/* Intel Ethernet Switch Host Interface Driver
* Copyright(c) 2013 - 2014 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.h"
/**
* fm10k_request_glort_range - Request GLORTs for use in configuring rules
* @interface: board private structure
*
* This function allocates a range of glorts for this inteface to use.
**/
static void fm10k_request_glort_range(struct fm10k_intfc *interface)
{
struct fm10k_hw *hw = &interface->hw;
u16 mask = (~hw->mac.dglort_map) >> FM10K_DGLORTMAP_MASK_SHIFT;
/* establish GLORT base */
interface->glort = hw->mac.dglort_map & FM10K_DGLORTMAP_NONE;
interface->glort_count = 0;
/* nothing we can do until mask is allocated */
if (hw->mac.dglort_map == FM10K_DGLORTMAP_NONE)
return;
interface->glort_count = mask + 1;
}
/**
* fm10k_open - Called when a network interface is made active
* @netdev: network interface device structure
*
* Returns 0 on success, negative value on failure
*
* The open entry point is called when a network interface is made
* active by the system (IFF_UP). At this point all resources needed
* for transmit and receive operations are allocated, the interrupt
* handler is registered with the OS, the watchdog timer is started,
* and the stack is notified that the interface is ready.
**/
int fm10k_open(struct net_device *netdev)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
int err;
/* allocate interrupt resources */
err = fm10k_qv_request_irq(interface);
if (err)
goto err_req_irq;
/* setup GLORT assignment for this port */
fm10k_request_glort_range(interface);
/* Notify the stack of the actual queue counts */
err = netif_set_real_num_rx_queues(netdev,
interface->num_rx_queues);
if (err)
goto err_set_queues;
fm10k_up(interface);
return 0;
err_set_queues:
fm10k_qv_free_irq(interface);
err_req_irq:
return err;
}
/**
* fm10k_close - Disables a network interface
* @netdev: network interface device structure
*
* Returns 0, this is not allowed to fail
*
* The close entry point is called when an interface is de-activated
* by the OS. The hardware is still under the drivers control, but
* needs to be disabled. A global MAC reset is issued to stop the
* hardware, and all transmit and receive resources are freed.
**/
int fm10k_close(struct net_device *netdev)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
fm10k_down(interface);
fm10k_qv_free_irq(interface);
return 0;
}
static netdev_tx_t fm10k_xmit_frame(struct sk_buff *skb, struct net_device *dev)
{
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
static int fm10k_change_mtu(struct net_device *dev, int new_mtu)
{
if (new_mtu < 68 || new_mtu > FM10K_MAX_JUMBO_FRAME_SIZE)
return -EINVAL;
dev->mtu = new_mtu;
return 0;
}
static int fm10k_uc_vlan_unsync(struct net_device *netdev,
const unsigned char *uc_addr)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
struct fm10k_hw *hw = &interface->hw;
u16 glort = interface->glort;
u16 vid = interface->vid;
bool set = !!(vid / VLAN_N_VID);
int err;
/* drop any leading bits on the VLAN ID */
vid &= VLAN_N_VID - 1;
err = hw->mac.ops.update_uc_addr(hw, glort, uc_addr, vid, set, 0);
if (err)
return err;
/* return non-zero value as we are only doing a partial sync/unsync */
return 1;
}
static int fm10k_mc_vlan_unsync(struct net_device *netdev,
const unsigned char *mc_addr)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
struct fm10k_hw *hw = &interface->hw;
u16 glort = interface->glort;
u16 vid = interface->vid;
bool set = !!(vid / VLAN_N_VID);
int err;
/* drop any leading bits on the VLAN ID */
vid &= VLAN_N_VID - 1;
err = hw->mac.ops.update_mc_addr(hw, glort, mc_addr, vid, set);
if (err)
return err;
/* return non-zero value as we are only doing a partial sync/unsync */
return 1;
}
static int fm10k_update_vid(struct net_device *netdev, u16 vid, bool set)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
struct fm10k_hw *hw = &interface->hw;
s32 err;
/* updates do not apply to VLAN 0 */
if (!vid)
return 0;
if (vid >= VLAN_N_VID)
return -EINVAL;
/* Verify we have permission to add VLANs */
if (hw->mac.vlan_override)
return -EACCES;
/* if default VLAN is already present do nothing */
if (vid == hw->mac.default_vid)
return -EBUSY;
/* update active_vlans bitmask */
set_bit(vid, interface->active_vlans);
if (!set)
clear_bit(vid, interface->active_vlans);
fm10k_mbx_lock(interface);
/* only need to update the VLAN if not in promiscous mode */
if (!(netdev->flags & IFF_PROMISC)) {
err = hw->mac.ops.update_vlan(hw, vid, 0, set);
if (err)
return err;
}
/* update our base MAC address */
err = hw->mac.ops.update_uc_addr(hw, interface->glort, hw->mac.addr,
vid, set, 0);
if (err)
return err;
/* set vid prior to syncing/unsyncing the VLAN */
interface->vid = vid + (set ? VLAN_N_VID : 0);
/* Update the unicast and multicast address list to add/drop VLAN */
__dev_uc_unsync(netdev, fm10k_uc_vlan_unsync);
__dev_mc_unsync(netdev, fm10k_mc_vlan_unsync);
fm10k_mbx_unlock(interface);
return 0;
}
static int fm10k_vlan_rx_add_vid(struct net_device *netdev,
__always_unused __be16 proto, u16 vid)
{
/* update VLAN and address table based on changes */
return fm10k_update_vid(netdev, vid, true);
}
static int fm10k_vlan_rx_kill_vid(struct net_device *netdev,
__always_unused __be16 proto, u16 vid)
{
/* update VLAN and address table based on changes */
return fm10k_update_vid(netdev, vid, false);
}
static u16 fm10k_find_next_vlan(struct fm10k_intfc *interface, u16 vid)
{
struct fm10k_hw *hw = &interface->hw;
u16 default_vid = hw->mac.default_vid;
u16 vid_limit = vid < default_vid ? default_vid : VLAN_N_VID;
vid = find_next_bit(interface->active_vlans, vid_limit, ++vid);
return vid;
}
static void fm10k_clear_unused_vlans(struct fm10k_intfc *interface)
{
struct fm10k_hw *hw = &interface->hw;
u32 vid, prev_vid;
/* loop through and find any gaps in the table */
for (vid = 0, prev_vid = 0;
prev_vid < VLAN_N_VID;
prev_vid = vid + 1, vid = fm10k_find_next_vlan(interface, vid)) {
if (prev_vid == vid)
continue;
/* send request to clear multiple bits at a time */
prev_vid += (vid - prev_vid - 1) << FM10K_VLAN_LENGTH_SHIFT;
hw->mac.ops.update_vlan(hw, prev_vid, 0, false);
}
}
static int __fm10k_uc_sync(struct net_device *dev,
const unsigned char *addr, bool sync)
{
struct fm10k_intfc *interface = netdev_priv(dev);
struct fm10k_hw *hw = &interface->hw;
u16 vid, glort = interface->glort;
s32 err;
if (!is_valid_ether_addr(addr))
return -EADDRNOTAVAIL;
/* update table with current entries */
for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0;
vid < VLAN_N_VID;
vid = fm10k_find_next_vlan(interface, vid)) {
err = hw->mac.ops.update_uc_addr(hw, glort, addr,
vid, sync, 0);
if (err)
return err;
}
return 0;
}
static int fm10k_uc_sync(struct net_device *dev,
const unsigned char *addr)
{
return __fm10k_uc_sync(dev, addr, true);
}
static int fm10k_uc_unsync(struct net_device *dev,
const unsigned char *addr)
{
return __fm10k_uc_sync(dev, addr, false);
}
static int fm10k_set_mac(struct net_device *dev, void *p)
{
struct fm10k_intfc *interface = netdev_priv(dev);
struct fm10k_hw *hw = &interface->hw;
struct sockaddr *addr = p;
s32 err = 0;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
if (dev->flags & IFF_UP) {
/* setting MAC address requires mailbox */
fm10k_mbx_lock(interface);
err = fm10k_uc_sync(dev, addr->sa_data);
if (!err)
fm10k_uc_unsync(dev, hw->mac.addr);
fm10k_mbx_unlock(interface);
}
if (!err) {
ether_addr_copy(dev->dev_addr, addr->sa_data);
ether_addr_copy(hw->mac.addr, addr->sa_data);
dev->addr_assign_type &= ~NET_ADDR_RANDOM;
}
/* if we had a mailbox error suggest trying again */
return err ? -EAGAIN : 0;
}
static int __fm10k_mc_sync(struct net_device *dev,
const unsigned char *addr, bool sync)
{
struct fm10k_intfc *interface = netdev_priv(dev);
struct fm10k_hw *hw = &interface->hw;
u16 vid, glort = interface->glort;
s32 err;
if (!is_multicast_ether_addr(addr))
return -EADDRNOTAVAIL;
/* update table with current entries */
for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0;
vid < VLAN_N_VID;
vid = fm10k_find_next_vlan(interface, vid)) {
err = hw->mac.ops.update_mc_addr(hw, glort, addr, vid, sync);
if (err)
return err;
}
return 0;
}
static int fm10k_mc_sync(struct net_device *dev,
const unsigned char *addr)
{
return __fm10k_mc_sync(dev, addr, true);
}
static int fm10k_mc_unsync(struct net_device *dev,
const unsigned char *addr)
{
return __fm10k_mc_sync(dev, addr, false);
}
static void fm10k_set_rx_mode(struct net_device *dev)
{
struct fm10k_intfc *interface = netdev_priv(dev);
struct fm10k_hw *hw = &interface->hw;
int xcast_mode;
/* no need to update the harwdare if we are not running */
if (!(dev->flags & IFF_UP))
return;
/* determine new mode based on flags */
xcast_mode = (dev->flags & IFF_PROMISC) ? FM10K_XCAST_MODE_PROMISC :
(dev->flags & IFF_ALLMULTI) ? FM10K_XCAST_MODE_ALLMULTI :
(dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ?
FM10K_XCAST_MODE_MULTI : FM10K_XCAST_MODE_NONE;
fm10k_mbx_lock(interface);
/* syncronize all of the addresses */
if (xcast_mode != FM10K_XCAST_MODE_PROMISC) {
__dev_uc_sync(dev, fm10k_uc_sync, fm10k_uc_unsync);
if (xcast_mode != FM10K_XCAST_MODE_ALLMULTI)
__dev_mc_sync(dev, fm10k_mc_sync, fm10k_mc_unsync);
}
/* if we aren't changing modes there is nothing to do */
if (interface->xcast_mode != xcast_mode) {
/* update VLAN table */
if (xcast_mode == FM10K_XCAST_MODE_PROMISC)
hw->mac.ops.update_vlan(hw, FM10K_VLAN_ALL, 0, true);
if (interface->xcast_mode == FM10K_XCAST_MODE_PROMISC)
fm10k_clear_unused_vlans(interface);
/* update xcast mode */
hw->mac.ops.update_xcast_mode(hw, interface->glort, xcast_mode);
/* record updated xcast mode state */
interface->xcast_mode = xcast_mode;
}
fm10k_mbx_unlock(interface);
}
void fm10k_restore_rx_state(struct fm10k_intfc *interface)
{
struct net_device *netdev = interface->netdev;
struct fm10k_hw *hw = &interface->hw;
int xcast_mode;
u16 vid, glort;
/* record glort for this interface */
glort = interface->glort;
/* convert interface flags to xcast mode */
if (netdev->flags & IFF_PROMISC)
xcast_mode = FM10K_XCAST_MODE_PROMISC;
else if (netdev->flags & IFF_ALLMULTI)
xcast_mode = FM10K_XCAST_MODE_ALLMULTI;
else if (netdev->flags & (IFF_BROADCAST | IFF_MULTICAST))
xcast_mode = FM10K_XCAST_MODE_MULTI;
else
xcast_mode = FM10K_XCAST_MODE_NONE;
fm10k_mbx_lock(interface);
/* Enable logical port */
hw->mac.ops.update_lport_state(hw, glort, interface->glort_count, true);
/* update VLAN table */
hw->mac.ops.update_vlan(hw, FM10K_VLAN_ALL, 0,
xcast_mode == FM10K_XCAST_MODE_PROMISC);
/* Add filter for VLAN 0 */
hw->mac.ops.update_vlan(hw, 0, 0, true);
/* update table with current entries */
for (vid = hw->mac.default_vid ? fm10k_find_next_vlan(interface, 0) : 0;
vid < VLAN_N_VID;
vid = fm10k_find_next_vlan(interface, vid)) {
hw->mac.ops.update_vlan(hw, vid, 0, true);
hw->mac.ops.update_uc_addr(hw, glort, hw->mac.addr,
vid, true, 0);
}
/* syncronize all of the addresses */
if (xcast_mode != FM10K_XCAST_MODE_PROMISC) {
__dev_uc_sync(netdev, fm10k_uc_sync, fm10k_uc_unsync);
if (xcast_mode != FM10K_XCAST_MODE_ALLMULTI)
__dev_mc_sync(netdev, fm10k_mc_sync, fm10k_mc_unsync);
}
/* update xcast mode */
hw->mac.ops.update_xcast_mode(hw, glort, xcast_mode);
fm10k_mbx_unlock(interface);
/* record updated xcast mode state */
interface->xcast_mode = xcast_mode;
}
void fm10k_reset_rx_state(struct fm10k_intfc *interface)
{
struct net_device *netdev = interface->netdev;
struct fm10k_hw *hw = &interface->hw;
fm10k_mbx_lock(interface);
/* clear the logical port state on lower device */
hw->mac.ops.update_lport_state(hw, interface->glort,
interface->glort_count, false);
fm10k_mbx_unlock(interface);
/* reset flags to default state */
interface->xcast_mode = FM10K_XCAST_MODE_NONE;
/* clear the sync flag since the lport has been dropped */
__dev_uc_unsync(netdev, NULL);
__dev_mc_unsync(netdev, NULL);
}
/**
* fm10k_get_stats64 - Get System Network Statistics
* @netdev: network interface device structure
* @stats: storage space for 64bit statistics
*
* Returns 64bit statistics, for use in the ndo_get_stats64 callback. This
* function replaces fm10k_get_stats for kernels which support it.
*/
static struct rtnl_link_stats64 *fm10k_get_stats64(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct fm10k_intfc *interface = netdev_priv(netdev);
struct fm10k_ring *ring;
unsigned int start, i;
u64 bytes, packets;
rcu_read_lock();
for (i = 0; i < interface->num_rx_queues; i++) {
ring = ACCESS_ONCE(interface->rx_ring[i]);
if (!ring)
continue;
do {
start = u64_stats_fetch_begin_irq(&ring->syncp);
packets = ring->stats.packets;
bytes = ring->stats.bytes;
} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
stats->rx_packets += packets;
stats->rx_bytes += bytes;
}
for (i = 0; i < interface->num_tx_queues; i++) {
ring = ACCESS_ONCE(interface->rx_ring[i]);
if (!ring)
continue;
do {
start = u64_stats_fetch_begin_irq(&ring->syncp);
packets = ring->stats.packets;
bytes = ring->stats.bytes;
} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
stats->tx_packets += packets;
stats->tx_bytes += bytes;
}
rcu_read_unlock();
/* following stats updated by fm10k_service_task() */
stats->rx_missed_errors = netdev->stats.rx_missed_errors;
return stats;
}
static const struct net_device_ops fm10k_netdev_ops = {
.ndo_open = fm10k_open,
.ndo_stop = fm10k_close,
.ndo_validate_addr = eth_validate_addr,
.ndo_start_xmit = fm10k_xmit_frame,
.ndo_set_mac_address = fm10k_set_mac,
.ndo_change_mtu = fm10k_change_mtu,
.ndo_vlan_rx_add_vid = fm10k_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = fm10k_vlan_rx_kill_vid,
.ndo_set_rx_mode = fm10k_set_rx_mode,
.ndo_get_stats64 = fm10k_get_stats64,
};
#define DEFAULT_DEBUG_LEVEL_SHIFT 3
struct net_device *fm10k_alloc_netdev(void)
{
struct fm10k_intfc *interface;
struct net_device *dev;
dev = alloc_etherdev_mq(sizeof(struct fm10k_intfc), MAX_QUEUES);
if (!dev)
return NULL;
/* set net device and ethtool ops */
dev->netdev_ops = &fm10k_netdev_ops;
/* configure default debug level */
interface = netdev_priv(dev);
interface->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
/* configure default features */
dev->features |= NETIF_F_SG;
/* all features defined to this point should be changeable */
dev->hw_features |= dev->features;
/* configure VLAN features */
dev->vlan_features |= dev->features;
/* configure tunnel offloads */
dev->hw_enc_features = NETIF_F_SG;
/* we want to leave these both on as we cannot disable VLAN tag
* insertion or stripping on the hardware since it is contained
* in the FTAG and not in the frame itself.
*/
dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_FILTER;
dev->priv_flags |= IFF_UNICAST_FLT;
return dev;
}
