Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 6683 insertions, 0 deletions

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
new file mode 100644
index 0000000000..cdf5251e56
--- /dev/null
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -0,0 +1,6683 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**************************************************************************/
+/*                                                                        */
+/*  IBM System i and System p Virtual NIC Device Driver                   */
+/*  Copyright (C) 2014 IBM Corp.                                          */
+/*  Santiago Leon (santi_leon@yahoo.com)                                  */
+/*  Thomas Falcon (tlfalcon@linux.vnet.ibm.com)                           */
+/*  John Allen (jallen@linux.vnet.ibm.com)                                */
+/*                                                                        */
+/*                                                                        */
+/* This module contains the implementation of a virtual ethernet device   */
+/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN    */
+/* option of the RS/6000 Platform Architecture to interface with virtual  */
+/* ethernet NICs that are presented to the partition by the hypervisor.   */
+/*									   */
+/* Messages are passed between the VNIC driver and the VNIC server using  */
+/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to  */
+/* issue and receive commands that initiate communication with the server */
+/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but    */
+/* are used by the driver to notify the server that a packet is           */
+/* ready for transmission or that a buffer has been added to receive a    */
+/* packet. Subsequently, sCRQs are used by the server to notify the       */
+/* driver that a packet transmission has been completed or that a packet  */
+/* has been received and placed in a waiting buffer.                      */
+/*                                                                        */
+/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in    */
+/* which skbs are DMA mapped and immediately unmapped when the transmit   */
+/* or receive has been completed, the VNIC driver is required to use      */
+/* "long term mapping". This entails that large, continuous DMA mapped    */
+/* buffers are allocated on driver initialization and these buffers are   */
+/* then continuously reused to pass skbs to and from the VNIC server.     */
+/*                                                                        */
+/**************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/completion.h>
+#include <linux/ioport.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/ethtool.h>
+#include <linux/proc_fs.h>
+#include <linux/if_arp.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/kthread.h>
+#include <linux/seq_file.h>
+#include <linux/interrupt.h>
+#include <net/net_namespace.h>
+#include <asm/hvcall.h>
+#include <linux/atomic.h>
+#include <asm/vio.h>
+#include <asm/xive.h>
+#include <asm/iommu.h>
+#include <linux/uaccess.h>
+#include <asm/firmware.h>
+#include <linux/workqueue.h>
+#include <linux/if_vlan.h>
+#include <linux/utsname.h>
+#include <linux/cpu.h>
+
+#include "ibmvnic.h"
+
+static const char ibmvnic_driver_name[] = "ibmvnic";
+static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
+
+MODULE_AUTHOR("Santiago Leon");
+MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
+
+static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
+static void release_sub_crqs(struct ibmvnic_adapter *, bool);
+static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
+static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
+static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
+static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
+static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
+static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
+static int enable_scrq_irq(struct ibmvnic_adapter *,
+			   struct ibmvnic_sub_crq_queue *);
+static int disable_scrq_irq(struct ibmvnic_adapter *,
+			    struct ibmvnic_sub_crq_queue *);
+static int pending_scrq(struct ibmvnic_adapter *,
+			struct ibmvnic_sub_crq_queue *);
+static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
+					struct ibmvnic_sub_crq_queue *);
+static int ibmvnic_poll(struct napi_struct *napi, int data);
+static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter);
+static inline void reinit_init_done(struct ibmvnic_adapter *adapter);
+static void send_query_map(struct ibmvnic_adapter *adapter);
+static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8);
+static int send_request_unmap(struct ibmvnic_adapter *, u8);
+static int send_login(struct ibmvnic_adapter *adapter);
+static void send_query_cap(struct ibmvnic_adapter *adapter);
+static int init_sub_crqs(struct ibmvnic_adapter *);
+static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
+static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset);
+static void release_crq_queue(struct ibmvnic_adapter *);
+static int __ibmvnic_set_mac(struct net_device *, u8 *);
+static int init_crq_queue(struct ibmvnic_adapter *adapter);
+static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
+static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
+					 struct ibmvnic_sub_crq_queue *tx_scrq);
+static void free_long_term_buff(struct ibmvnic_adapter *adapter,
+				struct ibmvnic_long_term_buff *ltb);
+static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter);
+static void flush_reset_queue(struct ibmvnic_adapter *adapter);
+
+struct ibmvnic_stat {
+	char name[ETH_GSTRING_LEN];
+	int offset;
+};
+
+#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
+			     offsetof(struct ibmvnic_statistics, stat))
+#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off))))
+
+static const struct ibmvnic_stat ibmvnic_stats[] = {
+	{"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
+	{"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
+	{"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
+	{"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
+	{"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
+	{"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
+	{"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
+	{"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
+	{"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
+	{"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
+	{"align_errors", IBMVNIC_STAT_OFF(align_errors)},
+	{"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
+	{"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
+	{"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
+	{"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
+	{"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
+	{"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
+	{"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
+	{"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
+	{"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
+	{"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
+	{"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
+};
+
+static int send_crq_init_complete(struct ibmvnic_adapter *adapter)
+{
+	union ibmvnic_crq crq;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
+	crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE;
+
+	return ibmvnic_send_crq(adapter, &crq);
+}
+
+static int send_version_xchg(struct ibmvnic_adapter *adapter)
+{
+	union ibmvnic_crq crq;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.version_exchange.first = IBMVNIC_CRQ_CMD;
+	crq.version_exchange.cmd = VERSION_EXCHANGE;
+	crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
+
+	return ibmvnic_send_crq(adapter, &crq);
+}
+
+static void ibmvnic_clean_queue_affinity(struct ibmvnic_adapter *adapter,
+					 struct ibmvnic_sub_crq_queue *queue)
+{
+	if (!(queue && queue->irq))
+		return;
+
+	cpumask_clear(queue->affinity_mask);
+
+	if (irq_set_affinity_and_hint(queue->irq, NULL))
+		netdev_warn(adapter->netdev,
+			    "%s: Clear affinity failed, queue addr = %p, IRQ = %d\n",
+			    __func__, queue, queue->irq);
+}
+
+static void ibmvnic_clean_affinity(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_sub_crq_queue **rxqs;
+	struct ibmvnic_sub_crq_queue **txqs;
+	int num_rxqs, num_txqs;
+	int i;
+
+	rxqs = adapter->rx_scrq;
+	txqs = adapter->tx_scrq;
+	num_txqs = adapter->num_active_tx_scrqs;
+	num_rxqs = adapter->num_active_rx_scrqs;
+
+	netdev_dbg(adapter->netdev, "%s: Cleaning irq affinity hints", __func__);
+	if (txqs) {
+		for (i = 0; i < num_txqs; i++)
+			ibmvnic_clean_queue_affinity(adapter, txqs[i]);
+	}
+	if (rxqs) {
+		for (i = 0; i < num_rxqs; i++)
+			ibmvnic_clean_queue_affinity(adapter, rxqs[i]);
+	}
+}
+
+static int ibmvnic_set_queue_affinity(struct ibmvnic_sub_crq_queue *queue,
+				      unsigned int *cpu, int *stragglers,
+				      int stride)
+{
+	cpumask_var_t mask;
+	int i;
+	int rc = 0;
+
+	if (!(queue && queue->irq))
+		return rc;
+
+	/* cpumask_var_t is either a pointer or array, allocation works here */
+	if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
+		return -ENOMEM;
+
+	/* while we have extra cpu give one extra to this irq */
+	if (*stragglers) {
+		stride++;
+		(*stragglers)--;
+	}
+	/* atomic write is safer than writing bit by bit directly */
+	for (i = 0; i < stride; i++) {
+		cpumask_set_cpu(*cpu, mask);
+		*cpu = cpumask_next_wrap(*cpu, cpu_online_mask,
+					 nr_cpu_ids, false);
+	}
+	/* set queue affinity mask */
+	cpumask_copy(queue->affinity_mask, mask);
+	rc = irq_set_affinity_and_hint(queue->irq, queue->affinity_mask);
+	free_cpumask_var(mask);
+
+	return rc;
+}
+
+/* assumes cpu read lock is held */
+static void ibmvnic_set_affinity(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_sub_crq_queue **rxqs = adapter->rx_scrq;
+	struct ibmvnic_sub_crq_queue **txqs = adapter->tx_scrq;
+	struct ibmvnic_sub_crq_queue *queue;
+	int num_rxqs = adapter->num_active_rx_scrqs, i_rxqs = 0;
+	int num_txqs = adapter->num_active_tx_scrqs, i_txqs = 0;
+	int total_queues, stride, stragglers, i;
+	unsigned int num_cpu, cpu;
+	bool is_rx_queue;
+	int rc = 0;
+
+	netdev_dbg(adapter->netdev, "%s: Setting irq affinity hints", __func__);
+	if (!(adapter->rx_scrq && adapter->tx_scrq)) {
+		netdev_warn(adapter->netdev,
+			    "%s: Set affinity failed, queues not allocated\n",
+			    __func__);
+		return;
+	}
+
+	total_queues = num_rxqs + num_txqs;
+	num_cpu = num_online_cpus();
+	/* number of cpu's assigned per irq */
+	stride = max_t(int, num_cpu / total_queues, 1);
+	/* number of leftover cpu's */
+	stragglers = num_cpu >= total_queues ? num_cpu % total_queues : 0;
+	/* next available cpu to assign irq to */
+	cpu = cpumask_next(-1, cpu_online_mask);
+
+	for (i = 0; i < total_queues; i++) {
+		is_rx_queue = false;
+		/* balance core load by alternating rx and tx assignments
+		 * ex: TX0 -> RX0 -> TX1 -> RX1 etc.
+		 */
+		if ((i % 2 == 1 && i_rxqs < num_rxqs) || i_txqs == num_txqs) {
+			queue = rxqs[i_rxqs++];
+			is_rx_queue = true;
+		} else {
+			queue = txqs[i_txqs++];
+		}
+
+		rc = ibmvnic_set_queue_affinity(queue, &cpu, &stragglers,
+						stride);
+		if (rc)
+			goto out;
+
+		if (!queue || is_rx_queue)
+			continue;
+
+		rc = __netif_set_xps_queue(adapter->netdev,
+					   cpumask_bits(queue->affinity_mask),
+					   i_txqs - 1, XPS_CPUS);
+		if (rc)
+			netdev_warn(adapter->netdev, "%s: Set XPS on queue %d failed, rc = %d.\n",
+				    __func__, i_txqs - 1, rc);
+	}
+
+out:
+	if (rc) {
+		netdev_warn(adapter->netdev,
+			    "%s: Set affinity failed, queue addr = %p, IRQ = %d, rc = %d.\n",
+			    __func__, queue, queue->irq, rc);
+		ibmvnic_clean_affinity(adapter);
+	}
+}
+
+static int ibmvnic_cpu_online(unsigned int cpu, struct hlist_node *node)
+{
+	struct ibmvnic_adapter *adapter;
+
+	adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node);
+	ibmvnic_set_affinity(adapter);
+	return 0;
+}
+
+static int ibmvnic_cpu_dead(unsigned int cpu, struct hlist_node *node)
+{
+	struct ibmvnic_adapter *adapter;
+
+	adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node_dead);
+	ibmvnic_set_affinity(adapter);
+	return 0;
+}
+
+static int ibmvnic_cpu_down_prep(unsigned int cpu, struct hlist_node *node)
+{
+	struct ibmvnic_adapter *adapter;
+
+	adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node);
+	ibmvnic_clean_affinity(adapter);
+	return 0;
+}
+
+static enum cpuhp_state ibmvnic_online;
+
+static int ibmvnic_cpu_notif_add(struct ibmvnic_adapter *adapter)
+{
+	int ret;
+
+	ret = cpuhp_state_add_instance_nocalls(ibmvnic_online, &adapter->node);
+	if (ret)
+		return ret;
+	ret = cpuhp_state_add_instance_nocalls(CPUHP_IBMVNIC_DEAD,
+					       &adapter->node_dead);
+	if (!ret)
+		return ret;
+	cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node);
+	return ret;
+}
+
+static void ibmvnic_cpu_notif_remove(struct ibmvnic_adapter *adapter)
+{
+	cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node);
+	cpuhp_state_remove_instance_nocalls(CPUHP_IBMVNIC_DEAD,
+					    &adapter->node_dead);
+}
+
+static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
+			  unsigned long length, unsigned long *number,
+			  unsigned long *irq)
+{
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+	long rc;
+
+	rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
+	*number = retbuf[0];
+	*irq = retbuf[1];
+
+	return rc;
+}
+
+/**
+ * ibmvnic_wait_for_completion - Check device state and wait for completion
+ * @adapter: private device data
+ * @comp_done: completion structure to wait for
+ * @timeout: time to wait in milliseconds
+ *
+ * Wait for a completion signal or until the timeout limit is reached
+ * while checking that the device is still active.
+ */
+static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
+				       struct completion *comp_done,
+				       unsigned long timeout)
+{
+	struct net_device *netdev;
+	unsigned long div_timeout;
+	u8 retry;
+
+	netdev = adapter->netdev;
+	retry = 5;
+	div_timeout = msecs_to_jiffies(timeout / retry);
+	while (true) {
+		if (!adapter->crq.active) {
+			netdev_err(netdev, "Device down!\n");
+			return -ENODEV;
+		}
+		if (!retry--)
+			break;
+		if (wait_for_completion_timeout(comp_done, div_timeout))
+			return 0;
+	}
+	netdev_err(netdev, "Operation timed out.\n");
+	return -ETIMEDOUT;
+}
+
+/**
+ * reuse_ltb() - Check if a long term buffer can be reused
+ * @ltb:  The long term buffer to be checked
+ * @size: The size of the long term buffer.
+ *
+ * An LTB can be reused unless its size has changed.
+ *
+ * Return: Return true if the LTB can be reused, false otherwise.
+ */
+static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size)
+{
+	return (ltb->buff && ltb->size == size);
+}
+
+/**
+ * alloc_long_term_buff() - Allocate a long term buffer (LTB)
+ *
+ * @adapter: ibmvnic adapter associated to the LTB
+ * @ltb:     container object for the LTB
+ * @size:    size of the LTB
+ *
+ * Allocate an LTB of the specified size and notify VIOS.
+ *
+ * If the given @ltb already has the correct size, reuse it. Otherwise if
+ * its non-NULL, free it. Then allocate a new one of the correct size.
+ * Notify the VIOS either way since we may now be working with a new VIOS.
+ *
+ * Allocating larger chunks of memory during resets, specially LPM or under
+ * low memory situations can cause resets to fail/timeout and for LPAR to
+ * lose connectivity. So hold onto the LTB even if we fail to communicate
+ * with the VIOS and reuse it on next open. Free LTB when adapter is closed.
+ *
+ * Return: 0 if we were able to allocate the LTB and notify the VIOS and
+ *	   a negative value otherwise.
+ */
+static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
+				struct ibmvnic_long_term_buff *ltb, int size)
+{
+	struct device *dev = &adapter->vdev->dev;
+	u64 prev = 0;
+	int rc;
+
+	if (!reuse_ltb(ltb, size)) {
+		dev_dbg(dev,
+			"LTB size changed from 0x%llx to 0x%x, reallocating\n",
+			 ltb->size, size);
+		prev = ltb->size;
+		free_long_term_buff(adapter, ltb);
+	}
+
+	if (ltb->buff) {
+		dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n",
+			ltb->map_id, ltb->size);
+	} else {
+		ltb->buff = dma_alloc_coherent(dev, size, &ltb->addr,
+					       GFP_KERNEL);
+		if (!ltb->buff) {
+			dev_err(dev, "Couldn't alloc long term buffer\n");
+			return -ENOMEM;
+		}
+		ltb->size = size;
+
+		ltb->map_id = find_first_zero_bit(adapter->map_ids,
+						  MAX_MAP_ID);
+		bitmap_set(adapter->map_ids, ltb->map_id, 1);
+
+		dev_dbg(dev,
+			"Allocated new LTB [map %d, size 0x%llx was 0x%llx]\n",
+			 ltb->map_id, ltb->size, prev);
+	}
+
+	/* Ensure ltb is zeroed - specially when reusing it. */
+	memset(ltb->buff, 0, ltb->size);
+
+	mutex_lock(&adapter->fw_lock);
+	adapter->fw_done_rc = 0;
+	reinit_completion(&adapter->fw_done);
+
+	rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
+	if (rc) {
+		dev_err(dev, "send_request_map failed, rc = %d\n", rc);
+		goto out;
+	}
+
+	rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
+	if (rc) {
+		dev_err(dev, "LTB map request aborted or timed out, rc = %d\n",
+			rc);
+		goto out;
+	}
+
+	if (adapter->fw_done_rc) {
+		dev_err(dev, "Couldn't map LTB, rc = %d\n",
+			adapter->fw_done_rc);
+		rc = -EIO;
+		goto out;
+	}
+	rc = 0;
+out:
+	/* don't free LTB on communication error - see function header */
+	mutex_unlock(&adapter->fw_lock);
+	return rc;
+}
+
+static void free_long_term_buff(struct ibmvnic_adapter *adapter,
+				struct ibmvnic_long_term_buff *ltb)
+{
+	struct device *dev = &adapter->vdev->dev;
+
+	if (!ltb->buff)
+		return;
+
+	/* VIOS automatically unmaps the long term buffer at remote
+	 * end for the following resets:
+	 * FAILOVER, MOBILITY, TIMEOUT.
+	 */
+	if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
+	    adapter->reset_reason != VNIC_RESET_MOBILITY &&
+	    adapter->reset_reason != VNIC_RESET_TIMEOUT)
+		send_request_unmap(adapter, ltb->map_id);
+
+	dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
+
+	ltb->buff = NULL;
+	/* mark this map_id free */
+	bitmap_clear(adapter->map_ids, ltb->map_id, 1);
+	ltb->map_id = 0;
+}
+
+/**
+ * free_ltb_set - free the given set of long term buffers (LTBS)
+ * @adapter: The ibmvnic adapter containing this ltb set
+ * @ltb_set: The ltb_set to be freed
+ *
+ * Free the set of LTBs in the given set.
+ */
+
+static void free_ltb_set(struct ibmvnic_adapter *adapter,
+			 struct ibmvnic_ltb_set *ltb_set)
+{
+	int i;
+
+	for (i = 0; i < ltb_set->num_ltbs; i++)
+		free_long_term_buff(adapter, &ltb_set->ltbs[i]);
+
+	kfree(ltb_set->ltbs);
+	ltb_set->ltbs = NULL;
+	ltb_set->num_ltbs = 0;
+}
+
+/**
+ * alloc_ltb_set() - Allocate a set of long term buffers (LTBs)
+ *
+ * @adapter: ibmvnic adapter associated to the LTB
+ * @ltb_set: container object for the set of LTBs
+ * @num_buffs: Number of buffers in the LTB
+ * @buff_size: Size of each buffer in the LTB
+ *
+ * Allocate a set of LTBs to accommodate @num_buffs buffers of @buff_size
+ * each. We currently cap size each LTB to IBMVNIC_ONE_LTB_SIZE. If the
+ * new set of LTBs have fewer LTBs than the old set, free the excess LTBs.
+ * If new set needs more than in old set, allocate the remaining ones.
+ * Try and reuse as many LTBs as possible and avoid reallocation.
+ *
+ * Any changes to this allocation strategy must be reflected in
+ * map_rxpool_buff_to_ltb() and map_txpool_buff_to_ltb().
+ */
+static int alloc_ltb_set(struct ibmvnic_adapter *adapter,
+			 struct ibmvnic_ltb_set *ltb_set, int num_buffs,
+			 int buff_size)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_ltb_set old_set;
+	struct ibmvnic_ltb_set new_set;
+	int rem_size;
+	int tot_size;		/* size of all ltbs */
+	int ltb_size;		/* size of one ltb */
+	int nltbs;
+	int rc;
+	int n;
+	int i;
+
+	dev_dbg(dev, "%s() num_buffs %d, buff_size %d\n", __func__, num_buffs,
+		buff_size);
+
+	ltb_size = rounddown(IBMVNIC_ONE_LTB_SIZE, buff_size);
+	tot_size = num_buffs * buff_size;
+
+	if (ltb_size > tot_size)
+		ltb_size = tot_size;
+
+	nltbs = tot_size / ltb_size;
+	if (tot_size % ltb_size)
+		nltbs++;
+
+	old_set = *ltb_set;
+
+	if (old_set.num_ltbs == nltbs) {
+		new_set = old_set;
+	} else {
+		int tmp = nltbs * sizeof(struct ibmvnic_long_term_buff);
+
+		new_set.ltbs = kzalloc(tmp, GFP_KERNEL);
+		if (!new_set.ltbs)
+			return -ENOMEM;
+
+		new_set.num_ltbs = nltbs;
+
+		/* Free any excess ltbs in old set */
+		for (i = new_set.num_ltbs; i < old_set.num_ltbs; i++)
+			free_long_term_buff(adapter, &old_set.ltbs[i]);
+
+		/* Copy remaining ltbs to new set. All LTBs except the
+		 * last one are of the same size. alloc_long_term_buff()
+		 * will realloc if the size changes.
+		 */
+		n = min(old_set.num_ltbs, new_set.num_ltbs);
+		for (i = 0; i < n; i++)
+			new_set.ltbs[i] = old_set.ltbs[i];
+
+		/* Any additional ltbs in new set will have NULL ltbs for
+		 * now and will be allocated in alloc_long_term_buff().
+		 */
+
+		/* We no longer need the old_set so free it. Note that we
+		 * may have reused some ltbs from old set and freed excess
+		 * ltbs above. So we only need to free the container now
+		 * not the LTBs themselves. (i.e. dont free_ltb_set()!)
+		 */
+		kfree(old_set.ltbs);
+		old_set.ltbs = NULL;
+		old_set.num_ltbs = 0;
+
+		/* Install the new set. If allocations fail below, we will
+		 * retry later and know what size LTBs we need.
+		 */
+		*ltb_set = new_set;
+	}
+
+	i = 0;
+	rem_size = tot_size;
+	while (rem_size) {
+		if (ltb_size > rem_size)
+			ltb_size = rem_size;
+
+		rem_size -= ltb_size;
+
+		rc = alloc_long_term_buff(adapter, &new_set.ltbs[i], ltb_size);
+		if (rc)
+			goto out;
+		i++;
+	}
+
+	WARN_ON(i != new_set.num_ltbs);
+
+	return 0;
+out:
+	/* We may have allocated one/more LTBs before failing and we
+	 * want to try and reuse on next reset. So don't free ltb set.
+	 */
+	return rc;
+}
+
+/**
+ * map_rxpool_buf_to_ltb - Map given rxpool buffer to offset in an LTB.
+ * @rxpool: The receive buffer pool containing buffer
+ * @bufidx: Index of buffer in rxpool
+ * @ltbp: (Output) pointer to the long term buffer containing the buffer
+ * @offset: (Output) offset of buffer in the LTB from @ltbp
+ *
+ * Map the given buffer identified by [rxpool, bufidx] to an LTB in the
+ * pool and its corresponding offset. Assume for now that each LTB is of
+ * different size but could possibly be optimized based on the allocation
+ * strategy in alloc_ltb_set().
+ */
+static void map_rxpool_buf_to_ltb(struct ibmvnic_rx_pool *rxpool,
+				  unsigned int bufidx,
+				  struct ibmvnic_long_term_buff **ltbp,
+				  unsigned int *offset)
+{
+	struct ibmvnic_long_term_buff *ltb;
+	int nbufs;	/* # of buffers in one ltb */
+	int i;
+
+	WARN_ON(bufidx >= rxpool->size);
+
+	for (i = 0; i < rxpool->ltb_set.num_ltbs; i++) {
+		ltb = &rxpool->ltb_set.ltbs[i];
+		nbufs = ltb->size / rxpool->buff_size;
+		if (bufidx < nbufs)
+			break;
+		bufidx -= nbufs;
+	}
+
+	*ltbp = ltb;
+	*offset = bufidx * rxpool->buff_size;
+}
+
+/**
+ * map_txpool_buf_to_ltb - Map given txpool buffer to offset in an LTB.
+ * @txpool: The transmit buffer pool containing buffer
+ * @bufidx: Index of buffer in txpool
+ * @ltbp: (Output) pointer to the long term buffer (LTB) containing the buffer
+ * @offset: (Output) offset of buffer in the LTB from @ltbp
+ *
+ * Map the given buffer identified by [txpool, bufidx] to an LTB in the
+ * pool and its corresponding offset.
+ */
+static void map_txpool_buf_to_ltb(struct ibmvnic_tx_pool *txpool,
+				  unsigned int bufidx,
+				  struct ibmvnic_long_term_buff **ltbp,
+				  unsigned int *offset)
+{
+	struct ibmvnic_long_term_buff *ltb;
+	int nbufs;	/* # of buffers in one ltb */
+	int i;
+
+	WARN_ON_ONCE(bufidx >= txpool->num_buffers);
+
+	for (i = 0; i < txpool->ltb_set.num_ltbs; i++) {
+		ltb = &txpool->ltb_set.ltbs[i];
+		nbufs = ltb->size / txpool->buf_size;
+		if (bufidx < nbufs)
+			break;
+		bufidx -= nbufs;
+	}
+
+	*ltbp = ltb;
+	*offset = bufidx * txpool->buf_size;
+}
+
+static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	for (i = 0; i < adapter->num_active_rx_pools; i++)
+		adapter->rx_pool[i].active = 0;
+}
+
+static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
+			      struct ibmvnic_rx_pool *pool)
+{
+	int count = pool->size - atomic_read(&pool->available);
+	u64 handle = adapter->rx_scrq[pool->index]->handle;
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_ind_xmit_queue *ind_bufp;
+	struct ibmvnic_sub_crq_queue *rx_scrq;
+	struct ibmvnic_long_term_buff *ltb;
+	union sub_crq *sub_crq;
+	int buffers_added = 0;
+	unsigned long lpar_rc;
+	struct sk_buff *skb;
+	unsigned int offset;
+	dma_addr_t dma_addr;
+	unsigned char *dst;
+	int shift = 0;
+	int bufidx;
+	int i;
+
+	if (!pool->active)
+		return;
+
+	rx_scrq = adapter->rx_scrq[pool->index];
+	ind_bufp = &rx_scrq->ind_buf;
+
+	/* netdev_skb_alloc() could have failed after we saved a few skbs
+	 * in the indir_buf and we would not have sent them to VIOS yet.
+	 * To account for them, start the loop at ind_bufp->index rather
+	 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will
+	 * be 0.
+	 */
+	for (i = ind_bufp->index; i < count; ++i) {
+		bufidx = pool->free_map[pool->next_free];
+
+		/* We maybe reusing the skb from earlier resets. Allocate
+		 * only if necessary. But since the LTB may have changed
+		 * during reset (see init_rx_pools()), update LTB below
+		 * even if reusing skb.
+		 */
+		skb = pool->rx_buff[bufidx].skb;
+		if (!skb) {
+			skb = netdev_alloc_skb(adapter->netdev,
+					       pool->buff_size);
+			if (!skb) {
+				dev_err(dev, "Couldn't replenish rx buff\n");
+				adapter->replenish_no_mem++;
+				break;
+			}
+		}
+
+		pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
+		pool->next_free = (pool->next_free + 1) % pool->size;
+
+		/* Copy the skb to the long term mapped DMA buffer */
+		map_rxpool_buf_to_ltb(pool, bufidx, &ltb, &offset);
+		dst = ltb->buff + offset;
+		memset(dst, 0, pool->buff_size);
+		dma_addr = ltb->addr + offset;
+
+		/* add the skb to an rx_buff in the pool */
+		pool->rx_buff[bufidx].data = dst;
+		pool->rx_buff[bufidx].dma = dma_addr;
+		pool->rx_buff[bufidx].skb = skb;
+		pool->rx_buff[bufidx].pool_index = pool->index;
+		pool->rx_buff[bufidx].size = pool->buff_size;
+
+		/* queue the rx_buff for the next send_subcrq_indirect */
+		sub_crq = &ind_bufp->indir_arr[ind_bufp->index++];
+		memset(sub_crq, 0, sizeof(*sub_crq));
+		sub_crq->rx_add.first = IBMVNIC_CRQ_CMD;
+		sub_crq->rx_add.correlator =
+		    cpu_to_be64((u64)&pool->rx_buff[bufidx]);
+		sub_crq->rx_add.ioba = cpu_to_be32(dma_addr);
+		sub_crq->rx_add.map_id = ltb->map_id;
+
+		/* The length field of the sCRQ is defined to be 24 bits so the
+		 * buffer size needs to be left shifted by a byte before it is
+		 * converted to big endian to prevent the last byte from being
+		 * truncated.
+		 */
+#ifdef __LITTLE_ENDIAN__
+		shift = 8;
+#endif
+		sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift);
+
+		/* if send_subcrq_indirect queue is full, flush to VIOS */
+		if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS ||
+		    i == count - 1) {
+			lpar_rc =
+				send_subcrq_indirect(adapter, handle,
+						     (u64)ind_bufp->indir_dma,
+						     (u64)ind_bufp->index);
+			if (lpar_rc != H_SUCCESS)
+				goto failure;
+			buffers_added += ind_bufp->index;
+			adapter->replenish_add_buff_success += ind_bufp->index;
+			ind_bufp->index = 0;
+		}
+	}
+	atomic_add(buffers_added, &pool->available);
+	return;
+
+failure:
+	if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
+		dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
+	for (i = ind_bufp->index - 1; i >= 0; --i) {
+		struct ibmvnic_rx_buff *rx_buff;
+
+		pool->next_free = pool->next_free == 0 ?
+				  pool->size - 1 : pool->next_free - 1;
+		sub_crq = &ind_bufp->indir_arr[i];
+		rx_buff = (struct ibmvnic_rx_buff *)
+				be64_to_cpu(sub_crq->rx_add.correlator);
+		bufidx = (int)(rx_buff - pool->rx_buff);
+		pool->free_map[pool->next_free] = bufidx;
+		dev_kfree_skb_any(pool->rx_buff[bufidx].skb);
+		pool->rx_buff[bufidx].skb = NULL;
+	}
+	adapter->replenish_add_buff_failure += ind_bufp->index;
+	atomic_add(buffers_added, &pool->available);
+	ind_bufp->index = 0;
+	if (lpar_rc == H_CLOSED || adapter->failover_pending) {
+		/* Disable buffer pool replenishment and report carrier off if
+		 * queue is closed or pending failover.
+		 * Firmware guarantees that a signal will be sent to the
+		 * driver, triggering a reset.
+		 */
+		deactivate_rx_pools(adapter);
+		netif_carrier_off(adapter->netdev);
+	}
+}
+
+static void replenish_pools(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	adapter->replenish_task_cycles++;
+	for (i = 0; i < adapter->num_active_rx_pools; i++) {
+		if (adapter->rx_pool[i].active)
+			replenish_rx_pool(adapter, &adapter->rx_pool[i]);
+	}
+
+	netdev_dbg(adapter->netdev, "Replenished %d pools\n", i);
+}
+
+static void release_stats_buffers(struct ibmvnic_adapter *adapter)
+{
+	kfree(adapter->tx_stats_buffers);
+	kfree(adapter->rx_stats_buffers);
+	adapter->tx_stats_buffers = NULL;
+	adapter->rx_stats_buffers = NULL;
+}
+
+static int init_stats_buffers(struct ibmvnic_adapter *adapter)
+{
+	adapter->tx_stats_buffers =
+				kcalloc(IBMVNIC_MAX_QUEUES,
+					sizeof(struct ibmvnic_tx_queue_stats),
+					GFP_KERNEL);
+	if (!adapter->tx_stats_buffers)
+		return -ENOMEM;
+
+	adapter->rx_stats_buffers =
+				kcalloc(IBMVNIC_MAX_QUEUES,
+					sizeof(struct ibmvnic_rx_queue_stats),
+					GFP_KERNEL);
+	if (!adapter->rx_stats_buffers)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void release_stats_token(struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+
+	if (!adapter->stats_token)
+		return;
+
+	dma_unmap_single(dev, adapter->stats_token,
+			 sizeof(struct ibmvnic_statistics),
+			 DMA_FROM_DEVICE);
+	adapter->stats_token = 0;
+}
+
+static int init_stats_token(struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	dma_addr_t stok;
+	int rc;
+
+	stok = dma_map_single(dev, &adapter->stats,
+			      sizeof(struct ibmvnic_statistics),
+			      DMA_FROM_DEVICE);
+	rc = dma_mapping_error(dev, stok);
+	if (rc) {
+		dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc);
+		return rc;
+	}
+
+	adapter->stats_token = stok;
+	netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
+	return 0;
+}
+
+/**
+ * release_rx_pools() - Release any rx pools attached to @adapter.
+ * @adapter: ibmvnic adapter
+ *
+ * Safe to call this multiple times - even if no pools are attached.
+ */
+static void release_rx_pools(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_rx_pool *rx_pool;
+	int i, j;
+
+	if (!adapter->rx_pool)
+		return;
+
+	for (i = 0; i < adapter->num_active_rx_pools; i++) {
+		rx_pool = &adapter->rx_pool[i];
+
+		netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
+
+		kfree(rx_pool->free_map);
+
+		free_ltb_set(adapter, &rx_pool->ltb_set);
+
+		if (!rx_pool->rx_buff)
+			continue;
+
+		for (j = 0; j < rx_pool->size; j++) {
+			if (rx_pool->rx_buff[j].skb) {
+				dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
+				rx_pool->rx_buff[j].skb = NULL;
+			}
+		}
+
+		kfree(rx_pool->rx_buff);
+	}
+
+	kfree(adapter->rx_pool);
+	adapter->rx_pool = NULL;
+	adapter->num_active_rx_pools = 0;
+	adapter->prev_rx_pool_size = 0;
+}
+
+/**
+ * reuse_rx_pools() - Check if the existing rx pools can be reused.
+ * @adapter: ibmvnic adapter
+ *
+ * Check if the existing rx pools in the adapter can be reused. The
+ * pools can be reused if the pool parameters (number of pools,
+ * number of buffers in the pool and size of each buffer) have not
+ * changed.
+ *
+ * NOTE: This assumes that all pools have the same number of buffers
+ *       which is the case currently. If that changes, we must fix this.
+ *
+ * Return: true if the rx pools can be reused, false otherwise.
+ */
+static bool reuse_rx_pools(struct ibmvnic_adapter *adapter)
+{
+	u64 old_num_pools, new_num_pools;
+	u64 old_pool_size, new_pool_size;
+	u64 old_buff_size, new_buff_size;
+
+	if (!adapter->rx_pool)
+		return false;
+
+	old_num_pools = adapter->num_active_rx_pools;
+	new_num_pools = adapter->req_rx_queues;
+
+	old_pool_size = adapter->prev_rx_pool_size;
+	new_pool_size = adapter->req_rx_add_entries_per_subcrq;
+
+	old_buff_size = adapter->prev_rx_buf_sz;
+	new_buff_size = adapter->cur_rx_buf_sz;
+
+	if (old_buff_size != new_buff_size ||
+	    old_num_pools != new_num_pools ||
+	    old_pool_size != new_pool_size)
+		return false;
+
+	return true;
+}
+
+/**
+ * init_rx_pools(): Initialize the set of receiver pools in the adapter.
+ * @netdev: net device associated with the vnic interface
+ *
+ * Initialize the set of receiver pools in the ibmvnic adapter associated
+ * with the net_device @netdev. If possible, reuse the existing rx pools.
+ * Otherwise free any existing pools and  allocate a new set of pools
+ * before initializing them.
+ *
+ * Return: 0 on success and negative value on error.
+ */
+static int init_rx_pools(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_rx_pool *rx_pool;
+	u64 num_pools;
+	u64 pool_size;		/* # of buffers in one pool */
+	u64 buff_size;
+	int i, j, rc;
+
+	pool_size = adapter->req_rx_add_entries_per_subcrq;
+	num_pools = adapter->req_rx_queues;
+	buff_size = adapter->cur_rx_buf_sz;
+
+	if (reuse_rx_pools(adapter)) {
+		dev_dbg(dev, "Reusing rx pools\n");
+		goto update_ltb;
+	}
+
+	/* Allocate/populate the pools. */
+	release_rx_pools(adapter);
+
+	adapter->rx_pool = kcalloc(num_pools,
+				   sizeof(struct ibmvnic_rx_pool),
+				   GFP_KERNEL);
+	if (!adapter->rx_pool) {
+		dev_err(dev, "Failed to allocate rx pools\n");
+		return -ENOMEM;
+	}
+
+	/* Set num_active_rx_pools early. If we fail below after partial
+	 * allocation, release_rx_pools() will know how many to look for.
+	 */
+	adapter->num_active_rx_pools = num_pools;
+
+	for (i = 0; i < num_pools; i++) {
+		rx_pool = &adapter->rx_pool[i];
+
+		netdev_dbg(adapter->netdev,
+			   "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
+			   i, pool_size, buff_size);
+
+		rx_pool->size = pool_size;
+		rx_pool->index = i;
+		rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
+
+		rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
+					    GFP_KERNEL);
+		if (!rx_pool->free_map) {
+			dev_err(dev, "Couldn't alloc free_map %d\n", i);
+			rc = -ENOMEM;
+			goto out_release;
+		}
+
+		rx_pool->rx_buff = kcalloc(rx_pool->size,
+					   sizeof(struct ibmvnic_rx_buff),
+					   GFP_KERNEL);
+		if (!rx_pool->rx_buff) {
+			dev_err(dev, "Couldn't alloc rx buffers\n");
+			rc = -ENOMEM;
+			goto out_release;
+		}
+	}
+
+	adapter->prev_rx_pool_size = pool_size;
+	adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz;
+
+update_ltb:
+	for (i = 0; i < num_pools; i++) {
+		rx_pool = &adapter->rx_pool[i];
+		dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n",
+			i, rx_pool->size, rx_pool->buff_size);
+
+		rc = alloc_ltb_set(adapter, &rx_pool->ltb_set,
+				   rx_pool->size, rx_pool->buff_size);
+		if (rc)
+			goto out;
+
+		for (j = 0; j < rx_pool->size; ++j) {
+			struct ibmvnic_rx_buff *rx_buff;
+
+			rx_pool->free_map[j] = j;
+
+			/* NOTE: Don't clear rx_buff->skb here - will leak
+			 * memory! replenish_rx_pool() will reuse skbs or
+			 * allocate as necessary.
+			 */
+			rx_buff = &rx_pool->rx_buff[j];
+			rx_buff->dma = 0;
+			rx_buff->data = 0;
+			rx_buff->size = 0;
+			rx_buff->pool_index = 0;
+		}
+
+		/* Mark pool "empty" so replenish_rx_pools() will
+		 * update the LTB info for each buffer
+		 */
+		atomic_set(&rx_pool->available, 0);
+		rx_pool->next_alloc = 0;
+		rx_pool->next_free = 0;
+		/* replenish_rx_pool() may have called deactivate_rx_pools()
+		 * on failover. Ensure pool is active now.
+		 */
+		rx_pool->active = 1;
+	}
+	return 0;
+out_release:
+	release_rx_pools(adapter);
+out:
+	/* We failed to allocate one or more LTBs or map them on the VIOS.
+	 * Hold onto the pools and any LTBs that we did allocate/map.
+	 */
+	return rc;
+}
+
+static void release_vpd_data(struct ibmvnic_adapter *adapter)
+{
+	if (!adapter->vpd)
+		return;
+
+	kfree(adapter->vpd->buff);
+	kfree(adapter->vpd);
+
+	adapter->vpd = NULL;
+}
+
+static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
+				struct ibmvnic_tx_pool *tx_pool)
+{
+	kfree(tx_pool->tx_buff);
+	kfree(tx_pool->free_map);
+	free_ltb_set(adapter, &tx_pool->ltb_set);
+}
+
+/**
+ * release_tx_pools() - Release any tx pools attached to @adapter.
+ * @adapter: ibmvnic adapter
+ *
+ * Safe to call this multiple times - even if no pools are attached.
+ */
+static void release_tx_pools(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	/* init_tx_pools() ensures that ->tx_pool and ->tso_pool are
+	 * both NULL or both non-NULL. So we only need to check one.
+	 */
+	if (!adapter->tx_pool)
+		return;
+
+	for (i = 0; i < adapter->num_active_tx_pools; i++) {
+		release_one_tx_pool(adapter, &adapter->tx_pool[i]);
+		release_one_tx_pool(adapter, &adapter->tso_pool[i]);
+	}
+
+	kfree(adapter->tx_pool);
+	adapter->tx_pool = NULL;
+	kfree(adapter->tso_pool);
+	adapter->tso_pool = NULL;
+	adapter->num_active_tx_pools = 0;
+	adapter->prev_tx_pool_size = 0;
+}
+
+static int init_one_tx_pool(struct net_device *netdev,
+			    struct ibmvnic_tx_pool *tx_pool,
+			    int pool_size, int buf_size)
+{
+	int i;
+
+	tx_pool->tx_buff = kcalloc(pool_size,
+				   sizeof(struct ibmvnic_tx_buff),
+				   GFP_KERNEL);
+	if (!tx_pool->tx_buff)
+		return -ENOMEM;
+
+	tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL);
+	if (!tx_pool->free_map) {
+		kfree(tx_pool->tx_buff);
+		tx_pool->tx_buff = NULL;
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < pool_size; i++)
+		tx_pool->free_map[i] = i;
+
+	tx_pool->consumer_index = 0;
+	tx_pool->producer_index = 0;
+	tx_pool->num_buffers = pool_size;
+	tx_pool->buf_size = buf_size;
+
+	return 0;
+}
+
+/**
+ * reuse_tx_pools() - Check if the existing tx pools can be reused.
+ * @adapter: ibmvnic adapter
+ *
+ * Check if the existing tx pools in the adapter can be reused. The
+ * pools can be reused if the pool parameters (number of pools,
+ * number of buffers in the pool and mtu) have not changed.
+ *
+ * NOTE: This assumes that all pools have the same number of buffers
+ *       which is the case currently. If that changes, we must fix this.
+ *
+ * Return: true if the tx pools can be reused, false otherwise.
+ */
+static bool reuse_tx_pools(struct ibmvnic_adapter *adapter)
+{
+	u64 old_num_pools, new_num_pools;
+	u64 old_pool_size, new_pool_size;
+	u64 old_mtu, new_mtu;
+
+	if (!adapter->tx_pool)
+		return false;
+
+	old_num_pools = adapter->num_active_tx_pools;
+	new_num_pools = adapter->num_active_tx_scrqs;
+	old_pool_size = adapter->prev_tx_pool_size;
+	new_pool_size = adapter->req_tx_entries_per_subcrq;
+	old_mtu = adapter->prev_mtu;
+	new_mtu = adapter->req_mtu;
+
+	if (old_mtu != new_mtu ||
+	    old_num_pools != new_num_pools ||
+	    old_pool_size != new_pool_size)
+		return false;
+
+	return true;
+}
+
+/**
+ * init_tx_pools(): Initialize the set of transmit pools in the adapter.
+ * @netdev: net device associated with the vnic interface
+ *
+ * Initialize the set of transmit pools in the ibmvnic adapter associated
+ * with the net_device @netdev. If possible, reuse the existing tx pools.
+ * Otherwise free any existing pools and  allocate a new set of pools
+ * before initializing them.
+ *
+ * Return: 0 on success and negative value on error.
+ */
+static int init_tx_pools(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct device *dev = &adapter->vdev->dev;
+	int num_pools;
+	u64 pool_size;		/* # of buffers in pool */
+	u64 buff_size;
+	int i, j, rc;
+
+	num_pools = adapter->req_tx_queues;
+
+	/* We must notify the VIOS about the LTB on all resets - but we only
+	 * need to alloc/populate pools if either the number of buffers or
+	 * size of each buffer in the pool has changed.
+	 */
+	if (reuse_tx_pools(adapter)) {
+		netdev_dbg(netdev, "Reusing tx pools\n");
+		goto update_ltb;
+	}
+
+	/* Allocate/populate the pools. */
+	release_tx_pools(adapter);
+
+	pool_size = adapter->req_tx_entries_per_subcrq;
+	num_pools = adapter->num_active_tx_scrqs;
+
+	adapter->tx_pool = kcalloc(num_pools,
+				   sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
+	if (!adapter->tx_pool)
+		return -ENOMEM;
+
+	adapter->tso_pool = kcalloc(num_pools,
+				    sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
+	/* To simplify release_tx_pools() ensure that ->tx_pool and
+	 * ->tso_pool are either both NULL or both non-NULL.
+	 */
+	if (!adapter->tso_pool) {
+		kfree(adapter->tx_pool);
+		adapter->tx_pool = NULL;
+		return -ENOMEM;
+	}
+
+	/* Set num_active_tx_pools early. If we fail below after partial
+	 * allocation, release_tx_pools() will know how many to look for.
+	 */
+	adapter->num_active_tx_pools = num_pools;
+
+	buff_size = adapter->req_mtu + VLAN_HLEN;
+	buff_size = ALIGN(buff_size, L1_CACHE_BYTES);
+
+	for (i = 0; i < num_pools; i++) {
+		dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n",
+			i, adapter->req_tx_entries_per_subcrq, buff_size);
+
+		rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
+				      pool_size, buff_size);
+		if (rc)
+			goto out_release;
+
+		rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
+				      IBMVNIC_TSO_BUFS,
+				      IBMVNIC_TSO_BUF_SZ);
+		if (rc)
+			goto out_release;
+	}
+
+	adapter->prev_tx_pool_size = pool_size;
+	adapter->prev_mtu = adapter->req_mtu;
+
+update_ltb:
+	/* NOTE: All tx_pools have the same number of buffers (which is
+	 *       same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS
+	 *       buffers (see calls init_one_tx_pool() for these).
+	 *       For consistency, we use tx_pool->num_buffers and
+	 *       tso_pool->num_buffers below.
+	 */
+	rc = -1;
+	for (i = 0; i < num_pools; i++) {
+		struct ibmvnic_tx_pool *tso_pool;
+		struct ibmvnic_tx_pool *tx_pool;
+
+		tx_pool = &adapter->tx_pool[i];
+
+		dev_dbg(dev, "Updating LTB for tx pool %d [%d, %d]\n",
+			i, tx_pool->num_buffers, tx_pool->buf_size);
+
+		rc = alloc_ltb_set(adapter, &tx_pool->ltb_set,
+				   tx_pool->num_buffers, tx_pool->buf_size);
+		if (rc)
+			goto out;
+
+		tx_pool->consumer_index = 0;
+		tx_pool->producer_index = 0;
+
+		for (j = 0; j < tx_pool->num_buffers; j++)
+			tx_pool->free_map[j] = j;
+
+		tso_pool = &adapter->tso_pool[i];
+
+		dev_dbg(dev, "Updating LTB for tso pool %d [%d, %d]\n",
+			i, tso_pool->num_buffers, tso_pool->buf_size);
+
+		rc = alloc_ltb_set(adapter, &tso_pool->ltb_set,
+				   tso_pool->num_buffers, tso_pool->buf_size);
+		if (rc)
+			goto out;
+
+		tso_pool->consumer_index = 0;
+		tso_pool->producer_index = 0;
+
+		for (j = 0; j < tso_pool->num_buffers; j++)
+			tso_pool->free_map[j] = j;
+	}
+
+	return 0;
+out_release:
+	release_tx_pools(adapter);
+out:
+	/* We failed to allocate one or more LTBs or map them on the VIOS.
+	 * Hold onto the pools and any LTBs that we did allocate/map.
+	 */
+	return rc;
+}
+
+static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	if (adapter->napi_enabled)
+		return;
+
+	for (i = 0; i < adapter->req_rx_queues; i++)
+		napi_enable(&adapter->napi[i]);
+
+	adapter->napi_enabled = true;
+}
+
+static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	if (!adapter->napi_enabled)
+		return;
+
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
+		napi_disable(&adapter->napi[i]);
+	}
+
+	adapter->napi_enabled = false;
+}
+
+static int init_napi(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	adapter->napi = kcalloc(adapter->req_rx_queues,
+				sizeof(struct napi_struct), GFP_KERNEL);
+	if (!adapter->napi)
+		return -ENOMEM;
+
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
+		netif_napi_add(adapter->netdev, &adapter->napi[i],
+			       ibmvnic_poll);
+	}
+
+	adapter->num_active_rx_napi = adapter->req_rx_queues;
+	return 0;
+}
+
+static void release_napi(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	if (!adapter->napi)
+		return;
+
+	for (i = 0; i < adapter->num_active_rx_napi; i++) {
+		netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
+		netif_napi_del(&adapter->napi[i]);
+	}
+
+	kfree(adapter->napi);
+	adapter->napi = NULL;
+	adapter->num_active_rx_napi = 0;
+	adapter->napi_enabled = false;
+}
+
+static const char *adapter_state_to_string(enum vnic_state state)
+{
+	switch (state) {
+	case VNIC_PROBING:
+		return "PROBING";
+	case VNIC_PROBED:
+		return "PROBED";
+	case VNIC_OPENING:
+		return "OPENING";
+	case VNIC_OPEN:
+		return "OPEN";
+	case VNIC_CLOSING:
+		return "CLOSING";
+	case VNIC_CLOSED:
+		return "CLOSED";
+	case VNIC_REMOVING:
+		return "REMOVING";
+	case VNIC_REMOVED:
+		return "REMOVED";
+	case VNIC_DOWN:
+		return "DOWN";
+	}
+	return "UNKNOWN";
+}
+
+static int ibmvnic_login(struct net_device *netdev)
+{
+	unsigned long flags, timeout = msecs_to_jiffies(20000);
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int retry_count = 0;
+	int retries = 10;
+	bool retry;
+	int rc;
+
+	do {
+		retry = false;
+		if (retry_count > retries) {
+			netdev_warn(netdev, "Login attempts exceeded\n");
+			return -EACCES;
+		}
+
+		adapter->init_done_rc = 0;
+		reinit_completion(&adapter->init_done);
+		rc = send_login(adapter);
+		if (rc)
+			return rc;
+
+		if (!wait_for_completion_timeout(&adapter->init_done,
+						 timeout)) {
+			netdev_warn(netdev, "Login timed out\n");
+			adapter->login_pending = false;
+			goto partial_reset;
+		}
+
+		if (adapter->init_done_rc == ABORTED) {
+			netdev_warn(netdev, "Login aborted, retrying...\n");
+			retry = true;
+			adapter->init_done_rc = 0;
+			retry_count++;
+			/* FW or device may be busy, so
+			 * wait a bit before retrying login
+			 */
+			msleep(500);
+		} else if (adapter->init_done_rc == PARTIALSUCCESS) {
+			retry_count++;
+			release_sub_crqs(adapter, 1);
+
+			retry = true;
+			netdev_dbg(netdev,
+				   "Received partial success, retrying...\n");
+			adapter->init_done_rc = 0;
+			reinit_completion(&adapter->init_done);
+			send_query_cap(adapter);
+			if (!wait_for_completion_timeout(&adapter->init_done,
+							 timeout)) {
+				netdev_warn(netdev,
+					    "Capabilities query timed out\n");
+				return -ETIMEDOUT;
+			}
+
+			rc = init_sub_crqs(adapter);
+			if (rc) {
+				netdev_warn(netdev,
+					    "SCRQ initialization failed\n");
+				return rc;
+			}
+
+			rc = init_sub_crq_irqs(adapter);
+			if (rc) {
+				netdev_warn(netdev,
+					    "SCRQ irq initialization failed\n");
+				return rc;
+			}
+		/* Default/timeout error handling, reset and start fresh */
+		} else if (adapter->init_done_rc) {
+			netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n",
+				    adapter->init_done_rc);
+
+partial_reset:
+			/* adapter login failed, so free any CRQs or sub-CRQs
+			 * and register again before attempting to login again.
+			 * If we don't do this then the VIOS may think that
+			 * we are already logged in and reject any subsequent
+			 * attempts
+			 */
+			netdev_warn(netdev,
+				    "Freeing and re-registering CRQs before attempting to login again\n");
+			retry = true;
+			adapter->init_done_rc = 0;
+			release_sub_crqs(adapter, true);
+			/* Much of this is similar logic as ibmvnic_probe(),
+			 * we are essentially re-initializing communication
+			 * with the server. We really should not run any
+			 * resets/failovers here because this is already a form
+			 * of reset and we do not want parallel resets occurring
+			 */
+			do {
+				reinit_init_done(adapter);
+				/* Clear any failovers we got in the previous
+				 * pass since we are re-initializing the CRQ
+				 */
+				adapter->failover_pending = false;
+				release_crq_queue(adapter);
+				/* If we don't sleep here then we risk an
+				 * unnecessary failover event from the VIOS.
+				 * This is a known VIOS issue caused by a vnic
+				 * device freeing and registering a CRQ too
+				 * quickly.
+				 */
+				msleep(1500);
+				/* Avoid any resets, since we are currently
+				 * resetting.
+				 */
+				spin_lock_irqsave(&adapter->rwi_lock, flags);
+				flush_reset_queue(adapter);
+				spin_unlock_irqrestore(&adapter->rwi_lock,
+						       flags);
+
+				rc = init_crq_queue(adapter);
+				if (rc) {
+					netdev_err(netdev, "login recovery: init CRQ failed %d\n",
+						   rc);
+					return -EIO;
+				}
+
+				rc = ibmvnic_reset_init(adapter, false);
+				if (rc)
+					netdev_err(netdev, "login recovery: Reset init failed %d\n",
+						   rc);
+				/* IBMVNIC_CRQ_INIT will return EAGAIN if it
+				 * fails, since ibmvnic_reset_init will free
+				 * irq's in failure, we won't be able to receive
+				 * new CRQs so we need to keep trying. probe()
+				 * handles this similarly.
+				 */
+			} while (rc == -EAGAIN && retry_count++ < retries);
+		}
+	} while (retry);
+
+	__ibmvnic_set_mac(netdev, adapter->mac_addr);
+
+	netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state));
+	return 0;
+}
+
+static void release_login_buffer(struct ibmvnic_adapter *adapter)
+{
+	if (!adapter->login_buf)
+		return;
+
+	dma_unmap_single(&adapter->vdev->dev, adapter->login_buf_token,
+			 adapter->login_buf_sz, DMA_TO_DEVICE);
+	kfree(adapter->login_buf);
+	adapter->login_buf = NULL;
+}
+
+static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
+{
+	if (!adapter->login_rsp_buf)
+		return;
+
+	dma_unmap_single(&adapter->vdev->dev, adapter->login_rsp_buf_token,
+			 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
+	kfree(adapter->login_rsp_buf);
+	adapter->login_rsp_buf = NULL;
+}
+
+static void release_resources(struct ibmvnic_adapter *adapter)
+{
+	release_vpd_data(adapter);
+
+	release_napi(adapter);
+	release_login_buffer(adapter);
+	release_login_rsp_buffer(adapter);
+}
+
+static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
+{
+	struct net_device *netdev = adapter->netdev;
+	unsigned long timeout = msecs_to_jiffies(20000);
+	union ibmvnic_crq crq;
+	bool resend;
+	int rc;
+
+	netdev_dbg(netdev, "setting link state %d\n", link_state);
+
+	memset(&crq, 0, sizeof(crq));
+	crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
+	crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
+	crq.logical_link_state.link_state = link_state;
+
+	do {
+		resend = false;
+
+		reinit_completion(&adapter->init_done);
+		rc = ibmvnic_send_crq(adapter, &crq);
+		if (rc) {
+			netdev_err(netdev, "Failed to set link state\n");
+			return rc;
+		}
+
+		if (!wait_for_completion_timeout(&adapter->init_done,
+						 timeout)) {
+			netdev_err(netdev, "timeout setting link state\n");
+			return -ETIMEDOUT;
+		}
+
+		if (adapter->init_done_rc == PARTIALSUCCESS) {
+			/* Partuial success, delay and re-send */
+			mdelay(1000);
+			resend = true;
+		} else if (adapter->init_done_rc) {
+			netdev_warn(netdev, "Unable to set link state, rc=%d\n",
+				    adapter->init_done_rc);
+			return adapter->init_done_rc;
+		}
+	} while (resend);
+
+	return 0;
+}
+
+static int set_real_num_queues(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int rc;
+
+	netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
+		   adapter->req_tx_queues, adapter->req_rx_queues);
+
+	rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
+	if (rc) {
+		netdev_err(netdev, "failed to set the number of tx queues\n");
+		return rc;
+	}
+
+	rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
+	if (rc)
+		netdev_err(netdev, "failed to set the number of rx queues\n");
+
+	return rc;
+}
+
+static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	union ibmvnic_crq crq;
+	int len = 0;
+	int rc;
+
+	if (adapter->vpd->buff)
+		len = adapter->vpd->len;
+
+	mutex_lock(&adapter->fw_lock);
+	adapter->fw_done_rc = 0;
+	reinit_completion(&adapter->fw_done);
+
+	crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
+	crq.get_vpd_size.cmd = GET_VPD_SIZE;
+	rc = ibmvnic_send_crq(adapter, &crq);
+	if (rc) {
+		mutex_unlock(&adapter->fw_lock);
+		return rc;
+	}
+
+	rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
+	if (rc) {
+		dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
+		mutex_unlock(&adapter->fw_lock);
+		return rc;
+	}
+	mutex_unlock(&adapter->fw_lock);
+
+	if (!adapter->vpd->len)
+		return -ENODATA;
+
+	if (!adapter->vpd->buff)
+		adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
+	else if (adapter->vpd->len != len)
+		adapter->vpd->buff =
+			krealloc(adapter->vpd->buff,
+				 adapter->vpd->len, GFP_KERNEL);
+
+	if (!adapter->vpd->buff) {
+		dev_err(dev, "Could allocate VPD buffer\n");
+		return -ENOMEM;
+	}
+
+	adapter->vpd->dma_addr =
+		dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
+			       DMA_FROM_DEVICE);
+	if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
+		dev_err(dev, "Could not map VPD buffer\n");
+		kfree(adapter->vpd->buff);
+		adapter->vpd->buff = NULL;
+		return -ENOMEM;
+	}
+
+	mutex_lock(&adapter->fw_lock);
+	adapter->fw_done_rc = 0;
+	reinit_completion(&adapter->fw_done);
+
+	crq.get_vpd.first = IBMVNIC_CRQ_CMD;
+	crq.get_vpd.cmd = GET_VPD;
+	crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
+	crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
+	rc = ibmvnic_send_crq(adapter, &crq);
+	if (rc) {
+		kfree(adapter->vpd->buff);
+		adapter->vpd->buff = NULL;
+		mutex_unlock(&adapter->fw_lock);
+		return rc;
+	}
+
+	rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
+	if (rc) {
+		dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
+		kfree(adapter->vpd->buff);
+		adapter->vpd->buff = NULL;
+		mutex_unlock(&adapter->fw_lock);
+		return rc;
+	}
+
+	mutex_unlock(&adapter->fw_lock);
+	return 0;
+}
+
+static int init_resources(struct ibmvnic_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	int rc;
+
+	rc = set_real_num_queues(netdev);
+	if (rc)
+		return rc;
+
+	adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
+	if (!adapter->vpd)
+		return -ENOMEM;
+
+	/* Vital Product Data (VPD) */
+	rc = ibmvnic_get_vpd(adapter);
+	if (rc) {
+		netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
+		return rc;
+	}
+
+	rc = init_napi(adapter);
+	if (rc)
+		return rc;
+
+	send_query_map(adapter);
+
+	rc = init_rx_pools(netdev);
+	if (rc)
+		return rc;
+
+	rc = init_tx_pools(netdev);
+	return rc;
+}
+
+static int __ibmvnic_open(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	enum vnic_state prev_state = adapter->state;
+	int i, rc;
+
+	adapter->state = VNIC_OPENING;
+	replenish_pools(adapter);
+	ibmvnic_napi_enable(adapter);
+
+	/* We're ready to receive frames, enable the sub-crq interrupts and
+	 * set the logical link state to up
+	 */
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
+		if (prev_state == VNIC_CLOSED)
+			enable_irq(adapter->rx_scrq[i]->irq);
+		enable_scrq_irq(adapter, adapter->rx_scrq[i]);
+	}
+
+	for (i = 0; i < adapter->req_tx_queues; i++) {
+		netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
+		if (prev_state == VNIC_CLOSED)
+			enable_irq(adapter->tx_scrq[i]->irq);
+		enable_scrq_irq(adapter, adapter->tx_scrq[i]);
+		/* netdev_tx_reset_queue will reset dql stats. During NON_FATAL
+		 * resets, don't reset the stats because there could be batched
+		 * skb's waiting to be sent. If we reset dql stats, we risk
+		 * num_completed being greater than num_queued. This will cause
+		 * a BUG_ON in dql_completed().
+		 */
+		if (adapter->reset_reason != VNIC_RESET_NON_FATAL)
+			netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i));
+	}
+
+	rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
+	if (rc) {
+		ibmvnic_napi_disable(adapter);
+		ibmvnic_disable_irqs(adapter);
+		return rc;
+	}
+
+	adapter->tx_queues_active = true;
+
+	/* Since queues were stopped until now, there shouldn't be any
+	 * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we
+	 * don't need the synchronize_rcu()? Leaving it for consistency
+	 * with setting ->tx_queues_active = false.
+	 */
+	synchronize_rcu();
+
+	netif_tx_start_all_queues(netdev);
+
+	if (prev_state == VNIC_CLOSED) {
+		for (i = 0; i < adapter->req_rx_queues; i++)
+			napi_schedule(&adapter->napi[i]);
+	}
+
+	adapter->state = VNIC_OPEN;
+	return rc;
+}
+
+static int ibmvnic_open(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int rc;
+
+	ASSERT_RTNL();
+
+	/* If device failover is pending or we are about to reset, just set
+	 * device state and return. Device operation will be handled by reset
+	 * routine.
+	 *
+	 * It should be safe to overwrite the adapter->state here. Since
+	 * we hold the rtnl, either the reset has not actually started or
+	 * the rtnl got dropped during the set_link_state() in do_reset().
+	 * In the former case, no one else is changing the state (again we
+	 * have the rtnl) and in the latter case, do_reset() will detect and
+	 * honor our setting below.
+	 */
+	if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) {
+		netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n",
+			   adapter_state_to_string(adapter->state),
+			   adapter->failover_pending);
+		adapter->state = VNIC_OPEN;
+		rc = 0;
+		goto out;
+	}
+
+	if (adapter->state != VNIC_CLOSED) {
+		rc = ibmvnic_login(netdev);
+		if (rc)
+			goto out;
+
+		rc = init_resources(adapter);
+		if (rc) {
+			netdev_err(netdev, "failed to initialize resources\n");
+			goto out;
+		}
+	}
+
+	rc = __ibmvnic_open(netdev);
+
+out:
+	/* If open failed and there is a pending failover or in-progress reset,
+	 * set device state and return. Device operation will be handled by
+	 * reset routine. See also comments above regarding rtnl.
+	 */
+	if (rc &&
+	    (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) {
+		adapter->state = VNIC_OPEN;
+		rc = 0;
+	}
+
+	if (rc) {
+		release_resources(adapter);
+		release_rx_pools(adapter);
+		release_tx_pools(adapter);
+	}
+
+	return rc;
+}
+
+static void clean_rx_pools(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_rx_pool *rx_pool;
+	struct ibmvnic_rx_buff *rx_buff;
+	u64 rx_entries;
+	int rx_scrqs;
+	int i, j;
+
+	if (!adapter->rx_pool)
+		return;
+
+	rx_scrqs = adapter->num_active_rx_pools;
+	rx_entries = adapter->req_rx_add_entries_per_subcrq;
+
+	/* Free any remaining skbs in the rx buffer pools */
+	for (i = 0; i < rx_scrqs; i++) {
+		rx_pool = &adapter->rx_pool[i];
+		if (!rx_pool || !rx_pool->rx_buff)
+			continue;
+
+		netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
+		for (j = 0; j < rx_entries; j++) {
+			rx_buff = &rx_pool->rx_buff[j];
+			if (rx_buff && rx_buff->skb) {
+				dev_kfree_skb_any(rx_buff->skb);
+				rx_buff->skb = NULL;
+			}
+		}
+	}
+}
+
+static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
+			      struct ibmvnic_tx_pool *tx_pool)
+{
+	struct ibmvnic_tx_buff *tx_buff;
+	u64 tx_entries;
+	int i;
+
+	if (!tx_pool || !tx_pool->tx_buff)
+		return;
+
+	tx_entries = tx_pool->num_buffers;
+
+	for (i = 0; i < tx_entries; i++) {
+		tx_buff = &tx_pool->tx_buff[i];
+		if (tx_buff && tx_buff->skb) {
+			dev_kfree_skb_any(tx_buff->skb);
+			tx_buff->skb = NULL;
+		}
+	}
+}
+
+static void clean_tx_pools(struct ibmvnic_adapter *adapter)
+{
+	int tx_scrqs;
+	int i;
+
+	if (!adapter->tx_pool || !adapter->tso_pool)
+		return;
+
+	tx_scrqs = adapter->num_active_tx_pools;
+
+	/* Free any remaining skbs in the tx buffer pools */
+	for (i = 0; i < tx_scrqs; i++) {
+		netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
+		clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
+		clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
+	}
+}
+
+static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	int i;
+
+	if (adapter->tx_scrq) {
+		for (i = 0; i < adapter->req_tx_queues; i++)
+			if (adapter->tx_scrq[i]->irq) {
+				netdev_dbg(netdev,
+					   "Disabling tx_scrq[%d] irq\n", i);
+				disable_scrq_irq(adapter, adapter->tx_scrq[i]);
+				disable_irq(adapter->tx_scrq[i]->irq);
+			}
+	}
+
+	if (adapter->rx_scrq) {
+		for (i = 0; i < adapter->req_rx_queues; i++) {
+			if (adapter->rx_scrq[i]->irq) {
+				netdev_dbg(netdev,
+					   "Disabling rx_scrq[%d] irq\n", i);
+				disable_scrq_irq(adapter, adapter->rx_scrq[i]);
+				disable_irq(adapter->rx_scrq[i]->irq);
+			}
+		}
+	}
+}
+
+static void ibmvnic_cleanup(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	/* ensure that transmissions are stopped if called by do_reset */
+
+	adapter->tx_queues_active = false;
+
+	/* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active
+	 * update so they don't restart a queue after we stop it below.
+	 */
+	synchronize_rcu();
+
+	if (test_bit(0, &adapter->resetting))
+		netif_tx_disable(netdev);
+	else
+		netif_tx_stop_all_queues(netdev);
+
+	ibmvnic_napi_disable(adapter);
+	ibmvnic_disable_irqs(adapter);
+}
+
+static int __ibmvnic_close(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int rc = 0;
+
+	adapter->state = VNIC_CLOSING;
+	rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
+	adapter->state = VNIC_CLOSED;
+	return rc;
+}
+
+static int ibmvnic_close(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int rc;
+
+	netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n",
+		   adapter_state_to_string(adapter->state),
+		   adapter->failover_pending,
+		   adapter->force_reset_recovery);
+
+	/* If device failover is pending, just set device state and return.
+	 * Device operation will be handled by reset routine.
+	 */
+	if (adapter->failover_pending) {
+		adapter->state = VNIC_CLOSED;
+		return 0;
+	}
+
+	rc = __ibmvnic_close(netdev);
+	ibmvnic_cleanup(netdev);
+	clean_rx_pools(adapter);
+	clean_tx_pools(adapter);
+
+	return rc;
+}
+
+/**
+ * build_hdr_data - creates L2/L3/L4 header data buffer
+ * @hdr_field: bitfield determining needed headers
+ * @skb: socket buffer
+ * @hdr_len: array of header lengths
+ * @hdr_data: buffer to write the header to
+ *
+ * Reads hdr_field to determine which headers are needed by firmware.
+ * Builds a buffer containing these headers.  Saves individual header
+ * lengths and total buffer length to be used to build descriptors.
+ */
+static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
+			  int *hdr_len, u8 *hdr_data)
+{
+	int len = 0;
+	u8 *hdr;
+
+	if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
+		hdr_len[0] = sizeof(struct vlan_ethhdr);
+	else
+		hdr_len[0] = sizeof(struct ethhdr);
+
+	if (skb->protocol == htons(ETH_P_IP)) {
+		hdr_len[1] = ip_hdr(skb)->ihl * 4;
+		if (ip_hdr(skb)->protocol == IPPROTO_TCP)
+			hdr_len[2] = tcp_hdrlen(skb);
+		else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
+			hdr_len[2] = sizeof(struct udphdr);
+	} else if (skb->protocol == htons(ETH_P_IPV6)) {
+		hdr_len[1] = sizeof(struct ipv6hdr);
+		if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
+			hdr_len[2] = tcp_hdrlen(skb);
+		else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
+			hdr_len[2] = sizeof(struct udphdr);
+	} else if (skb->protocol == htons(ETH_P_ARP)) {
+		hdr_len[1] = arp_hdr_len(skb->dev);
+		hdr_len[2] = 0;
+	}
+
+	memset(hdr_data, 0, 120);
+	if ((hdr_field >> 6) & 1) {
+		hdr = skb_mac_header(skb);
+		memcpy(hdr_data, hdr, hdr_len[0]);
+		len += hdr_len[0];
+	}
+
+	if ((hdr_field >> 5) & 1) {
+		hdr = skb_network_header(skb);
+		memcpy(hdr_data + len, hdr, hdr_len[1]);
+		len += hdr_len[1];
+	}
+
+	if ((hdr_field >> 4) & 1) {
+		hdr = skb_transport_header(skb);
+		memcpy(hdr_data + len, hdr, hdr_len[2]);
+		len += hdr_len[2];
+	}
+	return len;
+}
+
+/**
+ * create_hdr_descs - create header and header extension descriptors
+ * @hdr_field: bitfield determining needed headers
+ * @hdr_data: buffer containing header data
+ * @len: length of data buffer
+ * @hdr_len: array of individual header lengths
+ * @scrq_arr: descriptor array
+ *
+ * Creates header and, if needed, header extension descriptors and
+ * places them in a descriptor array, scrq_arr
+ */
+
+static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
+			    union sub_crq *scrq_arr)
+{
+	union sub_crq hdr_desc;
+	int tmp_len = len;
+	int num_descs = 0;
+	u8 *data, *cur;
+	int tmp;
+
+	while (tmp_len > 0) {
+		cur = hdr_data + len - tmp_len;
+
+		memset(&hdr_desc, 0, sizeof(hdr_desc));
+		if (cur != hdr_data) {
+			data = hdr_desc.hdr_ext.data;
+			tmp = tmp_len > 29 ? 29 : tmp_len;
+			hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
+			hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
+			hdr_desc.hdr_ext.len = tmp;
+		} else {
+			data = hdr_desc.hdr.data;
+			tmp = tmp_len > 24 ? 24 : tmp_len;
+			hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
+			hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
+			hdr_desc.hdr.len = tmp;
+			hdr_desc.hdr.l2_len = (u8)hdr_len[0];
+			hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
+			hdr_desc.hdr.l4_len = (u8)hdr_len[2];
+			hdr_desc.hdr.flag = hdr_field << 1;
+		}
+		memcpy(data, cur, tmp);
+		tmp_len -= tmp;
+		*scrq_arr = hdr_desc;
+		scrq_arr++;
+		num_descs++;
+	}
+
+	return num_descs;
+}
+
+/**
+ * build_hdr_descs_arr - build a header descriptor array
+ * @skb: tx socket buffer
+ * @indir_arr: indirect array
+ * @num_entries: number of descriptors to be sent
+ * @hdr_field: bit field determining which headers will be sent
+ *
+ * This function will build a TX descriptor array with applicable
+ * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
+ */
+
+static void build_hdr_descs_arr(struct sk_buff *skb,
+				union sub_crq *indir_arr,
+				int *num_entries, u8 hdr_field)
+{
+	int hdr_len[3] = {0, 0, 0};
+	u8 hdr_data[140] = {0};
+	int tot_len;
+
+	tot_len = build_hdr_data(hdr_field, skb, hdr_len,
+				 hdr_data);
+	*num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
+					 indir_arr + 1);
+}
+
+static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
+				    struct net_device *netdev)
+{
+	/* For some backing devices, mishandling of small packets
+	 * can result in a loss of connection or TX stall. Device
+	 * architects recommend that no packet should be smaller
+	 * than the minimum MTU value provided to the driver, so
+	 * pad any packets to that length
+	 */
+	if (skb->len < netdev->min_mtu)
+		return skb_put_padto(skb, netdev->min_mtu);
+
+	return 0;
+}
+
+static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter,
+					 struct ibmvnic_sub_crq_queue *tx_scrq)
+{
+	struct ibmvnic_ind_xmit_queue *ind_bufp;
+	struct ibmvnic_tx_buff *tx_buff;
+	struct ibmvnic_tx_pool *tx_pool;
+	union sub_crq tx_scrq_entry;
+	int queue_num;
+	int entries;
+	int index;
+	int i;
+
+	ind_bufp = &tx_scrq->ind_buf;
+	entries = (u64)ind_bufp->index;
+	queue_num = tx_scrq->pool_index;
+
+	for (i = entries - 1; i >= 0; --i) {
+		tx_scrq_entry = ind_bufp->indir_arr[i];
+		if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC)
+			continue;
+		index = be32_to_cpu(tx_scrq_entry.v1.correlator);
+		if (index & IBMVNIC_TSO_POOL_MASK) {
+			tx_pool = &adapter->tso_pool[queue_num];
+			index &= ~IBMVNIC_TSO_POOL_MASK;
+		} else {
+			tx_pool = &adapter->tx_pool[queue_num];
+		}
+		tx_pool->free_map[tx_pool->consumer_index] = index;
+		tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
+					  tx_pool->num_buffers - 1 :
+					  tx_pool->consumer_index - 1;
+		tx_buff = &tx_pool->tx_buff[index];
+		adapter->netdev->stats.tx_packets--;
+		adapter->netdev->stats.tx_bytes -= tx_buff->skb->len;
+		adapter->tx_stats_buffers[queue_num].packets--;
+		adapter->tx_stats_buffers[queue_num].bytes -=
+						tx_buff->skb->len;
+		dev_kfree_skb_any(tx_buff->skb);
+		tx_buff->skb = NULL;
+		adapter->netdev->stats.tx_dropped++;
+	}
+
+	ind_bufp->index = 0;
+
+	if (atomic_sub_return(entries, &tx_scrq->used) <=
+	    (adapter->req_tx_entries_per_subcrq / 2) &&
+	    __netif_subqueue_stopped(adapter->netdev, queue_num)) {
+		rcu_read_lock();
+
+		if (adapter->tx_queues_active) {
+			netif_wake_subqueue(adapter->netdev, queue_num);
+			netdev_dbg(adapter->netdev, "Started queue %d\n",
+				   queue_num);
+		}
+
+		rcu_read_unlock();
+	}
+}
+
+static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter,
+				 struct ibmvnic_sub_crq_queue *tx_scrq)
+{
+	struct ibmvnic_ind_xmit_queue *ind_bufp;
+	u64 dma_addr;
+	u64 entries;
+	u64 handle;
+	int rc;
+
+	ind_bufp = &tx_scrq->ind_buf;
+	dma_addr = (u64)ind_bufp->indir_dma;
+	entries = (u64)ind_bufp->index;
+	handle = tx_scrq->handle;
+
+	if (!entries)
+		return 0;
+	rc = send_subcrq_indirect(adapter, handle, dma_addr, entries);
+	if (rc)
+		ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq);
+	else
+		ind_bufp->index = 0;
+	return 0;
+}
+
+static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int queue_num = skb_get_queue_mapping(skb);
+	u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_ind_xmit_queue *ind_bufp;
+	struct ibmvnic_tx_buff *tx_buff = NULL;
+	struct ibmvnic_sub_crq_queue *tx_scrq;
+	struct ibmvnic_long_term_buff *ltb;
+	struct ibmvnic_tx_pool *tx_pool;
+	unsigned int tx_send_failed = 0;
+	netdev_tx_t ret = NETDEV_TX_OK;
+	unsigned int tx_map_failed = 0;
+	union sub_crq indir_arr[16];
+	unsigned int tx_dropped = 0;
+	unsigned int tx_packets = 0;
+	unsigned int tx_bytes = 0;
+	dma_addr_t data_dma_addr;
+	struct netdev_queue *txq;
+	unsigned long lpar_rc;
+	union sub_crq tx_crq;
+	unsigned int offset;
+	int num_entries = 1;
+	unsigned char *dst;
+	int bufidx = 0;
+	u8 proto = 0;
+
+	/* If a reset is in progress, drop the packet since
+	 * the scrqs may get torn down. Otherwise use the
+	 * rcu to ensure reset waits for us to complete.
+	 */
+	rcu_read_lock();
+	if (!adapter->tx_queues_active) {
+		dev_kfree_skb_any(skb);
+
+		tx_send_failed++;
+		tx_dropped++;
+		ret = NETDEV_TX_OK;
+		goto out;
+	}
+
+	tx_scrq = adapter->tx_scrq[queue_num];
+	txq = netdev_get_tx_queue(netdev, queue_num);
+	ind_bufp = &tx_scrq->ind_buf;
+
+	if (ibmvnic_xmit_workarounds(skb, netdev)) {
+		tx_dropped++;
+		tx_send_failed++;
+		ret = NETDEV_TX_OK;
+		ibmvnic_tx_scrq_flush(adapter, tx_scrq);
+		goto out;
+	}
+
+	if (skb_is_gso(skb))
+		tx_pool = &adapter->tso_pool[queue_num];
+	else
+		tx_pool = &adapter->tx_pool[queue_num];
+
+	bufidx = tx_pool->free_map[tx_pool->consumer_index];
+
+	if (bufidx == IBMVNIC_INVALID_MAP) {
+		dev_kfree_skb_any(skb);
+		tx_send_failed++;
+		tx_dropped++;
+		ibmvnic_tx_scrq_flush(adapter, tx_scrq);
+		ret = NETDEV_TX_OK;
+		goto out;
+	}
+
+	tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
+
+	map_txpool_buf_to_ltb(tx_pool, bufidx, &ltb, &offset);
+
+	dst = ltb->buff + offset;
+	memset(dst, 0, tx_pool->buf_size);
+	data_dma_addr = ltb->addr + offset;
+
+	if (skb_shinfo(skb)->nr_frags) {
+		int cur, i;
+
+		/* Copy the head */
+		skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
+		cur = skb_headlen(skb);
+
+		/* Copy the frags */
+		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+			const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
+			memcpy(dst + cur, skb_frag_address(frag),
+			       skb_frag_size(frag));
+			cur += skb_frag_size(frag);
+		}
+	} else {
+		skb_copy_from_linear_data(skb, dst, skb->len);
+	}
+
+	/* post changes to long_term_buff *dst before VIOS accessing it */
+	dma_wmb();
+
+	tx_pool->consumer_index =
+	    (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
+
+	tx_buff = &tx_pool->tx_buff[bufidx];
+	tx_buff->skb = skb;
+	tx_buff->index = bufidx;
+	tx_buff->pool_index = queue_num;
+
+	memset(&tx_crq, 0, sizeof(tx_crq));
+	tx_crq.v1.first = IBMVNIC_CRQ_CMD;
+	tx_crq.v1.type = IBMVNIC_TX_DESC;
+	tx_crq.v1.n_crq_elem = 1;
+	tx_crq.v1.n_sge = 1;
+	tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
+
+	if (skb_is_gso(skb))
+		tx_crq.v1.correlator =
+			cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK);
+	else
+		tx_crq.v1.correlator = cpu_to_be32(bufidx);
+	tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id);
+	tx_crq.v1.sge_len = cpu_to_be32(skb->len);
+	tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
+
+	if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
+		tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
+		tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
+	}
+
+	if (skb->protocol == htons(ETH_P_IP)) {
+		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
+		proto = ip_hdr(skb)->protocol;
+	} else if (skb->protocol == htons(ETH_P_IPV6)) {
+		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
+		proto = ipv6_hdr(skb)->nexthdr;
+	}
+
+	if (proto == IPPROTO_TCP)
+		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
+	else if (proto == IPPROTO_UDP)
+		tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
+
+	if (skb->ip_summed == CHECKSUM_PARTIAL) {
+		tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
+		hdrs += 2;
+	}
+	if (skb_is_gso(skb)) {
+		tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
+		tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
+		hdrs += 2;
+	}
+
+	if ((*hdrs >> 7) & 1)
+		build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs);
+
+	tx_crq.v1.n_crq_elem = num_entries;
+	tx_buff->num_entries = num_entries;
+	/* flush buffer if current entry can not fit */
+	if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) {
+		lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
+		if (lpar_rc != H_SUCCESS)
+			goto tx_flush_err;
+	}
+
+	indir_arr[0] = tx_crq;
+	memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0],
+	       num_entries * sizeof(struct ibmvnic_generic_scrq));
+	ind_bufp->index += num_entries;
+	if (__netdev_tx_sent_queue(txq, skb->len,
+				   netdev_xmit_more() &&
+				   ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) {
+		lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq);
+		if (lpar_rc != H_SUCCESS)
+			goto tx_err;
+	}
+
+	if (atomic_add_return(num_entries, &tx_scrq->used)
+					>= adapter->req_tx_entries_per_subcrq) {
+		netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
+		netif_stop_subqueue(netdev, queue_num);
+	}
+
+	tx_packets++;
+	tx_bytes += skb->len;
+	txq_trans_cond_update(txq);
+	ret = NETDEV_TX_OK;
+	goto out;
+
+tx_flush_err:
+	dev_kfree_skb_any(skb);
+	tx_buff->skb = NULL;
+	tx_pool->consumer_index = tx_pool->consumer_index == 0 ?
+				  tx_pool->num_buffers - 1 :
+				  tx_pool->consumer_index - 1;
+	tx_dropped++;
+tx_err:
+	if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
+		dev_err_ratelimited(dev, "tx: send failed\n");
+
+	if (lpar_rc == H_CLOSED || adapter->failover_pending) {
+		/* Disable TX and report carrier off if queue is closed
+		 * or pending failover.
+		 * Firmware guarantees that a signal will be sent to the
+		 * driver, triggering a reset or some other action.
+		 */
+		netif_tx_stop_all_queues(netdev);
+		netif_carrier_off(netdev);
+	}
+out:
+	rcu_read_unlock();
+	netdev->stats.tx_dropped += tx_dropped;
+	netdev->stats.tx_bytes += tx_bytes;
+	netdev->stats.tx_packets += tx_packets;
+	adapter->tx_send_failed += tx_send_failed;
+	adapter->tx_map_failed += tx_map_failed;
+	adapter->tx_stats_buffers[queue_num].packets += tx_packets;
+	adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
+	adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
+
+	return ret;
+}
+
+static void ibmvnic_set_multi(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct netdev_hw_addr *ha;
+	union ibmvnic_crq crq;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.request_capability.first = IBMVNIC_CRQ_CMD;
+	crq.request_capability.cmd = REQUEST_CAPABILITY;
+
+	if (netdev->flags & IFF_PROMISC) {
+		if (!adapter->promisc_supported)
+			return;
+	} else {
+		if (netdev->flags & IFF_ALLMULTI) {
+			/* Accept all multicast */
+			memset(&crq, 0, sizeof(crq));
+			crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
+			crq.multicast_ctrl.cmd = MULTICAST_CTRL;
+			crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
+			ibmvnic_send_crq(adapter, &crq);
+		} else if (netdev_mc_empty(netdev)) {
+			/* Reject all multicast */
+			memset(&crq, 0, sizeof(crq));
+			crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
+			crq.multicast_ctrl.cmd = MULTICAST_CTRL;
+			crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
+			ibmvnic_send_crq(adapter, &crq);
+		} else {
+			/* Accept one or more multicast(s) */
+			netdev_for_each_mc_addr(ha, netdev) {
+				memset(&crq, 0, sizeof(crq));
+				crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
+				crq.multicast_ctrl.cmd = MULTICAST_CTRL;
+				crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
+				ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
+						ha->addr);
+				ibmvnic_send_crq(adapter, &crq);
+			}
+		}
+	}
+}
+
+static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	union ibmvnic_crq crq;
+	int rc;
+
+	if (!is_valid_ether_addr(dev_addr)) {
+		rc = -EADDRNOTAVAIL;
+		goto err;
+	}
+
+	memset(&crq, 0, sizeof(crq));
+	crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
+	crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
+	ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
+
+	mutex_lock(&adapter->fw_lock);
+	adapter->fw_done_rc = 0;
+	reinit_completion(&adapter->fw_done);
+
+	rc = ibmvnic_send_crq(adapter, &crq);
+	if (rc) {
+		rc = -EIO;
+		mutex_unlock(&adapter->fw_lock);
+		goto err;
+	}
+
+	rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
+	/* netdev->dev_addr is changed in handle_change_mac_rsp function */
+	if (rc || adapter->fw_done_rc) {
+		rc = -EIO;
+		mutex_unlock(&adapter->fw_lock);
+		goto err;
+	}
+	mutex_unlock(&adapter->fw_lock);
+	return 0;
+err:
+	ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
+	return rc;
+}
+
+static int ibmvnic_set_mac(struct net_device *netdev, void *p)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct sockaddr *addr = p;
+	int rc;
+
+	rc = 0;
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	ether_addr_copy(adapter->mac_addr, addr->sa_data);
+	if (adapter->state != VNIC_PROBED)
+		rc = __ibmvnic_set_mac(netdev, addr->sa_data);
+
+	return rc;
+}
+
+static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason)
+{
+	switch (reason) {
+	case VNIC_RESET_FAILOVER:
+		return "FAILOVER";
+	case VNIC_RESET_MOBILITY:
+		return "MOBILITY";
+	case VNIC_RESET_FATAL:
+		return "FATAL";
+	case VNIC_RESET_NON_FATAL:
+		return "NON_FATAL";
+	case VNIC_RESET_TIMEOUT:
+		return "TIMEOUT";
+	case VNIC_RESET_CHANGE_PARAM:
+		return "CHANGE_PARAM";
+	case VNIC_RESET_PASSIVE_INIT:
+		return "PASSIVE_INIT";
+	}
+	return "UNKNOWN";
+}
+
+/*
+ * Initialize the init_done completion and return code values. We
+ * can get a transport event just after registering the CRQ and the
+ * tasklet will use this to communicate the transport event. To ensure
+ * we don't miss the notification/error, initialize these _before_
+ * regisering the CRQ.
+ */
+static inline void reinit_init_done(struct ibmvnic_adapter *adapter)
+{
+	reinit_completion(&adapter->init_done);
+	adapter->init_done_rc = 0;
+}
+
+/*
+ * do_reset returns zero if we are able to keep processing reset events, or
+ * non-zero if we hit a fatal error and must halt.
+ */
+static int do_reset(struct ibmvnic_adapter *adapter,
+		    struct ibmvnic_rwi *rwi, u32 reset_state)
+{
+	struct net_device *netdev = adapter->netdev;
+	u64 old_num_rx_queues, old_num_tx_queues;
+	u64 old_num_rx_slots, old_num_tx_slots;
+	int rc;
+
+	netdev_dbg(adapter->netdev,
+		   "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n",
+		   adapter_state_to_string(adapter->state),
+		   adapter->failover_pending,
+		   reset_reason_to_string(rwi->reset_reason),
+		   adapter_state_to_string(reset_state));
+
+	adapter->reset_reason = rwi->reset_reason;
+	/* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */
+	if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
+		rtnl_lock();
+
+	/* Now that we have the rtnl lock, clear any pending failover.
+	 * This will ensure ibmvnic_open() has either completed or will
+	 * block until failover is complete.
+	 */
+	if (rwi->reset_reason == VNIC_RESET_FAILOVER)
+		adapter->failover_pending = false;
+
+	/* read the state and check (again) after getting rtnl */
+	reset_state = adapter->state;
+
+	if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
+		rc = -EBUSY;
+		goto out;
+	}
+
+	netif_carrier_off(netdev);
+
+	old_num_rx_queues = adapter->req_rx_queues;
+	old_num_tx_queues = adapter->req_tx_queues;
+	old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
+	old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
+
+	ibmvnic_cleanup(netdev);
+
+	if (reset_state == VNIC_OPEN &&
+	    adapter->reset_reason != VNIC_RESET_MOBILITY &&
+	    adapter->reset_reason != VNIC_RESET_FAILOVER) {
+		if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
+			rc = __ibmvnic_close(netdev);
+			if (rc)
+				goto out;
+		} else {
+			adapter->state = VNIC_CLOSING;
+
+			/* Release the RTNL lock before link state change and
+			 * re-acquire after the link state change to allow
+			 * linkwatch_event to grab the RTNL lock and run during
+			 * a reset.
+			 */
+			rtnl_unlock();
+			rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
+			rtnl_lock();
+			if (rc)
+				goto out;
+
+			if (adapter->state == VNIC_OPEN) {
+				/* When we dropped rtnl, ibmvnic_open() got
+				 * it and noticed that we are resetting and
+				 * set the adapter state to OPEN. Update our
+				 * new "target" state, and resume the reset
+				 * from VNIC_CLOSING state.
+				 */
+				netdev_dbg(netdev,
+					   "Open changed state from %s, updating.\n",
+					   adapter_state_to_string(reset_state));
+				reset_state = VNIC_OPEN;
+				adapter->state = VNIC_CLOSING;
+			}
+
+			if (adapter->state != VNIC_CLOSING) {
+				/* If someone else changed the adapter state
+				 * when we dropped the rtnl, fail the reset
+				 */
+				rc = -EAGAIN;
+				goto out;
+			}
+			adapter->state = VNIC_CLOSED;
+		}
+	}
+
+	if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
+		release_resources(adapter);
+		release_sub_crqs(adapter, 1);
+		release_crq_queue(adapter);
+	}
+
+	if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
+		/* remove the closed state so when we call open it appears
+		 * we are coming from the probed state.
+		 */
+		adapter->state = VNIC_PROBED;
+
+		reinit_init_done(adapter);
+
+		if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
+			rc = init_crq_queue(adapter);
+		} else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
+			rc = ibmvnic_reenable_crq_queue(adapter);
+			release_sub_crqs(adapter, 1);
+		} else {
+			rc = ibmvnic_reset_crq(adapter);
+			if (rc == H_CLOSED || rc == H_SUCCESS) {
+				rc = vio_enable_interrupts(adapter->vdev);
+				if (rc)
+					netdev_err(adapter->netdev,
+						   "Reset failed to enable interrupts. rc=%d\n",
+						   rc);
+			}
+		}
+
+		if (rc) {
+			netdev_err(adapter->netdev,
+				   "Reset couldn't initialize crq. rc=%d\n", rc);
+			goto out;
+		}
+
+		rc = ibmvnic_reset_init(adapter, true);
+		if (rc)
+			goto out;
+
+		/* If the adapter was in PROBE or DOWN state prior to the reset,
+		 * exit here.
+		 */
+		if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) {
+			rc = 0;
+			goto out;
+		}
+
+		rc = ibmvnic_login(netdev);
+		if (rc)
+			goto out;
+
+		if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) {
+			rc = init_resources(adapter);
+			if (rc)
+				goto out;
+		} else if (adapter->req_rx_queues != old_num_rx_queues ||
+		    adapter->req_tx_queues != old_num_tx_queues ||
+		    adapter->req_rx_add_entries_per_subcrq !=
+		    old_num_rx_slots ||
+		    adapter->req_tx_entries_per_subcrq !=
+		    old_num_tx_slots ||
+		    !adapter->rx_pool ||
+		    !adapter->tso_pool ||
+		    !adapter->tx_pool) {
+			release_napi(adapter);
+			release_vpd_data(adapter);
+
+			rc = init_resources(adapter);
+			if (rc)
+				goto out;
+
+		} else {
+			rc = init_tx_pools(netdev);
+			if (rc) {
+				netdev_dbg(netdev,
+					   "init tx pools failed (%d)\n",
+					   rc);
+				goto out;
+			}
+
+			rc = init_rx_pools(netdev);
+			if (rc) {
+				netdev_dbg(netdev,
+					   "init rx pools failed (%d)\n",
+					   rc);
+				goto out;
+			}
+		}
+		ibmvnic_disable_irqs(adapter);
+	}
+	adapter->state = VNIC_CLOSED;
+
+	if (reset_state == VNIC_CLOSED) {
+		rc = 0;
+		goto out;
+	}
+
+	rc = __ibmvnic_open(netdev);
+	if (rc) {
+		rc = IBMVNIC_OPEN_FAILED;
+		goto out;
+	}
+
+	/* refresh device's multicast list */
+	ibmvnic_set_multi(netdev);
+
+	if (adapter->reset_reason == VNIC_RESET_FAILOVER ||
+	    adapter->reset_reason == VNIC_RESET_MOBILITY)
+		__netdev_notify_peers(netdev);
+
+	rc = 0;
+
+out:
+	/* restore the adapter state if reset failed */
+	if (rc)
+		adapter->state = reset_state;
+	/* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */
+	if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM))
+		rtnl_unlock();
+
+	netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n",
+		   adapter_state_to_string(adapter->state),
+		   adapter->failover_pending, rc);
+	return rc;
+}
+
+static int do_hard_reset(struct ibmvnic_adapter *adapter,
+			 struct ibmvnic_rwi *rwi, u32 reset_state)
+{
+	struct net_device *netdev = adapter->netdev;
+	int rc;
+
+	netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n",
+		   reset_reason_to_string(rwi->reset_reason));
+
+	/* read the state and check (again) after getting rtnl */
+	reset_state = adapter->state;
+
+	if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) {
+		rc = -EBUSY;
+		goto out;
+	}
+
+	netif_carrier_off(netdev);
+	adapter->reset_reason = rwi->reset_reason;
+
+	ibmvnic_cleanup(netdev);
+	release_resources(adapter);
+	release_sub_crqs(adapter, 0);
+	release_crq_queue(adapter);
+
+	/* remove the closed state so when we call open it appears
+	 * we are coming from the probed state.
+	 */
+	adapter->state = VNIC_PROBED;
+
+	reinit_init_done(adapter);
+
+	rc = init_crq_queue(adapter);
+	if (rc) {
+		netdev_err(adapter->netdev,
+			   "Couldn't initialize crq. rc=%d\n", rc);
+		goto out;
+	}
+
+	rc = ibmvnic_reset_init(adapter, false);
+	if (rc)
+		goto out;
+
+	/* If the adapter was in PROBE or DOWN state prior to the reset,
+	 * exit here.
+	 */
+	if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN)
+		goto out;
+
+	rc = ibmvnic_login(netdev);
+	if (rc)
+		goto out;
+
+	rc = init_resources(adapter);
+	if (rc)
+		goto out;
+
+	ibmvnic_disable_irqs(adapter);
+	adapter->state = VNIC_CLOSED;
+
+	if (reset_state == VNIC_CLOSED)
+		goto out;
+
+	rc = __ibmvnic_open(netdev);
+	if (rc) {
+		rc = IBMVNIC_OPEN_FAILED;
+		goto out;
+	}
+
+	__netdev_notify_peers(netdev);
+out:
+	/* restore adapter state if reset failed */
+	if (rc)
+		adapter->state = reset_state;
+	netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n",
+		   adapter_state_to_string(adapter->state),
+		   adapter->failover_pending, rc);
+	return rc;
+}
+
+static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_rwi *rwi;
+	unsigned long flags;
+
+	spin_lock_irqsave(&adapter->rwi_lock, flags);
+
+	if (!list_empty(&adapter->rwi_list)) {
+		rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
+				       list);
+		list_del(&rwi->list);
+	} else {
+		rwi = NULL;
+	}
+
+	spin_unlock_irqrestore(&adapter->rwi_lock, flags);
+	return rwi;
+}
+
+/**
+ * do_passive_init - complete probing when partner device is detected.
+ * @adapter: ibmvnic_adapter struct
+ *
+ * If the ibmvnic device does not have a partner device to communicate with at boot
+ * and that partner device comes online at a later time, this function is called
+ * to complete the initialization process of ibmvnic device.
+ * Caller is expected to hold rtnl_lock().
+ *
+ * Returns non-zero if sub-CRQs are not initialized properly leaving the device
+ * in the down state.
+ * Returns 0 upon success and the device is in PROBED state.
+ */
+
+static int do_passive_init(struct ibmvnic_adapter *adapter)
+{
+	unsigned long timeout = msecs_to_jiffies(30000);
+	struct net_device *netdev = adapter->netdev;
+	struct device *dev = &adapter->vdev->dev;
+	int rc;
+
+	netdev_dbg(netdev, "Partner device found, probing.\n");
+
+	adapter->state = VNIC_PROBING;
+	reinit_completion(&adapter->init_done);
+	adapter->init_done_rc = 0;
+	adapter->crq.active = true;
+
+	rc = send_crq_init_complete(adapter);
+	if (rc)
+		goto out;
+
+	rc = send_version_xchg(adapter);
+	if (rc)
+		netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc);
+
+	if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
+		dev_err(dev, "Initialization sequence timed out\n");
+		rc = -ETIMEDOUT;
+		goto out;
+	}
+
+	rc = init_sub_crqs(adapter);
+	if (rc) {
+		dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc);
+		goto out;
+	}
+
+	rc = init_sub_crq_irqs(adapter);
+	if (rc) {
+		dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc);
+		goto init_failed;
+	}
+
+	netdev->mtu = adapter->req_mtu - ETH_HLEN;
+	netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
+	netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
+
+	adapter->state = VNIC_PROBED;
+	netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n");
+
+	return 0;
+
+init_failed:
+	release_sub_crqs(adapter, 1);
+out:
+	adapter->state = VNIC_DOWN;
+	return rc;
+}
+
+static void __ibmvnic_reset(struct work_struct *work)
+{
+	struct ibmvnic_adapter *adapter;
+	unsigned int timeout = 5000;
+	struct ibmvnic_rwi *tmprwi;
+	bool saved_state = false;
+	struct ibmvnic_rwi *rwi;
+	unsigned long flags;
+	struct device *dev;
+	bool need_reset;
+	int num_fails = 0;
+	u32 reset_state;
+	int rc = 0;
+
+	adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
+		dev = &adapter->vdev->dev;
+
+	/* Wait for ibmvnic_probe() to complete. If probe is taking too long
+	 * or if another reset is in progress, defer work for now. If probe
+	 * eventually fails it will flush and terminate our work.
+	 *
+	 * Three possibilities here:
+	 * 1. Adpater being removed  - just return
+	 * 2. Timed out on probe or another reset in progress - delay the work
+	 * 3. Completed probe - perform any resets in queue
+	 */
+	if (adapter->state == VNIC_PROBING &&
+	    !wait_for_completion_timeout(&adapter->probe_done, timeout)) {
+		dev_err(dev, "Reset thread timed out on probe");
+		queue_delayed_work(system_long_wq,
+				   &adapter->ibmvnic_delayed_reset,
+				   IBMVNIC_RESET_DELAY);
+		return;
+	}
+
+	/* adapter is done with probe (i.e state is never VNIC_PROBING now) */
+	if (adapter->state == VNIC_REMOVING)
+		return;
+
+	/* ->rwi_list is stable now (no one else is removing entries) */
+
+	/* ibmvnic_probe() may have purged the reset queue after we were
+	 * scheduled to process a reset so there maybe no resets to process.
+	 * Before setting the ->resetting bit though, we have to make sure
+	 * that there is infact a reset to process. Otherwise we may race
+	 * with ibmvnic_open() and end up leaving the vnic down:
+	 *
+	 *	__ibmvnic_reset()	    ibmvnic_open()
+	 *	-----------------	    --------------
+	 *
+	 *  set ->resetting bit
+	 *  				find ->resetting bit is set
+	 *  				set ->state to IBMVNIC_OPEN (i.e
+	 *  				assume reset will open device)
+	 *  				return
+	 *  find reset queue empty
+	 *  return
+	 *
+	 *  	Neither performed vnic login/open and vnic stays down
+	 *
+	 * If we hold the lock and conditionally set the bit, either we
+	 * or ibmvnic_open() will complete the open.
+	 */
+	need_reset = false;
+	spin_lock(&adapter->rwi_lock);
+	if (!list_empty(&adapter->rwi_list)) {
+		if (test_and_set_bit_lock(0, &adapter->resetting)) {
+			queue_delayed_work(system_long_wq,
+					   &adapter->ibmvnic_delayed_reset,
+					   IBMVNIC_RESET_DELAY);
+		} else {
+			need_reset = true;
+		}
+	}
+	spin_unlock(&adapter->rwi_lock);
+
+	if (!need_reset)
+		return;
+
+	rwi = get_next_rwi(adapter);
+	while (rwi) {
+		spin_lock_irqsave(&adapter->state_lock, flags);
+
+		if (adapter->state == VNIC_REMOVING ||
+		    adapter->state == VNIC_REMOVED) {
+			spin_unlock_irqrestore(&adapter->state_lock, flags);
+			kfree(rwi);
+			rc = EBUSY;
+			break;
+		}
+
+		if (!saved_state) {
+			reset_state = adapter->state;
+			saved_state = true;
+		}
+		spin_unlock_irqrestore(&adapter->state_lock, flags);
+
+		if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) {
+			rtnl_lock();
+			rc = do_passive_init(adapter);
+			rtnl_unlock();
+			if (!rc)
+				netif_carrier_on(adapter->netdev);
+		} else if (adapter->force_reset_recovery) {
+			/* Since we are doing a hard reset now, clear the
+			 * failover_pending flag so we don't ignore any
+			 * future MOBILITY or other resets.
+			 */
+			adapter->failover_pending = false;
+
+			/* Transport event occurred during previous reset */
+			if (adapter->wait_for_reset) {
+				/* Previous was CHANGE_PARAM; caller locked */
+				adapter->force_reset_recovery = false;
+				rc = do_hard_reset(adapter, rwi, reset_state);
+			} else {
+				rtnl_lock();
+				adapter->force_reset_recovery = false;
+				rc = do_hard_reset(adapter, rwi, reset_state);
+				rtnl_unlock();
+			}
+			if (rc)
+				num_fails++;
+			else
+				num_fails = 0;
+
+			/* If auto-priority-failover is enabled we can get
+			 * back to back failovers during resets, resulting
+			 * in at least two failed resets (from high-priority
+			 * backing device to low-priority one and then back)
+			 * If resets continue to fail beyond that, give the
+			 * adapter some time to settle down before retrying.
+			 */
+			if (num_fails >= 3) {
+				netdev_dbg(adapter->netdev,
+					   "[S:%s] Hard reset failed %d times, waiting 60 secs\n",
+					   adapter_state_to_string(adapter->state),
+					   num_fails);
+				set_current_state(TASK_UNINTERRUPTIBLE);
+				schedule_timeout(60 * HZ);
+			}
+		} else {
+			rc = do_reset(adapter, rwi, reset_state);
+		}
+		tmprwi = rwi;
+		adapter->last_reset_time = jiffies;
+
+		if (rc)
+			netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc);
+
+		rwi = get_next_rwi(adapter);
+
+		/*
+		 * If there are no resets queued and the previous reset failed,
+		 * the adapter would be in an undefined state. So retry the
+		 * previous reset as a hard reset.
+		 *
+		 * Else, free the previous rwi and, if there is another reset
+		 * queued, process the new reset even if previous reset failed
+		 * (the previous reset could have failed because of a fail
+		 * over for instance, so process the fail over).
+		 */
+		if (!rwi && rc)
+			rwi = tmprwi;
+		else
+			kfree(tmprwi);
+
+		if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
+			    rwi->reset_reason == VNIC_RESET_MOBILITY || rc))
+			adapter->force_reset_recovery = true;
+	}
+
+	if (adapter->wait_for_reset) {
+		adapter->reset_done_rc = rc;
+		complete(&adapter->reset_done);
+	}
+
+	clear_bit_unlock(0, &adapter->resetting);
+
+	netdev_dbg(adapter->netdev,
+		   "[S:%s FRR:%d WFR:%d] Done processing resets\n",
+		   adapter_state_to_string(adapter->state),
+		   adapter->force_reset_recovery,
+		   adapter->wait_for_reset);
+}
+
+static void __ibmvnic_delayed_reset(struct work_struct *work)
+{
+	struct ibmvnic_adapter *adapter;
+
+	adapter = container_of(work, struct ibmvnic_adapter,
+			       ibmvnic_delayed_reset.work);
+	__ibmvnic_reset(&adapter->ibmvnic_reset);
+}
+
+static void flush_reset_queue(struct ibmvnic_adapter *adapter)
+{
+	struct list_head *entry, *tmp_entry;
+
+	if (!list_empty(&adapter->rwi_list)) {
+		list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) {
+			list_del(entry);
+			kfree(list_entry(entry, struct ibmvnic_rwi, list));
+		}
+	}
+}
+
+static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
+			 enum ibmvnic_reset_reason reason)
+{
+	struct net_device *netdev = adapter->netdev;
+	struct ibmvnic_rwi *rwi, *tmp;
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&adapter->rwi_lock, flags);
+
+	/* If failover is pending don't schedule any other reset.
+	 * Instead let the failover complete. If there is already a
+	 * a failover reset scheduled, we will detect and drop the
+	 * duplicate reset when walking the ->rwi_list below.
+	 */
+	if (adapter->state == VNIC_REMOVING ||
+	    adapter->state == VNIC_REMOVED ||
+	    (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) {
+		ret = EBUSY;
+		netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
+		goto err;
+	}
+
+	list_for_each_entry(tmp, &adapter->rwi_list, list) {
+		if (tmp->reset_reason == reason) {
+			netdev_dbg(netdev, "Skipping matching reset, reason=%s\n",
+				   reset_reason_to_string(reason));
+			ret = EBUSY;
+			goto err;
+		}
+	}
+
+	rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
+	if (!rwi) {
+		ret = ENOMEM;
+		goto err;
+	}
+	/* if we just received a transport event,
+	 * flush reset queue and process this reset
+	 */
+	if (adapter->force_reset_recovery)
+		flush_reset_queue(adapter);
+
+	rwi->reset_reason = reason;
+	list_add_tail(&rwi->list, &adapter->rwi_list);
+	netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n",
+		   reset_reason_to_string(reason));
+	queue_work(system_long_wq, &adapter->ibmvnic_reset);
+
+	ret = 0;
+err:
+	/* ibmvnic_close() below can block, so drop the lock first */
+	spin_unlock_irqrestore(&adapter->rwi_lock, flags);
+
+	if (ret == ENOMEM)
+		ibmvnic_close(netdev);
+
+	return -ret;
+}
+
+static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(dev);
+
+	if (test_bit(0, &adapter->resetting)) {
+		netdev_err(adapter->netdev,
+			   "Adapter is resetting, skip timeout reset\n");
+		return;
+	}
+	/* No queuing up reset until at least 5 seconds (default watchdog val)
+	 * after last reset
+	 */
+	if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) {
+		netdev_dbg(dev, "Not yet time to tx timeout.\n");
+		return;
+	}
+	ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
+}
+
+static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
+				  struct ibmvnic_rx_buff *rx_buff)
+{
+	struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
+
+	rx_buff->skb = NULL;
+
+	pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
+	pool->next_alloc = (pool->next_alloc + 1) % pool->size;
+
+	atomic_dec(&pool->available);
+}
+
+static int ibmvnic_poll(struct napi_struct *napi, int budget)
+{
+	struct ibmvnic_sub_crq_queue *rx_scrq;
+	struct ibmvnic_adapter *adapter;
+	struct net_device *netdev;
+	int frames_processed;
+	int scrq_num;
+
+	netdev = napi->dev;
+	adapter = netdev_priv(netdev);
+	scrq_num = (int)(napi - adapter->napi);
+	frames_processed = 0;
+	rx_scrq = adapter->rx_scrq[scrq_num];
+
+restart_poll:
+	while (frames_processed < budget) {
+		struct sk_buff *skb;
+		struct ibmvnic_rx_buff *rx_buff;
+		union sub_crq *next;
+		u32 length;
+		u16 offset;
+		u8 flags = 0;
+
+		if (unlikely(test_bit(0, &adapter->resetting) &&
+			     adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
+			enable_scrq_irq(adapter, rx_scrq);
+			napi_complete_done(napi, frames_processed);
+			return frames_processed;
+		}
+
+		if (!pending_scrq(adapter, rx_scrq))
+			break;
+		next = ibmvnic_next_scrq(adapter, rx_scrq);
+		rx_buff = (struct ibmvnic_rx_buff *)
+			  be64_to_cpu(next->rx_comp.correlator);
+		/* do error checking */
+		if (next->rx_comp.rc) {
+			netdev_dbg(netdev, "rx buffer returned with rc %x\n",
+				   be16_to_cpu(next->rx_comp.rc));
+			/* free the entry */
+			next->rx_comp.first = 0;
+			dev_kfree_skb_any(rx_buff->skb);
+			remove_buff_from_pool(adapter, rx_buff);
+			continue;
+		} else if (!rx_buff->skb) {
+			/* free the entry */
+			next->rx_comp.first = 0;
+			remove_buff_from_pool(adapter, rx_buff);
+			continue;
+		}
+
+		length = be32_to_cpu(next->rx_comp.len);
+		offset = be16_to_cpu(next->rx_comp.off_frame_data);
+		flags = next->rx_comp.flags;
+		skb = rx_buff->skb;
+		/* load long_term_buff before copying to skb */
+		dma_rmb();
+		skb_copy_to_linear_data(skb, rx_buff->data + offset,
+					length);
+
+		/* VLAN Header has been stripped by the system firmware and
+		 * needs to be inserted by the driver
+		 */
+		if (adapter->rx_vlan_header_insertion &&
+		    (flags & IBMVNIC_VLAN_STRIPPED))
+			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+					       ntohs(next->rx_comp.vlan_tci));
+
+		/* free the entry */
+		next->rx_comp.first = 0;
+		remove_buff_from_pool(adapter, rx_buff);
+
+		skb_put(skb, length);
+		skb->protocol = eth_type_trans(skb, netdev);
+		skb_record_rx_queue(skb, scrq_num);
+
+		if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
+		    flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+		}
+
+		length = skb->len;
+		napi_gro_receive(napi, skb); /* send it up */
+		netdev->stats.rx_packets++;
+		netdev->stats.rx_bytes += length;
+		adapter->rx_stats_buffers[scrq_num].packets++;
+		adapter->rx_stats_buffers[scrq_num].bytes += length;
+		frames_processed++;
+	}
+
+	if (adapter->state != VNIC_CLOSING &&
+	    ((atomic_read(&adapter->rx_pool[scrq_num].available) <
+	      adapter->req_rx_add_entries_per_subcrq / 2) ||
+	      frames_processed < budget))
+		replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
+	if (frames_processed < budget) {
+		if (napi_complete_done(napi, frames_processed)) {
+			enable_scrq_irq(adapter, rx_scrq);
+			if (pending_scrq(adapter, rx_scrq)) {
+				if (napi_reschedule(napi)) {
+					disable_scrq_irq(adapter, rx_scrq);
+					goto restart_poll;
+				}
+			}
+		}
+	}
+	return frames_processed;
+}
+
+static int wait_for_reset(struct ibmvnic_adapter *adapter)
+{
+	int rc, ret;
+
+	adapter->fallback.mtu = adapter->req_mtu;
+	adapter->fallback.rx_queues = adapter->req_rx_queues;
+	adapter->fallback.tx_queues = adapter->req_tx_queues;
+	adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
+	adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
+
+	reinit_completion(&adapter->reset_done);
+	adapter->wait_for_reset = true;
+	rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
+
+	if (rc) {
+		ret = rc;
+		goto out;
+	}
+	rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
+	if (rc) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	ret = 0;
+	if (adapter->reset_done_rc) {
+		ret = -EIO;
+		adapter->desired.mtu = adapter->fallback.mtu;
+		adapter->desired.rx_queues = adapter->fallback.rx_queues;
+		adapter->desired.tx_queues = adapter->fallback.tx_queues;
+		adapter->desired.rx_entries = adapter->fallback.rx_entries;
+		adapter->desired.tx_entries = adapter->fallback.tx_entries;
+
+		reinit_completion(&adapter->reset_done);
+		adapter->wait_for_reset = true;
+		rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
+		if (rc) {
+			ret = rc;
+			goto out;
+		}
+		rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
+						 60000);
+		if (rc) {
+			ret = -ENODEV;
+			goto out;
+		}
+	}
+out:
+	adapter->wait_for_reset = false;
+
+	return ret;
+}
+
+static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	adapter->desired.mtu = new_mtu + ETH_HLEN;
+
+	return wait_for_reset(adapter);
+}
+
+static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
+						struct net_device *dev,
+						netdev_features_t features)
+{
+	/* Some backing hardware adapters can not
+	 * handle packets with a MSS less than 224
+	 * or with only one segment.
+	 */
+	if (skb_is_gso(skb)) {
+		if (skb_shinfo(skb)->gso_size < 224 ||
+		    skb_shinfo(skb)->gso_segs == 1)
+			features &= ~NETIF_F_GSO_MASK;
+	}
+
+	return features;
+}
+
+static const struct net_device_ops ibmvnic_netdev_ops = {
+	.ndo_open		= ibmvnic_open,
+	.ndo_stop		= ibmvnic_close,
+	.ndo_start_xmit		= ibmvnic_xmit,
+	.ndo_set_rx_mode	= ibmvnic_set_multi,
+	.ndo_set_mac_address	= ibmvnic_set_mac,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_tx_timeout		= ibmvnic_tx_timeout,
+	.ndo_change_mtu		= ibmvnic_change_mtu,
+	.ndo_features_check     = ibmvnic_features_check,
+};
+
+/* ethtool functions */
+
+static int ibmvnic_get_link_ksettings(struct net_device *netdev,
+				      struct ethtool_link_ksettings *cmd)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int rc;
+
+	rc = send_query_phys_parms(adapter);
+	if (rc) {
+		adapter->speed = SPEED_UNKNOWN;
+		adapter->duplex = DUPLEX_UNKNOWN;
+	}
+	cmd->base.speed = adapter->speed;
+	cmd->base.duplex = adapter->duplex;
+	cmd->base.port = PORT_FIBRE;
+	cmd->base.phy_address = 0;
+	cmd->base.autoneg = AUTONEG_ENABLE;
+
+	return 0;
+}
+
+static void ibmvnic_get_drvinfo(struct net_device *netdev,
+				struct ethtool_drvinfo *info)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
+	strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
+	strscpy(info->fw_version, adapter->fw_version,
+		sizeof(info->fw_version));
+}
+
+static u32 ibmvnic_get_msglevel(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	return adapter->msg_enable;
+}
+
+static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	adapter->msg_enable = data;
+}
+
+static u32 ibmvnic_get_link(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	/* Don't need to send a query because we request a logical link up at
+	 * init and then we wait for link state indications
+	 */
+	return adapter->logical_link_state;
+}
+
+static void ibmvnic_get_ringparam(struct net_device *netdev,
+				  struct ethtool_ringparam *ring,
+				  struct kernel_ethtool_ringparam *kernel_ring,
+				  struct netlink_ext_ack *extack)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
+	ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
+	ring->rx_mini_max_pending = 0;
+	ring->rx_jumbo_max_pending = 0;
+	ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
+	ring->tx_pending = adapter->req_tx_entries_per_subcrq;
+	ring->rx_mini_pending = 0;
+	ring->rx_jumbo_pending = 0;
+}
+
+static int ibmvnic_set_ringparam(struct net_device *netdev,
+				 struct ethtool_ringparam *ring,
+				 struct kernel_ethtool_ringparam *kernel_ring,
+				 struct netlink_ext_ack *extack)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq  ||
+	    ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
+		netdev_err(netdev, "Invalid request.\n");
+		netdev_err(netdev, "Max tx buffers = %llu\n",
+			   adapter->max_rx_add_entries_per_subcrq);
+		netdev_err(netdev, "Max rx buffers = %llu\n",
+			   adapter->max_tx_entries_per_subcrq);
+		return -EINVAL;
+	}
+
+	adapter->desired.rx_entries = ring->rx_pending;
+	adapter->desired.tx_entries = ring->tx_pending;
+
+	return wait_for_reset(adapter);
+}
+
+static void ibmvnic_get_channels(struct net_device *netdev,
+				 struct ethtool_channels *channels)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	channels->max_rx = adapter->max_rx_queues;
+	channels->max_tx = adapter->max_tx_queues;
+	channels->max_other = 0;
+	channels->max_combined = 0;
+	channels->rx_count = adapter->req_rx_queues;
+	channels->tx_count = adapter->req_tx_queues;
+	channels->other_count = 0;
+	channels->combined_count = 0;
+}
+
+static int ibmvnic_set_channels(struct net_device *netdev,
+				struct ethtool_channels *channels)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	adapter->desired.rx_queues = channels->rx_count;
+	adapter->desired.tx_queues = channels->tx_count;
+
+	return wait_for_reset(adapter);
+}
+
+static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(dev);
+	int i;
+
+	if (stringset != ETH_SS_STATS)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
+		memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
+
+	for (i = 0; i < adapter->req_tx_queues; i++) {
+		snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
+		data += ETH_GSTRING_LEN;
+
+		snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
+		data += ETH_GSTRING_LEN;
+
+		snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
+		data += ETH_GSTRING_LEN;
+	}
+
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
+		data += ETH_GSTRING_LEN;
+
+		snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
+		data += ETH_GSTRING_LEN;
+
+		snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
+		data += ETH_GSTRING_LEN;
+	}
+}
+
+static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(dev);
+
+	switch (sset) {
+	case ETH_SS_STATS:
+		return ARRAY_SIZE(ibmvnic_stats) +
+		       adapter->req_tx_queues * NUM_TX_STATS +
+		       adapter->req_rx_queues * NUM_RX_STATS;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void ibmvnic_get_ethtool_stats(struct net_device *dev,
+				      struct ethtool_stats *stats, u64 *data)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(dev);
+	union ibmvnic_crq crq;
+	int i, j;
+	int rc;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.request_statistics.first = IBMVNIC_CRQ_CMD;
+	crq.request_statistics.cmd = REQUEST_STATISTICS;
+	crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
+	crq.request_statistics.len =
+	    cpu_to_be32(sizeof(struct ibmvnic_statistics));
+
+	/* Wait for data to be written */
+	reinit_completion(&adapter->stats_done);
+	rc = ibmvnic_send_crq(adapter, &crq);
+	if (rc)
+		return;
+	rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
+	if (rc)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
+		data[i] = be64_to_cpu(IBMVNIC_GET_STAT
+				      (adapter, ibmvnic_stats[i].offset));
+
+	for (j = 0; j < adapter->req_tx_queues; j++) {
+		data[i] = adapter->tx_stats_buffers[j].packets;
+		i++;
+		data[i] = adapter->tx_stats_buffers[j].bytes;
+		i++;
+		data[i] = adapter->tx_stats_buffers[j].dropped_packets;
+		i++;
+	}
+
+	for (j = 0; j < adapter->req_rx_queues; j++) {
+		data[i] = adapter->rx_stats_buffers[j].packets;
+		i++;
+		data[i] = adapter->rx_stats_buffers[j].bytes;
+		i++;
+		data[i] = adapter->rx_stats_buffers[j].interrupts;
+		i++;
+	}
+}
+
+static const struct ethtool_ops ibmvnic_ethtool_ops = {
+	.get_drvinfo		= ibmvnic_get_drvinfo,
+	.get_msglevel		= ibmvnic_get_msglevel,
+	.set_msglevel		= ibmvnic_set_msglevel,
+	.get_link		= ibmvnic_get_link,
+	.get_ringparam		= ibmvnic_get_ringparam,
+	.set_ringparam		= ibmvnic_set_ringparam,
+	.get_channels		= ibmvnic_get_channels,
+	.set_channels		= ibmvnic_set_channels,
+	.get_strings            = ibmvnic_get_strings,
+	.get_sset_count         = ibmvnic_get_sset_count,
+	.get_ethtool_stats	= ibmvnic_get_ethtool_stats,
+	.get_link_ksettings	= ibmvnic_get_link_ksettings,
+};
+
+/* Routines for managing CRQs/sCRQs  */
+
+static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
+				   struct ibmvnic_sub_crq_queue *scrq)
+{
+	int rc;
+
+	if (!scrq) {
+		netdev_dbg(adapter->netdev, "Invalid scrq reset.\n");
+		return -EINVAL;
+	}
+
+	if (scrq->irq) {
+		free_irq(scrq->irq, scrq);
+		irq_dispose_mapping(scrq->irq);
+		scrq->irq = 0;
+	}
+
+	if (scrq->msgs) {
+		memset(scrq->msgs, 0, 4 * PAGE_SIZE);
+		atomic_set(&scrq->used, 0);
+		scrq->cur = 0;
+		scrq->ind_buf.index = 0;
+	} else {
+		netdev_dbg(adapter->netdev, "Invalid scrq reset\n");
+		return -EINVAL;
+	}
+
+	rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
+			   4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
+	return rc;
+}
+
+static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
+{
+	int i, rc;
+
+	if (!adapter->tx_scrq || !adapter->rx_scrq)
+		return -EINVAL;
+
+	ibmvnic_clean_affinity(adapter);
+
+	for (i = 0; i < adapter->req_tx_queues; i++) {
+		netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
+		rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
+		if (rc)
+			return rc;
+	}
+
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
+		rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
+		if (rc)
+			return rc;
+	}
+
+	return rc;
+}
+
+static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
+				  struct ibmvnic_sub_crq_queue *scrq,
+				  bool do_h_free)
+{
+	struct device *dev = &adapter->vdev->dev;
+	long rc;
+
+	netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
+
+	if (do_h_free) {
+		/* Close the sub-crqs */
+		do {
+			rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
+						adapter->vdev->unit_address,
+						scrq->crq_num);
+		} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+		if (rc) {
+			netdev_err(adapter->netdev,
+				   "Failed to release sub-CRQ %16lx, rc = %ld\n",
+				   scrq->crq_num, rc);
+		}
+	}
+
+	dma_free_coherent(dev,
+			  IBMVNIC_IND_ARR_SZ,
+			  scrq->ind_buf.indir_arr,
+			  scrq->ind_buf.indir_dma);
+
+	dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
+			 DMA_BIDIRECTIONAL);
+	free_pages((unsigned long)scrq->msgs, 2);
+	free_cpumask_var(scrq->affinity_mask);
+	kfree(scrq);
+}
+
+static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
+							*adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_sub_crq_queue *scrq;
+	int rc;
+
+	scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
+	if (!scrq)
+		return NULL;
+
+	scrq->msgs =
+		(union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
+	if (!scrq->msgs) {
+		dev_warn(dev, "Couldn't allocate crq queue messages page\n");
+		goto zero_page_failed;
+	}
+	if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL))
+		goto cpumask_alloc_failed;
+
+	scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
+					 DMA_BIDIRECTIONAL);
+	if (dma_mapping_error(dev, scrq->msg_token)) {
+		dev_warn(dev, "Couldn't map crq queue messages page\n");
+		goto map_failed;
+	}
+
+	rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
+			   4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
+
+	if (rc == H_RESOURCE)
+		rc = ibmvnic_reset_crq(adapter);
+
+	if (rc == H_CLOSED) {
+		dev_warn(dev, "Partner adapter not ready, waiting.\n");
+	} else if (rc) {
+		dev_warn(dev, "Error %d registering sub-crq\n", rc);
+		goto reg_failed;
+	}
+
+	scrq->adapter = adapter;
+	scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
+	scrq->ind_buf.index = 0;
+
+	scrq->ind_buf.indir_arr =
+		dma_alloc_coherent(dev,
+				   IBMVNIC_IND_ARR_SZ,
+				   &scrq->ind_buf.indir_dma,
+				   GFP_KERNEL);
+
+	if (!scrq->ind_buf.indir_arr)
+		goto indir_failed;
+
+	spin_lock_init(&scrq->lock);
+
+	netdev_dbg(adapter->netdev,
+		   "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
+		   scrq->crq_num, scrq->hw_irq, scrq->irq);
+
+	return scrq;
+
+indir_failed:
+	do {
+		rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
+					adapter->vdev->unit_address,
+					scrq->crq_num);
+	} while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc));
+reg_failed:
+	dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
+			 DMA_BIDIRECTIONAL);
+map_failed:
+	free_cpumask_var(scrq->affinity_mask);
+cpumask_alloc_failed:
+	free_pages((unsigned long)scrq->msgs, 2);
+zero_page_failed:
+	kfree(scrq);
+
+	return NULL;
+}
+
+static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
+{
+	int i;
+
+	ibmvnic_clean_affinity(adapter);
+	if (adapter->tx_scrq) {
+		for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
+			if (!adapter->tx_scrq[i])
+				continue;
+
+			netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
+				   i);
+			ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]);
+			if (adapter->tx_scrq[i]->irq) {
+				free_irq(adapter->tx_scrq[i]->irq,
+					 adapter->tx_scrq[i]);
+				irq_dispose_mapping(adapter->tx_scrq[i]->irq);
+				adapter->tx_scrq[i]->irq = 0;
+			}
+
+			release_sub_crq_queue(adapter, adapter->tx_scrq[i],
+					      do_h_free);
+		}
+
+		kfree(adapter->tx_scrq);
+		adapter->tx_scrq = NULL;
+		adapter->num_active_tx_scrqs = 0;
+	}
+
+	if (adapter->rx_scrq) {
+		for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
+			if (!adapter->rx_scrq[i])
+				continue;
+
+			netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
+				   i);
+			if (adapter->rx_scrq[i]->irq) {
+				free_irq(adapter->rx_scrq[i]->irq,
+					 adapter->rx_scrq[i]);
+				irq_dispose_mapping(adapter->rx_scrq[i]->irq);
+				adapter->rx_scrq[i]->irq = 0;
+			}
+
+			release_sub_crq_queue(adapter, adapter->rx_scrq[i],
+					      do_h_free);
+		}
+
+		kfree(adapter->rx_scrq);
+		adapter->rx_scrq = NULL;
+		adapter->num_active_rx_scrqs = 0;
+	}
+}
+
+static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
+			    struct ibmvnic_sub_crq_queue *scrq)
+{
+	struct device *dev = &adapter->vdev->dev;
+	unsigned long rc;
+
+	rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
+				H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
+	if (rc)
+		dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
+			scrq->hw_irq, rc);
+	return rc;
+}
+
+/* We can not use the IRQ chip EOI handler because that has the
+ * unintended effect of changing the interrupt priority.
+ */
+static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq)
+{
+	u64 val = 0xff000000 | scrq->hw_irq;
+	unsigned long rc;
+
+	rc = plpar_hcall_norets(H_EOI, val);
+	if (rc)
+		dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc);
+}
+
+/* Due to a firmware bug, the hypervisor can send an interrupt to a
+ * transmit or receive queue just prior to a partition migration.
+ * Force an EOI after migration.
+ */
+static void ibmvnic_clear_pending_interrupt(struct device *dev,
+					    struct ibmvnic_sub_crq_queue *scrq)
+{
+	if (!xive_enabled())
+		ibmvnic_xics_eoi(dev, scrq);
+}
+
+static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
+			   struct ibmvnic_sub_crq_queue *scrq)
+{
+	struct device *dev = &adapter->vdev->dev;
+	unsigned long rc;
+
+	if (scrq->hw_irq > 0x100000000ULL) {
+		dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
+		return 1;
+	}
+
+	if (test_bit(0, &adapter->resetting) &&
+	    adapter->reset_reason == VNIC_RESET_MOBILITY) {
+		ibmvnic_clear_pending_interrupt(dev, scrq);
+	}
+
+	rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
+				H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
+	if (rc)
+		dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
+			scrq->hw_irq, rc);
+	return rc;
+}
+
+static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
+			       struct ibmvnic_sub_crq_queue *scrq)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_tx_pool *tx_pool;
+	struct ibmvnic_tx_buff *txbuff;
+	struct netdev_queue *txq;
+	union sub_crq *next;
+	int index;
+	int i;
+
+restart_loop:
+	while (pending_scrq(adapter, scrq)) {
+		unsigned int pool = scrq->pool_index;
+		int num_entries = 0;
+		int total_bytes = 0;
+		int num_packets = 0;
+
+		next = ibmvnic_next_scrq(adapter, scrq);
+		for (i = 0; i < next->tx_comp.num_comps; i++) {
+			index = be32_to_cpu(next->tx_comp.correlators[i]);
+			if (index & IBMVNIC_TSO_POOL_MASK) {
+				tx_pool = &adapter->tso_pool[pool];
+				index &= ~IBMVNIC_TSO_POOL_MASK;
+			} else {
+				tx_pool = &adapter->tx_pool[pool];
+			}
+
+			txbuff = &tx_pool->tx_buff[index];
+			num_packets++;
+			num_entries += txbuff->num_entries;
+			if (txbuff->skb) {
+				total_bytes += txbuff->skb->len;
+				if (next->tx_comp.rcs[i]) {
+					dev_err(dev, "tx error %x\n",
+						next->tx_comp.rcs[i]);
+					dev_kfree_skb_irq(txbuff->skb);
+				} else {
+					dev_consume_skb_irq(txbuff->skb);
+				}
+				txbuff->skb = NULL;
+			} else {
+				netdev_warn(adapter->netdev,
+					    "TX completion received with NULL socket buffer\n");
+			}
+			tx_pool->free_map[tx_pool->producer_index] = index;
+			tx_pool->producer_index =
+				(tx_pool->producer_index + 1) %
+					tx_pool->num_buffers;
+		}
+		/* remove tx_comp scrq*/
+		next->tx_comp.first = 0;
+
+		txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index);
+		netdev_tx_completed_queue(txq, num_packets, total_bytes);
+
+		if (atomic_sub_return(num_entries, &scrq->used) <=
+		    (adapter->req_tx_entries_per_subcrq / 2) &&
+		    __netif_subqueue_stopped(adapter->netdev,
+					     scrq->pool_index)) {
+			rcu_read_lock();
+			if (adapter->tx_queues_active) {
+				netif_wake_subqueue(adapter->netdev,
+						    scrq->pool_index);
+				netdev_dbg(adapter->netdev,
+					   "Started queue %d\n",
+					   scrq->pool_index);
+			}
+			rcu_read_unlock();
+		}
+	}
+
+	enable_scrq_irq(adapter, scrq);
+
+	if (pending_scrq(adapter, scrq)) {
+		disable_scrq_irq(adapter, scrq);
+		goto restart_loop;
+	}
+
+	return 0;
+}
+
+static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
+{
+	struct ibmvnic_sub_crq_queue *scrq = instance;
+	struct ibmvnic_adapter *adapter = scrq->adapter;
+
+	disable_scrq_irq(adapter, scrq);
+	ibmvnic_complete_tx(adapter, scrq);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
+{
+	struct ibmvnic_sub_crq_queue *scrq = instance;
+	struct ibmvnic_adapter *adapter = scrq->adapter;
+
+	/* When booting a kdump kernel we can hit pending interrupts
+	 * prior to completing driver initialization.
+	 */
+	if (unlikely(adapter->state != VNIC_OPEN))
+		return IRQ_NONE;
+
+	adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
+
+	if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
+		disable_scrq_irq(adapter, scrq);
+		__napi_schedule(&adapter->napi[scrq->scrq_num]);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_sub_crq_queue *scrq;
+	int i = 0, j = 0;
+	int rc = 0;
+
+	for (i = 0; i < adapter->req_tx_queues; i++) {
+		netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
+			   i);
+		scrq = adapter->tx_scrq[i];
+		scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
+
+		if (!scrq->irq) {
+			rc = -EINVAL;
+			dev_err(dev, "Error mapping irq\n");
+			goto req_tx_irq_failed;
+		}
+
+		snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
+			 adapter->vdev->unit_address, i);
+		rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
+				 0, scrq->name, scrq);
+
+		if (rc) {
+			dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
+				scrq->irq, rc);
+			irq_dispose_mapping(scrq->irq);
+			goto req_tx_irq_failed;
+		}
+	}
+
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
+			   i);
+		scrq = adapter->rx_scrq[i];
+		scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
+		if (!scrq->irq) {
+			rc = -EINVAL;
+			dev_err(dev, "Error mapping irq\n");
+			goto req_rx_irq_failed;
+		}
+		snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
+			 adapter->vdev->unit_address, i);
+		rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
+				 0, scrq->name, scrq);
+		if (rc) {
+			dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
+				scrq->irq, rc);
+			irq_dispose_mapping(scrq->irq);
+			goto req_rx_irq_failed;
+		}
+	}
+
+	cpus_read_lock();
+	ibmvnic_set_affinity(adapter);
+	cpus_read_unlock();
+
+	return rc;
+
+req_rx_irq_failed:
+	for (j = 0; j < i; j++) {
+		free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
+		irq_dispose_mapping(adapter->rx_scrq[j]->irq);
+	}
+	i = adapter->req_tx_queues;
+req_tx_irq_failed:
+	for (j = 0; j < i; j++) {
+		free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
+		irq_dispose_mapping(adapter->tx_scrq[j]->irq);
+	}
+	release_sub_crqs(adapter, 1);
+	return rc;
+}
+
+static int init_sub_crqs(struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_sub_crq_queue **allqueues;
+	int registered_queues = 0;
+	int total_queues;
+	int more = 0;
+	int i;
+
+	total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
+
+	allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
+	if (!allqueues)
+		return -ENOMEM;
+
+	for (i = 0; i < total_queues; i++) {
+		allqueues[i] = init_sub_crq_queue(adapter);
+		if (!allqueues[i]) {
+			dev_warn(dev, "Couldn't allocate all sub-crqs\n");
+			break;
+		}
+		registered_queues++;
+	}
+
+	/* Make sure we were able to register the minimum number of queues */
+	if (registered_queues <
+	    adapter->min_tx_queues + adapter->min_rx_queues) {
+		dev_err(dev, "Fatal: Couldn't init  min number of sub-crqs\n");
+		goto tx_failed;
+	}
+
+	/* Distribute the failed allocated queues*/
+	for (i = 0; i < total_queues - registered_queues + more ; i++) {
+		netdev_dbg(adapter->netdev, "Reducing number of queues\n");
+		switch (i % 3) {
+		case 0:
+			if (adapter->req_rx_queues > adapter->min_rx_queues)
+				adapter->req_rx_queues--;
+			else
+				more++;
+			break;
+		case 1:
+			if (adapter->req_tx_queues > adapter->min_tx_queues)
+				adapter->req_tx_queues--;
+			else
+				more++;
+			break;
+		}
+	}
+
+	adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
+				   sizeof(*adapter->tx_scrq), GFP_KERNEL);
+	if (!adapter->tx_scrq)
+		goto tx_failed;
+
+	for (i = 0; i < adapter->req_tx_queues; i++) {
+		adapter->tx_scrq[i] = allqueues[i];
+		adapter->tx_scrq[i]->pool_index = i;
+		adapter->num_active_tx_scrqs++;
+	}
+
+	adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
+				   sizeof(*adapter->rx_scrq), GFP_KERNEL);
+	if (!adapter->rx_scrq)
+		goto rx_failed;
+
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
+		adapter->rx_scrq[i]->scrq_num = i;
+		adapter->num_active_rx_scrqs++;
+	}
+
+	kfree(allqueues);
+	return 0;
+
+rx_failed:
+	kfree(adapter->tx_scrq);
+	adapter->tx_scrq = NULL;
+tx_failed:
+	for (i = 0; i < registered_queues; i++)
+		release_sub_crq_queue(adapter, allqueues[i], 1);
+	kfree(allqueues);
+	return -ENOMEM;
+}
+
+static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
+{
+	struct device *dev = &adapter->vdev->dev;
+	union ibmvnic_crq crq;
+	int max_entries;
+	int cap_reqs;
+
+	/* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on
+	 * the PROMISC flag). Initialize this count upfront. When the tasklet
+	 * receives a response to all of these, it will send the next protocol
+	 * message (QUERY_IP_OFFLOAD).
+	 */
+	if (!(adapter->netdev->flags & IFF_PROMISC) ||
+	    adapter->promisc_supported)
+		cap_reqs = 7;
+	else
+		cap_reqs = 6;
+
+	if (!retry) {
+		/* Sub-CRQ entries are 32 byte long */
+		int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
+
+		atomic_set(&adapter->running_cap_crqs, cap_reqs);
+
+		if (adapter->min_tx_entries_per_subcrq > entries_page ||
+		    adapter->min_rx_add_entries_per_subcrq > entries_page) {
+			dev_err(dev, "Fatal, invalid entries per sub-crq\n");
+			return;
+		}
+
+		if (adapter->desired.mtu)
+			adapter->req_mtu = adapter->desired.mtu;
+		else
+			adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
+
+		if (!adapter->desired.tx_entries)
+			adapter->desired.tx_entries =
+					adapter->max_tx_entries_per_subcrq;
+		if (!adapter->desired.rx_entries)
+			adapter->desired.rx_entries =
+					adapter->max_rx_add_entries_per_subcrq;
+
+		max_entries = IBMVNIC_LTB_SET_SIZE /
+			      (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
+
+		if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
+			adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) {
+			adapter->desired.tx_entries = max_entries;
+		}
+
+		if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
+			adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) {
+			adapter->desired.rx_entries = max_entries;
+		}
+
+		if (adapter->desired.tx_entries)
+			adapter->req_tx_entries_per_subcrq =
+					adapter->desired.tx_entries;
+		else
+			adapter->req_tx_entries_per_subcrq =
+					adapter->max_tx_entries_per_subcrq;
+
+		if (adapter->desired.rx_entries)
+			adapter->req_rx_add_entries_per_subcrq =
+					adapter->desired.rx_entries;
+		else
+			adapter->req_rx_add_entries_per_subcrq =
+					adapter->max_rx_add_entries_per_subcrq;
+
+		if (adapter->desired.tx_queues)
+			adapter->req_tx_queues =
+					adapter->desired.tx_queues;
+		else
+			adapter->req_tx_queues =
+					adapter->opt_tx_comp_sub_queues;
+
+		if (adapter->desired.rx_queues)
+			adapter->req_rx_queues =
+					adapter->desired.rx_queues;
+		else
+			adapter->req_rx_queues =
+					adapter->opt_rx_comp_queues;
+
+		adapter->req_rx_add_queues = adapter->max_rx_add_queues;
+	} else {
+		atomic_add(cap_reqs, &adapter->running_cap_crqs);
+	}
+	memset(&crq, 0, sizeof(crq));
+	crq.request_capability.first = IBMVNIC_CRQ_CMD;
+	crq.request_capability.cmd = REQUEST_CAPABILITY;
+
+	crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
+	crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
+	cap_reqs--;
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
+	crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
+	cap_reqs--;
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
+	crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
+	cap_reqs--;
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability =
+	    cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
+	crq.request_capability.number =
+	    cpu_to_be64(adapter->req_tx_entries_per_subcrq);
+	cap_reqs--;
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability =
+	    cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
+	crq.request_capability.number =
+	    cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
+	cap_reqs--;
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability = cpu_to_be16(REQ_MTU);
+	crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
+	cap_reqs--;
+	ibmvnic_send_crq(adapter, &crq);
+
+	if (adapter->netdev->flags & IFF_PROMISC) {
+		if (adapter->promisc_supported) {
+			crq.request_capability.capability =
+			    cpu_to_be16(PROMISC_REQUESTED);
+			crq.request_capability.number = cpu_to_be64(1);
+			cap_reqs--;
+			ibmvnic_send_crq(adapter, &crq);
+		}
+	} else {
+		crq.request_capability.capability =
+		    cpu_to_be16(PROMISC_REQUESTED);
+		crq.request_capability.number = cpu_to_be64(0);
+		cap_reqs--;
+		ibmvnic_send_crq(adapter, &crq);
+	}
+
+	/* Keep at end to catch any discrepancy between expected and actual
+	 * CRQs sent.
+	 */
+	WARN_ON(cap_reqs != 0);
+}
+
+static int pending_scrq(struct ibmvnic_adapter *adapter,
+			struct ibmvnic_sub_crq_queue *scrq)
+{
+	union sub_crq *entry = &scrq->msgs[scrq->cur];
+	int rc;
+
+	rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP);
+
+	/* Ensure that the SCRQ valid flag is loaded prior to loading the
+	 * contents of the SCRQ descriptor
+	 */
+	dma_rmb();
+
+	return rc;
+}
+
+static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
+					struct ibmvnic_sub_crq_queue *scrq)
+{
+	union sub_crq *entry;
+	unsigned long flags;
+
+	spin_lock_irqsave(&scrq->lock, flags);
+	entry = &scrq->msgs[scrq->cur];
+	if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
+		if (++scrq->cur == scrq->size)
+			scrq->cur = 0;
+	} else {
+		entry = NULL;
+	}
+	spin_unlock_irqrestore(&scrq->lock, flags);
+
+	/* Ensure that the SCRQ valid flag is loaded prior to loading the
+	 * contents of the SCRQ descriptor
+	 */
+	dma_rmb();
+
+	return entry;
+}
+
+static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_crq_queue *queue = &adapter->crq;
+	union ibmvnic_crq *crq;
+
+	crq = &queue->msgs[queue->cur];
+	if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
+		if (++queue->cur == queue->size)
+			queue->cur = 0;
+	} else {
+		crq = NULL;
+	}
+
+	return crq;
+}
+
+static void print_subcrq_error(struct device *dev, int rc, const char *func)
+{
+	switch (rc) {
+	case H_PARAMETER:
+		dev_warn_ratelimited(dev,
+				     "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
+				     func, rc);
+		break;
+	case H_CLOSED:
+		dev_warn_ratelimited(dev,
+				     "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
+				     func, rc);
+		break;
+	default:
+		dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
+		break;
+	}
+}
+
+static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
+				u64 remote_handle, u64 ioba, u64 num_entries)
+{
+	unsigned int ua = adapter->vdev->unit_address;
+	struct device *dev = &adapter->vdev->dev;
+	int rc;
+
+	/* Make sure the hypervisor sees the complete request */
+	dma_wmb();
+	rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
+				cpu_to_be64(remote_handle),
+				ioba, num_entries);
+
+	if (rc)
+		print_subcrq_error(dev, rc, __func__);
+
+	return rc;
+}
+
+static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
+			    union ibmvnic_crq *crq)
+{
+	unsigned int ua = adapter->vdev->unit_address;
+	struct device *dev = &adapter->vdev->dev;
+	u64 *u64_crq = (u64 *)crq;
+	int rc;
+
+	netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
+		   (unsigned long)cpu_to_be64(u64_crq[0]),
+		   (unsigned long)cpu_to_be64(u64_crq[1]));
+
+	if (!adapter->crq.active &&
+	    crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
+		dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
+		return -EINVAL;
+	}
+
+	/* Make sure the hypervisor sees the complete request */
+	dma_wmb();
+
+	rc = plpar_hcall_norets(H_SEND_CRQ, ua,
+				cpu_to_be64(u64_crq[0]),
+				cpu_to_be64(u64_crq[1]));
+
+	if (rc) {
+		if (rc == H_CLOSED) {
+			dev_warn(dev, "CRQ Queue closed\n");
+			/* do not reset, report the fail, wait for passive init from server */
+		}
+
+		dev_warn(dev, "Send error (rc=%d)\n", rc);
+	}
+
+	return rc;
+}
+
+static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	union ibmvnic_crq crq;
+	int retries = 100;
+	int rc;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
+	crq.generic.cmd = IBMVNIC_CRQ_INIT;
+	netdev_dbg(adapter->netdev, "Sending CRQ init\n");
+
+	do {
+		rc = ibmvnic_send_crq(adapter, &crq);
+		if (rc != H_CLOSED)
+			break;
+		retries--;
+		msleep(50);
+
+	} while (retries > 0);
+
+	if (rc) {
+		dev_err(dev, "Failed to send init request, rc = %d\n", rc);
+		return rc;
+	}
+
+	return 0;
+}
+
+struct vnic_login_client_data {
+	u8	type;
+	__be16	len;
+	char	name[];
+} __packed;
+
+static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
+{
+	int len;
+
+	/* Calculate the amount of buffer space needed for the
+	 * vnic client data in the login buffer. There are four entries,
+	 * OS name, LPAR name, device name, and a null last entry.
+	 */
+	len = 4 * sizeof(struct vnic_login_client_data);
+	len += 6; /* "Linux" plus NULL */
+	len += strlen(utsname()->nodename) + 1;
+	len += strlen(adapter->netdev->name) + 1;
+
+	return len;
+}
+
+static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
+				 struct vnic_login_client_data *vlcd)
+{
+	const char *os_name = "Linux";
+	int len;
+
+	/* Type 1 - LPAR OS */
+	vlcd->type = 1;
+	len = strlen(os_name) + 1;
+	vlcd->len = cpu_to_be16(len);
+	strscpy(vlcd->name, os_name, len);
+	vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
+
+	/* Type 2 - LPAR name */
+	vlcd->type = 2;
+	len = strlen(utsname()->nodename) + 1;
+	vlcd->len = cpu_to_be16(len);
+	strscpy(vlcd->name, utsname()->nodename, len);
+	vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
+
+	/* Type 3 - device name */
+	vlcd->type = 3;
+	len = strlen(adapter->netdev->name) + 1;
+	vlcd->len = cpu_to_be16(len);
+	strscpy(vlcd->name, adapter->netdev->name, len);
+}
+
+static int send_login(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
+	struct ibmvnic_login_buffer *login_buffer;
+	struct device *dev = &adapter->vdev->dev;
+	struct vnic_login_client_data *vlcd;
+	dma_addr_t rsp_buffer_token;
+	dma_addr_t buffer_token;
+	size_t rsp_buffer_size;
+	union ibmvnic_crq crq;
+	int client_data_len;
+	size_t buffer_size;
+	__be64 *tx_list_p;
+	__be64 *rx_list_p;
+	int rc;
+	int i;
+
+	if (!adapter->tx_scrq || !adapter->rx_scrq) {
+		netdev_err(adapter->netdev,
+			   "RX or TX queues are not allocated, device login failed\n");
+		return -ENOMEM;
+	}
+
+	release_login_buffer(adapter);
+	release_login_rsp_buffer(adapter);
+
+	client_data_len = vnic_client_data_len(adapter);
+
+	buffer_size =
+	    sizeof(struct ibmvnic_login_buffer) +
+	    sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
+	    client_data_len;
+
+	login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
+	if (!login_buffer)
+		goto buf_alloc_failed;
+
+	buffer_token = dma_map_single(dev, login_buffer, buffer_size,
+				      DMA_TO_DEVICE);
+	if (dma_mapping_error(dev, buffer_token)) {
+		dev_err(dev, "Couldn't map login buffer\n");
+		goto buf_map_failed;
+	}
+
+	rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
+			  sizeof(u64) * adapter->req_tx_queues +
+			  sizeof(u64) * adapter->req_rx_queues +
+			  sizeof(u64) * adapter->req_rx_queues +
+			  sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
+
+	login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
+	if (!login_rsp_buffer)
+		goto buf_rsp_alloc_failed;
+
+	rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
+					  rsp_buffer_size, DMA_FROM_DEVICE);
+	if (dma_mapping_error(dev, rsp_buffer_token)) {
+		dev_err(dev, "Couldn't map login rsp buffer\n");
+		goto buf_rsp_map_failed;
+	}
+
+	adapter->login_buf = login_buffer;
+	adapter->login_buf_token = buffer_token;
+	adapter->login_buf_sz = buffer_size;
+	adapter->login_rsp_buf = login_rsp_buffer;
+	adapter->login_rsp_buf_token = rsp_buffer_token;
+	adapter->login_rsp_buf_sz = rsp_buffer_size;
+
+	login_buffer->len = cpu_to_be32(buffer_size);
+	login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
+	login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
+	login_buffer->off_txcomp_subcrqs =
+	    cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
+	login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
+	login_buffer->off_rxcomp_subcrqs =
+	    cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
+			sizeof(u64) * adapter->req_tx_queues);
+	login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
+	login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
+
+	tx_list_p = (__be64 *)((char *)login_buffer +
+				      sizeof(struct ibmvnic_login_buffer));
+	rx_list_p = (__be64 *)((char *)login_buffer +
+				      sizeof(struct ibmvnic_login_buffer) +
+				      sizeof(u64) * adapter->req_tx_queues);
+
+	for (i = 0; i < adapter->req_tx_queues; i++) {
+		if (adapter->tx_scrq[i]) {
+			tx_list_p[i] =
+				cpu_to_be64(adapter->tx_scrq[i]->crq_num);
+		}
+	}
+
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		if (adapter->rx_scrq[i]) {
+			rx_list_p[i] =
+				cpu_to_be64(adapter->rx_scrq[i]->crq_num);
+		}
+	}
+
+	/* Insert vNIC login client data */
+	vlcd = (struct vnic_login_client_data *)
+		((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
+	login_buffer->client_data_offset =
+			cpu_to_be32((char *)vlcd - (char *)login_buffer);
+	login_buffer->client_data_len = cpu_to_be32(client_data_len);
+
+	vnic_add_client_data(adapter, vlcd);
+
+	netdev_dbg(adapter->netdev, "Login Buffer:\n");
+	for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
+		netdev_dbg(adapter->netdev, "%016lx\n",
+			   ((unsigned long *)(adapter->login_buf))[i]);
+	}
+
+	memset(&crq, 0, sizeof(crq));
+	crq.login.first = IBMVNIC_CRQ_CMD;
+	crq.login.cmd = LOGIN;
+	crq.login.ioba = cpu_to_be32(buffer_token);
+	crq.login.len = cpu_to_be32(buffer_size);
+
+	adapter->login_pending = true;
+	rc = ibmvnic_send_crq(adapter, &crq);
+	if (rc) {
+		adapter->login_pending = false;
+		netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc);
+		goto buf_send_failed;
+	}
+
+	return 0;
+
+buf_send_failed:
+	dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
+			 DMA_FROM_DEVICE);
+buf_rsp_map_failed:
+	kfree(login_rsp_buffer);
+	adapter->login_rsp_buf = NULL;
+buf_rsp_alloc_failed:
+	dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
+buf_map_failed:
+	kfree(login_buffer);
+	adapter->login_buf = NULL;
+buf_alloc_failed:
+	return -ENOMEM;
+}
+
+static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
+			    u32 len, u8 map_id)
+{
+	union ibmvnic_crq crq;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.request_map.first = IBMVNIC_CRQ_CMD;
+	crq.request_map.cmd = REQUEST_MAP;
+	crq.request_map.map_id = map_id;
+	crq.request_map.ioba = cpu_to_be32(addr);
+	crq.request_map.len = cpu_to_be32(len);
+	return ibmvnic_send_crq(adapter, &crq);
+}
+
+static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
+{
+	union ibmvnic_crq crq;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.request_unmap.first = IBMVNIC_CRQ_CMD;
+	crq.request_unmap.cmd = REQUEST_UNMAP;
+	crq.request_unmap.map_id = map_id;
+	return ibmvnic_send_crq(adapter, &crq);
+}
+
+static void send_query_map(struct ibmvnic_adapter *adapter)
+{
+	union ibmvnic_crq crq;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.query_map.first = IBMVNIC_CRQ_CMD;
+	crq.query_map.cmd = QUERY_MAP;
+	ibmvnic_send_crq(adapter, &crq);
+}
+
+/* Send a series of CRQs requesting various capabilities of the VNIC server */
+static void send_query_cap(struct ibmvnic_adapter *adapter)
+{
+	union ibmvnic_crq crq;
+	int cap_reqs;
+
+	/* We send out 25 QUERY_CAPABILITY CRQs below.  Initialize this count
+	 * upfront. When the tasklet receives a response to all of these, it
+	 * can send out the next protocol messaage (REQUEST_CAPABILITY).
+	 */
+	cap_reqs = 25;
+
+	atomic_set(&adapter->running_cap_crqs, cap_reqs);
+
+	memset(&crq, 0, sizeof(crq));
+	crq.query_capability.first = IBMVNIC_CRQ_CMD;
+	crq.query_capability.cmd = QUERY_CAPABILITY;
+
+	crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability =
+	    cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability =
+	    cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability =
+	    cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability =
+	    cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MIN_MTU);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MAX_MTU);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability =
+			cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability =
+			cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability =
+			cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
+
+	ibmvnic_send_crq(adapter, &crq);
+	cap_reqs--;
+
+	/* Keep at end to catch any discrepancy between expected and actual
+	 * CRQs sent.
+	 */
+	WARN_ON(cap_reqs != 0);
+}
+
+static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
+{
+	int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
+	struct device *dev = &adapter->vdev->dev;
+	union ibmvnic_crq crq;
+
+	adapter->ip_offload_tok =
+		dma_map_single(dev,
+			       &adapter->ip_offload_buf,
+			       buf_sz,
+			       DMA_FROM_DEVICE);
+
+	if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
+		if (!firmware_has_feature(FW_FEATURE_CMO))
+			dev_err(dev, "Couldn't map offload buffer\n");
+		return;
+	}
+
+	memset(&crq, 0, sizeof(crq));
+	crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
+	crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
+	crq.query_ip_offload.len = cpu_to_be32(buf_sz);
+	crq.query_ip_offload.ioba =
+	    cpu_to_be32(adapter->ip_offload_tok);
+
+	ibmvnic_send_crq(adapter, &crq);
+}
+
+static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
+	struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
+	struct device *dev = &adapter->vdev->dev;
+	netdev_features_t old_hw_features = 0;
+	union ibmvnic_crq crq;
+
+	adapter->ip_offload_ctrl_tok =
+		dma_map_single(dev,
+			       ctrl_buf,
+			       sizeof(adapter->ip_offload_ctrl),
+			       DMA_TO_DEVICE);
+
+	if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
+		dev_err(dev, "Couldn't map ip offload control buffer\n");
+		return;
+	}
+
+	ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
+	ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
+	ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
+	ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
+	ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
+	ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
+	ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
+	ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
+	ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
+	ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
+
+	/* large_rx disabled for now, additional features needed */
+	ctrl_buf->large_rx_ipv4 = 0;
+	ctrl_buf->large_rx_ipv6 = 0;
+
+	if (adapter->state != VNIC_PROBING) {
+		old_hw_features = adapter->netdev->hw_features;
+		adapter->netdev->hw_features = 0;
+	}
+
+	adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
+
+	if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
+		adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
+
+	if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
+		adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
+
+	if ((adapter->netdev->features &
+	    (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
+		adapter->netdev->hw_features |= NETIF_F_RXCSUM;
+
+	if (buf->large_tx_ipv4)
+		adapter->netdev->hw_features |= NETIF_F_TSO;
+	if (buf->large_tx_ipv6)
+		adapter->netdev->hw_features |= NETIF_F_TSO6;
+
+	if (adapter->state == VNIC_PROBING) {
+		adapter->netdev->features |= adapter->netdev->hw_features;
+	} else if (old_hw_features != adapter->netdev->hw_features) {
+		netdev_features_t tmp = 0;
+
+		/* disable features no longer supported */
+		adapter->netdev->features &= adapter->netdev->hw_features;
+		/* turn on features now supported if previously enabled */
+		tmp = (old_hw_features ^ adapter->netdev->hw_features) &
+			adapter->netdev->hw_features;
+		adapter->netdev->features |=
+				tmp & adapter->netdev->wanted_features;
+	}
+
+	memset(&crq, 0, sizeof(crq));
+	crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
+	crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
+	crq.control_ip_offload.len =
+	    cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
+	crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
+	ibmvnic_send_crq(adapter, &crq);
+}
+
+static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
+				struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+
+	if (crq->get_vpd_size_rsp.rc.code) {
+		dev_err(dev, "Error retrieving VPD size, rc=%x\n",
+			crq->get_vpd_size_rsp.rc.code);
+		complete(&adapter->fw_done);
+		return;
+	}
+
+	adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
+	complete(&adapter->fw_done);
+}
+
+static void handle_vpd_rsp(union ibmvnic_crq *crq,
+			   struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	unsigned char *substr = NULL;
+	u8 fw_level_len = 0;
+
+	memset(adapter->fw_version, 0, 32);
+
+	dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
+			 DMA_FROM_DEVICE);
+
+	if (crq->get_vpd_rsp.rc.code) {
+		dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
+			crq->get_vpd_rsp.rc.code);
+		goto complete;
+	}
+
+	/* get the position of the firmware version info
+	 * located after the ASCII 'RM' substring in the buffer
+	 */
+	substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
+	if (!substr) {
+		dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
+		goto complete;
+	}
+
+	/* get length of firmware level ASCII substring */
+	if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
+		fw_level_len = *(substr + 2);
+	} else {
+		dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
+		goto complete;
+	}
+
+	/* copy firmware version string from vpd into adapter */
+	if ((substr + 3 + fw_level_len) <
+	    (adapter->vpd->buff + adapter->vpd->len)) {
+		strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
+	} else {
+		dev_info(dev, "FW substr extrapolated VPD buff\n");
+	}
+
+complete:
+	if (adapter->fw_version[0] == '\0')
+		strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version));
+	complete(&adapter->fw_done);
+}
+
+static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
+	int i;
+
+	dma_unmap_single(dev, adapter->ip_offload_tok,
+			 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
+
+	netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
+	for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
+		netdev_dbg(adapter->netdev, "%016lx\n",
+			   ((unsigned long *)(buf))[i]);
+
+	netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
+	netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
+	netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
+		   buf->tcp_ipv4_chksum);
+	netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
+		   buf->tcp_ipv6_chksum);
+	netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
+		   buf->udp_ipv4_chksum);
+	netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
+		   buf->udp_ipv6_chksum);
+	netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
+		   buf->large_tx_ipv4);
+	netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
+		   buf->large_tx_ipv6);
+	netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
+		   buf->large_rx_ipv4);
+	netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
+		   buf->large_rx_ipv6);
+	netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
+		   buf->max_ipv4_header_size);
+	netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
+		   buf->max_ipv6_header_size);
+	netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
+		   buf->max_tcp_header_size);
+	netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
+		   buf->max_udp_header_size);
+	netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
+		   buf->max_large_tx_size);
+	netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
+		   buf->max_large_rx_size);
+	netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
+		   buf->ipv6_extension_header);
+	netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
+		   buf->tcp_pseudosum_req);
+	netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
+		   buf->num_ipv6_ext_headers);
+	netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
+		   buf->off_ipv6_ext_headers);
+
+	send_control_ip_offload(adapter);
+}
+
+static const char *ibmvnic_fw_err_cause(u16 cause)
+{
+	switch (cause) {
+	case ADAPTER_PROBLEM:
+		return "adapter problem";
+	case BUS_PROBLEM:
+		return "bus problem";
+	case FW_PROBLEM:
+		return "firmware problem";
+	case DD_PROBLEM:
+		return "device driver problem";
+	case EEH_RECOVERY:
+		return "EEH recovery";
+	case FW_UPDATED:
+		return "firmware updated";
+	case LOW_MEMORY:
+		return "low Memory";
+	default:
+		return "unknown";
+	}
+}
+
+static void handle_error_indication(union ibmvnic_crq *crq,
+				    struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	u16 cause;
+
+	cause = be16_to_cpu(crq->error_indication.error_cause);
+
+	dev_warn_ratelimited(dev,
+			     "Firmware reports %serror, cause: %s. Starting recovery...\n",
+			     crq->error_indication.flags
+				& IBMVNIC_FATAL_ERROR ? "FATAL " : "",
+			     ibmvnic_fw_err_cause(cause));
+
+	if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
+		ibmvnic_reset(adapter, VNIC_RESET_FATAL);
+	else
+		ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
+}
+
+static int handle_change_mac_rsp(union ibmvnic_crq *crq,
+				 struct ibmvnic_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	struct device *dev = &adapter->vdev->dev;
+	long rc;
+
+	rc = crq->change_mac_addr_rsp.rc.code;
+	if (rc) {
+		dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
+		goto out;
+	}
+	/* crq->change_mac_addr.mac_addr is the requested one
+	 * crq->change_mac_addr_rsp.mac_addr is the returned valid one.
+	 */
+	eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]);
+	ether_addr_copy(adapter->mac_addr,
+			&crq->change_mac_addr_rsp.mac_addr[0]);
+out:
+	complete(&adapter->fw_done);
+	return rc;
+}
+
+static void handle_request_cap_rsp(union ibmvnic_crq *crq,
+				   struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	u64 *req_value;
+	char *name;
+
+	atomic_dec(&adapter->running_cap_crqs);
+	netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n",
+		   atomic_read(&adapter->running_cap_crqs));
+	switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
+	case REQ_TX_QUEUES:
+		req_value = &adapter->req_tx_queues;
+		name = "tx";
+		break;
+	case REQ_RX_QUEUES:
+		req_value = &adapter->req_rx_queues;
+		name = "rx";
+		break;
+	case REQ_RX_ADD_QUEUES:
+		req_value = &adapter->req_rx_add_queues;
+		name = "rx_add";
+		break;
+	case REQ_TX_ENTRIES_PER_SUBCRQ:
+		req_value = &adapter->req_tx_entries_per_subcrq;
+		name = "tx_entries_per_subcrq";
+		break;
+	case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
+		req_value = &adapter->req_rx_add_entries_per_subcrq;
+		name = "rx_add_entries_per_subcrq";
+		break;
+	case REQ_MTU:
+		req_value = &adapter->req_mtu;
+		name = "mtu";
+		break;
+	case PROMISC_REQUESTED:
+		req_value = &adapter->promisc;
+		name = "promisc";
+		break;
+	default:
+		dev_err(dev, "Got invalid cap request rsp %d\n",
+			crq->request_capability.capability);
+		return;
+	}
+
+	switch (crq->request_capability_rsp.rc.code) {
+	case SUCCESS:
+		break;
+	case PARTIALSUCCESS:
+		dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
+			 *req_value,
+			 (long)be64_to_cpu(crq->request_capability_rsp.number),
+			 name);
+
+		if (be16_to_cpu(crq->request_capability_rsp.capability) ==
+		    REQ_MTU) {
+			pr_err("mtu of %llu is not supported. Reverting.\n",
+			       *req_value);
+			*req_value = adapter->fallback.mtu;
+		} else {
+			*req_value =
+				be64_to_cpu(crq->request_capability_rsp.number);
+		}
+
+		send_request_cap(adapter, 1);
+		return;
+	default:
+		dev_err(dev, "Error %d in request cap rsp\n",
+			crq->request_capability_rsp.rc.code);
+		return;
+	}
+
+	/* Done receiving requested capabilities, query IP offload support */
+	if (atomic_read(&adapter->running_cap_crqs) == 0)
+		send_query_ip_offload(adapter);
+}
+
+static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
+			    struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct net_device *netdev = adapter->netdev;
+	struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
+	struct ibmvnic_login_buffer *login = adapter->login_buf;
+	u64 *tx_handle_array;
+	u64 *rx_handle_array;
+	int num_tx_pools;
+	int num_rx_pools;
+	u64 *size_array;
+	u32 rsp_len;
+	int i;
+
+	/* CHECK: Test/set of login_pending does not need to be atomic
+	 * because only ibmvnic_tasklet tests/clears this.
+	 */
+	if (!adapter->login_pending) {
+		netdev_warn(netdev, "Ignoring unexpected login response\n");
+		return 0;
+	}
+	adapter->login_pending = false;
+
+	/* If the number of queues requested can't be allocated by the
+	 * server, the login response will return with code 1. We will need
+	 * to resend the login buffer with fewer queues requested.
+	 */
+	if (login_rsp_crq->generic.rc.code) {
+		adapter->init_done_rc = login_rsp_crq->generic.rc.code;
+		complete(&adapter->init_done);
+		return 0;
+	}
+
+	if (adapter->failover_pending) {
+		adapter->init_done_rc = -EAGAIN;
+		netdev_dbg(netdev, "Failover pending, ignoring login response\n");
+		complete(&adapter->init_done);
+		/* login response buffer will be released on reset */
+		return 0;
+	}
+
+	netdev->mtu = adapter->req_mtu - ETH_HLEN;
+
+	netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
+	for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
+		netdev_dbg(adapter->netdev, "%016lx\n",
+			   ((unsigned long *)(adapter->login_rsp_buf))[i]);
+	}
+
+	/* Sanity checks */
+	if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
+	    (be32_to_cpu(login->num_rxcomp_subcrqs) *
+	     adapter->req_rx_add_queues !=
+	     be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
+		dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
+		ibmvnic_reset(adapter, VNIC_RESET_FATAL);
+		return -EIO;
+	}
+
+	rsp_len = be32_to_cpu(login_rsp->len);
+	if (be32_to_cpu(login->login_rsp_len) < rsp_len ||
+	    rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) ||
+	    rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) ||
+	    rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) ||
+	    rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) {
+		/* This can happen if a login request times out and there are
+		 * 2 outstanding login requests sent, the LOGIN_RSP crq
+		 * could have been for the older login request. So we are
+		 * parsing the newer response buffer which may be incomplete
+		 */
+		dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n");
+		ibmvnic_reset(adapter, VNIC_RESET_FATAL);
+		return -EIO;
+	}
+
+	size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+		be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
+	/* variable buffer sizes are not supported, so just read the
+	 * first entry.
+	 */
+	adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
+
+	num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
+	num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+
+	tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+				  be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
+	rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+				  be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
+
+	for (i = 0; i < num_tx_pools; i++)
+		adapter->tx_scrq[i]->handle = tx_handle_array[i];
+
+	for (i = 0; i < num_rx_pools; i++)
+		adapter->rx_scrq[i]->handle = rx_handle_array[i];
+
+	adapter->num_active_tx_scrqs = num_tx_pools;
+	adapter->num_active_rx_scrqs = num_rx_pools;
+	release_login_rsp_buffer(adapter);
+	release_login_buffer(adapter);
+	complete(&adapter->init_done);
+
+	return 0;
+}
+
+static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
+				     struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	long rc;
+
+	rc = crq->request_unmap_rsp.rc.code;
+	if (rc)
+		dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
+}
+
+static void handle_query_map_rsp(union ibmvnic_crq *crq,
+				 struct ibmvnic_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	struct device *dev = &adapter->vdev->dev;
+	long rc;
+
+	rc = crq->query_map_rsp.rc.code;
+	if (rc) {
+		dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
+		return;
+	}
+	netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n",
+		   crq->query_map_rsp.page_size,
+		   __be32_to_cpu(crq->query_map_rsp.tot_pages),
+		   __be32_to_cpu(crq->query_map_rsp.free_pages));
+}
+
+static void handle_query_cap_rsp(union ibmvnic_crq *crq,
+				 struct ibmvnic_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	struct device *dev = &adapter->vdev->dev;
+	long rc;
+
+	atomic_dec(&adapter->running_cap_crqs);
+	netdev_dbg(netdev, "Outstanding queries: %d\n",
+		   atomic_read(&adapter->running_cap_crqs));
+	rc = crq->query_capability.rc.code;
+	if (rc) {
+		dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
+		goto out;
+	}
+
+	switch (be16_to_cpu(crq->query_capability.capability)) {
+	case MIN_TX_QUEUES:
+		adapter->min_tx_queues =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "min_tx_queues = %lld\n",
+			   adapter->min_tx_queues);
+		break;
+	case MIN_RX_QUEUES:
+		adapter->min_rx_queues =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "min_rx_queues = %lld\n",
+			   adapter->min_rx_queues);
+		break;
+	case MIN_RX_ADD_QUEUES:
+		adapter->min_rx_add_queues =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
+			   adapter->min_rx_add_queues);
+		break;
+	case MAX_TX_QUEUES:
+		adapter->max_tx_queues =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "max_tx_queues = %lld\n",
+			   adapter->max_tx_queues);
+		break;
+	case MAX_RX_QUEUES:
+		adapter->max_rx_queues =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "max_rx_queues = %lld\n",
+			   adapter->max_rx_queues);
+		break;
+	case MAX_RX_ADD_QUEUES:
+		adapter->max_rx_add_queues =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
+			   adapter->max_rx_add_queues);
+		break;
+	case MIN_TX_ENTRIES_PER_SUBCRQ:
+		adapter->min_tx_entries_per_subcrq =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
+			   adapter->min_tx_entries_per_subcrq);
+		break;
+	case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
+		adapter->min_rx_add_entries_per_subcrq =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
+			   adapter->min_rx_add_entries_per_subcrq);
+		break;
+	case MAX_TX_ENTRIES_PER_SUBCRQ:
+		adapter->max_tx_entries_per_subcrq =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
+			   adapter->max_tx_entries_per_subcrq);
+		break;
+	case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
+		adapter->max_rx_add_entries_per_subcrq =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
+			   adapter->max_rx_add_entries_per_subcrq);
+		break;
+	case TCP_IP_OFFLOAD:
+		adapter->tcp_ip_offload =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
+			   adapter->tcp_ip_offload);
+		break;
+	case PROMISC_SUPPORTED:
+		adapter->promisc_supported =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "promisc_supported = %lld\n",
+			   adapter->promisc_supported);
+		break;
+	case MIN_MTU:
+		adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
+		netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
+		netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
+		break;
+	case MAX_MTU:
+		adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
+		netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
+		netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
+		break;
+	case MAX_MULTICAST_FILTERS:
+		adapter->max_multicast_filters =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "max_multicast_filters = %lld\n",
+			   adapter->max_multicast_filters);
+		break;
+	case VLAN_HEADER_INSERTION:
+		adapter->vlan_header_insertion =
+		    be64_to_cpu(crq->query_capability.number);
+		if (adapter->vlan_header_insertion)
+			netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
+		netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
+			   adapter->vlan_header_insertion);
+		break;
+	case RX_VLAN_HEADER_INSERTION:
+		adapter->rx_vlan_header_insertion =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
+			   adapter->rx_vlan_header_insertion);
+		break;
+	case MAX_TX_SG_ENTRIES:
+		adapter->max_tx_sg_entries =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
+			   adapter->max_tx_sg_entries);
+		break;
+	case RX_SG_SUPPORTED:
+		adapter->rx_sg_supported =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "rx_sg_supported = %lld\n",
+			   adapter->rx_sg_supported);
+		break;
+	case OPT_TX_COMP_SUB_QUEUES:
+		adapter->opt_tx_comp_sub_queues =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
+			   adapter->opt_tx_comp_sub_queues);
+		break;
+	case OPT_RX_COMP_QUEUES:
+		adapter->opt_rx_comp_queues =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
+			   adapter->opt_rx_comp_queues);
+		break;
+	case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
+		adapter->opt_rx_bufadd_q_per_rx_comp_q =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
+			   adapter->opt_rx_bufadd_q_per_rx_comp_q);
+		break;
+	case OPT_TX_ENTRIES_PER_SUBCRQ:
+		adapter->opt_tx_entries_per_subcrq =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
+			   adapter->opt_tx_entries_per_subcrq);
+		break;
+	case OPT_RXBA_ENTRIES_PER_SUBCRQ:
+		adapter->opt_rxba_entries_per_subcrq =
+		    be64_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
+			   adapter->opt_rxba_entries_per_subcrq);
+		break;
+	case TX_RX_DESC_REQ:
+		adapter->tx_rx_desc_req = crq->query_capability.number;
+		netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
+			   adapter->tx_rx_desc_req);
+		break;
+
+	default:
+		netdev_err(netdev, "Got invalid cap rsp %d\n",
+			   crq->query_capability.capability);
+	}
+
+out:
+	if (atomic_read(&adapter->running_cap_crqs) == 0)
+		send_request_cap(adapter, 0);
+}
+
+static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
+{
+	union ibmvnic_crq crq;
+	int rc;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
+	crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
+
+	mutex_lock(&adapter->fw_lock);
+	adapter->fw_done_rc = 0;
+	reinit_completion(&adapter->fw_done);
+
+	rc = ibmvnic_send_crq(adapter, &crq);
+	if (rc) {
+		mutex_unlock(&adapter->fw_lock);
+		return rc;
+	}
+
+	rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
+	if (rc) {
+		mutex_unlock(&adapter->fw_lock);
+		return rc;
+	}
+
+	mutex_unlock(&adapter->fw_lock);
+	return adapter->fw_done_rc ? -EIO : 0;
+}
+
+static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
+				       struct ibmvnic_adapter *adapter)
+{
+	struct net_device *netdev = adapter->netdev;
+	int rc;
+	__be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
+
+	rc = crq->query_phys_parms_rsp.rc.code;
+	if (rc) {
+		netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
+		return rc;
+	}
+	switch (rspeed) {
+	case IBMVNIC_10MBPS:
+		adapter->speed = SPEED_10;
+		break;
+	case IBMVNIC_100MBPS:
+		adapter->speed = SPEED_100;
+		break;
+	case IBMVNIC_1GBPS:
+		adapter->speed = SPEED_1000;
+		break;
+	case IBMVNIC_10GBPS:
+		adapter->speed = SPEED_10000;
+		break;
+	case IBMVNIC_25GBPS:
+		adapter->speed = SPEED_25000;
+		break;
+	case IBMVNIC_40GBPS:
+		adapter->speed = SPEED_40000;
+		break;
+	case IBMVNIC_50GBPS:
+		adapter->speed = SPEED_50000;
+		break;
+	case IBMVNIC_100GBPS:
+		adapter->speed = SPEED_100000;
+		break;
+	case IBMVNIC_200GBPS:
+		adapter->speed = SPEED_200000;
+		break;
+	default:
+		if (netif_carrier_ok(netdev))
+			netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
+		adapter->speed = SPEED_UNKNOWN;
+	}
+	if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
+		adapter->duplex = DUPLEX_FULL;
+	else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
+		adapter->duplex = DUPLEX_HALF;
+	else
+		adapter->duplex = DUPLEX_UNKNOWN;
+
+	return rc;
+}
+
+static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
+			       struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_generic_crq *gen_crq = &crq->generic;
+	struct net_device *netdev = adapter->netdev;
+	struct device *dev = &adapter->vdev->dev;
+	u64 *u64_crq = (u64 *)crq;
+	long rc;
+
+	netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
+		   (unsigned long)cpu_to_be64(u64_crq[0]),
+		   (unsigned long)cpu_to_be64(u64_crq[1]));
+	switch (gen_crq->first) {
+	case IBMVNIC_CRQ_INIT_RSP:
+		switch (gen_crq->cmd) {
+		case IBMVNIC_CRQ_INIT:
+			dev_info(dev, "Partner initialized\n");
+			adapter->from_passive_init = true;
+			/* Discard any stale login responses from prev reset.
+			 * CHECK: should we clear even on INIT_COMPLETE?
+			 */
+			adapter->login_pending = false;
+
+			if (adapter->state == VNIC_DOWN)
+				rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT);
+			else
+				rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
+
+			if (rc && rc != -EBUSY) {
+				/* We were unable to schedule the failover
+				 * reset either because the adapter was still
+				 * probing (eg: during kexec) or we could not
+				 * allocate memory. Clear the failover_pending
+				 * flag since no one else will. We ignore
+				 * EBUSY because it means either FAILOVER reset
+				 * is already scheduled or the adapter is
+				 * being removed.
+				 */
+				netdev_err(netdev,
+					   "Error %ld scheduling failover reset\n",
+					   rc);
+				adapter->failover_pending = false;
+			}
+
+			if (!completion_done(&adapter->init_done)) {
+				if (!adapter->init_done_rc)
+					adapter->init_done_rc = -EAGAIN;
+				complete(&adapter->init_done);
+			}
+
+			break;
+		case IBMVNIC_CRQ_INIT_COMPLETE:
+			dev_info(dev, "Partner initialization complete\n");
+			adapter->crq.active = true;
+			send_version_xchg(adapter);
+			break;
+		default:
+			dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
+		}
+		return;
+	case IBMVNIC_CRQ_XPORT_EVENT:
+		netif_carrier_off(netdev);
+		adapter->crq.active = false;
+		/* terminate any thread waiting for a response
+		 * from the device
+		 */
+		if (!completion_done(&adapter->fw_done)) {
+			adapter->fw_done_rc = -EIO;
+			complete(&adapter->fw_done);
+		}
+
+		/* if we got here during crq-init, retry crq-init */
+		if (!completion_done(&adapter->init_done)) {
+			adapter->init_done_rc = -EAGAIN;
+			complete(&adapter->init_done);
+		}
+
+		if (!completion_done(&adapter->stats_done))
+			complete(&adapter->stats_done);
+		if (test_bit(0, &adapter->resetting))
+			adapter->force_reset_recovery = true;
+		if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
+			dev_info(dev, "Migrated, re-enabling adapter\n");
+			ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
+		} else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
+			dev_info(dev, "Backing device failover detected\n");
+			adapter->failover_pending = true;
+		} else {
+			/* The adapter lost the connection */
+			dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
+				gen_crq->cmd);
+			ibmvnic_reset(adapter, VNIC_RESET_FATAL);
+		}
+		return;
+	case IBMVNIC_CRQ_CMD_RSP:
+		break;
+	default:
+		dev_err(dev, "Got an invalid msg type 0x%02x\n",
+			gen_crq->first);
+		return;
+	}
+
+	switch (gen_crq->cmd) {
+	case VERSION_EXCHANGE_RSP:
+		rc = crq->version_exchange_rsp.rc.code;
+		if (rc) {
+			dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
+			break;
+		}
+		ibmvnic_version =
+			    be16_to_cpu(crq->version_exchange_rsp.version);
+		dev_info(dev, "Partner protocol version is %d\n",
+			 ibmvnic_version);
+		send_query_cap(adapter);
+		break;
+	case QUERY_CAPABILITY_RSP:
+		handle_query_cap_rsp(crq, adapter);
+		break;
+	case QUERY_MAP_RSP:
+		handle_query_map_rsp(crq, adapter);
+		break;
+	case REQUEST_MAP_RSP:
+		adapter->fw_done_rc = crq->request_map_rsp.rc.code;
+		complete(&adapter->fw_done);
+		break;
+	case REQUEST_UNMAP_RSP:
+		handle_request_unmap_rsp(crq, adapter);
+		break;
+	case REQUEST_CAPABILITY_RSP:
+		handle_request_cap_rsp(crq, adapter);
+		break;
+	case LOGIN_RSP:
+		netdev_dbg(netdev, "Got Login Response\n");
+		handle_login_rsp(crq, adapter);
+		break;
+	case LOGICAL_LINK_STATE_RSP:
+		netdev_dbg(netdev,
+			   "Got Logical Link State Response, state: %d rc: %d\n",
+			   crq->logical_link_state_rsp.link_state,
+			   crq->logical_link_state_rsp.rc.code);
+		adapter->logical_link_state =
+		    crq->logical_link_state_rsp.link_state;
+		adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
+		complete(&adapter->init_done);
+		break;
+	case LINK_STATE_INDICATION:
+		netdev_dbg(netdev, "Got Logical Link State Indication\n");
+		adapter->phys_link_state =
+		    crq->link_state_indication.phys_link_state;
+		adapter->logical_link_state =
+		    crq->link_state_indication.logical_link_state;
+		if (adapter->phys_link_state && adapter->logical_link_state)
+			netif_carrier_on(netdev);
+		else
+			netif_carrier_off(netdev);
+		break;
+	case CHANGE_MAC_ADDR_RSP:
+		netdev_dbg(netdev, "Got MAC address change Response\n");
+		adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
+		break;
+	case ERROR_INDICATION:
+		netdev_dbg(netdev, "Got Error Indication\n");
+		handle_error_indication(crq, adapter);
+		break;
+	case REQUEST_STATISTICS_RSP:
+		netdev_dbg(netdev, "Got Statistics Response\n");
+		complete(&adapter->stats_done);
+		break;
+	case QUERY_IP_OFFLOAD_RSP:
+		netdev_dbg(netdev, "Got Query IP offload Response\n");
+		handle_query_ip_offload_rsp(adapter);
+		break;
+	case MULTICAST_CTRL_RSP:
+		netdev_dbg(netdev, "Got multicast control Response\n");
+		break;
+	case CONTROL_IP_OFFLOAD_RSP:
+		netdev_dbg(netdev, "Got Control IP offload Response\n");
+		dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
+				 sizeof(adapter->ip_offload_ctrl),
+				 DMA_TO_DEVICE);
+		complete(&adapter->init_done);
+		break;
+	case COLLECT_FW_TRACE_RSP:
+		netdev_dbg(netdev, "Got Collect firmware trace Response\n");
+		complete(&adapter->fw_done);
+		break;
+	case GET_VPD_SIZE_RSP:
+		handle_vpd_size_rsp(crq, adapter);
+		break;
+	case GET_VPD_RSP:
+		handle_vpd_rsp(crq, adapter);
+		break;
+	case QUERY_PHYS_PARMS_RSP:
+		adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
+		complete(&adapter->fw_done);
+		break;
+	default:
+		netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
+			   gen_crq->cmd);
+	}
+}
+
+static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
+{
+	struct ibmvnic_adapter *adapter = instance;
+
+	tasklet_schedule(&adapter->tasklet);
+	return IRQ_HANDLED;
+}
+
+static void ibmvnic_tasklet(struct tasklet_struct *t)
+{
+	struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
+	struct ibmvnic_crq_queue *queue = &adapter->crq;
+	union ibmvnic_crq *crq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&queue->lock, flags);
+
+	/* Pull all the valid messages off the CRQ */
+	while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
+		/* This barrier makes sure ibmvnic_next_crq()'s
+		 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
+		 * before ibmvnic_handle_crq()'s
+		 * switch(gen_crq->first) and switch(gen_crq->cmd).
+		 */
+		dma_rmb();
+		ibmvnic_handle_crq(crq, adapter);
+		crq->generic.first = 0;
+	}
+
+	spin_unlock_irqrestore(&queue->lock, flags);
+}
+
+static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
+{
+	struct vio_dev *vdev = adapter->vdev;
+	int rc;
+
+	do {
+		rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
+	} while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+	if (rc)
+		dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
+
+	return rc;
+}
+
+static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_crq_queue *crq = &adapter->crq;
+	struct device *dev = &adapter->vdev->dev;
+	struct vio_dev *vdev = adapter->vdev;
+	int rc;
+
+	/* Close the CRQ */
+	do {
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+	/* Clean out the queue */
+	if (!crq->msgs)
+		return -EINVAL;
+
+	memset(crq->msgs, 0, PAGE_SIZE);
+	crq->cur = 0;
+	crq->active = false;
+
+	/* And re-open it again */
+	rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
+				crq->msg_token, PAGE_SIZE);
+
+	if (rc == H_CLOSED)
+		/* Adapter is good, but other end is not ready */
+		dev_warn(dev, "Partner adapter not ready\n");
+	else if (rc != 0)
+		dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
+
+	return rc;
+}
+
+static void release_crq_queue(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_crq_queue *crq = &adapter->crq;
+	struct vio_dev *vdev = adapter->vdev;
+	long rc;
+
+	if (!crq->msgs)
+		return;
+
+	netdev_dbg(adapter->netdev, "Releasing CRQ\n");
+	free_irq(vdev->irq, adapter);
+	tasklet_kill(&adapter->tasklet);
+	do {
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+	dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
+			 DMA_BIDIRECTIONAL);
+	free_page((unsigned long)crq->msgs);
+	crq->msgs = NULL;
+	crq->active = false;
+}
+
+static int init_crq_queue(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_crq_queue *crq = &adapter->crq;
+	struct device *dev = &adapter->vdev->dev;
+	struct vio_dev *vdev = adapter->vdev;
+	int rc, retrc = -ENOMEM;
+
+	if (crq->msgs)
+		return 0;
+
+	crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
+	/* Should we allocate more than one page? */
+
+	if (!crq->msgs)
+		return -ENOMEM;
+
+	crq->size = PAGE_SIZE / sizeof(*crq->msgs);
+	crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
+					DMA_BIDIRECTIONAL);
+	if (dma_mapping_error(dev, crq->msg_token))
+		goto map_failed;
+
+	rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
+				crq->msg_token, PAGE_SIZE);
+
+	if (rc == H_RESOURCE)
+		/* maybe kexecing and resource is busy. try a reset */
+		rc = ibmvnic_reset_crq(adapter);
+	retrc = rc;
+
+	if (rc == H_CLOSED) {
+		dev_warn(dev, "Partner adapter not ready\n");
+	} else if (rc) {
+		dev_warn(dev, "Error %d opening adapter\n", rc);
+		goto reg_crq_failed;
+	}
+
+	retrc = 0;
+
+	tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
+
+	netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
+	snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
+		 adapter->vdev->unit_address);
+	rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
+	if (rc) {
+		dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
+			vdev->irq, rc);
+		goto req_irq_failed;
+	}
+
+	rc = vio_enable_interrupts(vdev);
+	if (rc) {
+		dev_err(dev, "Error %d enabling interrupts\n", rc);
+		goto req_irq_failed;
+	}
+
+	crq->cur = 0;
+	spin_lock_init(&crq->lock);
+
+	/* process any CRQs that were queued before we enabled interrupts */
+	tasklet_schedule(&adapter->tasklet);
+
+	return retrc;
+
+req_irq_failed:
+	tasklet_kill(&adapter->tasklet);
+	do {
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+reg_crq_failed:
+	dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
+map_failed:
+	free_page((unsigned long)crq->msgs);
+	crq->msgs = NULL;
+	return retrc;
+}
+
+static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
+{
+	struct device *dev = &adapter->vdev->dev;
+	unsigned long timeout = msecs_to_jiffies(20000);
+	u64 old_num_rx_queues = adapter->req_rx_queues;
+	u64 old_num_tx_queues = adapter->req_tx_queues;
+	int rc;
+
+	adapter->from_passive_init = false;
+
+	rc = ibmvnic_send_crq_init(adapter);
+	if (rc) {
+		dev_err(dev, "Send crq init failed with error %d\n", rc);
+		return rc;
+	}
+
+	if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
+		dev_err(dev, "Initialization sequence timed out\n");
+		return -ETIMEDOUT;
+	}
+
+	if (adapter->init_done_rc) {
+		release_crq_queue(adapter);
+		dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc);
+		return adapter->init_done_rc;
+	}
+
+	if (adapter->from_passive_init) {
+		adapter->state = VNIC_OPEN;
+		adapter->from_passive_init = false;
+		dev_err(dev, "CRQ-init failed, passive-init\n");
+		return -EINVAL;
+	}
+
+	if (reset &&
+	    test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
+	    adapter->reset_reason != VNIC_RESET_MOBILITY) {
+		if (adapter->req_rx_queues != old_num_rx_queues ||
+		    adapter->req_tx_queues != old_num_tx_queues) {
+			release_sub_crqs(adapter, 0);
+			rc = init_sub_crqs(adapter);
+		} else {
+			/* no need to reinitialize completely, but we do
+			 * need to clean up transmits that were in flight
+			 * when we processed the reset.  Failure to do so
+			 * will confound the upper layer, usually TCP, by
+			 * creating the illusion of transmits that are
+			 * awaiting completion.
+			 */
+			clean_tx_pools(adapter);
+
+			rc = reset_sub_crq_queues(adapter);
+		}
+	} else {
+		rc = init_sub_crqs(adapter);
+	}
+
+	if (rc) {
+		dev_err(dev, "Initialization of sub crqs failed\n");
+		release_crq_queue(adapter);
+		return rc;
+	}
+
+	rc = init_sub_crq_irqs(adapter);
+	if (rc) {
+		dev_err(dev, "Failed to initialize sub crq irqs\n");
+		release_crq_queue(adapter);
+	}
+
+	return rc;
+}
+
+static struct device_attribute dev_attr_failover;
+
+static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
+{
+	struct ibmvnic_adapter *adapter;
+	struct net_device *netdev;
+	unsigned char *mac_addr_p;
+	unsigned long flags;
+	bool init_success;
+	int rc;
+
+	dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
+		dev->unit_address);
+
+	mac_addr_p = (unsigned char *)vio_get_attribute(dev,
+							VETH_MAC_ADDR, NULL);
+	if (!mac_addr_p) {
+		dev_err(&dev->dev,
+			"(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
+			__FILE__, __LINE__);
+		return 0;
+	}
+
+	netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
+				   IBMVNIC_MAX_QUEUES);
+	if (!netdev)
+		return -ENOMEM;
+
+	adapter = netdev_priv(netdev);
+	adapter->state = VNIC_PROBING;
+	dev_set_drvdata(&dev->dev, netdev);
+	adapter->vdev = dev;
+	adapter->netdev = netdev;
+	adapter->login_pending = false;
+	memset(&adapter->map_ids, 0, sizeof(adapter->map_ids));
+	/* map_ids start at 1, so ensure map_id 0 is always "in-use" */
+	bitmap_set(adapter->map_ids, 0, 1);
+
+	ether_addr_copy(adapter->mac_addr, mac_addr_p);
+	eth_hw_addr_set(netdev, adapter->mac_addr);
+	netdev->irq = dev->irq;
+	netdev->netdev_ops = &ibmvnic_netdev_ops;
+	netdev->ethtool_ops = &ibmvnic_ethtool_ops;
+	SET_NETDEV_DEV(netdev, &dev->dev);
+
+	INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
+	INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
+			  __ibmvnic_delayed_reset);
+	INIT_LIST_HEAD(&adapter->rwi_list);
+	spin_lock_init(&adapter->rwi_lock);
+	spin_lock_init(&adapter->state_lock);
+	mutex_init(&adapter->fw_lock);
+	init_completion(&adapter->probe_done);
+	init_completion(&adapter->init_done);
+	init_completion(&adapter->fw_done);
+	init_completion(&adapter->reset_done);
+	init_completion(&adapter->stats_done);
+	clear_bit(0, &adapter->resetting);
+	adapter->prev_rx_buf_sz = 0;
+	adapter->prev_mtu = 0;
+
+	init_success = false;
+	do {
+		reinit_init_done(adapter);
+
+		/* clear any failovers we got in the previous pass
+		 * since we are reinitializing the CRQ
+		 */
+		adapter->failover_pending = false;
+
+		/* If we had already initialized CRQ, we may have one or
+		 * more resets queued already. Discard those and release
+		 * the CRQ before initializing the CRQ again.
+		 */
+		release_crq_queue(adapter);
+
+		/* Since we are still in PROBING state, __ibmvnic_reset()
+		 * will not access the ->rwi_list and since we released CRQ,
+		 * we won't get _new_ transport events. But there maybe an
+		 * ongoing ibmvnic_reset() call. So serialize access to
+		 * rwi_list. If we win the race, ibvmnic_reset() could add
+		 * a reset after we purged but thats ok - we just may end
+		 * up with an extra reset (i.e similar to having two or more
+		 * resets in the queue at once).
+		 * CHECK.
+		 */
+		spin_lock_irqsave(&adapter->rwi_lock, flags);
+		flush_reset_queue(adapter);
+		spin_unlock_irqrestore(&adapter->rwi_lock, flags);
+
+		rc = init_crq_queue(adapter);
+		if (rc) {
+			dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
+				rc);
+			goto ibmvnic_init_fail;
+		}
+
+		rc = ibmvnic_reset_init(adapter, false);
+	} while (rc == -EAGAIN);
+
+	/* We are ignoring the error from ibmvnic_reset_init() assuming that the
+	 * partner is not ready. CRQ is not active. When the partner becomes
+	 * ready, we will do the passive init reset.
+	 */
+
+	if (!rc)
+		init_success = true;
+
+	rc = init_stats_buffers(adapter);
+	if (rc)
+		goto ibmvnic_init_fail;
+
+	rc = init_stats_token(adapter);
+	if (rc)
+		goto ibmvnic_stats_fail;
+
+	rc = device_create_file(&dev->dev, &dev_attr_failover);
+	if (rc)
+		goto ibmvnic_dev_file_err;
+
+	netif_carrier_off(netdev);
+
+	if (init_success) {
+		adapter->state = VNIC_PROBED;
+		netdev->mtu = adapter->req_mtu - ETH_HLEN;
+		netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
+		netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
+	} else {
+		adapter->state = VNIC_DOWN;
+	}
+
+	adapter->wait_for_reset = false;
+	adapter->last_reset_time = jiffies;
+
+	rc = register_netdev(netdev);
+	if (rc) {
+		dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
+		goto ibmvnic_register_fail;
+	}
+	dev_info(&dev->dev, "ibmvnic registered\n");
+
+	rc = ibmvnic_cpu_notif_add(adapter);
+	if (rc) {
+		netdev_err(netdev, "Registering cpu notifier failed\n");
+		goto cpu_notif_add_failed;
+	}
+
+	complete(&adapter->probe_done);
+
+	return 0;
+
+cpu_notif_add_failed:
+	unregister_netdev(netdev);
+
+ibmvnic_register_fail:
+	device_remove_file(&dev->dev, &dev_attr_failover);
+
+ibmvnic_dev_file_err:
+	release_stats_token(adapter);
+
+ibmvnic_stats_fail:
+	release_stats_buffers(adapter);
+
+ibmvnic_init_fail:
+	release_sub_crqs(adapter, 1);
+	release_crq_queue(adapter);
+
+	/* cleanup worker thread after releasing CRQ so we don't get
+	 * transport events (i.e new work items for the worker thread).
+	 */
+	adapter->state = VNIC_REMOVING;
+	complete(&adapter->probe_done);
+	flush_work(&adapter->ibmvnic_reset);
+	flush_delayed_work(&adapter->ibmvnic_delayed_reset);
+
+	flush_reset_queue(adapter);
+
+	mutex_destroy(&adapter->fw_lock);
+	free_netdev(netdev);
+
+	return rc;
+}
+
+static void ibmvnic_remove(struct vio_dev *dev)
+{
+	struct net_device *netdev = dev_get_drvdata(&dev->dev);
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&adapter->state_lock, flags);
+
+	/* If ibmvnic_reset() is scheduling a reset, wait for it to
+	 * finish. Then, set the state to REMOVING to prevent it from
+	 * scheduling any more work and to have reset functions ignore
+	 * any resets that have already been scheduled. Drop the lock
+	 * after setting state, so __ibmvnic_reset() which is called
+	 * from the flush_work() below, can make progress.
+	 */
+	spin_lock(&adapter->rwi_lock);
+	adapter->state = VNIC_REMOVING;
+	spin_unlock(&adapter->rwi_lock);
+
+	spin_unlock_irqrestore(&adapter->state_lock, flags);
+
+	ibmvnic_cpu_notif_remove(adapter);
+
+	flush_work(&adapter->ibmvnic_reset);
+	flush_delayed_work(&adapter->ibmvnic_delayed_reset);
+
+	rtnl_lock();
+	unregister_netdevice(netdev);
+
+	release_resources(adapter);
+	release_rx_pools(adapter);
+	release_tx_pools(adapter);
+	release_sub_crqs(adapter, 1);
+	release_crq_queue(adapter);
+
+	release_stats_token(adapter);
+	release_stats_buffers(adapter);
+
+	adapter->state = VNIC_REMOVED;
+
+	rtnl_unlock();
+	mutex_destroy(&adapter->fw_lock);
+	device_remove_file(&dev->dev, &dev_attr_failover);
+	free_netdev(netdev);
+	dev_set_drvdata(&dev->dev, NULL);
+}
+
+static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct net_device *netdev = dev_get_drvdata(dev);
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+	__be64 session_token;
+	long rc;
+
+	if (!sysfs_streq(buf, "1"))
+		return -EINVAL;
+
+	rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
+			 H_GET_SESSION_TOKEN, 0, 0, 0);
+	if (rc) {
+		netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
+			   rc);
+		goto last_resort;
+	}
+
+	session_token = (__be64)retbuf[0];
+	netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
+		   be64_to_cpu(session_token));
+	rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
+				H_SESSION_ERR_DETECTED, session_token, 0, 0);
+	if (rc) {
+		netdev_err(netdev,
+			   "H_VIOCTL initiated failover failed, rc %ld\n",
+			   rc);
+		goto last_resort;
+	}
+
+	return count;
+
+last_resort:
+	netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n");
+	ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
+
+	return count;
+}
+static DEVICE_ATTR_WO(failover);
+
+static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
+{
+	struct net_device *netdev = dev_get_drvdata(&vdev->dev);
+	struct ibmvnic_adapter *adapter;
+	struct iommu_table *tbl;
+	unsigned long ret = 0;
+	int i;
+
+	tbl = get_iommu_table_base(&vdev->dev);
+
+	/* netdev inits at probe time along with the structures we need below*/
+	if (!netdev)
+		return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
+
+	adapter = netdev_priv(netdev);
+
+	ret += PAGE_SIZE; /* the crq message queue */
+	ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
+
+	for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
+		ret += 4 * PAGE_SIZE; /* the scrq message queue */
+
+	for (i = 0; i < adapter->num_active_rx_pools; i++)
+		ret += adapter->rx_pool[i].size *
+		    IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
+
+	return ret;
+}
+
+static int ibmvnic_resume(struct device *dev)
+{
+	struct net_device *netdev = dev_get_drvdata(dev);
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	if (adapter->state != VNIC_OPEN)
+		return 0;
+
+	tasklet_schedule(&adapter->tasklet);
+
+	return 0;
+}
+
+static const struct vio_device_id ibmvnic_device_table[] = {
+	{"network", "IBM,vnic"},
+	{"", "" }
+};
+MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
+
+static const struct dev_pm_ops ibmvnic_pm_ops = {
+	.resume = ibmvnic_resume
+};
+
+static struct vio_driver ibmvnic_driver = {
+	.id_table       = ibmvnic_device_table,
+	.probe          = ibmvnic_probe,
+	.remove         = ibmvnic_remove,
+	.get_desired_dma = ibmvnic_get_desired_dma,
+	.name		= ibmvnic_driver_name,
+	.pm		= &ibmvnic_pm_ops,
+};
+
+/* module functions */
+static int __init ibmvnic_module_init(void)
+{
+	int ret;
+
+	ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online",
+				      ibmvnic_cpu_online,
+				      ibmvnic_cpu_down_prep);
+	if (ret < 0)
+		goto out;
+	ibmvnic_online = ret;
+	ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead",
+				      NULL, ibmvnic_cpu_dead);
+	if (ret)
+		goto err_dead;
+
+	ret = vio_register_driver(&ibmvnic_driver);
+	if (ret)
+		goto err_vio_register;
+
+	pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
+		IBMVNIC_DRIVER_VERSION);
+
+	return 0;
+err_vio_register:
+	cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD);
+err_dead:
+	cpuhp_remove_multi_state(ibmvnic_online);
+out:
+	return ret;
+}
+
+static void __exit ibmvnic_module_exit(void)
+{
+	vio_unregister_driver(&ibmvnic_driver);
+	cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD);
+	cpuhp_remove_multi_state(ibmvnic_online);
+}
+
+module_init(ibmvnic_module_init);
+module_exit(ibmvnic_module_exit);