driver/ldpaa_eth: Add LDPAA Ethernet driver

LDPAA Ethernet driver is a freescale's new ethernet driver based on
Layerscape architecture.

Every ethernet driver controls on DPNI object. Where all DPNIs share
one common DPBP and DPIO object to support  Rx and Tx flows.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
CC: Cristian Sovaiala <cristian.sovaiala@freescale.com>
CC: Bogdan Hamciuc <bogdan.hamciuc@freescale.com>
CC: J. German Rivera <German.Rivera@freescale.com>
[York Sun: s/NetReceive/net_process_received_packet]
Reviewed-by: York Sun <yorksun@freescale.com>

5 files changed, 871 insertions, 3 deletions

diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index f24443d..00a930c 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -69,4 +69,5 @@ obj-$(CONFIG_XILINX_LL_TEMAC) += xilinx_ll_temac.o xilinx_ll_temac_mdio.o \
 		xilinx_ll_temac_fifo.o xilinx_ll_temac_sdma.o
 obj-$(CONFIG_ZYNQ_GEM) += zynq_gem.o
 obj-$(CONFIG_FSL_MC_ENET) += fsl-mc/
+obj-$(CONFIG_FSL_MC_ENET) += ldpaa_eth/
 obj-$(CONFIG_VSC9953) += vsc9953.o
diff --git a/drivers/net/fsl-mc/mc.c b/drivers/net/fsl-mc/mc.c
index e29ee3d..2a2b0af 100644
--- a/drivers/net/fsl-mc/mc.c
+++ b/drivers/net/fsl-mc/mc.c
@@ -397,9 +397,10 @@ int dpbp_init(struct dprc_obj_desc obj_desc)
 	return 0;
 }
 
-int dprc_init_container_obj(struct dprc_obj_desc obj_desc)
+int dprc_init_container_obj(struct dprc_obj_desc obj_desc, uint16_t dprc_handle)
 {
-	int error = 0;
+	int error = 0, state = 0;
+	struct dprc_endpoint dpni_endpoint, dpmac_endpoint;
 	if (!strcmp(obj_desc.type, "dpbp")) {
 		if (!dflt_dpbp) {
 			error = dpbp_init(obj_desc);
@@ -412,6 +413,15 @@ int dprc_init_container_obj(struct dprc_obj_desc obj_desc)
 			if (error < 0)
 				printf("dpio_init failed\n");
 		}
+	} else if (!strcmp(obj_desc.type, "dpni")) {
+		strcpy(dpni_endpoint.type, obj_desc.type);
+		dpni_endpoint.id = obj_desc.id;
+		error = dprc_get_connection(dflt_mc_io, dprc_handle,
+				     &dpni_endpoint, &dpmac_endpoint, &state);
+		if (!strcmp(dpmac_endpoint.type, "dpmac"))
+			error = ldpaa_eth_init(obj_desc);
+		if (error < 0)
+			printf("ldpaa_eth_init failed\n");
 	}
 
 	return error;
@@ -436,7 +446,7 @@ int dprc_scan_container_obj(uint16_t dprc_handle, char *obj_type, int i)
 		debug("Discovered object: type %s, id %d, req %s\n",
 		      obj_desc.type, obj_desc.id, obj_type);
 
-		error = dprc_init_container_obj(obj_desc);
+		error = dprc_init_container_obj(obj_desc, dprc_handle);
 		if (error < 0) {
 			printf("dprc_init_container_obj(i=%d) failed: %d\n",
 			       i, error);
diff --git a/drivers/net/ldpaa_eth/Makefile b/drivers/net/ldpaa_eth/Makefile
new file mode 100644
index 0000000..3b1a60b
--- /dev/null
+++ b/drivers/net/ldpaa_eth/Makefile
@@ -0,0 +1,8 @@
+#
+# Copyright 2014 Freescale Semiconductor, Inc.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+# Layerscape LDPAA driver
+obj-y += ldpaa_eth.o
diff --git a/drivers/net/ldpaa_eth/ldpaa_eth.c b/drivers/net/ldpaa_eth/ldpaa_eth.c
new file mode 100644
index 0000000..3bb9e5e
--- /dev/null
+++ b/drivers/net/ldpaa_eth/ldpaa_eth.c
@@ -0,0 +1,696 @@
+/*
+ * Copyright (C) 2014 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/types.h>
+#include <malloc.h>
+#include <net.h>
+#include <hwconfig.h>
+#include <phy.h>
+#include <linux/compat.h>
+
+#include "ldpaa_eth.h"
+
+static int init_phy(struct eth_device *dev)
+{
+	/*TODO for external PHY */
+
+	return 0;
+}
+
+static void ldpaa_eth_rx(struct ldpaa_eth_priv *priv,
+			 const struct dpaa_fd *fd)
+{
+	u64 fd_addr;
+	uint16_t fd_offset;
+	uint32_t fd_length;
+	struct ldpaa_fas *fas;
+	uint32_t status, err;
+	struct qbman_release_desc releasedesc;
+	struct qbman_swp *swp = dflt_dpio->sw_portal;
+
+	invalidate_dcache_all();
+
+	fd_addr = ldpaa_fd_get_addr(fd);
+	fd_offset = ldpaa_fd_get_offset(fd);
+	fd_length = ldpaa_fd_get_len(fd);
+
+	debug("Rx frame:data addr=0x%p size=0x%x\n", (u64 *)fd_addr, fd_length);
+
+	if (fd->simple.frc & LDPAA_FD_FRC_FASV) {
+		/* Read the frame annotation status word and check for errors */
+		fas = (struct ldpaa_fas *)
+				((uint8_t *)(fd_addr) +
+				priv->buf_layout.private_data_size);
+		status = le32_to_cpu(fas->status);
+		if (status & LDPAA_ETH_RX_ERR_MASK) {
+			printf("Rx frame error(s): 0x%08x\n",
+			       status & LDPAA_ETH_RX_ERR_MASK);
+			goto error;
+		} else if (status & LDPAA_ETH_RX_UNSUPP_MASK) {
+			printf("Unsupported feature in bitmask: 0x%08x\n",
+			       status & LDPAA_ETH_RX_UNSUPP_MASK);
+			goto error;
+		}
+	}
+
+	debug("Rx frame: To Upper layer\n");
+	net_process_received_packet((uint8_t *)(fd_addr) + fd_offset,
+				    fd_length);
+
+error:
+	qbman_release_desc_clear(&releasedesc);
+	qbman_release_desc_set_bpid(&releasedesc, dflt_dpbp->dpbp_attr.bpid);
+	do {
+		/* Release buffer into the QBMAN */
+		err = qbman_swp_release(swp, &releasedesc, &fd_addr, 1);
+	} while (err == -EBUSY);
+	return;
+}
+
+static int ldpaa_eth_pull_dequeue_rx(struct eth_device *dev)
+{
+	struct ldpaa_eth_priv *priv = (struct ldpaa_eth_priv *)dev->priv;
+	const struct ldpaa_dq *dq;
+	const struct dpaa_fd *fd;
+	int i = 5, err = 0, status;
+	static struct qbman_pull_desc pulldesc;
+	struct qbman_swp *swp = dflt_dpio->sw_portal;
+
+	qbman_pull_desc_clear(&pulldesc);
+	qbman_pull_desc_set_numframes(&pulldesc, 1);
+	qbman_pull_desc_set_fq(&pulldesc, priv->rx_dflt_fqid);
+
+	while (--i) {
+		err = qbman_swp_pull(swp, &pulldesc);
+		if (err < 0) {
+			printf("Dequeue frames error:0x%08x\n", err);
+			continue;
+		}
+
+		dq = qbman_swp_dqrr_next(swp);
+		if (dq) {
+			/* Check for valid frame. If not sent a consume
+			 * confirmation to QBMAN otherwise give it to NADK
+			 * application and then send consume confirmation to
+			 * QBMAN.
+			 */
+			status = (uint8_t)ldpaa_dq_flags(dq);
+			if ((status & LDPAA_DQ_STAT_VALIDFRAME) == 0) {
+				debug("Dequeue RX frames:");
+				debug("No frame delivered\n");
+
+				qbman_swp_dqrr_consume(swp, dq);
+				break;
+			}
+
+			fd = ldpaa_dq_fd(dq);
+
+			/* Obtain FD and process it */
+			ldpaa_eth_rx(priv, fd);
+			qbman_swp_dqrr_consume(swp, dq);
+			break;
+		}
+	}
+
+	return err;
+}
+
+static void ldpaa_eth_tx_conf(struct ldpaa_eth_priv *priv,
+			      const struct dpaa_fd *fd)
+{
+	uint64_t fd_addr;
+	struct ldpaa_fas *fas;
+	uint32_t status, err;
+	struct qbman_release_desc releasedesc;
+	struct qbman_swp *swp = dflt_dpio->sw_portal;
+
+	invalidate_dcache_all();
+	fd_addr = ldpaa_fd_get_addr(fd);
+
+
+	debug("TX Conf frame:data addr=0x%p\n", (u64 *)fd_addr);
+
+	/* Check the status from the Frame Annotation */
+	if (fd->simple.frc & LDPAA_FD_FRC_FASV) {
+		fas = (struct ldpaa_fas *)
+				((uint8_t *)(fd_addr) +
+				priv->buf_layout.private_data_size);
+		status = le32_to_cpu(fas->status);
+		if (status & LDPAA_ETH_TXCONF_ERR_MASK) {
+			printf("TxConf frame error(s): 0x%08x\n",
+			       status & LDPAA_ETH_TXCONF_ERR_MASK);
+		}
+	}
+
+	qbman_release_desc_clear(&releasedesc);
+	qbman_release_desc_set_bpid(&releasedesc, dflt_dpbp->dpbp_attr.bpid);
+	do {
+		/* Release buffer into the QBMAN */
+		err = qbman_swp_release(swp, &releasedesc, &fd_addr, 1);
+	} while (err == -EBUSY);
+}
+
+static int ldpaa_eth_pull_dequeue_tx_conf(struct ldpaa_eth_priv *priv)
+{
+	const struct ldpaa_dq *dq;
+	const struct dpaa_fd *fd;
+	int err = 0;
+	int i = 5, status;
+	static struct qbman_pull_desc pulldesc;
+	struct qbman_swp *swp = dflt_dpio->sw_portal;
+
+	qbman_pull_desc_clear(&pulldesc);
+	qbman_pull_desc_set_numframes(&pulldesc, 1);
+	qbman_pull_desc_set_fq(&pulldesc, priv->tx_conf_fqid);
+
+	while (--i) {
+		err =  qbman_swp_pull(swp, &pulldesc);
+		if (err < 0) {
+			printf("Dequeue TX conf frames error:0x%08x\n", err);
+			continue;
+		}
+
+		dq = qbman_swp_dqrr_next(swp);
+		if (dq) {
+			/* Check for valid frame. If not sent a consume
+			 * confirmation to QBMAN otherwise give it to NADK
+			 * application and then send consume confirmation to
+			 * QBMAN.
+			 */
+			status = (uint8_t)ldpaa_dq_flags(dq);
+			if ((status & LDPAA_DQ_STAT_VALIDFRAME) == 0) {
+				debug("Dequeue TX conf frames:");
+				debug("No frame is delivered\n");
+
+				qbman_swp_dqrr_consume(swp, dq);
+				break;
+			}
+			fd = ldpaa_dq_fd(dq);
+
+			ldpaa_eth_tx_conf(priv, fd);
+			qbman_swp_dqrr_consume(swp, dq);
+			break;
+		}
+	}
+
+	return err;
+}
+
+static int ldpaa_eth_tx(struct eth_device *net_dev, void *buf, int len)
+{
+	struct ldpaa_eth_priv *priv = (struct ldpaa_eth_priv *)net_dev->priv;
+	struct dpaa_fd fd;
+	u64 buffer_start;
+	int data_offset, err;
+	struct qbman_swp *swp = dflt_dpio->sw_portal;
+	struct qbman_eq_desc ed;
+
+	/* Setup the FD fields */
+	memset(&fd, 0, sizeof(fd));
+
+	data_offset = priv->tx_data_offset;
+
+	do {
+		err = qbman_swp_acquire(dflt_dpio->sw_portal,
+					dflt_dpbp->dpbp_attr.bpid,
+					&buffer_start, 1);
+	} while (err == -EBUSY);
+
+	if (err < 0) {
+		printf("qbman_swp_acquire() failed\n");
+		return -ENOMEM;
+	}
+
+	debug("TX data: malloc buffer start=0x%p\n", (u64 *)buffer_start);
+
+	memcpy(((uint8_t *)(buffer_start) + data_offset), buf, len);
+
+	flush_dcache_range(buffer_start, LDPAA_ETH_RX_BUFFER_SIZE);
+
+	ldpaa_fd_set_addr(&fd, (u64)buffer_start);
+	ldpaa_fd_set_offset(&fd, (uint16_t)(data_offset));
+	ldpaa_fd_set_bpid(&fd, dflt_dpbp->dpbp_attr.bpid);
+	ldpaa_fd_set_len(&fd, len);
+
+	fd.simple.ctrl = LDPAA_FD_CTRL_ASAL | LDPAA_FD_CTRL_PTA |
+				LDPAA_FD_CTRL_PTV1;
+
+	qbman_eq_desc_clear(&ed);
+	qbman_eq_desc_set_no_orp(&ed, 0);
+	qbman_eq_desc_set_qd(&ed, priv->tx_qdid, priv->tx_flow_id, 0);
+	err = qbman_swp_enqueue(swp, &ed, (const struct qbman_fd *)(&fd));
+	if (err < 0)
+		printf("error enqueueing Tx frame\n");
+
+	mdelay(1);
+
+	err = ldpaa_eth_pull_dequeue_tx_conf(priv);
+	if (err < 0)
+		printf("error Tx Conf frame\n");
+
+	return err;
+}
+
+static int ldpaa_eth_open(struct eth_device *net_dev, bd_t *bd)
+{
+	struct ldpaa_eth_priv *priv = (struct ldpaa_eth_priv *)net_dev->priv;
+	struct dpni_queue_attr rx_queue_attr;
+	struct dpni_tx_flow_attr tx_flow_attr;
+	uint8_t mac_addr[6];
+	int err;
+
+	if (net_dev->state == ETH_STATE_ACTIVE)
+		return 0;
+
+	/* DPNI initialization */
+	err = ldpaa_dpni_setup(priv);
+	if (err < 0)
+		goto err_dpni_setup;
+
+	err = ldpaa_dpbp_setup();
+	if (err < 0)
+		goto err_dpbp_setup;
+
+	/* DPNI binding DPBP */
+	err = ldpaa_dpni_bind(priv);
+	if (err)
+		goto err_bind;
+
+	err = dpni_get_primary_mac_addr(dflt_mc_io, priv->dpni_handle,
+					mac_addr);
+	if (err) {
+		printf("dpni_get_primary_mac_addr() failed\n");
+		return err;
+	}
+
+	memcpy(net_dev->enetaddr, mac_addr, 0x6);
+
+	/* setup the MAC address */
+	if (net_dev->enetaddr[0] & 0x01) {
+		printf("%s: MacAddress is multcast address\n",	__func__);
+		return 1;
+	}
+
+#ifdef CONFIG_PHYLIB
+	/* TODO Check this path */
+	ret = phy_startup(priv->phydev);
+	if (ret) {
+		printf("%s: Could not initialize\n", priv->phydev->dev->name);
+		return ret;
+	}
+#else
+	priv->phydev->speed = SPEED_1000;
+	priv->phydev->link = 1;
+	priv->phydev->duplex = DUPLEX_FULL;
+#endif
+
+	err = dpni_enable(dflt_mc_io, priv->dpni_handle);
+	if (err < 0) {
+		printf("dpni_enable() failed\n");
+		return err;
+	}
+
+	/* TODO: support multiple Rx flows */
+	err = dpni_get_rx_flow(dflt_mc_io, priv->dpni_handle, 0, 0,
+			       &rx_queue_attr);
+	if (err) {
+		printf("dpni_get_rx_flow() failed\n");
+		goto err_rx_flow;
+	}
+
+	priv->rx_dflt_fqid = rx_queue_attr.fqid;
+
+	err = dpni_get_qdid(dflt_mc_io, priv->dpni_handle, &priv->tx_qdid);
+	if (err) {
+		printf("dpni_get_qdid() failed\n");
+		goto err_qdid;
+	}
+
+	err = dpni_get_tx_flow(dflt_mc_io, priv->dpni_handle, priv->tx_flow_id,
+			       &tx_flow_attr);
+	if (err) {
+		printf("dpni_get_tx_flow() failed\n");
+		goto err_tx_flow;
+	}
+
+	priv->tx_conf_fqid = tx_flow_attr.conf_err_attr.queue_attr.fqid;
+
+	if (!priv->phydev->link)
+		printf("%s: No link.\n", priv->phydev->dev->name);
+
+	return priv->phydev->link ? 0 : -1;
+
+err_tx_flow:
+err_qdid:
+err_rx_flow:
+	dpni_disable(dflt_mc_io, priv->dpni_handle);
+err_bind:
+	ldpaa_dpbp_free();
+err_dpbp_setup:
+	dpni_close(dflt_mc_io, priv->dpni_handle);
+err_dpni_setup:
+	return err;
+}
+
+static void ldpaa_eth_stop(struct eth_device *net_dev)
+{
+	struct ldpaa_eth_priv *priv = (struct ldpaa_eth_priv *)net_dev->priv;
+	int err = 0;
+
+	if (net_dev->state == ETH_STATE_PASSIVE)
+		return;
+	/* Stop Tx and Rx traffic */
+	err = dpni_disable(dflt_mc_io, priv->dpni_handle);
+	if (err < 0)
+		printf("dpni_disable() failed\n");
+
+#ifdef CONFIG_PHYLIB
+	phy_shutdown(priv->phydev);
+#endif
+
+	ldpaa_dpbp_free();
+	dpni_reset(dflt_mc_io, priv->dpni_handle);
+	dpni_close(dflt_mc_io, priv->dpni_handle);
+}
+
+static void ldpaa_dpbp_drain_cnt(int count)
+{
+	uint64_t buf_array[7];
+	void *addr;
+	int ret, i;
+
+	BUG_ON(count > 7);
+
+	do {
+		ret = qbman_swp_acquire(dflt_dpio->sw_portal,
+					dflt_dpbp->dpbp_attr.bpid,
+					buf_array, count);
+		if (ret < 0) {
+			printf("qbman_swp_acquire() failed\n");
+			return;
+		}
+		for (i = 0; i < ret; i++) {
+			addr = (void *)buf_array[i];
+			debug("Free: buffer addr =0x%p\n", addr);
+			free(addr);
+		}
+	} while (ret);
+}
+
+static void ldpaa_dpbp_drain(void)
+{
+	int i;
+	for (i = 0; i < LDPAA_ETH_NUM_BUFS; i += 7)
+		ldpaa_dpbp_drain_cnt(7);
+}
+
+static int ldpaa_bp_add_7(uint16_t bpid)
+{
+	uint64_t buf_array[7];
+	u8 *addr;
+	int i;
+	struct qbman_release_desc rd;
+
+	for (i = 0; i < 7; i++) {
+		addr = memalign(L1_CACHE_BYTES, LDPAA_ETH_RX_BUFFER_SIZE);
+		if (!addr) {
+			printf("addr allocation failed\n");
+			goto err_alloc;
+		}
+		memset(addr, 0x00, LDPAA_ETH_RX_BUFFER_SIZE);
+
+		buf_array[i] = (uint64_t)addr;
+		debug("Release: buffer addr =0x%p\n", addr);
+	}
+
+release_bufs:
+	/* In case the portal is busy, retry until successful.
+	 * This function is guaranteed to succeed in a reasonable amount
+	 * of time.
+	 */
+
+	do {
+		mdelay(1);
+		qbman_release_desc_clear(&rd);
+		qbman_release_desc_set_bpid(&rd, bpid);
+	} while (qbman_swp_release(dflt_dpio->sw_portal, &rd, buf_array, i));
+
+	return i;
+
+err_alloc:
+	if (i)
+		goto release_bufs;
+
+	return 0;
+}
+
+static int ldpaa_dpbp_seed(uint16_t bpid)
+{
+	int i;
+	int count;
+
+	for (i = 0; i < LDPAA_ETH_NUM_BUFS; i += 7) {
+		count = ldpaa_bp_add_7(bpid);
+		if (count < 7)
+			printf("Buffer Seed= %d\n", count);
+	}
+
+	return 0;
+}
+
+static int ldpaa_dpbp_setup(void)
+{
+	int err;
+
+	err = dpbp_open(dflt_mc_io, dflt_dpbp->dpbp_attr.id,
+			&dflt_dpbp->dpbp_handle);
+	if (err) {
+		printf("dpbp_open() failed\n");
+		goto err_open;
+	}
+
+	err = dpbp_enable(dflt_mc_io, dflt_dpbp->dpbp_handle);
+	if (err) {
+		printf("dpbp_enable() failed\n");
+		goto err_enable;
+	}
+
+	err = dpbp_get_attributes(dflt_mc_io, dflt_dpbp->dpbp_handle,
+				  &dflt_dpbp->dpbp_attr);
+	if (err) {
+		printf("dpbp_get_attributes() failed\n");
+		goto err_get_attr;
+	}
+
+	err = ldpaa_dpbp_seed(dflt_dpbp->dpbp_attr.bpid);
+	if (err) {
+		printf("Buffer seeding failed for DPBP %d (bpid=%d)\n",
+		       dflt_dpbp->dpbp_attr.id, dflt_dpbp->dpbp_attr.bpid);
+		goto err_seed;
+	}
+
+	return 0;
+
+err_seed:
+err_get_attr:
+	dpbp_disable(dflt_mc_io, dflt_dpbp->dpbp_handle);
+err_enable:
+	dpbp_close(dflt_mc_io, dflt_dpbp->dpbp_handle);
+err_open:
+	return err;
+}
+
+static void ldpaa_dpbp_free(void)
+{
+	ldpaa_dpbp_drain();
+	dpbp_disable(dflt_mc_io, dflt_dpbp->dpbp_handle);
+	dpbp_reset(dflt_mc_io, dflt_dpbp->dpbp_handle);
+	dpbp_close(dflt_mc_io, dflt_dpbp->dpbp_handle);
+}
+
+static int ldpaa_dpni_setup(struct ldpaa_eth_priv *priv)
+{
+	int err;
+
+	/* and get a handle for the DPNI this interface is associate with */
+	err = dpni_open(dflt_mc_io, priv->dpni_id, &priv->dpni_handle);
+	if (err) {
+		printf("dpni_open() failed\n");
+		goto err_open;
+	}
+
+	err = dpni_get_attributes(dflt_mc_io, priv->dpni_handle,
+				  &priv->dpni_attrs);
+	if (err) {
+		printf("dpni_get_attributes() failed (err=%d)\n", err);
+		goto err_get_attr;
+	}
+
+	/* Configure our buffers' layout */
+	priv->buf_layout.options = DPNI_BUF_LAYOUT_OPT_PARSER_RESULT |
+				   DPNI_BUF_LAYOUT_OPT_FRAME_STATUS |
+				   DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE;
+	priv->buf_layout.pass_parser_result = true;
+	priv->buf_layout.pass_frame_status = true;
+	priv->buf_layout.private_data_size = LDPAA_ETH_SWA_SIZE;
+	/* ...rx, ... */
+	err = dpni_set_rx_buffer_layout(dflt_mc_io, priv->dpni_handle,
+					&priv->buf_layout);
+	if (err) {
+		printf("dpni_set_rx_buffer_layout() failed");
+		goto err_buf_layout;
+	}
+
+	/* ... tx, ... */
+	priv->buf_layout.options &= ~DPNI_BUF_LAYOUT_OPT_PARSER_RESULT;
+	err = dpni_set_tx_buffer_layout(dflt_mc_io, priv->dpni_handle,
+					&priv->buf_layout);
+	if (err) {
+		printf("dpni_set_tx_buffer_layout() failed");
+		goto err_buf_layout;
+	}
+
+	/* ... tx-confirm. */
+	priv->buf_layout.options &= ~DPNI_BUF_LAYOUT_OPT_PRIVATE_DATA_SIZE;
+	err = dpni_set_tx_conf_buffer_layout(dflt_mc_io, priv->dpni_handle,
+					     &priv->buf_layout);
+	if (err) {
+		printf("dpni_set_tx_conf_buffer_layout() failed");
+		goto err_buf_layout;
+	}
+
+	/* Now that we've set our tx buffer layout, retrieve the minimum
+	 * required tx data offset.
+	 */
+	err = dpni_get_tx_data_offset(dflt_mc_io, priv->dpni_handle,
+				      &priv->tx_data_offset);
+	if (err) {
+		printf("dpni_get_tx_data_offset() failed\n");
+		goto err_data_offset;
+	}
+
+	/* Warn in case TX data offset is not multiple of 64 bytes. */
+	WARN_ON(priv->tx_data_offset % 64);
+
+	/* Accomodate SWA space. */
+	priv->tx_data_offset += LDPAA_ETH_SWA_SIZE;
+	debug("priv->tx_data_offset=%d\n", priv->tx_data_offset);
+
+	return 0;
+
+err_data_offset:
+err_buf_layout:
+err_get_attr:
+	dpni_close(dflt_mc_io, priv->dpni_handle);
+err_open:
+	return err;
+}
+
+static int ldpaa_dpni_bind(struct ldpaa_eth_priv *priv)
+{
+	struct dpni_pools_cfg pools_params;
+	struct dpni_tx_flow_cfg dflt_tx_flow;
+	int err = 0;
+
+	pools_params.num_dpbp = 1;
+	pools_params.pools[0].dpbp_id = (uint16_t)dflt_dpbp->dpbp_attr.id;
+	pools_params.pools[0].buffer_size = LDPAA_ETH_RX_BUFFER_SIZE;
+	err = dpni_set_pools(dflt_mc_io, priv->dpni_handle, &pools_params);
+	if (err) {
+		printf("dpni_set_pools() failed\n");
+		return err;
+	}
+
+	priv->tx_flow_id = DPNI_NEW_FLOW_ID;
+	memset(&dflt_tx_flow, 0, sizeof(dflt_tx_flow));
+
+	err = dpni_set_tx_flow(dflt_mc_io, priv->dpni_handle,
+			       &priv->tx_flow_id, &dflt_tx_flow);
+	if (err) {
+		printf("dpni_set_tx_flow() failed\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int ldpaa_eth_netdev_init(struct eth_device *net_dev)
+{
+	int err;
+	struct ldpaa_eth_priv *priv = (struct ldpaa_eth_priv *)net_dev->priv;
+
+	if (priv->type == LDPAA_ETH_1G_E)
+		sprintf(net_dev->name, "DTSEC%d", priv->dpni_id);
+	else
+		sprintf(net_dev->name, "TGEC%d", priv->dpni_id);
+
+	net_dev->iobase = 0;
+	net_dev->init = ldpaa_eth_open;
+	net_dev->halt = ldpaa_eth_stop;
+	net_dev->send = ldpaa_eth_tx;
+	net_dev->recv = ldpaa_eth_pull_dequeue_rx;
+/*
+	TODO: PHY MDIO information
+	priv->bus = info->bus;
+	priv->phyaddr = info->phy_addr;
+	priv->enet_if = info->enet_if;
+*/
+
+	if (init_phy(net_dev))
+		return 0;
+
+	err = eth_register(net_dev);
+	if (err < 0) {
+		printf("eth_register() = %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+int ldpaa_eth_init(struct dprc_obj_desc obj_desc)
+{
+	struct eth_device		*net_dev = NULL;
+	struct ldpaa_eth_priv		*priv = NULL;
+	int				err = 0;
+
+
+	/* Net device */
+	net_dev = (struct eth_device *)malloc(sizeof(struct eth_device));
+	if (!net_dev) {
+		printf("eth_device malloc() failed\n");
+		return -ENOMEM;
+	}
+	memset(net_dev, 0, sizeof(struct eth_device));
+
+	/* alloc the ldpaa ethernet private struct */
+	priv = (struct ldpaa_eth_priv *)malloc(sizeof(struct ldpaa_eth_priv));
+	if (!priv) {
+		printf("ldpaa_eth_priv malloc() failed\n");
+		return -ENOMEM;
+	}
+	memset(priv, 0, sizeof(struct ldpaa_eth_priv));
+
+	net_dev->priv = (void *)priv;
+	priv->net_dev = (struct eth_device *)net_dev;
+	priv->dpni_id = obj_desc.id;
+
+	err = ldpaa_eth_netdev_init(net_dev);
+	if (err)
+		goto err_netdev_init;
+
+	debug("ldpaa ethernet: Probed interface %s\n", net_dev->name);
+	return 0;
+
+err_netdev_init:
+	free(priv);
+	net_dev->priv = NULL;
+	free(net_dev);
+
+	return err;
+}
diff --git a/drivers/net/ldpaa_eth/ldpaa_eth.h b/drivers/net/ldpaa_eth/ldpaa_eth.h
new file mode 100644
index 0000000..c7760ef
--- /dev/null
+++ b/drivers/net/ldpaa_eth/ldpaa_eth.h
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2014 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __LDPAA_ETH_H
+#define __LDPAA_ETH_H
+
+#include <linux/netdevice.h>
+#include <fsl-mc/fsl_mc.h>
+#include <fsl-mc/fsl_dpaa_fd.h>
+#include <fsl-mc/fsl_dprc.h>
+#include <fsl-mc/fsl_dpni.h>
+#include <fsl-mc/fsl_dpbp.h>
+#include <fsl-mc/fsl_dpio.h>
+#include <fsl-mc/fsl_qbman_portal.h>
+#include <fsl-mc/fsl_mc_private.h>
+
+
+enum ldpaa_eth_type {
+	LDPAA_ETH_1G_E,
+	LDPAA_ETH_10G_E,
+};
+
+/* Arbitrary values for now, but we'll need to tune */
+#define LDPAA_ETH_NUM_BUFS		(2 * 7)
+#define LDPAA_ETH_REFILL_THRESH		(LDPAA_ETH_NUM_BUFS/2)
+#define LDPAA_ETH_RX_BUFFER_SIZE	2048
+
+/* Hardware requires alignment for ingress/egress buffer addresses
+ * and ingress buffer lengths.
+ */
+#define LDPAA_ETH_BUF_ALIGN		64
+
+/* So far we're only accomodating a skb backpointer in the frame's
+ * software annotation, but the hardware options are either 0 or 64.
+ */
+#define LDPAA_ETH_SWA_SIZE		64
+
+/* Annotation valid bits in FD FRC */
+#define LDPAA_FD_FRC_FASV		0x8000
+#define LDPAA_FD_FRC_FAEADV		0x4000
+#define LDPAA_FD_FRC_FAPRV		0x2000
+#define LDPAA_FD_FRC_FAIADV		0x1000
+#define LDPAA_FD_FRC_FASWOV		0x0800
+#define LDPAA_FD_FRC_FAICFDV		0x0400
+
+/* Annotation bits in FD CTRL */
+#define LDPAA_FD_CTRL_ASAL		0x00020000	/* ASAL = 128 */
+#define LDPAA_FD_CTRL_PTA		0x00800000
+#define LDPAA_FD_CTRL_PTV1		0x00400000
+
+/* TODO: we may want to move this and other WRIOP related defines
+ * to a separate header
+ */
+/* Frame annotation status */
+struct ldpaa_fas {
+	u8 reserved;
+	u8 ppid;
+	__le16 ifpid;
+	__le32 status;
+} __packed;
+
+/* Debug frame, otherwise supposed to be discarded */
+#define LDPAA_ETH_FAS_DISC		0x80000000
+/* MACSEC frame */
+#define LDPAA_ETH_FAS_MS		0x40000000
+#define LDPAA_ETH_FAS_PTP		0x08000000
+/* Ethernet multicast frame */
+#define LDPAA_ETH_FAS_MC		0x04000000
+/* Ethernet broadcast frame */
+#define LDPAA_ETH_FAS_BC		0x02000000
+#define LDPAA_ETH_FAS_KSE		0x00040000
+#define LDPAA_ETH_FAS_EOFHE		0x00020000
+#define LDPAA_ETH_FAS_MNLE		0x00010000
+#define LDPAA_ETH_FAS_TIDE		0x00008000
+#define LDPAA_ETH_FAS_PIEE		0x00004000
+/* Frame length error */
+#define LDPAA_ETH_FAS_FLE		0x00002000
+/* Frame physical error; our favourite pastime */
+#define LDPAA_ETH_FAS_FPE		0x00001000
+#define LDPAA_ETH_FAS_PTE		0x00000080
+#define LDPAA_ETH_FAS_ISP		0x00000040
+#define LDPAA_ETH_FAS_PHE		0x00000020
+#define LDPAA_ETH_FAS_BLE		0x00000010
+/* L3 csum validation performed */
+#define LDPAA_ETH_FAS_L3CV		0x00000008
+/* L3 csum error */
+#define LDPAA_ETH_FAS_L3CE		0x00000004
+/* L4 csum validation performed */
+#define LDPAA_ETH_FAS_L4CV		0x00000002
+/* L4 csum error */
+#define LDPAA_ETH_FAS_L4CE		0x00000001
+/* These bits always signal errors */
+#define LDPAA_ETH_RX_ERR_MASK		(LDPAA_ETH_FAS_DISC	| \
+					 LDPAA_ETH_FAS_KSE	| \
+					 LDPAA_ETH_FAS_EOFHE	| \
+					 LDPAA_ETH_FAS_MNLE	| \
+					 LDPAA_ETH_FAS_TIDE	| \
+					 LDPAA_ETH_FAS_PIEE	| \
+					 LDPAA_ETH_FAS_FLE	| \
+					 LDPAA_ETH_FAS_FPE	| \
+					 LDPAA_ETH_FAS_PTE	| \
+					 LDPAA_ETH_FAS_ISP	| \
+					 LDPAA_ETH_FAS_PHE	| \
+					 LDPAA_ETH_FAS_BLE	| \
+					 LDPAA_ETH_FAS_L3CE	| \
+					 LDPAA_ETH_FAS_L4CE)
+/* Unsupported features in the ingress */
+#define LDPAA_ETH_RX_UNSUPP_MASK	LDPAA_ETH_FAS_MS
+/* TODO trim down the bitmask; not all of them apply to Tx-confirm */
+#define LDPAA_ETH_TXCONF_ERR_MASK	(LDPAA_ETH_FAS_KSE	| \
+					 LDPAA_ETH_FAS_EOFHE	| \
+					 LDPAA_ETH_FAS_MNLE	| \
+					 LDPAA_ETH_FAS_TIDE)
+
+struct ldpaa_eth_priv {
+	struct eth_device *net_dev;
+	int dpni_id;
+	uint16_t dpni_handle;
+	struct dpni_attr dpni_attrs;
+	/* Insofar as the MC is concerned, we're using one layout on all 3 types
+	 * of buffers (Rx, Tx, Tx-Conf).
+	 */
+	struct dpni_buffer_layout buf_layout;
+	uint16_t tx_data_offset;
+
+	uint32_t rx_dflt_fqid;
+	uint16_t tx_qdid;
+	uint32_t tx_conf_fqid;
+	uint16_t tx_flow_id;
+
+	enum ldpaa_eth_type type;	/* 1G or 10G ethernet */
+	phy_interface_t enet_if;
+	struct mii_dev *bus;
+	struct phy_device *phydev;
+	int phyaddr;
+
+};
+
+extern struct fsl_mc_io *dflt_mc_io;
+extern struct fsl_dpbp_obj *dflt_dpbp;
+extern struct fsl_dpio_obj *dflt_dpio;
+
+static void ldpaa_dpbp_drain_cnt(int count);
+static void ldpaa_dpbp_drain(void);
+static int ldpaa_dpbp_seed(uint16_t bpid);
+static void ldpaa_dpbp_free(void);
+static int ldpaa_dpni_setup(struct ldpaa_eth_priv *priv);
+static int ldpaa_dpbp_setup(void);
+static int ldpaa_dpni_bind(struct ldpaa_eth_priv *priv);
+#endif	/* __LDPAA_H */