Release 4.7 drivers/net/ethernet/freescale/fec_main.c

Directory: drivers/net/ethernet/freescale
/*
 * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
 * Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
 *
 * Right now, I am very wasteful with the buffers.  I allocate memory
 * pages and then divide them into 2K frame buffers.  This way I know I
 * have buffers large enough to hold one frame within one buffer descriptor.
 * Once I get this working, I will use 64 or 128 byte CPM buffers, which
 * will be much more memory efficient and will easily handle lots of
 * small packets.
 *
 * Much better multiple PHY support by Magnus Damm.
 * Copyright (c) 2000 Ericsson Radio Systems AB.
 *
 * Support for FEC controller of ColdFire processors.
 * Copyright (c) 2001-2005 Greg Ungerer (gerg@snapgear.com)
 *
 * Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be)
 * Copyright (c) 2004-2006 Macq Electronique SA.
 *
 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/pm_runtime.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <net/ip.h>
#include <net/tso.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/icmp.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/mdio.h>
#include <linux/phy.h>
#include <linux/fec.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/regulator/consumer.h>
#include <linux/if_vlan.h>
#include <linux/pinctrl/consumer.h>
#include <linux/prefetch.h>

#include <asm/cacheflush.h>

#include "fec.h"

static void set_multicast_list(struct net_device *ndev);
static void fec_enet_itr_coal_init(struct net_device *ndev);


#define DRIVER_NAME	"fec"


#define FEC_ENET_GET_QUQUE(_x) ((_x == 0) ? 1 : ((_x == 1) ? 2 : 0))

/* Pause frame feild and FIFO threshold */

#define FEC_ENET_FCE	(1 << 5)

#define FEC_ENET_RSEM_V	0x84

#define FEC_ENET_RSFL_V	16

#define FEC_ENET_RAEM_V	0x8

#define FEC_ENET_RAFL_V	0x8

#define FEC_ENET_OPD_V	0xFFF0

#define FEC_MDIO_PM_TIMEOUT  100 
/* ms */


static struct platform_device_id fec_devtype[] = {
	{
		/* keep it for coldfire */
		.name = DRIVER_NAME,
		.driver_data = 0,
        }, {
		.name = "imx25-fec",
		.driver_data = FEC_QUIRK_USE_GASKET | FEC_QUIRK_HAS_RACC,
        }, {
		.name = "imx27-fec",
		.driver_data = FEC_QUIRK_HAS_RACC,
        }, {
		.name = "imx28-fec",
		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME |
				FEC_QUIRK_SINGLE_MDIO | FEC_QUIRK_HAS_RACC,
        }, {
		.name = "imx6q-fec",
		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
				FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
				FEC_QUIRK_HAS_VLAN | FEC_QUIRK_ERR006358 |
				FEC_QUIRK_HAS_RACC,
        }, {
		.name = "mvf600-fec",
		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_RACC,
        }, {
		.name = "imx6sx-fec",
		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
				FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
				FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
				FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
				FEC_QUIRK_HAS_RACC,
        }, {
		/* sentinel */
	}
};
MODULE_DEVICE_TABLE(platform, fec_devtype);


enum imx_fec_type {
	
IMX25_FEC = 1,	/* runs on i.mx25/50/53 */
	
IMX27_FEC,	/* runs on i.mx27/35/51 */
	
IMX28_FEC,
	
IMX6Q_FEC,
	
MVF600_FEC,
	
IMX6SX_FEC,
};


static const struct of_device_id fec_dt_ids[] = {
	{ .compatible = "fsl,imx25-fec", .data = &fec_devtype[IMX25_FEC], },
	{ .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], },
	{ .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], },
	{ .compatible = "fsl,imx6q-fec", .data = &fec_devtype[IMX6Q_FEC], },
	{ .compatible = "fsl,mvf600-fec", .data = &fec_devtype[MVF600_FEC], },
	{ .compatible = "fsl,imx6sx-fec", .data = &fec_devtype[IMX6SX_FEC], },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, fec_dt_ids);


static unsigned char macaddr[ETH_ALEN];
module_param_array(macaddr, byte, NULL, 0);
MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");

#if defined(CONFIG_M5272)
/*
 * Some hardware gets it MAC address out of local flash memory.
 * if this is non-zero then assume it is the address to get MAC from.
 */
#if defined(CONFIG_NETtel)

#define	FEC_FLASHMAC	0xf0006006
#elif defined(CONFIG_GILBARCONAP) || defined(CONFIG_SCALES)

#define	FEC_FLASHMAC	0xf0006000
#elif defined(CONFIG_CANCam)

#define	FEC_FLASHMAC	0xf0020000
#elif defined (CONFIG_M5272C3)

#define	FEC_FLASHMAC	(0xffe04000 + 4)
#elif defined(CONFIG_MOD5272)

#define FEC_FLASHMAC	0xffc0406b
#else

#define	FEC_FLASHMAC	0
#endif
#endif /* CONFIG_M5272 */

/* The FEC stores dest/src/type/vlan, data, and checksum for receive packets.
 */

#define PKT_MAXBUF_SIZE		1522

#define PKT_MINBUF_SIZE		64

#define PKT_MAXBLR_SIZE		1536

/* FEC receive acceleration */

#define FEC_RACC_IPDIS		(1 << 1)

#define FEC_RACC_PRODIS		(1 << 2)

#define FEC_RACC_OPTIONS	(FEC_RACC_IPDIS | FEC_RACC_PRODIS)

/*
 * The 5270/5271/5280/5282/532x RX control register also contains maximum frame
 * size bits. Other FEC hardware does not, so we need to take that into
 * account when setting it.
 */
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
    defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM)

#define	OPT_FRAME_SIZE	(PKT_MAXBUF_SIZE << 16)
#else

#define	OPT_FRAME_SIZE	0
#endif

/* FEC MII MMFR bits definition */

#define FEC_MMFR_ST		(1 << 30)

#define FEC_MMFR_OP_READ	(2 << 28)

#define FEC_MMFR_OP_WRITE	(1 << 28)

#define FEC_MMFR_PA(v)		((v & 0x1f) << 23)

#define FEC_MMFR_RA(v)		((v & 0x1f) << 18)

#define FEC_MMFR_TA		(2 << 16)

#define FEC_MMFR_DATA(v)	(v & 0xffff)
/* FEC ECR bits definition */

#define FEC_ECR_MAGICEN		(1 << 2)

#define FEC_ECR_SLEEP		(1 << 3)


#define FEC_MII_TIMEOUT		30000 
/* us */

/* Transmitter timeout */

#define TX_TIMEOUT (2 * HZ)


#define FEC_PAUSE_FLAG_AUTONEG	0x1

#define FEC_PAUSE_FLAG_ENABLE	0x2

#define FEC_WOL_HAS_MAGIC_PACKET	(0x1 << 0)

#define FEC_WOL_FLAG_ENABLE		(0x1 << 1)

#define FEC_WOL_FLAG_SLEEP_ON		(0x1 << 2)


#define COPYBREAK_DEFAULT	256


#define TSO_HEADER_SIZE		128
/* Max number of allowed TCP segments for software TSO */

#define FEC_MAX_TSO_SEGS	100

#define FEC_MAX_SKB_DESCS	(FEC_MAX_TSO_SEGS * 2 + MAX_SKB_FRAGS)


#define IS_TSO_HEADER(txq, addr) \
	((addr >= txq->tso_hdrs_dma) && \
        (addr < txq->tso_hdrs_dma + txq->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 *)(((unsigned)bdp) + bd->dsize);
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 23 46.94% 1 33.33%
troy kisky troy kisky 14 28.57% 1 33.33%
duan fugang* duan fugang* 12 24.49% 1 33.33%
Total 49 100.00% 3 100.00%



static struct bufdesc *fec_enet_get_prevdesc(struct bufdesc *bdp,
					     struct bufdesc_prop *bd)
{
	return (bdp <= bd->base) ? bd->last
			: (struct bufdesc *)(((unsigned)bdp) - bd->dsize);
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 22 44.90% 1 33.33%
troy kisky troy kisky 16 32.65% 1 33.33%
duan fugang* duan fugang* 11 22.45% 1 33.33%
Total 49 100.00% 3 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 29 74.36% 1 50.00%
troy kisky troy kisky 10 25.64% 1 50.00%
Total 39 100.00% 2 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 49 77.78% 2 50.00%
troy kisky troy kisky 14 22.22% 2 50.00%
Total 63 100.00% 4 100.00%



static void swap_buffer(void *bufaddr, int len)
{
	int i;
	unsigned int *buf = bufaddr;

	for (i = 0; i < len; i += 4, buf++)
		swab32s(buf);
}

Contributors
Person Tokens Prop Commits CommitProp
shawn guo shawn guo 42 93.33% 1 33.33%
lothar wassmann lothar wassmann 3 6.67% 2 66.67%
Total 45 100.00% 3 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
lothar wassmann lothar wassmann 62 100.00% 1 100.00%
Total 62 100.00% 1 100.00%



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);
}

Contributors
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russell king russell king 105 69.54% 1 25.00%
duan fugang* duan fugang* 23 15.23% 1 25.00%
troy kisky troy kisky 13 8.61% 1 25.00%
johannes berg johannes berg 10 6.62% 1 25.00%
Total 151 100.00% 4 100.00%



static inline bool is_ipv4_pkt(struct sk_buff *skb)
{
	return skb->protocol == htons(ETH_P_IP) && ip_hdr(skb)->version == 4;
}

Contributors
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duan fugang* duan fugang* 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
jim baxter jim baxter 67 79.76% 1 25.00%
duan fugang* duan fugang* 16 19.05% 2 50.00%
alan cox alan cox 1 1.19% 1 25.00%
Total 84 100.00% 4 100.00%


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_shinfo(skb)->frags[frag].size;

		/* Handle the last BD specially */
		if (frag == nr_frags - 1) {
			status |= (BD_ENET_TX_INTR | BD_ENET_TX_LAST);
			if (fep->bufdesc_ex) {
				estatus |= BD_ENET_TX_INT;
				if (unlikely(skb_shinfo(skb)->tx_flags &
					SKBTX_HW_TSTAMP && fep->hwts_tx_en))
					estatus |= BD_ENET_TX_TS;
			}
		}

		if (fep->bufdesc_ex) {
			if (fep->quirks & FEC_QUIRK_HAS_AVB)
				estatus |= FEC_TX_BD_FTYPE(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 = page_address(this_frag->page.p) + this_frag->page_offset;

		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);
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 397 75.48% 4 21.05%
alan cox alan cox 30 5.70% 1 5.26%
troy kisky troy kisky 27 5.13% 3 15.79%
johannes berg johannes berg 21 3.99% 1 5.26%
greg ungerer greg ungerer 13 2.47% 2 10.53%
russell king russell king 11 2.09% 1 5.26%
kevin hao kevin hao 9 1.71% 1 5.26%
lothar wassmann lothar wassmann 6 1.14% 1 5.26%
sascha hauer sascha hauer 6 1.14% 2 10.53%
frank li frank li 2 0.38% 1 5.26%
uwe kleine-koenig uwe kleine-koenig 2 0.38% 1 5.26%
sebastian andrzej siewior sebastian andrzej siewior 2 0.38% 1 5.26%
Total 526 100.00% 19 100.00%



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;
}

Contributors
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duan fugang* duan fugang* 371 61.73% 8 28.57%
troy kisky troy kisky 73 12.15% 4 14.29%
frank li frank li 60 9.98% 3 10.71%
greg ungerer greg ungerer 23 3.83% 2 7.14%
kevin hao kevin hao 13 2.16% 1 3.57%
sascha hauer sascha hauer 12 2.00% 3 10.71%
shawn guo shawn guo 12 2.00% 1 3.57%
jim baxter jim baxter 11 1.83% 1 3.57%
johannes berg johannes berg 9 1.50% 1 3.57%
russell king russell king 6 1.00% 1 3.57%
lothar wassmann lothar wassmann 6 1.00% 1 3.57%
uwe kleine-koenig uwe kleine-koenig 3 0.50% 1 3.57%
alan cox alan cox 2 0.33% 1 3.57%
Total 601 100.00% 28 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 287 84.41% 4 44.44%
johannes berg johannes berg 18 5.29% 1 11.11%
russell king russell king 17 5.00% 1 11.11%
fabian frederick fabian frederick 7 2.06% 1 11.11%
lothar wassmann lothar wassmann 6 1.76% 1 11.11%
troy kisky troy kisky 5 1.47% 1 11.11%
Total 340 100.00% 9 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 296 89.97% 4 50.00%
johannes berg johannes berg 15 4.56% 1 12.50%
fabian frederick fabian frederick 7 2.13% 1 12.50%
lothar wassmann lothar wassmann 6 1.82% 1 12.50%
troy kisky troy kisky 5 1.52% 1 12.50%
Total 329 100.00% 8 100.00%



static int fec_enet_txq_submit_tso(struct fec_enet_priv_tx_q *txq,
				   struct sk_buff *skb,
				   struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
	int total_len, data_left;
	struct bufdesc *bdp = txq->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 */
	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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 382 86.43% 6 46.15%
troy kisky troy kisky 42 9.50% 2 15.38%
frank li frank li 11 2.49% 3 23.08%
eric dumazet eric dumazet 5 1.13% 1 7.69%
lothar wassmann lothar wassmann 2 0.45% 1 7.69%
Total 442 100.00% 13 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 120 91.60% 4 57.14%
alan cox alan cox 7 5.34% 1 14.29%
frank li frank li 3 2.29% 1 14.29%
patrick mchardy patrick mchardy 1 0.76% 1 14.29%
Total 131 100.00% 7 100.00%

/* 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 (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;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 227 70.72% 2 33.33%
duan fugang* duan fugang* 39 12.15% 2 33.33%
troy kisky troy kisky 37 11.53% 1 16.67%
johannes berg johannes berg 18 5.61% 1 16.67%
Total 321 100.00% 6 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 48 87.27% 1 50.00%
troy kisky troy kisky 7 12.73% 1 50.00%
Total 55 100.00% 2 100.00%



static void fec_enet_enable_ring(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	struct fec_enet_priv_tx_q *txq;
	struct fec_enet_priv_rx_q *rxq;
	int i;

	for (i = 0; i < fep->num_rx_queues; i++) {
		rxq = fep->rx_queue[i];
		writel(rxq->bd.dma, fep->hwp + FEC_R_DES_START(i));
		writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE(i));

		/* enable DMA1/2 */
		if (i)
			writel(RCMR_MATCHEN | RCMR_CMP(i),
			       fep->hwp + FEC_RCMR(i));
	}

	for (i = 0; i < fep->num_tx_queues; i++) {
		txq = fep->tx_queue[i];
		writel(txq->bd.dma, fep->hwp + FEC_X_DES_START(i));

		/* enable DMA1/2 */
		if (i)
			writel(DMA_CLASS_EN | IDLE_SLOPE(i),
			       fep->hwp + FEC_DMA_CFG(i));
	}
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 86 46.74% 2 16.67%
duan fugang* duan fugang* 34 18.48% 2 16.67%
alan cox alan cox 26 14.13% 1 8.33%
uwe kleine-koenig uwe kleine-koenig 22 11.96% 2 16.67%
troy kisky troy kisky 6 3.26% 1 8.33%
sascha hauer sascha hauer 4 2.17% 1 8.33%
randy dunlap randy dunlap 3 1.63% 1 8.33%
greg ungerer greg ungerer 2 1.09% 1 8.33%
andrew morton andrew morton 1 0.54% 1 8.33%
Total 184 100.00% 12 100.00%



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;
			}
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 55 51.89% 1 16.67%
uwe kleine-koenig uwe kleine-koenig 27 25.47% 1 16.67%
duan fugang* duan fugang* 12 11.32% 1 16.67%
alan cox alan cox 8 7.55% 1 16.67%
troy kisky troy kisky 3 2.83% 1 16.67%
sascha hauer sascha hauer 1 0.94% 1 16.67%
Total 106 100.00% 6 100.00%

/*
 * This function is called to start or restart the FEC during a link
 * change, transmit timeout, or to reconfigure the FEC.  The network
 * packet processing for this device must be stopped before this call.
 */

static void

fec_restart(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	u32 val;
	u32 temp_mac[2];
	u32 rcntl = OPT_FRAME_SIZE | 0x04;
	u32 ecntl = 0x2; /* ETHEREN */

	/* Whack a reset.  We should wait for this.
         * For i.MX6SX SOC, enet use AXI bus, we use disable MAC
         * instead of reset MAC itself.
         */
	if (fep->quirks & FEC_QUIRK_HAS_AVB) {
		writel(0, fep->hwp + FEC_ECNTRL);
	} else {
		writel(1, fep->hwp + FEC_ECNTRL);
		udelay(10);
	}

	/*
         * enet-mac reset will reset mac address registers too,
         * so need to reconfigure it.
         */
	if (fep->quirks & FEC_QUIRK_ENET_MAC) {
		memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN);
		writel((__force u32)cpu_to_be32(temp_mac[0]),
		       fep->hwp + FEC_ADDR_LOW);
		writel((__force u32)cpu_to_be32(temp_mac[1]),
		       fep->hwp + FEC_ADDR_HIGH);
	}

	/* Clear any outstanding interrupt. */
	writel(0xffffffff, fep->hwp + FEC_IEVENT);

	fec_enet_bd_init(ndev);

	fec_enet_enable_ring(ndev);

	/* Reset tx SKB buffers. */
	fec_enet_reset_skb(ndev);

	/* Enable MII mode */
	if (fep->full_duplex == DUPLEX_FULL) {
		/* FD enable */
		writel(0x04, fep->hwp + FEC_X_CNTRL);
	} else {
		/* No Rcv on Xmit */
		rcntl |= 0x02;
		writel(0x0, fep->hwp + FEC_X_CNTRL);
	}

	/* Set MII speed */
	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);

#if !defined(CONFIG_M5272)
	if (fep->quirks & FEC_QUIRK_HAS_RACC) {
		/* set RX checksum */
		val = readl(fep->hwp + FEC_RACC);
		if (fep->csum_flags & FLAG_RX_CSUM_ENABLED)
			val |= FEC_RACC_OPTIONS;
		else
			val &= ~FEC_RACC_OPTIONS;
		writel(val, fep->hwp + FEC_RACC);
		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);

#ifndef CONFIG_M5272
	/* Enable the MIB statistic event counters */
	writel(0 << 31, fep->hwp + FEC_MIB_CTRLSTAT);
#endif

	/* And last, enable the transmit and receive processing */
	writel(ecntl, fep->hwp + FEC_ECNTRL);
	fec_enet_active_rxring(ndev);

	if (fep->bufdesc_ex)
		fec_ptp_start_cyclecounter(ndev);

	/* Enable interrupts we wish to service */
	if (fep->link)
		writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
	else
		writel(FEC_ENET_MII, fep->hwp + FEC_IMASK);

	/* Init the interrupt coalescing */
	fec_enet_itr_coal_init(ndev);

}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 265 31.81% 5 17.86%
uwe kleine-koenig uwe kleine-koenig 188 22.57% 2 7.14%
shawn guo shawn guo 85 10.20% 2 7.14%
duan fugang* duan fugang* 48 5.76% 4 14.29%
jim baxter jim baxter 44 5.28% 2 7.14%
alan cox alan cox 33 3.96% 1 3.57%
stefan wahren stefan wahren 33 3.96% 1 3.57%
eric benard eric benard 25 3.00% 1 3.57%
guenter roeck guenter roeck 19 2.28% 1 3.57%
markus pargmann markus pargmann 18 2.16% 1 3.57%
chris healy chris healy 17 2.04% 1 3.57%
philippe reynes philippe reynes 14 1.68% 1 3.57%
troy kisky troy kisky 11 1.32% 1 3.57%
lothar wassmann lothar wassmann 10 1.20% 1 3.57%
greg ungerer greg ungerer 9 1.08% 1 3.57%
johannes berg johannes berg 8 0.96% 1 3.57%
russell king russell king 5 0.60% 1 3.57%
fabio estevam fabio estevam 1 0.12% 1 3.57%
Total 833 100.00% 28 100.00%


static void

fec_stop(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
	u32 rmii_mode = readl(fep->hwp + FEC_R_CNTRL) & (1 << 8);
	u32 val;

	/* We cannot expect a graceful transmit stop without link !!! */
	if (fep->link) {
		writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */
		udelay(10);
		if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA))
			netdev_err(ndev, "Graceful transmit stop did not complete!\n");
	}

	/* Whack a reset.  We should wait for this.
         * For i.MX6SX SOC, enet use AXI bus, we use disable MAC
         * instead of reset MAC itself.
         */
	if (!(fep->wol_flag & FEC_WOL_FLAG_SLEEP_ON)) {
		if (fep->quirks & FEC_QUIRK_HAS_AVB) {
			writel(0, fep->hwp + FEC_ECNTRL);
		} else {
			writel(1, fep->hwp + FEC_ECNTRL);
			udelay(10);
		}
		writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
	} else {
		writel(FEC_DEFAULT_IMASK | FEC_ENET_WAKEUP, fep->hwp + FEC_IMASK);
		val = readl(fep->hwp + FEC_ECNTRL);
		val |= (FEC_ECR_MAGICEN | FEC_ECR_SLEEP);
		writel(val, fep->hwp + FEC_ECNTRL);

		if (pdata && pdata->sleep_mode_enable)
			pdata->sleep_mode_enable(true);
	}
	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);

	/* We have to keep ENET enabled to have MII interrupt stay working */
	if (fep->quirks & FEC_QUIRK_ENET_MAC &&
		!(fep->wol_flag & FEC_WOL_FLAG_SLEEP_ON)) {
		writel(2, fep->hwp + FEC_ECNTRL);
		writel(rmii_mode, fep->hwp + FEC_R_CNTRL);
	}
}


Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 126 44.21% 2 15.38%
uwe kleine-koenig uwe kleine-koenig 66 23.16% 2 15.38%
lothar wassmann lothar wassmann 35 12.28% 2 15.38%
alan cox alan cox 23 8.07% 1 7.69%
shawn guo shawn guo 20 7.02% 2 15.38%
sebastian andrzej siewior sebastian andrzej siewior 5 1.75% 1 7.69%
joe perches joe perches 4 1.40% 1 7.69%
sascha hauer sascha hauer 4 1.40% 1 7.69%
greg ungerer greg ungerer 2 0.70% 1 7.69%
Total 285 100.00% 13 100.00%


static void

fec_timeout(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);

	fec_dump(ndev);

	ndev->stats.tx_errors++;

	schedule_work(&fep->tx_timeout_work);
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 27 65.85% 1 25.00%
russell king russell king 7 17.07% 2 50.00%
frank li frank li 7 17.07% 1 25.00%
Total 41 100.00% 4 100.00%



static void fec_enet_timeout_work(struct work_struct *work)
{
	struct fec_enet_private *fep =
		container_of(work, struct fec_enet_private, tx_timeout_work);
	struct net_device *ndev = fep->netdev;

	rtnl_lock();
	if (netif_device_present(ndev) || netif_running(ndev)) {
		napi_disable(&fep->napi);
		netif_tx_lock_bh(ndev);
		fec_restart(ndev);
		netif_wake_queue(ndev);
		netif_tx_unlock_bh(ndev);
		napi_enable(&fep->napi);
	}
	rtnl_unlock();
}

Contributors
Person Tokens Prop Commits CommitProp
russell king russell king 60 65.93% 5 71.43%
frank li frank li 23 25.27% 1 14.29%
uwe kleine-koenig uwe kleine-koenig 8 8.79% 1 14.29%
Total 91 100.00% 7 100.00%


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);
}

Contributors
Person Tokens Prop Commits CommitProp
russell king russell king 78 97.50% 1 50.00%
uwe kleine-koenig uwe kleine-koenig 2 2.50% 1 50.00%
Total 80 100.00% 2 100.00%


static void

fec_enet_tx_queue(struct net_device *ndev, u16 queue_id)
{
	struct	fec_enet_private *fep;
	struct bufdesc *bdp;
	unsigned short status;
	struct	sk_buff	*skb;
	struct fec_enet_priv_tx_q *txq;
	struct netdev_queue *nq;
	int	index = 0;
	int	entries_free;

	fep = netdev_priv(ndev);

	queue_id = FEC_ENET_GET_QUQUE(queue_id);

	txq = fep->tx_queue[queue_id];
	/* get next bdp of dirty_tx */
	nq = netdev_get_tx_queue(ndev, queue_id);
	bdp = txq->dirty_tx;

	/* get next bdp of dirty_tx */
	bdp = fec_enet_get_nextdesc(bdp, &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;
		}

		if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS) &&
			fep->bufdesc_ex) {
			struct skb_shared_hwtstamps shhwtstamps;
			struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;

			fec_enet_hwtstamp(fep, fec32_to_cpu(ebdp->ts), &shhwtstamps);
			skb_tstamp_tx(skb, &shhwtstamps);
		}

		/* Deferred means some collisions occurred during transmit,
                 * but we eventually sent the packet OK.
                 */
		if (status & BD_ENET_TX_DEF)
			ndev->stats.collisions++;

		/* Free the sk buffer associated with this last transmit */
		dev_kfree_skb_any(skb);
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_queue_stopped(ndev)) {
			entries_free = fec_enet_get_free_txdesc_num(txq);
			if (entries_free >= txq->tx_wake_threshold)
				netif_tx_wake_queue(nq);
		}
	}

	/* ERR006538: Keep the transmitter going */
	if (bdp != txq->bd.cur &&
	    readl(txq->bd.reg_desc_active) == 0)
		writel(0, txq->bd.reg_desc_active);
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 125 24.41% 3 12.00%
duan fugang* duan fugang* 95 18.55% 5 20.00%
frank li frank li 82 16.02% 3 12.00%
alan cox alan cox 77 15.04% 1 4.00%
troy kisky troy kisky 32 6.25% 3 12.00%
russell king russell king 31 6.05% 3 12.00%
kevin hao kevin hao 23 4.49% 1 4.00%
johannes berg johannes berg 18 3.52% 1 4.00%
sebastian andrzej siewior sebastian andrzej siewior 9 1.76% 1 4.00%
jim baxter jim baxter 8 1.56% 1 4.00%
greg ungerer greg ungerer 6 1.17% 1 4.00%
fabio estevam fabio estevam 5 0.98% 1 4.00%
sascha hauer sascha hauer 1 0.20% 1 4.00%
Total 512 100.00% 25 100.00%


static void

fec_enet_tx(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	u16 queue_id;
	/* First process class A queue, then Class B and Best Effort queue */
	for_each_set_bit(queue_id, &fep->work_tx, FEC_ENET_MAX_TX_QS) {
		clear_bit(queue_id, &fep->work_tx);
		fec_enet_tx_queue(ndev, queue_id);
	}
	return;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 130 95.59% 1 50.00%
johannes berg johannes berg 6 4.41% 1 50.00%
Total 136 100.00% 2 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 114 80.28% 1 33.33%
lothar wassmann lothar wassmann 25 17.61% 1 33.33%
johannes berg johannes berg 3 2.11% 1 33.33%
Total 142 100.00% 3 100.00%

/* 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
	queue_id = FEC_ENET_GET_QUQUE(queue_id);
	rxq = fep->rx_queue[queue_id];

	/* First, grab all of the stats for the incoming packet.
         * These get messed up if we get called due to a busy condition.
         */
	bdp = rxq->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, 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);

		/* Extract the enhanced buffer descriptor */
		ebdp = NULL;
		if (fep->bufdesc_ex)
			ebdp = (struct bufdesc_ex *)bdp;

		/* If this is a VLAN packet remove the VLAN Tag */
		vlan_packet_rcvd = false;
		if ((ndev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
		    fep->bufdesc_ex &&
		    (ebdp->cbd_esc & cpu_to_fec32(BD_ENET_RX_VLAN))) {
			/* Push and remove the vlan tag */
			struct vlan_hdr *vlan_header =
					(struct vlan_hdr *) (data + ETH_HLEN);
			vlan_tag = ntohs(vlan_header->h_vlan_TCI);

			vlan_packet_rcvd = true;

			memmove(skb->data + VLAN_HLEN, data, ETH_ALEN * 2);
			skb_pull(skb, VLAN_HLEN);
		}

		skb->protocol = eth_type_trans(skb, ndev);

		/* Get receive timestamp from the skb */
		if (fep->hwts_rx_en && fep->bufdesc_ex)
			fec_enet_hwtstamp(fep, fec32_to_cpu(ebdp->ts),
					  skb_hwtstamps(skb));

		if (fep->bufdesc_ex &&
		    (fep->csum_flags & FLAG_RX_CSUM_ENABLED)) {
			if (!(ebdp->cbd_esc & cpu_to_fec32(FLAG_RX_CSUM_ERROR))) {
				/* don't check it */
				skb->ip_summed = CHECKSUM_UNNECESSARY;
			} else {
				skb_checksum_none_assert(skb);
			}
		}

		/* Handle received VLAN packets */
		if (vlan_packet_rcvd)
			__vlan_hwaccel_put_tag(skb,
					       htons(ETH_P_8021Q),
					       vlan_tag);

		napi_gro_receive(&fep->napi, skb);

		if (is_copybreak) {
			dma_sync_single_for_device(&fep->pdev->dev,
						   fec32_to_cpu(bdp->cbd_bufaddr),
						   FEC_ENET_RX_FRSIZE - fep->rx_align,
						   DMA_FROM_DEVICE);
		} else {
			rxq->rx_skbuff[index] = skb_new;
			fec_enet_new_rxbdp(ndev, bdp, skb_new);
		}

rx_processing_done:
		/* Clear the status flags for this buffer */
		status &= ~BD_ENET_RX_STATS;

		/* Mark the buffer empty */
		status |= BD_ENET_RX_EMPTY;

		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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 187 22.53% 6 18.18%
uwe kleine-koenig uwe kleine-koenig 181 21.81% 3 9.09%
jim baxter jim baxter 158 19.04% 2 6.06%
frank li frank li 92 11.08% 3 9.09%
troy kisky troy kisky 70 8.43% 4 12.12%
alan cox alan cox 33 3.98% 1 3.03%
bryan wu bryan wu 30 3.61% 1 3.03%
johannes berg johannes berg 24 2.89% 1 3.03%
russell king russell king 16 1.93% 2 6.06%
lothar wassmann lothar wassmann 15 1.81% 2 6.06%
shawn guo shawn guo 11 1.33% 2 6.06%
greg ungerer greg ungerer 7 0.84% 3 9.09%
randy dunlap randy dunlap 3 0.36% 1 3.03%
richard cochran richard cochran 2 0.24% 1 3.03%
baruch siach baruch siach 1 0.12% 1 3.03%
Total 830 100.00% 33 100.00%


static int

fec_enet_rx(struct net_device *ndev, int budget)
{
	int     pkt_received = 0;
	u16	queue_id;
	struct fec_enet_private *fep = netdev_priv(ndev);

	for_each_set_bit(queue_id, &fep->work_rx, FEC_ENET_MAX_RX_QS) {
		int ret;

		ret = fec_enet_rx_queue(ndev,
					budget - pkt_received, queue_id);

		if (ret < budget - pkt_received)
			clear_bit(queue_id, &fep->work_rx);

		pkt_received += ret;
	}
	return pkt_received;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 57 68.67% 1 33.33%
uwe kleine-koenig uwe kleine-koenig 25 30.12% 1 33.33%
bryan wu bryan wu 1 1.20% 1 33.33%
Total 83 100.00% 3 100.00%


static bool

fec_enet_collect_events(struct fec_enet_private *fep, uint int_events)
{
	if (int_events == 0)
		return false;

	if (int_events & FEC_ENET_RXF)
		fep->work_rx |= (1 << 2);
	if (int_events & FEC_ENET_RXF_1)
		fep->work_rx |= (1 << 0);
	if (int_events & FEC_ENET_RXF_2)
		fep->work_rx |= (1 << 1);

	if (int_events & FEC_ENET_TXF)
		fep->work_tx |= (1 << 2);
	if (int_events & FEC_ENET_TXF_1)
		fep->work_tx |= (1 << 0);
	if (int_events & FEC_ENET_TXF_2)
		fep->work_tx |= (1 << 1);

	return true;
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 64 52.46% 1 50.00%
duan fugang* duan fugang* 58 47.54% 1 50.00%
Total 122 100.00% 2 100.00%


static irqreturn_t

fec_enet_interrupt(int irq, void *dev_id)
{
	struct net_device *ndev = dev_id;
	struct fec_enet_private *fep = netdev_priv(ndev);
	uint int_events;
	irqreturn_t ret = IRQ_NONE;

	int_events = readl(fep->hwp + FEC_IEVENT);
	writel(int_events, fep->hwp + FEC_IEVENT);
	fec_enet_collect_events(fep, int_events);

	if ((fep->work_tx || fep->work_rx) && fep->link) {
		ret = IRQ_HANDLED;

		if (napi_schedule_prep(&fep->napi)) {
			/* Disable the NAPI interrupts */
			writel(FEC_NAPI_IMASK, fep->hwp + FEC_IMASK);
			__napi_schedule(&fep->napi);
		}
	}

	if (int_events & FEC_ENET_MII) {
		ret = IRQ_HANDLED;
		complete(&fep->mdio_done);
	}

	if (fep->ptp_clock)
		fec_ptp_check_pps_event(fep);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 72 46.45% 1 9.09%
duan fugang* duan fugang* 34 21.94% 3 27.27%
frank li frank li 15 9.68% 1 9.09%
alan cox alan cox 11 7.10% 1 9.09%
bryan wu bryan wu 10 6.45% 1 9.09%
philipp zabel philipp zabel 6 3.87% 1 9.09%
luwei zhou luwei zhou 5 3.23% 1 9.09%
russell king russell king 1 0.65% 1 9.09%
troy kisky troy kisky 1 0.65% 1 9.09%
Total 155 100.00% 11 100.00%



static int fec_enet_rx_napi(struct napi_struct *napi, int budget)
{
	struct net_device *ndev = napi->dev;
	struct fec_enet_private *fep = netdev_priv(ndev);
	int pkts;

	pkts = fec_enet_rx(ndev, budget);

	fec_enet_tx(ndev);

	if (pkts < budget) {
		napi_complete(napi);
		writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
	}
	return pkts;
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 65 84.42% 2 66.67%
russell king russell king 12 15.58% 1 33.33%
Total 77 100.00% 3 100.00%

/* ------------------------------------------------------------------------- */


static void fec_get_mac(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	struct fec_platform_data *pdata = dev_get_platdata(&fep->pdev->dev);
	unsigned char *iap, tmpaddr[ETH_ALEN];

	/*
         * try to get mac address in following order:
         *
         * 1) module parameter via kernel command line in form
         *    fec.macaddr=0x00,0x04,0x9f,0x01,0x30,0xe0
         */
	iap = macaddr;

	/*
         * 2) from device tree data
         */
	if (!is_valid_ether_addr(iap)) {
		struct device_node *np = fep->pdev->dev.of_node;
		if (np) {
			const char *mac = of_get_mac_address(np);
			if (mac)
				iap = (unsigned char *) mac;
		}
	}

	/*
         * 3) from flash or fuse (via platform data)
         */
	if (!is_valid_ether_addr(iap)) {
#ifdef CONFIG_M5272
		if (FEC_FLASHMAC)
			iap = (unsigned char *)FEC_FLASHMAC;
#else
		if (pdata)
			iap = (unsigned char *)&pdata->mac;
#endif
	}

	/*
         * 4) FEC mac registers set by bootloader
         */
	if (!is_valid_ether_addr(iap)) {
		*((__be32 *) &tmpaddr[0]) =
			cpu_to_be32(readl(fep->hwp + FEC_ADDR_LOW));
		*((__be16 *) &tmpaddr[4]) =
			cpu_to_be16(readl(fep->hwp + FEC_ADDR_HIGH) >> 16);
		iap = &tmpaddr[0];
	}

	/*
         * 5) random mac address
         */
	if (!is_valid_ether_addr(iap)) {
		/* Report it and use a random ethernet address instead */
		netdev_err(ndev, "Invalid MAC address: %pM\n", iap);
		eth_hw_addr_random(ndev);
		netdev_info(ndev, "Using random MAC address: %pM\n",
			    ndev->dev_addr);
		return;
	}

	memcpy(ndev->dev_addr, iap, ETH_ALEN);

	/* Adjust MAC if using macaddr */
	if (iap == macaddr)
		 ndev->dev_addr[ETH_ALEN-1] = macaddr[ETH_ALEN-1] + fep->dev_id;
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 152 51.01% 2 18.18%
shawn guo shawn guo 56 18.79% 2 18.18%
lucas stach lucas stach 38 12.75% 1 9.09%
alan cox alan cox 21 7.05% 1 9.09%
bryan wu bryan wu 13 4.36% 1 9.09%
lothar wassmann lothar wassmann 7 2.35% 1 9.09%
dan carpenter dan carpenter 4 1.34% 1 9.09%
jingoo han jingoo han 4 1.34% 1 9.09%
randy dunlap randy dunlap 3 1.01% 1 9.09%
Total 298 100.00% 11 100.00%

/* ------------------------------------------------------------------------- */

/*
 * 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;

	/* Prevent a state halted on mii error */
	if (fep->mii_timeout && phy_dev->state == PHY_HALTED) {
		phy_dev->state = PHY_RESUMING;
		return;
	}

	/*
         * If the netdev is down, or is going down, we're not interested
         * in link state events, so just mark our idea of the link as down
         * and ignore the event.
         */
	if (!netif_running(ndev) || !netif_device_present(ndev)) {
		fep->link = 0;
	} else if (phy_dev->link) {
		if (!fep->link) {
			fep->link = phy_dev->link;
			status_change = 1;
		}

		if (fep->full_duplex != phy_dev->duplex) {
			fep->full_duplex = phy_dev->duplex;
			status_change = 1;
		}

		if (phy_dev->speed != fep->speed) {
			fep->speed = phy_dev->speed;
			status_change = 1;
		}

		/* if any of the above changed restart the FEC */
		if (status_change) {
			napi_disable(&fep->napi);
			netif_tx_lock_bh(ndev);
			fec_restart(ndev);
			netif_wake_queue(ndev);
			netif_tx_unlock_bh(ndev);
			napi_enable(&fep->napi);
		}
	} else {
		if (fep->link) {
			napi_disable(&fep->napi);
			netif_tx_lock_bh(ndev);
			fec_stop(ndev);
			netif_tx_unlock_bh(ndev);
			napi_enable(&fep->napi);
			fep->link = phy_dev->link;
			status_change = 1;
		}
	}

	if (status_change)
		phy_print_status(phy_dev);
}

Contributors
Person Tokens Prop Commits CommitProp
russell king russell king 93 35.23% 5 33.33%
uwe kleine-koenig uwe kleine-koenig 88 33.33% 2 13.33%
lucas stach lucas stach 44 16.67% 2 13.33%
bryan wu bryan wu 19 7.20% 1 6.67%
lothar wassmann lothar wassmann 8 3.03% 1 6.67%
alan cox alan cox 7 2.65% 1 6.67%
sascha hauer sascha hauer 2 0.76% 1 6.67%
philippe reynes philippe reynes 2 0.76% 1 6.67%
frank li frank li 1 0.38% 1 6.67%
Total 264 100.00% 15 100.00%



static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
{
	struct fec_enet_private *fep = bus->priv;
	struct device *dev = &fep->pdev->dev;
	unsigned long time_left;
	int ret = 0;

	ret = pm_runtime_get_sync(dev);
	if (ret < 0)
		return ret;

	fep->mii_timeout = 0;
	reinit_completion(&fep->mdio_done);

	/* start a read op */
	writel(FEC_MMFR_ST | FEC_MMFR_OP_READ |
		FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
		FEC_MMFR_TA, fep->hwp + FEC_MII_DATA);

	/* wait for end of transfer */
	time_left = wait_for_completion_timeout(&fep->mdio_done,
			usecs_to_jiffies(FEC_MII_TIMEOUT));
	if (time_left == 0) {
		fep->mii_timeout = 1;
		netdev_err(fep->netdev, "MDIO read timeout\n");
		ret = -ETIMEDOUT;
		goto out;
	}

	ret = FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA));

out:
	pm_runtime_mark_last_busy(dev);
	pm_runtime_put_autosuspend(dev);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 87 48.60% 1 10.00%
andrew lunn andrew lunn 54 30.17% 1 10.00%
bryan wu bryan wu 15 8.38% 1 10.00%
alan cox alan cox 8 4.47% 1 10.00%
joe perches joe perches 6 3.35% 1 10.00%
sebastian andrzej siewior sebastian andrzej siewior 2 1.12% 1 10.00%
fabio estevam fabio estevam 2 1.12% 1 10.00%
randy dunlap randy dunlap 2 1.12% 1 10.00%
greg ungerer greg ungerer 2 1.12% 1 10.00%
russell king russell king 1 0.56% 1 10.00%
Total 179 100.00% 10 100.00%



static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
			   u16 value)
{
	struct fec_enet_private *fep = bus->priv;
	struct device *dev = &fep->pdev->dev;
	unsigned long time_left;
	int ret;

	ret = pm_runtime_get_sync(dev);
	if (ret < 0)
		return ret;
	else
		ret = 0;

	fep->mii_timeout = 0;
	reinit_completion(&fep->mdio_done);

	/* start a write op */
	writel(FEC_MMFR_ST | FEC_MMFR_OP_WRITE |
		FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
		FEC_MMFR_TA | FEC_MMFR_DATA(value),
		fep->hwp + FEC_MII_DATA);

	/* wait for end of transfer */
	time_left = wait_for_completion_timeout(&fep->mdio_done,
			usecs_to_jiffies(FEC_MII_TIMEOUT));
	if (time_left == 0) {
		fep->mii_timeout = 1;
		netdev_err(fep->netdev, "MDIO write timeout\n");
		ret  = -ETIMEDOUT;
	}

	pm_runtime_mark_last_busy(dev);
	pm_runtime_put_autosuspend(dev);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 77 45.03% 1 12.50%
andrew lunn andrew lunn 43 25.15% 1 12.50%
alan cox alan cox 30 17.54% 1 12.50%
sascha hauer sascha hauer 7 4.09% 1 12.50%
joe perches joe perches 6 3.51% 1 12.50%
maciej s. szmigiero maciej s. szmigiero 5 2.92% 1 12.50%
fabio estevam fabio estevam 2 1.17% 1 12.50%
russell king russell king 1 0.58% 1 12.50%
Total 171 100.00% 8 100.00%



static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	int ret;

	if (enable) {
		ret = clk_prepare_enable(fep->clk_ahb);
		if (ret)
			return ret;
		if (fep->clk_enet_out) {
			ret = clk_prepare_enable(fep->clk_enet_out);
			if (ret)
				goto failed_clk_enet_out;
		}
		if (fep->clk_ptp) {
			mutex_lock(&fep->ptp_clk_mutex);
			ret = clk_prepare_enable(fep->clk_ptp);
			if (ret) {
				mutex_unlock(&fep->ptp_clk_mutex);
				goto failed_clk_ptp;
			} else {
				fep->ptp_clk_on = true;
			}
			mutex_unlock(&fep->ptp_clk_mutex);
		}
		if (fep->clk_ref) {
			ret = clk_prepare_enable(fep->clk_ref);
			if (ret)
				goto failed_clk_ref;
		}
	} else {
		clk_disable_unprepare(fep->clk_ahb);
		if (fep->clk_enet_out)
			clk_disable_unprepare(fep->clk_enet_out);
		if (fep->clk_ptp) {
			mutex_lock(&fep->ptp_clk_mutex);
			clk_disable_unprepare(fep->clk_ptp);
			fep->ptp_clk_on = false;
			mutex_unlock(&fep->ptp_clk_mutex);
		}
		if (fep->clk_ref)
			clk_disable_unprepare(fep->clk_ref);
	}

	return 0;

failed_clk_ref:
	if (fep->clk_ref)
		clk_disable_unprepare(fep->clk_ref);
failed_clk_ptp:
	if (fep->clk_enet_out)
		clk_disable_unprepare(fep->clk_enet_out);
failed_clk_enet_out:
		clk_disable_unprepare(fep->clk_ahb);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 274 100.00% 3 100.00%
Total 274 100.00% 3 100.00%



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)
			return -ENODEV;
	} else {
		/* check for attached phy */
		for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) {
			if (!mdiobus_is_registered_device(fep->mii_bus, phy_id))
				continue;
			if (dev_id--)
				continue;
			strlcpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
			break;
		}

		if (phy_id >= PHY_MAX_ADDR) {
			netdev_info(ndev, "no PHY, assuming direct connection to switch\n");
			strlcpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE);
			phy_id = 0;
		}

		snprintf(phy_name, sizeof(phy_name),
			 PHY_ID_FMT, mdio_bus_id, phy_id);
		phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link,
				      fep->phy_interface);
	}

	if (IS_ERR(phy_dev)) {
		netdev_err(ndev, "could not attach to PHY\n");
		return PTR_ERR(phy_dev);
	}

	/* mask with MAC supported features */
	if (fep->quirks & FEC_QUIRK_HAS_GBIT) {
		phy_dev->supported &= PHY_GBIT_FEATURES;
		phy_dev->supported &= ~SUPPORTED_1000baseT_Half;
#if !defined(CONFIG_M5272)
		phy_dev->supported |= SUPPORTED_Pause;
#endif
	}
	else
		phy_dev->supported &= PHY_BASIC_FEATURES;

	phy_dev->advertising = phy_dev->supported;

	fep->link = 0;
	fep->full_duplex = 0;

	phy_attached_info(phy_dev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 157 52.51% 3 15.79%
sascha hauer sascha hauer 52 17.39% 1 5.26%
shawn guo shawn guo 17 5.69% 2 10.53%
greg ungerer greg ungerer 11 3.68% 1 5.26%
duan fugang* duan fugang* 9 3.01% 1 5.26%
guenter roeck guenter roeck 9 3.01% 1 5.26%
alan cox alan cox 8 2.68% 1 5.26%
frank li frank li 8 2.68% 1 5.26%
russell king russell king 7 2.34% 1 5.26%
andrew lunn andrew lunn 6 2.01% 2 10.53%
joe perches joe perches 6 2.01% 1 5.26%
richard zhao richard zhao 4 1.34% 1 5.26%
rickard strandqvist rickard strandqvist 2 0.67% 1 5.26%
lothar wassmann lothar wassmann 2 0.67% 1 5.26%
florian fainelli florian fainelli 1 0.33% 1 5.26%
Total 299 100.00% 19 100.00%



static int fec_enet_mii_init(struct platform_device *pdev)
{
	static struct mii_bus *fec0_mii_bus;
	struct net_device *ndev = platform_get_drvdata(pdev);
	struct fec_enet_private *fep = netdev_priv(ndev);
	struct device_node *node;
	int err = -ENXIO;
	u32 mii_speed, holdtime;

	/*
         * The i.MX28 dual fec interfaces are not equal.
         * Here are the differences:
         *
         *  - fec0 supports MII & RMII modes while fec1 only supports RMII
         *  - fec0 acts as the 1588 time master while fec1 is slave
         *  - external phys can only be configured by fec0
         *
         * That is to say fec1 can not work independently. It only works
         * when fec0 is working. The reason behind this design is that the
         * second interface is added primarily for Switch mode.
         *
         * Because of the last point above, both phys are attached on fec0
         * mdio interface in board design, and need to be configured by
         * fec0 mii_bus.
         */
	if ((fep->quirks & FEC_QUIRK_SINGLE_MDIO) && fep->dev_id > 0) {
		/* fec1 uses fec0 mii_bus */
		if (mii_cnt && fec0_mii_bus) {
			fep->mii_bus = fec0_mii_bus;
			mii_cnt++;
			return 0;
		}
		return -ENOENT;
	}

	fep->mii_timeout = 0;

	/*
         * Set MII speed to 2.5 MHz (= clk_get_rate() / 2 * phy_speed)
         *
         * The formula for FEC MDC is 'ref_freq / (MII_SPEED x 2)' while
         * for ENET-MAC is 'ref_freq / ((MII_SPEED + 1) x 2)'.  The i.MX28
         * Reference Manual has an error on this, and gets fixed on i.MX6Q
         * document.
         */
	mii_speed = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 5000000);
	if (fep->quirks & FEC_QUIRK_ENET_MAC)
		mii_speed--;
	if (mii_speed > 63) {
		dev_err(&pdev->dev,
			"fec clock (%lu) to fast to get right mii speed\n",
			clk_get_rate(fep->clk_ipg));
		err = -EINVAL;
		goto err_out;
	}

	/*
         * The i.MX28 and i.MX6 types have another filed in the MSCR (aka
         * MII_SPEED) register that defines the MDIO output hold time. Earlier
         * versions are RAZ there, so just ignore the difference and write the
         * register always.
         * The minimal hold time according to IEE802.3 (clause 22) is 10 ns.
         * HOLDTIME + 1 is the number of clk cycles the fec is holding the
         * output.
         * The HOLDTIME bitfield takes values between 0 and 7 (inclusive).
         * Given that ceil(clkrate / 5000000) <= 64, the calculation for
         * holdtime cannot result in a value greater than 3.
         */
	holdtime = DIV_ROUND_UP(clk_get_rate(fep->clk_ipg), 100000000) - 1;

	fep->phy_speed = mii_speed << 1 | holdtime << 8;

	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);

	fep->mii_bus = mdiobus_alloc();
	if (fep->mii_bus == NULL) {
		err = -ENOMEM;
		goto err_out;
	}

	fep->mii_bus->name = "fec_enet_mii_bus";
	fep->mii_bus->read = fec_enet_mdio_read;
	fep->mii_bus->write = fec_enet_mdio_write;
	snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
		pdev->name, fep->dev_id + 1);
	fep->mii_bus->priv = fep;
	fep->mii_bus->parent = &pdev->dev;

	node = of_get_child_by_name(pdev->dev.of_node, "mdio");
	if (node) {
		err = of_mdiobus_register(fep->mii_bus, node);
		of_node_put(node);
	} else {
		err = mdiobus_register(fep->mii_bus);
	}

	if (err)
		goto err_out_free_mdiobus;

	mii_cnt++;

	/* save fec0 mii_bus */
	if (fep->quirks & FEC_QUIRK_SINGLE_MDIO)
		fec0_mii_bus = fep->mii_bus;

	return 0;

err_out_free_mdiobus:
	mdiobus_free(fep->mii_bus);
err_out:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 269 70.05% 4 23.53%
sascha hauer sascha hauer 43 11.20% 2 11.76%
lothar wassmann lothar wassmann 24 6.25% 2 11.76%
shawn guo shawn guo 20 5.21% 3 17.65%
bryan wu bryan wu 10 2.60% 1 5.88%
alan cox alan cox 8 2.08% 1 5.88%
florian fainelli florian fainelli 5 1.30% 1 5.88%
stefan agner stefan agner 3 0.78% 1 5.88%
duan fugang* duan fugang* 1 0.26% 1 5.88%
andrew lunn andrew lunn 1 0.26% 1 5.88%
Total 384 100.00% 17 100.00%



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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 15 44.12% 1 25.00%
sascha hauer sascha hauer 8 23.53% 1 25.00%
lothar wassmann lothar wassmann 6 17.65% 1 25.00%
alan cox alan cox 5 14.71% 1 25.00%
Total 34 100.00% 4 100.00%



static void fec_enet_get_drvinfo(struct net_device *ndev,
				 struct ethtool_drvinfo *info)
{
	struct fec_enet_private *fep = netdev_priv(ndev);

	strlcpy(info->driver, fep->pdev->dev.driver->name,
		sizeof(info->driver));
	strlcpy(info->version, "Revision: 1.0", sizeof(info->version));
	strlcpy(info->bus_info, dev_name(&ndev->dev), sizeof(info->bus_info));
}

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jiri pirko jiri pirko 24 27.27% 1 25.00%
sascha hauer sascha hauer 11 12.50% 1 25.00%
alan cox alan cox 2 2.27% 1 25.00%
Total 88 100.00% 4 100.00%



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;
}

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Total 58 100.00% 1 100.00%

/* List of registers that can be safety be read to dump them with ethtool */
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
	defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM)

static u32 fec_enet_register_offset[] = {
	FEC_IEVENT, FEC_IMASK, FEC_R_DES_ACTIVE_0, FEC_X_DES_ACTIVE_0,
	FEC_ECNTRL, FEC_MII_DATA, FEC_MII_SPEED, FEC_MIB_CTRLSTAT, FEC_R_CNTRL,
	FEC_X_CNTRL, FEC_ADDR_LOW, FEC_ADDR_HIGH, FEC_OPD, FEC_TXIC0, FEC_TXIC1,
	FEC_TXIC2, FEC_RXIC0, FEC_RXIC1, FEC_RXIC2, FEC_HASH_TABLE_HIGH,
	FEC_HASH_TABLE_LOW, FEC_GRP_HASH_TABLE_HIGH, FEC_GRP_HASH_TABLE_LOW,
	FEC_X_WMRK, FEC_R_BOUND, FEC_R_FSTART, FEC_R_DES_START_1,
	FEC_X_DES_START_1, FEC_R_BUFF_SIZE_1, FEC_R_DES_START_2,
	FEC_X_DES_START_2, FEC_R_BUFF_SIZE_2, FEC_R_DES_START_0,
	FEC_X_DES_START_0, FEC_R_BUFF_SIZE_0, FEC_R_FIFO_RSFL, FEC_R_FIFO_RSEM,
	FEC_R_FIFO_RAEM, FEC_R_FIFO_RAFL, FEC_RACC, FEC_RCMR_1, FEC_RCMR_2,
	FEC_DMA_CFG_1, FEC_DMA_CFG_2, FEC_R_DES_ACTIVE_1, FEC_X_DES_ACTIVE_1,
	FEC_R_DES_ACTIVE_2, FEC_X_DES_ACTIVE_2, FEC_QOS_SCHEME,
	RMON_T_DROP, RMON_T_PACKETS, RMON_T_BC_PKT, RMON_T_MC_PKT,
	RMON_T_CRC_ALIGN, RMON_T_UNDERSIZE, RMON_T_OVERSIZE, RMON_T_FRAG,
	RMON_T_JAB, RMON_T_COL, RMON_T_P64, RMON_T_P65TO127, RMON_T_P128TO255,
	RMON_T_P256TO511, RMON_T_P512TO1023, RMON_T_P1024TO2047,
	RMON_T_P_GTE2048, RMON_T_OCTETS,
	IEEE_T_DROP, IEEE_T_FRAME_OK, IEEE_T_1COL, IEEE_T_MCOL, IEEE_T_DEF,
	IEEE_T_LCOL, IEEE_T_EXCOL, IEEE_T_MACERR, IEEE_T_CSERR, IEEE_T_SQE,
	IEEE_T_FDXFC, IEEE_T_OCTETS_OK,
	RMON_R_PACKETS, RMON_R_BC_PKT, RMON_R_MC_PKT, RMON_R_CRC_ALIGN,
	RMON_R_UNDERSIZE, RMON_R_OVERSIZE, RMON_R_FRAG, RMON_R_JAB,
	RMON_R_RESVD_O, RMON_R_P64, RMON_R_P65TO127, RMON_R_P128TO255,
	RMON_R_P256TO511, RMON_R_P512TO1023, RMON_R_P1024TO2047,
	RMON_R_P_GTE2048, RMON_R_OCTETS,
	IEEE_R_DROP, IEEE_R_FRAME_OK, IEEE_R_CRC, IEEE_R_ALIGN, IEEE_R_MACERR,
	IEEE_R_FDXFC, IEEE_R_OCTETS_OK
};
#else

static u32 fec_enet_register_offset[] = {
	FEC_ECNTRL, FEC_IEVENT, FEC_IMASK, FEC_IVEC, FEC_R_DES_ACTIVE_0,
	FEC_R_DES_ACTIVE_1, FEC_R_DES_ACTIVE_2, FEC_X_DES_ACTIVE_0,
	FEC_X_DES_ACTIVE_1, FEC_X_DES_ACTIVE_2, FEC_MII_DATA, FEC_MII_SPEED,
	FEC_R_BOUND, FEC_R_FSTART, FEC_X_WMRK, FEC_X_FSTART, FEC_R_CNTRL,
	FEC_MAX_FRM_LEN, FEC_X_CNTRL, FEC_ADDR_LOW, FEC_ADDR_HIGH,
	FEC_GRP_HASH_TABLE_HIGH, FEC_GRP_HASH_TABLE_LOW, FEC_R_DES_START_0,
	FEC_R_DES_START_1, FEC_R_DES_START_2, FEC_X_DES_START_0,
	FEC_X_DES_START_1, FEC_X_DES_START_2, FEC_R_BUFF_SIZE_0,
	FEC_R_BUFF_SIZE_1, FEC_R_BUFF_SIZE_2
};
#endif



static void fec_enet_get_regs(struct net_device *ndev,
			      struct ethtool_regs *regs, void *regbuf)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	u32 __iomem *theregs = (u32 __iomem *)fep->hwp;
	u32 *buf = (u32 *)regbuf;
	u32 i, off;

	memset(buf, 0, regs->len);

	for (i = 0; i < ARRAY_SIZE(fec_enet_register_offset); i++) {
		off = fec_enet_register_offset[i] / 4;
		buf[off] = readl(&theregs[off]);
	}
}

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Total 111 100.00% 1 100.00%



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);
	}
}

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#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;
}

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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;

	if (pause->rx_pause || pause->autoneg) {
		ndev->phydev->supported |= ADVERTISED_Pause;
		ndev->phydev->advertising |= ADVERTISED_Pause;
	} else {
		ndev->phydev->supported &= ~ADVERTISED_Pause;
		ndev->phydev->advertising &= ~ADVERTISED_Pause;
	}

	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_wake_queue(ndev);
		netif_tx_unlock_bh(ndev);
		napi_enable(&fep->napi);
	}

	return 0;
}

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Total 215 100.00% 5 100.00%


static const struct fec_stat {
	
char name[ETH_GSTRING_LEN];
	
u16 offset;
} 
fec_stats[] = {
	/* RMON TX */
	{ "tx_dropped", RMON_T_DROP },
	{ "tx_packets", RMON_T_PACKETS },
	{ "tx_broadcast", RMON_T_BC_PKT },
	{ "tx_multicast", RMON_T_MC_PKT },
	{ "tx_crc_errors", RMON_T_CRC_ALIGN },
	{ "tx_undersize", RMON_T_UNDERSIZE },
	{ "tx_oversize", RMON_T_OVERSIZE },
	{ "tx_fragment", RMON_T_FRAG },
	{ "tx_jabber", RMON_T_JAB },
	{ "tx_collision", RMON_T_COL },
	{ "tx_64byte", RMON_T_P64 },
	{ "tx_65to127byte", RMON_T_P65TO127 },
	{ "tx_128to255byte", RMON_T_P128TO255 },
	{ "tx_256to511byte", RMON_T_P256TO511 },
	{ "tx_512to1023byte", RMON_T_P512TO1023 },
	{ "tx_1024to2047byte", RMON_T_P1024TO2047 },
	{ "tx_GTE2048byte", RMON_T_P_GTE2048 },
	{ "tx_octets", RMON_T_OCTETS },

	/* IEEE TX */
	{ "IEEE_tx_drop", IEEE_T_DROP },
	{ "IEEE_tx_frame_ok", IEEE_T_FRAME_OK },
	{ "IEEE_tx_1col", IEEE_T_1COL },
	{ "IEEE_tx_mcol", IEEE_T_MCOL },
	{ "IEEE_tx_def", IEEE_T_DEF },
	{ "IEEE_tx_lcol", IEEE_T_LCOL },
	{ "IEEE_tx_excol", IEEE_T_EXCOL },
	{ "IEEE_tx_macerr", IEEE_T_MACERR },
	{ "IEEE_tx_cserr", IEEE_T_CSERR },
	{ "IEEE_tx_sqe", IEEE_T_SQE },
	{ "IEEE_tx_fdxfc", IEEE_T_FDXFC },
	{ "IEEE_tx_octets_ok", IEEE_T_OCTETS_OK },

	/* RMON RX */
	{ "rx_packets", RMON_R_PACKETS },
	{ "rx_broadcast", RMON_R_BC_PKT },
	{ "rx_multicast", RMON_R_MC_PKT },
	{ "rx_crc_errors", RMON_R_CRC_ALIGN },
	{ "rx_undersize", RMON_R_UNDERSIZE },
	{ "rx_oversize", RMON_R_OVERSIZE },
	{ "rx_fragment", RMON_R_FRAG },
	{ "rx_jabber", RMON_R_JAB },
	{ "rx_64byte", RMON_R_P64 },
	{ "rx_65to127byte", RMON_R_P65TO127 },
	{ "rx_128to255byte", RMON_R_P128TO255 },
	{ "rx_256to511byte", RMON_R_P256TO511 },
	{ "rx_512to1023byte", RMON_R_P512TO1023 },
	{ "rx_1024to2047byte", RMON_R_P1024TO2047 },
	{ "rx_GTE2048byte", RMON_R_P_GTE2048 },
	{ "rx_octets", RMON_R_OCTETS },

	/* IEEE RX */
	{ "IEEE_rx_drop", IEEE_R_DROP },
	{ "IEEE_rx_frame_ok", IEEE_R_FRAME_OK },
	{ "IEEE_rx_crc", IEEE_R_CRC },
	{ "IEEE_rx_align", IEEE_R_ALIGN },
	{ "IEEE_rx_macerr", IEEE_R_MACERR },
	{ "IEEE_rx_fdxfc", IEEE_R_FDXFC },
	{ "IEEE_rx_octets_ok", IEEE_R_OCTETS_OK },
};



static void fec_enet_get_ethtool_stats(struct net_device *dev,
	struct ethtool_stats *stats, u64 *data)
{
	struct fec_enet_private *fep = netdev_priv(dev);
	int i;

	for (i = 0; i < ARRAY_SIZE(fec_stats); i++)
		data[i] = readl(fep->hwp + fec_stats[i].offset);
}

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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;
	}
}

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Total 65 100.00% 1 100.00%



static int fec_enet_get_sset_count(struct net_device *dev, int sset)
{
	switch (sset) {
	case ETH_SS_STATS:
		return ARRAY_SIZE(fec_stats);
	default:
		return -EOPNOTSUPP;
	}
}
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#endif /* !defined(CONFIG_M5272) */



static int fec_enet_nway_reset(struct net_device *dev)
{
	struct phy_device *phydev = dev->phydev;

	if (!phydev)
		return -ENODEV;

	return genphy_restart_aneg(phydev);
}

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philippe reynes philippe reynes 2 5.71% 1 50.00%
Total 35 100.00% 2 100.00%

/* 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;
}

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/* Set threshold for interrupt coalescing */


static void fec_enet_itr_coal_set(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	int rx_itr, tx_itr;

	if (!(fep->quirks & FEC_QUIRK_HAS_AVB))
		return;

	/* Must be greater than zero to avoid unpredictable behavior */
	if (!fep->rx_time_itr || !fep->rx_pkts_itr ||
	    !fep->tx_time_itr || !fep->tx_pkts_itr)
		return;

	/* Select enet system clock as Interrupt Coalescing
         * timer Clock Source
         */
	rx_itr = FEC_ITR_CLK_SEL;
	tx_itr = FEC_ITR_CLK_SEL;

	/* set ICFT and ICTT */
	rx_itr |= FEC_ITR_ICFT(fep->rx_pkts_itr);
	rx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr));
	tx_itr |= FEC_ITR_ICFT(fep->tx_pkts_itr);
	tx_itr |= FEC_ITR_ICTT(fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr));

	rx_itr |= FEC_ITR_EN;
	tx_itr |= FEC_ITR_EN;

	writel(tx_itr, fep->hwp + FEC_TXIC0);
	writel(rx_itr, fep->hwp + FEC_RXIC0);
	writel(tx_itr, fep->hwp + FEC_TXIC1);
	writel(rx_itr, fep->hwp + FEC_RXIC1);
	writel(tx_itr, fep->hwp + FEC_TXIC2);
	writel(rx_itr, fep->hwp + FEC_RXIC2);
}

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lothar wassmann lothar wassmann 2 1.04% 1 50.00%
Total 192 100.00% 2 100.00%


static int

fec_enet_get_coalesce(struct net_device *ndev, struct ethtool_coalesce *ec)
{
	struct fec_enet_private *fep = netdev_priv(ndev);

	if (!(fep->quirks & FEC_QUIRK_HAS_AVB))
		return -EOPNOTSUPP;

	ec->rx_coalesce_usecs = fep->rx_time_itr;
	ec->rx_max_coalesced_frames = fep->rx_pkts_itr;

	ec->tx_coalesce_usecs = fep->tx_time_itr;
	ec->tx_max_coalesced_frames = fep->tx_pkts_itr;

	return 0;
}

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Total 76 100.00% 2 100.00%


static int

fec_enet_set_coalesce(struct net_device *ndev, struct ethtool_coalesce *ec)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	unsigned int cycle;

	if (!(fep->quirks & FEC_QUIRK_HAS_AVB))
		return -EOPNOTSUPP;

	if (ec->rx_max_coalesced_frames > 255) {
		pr_err("Rx coalesced frames exceed hardware limitation\n");
		return -EINVAL;
	}

	if (ec->tx_max_coalesced_frames > 255) {
		pr_err("Tx coalesced frame exceed hardware limitation\n");
		return -EINVAL;
	}

	cycle = fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr);
	if (cycle > 0xFFFF) {
		pr_err("Rx coalesced usec exceed hardware limitation\n");
		return -EINVAL;
	}

	cycle = fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr);
	if (cycle > 0xFFFF) {
		pr_err("Rx 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;
}

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Total 179 100.00% 3 100.00%



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);
}

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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;
}

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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;
}

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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;
	}
}

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static int

fec_enet_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
{
	struct fec_enet_private *fep = netdev_priv(ndev);

	if (!(fep->wol_flag & FEC_WOL_HAS_MAGIC_PACKET))
		return -EINVAL;

	if (wol->wolopts & ~WAKE_MAGIC)
		return -EINVAL;

	device_set_wakeup_enable(&ndev->dev, wol->wolopts & WAKE_MAGIC);
	if (device_may_wakeup(&ndev->dev)) {
		fep->wol_flag |= FEC_WOL_FLAG_ENABLE;
		if (fep->irq[0] > 0)
			enable_irq_wake(fep->irq[0]);
	} else {
		fep->wol_flag &= (~FEC_WOL_FLAG_ENABLE);
		if (fep->irq[0] > 0)
			disable_irq_wake(fep->irq[0]);
	}

	return 0;
}

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static const struct ethtool_ops fec_enet_ethtool_ops = {
	.get_drvinfo		= fec_enet_get_drvinfo,
	.get_regs_len		= fec_enet_get_regs_len,
	.get_regs		= fec_enet_get_regs,
	.nway_reset		= fec_enet_nway_reset,
	.get_link		= ethtool_op_get_link,
	.get_coalesce		= fec_enet_get_coalesce,
	.set_coalesce		= fec_enet_set_coalesce,
#ifndef CONFIG_M5272
	.get_pauseparam		= fec_enet_get_pauseparam,
	.set_pauseparam		= fec_enet_set_pauseparam,
	.get_strings		= fec_enet_get_strings,
	.get_ethtool_stats	= fec_enet_get_ethtool_stats,
	.get_sset_count		= fec_enet_get_sset_count,
#endif
	.get_ts_info		= fec_enet_get_ts_info,
	.get_tunable		= fec_enet_get_tunable,
	.set_tunable		= fec_enet_set_tunable,
	.get_wol		= fec_enet_get_wol,
	.set_wol		= fec_enet_set_wol,
	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
};



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) {
		if (cmd == SIOCSHWTSTAMP)
			return fec_ptp_set(ndev, rq);
		if (cmd == SIOCGHWTSTAMP)
			return fec_ptp_get(ndev, rq);
	}

	return phy_mii_ioctl(phydev, rq, cmd);
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 60 57.14% 2 25.00%
ben hutchings ben hutchings 22 20.95% 1 12.50%
frank li frank li 14 13.33% 2 25.00%
alan cox alan cox 5 4.76% 1 12.50%
philippe reynes philippe reynes 2 1.90% 1 12.50%
sascha hauer sascha hauer 2 1.90% 1 12.50%
Total 105 100.00% 8 100.00%



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];
		bdp = txq->bd.base;
		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);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 81 30.80% 2 11.76%
frank li frank li 46 17.49% 2 11.76%
duan fugang* duan fugang* 42 15.97% 3 17.65%
russell king russell king 42 15.97% 2 11.76%
sascha hauer sascha hauer 23 8.75% 2 11.76%
troy kisky troy kisky 16 6.08% 1 5.88%
alan cox alan cox 5 1.90% 1 5.88%
greg ungerer greg ungerer 4 1.52% 2 11.76%
johannes berg johannes berg 3 1.14% 1 5.88%
fabio estevam fabio estevam 1 0.38% 1 5.88%
Total 263 100.00% 17 100.00%



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(NULL,
					  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]);
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 80 55.56% 1 6.25%
uwe kleine-koenig uwe kleine-koenig 22 15.28% 3 18.75%
alan cox alan cox 13 9.03% 1 6.25%
duan fugang* duan fugang* 8 5.56% 3 18.75%
russell king russell king 6 4.17% 1 6.25%
troy kisky troy kisky 3 2.08% 1 6.25%
rob herring rob herring 3 2.08% 1 6.25%
randy dunlap randy dunlap 3 2.08% 1 6.25%
greg ungerer greg ungerer 3 2.08% 1 6.25%
sascha hauer sascha hauer 1 0.69% 1 6.25%
steven king steven king 1 0.69% 1 6.25%
al viro al viro 1 0.69% 1 6.25%
Total 144 100.00% 16 100.00%



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(NULL,
					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;
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 259 93.50% 2 66.67%
troy kisky troy kisky 18 6.50% 1 33.33%
Total 277 100.00% 3 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 182 85.45% 3 37.50%
troy kisky troy kisky 14 6.57% 1 12.50%
johannes berg johannes berg 9 4.23% 1 12.50%
duan fugang* duan fugang* 7 3.29% 2 25.00%
rob herring rob herring 1 0.47% 1 12.50%
Total 213 100.00% 8 100.00%


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;
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 75 38.07% 3 25.00%
rob herring rob herring 41 20.81% 1 8.33%
russell king russell king 23 11.68% 1 8.33%
troy kisky troy kisky 14 7.11% 1 8.33%
uwe kleine-koenig uwe kleine-koenig 14 7.11% 1 8.33%
duan fugang* duan fugang* 13 6.60% 2 16.67%
johannes berg johannes berg 12 6.09% 1 8.33%
alan cox alan cox 4 2.03% 1 8.33%
jim baxter jim baxter 1 0.51% 1 8.33%
Total 197 100.00% 12 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
frank li frank li 84 100.00% 1 100.00%
Total 84 100.00% 1 100.00%


static int

fec_enet_open(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	int ret;

	ret = pm_runtime_get_sync(&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;

	/* 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);

	/* Probe and connect to PHY when open the interface */
	ret = fec_enet_mii_probe(ndev);
	if (ret)
		goto err_enet_mii_probe;

	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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 44 22.56% 5 29.41%
andrew lunn andrew lunn 44 22.56% 1 5.88%
fabio estevam fabio estevam 37 18.97% 2 11.76%
uwe kleine-koenig uwe kleine-koenig 25 12.82% 2 11.76%
alan cox alan cox 18 9.23% 1 5.88%
sascha hauer sascha hauer 9 4.62% 2 11.76%
russell king russell king 8 4.10% 1 5.88%
shawn guo shawn guo 7 3.59% 1 5.88%
philippe reynes philippe reynes 2 1.03% 1 5.88%
greg ungerer greg ungerer 1 0.51% 1 5.88%
Total 195 100.00% 17 100.00%


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);

	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;
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 31 28.97% 1 7.69%
andrew lunn andrew lunn 20 18.69% 1 7.69%
duan fugang* duan fugang* 17 15.89% 2 15.38%
russell king russell king 15 14.02% 3 23.08%
georg hofmann georg hofmann 8 7.48% 1 7.69%
sascha hauer sascha hauer 7 6.54% 3 23.08%
alan cox alan cox 5 4.67% 1 7.69%
philippe reynes philippe reynes 4 3.74% 1 7.69%
Total 107 100.00% 13 100.00%

/* 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 HASH_BITS	6		
/* #bits in hash */

#define CRC32_POLY	0xEDB88320



static void set_multicast_list(struct net_device *ndev)
{
	struct fec_enet_private *fep = netdev_priv(ndev);
	struct netdev_hw_addr *ha;
	unsigned int i, bit, data, crc, tmp;
	unsigned char hash;

	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;
	}

	/* Clear filter and add the addresses in hash register
         */
	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);

	netdev_for_each_mc_addr(ha, ndev) {
		/* calculate crc32 value of mac address */
		crc = 0xffffffff;

		for (i = 0; i < ndev->addr_len; i++) {
			data = ha->addr[i];
			for (bit = 0; bit < 8; bit++, data >>= 1) {
				crc = (crc >> 1) ^
				(((crc ^ data) & 1) ? CRC32_POLY : 0);
			}
		}

		/* only upper 6 bits (HASH_BITS) are used
                 * which point to specific bit in he hash registers
                 */
		hash = (crc >> (32 - HASH_BITS)) & 0x3f;

		if (hash > 31) {
			tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
			tmp |= 1 << (hash - 32);
			writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
		} else {
			tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW);
			tmp |= 1 << hash;
			writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 215 64.95% 1 20.00%
sascha hauer sascha hauer 37 11.18% 1 20.00%
baruch siach baruch siach 29 8.76% 1 20.00%
shawn guo shawn guo 26 7.85% 1 20.00%
alan cox alan cox 24 7.25% 1 20.00%
Total 331 100.00% 5 100.00%

/* 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;
		memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
	}

	/* 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;
}

Contributors
Person Tokens Prop Commits CommitProp
uwe kleine-koenig uwe kleine-koenig 119 73.46% 1 16.67%
sascha hauer sascha hauer 20 12.35% 1 16.67%
duan fugang* duan fugang* 12 7.41% 1 16.67%
lucas stach lucas stach 6 3.70% 1 16.67%
alan cox alan cox 3 1.85% 1 16.67%
matt waddel matt waddel 2 1.23% 1 16.67%
Total 162 100.00% 6 100.00%

#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]);
		}
	}
}
Contributors
Person Tokens Prop Commits CommitProp
xiao jiang xiao jiang 83 98.81% 1 50.00%
wei yongjun wei yongjun 1 1.19% 1 50.00%
Total 84 100.00% 2 100.00%

#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;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
jim baxter jim baxter 64 92.75% 1 33.33%
duan fugang* duan fugang* 4 5.80% 1 33.33%
russell king russell king 1 1.45% 1 33.33%
Total 69 100.00% 3 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 68 63.55% 2 28.57%
jim baxter jim baxter 22 20.56% 1 14.29%
russell king russell king 16 14.95% 3 42.86%
fabio estevam fabio estevam 1 0.93% 1 14.29%
Total 107 100.00% 7 100.00%


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_set_rx_mode	= set_multicast_list,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_tx_timeout		= fec_timeout,
	.ndo_set_mac_address	= fec_set_mac_address,
	.ndo_do_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);

	WARN_ON(dsize != (1 << dsize_log2));
#if defined(CONFIG_ARM)
	fep->rx_align = 0xf;
	fep->tx_align = 0xf;
#else
	fep->rx_align = 0x3;
	fep->tx_align = 0x3;
#endif

	fec_enet_alloc_queue(ndev);

	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) {
		return -ENOMEM;
	}

	memset(cbd_base, 0, bd_size);

	/* Get the Ethernet address */
	fec_get_mac(ndev);
	/* 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_AVB) {
		fep->tx_align = 0;
		fep->rx_align = 0x3f;
	}

	ndev->hw_features = ndev->features;

	fec_restart(ndev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
troy kisky troy kisky 207 33.50% 2 7.69%
frank li frank li 160 25.89% 4 15.38%
duan fugang* duan fugang* 102 16.50% 6 23.08%
uwe kleine-koenig uwe kleine-koenig 54 8.74% 2 7.69%
jim baxter jim baxter 32 5.18% 2 7.69%
alan cox alan cox 19 3.07% 1 3.85%
lucas stach lucas stach 15 2.43% 2 7.69%
shawn guo shawn guo 8 1.29% 1 3.85%
lothar wassmann lothar wassmann 6 0.97% 1 3.85%
sascha hauer sascha hauer 6 0.97% 1 3.85%
philippe de muyter philippe de muyter 3 0.49% 1 3.85%
randy dunlap randy dunlap 3 0.49% 1 3.85%
wolfram sang wolfram sang 2 0.32% 1 3.85%
fabio estevam fabio estevam 1 0.16% 1 3.85%
Total 618 100.00% 26 100.00%

#ifdef CONFIG_OF


static void fec_reset_phy(struct platform_device *pdev)
{
	int err, phy_reset;
	bool active_high = false;
	int msec = 1;
	struct device_node *np = pdev->dev.of_node;

	if (!np)
		return;

	of_property_read_u32(np, "phy-reset-duration", &msec);
	/* A sane reset duration should not be longer than 1s */
	if (msec > 1000)
		msec = 1;

	phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
	if (!gpio_is_valid(phy_reset))
		return;

	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;
	}
	msleep(msec);
	gpio_set_value_cansleep(phy_reset, !active_high);
}
Contributors
Person Tokens Prop Commits CommitProp
shawn guo shawn guo 108 74.48% 4 50.00%
bernhard walle bernhard walle 20 13.79% 2 25.00%
fabio estevam fabio estevam 17 11.72% 2 25.00%
Total 145 100.00% 8 100.00%

#else /* CONFIG_OF */


static void fec_reset_phy(struct platform_device *pdev)
{
	/*
         * In case of platform probe, the reset has been done
         * by machine code.
         */
}
Contributors
Person Tokens Prop Commits CommitProp
shawn guo shawn guo 12 100.00% 2 100.00%
Total 12 100.00% 2 100.00%

#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;
	}

}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 130 96.30% 1 33.33%
frank li frank li 4 2.96% 1 33.33%
sascha hauer sascha hauer 1 0.74% 1 33.33%
Total 135 100.00% 3 100.00%


static int

fec_probe(struct platform_device *pdev)
{
	struct fec_enet_private *fep;
	struct fec_platform_data *pdata;
	struct net_device *ndev;
	int i, irq, ret = 0;
	struct resource *r;
	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;

	fec_enet_get_queue_num(pdev, &num_tx_qs, &num_rx_qs);

	/* Init network device */
	ndev = alloc_etherdev_mqs(sizeof(struct fec_enet_private),
				  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;
	fep->quirks = pdev->id_entry->driver_data;

	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);

	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	fep->hwp = devm_ioremap_resource(&pdev->dev, r);
	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_get_property(np, "fsl,magic-packet", NULL))
		fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET;

	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);
	if (ret < 0) {
		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 = ret;
	}

	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->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;

	fep->reg_phy = devm_regulator_get(&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 {
		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);

	fec_reset_phy(pdev);

	if (fep->bufdesc_ex)
		fec_ptp_init(pdev);

	ret = fec_enet_init(ndev);
	if (ret)
		goto failed_init;

	for (i = 0; i < FEC_IRQ_NUM; i++) {
		irq = platform_get_irq(pdev, i);
		if (irq < 0) {
			if (i)
				break;
			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;
	}

	init_completion(&fep->mdio_done);
	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);

	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);
	if (fep->reg_phy)
		regulator_disable(fep->reg_phy);
failed_regulator:
	clk_disable_unprepare(fep->clk_ipg);
failed_clk_ipg:
	fec_enet_clk_enable(ndev, false);
failed_clk:
failed_phy:
	of_node_put(phy_node);
failed_ioremap:
	free_netdev(ndev);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
sascha hauer sascha hauer 197 18.46% 2 4.17%
duan fugang* duan fugang* 192 17.99% 9 18.75%
fabio estevam fabio estevam 183 17.15% 10 20.83%
uwe kleine-koenig uwe kleine-koenig 87 8.15% 2 4.17%
shawn guo shawn guo 78 7.31% 5 10.42%
andrew lunn andrew lunn 75 7.03% 1 2.08%
frank li frank li 57 5.34% 4 8.33%
lothar wassmann lothar wassmann 47 4.40% 2 4.17%
wolfram sang wolfram sang 30 2.81% 1 2.08%
bryan wu bryan wu 27 2.53% 1 2.08%
tushar behera tushar behera 24 2.25% 1 2.08%
baruch siach baruch siach 23 2.16% 1 2.08%
guenter roeck guenter roeck 14 1.31% 2 4.17%
lucas stach lucas stach 13 1.22% 2 4.17%
hubert feurstein hubert feurstein 6 0.56% 1 2.08%
oskar schirmer oskar schirmer 6 0.56% 1 2.08%
jingoo han jingoo han 4 0.37% 1 2.08%
russell king russell king 3 0.28% 1 2.08%
michael opdenacker michael opdenacker 1 0.09% 1 2.08%
Total 1067 100.00% 48 100.00%


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);

	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);
	of_node_put(fep->phy_node);
	free_netdev(ndev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
sascha hauer sascha hauer 43 52.44% 1 12.50%
fabio estevam fabio estevam 13 15.85% 1 12.50%
uwe kleine-koenig uwe kleine-koenig 7 8.54% 1 12.50%
duan fugang* duan fugang* 6 7.32% 1 12.50%
bryan wu bryan wu 5 6.10% 1 12.50%
lucas stach lucas stach 4 4.88% 1 12.50%
frank li frank li 3 3.66% 1 12.50%
lothar wassmann lothar wassmann 1 1.22% 1 12.50%
Total 82 100.00% 8 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 69 41.57% 5 31.25%
sascha hauer sascha hauer 44 26.51% 2 12.50%
russell king russell king 27 16.27% 3 18.75%
fabio estevam fabio estevam 14 8.43% 2 12.50%
shawn guo shawn guo 6 3.61% 1 6.25%
philippe reynes philippe reynes 2 1.20% 1 6.25%
eric benard eric benard 2 1.20% 1 6.25%
uwe kleine-koenig uwe kleine-koenig 2 1.20% 1 6.25%
Total 166 100.00% 16 100.00%



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);
	struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
	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) {
			if (pdata && pdata->sleep_mode_enable)
				pdata->sleep_mode_enable(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_start(ndev->phydev);
	}
	rtnl_unlock();

	return 0;

failed_clk:
	if (fep->reg_phy)
		regulator_disable(fep->reg_phy);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 123 48.81% 3 16.67%
fabio estevam fabio estevam 56 22.22% 4 22.22%
russell king russell king 31 12.30% 5 27.78%
sascha hauer sascha hauer 23 9.13% 1 5.56%
eric benard eric benard 10 3.97% 2 11.11%
shawn guo shawn guo 5 1.98% 1 5.56%
philippe reynes philippe reynes 2 0.79% 1 5.56%
uwe kleine-koenig uwe kleine-koenig 2 0.79% 1 5.56%
Total 252 100.00% 18 100.00%



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_ipg);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
andrew lunn andrew lunn 42 100.00% 2 100.00%
Total 42 100.00% 2 100.00%



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);

	return clk_prepare_enable(fep->clk_ipg);
}

Contributors
Person Tokens Prop Commits CommitProp
andrew lunn andrew lunn 40 100.00% 1 100.00%
Total 40 100.00% 1 100.00%


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,
        },
	.id_table = fec_devtype,
	.probe	= fec_probe,
	.remove	= fec_drv_remove,
};


module_platform_driver(fec_driver);

MODULE_ALIAS("platform:"DRIVER_NAME);
MODULE_LICENSE("GPL");
Overall Contributors
Person Tokens Prop Commits CommitProp
duan fugang* duan fugang* 5147 29.71% 42 16.15%
frank li frank li 2510 14.49% 13 5.00%
uwe kleine-koenig uwe kleine-koenig 2445 14.11% 10 3.85%
shawn guo shawn guo 768 4.43% 16 6.15%
troy kisky troy kisky 690 3.98% 9 3.46%
russell king russell king 686 3.96% 25 9.62%
sascha hauer sascha hauer 607 3.50% 12 4.62%
chris healy chris healy 583 3.37% 2 0.77%
alan cox alan cox 556 3.21% 2 0.77%
philippe reynes philippe reynes 551 3.18% 4 1.54%
jim baxter jim baxter 451 2.60% 5 1.92%
andrew lunn andrew lunn 356 2.05% 5 1.92%
fabio estevam fabio estevam 347 2.00% 26 10.00%
lothar wassmann lothar wassmann 287 1.66% 9 3.46%
johannes berg johannes berg 175 1.01% 2 0.77%
greg ungerer greg ungerer 163 0.94% 8 3.08%
bryan wu bryan wu 161 0.93% 2 0.77%
lucas stach lucas stach 120 0.69% 7 2.69%
xiao jiang xiao jiang 99 0.57% 1 0.38%
baruch siach baruch siach 57 0.33% 2 0.77%
guenter roeck guenter roeck 49 0.28% 2 0.77%
rob herring rob herring 45 0.26% 1 0.38%
kevin hao kevin hao 45 0.26% 1 0.38%
eric benard eric benard 40 0.23% 3 1.15%
stefan wahren stefan wahren 33 0.19% 1 0.38%
wolfram sang wolfram sang 32 0.18% 2 0.77%
jingchang lu jingchang lu 26 0.15% 1 0.38%
jiri pirko jiri pirko 25 0.14% 2 0.77%
tushar behera tushar behera 24 0.14% 1 0.38%
ben hutchings ben hutchings 23 0.13% 2 0.77%
joe perches joe perches 22 0.13% 1 0.38%
sebastian andrzej siewior sebastian andrzej siewior 21 0.12% 4 1.54%
bernhard walle bernhard walle 20 0.12% 2 0.77%
markus pargmann markus pargmann 18 0.10% 1 0.38%
randy dunlap randy dunlap 17 0.10% 1 0.38%
fabian frederick fabian frederick 14 0.08% 1 0.38%
christoph muellner christoph muellner 10 0.06% 1 0.38%
georg hofmann georg hofmann 8 0.05% 1 0.38%
matt waddel matt waddel 8 0.05% 1 0.38%
jingoo han jingoo han 8 0.05% 1 0.38%
philipp zabel philipp zabel 6 0.03% 1 0.38%
hubert feurstein hubert feurstein 6 0.03% 1 0.38%
florian fainelli florian fainelli 6 0.03% 2 0.77%
oskar schirmer oskar schirmer 6 0.03% 1 0.38%
eric dumazet eric dumazet 5 0.03% 1 0.38%
maciej s. szmigiero maciej s. szmigiero 5 0.03% 1 0.38%
stefan agner stefan agner 5 0.03% 1 0.38%
luwei zhou luwei zhou 5 0.03% 1 0.38%
richard zhao richard zhao 4 0.02% 1 0.38%
colin king colin king 4 0.02% 1 0.38%
dan carpenter dan carpenter 4 0.02% 1 0.38%
philippe de muyter philippe de muyter 3 0.02% 1 0.38%
richard cochran richard cochran 3 0.02% 2 0.77%
rickard strandqvist rickard strandqvist 2 0.01% 1 0.38%
denis kirjanov denis kirjanov 2 0.01% 1 0.38%
al viro al viro 1 0.01% 1 0.38%
wei yongjun wei yongjun 1 0.01% 1 0.38%
stephen hemminger stephen hemminger 1 0.01% 1 0.38%
rogerio pimentel rogerio pimentel 1 0.01% 1 0.38%
david s. miller david s. miller 1 0.01% 1 0.38%
axel lin axel lin 1 0.01% 1 0.38%
steven king steven king 1 0.01% 1 0.38%
michael opdenacker michael opdenacker 1 0.01% 1 0.38%
patrick mchardy patrick mchardy 1 0.01% 1 0.38%
adrian bunk adrian bunk 1 0.01% 1 0.38%
andrew morton andrew morton 1 0.01% 1 0.38%
Total 17324 100.00% 260 100.00%
  Directory: drivers/net/ethernet/freescale

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
frank li	frank li	23	46.94%	1	33.33%
troy kisky	troy kisky	14	28.57%	1	33.33%
duan fugang*	duan fugang*	12	24.49%	1	33.33%
	Total	49	100.00%	3	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/net/ethernet/freescale/fec_main.c

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