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linux/drivers/net/vmxnet3/vmxnet3_ethtool.c
Ronak Doshi 3dd7400b41 vmxnet3: turn off lro when rxcsum is disabled 
Currently, when rx csum is disabled, vmxnet3 driver does not turn
off lro, which can cause performance issues if user does not turn off
lro explicitly. This patch adds fix_features support which is used to
turn off LRO whenever RXCSUM is disabled.

Signed-off-by: Ronak Doshi <doshir@vmware.com>
Acked-by: Rishi Mehta <rmehta@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-06-04 20:05:56 -07:00

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/*
* Linux driver for VMware's vmxnet3 ethernet NIC.
*
* Copyright (C) 2008-2016, VMware, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; version 2 of the License and no later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Maintained by: pv-drivers@vmware.com
*
*/
#include "vmxnet3_int.h"
struct vmxnet3_stat_desc {
char desc[ETH_GSTRING_LEN];
int offset;
};
/* per tq stats maintained by the device */
static const struct vmxnet3_stat_desc
vmxnet3_tq_dev_stats[] = {
/* description, offset */
{ "Tx Queue#", 0 },
{ " TSO pkts tx", offsetof(struct UPT1_TxStats, TSOPktsTxOK) },
{ " TSO bytes tx", offsetof(struct UPT1_TxStats, TSOBytesTxOK) },
{ " ucast pkts tx", offsetof(struct UPT1_TxStats, ucastPktsTxOK) },
{ " ucast bytes tx", offsetof(struct UPT1_TxStats, ucastBytesTxOK) },
{ " mcast pkts tx", offsetof(struct UPT1_TxStats, mcastPktsTxOK) },
{ " mcast bytes tx", offsetof(struct UPT1_TxStats, mcastBytesTxOK) },
{ " bcast pkts tx", offsetof(struct UPT1_TxStats, bcastPktsTxOK) },
{ " bcast bytes tx", offsetof(struct UPT1_TxStats, bcastBytesTxOK) },
{ " pkts tx err", offsetof(struct UPT1_TxStats, pktsTxError) },
{ " pkts tx discard", offsetof(struct UPT1_TxStats, pktsTxDiscard) },
};
/* per tq stats maintained by the driver */
static const struct vmxnet3_stat_desc
vmxnet3_tq_driver_stats[] = {
/* description, offset */
{" drv dropped tx total", offsetof(struct vmxnet3_tq_driver_stats,
drop_total) },
{ " too many frags", offsetof(struct vmxnet3_tq_driver_stats,
drop_too_many_frags) },
{ " giant hdr", offsetof(struct vmxnet3_tq_driver_stats,
drop_oversized_hdr) },
{ " hdr err", offsetof(struct vmxnet3_tq_driver_stats,
drop_hdr_inspect_err) },
{ " tso", offsetof(struct vmxnet3_tq_driver_stats,
drop_tso) },
{ " ring full", offsetof(struct vmxnet3_tq_driver_stats,
tx_ring_full) },
{ " pkts linearized", offsetof(struct vmxnet3_tq_driver_stats,
linearized) },
{ " hdr cloned", offsetof(struct vmxnet3_tq_driver_stats,
copy_skb_header) },
{ " giant hdr", offsetof(struct vmxnet3_tq_driver_stats,
oversized_hdr) },
};
/* per rq stats maintained by the device */
static const struct vmxnet3_stat_desc
vmxnet3_rq_dev_stats[] = {
{ "Rx Queue#", 0 },
{ " LRO pkts rx", offsetof(struct UPT1_RxStats, LROPktsRxOK) },
{ " LRO byte rx", offsetof(struct UPT1_RxStats, LROBytesRxOK) },
{ " ucast pkts rx", offsetof(struct UPT1_RxStats, ucastPktsRxOK) },
{ " ucast bytes rx", offsetof(struct UPT1_RxStats, ucastBytesRxOK) },
{ " mcast pkts rx", offsetof(struct UPT1_RxStats, mcastPktsRxOK) },
{ " mcast bytes rx", offsetof(struct UPT1_RxStats, mcastBytesRxOK) },
{ " bcast pkts rx", offsetof(struct UPT1_RxStats, bcastPktsRxOK) },
{ " bcast bytes rx", offsetof(struct UPT1_RxStats, bcastBytesRxOK) },
{ " pkts rx OOB", offsetof(struct UPT1_RxStats, pktsRxOutOfBuf) },
{ " pkts rx err", offsetof(struct UPT1_RxStats, pktsRxError) },
};
/* per rq stats maintained by the driver */
static const struct vmxnet3_stat_desc
vmxnet3_rq_driver_stats[] = {
/* description, offset */
{ " drv dropped rx total", offsetof(struct vmxnet3_rq_driver_stats,
drop_total) },
{ " err", offsetof(struct vmxnet3_rq_driver_stats,
drop_err) },
{ " fcs", offsetof(struct vmxnet3_rq_driver_stats,
drop_fcs) },
{ " rx buf alloc fail", offsetof(struct vmxnet3_rq_driver_stats,
rx_buf_alloc_failure) },
};
/* global stats maintained by the driver */
static const struct vmxnet3_stat_desc
vmxnet3_global_stats[] = {
/* description, offset */
{ "tx timeout count", offsetof(struct vmxnet3_adapter,
tx_timeout_count) }
};
void
vmxnet3_get_stats64(struct net_device *netdev,
struct rtnl_link_stats64 *stats)
{
struct vmxnet3_adapter *adapter;
struct vmxnet3_tq_driver_stats *drvTxStats;
struct vmxnet3_rq_driver_stats *drvRxStats;
struct UPT1_TxStats *devTxStats;
struct UPT1_RxStats *devRxStats;
unsigned long flags;
int i;
adapter = netdev_priv(netdev);
/* Collect the dev stats into the shared area */
spin_lock_irqsave(&adapter->cmd_lock, flags);
VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
spin_unlock_irqrestore(&adapter->cmd_lock, flags);
for (i = 0; i < adapter->num_tx_queues; i++) {
devTxStats = &adapter->tqd_start[i].stats;
drvTxStats = &adapter->tx_queue[i].stats;
stats->tx_packets += devTxStats->ucastPktsTxOK +
devTxStats->mcastPktsTxOK +
devTxStats->bcastPktsTxOK;
stats->tx_bytes += devTxStats->ucastBytesTxOK +
devTxStats->mcastBytesTxOK +
devTxStats->bcastBytesTxOK;
stats->tx_errors += devTxStats->pktsTxError;
stats->tx_dropped += drvTxStats->drop_total;
}
for (i = 0; i < adapter->num_rx_queues; i++) {
devRxStats = &adapter->rqd_start[i].stats;
drvRxStats = &adapter->rx_queue[i].stats;
stats->rx_packets += devRxStats->ucastPktsRxOK +
devRxStats->mcastPktsRxOK +
devRxStats->bcastPktsRxOK;
stats->rx_bytes += devRxStats->ucastBytesRxOK +
devRxStats->mcastBytesRxOK +
devRxStats->bcastBytesRxOK;
stats->rx_errors += devRxStats->pktsRxError;
stats->rx_dropped += drvRxStats->drop_total;
stats->multicast += devRxStats->mcastPktsRxOK;
}
}
static int
vmxnet3_get_sset_count(struct net_device *netdev, int sset)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
switch (sset) {
case ETH_SS_STATS:
return (ARRAY_SIZE(vmxnet3_tq_dev_stats) +
ARRAY_SIZE(vmxnet3_tq_driver_stats)) *
adapter->num_tx_queues +
(ARRAY_SIZE(vmxnet3_rq_dev_stats) +
ARRAY_SIZE(vmxnet3_rq_driver_stats)) *
adapter->num_rx_queues +
ARRAY_SIZE(vmxnet3_global_stats);
default:
return -EOPNOTSUPP;
}
}
/* This is a version 2 of the vmxnet3 ethtool_regs which goes hand in hand with
* the version 2 of the vmxnet3 support for ethtool(8) --register-dump.
* Therefore, if any registers are added, removed or modified, then a version
* bump and a corresponding change in the vmxnet3 support for ethtool(8)
* --register-dump would be required.
*/
static int
vmxnet3_get_regs_len(struct net_device *netdev)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
return ((9 /* BAR1 registers */ +
(1 + adapter->intr.num_intrs) +
(1 + adapter->num_tx_queues * 17 /* Tx queue registers */) +
(1 + adapter->num_rx_queues * 23 /* Rx queue registers */)) *
sizeof(u32));
}
static void
vmxnet3_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
strlcpy(drvinfo->driver, vmxnet3_driver_name, sizeof(drvinfo->driver));
strlcpy(drvinfo->version, VMXNET3_DRIVER_VERSION_REPORT,
sizeof(drvinfo->version));
strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
sizeof(drvinfo->bus_info));
}
static void
vmxnet3_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
if (stringset == ETH_SS_STATS) {
int i, j;
for (j = 0; j < adapter->num_tx_queues; j++) {
for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++) {
memcpy(buf, vmxnet3_tq_dev_stats[i].desc,
ETH_GSTRING_LEN);
buf += ETH_GSTRING_LEN;
}
for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats);
i++) {
memcpy(buf, vmxnet3_tq_driver_stats[i].desc,
ETH_GSTRING_LEN);
buf += ETH_GSTRING_LEN;
}
}
for (j = 0; j < adapter->num_rx_queues; j++) {
for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++) {
memcpy(buf, vmxnet3_rq_dev_stats[i].desc,
ETH_GSTRING_LEN);
buf += ETH_GSTRING_LEN;
}
for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats);
i++) {
memcpy(buf, vmxnet3_rq_driver_stats[i].desc,
ETH_GSTRING_LEN);
buf += ETH_GSTRING_LEN;
}
}
for (i = 0; i < ARRAY_SIZE(vmxnet3_global_stats); i++) {
memcpy(buf, vmxnet3_global_stats[i].desc,
ETH_GSTRING_LEN);
buf += ETH_GSTRING_LEN;
}
}
}
netdev_features_t vmxnet3_fix_features(struct net_device *netdev,
netdev_features_t features)
{
/* If Rx checksum is disabled, then LRO should also be disabled */
if (!(features & NETIF_F_RXCSUM))
features &= ~NETIF_F_LRO;
return features;
}
int vmxnet3_set_features(struct net_device *netdev, netdev_features_t features)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
unsigned long flags;
netdev_features_t changed = features ^ netdev->features;
if (changed & (NETIF_F_RXCSUM | NETIF_F_LRO |
NETIF_F_HW_VLAN_CTAG_RX)) {
if (features & NETIF_F_RXCSUM)
adapter->shared->devRead.misc.uptFeatures |=
UPT1_F_RXCSUM;
else
adapter->shared->devRead.misc.uptFeatures &=
~UPT1_F_RXCSUM;
/* update hardware LRO capability accordingly */
if (features & NETIF_F_LRO)
adapter->shared->devRead.misc.uptFeatures |=
UPT1_F_LRO;
else
adapter->shared->devRead.misc.uptFeatures &=
~UPT1_F_LRO;
if (features & NETIF_F_HW_VLAN_CTAG_RX)
adapter->shared->devRead.misc.uptFeatures |=
UPT1_F_RXVLAN;
else
adapter->shared->devRead.misc.uptFeatures &=
~UPT1_F_RXVLAN;
spin_lock_irqsave(&adapter->cmd_lock, flags);
VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
VMXNET3_CMD_UPDATE_FEATURE);
spin_unlock_irqrestore(&adapter->cmd_lock, flags);
}
return 0;
}
static void
vmxnet3_get_ethtool_stats(struct net_device *netdev,
struct ethtool_stats *stats, u64 *buf)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
unsigned long flags;
u8 *base;
int i;
int j = 0;
spin_lock_irqsave(&adapter->cmd_lock, flags);
VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_STATS);
spin_unlock_irqrestore(&adapter->cmd_lock, flags);
/* this does assume each counter is 64-bit wide */
for (j = 0; j < adapter->num_tx_queues; j++) {
base = (u8 *)&adapter->tqd_start[j].stats;
*buf++ = (u64)j;
for (i = 1; i < ARRAY_SIZE(vmxnet3_tq_dev_stats); i++)
*buf++ = *(u64 *)(base +
vmxnet3_tq_dev_stats[i].offset);
base = (u8 *)&adapter->tx_queue[j].stats;
for (i = 0; i < ARRAY_SIZE(vmxnet3_tq_driver_stats); i++)
*buf++ = *(u64 *)(base +
vmxnet3_tq_driver_stats[i].offset);
}
for (j = 0; j < adapter->num_rx_queues; j++) {
base = (u8 *)&adapter->rqd_start[j].stats;
*buf++ = (u64) j;
for (i = 1; i < ARRAY_SIZE(vmxnet3_rq_dev_stats); i++)
*buf++ = *(u64 *)(base +
vmxnet3_rq_dev_stats[i].offset);
base = (u8 *)&adapter->rx_queue[j].stats;
for (i = 0; i < ARRAY_SIZE(vmxnet3_rq_driver_stats); i++)
*buf++ = *(u64 *)(base +
vmxnet3_rq_driver_stats[i].offset);
}
base = (u8 *)adapter;
for (i = 0; i < ARRAY_SIZE(vmxnet3_global_stats); i++)
*buf++ = *(u64 *)(base + vmxnet3_global_stats[i].offset);
}
/* This is a version 2 of the vmxnet3 ethtool_regs which goes hand in hand with
* the version 2 of the vmxnet3 support for ethtool(8) --register-dump.
* Therefore, if any registers are added, removed or modified, then a version
* bump and a corresponding change in the vmxnet3 support for ethtool(8)
* --register-dump would be required.
*/
static void
vmxnet3_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
u32 *buf = p;
int i = 0, j = 0;
memset(p, 0, vmxnet3_get_regs_len(netdev));
regs->version = 2;
/* Update vmxnet3_get_regs_len if we want to dump more registers */
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_DSAL);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_DSAH);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
buf[j++] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ECR);
buf[j++] = adapter->intr.num_intrs;
for (i = 0; i < adapter->intr.num_intrs; i++) {
buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_IMR
+ i * VMXNET3_REG_ALIGN);
}
buf[j++] = adapter->num_tx_queues;
for (i = 0; i < adapter->num_tx_queues; i++) {
struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i];
buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_TXPROD +
i * VMXNET3_REG_ALIGN);
buf[j++] = VMXNET3_GET_ADDR_LO(tq->tx_ring.basePA);
buf[j++] = VMXNET3_GET_ADDR_HI(tq->tx_ring.basePA);
buf[j++] = tq->tx_ring.size;
buf[j++] = tq->tx_ring.next2fill;
buf[j++] = tq->tx_ring.next2comp;
buf[j++] = tq->tx_ring.gen;
buf[j++] = VMXNET3_GET_ADDR_LO(tq->data_ring.basePA);
buf[j++] = VMXNET3_GET_ADDR_HI(tq->data_ring.basePA);
buf[j++] = tq->data_ring.size;
buf[j++] = tq->txdata_desc_size;
buf[j++] = VMXNET3_GET_ADDR_LO(tq->comp_ring.basePA);
buf[j++] = VMXNET3_GET_ADDR_HI(tq->comp_ring.basePA);
buf[j++] = tq->comp_ring.size;
buf[j++] = tq->comp_ring.next2proc;
buf[j++] = tq->comp_ring.gen;
buf[j++] = tq->stopped;
}
buf[j++] = adapter->num_rx_queues;
for (i = 0; i < adapter->num_rx_queues; i++) {
struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_RXPROD +
i * VMXNET3_REG_ALIGN);
buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_RXPROD2 +
i * VMXNET3_REG_ALIGN);
buf[j++] = VMXNET3_GET_ADDR_LO(rq->rx_ring[0].basePA);
buf[j++] = VMXNET3_GET_ADDR_HI(rq->rx_ring[0].basePA);
buf[j++] = rq->rx_ring[0].size;
buf[j++] = rq->rx_ring[0].next2fill;
buf[j++] = rq->rx_ring[0].next2comp;
buf[j++] = rq->rx_ring[0].gen;
buf[j++] = VMXNET3_GET_ADDR_LO(rq->rx_ring[1].basePA);
buf[j++] = VMXNET3_GET_ADDR_HI(rq->rx_ring[1].basePA);
buf[j++] = rq->rx_ring[1].size;
buf[j++] = rq->rx_ring[1].next2fill;
buf[j++] = rq->rx_ring[1].next2comp;
buf[j++] = rq->rx_ring[1].gen;
buf[j++] = VMXNET3_GET_ADDR_LO(rq->data_ring.basePA);
buf[j++] = VMXNET3_GET_ADDR_HI(rq->data_ring.basePA);
buf[j++] = rq->rx_ring[0].size;
buf[j++] = rq->data_ring.desc_size;
buf[j++] = VMXNET3_GET_ADDR_LO(rq->comp_ring.basePA);
buf[j++] = VMXNET3_GET_ADDR_HI(rq->comp_ring.basePA);
buf[j++] = rq->comp_ring.size;
buf[j++] = rq->comp_ring.next2proc;
buf[j++] = rq->comp_ring.gen;
}
}
static void
vmxnet3_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
wol->supported = WAKE_UCAST | WAKE_ARP | WAKE_MAGIC;
wol->wolopts = adapter->wol;
}
static int
vmxnet3_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
if (wol->wolopts & (WAKE_PHY | WAKE_MCAST | WAKE_BCAST |
WAKE_MAGICSECURE)) {
return -EOPNOTSUPP;
}
adapter->wol = wol->wolopts;
device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
return 0;
}
static int
vmxnet3_get_link_ksettings(struct net_device *netdev,
struct ethtool_link_ksettings *ecmd)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
ethtool_link_ksettings_zero_link_mode(ecmd, supported);
ethtool_link_ksettings_add_link_mode(ecmd, supported, 10000baseT_Full);
ethtool_link_ksettings_add_link_mode(ecmd, supported, 1000baseT_Full);
ethtool_link_ksettings_add_link_mode(ecmd, supported, TP);
ethtool_link_ksettings_zero_link_mode(ecmd, advertising);
ethtool_link_ksettings_add_link_mode(ecmd, advertising, TP);
ecmd->base.port = PORT_TP;
if (adapter->link_speed) {
ecmd->base.speed = adapter->link_speed;
ecmd->base.duplex = DUPLEX_FULL;
} else {
ecmd->base.speed = SPEED_UNKNOWN;
ecmd->base.duplex = DUPLEX_UNKNOWN;
}
return 0;
}
static void
vmxnet3_get_ringparam(struct net_device *netdev,
struct ethtool_ringparam *param)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
param->rx_max_pending = VMXNET3_RX_RING_MAX_SIZE;
param->tx_max_pending = VMXNET3_TX_RING_MAX_SIZE;
param->rx_mini_max_pending = VMXNET3_VERSION_GE_3(adapter) ?
VMXNET3_RXDATA_DESC_MAX_SIZE : 0;
param->rx_jumbo_max_pending = VMXNET3_RX_RING2_MAX_SIZE;
param->rx_pending = adapter->rx_ring_size;
param->tx_pending = adapter->tx_ring_size;
param->rx_mini_pending = VMXNET3_VERSION_GE_3(adapter) ?
adapter->rxdata_desc_size : 0;
param->rx_jumbo_pending = adapter->rx_ring2_size;
}
static int
vmxnet3_set_ringparam(struct net_device *netdev,
struct ethtool_ringparam *param)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
u32 new_tx_ring_size, new_rx_ring_size, new_rx_ring2_size;
u16 new_rxdata_desc_size;
u32 sz;
int err = 0;
if (param->tx_pending == 0 || param->tx_pending >
VMXNET3_TX_RING_MAX_SIZE)
return -EINVAL;
if (param->rx_pending == 0 || param->rx_pending >
VMXNET3_RX_RING_MAX_SIZE)
return -EINVAL;
if (param->rx_jumbo_pending == 0 ||
param->rx_jumbo_pending > VMXNET3_RX_RING2_MAX_SIZE)
return -EINVAL;
/* if adapter not yet initialized, do nothing */
if (adapter->rx_buf_per_pkt == 0) {
netdev_err(netdev, "adapter not completely initialized, "
"ring size cannot be changed yet\n");
return -EOPNOTSUPP;
}
if (VMXNET3_VERSION_GE_3(adapter)) {
if (param->rx_mini_pending < 0 ||
param->rx_mini_pending > VMXNET3_RXDATA_DESC_MAX_SIZE) {
return -EINVAL;
}
} else if (param->rx_mini_pending != 0) {
return -EINVAL;
}
/* round it up to a multiple of VMXNET3_RING_SIZE_ALIGN */
new_tx_ring_size = (param->tx_pending + VMXNET3_RING_SIZE_MASK) &
~VMXNET3_RING_SIZE_MASK;
new_tx_ring_size = min_t(u32, new_tx_ring_size,
VMXNET3_TX_RING_MAX_SIZE);
if (new_tx_ring_size > VMXNET3_TX_RING_MAX_SIZE || (new_tx_ring_size %
VMXNET3_RING_SIZE_ALIGN) != 0)
return -EINVAL;
/* ring0 has to be a multiple of
* rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
*/
sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
new_rx_ring_size = (param->rx_pending + sz - 1) / sz * sz;
new_rx_ring_size = min_t(u32, new_rx_ring_size,
VMXNET3_RX_RING_MAX_SIZE / sz * sz);
if (new_rx_ring_size > VMXNET3_RX_RING_MAX_SIZE || (new_rx_ring_size %
sz) != 0)
return -EINVAL;
/* ring2 has to be a multiple of VMXNET3_RING_SIZE_ALIGN */
new_rx_ring2_size = (param->rx_jumbo_pending + VMXNET3_RING_SIZE_MASK) &
~VMXNET3_RING_SIZE_MASK;
new_rx_ring2_size = min_t(u32, new_rx_ring2_size,
VMXNET3_RX_RING2_MAX_SIZE);
/* rx data ring buffer size has to be a multiple of
* VMXNET3_RXDATA_DESC_SIZE_ALIGN
*/
new_rxdata_desc_size =
(param->rx_mini_pending + VMXNET3_RXDATA_DESC_SIZE_MASK) &
~VMXNET3_RXDATA_DESC_SIZE_MASK;
new_rxdata_desc_size = min_t(u16, new_rxdata_desc_size,
VMXNET3_RXDATA_DESC_MAX_SIZE);
if (new_tx_ring_size == adapter->tx_ring_size &&
new_rx_ring_size == adapter->rx_ring_size &&
new_rx_ring2_size == adapter->rx_ring2_size &&
new_rxdata_desc_size == adapter->rxdata_desc_size) {
return 0;
}
/*
* Reset_work may be in the middle of resetting the device, wait for its
* completion.
*/
while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
usleep_range(1000, 2000);
if (netif_running(netdev)) {
vmxnet3_quiesce_dev(adapter);
vmxnet3_reset_dev(adapter);
/* recreate the rx queue and the tx queue based on the
* new sizes */
vmxnet3_tq_destroy_all(adapter);
vmxnet3_rq_destroy_all(adapter);
err = vmxnet3_create_queues(adapter, new_tx_ring_size,
new_rx_ring_size, new_rx_ring2_size,
adapter->txdata_desc_size,
new_rxdata_desc_size);
if (err) {
/* failed, most likely because of OOM, try default
* size */
netdev_err(netdev, "failed to apply new sizes, "
"try the default ones\n");
new_rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
new_rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
new_tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
new_rxdata_desc_size = VMXNET3_VERSION_GE_3(adapter) ?
VMXNET3_DEF_RXDATA_DESC_SIZE : 0;
err = vmxnet3_create_queues(adapter,
new_tx_ring_size,
new_rx_ring_size,
new_rx_ring2_size,
adapter->txdata_desc_size,
new_rxdata_desc_size);
if (err) {
netdev_err(netdev, "failed to create queues "
"with default sizes. Closing it\n");
goto out;
}
}
err = vmxnet3_activate_dev(adapter);
if (err)
netdev_err(netdev, "failed to re-activate, error %d."
" Closing it\n", err);
}
adapter->tx_ring_size = new_tx_ring_size;
adapter->rx_ring_size = new_rx_ring_size;
adapter->rx_ring2_size = new_rx_ring2_size;
adapter->rxdata_desc_size = new_rxdata_desc_size;
out:
clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
if (err)
vmxnet3_force_close(adapter);
return err;
}
static int
vmxnet3_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *info,
u32 *rules)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
switch (info->cmd) {
case ETHTOOL_GRXRINGS:
info->data = adapter->num_rx_queues;
return 0;
}
return -EOPNOTSUPP;
}
#ifdef VMXNET3_RSS
static u32
vmxnet3_get_rss_indir_size(struct net_device *netdev)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
struct UPT1_RSSConf *rssConf = adapter->rss_conf;
return rssConf->indTableSize;
}
static int
vmxnet3_get_rss(struct net_device *netdev, u32 *p, u8 *key, u8 *hfunc)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
struct UPT1_RSSConf *rssConf = adapter->rss_conf;
unsigned int n = rssConf->indTableSize;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP;
if (!p)
return 0;
while (n--)
p[n] = rssConf->indTable[n];
return 0;
}
static int
vmxnet3_set_rss(struct net_device *netdev, const u32 *p, const u8 *key,
const u8 hfunc)
{
unsigned int i;
unsigned long flags;
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
struct UPT1_RSSConf *rssConf = adapter->rss_conf;
/* We do not allow change in unsupported parameters */
if (key ||
(hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
return -EOPNOTSUPP;
if (!p)
return 0;
for (i = 0; i < rssConf->indTableSize; i++)
rssConf->indTable[i] = p[i];
spin_lock_irqsave(&adapter->cmd_lock, flags);
VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
VMXNET3_CMD_UPDATE_RSSIDT);
spin_unlock_irqrestore(&adapter->cmd_lock, flags);
return 0;
}
#endif
static int
vmxnet3_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ec)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
if (!VMXNET3_VERSION_GE_3(adapter))
return -EOPNOTSUPP;
switch (adapter->coal_conf->coalMode) {
case VMXNET3_COALESCE_DISABLED:
/* struct ethtool_coalesce is already initialized to 0 */
break;
case VMXNET3_COALESCE_ADAPT:
ec->use_adaptive_rx_coalesce = true;
break;
case VMXNET3_COALESCE_STATIC:
ec->tx_max_coalesced_frames =
adapter->coal_conf->coalPara.coalStatic.tx_comp_depth;
ec->rx_max_coalesced_frames =
adapter->coal_conf->coalPara.coalStatic.rx_depth;
break;
case VMXNET3_COALESCE_RBC: {
u32 rbc_rate;
rbc_rate = adapter->coal_conf->coalPara.coalRbc.rbc_rate;
ec->rx_coalesce_usecs = VMXNET3_COAL_RBC_USECS(rbc_rate);
}
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static int
vmxnet3_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ec)
{
struct vmxnet3_adapter *adapter = netdev_priv(netdev);
struct Vmxnet3_DriverShared *shared = adapter->shared;
union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
unsigned long flags;
if (!VMXNET3_VERSION_GE_3(adapter))
return -EOPNOTSUPP;
if (ec->rx_coalesce_usecs_irq ||
ec->rx_max_coalesced_frames_irq ||
ec->tx_coalesce_usecs ||
ec->tx_coalesce_usecs_irq ||
ec->tx_max_coalesced_frames_irq ||
ec->stats_block_coalesce_usecs ||
ec->use_adaptive_tx_coalesce ||
ec->pkt_rate_low ||
ec->rx_coalesce_usecs_low ||
ec->rx_max_coalesced_frames_low ||
ec->tx_coalesce_usecs_low ||
ec->tx_max_coalesced_frames_low ||
ec->pkt_rate_high ||
ec->rx_coalesce_usecs_high ||
ec->rx_max_coalesced_frames_high ||
ec->tx_coalesce_usecs_high ||
ec->tx_max_coalesced_frames_high ||
ec->rate_sample_interval) {
return -EINVAL;
}
if ((ec->rx_coalesce_usecs == 0) &&
(ec->use_adaptive_rx_coalesce == 0) &&
(ec->tx_max_coalesced_frames == 0) &&
(ec->rx_max_coalesced_frames == 0)) {
memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
adapter->coal_conf->coalMode = VMXNET3_COALESCE_DISABLED;
goto done;
}
if (ec->rx_coalesce_usecs != 0) {
u32 rbc_rate;
if ((ec->use_adaptive_rx_coalesce != 0) ||
(ec->tx_max_coalesced_frames != 0) ||
(ec->rx_max_coalesced_frames != 0)) {
return -EINVAL;
}
rbc_rate = VMXNET3_COAL_RBC_RATE(ec->rx_coalesce_usecs);
if (rbc_rate < VMXNET3_COAL_RBC_MIN_RATE ||
rbc_rate > VMXNET3_COAL_RBC_MAX_RATE) {
return -EINVAL;
}
memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
adapter->coal_conf->coalMode = VMXNET3_COALESCE_RBC;
adapter->coal_conf->coalPara.coalRbc.rbc_rate = rbc_rate;
goto done;
}
if (ec->use_adaptive_rx_coalesce != 0) {
if ((ec->rx_coalesce_usecs != 0) ||
(ec->tx_max_coalesced_frames != 0) ||
(ec->rx_max_coalesced_frames != 0)) {
return -EINVAL;
}
memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
adapter->coal_conf->coalMode = VMXNET3_COALESCE_ADAPT;
goto done;
}
if ((ec->tx_max_coalesced_frames != 0) ||
(ec->rx_max_coalesced_frames != 0)) {
if ((ec->rx_coalesce_usecs != 0) ||
(ec->use_adaptive_rx_coalesce != 0)) {
return -EINVAL;
}
if ((ec->tx_max_coalesced_frames >
VMXNET3_COAL_STATIC_MAX_DEPTH) ||
(ec->rx_max_coalesced_frames >
VMXNET3_COAL_STATIC_MAX_DEPTH)) {
return -EINVAL;
}
memset(adapter->coal_conf, 0, sizeof(*adapter->coal_conf));
adapter->coal_conf->coalMode = VMXNET3_COALESCE_STATIC;
adapter->coal_conf->coalPara.coalStatic.tx_comp_depth =
(ec->tx_max_coalesced_frames ?
ec->tx_max_coalesced_frames :
VMXNET3_COAL_STATIC_DEFAULT_DEPTH);
adapter->coal_conf->coalPara.coalStatic.rx_depth =
(ec->rx_max_coalesced_frames ?
ec->rx_max_coalesced_frames :
VMXNET3_COAL_STATIC_DEFAULT_DEPTH);
adapter->coal_conf->coalPara.coalStatic.tx_depth =
VMXNET3_COAL_STATIC_DEFAULT_DEPTH;
goto done;
}
done:
adapter->default_coal_mode = false;
if (netif_running(netdev)) {
spin_lock_irqsave(&adapter->cmd_lock, flags);
cmdInfo->varConf.confVer = 1;
cmdInfo->varConf.confLen =
cpu_to_le32(sizeof(*adapter->coal_conf));
cmdInfo->varConf.confPA = cpu_to_le64(adapter->coal_conf_pa);
VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
VMXNET3_CMD_SET_COALESCE);
spin_unlock_irqrestore(&adapter->cmd_lock, flags);
}
return 0;
}
static const struct ethtool_ops vmxnet3_ethtool_ops = {
.get_drvinfo = vmxnet3_get_drvinfo,
.get_regs_len = vmxnet3_get_regs_len,
.get_regs = vmxnet3_get_regs,
.get_wol = vmxnet3_get_wol,
.set_wol = vmxnet3_set_wol,
.get_link = ethtool_op_get_link,
.get_coalesce = vmxnet3_get_coalesce,
.set_coalesce = vmxnet3_set_coalesce,
.get_strings = vmxnet3_get_strings,
.get_sset_count = vmxnet3_get_sset_count,
.get_ethtool_stats = vmxnet3_get_ethtool_stats,
.get_ringparam = vmxnet3_get_ringparam,
.set_ringparam = vmxnet3_set_ringparam,
.get_rxnfc = vmxnet3_get_rxnfc,
#ifdef VMXNET3_RSS
.get_rxfh_indir_size = vmxnet3_get_rss_indir_size,
.get_rxfh = vmxnet3_get_rss,
.set_rxfh = vmxnet3_set_rss,
#endif
.get_link_ksettings = vmxnet3_get_link_ksettings,
};
void vmxnet3_set_ethtool_ops(struct net_device *netdev)
{
netdev->ethtool_ops = &vmxnet3_ethtool_ops;
}
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