IB/ehca: Add driver for IBM eHCA InfiniBand adapters

Add a driver for IBM GX bus InfiniBand adapters, which are usable with
some pSeries/System p systems.

Signed-off-by: Heiko J Schick <schickhj.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 2261 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_mrmw.c b/drivers/infiniband/hw/ehca/ehca_mrmw.c
new file mode 100644
index 000000000000..5ca65441e1da
--- /dev/null
+++ b/drivers/infiniband/hw/ehca/ehca_mrmw.c
@@ -0,0 +1,2261 @@
+/*
+ *  IBM eServer eHCA Infiniband device driver for Linux on POWER
+ *
+ *  MR/MW functions
+ *
+ *  Authors: Dietmar Decker <ddecker@de.ibm.com>
+ *           Christoph Raisch <raisch@de.ibm.com>
+ *
+ *  Copyright (c) 2005 IBM Corporation
+ *
+ *  All rights reserved.
+ *
+ *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
+ *  BSD.
+ *
+ * OpenIB BSD License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials
+ * provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <asm/current.h>
+
+#include "ehca_iverbs.h"
+#include "ehca_mrmw.h"
+#include "hcp_if.h"
+#include "hipz_hw.h"
+
+static struct kmem_cache *mr_cache;
+static struct kmem_cache *mw_cache;
+
+static struct ehca_mr *ehca_mr_new(void)
+{
+	struct ehca_mr *me;
+
+	me = kmem_cache_alloc(mr_cache, SLAB_KERNEL);
+	if (me) {
+		memset(me, 0, sizeof(struct ehca_mr));
+		spin_lock_init(&me->mrlock);
+	} else
+		ehca_gen_err("alloc failed");
+
+	return me;
+}
+
+static void ehca_mr_delete(struct ehca_mr *me)
+{
+	kmem_cache_free(mr_cache, me);
+}
+
+static struct ehca_mw *ehca_mw_new(void)
+{
+	struct ehca_mw *me;
+
+	me = kmem_cache_alloc(mw_cache, SLAB_KERNEL);
+	if (me) {
+		memset(me, 0, sizeof(struct ehca_mw));
+		spin_lock_init(&me->mwlock);
+	} else
+		ehca_gen_err("alloc failed");
+
+	return me;
+}
+
+static void ehca_mw_delete(struct ehca_mw *me)
+{
+	kmem_cache_free(mw_cache, me);
+}
+
+/*----------------------------------------------------------------------*/
+
+struct ib_mr *ehca_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
+{
+	struct ib_mr *ib_mr;
+	int ret;
+	struct ehca_mr *e_maxmr;
+	struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
+	struct ehca_shca *shca =
+		container_of(pd->device, struct ehca_shca, ib_device);
+
+	if (shca->maxmr) {
+		e_maxmr = ehca_mr_new();
+		if (!e_maxmr) {
+			ehca_err(&shca->ib_device, "out of memory");
+			ib_mr = ERR_PTR(-ENOMEM);
+			goto get_dma_mr_exit0;
+		}
+
+		ret = ehca_reg_maxmr(shca, e_maxmr, (u64*)KERNELBASE,
+				     mr_access_flags, e_pd,
+				     &e_maxmr->ib.ib_mr.lkey,
+				     &e_maxmr->ib.ib_mr.rkey);
+		if (ret) {
+			ib_mr = ERR_PTR(ret);
+			goto get_dma_mr_exit0;
+		}
+		ib_mr = &e_maxmr->ib.ib_mr;
+	} else {
+		ehca_err(&shca->ib_device, "no internal max-MR exist!");
+		ib_mr = ERR_PTR(-EINVAL);
+		goto get_dma_mr_exit0;
+	}
+
+get_dma_mr_exit0:
+	if (IS_ERR(ib_mr))
+		ehca_err(&shca->ib_device, "rc=%lx pd=%p mr_access_flags=%x ",
+			 PTR_ERR(ib_mr), pd, mr_access_flags);
+	return ib_mr;
+} /* end ehca_get_dma_mr() */
+
+/*----------------------------------------------------------------------*/
+
+struct ib_mr *ehca_reg_phys_mr(struct ib_pd *pd,
+			       struct ib_phys_buf *phys_buf_array,
+			       int num_phys_buf,
+			       int mr_access_flags,
+			       u64 *iova_start)
+{
+	struct ib_mr *ib_mr;
+	int ret;
+	struct ehca_mr *e_mr;
+	struct ehca_shca *shca =
+		container_of(pd->device, struct ehca_shca, ib_device);
+	struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
+
+	u64 size;
+	struct ehca_mr_pginfo pginfo={0,0,0,0,0,0,0,NULL,0,NULL,NULL,0,NULL,0};
+	u32 num_pages_mr;
+	u32 num_pages_4k; /* 4k portion "pages" */
+
+	if ((num_phys_buf <= 0) || !phys_buf_array) {
+		ehca_err(pd->device, "bad input values: num_phys_buf=%x "
+			 "phys_buf_array=%p", num_phys_buf, phys_buf_array);
+		ib_mr = ERR_PTR(-EINVAL);
+		goto reg_phys_mr_exit0;
+	}
+	if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
+	     !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
+	    ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
+	     !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
+		/*
+		 * Remote Write Access requires Local Write Access
+		 * Remote Atomic Access requires Local Write Access
+		 */
+		ehca_err(pd->device, "bad input values: mr_access_flags=%x",
+			 mr_access_flags);
+		ib_mr = ERR_PTR(-EINVAL);
+		goto reg_phys_mr_exit0;
+	}
+
+	/* check physical buffer list and calculate size */
+	ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array, num_phys_buf,
+					    iova_start, &size);
+	if (ret) {
+		ib_mr = ERR_PTR(ret);
+		goto reg_phys_mr_exit0;
+	}
+	if ((size == 0) ||
+	    (((u64)iova_start + size) < (u64)iova_start)) {
+		ehca_err(pd->device, "bad input values: size=%lx iova_start=%p",
+			 size, iova_start);
+		ib_mr = ERR_PTR(-EINVAL);
+		goto reg_phys_mr_exit0;
+	}
+
+	e_mr = ehca_mr_new();
+	if (!e_mr) {
+		ehca_err(pd->device, "out of memory");
+		ib_mr = ERR_PTR(-ENOMEM);
+		goto reg_phys_mr_exit0;
+	}
+
+	/* determine number of MR pages */
+	num_pages_mr = ((((u64)iova_start % PAGE_SIZE) + size +
+			 PAGE_SIZE - 1) / PAGE_SIZE);
+	num_pages_4k = ((((u64)iova_start % EHCA_PAGESIZE) + size +
+			 EHCA_PAGESIZE - 1) / EHCA_PAGESIZE);
+
+	/* register MR on HCA */
+	if (ehca_mr_is_maxmr(size, iova_start)) {
+		e_mr->flags |= EHCA_MR_FLAG_MAXMR;
+		ret = ehca_reg_maxmr(shca, e_mr, iova_start, mr_access_flags,
+				     e_pd, &e_mr->ib.ib_mr.lkey,
+				     &e_mr->ib.ib_mr.rkey);
+		if (ret) {
+			ib_mr = ERR_PTR(ret);
+			goto reg_phys_mr_exit1;
+		}
+	} else {
+		pginfo.type           = EHCA_MR_PGI_PHYS;
+		pginfo.num_pages      = num_pages_mr;
+		pginfo.num_4k         = num_pages_4k;
+		pginfo.num_phys_buf   = num_phys_buf;
+		pginfo.phys_buf_array = phys_buf_array;
+		pginfo.next_4k        = (((u64)iova_start & ~PAGE_MASK) /
+					 EHCA_PAGESIZE);
+
+		ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
+				  e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
+				  &e_mr->ib.ib_mr.rkey);
+		if (ret) {
+			ib_mr = ERR_PTR(ret);
+			goto reg_phys_mr_exit1;
+		}
+	}
+
+	/* successful registration of all pages */
+	return &e_mr->ib.ib_mr;
+
+reg_phys_mr_exit1:
+	ehca_mr_delete(e_mr);
+reg_phys_mr_exit0:
+	if (IS_ERR(ib_mr))
+		ehca_err(pd->device, "rc=%lx pd=%p phys_buf_array=%p "
+			 "num_phys_buf=%x mr_access_flags=%x iova_start=%p",
+			 PTR_ERR(ib_mr), pd, phys_buf_array,
+			 num_phys_buf, mr_access_flags, iova_start);
+	return ib_mr;
+} /* end ehca_reg_phys_mr() */
+
+/*----------------------------------------------------------------------*/
+
+struct ib_mr *ehca_reg_user_mr(struct ib_pd *pd,
+			       struct ib_umem *region,
+			       int mr_access_flags,
+			       struct ib_udata *udata)
+{
+	struct ib_mr *ib_mr;
+	struct ehca_mr *e_mr;
+	struct ehca_shca *shca =
+		container_of(pd->device, struct ehca_shca, ib_device);
+	struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
+	struct ehca_mr_pginfo pginfo={0,0,0,0,0,0,0,NULL,0,NULL,NULL,0,NULL,0};
+	int ret;
+	u32 num_pages_mr;
+	u32 num_pages_4k; /* 4k portion "pages" */
+
+	if (!pd) {
+		ehca_gen_err("bad pd=%p", pd);
+		return ERR_PTR(-EFAULT);
+	}
+	if (!region) {
+		ehca_err(pd->device, "bad input values: region=%p", region);
+		ib_mr = ERR_PTR(-EINVAL);
+		goto reg_user_mr_exit0;
+	}
+	if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
+	     !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
+	    ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
+	     !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
+		/*
+		 * Remote Write Access requires Local Write Access
+		 * Remote Atomic Access requires Local Write Access
+		 */
+		ehca_err(pd->device, "bad input values: mr_access_flags=%x",
+			 mr_access_flags);
+		ib_mr = ERR_PTR(-EINVAL);
+		goto reg_user_mr_exit0;
+	}
+	if (region->page_size != PAGE_SIZE) {
+		ehca_err(pd->device, "page size not supported, "
+			 "region->page_size=%x", region->page_size);
+		ib_mr = ERR_PTR(-EINVAL);
+		goto reg_user_mr_exit0;
+	}
+
+	if ((region->length == 0) ||
+	    ((region->virt_base + region->length) < region->virt_base)) {
+		ehca_err(pd->device, "bad input values: length=%lx "
+			 "virt_base=%lx", region->length, region->virt_base);
+		ib_mr = ERR_PTR(-EINVAL);
+		goto reg_user_mr_exit0;
+	}
+
+	e_mr = ehca_mr_new();
+	if (!e_mr) {
+		ehca_err(pd->device, "out of memory");
+		ib_mr = ERR_PTR(-ENOMEM);
+		goto reg_user_mr_exit0;
+	}
+
+	/* determine number of MR pages */
+	num_pages_mr = (((region->virt_base % PAGE_SIZE) + region->length +
+			 PAGE_SIZE - 1) / PAGE_SIZE);
+	num_pages_4k = (((region->virt_base % EHCA_PAGESIZE) + region->length +
+			 EHCA_PAGESIZE - 1) / EHCA_PAGESIZE);
+
+	/* register MR on HCA */
+	pginfo.type       = EHCA_MR_PGI_USER;
+	pginfo.num_pages  = num_pages_mr;
+	pginfo.num_4k     = num_pages_4k;
+	pginfo.region     = region;
+	pginfo.next_4k	  = region->offset / EHCA_PAGESIZE;
+	pginfo.next_chunk = list_prepare_entry(pginfo.next_chunk,
+					       (&region->chunk_list),
+					       list);
+
+	ret = ehca_reg_mr(shca, e_mr, (u64*)region->virt_base,
+			  region->length, mr_access_flags, e_pd, &pginfo,
+			  &e_mr->ib.ib_mr.lkey, &e_mr->ib.ib_mr.rkey);
+	if (ret) {
+		ib_mr = ERR_PTR(ret);
+		goto reg_user_mr_exit1;
+	}
+
+	/* successful registration of all pages */
+	return &e_mr->ib.ib_mr;
+
+reg_user_mr_exit1:
+	ehca_mr_delete(e_mr);
+reg_user_mr_exit0:
+	if (IS_ERR(ib_mr))
+		ehca_err(pd->device, "rc=%lx pd=%p region=%p mr_access_flags=%x"
+			 " udata=%p",
+			 PTR_ERR(ib_mr), pd, region, mr_access_flags, udata);
+	return ib_mr;
+} /* end ehca_reg_user_mr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_rereg_phys_mr(struct ib_mr *mr,
+		       int mr_rereg_mask,
+		       struct ib_pd *pd,
+		       struct ib_phys_buf *phys_buf_array,
+		       int num_phys_buf,
+		       int mr_access_flags,
+		       u64 *iova_start)
+{
+	int ret;
+
+	struct ehca_shca *shca =
+		container_of(mr->device, struct ehca_shca, ib_device);
+	struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
+	struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
+	u64 new_size;
+	u64 *new_start;
+	u32 new_acl;
+	struct ehca_pd *new_pd;
+	u32 tmp_lkey, tmp_rkey;
+	unsigned long sl_flags;
+	u32 num_pages_mr = 0;
+	u32 num_pages_4k = 0; /* 4k portion "pages" */
+	struct ehca_mr_pginfo pginfo={0,0,0,0,0,0,0,NULL,0,NULL,NULL,0,NULL,0};
+	u32 cur_pid = current->tgid;
+
+	if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
+	    (my_pd->ownpid != cur_pid)) {
+		ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
+			 cur_pid, my_pd->ownpid);
+		ret = -EINVAL;
+		goto rereg_phys_mr_exit0;
+	}
+
+	if (!(mr_rereg_mask & IB_MR_REREG_TRANS)) {
+		/* TODO not supported, because PHYP rereg hCall needs pages */
+		ehca_err(mr->device, "rereg without IB_MR_REREG_TRANS not "
+			 "supported yet, mr_rereg_mask=%x", mr_rereg_mask);
+		ret = -EINVAL;
+		goto rereg_phys_mr_exit0;
+	}
+
+	if (mr_rereg_mask & IB_MR_REREG_PD) {
+		if (!pd) {
+			ehca_err(mr->device, "rereg with bad pd, pd=%p "
+				 "mr_rereg_mask=%x", pd, mr_rereg_mask);
+			ret = -EINVAL;
+			goto rereg_phys_mr_exit0;
+		}
+	}
+
+	if ((mr_rereg_mask &
+	     ~(IB_MR_REREG_TRANS | IB_MR_REREG_PD | IB_MR_REREG_ACCESS)) ||
+	    (mr_rereg_mask == 0)) {
+		ret = -EINVAL;
+		goto rereg_phys_mr_exit0;
+	}
+
+	/* check other parameters */
+	if (e_mr == shca->maxmr) {
+		/* should be impossible, however reject to be sure */
+		ehca_err(mr->device, "rereg internal max-MR impossible, mr=%p "
+			 "shca->maxmr=%p mr->lkey=%x",
+			 mr, shca->maxmr, mr->lkey);
+		ret = -EINVAL;
+		goto rereg_phys_mr_exit0;
+	}
+	if (mr_rereg_mask & IB_MR_REREG_TRANS) { /* transl., i.e. addr/size */
+		if (e_mr->flags & EHCA_MR_FLAG_FMR) {
+			ehca_err(mr->device, "not supported for FMR, mr=%p "
+				 "flags=%x", mr, e_mr->flags);
+			ret = -EINVAL;
+			goto rereg_phys_mr_exit0;
+		}
+		if (!phys_buf_array || num_phys_buf <= 0) {
+			ehca_err(mr->device, "bad input values: mr_rereg_mask=%x"
+				 " phys_buf_array=%p num_phys_buf=%x",
+				 mr_rereg_mask, phys_buf_array, num_phys_buf);
+			ret = -EINVAL;
+			goto rereg_phys_mr_exit0;
+		}
+	}
+	if ((mr_rereg_mask & IB_MR_REREG_ACCESS) &&	/* change ACL */
+	    (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
+	      !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
+	     ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
+	      !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)))) {
+		/*
+		 * Remote Write Access requires Local Write Access
+		 * Remote Atomic Access requires Local Write Access
+		 */
+		ehca_err(mr->device, "bad input values: mr_rereg_mask=%x "
+			 "mr_access_flags=%x", mr_rereg_mask, mr_access_flags);
+		ret = -EINVAL;
+		goto rereg_phys_mr_exit0;
+	}
+
+	/* set requested values dependent on rereg request */
+	spin_lock_irqsave(&e_mr->mrlock, sl_flags);
+	new_start = e_mr->start;  /* new == old address */
+	new_size  = e_mr->size;	  /* new == old length */
+	new_acl   = e_mr->acl;	  /* new == old access control */
+	new_pd    = container_of(mr->pd,struct ehca_pd,ib_pd); /*new == old PD*/
+
+	if (mr_rereg_mask & IB_MR_REREG_TRANS) {
+		new_start = iova_start;	/* change address */
+		/* check physical buffer list and calculate size */
+		ret = ehca_mr_chk_buf_and_calc_size(phys_buf_array,
+						    num_phys_buf, iova_start,
+						    &new_size);
+		if (ret)
+			goto rereg_phys_mr_exit1;
+		if ((new_size == 0) ||
+		    (((u64)iova_start + new_size) < (u64)iova_start)) {
+			ehca_err(mr->device, "bad input values: new_size=%lx "
+				 "iova_start=%p", new_size, iova_start);
+			ret = -EINVAL;
+			goto rereg_phys_mr_exit1;
+		}
+		num_pages_mr = ((((u64)new_start % PAGE_SIZE) + new_size +
+				 PAGE_SIZE - 1) / PAGE_SIZE);
+		num_pages_4k = ((((u64)new_start % EHCA_PAGESIZE) + new_size +
+				 EHCA_PAGESIZE - 1) / EHCA_PAGESIZE);
+		pginfo.type           = EHCA_MR_PGI_PHYS;
+		pginfo.num_pages      = num_pages_mr;
+		pginfo.num_4k         = num_pages_4k;
+		pginfo.num_phys_buf   = num_phys_buf;
+		pginfo.phys_buf_array = phys_buf_array;
+		pginfo.next_4k        = (((u64)iova_start & ~PAGE_MASK) /
+					 EHCA_PAGESIZE);
+	}
+	if (mr_rereg_mask & IB_MR_REREG_ACCESS)
+		new_acl = mr_access_flags;
+	if (mr_rereg_mask & IB_MR_REREG_PD)
+		new_pd = container_of(pd, struct ehca_pd, ib_pd);
+
+	ret = ehca_rereg_mr(shca, e_mr, new_start, new_size, new_acl,
+			    new_pd, &pginfo, &tmp_lkey, &tmp_rkey);
+	if (ret)
+		goto rereg_phys_mr_exit1;
+
+	/* successful reregistration */
+	if (mr_rereg_mask & IB_MR_REREG_PD)
+		mr->pd = pd;
+	mr->lkey = tmp_lkey;
+	mr->rkey = tmp_rkey;
+
+rereg_phys_mr_exit1:
+	spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
+rereg_phys_mr_exit0:
+	if (ret)
+		ehca_err(mr->device, "ret=%x mr=%p mr_rereg_mask=%x pd=%p "
+			 "phys_buf_array=%p num_phys_buf=%x mr_access_flags=%x "
+			 "iova_start=%p",
+			 ret, mr, mr_rereg_mask, pd, phys_buf_array,
+			 num_phys_buf, mr_access_flags, iova_start);
+	return ret;
+} /* end ehca_rereg_phys_mr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
+{
+	int ret = 0;
+	u64 h_ret;
+	struct ehca_shca *shca =
+		container_of(mr->device, struct ehca_shca, ib_device);
+	struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
+	struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
+	u32 cur_pid = current->tgid;
+	unsigned long sl_flags;
+	struct ehca_mr_hipzout_parms hipzout = {{0},0,0,0,0,0};
+
+	if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
+	    (my_pd->ownpid != cur_pid)) {
+		ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
+			 cur_pid, my_pd->ownpid);
+		ret = -EINVAL;
+		goto query_mr_exit0;
+	}
+
+	if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
+		ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
+			 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
+		ret = -EINVAL;
+		goto query_mr_exit0;
+	}
+
+	memset(mr_attr, 0, sizeof(struct ib_mr_attr));
+	spin_lock_irqsave(&e_mr->mrlock, sl_flags);
+
+	h_ret = hipz_h_query_mr(shca->ipz_hca_handle, e_mr, &hipzout);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(mr->device, "hipz_mr_query failed, h_ret=%lx mr=%p "
+			 "hca_hndl=%lx mr_hndl=%lx lkey=%x",
+			 h_ret, mr, shca->ipz_hca_handle.handle,
+			 e_mr->ipz_mr_handle.handle, mr->lkey);
+		ret = ehca_mrmw_map_hrc_query_mr(h_ret);
+		goto query_mr_exit1;
+	}
+	mr_attr->pd               = mr->pd;
+	mr_attr->device_virt_addr = hipzout.vaddr;
+	mr_attr->size             = hipzout.len;
+	mr_attr->lkey             = hipzout.lkey;
+	mr_attr->rkey             = hipzout.rkey;
+	ehca_mrmw_reverse_map_acl(&hipzout.acl, &mr_attr->mr_access_flags);
+
+query_mr_exit1:
+	spin_unlock_irqrestore(&e_mr->mrlock, sl_flags);
+query_mr_exit0:
+	if (ret)
+		ehca_err(mr->device, "ret=%x mr=%p mr_attr=%p",
+			 ret, mr, mr_attr);
+	return ret;
+} /* end ehca_query_mr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_dereg_mr(struct ib_mr *mr)
+{
+	int ret = 0;
+	u64 h_ret;
+	struct ehca_shca *shca =
+		container_of(mr->device, struct ehca_shca, ib_device);
+	struct ehca_mr *e_mr = container_of(mr, struct ehca_mr, ib.ib_mr);
+	struct ehca_pd *my_pd = container_of(mr->pd, struct ehca_pd, ib_pd);
+	u32 cur_pid = current->tgid;
+
+	if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
+	    (my_pd->ownpid != cur_pid)) {
+		ehca_err(mr->device, "Invalid caller pid=%x ownpid=%x",
+			 cur_pid, my_pd->ownpid);
+		ret = -EINVAL;
+		goto dereg_mr_exit0;
+	}
+
+	if ((e_mr->flags & EHCA_MR_FLAG_FMR)) {
+		ehca_err(mr->device, "not supported for FMR, mr=%p e_mr=%p "
+			 "e_mr->flags=%x", mr, e_mr, e_mr->flags);
+		ret = -EINVAL;
+		goto dereg_mr_exit0;
+	} else if (e_mr == shca->maxmr) {
+		/* should be impossible, however reject to be sure */
+		ehca_err(mr->device, "dereg internal max-MR impossible, mr=%p "
+			 "shca->maxmr=%p mr->lkey=%x",
+			 mr, shca->maxmr, mr->lkey);
+		ret = -EINVAL;
+		goto dereg_mr_exit0;
+	}
+
+	/* TODO: BUSY: MR still has bound window(s) */
+	h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(mr->device, "hipz_free_mr failed, h_ret=%lx shca=%p "
+			 "e_mr=%p hca_hndl=%lx mr_hndl=%lx mr->lkey=%x",
+			 h_ret, shca, e_mr, shca->ipz_hca_handle.handle,
+			 e_mr->ipz_mr_handle.handle, mr->lkey);
+		ret = ehca_mrmw_map_hrc_free_mr(h_ret);
+		goto dereg_mr_exit0;
+	}
+
+	/* successful deregistration */
+	ehca_mr_delete(e_mr);
+
+dereg_mr_exit0:
+	if (ret)
+		ehca_err(mr->device, "ret=%x mr=%p", ret, mr);
+	return ret;
+} /* end ehca_dereg_mr() */
+
+/*----------------------------------------------------------------------*/
+
+struct ib_mw *ehca_alloc_mw(struct ib_pd *pd)
+{
+	struct ib_mw *ib_mw;
+	u64 h_ret;
+	struct ehca_mw *e_mw;
+	struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
+	struct ehca_shca *shca =
+		container_of(pd->device, struct ehca_shca, ib_device);
+	struct ehca_mw_hipzout_parms hipzout = {{0},0};
+
+	e_mw = ehca_mw_new();
+	if (!e_mw) {
+		ib_mw = ERR_PTR(-ENOMEM);
+		goto alloc_mw_exit0;
+	}
+
+	h_ret = hipz_h_alloc_resource_mw(shca->ipz_hca_handle, e_mw,
+					 e_pd->fw_pd, &hipzout);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(pd->device, "hipz_mw_allocate failed, h_ret=%lx "
+			 "shca=%p hca_hndl=%lx mw=%p",
+			 h_ret, shca, shca->ipz_hca_handle.handle, e_mw);
+		ib_mw = ERR_PTR(ehca_mrmw_map_hrc_alloc(h_ret));
+		goto alloc_mw_exit1;
+	}
+	/* successful MW allocation */
+	e_mw->ipz_mw_handle = hipzout.handle;
+	e_mw->ib_mw.rkey    = hipzout.rkey;
+	return &e_mw->ib_mw;
+
+alloc_mw_exit1:
+	ehca_mw_delete(e_mw);
+alloc_mw_exit0:
+	if (IS_ERR(ib_mw))
+		ehca_err(pd->device, "rc=%lx pd=%p", PTR_ERR(ib_mw), pd);
+	return ib_mw;
+} /* end ehca_alloc_mw() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_bind_mw(struct ib_qp *qp,
+		 struct ib_mw *mw,
+		 struct ib_mw_bind *mw_bind)
+{
+	/* TODO: not supported up to now */
+	ehca_gen_err("bind MW currently not supported by HCAD");
+
+	return -EPERM;
+} /* end ehca_bind_mw() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_dealloc_mw(struct ib_mw *mw)
+{
+	u64 h_ret;
+	struct ehca_shca *shca =
+		container_of(mw->device, struct ehca_shca, ib_device);
+	struct ehca_mw *e_mw = container_of(mw, struct ehca_mw, ib_mw);
+
+	h_ret = hipz_h_free_resource_mw(shca->ipz_hca_handle, e_mw);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(mw->device, "hipz_free_mw failed, h_ret=%lx shca=%p "
+			 "mw=%p rkey=%x hca_hndl=%lx mw_hndl=%lx",
+			 h_ret, shca, mw, mw->rkey, shca->ipz_hca_handle.handle,
+			 e_mw->ipz_mw_handle.handle);
+		return ehca_mrmw_map_hrc_free_mw(h_ret);
+	}
+	/* successful deallocation */
+	ehca_mw_delete(e_mw);
+	return 0;
+} /* end ehca_dealloc_mw() */
+
+/*----------------------------------------------------------------------*/
+
+struct ib_fmr *ehca_alloc_fmr(struct ib_pd *pd,
+			      int mr_access_flags,
+			      struct ib_fmr_attr *fmr_attr)
+{
+	struct ib_fmr *ib_fmr;
+	struct ehca_shca *shca =
+		container_of(pd->device, struct ehca_shca, ib_device);
+	struct ehca_pd *e_pd = container_of(pd, struct ehca_pd, ib_pd);
+	struct ehca_mr *e_fmr;
+	int ret;
+	u32 tmp_lkey, tmp_rkey;
+	struct ehca_mr_pginfo pginfo={0,0,0,0,0,0,0,NULL,0,NULL,NULL,0,NULL,0};
+
+	/* check other parameters */
+	if (((mr_access_flags & IB_ACCESS_REMOTE_WRITE) &&
+	     !(mr_access_flags & IB_ACCESS_LOCAL_WRITE)) ||
+	    ((mr_access_flags & IB_ACCESS_REMOTE_ATOMIC) &&
+	     !(mr_access_flags & IB_ACCESS_LOCAL_WRITE))) {
+		/*
+		 * Remote Write Access requires Local Write Access
+		 * Remote Atomic Access requires Local Write Access
+		 */
+		ehca_err(pd->device, "bad input values: mr_access_flags=%x",
+			 mr_access_flags);
+		ib_fmr = ERR_PTR(-EINVAL);
+		goto alloc_fmr_exit0;
+	}
+	if (mr_access_flags & IB_ACCESS_MW_BIND) {
+		ehca_err(pd->device, "bad input values: mr_access_flags=%x",
+			 mr_access_flags);
+		ib_fmr = ERR_PTR(-EINVAL);
+		goto alloc_fmr_exit0;
+	}
+	if ((fmr_attr->max_pages == 0) || (fmr_attr->max_maps == 0)) {
+		ehca_err(pd->device, "bad input values: fmr_attr->max_pages=%x "
+			 "fmr_attr->max_maps=%x fmr_attr->page_shift=%x",
+			 fmr_attr->max_pages, fmr_attr->max_maps,
+			 fmr_attr->page_shift);
+		ib_fmr = ERR_PTR(-EINVAL);
+		goto alloc_fmr_exit0;
+	}
+	if (((1 << fmr_attr->page_shift) != EHCA_PAGESIZE) &&
+	    ((1 << fmr_attr->page_shift) != PAGE_SIZE)) {
+		ehca_err(pd->device, "unsupported fmr_attr->page_shift=%x",
+			 fmr_attr->page_shift);
+		ib_fmr = ERR_PTR(-EINVAL);
+		goto alloc_fmr_exit0;
+	}
+
+	e_fmr = ehca_mr_new();
+	if (!e_fmr) {
+		ib_fmr = ERR_PTR(-ENOMEM);
+		goto alloc_fmr_exit0;
+	}
+	e_fmr->flags |= EHCA_MR_FLAG_FMR;
+
+	/* register MR on HCA */
+	ret = ehca_reg_mr(shca, e_fmr, NULL,
+			  fmr_attr->max_pages * (1 << fmr_attr->page_shift),
+			  mr_access_flags, e_pd, &pginfo,
+			  &tmp_lkey, &tmp_rkey);
+	if (ret) {
+		ib_fmr = ERR_PTR(ret);
+		goto alloc_fmr_exit1;
+	}
+
+	/* successful */
+	e_fmr->fmr_page_size = 1 << fmr_attr->page_shift;
+	e_fmr->fmr_max_pages = fmr_attr->max_pages;
+	e_fmr->fmr_max_maps = fmr_attr->max_maps;
+	e_fmr->fmr_map_cnt = 0;
+	return &e_fmr->ib.ib_fmr;
+
+alloc_fmr_exit1:
+	ehca_mr_delete(e_fmr);
+alloc_fmr_exit0:
+	if (IS_ERR(ib_fmr))
+		ehca_err(pd->device, "rc=%lx pd=%p mr_access_flags=%x "
+			 "fmr_attr=%p", PTR_ERR(ib_fmr), pd,
+			 mr_access_flags, fmr_attr);
+	return ib_fmr;
+} /* end ehca_alloc_fmr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_map_phys_fmr(struct ib_fmr *fmr,
+		      u64 *page_list,
+		      int list_len,
+		      u64 iova)
+{
+	int ret;
+	struct ehca_shca *shca =
+		container_of(fmr->device, struct ehca_shca, ib_device);
+	struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
+	struct ehca_pd *e_pd = container_of(fmr->pd, struct ehca_pd, ib_pd);
+	struct ehca_mr_pginfo pginfo={0,0,0,0,0,0,0,NULL,0,NULL,NULL,0,NULL,0};
+	u32 tmp_lkey, tmp_rkey;
+
+	if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
+		ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
+			 e_fmr, e_fmr->flags);
+		ret = -EINVAL;
+		goto map_phys_fmr_exit0;
+	}
+	ret = ehca_fmr_check_page_list(e_fmr, page_list, list_len);
+	if (ret)
+		goto map_phys_fmr_exit0;
+	if (iova % e_fmr->fmr_page_size) {
+		/* only whole-numbered pages */
+		ehca_err(fmr->device, "bad iova, iova=%lx fmr_page_size=%x",
+			 iova, e_fmr->fmr_page_size);
+		ret = -EINVAL;
+		goto map_phys_fmr_exit0;
+	}
+	if (e_fmr->fmr_map_cnt >= e_fmr->fmr_max_maps) {
+		/* HCAD does not limit the maps, however trace this anyway */
+		ehca_info(fmr->device, "map limit exceeded, fmr=%p "
+			  "e_fmr->fmr_map_cnt=%x e_fmr->fmr_max_maps=%x",
+			  fmr, e_fmr->fmr_map_cnt, e_fmr->fmr_max_maps);
+	}
+
+	pginfo.type      = EHCA_MR_PGI_FMR;
+	pginfo.num_pages = list_len;
+	pginfo.num_4k    = list_len * (e_fmr->fmr_page_size / EHCA_PAGESIZE);
+	pginfo.page_list = page_list;
+	pginfo.next_4k   = ((iova & (e_fmr->fmr_page_size-1)) /
+			    EHCA_PAGESIZE);
+
+	ret = ehca_rereg_mr(shca, e_fmr, (u64*)iova,
+			    list_len * e_fmr->fmr_page_size,
+			    e_fmr->acl, e_pd, &pginfo, &tmp_lkey, &tmp_rkey);
+	if (ret)
+		goto map_phys_fmr_exit0;
+
+	/* successful reregistration */
+	e_fmr->fmr_map_cnt++;
+	e_fmr->ib.ib_fmr.lkey = tmp_lkey;
+	e_fmr->ib.ib_fmr.rkey = tmp_rkey;
+	return 0;
+
+map_phys_fmr_exit0:
+	if (ret)
+		ehca_err(fmr->device, "ret=%x fmr=%p page_list=%p list_len=%x "
+			 "iova=%lx",
+			 ret, fmr, page_list, list_len, iova);
+	return ret;
+} /* end ehca_map_phys_fmr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_unmap_fmr(struct list_head *fmr_list)
+{
+	int ret = 0;
+	struct ib_fmr *ib_fmr;
+	struct ehca_shca *shca = NULL;
+	struct ehca_shca *prev_shca;
+	struct ehca_mr *e_fmr;
+	u32 num_fmr = 0;
+	u32 unmap_fmr_cnt = 0;
+
+	/* check all FMR belong to same SHCA, and check internal flag */
+	list_for_each_entry(ib_fmr, fmr_list, list) {
+		prev_shca = shca;
+		if (!ib_fmr) {
+			ehca_gen_err("bad fmr=%p in list", ib_fmr);
+			ret = -EINVAL;
+			goto unmap_fmr_exit0;
+		}
+		shca = container_of(ib_fmr->device, struct ehca_shca,
+				    ib_device);
+		e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
+		if ((shca != prev_shca) && prev_shca) {
+			ehca_err(&shca->ib_device, "SHCA mismatch, shca=%p "
+				 "prev_shca=%p e_fmr=%p",
+				 shca, prev_shca, e_fmr);
+			ret = -EINVAL;
+			goto unmap_fmr_exit0;
+		}
+		if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
+			ehca_err(&shca->ib_device, "not a FMR, e_fmr=%p "
+				 "e_fmr->flags=%x", e_fmr, e_fmr->flags);
+			ret = -EINVAL;
+			goto unmap_fmr_exit0;
+		}
+		num_fmr++;
+	}
+
+	/* loop over all FMRs to unmap */
+	list_for_each_entry(ib_fmr, fmr_list, list) {
+		unmap_fmr_cnt++;
+		e_fmr = container_of(ib_fmr, struct ehca_mr, ib.ib_fmr);
+		shca = container_of(ib_fmr->device, struct ehca_shca,
+				    ib_device);
+		ret = ehca_unmap_one_fmr(shca, e_fmr);
+		if (ret) {
+			/* unmap failed, stop unmapping of rest of FMRs */
+			ehca_err(&shca->ib_device, "unmap of one FMR failed, "
+				 "stop rest, e_fmr=%p num_fmr=%x "
+				 "unmap_fmr_cnt=%x lkey=%x", e_fmr, num_fmr,
+				 unmap_fmr_cnt, e_fmr->ib.ib_fmr.lkey);
+			goto unmap_fmr_exit0;
+		}
+	}
+
+unmap_fmr_exit0:
+	if (ret)
+		ehca_gen_err("ret=%x fmr_list=%p num_fmr=%x unmap_fmr_cnt=%x",
+			     ret, fmr_list, num_fmr, unmap_fmr_cnt);
+	return ret;
+} /* end ehca_unmap_fmr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_dealloc_fmr(struct ib_fmr *fmr)
+{
+	int ret;
+	u64 h_ret;
+	struct ehca_shca *shca =
+		container_of(fmr->device, struct ehca_shca, ib_device);
+	struct ehca_mr *e_fmr = container_of(fmr, struct ehca_mr, ib.ib_fmr);
+
+	if (!(e_fmr->flags & EHCA_MR_FLAG_FMR)) {
+		ehca_err(fmr->device, "not a FMR, e_fmr=%p e_fmr->flags=%x",
+			 e_fmr, e_fmr->flags);
+		ret = -EINVAL;
+		goto free_fmr_exit0;
+	}
+
+	h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(fmr->device, "hipz_free_mr failed, h_ret=%lx e_fmr=%p "
+			 "hca_hndl=%lx fmr_hndl=%lx fmr->lkey=%x",
+			 h_ret, e_fmr, shca->ipz_hca_handle.handle,
+			 e_fmr->ipz_mr_handle.handle, fmr->lkey);
+		ret = ehca_mrmw_map_hrc_free_mr(h_ret);
+		goto free_fmr_exit0;
+	}
+	/* successful deregistration */
+	ehca_mr_delete(e_fmr);
+	return 0;
+
+free_fmr_exit0:
+	if (ret)
+		ehca_err(&shca->ib_device, "ret=%x fmr=%p", ret, fmr);
+	return ret;
+} /* end ehca_dealloc_fmr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_reg_mr(struct ehca_shca *shca,
+		struct ehca_mr *e_mr,
+		u64 *iova_start,
+		u64 size,
+		int acl,
+		struct ehca_pd *e_pd,
+		struct ehca_mr_pginfo *pginfo,
+		u32 *lkey, /*OUT*/
+		u32 *rkey) /*OUT*/
+{
+	int ret;
+	u64 h_ret;
+	u32 hipz_acl;
+	struct ehca_mr_hipzout_parms hipzout = {{0},0,0,0,0,0};
+
+	ehca_mrmw_map_acl(acl, &hipz_acl);
+	ehca_mrmw_set_pgsize_hipz_acl(&hipz_acl);
+	if (ehca_use_hp_mr == 1)
+	        hipz_acl |= 0x00000001;
+
+	h_ret = hipz_h_alloc_resource_mr(shca->ipz_hca_handle, e_mr,
+					 (u64)iova_start, size, hipz_acl,
+					 e_pd->fw_pd, &hipzout);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(&shca->ib_device, "hipz_alloc_mr failed, h_ret=%lx "
+			 "hca_hndl=%lx", h_ret, shca->ipz_hca_handle.handle);
+		ret = ehca_mrmw_map_hrc_alloc(h_ret);
+		goto ehca_reg_mr_exit0;
+	}
+
+	e_mr->ipz_mr_handle = hipzout.handle;
+
+	ret = ehca_reg_mr_rpages(shca, e_mr, pginfo);
+	if (ret)
+		goto ehca_reg_mr_exit1;
+
+	/* successful registration */
+	e_mr->num_pages = pginfo->num_pages;
+	e_mr->num_4k    = pginfo->num_4k;
+	e_mr->start     = iova_start;
+	e_mr->size      = size;
+	e_mr->acl       = acl;
+	*lkey = hipzout.lkey;
+	*rkey = hipzout.rkey;
+	return 0;
+
+ehca_reg_mr_exit1:
+	h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(&shca->ib_device, "h_ret=%lx shca=%p e_mr=%p "
+			 "iova_start=%p size=%lx acl=%x e_pd=%p lkey=%x "
+			 "pginfo=%p num_pages=%lx num_4k=%lx ret=%x",
+			 h_ret, shca, e_mr, iova_start, size, acl, e_pd,
+			 hipzout.lkey, pginfo, pginfo->num_pages,
+			 pginfo->num_4k, ret);
+		ehca_err(&shca->ib_device, "internal error in ehca_reg_mr, "
+			 "not recoverable");
+	}
+ehca_reg_mr_exit0:
+	if (ret)
+		ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p "
+			 "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
+			 "num_pages=%lx num_4k=%lx",
+			 ret, shca, e_mr, iova_start, size, acl, e_pd, pginfo,
+			 pginfo->num_pages, pginfo->num_4k);
+	return ret;
+} /* end ehca_reg_mr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_reg_mr_rpages(struct ehca_shca *shca,
+		       struct ehca_mr *e_mr,
+		       struct ehca_mr_pginfo *pginfo)
+{
+	int ret = 0;
+	u64 h_ret;
+	u32 rnum;
+	u64 rpage;
+	u32 i;
+	u64 *kpage;
+
+	kpage = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL);
+	if (!kpage) {
+		ehca_err(&shca->ib_device, "kpage alloc failed");
+		ret = -ENOMEM;
+		goto ehca_reg_mr_rpages_exit0;
+	}
+
+	/* max 512 pages per shot */
+	for (i = 0; i < ((pginfo->num_4k + 512 - 1) / 512); i++) {
+
+		if (i == ((pginfo->num_4k + 512 - 1) / 512) - 1) {
+			rnum = pginfo->num_4k % 512; /* last shot */
+			if (rnum == 0)
+				rnum = 512;      /* last shot is full */
+		} else
+			rnum = 512;
+
+		if (rnum > 1) {
+			ret = ehca_set_pagebuf(e_mr, pginfo, rnum, kpage);
+			if (ret) {
+				ehca_err(&shca->ib_device, "ehca_set_pagebuf "
+					 "bad rc, ret=%x rnum=%x kpage=%p",
+					 ret, rnum, kpage);
+				ret = -EFAULT;
+				goto ehca_reg_mr_rpages_exit1;
+			}
+			rpage = virt_to_abs(kpage);
+			if (!rpage) {
+				ehca_err(&shca->ib_device, "kpage=%p i=%x",
+					 kpage, i);
+				ret = -EFAULT;
+				goto ehca_reg_mr_rpages_exit1;
+			}
+		} else {  /* rnum==1 */
+			ret = ehca_set_pagebuf_1(e_mr, pginfo, &rpage);
+			if (ret) {
+				ehca_err(&shca->ib_device, "ehca_set_pagebuf_1 "
+					 "bad rc, ret=%x i=%x", ret, i);
+				ret = -EFAULT;
+				goto ehca_reg_mr_rpages_exit1;
+			}
+		}
+
+		h_ret = hipz_h_register_rpage_mr(shca->ipz_hca_handle, e_mr,
+						 0, /* pagesize 4k */
+						 0, rpage, rnum);
+
+		if (i == ((pginfo->num_4k + 512 - 1) / 512) - 1) {
+			/*
+			 * check for 'registration complete'==H_SUCCESS
+			 * and for 'page registered'==H_PAGE_REGISTERED
+			 */
+			if (h_ret != H_SUCCESS) {
+				ehca_err(&shca->ib_device, "last "
+					 "hipz_reg_rpage_mr failed, h_ret=%lx "
+					 "e_mr=%p i=%x hca_hndl=%lx mr_hndl=%lx"
+					 " lkey=%x", h_ret, e_mr, i,
+					 shca->ipz_hca_handle.handle,
+					 e_mr->ipz_mr_handle.handle,
+					 e_mr->ib.ib_mr.lkey);
+				ret = ehca_mrmw_map_hrc_rrpg_last(h_ret);
+				break;
+			} else
+				ret = 0;
+		} else if (h_ret != H_PAGE_REGISTERED) {
+			ehca_err(&shca->ib_device, "hipz_reg_rpage_mr failed, "
+				 "h_ret=%lx e_mr=%p i=%x lkey=%x hca_hndl=%lx "
+				 "mr_hndl=%lx", h_ret, e_mr, i,
+				 e_mr->ib.ib_mr.lkey,
+				 shca->ipz_hca_handle.handle,
+				 e_mr->ipz_mr_handle.handle);
+			ret = ehca_mrmw_map_hrc_rrpg_notlast(h_ret);
+			break;
+		} else
+			ret = 0;
+	} /* end for(i) */
+
+
+ehca_reg_mr_rpages_exit1:
+	kfree(kpage);
+ehca_reg_mr_rpages_exit0:
+	if (ret)
+		ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p pginfo=%p "
+			 "num_pages=%lx num_4k=%lx", ret, shca, e_mr, pginfo,
+			 pginfo->num_pages, pginfo->num_4k);
+	return ret;
+} /* end ehca_reg_mr_rpages() */
+
+/*----------------------------------------------------------------------*/
+
+inline int ehca_rereg_mr_rereg1(struct ehca_shca *shca,
+				struct ehca_mr *e_mr,
+				u64 *iova_start,
+				u64 size,
+				u32 acl,
+				struct ehca_pd *e_pd,
+				struct ehca_mr_pginfo *pginfo,
+				u32 *lkey, /*OUT*/
+				u32 *rkey) /*OUT*/
+{
+	int ret;
+	u64 h_ret;
+	u32 hipz_acl;
+	u64 *kpage;
+	u64 rpage;
+	struct ehca_mr_pginfo pginfo_save;
+	struct ehca_mr_hipzout_parms hipzout = {{0},0,0,0,0,0};
+
+	ehca_mrmw_map_acl(acl, &hipz_acl);
+	ehca_mrmw_set_pgsize_hipz_acl(&hipz_acl);
+
+	kpage = kzalloc(H_CB_ALIGNMENT, GFP_KERNEL);
+	if (!kpage) {
+		ehca_err(&shca->ib_device, "kpage alloc failed");
+		ret = -ENOMEM;
+		goto ehca_rereg_mr_rereg1_exit0;
+	}
+
+	pginfo_save = *pginfo;
+	ret = ehca_set_pagebuf(e_mr, pginfo, pginfo->num_4k, kpage);
+	if (ret) {
+		ehca_err(&shca->ib_device, "set pagebuf failed, e_mr=%p "
+			 "pginfo=%p type=%x num_pages=%lx num_4k=%lx kpage=%p",
+			 e_mr, pginfo, pginfo->type, pginfo->num_pages,
+			 pginfo->num_4k,kpage);
+		goto ehca_rereg_mr_rereg1_exit1;
+	}
+	rpage = virt_to_abs(kpage);
+	if (!rpage) {
+		ehca_err(&shca->ib_device, "kpage=%p", kpage);
+		ret = -EFAULT;
+		goto ehca_rereg_mr_rereg1_exit1;
+	}
+	h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_mr,
+				      (u64)iova_start, size, hipz_acl,
+				      e_pd->fw_pd, rpage, &hipzout);
+	if (h_ret != H_SUCCESS) {
+		/*
+		 * reregistration unsuccessful, try it again with the 3 hCalls,
+		 * e.g. this is required in case H_MR_CONDITION
+		 * (MW bound or MR is shared)
+		 */
+		ehca_warn(&shca->ib_device, "hipz_h_reregister_pmr failed "
+			  "(Rereg1), h_ret=%lx e_mr=%p", h_ret, e_mr);
+		*pginfo = pginfo_save;
+		ret = -EAGAIN;
+	} else if ((u64*)hipzout.vaddr != iova_start) {
+		ehca_err(&shca->ib_device, "PHYP changed iova_start in "
+			 "rereg_pmr, iova_start=%p iova_start_out=%lx e_mr=%p "
+			 "mr_handle=%lx lkey=%x lkey_out=%x", iova_start,
+			 hipzout.vaddr, e_mr, e_mr->ipz_mr_handle.handle,
+			 e_mr->ib.ib_mr.lkey, hipzout.lkey);
+		ret = -EFAULT;
+	} else {
+		/*
+		 * successful reregistration
+		 * note: start and start_out are identical for eServer HCAs
+		 */
+		e_mr->num_pages = pginfo->num_pages;
+		e_mr->num_4k    = pginfo->num_4k;
+		e_mr->start     = iova_start;
+		e_mr->size      = size;
+		e_mr->acl       = acl;
+		*lkey = hipzout.lkey;
+		*rkey = hipzout.rkey;
+	}
+
+ehca_rereg_mr_rereg1_exit1:
+	kfree(kpage);
+ehca_rereg_mr_rereg1_exit0:
+	if ( ret && (ret != -EAGAIN) )
+		ehca_err(&shca->ib_device, "ret=%x lkey=%x rkey=%x "
+			 "pginfo=%p num_pages=%lx num_4k=%lx",
+			 ret, *lkey, *rkey, pginfo, pginfo->num_pages,
+			 pginfo->num_4k);
+	return ret;
+} /* end ehca_rereg_mr_rereg1() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_rereg_mr(struct ehca_shca *shca,
+		  struct ehca_mr *e_mr,
+		  u64 *iova_start,
+		  u64 size,
+		  int acl,
+		  struct ehca_pd *e_pd,
+		  struct ehca_mr_pginfo *pginfo,
+		  u32 *lkey,
+		  u32 *rkey)
+{
+	int ret = 0;
+	u64 h_ret;
+	int rereg_1_hcall = 1; /* 1: use hipz_h_reregister_pmr directly */
+	int rereg_3_hcall = 0; /* 1: use 3 hipz calls for reregistration */
+
+	/* first determine reregistration hCall(s) */
+	if ((pginfo->num_4k > 512) || (e_mr->num_4k > 512) ||
+	    (pginfo->num_4k > e_mr->num_4k)) {
+		ehca_dbg(&shca->ib_device, "Rereg3 case, pginfo->num_4k=%lx "
+			 "e_mr->num_4k=%x", pginfo->num_4k, e_mr->num_4k);
+		rereg_1_hcall = 0;
+		rereg_3_hcall = 1;
+	}
+
+	if (e_mr->flags & EHCA_MR_FLAG_MAXMR) {	/* check for max-MR */
+		rereg_1_hcall = 0;
+		rereg_3_hcall = 1;
+		e_mr->flags &= ~EHCA_MR_FLAG_MAXMR;
+		ehca_err(&shca->ib_device, "Rereg MR for max-MR! e_mr=%p",
+			 e_mr);
+	}
+
+	if (rereg_1_hcall) {
+		ret = ehca_rereg_mr_rereg1(shca, e_mr, iova_start, size,
+					   acl, e_pd, pginfo, lkey, rkey);
+		if (ret) {
+			if (ret == -EAGAIN)
+				rereg_3_hcall = 1;
+			else
+				goto ehca_rereg_mr_exit0;
+		}
+	}
+
+	if (rereg_3_hcall) {
+		struct ehca_mr save_mr;
+
+		/* first deregister old MR */
+		h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_mr);
+		if (h_ret != H_SUCCESS) {
+			ehca_err(&shca->ib_device, "hipz_free_mr failed, "
+				 "h_ret=%lx e_mr=%p hca_hndl=%lx mr_hndl=%lx "
+				 "mr->lkey=%x",
+				 h_ret, e_mr, shca->ipz_hca_handle.handle,
+				 e_mr->ipz_mr_handle.handle,
+				 e_mr->ib.ib_mr.lkey);
+			ret = ehca_mrmw_map_hrc_free_mr(h_ret);
+			goto ehca_rereg_mr_exit0;
+		}
+		/* clean ehca_mr_t, without changing struct ib_mr and lock */
+		save_mr = *e_mr;
+		ehca_mr_deletenew(e_mr);
+
+		/* set some MR values */
+		e_mr->flags = save_mr.flags;
+		e_mr->fmr_page_size = save_mr.fmr_page_size;
+		e_mr->fmr_max_pages = save_mr.fmr_max_pages;
+		e_mr->fmr_max_maps = save_mr.fmr_max_maps;
+		e_mr->fmr_map_cnt = save_mr.fmr_map_cnt;
+
+		ret = ehca_reg_mr(shca, e_mr, iova_start, size, acl,
+				      e_pd, pginfo, lkey, rkey);
+		if (ret) {
+			u32 offset = (u64)(&e_mr->flags) - (u64)e_mr;
+			memcpy(&e_mr->flags, &(save_mr.flags),
+			       sizeof(struct ehca_mr) - offset);
+			goto ehca_rereg_mr_exit0;
+		}
+	}
+
+ehca_rereg_mr_exit0:
+	if (ret)
+		ehca_err(&shca->ib_device, "ret=%x shca=%p e_mr=%p "
+			 "iova_start=%p size=%lx acl=%x e_pd=%p pginfo=%p "
+			 "num_pages=%lx lkey=%x rkey=%x rereg_1_hcall=%x "
+			 "rereg_3_hcall=%x", ret, shca, e_mr, iova_start, size,
+			 acl, e_pd, pginfo, pginfo->num_pages, *lkey, *rkey,
+			 rereg_1_hcall, rereg_3_hcall);
+	return ret;
+} /* end ehca_rereg_mr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_unmap_one_fmr(struct ehca_shca *shca,
+		       struct ehca_mr *e_fmr)
+{
+	int ret = 0;
+	u64 h_ret;
+	int rereg_1_hcall = 1; /* 1: use hipz_mr_reregister directly */
+	int rereg_3_hcall = 0; /* 1: use 3 hipz calls for unmapping */
+	struct ehca_pd *e_pd =
+		container_of(e_fmr->ib.ib_fmr.pd, struct ehca_pd, ib_pd);
+	struct ehca_mr save_fmr;
+	u32 tmp_lkey, tmp_rkey;
+	struct ehca_mr_pginfo pginfo={0,0,0,0,0,0,0,NULL,0,NULL,NULL,0,NULL,0};
+	struct ehca_mr_hipzout_parms hipzout = {{0},0,0,0,0,0};
+
+	/* first check if reregistration hCall can be used for unmap */
+	if (e_fmr->fmr_max_pages > 512) {
+		rereg_1_hcall = 0;
+		rereg_3_hcall = 1;
+	}
+
+	if (rereg_1_hcall) {
+		/*
+		 * note: after using rereg hcall with len=0,
+		 * rereg hcall must be used again for registering pages
+		 */
+		h_ret = hipz_h_reregister_pmr(shca->ipz_hca_handle, e_fmr, 0,
+					      0, 0, e_pd->fw_pd, 0, &hipzout);
+		if (h_ret != H_SUCCESS) {
+			/*
+			 * should not happen, because length checked above,
+			 * FMRs are not shared and no MW bound to FMRs
+			 */
+			ehca_err(&shca->ib_device, "hipz_reregister_pmr failed "
+				 "(Rereg1), h_ret=%lx e_fmr=%p hca_hndl=%lx "
+				 "mr_hndl=%lx lkey=%x lkey_out=%x",
+				 h_ret, e_fmr, shca->ipz_hca_handle.handle,
+				 e_fmr->ipz_mr_handle.handle,
+				 e_fmr->ib.ib_fmr.lkey, hipzout.lkey);
+			rereg_3_hcall = 1;
+		} else {
+			/* successful reregistration */
+			e_fmr->start = NULL;
+			e_fmr->size = 0;
+			tmp_lkey = hipzout.lkey;
+			tmp_rkey = hipzout.rkey;
+		}
+	}
+
+	if (rereg_3_hcall) {
+		struct ehca_mr save_mr;
+
+		/* first free old FMR */
+		h_ret = hipz_h_free_resource_mr(shca->ipz_hca_handle, e_fmr);
+		if (h_ret != H_SUCCESS) {
+			ehca_err(&shca->ib_device, "hipz_free_mr failed, "
+				 "h_ret=%lx e_fmr=%p hca_hndl=%lx mr_hndl=%lx "
+				 "lkey=%x",
+				 h_ret, e_fmr, shca->ipz_hca_handle.handle,
+				 e_fmr->ipz_mr_handle.handle,
+				 e_fmr->ib.ib_fmr.lkey);
+			ret = ehca_mrmw_map_hrc_free_mr(h_ret);
+			goto ehca_unmap_one_fmr_exit0;
+		}
+		/* clean ehca_mr_t, without changing lock */
+		save_fmr = *e_fmr;
+		ehca_mr_deletenew(e_fmr);
+
+		/* set some MR values */
+		e_fmr->flags = save_fmr.flags;
+		e_fmr->fmr_page_size = save_fmr.fmr_page_size;
+		e_fmr->fmr_max_pages = save_fmr.fmr_max_pages;
+		e_fmr->fmr_max_maps = save_fmr.fmr_max_maps;
+		e_fmr->fmr_map_cnt = save_fmr.fmr_map_cnt;
+		e_fmr->acl = save_fmr.acl;
+
+		pginfo.type      = EHCA_MR_PGI_FMR;
+		pginfo.num_pages = 0;
+		pginfo.num_4k    = 0;
+		ret = ehca_reg_mr(shca, e_fmr, NULL,
+				  (e_fmr->fmr_max_pages * e_fmr->fmr_page_size),
+				  e_fmr->acl, e_pd, &pginfo, &tmp_lkey,
+				  &tmp_rkey);
+		if (ret) {
+			u32 offset = (u64)(&e_fmr->flags) - (u64)e_fmr;
+			memcpy(&e_fmr->flags, &(save_mr.flags),
+			       sizeof(struct ehca_mr) - offset);
+			goto ehca_unmap_one_fmr_exit0;
+		}
+	}
+
+ehca_unmap_one_fmr_exit0:
+	if (ret)
+		ehca_err(&shca->ib_device, "ret=%x tmp_lkey=%x tmp_rkey=%x "
+			 "fmr_max_pages=%x rereg_1_hcall=%x rereg_3_hcall=%x",
+			 ret, tmp_lkey, tmp_rkey, e_fmr->fmr_max_pages,
+			 rereg_1_hcall, rereg_3_hcall);
+	return ret;
+} /* end ehca_unmap_one_fmr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_reg_smr(struct ehca_shca *shca,
+		 struct ehca_mr *e_origmr,
+		 struct ehca_mr *e_newmr,
+		 u64 *iova_start,
+		 int acl,
+		 struct ehca_pd *e_pd,
+		 u32 *lkey, /*OUT*/
+		 u32 *rkey) /*OUT*/
+{
+	int ret = 0;
+	u64 h_ret;
+	u32 hipz_acl;
+	struct ehca_mr_hipzout_parms hipzout = {{0},0,0,0,0,0};
+
+	ehca_mrmw_map_acl(acl, &hipz_acl);
+	ehca_mrmw_set_pgsize_hipz_acl(&hipz_acl);
+
+	h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
+				    (u64)iova_start, hipz_acl, e_pd->fw_pd,
+				    &hipzout);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lx "
+			 "shca=%p e_origmr=%p e_newmr=%p iova_start=%p acl=%x "
+			 "e_pd=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
+			 h_ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd,
+			 shca->ipz_hca_handle.handle,
+			 e_origmr->ipz_mr_handle.handle,
+			 e_origmr->ib.ib_mr.lkey);
+		ret = ehca_mrmw_map_hrc_reg_smr(h_ret);
+		goto ehca_reg_smr_exit0;
+	}
+	/* successful registration */
+	e_newmr->num_pages     = e_origmr->num_pages;
+	e_newmr->num_4k        = e_origmr->num_4k;
+	e_newmr->start         = iova_start;
+	e_newmr->size          = e_origmr->size;
+	e_newmr->acl           = acl;
+	e_newmr->ipz_mr_handle = hipzout.handle;
+	*lkey = hipzout.lkey;
+	*rkey = hipzout.rkey;
+	return 0;
+
+ehca_reg_smr_exit0:
+	if (ret)
+		ehca_err(&shca->ib_device, "ret=%x shca=%p e_origmr=%p "
+			 "e_newmr=%p iova_start=%p acl=%x e_pd=%p",
+			 ret, shca, e_origmr, e_newmr, iova_start, acl, e_pd);
+	return ret;
+} /* end ehca_reg_smr() */
+
+/*----------------------------------------------------------------------*/
+
+/* register internal max-MR to internal SHCA */
+int ehca_reg_internal_maxmr(
+	struct ehca_shca *shca,
+	struct ehca_pd *e_pd,
+	struct ehca_mr **e_maxmr)  /*OUT*/
+{
+	int ret;
+	struct ehca_mr *e_mr;
+	u64 *iova_start;
+	u64 size_maxmr;
+	struct ehca_mr_pginfo pginfo={0,0,0,0,0,0,0,NULL,0,NULL,NULL,0,NULL,0};
+	struct ib_phys_buf ib_pbuf;
+	u32 num_pages_mr;
+	u32 num_pages_4k; /* 4k portion "pages" */
+
+	e_mr = ehca_mr_new();
+	if (!e_mr) {
+		ehca_err(&shca->ib_device, "out of memory");
+		ret = -ENOMEM;
+		goto ehca_reg_internal_maxmr_exit0;
+	}
+	e_mr->flags |= EHCA_MR_FLAG_MAXMR;
+
+	/* register internal max-MR on HCA */
+	size_maxmr = (u64)high_memory - PAGE_OFFSET;
+	iova_start = (u64*)KERNELBASE;
+	ib_pbuf.addr = 0;
+	ib_pbuf.size = size_maxmr;
+	num_pages_mr = ((((u64)iova_start % PAGE_SIZE) + size_maxmr +
+			 PAGE_SIZE - 1) / PAGE_SIZE);
+	num_pages_4k = ((((u64)iova_start % EHCA_PAGESIZE) + size_maxmr +
+			 EHCA_PAGESIZE - 1) / EHCA_PAGESIZE);
+
+	pginfo.type           = EHCA_MR_PGI_PHYS;
+	pginfo.num_pages      = num_pages_mr;
+	pginfo.num_4k         = num_pages_4k;
+	pginfo.num_phys_buf   = 1;
+	pginfo.phys_buf_array = &ib_pbuf;
+
+	ret = ehca_reg_mr(shca, e_mr, iova_start, size_maxmr, 0, e_pd,
+			  &pginfo, &e_mr->ib.ib_mr.lkey,
+			  &e_mr->ib.ib_mr.rkey);
+	if (ret) {
+		ehca_err(&shca->ib_device, "reg of internal max MR failed, "
+			 "e_mr=%p iova_start=%p size_maxmr=%lx num_pages_mr=%x "
+			 "num_pages_4k=%x", e_mr, iova_start, size_maxmr,
+			 num_pages_mr, num_pages_4k);
+		goto ehca_reg_internal_maxmr_exit1;
+	}
+
+	/* successful registration of all pages */
+	e_mr->ib.ib_mr.device = e_pd->ib_pd.device;
+	e_mr->ib.ib_mr.pd = &e_pd->ib_pd;
+	e_mr->ib.ib_mr.uobject = NULL;
+	atomic_inc(&(e_pd->ib_pd.usecnt));
+	atomic_set(&(e_mr->ib.ib_mr.usecnt), 0);
+	*e_maxmr = e_mr;
+	return 0;
+
+ehca_reg_internal_maxmr_exit1:
+	ehca_mr_delete(e_mr);
+ehca_reg_internal_maxmr_exit0:
+	if (ret)
+		ehca_err(&shca->ib_device, "ret=%x shca=%p e_pd=%p e_maxmr=%p",
+			 ret, shca, e_pd, e_maxmr);
+	return ret;
+} /* end ehca_reg_internal_maxmr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_reg_maxmr(struct ehca_shca *shca,
+		   struct ehca_mr *e_newmr,
+		   u64 *iova_start,
+		   int acl,
+		   struct ehca_pd *e_pd,
+		   u32 *lkey,
+		   u32 *rkey)
+{
+	u64 h_ret;
+	struct ehca_mr *e_origmr = shca->maxmr;
+	u32 hipz_acl;
+	struct ehca_mr_hipzout_parms hipzout = {{0},0,0,0,0,0};
+
+	ehca_mrmw_map_acl(acl, &hipz_acl);
+	ehca_mrmw_set_pgsize_hipz_acl(&hipz_acl);
+
+	h_ret = hipz_h_register_smr(shca->ipz_hca_handle, e_newmr, e_origmr,
+				    (u64)iova_start, hipz_acl, e_pd->fw_pd,
+				    &hipzout);
+	if (h_ret != H_SUCCESS) {
+		ehca_err(&shca->ib_device, "hipz_reg_smr failed, h_ret=%lx "
+			 "e_origmr=%p hca_hndl=%lx mr_hndl=%lx lkey=%x",
+			 h_ret, e_origmr, shca->ipz_hca_handle.handle,
+			 e_origmr->ipz_mr_handle.handle,
+			 e_origmr->ib.ib_mr.lkey);
+		return ehca_mrmw_map_hrc_reg_smr(h_ret);
+	}
+	/* successful registration */
+	e_newmr->num_pages     = e_origmr->num_pages;
+	e_newmr->num_4k        = e_origmr->num_4k;
+	e_newmr->start         = iova_start;
+	e_newmr->size          = e_origmr->size;
+	e_newmr->acl           = acl;
+	e_newmr->ipz_mr_handle = hipzout.handle;
+	*lkey = hipzout.lkey;
+	*rkey = hipzout.rkey;
+	return 0;
+} /* end ehca_reg_maxmr() */
+
+/*----------------------------------------------------------------------*/
+
+int ehca_dereg_internal_maxmr(struct ehca_shca *shca)
+{
+	int ret;
+	struct ehca_mr *e_maxmr;
+	struct ib_pd *ib_pd;
+
+	if (!shca->maxmr) {
+		ehca_err(&shca->ib_device, "bad call, shca=%p", shca);
+		ret = -EINVAL;
+		goto ehca_dereg_internal_maxmr_exit0;
+	}
+
+	e_maxmr = shca->maxmr;
+	ib_pd = e_maxmr->ib.ib_mr.pd;
+	shca->maxmr = NULL; /* remove internal max-MR indication from SHCA */
+
+	ret = ehca_dereg_mr(&e_maxmr->ib.ib_mr);
+	if (ret) {
+		ehca_err(&shca->ib_device, "dereg internal max-MR failed, "
+			 "ret=%x e_maxmr=%p shca=%p lkey=%x",
+			 ret, e_maxmr, shca, e_maxmr->ib.ib_mr.lkey);
+		shca->maxmr = e_maxmr;
+		goto ehca_dereg_internal_maxmr_exit0;
+	}
+
+	atomic_dec(&ib_pd->usecnt);
+
+ehca_dereg_internal_maxmr_exit0:
+	if (ret)
+		ehca_err(&shca->ib_device, "ret=%x shca=%p shca->maxmr=%p",
+			 ret, shca, shca->maxmr);
+	return ret;
+} /* end ehca_dereg_internal_maxmr() */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * check physical buffer array of MR verbs for validness and
+ * calculates MR size
+ */
+int ehca_mr_chk_buf_and_calc_size(struct ib_phys_buf *phys_buf_array,
+				  int num_phys_buf,
+				  u64 *iova_start,
+				  u64 *size)
+{
+	struct ib_phys_buf *pbuf = phys_buf_array;
+	u64 size_count = 0;
+	u32 i;
+
+	if (num_phys_buf == 0) {
+		ehca_gen_err("bad phys buf array len, num_phys_buf=0");
+		return -EINVAL;
+	}
+	/* check first buffer */
+	if (((u64)iova_start & ~PAGE_MASK) != (pbuf->addr & ~PAGE_MASK)) {
+		ehca_gen_err("iova_start/addr mismatch, iova_start=%p "
+			     "pbuf->addr=%lx pbuf->size=%lx",
+			     iova_start, pbuf->addr, pbuf->size);
+		return -EINVAL;
+	}
+	if (((pbuf->addr + pbuf->size) % PAGE_SIZE) &&
+	    (num_phys_buf > 1)) {
+		ehca_gen_err("addr/size mismatch in 1st buf, pbuf->addr=%lx "
+			     "pbuf->size=%lx", pbuf->addr, pbuf->size);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < num_phys_buf; i++) {
+		if ((i > 0) && (pbuf->addr % PAGE_SIZE)) {
+			ehca_gen_err("bad address, i=%x pbuf->addr=%lx "
+				     "pbuf->size=%lx",
+				     i, pbuf->addr, pbuf->size);
+			return -EINVAL;
+		}
+		if (((i > 0) &&	/* not 1st */
+		     (i < (num_phys_buf - 1)) &&	/* not last */
+		     (pbuf->size % PAGE_SIZE)) || (pbuf->size == 0)) {
+			ehca_gen_err("bad size, i=%x pbuf->size=%lx",
+				     i, pbuf->size);
+			return -EINVAL;
+		}
+		size_count += pbuf->size;
+		pbuf++;
+	}
+
+	*size = size_count;
+	return 0;
+} /* end ehca_mr_chk_buf_and_calc_size() */
+
+/*----------------------------------------------------------------------*/
+
+/* check page list of map FMR verb for validness */
+int ehca_fmr_check_page_list(struct ehca_mr *e_fmr,
+			     u64 *page_list,
+			     int list_len)
+{
+	u32 i;
+	u64 *page;
+
+	if ((list_len == 0) || (list_len > e_fmr->fmr_max_pages)) {
+		ehca_gen_err("bad list_len, list_len=%x "
+			     "e_fmr->fmr_max_pages=%x fmr=%p",
+			     list_len, e_fmr->fmr_max_pages, e_fmr);
+		return -EINVAL;
+	}
+
+	/* each page must be aligned */
+	page = page_list;
+	for (i = 0; i < list_len; i++) {
+		if (*page % e_fmr->fmr_page_size) {
+			ehca_gen_err("bad page, i=%x *page=%lx page=%p fmr=%p "
+				     "fmr_page_size=%x", i, *page, page, e_fmr,
+				     e_fmr->fmr_page_size);
+			return -EINVAL;
+		}
+		page++;
+	}
+
+	return 0;
+} /* end ehca_fmr_check_page_list() */
+
+/*----------------------------------------------------------------------*/
+
+/* setup page buffer from page info */
+int ehca_set_pagebuf(struct ehca_mr *e_mr,
+		     struct ehca_mr_pginfo *pginfo,
+		     u32 number,
+		     u64 *kpage)
+{
+	int ret = 0;
+	struct ib_umem_chunk *prev_chunk;
+	struct ib_umem_chunk *chunk;
+	struct ib_phys_buf *pbuf;
+	u64 *fmrlist;
+	u64 num4k, pgaddr, offs4k;
+	u32 i = 0;
+	u32 j = 0;
+
+	if (pginfo->type == EHCA_MR_PGI_PHYS) {
+		/* loop over desired phys_buf_array entries */
+		while (i < number) {
+			pbuf   = pginfo->phys_buf_array + pginfo->next_buf;
+			num4k  = ((pbuf->addr % EHCA_PAGESIZE) + pbuf->size +
+				  EHCA_PAGESIZE - 1) / EHCA_PAGESIZE;
+			offs4k = (pbuf->addr & ~PAGE_MASK) / EHCA_PAGESIZE;
+			while (pginfo->next_4k < offs4k + num4k) {
+				/* sanity check */
+				if ((pginfo->page_cnt >= pginfo->num_pages) ||
+				    (pginfo->page_4k_cnt >= pginfo->num_4k)) {
+					ehca_gen_err("page_cnt >= num_pages, "
+						     "page_cnt=%lx "
+						     "num_pages=%lx "
+						     "page_4k_cnt=%lx "
+						     "num_4k=%lx i=%x",
+						     pginfo->page_cnt,
+						     pginfo->num_pages,
+						     pginfo->page_4k_cnt,
+						     pginfo->num_4k, i);
+					ret = -EFAULT;
+					goto ehca_set_pagebuf_exit0;
+				}
+				*kpage = phys_to_abs(
+					(pbuf->addr & EHCA_PAGEMASK)
+					+ (pginfo->next_4k * EHCA_PAGESIZE));
+				if ( !(*kpage) && pbuf->addr ) {
+					ehca_gen_err("pbuf->addr=%lx "
+						     "pbuf->size=%lx "
+						     "next_4k=%lx", pbuf->addr,
+						     pbuf->size,
+						     pginfo->next_4k);
+					ret = -EFAULT;
+					goto ehca_set_pagebuf_exit0;
+				}
+				(pginfo->page_4k_cnt)++;
+				(pginfo->next_4k)++;
+				if (pginfo->next_4k %
+				    (PAGE_SIZE / EHCA_PAGESIZE) == 0)
+					(pginfo->page_cnt)++;
+				kpage++;
+				i++;
+				if (i >= number) break;
+			}
+			if (pginfo->next_4k >= offs4k + num4k) {
+				(pginfo->next_buf)++;
+				pginfo->next_4k = 0;
+			}
+		}
+	} else if (pginfo->type == EHCA_MR_PGI_USER) {
+		/* loop over desired chunk entries */
+		chunk      = pginfo->next_chunk;
+		prev_chunk = pginfo->next_chunk;
+		list_for_each_entry_continue(chunk,
+					     (&(pginfo->region->chunk_list)),
+					     list) {
+			for (i = pginfo->next_nmap; i < chunk->nmap; ) {
+				pgaddr = ( page_to_pfn(chunk->page_list[i].page)
+					   << PAGE_SHIFT );
+				*kpage = phys_to_abs(pgaddr +
+						     (pginfo->next_4k *
+						      EHCA_PAGESIZE));
+				if ( !(*kpage) ) {
+					ehca_gen_err("pgaddr=%lx "
+						     "chunk->page_list[i]=%lx "
+						     "i=%x next_4k=%lx mr=%p",
+						     pgaddr,
+						     (u64)sg_dma_address(
+							     &chunk->
+							     page_list[i]),
+						     i, pginfo->next_4k, e_mr);
+					ret = -EFAULT;
+					goto ehca_set_pagebuf_exit0;
+				}
+				(pginfo->page_4k_cnt)++;
+				(pginfo->next_4k)++;
+				kpage++;
+				if (pginfo->next_4k %
+				    (PAGE_SIZE / EHCA_PAGESIZE) == 0) {
+					(pginfo->page_cnt)++;
+					(pginfo->next_nmap)++;
+					pginfo->next_4k = 0;
+					i++;
+				}
+				j++;
+				if (j >= number) break;
+			}
+			if ((pginfo->next_nmap >= chunk->nmap) &&
+			    (j >= number)) {
+				pginfo->next_nmap = 0;
+				prev_chunk = chunk;
+				break;
+			} else if (pginfo->next_nmap >= chunk->nmap) {
+				pginfo->next_nmap = 0;
+				prev_chunk = chunk;
+			} else if (j >= number)
+				break;
+			else
+				prev_chunk = chunk;
+		}
+		pginfo->next_chunk =
+			list_prepare_entry(prev_chunk,
+					   (&(pginfo->region->chunk_list)),
+					   list);
+	} else if (pginfo->type == EHCA_MR_PGI_FMR) {
+		/* loop over desired page_list entries */
+		fmrlist = pginfo->page_list + pginfo->next_listelem;
+		for (i = 0; i < number; i++) {
+			*kpage = phys_to_abs((*fmrlist & EHCA_PAGEMASK) +
+					     pginfo->next_4k * EHCA_PAGESIZE);
+			if ( !(*kpage) ) {
+				ehca_gen_err("*fmrlist=%lx fmrlist=%p "
+					     "next_listelem=%lx next_4k=%lx",
+					     *fmrlist, fmrlist,
+					     pginfo->next_listelem,
+					     pginfo->next_4k);
+				ret = -EFAULT;
+				goto ehca_set_pagebuf_exit0;
+			}
+			(pginfo->page_4k_cnt)++;
+			(pginfo->next_4k)++;
+			kpage++;
+			if (pginfo->next_4k %
+			    (e_mr->fmr_page_size / EHCA_PAGESIZE) == 0) {
+				(pginfo->page_cnt)++;
+				(pginfo->next_listelem)++;
+				fmrlist++;
+				pginfo->next_4k = 0;
+			}
+		}
+	} else {
+		ehca_gen_err("bad pginfo->type=%x", pginfo->type);
+		ret = -EFAULT;
+		goto ehca_set_pagebuf_exit0;
+	}
+
+ehca_set_pagebuf_exit0:
+	if (ret)
+		ehca_gen_err("ret=%x e_mr=%p pginfo=%p type=%x num_pages=%lx "
+			     "num_4k=%lx next_buf=%lx next_4k=%lx number=%x "
+			     "kpage=%p page_cnt=%lx page_4k_cnt=%lx i=%x "
+			     "next_listelem=%lx region=%p next_chunk=%p "
+			     "next_nmap=%lx", ret, e_mr, pginfo, pginfo->type,
+			     pginfo->num_pages, pginfo->num_4k,
+			     pginfo->next_buf, pginfo->next_4k, number, kpage,
+			     pginfo->page_cnt, pginfo->page_4k_cnt, i,
+			     pginfo->next_listelem, pginfo->region,
+			     pginfo->next_chunk, pginfo->next_nmap);
+	return ret;
+} /* end ehca_set_pagebuf() */
+
+/*----------------------------------------------------------------------*/
+
+/* setup 1 page from page info page buffer */
+int ehca_set_pagebuf_1(struct ehca_mr *e_mr,
+		       struct ehca_mr_pginfo *pginfo,
+		       u64 *rpage)
+{
+	int ret = 0;
+	struct ib_phys_buf *tmp_pbuf;
+	u64 *fmrlist;
+	struct ib_umem_chunk *chunk;
+	struct ib_umem_chunk *prev_chunk;
+	u64 pgaddr, num4k, offs4k;
+
+	if (pginfo->type == EHCA_MR_PGI_PHYS) {
+		/* sanity check */
+		if ((pginfo->page_cnt >= pginfo->num_pages) ||
+		    (pginfo->page_4k_cnt >= pginfo->num_4k)) {
+			ehca_gen_err("page_cnt >= num_pages, page_cnt=%lx "
+				     "num_pages=%lx page_4k_cnt=%lx num_4k=%lx",
+				     pginfo->page_cnt, pginfo->num_pages,
+				     pginfo->page_4k_cnt, pginfo->num_4k);
+			ret = -EFAULT;
+			goto ehca_set_pagebuf_1_exit0;
+		}
+		tmp_pbuf = pginfo->phys_buf_array + pginfo->next_buf;
+		num4k  = ((tmp_pbuf->addr % EHCA_PAGESIZE) + tmp_pbuf->size +
+			  EHCA_PAGESIZE - 1) / EHCA_PAGESIZE;
+		offs4k = (tmp_pbuf->addr & ~PAGE_MASK) / EHCA_PAGESIZE;
+		*rpage = phys_to_abs((tmp_pbuf->addr & EHCA_PAGEMASK) +
+				     (pginfo->next_4k * EHCA_PAGESIZE));
+		if ( !(*rpage) && tmp_pbuf->addr ) {
+			ehca_gen_err("tmp_pbuf->addr=%lx"
+				     " tmp_pbuf->size=%lx next_4k=%lx",
+				     tmp_pbuf->addr, tmp_pbuf->size,
+				     pginfo->next_4k);
+			ret = -EFAULT;
+			goto ehca_set_pagebuf_1_exit0;
+		}
+		(pginfo->page_4k_cnt)++;
+		(pginfo->next_4k)++;
+		if (pginfo->next_4k % (PAGE_SIZE / EHCA_PAGESIZE) == 0)
+			(pginfo->page_cnt)++;
+		if (pginfo->next_4k >= offs4k + num4k) {
+			(pginfo->next_buf)++;
+			pginfo->next_4k = 0;
+		}
+	} else if (pginfo->type == EHCA_MR_PGI_USER) {
+		chunk      = pginfo->next_chunk;
+		prev_chunk = pginfo->next_chunk;
+		list_for_each_entry_continue(chunk,
+					     (&(pginfo->region->chunk_list)),
+					     list) {
+			pgaddr = ( page_to_pfn(chunk->page_list[
+						       pginfo->next_nmap].page)
+				   << PAGE_SHIFT);
+			*rpage = phys_to_abs(pgaddr +
+					     (pginfo->next_4k * EHCA_PAGESIZE));
+			if ( !(*rpage) ) {
+				ehca_gen_err("pgaddr=%lx chunk->page_list[]=%lx"
+					     " next_nmap=%lx next_4k=%lx mr=%p",
+					     pgaddr, (u64)sg_dma_address(
+						     &chunk->page_list[
+							     pginfo->
+							     next_nmap]),
+					     pginfo->next_nmap, pginfo->next_4k,
+					     e_mr);
+				ret = -EFAULT;
+				goto ehca_set_pagebuf_1_exit0;
+			}
+			(pginfo->page_4k_cnt)++;
+			(pginfo->next_4k)++;
+			if (pginfo->next_4k %
+			    (PAGE_SIZE / EHCA_PAGESIZE) == 0) {
+				(pginfo->page_cnt)++;
+				(pginfo->next_nmap)++;
+				pginfo->next_4k = 0;
+			}
+			if (pginfo->next_nmap >= chunk->nmap) {
+				pginfo->next_nmap = 0;
+				prev_chunk = chunk;
+			}
+			break;
+		}
+		pginfo->next_chunk =
+			list_prepare_entry(prev_chunk,
+					   (&(pginfo->region->chunk_list)),
+					   list);
+	} else if (pginfo->type == EHCA_MR_PGI_FMR) {
+		fmrlist = pginfo->page_list + pginfo->next_listelem;
+		*rpage = phys_to_abs((*fmrlist & EHCA_PAGEMASK) +
+				     pginfo->next_4k * EHCA_PAGESIZE);
+		if ( !(*rpage) ) {
+			ehca_gen_err("*fmrlist=%lx fmrlist=%p "
+				     "next_listelem=%lx next_4k=%lx",
+				     *fmrlist, fmrlist, pginfo->next_listelem,
+				     pginfo->next_4k);
+			ret = -EFAULT;
+			goto ehca_set_pagebuf_1_exit0;
+		}
+		(pginfo->page_4k_cnt)++;
+		(pginfo->next_4k)++;
+		if (pginfo->next_4k %
+		    (e_mr->fmr_page_size / EHCA_PAGESIZE) == 0) {
+			(pginfo->page_cnt)++;
+			(pginfo->next_listelem)++;
+			pginfo->next_4k = 0;
+		}
+	} else {
+		ehca_gen_err("bad pginfo->type=%x", pginfo->type);
+		ret = -EFAULT;
+		goto ehca_set_pagebuf_1_exit0;
+	}
+
+ehca_set_pagebuf_1_exit0:
+	if (ret)
+		ehca_gen_err("ret=%x e_mr=%p pginfo=%p type=%x num_pages=%lx "
+			     "num_4k=%lx next_buf=%lx next_4k=%lx rpage=%p "
+			     "page_cnt=%lx page_4k_cnt=%lx next_listelem=%lx "
+			     "region=%p next_chunk=%p next_nmap=%lx", ret, e_mr,
+			     pginfo, pginfo->type, pginfo->num_pages,
+			     pginfo->num_4k, pginfo->next_buf, pginfo->next_4k,
+			     rpage, pginfo->page_cnt, pginfo->page_4k_cnt,
+			     pginfo->next_listelem, pginfo->region,
+			     pginfo->next_chunk, pginfo->next_nmap);
+	return ret;
+} /* end ehca_set_pagebuf_1() */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * check MR if it is a max-MR, i.e. uses whole memory
+ * in case it's a max-MR 1 is returned, else 0
+ */
+int ehca_mr_is_maxmr(u64 size,
+		     u64 *iova_start)
+{
+	/* a MR is treated as max-MR only if it fits following: */
+	if ((size == ((u64)high_memory - PAGE_OFFSET)) &&
+	    (iova_start == (void*)KERNELBASE)) {
+		ehca_gen_dbg("this is a max-MR");
+		return 1;
+	} else
+		return 0;
+} /* end ehca_mr_is_maxmr() */
+
+/*----------------------------------------------------------------------*/
+
+/* map access control for MR/MW. This routine is used for MR and MW. */
+void ehca_mrmw_map_acl(int ib_acl,
+		       u32 *hipz_acl)
+{
+	*hipz_acl = 0;
+	if (ib_acl & IB_ACCESS_REMOTE_READ)
+		*hipz_acl |= HIPZ_ACCESSCTRL_R_READ;
+	if (ib_acl & IB_ACCESS_REMOTE_WRITE)
+		*hipz_acl |= HIPZ_ACCESSCTRL_R_WRITE;
+	if (ib_acl & IB_ACCESS_REMOTE_ATOMIC)
+		*hipz_acl |= HIPZ_ACCESSCTRL_R_ATOMIC;
+	if (ib_acl & IB_ACCESS_LOCAL_WRITE)
+		*hipz_acl |= HIPZ_ACCESSCTRL_L_WRITE;
+	if (ib_acl & IB_ACCESS_MW_BIND)
+		*hipz_acl |= HIPZ_ACCESSCTRL_MW_BIND;
+} /* end ehca_mrmw_map_acl() */
+
+/*----------------------------------------------------------------------*/
+
+/* sets page size in hipz access control for MR/MW. */
+void ehca_mrmw_set_pgsize_hipz_acl(u32 *hipz_acl) /*INOUT*/
+{
+	return; /* HCA supports only 4k */
+} /* end ehca_mrmw_set_pgsize_hipz_acl() */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * reverse map access control for MR/MW.
+ * This routine is used for MR and MW.
+ */
+void ehca_mrmw_reverse_map_acl(const u32 *hipz_acl,
+			       int *ib_acl) /*OUT*/
+{
+	*ib_acl = 0;
+	if (*hipz_acl & HIPZ_ACCESSCTRL_R_READ)
+		*ib_acl |= IB_ACCESS_REMOTE_READ;
+	if (*hipz_acl & HIPZ_ACCESSCTRL_R_WRITE)
+		*ib_acl |= IB_ACCESS_REMOTE_WRITE;
+	if (*hipz_acl & HIPZ_ACCESSCTRL_R_ATOMIC)
+		*ib_acl |= IB_ACCESS_REMOTE_ATOMIC;
+	if (*hipz_acl & HIPZ_ACCESSCTRL_L_WRITE)
+		*ib_acl |= IB_ACCESS_LOCAL_WRITE;
+	if (*hipz_acl & HIPZ_ACCESSCTRL_MW_BIND)
+		*ib_acl |= IB_ACCESS_MW_BIND;
+} /* end ehca_mrmw_reverse_map_acl() */
+
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * map HIPZ rc to IB retcodes for MR/MW allocations
+ * Used for hipz_mr_reg_alloc and hipz_mw_alloc.
+ */
+int ehca_mrmw_map_hrc_alloc(const u64 hipz_rc)
+{
+	switch (hipz_rc) {
+	case H_SUCCESS:	             /* successful completion */
+		return 0;
+	case H_ADAPTER_PARM:         /* invalid adapter handle */
+	case H_RT_PARM:              /* invalid resource type */
+	case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
+	case H_MLENGTH_PARM:         /* invalid memory length */
+	case H_MEM_ACCESS_PARM:      /* invalid access controls */
+	case H_CONSTRAINED:          /* resource constraint */
+		return -EINVAL;
+	case H_BUSY:                 /* long busy */
+		return -EBUSY;
+	default:
+		return -EINVAL;
+	}
+} /* end ehca_mrmw_map_hrc_alloc() */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * map HIPZ rc to IB retcodes for MR register rpage
+ * Used for hipz_h_register_rpage_mr at registering last page
+ */
+int ehca_mrmw_map_hrc_rrpg_last(const u64 hipz_rc)
+{
+	switch (hipz_rc) {
+	case H_SUCCESS:         /* registration complete */
+		return 0;
+	case H_PAGE_REGISTERED:	/* page registered */
+	case H_ADAPTER_PARM:    /* invalid adapter handle */
+	case H_RH_PARM:         /* invalid resource handle */
+/*	case H_QT_PARM:            invalid queue type */
+	case H_PARAMETER:       /*
+				 * invalid logical address,
+				 * or count zero or greater 512
+				 */
+	case H_TABLE_FULL:      /* page table full */
+	case H_HARDWARE:        /* HCA not operational */
+		return -EINVAL;
+	case H_BUSY:            /* long busy */
+		return -EBUSY;
+	default:
+		return -EINVAL;
+	}
+} /* end ehca_mrmw_map_hrc_rrpg_last() */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * map HIPZ rc to IB retcodes for MR register rpage
+ * Used for hipz_h_register_rpage_mr at registering one page, but not last page
+ */
+int ehca_mrmw_map_hrc_rrpg_notlast(const u64 hipz_rc)
+{
+	switch (hipz_rc) {
+	case H_PAGE_REGISTERED:	/* page registered */
+		return 0;
+	case H_SUCCESS:         /* registration complete */
+	case H_ADAPTER_PARM:    /* invalid adapter handle */
+	case H_RH_PARM:         /* invalid resource handle */
+/*	case H_QT_PARM:            invalid queue type */
+	case H_PARAMETER:       /*
+				 * invalid logical address,
+				 * or count zero or greater 512
+				 */
+	case H_TABLE_FULL:      /* page table full */
+	case H_HARDWARE:        /* HCA not operational */
+		return -EINVAL;
+	case H_BUSY:            /* long busy */
+		return -EBUSY;
+	default:
+		return -EINVAL;
+	}
+} /* end ehca_mrmw_map_hrc_rrpg_notlast() */
+
+/*----------------------------------------------------------------------*/
+
+/* map HIPZ rc to IB retcodes for MR query. Used for hipz_mr_query. */
+int ehca_mrmw_map_hrc_query_mr(const u64 hipz_rc)
+{
+	switch (hipz_rc) {
+	case H_SUCCESS:	             /* successful completion */
+		return 0;
+	case H_ADAPTER_PARM:         /* invalid adapter handle */
+	case H_RH_PARM:              /* invalid resource handle */
+		return -EINVAL;
+	case H_BUSY:                 /* long busy */
+		return -EBUSY;
+	default:
+		return -EINVAL;
+	}
+} /* end ehca_mrmw_map_hrc_query_mr() */
+
+/*----------------------------------------------------------------------*/
+/*----------------------------------------------------------------------*/
+
+/*
+ * map HIPZ rc to IB retcodes for freeing MR resource
+ * Used for hipz_h_free_resource_mr
+ */
+int ehca_mrmw_map_hrc_free_mr(const u64 hipz_rc)
+{
+	switch (hipz_rc) {
+	case H_SUCCESS:      /* resource freed */
+		return 0;
+	case H_ADAPTER_PARM: /* invalid adapter handle */
+	case H_RH_PARM:      /* invalid resource handle */
+	case H_R_STATE:      /* invalid resource state */
+	case H_HARDWARE:     /* HCA not operational */
+		return -EINVAL;
+	case H_RESOURCE:     /* Resource in use */
+	case H_BUSY:         /* long busy */
+		return -EBUSY;
+	default:
+		return -EINVAL;
+	}
+} /* end ehca_mrmw_map_hrc_free_mr() */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * map HIPZ rc to IB retcodes for freeing MW resource
+ * Used for hipz_h_free_resource_mw
+ */
+int ehca_mrmw_map_hrc_free_mw(const u64 hipz_rc)
+{
+	switch (hipz_rc) {
+	case H_SUCCESS:	     /* resource freed */
+		return 0;
+	case H_ADAPTER_PARM: /* invalid adapter handle */
+	case H_RH_PARM:      /* invalid resource handle */
+	case H_R_STATE:      /* invalid resource state */
+	case H_HARDWARE:     /* HCA not operational */
+		return -EINVAL;
+	case H_RESOURCE:     /* Resource in use */
+	case H_BUSY:         /* long busy */
+		return -EBUSY;
+	default:
+		return -EINVAL;
+	}
+} /* end ehca_mrmw_map_hrc_free_mw() */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * map HIPZ rc to IB retcodes for SMR registrations
+ * Used for hipz_h_register_smr.
+ */
+int ehca_mrmw_map_hrc_reg_smr(const u64 hipz_rc)
+{
+	switch (hipz_rc) {
+	case H_SUCCESS:	             /* successful completion */
+		return 0;
+	case H_ADAPTER_PARM:         /* invalid adapter handle */
+	case H_RH_PARM:              /* invalid resource handle */
+	case H_MEM_PARM:             /* invalid MR virtual address */
+	case H_MEM_ACCESS_PARM:      /* invalid access controls */
+	case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
+		return -EINVAL;
+	case H_BUSY:                 /* long busy */
+		return -EBUSY;
+	default:
+		return -EINVAL;
+	}
+} /* end ehca_mrmw_map_hrc_reg_smr() */
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * MR destructor and constructor
+ * used in Reregister MR verb, sets all fields in ehca_mr_t to 0,
+ * except struct ib_mr and spinlock
+ */
+void ehca_mr_deletenew(struct ehca_mr *mr)
+{
+	mr->flags         = 0;
+	mr->num_pages     = 0;
+	mr->num_4k        = 0;
+	mr->acl           = 0;
+	mr->start         = NULL;
+	mr->fmr_page_size = 0;
+	mr->fmr_max_pages = 0;
+	mr->fmr_max_maps  = 0;
+	mr->fmr_map_cnt   = 0;
+	memset(&mr->ipz_mr_handle, 0, sizeof(mr->ipz_mr_handle));
+	memset(&mr->galpas, 0, sizeof(mr->galpas));
+	mr->nr_of_pages   = 0;
+	mr->pagearray     = NULL;
+} /* end ehca_mr_deletenew() */
+
+int ehca_init_mrmw_cache(void)
+{
+	mr_cache = kmem_cache_create("ehca_cache_mr",
+				     sizeof(struct ehca_mr), 0,
+				     SLAB_HWCACHE_ALIGN,
+				     NULL, NULL);
+	if (!mr_cache)
+		return -ENOMEM;
+	mw_cache = kmem_cache_create("ehca_cache_mw",
+				     sizeof(struct ehca_mw), 0,
+				     SLAB_HWCACHE_ALIGN,
+				     NULL, NULL);
+	if (!mw_cache) {
+		kmem_cache_destroy(mr_cache);
+		mr_cache = NULL;
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+void ehca_cleanup_mrmw_cache(void)
+{
+	if (mr_cache)
+		kmem_cache_destroy(mr_cache);
+	if (mw_cache)
+		kmem_cache_destroy(mw_cache);
+}