ehea: queue management

@@ -0,0 +1,719 @@
+/*
+ *  linux/drivers/net/ehea/ehea_qmr.c
+ *
+ *  eHEA ethernet device driver for IBM eServer System p
+ *
+ *  (C) Copyright IBM Corp. 2006
+ *
+ *  Authors:
+ *       Christoph Raisch <[email protected]>
+ *       Jan-Bernd Themann <[email protected]>
+ *       Heiko-Joerg Schick <[email protected]>
+ *       Thomas Klein <[email protected]>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "ehea.h"
+#include "ehea_phyp.h"
+#include "ehea_qmr.h"
+
+static void *ipz_qpageit_get_inc(struct ipz_queue *queue)
+{
+	void *retvalue = ipz_qeit_get(queue);
+	queue->current_q_offset += queue->pagesize;
+	if (queue->current_q_offset > queue->queue_length) {
+		queue->current_q_offset -= queue->pagesize;
+		retvalue = NULL;
+	}
+	else if ((((u64) retvalue) & (EHEA_PAGESIZE-1)) != 0) {
+		EDEB(4, "ERROR!! not at PAGE-Boundary");
+		return NULL;
+	}
+	EDEB(7, "queue=%p retvalue=%p", queue, retvalue);
+	return retvalue;
+}
+
+static int ipz_queue_ctor(struct ipz_queue *queue,
+			  const u32 nr_of_pages,
+			  const u32 pagesize, const u32 qe_size,
+			  const u32 nr_of_sg)
+{
+	int f;
+	EDEB_EN(7, "nr_of_pages=%x pagesize=%x qe_size=%x",
+		nr_of_pages, pagesize, qe_size);
+	queue->queue_length = nr_of_pages * pagesize;
+	queue->queue_pages = vmalloc(nr_of_pages * sizeof(void *));
+	if (!queue->queue_pages) {
+		EDEB(4, "ERROR!! didn't get the memory");
+		return 0;
+	}
+	memset(queue->queue_pages, 0, nr_of_pages * sizeof(void *));
+
+	for (f = 0; f < nr_of_pages; f++) {
+		(queue->queue_pages)[f] =
+		    (struct ipz_page *)get_zeroed_page(GFP_KERNEL);
+		if (!(queue->queue_pages)[f]) {
+			break;
+		}
+	}
+	if (f < nr_of_pages) {
+		int g;
+		EDEB_ERR(4, "couldn't get 0ed pages queue=%p f=%x "
+			 "nr_of_pages=%x", queue, f, nr_of_pages);
+		for (g = 0; g < f; g++) {
+			free_page((unsigned long)(queue->queue_pages)[g]);
+		}
+		return 0;
+	}
+	queue->current_q_offset = 0;
+	queue->qe_size = qe_size;
+	queue->act_nr_of_sg = nr_of_sg;
+	queue->pagesize = pagesize;
+	queue->toggle_state = 1;
+	EDEB_EX(7, "queue_length=%x queue_pages=%p qe_size=%x"
+		" act_nr_of_sg=%x", queue->queue_length, queue->queue_pages,
+		queue->qe_size, queue->act_nr_of_sg);
+	return 1;
+}
+
+static int ipz_queue_dtor(struct ipz_queue *queue)
+{
+	int g;
+	EDEB_EN(7, "ipz_queue pointer=%p", queue);
+	if (!queue) {
+		return 0;
+	}
+	if (!queue->queue_pages) {
+		return 0;
+	}
+	EDEB(7, "destructing a queue with the following properties:\n"
+	     "queue_length=%x act_nr_of_sg=%x pagesize=%x qe_size=%x",
+	     queue->queue_length, queue->act_nr_of_sg, queue->pagesize,
+	     queue->qe_size);
+	for (g = 0; g < (queue->queue_length / queue->pagesize); g++) {
+		free_page((unsigned long)(queue->queue_pages)[g]);
+	}
+	vfree(queue->queue_pages);
+
+	EDEB_EX(7, "queue freed!");
+	return 1;
+}
+
+struct ehea_cq *ehea_cq_new(void)
+{
+	struct ehea_cq *cq = vmalloc(sizeof(*cq));
+	if (cq)
+		memset(cq, 0, sizeof(*cq));
+	return cq;
+}
+
+void ehea_cq_delete(struct ehea_cq *cq)
+{
+	vfree(cq);
+}
+
+struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
+			       int nr_of_cqe, u64 eq_handle, u32 cq_token)
+{
+	struct ehea_cq *cq = NULL;
+	struct h_galpa gal;
+
+	u64 *cq_handle_ref;
+	u32 act_nr_of_entries;
+	u32 act_pages;
+	u64 hret;
+	int ipz_rc;
+	u32 counter;
+	void *vpage = NULL;
+	u64 rpage = 0;
+
+	EDEB_EN(7, "adapter=%p nr_of_cqe=%x , eq_handle: %016lX",
+		adapter, nr_of_cqe, eq_handle);
+
+	cq = ehea_cq_new();
+	if (!cq) {
+		cq = NULL;
+		EDEB_ERR(4, "ehea_create_cq ret=%p (-ENOMEM)", cq);
+		goto create_cq_exit0;
+	}
+
+	cq->attr.max_nr_of_cqes = nr_of_cqe;
+	cq->attr.cq_token = cq_token;
+	cq->attr.eq_handle = eq_handle;
+
+	cq->adapter = adapter;
+
+	cq_handle_ref = &cq->ipz_cq_handle;
+	act_nr_of_entries = 0;
+	act_pages = 0;
+
+	hret = ehea_h_alloc_resource_cq(adapter->handle,
+					cq,
+					&cq->attr,
+					&cq->ipz_cq_handle, &cq->galpas);
+	if (hret != H_SUCCESS) {
+		EDEB_ERR(4, "ehea_h_alloc_resource_cq failed. hret=%lx", hret);
+		goto create_cq_exit1;
+	}
+
+	ipz_rc = ipz_queue_ctor(&cq->ipz_queue, cq->attr.nr_pages,
+				EHEA_PAGESIZE, sizeof(struct ehea_cqe), 0);
+	if (!ipz_rc)
+		goto create_cq_exit2;
+
+	hret = H_SUCCESS;
+
+	for (counter = 0; counter < cq->attr.nr_pages; counter++) {
+		vpage = ipz_qpageit_get_inc(&cq->ipz_queue);
+		if (!vpage) {
+			EDEB_ERR(4, "ipz_qpageit_get_inc() "
+				 "returns NULL adapter=%p", adapter);
+			goto create_cq_exit3;
+		}
+
+		rpage = virt_to_abs(vpage);
+
+		hret = ehea_h_register_rpage_cq(adapter->handle,
+						cq->ipz_cq_handle,
+						0,
+						HIPZ_CQ_REGISTER_ORIG,
+						rpage, 1, cq->galpas.kernel);
+
+		if (hret < H_SUCCESS) {
+			EDEB_ERR(4, "ehea_h_register_rpage_cq() failed "
+				 "ehea_cq=%p hret=%lx "
+				 "counter=%i act_pages=%i",
+				 cq, hret, counter, cq->attr.nr_pages);
+			goto create_cq_exit3;
+		}
+
+		if (counter == (cq->attr.nr_pages - 1)) {
+			vpage = ipz_qpageit_get_inc(&cq->ipz_queue);
+
+			if ((hret != H_SUCCESS) || (vpage)) {
+				EDEB_ERR(4, "Registration of pages not "
+					 "complete ehea_cq=%p hret=%lx",
+					 cq, hret)
+				goto create_cq_exit3;
+			}
+		} else {
+			if ((hret != H_PAGE_REGISTERED) || (vpage == 0)) {
+				EDEB_ERR(4, "Registration of page failed "
+					 "ehea_cq=%p hret=%lx"
+					 "counter=%i act_pages=%i",
+					 cq, hret, counter, cq->attr.nr_pages);
+				goto create_cq_exit3;
+			}
+		}
+	}
+
+	ipz_qeit_reset(&cq->ipz_queue);
+	gal = cq->galpas.kernel;
+	ehea_reset_cq_ep(cq);
+	ehea_reset_cq_n1(cq);
+
+	EDEB_EX(7, "ret=%p ", cq);
+	return cq;
+
+create_cq_exit3:
+	ipz_queue_dtor(&cq->ipz_queue);
+
+create_cq_exit2:
+	hret = ehea_h_destroy_cq(adapter->handle, cq, cq->ipz_cq_handle,
+				 &cq->galpas);
+	EDEB(7, "return code of ehea_cq_destroy=%lx", hret);
+
+create_cq_exit1:
+	ehea_cq_delete(cq);
+
+create_cq_exit0:
+	EDEB_EX(7, "ret=NULL");
+	return NULL;
+}
+
+int ehea_destroy_cq(struct ehea_cq *cq)
+{
+	int ret = 0;
+	u64 adapter_handle;
+	u64 hret;
+
+	adapter_handle = cq->adapter->handle;
+	EDEB_EN(7, "adapter=%p cq=%p", cq->adapter, cq);
+
+	/* deregister all previous registered pages */
+	hret = ehea_h_destroy_cq(adapter_handle, cq, cq->ipz_cq_handle,
+				 &cq->galpas);
+	if (hret != H_SUCCESS) {
+		EDEB_ERR(4, "destroy CQ failed!");
+		return -EINVAL;
+	}
+	ipz_queue_dtor(&cq->ipz_queue);
+	ehea_cq_delete(cq);
+
+	EDEB_EX(7, "ret=%x ", ret);
+	return ret;
+}
+
+struct ehea_eq *ehea_eq_new(void)
+{
+	struct ehea_eq *eq = vmalloc(sizeof(*eq));
+	if (eq)
+		memset(eq, 0, sizeof(*eq));
+	return eq;
+}
+
+void ehea_eq_delete(struct ehea_eq *eq)
+{
+	vfree(eq);
+}
+
+struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
+			       const enum ehea_eq_type type,
+			       const u32 max_nr_of_eqes, const u8 eqe_gen)
+{
+	u64 hret = H_HARDWARE;
+	int ret = 0;
+	u32 i;
+	void *vpage = NULL;
+	struct ehea_eq *eq;
+
+	EDEB_EN(7, "adapter=%p, max_nr_of_eqes=%x", adapter, max_nr_of_eqes);
+
+	eq = ehea_eq_new();
+	if (!eq)
+		return NULL;
+
+	eq->attr.type = type;
+	eq->attr.max_nr_of_eqes = max_nr_of_eqes;
+	eq->attr.eqe_gen = eqe_gen;
+	spin_lock_init(&eq->spinlock);
+
+	hret = ehea_h_alloc_resource_eq(adapter->handle,
+					eq, &eq->attr, &eq->ipz_eq_handle);
+
+	if (hret != H_SUCCESS) {
+		EDEB_ERR(4, "ehea_h_alloc_resource_eq failed. hret=%lx", hret);
+		goto free_eq_mem;
+	}
+
+	ret = ipz_queue_ctor(&eq->ipz_queue, eq->attr.nr_pages,
+			      EHEA_PAGESIZE, sizeof(struct ehea_eqe), 0);
+	if (!ret) {
+		EDEB_ERR(4, "can't allocate EQ pages");
+		goto alloc_pages_failed;
+	}
+
+	for (i = 0; i < eq->attr.nr_pages; i++) {
+		u64 rpage;
+
+		if (!(vpage = ipz_qpageit_get_inc(&eq->ipz_queue))) {
+			hret = H_RESOURCE;
+			goto register_page_failed;
+		}
+
+		rpage = virt_to_abs(vpage);
+
+		hret = ehea_h_register_rpage_eq(adapter->handle,
+						eq->ipz_eq_handle,
+						0,
+						HIPZ_EQ_REGISTER_ORIG,
+						rpage, 1);
+
+		if (i == (eq->attr.nr_pages - 1)) {
+			/* last page */
+			vpage = ipz_qpageit_get_inc(&eq->ipz_queue);
+			if ((hret != H_SUCCESS) || (vpage)) {
+				goto register_page_failed;
+			}
+		} else {
+			if ((hret != H_PAGE_REGISTERED) || (!vpage)) {
+				goto register_page_failed;
+			}
+		}
+	}
+
+	ipz_qeit_reset(&eq->ipz_queue);
+
+	EDEB_EX(7, "hret=%lx", hret);
+	return eq;
+
+register_page_failed:
+	ipz_queue_dtor(&eq->ipz_queue);
+
+alloc_pages_failed:
+	ehea_h_destroy_eq(adapter->handle, eq, eq->ipz_eq_handle, &eq->galpas);
+free_eq_mem:
+	ehea_eq_delete(eq);
+
+	EDEB_EX(7, "return with error hret=%lx", hret);
+	return NULL;
+}
+
+void *ehea_poll_eq(struct ehea_adapter *adapter, struct ehea_eq *eq)
+{
+	void *eqe = NULL;
+	unsigned long flags = 0;
+
+	EDEB_EN(7, "adapter=%p  eq=%p", adapter, eq);
+
+	spin_lock_irqsave(&eq->spinlock, flags);
+	eqe = ipz_eqit_eq_get_inc_valid(&eq->ipz_queue);
+	spin_unlock_irqrestore(&eq->spinlock, flags);
+
+	EDEB_EX(7, "eqe=%p", eqe);
+
+	return eqe;
+}
+
+int ehea_destroy_eq(struct ehea_adapter *adapter, struct ehea_eq *eq)
+{
+	unsigned long flags = 0;
+	u64 hret = H_HARDWARE;
+
+	EDEB_EN(7, "adapter=%p  eq=%p", adapter, eq);
+
+	spin_lock_irqsave(&eq->spinlock, flags);
+
+	hret = ehea_h_destroy_eq(adapter->handle, eq, eq->ipz_eq_handle,
+				 &eq->galpas);
+	spin_unlock_irqrestore(&eq->spinlock, flags);
+
+	if (hret != H_SUCCESS) {
+		EDEB_ERR(4, "Failed freeing EQ resources. hret=%lx", hret);
+		return -EINVAL;
+	}
+	ipz_queue_dtor(&eq->ipz_queue);
+	ehea_eq_delete(eq);
+	EDEB_EX(7, "");
+
+	return 0;
+}
+
+struct ehea_qp *ehea_qp_new(void) {
+	struct ehea_qp *qp = vmalloc(sizeof(*qp));
+	if (qp != 0) {
+		memset(qp, 0, sizeof(*qp));
+	}
+	return qp;
+}
+
+void ehea_qp_delete(struct ehea_qp *qp)
+{
+	vfree(qp);
+}
+
+/**
+ * allocates memory for a queue and registers pages in phyp
+ */
+int ehea_qp_alloc_register(struct ehea_qp *qp,
+			   struct ipz_queue *ipz_queue,
+			   int nr_pages,
+			   int wqe_size,
+			   int act_nr_sges,
+			   struct ehea_adapter *adapter, int h_call_q_selector)
+{
+	u64 hret = H_HARDWARE;
+	u64 rpage = 0;
+	int iret = 0;
+	int cnt = 0;
+	void *vpage = NULL;
+
+	iret = ipz_queue_ctor(ipz_queue,
+			      nr_pages, EHEA_PAGESIZE, wqe_size, act_nr_sges);
+	if (!iret) {
+		EDEB_ERR(4, "Cannot allocate page for queue. iret=%x", iret);
+		return -ENOMEM;
+	}
+
+	EDEB(7, "queue_size=%x, alloc_len=%x, toggle_state=%d",
+	     ipz_queue->qe_size,
+	     ipz_queue->queue_length, ipz_queue->toggle_state);
+
+	for (cnt = 0; cnt < nr_pages; cnt++) {
+		vpage = ipz_qpageit_get_inc(ipz_queue);
+		if (!vpage) {
+			EDEB_ERR(4, "SQ ipz_qpageit_get_inc() "
+				 "failed p_vpage= %p", vpage);
+			goto qp_alloc_register_exit0;
+		}
+		rpage = virt_to_abs(vpage);
+
+		hret = ehea_h_register_rpage_qp(adapter->handle,
+						qp->ipz_qp_handle,
+						0,
+						h_call_q_selector,
+						rpage,
+						1, qp->galpas.kernel);
+
+		if (hret < H_SUCCESS) {
+			EDEB_ERR(4, "ehea_h_register_rpage_qp failed. hret=%lx",
+				 hret);
+			goto qp_alloc_register_exit0;
+		}
+	}
+	ipz_qeit_reset(ipz_queue);
+
+	return 0;
+
+qp_alloc_register_exit0:
+	ipz_queue_dtor(ipz_queue);
+	return -EINVAL;
+}
+
+static inline u32 map_swqe_size(u8 swqe_enc_size)
+{
+	return 128 << swqe_enc_size;
+}
+
+static inline u32 map_rwqe_size(u8 rwqe_enc_size)
+{
+	return 128 << rwqe_enc_size;
+}
+
+struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
+			       u32 pd, struct ehea_qp_init_attr *init_attr)
+{
+	struct ehea_qp *qp;
+	u64 hret = H_HARDWARE;
+
+	u32 wqe_size_in_bytes_sq = 0;
+	u32 wqe_size_in_bytes_rq1 = 0;
+	u32 wqe_size_in_bytes_rq2 = 0;
+	u32 wqe_size_in_bytes_rq3 = 0;
+
+	int ret = -1;
+
+	EDEB_EN(7, "init_attr=%p", init_attr);
+
+	qp = ehea_qp_new();
+
+	if (!qp) {
+		EDEB_ERR(4, "pd=%X not enough memory to alloc qp", pd);
+		return NULL;
+	}
+	qp->adapter = adapter;
+
+	EDEB(7, "send_ehea_cq->ipz_cq_handle=0x%lX"
+	     "recv_ehea_cq->ipz_cq_handle=0x%lX", init_attr->send_cq_handle,
+	     init_attr->recv_cq_handle);
+
+
+	hret = ehea_h_alloc_resource_qp(adapter->handle, qp,
+					init_attr,
+					pd,
+					&qp->ipz_qp_handle,
+					&qp->galpas);
+
+	if (hret != H_SUCCESS) {
+		EDEB_ERR(4, "ehea_h_alloc_resource_qp failed. hret=%lx", hret);
+		goto create_qp_exit1;
+	}
+
+	wqe_size_in_bytes_sq = map_swqe_size(init_attr->act_wqe_size_enc_sq);
+	EDEB(7, "SWQE SG %d", init_attr->wqe_size_enc_sq);
+
+	wqe_size_in_bytes_rq1 = map_rwqe_size(init_attr->act_wqe_size_enc_rq1);
+	wqe_size_in_bytes_rq2 = map_rwqe_size(init_attr->act_wqe_size_enc_rq2);
+	wqe_size_in_bytes_rq3 = map_rwqe_size(init_attr->act_wqe_size_enc_rq3);
+
+	EDEB(7, "SQ pages: %d, SQ WQE size:%d, max SWQE size enc: %d",
+	     init_attr->nr_sq_pages,
+	     wqe_size_in_bytes_sq, init_attr->act_wqe_size_enc_sq);
+
+	EDEB(7, "RQ1 pages: %d, RQ1 WQE size:%d, max RWQE size enc: %d",
+	     init_attr->nr_rq1_pages,
+	     wqe_size_in_bytes_rq1, init_attr->act_wqe_size_enc_rq1);
+
+	EDEB(7, "RQ2 pages: %d, RQ2 WQE size:%d, max RWQE size enc: %d",
+	     init_attr->nr_rq2_pages,
+	     wqe_size_in_bytes_rq2, init_attr->act_wqe_size_enc_rq2);
+
+	EDEB(7, "RQ3 pages: %d, RQ3 WQE size:%d, max RWQE size enc: %d",
+	     init_attr->nr_rq3_pages,
+	     wqe_size_in_bytes_rq3, init_attr->act_wqe_size_enc_rq3);
+
+	ret = ehea_qp_alloc_register(qp,
+				     &qp->ipz_squeue,
+				     init_attr->nr_sq_pages,
+				     wqe_size_in_bytes_sq,
+				     init_attr->act_wqe_size_enc_sq, adapter,
+				     0);
+	if (ret < H_SUCCESS) {
+		EDEB_ERR(4, "can't register for sq hret=%x", ret);
+		goto create_qp_exit2;
+	}
+
+	ret = ehea_qp_alloc_register(qp,
+				     &qp->ipz_rqueue1,
+				     init_attr->nr_rq1_pages,
+				     wqe_size_in_bytes_rq1,
+				     init_attr->act_wqe_size_enc_rq1,
+				     adapter, 1);
+
+	if (ret < 0) {
+		EDEB_ERR(4, "can't register for rq1 hret=%x", ret);
+		goto create_qp_exit3;
+	}
+
+	if (init_attr->rq_count > 1) {
+		ret = ehea_qp_alloc_register(qp,
+					     &qp->ipz_rqueue2,
+					     init_attr->nr_rq2_pages,
+					     wqe_size_in_bytes_rq2,
+					     init_attr->act_wqe_size_enc_rq2,
+					     adapter, 2);
+
+		if (ret < 0) {
+			EDEB_ERR(4, "can't register for rq2 hret=%x", ret);
+			goto create_qp_exit4;
+		}
+	}
+
+	if (init_attr->rq_count > 2) {
+		ret = ehea_qp_alloc_register(qp,
+					     &qp->ipz_rqueue3,
+					     init_attr->nr_rq3_pages,
+					     wqe_size_in_bytes_rq3,
+					     init_attr->act_wqe_size_enc_rq3,
+					     adapter, 3);
+
+		if (ret != 0) {
+			EDEB_ERR(4, "can't register for rq3 hret=%x", ret);
+			goto create_qp_exit5;
+		}
+	}
+
+	qp->init_attr = *init_attr;
+
+	EDEB_EX(7, "");
+	return qp;
+
+create_qp_exit5:
+	ipz_queue_dtor(&qp->ipz_rqueue2);
+
+create_qp_exit4:
+	ipz_queue_dtor(&qp->ipz_rqueue1);
+
+create_qp_exit3:
+	ipz_queue_dtor(&qp->ipz_squeue);
+
+create_qp_exit2:
+	hret = ehea_h_destroy_qp(adapter->handle, qp, qp->ipz_qp_handle,
+				 &qp->galpas);
+
+create_qp_exit1:
+	ehea_qp_delete(qp);
+
+	EDEB_EX(7, "hret=NULL");
+	return NULL;
+
+}
+
+int ehea_destroy_qp(struct ehea_qp *qp)
+{
+	int ret = 0;
+	u64 hret;
+	struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
+	EDEB_EX(7, "");
+
+	hret = ehea_h_destroy_qp(qp->adapter->handle, qp, qp->ipz_qp_handle,
+				 &qp->galpas);
+	if (hret != H_SUCCESS) {
+		EDEB_ERR(4, "destroy QP failed!");
+		ret = -EINVAL;
+	}
+
+	ipz_queue_dtor(&qp->ipz_squeue);
+	ipz_queue_dtor(&qp->ipz_rqueue1);
+
+   	if(qp_attr->rq_count > 1)
+		ipz_queue_dtor(&qp->ipz_rqueue2);
+   	if(qp_attr->rq_count > 2)
+		ipz_queue_dtor(&qp->ipz_rqueue3);
+	ehea_qp_delete(qp);
+
+	EDEB_EX(7, "hret=%lx", hret);
+
+	return ret;
+}
+
+#define EHEA_MEM_START 0xc000000000000000
+#define EHEA_MEM_ACC_CTRL 0x00800000
+
+int ehea_reg_mr_adapter(struct ehea_adapter *adapter)
+{
+	int i;
+	u64 hret;
+	u64 start = EHEA_MEM_START;
+	u64 end = (u64) high_memory;
+	u64 nr_pages = (end - start) / PAGE_SIZE;
+	u32 acc_ctrl = EHEA_MEM_ACC_CTRL;
+
+	EDEB_EN(7, "adapter=%p", adapter);
+
+	hret = ehea_h_alloc_resource_mr(adapter->handle,
+					start,
+					end - start,
+					acc_ctrl,
+					adapter->pd,
+					&adapter->mr_handle,
+					&adapter->lkey);
+	if (hret != H_SUCCESS) {
+		EDEB_EX(4, "Error: hret=%lX\n", hret);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < nr_pages; i++) {
+		hret = ehea_h_register_rpage_mr(adapter->handle,
+						adapter->mr_handle,
+						0,
+						0,
+						virt_to_abs(
+							(void *)(((u64) start)
+							+ (i * PAGE_SIZE))),
+						1);
+
+		if (((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))) {
+			ehea_h_free_resource_mr(adapter->handle, adapter->mr_handle);
+			EDEB_EX(4, " register rpage_mr: hret=%lX\n", hret);
+			return -EINVAL;
+		}
+	}
+
+	if (hret != H_SUCCESS) {
+		ehea_h_free_resource_mr(adapter->handle, adapter->mr_handle);
+		EDEB_EX(4, " register rpage_mr failed for last page:"
+			"hret=%lX\n", hret);
+		return -EINVAL;
+	}
+
+	EDEB_EX(7, "");
+	return 0;
+}
+
+int ehea_dereg_mr_adapter(struct ehea_adapter *adapter)
+{
+	u64 hret;
+	EDEB_EN(7, "adapter=%p", adapter);
+	hret = ehea_h_free_resource_mr(adapter->handle, adapter->mr_handle);
+	if (hret != H_SUCCESS) {
+		EDEB_EX(4, "deregistering memory region failed");
+		return -EINVAL;
+	}
+	EDEB_EX(7, "");
+	return 0;
+}

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