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android-kvm / linux / 391e5975c0208ce3739587b33eba08be3e473d79 / . / drivers / net / ethernet / freescale / fec_main.c
blob: 1b1f7f2a61306e78d4dcfc07f1502dfda5b5de43 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* 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/selftests.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/crc32.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 <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <soc/imx/cpuidle.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"
static const u16 fec_enet_vlan_pri_to_queue[8] = {0, 0, 1, 1, 1, 2, 2, 2};
/* 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 */
struct fec_devinfo {
u32 quirks;
};
static const struct fec_devinfo fec_imx25_info = {
.quirks = FEC_QUIRK_USE_GASKET | FEC_QUIRK_MIB_CLEAR |
FEC_QUIRK_HAS_FRREG,
};
static const struct fec_devinfo fec_imx27_info = {
.quirks = FEC_QUIRK_MIB_CLEAR | FEC_QUIRK_HAS_FRREG,
};
static const struct fec_devinfo fec_imx28_info = {
.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME |
FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC |
FEC_QUIRK_HAS_FRREG | FEC_QUIRK_CLEAR_SETUP_MII |
FEC_QUIRK_NO_HARD_RESET,
};
static const struct fec_devinfo fec_imx6q_info = {
.quirks = 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 | FEC_QUIRK_CLEAR_SETUP_MII,
};
static const struct fec_devinfo fec_mvf600_info = {
.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_RACC,
};
static const struct fec_devinfo fec_imx6x_info = {
.quirks = 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 | FEC_QUIRK_HAS_COALESCE |
FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES,
};
static const struct fec_devinfo fec_imx6ul_info = {
.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR007885 |
FEC_QUIRK_BUG_CAPTURE | FEC_QUIRK_HAS_RACC |
FEC_QUIRK_HAS_COALESCE | FEC_QUIRK_CLEAR_SETUP_MII,
};
static const struct fec_devinfo fec_imx8mq_info = {
.quirks = 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 | FEC_QUIRK_HAS_COALESCE |
FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES |
FEC_QUIRK_HAS_EEE | FEC_QUIRK_WAKEUP_FROM_INT2,
};
static const struct fec_devinfo fec_imx8qm_info = {
.quirks = 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 | FEC_QUIRK_HAS_COALESCE |
FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES |
FEC_QUIRK_DELAYED_CLKS_SUPPORT,
};
static struct platform_device_id fec_devtype[] = {
{
/* keep it for coldfire */
.name = DRIVER_NAME,
.driver_data = 0,
}, {
.name = "imx25-fec",
.driver_data = (kernel_ulong_t)&fec_imx25_info,
}, {
.name = "imx27-fec",
.driver_data = (kernel_ulong_t)&fec_imx27_info,
}, {
.name = "imx28-fec",
.driver_data = (kernel_ulong_t)&fec_imx28_info,
}, {
.name = "imx6q-fec",
.driver_data = (kernel_ulong_t)&fec_imx6q_info,
}, {
.name = "mvf600-fec",
.driver_data = (kernel_ulong_t)&fec_mvf600_info,
}, {
.name = "imx6sx-fec",
.driver_data = (kernel_ulong_t)&fec_imx6x_info,
}, {
.name = "imx6ul-fec",
.driver_data = (kernel_ulong_t)&fec_imx6ul_info,
}, {
.name = "imx8mq-fec",
.driver_data = (kernel_ulong_t)&fec_imx8mq_info,
}, {
.name = "imx8qm-fec",
.driver_data = (kernel_ulong_t)&fec_imx8qm_info,
}, {
/* 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,
IMX6UL_FEC,
IMX8MQ_FEC,
IMX8QM_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], },
{ .compatible = "fsl,imx6ul-fec", .data = &fec_devtype[IMX6UL_FEC], },
{ .compatible = "fsl,imx8mq-fec", .data = &fec_devtype[IMX8MQ_FEC], },
{ .compatible = "fsl,imx8qm-fec", .data = &fec_devtype[IMX8QM_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.
*
* 2048 byte skbufs are allocated. However, alignment requirements
* varies between FEC variants. Worst case is 64, so round down by 64.
*/
#define PKT_MAXBUF_SIZE (round_down(2048 - 64, 64))
#define PKT_MINBUF_SIZE 64
/* FEC receive acceleration */
#define FEC_RACC_IPDIS (1 << 1)
#define FEC_RACC_PRODIS (1 << 2)
#define FEC_RACC_SHIFT16 BIT(7)
#define FEC_RACC_OPTIONS (FEC_RACC_IPDIS | FEC_RACC_PRODIS)
/* MIB Control Register */
#define FEC_MIB_CTRLSTAT_DISABLE BIT(31)
/*
* 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) || \
defined(CONFIG_ARM64)
#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_ST_C45 (0)
#define FEC_MMFR_OP_READ (2 << 28)
#define FEC_MMFR_OP_READ_C45 (3 << 28)
#define FEC_MMFR_OP_WRITE (1 << 28)
#define FEC_MMFR_OP_ADDR_WRITE (0)
#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
/* 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->bd.ring_size * TSO_HEADER_SIZE))
static int mii_cnt;
static struct bufdesc *fec_enet_get_nextdesc(struct bufdesc *bdp,
struct bufdesc_prop *bd)
{
return (bdp >= bd->last) ? bd->base
: (struct bufdesc *)(((void *)bdp) + bd->dsize);
}
static struct bufdesc *fec_enet_get_prevdesc(struct bufdesc *bdp,
struct bufdesc_prop *bd)
{
return (bdp <= bd->base) ? bd->last
: (struct bufdesc *)(((void *)bdp) - bd->dsize);
}
static int fec_enet_get_bd_index(struct bufdesc *bdp,
struct bufdesc_prop *bd)
{
return ((const char *)bdp - (const char *)bd->base) >> bd->dsize_log2;
}
static int fec_enet_get_free_txdesc_num(struct fec_enet_priv_tx_q *txq)
{
int entries;
entries = (((const char *)txq->dirty_tx -
(const char *)txq->bd.cur) >> txq->bd.dsize_log2) - 1;
return entries >= 0 ? entries : entries + txq->bd.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->bd.base;
do {
pr_info("%3u %c%c 0x%04x 0x%08x %4u %p\n",
index,
bdp == txq->bd.cur ? '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, &txq->bd);
index++;
} while (bdp != txq->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->bd.cur;
struct bufdesc_ex *ebdp;
int nr_frags = skb_shinfo(skb)->nr_frags;
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, &txq->bd);
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_frag_size(&skb_shinfo(skb)->frags[frag]);
/* 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(txq->bd.qid);
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 = skb_frag_address(this_frag);
index = fec_enet_get_bd_index(bdp, &txq->bd);
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)) {
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);
/* Make sure the updates to rest of the descriptor are
* performed before transferring ownership.
*/
wmb();
bdp->cbd_sc = cpu_to_fec16(status);
}
return bdp;
dma_mapping_error:
bdp = txq->bd.cur;
for (i = 0; i < frag; i++) {
bdp = fec_enet_get_nextdesc(bdp, &txq->bd);
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 int estatus = 0;
unsigned int index;
int entries_free;
entries_free = fec_enet_get_free_txdesc_num(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->bd.cur;
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);
index = fec_enet_get_bd_index(bdp, &txq->bd);
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)) {
dma_unmap_single(&fep->pdev->dev, addr,
buflen, DMA_TO_DEVICE);
dev_kfree_skb_any(skb);
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;
}
}
bdp->cbd_bufaddr = cpu_to_fec32(addr);
bdp->cbd_datlen = cpu_to_fec16(buflen);
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(txq->bd.qid);
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(last_bdp, &txq->bd);
/* Save skb pointer */
txq->tx_skbuff[index] = skb;
/* Make sure the updates to rest of the descriptor are performed before
* transferring ownership.
*/
wmb();
/* 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, &txq->bd);
skb_tx_timestamp(skb);
/* Make sure the update to bdp and tx_skbuff are performed before
* txq->bd.cur.
*/
wmb();
txq->bd.cur = bdp;
/* Trigger transmission start */
writel(0, txq->bd.reg_desc_active);
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 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(txq->bd.qid);
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);
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(txq->bd.qid);
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, total_len, data_left;
struct bufdesc *bdp = txq->bd.cur;
struct tso_t tso;
unsigned int index = 0;
int ret;
if (tso_count_descs(skb) >= fec_enet_get_free_txdesc_num(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 */
hdr_len = tso_start(skb, &tso);
total_len = skb->len - hdr_len;
while (total_len > 0) {
char *hdr;
index = fec_enet_get_bd_index(bdp, &txq->bd);
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, &txq->bd);
index = fec_enet_get_bd_index(bdp, &txq->bd);
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, &txq->bd);
}
/* Save skb pointer */
txq->tx_skbuff[index] = skb;
skb_tx_timestamp(skb);
txq->bd.cur = bdp;
/* Trigger transmission start */
if (!(fep->quirks & FEC_QUIRK_ERR007885) ||
!readl(txq->bd.reg_desc_active) ||
!readl(txq->bd.reg_desc_active) ||
!readl(txq->bd.reg_desc_active) ||
!readl(txq->bd.reg_desc_active))
writel(0, txq->bd.reg_desc_active);
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(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->bd.base;
for (i = 0; i < rxq->bd.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, &rxq->bd);
}
/* Set the last buffer to wrap */
bdp = fec_enet_get_prevdesc(bdp, &rxq->bd);
bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP);
rxq->bd.cur = rxq->bd.base;
}
for (q = 0; q < fep->num_tx_queues; q++) {
/* ...and the same for transmit */
txq = fep->tx_queue[q];
bdp = txq->bd.base;
txq->bd.cur = bdp;
for (i = 0; i < txq->bd.ring_size; i++) {
/* Initialize the BD for every fragment in the page. */
bdp->cbd_sc = cpu_to_fec16(0);
if (bdp->cbd_bufaddr &&
!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);
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, &txq->bd);
}
/* Set the last buffer to wrap */
bdp = fec_enet_get_prevdesc(bdp, &txq->bd);
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->rx_queue[i]->bd.reg_desc_active);
}
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_MAXBUF_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->bd.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 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_MULTI_QUEUES ||
((fep->quirks & FEC_QUIRK_NO_HARD_RESET) && fep->link)) {
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.
*/
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, except MDIO. */
writel((0xffffffff & ~FEC_ENET_MII), 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) {
u32 val = readl(fep->hwp + FEC_RACC);
/* align IP header */
val |= FEC_RACC_SHIFT16;
if (fep->csum_flags & FLAG_RX_CSUM_ENABLED)
/* set RX checksum */
val |= FEC_RACC_OPTIONS;
else
val &= ~FEC_RACC_OPTIONS;
writel(val, fep->hwp + FEC_RACC);
writel(PKT_MAXBUF_SIZE, fep->hwp + FEC_FTRL);
}
#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 (ndev->phydev) {
if (ndev->phydev->speed == SPEED_1000)
ecntl |= (1 << 5);
else if (ndev->phydev->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 (ndev->phydev && ndev->phydev->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) &&
ndev->phydev && ndev->phydev->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);
if (fep->quirks & FEC_QUIRK_DELAYED_CLKS_SUPPORT &&
fep->rgmii_txc_dly)
ecntl |= FEC_ENET_TXC_DLY;
if (fep->quirks & FEC_QUIRK_DELAYED_CLKS_SUPPORT &&
fep->rgmii_rxc_dly)
ecntl |= FEC_ENET_RXC_DLY;
#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(0, fep->hwp + FEC_IMASK);
/* Init the interrupt coalescing */
fec_enet_itr_coal_init(ndev);
}
static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled)
{
struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
struct fec_stop_mode_gpr *stop_gpr = &fep->stop_gpr;
if (stop_gpr->gpr) {
if (enabled)
regmap_update_bits(stop_gpr->gpr, stop_gpr->reg,
BIT(stop_gpr->bit),
BIT(stop_gpr->bit));
else
regmap_update_bits(stop_gpr->gpr, stop_gpr->reg,
BIT(stop_gpr->bit), 0);
} else if (pdata && pdata->sleep_mode_enable) {
pdata->sleep_mode_enable(enabled);
}
}
static void
fec_stop(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
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_MULTI_QUEUES) {
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);
fec_enet_stop_mode(fep, 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, unsigned int txqueue)
{
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_tx_wake_all_queues(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);
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, &txq->bd);
while (bdp != READ_ONCE(txq->bd.cur)) {
/* Order the load of bd.cur 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(bdp, &txq->bd);
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)
goto skb_done;
/* 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;
}
/* NOTE: SKBTX_IN_PROGRESS being set does not imply it's we who
* are to time stamp the packet, so we still need to check time
* stamping enabled flag.
*/
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS &&
fep->hwts_tx_en) &&
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);
skb_done:
/* 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, &txq->bd);
/* Since we have freed up a buffer, the ring is no longer full
*/
if (netif_tx_queue_stopped(nq)) {
entries_free = fec_enet_get_free_txdesc_num(txq);
if (entries_free >= txq->tx_wake_threshold)
netif_tx_wake_queue(nq);
}
}
/* ERR006358: Keep the transmitter going */
if (bdp != txq->bd.cur &&
readl(txq->bd.reg_desc_active) == 0)
writel(0, txq->bd.reg_desc_active);
}
static void fec_enet_tx(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int i;
/* Make sure that AVB queues are processed first. */
for (i = fep->num_tx_queues - 1; i >= 0; i--)
fec_enet_tx_queue(ndev, i);
}
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 bd_rx.cur 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
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->bd.cur;
while (!((status = fec16_to_cpu(bdp->cbd_sc)) & BD_ENET_RX_EMPTY)) {
if (pkt_received >= budget)
break;
pkt_received++;
writel(FEC_ENET_RXF_GET(queue_id), fep->hwp + FEC_IEVENT);
/* Check for errors. */
status ^= BD_ENET_RX_LAST;
if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
BD_ENET_RX_CR | BD_ENET_RX_OV | BD_ENET_RX_LAST |
BD_ENET_RX_CL)) {
ndev->stats.rx_errors++;
if (status & BD_ENET_RX_OV) {
/* FIFO overrun */
ndev->stats.rx_fifo_errors++;
goto rx_processing_done;
}
if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH
| BD_ENET_RX_LAST)) {
/* Frame too long or too short. */
ndev->stats.rx_length_errors++;
if (status & BD_ENET_RX_LAST)
netdev_err(ndev, "rcv is not +last\n");
}
if (status & BD_ENET_RX_CR) /* CRC Error */
ndev->stats.rx_crc_errors++;
/* Report late collisions as a frame error. */
if (status & (BD_ENET_RX_NO | BD_ENET_RX_CL))
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(bdp, &rxq->bd);
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);
#if !defined(CONFIG_M5272)
if (fep->quirks & FEC_QUIRK_HAS_RACC)
data = skb_pull_inline(skb, 2);
#endif
/* 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);
skb_record_rx_queue(skb, queue_id);
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;
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;
}
/* Make sure the updates to rest of the descriptor are
* performed before transferring ownership.
*/
wmb();
bdp->cbd_sc = cpu_to_fec16(status);
/* Update BD pointer to next entry */
bdp = fec_enet_get_nextdesc(bdp, &rxq->bd);
/* 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, rxq->bd.reg_desc_active);
}
rxq->bd.cur = bdp;
return pkt_received;
}
static int fec_enet_rx(struct net_device *ndev, int budget)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int i, done = 0;
/* Make sure that AVB queues are processed first. */
for (i = fep->num_rx_queues - 1; i >= 0; i--)
done += fec_enet_rx_queue(ndev, budget - done, i);
return done;
}
static bool fec_enet_collect_events(struct fec_enet_private *fep)
{
uint int_events;
int_events = readl(fep->hwp + FEC_IEVENT);
/* Don't clear MDIO events, we poll for those */
int_events &= ~FEC_ENET_MII;
writel(int_events, fep->hwp + FEC_IEVENT);
return int_events != 0;
}
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);
irqreturn_t ret = IRQ_NONE;
if (fec_enet_collect_events(fep) && fep->link) {
ret = IRQ_HANDLED;
if (napi_schedule_prep(&fep->napi)) {
/* Disable interrupts */
writel(0, fep->hwp + FEC_IMASK);
__napi_schedule(&fep->napi);
}
}
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 done = 0;
do {
done += fec_enet_rx(ndev, budget - done);
fec_enet_tx(ndev);
} while ((done < budget) && fec_enet_collect_events(fep));
if (done < budget) {
napi_complete_done(napi, done);
writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
}
return done;
}
/* ------------------------------------------------------------------------- */
static int fec_get_mac(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
unsigned char *iap, tmpaddr[ETH_ALEN];
int ret;
/*
* 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) {
ret = of_get_mac_address(np, tmpaddr);
if (!ret)
iap = tmpaddr;
else if (ret == -EPROBE_DEFER)
return ret;
}
}
/*
* 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
struct fec_platform_data *pdata = dev_get_platdata(&fep->pdev->dev);
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 */
dev_err(&fep->pdev->dev, "Invalid MAC address: %pM\n", iap);
eth_hw_addr_random(ndev);
dev_info(&fep->pdev->dev, "Using random MAC address: %pM\n",
ndev->dev_addr);
return 0;
}
/* Adjust MAC if using macaddr */
eth_hw_addr_gen(ndev, iap, iap == macaddr ? fep->dev_id : 0);
return 0;
}
/* ------------------------------------------------------------------------- */
/*
* 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 = ndev->phydev;
int status_change = 0;
/*
* 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_tx_wake_all_queues(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_wait(struct fec_enet_private *fep)
{
uint ievent;
int ret;
ret = readl_poll_timeout_atomic(fep->hwp + FEC_IEVENT, ievent,
ievent & FEC_ENET_MII, 2, 30000);
if (!ret)
writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT);
return ret;
}
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;
int ret = 0, frame_start, frame_addr, frame_op;
bool is_c45 = !!(regnum & MII_ADDR_C45);
ret = pm_runtime_resume_and_get(dev);
if (ret < 0)
return ret;
if (is_c45) {
frame_start = FEC_MMFR_ST_C45;
/* write address */
frame_addr = (regnum >> 16);
writel(frame_start | FEC_MMFR_OP_ADDR_WRITE |
FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
FEC_MMFR_TA | (regnum & 0xFFFF),
fep->hwp + FEC_MII_DATA);
/* wait for end of transfer */
ret = fec_enet_mdio_wait(fep);
if (ret) {
netdev_err(fep->netdev, "MDIO address write timeout\n");
goto out;
}
frame_op = FEC_MMFR_OP_READ_C45;
} else {
/* C22 read */
frame_op = FEC_MMFR_OP_READ;
frame_start = FEC_MMFR_ST;
frame_addr = regnum;
}
/* start a read op */
writel(frame_start | frame_op |
FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
FEC_MMFR_TA, fep->hwp + FEC_MII_DATA);
/* wait for end of transfer */
ret = fec_enet_mdio_wait(fep);
if (ret) {
netdev_err(fep->netdev, "MDIO read timeout\n");
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;
int ret, frame_start, frame_addr;
bool is_c45 = !!(regnum & MII_ADDR_C45);
ret = pm_runtime_resume_and_get(dev);
if (ret < 0)
return ret;
if (is_c45) {
frame_start = FEC_MMFR_ST_C45;
/* write address */
frame_addr = (regnum >> 16);
writel(frame_start | FEC_MMFR_OP_ADDR_WRITE |
FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
FEC_MMFR_TA | (regnum & 0xFFFF),
fep->hwp + FEC_MII_DATA);
/* wait for end of transfer */
ret = fec_enet_mdio_wait(fep);
if (ret) {
netdev_err(fep->netdev, "MDIO address write timeout\n");
goto out;
}
} else {
/* C22 write */
frame_start = FEC_MMFR_ST;
frame_addr = regnum;
}
/* start a write op */
writel(frame_start | FEC_MMFR_OP_WRITE |
FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
FEC_MMFR_TA | FEC_MMFR_DATA(value),
fep->hwp + FEC_MII_DATA);
/* wait for end of transfer */
ret = fec_enet_mdio_wait(fep);
if (ret)
netdev_err(fep->netdev, "MDIO write timeout\n");
out:
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
return ret;
}
static void fec_enet_phy_reset_after_clk_enable(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct phy_device *phy_dev = ndev->phydev;
if (phy_dev) {
phy_reset_after_clk_enable(phy_dev);
} else if (fep->phy_node) {
/*
* If the PHY still is not bound to the MAC, but there is
* OF PHY node and a matching PHY device instance already,
* use the OF PHY node to obtain the PHY device instance,
* and then use that PHY device instance when triggering
* the PHY reset.
*/
phy_dev = of_phy_find_device(fep->phy_node);
phy_reset_after_clk_enable(phy_dev);
put_device(&phy_dev->mdio.dev);
}
}
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_enet_out);
if (ret)
return ret;
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);
}
ret = clk_prepare_enable(fep->clk_ref);
if (ret)
goto failed_clk_ref;
ret = clk_prepare_enable(fep->clk_2x_txclk);
if (ret)
goto failed_clk_2x_txclk;
fec_enet_phy_reset_after_clk_enable(ndev);
} else {
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);
}
clk_disable_unprepare(fep->clk_ref);
clk_disable_unprepare(fep->clk_2x_txclk);
}
return 0;
failed_clk_2x_txclk:
if (fep->clk_ref)
clk_disable_unprepare(fep->clk_ref);
failed_clk_ref:
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);
}
failed_clk_ptp:
clk_disable_unprepare(fep->clk_enet_out);
return ret;
}
static int fec_enet_parse_rgmii_delay(struct fec_enet_private *fep,
struct device_node *np)
{
u32 rgmii_tx_delay, rgmii_rx_delay;
/* For rgmii tx internal delay, valid values are 0ps and 2000ps */
if (!of_property_read_u32(np, "tx-internal-delay-ps", &rgmii_tx_delay)) {
if (rgmii_tx_delay != 0 && rgmii_tx_delay != 2000) {
dev_err(&fep->pdev->dev, "The only allowed RGMII TX delay values are: 0ps, 2000ps");
return -EINVAL;
} else if (rgmii_tx_delay == 2000) {
fep->rgmii_txc_dly = true;
}
}
/* For rgmii rx internal delay, valid values are 0ps and 2000ps */
if (!of_property_read_u32(np, "rx-internal-delay-ps", &rgmii_rx_delay)) {
if (rgmii_rx_delay != 0 && rgmii_rx_delay != 2000) {
dev_err(&fep->pdev->dev, "The only allowed RGMII RX delay values are: 0ps, 2000ps");
return -EINVAL;
} else if (rgmii_rx_delay == 2000) {
fep->rgmii_rxc_dly = true;
}
}
return 0;
}
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;
if (fep->phy_node) {
phy_dev = of_phy_connect(ndev, fep->phy_node,
&fec_enet_adjust_link, 0,
fep->phy_interface);
if (!phy_dev) {
netdev_err(ndev, "Unable to connect to phy\n");
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_set_max_speed(phy_dev, 1000);
phy_remove_link_mode(phy_dev,
ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
#if !defined(CONFIG_M5272)
phy_support_sym_pause(phy_dev);
#endif
}
else
phy_set_max_speed(phy_dev, 100);
fep->link = 0;
fep->full_duplex = 0;
phy_dev->mac_managed_pm = 1;
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);
bool suppress_preamble = false;
struct device_node *node;
int err = -ENXIO;
u32 mii_speed, holdtime;
u32 bus_freq;
/*
* 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;
}
bus_freq = 2500000; /* 2.5MHz by default */
node = of_get_child_by_name(pdev->dev.of_node, "mdio");
if (node) {
of_property_read_u32(node, "clock-frequency", &bus_freq);
suppress_preamble = of_property_read_bool(node,
"suppress-preamble");
}
/*
* Set MII speed (= 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), bus_freq * 2);
if (fep->quirks & FEC_QUIRK_ENET_MAC)
mii_speed--;
if (mii_speed > 63) {
dev_err(&pdev->dev,
"fec clock (%lu) too 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;
if (suppress_preamble)
fep->phy_speed |= BIT(7);
if (fep->quirks & FEC_QUIRK_CLEAR_SETUP_MII) {
/* Clear MMFR to avoid to generate MII event by writing MSCR.
* MII event generation condition:
* - writing MSCR:
* - mmfr[31:0]_not_zero & mscr[7:0]_is_zero &
* mscr_reg_data_in[7:0] != 0
* - writing MMFR:
* - mscr[7:0]_not_zero
*/
writel(0, fep->hwp + FEC_MII_DATA);
}
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
/* Clear any pending transaction complete indication */
writel(FEC_ENET_MII, fep->hwp + FEC_IEVENT);
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;
err = of_mdiobus_register(fep->mii_bus, node);
if (err)
goto err_out_free_mdiobus;
of_node_put(node);
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:
of_node_put(node);
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 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->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) || \
defined(CONFIG_ARM64) || defined(CONFIG_COMPILE_TEST)
static __u32 fec_enet_register_version = 2;
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_version = 1;
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;
struct device *dev = &fep->pdev->dev;
u32 *buf = (u32 *)regbuf;
u32 i, off;
int ret;
ret = pm_runtime_resume_and_get(dev);
if (ret < 0)
return;
regs->version = fec_enet_register_version;
memset(buf, 0, regs->len);
for (i = 0; i < ARRAY_SIZE(fec_enet_register_offset); i++) {
off = fec_enet_register_offset[i];
if ((off == FEC_R_BOUND || off == FEC_R_FSTART) &&
!(fep->quirks & FEC_QUIRK_HAS_FRREG))
continue;
off >>= 2;
buf[off] = readl(&theregs[off]);
}
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
}
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 (!ndev->phydev)
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;
phy_set_sym_pause(ndev->phydev, pause->rx_pause, pause->tx_pause,
pause->autoneg);
if (pause->autoneg) {
if (netif_running(ndev))
fec_stop(ndev);
phy_start_aneg(ndev->phydev);
}
if (netif_running(ndev)) {
napi_disable(&fep->napi);
netif_tx_lock_bh(ndev);
fec_restart(ndev);
netif_tx_wake_all_queues(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 },
};
#define FEC_STATS_SIZE (ARRAY_SIZE(fec_stats) * sizeof(u64))
static void fec_enet_update_ethtool_stats(struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
int i;
for (i = 0; i < ARRAY_SIZE(fec_stats); i++)
fep->ethtool_stats[i] = readl(fep->hwp + fec_stats[i].offset);
}
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);
if (netif_running(dev))
fec_enet_update_ethtool_stats(dev);
memcpy(data, fep->ethtool_stats, FEC_STATS_SIZE);
}
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;
case ETH_SS_TEST:
net_selftest_get_strings(data);
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);
case ETH_SS_TEST:
return net_selftest_get_count();
default:
return -EOPNOTSUPP;
}
}
static void fec_enet_clear_ethtool_stats(struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
int i;
/* Disable MIB statistics counters */
writel(FEC_MIB_CTRLSTAT_DISABLE, fep->hwp + FEC_MIB_CTRLSTAT);
for (i = 0; i < ARRAY_SIZE(fec_stats); i++)
writel(0, fep->hwp + fec_stats[i].offset);
/* Don't disable MIB statistics counters */
writel(0, fep->hwp + FEC_MIB_CTRLSTAT);
}
#else /* !defined(CONFIG_M5272) */
#define FEC_STATS_SIZE 0
static inline void fec_enet_update_ethtool_stats(struct net_device *dev)
{
}
static inline void fec_enet_clear_ethtool_stats(struct net_device *dev)
{
}
#endif /* !defined(CONFIG_M5272) */
/* 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;
/* 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);
if (fep->quirks & FEC_QUIRK_HAS_MULTI_QUEUES) {
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 kernel_ethtool_coalesce *kernel_coal,
struct netlink_ext_ack *extack)
{
struct fec_enet_private *fep = netdev_priv(ndev);
if (!(fep->quirks & FEC_QUIRK_HAS_COALESCE))
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 kernel_ethtool_coalesce *kernel_coal,
struct netlink_ext_ack *extack)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct device *dev = &fep->pdev->dev;
unsigned int cycle;
if (!(fep->quirks & FEC_QUIRK_HAS_COALESCE))
return -EOPNOTSUPP;
if (ec->rx_max_coalesced_frames > 255) {
dev_err(dev, "Rx coalesced frames exceed hardware limitation\n");
return -EINVAL;
}
if (ec->tx_max_coalesced_frames > 255) {
dev_err(dev, "Tx coalesced frame exceed hardware limitation\n");
return -EINVAL;
}
cycle = fec_enet_us_to_itr_clock(ndev, ec->rx_coalesce_usecs);
if (cycle > 0xFFFF) {
dev_err(dev, "Rx coalesced usec exceed hardware limitation\n");
return -EINVAL;
}
cycle = fec_enet_us_to_itr_clock(ndev, ec->tx_coalesce_usecs);
if (cycle > 0xFFFF) {
dev_err(dev, "Tx coalesced usec exceed hardware limitation\n");
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, NULL, NULL);
}
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;
}
/* LPI Sleep Ts count base on tx clk (clk_ref).
* The lpi sleep cnt value = X us / (cycle_ns).
*/
static int fec_enet_us_to_tx_cycle(struct net_device *ndev, int us)
{
struct fec_enet_private *fep = netdev_priv(ndev);
return us * (fep->clk_ref_rate / 1000) / 1000;
}
static int fec_enet_eee_mode_set(struct net_device *ndev, bool enable)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct ethtool_eee *p = &fep->eee;
unsigned int sleep_cycle, wake_cycle;
int ret = 0;
if (enable) {
ret = phy_init_eee(ndev->phydev, 0);
if (ret)
return ret;
sleep_cycle = fec_enet_us_to_tx_cycle(ndev, p->tx_lpi_timer);
wake_cycle = sleep_cycle;
} else {
sleep_cycle = 0;
wake_cycle = 0;
}
p->tx_lpi_enabled = enable;
p->eee_enabled = enable;
p->eee_active = enable;
writel(sleep_cycle, fep->hwp + FEC_LPI_SLEEP);
writel(wake_cycle, fep->hwp + FEC_LPI_WAKE);
return 0;
}
static int
fec_enet_get_eee(struct net_device *ndev, struct ethtool_eee *edata)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct ethtool_eee *p = &fep->eee;
if (!(fep->quirks & FEC_QUIRK_HAS_EEE))
return -EOPNOTSUPP;
if (!netif_running(ndev))
return -ENETDOWN;
edata->eee_enabled = p->eee_enabled;
edata->eee_active = p->eee_active;
edata->tx_lpi_timer = p->tx_lpi_timer;
edata->tx_lpi_enabled = p->tx_lpi_enabled;
return phy_ethtool_get_eee(ndev->phydev, edata);
}
static int
fec_enet_set_eee(struct net_device *ndev, struct ethtool_eee *edata)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct ethtool_eee *p = &fep->eee;
int ret = 0;
if (!(fep->quirks & FEC_QUIRK_HAS_EEE))
return -EOPNOTSUPP;
if (!netif_running(ndev))
return -ENETDOWN;
p->tx_lpi_timer = edata->tx_lpi_timer;
if (!edata->eee_enabled || !edata->tx_lpi_enabled ||
!edata->tx_lpi_timer)
ret = fec_enet_eee_mode_set(ndev, false);
else
ret = fec_enet_eee_mode_set(ndev, true);
if (ret)
return ret;
return phy_ethtool_set_eee(ndev->phydev, edata);
}
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->wake_irq > 0)
enable_irq_wake(fep->wake_irq);
} else {
fep->wol_flag &= (~FEC_WOL_FLAG_ENABLE);
if (fep->wake_irq > 0)
disable_irq_wake(fep->wake_irq);
}
return 0;
}
static const struct ethtool_ops fec_enet_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
ETHTOOL_COALESCE_MAX_FRAMES,
.get_drvinfo = fec_enet_get_drvinfo,
.get_regs_len = fec_enet_get_regs_len,
.get_regs = fec_enet_get_regs,
.nway_reset = phy_ethtool_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,
.get_eee = fec_enet_get_eee,
.set_eee = fec_enet_set_eee,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
.self_test = net_selftest,
};
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 = ndev->phydev;
if (!netif_running(ndev))
return -EINVAL;
if (!phydev)
return -ENODEV;
if (fep->bufdesc_ex) {
bool use_fec_hwts = !phy_has_hwtstamp(phydev);
if (cmd == SIOCSHWTSTAMP) {
if (use_fec_hwts)
return fec_ptp_set(ndev, rq);
fec_ptp_disable_hwts(ndev);
} else if (cmd == SIOCGHWTSTAMP) {
if (use_fec_hwts)
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->bd.base;
for (i = 0; i < rxq->bd.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, &rxq->bd);
}
}
for (q = 0; q < fep->num_tx_queues; q++) {
txq = fep->tx_queue[q];
for (i = 0; i < txq->bd.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);
}
}
}
static void fec_enet_free_queue(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int i;
struct fec_enet_priv_tx_q *txq;
for (i = 0; i < fep->num_tx_queues; i++)
if (fep->tx_queue[i] && fep->tx_queue[i]->tso_hdrs) {
txq = fep->tx_queue[i];
dma_free_coherent(&fep->pdev->dev,
txq->bd.ring_size * TSO_HEADER_SIZE,
txq->tso_hdrs,
txq->tso_hdrs_dma);
}
for (i = 0; i < fep->num_rx_queues; i++)
kfree(fep->rx_queue[i]);
for (i = 0; i < fep->num_tx_queues; i++)
kfree(fep->tx_queue[i]);
}
static int fec_enet_alloc_queue(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int i;
int ret = 0;
struct fec_enet_priv_tx_q *txq;
for (i = 0; i < fep->num_tx_queues; i++) {
txq = kzalloc(sizeof(*txq), GFP_KERNEL);
if (!txq) {
ret = -ENOMEM;
goto alloc_failed;
}
fep->tx_queue[i] = txq;
txq->bd.ring_size = TX_RING_SIZE;
fep->total_tx_ring_size += fep->tx_queue[i]->bd.ring_size;
txq->tx_stop_threshold = FEC_MAX_SKB_DESCS;
txq->tx_wake_threshold =
(txq->bd.ring_size - txq->tx_stop_threshold) / 2;
txq->tso_hdrs = dma_alloc_coherent(&fep->pdev->dev,
txq->bd.ring_size * TSO_HEADER_SIZE,
&txq->tso_hdrs_dma,
GFP_KERNEL);
if (!txq->tso_hdrs) {
ret = -ENOMEM;
goto alloc_failed;
}
}
for (i = 0; i < fep->num_rx_queues; i++) {
fep->rx_queue[i] = kzalloc(sizeof(*fep->rx_queue[i]),
GFP_KERNEL);
if (!fep->rx_queue[i]) {
ret = -ENOMEM;
goto alloc_failed;
}
fep->rx_queue[i]->bd.ring_size = RX_RING_SIZE;
fep->total_rx_ring_size += fep->rx_queue[i]->bd.ring_size;
}
return ret;
alloc_failed:
fec_enet_free_queue(ndev);
return ret;
}
static int
fec_enet_alloc_rxq_buffers(struct net_device *ndev, unsigned int queue)
{
struct fec_enet_private *fep = netdev_priv(ndev);
unsigned int i;
struct sk_buff *skb;
struct bufdesc *bdp;
struct fec_enet_priv_rx_q *rxq;
rxq = fep->rx_queue[queue];
bdp = rxq->bd.base;
for (i = 0; i < rxq->bd.ring_size; i++) {
skb = netdev_alloc_skb(ndev, FEC_ENET_RX_FRSIZE);
if (!skb)
goto err_alloc;
if (fec_enet_new_rxbdp(ndev, bdp, skb)) {
dev_kfree_skb(skb);
goto err_alloc;
}
rxq->rx_skbuff[i] = skb;
bdp->cbd_sc = cpu_to_fec16(BD_ENET_RX_EMPTY);
if (fep->bufdesc_ex) {
struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
ebdp->cbd_esc = cpu_to_fec32(BD_ENET_RX_INT);
}
bdp = fec_enet_get_nextdesc(bdp, &rxq->bd);
}
/* Set the last buffer to wrap. */
bdp = fec_enet_get_prevdesc(bdp, &rxq->bd);
bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP);
return 0;
err_alloc:
fec_enet_free_buffers(ndev);
return -ENOMEM;
}
static int
fec_enet_alloc_txq_buffers(struct net_device *ndev, unsigned int queue)
{
struct fec_enet_private *fep = netdev_priv(ndev);
unsigned int i;
struct bufdesc *bdp;
struct fec_enet_priv_tx_q *txq;
txq = fep->tx_queue[queue];
bdp = txq->bd.base;
for (i = 0; i < txq->bd.ring_size; i++) {
txq->tx_bounce[i] = kmalloc(FEC_ENET_TX_FRSIZE, GFP_KERNEL);
if (!txq->tx_bounce[i])
goto err_alloc;
bdp->cbd_sc = cpu_to_fec16(0);
bdp->cbd_bufaddr = cpu_to_fec32(0);
if (fep->bufdesc_ex) {
struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
ebdp->cbd_esc = cpu_to_fec32(BD_ENET_TX_INT);
}
bdp = fec_enet_get_nextdesc(bdp, &txq->bd);
}
/* Set the last buffer to wrap. */
bdp = fec_enet_get_prevdesc(bdp, &txq->bd);
bdp->cbd_sc |= cpu_to_fec16(BD_SC_WRAP);
return 0;
err_alloc:
fec_enet_free_buffers(ndev);
return -ENOMEM;
}
static int fec_enet_alloc_buffers(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
unsigned int i;
for (i = 0; i < fep->num_rx_queues; i++)
if (fec_enet_alloc_rxq_buffers(ndev, i))
return -ENOMEM;
for (i = 0; i < fep->num_tx_queues; i++)
if (fec_enet_alloc_txq_buffers(ndev, i))
return -ENOMEM;
return 0;
}
static int
fec_enet_open(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
int ret;
bool reset_again;
ret = pm_runtime_resume_and_get(&fep->pdev->dev);
if (ret < 0)
return ret;
pinctrl_pm_select_default_state(&fep->pdev->dev);
ret = fec_enet_clk_enable(ndev, true);
if (ret)
goto clk_enable;
/* During the first fec_enet_open call the PHY isn't probed at this
* point. Therefore the phy_reset_after_clk_enable() call within
* fec_enet_clk_enable() fails. As we need this reset in order to be
* sure the PHY is working correctly we check if we need to reset again
* later when the PHY is probed
*/
if (ndev->phydev && ndev->phydev->drv)
reset_again = false;
else
reset_again = true;
/* I should reset the ring buffers here, but I don't yet know
* a simple way to do that.
*/
ret = fec_enet_alloc_buffers(ndev);
if (ret)
goto err_enet_alloc;
/* Init MAC prior to mii bus probe */
fec_restart(ndev);
/* Call phy_reset_after_clk_enable() again if it failed during
* phy_reset_after_clk_enable() before because the PHY wasn't probed.
*/
if (reset_again)
fec_enet_phy_reset_after_clk_enable(ndev);
/* Probe and connect to PHY when open the interface */
ret = fec_enet_mii_probe(ndev);
if (ret)
goto err_enet_mii_probe;
if (fep->quirks & FEC_QUIRK_ERR006687)
imx6q_cpuidle_fec_irqs_used();
napi_enable(&fep->napi);
phy_start(ndev->phydev);
netif_tx_start_all_queues(ndev);
device_set_wakeup_enable(&ndev->dev, fep->wol_flag &
FEC_WOL_FLAG_ENABLE);
return 0;
err_enet_mii_probe:
fec_enet_free_buffers(ndev);
err_enet_alloc:
fec_enet_clk_enable(ndev, false);
clk_enable:
pm_runtime_mark_last_busy(&fep->pdev->dev);
pm_runtime_put_autosuspend(&fep->pdev->dev);
pinctrl_pm_select_sleep_state(&fep->pdev->dev);
return ret;
}
static int
fec_enet_close(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
phy_stop(ndev->phydev);
if (netif_device_present(ndev)) {
napi_disable(&fep->napi);
netif_tx_disable(ndev);
fec_stop(ndev);
}
phy_disconnect(ndev->phydev);
if (fep->quirks & FEC_QUIRK_ERR006687)
imx6q_cpuidle_fec_irqs_unused();
fec_enet_update_ethtool_stats(ndev);
fec_enet_clk_enable(ndev, false);
pinctrl_pm_select_sleep_state(&fep->pdev->dev);
pm_runtime_mark_last_busy(&fep->pdev->dev);
pm_runtime_put_autosuspend(&fep->pdev->dev);
fec_enet_free_buffers(ndev);
return 0;
}
/* Set or clear the multicast filter for this adaptor.
* Skeleton taken from sunlance driver.
* The CPM Ethernet implementation allows Multicast as well as individual
* MAC address filtering. Some of the drivers check to make sure it is
* a group multicast address, and discard those that are not. I guess I
* will do the same for now, but just remove the test if you want
* individual filtering as well (do the upper net layers want or support
* this kind of feature?).
*/
#define FEC_HASH_BITS 6 /* #bits in hash */
static void set_multicast_list(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct netdev_hw_addr *ha;
unsigned int crc, tmp;
unsigned char hash;
unsigned int hash_high = 0, hash_low = 0;
if (ndev->flags & IFF_PROMISC) {
tmp = readl(fep->hwp + FEC_R_CNTRL);
tmp |= 0x8;
writel(tmp, fep->hwp + FEC_R_CNTRL);
return;
}
tmp = readl(fep->hwp + FEC_R_CNTRL);
tmp &= ~0x8;
writel(tmp, fep->hwp + FEC_R_CNTRL);
if (ndev->flags & IFF_ALLMULTI) {
/* Catch all multicast addresses, so set the
* filter to all 1's
*/
writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
return;
}
/* Add the addresses in hash register */
netdev_for_each_mc_addr(ha, ndev) {
/* calculate crc32 value of mac address */
crc = ether_crc_le(ndev->addr_len, ha->addr);
/* only upper 6 bits (FEC_HASH_BITS) are used
* which point to specific bit in the hash registers
*/
hash = (crc >> (32 - FEC_HASH_BITS)) & 0x3f;
if (hash > 31)
hash_high |= 1 << (hash - 32);
else
hash_low |= 1 << hash;
}
writel(hash_high, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
writel(hash_low, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
}
/* Set a MAC change in hardware. */
static int
fec_set_mac_address(struct net_device *ndev, void *p)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct sockaddr *addr = p;
if (addr) {
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
eth_hw_addr_set(ndev, addr->sa_data);
}
/* Add netif status check here to avoid system hang in below case:
* ifconfig ethx down; ifconfig ethx hw ether xx:xx:xx:xx:xx:xx;
* After ethx down, fec all clocks are gated off and then register
* access causes system hang.
*/
if (!netif_running(ndev))
return 0;
writel(ndev->dev_addr[3] | (ndev->dev_addr[2] << 8) |
(ndev->dev_addr[1] << 16) | (ndev->dev_addr[0] << 24),
fep->hwp + FEC_ADDR_LOW);
writel((ndev->dev_addr[5] << 16) | (ndev->dev_addr[4] << 24),
fep->hwp + FEC_ADDR_HIGH);
return 0;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
/**
* fec_poll_controller - FEC Poll controller function
* @dev: The FEC network adapter
*
* Polled functionality used by netconsole and others in non interrupt mode
*
*/
static void fec_poll_controller(struct net_device *dev)
{
int i;
struct fec_enet_private *fep = netdev_priv(dev);
for (i = 0; i < FEC_IRQ_NUM; i++) {
if (fep->irq[i] > 0) {
disable_irq(fep->irq[i]);
fec_enet_interrupt(fep->irq[i], dev);
enable_irq(fep->irq[i]);
}
}
}
#endif
static inline void fec_enet_set_netdev_features(struct net_device *netdev,
netdev_features_t features)
{
struct fec_enet_private *fep = netdev_priv(netdev);
netdev_features_t changed = features ^ netdev->features;
netdev->features = features;
/* Receive checksum has been changed */
if (changed & NETIF_F_RXCSUM) {
if (features & NETIF_F_RXCSUM)
fep->csum_flags |= FLAG_RX_CSUM_ENABLED;
else
fep->csum_flags &= ~FLAG_RX_CSUM_ENABLED;
}
}
static int fec_set_features(struct net_device *netdev,
netdev_features_t features)
{
struct fec_enet_private *fep = netdev_priv(netdev);
netdev_features_t changed = features ^ netdev->features;
if (netif_running(netdev) && changed & NETIF_F_RXCSUM) {
napi_disable(&fep->napi);
netif_tx_lock_bh(netdev);
fec_stop(netdev);
fec_enet_set_netdev_features(netdev, features);
fec_restart(netdev);
netif_tx_wake_all_queues(netdev);
netif_tx_unlock_bh(netdev);
napi_enable(&fep->napi);
} else {
fec_enet_set_netdev_features(netdev, features);
}
return 0;
}
static u16 fec_enet_get_raw_vlan_tci(struct sk_buff *skb)
{
struct vlan_ethhdr *vhdr;
unsigned short vlan_TCI = 0;
if (skb->protocol == htons(ETH_P_ALL)) {
vhdr = (struct vlan_ethhdr *)(skb->data);
vlan_TCI = ntohs(vhdr->h_vlan_TCI);
}
return vlan_TCI;
}
static u16 fec_enet_select_queue(struct net_device *ndev, struct sk_buff *skb,
struct net_device *sb_dev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
u16 vlan_tag;
if (!(fep->quirks & FEC_QUIRK_HAS_AVB))
return netdev_pick_tx(ndev, skb, NULL);
vlan_tag = fec_enet_get_raw_vlan_tci(skb);
if (!vlan_tag)
return vlan_tag;
return fec_enet_vlan_pri_to_queue[vlan_tag >> 13];
}
static const struct net_device_ops fec_netdev_ops = {
.ndo_open = fec_enet_open,
.ndo_stop = fec_enet_close,
.ndo_start_xmit = fec_enet_start_xmit,
.ndo_select_queue = fec_enet_select_queue,
.ndo_set_rx_mode = set_multicast_list,
.ndo_validate_addr = eth_validate_addr,
.ndo_tx_timeout = fec_timeout,
.ndo_set_mac_address = fec_set_mac_address,
.ndo_eth_ioctl = fec_enet_ioctl,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = fec_poll_controller,
#endif
.ndo_set_features = fec_set_features,
};
static const unsigned short offset_des_active_rxq[] = {
FEC_R_DES_ACTIVE_0, FEC_R_DES_ACTIVE_1, FEC_R_DES_ACTIVE_2
};
static const unsigned short offset_des_active_txq[] = {
FEC_X_DES_ACTIVE_0, FEC_X_DES_ACTIVE_1, FEC_X_DES_ACTIVE_2
};
/*
* XXX: We need to clean up on failure exits here.
*
*/
static int fec_enet_init(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
struct bufdesc *cbd_base;
dma_addr_t bd_dma;
int bd_size;
unsigned int i;
unsigned dsize = fep->bufdesc_ex ? sizeof(struct bufdesc_ex) :
sizeof(struct bufdesc);
unsigned dsize_log2 = __fls(dsize);
int ret;
WARN_ON(dsize != (1 << dsize_log2));
#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
fep->rx_align = 0xf;
fep->tx_align = 0xf;
#else
fep->rx_align = 0x3;
fep->tx_align = 0x3;
#endif
/* Check mask of the streaming and coherent API */
ret = dma_set_mask_and_coherent(&fep->pdev->dev, DMA_BIT_MASK(32));
if (ret < 0) {
dev_warn(&fep->pdev->dev, "No suitable DMA available\n");
return ret;
}
ret = fec_enet_alloc_queue(ndev);
if (ret)
return ret;
bd_size = (fep->total_tx_ring_size + fep->total_rx_ring_size) * dsize;
/* Allocate memory for buffer descriptors. */
cbd_base = dmam_alloc_coherent(&fep->pdev->dev, bd_size, &bd_dma,
GFP_KERNEL);
if (!cbd_base) {
ret = -ENOMEM;
goto free_queue_mem;
}
/* Get the Ethernet address */
ret = fec_get_mac(ndev);
if (ret)
goto free_queue_mem;
/* make sure MAC we just acquired is programmed into the hw */
fec_set_mac_address(ndev, NULL);
/* Set receive and transmit descriptor base. */
for (i = 0; i < fep->num_rx_queues; i++) {
struct fec_enet_priv_rx_q *rxq = fep->rx_queue[i];
unsigned size = dsize * rxq->bd.ring_size;
rxq->bd.qid = i;
rxq->bd.base = cbd_base;
rxq->bd.cur = cbd_base;
rxq->bd.dma = bd_dma;
rxq->bd.dsize = dsize;
rxq->bd.dsize_log2 = dsize_log2;
rxq->bd.reg_desc_active = fep->hwp + offset_des_active_rxq[i];
bd_dma += size;
cbd_base = (struct bufdesc *)(((void *)cbd_base) + size);
rxq->bd.last = (struct bufdesc *)(((void *)cbd_base) - dsize);
}
for (i = 0; i < fep->num_tx_queues; i++) {
struct fec_enet_priv_tx_q *txq = fep->tx_queue[i];
unsigned size = dsize * txq->bd.ring_size;
txq->bd.qid = i;
txq->bd.base = cbd_base;
txq->bd.cur = cbd_base;
txq->bd.dma = bd_dma;
txq->bd.dsize = dsize;
txq->bd.dsize_log2 = dsize_log2;
txq->bd.reg_desc_active = fep->hwp + offset_des_active_txq[i];
bd_dma += size;
cbd_base = (struct bufdesc *)(((void *)cbd_base) + size);
txq->bd.last = (struct bufdesc *)(((void *)cbd_base) - dsize);
}
/* The FEC Ethernet specific entries in the device structure */
ndev->watchdog_timeo = TX_TIMEOUT;
ndev->netdev_ops = &fec_netdev_ops;
ndev->ethtool_ops = &fec_enet_ethtool_ops;
writel(FEC_RX_DISABLED_IMASK, fep->hwp + FEC_IMASK);
netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi, NAPI_POLL_WEIGHT);
if (fep->quirks & FEC_QUIRK_HAS_VLAN)
/* enable hw VLAN support */
ndev->features |= NETIF_F_HW_VLAN_CTAG_RX;
if (fep->quirks & FEC_QUIRK_HAS_CSUM) {
ndev->gso_max_segs = FEC_MAX_TSO_SEGS;
/* enable hw accelerator */
ndev->features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
| NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO);
fep->csum_flags |= FLAG_RX_CSUM_ENABLED;
}
if (fep->quirks & FEC_QUIRK_HAS_MULTI_QUEUES) {
fep->tx_align = 0;
fep->rx_align = 0x3f;
}
ndev->hw_features = ndev->features;
fec_restart(ndev);
if (fep->quirks & FEC_QUIRK_MIB_CLEAR)
fec_enet_clear_ethtool_stats(ndev);
else
fec_enet_update_ethtool_stats(ndev);
return 0;
free_queue_mem:
fec_enet_free_queue(ndev);
return ret;
}
#ifdef CONFIG_OF
static int fec_reset_phy(struct platform_device *pdev)
{
int err, phy_reset;
bool active_high = false;
int msec = 1, phy_post_delay = 0;
struct device_node *np = pdev->dev.of_node;
if (!np)
return 0;
err = of_property_read_u32(np, "phy-reset-duration", &msec);
/* A sane reset duration should not be longer than 1s */
if (!err && msec > 1000)
msec = 1;
phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
if (phy_reset == -EPROBE_DEFER)
return phy_reset;
else if (!gpio_is_valid(phy_reset))
return 0;
err = of_property_read_u32(np, "phy-reset-post-delay", &phy_post_delay);
/* valid reset duration should be less than 1s */
if (!err && phy_post_delay > 1000)
return -EINVAL;
active_high = of_property_read_bool(np, "phy-reset-active-high");
err = devm_gpio_request_one(&pdev->dev, phy_reset,
active_high ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
"phy-reset");
if (err) {
dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err);
return err;
}
if (msec > 20)
msleep(msec);
else
usleep_range(msec * 1000, msec * 1000 + 1000);
gpio_set_value_cansleep(phy_reset, !active_high);
if (!phy_post_delay)
return 0;
if (phy_post_delay > 20)
msleep(phy_post_delay);
else
usleep_range(phy_post_delay * 1000,
phy_post_delay * 1000 + 1000);
return 0;
}
#else /* CONFIG_OF */
static int fec_reset_phy(struct platform_device *pdev)
{
/*
* In case of platform probe, the reset has been done
* by machine code.
*/
return 0;
}
#endif /* CONFIG_OF */
static void
fec_enet_get_queue_num(struct platform_device *pdev, int *num_tx, int *num_rx)
{
struct device_node *np = pdev->dev.of_node;
*num_tx = *num_rx = 1;
if (!np || !of_device_is_available(np))
return;
/* parse the num of tx and rx queues */
of_property_read_u32(np, "fsl,num-tx-queues", num_tx);
of_property_read_u32(np, "fsl,num-rx-queues", num_rx);
if (*num_tx < 1 || *num_tx > FEC_ENET_MAX_TX_QS) {
dev_warn(&pdev->dev, "Invalid num_tx(=%d), fall back to 1\n",
*num_tx);
*num_tx = 1;
return;
}
if (*num_rx < 1 || *num_rx > FEC_ENET_MAX_RX_QS) {
dev_warn(&pdev->dev, "Invalid num_rx(=%d), fall back to 1\n",
*num_rx);
*num_rx = 1;
return;
}
}
static int fec_enet_get_irq_cnt(struct platform_device *pdev)
{
int irq_cnt = platform_irq_count(pdev);
if (irq_cnt > FEC_IRQ_NUM)
irq_cnt = FEC_IRQ_NUM; /* last for pps */
else if (irq_cnt == 2)
irq_cnt = 1; /* last for pps */
else if (irq_cnt <= 0)
irq_cnt = 1; /* At least 1 irq is needed */
return irq_cnt;
}
static void fec_enet_get_wakeup_irq(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct fec_enet_private *fep = netdev_priv(ndev);
if (fep->quirks & FEC_QUIRK_WAKEUP_FROM_INT2)
fep->wake_irq = fep->irq[2];
else
fep->wake_irq = fep->irq[0];
}
static int fec_enet_init_stop_mode(struct fec_enet_private *fep,
struct device_node *np)
{
struct device_node *gpr_np;
u32 out_val[3];
int ret = 0;
gpr_np = of_parse_phandle(np, "fsl,stop-mode", 0);
if (!gpr_np)
return 0;
ret = of_property_read_u32_array(np, "fsl,stop-mode", out_val,
ARRAY_SIZE(out_val));
if (ret) {
dev_dbg(&fep->pdev->dev, "no stop mode property\n");
return ret;
}
fep->stop_gpr.gpr = syscon_node_to_regmap(gpr_np);
if (IS_ERR(fep->stop_gpr.gpr)) {
dev_err(&fep->pdev->dev, "could not find gpr regmap\n");
ret = PTR_ERR(fep->stop_gpr.gpr);
fep->stop_gpr.gpr = NULL;
goto out;
}
fep->stop_gpr.reg = out_val[1];
fep->stop_gpr.bit = out_val[2];
out:
of_node_put(gpr_np);
return ret;
}
static int
fec_probe(struct platform_device *pdev)
{
struct fec_enet_private *fep;
struct fec_platform_data *pdata;
phy_interface_t interface;
struct net_device *ndev;
int i, irq, ret = 0;
const struct of_device_id *of_id;
static int dev_id;
struct device_node *np = pdev->dev.of_node, *phy_node;
int num_tx_qs;
int num_rx_qs;
char irq_name[8];
int irq_cnt;
struct fec_devinfo *dev_info;
fec_enet_get_queue_num(pdev, &num_tx_qs, &num_rx_qs);
/* Init network device */
ndev = alloc_etherdev_mqs(sizeof(struct fec_enet_private) +
FEC_STATS_SIZE, num_tx_qs, num_rx_qs);
if (!ndev)
return -ENOMEM;
SET_NETDEV_DEV(ndev, &pdev->dev);
/* setup board info structure */
fep = netdev_priv(ndev);
of_id = of_match_device(fec_dt_ids, &pdev->dev);
if (of_id)
pdev->id_entry = of_id->data;
dev_info = (struct fec_devinfo *)pdev->id_entry->driver_data;
if (dev_info)
fep->quirks = dev_info->quirks;
fep->netdev = ndev;
fep->num_rx_queues = num_rx_qs;
fep->num_tx_queues = num_tx_qs;
#if !defined(CONFIG_M5272)
/* default enable pause frame auto negotiation */
if (fep->quirks & FEC_QUIRK_HAS_GBIT)
fep->pause_flag |= FEC_PAUSE_FLAG_AUTONEG;
#endif
/* Select default pin state */
pinctrl_pm_select_default_state(&pdev->dev);
fep->hwp = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(fep->hwp)) {
ret = PTR_ERR(fep->hwp);
goto failed_ioremap;
}
fep->pdev = pdev;
fep->dev_id = dev_id++;
platform_set_drvdata(pdev, ndev);
if ((of_machine_is_compatible("fsl,imx6q") ||
of_machine_is_compatible("fsl,imx6dl")) &&
!of_property_read_bool(np, "fsl,err006687-workaround-present"))
fep->quirks |= FEC_QUIRK_ERR006687;
if (of_get_property(np, "fsl,magic-packet", NULL))
fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET;
ret = fec_enet_init_stop_mode(fep, np);
if (ret)
goto failed_stop_mode;
phy_node = of_parse_phandle(np, "phy-handle", 0);
if (!phy_node && of_phy_is_fixed_link(np)) {
ret = of_phy_register_fixed_link(np);
if (ret < 0) {
dev_err(&pdev->dev,
"broken fixed-link specification\n");
goto failed_phy;
}
phy_node = of_node_get(np);
}
fep->phy_node = phy_node;
ret = of_get_phy_mode(pdev->dev.of_node, &interface);
if (ret) {
pdata = dev_get_platdata(&pdev->dev);
if (pdata)
fep->phy_interface = pdata->phy;
else
fep->phy_interface = PHY_INTERFACE_MODE_MII;
} else {
fep->phy_interface = interface;
}
ret = fec_enet_parse_rgmii_delay(fep, np);
if (ret)
goto failed_rgmii_delay;
fep->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
if (IS_ERR(fep->clk_ipg)) {
ret = PTR_ERR(fep->clk_ipg);
goto failed_clk;
}
fep->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
if (IS_ERR(fep->clk_ahb)) {
ret = PTR_ERR(fep->clk_ahb);
goto failed_clk;
}
fep->itr_clk_rate = clk_get_rate(fep->clk_ahb);
/* enet_out is optional, depends on board */
fep->clk_enet_out = devm_clk_get(&pdev->dev, "enet_out");
if (IS_ERR(fep->clk_enet_out))
fep->clk_enet_out = NULL;
fep->ptp_clk_on = false;
mutex_init(&fep->ptp_clk_mutex);
/* clk_ref is optional, depends on board */
fep->clk_ref = devm_clk_get(&pdev->dev, "enet_clk_ref");
if (IS_ERR(fep->clk_ref))
fep->clk_ref = NULL;
fep->clk_ref_rate = clk_get_rate(fep->clk_ref);
/* clk_2x_txclk is optional, depends on board */
if (fep->rgmii_txc_dly || fep->rgmii_rxc_dly) {
fep->clk_2x_txclk = devm_clk_get(&pdev->dev, "enet_2x_txclk");
if (IS_ERR(fep->clk_2x_txclk))
fep->clk_2x_txclk = NULL;
}
fep->bufdesc_ex = fep->quirks & FEC_QUIRK_HAS_BUFDESC_EX;
fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp");
if (IS_ERR(fep->clk_ptp)) {
fep->clk_ptp = NULL;
fep->bufdesc_ex = false;
}
ret = fec_enet_clk_enable(ndev, true);
if (ret)
goto failed_clk;
ret = clk_prepare_enable(fep->clk_ipg);
if (ret)
goto failed_clk_ipg;
ret = clk_prepare_enable(fep->clk_ahb);
if (ret)
goto failed_clk_ahb;
fep->reg_phy = devm_regulator_get_optional(&pdev->dev, "phy");
if (!IS_ERR(fep->reg_phy)) {
ret = regulator_enable(fep->reg_phy);
if (ret) {
dev_err(&pdev->dev,
"Failed to enable phy regulator: %d\n", ret);
goto failed_regulator;
}
} else {
if (PTR_ERR(fep->reg_phy) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
goto failed_regulator;
}
fep->reg_phy = NULL;
}
pm_runtime_set_autosuspend_delay(&pdev->dev, FEC_MDIO_PM_TIMEOUT);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_get_noresume(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
ret = fec_reset_phy(pdev);
if (ret)
goto failed_reset;
irq_cnt = fec_enet_get_irq_cnt(pdev);
if (fep->bufdesc_ex)
fec_ptp_init(pdev, irq_cnt);
ret = fec_enet_init(ndev);
if (ret)
goto failed_init;
for (i = 0; i < irq_cnt; i++) {
snprintf(irq_name, sizeof(irq_name), "int%d", i);
irq = platform_get_irq_byname_optional(pdev, irq_name);
if (irq < 0)
irq = platform_get_irq(pdev, i);
if (irq < 0) {
ret = irq;
goto failed_irq;
}
ret = devm_request_irq(&pdev->dev, irq, fec_enet_interrupt,
0, pdev->name, ndev);
if (ret)
goto failed_irq;
fep->irq[i] = irq;
}
/* Decide which interrupt line is wakeup capable */
fec_enet_get_wakeup_irq(pdev);
ret = fec_enet_mii_init(pdev);
if (ret)
goto failed_mii_init;
/* Carrier starts down, phylib will bring it up */
netif_carrier_off(ndev);
fec_enet_clk_enable(ndev, false);
pinctrl_pm_select_sleep_state(&pdev->dev);
ndev->max_mtu = PKT_MAXBUF_SIZE - ETH_HLEN - ETH_FCS_LEN;
ret = register_netdev(ndev);
if (ret)
goto failed_register;
device_init_wakeup(&ndev->dev, fep->wol_flag &
FEC_WOL_HAS_MAGIC_PACKET);
if (fep->bufdesc_ex && fep->ptp_clock)
netdev_info(ndev, "registered PHC device %d\n", fep->dev_id);
fep->rx_copybreak = COPYBREAK_DEFAULT;
INIT_WORK(&fep->tx_timeout_work, fec_enet_timeout_work);
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);
return 0;
failed_register:
fec_enet_mii_remove(fep);
failed_mii_init:
failed_irq:
failed_init:
fec_ptp_stop(pdev);
failed_reset:
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
failed_regulator:
clk_disable_unprepare(fep->clk_ahb);
failed_clk_ahb:
clk_disable_unprepare(fep->clk_ipg);
failed_clk_ipg:
fec_enet_clk_enable(ndev, false);
failed_clk:
failed_rgmii_delay:
if (of_phy_is_fixed_link(np))
of_phy_deregister_fixed_link(np);
of_node_put(phy_node);
failed_stop_mode:
failed_phy:
dev_id--;
failed_ioremap:
free_netdev(ndev);
return ret;
}
static int
fec_drv_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct fec_enet_private *fep = netdev_priv(ndev);
struct device_node *np = pdev->dev.of_node;
int ret;
ret = pm_runtime_resume_and_get(&pdev->dev);
if (ret < 0)
return ret;
cancel_work_sync(&fep->tx_timeout_work);
fec_ptp_stop(pdev);
unregister_netdev(ndev);
fec_enet_mii_remove(fep);
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
if (of_phy_is_fixed_link(np))
of_phy_deregister_fixed_link(np);
of_node_put(fep->phy_node);
clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_ipg);
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_disable(&pdev->dev);
free_netdev(ndev);
return 0;
}
static int __maybe_unused fec_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct fec_enet_private *fep = netdev_priv(ndev);
rtnl_lock();
if (netif_running(ndev)) {
if (fep->wol_flag & FEC_WOL_FLAG_ENABLE)
fep->wol_flag |= FEC_WOL_FLAG_SLEEP_ON;
phy_stop(ndev->phydev);
napi_disable(&fep->napi);
netif_tx_lock_bh(ndev);
netif_device_detach(ndev);
netif_tx_unlock_bh(ndev);
fec_stop(ndev);
fec_enet_clk_enable(ndev, false);
if (!(fep->wol_flag & FEC_WOL_FLAG_ENABLE))
pinctrl_pm_select_sleep_state(&fep->pdev->dev);
}
rtnl_unlock();
if (fep->reg_phy && !(fep->wol_flag & FEC_WOL_FLAG_ENABLE))
regulator_disable(fep->reg_phy);
/* SOC supply clock to phy, when clock is disabled, phy link down
* SOC control phy regulator, when regulator is disabled, phy link down
*/
if (fep->clk_enet_out || fep->reg_phy)
fep->link = 0;
return 0;
}
static int __maybe_unused fec_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct fec_enet_private *fep = netdev_priv(ndev);
int ret;
int val;
if (fep->reg_phy && !(fep->wol_flag & FEC_WOL_FLAG_ENABLE)) {
ret = regulator_enable(fep->reg_phy);
if (ret)
return ret;
}
rtnl_lock();
if (netif_running(ndev)) {
ret = fec_enet_clk_enable(ndev, true);
if (ret) {
rtnl_unlock();
goto failed_clk;
}
if (fep->wol_flag & FEC_WOL_FLAG_ENABLE) {
fec_enet_stop_mode(fep, false);
val = readl(fep->hwp + FEC_ECNTRL);
val &= ~(FEC_ECR_MAGICEN | FEC_ECR_SLEEP);
writel(val, fep->hwp + FEC_ECNTRL);
fep->wol_flag &= ~FEC_WOL_FLAG_SLEEP_ON;
} else {
pinctrl_pm_select_default_state(&fep->pdev->dev);
}
fec_restart(ndev);
netif_tx_lock_bh(ndev);
netif_device_attach(ndev);
netif_tx_unlock_bh(ndev);
napi_enable(&fep->napi);
phy_init_hw(ndev->phydev);
phy_start(ndev->phydev);
}
rtnl_unlock();
return 0;
failed_clk:
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
return ret;
}
static int __maybe_unused fec_runtime_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct fec_enet_private *fep = netdev_priv(ndev);
clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_ipg);
return 0;
}
static int __maybe_unused fec_runtime_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct fec_enet_private *fep = netdev_priv(ndev);
int ret;
ret = clk_prepare_enable(fep->clk_ahb);
if (ret)
return ret;
ret = clk_prepare_enable(fep->clk_ipg);
if (ret)
goto failed_clk_ipg;
return 0;
failed_clk_ipg:
clk_disable_unprepare(fep->clk_ahb);
return ret;
}
static const struct dev_pm_ops fec_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(fec_suspend, fec_resume)
SET_RUNTIME_PM_OPS(fec_runtime_suspend, fec_runtime_resume, NULL)
};
static struct platform_driver fec_driver = {
.driver = {
.name = DRIVER_NAME,
.pm = &fec_pm_ops,
.of_match_table = fec_dt_ids,
.suppress_bind_attrs = true,
},
.id_table = fec_devtype,
.probe = fec_probe,
.remove = fec_drv_remove,
};
module_platform_driver(fec_driver);
MODULE_LICENSE("GPL");