// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2005-2006 Fen Systems Ltd.
* Copyright 2005-2013 Solarflare Communications Inc.
*/
#include <linux/filter.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/in.h>
#include <linux/ethtool.h>
#include <linux/topology.h>
#include <linux/gfp.h>
#include <linux/interrupt.h>
#include "net_driver.h"
#include <net/gre.h>
#include <net/udp_tunnel.h>
#include "efx.h"
#include "efx_common.h"
#include "efx_channels.h"
#include "rx_common.h"
#include "tx_common.h"
#include "nic.h"
#include "io.h"
#include "selftest.h"
#include "sriov.h"
#ifdef CONFIG_SFC_SIENA_SRIOV
#include "siena_sriov.h"
#endif
#include "mcdi_port_common.h"
#include "mcdi_pcol.h"
#include "workarounds.h"
/**************************************************************************
*
* Configurable values
*
*************************************************************************/
module_param_named(interrupt_mode, efx_siena_interrupt_mode, uint, 0444);
MODULE_PARM_DESC(interrupt_mode,
"Interrupt mode (0=>MSIX 1=>MSI 2=>legacy)");
module_param_named(rss_cpus, efx_siena_rss_cpus, uint, 0444);
MODULE_PARM_DESC(rss_cpus, "Number of CPUs to use for Receive-Side Scaling");
/*
* Use separate channels for TX and RX events
*
* Set this to 1 to use separate channels for TX and RX. It allows us
* to control interrupt affinity separately for TX and RX.
*
* This is only used in MSI-X interrupt mode
*/
bool efx_siena_separate_tx_channels;
module_param_named(efx_separate_tx_channels, efx_siena_separate_tx_channels,
bool, 0444);
MODULE_PARM_DESC(efx_separate_tx_channels,
"Use separate channels for TX and RX");
/* Initial interrupt moderation settings. They can be modified after
* module load with ethtool.
*
* The default for RX should strike a balance between increasing the
* round-trip latency and reducing overhead.
*/
static unsigned int rx_irq_mod_usec = 60;
/* Initial interrupt moderation settings. They can be modified after
* module load with ethtool.
*
* This default is chosen to ensure that a 10G link does not go idle
* while a TX queue is stopped after it has become full. A queue is
* restarted when it drops below half full. The time this takes (assuming
* worst case 3 descriptors per packet and 1024 descriptors) is
* 512 / 3 * 1.2 = 205 usec.
*/
static unsigned int tx_irq_mod_usec = 150;
static bool phy_flash_cfg;
module_param(phy_flash_cfg, bool, 0644);
MODULE_PARM_DESC(phy_flash_cfg, "Set PHYs into reflash mode initially");
static unsigned debug = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
NETIF_MSG_LINK | NETIF_MSG_IFDOWN |
NETIF_MSG_IFUP | NETIF_MSG_RX_ERR |
NETIF_MSG_TX_ERR | NETIF_MSG_HW);
module_param(debug, uint, 0);
MODULE_PARM_DESC(debug, "Bitmapped debugging message enable value");
/**************************************************************************
*
* Utility functions and prototypes
*
*************************************************************************/
static void efx_remove_port(struct efx_nic *efx);
static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog);
static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp);
static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
u32 flags);
#define EFX_ASSERT_RESET_SERIALISED(efx) \
do { \
if ((efx->state == STATE_READY) || \
(efx->state == STATE_RECOVERY) || \
(efx->state == STATE_DISABLED)) \
ASSERT_RTNL(); \
} while (0)
/**************************************************************************
*
* Port handling
*
**************************************************************************/
static void efx_fini_port(struct efx_nic *efx);
static int efx_probe_port(struct efx_nic *efx)
{
int rc;
netif_dbg(efx, probe, efx->net_dev, "create port\n");
if (phy_flash_cfg)
efx->phy_mode = PHY_MODE_SPECIAL;
/* Connect up MAC/PHY operations table */
rc = efx->type->probe_port(efx);
if (rc)
return rc;
/* Initialise MAC address to permanent address */
eth_hw_addr_set(efx->net_dev, efx->net_dev->perm_addr);
return 0;
}
static int efx_init_port(struct efx_nic *efx)
{
int rc;
netif_dbg(efx, drv, efx->net_dev, "init port\n");
mutex_lock(&efx->mac_lock);
efx->port_initialized = true;
/* Ensure the PHY advertises the correct flow control settings */
rc = efx_siena_mcdi_port_reconfigure(efx);
if (rc && rc != -EPERM)
goto fail;
mutex_unlock(&efx->mac_lock);
return 0;
fail:
mutex_unlock(&efx->mac_lock);
return rc;
}
static void efx_fini_port(struct efx_nic *efx)
{
netif_dbg(efx, drv, efx->net_dev, "shut down port\n");
if (!efx->port_initialized)
return;
efx->port_initialized = false;
efx->link_state.up = false;
efx_siena_link_status_changed(efx);
}
static void efx_remove_port(struct efx_nic *efx)
{
netif_dbg(efx, drv, efx->net_dev, "destroying port\n");
efx->type->remove_port(efx);
}
/**************************************************************************
*
* NIC handling
*
**************************************************************************/
static LIST_HEAD(efx_primary_list);
static LIST_HEAD(efx_unassociated_list);
static bool efx_same_controller(struct efx_nic *left, struct efx_nic *right)
{
return left->type == right->type &&
left->vpd_sn && right->vpd_sn &&
!strcmp(left->vpd_sn, right->vpd_sn);
}
static void efx_associate(struct efx_nic *efx)
{
struct efx_nic *other, *next;
if (efx->primary == efx) {
/* Adding primary function; look for secondaries */
netif_dbg(efx, probe, efx->net_dev, "adding to primary list\n");
list_add_tail(&efx->node, &efx_primary_list);
list_for_each_entry_safe(other, next, &efx_unassociated_list,
node) {
if (efx_same_controller(efx, other)) {
list_del(&other->node);
netif_dbg(other, probe, other->net_dev,
"moving to secondary list of %s %s\n",
pci_name(efx->pci_dev),
efx->net_dev->name);
list_add_tail(&other->node,
&efx->secondary_list);
other->primary = efx;
}
}
} else {
/* Adding secondary function; look for primary */
list_for_each_entry(other, &efx_primary_list, node) {
if (efx_same_controller(efx, other)) {
netif_dbg(efx, probe, efx->net_dev,
"adding to secondary list of %s %s\n",
pci_name(other->pci_dev),
other->net_dev->name);
list_add_tail(&efx->node,
&other->secondary_list);
efx->primary = other;
return;
}
}
netif_dbg(efx, probe, efx->net_dev,
"adding to unassociated list\n");
list_add_tail(&efx->node, &efx_unassociated_list);
}
}
static void efx_dissociate(struct efx_nic *efx)
{
struct efx_nic *other, *next;
list_del(&efx->node);
efx->primary = NULL;
list_for_each_entry_safe(other, next, &efx->secondary_list, node) {
list_del(&other->node);
netif_dbg(other, probe, other->net_dev,
"moving to unassociated list\n");
list_add_tail(&other->node, &efx_unassociated_list);
other->primary = NULL;
}
}
static int efx_probe_nic(struct efx_nic *efx)
{
int rc;
netif_dbg(efx, probe, efx->net_dev, "creating NIC\n");
/* Carry out hardware-type specific initialisation */
rc = efx->type->probe(efx);
if (rc)
return rc;
do {
if (!efx->max_channels || !efx->max_tx_channels) {
netif_err(efx, drv, efx->net_dev,
"Insufficient resources to allocate"
" any channels\n");
rc = -ENOSPC;
goto fail1;
}
/* Determine the number of channels and queues by trying
* to hook in MSI-X interrupts.
*/
rc = efx_siena_probe_interrupts(efx);
if (rc)
goto fail1;
rc = efx_siena_set_channels(efx);
if (rc)
goto fail1;
/* dimension_resources can fail with EAGAIN */
rc = efx->type->dimension_resources(efx);
if (rc != 0 && rc != -EAGAIN)
goto fail2;
if (rc == -EAGAIN)
/* try again with new max_channels */
efx_siena_remove_interrupts(efx);
} while (rc == -EAGAIN);
if (efx->n_channels > 1)
netdev_rss_key_fill(efx->rss_context.rx_hash_key,
sizeof(efx->rss_context.rx_hash_key));
efx_siena_set_default_rx_indir_table(efx, &efx->rss_context);
/* Initialise the interrupt moderation settings */
efx->irq_mod_step_us = DIV_ROUND_UP(efx->timer_quantum_ns, 1000);
efx_siena_init_irq_moderation(efx, tx_irq_mod_usec, rx_irq_mod_usec,
true, true);
return 0;
fail2:
efx_siena_remove_interrupts(efx);
fail1:
efx->type->remove(efx);
return rc;
}
static void efx_remove_nic(struct efx_nic *efx)
{
netif_dbg(efx, drv, efx->net_dev, "destroying NIC\n");
efx_siena_remove_interrupts(efx);
efx->type->remove(efx);
}
/**************************************************************************
*
* NIC startup/shutdown
*
*************************************************************************/
static int efx_probe_all(struct efx_nic *efx)
{
int rc;
rc = efx_probe_nic(efx);
if (rc) {
netif_err(efx, probe, efx->net_dev, "failed to create NIC\n");
goto fail1;
}
rc = efx_probe_port(efx);
if (rc) {
netif_err(efx, probe, efx->net_dev, "failed to create port\n");
goto fail2;
}
BUILD_BUG_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_RXQ_MIN_ENT);
if (WARN_ON(EFX_DEFAULT_DMAQ_SIZE < EFX_TXQ_MIN_ENT(efx))) {
rc = -EINVAL;
goto fail3;
}
#ifdef CONFIG_SFC_SIENA_SRIOV
rc = efx->type->vswitching_probe(efx);
if (rc) /* not fatal; the PF will still work fine */
netif_warn(efx, probe, efx->net_dev,
"failed to setup vswitching rc=%d;"
" VFs may not function\n", rc);
#endif
rc = efx_siena_probe_filters(efx);
if (rc) {
netif_err(efx, probe, efx->net_dev,
"failed to create filter tables\n");
goto fail4;
}
rc = efx_siena_probe_channels(efx);
if (rc)
goto fail5;
return 0;
fail5:
efx_siena_remove_filters(efx);
fail4:
#ifdef CONFIG_SFC_SIENA_SRIOV
efx->type->vswitching_remove(efx);
#endif
fail3:
efx_remove_port(efx);
fail2:
efx_remove_nic(efx);
fail1:
return rc;
}
static void efx_remove_all(struct efx_nic *efx)
{
rtnl_lock();
efx_xdp_setup_prog(efx, NULL);
rtnl_unlock();
efx_siena_remove_channels(efx);
efx_siena_remove_filters(efx);
#ifdef CONFIG_SFC_SIENA_SRIOV
efx->type->vswitching_remove(efx);
#endif
efx_remove_port(efx);
efx_remove_nic(efx);
}
/**************************************************************************
*
* Interrupt moderation
*
**************************************************************************/
unsigned int efx_siena_usecs_to_ticks(struct efx_nic *efx, unsigned int usecs)
{
if (usecs == 0)
return 0;
if (usecs * 1000 < efx->timer_quantum_ns)
return 1; /* never round down to 0 */
return usecs * 1000 / efx->timer_quantum_ns;
}
/* Set interrupt moderation parameters */
int efx_siena_init_irq_moderation(struct efx_nic *efx, unsigned int tx_usecs,
unsigned int rx_usecs, bool rx_adaptive,
bool rx_may_override_tx)
{
struct efx_channel *channel;
unsigned int timer_max_us;
EFX_ASSERT_RESET_SERIALISED(efx);
timer_max_us = efx->timer_max_ns / 1000;
if (tx_usecs > timer_max_us || rx_usecs > timer_max_us)
return -EINVAL;
if (tx_usecs != rx_usecs && efx->tx_channel_offset == 0 &&
!rx_may_override_tx) {
netif_err(efx, drv, efx->net_dev, "Channels are shared. "
"RX and TX IRQ moderation must be equal\n");
return -EINVAL;
}
efx->irq_rx_adaptive = rx_adaptive;
efx->irq_rx_moderation_us = rx_usecs;
efx_for_each_channel(channel, efx) {
if (efx_channel_has_rx_queue(channel))
channel->irq_moderation_us = rx_usecs;
else if (efx_channel_has_tx_queues(channel))
channel->irq_moderation_us = tx_usecs;
else if (efx_channel_is_xdp_tx(channel))
channel->irq_moderation_us = tx_usecs;
}
return 0;
}
void efx_siena_get_irq_moderation(struct efx_nic *efx, unsigned int *tx_usecs,
unsigned int *rx_usecs, bool *rx_adaptive)
{
*rx_adaptive = efx->irq_rx_adaptive;
*rx_usecs = efx->irq_rx_moderation_us;
/* If channels are shared between RX and TX, so is IRQ
* moderation. Otherwise, IRQ moderation is the same for all
* TX channels and is not adaptive.
*/
if (efx->tx_channel_offset == 0) {
*tx_usecs = *rx_usecs;
} else {
struct efx_channel *tx_channel;
tx_channel = efx->channel[efx->tx_channel_offset];
*tx_usecs = tx_channel->irq_moderation_us;
}
}
/**************************************************************************
*
* ioctls
*
*************************************************************************/
/* Net device ioctl
* Context: process, rtnl_lock() held.
*/
static int efx_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
{
struct efx_nic *efx = netdev_priv(net_dev);
struct mii_ioctl_data *data = if_mii(ifr);
/* Convert phy_id from older PRTAD/DEVAD format */
if ((cmd == SIOCGMIIREG || cmd == SIOCSMIIREG) &&
(data->phy_id & 0xfc00) == 0x0400)
data->phy_id ^= MDIO_PHY_ID_C45 | 0x0400;
return mdio_mii_ioctl(&efx->mdio, data, cmd);
}
/**************************************************************************
*
* Kernel net device interface
*
*************************************************************************/
/* Context: process, rtnl_lock() held. */
static int efx_net_open(struct net_device *net_dev)
{
struct efx_nic *efx = netdev_priv(net_dev);
int rc;
netif_dbg(efx, ifup, efx->net_dev, "opening device on CPU %d\n",
raw_smp_processor_id());
rc = efx_check_disabled(efx);
if (rc)
return rc;
if (efx->phy_mode & PHY_MODE_SPECIAL)
return -EBUSY;
if (efx_siena_mcdi_poll_reboot(efx) && efx_siena_reset(efx, RESET_TYPE_ALL))
return -EIO;
/* Notify the kernel of the link state polled during driver load,
* before the monitor starts running */
efx_siena_link_status_changed(efx);
efx_siena_start_all(efx);
if (efx->state == STATE_DISABLED || efx->reset_pending)
netif_device_detach(efx->net_dev);
efx_siena_selftest_async_start(efx);
return 0;
}
/* Context: process, rtnl_lock() held.
* Note that the kernel will ignore our return code; this method
* should really be a void.
*/
static int efx_net_stop(struct net_device *net_dev)
{
struct efx_nic *efx = netdev_priv(net_dev);
netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
raw_smp_processor_id());
/* Stop the device and flush all the channels */
efx_siena_stop_all(efx);
return 0;
}
static int efx_vlan_rx_add_vid(struct net_device *net_dev, __be16 proto, u16 vid)
{
struct efx_nic *efx = netdev_priv(net_dev);
if (efx->type->vlan_rx_add_vid)
return efx->type->vlan_rx_add_vid(efx, proto, vid);
else
return -EOPNOTSUPP;
}
static int efx_vlan_rx_kill_vid(struct net_device *net_dev, __be16 proto, u16 vid)
{
struct efx_nic *efx = netdev_priv(net_dev);
if (efx->type->vlan_rx_kill_vid)
return efx->type->vlan_rx_kill_vid(efx, proto, vid);
else
return -EOPNOTSUPP;
}
static int efx_siena_hwtstamp_set(struct net_device *net_dev,
struct kernel_hwtstamp_config *config,
struct netlink_ext_ack *extack)
{
struct efx_nic *efx = netdev_priv(net_dev);
return efx_siena_ptp_set_ts_config(efx, config, extack);
}
static int efx_siena_hwtstamp_get(struct net_device *net_dev,
struct kernel_hwtstamp_config *config)
{
struct efx_nic *efx = netdev_priv(net_dev);
return efx_siena_ptp_get_ts_config(efx, config);
}
static const struct net_device_ops efx_netdev_ops = {
.ndo_open = efx_net_open,
.ndo_stop = efx_net_stop,
.ndo_get_stats64 = efx_siena_net_stats,
.ndo_tx_timeout = efx_siena_watchdog,
.ndo_start_xmit = efx_siena_hard_start_xmit,
.ndo_validate_addr = eth_validate_addr,
.ndo_eth_ioctl = efx_ioctl,
.ndo_change_mtu = efx_siena_change_mtu,
.ndo_set_mac_address = efx_siena_set_mac_address,
.ndo_set_rx_mode = efx_siena_set_rx_mode,
.ndo_set_features = efx_siena_set_features,
.ndo_features_check = efx_siena_features_check,
.ndo_vlan_rx_add_vid = efx_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = efx_vlan_rx_kill_vid,
.ndo_hwtstamp_set = efx_siena_hwtstamp_set,
.ndo_hwtstamp_get = efx_siena_hwtstamp_get,
#ifdef CONFIG_SFC_SIENA_SRIOV
.ndo_set_vf_mac = efx_sriov_set_vf_mac,
.ndo_set_vf_vlan = efx_sriov_set_vf_vlan,
.ndo_set_vf_spoofchk = efx_sriov_set_vf_spoofchk,
.ndo_get_vf_config = efx_sriov_get_vf_config,
.ndo_set_vf_link_state = efx_sriov_set_vf_link_state,
#endif
.ndo_get_phys_port_id = efx_siena_get_phys_port_id,
.ndo_get_phys_port_name = efx_siena_get_phys_port_name,
.ndo_setup_tc = efx_siena_setup_tc,
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = efx_siena_filter_rfs,
#endif
.ndo_xdp_xmit = efx_xdp_xmit,
.ndo_bpf = efx_xdp
};
static int efx_xdp_setup_prog(struct efx_nic *efx, struct bpf_prog *prog)
{
struct bpf_prog *old_prog;
if (efx->xdp_rxq_info_failed) {
netif_err(efx, drv, efx->net_dev,
"Unable to bind XDP program due to previous failure of rxq_info\n");
return -EINVAL;
}
if (prog && efx->net_dev->mtu > efx_siena_xdp_max_mtu(efx)) {
netif_err(efx, drv, efx->net_dev,
"Unable to configure XDP with MTU of %d (max: %d)\n",
efx->net_dev->mtu, efx_siena_xdp_max_mtu(efx));
return -EINVAL;
}
old_prog = rtnl_dereference(efx->xdp_prog);
rcu_assign_pointer(efx->xdp_prog, prog);
/* Release the reference that was originally passed by the caller. */
if (old_prog)
bpf_prog_put(old_prog);
return 0;
}
/* Context: process, rtnl_lock() held. */
static int efx_xdp(struct net_device *dev, struct netdev_bpf *xdp)
{
struct efx_nic *efx = netdev_priv(dev);
switch (xdp->command) {
case XDP_SETUP_PROG:
return efx_xdp_setup_prog(efx, xdp->prog);
default:
return -EINVAL;
}
}
static int efx_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **xdpfs,
u32 flags)
{
struct efx_nic *efx = netdev_priv(dev);
if (!netif_running(dev))
return -EINVAL;
return efx_siena_xdp_tx_buffers(efx, n, xdpfs, flags & XDP_XMIT_FLUSH);
}
static void efx_update_name(struct efx_nic *efx)
{
strcpy(efx->name, efx->net_dev->name);
efx_siena_mtd_rename(efx);
efx_siena_set_channel_names(efx);
}
static int efx_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
if ((net_dev->netdev_ops == &efx_netdev_ops) &&
event == NETDEV_CHANGENAME)
efx_update_name(netdev_priv(net_dev));
return NOTIFY_DONE;
}
static struct notifier_block efx_netdev_notifier = {
.notifier_call = efx_netdev_event,
};
static ssize_t phy_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct efx_nic *efx = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", efx->phy_type);
}
static DEVICE_ATTR_RO(phy_type);
static int efx_register_netdev(struct efx_nic *efx)
{
struct net_device *net_dev = efx->net_dev;
struct efx_channel *channel;
int rc;
net_dev->watchdog_timeo = 5 * HZ;
net_dev->irq = efx->pci_dev->irq;
net_dev->netdev_ops = &efx_netdev_ops;
if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0)
net_dev->priv_flags |= IFF_UNICAST_FLT;
net_dev->ethtool_ops = &efx_siena_ethtool_ops;
netif_set_tso_max_segs(net_dev, EFX_TSO_MAX_SEGS);
net_dev->min_mtu = EFX_MIN_MTU;
net_dev->max_mtu = EFX_MAX_MTU;
rtnl_lock();
/* Enable resets to be scheduled and check whether any were
* already requested. If so, the NIC is probably hosed so we
* abort.
*/
efx->state = STATE_READY;
smp_mb(); /* ensure we change state before checking reset_pending */
if (efx->reset_pending) {
pci_err(efx->pci_dev, "aborting probe due to scheduled reset\n");
rc = -EIO;
goto fail_locked;
}
rc = dev_alloc_name(net_dev, net_dev->name);
if (rc < 0)
goto fail_locked;
efx_update_name(efx);
/* Always start with carrier off; PHY events will detect the link */
netif_carrier_off(net_dev);
rc = register_netdevice(net_dev);
if (rc)
goto fail_locked;
efx_for_each_channel(channel, efx) {
struct efx_tx_queue *tx_queue;
efx_for_each_channel_tx_queue(tx_queue, channel)
efx_siena_init_tx_queue_core_txq(tx_queue);
}
efx_associate(efx);
rtnl_unlock();
rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_type);
if (rc) {
netif_err(efx, drv, efx->net_dev,
"failed to init net dev attributes\n");
goto fail_registered;
}
efx_siena_init_mcdi_logging(efx);
return 0;
fail_registered:
rtnl_lock();
efx_dissociate(efx);
unregister_netdevice(net_dev);
fail_locked:
efx->state = STATE_UNINIT;
rtnl_unlock();
netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
return rc;
}
static void efx_unregister_netdev(struct efx_nic *efx)
{
if (!efx->net_dev)
return;
BUG_ON(netdev_priv(efx->net_dev) != efx);
if (efx_dev_registered(efx)) {
strscpy(efx->name, pci_name(efx->pci_dev), sizeof(efx->name));
efx_siena_fini_mcdi_logging(efx);
device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_type);
unregister_netdev(efx->net_dev);
}
}
/**************************************************************************
*
* List of NICs we support
*
**************************************************************************/
/* PCI device ID table */
static const struct pci_device_id efx_pci_table[] = {
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0803), /* SFC9020 */
.driver_data = (unsigned long)&siena_a0_nic_type},
{PCI_DEVICE(PCI_VENDOR_ID_SOLARFLARE, 0x0813), /* SFL9021 */
.driver_data = (unsigned long)&siena_a0_nic_type},
{0} /* end of list */
};
/**************************************************************************
*
* Data housekeeping
*
**************************************************************************/
void efx_siena_update_sw_stats(struct efx_nic *efx, u64 *stats)
{
u64 n_rx_nodesc_trunc = 0;
struct efx_channel *channel;
efx_for_each_channel(channel, efx)
n_rx_nodesc_trunc += channel->n_rx_nodesc_trunc;
stats[GENERIC_STAT_rx_nodesc_trunc] = n_rx_nodesc_trunc;
stats[GENERIC_STAT_rx_noskb_drops] = atomic_read(&efx->n_rx_noskb_drops);
}
/**************************************************************************
*
* PCI interface
*
**************************************************************************/
/* Main body of final NIC shutdown code
* This is called only at module unload (or hotplug removal).
*/
static void efx_pci_remove_main(struct efx_nic *efx)
{
/* Flush reset_work. It can no longer be scheduled since we
* are not READY.
*/
BUG_ON(efx->state == STATE_READY);
efx_siena_flush_reset_workqueue(efx);
efx_siena_disable_interrupts(efx);
efx_siena_clear_interrupt_affinity(efx);
efx_siena_fini_interrupt(efx);
efx_fini_port(efx);
efx->type->fini(efx);
efx_siena_fini_napi(efx);
efx_remove_all(efx);
}
/* Final NIC shutdown
* This is called only at module unload (or hotplug removal). A PF can call
* this on its VFs to ensure they are unbound first.
*/
static void efx_pci_remove(struct pci_dev *pci_dev)
{
struct efx_nic *efx;
efx = pci_get_drvdata(pci_dev);
if (!efx)
return;
/* Mark the NIC as fini, then stop the interface */
rtnl_lock();
efx_dissociate(efx);
dev_close(efx->net_dev);
efx_siena_disable_interrupts(efx);
efx->state = STATE_UNINIT;
rtnl_unlock();
if (efx->type->sriov_fini)
efx->type->sriov_fini(efx);
efx_unregister_netdev(efx);
efx_siena_mtd_remove(efx);
efx_pci_remove_main(efx);
efx_siena_fini_io(efx);
netif_dbg(efx, drv, efx->net_dev, "shutdown successful\n");
efx_siena_fini_struct(efx);
free_netdev(efx->net_dev);
};
/* NIC VPD information
* Called during probe to display the part number of the
* installed NIC.
*/
static void efx_probe_vpd_strings(struct efx_nic *efx)
{
struct pci_dev *dev = efx->pci_dev;
unsigned int vpd_size, kw_len;
u8 *vpd_data;
int start;
vpd_data = pci_vpd_alloc(dev, &vpd_size);
if (IS_ERR(vpd_data)) {
pci_warn(dev, "Unable to read VPD\n");
return;
}
start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
PCI_VPD_RO_KEYWORD_PARTNO, &kw_len);
if (start < 0)
pci_err(dev, "Part number not found or incomplete\n");
else
pci_info(dev, "Part Number : %.*s\n", kw_len, vpd_data + start);
start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len);
if (start < 0)
pci_err(dev, "Serial number not found or incomplete\n");
else
efx->vpd_sn = kmemdup_nul(vpd_data + start, kw_len, GFP_KERNEL);
kfree(vpd_data);
}
/* Main body of NIC initialisation
* This is called at module load (or hotplug insertion, theoretically).
*/
static int efx_pci_probe_main(struct efx_nic *efx)
{
int rc;
/* Do start-of-day initialisation */
rc = efx_probe_all(efx);
if (rc)
goto fail1;
efx_siena_init_napi(efx);
down_write(&efx->filter_sem);
rc = efx->type->init(efx);
up_write(&efx->filter_sem);
if (rc) {
pci_err(efx->pci_dev, "failed to initialise NIC\n");
goto fail3;
}
rc = efx_init_port(efx);
if (rc) {
netif_err(efx, probe, efx->net_dev,
"failed to initialise port\n");
goto fail4;
}
rc = efx_siena_init_interrupt(efx);
if (rc)
goto fail5;
efx_siena_set_interrupt_affinity(efx);
rc = efx_siena_enable_interrupts(efx);
if (rc)
goto fail6;
return 0;
fail6:
efx_siena_clear_interrupt_affinity(efx);
efx_siena_fini_interrupt(efx);
fail5:
efx_fini_port(efx);
fail4:
efx->type->fini(efx);
fail3:
efx_siena_fini_napi(efx);
efx_remove_all(efx);
fail1:
return rc;
}
static int efx_pci_probe_post_io(struct efx_nic *efx)
{
struct net_device *net_dev = efx->net_dev;
int rc = efx_pci_probe_main(efx);
if (rc)
return rc;
if (efx->type->sriov_init) {
rc = efx->type->sriov_init(efx);
if (rc)
pci_err(efx->pci_dev, "SR-IOV can't be enabled rc %d\n",
rc);
}
/* Determine netdevice features */
net_dev->features |= (efx->type->offload_features | NETIF_F_SG |
NETIF_F_TSO | NETIF_F_RXCSUM | NETIF_F_RXALL);
if (efx->type->offload_features & (NETIF_F_IPV6_CSUM | NETIF_F_HW_CSUM))
net_dev->features |= NETIF_F_TSO6;
/* Check whether device supports TSO */
if (!efx->type->tso_versions || !efx->type->tso_versions(efx))
net_dev->features &= ~NETIF_F_ALL_TSO;
/* Mask for features that also apply to VLAN devices */
net_dev->vlan_features |= (NETIF_F_HW_CSUM | NETIF_F_SG |
NETIF_F_HIGHDMA | NETIF_F_ALL_TSO |
NETIF_F_RXCSUM);
net_dev->hw_features |= net_dev->features & ~efx->fixed_features;
/* Disable receiving frames with bad FCS, by default. */
net_dev->features &= ~NETIF_F_RXALL;
/* Disable VLAN filtering by default. It may be enforced if
* the feature is fixed (i.e. VLAN filters are required to
* receive VLAN tagged packets due to vPort restrictions).
*/
net_dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
net_dev->features |= efx->fixed_features;
net_dev->xdp_features = NETDEV_XDP_ACT_BASIC |
NETDEV_XDP_ACT_REDIRECT |
NETDEV_XDP_ACT_NDO_XMIT;
rc = efx_register_netdev(efx);
if (!rc)
return 0;
efx_pci_remove_main(efx);
return rc;
}
/* NIC initialisation
*
* This is called at module load (or hotplug insertion,
* theoretically). It sets up PCI mappings, resets the NIC,
* sets up and registers the network devices with the kernel and hooks
* the interrupt service routine. It does not prepare the device for
* transmission; this is left to the first time one of the network
* interfaces is brought up (i.e. efx_net_open).
*/
static int efx_pci_probe(struct pci_dev *pci_dev,
const struct pci_device_id *entry)
{
struct net_device *net_dev;
struct efx_nic *efx;
int rc;
/* Allocate and initialise a struct net_device and struct efx_nic */
net_dev = alloc_etherdev_mqs(sizeof(*efx), EFX_MAX_CORE_TX_QUEUES,
EFX_MAX_RX_QUEUES);
if (!net_dev)
return -ENOMEM;
efx = netdev_priv(net_dev);
efx->type = (const struct efx_nic_type *) entry->driver_data;
efx->fixed_features |= NETIF_F_HIGHDMA;
pci_set_drvdata(pci_dev, efx);
SET_NETDEV_DEV(net_dev, &pci_dev->dev);
rc = efx_siena_init_struct(efx, pci_dev, net_dev);
if (rc)
goto fail1;
pci_info(pci_dev, "Solarflare NIC detected\n");
if (!efx->type->is_vf)
efx_probe_vpd_strings(efx);
/* Set up basic I/O (BAR mappings etc) */
rc = efx_siena_init_io(efx, efx->type->mem_bar(efx),
efx->type->max_dma_mask,
efx->type->mem_map_size(efx));
if (rc)
goto fail2;
rc = efx_pci_probe_post_io(efx);
if (rc) {
/* On failure, retry once immediately.
* If we aborted probe due to a scheduled reset, dismiss it.
*/
efx->reset_pending = 0;
rc = efx_pci_probe_post_io(efx);
if (rc) {
/* On another failure, retry once more
* after a 50-305ms delay.
*/
unsigned char r;
get_random_bytes(&r, 1);
msleep((unsigned int)r + 50);
efx->reset_pending = 0;
rc = efx_pci_probe_post_io(efx);
}
}
if (rc)
goto fail3;
netif_dbg(efx, probe, efx->net_dev, "initialisation successful\n");
/* Try to create MTDs, but allow this to fail */
rtnl_lock();
rc = efx_mtd_probe(efx);
rtnl_unlock();
if (rc && rc != -EPERM)
netif_warn(efx, probe, efx->net_dev,
"failed to create MTDs (%d)\n", rc);
if (efx->type->udp_tnl_push_ports)
efx->type->udp_tnl_push_ports(efx);
return 0;
fail3:
efx_siena_fini_io(efx);
fail2:
efx_siena_fini_struct(efx);
fail1:
WARN_ON(rc > 0);
netif_dbg(efx, drv, efx->net_dev, "initialisation failed. rc=%d\n", rc);
free_netdev(net_dev);
return rc;
}
/* efx_pci_sriov_configure returns the actual number of Virtual Functions
* enabled on success
*/
#ifdef CONFIG_SFC_SIENA_SRIOV
static int efx_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
{
int rc;
struct efx_nic *efx = pci_get_drvdata(dev);
if (efx->type->sriov_configure) {
rc = efx->type->sriov_configure(efx, num_vfs);
if (rc)
return rc;
else
return num_vfs;
} else
return -EOPNOTSUPP;
}
#endif
static int efx_pm_freeze(struct device *dev)
{
struct efx_nic *efx = dev_get_drvdata(dev);
rtnl_lock();
if (efx->state != STATE_DISABLED) {
efx->state = STATE_UNINIT;
efx_device_detach_sync(efx);
efx_siena_stop_all(efx);
efx_siena_disable_interrupts(efx);
}
rtnl_unlock();
return 0;
}
static void efx_pci_shutdown(struct pci_dev *pci_dev)
{
struct efx_nic *efx = pci_get_drvdata(pci_dev);
if (!efx)
return;
efx_pm_freeze(&pci_dev->dev);
pci_disable_device(pci_dev);
}
static int efx_pm_thaw(struct device *dev)
{
int rc;
struct efx_nic *efx = dev_get_drvdata(dev);
rtnl_lock();
if (efx->state != STATE_DISABLED) {
rc = efx_siena_enable_interrupts(efx);
if (rc)
goto fail;
mutex_lock(&efx->mac_lock);
efx_siena_mcdi_port_reconfigure(efx);
mutex_unlock(&efx->mac_lock);
efx_siena_start_all(efx);
efx_device_attach_if_not_resetting(efx);
efx->state = STATE_READY;
efx->type->resume_wol(efx);
}
rtnl_unlock();
/* Reschedule any quenched resets scheduled during efx_pm_freeze() */
efx_siena_queue_reset_work(efx);
return 0;
fail:
rtnl_unlock();
return rc;
}
static int efx_pm_poweroff(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct efx_nic *efx = pci_get_drvdata(pci_dev);
efx->type->fini(efx);
efx->reset_pending = 0;
pci_save_state(pci_dev);
return pci_set_power_state(pci_dev, PCI_D3hot);
}
/* Used for both resume and restore */
static int efx_pm_resume(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct efx_nic *efx = pci_get_drvdata(pci_dev);
int rc;
rc = pci_set_power_state(pci_dev, PCI_D0);
if (rc)
return rc;
pci_restore_state(pci_dev);
rc = pci_enable_device(pci_dev);
if (rc)
return rc;
pci_set_master(efx->pci_dev);
rc = efx->type->reset(efx, RESET_TYPE_ALL);
if (rc)
return rc;
down_write(&efx->filter_sem);
rc = efx->type->init(efx);
up_write(&efx->filter_sem);
if (rc)
return rc;
rc = efx_pm_thaw(dev);
return rc;
}
static int efx_pm_suspend(struct device *dev)
{
int rc;
efx_pm_freeze(dev);
rc = efx_pm_poweroff(dev);
if (rc)
efx_pm_resume(dev);
return rc;
}
static const struct dev_pm_ops efx_pm_ops = {
.suspend = efx_pm_suspend,
.resume = efx_pm_resume,
.freeze = efx_pm_freeze,
.thaw = efx_pm_thaw,
.poweroff = efx_pm_poweroff,
.restore = efx_pm_resume,
};
static struct pci_driver efx_pci_driver = {
.name = KBUILD_MODNAME,
.id_table = efx_pci_table,
.probe = efx_pci_probe,
.remove = efx_pci_remove,
.driver.pm = &efx_pm_ops,
.shutdown = efx_pci_shutdown,
.err_handler = &efx_siena_err_handlers,
#ifdef CONFIG_SFC_SIENA_SRIOV
.sriov_configure = efx_pci_sriov_configure,
#endif
};
/**************************************************************************
*
* Kernel module interface
*
*************************************************************************/
static int __init efx_init_module(void)
{
int rc;
pr_info("Solarflare Siena driver\n");
rc = register_netdevice_notifier(&efx_netdev_notifier);
if (rc)
goto err_notifier;
#ifdef CONFIG_SFC_SIENA_SRIOV
rc = efx_init_sriov();
if (rc)
goto err_sriov;
#endif
rc = efx_siena_create_reset_workqueue();
if (rc)
goto err_reset;
rc = pci_register_driver(&efx_pci_driver);
if (rc < 0)
goto err_pci;
return 0;
err_pci:
efx_siena_destroy_reset_workqueue();
err_reset:
#ifdef CONFIG_SFC_SIENA_SRIOV
efx_fini_sriov();
err_sriov:
#endif
unregister_netdevice_notifier(&efx_netdev_notifier);
err_notifier:
return rc;
}
static void __exit efx_exit_module(void)
{
pr_info("Solarflare Siena driver unloading\n");
pci_unregister_driver(&efx_pci_driver);
efx_siena_destroy_reset_workqueue();
#ifdef CONFIG_SFC_SIENA_SRIOV
efx_fini_sriov();
#endif
unregister_netdevice_notifier(&efx_netdev_notifier);
}
module_init(efx_init_module);
module_exit(efx_exit_module);
MODULE_AUTHOR("Solarflare Communications and "
"Michael Brown <[email protected]>");
MODULE_DESCRIPTION("Solarflare Siena network driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, efx_pci_table);
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