Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1337 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/siena/efx.c b/drivers/net/ethernet/sfc/siena/efx.c
new file mode 100644
index 000000000..60e5b7c8c
--- /dev/null
+++ b/drivers/net/ethernet/sfc/siena/efx.c
@@ -0,0 +1,1337 @@
+// 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/aer.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);
+
+	if (cmd == SIOCSHWTSTAMP)
+		return efx_siena_ptp_set_ts_config(efx, ifr);
+	if (cmd == SIOCGHWTSTAMP)
+		return efx_siena_ptp_get_ts_config(efx, 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 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,
+#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);
+
+	pci_disable_pcie_error_reporting(pci_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;
+
+	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);
+
+	(void)pci_enable_pcie_error_reporting(pci_dev);
+
+	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 <mbrown@fensystems.co.uk>");
+MODULE_DESCRIPTION("Solarflare Siena network driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, efx_pci_table);