Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 1657 insertions, 0 deletions

diff --git a/drivers/net/mpipe/mpipe_tilegx.c b/drivers/net/mpipe/mpipe_tilegx.c
new file mode 100644
index 00000000..adcbc19e
--- /dev/null
+++ b/drivers/net/mpipe/mpipe_tilegx.c
@@ -0,0 +1,1657 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 EZchip Semiconductor Ltd. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of EZchip Semiconductor nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <unistd.h>
+
+#include <rte_eal.h>
+#include <rte_dev.h>
+#include <rte_eal_memconfig.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_cycles.h>
+
+#include <arch/mpipe_xaui_def.h>
+#include <arch/mpipe_gbe_def.h>
+
+#include <gxio/mpipe.h>
+
+#ifdef RTE_LIBRTE_MPIPE_PMD_DEBUG
+#define PMD_DEBUG_RX(...)	RTE_LOG(DEBUG, PMD, __VA_ARGS__)
+#define PMD_DEBUG_TX(...)	RTE_LOG(DEBUG, PMD, __VA_ARGS__)
+#else
+#define PMD_DEBUG_RX(...)
+#define PMD_DEBUG_TX(...)
+#endif
+
+#define MPIPE_MAX_CHANNELS		128
+#define MPIPE_TX_MAX_QUEUES		128
+#define MPIPE_RX_MAX_QUEUES		16
+#define MPIPE_TX_DESCS			512
+#define MPIPE_RX_BUCKETS		256
+#define MPIPE_RX_STACK_SIZE		65536
+#define MPIPE_RX_IP_ALIGN		2
+#define MPIPE_BSM_ALIGN			128
+
+#define MPIPE_LINK_UPDATE_TIMEOUT	10	/*  s */
+#define MPIPE_LINK_UPDATE_INTERVAL	100000	/* us */
+
+struct mpipe_channel_config {
+	int enable;
+	int first_bucket;
+	int num_buckets;
+	int head_room;
+	gxio_mpipe_rules_stacks_t stacks;
+};
+
+struct mpipe_context {
+	rte_spinlock_t        lock;
+	gxio_mpipe_context_t  context;
+	struct mpipe_channel_config channels[MPIPE_MAX_CHANNELS];
+};
+
+/* Per-core local data. */
+struct mpipe_local {
+	int mbuf_push_debt[RTE_MAX_ETHPORTS];	/* Buffer push debt. */
+} __rte_cache_aligned;
+
+#define MPIPE_BUF_DEBT_THRESHOLD	32
+static __thread struct mpipe_local mpipe_local;
+static struct mpipe_context mpipe_contexts[GXIO_MPIPE_INSTANCE_MAX];
+static int mpipe_instances;
+static const char *drivername = "MPIPE PMD";
+
+/* Per queue statistics. */
+struct mpipe_queue_stats {
+	uint64_t packets, bytes, errors, nomem;
+};
+
+/* Common tx/rx queue fields. */
+struct mpipe_queue {
+	struct mpipe_dev_priv *priv;	/* "priv" data of its device. */
+	uint16_t nb_desc;		/* Number of tx descriptors. */
+	uint16_t port_id;		/* Device index. */
+	uint16_t stat_idx;		/* Queue stats index. */
+	uint8_t queue_idx;		/* Queue index. */
+	uint8_t link_status;		/* 0 = link down. */
+	struct mpipe_queue_stats stats;	/* Stat data for the queue. */
+};
+
+/* Transmit queue description. */
+struct mpipe_tx_queue {
+	struct mpipe_queue q;		/* Common stuff. */
+};
+
+/* Receive queue description. */
+struct mpipe_rx_queue {
+	struct mpipe_queue q;		/* Common stuff. */
+	gxio_mpipe_iqueue_t iqueue;	/* mPIPE iqueue. */
+	gxio_mpipe_idesc_t *next_desc;	/* Next idesc to process. */
+	int avail_descs;		/* Number of available descs. */
+	void *rx_ring_mem;		/* DMA ring memory. */
+};
+
+struct mpipe_dev_priv {
+	gxio_mpipe_context_t *context;	/* mPIPE context. */
+	gxio_mpipe_link_t link;		/* mPIPE link for the device. */
+	gxio_mpipe_equeue_t equeue;	/* mPIPE equeue. */
+	unsigned equeue_size;		/* mPIPE equeue desc count. */
+	int instance;			/* mPIPE instance. */
+	int ering;			/* mPIPE eDMA ring. */
+	int stack;			/* mPIPE buffer stack. */
+	int channel;			/* Device channel. */
+	int port_id;			/* DPDK port index. */
+	struct rte_eth_dev *eth_dev;	/* DPDK device. */
+	struct rte_mbuf **tx_comps;	/* TX completion array. */
+	struct rte_mempool *rx_mpool;	/* mpool used by the rx queues. */
+	unsigned rx_offset;		/* Receive head room. */
+	unsigned rx_size_code;		/* mPIPE rx buffer size code. */
+	int is_xaui:1,			/* Is this an xgbe or gbe? */
+	    initialized:1,		/* Initialized port? */
+	    running:1;			/* Running port? */
+	struct ether_addr mac_addr;	/* MAC address. */
+	unsigned nb_rx_queues;		/* Configured tx queues. */
+	unsigned nb_tx_queues;		/* Configured rx queues. */
+	int first_bucket;		/* mPIPE bucket start index. */
+	int first_ring;			/* mPIPE notif ring start index. */
+	int notif_group;		/* mPIPE notif group. */
+	rte_atomic32_t dp_count __rte_cache_aligned;	/* DP Entry count. */
+	int tx_stat_mapping[RTE_ETHDEV_QUEUE_STAT_CNTRS];
+	int rx_stat_mapping[RTE_ETHDEV_QUEUE_STAT_CNTRS];
+};
+
+#define mpipe_priv(dev)			\
+	((struct mpipe_dev_priv*)(dev)->data->dev_private)
+
+#define mpipe_name(priv)		\
+	((priv)->eth_dev->data->name)
+
+#define mpipe_rx_queue(priv, n)		\
+	((struct mpipe_rx_queue *)(priv)->eth_dev->data->rx_queues[n])
+
+#define mpipe_tx_queue(priv, n)		\
+	((struct mpipe_tx_queue *)(priv)->eth_dev->data->tx_queues[n])
+
+static void
+mpipe_xmit_flush(struct mpipe_dev_priv *priv);
+
+static void
+mpipe_recv_flush(struct mpipe_dev_priv *priv);
+
+static int mpipe_equeue_sizes[] = {
+	[GXIO_MPIPE_EQUEUE_ENTRY_512]	= 512,
+	[GXIO_MPIPE_EQUEUE_ENTRY_2K]	= 2048,
+	[GXIO_MPIPE_EQUEUE_ENTRY_8K]	= 8192,
+	[GXIO_MPIPE_EQUEUE_ENTRY_64K]	= 65536,
+};
+
+static int mpipe_iqueue_sizes[] = {
+	[GXIO_MPIPE_IQUEUE_ENTRY_128]	= 128,
+	[GXIO_MPIPE_IQUEUE_ENTRY_512]	= 512,
+	[GXIO_MPIPE_IQUEUE_ENTRY_2K]	= 2048,
+	[GXIO_MPIPE_IQUEUE_ENTRY_64K]	= 65536,
+};
+
+static int mpipe_buffer_sizes[] = {
+	[GXIO_MPIPE_BUFFER_SIZE_128]	= 128,
+	[GXIO_MPIPE_BUFFER_SIZE_256]	= 256,
+	[GXIO_MPIPE_BUFFER_SIZE_512]	= 512,
+	[GXIO_MPIPE_BUFFER_SIZE_1024]	= 1024,
+	[GXIO_MPIPE_BUFFER_SIZE_1664]	= 1664,
+	[GXIO_MPIPE_BUFFER_SIZE_4096]	= 4096,
+	[GXIO_MPIPE_BUFFER_SIZE_10368]	= 10368,
+	[GXIO_MPIPE_BUFFER_SIZE_16384]	= 16384,
+};
+
+static gxio_mpipe_context_t *
+mpipe_context(int instance)
+{
+	if (instance < 0 || instance >= mpipe_instances)
+		return NULL;
+	return &mpipe_contexts[instance].context;
+}
+
+static int mpipe_channel_config(int instance, int channel,
+				struct mpipe_channel_config *config)
+{
+	struct mpipe_channel_config *data;
+	struct mpipe_context *context;
+	gxio_mpipe_rules_t rules;
+	int idx, rc = 0;
+
+	if (instance < 0 || instance >= mpipe_instances ||
+	    channel < 0 || channel >= MPIPE_MAX_CHANNELS)
+		return -EINVAL;
+
+	context = &mpipe_contexts[instance];
+
+	rte_spinlock_lock(&context->lock);
+
+	gxio_mpipe_rules_init(&rules, &context->context);
+
+	for (idx = 0; idx < MPIPE_MAX_CHANNELS; idx++) {
+		data = (channel == idx) ? config : &context->channels[idx];
+
+		if (!data->enable)
+			continue;
+
+		rc = gxio_mpipe_rules_begin(&rules, data->first_bucket,
+					    data->num_buckets, &data->stacks);
+		if (rc < 0) {
+			goto done;
+		}
+
+		rc = gxio_mpipe_rules_add_channel(&rules, idx);
+		if (rc < 0) {
+			goto done;
+		}
+
+		rc = gxio_mpipe_rules_set_headroom(&rules, data->head_room);
+		if (rc < 0) {
+			goto done;
+		}
+	}
+
+	rc = gxio_mpipe_rules_commit(&rules);
+	if (rc == 0) {
+		memcpy(&context->channels[channel], config, sizeof(*config));
+	}
+
+done:
+	rte_spinlock_unlock(&context->lock);
+
+	return rc;
+}
+
+static int
+mpipe_get_size_index(int *array, int count, int size,
+		     bool roundup)
+{
+	int i, last = -1;
+
+	for (i = 0; i < count && array[i] < size; i++) {
+		if (array[i])
+			last = i;
+	}
+
+	if (roundup)
+		return i < count ? (int)i : -ENOENT;
+	else
+		return last >= 0 ? last : -ENOENT;
+}
+
+static int
+mpipe_calc_size(int *array, int count, int size)
+{
+	int index = mpipe_get_size_index(array, count, size, 1);
+	return index < 0 ? index : array[index];
+}
+
+static int mpipe_equeue_size(int size)
+{
+	int result;
+	result = mpipe_calc_size(mpipe_equeue_sizes,
+				 RTE_DIM(mpipe_equeue_sizes), size);
+	return result;
+}
+
+static int mpipe_iqueue_size(int size)
+{
+	int result;
+	result = mpipe_calc_size(mpipe_iqueue_sizes,
+				 RTE_DIM(mpipe_iqueue_sizes), size);
+	return result;
+}
+
+static int mpipe_buffer_size_index(int size)
+{
+	int result;
+	result = mpipe_get_size_index(mpipe_buffer_sizes,
+				      RTE_DIM(mpipe_buffer_sizes), size, 0);
+	return result;
+}
+
+static inline int
+mpipe_dev_atomic_read_link_status(struct rte_eth_dev *dev,
+				  struct rte_eth_link *link)
+{
+	struct rte_eth_link *dst = link;
+	struct rte_eth_link *src = &(dev->data->dev_link);
+
+	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
+				*(uint64_t *)src) == 0)
+		return -1;
+
+	return 0;
+}
+
+static inline int
+mpipe_dev_atomic_write_link_status(struct rte_eth_dev *dev,
+				   struct rte_eth_link *link)
+{
+	struct rte_eth_link *dst = &(dev->data->dev_link);
+	struct rte_eth_link *src = link;
+
+	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
+				*(uint64_t *)src) == 0)
+		return -1;
+
+	return 0;
+}
+
+static void
+mpipe_infos_get(struct rte_eth_dev *dev __rte_unused,
+		struct rte_eth_dev_info *dev_info)
+{
+	dev_info->min_rx_bufsize  = 128;
+	dev_info->max_rx_pktlen   = 1518;
+	dev_info->max_tx_queues   = MPIPE_TX_MAX_QUEUES;
+	dev_info->max_rx_queues   = MPIPE_RX_MAX_QUEUES;
+	dev_info->max_mac_addrs   = 1;
+	dev_info->rx_offload_capa = 0;
+	dev_info->tx_offload_capa = 0;
+}
+
+static int
+mpipe_configure(struct rte_eth_dev *dev)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+
+	if (dev->data->nb_tx_queues > MPIPE_TX_MAX_QUEUES) {
+		RTE_LOG(ERR, PMD, "%s: Too many tx queues: %d > %d\n",
+			mpipe_name(priv), dev->data->nb_tx_queues,
+			MPIPE_TX_MAX_QUEUES);
+		return -EINVAL;
+	}
+	priv->nb_tx_queues = dev->data->nb_tx_queues;
+
+	if (dev->data->nb_rx_queues > MPIPE_RX_MAX_QUEUES) {
+		RTE_LOG(ERR, PMD, "%s: Too many rx queues: %d > %d\n",
+			mpipe_name(priv), dev->data->nb_rx_queues,
+			MPIPE_RX_MAX_QUEUES);
+	}
+	priv->nb_rx_queues = dev->data->nb_rx_queues;
+
+	return 0;
+}
+
+static inline int
+mpipe_link_compare(struct rte_eth_link *link1,
+		   struct rte_eth_link *link2)
+{
+	return (*(uint64_t *)link1 == *(uint64_t *)link2)
+		? -1 : 0;
+}
+
+static int
+mpipe_link_update(struct rte_eth_dev *dev, int wait_to_complete)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	struct rte_eth_link old, new;
+	int64_t state, speed;
+	int count, rc;
+
+	memset(&old, 0, sizeof(old));
+	memset(&new, 0, sizeof(new));
+	mpipe_dev_atomic_read_link_status(dev, &old);
+
+	for (count = 0, rc = 0; count < MPIPE_LINK_UPDATE_TIMEOUT; count++) {
+		if (!priv->initialized)
+			break;
+
+		state = gxio_mpipe_link_get_attr(&priv->link,
+						 GXIO_MPIPE_LINK_CURRENT_STATE);
+		if (state < 0)
+			break;
+
+		speed = state & GXIO_MPIPE_LINK_SPEED_MASK;
+
+		new.link_autoneg = (dev->data->dev_conf.link_speeds &
+				ETH_LINK_SPEED_AUTONEG);
+		if (speed == GXIO_MPIPE_LINK_1G) {
+			new.link_speed = ETH_SPEED_NUM_1G;
+			new.link_duplex = ETH_LINK_FULL_DUPLEX;
+			new.link_status = ETH_LINK_UP;
+		} else if (speed == GXIO_MPIPE_LINK_10G) {
+			new.link_speed = ETH_SPEED_NUM_10G;
+			new.link_duplex = ETH_LINK_FULL_DUPLEX;
+			new.link_status = ETH_LINK_UP;
+		}
+
+		rc = mpipe_link_compare(&old, &new);
+		if (rc == 0 || !wait_to_complete)
+			break;
+
+		rte_delay_us(MPIPE_LINK_UPDATE_INTERVAL);
+	}
+
+	mpipe_dev_atomic_write_link_status(dev, &new);
+	return rc;
+}
+
+static int
+mpipe_set_link(struct rte_eth_dev *dev, int up)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	int rc;
+
+	rc = gxio_mpipe_link_set_attr(&priv->link,
+				      GXIO_MPIPE_LINK_DESIRED_STATE,
+				      up ? GXIO_MPIPE_LINK_ANYSPEED : 0);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to set link %s.\n",
+			mpipe_name(priv), up ? "up" : "down");
+	} else {
+		mpipe_link_update(dev, 0);
+	}
+
+	return rc;
+}
+
+static int
+mpipe_set_link_up(struct rte_eth_dev *dev)
+{
+	return mpipe_set_link(dev, 1);
+}
+
+static int
+mpipe_set_link_down(struct rte_eth_dev *dev)
+{
+	return mpipe_set_link(dev, 0);
+}
+
+static inline void
+mpipe_dp_enter(struct mpipe_dev_priv *priv)
+{
+	__insn_mtspr(SPR_DSTREAM_PF, 0);
+	rte_atomic32_inc(&priv->dp_count);
+}
+
+static inline void
+mpipe_dp_exit(struct mpipe_dev_priv *priv)
+{
+	rte_atomic32_dec(&priv->dp_count);
+}
+
+static inline void
+mpipe_dp_wait(struct mpipe_dev_priv *priv)
+{
+	while (rte_atomic32_read(&priv->dp_count) != 0) {
+		rte_pause();
+	}
+}
+
+static inline int
+mpipe_mbuf_stack_index(struct mpipe_dev_priv *priv, struct rte_mbuf *mbuf)
+{
+	return (mbuf->port < RTE_MAX_ETHPORTS) ?
+		mpipe_priv(&rte_eth_devices[mbuf->port])->stack :
+		priv->stack;
+}
+
+static inline struct rte_mbuf *
+mpipe_recv_mbuf(struct mpipe_dev_priv *priv, gxio_mpipe_idesc_t *idesc,
+		int in_port)
+{
+	void *va = gxio_mpipe_idesc_get_va(idesc);
+	uint16_t size = gxio_mpipe_idesc_get_xfer_size(idesc);
+	struct rte_mbuf *mbuf = RTE_PTR_SUB(va, priv->rx_offset);
+
+	rte_pktmbuf_reset(mbuf);
+	mbuf->data_off = (uintptr_t)va - (uintptr_t)mbuf->buf_addr;
+	mbuf->port     = in_port;
+	mbuf->data_len = size;
+	mbuf->pkt_len  = size;
+	mbuf->hash.rss = gxio_mpipe_idesc_get_flow_hash(idesc);
+
+	PMD_DEBUG_RX("%s: RX mbuf %p, buffer %p, buf_addr %p, size %d\n",
+		     mpipe_name(priv), mbuf, va, mbuf->buf_addr, size);
+
+	return mbuf;
+}
+
+static inline void
+mpipe_recv_push(struct mpipe_dev_priv *priv, struct rte_mbuf *mbuf)
+{
+	const int offset = RTE_PKTMBUF_HEADROOM + MPIPE_RX_IP_ALIGN;
+	void *buf_addr = RTE_PTR_ADD(mbuf->buf_addr, offset);
+
+	gxio_mpipe_push_buffer(priv->context, priv->stack, buf_addr);
+	PMD_DEBUG_RX("%s: Pushed mbuf %p, buffer %p into stack %d\n",
+		     mpipe_name(priv), mbuf, buf_addr, priv->stack);
+}
+
+static inline void
+mpipe_recv_fill_stack(struct mpipe_dev_priv *priv, int count)
+{
+	struct rte_mbuf *mbuf;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		mbuf = __rte_mbuf_raw_alloc(priv->rx_mpool);
+		if (!mbuf)
+			break;
+		mpipe_recv_push(priv, mbuf);
+	}
+
+	PMD_DEBUG_RX("%s: Filled %d/%d buffers\n", mpipe_name(priv), i, count);
+}
+
+static inline void
+mpipe_recv_flush_stack(struct mpipe_dev_priv *priv)
+{
+	const int offset = priv->rx_offset & ~RTE_MEMPOOL_ALIGN_MASK;
+	uint8_t in_port = priv->port_id;
+	struct rte_mbuf *mbuf;
+	void *va;
+
+	while (1) {
+		va = gxio_mpipe_pop_buffer(priv->context, priv->stack);
+		if (!va)
+			break;
+		mbuf = RTE_PTR_SUB(va, offset);
+
+		PMD_DEBUG_RX("%s: Flushing mbuf %p, va %p\n",
+			     mpipe_name(priv), mbuf, va);
+
+		mbuf->data_off    = (uintptr_t)va - (uintptr_t)mbuf->buf_addr;
+		mbuf->refcnt      = 1;
+		mbuf->nb_segs     = 1;
+		mbuf->port        = in_port;
+		mbuf->packet_type = 0;
+		mbuf->data_len    = 0;
+		mbuf->pkt_len     = 0;
+
+		__rte_mbuf_raw_free(mbuf);
+	}
+}
+
+static void
+mpipe_register_segment(struct mpipe_dev_priv *priv, const struct rte_memseg *ms)
+{
+	size_t size = ms->hugepage_sz;
+	uint8_t *addr, *end;
+	int rc;
+
+	for (addr = ms->addr, end = addr + ms->len; addr < end; addr += size) {
+		rc = gxio_mpipe_register_page(priv->context, priv->stack, addr,
+					      size, 0);
+		if (rc < 0)
+			break;
+	}
+
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Could not register memseg @%p, %d.\n",
+			mpipe_name(priv), ms->addr, rc);
+	} else {
+		RTE_LOG(DEBUG, PMD, "%s: Registered segment %p - %p\n",
+			mpipe_name(priv), ms->addr,
+			RTE_PTR_ADD(ms->addr, ms->len - 1));
+	}
+}
+
+static int
+mpipe_recv_init(struct mpipe_dev_priv *priv)
+{
+	const struct rte_memseg *seg = rte_eal_get_physmem_layout();
+	size_t stack_size;
+	void *stack_mem;
+	int rc;
+
+	if (!priv->rx_mpool) {
+		RTE_LOG(ERR, PMD, "%s: No buffer pool.\n",
+			mpipe_name(priv));
+		return -ENODEV;
+	}
+
+	/* Allocate one NotifRing for each queue. */
+	rc = gxio_mpipe_alloc_notif_rings(priv->context, MPIPE_RX_MAX_QUEUES,
+					  0, 0);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate notif rings.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+	priv->first_ring = rc;
+
+	/* Allocate a NotifGroup. */
+	rc = gxio_mpipe_alloc_notif_groups(priv->context, 1, 0, 0);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate rx group.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+	priv->notif_group = rc;
+
+	/* Allocate required buckets. */
+	rc = gxio_mpipe_alloc_buckets(priv->context, MPIPE_RX_BUCKETS, 0, 0);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate buckets.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+	priv->first_bucket = rc;
+
+	rc = gxio_mpipe_alloc_buffer_stacks(priv->context, 1, 0, 0);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate buffer stack.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+	priv->stack = rc;
+
+	while (seg && seg->addr)
+		mpipe_register_segment(priv, seg++);
+
+	stack_size = gxio_mpipe_calc_buffer_stack_bytes(MPIPE_RX_STACK_SIZE);
+	stack_mem = rte_zmalloc(NULL, stack_size, 65536);
+	if (!stack_mem) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate buffer memory.\n",
+			mpipe_name(priv));
+		return -ENOMEM;
+	} else {
+		RTE_LOG(DEBUG, PMD, "%s: Buffer stack memory %p - %p.\n",
+			mpipe_name(priv), stack_mem,
+			RTE_PTR_ADD(stack_mem, stack_size - 1));
+	}
+
+	rc = gxio_mpipe_init_buffer_stack(priv->context, priv->stack,
+					  priv->rx_size_code, stack_mem,
+					  stack_size, 0);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to initialize buffer stack.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+
+	return 0;
+}
+
+static int
+mpipe_xmit_init(struct mpipe_dev_priv *priv)
+{
+	size_t ring_size;
+	void *ring_mem;
+	int rc;
+
+	/* Allocate eDMA ring. */
+	rc = gxio_mpipe_alloc_edma_rings(priv->context, 1, 0, 0);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to alloc tx ring.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+	priv->ering = rc;
+
+	rc = mpipe_equeue_size(MPIPE_TX_DESCS);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Cannot allocate %d equeue descs.\n",
+			mpipe_name(priv), (int)MPIPE_TX_DESCS);
+		return -ENOMEM;
+	}
+	priv->equeue_size = rc;
+
+	/* Initialize completion array. */
+	ring_size = sizeof(priv->tx_comps[0]) * priv->equeue_size;
+	priv->tx_comps = rte_zmalloc(NULL, ring_size, RTE_CACHE_LINE_SIZE);
+	if (!priv->tx_comps) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate egress comps.\n",
+			mpipe_name(priv));
+		return -ENOMEM;
+	}
+
+	/* Allocate eDMA ring memory. */
+	ring_size = sizeof(gxio_mpipe_edesc_t) * priv->equeue_size;
+	ring_mem = rte_zmalloc(NULL, ring_size, ring_size);
+	if (!ring_mem) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate egress descs.\n",
+			mpipe_name(priv));
+		return -ENOMEM;
+	} else {
+		RTE_LOG(DEBUG, PMD, "%s: eDMA ring memory %p - %p.\n",
+			mpipe_name(priv), ring_mem,
+			RTE_PTR_ADD(ring_mem, ring_size - 1));
+	}
+
+	/* Initialize eDMA ring. */
+	rc = gxio_mpipe_equeue_init(&priv->equeue, priv->context, priv->ering,
+				    priv->channel, ring_mem, ring_size, 0);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to init equeue\n",
+			mpipe_name(priv));
+		return rc;
+	}
+
+	return 0;
+}
+
+static int
+mpipe_link_init(struct mpipe_dev_priv *priv)
+{
+	int rc;
+
+	/* Open the link. */
+	rc = gxio_mpipe_link_open(&priv->link, priv->context,
+				  mpipe_name(priv), GXIO_MPIPE_LINK_AUTO_NONE);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to open link.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+
+	/* Get the channel index. */
+	rc = gxio_mpipe_link_channel(&priv->link);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Bad channel\n",
+			mpipe_name(priv));
+		return rc;
+	}
+	priv->channel = rc;
+
+	return 0;
+}
+
+static int
+mpipe_init(struct mpipe_dev_priv *priv)
+{
+	int rc;
+
+	if (priv->initialized)
+		return 0;
+
+	rc = mpipe_recv_init(priv);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to init rx.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+
+	rc = mpipe_xmit_init(priv);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to init tx.\n",
+			mpipe_name(priv));
+		rte_free(priv);
+		return rc;
+	}
+
+	priv->initialized = 1;
+
+	return 0;
+}
+
+static int
+mpipe_start(struct rte_eth_dev *dev)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	struct mpipe_channel_config config;
+	struct mpipe_rx_queue *rx_queue;
+	struct rte_eth_link eth_link;
+	unsigned queue, buffers = 0;
+	size_t ring_size;
+	void *ring_mem;
+	int rc;
+
+	memset(&eth_link, 0, sizeof(eth_link));
+	mpipe_dev_atomic_write_link_status(dev, &eth_link);
+
+	rc = mpipe_init(priv);
+	if (rc < 0)
+		return rc;
+
+	/* Initialize NotifRings. */
+	for (queue = 0; queue < priv->nb_rx_queues; queue++) {
+		rx_queue = mpipe_rx_queue(priv, queue);
+		ring_size = rx_queue->q.nb_desc * sizeof(gxio_mpipe_idesc_t);
+
+		ring_mem = rte_malloc(NULL, ring_size, ring_size);
+		if (!ring_mem) {
+			RTE_LOG(ERR, PMD, "%s: Failed to alloc rx descs.\n",
+				mpipe_name(priv));
+			return -ENOMEM;
+		} else {
+			RTE_LOG(DEBUG, PMD, "%s: iDMA ring %d memory %p - %p.\n",
+				mpipe_name(priv), queue, ring_mem,
+				RTE_PTR_ADD(ring_mem, ring_size - 1));
+		}
+
+		rc = gxio_mpipe_iqueue_init(&rx_queue->iqueue, priv->context,
+					    priv->first_ring + queue, ring_mem,
+					    ring_size, 0);
+		if (rc < 0) {
+			RTE_LOG(ERR, PMD, "%s: Failed to init rx queue.\n",
+				mpipe_name(priv));
+			return rc;
+		}
+
+		rx_queue->rx_ring_mem = ring_mem;
+		buffers += rx_queue->q.nb_desc;
+	}
+
+	/* Initialize ingress NotifGroup and buckets. */
+	rc = gxio_mpipe_init_notif_group_and_buckets(priv->context,
+			priv->notif_group, priv->first_ring, priv->nb_rx_queues,
+			priv->first_bucket, MPIPE_RX_BUCKETS,
+			GXIO_MPIPE_BUCKET_STATIC_FLOW_AFFINITY);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to init group and buckets.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+
+	/* Configure the classifier to deliver packets from this port. */
+	config.enable = 1;
+	config.first_bucket = priv->first_bucket;
+	config.num_buckets = MPIPE_RX_BUCKETS;
+	memset(&config.stacks, 0xff, sizeof(config.stacks));
+	config.stacks.stacks[priv->rx_size_code] = priv->stack;
+	config.head_room = priv->rx_offset & RTE_MEMPOOL_ALIGN_MASK;
+
+	rc = mpipe_channel_config(priv->instance, priv->channel,
+				  &config);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to setup classifier.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+
+	/* Fill empty buffers into the buffer stack. */
+	mpipe_recv_fill_stack(priv, buffers);
+
+	/* Bring up the link. */
+	mpipe_set_link_up(dev);
+
+	/* Start xmit/recv on queues. */
+	for (queue = 0; queue < priv->nb_tx_queues; queue++)
+		mpipe_tx_queue(priv, queue)->q.link_status = ETH_LINK_UP;
+	for (queue = 0; queue < priv->nb_rx_queues; queue++)
+		mpipe_rx_queue(priv, queue)->q.link_status = ETH_LINK_UP;
+	priv->running = 1;
+
+	return 0;
+}
+
+static void
+mpipe_stop(struct rte_eth_dev *dev)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	struct mpipe_channel_config config;
+	unsigned queue;
+	int rc;
+
+	for (queue = 0; queue < priv->nb_tx_queues; queue++)
+		mpipe_tx_queue(priv, queue)->q.link_status = ETH_LINK_DOWN;
+	for (queue = 0; queue < priv->nb_rx_queues; queue++)
+		mpipe_rx_queue(priv, queue)->q.link_status = ETH_LINK_DOWN;
+
+	/* Make sure the link_status writes land. */
+	rte_wmb();
+
+	/*
+	 * Wait for link_status change to register with straggling datapath
+	 * threads.
+	 */
+	mpipe_dp_wait(priv);
+
+	/* Bring down the link. */
+	mpipe_set_link_down(dev);
+
+	/* Remove classifier rules. */
+	memset(&config, 0, sizeof(config));
+	rc = mpipe_channel_config(priv->instance, priv->channel,
+				  &config);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to stop classifier.\n",
+			mpipe_name(priv));
+	}
+
+	/* Flush completed xmit packets. */
+	mpipe_xmit_flush(priv);
+
+	/* Flush buffer stacks. */
+	mpipe_recv_flush(priv);
+
+	priv->running = 0;
+}
+
+static void
+mpipe_close(struct rte_eth_dev *dev)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	if (priv->running)
+		mpipe_stop(dev);
+}
+
+static void
+mpipe_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	struct mpipe_tx_queue *tx_queue;
+	struct mpipe_rx_queue *rx_queue;
+	unsigned i;
+	uint16_t idx;
+
+	memset(stats, 0, sizeof(*stats));
+
+	for (i = 0; i < priv->nb_tx_queues; i++) {
+		tx_queue = mpipe_tx_queue(priv, i);
+
+		stats->opackets += tx_queue->q.stats.packets;
+		stats->obytes   += tx_queue->q.stats.bytes;
+		stats->oerrors  += tx_queue->q.stats.errors;
+
+		idx = tx_queue->q.stat_idx;
+		if (idx != (uint16_t)-1) {
+			stats->q_opackets[idx] += tx_queue->q.stats.packets;
+			stats->q_obytes[idx]   += tx_queue->q.stats.bytes;
+			stats->q_errors[idx]   += tx_queue->q.stats.errors;
+		}
+	}
+
+	for (i = 0; i < priv->nb_rx_queues; i++) {
+		rx_queue = mpipe_rx_queue(priv, i);
+
+		stats->ipackets  += rx_queue->q.stats.packets;
+		stats->ibytes    += rx_queue->q.stats.bytes;
+		stats->ierrors   += rx_queue->q.stats.errors;
+		stats->rx_nombuf += rx_queue->q.stats.nomem;
+
+		idx = rx_queue->q.stat_idx;
+		if (idx != (uint16_t)-1) {
+			stats->q_ipackets[idx] += rx_queue->q.stats.packets;
+			stats->q_ibytes[idx]   += rx_queue->q.stats.bytes;
+			stats->q_errors[idx]   += rx_queue->q.stats.errors;
+		}
+	}
+}
+
+static void
+mpipe_stats_reset(struct rte_eth_dev *dev)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	struct mpipe_tx_queue *tx_queue;
+	struct mpipe_rx_queue *rx_queue;
+	unsigned i;
+
+	for (i = 0; i < priv->nb_tx_queues; i++) {
+		tx_queue = mpipe_tx_queue(priv, i);
+		memset(&tx_queue->q.stats, 0, sizeof(tx_queue->q.stats));
+	}
+
+	for (i = 0; i < priv->nb_rx_queues; i++) {
+		rx_queue = mpipe_rx_queue(priv, i);
+		memset(&rx_queue->q.stats, 0, sizeof(rx_queue->q.stats));
+	}
+}
+
+static int
+mpipe_queue_stats_mapping_set(struct rte_eth_dev *dev, uint16_t queue_id,
+			      uint8_t stat_idx, uint8_t is_rx)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+
+	if (is_rx) {
+		priv->rx_stat_mapping[stat_idx] = queue_id;
+	} else {
+		priv->tx_stat_mapping[stat_idx] = queue_id;
+	}
+
+	return 0;
+}
+
+static int
+mpipe_tx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
+		     uint16_t nb_desc, unsigned int socket_id __rte_unused,
+		     const struct rte_eth_txconf *tx_conf __rte_unused)
+{
+	struct mpipe_tx_queue *tx_queue = dev->data->tx_queues[queue_idx];
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	uint16_t idx;
+
+	tx_queue = rte_realloc(tx_queue, sizeof(*tx_queue),
+			       RTE_CACHE_LINE_SIZE);
+	if (!tx_queue) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate TX queue.\n",
+			mpipe_name(priv));
+		return -ENOMEM;
+	}
+
+	memset(&tx_queue->q, 0, sizeof(tx_queue->q));
+	tx_queue->q.priv = priv;
+	tx_queue->q.queue_idx = queue_idx;
+	tx_queue->q.port_id = dev->data->port_id;
+	tx_queue->q.nb_desc = nb_desc;
+
+	tx_queue->q.stat_idx = -1;
+	for (idx = 0; idx < RTE_ETHDEV_QUEUE_STAT_CNTRS; idx++) {
+		if (priv->tx_stat_mapping[idx] == queue_idx)
+			tx_queue->q.stat_idx = idx;
+	}
+
+	dev->data->tx_queues[queue_idx] = tx_queue;
+
+	return 0;
+}
+
+static void
+mpipe_tx_queue_release(void *_txq)
+{
+	rte_free(_txq);
+}
+
+static int
+mpipe_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
+		     uint16_t nb_desc, unsigned int socket_id __rte_unused,
+		     const struct rte_eth_rxconf *rx_conf __rte_unused,
+		     struct rte_mempool *mp)
+{
+	struct mpipe_rx_queue *rx_queue = dev->data->rx_queues[queue_idx];
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	uint16_t idx;
+	int size, rc;
+
+	rc = mpipe_iqueue_size(nb_desc);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Cannot allocate %d iqueue descs.\n",
+			mpipe_name(priv), (int)nb_desc);
+		return -ENOMEM;
+	}
+
+	if (rc != nb_desc) {
+		RTE_LOG(WARNING, PMD, "%s: Extending RX descs from %d to %d.\n",
+			mpipe_name(priv), (int)nb_desc, rc);
+		nb_desc = rc;
+	}
+
+	size = sizeof(*rx_queue);
+	rx_queue = rte_realloc(rx_queue, size, RTE_CACHE_LINE_SIZE);
+	if (!rx_queue) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate RX queue.\n",
+			mpipe_name(priv));
+		return -ENOMEM;
+	}
+
+	memset(&rx_queue->q, 0, sizeof(rx_queue->q));
+	rx_queue->q.priv = priv;
+	rx_queue->q.nb_desc = nb_desc;
+	rx_queue->q.port_id = dev->data->port_id;
+	rx_queue->q.queue_idx = queue_idx;
+
+	if (!priv->rx_mpool) {
+		int size = (rte_pktmbuf_data_room_size(mp) -
+			    RTE_PKTMBUF_HEADROOM -
+			    MPIPE_RX_IP_ALIGN);
+
+		priv->rx_offset = (sizeof(struct rte_mbuf) +
+				   rte_pktmbuf_priv_size(mp) +
+				   RTE_PKTMBUF_HEADROOM +
+				   MPIPE_RX_IP_ALIGN);
+		if (size < 0) {
+			RTE_LOG(ERR, PMD, "%s: Bad buffer size %d.\n",
+				mpipe_name(priv),
+				rte_pktmbuf_data_room_size(mp));
+			return -ENOMEM;
+		}
+
+		priv->rx_size_code = mpipe_buffer_size_index(size);
+		priv->rx_mpool = mp;
+	}
+
+	if (priv->rx_mpool != mp) {
+		RTE_LOG(WARNING, PMD, "%s: Ignoring multiple buffer pools.\n",
+			mpipe_name(priv));
+	}
+
+	rx_queue->q.stat_idx = -1;
+	for (idx = 0; idx < RTE_ETHDEV_QUEUE_STAT_CNTRS; idx++) {
+		if (priv->rx_stat_mapping[idx] == queue_idx)
+			rx_queue->q.stat_idx = idx;
+	}
+
+	dev->data->rx_queues[queue_idx] = rx_queue;
+
+	return 0;
+}
+
+static void
+mpipe_rx_queue_release(void *_rxq)
+{
+	rte_free(_rxq);
+}
+
+#define MPIPE_XGBE_ENA_HASH_MULTI	\
+	(1UL << MPIPE_XAUI_RECEIVE_CONFIGURATION__ENA_HASH_MULTI_SHIFT)
+#define MPIPE_XGBE_ENA_HASH_UNI		\
+	(1UL << MPIPE_XAUI_RECEIVE_CONFIGURATION__ENA_HASH_UNI_SHIFT)
+#define MPIPE_XGBE_COPY_ALL		\
+	(1UL << MPIPE_XAUI_RECEIVE_CONFIGURATION__COPY_ALL_SHIFT)
+#define MPIPE_GBE_ENA_MULTI_HASH	\
+	(1UL << MPIPE_GBE_NETWORK_CONFIGURATION__MULTI_HASH_ENA_SHIFT)
+#define MPIPE_GBE_ENA_UNI_HASH		\
+	(1UL << MPIPE_GBE_NETWORK_CONFIGURATION__UNI_HASH_ENA_SHIFT)
+#define MPIPE_GBE_COPY_ALL		\
+	(1UL << MPIPE_GBE_NETWORK_CONFIGURATION__COPY_ALL_SHIFT)
+
+static void
+mpipe_promiscuous_enable(struct rte_eth_dev *dev)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	int64_t reg;
+	int addr;
+
+	if (priv->is_xaui) {
+		addr = MPIPE_XAUI_RECEIVE_CONFIGURATION;
+		reg  = gxio_mpipe_link_mac_rd(&priv->link, addr);
+		reg &= ~MPIPE_XGBE_ENA_HASH_MULTI;
+		reg &= ~MPIPE_XGBE_ENA_HASH_UNI;
+		reg |=  MPIPE_XGBE_COPY_ALL;
+		gxio_mpipe_link_mac_wr(&priv->link, addr, reg);
+	} else {
+		addr = MPIPE_GBE_NETWORK_CONFIGURATION;
+		reg  = gxio_mpipe_link_mac_rd(&priv->link, addr);
+		reg &= ~MPIPE_GBE_ENA_MULTI_HASH;
+		reg &= ~MPIPE_GBE_ENA_UNI_HASH;
+		reg |=  MPIPE_GBE_COPY_ALL;
+		gxio_mpipe_link_mac_wr(&priv->link, addr, reg);
+	}
+}
+
+static void
+mpipe_promiscuous_disable(struct rte_eth_dev *dev)
+{
+	struct mpipe_dev_priv *priv = mpipe_priv(dev);
+	int64_t reg;
+	int addr;
+
+	if (priv->is_xaui) {
+		addr = MPIPE_XAUI_RECEIVE_CONFIGURATION;
+		reg  = gxio_mpipe_link_mac_rd(&priv->link, addr);
+		reg |=  MPIPE_XGBE_ENA_HASH_MULTI;
+		reg |=  MPIPE_XGBE_ENA_HASH_UNI;
+		reg &= ~MPIPE_XGBE_COPY_ALL;
+		gxio_mpipe_link_mac_wr(&priv->link, addr, reg);
+	} else {
+		addr = MPIPE_GBE_NETWORK_CONFIGURATION;
+		reg  = gxio_mpipe_link_mac_rd(&priv->link, addr);
+		reg |=  MPIPE_GBE_ENA_MULTI_HASH;
+		reg |=  MPIPE_GBE_ENA_UNI_HASH;
+		reg &= ~MPIPE_GBE_COPY_ALL;
+		gxio_mpipe_link_mac_wr(&priv->link, addr, reg);
+	}
+}
+
+static const struct eth_dev_ops mpipe_dev_ops = {
+	.dev_infos_get	         = mpipe_infos_get,
+	.dev_configure	         = mpipe_configure,
+	.dev_start	         = mpipe_start,
+	.dev_stop	         = mpipe_stop,
+	.dev_close	         = mpipe_close,
+	.stats_get	         = mpipe_stats_get,
+	.stats_reset	         = mpipe_stats_reset,
+	.queue_stats_mapping_set = mpipe_queue_stats_mapping_set,
+	.tx_queue_setup	         = mpipe_tx_queue_setup,
+	.rx_queue_setup	         = mpipe_rx_queue_setup,
+	.tx_queue_release	 = mpipe_tx_queue_release,
+	.rx_queue_release	 = mpipe_rx_queue_release,
+	.link_update	         = mpipe_link_update,
+	.dev_set_link_up         = mpipe_set_link_up,
+	.dev_set_link_down       = mpipe_set_link_down,
+	.promiscuous_enable      = mpipe_promiscuous_enable,
+	.promiscuous_disable     = mpipe_promiscuous_disable,
+};
+
+static inline void
+mpipe_xmit_null(struct mpipe_dev_priv *priv, int64_t start, int64_t end)
+{
+	gxio_mpipe_edesc_t null_desc = { { .bound = 1, .ns = 1 } };
+	gxio_mpipe_equeue_t *equeue = &priv->equeue;
+	int64_t slot;
+
+	for (slot = start; slot < end; slot++) {
+		gxio_mpipe_equeue_put_at(equeue, null_desc, slot);
+	}
+}
+
+static void
+mpipe_xmit_flush(struct mpipe_dev_priv *priv)
+{
+	gxio_mpipe_equeue_t *equeue = &priv->equeue;
+	int64_t slot;
+
+	/* Post a dummy descriptor and wait for its return. */
+	slot = gxio_mpipe_equeue_reserve(equeue, 1);
+	if (slot < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to reserve stop slot.\n",
+			mpipe_name(priv));
+		return;
+	}
+
+	mpipe_xmit_null(priv, slot, slot + 1);
+
+	while (!gxio_mpipe_equeue_is_complete(equeue, slot, 1)) {
+		rte_pause();
+	}
+
+	for (slot = 0; slot < priv->equeue_size; slot++) {
+		if (priv->tx_comps[slot])
+			rte_pktmbuf_free_seg(priv->tx_comps[slot]);
+	}
+}
+
+static void
+mpipe_recv_flush(struct mpipe_dev_priv *priv)
+{
+	uint8_t in_port = priv->port_id;
+	struct mpipe_rx_queue *rx_queue;
+	gxio_mpipe_iqueue_t *iqueue;
+	gxio_mpipe_idesc_t idesc;
+	struct rte_mbuf *mbuf;
+	unsigned queue;
+
+	/* Release packets on the buffer stack. */
+	mpipe_recv_flush_stack(priv);
+
+	/* Flush packets sitting in recv queues. */
+	for (queue = 0; queue < priv->nb_rx_queues; queue++) {
+		rx_queue = mpipe_rx_queue(priv, queue);
+		iqueue = &rx_queue->iqueue;
+		while (gxio_mpipe_iqueue_try_get(iqueue, &idesc) >= 0) {
+			/* Skip idesc with the 'buffer error' bit set. */
+			if (idesc.be)
+				continue;
+			mbuf = mpipe_recv_mbuf(priv, &idesc, in_port);
+			rte_pktmbuf_free(mbuf);
+		}
+		rte_free(rx_queue->rx_ring_mem);
+	}
+}
+
+static inline uint16_t
+mpipe_do_xmit(struct mpipe_tx_queue *tx_queue, struct rte_mbuf **tx_pkts,
+	      uint16_t nb_pkts)
+{
+	struct mpipe_dev_priv *priv = tx_queue->q.priv;
+	gxio_mpipe_equeue_t *equeue = &priv->equeue;
+	unsigned nb_bytes = 0;
+	unsigned nb_sent = 0;
+	int nb_slots, i;
+	uint8_t port_id;
+
+	PMD_DEBUG_TX("Trying to transmit %d packets on %s:%d.\n",
+		     nb_pkts, mpipe_name(tx_queue->q.priv),
+		     tx_queue->q.queue_idx);
+
+	/* Optimistic assumption that we need exactly one slot per packet. */
+	nb_slots = RTE_MIN(nb_pkts, MPIPE_TX_DESCS / 2);
+
+	do {
+		struct rte_mbuf *mbuf = NULL, *pkt = NULL;
+		int64_t slot;
+
+		/* Reserve eDMA ring slots. */
+		slot = gxio_mpipe_equeue_try_reserve_fast(equeue, nb_slots);
+		if (unlikely(slot < 0)) {
+			break;
+		}
+
+		for (i = 0; i < nb_slots; i++) {
+			unsigned idx = (slot + i) & (priv->equeue_size - 1);
+			rte_prefetch0(priv->tx_comps[idx]);
+		}
+
+		/* Fill up slots with descriptor and completion info. */
+		for (i = 0; i < nb_slots; i++) {
+			unsigned idx = (slot + i) & (priv->equeue_size - 1);
+			gxio_mpipe_edesc_t desc;
+			struct rte_mbuf *next;
+
+			/* Starting on a new packet? */
+			if (likely(!mbuf)) {
+				int room = nb_slots - i;
+
+				pkt = mbuf = tx_pkts[nb_sent];
+
+				/* Bail out if we run out of descs. */
+				if (unlikely(pkt->nb_segs > room))
+					break;
+
+				nb_sent++;
+			}
+
+			/* We have a segment to send. */
+			next = mbuf->next;
+
+			if (priv->tx_comps[idx])
+				rte_pktmbuf_free_seg(priv->tx_comps[idx]);
+
+			port_id = (mbuf->port < RTE_MAX_ETHPORTS) ?
+						mbuf->port : priv->port_id;
+			desc = (gxio_mpipe_edesc_t) { {
+				.va        = rte_pktmbuf_mtod(mbuf, uintptr_t),
+				.xfer_size = rte_pktmbuf_data_len(mbuf),
+				.bound     = next ? 0 : 1,
+				.stack_idx = mpipe_mbuf_stack_index(priv, mbuf),
+				.size      = priv->rx_size_code,
+			} };
+			if (mpipe_local.mbuf_push_debt[port_id] > 0) {
+				mpipe_local.mbuf_push_debt[port_id]--;
+				desc.hwb = 1;
+				priv->tx_comps[idx] = NULL;
+			} else
+				priv->tx_comps[idx] = mbuf;
+
+			nb_bytes += mbuf->data_len;
+			gxio_mpipe_equeue_put_at(equeue, desc, slot + i);
+
+			PMD_DEBUG_TX("%s:%d: Sending packet %p, len %d\n",
+				     mpipe_name(priv),
+				     tx_queue->q.queue_idx,
+				     rte_pktmbuf_mtod(mbuf, void *),
+				     rte_pktmbuf_data_len(mbuf));
+
+			mbuf = next;
+		}
+
+		if (unlikely(nb_sent < nb_pkts)) {
+
+			/* Fill remaining slots with null descriptors. */
+			mpipe_xmit_null(priv, slot + i, slot + nb_slots);
+
+			/*
+			 * Calculate exact number of descriptors needed for
+			 * the next go around.
+			 */
+			nb_slots = 0;
+			for (i = nb_sent; i < nb_pkts; i++) {
+				nb_slots += tx_pkts[i]->nb_segs;
+			}
+
+			nb_slots = RTE_MIN(nb_slots, MPIPE_TX_DESCS / 2);
+		}
+	} while (nb_sent < nb_pkts);
+
+	tx_queue->q.stats.packets += nb_sent;
+	tx_queue->q.stats.bytes   += nb_bytes;
+
+	return nb_sent;
+}
+
+static inline uint16_t
+mpipe_do_recv(struct mpipe_rx_queue *rx_queue, struct rte_mbuf **rx_pkts,
+	      uint16_t nb_pkts)
+{
+	struct mpipe_dev_priv *priv = rx_queue->q.priv;
+	gxio_mpipe_iqueue_t *iqueue = &rx_queue->iqueue;
+	gxio_mpipe_idesc_t *first_idesc, *idesc, *last_idesc;
+	uint8_t in_port = rx_queue->q.port_id;
+	const unsigned look_ahead = 8;
+	int room = nb_pkts, rc = 0;
+	unsigned nb_packets = 0;
+	unsigned nb_dropped = 0;
+	unsigned nb_nomem = 0;
+	unsigned nb_bytes = 0;
+	unsigned nb_descs, i;
+
+	while (room && !rc) {
+		if (rx_queue->avail_descs < room) {
+			rc = gxio_mpipe_iqueue_try_peek(iqueue,
+							&rx_queue->next_desc);
+			rx_queue->avail_descs = rc < 0 ? 0 : rc;
+		}
+
+		if (unlikely(!rx_queue->avail_descs)) {
+			break;
+		}
+
+		nb_descs = RTE_MIN(room, rx_queue->avail_descs);
+
+		first_idesc = rx_queue->next_desc;
+		last_idesc  = first_idesc + nb_descs;
+
+		rx_queue->next_desc   += nb_descs;
+		rx_queue->avail_descs -= nb_descs;
+
+		for (i = 1; i < look_ahead; i++) {
+			rte_prefetch0(first_idesc + i);
+		}
+
+		PMD_DEBUG_RX("%s:%d: Trying to receive %d packets\n",
+			     mpipe_name(rx_queue->q.priv),
+			     rx_queue->q.queue_idx,
+			     nb_descs);
+
+		for (idesc = first_idesc; idesc < last_idesc; idesc++) {
+			struct rte_mbuf *mbuf;
+
+			PMD_DEBUG_RX("%s:%d: processing idesc %d/%d\n",
+				     mpipe_name(priv),
+				     rx_queue->q.queue_idx,
+				     nb_packets, nb_descs);
+
+			rte_prefetch0(idesc + look_ahead);
+
+			PMD_DEBUG_RX("%s:%d: idesc %p, %s%s%s%s%s%s%s%s%s%s"
+				     "size: %d, bkt: %d, chan: %d, ring: %d, sqn: %lu, va: %lu\n",
+				     mpipe_name(priv),
+				     rx_queue->q.queue_idx,
+				     idesc,
+				     idesc->me ? "me, " : "",
+				     idesc->tr ? "tr, " : "",
+				     idesc->ce ? "ce, " : "",
+				     idesc->ct ? "ct, " : "",
+				     idesc->cs ? "cs, " : "",
+				     idesc->nr ? "nr, " : "",
+				     idesc->sq ? "sq, " : "",
+				     idesc->ts ? "ts, " : "",
+				     idesc->ps ? "ps, " : "",
+				     idesc->be ? "be, " : "",
+				     idesc->l2_size,
+				     idesc->bucket_id,
+				     idesc->channel,
+				     idesc->notif_ring,
+				     (unsigned long)idesc->packet_sqn,
+				     (unsigned long)idesc->va);
+
+			if (unlikely(gxio_mpipe_idesc_has_error(idesc))) {
+				nb_dropped++;
+				gxio_mpipe_iqueue_drop(iqueue, idesc);
+				PMD_DEBUG_RX("%s:%d: Descriptor error\n",
+					     mpipe_name(rx_queue->q.priv),
+					     rx_queue->q.queue_idx);
+				continue;
+			}
+
+			if (mpipe_local.mbuf_push_debt[in_port] <
+					MPIPE_BUF_DEBT_THRESHOLD)
+				mpipe_local.mbuf_push_debt[in_port]++;
+			else {
+				mbuf = __rte_mbuf_raw_alloc(priv->rx_mpool);
+				if (unlikely(!mbuf)) {
+					nb_nomem++;
+					gxio_mpipe_iqueue_drop(iqueue, idesc);
+					PMD_DEBUG_RX("%s:%d: alloc failure\n",
+					     mpipe_name(rx_queue->q.priv),
+					     rx_queue->q.queue_idx);
+					continue;
+				}
+
+				mpipe_recv_push(priv, mbuf);
+			}
+
+			/* Get and setup the mbuf for the received packet. */
+			mbuf = mpipe_recv_mbuf(priv, idesc, in_port);
+
+			/* Update results and statistics counters. */
+			rx_pkts[nb_packets] = mbuf;
+			nb_bytes += mbuf->pkt_len;
+			nb_packets++;
+		}
+
+		/*
+		 * We release the ring in bursts, but do not track and release
+		 * buckets.  This therefore breaks dynamic flow affinity, but
+		 * we always operate in static affinity mode, and so we're OK
+		 * with this optimization.
+		 */
+		gxio_mpipe_iqueue_advance(iqueue, nb_descs);
+		gxio_mpipe_credit(iqueue->context, iqueue->ring, -1, nb_descs);
+
+		/*
+		 * Go around once more if we haven't yet peeked the queue, and
+		 * if we have more room to receive.
+		 */
+		room = nb_pkts - nb_packets;
+	}
+
+	rx_queue->q.stats.packets += nb_packets;
+	rx_queue->q.stats.bytes   += nb_bytes;
+	rx_queue->q.stats.errors  += nb_dropped;
+	rx_queue->q.stats.nomem   += nb_nomem;
+
+	PMD_DEBUG_RX("%s:%d: RX: %d/%d pkts/bytes, %d/%d drops/nomem\n",
+		     mpipe_name(rx_queue->q.priv), rx_queue->q.queue_idx,
+		     nb_packets, nb_bytes, nb_dropped, nb_nomem);
+
+	return nb_packets;
+}
+
+static uint16_t
+mpipe_recv_pkts(void *_rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
+{
+	struct mpipe_rx_queue *rx_queue = _rxq;
+	uint16_t result = 0;
+
+	if (rx_queue) {
+		mpipe_dp_enter(rx_queue->q.priv);
+		if (likely(rx_queue->q.link_status))
+			result = mpipe_do_recv(rx_queue, rx_pkts, nb_pkts);
+		mpipe_dp_exit(rx_queue->q.priv);
+	}
+
+	return result;
+}
+
+static uint16_t
+mpipe_xmit_pkts(void *_txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
+{
+	struct mpipe_tx_queue *tx_queue = _txq;
+	uint16_t result = 0;
+
+	if (tx_queue) {
+		mpipe_dp_enter(tx_queue->q.priv);
+		if (likely(tx_queue->q.link_status))
+			result = mpipe_do_xmit(tx_queue, tx_pkts, nb_pkts);
+		mpipe_dp_exit(tx_queue->q.priv);
+	}
+
+	return result;
+}
+
+static int
+mpipe_link_mac(const char *ifname, uint8_t *mac)
+{
+	int rc, idx;
+	char name[GXIO_MPIPE_LINK_NAME_LEN];
+
+	for (idx = 0, rc = 0; !rc; idx++) {
+		rc = gxio_mpipe_link_enumerate_mac(idx, name, mac);
+		if (!rc && !strncmp(name, ifname, GXIO_MPIPE_LINK_NAME_LEN))
+			return 0;
+	}
+	return -ENODEV;
+}
+
+static int
+rte_pmd_mpipe_devinit(const char *ifname,
+		      const char *params __rte_unused)
+{
+	gxio_mpipe_context_t *context;
+	struct rte_eth_dev *eth_dev;
+	struct mpipe_dev_priv *priv;
+	int instance, rc;
+	uint8_t *mac;
+
+	/* Get the mPIPE instance that the device belongs to. */
+	instance = gxio_mpipe_link_instance(ifname);
+	context = mpipe_context(instance);
+	if (!context) {
+		RTE_LOG(ERR, PMD, "%s: No device for link.\n", ifname);
+		return -ENODEV;
+	}
+
+	priv = rte_zmalloc(NULL, sizeof(*priv), 0);
+	if (!priv) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate priv.\n", ifname);
+		return -ENOMEM;
+	}
+
+	memset(&priv->tx_stat_mapping, 0xff, sizeof(priv->tx_stat_mapping));
+	memset(&priv->rx_stat_mapping, 0xff, sizeof(priv->rx_stat_mapping));
+	priv->context = context;
+	priv->instance = instance;
+	priv->is_xaui = (strncmp(ifname, "xgbe", 4) == 0);
+	priv->channel = -1;
+
+	mac = priv->mac_addr.addr_bytes;
+	rc = mpipe_link_mac(ifname, mac);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to enumerate link.\n", ifname);
+		rte_free(priv);
+		return -ENODEV;
+	}
+
+	eth_dev = rte_eth_dev_allocate(ifname, RTE_ETH_DEV_VIRTUAL);
+	if (!eth_dev) {
+		RTE_LOG(ERR, PMD, "%s: Failed to allocate device.\n", ifname);
+		rte_free(priv);
+		return -ENOMEM;
+	}
+
+	RTE_LOG(INFO, PMD, "%s: Initialized mpipe device"
+		"(mac %02x:%02x:%02x:%02x:%02x:%02x).\n",
+		ifname, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+
+	priv->eth_dev = eth_dev;
+	priv->port_id = eth_dev->data->port_id;
+	eth_dev->data->dev_private = priv;
+	eth_dev->data->mac_addrs = &priv->mac_addr;
+
+	eth_dev->data->dev_flags = 0;
+	eth_dev->data->kdrv = RTE_KDRV_NONE;
+	eth_dev->driver = NULL;
+	eth_dev->data->drv_name = drivername;
+	eth_dev->data->numa_node = instance;
+
+	eth_dev->dev_ops      = &mpipe_dev_ops;
+	eth_dev->rx_pkt_burst = &mpipe_recv_pkts;
+	eth_dev->tx_pkt_burst = &mpipe_xmit_pkts;
+
+	rc = mpipe_link_init(priv);
+	if (rc < 0) {
+		RTE_LOG(ERR, PMD, "%s: Failed to init link.\n",
+			mpipe_name(priv));
+		return rc;
+	}
+
+	return 0;
+}
+
+static struct rte_driver pmd_mpipe_xgbe_drv = {
+	.name = "xgbe",
+	.type = PMD_VDEV,
+	.init = rte_pmd_mpipe_devinit,
+};
+
+static struct rte_driver pmd_mpipe_gbe_drv = {
+	.name = "gbe",
+	.type = PMD_VDEV,
+	.init = rte_pmd_mpipe_devinit,
+};
+
+PMD_REGISTER_DRIVER(pmd_mpipe_xgbe_drv);
+PMD_REGISTER_DRIVER(pmd_mpipe_gbe_drv);
+
+static void __attribute__((constructor, used))
+mpipe_init_contexts(void)
+{
+	struct mpipe_context *context;
+	int rc, instance;
+
+	for (instance = 0; instance < GXIO_MPIPE_INSTANCE_MAX; instance++) {
+		context = &mpipe_contexts[instance];
+
+		rte_spinlock_init(&context->lock);
+		rc = gxio_mpipe_init(&context->context, instance);
+		if (rc < 0)
+			break;
+	}
+
+	mpipe_instances = instance;
+}