RDMA/efa: Add EFA verbs implementation

Add a file that implements the EFA verbs.
Signed-off-by: Gal Pressman <galpress@amazon.com>
Reviewed-by: Shiraz Saleem <shiraz.saleem@intel.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/efa/efa_verbs.c

+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved.
+ */
+
+#include <linux/vmalloc.h>
+
+#include <rdma/ib_addr.h>
+#include <rdma/ib_umem.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/uverbs_ioctl.h>
+
+#include "efa.h"
+
+#define EFA_MMAP_FLAG_SHIFT 56
+#define EFA_MMAP_PAGE_MASK GENMASK(EFA_MMAP_FLAG_SHIFT - 1, 0)
+#define EFA_MMAP_INVALID U64_MAX
+
+enum {
+	EFA_MMAP_DMA_PAGE = 0,
+	EFA_MMAP_IO_WC,
+	EFA_MMAP_IO_NC,
+};
+
+#define EFA_AENQ_ENABLED_GROUPS \
+	(BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
+	 BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
+
+struct efa_mmap_entry {
+	void  *obj;
+	u64 address;
+	u64 length;
+	u32 mmap_page;
+	u8 mmap_flag;
+};
+
+static inline u64 get_mmap_key(const struct efa_mmap_entry *efa)
+{
+	return ((u64)efa->mmap_flag << EFA_MMAP_FLAG_SHIFT) |
+	       ((u64)efa->mmap_page << PAGE_SHIFT);
+}
+
+#define EFA_CHUNK_PAYLOAD_SHIFT       12
+#define EFA_CHUNK_PAYLOAD_SIZE        BIT(EFA_CHUNK_PAYLOAD_SHIFT)
+#define EFA_CHUNK_PAYLOAD_PTR_SIZE    8
+
+#define EFA_CHUNK_SHIFT               12
+#define EFA_CHUNK_SIZE                BIT(EFA_CHUNK_SHIFT)
+#define EFA_CHUNK_PTR_SIZE            sizeof(struct efa_com_ctrl_buff_info)
+
+#define EFA_PTRS_PER_CHUNK \
+	((EFA_CHUNK_SIZE - EFA_CHUNK_PTR_SIZE) / EFA_CHUNK_PAYLOAD_PTR_SIZE)
+
+#define EFA_CHUNK_USED_SIZE \
+	((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
+
+#define EFA_SUPPORTED_ACCESS_FLAGS IB_ACCESS_LOCAL_WRITE
+
+struct pbl_chunk {
+	dma_addr_t dma_addr;
+	u64 *buf;
+	u32 length;
+};
+
+struct pbl_chunk_list {
+	struct pbl_chunk *chunks;
+	unsigned int size;
+};
+
+struct pbl_context {
+	union {
+		struct {
+			dma_addr_t dma_addr;
+		} continuous;
+		struct {
+			u32 pbl_buf_size_in_pages;
+			struct scatterlist *sgl;
+			int sg_dma_cnt;
+			struct pbl_chunk_list chunk_list;
+		} indirect;
+	} phys;
+	u64 *pbl_buf;
+	u32 pbl_buf_size_in_bytes;
+	u8 physically_continuous;
+};
+
+static inline struct efa_dev *to_edev(struct ib_device *ibdev)
+{
+	return container_of(ibdev, struct efa_dev, ibdev);
+}
+
+static inline struct efa_ucontext *to_eucontext(struct ib_ucontext *ibucontext)
+{
+	return container_of(ibucontext, struct efa_ucontext, ibucontext);
+}
+
+static inline struct efa_pd *to_epd(struct ib_pd *ibpd)
+{
+	return container_of(ibpd, struct efa_pd, ibpd);
+}
+
+static inline struct efa_mr *to_emr(struct ib_mr *ibmr)
+{
+	return container_of(ibmr, struct efa_mr, ibmr);
+}
+
+static inline struct efa_qp *to_eqp(struct ib_qp *ibqp)
+{
+	return container_of(ibqp, struct efa_qp, ibqp);
+}
+
+static inline struct efa_cq *to_ecq(struct ib_cq *ibcq)
+{
+	return container_of(ibcq, struct efa_cq, ibcq);
+}
+
+static inline struct efa_ah *to_eah(struct ib_ah *ibah)
+{
+	return container_of(ibah, struct efa_ah, ibah);
+}
+
+#define field_avail(x, fld, sz) (offsetof(typeof(x), fld) + \
+				 sizeof(((typeof(x) *)0)->fld) <= (sz))
+
+#define is_reserved_cleared(reserved) \
+	!memchr_inv(reserved, 0, sizeof(reserved))
+
+static void *efa_zalloc_mapped(struct efa_dev *dev, dma_addr_t *dma_addr,
+			       size_t size, enum dma_data_direction dir)
+{
+	void *addr;
+
+	addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
+	if (!addr)
+		return NULL;
+
+	*dma_addr = dma_map_single(&dev->pdev->dev, addr, size, dir);
+	if (dma_mapping_error(&dev->pdev->dev, *dma_addr)) {
+		ibdev_err(&dev->ibdev, "Failed to map DMA address\n");
+		free_pages_exact(addr, size);
+		return NULL;
+	}
+
+	return addr;
+}
+
+/*
+ * This is only called when the ucontext is destroyed and there can be no
+ * concurrent query via mmap or allocate on the xarray, thus we can be sure no
+ * other thread is using the entry pointer. We also know that all the BAR
+ * pages have either been zap'd or munmaped at this point.  Normal pages are
+ * refcounted and will be freed at the proper time.
+ */
+static void mmap_entries_remove_free(struct efa_dev *dev,
+				     struct efa_ucontext *ucontext)
+{
+	struct efa_mmap_entry *entry;
+	unsigned long mmap_page;
+
+	xa_for_each(&ucontext->mmap_xa, mmap_page, entry) {
+		xa_erase(&ucontext->mmap_xa, mmap_page);
+
+		ibdev_dbg(
+			&dev->ibdev,
+			"mmap: obj[0x%p] key[%#llx] addr[%#llx] len[%#llx] removed\n",
+			entry->obj, get_mmap_key(entry), entry->address,
+			entry->length);
+		if (entry->mmap_flag == EFA_MMAP_DMA_PAGE)
+			/* DMA mapping is already gone, now free the pages */
+			free_pages_exact(phys_to_virt(entry->address),
+					 entry->length);
+		kfree(entry);
+	}
+}
+
+static struct efa_mmap_entry *mmap_entry_get(struct efa_dev *dev,
+					     struct efa_ucontext *ucontext,
+					     u64 key, u64 len)
+{
+	struct efa_mmap_entry *entry;
+	u64 mmap_page;
+
+	mmap_page = (key & EFA_MMAP_PAGE_MASK) >> PAGE_SHIFT;
+	if (mmap_page > U32_MAX)
+		return NULL;
+
+	entry = xa_load(&ucontext->mmap_xa, mmap_page);
+	if (!entry || get_mmap_key(entry) != key || entry->length != len)
+		return NULL;
+
+	ibdev_dbg(&dev->ibdev,
+		  "mmap: obj[0x%p] key[%#llx] addr[%#llx] len[%#llx] removed\n",
+		  entry->obj, key, entry->address, entry->length);
+
+	return entry;
+}
+
+/*
+ * Note this locking scheme cannot support removal of entries, except during
+ * ucontext destruction when the core code guarentees no concurrency.
+ */
+static u64 mmap_entry_insert(struct efa_dev *dev, struct efa_ucontext *ucontext,
+			     void *obj, u64 address, u64 length, u8 mmap_flag)
+{
+	struct efa_mmap_entry *entry;
+	int err;
+
+	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+	if (!entry)
+		return EFA_MMAP_INVALID;
+
+	entry->obj = obj;
+	entry->address = address;
+	entry->length = length;
+	entry->mmap_flag = mmap_flag;
+
+	xa_lock(&ucontext->mmap_xa);
+	entry->mmap_page = ucontext->mmap_xa_page;
+	ucontext->mmap_xa_page += DIV_ROUND_UP(length, PAGE_SIZE);
+	err = __xa_insert(&ucontext->mmap_xa, entry->mmap_page, entry,
+			  GFP_KERNEL);
+	xa_unlock(&ucontext->mmap_xa);
+	if (err){
+		kfree(entry);
+		return EFA_MMAP_INVALID;
+	}
+
+	ibdev_dbg(
+		&dev->ibdev,
+		"mmap: obj[0x%p] addr[%#llx], len[%#llx], key[%#llx] inserted\n",
+		entry->obj, entry->address, entry->length, get_mmap_key(entry));
+
+	return get_mmap_key(entry);
+}
+
+int efa_query_device(struct ib_device *ibdev,
+		     struct ib_device_attr *props,
+		     struct ib_udata *udata)
+{
+	struct efa_com_get_device_attr_result *dev_attr;
+	struct efa_ibv_ex_query_device_resp resp = {};
+	struct efa_dev *dev = to_edev(ibdev);
+	int err;
+
+	if (udata && udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+		ibdev_dbg(ibdev,
+			  "Incompatible ABI params, udata not cleared\n");
+		return -EINVAL;
+	}
+
+	dev_attr = &dev->dev_attr;
+
+	memset(props, 0, sizeof(*props));
+	props->max_mr_size = dev_attr->max_mr_pages * PAGE_SIZE;
+	props->page_size_cap = dev_attr->page_size_cap;
+	props->vendor_id = dev->pdev->vendor;
+	props->vendor_part_id = dev->pdev->device;
+	props->hw_ver = dev->pdev->subsystem_device;
+	props->max_qp = dev_attr->max_qp;
+	props->max_cq = dev_attr->max_cq;
+	props->max_pd = dev_attr->max_pd;
+	props->max_mr = dev_attr->max_mr;
+	props->max_ah = dev_attr->max_ah;
+	props->max_cqe = dev_attr->max_cq_depth;
+	props->max_qp_wr = min_t(u32, dev_attr->max_sq_depth,
+				 dev_attr->max_rq_depth);
+	props->max_send_sge = dev_attr->max_sq_sge;
+	props->max_recv_sge = dev_attr->max_rq_sge;
+
+	if (udata && udata->outlen) {
+		resp.max_sq_sge = dev_attr->max_sq_sge;
+		resp.max_rq_sge = dev_attr->max_rq_sge;
+		resp.max_sq_wr = dev_attr->max_sq_depth;
+		resp.max_rq_wr = dev_attr->max_rq_depth;
+
+		err = ib_copy_to_udata(udata, &resp,
+				       min(sizeof(resp), udata->outlen));
+		if (err) {
+			ibdev_dbg(ibdev,
+				  "Failed to copy udata for query_device\n");
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+int efa_query_port(struct ib_device *ibdev, u8 port,
+		   struct ib_port_attr *props)
+{
+	struct efa_dev *dev = to_edev(ibdev);
+
+	props->lmc = 1;
+
+	props->state = IB_PORT_ACTIVE;
+	props->phys_state = 5;
+	props->gid_tbl_len = 1;
+	props->pkey_tbl_len = 1;
+	props->active_speed = IB_SPEED_EDR;
+	props->active_width = IB_WIDTH_4X;
+	props->max_mtu = ib_mtu_int_to_enum(dev->mtu);
+	props->active_mtu = ib_mtu_int_to_enum(dev->mtu);
+	props->max_msg_sz = dev->mtu;
+	props->max_vl_num = 1;
+
+	return 0;
+}
+
+int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
+		 int qp_attr_mask,
+		 struct ib_qp_init_attr *qp_init_attr)
+{
+	struct efa_dev *dev = to_edev(ibqp->device);
+	struct efa_com_query_qp_params params = {};
+	struct efa_com_query_qp_result result;
+	struct efa_qp *qp = to_eqp(ibqp);
+	int err;
+
+#define EFA_QUERY_QP_SUPP_MASK \
+	(IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
+	 IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP)
+
+	if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
+		ibdev_dbg(&dev->ibdev,
+			  "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
+			  qp_attr_mask, EFA_QUERY_QP_SUPP_MASK);
+		return -EOPNOTSUPP;
+	}
+
+	memset(qp_attr, 0, sizeof(*qp_attr));
+	memset(qp_init_attr, 0, sizeof(*qp_init_attr));
+
+	params.qp_handle = qp->qp_handle;
+	err = efa_com_query_qp(&dev->edev, &params, &result);
+	if (err)
+		return err;
+
+	qp_attr->qp_state = result.qp_state;
+	qp_attr->qkey = result.qkey;
+	qp_attr->sq_psn = result.sq_psn;
+	qp_attr->sq_draining = result.sq_draining;
+	qp_attr->port_num = 1;
+
+	qp_attr->cap.max_send_wr = qp->max_send_wr;
+	qp_attr->cap.max_recv_wr = qp->max_recv_wr;
+	qp_attr->cap.max_send_sge = qp->max_send_sge;
+	qp_attr->cap.max_recv_sge = qp->max_recv_sge;
+	qp_attr->cap.max_inline_data = qp->max_inline_data;
+
+	qp_init_attr->qp_type = ibqp->qp_type;
+	qp_init_attr->recv_cq = ibqp->recv_cq;
+	qp_init_attr->send_cq = ibqp->send_cq;
+	qp_init_attr->qp_context = ibqp->qp_context;
+	qp_init_attr->cap = qp_attr->cap;
+
+	return 0;
+}
+
+int efa_query_gid(struct ib_device *ibdev, u8 port, int index,
+		  union ib_gid *gid)
+{
+	struct efa_dev *dev = to_edev(ibdev);
+
+	memcpy(gid->raw, dev->addr, sizeof(dev->addr));
+
+	return 0;
+}
+
+int efa_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+		   u16 *pkey)
+{
+	if (index > 0)
+		return -EINVAL;
+
+	*pkey = 0xffff;
+	return 0;
+}
+
+static int efa_pd_dealloc(struct efa_dev *dev, u16 pdn)
+{
+	struct efa_com_dealloc_pd_params params = {
+		.pdn = pdn,
+	};
+
+	return efa_com_dealloc_pd(&dev->edev, &params);
+}
+
+int efa_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
+{
+	struct efa_dev *dev = to_edev(ibpd->device);
+	struct efa_ibv_alloc_pd_resp resp = {};
+	struct efa_com_alloc_pd_result result;
+	struct efa_pd *pd = to_epd(ibpd);
+	int err;
+
+	if (udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+		ibdev_dbg(&dev->ibdev,
+			  "Incompatible ABI params, udata not cleared\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	err = efa_com_alloc_pd(&dev->edev, &result);
+	if (err)
+		goto err_out;
+
+	pd->pdn = result.pdn;
+	resp.pdn = result.pdn;
+
+	if (udata->outlen) {
+		err = ib_copy_to_udata(udata, &resp,
+				       min(sizeof(resp), udata->outlen));
+		if (err) {
+			ibdev_dbg(&dev->ibdev,
+				  "Failed to copy udata for alloc_pd\n");
+			goto err_dealloc_pd;
+		}
+	}
+
+	ibdev_dbg(&dev->ibdev, "Allocated pd[%d]\n", pd->pdn);
+
+	return 0;
+
+err_dealloc_pd:
+	efa_pd_dealloc(dev, result.pdn);
+err_out:
+	atomic64_inc(&dev->stats.sw_stats.alloc_pd_err);
+	return err;
+}
+
+void efa_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
+{
+	struct efa_dev *dev = to_edev(ibpd->device);
+	struct efa_pd *pd = to_epd(ibpd);
+
+	if (udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+		ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
+		return;
+	}
+
+	ibdev_dbg(&dev->ibdev, "Dealloc pd[%d]\n", pd->pdn);
+	efa_pd_dealloc(dev, pd->pdn);
+}
+
+static int efa_destroy_qp_handle(struct efa_dev *dev, u32 qp_handle)
+{
+	struct efa_com_destroy_qp_params params = { .qp_handle = qp_handle };
+
+	return efa_com_destroy_qp(&dev->edev, &params);
+}
+
+int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
+{
+	struct efa_dev *dev = to_edev(ibqp->pd->device);
+	struct efa_qp *qp = to_eqp(ibqp);
+	int err;
+
+	if (udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+		ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
+		return -EINVAL;
+	}
+
+	ibdev_dbg(&dev->ibdev, "Destroy qp[%u]\n", ibqp->qp_num);
+	err = efa_destroy_qp_handle(dev, qp->qp_handle);
+	if (err)
+		return err;
+
+	if (qp->rq_cpu_addr) {
+		ibdev_dbg(&dev->ibdev,
+			  "qp->cpu_addr[0x%p] freed: size[%lu], dma[%pad]\n",
+			  qp->rq_cpu_addr, qp->rq_size,
+			  &qp->rq_dma_addr);
+		dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
+				 DMA_TO_DEVICE);
+	}
+
+	kfree(qp);
+	return 0;
+}
+
+static int qp_mmap_entries_setup(struct efa_qp *qp,
+				 struct efa_dev *dev,
+				 struct efa_ucontext *ucontext,
+				 struct efa_com_create_qp_params *params,
+				 struct efa_ibv_create_qp_resp *resp)
+{
+	/*
+	 * Once an entry is inserted it might be mmapped, hence cannot be
+	 * cleaned up until dealloc_ucontext.
+	 */
+	resp->sq_db_mmap_key =
+		mmap_entry_insert(dev, ucontext, qp,
+				  dev->db_bar_addr + resp->sq_db_offset,
+				  PAGE_SIZE, EFA_MMAP_IO_NC);
+	if (resp->sq_db_mmap_key == EFA_MMAP_INVALID)
+		return -ENOMEM;
+
+	resp->sq_db_offset &= ~PAGE_MASK;
+
+	resp->llq_desc_mmap_key =
+		mmap_entry_insert(dev, ucontext, qp,
+				  dev->mem_bar_addr + resp->llq_desc_offset,
+				  PAGE_ALIGN(params->sq_ring_size_in_bytes +
+					     (resp->llq_desc_offset & ~PAGE_MASK)),
+				  EFA_MMAP_IO_WC);
+	if (resp->llq_desc_mmap_key == EFA_MMAP_INVALID)
+		return -ENOMEM;
+
+	resp->llq_desc_offset &= ~PAGE_MASK;
+
+	if (qp->rq_size) {
+		resp->rq_db_mmap_key =
+			mmap_entry_insert(dev, ucontext, qp,
+					  dev->db_bar_addr + resp->rq_db_offset,
+					  PAGE_SIZE, EFA_MMAP_IO_NC);
+		if (resp->rq_db_mmap_key == EFA_MMAP_INVALID)
+			return -ENOMEM;
+
+		resp->rq_db_offset &= ~PAGE_MASK;
+
+		resp->rq_mmap_key =
+			mmap_entry_insert(dev, ucontext, qp,
+					  virt_to_phys(qp->rq_cpu_addr),
+					  qp->rq_size, EFA_MMAP_DMA_PAGE);
+		if (resp->rq_mmap_key == EFA_MMAP_INVALID)
+			return -ENOMEM;
+
+		resp->rq_mmap_size = qp->rq_size;
+	}
+
+	return 0;
+}
+
+static int efa_qp_validate_cap(struct efa_dev *dev,
+			       struct ib_qp_init_attr *init_attr)
+{
+	if (init_attr->cap.max_send_wr > dev->dev_attr.max_sq_depth) {
+		ibdev_dbg(&dev->ibdev,
+			  "qp: requested send wr[%u] exceeds the max[%u]\n",
+			  init_attr->cap.max_send_wr,
+			  dev->dev_attr.max_sq_depth);
+		return -EINVAL;
+	}
+	if (init_attr->cap.max_recv_wr > dev->dev_attr.max_rq_depth) {
+		ibdev_dbg(&dev->ibdev,
+			  "qp: requested receive wr[%u] exceeds the max[%u]\n",
+			  init_attr->cap.max_recv_wr,
+			  dev->dev_attr.max_rq_depth);
+		return -EINVAL;
+	}
+	if (init_attr->cap.max_send_sge > dev->dev_attr.max_sq_sge) {
+		ibdev_dbg(&dev->ibdev,
+			  "qp: requested sge send[%u] exceeds the max[%u]\n",
+			  init_attr->cap.max_send_sge, dev->dev_attr.max_sq_sge);
+		return -EINVAL;
+	}
+	if (init_attr->cap.max_recv_sge > dev->dev_attr.max_rq_sge) {
+		ibdev_dbg(&dev->ibdev,
+			  "qp: requested sge recv[%u] exceeds the max[%u]\n",
+			  init_attr->cap.max_recv_sge, dev->dev_attr.max_rq_sge);
+		return -EINVAL;
+	}
+	if (init_attr->cap.max_inline_data > dev->dev_attr.inline_buf_size) {
+		ibdev_dbg(&dev->ibdev,
+			  "qp: requested inline data[%u] exceeds the max[%u]\n",
+			  init_attr->cap.max_inline_data,
+			  dev->dev_attr.inline_buf_size);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int efa_qp_validate_attr(struct efa_dev *dev,
+				struct ib_qp_init_attr *init_attr)
+{
+	if (init_attr->qp_type != IB_QPT_DRIVER &&
+	    init_attr->qp_type != IB_QPT_UD) {
+		ibdev_dbg(&dev->ibdev,
+			  "Unsupported qp type %d\n", init_attr->qp_type);
+		return -EOPNOTSUPP;
+	}
+
+	if (init_attr->srq) {
+		ibdev_dbg(&dev->ibdev, "SRQ is not supported\n");
+		return -EOPNOTSUPP;
+	}
+
+	if (init_attr->create_flags) {
+		ibdev_dbg(&dev->ibdev, "Unsupported create flags\n");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+struct ib_qp *efa_create_qp(struct ib_pd *ibpd,
+			    struct ib_qp_init_attr *init_attr,
+			    struct ib_udata *udata)
+{
+	struct efa_com_create_qp_params create_qp_params = {};
+	struct efa_com_create_qp_result create_qp_resp;
+	struct efa_dev *dev = to_edev(ibpd->device);
+	struct efa_ibv_create_qp_resp resp = {};
+	struct efa_ibv_create_qp cmd = {};
+	bool rq_entry_inserted = false;
+	struct efa_ucontext *ucontext;
+	struct efa_qp *qp;
+	int err;
+
+	ucontext = rdma_udata_to_drv_context(udata, struct efa_ucontext,
+					     ibucontext);
+
+	err = efa_qp_validate_cap(dev, init_attr);
+	if (err)
+		goto err_out;
+
+	err = efa_qp_validate_attr(dev, init_attr);
+	if (err)
+		goto err_out;
+
+	if (!field_avail(cmd, driver_qp_type, udata->inlen)) {
+		ibdev_dbg(&dev->ibdev,
+			  "Incompatible ABI params, no input udata\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	if (udata->inlen > sizeof(cmd) &&
+	    !ib_is_udata_cleared(udata, sizeof(cmd),
+				 udata->inlen - sizeof(cmd))) {
+		ibdev_dbg(&dev->ibdev,
+			  "Incompatible ABI params, unknown fields in udata\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	err = ib_copy_from_udata(&cmd, udata,
+				 min(sizeof(cmd), udata->inlen));
+	if (err) {
+		ibdev_dbg(&dev->ibdev,
+			  "Cannot copy udata for create_qp\n");
+		goto err_out;
+	}
+
+	if (cmd.comp_mask) {
+		ibdev_dbg(&dev->ibdev,
+			  "Incompatible ABI params, unknown fields in udata\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	qp = kzalloc(sizeof(*qp), GFP_KERNEL);
+	if (!qp) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	create_qp_params.uarn = ucontext->uarn;
+	create_qp_params.pd = to_epd(ibpd)->pdn;
+
+	if (init_attr->qp_type == IB_QPT_UD) {
+		create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_UD;
+	} else if (cmd.driver_qp_type == EFA_QP_DRIVER_TYPE_SRD) {
+		create_qp_params.qp_type = EFA_ADMIN_QP_TYPE_SRD;
+	} else {
+		ibdev_dbg(&dev->ibdev,
+			  "Unsupported qp type %d driver qp type %d\n",
+			  init_attr->qp_type, cmd.driver_qp_type);
+		err = -EOPNOTSUPP;
+		goto err_free_qp;
+	}
+
+	ibdev_dbg(&dev->ibdev, "Create QP: qp type %d driver qp type %#x\n",
+		  init_attr->qp_type, cmd.driver_qp_type);
+	create_qp_params.send_cq_idx = to_ecq(init_attr->send_cq)->cq_idx;
+	create_qp_params.recv_cq_idx = to_ecq(init_attr->recv_cq)->cq_idx;
+	create_qp_params.sq_depth = init_attr->cap.max_send_wr;
+	create_qp_params.sq_ring_size_in_bytes = cmd.sq_ring_size;
+
+	create_qp_params.rq_depth = init_attr->cap.max_recv_wr;
+	create_qp_params.rq_ring_size_in_bytes = cmd.rq_ring_size;
+	qp->rq_size = PAGE_ALIGN(create_qp_params.rq_ring_size_in_bytes);
+	if (qp->rq_size) {
+		qp->rq_cpu_addr = efa_zalloc_mapped(dev, &qp->rq_dma_addr,
+						    qp->rq_size, DMA_TO_DEVICE);
+		if (!qp->rq_cpu_addr) {
+			err = -ENOMEM;
+			goto err_free_qp;
+		}
+
+		ibdev_dbg(&dev->ibdev,
+			  "qp->cpu_addr[0x%p] allocated: size[%lu], dma[%pad]\n",
+			  qp->rq_cpu_addr, qp->rq_size, &qp->rq_dma_addr);
+		create_qp_params.rq_base_addr = qp->rq_dma_addr;
+	}
+
+	err = efa_com_create_qp(&dev->edev, &create_qp_params,
+				&create_qp_resp);
+	if (err)
+		goto err_free_mapped;
+
+	resp.sq_db_offset = create_qp_resp.sq_db_offset;
+	resp.rq_db_offset = create_qp_resp.rq_db_offset;
+	resp.llq_desc_offset = create_qp_resp.llq_descriptors_offset;
+	resp.send_sub_cq_idx = create_qp_resp.send_sub_cq_idx;
+	resp.recv_sub_cq_idx = create_qp_resp.recv_sub_cq_idx;
+
+	err = qp_mmap_entries_setup(qp, dev, ucontext, &create_qp_params,
+				    &resp);
+	if (err)
+		goto err_destroy_qp;
+
+	rq_entry_inserted = true;
+	qp->qp_handle = create_qp_resp.qp_handle;
+	qp->ibqp.qp_num = create_qp_resp.qp_num;
+	qp->ibqp.qp_type = init_attr->qp_type;
+	qp->max_send_wr = init_attr->cap.max_send_wr;
+	qp->max_recv_wr = init_attr->cap.max_recv_wr;
+	qp->max_send_sge = init_attr->cap.max_send_sge;
+	qp->max_recv_sge = init_attr->cap.max_recv_sge;
+	qp->max_inline_data = init_attr->cap.max_inline_data;
+
+	if (udata->outlen) {
+		err = ib_copy_to_udata(udata, &resp,
+				       min(sizeof(resp), udata->outlen));
+		if (err) {
+			ibdev_dbg(&dev->ibdev,
+				  "Failed to copy udata for qp[%u]\n",
+				  create_qp_resp.qp_num);
+			goto err_destroy_qp;
+		}
+	}
+
+	ibdev_dbg(&dev->ibdev, "Created qp[%d]\n", qp->ibqp.qp_num);
+
+	return &qp->ibqp;
+
+err_destroy_qp:
+	efa_destroy_qp_handle(dev, create_qp_resp.qp_handle);
+err_free_mapped:
+	if (qp->rq_size) {
+		dma_unmap_single(&dev->pdev->dev, qp->rq_dma_addr, qp->rq_size,
+				 DMA_TO_DEVICE);
+		if (!rq_entry_inserted)
+			free_pages_exact(qp->rq_cpu_addr, qp->rq_size);
+	}
+err_free_qp:
+	kfree(qp);
+err_out:
+	atomic64_inc(&dev->stats.sw_stats.create_qp_err);
+	return ERR_PTR(err);
+}
+
+static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
+				  struct ib_qp_attr *qp_attr, int qp_attr_mask,
+				  enum ib_qp_state cur_state,
+				  enum ib_qp_state new_state)
+{
+#define EFA_MODIFY_QP_SUPP_MASK \
+	(IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
+	 IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN)
+
+	if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
+		ibdev_dbg(&dev->ibdev,
+			  "Unsupported qp_attr_mask[%#x] supported[%#x]\n",
+			  qp_attr_mask, EFA_MODIFY_QP_SUPP_MASK);
+		return -EOPNOTSUPP;
+	}
+
+	if (!ib_modify_qp_is_ok(cur_state, new_state, IB_QPT_UD,
+				qp_attr_mask)) {
+		ibdev_dbg(&dev->ibdev, "Invalid modify QP parameters\n");
+		return -EINVAL;
+	}
+
+	if ((qp_attr_mask & IB_QP_PORT) && qp_attr->port_num != 1) {
+		ibdev_dbg(&dev->ibdev, "Can't change port num\n");
+		return -EOPNOTSUPP;
+	}
+
+	if ((qp_attr_mask & IB_QP_PKEY_INDEX) && qp_attr->pkey_index) {
+		ibdev_dbg(&dev->ibdev, "Can't change pkey index\n");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
+		  int qp_attr_mask, struct ib_udata *udata)
+{
+	struct efa_dev *dev = to_edev(ibqp->device);
+	struct efa_com_modify_qp_params params = {};
+	struct efa_qp *qp = to_eqp(ibqp);
+	enum ib_qp_state cur_state;
+	enum ib_qp_state new_state;
+	int err;
+
+	if (udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+		ibdev_dbg(&dev->ibdev,
+			  "Incompatible ABI params, udata not cleared\n");
+		return -EINVAL;
+	}
+
+	cur_state = qp_attr_mask & IB_QP_CUR_STATE ? qp_attr->cur_qp_state :
+						     qp->state;
+	new_state = qp_attr_mask & IB_QP_STATE ? qp_attr->qp_state : cur_state;
+
+	err = efa_modify_qp_validate(dev, qp, qp_attr, qp_attr_mask, cur_state,
+				     new_state);
+	if (err)
+		return err;
+
+	params.qp_handle = qp->qp_handle;
+
+	if (qp_attr_mask & IB_QP_STATE) {
+		params.modify_mask |= BIT(EFA_ADMIN_QP_STATE_BIT) |
+				      BIT(EFA_ADMIN_CUR_QP_STATE_BIT);
+		params.cur_qp_state = qp_attr->cur_qp_state;
+		params.qp_state = qp_attr->qp_state;
+	}
+
+	if (qp_attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY) {
+		params.modify_mask |=
+			BIT(EFA_ADMIN_SQ_DRAINED_ASYNC_NOTIFY_BIT);
+		params.sq_drained_async_notify = qp_attr->en_sqd_async_notify;
+	}
+
+	if (qp_attr_mask & IB_QP_QKEY) {
+		params.modify_mask |= BIT(EFA_ADMIN_QKEY_BIT);
+		params.qkey = qp_attr->qkey;
+	}
+
+	if (qp_attr_mask & IB_QP_SQ_PSN) {
+		params.modify_mask |= BIT(EFA_ADMIN_SQ_PSN_BIT);
+		params.sq_psn = qp_attr->sq_psn;
+	}
+
+	err = efa_com_modify_qp(&dev->edev, &params);
+	if (err)
+		return err;
+
+	qp->state = new_state;
+
+	return 0;
+}
+
+static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
+{
+	struct efa_com_destroy_cq_params params = { .cq_idx = cq_idx };
+
+	return efa_com_destroy_cq(&dev->edev, &params);
+}
+
+int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+{
+	struct efa_dev *dev = to_edev(ibcq->device);
+	struct efa_cq *cq = to_ecq(ibcq);
+	int err;
+
+	if (udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+		ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
+		return -EINVAL;
+	}
+
+	ibdev_dbg(&dev->ibdev,
+		  "Destroy cq[%d] virt[0x%p] freed: size[%lu], dma[%pad]\n",
+		  cq->cq_idx, cq->cpu_addr, cq->size, &cq->dma_addr);
+
+	err = efa_destroy_cq_idx(dev, cq->cq_idx);
+	if (err)
+		return err;
+
+	dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
+			 DMA_FROM_DEVICE);
+
+	kfree(cq);
+	return 0;
+}
+
+static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
+				 struct efa_ibv_create_cq_resp *resp)
+{
+	resp->q_mmap_size = cq->size;
+	resp->q_mmap_key = mmap_entry_insert(dev, cq->ucontext, cq,
+					     virt_to_phys(cq->cpu_addr),
+					     cq->size, EFA_MMAP_DMA_PAGE);
+	if (resp->q_mmap_key == EFA_MMAP_INVALID)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static struct ib_cq *do_create_cq(struct ib_device *ibdev, int entries,
+				  int vector, struct ib_ucontext *ibucontext,
+				  struct ib_udata *udata)
+{
+	struct efa_ibv_create_cq_resp resp = {};
+	struct efa_com_create_cq_params params;
+	struct efa_com_create_cq_result result;
+	struct efa_dev *dev = to_edev(ibdev);
+	struct efa_ibv_create_cq cmd = {};
+	bool cq_entry_inserted = false;
+	struct efa_cq *cq;
+	int err;
+
+	ibdev_dbg(ibdev, "create_cq entries %d\n", entries);
+
+	if (entries < 1 || entries > dev->dev_attr.max_cq_depth) {
+		ibdev_dbg(ibdev,
+			  "cq: requested entries[%u] non-positive or greater than max[%u]\n",
+			  entries, dev->dev_attr.max_cq_depth);
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	if (!field_avail(cmd, num_sub_cqs, udata->inlen)) {
+		ibdev_dbg(ibdev,
+			  "Incompatible ABI params, no input udata\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	if (udata->inlen > sizeof(cmd) &&
+	    !ib_is_udata_cleared(udata, sizeof(cmd),
+				 udata->inlen - sizeof(cmd))) {
+		ibdev_dbg(ibdev,
+			  "Incompatible ABI params, unknown fields in udata\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	err = ib_copy_from_udata(&cmd, udata,
+				 min(sizeof(cmd), udata->inlen));
+	if (err) {
+		ibdev_dbg(ibdev, "Cannot copy udata for create_cq\n");
+		goto err_out;
+	}
+
+	if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_50)) {
+		ibdev_dbg(ibdev,
+			  "Incompatible ABI params, unknown fields in udata\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	if (!cmd.cq_entry_size) {
+		ibdev_dbg(ibdev,
+			  "Invalid entry size [%u]\n", cmd.cq_entry_size);
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	if (cmd.num_sub_cqs != dev->dev_attr.sub_cqs_per_cq) {
+		ibdev_dbg(ibdev,
+			  "Invalid number of sub cqs[%u] expected[%u]\n",
+			  cmd.num_sub_cqs, dev->dev_attr.sub_cqs_per_cq);
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	cq = kzalloc(sizeof(*cq), GFP_KERNEL);
+	if (!cq) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	cq->ucontext = to_eucontext(ibucontext);
+	cq->size = PAGE_ALIGN(cmd.cq_entry_size * entries * cmd.num_sub_cqs);
+	cq->cpu_addr = efa_zalloc_mapped(dev, &cq->dma_addr, cq->size,
+					 DMA_FROM_DEVICE);
+	if (!cq->cpu_addr) {
+		err = -ENOMEM;
+		goto err_free_cq;
+	}
+
+	params.uarn = cq->ucontext->uarn;
+	params.cq_depth = entries;
+	params.dma_addr = cq->dma_addr;
+	params.entry_size_in_bytes = cmd.cq_entry_size;
+	params.num_sub_cqs = cmd.num_sub_cqs;
+	err = efa_com_create_cq(&dev->edev, &params, &result);
+	if (err)
+		goto err_free_mapped;
+
+	resp.cq_idx = result.cq_idx;
+	cq->cq_idx = result.cq_idx;
+	cq->ibcq.cqe = result.actual_depth;
+	WARN_ON_ONCE(entries != result.actual_depth);
+
+	err = cq_mmap_entries_setup(dev, cq, &resp);
+	if (err) {
+		ibdev_dbg(ibdev,
+			  "Could not setup cq[%u] mmap entries\n", cq->cq_idx);
+		goto err_destroy_cq;
+	}
+
+	cq_entry_inserted = true;
+
+	if (udata->outlen) {
+		err = ib_copy_to_udata(udata, &resp,
+				       min(sizeof(resp), udata->outlen));
+		if (err) {
+			ibdev_dbg(ibdev,
+				  "Failed to copy udata for create_cq\n");
+			goto err_destroy_cq;
+		}
+	}
+
+	ibdev_dbg(ibdev,
+		  "Created cq[%d], cq depth[%u]. dma[%pad] virt[0x%p]\n",
+		  cq->cq_idx, result.actual_depth, &cq->dma_addr, cq->cpu_addr);
+
+	return &cq->ibcq;
+
+err_destroy_cq:
+	efa_destroy_cq_idx(dev, cq->cq_idx);
+err_free_mapped:
+	dma_unmap_single(&dev->pdev->dev, cq->dma_addr, cq->size,
+			 DMA_FROM_DEVICE);
+	if (!cq_entry_inserted)
+		free_pages_exact(cq->cpu_addr, cq->size);
+err_free_cq:
+	kfree(cq);
+err_out:
+	atomic64_inc(&dev->stats.sw_stats.create_cq_err);
+	return ERR_PTR(err);
+}
+
+struct ib_cq *efa_create_cq(struct ib_device *ibdev,
+			    const struct ib_cq_init_attr *attr,
+			    struct ib_udata *udata)
+{
+	struct efa_ucontext *ucontext = rdma_udata_to_drv_context(udata,
+								  struct efa_ucontext,
+								  ibucontext);
+
+	return do_create_cq(ibdev, attr->cqe, attr->comp_vector,
+			    &ucontext->ibucontext, udata);
+}
+
+static int umem_to_page_list(struct efa_dev *dev,
+			     struct ib_umem *umem,
+			     u64 *page_list,
+			     u32 hp_cnt,
+			     u8 hp_shift)
+{
+	u32 pages_in_hp = BIT(hp_shift - PAGE_SHIFT);
+	struct sg_dma_page_iter sg_iter;
+	unsigned int page_idx = 0;
+	unsigned int hp_idx = 0;
+
+	ibdev_dbg(&dev->ibdev, "hp_cnt[%u], pages_in_hp[%u]\n",
+		  hp_cnt, pages_in_hp);
+
+	for_each_sg_dma_page(umem->sg_head.sgl, &sg_iter, umem->nmap, 0) {
+		if (page_idx % pages_in_hp == 0) {
+			page_list[hp_idx] = sg_page_iter_dma_address(&sg_iter);
+			hp_idx++;
+		}
+
+		page_idx++;
+	}
+
+	return 0;
+}
+
+static struct scatterlist *efa_vmalloc_buf_to_sg(u64 *buf, int page_cnt)
+{
+	struct scatterlist *sglist;
+	struct page *pg;
+	int i;
+
+	sglist = kcalloc(page_cnt, sizeof(*sglist), GFP_KERNEL);
+	if (!sglist)
+		return NULL;
+	sg_init_table(sglist, page_cnt);
+	for (i = 0; i < page_cnt; i++) {
+		pg = vmalloc_to_page(buf);
+		if (!pg)
+			goto err;
+		sg_set_page(&sglist[i], pg, PAGE_SIZE, 0);
+		buf += PAGE_SIZE / sizeof(*buf);
+	}
+	return sglist;
+
+err:
+	kfree(sglist);
+	return NULL;
+}
+
+/*
+ * create a chunk list of physical pages dma addresses from the supplied
+ * scatter gather list
+ */
+static int pbl_chunk_list_create(struct efa_dev *dev, struct pbl_context *pbl)
+{
+	unsigned int entry, payloads_in_sg, chunk_list_size, chunk_idx, payload_idx;
+	struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
+	int page_cnt = pbl->phys.indirect.pbl_buf_size_in_pages;
+	struct scatterlist *pages_sgl = pbl->phys.indirect.sgl;
+	int sg_dma_cnt = pbl->phys.indirect.sg_dma_cnt;
+	struct efa_com_ctrl_buff_info *ctrl_buf;
+	u64 *cur_chunk_buf, *prev_chunk_buf;
+	struct scatterlist *sg;
+	dma_addr_t dma_addr;
+	int i;
+
+	/* allocate a chunk list that consists of 4KB chunks */
+	chunk_list_size = DIV_ROUND_UP(page_cnt, EFA_PTRS_PER_CHUNK);
+
+	chunk_list->size = chunk_list_size;
+	chunk_list->chunks = kcalloc(chunk_list_size,
+				     sizeof(*chunk_list->chunks),
+				     GFP_KERNEL);
+	if (!chunk_list->chunks)
+		return -ENOMEM;
+
+	ibdev_dbg(&dev->ibdev,
+		  "chunk_list_size[%u] - pages[%u]\n", chunk_list_size,
+		  page_cnt);
+
+	/* allocate chunk buffers: */
+	for (i = 0; i < chunk_list_size; i++) {
+		chunk_list->chunks[i].buf = kzalloc(EFA_CHUNK_SIZE, GFP_KERNEL);
+		if (!chunk_list->chunks[i].buf)
+			goto chunk_list_dealloc;
+
+		chunk_list->chunks[i].length = EFA_CHUNK_USED_SIZE;
+	}
+	chunk_list->chunks[chunk_list_size - 1].length =
+		((page_cnt % EFA_PTRS_PER_CHUNK) * EFA_CHUNK_PAYLOAD_PTR_SIZE) +
+			EFA_CHUNK_PTR_SIZE;
+
+	/* fill the dma addresses of sg list pages to chunks: */
+	chunk_idx = 0;
+	payload_idx = 0;
+	cur_chunk_buf = chunk_list->chunks[0].buf;
+	for_each_sg(pages_sgl, sg, sg_dma_cnt, entry) {
+		payloads_in_sg = sg_dma_len(sg) >> EFA_CHUNK_PAYLOAD_SHIFT;
+		for (i = 0; i < payloads_in_sg; i++) {
+			cur_chunk_buf[payload_idx++] =
+				(sg_dma_address(sg) & ~(EFA_CHUNK_PAYLOAD_SIZE - 1)) +
+				(EFA_CHUNK_PAYLOAD_SIZE * i);
+
+			if (payload_idx == EFA_PTRS_PER_CHUNK) {
+				chunk_idx++;
+				cur_chunk_buf = chunk_list->chunks[chunk_idx].buf;
+				payload_idx = 0;
+			}
+		}
+	}
+
+	/* map chunks to dma and fill chunks next ptrs */
+	for (i = chunk_list_size - 1; i >= 0; i--) {
+		dma_addr = dma_map_single(&dev->pdev->dev,
+					  chunk_list->chunks[i].buf,
+					  chunk_list->chunks[i].length,
+					  DMA_TO_DEVICE);
+		if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
+			ibdev_err(&dev->ibdev,
+				  "chunk[%u] dma_map_failed\n", i);
+			goto chunk_list_unmap;
+		}
+
+		chunk_list->chunks[i].dma_addr = dma_addr;
+		ibdev_dbg(&dev->ibdev,
+			  "chunk[%u] mapped at [%pad]\n", i, &dma_addr);
+
+		if (!i)
+			break;
+
+		prev_chunk_buf = chunk_list->chunks[i - 1].buf;
+
+		ctrl_buf = (struct efa_com_ctrl_buff_info *)
+				&prev_chunk_buf[EFA_PTRS_PER_CHUNK];
+		ctrl_buf->length = chunk_list->chunks[i].length;
+
+		efa_com_set_dma_addr(dma_addr,
+				     &ctrl_buf->address.mem_addr_high,
+				     &ctrl_buf->address.mem_addr_low);
+	}
+
+	return 0;
+
+chunk_list_unmap:
+	for (; i < chunk_list_size; i++) {
+		dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
+				 chunk_list->chunks[i].length, DMA_TO_DEVICE);
+	}
+chunk_list_dealloc:
+	for (i = 0; i < chunk_list_size; i++)
+		kfree(chunk_list->chunks[i].buf);
+
+	kfree(chunk_list->chunks);
+	return -ENOMEM;
+}
+
+static void pbl_chunk_list_destroy(struct efa_dev *dev, struct pbl_context *pbl)
+{
+	struct pbl_chunk_list *chunk_list = &pbl->phys.indirect.chunk_list;
+	int i;
+
+	for (i = 0; i < chunk_list->size; i++) {
+		dma_unmap_single(&dev->pdev->dev, chunk_list->chunks[i].dma_addr,
+				 chunk_list->chunks[i].length, DMA_TO_DEVICE);
+		kfree(chunk_list->chunks[i].buf);
+	}
+
+	kfree(chunk_list->chunks);
+}
+
+/* initialize pbl continuous mode: map pbl buffer to a dma address. */
+static int pbl_continuous_initialize(struct efa_dev *dev,
+				     struct pbl_context *pbl)
+{
+	dma_addr_t dma_addr;
+
+	dma_addr = dma_map_single(&dev->pdev->dev, pbl->pbl_buf,
+				  pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
+	if (dma_mapping_error(&dev->pdev->dev, dma_addr)) {
+		ibdev_err(&dev->ibdev, "Unable to map pbl to DMA address\n");
+		return -ENOMEM;
+	}
+
+	pbl->phys.continuous.dma_addr = dma_addr;
+	ibdev_dbg(&dev->ibdev,
+		  "pbl continuous - dma_addr = %pad, size[%u]\n",
+		  &dma_addr, pbl->pbl_buf_size_in_bytes);
+
+	return 0;
+}
+
+/*
+ * initialize pbl indirect mode:
+ * create a chunk list out of the dma addresses of the physical pages of
+ * pbl buffer.
+ */
+static int pbl_indirect_initialize(struct efa_dev *dev, struct pbl_context *pbl)
+{
+	u32 size_in_pages = DIV_ROUND_UP(pbl->pbl_buf_size_in_bytes, PAGE_SIZE);
+	struct scatterlist *sgl;
+	int sg_dma_cnt, err;
+
+	BUILD_BUG_ON(EFA_CHUNK_PAYLOAD_SIZE > PAGE_SIZE);
+	sgl = efa_vmalloc_buf_to_sg(pbl->pbl_buf, size_in_pages);
+	if (!sgl)
+		return -ENOMEM;
+
+	sg_dma_cnt = dma_map_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
+	if (!sg_dma_cnt) {
+		err = -EINVAL;
+		goto err_map;
+	}
+
+	pbl->phys.indirect.pbl_buf_size_in_pages = size_in_pages;
+	pbl->phys.indirect.sgl = sgl;
+	pbl->phys.indirect.sg_dma_cnt = sg_dma_cnt;
+	err = pbl_chunk_list_create(dev, pbl);
+	if (err) {
+		ibdev_dbg(&dev->ibdev,
+			  "chunk_list creation failed[%d]\n", err);
+		goto err_chunk;
+	}
+
+	ibdev_dbg(&dev->ibdev,
+		  "pbl indirect - size[%u], chunks[%u]\n",
+		  pbl->pbl_buf_size_in_bytes,
+		  pbl->phys.indirect.chunk_list.size);
+
+	return 0;
+
+err_chunk:
+	dma_unmap_sg(&dev->pdev->dev, sgl, size_in_pages, DMA_TO_DEVICE);
+err_map:
+	kfree(sgl);
+	return err;
+}
+
+static void pbl_indirect_terminate(struct efa_dev *dev, struct pbl_context *pbl)
+{
+	pbl_chunk_list_destroy(dev, pbl);
+	dma_unmap_sg(&dev->pdev->dev, pbl->phys.indirect.sgl,
+		     pbl->phys.indirect.pbl_buf_size_in_pages, DMA_TO_DEVICE);
+	kfree(pbl->phys.indirect.sgl);
+}
+
+/* create a page buffer list from a mapped user memory region */
+static int pbl_create(struct efa_dev *dev,
+		      struct pbl_context *pbl,
+		      struct ib_umem *umem,
+		      int hp_cnt,
+		      u8 hp_shift)
+{
+	int err;
+
+	pbl->pbl_buf_size_in_bytes = hp_cnt * EFA_CHUNK_PAYLOAD_PTR_SIZE;
+	pbl->pbl_buf = kzalloc(pbl->pbl_buf_size_in_bytes,
+			       GFP_KERNEL | __GFP_NOWARN);
+	if (pbl->pbl_buf) {
+		pbl->physically_continuous = 1;
+		err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
+					hp_shift);
+		if (err)
+			goto err_continuous;
+		err = pbl_continuous_initialize(dev, pbl);
+		if (err)
+			goto err_continuous;
+	} else {
+		pbl->physically_continuous = 0;
+		pbl->pbl_buf = vzalloc(pbl->pbl_buf_size_in_bytes);
+		if (!pbl->pbl_buf)
+			return -ENOMEM;
+
+		err = umem_to_page_list(dev, umem, pbl->pbl_buf, hp_cnt,
+					hp_shift);
+		if (err)
+			goto err_indirect;
+		err = pbl_indirect_initialize(dev, pbl);
+		if (err)
+			goto err_indirect;
+	}
+
+	ibdev_dbg(&dev->ibdev,
+		  "user_pbl_created: user_pages[%u], continuous[%u]\n",
+		  hp_cnt, pbl->physically_continuous);
+
+	return 0;
+
+err_continuous:
+	kfree(pbl->pbl_buf);
+	return err;
+err_indirect:
+	vfree(pbl->pbl_buf);
+	return err;
+}
+
+static void pbl_destroy(struct efa_dev *dev, struct pbl_context *pbl)
+{
+	if (pbl->physically_continuous) {
+		dma_unmap_single(&dev->pdev->dev, pbl->phys.continuous.dma_addr,
+				 pbl->pbl_buf_size_in_bytes, DMA_TO_DEVICE);
+		kfree(pbl->pbl_buf);
+	} else {
+		pbl_indirect_terminate(dev, pbl);
+		vfree(pbl->pbl_buf);
+	}
+}
+
+static int efa_create_inline_pbl(struct efa_dev *dev, struct efa_mr *mr,
+				 struct efa_com_reg_mr_params *params)
+{
+	int err;
+
+	params->inline_pbl = 1;
+	err = umem_to_page_list(dev, mr->umem, params->pbl.inline_pbl_array,
+				params->page_num, params->page_shift);
+	if (err)
+		return err;
+
+	ibdev_dbg(&dev->ibdev,
+		  "inline_pbl_array - pages[%u]\n", params->page_num);
+
+	return 0;
+}
+
+static int efa_create_pbl(struct efa_dev *dev,
+			  struct pbl_context *pbl,
+			  struct efa_mr *mr,
+			  struct efa_com_reg_mr_params *params)
+{
+	int err;
+
+	err = pbl_create(dev, pbl, mr->umem, params->page_num,
+			 params->page_shift);
+	if (err) {
+		ibdev_dbg(&dev->ibdev, "Failed to create pbl[%d]\n", err);
+		return err;
+	}
+
+	params->inline_pbl = 0;
+	params->indirect = !pbl->physically_continuous;
+	if (pbl->physically_continuous) {
+		params->pbl.pbl.length = pbl->pbl_buf_size_in_bytes;
+
+		efa_com_set_dma_addr(pbl->phys.continuous.dma_addr,
+				     &params->pbl.pbl.address.mem_addr_high,
+				     &params->pbl.pbl.address.mem_addr_low);
+	} else {
+		params->pbl.pbl.length =
+			pbl->phys.indirect.chunk_list.chunks[0].length;
+
+		efa_com_set_dma_addr(pbl->phys.indirect.chunk_list.chunks[0].dma_addr,
+				     &params->pbl.pbl.address.mem_addr_high,
+				     &params->pbl.pbl.address.mem_addr_low);
+	}
+
+	return 0;
+}
+
+static void efa_cont_pages(struct ib_umem *umem, u64 addr,
+			   unsigned long max_page_shift,
+			   int *count, u8 *shift, u32 *ncont)
+{
+	struct scatterlist *sg;
+	u64 base = ~0, p = 0;
+	unsigned long tmp;
+	unsigned long m;
+	u64 len, pfn;
+	int i = 0;
+	int entry;
+
+	addr = addr >> PAGE_SHIFT;
+	tmp = (unsigned long)addr;
+	m = find_first_bit(&tmp, BITS_PER_LONG);
+	if (max_page_shift)
+		m = min_t(unsigned long, max_page_shift - PAGE_SHIFT, m);
+
+	for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
+		len = DIV_ROUND_UP(sg_dma_len(sg), PAGE_SIZE);
+		pfn = sg_dma_address(sg) >> PAGE_SHIFT;
+		if (base + p != pfn) {
+			/*
+			 * If either the offset or the new
+			 * base are unaligned update m
+			 */
+			tmp = (unsigned long)(pfn | p);
+			if (!IS_ALIGNED(tmp, 1 << m))
+				m = find_first_bit(&tmp, BITS_PER_LONG);
+
+			base = pfn;
+			p = 0;
+		}
+
+		p += len;
+		i += len;
+	}
+
+	if (i) {
+		m = min_t(unsigned long, ilog2(roundup_pow_of_two(i)), m);
+		*ncont = DIV_ROUND_UP(i, (1 << m));
+	} else {
+		m = 0;
+		*ncont = 0;
+	}
+
+	*shift = PAGE_SHIFT + m;
+	*count = i;
+}
+
+struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
+			 u64 virt_addr, int access_flags,
+			 struct ib_udata *udata)
+{
+	struct efa_dev *dev = to_edev(ibpd->device);
+	struct efa_com_reg_mr_params params = {};
+	struct efa_com_reg_mr_result result = {};
+	unsigned long max_page_shift;
+	struct pbl_context pbl;
+	struct efa_mr *mr;
+	int inline_size;
+	int npages;
+	int err;
+
+	if (udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, sizeof(udata->inlen))) {
+		ibdev_dbg(&dev->ibdev,
+			  "Incompatible ABI params, udata not cleared\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	if (access_flags & ~EFA_SUPPORTED_ACCESS_FLAGS) {
+		ibdev_dbg(&dev->ibdev,
+			  "Unsupported access flags[%#x], supported[%#x]\n",
+			  access_flags, EFA_SUPPORTED_ACCESS_FLAGS);
+		err = -EOPNOTSUPP;
+		goto err_out;
+	}
+
+	mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+	if (!mr) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	mr->umem = ib_umem_get(udata, start, length, access_flags, 0);
+	if (IS_ERR(mr->umem)) {
+		err = PTR_ERR(mr->umem);
+		ibdev_dbg(&dev->ibdev,
+			  "Failed to pin and map user space memory[%d]\n", err);
+		goto err_free;
+	}
+
+	params.pd = to_epd(ibpd)->pdn;
+	params.iova = virt_addr;
+	params.mr_length_in_bytes = length;
+	params.permissions = access_flags & 0x1;
+	max_page_shift = fls64(dev->dev_attr.page_size_cap);
+
+	efa_cont_pages(mr->umem, start, max_page_shift, &npages,
+		       &params.page_shift, &params.page_num);
+	ibdev_dbg(&dev->ibdev,
+		  "start %#llx length %#llx npages %d params.page_shift %u params.page_num %u\n",
+		  start, length, npages, params.page_shift, params.page_num);
+
+	inline_size = ARRAY_SIZE(params.pbl.inline_pbl_array);
+	if (params.page_num <= inline_size) {
+		err = efa_create_inline_pbl(dev, mr, &params);
+		if (err)
+			goto err_unmap;
+
+		err = efa_com_register_mr(&dev->edev, &params, &result);
+		if (err)
+			goto err_unmap;
+	} else {
+		err = efa_create_pbl(dev, &pbl, mr, &params);
+		if (err)
+			goto err_unmap;
+
+		err = efa_com_register_mr(&dev->edev, &params, &result);
+		pbl_destroy(dev, &pbl);
+
+		if (err)
+			goto err_unmap;
+	}
+
+	mr->ibmr.lkey = result.l_key;
+	mr->ibmr.rkey = result.r_key;
+	mr->ibmr.length = length;
+	ibdev_dbg(&dev->ibdev, "Registered mr[%d]\n", mr->ibmr.lkey);
+
+	return &mr->ibmr;
+
+err_unmap:
+	ib_umem_release(mr->umem);
+err_free:
+	kfree(mr);
+err_out:
+	atomic64_inc(&dev->stats.sw_stats.reg_mr_err);
+	return ERR_PTR(err);
+}
+
+int efa_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata)
+{
+	struct efa_dev *dev = to_edev(ibmr->device);
+	struct efa_com_dereg_mr_params params;
+	struct efa_mr *mr = to_emr(ibmr);
+	int err;
+
+	if (udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+		ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
+		return -EINVAL;
+	}
+
+	ibdev_dbg(&dev->ibdev, "Deregister mr[%d]\n", ibmr->lkey);
+
+	if (mr->umem) {
+		params.l_key = mr->ibmr.lkey;
+		err = efa_com_dereg_mr(&dev->edev, &params);
+		if (err)
+			return err;
+		ib_umem_release(mr->umem);
+	}
+
+	kfree(mr);
+
+	return 0;
+}
+
+int efa_get_port_immutable(struct ib_device *ibdev, u8 port_num,
+			   struct ib_port_immutable *immutable)
+{
+	struct ib_port_attr attr;
+	int err;
+
+	err = ib_query_port(ibdev, port_num, &attr);
+	if (err) {
+		ibdev_dbg(ibdev, "Couldn't query port err[%d]\n", err);
+		return err;
+	}
+
+	immutable->pkey_tbl_len = attr.pkey_tbl_len;
+	immutable->gid_tbl_len = attr.gid_tbl_len;
+
+	return 0;
+}
+
+static int efa_dealloc_uar(struct efa_dev *dev, u16 uarn)
+{
+	struct efa_com_dealloc_uar_params params = {
+		.uarn = uarn,
+	};
+
+	return efa_com_dealloc_uar(&dev->edev, &params);
+}
+
+int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
+{
+	struct efa_ucontext *ucontext = to_eucontext(ibucontext);
+	struct efa_dev *dev = to_edev(ibucontext->device);
+	struct efa_ibv_alloc_ucontext_resp resp = {};
+	struct efa_com_alloc_uar_result result;
+	int err;
+
+	/*
+	 * it's fine if the driver does not know all request fields,
+	 * we will ack input fields in our response.
+	 */
+
+	err = efa_com_alloc_uar(&dev->edev, &result);
+	if (err)
+		goto err_out;
+
+	ucontext->uarn = result.uarn;
+	xa_init(&ucontext->mmap_xa);
+
+	resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE;
+	resp.cmds_supp_udata_mask |= EFA_USER_CMDS_SUPP_UDATA_CREATE_AH;
+	resp.sub_cqs_per_cq = dev->dev_attr.sub_cqs_per_cq;
+	resp.inline_buf_size = dev->dev_attr.inline_buf_size;
+	resp.max_llq_size = dev->dev_attr.max_llq_size;
+
+	if (udata && udata->outlen) {
+		err = ib_copy_to_udata(udata, &resp,
+				       min(sizeof(resp), udata->outlen));
+		if (err)
+			goto err_dealloc_uar;
+	}
+
+	return 0;
+
+err_dealloc_uar:
+	efa_dealloc_uar(dev, result.uarn);
+err_out:
+	atomic64_inc(&dev->stats.sw_stats.alloc_ucontext_err);
+	return err;
+}
+
+void efa_dealloc_ucontext(struct ib_ucontext *ibucontext)
+{
+	struct efa_ucontext *ucontext = to_eucontext(ibucontext);
+	struct efa_dev *dev = to_edev(ibucontext->device);
+
+	mmap_entries_remove_free(dev, ucontext);
+	efa_dealloc_uar(dev, ucontext->uarn);
+}
+
+static int __efa_mmap(struct efa_dev *dev, struct efa_ucontext *ucontext,
+		      struct vm_area_struct *vma, u64 key, u64 length)
+{
+	struct efa_mmap_entry *entry;
+	unsigned long va;
+	u64 pfn;
+	int err;
+
+	entry = mmap_entry_get(dev, ucontext, key, length);
+	if (!entry) {
+		ibdev_dbg(&dev->ibdev, "key[%#llx] does not have valid entry\n",
+			  key);
+		return -EINVAL;
+	}
+
+	ibdev_dbg(&dev->ibdev,
+		  "Mapping address[%#llx], length[%#llx], mmap_flag[%d]\n",
+		  entry->address, length, entry->mmap_flag);
+
+	pfn = entry->address >> PAGE_SHIFT;
+	switch (entry->mmap_flag) {
+	case EFA_MMAP_IO_NC:
+		err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, length,
+					pgprot_noncached(vma->vm_page_prot));
+		break;
+	case EFA_MMAP_IO_WC:
+		err = rdma_user_mmap_io(&ucontext->ibucontext, vma, pfn, length,
+					pgprot_writecombine(vma->vm_page_prot));
+		break;
+	case EFA_MMAP_DMA_PAGE:
+		for (va = vma->vm_start; va < vma->vm_end;
+		     va += PAGE_SIZE, pfn++) {
+			err = vm_insert_page(vma, va, pfn_to_page(pfn));
+			if (err)
+				break;
+		}
+		break;
+	default:
+		err = -EINVAL;
+	}
+
+	if (err)
+		ibdev_dbg(
+			&dev->ibdev,
+			"Couldn't mmap address[%#llx] length[%#llx] mmap_flag[%d] err[%d]\n",
+			entry->address, length, entry->mmap_flag, err);
+
+	return err;
+}
+
+int efa_mmap(struct ib_ucontext *ibucontext,
+	     struct vm_area_struct *vma)
+{
+	struct efa_ucontext *ucontext = to_eucontext(ibucontext);
+	struct efa_dev *dev = to_edev(ibucontext->device);
+	u64 length = vma->vm_end - vma->vm_start;
+	u64 key = vma->vm_pgoff << PAGE_SHIFT;
+
+	ibdev_dbg(&dev->ibdev,
+		  "start %#lx, end %#lx, length = %#llx, key = %#llx\n",
+		  vma->vm_start, vma->vm_end, length, key);
+
+	if (length % PAGE_SIZE != 0 || !(vma->vm_flags & VM_SHARED)) {
+		ibdev_dbg(&dev->ibdev,
+			  "length[%#llx] is not page size aligned[%#lx] or VM_SHARED is not set [%#lx]\n",
+			  length, PAGE_SIZE, vma->vm_flags);
+		return -EINVAL;
+	}
+
+	if (vma->vm_flags & VM_EXEC) {
+		ibdev_dbg(&dev->ibdev, "Mapping executable pages is not permitted\n");
+		return -EPERM;
+	}
+	vma->vm_flags &= ~VM_MAYEXEC;
+
+	return __efa_mmap(dev, ucontext, vma, key, length);
+}
+
+static int efa_ah_destroy(struct efa_dev *dev, struct efa_ah *ah)
+{
+	struct efa_com_destroy_ah_params params = {
+		.ah = ah->ah,
+		.pdn = to_epd(ah->ibah.pd)->pdn,
+	};
+
+	return efa_com_destroy_ah(&dev->edev, &params);
+}
+
+int efa_create_ah(struct ib_ah *ibah,
+		  struct rdma_ah_attr *ah_attr,
+		  u32 flags,
+		  struct ib_udata *udata)
+{
+	struct efa_dev *dev = to_edev(ibah->device);
+	struct efa_com_create_ah_params params = {};
+	struct efa_ibv_create_ah_resp resp = {};
+	struct efa_com_create_ah_result result;
+	struct efa_ah *ah = to_eah(ibah);
+	int err;
+
+	if (!(flags & RDMA_CREATE_AH_SLEEPABLE)) {
+		ibdev_dbg(&dev->ibdev,
+			  "Create address handle is not supported in atomic context\n");
+		err = -EOPNOTSUPP;
+		goto err_out;
+	}
+
+	if (udata->inlen &&
+	    !ib_is_udata_cleared(udata, 0, udata->inlen)) {
+		ibdev_dbg(&dev->ibdev, "Incompatible ABI params\n");
+		err = -EINVAL;
+		goto err_out;
+	}
+
+	memcpy(params.dest_addr, ah_attr->grh.dgid.raw,
+	       sizeof(params.dest_addr));
+	params.pdn = to_epd(ibah->pd)->pdn;
+	err = efa_com_create_ah(&dev->edev, &params, &result);
+	if (err)
+		goto err_out;
+
+	memcpy(ah->id, ah_attr->grh.dgid.raw, sizeof(ah->id));
+	ah->ah = result.ah;
+
+	resp.efa_address_handle = result.ah;
+
+	if (udata->outlen) {
+		err = ib_copy_to_udata(udata, &resp,
+				       min(sizeof(resp), udata->outlen));
+		if (err) {
+			ibdev_dbg(&dev->ibdev,
+				  "Failed to copy udata for create_ah response\n");
+			goto err_destroy_ah;
+		}
+	}
+	ibdev_dbg(&dev->ibdev, "Created ah[%d]\n", ah->ah);
+
+	return 0;
+
+err_destroy_ah:
+	efa_ah_destroy(dev, ah);
+err_out:
+	atomic64_inc(&dev->stats.sw_stats.create_ah_err);
+	return err;
+}
+
+void efa_destroy_ah(struct ib_ah *ibah, u32 flags)
+{
+	struct efa_dev *dev = to_edev(ibah->pd->device);
+	struct efa_ah *ah = to_eah(ibah);
+
+	ibdev_dbg(&dev->ibdev, "Destroy ah[%d]\n", ah->ah);
+
+	if (!(flags & RDMA_DESTROY_AH_SLEEPABLE)) {
+		ibdev_dbg(&dev->ibdev,
+			  "Destroy address handle is not supported in atomic context\n");
+		return;
+	}
+
+	efa_ah_destroy(dev, ah);
+}
+
+enum rdma_link_layer efa_port_link_layer(struct ib_device *ibdev,
+					 u8 port_num)
+{
+	return IB_LINK_LAYER_UNSPECIFIED;
+}
+