Merge branch 'qed-qede-improve-chain-API-and-add-XDP_REDIRECT-support'

Alexander Lobakin says:

====================
qed, qede: improve chain API and add XDP_REDIRECT support

This series adds missing XDP_REDIRECT case handling in QLogic Everest
Ethernet driver with all necessary prerequisites and ops.
QEDE Tx relies heavily on chain API, so make sure it is in its best
at first.

v2 (from [1]):
 - add missing includes to #003 to pass the build on Alpha;
 - no functional changes.

[1] https://lore.kernel.org/netdev/20200722155349.747-1-alobakin@marvell.com/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

11 files changed, 831 insertions, 591 deletions

diff --git a/drivers/net/ethernet/qlogic/qed/Makefile b/drivers/net/ethernet/qlogic/qed/Makefile
index 4176bbf2a22b..f947b105cf14 100644
--- a/drivers/net/ethernet/qlogic/qed/Makefile
+++ b/drivers/net/ethernet/qlogic/qed/Makefile
@@ -3,12 +3,35 @@
 
 obj-$(CONFIG_QED) := qed.o
 
-qed-y := qed_cxt.o qed_dev.o qed_hw.o qed_init_fw_funcs.o qed_init_ops.o \
-	 qed_int.o qed_main.o qed_mcp.o qed_sp_commands.o qed_spq.o qed_l2.o \
-	 qed_selftest.o qed_dcbx.o qed_debug.o qed_ptp.o qed_mng_tlv.o
-qed-$(CONFIG_QED_SRIOV) += qed_sriov.o qed_vf.o
-qed-$(CONFIG_QED_LL2) += qed_ll2.o
-qed-$(CONFIG_QED_RDMA) += qed_roce.o qed_rdma.o qed_iwarp.o
-qed-$(CONFIG_QED_ISCSI) += qed_iscsi.o
+qed-y :=			\
+	qed_chain.o		\
+	qed_cxt.o		\
+	qed_dcbx.o		\
+	qed_debug.o		\
+	qed_dev.o		\
+	qed_hw.o		\
+	qed_init_fw_funcs.o	\
+	qed_init_ops.o		\
+	qed_int.o		\
+	qed_l2.o		\
+	qed_main.o		\
+	qed_mcp.o		\
+	qed_mng_tlv.o		\
+	qed_ptp.o		\
+	qed_selftest.o		\
+	qed_sp_commands.o	\
+	qed_spq.o
+
 qed-$(CONFIG_QED_FCOE) += qed_fcoe.o
+qed-$(CONFIG_QED_ISCSI) += qed_iscsi.o
+qed-$(CONFIG_QED_LL2) += qed_ll2.o
 qed-$(CONFIG_QED_OOO) += qed_ooo.o
+
+qed-$(CONFIG_QED_RDMA) +=	\
+	qed_iwarp.o		\
+	qed_rdma.o		\
+	qed_roce.o
+
+qed-$(CONFIG_QED_SRIOV) +=	\
+	qed_sriov.o		\
+	qed_vf.o
diff --git a/drivers/net/ethernet/qlogic/qed/qed_chain.c b/drivers/net/ethernet/qlogic/qed/qed_chain.c
new file mode 100644
index 000000000000..f8efd36d66e0
--- /dev/null
+++ b/drivers/net/ethernet/qlogic/qed/qed_chain.c
@@ -0,0 +1,369 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+/* Copyright (c) 2020 Marvell International Ltd. */
+
+#include <linux/dma-mapping.h>
+#include <linux/qed/qed_chain.h>
+#include <linux/vmalloc.h>
+
+#include "qed_dev_api.h"
+
+static void qed_chain_init(struct qed_chain *chain,
+			   const struct qed_chain_init_params *params,
+			   u32 page_cnt)
+{
+	memset(chain, 0, sizeof(*chain));
+
+	chain->elem_size = params->elem_size;
+	chain->intended_use = params->intended_use;
+	chain->mode = params->mode;
+	chain->cnt_type = params->cnt_type;
+
+	chain->elem_per_page = ELEMS_PER_PAGE(params->elem_size,
+					      params->page_size);
+	chain->usable_per_page = USABLE_ELEMS_PER_PAGE(params->elem_size,
+						       params->page_size,
+						       params->mode);
+	chain->elem_unusable = UNUSABLE_ELEMS_PER_PAGE(params->elem_size,
+						       params->mode);
+
+	chain->elem_per_page_mask = chain->elem_per_page - 1;
+	chain->next_page_mask = chain->usable_per_page &
+				chain->elem_per_page_mask;
+
+	chain->page_size = params->page_size;
+	chain->page_cnt = page_cnt;
+	chain->capacity = chain->usable_per_page * page_cnt;
+	chain->size = chain->elem_per_page * page_cnt;
+
+	if (params->ext_pbl_virt) {
+		chain->pbl_sp.table_virt = params->ext_pbl_virt;
+		chain->pbl_sp.table_phys = params->ext_pbl_phys;
+
+		chain->b_external_pbl = true;
+	}
+}
+
+static void qed_chain_init_next_ptr_elem(const struct qed_chain *chain,
+					 void *virt_curr, void *virt_next,
+					 dma_addr_t phys_next)
+{
+	struct qed_chain_next *next;
+	u32 size;
+
+	size = chain->elem_size * chain->usable_per_page;
+	next = virt_curr + size;
+
+	DMA_REGPAIR_LE(next->next_phys, phys_next);
+	next->next_virt = virt_next;
+}
+
+static void qed_chain_init_mem(struct qed_chain *chain, void *virt_addr,
+			       dma_addr_t phys_addr)
+{
+	chain->p_virt_addr = virt_addr;
+	chain->p_phys_addr = phys_addr;
+}
+
+static void qed_chain_free_next_ptr(struct qed_dev *cdev,
+				    struct qed_chain *chain)
+{
+	struct device *dev = &cdev->pdev->dev;
+	struct qed_chain_next *next;
+	dma_addr_t phys, phys_next;
+	void *virt, *virt_next;
+	u32 size, i;
+
+	size = chain->elem_size * chain->usable_per_page;
+	virt = chain->p_virt_addr;
+	phys = chain->p_phys_addr;
+
+	for (i = 0; i < chain->page_cnt; i++) {
+		if (!virt)
+			break;
+
+		next = virt + size;
+		virt_next = next->next_virt;
+		phys_next = HILO_DMA_REGPAIR(next->next_phys);
+
+		dma_free_coherent(dev, chain->page_size, virt, phys);
+
+		virt = virt_next;
+		phys = phys_next;
+	}
+}
+
+static void qed_chain_free_single(struct qed_dev *cdev,
+				  struct qed_chain *chain)
+{
+	if (!chain->p_virt_addr)
+		return;
+
+	dma_free_coherent(&cdev->pdev->dev, chain->page_size,
+			  chain->p_virt_addr, chain->p_phys_addr);
+}
+
+static void qed_chain_free_pbl(struct qed_dev *cdev, struct qed_chain *chain)
+{
+	struct device *dev = &cdev->pdev->dev;
+	struct addr_tbl_entry *entry;
+	u32 i;
+
+	if (!chain->pbl.pp_addr_tbl)
+		return;
+
+	for (i = 0; i < chain->page_cnt; i++) {
+		entry = chain->pbl.pp_addr_tbl + i;
+		if (!entry->virt_addr)
+			break;
+
+		dma_free_coherent(dev, chain->page_size, entry->virt_addr,
+				  entry->dma_map);
+	}
+
+	if (!chain->b_external_pbl)
+		dma_free_coherent(dev, chain->pbl_sp.table_size,
+				  chain->pbl_sp.table_virt,
+				  chain->pbl_sp.table_phys);
+
+	vfree(chain->pbl.pp_addr_tbl);
+	chain->pbl.pp_addr_tbl = NULL;
+}
+
+/**
+ * qed_chain_free() - Free chain DMA memory.
+ *
+ * @cdev: Main device structure.
+ * @chain: Chain to free.
+ */
+void qed_chain_free(struct qed_dev *cdev, struct qed_chain *chain)
+{
+	switch (chain->mode) {
+	case QED_CHAIN_MODE_NEXT_PTR:
+		qed_chain_free_next_ptr(cdev, chain);
+		break;
+	case QED_CHAIN_MODE_SINGLE:
+		qed_chain_free_single(cdev, chain);
+		break;
+	case QED_CHAIN_MODE_PBL:
+		qed_chain_free_pbl(cdev, chain);
+		break;
+	default:
+		return;
+	}
+
+	qed_chain_init_mem(chain, NULL, 0);
+}
+
+static int
+qed_chain_alloc_sanity_check(struct qed_dev *cdev,
+			     const struct qed_chain_init_params *params,
+			     u32 page_cnt)
+{
+	u64 chain_size;
+
+	chain_size = ELEMS_PER_PAGE(params->elem_size, params->page_size);
+	chain_size *= page_cnt;
+
+	if (!chain_size)
+		return -EINVAL;
+
+	/* The actual chain size can be larger than the maximal possible value
+	 * after rounding up the requested elements number to pages, and after
+	 * taking into account the unusuable elements (next-ptr elements).
+	 * The size of a "u16" chain can be (U16_MAX + 1) since the chain
+	 * size/capacity fields are of u32 type.
+	 */
+	switch (params->cnt_type) {
+	case QED_CHAIN_CNT_TYPE_U16:
+		if (chain_size > U16_MAX + 1)
+			break;
+
+		return 0;
+	case QED_CHAIN_CNT_TYPE_U32:
+		if (chain_size > U32_MAX)
+			break;
+
+		return 0;
+	default:
+		return -EINVAL;
+	}
+
+	DP_NOTICE(cdev,
+		  "The actual chain size (0x%llx) is larger than the maximal possible value\n",
+		  chain_size);
+
+	return -EINVAL;
+}
+
+static int qed_chain_alloc_next_ptr(struct qed_dev *cdev,
+				    struct qed_chain *chain)
+{
+	struct device *dev = &cdev->pdev->dev;
+	void *virt, *virt_prev = NULL;
+	dma_addr_t phys;
+	u32 i;
+
+	for (i = 0; i < chain->page_cnt; i++) {
+		virt = dma_alloc_coherent(dev, chain->page_size, &phys,
+					  GFP_KERNEL);
+		if (!virt)
+			return -ENOMEM;
+
+		if (i == 0) {
+			qed_chain_init_mem(chain, virt, phys);
+			qed_chain_reset(chain);
+		} else {
+			qed_chain_init_next_ptr_elem(chain, virt_prev, virt,
+						     phys);
+		}
+
+		virt_prev = virt;
+	}
+
+	/* Last page's next element should point to the beginning of the
+	 * chain.
+	 */
+	qed_chain_init_next_ptr_elem(chain, virt_prev, chain->p_virt_addr,
+				     chain->p_phys_addr);
+
+	return 0;
+}
+
+static int qed_chain_alloc_single(struct qed_dev *cdev,
+				  struct qed_chain *chain)
+{
+	dma_addr_t phys;
+	void *virt;
+
+	virt = dma_alloc_coherent(&cdev->pdev->dev, chain->page_size,
+				  &phys, GFP_KERNEL);
+	if (!virt)
+		return -ENOMEM;
+
+	qed_chain_init_mem(chain, virt, phys);
+	qed_chain_reset(chain);
+
+	return 0;
+}
+
+static int qed_chain_alloc_pbl(struct qed_dev *cdev, struct qed_chain *chain)
+{
+	struct device *dev = &cdev->pdev->dev;
+	struct addr_tbl_entry *addr_tbl;
+	dma_addr_t phys, pbl_phys;
+	__le64 *pbl_virt;
+	u32 page_cnt, i;
+	size_t size;
+	void *virt;
+
+	page_cnt = chain->page_cnt;
+
+	size = array_size(page_cnt, sizeof(*addr_tbl));
+	if (unlikely(size == SIZE_MAX))
+		return -EOVERFLOW;
+
+	addr_tbl = vzalloc(size);
+	if (!addr_tbl)
+		return -ENOMEM;
+
+	chain->pbl.pp_addr_tbl = addr_tbl;
+
+	if (chain->b_external_pbl)
+		goto alloc_pages;
+
+	size = array_size(page_cnt, sizeof(*pbl_virt));
+	if (unlikely(size == SIZE_MAX))
+		return -EOVERFLOW;
+
+	pbl_virt = dma_alloc_coherent(dev, size, &pbl_phys, GFP_KERNEL);
+	if (!pbl_virt)
+		return -ENOMEM;
+
+	chain->pbl_sp.table_virt = pbl_virt;
+	chain->pbl_sp.table_phys = pbl_phys;
+	chain->pbl_sp.table_size = size;
+
+alloc_pages:
+	for (i = 0; i < page_cnt; i++) {
+		virt = dma_alloc_coherent(dev, chain->page_size, &phys,
+					  GFP_KERNEL);
+		if (!virt)
+			return -ENOMEM;
+
+		if (i == 0) {
+			qed_chain_init_mem(chain, virt, phys);
+			qed_chain_reset(chain);
+		}
+
+		/* Fill the PBL table with the physical address of the page */
+		pbl_virt[i] = cpu_to_le64(phys);
+
+		/* Keep the virtual address of the page */
+		addr_tbl[i].virt_addr = virt;
+		addr_tbl[i].dma_map = phys;
+	}
+
+	return 0;
+}
+
+/**
+ * qed_chain_alloc() - Allocate and initialize a chain.
+ *
+ * @cdev: Main device structure.
+ * @chain: Chain to be processed.
+ * @params: Chain initialization parameters.
+ *
+ * Return: 0 on success, negative errno otherwise.
+ */
+int qed_chain_alloc(struct qed_dev *cdev, struct qed_chain *chain,
+		    struct qed_chain_init_params *params)
+{
+	u32 page_cnt;
+	int rc;
+
+	if (!params->page_size)
+		params->page_size = QED_CHAIN_PAGE_SIZE;
+
+	if (params->mode == QED_CHAIN_MODE_SINGLE)
+		page_cnt = 1;
+	else
+		page_cnt = QED_CHAIN_PAGE_CNT(params->num_elems,
+					      params->elem_size,
+					      params->page_size,
+					      params->mode);
+
+	rc = qed_chain_alloc_sanity_check(cdev, params, page_cnt);
+	if (rc) {
+		DP_NOTICE(cdev,
+			  "Cannot allocate a chain with the given arguments:\n");
+		DP_NOTICE(cdev,
+			  "[use_mode %d, mode %d, cnt_type %d, num_elems %d, elem_size %zu, page_size %u]\n",
+			  params->intended_use, params->mode, params->cnt_type,
+			  params->num_elems, params->elem_size,
+			  params->page_size);
+		return rc;
+	}
+
+	qed_chain_init(chain, params, page_cnt);
+
+	switch (params->mode) {
+	case QED_CHAIN_MODE_NEXT_PTR:
+		rc = qed_chain_alloc_next_ptr(cdev, chain);
+		break;
+	case QED_CHAIN_MODE_SINGLE:
+		rc = qed_chain_alloc_single(cdev, chain);
+		break;
+	case QED_CHAIN_MODE_PBL:
+		rc = qed_chain_alloc_pbl(cdev, chain);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (!rc)
+		return 0;
+
+	qed_chain_free(cdev, chain);
+
+	return rc;
+}
diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index 6516a1f921da..d9c7a1a6be94 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -4716,279 +4716,6 @@ void qed_hw_remove(struct qed_dev *cdev)
 	qed_mcp_nvm_info_free(p_hwfn);
 }
 
-static void qed_chain_free_next_ptr(struct qed_dev *cdev,
-				    struct qed_chain *p_chain)
-{
-	void *p_virt = p_chain->p_virt_addr, *p_virt_next = NULL;
-	dma_addr_t p_phys = p_chain->p_phys_addr, p_phys_next = 0;
-	struct qed_chain_next *p_next;
-	u32 size, i;
-
-	if (!p_virt)
-		return;
-
-	size = p_chain->elem_size * p_chain->usable_per_page;
-
-	for (i = 0; i < p_chain->page_cnt; i++) {
-		if (!p_virt)
-			break;
-
-		p_next = (struct qed_chain_next *)((u8 *)p_virt + size);
-		p_virt_next = p_next->next_virt;
-		p_phys_next = HILO_DMA_REGPAIR(p_next->next_phys);
-
-		dma_free_coherent(&cdev->pdev->dev,
-				  QED_CHAIN_PAGE_SIZE, p_virt, p_phys);
-
-		p_virt = p_virt_next;
-		p_phys = p_phys_next;
-	}
-}
-
-static void qed_chain_free_single(struct qed_dev *cdev,
-				  struct qed_chain *p_chain)
-{
-	if (!p_chain->p_virt_addr)
-		return;
-
-	dma_free_coherent(&cdev->pdev->dev,
-			  QED_CHAIN_PAGE_SIZE,
-			  p_chain->p_virt_addr, p_chain->p_phys_addr);
-}
-
-static void qed_chain_free_pbl(struct qed_dev *cdev, struct qed_chain *p_chain)
-{
-	struct addr_tbl_entry *pp_addr_tbl = p_chain->pbl.pp_addr_tbl;
-	u32 page_cnt = p_chain->page_cnt, i, pbl_size;
-
-	if (!pp_addr_tbl)
-		return;
-
-	for (i = 0; i < page_cnt; i++) {
-		if (!pp_addr_tbl[i].virt_addr || !pp_addr_tbl[i].dma_map)
-			break;
-
-		dma_free_coherent(&cdev->pdev->dev,
-				  QED_CHAIN_PAGE_SIZE,
-				  pp_addr_tbl[i].virt_addr,
-				  pp_addr_tbl[i].dma_map);
-	}
-
-	pbl_size = page_cnt * QED_CHAIN_PBL_ENTRY_SIZE;
-
-	if (!p_chain->b_external_pbl)
-		dma_free_coherent(&cdev->pdev->dev,
-				  pbl_size,
-				  p_chain->pbl_sp.p_virt_table,
-				  p_chain->pbl_sp.p_phys_table);
-
-	vfree(p_chain->pbl.pp_addr_tbl);
-	p_chain->pbl.pp_addr_tbl = NULL;
-}
-
-void qed_chain_free(struct qed_dev *cdev, struct qed_chain *p_chain)
-{
-	switch (p_chain->mode) {
-	case QED_CHAIN_MODE_NEXT_PTR:
-		qed_chain_free_next_ptr(cdev, p_chain);
-		break;
-	case QED_CHAIN_MODE_SINGLE:
-		qed_chain_free_single(cdev, p_chain);
-		break;
-	case QED_CHAIN_MODE_PBL:
-		qed_chain_free_pbl(cdev, p_chain);
-		break;
-	}
-}
-
-static int
-qed_chain_alloc_sanity_check(struct qed_dev *cdev,
-			     enum qed_chain_cnt_type cnt_type,
-			     size_t elem_size, u32 page_cnt)
-{
-	u64 chain_size = ELEMS_PER_PAGE(elem_size) * page_cnt;
-
-	/* The actual chain size can be larger than the maximal possible value
-	 * after rounding up the requested elements number to pages, and after
-	 * taking into acount the unusuable elements (next-ptr elements).
-	 * The size of a "u16" chain can be (U16_MAX + 1) since the chain
-	 * size/capacity fields are of a u32 type.
-	 */
-	if ((cnt_type == QED_CHAIN_CNT_TYPE_U16 &&
-	     chain_size > ((u32)U16_MAX + 1)) ||
-	    (cnt_type == QED_CHAIN_CNT_TYPE_U32 && chain_size > U32_MAX)) {
-		DP_NOTICE(cdev,
-			  "The actual chain size (0x%llx) is larger than the maximal possible value\n",
-			  chain_size);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int
-qed_chain_alloc_next_ptr(struct qed_dev *cdev, struct qed_chain *p_chain)
-{
-	void *p_virt = NULL, *p_virt_prev = NULL;
-	dma_addr_t p_phys = 0;
-	u32 i;
-
-	for (i = 0; i < p_chain->page_cnt; i++) {
-		p_virt = dma_alloc_coherent(&cdev->pdev->dev,
-					    QED_CHAIN_PAGE_SIZE,
-					    &p_phys, GFP_KERNEL);
-		if (!p_virt)
-			return -ENOMEM;
-
-		if (i == 0) {
-			qed_chain_init_mem(p_chain, p_virt, p_phys);
-			qed_chain_reset(p_chain);
-		} else {
-			qed_chain_init_next_ptr_elem(p_chain, p_virt_prev,
-						     p_virt, p_phys);
-		}
-
-		p_virt_prev = p_virt;
-	}
-	/* Last page's next element should point to the beginning of the
-	 * chain.
-	 */
-	qed_chain_init_next_ptr_elem(p_chain, p_virt_prev,
-				     p_chain->p_virt_addr,
-				     p_chain->p_phys_addr);
-
-	return 0;
-}
-
-static int
-qed_chain_alloc_single(struct qed_dev *cdev, struct qed_chain *p_chain)
-{
-	dma_addr_t p_phys = 0;
-	void *p_virt = NULL;
-
-	p_virt = dma_alloc_coherent(&cdev->pdev->dev,
-				    QED_CHAIN_PAGE_SIZE, &p_phys, GFP_KERNEL);
-	if (!p_virt)
-		return -ENOMEM;
-
-	qed_chain_init_mem(p_chain, p_virt, p_phys);
-	qed_chain_reset(p_chain);
-
-	return 0;
-}
-
-static int
-qed_chain_alloc_pbl(struct qed_dev *cdev,
-		    struct qed_chain *p_chain,
-		    struct qed_chain_ext_pbl *ext_pbl)
-{
-	u32 page_cnt = p_chain->page_cnt, size, i;
-	dma_addr_t p_phys = 0, p_pbl_phys = 0;
-	struct addr_tbl_entry *pp_addr_tbl;
-	u8 *p_pbl_virt = NULL;
-	void *p_virt = NULL;
-
-	size = page_cnt * sizeof(*pp_addr_tbl);
-	pp_addr_tbl =  vzalloc(size);
-	if (!pp_addr_tbl)
-		return -ENOMEM;
-
-	/* The allocation of the PBL table is done with its full size, since it
-	 * is expected to be successive.
-	 * qed_chain_init_pbl_mem() is called even in a case of an allocation
-	 * failure, since tbl was previously allocated, and it
-	 * should be saved to allow its freeing during the error flow.
-	 */
-	size = page_cnt * QED_CHAIN_PBL_ENTRY_SIZE;
-
-	if (!ext_pbl) {
-		p_pbl_virt = dma_alloc_coherent(&cdev->pdev->dev,
-						size, &p_pbl_phys, GFP_KERNEL);
-	} else {
-		p_pbl_virt = ext_pbl->p_pbl_virt;
-		p_pbl_phys = ext_pbl->p_pbl_phys;
-		p_chain->b_external_pbl = true;
-	}
-
-	qed_chain_init_pbl_mem(p_chain, p_pbl_virt, p_pbl_phys, pp_addr_tbl);
-	if (!p_pbl_virt)
-		return -ENOMEM;
-
-	for (i = 0; i < page_cnt; i++) {
-		p_virt = dma_alloc_coherent(&cdev->pdev->dev,
-					    QED_CHAIN_PAGE_SIZE,
-					    &p_phys, GFP_KERNEL);
-		if (!p_virt)
-			return -ENOMEM;
-
-		if (i == 0) {
-			qed_chain_init_mem(p_chain, p_virt, p_phys);
-			qed_chain_reset(p_chain);
-		}
-
-		/* Fill the PBL table with the physical address of the page */
-		*(dma_addr_t *)p_pbl_virt = p_phys;
-		/* Keep the virtual address of the page */
-		p_chain->pbl.pp_addr_tbl[i].virt_addr = p_virt;
-		p_chain->pbl.pp_addr_tbl[i].dma_map = p_phys;
-
-		p_pbl_virt += QED_CHAIN_PBL_ENTRY_SIZE;
-	}
-
-	return 0;
-}
-
-int qed_chain_alloc(struct qed_dev *cdev,
-		    enum qed_chain_use_mode intended_use,
-		    enum qed_chain_mode mode,
-		    enum qed_chain_cnt_type cnt_type,
-		    u32 num_elems,
-		    size_t elem_size,
-		    struct qed_chain *p_chain,
-		    struct qed_chain_ext_pbl *ext_pbl)
-{
-	u32 page_cnt;
-	int rc = 0;
-
-	if (mode == QED_CHAIN_MODE_SINGLE)
-		page_cnt = 1;
-	else
-		page_cnt = QED_CHAIN_PAGE_CNT(num_elems, elem_size, mode);
-
-	rc = qed_chain_alloc_sanity_check(cdev, cnt_type, elem_size, page_cnt);
-	if (rc) {
-		DP_NOTICE(cdev,
-			  "Cannot allocate a chain with the given arguments:\n");
-		DP_NOTICE(cdev,
-			  "[use_mode %d, mode %d, cnt_type %d, num_elems %d, elem_size %zu]\n",
-			  intended_use, mode, cnt_type, num_elems, elem_size);
-		return rc;
-	}
-
-	qed_chain_init_params(p_chain, page_cnt, (u8) elem_size, intended_use,
-			      mode, cnt_type);
-
-	switch (mode) {
-	case QED_CHAIN_MODE_NEXT_PTR:
-		rc = qed_chain_alloc_next_ptr(cdev, p_chain);
-		break;
-	case QED_CHAIN_MODE_SINGLE:
-		rc = qed_chain_alloc_single(cdev, p_chain);
-		break;
-	case QED_CHAIN_MODE_PBL:
-		rc = qed_chain_alloc_pbl(cdev, p_chain, ext_pbl);
-		break;
-	}
-	if (rc)
-		goto nomem;
-
-	return 0;
-
-nomem:
-	qed_chain_free(cdev, p_chain);
-	return rc;
-}
-
 int qed_fw_l2_queue(struct qed_hwfn *p_hwfn, u16 src_id, u16 *dst_id)
 {
 	if (src_id >= RESC_NUM(p_hwfn, QED_L2_QUEUE)) {
diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev_api.h b/drivers/net/ethernet/qlogic/qed/qed_dev_api.h
index 395d4932c262..d3c1f3879be8 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev_api.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev_api.h
@@ -254,35 +254,9 @@ int qed_dmae_host2host(struct qed_hwfn *p_hwfn,
 		       dma_addr_t dest_addr,
 		       u32 size_in_dwords, struct qed_dmae_params *p_params);
 
-/**
- * @brief qed_chain_alloc - Allocate and initialize a chain
- *
- * @param p_hwfn
- * @param intended_use
- * @param mode
- * @param num_elems
- * @param elem_size
- * @param p_chain
- * @param ext_pbl - a possible external PBL
- *
- * @return int
- */
-int
-qed_chain_alloc(struct qed_dev *cdev,
-		enum qed_chain_use_mode intended_use,
-		enum qed_chain_mode mode,
-		enum qed_chain_cnt_type cnt_type,
-		u32 num_elems,
-		size_t elem_size,
-		struct qed_chain *p_chain, struct qed_chain_ext_pbl *ext_pbl);
-
-/**
- * @brief qed_chain_free - Free chain DMA memory
- *
- * @param p_hwfn
- * @param p_chain
- */
-void qed_chain_free(struct qed_dev *cdev, struct qed_chain *p_chain);
+int qed_chain_alloc(struct qed_dev *cdev, struct qed_chain *chain,
+		    struct qed_chain_init_params *params);
+void qed_chain_free(struct qed_dev *cdev, struct qed_chain *chain);
 
 /**
  * @@brief qed_fw_l2_queue - Get absolute L2 queue ID
diff --git a/drivers/net/ethernet/qlogic/qed/qed_iscsi.c b/drivers/net/ethernet/qlogic/qed/qed_iscsi.c
index 25d2c882d7ac..4eae4ee3538f 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_iscsi.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_iscsi.c
@@ -684,9 +684,13 @@ nomem:
 static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
 					 struct qed_iscsi_conn **p_out_conn)
 {
-	u16 uhq_num_elements = 0, xhq_num_elements = 0, r2tq_num_elements = 0;
 	struct scsi_terminate_extra_params *p_q_cnts = NULL;
 	struct qed_iscsi_pf_params *p_params = NULL;
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_PBL,
+		.intended_use	= QED_CHAIN_USE_TO_CONSUME_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+	};
 	struct tcp_upload_params *p_tcp = NULL;
 	struct qed_iscsi_conn *p_conn = NULL;
 	int rc = 0;
@@ -727,34 +731,25 @@ static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
 		goto nomem_upload_param;
 	p_conn->tcp_upload_params_virt_addr = p_tcp;
 
-	r2tq_num_elements = p_params->num_r2tq_pages_in_ring *
-			    QED_CHAIN_PAGE_SIZE / 0x80;
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     r2tq_num_elements, 0x80, &p_conn->r2tq, NULL);
+	params.num_elems = p_params->num_r2tq_pages_in_ring *
+			   QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_wqe);
+	params.elem_size = sizeof(struct iscsi_wqe);
+
+	rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->r2tq, &params);
 	if (rc)
 		goto nomem_r2tq;
 
-	uhq_num_elements = p_params->num_uhq_pages_in_ring *
+	params.num_elems = p_params->num_uhq_pages_in_ring *
 			   QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     uhq_num_elements,
-			     sizeof(struct iscsi_uhqe), &p_conn->uhq, NULL);
+	params.elem_size = sizeof(struct iscsi_uhqe);
+
+	rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->uhq, &params);
 	if (rc)
 		goto nomem_uhq;
 
-	xhq_num_elements = uhq_num_elements;
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     xhq_num_elements,
-			     sizeof(struct iscsi_xhqe), &p_conn->xhq, NULL);
+	params.elem_size = sizeof(struct iscsi_xhqe);
+
+	rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->xhq, &params);
 	if (rc)
 		goto nomem;
 
diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.c b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
index 6f4aec339cd4..0452b728c527 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_ll2.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
@@ -1125,6 +1125,12 @@ static int
 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
 			      struct qed_ll2_info *p_ll2_info)
 {
+	struct qed_chain_init_params params = {
+		.intended_use	= QED_CHAIN_USE_TO_CONSUME_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.num_elems	= p_ll2_info->input.rx_num_desc,
+	};
+	struct qed_dev *cdev = p_hwfn->cdev;
 	struct qed_ll2_rx_packet *p_descq;
 	u32 capacity;
 	int rc = 0;
@@ -1132,13 +1138,10 @@ qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
 	if (!p_ll2_info->input.rx_num_desc)
 		goto out;
 
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_NEXT_PTR,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     p_ll2_info->input.rx_num_desc,
-			     sizeof(struct core_rx_bd),
-			     &p_ll2_info->rx_queue.rxq_chain, NULL);
+	params.mode = QED_CHAIN_MODE_NEXT_PTR;
+	params.elem_size = sizeof(struct core_rx_bd);
+
+	rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rxq_chain, &params);
 	if (rc) {
 		DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
 		goto out;
@@ -1154,13 +1157,10 @@ qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
 	}
 	p_ll2_info->rx_queue.descq_array = p_descq;
 
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     p_ll2_info->input.rx_num_desc,
-			     sizeof(struct core_rx_fast_path_cqe),
-			     &p_ll2_info->rx_queue.rcq_chain, NULL);
+	params.mode = QED_CHAIN_MODE_PBL;
+	params.elem_size = sizeof(struct core_rx_fast_path_cqe);
+
+	rc = qed_chain_alloc(cdev, &p_ll2_info->rx_queue.rcq_chain, &params);
 	if (rc) {
 		DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
 		goto out;
@@ -1177,6 +1177,13 @@ out:
 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
 					 struct qed_ll2_info *p_ll2_info)
 {
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_PBL,
+		.intended_use	= QED_CHAIN_USE_TO_CONSUME_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.num_elems	= p_ll2_info->input.tx_num_desc,
+		.elem_size	= sizeof(struct core_tx_bd),
+	};
 	struct qed_ll2_tx_packet *p_descq;
 	u32 desc_size;
 	u32 capacity;
@@ -1185,13 +1192,8 @@ static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
 	if (!p_ll2_info->input.tx_num_desc)
 		goto out;
 
-	rc = qed_chain_alloc(p_hwfn->cdev,
-			     QED_CHAIN_USE_TO_CONSUME_PRODUCE,
-			     QED_CHAIN_MODE_PBL,
-			     QED_CHAIN_CNT_TYPE_U16,
-			     p_ll2_info->input.tx_num_desc,
-			     sizeof(struct core_tx_bd),
-			     &p_ll2_info->tx_queue.txq_chain, NULL);
+	rc = qed_chain_alloc(p_hwfn->cdev, &p_ll2_info->tx_queue.txq_chain,
+			     &params);
 	if (rc)
 		goto out;
 
diff --git a/drivers/net/ethernet/qlogic/qed/qed_sp_commands.c b/drivers/net/ethernet/qlogic/qed/qed_sp_commands.c
index 8142f5669b26..aa71adcf31ee 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_sp_commands.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_sp_commands.c
@@ -366,11 +366,11 @@ int qed_sp_pf_start(struct qed_hwfn *p_hwfn,
 
 	/* Place EQ address in RAMROD */
 	DMA_REGPAIR_LE(p_ramrod->event_ring_pbl_addr,
-		       p_hwfn->p_eq->chain.pbl_sp.p_phys_table);
+		       qed_chain_get_pbl_phys(&p_hwfn->p_eq->chain));
 	page_cnt = (u8)qed_chain_get_page_cnt(&p_hwfn->p_eq->chain);
 	p_ramrod->event_ring_num_pages = page_cnt;
 	DMA_REGPAIR_LE(p_ramrod->consolid_q_pbl_addr,
-		       p_hwfn->p_consq->chain.pbl_sp.p_phys_table);
+		       qed_chain_get_pbl_phys(&p_hwfn->p_consq->chain));
 
 	qed_tunn_set_pf_start_params(p_hwfn, p_tunn, &p_ramrod->tunnel_config);
 
diff --git a/drivers/net/ethernet/qlogic/qed/qed_spq.c b/drivers/net/ethernet/qlogic/qed/qed_spq.c
index 92ab029789e5..0bc1a0aeb56e 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_spq.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_spq.c
@@ -382,22 +382,26 @@ int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie)
 
 int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem)
 {
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_PBL,
+		.intended_use	= QED_CHAIN_USE_TO_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.num_elems	= num_elem,
+		.elem_size	= sizeof(union event_ring_element),
+	};
 	struct qed_eq *p_eq;
+	int ret;
 
 	/* Allocate EQ struct */
 	p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL);
 	if (!p_eq)
 		return -ENOMEM;
 
-	/* Allocate and initialize EQ chain*/
-	if (qed_chain_alloc(p_hwfn->cdev,
-			    QED_CHAIN_USE_TO_PRODUCE,
-			    QED_CHAIN_MODE_PBL,
-			    QED_CHAIN_CNT_TYPE_U16,
-			    num_elem,
-			    sizeof(union event_ring_element),
-			    &p_eq->chain, NULL))
+	ret = qed_chain_alloc(p_hwfn->cdev, &p_eq->chain, &params);
+	if (ret) {
+		DP_NOTICE(p_hwfn, "Failed to allocate EQ chain\n");
 		goto eq_allocate_fail;
+	}
 
 	/* register EQ completion on the SP SB */
 	qed_int_register_cb(p_hwfn, qed_eq_completion,
@@ -408,7 +412,8 @@ int qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem)
 
 eq_allocate_fail:
 	kfree(p_eq);
-	return -ENOMEM;
+
+	return ret;
 }
 
 void qed_eq_setup(struct qed_hwfn *p_hwfn)
@@ -529,33 +534,40 @@ void qed_spq_setup(struct qed_hwfn *p_hwfn)
 
 int qed_spq_alloc(struct qed_hwfn *p_hwfn)
 {
+	struct qed_chain_init_params params = {
+		.mode		= QED_CHAIN_MODE_SINGLE,
+		.intended_use	= QED_CHAIN_USE_TO_PRODUCE,
+		.cnt_type	= QED_CHAIN_CNT_TYPE_U16,
+		.elem_size	= sizeof(struct slow_path_element),
+	};
+	struct qed_dev *cdev = p_hwfn->cdev;
 	struct qed_spq_entry *p_virt = NULL;
 	struct qed_spq *p_spq = NULL;
 	dma_addr_t p_phys = 0;
 	u32 capacity;
+	int ret;
 
 	/* SPQ struct */
 	p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL);
 	if (!p_spq)
 		return -ENOMEM;
 
-	/* SPQ ring  */
-	if (qed_chain_alloc(p_hwfn->cdev,
-			    QED_CHAIN_USE_TO_PRODUCE,
-			    QED_CHAIN_MODE_SINGLE,
-			    QED_CHAIN_CNT_TYPE_U16,
-			    0,   /* N/A when the mode is SINGLE */
-			    sizeof(struct slow_path_element),
-			    &p_spq->chain, NULL))
-		goto spq_allocate_fail;
+	/* SPQ ring */
+	ret = qed_chain_alloc(cdev, &p_spq->chain, &params);
+	if (ret) {
+		DP_NOTICE(p_hwfn, "Failed to allocate SPQ chain\n");
+		goto spq_chain_alloc_fail;
+	}
 
 	/* allocate and fill the SPQ elements (incl. ramrod data list) */
 	capacity = qed_chain_get_capacity(&p_spq->chain);
-	p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
+	ret = -ENOMEM;
+
+	p_virt = dma_alloc_coherent(&cdev->pdev->dev,
 				    capacity * sizeof(struct qed_spq_entry),
 				    &p_phys, GFP_KERNEL);
 	if (!p_virt)
-		goto spq_allocate_fail;
+		goto spq_alloc_fail;
 
 	p_spq->p_virt = p_virt;
 	p_spq->p_phys = p_phys;
@@ -563,10 +575,12 @@ int qed_spq_alloc(struct qed_hwfn *p_hwfn)
 
 	return 0;