[PATCH net-next v5 03/10] net: ti: icssg-prueth: Move common functions into a separate file

[Diogo Ivo <diogo.ivo@siemens.com>]

In order to allow code sharing between Silicon Revisions 1.0 and 2.0
move all functions that can be shared into a common file. This commit
introduces no functional changes.

Signed-off-by: Diogo Ivo <diogo.ivo@siemens.com>
Reviewed-by: MD Danish Anwar <danishanwar@ti.com>
---
Changes in v5: 
 - Added Reviewed-by tag from Danish 

 drivers/net/ethernet/ti/Makefile             |    1 +
 drivers/net/ethernet/ti/icssg/icssg_common.c | 1198 ++++++++++++++++++
 drivers/net/ethernet/ti/icssg/icssg_prueth.c | 1183 -----------------
 drivers/net/ethernet/ti/icssg/icssg_prueth.h |   59 +
 4 files changed, 1258 insertions(+), 1183 deletions(-)
 create mode 100644 drivers/net/ethernet/ti/icssg/icssg_common.c

diff --git a/drivers/net/ethernet/ti/Makefile b/drivers/net/ethernet/ti/Makefile
index d8590304f3df..4876f20aa495 100644
--- a/drivers/net/ethernet/ti/Makefile
+++ b/drivers/net/ethernet/ti/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_TI_K3_AM65_CPTS) += am65-cpts.o
 
 obj-$(CONFIG_TI_ICSSG_PRUETH) += icssg-prueth.o
 icssg-prueth-y := icssg/icssg_prueth.o \
+		  icssg/icssg_common.o \
 		  icssg/icssg_classifier.o \
 		  icssg/icssg_queues.o \
 		  icssg/icssg_config.o \
diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/ethernet/ti/icssg/icssg_common.c
new file mode 100644
index 000000000000..99f27ecc9352
--- /dev/null
+++ b/drivers/net/ethernet/ti/icssg/icssg_common.c
@@ -0,0 +1,1198 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* Texas Instruments ICSSG Ethernet Driver
+ *
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Copyright (C) Siemens AG, 2024
+ *
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/dma/ti-cppi5.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_mdio.h>
+#include <linux/phy.h>
+#include <linux/remoteproc/pruss.h>
+#include <linux/regmap.h>
+#include <linux/remoteproc.h>
+
+#include "icssg_prueth.h"
+#include "../k3-cppi-desc-pool.h"
+
+/* Netif debug messages possible */
+#define PRUETH_EMAC_DEBUG       (NETIF_MSG_DRV | \
+				 NETIF_MSG_PROBE | \
+				 NETIF_MSG_LINK | \
+				 NETIF_MSG_TIMER | \
+				 NETIF_MSG_IFDOWN | \
+				 NETIF_MSG_IFUP | \
+				 NETIF_MSG_RX_ERR | \
+				 NETIF_MSG_TX_ERR | \
+				 NETIF_MSG_TX_QUEUED | \
+				 NETIF_MSG_INTR | \
+				 NETIF_MSG_TX_DONE | \
+				 NETIF_MSG_RX_STATUS | \
+				 NETIF_MSG_PKTDATA | \
+				 NETIF_MSG_HW | \
+				 NETIF_MSG_WOL)
+
+#define prueth_napi_to_emac(napi) container_of(napi, struct prueth_emac, napi_rx)
+
+void prueth_cleanup_rx_chns(struct prueth_emac *emac,
+			    struct prueth_rx_chn *rx_chn,
+			    int max_rflows)
+{
+	if (rx_chn->desc_pool)
+		k3_cppi_desc_pool_destroy(rx_chn->desc_pool);
+
+	if (rx_chn->rx_chn)
+		k3_udma_glue_release_rx_chn(rx_chn->rx_chn);
+}
+
+void prueth_cleanup_tx_chns(struct prueth_emac *emac)
+{
+	int i;
+
+	for (i = 0; i < emac->tx_ch_num; i++) {
+		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];
+
+		if (tx_chn->desc_pool)
+			k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
+
+		if (tx_chn->tx_chn)
+			k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
+
+		/* Assume prueth_cleanup_tx_chns() is called at the
+		 * end after all channel resources are freed
+		 */
+		memset(tx_chn, 0, sizeof(*tx_chn));
+	}
+}
+
+void prueth_ndev_del_tx_napi(struct prueth_emac *emac, int num)
+{
+	int i;
+
+	for (i = 0; i < num; i++) {
+		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];
+
+		if (tx_chn->irq)
+			free_irq(tx_chn->irq, tx_chn);
+		netif_napi_del(&tx_chn->napi_tx);
+	}
+}
+
+void prueth_xmit_free(struct prueth_tx_chn *tx_chn,
+		      struct cppi5_host_desc_t *desc)
+{
+	struct cppi5_host_desc_t *first_desc, *next_desc;
+	dma_addr_t buf_dma, next_desc_dma;
+	u32 buf_dma_len;
+
+	first_desc = desc;
+	next_desc = first_desc;
+
+	cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len);
+	k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
+
+	dma_unmap_single(tx_chn->dma_dev, buf_dma, buf_dma_len,
+			 DMA_TO_DEVICE);
+
+	next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc);
+	k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
+	while (next_desc_dma) {
+		next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
+						       next_desc_dma);
+		cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len);
+		k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
+
+		dma_unmap_page(tx_chn->dma_dev, buf_dma, buf_dma_len,
+			       DMA_TO_DEVICE);
+
+		next_desc_dma = cppi5_hdesc_get_next_hbdesc(next_desc);
+		k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
+
+		k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
+	}
+
+	k3_cppi_desc_pool_free(tx_chn->desc_pool, first_desc);
+}
+
+int emac_tx_complete_packets(struct prueth_emac *emac, int chn,
+			     int budget)
+{
+	struct net_device *ndev = emac->ndev;
+	struct cppi5_host_desc_t *desc_tx;
+	struct netdev_queue *netif_txq;
+	struct prueth_tx_chn *tx_chn;
+	unsigned int total_bytes = 0;
+	struct sk_buff *skb;
+	dma_addr_t desc_dma;
+	int res, num_tx = 0;
+	void **swdata;
+
+	tx_chn = &emac->tx_chns[chn];
+
+	while (true) {
+		res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
+		if (res == -ENODATA)
+			break;
+
+		/* teardown completion */
+		if (cppi5_desc_is_tdcm(desc_dma)) {
+			if (atomic_dec_and_test(&emac->tdown_cnt))
+				complete(&emac->tdown_complete);
+			break;
+		}
+
+		desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
+						     desc_dma);
+		swdata = cppi5_hdesc_get_swdata(desc_tx);
+
+		skb = *(swdata);
+		prueth_xmit_free(tx_chn, desc_tx);
+
+		ndev = skb->dev;
+		ndev->stats.tx_packets++;
+		ndev->stats.tx_bytes += skb->len;
+		total_bytes += skb->len;
+		napi_consume_skb(skb, budget);
+		num_tx++;
+	}
+
+	if (!num_tx)
+		return 0;
+
+	netif_txq = netdev_get_tx_queue(ndev, chn);
+	netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
+
+	if (netif_tx_queue_stopped(netif_txq)) {
+		/* If the TX queue was stopped, wake it now
+		 * if we have enough room.
+		 */
+		__netif_tx_lock(netif_txq, smp_processor_id());
+		if (netif_running(ndev) &&
+		    (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
+		     MAX_SKB_FRAGS))
+			netif_tx_wake_queue(netif_txq);
+		__netif_tx_unlock(netif_txq);
+	}
+
+	return num_tx;
+}
+
+static int emac_napi_tx_poll(struct napi_struct *napi_tx, int budget)
+{
+	struct prueth_tx_chn *tx_chn = prueth_napi_to_tx_chn(napi_tx);
+	struct prueth_emac *emac = tx_chn->emac;
+	int num_tx_packets;
+
+	num_tx_packets = emac_tx_complete_packets(emac, tx_chn->id, budget);
+
+	if (num_tx_packets >= budget)
+		return budget;
+
+	if (napi_complete_done(napi_tx, num_tx_packets))
+		enable_irq(tx_chn->irq);
+
+	return num_tx_packets;
+}
+
+static irqreturn_t prueth_tx_irq(int irq, void *dev_id)
+{
+	struct prueth_tx_chn *tx_chn = dev_id;
+
+	disable_irq_nosync(irq);
+	napi_schedule(&tx_chn->napi_tx);
+
+	return IRQ_HANDLED;
+}
+
+int prueth_ndev_add_tx_napi(struct prueth_emac *emac)
+{
+	struct prueth *prueth = emac->prueth;
+	int i, ret;
+
+	for (i = 0; i < emac->tx_ch_num; i++) {
+		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];
+
+		netif_napi_add_tx(emac->ndev, &tx_chn->napi_tx, emac_napi_tx_poll);
+		ret = request_irq(tx_chn->irq, prueth_tx_irq,
+				  IRQF_TRIGGER_HIGH, tx_chn->name,
+				  tx_chn);
+		if (ret) {
+			netif_napi_del(&tx_chn->napi_tx);
+			dev_err(prueth->dev, "unable to request TX IRQ %d\n",
+				tx_chn->irq);
+			goto fail;
+		}
+	}
+
+	return 0;
+fail:
+	prueth_ndev_del_tx_napi(emac, i);
+	return ret;
+}
+
+int prueth_init_tx_chns(struct prueth_emac *emac)
+{
+	static const struct k3_ring_cfg ring_cfg = {
+		.elm_size = K3_RINGACC_RING_ELSIZE_8,
+		.mode = K3_RINGACC_RING_MODE_RING,
+		.flags = 0,
+		.size = PRUETH_MAX_TX_DESC,
+	};
+	struct k3_udma_glue_tx_channel_cfg tx_cfg;
+	struct device *dev = emac->prueth->dev;
+	struct net_device *ndev = emac->ndev;
+	int ret, slice, i;
+	u32 hdesc_size;
+
+	slice = prueth_emac_slice(emac);
+	if (slice < 0)
+		return slice;
+
+	init_completion(&emac->tdown_complete);
+
+	hdesc_size = cppi5_hdesc_calc_size(true, PRUETH_NAV_PS_DATA_SIZE,
+					   PRUETH_NAV_SW_DATA_SIZE);
+	memset(&tx_cfg, 0, sizeof(tx_cfg));
+	tx_cfg.swdata_size = PRUETH_NAV_SW_DATA_SIZE;
+	tx_cfg.tx_cfg = ring_cfg;
+	tx_cfg.txcq_cfg = ring_cfg;
+
+	for (i = 0; i < emac->tx_ch_num; i++) {
+		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];
+
+		/* To differentiate channels for SLICE0 vs SLICE1 */
+		snprintf(tx_chn->name, sizeof(tx_chn->name),
+			 "tx%d-%d", slice, i);
+
+		tx_chn->emac = emac;
+		tx_chn->id = i;
+		tx_chn->descs_num = PRUETH_MAX_TX_DESC;
+
+		tx_chn->tx_chn =
+			k3_udma_glue_request_tx_chn(dev, tx_chn->name,
+						    &tx_cfg);
+		if (IS_ERR(tx_chn->tx_chn)) {
+			ret = PTR_ERR(tx_chn->tx_chn);
+			tx_chn->tx_chn = NULL;
+			netdev_err(ndev,
+				   "Failed to request tx dma ch: %d\n", ret);
+			goto fail;
+		}
+
+		tx_chn->dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn->tx_chn);
+		tx_chn->desc_pool =
+			k3_cppi_desc_pool_create_name(tx_chn->dma_dev,
+						      tx_chn->descs_num,
+						      hdesc_size,
+						      tx_chn->name);
+		if (IS_ERR(tx_chn->desc_pool)) {
+			ret = PTR_ERR(tx_chn->desc_pool);
+			tx_chn->desc_pool = NULL;
+			netdev_err(ndev, "Failed to create tx pool: %d\n", ret);
+			goto fail;
+		}
+
+		ret = k3_udma_glue_tx_get_irq(tx_chn->tx_chn);
+		if (ret < 0) {
+			netdev_err(ndev, "failed to get tx irq\n");
+			goto fail;
+		}
+		tx_chn->irq = ret;
+
+		snprintf(tx_chn->name, sizeof(tx_chn->name), "%s-tx%d",
+			 dev_name(dev), tx_chn->id);
+	}
+
+	return 0;
+
+fail:
+	prueth_cleanup_tx_chns(emac);
+	return ret;
+}
+
+int prueth_init_rx_chns(struct prueth_emac *emac,
+			struct prueth_rx_chn *rx_chn,
+			char *name, u32 max_rflows,
+			u32 max_desc_num)
+{
+	struct k3_udma_glue_rx_channel_cfg rx_cfg;
+	struct device *dev = emac->prueth->dev;
+	struct net_device *ndev = emac->ndev;
+	u32 fdqring_id, hdesc_size;
+	int i, ret = 0, slice;
+
+	slice = prueth_emac_slice(emac);
+	if (slice < 0)
+		return slice;
+
+	/* To differentiate channels for SLICE0 vs SLICE1 */
+	snprintf(rx_chn->name, sizeof(rx_chn->name), "%s%d", name, slice);
+
+	hdesc_size = cppi5_hdesc_calc_size(true, PRUETH_NAV_PS_DATA_SIZE,
+					   PRUETH_NAV_SW_DATA_SIZE);
+	memset(&rx_cfg, 0, sizeof(rx_cfg));
+	rx_cfg.swdata_size = PRUETH_NAV_SW_DATA_SIZE;
+	rx_cfg.flow_id_num = max_rflows;
+	rx_cfg.flow_id_base = -1; /* udmax will auto select flow id base */
+
+	/* init all flows */
+	rx_chn->dev = dev;
+	rx_chn->descs_num = max_desc_num;
+
+	rx_chn->rx_chn = k3_udma_glue_request_rx_chn(dev, rx_chn->name,
+						     &rx_cfg);
+	if (IS_ERR(rx_chn->rx_chn)) {
+		ret = PTR_ERR(rx_chn->rx_chn);
+		rx_chn->rx_chn = NULL;
+		netdev_err(ndev, "Failed to request rx dma ch: %d\n", ret);
+		goto fail;
+	}
+
+	rx_chn->dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn->rx_chn);
+	rx_chn->desc_pool = k3_cppi_desc_pool_create_name(rx_chn->dma_dev,
+							  rx_chn->descs_num,
+							  hdesc_size,
+							  rx_chn->name);
+	if (IS_ERR(rx_chn->desc_pool)) {
+		ret = PTR_ERR(rx_chn->desc_pool);
+		rx_chn->desc_pool = NULL;
+		netdev_err(ndev, "Failed to create rx pool: %d\n", ret);
+		goto fail;
+	}
+
+	emac->rx_flow_id_base = k3_udma_glue_rx_get_flow_id_base(rx_chn->rx_chn);
+	netdev_dbg(ndev, "flow id base = %d\n", emac->rx_flow_id_base);
+
+	fdqring_id = K3_RINGACC_RING_ID_ANY;
+	for (i = 0; i < rx_cfg.flow_id_num; i++) {
+		struct k3_ring_cfg rxring_cfg = {
+			.elm_size = K3_RINGACC_RING_ELSIZE_8,
+			.mode = K3_RINGACC_RING_MODE_RING,
+			.flags = 0,
+		};
+		struct k3_ring_cfg fdqring_cfg = {
+			.elm_size = K3_RINGACC_RING_ELSIZE_8,
+			.flags = K3_RINGACC_RING_SHARED,
+		};
+		struct k3_udma_glue_rx_flow_cfg rx_flow_cfg = {
+			.rx_cfg = rxring_cfg,
+			.rxfdq_cfg = fdqring_cfg,
+			.ring_rxq_id = K3_RINGACC_RING_ID_ANY,
+			.src_tag_lo_sel =
+				K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG,
+		};
+
+		rx_flow_cfg.ring_rxfdq0_id = fdqring_id;
+		rx_flow_cfg.rx_cfg.size = max_desc_num;
+		rx_flow_cfg.rxfdq_cfg.size = max_desc_num;
+		rx_flow_cfg.rxfdq_cfg.mode = emac->prueth->pdata.fdqring_mode;
+
+		ret = k3_udma_glue_rx_flow_init(rx_chn->rx_chn,
+						i, &rx_flow_cfg);
+		if (ret) {
+			netdev_err(ndev, "Failed to init rx flow%d %d\n",
+				   i, ret);
+			goto fail;
+		}
+		if (!i)
+			fdqring_id = k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn,
+								     i);
+		rx_chn->irq[i] = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i);
+		if (rx_chn->irq[i] <= 0) {
+			ret = rx_chn->irq[i];
+			netdev_err(ndev, "Failed to get rx dma irq");
+			goto fail;
+		}
+	}
+
+	return 0;
+
+fail:
+	prueth_cleanup_rx_chns(emac, rx_chn, max_rflows);
+	return ret;
+}
+
+int prueth_dma_rx_push(struct prueth_emac *emac,
+		       struct sk_buff *skb,
+		       struct prueth_rx_chn *rx_chn)
+{
+	struct net_device *ndev = emac->ndev;
+	struct cppi5_host_desc_t *desc_rx;
+	u32 pkt_len = skb_tailroom(skb);
+	dma_addr_t desc_dma;
+	dma_addr_t buf_dma;
+	void **swdata;
+
+	desc_rx = k3_cppi_desc_pool_alloc(rx_chn->desc_pool);
+	if (!desc_rx) {
+		netdev_err(ndev, "rx push: failed to allocate descriptor\n");
+		return -ENOMEM;
+	}
+	desc_dma = k3_cppi_desc_pool_virt2dma(rx_chn->desc_pool, desc_rx);
+
+	buf_dma = dma_map_single(rx_chn->dma_dev, skb->data, pkt_len, DMA_FROM_DEVICE);
+	if (unlikely(dma_mapping_error(rx_chn->dma_dev, buf_dma))) {
+		k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
+		netdev_err(ndev, "rx push: failed to map rx pkt buffer\n");
+		return -EINVAL;
+	}
+
+	cppi5_hdesc_init(desc_rx, CPPI5_INFO0_HDESC_EPIB_PRESENT,
+			 PRUETH_NAV_PS_DATA_SIZE);
+	k3_udma_glue_rx_dma_to_cppi5_addr(rx_chn->rx_chn, &buf_dma);
+	cppi5_hdesc_attach_buf(desc_rx, buf_dma, skb_tailroom(skb), buf_dma, skb_tailroom(skb));
+
+	swdata = cppi5_hdesc_get_swdata(desc_rx);
+	*swdata = skb;
+
+	return k3_udma_glue_push_rx_chn(rx_chn->rx_chn, 0,
+					desc_rx, desc_dma);
+}
+
+u64 icssg_ts_to_ns(u32 hi_sw, u32 hi, u32 lo, u32 cycle_time_ns)
+{
+	u32 iepcount_lo, iepcount_hi, hi_rollover_count;
+	u64 ns;
+
+	iepcount_lo = lo & GENMASK(19, 0);
+	iepcount_hi = (hi & GENMASK(11, 0)) << 12 | lo >> 20;
+	hi_rollover_count = hi >> 11;
+
+	ns = ((u64)hi_rollover_count) << 23 | (iepcount_hi + hi_sw);
+	ns = ns * cycle_time_ns + iepcount_lo;
+
+	return ns;
+}
+
+void emac_rx_timestamp(struct prueth_emac *emac,
+		       struct sk_buff *skb, u32 *psdata)
+{
+	struct skb_shared_hwtstamps *ssh;
+	u64 ns;
+
+	u32 hi_sw = readl(emac->prueth->shram.va +
+			  TIMESYNC_FW_WC_COUNT_HI_SW_OFFSET_OFFSET);
+	ns = icssg_ts_to_ns(hi_sw, psdata[1], psdata[0],
+			    IEP_DEFAULT_CYCLE_TIME_NS);
+
+	ssh = skb_hwtstamps(skb);
+	memset(ssh, 0, sizeof(*ssh));
+	ssh->hwtstamp = ns_to_ktime(ns);
+}
+
+static int emac_rx_packet(struct prueth_emac *emac, u32 flow_id)
+{
+	struct prueth_rx_chn *rx_chn = &emac->rx_chns;
+	u32 buf_dma_len, pkt_len, port_id = 0;
+	struct net_device *ndev = emac->ndev;
+	struct cppi5_host_desc_t *desc_rx;
+	struct sk_buff *skb, *new_skb;
+	dma_addr_t desc_dma, buf_dma;
+	void **swdata;
+	u32 *psdata;
+	int ret;
+
+	ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_id, &desc_dma);
+	if (ret) {
+		if (ret != -ENODATA)
+			netdev_err(ndev, "rx pop: failed: %d\n", ret);
+		return ret;
+	}
+
+	if (cppi5_desc_is_tdcm(desc_dma)) /* Teardown ? */
+		return 0;
+
+	desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
+
+	swdata = cppi5_hdesc_get_swdata(desc_rx);
+	skb = *swdata;
+
+	psdata = cppi5_hdesc_get_psdata(desc_rx);
+	/* RX HW timestamp */
+	if (emac->rx_ts_enabled)
+		emac_rx_timestamp(emac, skb, psdata);
+
+	cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
+	k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
+	pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
+	/* firmware adds 4 CRC bytes, strip them */
+	pkt_len -= 4;
+	cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
+
+	dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
+	k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
+
+	skb->dev = ndev;
+	new_skb = netdev_alloc_skb_ip_align(ndev, PRUETH_MAX_PKT_SIZE);
+	/* if allocation fails we drop the packet but push the
+	 * descriptor back to the ring with old skb to prevent a stall
+	 */
+	if (!new_skb) {
+		ndev->stats.rx_dropped++;
+		new_skb = skb;
+	} else {
+		/* send the filled skb up the n/w stack */
+		skb_put(skb, pkt_len);
+		skb->protocol = eth_type_trans(skb, ndev);
+		napi_gro_receive(&emac->napi_rx, skb);
+		ndev->stats.rx_bytes += pkt_len;
+		ndev->stats.rx_packets++;
+	}
+
+	/* queue another RX DMA */
+	ret = prueth_dma_rx_push(emac, new_skb, &emac->rx_chns);
+	if (WARN_ON(ret < 0)) {
+		dev_kfree_skb_any(new_skb);
+		ndev->stats.rx_errors++;
+		ndev->stats.rx_dropped++;
+	}
+
+	return ret;
+}
+
+static void prueth_rx_cleanup(void *data, dma_addr_t desc_dma)
+{
+	struct prueth_rx_chn *rx_chn = data;
+	struct cppi5_host_desc_t *desc_rx;
+	struct sk_buff *skb;
+	dma_addr_t buf_dma;
+	u32 buf_dma_len;
+	void **swdata;
+
+	desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
+	swdata = cppi5_hdesc_get_swdata(desc_rx);
+	skb = *swdata;
+	cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
+	k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
+
+	dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len,
+			 DMA_FROM_DEVICE);
+	k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
+
+	dev_kfree_skb_any(skb);
+}
+
+static int prueth_tx_ts_cookie_get(struct prueth_emac *emac)
+{
+	int i;
+
+	/* search and get the next free slot */
+	for (i = 0; i < PRUETH_MAX_TX_TS_REQUESTS; i++) {
+		if (!emac->tx_ts_skb[i]) {
+			emac->tx_ts_skb[i] = ERR_PTR(-EBUSY); /* reserve slot */
+			return i;
+		}
+	}
+
+	return -EBUSY;
+}
+
+/**
+ * emac_ndo_start_xmit - EMAC Transmit function
+ * @skb: SKB pointer
+ * @ndev: EMAC network adapter
+ *
+ * Called by the system to transmit a packet  - we queue the packet in
+ * EMAC hardware transmit queue
+ * Doesn't wait for completion we'll check for TX completion in
+ * emac_tx_complete_packets().
+ *
+ * Return: enum netdev_tx
+ */
+enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+	struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc;
+	struct prueth_emac *emac = netdev_priv(ndev);
+	struct netdev_queue *netif_txq;
+	struct prueth_tx_chn *tx_chn;
+	dma_addr_t desc_dma, buf_dma;
+	int i, ret = 0, q_idx;
+	bool in_tx_ts = 0;
+	int tx_ts_cookie;
+	void **swdata;
+	u32 pkt_len;
+	u32 *epib;
+
+	pkt_len = skb_headlen(skb);
+	q_idx = skb_get_queue_mapping(skb);
+
+	tx_chn = &emac->tx_chns[q_idx];
+	netif_txq = netdev_get_tx_queue(ndev, q_idx);
+
+	/* Map the linear buffer */
+	buf_dma = dma_map_single(tx_chn->dma_dev, skb->data, pkt_len, DMA_TO_DEVICE);
+	if (dma_mapping_error(tx_chn->dma_dev, buf_dma)) {
+		netdev_err(ndev, "tx: failed to map skb buffer\n");
+		ret = NETDEV_TX_OK;
+		goto drop_free_skb;
+	}
+
+	first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
+	if (!first_desc) {
+		netdev_dbg(ndev, "tx: failed to allocate descriptor\n");
+		dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len, DMA_TO_DEVICE);
+		goto drop_stop_q_busy;
+	}
+
+	cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT,
+			 PRUETH_NAV_PS_DATA_SIZE);
+	cppi5_hdesc_set_pkttype(first_desc, 0);
+	epib = first_desc->epib;
+	epib[0] = 0;
+	epib[1] = 0;
+	if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
+	    emac->tx_ts_enabled) {
+		tx_ts_cookie = prueth_tx_ts_cookie_get(emac);
+		if (tx_ts_cookie >= 0) {
+			skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+			/* Request TX timestamp */
+			epib[0] = (u32)tx_ts_cookie;
+			epib[1] = 0x80000000;	/* TX TS request */
+			emac->tx_ts_skb[tx_ts_cookie] = skb_get(skb);
+			in_tx_ts = 1;
+		}
+	}
+
+	/* set dst tag to indicate internal qid at the firmware which is at
+	 * bit8..bit15. bit0..bit7 indicates port num for directed
+	 * packets in case of switch mode operation
+	 */
+	cppi5_desc_set_tags_ids(&first_desc->hdr, 0, (emac->port_id | (q_idx << 8)));
+	k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
+	cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
+	swdata = cppi5_hdesc_get_swdata(first_desc);
+	*swdata = skb;
+
+	/* Handle the case where skb is fragmented in pages */
+	cur_desc = first_desc;
+	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+		u32 frag_size = skb_frag_size(frag);
+
+		next_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
+		if (!next_desc) {
+			netdev_err(ndev,
+				   "tx: failed to allocate frag. descriptor\n");
+			goto free_desc_stop_q_busy_cleanup_tx_ts;
+		}
+
+		buf_dma = skb_frag_dma_map(tx_chn->dma_dev, frag, 0, frag_size,
+					   DMA_TO_DEVICE);
+		if (dma_mapping_error(tx_chn->dma_dev, buf_dma)) {
+			netdev_err(ndev, "tx: Failed to map skb page\n");
+			k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
+			ret = NETDEV_TX_OK;
+			goto cleanup_tx_ts;
+		}
+
+		cppi5_hdesc_reset_hbdesc(next_desc);
+		k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
+		cppi5_hdesc_attach_buf(next_desc,
+				       buf_dma, frag_size, buf_dma, frag_size);
+
+		desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool,
+						      next_desc);
+		k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &desc_dma);
+		cppi5_hdesc_link_hbdesc(cur_desc, desc_dma);
+
+		pkt_len += frag_size;
+		cur_desc = next_desc;
+	}
+	WARN_ON_ONCE(pkt_len != skb->len);
+
+	/* report bql before sending packet */
+	netdev_tx_sent_queue(netif_txq, pkt_len);
+
+	cppi5_hdesc_set_pktlen(first_desc, pkt_len);
+	desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc);
+	/* cppi5_desc_dump(first_desc, 64); */
+
+	skb_tx_timestamp(skb);  /* SW timestamp if SKBTX_IN_PROGRESS not set */
+	ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
+	if (ret) {
+		netdev_err(ndev, "tx: push failed: %d\n", ret);
+		goto drop_free_descs;
+	}
+
+	if (in_tx_ts)
+		atomic_inc(&emac->tx_ts_pending);
+
+	if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) < MAX_SKB_FRAGS) {
+		netif_tx_stop_queue(netif_txq);
+		/* Barrier, so that stop_queue visible to other cpus */
+		smp_mb__after_atomic();
+
+		if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
+		    MAX_SKB_FRAGS)
+			netif_tx_wake_queue(netif_txq);
+	}
+
+	return NETDEV_TX_OK;
+
+cleanup_tx_ts:
+	if (in_tx_ts) {
+		dev_kfree_skb_any(emac->tx_ts_skb[tx_ts_cookie]);
+		emac->tx_ts_skb[tx_ts_cookie] = NULL;
+	}
+
+drop_free_descs:
+	prueth_xmit_free(tx_chn, first_desc);
+
+drop_free_skb:
+	dev_kfree_skb_any(skb);
+
+	/* error */
+	ndev->stats.tx_dropped++;
+	netdev_err(ndev, "tx: error: %d\n", ret);
+
+	return ret;
+
+free_desc_stop_q_busy_cleanup_tx_ts:
+	if (in_tx_ts) {
+		dev_kfree_skb_any(emac->tx_ts_skb[tx_ts_cookie]);
+		emac->tx_ts_skb[tx_ts_cookie] = NULL;
+	}
+	prueth_xmit_free(tx_chn, first_desc);
+
+drop_stop_q_busy:
+	netif_tx_stop_queue(netif_txq);
+	return NETDEV_TX_BUSY;
+}
+
+static void prueth_tx_cleanup(void *data, dma_addr_t desc_dma)
+{
+	struct prueth_tx_chn *tx_chn = data;
+	struct cppi5_host_desc_t *desc_tx;
+	struct sk_buff *skb;
+	void **swdata;
+
+	desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma);
+	swdata = cppi5_hdesc_get_swdata(desc_tx);
+	skb = *(swdata);
+	prueth_xmit_free(tx_chn, desc_tx);
+
+	dev_kfree_skb_any(skb);
+}
+
+irqreturn_t prueth_rx_irq(int irq, void *dev_id)
+{
+	struct prueth_emac *emac = dev_id;
+
+	disable_irq_nosync(irq);
+	napi_schedule(&emac->napi_rx);
+
+	return IRQ_HANDLED;
+}
+
+void prueth_emac_stop(struct prueth_emac *emac)
+{
+	struct prueth *prueth = emac->prueth;
+	int slice;
+
+	switch (emac->port_id) {
+	case PRUETH_PORT_MII0:
+		slice = ICSS_SLICE0;
+		break;
+	case PRUETH_PORT_MII1:
+		slice = ICSS_SLICE1;
+		break;
+	default:
+		netdev_err(emac->ndev, "invalid port\n");
+		return;
+	}
+
+	emac->fw_running = 0;
+	rproc_shutdown(prueth->txpru[slice]);
+	rproc_shutdown(prueth->rtu[slice]);
+	rproc_shutdown(prueth->pru[slice]);
+}
+
+void prueth_cleanup_tx_ts(struct prueth_emac *emac)
+{
+	int i;
+
+	for (i = 0; i < PRUETH_MAX_TX_TS_REQUESTS; i++) {
+		if (emac->tx_ts_skb[i]) {
+			dev_kfree_skb_any(emac->tx_ts_skb[i]);
+			emac->tx_ts_skb[i] = NULL;
+		}
+	}
+}
+
+int emac_napi_rx_poll(struct napi_struct *napi_rx, int budget)
+{
+	struct prueth_emac *emac = prueth_napi_to_emac(napi_rx);
+	int rx_flow = PRUETH_RX_FLOW_DATA;
+	int flow = PRUETH_MAX_RX_FLOWS;
+	int num_rx = 0;
+	int cur_budget;
+	int ret;
+
+	while (flow--) {
+		cur_budget = budget - num_rx;
+
+		while (cur_budget--) {
+			ret = emac_rx_packet(emac, flow);
+			if (ret)
+				break;
+			num_rx++;
+		}
+
+		if (num_rx >= budget)
+			break;
+	}
+
+	if (num_rx < budget && napi_complete_done(napi_rx, num_rx))
+		enable_irq(emac->rx_chns.irq[rx_flow]);
+
+	return num_rx;
+}
+
+int prueth_prepare_rx_chan(struct prueth_emac *emac,
+			   struct prueth_rx_chn *chn,
+			   int buf_size)
+{
+	struct sk_buff *skb;
+	int i, ret;
+
+	for (i = 0; i < chn->descs_num; i++) {
+		skb = __netdev_alloc_skb_ip_align(NULL, buf_size, GFP_KERNEL);
+		if (!skb)
+			return -ENOMEM;
+
+		ret = prueth_dma_rx_push(emac, skb, chn);
+		if (ret < 0) {
+			netdev_err(emac->ndev,
+				   "cannot submit skb for rx chan %s ret %d\n",
+				   chn->name, ret);
+			kfree_skb(skb);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+void prueth_reset_tx_chan(struct prueth_emac *emac, int ch_num,
+			  bool free_skb)
+{
+	int i;
+
+	for (i = 0; i < ch_num; i++) {
+		if (free_skb)
+			k3_udma_glue_reset_tx_chn(emac->tx_chns[i].tx_chn,
+						  &emac->tx_chns[i],
+						  prueth_tx_cleanup);
+		k3_udma_glue_disable_tx_chn(emac->tx_chns[i].tx_chn);
+	}
+}
+
+void prueth_reset_rx_chan(struct prueth_rx_chn *chn,
+			  int num_flows, bool disable)
+{
+	int i;
+
+	for (i = 0; i < num_flows; i++)
+		k3_udma_glue_reset_rx_chn(chn->rx_chn, i, chn,
+					  prueth_rx_cleanup, !!i);
+	if (disable)
+		k3_udma_glue_disable_rx_chn(chn->rx_chn);
+}
+
+void emac_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue)
+{
+	ndev->stats.tx_errors++;
+}
+
+static int emac_set_ts_config(struct net_device *ndev, struct ifreq *ifr)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+	struct hwtstamp_config config;
+
+	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
+		return -EFAULT;
+
+	switch (config.tx_type) {
+	case HWTSTAMP_TX_OFF:
+		emac->tx_ts_enabled = 0;
+		break;
+	case HWTSTAMP_TX_ON:
+		emac->tx_ts_enabled = 1;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	switch (config.rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		emac->rx_ts_enabled = 0;
+		break;
+	case HWTSTAMP_FILTER_ALL:
+	case HWTSTAMP_FILTER_SOME:
+	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+	case HWTSTAMP_FILTER_NTP_ALL:
+		emac->rx_ts_enabled = 1;
+		config.rx_filter = HWTSTAMP_FILTER_ALL;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
+		-EFAULT : 0;
+}
+
+static int emac_get_ts_config(struct net_device *ndev, struct ifreq *ifr)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+	struct hwtstamp_config config;
+
+	config.flags = 0;
+	config.tx_type = emac->tx_ts_enabled ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
+	config.rx_filter = emac->rx_ts_enabled ? HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
+
+	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
+			    -EFAULT : 0;
+}
+
+int emac_ndo_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
+{
+	switch (cmd) {
+	case SIOCGHWTSTAMP:
+		return emac_get_ts_config(ndev, ifr);
+	case SIOCSHWTSTAMP:
+		return emac_set_ts_config(ndev, ifr);
+	default:
+		break;
+	}
+
+	return phy_do_ioctl(ndev, ifr, cmd);
+}
+
+void emac_ndo_get_stats64(struct net_device *ndev,
+			  struct rtnl_link_stats64 *stats)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+
+	emac_update_hardware_stats(emac);
+
+	stats->rx_packets     = emac_get_stat_by_name(emac, "rx_packets");
+	stats->rx_bytes       = emac_get_stat_by_name(emac, "rx_bytes");
+	stats->tx_packets     = emac_get_stat_by_name(emac, "tx_packets");
+	stats->tx_bytes       = emac_get_stat_by_name(emac, "tx_bytes");
+	stats->rx_crc_errors  = emac_get_stat_by_name(emac, "rx_crc_errors");
+	stats->rx_over_errors = emac_get_stat_by_name(emac, "rx_over_errors");
+	stats->multicast      = emac_get_stat_by_name(emac, "rx_multicast_frames");
+
+	stats->rx_errors  = ndev->stats.rx_errors;
+	stats->rx_dropped = ndev->stats.rx_dropped;
+	stats->tx_errors  = ndev->stats.tx_errors;
+	stats->tx_dropped = ndev->stats.tx_dropped;
+}
+
+int emac_ndo_get_phys_port_name(struct net_device *ndev, char *name,
+				size_t len)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+	int ret;
+
+	ret = snprintf(name, len, "p%d", emac->port_id);
+	if (ret >= len)
+		return -EINVAL;
+
+	return 0;
+}
+
+/* get emac_port corresponding to eth_node name */
+int prueth_node_port(struct device_node *eth_node)
+{
+	u32 port_id;
+	int ret;
+
+	ret = of_property_read_u32(eth_node, "reg", &port_id);
+	if (ret)
+		return ret;
+
+	if (port_id == 0)
+		return PRUETH_PORT_MII0;
+	else if (port_id == 1)
+		return PRUETH_PORT_MII1;
+	else
+		return PRUETH_PORT_INVALID;
+}
+
+/* get MAC instance corresponding to eth_node name */
+int prueth_node_mac(struct device_node *eth_node)
+{
+	u32 port_id;
+	int ret;
+
+	ret = of_property_read_u32(eth_node, "reg", &port_id);
+	if (ret)
+		return ret;
+
+	if (port_id == 0)
+		return PRUETH_MAC0;
+	else if (port_id == 1)
+		return PRUETH_MAC1;
+	else
+		return PRUETH_MAC_INVALID;
+}
+
+void prueth_netdev_exit(struct prueth *prueth,
+			struct device_node *eth_node)
+{
+	struct prueth_emac *emac;
+	enum prueth_mac mac;
+
+	mac = prueth_node_mac(eth_node);
+	if (mac == PRUETH_MAC_INVALID)
+		return;
+
+	emac = prueth->emac[mac];
+	if (!emac)
+		return;
+
+	if (of_phy_is_fixed_link(emac->phy_node))
+		of_phy_deregister_fixed_link(emac->phy_node);
+
+	netif_napi_del(&emac->napi_rx);
+
+	pruss_release_mem_region(prueth->pruss, &emac->dram);
+	destroy_workqueue(emac->cmd_wq);
+	free_netdev(emac->ndev);
+	prueth->emac[mac] = NULL;
+}
+
+int prueth_get_cores(struct prueth *prueth, int slice)
+{
+	struct device *dev = prueth->dev;
+	enum pruss_pru_id pruss_id;
+	struct device_node *np;
+	int idx = -1, ret;
+
+	np = dev->of_node;
+
+	switch (slice) {
+	case ICSS_SLICE0:
+		idx = 0;
+		break;
+	case ICSS_SLICE1:
+		idx = 3;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	prueth->pru[slice] = pru_rproc_get(np, idx, &pruss_id);
+	if (IS_ERR(prueth->pru[slice])) {
+		ret = PTR_ERR(prueth->pru[slice]);
+		prueth->pru[slice] = NULL;
+		return dev_err_probe(dev, ret, "unable to get PRU%d\n", slice);
+	}
+	prueth->pru_id[slice] = pruss_id;
+
+	idx++;
+	prueth->rtu[slice] = pru_rproc_get(np, idx, NULL);
+	if (IS_ERR(prueth->rtu[slice])) {
+		ret = PTR_ERR(prueth->rtu[slice]);
+		prueth->rtu[slice] = NULL;
+		return dev_err_probe(dev, ret, "unable to get RTU%d\n", slice);
+	}
+
+	idx++;
+	prueth->txpru[slice] = pru_rproc_get(np, idx, NULL);
+	if (IS_ERR(prueth->txpru[slice])) {
+		ret = PTR_ERR(prueth->txpru[slice]);
+		prueth->txpru[slice] = NULL;
+		return dev_err_probe(dev, ret, "unable to get TX_PRU%d\n", slice);
+	}
+
+	return 0;
+}
+
+void prueth_put_cores(struct prueth *prueth, int slice)
+{
+	if (prueth->txpru[slice])
+		pru_rproc_put(prueth->txpru[slice]);
+
+	if (prueth->rtu[slice])
+		pru_rproc_put(prueth->rtu[slice]);
+
+	if (prueth->pru[slice])
+		pru_rproc_put(prueth->pru[slice]);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int prueth_suspend(struct device *dev)
+{
+	struct prueth *prueth = dev_get_drvdata(dev);
+	struct net_device *ndev;
+	int i, ret;
+
+	for (i = 0; i < PRUETH_NUM_MACS; i++) {
+		ndev = prueth->registered_netdevs[i];
+
+		if (!ndev)
+			continue;
+
+		if (netif_running(ndev)) {
+			netif_device_detach(ndev);
+			ret = ndev->netdev_ops->ndo_stop(ndev);
+			if (ret < 0) {
+				netdev_err(ndev, "failed to stop: %d", ret);
+				return ret;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int prueth_resume(struct device *dev)
+{
+	struct prueth *prueth = dev_get_drvdata(dev);
+	struct net_device *ndev;
+	int i, ret;
+
+	for (i = 0; i < PRUETH_NUM_MACS; i++) {
+		ndev = prueth->registered_netdevs[i];
+
+		if (!ndev)
+			continue;
+
+		if (netif_running(ndev)) {
+			ret = ndev->netdev_ops->ndo_open(ndev);
+			if (ret < 0) {
+				netdev_err(ndev, "failed to start: %d", ret);
+				return ret;
+			}
+			netif_device_attach(ndev);
+		}
+	}
+
+	return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+const struct dev_pm_ops prueth_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(prueth_suspend, prueth_resume)
+};
diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
index cf7b73f8f450..e6eac01f9f99 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
@@ -34,568 +34,9 @@
 
 #define PRUETH_MODULE_DESCRIPTION "PRUSS ICSSG Ethernet driver"
 
-/* Netif debug messages possible */
-#define PRUETH_EMAC_DEBUG       (NETIF_MSG_DRV | \
-				 NETIF_MSG_PROBE | \
-				 NETIF_MSG_LINK | \
-				 NETIF_MSG_TIMER | \
-				 NETIF_MSG_IFDOWN | \
-				 NETIF_MSG_IFUP | \
-				 NETIF_MSG_RX_ERR | \
-				 NETIF_MSG_TX_ERR | \
-				 NETIF_MSG_TX_QUEUED | \
-				 NETIF_MSG_INTR | \
-				 NETIF_MSG_TX_DONE | \
-				 NETIF_MSG_RX_STATUS | \
-				 NETIF_MSG_PKTDATA | \
-				 NETIF_MSG_HW | \
-				 NETIF_MSG_WOL)
-
-#define prueth_napi_to_emac(napi) container_of(napi, struct prueth_emac, napi_rx)
-
 /* CTRLMMR_ICSSG_RGMII_CTRL register bits */
 #define ICSSG_CTRL_RGMII_ID_MODE                BIT(24)
 
-#define IEP_DEFAULT_CYCLE_TIME_NS	1000000	/* 1 ms */
-
-static void prueth_cleanup_rx_chns(struct prueth_emac *emac,
-				   struct prueth_rx_chn *rx_chn,
-				   int max_rflows)
-{
-	if (rx_chn->desc_pool)
-		k3_cppi_desc_pool_destroy(rx_chn->desc_pool);
-
-	if (rx_chn->rx_chn)
-		k3_udma_glue_release_rx_chn(rx_chn->rx_chn);
-}
-
-static void prueth_cleanup_tx_chns(struct prueth_emac *emac)
-{
-	int i;
-
-	for (i = 0; i < emac->tx_ch_num; i++) {
-		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];
-
-		if (tx_chn->desc_pool)
-			k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
-
-		if (tx_chn->tx_chn)
-			k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
-
-		/* Assume prueth_cleanup_tx_chns() is called at the
-		 * end after all channel resources are freed
-		 */
-		memset(tx_chn, 0, sizeof(*tx_chn));
-	}
-}
-
-static void prueth_ndev_del_tx_napi(struct prueth_emac *emac, int num)
-{
-	int i;
-
-	for (i = 0; i < num; i++) {
-		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];
-
-		if (tx_chn->irq)
-			free_irq(tx_chn->irq, tx_chn);
-		netif_napi_del(&tx_chn->napi_tx);
-	}
-}
-
-static void prueth_xmit_free(struct prueth_tx_chn *tx_chn,
-			     struct cppi5_host_desc_t *desc)
-{
-	struct cppi5_host_desc_t *first_desc, *next_desc;
-	dma_addr_t buf_dma, next_desc_dma;
-	u32 buf_dma_len;
-
-	first_desc = desc;
-	next_desc = first_desc;
-
-	cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len);
-	k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
-
-	dma_unmap_single(tx_chn->dma_dev, buf_dma, buf_dma_len,
-			 DMA_TO_DEVICE);
-
-	next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc);
-	k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
-	while (next_desc_dma) {
-		next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
-						       next_desc_dma);
-		cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len);
-		k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
-
-		dma_unmap_page(tx_chn->dma_dev, buf_dma, buf_dma_len,
-			       DMA_TO_DEVICE);
-
-		next_desc_dma = cppi5_hdesc_get_next_hbdesc(next_desc);
-		k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
-
-		k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
-	}
-
-	k3_cppi_desc_pool_free(tx_chn->desc_pool, first_desc);
-}
-
-static int emac_tx_complete_packets(struct prueth_emac *emac, int chn,
-				    int budget)
-{
-	struct net_device *ndev = emac->ndev;
-	struct cppi5_host_desc_t *desc_tx;
-	struct netdev_queue *netif_txq;
-	struct prueth_tx_chn *tx_chn;
-	unsigned int total_bytes = 0;
-	struct sk_buff *skb;
-	dma_addr_t desc_dma;
-	int res, num_tx = 0;
-	void **swdata;
-
-	tx_chn = &emac->tx_chns[chn];
-
-	while (true) {
-		res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
-		if (res == -ENODATA)
-			break;
-
-		/* teardown completion */
-		if (cppi5_desc_is_tdcm(desc_dma)) {
-			if (atomic_dec_and_test(&emac->tdown_cnt))
-				complete(&emac->tdown_complete);
-			break;
-		}
-
-		desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
-						     desc_dma);
-		swdata = cppi5_hdesc_get_swdata(desc_tx);
-
-		skb = *(swdata);
-		prueth_xmit_free(tx_chn, desc_tx);
-
-		ndev = skb->dev;
-		ndev->stats.tx_packets++;
-		ndev->stats.tx_bytes += skb->len;
-		total_bytes += skb->len;
-		napi_consume_skb(skb, budget);
-		num_tx++;
-	}
-
-	if (!num_tx)
-		return 0;
-
-	netif_txq = netdev_get_tx_queue(ndev, chn);
-	netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
-
-	if (netif_tx_queue_stopped(netif_txq)) {
-		/* If the TX queue was stopped, wake it now
-		 * if we have enough room.
-		 */
-		__netif_tx_lock(netif_txq, smp_processor_id());
-		if (netif_running(ndev) &&
-		    (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
-		     MAX_SKB_FRAGS))
-			netif_tx_wake_queue(netif_txq);
-		__netif_tx_unlock(netif_txq);
-	}
-
-	return num_tx;
-}
-
-static int emac_napi_tx_poll(struct napi_struct *napi_tx, int budget)
-{
-	struct prueth_tx_chn *tx_chn = prueth_napi_to_tx_chn(napi_tx);
-	struct prueth_emac *emac = tx_chn->emac;
-	int num_tx_packets;
-
-	num_tx_packets = emac_tx_complete_packets(emac, tx_chn->id, budget);
-
-	if (num_tx_packets >= budget)
-		return budget;
-
-	if (napi_complete_done(napi_tx, num_tx_packets))
-		enable_irq(tx_chn->irq);
-
-	return num_tx_packets;
-}
-
-static irqreturn_t prueth_tx_irq(int irq, void *dev_id)
-{
-	struct prueth_tx_chn *tx_chn = dev_id;
-
-	disable_irq_nosync(irq);
-	napi_schedule(&tx_chn->napi_tx);
-
-	return IRQ_HANDLED;
-}
-
-static int prueth_ndev_add_tx_napi(struct prueth_emac *emac)
-{
-	struct prueth *prueth = emac->prueth;
-	int i, ret;
-
-	for (i = 0; i < emac->tx_ch_num; i++) {
-		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];
-
-		netif_napi_add_tx(emac->ndev, &tx_chn->napi_tx, emac_napi_tx_poll);
-		ret = request_irq(tx_chn->irq, prueth_tx_irq,
-				  IRQF_TRIGGER_HIGH, tx_chn->name,
-				  tx_chn);
-		if (ret) {
-			netif_napi_del(&tx_chn->napi_tx);
-			dev_err(prueth->dev, "unable to request TX IRQ %d\n",
-				tx_chn->irq);
-			goto fail;
-		}
-	}
-
-	return 0;
-fail:
-	prueth_ndev_del_tx_napi(emac, i);
-	return ret;
-}
-
-static int prueth_init_tx_chns(struct prueth_emac *emac)
-{
-	static const struct k3_ring_cfg ring_cfg = {
-		.elm_size = K3_RINGACC_RING_ELSIZE_8,
-		.mode = K3_RINGACC_RING_MODE_RING,
-		.flags = 0,
-		.size = PRUETH_MAX_TX_DESC,
-	};
-	struct k3_udma_glue_tx_channel_cfg tx_cfg;
-	struct device *dev = emac->prueth->dev;
-	struct net_device *ndev = emac->ndev;
-	int ret, slice, i;
-	u32 hdesc_size;
-
-	slice = prueth_emac_slice(emac);
-	if (slice < 0)
-		return slice;
-
-	init_completion(&emac->tdown_complete);
-
-	hdesc_size = cppi5_hdesc_calc_size(true, PRUETH_NAV_PS_DATA_SIZE,
-					   PRUETH_NAV_SW_DATA_SIZE);
-	memset(&tx_cfg, 0, sizeof(tx_cfg));
-	tx_cfg.swdata_size = PRUETH_NAV_SW_DATA_SIZE;
-	tx_cfg.tx_cfg = ring_cfg;
-	tx_cfg.txcq_cfg = ring_cfg;
-
-	for (i = 0; i < emac->tx_ch_num; i++) {
-		struct prueth_tx_chn *tx_chn = &emac->tx_chns[i];
-
-		/* To differentiate channels for SLICE0 vs SLICE1 */
-		snprintf(tx_chn->name, sizeof(tx_chn->name),
-			 "tx%d-%d", slice, i);
-
-		tx_chn->emac = emac;
-		tx_chn->id = i;
-		tx_chn->descs_num = PRUETH_MAX_TX_DESC;
-
-		tx_chn->tx_chn =
-			k3_udma_glue_request_tx_chn(dev, tx_chn->name,
-						    &tx_cfg);
-		if (IS_ERR(tx_chn->tx_chn)) {
-			ret = PTR_ERR(tx_chn->tx_chn);
-			tx_chn->tx_chn = NULL;
-			netdev_err(ndev,
-				   "Failed to request tx dma ch: %d\n", ret);
-			goto fail;
-		}
-
-		tx_chn->dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn->tx_chn);
-		tx_chn->desc_pool =
-			k3_cppi_desc_pool_create_name(tx_chn->dma_dev,
-						      tx_chn->descs_num,
-						      hdesc_size,
-						      tx_chn->name);
-		if (IS_ERR(tx_chn->desc_pool)) {
-			ret = PTR_ERR(tx_chn->desc_pool);
-			tx_chn->desc_pool = NULL;
-			netdev_err(ndev, "Failed to create tx pool: %d\n", ret);
-			goto fail;
-		}
-
-		ret = k3_udma_glue_tx_get_irq(tx_chn->tx_chn);
-		if (ret < 0) {
-			netdev_err(ndev, "failed to get tx irq\n");
-			goto fail;
-		}
-		tx_chn->irq = ret;
-
-		snprintf(tx_chn->name, sizeof(tx_chn->name), "%s-tx%d",
-			 dev_name(dev), tx_chn->id);
-	}
-
-	return 0;
-
-fail:
-	prueth_cleanup_tx_chns(emac);
-	return ret;
-}
-
-static int prueth_init_rx_chns(struct prueth_emac *emac,
-			       struct prueth_rx_chn *rx_chn,
-			       char *name, u32 max_rflows,
-			       u32 max_desc_num)
-{
-	struct k3_udma_glue_rx_channel_cfg rx_cfg;
-	struct device *dev = emac->prueth->dev;
-	struct net_device *ndev = emac->ndev;
-	u32 fdqring_id, hdesc_size;
-	int i, ret = 0, slice;
-
-	slice = prueth_emac_slice(emac);
-	if (slice < 0)
-		return slice;
-
-	/* To differentiate channels for SLICE0 vs SLICE1 */
-	snprintf(rx_chn->name, sizeof(rx_chn->name), "%s%d", name, slice);
-
-	hdesc_size = cppi5_hdesc_calc_size(true, PRUETH_NAV_PS_DATA_SIZE,
-					   PRUETH_NAV_SW_DATA_SIZE);
-	memset(&rx_cfg, 0, sizeof(rx_cfg));
-	rx_cfg.swdata_size = PRUETH_NAV_SW_DATA_SIZE;
-	rx_cfg.flow_id_num = max_rflows;
-	rx_cfg.flow_id_base = -1; /* udmax will auto select flow id base */
-
-	/* init all flows */
-	rx_chn->dev = dev;
-	rx_chn->descs_num = max_desc_num;
-
-	rx_chn->rx_chn = k3_udma_glue_request_rx_chn(dev, rx_chn->name,
-						     &rx_cfg);
-	if (IS_ERR(rx_chn->rx_chn)) {
-		ret = PTR_ERR(rx_chn->rx_chn);
-		rx_chn->rx_chn = NULL;
-		netdev_err(ndev, "Failed to request rx dma ch: %d\n", ret);
-		goto fail;
-	}
-
-	rx_chn->dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn->rx_chn);
-	rx_chn->desc_pool = k3_cppi_desc_pool_create_name(rx_chn->dma_dev,
-							  rx_chn->descs_num,
-							  hdesc_size,
-							  rx_chn->name);
-	if (IS_ERR(rx_chn->desc_pool)) {
-		ret = PTR_ERR(rx_chn->desc_pool);
-		rx_chn->desc_pool = NULL;
-		netdev_err(ndev, "Failed to create rx pool: %d\n", ret);
-		goto fail;
-	}
-
-	emac->rx_flow_id_base = k3_udma_glue_rx_get_flow_id_base(rx_chn->rx_chn);
-	netdev_dbg(ndev, "flow id base = %d\n", emac->rx_flow_id_base);
-
-	fdqring_id = K3_RINGACC_RING_ID_ANY;
-	for (i = 0; i < rx_cfg.flow_id_num; i++) {
-		struct k3_ring_cfg rxring_cfg = {
-			.elm_size = K3_RINGACC_RING_ELSIZE_8,
-			.mode = K3_RINGACC_RING_MODE_RING,
-			.flags = 0,
-		};
-		struct k3_ring_cfg fdqring_cfg = {
-			.elm_size = K3_RINGACC_RING_ELSIZE_8,
-			.flags = K3_RINGACC_RING_SHARED,
-		};
-		struct k3_udma_glue_rx_flow_cfg rx_flow_cfg = {
-			.rx_cfg = rxring_cfg,
-			.rxfdq_cfg = fdqring_cfg,
-			.ring_rxq_id = K3_RINGACC_RING_ID_ANY,
-			.src_tag_lo_sel =
-				K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG,
-		};
-
-		rx_flow_cfg.ring_rxfdq0_id = fdqring_id;
-		rx_flow_cfg.rx_cfg.size = max_desc_num;
-		rx_flow_cfg.rxfdq_cfg.size = max_desc_num;
-		rx_flow_cfg.rxfdq_cfg.mode = emac->prueth->pdata.fdqring_mode;
-
-		ret = k3_udma_glue_rx_flow_init(rx_chn->rx_chn,
-						i, &rx_flow_cfg);
-		if (ret) {
-			netdev_err(ndev, "Failed to init rx flow%d %d\n",
-				   i, ret);
-			goto fail;
-		}
-		if (!i)
-			fdqring_id = k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn,
-								     i);
-		rx_chn->irq[i] = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i);
-		if (rx_chn->irq[i] <= 0) {
-			ret = rx_chn->irq[i];
-			netdev_err(ndev, "Failed to get rx dma irq");
-			goto fail;
-		}
-	}
-
-	return 0;
-
-fail:
-	prueth_cleanup_rx_chns(emac, rx_chn, max_rflows);
-	return ret;
-}
-
-static int prueth_dma_rx_push(struct prueth_emac *emac,
-			      struct sk_buff *skb,
-			      struct prueth_rx_chn *rx_chn)
-{
-	struct net_device *ndev = emac->ndev;
-	struct cppi5_host_desc_t *desc_rx;
-	u32 pkt_len = skb_tailroom(skb);
-	dma_addr_t desc_dma;
-	dma_addr_t buf_dma;
-	void **swdata;
-
-	desc_rx = k3_cppi_desc_pool_alloc(rx_chn->desc_pool);
-	if (!desc_rx) {
-		netdev_err(ndev, "rx push: failed to allocate descriptor\n");
-		return -ENOMEM;
-	}
-	desc_dma = k3_cppi_desc_pool_virt2dma(rx_chn->desc_pool, desc_rx);
-
-	buf_dma = dma_map_single(rx_chn->dma_dev, skb->data, pkt_len, DMA_FROM_DEVICE);
-	if (unlikely(dma_mapping_error(rx_chn->dma_dev, buf_dma))) {
-		k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
-		netdev_err(ndev, "rx push: failed to map rx pkt buffer\n");
-		return -EINVAL;
-	}
-
-	cppi5_hdesc_init(desc_rx, CPPI5_INFO0_HDESC_EPIB_PRESENT,
-			 PRUETH_NAV_PS_DATA_SIZE);
-	k3_udma_glue_rx_dma_to_cppi5_addr(rx_chn->rx_chn, &buf_dma);
-	cppi5_hdesc_attach_buf(desc_rx, buf_dma, skb_tailroom(skb), buf_dma, skb_tailroom(skb));
-
-	swdata = cppi5_hdesc_get_swdata(desc_rx);
-	*swdata = skb;
-
-	return k3_udma_glue_push_rx_chn(rx_chn->rx_chn, 0,
-					desc_rx, desc_dma);
-}
-
-static u64 icssg_ts_to_ns(u32 hi_sw, u32 hi, u32 lo, u32 cycle_time_ns)
-{
-	u32 iepcount_lo, iepcount_hi, hi_rollover_count;
-	u64 ns;
-
-	iepcount_lo = lo & GENMASK(19, 0);
-	iepcount_hi = (hi & GENMASK(11, 0)) << 12 | lo >> 20;
-	hi_rollover_count = hi >> 11;
-
-	ns = ((u64)hi_rollover_count) << 23 | (iepcount_hi + hi_sw);
-	ns = ns * cycle_time_ns + iepcount_lo;
-
-	return ns;
-}
-
-static void emac_rx_timestamp(struct prueth_emac *emac,
-			      struct sk_buff *skb, u32 *psdata)
-{
-	struct skb_shared_hwtstamps *ssh;
-	u64 ns;
-
-	u32 hi_sw = readl(emac->prueth->shram.va +
-			  TIMESYNC_FW_WC_COUNT_HI_SW_OFFSET_OFFSET);
-	ns = icssg_ts_to_ns(hi_sw, psdata[1], psdata[0],
-			    IEP_DEFAULT_CYCLE_TIME_NS);
-
-	ssh = skb_hwtstamps(skb);
-	memset(ssh, 0, sizeof(*ssh));
-	ssh->hwtstamp = ns_to_ktime(ns);
-}
-
-static int emac_rx_packet(struct prueth_emac *emac, u32 flow_id)
-{
-	struct prueth_rx_chn *rx_chn = &emac->rx_chns;
-	u32 buf_dma_len, pkt_len, port_id = 0;
-	struct net_device *ndev = emac->ndev;
-	struct cppi5_host_desc_t *desc_rx;
-	struct sk_buff *skb, *new_skb;
-	dma_addr_t desc_dma, buf_dma;
-	void **swdata;
-	u32 *psdata;
-	int ret;
-
-	ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_id, &desc_dma);
-	if (ret) {
-		if (ret != -ENODATA)
-			netdev_err(ndev, "rx pop: failed: %d\n", ret);
-		return ret;
-	}
-
-	if (cppi5_desc_is_tdcm(desc_dma)) /* Teardown ? */
-		return 0;
-
-	desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
-
-	swdata = cppi5_hdesc_get_swdata(desc_rx);
-	skb = *swdata;
-
-	psdata = cppi5_hdesc_get_psdata(desc_rx);
-	/* RX HW timestamp */
-	if (emac->rx_ts_enabled)
-		emac_rx_timestamp(emac, skb, psdata);
-
-	cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
-	k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
-	pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
-	/* firmware adds 4 CRC bytes, strip them */
-	pkt_len -= 4;
-	cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
-
-	dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
-	k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
-
-	skb->dev = ndev;
-	new_skb = netdev_alloc_skb_ip_align(ndev, PRUETH_MAX_PKT_SIZE);
-	/* if allocation fails we drop the packet but push the
-	 * descriptor back to the ring with old skb to prevent a stall
-	 */
-	if (!new_skb) {
-		ndev->stats.rx_dropped++;
-		new_skb = skb;
-	} else {
-		/* send the filled skb up the n/w stack */
-		skb_put(skb, pkt_len);
-		skb->protocol = eth_type_trans(skb, ndev);
-		napi_gro_receive(&emac->napi_rx, skb);
-		ndev->stats.rx_bytes += pkt_len;
-		ndev->stats.rx_packets++;
-	}
-
-	/* queue another RX DMA */
-	ret = prueth_dma_rx_push(emac, new_skb, &emac->rx_chns);
-	if (WARN_ON(ret < 0)) {
-		dev_kfree_skb_any(new_skb);
-		ndev->stats.rx_errors++;
-		ndev->stats.rx_dropped++;
-	}
-
-	return ret;
-}
-
-static void prueth_rx_cleanup(void *data, dma_addr_t desc_dma)
-{
-	struct prueth_rx_chn *rx_chn = data;
-	struct cppi5_host_desc_t *desc_rx;
-	struct sk_buff *skb;
-	dma_addr_t buf_dma;
-	u32 buf_dma_len;
-	void **swdata;
-
-	desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
-	swdata = cppi5_hdesc_get_swdata(desc_rx);
-	skb = *swdata;
-	cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
-	k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
-
-	dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len,
-			 DMA_FROM_DEVICE);
-	k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
-
-	dev_kfree_skb_any(skb);
-}
-
 static int emac_get_tx_ts(struct prueth_emac *emac,
 			  struct emac_tx_ts_response *rsp)
 {
@@ -661,208 +102,6 @@ static void tx_ts_work(struct prueth_emac *emac)
 	}
 }
 
-static int prueth_tx_ts_cookie_get(struct prueth_emac *emac)
-{
-	int i;
-
-	/* search and get the next free slot */
-	for (i = 0; i < PRUETH_MAX_TX_TS_REQUESTS; i++) {
-		if (!emac->tx_ts_skb[i]) {
-			emac->tx_ts_skb[i] = ERR_PTR(-EBUSY); /* reserve slot */
-			return i;
-		}
-	}
-
-	return -EBUSY;
-}
-
-/**
- * emac_ndo_start_xmit - EMAC Transmit function
- * @skb: SKB pointer
- * @ndev: EMAC network adapter
- *
- * Called by the system to transmit a packet  - we queue the packet in
- * EMAC hardware transmit queue
- * Doesn't wait for completion we'll check for TX completion in
- * emac_tx_complete_packets().
- *
- * Return: enum netdev_tx
- */
-static enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev)
-{
-	struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc;
-	struct prueth_emac *emac = netdev_priv(ndev);
-	struct netdev_queue *netif_txq;
-	struct prueth_tx_chn *tx_chn;
-	dma_addr_t desc_dma, buf_dma;
-	int i, ret = 0, q_idx;
-	bool in_tx_ts = 0;
-	int tx_ts_cookie;
-	void **swdata;
-	u32 pkt_len;
-	u32 *epib;
-
-	pkt_len = skb_headlen(skb);
-	q_idx = skb_get_queue_mapping(skb);
-
-	tx_chn = &emac->tx_chns[q_idx];
-	netif_txq = netdev_get_tx_queue(ndev, q_idx);
-
-	/* Map the linear buffer */
-	buf_dma = dma_map_single(tx_chn->dma_dev, skb->data, pkt_len, DMA_TO_DEVICE);
-	if (dma_mapping_error(tx_chn->dma_dev, buf_dma)) {
-		netdev_err(ndev, "tx: failed to map skb buffer\n");
-		ret = NETDEV_TX_OK;
-		goto drop_free_skb;
-	}
-
-	first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
-	if (!first_desc) {
-		netdev_dbg(ndev, "tx: failed to allocate descriptor\n");
-		dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len, DMA_TO_DEVICE);
-		goto drop_stop_q_busy;
-	}
-
-	cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT,
-			 PRUETH_NAV_PS_DATA_SIZE);
-	cppi5_hdesc_set_pkttype(first_desc, 0);
-	epib = first_desc->epib;
-	epib[0] = 0;
-	epib[1] = 0;
-	if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
-	    emac->tx_ts_enabled) {
-		tx_ts_cookie = prueth_tx_ts_cookie_get(emac);
-		if (tx_ts_cookie >= 0) {
-			skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
-			/* Request TX timestamp */
-			epib[0] = (u32)tx_ts_cookie;
-			epib[1] = 0x80000000;	/* TX TS request */
-			emac->tx_ts_skb[tx_ts_cookie] = skb_get(skb);
-			in_tx_ts = 1;
-		}
-	}
-
-	/* set dst tag to indicate internal qid at the firmware which is at
-	 * bit8..bit15. bit0..bit7 indicates port num for directed
-	 * packets in case of switch mode operation
-	 */
-	cppi5_desc_set_tags_ids(&first_desc->hdr, 0, (emac->port_id | (q_idx << 8)));
-	k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
-	cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
-	swdata = cppi5_hdesc_get_swdata(first_desc);
-	*swdata = skb;
-
-	/* Handle the case where skb is fragmented in pages */
-	cur_desc = first_desc;
-	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
-		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-		u32 frag_size = skb_frag_size(frag);
-
-		next_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
-		if (!next_desc) {
-			netdev_err(ndev,
-				   "tx: failed to allocate frag. descriptor\n");
-			goto free_desc_stop_q_busy_cleanup_tx_ts;
-		}
-
-		buf_dma = skb_frag_dma_map(tx_chn->dma_dev, frag, 0, frag_size,
-					   DMA_TO_DEVICE);
-		if (dma_mapping_error(tx_chn->dma_dev, buf_dma)) {
-			netdev_err(ndev, "tx: Failed to map skb page\n");
-			k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
-			ret = NETDEV_TX_OK;
-			goto cleanup_tx_ts;
-		}
-
-		cppi5_hdesc_reset_hbdesc(next_desc);
-		k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
-		cppi5_hdesc_attach_buf(next_desc,
-				       buf_dma, frag_size, buf_dma, frag_size);
-
-		desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool,
-						      next_desc);
-		k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &desc_dma);
-		cppi5_hdesc_link_hbdesc(cur_desc, desc_dma);
-
-		pkt_len += frag_size;
-		cur_desc = next_desc;
-	}
-	WARN_ON_ONCE(pkt_len != skb->len);
-
-	/* report bql before sending packet */
-	netdev_tx_sent_queue(netif_txq, pkt_len);
-
-	cppi5_hdesc_set_pktlen(first_desc, pkt_len);
-	desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc);
-	/* cppi5_desc_dump(first_desc, 64); */
-
-	skb_tx_timestamp(skb);  /* SW timestamp if SKBTX_IN_PROGRESS not set */
-	ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
-	if (ret) {
-		netdev_err(ndev, "tx: push failed: %d\n", ret);
-		goto drop_free_descs;
-	}
-
-	if (in_tx_ts)
-		atomic_inc(&emac->tx_ts_pending);
-
-	if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) < MAX_SKB_FRAGS) {
-		netif_tx_stop_queue(netif_txq);
-		/* Barrier, so that stop_queue visible to other cpus */
-		smp_mb__after_atomic();
-
-		if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
-		    MAX_SKB_FRAGS)
-			netif_tx_wake_queue(netif_txq);
-	}
-
-	return NETDEV_TX_OK;
-
-cleanup_tx_ts:
-	if (in_tx_ts) {
-		dev_kfree_skb_any(emac->tx_ts_skb[tx_ts_cookie]);
-		emac->tx_ts_skb[tx_ts_cookie] = NULL;
-	}
-
-drop_free_descs:
-	prueth_xmit_free(tx_chn, first_desc);
-
-drop_free_skb:
-	dev_kfree_skb_any(skb);
-
-	/* error */
-	ndev->stats.tx_dropped++;
-	netdev_err(ndev, "tx: error: %d\n", ret);
-
-	return ret;
-
-free_desc_stop_q_busy_cleanup_tx_ts:
-	if (in_tx_ts) {
-		dev_kfree_skb_any(emac->tx_ts_skb[tx_ts_cookie]);
-		emac->tx_ts_skb[tx_ts_cookie] = NULL;
-	}
-	prueth_xmit_free(tx_chn, first_desc);
-
-drop_stop_q_busy:
-	netif_tx_stop_queue(netif_txq);
-	return NETDEV_TX_BUSY;
-}
-
-static void prueth_tx_cleanup(void *data, dma_addr_t desc_dma)
-{
-	struct prueth_tx_chn *tx_chn = data;
-	struct cppi5_host_desc_t *desc_tx;
-	struct sk_buff *skb;
-	void **swdata;
-
-	desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma);
-	swdata = cppi5_hdesc_get_swdata(desc_tx);
-	skb = *(swdata);
-	prueth_xmit_free(tx_chn, desc_tx);
-
-	dev_kfree_skb_any(skb);
-}
-
 static irqreturn_t prueth_tx_ts_irq(int irq, void *dev_id)
 {
 	struct prueth_emac *emac = dev_id;
@@ -873,22 +112,6 @@ static irqreturn_t prueth_tx_ts_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t prueth_rx_irq(int irq, void *dev_id)
-{
-	struct prueth_emac *emac = dev_id;
-
-	disable_irq_nosync(irq);
-	napi_schedule(&emac->napi_rx);
-
-	return IRQ_HANDLED;
-}
-
-struct icssg_firmwares {
-	char *pru;
-	char *rtu;
-	char *txpru;
-};
-
 static struct icssg_firmwares icssg_emac_firmwares[] = {
 	{
 		.pru = "ti-pruss/am65x-sr2-pru0-prueth-fw.elf",
@@ -953,41 +176,6 @@ static int prueth_emac_start(struct prueth *prueth, struct prueth_emac *emac)
 	return ret;
 }
 
-static void prueth_emac_stop(struct prueth_emac *emac)
-{
-	struct prueth *prueth = emac->prueth;
-	int slice;
-
-	switch (emac->port_id) {
-	case PRUETH_PORT_MII0:
-		slice = ICSS_SLICE0;
-		break;
-	case PRUETH_PORT_MII1:
-		slice = ICSS_SLICE1;
-		break;
-	default:
-		netdev_err(emac->ndev, "invalid port\n");
-		return;
-	}
-
-	emac->fw_running = 0;
-	rproc_shutdown(prueth->txpru[slice]);
-	rproc_shutdown(prueth->rtu[slice]);
-	rproc_shutdown(prueth->pru[slice]);
-}
-
-static void prueth_cleanup_tx_ts(struct prueth_emac *emac)
-{
-	int i;
-
-	for (i = 0; i < PRUETH_MAX_TX_TS_REQUESTS; i++) {
-		if (emac->tx_ts_skb[i]) {
-			dev_kfree_skb_any(emac->tx_ts_skb[i]);
-			emac->tx_ts_skb[i] = NULL;
-		}
-	}
-}
-
 /* called back by PHY layer if there is change in link state of hw port*/
 static void emac_adjust_link(struct net_device *ndev)
 {
@@ -1055,86 +243,6 @@ static void emac_adjust_link(struct net_device *ndev)
 	}
 }
 
-static int emac_napi_rx_poll(struct napi_struct *napi_rx, int budget)
-{
-	struct prueth_emac *emac = prueth_napi_to_emac(napi_rx);
-	int rx_flow = PRUETH_RX_FLOW_DATA;
-	int flow = PRUETH_MAX_RX_FLOWS;
-	int num_rx = 0;
-	int cur_budget;
-	int ret;
-
-	while (flow--) {
-		cur_budget = budget - num_rx;
-
-		while (cur_budget--) {
-			ret = emac_rx_packet(emac, flow);
-			if (ret)
-				break;
-			num_rx++;
-		}
-
-		if (num_rx >= budget)
-			break;
-	}
-
-	if (num_rx < budget && napi_complete_done(napi_rx, num_rx))
-		enable_irq(emac->rx_chns.irq[rx_flow]);
-
-	return num_rx;
-}
-
-static int prueth_prepare_rx_chan(struct prueth_emac *emac,
-				  struct prueth_rx_chn *chn,
-				  int buf_size)
-{
-	struct sk_buff *skb;
-	int i, ret;
-
-	for (i = 0; i < chn->descs_num; i++) {
-		skb = __netdev_alloc_skb_ip_align(NULL, buf_size, GFP_KERNEL);
-		if (!skb)
-			return -ENOMEM;
-
-		ret = prueth_dma_rx_push(emac, skb, chn);
-		if (ret < 0) {
-			netdev_err(emac->ndev,
-				   "cannot submit skb for rx chan %s ret %d\n",
-				   chn->name, ret);
-			kfree_skb(skb);
-			return ret;
-		}
-	}
-
-	return 0;
-}
-
-static void prueth_reset_tx_chan(struct prueth_emac *emac, int ch_num,
-				 bool free_skb)
-{
-	int i;
-
-	for (i = 0; i < ch_num; i++) {
-		if (free_skb)
-			k3_udma_glue_reset_tx_chn(emac->tx_chns[i].tx_chn,
-						  &emac->tx_chns[i],
-						  prueth_tx_cleanup);
-		k3_udma_glue_disable_tx_chn(emac->tx_chns[i].tx_chn);
-	}
-}
-
-static void prueth_reset_rx_chan(struct prueth_rx_chn *chn,
-				 int num_flows, bool disable)
-{
-	int i;
-
-	for (i = 0; i < num_flows; i++)
-		k3_udma_glue_reset_rx_chn(chn->rx_chn, i, chn,
-					  prueth_rx_cleanup, !!i);
-	if (disable)
-		k3_udma_glue_disable_rx_chn(chn->rx_chn);
-}
-
 static int emac_phy_connect(struct prueth_emac *emac)
 {
 	struct prueth *prueth = emac->prueth;
@@ -1508,11 +616,6 @@ static int emac_ndo_stop(struct net_device *ndev)
 	return 0;
 }
 
-static void emac_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue)
-{
-	ndev->stats.tx_errors++;
-}
-
 static void emac_ndo_set_rx_mode_work(struct work_struct *work)
 {
 	struct prueth_emac *emac = container_of(work, struct prueth_emac, rx_mode_work);
@@ -1558,116 +661,6 @@ static void emac_ndo_set_rx_mode(struct net_device *ndev)
 	queue_work(emac->cmd_wq, &emac->rx_mode_work);
 }
 
-static int emac_set_ts_config(struct net_device *ndev, struct ifreq *ifr)
-{
-	struct prueth_emac *emac = netdev_priv(ndev);
-	struct hwtstamp_config config;
-
-	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
-		return -EFAULT;
-
-	switch (config.tx_type) {
-	case HWTSTAMP_TX_OFF:
-		emac->tx_ts_enabled = 0;
-		break;
-	case HWTSTAMP_TX_ON:
-		emac->tx_ts_enabled = 1;
-		break;
-	default:
-		return -ERANGE;
-	}
-
-	switch (config.rx_filter) {
-	case HWTSTAMP_FILTER_NONE:
-		emac->rx_ts_enabled = 0;
-		break;
-	case HWTSTAMP_FILTER_ALL:
-	case HWTSTAMP_FILTER_SOME:
-	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
-	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
-	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
-	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
-	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
-	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
-	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
-	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
-	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
-	case HWTSTAMP_FILTER_PTP_V2_EVENT:
-	case HWTSTAMP_FILTER_PTP_V2_SYNC:
-	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
-	case HWTSTAMP_FILTER_NTP_ALL:
-		emac->rx_ts_enabled = 1;
-		config.rx_filter = HWTSTAMP_FILTER_ALL;
-		break;
-	default:
-		return -ERANGE;
-	}
-
-	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
-		-EFAULT : 0;
-}
-
-static int emac_get_ts_config(struct net_device *ndev, struct ifreq *ifr)
-{
-	struct prueth_emac *emac = netdev_priv(ndev);
-	struct hwtstamp_config config;
-
-	config.flags = 0;
-	config.tx_type = emac->tx_ts_enabled ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
-	config.rx_filter = emac->rx_ts_enabled ? HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
-
-	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
-			    -EFAULT : 0;
-}
-
-static int emac_ndo_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
-{
-	switch (cmd) {
-	case SIOCGHWTSTAMP:
-		return emac_get_ts_config(ndev, ifr);
-	case SIOCSHWTSTAMP:
-		return emac_set_ts_config(ndev, ifr);
-	default:
-		break;
-	}
-
-	return phy_do_ioctl(ndev, ifr, cmd);
-}
-
-static void emac_ndo_get_stats64(struct net_device *ndev,
-				 struct rtnl_link_stats64 *stats)
-{
-	struct prueth_emac *emac = netdev_priv(ndev);
-
-	emac_update_hardware_stats(emac);
-
-	stats->rx_packets     = emac_get_stat_by_name(emac, "rx_packets");
-	stats->rx_bytes       = emac_get_stat_by_name(emac, "rx_bytes");
-	stats->tx_packets     = emac_get_stat_by_name(emac, "tx_packets");
-	stats->tx_bytes       = emac_get_stat_by_name(emac, "tx_bytes");
-	stats->rx_crc_errors  = emac_get_stat_by_name(emac, "rx_crc_errors");
-	stats->rx_over_errors = emac_get_stat_by_name(emac, "rx_over_errors");
-	stats->multicast      = emac_get_stat_by_name(emac, "rx_multicast_frames");
-
-	stats->rx_errors  = ndev->stats.rx_errors;
-	stats->rx_dropped = ndev->stats.rx_dropped;
-	stats->tx_errors  = ndev->stats.tx_errors;
-	stats->tx_dropped = ndev->stats.tx_dropped;
-}
-
-static int emac_ndo_get_phys_port_name(struct net_device *ndev, char *name,
-				       size_t len)
-{
-	struct prueth_emac *emac = netdev_priv(ndev);
-	int ret;
-
-	ret = snprintf(name, len, "p%d", emac->port_id);
-	if (ret >= len)
-		return -EINVAL;
-
-	return 0;
-}
-
 static const struct net_device_ops emac_netdev_ops = {
 	.ndo_open = emac_ndo_open,
 	.ndo_stop = emac_ndo_stop,
@@ -1681,42 +674,6 @@ static const struct net_device_ops emac_netdev_ops = {
 	.ndo_get_phys_port_name = emac_ndo_get_phys_port_name,
 };
 
-/* get emac_port corresponding to eth_node name */
-static int prueth_node_port(struct device_node *eth_node)
-{
-	u32 port_id;
-	int ret;
-
-	ret = of_property_read_u32(eth_node, "reg", &port_id);
-	if (ret)
-		return ret;
-
-	if (port_id == 0)
-		return PRUETH_PORT_MII0;
-	else if (port_id == 1)
-		return PRUETH_PORT_MII1;
-	else
-		return PRUETH_PORT_INVALID;
-}
-
-/* get MAC instance corresponding to eth_node name */
-static int prueth_node_mac(struct device_node *eth_node)
-{
-	u32 port_id;
-	int ret;
-
-	ret = of_property_read_u32(eth_node, "reg", &port_id);
-	if (ret)
-		return ret;
-
-	if (port_id == 0)
-		return PRUETH_MAC0;
-	else if (port_id == 1)
-		return PRUETH_MAC1;
-	else
-		return PRUETH_MAC_INVALID;
-}
-
 static int prueth_netdev_init(struct prueth *prueth,
 			      struct device_node *eth_node)
 {
@@ -1860,90 +817,6 @@ static int prueth_netdev_init(struct prueth *prueth,
 	return ret;
 }
 
-static void prueth_netdev_exit(struct prueth *prueth,
-			       struct device_node *eth_node)
-{
-	struct prueth_emac *emac;
-	enum prueth_mac mac;
-
-	mac = prueth_node_mac(eth_node);
-	if (mac == PRUETH_MAC_INVALID)
-		return;
-
-	emac = prueth->emac[mac];
-	if (!emac)
-		return;
-
-	if (of_phy_is_fixed_link(emac->phy_node))
-		of_phy_deregister_fixed_link(emac->phy_node);
-
-	netif_napi_del(&emac->napi_rx);
-
-	pruss_release_mem_region(prueth->pruss, &emac->dram);
-	destroy_workqueue(emac->cmd_wq);
-	free_netdev(emac->ndev);
-	prueth->emac[mac] = NULL;
-}
-
-static int prueth_get_cores(struct prueth *prueth, int slice)
-{
-	struct device *dev = prueth->dev;
-	enum pruss_pru_id pruss_id;
-	struct device_node *np;
-	int idx = -1, ret;
-
-	np = dev->of_node;
-
-	switch (slice) {
-	case ICSS_SLICE0:
-		idx = 0;
-		break;
-	case ICSS_SLICE1:
-		idx = 3;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	prueth->pru[slice] = pru_rproc_get(np, idx, &pruss_id);
-	if (IS_ERR(prueth->pru[slice])) {
-		ret = PTR_ERR(prueth->pru[slice]);
-		prueth->pru[slice] = NULL;
-		return dev_err_probe(dev, ret, "unable to get PRU%d\n", slice);
-	}
-	prueth->pru_id[slice] = pruss_id;
-
-	idx++;
-	prueth->rtu[slice] = pru_rproc_get(np, idx, NULL);
-	if (IS_ERR(prueth->rtu[slice])) {
-		ret = PTR_ERR(prueth->rtu[slice]);
-		prueth->rtu[slice] = NULL;
-		return dev_err_probe(dev, ret, "unable to get RTU%d\n", slice);
-	}
-
-	idx++;
-	prueth->txpru[slice] = pru_rproc_get(np, idx, NULL);
-	if (IS_ERR(prueth->txpru[slice])) {
-		ret = PTR_ERR(prueth->txpru[slice]);
-		prueth->txpru[slice] = NULL;
-		return dev_err_probe(dev, ret, "unable to get TX_PRU%d\n", slice);
-	}
-
-	return 0;
-}
-
-static void prueth_put_cores(struct prueth *prueth, int slice)
-{
-	if (prueth->txpru[slice])
-		pru_rproc_put(prueth->txpru[slice]);
-
-	if (prueth->rtu[slice])
-		pru_rproc_put(prueth->rtu[slice]);
-
-	if (prueth->pru[slice])
-		pru_rproc_put(prueth->pru[slice]);
-}
-
 static int prueth_probe(struct platform_device *pdev)
 {
 	struct device_node *eth_node, *eth_ports_node;
@@ -2273,62 +1146,6 @@ static void prueth_remove(struct platform_device *pdev)
 		prueth_put_cores(prueth, ICSS_SLICE0);
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int prueth_suspend(struct device *dev)
-{
-	struct prueth *prueth = dev_get_drvdata(dev);
-	struct net_device *ndev;
-	int i, ret;
-
-	for (i = 0; i < PRUETH_NUM_MACS; i++) {
-		ndev = prueth->registered_netdevs[i];
-
-		if (!ndev)
-			continue;
-
-		if (netif_running(ndev)) {
-			netif_device_detach(ndev);
-			ret = emac_ndo_stop(ndev);
-			if (ret < 0) {
-				netdev_err(ndev, "failed to stop: %d", ret);
-				return ret;
-			}
-		}
-	}
-
-	return 0;
-}
-
-static int prueth_resume(struct device *dev)
-{
-	struct prueth *prueth = dev_get_drvdata(dev);
-	struct net_device *ndev;
-	int i, ret;
-
-	for (i = 0; i < PRUETH_NUM_MACS; i++) {
-		ndev = prueth->registered_netdevs[i];
-
-		if (!ndev)
-			continue;
-
-		if (netif_running(ndev)) {
-			ret = emac_ndo_open(ndev);
-			if (ret < 0) {
-				netdev_err(ndev, "failed to start: %d", ret);
-				return ret;
-			}
-			netif_device_attach(ndev);
-		}
-	}
-
-	return 0;
-}
-#endif /* CONFIG_PM_SLEEP */
-
-static const struct dev_pm_ops prueth_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(prueth_suspend, prueth_resume)
-};
-
 static const struct prueth_pdata am654_icssg_pdata = {
 	.fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
 	.quirk_10m_link_issue = 1,
diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
index 8b6d6b497010..5d792e9bade0 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
@@ -55,6 +55,8 @@
 #define ICSSG_NUM_STANDARD_STATS 31
 #define ICSSG_NUM_ETHTOOL_STATS (ICSSG_NUM_STATS - ICSSG_NUM_STANDARD_STATS)
 
+#define IEP_DEFAULT_CYCLE_TIME_NS	1000000	/* 1 ms */
+
 /* Firmware status codes */
 #define ICSS_HS_FW_READY 0x55555555
 #define ICSS_HS_FW_DEAD 0xDEAD0000	/* lower 16 bits contain error code */
@@ -188,6 +190,12 @@ struct prueth_pdata {
 	u32	quirk_10m_link_issue:1;
 };
 
+struct icssg_firmwares {
+	char *pru;
+	char *rtu;
+	char *txpru;
+};
+
 /**
  * struct prueth - PRUeth structure
  * @dev: device
@@ -257,6 +265,7 @@ static inline int prueth_emac_slice(struct prueth_emac *emac)
 }
 
 extern const struct ethtool_ops icssg_ethtool_ops;
+extern const struct dev_pm_ops prueth_dev_pm_ops;
 
 /* Classifier helpers */
 void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac);
@@ -285,4 +294,54 @@ u32 icssg_queue_level(struct prueth *prueth, int queue);
 void emac_stats_work_handler(struct work_struct *work);
 void emac_update_hardware_stats(struct prueth_emac *emac);
 int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name);
+
+/* Common functions */
+void prueth_cleanup_rx_chns(struct prueth_emac *emac,
+			    struct prueth_rx_chn *rx_chn,
+			    int max_rflows);
+void prueth_cleanup_tx_chns(struct prueth_emac *emac);
+void prueth_ndev_del_tx_napi(struct prueth_emac *emac, int num);
+void prueth_xmit_free(struct prueth_tx_chn *tx_chn,
+		      struct cppi5_host_desc_t *desc);
+int emac_tx_complete_packets(struct prueth_emac *emac, int chn,
+			     int budget);
+int prueth_ndev_add_tx_napi(struct prueth_emac *emac);
+int prueth_init_tx_chns(struct prueth_emac *emac);
+int prueth_init_rx_chns(struct prueth_emac *emac,
+			struct prueth_rx_chn *rx_chn,
+			char *name, u32 max_rflows,
+			u32 max_desc_num);
+int prueth_dma_rx_push(struct prueth_emac *emac,
+		       struct sk_buff *skb,
+		       struct prueth_rx_chn *rx_chn);
+void emac_rx_timestamp(struct prueth_emac *emac,
+		       struct sk_buff *skb, u32 *psdata);
+enum netdev_tx emac_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev);
+irqreturn_t prueth_rx_irq(int irq, void *dev_id);
+void prueth_emac_stop(struct prueth_emac *emac);
+void prueth_cleanup_tx_ts(struct prueth_emac *emac);
+int emac_napi_rx_poll(struct napi_struct *napi_rx, int budget);
+int prueth_prepare_rx_chan(struct prueth_emac *emac,
+			   struct prueth_rx_chn *chn,
+			   int buf_size);
+void prueth_reset_tx_chan(struct prueth_emac *emac, int ch_num,
+			  bool free_skb);
+void prueth_reset_rx_chan(struct prueth_rx_chn *chn,
+			  int num_flows, bool disable);
+void emac_ndo_tx_timeout(struct net_device *ndev, unsigned int txqueue);
+int emac_ndo_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd);
+void emac_ndo_get_stats64(struct net_device *ndev,
+			  struct rtnl_link_stats64 *stats);
+int emac_ndo_get_phys_port_name(struct net_device *ndev, char *name,
+				size_t len);
+int prueth_node_port(struct device_node *eth_node);
+int prueth_node_mac(struct device_node *eth_node);
+void prueth_netdev_exit(struct prueth *prueth,
+			struct device_node *eth_node);
+int prueth_get_cores(struct prueth *prueth, int slice);
+void prueth_put_cores(struct prueth *prueth, int slice);
+
+/* Revision specific helper */
+u64 icssg_ts_to_ns(u32 hi_sw, u32 hi, u32 lo, u32 cycle_time_ns);
+
 #endif /* __NET_TI_ICSSG_PRUETH_H */
-- 
2.44.0