Release 4.11 drivers/net/ethernet/intel/fm10k/fm10k_vf.c

/* Intel(R) Ethernet Switch Host Interface Driver
 * Copyright(c) 2013 - 2016 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 */

#include "fm10k_vf.h"

/**
 *  fm10k_stop_hw_vf - Stop Tx/Rx units
 *  @hw: pointer to hardware structure
 *
 **/


static s32 fm10k_stop_hw_vf(struct fm10k_hw *hw)
{
	u8 *perm_addr = hw->mac.perm_addr;
	u32 bal = 0, bah = 0, tdlen;
	s32 err;
	u16 i;

	/* we need to disable the queues before taking further steps */
	err = fm10k_stop_hw_generic(hw);
	if (err && err != FM10K_ERR_REQUESTS_PENDING)
		return err;

	/* If permanent address is set then we need to restore it */
	if (is_valid_ether_addr(perm_addr)) {
		bal = (((u32)perm_addr[3]) << 24) |
		      (((u32)perm_addr[4]) << 16) |
		      (((u32)perm_addr[5]) << 8);
		bah = (((u32)0xFF)	   << 24) |
		      (((u32)perm_addr[0]) << 16) |
		      (((u32)perm_addr[1]) << 8) |
		       ((u32)perm_addr[2]);
	}

	/* restore default itr_scale for next VF initialization */
	tdlen = hw->mac.itr_scale << FM10K_TDLEN_ITR_SCALE_SHIFT;

	/* The queues have already been disabled so we just need to
         * update their base address registers
         */
	for (i = 0; i < hw->mac.max_queues; i++) {
		fm10k_write_reg(hw, FM10K_TDBAL(i), bal);
		fm10k_write_reg(hw, FM10K_TDBAH(i), bah);
		fm10k_write_reg(hw, FM10K_RDBAL(i), bal);
		fm10k_write_reg(hw, FM10K_RDBAH(i), bah);
		/* Restore ITR scale in software-defined mechanism in TDLEN
                 * for next VF initialization. See definition of
                 * FM10K_TDLEN_ITR_SCALE_SHIFT for more details on the use of
                 * TDLEN here.
                 */
		fm10k_write_reg(hw, FM10K_TDLEN(i), tdlen);
	}

	return err;
}

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/**
 *  fm10k_reset_hw_vf - VF hardware reset
 *  @hw: pointer to hardware structure
 *
 *  This function should return the hardware to a state similar to the
 *  one it is in after just being initialized.
 **/


static s32 fm10k_reset_hw_vf(struct fm10k_hw *hw)
{
	s32 err;

	/* shut down queues we own and reset DMA configuration */
	err = fm10k_stop_hw_vf(hw);
	if (err == FM10K_ERR_REQUESTS_PENDING)
		hw->mac.reset_while_pending++;
	else if (err)
		return err;

	/* Inititate VF reset */
	fm10k_write_reg(hw, FM10K_VFCTRL, FM10K_VFCTRL_RST);

	/* Flush write and allow 100us for reset to complete */
	fm10k_write_flush(hw);
	udelay(FM10K_RESET_TIMEOUT);

	/* Clear reset bit and verify it was cleared */
	fm10k_write_reg(hw, FM10K_VFCTRL, 0);
	if (fm10k_read_reg(hw, FM10K_VFCTRL) & FM10K_VFCTRL_RST)
		return FM10K_ERR_RESET_FAILED;

	return 0;
}

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/**
 *  fm10k_init_hw_vf - VF hardware initialization
 *  @hw: pointer to hardware structure
 *
 **/


static s32 fm10k_init_hw_vf(struct fm10k_hw *hw)
{
	u32 tqdloc, tqdloc0 = ~fm10k_read_reg(hw, FM10K_TQDLOC(0));
	s32 err;
	u16 i;

	/* verify we have at least 1 queue */
	if (!~fm10k_read_reg(hw, FM10K_TXQCTL(0)) ||
	    !~fm10k_read_reg(hw, FM10K_RXQCTL(0))) {
		err = FM10K_ERR_NO_RESOURCES;
		goto reset_max_queues;
	}

	/* determine how many queues we have */
	for (i = 1; tqdloc0 && (i < FM10K_MAX_QUEUES_POOL); i++) {
		/* verify the Descriptor cache offsets are increasing */
		tqdloc = ~fm10k_read_reg(hw, FM10K_TQDLOC(i));
		if (!tqdloc || (tqdloc == tqdloc0))
			break;

		/* check to verify the PF doesn't own any of our queues */
		if (!~fm10k_read_reg(hw, FM10K_TXQCTL(i)) ||
		    !~fm10k_read_reg(hw, FM10K_RXQCTL(i)))
			break;
	}

	/* shut down queues we own and reset DMA configuration */
	err = fm10k_disable_queues_generic(hw, i);
	if (err)
		goto reset_max_queues;

	/* record maximum queue count */
	hw->mac.max_queues = i;

	/* fetch default VLAN and ITR scale */
	hw->mac.default_vid = (fm10k_read_reg(hw, FM10K_TXQCTL(0)) &
			       FM10K_TXQCTL_VID_MASK) >> FM10K_TXQCTL_VID_SHIFT;
	/* Read the ITR scale from TDLEN. See the definition of
         * FM10K_TDLEN_ITR_SCALE_SHIFT for more information about how TDLEN is
         * used here.
         */
	hw->mac.itr_scale = (fm10k_read_reg(hw, FM10K_TDLEN(0)) &
			     FM10K_TDLEN_ITR_SCALE_MASK) >>
			    FM10K_TDLEN_ITR_SCALE_SHIFT;

	return 0;

reset_max_queues:
	hw->mac.max_queues = 0;

	return err;
}

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/* This structure defines the attibutes to be parsed below */

const struct fm10k_tlv_attr fm10k_mac_vlan_msg_attr[] = {
	FM10K_TLV_ATTR_U32(FM10K_MAC_VLAN_MSG_VLAN),
	FM10K_TLV_ATTR_BOOL(FM10K_MAC_VLAN_MSG_SET),
	FM10K_TLV_ATTR_MAC_ADDR(FM10K_MAC_VLAN_MSG_MAC),
	FM10K_TLV_ATTR_MAC_ADDR(FM10K_MAC_VLAN_MSG_DEFAULT_MAC),
	FM10K_TLV_ATTR_MAC_ADDR(FM10K_MAC_VLAN_MSG_MULTICAST),
	FM10K_TLV_ATTR_LAST
};

/**
 *  fm10k_update_vlan_vf - Update status of VLAN ID in VLAN filter table
 *  @hw: pointer to hardware structure
 *  @vid: VLAN ID to add to table
 *  @vsi: Reserved, should always be 0
 *  @set: Indicates if this is a set or clear operation
 *
 *  This function adds or removes the corresponding VLAN ID from the VLAN
 *  filter table for this VF.
 **/


static s32 fm10k_update_vlan_vf(struct fm10k_hw *hw, u32 vid, u8 vsi, bool set)
{
	struct fm10k_mbx_info *mbx = &hw->mbx;
	u32 msg[4];

	/* verify the index is not set */
	if (vsi)
		return FM10K_ERR_PARAM;

	/* clever trick to verify reserved bits in both vid and length */
	if ((vid << 16 | vid) >> 28)
		return FM10K_ERR_PARAM;

	/* encode set bit into the VLAN ID */
	if (!set)
		vid |= FM10K_VLAN_CLEAR;

	/* generate VLAN request */
	fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_MAC_VLAN);
	fm10k_tlv_attr_put_u32(msg, FM10K_MAC_VLAN_MSG_VLAN, vid);

	/* load onto outgoing mailbox */
	return mbx->ops.enqueue_tx(hw, mbx, msg);
}

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/**
 *  fm10k_msg_mac_vlan_vf - Read device MAC address from mailbox message
 *  @hw: pointer to the HW structure
 *  @results: Attributes for message
 *  @mbx: unused mailbox data
 *
 *  This function should determine the MAC address for the VF
 **/


s32 fm10k_msg_mac_vlan_vf(struct fm10k_hw *hw, u32 **results,
			  struct fm10k_mbx_info *mbx)
{
	u8 perm_addr[ETH_ALEN];
	u16 vid;
	s32 err;

	/* record MAC address requested */
	err = fm10k_tlv_attr_get_mac_vlan(
					results[FM10K_MAC_VLAN_MSG_DEFAULT_MAC],
					perm_addr, &vid);
	if (err)
		return err;

	ether_addr_copy(hw->mac.perm_addr, perm_addr);
	hw->mac.default_vid = vid & (FM10K_VLAN_TABLE_VID_MAX - 1);
	hw->mac.vlan_override = !!(vid & FM10K_VLAN_OVERRIDE);

	return 0;
}

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/**
 *  fm10k_read_mac_addr_vf - Read device MAC address
 *  @hw: pointer to the HW structure
 *
 *  This function should determine the MAC address for the VF
 **/


static s32 fm10k_read_mac_addr_vf(struct fm10k_hw *hw)
{
	u8 perm_addr[ETH_ALEN];
	u32 base_addr;

	base_addr = fm10k_read_reg(hw, FM10K_TDBAL(0));

	/* last byte should be 0 */
	if (base_addr << 24)
		return  FM10K_ERR_INVALID_MAC_ADDR;

	perm_addr[3] = (u8)(base_addr >> 24);
	perm_addr[4] = (u8)(base_addr >> 16);
	perm_addr[5] = (u8)(base_addr >> 8);

	base_addr = fm10k_read_reg(hw, FM10K_TDBAH(0));

	/* first byte should be all 1's */
	if ((~base_addr) >> 24)
		return  FM10K_ERR_INVALID_MAC_ADDR;

	perm_addr[0] = (u8)(base_addr >> 16);
	perm_addr[1] = (u8)(base_addr >> 8);
	perm_addr[2] = (u8)(base_addr);

	ether_addr_copy(hw->mac.perm_addr, perm_addr);
	ether_addr_copy(hw->mac.addr, perm_addr);

	return 0;
}

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/**
 *  fm10k_update_uc_addr_vf - Update device unicast addresses
 *  @hw: pointer to the HW structure
 *  @glort: unused
 *  @mac: MAC address to add/remove from table
 *  @vid: VLAN ID to add/remove from table
 *  @add: Indicates if this is an add or remove operation
 *  @flags: flags field to indicate add and secure - unused
 *
 *  This function is used to add or remove unicast MAC addresses for
 *  the VF.
 **/


static s32 fm10k_update_uc_addr_vf(struct fm10k_hw *hw, u16 glort,
				   const u8 *mac, u16 vid, bool add, u8 flags)
{
	struct fm10k_mbx_info *mbx = &hw->mbx;
	u32 msg[7];

	/* verify VLAN ID is valid */
	if (vid >= FM10K_VLAN_TABLE_VID_MAX)
		return FM10K_ERR_PARAM;

	/* verify MAC address is valid */
	if (!is_valid_ether_addr(mac))
		return FM10K_ERR_PARAM;

	/* verify we are not locked down on the MAC address */
	if (is_valid_ether_addr(hw->mac.perm_addr) &&
	    !ether_addr_equal(hw->mac.perm_addr, mac))
		return FM10K_ERR_PARAM;

	/* add bit to notify us if this is a set or clear operation */
	if (!add)
		vid |= FM10K_VLAN_CLEAR;

	/* generate VLAN request */
	fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_MAC_VLAN);
	fm10k_tlv_attr_put_mac_vlan(msg, FM10K_MAC_VLAN_MSG_MAC, mac, vid);

	/* load onto outgoing mailbox */
	return mbx->ops.enqueue_tx(hw, mbx, msg);
}

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/**
 *  fm10k_update_mc_addr_vf - Update device multicast addresses
 *  @hw: pointer to the HW structure
 *  @glort: unused
 *  @mac: MAC address to add/remove from table
 *  @vid: VLAN ID to add/remove from table
 *  @add: Indicates if this is an add or remove operation
 *
 *  This function is used to add or remove multicast MAC addresses for
 *  the VF.
 **/


static s32 fm10k_update_mc_addr_vf(struct fm10k_hw *hw, u16 glort,
				   const u8 *mac, u16 vid, bool add)
{
	struct fm10k_mbx_info *mbx = &hw->mbx;
	u32 msg[7];

	/* verify VLAN ID is valid */
	if (vid >= FM10K_VLAN_TABLE_VID_MAX)
		return FM10K_ERR_PARAM;

	/* verify multicast address is valid */
	if (!is_multicast_ether_addr(mac))
		return FM10K_ERR_PARAM;

	/* add bit to notify us if this is a set or clear operation */
	if (!add)
		vid |= FM10K_VLAN_CLEAR;

	/* generate VLAN request */
	fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_MAC_VLAN);
	fm10k_tlv_attr_put_mac_vlan(msg, FM10K_MAC_VLAN_MSG_MULTICAST,
				    mac, vid);

	/* load onto outgoing mailbox */
	return mbx->ops.enqueue_tx(hw, mbx, msg);
}

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/**
 *  fm10k_update_int_moderator_vf - Request update of interrupt moderator list
 *  @hw: pointer to hardware structure
 *
 *  This function will issue a request to the PF to rescan our MSI-X table
 *  and to update the interrupt moderator linked list.
 **/


static void fm10k_update_int_moderator_vf(struct fm10k_hw *hw)
{
	struct fm10k_mbx_info *mbx = &hw->mbx;
	u32 msg[1];

	/* generate MSI-X request */
	fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_MSIX);

	/* load onto outgoing mailbox */
	mbx->ops.enqueue_tx(hw, mbx, msg);
}

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/* This structure defines the attibutes to be parsed below */

const struct fm10k_tlv_attr fm10k_lport_state_msg_attr[] = {
	FM10K_TLV_ATTR_BOOL(FM10K_LPORT_STATE_MSG_DISABLE),
	FM10K_TLV_ATTR_U8(FM10K_LPORT_STATE_MSG_XCAST_MODE),
	FM10K_TLV_ATTR_BOOL(FM10K_LPORT_STATE_MSG_READY),
	FM10K_TLV_ATTR_LAST
};

/**
 *  fm10k_msg_lport_state_vf - Message handler for lport_state message from PF
 *  @hw: Pointer to hardware structure
 *  @results: pointer array containing parsed data
 *  @mbx: Pointer to mailbox information structure
 *
 *  This handler is meant to capture the indication from the PF that we
 *  are ready to bring up the interface.
 **/


s32 fm10k_msg_lport_state_vf(struct fm10k_hw *hw, u32 **results,
			     struct fm10k_mbx_info *mbx)
{
	hw->mac.dglort_map = !results[FM10K_LPORT_STATE_MSG_READY] ?
			     FM10K_DGLORTMAP_NONE : FM10K_DGLORTMAP_ZERO;

	return 0;
}

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/**
 *  fm10k_update_lport_state_vf - Update device state in lower device
 *  @hw: pointer to the HW structure
 *  @glort: unused
 *  @count: number of logical ports to enable - unused (always 1)
 *  @enable: boolean value indicating if this is an enable or disable request
 *
 *  Notify the lower device of a state change.  If the lower device is
 *  enabled we can add filters, if it is disabled all filters for this
 *  logical port are flushed.
 **/


static s32 fm10k_update_lport_state_vf(struct fm10k_hw *hw, u16 glort,
				       u16 count, bool enable)
{
	struct fm10k_mbx_info *mbx = &hw->mbx;
	u32 msg[2];

	/* reset glort mask 0 as we have to wait to be enabled */
	hw->mac.dglort_map = FM10K_DGLORTMAP_NONE;

	/* generate port state request */
	fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_LPORT_STATE);
	if (!enable)
		fm10k_tlv_attr_put_bool(msg, FM10K_LPORT_STATE_MSG_DISABLE);

	/* load onto outgoing mailbox */
	return mbx->ops.enqueue_tx(hw, mbx, msg);
}

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/**
 *  fm10k_update_xcast_mode_vf - Request update of multicast mode
 *  @hw: pointer to hardware structure
 *  @glort: unused
 *  @mode: integer value indicating mode being requested
 *
 *  This function will attempt to request a higher mode for the port
 *  so that it can enable either multicast, multicast promiscuous, or
 *  promiscuous mode of operation.
 **/


static s32 fm10k_update_xcast_mode_vf(struct fm10k_hw *hw, u16 glort, u8 mode)
{
	struct fm10k_mbx_info *mbx = &hw->mbx;
	u32 msg[3];

	if (mode > FM10K_XCAST_MODE_NONE)
		return FM10K_ERR_PARAM;

	/* generate message requesting to change xcast mode */
	fm10k_tlv_msg_init(msg, FM10K_VF_MSG_ID_LPORT_STATE);
	fm10k_tlv_attr_put_u8(msg, FM10K_LPORT_STATE_MSG_XCAST_MODE, mode);

	/* load onto outgoing mailbox */
	return mbx->ops.enqueue_tx(hw, mbx, msg);
}

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/**
 *  fm10k_update_hw_stats_vf - Updates hardware related statistics of VF
 *  @hw: pointer to hardware structure
 *  @stats: pointer to statistics structure
 *
 *  This function collects and aggregates per queue hardware statistics.
 **/


static void fm10k_update_hw_stats_vf(struct fm10k_hw *hw,
				     struct fm10k_hw_stats *stats)
{
	fm10k_update_hw_stats_q(hw, stats->q, 0, hw->mac.max_queues);
}

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/**
 *  fm10k_rebind_hw_stats_vf - Resets base for hardware statistics of VF
 *  @hw: pointer to hardware structure
 *  @stats: pointer to the stats structure to update
 *
 *  This function resets the base for queue hardware statistics.
 **/


static void fm10k_rebind_hw_stats_vf(struct fm10k_hw *hw,
				     struct fm10k_hw_stats *stats)
{
	/* Unbind Queue Statistics */
	fm10k_unbind_hw_stats_q(stats->q, 0, hw->mac.max_queues);

	/* Reinitialize bases for all stats */
	fm10k_update_hw_stats_vf(hw, stats);
}

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/**
 *  fm10k_configure_dglort_map_vf - Configures GLORT entry and queues
 *  @hw: pointer to hardware structure
 *  @dglort: pointer to dglort configuration structure
 *
 *  Reads the configuration structure contained in dglort_cfg and uses
 *  that information to then populate a DGLORTMAP/DEC entry and the queues
 *  to which it has been assigned.
 **/


static s32 fm10k_configure_dglort_map_vf(struct fm10k_hw *hw,
					 struct fm10k_dglort_cfg *dglort)
{
	/* verify the dglort pointer */
	if (!dglort)
		return FM10K_ERR_PARAM;

	/* stub for now until we determine correct message for this */

	return 0;
}

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static const struct fm10k_msg_data fm10k_msg_data_vf[] = {
	FM10K_TLV_MSG_TEST_HANDLER(fm10k_tlv_msg_test),
	FM10K_VF_MSG_MAC_VLAN_HANDLER(fm10k_msg_mac_vlan_vf),
	FM10K_VF_MSG_LPORT_STATE_HANDLER(fm10k_msg_lport_state_vf),
	FM10K_TLV_MSG_ERROR_HANDLER(fm10k_tlv_msg_error),
};


static const struct fm10k_mac_ops mac_ops_vf = {
	.get_bus_info		= fm10k_get_bus_info_generic,
	.reset_hw		= fm10k_reset_hw_vf,
	.init_hw		= fm10k_init_hw_vf,
	.start_hw		= fm10k_start_hw_generic,
	.stop_hw		= fm10k_stop_hw_vf,
	.update_vlan		= fm10k_update_vlan_vf,
	.read_mac_addr		= fm10k_read_mac_addr_vf,
	.update_uc_addr		= fm10k_update_uc_addr_vf,
	.update_mc_addr		= fm10k_update_mc_addr_vf,
	.update_xcast_mode	= fm10k_update_xcast_mode_vf,
	.update_int_moderator	= fm10k_update_int_moderator_vf,
	.update_lport_state	= fm10k_update_lport_state_vf,
	.update_hw_stats	= fm10k_update_hw_stats_vf,
	.rebind_hw_stats	= fm10k_rebind_hw_stats_vf,
	.configure_dglort_map	= fm10k_configure_dglort_map_vf,
	.get_host_state		= fm10k_get_host_state_generic,
};



static s32 fm10k_get_invariants_vf(struct fm10k_hw *hw)
{
	fm10k_get_invariants_generic(hw);

	return fm10k_pfvf_mbx_init(hw, &hw->mbx, fm10k_msg_data_vf, 0);
}

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100.00%


const struct fm10k_info fm10k_vf_info = {
	.mac		= fm10k_mac_vf,
	.get_invariants	= fm10k_get_invariants_vf,
	.mac_ops	= &mac_ops_vf,
};
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Alexander Duyck
1632
91.07%
1
8.33%
Jacob E Keller
130
7.25%
8
66.67%
Jeff Kirsher
22
1.23%
1
8.33%
Matthew Vick
6
0.33%
1
8.33%
Bruce W Allan
2
0.11%
1
8.33%
Total
1792
100.00%
12
100.00%
Directory: drivers/net/ethernet/intel/fm10k

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