dwmac-intel.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020, Intel Corporation
 */

#include <linux/clk-provider.h>
#include <linux/pci.h>
#include <linux/dmi.h>
#include "dwmac-intel.h"
#include "dwmac4.h"
#include "stmmac.h"
#include "stmmac_ptp.h"

#define INTEL_MGBE_ADHOC_ADDR	0x15
#define INTEL_MGBE_XPCS_ADDR	0x16

/* Selection for PTP Clock Freq belongs to PSE & PCH GbE */
#define PSE_PTP_CLK_FREQ_MASK		(GMAC_GPO0 | GMAC_GPO3)
#define PSE_PTP_CLK_FREQ_19_2MHZ	(GMAC_GPO0)
#define PSE_PTP_CLK_FREQ_200MHZ		(GMAC_GPO0 | GMAC_GPO3)
#define PSE_PTP_CLK_FREQ_256MHZ		(0)
#define PCH_PTP_CLK_FREQ_MASK		(GMAC_GPO0)
#define PCH_PTP_CLK_FREQ_19_2MHZ	(GMAC_GPO0)
#define PCH_PTP_CLK_FREQ_200MHZ		(0)

/* Cross-timestamping defines */
#define ART_CPUID_LEAF		0x15
#define EHL_PSE_ART_MHZ		19200000

struct intel_priv_data {
	int mdio_adhoc_addr;	/* mdio address for serdes & etc */
	unsigned long crossts_adj;
	bool is_pse;
};

/* This struct is used to associate PCI Function of MAC controller on a board,
 * discovered via DMI, with the address of PHY connected to the MAC. The
 * negative value of the address means that MAC controller is not connected
 * with PHY.
 */
struct stmmac_pci_func_data {
	unsigned int func;
	int phy_addr;
};

struct stmmac_pci_dmi_data {
	const struct stmmac_pci_func_data *func;
	size_t nfuncs;
};

struct stmmac_pci_info {
	int (*setup)(struct pci_dev *pdev, struct plat_stmmacenet_data *plat);
};

static int stmmac_pci_find_phy_addr(struct pci_dev *pdev,
				    const struct dmi_system_id *dmi_list)
{
	const struct stmmac_pci_func_data *func_data;
	const struct stmmac_pci_dmi_data *dmi_data;
	const struct dmi_system_id *dmi_id;
	int func = PCI_FUNC(pdev->devfn);
	size_t n;

	dmi_id = dmi_first_match(dmi_list);
	if (!dmi_id)
		return -ENODEV;

	dmi_data = dmi_id->driver_data;
	func_data = dmi_data->func;

	for (n = 0; n < dmi_data->nfuncs; n++, func_data++)
		if (func_data->func == func)
			return func_data->phy_addr;

	return -ENODEV;
}

static int serdes_status_poll(struct stmmac_priv *priv, int phyaddr,
			      int phyreg, u32 mask, u32 val)
{
	unsigned int retries = 10;
	int val_rd;

	do {
		val_rd = mdiobus_read(priv->mii, phyaddr, phyreg);
		if ((val_rd & mask) == (val & mask))
			return 0;
		udelay(POLL_DELAY_US);
	} while (--retries);

	return -ETIMEDOUT;
}

static int intel_serdes_powerup(struct net_device *ndev, void *priv_data)
{
	struct intel_priv_data *intel_priv = priv_data;
	struct stmmac_priv *priv = netdev_priv(ndev);
	int serdes_phy_addr = 0;
	u32 data = 0;

	if (!intel_priv->mdio_adhoc_addr)
		return 0;

	serdes_phy_addr = intel_priv->mdio_adhoc_addr;

	/* assert clk_req */
	data = mdiobus_read(priv->mii, serdes_phy_addr, SERDES_GCR0);
	data |= SERDES_PLL_CLK;
	mdiobus_write(priv->mii, serdes_phy_addr, SERDES_GCR0, data);

	/* check for clk_ack assertion */
	data = serdes_status_poll(priv, serdes_phy_addr,
				  SERDES_GSR0,
				  SERDES_PLL_CLK,
				  SERDES_PLL_CLK);

	if (data) {
		dev_err(priv->device, "Serdes PLL clk request timeout\n");
		return data;
	}

	/* assert lane reset */
	data = mdiobus_read(priv->mii, serdes_phy_addr, SERDES_GCR0);
	data |= SERDES_RST;
	mdiobus_write(priv->mii, serdes_phy_addr, SERDES_GCR0, data);

	/* check for assert lane reset reflection */
	data = serdes_status_poll(priv, serdes_phy_addr,
				  SERDES_GSR0,
				  SERDES_RST,
				  SERDES_RST);

	if (data) {
		dev_err(priv->device, "Serdes assert lane reset timeout\n");
		return data;
	}

	/*  move power state to P0 */
	data = mdiobus_read(priv->mii, serdes_phy_addr, SERDES_GCR0);

	data &= ~SERDES_PWR_ST_MASK;
	data |= SERDES_PWR_ST_P0 << SERDES_PWR_ST_SHIFT;

	mdiobus_write(priv->mii, serdes_phy_addr, SERDES_GCR0, data);

	/* Check for P0 state */
	data = serdes_status_poll(priv, serdes_phy_addr,
				  SERDES_GSR0,
				  SERDES_PWR_ST_MASK,
				  SERDES_PWR_ST_P0 << SERDES_PWR_ST_SHIFT);

	if (data) {
		dev_err(priv->device, "Serdes power state P0 timeout.\n");
		return data;
	}

	/* PSE only - ungate SGMII PHY Rx Clock */
	if (intel_priv->is_pse)
		mdiobus_modify(priv->mii, serdes_phy_addr, SERDES_GCR0,
			       0, SERDES_PHY_RX_CLK);

	return 0;
}

static void intel_serdes_powerdown(struct net_device *ndev, void *intel_data)
{
	struct intel_priv_data *intel_priv = intel_data;
	struct stmmac_priv *priv = netdev_priv(ndev);
	int serdes_phy_addr = 0;
	u32 data = 0;

	if (!intel_priv->mdio_adhoc_addr)
		return;

	serdes_phy_addr = intel_priv->mdio_adhoc_addr;

	/* PSE only - gate SGMII PHY Rx Clock */
	if (intel_priv->is_pse)
		mdiobus_modify(priv->mii, serdes_phy_addr, SERDES_GCR0,
			       SERDES_PHY_RX_CLK, 0);

	/*  move power state to P3 */
	data = mdiobus_read(priv->mii, serdes_phy_addr, SERDES_GCR0);

	data &= ~SERDES_PWR_ST_MASK;
	data |= SERDES_PWR_ST_P3 << SERDES_PWR_ST_SHIFT;

	mdiobus_write(priv->mii, serdes_phy_addr, SERDES_GCR0, data);

	/* Check for P3 state */
	data = serdes_status_poll(priv, serdes_phy_addr,
				  SERDES_GSR0,
				  SERDES_PWR_ST_MASK,
				  SERDES_PWR_ST_P3 << SERDES_PWR_ST_SHIFT);

	if (data) {
		dev_err(priv->device, "Serdes power state P3 timeout\n");
		return;
	}

	/* de-assert clk_req */
	data = mdiobus_read(priv->mii, serdes_phy_addr, SERDES_GCR0);
	data &= ~SERDES_PLL_CLK;
	mdiobus_write(priv->mii, serdes_phy_addr, SERDES_GCR0, data);

	/* check for clk_ack de-assert */
	data = serdes_status_poll(priv, serdes_phy_addr,
				  SERDES_GSR0,
				  SERDES_PLL_CLK,
				  (u32)~SERDES_PLL_CLK);

	if (data) {
		dev_err(priv->device, "Serdes PLL clk de-assert timeout\n");
		return;
	}

	/* de-assert lane reset */
	data = mdiobus_read(priv->mii, serdes_phy_addr, SERDES_GCR0);
	data &= ~SERDES_RST;
	mdiobus_write(priv->mii, serdes_phy_addr, SERDES_GCR0, data);

	/* check for de-assert lane reset reflection */
	data = serdes_status_poll(priv, serdes_phy_addr,
				  SERDES_GSR0,
				  SERDES_RST,
				  (u32)~SERDES_RST);

	if (data) {
		dev_err(priv->device, "Serdes de-assert lane reset timeout\n");
		return;
	}
}

/* Program PTP Clock Frequency for different variant of
 * Intel mGBE that has slightly different GPO mapping
 */
static void intel_mgbe_ptp_clk_freq_config(void *npriv)
{
	struct stmmac_priv *priv = (struct stmmac_priv *)npriv;
	struct intel_priv_data *intel_priv;
	u32 gpio_value;

	intel_priv = (struct intel_priv_data *)priv->plat->bsp_priv;

	gpio_value = readl(priv->ioaddr + GMAC_GPIO_STATUS);

	if (intel_priv->is_pse) {
		/* For PSE GbE, use 200MHz */
		gpio_value &= ~PSE_PTP_CLK_FREQ_MASK;
		gpio_value |= PSE_PTP_CLK_FREQ_200MHZ;
	} else {
		/* For PCH GbE, use 200MHz */
		gpio_value &= ~PCH_PTP_CLK_FREQ_MASK;
		gpio_value |= PCH_PTP_CLK_FREQ_200MHZ;
	}

	writel(gpio_value, priv->ioaddr + GMAC_GPIO_STATUS);
}

static void get_arttime(struct mii_bus *mii, int intel_adhoc_addr,
			u64 *art_time)
{
	u64 ns;

	ns = mdiobus_read(mii, intel_adhoc_addr, PMC_ART_VALUE3);
	ns <<= GMAC4_ART_TIME_SHIFT;
	ns |= mdiobus_read(mii, intel_adhoc_addr, PMC_ART_VALUE2);
	ns <<= GMAC4_ART_TIME_SHIFT;
	ns |= mdiobus_read(mii, intel_adhoc_addr, PMC_ART_VALUE1);
	ns <<= GMAC4_ART_TIME_SHIFT;
	ns |= mdiobus_read(mii, intel_adhoc_addr, PMC_ART_VALUE0);

	*art_time = ns;
}

static int intel_crosststamp(ktime_t *device,
			     struct system_counterval_t *system,
			     void *ctx)
{
	struct intel_priv_data *intel_priv;

	struct stmmac_priv *priv = (struct stmmac_priv *)ctx;
	void __iomem *ptpaddr = priv->ptpaddr;
	void __iomem *ioaddr = priv->hw->pcsr;
	unsigned long flags;
	u64 art_time = 0;
	u64 ptp_time = 0;
	u32 num_snapshot;
	u32 gpio_value;
	u32 acr_value;
	int ret;
	u32 v;
	int i;

	if (!boot_cpu_has(X86_FEATURE_ART))
		return -EOPNOTSUPP;

	intel_priv = priv->plat->bsp_priv;

	/* Both internal crosstimestamping and external triggered event
	 * timestamping cannot be run concurrently.
	 */
	if (priv->plat->ext_snapshot_en)
		return -EBUSY;

	mutex_lock(&priv->aux_ts_lock);
	/* Enable Internal snapshot trigger */
	acr_value = readl(ptpaddr + PTP_ACR);
	acr_value &= ~PTP_ACR_MASK;
	switch (priv->plat->int_snapshot_num) {
	case AUX_SNAPSHOT0:
		acr_value |= PTP_ACR_ATSEN0;
		break;
	case AUX_SNAPSHOT1:
		acr_value |= PTP_ACR_ATSEN1;
		break;
	case AUX_SNAPSHOT2:
		acr_value |= PTP_ACR_ATSEN2;
		break;
	case AUX_SNAPSHOT3:
		acr_value |= PTP_ACR_ATSEN3;
		break;
	default:
		mutex_unlock(&priv->aux_ts_lock);
		return -EINVAL;
	}
	writel(acr_value, ptpaddr + PTP_ACR);

	/* Clear FIFO */
	acr_value = readl(ptpaddr + PTP_ACR);
	acr_value |= PTP_ACR_ATSFC;
	writel(acr_value, ptpaddr + PTP_ACR);
	/* Release the mutex */
	mutex_unlock(&priv->aux_ts_lock);

	/* Trigger Internal snapshot signal
	 * Create a rising edge by just toggle the GPO1 to low
	 * and back to high.
	 */
	gpio_value = readl(ioaddr + GMAC_GPIO_STATUS);
	gpio_value &= ~GMAC_GPO1;
	writel(gpio_value, ioaddr + GMAC_GPIO_STATUS);
	gpio_value |= GMAC_GPO1;
	writel(gpio_value, ioaddr + GMAC_GPIO_STATUS);

	/* Poll for time sync operation done */
	ret = readl_poll_timeout(priv->ioaddr + GMAC_INT_STATUS, v,
				 (v & GMAC_INT_TSIE), 100, 10000);

	if (ret == -ETIMEDOUT) {
		pr_err("%s: Wait for time sync operation timeout\n", __func__);
		return ret;
	}

	num_snapshot = (readl(ioaddr + GMAC_TIMESTAMP_STATUS) &
			GMAC_TIMESTAMP_ATSNS_MASK) >>
			GMAC_TIMESTAMP_ATSNS_SHIFT;

	/* Repeat until the timestamps are from the FIFO last segment */
	for (i = 0; i < num_snapshot; i++) {
		spin_lock_irqsave(&priv->ptp_lock, flags);
		stmmac_get_ptptime(priv, ptpaddr, &ptp_time);
		*device = ns_to_ktime(ptp_time);
		spin_unlock_irqrestore(&priv->ptp_lock, flags);
		get_arttime(priv->mii, intel_priv->mdio_adhoc_addr, &art_time);
		*system = convert_art_to_tsc(art_time);
	}

	system->cycles *= intel_priv->crossts_adj;

	return 0;
}

static void intel_mgbe_pse_crossts_adj(struct intel_priv_data *intel_priv,
				       int base)
{
	if (boot_cpu_has(X86_FEATURE_ART)) {
		unsigned int art_freq;

		/* On systems that support ART, ART frequency can be obtained
		 * from ECX register of CPUID leaf (0x15).
		 */
		art_freq = cpuid_ecx(ART_CPUID_LEAF);
		do_div(art_freq, base);
		intel_priv->crossts_adj = art_freq;
	}
}

static void common_default_data(struct plat_stmmacenet_data *plat)
{
	plat->clk_csr = 2;	/* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
	plat->has_gmac = 1;
	plat->force_sf_dma_mode = 1;

	plat->mdio_bus_data->needs_reset = true;

	/* Set default value for multicast hash bins */
	plat->multicast_filter_bins = HASH_TABLE_SIZE;

	/* Set default value for unicast filter entries */
	plat->unicast_filter_entries = 1;

	/* Set the maxmtu to a default of JUMBO_LEN */
	plat->maxmtu = JUMBO_LEN;

	/* Set default number of RX and TX queues to use */
	plat->tx_queues_to_use = 1;
	plat->rx_queues_to_use = 1;

	/* Disable Priority config by default */
	plat->tx_queues_cfg[0].use_prio = false;
	plat->rx_queues_cfg[0].use_prio = false;

	/* Disable RX queues routing by default */
	plat->rx_queues_cfg[0].pkt_route = 0x0;
}

static int intel_mgbe_common_data(struct pci_dev *pdev,
				  struct plat_stmmacenet_data *plat)
{
	char clk_name[20];
	int ret;
	int i;

	plat->pdev = pdev;
	plat->phy_addr = -1;
	plat->clk_csr = 5;
	plat->has_gmac = 0;
	plat->has_gmac4 = 1;
	plat->force_sf_dma_mode = 0;
	plat->tso_en = 1;

	plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;

	for (i = 0; i < plat->rx_queues_to_use; i++) {
		plat->rx_queues_cfg[i].mode_to_use = MTL_QUEUE_DCB;
		plat->rx_queues_cfg[i].chan = i;

		/* Disable Priority config by default */
		plat->rx_queues_cfg[i].use_prio = false;

		/* Disable RX queues routing by default */
		plat->rx_queues_cfg[i].pkt_route = 0x0;
	}

	for (i = 0; i < plat->tx_queues_to_use; i++) {
		plat->tx_queues_cfg[i].mode_to_use = MTL_QUEUE_DCB;

		/* Disable Priority config by default */
		plat->tx_queues_cfg[i].use_prio = false;
		/* Default TX Q0 to use TSO and rest TXQ for TBS */
		if (i > 0)
			plat->tx_queues_cfg[i].tbs_en = 1;
	}

	/* FIFO size is 4096 bytes for 1 tx/rx queue */
	plat->tx_fifo_size = plat->tx_queues_to_use * 4096;
	plat->rx_fifo_size = plat->rx_queues_to_use * 4096;

	plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
	plat->tx_queues_cfg[0].weight = 0x09;
	plat->tx_queues_cfg[1].weight = 0x0A;
	plat->tx_queues_cfg[2].weight = 0x0B;
	plat->tx_queues_cfg[3].weight = 0x0C;
	plat->tx_queues_cfg[4].weight = 0x0D;
	plat->tx_queues_cfg[5].weight = 0x0E;
	plat->tx_queues_cfg[6].weight = 0x0F;
	plat->tx_queues_cfg[7].weight = 0x10;

	plat->dma_cfg->pbl = 32;
	plat->dma_cfg->pblx8 = true;
	plat->dma_cfg->fixed_burst = 0;
	plat->dma_cfg->mixed_burst = 0;
	plat->dma_cfg->aal = 0;

	plat->axi = devm_kzalloc(&pdev->dev, sizeof(*plat->axi),
				 GFP_KERNEL);
	if (!plat->axi)
		return -ENOMEM;

	plat->axi->axi_lpi_en = 0;
	plat->axi->axi_xit_frm = 0;
	plat->axi->axi_wr_osr_lmt = 1;
	plat->axi->axi_rd_osr_lmt = 1;
	plat->axi->axi_blen[0] = 4;
	plat->axi->axi_blen[1] = 8;
	plat->axi->axi_blen[2] = 16;

	plat->ptp_max_adj = plat->clk_ptp_rate;
	plat->eee_usecs_rate = plat->clk_ptp_rate;

	/* Set system clock */
	sprintf(clk_name, "%s-%s", "stmmac", pci_name(pdev));

	plat->stmmac_clk = clk_register_fixed_rate(&pdev->dev,
						   clk_name, NULL, 0,
						   plat->clk_ptp_rate);

	if (IS_ERR(plat->stmmac_clk)) {
		dev_warn(&pdev->dev, "Fail to register stmmac-clk\n");
		plat->stmmac_clk = NULL;
	}

	ret = clk_prepare_enable(plat->stmmac_clk);
	if (ret) {
		clk_unregister_fixed_rate(plat->stmmac_clk);
		return ret;
	}

	plat->ptp_clk_freq_config = intel_mgbe_ptp_clk_freq_config;

	/* Set default value for multicast hash bins */
	plat->multicast_filter_bins = HASH_TABLE_SIZE;

	/* Set default value for unicast filter entries */
	plat->unicast_filter_entries = 1;

	/* Set the maxmtu to a default of JUMBO_LEN */
	plat->maxmtu = JUMBO_LEN;

	plat->vlan_fail_q_en = true;

	/* Use the last Rx queue */
	plat->vlan_fail_q = plat->rx_queues_to_use - 1;

	/* Intel mgbe SGMII interface uses pcs-xcps */
	if (plat->phy_interface == PHY_INTERFACE_MODE_SGMII) {
		plat->mdio_bus_data->has_xpcs = true;
		plat->mdio_bus_data->xpcs_an_inband = true;
	}

	/* Ensure mdio bus scan skips intel serdes and pcs-xpcs */
	plat->mdio_bus_data->phy_mask = 1 << INTEL_MGBE_ADHOC_ADDR;
	plat->mdio_bus_data->phy_mask |= 1 << INTEL_MGBE_XPCS_ADDR;

	plat->int_snapshot_num = AUX_SNAPSHOT1;
	plat->ext_snapshot_num = AUX_SNAPSHOT0;

	plat->has_crossts = true;
	plat->crosststamp = intel_crosststamp;

	/* Setup MSI vector offset specific to Intel mGbE controller */
	plat->msi_mac_vec = 29;
	plat->msi_lpi_vec = 28;
	plat->msi_sfty_ce_vec = 27;
	plat->msi_sfty_ue_vec = 26;
	plat->msi_rx_base_vec = 0;
	plat->msi_tx_base_vec = 1;

	return 0;
}

static int ehl_common_data(struct pci_dev *pdev,
			   struct plat_stmmacenet_data *plat)
{
	plat->rx_queues_to_use = 8;
	plat->tx_queues_to_use = 8;
	plat->clk_ptp_rate = 200000000;

	return intel_mgbe_common_data(pdev, plat);
}

static int ehl_sgmii_data(struct pci_dev *pdev,
			  struct plat_stmmacenet_data *plat)
{
	plat->bus_id = 1;
	plat->phy_interface = PHY_INTERFACE_MODE_SGMII;

	plat->serdes_powerup = intel_serdes_powerup;
	plat->serdes_powerdown = intel_serdes_powerdown;

	return ehl_common_data(pdev, plat);
}

static struct stmmac_pci_info ehl_sgmii1g_info = {
	.setup = ehl_sgmii_data,
};

static int ehl_rgmii_data(struct pci_dev *pdev,
			  struct plat_stmmacenet_data *plat)
{
	plat->bus_id = 1;
	plat->phy_interface = PHY_INTERFACE_MODE_RGMII;

	return ehl_common_data(pdev, plat);
}

static struct stmmac_pci_info ehl_rgmii1g_info = {
	.setup = ehl_rgmii_data,
};

static int ehl_pse0_common_data(struct pci_dev *pdev,
				struct plat_stmmacenet_data *plat)
{
	struct intel_priv_data *intel_priv = plat->bsp_priv;

	intel_priv->is_pse = true;
	plat->bus_id = 2;
	plat->addr64 = 32;

	intel_mgbe_pse_crossts_adj(intel_priv, EHL_PSE_ART_MHZ);

	return ehl_common_data(pdev, plat);
}

static int ehl_pse0_rgmii1g_data(struct pci_dev *pdev,
				 struct plat_stmmacenet_data *plat)
{
	plat->phy_interface = PHY_INTERFACE_MODE_RGMII_ID;
	return ehl_pse0_common_data(pdev, plat);
}

static struct stmmac_pci_info ehl_pse0_rgmii1g_info = {
	.setup = ehl_pse0_rgmii1g_data,
};

static int ehl_pse0_sgmii1g_data(struct pci_dev *pdev,
				 struct plat_stmmacenet_data *plat)
{
	plat->phy_interface = PHY_INTERFACE_MODE_SGMII;
	plat->serdes_powerup = intel_serdes_powerup;
	plat->serdes_powerdown = intel_serdes_powerdown;
	return ehl_pse0_common_data(pdev, plat);
}

static struct stmmac_pci_info ehl_pse0_sgmii1g_info = {
	.setup = ehl_pse0_sgmii1g_data,
};

static int ehl_pse1_common_data(struct pci_dev *pdev,
				struct plat_stmmacenet_data *plat)
{
	struct intel_priv_data *intel_priv = plat->bsp_priv;

	intel_priv->is_pse = true;
	plat->bus_id = 3;
	plat->addr64 = 32;

	intel_mgbe_pse_crossts_adj(intel_priv, EHL_PSE_ART_MHZ);

	return ehl_common_data(pdev, plat);
}

static int ehl_pse1_rgmii1g_data(struct pci_dev *pdev,
				 struct plat_stmmacenet_data *plat)
{
	plat->phy_interface = PHY_INTERFACE_MODE_RGMII_ID;
	return ehl_pse1_common_data(pdev, plat);
}

static struct stmmac_pci_info ehl_pse1_rgmii1g_info = {
	.setup = ehl_pse1_rgmii1g_data,
};

static int ehl_pse1_sgmii1g_data(struct pci_dev *pdev,
				 struct plat_stmmacenet_data *plat)
{
	plat->phy_interface = PHY_INTERFACE_MODE_SGMII;
	plat->serdes_powerup = intel_serdes_powerup;
	plat->serdes_powerdown = intel_serdes_powerdown;
	return ehl_pse1_common_data(pdev, plat);
}

static struct stmmac_pci_info ehl_pse1_sgmii1g_info = {
	.setup = ehl_pse1_sgmii1g_data,
};

static int tgl_common_data(struct pci_dev *pdev,
			   struct plat_stmmacenet_data *plat)
{
	plat->rx_queues_to_use = 6;
	plat->tx_queues_to_use = 4;
	plat->clk_ptp_rate = 200000000;

	return intel_mgbe_common_data(pdev, plat);
}

static int tgl_sgmii_phy0_data(struct pci_dev *pdev,
			       struct plat_stmmacenet_data *plat)
{
	plat->bus_id = 1;
	plat->phy_interface = PHY_INTERFACE_MODE_SGMII;
	plat->serdes_powerup = intel_serdes_powerup;
	plat->serdes_powerdown = intel_serdes_powerdown;
	return tgl_common_data(pdev, plat);
}

static struct stmmac_pci_info tgl_sgmii1g_phy0_info = {
	.setup = tgl_sgmii_phy0_data,
};

static int tgl_sgmii_phy1_data(struct pci_dev *pdev,
			       struct plat_stmmacenet_data *plat)
{
	plat->bus_id = 2;
	plat->phy_interface = PHY_INTERFACE_MODE_SGMII;
	plat->serdes_powerup = intel_serdes_powerup;
	plat->serdes_powerdown = intel_serdes_powerdown;
	return tgl_common_data(pdev, plat);
}

static struct stmmac_pci_info tgl_sgmii1g_phy1_info = {
	.setup = tgl_sgmii_phy1_data,
};

static int adls_sgmii_phy0_data(struct pci_dev *pdev,
				struct plat_stmmacenet_data *plat)
{
	plat->bus_id = 1;
	plat->phy_interface = PHY_INTERFACE_MODE_SGMII;

	/* SerDes power up and power down are done in BIOS for ADL */

	return tgl_common_data(pdev, plat);
}

static struct stmmac_pci_info adls_sgmii1g_phy0_info = {
	.setup = adls_sgmii_phy0_data,
};

static int adls_sgmii_phy1_data(struct pci_dev *pdev,
				struct plat_stmmacenet_data *plat)
{
	plat->bus_id = 2;
	plat->phy_interface = PHY_INTERFACE_MODE_SGMII;

	/* SerDes power up and power down are done in BIOS for ADL */

	return tgl_common_data(pdev, plat);
}

static struct stmmac_pci_info adls_sgmii1g_phy1_info = {
	.setup = adls_sgmii_phy1_data,
};
static const struct stmmac_pci_func_data galileo_stmmac_func_data[] = {
	{
		.func = 6,
		.phy_addr = 1,
	},
};

static const struct stmmac_pci_dmi_data galileo_stmmac_dmi_data = {
	.func = galileo_stmmac_func_data,
	.nfuncs = ARRAY_SIZE(galileo_stmmac_func_data),
};

static const struct stmmac_pci_func_data iot2040_stmmac_func_data[] = {
	{
		.func = 6,
		.phy_addr = 1,
	},
	{
		.func = 7,
		.phy_addr = 1,
	},
};

static const struct stmmac_pci_dmi_data iot2040_stmmac_dmi_data = {
	.func = iot2040_stmmac_func_data,
	.nfuncs = ARRAY_SIZE(iot2040_stmmac_func_data),
};

static const struct dmi_system_id quark_pci_dmi[] = {
	{
		.matches = {
			DMI_EXACT_MATCH(DMI_BOARD_NAME, "Galileo"),
		},
		.driver_data = (void *)&galileo_stmmac_dmi_data,
	},
	{
		.matches = {
			DMI_EXACT_MATCH(DMI_BOARD_NAME, "GalileoGen2"),
		},
		.driver_data = (void *)&galileo_stmmac_dmi_data,
	},
	/* There are 2 types of SIMATIC IOT2000: IOT2020 and IOT2040.
	 * The asset tag "6ES7647-0AA00-0YA2" is only for IOT2020 which
	 * has only one pci network device while other asset tags are
	 * for IOT2040 which has two.
	 */
	{
		.matches = {
			DMI_EXACT_MATCH(DMI_BOARD_NAME, "SIMATIC IOT2000"),
			DMI_EXACT_MATCH(DMI_BOARD_ASSET_TAG,
					"6ES7647-0AA00-0YA2"),
		},
		.driver_data = (void *)&galileo_stmmac_dmi_data,
	},
	{
		.matches = {
			DMI_EXACT_MATCH(DMI_BOARD_NAME, "SIMATIC IOT2000"),
		},
		.driver_data = (void *)&iot2040_stmmac_dmi_data,
	},
	{}
};

static int quark_default_data(struct pci_dev *pdev,
			      struct plat_stmmacenet_data *plat)
{
	int ret;

	/* Set common default data first */
	common_default_data(plat);

	/* Refuse to load the driver and register net device if MAC controller
	 * does not connect to any PHY interface.
	 */
	ret = stmmac_pci_find_phy_addr(pdev, quark_pci_dmi);
	if (ret < 0) {
		/* Return error to the caller on DMI enabled boards. */
		if (dmi_get_system_info(DMI_BOARD_NAME))
			return ret;

		/* Galileo boards with old firmware don't support DMI. We always
		 * use 1 here as PHY address, so at least the first found MAC
		 * controller would be probed.
		 */
		ret = 1;
	}

	plat->bus_id = pci_dev_id(pdev);
	plat->phy_addr = ret;
	plat->phy_interface = PHY_INTERFACE_MODE_RMII;

	plat->dma_cfg->pbl = 16;
	plat->dma_cfg->pblx8 = true;
	plat->dma_cfg->fixed_burst = 1;
	/* AXI (TODO) */

	return 0;
}

static const struct stmmac_pci_info quark_info = {
	.setup = quark_default_data,
};

static int stmmac_config_single_msi(struct pci_dev *pdev,
				    struct plat_stmmacenet_data *plat,
				    struct stmmac_resources *res)
{
	int ret;

	ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
	if (ret < 0) {
		dev_info(&pdev->dev, "%s: Single IRQ enablement failed\n",
			 __func__);
		return ret;
	}

	res->irq = pci_irq_vector(pdev, 0);
	res->wol_irq = res->irq;
	plat->multi_msi_en = 0;
	dev_info(&pdev->dev, "%s: Single IRQ enablement successful\n",
		 __func__);

	return 0;
}

static int stmmac_config_multi_msi(struct pci_dev *pdev,
				   struct plat_stmmacenet_data *plat,
				   struct stmmac_resources *res)
{
	int ret;
	int i;

	if (plat->msi_rx_base_vec >= STMMAC_MSI_VEC_MAX ||
	    plat->msi_tx_base_vec >= STMMAC_MSI_VEC_MAX) {
		dev_info(&pdev->dev, "%s: Invalid RX & TX vector defined\n",
			 __func__);
		return -1;
	}

	ret = pci_alloc_irq_vectors(pdev, 2, STMMAC_MSI_VEC_MAX,
				    PCI_IRQ_MSI | PCI_IRQ_MSIX);
	if (ret < 0) {
		dev_info(&pdev->dev, "%s: multi MSI enablement failed\n",
			 __func__);
		return ret;
	}

	/* For RX MSI */
	for (i = 0; i < plat->rx_queues_to_use; i++) {
		res->rx_irq[i] = pci_irq_vector(pdev,
						plat->msi_rx_base_vec + i * 2);
	}

	/* For TX MSI */
	for (i = 0; i < plat->tx_queues_to_use; i++) {
		res->tx_irq[i] = pci_irq_vector(pdev,
						plat->msi_tx_base_vec + i * 2);
	}

	if (plat->msi_mac_vec < STMMAC_MSI_VEC_MAX)
		res->irq = pci_irq_vector(pdev, plat->msi_mac_vec);
	if (plat->msi_wol_vec < STMMAC_MSI_VEC_MAX)
		res->wol_irq = pci_irq_vector(pdev, plat->msi_wol_vec);
	if (plat->msi_lpi_vec < STMMAC_MSI_VEC_MAX)
		res->lpi_irq = pci_irq_vector(pdev, plat->msi_lpi_vec);
	if (plat->msi_sfty_ce_vec < STMMAC_MSI_VEC_MAX)
		res->sfty_ce_irq = pci_irq_vector(pdev, plat->msi_sfty_ce_vec);
	if (plat->msi_sfty_ue_vec < STMMAC_MSI_VEC_MAX)
		res->sfty_ue_irq = pci_irq_vector(pdev, plat->msi_sfty_ue_vec);

	plat->multi_msi_en = 1;
	dev_info(&pdev->dev, "%s: multi MSI enablement successful\n", __func__);

	return 0;
}

/**
 * intel_eth_pci_probe
 *
 * @pdev: pci device pointer
 * @id: pointer to table of device id/id's.
 *
 * Description: This probing function gets called for all PCI devices which
 * match the ID table and are not "owned" by other driver yet. This function
 * gets passed a "struct pci_dev *" for each device whose entry in the ID table
 * matches the device. The probe functions returns zero when the driver choose
 * to take "ownership" of the device or an error code(-ve no) otherwise.
 */
static int intel_eth_pci_probe(struct pci_dev *pdev,
			       const struct pci_device_id *id)
{
	struct stmmac_pci_info *info = (struct stmmac_pci_info *)id->driver_data;
	struct intel_priv_data *intel_priv;
	struct plat_stmmacenet_data *plat;
	struct stmmac_resources res;
	int ret;

	intel_priv = devm_kzalloc(&pdev->dev, sizeof(*intel_priv), GFP_KERNEL);
	if (!intel_priv)
		return -ENOMEM;

	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
	if (!plat)
		return -ENOMEM;

	plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
					   sizeof(*plat->mdio_bus_data),
					   GFP_KERNEL);
	if (!plat->mdio_bus_data)
		return -ENOMEM;

	plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg),
				     GFP_KERNEL);
	if (!plat->dma_cfg)
		return -ENOMEM;

	/* Enable pci device */
	ret = pcim_enable_device(pdev);
	if (ret) {
		dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
			__func__);
		return ret;
	}

	ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
	if (ret)
		return ret;

	pci_set_master(pdev);

	plat->bsp_priv = intel_priv;
	intel_priv->mdio_adhoc_addr = INTEL_MGBE_ADHOC_ADDR;
	intel_priv->crossts_adj = 1;

	/* Initialize all MSI vectors to invalid so that it can be set
	 * according to platform data settings below.
	 * Note: MSI vector takes value from 0 upto 31 (STMMAC_MSI_VEC_MAX)
	 */
	plat->msi_mac_vec = STMMAC_MSI_VEC_MAX;
	plat->msi_wol_vec = STMMAC_MSI_VEC_MAX;
	plat->msi_lpi_vec = STMMAC_MSI_VEC_MAX;
	plat->msi_sfty_ce_vec = STMMAC_MSI_VEC_MAX;
	plat->msi_sfty_ue_vec = STMMAC_MSI_VEC_MAX;
	plat->msi_rx_base_vec = STMMAC_MSI_VEC_MAX;
	plat->msi_tx_base_vec = STMMAC_MSI_VEC_MAX;

	ret = info->setup(pdev, plat);
	if (ret)
		return ret;

	memset(&res, 0, sizeof(res));
	res.addr = pcim_iomap_table(pdev)[0];

	if (plat->eee_usecs_rate > 0) {
		u32 tx_lpi_usec;

		tx_lpi_usec = (plat->eee_usecs_rate / 1000000) - 1;
		writel(tx_lpi_usec, res.addr + GMAC_1US_TIC_COUNTER);
	}

	ret = stmmac_config_multi_msi(pdev, plat, &res);
	if (ret) {
		ret = stmmac_config_single_msi(pdev, plat, &res);
		if (ret) {
			dev_err(&pdev->dev, "%s: ERROR: failed to enable IRQ\n",
				__func__);
			goto err_alloc_irq;
		}
	}

	ret = stmmac_dvr_probe(&pdev->dev, plat, &res);
	if (ret) {
		goto err_dvr_probe;
	}

	return 0;

err_dvr_probe:
	pci_free_irq_vectors(pdev);
err_alloc_irq:
	clk_disable_unprepare(plat->stmmac_clk);
	clk_unregister_fixed_rate(plat->stmmac_clk);
	return ret;
}

/**
 * intel_eth_pci_remove
 *
 * @pdev: platform device pointer
 * Description: this function calls the main to free the net resources
 * and releases the PCI resources.
 */
static void intel_eth_pci_remove(struct pci_dev *pdev)
{
	struct net_device *ndev = dev_get_drvdata(&pdev->dev);
	struct stmmac_priv *priv = netdev_priv(ndev);

	stmmac_dvr_remove(&pdev->dev);

	clk_unregister_fixed_rate(priv->plat->stmmac_clk);

	pcim_iounmap_regions(pdev, BIT(0));
}

static int __maybe_unused intel_eth_pci_suspend(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	int ret;

	ret = stmmac_suspend(dev);
	if (ret)
		return ret;

	ret = pci_save_state(pdev);
	if (ret)
		return ret;

	pci_wake_from_d3(pdev, true);
	return 0;
}

static int __maybe_unused intel_eth_pci_resume(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	int ret;

	pci_restore_state(pdev);
	pci_set_power_state(pdev, PCI_D0);

	ret = pcim_enable_device(pdev);
	if (ret)
		return ret;

	pci_set_master(pdev);

	return stmmac_resume(dev);
}

static SIMPLE_DEV_PM_OPS(intel_eth_pm_ops, intel_eth_pci_suspend,
			 intel_eth_pci_resume);

#define PCI_DEVICE_ID_INTEL_QUARK		0x0937
#define PCI_DEVICE_ID_INTEL_EHL_RGMII1G		0x4b30
#define PCI_DEVICE_ID_INTEL_EHL_SGMII1G		0x4b31
#define PCI_DEVICE_ID_INTEL_EHL_SGMII2G5	0x4b32
/* Intel(R) Programmable Services Engine (Intel(R) PSE) consist of 2 MAC
 * which are named PSE0 and PSE1
 */
#define PCI_DEVICE_ID_INTEL_EHL_PSE0_RGMII1G	0x4ba0
#define PCI_DEVICE_ID_INTEL_EHL_PSE0_SGMII1G	0x4ba1
#define PCI_DEVICE_ID_INTEL_EHL_PSE0_SGMII2G5	0x4ba2
#define PCI_DEVICE_ID_INTEL_EHL_PSE1_RGMII1G	0x4bb0
#define PCI_DEVICE_ID_INTEL_EHL_PSE1_SGMII1G	0x4bb1
#define PCI_DEVICE_ID_INTEL_EHL_PSE1_SGMII2G5	0x4bb2
#define PCI_DEVICE_ID_INTEL_TGLH_SGMII1G_0	0x43ac
#define PCI_DEVICE_ID_INTEL_TGLH_SGMII1G_1	0x43a2
#define PCI_DEVICE_ID_INTEL_TGL_SGMII1G		0xa0ac
#define PCI_DEVICE_ID_INTEL_ADLS_SGMII1G_0	0x7aac
#define PCI_DEVICE_ID_INTEL_ADLS_SGMII1G_1	0x7aad

static const struct pci_device_id intel_eth_pci_id_table[] = {
	{ PCI_DEVICE_DATA(INTEL, QUARK, &quark_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_RGMII1G, &ehl_rgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_SGMII1G, &ehl_sgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_SGMII2G5, &ehl_sgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_PSE0_RGMII1G, &ehl_pse0_rgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_PSE0_SGMII1G, &ehl_pse0_sgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_PSE0_SGMII2G5, &ehl_pse0_sgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_PSE1_RGMII1G, &ehl_pse1_rgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_PSE1_SGMII1G, &ehl_pse1_sgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, EHL_PSE1_SGMII2G5, &ehl_pse1_sgmii1g_info) },
	{ PCI_DEVICE_DATA(INTEL, TGL_SGMII1G, &tgl_sgmii1g_phy0_info) },
	{ PCI_DEVICE_DATA(INTEL, TGLH_SGMII1G_0, &tgl_sgmii1g_phy0_info) },
	{ PCI_DEVICE_DATA(INTEL, TGLH_SGMII1G_1, &tgl_sgmii1g_phy1_info) },
	{ PCI_DEVICE_DATA(INTEL, ADLS_SGMII1G_0, &adls_sgmii1g_phy0_info) },
	{ PCI_DEVICE_DATA(INTEL, ADLS_SGMII1G_1, &adls_sgmii1g_phy1_info) },
	{}
};
MODULE_DEVICE_TABLE(pci, intel_eth_pci_id_table);

static struct pci_driver intel_eth_pci_driver = {
	.name = "intel-eth-pci",
	.id_table = intel_eth_pci_id_table,
	.probe = intel_eth_pci_probe,
	.remove = intel_eth_pci_remove,
	.driver         = {
		.pm     = &intel_eth_pm_ops,
	},
};

module_pci_driver(intel_eth_pci_driver);

MODULE_DESCRIPTION("INTEL 10/100/1000 Ethernet PCI driver");
MODULE_AUTHOR("Voon Weifeng <weifeng.voon@intel.com>");
MODULE_LICENSE("GPL v2");