop the E-MAC's RX/TX processes. */ - ravb_rcv_snd_disable(ndev); - - /* Wait for stopping the RX DMA process */ - error = ravb_wait(ndev, CSR, CSR_RPO, 0); - if (error) - return error; - - /* Stop AVB-DMAC process */ - return ravb_config(ndev); -} - -/* E-MAC interrupt handler */ -static void ravb_emac_interrupt(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - u32 ecsr, psr; - - ecsr = ravb_read(ndev, ECSR); - ravb_write(ndev, ecsr, ECSR); /* clear interrupt */ - if (ecsr & ECSR_ICD) - ndev->stats.tx_carrier_errors++; - if (ecsr & ECSR_LCHNG) { - /* Link changed */ - if (priv->no_avb_link) - return; - psr = ravb_read(ndev, PSR); - if (priv->avb_link_active_low) - psr ^= PSR_LMON; - if (!(psr & PSR_LMON)) { - /* DIsable RX and TX */ - ravb_rcv_snd_disable(ndev); - } else { - /* Enable RX and TX */ - ravb_rcv_snd_enable(ndev); - } - } -} - -/* Error interrupt handler */ -static void ravb_error_interrupt(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - u32 eis, ris2; - - eis = ravb_read(ndev, EIS); - ravb_write(ndev, ~EIS_QFS, EIS); - if (eis & EIS_QFS) { - ris2 = ravb_read(ndev, RIS2); - ravb_write(ndev, ~(RIS2_QFF0 | RIS2_RFFF), RIS2); - - /* Receive Descriptor Empty int */ - if (ris2 & RIS2_QFF0) - priv->stats[RAVB_BE].rx_over_errors++; - - /* Receive Descriptor Empty int */ - if (ris2 & RIS2_QFF1) - priv->stats[RAVB_NC].rx_over_errors++; - - /* Receive FIFO Overflow int */ - if (ris2 & RIS2_RFFF) - priv->rx_fifo_errors++; - } -} - -static irqreturn_t ravb_interrupt(int irq, void *dev_id) -{ - struct net_device *ndev = dev_id; - struct ravb_private *priv = netdev_priv(ndev); - irqreturn_t result = IRQ_NONE; - u32 iss; - - spin_lock(&priv->lock); - /* Get interrupt status */ - iss = ravb_read(ndev, ISS); - - /* Received and transmitted interrupts */ - if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) { - u32 ris0 = ravb_read(ndev, RIS0); - u32 ric0 = ravb_read(ndev, RIC0); - u32 tis = ravb_read(ndev, TIS); - u32 tic = ravb_read(ndev, TIC); - int q; - - /* Timestamp updated */ - if (tis & TIS_TFUF) { - ravb_write(ndev, ~TIS_TFUF, TIS); - ravb_get_tx_tstamp(ndev); - result = IRQ_HANDLED; - } - - /* Network control and best effort queue RX/TX */ - for (q = RAVB_NC; q >= RAVB_BE; q--) { - if (((ris0 & ric0) & BIT(q)) || - ((tis & tic) & BIT(q))) { - if (napi_schedule_prep(&priv->napi[q])) { - /* Mask RX and TX interrupts */ - ravb_write(ndev, ric0 & ~BIT(q), RIC0); - ravb_write(ndev, tic & ~BIT(q), TIC); - __napi_schedule(&priv->napi[q]); - } else { - netdev_warn(ndev, - "ignoring interrupt, rx status 0x%08x, rx mask 0x%08x,\n", - ris0, ric0); - netdev_warn(ndev, - " tx status 0x%08x, tx mask 0x%08x.\n", - tis, tic); - } - result = IRQ_HANDLED; - } - } - } - - /* E-MAC status summary */ - if (iss & ISS_MS) { - ravb_emac_interrupt(ndev); - result = IRQ_HANDLED; - } - - /* Error status summary */ - if (iss & ISS_ES) { - ravb_error_interrupt(ndev); - result = IRQ_HANDLED; - } - - mmiowb(); - spin_unlock(&priv->lock); - return result; -} - -static int ravb_poll(struct napi_struct *napi, int budget) -{ - struct net_device *ndev = napi->dev; - struct ravb_private *priv = netdev_priv(ndev); - unsigned long flags; - int q = napi - priv->napi; - int mask = BIT(q); - int quota = budget; - u32 ris0, tis; - - for (;;) { - tis = ravb_read(ndev, TIS); - ris0 = ravb_read(ndev, RIS0); - if (!((ris0 & mask) || (tis & mask))) - break; - - /* Processing RX Descriptor Ring */ - if (ris0 & mask) { - /* Clear RX interrupt */ - ravb_write(ndev, ~mask, RIS0); - if (ravb_rx(ndev, "a, q)) - goto out; - } - /* Processing TX Descriptor Ring */ - if (tis & mask) { - spin_lock_irqsave(&priv->lock, flags); - /* Clear TX interrupt */ - ravb_write(ndev, ~mask, TIS); - ravb_tx_free(ndev, q); - netif_wake_subqueue(ndev, q); - mmiowb(); - spin_unlock_irqrestore(&priv->lock, flags); - } - } - - napi_complete(napi); - - /* Re-enable RX/TX interrupts */ - spin_lock_irqsave(&priv->lock, flags); - ravb_write(ndev, ravb_read(ndev, RIC0) | mask, RIC0); - ravb_write(ndev, ravb_read(ndev, TIC) | mask, TIC); - mmiowb(); - spin_unlock_irqrestore(&priv->lock, flags); - - /* Receive error message handling */ - priv->rx_over_errors = priv->stats[RAVB_BE].rx_over_errors; - priv->rx_over_errors += priv->stats[RAVB_NC].rx_over_errors; - if (priv->rx_over_errors != ndev->stats.rx_over_errors) { - ndev->stats.rx_over_errors = priv->rx_over_errors; - netif_err(priv, rx_err, ndev, "Receive Descriptor Empty\n"); - } - if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors) { - ndev->stats.rx_fifo_errors = priv->rx_fifo_errors; - netif_err(priv, rx_err, ndev, "Receive FIFO Overflow\n"); - } -out: - return budget - quota; -} - -/* PHY state control function */ -static void ravb_adjust_link(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct phy_device *phydev = priv->phydev; - bool new_state = false; - - if (phydev->link) { - if (phydev->duplex != priv->duplex) { - new_state = true; - priv->duplex = phydev->duplex; - ravb_set_duplex(ndev); - } - - if (phydev->speed != priv->speed) { - new_state = true; - priv->speed = phydev->speed; - ravb_set_rate(ndev); - } - if (!priv->link) { - ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_TXF, - ECMR); - new_state = true; - priv->link = phydev->link; - if (priv->no_avb_link) - ravb_rcv_snd_enable(ndev); - } - } else if (priv->link) { - new_state = true; - priv->link = 0; - priv->speed = 0; - priv->duplex = -1; - if (priv->no_avb_link) - ravb_rcv_snd_disable(ndev); - } - - if (new_state && netif_msg_link(priv)) - phy_print_status(phydev); -} - -/* PHY init function */ -static int ravb_phy_init(struct net_device *ndev) -{ - struct device_node *np = ndev->dev.parent->of_node; - struct ravb_private *priv = netdev_priv(ndev); - struct phy_device *phydev; - struct device_node *pn; - - priv->link = 0; - priv->speed = 0; - priv->duplex = -1; - - /* Try connecting to PHY */ - pn = of_parse_phandle(np, "phy-handle", 0); - phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0, - priv->phy_interface); - if (!phydev) { - netdev_err(ndev, "failed to connect PHY\n"); - return -ENOENT; - } - - netdev_info(ndev, "attached PHY %d (IRQ %d) to driver %s\n", - phydev->addr, phydev->irq, phydev->drv->name); - - priv->phydev = phydev; - - return 0; -} - -/* PHY control start function */ -static int ravb_phy_start(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - int error; - - error = ravb_phy_init(ndev); - if (error) - return error; - - phy_start(priv->phydev); - - return 0; -} - -static int ravb_get_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) -{ - struct ravb_private *priv = netdev_priv(ndev); - int error = -ENODEV; - unsigned long flags; - - if (priv->phydev) { - spin_lock_irqsave(&priv->lock, flags); - error = phy_ethtool_gset(priv->phydev, ecmd); - spin_unlock_irqrestore(&priv->lock, flags); - } - - return error; -} - -static int ravb_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) -{ - struct ravb_private *priv = netdev_priv(ndev); - unsigned long flags; - int error; - - if (!priv->phydev) - return -ENODEV; - - spin_lock_irqsave(&priv->lock, flags); - - /* Disable TX and RX */ - ravb_rcv_snd_disable(ndev); - - error = phy_ethtool_sset(priv->phydev, ecmd); - if (error) - goto error_exit; - - if (ecmd->duplex == DUPLEX_FULL) - priv->duplex = 1; - else - priv->duplex = 0; - - ravb_set_duplex(ndev); - -error_exit: - mdelay(1); - - /* Enable TX and RX */ - ravb_rcv_snd_enable(ndev); - - mmiowb(); - spin_unlock_irqrestore(&priv->lock, flags); - - return error; -} - -static int ravb_nway_reset(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - int error = -ENODEV; - unsigned long flags; - - if (priv->phydev) { - spin_lock_irqsave(&priv->lock, flags); - error = phy_start_aneg(priv->phydev); - spin_unlock_irqrestore(&priv->lock, flags); - } - - return error; -} - -static u32 ravb_get_msglevel(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - - return priv->msg_enable; -} - -static void ravb_set_msglevel(struct net_device *ndev, u32 value) -{ - struct ravb_private *priv = netdev_priv(ndev); - - priv->msg_enable = value; -} - -static const char ravb_gstrings_stats[][ETH_GSTRING_LEN] = { - "rx_queue_0_current", - "tx_queue_0_current", - "rx_queue_0_dirty", - "tx_queue_0_dirty", - "rx_queue_0_packets", - "tx_queue_0_packets", - "rx_queue_0_bytes", - "tx_queue_0_bytes", - "rx_queue_0_mcast_packets", - "rx_queue_0_errors", - "rx_queue_0_crc_errors", - "rx_queue_0_frame_errors", - "rx_queue_0_length_errors", - "rx_queue_0_missed_errors", - "rx_queue_0_over_errors", - - "rx_queue_1_current", - "tx_queue_1_current", - "rx_queue_1_dirty", - "tx_queue_1_dirty", - "rx_queue_1_packets", - "tx_queue_1_packets", - "rx_queue_1_bytes", - "tx_queue_1_bytes", - "rx_queue_1_mcast_packets", - "rx_queue_1_errors", - "rx_queue_1_crc_errors", - "rx_queue_1_frame_errors_", - "rx_queue_1_length_errors", - "rx_queue_1_missed_errors", - "rx_queue_1_over_errors", -}; - -#define RAVB_STATS_LEN ARRAY_SIZE(ravb_gstrings_stats) - -static int ravb_get_sset_count(struct net_device *netdev, int sset) -{ - switch (sset) { - case ETH_SS_STATS: - return RAVB_STATS_LEN; - default: - return -EOPNOTSUPP; - } -} - -static void ravb_get_ethtool_stats(struct net_device *ndev, - struct ethtool_stats *stats, u64 *data) -{ - struct ravb_private *priv = netdev_priv(ndev); - int i = 0; - int q; - - /* Device-specific stats */ - for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { - struct net_device_stats *stats = &priv->stats[q]; - - data[i++] = priv->cur_rx[q]; - data[i++] = priv->cur_tx[q]; - data[i++] = priv->dirty_rx[q]; - data[i++] = priv->dirty_tx[q]; - data[i++] = stats->rx_packets; - data[i++] = stats->tx_packets; - data[i++] = stats->rx_bytes; - data[i++] = stats->tx_bytes; - data[i++] = stats->multicast; - data[i++] = stats->rx_errors; - data[i++] = stats->rx_crc_errors; - data[i++] = stats->rx_frame_errors; - data[i++] = stats->rx_length_errors; - data[i++] = stats->rx_missed_errors; - data[i++] = stats->rx_over_errors; - } -} - -static void ravb_get_strings(struct net_device *ndev, u32 stringset, u8 *data) -{ - switch (stringset) { - case ETH_SS_STATS: - memcpy(data, *ravb_gstrings_stats, sizeof(ravb_gstrings_stats)); - break; - } -} - -static void ravb_get_ringparam(struct net_device *ndev, - struct ethtool_ringparam *ring) -{ - struct ravb_private *priv = netdev_priv(ndev); - - ring->rx_max_pending = BE_RX_RING_MAX; - ring->tx_max_pending = BE_TX_RING_MAX; - ring->rx_pending = priv->num_rx_ring[RAVB_BE]; - ring->tx_pending = priv->num_tx_ring[RAVB_BE]; -} - -static int ravb_set_ringparam(struct net_device *ndev, - struct ethtool_ringparam *ring) -{ - struct ravb_private *priv = netdev_priv(ndev); - int error; - - if (ring->tx_pending > BE_TX_RING_MAX || - ring->rx_pending > BE_RX_RING_MAX || - ring->tx_pending < BE_TX_RING_MIN || - ring->rx_pending < BE_RX_RING_MIN) - return -EINVAL; - if (ring->rx_mini_pending || ring->rx_jumbo_pending) - return -EINVAL; - - if (netif_running(ndev)) { - netif_device_detach(ndev); - /* Wait for DMA stopping */ - error = ravb_stop_dma(ndev); - if (error) { - netdev_err(ndev, - "cannot set ringparam! Any AVB processes are still running?\n"); - return error; - } - synchronize_irq(ndev->irq); - - /* Free all the skb's in the RX queue and the DMA buffers. */ - ravb_ring_free(ndev, RAVB_BE); - ravb_ring_free(ndev, RAVB_NC); - } - - /* Set new parameters */ - priv->num_rx_ring[RAVB_BE] = ring->rx_pending; - priv->num_tx_ring[RAVB_BE] = ring->tx_pending; - - if (netif_running(ndev)) { - error = ravb_dmac_init(ndev); - if (error) { - netdev_err(ndev, - "%s: ravb_dmac_init() failed, error %d\n", - __func__, error); - return error; - } - - ravb_emac_init(ndev); - - netif_device_attach(ndev); - } - - return 0; -} - -static int ravb_get_ts_info(struct net_device *ndev, - struct ethtool_ts_info *info) -{ - info->so_timestamping = - SOF_TIMESTAMPING_TX_SOFTWARE | - SOF_TIMESTAMPING_RX_SOFTWARE | - SOF_TIMESTAMPING_SOFTWARE | - SOF_TIMESTAMPING_TX_HARDWARE | - SOF_TIMESTAMPING_RX_HARDWARE | - SOF_TIMESTAMPING_RAW_HARDWARE; - info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON); - info->rx_filters = - (1 << HWTSTAMP_FILTER_NONE) | - (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | - (1 << HWTSTAMP_FILTER_ALL); - info->phc_index = -1; - - return 0; -} - -static const struct ethtool_ops ravb_ethtool_ops = { - .get_settings = ravb_get_settings, - .set_settings = ravb_set_settings, - .nway_reset = ravb_nway_reset, - .get_msglevel = ravb_get_msglevel, - .set_msglevel = ravb_set_msglevel, - .get_link = ethtool_op_get_link, - .get_strings = ravb_get_strings, - .get_ethtool_stats = ravb_get_ethtool_stats, - .get_sset_count = ravb_get_sset_count, - .get_ringparam = ravb_get_ringparam, - .set_ringparam = ravb_set_ringparam, - .get_ts_info = ravb_get_ts_info, -}; - -/* Network device open function for Ethernet AVB */ -static int ravb_open(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - int error; - - napi_enable(&priv->napi[RAVB_BE]); - napi_enable(&priv->napi[RAVB_NC]); - - error = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED, ndev->name, - ndev); - if (error) { - netdev_err(ndev, "cannot request IRQ\n"); - goto out_napi_off; - } - - /* Device init */ - error = ravb_dmac_init(ndev); - if (error) - goto out_free_irq; - ravb_emac_init(ndev); - - netif_tx_start_all_queues(ndev); - - /* PHY control start */ - error = ravb_phy_start(ndev); - if (error) - goto out_free_irq; - - return 0; - -out_free_irq: - free_irq(ndev->irq, ndev); -out_napi_off: - napi_disable(&priv->napi[RAVB_NC]); - napi_disable(&priv->napi[RAVB_BE]); - return error; -} - -/* Timeout function for Ethernet AVB */ -static void ravb_tx_timeout(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - - netif_err(priv, tx_err, ndev, - "transmit timed out, status %08x, resetting...\n", - ravb_read(ndev, ISS)); - - /* tx_errors count up */ - ndev->stats.tx_errors++; - - schedule_work(&priv->work); -} - -static void ravb_tx_timeout_work(struct work_struct *work) -{ - struct ravb_private *priv = container_of(work, struct ravb_private, - work); - struct net_device *ndev = priv->ndev; - - netif_tx_stop_all_queues(ndev); - - /* Wait for DMA stopping */ - ravb_stop_dma(ndev); - - ravb_ring_free(ndev, RAVB_BE); - ravb_ring_free(ndev, RAVB_NC); - - /* Device init */ - ravb_dmac_init(ndev); - ravb_emac_init(ndev); - - netif_tx_start_all_queues(ndev); -} - -/* Packet transmit function for Ethernet AVB */ -static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct ravb_tstamp_skb *ts_skb = NULL; - u16 q = skb_get_queue_mapping(skb); - struct ravb_tx_desc *desc; - unsigned long flags; - u32 dma_addr; - void *buffer; - u32 entry; - u32 tccr; - - spin_lock_irqsave(&priv->lock, flags); - if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q]) { - netif_err(priv, tx_queued, ndev, - "still transmitting with the full ring!\n"); - netif_stop_subqueue(ndev, q); - spin_unlock_irqrestore(&priv->lock, flags); - return NETDEV_TX_BUSY; - } - entry = priv->cur_tx[q] % priv->num_tx_ring[q]; - priv->tx_skb[q][entry] = skb; - - if (skb_put_padto(skb, ETH_ZLEN)) - goto drop; - - buffer = PTR_ALIGN(priv->tx_buffers[q][entry], RAVB_ALIGN); - memcpy(buffer, skb->data, skb->len); - desc = &priv->tx_ring[q][entry]; - desc->ds_tagl = cpu_to_le16(skb->len); - dma_addr = dma_map_single(&ndev->dev, buffer, skb->len, DMA_TO_DEVICE); - if (dma_mapping_error(&ndev->dev, dma_addr)) - goto drop; - desc->dptr = cpu_to_le32(dma_addr); - - /* TX timestamp required */ - if (q == RAVB_NC) { - ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC); - if (!ts_skb) { - dma_unmap_single(&ndev->dev, dma_addr, skb->len, - DMA_TO_DEVICE); - goto drop; - } - ts_skb->skb = skb; - ts_skb->tag = priv->ts_skb_tag++; - priv->ts_skb_tag &= 0x3ff; - list_add_tail(&ts_skb->list, &priv->ts_skb_list); - - /* TAG and timestamp required flag */ - skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; - skb_tx_timestamp(skb); - desc->tagh_tsr = (ts_skb->tag >> 4) | TX_TSR; - desc->ds_tagl |= le16_to_cpu(ts_skb->tag << 12); - } - - /* Descriptor type must be set after all the above writes */ - dma_wmb(); - desc->die_dt = DT_FSINGLE; - - tccr = ravb_read(ndev, TCCR); - if (!(tccr & (TCCR_TSRQ0 << q))) - ravb_write(ndev, tccr | (TCCR_TSRQ0 << q), TCCR); - - priv->cur_tx[q]++; - if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q] && - !ravb_tx_free(ndev, q)) - netif_stop_subqueue(ndev, q); - -exit: - mmiowb(); - spin_unlock_irqrestore(&priv->lock, flags); - return NETDEV_TX_OK; - -drop: - dev_kfree_skb_any(skb); - priv->tx_skb[q][entry] = NULL; - goto exit; -} - -static u16 ravb_select_queue(struct net_device *ndev, struct sk_buff *skb, - void *accel_priv, select_queue_fallback_t fallback) -{ - /* If skb needs TX timestamp, it is handled in network control queue */ - return (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ? RAVB_NC : - RAVB_BE; - -} - -static struct net_device_stats *ravb_get_stats(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct net_device_stats *nstats, *stats0, *stats1; - - nstats = &ndev->stats; - stats0 = &priv->stats[RAVB_BE]; - stats1 = &priv->stats[RAVB_NC]; - - nstats->tx_dropped += ravb_read(ndev, TROCR); - ravb_write(ndev, 0, TROCR); /* (write clear) */ - nstats->collisions += ravb_read(ndev, CDCR); - ravb_write(ndev, 0, CDCR); /* (write clear) */ - nstats->tx_carrier_errors += ravb_read(ndev, LCCR); - ravb_write(ndev, 0, LCCR); /* (write clear) */ - - nstats->tx_carrier_errors += ravb_read(ndev, CERCR); - ravb_write(ndev, 0, CERCR); /* (write clear) */ - nstats->tx_carrier_errors += ravb_read(ndev, CEECR); - ravb_write(ndev, 0, CEECR); /* (write clear) */ - - nstats->rx_packets = stats0->rx_packets + stats1->rx_packets; - nstats->tx_packets = stats0->tx_packets + stats1->tx_packets; - nstats->rx_bytes = stats0->rx_bytes + stats1->rx_bytes; - nstats->tx_bytes = stats0->tx_bytes + stats1->tx_bytes; - nstats->multicast = stats0->multicast + stats1->multicast; - nstats->rx_errors = stats0->rx_errors + stats1->rx_errors; - nstats->rx_crc_errors = stats0->rx_crc_errors + stats1->rx_crc_errors; - nstats->rx_frame_errors = - stats0->rx_frame_errors + stats1->rx_frame_errors; - nstats->rx_length_errors = - stats0->rx_length_errors + stats1->rx_length_errors; - nstats->rx_missed_errors = - stats0->rx_missed_errors + stats1->rx_missed_errors; - nstats->rx_over_errors = - stats0->rx_over_errors + stats1->rx_over_errors; - - return nstats; -} - -/* Update promiscuous bit */ -static void ravb_set_rx_mode(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - unsigned long flags; - u32 ecmr; - - spin_lock_irqsave(&priv->lock, flags); - ecmr = ravb_read(ndev, ECMR); - if (ndev->flags & IFF_PROMISC) - ecmr |= ECMR_PRM; - else - ecmr &= ~ECMR_PRM; - ravb_write(ndev, ecmr, ECMR); - mmiowb(); - spin_unlock_irqrestore(&priv->lock, flags); -} - -/* Device close function for Ethernet AVB */ -static int ravb_close(struct net_device *ndev) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct ravb_tstamp_skb *ts_skb, *ts_skb2; - - netif_tx_stop_all_queues(ndev); - - /* Disable interrupts by clearing the interrupt masks. */ - ravb_write(ndev, 0, RIC0); - ravb_write(ndev, 0, RIC1); - ravb_write(ndev, 0, RIC2); - ravb_write(ndev, 0, TIC); - - /* Set the config mode to stop the AVB-DMAC's processes */ - if (ravb_stop_dma(ndev) < 0) - netdev_err(ndev, - "device will be stopped after h/w processes are done.\n"); - - /* Clear the timestamp list */ - list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, list) { - list_del(&ts_skb->list); - kfree(ts_skb); - } - - /* PHY disconnect */ - if (priv->phydev) { - phy_stop(priv->phydev); - phy_disconnect(priv->phydev); - priv->phydev = NULL; - } - - free_irq(ndev->irq, ndev); - - napi_disable(&priv->napi[RAVB_NC]); - napi_disable(&priv->napi[RAVB_BE]); - - /* Free all the skb's in the RX queue and the DMA buffers. */ - ravb_ring_free(ndev, RAVB_BE); - ravb_ring_free(ndev, RAVB_NC); - - return 0; -} - -static int ravb_hwtstamp_get(struct net_device *ndev, struct ifreq *req) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct hwtstamp_config config; - - config.flags = 0; - config.tx_type = priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON : - HWTSTAMP_TX_OFF; - if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_V2_L2_EVENT) - config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; - else if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_ALL) - config.rx_filter = HWTSTAMP_FILTER_ALL; - else - config.rx_filter = HWTSTAMP_FILTER_NONE; - - return copy_to_user(req->ifr_data, &config, sizeof(config)) ? - -EFAULT : 0; -} - -/* Control hardware time stamping */ -static int ravb_hwtstamp_set(struct net_device *ndev, struct ifreq *req) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct hwtstamp_config config; - u32 tstamp_rx_ctrl = RAVB_RXTSTAMP_ENABLED; - u32 tstamp_tx_ctrl; - - if (copy_from_user(&config, req->ifr_data, sizeof(config))) - return -EFAULT; - - /* Reserved for future extensions */ - if (config.flags) - return -EINVAL; - - switch (config.tx_type) { - case HWTSTAMP_TX_OFF: - tstamp_tx_ctrl = 0; - break; - case HWTSTAMP_TX_ON: - tstamp_tx_ctrl = RAVB_TXTSTAMP_ENABLED; - break; - default: - return -ERANGE; - } - - switch (config.rx_filter) { - case HWTSTAMP_FILTER_NONE: - tstamp_rx_ctrl = 0; - break; - case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: - tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; - break; - default: - config.rx_filter = HWTSTAMP_FILTER_ALL; - tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_ALL; - } - - priv->tstamp_tx_ctrl = tstamp_tx_ctrl; - priv->tstamp_rx_ctrl = tstamp_rx_ctrl; - - return copy_to_user(req->ifr_data, &config, sizeof(config)) ? - -EFAULT : 0; -} - -/* ioctl to device function */ -static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) -{ - struct ravb_private *priv = netdev_priv(ndev); - struct phy_device *phydev = priv->phydev; - - if (!netif_running(ndev)) - return -EINVAL; - - if (!phydev) - return -ENODEV; - - switch (cmd) { - case SIOCGHWTSTAMP: - return ravb_hwtstamp_get(ndev, req); - case SIOCSHWTSTAMP: - return ravb_hwtstamp_set(ndev, req); - } - - return phy_mii_ioctl(phydev, req, cmd); -} - -static const struct net_device_ops ravb_netdev_ops = { - .ndo_open = ravb_open, - .ndo_stop = ravb_close, - .ndo_start_xmit = ravb_start_xmit, - .ndo_select_queue = ravb_select_queue, - .ndo_get_stats = ravb_get_stats, - .ndo_set_rx_mode = ravb_set_rx_mode, - .ndo_tx_timeout = ravb_tx_timeout, - .ndo_do_ioctl = ravb_do_ioctl, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = eth_mac_addr, - .ndo_change_mtu = eth_change_mtu, -}; - -/* MDIO bus init function */ -static int ravb_mdio_init(struct ravb_private *priv) -{ - struct platform_device *pdev = priv->pdev; - struct device *dev = &pdev->dev; - int error; - - /* Bitbang init */ - priv->mdiobb.ops = &bb_ops; - - /* MII controller setting */ - priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb); - if (!priv->mii_bus) - return -ENOMEM; - - /* Hook up MII support for ethtool */ - priv->mii_bus->name = "ravb_mii"; - priv->mii_bus->parent = dev; - snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", - pdev->name, pdev->id); - - /* Register MDIO bus */ - error = of_mdiobus_register(priv->mii_bus, dev->of_node); - if (error) - goto out_free_bus; - - return 0; - -out_free_bus: - free_mdio_bitbang(priv->mii_bus); - return error; -} - -/* MDIO bus release function */ -static int ravb_mdio_release(struct ravb_private *priv) -{ - /* Unregister mdio bus */ - mdiobus_unregister(priv->mii_bus); - - /* Free bitbang info */ - free_mdio_bitbang(priv->mii_bus); - - return 0; -} - -static int ravb_probe(struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - struct ravb_private *priv; - struct net_device *ndev; - int error, irq, q; - struct resource *res; - - if (!np) { - dev_err(&pdev->dev, - "this driver is required to be instantiated from device tree\n"); - return -EINVAL; - } - - /* Get base address */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "invalid resource\n"); - return -EINVAL; - } - - ndev = alloc_etherdev_mqs(sizeof(struct ravb_private), - NUM_TX_QUEUE, NUM_RX_QUEUE); - if (!ndev) - return -ENOMEM; - - pm_runtime_enable(&pdev->dev); - pm_runtime_get_sync(&pdev->dev); - - /* The Ether-specific entries in the device structure. */ - ndev->base_addr = res->start; - ndev->dma = -1; - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - error = -ENODEV; - goto out_release; - } - ndev->irq = irq; - - SET_NETDEV_DEV(ndev, &pdev->dev); - - priv = netdev_priv(ndev); - priv->ndev = ndev; - priv->pdev = pdev; - priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE; - priv->num_rx_ring[RAVB_BE] = BE_RX_RING_SIZE; - priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE; - priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE; - priv->addr = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(priv->addr)) { - error = PTR_ERR(priv->addr); - goto out_release; - } - - spin_lock_init(&priv->lock); - INIT_WORK(&priv->work, ravb_tx_timeout_work); - - priv->phy_interface = of_get_phy_mode(np); - - priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link"); - priv->avb_link_active_low = - of_property_read_bool(np, "renesas,ether-link-active-low"); - - /* Set function */ - ndev->netdev_ops = &ravb_netdev_ops; - ndev->ethtool_ops = &ravb_ethtool_ops; - - /* Set AVB config mode */ - ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG, - CCC); - - /* Set CSEL value */ - ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_CSEL) | CCC_CSEL_HPB, - CCC); - - /* Set GTI value */ - ravb_write(ndev, ((1000 << 20) / 130) & GTI_TIV, GTI); - - /* Request GTI loading */ - ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTI, GCCR); - - /* Allocate descriptor base address table */ - priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM; - priv->desc_bat = dma_alloc_coherent(NULL, priv->desc_bat_size, - &priv->desc_bat_dma, GFP_KERNEL); - if (!priv->desc_bat) { - dev_err(&ndev->dev, - "Cannot allocate desc base address table (size %d bytes)\n", - priv->desc_bat_size); - error = -ENOMEM; - goto out_release; - } - for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++) - priv->desc_bat[q].die_dt = DT_EOS; - ravb_write(ndev, priv->desc_bat_dma, DBAT); - - /* Initialise HW timestamp list */ - INIT_LIST_HEAD(&priv->ts_skb_list); - - /* Debug message level */ - priv->msg_enable = RAVB_DEF_MSG_ENABLE; - - /* Read and set MAC address */ - ravb_read_mac_address(ndev, of_get_mac_address(np)); - if (!is_valid_ether_addr(ndev->dev_addr)) { - dev_warn(&pdev->dev, - "no valid MAC address supplied, using a random one\n"); - eth_hw_addr_random(ndev); - } - - /* MDIO bus init */ - error = ravb_mdio_init(priv); - if (error) { - dev_err(&ndev->dev, "failed to initialize MDIO\n"); - goto out_dma_free; - } - - netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll, 64); - netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll, 64); - - /* Network device register */ - error = register_netdev(ndev); - if (error) - goto out_napi_del; - - /* Print device information */ - netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n", - (u32)ndev->base_addr, ndev->dev_addr, ndev->irq); - - platform_set_drvdata(pdev, ndev); - - return 0; - -out_napi_del: - netif_napi_del(&priv->napi[RAVB_NC]); - netif_napi_del(&priv->napi[RAVB_BE]); - ravb_mdio_release(priv); -out_dma_free: - dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat, - priv->desc_bat_dma); -out_release: - if (ndev) - free_netdev(ndev); - - pm_runtime_put(&pdev->dev); - pm_runtime_disable(&pdev->dev); - return error; -} - -static int ravb_remove(struct platform_device *pdev) -{ - struct net_device *ndev = platform_get_drvdata(pdev); - struct ravb_private *priv = netdev_priv(ndev); - - dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat, - priv->desc_bat_dma); - /* Set reset mode */ - ravb_write(ndev, CCC_OPC_RESET, CCC); - pm_runtime_put_sync(&pdev->dev); - unregister_netdev(ndev); - netif_napi_del(&priv->napi[RAVB_NC]); - netif_napi_del(&priv->napi[RAVB_BE]); - ravb_mdio_release(priv); - pm_runtime_disable(&pdev->dev); - free_netdev(ndev); - platform_set_drvdata(pdev, NULL); - - return 0; -} - -#ifdef CONFIG_PM -static int ravb_runtime_nop(struct device *dev) -{ - /* Runtime PM callback shared between ->runtime_suspend() - * and ->runtime_resume(). Simply returns success. - * - * This driver re-initializes all registers after - * pm_runtime_get_sync() anyway so there is no need - * to save and restore registers here. - */ - return 0; -} - -static const struct dev_pm_ops ravb_dev_pm_ops = { - .runtime_suspend = ravb_runtime_nop, - .runtime_resume = ravb_runtime_nop, -}; - -#define RAVB_PM_OPS (&ravb_dev_pm_ops) -#else -#define RAVB_PM_OPS NULL -#endif - -static const struct of_device_id ravb_match_table[] = { - { .compatible = "renesas,etheravb-r8a7790" }, - { .compatible = "renesas,etheravb-r8a7794" }, - { } -}; -MODULE_DEVICE_TABLE(of, ravb_match_table); - -static struct platform_driver ravb_driver = { - .probe = ravb_probe, - .remove = ravb_remove, - .driver = { - .name = "ravb", - .pm = RAVB_PM_OPS, - .of_match_table = ravb_match_table, - }, -}; - -module_platform_driver(ravb_driver); - -MODULE_AUTHOR("Mitsuhiro Kimura, Masaru Nagai"); -MODULE_DESCRIPTION("Renesas Ethernet AVB driver"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h index f2656ebba084..8aa50ac4e2d6 100644 --- a/drivers/net/ethernet/renesas/ravb.h +++ b/drivers/net/ethernet/renesas/ravb.h @@ -20,6 +20,8 @@ #include #include #include +#include +#include #define BE_TX_RING_SIZE 64 /* TX ring size for Best Effort */ #define BE_RX_RING_SIZE 1024 /* RX ring size for Best Effort */ @@ -744,6 +746,23 @@ struct ravb_tstamp_skb { u16 tag; }; +struct ravb_ptp_perout { + u32 target; + u32 period; +}; + +#define N_EXT_TS 1 +#define N_PER_OUT 1 + +struct ravb_ptp { + struct ptp_clock *clock; + struct ptp_clock_info info; + u32 default_addend; + u32 current_addend; + int extts[N_EXT_TS]; + struct ravb_ptp_perout perout[N_PER_OUT]; +}; + struct ravb_private { struct net_device *ndev; struct platform_device *pdev; @@ -768,6 +787,7 @@ struct ravb_private { u32 tstamp_rx_ctrl; struct list_head ts_skb_list; u32 ts_skb_tag; + struct ravb_ptp ptp; spinlock_t lock; /* Register access lock */ u32 cur_rx[NUM_RX_QUEUE]; /* Consumer ring indices */ u32 dirty_rx[NUM_RX_QUEUE]; /* Producer ring indices */ @@ -803,4 +823,10 @@ static inline void ravb_write(struct net_device *ndev, u32 data, iowrite32(data, priv->addr + reg); } +int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value); + +irqreturn_t ravb_ptp_interrupt(struct net_device *ndev); +void ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev); +void ravb_ptp_stop(struct net_device *ndev); + #endif /* #ifndef __RAVB_H__ */ diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c new file mode 100644 index 000000000000..fd9745714d90 --- /dev/null +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -0,0 +1,1824 @@ +/* Renesas Ethernet AVB device driver + * + * Copyright (C) 2014-2015 Renesas Electronics Corporation + * Copyright (C) 2015 Renesas Solutions Corp. + * Copyright (C) 2015 Cogent Embedded, Inc. + * + * Based on the SuperH Ethernet driver + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License version 2, + * as published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ravb.h" + +#define RAVB_DEF_MSG_ENABLE \ + (NETIF_MSG_LINK | \ + NETIF_MSG_TIMER | \ + NETIF_MSG_RX_ERR | \ + NETIF_MSG_TX_ERR) + +int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value) +{ + int i; + + for (i = 0; i < 10000; i++) { + if ((ravb_read(ndev, reg) & mask) == value) + return 0; + udelay(10); + } + return -ETIMEDOUT; +} + +static int ravb_config(struct net_device *ndev) +{ + int error; + + /* Set config mode */ + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG, + CCC); + /* Check if the operating mode is changed to the config mode */ + error = ravb_wait(ndev, CSR, CSR_OPS, CSR_OPS_CONFIG); + if (error) + netdev_err(ndev, "failed to switch device to config mode\n"); + + return error; +} + +static void ravb_set_duplex(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + u32 ecmr = ravb_read(ndev, ECMR); + + if (priv->duplex) /* Full */ + ecmr |= ECMR_DM; + else /* Half */ + ecmr &= ~ECMR_DM; + ravb_write(ndev, ecmr, ECMR); +} + +static void ravb_set_rate(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + switch (priv->speed) { + case 100: /* 100BASE */ + ravb_write(ndev, GECMR_SPEED_100, GECMR); + break; + case 1000: /* 1000BASE */ + ravb_write(ndev, GECMR_SPEED_1000, GECMR); + break; + default: + break; + } +} + +static void ravb_set_buffer_align(struct sk_buff *skb) +{ + u32 reserve = (unsigned long)skb->data & (RAVB_ALIGN - 1); + + if (reserve) + skb_reserve(skb, RAVB_ALIGN - reserve); +} + +/* Get MAC address from the MAC address registers + * + * Ethernet AVB device doesn't have ROM for MAC address. + * This function gets the MAC address that was used by a bootloader. + */ +static void ravb_read_mac_address(struct net_device *ndev, const u8 *mac) +{ + if (mac) { + ether_addr_copy(ndev->dev_addr, mac); + } else { + ndev->dev_addr[0] = (ravb_read(ndev, MAHR) >> 24); + ndev->dev_addr[1] = (ravb_read(ndev, MAHR) >> 16) & 0xFF; + ndev->dev_addr[2] = (ravb_read(ndev, MAHR) >> 8) & 0xFF; + ndev->dev_addr[3] = (ravb_read(ndev, MAHR) >> 0) & 0xFF; + ndev->dev_addr[4] = (ravb_read(ndev, MALR) >> 8) & 0xFF; + ndev->dev_addr[5] = (ravb_read(ndev, MALR) >> 0) & 0xFF; + } +} + +static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set) +{ + struct ravb_private *priv = container_of(ctrl, struct ravb_private, + mdiobb); + u32 pir = ravb_read(priv->ndev, PIR); + + if (set) + pir |= mask; + else + pir &= ~mask; + ravb_write(priv->ndev, pir, PIR); +} + +/* MDC pin control */ +static void ravb_set_mdc(struct mdiobb_ctrl *ctrl, int level) +{ + ravb_mdio_ctrl(ctrl, PIR_MDC, level); +} + +/* Data I/O pin control */ +static void ravb_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output) +{ + ravb_mdio_ctrl(ctrl, PIR_MMD, output); +} + +/* Set data bit */ +static void ravb_set_mdio_data(struct mdiobb_ctrl *ctrl, int value) +{ + ravb_mdio_ctrl(ctrl, PIR_MDO, value); +} + +/* Get data bit */ +static int ravb_get_mdio_data(struct mdiobb_ctrl *ctrl) +{ + struct ravb_private *priv = container_of(ctrl, struct ravb_private, + mdiobb); + + return (ravb_read(priv->ndev, PIR) & PIR_MDI) != 0; +} + +/* MDIO bus control struct */ +static struct mdiobb_ops bb_ops = { + .owner = THIS_MODULE, + .set_mdc = ravb_set_mdc, + .set_mdio_dir = ravb_set_mdio_dir, + .set_mdio_data = ravb_set_mdio_data, + .get_mdio_data = ravb_get_mdio_data, +}; + +/* Free skb's and DMA buffers for Ethernet AVB */ +static void ravb_ring_free(struct net_device *ndev, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + int ring_size; + int i; + + /* Free RX skb ringbuffer */ + if (priv->rx_skb[q]) { + for (i = 0; i < priv->num_rx_ring[q]; i++) + dev_kfree_skb(priv->rx_skb[q][i]); + } + kfree(priv->rx_skb[q]); + priv->rx_skb[q] = NULL; + + /* Free TX skb ringbuffer */ + if (priv->tx_skb[q]) { + for (i = 0; i < priv->num_tx_ring[q]; i++) + dev_kfree_skb(priv->tx_skb[q][i]); + } + kfree(priv->tx_skb[q]); + priv->tx_skb[q] = NULL; + + /* Free aligned TX buffers */ + if (priv->tx_buffers[q]) { + for (i = 0; i < priv->num_tx_ring[q]; i++) + kfree(priv->tx_buffers[q][i]); + } + kfree(priv->tx_buffers[q]); + priv->tx_buffers[q] = NULL; + + if (priv->rx_ring[q]) { + ring_size = sizeof(struct ravb_ex_rx_desc) * + (priv->num_rx_ring[q] + 1); + dma_free_coherent(NULL, ring_size, priv->rx_ring[q], + priv->rx_desc_dma[q]); + priv->rx_ring[q] = NULL; + } + + if (priv->tx_ring[q]) { + ring_size = sizeof(struct ravb_tx_desc) * + (priv->num_tx_ring[q] + 1); + dma_free_coherent(NULL, ring_size, priv->tx_ring[q], + priv->tx_desc_dma[q]); + priv->tx_ring[q] = NULL; + } +} + +/* Format skb and descriptor buffer for Ethernet AVB */ +static void ravb_ring_format(struct net_device *ndev, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct ravb_ex_rx_desc *rx_desc = NULL; + struct ravb_tx_desc *tx_desc = NULL; + struct ravb_desc *desc = NULL; + int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q]; + int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q]; + struct sk_buff *skb; + dma_addr_t dma_addr; + void *buffer; + int i; + + priv->cur_rx[q] = 0; + priv->cur_tx[q] = 0; + priv->dirty_rx[q] = 0; + priv->dirty_tx[q] = 0; + + memset(priv->rx_ring[q], 0, rx_ring_size); + /* Build RX ring buffer */ + for (i = 0; i < priv->num_rx_ring[q]; i++) { + priv->rx_skb[q][i] = NULL; + skb = netdev_alloc_skb(ndev, PKT_BUF_SZ + RAVB_ALIGN - 1); + if (!skb) + break; + ravb_set_buffer_align(skb); + /* RX descriptor */ + rx_desc = &priv->rx_ring[q][i]; + /* The size of the buffer should be on 16-byte boundary. */ + rx_desc->ds_cc = cpu_to_le16(ALIGN(PKT_BUF_SZ, 16)); + dma_addr = dma_map_single(&ndev->dev, skb->data, + ALIGN(PKT_BUF_SZ, 16), + DMA_FROM_DEVICE); + if (dma_mapping_error(&ndev->dev, dma_addr)) { + dev_kfree_skb(skb); + break; + } + priv->rx_skb[q][i] = skb; + rx_desc->dptr = cpu_to_le32(dma_addr); + rx_desc->die_dt = DT_FEMPTY; + } + rx_desc = &priv->rx_ring[q][i]; + rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]); + rx_desc->die_dt = DT_LINKFIX; /* type */ + priv->dirty_rx[q] = (u32)(i - priv->num_rx_ring[q]); + + memset(priv->tx_ring[q], 0, tx_ring_size); + /* Build TX ring buffer */ + for (i = 0; i < priv->num_tx_ring[q]; i++) { + priv->tx_skb[q][i] = NULL; + priv->tx_buffers[q][i] = NULL; + buffer = kmalloc(PKT_BUF_SZ + RAVB_ALIGN - 1, GFP_KERNEL); + if (!buffer) + break; + /* Aligned TX buffer */ + priv->tx_buffers[q][i] = buffer; + tx_desc = &priv->tx_ring[q][i]; + tx_desc->die_dt = DT_EEMPTY; + } + tx_desc = &priv->tx_ring[q][i]; + tx_desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]); + tx_desc->die_dt = DT_LINKFIX; /* type */ + + /* RX descriptor base address for best effort */ + desc = &priv->desc_bat[RX_QUEUE_OFFSET + q]; + desc->die_dt = DT_LINKFIX; /* type */ + desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]); + + /* TX descriptor base address for best effort */ + desc = &priv->desc_bat[q]; + desc->die_dt = DT_LINKFIX; /* type */ + desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]); +} + +/* Init skb and descriptor buffer for Ethernet AVB */ +static int ravb_ring_init(struct net_device *ndev, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + int ring_size; + + /* Allocate RX and TX skb rings */ + priv->rx_skb[q] = kcalloc(priv->num_rx_ring[q], + sizeof(*priv->rx_skb[q]), GFP_KERNEL); + priv->tx_skb[q] = kcalloc(priv->num_tx_ring[q], + sizeof(*priv->tx_skb[q]), GFP_KERNEL); + if (!priv->rx_skb[q] || !priv->tx_skb[q]) + goto error; + + /* Allocate rings for the aligned buffers */ + priv->tx_buffers[q] = kcalloc(priv->num_tx_ring[q], + sizeof(*priv->tx_buffers[q]), GFP_KERNEL); + if (!priv->tx_buffers[q]) + goto error; + + /* Allocate all RX descriptors. */ + ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1); + priv->rx_ring[q] = dma_alloc_coherent(NULL, ring_size, + &priv->rx_desc_dma[q], + GFP_KERNEL); + if (!priv->rx_ring[q]) + goto error; + + priv->dirty_rx[q] = 0; + + /* Allocate all TX descriptors. */ + ring_size = sizeof(struct ravb_tx_desc) * (priv->num_tx_ring[q] + 1); + priv->tx_ring[q] = dma_alloc_coherent(NULL, ring_size, + &priv->tx_desc_dma[q], + GFP_KERNEL); + if (!priv->tx_ring[q]) + goto error; + + return 0; + +error: + ravb_ring_free(ndev, q); + + return -ENOMEM; +} + +/* E-MAC init function */ +static void ravb_emac_init(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + u32 ecmr; + + /* Receive frame limit set register */ + ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR); + + /* PAUSE prohibition */ + ecmr = ravb_read(ndev, ECMR); + ecmr &= ECMR_DM; + ecmr |= ECMR_ZPF | (priv->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE; + ravb_write(ndev, ecmr, ECMR); + + ravb_set_rate(ndev); + + /* Set MAC address */ + ravb_write(ndev, + (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) | + (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR); + ravb_write(ndev, + (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR); + + ravb_write(ndev, 1, MPR); + + /* E-MAC status register clear */ + ravb_write(ndev, ECSR_ICD | ECSR_MPD, ECSR); + + /* E-MAC interrupt enable register */ + ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR); +} + +/* Device init function for Ethernet AVB */ +static int ravb_dmac_init(struct net_device *ndev) +{ + int error; + + /* Set CONFIG mode */ + error = ravb_config(ndev); + if (error) + return error; + + error = ravb_ring_init(ndev, RAVB_BE); + if (error) + return error; + error = ravb_ring_init(ndev, RAVB_NC); + if (error) { + ravb_ring_free(ndev, RAVB_BE); + return error; + } + + /* Descriptor format */ + ravb_ring_format(ndev, RAVB_BE); + ravb_ring_format(ndev, RAVB_NC); + +#if defined(__LITTLE_ENDIAN) + ravb_write(ndev, ravb_read(ndev, CCC) & ~CCC_BOC, CCC); +#else + ravb_write(ndev, ravb_read(ndev, CCC) | CCC_BOC, CCC); +#endif + + /* Set AVB RX */ + ravb_write(ndev, RCR_EFFS | RCR_ENCF | RCR_ETS0 | 0x18000000, RCR); + + /* Set FIFO size */ + ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00222200, TGC); + + /* Timestamp enable */ + ravb_write(ndev, TCCR_TFEN, TCCR); + + /* Interrupt enable: */ + /* Frame receive */ + ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0); + /* Receive FIFO full warning */ + ravb_write(ndev, RIC1_RFWE, RIC1); + /* Receive FIFO full error, descriptor empty */ + ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2); + /* Frame transmitted, timestamp FIFO updated */ + ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC); + + /* Setting the control will start the AVB-DMAC process. */ + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_OPERATION, + CCC); + + return 0; +} + +/* Free TX skb function for AVB-IP */ +static int ravb_tx_free(struct net_device *ndev, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct net_device_stats *stats = &priv->stats[q]; + struct ravb_tx_desc *desc; + int free_num = 0; + int entry = 0; + u32 size; + + for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) { + entry = priv->dirty_tx[q] % priv->num_tx_ring[q]; + desc = &priv->tx_ring[q][entry]; + if (desc->die_dt != DT_FEMPTY) + break; + /* Descriptor type must be checked before all other reads */ + dma_rmb(); + size = le16_to_cpu(desc->ds_tagl) & TX_DS; + /* Free the original skb. */ + if (priv->tx_skb[q][entry]) { + dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr), + size, DMA_TO_DEVICE); + dev_kfree_skb_any(priv->tx_skb[q][entry]); + priv->tx_skb[q][entry] = NULL; + free_num++; + } + stats->tx_packets++; + stats->tx_bytes += size; + desc->die_dt = DT_EEMPTY; + } + return free_num; +} + +static void ravb_get_tx_tstamp(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct ravb_tstamp_skb *ts_skb, *ts_skb2; + struct skb_shared_hwtstamps shhwtstamps; + struct sk_buff *skb; + struct timespec64 ts; + u16 tag, tfa_tag; + int count; + u32 tfa2; + + count = (ravb_read(ndev, TSR) & TSR_TFFL) >> 8; + while (count--) { + tfa2 = ravb_read(ndev, TFA2); + tfa_tag = (tfa2 & TFA2_TST) >> 16; + ts.tv_nsec = (u64)ravb_read(ndev, TFA0); + ts.tv_sec = ((u64)(tfa2 & TFA2_TSV) << 32) | + ravb_read(ndev, TFA1); + memset(&shhwtstamps, 0, sizeof(shhwtstamps)); + shhwtstamps.hwtstamp = timespec64_to_ktime(ts); + list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, + list) { + skb = ts_skb->skb; + tag = ts_skb->tag; + list_del(&ts_skb->list); + kfree(ts_skb); + if (tag == tfa_tag) { + skb_tstamp_tx(skb, &shhwtstamps); + break; + } + } + ravb_write(ndev, ravb_read(ndev, TCCR) | TCCR_TFR, TCCR); + } +} + +/* Packet receive function for Ethernet AVB */ +static bool ravb_rx(struct net_device *ndev, int *quota, int q) +{ + struct ravb_private *priv = netdev_priv(ndev); + int entry = priv->cur_rx[q] % priv->num_rx_ring[q]; + int boguscnt = (priv->dirty_rx[q] + priv->num_rx_ring[q]) - + priv->cur_rx[q]; + struct net_device_stats *stats = &priv->stats[q]; + struct ravb_ex_rx_desc *desc; + struct sk_buff *skb; + dma_addr_t dma_addr; + struct timespec64 ts; + u16 pkt_len = 0; + u8 desc_status; + int limit; + + boguscnt = min(boguscnt, *quota); + limit = boguscnt; + desc = &priv->rx_ring[q][entry]; + while (desc->die_dt != DT_FEMPTY) { + /* Descriptor type must be checked before all other reads */ + dma_rmb(); + desc_status = desc->msc; + pkt_len = le16_to_cpu(desc->ds_cc) & RX_DS; + + if (--boguscnt < 0) + break; + + if (desc_status & MSC_MC) + stats->multicast++; + + if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF | + MSC_CEEF)) { + stats->rx_errors++; + if (desc_status & MSC_CRC) + stats->rx_crc_errors++; + if (desc_status & MSC_RFE) + stats->rx_frame_errors++; + if (desc_status & (MSC_RTLF | MSC_RTSF)) + stats->rx_length_errors++; + if (desc_status & MSC_CEEF) + stats->rx_missed_errors++; + } else { + u32 get_ts = priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE; + + skb = priv->rx_skb[q][entry]; + priv->rx_skb[q][entry] = NULL; + dma_sync_single_for_cpu(&ndev->dev, + le32_to_cpu(desc->dptr), + ALIGN(PKT_BUF_SZ, 16), + DMA_FROM_DEVICE); + get_ts &= (q == RAVB_NC) ? + RAVB_RXTSTAMP_TYPE_V2_L2_EVENT : + ~RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; + if (get_ts) { + struct skb_shared_hwtstamps *shhwtstamps; + + shhwtstamps = skb_hwtstamps(skb); + memset(shhwtstamps, 0, sizeof(*shhwtstamps)); + ts.tv_sec = ((u64) le16_to_cpu(desc->ts_sh) << + 32) | le32_to_cpu(desc->ts_sl); + ts.tv_nsec = le32_to_cpu(desc->ts_n); + shhwtstamps->hwtstamp = timespec64_to_ktime(ts); + } + skb_put(skb, pkt_len); + skb->protocol = eth_type_trans(skb, ndev); + napi_gro_receive(&priv->napi[q], skb); + stats->rx_packets++; + stats->rx_bytes += pkt_len; + } + + entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q]; + desc = &priv->rx_ring[q][entry]; + } + + /* Refill the RX ring buffers. */ + for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) { + entry = priv->dirty_rx[q] % priv->num_rx_ring[q]; + desc = &priv->rx_ring[q][entry]; + /* The size of the buffer should be on 16-byte boundary. */ + desc->ds_cc = cpu_to_le16(ALIGN(PKT_BUF_SZ, 16)); + + if (!priv->rx_skb[q][entry]) { + skb = netdev_alloc_skb(ndev, + PKT_BUF_SZ + RAVB_ALIGN - 1); + if (!skb) + break; /* Better luck next round. */ + ravb_set_buffer_align(skb); + dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr), + ALIGN(PKT_BUF_SZ, 16), + DMA_FROM_DEVICE); + dma_addr = dma_map_single(&ndev->dev, skb->data, + le16_to_cpu(desc->ds_cc), + DMA_FROM_DEVICE); + skb_checksum_none_assert(skb); + if (dma_mapping_error(&ndev->dev, dma_addr)) { + dev_kfree_skb_any(skb); + break; + } + desc->dptr = cpu_to_le32(dma_addr); + priv->rx_skb[q][entry] = skb; + } + /* Descriptor type must be set after all the above writes */ + dma_wmb(); + desc->die_dt = DT_FEMPTY; + } + + *quota -= limit - (++boguscnt); + + return boguscnt <= 0; +} + +static void ravb_rcv_snd_disable(struct net_device *ndev) +{ + /* Disable TX and RX */ + ravb_write(ndev, ravb_read(ndev, ECMR) & ~(ECMR_RE | ECMR_TE), ECMR); +} + +static void ravb_rcv_snd_enable(struct net_device *ndev) +{ + /* Enable TX and RX */ + ravb_write(ndev, ravb_read(ndev, ECMR) | ECMR_RE | ECMR_TE, ECMR); +} + +/* function for waiting dma process finished */ +static int ravb_stop_dma(struct net_device *ndev) +{ + int error; + + /* Wait for stopping the hardware TX process */ + error = ravb_wait(ndev, TCCR, + TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3, 0); + if (error) + return error; + + error = ravb_wait(ndev, CSR, CSR_TPO0 | CSR_TPO1 | CSR_TPO2 | CSR_TPO3, + 0); + if (error) + return error; + + /* Stop the E-MAC's RX/TX processes. */ + ravb_rcv_snd_disable(ndev); + + /* Wait for stopping the RX DMA process */ + error = ravb_wait(ndev, CSR, CSR_RPO, 0); + if (error) + return error; + + /* Stop AVB-DMAC process */ + return ravb_config(ndev); +} + +/* E-MAC interrupt handler */ +static void ravb_emac_interrupt(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + u32 ecsr, psr; + + ecsr = ravb_read(ndev, ECSR); + ravb_write(ndev, ecsr, ECSR); /* clear interrupt */ + if (ecsr & ECSR_ICD) + ndev->stats.tx_carrier_errors++; + if (ecsr & ECSR_LCHNG) { + /* Link changed */ + if (priv->no_avb_link) + return; + psr = ravb_read(ndev, PSR); + if (priv->avb_link_active_low) + psr ^= PSR_LMON; + if (!(psr & PSR_LMON)) { + /* DIsable RX and TX */ + ravb_rcv_snd_disable(ndev); + } else { + /* Enable RX and TX */ + ravb_rcv_snd_enable(ndev); + } + } +} + +/* Error interrupt handler */ +static void ravb_error_interrupt(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + u32 eis, ris2; + + eis = ravb_read(ndev, EIS); + ravb_write(ndev, ~EIS_QFS, EIS); + if (eis & EIS_QFS) { + ris2 = ravb_read(ndev, RIS2); + ravb_write(ndev, ~(RIS2_QFF0 | RIS2_RFFF), RIS2); + + /* Receive Descriptor Empty int */ + if (ris2 & RIS2_QFF0) + priv->stats[RAVB_BE].rx_over_errors++; + + /* Receive Descriptor Empty int */ + if (ris2 & RIS2_QFF1) + priv->stats[RAVB_NC].rx_over_errors++; + + /* Receive FIFO Overflow int */ + if (ris2 & RIS2_RFFF) + priv->rx_fifo_errors++; + } +} + +static irqreturn_t ravb_interrupt(int irq, void *dev_id) +{ + struct net_device *ndev = dev_id; + struct ravb_private *priv = netdev_priv(ndev); + irqreturn_t result = IRQ_NONE; + u32 iss; + + spin_lock(&priv->lock); + /* Get interrupt status */ + iss = ravb_read(ndev, ISS); + + /* Received and transmitted interrupts */ + if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) { + u32 ris0 = ravb_read(ndev, RIS0); + u32 ric0 = ravb_read(ndev, RIC0); + u32 tis = ravb_read(ndev, TIS); + u32 tic = ravb_read(ndev, TIC); + int q; + + /* Timestamp updated */ + if (tis & TIS_TFUF) { + ravb_write(ndev, ~TIS_TFUF, TIS); + ravb_get_tx_tstamp(ndev); + result = IRQ_HANDLED; + } + + /* Network control and best effort queue RX/TX */ + for (q = RAVB_NC; q >= RAVB_BE; q--) { + if (((ris0 & ric0) & BIT(q)) || + ((tis & tic) & BIT(q))) { + if (napi_schedule_prep(&priv->napi[q])) { + /* Mask RX and TX interrupts */ + ravb_write(ndev, ric0 & ~BIT(q), RIC0); + ravb_write(ndev, tic & ~BIT(q), TIC); + __napi_schedule(&priv->napi[q]); + } else { + netdev_warn(ndev, + "ignoring interrupt, rx status 0x%08x, rx mask 0x%08x,\n", + ris0, ric0); + netdev_warn(ndev, + " tx status 0x%08x, tx mask 0x%08x.\n", + tis, tic); + } + result = IRQ_HANDLED; + } + } + } + + /* E-MAC status summary */ + if (iss & ISS_MS) { + ravb_emac_interrupt(ndev); + result = IRQ_HANDLED; + } + + /* Error status summary */ + if (iss & ISS_ES) { + ravb_error_interrupt(ndev); + result = IRQ_HANDLED; + } + + if (iss & ISS_CGIS) + result = ravb_ptp_interrupt(ndev); + + mmiowb(); + spin_unlock(&priv->lock); + return result; +} + +static int ravb_poll(struct napi_struct *napi, int budget) +{ + struct net_device *ndev = napi->dev; + struct ravb_private *priv = netdev_priv(ndev); + unsigned long flags; + int q = napi - priv->napi; + int mask = BIT(q); + int quota = budget; + u32 ris0, tis; + + for (;;) { + tis = ravb_read(ndev, TIS); + ris0 = ravb_read(ndev, RIS0); + if (!((ris0 & mask) || (tis & mask))) + break; + + /* Processing RX Descriptor Ring */ + if (ris0 & mask) { + /* Clear RX interrupt */ + ravb_write(ndev, ~mask, RIS0); + if (ravb_rx(ndev, "a, q)) + goto out; + } + /* Processing TX Descriptor Ring */ + if (tis & mask) { + spin_lock_irqsave(&priv->lock, flags); + /* Clear TX interrupt */ + ravb_write(ndev, ~mask, TIS); + ravb_tx_free(ndev, q); + netif_wake_subqueue(ndev, q); + mmiowb(); + spin_unlock_irqrestore(&priv->lock, flags); + } + } + + napi_complete(napi); + + /* Re-enable RX/TX interrupts */ + spin_lock_irqsave(&priv->lock, flags); + ravb_write(ndev, ravb_read(ndev, RIC0) | mask, RIC0); + ravb_write(ndev, ravb_read(ndev, TIC) | mask, TIC); + mmiowb(); + spin_unlock_irqrestore(&priv->lock, flags); + + /* Receive error message handling */ + priv->rx_over_errors = priv->stats[RAVB_BE].rx_over_errors; + priv->rx_over_errors += priv->stats[RAVB_NC].rx_over_errors; + if (priv->rx_over_errors != ndev->stats.rx_over_errors) { + ndev->stats.rx_over_errors = priv->rx_over_errors; + netif_err(priv, rx_err, ndev, "Receive Descriptor Empty\n"); + } + if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors) { + ndev->stats.rx_fifo_errors = priv->rx_fifo_errors; + netif_err(priv, rx_err, ndev, "Receive FIFO Overflow\n"); + } +out: + return budget - quota; +} + +/* PHY state control function */ +static void ravb_adjust_link(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct phy_device *phydev = priv->phydev; + bool new_state = false; + + if (phydev->link) { + if (phydev->duplex != priv->duplex) { + new_state = true; + priv->duplex = phydev->duplex; + ravb_set_duplex(ndev); + } + + if (phydev->speed != priv->speed) { + new_state = true; + priv->speed = phydev->speed; + ravb_set_rate(ndev); + } + if (!priv->link) { + ravb_write(ndev, ravb_read(ndev, ECMR) & ~ECMR_TXF, + ECMR); + new_state = true; + priv->link = phydev->link; + if (priv->no_avb_link) + ravb_rcv_snd_enable(ndev); + } + } else if (priv->link) { + new_state = true; + priv->link = 0; + priv->speed = 0; + priv->duplex = -1; + if (priv->no_avb_link) + ravb_rcv_snd_disable(ndev); + } + + if (new_state && netif_msg_link(priv)) + phy_print_status(phydev); +} + +/* PHY init function */ +static int ravb_phy_init(struct net_device *ndev) +{ + struct device_node *np = ndev->dev.parent->of_node; + struct ravb_private *priv = netdev_priv(ndev); + struct phy_device *phydev; + struct device_node *pn; + + priv->link = 0; + priv->speed = 0; + priv->duplex = -1; + + /* Try connecting to PHY */ + pn = of_parse_phandle(np, "phy-handle", 0); + phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0, + priv->phy_interface); + if (!phydev) { + netdev_err(ndev, "failed to connect PHY\n"); + return -ENOENT; + } + + netdev_info(ndev, "attached PHY %d (IRQ %d) to driver %s\n", + phydev->addr, phydev->irq, phydev->drv->name); + + priv->phydev = phydev; + + return 0; +} + +/* PHY control start function */ +static int ravb_phy_start(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + int error; + + error = ravb_phy_init(ndev); + if (error) + return error; + + phy_start(priv->phydev); + + return 0; +} + +static int ravb_get_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) +{ + struct ravb_private *priv = netdev_priv(ndev); + int error = -ENODEV; + unsigned long flags; + + if (priv->phydev) { + spin_lock_irqsave(&priv->lock, flags); + error = phy_ethtool_gset(priv->phydev, ecmd); + spin_unlock_irqrestore(&priv->lock, flags); + } + + return error; +} + +static int ravb_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd) +{ + struct ravb_private *priv = netdev_priv(ndev); + unsigned long flags; + int error; + + if (!priv->phydev) + return -ENODEV; + + spin_lock_irqsave(&priv->lock, flags); + + /* Disable TX and RX */ + ravb_rcv_snd_disable(ndev); + + error = phy_ethtool_sset(priv->phydev, ecmd); + if (error) + goto error_exit; + + if (ecmd->duplex == DUPLEX_FULL) + priv->duplex = 1; + else + priv->duplex = 0; + + ravb_set_duplex(ndev); + +error_exit: + mdelay(1); + + /* Enable TX and RX */ + ravb_rcv_snd_enable(ndev); + + mmiowb(); + spin_unlock_irqrestore(&priv->lock, flags); + + return error; +} + +static int ravb_nway_reset(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + int error = -ENODEV; + unsigned long flags; + + if (priv->phydev) { + spin_lock_irqsave(&priv->lock, flags); + error = phy_start_aneg(priv->phydev); + spin_unlock_irqrestore(&priv->lock, flags); + } + + return error; +} + +static u32 ravb_get_msglevel(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + return priv->msg_enable; +} + +static void ravb_set_msglevel(struct net_device *ndev, u32 value) +{ + struct ravb_private *priv = netdev_priv(ndev); + + priv->msg_enable = value; +} + +static const char ravb_gstrings_stats[][ETH_GSTRING_LEN] = { + "rx_queue_0_current", + "tx_queue_0_current", + "rx_queue_0_dirty", + "tx_queue_0_dirty", + "rx_queue_0_packets", + "tx_queue_0_packets", + "rx_queue_0_bytes", + "tx_queue_0_bytes", + "rx_queue_0_mcast_packets", + "rx_queue_0_errors", + "rx_queue_0_crc_errors", + "rx_queue_0_frame_errors", + "rx_queue_0_length_errors", + "rx_queue_0_missed_errors", + "rx_queue_0_over_errors", + + "rx_queue_1_current", + "tx_queue_1_current", + "rx_queue_1_dirty", + "tx_queue_1_dirty", + "rx_queue_1_packets", + "tx_queue_1_packets", + "rx_queue_1_bytes", + "tx_queue_1_bytes", + "rx_queue_1_mcast_packets", + "rx_queue_1_errors", + "rx_queue_1_crc_errors", + "rx_queue_1_frame_errors_", + "rx_queue_1_length_errors", + "rx_queue_1_missed_errors", + "rx_queue_1_over_errors", +}; + +#define RAVB_STATS_LEN ARRAY_SIZE(ravb_gstrings_stats) + +static int ravb_get_sset_count(struct net_device *netdev, int sset) +{ + switch (sset) { + case ETH_SS_STATS: + return RAVB_STATS_LEN; + default: + return -EOPNOTSUPP; + } +} + +static void ravb_get_ethtool_stats(struct net_device *ndev, + struct ethtool_stats *stats, u64 *data) +{ + struct ravb_private *priv = netdev_priv(ndev); + int i = 0; + int q; + + /* Device-specific stats */ + for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) { + struct net_device_stats *stats = &priv->stats[q]; + + data[i++] = priv->cur_rx[q]; + data[i++] = priv->cur_tx[q]; + data[i++] = priv->dirty_rx[q]; + data[i++] = priv->dirty_tx[q]; + data[i++] = stats->rx_packets; + data[i++] = stats->tx_packets; + data[i++] = stats->rx_bytes; + data[i++] = stats->tx_bytes; + data[i++] = stats->multicast; + data[i++] = stats->rx_errors; + data[i++] = stats->rx_crc_errors; + data[i++] = stats->rx_frame_errors; + data[i++] = stats->rx_length_errors; + data[i++] = stats->rx_missed_errors; + data[i++] = stats->rx_over_errors; + } +} + +static void ravb_get_strings(struct net_device *ndev, u32 stringset, u8 *data) +{ + switch (stringset) { + case ETH_SS_STATS: + memcpy(data, *ravb_gstrings_stats, sizeof(ravb_gstrings_stats)); + break; + } +} + +static void ravb_get_ringparam(struct net_device *ndev, + struct ethtool_ringparam *ring) +{ + struct ravb_private *priv = netdev_priv(ndev); + + ring->rx_max_pending = BE_RX_RING_MAX; + ring->tx_max_pending = BE_TX_RING_MAX; + ring->rx_pending = priv->num_rx_ring[RAVB_BE]; + ring->tx_pending = priv->num_tx_ring[RAVB_BE]; +} + +static int ravb_set_ringparam(struct net_device *ndev, + struct ethtool_ringparam *ring) +{ + struct ravb_private *priv = netdev_priv(ndev); + int error; + + if (ring->tx_pending > BE_TX_RING_MAX || + ring->rx_pending > BE_RX_RING_MAX || + ring->tx_pending < BE_TX_RING_MIN || + ring->rx_pending < BE_RX_RING_MIN) + return -EINVAL; + if (ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + + if (netif_running(ndev)) { + netif_device_detach(ndev); + /* Stop PTP Clock driver */ + ravb_ptp_stop(ndev); + /* Wait for DMA stopping */ + error = ravb_stop_dma(ndev); + if (error) { + netdev_err(ndev, + "cannot set ringparam! Any AVB processes are still running?\n"); + return error; + } + synchronize_irq(ndev->irq); + + /* Free all the skb's in the RX queue and the DMA buffers. */ + ravb_ring_free(ndev, RAVB_BE); + ravb_ring_free(ndev, RAVB_NC); + } + + /* Set new parameters */ + priv->num_rx_ring[RAVB_BE] = ring->rx_pending; + priv->num_tx_ring[RAVB_BE] = ring->tx_pending; + + if (netif_running(ndev)) { + error = ravb_dmac_init(ndev); + if (error) { + netdev_err(ndev, + "%s: ravb_dmac_init() failed, error %d\n", + __func__, error); + return error; + } + + ravb_emac_init(ndev); + + /* Initialise PTP Clock driver */ + ravb_ptp_init(ndev, priv->pdev); + + netif_device_attach(ndev); + } + + return 0; +} + +static int ravb_get_ts_info(struct net_device *ndev, + struct ethtool_ts_info *info) +{ + struct ravb_private *priv = netdev_priv(ndev); + + info->so_timestamping = + SOF_TIMESTAMPING_TX_SOFTWARE | + SOF_TIMESTAMPING_RX_SOFTWARE | + SOF_TIMESTAMPING_SOFTWARE | + SOF_TIMESTAMPING_TX_HARDWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON); + info->rx_filters = + (1 << HWTSTAMP_FILTER_NONE) | + (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | + (1 << HWTSTAMP_FILTER_ALL); + info->phc_index = ptp_clock_index(priv->ptp.clock); + + return 0; +} + +static const struct ethtool_ops ravb_ethtool_ops = { + .get_settings = ravb_get_settings, + .set_settings = ravb_set_settings, + .nway_reset = ravb_nway_reset, + .get_msglevel = ravb_get_msglevel, + .set_msglevel = ravb_set_msglevel, + .get_link = ethtool_op_get_link, + .get_strings = ravb_get_strings, + .get_ethtool_stats = ravb_get_ethtool_stats, + .get_sset_count = ravb_get_sset_count, + .get_ringparam = ravb_get_ringparam, + .set_ringparam = ravb_set_ringparam, + .get_ts_info = ravb_get_ts_info, +}; + +/* Network device open function for Ethernet AVB */ +static int ravb_open(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + int error; + + napi_enable(&priv->napi[RAVB_BE]); + napi_enable(&priv->napi[RAVB_NC]); + + error = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED, ndev->name, + ndev); + if (error) { + netdev_err(ndev, "cannot request IRQ\n"); + goto out_napi_off; + } + + /* Device init */ + error = ravb_dmac_init(ndev); + if (error) + goto out_free_irq; + ravb_emac_init(ndev); + + /* Initialise PTP Clock driver */ + ravb_ptp_init(ndev, priv->pdev); + + netif_tx_start_all_queues(ndev); + + /* PHY control start */ + error = ravb_phy_start(ndev); + if (error) + goto out_ptp_stop; + + return 0; + +out_ptp_stop: + /* Stop PTP Clock driver */ + ravb_ptp_stop(ndev); +out_free_irq: + free_irq(ndev->irq, ndev); +out_napi_off: + napi_disable(&priv->napi[RAVB_NC]); + napi_disable(&priv->napi[RAVB_BE]); + return error; +} + +/* Timeout function for Ethernet AVB */ +static void ravb_tx_timeout(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + netif_err(priv, tx_err, ndev, + "transmit timed out, status %08x, resetting...\n", + ravb_read(ndev, ISS)); + + /* tx_errors count up */ + ndev->stats.tx_errors++; + + schedule_work(&priv->work); +} + +static void ravb_tx_timeout_work(struct work_struct *work) +{ + struct ravb_private *priv = container_of(work, struct ravb_private, + work); + struct net_device *ndev = priv->ndev; + + netif_tx_stop_all_queues(ndev); + + /* Stop PTP Clock driver */ + ravb_ptp_stop(ndev); + + /* Wait for DMA stopping */ + ravb_stop_dma(ndev); + + ravb_ring_free(ndev, RAVB_BE); + ravb_ring_free(ndev, RAVB_NC); + + /* Device init */ + ravb_dmac_init(ndev); + ravb_emac_init(ndev); + + /* Initialise PTP Clock driver */ + ravb_ptp_init(ndev, priv->pdev); + + netif_tx_start_all_queues(ndev); +} + +/* Packet transmit function for Ethernet AVB */ +static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct ravb_tstamp_skb *ts_skb = NULL; + u16 q = skb_get_queue_mapping(skb); + struct ravb_tx_desc *desc; + unsigned long flags; + u32 dma_addr; + void *buffer; + u32 entry; + u32 tccr; + + spin_lock_irqsave(&priv->lock, flags); + if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q]) { + netif_err(priv, tx_queued, ndev, + "still transmitting with the full ring!\n"); + netif_stop_subqueue(ndev, q); + spin_unlock_irqrestore(&priv->lock, flags); + return NETDEV_TX_BUSY; + } + entry = priv->cur_tx[q] % priv->num_tx_ring[q]; + priv->tx_skb[q][entry] = skb; + + if (skb_put_padto(skb, ETH_ZLEN)) + goto drop; + + buffer = PTR_ALIGN(priv->tx_buffers[q][entry], RAVB_ALIGN); + memcpy(buffer, skb->data, skb->len); + desc = &priv->tx_ring[q][entry]; + desc->ds_tagl = cpu_to_le16(skb->len); + dma_addr = dma_map_single(&ndev->dev, buffer, skb->len, DMA_TO_DEVICE); + if (dma_mapping_error(&ndev->dev, dma_addr)) + goto drop; + desc->dptr = cpu_to_le32(dma_addr); + + /* TX timestamp required */ + if (q == RAVB_NC) { + ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC); + if (!ts_skb) { + dma_unmap_single(&ndev->dev, dma_addr, skb->len, + DMA_TO_DEVICE); + goto drop; + } + ts_skb->skb = skb; + ts_skb->tag = priv->ts_skb_tag++; + priv->ts_skb_tag &= 0x3ff; + list_add_tail(&ts_skb->list, &priv->ts_skb_list); + + /* TAG and timestamp required flag */ + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + skb_tx_timestamp(skb); + desc->tagh_tsr = (ts_skb->tag >> 4) | TX_TSR; + desc->ds_tagl |= le16_to_cpu(ts_skb->tag << 12); + } + + /* Descriptor type must be set after all the above writes */ + dma_wmb(); + desc->die_dt = DT_FSINGLE; + + tccr = ravb_read(ndev, TCCR); + if (!(tccr & (TCCR_TSRQ0 << q))) + ravb_write(ndev, tccr | (TCCR_TSRQ0 << q), TCCR); + + priv->cur_tx[q]++; + if (priv->cur_tx[q] - priv->dirty_tx[q] >= priv->num_tx_ring[q] && + !ravb_tx_free(ndev, q)) + netif_stop_subqueue(ndev, q); + +exit: + mmiowb(); + spin_unlock_irqrestore(&priv->lock, flags); + return NETDEV_TX_OK; + +drop: + dev_kfree_skb_any(skb); + priv->tx_skb[q][entry] = NULL; + goto exit; +} + +static u16 ravb_select_queue(struct net_device *ndev, struct sk_buff *skb, + void *accel_priv, select_queue_fallback_t fallback) +{ + /* If skb needs TX timestamp, it is handled in network control queue */ + return (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ? RAVB_NC : + RAVB_BE; + +} + +static struct net_device_stats *ravb_get_stats(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct net_device_stats *nstats, *stats0, *stats1; + + nstats = &ndev->stats; + stats0 = &priv->stats[RAVB_BE]; + stats1 = &priv->stats[RAVB_NC]; + + nstats->tx_dropped += ravb_read(ndev, TROCR); + ravb_write(ndev, 0, TROCR); /* (write clear) */ + nstats->collisions += ravb_read(ndev, CDCR); + ravb_write(ndev, 0, CDCR); /* (write clear) */ + nstats->tx_carrier_errors += ravb_read(ndev, LCCR); + ravb_write(ndev, 0, LCCR); /* (write clear) */ + + nstats->tx_carrier_errors += ravb_read(ndev, CERCR); + ravb_write(ndev, 0, CERCR); /* (write clear) */ + nstats->tx_carrier_errors += ravb_read(ndev, CEECR); + ravb_write(ndev, 0, CEECR); /* (write clear) */ + + nstats->rx_packets = stats0->rx_packets + stats1->rx_packets; + nstats->tx_packets = stats0->tx_packets + stats1->tx_packets; + nstats->rx_bytes = stats0->rx_bytes + stats1->rx_bytes; + nstats->tx_bytes = stats0->tx_bytes + stats1->tx_bytes; + nstats->multicast = stats0->multicast + stats1->multicast; + nstats->rx_errors = stats0->rx_errors + stats1->rx_errors; + nstats->rx_crc_errors = stats0->rx_crc_errors + stats1->rx_crc_errors; + nstats->rx_frame_errors = + stats0->rx_frame_errors + stats1->rx_frame_errors; + nstats->rx_length_errors = + stats0->rx_length_errors + stats1->rx_length_errors; + nstats->rx_missed_errors = + stats0->rx_missed_errors + stats1->rx_missed_errors; + nstats->rx_over_errors = + stats0->rx_over_errors + stats1->rx_over_errors; + + return nstats; +} + +/* Update promiscuous bit */ +static void ravb_set_rx_mode(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + unsigned long flags; + u32 ecmr; + + spin_lock_irqsave(&priv->lock, flags); + ecmr = ravb_read(ndev, ECMR); + if (ndev->flags & IFF_PROMISC) + ecmr |= ECMR_PRM; + else + ecmr &= ~ECMR_PRM; + ravb_write(ndev, ecmr, ECMR); + mmiowb(); + spin_unlock_irqrestore(&priv->lock, flags); +} + +/* Device close function for Ethernet AVB */ +static int ravb_close(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct ravb_tstamp_skb *ts_skb, *ts_skb2; + + netif_tx_stop_all_queues(ndev); + + /* Disable interrupts by clearing the interrupt masks. */ + ravb_write(ndev, 0, RIC0); + ravb_write(ndev, 0, RIC1); + ravb_write(ndev, 0, RIC2); + ravb_write(ndev, 0, TIC); + + /* Stop PTP Clock driver */ + ravb_ptp_stop(ndev); + + /* Set the config mode to stop the AVB-DMAC's processes */ + if (ravb_stop_dma(ndev) < 0) + netdev_err(ndev, + "device will be stopped after h/w processes are done.\n"); + + /* Clear the timestamp list */ + list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, list) { + list_del(&ts_skb->list); + kfree(ts_skb); + } + + /* PHY disconnect */ + if (priv->phydev) { + phy_stop(priv->phydev); + phy_disconnect(priv->phydev); + priv->phydev = NULL; + } + + free_irq(ndev->irq, ndev); + + napi_disable(&priv->napi[RAVB_NC]); + napi_disable(&priv->napi[RAVB_BE]); + + /* Free all the skb's in the RX queue and the DMA buffers. */ + ravb_ring_free(ndev, RAVB_BE); + ravb_ring_free(ndev, RAVB_NC); + + return 0; +} + +static int ravb_hwtstamp_get(struct net_device *ndev, struct ifreq *req) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct hwtstamp_config config; + + config.flags = 0; + config.tx_type = priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON : + HWTSTAMP_TX_OFF; + if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_V2_L2_EVENT) + config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; + else if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_ALL) + config.rx_filter = HWTSTAMP_FILTER_ALL; + else + config.rx_filter = HWTSTAMP_FILTER_NONE; + + return copy_to_user(req->ifr_data, &config, sizeof(config)) ? + -EFAULT : 0; +} + +/* Control hardware time stamping */ +static int ravb_hwtstamp_set(struct net_device *ndev, struct ifreq *req) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct hwtstamp_config config; + u32 tstamp_rx_ctrl = RAVB_RXTSTAMP_ENABLED; + u32 tstamp_tx_ctrl; + + if (copy_from_user(&config, req->ifr_data, sizeof(config))) + return -EFAULT; + + /* Reserved for future extensions */ + if (config.flags) + return -EINVAL; + + switch (config.tx_type) { + case HWTSTAMP_TX_OFF: + tstamp_tx_ctrl = 0; + break; + case HWTSTAMP_TX_ON: + tstamp_tx_ctrl = RAVB_TXTSTAMP_ENABLED; + break; + default: + return -ERANGE; + } + + switch (config.rx_filter) { + case HWTSTAMP_FILTER_NONE: + tstamp_rx_ctrl = 0; + break; + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; + break; + default: + config.rx_filter = HWTSTAMP_FILTER_ALL; + tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_ALL; + } + + priv->tstamp_tx_ctrl = tstamp_tx_ctrl; + priv->tstamp_rx_ctrl = tstamp_rx_ctrl; + + return copy_to_user(req->ifr_data, &config, sizeof(config)) ? + -EFAULT : 0; +} + +/* ioctl to device function */ +static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) +{ + struct ravb_private *priv = netdev_priv(ndev); + struct phy_device *phydev = priv->phydev; + + if (!netif_running(ndev)) + return -EINVAL; + + if (!phydev) + return -ENODEV; + + switch (cmd) { + case SIOCGHWTSTAMP: + return ravb_hwtstamp_get(ndev, req); + case SIOCSHWTSTAMP: + return ravb_hwtstamp_set(ndev, req); + } + + return phy_mii_ioctl(phydev, req, cmd); +} + +static const struct net_device_ops ravb_netdev_ops = { + .ndo_open = ravb_open, + .ndo_stop = ravb_close, + .ndo_start_xmit = ravb_start_xmit, + .ndo_select_queue = ravb_select_queue, + .ndo_get_stats = ravb_get_stats, + .ndo_set_rx_mode = ravb_set_rx_mode, + .ndo_tx_timeout = ravb_tx_timeout, + .ndo_do_ioctl = ravb_do_ioctl, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, + .ndo_change_mtu = eth_change_mtu, +}; + +/* MDIO bus init function */ +static int ravb_mdio_init(struct ravb_private *priv) +{ + struct platform_device *pdev = priv->pdev; + struct device *dev = &pdev->dev; + int error; + + /* Bitbang init */ + priv->mdiobb.ops = &bb_ops; + + /* MII controller setting */ + priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb); + if (!priv->mii_bus) + return -ENOMEM; + + /* Hook up MII support for ethtool */ + priv->mii_bus->name = "ravb_mii"; + priv->mii_bus->parent = dev; + snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", + pdev->name, pdev->id); + + /* Register MDIO bus */ + error = of_mdiobus_register(priv->mii_bus, dev->of_node); + if (error) + goto out_free_bus; + + return 0; + +out_free_bus: + free_mdio_bitbang(priv->mii_bus); + return error; +} + +/* MDIO bus release function */ +static int ravb_mdio_release(struct ravb_private *priv) +{ + /* Unregister mdio bus */ + mdiobus_unregister(priv->mii_bus); + + /* Free bitbang info */ + free_mdio_bitbang(priv->mii_bus); + + return 0; +} + +static int ravb_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct ravb_private *priv; + struct net_device *ndev; + int error, irq, q; + struct resource *res; + + if (!np) { + dev_err(&pdev->dev, + "this driver is required to be instantiated from device tree\n"); + return -EINVAL; + } + + /* Get base address */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "invalid resource\n"); + return -EINVAL; + } + + ndev = alloc_etherdev_mqs(sizeof(struct ravb_private), + NUM_TX_QUEUE, NUM_RX_QUEUE); + if (!ndev) + return -ENOMEM; + + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + + /* The Ether-specific entries in the device structure. */ + ndev->base_addr = res->start; + ndev->dma = -1; + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + error = -ENODEV; + goto out_release; + } + ndev->irq = irq; + + SET_NETDEV_DEV(ndev, &pdev->dev); + + priv = netdev_priv(ndev); + priv->ndev = ndev; + priv->pdev = pdev; + priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE; + priv->num_rx_ring[RAVB_BE] = BE_RX_RING_SIZE; + priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE; + priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE; + priv->addr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->addr)) { + error = PTR_ERR(priv->addr); + goto out_release; + } + + spin_lock_init(&priv->lock); + INIT_WORK(&priv->work, ravb_tx_timeout_work); + + priv->phy_interface = of_get_phy_mode(np); + + priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link"); + priv->avb_link_active_low = + of_property_read_bool(np, "renesas,ether-link-active-low"); + + /* Set function */ + ndev->netdev_ops = &ravb_netdev_ops; + ndev->ethtool_ops = &ravb_ethtool_ops; + + /* Set AVB config mode */ + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_OPC) | CCC_OPC_CONFIG, + CCC); + + /* Set CSEL value */ + ravb_write(ndev, (ravb_read(ndev, CCC) & ~CCC_CSEL) | CCC_CSEL_HPB, + CCC); + + /* Set GTI value */ + ravb_write(ndev, ((1000 << 20) / 130) & GTI_TIV, GTI); + + /* Request GTI loading */ + ravb_write(ndev, ravb_read(ndev, GCCR) | GCCR_LTI, GCCR); + + /* Allocate descriptor base address table */ + priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM; + priv->desc_bat = dma_alloc_coherent(NULL, priv->desc_bat_size, + &priv->desc_bat_dma, GFP_KERNEL); + if (!priv->desc_bat) { + dev_err(&ndev->dev, + "Cannot allocate desc base address table (size %d bytes)\n", + priv->desc_bat_size); + error = -ENOMEM; + goto out_release; + } + for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++) + priv->desc_bat[q].die_dt = DT_EOS; + ravb_write(ndev, priv->desc_bat_dma, DBAT); + + /* Initialise HW timestamp list */ + INIT_LIST_HEAD(&priv->ts_skb_list); + + /* Debug message level */ + priv->msg_enable = RAVB_DEF_MSG_ENABLE; + + /* Read and set MAC address */ + ravb_read_mac_address(ndev, of_get_mac_address(np)); + if (!is_valid_ether_addr(ndev->dev_addr)) { + dev_warn(&pdev->dev, + "no valid MAC address supplied, using a random one\n"); + eth_hw_addr_random(ndev); + } + + /* MDIO bus init */ + error = ravb_mdio_init(priv); + if (error) { + dev_err(&ndev->dev, "failed to initialize MDIO\n"); + goto out_dma_free; + } + + netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll, 64); + netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll, 64); + + /* Network device register */ + error = register_netdev(ndev); + if (error) + goto out_napi_del; + + /* Print device information */ + netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n", + (u32)ndev->base_addr, ndev->dev_addr, ndev->irq); + + platform_set_drvdata(pdev, ndev); + + return 0; + +out_napi_del: + netif_napi_del(&priv->napi[RAVB_NC]); + netif_napi_del(&priv->napi[RAVB_BE]); + ravb_mdio_release(priv); +out_dma_free: + dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat, + priv->desc_bat_dma); +out_release: + if (ndev) + free_netdev(ndev); + + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); + return error; +} + +static int ravb_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct ravb_private *priv = netdev_priv(ndev); + + dma_free_coherent(NULL, priv->desc_bat_size, priv->desc_bat, + priv->desc_bat_dma); + /* Set reset mode */ + ravb_write(ndev, CCC_OPC_RESET, CCC); + pm_runtime_put_sync(&pdev->dev); + unregister_netdev(ndev); + netif_napi_del(&priv->napi[RAVB_NC]); + netif_napi_del(&priv->napi[RAVB_BE]); + ravb_mdio_release(priv); + pm_runtime_disable(&pdev->dev); + free_netdev(ndev); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM +static int ravb_runtime_nop(struct device *dev) +{ + /* Runtime PM callback shared between ->runtime_suspend() + * and ->runtime_resume(). Simply returns success. + * + * This driver re-initializes all registers after + * pm_runtime_get_sync() anyway so there is no need + * to save and restore registers here. + */ + return 0; +} + +static const struct dev_pm_ops ravb_dev_pm_ops = { + .runtime_suspend = ravb_runtime_nop, + .runtime_resume = ravb_runtime_nop, +}; + +#define RAVB_PM_OPS (&ravb_dev_pm_ops) +#else +#define RAVB_PM_OPS NULL +#endif + +static const struct of_device_id ravb_match_table[] = { + { .compatible = "renesas,etheravb-r8a7790" }, + { .compatible = "renesas,etheravb-r8a7794" }, + { } +}; +MODULE_DEVICE_TABLE(of, ravb_match_table); + +static struct platform_driver ravb_driver = { + .probe = ravb_probe, + .remove = ravb_remove, + .driver = { + .name = "ravb", + .pm = RAVB_PM_OPS, + .of_match_table = ravb_match_table, + }, +}; + +module_platform_driver(ravb_driver); + +MODULE_AUTHOR("Mitsuhiro Kimura, Masaru Nagai"); +MODULE_DESCRIPTION("Renesas Ethernet AVB driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/net/ethernet/renesas/ravb_ptp.c b/drivers/net/ethernet/renesas/ravb_ptp.c new file mode 100644 index 000000000000..42656da50500 --- /dev/null +++ b/drivers/net/ethernet/renesas/ravb_ptp.c @@ -0,0 +1,357 @@ +/* PTP 1588 clock using the Renesas Ethernet AVB + * + * Copyright (C) 2013-2015 Renesas Electronics Corporation + * Copyright (C) 2015 Renesas Solutions Corp. + * Copyright (C) 2015 Cogent Embedded, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include "ravb.h" + +static int ravb_ptp_tcr_request(struct ravb_private *priv, u32 request) +{ + struct net_device *ndev = priv->ndev; + int error; + + error = ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ); + if (error) + return error; + + ravb_write(ndev, ravb_read(ndev, GCCR) | request, GCCR); + return ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ); +} + +/* Caller must hold the lock */ +static int ravb_ptp_time_read(struct ravb_private *priv, struct timespec64 *ts) +{ + struct net_device *ndev = priv->ndev; + int error; + + error = ravb_ptp_tcr_request(priv, GCCR_TCR_CAPTURE); + if (error) + return error; + + ts->tv_nsec = ravb_read(ndev, GCT0); + ts->tv_sec = ravb_read(ndev, GCT1) | + ((s64)ravb_read(ndev, GCT2) << 32); + + return 0; +} + +/* Caller must hold the lock */ +static int ravb_ptp_time_write(struct ravb_private *priv, + const struct timespec64 *ts) +{ + struct net_device *ndev = priv->ndev; + int error; + u32 gccr; + + error = ravb_ptp_tcr_request(priv, GCCR_TCR_RESET); + if (error) + return error; + + gccr = ravb_read(ndev, GCCR); + if (gccr & GCCR_LTO) + return -EBUSY; + ravb_write(ndev, ts->tv_nsec, GTO0); + ravb_write(ndev, ts->tv_sec, GTO1); + ravb_write(ndev, (ts->tv_sec >> 32) & 0xffff, GTO2); + ravb_write(ndev, gccr | GCCR_LTO, GCCR); + + return 0; +} + +/* Caller must hold the lock */ +static int ravb_ptp_update_compare(struct ravb_private *priv, u32 ns) +{ + struct net_device *ndev = priv->ndev; + /* When the comparison value (GPTC.PTCV) is in range of + * [x-1 to x+1] (x is the configured increment value in + * GTI.TIV), it may happen that a comparison match is + * not detected when the timer wraps around. + */ + u32 gti_ns_plus_1 = (priv->ptp.current_addend >> 20) + 1; + u32 gccr; + + if (ns < gti_ns_plus_1) + ns = gti_ns_plus_1; + else if (ns > 0 - gti_ns_plus_1) + ns = 0 - gti_ns_plus_1; + + gccr = ravb_read(ndev, GCCR); + if (gccr & GCCR_LPTC) + return -EBUSY; + ravb_write(ndev, ns, GPTC); + ravb_write(ndev, gccr | GCCR_LPTC, GCCR); + + return 0; +} + +/* PTP clock operations */ +static int ravb_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + struct net_device *ndev = priv->ndev; + unsigned long flags; + u32 diff, addend; + bool neg_adj = false; + u32 gccr; + + if (ppb < 0) { + neg_adj = true; + ppb = -ppb; + } + addend = priv->ptp.default_addend; + diff = div_u64((u64)addend * ppb, NSEC_PER_SEC); + + addend = neg_adj ? addend - diff : addend + diff; + + spin_lock_irqsave(&priv->lock, flags); + + priv->ptp.current_addend = addend; + + gccr = ravb_read(ndev, GCCR); + if (gccr & GCCR_LTI) + return -EBUSY; + ravb_write(ndev, addend & GTI_TIV, GTI); + ravb_write(ndev, gccr | GCCR_LTI, GCCR); + + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int ravb_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + struct timespec64 ts; + unsigned long flags; + int error; + + spin_lock_irqsave(&priv->lock, flags); + error = ravb_ptp_time_read(priv, &ts); + if (!error) { + u64 now = ktime_to_ns(timespec64_to_ktime(ts)); + + ts = ns_to_timespec64(now + delta); + error = ravb_ptp_time_write(priv, &ts); + } + spin_unlock_irqrestore(&priv->lock, flags); + + return error; +} + +static int ravb_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + unsigned long flags; + int error; + + spin_lock_irqsave(&priv->lock, flags); + error = ravb_ptp_time_read(priv, ts); + spin_unlock_irqrestore(&priv->lock, flags); + + return error; +} + +static int ravb_ptp_settime64(struct ptp_clock_info *ptp, + const struct timespec64 *ts) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + unsigned long flags; + int error; + + spin_lock_irqsave(&priv->lock, flags); + error = ravb_ptp_time_write(priv, ts); + spin_unlock_irqrestore(&priv->lock, flags); + + return error; +} + +static int ravb_ptp_extts(struct ptp_clock_info *ptp, + struct ptp_extts_request *req, int on) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + struct net_device *ndev = priv->ndev; + unsigned long flags; + u32 gic; + + if (req->index) + return -EINVAL; + + if (priv->ptp.extts[req->index] == on) + return 0; + priv->ptp.extts[req->index] = on; + + spin_lock_irqsave(&priv->lock, flags); + gic = ravb_read(ndev, GIC); + if (on) + gic |= GIC_PTCE; + else + gic &= ~GIC_PTCE; + ravb_write(ndev, gic, GIC); + mmiowb(); + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int ravb_ptp_perout(struct ptp_clock_info *ptp, + struct ptp_perout_request *req, int on) +{ + struct ravb_private *priv = container_of(ptp, struct ravb_private, + ptp.info); + struct net_device *ndev = priv->ndev; + struct ravb_ptp_perout *perout; + unsigned long flags; + int error = 0; + u32 gic; + + if (req->index) + return -EINVAL; + + if (on) { + u64 start_ns; + u64 period_ns; + + start_ns = req->start.sec * NSEC_PER_SEC + req->start.nsec; + period_ns = req->period.sec * NSEC_PER_SEC + req->period.nsec; + + if (start_ns > U32_MAX) { + netdev_warn(ndev, + "ptp: start value (nsec) is over limit. Maximum size of start is only 32 bits\n"); + return -ERANGE; + } + + if (period_ns > U32_MAX) { + netdev_warn(ndev, + "ptp: period value (nsec) is over limit. Maximum size of period is only 32 bits\n"); + return -ERANGE; + } + + spin_lock_irqsave(&priv->lock, flags); + + perout = &priv->ptp.perout[req->index]; + perout->target = (u32)start_ns; + perout->period = (u32)period_ns; + error = ravb_ptp_update_compare(priv, (u32)start_ns); + if (!error) { + /* Unmask interrupt */ + gic = ravb_read(ndev, GIC); + gic |= GIC_PTME; + ravb_write(ndev, gic, GIC); + } + } else { + spin_lock_irqsave(&priv->lock, flags); + + perout = &priv->ptp.perout[req->index]; + perout->period = 0; + + /* Mask interrupt */ + gic = ravb_read(ndev, GIC); + gic &= ~GIC_PTME; + ravb_write(ndev, gic, GIC); + } + mmiowb(); + spin_unlock_irqrestore(&priv->lock, flags); + + return error; +} + +static int ravb_ptp_enable(struct ptp_clock_info *ptp, + struct ptp_clock_request *req, int on) +{ + switch (req->type) { + case PTP_CLK_REQ_EXTTS: + return ravb_ptp_extts(ptp, &req->extts, on); + case PTP_CLK_REQ_PEROUT: + return ravb_ptp_perout(ptp, &req->perout, on); + default: + return -EOPNOTSUPP; + } +} + +static const struct ptp_clock_info ravb_ptp_info = { + .owner = THIS_MODULE, + .name = "ravb clock", + .max_adj = 50000000, + .n_ext_ts = N_EXT_TS, + .n_per_out = N_PER_OUT, + .adjfreq = ravb_ptp_adjfreq, + .adjtime = ravb_ptp_adjtime, + .gettime64 = ravb_ptp_gettime64, + .settime64 = ravb_ptp_settime64, + .enable = ravb_ptp_enable, +}; + +/* Caller must hold the lock */ +irqreturn_t ravb_ptp_interrupt(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + u32 gis = ravb_read(ndev, GIS); + + gis &= ravb_read(ndev, GIC); + if (gis & GIS_PTCF) { + struct ptp_clock_event event; + + event.type = PTP_CLOCK_EXTTS; + event.index = 0; + event.timestamp = ravb_read(ndev, GCPT); + ptp_clock_event(priv->ptp.clock, &event); + } + if (gis & GIS_PTMF) { + struct ravb_ptp_perout *perout = priv->ptp.perout; + + if (perout->period) { + perout->target += perout->period; + ravb_ptp_update_compare(priv, perout->target); + } + } + + if (gis) { + ravb_write(ndev, ~gis, GIS); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +void ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev) +{ + struct ravb_private *priv = netdev_priv(ndev); + unsigned long flags; + u32 gccr; + + priv->ptp.info = ravb_ptp_info; + + priv->ptp.default_addend = ravb_read(ndev, GTI); + priv->ptp.current_addend = priv->ptp.default_addend; + + spin_lock_irqsave(&priv->lock, flags); + ravb_wait(ndev, GCCR, GCCR_TCR, GCCR_TCR_NOREQ); + gccr = ravb_read(ndev, GCCR) & ~GCCR_TCSS; + ravb_write(ndev, gccr | GCCR_TCSS_ADJGPTP, GCCR); + mmiowb(); + spin_unlock_irqrestore(&priv->lock, flags); + + priv->ptp.clock = ptp_clock_register(&priv->ptp.info, &pdev->dev); +} + +void ravb_ptp_stop(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + ravb_write(ndev, 0, GIC); + ravb_write(ndev, 0, GIS); + + ptp_clock_unregister(priv->ptp.clock); +}