IB/ehca: Deprecate driver, move to staging, schedule deletion

The ehca driver is only supported on IBM machines with a custom EBus.
As they have opted to build their newer machines using more industry
standard technology and haven't really been pushing EBus capable
machines for a while, this driver can now safely be moved to the
staging area and scheduled for eventual removal.  This plan was brought
to IBM's attention and received their sign-off.

Cc: alexs@linux.vnet.ibm.com
Cc: hnguyen@de.ibm.com
Cc: raisch@de.ibm.com
Cc: stefan.roscher@de.ibm.com
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 0 insertions, 953 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c b/drivers/infiniband/hw/ehca/ehca_reqs.c
deleted file mode 100644
index 47f94984353d..000000000000
--- a/drivers/infiniband/hw/ehca/ehca_reqs.c
+++ /dev/null
@@ -1,953 +0,0 @@
-/*
- *  IBM eServer eHCA Infiniband device driver for Linux on POWER
- *
- *  post_send/recv, poll_cq, req_notify
- *
- *  Authors: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
- *           Waleri Fomin <fomin@de.ibm.com>
- *           Joachim Fenkes <fenkes@de.ibm.com>
- *           Reinhard Ernst <rernst@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 "ehca_classes.h"
-#include "ehca_tools.h"
-#include "ehca_qes.h"
-#include "ehca_iverbs.h"
-#include "hcp_if.h"
-#include "hipz_fns.h"
-
-/* in RC traffic, insert an empty RDMA READ every this many packets */
-#define ACK_CIRC_THRESHOLD 2000000
-
-static u64 replace_wr_id(u64 wr_id, u16 idx)
-{
-	u64 ret;
-
-	ret = wr_id & ~QMAP_IDX_MASK;
-	ret |= idx & QMAP_IDX_MASK;
-
-	return ret;
-}
-
-static u16 get_app_wr_id(u64 wr_id)
-{
-	return wr_id & QMAP_IDX_MASK;
-}
-
-static inline int ehca_write_rwqe(struct ipz_queue *ipz_rqueue,
-				  struct ehca_wqe *wqe_p,
-				  struct ib_recv_wr *recv_wr,
-				  u32 rq_map_idx)
-{
-	u8 cnt_ds;
-	if (unlikely((recv_wr->num_sge < 0) ||
-		     (recv_wr->num_sge > ipz_rqueue->act_nr_of_sg))) {
-		ehca_gen_err("Invalid number of WQE SGE. "
-			 "num_sqe=%x max_nr_of_sg=%x",
-			 recv_wr->num_sge, ipz_rqueue->act_nr_of_sg);
-		return -EINVAL; /* invalid SG list length */
-	}
-
-	/* clear wqe header until sglist */
-	memset(wqe_p, 0, offsetof(struct ehca_wqe, u.ud_av.sg_list));
-
-	wqe_p->work_request_id = replace_wr_id(recv_wr->wr_id, rq_map_idx);
-	wqe_p->nr_of_data_seg = recv_wr->num_sge;
-
-	for (cnt_ds = 0; cnt_ds < recv_wr->num_sge; cnt_ds++) {
-		wqe_p->u.all_rcv.sg_list[cnt_ds].vaddr =
-			recv_wr->sg_list[cnt_ds].addr;
-		wqe_p->u.all_rcv.sg_list[cnt_ds].lkey =
-			recv_wr->sg_list[cnt_ds].lkey;
-		wqe_p->u.all_rcv.sg_list[cnt_ds].length =
-			recv_wr->sg_list[cnt_ds].length;
-	}
-
-	if (ehca_debug_level >= 3) {
-		ehca_gen_dbg("RECEIVE WQE written into ipz_rqueue=%p",
-			     ipz_rqueue);
-		ehca_dmp(wqe_p, 16*(6 + wqe_p->nr_of_data_seg), "recv wqe");
-	}
-
-	return 0;
-}
-
-#if defined(DEBUG_GSI_SEND_WR)
-
-/* need ib_mad struct */
-#include <rdma/ib_mad.h>
-
-static void trace_send_wr_ud(const struct ib_send_wr *send_wr)
-{
-	int idx;
-	int j;
-	while (send_wr) {
-		struct ib_mad_hdr *mad_hdr = send_wr->wr.ud.mad_hdr;
-		struct ib_sge *sge = send_wr->sg_list;
-		ehca_gen_dbg("send_wr#%x wr_id=%lx num_sge=%x "
-			     "send_flags=%x opcode=%x", idx, send_wr->wr_id,
-			     send_wr->num_sge, send_wr->send_flags,
-			     send_wr->opcode);
-		if (mad_hdr) {
-			ehca_gen_dbg("send_wr#%x mad_hdr base_version=%x "
-				     "mgmt_class=%x class_version=%x method=%x "
-				     "status=%x class_specific=%x tid=%lx "
-				     "attr_id=%x resv=%x attr_mod=%x",
-				     idx, mad_hdr->base_version,
-				     mad_hdr->mgmt_class,
-				     mad_hdr->class_version, mad_hdr->method,
-				     mad_hdr->status, mad_hdr->class_specific,
-				     mad_hdr->tid, mad_hdr->attr_id,
-				     mad_hdr->resv,
-				     mad_hdr->attr_mod);
-		}
-		for (j = 0; j < send_wr->num_sge; j++) {
-			u8 *data = __va(sge->addr);
-			ehca_gen_dbg("send_wr#%x sge#%x addr=%p length=%x "
-				     "lkey=%x",
-				     idx, j, data, sge->length, sge->lkey);
-			/* assume length is n*16 */
-			ehca_dmp(data, sge->length, "send_wr#%x sge#%x",
-				 idx, j);
-			sge++;
-		} /* eof for j */
-		idx++;
-		send_wr = send_wr->next;
-	} /* eof while send_wr */
-}
-
-#endif /* DEBUG_GSI_SEND_WR */
-
-static inline int ehca_write_swqe(struct ehca_qp *qp,
-				  struct ehca_wqe *wqe_p,
-				  const struct ib_send_wr *send_wr,
-				  u32 sq_map_idx,
-				  int hidden)
-{
-	u32 idx;
-	u64 dma_length;
-	struct ehca_av *my_av;
-	u32 remote_qkey = send_wr->wr.ud.remote_qkey;
-	struct ehca_qmap_entry *qmap_entry = &qp->sq_map.map[sq_map_idx];
-
-	if (unlikely((send_wr->num_sge < 0) ||
-		     (send_wr->num_sge > qp->ipz_squeue.act_nr_of_sg))) {
-		ehca_gen_err("Invalid number of WQE SGE. "
-			 "num_sqe=%x max_nr_of_sg=%x",
-			 send_wr->num_sge, qp->ipz_squeue.act_nr_of_sg);
-		return -EINVAL; /* invalid SG list length */
-	}
-
-	/* clear wqe header until sglist */
-	memset(wqe_p, 0, offsetof(struct ehca_wqe, u.ud_av.sg_list));
-
-	wqe_p->work_request_id = replace_wr_id(send_wr->wr_id, sq_map_idx);
-
-	qmap_entry->app_wr_id = get_app_wr_id(send_wr->wr_id);
-	qmap_entry->reported = 0;
-	qmap_entry->cqe_req = 0;
-
-	switch (send_wr->opcode) {
-	case IB_WR_SEND:
-	case IB_WR_SEND_WITH_IMM:
-		wqe_p->optype = WQE_OPTYPE_SEND;
-		break;
-	case IB_WR_RDMA_WRITE:
-	case IB_WR_RDMA_WRITE_WITH_IMM:
-		wqe_p->optype = WQE_OPTYPE_RDMAWRITE;
-		break;
-	case IB_WR_RDMA_READ:
-		wqe_p->optype = WQE_OPTYPE_RDMAREAD;
-		break;
-	default:
-		ehca_gen_err("Invalid opcode=%x", send_wr->opcode);
-		return -EINVAL; /* invalid opcode */
-	}
-
-	wqe_p->wqef = (send_wr->opcode) & WQEF_HIGH_NIBBLE;
-
-	wqe_p->wr_flag = 0;
-
-	if ((send_wr->send_flags & IB_SEND_SIGNALED ||
-	    qp->init_attr.sq_sig_type == IB_SIGNAL_ALL_WR)
-	    && !hidden) {
-		wqe_p->wr_flag |= WQE_WRFLAG_REQ_SIGNAL_COM;
-		qmap_entry->cqe_req = 1;
-	}
-
-	if (send_wr->opcode == IB_WR_SEND_WITH_IMM ||
-	    send_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
-		/* this might not work as long as HW does not support it */
-		wqe_p->immediate_data = be32_to_cpu(send_wr->ex.imm_data);
-		wqe_p->wr_flag |= WQE_WRFLAG_IMM_DATA_PRESENT;
-	}
-
-	wqe_p->nr_of_data_seg = send_wr->num_sge;
-
-	switch (qp->qp_type) {
-	case IB_QPT_SMI:
-	case IB_QPT_GSI:
-		/* no break is intential here */
-	case IB_QPT_UD:
-		/* IB 1.2 spec C10-15 compliance */
-		if (send_wr->wr.ud.remote_qkey & 0x80000000)
-			remote_qkey = qp->qkey;
-
-		wqe_p->destination_qp_number = send_wr->wr.ud.remote_qpn << 8;
-		wqe_p->local_ee_context_qkey = remote_qkey;
-		if (unlikely(!send_wr->wr.ud.ah)) {
-			ehca_gen_err("wr.ud.ah is NULL. qp=%p", qp);
-			return -EINVAL;
-		}
-		if (unlikely(send_wr->wr.ud.remote_qpn == 0)) {
-			ehca_gen_err("dest QP# is 0. qp=%x", qp->real_qp_num);
-			return -EINVAL;
-		}
-		my_av = container_of(send_wr->wr.ud.ah, struct ehca_av, ib_ah);
-		wqe_p->u.ud_av.ud_av = my_av->av;
-
-		/*
-		 * omitted check of IB_SEND_INLINE
-		 * since HW does not support it
-		 */
-		for (idx = 0; idx < send_wr->num_sge; idx++) {
-			wqe_p->u.ud_av.sg_list[idx].vaddr =
-				send_wr->sg_list[idx].addr;
-			wqe_p->u.ud_av.sg_list[idx].lkey =
-				send_wr->sg_list[idx].lkey;
-			wqe_p->u.ud_av.sg_list[idx].length =
-				send_wr->sg_list[idx].length;
-		} /* eof for idx */
-		if (qp->qp_type == IB_QPT_SMI ||
-		    qp->qp_type == IB_QPT_GSI)
-			wqe_p->u.ud_av.ud_av.pmtu = 1;
-		if (qp->qp_type == IB_QPT_GSI) {
-			wqe_p->pkeyi = send_wr->wr.ud.pkey_index;
-#ifdef DEBUG_GSI_SEND_WR
-			trace_send_wr_ud(send_wr);
-#endif /* DEBUG_GSI_SEND_WR */
-		}
-		break;
-
-	case IB_QPT_UC:
-		if (send_wr->send_flags & IB_SEND_FENCE)
-			wqe_p->wr_flag |= WQE_WRFLAG_FENCE;
-		/* no break is intentional here */
-	case IB_QPT_RC:
-		/* TODO: atomic not implemented */
-		wqe_p->u.nud.remote_virtual_address =
-			send_wr->wr.rdma.remote_addr;
-		wqe_p->u.nud.rkey = send_wr->wr.rdma.rkey;
-
-		/*
-		 * omitted checking of IB_SEND_INLINE
-		 * since HW does not support it
-		 */
-		dma_length = 0;
-		for (idx = 0; idx < send_wr->num_sge; idx++) {
-			wqe_p->u.nud.sg_list[idx].vaddr =
-				send_wr->sg_list[idx].addr;
-			wqe_p->u.nud.sg_list[idx].lkey =
-				send_wr->sg_list[idx].lkey;
-			wqe_p->u.nud.sg_list[idx].length =
-				send_wr->sg_list[idx].length;
-			dma_length += send_wr->sg_list[idx].length;
-		} /* eof idx */
-		wqe_p->u.nud.atomic_1st_op_dma_len = dma_length;
-
-		/* unsolicited ack circumvention */
-		if (send_wr->opcode == IB_WR_RDMA_READ) {
-			/* on RDMA read, switch on and reset counters */
-			qp->message_count = qp->packet_count = 0;
-			qp->unsol_ack_circ = 1;
-		} else
-			/* else estimate #packets */
-			qp->packet_count += (dma_length >> qp->mtu_shift) + 1;
-
-		break;
-
-	default:
-		ehca_gen_err("Invalid qptype=%x", qp->qp_type);
-		return -EINVAL;
-	}
-
-	if (ehca_debug_level >= 3) {
-		ehca_gen_dbg("SEND WQE written into queue qp=%p ", qp);
-		ehca_dmp( wqe_p, 16*(6 + wqe_p->nr_of_data_seg), "send wqe");
-	}
-	return 0;
-}
-
-/* map_ib_wc_status converts raw cqe_status to ib_wc_status */
-static inline void map_ib_wc_status(u32 cqe_status,
-				    enum ib_wc_status *wc_status)
-{
-	if (unlikely(cqe_status & WC_STATUS_ERROR_BIT)) {
-		switch (cqe_status & 0x3F) {
-		case 0x01:
-		case 0x21:
-			*wc_status = IB_WC_LOC_LEN_ERR;
-			break;
-		case 0x02:
-		case 0x22:
-			*wc_status = IB_WC_LOC_QP_OP_ERR;
-			break;
-		case 0x03:
-		case 0x23:
-			*wc_status = IB_WC_LOC_EEC_OP_ERR;
-			break;
-		case 0x04:
-		case 0x24:
-			*wc_status = IB_WC_LOC_PROT_ERR;
-			break;
-		case 0x05:
-		case 0x25:
-			*wc_status = IB_WC_WR_FLUSH_ERR;
-			break;
-		case 0x06:
-			*wc_status = IB_WC_MW_BIND_ERR;
-			break;
-		case 0x07: /* remote error - look into bits 20:24 */
-			switch ((cqe_status
-				 & WC_STATUS_REMOTE_ERROR_FLAGS) >> 11) {
-			case 0x0:
-				/*
-				 * PSN Sequence Error!
-				 * couldn't find a matching status!
-				 */
-				*wc_status = IB_WC_GENERAL_ERR;
-				break;
-			case 0x1:
-				*wc_status = IB_WC_REM_INV_REQ_ERR;
-				break;
-			case 0x2:
-				*wc_status = IB_WC_REM_ACCESS_ERR;
-				break;
-			case 0x3:
-				*wc_status = IB_WC_REM_OP_ERR;
-				break;
-			case 0x4:
-				*wc_status = IB_WC_REM_INV_RD_REQ_ERR;
-				break;
-			}
-			break;
-		case 0x08:
-			*wc_status = IB_WC_RETRY_EXC_ERR;
-			break;
-		case 0x09:
-			*wc_status = IB_WC_RNR_RETRY_EXC_ERR;
-			break;
-		case 0x0A:
-		case 0x2D:
-			*wc_status = IB_WC_REM_ABORT_ERR;
-			break;
-		case 0x0B:
-		case 0x2E:
-			*wc_status = IB_WC_INV_EECN_ERR;
-			break;
-		case 0x0C:
-		case 0x2F:
-			*wc_status = IB_WC_INV_EEC_STATE_ERR;
-			break;
-		case 0x0D:
-			*wc_status = IB_WC_BAD_RESP_ERR;
-			break;
-		case 0x10:
-			/* WQE purged */
-			*wc_status = IB_WC_WR_FLUSH_ERR;
-			break;
-		default:
-			*wc_status = IB_WC_FATAL_ERR;
-
-		}
-	} else
-		*wc_status = IB_WC_SUCCESS;
-}
-
-static inline int post_one_send(struct ehca_qp *my_qp,
-			 struct ib_send_wr *cur_send_wr,
-			 int hidden)
-{
-	struct ehca_wqe *wqe_p;
-	int ret;
-	u32 sq_map_idx;
-	u64 start_offset = my_qp->ipz_squeue.current_q_offset;
-
-	/* get pointer next to free WQE */
-	wqe_p = ipz_qeit_get_inc(&my_qp->ipz_squeue);
-	if (unlikely(!wqe_p)) {
-		/* too many posted work requests: queue overflow */
-		ehca_err(my_qp->ib_qp.device, "Too many posted WQEs "
-			 "qp_num=%x", my_qp->ib_qp.qp_num);
-		return -ENOMEM;
-	}
-
-	/*
-	 * Get the index of the WQE in the send queue. The same index is used
-	 * for writing into the sq_map.
-	 */
-	sq_map_idx = start_offset / my_qp->ipz_squeue.qe_size;
-
-	/* write a SEND WQE into the QUEUE */
-	ret = ehca_write_swqe(my_qp, wqe_p, cur_send_wr, sq_map_idx, hidden);
-	/*
-	 * if something failed,
-	 * reset the free entry pointer to the start value
-	 */
-	if (unlikely(ret)) {
-		my_qp->ipz_squeue.current_q_offset = start_offset;
-		ehca_err(my_qp->ib_qp.device, "Could not write WQE "
-			 "qp_num=%x", my_qp->ib_qp.qp_num);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-int ehca_post_send(struct ib_qp *qp,
-		   struct ib_send_wr *send_wr,
-		   struct ib_send_wr **bad_send_wr)
-{
-	struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
-	int wqe_cnt = 0;
-	int ret = 0;
-	unsigned long flags;
-
-	/* Reject WR if QP is in RESET, INIT or RTR state */
-	if (unlikely(my_qp->state < IB_QPS_RTS)) {
-		ehca_err(qp->device, "Invalid QP state  qp_state=%d qpn=%x",
-			 my_qp->state, qp->qp_num);
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/* LOCK the QUEUE */
-	spin_lock_irqsave(&my_qp->spinlock_s, flags);
-
-	/* Send an empty extra RDMA read if:
-	 *  1) there has been an RDMA read on this connection before
-	 *  2) no RDMA read occurred for ACK_CIRC_THRESHOLD link packets
-	 *  3) we can be sure that any previous extra RDMA read has been
-	 *     processed so we don't overflow the SQ
-	 */
-	if (unlikely(my_qp->unsol_ack_circ &&
-		     my_qp->packet_count > ACK_CIRC_THRESHOLD &&
-		     my_qp->message_count > my_qp->init_attr.cap.max_send_wr)) {
-		/* insert an empty RDMA READ to fix up the remote QP state */
-		struct ib_send_wr circ_wr;
-		memset(&circ_wr, 0, sizeof(circ_wr));
-		circ_wr.opcode = IB_WR_RDMA_READ;
-		post_one_send(my_qp, &circ_wr, 1); /* ignore retcode */
-		wqe_cnt++;
-		ehca_dbg(qp->device, "posted circ wr  qp_num=%x", qp->qp_num);
-		my_qp->message_count = my_qp->packet_count = 0;
-	}
-
-	/* loop processes list of send reqs */
-	while (send_wr) {
-		ret = post_one_send(my_qp, send_wr, 0);
-		if (unlikely(ret)) {
-			goto post_send_exit0;
-		}
-		wqe_cnt++;
-		send_wr = send_wr->next;
-	}
-
-post_send_exit0:
-	iosync(); /* serialize GAL register access */
-	hipz_update_sqa(my_qp, wqe_cnt);
-	if (unlikely(ret || ehca_debug_level >= 2))
-		ehca_dbg(qp->device, "ehca_qp=%p qp_num=%x wqe_cnt=%d ret=%i",
-			 my_qp, qp->qp_num, wqe_cnt, ret);
-	my_qp->message_count += wqe_cnt;
-	spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
-
-out:
-	if (ret)
-		*bad_send_wr = send_wr;
-	return ret;
-}
-
-static int internal_post_recv(struct ehca_qp *my_qp,
-			      struct ib_device *dev,
-			      struct ib_recv_wr *recv_wr,
-			      struct ib_recv_wr **bad_recv_wr)
-{
-	struct ehca_wqe *wqe_p;
-	int wqe_cnt = 0;
-	int ret = 0;
-	u32 rq_map_idx;
-	unsigned long flags;
-	struct ehca_qmap_entry *qmap_entry;
-
-	if (unlikely(!HAS_RQ(my_qp))) {
-		ehca_err(dev, "QP has no RQ  ehca_qp=%p qp_num=%x ext_type=%d",
-			 my_qp, my_qp->real_qp_num, my_qp->ext_type);
-		ret = -ENODEV;
-		goto out;
-	}
-
-	/* LOCK the QUEUE */
-	spin_lock_irqsave(&my_qp->spinlock_r, flags);
-
-	/* loop processes list of recv reqs */
-	while (recv_wr) {
-		u64 start_offset = my_qp->ipz_rqueue.current_q_offset;
-		/* get pointer next to free WQE */
-		wqe_p = ipz_qeit_get_inc(&my_qp->ipz_rqueue);
-		if (unlikely(!wqe_p)) {
-			/* too many posted work requests: queue overflow */
-			ret = -ENOMEM;
-			ehca_err(dev, "Too many posted WQEs "
-				"qp_num=%x", my_qp->real_qp_num);
-			goto post_recv_exit0;
-		}
-		/*
-		 * Get the index of the WQE in the recv queue. The same index
-		 * is used for writing into the rq_map.
-		 */
-		rq_map_idx = start_offset / my_qp->ipz_rqueue.qe_size;
-
-		/* write a RECV WQE into the QUEUE */
-		ret = ehca_write_rwqe(&my_qp->ipz_rqueue, wqe_p, recv_wr,
-				rq_map_idx);
-		/*
-		 * if something failed,
-		 * reset the free entry pointer to the start value
-		 */
-		if (unlikely(ret)) {
-			my_qp->ipz_rqueue.current_q_offset = start_offset;
-			ret = -EINVAL;
-			ehca_err(dev, "Could not write WQE "
-				"qp_num=%x", my_qp->real_qp_num);
-			goto post_recv_exit0;
-		}
-
-		qmap_entry = &my_qp->rq_map.map[rq_map_idx];
-		qmap_entry->app_wr_id = get_app_wr_id(recv_wr->wr_id);
-		qmap_entry->reported = 0;
-		qmap_entry->cqe_req = 1;
-
-		wqe_cnt++;
-		recv_wr = recv_wr->next;
-	} /* eof for recv_wr */
-
-post_recv_exit0:
-	iosync(); /* serialize GAL register access */
-	hipz_update_rqa(my_qp, wqe_cnt);
-	if (unlikely(ret || ehca_debug_level >= 2))
-	    ehca_dbg(dev, "ehca_qp=%p qp_num=%x wqe_cnt=%d ret=%i",
-		     my_qp, my_qp->real_qp_num, wqe_cnt, ret);
-	spin_unlock_irqrestore(&my_qp->spinlock_r, flags);
-
-out:
-	if (ret)
-		*bad_recv_wr = recv_wr;
-
-	return ret;
-}
-
-int ehca_post_recv(struct ib_qp *qp,
-		   struct ib_recv_wr *recv_wr,
-		   struct ib_recv_wr **bad_recv_wr)
-{
-	struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
-
-	/* Reject WR if QP is in RESET state */
-	if (unlikely(my_qp->state == IB_QPS_RESET)) {
-		ehca_err(qp->device, "Invalid QP state  qp_state=%d qpn=%x",
-			 my_qp->state, qp->qp_num);
-		*bad_recv_wr = recv_wr;
-		return -EINVAL;
-	}
-
-	return internal_post_recv(my_qp, qp->device, recv_wr, bad_recv_wr);
-}
-
-int ehca_post_srq_recv(struct ib_srq *srq,
-		       struct ib_recv_wr *recv_wr,
-		       struct ib_recv_wr **bad_recv_wr)
-{
-	return internal_post_recv(container_of(srq, struct ehca_qp, ib_srq),
-				  srq->device, recv_wr, bad_recv_wr);
-}
-
-/*
- * ib_wc_opcode table converts ehca wc opcode to ib
- * Since we use zero to indicate invalid opcode, the actual ib opcode must
- * be decremented!!!
- */
-static const u8 ib_wc_opcode[255] = {
-	[0x01] = IB_WC_RECV+1,
-	[0x02] = IB_WC_RECV_RDMA_WITH_IMM+1,
-	[0x04] = IB_WC_BIND_MW+1,
-	[0x08] = IB_WC_FETCH_ADD+1,
-	[0x10] = IB_WC_COMP_SWAP+1,
-	[0x20] = IB_WC_RDMA_WRITE+1,
-	[0x40] = IB_WC_RDMA_READ+1,
-	[0x80] = IB_WC_SEND+1
-};
-
-/* internal function to poll one entry of cq */
-static inline int ehca_poll_cq_one(struct ib_cq *cq, struct ib_wc *wc)
-{
-	int ret = 0, qmap_tail_idx;
-	struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
-	struct ehca_cqe *cqe;
-	struct ehca_qp *my_qp;
-	struct ehca_qmap_entry *qmap_entry;
-	struct ehca_queue_map *qmap;
-	int cqe_count = 0, is_error;
-
-repoll:
-	cqe = (struct ehca_cqe *)
-		ipz_qeit_get_inc_valid(&my_cq->ipz_queue);
-	if (!cqe) {
-		ret = -EAGAIN;
-		if (ehca_debug_level >= 3)
-			ehca_dbg(cq->device, "Completion queue is empty  "
-				 "my_cq=%p cq_num=%x", my_cq, my_cq->cq_number);
-		goto poll_cq_one_exit0;
-	}
-
-	/* prevents loads being reordered across this point */
-	rmb();
-
-	cqe_count++;
-	if (unlikely(cqe->status & WC_STATUS_PURGE_BIT)) {
-		struct ehca_qp *qp;
-		int purgeflag;
-		unsigned long flags;
-
-		qp = ehca_cq_get_qp(my_cq, cqe->local_qp_number);
-		if (!qp) {
-			ehca_err(cq->device, "cq_num=%x qp_num=%x "
-				 "could not find qp -> ignore cqe",
-				 my_cq->cq_number, cqe->local_qp_number);
-			ehca_dmp(cqe, 64, "cq_num=%x qp_num=%x",
-				 my_cq->cq_number, cqe->local_qp_number);
-			/* ignore this purged cqe */
-			goto repoll;
-		}
-		spin_lock_irqsave(&qp->spinlock_s, flags);
-		purgeflag = qp->sqerr_purgeflag;
-		spin_unlock_irqrestore(&qp->spinlock_s, flags);
-
-		if (purgeflag) {
-			ehca_dbg(cq->device,
-				 "Got CQE with purged bit qp_num=%x src_qp=%x",
-				 cqe->local_qp_number, cqe->remote_qp_number);
-			if (ehca_debug_level >= 2)
-				ehca_dmp(cqe, 64, "qp_num=%x src_qp=%x",
-					 cqe->local_qp_number,
-					 cqe->remote_qp_number);
-			/*
-			 * ignore this to avoid double cqes of bad wqe
-			 * that caused sqe and turn off purge flag
-			 */
-			qp->sqerr_purgeflag = 0;
-			goto repoll;
-		}
-	}
-
-	is_error = cqe->status & WC_STATUS_ERROR_BIT;
-
-	/* trace error CQEs if debug_level >= 1, trace all CQEs if >= 3 */
-	if (unlikely(ehca_debug_level >= 3 || (ehca_debug_level && is_error))) {
-		ehca_dbg(cq->device,
-			 "Received %sCOMPLETION ehca_cq=%p cq_num=%x -----",
-			 is_error ? "ERROR " : "", my_cq, my_cq->cq_number);
-		ehca_dmp(cqe, 64, "ehca_cq=%p cq_num=%x",
-			 my_cq, my_cq->cq_number);
-		ehca_dbg(cq->device,
-			 "ehca_cq=%p cq_num=%x -------------------------",
-			 my_cq, my_cq->cq_number);
-	}
-
-	read_lock(&ehca_qp_idr_lock);
-	my_qp = idr_find(&ehca_qp_idr, cqe->qp_token);
-	read_unlock(&ehca_qp_idr_lock);
-	if (!my_qp)
-		goto repoll;
-	wc->qp = &my_qp->ib_qp;
-
-	qmap_tail_idx = get_app_wr_id(cqe->work_request_id);
-	if (!(cqe->w_completion_flags & WC_SEND_RECEIVE_BIT))
-		/* We got a send completion. */
-		qmap = &my_qp->sq_map;
-	else
-		/* We got a receive completion. */
-		qmap = &my_qp->rq_map;
-
-	/* advance the tail pointer */
-	qmap->tail = qmap_tail_idx;
-
-	if (is_error) {
-		/*
-		 * set left_to_poll to 0 because in error state, we will not
-		 * get any additional CQEs
-		 */
-		my_qp->sq_map.next_wqe_idx = next_index(my_qp->sq_map.tail,
-							my_qp->sq_map.entries);
-		my_qp->sq_map.left_to_poll = 0;
-		ehca_add_to_err_list(my_qp, 1);
-
-		my_qp->rq_map.next_wqe_idx = next_index(my_qp->rq_map.tail,
-							my_qp->rq_map.entries);
-		my_qp->rq_map.left_to_poll = 0;
-		if (HAS_RQ(my_qp))
-			ehca_add_to_err_list(my_qp, 0);
-	}
-
-	qmap_entry = &qmap->map[qmap_tail_idx];
-	if (qmap_entry->reported) {
-		ehca_warn(cq->device, "Double cqe on qp_num=%#x",
-				my_qp->real_qp_num);
-		/* found a double cqe, discard it and read next one */
-		goto repoll;
-	}
-
-	wc->wr_id = replace_wr_id(cqe->work_request_id, qmap_entry->app_wr_id);
-	qmap_entry->reported = 1;
-
-	/* if left_to_poll is decremented to 0, add the QP to the error list */
-	if (qmap->left_to_poll > 0) {
-		qmap->left_to_poll--;
-		if ((my_qp->sq_map.left_to_poll == 0) &&
-				(my_qp->rq_map.left_to_poll == 0)) {
-			ehca_add_to_err_list(my_qp, 1);
-			if (HAS_RQ(my_qp))
-				ehca_add_to_err_list(my_qp, 0);
-		}
-	}
-
-	/* eval ib_wc_opcode */
-	wc->opcode = ib_wc_opcode[cqe->optype]-1;
-	if (unlikely(wc->opcode == -1)) {
-		ehca_err(cq->device, "Invalid cqe->OPType=%x cqe->status=%x "
-			 "ehca_cq=%p cq_num=%x",
-			 cqe->optype, cqe->status, my_cq, my_cq->cq_number);
-		/* dump cqe for other infos */
-		ehca_dmp(cqe, 64, "ehca_cq=%p cq_num=%x",
-			 my_cq, my_cq->cq_number);
-		/* update also queue adder to throw away this entry!!! */
-		goto repoll;
-	}
-
-	/* eval ib_wc_status */
-	if (unlikely(is_error)) {
-		/* complete with errors */
-		map_ib_wc_status(cqe->status, &wc->status);
-		wc->vendor_err = wc->status;
-	} else
-		wc->status = IB_WC_SUCCESS;
-
-	wc->byte_len = cqe->nr_bytes_transferred;
-	wc->pkey_index = cqe->pkey_index;
-	wc->slid = cqe->rlid;
-	wc->dlid_path_bits = cqe->dlid;
-	wc->src_qp = cqe->remote_qp_number;
-	/*
-	 * HW has "Immed data present" and "GRH present" in bits 6 and 5.
-	 * SW defines those in bits 1 and 0, so we can just shift and mask.
-	 */
-	wc->wc_flags = (cqe->w_completion_flags >> 5) & 3;
-	wc->ex.imm_data = cpu_to_be32(cqe->immediate_data);
-	wc->sl = cqe->service_level;
-
-poll_cq_one_exit0:
-	if (cqe_count > 0)
-		hipz_update_feca(my_cq, cqe_count);
-
-	return ret;
-}
-
-static int generate_flush_cqes(struct ehca_qp *my_qp, struct ib_cq *cq,
-			       struct ib_wc *wc, int num_entries,
-			       struct ipz_queue *ipz_queue, int on_sq)
-{
-	int nr = 0;
-	struct ehca_wqe *wqe;
-	u64 offset;
-	struct ehca_queue_map *qmap;
-	struct ehca_qmap_entry *qmap_entry;
-
-	if (on_sq)
-		qmap = &my_qp->sq_map;
-	else
-		qmap = &my_qp->rq_map;
-
-	qmap_entry = &qmap->map[qmap->next_wqe_idx];
-
-	while ((nr < num_entries) && (qmap_entry->reported == 0)) {
-		/* generate flush CQE */
-
-		memset(wc, 0, sizeof(*wc));
-
-		offset = qmap->next_wqe_idx * ipz_queue->qe_size;
-		wqe = (struct ehca_wqe *)ipz_qeit_calc(ipz_queue, offset);
-		if (!wqe) {
-			ehca_err(cq->device, "Invalid wqe offset=%#llx on "
-				 "qp_num=%#x", offset, my_qp->real_qp_num);
-			return nr;
-		}
-
-		wc->wr_id = replace_wr_id(wqe->work_request_id,
-					  qmap_entry->app_wr_id);
-
-		if (on_sq) {
-			switch (wqe->optype) {
-			case WQE_OPTYPE_SEND:
-				wc->opcode = IB_WC_SEND;
-				break;
-			case WQE_OPTYPE_RDMAWRITE:
-				wc->opcode = IB_WC_RDMA_WRITE;
-				break;
-			case WQE_OPTYPE_RDMAREAD:
-				wc->opcode = IB_WC_RDMA_READ;
-				break;
-			default:
-				ehca_err(cq->device, "Invalid optype=%x",
-						wqe->optype);
-				return nr;
-			}
-		} else
-			wc->opcode = IB_WC_RECV;
-
-		if (wqe->wr_flag & WQE_WRFLAG_IMM_DATA_PRESENT) {
-			wc->ex.imm_data = wqe->immediate_data;
-			wc->wc_flags |= IB_WC_WITH_IMM;
-		}
-
-		wc->status = IB_WC_WR_FLUSH_ERR;
-
-		wc->qp = &my_qp->ib_qp;
-
-		/* mark as reported and advance next_wqe pointer */
-		qmap_entry->reported = 1;
-		qmap->next_wqe_idx = next_index(qmap->next_wqe_idx,
-						qmap->entries);
-		qmap_entry = &qmap->map[qmap->next_wqe_idx];
-
-		wc++; nr++;
-	}
-
-	return nr;
-
-}
-
-int ehca_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc)
-{
-	struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
-	int nr;
-	struct ehca_qp *err_qp;
-	struct ib_wc *current_wc = wc;
-	int ret = 0;
-	unsigned long flags;
-	int entries_left = num_entries;
-
-	if (num_entries < 1) {
-		ehca_err(cq->device, "Invalid num_entries=%d ehca_cq=%p "
-			 "cq_num=%x", num_entries, my_cq, my_cq->cq_number);
-		ret = -EINVAL;
-		goto poll_cq_exit0;
-	}
-
-	spin_lock_irqsave(&my_cq->spinlock, flags);
-
-	/* generate flush cqes for send queues */
-	list_for_each_entry(err_qp, &my_cq->sqp_err_list, sq_err_node) {
-		nr = generate_flush_cqes(err_qp, cq, current_wc, entries_left,
-				&err_qp->ipz_squeue, 1);
-		entries_left -= nr;
-		current_wc += nr;
-
-		if (entries_left == 0)
-			break;
-	}
-
-	/* generate flush cqes for receive queues */
-	list_for_each_entry(err_qp, &my_cq->rqp_err_list, rq_err_node) {
-		nr = generate_flush_cqes(err_qp, cq, current_wc, entries_left,
-				&err_qp->ipz_rqueue, 0);
-		entries_left -= nr;
-		current_wc += nr;
-
-		if (entries_left == 0)
-			break;
-	}
-
-	for (nr = 0; nr < entries_left; nr++) {
-		ret = ehca_poll_cq_one(cq, current_wc);
-		if (ret)
-			break;
-		current_wc++;
-	} /* eof for nr */
-	entries_left -= nr;
-
-	spin_unlock_irqrestore(&my_cq->spinlock, flags);
-	if (ret == -EAGAIN  || !ret)
-		ret = num_entries - entries_left;
-
-poll_cq_exit0:
-	return ret;
-}
-
-int ehca_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags notify_flags)
-{
-	struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
-	int ret = 0;
-
-	switch (notify_flags & IB_CQ_SOLICITED_MASK) {
-	case IB_CQ_SOLICITED:
-		hipz_set_cqx_n0(my_cq, 1);
-		break;
-	case IB_CQ_NEXT_COMP:
-		hipz_set_cqx_n1(my_cq, 1);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	if (notify_flags & IB_CQ_REPORT_MISSED_EVENTS) {
-		unsigned long spl_flags;
-		spin_lock_irqsave(&my_cq->spinlock, spl_flags);
-		ret = ipz_qeit_is_valid(&my_cq->ipz_queue);
-		spin_unlock_irqrestore(&my_cq->spinlock, spl_flags);
-	}
-
-	return ret;
-}