// SPDX-License-Identifier: GPL-2.0
/* Renesas Ethernet AVB device driver
*
* Copyright (C) 2014-2019 Renesas Electronics Corporation
* Copyright (C) 2015 Renesas Solutions Corp.
* Copyright (C) 2015-2016 Cogent Embedded, Inc. <[email protected]>
*
* Based on the SuperH Ethernet driver
*/
#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_mdio.h>
#include <linux/of_net.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/reset.h>
#include <linux/math64.h>
#include <net/ip.h>
#include <net/page_pool/helpers.h>
#include "ravb.h"
#define RAVB_DEF_MSG_ENABLE \
(NETIF_MSG_LINK | \
NETIF_MSG_TIMER | \
NETIF_MSG_RX_ERR | \
NETIF_MSG_TX_ERR)
void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,
u32 set)
{
ravb_write(ndev, (ravb_read(ndev, reg) & ~clear) | set, reg);
}
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_set_opmode(struct net_device *ndev, u32 opmode)
{
u32 csr_ops = 1U << (opmode & CCC_OPC);
u32 ccc_mask = CCC_OPC;
int error;
/* If gPTP active in config mode is supported it needs to be configured
* along with CSEL and operating mode in the same access. This is a
* hardware limitation.
*/
if (opmode & CCC_GAC)
ccc_mask |= CCC_GAC | CCC_CSEL;
/* Set operating mode */
ravb_modify(ndev, CCC, ccc_mask, opmode);
/* Check if the operating mode is changed to the requested one */
error = ravb_wait(ndev, CSR, CSR_OPS, csr_ops);
if (error) {
netdev_err(ndev, "failed to switch device to requested mode (%u)\n",
opmode & CCC_OPC);
}
return error;
}
static void ravb_set_rate_gbeth(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
switch (priv->speed) {
case 10: /* 10BASE */
ravb_write(ndev, GBETH_GECMR_SPEED_10, GECMR);
break;
case 100: /* 100BASE */
ravb_write(ndev, GBETH_GECMR_SPEED_100, GECMR);
break;
case 1000: /* 1000BASE */
ravb_write(ndev, GBETH_GECMR_SPEED_1000, GECMR);
break;
}
}
static void ravb_set_rate_rcar(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;
}
}
/* 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 device_node *np,
struct net_device *ndev)
{
int ret;
ret = of_get_ethdev_address(np, ndev);
if (ret) {
u32 mahr = ravb_read(ndev, MAHR);
u32 malr = ravb_read(ndev, MALR);
u8 addr[ETH_ALEN];
addr[0] = (mahr >> 24) & 0xFF;
addr[1] = (mahr >> 16) & 0xFF;
addr[2] = (mahr >> 8) & 0xFF;
addr[3] = (mahr >> 0) & 0xFF;
addr[4] = (malr >> 8) & 0xFF;
addr[5] = (malr >> 0) & 0xFF;
eth_hw_addr_set(ndev, addr);
}
}
static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set)
{
struct ravb_private *priv = container_of(ctrl, struct ravb_private,
mdiobb);
ravb_modify(priv->ndev, PIR, mask, set ? mask : 0);
}
/* 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 const 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,
};
static struct ravb_rx_desc *
ravb_rx_get_desc(struct ravb_private *priv, unsigned int q,
unsigned int i)
{
return priv->rx_ring[q].raw + priv->info->rx_desc_size * i;
}
/* 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];
unsigned int num_tx_desc = priv->num_tx_desc;
struct ravb_tx_desc *desc;
unsigned int entry;
int free_num = 0;
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;
}
static void ravb_rx_ring_free(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
unsigned int ring_size;
if (!priv->rx_ring[q].raw)
return;
ring_size = priv->info->rx_desc_size * (priv->num_rx_ring[q] + 1);
dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q].raw,
priv->rx_desc_dma[q]);
priv->rx_ring[q].raw = NULL;
}
/* 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);
unsigned int num_tx_desc = priv->num_tx_desc;
unsigned int ring_size;
unsigned int i;
ravb_rx_ring_free(ndev, q);
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 buffers */
for (i = 0; i < priv->num_rx_ring[q]; i++) {
if (priv->rx_buffers[q][i].page)
page_pool_put_page(priv->rx_pool[q],
priv->rx_buffers[q][i].page,
0, true);
}
kfree(priv->rx_buffers[q]);
priv->rx_buffers[q] = NULL;
page_pool_destroy(priv->rx_pool[q]);
/* 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;
}
static int
ravb_alloc_rx_buffer(struct net_device *ndev, int q, u32 entry, gfp_t gfp_mask,
struct ravb_rx_desc *rx_desc)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct ravb_rx_buffer *rx_buff;
dma_addr_t dma_addr;
unsigned int size;
rx_buff = &priv->rx_buffers[q][entry];
size = info->rx_buffer_size;
rx_buff->page = page_pool_alloc(priv->rx_pool[q], &rx_buff->offset,
&size, gfp_mask);
if (unlikely(!rx_buff->page)) {
/* We just set the data size to 0 for a failed mapping which
* should prevent DMA from happening...
*/
rx_desc->ds_cc = cpu_to_le16(0);
return -ENOMEM;
}
dma_addr = page_pool_get_dma_addr(rx_buff->page) + rx_buff->offset;
dma_sync_single_for_device(ndev->dev.parent, dma_addr,
info->rx_buffer_size, DMA_FROM_DEVICE);
rx_desc->dptr = cpu_to_le32(dma_addr);
/* The end of the RX buffer is used to store skb shared data, so we need
* to ensure that the hardware leaves enough space for this.
*/
rx_desc->ds_cc = cpu_to_le16(info->rx_buffer_size -
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) -
ETH_FCS_LEN + sizeof(__sum16));
return 0;
}
static u32
ravb_rx_ring_refill(struct net_device *ndev, int q, u32 count, gfp_t gfp_mask)
{
struct ravb_private *priv = netdev_priv(ndev);
struct ravb_rx_desc *rx_desc;
u32 i, entry;
for (i = 0; i < count; i++) {
entry = (priv->dirty_rx[q] + i) % priv->num_rx_ring[q];
rx_desc = ravb_rx_get_desc(priv, q, entry);
if (!priv->rx_buffers[q][entry].page) {
if (unlikely(ravb_alloc_rx_buffer(ndev, q, entry,
gfp_mask, rx_desc)))
break;
}
/* Descriptor type must be set after all the above writes */
dma_wmb();
rx_desc->die_dt = DT_FEMPTY;
}
return i;
}
/* 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);
unsigned int num_tx_desc = priv->num_tx_desc;
struct ravb_rx_desc *rx_desc;
struct ravb_tx_desc *tx_desc;
struct ravb_desc *desc;
unsigned int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q] *
num_tx_desc;
unsigned int i;
priv->cur_rx[q] = 0;
priv->cur_tx[q] = 0;
priv->dirty_rx[q] = 0;
priv->dirty_tx[q] = 0;
/* Regular RX descriptors have already been initialized by
* ravb_rx_ring_refill(), we just need to initialize the final link
* descriptor.
*/
rx_desc = ravb_rx_get_desc(priv, q, priv->num_rx_ring[q]);
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;
if (num_tx_desc > 1) {
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]);
}
static void *ravb_alloc_rx_desc(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
unsigned int ring_size;
ring_size = priv->info->rx_desc_size * (priv->num_rx_ring[q] + 1);
priv->rx_ring[q].raw = dma_alloc_coherent(ndev->dev.parent, ring_size,
&priv->rx_desc_dma[q],
GFP_KERNEL);
return priv->rx_ring[q].raw;
}
/* 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);
unsigned int num_tx_desc = priv->num_tx_desc;
struct page_pool_params params = {
.order = 0,
.flags = PP_FLAG_DMA_MAP,
.pool_size = priv->num_rx_ring[q],
.nid = NUMA_NO_NODE,
.dev = ndev->dev.parent,
.dma_dir = DMA_FROM_DEVICE,
};
unsigned int ring_size;
u32 num_filled;
/* Allocate RX page pool and buffers */
priv->rx_pool[q] = page_pool_create(¶ms);
if (IS_ERR(priv->rx_pool[q]))
goto error;
/* Allocate RX buffers */
priv->rx_buffers[q] = kcalloc(priv->num_rx_ring[q],
sizeof(*priv->rx_buffers[q]), GFP_KERNEL);
if (!priv->rx_buffers[q])
goto error;
/* Allocate TX skb rings */
priv->tx_skb[q] = kcalloc(priv->num_tx_ring[q],
sizeof(*priv->tx_skb[q]), GFP_KERNEL);
if (!priv->tx_skb[q])
goto error;
/* Allocate all RX descriptors. */
if (!ravb_alloc_rx_desc(ndev, q))
goto error;
/* Populate RX ring buffer. */
priv->dirty_rx[q] = 0;
ring_size = priv->info->rx_desc_size * priv->num_rx_ring[q];
memset(priv->rx_ring[q].raw, 0, ring_size);
num_filled = ravb_rx_ring_refill(ndev, q, priv->num_rx_ring[q],
GFP_KERNEL);
if (num_filled != priv->num_rx_ring[q])
goto error;
if (num_tx_desc > 1) {
/* 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 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;
}
static void ravb_csum_init_gbeth(struct net_device *ndev)
{
bool tx_enable = ndev->features & NETIF_F_HW_CSUM;
bool rx_enable = ndev->features & NETIF_F_RXCSUM;
if (!(tx_enable || rx_enable))
goto done;
ravb_write(ndev, 0, CSR0);
if (ravb_wait(ndev, CSR0, CSR0_TPE | CSR0_RPE, 0)) {
netdev_err(ndev, "Timeout enabling hardware checksum\n");
if (tx_enable)
ndev->features &= ~NETIF_F_HW_CSUM;
if (rx_enable)
ndev->features &= ~NETIF_F_RXCSUM;
} else {
if (tx_enable)
ravb_write(ndev, CSR1_TIP4 | CSR1_TTCP4 | CSR1_TUDP4, CSR1);
if (rx_enable)
ravb_write(ndev, CSR2_RIP4 | CSR2_RTCP4 | CSR2_RUDP4 | CSR2_RICMP4,
CSR2);
}
done:
ravb_write(ndev, CSR0_TPE | CSR0_RPE, CSR0);
}
static void ravb_emac_init_gbeth(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
if (priv->phy_interface == PHY_INTERFACE_MODE_MII) {
ravb_write(ndev, (1000 << 16) | CXR35_SEL_XMII_MII, CXR35);
ravb_modify(ndev, CXR31, CXR31_SEL_LINK0 | CXR31_SEL_LINK1, 0);
} else {
ravb_write(ndev, (1000 << 16) | CXR35_SEL_XMII_RGMII, CXR35);
ravb_modify(ndev, CXR31, CXR31_SEL_LINK0 | CXR31_SEL_LINK1,
CXR31_SEL_LINK0);
}
/* Receive frame limit set register */
ravb_write(ndev, priv->info->rx_max_frame_size + ETH_FCS_LEN, RFLR);
/* EMAC Mode: PAUSE prohibition; Duplex; TX; RX; CRC Pass Through */
ravb_write(ndev, ECMR_ZPF | ((priv->duplex > 0) ? ECMR_DM : 0) |
ECMR_TE | ECMR_RE | ECMR_RCPT |
ECMR_TXF | ECMR_RXF, ECMR);
ravb_set_rate_gbeth(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);
/* E-MAC status register clear */
ravb_write(ndev, ECSR_ICD | ECSR_LCHNG | ECSR_PFRI, ECSR);
ravb_csum_init_gbeth(ndev);
/* E-MAC interrupt enable register */
ravb_write(ndev, ECSIPR_ICDIP, ECSIPR);
}
static void ravb_emac_init_rcar(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
/* Set receive frame length
*
* The length set here describes the frame from the destination address
* up to and including the CRC data. However only the frame data,
* excluding the CRC, are transferred to memory. To allow for the
* largest frames add the CRC length to the maximum Rx descriptor size.
*/
ravb_write(ndev, priv->info->rx_max_frame_size + ETH_FCS_LEN, RFLR);
/* EMAC Mode: PAUSE prohibition; Duplex; RX Checksum; TX; RX */
ravb_write(ndev, ECMR_ZPF | ECMR_DM |
(ndev->features & NETIF_F_RXCSUM ? ECMR_RCSC : 0) |
ECMR_TE | ECMR_RE, ECMR);
ravb_set_rate_rcar(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);
/* 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);
}
static void ravb_emac_init_rcar_gen4(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
bool mii = priv->phy_interface == PHY_INTERFACE_MODE_MII;
ravb_modify(ndev, APSR, APSR_MIISELECT, mii ? APSR_MIISELECT : 0);
ravb_emac_init_rcar(ndev);
}
/* E-MAC init function */
static void ravb_emac_init(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
info->emac_init(ndev);
}
static int ravb_dmac_init_gbeth(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
int error;
error = ravb_ring_init(ndev, RAVB_BE);
if (error)
return error;
/* Descriptor format */
ravb_ring_format(ndev, RAVB_BE);
/* Set DMAC RX */
ravb_write(ndev, 0x60000000, RCR);
/* Set Max Frame Length (RTC) */
ravb_write(ndev, 0x7ffc0000 | priv->info->rx_max_frame_size, RTC);
/* Set FIFO size */
ravb_write(ndev, 0x00222200, TGC);
ravb_write(ndev, 0, TCCR);
/* Frame receive */
ravb_write(ndev, RIC0_FRE0, RIC0);
/* Disable FIFO full warning */
ravb_write(ndev, 0x0, RIC1);
/* Receive FIFO full error, descriptor empty */
ravb_write(ndev, RIC2_QFE0 | RIC2_RFFE, RIC2);
ravb_write(ndev, TIC_FTE0, TIC);
return 0;
}
static int ravb_dmac_init_rcar(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
int 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);
/* Set AVB RX */
ravb_write(ndev,
RCR_EFFS | RCR_ENCF | RCR_ETS0 | RCR_ESF | 0x18000000, RCR);
/* Set FIFO size */
ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00112200, TGC);
/* Timestamp enable */
ravb_write(ndev, TCCR_TFEN, TCCR);
/* Interrupt init: */
if (info->multi_irqs) {
/* Clear DIL.DPLx */
ravb_write(ndev, 0, DIL);
/* Set queue specific interrupt */
ravb_write(ndev, CIE_CRIE | CIE_CTIE | CIE_CL0M, CIE);
}
/* Frame receive */
ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0);
/* Disable FIFO full warning */
ravb_write(ndev, 0, 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);
return 0;
}
/* Device init function for Ethernet AVB */
static int ravb_dmac_init(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
int error;
/* Set CONFIG mode */
error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
if (error)
return error;
error = info->dmac_init(ndev);
if (error)
return error;
/* Setting the control will start the AVB-DMAC process. */
return ravb_set_opmode(ndev, CCC_OPC_OPERATION);
}
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);
dev_consume_skb_any(skb);
break;
} else {
dev_kfree_skb_any(skb);
}
}
ravb_modify(ndev, TCCR, TCCR_TFR, TCCR_TFR);
}
}
static void ravb_rx_csum_gbeth(struct sk_buff *skb)
{
struct skb_shared_info *shinfo = skb_shinfo(skb);
__wsum csum_ip_hdr, csum_proto;
skb_frag_t *last_frag;
u8 *hw_csum;
/* The hardware checksum status is contained in sizeof(__sum16) * 2 = 4
* bytes appended to packet data. First 2 bytes is ip header checksum
* and last 2 bytes is protocol checksum.
*/
if (unlikely(skb->len < sizeof(__sum16) * 2))
return;
if (skb_is_nonlinear(skb)) {
last_frag = &shinfo->frags[shinfo->nr_frags - 1];
hw_csum = skb_frag_address(last_frag) +
skb_frag_size(last_frag);
} else {
hw_csum = skb_tail_pointer(skb);
}
hw_csum -= sizeof(__sum16);
csum_proto = csum_unfold((__force __sum16)get_unaligned_le16(hw_csum));
hw_csum -= sizeof(__sum16);
csum_ip_hdr = csum_unfold((__force __sum16)get_unaligned_le16(hw_csum));
if (skb_is_nonlinear(skb))
skb_frag_size_sub(last_frag, 2 * sizeof(__sum16));
else
skb_trim(skb, skb->len - 2 * sizeof(__sum16));
/* TODO: IPV6 Rx checksum */
if (skb->protocol == htons(ETH_P_IP) && !csum_ip_hdr && !csum_proto)
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
static void ravb_rx_csum(struct sk_buff *skb)
{
u8 *hw_csum;
/* The hardware checksum is contained in sizeof(__sum16) (2) bytes
* appended to packet data
*/
if (unlikely(skb->len < sizeof(__sum16)))
return;
hw_csum = skb_tail_pointer(skb) - sizeof(__sum16);
skb->csum = csum_unfold((__force __sum16)get_unaligned_le16(hw_csum));
skb->ip_summed = CHECKSUM_COMPLETE;
skb_trim(skb, skb->len - sizeof(__sum16));
}
/* Packet receive function for Gigabit Ethernet */
static int ravb_rx_gbeth(struct net_device *ndev, int budget, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct net_device_stats *stats;
struct ravb_rx_desc *desc;
struct sk_buff *skb;
int rx_packets = 0;
u8 desc_status;
u16 desc_len;
u8 die_dt;
int entry;
int limit;
int i;
limit = priv->dirty_rx[q] + priv->num_rx_ring[q] - priv->cur_rx[q];
stats = &priv->stats[q];
for (i = 0; i < limit; i++, priv->cur_rx[q]++) {
entry = priv->cur_rx[q] % priv->num_rx_ring[q];
desc = &priv->rx_ring[q].desc[entry];
if (rx_packets == budget || desc->die_dt == DT_FEMPTY)
break;
/* Descriptor type must be checked before all other reads */
dma_rmb();
desc_status = desc->msc;
desc_len = le16_to_cpu(desc->ds_cc) & RX_DS;
/* We use 0-byte descriptors to mark the DMA mapping errors */
if (!desc_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 {
struct ravb_rx_buffer *rx_buff;
void *rx_addr;
rx_buff = &priv->rx_buffers[q][entry];
rx_addr = page_address(rx_buff->page) + rx_buff->offset;
die_dt = desc->die_dt & 0xF0;
dma_sync_single_for_cpu(ndev->dev.parent,
le32_to_cpu(desc->dptr),
desc_len, DMA_FROM_DEVICE);
switch (die_dt) {
case DT_FSINGLE:
case DT_FSTART:
/* Start of packet: Set initial data length. */
skb = napi_build_skb(rx_addr,
info->rx_buffer_size);
if (unlikely(!skb)) {
stats->rx_errors++;
page_pool_put_page(priv->rx_pool[q],
rx_buff->page, 0,
true);
goto refill;
}
skb_mark_for_recycle(skb);
skb_put(skb, desc_len);
/* Save this skb if the packet spans multiple
* descriptors.
*/
if (die_dt == DT_FSTART)
priv->rx_1st_skb = skb;
break;
case DT_FMID:
case DT_FEND:
/* Continuing a packet: Add this buffer as an RX
* frag.
*/
/* rx_1st_skb will be NULL if napi_build_skb()
* failed for the first descriptor of a
* multi-descriptor packet.
*/
if (unlikely(!priv->rx_1st_skb)) {
stats->rx_errors++;
page_pool_put_page(priv->rx_pool[q],
rx_buff->page, 0,
true);
/* We may find a DT_FSINGLE or DT_FSTART
* descriptor in the queue which we can
* process, so don't give up yet.
*/
continue;
}
skb_add_rx_frag(priv->rx_1st_skb,
skb_shinfo(priv->rx_1st_skb)->nr_frags,
rx_buff->page, rx_buff->offset,
desc_len, info->rx_buffer_size);
/* Set skb to point at the whole packet so that
* we only need one code path for finishing a
* packet.
*/
skb = priv->rx_1st_skb;
}
switch (die_dt) {
case DT_FSINGLE:
case DT_FEND:
/* Finishing a packet: Determine protocol &
* checksum, hand off to NAPI and update our
* stats.
*/
skb->protocol = eth_type_trans(skb, ndev);
if (ndev->features & NETIF_F_RXCSUM)
ravb_rx_csum_gbeth(skb);
stats->rx_bytes += skb->len;
napi_gro_receive(&priv->napi[q], skb);
rx_packets++;
/* Clear rx_1st_skb so that it will only be
* non-NULL when valid.
*/
priv->rx_1st_skb = NULL;
}
/* Mark this RX buffer as consumed. */
rx_buff->page = NULL;
}
}
refill:
/* Refill the RX ring buffers. */
priv->dirty_rx[q] += ravb_rx_ring_refill(ndev, q,
priv->cur_rx[q] - priv->dirty_rx[q],
GFP_ATOMIC);
stats->rx_packets += rx_packets;
return rx_packets;
}
/* Packet receive function for Ethernet AVB */
static int ravb_rx_rcar(struct net_device *ndev, int budget, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct net_device_stats *stats = &priv->stats[q];
struct ravb_ex_rx_desc *desc;
unsigned int limit, i;
struct sk_buff *skb;
struct timespec64 ts;
int rx_packets = 0;
u8 desc_status;
u16 pkt_len;
int entry;
limit = priv->dirty_rx[q] + priv->num_rx_ring[q] - priv->cur_rx[q];
for (i = 0; i < limit; i++, priv->cur_rx[q]++) {
entry = priv->cur_rx[q] % priv->num_rx_ring[q];
desc = &priv->rx_ring[q].ex_desc[entry];
if (rx_packets == budget || desc->die_dt == DT_FEMPTY)
break;
/* 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;
/* 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;
struct ravb_rx_buffer *rx_buff;
void *rx_addr;
rx_buff = &priv->rx_buffers[q][entry];
rx_addr = page_address(rx_buff->page) + rx_buff->offset;
dma_sync_single_for_cpu(ndev->dev.parent,
le32_to_cpu(desc->dptr),
pkt_len, DMA_FROM_DEVICE);
skb = napi_build_skb(rx_addr, info->rx_buffer_size);
if (unlikely(!skb)) {
stats->rx_errors++;
page_pool_put_page(priv->rx_pool[q],
rx_buff->page, 0, true);
break;
}
skb_mark_for_recycle(skb);
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);
if (ndev->features & NETIF_F_RXCSUM)
ravb_rx_csum(skb);
napi_gro_receive(&priv->napi[q], skb);
rx_packets++;
stats->rx_bytes += pkt_len;
/* Mark this RX buffer as consumed. */
rx_buff->page = NULL;
}
}
/* Refill the RX ring buffers. */
priv->dirty_rx[q] += ravb_rx_ring_refill(ndev, q,
priv->cur_rx[q] - priv->dirty_rx[q],
GFP_ATOMIC);
stats->rx_packets += rx_packets;
return rx_packets;
}
/* Packet receive function for Ethernet AVB */
static int ravb_rx(struct net_device *ndev, int budget, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
return info->receive(ndev, budget, q);
}
static void ravb_rcv_snd_disable(struct net_device *ndev)
{
/* Disable TX and RX */
ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, 0);
}
static void ravb_rcv_snd_enable(struct net_device *ndev)
{
/* Enable TX and RX */
ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, ECMR_RE | ECMR_TE);
}
/* function for waiting dma process finished */
static int ravb_stop_dma(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
int error;
/* Wait for stopping the hardware TX process */
error = ravb_wait(ndev, TCCR, info->tccr_mask, 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_set_opmode(ndev, CCC_OPC_CONFIG);
}
/* E-MAC interrupt handler */
static void ravb_emac_interrupt_unlocked(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_MPD)
pm_wakeup_event(&priv->pdev->dev, 0);
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);
}
}
}
static irqreturn_t ravb_emac_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct ravb_private *priv = netdev_priv(ndev);
struct device *dev = &priv->pdev->dev;
irqreturn_t result = IRQ_HANDLED;
pm_runtime_get_noresume(dev);
if (unlikely(!pm_runtime_active(dev))) {
result = IRQ_NONE;
goto out_rpm_put;
}
spin_lock(&priv->lock);
ravb_emac_interrupt_unlocked(ndev);
spin_unlock(&priv->lock);
out_rpm_put:
pm_runtime_put_noidle(dev);
return result;
}
/* 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_RESERVED), EIS);
if (eis & EIS_QFS) {
ris2 = ravb_read(ndev, RIS2);
ravb_write(ndev, ~(RIS2_QFF0 | RIS2_QFF1 | RIS2_RFFF | RIS2_RESERVED),
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 bool ravb_queue_interrupt(struct net_device *ndev, int q)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
u32 ris0 = ravb_read(ndev, RIS0);
u32 ric0 = ravb_read(ndev, RIC0);
u32 tis = ravb_read(ndev, TIS);
u32 tic = ravb_read(ndev, TIC);
if (((ris0 & ric0) & BIT(q)) || ((tis & tic) & BIT(q))) {
if (napi_schedule_prep(&priv->napi[q])) {
/* Mask RX and TX interrupts */
if (!info->irq_en_dis) {
ravb_write(ndev, ric0 & ~BIT(q), RIC0);
ravb_write(ndev, tic & ~BIT(q), TIC);
} else {
ravb_write(ndev, BIT(q), RID0);
ravb_write(ndev, BIT(q), TID);
}
__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);
}
return true;
}
return false;
}
static bool ravb_timestamp_interrupt(struct net_device *ndev)
{
u32 tis = ravb_read(ndev, TIS);
if (tis & TIS_TFUF) {
ravb_write(ndev, ~(TIS_TFUF | TIS_RESERVED), TIS);
ravb_get_tx_tstamp(ndev);
return true;
}
return false;
}
static irqreturn_t ravb_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct device *dev = &priv->pdev->dev;
irqreturn_t result = IRQ_NONE;
u32 iss;
pm_runtime_get_noresume(dev);
if (unlikely(!pm_runtime_active(dev)))
goto out_rpm_put;
spin_lock(&priv->lock);
/* Get interrupt status */
iss = ravb_read(ndev, ISS);
/* Received and transmitted interrupts */
if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) {
int q;
/* Timestamp updated */
if (ravb_timestamp_interrupt(ndev))
result = IRQ_HANDLED;
/* Network control and best effort queue RX/TX */
if (info->nc_queues) {
for (q = RAVB_NC; q >= RAVB_BE; q--) {
if (ravb_queue_interrupt(ndev, q))
result = IRQ_HANDLED;
}
} else {
if (ravb_queue_interrupt(ndev, RAVB_BE))
result = IRQ_HANDLED;
}
}
/* E-MAC status summary */
if (iss & ISS_MS) {
ravb_emac_interrupt_unlocked(ndev);
result = IRQ_HANDLED;
}
/* Error status summary */
if (iss & ISS_ES) {
ravb_error_interrupt(ndev);
result = IRQ_HANDLED;
}
/* gPTP interrupt status summary */
if (iss & ISS_CGIS) {
ravb_ptp_interrupt(ndev);
result = IRQ_HANDLED;
}
spin_unlock(&priv->lock);
out_rpm_put:
pm_runtime_put_noidle(dev);
return result;
}
/* Timestamp/Error/gPTP interrupt handler */
static irqreturn_t ravb_multi_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct ravb_private *priv = netdev_priv(ndev);
struct device *dev = &priv->pdev->dev;
irqreturn_t result = IRQ_NONE;
u32 iss;
pm_runtime_get_noresume(dev);
if (unlikely(!pm_runtime_active(dev)))
goto out_rpm_put;
spin_lock(&priv->lock);
/* Get interrupt status */
iss = ravb_read(ndev, ISS);
/* Timestamp updated */
if ((iss & ISS_TFUS) && ravb_timestamp_interrupt(ndev))
result = IRQ_HANDLED;
/* Error status summary */
if (iss & ISS_ES) {
ravb_error_interrupt(ndev);
result = IRQ_HANDLED;
}
/* gPTP interrupt status summary */
if (iss & ISS_CGIS) {
ravb_ptp_interrupt(ndev);
result = IRQ_HANDLED;
}
spin_unlock(&priv->lock);
out_rpm_put:
pm_runtime_put_noidle(dev);
return result;
}
static irqreturn_t ravb_dma_interrupt(int irq, void *dev_id, int q)
{
struct net_device *ndev = dev_id;
struct ravb_private *priv = netdev_priv(ndev);
struct device *dev = &priv->pdev->dev;
irqreturn_t result = IRQ_NONE;
pm_runtime_get_noresume(dev);
if (unlikely(!pm_runtime_active(dev)))
goto out_rpm_put;
spin_lock(&priv->lock);
/* Network control/Best effort queue RX/TX */
if (ravb_queue_interrupt(ndev, q))
result = IRQ_HANDLED;
spin_unlock(&priv->lock);
out_rpm_put:
pm_runtime_put_noidle(dev);
return result;
}
static irqreturn_t ravb_be_interrupt(int irq, void *dev_id)
{
return ravb_dma_interrupt(irq, dev_id, RAVB_BE);
}
static irqreturn_t ravb_nc_interrupt(int irq, void *dev_id)
{
return ravb_dma_interrupt(irq, dev_id, RAVB_NC);
}
static int ravb_poll(struct napi_struct *napi, int budget)
{
struct net_device *ndev = napi->dev;
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
unsigned long flags;
int q = napi - priv->napi;
int mask = BIT(q);
int work_done;
/* Processing RX Descriptor Ring */
/* Clear RX interrupt */
ravb_write(ndev, ~(mask | RIS0_RESERVED), RIS0);
work_done = ravb_rx(ndev, budget, q);
/* Processing TX Descriptor Ring */
spin_lock_irqsave(&priv->lock, flags);
/* Clear TX interrupt */
ravb_write(ndev, ~(mask | TIS_RESERVED), TIS);
ravb_tx_free(ndev, q, true);
netif_wake_subqueue(ndev, q);
spin_unlock_irqrestore(&priv->lock, flags);
/* Receive error message handling */
priv->rx_over_errors = priv->stats[RAVB_BE].rx_over_errors;
if (info->nc_queues)
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;
if (work_done < budget && napi_complete_done(napi, work_done)) {
/* Re-enable RX/TX interrupts */
spin_lock_irqsave(&priv->lock, flags);
if (!info->irq_en_dis) {
ravb_modify(ndev, RIC0, mask, mask);
ravb_modify(ndev, TIC, mask, mask);
} else {
ravb_write(ndev, mask, RIE0);
ravb_write(ndev, mask, TIE);
}
spin_unlock_irqrestore(&priv->lock, flags);
}
return work_done;
}
static void ravb_set_duplex_gbeth(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
ravb_modify(ndev, ECMR, ECMR_DM, priv->duplex > 0 ? ECMR_DM : 0);
}
/* PHY state control function */
static void ravb_adjust_link(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct phy_device *phydev = ndev->phydev;
bool new_state = false;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
/* Disable TX and RX right over here, if E-MAC change is ignored */
if (priv->no_avb_link)
ravb_rcv_snd_disable(ndev);
if (phydev->link) {
if (info->half_duplex && phydev->duplex != priv->duplex) {
new_state = true;
priv->duplex = phydev->duplex;
ravb_set_duplex_gbeth(ndev);
}
if (phydev->speed != priv->speed) {
new_state = true;
priv->speed = phydev->speed;
info->set_rate(ndev);
}
if (!priv->link) {
ravb_modify(ndev, ECMR, ECMR_TXF, 0);
new_state = true;
priv->link = phydev->link;
}
} else if (priv->link) {
new_state = true;
priv->link = 0;
priv->speed = 0;
if (info->half_duplex)
priv->duplex = -1;
}
/* Enable TX and RX right over here, if E-MAC change is ignored */
if (priv->no_avb_link && phydev->link)
ravb_rcv_snd_enable(ndev);
spin_unlock_irqrestore(&priv->lock, flags);
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);
const struct ravb_hw_info *info = priv->info;
struct phy_device *phydev;
struct device_node *pn;
phy_interface_t iface;
int err;
priv->link = 0;
priv->speed = 0;
priv->duplex = -1;
/* Try connecting to PHY */
pn = of_parse_phandle(np, "phy-handle", 0);
if (!pn) {
/* In the case of a fixed PHY, the DT node associated
* to the PHY is the Ethernet MAC DT node.
*/
if (of_phy_is_fixed_link(np)) {
err = of_phy_register_fixed_link(np);
if (err)
return err;
}
pn = of_node_get(np);
}
iface = priv->rgmii_override ? PHY_INTERFACE_MODE_RGMII
: priv->phy_interface;
phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0, iface);
of_node_put(pn);
if (!phydev) {
netdev_err(ndev, "failed to connect PHY\n");
err = -ENOENT;
goto err_deregister_fixed_link;
}
if (!info->half_duplex) {
/* 10BASE, Pause and Asym Pause is not supported */
phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Pause_BIT);
phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
/* Half Duplex is not supported */
phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
}
phy_attached_info(phydev);
return 0;
err_deregister_fixed_link:
if (of_phy_is_fixed_link(np))
of_phy_deregister_fixed_link(np);
return err;
}
/* PHY control start function */
static int ravb_phy_start(struct net_device *ndev)
{
int error;
error = ravb_phy_init(ndev);
if (error)
return error;
phy_start(ndev->phydev);
return 0;
}
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_gbeth[][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_csum_offload_errors",
"rx_queue_0_over_errors",
};
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",
};
static int ravb_get_sset_count(struct net_device *netdev, int sset)
{
struct ravb_private *priv = netdev_priv(netdev);
const struct ravb_hw_info *info = priv->info;
switch (sset) {
case ETH_SS_STATS:
return info->stats_len;
default:
return -EOPNOTSUPP;
}
}
static void ravb_get_ethtool_stats(struct net_device *ndev,
struct ethtool_stats *estats, u64 *data)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
int num_rx_q;
int i = 0;
int q;
num_rx_q = info->nc_queues ? NUM_RX_QUEUE : 1;
/* Device-specific stats */
for (q = RAVB_BE; q < num_rx_q; 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)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
switch (stringset) {
case ETH_SS_STATS:
memcpy(data, info->gstrings_stats, info->gstrings_size);
break;
}
}
static void ravb_get_ringparam(struct net_device *ndev,
struct ethtool_ringparam *ring,
struct kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
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 kernel_ethtool_ringparam *kernel_ring,
struct netlink_ext_ack *extack)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
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 */
if (info->gptp)
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);
if (info->nc_queues)
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 */
if (info->gptp)
ravb_ptp_init(ndev, priv->pdev);
netif_device_attach(ndev);
}
return 0;
}
static int ravb_get_ts_info(struct net_device *ndev,
struct kernel_ethtool_ts_info *info)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *hw_info = priv->info;
info->so_timestamping =
SOF_TIMESTAMPING_TX_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);
if (hw_info->gptp || hw_info->ccc_gac)
info->phc_index = ptp_clock_index(priv->ptp.clock);
else
info->phc_index = 0;
return 0;
}
static void ravb_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
{
struct ravb_private *priv = netdev_priv(ndev);
wol->supported = WAKE_MAGIC;
wol->wolopts = priv->wol_enabled ? WAKE_MAGIC : 0;
}
static int ravb_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
if (!info->magic_pkt || (wol->wolopts & ~WAKE_MAGIC))
return -EOPNOTSUPP;
priv->wol_enabled = !!(wol->wolopts & WAKE_MAGIC);
device_set_wakeup_enable(&priv->pdev->dev, priv->wol_enabled);
return 0;
}
static const struct ethtool_ops ravb_ethtool_ops = {
.nway_reset = phy_ethtool_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,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
.get_wol = ravb_get_wol,
.set_wol = ravb_set_wol,
};
static int ravb_set_config_mode(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
int error;
if (info->gptp) {
error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
if (error)
return error;
/* Set CSEL value */
ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);
} else if (info->ccc_gac) {
error = ravb_set_opmode(ndev, CCC_OPC_CONFIG | CCC_GAC | CCC_CSEL_HPB);
} else {
error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
}
return error;
}
static void ravb_set_gti(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
if (!(info->gptp || info->ccc_gac))
return;
ravb_write(ndev, priv->gti_tiv, GTI);
/* Request GTI loading */
ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
}
static int ravb_compute_gti(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct device *dev = ndev->dev.parent;
unsigned long rate;
u64 inc;
if (!(info->gptp || info->ccc_gac))
return 0;
if (info->gptp_ref_clk)
rate = clk_get_rate(priv->gptp_clk);
else
rate = clk_get_rate(priv->clk);
if (!rate)
return -EINVAL;
inc = div64_ul(1000000000ULL << 20, rate);
if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) {
dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n",
inc, GTI_TIV_MIN, GTI_TIV_MAX);
return -EINVAL;
}
priv->gti_tiv = inc;
return 0;
}
/* Set tx and rx clock internal delay modes */
static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
bool explicit_delay = false;
u32 delay;
if (!priv->info->internal_delay)
return;
if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay)) {
/* Valid values are 0 and 1800, according to DT bindings */
priv->rxcidm = !!delay;
explicit_delay = true;
}
if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay)) {
/* Valid values are 0 and 2000, according to DT bindings */
priv->txcidm = !!delay;
explicit_delay = true;
}
if (explicit_delay)
return;
/* Fall back to legacy rgmii-*id behavior */
if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID) {
priv->rxcidm = 1;
priv->rgmii_override = 1;
}
if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
priv->txcidm = 1;
priv->rgmii_override = 1;
}
}
static void ravb_set_delay_mode(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
u32 set = 0;
if (!priv->info->internal_delay)
return;
if (priv->rxcidm)
set |= APSR_RDM;
if (priv->txcidm)
set |= APSR_TDM;
ravb_modify(ndev, APSR, APSR_RDM | APSR_TDM, set);
}
/* Network device open function for Ethernet AVB */
static int ravb_open(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct device *dev = &priv->pdev->dev;
int error;
napi_enable(&priv->napi[RAVB_BE]);
if (info->nc_queues)
napi_enable(&priv->napi[RAVB_NC]);
error = pm_runtime_resume_and_get(dev);
if (error < 0)
goto out_napi_off;
/* Set AVB config mode */
error = ravb_set_config_mode(ndev);
if (error)
goto out_rpm_put;
ravb_set_delay_mode(ndev);
ravb_write(ndev, priv->desc_bat_dma, DBAT);
/* Device init */
error = ravb_dmac_init(ndev);
if (error)
goto out_set_reset;
ravb_emac_init(ndev);
ravb_set_gti(ndev);
/* Initialise PTP Clock driver */
if (info->gptp || info->ccc_gac)
ravb_ptp_init(ndev, priv->pdev);
/* PHY control start */
error = ravb_phy_start(ndev);
if (error)
goto out_ptp_stop;
netif_tx_start_all_queues(ndev);
return 0;
out_ptp_stop:
/* Stop PTP Clock driver */
if (info->gptp || info->ccc_gac)
ravb_ptp_stop(ndev);
ravb_stop_dma(ndev);
out_set_reset:
ravb_set_opmode(ndev, CCC_OPC_RESET);
out_rpm_put:
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
out_napi_off:
if (info->nc_queues)
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, unsigned int txqueue)
{
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);
const struct ravb_hw_info *info = priv->info;
struct net_device *ndev = priv->ndev;
int error;
if (!rtnl_trylock()) {
usleep_range(1000, 2000);
schedule_work(&priv->work);
return;
}
netif_tx_stop_all_queues(ndev);
/* Stop PTP Clock driver */
if (info->gptp)
ravb_ptp_stop(ndev);
/* Wait for DMA stopping */
if (ravb_stop_dma(ndev)) {
/* If ravb_stop_dma() fails, the hardware is still operating
* for TX and/or RX. So, this should not call the following
* functions because ravb_dmac_init() is possible to fail too.
* Also, this should not retry ravb_stop_dma() again and again
* here because it's possible to wait forever. So, this just
* re-enables the TX and RX and skip the following
* re-initialization procedure.
*/
ravb_rcv_snd_enable(ndev);
goto out;
}
ravb_ring_free(ndev, RAVB_BE);
if (info->nc_queues)
ravb_ring_free(ndev, RAVB_NC);
/* Device init */
error = ravb_dmac_init(ndev);
if (error) {
/* If ravb_dmac_init() fails, descriptors are freed. So, this
* should return here to avoid re-enabling the TX and RX in
* ravb_emac_init().
*/
netdev_err(ndev, "%s: ravb_dmac_init() failed, error %d\n",
__func__, error);
goto out_unlock;
}
ravb_emac_init(ndev);
out:
/* Initialise PTP Clock driver */
if (info->gptp)
ravb_ptp_init(ndev, priv->pdev);
netif_tx_start_all_queues(ndev);
out_unlock:
rtnl_unlock();
}
static bool ravb_can_tx_csum_gbeth(struct sk_buff *skb)
{
struct iphdr *ip = ip_hdr(skb);
/* TODO: Need to add support for VLAN tag 802.1Q */
if (skb_vlan_tag_present(skb))
return false;
/* TODO: Need to add hardware checksum for IPv6 */
if (skb->protocol != htons(ETH_P_IP))
return false;
switch (ip->protocol) {
case IPPROTO_TCP:
break;
case IPPROTO_UDP:
/* If the checksum value in the UDP header field is 0, TOE does
* not calculate checksum for UDP part of this frame as it is
* optional function as per standards.
*/
if (udp_hdr(skb)->check == 0)
return false;
break;
default:
return false;
}
return true;
}
/* 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);
const struct ravb_hw_info *info = priv->info;
unsigned int num_tx_desc = priv->num_tx_desc;
u16 q = skb_get_queue_mapping(skb);
struct ravb_tstamp_skb *ts_skb;
struct ravb_tx_desc *desc;
unsigned long flags;
dma_addr_t dma_addr;
void *buffer;
u32 entry;
u32 len;
if (skb->ip_summed == CHECKSUM_PARTIAL && !ravb_can_tx_csum_gbeth(skb))
skb_checksum_help(skb);
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;
}
if (skb_put_padto(skb, ETH_ZLEN))
goto exit;
entry = priv->cur_tx[q] % (priv->num_tx_ring[q] * num_tx_desc);
priv->tx_skb[q][entry / num_tx_desc] = skb;
if (num_tx_desc > 1) {
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++;
} else {
desc = &priv->tx_ring[q][entry];
len = skb->len;
dma_addr = dma_map_single(ndev->dev.parent, skb->data, skb->len,
DMA_TO_DEVICE);
if (dma_mapping_error(ndev->dev.parent, dma_addr))
goto drop;
}
desc->ds_tagl = cpu_to_le16(len);
desc->dptr = cpu_to_le32(dma_addr);
/* TX timestamp required */
if (info->gptp || info->ccc_gac) {
if (q == RAVB_NC) {
ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC);
if (!ts_skb) {
if (num_tx_desc > 1) {
desc--;
dma_unmap_single(ndev->dev.parent, dma_addr,
len, DMA_TO_DEVICE);
}
goto unmap;
}
ts_skb->skb = skb_get(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;
desc->tagh_tsr = (ts_skb->tag >> 4) | TX_TSR;
desc->ds_tagl |= cpu_to_le16(ts_skb->tag << 12);
}
skb_tx_timestamp(skb);
}
/* Descriptor type must be set after all the above writes */
dma_wmb();
if (num_tx_desc > 1) {
desc->die_dt = DT_FEND;
desc--;
desc->die_dt = DT_FSTART;
} else {
desc->die_dt = DT_FSINGLE;
}
ravb_modify(ndev, TCCR, TCCR_TSRQ0 << q, TCCR_TSRQ0 << q);
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:
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,
struct net_device *sb_dev)
{
/* 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);
const struct ravb_hw_info *info = priv->info;
struct net_device_stats *nstats, *stats0, *stats1;
struct device *dev = &priv->pdev->dev;
nstats = &ndev->stats;
pm_runtime_get_noresume(dev);
if (!pm_runtime_active(dev))
goto out_rpm_put;
stats0 = &priv->stats[RAVB_BE];
if (info->tx_counters) {
nstats->tx_dropped += ravb_read(ndev, TROCR);
ravb_write(ndev, 0, TROCR); /* (write clear) */
}
if (info->carrier_counters) {
nstats->collisions += ravb_read(ndev, CXR41);
ravb_write(ndev, 0, CXR41); /* (write clear) */
nstats->tx_carrier_errors += ravb_read(ndev, CXR42);
ravb_write(ndev, 0, CXR42); /* (write clear) */
}
nstats->rx_packets = stats0->rx_packets;
nstats->tx_packets = stats0->tx_packets;
nstats->rx_bytes = stats0->rx_bytes;
nstats->tx_bytes = stats0->tx_bytes;
nstats->multicast = stats0->multicast;
nstats->rx_errors = stats0->rx_errors;
nstats->rx_crc_errors = stats0->rx_crc_errors;
nstats->rx_frame_errors = stats0->rx_frame_errors;
nstats->rx_length_errors = stats0->rx_length_errors;
nstats->rx_missed_errors = stats0->rx_missed_errors;
nstats->rx_over_errors = stats0->rx_over_errors;
if (info->nc_queues) {
stats1 = &priv->stats[RAVB_NC];
nstats->rx_packets += stats1->rx_packets;
nstats->tx_packets += stats1->tx_packets;
nstats->rx_bytes += stats1->rx_bytes;
nstats->tx_bytes += stats1->tx_bytes;
nstats->multicast += stats1->multicast;
nstats->rx_errors += stats1->rx_errors;
nstats->rx_crc_errors += stats1->rx_crc_errors;
nstats->rx_frame_errors += stats1->rx_frame_errors;
nstats->rx_length_errors += stats1->rx_length_errors;
nstats->rx_missed_errors += stats1->rx_missed_errors;
nstats->rx_over_errors += stats1->rx_over_errors;
}
out_rpm_put:
pm_runtime_put_noidle(dev);
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;
spin_lock_irqsave(&priv->lock, flags);
ravb_modify(ndev, ECMR, ECMR_PRM,
ndev->flags & IFF_PROMISC ? ECMR_PRM : 0);
spin_unlock_irqrestore(&priv->lock, flags);
}
/* Device close function for Ethernet AVB */
static int ravb_close(struct net_device *ndev)
{
struct device_node *np = ndev->dev.parent->of_node;
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct ravb_tstamp_skb *ts_skb, *ts_skb2;
struct device *dev = &priv->pdev->dev;
int error;
netif_tx_stop_all_queues(ndev);
/* Disable interrupts by clearing the interrupt masks. */
ravb_write(ndev, 0, RIC0);
ravb_write(ndev, 0, RIC2);
ravb_write(ndev, 0, TIC);
/* PHY disconnect */
if (ndev->phydev) {
phy_stop(ndev->phydev);
phy_disconnect(ndev->phydev);
if (of_phy_is_fixed_link(np))
of_phy_deregister_fixed_link(np);
}
/* Stop PTP Clock driver */
if (info->gptp || info->ccc_gac)
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 */
if (info->gptp || info->ccc_gac) {
list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, list) {
list_del(&ts_skb->list);
kfree_skb(ts_skb->skb);
kfree(ts_skb);
}
}
cancel_work_sync(&priv->work);
if (info->nc_queues)
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);
if (info->nc_queues)
ravb_ring_free(ndev, RAVB_NC);
/* Update statistics. */
ravb_get_stats(ndev);
/* Set reset mode. */
error = ravb_set_opmode(ndev, CCC_OPC_RESET);
if (error)
return error;
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
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;
switch (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE) {
case RAVB_RXTSTAMP_TYPE_V2_L2_EVENT:
config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
break;
case RAVB_RXTSTAMP_TYPE_ALL:
config.rx_filter = HWTSTAMP_FILTER_ALL;
break;
default:
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;
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 phy_device *phydev = ndev->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 int ravb_change_mtu(struct net_device *ndev, int new_mtu)
{
struct ravb_private *priv = netdev_priv(ndev);
WRITE_ONCE(ndev->mtu, new_mtu);
if (netif_running(ndev)) {
synchronize_irq(priv->emac_irq);
ravb_emac_init(ndev);
}
netdev_update_features(ndev);
return 0;
}
static void ravb_set_rx_csum(struct net_device *ndev, bool enable)
{
struct ravb_private *priv = netdev_priv(ndev);
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
/* Disable TX and RX */
ravb_rcv_snd_disable(ndev);
/* Modify RX Checksum setting */
ravb_modify(ndev, ECMR, ECMR_RCSC, enable ? ECMR_RCSC : 0);
/* Enable TX and RX */
ravb_rcv_snd_enable(ndev);
spin_unlock_irqrestore(&priv->lock, flags);
}
static int ravb_endisable_csum_gbeth(struct net_device *ndev, enum ravb_reg reg,
u32 val, u32 mask)
{
u32 csr0 = CSR0_TPE | CSR0_RPE;
int ret;
ravb_write(ndev, csr0 & ~mask, CSR0);
ret = ravb_wait(ndev, CSR0, mask, 0);
if (!ret)
ravb_write(ndev, val, reg);
ravb_write(ndev, csr0, CSR0);
return ret;
}
static int ravb_set_features_gbeth(struct net_device *ndev,
netdev_features_t features)
{
netdev_features_t changed = ndev->features ^ features;
struct ravb_private *priv = netdev_priv(ndev);
unsigned long flags;
int ret = 0;
u32 val;
spin_lock_irqsave(&priv->lock, flags);
if (changed & NETIF_F_RXCSUM) {
if (features & NETIF_F_RXCSUM)
val = CSR2_RIP4 | CSR2_RTCP4 | CSR2_RUDP4 | CSR2_RICMP4;
else
val = 0;
ret = ravb_endisable_csum_gbeth(ndev, CSR2, val, CSR0_RPE);
if (ret)
goto done;
}
if (changed & NETIF_F_HW_CSUM) {
if (features & NETIF_F_HW_CSUM)
val = CSR1_TIP4 | CSR1_TTCP4 | CSR1_TUDP4;
else
val = 0;
ret = ravb_endisable_csum_gbeth(ndev, CSR1, val, CSR0_TPE);
if (ret)
goto done;
}
done:
spin_unlock_irqrestore(&priv->lock, flags);
return ret;
}
static int ravb_set_features_rcar(struct net_device *ndev,
netdev_features_t features)
{
netdev_features_t changed = ndev->features ^ features;
if (changed & NETIF_F_RXCSUM)
ravb_set_rx_csum(ndev, features & NETIF_F_RXCSUM);
return 0;
}
static int ravb_set_features(struct net_device *ndev,
netdev_features_t features)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct device *dev = &priv->pdev->dev;
int ret;
pm_runtime_get_noresume(dev);
if (pm_runtime_active(dev))
ret = info->set_feature(ndev, features);
else
ret = 0;
pm_runtime_put_noidle(dev);
if (ret)
return ret;
ndev->features = features;
return 0;
}
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_eth_ioctl = ravb_do_ioctl,
.ndo_change_mtu = ravb_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
.ndo_set_features = ravb_set_features,
};
/* MDIO bus init function */
static int ravb_mdio_init(struct ravb_private *priv)
{
struct platform_device *pdev = priv->pdev;
struct device *dev = &pdev->dev;
struct device_node *mdio_node;
struct phy_device *phydev;
struct device_node *pn;
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 */
mdio_node = of_get_child_by_name(dev->of_node, "mdio");
if (!mdio_node) {
/* backwards compatibility for DT lacking mdio subnode */
mdio_node = of_node_get(dev->of_node);
}
error = of_mdiobus_register(priv->mii_bus, mdio_node);
of_node_put(mdio_node);
if (error)
goto out_free_bus;
pn = of_parse_phandle(dev->of_node, "phy-handle", 0);
phydev = of_phy_find_device(pn);
if (phydev) {
phydev->mac_managed_pm = true;
put_device(&phydev->mdio.dev);
}
of_node_put(pn);
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 ravb_hw_info ravb_gen2_hw_info = {
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
.set_feature = ravb_set_features_rcar,
.dmac_init = ravb_dmac_init_rcar,
.emac_init = ravb_emac_init_rcar,
.gstrings_stats = ravb_gstrings_stats,
.gstrings_size = sizeof(ravb_gstrings_stats),
.net_hw_features = NETIF_F_RXCSUM,
.net_features = NETIF_F_RXCSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.tx_max_frame_size = SZ_2K,
.rx_max_frame_size = SZ_2K,
.rx_buffer_size = SZ_2K +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
.rx_desc_size = sizeof(struct ravb_ex_rx_desc),
.aligned_tx = 1,
.gptp = 1,
.nc_queues = 1,
.magic_pkt = 1,
};
static const struct ravb_hw_info ravb_gen3_hw_info = {
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
.set_feature = ravb_set_features_rcar,
.dmac_init = ravb_dmac_init_rcar,
.emac_init = ravb_emac_init_rcar,
.gstrings_stats = ravb_gstrings_stats,
.gstrings_size = sizeof(ravb_gstrings_stats),
.net_hw_features = NETIF_F_RXCSUM,
.net_features = NETIF_F_RXCSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.tx_max_frame_size = SZ_2K,
.rx_max_frame_size = SZ_2K,
.rx_buffer_size = SZ_2K +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
.rx_desc_size = sizeof(struct ravb_ex_rx_desc),
.internal_delay = 1,
.tx_counters = 1,
.multi_irqs = 1,
.irq_en_dis = 1,
.ccc_gac = 1,
.nc_queues = 1,
.magic_pkt = 1,
};
static const struct ravb_hw_info ravb_gen4_hw_info = {
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
.set_feature = ravb_set_features_rcar,
.dmac_init = ravb_dmac_init_rcar,
.emac_init = ravb_emac_init_rcar_gen4,
.gstrings_stats = ravb_gstrings_stats,
.gstrings_size = sizeof(ravb_gstrings_stats),
.net_hw_features = NETIF_F_RXCSUM,
.net_features = NETIF_F_RXCSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.tx_max_frame_size = SZ_2K,
.rx_max_frame_size = SZ_2K,
.rx_buffer_size = SZ_2K +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
.rx_desc_size = sizeof(struct ravb_ex_rx_desc),
.internal_delay = 1,
.tx_counters = 1,
.multi_irqs = 1,
.irq_en_dis = 1,
.ccc_gac = 1,
.nc_queues = 1,
.magic_pkt = 1,
};
static const struct ravb_hw_info ravb_rzv2m_hw_info = {
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
.set_feature = ravb_set_features_rcar,
.dmac_init = ravb_dmac_init_rcar,
.emac_init = ravb_emac_init_rcar,
.gstrings_stats = ravb_gstrings_stats,
.gstrings_size = sizeof(ravb_gstrings_stats),
.net_hw_features = NETIF_F_RXCSUM,
.net_features = NETIF_F_RXCSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
.rx_buffer_size = SZ_2K +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
.rx_desc_size = sizeof(struct ravb_ex_rx_desc),
.multi_irqs = 1,
.err_mgmt_irqs = 1,
.gptp = 1,
.gptp_ref_clk = 1,
.nc_queues = 1,
.magic_pkt = 1,
};
static const struct ravb_hw_info gbeth_hw_info = {
.receive = ravb_rx_gbeth,
.set_rate = ravb_set_rate_gbeth,
.set_feature = ravb_set_features_gbeth,
.dmac_init = ravb_dmac_init_gbeth,
.emac_init = ravb_emac_init_gbeth,
.gstrings_stats = ravb_gstrings_stats_gbeth,
.gstrings_size = sizeof(ravb_gstrings_stats_gbeth),
.net_hw_features = NETIF_F_RXCSUM | NETIF_F_HW_CSUM,
.net_features = NETIF_F_RXCSUM | NETIF_F_HW_CSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats_gbeth),
.tccr_mask = TCCR_TSRQ0,
.tx_max_frame_size = 1522,
.rx_max_frame_size = SZ_8K,
.rx_buffer_size = SZ_2K,
.rx_desc_size = sizeof(struct ravb_rx_desc),
.aligned_tx = 1,
.coalesce_irqs = 1,
.tx_counters = 1,
.carrier_counters = 1,
.half_duplex = 1,
};
static const struct of_device_id ravb_match_table[] = {
{ .compatible = "renesas,etheravb-r8a7790", .data = &ravb_gen2_hw_info },
{ .compatible = "renesas,etheravb-r8a7794", .data = &ravb_gen2_hw_info },
{ .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
{ .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
{ .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
{ .compatible = "renesas,etheravb-rcar-gen4", .data = &ravb_gen4_hw_info },
{ .compatible = "renesas,etheravb-rzv2m", .data = &ravb_rzv2m_hw_info },
{ .compatible = "renesas,rzg2l-gbeth", .data = &gbeth_hw_info },
{ }
};
MODULE_DEVICE_TABLE(of, ravb_match_table);
static int ravb_setup_irq(struct ravb_private *priv, const char *irq_name,
const char *ch, int *irq, irq_handler_t handler)
{
struct platform_device *pdev = priv->pdev;
struct net_device *ndev = priv->ndev;
struct device *dev = &pdev->dev;
const char *devname = dev_name(dev);
unsigned long flags;
int error, irq_num;
if (irq_name) {
devname = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", devname, ch);
if (!devname)
return -ENOMEM;
irq_num = platform_get_irq_byname(pdev, irq_name);
flags = 0;
} else {
irq_num = platform_get_irq(pdev, 0);
flags = IRQF_SHARED;
}
if (irq_num < 0)
return irq_num;
if (irq)
*irq = irq_num;
error = devm_request_irq(dev, irq_num, handler, flags, devname, ndev);
if (error)
netdev_err(ndev, "cannot request IRQ %s\n", devname);
return error;
}
static int ravb_setup_irqs(struct ravb_private *priv)
{
const struct ravb_hw_info *info = priv->info;
struct net_device *ndev = priv->ndev;
const char *irq_name, *emac_irq_name;
int error;
if (!info->multi_irqs)
return ravb_setup_irq(priv, NULL, NULL, &ndev->irq, ravb_interrupt);
if (info->err_mgmt_irqs) {
irq_name = "dia";
emac_irq_name = "line3";
} else {
irq_name = "ch22";
emac_irq_name = "ch24";
}
error = ravb_setup_irq(priv, irq_name, "ch22:multi", &ndev->irq, ravb_multi_interrupt);
if (error)
return error;
error = ravb_setup_irq(priv, emac_irq_name, "ch24:emac", &priv->emac_irq,
ravb_emac_interrupt);
if (error)
return error;
if (info->err_mgmt_irqs) {
error = ravb_setup_irq(priv, "err_a", "err_a", NULL, ravb_multi_interrupt);
if (error)
return error;
error = ravb_setup_irq(priv, "mgmt_a", "mgmt_a", NULL, ravb_multi_interrupt);
if (error)
return error;
}
error = ravb_setup_irq(priv, "ch0", "ch0:rx_be", NULL, ravb_be_interrupt);
if (error)
return error;
error = ravb_setup_irq(priv, "ch1", "ch1:rx_nc", NULL, ravb_nc_interrupt);
if (error)
return error;
error = ravb_setup_irq(priv, "ch18", "ch18:tx_be", NULL, ravb_be_interrupt);
if (error)
return error;
return ravb_setup_irq(priv, "ch19", "ch19:tx_nc", NULL, ravb_nc_interrupt);
}
static int ravb_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
const struct ravb_hw_info *info;
struct reset_control *rstc;
struct ravb_private *priv;
struct net_device *ndev;
struct resource *res;
int error, q;
if (!np) {
dev_err(&pdev->dev,
"this driver is required to be instantiated from device tree\n");
return -EINVAL;
}
rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
if (IS_ERR(rstc))
return dev_err_probe(&pdev->dev, PTR_ERR(rstc),
"failed to get cpg reset\n");
ndev = alloc_etherdev_mqs(sizeof(struct ravb_private),
NUM_TX_QUEUE, NUM_RX_QUEUE);
if (!ndev)
return -ENOMEM;
info = of_device_get_match_data(&pdev->dev);
ndev->features = info->net_features;
ndev->hw_features = info->net_hw_features;
error = reset_control_deassert(rstc);
if (error)
goto out_free_netdev;
SET_NETDEV_DEV(ndev, &pdev->dev);
priv = netdev_priv(ndev);
priv->info = info;
priv->rstc = rstc;
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;
if (info->nc_queues) {
priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE;
priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE;
}
error = ravb_setup_irqs(priv);
if (error)
goto out_reset_assert;
priv->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->clk)) {
error = PTR_ERR(priv->clk);
goto out_reset_assert;
}
if (info->gptp_ref_clk) {
priv->gptp_clk = devm_clk_get(&pdev->dev, "gptp");
if (IS_ERR(priv->gptp_clk)) {
error = PTR_ERR(priv->gptp_clk);
goto out_reset_assert;
}
}
priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");
if (IS_ERR(priv->refclk)) {
error = PTR_ERR(priv->refclk);
goto out_reset_assert;
}
clk_prepare(priv->refclk);
platform_set_drvdata(pdev, ndev);
pm_runtime_set_autosuspend_delay(&pdev->dev, 100);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_enable(&pdev->dev);
error = pm_runtime_resume_and_get(&pdev->dev);
if (error < 0)
goto out_rpm_disable;
priv->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(priv->addr)) {
error = PTR_ERR(priv->addr);
goto out_rpm_put;
}
/* The Ether-specific entries in the device structure. */
ndev->base_addr = res->start;
spin_lock_init(&priv->lock);
INIT_WORK(&priv->work, ravb_tx_timeout_work);
error = of_get_phy_mode(np, &priv->phy_interface);
if (error && error != -ENODEV)
goto out_rpm_put;
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");
ndev->max_mtu = info->tx_max_frame_size -
(ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
ndev->min_mtu = ETH_MIN_MTU;
/* FIXME: R-Car Gen2 has 4byte alignment restriction for tx buffer
* Use two descriptor to handle such situation. First descriptor to
* handle aligned data buffer and second descriptor to handle the
* overflow data because of alignment.
*/
priv->num_tx_desc = info->aligned_tx ? 2 : 1;
/* Set function */
ndev->netdev_ops = &ravb_netdev_ops;
ndev->ethtool_ops = &ravb_ethtool_ops;
error = ravb_compute_gti(ndev);
if (error)
goto out_rpm_put;
ravb_parse_delay_mode(np, ndev);
/* 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_rpm_put;
}
for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
priv->desc_bat[q].die_dt = DT_EOS;
/* Initialise HW timestamp list */
INIT_LIST_HEAD(&priv->ts_skb_list);
/* Debug message level */
priv->msg_enable = RAVB_DEF_MSG_ENABLE;
/* Set config mode as this is needed for PHY initialization. */
error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
if (error)
goto out_rpm_put;
/* Read and set MAC address */
ravb_read_mac_address(np, ndev);
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_reset_mode;
}
/* Undo previous switch to config opmode. */
error = ravb_set_opmode(ndev, CCC_OPC_RESET);
if (error)
goto out_mdio_release;
netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll);
if (info->nc_queues)
netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll);
if (info->coalesce_irqs) {
netdev_sw_irq_coalesce_default_on(ndev);
if (num_present_cpus() == 1)
dev_set_threaded(ndev, true);
}
/* Network device register */
error = register_netdev(ndev);
if (error)
goto out_napi_del;
device_set_wakeup_capable(&pdev->dev, 1);
/* Print device information */
netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n",
(u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);
return 0;
out_napi_del:
if (info->nc_queues)
netif_napi_del(&priv->napi[RAVB_NC]);
netif_napi_del(&priv->napi[RAVB_BE]);
out_mdio_release:
ravb_mdio_release(priv);
out_reset_mode:
ravb_set_opmode(ndev, CCC_OPC_RESET);
dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
priv->desc_bat_dma);
out_rpm_put:
pm_runtime_put(&pdev->dev);
out_rpm_disable:
pm_runtime_disable(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
clk_unprepare(priv->refclk);
out_reset_assert:
reset_control_assert(rstc);
out_free_netdev:
free_netdev(ndev);
return error;
}
static void ravb_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
struct device *dev = &priv->pdev->dev;
int error;
error = pm_runtime_resume_and_get(dev);
if (error < 0)
return;
unregister_netdev(ndev);
if (info->nc_queues)
netif_napi_del(&priv->napi[RAVB_NC]);
netif_napi_del(&priv->napi[RAVB_BE]);
ravb_mdio_release(priv);
dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
priv->desc_bat_dma);
pm_runtime_put_sync_suspend(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_dont_use_autosuspend(dev);
clk_unprepare(priv->refclk);
reset_control_assert(priv->rstc);
free_netdev(ndev);
platform_set_drvdata(pdev, NULL);
}
static int ravb_wol_setup(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
/* Disable interrupts by clearing the interrupt masks. */
ravb_write(ndev, 0, RIC0);
ravb_write(ndev, 0, RIC2);
ravb_write(ndev, 0, TIC);
/* Only allow ECI interrupts */
synchronize_irq(priv->emac_irq);
if (info->nc_queues)
napi_disable(&priv->napi[RAVB_NC]);
napi_disable(&priv->napi[RAVB_BE]);
ravb_write(ndev, ECSIPR_MPDIP, ECSIPR);
/* Enable MagicPacket */
ravb_modify(ndev, ECMR, ECMR_MPDE, ECMR_MPDE);
if (priv->info->ccc_gac)
ravb_ptp_stop(ndev);
return enable_irq_wake(priv->emac_irq);
}
static int ravb_wol_restore(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
int error;
/* Set reset mode to rearm the WoL logic. */
error = ravb_set_opmode(ndev, CCC_OPC_RESET);
if (error)
return error;
/* Set AVB config mode. */
error = ravb_set_config_mode(ndev);
if (error)
return error;
if (priv->info->ccc_gac)
ravb_ptp_init(ndev, priv->pdev);
if (info->nc_queues)
napi_enable(&priv->napi[RAVB_NC]);
napi_enable(&priv->napi[RAVB_BE]);
/* Disable MagicPacket */
ravb_modify(ndev, ECMR, ECMR_MPDE, 0);
ravb_close(ndev);
return disable_irq_wake(priv->emac_irq);
}
static int ravb_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ravb_private *priv = netdev_priv(ndev);
int ret;
if (!netif_running(ndev))
goto reset_assert;
netif_device_detach(ndev);
if (priv->wol_enabled)
return ravb_wol_setup(ndev);
ret = ravb_close(ndev);
if (ret)
return ret;
ret = pm_runtime_force_suspend(&priv->pdev->dev);
if (ret)
return ret;
reset_assert:
return reset_control_assert(priv->rstc);
}
static int ravb_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ravb_private *priv = netdev_priv(ndev);
int ret;
ret = reset_control_deassert(priv->rstc);
if (ret)
return ret;
if (!netif_running(ndev))
return 0;
/* If WoL is enabled restore the interface. */
if (priv->wol_enabled) {
ret = ravb_wol_restore(ndev);
if (ret)
return ret;
} else {
ret = pm_runtime_force_resume(dev);
if (ret)
return ret;
}
/* Reopening the interface will restore the device to the working state. */
ret = ravb_open(ndev);
if (ret < 0)
goto out_rpm_put;
ravb_set_rx_mode(ndev);
netif_device_attach(ndev);
return 0;
out_rpm_put:
if (!priv->wol_enabled) {
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
}
return ret;
}
static int ravb_runtime_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ravb_private *priv = netdev_priv(ndev);
clk_disable(priv->refclk);
return 0;
}
static int ravb_runtime_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ravb_private *priv = netdev_priv(ndev);
return clk_enable(priv->refclk);
}
static const struct dev_pm_ops ravb_dev_pm_ops = {
SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
RUNTIME_PM_OPS(ravb_runtime_suspend, ravb_runtime_resume, NULL)
};
static struct platform_driver ravb_driver = {
.probe = ravb_probe,
.remove_new = ravb_remove,
.driver = {
.name = "ravb",
.pm = pm_ptr(&ravb_dev_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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