C++ IXGBE_READ_REG函数代码示例

static s32 ixgbe_check_for_bit_pf(struct ixgbe_hw *hw, u32 mask, s32 index)
{
	u32 mbvficr = IXGBE_READ_REG(hw, IXGBE_MBVFICR(index));
	s32 ret_val = IXGBE_ERR_MBX;

	if (mbvficr & mask) {
		ret_val = IXGBE_SUCCESS;
		IXGBE_WRITE_REG(hw, IXGBE_MBVFICR(index), mask);
	}

	return ret_val;
}

/**
 * ixgbe_fcoe_ddp_put - free the ddp context for a given xid
 * @netdev: the corresponding net_device
 * @xid: the xid that corresponding ddp will be freed
 *
 * This is the implementation of net_device_ops.ndo_fcoe_ddp_done
 * and it is expected to be called by ULD, i.e., FCP layer of libfc
 * to release the corresponding ddp context when the I/O is done.
 *
 * Returns : data length already ddp-ed in bytes
 */
int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
{
	int len = 0;
	struct ixgbe_fcoe *fcoe;
	struct ixgbe_adapter *adapter;
	struct ixgbe_fcoe_ddp *ddp;
	u32 fcbuff;

	if (!netdev)
		goto out_ddp_put;

	if (xid >= IXGBE_FCOE_DDP_MAX)
		goto out_ddp_put;

	adapter = netdev_priv(netdev);
	fcoe = &adapter->fcoe;
	ddp = &fcoe->ddp[xid];
	if (!ddp->udl)
		goto out_ddp_put;

	len = ddp->len;
	/* if there an error, force to invalidate ddp context */
	if (ddp->err) {
		spin_lock_bh(&fcoe->lock);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLT, 0);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLTRW,
				(xid | IXGBE_FCFLTRW_WE));
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCBUFF, 0);
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW,
				(xid | IXGBE_FCDMARW_WE));

		/* guaranteed to be invalidated after 100us */
		IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW,
				(xid | IXGBE_FCDMARW_RE));
		fcbuff = IXGBE_READ_REG(&adapter->hw, IXGBE_FCBUFF);
		spin_unlock_bh(&fcoe->lock);
		if (fcbuff & IXGBE_FCBUFF_VALID)
			udelay(100);
	}
	if (ddp->sgl)
		dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc,
			     DMA_FROM_DEVICE);
	if (ddp->pool) {
		dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
		ddp->pool = NULL;
	}

	ixgbe_fcoe_clear_ddp(ddp);

out_ddp_put:
	return len;
}

/**
 * ixgbe_dcb_config_tx_data_arbiter_82598 - Config Tx data arbiter
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure Tx Data Arbiter and credits for each traffic class.
 */
s32 ixgbe_dcb_config_tx_data_arbiter_82598(struct ixgbe_hw *hw,
        u16 *refill,
        u16 *max,
        u8 *bwg_id,
        u8 *prio_type)
{
    u32 reg;
    u8 i;

    reg = IXGBE_READ_REG(hw, IXGBE_PDPMCS);
    /* Enable Data Plane Arbiter */
    reg &= ~IXGBE_PDPMCS_ARBDIS;
    /* Enable DFP and Transmit Recycle Mode */
    reg |= (IXGBE_PDPMCS_TPPAC | IXGBE_PDPMCS_TRM);

    IXGBE_WRITE_REG(hw, IXGBE_PDPMCS, reg);

    /* Configure traffic class credits and priority */
    for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
        reg = refill[i];
        reg |= (u32)(max[i]) << IXGBE_TDPT2TCCR_MCL_SHIFT;
        reg |= (u32)(bwg_id[i]) << IXGBE_TDPT2TCCR_BWG_SHIFT;

        if (prio_type[i] == prio_group)
            reg |= IXGBE_TDPT2TCCR_GSP;

        if (prio_type[i] == prio_link)
            reg |= IXGBE_TDPT2TCCR_LSP;

        IXGBE_WRITE_REG(hw, IXGBE_TDPT2TCCR(i), reg);
    }

    /* Enable Tx packet buffer division */
    reg = IXGBE_READ_REG(hw, IXGBE_DTXCTL);
    reg |= IXGBE_DTXCTL_ENDBUBD;
    IXGBE_WRITE_REG(hw, IXGBE_DTXCTL, reg);

    return 0;
}

/**
 * ixgbe_dcb_get_tc_stats_82599 - Returns status for each traffic class
 * @hw: pointer to hardware structure
 * @stats: pointer to statistics structure
 * @tc_count:  Number of elements in bwg_array.
 *
 * This function returns the status data for each of the Traffic Classes in use.
 */
s32 ixgbe_dcb_get_tc_stats_82599(struct ixgbe_hw *hw,
                                 struct ixgbe_hw_stats *stats,
                                 u8 tc_count)
{
	int tc;

	if (tc_count > MAX_TRAFFIC_CLASS)
		return DCB_ERR_PARAM;
	/* Statistics pertaining to each traffic class */
	for (tc = 0; tc < tc_count; tc++) {
		/* Transmitted Packets */
		stats->qptc[tc] += IXGBE_READ_REG(hw, IXGBE_QPTC(tc));
		/* Transmitted Bytes */
		stats->qbtc[tc] += IXGBE_READ_REG(hw, IXGBE_QBTC(tc));
		/* Received Packets */
		stats->qprc[tc] += IXGBE_READ_REG(hw, IXGBE_QPRC(tc));
		/* Received Bytes */
		stats->qbrc[tc] += IXGBE_READ_REG(hw, IXGBE_QBRC(tc));
	}

	return 0;
}

/**
 * ixgbe_ipsec_set_rx_item - set an Rx table item
 * @hw: hw specific details
 * @idx: register index to write
 * @tbl: table selector
 *
 * Trigger the device to store into a particular Rx table the
 * data that has already been loaded into the input register
 **/
static void ixgbe_ipsec_set_rx_item(struct ixgbe_hw *hw, u16 idx,
				    enum ixgbe_ipsec_tbl_sel tbl)
{
	u32 reg;

	reg = IXGBE_READ_REG(hw, IXGBE_IPSRXIDX);
	reg &= IXGBE_RXTXIDX_IPS_EN;
	reg |= tbl << IXGBE_RXIDX_TBL_SHIFT |
	       idx << IXGBE_RXTXIDX_IDX_SHIFT |
	       IXGBE_RXTXIDX_WRITE;
	IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, reg);
	IXGBE_WRITE_FLUSH(hw);
}

/**
 * ixgbe_dcb_config_pfc_82599 - Configure priority flow control
 * @hw: pointer to hardware structure
 * @dcb_config: pointer to ixgbe_dcb_config structure
 *
 * Configure Priority Flow Control (PFC) for each traffic class.
 */
s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw,
                               struct ixgbe_dcb_config *dcb_config)
{
	u32 i, reg;

	/* If PFC is disabled globally then fall back to LFC. */
	if (!dcb_config->pfc_mode_enable) {
		for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
			hw->mac.ops.setup_fc(hw, i);
		goto out;
	}

	/* Configure PFC Tx thresholds per TC */
	for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
		/* Config and remember Tx */
		if (dcb_config->tc_config[i].dcb_pfc == pfc_enabled_full ||
		    dcb_config->tc_config[i].dcb_pfc == pfc_enabled_tx) {
			reg = hw->fc.high_water | IXGBE_FCRTH_FCEN;
			IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), reg);
			reg = hw->fc.low_water | IXGBE_FCRTL_XONE;
			IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), reg);
		} else {
			IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(i), 0);
			IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(i), 0);
		}
	}

	/* Configure pause time (2 TCs per register) */
	reg = hw->fc.pause_time | (hw->fc.pause_time << 16);
	for (i = 0; i < (MAX_TRAFFIC_CLASS / 2); i++)
		IXGBE_WRITE_REG(hw, IXGBE_FCTTV(i), reg);

	/* Configure flow control refresh threshold value */
	IXGBE_WRITE_REG(hw, IXGBE_FCRTV, hw->fc.pause_time / 2);

	/* Enable Transmit PFC */
	reg = IXGBE_FCCFG_TFCE_PRIORITY;
	IXGBE_WRITE_REG(hw, IXGBE_FCCFG, reg);

	/*
	 * Enable Receive PFC
	 * We will always honor XOFF frames we receive when
	 * we are in PFC mode.
	 */
	reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
	reg &= ~IXGBE_MFLCN_RFCE;
	reg |= IXGBE_MFLCN_RPFCE;
	IXGBE_WRITE_REG(hw, IXGBE_MFLCN, reg);
out:
	return 0;
}

/**
 *  ixgbe_get_link_capabilities_82598 - Determines link capabilities
 *  @hw: pointer to hardware structure
 *  @speed: pointer to link speed
 *  @autoneg: boolean auto-negotiation value
 *
 *  Determines the link capabilities by reading the AUTOC register.
 **/
static s32 ixgbe_get_link_capabilities_82598(struct ixgbe_hw *hw,
                                             ixgbe_link_speed *speed,
                                             bool *autoneg)
{
	s32 status = 0;
	u32 autoc = 0;

	/*
	 * Determine link capabilities based on the stored value of AUTOC,
	 * which represents EEPROM defaults.  If AUTOC value has not been
	 * stored, use the current register value.
	 */
	if (hw->mac.orig_link_settings_stored)
		autoc = hw->mac.orig_autoc;
	else
		autoc = IXGBE_READ_REG(hw, IXGBE_AUTOC);

	switch (autoc & IXGBE_AUTOC_LMS_MASK) {
	case IXGBE_AUTOC_LMS_1G_LINK_NO_AN:
		*speed = IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = false;
		break;

	case IXGBE_AUTOC_LMS_10G_LINK_NO_AN:
		*speed = IXGBE_LINK_SPEED_10GB_FULL;
		*autoneg = false;
		break;

	case IXGBE_AUTOC_LMS_1G_AN:
		*speed = IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = true;
		break;

	case IXGBE_AUTOC_LMS_KX4_AN:
	case IXGBE_AUTOC_LMS_KX4_AN_1G_AN:
		*speed = IXGBE_LINK_SPEED_UNKNOWN;
		if (autoc & IXGBE_AUTOC_KX4_SUPP)
			*speed |= IXGBE_LINK_SPEED_10GB_FULL;
		if (autoc & IXGBE_AUTOC_KX_SUPP)
			*speed |= IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = true;
		break;

	default:
		status = IXGBE_ERR_LINK_SETUP;
		break;
	}

	return status;
}

/**
 * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
 * @hw: pointer to the HW structure
 * @max_size: value to assign to max frame size
 * Hyper-V variant.
 **/
s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
{
	u32 reg;

	/* If we are on Hyper-V, we implement this functionality
	 * differently.
	 */
	reg =  IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
	/* CRC == 4 */
	reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
	IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);

	return IXGBE_SUCCESS;
}

/**
 *  ixgbe_obtain_mbx_lock_pf - obtain mailbox lock
 *  @hw: pointer to the HW structure
 *  @vf_number: the VF index
 *
 *  return SUCCESS if we obtained the mailbox lock
 **/
static s32 ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_number)
{
	u32 p2v_mailbox;

	/* Take ownership of the buffer */
	IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_PFU);

	/* reserve mailbox for vf use */
	p2v_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_number));
	if (p2v_mailbox & IXGBE_PFMAILBOX_PFU)
		return 0;

	return IXGBE_ERR_MBX;
}

static int ixgbe_txbpacks(char *page, char **start, off_t off,
			  int count, int *eof, void *data)
{
	struct ixgbe_hw *hw;
	struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
	if (adapter == NULL)
		return snprintf(page, count, "error: no adapter\n");

	hw = &adapter->hw;
	if (hw == NULL)
		return snprintf(page, count, "error: no hw data\n");

	return snprintf(page, count, "%d\n", IXGBE_READ_REG(hw, IXGBE_BPTC));
}

/**
 *  ixgbe_get_link_capabilities_82598 - Determines link capabilities
 *  @hw: pointer to hardware structure
 *  @speed: pointer to link speed
 *  @autoneg: intean auto-negotiation value
 *
 *  Determines the link capabilities by reading the AUTOC register.
 **/
int32_t ixgbe_get_link_capabilities_82598(struct ixgbe_hw *hw,
                                      ixgbe_link_speed *speed,
                                      int *autoneg)
{
	int32_t status = IXGBE_SUCCESS;
	int32_t autoc_reg;

	autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);

	if (hw->mac.link_settings_loaded) {
		autoc_reg &= ~IXGBE_AUTOC_LMS_ATTACH_TYPE;
		autoc_reg &= ~IXGBE_AUTOC_LMS_MASK;
		autoc_reg |= hw->mac.link_attach_type;
		autoc_reg |= hw->mac.link_mode_select;
	}

	switch (autoc_reg & IXGBE_AUTOC_LMS_MASK) {
	case IXGBE_AUTOC_LMS_1G_LINK_NO_AN:
		*speed = IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = FALSE;
		break;

	case IXGBE_AUTOC_LMS_10G_LINK_NO_AN:
		*speed = IXGBE_LINK_SPEED_10GB_FULL;
		*autoneg = FALSE;
		break;

	case IXGBE_AUTOC_LMS_1G_AN:
		*speed = IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = TRUE;
		break;

	case IXGBE_AUTOC_LMS_KX4_AN:
	case IXGBE_AUTOC_LMS_KX4_AN_1G_AN:
		*speed = IXGBE_LINK_SPEED_UNKNOWN;
		if (autoc_reg & IXGBE_AUTOC_KX4_SUPP)
			*speed |= IXGBE_LINK_SPEED_10GB_FULL;
		if (autoc_reg & IXGBE_AUTOC_KX_SUPP)
			*speed |= IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = TRUE;
		break;

	default:
		status = IXGBE_ERR_LINK_SETUP;
		break;
	}

	return status;
}

static int ixgbe_rxmpacks(char *page, char __always_unused **start,
			  off_t __always_unused off, int count,
			  int __always_unused *eof, void *data)
{
	struct ixgbe_hw *hw;
	struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
	if (adapter == NULL)
		return snprintf(page, count, "error: no adapter\n");

	hw = &adapter->hw;
	if (hw == NULL)
		return snprintf(page, count, "error: no hw data\n");

	return snprintf(page, count, "%d\n", IXGBE_READ_REG(hw, IXGBE_MPRC));
}

/**
 * ixgbe_ptp_tx_hwtstamp - utility function which checks for TX time stamp
 * @q_vector: structure containing interrupt and ring information
 * @skb: particular skb to send timestamp with
 *
 * if the timestamp is valid, we convert it into the timecounter ns
 * value, then store that result into the shhwtstamps structure which
 * is passed up the network stack
 */
void ixgbe_ptp_tx_hwtstamp(struct ixgbe_q_vector *q_vector,
			   struct sk_buff *skb)
{
	struct ixgbe_adapter *adapter;
	struct ixgbe_hw *hw;
	struct skb_shared_hwtstamps shhwtstamps;
	u64 regval = 0, ns;
	u32 tsynctxctl;
	unsigned long flags;

	/* we cannot process timestamps on a ring without a q_vector */
	if (!q_vector || !q_vector->adapter)
		return;

	adapter = q_vector->adapter;
	hw = &adapter->hw;

	tsynctxctl = IXGBE_READ_REG(hw, IXGBE_TSYNCTXCTL);
	regval |= (u64)IXGBE_READ_REG(hw, IXGBE_TXSTMPL);
	regval |= (u64)IXGBE_READ_REG(hw, IXGBE_TXSTMPH) << 32;

	/*
	 * if TX timestamp is not valid, exit after clearing the
	 * timestamp registers
	 */
	if (!(tsynctxctl & IXGBE_TSYNCTXCTL_VALID))
		return;

	spin_lock_irqsave(&adapter->tmreg_lock, flags);
	ns = timecounter_cyc2time(&adapter->tc, regval);
	spin_unlock_irqrestore(&adapter->tmreg_lock, flags);

	memset(&shhwtstamps, 0, sizeof(shhwtstamps));
	shhwtstamps.hwtstamp = ns_to_ktime(ns);
	skb_tstamp_tx(skb, &shhwtstamps);
}

/**
 * ixgbe_dcb_config_tc_stats_82598 - Configure traffic class statistics
 * @hw: pointer to hardware structure
 *
 * Configure queue statistics registers, all queues belonging to same traffic
 * class uses a single set of queue statistics counters.
 */
static s32 ixgbe_dcb_config_tc_stats_82598(struct ixgbe_hw *hw)
{
    u32 reg = 0;
    u8  i   = 0;
    u8  j   = 0;

    /* Receive Queues stats setting -  8 queues per statistics reg */
    for (i = 0, j = 0; i < 15 && j < 8; i = i + 2, j++) {
        reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i));
        reg |= ((0x1010101) * j);
        IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i), reg);
        reg = IXGBE_READ_REG(hw, IXGBE_RQSMR(i + 1));
        reg |= ((0x1010101) * j);
        IXGBE_WRITE_REG(hw, IXGBE_RQSMR(i + 1), reg);
    }
    /* Transmit Queues stats setting -  4 queues per statistics reg */
    for (i = 0; i < 8; i++) {
        reg = IXGBE_READ_REG(hw, IXGBE_TQSMR(i));
        reg |= ((0x1010101) * i);
        IXGBE_WRITE_REG(hw, IXGBE_TQSMR(i), reg);
    }

    return 0;
}

/**
 *  ixgbe_get_link_settings_82598 - Determines default link settings
 *  @hw: pointer to hardware structure
 *  @speed: pointer to link speed
 *  @autoneg: boolean auto-negotiation value
 *
 *  Determines the default link settings by reading the AUTOC register.
 **/
static s32 ixgbe_get_link_settings_82598(struct ixgbe_hw *hw, u32 *speed,
					 bool *autoneg)
{
	s32 status = 0;
	s32 autoc_reg;

	autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);

	if (hw->mac.link_settings_loaded) {
		autoc_reg &= ~IXGBE_AUTOC_LMS_ATTACH_TYPE;
		autoc_reg &= ~IXGBE_AUTOC_LMS_MASK;
		autoc_reg |= hw->mac.link_attach_type;
		autoc_reg |= hw->mac.link_mode_select;
	}

	switch (autoc_reg & IXGBE_AUTOC_LMS_MASK) {
	case IXGBE_AUTOC_LMS_1G_LINK_NO_AN:
		*speed = IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = false;
		break;

	case IXGBE_AUTOC_LMS_10G_LINK_NO_AN:
		*speed = IXGBE_LINK_SPEED_10GB_FULL;
		*autoneg = false;
		break;

	case IXGBE_AUTOC_LMS_1G_AN:
		*speed = IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = true;
		break;

	case IXGBE_AUTOC_LMS_KX4_AN:
	case IXGBE_AUTOC_LMS_KX4_AN_1G_AN:
		*speed = IXGBE_LINK_SPEED_UNKNOWN;
		if (autoc_reg & IXGBE_AUTOC_KX4_SUPP)
			*speed |= IXGBE_LINK_SPEED_10GB_FULL;
		if (autoc_reg & IXGBE_AUTOC_KX_SUPP)
			*speed |= IXGBE_LINK_SPEED_1GB_FULL;
		*autoneg = true;
		break;

	default:
		status = IXGBE_ERR_LINK_SETUP;
		break;
	}

	return status;
}