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- /* Renesas Ethernet AVB device driver
- *
- * Copyright (C) 2014-2015 Renesas Electronics Corporation
- * Copyright (C) 2015 Renesas Solutions Corp.
- * Copyright (C) 2015 Cogent Embedded, Inc. <source@cogentembedded.com>
- *
- * 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 <linux/cache.h>
- #include <linux/clk.h>
- #include <linux/delay.h>
- #include <linux/dma-mapping.h>
- #include <linux/err.h>
- #include <linux/etherdevice.h>
- #include <linux/ethtool.h>
- #include <linux/if_vlan.h>
- #include <linux/kernel.h>
- #include <linux/list.h>
- #include <linux/module.h>
- #include <linux/net_tstamp.h>
- #include <linux/of.h>
- #include <linux/of_device.h>
- #include <linux/of_irq.h>
- #include <linux/of_mdio.h>
- #include <linux/of_net.h>
- #include <linux/pm_runtime.h>
- #include <linux/slab.h>
- #include <linux/spinlock.h>
- #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 TX skb function for AVB-IP */
- static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
- {
- 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;
- u32 size;
- for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) {
- bool txed;
- entry = priv->dirty_tx[q] % (priv->num_tx_ring[q] *
- NUM_TX_DESC);
- desc = &priv->tx_ring[q][entry];
- txed = desc->die_dt == DT_FEMPTY;
- if (free_txed_only && !txed)
- 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 / NUM_TX_DESC]) {
- dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
- size, DMA_TO_DEVICE);
- /* Last packet descriptor? */
- if (entry % NUM_TX_DESC == NUM_TX_DESC - 1) {
- entry /= NUM_TX_DESC;
- dev_kfree_skb_any(priv->tx_skb[q][entry]);
- priv->tx_skb[q][entry] = NULL;
- if (txed)
- stats->tx_packets++;
- }
- free_num++;
- }
- if (txed)
- stats->tx_bytes += size;
- desc->die_dt = DT_EEMPTY;
- }
- return free_num;
- }
- /* 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;
- if (priv->rx_ring[q]) {
- for (i = 0; i < priv->num_rx_ring[q]; i++) {
- struct ravb_ex_rx_desc *desc = &priv->rx_ring[q][i];
- if (!dma_mapping_error(ndev->dev.parent,
- le32_to_cpu(desc->dptr)))
- dma_unmap_single(ndev->dev.parent,
- le32_to_cpu(desc->dptr),
- PKT_BUF_SZ,
- DMA_FROM_DEVICE);
- }
- ring_size = sizeof(struct ravb_ex_rx_desc) *
- (priv->num_rx_ring[q] + 1);
- dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q],
- priv->rx_desc_dma[q]);
- priv->rx_ring[q] = NULL;
- }
- if (priv->tx_ring[q]) {
- ravb_tx_free(ndev, q, false);
- ring_size = sizeof(struct ravb_tx_desc) *
- (priv->num_tx_ring[q] * NUM_TX_DESC + 1);
- dma_free_coherent(ndev->dev.parent, ring_size, priv->tx_ring[q],
- priv->tx_desc_dma[q]);
- priv->tx_ring[q] = NULL;
- }
- /* 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 aligned TX buffers */
- kfree(priv->tx_align[q]);
- priv->tx_align[q] = NULL;
- /* Free TX skb ringbuffer.
- * SKBs are freed by ravb_tx_free() call above.
- */
- kfree(priv->tx_skb[q]);
- priv->tx_skb[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;
- struct ravb_tx_desc *tx_desc;
- struct ravb_desc *desc;
- int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
- int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q] *
- NUM_TX_DESC;
- dma_addr_t dma_addr;
- 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++) {
- /* 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.parent, priv->rx_skb[q][i]->data,
- ALIGN(PKT_BUF_SZ, 16),
- DMA_FROM_DEVICE);
- /* We just set the data size to 0 for a failed mapping which
- * should prevent DMA from happening...
- */
- if (dma_mapping_error(ndev->dev.parent, dma_addr))
- rx_desc->ds_cc = cpu_to_le16(0);
- 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 */
- memset(priv->tx_ring[q], 0, tx_ring_size);
- /* Build TX ring buffer */
- for (i = 0, tx_desc = priv->tx_ring[q]; i < priv->num_tx_ring[q];
- i++, tx_desc++) {
- tx_desc->die_dt = DT_EEMPTY;
- tx_desc++;
- tx_desc->die_dt = DT_EEMPTY;
- }
- 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);
- struct sk_buff *skb;
- int ring_size;
- int i;
- /* 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;
- for (i = 0; i < priv->num_rx_ring[q]; i++) {
- skb = netdev_alloc_skb(ndev, PKT_BUF_SZ + RAVB_ALIGN - 1);
- if (!skb)
- goto error;
- ravb_set_buffer_align(skb);
- priv->rx_skb[q][i] = skb;
- }
- /* Allocate rings for the aligned buffers */
- priv->tx_align[q] = kmalloc(DPTR_ALIGN * priv->num_tx_ring[q] +
- DPTR_ALIGN - 1, GFP_KERNEL);
- if (!priv->tx_align[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(ndev->dev.parent, 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] * NUM_TX_DESC + 1);
- priv->tx_ring[q] = dma_alloc_coherent(ndev->dev.parent, 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 | 0x00112200, TGC);
- /* Timestamp enable */
- ravb_write(ndev, TCCR_TFEN, TCCR);
- /* Interrupt enable: */
- /* Frame receive */
- ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0);
- /* 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;
- }
- 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;
- u8 desc_status;
- u16 pkt_len;
- 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;
- /* We use 0-byte descriptors to mark the DMA mapping errors */
- if (!pkt_len)
- continue;
- 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_unmap_single(ndev->dev.parent, 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_addr = dma_map_single(ndev->dev.parent, skb->data,
- le16_to_cpu(desc->ds_cc),
- DMA_FROM_DEVICE);
- skb_checksum_none_assert(skb);
- /* We just set the data size to 0 for a failed mapping
- * which should prevent DMA from happening...
- */
- if (dma_mapping_error(ndev->dev.parent, dma_addr))
- desc->ds_cc = cpu_to_le16(0);
- 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 */
- ric0 &= ~BIT(q);
- tic &= ~BIT(q);
- ravb_write(ndev, ric0, RIC0);
- ravb_write(ndev, tic, 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, true);
- 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;
- if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors)
- ndev->stats.rx_fifo_errors = priv->rx_fifo_errors;
- 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;
- }
- /* This driver only support 10/100Mbit speeds on Gen3
- * at this time.
- */
- if (priv->chip_id == RCAR_GEN3) {
- int err;
- err = phy_set_max_speed(phydev, SPEED_100);
- if (err) {
- netdev_err(ndev, "failed to limit PHY to 100Mbit/s\n");
- phy_disconnect(phydev);
- return err;
- }
- netdev_info(ndev, "limited PHY to 100Mbit/s\n");
- }
- /* 10BASE is not supported */
- phydev->supported &= ~PHY_10BT_FEATURES;
- 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;
- }
- if (priv->chip_id == RCAR_GEN3) {
- error = request_irq(priv->emac_irq, ravb_interrupt,
- IRQF_SHARED, ndev->name, ndev);
- if (error) {
- netdev_err(ndev, "cannot request IRQ\n");
- goto out_free_irq;
- }
- }
- /* Device init */
- error = ravb_dmac_init(ndev);
- if (error)
- goto out_free_irq2;
- 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_irq2:
- if (priv->chip_id == RCAR_GEN3)
- free_irq(priv->emac_irq, 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);
- u16 q = skb_get_queue_mapping(skb);
- struct ravb_tstamp_skb *ts_skb;
- struct ravb_tx_desc *desc;
- unsigned long flags;
- u32 dma_addr;
- void *buffer;
- u32 entry;
- u32 len;
- spin_lock_irqsave(&priv->lock, flags);
- if (priv->cur_tx[q] - priv->dirty_tx[q] > (priv->num_tx_ring[q] - 1) *
- NUM_TX_DESC) {
- 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] * NUM_TX_DESC);
- priv->tx_skb[q][entry / NUM_TX_DESC] = skb;
- if (skb_put_padto(skb, ETH_ZLEN))
- goto drop;
- buffer = PTR_ALIGN(priv->tx_align[q], DPTR_ALIGN) +
- entry / NUM_TX_DESC * DPTR_ALIGN;
- len = PTR_ALIGN(skb->data, DPTR_ALIGN) - skb->data;
- /* Zero length DMA descriptors are problematic as they seem to
- * terminate DMA transfers. Avoid them by simply using a length of
- * DPTR_ALIGN (4) when skb data is aligned to DPTR_ALIGN.
- *
- * As skb is guaranteed to have at least ETH_ZLEN (60) bytes of
- * data by the call to skb_put_padto() above this is safe with
- * respect to both the length of the first DMA descriptor (len)
- * overflowing the available data and the length of the second DMA
- * descriptor (skb->len - len) being negative.
- */
- if (len == 0)
- len = DPTR_ALIGN;
- memcpy(buffer, skb->data, len);
- dma_addr = dma_map_single(ndev->dev.parent, buffer, len, DMA_TO_DEVICE);
- if (dma_mapping_error(ndev->dev.parent, dma_addr))
- goto drop;
- desc = &priv->tx_ring[q][entry];
- desc->ds_tagl = cpu_to_le16(len);
- desc->dptr = cpu_to_le32(dma_addr);
- buffer = skb->data + len;
- len = skb->len - len;
- dma_addr = dma_map_single(ndev->dev.parent, buffer, len, DMA_TO_DEVICE);
- if (dma_mapping_error(ndev->dev.parent, dma_addr))
- goto unmap;
- desc++;
- desc->ds_tagl = cpu_to_le16(len);
- 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) {
- desc--;
- dma_unmap_single(ndev->dev.parent, dma_addr, len,
- DMA_TO_DEVICE);
- goto unmap;
- }
- 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_FEND;
- desc--;
- desc->die_dt = DT_FSTART;
- ravb_write(ndev, ravb_read(ndev, TCCR) | (TCCR_TSRQ0 << q), TCCR);
- priv->cur_tx[q] += NUM_TX_DESC;
- if (priv->cur_tx[q] - priv->dirty_tx[q] >
- (priv->num_tx_ring[q] - 1) * NUM_TX_DESC &&
- !ravb_tx_free(ndev, q, true))
- netif_stop_subqueue(ndev, q);
- exit:
- mmiowb();
- spin_unlock_irqrestore(&priv->lock, flags);
- return NETDEV_TX_OK;
- unmap:
- dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
- le16_to_cpu(desc->ds_tagl), DMA_TO_DEVICE);
- drop:
- dev_kfree_skb_any(skb);
- priv->tx_skb[q][entry / NUM_TX_DESC] = 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 const struct of_device_id ravb_match_table[] = {
- { .compatible = "renesas,etheravb-r8a7790", .data = (void *)RCAR_GEN2 },
- { .compatible = "renesas,etheravb-r8a7794", .data = (void *)RCAR_GEN2 },
- { .compatible = "renesas,etheravb-r8a7795", .data = (void *)RCAR_GEN3 },
- { }
- };
- MODULE_DEVICE_TABLE(of, ravb_match_table);
- static int ravb_probe(struct platform_device *pdev)
- {
- struct device_node *np = pdev->dev.of_node;
- const struct of_device_id *match;
- struct ravb_private *priv;
- enum ravb_chip_id chip_id;
- 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;
- match = of_match_device(of_match_ptr(ravb_match_table), &pdev->dev);
- chip_id = (enum ravb_chip_id)match->data;
- if (chip_id == RCAR_GEN3)
- irq = platform_get_irq_byname(pdev, "ch22");
- else
- irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- error = irq;
- 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");
- if (chip_id == RCAR_GEN3) {
- irq = platform_get_irq_byname(pdev, "ch24");
- if (irq < 0) {
- error = irq;
- goto out_release;
- }
- priv->emac_irq = irq;
- }
- priv->chip_id = chip_id;
- /* 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(ndev->dev.parent, priv->desc_bat_size,
- &priv->desc_bat_dma, GFP_KERNEL);
- if (!priv->desc_bat) {
- dev_err(&pdev->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(&pdev->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(ndev->dev.parent, 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(ndev->dev.parent, 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 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");
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