Driver for IBM System i/p VNIC protocol

This is a new device driver for a high performance SR-IOV assisted virtual
network for IBM System p and IBM System i systems.  The SR-IOV VF will be
attached to the VIOS partition and mapped to the Linux client via the
hypervisor's VNIC protocol that this driver implements.

This driver is able to perform basic tx and rx, new features
and improvements will be added as they are being developed and tested.
Signed-off-by: NThomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: NJohn Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -5292,6 +5292,13 @@ L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/ibm/ibmveth.*
 
+IBM Power SRIOV Virtual NIC Device Driver
+M:	Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
+M:	John Allen <jallen@linux.vnet.ibm.com>
+L:	netdev@vger.kernel.org
+S:	Supported
+F:	drivers/net/ethernet/ibm/ibmvnic.*
+
 IBM Power Virtual SCSI Device Drivers
 M:	Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
 L:	linux-scsi@vger.kernel.org

arch/powerpc/include/asm/hvcall.h

@@ -258,11 +258,16 @@
 #define H_DEL_CONN		0x288
 #define H_JOIN			0x298
 #define H_VASI_STATE            0x2A4
+#define H_VIOCTL		0x2A8
 #define H_ENABLE_CRQ		0x2B0
 #define H_GET_EM_PARMS		0x2B8
 #define H_SET_MPP		0x2D0
 #define H_GET_MPP		0x2D4
+#define H_REG_SUB_CRQ		0x2DC
 #define H_HOME_NODE_ASSOCIATIVITY 0x2EC
+#define H_FREE_SUB_CRQ		0x2E0
+#define H_SEND_SUB_CRQ		0x2E4
+#define H_SEND_SUB_CRQ_INDIRECT	0x2E8
 #define H_BEST_ENERGY		0x2F4
 #define H_XIRR_X		0x2FC
 #define H_RANDOM		0x300
@@ -271,6 +276,21 @@
 #define H_SET_MODE		0x31C
 #define MAX_HCALL_OPCODE	H_SET_MODE
 
+/* H_VIOCTL functions */
+#define H_GET_VIOA_DUMP_SIZE	0x01
+#define H_GET_VIOA_DUMP		0x02
+#define H_GET_ILLAN_NUM_VLAN_IDS 0x03
+#define H_GET_ILLAN_VLAN_ID_LIST 0x04
+#define H_GET_ILLAN_SWITCH_ID	0x05
+#define H_DISABLE_MIGRATION	0x06
+#define H_ENABLE_MIGRATION	0x07
+#define H_GET_PARTNER_INFO	0x08
+#define H_GET_PARTNER_WWPN_LIST	0x09
+#define H_DISABLE_ALL_VIO_INTS	0x0A
+#define H_DISABLE_VIO_INTERRUPT	0x0B
+#define H_ENABLE_VIO_INTERRUPT	0x0C
+
+
 /* Platform specific hcalls, used by KVM */
 #define H_RTAS			0xf000
 

drivers/net/ethernet/ibm/Kconfig

@@ -37,4 +37,14 @@ config EHEA
 	  To compile the driver as a module, choose M here. The module
 	  will be called ehea.
 
+config IBMVNIC
+	tristate "IBM Virtual NIC support"
+	depends on PPC_PSERIES
+	---help---
+	  This driver supports Virtual NIC adapters on IBM i and IBM System p
+	  systems.
+
+	  To compile this driver as a module, choose M here. The module will
+	  be called ibmvnic.
+
 endif # NET_VENDOR_IBM

drivers/net/ethernet/ibm/Makefile

@@ -3,5 +3,6 @@
 #
 
 obj-$(CONFIG_IBMVETH) += ibmveth.o
+obj-$(CONFIG_IBMVNIC) += ibmvnic.o
 obj-$(CONFIG_IBM_EMAC) += emac/
 obj-$(CONFIG_EHEA) += ehea/

drivers/net/ethernet/ibm/ibmvnic.c

+/**************************************************************************/
+/*                                                                        */
+/*  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 program is free software; you can redistribute it and/or modify  */
+/*  it under the terms of the GNU General Public License as published by  */
+/*  the Free Software Foundation; either version 2 of the License, or     */
+/*  (at your option) any later version.                                   */
+/*                                                                        */
+/*  This program is distributed in the hope that it will be useful,       */
+/*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
+/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
+/*  GNU General Public License for more details.                          */
+/*                                                                        */
+/*  You should have received a copy of the GNU General Public License     */
+/*  along with this program.                                              */
+/*                                                                        */
+/* 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/in.h>
+#include <linux/ip.h>
+#include <linux/irq.h>
+#include <linux/kthread.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
+#include <linux/interrupt.h>
+#include <net/net_namespace.h>
+#include <asm/hvcall.h>
+#include <linux/atomic.h>
+#include <asm/vio.h>
+#include <asm/iommu.h>
+#include <linux/uaccess.h>
+#include <asm/firmware.h>
+#include <linux/seq_file.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 <santi_leon@yahoo.com>");
+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 int ibmvnic_remove(struct vio_dev *);
+static void release_sub_crqs(struct ibmvnic_adapter *);
+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(struct ibmvnic_adapter *adapter, u64 remote_handle,
+		       union sub_crq *sub_crq);
+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 void send_map_query(struct ibmvnic_adapter *adapter);
+static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
+static void send_request_unmap(struct ibmvnic_adapter *, u8);
+
+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 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;
+}
+
+/* net_device_ops functions */
+
+static void init_rx_pool(struct ibmvnic_adapter *adapter,
+			 struct ibmvnic_rx_pool *rx_pool, int num, int index,
+			 int buff_size, int active)
+{
+	netdev_dbg(adapter->netdev,
+		   "Initializing rx_pool %d, %d buffs, %d bytes each\n",
+		   index, num, buff_size);
+	rx_pool->size = num;
+	rx_pool->index = index;
+	rx_pool->buff_size = buff_size;
+	rx_pool->active = active;
+}
+
+static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
+				struct ibmvnic_long_term_buff *ltb, int size)
+{
+	struct device *dev = &adapter->vdev->dev;
+
+	ltb->size = size;
+	ltb->buff = dma_alloc_coherent(dev, ltb->size, &ltb->addr,
+				       GFP_KERNEL);
+
+	if (!ltb->buff) {
+		dev_err(dev, "Couldn't alloc long term buffer\n");
+		return -ENOMEM;
+	}
+	ltb->map_id = adapter->map_id;
+	adapter->map_id++;
+	send_request_map(adapter, ltb->addr,
+			 ltb->size, ltb->map_id);
+	init_completion(&adapter->fw_done);
+	wait_for_completion(&adapter->fw_done);
+	return 0;
+}
+
+static void free_long_term_buff(struct ibmvnic_adapter *adapter,
+				struct ibmvnic_long_term_buff *ltb)
+{
+	struct device *dev = &adapter->vdev->dev;
+
+	dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
+	send_request_unmap(adapter, ltb->map_id);
+}
+
+static int alloc_rx_pool(struct ibmvnic_adapter *adapter,
+			 struct ibmvnic_rx_pool *pool)
+{
+	struct device *dev = &adapter->vdev->dev;
+	int i;
+
+	pool->free_map = kcalloc(pool->size, sizeof(int), GFP_KERNEL);
+	if (!pool->free_map)
+		return -ENOMEM;
+
+	pool->rx_buff = kcalloc(pool->size, sizeof(struct ibmvnic_rx_buff),
+				GFP_KERNEL);
+
+	if (!pool->rx_buff) {
+		dev_err(dev, "Couldn't alloc rx buffers\n");
+		kfree(pool->free_map);
+		return -ENOMEM;
+	}
+
+	if (alloc_long_term_buff(adapter, &pool->long_term_buff,
+				 pool->size * pool->buff_size)) {
+		kfree(pool->free_map);
+		kfree(pool->rx_buff);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < pool->size; ++i)
+		pool->free_map[i] = i;
+
+	atomic_set(&pool->available, 0);
+	pool->next_alloc = 0;
+	pool->next_free = 0;
+
+	return 0;
+}
+
+static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
+			      struct ibmvnic_rx_pool *pool)
+{
+	int count = pool->size - atomic_read(&pool->available);
+	struct device *dev = &adapter->vdev->dev;
+	int buffers_added = 0;
+	unsigned long lpar_rc;
+	union sub_crq sub_crq;
+	struct sk_buff *skb;
+	unsigned int offset;
+	dma_addr_t dma_addr;
+	unsigned char *dst;
+	u64 *handle_array;
+	int shift = 0;
+	int index;
+	int i;
+
+	handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+				      be32_to_cpu(adapter->login_rsp_buf->
+				      off_rxadd_subcrqs));
+
+	for (i = 0; i < count; ++i) {
+		skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
+		if (!skb) {
+			dev_err(dev, "Couldn't replenish rx buff\n");
+			adapter->replenish_no_mem++;
+			break;
+		}
+
+		index = pool->free_map[pool->next_free];
+
+		if (pool->rx_buff[index].skb)
+			dev_err(dev, "Inconsistent free_map!\n");
+
+		/* Copy the skb to the long term mapped DMA buffer */
+		offset = index * pool->buff_size;
+		dst = pool->long_term_buff.buff + offset;
+		memset(dst, 0, pool->buff_size);
+		dma_addr = pool->long_term_buff.addr + offset;
+		pool->rx_buff[index].data = dst;
+
+		pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
+		pool->rx_buff[index].dma = dma_addr;
+		pool->rx_buff[index].skb = skb;
+		pool->rx_buff[index].pool_index = pool->index;
+		pool->rx_buff[index].size = pool->buff_size;
+
+		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[index]);
+		sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
+		sub_crq.rx_add.map_id = pool->long_term_buff.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);
+
+		lpar_rc = send_subcrq(adapter, handle_array[pool->index],
+				      &sub_crq);
+		if (lpar_rc != H_SUCCESS)
+			goto failure;
+
+		buffers_added++;
+		adapter->replenish_add_buff_success++;
+		pool->next_free = (pool->next_free + 1) % pool->size;
+	}
+	atomic_add(buffers_added, &pool->available);
+	return;
+
+failure:
+	dev_info(dev, "replenish pools failure\n");
+	pool->free_map[pool->next_free] = index;
+	pool->rx_buff[index].skb = NULL;
+	if (!dma_mapping_error(dev, dma_addr))
+		dma_unmap_single(dev, dma_addr, pool->buff_size,
+				 DMA_FROM_DEVICE);
+
+	dev_kfree_skb_any(skb);
+	adapter->replenish_add_buff_failure++;
+	atomic_add(buffers_added, &pool->available);
+}
+
+static void replenish_pools(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	if (adapter->migrated)
+		return;
+
+	adapter->replenish_task_cycles++;
+	for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+	     i++) {
+		if (adapter->rx_pool[i].active)
+			replenish_rx_pool(adapter, &adapter->rx_pool[i]);
+	}
+}
+
+static void free_rx_pool(struct ibmvnic_adapter *adapter,
+			 struct ibmvnic_rx_pool *pool)
+{
+	int i;
+
+	kfree(pool->free_map);
+	pool->free_map = NULL;
+
+	if (!pool->rx_buff)
+		return;
+
+	for (i = 0; i < pool->size; i++) {
+		if (pool->rx_buff[i].skb) {
+			dev_kfree_skb_any(pool->rx_buff[i].skb);
+			pool->rx_buff[i].skb = NULL;
+		}
+	}
+	kfree(pool->rx_buff);
+	pool->rx_buff = NULL;
+}
+
+static int ibmvnic_open(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_tx_pool *tx_pool;
+	union ibmvnic_crq crq;
+	int rxadd_subcrqs;
+	u64 *size_array;
+	int tx_subcrqs;
+	int i, j;
+
+	rxadd_subcrqs =
+	    be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+	tx_subcrqs =
+	    be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
+	size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+				  be32_to_cpu(adapter->login_rsp_buf->
+					      off_rxadd_buff_size));
+	adapter->map_id = 1;
+	adapter->napi = kcalloc(adapter->req_rx_queues,
+				sizeof(struct napi_struct), GFP_KERNEL);
+	if (!adapter->napi)
+		goto alloc_napi_failed;
+	for (i = 0; i < adapter->req_rx_queues; i++) {
+		netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll,
+			       NAPI_POLL_WEIGHT);
+		napi_enable(&adapter->napi[i]);
+	}
+	adapter->rx_pool =
+	    kcalloc(rxadd_subcrqs, sizeof(struct ibmvnic_rx_pool), GFP_KERNEL);
+
+	if (!adapter->rx_pool)
+		goto rx_pool_arr_alloc_failed;
+	send_map_query(adapter);
+	for (i = 0; i < rxadd_subcrqs; i++) {
+		init_rx_pool(adapter, &adapter->rx_pool[i],
+			     IBMVNIC_BUFFS_PER_POOL, i,
+			     be64_to_cpu(size_array[i]), 1);
+		if (alloc_rx_pool(adapter, &adapter->rx_pool[i])) {
+			dev_err(dev, "Couldn't alloc rx pool\n");
+			goto rx_pool_alloc_failed;
+		}
+	}
+	adapter->tx_pool =
+	    kcalloc(tx_subcrqs, sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
+
+	if (!adapter->tx_pool)
+		goto tx_pool_arr_alloc_failed;
+	for (i = 0; i < tx_subcrqs; i++) {
+		tx_pool = &adapter->tx_pool[i];
+		tx_pool->tx_buff =
+		    kcalloc(adapter->max_tx_entries_per_subcrq,
+			    sizeof(struct ibmvnic_tx_buff), GFP_KERNEL);
+		if (!tx_pool->tx_buff)
+			goto tx_pool_alloc_failed;
+
+		if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
+					 adapter->max_tx_entries_per_subcrq *
+					 adapter->req_mtu))
+			goto tx_ltb_alloc_failed;
+
+		tx_pool->free_map =
+		    kcalloc(adapter->max_tx_entries_per_subcrq,
+			    sizeof(int), GFP_KERNEL);
+		if (!tx_pool->free_map)
+			goto tx_fm_alloc_failed;
+
+		for (j = 0; j < adapter->max_tx_entries_per_subcrq; j++)
+			tx_pool->free_map[j] = j;
+
+		tx_pool->consumer_index = 0;
+		tx_pool->producer_index = 0;
+	}
+	adapter->bounce_buffer_size =
+	    (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
+	adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
+					 GFP_KERNEL);
+	if (!adapter->bounce_buffer)
+		goto bounce_alloc_failed;
+
+	adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
+						    adapter->bounce_buffer_size,
+						    DMA_TO_DEVICE);
+	if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
+		dev_err(dev, "Couldn't map tx bounce buffer\n");
+		goto bounce_map_failed;
+	}
+	replenish_pools(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++)
+		enable_scrq_irq(adapter, adapter->rx_scrq[i]);
+
+	for (i = 0; i < adapter->req_tx_queues; i++)
+		enable_scrq_irq(adapter, adapter->tx_scrq[i]);
+
+	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 = IBMVNIC_LOGICAL_LNK_UP;
+	ibmvnic_send_crq(adapter, &crq);
+
+	netif_start_queue(netdev);
+	return 0;
+
+bounce_map_failed:
+	kfree(adapter->bounce_buffer);
+bounce_alloc_failed:
+	i = tx_subcrqs - 1;
+	kfree(adapter->tx_pool[i].free_map);
+tx_fm_alloc_failed:
+	free_long_term_buff(adapter, &adapter->tx_pool[i].long_term_buff);
+tx_ltb_alloc_failed:
+	kfree(adapter->tx_pool[i].tx_buff);
+tx_pool_alloc_failed:
+	for (j = 0; j < i; j++) {
+		kfree(adapter->tx_pool[j].tx_buff);
+		free_long_term_buff(adapter,
+				    &adapter->tx_pool[j].long_term_buff);
+		kfree(adapter->tx_pool[j].free_map);
+	}
+	kfree(adapter->tx_pool);
+	adapter->tx_pool = NULL;
+tx_pool_arr_alloc_failed:
+	i = rxadd_subcrqs;
+rx_pool_alloc_failed:
+	for (j = 0; j < i; j++) {
+		free_rx_pool(adapter, &adapter->rx_pool[j]);
+		free_long_term_buff(adapter,
+				    &adapter->rx_pool[j].long_term_buff);
+	}
+	kfree(adapter->rx_pool);
+	adapter->rx_pool = NULL;
+rx_pool_arr_alloc_failed:
+	for (i = 0; i < adapter->req_rx_queues; i++)
+		napi_enable(&adapter->napi[i]);
+alloc_napi_failed:
+	return -ENOMEM;
+}
+
+static int ibmvnic_close(struct net_device *netdev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct device *dev = &adapter->vdev->dev;
+	union ibmvnic_crq crq;
+	int i;
+
+	adapter->closing = true;
+
+	for (i = 0; i < adapter->req_rx_queues; i++)
+		napi_disable(&adapter->napi[i]);
+
+	netif_stop_queue(netdev);
+
+	if (adapter->bounce_buffer) {
+		if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
+			dma_unmap_single(&adapter->vdev->dev,
+					 adapter->bounce_buffer_dma,
+					 adapter->bounce_buffer_size,
+					 DMA_BIDIRECTIONAL);
+			adapter->bounce_buffer_dma = DMA_ERROR_CODE;
+		}
+		kfree(adapter->bounce_buffer);
+		adapter->bounce_buffer = NULL;
+	}
+
+	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 = IBMVNIC_LOGICAL_LNK_DN;
+	ibmvnic_send_crq(adapter, &crq);
+
+	for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
+	     i++) {
+		kfree(adapter->tx_pool[i].tx_buff);
+		free_long_term_buff(adapter,
+				    &adapter->tx_pool[i].long_term_buff);
+		kfree(adapter->tx_pool[i].free_map);
+	}
+	kfree(adapter->tx_pool);
+	adapter->tx_pool = NULL;
+
+	for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+	     i++) {
+		free_rx_pool(adapter, &adapter->rx_pool[i]);
+		free_long_term_buff(adapter,
+				    &adapter->rx_pool[i].long_term_buff);
+	}
+	kfree(adapter->rx_pool);
+	adapter->rx_pool = NULL;
+
+	adapter->closing = false;
+
+	return 0;
+}
+
+static int 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);
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_tx_buff *tx_buff = NULL;
+	struct ibmvnic_tx_pool *tx_pool;
+	unsigned int tx_send_failed = 0;
+	unsigned int tx_map_failed = 0;
+	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;
+	bool used_bounce = false;
+	unsigned long lpar_rc;
+	union sub_crq tx_crq;
+	unsigned int offset;
+	unsigned char *dst;
+	u64 *handle_array;
+	int index = 0;
+	int ret = 0;
+
+	tx_pool = &adapter->tx_pool[queue_num];
+	txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
+	handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+				   be32_to_cpu(adapter->login_rsp_buf->
+					       off_txsubm_subcrqs));
+	if (adapter->migrated) {
+		tx_send_failed++;
+		tx_dropped++;
+		ret = NETDEV_TX_BUSY;
+		goto out;
+	}
+
+	index = tx_pool->free_map[tx_pool->consumer_index];
+	offset = index * adapter->req_mtu;
+	dst = tx_pool->long_term_buff.buff + offset;
+	memset(dst, 0, adapter->req_mtu);
+	skb_copy_from_linear_data(skb, dst, skb->len);
+	data_dma_addr = tx_pool->long_term_buff.addr + offset;
+
+	tx_pool->consumer_index =
+	    (tx_pool->consumer_index + 1) %
+		adapter->max_tx_entries_per_subcrq;
+
+	tx_buff = &tx_pool->tx_buff[index];
+	tx_buff->skb = skb;
+	tx_buff->data_dma[0] = data_dma_addr;
+	tx_buff->data_len[0] = skb->len;
+	tx_buff->index = index;
+	tx_buff->pool_index = queue_num;
+	tx_buff->last_frag = true;
+	tx_buff->used_bounce = used_bounce;
+
+	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;
+	tx_crq.v1.correlator = cpu_to_be32(index);
+	tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.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) {
+		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)) {
+		if (ip_hdr(skb)->version == 4)
+			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
+		else if (ip_hdr(skb)->version == 6)
+			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
+
+		if (ip_hdr(skb)->protocol == IPPROTO_TCP)
+			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
+		else if (ip_hdr(skb)->protocol != IPPROTO_TCP)
+			tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
+	}
+
+	if (skb->ip_summed == CHECKSUM_PARTIAL)
+		tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
+
+	lpar_rc = send_subcrq(adapter, handle_array[0], &tx_crq);
+
+	if (lpar_rc != H_SUCCESS) {
+		dev_err(dev, "tx failed with code %ld\n", lpar_rc);
+
+		if (tx_pool->consumer_index == 0)
+			tx_pool->consumer_index =
+				adapter->max_tx_entries_per_subcrq - 1;
+		else
+			tx_pool->consumer_index--;
+
+		tx_send_failed++;
+		tx_dropped++;
+		ret = NETDEV_TX_BUSY;
+		goto out;
+	}
+	tx_packets++;
+	tx_bytes += skb->len;
+	txq->trans_start = jiffies;
+	ret = NETDEV_TX_OK;
+
+out:
+	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;
+
+	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, void *p)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct sockaddr *addr = p;
+	union ibmvnic_crq crq;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	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], addr->sa_data);
+	ibmvnic_send_crq(adapter, &crq);
+	/* netdev->dev_addr is changed in handle_change_mac_rsp function */
+	return 0;
+}
+
+static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu)
+		return -EINVAL;
+
+	netdev->mtu = new_mtu;
+	return 0;
+}
+
+static void ibmvnic_tx_timeout(struct net_device *dev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(dev);
+	int rc;
+
+	/* Adapter timed out, resetting it */
+	release_sub_crqs(adapter);
+	rc = ibmvnic_reset_crq(adapter);
+	if (rc)
+		dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n");
+	else
+		ibmvnic_send_crq_init(adapter);
+}
+
+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 net_device *netdev = napi->dev;
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	int scrq_num = (int)(napi - adapter->napi);
+	int frames_processed = 0;
+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 (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
+			break;
+		next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
+		rx_buff =
+		    (struct ibmvnic_rx_buff *)be64_to_cpu(next->
+							  rx_comp.correlator);
+		/* do error checking */
+		if (next->rx_comp.rc) {
+			netdev_err(netdev, "rx error %x\n", next->rx_comp.rc);
+			/* free the entry */
+			next->rx_comp.first = 0;
+			remove_buff_from_pool(adapter, rx_buff);
+			break;
+		}
+
+		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;
+		skb_copy_to_linear_data(skb, rx_buff->data + offset,
+					length);
+		skb->vlan_tci = be16_to_cpu(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);
+
+		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;
+		frames_processed++;
+	}
+	replenish_pools(adapter);
+
+	if (frames_processed < budget) {
+		enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
+		napi_complete(napi);
+		if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
+		    napi_reschedule(napi)) {
+			disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
+			goto restart_poll;
+		}
+	}
+	return frames_processed;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void ibmvnic_netpoll_controller(struct net_device *dev)
+{
+	struct ibmvnic_adapter *adapter = netdev_priv(dev);
+	int i;
+
+	replenish_pools(netdev_priv(dev));
+	for (i = 0; i < adapter->req_rx_queues; i++)
+		ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
+				     adapter->rx_scrq[i]);
+}
+#endif
+
+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_change_mtu		= ibmvnic_change_mtu,
+	.ndo_tx_timeout		= ibmvnic_tx_timeout,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller	= ibmvnic_netpoll_controller,
+#endif
+};
+
+/* ethtool functions */
+
+static int ibmvnic_get_settings(struct net_device *netdev,
+				struct ethtool_cmd *cmd)
+{
+	cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
+			  SUPPORTED_FIBRE);
+	cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
+			    ADVERTISED_FIBRE);
+	ethtool_cmd_speed_set(cmd, SPEED_1000);
+	cmd->duplex = DUPLEX_FULL;
+	cmd->port = PORT_FIBRE;
+	cmd->phy_address = 0;
+	cmd->transceiver = XCVR_INTERNAL;
+	cmd->autoneg = AUTONEG_ENABLE;
+	cmd->maxtxpkt = 0;
+	cmd->maxrxpkt = 1;
+	return 0;
+}
+
+static void ibmvnic_get_drvinfo(struct net_device *dev,
+				struct ethtool_drvinfo *info)
+{
+	strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
+	strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->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)
+{
+	ring->rx_max_pending = 0;
+	ring->tx_max_pending = 0;
+	ring->rx_mini_max_pending = 0;
+	ring->rx_jumbo_max_pending = 0;
+	ring->rx_pending = 0;
+	ring->tx_pending = 0;
+	ring->rx_mini_pending = 0;
+	ring->rx_jumbo_pending = 0;
+}
+
+static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+	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);
+}
+
+static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
+{
+	switch (sset) {
+	case ETH_SS_STATS:
+		return ARRAY_SIZE(ibmvnic_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;
+
+	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));
+	ibmvnic_send_crq(adapter, &crq);
+
+	/* Wait for data to be written */
+	init_completion(&adapter->stats_done);
+	wait_for_completion(&adapter->stats_done);
+
+	for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
+		data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset);
+}
+
+static const struct ethtool_ops ibmvnic_ethtool_ops = {
+	.get_settings		= ibmvnic_get_settings,
+	.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,
+	.get_strings            = ibmvnic_get_strings,
+	.get_sset_count         = ibmvnic_get_sset_count,
+	.get_ethtool_stats	= ibmvnic_get_ethtool_stats,
+};
+
+/* Routines for managing CRQs/sCRQs  */
+
+static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
+				  struct ibmvnic_sub_crq_queue *scrq)
+{
+	struct device *dev = &adapter->vdev->dev;
+	long rc;
+
+	netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
+
+	/* 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));
+
+	dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
+			 DMA_BIDIRECTIONAL);
+	free_pages((unsigned long)scrq->msgs, 2);
+	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 = kmalloc(sizeof(*scrq), GFP_ATOMIC);
+	if (!scrq)
+		return NULL;
+
+	scrq->msgs = (union sub_crq *)__get_free_pages(GFP_KERNEL, 2);
+	memset(scrq->msgs, 0, 4 * PAGE_SIZE);
+	if (!scrq->msgs) {
+		dev_warn(dev, "Couldn't allocate crq queue messages page\n");
+		goto zero_page_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->irq = irq_create_mapping(NULL, scrq->hw_irq);
+	if (scrq->irq == NO_IRQ) {
+		dev_err(dev, "Error mapping irq\n");
+		goto map_irq_failed;
+	}
+
+	scrq->adapter = adapter;
+	scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
+	scrq->cur = 0;
+	scrq->rx_skb_top = NULL;
+	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;
+
+map_irq_failed:
+	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));
+reg_failed:
+	dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
+			 DMA_BIDIRECTIONAL);
+map_failed:
+	free_pages((unsigned long)scrq->msgs, 2);
+zero_page_failed:
+	kfree(scrq);
+
+	return NULL;
+}
+
+static void release_sub_crqs(struct ibmvnic_adapter *adapter)
+{
+	int i;
+
+	if (adapter->tx_scrq) {
+		for (i = 0; i < adapter->req_tx_queues; i++)
+			if (adapter->tx_scrq[i]) {
+				free_irq(adapter->tx_scrq[i]->irq,
+					 adapter->tx_scrq[i]);
+				release_sub_crq_queue(adapter,
+						      adapter->tx_scrq[i]);
+			}
+		adapter->tx_scrq = NULL;
+	}
+
+	if (adapter->rx_scrq) {
+		for (i = 0; i < adapter->req_rx_queues; i++)
+			if (adapter->rx_scrq[i]) {
+				free_irq(adapter->rx_scrq[i]->irq,
+					 adapter->rx_scrq[i]);
+				release_sub_crq_queue(adapter,
+						      adapter->rx_scrq[i]);
+			}
+		adapter->rx_scrq = NULL;
+	}
+
+	adapter->requested_caps = 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;
+}
+
+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;
+	}
+
+	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_buff *txbuff;
+	union sub_crq *next;
+	int index;
+	int i, j;
+
+restart_loop:
+	while (pending_scrq(adapter, scrq)) {
+		unsigned int pool = scrq->pool_index;
+
+		next = ibmvnic_next_scrq(adapter, scrq);
+		for (i = 0; i < next->tx_comp.num_comps; i++) {
+			if (next->tx_comp.rcs[i]) {
+				dev_err(dev, "tx error %x\n",
+					next->tx_comp.rcs[i]);
+				continue;
+			}
+			index = be32_to_cpu(next->tx_comp.correlators[i]);
+			txbuff = &adapter->tx_pool[pool].tx_buff[index];
+
+			for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
+				if (!txbuff->data_dma[j])
+					continue;
+
+				txbuff->data_dma[j] = 0;
+				txbuff->used_bounce = false;
+			}
+
+			if (txbuff->last_frag)
+				dev_kfree_skb_any(txbuff->skb);
+
+			adapter->tx_pool[pool].free_map[adapter->tx_pool[pool].
+						     producer_index] = index;
+			adapter->tx_pool[pool].producer_index =
+			    (adapter->tx_pool[pool].producer_index + 1) %
+			    adapter->max_tx_entries_per_subcrq;
+		}
+		/* remove tx_comp scrq*/
+		next->tx_comp.first = 0;
+	}
+
+	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;
+
+	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 void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_sub_crq_queue **allqueues;
+	int registered_queues = 0;
+	union ibmvnic_crq crq;
+	int total_queues;
+	int more = 0;
+	int i, j;
+	int rc;
+
+	if (!retry) {
+		/* Sub-CRQ entries are 32 byte long */
+		int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
+
+		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");
+			goto allqueues_failed;
+		}
+
+		/* Get the minimum between the queried max and the entries
+		 * that fit in our PAGE_SIZE
+		 */
+		adapter->req_tx_entries_per_subcrq =
+		    adapter->max_tx_entries_per_subcrq > entries_page ?
+		    entries_page : adapter->max_tx_entries_per_subcrq;
+		adapter->req_rx_add_entries_per_subcrq =
+		    adapter->max_rx_add_entries_per_subcrq > entries_page ?
+		    entries_page : adapter->max_rx_add_entries_per_subcrq;
+
+		/* Choosing the maximum number of queues supported by firmware*/
+		adapter->req_tx_queues = adapter->min_tx_queues;
+		adapter->req_rx_queues = adapter->min_rx_queues;
+		adapter->req_rx_add_queues = adapter->min_rx_add_queues;
+
+		adapter->req_mtu = adapter->max_mtu;
+	}
+
+	total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
+
+	allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC);
+	if (!allqueues)
+		goto allqueues_failed;
+
+	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_ATOMIC);
+	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;
+		rc = request_irq(adapter->tx_scrq[i]->irq, ibmvnic_interrupt_tx,
+				 0, "ibmvnic_tx", adapter->tx_scrq[i]);
+		if (rc) {
+			dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
+				adapter->tx_scrq[i]->irq, rc);
+			goto req_tx_irq_failed;
+		}
+	}
+
+	adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
+				   sizeof(*adapter->rx_scrq), GFP_ATOMIC);
+	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;
+		rc = request_irq(adapter->rx_scrq[i]->irq, ibmvnic_interrupt_rx,
+				 0, "ibmvnic_rx", adapter->rx_scrq[i]);
+		if (rc) {
+			dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
+				adapter->rx_scrq[i]->irq, rc);
+			goto req_rx_irq_failed;
+		}
+	}
+
+	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_be32(adapter->req_tx_queues);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
+	crq.request_capability.number = cpu_to_be32(adapter->req_rx_queues);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
+	crq.request_capability.number = cpu_to_be32(adapter->req_rx_add_queues);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability =
+	    cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
+	crq.request_capability.number =
+	    cpu_to_be32(adapter->req_tx_entries_per_subcrq);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability =
+	    cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
+	crq.request_capability.number =
+	    cpu_to_be32(adapter->req_rx_add_entries_per_subcrq);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.request_capability.capability = cpu_to_be16(REQ_MTU);
+	crq.request_capability.number = cpu_to_be32(adapter->req_mtu);
+	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_be32(1);
+			ibmvnic_send_crq(adapter, &crq);
+		}
+	} else {
+		crq.request_capability.capability =
+		    cpu_to_be16(PROMISC_REQUESTED);
+		crq.request_capability.number = cpu_to_be32(0);
+		ibmvnic_send_crq(adapter, &crq);
+	}
+
+	kfree(allqueues);
+
+	return;
+
+req_rx_irq_failed:
+	for (j = 0; j < i; j++)
+		free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
+	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]);
+	kfree(adapter->rx_scrq);
+	adapter->rx_scrq = NULL;
+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]);
+	kfree(allqueues);
+allqueues_failed:
+	ibmvnic_remove(adapter->vdev);
+}
+
+static int pending_scrq(struct ibmvnic_adapter *adapter,
+			struct ibmvnic_sub_crq_queue *scrq)
+{
+	union sub_crq *entry = &scrq->msgs[scrq->cur];
+
+	if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing)
+		return 1;
+	else
+		return 0;
+}
+
+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);
+
+	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 int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
+		       union sub_crq *sub_crq)
+{
+	unsigned int ua = adapter->vdev->unit_address;
+	struct device *dev = &adapter->vdev->dev;
+	u64 *u64_crq = (u64 *)sub_crq;
+	int rc;
+
+	netdev_dbg(adapter->netdev,
+		   "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
+		   (unsigned long int)cpu_to_be64(remote_handle),
+		   (unsigned long int)cpu_to_be64(u64_crq[0]),
+		   (unsigned long int)cpu_to_be64(u64_crq[1]),
+		   (unsigned long int)cpu_to_be64(u64_crq[2]),
+		   (unsigned long int)cpu_to_be64(u64_crq[3]));
+
+	/* Make sure the hypervisor sees the complete request */
+	mb();
+
+	rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
+				cpu_to_be64(remote_handle),
+				cpu_to_be64(u64_crq[0]),
+				cpu_to_be64(u64_crq[1]),
+				cpu_to_be64(u64_crq[2]),
+				cpu_to_be64(u64_crq[3]));
+
+	if (rc) {
+		if (rc == H_CLOSED)
+			dev_warn(dev, "CRQ Queue closed\n");
+		dev_err(dev, "Send error (rc=%d)\n", rc);
+	}
+
+	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 int)cpu_to_be64(u64_crq[0]),
+		   (unsigned long int)cpu_to_be64(u64_crq[1]));
+
+	/* Make sure the hypervisor sees the complete request */
+	mb();
+
+	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");
+		dev_warn(dev, "Send error (rc=%d)\n", rc);
+	}
+
+	return rc;
+}
+
+static int ibmvnic_send_crq_init(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;
+	netdev_dbg(adapter->netdev, "Sending CRQ init\n");
+
+	return ibmvnic_send_crq(adapter, &crq);
+}
+
+static int ibmvnic_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;
+	netdev_dbg(adapter->netdev, "Sending CRQ init complete\n");
+
+	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 send_login(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
+	struct ibmvnic_login_buffer *login_buffer;
+	struct ibmvnic_inflight_cmd *inflight_cmd;
+	struct device *dev = &adapter->vdev->dev;
+	dma_addr_t rsp_buffer_token;
+	dma_addr_t buffer_token;
+	size_t rsp_buffer_size;
+	union ibmvnic_crq crq;
+	unsigned long flags;
+	size_t buffer_size;
+	__be64 *tx_list_p;
+	__be64 *rx_list_p;
+	int i;
+
+	buffer_size =
+	    sizeof(struct ibmvnic_login_buffer) +
+	    sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues);
+
+	login_buffer = kmalloc(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 +
+			   adapter->req_rx_queues *
+			   adapter->req_rx_add_queues + adapter->
+			   req_rx_add_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;
+	}
+	inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
+	if (!inflight_cmd) {
+		dev_err(dev, "Couldn't allocate inflight_cmd\n");
+		goto inflight_alloc_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);
+		}
+	}
+
+	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 int *)(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);
+
+	memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
+
+	spin_lock_irqsave(&adapter->inflight_lock, flags);
+	list_add_tail(&inflight_cmd->list, &adapter->inflight);
+	spin_unlock_irqrestore(&adapter->inflight_lock, flags);
+
+	ibmvnic_send_crq(adapter, &crq);
+
+	return;
+
+inflight_alloc_failed:
+	dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
+			 DMA_FROM_DEVICE);
+buf_rsp_map_failed:
+	kfree(login_rsp_buffer);
+buf_rsp_alloc_failed:
+	dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
+buf_map_failed:
+	kfree(login_buffer);
+buf_alloc_failed:
+	return;
+}
+
+static void 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);
+	ibmvnic_send_crq(adapter, &crq);
+}
+
+static void 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;
+	ibmvnic_send_crq(adapter, &crq);
+}
+
+static void send_map_query(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_cap_queries(struct ibmvnic_adapter *adapter)
+{
+	union ibmvnic_crq crq;
+
+	atomic_set(&adapter->running_cap_queries, 0);
+	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);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability =
+	    cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability =
+	    cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability =
+	    cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability =
+	    cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MIN_MTU);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MAX_MTU);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability =
+			cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability =
+			cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability =
+			cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+
+	crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
+	atomic_inc(&adapter->running_cap_queries);
+	ibmvnic_send_crq(adapter, &crq);
+}
+
+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;
+	union ibmvnic_crq crq;
+	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 int *)(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);
+
+	adapter->ip_offload_ctrl_tok =
+	    dma_map_single(dev, &adapter->ip_offload_ctrl,
+			   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;
+	}
+
+	adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
+	adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
+	adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
+	adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
+	adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
+
+	/* large_tx/rx disabled for now, additional features needed */
+	adapter->ip_offload_ctrl.large_tx_ipv4 = 0;
+	adapter->ip_offload_ctrl.large_tx_ipv6 = 0;
+	adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
+	adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
+
+	adapter->netdev->features = NETIF_F_GSO;
+
+	if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
+		adapter->netdev->features |= NETIF_F_IP_CSUM;
+
+	if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
+		adapter->netdev->features |= NETIF_F_IPV6_CSUM;
+
+	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_error_info_rsp(union ibmvnic_crq *crq,
+				  struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_error_buff *error_buff;
+	unsigned long flags;
+	bool found = false;
+	int i;
+
+	if (!crq->request_error_rsp.rc.code) {
+		dev_info(dev, "Request Error Rsp returned with rc=%x\n",
+			 crq->request_error_rsp.rc.code);
+		return;
+	}
+
+	spin_lock_irqsave(&adapter->error_list_lock, flags);
+	list_for_each_entry(error_buff, &adapter->errors, list)
+		if (error_buff->error_id == crq->request_error_rsp.error_id) {
+			found = true;
+			list_del(&error_buff->list);
+			break;
+		}
+	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
+
+	if (!found) {
+		dev_err(dev, "Couldn't find error id %x\n",
+			crq->request_error_rsp.error_id);
+		return;
+	}
+
+	dev_err(dev, "Detailed info for error id %x:",
+		crq->request_error_rsp.error_id);
+
+	for (i = 0; i < error_buff->len; i++) {
+		pr_cont("%02x", (int)error_buff->buff[i]);
+		if (i % 8 == 7)
+			pr_cont(" ");
+	}
+	pr_cont("\n");
+
+	dma_unmap_single(dev, error_buff->dma, error_buff->len,
+			 DMA_FROM_DEVICE);
+	kfree(error_buff->buff);
+	kfree(error_buff);
+}
+
+static void handle_dump_size_rsp(union ibmvnic_crq *crq,
+				 struct ibmvnic_adapter *adapter)
+{
+	int len = be32_to_cpu(crq->request_dump_size_rsp.len);
+	struct ibmvnic_inflight_cmd *inflight_cmd;
+	struct device *dev = &adapter->vdev->dev;
+	union ibmvnic_crq newcrq;
+	unsigned long flags;
+
+	/* allocate and map buffer */
+	adapter->dump_data = kmalloc(len, GFP_KERNEL);
+	if (!adapter->dump_data) {
+		complete(&adapter->fw_done);
+		return;
+	}
+
+	adapter->dump_data_token = dma_map_single(dev, adapter->dump_data, len,
+						  DMA_FROM_DEVICE);
+
+	if (dma_mapping_error(dev, adapter->dump_data_token)) {
+		if (!firmware_has_feature(FW_FEATURE_CMO))
+			dev_err(dev, "Couldn't map dump data\n");
+		kfree(adapter->dump_data);
+		complete(&adapter->fw_done);
+		return;
+	}
+
+	inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
+	if (!inflight_cmd) {
+		dma_unmap_single(dev, adapter->dump_data_token, len,
+				 DMA_FROM_DEVICE);
+		kfree(adapter->dump_data);
+		complete(&adapter->fw_done);
+		return;
+	}
+
+	memset(&newcrq, 0, sizeof(newcrq));
+	newcrq.request_dump.first = IBMVNIC_CRQ_CMD;
+	newcrq.request_dump.cmd = REQUEST_DUMP;
+	newcrq.request_dump.ioba = cpu_to_be32(adapter->dump_data_token);
+	newcrq.request_dump.len = cpu_to_be32(adapter->dump_data_size);
+
+	memcpy(&inflight_cmd->crq, &newcrq, sizeof(newcrq));
+
+	spin_lock_irqsave(&adapter->inflight_lock, flags);
+	list_add_tail(&inflight_cmd->list, &adapter->inflight);
+	spin_unlock_irqrestore(&adapter->inflight_lock, flags);
+
+	ibmvnic_send_crq(adapter, &newcrq);
+}
+
+static void handle_error_indication(union ibmvnic_crq *crq,
+				    struct ibmvnic_adapter *adapter)
+{
+	int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz);
+	struct ibmvnic_inflight_cmd *inflight_cmd;
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_error_buff *error_buff;
+	union ibmvnic_crq new_crq;
+	unsigned long flags;
+
+	dev_err(dev, "Firmware reports %serror id %x, cause %d\n",
+		crq->error_indication.
+		    flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
+		crq->error_indication.error_id,
+		crq->error_indication.error_cause);
+
+	error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC);
+	if (!error_buff)
+		return;
+
+	error_buff->buff = kmalloc(detail_len, GFP_ATOMIC);
+	if (!error_buff->buff) {
+		kfree(error_buff);
+		return;
+	}
+
+	error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len,
+					 DMA_FROM_DEVICE);
+	if (dma_mapping_error(dev, error_buff->dma)) {
+		if (!firmware_has_feature(FW_FEATURE_CMO))
+			dev_err(dev, "Couldn't map error buffer\n");
+		kfree(error_buff->buff);
+		kfree(error_buff);
+		return;
+	}
+
+	inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC);
+	if (!inflight_cmd) {
+		dma_unmap_single(dev, error_buff->dma, detail_len,
+				 DMA_FROM_DEVICE);
+		kfree(error_buff->buff);
+		kfree(error_buff);
+		return;
+	}
+
+	error_buff->len = detail_len;
+	error_buff->error_id = crq->error_indication.error_id;
+
+	spin_lock_irqsave(&adapter->error_list_lock, flags);
+	list_add_tail(&error_buff->list, &adapter->errors);
+	spin_unlock_irqrestore(&adapter->error_list_lock, flags);
+
+	memset(&new_crq, 0, sizeof(new_crq));
+	new_crq.request_error_info.first = IBMVNIC_CRQ_CMD;
+	new_crq.request_error_info.cmd = REQUEST_ERROR_INFO;
+	new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma);
+	new_crq.request_error_info.len = cpu_to_be32(detail_len);
+	new_crq.request_error_info.error_id = crq->error_indication.error_id;
+
+	memcpy(&inflight_cmd->crq, &crq, sizeof(crq));
+
+	spin_lock_irqsave(&adapter->inflight_lock, flags);
+	list_add_tail(&inflight_cmd->list, &adapter->inflight);
+	spin_unlock_irqrestore(&adapter->inflight_lock, flags);
+
+	ibmvnic_send_crq(adapter, &new_crq);
+}
+
+static void 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);
+		return;
+	}
+	memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
+	       ETH_ALEN);
+}
+
+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;
+
+	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 int)be32_to_cpu(crq->request_capability_rsp.
+					       number), name);
+		release_sub_crqs(adapter);
+		*req_value = be32_to_cpu(crq->request_capability_rsp.number);
+		complete(&adapter->init_done);
+		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 (++adapter->requested_caps == 7) {
+		union ibmvnic_crq newcrq;
+		int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
+		struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
+		    &adapter->ip_offload_buf;
+
+		adapter->ip_offload_tok = dma_map_single(dev, 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(&newcrq, 0, sizeof(newcrq));
+		newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
+		newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
+		newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
+		newcrq.query_ip_offload.ioba =
+		    cpu_to_be32(adapter->ip_offload_tok);
+
+		ibmvnic_send_crq(adapter, &newcrq);
+	}
+}
+
+static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
+			    struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
+	struct ibmvnic_login_buffer *login = adapter->login_buf;
+	union ibmvnic_crq crq;
+	int i;
+
+	dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
+			 DMA_BIDIRECTIONAL);
+	dma_unmap_single(dev, adapter->login_rsp_buf_token,
+			 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL);
+
+	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 int *)(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_remove(adapter->vdev);
+		return -EIO;
+	}
+	complete(&adapter->init_done);
+
+	memset(&crq, 0, sizeof(crq));
+	crq.request_ras_comp_num.first = IBMVNIC_CRQ_CMD;
+	crq.request_ras_comp_num.cmd = REQUEST_RAS_COMP_NUM;
+	ibmvnic_send_crq(adapter, &crq);
+
+	return 0;
+}
+
+static void handle_request_map_rsp(union ibmvnic_crq *crq,
+				   struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	u8 map_id = crq->request_map_rsp.map_id;
+	int tx_subcrqs;
+	int rx_subcrqs;
+	long rc;
+	int i;
+
+	tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
+	rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+
+	rc = crq->request_map_rsp.rc.code;
+	if (rc) {
+		dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
+		adapter->map_id--;
+		/* need to find and zero tx/rx_pool map_id */
+		for (i = 0; i < tx_subcrqs; i++) {
+			if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
+				adapter->tx_pool[i].long_term_buff.map_id = 0;
+		}
+		for (i = 0; i < rx_subcrqs; i++) {
+			if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
+				adapter->rx_pool[i].long_term_buff.map_id = 0;
+		}
+	}
+	complete(&adapter->fw_done);
+}
+
+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 = %d\nfree_pages = %d\n",
+		   crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
+		   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_queries);
+	netdev_dbg(netdev, "Outstanding queries: %d\n",
+		   atomic_read(&adapter->running_cap_queries));
+	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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "promisc_supported = %lld\n",
+			   adapter->promisc_supported);
+		break;
+	case MIN_MTU:
+		adapter->min_mtu = be32_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
+		break;
+	case MAX_MTU:
+		adapter->max_mtu = be32_to_cpu(crq->query_capability.number);
+		netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
+		break;
+	case MAX_MULTICAST_FILTERS:
+		adapter->max_multicast_filters =
+		    be32_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 =
+		    be32_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 MAX_TX_SG_ENTRIES:
+		adapter->max_tx_sg_entries =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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 =
+		    be32_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_queries) == 0)
+		complete(&adapter->init_done);
+		/* We're done querying the capabilities, initialize sub-crqs */
+}
+
+static void handle_control_ras_rsp(union ibmvnic_crq *crq,
+				   struct ibmvnic_adapter *adapter)
+{
+	u8 correlator = crq->control_ras_rsp.correlator;
+	struct device *dev = &adapter->vdev->dev;
+	bool found = false;
+	int i;
+
+	if (crq->control_ras_rsp.rc.code) {
+		dev_warn(dev, "Control ras failed rc=%d\n",
+			 crq->control_ras_rsp.rc.code);
+		return;
+	}
+
+	for (i = 0; i < adapter->ras_comp_num; i++) {
+		if (adapter->ras_comps[i].correlator == correlator) {
+			found = true;
+			break;
+		}
+	}
+
+	if (!found) {
+		dev_warn(dev, "Correlator not found on control_ras_rsp\n");
+		return;
+	}
+
+	switch (crq->control_ras_rsp.op) {
+	case IBMVNIC_TRACE_LEVEL:
+		adapter->ras_comps[i].trace_level = crq->control_ras.level;
+		break;
+	case IBMVNIC_ERROR_LEVEL:
+		adapter->ras_comps[i].error_check_level =
+		    crq->control_ras.level;
+		break;
+	case IBMVNIC_TRACE_PAUSE:
+		adapter->ras_comp_int[i].paused = 1;
+		break;
+	case IBMVNIC_TRACE_RESUME:
+		adapter->ras_comp_int[i].paused = 0;
+		break;
+	case IBMVNIC_TRACE_ON:
+		adapter->ras_comps[i].trace_on = 1;
+		break;
+	case IBMVNIC_TRACE_OFF:
+		adapter->ras_comps[i].trace_on = 0;
+		break;
+	case IBMVNIC_CHG_TRACE_BUFF_SZ:
+		/* trace_buff_sz is 3 bytes, stuff it into an int */
+		((u8 *)(&adapter->ras_comps[i].trace_buff_size))[0] = 0;
+		((u8 *)(&adapter->ras_comps[i].trace_buff_size))[1] =
+		    crq->control_ras_rsp.trace_buff_sz[0];
+		((u8 *)(&adapter->ras_comps[i].trace_buff_size))[2] =
+		    crq->control_ras_rsp.trace_buff_sz[1];
+		((u8 *)(&adapter->ras_comps[i].trace_buff_size))[3] =
+		    crq->control_ras_rsp.trace_buff_sz[2];
+		break;
+	default:
+		dev_err(dev, "invalid op %d on control_ras_rsp",
+			crq->control_ras_rsp.op);
+	}
+}
+
+static int ibmvnic_fw_comp_open(struct inode *inode, struct file *file)
+{
+	file->private_data = inode->i_private;
+	return 0;
+}
+
+static ssize_t trace_read(struct file *file, char __user *user_buf, size_t len,
+			  loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_fw_trace_entry *trace;
+	int num = ras_comp_int->num;
+	union ibmvnic_crq crq;
+	dma_addr_t trace_tok;
+
+	if (*ppos >= be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
+		return 0;
+
+	trace =
+	    dma_alloc_coherent(dev,
+			       be32_to_cpu(adapter->ras_comps[num].
+					   trace_buff_size), &trace_tok,
+			       GFP_KERNEL);
+	if (!trace) {
+		dev_err(dev, "Couldn't alloc trace buffer\n");
+		return 0;
+	}
+
+	memset(&crq, 0, sizeof(crq));
+	crq.collect_fw_trace.first = IBMVNIC_CRQ_CMD;
+	crq.collect_fw_trace.cmd = COLLECT_FW_TRACE;
+	crq.collect_fw_trace.correlator = adapter->ras_comps[num].correlator;
+	crq.collect_fw_trace.ioba = cpu_to_be32(trace_tok);
+	crq.collect_fw_trace.len = adapter->ras_comps[num].trace_buff_size;
+	ibmvnic_send_crq(adapter, &crq);
+
+	init_completion(&adapter->fw_done);
+	wait_for_completion(&adapter->fw_done);
+
+	if (*ppos + len > be32_to_cpu(adapter->ras_comps[num].trace_buff_size))
+		len =
+		    be32_to_cpu(adapter->ras_comps[num].trace_buff_size) -
+		    *ppos;
+
+	copy_to_user(user_buf, &((u8 *)trace)[*ppos], len);
+
+	dma_free_coherent(dev,
+			  be32_to_cpu(adapter->ras_comps[num].trace_buff_size),
+			  trace, trace_tok);
+	*ppos += len;
+	return len;
+}
+
+static const struct file_operations trace_ops = {
+	.owner		= THIS_MODULE,
+	.open		= ibmvnic_fw_comp_open,
+	.read		= trace_read,
+};
+
+static ssize_t paused_read(struct file *file, char __user *user_buf, size_t len,
+			   loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	int num = ras_comp_int->num;
+	char buff[5]; /*  1 or 0 plus \n and \0 */
+	int size;
+
+	size = sprintf(buff, "%d\n", adapter->ras_comp_int[num].paused);
+
+	if (*ppos >= size)
+		return 0;
+
+	copy_to_user(user_buf, buff, size);
+	*ppos += size;
+	return size;
+}
+
+static ssize_t paused_write(struct file *file, const char __user *user_buf,
+			    size_t len, loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	int num = ras_comp_int->num;
+	union ibmvnic_crq crq;
+	unsigned long val;
+	char buff[9]; /* decimal max int plus \n and \0 */
+
+	copy_from_user(buff, user_buf, sizeof(buff));
+	val = kstrtoul(buff, 10, NULL);
+
+	adapter->ras_comp_int[num].paused = val ? 1 : 0;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.control_ras.first = IBMVNIC_CRQ_CMD;
+	crq.control_ras.cmd = CONTROL_RAS;
+	crq.control_ras.correlator = adapter->ras_comps[num].correlator;
+	crq.control_ras.op = val ? IBMVNIC_TRACE_PAUSE : IBMVNIC_TRACE_RESUME;
+	ibmvnic_send_crq(adapter, &crq);
+
+	return len;
+}
+
+static const struct file_operations paused_ops = {
+	.owner		= THIS_MODULE,
+	.open		= ibmvnic_fw_comp_open,
+	.read		= paused_read,
+	.write		= paused_write,
+};
+
+static ssize_t tracing_read(struct file *file, char __user *user_buf,
+			    size_t len, loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	int num = ras_comp_int->num;
+	char buff[5]; /*  1 or 0 plus \n and \0 */
+	int size;
+
+	size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_on);
+
+	if (*ppos >= size)
+		return 0;
+
+	copy_to_user(user_buf, buff, size);
+	*ppos += size;
+	return size;
+}
+
+static ssize_t tracing_write(struct file *file, const char __user *user_buf,
+			     size_t len, loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	int num = ras_comp_int->num;
+	union ibmvnic_crq crq;
+	unsigned long val;
+	char buff[9]; /* decimal max int plus \n and \0 */
+
+	copy_from_user(buff, user_buf, sizeof(buff));
+	val = kstrtoul(buff, 10, NULL);
+
+	memset(&crq, 0, sizeof(crq));
+	crq.control_ras.first = IBMVNIC_CRQ_CMD;
+	crq.control_ras.cmd = CONTROL_RAS;
+	crq.control_ras.correlator = adapter->ras_comps[num].correlator;
+	crq.control_ras.op = val ? IBMVNIC_TRACE_ON : IBMVNIC_TRACE_OFF;
+
+	return len;
+}
+
+static const struct file_operations tracing_ops = {
+	.owner		= THIS_MODULE,
+	.open		= ibmvnic_fw_comp_open,
+	.read		= tracing_read,
+	.write		= tracing_write,
+};
+
+static ssize_t error_level_read(struct file *file, char __user *user_buf,
+				size_t len, loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	int num = ras_comp_int->num;
+	char buff[5]; /* decimal max char plus \n and \0 */
+	int size;
+
+	size = sprintf(buff, "%d\n", adapter->ras_comps[num].error_check_level);
+
+	if (*ppos >= size)
+		return 0;
+
+	copy_to_user(user_buf, buff, size);
+	*ppos += size;
+	return size;
+}
+
+static ssize_t error_level_write(struct file *file, const char __user *user_buf,
+				 size_t len, loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	int num = ras_comp_int->num;
+	union ibmvnic_crq crq;
+	unsigned long val;
+	char buff[9]; /* decimal max int plus \n and \0 */
+
+	copy_from_user(buff, user_buf, sizeof(buff));
+	val = kstrtoul(buff, 10, NULL);
+
+	if (val > 9)
+		val = 9;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.control_ras.first = IBMVNIC_CRQ_CMD;
+	crq.control_ras.cmd = CONTROL_RAS;
+	crq.control_ras.correlator = adapter->ras_comps[num].correlator;
+	crq.control_ras.op = IBMVNIC_ERROR_LEVEL;
+	crq.control_ras.level = val;
+	ibmvnic_send_crq(adapter, &crq);
+
+	return len;
+}
+
+static const struct file_operations error_level_ops = {
+	.owner		= THIS_MODULE,
+	.open		= ibmvnic_fw_comp_open,
+	.read		= error_level_read,
+	.write		= error_level_write,
+};
+
+static ssize_t trace_level_read(struct file *file, char __user *user_buf,
+				size_t len, loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	int num = ras_comp_int->num;
+	char buff[5]; /* decimal max char plus \n and \0 */
+	int size;
+
+	size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_level);
+	if (*ppos >= size)
+		return 0;
+
+	copy_to_user(user_buf, buff, size);
+	*ppos += size;
+	return size;
+}
+
+static ssize_t trace_level_write(struct file *file, const char __user *user_buf,
+				 size_t len, loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	union ibmvnic_crq crq;
+	unsigned long val;
+	char buff[9]; /* decimal max int plus \n and \0 */
+
+	copy_from_user(buff, user_buf, sizeof(buff));
+	val = kstrtoul(buff, 10, NULL);
+	if (val > 9)
+		val = 9;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.control_ras.first = IBMVNIC_CRQ_CMD;
+	crq.control_ras.cmd = CONTROL_RAS;
+	crq.control_ras.correlator =
+	    adapter->ras_comps[ras_comp_int->num].correlator;
+	crq.control_ras.op = IBMVNIC_TRACE_LEVEL;
+	crq.control_ras.level = val;
+	ibmvnic_send_crq(adapter, &crq);
+
+	return len;
+}
+
+static const struct file_operations trace_level_ops = {
+	.owner		= THIS_MODULE,
+	.open		= ibmvnic_fw_comp_open,
+	.read		= trace_level_read,
+	.write		= trace_level_write,
+};
+
+static ssize_t trace_buff_size_read(struct file *file, char __user *user_buf,
+				    size_t len, loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	int num = ras_comp_int->num;
+	char buff[9]; /* decimal max int plus \n and \0 */
+	int size;
+
+	size = sprintf(buff, "%d\n", adapter->ras_comps[num].trace_buff_size);
+	if (*ppos >= size)
+		return 0;
+
+	copy_to_user(user_buf, buff, size);
+	*ppos += size;
+	return size;
+}
+
+static ssize_t trace_buff_size_write(struct file *file,
+				     const char __user *user_buf, size_t len,
+				     loff_t *ppos)
+{
+	struct ibmvnic_fw_comp_internal *ras_comp_int = file->private_data;
+	struct ibmvnic_adapter *adapter = ras_comp_int->adapter;
+	union ibmvnic_crq crq;
+	unsigned long val;
+	char buff[9]; /* decimal max int plus \n and \0 */
+
+	copy_from_user(buff, user_buf, sizeof(buff));
+	val = kstrtoul(buff, 10, NULL);
+
+	memset(&crq, 0, sizeof(crq));
+	crq.control_ras.first = IBMVNIC_CRQ_CMD;
+	crq.control_ras.cmd = CONTROL_RAS;
+	crq.control_ras.correlator =
+	    adapter->ras_comps[ras_comp_int->num].correlator;
+	crq.control_ras.op = IBMVNIC_CHG_TRACE_BUFF_SZ;
+	/* trace_buff_sz is 3 bytes, stuff an int into it */
+	crq.control_ras.trace_buff_sz[0] = ((u8 *)(&val))[5];
+	crq.control_ras.trace_buff_sz[1] = ((u8 *)(&val))[6];
+	crq.control_ras.trace_buff_sz[2] = ((u8 *)(&val))[7];
+	ibmvnic_send_crq(adapter, &crq);
+
+	return len;
+}
+
+static const struct file_operations trace_size_ops = {
+	.owner		= THIS_MODULE,
+	.open		= ibmvnic_fw_comp_open,
+	.read		= trace_buff_size_read,
+	.write		= trace_buff_size_write,
+};
+
+static void handle_request_ras_comps_rsp(union ibmvnic_crq *crq,
+					 struct ibmvnic_adapter *adapter)
+{
+	struct device *dev = &adapter->vdev->dev;
+	struct dentry *dir_ent;
+	struct dentry *ent;
+	int i;
+
+	debugfs_remove_recursive(adapter->ras_comps_ent);
+
+	adapter->ras_comps_ent = debugfs_create_dir("ras_comps",
+						    adapter->debugfs_dir);
+	if (!adapter->ras_comps_ent || IS_ERR(adapter->ras_comps_ent)) {
+		dev_info(dev, "debugfs create ras_comps dir failed\n");
+		return;
+	}
+
+	for (i = 0; i < adapter->ras_comp_num; i++) {
+		dir_ent = debugfs_create_dir(adapter->ras_comps[i].name,
+					     adapter->ras_comps_ent);
+		if (!dir_ent || IS_ERR(dir_ent)) {
+			dev_info(dev, "debugfs create %s dir failed\n",
+				 adapter->ras_comps[i].name);
+			continue;
+		}
+
+		adapter->ras_comp_int[i].adapter = adapter;
+		adapter->ras_comp_int[i].num = i;
+		adapter->ras_comp_int[i].desc_blob.data =
+		    &adapter->ras_comps[i].description;
+		adapter->ras_comp_int[i].desc_blob.size =
+		    sizeof(adapter->ras_comps[i].description);
+
+		/* Don't need to remember the dentry's because the debugfs dir
+		 * gets removed recursively
+		 */
+		ent = debugfs_create_blob("description", S_IRUGO, dir_ent,
+					  &adapter->ras_comp_int[i].desc_blob);
+		ent = debugfs_create_file("trace_buf_size", S_IRUGO | S_IWUSR,
+					  dir_ent, &adapter->ras_comp_int[i],
+					  &trace_size_ops);
+		ent = debugfs_create_file("trace_level",
+					  S_IRUGO |
+					  (adapter->ras_comps[i].trace_level !=
+					   0xFF  ? S_IWUSR : 0),
+					   dir_ent, &adapter->ras_comp_int[i],
+					   &trace_level_ops);
+		ent = debugfs_create_file("error_level",
+					  S_IRUGO |
+					  (adapter->
+					   ras_comps[i].error_check_level !=
+					   0xFF ? S_IWUSR : 0),
+					  dir_ent, &adapter->ras_comp_int[i],
+					  &trace_level_ops);
+		ent = debugfs_create_file("tracing", S_IRUGO | S_IWUSR,
+					  dir_ent, &adapter->ras_comp_int[i],
+					  &tracing_ops);
+		ent = debugfs_create_file("paused", S_IRUGO | S_IWUSR,
+					  dir_ent, &adapter->ras_comp_int[i],
+					  &paused_ops);
+		ent = debugfs_create_file("trace", S_IRUGO, dir_ent,
+					  &adapter->ras_comp_int[i],
+					  &trace_ops);
+	}
+}
+
+static void handle_request_ras_comp_num_rsp(union ibmvnic_crq *crq,
+					    struct ibmvnic_adapter *adapter)
+{
+	int len = adapter->ras_comp_num * sizeof(struct ibmvnic_fw_component);
+	struct device *dev = &adapter->vdev->dev;
+	union ibmvnic_crq newcrq;
+
+	adapter->ras_comps = dma_alloc_coherent(dev, len,
+						&adapter->ras_comps_tok,
+						GFP_KERNEL);
+	if (!adapter->ras_comps) {
+		if (!firmware_has_feature(FW_FEATURE_CMO))
+			dev_err(dev, "Couldn't alloc fw comps buffer\n");
+		return;
+	}
+
+	adapter->ras_comp_int = kmalloc(adapter->ras_comp_num *
+					sizeof(struct ibmvnic_fw_comp_internal),
+					GFP_KERNEL);
+	if (!adapter->ras_comp_int)
+		dma_free_coherent(dev, len, adapter->ras_comps,
+				  adapter->ras_comps_tok);
+
+	memset(&newcrq, 0, sizeof(newcrq));
+	newcrq.request_ras_comps.first = IBMVNIC_CRQ_CMD;
+	newcrq.request_ras_comps.cmd = REQUEST_RAS_COMPS;
+	newcrq.request_ras_comps.ioba = cpu_to_be32(adapter->ras_comps_tok);
+	newcrq.request_ras_comps.len = cpu_to_be32(len);
+	ibmvnic_send_crq(adapter, &newcrq);
+}
+
+static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_inflight_cmd *inflight_cmd;
+	struct device *dev = &adapter->vdev->dev;
+	struct ibmvnic_error_buff *error_buff;
+	unsigned long flags;
+	unsigned long flags2;
+
+	spin_lock_irqsave(&adapter->inflight_lock, flags);
+	list_for_each_entry(inflight_cmd, &adapter->inflight, list) {
+		switch (inflight_cmd->crq.generic.cmd) {
+		case LOGIN:
+			dma_unmap_single(dev, adapter->login_buf_token,
+					 adapter->login_buf_sz,
+					 DMA_BIDIRECTIONAL);
+			dma_unmap_single(dev, adapter->login_rsp_buf_token,
+					 adapter->login_rsp_buf_sz,
+					 DMA_BIDIRECTIONAL);
+			kfree(adapter->login_rsp_buf);
+			kfree(adapter->login_buf);
+			break;
+		case REQUEST_DUMP:
+			complete(&adapter->fw_done);
+			break;
+		case REQUEST_ERROR_INFO:
+			spin_lock_irqsave(&adapter->error_list_lock, flags2);
+			list_for_each_entry(error_buff, &adapter->errors,
+					    list) {
+				dma_unmap_single(dev, error_buff->dma,
+						 error_buff->len,
+						 DMA_FROM_DEVICE);
+				kfree(error_buff->buff);
+				list_del(&error_buff->list);
+				kfree(error_buff);
+			}
+			spin_unlock_irqrestore(&adapter->error_list_lock,
+					       flags2);
+			break;
+		}
+		list_del(&inflight_cmd->list);
+		kfree(inflight_cmd);
+	}
+	spin_unlock_irqrestore(&adapter->inflight_lock, flags);
+}
+
+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;
+	long rc;
+
+	netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
+		   ((unsigned long int *)crq)[0],
+		   ((unsigned long int *)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");
+			/* Send back a response */
+			rc = ibmvnic_send_crq_init_complete(adapter);
+			if (rc == 0)
+				send_version_xchg(adapter);
+			else
+				dev_err(dev, "Can't send initrsp rc=%ld\n", rc);
+			break;
+		case IBMVNIC_CRQ_INIT_COMPLETE:
+			dev_info(dev, "Partner initialization complete\n");
+			send_version_xchg(adapter);
+			break;
+		default:
+			dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
+		}
+		return;
+	case IBMVNIC_CRQ_XPORT_EVENT:
+		if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
+			dev_info(dev, "Re-enabling adapter\n");
+			adapter->migrated = true;
+			ibmvnic_free_inflight(adapter);
+			release_sub_crqs(adapter);
+			rc = ibmvnic_reenable_crq_queue(adapter);
+			if (rc)
+				dev_err(dev, "Error after enable rc=%ld\n", rc);
+			adapter->migrated = false;
+			rc = ibmvnic_send_crq_init(adapter);
+			if (rc)
+				dev_err(dev, "Error sending init rc=%ld\n", rc);
+		} else {
+			/* The adapter lost the connection */
+			dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
+				gen_crq->cmd);
+			ibmvnic_free_inflight(adapter);
+			release_sub_crqs(adapter);
+		}
+		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;
+		}
+		dev_info(dev, "Partner protocol version is %d\n",
+			 crq->version_exchange_rsp.version);
+		if (be16_to_cpu(crq->version_exchange_rsp.version) <
+		    ibmvnic_version)
+			ibmvnic_version =
+			    be16_to_cpu(crq->version_exchange_rsp.version);
+		send_cap_queries(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:
+		handle_request_map_rsp(crq, adapter);
+		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\n");
+		adapter->logical_link_state =
+		    crq->logical_link_state_rsp.link_state;
+		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;
+		break;
+	case CHANGE_MAC_ADDR_RSP:
+		netdev_dbg(netdev, "Got MAC address change Response\n");
+		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_ERROR_RSP:
+		netdev_dbg(netdev, "Got Error Detail Response\n");
+		handle_error_info_rsp(crq, adapter);
+		break;
+	case REQUEST_STATISTICS_RSP:
+		netdev_dbg(netdev, "Got Statistics Response\n");
+		complete(&adapter->stats_done);
+		break;
+	case REQUEST_DUMP_SIZE_RSP:
+		netdev_dbg(netdev, "Got Request Dump Size Response\n");
+		handle_dump_size_rsp(crq, adapter);
+		break;
+	case REQUEST_DUMP_RSP:
+		netdev_dbg(netdev, "Got Request Dump Response\n");
+		complete(&adapter->fw_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);
+		/* We're done with the queries, perform the login */
+		send_login(adapter);
+		break;
+	case REQUEST_RAS_COMP_NUM_RSP:
+		netdev_dbg(netdev, "Got Request RAS Comp Num Response\n");
+		if (crq->request_ras_comp_num_rsp.rc.code == 10) {
+			netdev_dbg(netdev, "Request RAS Comp Num not supported\n");
+			break;
+		}
+		adapter->ras_comp_num =
+		    be32_to_cpu(crq->request_ras_comp_num_rsp.num_components);
+		handle_request_ras_comp_num_rsp(crq, adapter);
+		break;
+	case REQUEST_RAS_COMPS_RSP:
+		netdev_dbg(netdev, "Got Request RAS Comps Response\n");
+		handle_request_ras_comps_rsp(crq, adapter);
+		break;
+	case CONTROL_RAS_RSP:
+		netdev_dbg(netdev, "Got Control RAS Response\n");
+		handle_control_ras_rsp(crq, adapter);
+		break;
+	case COLLECT_FW_TRACE_RSP:
+		netdev_dbg(netdev, "Got Collect firmware trace Response\n");
+		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;
+	struct ibmvnic_crq_queue *queue = &adapter->crq;
+	struct vio_dev *vdev = adapter->vdev;
+	union ibmvnic_crq *crq;
+	unsigned long flags;
+	bool done = false;
+
+	spin_lock_irqsave(&queue->lock, flags);
+	vio_disable_interrupts(vdev);
+	while (!done) {
+		/* Pull all the valid messages off the CRQ */
+		while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
+			ibmvnic_handle_crq(crq, adapter);
+			crq->generic.first = 0;
+		}
+		vio_enable_interrupts(vdev);
+		crq = ibmvnic_next_crq(adapter);
+		if (crq) {
+			vio_disable_interrupts(vdev);
+			ibmvnic_handle_crq(crq, adapter);
+			crq->generic.first = 0;
+		} else {
+			done = true;
+		}
+	}
+	spin_unlock_irqrestore(&queue->lock, flags);
+	return IRQ_HANDLED;
+}
+
+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 */
+	memset(crq->msgs, 0, PAGE_SIZE);
+	crq->cur = 0;
+
+	/* 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 ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
+{
+	struct ibmvnic_crq_queue *crq = &adapter->crq;
+	struct vio_dev *vdev = adapter->vdev;
+	long rc;
+
+	netdev_dbg(adapter->netdev, "Releasing CRQ\n");
+	free_irq(vdev->irq, adapter);
+	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);
+}
+
+static int ibmvnic_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;
+
+	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;
+
+	netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
+	rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_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);
+
+	return retrc;
+
+req_irq_failed:
+	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);
+	return retrc;
+}
+
+/* debugfs for dump */
+static int ibmvnic_dump_show(struct seq_file *seq, void *v)
+{
+	struct net_device *netdev = seq->private;
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+	struct device *dev = &adapter->vdev->dev;
+	union ibmvnic_crq crq;
+
+	memset(&crq, 0, sizeof(crq));
+	crq.request_dump_size.first = IBMVNIC_CRQ_CMD;
+	crq.request_dump_size.cmd = REQUEST_DUMP_SIZE;
+	ibmvnic_send_crq(adapter, &crq);
+
+	init_completion(&adapter->fw_done);
+	wait_for_completion(&adapter->fw_done);
+
+	seq_write(seq, adapter->dump_data, adapter->dump_data_size);
+
+	dma_unmap_single(dev, adapter->dump_data_token, adapter->dump_data_size,
+			 DMA_BIDIRECTIONAL);
+
+	kfree(adapter->dump_data);
+
+	return 0;
+}
+
+static int ibmvnic_dump_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, ibmvnic_dump_show, inode->i_private);
+}
+
+static const struct file_operations ibmvnic_dump_ops = {
+	.owner          = THIS_MODULE,
+	.open           = ibmvnic_dump_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release        = single_release,
+};
+
+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;
+	struct dentry *ent;
+	char buf[16]; /* debugfs name buf */
+	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_TX_QUEUES);
+	if (!netdev)
+		return -ENOMEM;
+
+	adapter = netdev_priv(netdev);
+	dev_set_drvdata(&dev->dev, netdev);
+	adapter->vdev = dev;
+	adapter->netdev = netdev;
+
+	ether_addr_copy(adapter->mac_addr, mac_addr_p);
+	ether_addr_copy(netdev->dev_addr, 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);
+
+	spin_lock_init(&adapter->stats_lock);
+
+	rc = ibmvnic_init_crq_queue(adapter);
+	if (rc) {
+		dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", rc);
+		goto free_netdev;
+	}
+
+	INIT_LIST_HEAD(&adapter->errors);
+	INIT_LIST_HEAD(&adapter->inflight);
+	spin_lock_init(&adapter->error_list_lock);
+	spin_lock_init(&adapter->inflight_lock);
+
+	adapter->stats_token = dma_map_single(&dev->dev, &adapter->stats,
+					      sizeof(struct ibmvnic_statistics),
+					      DMA_FROM_DEVICE);
+	if (dma_mapping_error(&dev->dev, adapter->stats_token)) {
+		if (!firmware_has_feature(FW_FEATURE_CMO))
+			dev_err(&dev->dev, "Couldn't map stats buffer\n");
+		goto free_crq;
+	}
+
+	snprintf(buf, sizeof(buf), "ibmvnic_%x", dev->unit_address);
+	ent = debugfs_create_dir(buf, NULL);
+	if (!ent || IS_ERR(ent)) {
+		dev_info(&dev->dev, "debugfs create directory failed\n");
+		adapter->debugfs_dir = NULL;
+	} else {
+		adapter->debugfs_dir = ent;
+		ent = debugfs_create_file("dump", S_IRUGO, adapter->debugfs_dir,
+					  netdev, &ibmvnic_dump_ops);
+		if (!ent || IS_ERR(ent)) {
+			dev_info(&dev->dev,
+				 "debugfs create dump file failed\n");
+			adapter->debugfs_dump = NULL;
+		} else {
+			adapter->debugfs_dump = ent;
+		}
+	}
+	ibmvnic_send_crq_init(adapter);
+
+	init_completion(&adapter->init_done);
+	wait_for_completion(&adapter->init_done);
+
+	/* needed to pull init_sub_crqs outside of an interrupt context
+	 * because it creates IRQ mappings for the subCRQ queues, causing
+	 * a kernel warning
+	 */
+	init_sub_crqs(adapter, 0);
+
+	reinit_completion(&adapter->init_done);
+	wait_for_completion(&adapter->init_done);
+
+	/* if init_sub_crqs is partially successful, retry */
+	while (!adapter->tx_scrq || !adapter->rx_scrq) {
+		init_sub_crqs(adapter, 1);
+
+		reinit_completion(&adapter->init_done);
+		wait_for_completion(&adapter->init_done);
+	}
+
+	netdev->real_num_tx_queues = adapter->req_tx_queues;
+
+	rc = register_netdev(netdev);
+	if (rc) {
+		dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
+		goto free_debugfs;
+	}
+	dev_info(&dev->dev, "ibmvnic registered\n");
+
+	return 0;
+
+free_debugfs:
+	if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
+		debugfs_remove_recursive(adapter->debugfs_dir);
+free_crq:
+	ibmvnic_release_crq_queue(adapter);
+free_netdev:
+	free_netdev(netdev);
+	return rc;
+}
+
+static int ibmvnic_remove(struct vio_dev *dev)
+{
+	struct net_device *netdev = dev_get_drvdata(&dev->dev);
+	struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+	unregister_netdev(netdev);
+
+	release_sub_crqs(adapter);
+
+	ibmvnic_release_crq_queue(adapter);
+
+	if (adapter->debugfs_dir && !IS_ERR(adapter->debugfs_dir))
+		debugfs_remove_recursive(adapter->debugfs_dir);
+
+	if (adapter->ras_comps)
+		dma_free_coherent(&dev->dev,
+				  adapter->ras_comp_num *
+				  sizeof(struct ibmvnic_fw_component),
+				  adapter->ras_comps, adapter->ras_comps_tok);
+
+	kfree(adapter->ras_comp_int);
+
+	free_netdev(netdev);
+	dev_set_drvdata(&dev->dev, NULL);
+
+	return 0;
+}
+
+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 += adapter->bounce_buffer_size;
+	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 < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+	     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);
+	int i;
+
+	/* kick the interrupt handlers just in case we lost an interrupt */
+	for (i = 0; i < adapter->req_rx_queues; i++)
+		ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq,
+				     adapter->rx_scrq[i]);
+
+	return 0;
+}
+
+static 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)
+{
+	pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
+		IBMVNIC_DRIVER_VERSION);
+
+	return vio_register_driver(&ibmvnic_driver);
+}
+
+static void __exit ibmvnic_module_exit(void)
+{
+	vio_unregister_driver(&ibmvnic_driver);
+}
+
+module_init(ibmvnic_module_init);
+module_exit(ibmvnic_module_exit);

drivers/net/ethernet/ibm/ibmvnic.h

+/**************************************************************************/
+/*                                                                        */
+/*  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 program is free software; you can redistribute it and/or modify  */
+/*  it under the terms of the GNU General Public License as published by  */
+/*  the Free Software Foundation; either version 2 of the License, or     */
+/*  (at your option) any later version.                                   */
+/*                                                                        */
+/*  This program is distributed in the hope that it will be useful,       */
+/*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
+/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         */
+/*  GNU General Public License for more details.                          */
+/*                                                                        */
+/*  You should have received a copy of the GNU General Public License     */
+/*  along with this program.                                              */
+/*                                                                        */
+/* This module contains the implementation of a virtual ethernet device   */
+/* for use with IBM i/pSeries 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.   */
+/*                                                                        */
+/**************************************************************************/
+
+#define IBMVNIC_NAME		"ibmvnic"
+#define IBMVNIC_DRIVER_VERSION	"1.0"
+#define IBMVNIC_INVALID_MAP	-1
+#define IBMVNIC_STATS_TIMEOUT	1
+/* basic structures plus 100 2k buffers */
+#define IBMVNIC_IO_ENTITLEMENT_DEFAULT	610305
+
+/* Initial module_parameters */
+#define IBMVNIC_RX_WEIGHT		16
+/* when changing this, update IBMVNIC_IO_ENTITLEMENT_DEFAULT */
+#define IBMVNIC_BUFFS_PER_POOL	100
+#define IBMVNIC_MAX_TX_QUEUES	5
+
+struct ibmvnic_login_buffer {
+	__be32 len;
+	__be32 version;
+#define INITIAL_VERSION_LB 1
+	__be32 num_txcomp_subcrqs;
+	__be32 off_txcomp_subcrqs;
+	__be32 num_rxcomp_subcrqs;
+	__be32 off_rxcomp_subcrqs;
+	__be32 login_rsp_ioba;
+	__be32 login_rsp_len;
+} __packed __aligned(8);
+
+struct ibmvnic_login_rsp_buffer {
+	__be32 len;
+	__be32 version;
+#define INITIAL_VERSION_LRB 1
+	__be32 num_txsubm_subcrqs;
+	__be32 off_txsubm_subcrqs;
+	__be32 num_rxadd_subcrqs;
+	__be32 off_rxadd_subcrqs;
+	__be32 off_rxadd_buff_size;
+	__be32 num_supp_tx_desc;
+	__be32 off_supp_tx_desc;
+} __packed __aligned(8);
+
+struct ibmvnic_query_ip_offload_buffer {
+	__be32 len;
+	__be32 version;
+#define INITIAL_VERSION_IOB 1
+	u8 ipv4_chksum;
+	u8 ipv6_chksum;
+	u8 tcp_ipv4_chksum;
+	u8 tcp_ipv6_chksum;
+	u8 udp_ipv4_chksum;
+	u8 udp_ipv6_chksum;
+	u8 large_tx_ipv4;
+	u8 large_tx_ipv6;
+	u8 large_rx_ipv4;
+	u8 large_rx_ipv6;
+	u8 reserved1[14];
+	__be16 max_ipv4_header_size;
+	__be16 max_ipv6_header_size;
+	__be16 max_tcp_header_size;
+	__be16 max_udp_header_size;
+	__be32 max_large_tx_size;
+	__be32 max_large_rx_size;
+	u8 reserved2[16];
+	u8 ipv6_extension_header;
+#define IPV6_EH_NOT_SUPPORTED	0x00
+#define IPV6_EH_SUPPORTED_LIM	0x01
+#define IPV6_EH_SUPPORTED	0xFF
+	u8 tcp_pseudosum_req;
+#define TCP_PS_NOT_REQUIRED	0x00
+#define TCP_PS_REQUIRED		0x01
+	u8 reserved3[30];
+	__be16 num_ipv6_ext_headers;
+	__be32 off_ipv6_ext_headers;
+	u8 reserved4[154];
+} __packed __aligned(8);
+
+struct ibmvnic_control_ip_offload_buffer {
+	__be32 len;
+	__be32 version;
+#define INITIAL_VERSION_IOB 1
+	u8 ipv4_chksum;
+	u8 ipv6_chksum;
+	u8 tcp_ipv4_chksum;
+	u8 tcp_ipv6_chksum;
+	u8 udp_ipv4_chksum;
+	u8 udp_ipv6_chksum;
+	u8 large_tx_ipv4;
+	u8 large_tx_ipv6;
+	u8 bad_packet_rx;
+	u8 large_rx_ipv4;
+	u8 large_rx_ipv6;
+	u8 reserved4[111];
+} __packed __aligned(8);
+
+struct ibmvnic_fw_component {
+	u8 name[48];
+	__be32 trace_buff_size;
+	u8 correlator;
+	u8 trace_level;
+	u8 parent_correlator;
+	u8 error_check_level;
+	u8 trace_on;
+	u8 reserved[7];
+	u8 description[192];
+} __packed __aligned(8);
+
+struct ibmvnic_fw_trace_entry {
+	__be32 trace_id;
+	u8 num_valid_data;
+	u8 reserved[3];
+	__be64 pmc_registers;
+	__be64 timebase;
+	__be64 trace_data[5];
+} __packed __aligned(8);
+
+struct ibmvnic_statistics {
+	__be32 version;
+	__be32 promiscuous;
+	__be64 rx_packets;
+	__be64 rx_bytes;
+	__be64 tx_packets;
+	__be64 tx_bytes;
+	__be64 ucast_tx_packets;
+	__be64 ucast_rx_packets;
+	__be64 mcast_tx_packets;
+	__be64 mcast_rx_packets;
+	__be64 bcast_tx_packets;
+	__be64 bcast_rx_packets;
+	__be64 align_errors;
+	__be64 fcs_errors;
+	__be64 single_collision_frames;
+	__be64 multi_collision_frames;
+	__be64 sqe_test_errors;
+	__be64 deferred_tx;
+	__be64 late_collisions;
+	__be64 excess_collisions;
+	__be64 internal_mac_tx_errors;
+	__be64 carrier_sense;
+	__be64 too_long_frames;
+	__be64 internal_mac_rx_errors;
+	u8 reserved[72];
+} __packed __aligned(8);
+
+struct ibmvnic_acl_buffer {
+	__be32 len;
+	__be32 version;
+#define INITIAL_VERSION_IOB 1
+	u8 mac_acls_restrict;
+	u8 vlan_acls_restrict;
+	u8 reserved1[22];
+	__be32 num_mac_addrs;
+	__be32 offset_mac_addrs;
+	__be32 num_vlan_ids;
+	__be32 offset_vlan_ids;
+	u8 reserved2[80];
+} __packed __aligned(8);
+
+/* descriptors have been changed, how should this be defined?  1? 4? */
+
+#define IBMVNIC_TX_DESC_VERSIONS 3
+
+/* is this still needed? */
+struct ibmvnic_tx_comp_desc {
+	u8 first;
+	u8 num_comps;
+	__be16 rcs[5];
+	__be32 correlators[5];
+} __packed __aligned(8);
+
+/* some flags that included in v0 descriptor, which is gone
+ * only used for IBMVNIC_TCP_CHKSUM and IBMVNIC_UDP_CHKSUM
+ * and only in some offload_flags variable that doesn't seem
+ * to be used anywhere, can probably be removed?
+ */
+
+#define IBMVNIC_TCP_CHKSUM		0x20
+#define IBMVNIC_UDP_CHKSUM		0x08
+
+#define IBMVNIC_MAX_FRAGS_PER_CRQ 3
+
+struct ibmvnic_tx_desc {
+	u8 first;
+	u8 type;
+
+#define IBMVNIC_TX_DESC 0x10
+	u8 n_crq_elem;
+	u8 n_sge;
+	u8 flags1;
+#define IBMVNIC_TX_COMP_NEEDED		0x80
+#define IBMVNIC_TX_CHKSUM_OFFLOAD	0x40
+#define IBMVNIC_TX_LSO			0x20
+#define IBMVNIC_TX_PROT_TCP		0x10
+#define IBMVNIC_TX_PROT_UDP		0x08
+#define IBMVNIC_TX_PROT_IPV4		0x04
+#define IBMVNIC_TX_PROT_IPV6		0x02
+#define IBMVNIC_TX_VLAN_PRESENT		0x01
+	u8 flags2;
+#define IBMVNIC_TX_VLAN_INSERT		0x80
+	__be16 mss;
+	u8 reserved[4];
+	__be32 correlator;
+	__be16 vlan_id;
+	__be16 dma_reg;
+	__be32 sge_len;
+	__be64 ioba;
+} __packed __aligned(8);
+
+struct ibmvnic_hdr_desc {
+	u8 first;
+	u8 type;
+#define IBMVNIC_HDR_DESC		0x11
+	u8 len;
+	u8 l2_len;
+	__be16 l3_len;
+	u8 l4_len;
+	u8 flag;
+	u8 data[24];
+} __packed __aligned(8);
+
+struct ibmvnic_hdr_ext_desc {
+	u8 first;
+	u8 type;
+#define IBMVNIC_HDR_EXT_DESC		0x12
+	u8 len;
+	u8 data[29];
+} __packed __aligned(8);
+
+struct ibmvnic_sge_desc {
+	u8 first;
+	u8 type;
+#define IBMVNIC_SGE_DESC		0x30
+	__be16 sge1_dma_reg;
+	__be32 sge1_len;
+	__be64 sge1_ioba;
+	__be16 reserved;
+	__be16 sge2_dma_reg;
+	__be32 sge2_len;
+	__be64 sge2_ioba;
+} __packed __aligned(8);
+
+struct ibmvnic_rx_comp_desc {
+	u8 first;
+	u8 flags;
+#define IBMVNIC_IP_CHKSUM_GOOD		0x80
+#define IBMVNIC_TCP_UDP_CHKSUM_GOOD	0x40
+#define IBMVNIC_END_FRAME			0x20
+#define IBMVNIC_EXACT_MC			0x10
+#define IBMVNIC_VLAN_STRIPPED			0x08
+	__be16 off_frame_data;
+	__be32 len;
+	__be64 correlator;
+	__be16 vlan_tci;
+	__be16 rc;
+	u8 reserved[12];
+} __packed __aligned(8);
+
+struct ibmvnic_generic_scrq {
+	u8 first;
+	u8 reserved[31];
+} __packed __aligned(8);
+
+struct ibmvnic_rx_buff_add_desc {
+	u8 first;
+	u8 reserved[7];
+	__be64 correlator;
+	__be32 ioba;
+	u8 map_id;
+	__be32 len:24;
+	u8 reserved2[8];
+} __packed __aligned(8);
+
+struct ibmvnic_rc {
+	u8 code; /* one of enum ibmvnic_rc_codes */
+	u8 detailed_data[3];
+} __packed __aligned(4);
+
+struct ibmvnic_generic_crq {
+	u8 first;
+	u8 cmd;
+	u8 params[10];
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_version_exchange {
+	u8 first;
+	u8 cmd;
+	__be16 version;
+#define IBMVNIC_INITIAL_VERSION 1
+	u8 reserved[8];
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_capability {
+	u8 first;
+	u8 cmd;
+	__be16 capability; /* one of ibmvnic_capabilities */
+	struct ibmvnic_rc rc;
+	__be32 number; /*FIX: should be __be64, but I'm getting the least
+			* significant word first
+			*/
+} __packed __aligned(8);
+
+struct ibmvnic_login {
+	u8 first;
+	u8 cmd;
+	u8 reserved[6];
+	__be32 ioba;
+	__be32 len;
+} __packed __aligned(8);
+
+struct ibmvnic_phys_parms {
+	u8 first;
+	u8 cmd;
+	u8 flags1;
+#define IBMVNIC_EXTERNAL_LOOPBACK	0x80
+#define IBMVNIC_INTERNAL_LOOPBACK	0x40
+#define IBMVNIC_PROMISC		0x20
+#define IBMVNIC_PHYS_LINK_ACTIVE	0x10
+#define IBMVNIC_AUTONEG_DUPLEX	0x08
+#define IBMVNIC_FULL_DUPLEX	0x04
+#define IBMVNIC_HALF_DUPLEX	0x02
+#define IBMVNIC_CAN_CHG_PHYS_PARMS	0x01
+	u8 flags2;
+#define IBMVNIC_LOGICAL_LNK_ACTIVE 0x80
+	__be32 speed;
+#define IBMVNIC_AUTONEG		0x80
+#define IBMVNIC_10MBPS		0x40
+#define IBMVNIC_100MBPS		0x20
+#define IBMVNIC_1GBPS		0x10
+#define IBMVNIC_10GBPS		0x08
+	__be32 mtu;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_logical_link_state {
+	u8 first;
+	u8 cmd;
+	u8 link_state;
+#define IBMVNIC_LOGICAL_LNK_DN 0x00
+#define IBMVNIC_LOGICAL_LNK_UP 0x01
+#define IBMVNIC_LOGICAL_LNK_QUERY 0xff
+	u8 reserved[9];
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_query_ip_offload {
+	u8 first;
+	u8 cmd;
+	u8 reserved[2];
+	__be32 len;
+	__be32 ioba;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_control_ip_offload {
+	u8 first;
+	u8 cmd;
+	u8 reserved[2];
+	__be32 ioba;
+	__be32 len;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_request_dump_size {
+	u8 first;
+	u8 cmd;
+	u8 reserved[6];
+	__be32 len;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_request_dump {
+	u8 first;
+	u8 cmd;
+	u8 reserved1[2];
+	__be32 ioba;
+	__be32 len;
+	u8 reserved2[4];
+} __packed __aligned(8);
+
+struct ibmvnic_request_dump_rsp {
+	u8 first;
+	u8 cmd;
+	u8 reserved[6];
+	__be32 dumped_len;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_request_ras_comp_num {
+	u8 first;
+	u8 cmd;
+	u8 reserved1[2];
+	__be32 num_components;
+	u8 reserved2[4];
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_request_ras_comps {
+	u8 first;
+	u8 cmd;
+	u8 reserved[2];
+	__be32 ioba;
+	__be32 len;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_control_ras {
+	u8 first;
+	u8 cmd;
+	u8 correlator;
+	u8 level;
+	u8 op;
+#define IBMVNIC_TRACE_LEVEL	1
+#define IBMVNIC_ERROR_LEVEL	2
+#define IBMVNIC_TRACE_PAUSE	3
+#define IBMVNIC_TRACE_RESUME	4
+#define IBMVNIC_TRACE_ON		5
+#define IBMVNIC_TRACE_OFF		6
+#define IBMVNIC_CHG_TRACE_BUFF_SZ	7
+	u8 trace_buff_sz[3];
+	u8 reserved[4];
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_collect_fw_trace {
+	u8 first;
+	u8 cmd;
+	u8 correlator;
+	u8 reserved;
+	__be32 ioba;
+	__be32 len;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_request_statistics {
+	u8 first;
+	u8 cmd;
+	u8 flags;
+#define IBMVNIC_PHYSICAL_PORT	0x80
+	u8 reserved1;
+	__be32 ioba;
+	__be32 len;
+	u8 reserved[4];
+} __packed __aligned(8);
+
+struct ibmvnic_request_debug_stats {
+	u8 first;
+	u8 cmd;
+	u8 reserved[2];
+	__be32 ioba;
+	__be32 len;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_error_indication {
+	u8 first;
+	u8 cmd;
+	u8 flags;
+#define IBMVNIC_FATAL_ERROR	0x80
+	u8 reserved1;
+	__be32 error_id;
+	__be32 detail_error_sz;
+	__be16 error_cause;
+	u8 reserved2[2];
+} __packed __aligned(8);
+
+struct ibmvnic_request_error_info {
+	u8 first;
+	u8 cmd;
+	u8 reserved[2];
+	__be32 ioba;
+	__be32 len;
+	__be32 error_id;
+} __packed __aligned(8);
+
+struct ibmvnic_request_error_rsp {
+	u8 first;
+	u8 cmd;
+	u8 reserved[2];
+	__be32 error_id;
+	__be32 len;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_link_state_indication {
+	u8 first;
+	u8 cmd;
+	u8 reserved1[2];
+	u8 phys_link_state;
+	u8 logical_link_state;
+	u8 reserved2[10];
+} __packed __aligned(8);
+
+struct ibmvnic_change_mac_addr {
+	u8 first;
+	u8 cmd;
+	u8 mac_addr[6];
+	struct ibmvnic_rc rc;
+	u8 reserved[4];
+} __packed __aligned(8);
+
+struct ibmvnic_multicast_ctrl {
+	u8 first;
+	u8 cmd;
+	u8 mac_addr[6];
+	u8 flags;
+#define IBMVNIC_ENABLE_MC		0x80
+#define IBMVNIC_DISABLE_MC		0x40
+#define IBMVNIC_ENABLE_ALL		0x20
+#define IBMVNIC_DISABLE_ALL	0x10
+	u8 reserved1;
+	__be16 reserved2; /* was num_enabled_mc_addr; */
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_get_vpd_size_rsp {
+	u8 first;
+	u8 cmd;
+	u8 reserved[2];
+	__be64 len;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_get_vpd {
+	u8 first;
+	u8 cmd;
+	u8 reserved1[2];
+	__be32 ioba;
+	__be32 len;
+	u8 reserved[4];
+} __packed __aligned(8);
+
+struct ibmvnic_acl_change_indication {
+	u8 first;
+	u8 cmd;
+	__be16 change_type;
+#define IBMVNIC_MAC_ACL 0
+#define IBMVNIC_VLAN_ACL 1
+	u8 reserved[12];
+} __packed __aligned(8);
+
+struct ibmvnic_acl_query {
+	u8 first;
+	u8 cmd;
+	u8 reserved1[2];
+	__be32 ioba;
+	__be32 len;
+	u8 reserved2[4];
+} __packed __aligned(8);
+
+struct ibmvnic_tune {
+	u8 first;
+	u8 cmd;
+	u8 reserved1[2];
+	__be32 ioba;
+	__be32 len;
+	u8 reserved2[4];
+} __packed __aligned(8);
+
+struct ibmvnic_request_map {
+	u8 first;
+	u8 cmd;
+	u8 reserved1;
+	u8 map_id;
+	__be32 ioba;
+	__be32 len;
+	u8 reserved2[4];
+} __packed __aligned(8);
+
+struct ibmvnic_request_map_rsp {
+	u8 first;
+	u8 cmd;
+	u8 reserved1;
+	u8 map_id;
+	u8 reserved2[4];
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_request_unmap {
+	u8 first;
+	u8 cmd;
+	u8 reserved1;
+	u8 map_id;
+	u8 reserved2[12];
+} __packed __aligned(8);
+
+struct ibmvnic_request_unmap_rsp {
+	u8 first;
+	u8 cmd;
+	u8 reserved1;
+	u8 map_id;
+	u8 reserved2[8];
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+struct ibmvnic_query_map {
+	u8 first;
+	u8 cmd;
+	u8 reserved[14];
+} __packed __aligned(8);
+
+struct ibmvnic_query_map_rsp {
+	u8 first;
+	u8 cmd;
+	u8 reserved;
+	u8 page_size;
+	__be32 tot_pages;
+	__be32 free_pages;
+	struct ibmvnic_rc rc;
+} __packed __aligned(8);
+
+union ibmvnic_crq {
+	struct ibmvnic_generic_crq generic;
+	struct ibmvnic_version_exchange version_exchange;
+	struct ibmvnic_version_exchange version_exchange_rsp;
+	struct ibmvnic_capability query_capability;
+	struct ibmvnic_capability query_capability_rsp;
+	struct ibmvnic_capability request_capability;
+	struct ibmvnic_capability request_capability_rsp;
+	struct ibmvnic_login login;
+	struct ibmvnic_generic_crq login_rsp;
+	struct ibmvnic_phys_parms query_phys_parms;
+	struct ibmvnic_phys_parms query_phys_parms_rsp;
+	struct ibmvnic_phys_parms query_phys_capabilities;
+	struct ibmvnic_phys_parms query_phys_capabilities_rsp;
+	struct ibmvnic_phys_parms set_phys_parms;
+	struct ibmvnic_phys_parms set_phys_parms_rsp;
+	struct ibmvnic_logical_link_state logical_link_state;
+	struct ibmvnic_logical_link_state logical_link_state_rsp;
+	struct ibmvnic_query_ip_offload query_ip_offload;
+	struct ibmvnic_query_ip_offload query_ip_offload_rsp;
+	struct ibmvnic_control_ip_offload control_ip_offload;
+	struct ibmvnic_control_ip_offload control_ip_offload_rsp;
+	struct ibmvnic_request_dump_size request_dump_size;
+	struct ibmvnic_request_dump_size request_dump_size_rsp;
+	struct ibmvnic_request_dump request_dump;
+	struct ibmvnic_request_dump_rsp request_dump_rsp;
+	struct ibmvnic_request_ras_comp_num request_ras_comp_num;
+	struct ibmvnic_request_ras_comp_num request_ras_comp_num_rsp;
+	struct ibmvnic_request_ras_comps request_ras_comps;
+	struct ibmvnic_request_ras_comps request_ras_comps_rsp;
+	struct ibmvnic_control_ras control_ras;
+	struct ibmvnic_control_ras control_ras_rsp;
+	struct ibmvnic_collect_fw_trace collect_fw_trace;
+	struct ibmvnic_collect_fw_trace collect_fw_trace_rsp;
+	struct ibmvnic_request_statistics request_statistics;
+	struct ibmvnic_generic_crq request_statistics_rsp;
+	struct ibmvnic_request_debug_stats request_debug_stats;
+	struct ibmvnic_request_debug_stats request_debug_stats_rsp;
+	struct ibmvnic_error_indication error_indication;
+	struct ibmvnic_request_error_info request_error_info;
+	struct ibmvnic_request_error_rsp request_error_rsp;
+	struct ibmvnic_link_state_indication link_state_indication;
+	struct ibmvnic_change_mac_addr change_mac_addr;
+	struct ibmvnic_change_mac_addr change_mac_addr_rsp;
+	struct ibmvnic_multicast_ctrl multicast_ctrl;
+	struct ibmvnic_multicast_ctrl multicast_ctrl_rsp;
+	struct ibmvnic_generic_crq get_vpd_size;
+	struct ibmvnic_get_vpd_size_rsp get_vpd_size_rsp;
+	struct ibmvnic_get_vpd get_vpd;
+	struct ibmvnic_generic_crq get_vpd_rsp;
+	struct ibmvnic_acl_change_indication acl_change_indication;
+	struct ibmvnic_acl_query acl_query;
+	struct ibmvnic_generic_crq acl_query_rsp;
+	struct ibmvnic_tune tune;
+	struct ibmvnic_generic_crq tune_rsp;
+	struct ibmvnic_request_map request_map;
+	struct ibmvnic_request_map_rsp request_map_rsp;
+	struct ibmvnic_request_unmap request_unmap;
+	struct ibmvnic_request_unmap_rsp request_unmap_rsp;
+	struct ibmvnic_query_map query_map;
+	struct ibmvnic_query_map_rsp query_map_rsp;
+};
+
+enum ibmvnic_rc_codes {
+	SUCCESS = 0,
+	PARTIALSUCCESS = 1,
+	PERMISSION = 2,
+	NOMEMORY = 3,
+	PARAMETER = 4,
+	UNKNOWNCOMMAND = 5,
+	ABORTED = 6,
+	INVALIDSTATE = 7,
+	INVALIDIOBA = 8,
+	INVALIDLENGTH = 9,
+	UNSUPPORTEDOPTION = 10,
+};
+
+enum ibmvnic_capabilities {
+	MIN_TX_QUEUES = 1,
+	MIN_RX_QUEUES = 2,
+	MIN_RX_ADD_QUEUES = 3,
+	MAX_TX_QUEUES = 4,
+	MAX_RX_QUEUES = 5,
+	MAX_RX_ADD_QUEUES = 6,
+	REQ_TX_QUEUES = 7,
+	REQ_RX_QUEUES = 8,
+	REQ_RX_ADD_QUEUES = 9,
+	MIN_TX_ENTRIES_PER_SUBCRQ = 10,
+	MIN_RX_ADD_ENTRIES_PER_SUBCRQ = 11,
+	MAX_TX_ENTRIES_PER_SUBCRQ = 12,
+	MAX_RX_ADD_ENTRIES_PER_SUBCRQ = 13,
+	REQ_TX_ENTRIES_PER_SUBCRQ = 14,
+	REQ_RX_ADD_ENTRIES_PER_SUBCRQ = 15,
+	TCP_IP_OFFLOAD = 16,
+	PROMISC_REQUESTED = 17,
+	PROMISC_SUPPORTED = 18,
+	MIN_MTU = 19,
+	MAX_MTU = 20,
+	REQ_MTU = 21,
+	MAX_MULTICAST_FILTERS = 22,
+	VLAN_HEADER_INSERTION = 23,
+	MAX_TX_SG_ENTRIES = 25,
+	RX_SG_SUPPORTED = 26,
+	RX_SG_REQUESTED = 27,
+	OPT_TX_COMP_SUB_QUEUES = 28,
+	OPT_RX_COMP_QUEUES = 29,
+	OPT_RX_BUFADD_Q_PER_RX_COMP_Q = 30,
+	OPT_TX_ENTRIES_PER_SUBCRQ = 31,
+	OPT_RXBA_ENTRIES_PER_SUBCRQ = 32,
+	TX_RX_DESC_REQ = 33,
+};
+
+enum ibmvnic_error_cause {
+	ADAPTER_PROBLEM = 0,
+	BUS_PROBLEM = 1,
+	FW_PROBLEM = 2,
+	DD_PROBLEM = 3,
+	EEH_RECOVERY = 4,
+	FW_UPDATED = 5,
+	LOW_MEMORY = 6,
+};
+
+enum ibmvnic_commands {
+	VERSION_EXCHANGE = 0x01,
+	VERSION_EXCHANGE_RSP = 0x81,
+	QUERY_CAPABILITY = 0x02,
+	QUERY_CAPABILITY_RSP = 0x82,
+	REQUEST_CAPABILITY = 0x03,
+	REQUEST_CAPABILITY_RSP = 0x83,
+	LOGIN = 0x04,
+	LOGIN_RSP = 0x84,
+	QUERY_PHYS_PARMS = 0x05,
+	QUERY_PHYS_PARMS_RSP = 0x85,
+	QUERY_PHYS_CAPABILITIES = 0x06,
+	QUERY_PHYS_CAPABILITIES_RSP = 0x86,
+	SET_PHYS_PARMS = 0x07,
+	SET_PHYS_PARMS_RSP = 0x87,
+	ERROR_INDICATION = 0x08,
+	REQUEST_ERROR_INFO = 0x09,
+	REQUEST_ERROR_RSP = 0x89,
+	REQUEST_DUMP_SIZE = 0x0A,
+	REQUEST_DUMP_SIZE_RSP = 0x8A,
+	REQUEST_DUMP = 0x0B,
+	REQUEST_DUMP_RSP = 0x8B,
+	LOGICAL_LINK_STATE = 0x0C,
+	LOGICAL_LINK_STATE_RSP = 0x8C,
+	REQUEST_STATISTICS = 0x0D,
+	REQUEST_STATISTICS_RSP = 0x8D,
+	REQUEST_RAS_COMP_NUM = 0x0E,
+	REQUEST_RAS_COMP_NUM_RSP = 0x8E,
+	REQUEST_RAS_COMPS = 0x0F,
+	REQUEST_RAS_COMPS_RSP = 0x8F,
+	CONTROL_RAS = 0x10,
+	CONTROL_RAS_RSP = 0x90,
+	COLLECT_FW_TRACE = 0x11,
+	COLLECT_FW_TRACE_RSP = 0x91,
+	LINK_STATE_INDICATION = 0x12,
+	CHANGE_MAC_ADDR = 0x13,
+	CHANGE_MAC_ADDR_RSP = 0x93,
+	MULTICAST_CTRL = 0x14,
+	MULTICAST_CTRL_RSP = 0x94,
+	GET_VPD_SIZE = 0x15,
+	GET_VPD_SIZE_RSP = 0x95,
+	GET_VPD = 0x16,
+	GET_VPD_RSP = 0x96,
+	TUNE = 0x17,
+	TUNE_RSP = 0x97,
+	QUERY_IP_OFFLOAD = 0x18,
+	QUERY_IP_OFFLOAD_RSP = 0x98,
+	CONTROL_IP_OFFLOAD = 0x19,
+	CONTROL_IP_OFFLOAD_RSP = 0x99,
+	ACL_CHANGE_INDICATION = 0x1A,
+	ACL_QUERY = 0x1B,
+	ACL_QUERY_RSP = 0x9B,
+	REQUEST_DEBUG_STATS = 0x1C,
+	REQUEST_DEBUG_STATS_RSP = 0x9C,
+	QUERY_MAP = 0x1D,
+	QUERY_MAP_RSP = 0x9D,
+	REQUEST_MAP = 0x1E,
+	REQUEST_MAP_RSP = 0x9E,
+	REQUEST_UNMAP = 0x1F,
+	REQUEST_UNMAP_RSP = 0x9F,
+	VLAN_CTRL = 0x20,
+	VLAN_CTRL_RSP = 0xA0,
+};
+
+enum ibmvnic_crq_type {
+	IBMVNIC_CRQ_CMD			= 0x80,
+	IBMVNIC_CRQ_CMD_RSP		= 0x80,
+	IBMVNIC_CRQ_INIT_CMD		= 0xC0,
+	IBMVNIC_CRQ_INIT_RSP		= 0xC0,
+	IBMVNIC_CRQ_XPORT_EVENT		= 0xFF,
+};
+
+enum ibmvfc_crq_format {
+	IBMVNIC_CRQ_INIT                 = 0x01,
+	IBMVNIC_CRQ_INIT_COMPLETE        = 0x02,
+	IBMVNIC_PARTITION_MIGRATED       = 0x06,
+};
+
+struct ibmvnic_crq_queue {
+	union ibmvnic_crq *msgs;
+	int size, cur;
+	dma_addr_t msg_token;
+	spinlock_t lock;
+};
+
+union sub_crq {
+	struct ibmvnic_generic_scrq generic;
+	struct ibmvnic_tx_comp_desc tx_comp;
+	struct ibmvnic_tx_desc v1;
+	struct ibmvnic_hdr_desc hdr;
+	struct ibmvnic_hdr_ext_desc hdr_ext;
+	struct ibmvnic_sge_desc sge;
+	struct ibmvnic_rx_comp_desc rx_comp;
+	struct ibmvnic_rx_buff_add_desc rx_add;
+};
+
+struct ibmvnic_sub_crq_queue {
+	union sub_crq *msgs;
+	int size, cur;
+	dma_addr_t msg_token;
+	unsigned long crq_num;
+	unsigned long hw_irq;
+	unsigned int irq;
+	unsigned int pool_index;
+	int scrq_num;
+	spinlock_t lock;
+	struct sk_buff *rx_skb_top;
+	struct ibmvnic_adapter *adapter;
+};
+
+struct ibmvnic_long_term_buff {
+	unsigned char *buff;
+	dma_addr_t addr;
+	u64 size;
+	u8 map_id;
+};
+
+struct ibmvnic_tx_buff {
+	struct sk_buff *skb;
+	dma_addr_t data_dma[IBMVNIC_MAX_FRAGS_PER_CRQ];
+	unsigned int data_len[IBMVNIC_MAX_FRAGS_PER_CRQ];
+	int index;
+	int pool_index;
+	bool last_frag;
+	bool used_bounce;
+};
+
+struct ibmvnic_tx_pool {
+	struct ibmvnic_tx_buff *tx_buff;
+	int *free_map;
+	int consumer_index;
+	int producer_index;
+	wait_queue_head_t ibmvnic_tx_comp_q;
+	struct task_struct *work_thread;
+	struct ibmvnic_long_term_buff long_term_buff;
+};
+
+struct ibmvnic_rx_buff {
+	struct sk_buff *skb;
+	dma_addr_t dma;
+	unsigned char *data;
+	int size;
+	int pool_index;
+};
+
+struct ibmvnic_rx_pool {
+	struct ibmvnic_rx_buff *rx_buff;
+	int size;
+	int index;
+	int buff_size;
+	atomic_t available;
+	int *free_map;
+	int next_free;
+	int next_alloc;
+	int active;
+	struct ibmvnic_long_term_buff long_term_buff;
+};
+
+struct ibmvnic_error_buff {
+	char *buff;
+	dma_addr_t dma;
+	int len;
+	struct list_head list;
+	__be32 error_id;
+};
+
+struct ibmvnic_fw_comp_internal {
+	struct ibmvnic_adapter *adapter;
+	int num;
+	struct debugfs_blob_wrapper desc_blob;
+	int paused;
+};
+
+struct ibmvnic_inflight_cmd {
+	union ibmvnic_crq crq;
+	struct list_head list;
+};
+
+struct ibmvnic_adapter {
+	struct vio_dev *vdev;
+	struct net_device *netdev;
+	struct ibmvnic_crq_queue crq;
+	u8 mac_addr[ETH_ALEN];
+	struct ibmvnic_query_ip_offload_buffer ip_offload_buf;
+	dma_addr_t ip_offload_tok;
+	struct ibmvnic_control_ip_offload_buffer ip_offload_ctrl;
+	dma_addr_t ip_offload_ctrl_tok;
+	bool migrated;
+	u32 msg_enable;
+	void *bounce_buffer;
+	int bounce_buffer_size;
+	dma_addr_t bounce_buffer_dma;
+
+	/* Statistics */
+	struct net_device_stats net_stats;
+	struct ibmvnic_statistics stats;
+	dma_addr_t stats_token;
+	struct completion stats_done;
+	spinlock_t stats_lock;
+	int replenish_no_mem;
+	int replenish_add_buff_success;
+	int replenish_add_buff_failure;
+	int replenish_task_cycles;
+	int tx_send_failed;
+	int tx_map_failed;
+
+	int phys_link_state;
+	int logical_link_state;
+
+	/* login data */
+	struct ibmvnic_login_buffer *login_buf;
+	dma_addr_t login_buf_token;
+	int login_buf_sz;
+
+	struct ibmvnic_login_rsp_buffer *login_rsp_buf;
+	dma_addr_t login_rsp_buf_token;
+	int login_rsp_buf_sz;
+
+	atomic_t running_cap_queries;
+
+	struct ibmvnic_sub_crq_queue **tx_scrq;
+	struct ibmvnic_sub_crq_queue **rx_scrq;
+	int requested_caps;
+
+	/* rx structs */
+	struct napi_struct *napi;
+	struct ibmvnic_rx_pool *rx_pool;
+	u64 promisc;
+
+	struct ibmvnic_tx_pool *tx_pool;
+	bool closing;
+	struct completion init_done;
+
+	struct list_head errors;
+	spinlock_t error_list_lock;
+
+	/* debugfs */
+	struct dentry *debugfs_dir;
+	struct dentry *debugfs_dump;
+	struct completion fw_done;
+	char *dump_data;
+	dma_addr_t dump_data_token;
+	int dump_data_size;
+	int ras_comp_num;
+	struct ibmvnic_fw_component *ras_comps;
+	struct ibmvnic_fw_comp_internal *ras_comp_int;
+	dma_addr_t ras_comps_tok;
+	struct dentry *ras_comps_ent;
+
+	/* in-flight commands that allocate and/or map memory*/
+	struct list_head inflight;
+	spinlock_t inflight_lock;
+
+	/* partner capabilities */
+	u64 min_tx_queues;
+	u64 min_rx_queues;
+	u64 min_rx_add_queues;
+	u64 max_tx_queues;
+	u64 max_rx_queues;
+	u64 max_rx_add_queues;
+	u64 req_tx_queues;
+	u64 req_rx_queues;
+	u64 req_rx_add_queues;
+	u64 min_tx_entries_per_subcrq;
+	u64 min_rx_add_entries_per_subcrq;
+	u64 max_tx_entries_per_subcrq;
+	u64 max_rx_add_entries_per_subcrq;
+	u64 req_tx_entries_per_subcrq;
+	u64 req_rx_add_entries_per_subcrq;
+	u64 tcp_ip_offload;
+	u64 promisc_requested;
+	u64 promisc_supported;
+	u64 min_mtu;
+	u64 max_mtu;
+	u64 req_mtu;
+	u64 max_multicast_filters;
+	u64 vlan_header_insertion;
+	u64 max_tx_sg_entries;
+	u64 rx_sg_supported;
+	u64 rx_sg_requested;
+	u64 opt_tx_comp_sub_queues;
+	u64 opt_rx_comp_queues;
+	u64 opt_rx_bufadd_q_per_rx_comp_q;
+	u64 opt_tx_entries_per_subcrq;
+	u64 opt_rxba_entries_per_subcrq;
+	__be64 tx_rx_desc_req;
+	u8 map_id;
+};