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, 245 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_sqp.c b/drivers/infiniband/hw/ehca/ehca_sqp.c
deleted file mode 100644
index 376b031c2c7f..000000000000
--- a/drivers/infiniband/hw/ehca/ehca_sqp.c
+++ /dev/null
@@ -1,245 +0,0 @@
-/*
- *  IBM eServer eHCA Infiniband device driver for Linux on POWER
- *
- *  SQP functions
- *
- *  Authors: Khadija Souissi <souissi@de.ibm.com>
- *           Heiko J Schick <schickhj@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 <rdma/ib_mad.h>
-
-#include "ehca_classes.h"
-#include "ehca_tools.h"
-#include "ehca_iverbs.h"
-#include "hcp_if.h"
-
-#define IB_MAD_STATUS_REDIRECT		cpu_to_be16(0x0002)
-#define IB_MAD_STATUS_UNSUP_VERSION	cpu_to_be16(0x0004)
-#define IB_MAD_STATUS_UNSUP_METHOD	cpu_to_be16(0x0008)
-
-#define IB_PMA_CLASS_PORT_INFO		cpu_to_be16(0x0001)
-
-/**
- * ehca_define_sqp - Defines special queue pair 1 (GSI QP). When special queue
- * pair is created successfully, the corresponding port gets active.
- *
- * Define Special Queue pair 0 (SMI QP) is still not supported.
- *
- * @qp_init_attr: Queue pair init attributes with port and queue pair type
- */
-
-u64 ehca_define_sqp(struct ehca_shca *shca,
-		    struct ehca_qp *ehca_qp,
-		    struct ib_qp_init_attr *qp_init_attr)
-{
-	u32 pma_qp_nr, bma_qp_nr;
-	u64 ret;
-	u8 port = qp_init_attr->port_num;
-	int counter;
-
-	shca->sport[port - 1].port_state = IB_PORT_DOWN;
-
-	switch (qp_init_attr->qp_type) {
-	case IB_QPT_SMI:
-		/* function not supported yet */
-		break;
-	case IB_QPT_GSI:
-		ret = hipz_h_define_aqp1(shca->ipz_hca_handle,
-					 ehca_qp->ipz_qp_handle,
-					 ehca_qp->galpas.kernel,
-					 (u32) qp_init_attr->port_num,
-					 &pma_qp_nr, &bma_qp_nr);
-
-		if (ret != H_SUCCESS) {
-			ehca_err(&shca->ib_device,
-				 "Can't define AQP1 for port %x. h_ret=%lli",
-				 port, ret);
-			return ret;
-		}
-		shca->sport[port - 1].pma_qp_nr = pma_qp_nr;
-		ehca_dbg(&shca->ib_device, "port=%x pma_qp_nr=%x",
-			 port, pma_qp_nr);
-		break;
-	default:
-		ehca_err(&shca->ib_device, "invalid qp_type=%x",
-			 qp_init_attr->qp_type);
-		return H_PARAMETER;
-	}
-
-	if (ehca_nr_ports < 0) /* autodetect mode */
-		return H_SUCCESS;
-
-	for (counter = 0;
-	     shca->sport[port - 1].port_state != IB_PORT_ACTIVE &&
-		     counter < ehca_port_act_time;
-	     counter++) {
-		ehca_dbg(&shca->ib_device, "... wait until port %x is active",
-			 port);
-		msleep_interruptible(1000);
-	}
-
-	if (counter == ehca_port_act_time) {
-		ehca_err(&shca->ib_device, "Port %x is not active.", port);
-		return H_HARDWARE;
-	}
-
-	return H_SUCCESS;
-}
-
-struct ib_perf {
-	struct ib_mad_hdr mad_hdr;
-	u8 reserved[40];
-	u8 data[192];
-} __attribute__ ((packed));
-
-/* TC/SL/FL packed into 32 bits, as in ClassPortInfo */
-struct tcslfl {
-	u32 tc:8;
-	u32 sl:4;
-	u32 fl:20;
-} __attribute__ ((packed));
-
-/* IP Version/TC/FL packed into 32 bits, as in GRH */
-struct vertcfl {
-	u32 ver:4;
-	u32 tc:8;
-	u32 fl:20;
-} __attribute__ ((packed));
-
-static int ehca_process_perf(struct ib_device *ibdev, u8 port_num,
-			     const struct ib_wc *in_wc, const struct ib_grh *in_grh,
-			     const struct ib_mad *in_mad, struct ib_mad *out_mad)
-{
-	const struct ib_perf *in_perf = (const struct ib_perf *)in_mad;
-	struct ib_perf *out_perf = (struct ib_perf *)out_mad;
-	struct ib_class_port_info *poi =
-		(struct ib_class_port_info *)out_perf->data;
-	struct tcslfl *tcslfl =
-		(struct tcslfl *)&poi->redirect_tcslfl;
-	struct ehca_shca *shca =
-		container_of(ibdev, struct ehca_shca, ib_device);
-	struct ehca_sport *sport = &shca->sport[port_num - 1];
-
-	ehca_dbg(ibdev, "method=%x", in_perf->mad_hdr.method);
-
-	*out_mad = *in_mad;
-
-	if (in_perf->mad_hdr.class_version != 1) {
-		ehca_warn(ibdev, "Unsupported class_version=%x",
-			  in_perf->mad_hdr.class_version);
-		out_perf->mad_hdr.status = IB_MAD_STATUS_UNSUP_VERSION;
-		goto perf_reply;
-	}
-
-	switch (in_perf->mad_hdr.method) {
-	case IB_MGMT_METHOD_GET:
-	case IB_MGMT_METHOD_SET:
-		/* set class port info for redirection */
-		out_perf->mad_hdr.attr_id = IB_PMA_CLASS_PORT_INFO;
-		out_perf->mad_hdr.status = IB_MAD_STATUS_REDIRECT;
-		memset(poi, 0, sizeof(*poi));
-		poi->base_version = 1;
-		poi->class_version = 1;
-		poi->resp_time_value = 18;
-
-		/* copy local routing information from WC where applicable */
-		tcslfl->sl         = in_wc->sl;
-		poi->redirect_lid  =
-			sport->saved_attr.lid | in_wc->dlid_path_bits;
-		poi->redirect_qp   = sport->pma_qp_nr;
-		poi->redirect_qkey = IB_QP1_QKEY;
-
-		ehca_query_pkey(ibdev, port_num, in_wc->pkey_index,
-				&poi->redirect_pkey);
-
-		/* if request was globally routed, copy route info */
-		if (in_grh) {
-			const struct vertcfl *vertcfl =
-				(const struct vertcfl *)&in_grh->version_tclass_flow;
-			memcpy(poi->redirect_gid, in_grh->dgid.raw,
-			       sizeof(poi->redirect_gid));
-			tcslfl->tc        = vertcfl->tc;
-			tcslfl->fl        = vertcfl->fl;
-		} else
-			/* else only fill in default GID */
-			ehca_query_gid(ibdev, port_num, 0,
-				       (union ib_gid *)&poi->redirect_gid);
-
-		ehca_dbg(ibdev, "ehca_pma_lid=%x ehca_pma_qp=%x",
-			 sport->saved_attr.lid, sport->pma_qp_nr);
-		break;
-
-	case IB_MGMT_METHOD_GET_RESP:
-		return IB_MAD_RESULT_FAILURE;
-
-	default:
-		out_perf->mad_hdr.status = IB_MAD_STATUS_UNSUP_METHOD;
-		break;
-	}
-
-perf_reply:
-	out_perf->mad_hdr.method = IB_MGMT_METHOD_GET_RESP;
-
-	return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
-}
-
-int ehca_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
-		     const struct ib_wc *in_wc, const struct ib_grh *in_grh,
-		     const struct ib_mad_hdr *in, size_t in_mad_size,
-		     struct ib_mad_hdr *out, size_t *out_mad_size,
-		     u16 *out_mad_pkey_index)
-{
-	int ret;
-	const struct ib_mad *in_mad = (const struct ib_mad *)in;
-	struct ib_mad *out_mad = (struct ib_mad *)out;
-
-	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
-			 *out_mad_size != sizeof(*out_mad)))
-		return IB_MAD_RESULT_FAILURE;
-
-	if (!port_num || port_num > ibdev->phys_port_cnt || !in_wc)
-		return IB_MAD_RESULT_FAILURE;
-
-	/* accept only pma request */
-	if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
-		return IB_MAD_RESULT_SUCCESS;
-
-	ehca_dbg(ibdev, "port_num=%x src_qp=%x", port_num, in_wc->src_qp);
-	ret = ehca_process_perf(ibdev, port_num, in_wc, in_grh,
-				in_mad, out_mad);
-
-	return ret;
-}