blob: 41c81f6ec630a289c2c280ae068f429a8da9e21e [file] [log] [blame]
/*
* Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
* Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
*
* Right now, I am very wasteful with the buffers. I allocate memory
* pages and then divide them into 2K frame buffers. This way I know I
* have buffers large enough to hold one frame within one buffer descriptor.
* Once I get this working, I will use 64 or 128 byte CPM buffers, which
* will be much more memory efficient and will easily handle lots of
* small packets.
*
* Much better multiple PHY support by Magnus Damm.
* Copyright (c) 2000 Ericsson Radio Systems AB.
*
* Support for FEC controller of ColdFire processors.
* Copyright (c) 2001-2005 Greg Ungerer (gerg@snapgear.com)
*
* Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be)
* Copyright (c) 2004-2006 Macq Electronique SA.
*
* Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/pm_runtime.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <net/ip.h>
#include <net/tso.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/icmp.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/mdio.h>
#include <linux/phy.h>
#include <linux/fec.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/regulator/consumer.h>
#include <linux/if_vlan.h>
#include <linux/pinctrl/consumer.h>
#include <linux/prefetch.h>
#include <asm/cacheflush.h>
#include "fec.h"
static void set_multicast_list(struct net_device *ndev);
static void fec_enet_itr_coal_init(struct net_device *ndev);
#define DRIVER_NAME "fec"
#define FEC_ENET_GET_QUQUE(_x) ((_x == 0) ? 1 : ((_x == 1) ? 2 : 0))
/* Pause frame feild and FIFO threshold */
#define FEC_ENET_FCE (1 << 5)
#define FEC_ENET_RSEM_V 0x84
#define FEC_ENET_RSFL_V 16
#define FEC_ENET_RAEM_V 0x8
#define FEC_ENET_RAFL_V 0x8
#define FEC_ENET_OPD_V 0xFFF0
#define FEC_MDIO_PM_TIMEOUT 100 /* ms */
static struct platform_device_id fec_devtype[] = {
{
/* keep it for coldfire */
.name = DRIVER_NAME,
.driver_data = 0,
}, {
.name = "imx25-fec",
.driver_data = FEC_QUIRK_USE_GASKET | FEC_QUIRK_HAS_RACC,
}, {
.name = "imx27-fec",
.driver_data = FEC_QUIRK_HAS_RACC,
}, {
.name = "imx28-fec",
.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME |
FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC,
}, {
.name = "imx6q-fec",
.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358 |
FEC_QUIRK_HAS_RACC,
}, {
.name = "mvf600-fec",
.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_RACC,
}, {
.name = "imx6sx-fec",
.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
FEC_QUIRK_HAS_RACC,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(platform, fec_devtype);
enum imx_fec_type {
IMX25_FEC = 1, /* runs on i.mx25/50/53 */
IMX27_FEC, /* runs on i.mx27/35/51 */
IMX28_FEC,
IMX6Q_FEC,
MVF600_FEC,
IMX6SX_FEC,
};
static const struct of_device_id fec_dt_ids[] = {
{ .compatible = "fsl,imx25-fec", .data = &fec_devtype[IMX25_FEC], },
{ .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], },
{ .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], },
{ .compatible = "fsl,imx6q-fec", .data = &fec_devtype[IMX6Q_FEC], },
{ .compatible = "fsl,mvf600-fec", .data = &fec_devtype[MVF600_FEC], },
{ .compatible = "fsl,imx6sx-fec", .data = &fec_devtype[IMX6SX_FEC], },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, fec_dt_ids);
static unsigned char macaddr[ETH_ALEN];
module_param_array(macaddr, byte, NULL, 0);
MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
#if defined(CONFIG_M5272)
/*
* Some hardware gets it MAC address out of local flash memory.
* if this is non-zero then assume it is the address to get MAC from.
*/
#if defined(CONFIG_NETtel)
#define FEC_FLASHMAC 0xf0006006
#elif defined(CONFIG_GILBARCONAP) || defined(CONFIG_SCALES)
#define FEC_FLASHMAC 0xf0006000
#elif defined(CONFIG_CANCam)
#define FEC_FLASHMAC 0xf0020000
#elif defined (CONFIG_M5272C3)
#define FEC_FLASHMAC (0xffe04000 + 4)
#elif defined(CONFIG_MOD5272)
#define FEC_FLASHMAC 0xffc0406b
#else
#define FEC_FLASHMAC 0
#endif
#endif /* CONFIG_M5272 */
/* The FEC stores dest/src/type/vlan, data, and checksum for receive packets.
*/
#define PKT_MAXBUF_SIZE 1522
#define PKT_MINBUF_SIZE 64
#define PKT_MAXBLR_SIZE 1536
/* FEC receive acceleration */
#define FEC_RACC_IPDIS (1 << 1)
#define FEC_RACC_PRODIS (1 << 2)
#define FEC_RACC_OPTIONS (FEC_RACC_IPDIS | FEC_RACC_PRODIS)
/*
* The 5270/5271/5280/5282/532x RX control register also contains maximum frame
* size bits. Other FEC hardware does not, so we need to take that into
* account when setting it.
*/
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM)
#define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16)
#else
#define OPT_FRAME_SIZE 0
#endif
/* FEC MII MMFR bits definition */
#define FEC_MMFR_ST (1 << 30)
#define FEC_MMFR_OP_READ (2 << 28)
#define FEC_MMFR_OP_WRITE (1 << 28)
#define FEC_MMFR_PA(v) ((v & 0x1f) << 23)
#define FEC_MMFR_RA(v) ((v & 0x1f) << 18)
#define FEC_MMFR_TA (2 << 16)
#define FEC_MMFR_DATA(v) (v & 0xffff)
/* FEC ECR bits definition */
#define FEC_ECR_MAGICEN (1 << 2)
#define FEC_ECR_SLEEP (1 << 3)
#define FEC_MII_TIMEOUT 30000 /* us */
/* Transmitter timeout */
#define TX_TIMEOUT (2 * HZ)
#define FEC_PAUSE_FLAG_AUTONEG 0x1
#define FEC_PAUSE_FLAG_ENABLE 0x2
#define FEC_WOL_HAS_MAGIC_PACKET (0x1 << 0)
#define FEC_WOL_FLAG_ENABLE (0x1 << 1)
#define FEC_WOL_FLAG_SLEEP_ON (0x1 << 2)
#define COPYBREAK_DEFAULT 256
#define TSO_HEADER_SIZE 128
/* Max number of allowed TCP segments for software TSO */
#define FEC_MAX_TSO_SEGS 100
#define FEC_MAX_SKB_DESCS (FEC_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS)
#define IS_TSO_HEADER(txq, addr) \
((addr >= txq->tso_hdrs_dma) && \
(addr < txq->tso_hdrs_dma + txq->tx_ring_size * TSO_HEADER_SIZE))
static int mii_cnt;
static inline
struct bufdesc *fec_enet_get_nextdesc(struct bufdesc *bdp,
struct fec_enet_private *fep,
int queue_id)
{
struct bufdesc *new_bd = bdp + 1;
struct bufdesc_ex *ex_new_bd = (struct bufdesc_ex *)bdp + 1;
struct fec_enet_priv_tx_q *txq = fep->tx_queue[queue_id];
struct fec_enet_priv_rx_q *rxq = fep->rx_queue[queue_id];
struct bufdesc_ex *ex_base;
struct bufdesc *base;
int ring_size;
if (bdp >= txq->tx_bd_base) {
base = txq->tx_bd_base;
ring_size = txq->tx_ring_size;
ex_base = (struct bufdesc_ex *)txq->tx_bd_base;
} else {
base = rxq->rx_bd_base;
ring_size = rxq->rx_ring_size;
ex_base = (struct bufdesc_ex *)rxq->rx_bd_base;
}
if (fep->bufdesc_ex)
return (struct bufdesc *)((ex_new_bd >= (ex_base + ring_size)) ?
ex_base : ex_new_bd);
else
return (new_bd >= (base + ring_size)) ?
base : new_bd;
}
static inline
struct bufdesc *fec_enet_get_prevdesc(struct bufdesc *bdp,
struct fec_enet_private *fep,
int queue_id)
{
struct bufdesc *new_bd = bdp - 1;
struct bufdesc_ex *ex_new_bd = (struct bufdesc_ex *)bdp - 1;
struct fec_enet_priv_tx_q *txq = fep->tx_queue[queue_id];
struct fec_enet_priv_rx_q *rxq = fep->rx_queue[queue_id];
struct bufdesc_ex *ex_base;
struct bufdesc *base;
int ring_size;
if (bdp >= txq->tx_bd_base) {
base = txq->tx_bd_base;
ring_size = txq->tx_ring_size;
ex_base = (struct bufdesc_ex *)txq->tx_bd_base;
} else {
base = rxq->rx_bd_base;
ring_size = rxq->rx_ring_size;
ex_base = (struct bufdesc_ex *)rxq->rx_bd_base;
}
if (fep->bufdesc_ex)
return (struct bufdesc *)((ex_new_bd < ex_base) ?
(ex_new_bd + ring_size) : ex_new_bd);
else
return (new_bd < base) ? (new_bd + ring_size) : new_bd;
}
static int fec_enet_get_bd_index(struct bufdesc *base, struct bufdesc *bdp,
struct fec_enet_private *fep)
{
return ((const char *)bdp - (const char *)base) / fep->bufdesc_size;
}
static int fec_enet_get_free_txdesc_num(struct fec_enet_private *fep,
struct fec_enet_priv_tx_q *txq)
{
int entries;
entries = ((const char *)txq->dirty_tx -
(const char *)txq->cur_tx) / fep->bufdesc_size - 1;
return entries > 0 ? entries : entries + txq->tx_ring_size;
}
static void swap_buffer(void *bufaddr, int len)
{
int i;
unsigned int *buf = bufaddr;
for (i = 0; i < len; i += 4, buf++)
swab32s(buf);
}
static void swap_buffer2(void *dst_buf, void *src_buf, int len)
{
int i;
unsigned int *src = src_buf;
unsigned int *dst = dst_buf;
for (i = 0; i < len; i += 4, src++, dst++)
*dst = swab32p(src);
}
static void fec_dump(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct bufdesc *bdp;
struct fec_enet_priv_tx_q *txq;
int index = 0;
netdev_info(ndev, "TX ring dump\n");
pr_info("Nr SC addr len SKB\n");
txq = fep->tx_queue[0];
bdp = txq->tx_bd_base;
do {
pr_info("%3u %c%c 0x%04x 0x%08x %4u %p\n",
index,
bdp == txq->cur_tx ? 'S' : ' ',
bdp == txq->dirty_tx ? 'H' : ' ',
fec16_to_cpu(bdp->cbd_sc),
fec32_to_cpu(bdp->cbd_bufaddr),
fec16_to_cpu(bdp->cbd_datlen),
txq->tx_skbuff[index]);
bdp = fec_enet_get_nextdesc(bdp, fep, 0);
index++;
} while (bdp != txq->tx_bd_base);
}
static inline bool is_ipv4_pkt(struct sk_buff *skb)
{
return skb->protocol == htons(ETH_P_IP) && ip_hdr(skb)->version == 4;
}
static int
fec_enet_clear_csum(struct sk_buff *skb, struct net_device *ndev)
{
/* Only run for packets requiring a checksum. */
if (skb->ip_summed != CHECKSUM_PARTIAL)
return 0;
if (unlikely(skb_cow_head(skb, 0)))
return -1;
if (is_ipv4_pkt(skb))
ip_hdr(skb)->check = 0;
*(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) = 0;
return 0;
}
static struct bufdesc *
fec_enet_txq_submit_frag_skb(struct fec_enet_priv_tx_q *txq,
struct sk_buff *skb,
struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct bufdesc *bdp = txq->cur_tx;
struct bufdesc_ex *ebdp;
int nr_frags = skb_shinfo(skb)->nr_frags;
unsigned short queue = skb_get_queue_mapping(skb);
int frag, frag_len;
unsigned short status;
unsigned int estatus = 0;
skb_frag_t *this_frag;
unsigned int index;
void *bufaddr;
dma_addr_t addr;
int i;
for (frag = 0; frag < nr_frags; frag++) {
this_frag = &skb_shinfo(skb)->frags[frag];
bdp = fec_enet_get_nextdesc(bdp, fep, queue);
ebdp = (struct bufdesc_ex *)bdp;
status = fec16_to_cpu(bdp->cbd_sc);
status &= ~BD_ENET_TX_STATS;
status |= (BD_ENET_TX_TC | BD_ENET_TX_READY);
frag_len = skb_shinfo(skb)->frags[frag].size;
/* Handle the last BD specially */
if (frag == nr_frags - 1) {
status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST);
if (fep->bufdesc_ex) {
estatus |= BD_ENET_TX_INT;
if (unlikely(skb_shinfo(skb)->tx_flags &
SKBTX_HW_TSTAMP && fep->hwts_tx_en))
estatus |= BD_ENET_TX_TS;
}
}
if (fep->bufdesc_ex) {
if (fep->quirks & FEC_QUIRK_HAS_AVB)
estatus |= FEC_TX_BD_FTYPE(queue);
if (skb->ip_summed == CHECKSUM_PARTIAL)
estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS;
ebdp->cbd_bdu = 0;
ebdp->cbd_esc = cpu_to_fec32(estatus);
}
bufaddr = page_address(this_frag->page.p) + this_frag->page_offset;
index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep);
if (((unsigned long) bufaddr) & fep->tx_align ||
fep->quirks & FEC_QUIRK_SWAP_FRAME) {
memcpy(txq->tx_bounce[index], bufaddr, frag_len);
bufaddr = txq->tx_bounce[index];
if (fep->quirks & FEC_QUIRK_SWAP_FRAME)
swap_buffer(bufaddr, frag_len);
}
addr = dma_map_single(&fep->pdev->dev, bufaddr, frag_len,
DMA_TO_DEVICE);
if (dma_mapping_error(&fep->pdev->dev, addr)) {
dev_kfree_skb_any(skb);
if (net_ratelimit())
netdev_err(ndev, "Tx DMA memory map failed\n");
goto dma_mapping_error;
}
bdp->cbd_bufaddr = cpu_to_fec32(addr);
bdp->cbd_datlen = cpu_to_fec16(frag_len);
bdp->cbd_sc = cpu_to_fec16(status);
}
return bdp;
dma_mapping_error:
bdp = txq->cur_tx;
for (i = 0; i < frag; i++) {
bdp = fec_enet_get_nextdesc(bdp, fep, queue);
dma_unmap_single(&fep->pdev->dev, fec32_to_cpu(bdp->cbd_bufaddr),
fec16_to_cpu(bdp->cbd_datlen), DMA_TO_DEVICE);
}
return ERR_PTR(-ENOMEM);
}
static int fec_enet_txq_submit_skb(struct fec_enet_priv_tx_q *txq,
struct sk_buff *skb, struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int nr_frags = skb_shinfo(skb)->nr_frags;
struct bufdesc *bdp, *last_bdp;
void *bufaddr;
dma_addr_t addr;
unsigned short status;
unsigned short buflen;
unsigned short queue;
unsigned int estatus = 0;
unsigned int index;
int entries_free;
entries_free = fec_enet_get_free_txdesc_num(fep, txq);
if (entries_free < MAX_SKB_FRAGS + 1) {
dev_kfree_skb_any(skb);
if (net_ratelimit())
netdev_err(ndev, "NOT enough BD for SG!\n");
return NETDEV_TX_OK;
}
/* Protocol checksum off-load for TCP and UDP. */
if (fec_enet_clear_csum(skb, ndev)) {
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
/* Fill in a Tx ring entry */
bdp = txq->cur_tx;
last_bdp = bdp;
status = fec16_to_cpu(bdp->cbd_sc);
status &= ~BD_ENET_TX_STATS;
/* Set buffer length and buffer pointer */
bufaddr = skb->data;
buflen = skb_headlen(skb);
queue = skb_get_queue_mapping(skb);
index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep);
if (((unsigned long) bufaddr) & fep->tx_align ||
fep->quirks & FEC_QUIRK_SWAP_FRAME) {
memcpy(txq->tx_bounce[index], skb->data, buflen);
bufaddr = txq->tx_bounce[index];
if (fep->quirks & FEC_QUIRK_SWAP_FRAME)
swap_buffer(bufaddr, buflen);
}
/* Push the data cache so the CPM does not get stale memory data. */
addr = dma_map_single(&fep->pdev->dev, bufaddr, buflen, DMA_TO_DEVICE);
if (dma_mapping_error(&fep->pdev->dev, addr)) {
dev_kfree_skb_any(skb);
if (net_ratelimit())
netdev_err(ndev, "Tx DMA memory map failed\n");
return NETDEV_TX_OK;
}
if (nr_frags) {
last_bdp = fec_enet_txq_submit_frag_skb(txq, skb, ndev);
if (IS_ERR(last_bdp))
return NETDEV_TX_OK;
} else {
status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST);
if (fep->bufdesc_ex) {
estatus = BD_ENET_TX_INT;
if (unlikely(skb_shinfo(skb)->tx_flags &
SKBTX_HW_TSTAMP && fep->hwts_tx_en))
estatus |= BD_ENET_TX_TS;
}
}
if (fep->bufdesc_ex) {
struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
fep->hwts_tx_en))
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
if (fep->quirks & FEC_QUIRK_HAS_AVB)
estatus |= FEC_TX_BD_FTYPE(queue);
if (skb->ip_summed == CHECKSUM_PARTIAL)
estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS;
ebdp->cbd_bdu = 0;
ebdp->cbd_esc = cpu_to_fec32(estatus);
}
index = fec_enet_get_bd_index(txq->tx_bd_base, last_bdp, fep);
/* Save skb pointer */
txq->tx_skbuff[index] = skb;
bdp->cbd_datlen = cpu_to_fec16(buflen);
bdp->cbd_bufaddr = cpu_to_fec32(addr);
/* Send it on its way. Tell FEC it's ready, interrupt when done,
* it's the last BD of the frame, and to put the CRC on the end.
*/
status |= (BD_ENET_TX_READY | BD_ENET_TX_TC);
bdp->cbd_sc = cpu_to_fec16(status);
/* If this was the last BD in the ring, start at the beginning again. */
bdp = fec_enet_get_nextdesc(last_bdp, fep, queue);
skb_tx_timestamp(skb);
/* Make sure the update to bdp and tx_skbuff are performed before
* cur_tx.
*/
wmb();
txq->cur_tx = bdp;
/* Trigger transmission start */
writel(0, fep->hwp + FEC_X_DES_ACTIVE(queue));
return 0;
}
static int
fec_enet_txq_put_data_tso(struct fec_enet_priv_tx_q *txq, struct sk_buff *skb,
struct net_device *ndev,
struct bufdesc *bdp, int index, char *data,
int size, bool last_tcp, bool is_last)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct bufdesc_ex *ebdp = container_of(bdp, struct bufdesc_ex, desc);
unsigned short queue = skb_get_queue_mapping(skb);
unsigned short status;
unsigned int estatus = 0;
dma_addr_t addr;
status = fec16_to_cpu(bdp->cbd_sc);
status &= ~BD_ENET_TX_STATS;
status |= (BD_ENET_TX_TC | BD_ENET_TX_READY);
if (((unsigned long) data) & fep->tx_align ||
fep->quirks & FEC_QUIRK_SWAP_FRAME) {
memcpy(txq->tx_bounce[index], data, size);
data = txq->tx_bounce[index];
if (fep->quirks & FEC_QUIRK_SWAP_FRAME)
swap_buffer(data, size);
}
addr = dma_map_single(&fep->pdev->dev, data, size, DMA_TO_DEVICE);
if (dma_mapping_error(&fep->pdev->dev, addr)) {
dev_kfree_skb_any(skb);
if (net_ratelimit())
netdev_err(ndev, "Tx DMA memory map failed\n");
return NETDEV_TX_BUSY;
}
bdp->cbd_datlen = cpu_to_fec16(size);
bdp->cbd_bufaddr = cpu_to_fec32(addr);
if (fep->bufdesc_ex) {
if (fep->quirks & FEC_QUIRK_HAS_AVB)
estatus |= FEC_TX_BD_FTYPE(queue);
if (skb->ip_summed == CHECKSUM_PARTIAL)
estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS;
ebdp->cbd_bdu = 0;
ebdp->cbd_esc = cpu_to_fec32(estatus);
}
/* Handle the last BD specially */
if (last_tcp)
status |= (BD_ENET_TX_LAST | BD_ENET_TX_TC);
if (is_last) {
status |= BD_ENET_TX_INTR;
if (fep->bufdesc_ex)
ebdp->cbd_esc |= cpu_to_fec32(BD_ENET_TX_INT);
}
bdp->cbd_sc = cpu_to_fec16(status);
return 0;
}
static int
fec_enet_txq_put_hdr_tso(struct fec_enet_priv_tx_q *txq,
struct sk_buff *skb, struct net_device *ndev,
struct bufdesc *bdp, int index)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
struct bufdesc_ex *ebdp = container_of(bdp, struct bufdesc_ex, desc);
unsigned short queue = skb_get_queue_mapping(skb);
void *bufaddr;
unsigned long dmabuf;
unsigned short status;
unsigned int estatus = 0;
status = fec16_to_cpu(bdp->cbd_sc);
status &= ~BD_ENET_TX_STATS;
status |= (BD_ENET_TX_TC | BD_ENET_TX_READY);
bufaddr = txq->tso_hdrs + index * TSO_HEADER_SIZE;
dmabuf = txq->tso_hdrs_dma + index * TSO_HEADER_SIZE;
if (((unsigned long)bufaddr) & fep->tx_align ||
fep->quirks & FEC_QUIRK_SWAP_FRAME) {
memcpy(txq->tx_bounce[index], skb->data, hdr_len);
bufaddr = txq->tx_bounce[index];
if (fep->quirks & FEC_QUIRK_SWAP_FRAME)
swap_buffer(bufaddr, hdr_len);
dmabuf = dma_map_single(&fep->pdev->dev, bufaddr,
hdr_len, DMA_TO_DEVICE);
if (dma_mapping_error(&fep->pdev->dev, dmabuf)) {
dev_kfree_skb_any(skb);
if (net_ratelimit())
netdev_err(ndev, "Tx DMA memory map failed\n");
return NETDEV_TX_BUSY;
}
}
bdp->cbd_bufaddr = cpu_to_fec32(dmabuf);
bdp->cbd_datlen = cpu_to_fec16(hdr_len);
if (fep->bufdesc_ex) {
if (fep->quirks & FEC_QUIRK_HAS_AVB)
estatus |= FEC_TX_BD_FTYPE(queue);
if (skb->ip_summed == CHECKSUM_PARTIAL)
estatus |= BD_ENET_TX_PINS | BD_ENET_TX_IINS;
ebdp->cbd_bdu = 0;
ebdp->cbd_esc = cpu_to_fec32(estatus);
}
bdp->cbd_sc = cpu_to_fec16(status);
return 0;
}
static int fec_enet_txq_submit_tso(struct fec_enet_priv_tx_q *txq,
struct sk_buff *skb,
struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
int total_len, data_left;
struct bufdesc *bdp = txq->cur_tx;
unsigned short queue = skb_get_queue_mapping(skb);
struct tso_t tso;
unsigned int index = 0;
int ret;
if (tso_count_descs(skb) >= fec_enet_get_free_txdesc_num(fep, txq)) {
dev_kfree_skb_any(skb);
if (net_ratelimit())
netdev_err(ndev, "NOT enough BD for TSO!\n");
return NETDEV_TX_OK;
}
/* Protocol checksum off-load for TCP and UDP. */
if (fec_enet_clear_csum(skb, ndev)) {
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
/* Initialize the TSO handler, and prepare the first payload */
tso_start(skb, &tso);
total_len = skb->len - hdr_len;
while (total_len > 0) {
char *hdr;
index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep);
data_left = min_t(int, skb_shinfo(skb)->gso_size, total_len);
total_len -= data_left;
/* prepare packet headers: MAC + IP + TCP */
hdr = txq->tso_hdrs + index * TSO_HEADER_SIZE;
tso_build_hdr(skb, hdr, &tso, data_left, total_len == 0);
ret = fec_enet_txq_put_hdr_tso(txq, skb, ndev, bdp, index);
if (ret)
goto err_release;
while (data_left > 0) {
int size;
size = min_t(int, tso.size, data_left);
bdp = fec_enet_get_nextdesc(bdp, fep, queue);
index = fec_enet_get_bd_index(txq->tx_bd_base,
bdp, fep);
ret = fec_enet_txq_put_data_tso(txq, skb, ndev,
bdp, index,
tso.data, size,
size == data_left,
total_len == 0);
if (ret)
goto err_release;
data_left -= size;
tso_build_data(skb, &tso, size);
}
bdp = fec_enet_get_nextdesc(bdp, fep, queue);
}
/* Save skb pointer */
txq->tx_skbuff[index] = skb;
skb_tx_timestamp(skb);
txq->cur_tx = bdp;
/* Trigger transmission start */
if (!(fep->quirks & FEC_QUIRK_ERR007885) ||
!readl(fep->hwp + FEC_X_DES_ACTIVE(queue)) ||
!readl(fep->hwp + FEC_X_DES_ACTIVE(queue)) ||
!readl(fep->hwp + FEC_X_DES_ACTIVE(queue)) ||
!readl(fep->hwp + FEC_X_DES_ACTIVE(queue)))
writel(0, fep->hwp + FEC_X_DES_ACTIVE(queue));
return 0;
err_release:
/* TODO: Release all used data descriptors for TSO */
return ret;
}
static netdev_tx_t
fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int entries_free;
unsigned short queue;
struct fec_enet_priv_tx_q *txq;
struct netdev_queue *nq;
int ret;
queue = skb_get_queue_mapping(skb);
txq = fep->tx_queue[queue];
nq = netdev_get_tx_queue(ndev, queue);
if (skb_is_gso(skb))
ret = fec_enet_txq_submit_tso(txq, skb, ndev);
else
ret = fec_enet_txq_submit_skb(txq, skb, ndev);
if (ret)
return ret;
entries_free = fec_enet_get_free_txdesc_num(fep, txq);
if (entries_free <= txq->tx_stop_threshold)
netif_tx_stop_queue(nq);
return NETDEV_TX_OK;
}
/* Init RX & TX buffer descriptors
*/
static void fec_enet_bd_init(struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
struct fec_enet_priv_tx_q *txq;
struct fec_enet_priv_rx_q *rxq;
struct bufdesc *bdp;
unsigned int i;
unsigned int q;
for (q = 0; q < fep->num_rx_queues; q++) {
/* Initialize the receive buffer descriptors. */
rxq = fep->rx_queue[q];
bdp = rxq->rx_bd_base;
for (i = 0; i < rxq->rx_ring_size; i++) {
/* Initialize the BD for every fragment in the page. */
if (bdp->cbd_bufaddr)
bdp->cbd_sc = cpu_to_fec16(BD_ENET_RX_EMPTY);
else
bdp->cbd_sc = cpu_to_fec16(0);
bdp = fec_enet_get_nextdesc(bdp, fep, q);
}
/* Set the last buffer to wrap */
bdp = fec_enet_get_prevdesc(bdp, fep, q);
bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP);
rxq->cur_rx = rxq->rx_bd_base;
}
for (q = 0; q < fep->num_tx_queues; q++) {
/* ...and the same for transmit */
txq = fep->tx_queue[q];
bdp = txq->tx_bd_base;
txq->cur_tx = bdp;
for (i = 0; i < txq->tx_ring_size; i++) {
/* Initialize the BD for every fragment in the page. */
bdp->cbd_sc = cpu_to_fec16(0);
if (txq->tx_skbuff[i]) {
dev_kfree_skb_any(txq->tx_skbuff[i]);
txq->tx_skbuff[i] = NULL;
}
bdp->cbd_bufaddr = cpu_to_fec32(0);
bdp = fec_enet_get_nextdesc(bdp, fep, q);
}
/* Set the last buffer to wrap */
bdp = fec_enet_get_prevdesc(bdp, fep, q);
bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP);
txq->dirty_tx = bdp;
}
}
static void fec_enet_active_rxring(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int i;
for (i = 0; i < fep->num_rx_queues; i++)
writel(0, fep->hwp + FEC_R_DES_ACTIVE(i));
}
static void fec_enet_enable_ring(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct fec_enet_priv_tx_q *txq;
struct fec_enet_priv_rx_q *rxq;
int i;
for (i = 0; i < fep->num_rx_queues; i++) {
rxq = fep->rx_queue[i];
writel(rxq->bd_dma, fep->hwp + FEC_R_DES_START(i));
writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE(i));
/* enable DMA1/2 */
if (i)
writel(RCMR_MATCHEN | RCMR_CMP(i),
fep->hwp + FEC_RCMR(i));
}
for (i = 0; i < fep->num_tx_queues; i++) {
txq = fep->tx_queue[i];
writel(txq->bd_dma, fep->hwp + FEC_X_DES_START(i));
/* enable DMA1/2 */
if (i)
writel(DMA_CLASS_EN | IDLE_SLOPE(i),
fep->hwp + FEC_DMA_CFG(i));
}
}
static void fec_enet_reset_skb(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct fec_enet_priv_tx_q *txq;
int i, j;
for (i = 0; i < fep->num_tx_queues; i++) {
txq = fep->tx_queue[i];
for (j = 0; j < txq->tx_ring_size; j++) {
if (txq->tx_skbuff[j]) {
dev_kfree_skb_any(txq->tx_skbuff[j]);
txq->tx_skbuff[j] = NULL;
}
}
}
}
/*
* This function is called to start or restart the FEC during a link
* change, transmit timeout, or to reconfigure the FEC. The network
* packet processing for this device must be stopped before this call.
*/
static void
fec_restart(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
u32 val;
u32 temp_mac[2];
u32 rcntl = OPT_FRAME_SIZE | 0x04;
u32 ecntl = 0x2; /* ETHEREN */
/* Whack a reset. We should wait for this.
* For i.MX6SX SOC, enet use AXI bus, we use disable MAC
* instead of reset MAC itself.
*/
if (fep->quirks & FEC_QUIRK_HAS_AVB) {
writel(0, fep->hwp + FEC_ECNTRL);
} else {
writel(1, fep->hwp + FEC_ECNTRL);
udelay(10);
}
/*
* enet-mac reset will reset mac address registers too,
* so need to reconfigure it.
*/
if (fep->quirks & FEC_QUIRK_ENET_MAC) {
memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN);
writel((__force u32)cpu_to_be32(temp_mac[0]),
fep->hwp + FEC_ADDR_LOW);
writel((__force u32)cpu_to_be32(temp_mac[1]),
fep->hwp + FEC_ADDR_HIGH);
}
/* Clear any outstanding interrupt. */
writel(0xffffffff, fep->hwp + FEC_IEVENT);
fec_enet_bd_init(ndev);
fec_enet_enable_ring(ndev);
/* Reset tx SKB buffers. */
fec_enet_reset_skb(ndev);
/* Enable MII mode */
if (fep->full_duplex == DUPLEX_FULL) {
/* FD enable */
writel(0x04, fep->hwp + FEC_X_CNTRL);
} else {
/* No Rcv on Xmit */
rcntl |= 0x02;
writel(0x0, fep->hwp + FEC_X_CNTRL);
}
/* Set MII speed */
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
#if !defined(CONFIG_M5272)
if (fep->quirks & FEC_QUIRK_HAS_RACC) {
/* set RX checksum */
val = readl(fep->hwp + FEC_RACC);
if (fep->csum_flags & FLAG_RX_CSUM_ENABLED)
val |= FEC_RACC_OPTIONS;
else
val &= ~FEC_RACC_OPTIONS;
writel(val, fep->hwp + FEC_RACC);
}
#endif
/*
* The phy interface and speed need to get configured
* differently on enet-mac.
*/
if (fep->quirks & FEC_QUIRK_ENET_MAC) {
/* Enable flow control and length check */
rcntl |= 0x40000000 | 0x00000020;
/* RGMII, RMII or MII */
if (fep->phy_interface == PHY_INTERFACE_MODE_RGMII ||
fep->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
fep->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID ||
fep->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID)
rcntl |= (1 << 6);
else if (fep->phy_interface == PHY_INTERFACE_MODE_RMII)
rcntl |= (1 << 8);
else
rcntl &= ~(1 << 8);
/* 1G, 100M or 10M */
if (fep->phy_dev) {
if (fep->phy_dev->speed == SPEED_1000)
ecntl |= (1 << 5);
else if (fep->phy_dev->speed == SPEED_100)
rcntl &= ~(1 << 9);
else
rcntl |= (1 << 9);
}
} else {
#ifdef FEC_MIIGSK_ENR
if (fep->quirks & FEC_QUIRK_USE_GASKET) {
u32 cfgr;
/* disable the gasket and wait */
writel(0, fep->hwp + FEC_MIIGSK_ENR);
while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4)
udelay(1);
/*
* configure the gasket:
* RMII, 50 MHz, no loopback, no echo
* MII, 25 MHz, no loopback, no echo
*/
cfgr = (fep->phy_interface == PHY_INTERFACE_MODE_RMII)
? BM_MIIGSK_CFGR_RMII : BM_MIIGSK_CFGR_MII;
if (fep->phy_dev && fep->phy_dev->speed == SPEED_10)
cfgr |= BM_MIIGSK_CFGR_FRCONT_10M;
writel(cfgr, fep->hwp + FEC_MIIGSK_CFGR);
/* re-enable the gasket */
writel(2, fep->hwp + FEC_MIIGSK_ENR);
}
#endif
}
#if !defined(CONFIG_M5272)
/* enable pause frame*/
if ((fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) ||
((fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) &&
fep->phy_dev && fep->phy_dev->pause)) {
rcntl |= FEC_ENET_FCE;
/* set FIFO threshold parameter to reduce overrun */
writel(FEC_ENET_RSEM_V, fep->hwp + FEC_R_FIFO_RSEM);
writel(FEC_ENET_RSFL_V, fep->hwp + FEC_R_FIFO_RSFL);
writel(FEC_ENET_RAEM_V, fep->hwp + FEC_R_FIFO_RAEM);
writel(FEC_ENET_RAFL_V, fep->hwp + FEC_R_FIFO_RAFL);
/* OPD */
writel(FEC_ENET_OPD_V, fep->hwp + FEC_OPD);
} else {
rcntl &= ~FEC_ENET_FCE;
}
#endif /* !defined(CONFIG_M5272) */
writel(rcntl, fep->hwp + FEC_R_CNTRL);
/* Setup multicast filter. */
set_multicast_list(ndev);
#ifndef CONFIG_M5272
writel(0, fep->hwp + FEC_HASH_TABLE_HIGH);
writel(0, fep->hwp + FEC_HASH_TABLE_LOW);
#endif
if (fep->quirks & FEC_QUIRK_ENET_MAC) {
/* enable ENET endian swap */
ecntl |= (1 << 8);
/* enable ENET store and forward mode */
writel(1 << 8, fep->hwp + FEC_X_WMRK);
}
if (fep->bufdesc_ex)
ecntl |= (1 << 4);
#ifndef CONFIG_M5272
/* Enable the MIB statistic event counters */
writel(0 << 31, fep->hwp + FEC_MIB_CTRLSTAT);
#endif
/* And last, enable the transmit and receive processing */
writel(ecntl, fep->hwp + FEC_ECNTRL);
fec_enet_active_rxring(ndev);
if (fep->bufdesc_ex)
fec_ptp_start_cyclecounter(ndev);
/* Enable interrupts we wish to service */
if (fep->link)
writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
else
writel(FEC_ENET_MII, fep->hwp + FEC_IMASK);
/* Init the interrupt coalescing */
fec_enet_itr_coal_init(ndev);
}
static void
fec_stop(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
u32 rmii_mode = readl(fep->hwp + FEC_R_CNTRL) & (1 << 8);
u32 val;
/* We cannot expect a graceful transmit stop without link !!! */
if (fep->link) {
writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */
udelay(10);
if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA))
netdev_err(ndev, "Graceful transmit stop did not complete!\n");
}
/* Whack a reset. We should wait for this.
* For i.MX6SX SOC, enet use AXI bus, we use disable MAC
* instead of reset MAC itself.
*/
if (!(fep->wol_flag & FEC_WOL_FLAG_SLEEP_ON)) {
if (fep->quirks & FEC_QUIRK_HAS_AVB) {
writel(0, fep->hwp + FEC_ECNTRL);
} else {
writel(1, fep->hwp + FEC_ECNTRL);
udelay(10);
}
writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
} else {
writel(FEC_DEFAULT_IMASK | FEC_ENET_WAKEUP, fep->hwp + FEC_IMASK);
val = readl(fep->hwp + FEC_ECNTRL);
val |= (FEC_ECR_MAGICEN | FEC_ECR_SLEEP);
writel(val, fep->hwp + FEC_ECNTRL);
if (pdata && pdata->sleep_mode_enable)
pdata->sleep_mode_enable(true);
}
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
/* We have to keep ENET enabled to have MII interrupt stay working */
if (fep->quirks & FEC_QUIRK_ENET_MAC &&
!(fep->wol_flag & FEC_WOL_FLAG_SLEEP_ON)) {
writel(2, fep->hwp + FEC_ECNTRL);
writel(rmii_mode, fep->hwp + FEC_R_CNTRL);
}
}
static void
fec_timeout(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
fec_dump(ndev);
ndev->stats.tx_errors++;
schedule_work(&fep->tx_timeout_work);
}
static void fec_enet_timeout_work(struct work_struct *work)
{
struct fec_enet_private *fep =
container_of(work, struct fec_enet_private, tx_timeout_work);
struct net_device *ndev = fep->netdev;
rtnl_lock();
if (netif_device_present(ndev) || netif_running(ndev)) {
napi_disable(&fep->napi);
netif_tx_lock_bh(ndev);
fec_restart(ndev);
netif_wake_queue(ndev);
netif_tx_unlock_bh(ndev);
napi_enable(&fep->napi);
}
rtnl_unlock();
}
static void
fec_enet_hwtstamp(struct fec_enet_private *fep, unsigned ts,
struct skb_shared_hwtstamps *hwtstamps)
{
unsigned long flags;
u64 ns;
spin_lock_irqsave(&fep->tmreg_lock, flags);
ns = timecounter_cyc2time(&fep->tc, ts);
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
memset(hwtstamps, 0, sizeof(*hwtstamps));
hwtstamps->hwtstamp = ns_to_ktime(ns);
}
static void
fec_enet_tx_queue(struct net_device *ndev, u16 queue_id)
{
struct fec_enet_private *fep;
struct bufdesc *bdp;
unsigned short status;
struct sk_buff *skb;
struct fec_enet_priv_tx_q *txq;
struct netdev_queue *nq;
int index = 0;
int entries_free;
fep = netdev_priv(ndev);
queue_id = FEC_ENET_GET_QUQUE(queue_id);
txq = fep->tx_queue[queue_id];
/* get next bdp of dirty_tx */
nq = netdev_get_tx_queue(ndev, queue_id);
bdp = txq->dirty_tx;
/* get next bdp of dirty_tx */
bdp = fec_enet_get_nextdesc(bdp, fep, queue_id);
while (bdp != READ_ONCE(txq->cur_tx)) {
/* Order the load of cur_tx and cbd_sc */
rmb();
status = fec16_to_cpu(READ_ONCE(bdp->cbd_sc));
if (status & BD_ENET_TX_READY)
break;
index = fec_enet_get_bd_index(txq->tx_bd_base, bdp, fep);
skb = txq->tx_skbuff[index];
txq->tx_skbuff[index] = NULL;
if (!IS_TSO_HEADER(txq, fec32_to_cpu(bdp->cbd_bufaddr)))
dma_unmap_single(&fep->pdev->dev,
fec32_to_cpu(bdp->cbd_bufaddr),
fec16_to_cpu(bdp->cbd_datlen),
DMA_TO_DEVICE);
bdp->cbd_bufaddr = cpu_to_fec32(0);
if (!skb) {
bdp = fec_enet_get_nextdesc(bdp, fep, queue_id);
continue;
}
/* Check for errors. */
if (status & (BD_ENET_TX_HB | BD_ENET_TX_LC |
BD_ENET_TX_RL | BD_ENET_TX_UN |
BD_ENET_TX_CSL)) {
ndev->stats.tx_errors++;
if (status & BD_ENET_TX_HB) /* No heartbeat */
ndev->stats.tx_heartbeat_errors++;
if (status & BD_ENET_TX_LC) /* Late collision */
ndev->stats.tx_window_errors++;
if (status & BD_ENET_TX_RL) /* Retrans limit */
ndev->stats.tx_aborted_errors++;
if (status & BD_ENET_TX_UN) /* Underrun */
ndev->stats.tx_fifo_errors++;
if (status & BD_ENET_TX_CSL) /* Carrier lost */
ndev->stats.tx_carrier_errors++;
} else {
ndev->stats.tx_packets++;
ndev->stats.tx_bytes += skb->len;
}
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS) &&
fep->bufdesc_ex) {
struct skb_shared_hwtstamps shhwtstamps;
struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
fec_enet_hwtstamp(fep, fec32_to_cpu(ebdp->ts), &shhwtstamps);
skb_tstamp_tx(skb, &shhwtstamps);
}
/* Deferred means some collisions occurred during transmit,
* but we eventually sent the packet OK.
*/
if (status & BD_ENET_TX_DEF)
ndev->stats.collisions++;
/* Free the sk buffer associated with this last transmit */
dev_kfree_skb_any(skb);
/* Make sure the update to bdp and tx_skbuff are performed
* before dirty_tx
*/
wmb();
txq->dirty_tx = bdp;
/* Update pointer to next buffer descriptor to be transmitted */
bdp = fec_enet_get_nextdesc(bdp, fep, queue_id);
/* Since we have freed up a buffer, the ring is no longer full
*/
if (netif_queue_stopped(ndev)) {
entries_free = fec_enet_get_free_txdesc_num(fep, txq);
if (entries_free >= txq->tx_wake_threshold)
netif_tx_wake_queue(nq);
}
}
/* ERR006538: Keep the transmitter going */
if (bdp != txq->cur_tx &&
readl(fep->hwp + FEC_X_DES_ACTIVE(queue_id)) == 0)
writel(0, fep->hwp + FEC_X_DES_ACTIVE(queue_id));
}
static void
fec_enet_tx(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
u16 queue_id;
/* First process class A queue, then Class B and Best Effort queue */
for_each_set_bit(queue_id, &fep->work_tx, FEC_ENET_MAX_TX_QS) {
clear_bit(queue_id, &fep->work_tx);
fec_enet_tx_queue(ndev, queue_id);
}
return;
}
static int
fec_enet_new_rxbdp(struct net_device *ndev, struct bufdesc *bdp, struct sk_buff *skb)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int off;
off = ((unsigned long)skb->data) & fep->rx_align;
if (off)
skb_reserve(skb, fep->rx_align + 1 - off);
bdp->cbd_bufaddr = cpu_to_fec32(dma_map_single(&fep->pdev->dev, skb->data, FEC_ENET_RX_FRSIZE - fep->rx_align, DMA_FROM_DEVICE));
if (dma_mapping_error(&fep->pdev->dev, fec32_to_cpu(bdp->cbd_bufaddr))) {
if (net_ratelimit())
netdev_err(ndev, "Rx DMA memory map failed\n");
return -ENOMEM;
}
return 0;
}
static bool fec_enet_copybreak(struct net_device *ndev, struct sk_buff **skb,
struct bufdesc *bdp, u32 length, bool swap)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct sk_buff *new_skb;
if (length > fep->rx_copybreak)
return false;
new_skb = netdev_alloc_skb(ndev, length);
if (!new_skb)
return false;
dma_sync_single_for_cpu(&fep->pdev->dev,
fec32_to_cpu(bdp->cbd_bufaddr),
FEC_ENET_RX_FRSIZE - fep->rx_align,
DMA_FROM_DEVICE);
if (!swap)
memcpy(new_skb->data, (*skb)->data, length);
else
swap_buffer2(new_skb->data, (*skb)->data, length);
*skb = new_skb;
return true;
}
/* During a receive, the cur_rx points to the current incoming buffer.
* When we update through the ring, if the next incoming buffer has
* not been given to the system, we just set the empty indicator,
* effectively tossing the packet.
*/
static int
fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct fec_enet_priv_rx_q *rxq;
struct bufdesc *bdp;
unsigned short status;
struct sk_buff *skb_new = NULL;
struct sk_buff *skb;
ushort pkt_len;
__u8 *data;
int pkt_received = 0;
struct bufdesc_ex *ebdp = NULL;
bool vlan_packet_rcvd = false;
u16 vlan_tag;
int index = 0;
bool is_copybreak;
bool need_swap = fep->quirks & FEC_QUIRK_SWAP_FRAME;
#ifdef CONFIG_M532x
flush_cache_all();
#endif
queue_id = FEC_ENET_GET_QUQUE(queue_id);
rxq = fep->rx_queue[queue_id];
/* First, grab all of the stats for the incoming packet.
* These get messed up if we get called due to a busy condition.
*/
bdp = rxq->cur_rx;
while (!((status = fec16_to_cpu(bdp->cbd_sc)) & BD_ENET_RX_EMPTY)) {
if (pkt_received >= budget)
break;
pkt_received++;
/* Since we have allocated space to hold a complete frame,
* the last indicator should be set.
*/
if ((status & BD_ENET_RX_LAST) == 0)
netdev_err(ndev, "rcv is not +last\n");
writel(FEC_ENET_RXF, fep->hwp + FEC_IEVENT);
/* Check for errors. */
if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
BD_ENET_RX_CR | BD_ENET_RX_OV)) {
ndev->stats.rx_errors++;
if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
/* Frame too long or too short. */
ndev->stats.rx_length_errors++;
}
if (status & BD_ENET_RX_NO) /* Frame alignment */
ndev->stats.rx_frame_errors++;
if (status & BD_ENET_RX_CR) /* CRC Error */
ndev->stats.rx_crc_errors++;
if (status & BD_ENET_RX_OV) /* FIFO overrun */
ndev->stats.rx_fifo_errors++;
}
/* Report late collisions as a frame error.
* On this error, the BD is closed, but we don't know what we
* have in the buffer. So, just drop this frame on the floor.
*/
if (status & BD_ENET_RX_CL) {
ndev->stats.rx_errors++;
ndev->stats.rx_frame_errors++;
goto rx_processing_done;
}
/* Process the incoming frame. */
ndev->stats.rx_packets++;
pkt_len = fec16_to_cpu(bdp->cbd_datlen);
ndev->stats.rx_bytes += pkt_len;
index = fec_enet_get_bd_index(rxq->rx_bd_base, bdp, fep);
skb = rxq->rx_skbuff[index];
/* The packet length includes FCS, but we don't want to
* include that when passing upstream as it messes up
* bridging applications.
*/
is_copybreak = fec_enet_copybreak(ndev, &skb, bdp, pkt_len - 4,
need_swap);
if (!is_copybreak) {
skb_new = netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE);
if (unlikely(!skb_new)) {
ndev->stats.rx_dropped++;
goto rx_processing_done;
}
dma_unmap_single(&fep->pdev->dev,
fec32_to_cpu(bdp->cbd_bufaddr),
FEC_ENET_RX_FRSIZE - fep->rx_align,
DMA_FROM_DEVICE);
}
prefetch(skb->data - NET_IP_ALIGN);
skb_put(skb, pkt_len - 4);
data = skb->data;
if (!is_copybreak && need_swap)
swap_buffer(data, pkt_len);
/* Extract the enhanced buffer descriptor */
ebdp = NULL;
if (fep->bufdesc_ex)
ebdp = (struct bufdesc_ex *)bdp;
/* If this is a VLAN packet remove the VLAN Tag */
vlan_packet_rcvd = false;
if ((ndev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
fep->bufdesc_ex &&
(ebdp->cbd_esc & cpu_to_fec32(BD_ENET_RX_VLAN))) {
/* Push and remove the vlan tag */
struct vlan_hdr *vlan_header =
(struct vlan_hdr *) (data + ETH_HLEN);
vlan_tag = ntohs(vlan_header->h_vlan_TCI);
vlan_packet_rcvd = true;
memmove(skb->data + VLAN_HLEN, data, ETH_ALEN * 2);
skb_pull(skb, VLAN_HLEN);
}
skb->protocol = eth_type_trans(skb, ndev);
/* Get receive timestamp from the skb */
if (fep->hwts_rx_en && fep->bufdesc_ex)
fec_enet_hwtstamp(fep, fec32_to_cpu(ebdp->ts),
skb_hwtstamps(skb));
if (fep->bufdesc_ex &&
(fep->csum_flags & FLAG_RX_CSUM_ENABLED)) {
if (!(ebdp->cbd_esc & cpu_to_fec32(FLAG_RX_CSUM_ERROR))) {
/* don't check it */
skb->ip_summed = CHECKSUM_UNNECESSARY;
} else {
skb_checksum_none_assert(skb);
}
}
/* Handle received VLAN packets */
if (vlan_packet_rcvd)
__vlan_hwaccel_put_tag(skb,
htons(ETH_P_8021Q),
vlan_tag);
napi_gro_receive(&fep->napi, skb);
if (is_copybreak) {
dma_sync_single_for_device(&fep->pdev->dev,
fec32_to_cpu(bdp->cbd_bufaddr),
FEC_ENET_RX_FRSIZE - fep->rx_align,
DMA_FROM_DEVICE);
} else {
rxq->rx_skbuff[index] = skb_new;
fec_enet_new_rxbdp(ndev, bdp, skb_new);
}
rx_processing_done:
/* Clear the status flags for this buffer */
status &= ~BD_ENET_RX_STATS;
/* Mark the buffer empty */
status |= BD_ENET_RX_EMPTY;
bdp->cbd_sc = cpu_to_fec16(status);
if (fep->bufdesc_ex) {
struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
ebdp->cbd_esc = cpu_to_fec32(BD_ENET_RX_INT);
ebdp->cbd_prot = 0;
ebdp->cbd_bdu = 0;
}
/* Update BD pointer to next entry */
bdp = fec_enet_get_nextdesc(bdp, fep, queue_id);
/* Doing this here will keep the FEC running while we process
* incoming frames. On a heavily loaded network, we should be
* able to keep up at the expense of system resources.
*/
writel(0, fep->hwp + FEC_R_DES_ACTIVE(queue_id));
}
rxq->cur_rx = bdp;
return pkt_received;
}
static int
fec_enet_rx(struct net_device *ndev, int budget)
{
int pkt_received = 0;
u16 queue_id;
struct fec_enet_private *fep = netdev_priv(ndev);
for_each_set_bit(queue_id, &fep->work_rx, FEC_ENET_MAX_RX_QS) {
clear_bit(queue_id, &fep->work_rx);
pkt_received += fec_enet_rx_queue(ndev,
budget - pkt_received, queue_id);
}
return pkt_received;
}
static bool
fec_enet_collect_events(struct fec_enet_private *fep, uint int_events)
{
if (int_events == 0)
return false;
if (int_events & FEC_ENET_RXF)
fep->work_rx |= (1 << 2);
if (int_events & FEC_ENET_RXF_1)
fep->work_rx |= (1 << 0);
if (int_events & FEC_ENET_RXF_2)
fep->work_rx |= (1 << 1);
if (int_events & FEC_ENET_TXF)
fep->work_tx |= (1 << 2);
if (int_events & FEC_ENET_TXF_1)
fep->work_tx |= (1 << 0);
if (int_events & FEC_ENET_TXF_2)
fep->work_tx |= (1 << 1);
return true;
}
static irqreturn_t
fec_enet_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct fec_enet_private *fep = netdev_priv(ndev);
uint int_events;
irqreturn_t ret = IRQ_NONE;
int_events = readl(fep->hwp + FEC_IEVENT);
writel(int_events, fep->hwp + FEC_IEVENT);
fec_enet_collect_events(fep, int_events);
if ((fep->work_tx || fep->work_rx) && fep->link) {
ret = IRQ_HANDLED;
if (napi_schedule_prep(&fep->napi)) {
/* Disable the NAPI interrupts */
writel(FEC_ENET_MII, fep->hwp + FEC_IMASK);
__napi_schedule(&fep->napi);
}
}
if (int_events & FEC_ENET_MII) {
ret = IRQ_HANDLED;
complete(&fep->mdio_done);
}
if (fep->ptp_clock)
fec_ptp_check_pps_event(fep);
return ret;
}
static int fec_enet_rx_napi(struct napi_struct *napi, int budget)
{
struct net_device *ndev = napi->dev;
struct fec_enet_private *fep = netdev_priv(ndev);
int pkts;
pkts = fec_enet_rx(ndev, budget);
fec_enet_tx(ndev);
if (pkts < budget) {
napi_complete(napi);
writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
}
return pkts;
}
/* ------------------------------------------------------------------------- */
static void fec_get_mac(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct fec_platform_data *pdata = dev_get_platdata(&fep->pdev->dev);
unsigned char *iap, tmpaddr[ETH_ALEN];
/*
* try to get mac address in following order:
*
* 1) module parameter via kernel command line in form
* fec.macaddr=0x00,0x04,0x9f,0x01,0x30,0xe0
*/
iap = macaddr;
/*
* 2) from device tree data
*/
if (!is_valid_ether_addr(iap)) {
struct device_node *np = fep->pdev->dev.of_node;
if (np) {
const char *mac = of_get_mac_address(np);
if (mac)
iap = (unsigned char *) mac;
}
}
/*
* 3) from flash or fuse (via platform data)
*/
if (!is_valid_ether_addr(iap)) {
#ifdef CONFIG_M5272
if (FEC_FLASHMAC)
iap = (unsigned char *)FEC_FLASHMAC;
#else
if (pdata)
iap = (unsigned char *)&pdata->mac;
#endif
}
/*
* 4) FEC mac registers set by bootloader
*/
if (!is_valid_ether_addr(iap)) {
*((__be32 *) &tmpaddr[0]) =
cpu_to_be32(readl(fep->hwp + FEC_ADDR_LOW));
*((__be16 *) &tmpaddr[4]) =
cpu_to_be16(readl(fep->hwp + FEC_ADDR_HIGH) >> 16);
iap = &tmpaddr[0];
}
/*
* 5) random mac address
*/
if (!is_valid_ether_addr(iap)) {
/* Report it and use a random ethernet address instead */
netdev_err(ndev, "Invalid MAC address: %pM\n", iap);
eth_hw_addr_random(ndev);
netdev_info(ndev, "Using random MAC address: %pM\n",
ndev->dev_addr);
return;
}
memcpy(ndev->dev_addr, iap, ETH_ALEN);
/* Adjust MAC if using macaddr */
if (iap == macaddr)
ndev->dev_addr[ETH_ALEN-1] = macaddr[ETH_ALEN-1] + fep->dev_id;
}
/* ------------------------------------------------------------------------- */
/*
* Phy section
*/
static void fec_enet_adjust_link(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct phy_device *phy_dev = fep->phy_dev;
int status_change = 0;
/* Prevent a state halted on mii error */
if (fep->mii_timeout && phy_dev->state == PHY_HALTED) {
phy_dev->state = PHY_RESUMING;
return;
}
/*
* If the netdev is down, or is going down, we're not interested
* in link state events, so just mark our idea of the link as down
* and ignore the event.
*/
if (!netif_running(ndev) || !netif_device_present(ndev)) {
fep->link = 0;
} else if (phy_dev->link) {
if (!fep->link) {
fep->link = phy_dev->link;
status_change = 1;
}
if (fep->full_duplex != phy_dev->duplex) {
fep->full_duplex = phy_dev->duplex;
status_change = 1;
}
if (phy_dev->speed != fep->speed) {
fep->speed = phy_dev->speed;
status_change = 1;
}
/* if any of the above changed restart the FEC */
if (status_change) {
napi_disable(&fep->napi);
netif_tx_lock_bh(ndev);
fec_restart(ndev);
netif_wake_queue(ndev);
netif_tx_unlock_bh(ndev);
napi_enable(&fep->napi);
}
} else {
if (fep->link) {
napi_disable(&fep->napi);
netif_tx_lock_bh(ndev);
fec_stop(ndev);
netif_tx_unlock_bh(ndev);
napi_enable(&fep->napi);
fep->link = phy_dev->link;
status_change = 1;
}
}
if (status_change)
phy_print_status(phy_dev);
}
static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
{
struct fec_enet_private *fep = bus->priv;
struct device *dev = &fep->pdev->dev;
unsigned long time_left;
int ret = 0;
ret = pm_runtime_get_sync(dev);
if (ret < 0)
return ret;
fep->mii_timeout = 0;
reinit_completion(&fep->mdio_done);
/* start a read op */
writel(FEC_MMFR_ST | FEC_MMFR_OP_READ |
FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
FEC_MMFR_TA, fep->hwp + FEC_MII_DATA);
/* wait for end of transfer */
time_left = wait_for_completion_timeout(&fep->mdio_done,
usecs_to_jiffies(FEC_MII_TIMEOUT));
if (time_left == 0) {
fep->mii_timeout = 1;
netdev_err(fep->netdev, "MDIO read timeout\n");
ret = -ETIMEDOUT;
goto out;
}
ret = FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA));
out:
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
return ret;
}
static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
u16 value)
{
struct fec_enet_private *fep = bus->priv;
struct device *dev = &fep->pdev->dev;
unsigned long time_left;
int ret;
ret = pm_runtime_get_sync(dev);
if (ret < 0)
return ret;
else
ret = 0;
fep->mii_timeout = 0;
reinit_completion(&fep->mdio_done);
/* start a write op */
writel(FEC_MMFR_ST | FEC_MMFR_OP_WRITE |
FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
FEC_MMFR_TA | FEC_MMFR_DATA(value),
fep->hwp + FEC_MII_DATA);
/* wait for end of transfer */
time_left = wait_for_completion_timeout(&fep->mdio_done,
usecs_to_jiffies(FEC_MII_TIMEOUT));
if (time_left == 0) {
fep->mii_timeout = 1;
netdev_err(fep->netdev, "MDIO write timeout\n");
ret = -ETIMEDOUT;
}
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
return ret;
}
static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int ret;
if (enable) {
ret = clk_prepare_enable(fep->clk_ahb);
if (ret)
return ret;
if (fep->clk_enet_out) {
ret = clk_prepare_enable(fep->clk_enet_out);
if (ret)
goto failed_clk_enet_out;
}
if (fep->clk_ptp) {
mutex_lock(&fep->ptp_clk_mutex);
ret = clk_prepare_enable(fep->clk_ptp);
if (ret) {
mutex_unlock(&fep->ptp_clk_mutex);
goto failed_clk_ptp;
} else {
fep->ptp_clk_on = true;
}
mutex_unlock(&fep->ptp_clk_mutex);
}
if (fep->clk_ref) {
ret = clk_prepare_enable(fep->clk_ref);
if (ret)
goto failed_clk_ref;
}
} else {
clk_disable_unprepare(fep->clk_ahb);
if (fep->clk_enet_out)
clk_disable_unprepare(fep->clk_enet_out);
if (fep->clk_ptp) {
mutex_lock(&fep->ptp_clk_mutex);
clk_disable_unprepare(fep->clk_ptp);
fep->ptp_clk_on = false;
mutex_unlock(&fep->ptp_clk_mutex);
}
if (fep->clk_ref)
clk_disable_unprepare(fep->clk_ref);
}
return 0;
failed_clk_ref:
if (fep->clk_ref)
clk_disable_unprepare(fep->clk_ref);
failed_clk_ptp:
if (fep->clk_enet_out)
clk_disable_unprepare(fep->clk_enet_out);
failed_clk_enet_out:
clk_disable_unprepare(fep->clk_ahb);
return ret;
}
static int fec_enet_mii_probe(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct phy_device *phy_dev = NULL;
char mdio_bus_id[MII_BUS_ID_SIZE];
char phy_name[MII_BUS_ID_SIZE + 3];
int phy_id;
int dev_id = fep->dev_id;
fep->phy_dev = NULL;
if (fep->phy_node) {
phy_dev = of_phy_connect(ndev, fep->phy_node,
&fec_enet_adjust_link, 0,
fep->phy_interface);
if (!phy_dev)
return -ENODEV;
} else {
/* check for attached phy */
for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) {
if (!mdiobus_is_registered_device(fep->mii_bus, phy_id))
continue;
if (dev_id--)
continue;
strlcpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
break;
}
if (phy_id >= PHY_MAX_ADDR) {
netdev_info(ndev, "no PHY, assuming direct connection to switch\n");
strlcpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
phy_id = 0;
}
snprintf(phy_name, sizeof(phy_name),
PHY_ID_FMT, mdio_bus_id, phy_id);
phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link,
fep->phy_interface);
}
if (IS_ERR(phy_dev)) {
netdev_err(ndev, "could not attach to PHY\n");
return PTR_ERR(phy_dev);
}
/* mask with MAC supported features */
if (fep->quirks & FEC_QUIRK_HAS_GBIT) {
phy_dev->supported &= PHY_GBIT_FEATURES;
phy_dev->supported &= ~SUPPORTED_1000baseT_Half;
#if !defined(CONFIG_M5272)
phy_dev->supported |= SUPPORTED_Pause;
#endif
}
else
phy_dev->supported &= PHY_BASIC_FEATURES;
phy_dev->advertising = phy_dev->supported;
fep->phy_dev = phy_dev;
fep->link = 0;
fep->full_duplex = 0;
phy_attached_info(phy_dev);
return 0;
}
static int fec_enet_mii_init(struct platform_device *pdev)
{
static struct mii_bus *fec0_mii_bus;
struct net_device *ndev = platform_get_drvdata(pdev);
struct fec_enet_private *fep = netdev_priv(ndev);
struct device_node *node;
int err = -ENXIO;
u32 mii_speed, holdtime;
/*
* The i.MX28 dual fec interfaces are not equal.
* Here are the differences:
*
* - fec0 supports MII & RMII modes while fec1 only supports RMII
* - fec0 acts as the 1588 time master while fec1 is slave
* - external phys can only be configured by fec0
*
* That is to say fec1 can not work independently. It only works
* when fec0 is working. The reason behind this design is that the
* second interface is added primarily for Switch mode.
*
* Because of the last point above, both phys are attached on fec0
* mdio interface in board design, and need to be configured by
* fec0 mii_bus.
*/
if ((fep->quirks & FEC_QUIRK_SINGLE_MDIO) && fep->dev_id > 0) {
/* fec1 uses fec0 mii_bus */
if (mii_cnt && fec0_mii_bus) {
fep->mii_bus = fec0_mii_bus;
mii_cnt++;
return 0;
}
return -ENOENT;
}
fep->mii_timeout = 0;
/*
* Set MII speed to 2.5 MHz (= clk_get_rate() / 2 * phy_speed)
*
* The formula for FEC MDC is 'ref_freq / (MII_SPEED x 2)' while
* for ENET-MAC is 'ref_freq / ((MII_SPEED + 1) x 2)'. The i.MX28
* Reference Manual has an error on this, and gets fixed on i.MX6Q
* document.
*/
mii_speed = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 5000000);
if (fep->quirks & FEC_QUIRK_ENET_MAC)
mii_speed--;
if (mii_speed > 63) {
dev_err(&pdev->dev,
"fec clock (%lu) to fast to get right mii speed\n",
clk_get_rate(fep->clk_ipg));
err = -EINVAL;
goto err_out;
}
/*
* The i.MX28 and i.MX6 types have another filed in the MSCR (aka
* MII_SPEED) register that defines the MDIO output hold time. Earlier
* versions are RAZ there, so just ignore the difference and write the
* register always.
* The minimal hold time according to IEE802.3 (clause 22) is 10 ns.
* HOLDTIME + 1 is the number of clk cycles the fec is holding the
* output.
* The HOLDTIME bitfield takes values between 0 and 7 (inclusive).
* Given that ceil(clkrate / 5000000) <= 64, the calculation for
* holdtime cannot result in a value greater than 3.
*/
holdtime = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 100000000) - 1;
fep->phy_speed = mii_speed << 1 | holdtime << 8;
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
fep->mii_bus = mdiobus_alloc();
if (fep->mii_bus == NULL) {
err = -ENOMEM;
goto err_out;
}
fep->mii_bus->name = "fec_enet_mii_bus";
fep->mii_bus->read = fec_enet_mdio_read;
fep->mii_bus->write = fec_enet_mdio_write;
snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
pdev->name, fep->dev_id + 1);
fep->mii_bus->priv = fep;
fep->mii_bus->parent = &pdev->dev;
node = of_get_child_by_name(pdev->dev.of_node, "mdio");
if (node) {
err = of_mdiobus_register(fep->mii_bus, node);
of_node_put(node);
} else {
err = mdiobus_register(fep->mii_bus);
}
if (err)
goto err_out_free_mdiobus;
mii_cnt++;
/* save fec0 mii_bus */
if (fep->quirks & FEC_QUIRK_SINGLE_MDIO)
fec0_mii_bus = fep->mii_bus;
return 0;
err_out_free_mdiobus:
mdiobus_free(fep->mii_bus);
err_out:
return err;
}
static void fec_enet_mii_remove(struct fec_enet_private *fep)
{
if (--mii_cnt == 0) {
mdiobus_unregister(fep->mii_bus);
mdiobus_free(fep->mii_bus);
}
}
static int fec_enet_get_settings(struct net_device *ndev,
struct ethtool_cmd *cmd)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct phy_device *phydev = fep->phy_dev;
if (!phydev)
return -ENODEV;
return phy_ethtool_gset(phydev, cmd);
}
static int fec_enet_set_settings(struct net_device *ndev,
struct ethtool_cmd *cmd)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct phy_device *phydev = fep->phy_dev;
if (!phydev)
return -ENODEV;
return phy_ethtool_sset(phydev, cmd);
}
static void fec_enet_get_drvinfo(struct net_device *ndev,
struct ethtool_drvinfo *info)
{
struct fec_enet_private *fep = netdev_priv(ndev);
strlcpy(info->driver, fep->pdev->dev.driver->name,
sizeof(info->driver));
strlcpy(info->version, "Revision: 1.0", sizeof(info->version));
strlcpy(info->bus_info, dev_name(&ndev->dev), sizeof(info->bus_info));
}
static int fec_enet_get_regs_len(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct resource *r;
int s = 0;
r = platform_get_resource(fep->pdev, IORESOURCE_MEM, 0);
if (r)
s = resource_size(r);
return s;
}
/* List of registers that can be safety be read to dump them with ethtool */
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM)
static u32 fec_enet_register_offset[] = {
FEC_IEVENT, FEC_IMASK, FEC_R_DES_ACTIVE_0, FEC_X_DES_ACTIVE_0,
FEC_ECNTRL, FEC_MII_DATA, FEC_MII_SPEED, FEC_MIB_CTRLSTAT, FEC_R_CNTRL,
FEC_X_CNTRL, FEC_ADDR_LOW, FEC_ADDR_HIGH, FEC_OPD, FEC_TXIC0, FEC_TXIC1,
FEC_TXIC2, FEC_RXIC0, FEC_RXIC1, FEC_RXIC2, FEC_HASH_TABLE_HIGH,
FEC_HASH_TABLE_LOW, FEC_GRP_HASH_TABLE_HIGH, FEC_GRP_HASH_TABLE_LOW,
FEC_X_WMRK, FEC_R_BOUND, FEC_R_FSTART, FEC_R_DES_START_1,
FEC_X_DES_START_1, FEC_R_BUFF_SIZE_1, FEC_R_DES_START_2,
FEC_X_DES_START_2, FEC_R_BUFF_SIZE_2, FEC_R_DES_START_0,
FEC_X_DES_START_0, FEC_R_BUFF_SIZE_0, FEC_R_FIFO_RSFL, FEC_R_FIFO_RSEM,
FEC_R_FIFO_RAEM, FEC_R_FIFO_RAFL, FEC_RACC, FEC_RCMR_1, FEC_RCMR_2,
FEC_DMA_CFG_1, FEC_DMA_CFG_2, FEC_R_DES_ACTIVE_1, FEC_X_DES_ACTIVE_1,
FEC_R_DES_ACTIVE_2, FEC_X_DES_ACTIVE_2, FEC_QOS_SCHEME,
RMON_T_DROP, RMON_T_PACKETS, RMON_T_BC_PKT, RMON_T_MC_PKT,
RMON_T_CRC_ALIGN, RMON_T_UNDERSIZE, RMON_T_OVERSIZE, RMON_T_FRAG,
RMON_T_JAB, RMON_T_COL, RMON_T_P64, RMON_T_P65TO127, RMON_T_P128TO255,
RMON_T_P256TO511, RMON_T_P512TO1023, RMON_T_P1024TO2047,
RMON_T_P_GTE2048, RMON_T_OCTETS,
IEEE_T_DROP, IEEE_T_FRAME_OK, IEEE_T_1COL, IEEE_T_MCOL, IEEE_T_DEF,
IEEE_T_LCOL, IEEE_T_EXCOL, IEEE_T_MACERR, IEEE_T_CSERR, IEEE_T_SQE,
IEEE_T_FDXFC, IEEE_T_OCTETS_OK,
RMON_R_PACKETS, RMON_R_BC_PKT, RMON_R_MC_PKT, RMON_R_CRC_ALIGN,
RMON_R_UNDERSIZE, RMON_R_OVERSIZE, RMON_R_FRAG, RMON_R_JAB,
RMON_R_RESVD_O, RMON_R_P64, RMON_R_P65TO127, RMON_R_P128TO255,
RMON_R_P256TO511, RMON_R_P512TO1023, RMON_R_P1024TO2047,
RMON_R_P_GTE2048, RMON_R_OCTETS,
IEEE_R_DROP, IEEE_R_FRAME_OK, IEEE_R_CRC, IEEE_R_ALIGN, IEEE_R_MACERR,
IEEE_R_FDXFC, IEEE_R_OCTETS_OK
};
#else
static u32 fec_enet_register_offset[] = {
FEC_ECNTRL, FEC_IEVENT, FEC_IMASK, FEC_IVEC, FEC_R_DES_ACTIVE_0,
FEC_R_DES_ACTIVE_1, FEC_R_DES_ACTIVE_2, FEC_X_DES_ACTIVE_0,
FEC_X_DES_ACTIVE_1, FEC_X_DES_ACTIVE_2, FEC_MII_DATA, FEC_MII_SPEED,
FEC_R_BOUND, FEC_R_FSTART, FEC_X_WMRK, FEC_X_FSTART, FEC_R_CNTRL,
FEC_MAX_FRM_LEN, FEC_X_CNTRL, FEC_ADDR_LOW, FEC_ADDR_HIGH,
FEC_GRP_HASH_TABLE_HIGH, FEC_GRP_HASH_TABLE_LOW, FEC_R_DES_START_0,
FEC_R_DES_START_1, FEC_R_DES_START_2, FEC_X_DES_START_0,
FEC_X_DES_START_1, FEC_X_DES_START_2, FEC_R_BUFF_SIZE_0,
FEC_R_BUFF_SIZE_1, FEC_R_BUFF_SIZE_2
};
#endif
static void fec_enet_get_regs(struct net_device *ndev,
struct ethtool_regs *regs, void *regbuf)
{
struct fec_enet_private *fep = netdev_priv(ndev);
u32 __iomem *theregs = (u32 __iomem *)fep->hwp;
u32 *buf = (u32 *)regbuf;
u32 i, off;
memset(buf, 0, regs->len);
for (i = 0; i < ARRAY_SIZE(fec_enet_register_offset); i++) {
off = fec_enet_register_offset[i] / 4;
buf[off] = readl(&theregs[off]);
}
}
static int fec_enet_get_ts_info(struct net_device *ndev,
struct ethtool_ts_info *info)
{
struct fec_enet_private *fep = netdev_priv(ndev);
if (fep->bufdesc_ex) {
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;
if (fep->ptp_clock)
info->phc_index = ptp_clock_index(fep->ptp_clock);
else
info->phc_index = -1;
info->tx_types = (1 << HWTSTAMP_TX_OFF) |
(1 << HWTSTAMP_TX_ON);
info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
(1 << HWTSTAMP_FILTER_ALL);
return 0;
} else {
return ethtool_op_get_ts_info(ndev, info);
}
}
#if !defined(CONFIG_M5272)
static void fec_enet_get_pauseparam(struct net_device *ndev,
struct ethtool_pauseparam *pause)
{
struct fec_enet_private *fep = netdev_priv(ndev);
pause->autoneg = (fep->pause_flag & FEC_PAUSE_FLAG_AUTONEG) != 0;
pause->tx_pause = (fep->pause_flag & FEC_PAUSE_FLAG_ENABLE) != 0;
pause->rx_pause = pause->tx_pause;
}
static int fec_enet_set_pauseparam(struct net_device *ndev,
struct ethtool_pauseparam *pause)
{
struct fec_enet_private *fep = netdev_priv(ndev);
if (!fep->phy_dev)
return -ENODEV;
if (pause->tx_pause != pause->rx_pause) {
netdev_info(ndev,
"hardware only support enable/disable both tx and rx");
return -EINVAL;
}
fep->pause_flag = 0;
/* tx pause must be same as rx pause */
fep->pause_flag |= pause->rx_pause ? FEC_PAUSE_FLAG_ENABLE : 0;
fep->pause_flag |= pause->autoneg ? FEC_PAUSE_FLAG_AUTONEG : 0;
if (pause->rx_pause || pause->autoneg) {
fep->phy_dev->supported |= ADVERTISED_Pause;
fep->phy_dev->advertising |= ADVERTISED_Pause;
} else {
fep->phy_dev->supported &= ~ADVERTISED_Pause;
fep->phy_dev->advertising &= ~ADVERTISED_Pause;
}
if (pause->autoneg) {
if (netif_running(ndev))
fec_stop(ndev);
phy_start_aneg(fep->phy_dev);
}
if (netif_running(ndev)) {
napi_disable(&fep->napi);
netif_tx_lock_bh(ndev);
fec_restart(ndev);
netif_wake_queue(ndev);
netif_tx_unlock_bh(ndev);
napi_enable(&fep->napi);
}
return 0;
}
static const struct fec_stat {
char name[ETH_GSTRING_LEN];
u16 offset;
} fec_stats[] = {
/* RMON TX */
{ "tx_dropped", RMON_T_DROP },
{ "tx_packets", RMON_T_PACKETS },
{ "tx_broadcast", RMON_T_BC_PKT },
{ "tx_multicast", RMON_T_MC_PKT },
{ "tx_crc_errors", RMON_T_CRC_ALIGN },
{ "tx_undersize", RMON_T_UNDERSIZE },
{ "tx_oversize", RMON_T_OVERSIZE },
{ "tx_fragment", RMON_T_FRAG },
{ "tx_jabber", RMON_T_JAB },
{ "tx_collision", RMON_T_COL },
{ "tx_64byte", RMON_T_P64 },
{ "tx_65to127byte", RMON_T_P65TO127 },
{ "tx_128to255byte", RMON_T_P128TO255 },
{ "tx_256to511byte", RMON_T_P256TO511 },
{ "tx_512to1023byte", RMON_T_P512TO1023 },
{ "tx_1024to2047byte", RMON_T_P1024TO2047 },
{ "tx_GTE2048byte", RMON_T_P_GTE2048 },
{ "tx_octets", RMON_T_OCTETS },
/* IEEE TX */
{ "IEEE_tx_drop", IEEE_T_DROP },
{ "IEEE_tx_frame_ok", IEEE_T_FRAME_OK },
{ "IEEE_tx_1col", IEEE_T_1COL },
{ "IEEE_tx_mcol", IEEE_T_MCOL },
{ "IEEE_tx_def", IEEE_T_DEF },
{ "IEEE_tx_lcol", IEEE_T_LCOL },
{ "IEEE_tx_excol", IEEE_T_EXCOL },
{ "IEEE_tx_macerr", IEEE_T_MACERR },
{ "IEEE_tx_cserr", IEEE_T_CSERR },
{ "IEEE_tx_sqe", IEEE_T_SQE },
{ "IEEE_tx_fdxfc", IEEE_T_FDXFC },
{ "IEEE_tx_octets_ok", IEEE_T_OCTETS_OK },
/* RMON RX */
{ "rx_packets", RMON_R_PACKETS },
{ "rx_broadcast", RMON_R_BC_PKT },
{ "rx_multicast", RMON_R_MC_PKT },
{ "rx_crc_errors", RMON_R_CRC_ALIGN },
{ "rx_undersize", RMON_R_UNDERSIZE },
{ "rx_oversize", RMON_R_OVERSIZE },
{ "rx_fragment", RMON_R_FRAG },
{ "rx_jabber", RMON_R_JAB },
{ "rx_64byte", RMON_R_P64 },
{ "rx_65to127byte", RMON_R_P65TO127 },
{ "rx_128to255byte", RMON_R_P128TO255 },
{ "rx_256to511byte", RMON_R_P256TO511 },
{ "rx_512to1023byte", RMON_R_P512TO1023 },
{ "rx_1024to2047byte", RMON_R_P1024TO2047 },
{ "rx_GTE2048byte", RMON_R_P_GTE2048 },
{ "rx_octets", RMON_R_OCTETS },
/* IEEE RX */
{ "IEEE_rx_drop", IEEE_R_DROP },
{ "IEEE_rx_frame_ok", IEEE_R_FRAME_OK },
{ "IEEE_rx_crc", IEEE_R_CRC },
{ "IEEE_rx_align", IEEE_R_ALIGN },
{ "IEEE_rx_macerr", IEEE_R_MACERR },
{ "IEEE_rx_fdxfc", IEEE_R_FDXFC },
{ "IEEE_rx_octets_ok", IEEE_R_OCTETS_OK },
};
static void fec_enet_get_ethtool_stats(struct net_device *dev,
struct ethtool_stats *stats, u64 *data)
{
struct fec_enet_private *fep = netdev_priv(dev);
int i;
for (i = 0; i < ARRAY_SIZE(fec_stats); i++)
data[i] = readl(fep->hwp + fec_stats[i].offset);
}
static void fec_enet_get_strings(struct net_device *netdev,
u32 stringset, u8 *data)
{
int i;
switch (stringset) {
case ETH_SS_STATS:
for (i = 0; i < ARRAY_SIZE(fec_stats); i++)
memcpy(data + i * ETH_GSTRING_LEN,
fec_stats[i].name, ETH_GSTRING_LEN);
break;
}
}
static int fec_enet_get_sset_count(struct net_device *dev, int sset)
{
switch (sset) {
case ETH_SS_STATS:
return ARRAY_SIZE(fec_stats);
default:
return -EOPNOTSUPP;
}
}
#endif /* !defined(CONFIG_M5272) */
static int fec_enet_nway_reset(struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
struct phy_device *phydev = fep->phy_dev;
if (!phydev)
return -ENODEV;
return genphy_restart_aneg(phydev);
}
/* ITR clock source is enet system clock (clk_ahb).
* TCTT unit is cycle_ns * 64 cycle
* So, the ICTT value = X us / (cycle_ns * 64)
*/
static int fec_enet_us_to_itr_clock(struct net_device *ndev, int us)
{
struct fec_enet_private *fep = netdev_priv(ndev);
return us * (fep->itr_clk_rate / 64000) / 1000;
}
/* Set threshold for interrupt coalescing */
static void fec_enet_itr_coal_set(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int rx_itr, tx_itr;
if (!(fep->quirks & FEC_QUIRK_HAS_AVB))
return;
/* Must be greater than zero to avoid unpredictable behavior */
if (!fep->rx_time_itr || !fep->rx_pkts_itr ||
!fep->tx_time_itr || !fep->tx_pkts_itr)
return;
/* Select enet system clock as Interrupt Coalescing
* timer Clock Source
*/
rx_itr = FEC_ITR_CLK_SEL;
tx_itr = FEC_ITR_CLK_SEL;
/* set ICFT and ICTT */
rx_itr |= FEC_ITR_ICFT(fep->rx_pkts_itr);
rx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr));
tx_itr |= FEC_ITR_ICFT(fep->tx_pkts_itr);
tx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr));
rx_itr |= FEC_ITR_EN;
tx_itr |= FEC_ITR_EN;
writel(tx_itr, fep->hwp + FEC_TXIC0);
writel(rx_itr, fep->hwp + FEC_RXIC0);
writel(tx_itr, fep->hwp + FEC_TXIC1);
writel(rx_itr, fep->hwp + FEC_RXIC1);
writel(tx_itr, fep->hwp + FEC_TXIC2);
writel(rx_itr, fep->hwp + FEC_RXIC2);
}
static int
fec_enet_get_coalesce(struct net_device *ndev, struct ethtool_coalesce *ec)
{
struct fec_enet_private *fep = netdev_priv(ndev);
if (!(fep->quirks & FEC_QUIRK_HAS_AVB))
return -EOPNOTSUPP;
ec->rx_coalesce_usecs = fep->rx_time_itr;
ec->rx_max_coalesced_frames = fep->rx_pkts_itr;
ec->tx_coalesce_usecs = fep->tx_time_itr;
ec->tx_max_coalesced_frames = fep->tx_pkts_itr;
return 0;
}
static int
fec_enet_set_coalesce(struct net_device *ndev, struct ethtool_coalesce *ec)
{
struct fec_enet_private *fep = netdev_priv(ndev);
unsigned int cycle;
if (!(fep->quirks & FEC_QUIRK_HAS_AVB))
return -EOPNOTSUPP;
if (ec->rx_max_coalesced_frames > 255) {
pr_err("Rx coalesced frames exceed hardware limiation");
return -EINVAL;
}
if (ec->tx_max_coalesced_frames > 255) {
pr_err("Tx coalesced frame exceed hardware limiation");
return -EINVAL;
}
cycle = fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr);
if (cycle > 0xFFFF) {
pr_err("Rx coalesed usec exceeed hardware limiation");
return -EINVAL;
}
cycle = fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr);
if (cycle > 0xFFFF) {
pr_err("Rx coalesed usec exceeed hardware limiation");
return -EINVAL;
}
fep->rx_time_itr = ec->rx_coalesce_usecs;
fep->rx_pkts_itr = ec->rx_max_coalesced_frames;
fep->tx_time_itr = ec->tx_coalesce_usecs;
fep->tx_pkts_itr = ec->tx_max_coalesced_frames;
fec_enet_itr_coal_set(ndev);
return 0;
}
static void fec_enet_itr_coal_init(struct net_device *ndev)
{
struct ethtool_coalesce ec;
ec.rx_coalesce_usecs = FEC_ITR_ICTT_DEFAULT;
ec.rx_max_coalesced_frames = FEC_ITR_ICFT_DEFAULT;
ec.tx_coalesce_usecs = FEC_ITR_ICTT_DEFAULT;
ec.tx_max_coalesced_frames = FEC_ITR_ICFT_DEFAULT;
fec_enet_set_coalesce(ndev, &ec);
}
static int fec_enet_get_tunable(struct net_device *netdev,
const struct ethtool_tunable *tuna,
void *data)
{
struct fec_enet_private *fep = netdev_priv(netdev);
int ret = 0;
switch (tuna->id) {
case ETHTOOL_RX_COPYBREAK:
*(u32 *)data = fep->rx_copybreak;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int fec_enet_set_tunable(struct net_device *netdev,
const struct ethtool_tunable *tuna,
const void *data)
{
struct fec_enet_private *fep = netdev_priv(netdev);
int ret = 0;
switch (tuna->id) {
case ETHTOOL_RX_COPYBREAK:
fep->rx_copybreak = *(u32 *)data;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static void
fec_enet_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
{
struct fec_enet_private *fep = netdev_priv(ndev);
if (fep->wol_flag & FEC_WOL_HAS_MAGIC_PACKET) {
wol->supported = WAKE_MAGIC;
wol->wolopts = fep->wol_flag & FEC_WOL_FLAG_ENABLE ? WAKE_MAGIC : 0;
} else {
wol->supported = wol->wolopts = 0;
}
}
static int
fec_enet_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
{
struct fec_enet_private *fep = netdev_priv(ndev);
if (!(fep->wol_flag & FEC_WOL_HAS_MAGIC_PACKET))
return -EINVAL;
if (wol->wolopts & ~WAKE_MAGIC)
return -EINVAL;
device_set_wakeup_enable(&ndev->dev, wol->wolopts & WAKE_MAGIC);
if (device_may_wakeup(&ndev->dev)) {
fep->wol_flag |= FEC_WOL_FLAG_ENABLE;
if (fep->irq[0] > 0)
enable_irq_wake(fep->irq[0]);
} else {
fep->wol_flag &= (~FEC_WOL_FLAG_ENABLE);
if (fep->irq[0] > 0)
disable_irq_wake(fep->irq[0]);
}
return 0;
}
static const struct ethtool_ops fec_enet_ethtool_ops = {
.get_settings = fec_enet_get_settings,
.set_settings = fec_enet_set_settings,
.get_drvinfo = fec_enet_get_drvinfo,
.get_regs_len = fec_enet_get_regs_len,
.get_regs = fec_enet_get_regs,
.nway_reset = fec_enet_nway_reset,
.get_link = ethtool_op_get_link,
.get_coalesce = fec_enet_get_coalesce,
.set_coalesce = fec_enet_set_coalesce,
#ifndef CONFIG_M5272
.get_pauseparam = fec_enet_get_pauseparam,
.set_pauseparam = fec_enet_set_pauseparam,
.get_strings = fec_enet_get_strings,
.get_ethtool_stats = fec_enet_get_ethtool_stats,
.get_sset_count = fec_enet_get_sset_count,
#endif
.get_ts_info = fec_enet_get_ts_info,
.get_tunable = fec_enet_get_tunable,
.set_tunable = fec_enet_set_tunable,
.get_wol = fec_enet_get_wol,
.set_wol = fec_enet_set_wol,
};
static int fec_enet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct phy_device *phydev = fep->phy_dev;
if (!netif_running(ndev))
return -EINVAL;
if (!phydev)
return -ENODEV;
if (fep->bufdesc_ex) {
if (cmd == SIOCSHWTSTAMP)
return fec_ptp_set(ndev, rq);
if (cmd == SIOCGHWTSTAMP)
return fec_ptp_get(ndev, rq);
}
return phy_mii_ioctl(phydev, rq, cmd);
}
static void fec_enet_free_buffers(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
unsigned int i;
struct sk_buff *skb;
struct bufdesc *bdp;
struct fec_enet_priv_tx_q *txq;
struct fec_enet_priv_rx_q *rxq;
unsigned int q;
for (q = 0; q < fep->num_rx_queues; q++) {
rxq = fep->rx_queue[q];
bdp = rxq->rx_bd_base;
for (i = 0; i < rxq->rx_ring_size; i++) {
skb = rxq->rx_skbuff[i];
rxq->rx_skbuff[i] = NULL;
if (skb) {
dma_unmap_single(&fep->pdev->dev,
fec32_to_cpu(bdp->cbd_bufaddr),
FEC_ENET_RX_FRSIZE - fep->rx_align,
DMA_FROM_DEVICE);
dev_kfree_skb(skb);
}
bdp = fec_enet_get_nextdesc(bdp, fep, q);
}
}
for (q = 0; q < fep->num_tx_queues; q++) {
txq = fep->tx_queue[q];
bdp = txq->tx_bd_base;
for (i = 0; i < txq->tx_ring_size; i++) {
kfree(txq->tx_bounce[i]);
txq->tx_bounce[i] = NULL;
skb = txq->tx_skbuff[i];
txq->tx_skbuff[i] = NULL;
dev_kfree_skb(skb);
}
}
}