Release 4.17 drivers/net/ethernet/socionext/netsec.c

Directory: drivers/net/ethernet/socionext
// SPDX-License-Identifier: GPL-2.0+

#include <linux/types.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/acpi.h>
#include <linux/of_mdio.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/io.h>

#include <net/tcp.h>
#include <net/ip6_checksum.h>


#define NETSEC_REG_SOFT_RST			0x104

#define NETSEC_REG_COM_INIT			0x120


#define NETSEC_REG_TOP_STATUS			0x200

#define NETSEC_IRQ_RX				BIT(1)

#define NETSEC_IRQ_TX				BIT(0)


#define NETSEC_REG_TOP_INTEN			0x204

#define NETSEC_REG_INTEN_SET			0x234

#define NETSEC_REG_INTEN_CLR			0x238


#define NETSEC_REG_NRM_TX_STATUS		0x400

#define NETSEC_REG_NRM_TX_INTEN			0x404

#define NETSEC_REG_NRM_TX_INTEN_SET		0x428

#define NETSEC_REG_NRM_TX_INTEN_CLR		0x42c

#define NRM_TX_ST_NTOWNR	BIT(17)

#define NRM_TX_ST_TR_ERR	BIT(16)

#define NRM_TX_ST_TXDONE	BIT(15)

#define NRM_TX_ST_TMREXP	BIT(14)


#define NETSEC_REG_NRM_RX_STATUS		0x440

#define NETSEC_REG_NRM_RX_INTEN			0x444

#define NETSEC_REG_NRM_RX_INTEN_SET		0x468

#define NETSEC_REG_NRM_RX_INTEN_CLR		0x46c

#define NRM_RX_ST_RC_ERR	BIT(16)

#define NRM_RX_ST_PKTCNT	BIT(15)

#define NRM_RX_ST_TMREXP	BIT(14)


#define NETSEC_REG_PKT_CMD_BUF			0xd0


#define NETSEC_REG_CLK_EN			0x100


#define NETSEC_REG_PKT_CTRL			0x140


#define NETSEC_REG_DMA_TMR_CTRL			0x20c

#define NETSEC_REG_F_TAIKI_MC_VER		0x22c

#define NETSEC_REG_F_TAIKI_VER			0x230

#define NETSEC_REG_DMA_HM_CTRL			0x214

#define NETSEC_REG_DMA_MH_CTRL			0x220

#define NETSEC_REG_ADDR_DIS_CORE		0x218

#define NETSEC_REG_DMAC_HM_CMD_BUF		0x210

#define NETSEC_REG_DMAC_MH_CMD_BUF		0x21c


#define NETSEC_REG_NRM_TX_PKTCNT		0x410


#define NETSEC_REG_NRM_TX_DONE_PKTCNT		0x414

#define NETSEC_REG_NRM_TX_DONE_TXINT_PKTCNT	0x418


#define NETSEC_REG_NRM_TX_TMR			0x41c


#define NETSEC_REG_NRM_RX_PKTCNT		0x454

#define NETSEC_REG_NRM_RX_RXINT_PKTCNT		0x458

#define NETSEC_REG_NRM_TX_TXINT_TMR		0x420

#define NETSEC_REG_NRM_RX_RXINT_TMR		0x460


#define NETSEC_REG_NRM_RX_TMR			0x45c


#define NETSEC_REG_NRM_TX_DESC_START_UP		0x434

#define NETSEC_REG_NRM_TX_DESC_START_LW		0x408

#define NETSEC_REG_NRM_RX_DESC_START_UP		0x474

#define NETSEC_REG_NRM_RX_DESC_START_LW		0x448


#define NETSEC_REG_NRM_TX_CONFIG		0x430

#define NETSEC_REG_NRM_RX_CONFIG		0x470


#define MAC_REG_STATUS				0x1024

#define MAC_REG_DATA				0x11c0

#define MAC_REG_CMD				0x11c4

#define MAC_REG_FLOW_TH				0x11cc

#define MAC_REG_INTF_SEL			0x11d4

#define MAC_REG_DESC_INIT			0x11fc

#define MAC_REG_DESC_SOFT_RST			0x1204

#define NETSEC_REG_MODE_TRANS_COMP_STATUS	0x500


#define GMAC_REG_MCR				0x0000

#define GMAC_REG_MFFR				0x0004

#define GMAC_REG_GAR				0x0010

#define GMAC_REG_GDR				0x0014

#define GMAC_REG_FCR				0x0018

#define GMAC_REG_BMR				0x1000

#define GMAC_REG_RDLAR				0x100c

#define GMAC_REG_TDLAR				0x1010

#define GMAC_REG_OMR				0x1018


#define MHZ(n)		((n) * 1000 * 1000)


#define NETSEC_TX_SHIFT_OWN_FIELD		31

#define NETSEC_TX_SHIFT_LD_FIELD		30

#define NETSEC_TX_SHIFT_DRID_FIELD		24

#define NETSEC_TX_SHIFT_PT_FIELD		21

#define NETSEC_TX_SHIFT_TDRID_FIELD		16

#define NETSEC_TX_SHIFT_CC_FIELD		15

#define NETSEC_TX_SHIFT_FS_FIELD		9

#define NETSEC_TX_LAST				8

#define NETSEC_TX_SHIFT_CO			7

#define NETSEC_TX_SHIFT_SO			6

#define NETSEC_TX_SHIFT_TRS_FIELD		4


#define NETSEC_RX_PKT_OWN_FIELD			31

#define NETSEC_RX_PKT_LD_FIELD			30

#define NETSEC_RX_PKT_SDRID_FIELD		24

#define NETSEC_RX_PKT_FR_FIELD			23

#define NETSEC_RX_PKT_ER_FIELD			21

#define NETSEC_RX_PKT_ERR_FIELD			16

#define NETSEC_RX_PKT_TDRID_FIELD		12

#define NETSEC_RX_PKT_FS_FIELD			9

#define NETSEC_RX_PKT_LS_FIELD			8

#define NETSEC_RX_PKT_CO_FIELD			6


#define NETSEC_RX_PKT_ERR_MASK			3


#define NETSEC_MAX_TX_PKT_LEN			1518

#define NETSEC_MAX_TX_JUMBO_PKT_LEN		9018


#define NETSEC_RING_GMAC			15

#define NETSEC_RING_MAX				2


#define NETSEC_TCP_SEG_LEN_MAX			1460

#define NETSEC_TCP_JUMBO_SEG_LEN_MAX		8960


#define NETSEC_RX_CKSUM_NOTAVAIL		0

#define NETSEC_RX_CKSUM_OK			1

#define NETSEC_RX_CKSUM_NG			2


#define NETSEC_TOP_IRQ_REG_CODE_LOAD_END	BIT(20)

#define NETSEC_IRQ_TRANSITION_COMPLETE		BIT(4)


#define NETSEC_MODE_TRANS_COMP_IRQ_N2T		BIT(20)

#define NETSEC_MODE_TRANS_COMP_IRQ_T2N		BIT(19)


#define NETSEC_INT_PKTCNT_MAX			2047


#define NETSEC_FLOW_START_TH_MAX		95

#define NETSEC_FLOW_STOP_TH_MAX			95

#define NETSEC_FLOW_PAUSE_TIME_MIN		5


#define NETSEC_CLK_EN_REG_DOM_ALL		0x3f


#define NETSEC_PKT_CTRL_REG_MODE_NRM		BIT(28)

#define NETSEC_PKT_CTRL_REG_EN_JUMBO		BIT(27)

#define NETSEC_PKT_CTRL_REG_LOG_CHKSUM_ER	BIT(3)

#define NETSEC_PKT_CTRL_REG_LOG_HD_INCOMPLETE	BIT(2)

#define NETSEC_PKT_CTRL_REG_LOG_HD_ER		BIT(1)

#define NETSEC_PKT_CTRL_REG_DRP_NO_MATCH	BIT(0)


#define NETSEC_CLK_EN_REG_DOM_G			BIT(5)

#define NETSEC_CLK_EN_REG_DOM_C			BIT(1)

#define NETSEC_CLK_EN_REG_DOM_D			BIT(0)


#define NETSEC_COM_INIT_REG_DB			BIT(2)

#define NETSEC_COM_INIT_REG_CLS			BIT(1)

#define NETSEC_COM_INIT_REG_ALL			(NETSEC_COM_INIT_REG_CLS | \
                                                 NETSEC_COM_INIT_REG_DB)


#define NETSEC_SOFT_RST_REG_RESET		0

#define NETSEC_SOFT_RST_REG_RUN			BIT(31)


#define NETSEC_DMA_CTRL_REG_STOP		1

#define MH_CTRL__MODE_TRANS			BIT(20)


#define NETSEC_GMAC_CMD_ST_READ			0

#define NETSEC_GMAC_CMD_ST_WRITE		BIT(28)

#define NETSEC_GMAC_CMD_ST_BUSY			BIT(31)


#define NETSEC_GMAC_BMR_REG_COMMON		0x00412080

#define NETSEC_GMAC_BMR_REG_RESET		0x00020181

#define NETSEC_GMAC_BMR_REG_SWR			0x00000001


#define NETSEC_GMAC_OMR_REG_ST			BIT(13)

#define NETSEC_GMAC_OMR_REG_SR			BIT(1)


#define NETSEC_GMAC_MCR_REG_IBN			BIT(30)

#define NETSEC_GMAC_MCR_REG_CST			BIT(25)

#define NETSEC_GMAC_MCR_REG_JE			BIT(20)

#define NETSEC_MCR_PS				BIT(15)

#define NETSEC_GMAC_MCR_REG_FES			BIT(14)

#define NETSEC_GMAC_MCR_REG_FULL_DUPLEX_COMMON	0x0000280c

#define NETSEC_GMAC_MCR_REG_HALF_DUPLEX_COMMON	0x0001a00c


#define NETSEC_FCR_RFE				BIT(2)

#define NETSEC_FCR_TFE				BIT(1)


#define NETSEC_GMAC_GAR_REG_GW			BIT(1)

#define NETSEC_GMAC_GAR_REG_GB			BIT(0)


#define NETSEC_GMAC_GAR_REG_SHIFT_PA		11

#define NETSEC_GMAC_GAR_REG_SHIFT_GR		6

#define GMAC_REG_SHIFT_CR_GAR			2


#define NETSEC_GMAC_GAR_REG_CR_25_35_MHZ	2

#define NETSEC_GMAC_GAR_REG_CR_35_60_MHZ	3

#define NETSEC_GMAC_GAR_REG_CR_60_100_MHZ	0

#define NETSEC_GMAC_GAR_REG_CR_100_150_MHZ	1

#define NETSEC_GMAC_GAR_REG_CR_150_250_MHZ	4

#define NETSEC_GMAC_GAR_REG_CR_250_300_MHZ	5


#define NETSEC_GMAC_RDLAR_REG_COMMON		0x18000

#define NETSEC_GMAC_TDLAR_REG_COMMON		0x1c000


#define NETSEC_REG_NETSEC_VER_F_TAIKI		0x50000


#define NETSEC_REG_DESC_RING_CONFIG_CFG_UP	BIT(31)

#define NETSEC_REG_DESC_RING_CONFIG_CH_RST	BIT(30)

#define NETSEC_REG_DESC_TMR_MODE		4

#define NETSEC_REG_DESC_ENDIAN			0


#define NETSEC_MAC_DESC_SOFT_RST_SOFT_RST	1

#define NETSEC_MAC_DESC_INIT_REG_INIT		1


#define NETSEC_EEPROM_MAC_ADDRESS		0x00

#define NETSEC_EEPROM_HM_ME_ADDRESS_H		0x08

#define NETSEC_EEPROM_HM_ME_ADDRESS_L		0x0C

#define NETSEC_EEPROM_HM_ME_SIZE		0x10

#define NETSEC_EEPROM_MH_ME_ADDRESS_H		0x14

#define NETSEC_EEPROM_MH_ME_ADDRESS_L		0x18

#define NETSEC_EEPROM_MH_ME_SIZE		0x1C

#define NETSEC_EEPROM_PKT_ME_ADDRESS		0x20

#define NETSEC_EEPROM_PKT_ME_SIZE		0x24


#define DESC_NUM	128

#define NAPI_BUDGET	(DESC_NUM / 2)


#define DESC_SZ	sizeof(struct netsec_de)


#define NETSEC_F_NETSEC_VER_MAJOR_NUM(x)	((x) & 0xffff0000)


enum ring_id {
	
NETSEC_RING_TX = 0,
	
NETSEC_RING_RX
};


struct netsec_desc {
	
struct sk_buff *skb;
	
dma_addr_t dma_addr;
	
void *addr;
	
u16 len;
};


struct netsec_desc_ring {
	
dma_addr_t desc_dma;
	
struct netsec_desc *desc;
	
void *vaddr;
	
u16 pkt_cnt;
	

u16 head, tail;
};


struct netsec_priv {
	
struct netsec_desc_ring desc_ring[NETSEC_RING_MAX];
	
struct ethtool_coalesce et_coalesce;
	
spinlock_t reglock; /* protect reg access */
	
struct napi_struct napi;
	
phy_interface_t phy_interface;
	
struct net_device *ndev;
	
struct device_node *phy_np;
	
struct phy_device *phydev;
	
struct mii_bus *mii_bus;
	
void __iomem *ioaddr;
	
void __iomem *eeprom_base;
	
struct device *dev;
	
struct clk *clk;
	
u32 msg_enable;
	
u32 freq;
	
bool rx_cksum_offload_flag;
};


struct netsec_de { /* Netsec Descriptor layout */
	
u32 attr;
	
u32 data_buf_addr_up;
	
u32 data_buf_addr_lw;
	
u32 buf_len_info;
};


struct netsec_tx_pkt_ctrl {
	
u16 tcp_seg_len;
	
bool tcp_seg_offload_flag;
	
bool cksum_offload_flag;
};


struct netsec_rx_pkt_info {
	
int rx_cksum_result;
	
int err_code;
	
bool err_flag;
};



static void netsec_write(struct netsec_priv *priv, u32 reg_addr, u32 val)
{
	writel(val, priv->ioaddr + reg_addr);
}

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static u32 netsec_read(struct netsec_priv *priv, u32 reg_addr)
{
	return readl(priv->ioaddr + reg_addr);
}

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/************* MDIO BUS OPS FOLLOW *************/


#define TIMEOUT_SPINS_MAC		1000

#define TIMEOUT_SECONDARY_MS_MAC	100



static u32 netsec_clk_type(u32 freq)
{
	if (freq < MHZ(35))
		return NETSEC_GMAC_GAR_REG_CR_25_35_MHZ;
	if (freq < MHZ(60))
		return NETSEC_GMAC_GAR_REG_CR_35_60_MHZ;
	if (freq < MHZ(100))
		return NETSEC_GMAC_GAR_REG_CR_60_100_MHZ;
	if (freq < MHZ(150))
		return NETSEC_GMAC_GAR_REG_CR_100_150_MHZ;
	if (freq < MHZ(250))
		return NETSEC_GMAC_GAR_REG_CR_150_250_MHZ;

	return NETSEC_GMAC_GAR_REG_CR_250_300_MHZ;
}

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static int netsec_wait_while_busy(struct netsec_priv *priv, u32 addr, u32 mask)
{
	u32 timeout = TIMEOUT_SPINS_MAC;

	while (--timeout && netsec_read(priv, addr) & mask)
		cpu_relax();
	if (timeout)
		return 0;

	timeout = TIMEOUT_SECONDARY_MS_MAC;
	while (--timeout && netsec_read(priv, addr) & mask)
		usleep_range(1000, 2000);

	if (timeout)
		return 0;

	netdev_WARN(priv->ndev, "%s: timeout\n", __func__);

	return -ETIMEDOUT;
}

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static int netsec_mac_write(struct netsec_priv *priv, u32 addr, u32 value)
{
	netsec_write(priv, MAC_REG_DATA, value);
	netsec_write(priv, MAC_REG_CMD, addr | NETSEC_GMAC_CMD_ST_WRITE);
	return netsec_wait_while_busy(priv,
				      MAC_REG_CMD, NETSEC_GMAC_CMD_ST_BUSY);
}

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static int netsec_mac_read(struct netsec_priv *priv, u32 addr, u32 *read)
{
	int ret;

	netsec_write(priv, MAC_REG_CMD, addr | NETSEC_GMAC_CMD_ST_READ);
	ret = netsec_wait_while_busy(priv,
				     MAC_REG_CMD, NETSEC_GMAC_CMD_ST_BUSY);
	if (ret)
		return ret;

	*read = netsec_read(priv, MAC_REG_DATA);

	return 0;
}

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static int netsec_mac_wait_while_busy(struct netsec_priv *priv,
				      u32 addr, u32 mask)
{
	u32 timeout = TIMEOUT_SPINS_MAC;
	int ret, data;

	do {
		ret = netsec_mac_read(priv, addr, &data);
		if (ret)
			break;
		cpu_relax();
	} while (--timeout && (data & mask));

	if (timeout)
		return 0;

	timeout = TIMEOUT_SECONDARY_MS_MAC;
	do {
		usleep_range(1000, 2000);

		ret = netsec_mac_read(priv, addr, &data);
		if (ret)
			break;
		cpu_relax();
	} while (--timeout && (data & mask));

	if (timeout && !ret)
		return 0;

	netdev_WARN(priv->ndev, "%s: timeout\n", __func__);

	return -ETIMEDOUT;
}

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static int netsec_mac_update_to_phy_state(struct netsec_priv *priv)
{
	struct phy_device *phydev = priv->ndev->phydev;
	u32 value = 0;

	value = phydev->duplex ? NETSEC_GMAC_MCR_REG_FULL_DUPLEX_COMMON :
				 NETSEC_GMAC_MCR_REG_HALF_DUPLEX_COMMON;

	if (phydev->speed != SPEED_1000)
		value |= NETSEC_MCR_PS;

	if (priv->phy_interface != PHY_INTERFACE_MODE_GMII &&
	    phydev->speed == SPEED_100)
		value |= NETSEC_GMAC_MCR_REG_FES;

	value |= NETSEC_GMAC_MCR_REG_CST | NETSEC_GMAC_MCR_REG_JE;

	if (phy_interface_mode_is_rgmii(priv->phy_interface))
		value |= NETSEC_GMAC_MCR_REG_IBN;

	if (netsec_mac_write(priv, GMAC_REG_MCR, value))
		return -ETIMEDOUT;

	return 0;
}

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static int netsec_phy_write(struct mii_bus *bus,
			    int phy_addr, int reg, u16 val)
{
	struct netsec_priv *priv = bus->priv;

	if (netsec_mac_write(priv, GMAC_REG_GDR, val))
		return -ETIMEDOUT;
	if (netsec_mac_write(priv, GMAC_REG_GAR,
			     phy_addr << NETSEC_GMAC_GAR_REG_SHIFT_PA |
			     reg << NETSEC_GMAC_GAR_REG_SHIFT_GR |
			     NETSEC_GMAC_GAR_REG_GW | NETSEC_GMAC_GAR_REG_GB |
			     (netsec_clk_type(priv->freq) <<
			      GMAC_REG_SHIFT_CR_GAR)))
		return -ETIMEDOUT;

	return netsec_mac_wait_while_busy(priv, GMAC_REG_GAR,
					  NETSEC_GMAC_GAR_REG_GB);
}

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static int netsec_phy_read(struct mii_bus *bus, int phy_addr, int reg_addr)
{
	struct netsec_priv *priv = bus->priv;
	u32 data;
	int ret;

	if (netsec_mac_write(priv, GMAC_REG_GAR, NETSEC_GMAC_GAR_REG_GB |
			     phy_addr << NETSEC_GMAC_GAR_REG_SHIFT_PA |
			     reg_addr << NETSEC_GMAC_GAR_REG_SHIFT_GR |
			     (netsec_clk_type(priv->freq) <<
			      GMAC_REG_SHIFT_CR_GAR)))
		return -ETIMEDOUT;

	ret = netsec_mac_wait_while_busy(priv, GMAC_REG_GAR,
					 NETSEC_GMAC_GAR_REG_GB);
	if (ret)
		return ret;

	ret = netsec_mac_read(priv, GMAC_REG_GDR, &data);
	if (ret)
		return ret;

	return data;
}

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/************* ETHTOOL_OPS FOLLOW *************/



static void netsec_et_get_drvinfo(struct net_device *net_device,
				  struct ethtool_drvinfo *info)
{
	strlcpy(info->driver, "netsec", sizeof(info->driver));
	strlcpy(info->bus_info, dev_name(net_device->dev.parent),
		sizeof(info->bus_info));
}

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static int netsec_et_get_coalesce(struct net_device *net_device,
				  struct ethtool_coalesce *et_coalesce)
{
	struct netsec_priv *priv = netdev_priv(net_device);

	*et_coalesce = priv->et_coalesce;

	return 0;
}

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static int netsec_et_set_coalesce(struct net_device *net_device,
				  struct ethtool_coalesce *et_coalesce)
{
	struct netsec_priv *priv = netdev_priv(net_device);

	priv->et_coalesce = *et_coalesce;

	if (priv->et_coalesce.tx_coalesce_usecs < 50)
		priv->et_coalesce.tx_coalesce_usecs = 50;
	if (priv->et_coalesce.tx_max_coalesced_frames < 1)
		priv->et_coalesce.tx_max_coalesced_frames = 1;

	netsec_write(priv, NETSEC_REG_NRM_TX_DONE_TXINT_PKTCNT,
		     priv->et_coalesce.tx_max_coalesced_frames);
	netsec_write(priv, NETSEC_REG_NRM_TX_TXINT_TMR,
		     priv->et_coalesce.tx_coalesce_usecs);
	netsec_write(priv, NETSEC_REG_NRM_TX_INTEN_SET, NRM_TX_ST_TXDONE);
	netsec_write(priv, NETSEC_REG_NRM_TX_INTEN_SET, NRM_TX_ST_TMREXP);

	if (priv->et_coalesce.rx_coalesce_usecs < 50)
		priv->et_coalesce.rx_coalesce_usecs = 50;
	if (priv->et_coalesce.rx_max_coalesced_frames < 1)
		priv->et_coalesce.rx_max_coalesced_frames = 1;

	netsec_write(priv, NETSEC_REG_NRM_RX_RXINT_PKTCNT,
		     priv->et_coalesce.rx_max_coalesced_frames);
	netsec_write(priv, NETSEC_REG_NRM_RX_RXINT_TMR,
		     priv->et_coalesce.rx_coalesce_usecs);
	netsec_write(priv, NETSEC_REG_NRM_RX_INTEN_SET, NRM_RX_ST_PKTCNT);
	netsec_write(priv, NETSEC_REG_NRM_RX_INTEN_SET, NRM_RX_ST_TMREXP);

	return 0;
}

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static u32 netsec_et_get_msglevel(struct net_device *dev)
{
	struct netsec_priv *priv = netdev_priv(dev);

	return priv->msg_enable;
}

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static void netsec_et_set_msglevel(struct net_device *dev, u32 datum)
{
	struct netsec_priv *priv = netdev_priv(dev);

	priv->msg_enable = datum;
}

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static const struct ethtool_ops netsec_ethtool_ops = {
	.get_drvinfo		= netsec_et_get_drvinfo,
	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
	.get_link		= ethtool_op_get_link,
	.get_coalesce		= netsec_et_get_coalesce,
	.set_coalesce		= netsec_et_set_coalesce,
	.get_msglevel		= netsec_et_get_msglevel,
	.set_msglevel		= netsec_et_set_msglevel,
};

/************* NETDEV_OPS FOLLOW *************/



static struct sk_buff *netsec_alloc_skb(struct netsec_priv *priv,
					struct netsec_desc *desc)
{
	struct sk_buff *skb;

	if (device_get_dma_attr(priv->dev) == DEV_DMA_COHERENT) {
		skb = netdev_alloc_skb_ip_align(priv->ndev, desc->len);
	} else {
		desc->len = L1_CACHE_ALIGN(desc->len);
		skb = netdev_alloc_skb(priv->ndev, desc->len);
	}
	if (!skb)
		return NULL;

	desc->addr = skb->data;
	desc->dma_addr = dma_map_single(priv->dev, desc->addr, desc->len,
					DMA_FROM_DEVICE);
	if (dma_mapping_error(priv->dev, desc->dma_addr)) {
		dev_kfree_skb_any(skb);
		return NULL;
	}
	return skb;
}

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static void netsec_set_rx_de(struct netsec_priv *priv,
			     struct netsec_desc_ring *dring, u16 idx,
			     const struct netsec_desc *desc,
			     struct sk_buff *skb)
{
	struct netsec_de *de = dring->vaddr + DESC_SZ * idx;
	u32 attr = (1 << NETSEC_RX_PKT_OWN_FIELD) |
		   (1 << NETSEC_RX_PKT_FS_FIELD) |
		   (1 << NETSEC_RX_PKT_LS_FIELD);

	if (idx == DESC_NUM - 1)
		attr |= (1 << NETSEC_RX_PKT_LD_FIELD);

	de->data_buf_addr_up = upper_32_bits(desc->dma_addr);
	de->data_buf_addr_lw = lower_32_bits(desc->dma_addr);
	de->buf_len_info = desc->len;
	de->attr = attr;
	dma_wmb();

	dring->desc[idx].dma_addr = desc->dma_addr;
	dring->desc[idx].addr = desc->addr;
	dring->desc[idx].len = desc->len;
	dring->desc[idx].skb = skb;
}

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static struct sk_buff *netsec_get_rx_de(struct netsec_priv *priv,
					struct netsec_desc_ring *dring,
					u16 idx,
					struct netsec_rx_pkt_info *rxpi,
					struct netsec_desc *desc, u16 *len)
{
	struct netsec_de de = {};

	memcpy(&de, dring->vaddr + DESC_SZ * idx, DESC_SZ);

	*len = de.buf_len_info >> 16;

	rxpi->err_flag = (de.attr >> NETSEC_RX_PKT_ER_FIELD) & 1;
	rxpi->rx_cksum_result = (de.attr >> NETSEC_RX_PKT_CO_FIELD) & 3;
	rxpi->err_code = (de.attr >> NETSEC_RX_PKT_ERR_FIELD) &
							NETSEC_RX_PKT_ERR_MASK;
	*desc = dring->desc[idx];
	return desc->skb;
}

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Total 123 100.00% 1 100.00%



static struct sk_buff *netsec_get_rx_pkt_data(struct netsec_priv *priv,
					      struct netsec_rx_pkt_info *rxpi,
					      struct netsec_desc *desc,
					      u16 *len)
{
	struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX];
	struct sk_buff *tmp_skb, *skb = NULL;
	struct netsec_desc td;
	int tail;

	*rxpi = (struct netsec_rx_pkt_info){};

	td.len = priv->ndev->mtu + 22;

	tmp_skb = netsec_alloc_skb(priv, &td);

	dma_rmb();

	tail = dring->tail;

	if (!tmp_skb) {
		netsec_set_rx_de(priv, dring, tail, &dring->desc[tail],
				 dring->desc[tail].skb);
	} else {
		skb = netsec_get_rx_de(priv, dring, tail, rxpi, desc, len);
		netsec_set_rx_de(priv, dring, tail, &td, tmp_skb);
	}

	/* move tail ahead */
	dring->tail = (dring->tail + 1) % DESC_NUM;

	dring->pkt_cnt--;

	return skb;
}

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static int netsec_clean_tx_dring(struct netsec_priv *priv, int budget)
{
	struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_TX];
	unsigned int pkts, bytes;

	dring->pkt_cnt += netsec_read(priv, NETSEC_REG_NRM_TX_DONE_PKTCNT);

	if (dring->pkt_cnt < budget)
		budget = dring->pkt_cnt;

	pkts = 0;
	bytes = 0;

	while (pkts < budget) {
		struct netsec_desc *desc;
		struct netsec_de *entry;
		int tail, eop;

		tail = dring->tail;

		/* move tail ahead */
		dring->tail = (tail + 1) % DESC_NUM;

		desc = &dring->desc[tail];
		entry = dring->vaddr + DESC_SZ * tail;

		eop = (entry->attr >> NETSEC_TX_LAST) & 1;

		dma_unmap_single(priv->dev, desc->dma_addr, desc->len,
				 DMA_TO_DEVICE);
		if (eop) {
			pkts++;
			bytes += desc->skb->len;
			dev_kfree_skb(desc->skb);
		}
		*desc = (struct netsec_desc){};
	}
	dring->pkt_cnt -= budget;

	priv->ndev->stats.tx_packets += budget;
	priv->ndev->stats.tx_bytes += bytes;

	netdev_completed_queue(priv->ndev, budget, bytes);

	return budget;
}

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static int netsec_process_tx(struct netsec_priv *priv, int budget)
{
	struct net_device *ndev = priv->ndev;
	int new, done = 0;

	do {
		new = netsec_clean_tx_dring(priv, budget);
		done += new;
		budget -= new;
	} while (new);

	if (done && netif_queue_stopped(ndev))
		netif_wake_queue(ndev);

	return done;
}

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static int netsec_process_rx(struct netsec_priv *priv, int budget)
{
	struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX];
	struct net_device *ndev = priv->ndev;
	struct netsec_rx_pkt_info rx_info;
	int done = 0, rx_num = 0;
	struct netsec_desc desc;
	struct sk_buff *skb;
	u16 len;

	while (done < budget) {
		if (!rx_num) {
			rx_num = netsec_read(priv, NETSEC_REG_NRM_RX_PKTCNT);
			dring->pkt_cnt += rx_num;

			/* move head 'rx_num' */
			dring->head = (dring->head + rx_num) % DESC_NUM;

			rx_num = dring->pkt_cnt;
			if (!rx_num)
				break;
		}
		done++;
		rx_num--;
		skb = netsec_get_rx_pkt_data(priv, &rx_info, &desc, &len);
		if (unlikely(!skb) || rx_info.err_flag) {
			netif_err(priv, drv, priv->ndev,
				  "%s: rx fail err(%d)\n",
				  __func__, rx_info.err_code);
			ndev->stats.rx_dropped++;
			continue;
		}

		dma_unmap_single(priv->dev, desc.dma_addr, desc.len,
				 DMA_FROM_DEVICE);
		skb_put(skb, len);
		skb->protocol = eth_type_trans(skb, priv->ndev);

		if (priv->rx_cksum_offload_flag &&
		    rx_info.rx_cksum_result == NETSEC_RX_CKSUM_OK)
			skb->ip_summed = CHECKSUM_UNNECESSARY;

		if (napi_gro_receive(&priv->napi, skb) != GRO_DROP) {
			ndev->stats.rx_packets++;
			ndev->stats.rx_bytes += len;
		}
	}

	return done;
}

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static int netsec_napi_poll(struct napi_struct *napi, int budget)
{
	struct netsec_priv *priv;
	struct net_device *ndev;
	int tx, rx, done, todo;

	priv = container_of(napi, struct netsec_priv, napi);
	ndev = priv->ndev;

	todo = budget;
	do {
		if (!todo)
			break;

		tx = netsec_process_tx(priv, todo);
		todo -= tx;

		if (!todo)
			break;

		rx = netsec_process_rx(priv, todo);
		todo -= rx;
	} while (rx || tx);

	done = budget - todo;

	if (done < budget && napi_complete_done(napi, done)) {
		unsigned long flags;

		spin_lock_irqsave(&priv->reglock, flags);
		netsec_write(priv, NETSEC_REG_INTEN_SET,
			     NETSEC_IRQ_RX | NETSEC_IRQ_TX);
		spin_unlock_irqrestore(&priv->reglock, flags);
	}

	return done;
}

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static void netsec_set_tx_de(struct netsec_priv *priv,
			     struct netsec_desc_ring *dring,
			     const struct netsec_tx_pkt_ctrl *tx_ctrl,
			     const struct netsec_desc *desc,
			     struct sk_buff *skb)
{
	int idx = dring->head;
	struct netsec_de *de;
	u32 attr;

	de = dring->vaddr + (DESC_SZ * idx);

	attr = (1 << NETSEC_TX_SHIFT_OWN_FIELD) |
	       (1 << NETSEC_TX_SHIFT_PT_FIELD) |
	       (NETSEC_RING_GMAC << NETSEC_TX_SHIFT_TDRID_FIELD) |
	       (1 << NETSEC_TX_SHIFT_FS_FIELD) |
	       (1 << NETSEC_TX_LAST) |
	       (tx_ctrl->cksum_offload_flag << NETSEC_TX_SHIFT_CO) |
	       (tx_ctrl->tcp_seg_offload_flag << NETSEC_TX_SHIFT_SO) |
	       (1 << NETSEC_TX_SHIFT_TRS_FIELD);
	if (idx == DESC_NUM - 1)
		attr |= (1 << NETSEC_TX_SHIFT_LD_FIELD);

	de->data_buf_addr_up = upper_32_bits(desc->dma_addr);
	de->data_buf_addr_lw = lower_32_bits(desc->dma_addr);
	de->buf_len_info = (tx_ctrl->tcp_seg_len << 16) | desc->len;
	de->attr = attr;
	dma_wmb();

	dring->desc[idx] = *desc;
	dring->desc[idx].skb = skb;

	/* move head ahead */
	dring->head = (dring->head + 1) % DESC_NUM;
}

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static netdev_tx_t netsec_netdev_start_xmit(struct sk_buff *skb,
					    struct net_device *ndev)
{
	struct netsec_priv *priv = netdev_priv(ndev);
	struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_TX];
	struct netsec_tx_pkt_ctrl tx_ctrl = {};
	struct netsec_desc tx_desc;
	u16 tso_seg_len = 0;
	int filled;

	/* differentiate between full/emtpy ring */
	if (dring->head >= dring->tail)
		filled = dring->head - dring->tail;
	else
		filled = dring->head + DESC_NUM - dring->tail;

	if (DESC_NUM - filled < 2) { /* if less than 2 available */
		netif_err(priv, drv, priv->ndev, "%s: TxQFull!\n", __func__);
		netif_stop_queue(priv->ndev);
		dma_wmb();
		return NETDEV_TX_BUSY;
	}

	if (skb->ip_summed == CHECKSUM_PARTIAL)
		tx_ctrl.cksum_offload_flag = true;

	if (skb_is_gso(skb))
		tso_seg_len = skb_shinfo(skb)->gso_size;

	if (tso_seg_len > 0) {
		if (skb->protocol == htons(ETH_P_IP)) {
			ip_hdr(skb)->tot_len = 0;
			tcp_hdr(skb)->check =
				~tcp_v4_check(0, ip_hdr(skb)->saddr,
					      ip_hdr(skb)->daddr, 0);
		} else {
			ipv6_hdr(skb)->payload_len = 0;
			tcp_hdr(skb)->check =
				~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
						 &ipv6_hdr(skb)->daddr,
						 0, IPPROTO_TCP, 0);
		}

		tx_ctrl.tcp_seg_offload_flag = true;
		tx_ctrl.tcp_seg_len = tso_seg_len;
	}

	tx_desc.dma_addr = dma_map_single(priv->dev, skb->data,
					  skb_headlen(skb), DMA_TO_DEVICE);
	if (dma_mapping_error(priv->dev, tx_desc.dma_addr)) {
		netif_err(priv, drv, priv->ndev,
			  "%s: DMA mapping failed\n", __func__);
		ndev->stats.tx_dropped++;
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}
	tx_desc.addr = skb->data;
	tx_desc.len = skb_headlen(skb);

	skb_tx_timestamp(skb);
	netdev_sent_queue(priv->ndev, skb->len);

	netsec_set_tx_de(priv, dring, &tx_ctrl, &tx_desc, skb);
	netsec_write(priv, NETSEC_REG_NRM_TX_PKTCNT, 1); /* submit another tx */

	return NETDEV_TX_OK;
}

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static void netsec_uninit_pkt_dring(struct netsec_priv *priv, int id)
{
	struct netsec_desc_ring *dring = &priv->desc_ring[id];
	struct netsec_desc *desc;
	u16 idx;

	if (!dring->vaddr || !dring->desc)
		return;

	for (idx = 0; idx < DESC_NUM; idx++) {
		desc = &dring->desc[idx];
		if (!desc->addr)
			continue;

		dma_unmap_single(priv->dev, desc->dma_addr, desc->len,
				 id == NETSEC_RING_RX ? DMA_FROM_DEVICE :
							      DMA_TO_DEVICE);
		dev_kfree_skb(desc->skb);
	}

	memset(dring->desc, 0, sizeof(struct netsec_desc) * DESC_NUM);
	memset(dring->vaddr, 0, DESC_SZ * DESC_NUM);

	dring->head = 0;
	dring->tail = 0;
	dring->pkt_cnt = 0;
}

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static void netsec_free_dring(struct netsec_priv *priv, int id)
{
	struct netsec_desc_ring *dring = &priv->desc_ring[id];

	if (dring->vaddr) {
		dma_free_coherent(priv->dev, DESC_SZ * DESC_NUM,
				  dring->vaddr, dring->desc_dma);
		dring->vaddr = NULL;
	}

	kfree(dring->desc);
	dring->desc = NULL;
}

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Arnd Bergmann 1 1.37% 1 50.00%
Total 73 100.00% 2 100.00%



static int netsec_alloc_dring(struct netsec_priv *priv, enum ring_id id)
{
	struct netsec_desc_ring *dring = &priv->desc_ring[id];
	int ret = 0;

	dring->vaddr = dma_zalloc_coherent(priv->dev, DESC_SZ * DESC_NUM,
					   &dring->desc_dma, GFP_KERNEL);
	if (!dring->vaddr) {
		ret = -ENOMEM;
		goto err;
	}

	dring->desc = kzalloc(DESC_NUM * sizeof(*dring->desc), GFP_KERNEL);
	if (!dring->desc) {
		ret = -ENOMEM;
		goto err;
	}

	return 0;
err:
	netsec_free_dring(priv, id);

	return ret;
}

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Total 123 100.00% 2 100.00%



static int netsec_setup_rx_dring(struct netsec_priv *priv)
{
	struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX];
	struct netsec_desc desc;
	struct sk_buff *skb;
	int n;

	desc.len = priv->ndev->mtu + 22;

	for (n = 0; n < DESC_NUM; n++) {
		skb = netsec_alloc_skb(priv, &desc);
		if (!skb) {
			netsec_uninit_pkt_dring(priv, NETSEC_RING_RX);
			return -ENOMEM;
		}
		netsec_set_rx_de(priv, dring, n, &desc, skb);
	}

	return 0;
}

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static int netsec_netdev_load_ucode_region(struct netsec_priv *priv, u32 reg,
					   u32 addr_h, u32 addr_l, u32 size)
{
	u64 base = (u64)addr_h << 32 | addr_l;
	void __iomem *ucode;
	u32 i;

	ucode = ioremap(base, size * sizeof(u32));
	if (!ucode)
		return -ENOMEM;

	for (i = 0; i < size; i++)
		netsec_write(priv, reg, readl(ucode + i * 4));

	iounmap(ucode);
	return 0;
}

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static int netsec_netdev_load_microcode(struct netsec_priv *priv)
{
	u32 addr_h, addr_l, size;
	int err;

	addr_h = readl(priv->eeprom_base + NETSEC_EEPROM_HM_ME_ADDRESS_H);
	addr_l = readl(priv->eeprom_base + NETSEC_EEPROM_HM_ME_ADDRESS_L);
	size = readl(priv->eeprom_base + NETSEC_EEPROM_HM_ME_SIZE);
	err = netsec_netdev_load_ucode_region(priv, NETSEC_REG_DMAC_HM_CMD_BUF,
					      addr_h, addr_l, size);
	if (err)
		return err;

	addr_h = readl(priv->eeprom_base + NETSEC_EEPROM_MH_ME_ADDRESS_H);
	addr_l = readl(priv->eeprom_base + NETSEC_EEPROM_MH_ME_ADDRESS_L);
	size = readl(priv->eeprom_base + NETSEC_EEPROM_MH_ME_SIZE);
	err = netsec_netdev_load_ucode_region(priv, NETSEC_REG_DMAC_MH_CMD_BUF,
					      addr_h, addr_l, size);
	if (err)
		return err;

	addr_h = 0;
	addr_l = readl(priv->eeprom_base + NETSEC_EEPROM_PKT_ME_ADDRESS);
	size = readl(priv->eeprom_base + NETSEC_EEPROM_PKT_ME_SIZE);
	err = netsec_netdev_load_ucode_region(priv, NETSEC_REG_PKT_CMD_BUF,
					      addr_h, addr_l, size);
	if (err)
		return err;

	return 0;
}

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static int netsec_reset_hardware(struct netsec_priv *priv)
{
	u32 value;
	int err;

	/* stop DMA engines */
	if (!netsec_read(priv, NETSEC_REG_ADDR_DIS_CORE)) {
		netsec_write(priv, NETSEC_REG_DMA_HM_CTRL,
			     NETSEC_DMA_CTRL_REG_STOP);
		netsec_write(priv, NETSEC_REG_DMA_MH_CTRL,
			     NETSEC_DMA_CTRL_REG_STOP);

		while (netsec_read(priv, NETSEC_REG_DMA_HM_CTRL) &
		       NETSEC_DMA_CTRL_REG_STOP)
			cpu_relax();

		while (netsec_read(priv, NETSEC_REG_DMA_MH_CTRL) &
		       NETSEC_DMA_CTRL_REG_STOP)
			cpu_relax();
	}

	netsec_write(priv, NETSEC_REG_SOFT_RST, NETSEC_SOFT_RST_REG_RESET);
	netsec_write(priv, NETSEC_REG_SOFT_RST, NETSEC_SOFT_RST_REG_RUN);
	netsec_write(priv, NETSEC_REG_COM_INIT, NETSEC_COM_INIT_REG_ALL);

	while (netsec_read(priv, NETSEC_REG_COM_INIT) != 0)
		cpu_relax();

	/* set desc_start addr */
	netsec_write(priv, NETSEC_REG_NRM_RX_DESC_START_UP,
		     upper_32_bits(priv->desc_ring[NETSEC_RING_RX].desc_dma));
	netsec_write(priv, NETSEC_REG_NRM_RX_DESC_START_LW,
		     lower_32_bits(priv->desc_ring[NETSEC_RING_RX].desc_dma));

	netsec_write(priv, NETSEC_REG_NRM_TX_DESC_START_UP,
		     upper_32_bits(priv->desc_ring[NETSEC_RING_TX].desc_dma));
	netsec_write(priv, NETSEC_REG_NRM_TX_DESC_START_LW,
		     lower_32_bits(priv->desc_ring[NETSEC_RING_TX].desc_dma));

	/* set normal tx dring ring config */
	netsec_write(priv, NETSEC_REG_NRM_TX_CONFIG,
		     1 << NETSEC_REG_DESC_ENDIAN);
	netsec_write(priv, NETSEC_REG_NRM_RX_CONFIG,
		     1 << NETSEC_REG_DESC_ENDIAN);

	err = netsec_netdev_load_microcode(priv);
	if (err) {
		netif_err(priv, probe, priv->ndev,
			  "%s: failed to load microcode (%d)\n", __func__, err);
		return err;
	}

	/* start DMA engines */
	netsec_write(priv, NETSEC_REG_DMA_TMR_CTRL, priv->freq / 1000000 - 1);
	netsec_write(priv, NETSEC_REG_ADDR_DIS_CORE, 0);

	usleep_range(1000, 2000);

	if (!(netsec_read(priv, NETSEC_REG_TOP_STATUS) &
	      NETSEC_TOP_IRQ_REG_CODE_LOAD_END)) {
		netif_err(priv, probe, priv->ndev,
			  "microengine start failed\n");
		return -ENXIO;
	}
	netsec_write(priv, NETSEC_REG_TOP_STATUS,
		     NETSEC_TOP_IRQ_REG_CODE_LOAD_END);

	value = NETSEC_PKT_CTRL_REG_MODE_NRM;
	if (priv->ndev->mtu > ETH_DATA_LEN)
		value |= NETSEC_PKT_CTRL_REG_EN_JUMBO;

	/* change to normal mode */
	netsec_write(priv, NETSEC_REG_DMA_MH_CTRL, MH_CTRL__MODE_TRANS);
	netsec_write(priv, NETSEC_REG_PKT_CTRL, value);

	while ((netsec_read(priv, NETSEC_REG_MODE_TRANS_COMP_STATUS) &
		NETSEC_MODE_TRANS_COMP_IRQ_T2N) == 0)
		cpu_relax();

	/* clear any pending EMPTY/ERR irq status */
	netsec_write(priv, NETSEC_REG_NRM_TX_STATUS, ~0);

	/* Disable TX & RX intr */
	netsec_write(priv, NETSEC_REG_INTEN_CLR, ~0);

	return 0;
}

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static int netsec_start_gmac(struct netsec_priv *priv)
{
	struct phy_device *phydev = priv->ndev->phydev;
	u32 value = 0;
	int ret;

	if (phydev->speed != SPEED_1000)
		value = (NETSEC_GMAC_MCR_REG_CST |
			 NETSEC_GMAC_MCR_REG_HALF_DUPLEX_COMMON);

	if (netsec_mac_write(priv, GMAC_REG_MCR, value))
		return -ETIMEDOUT;
	if (netsec_mac_write(priv, GMAC_REG_BMR,
			     NETSEC_GMAC_BMR_REG_RESET))
		return -ETIMEDOUT;

	/* Wait soft reset */
	usleep_range(1000, 5000);

	ret = netsec_mac_read(priv, GMAC_REG_BMR, &value);
	if (ret)
		return ret;
	if (value & NETSEC_GMAC_BMR_REG_SWR)
		return -EAGAIN;

	netsec_write(priv, MAC_REG_DESC_SOFT_RST, 1);
	if (netsec_wait_while_busy(priv, MAC_REG_DESC_SOFT_RST, 1))
		return -ETIMEDOUT;

	netsec_write(priv, MAC_REG_DESC_INIT, 1);
	if (netsec_wait_while_busy(priv, MAC_REG_DESC_INIT, 1))
		return -ETIMEDOUT;

	if (netsec_mac_write(priv, GMAC_REG_BMR,
			     NETSEC_GMAC_BMR_REG_COMMON))
		return -ETIMEDOUT;
	if (netsec_mac_write(priv, GMAC_REG_RDLAR,
			     NETSEC_GMAC_RDLAR_REG_COMMON))
		return -ETIMEDOUT;
	if (netsec_mac_write(priv, GMAC_REG_TDLAR,
			     NETSEC_GMAC_TDLAR_REG_COMMON))
		return -ETIMEDOUT;
	if (netsec_mac_write(priv, GMAC_REG_MFFR, 0x80000001))
		return -ETIMEDOUT;

	ret = netsec_mac_update_to_phy_state(priv);
	if (ret)
		return ret;

	ret = netsec_mac_read(priv, GMAC_REG_OMR, &value);
	if (ret)
		return ret;

	value |= NETSEC_GMAC_OMR_REG_SR;
	value |= NETSEC_GMAC_OMR_REG_ST;

	netsec_write(priv, NETSEC_REG_NRM_RX_INTEN_CLR, ~0);
	netsec_write(priv, NETSEC_REG_NRM_TX_INTEN_CLR, ~0);

	netsec_et_set_coalesce(priv->ndev, &priv->et_coalesce);

	if (netsec_mac_write(priv, GMAC_REG_OMR, value))
		return -ETIMEDOUT;

	return 0;
}

Contributors
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Jassi Brar 312 100.00% 1 100.00%
Total 312 100.00% 1 100.00%



static int netsec_stop_gmac(struct netsec_priv *priv)
{
	u32 value;
	int ret;

	ret = netsec_mac_read(priv, GMAC_REG_OMR, &value);
	if (ret)
		return ret;
	value &= ~NETSEC_GMAC_OMR_REG_SR;
	value &= ~NETSEC_GMAC_OMR_REG_ST;

	/* disable all interrupts */
	netsec_write(priv, NETSEC_REG_NRM_RX_INTEN_CLR, ~0);
	netsec_write(priv, NETSEC_REG_NRM_TX_INTEN_CLR, ~0);

	return netsec_mac_write(priv, GMAC_REG_OMR, value);
}

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Total 77 100.00% 1 100.00%



static void netsec_phy_adjust_link(struct net_device *ndev)
{
	struct netsec_priv *priv = netdev_priv(ndev);

	if (ndev->phydev->link)
		netsec_start_gmac(priv);
	else
		netsec_stop_gmac(priv);

	phy_print_status(ndev->phydev);
}

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Total 47 100.00% 1 100.00%



static irqreturn_t netsec_irq_handler(int irq, void *dev_id)
{
	struct netsec_priv *priv = dev_id;
	u32 val, status = netsec_read(priv, NETSEC_REG_TOP_STATUS);
	unsigned long flags;

	/* Disable interrupts */
	if (status & NETSEC_IRQ_TX) {
		val = netsec_read(priv, NETSEC_REG_NRM_TX_STATUS);
		netsec_write(priv, NETSEC_REG_NRM_TX_STATUS, val);
	}
	if (status & NETSEC_IRQ_RX) {
		val = netsec_read(priv, NETSEC_REG_NRM_RX_STATUS);
		netsec_write(priv, NETSEC_REG_NRM_RX_STATUS, val);
	}

	spin_lock_irqsave(&priv->reglock, flags);
	netsec_write(priv, NETSEC_REG_INTEN_CLR, NETSEC_IRQ_RX | NETSEC_IRQ_TX);
	spin_unlock_irqrestore(&priv->reglock, flags);

	napi_schedule(&priv->napi);

	return IRQ_HANDLED;
}

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Jassi Brar 131 100.00% 1 100.00%
Total 131 100.00% 1 100.00%



static int netsec_netdev_open(struct net_device *ndev)
{
	struct netsec_priv *priv = netdev_priv(ndev);
	int ret;

	pm_runtime_get_sync(priv->dev);

	ret = netsec_setup_rx_dring(priv);
	if (ret) {
		netif_err(priv, probe, priv->ndev,
			  "%s: fail setup ring\n", __func__);
		goto err1;
	}

	ret = request_irq(priv->ndev->irq, netsec_irq_handler,
			  IRQF_SHARED, "netsec", priv);
	if (ret) {
		netif_err(priv, drv, priv->ndev, "request_irq failed\n");
		goto err2;
	}

	if (dev_of_node(priv->dev)) {
		if (!of_phy_connect(priv->ndev, priv->phy_np,
				    netsec_phy_adjust_link, 0,
				    priv->phy_interface)) {
			netif_err(priv, link, priv->ndev, "missing PHY\n");
			ret = -ENODEV;
			goto err3;
		}
	} else {
		ret = phy_connect_direct(priv->ndev, priv->phydev,
					 netsec_phy_adjust_link,
					 priv->phy_interface);
		if (ret) {
			netif_err(priv, link, priv->ndev,
				  "phy_connect_direct() failed (%d)\n", ret);
			goto err3;
		}
	}

	phy_start(ndev->phydev);

	netsec_start_gmac(priv);
	napi_enable(&priv->napi);
	netif_start_queue(ndev);

	/* Enable RX intr. */
	netsec_write(priv, NETSEC_REG_INTEN_SET, NETSEC_IRQ_RX);

	return 0;
err3:
	free_irq(priv->ndev->irq, priv);
err2:
	netsec_uninit_pkt_dring(priv, NETSEC_RING_RX);
err1:
	pm_runtime_put_sync(priv->dev);
	return ret;
}

Contributors
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Jassi Brar 272 98.19% 1 50.00%
Wei Yongjun 5 1.81% 1 50.00%
Total 277 100.00% 2 100.00%



static int netsec_netdev_stop(struct net_device *ndev)
{
	struct netsec_priv *priv = netdev_priv(ndev);

	netif_stop_queue(priv->ndev);
	dma_wmb();

	napi_disable(&priv->napi);

	netsec_write(priv, NETSEC_REG_INTEN_CLR, ~0);
	netsec_stop_gmac(priv);

	free_irq(priv->ndev->irq, priv);

	netsec_uninit_pkt_dring(priv, NETSEC_RING_TX);
	netsec_uninit_pkt_dring(priv, NETSEC_RING_RX);

	phy_stop(ndev->phydev);
	phy_disconnect(ndev->phydev);

	pm_runtime_put_sync(priv->dev);

	return 0;
}

Contributors
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Jassi Brar 103 100.00% 1 100.00%
Total 103 100.00% 1 100.00%



static int netsec_netdev_init(struct net_device *ndev)
{
	struct netsec_priv *priv = netdev_priv(ndev);
	int ret;

	ret = netsec_alloc_dring(priv, NETSEC_RING_TX);
	if (ret)
		return ret;

	ret = netsec_alloc_dring(priv, NETSEC_RING_RX);
	if (ret)
		goto err1;

	ret = netsec_reset_hardware(priv);
	if (ret)
		goto err2;

	return 0;
err2:
	netsec_free_dring(priv, NETSEC_RING_RX);
err1:
	netsec_free_dring(priv, NETSEC_RING_TX);
	return ret;
}

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Jassi Brar 94 100.00% 1 100.00%
Total 94 100.00% 1 100.00%



static void netsec_netdev_uninit(struct net_device *ndev)
{
	struct netsec_priv *priv = netdev_priv(ndev);

	netsec_free_dring(priv, NETSEC_RING_RX);
	netsec_free_dring(priv, NETSEC_RING_TX);
}

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Jassi Brar 35 100.00% 1 100.00%
Total 35 100.00% 1 100.00%



static int netsec_netdev_set_features(struct net_device *ndev,
				      netdev_features_t features)
{
	struct netsec_priv *priv = netdev_priv(ndev);

	priv->rx_cksum_offload_flag = !!(features & NETIF_F_RXCSUM);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jassi Brar 39 100.00% 1 100.00%
Total 39 100.00% 1 100.00%



static int netsec_netdev_ioctl(struct net_device *ndev, struct ifreq *ifr,
			       int cmd)
{
	return phy_mii_ioctl(ndev->phydev, ifr, cmd);
}

Contributors
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Jassi Brar 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%


static const struct net_device_ops netsec_netdev_ops = {
	.ndo_init		= netsec_netdev_init,
	.ndo_uninit		= netsec_netdev_uninit,
	.ndo_open		= netsec_netdev_open,
	.ndo_stop		= netsec_netdev_stop,
	.ndo_start_xmit		= netsec_netdev_start_xmit,
	.ndo_set_features	= netsec_netdev_set_features,
	.ndo_set_mac_address    = eth_mac_addr,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_do_ioctl		= netsec_netdev_ioctl,
};



static int netsec_of_probe(struct platform_device *pdev,
			   struct netsec_priv *priv)
{
	priv->phy_np = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
	if (!priv->phy_np) {
		dev_err(&pdev->dev, "missing required property 'phy-handle'\n");
		return -EINVAL;
	}

	priv->clk = devm_clk_get(&pdev->dev, NULL); /* get by 'phy_ref_clk' */
	if (IS_ERR(priv->clk)) {
		dev_err(&pdev->dev, "phy_ref_clk not found\n");
		return PTR_ERR(priv->clk);
	}
	priv->freq = clk_get_rate(priv->clk);

	return 0;
}

Contributors
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Jassi Brar 114 100.00% 1 100.00%
Total 114 100.00% 1 100.00%



static int netsec_acpi_probe(struct platform_device *pdev,
			     struct netsec_priv *priv, u32 *phy_addr)
{
	int ret;

	if (!IS_ENABLED(CONFIG_ACPI))
		return -ENODEV;

	ret = device_property_read_u32(&pdev->dev, "phy-channel", phy_addr);
	if (ret) {
		dev_err(&pdev->dev,
			"missing required property 'phy-channel'\n");
		return ret;
	}

	ret = device_property_read_u32(&pdev->dev,
				       "socionext,phy-clock-frequency",
				       &priv->freq);
	if (ret)
		dev_err(&pdev->dev,
			"missing required property 'socionext,phy-clock-frequency'\n");
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jassi Brar 102 100.00% 1 100.00%
Total 102 100.00% 1 100.00%



static void netsec_unregister_mdio(struct netsec_priv *priv)
{
	struct phy_device *phydev = priv->phydev;

	if (!dev_of_node(priv->dev) && phydev) {
		phy_device_remove(phydev);
		phy_device_free(phydev);
	}

	mdiobus_unregister(priv->mii_bus);
}

Contributors
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Jassi Brar 51 100.00% 1 100.00%
Total 51 100.00% 1 100.00%



static int netsec_register_mdio(struct netsec_priv *priv, u32 phy_addr)
{
	struct mii_bus *bus;
	int ret;

	bus = devm_mdiobus_alloc(priv->dev);
	if (!bus)
		return -ENOMEM;

	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(priv->dev));
	bus->priv = priv;
	bus->name = "SNI NETSEC MDIO";
	bus->read = netsec_phy_read;
	bus->write = netsec_phy_write;
	bus->parent = priv->dev;
	priv->mii_bus = bus;

	if (dev_of_node(priv->dev)) {
		struct device_node *mdio_node, *parent = dev_of_node(priv->dev);

		mdio_node = of_get_child_by_name(parent, "mdio");
		if (mdio_node) {
			parent = mdio_node;
		} else {
			/* older f/w doesn't populate the mdio subnode,
                         * allow relaxed upgrade of f/w in due time.
                         */
			dev_info(priv->dev, "Upgrade f/w for mdio subnode!\n");
		}

		ret = of_mdiobus_register(bus, parent);
		of_node_put(mdio_node);

		if (ret) {
			dev_err(priv->dev, "mdiobus register err(%d)\n", ret);
			return ret;
		}
	} else {
		/* Mask out all PHYs from auto probing. */
		bus->phy_mask = ~0;
		ret = mdiobus_register(bus);
		if (ret) {
			dev_err(priv->dev, "mdiobus register err(%d)\n", ret);
			return ret;
		}

		priv->phydev = get_phy_device(bus, phy_addr, false);
		if (IS_ERR(priv->phydev)) {
			ret = PTR_ERR(priv->phydev);
			dev_err(priv->dev, "get_phy_device err(%d)\n", ret);
			priv->phydev = NULL;
			return -ENODEV;
		}

		ret = phy_device_register(priv->phydev);
		if (ret) {
			mdiobus_unregister(bus);
			dev_err(priv->dev,
				"phy_device_register err(%d)\n", ret);
		}
	}

	return ret;
}

Contributors
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Jassi Brar 314 100.00% 1 100.00%
Total 314 100.00% 1 100.00%



static int netsec_probe(struct platform_device *pdev)
{
	struct resource *mmio_res, *eeprom_res, *irq_res;
	u8 *mac, macbuf[ETH_ALEN];
	struct netsec_priv *priv;
	u32 hw_ver, phy_addr = 0;
	struct net_device *ndev;
	int ret;

	mmio_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!mmio_res) {
		dev_err(&pdev->dev, "No MMIO resource found.\n");
		return -ENODEV;
	}

	eeprom_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!eeprom_res) {
		dev_info(&pdev->dev, "No EEPROM resource found.\n");
		return -ENODEV;
	}

	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!irq_res) {
		dev_err(&pdev->dev, "No IRQ resource found.\n");
		return -ENODEV;
	}

	ndev = alloc_etherdev(sizeof(*priv));
	if (!ndev)
		return -ENOMEM;

	priv = netdev_priv(ndev);

	spin_lock_init(&priv->reglock);
	SET_NETDEV_DEV(ndev, &pdev->dev);
	platform_set_drvdata(pdev, priv);
	ndev->irq = irq_res->start;
	priv->dev = &pdev->dev;
	priv->ndev = ndev;

	priv->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV |
			   NETIF_MSG_LINK | NETIF_MSG_PROBE;

	priv->phy_interface = device_get_phy_mode(&pdev->dev);
	if (priv->phy_interface < 0) {
		dev_err(&pdev->dev, "missing required property 'phy-mode'\n");
		ret = -ENODEV;
		goto free_ndev;
	}

	priv->ioaddr = devm_ioremap(&pdev->dev, mmio_res->start,
				    resource_size(mmio_res));
	if (!priv->ioaddr) {
		dev_err(&pdev->dev, "devm_ioremap() failed\n");
		ret = -ENXIO;
		goto free_ndev;
	}

	priv->eeprom_base = devm_ioremap(&pdev->dev, eeprom_res->start,
					 resource_size(eeprom_res));
	if (!priv->eeprom_base) {
		dev_err(&pdev->dev, "devm_ioremap() failed for EEPROM\n");
		ret = -ENXIO;
		goto free_ndev;
	}

	mac = device_get_mac_address(&pdev->dev, macbuf, sizeof(macbuf));
	if (mac)
		ether_addr_copy(ndev->dev_addr, mac);

	if (priv->eeprom_base &&
	    (!mac || !is_valid_ether_addr(ndev->dev_addr))) {
		void __iomem *macp = priv->eeprom_base +
					NETSEC_EEPROM_MAC_ADDRESS;

		ndev->dev_addr[0] = readb(macp + 3);
		ndev->dev_addr[1] = readb(macp + 2);
		ndev->dev_addr[2] = readb(macp + 1);
		ndev->dev_addr[3] = readb(macp + 0);
		ndev->dev_addr[4] = readb(macp + 7);
		ndev->dev_addr[5] = readb(macp + 6);
	}

	if (!is_valid_ether_addr(ndev->dev_addr)) {
		dev_warn(&pdev->dev, "No MAC address found, using random\n");
		eth_hw_addr_random(ndev);
	}

	if (dev_of_node(&pdev->dev))
		ret = netsec_of_probe(pdev, priv);
	else
		ret = netsec_acpi_probe(pdev, priv, &phy_addr);
	if (ret)
		goto free_ndev;

	if (!priv->freq) {
		dev_err(&pdev->dev, "missing PHY reference clock frequency\n");
		ret = -ENODEV;
		goto free_ndev;
	}

	/* default for throughput */
	priv->et_coalesce.rx_coalesce_usecs = 500;
	priv->et_coalesce.rx_max_coalesced_frames = 8;
	priv->et_coalesce.tx_coalesce_usecs = 500;
	priv->et_coalesce.tx_max_coalesced_frames = 8;

	ret = device_property_read_u32(&pdev->dev, "max-frame-size",
				       &ndev->max_mtu);
	if (ret < 0)
		ndev->max_mtu = ETH_DATA_LEN;

	/* runtime_pm coverage just for probe, open/close also cover it */
	pm_runtime_enable(&pdev->dev);
	pm_runtime_get_sync(&pdev->dev);

	hw_ver = netsec_read(priv, NETSEC_REG_F_TAIKI_VER);
	/* this driver only supports F_TAIKI style NETSEC */
	if (NETSEC_F_NETSEC_VER_MAJOR_NUM(hw_ver) !=
	    NETSEC_F_NETSEC_VER_MAJOR_NUM(NETSEC_REG_NETSEC_VER_F_TAIKI)) {
		ret = -ENODEV;
		goto pm_disable;
	}

	dev_info(&pdev->dev, "hardware revision %d.%d\n",
		 hw_ver >> 16, hw_ver & 0xffff);

	netif_napi_add(ndev, &priv->napi, netsec_napi_poll, NAPI_BUDGET);

	ndev->netdev_ops = &netsec_netdev_ops;
	ndev->ethtool_ops = &netsec_ethtool_ops;

	ndev->features |= NETIF_F_HIGHDMA | NETIF_F_RXCSUM | NETIF_F_GSO |
				NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
	ndev->hw_features = ndev->features;

	priv->rx_cksum_offload_flag = true;

	ret = netsec_register_mdio(priv, phy_addr);
	if (ret)
		goto unreg_napi;

	if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)))
		dev_warn(&pdev->dev, "Failed to set DMA mask\n");

	ret = register_netdev(ndev);
	if (ret) {
		netif_err(priv, probe, ndev, "register_netdev() failed\n");
		goto unreg_mii;
	}

	pm_runtime_put_sync(&pdev->dev);
	return 0;

unreg_mii:
	netsec_unregister_mdio(priv);
unreg_napi:
	netif_napi_del(&priv->napi);
pm_disable:
	pm_runtime_put_sync(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
free_ndev:
	free_netdev(ndev);
	dev_err(&pdev->dev, "init failed\n");

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Jassi Brar 928 99.78% 1 50.00%
Ard Biesheuvel 2 0.22% 1 50.00%
Total 930 100.00% 2 100.00%



static int netsec_remove(struct platform_device *pdev)
{
	struct netsec_priv *priv = platform_get_drvdata(pdev);

	unregister_netdev(priv->ndev);

	netsec_unregister_mdio(priv);

	netif_napi_del(&priv->napi);

	pm_runtime_disable(&pdev->dev);
	free_netdev(priv->ndev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Jassi Brar 59 100.00% 1 100.00%
Total 59 100.00% 1 100.00%

#ifdef CONFIG_PM


static int netsec_runtime_suspend(struct device *dev)
{
	struct netsec_priv *priv = dev_get_drvdata(dev);

	netsec_write(priv, NETSEC_REG_CLK_EN, 0);

	clk_disable_unprepare(priv->clk);

	return 0;
}

Contributors
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Jassi Brar 40 100.00% 1 100.00%
Total 40 100.00% 1 100.00%



static int netsec_runtime_resume(struct device *dev)
{
	struct netsec_priv *priv = dev_get_drvdata(dev);

	clk_prepare_enable(priv->clk);

	netsec_write(priv, NETSEC_REG_CLK_EN, NETSEC_CLK_EN_REG_DOM_D |
					       NETSEC_CLK_EN_REG_DOM_C |
					       NETSEC_CLK_EN_REG_DOM_G);
	return 0;
}
Contributors
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Jassi Brar 44 100.00% 1 100.00%
Total 44 100.00% 1 100.00%

#endif


static const struct dev_pm_ops netsec_pm_ops = {
	SET_RUNTIME_PM_OPS(netsec_runtime_suspend, netsec_runtime_resume, NULL)
};


static const struct of_device_id netsec_dt_ids[] = {
	{ .compatible = "socionext,synquacer-netsec" },
	{ }
};
MODULE_DEVICE_TABLE(of, netsec_dt_ids);

#ifdef CONFIG_ACPI

static const struct acpi_device_id netsec_acpi_ids[] = {
	{ "SCX0001" },
	{ }
};
MODULE_DEVICE_TABLE(acpi, netsec_acpi_ids);
#endif


static struct platform_driver netsec_driver = {
	.probe	= netsec_probe,
	.remove	= netsec_remove,
	.driver = {
		.name = "netsec",
		.pm = &netsec_pm_ops,
		.of_match_table = netsec_dt_ids,
		.acpi_match_table = ACPI_PTR(netsec_acpi_ids),
        },
};
module_platform_driver(netsec_driver);

MODULE_AUTHOR("Jassi Brar <jaswinder.singh@linaro.org>");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_DESCRIPTION("NETSEC Ethernet driver");
MODULE_LICENSE("GPL");
Overall Contributors
Person Tokens Prop Commits CommitProp
Jassi Brar 8179 99.78% 1 20.00%
Arnd Bergmann 11 0.13% 2 40.00%
Wei Yongjun 5 0.06% 1 20.00%
Ard Biesheuvel 2 0.02% 1 20.00%
Total 8197 100.00% 5 100.00%
Directory: drivers/net/ethernet/socionext

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Jassi Brar	28	100.00%	1	100.00%
Total	28	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.17 drivers/net/ethernet/socionext/netsec.c

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