1 files changed, 831 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/net/octeontx2/nix.c b/roms/u-boot/drivers/net/octeontx2/nix.c
new file mode 100644
index 000000000..039c44b65
--- /dev/null
+++ b/roms/u-boot/drivers/net/octeontx2/nix.c
@@ -0,0 +1,831 @@
+// SPDX-License-Identifier:    GPL-2.0
+/*
+ * Copyright (C) 2018 Marvell International Ltd.
+ */
+
+#include <dm.h>
+#include <errno.h>
+#include <log.h>
+#include <malloc.h>
+#include <memalign.h>
+#include <misc.h>
+#include <net.h>
+#include <pci.h>
+#include <watchdog.h>
+
+#include <asm/arch/board.h>
+#include <asm/arch/csrs/csrs-lmt.h>
+#include <asm/io.h>
+#include <asm/types.h>
+
+#include <linux/delay.h>
+#include <linux/log2.h>
+#include <linux/types.h>
+
+#include "nix.h"
+#include "lmt.h"
+#include "cgx.h"
+
+/**
+ * NIX needs a lot of memory areas. Rather than handle all the failure cases,
+ * we'll use a wrapper around alloc that prints an error if a memory
+ * allocation fails.
+ *
+ * @param num_elements
+ *                  Number of elements to allocate
+ * @param elem_size Size of each element
+ * @param msg       Text string to show when allocation fails
+ *
+ * @return A valid memory location or NULL on failure
+ */
+static void *nix_memalloc(int num_elements, size_t elem_size, const char *msg)
+{
+	size_t alloc_size = num_elements * elem_size;
+	void *base = memalign(CONFIG_SYS_CACHELINE_SIZE, alloc_size);
+
+	if (!base)
+		printf("NIX: Mem alloc failed for %s (%d * %zu = %zu bytes)\n",
+		       msg ? msg : __func__, num_elements, elem_size,
+		       alloc_size);
+	else
+		memset(base, 0, alloc_size);
+
+	debug("NIX: Memory alloc for %s (%d * %zu = %zu bytes) at %p\n",
+	      msg ? msg : __func__, num_elements, elem_size, alloc_size, base);
+	return base;
+}
+
+int npc_lf_setup(struct nix *nix)
+{
+	int err;
+
+	err = npc_lf_admin_setup(nix);
+	if (err) {
+		printf("%s: Error setting up npc lf admin\n", __func__);
+		return err;
+	}
+
+	return 0;
+}
+
+static int npa_setup_pool(struct npa *npa, u32 pool_id,
+			  size_t buffer_size, u32 queue_length, void *buffers[])
+{
+	struct {
+		union npa_lf_aura_op_free0 f0;
+		union npa_lf_aura_op_free1 f1;
+	} aura_descr;
+	int index;
+
+	for (index = 0; index < queue_length; index++) {
+		buffers[index] = memalign(CONFIG_SYS_CACHELINE_SIZE,
+					  buffer_size);
+		if (!buffers[index]) {
+			printf("%s: Out of memory %d, size: %zu\n",
+			       __func__, index, buffer_size);
+			return -ENOMEM;
+		}
+		debug("%s: allocating buffer %d, addr %p size: %zu\n",
+		      __func__, index, buffers[index], buffer_size);
+
+		/* Add the newly obtained pointer to the pool.  128 bit
+		 * writes only.
+		 */
+		aura_descr.f0.s.addr = (u64)buffers[index];
+		aura_descr.f1.u = 0;
+		aura_descr.f1.s.aura = pool_id;
+		st128(npa->npa_base + NPA_LF_AURA_OP_FREE0(),
+		      aura_descr.f0.u, aura_descr.f1.u);
+	}
+
+	return 0;
+}
+
+int npa_lf_setup(struct nix *nix)
+{
+	struct rvu_pf *rvu = dev_get_priv(nix->dev);
+	struct nix_af *nix_af = nix->nix_af;
+	struct npa *npa;
+	union npa_af_const npa_af_const;
+	union npa_aura_s *aura;
+	union npa_pool_s *pool;
+	union rvu_func_addr_s block_addr;
+	int idx;
+	int stack_page_pointers;
+	int stack_page_bytes;
+	int err;
+
+	npa = (struct npa *)calloc(1, sizeof(struct npa));
+	if (!npa) {
+		printf("%s: out of memory for npa instance\n", __func__);
+		return -ENOMEM;
+	}
+	block_addr.u = 0;
+	block_addr.s.block = RVU_BLOCK_ADDR_E_NPA;
+	npa->npa_base = rvu->pf_base + block_addr.u;
+	npa->npa_af = nix_af->npa_af;
+	nix->npa = npa;
+
+	npa_af_const.u = npa_af_reg_read(npa->npa_af, NPA_AF_CONST());
+	stack_page_pointers = npa_af_const.s.stack_page_ptrs;
+	stack_page_bytes = npa_af_const.s.stack_page_bytes;
+
+	npa->stack_pages[NPA_POOL_RX] = (RQ_QLEN + stack_page_pointers - 1) /
+							stack_page_pointers;
+	npa->stack_pages[NPA_POOL_TX] = (SQ_QLEN + stack_page_pointers - 1) /
+							stack_page_pointers;
+	npa->stack_pages[NPA_POOL_SQB] = (SQB_QLEN + stack_page_pointers - 1) /
+							stack_page_pointers;
+	npa->pool_stack_pointers = stack_page_pointers;
+
+	npa->q_len[NPA_POOL_RX] = RQ_QLEN;
+	npa->q_len[NPA_POOL_TX] = SQ_QLEN;
+	npa->q_len[NPA_POOL_SQB] = SQB_QLEN;
+
+	npa->buf_size[NPA_POOL_RX] = MAX_MTU + CONFIG_SYS_CACHELINE_SIZE;
+	npa->buf_size[NPA_POOL_TX] = MAX_MTU + CONFIG_SYS_CACHELINE_SIZE;
+	npa->buf_size[NPA_POOL_SQB] = nix_af->sqb_size;
+
+	npa->aura_ctx = nix_memalloc(NPA_POOL_COUNT,
+				     sizeof(union npa_aura_s),
+				     "aura context");
+	if (!npa->aura_ctx) {
+		printf("%s: Out of memory for aura context\n", __func__);
+		return -ENOMEM;
+	}
+
+	for (idx = 0; idx < NPA_POOL_COUNT; idx++) {
+		npa->pool_ctx[idx] = nix_memalloc(1,
+						  sizeof(union npa_pool_s),
+						  "pool context");
+		if (!npa->pool_ctx[idx]) {
+			printf("%s: Out of memory for pool context\n",
+			       __func__);
+			return -ENOMEM;
+		}
+		npa->pool_stack[idx] = nix_memalloc(npa->stack_pages[idx],
+						    stack_page_bytes,
+						    "pool stack");
+		if (!npa->pool_stack[idx]) {
+			printf("%s: Out of memory for pool stack\n", __func__);
+			return -ENOMEM;
+		}
+	}
+
+	err = npa_lf_admin_setup(npa, nix->lf, (dma_addr_t)npa->aura_ctx);
+	if (err) {
+		printf("%s: Error setting up NPA LF admin for lf %d\n",
+		       __func__, nix->lf);
+		return err;
+	}
+
+	/* Set up the auras */
+	for (idx = 0; idx < NPA_POOL_COUNT; idx++) {
+		aura = npa->aura_ctx + (idx * sizeof(union npa_aura_s));
+		pool = npa->pool_ctx[idx];
+		debug("%s aura %p pool %p\n", __func__, aura, pool);
+		memset(aura, 0, sizeof(union npa_aura_s));
+		aura->s.fc_ena = 0;
+		aura->s.pool_addr = (u64)npa->pool_ctx[idx];
+		debug("%s aura.s.pool_addr %llx pool_addr %p\n", __func__,
+		      aura->s.pool_addr, npa->pool_ctx[idx]);
+		aura->s.shift = 64 - __builtin_clzll(npa->q_len[idx]) - 8;
+		aura->s.count = npa->q_len[idx];
+		aura->s.limit = npa->q_len[idx];
+		aura->s.ena = 1;
+		err = npa_attach_aura(nix_af, nix->lf, aura, idx);
+		if (err)
+			return err;
+
+		memset(pool, 0, sizeof(*pool));
+		pool->s.fc_ena = 0;
+		pool->s.nat_align = 1;
+		pool->s.stack_base = (u64)(npa->pool_stack[idx]);
+		debug("%s pool.s.stack_base %llx stack_base %p\n", __func__,
+		      pool->s.stack_base, npa->pool_stack[idx]);
+		pool->s.buf_size =
+			npa->buf_size[idx] / CONFIG_SYS_CACHELINE_SIZE;
+		pool->s.stack_max_pages = npa->stack_pages[idx];
+		pool->s.shift =
+			64 - __builtin_clzll(npa->pool_stack_pointers) - 8;
+		pool->s.ptr_start = 0;
+		pool->s.ptr_end = (1ULL << 40) -  1;
+		pool->s.ena = 1;
+		err = npa_attach_pool(nix_af, nix->lf, pool, idx);
+		if (err)
+			return err;
+	}
+
+	for (idx = 0; idx < NPA_POOL_COUNT; idx++) {
+		npa->buffers[idx] = nix_memalloc(npa->q_len[idx],
+						 sizeof(void *),
+						 "buffers");
+		if (!npa->buffers[idx]) {
+			printf("%s: Out of memory\n", __func__);
+			return -ENOMEM;
+		}
+	}
+
+	for (idx = 0; idx < NPA_POOL_COUNT; idx++) {
+		err = npa_setup_pool(npa, idx, npa->buf_size[idx],
+				     npa->q_len[idx], npa->buffers[idx]);
+		if (err) {
+			printf("%s: Error setting up pool %d\n",
+			       __func__, idx);
+			return err;
+		}
+	}
+	return 0;
+}
+
+int npa_lf_shutdown(struct nix *nix)
+{
+	struct npa *npa = nix->npa;
+	int err;
+	int pool;
+
+	err = npa_lf_admin_shutdown(nix->nix_af, nix->lf, NPA_POOL_COUNT);
+	if (err) {
+		printf("%s: Error %d shutting down NPA LF admin\n",
+		       __func__, err);
+		return err;
+	}
+	free(npa->aura_ctx);
+	npa->aura_ctx = NULL;
+
+	for (pool = 0; pool < NPA_POOL_COUNT; pool++) {
+		free(npa->pool_ctx[pool]);
+		npa->pool_ctx[pool] = NULL;
+		free(npa->pool_stack[pool]);
+		npa->pool_stack[pool] = NULL;
+		free(npa->buffers[pool]);
+		npa->buffers[pool] = NULL;
+	}
+
+	return 0;
+}
+
+int nix_lf_setup(struct nix *nix)
+{
+	struct nix_af *nix_af = nix->nix_af;
+	int idx;
+	int err = -1;
+
+	/* Alloc NIX RQ HW context memory */
+	nix->rq_ctx_base = nix_memalloc(nix->rq_cnt, nix_af->rq_ctx_sz,
+					"RQ CTX");
+	if (!nix->rq_ctx_base)
+		goto error;
+	memset(nix->rq_ctx_base, 0, nix_af->rq_ctx_sz);
+
+	/* Alloc NIX SQ HW context memory */
+	nix->sq_ctx_base = nix_memalloc(nix->sq_cnt, nix_af->sq_ctx_sz,
+					"SQ CTX");
+	if (!nix->sq_ctx_base)
+		goto error;
+	memset(nix->sq_ctx_base, 0, nix_af->sq_ctx_sz);
+
+	/* Alloc NIX CQ HW context memory */
+	nix->cq_ctx_base = nix_memalloc(nix->cq_cnt, nix_af->cq_ctx_sz,
+					"CQ CTX");
+	if (!nix->cq_ctx_base)
+		goto error;
+	memset(nix->cq_ctx_base, 0, nix_af->cq_ctx_sz * NIX_CQ_COUNT);
+	/* Alloc NIX CQ Ring memory */
+	for (idx = 0; idx < NIX_CQ_COUNT; idx++) {
+		err = qmem_alloc(&nix->cq[idx], CQ_ENTRIES, CQ_ENTRY_SIZE);
+		if (err)
+			goto error;
+	}
+
+	/* Alloc memory for Qints HW contexts */
+	nix->qint_base = nix_memalloc(nix_af->qints, nix_af->qint_ctx_sz,
+				      "Qint CTX");
+	if (!nix->qint_base)
+		goto error;
+	/* Alloc memory for CQints HW contexts */
+	nix->cint_base = nix_memalloc(nix_af->cints, nix_af->cint_ctx_sz,
+				      "Cint CTX");
+	if (!nix->cint_base)
+		goto error;
+	/* Alloc NIX RSS HW context memory and config the base */
+	nix->rss_base = nix_memalloc(nix->rss_grps, nix_af->rsse_ctx_sz,
+				     "RSS CTX");
+	if (!nix->rss_base)
+		goto error;
+
+	err = nix_lf_admin_setup(nix);
+	if (err) {
+		printf("%s: Error setting up LF\n", __func__);
+		goto error;
+	}
+
+	return 0;
+
+error:
+	if (nix->rq_ctx_base)
+		free(nix->rq_ctx_base);
+	nix->rq_ctx_base = NULL;
+	if (nix->rq_ctx_base)
+		free(nix->rq_ctx_base);
+	nix->rq_ctx_base = NULL;
+	if (nix->sq_ctx_base)
+		free(nix->sq_ctx_base);
+	nix->sq_ctx_base = NULL;
+	if (nix->cq_ctx_base)
+		free(nix->cq_ctx_base);
+	nix->cq_ctx_base = NULL;
+
+	for (idx = 0; idx < NIX_CQ_COUNT; idx++)
+		qmem_free(&nix->cq[idx]);
+
+	return err;
+}
+
+int nix_lf_shutdown(struct nix *nix)
+{
+	struct nix_af *nix_af = nix->nix_af;
+	int index;
+	int err;
+
+	err = nix_lf_admin_shutdown(nix_af, nix->lf, nix->cq_cnt,
+				    nix->rq_cnt, nix->sq_cnt);
+	if (err) {
+		printf("%s: Error shutting down LF admin\n", __func__);
+		return err;
+	}
+
+	if (nix->rq_ctx_base)
+		free(nix->rq_ctx_base);
+	nix->rq_ctx_base = NULL;
+	if (nix->rq_ctx_base)
+		free(nix->rq_ctx_base);
+	nix->rq_ctx_base = NULL;
+	if (nix->sq_ctx_base)
+		free(nix->sq_ctx_base);
+	nix->sq_ctx_base = NULL;
+	if (nix->cq_ctx_base)
+		free(nix->cq_ctx_base);
+	nix->cq_ctx_base = NULL;
+
+	for (index = 0; index < NIX_CQ_COUNT; index++)
+		qmem_free(&nix->cq[index]);
+
+	debug("%s: nix lf %d reset --\n", __func__, nix->lf);
+	return 0;
+}
+
+struct nix *nix_lf_alloc(struct udevice *dev)
+{
+	union rvu_func_addr_s block_addr;
+	struct nix *nix;
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct rvu_af *rvu_af = dev_get_priv(rvu->afdev);
+	union rvu_pf_func_s pf_func;
+	int err;
+
+	debug("%s(%s )\n", __func__, dev->name);
+
+	nix = (struct nix *)calloc(1, sizeof(*nix));
+	if (!nix) {
+		printf("%s: Out of memory for nix instance\n", __func__);
+		return NULL;
+	}
+	nix->nix_af = rvu_af->nix_af;
+
+	block_addr.u = 0;
+	block_addr.s.block = RVU_BLOCK_ADDR_E_NIXX(0);
+	nix->nix_base = rvu->pf_base + block_addr.u;
+	block_addr.u = 0;
+	block_addr.s.block = RVU_BLOCK_ADDR_E_NPC;
+	nix->npc_base = rvu->pf_base + block_addr.u;
+	block_addr.u = 0;
+	block_addr.s.block = RVU_BLOCK_ADDR_E_LMT;
+	nix->lmt_base = rvu->pf_base + block_addr.u;
+
+	pf_func.u = 0;
+	pf_func.s.pf = rvu->pfid;
+	nix->pf_func = pf_func.u;
+	nix->lf = rvu->nix_lfid;
+	nix->pf = rvu->pfid;
+	nix->dev = dev;
+	nix->sq_cnt = 1;
+	nix->rq_cnt = 1;
+	nix->rss_grps = 1;
+	nix->cq_cnt = 2;
+	nix->xqe_sz = NIX_CQE_SIZE_W16;
+
+	nix->lmac = nix_get_cgx_lmac(nix->pf);
+	if (!nix->lmac) {
+		printf("%s: Error: could not find lmac for pf %d\n",
+		       __func__, nix->pf);
+		free(nix);
+		return NULL;
+	}
+	nix->lmac->link_num =
+		NIX_LINK_E_CGXX_LMACX(nix->lmac->cgx->cgx_id,
+				      nix->lmac->lmac_id);
+	nix->lmac->chan_num =
+		NIX_CHAN_E_CGXX_LMACX_CHX(nix->lmac->cgx->cgx_id,
+					  nix->lmac->lmac_id, 0);
+	/* This is rx pkind in 1:1 mapping to NIX_LINK_E */
+	nix->lmac->pknd = nix->lmac->link_num;
+
+	cgx_lmac_set_pkind(nix->lmac, nix->lmac->lmac_id, nix->lmac->pknd);
+	debug("%s(%s CGX%x LMAC%x)\n", __func__, dev->name,
+	      nix->lmac->cgx->cgx_id, nix->lmac->lmac_id);
+	debug("%s(%s Link %x Chan %x Pknd %x)\n", __func__, dev->name,
+	      nix->lmac->link_num, nix->lmac->chan_num,	nix->lmac->pknd);
+
+	err = npa_lf_setup(nix);
+	if (err)
+		return NULL;
+
+	err = npc_lf_setup(nix);
+	if (err)
+		return NULL;
+
+	err = nix_lf_setup(nix);
+	if (err)
+		return NULL;
+
+	return nix;
+}
+
+u64 npa_aura_op_alloc(struct npa *npa, u64 aura_id)
+{
+	union npa_lf_aura_op_allocx op_allocx;
+
+	op_allocx.u = atomic_fetch_and_add64_nosync(npa->npa_base +
+			NPA_LF_AURA_OP_ALLOCX(0), aura_id);
+	return op_allocx.s.addr;
+}
+
+u64 nix_cq_op_status(struct nix *nix, u64 cq_id)
+{
+	union nixx_lf_cq_op_status op_status;
+	s64 *reg = nix->nix_base + NIXX_LF_CQ_OP_STATUS();
+
+	op_status.u = atomic_fetch_and_add64_nosync(reg, cq_id << 32);
+	return op_status.u;
+}
+
+/* TX */
+static inline void nix_write_lmt(struct nix *nix, void *buffer,
+				 int num_words)
+{
+	int i;
+
+	u64 *lmt_ptr = lmt_store_ptr(nix);
+	u64 *ptr = buffer;
+
+	debug("%s lmt_ptr %p %p\n", __func__, nix->lmt_base, lmt_ptr);
+	for (i = 0; i < num_words; i++) {
+		debug("%s data %llx lmt_ptr %p\n", __func__, ptr[i],
+		      lmt_ptr + i);
+		lmt_ptr[i] = ptr[i];
+	}
+}
+
+void nix_cqe_tx_pkt_handler(struct nix *nix, void *cqe)
+{
+	union nix_cqe_hdr_s *txcqe = (union nix_cqe_hdr_s *)cqe;
+
+	debug("%s: txcqe: %p\n", __func__, txcqe);
+
+	if (txcqe->s.cqe_type != NIX_XQE_TYPE_E_SEND) {
+		printf("%s: Error: Unsupported CQ header type %d\n",
+		       __func__, txcqe->s.cqe_type);
+		return;
+	}
+	nix_pf_reg_write(nix, NIXX_LF_CQ_OP_DOOR(),
+			 (NIX_CQ_TX << 32) | 1);
+}
+
+void nix_lf_flush_tx(struct udevice *dev)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+	union nixx_lf_cq_op_status op_status;
+	u32 head, tail;
+	void *cq_tx_base = nix->cq[NIX_CQ_TX].base;
+	union nix_cqe_hdr_s *cqe;
+
+	/* ack tx cqe entries */
+	op_status.u = nix_cq_op_status(nix, NIX_CQ_TX);
+	head = op_status.s.head;
+	tail = op_status.s.tail;
+	head &= (nix->cq[NIX_CQ_TX].qsize - 1);
+	tail &= (nix->cq[NIX_CQ_TX].qsize - 1);
+
+	debug("%s cq tx head %d tail %d\n", __func__, head, tail);
+	while (head != tail) {
+		cqe = cq_tx_base + head * nix->cq[NIX_CQ_TX].entry_sz;
+		nix_cqe_tx_pkt_handler(nix, cqe);
+		op_status.u = nix_cq_op_status(nix, NIX_CQ_TX);
+		head = op_status.s.head;
+		tail = op_status.s.tail;
+		head &= (nix->cq[NIX_CQ_TX].qsize - 1);
+		tail &= (nix->cq[NIX_CQ_TX].qsize - 1);
+		debug("%s cq tx head %d tail %d\n", __func__, head, tail);
+	}
+}
+
+int nix_lf_xmit(struct udevice *dev, void *pkt, int pkt_len)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+	struct nix_tx_dr tx_dr;
+	int dr_sz = (sizeof(struct nix_tx_dr) + 15) / 16 - 1;
+	s64 result;
+	void *packet;
+
+	nix_lf_flush_tx(dev);
+	memset((void *)&tx_dr, 0, sizeof(struct nix_tx_dr));
+	/* Dump TX packet in to NPA buffer */
+	packet = (void *)npa_aura_op_alloc(nix->npa, NPA_POOL_TX);
+	if (!packet) {
+		printf("%s TX buffers unavailable\n", __func__);
+		return -1;
+	}
+	memcpy(packet, pkt, pkt_len);
+	debug("%s TX buffer %p\n", __func__, packet);
+
+	tx_dr.hdr.s.aura = NPA_POOL_TX;
+	tx_dr.hdr.s.df = 0;
+	tx_dr.hdr.s.pnc = 1;
+	tx_dr.hdr.s.sq = 0;
+	tx_dr.hdr.s.total = pkt_len;
+	tx_dr.hdr.s.sizem1 = dr_sz - 2; /* FIXME - for now hdr+sg+sg1addr */
+	debug("%s dr_sz %d\n", __func__, dr_sz);
+
+	tx_dr.tx_sg.s.segs = 1;
+	tx_dr.tx_sg.s.subdc = NIX_SUBDC_E_SG;
+	tx_dr.tx_sg.s.seg1_size = pkt_len;
+	tx_dr.tx_sg.s.ld_type = NIX_SENDLDTYPE_E_LDT;
+	tx_dr.sg1_addr = (dma_addr_t)packet;
+
+#define DEBUG_PKT
+#ifdef DEBUG_PKT
+	debug("TX PKT Data\n");
+	for (int i = 0; i < pkt_len; i++) {
+		if (i && (i % 8 == 0))
+			debug("\n");
+		debug("%02x ", *((u8 *)pkt + i));
+	}
+	debug("\n");
+#endif
+	do {
+		nix_write_lmt(nix, &tx_dr, (dr_sz - 1) * 2);
+		__iowmb();
+		result = lmt_submit((u64)(nix->nix_base +
+					       NIXX_LF_OP_SENDX(0)));
+		WATCHDOG_RESET();
+	} while (result == 0);
+
+	return 0;
+}
+
+/* RX */
+void nix_lf_flush_rx(struct udevice *dev)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+	union nixx_lf_cq_op_status op_status;
+	void *cq_rx_base = nix->cq[NIX_CQ_RX].base;
+	struct nix_rx_dr *rx_dr;
+	union nix_rx_parse_s *rxparse;
+	u32 head, tail;
+	u32 rx_cqe_sz = nix->cq[NIX_CQ_RX].entry_sz;
+	u64 *seg;
+
+	/* flush rx cqe entries */
+	op_status.u = nix_cq_op_status(nix, NIX_CQ_RX);
+	head = op_status.s.head;
+	tail = op_status.s.tail;
+	head &= (nix->cq[NIX_CQ_RX].qsize - 1);
+	tail &= (nix->cq[NIX_CQ_RX].qsize - 1);
+
+	debug("%s cq rx head %d tail %d\n", __func__, head, tail);
+	while (head != tail) {
+		rx_dr = (struct nix_rx_dr *)cq_rx_base + head * rx_cqe_sz;
+		rxparse = &rx_dr->rx_parse;
+
+		debug("%s: rx parse: %p\n", __func__, rxparse);
+		debug("%s: rx parse: desc_sizem1 %x pkt_lenm1 %x\n",
+		      __func__, rxparse->s.desc_sizem1, rxparse->s.pkt_lenm1);
+
+		seg = (dma_addr_t *)(&rx_dr->rx_sg + 1);
+
+		st128(nix->npa->npa_base + NPA_LF_AURA_OP_FREE0(),
+		      seg[0], (1ULL << 63) | NPA_POOL_RX);
+
+		debug("%s return %llx to NPA\n", __func__, seg[0]);
+		nix_pf_reg_write(nix, NIXX_LF_CQ_OP_DOOR(),
+				 (NIX_CQ_RX << 32) | 1);
+
+		op_status.u = nix_cq_op_status(nix, NIX_CQ_RX);
+		head = op_status.s.head;
+		tail = op_status.s.tail;
+		head &= (nix->cq[NIX_CQ_RX].qsize - 1);
+		tail &= (nix->cq[NIX_CQ_RX].qsize - 1);
+		debug("%s cq rx head %d tail %d\n", __func__, head, tail);
+	}
+}
+
+int nix_lf_free_pkt(struct udevice *dev, uchar *pkt, int pkt_len)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+
+	/* Return rx packet to NPA */
+	debug("%s return %p to NPA\n", __func__, pkt);
+	st128(nix->npa->npa_base + NPA_LF_AURA_OP_FREE0(), (u64)pkt,
+	      (1ULL << 63) | NPA_POOL_RX);
+	nix_pf_reg_write(nix, NIXX_LF_CQ_OP_DOOR(),
+			 (NIX_CQ_RX << 32) | 1);
+
+	nix_lf_flush_tx(dev);
+	return 0;
+}
+
+int nix_lf_recv(struct udevice *dev, int flags, uchar **packetp)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+	union nixx_lf_cq_op_status op_status;
+	void *cq_rx_base = nix->cq[NIX_CQ_RX].base;
+	struct nix_rx_dr *rx_dr;
+	union nix_rx_parse_s *rxparse;
+	void *pkt, *cqe;
+	int pkt_len = 0;
+	u64 *addr;
+	u32 head, tail;
+
+	/* fetch rx cqe entries */
+	op_status.u = nix_cq_op_status(nix, NIX_CQ_RX);
+	head = op_status.s.head;
+	tail = op_status.s.tail;
+	head &= (nix->cq[NIX_CQ_RX].qsize - 1);
+	tail &= (nix->cq[NIX_CQ_RX].qsize - 1);
+	debug("%s cq rx head %d tail %d\n", __func__, head, tail);
+	if (head == tail)
+		return -EAGAIN;
+
+	debug("%s: rx_base %p head %d sz %d\n", __func__, cq_rx_base, head,
+	      nix->cq[NIX_CQ_RX].entry_sz);
+	cqe = cq_rx_base + head * nix->cq[NIX_CQ_RX].entry_sz;
+	rx_dr = (struct nix_rx_dr *)cqe;
+	rxparse = &rx_dr->rx_parse;
+
+	debug("%s: rx completion: %p\n", __func__, cqe);
+	debug("%s: rx dr: %p\n", __func__, rx_dr);
+	debug("%s: rx parse: %p\n", __func__, rxparse);
+	debug("%s: rx parse: desc_sizem1 %x pkt_lenm1 %x\n",
+	      __func__, rxparse->s.desc_sizem1, rxparse->s.pkt_lenm1);
+	debug("%s: rx parse: pkind %x chan %x\n",
+	      __func__, rxparse->s.pkind, rxparse->s.chan);
+
+	if (rx_dr->hdr.s.cqe_type != NIX_XQE_TYPE_E_RX) {
+		printf("%s: Error: Unsupported CQ header type in Rx %d\n",
+		       __func__, rx_dr->hdr.s.cqe_type);
+		return -1;
+	}
+
+	pkt_len = rxparse->s.pkt_lenm1 + 1;
+	addr = (dma_addr_t *)(&rx_dr->rx_sg + 1);
+	pkt = (void *)addr[0];
+
+	debug("%s: segs: %d (%d@0x%llx, %d@0x%llx, %d@0x%llx)\n", __func__,
+	      rx_dr->rx_sg.s.segs, rx_dr->rx_sg.s.seg1_size, addr[0],
+	      rx_dr->rx_sg.s.seg2_size, addr[1],
+	      rx_dr->rx_sg.s.seg3_size, addr[2]);
+	if (pkt_len < rx_dr->rx_sg.s.seg1_size + rx_dr->rx_sg.s.seg2_size +
+			rx_dr->rx_sg.s.seg3_size) {
+		debug("%s: Error: rx buffer size too small\n", __func__);
+		return -1;
+	}
+
+	__iowmb();
+#define DEBUG_PKT
+#ifdef DEBUG_PKT
+	debug("RX PKT Data\n");
+	for (int i = 0; i < pkt_len; i++) {
+		if (i && (i % 8 == 0))
+			debug("\n");
+		debug("%02x ", *((u8 *)pkt + i));
+	}
+	debug("\n");
+#endif
+
+	*packetp = (uchar *)pkt;
+
+	return pkt_len;
+}
+
+int nix_lf_setup_mac(struct udevice *dev)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+	struct eth_pdata *pdata = dev_get_plat(dev);
+
+	/* If lower level firmware fails to set proper MAC
+	 * u-boot framework updates MAC to random address.
+	 * Use this hook to update mac address in cgx lmac
+	 * and call mac filter setup to update new address.
+	 */
+	if (memcmp(nix->lmac->mac_addr, pdata->enetaddr, ARP_HLEN)) {
+		memcpy(nix->lmac->mac_addr, pdata->enetaddr, 6);
+		eth_env_set_enetaddr_by_index("eth", dev_seq(rvu->dev),
+					      pdata->enetaddr);
+		cgx_lmac_mac_filter_setup(nix->lmac);
+		/* Update user given MAC address to ATF for update
+		 * in sh_fwdata to use in Linux.
+		 */
+		cgx_intf_set_macaddr(dev);
+		debug("%s: lMAC %pM\n", __func__, nix->lmac->mac_addr);
+		debug("%s: pMAC %pM\n", __func__, pdata->enetaddr);
+	}
+	debug("%s: setupMAC %pM\n", __func__, pdata->enetaddr);
+	return 0;
+}
+
+void nix_lf_halt(struct udevice *dev)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+
+	cgx_lmac_rx_tx_enable(nix->lmac, nix->lmac->lmac_id, false);
+
+	mdelay(1);
+
+	/* Flush tx and rx descriptors */
+	nix_lf_flush_rx(dev);
+	nix_lf_flush_tx(dev);
+}
+
+int nix_lf_init(struct udevice *dev)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+	struct lmac *lmac = nix->lmac;
+	int ret;
+	u64 link_sts;
+	u8 link, speed;
+	u16 errcode;
+
+	printf("Waiting for CGX%d LMAC%d [%s] link status...",
+	       lmac->cgx->cgx_id, lmac->lmac_id,
+	       lmac_type_to_str[lmac->lmac_type]);
+
+	if (lmac->init_pend) {
+		/* Bring up LMAC */
+		ret = cgx_lmac_link_enable(lmac, lmac->lmac_id,
+					   true, &link_sts);
+		lmac->init_pend = 0;
+	} else {
+		ret = cgx_lmac_link_status(lmac, lmac->lmac_id, &link_sts);
+	}
+
+	if (ret) {
+		printf(" [Down]\n");
+		return -1;
+	}
+
+	link = link_sts & 0x1;
+	speed = (link_sts >> 2) & 0xf;
+	errcode = (link_sts >> 6) & 0x2ff;
+	debug("%s: link %x speed %x errcode %x\n",
+	      __func__, link, speed, errcode);
+
+	/* Print link status */
+	printf(" [%s]\n", link ? lmac_speed_to_str[speed] : "Down");
+	if (!link)
+		return -1;
+
+	if (!lmac->init_pend)
+		cgx_lmac_rx_tx_enable(lmac, lmac->lmac_id, true);
+
+	return 0;
+}
+
+void nix_get_cgx_lmac_id(struct udevice *dev, int *cgxid, int *lmacid)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+	struct lmac *lmac = nix->lmac;
+
+	*cgxid = lmac->cgx->cgx_id;
+	*lmacid = lmac->lmac_id;
+}
+
+void nix_print_mac_info(struct udevice *dev)
+{
+	struct rvu_pf *rvu = dev_get_priv(dev);
+	struct nix *nix = rvu->nix;
+	struct lmac *lmac = nix->lmac;
+
+	printf(" CGX%d LMAC%d [%s]", lmac->cgx->cgx_id, lmac->lmac_id,
+	       lmac_type_to_str[lmac->lmac_type]);
+}
+