drivers/infiniband/hw/ocrdma/ocrdma_ah.c - third_party/linux - Git at Google

 /* This file is part of the Emulex RoCE Device Driver for
  * RoCE (RDMA over Converged Ethernet) adapters.
  * Copyright (C) 2012-2015 Emulex. All rights reserved.
  * EMULEX and SLI are trademarks of Emulex.
  * www.emulex.com
  *
  * This software is available to you under a choice of one of two licenses.
  * You may choose to be licensed under the terms of the GNU General Public
  * License (GPL) Version 2, available from the file COPYING in the main
  * directory of this source tree, or the BSD license below:
  *
  * 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 HOLDER 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.
  *
  * Contact Information:
  * linux-drivers@emulex.com
  *
  * Emulex
  * 3333 Susan Street
  * Costa Mesa, CA 92626
  */

 #include <net/neighbour.h>
 #include <net/netevent.h>

 #include <rdma/ib_addr.h>
 #include <rdma/ib_mad.h>
 #include <rdma/ib_cache.h>

 #include "ocrdma.h"
 #include "ocrdma_verbs.h"
 #include "ocrdma_ah.h"
 #include "ocrdma_hw.h"
 #include "ocrdma_stats.h"

 #define OCRDMA_VID_PCP_SHIFT	0xD

 static u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type)
 {
 	switch (hdr_type) {
 	case OCRDMA_L3_TYPE_IB_GRH:
 		return (u16)0x8915;
 	case OCRDMA_L3_TYPE_IPV4:
 		return (u16)0x0800;
 	case OCRDMA_L3_TYPE_IPV6:
 		return (u16)0x86dd;
 	default:
 		pr_err("ocrdma%d: Invalid network header\n", devid);
 		return 0;
 	}
 }

 static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
 			struct ib_ah_attr *attr, union ib_gid *sgid,
 			int pdid, bool *isvlan, u16 vlan_tag)
 {
 	int status;
 	struct ocrdma_eth_vlan eth;
 	struct ocrdma_grh grh;
 	int eth_sz;
 	u16 proto_num = 0;
 	u8 nxthdr = 0x11;
 	struct iphdr ipv4;
 	union {
 		struct sockaddr     _sockaddr;
 		struct sockaddr_in  _sockaddr_in;
 		struct sockaddr_in6 _sockaddr_in6;
 	} sgid_addr, dgid_addr;

 	memset(&eth, 0, sizeof(eth));
 	memset(&grh, 0, sizeof(grh));

 	/* Protocol Number */
 	proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type);
 	if (!proto_num)
 		return -EINVAL;
 	nxthdr = (proto_num == 0x8915) ? 0x1b : 0x11;
 	/* VLAN */
 	if (!vlan_tag || (vlan_tag > 0xFFF))
 		vlan_tag = dev->pvid;
 	if (vlan_tag || dev->pfc_state) {
 		if (!vlan_tag) {
 			pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
 				dev->id);
 			pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
 				dev->id);
 		}
 		eth.eth_type = cpu_to_be16(0x8100);
 		eth.roce_eth_type = cpu_to_be16(proto_num);
 		vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
 		eth.vlan_tag = cpu_to_be16(vlan_tag);
 		eth_sz = sizeof(struct ocrdma_eth_vlan);
 		*isvlan = true;
 	} else {
 		eth.eth_type = cpu_to_be16(proto_num);
 		eth_sz = sizeof(struct ocrdma_eth_basic);
 	}
 	/* MAC */
 	memcpy(&eth.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
 	status = ocrdma_resolve_dmac(dev, attr, &eth.dmac[0]);
 	if (status)
 		return status;
 	ah->sgid_index = attr->grh.sgid_index;
 	/* Eth HDR */
 	memcpy(&ah->av->eth_hdr, &eth, eth_sz);
 	if (ah->hdr_type == RDMA_NETWORK_IPV4) {
 		*((__be16 *)&ipv4) = htons((4 << 12) | (5 << 8) |
 					   attr->grh.traffic_class);
 		ipv4.id = cpu_to_be16(pdid);
 		ipv4.frag_off = htons(IP_DF);
 		ipv4.tot_len = htons(0);
 		ipv4.ttl = attr->grh.hop_limit;
 		ipv4.protocol = nxthdr;
 		rdma_gid2ip(&sgid_addr._sockaddr, sgid);
 		ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr;
 		rdma_gid2ip(&dgid_addr._sockaddr, &attr->grh.dgid);
 		ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr;
 		memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr));
 	} else {
 		memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
 		grh.tclass_flow = cpu_to_be32((6 << 28) |
 					      (attr->grh.traffic_class << 24) |
 					      attr->grh.flow_label);
 		memcpy(&grh.dgid[0], attr->grh.dgid.raw,
 		       sizeof(attr->grh.dgid.raw));
 		grh.pdid_hoplimit = cpu_to_be32((pdid << 16) |
 						(nxthdr << 8) |
 						attr->grh.hop_limit);
 		memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
 	}
 	if (*isvlan)
 		ah->av->valid |= OCRDMA_AV_VLAN_VALID;
 	ah->av->valid = cpu_to_le32(ah->av->valid);
 	return status;
 }

 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
 {
 	u32 *ahid_addr;
 	int status;
 	struct ocrdma_ah *ah;
 	bool isvlan = false;
 	u16 vlan_tag = 0xffff;
 	struct ib_gid_attr sgid_attr;
 	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
 	struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
 	union ib_gid sgid;

 	if (!(attr->ah_flags & IB_AH_GRH))
 		return ERR_PTR(-EINVAL);

 	if (atomic_cmpxchg(&dev->update_sl, 1, 0))
 		ocrdma_init_service_level(dev);

 	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
 	if (!ah)
 		return ERR_PTR(-ENOMEM);

 	status = ocrdma_alloc_av(dev, ah);
 	if (status)
 		goto av_err;

 	status = ib_get_cached_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid,
 				   &sgid_attr);
 	if (status) {
 		pr_err("%s(): Failed to query sgid, status = %d\n",
 		      __func__, status);
 		goto av_conf_err;
 	}
 	if (sgid_attr.ndev) {
 		if (is_vlan_dev(sgid_attr.ndev))
 			vlan_tag = vlan_dev_vlan_id(sgid_attr.ndev);
 		dev_put(sgid_attr.ndev);
 	}
 	/* Get network header type for this GID */
 	ah->hdr_type = ib_gid_to_network_type(sgid_attr.gid_type, &sgid);

 	if ((pd->uctx) &&
 	    (!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) &&
 	    (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
 		status = rdma_addr_find_l2_eth_by_grh(&sgid, &attr->grh.dgid,
 						      attr->dmac, &vlan_tag,
 						      &sgid_attr.ndev->ifindex,
 						      NULL);
 		if (status) {
 			pr_err("%s(): Failed to resolve dmac from gid."
 				"status = %d\n", __func__, status);
 			goto av_conf_err;
 		}
 	}

 	status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan, vlan_tag);
 	if (status)
 		goto av_conf_err;

 	/* if pd is for the user process, pass the ah_id to user space */
 	if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
 		ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
 		*ahid_addr = 0;
 		*ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
 		if (ocrdma_is_udp_encap_supported(dev)) {
 			*ahid_addr |= ((u32)ah->hdr_type &
 				       OCRDMA_AH_L3_TYPE_MASK) <<
 				       OCRDMA_AH_L3_TYPE_SHIFT;
 		}
 		if (isvlan)
 			*ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
 				       OCRDMA_AH_VLAN_VALID_SHIFT);
 	}

 	return &ah->ibah;

 av_conf_err:
 	ocrdma_free_av(dev, ah);
 av_err:
 	kfree(ah);
 	return ERR_PTR(status);
 }

 int ocrdma_destroy_ah(struct ib_ah *ibah)
 {
 	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
 	struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);

 	ocrdma_free_av(dev, ah);
 	kfree(ah);
 	return 0;
 }

 int ocrdma_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
 {
 	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
 	struct ocrdma_av *av = ah->av;
 	struct ocrdma_grh *grh;
 	attr->ah_flags |= IB_AH_GRH;
 	if (ah->av->valid & OCRDMA_AV_VALID) {
 		grh = (struct ocrdma_grh *)((u8 *)ah->av +
 				sizeof(struct ocrdma_eth_vlan));
 		attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
 	} else {
 		grh = (struct ocrdma_grh *)((u8 *)ah->av +
 					sizeof(struct ocrdma_eth_basic));
 		attr->sl = 0;
 	}
 	memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
 	attr->grh.sgid_index = ah->sgid_index;
 	attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
 	attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
 	attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
 	return 0;
 }

 int ocrdma_modify_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
 {
 	/* modify_ah is unsupported */
 	return -ENOSYS;
 }

 int ocrdma_process_mad(struct ib_device *ibdev,
 		       int process_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 status;
 	struct ocrdma_dev *dev;
 	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;

 	switch (in_mad->mad_hdr.mgmt_class) {
 	case IB_MGMT_CLASS_PERF_MGMT:
 		dev = get_ocrdma_dev(ibdev);
 		if (!ocrdma_pma_counters(dev, out_mad))
 			status = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 		else
 			status = IB_MAD_RESULT_SUCCESS;
 		break;
 	default:
 		status = IB_MAD_RESULT_SUCCESS;
 		break;
 	}
 	return status;
 }
	/* This file is part of the Emulex RoCE Device Driver for
	* RoCE (RDMA over Converged Ethernet) adapters.
	* Copyright (C) 2012-2015 Emulex. All rights reserved.
	* EMULEX and SLI are trademarks of Emulex.
	* www.emulex.com
	*
	* This software is available to you under a choice of one of two licenses.
	* You may choose to be licensed under the terms of the GNU General Public
	* License (GPL) Version 2, available from the file COPYING in the main
	* directory of this source tree, or the BSD license below:
	*
	* 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 HOLDER 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.
	*
	* Contact Information:
	* linux-drivers@emulex.com
	*
	* Emulex
	* 3333 Susan Street
	* Costa Mesa, CA 92626
	*/

	#include <net/neighbour.h>
	#include <net/netevent.h>

	#include <rdma/ib_addr.h>
	#include <rdma/ib_mad.h>
	#include <rdma/ib_cache.h>

	#include "ocrdma.h"
	#include "ocrdma_verbs.h"
	#include "ocrdma_ah.h"
	#include "ocrdma_hw.h"
	#include "ocrdma_stats.h"

	#define OCRDMA_VID_PCP_SHIFT 0xD

	static u16 ocrdma_hdr_type_to_proto_num(int devid, u8 hdr_type)
	{
	switch (hdr_type) {
	case OCRDMA_L3_TYPE_IB_GRH:
	return (u16)0x8915;
	case OCRDMA_L3_TYPE_IPV4:
	return (u16)0x0800;
	case OCRDMA_L3_TYPE_IPV6:
	return (u16)0x86dd;
	default:
	pr_err("ocrdma%d: Invalid network header\n", devid);
	return 0;
	}
	}

	static inline int set_av_attr(struct ocrdma_dev dev, struct ocrdma_ah ah,
	struct ib_ah_attr attr, union ib_gid sgid,
	int pdid, bool *isvlan, u16 vlan_tag)
	{
	int status;
	struct ocrdma_eth_vlan eth;
	struct ocrdma_grh grh;
	int eth_sz;
	u16 proto_num = 0;
	u8 nxthdr = 0x11;
	struct iphdr ipv4;
	union {
	struct sockaddr _sockaddr;
	struct sockaddr_in _sockaddr_in;
	struct sockaddr_in6 _sockaddr_in6;
	} sgid_addr, dgid_addr;

	memset(&eth, 0, sizeof(eth));
	memset(&grh, 0, sizeof(grh));

	/* Protocol Number */
	proto_num = ocrdma_hdr_type_to_proto_num(dev->id, ah->hdr_type);
	if (!proto_num)
	return -EINVAL;
	nxthdr = (proto_num == 0x8915) ? 0x1b : 0x11;
	/* VLAN */
	if (!vlan_tag \|\| (vlan_tag > 0xFFF))
	vlan_tag = dev->pvid;
	if (vlan_tag \|\| dev->pfc_state) {
	if (!vlan_tag) {
	pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
	dev->id);
	pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
	dev->id);
	}
	eth.eth_type = cpu_to_be16(0x8100);
	eth.roce_eth_type = cpu_to_be16(proto_num);
	vlan_tag \|= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
	eth.vlan_tag = cpu_to_be16(vlan_tag);
	eth_sz = sizeof(struct ocrdma_eth_vlan);
	*isvlan = true;
	} else {
	eth.eth_type = cpu_to_be16(proto_num);
	eth_sz = sizeof(struct ocrdma_eth_basic);
	}
	/* MAC */
	memcpy(&eth.smac[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
	status = ocrdma_resolve_dmac(dev, attr, &eth.dmac[0]);
	if (status)
	return status;
	ah->sgid_index = attr->grh.sgid_index;
	/* Eth HDR */
	memcpy(&ah->av->eth_hdr, &eth, eth_sz);
	if (ah->hdr_type == RDMA_NETWORK_IPV4) {
	((__be16 )&ipv4) = htons((4 << 12) \| (5 << 8) \|
	attr->grh.traffic_class);
	ipv4.id = cpu_to_be16(pdid);
	ipv4.frag_off = htons(IP_DF);
	ipv4.tot_len = htons(0);
	ipv4.ttl = attr->grh.hop_limit;
	ipv4.protocol = nxthdr;
	rdma_gid2ip(&sgid_addr._sockaddr, sgid);
	ipv4.saddr = sgid_addr._sockaddr_in.sin_addr.s_addr;
	rdma_gid2ip(&dgid_addr._sockaddr, &attr->grh.dgid);
	ipv4.daddr = dgid_addr._sockaddr_in.sin_addr.s_addr;
	memcpy((u8 *)ah->av + eth_sz, &ipv4, sizeof(struct iphdr));
	} else {
	memcpy(&grh.sgid[0], sgid->raw, sizeof(union ib_gid));
	grh.tclass_flow = cpu_to_be32((6 << 28) \|
	(attr->grh.traffic_class << 24) \|
	attr->grh.flow_label);
	memcpy(&grh.dgid[0], attr->grh.dgid.raw,
	sizeof(attr->grh.dgid.raw));
	grh.pdid_hoplimit = cpu_to_be32((pdid << 16) \|
	(nxthdr << 8) \|
	attr->grh.hop_limit);
	memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
	}
	if (*isvlan)
	ah->av->valid \|= OCRDMA_AV_VLAN_VALID;
	ah->av->valid = cpu_to_le32(ah->av->valid);
	return status;
	}

	struct ib_ah ocrdma_create_ah(struct ib_pd ibpd, struct ib_ah_attr *attr)
	{
	u32 *ahid_addr;
	int status;
	struct ocrdma_ah *ah;
	bool isvlan = false;
	u16 vlan_tag = 0xffff;
	struct ib_gid_attr sgid_attr;
	struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
	struct ocrdma_dev *dev = get_ocrdma_dev(ibpd->device);
	union ib_gid sgid;

	if (!(attr->ah_flags & IB_AH_GRH))
	return ERR_PTR(-EINVAL);

	if (atomic_cmpxchg(&dev->update_sl, 1, 0))
	ocrdma_init_service_level(dev);

	ah = kzalloc(sizeof(*ah), GFP_ATOMIC);
	if (!ah)
	return ERR_PTR(-ENOMEM);

	status = ocrdma_alloc_av(dev, ah);
	if (status)
	goto av_err;

	status = ib_get_cached_gid(&dev->ibdev, 1, attr->grh.sgid_index, &sgid,
	&sgid_attr);
	if (status) {
	pr_err("%s(): Failed to query sgid, status = %d\n",
	__func__, status);
	goto av_conf_err;
	}
	if (sgid_attr.ndev) {
	if (is_vlan_dev(sgid_attr.ndev))
	vlan_tag = vlan_dev_vlan_id(sgid_attr.ndev);
	dev_put(sgid_attr.ndev);
	}
	/* Get network header type for this GID */
	ah->hdr_type = ib_gid_to_network_type(sgid_attr.gid_type, &sgid);

	if ((pd->uctx) &&
	(!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) &&
	(!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
	status = rdma_addr_find_l2_eth_by_grh(&sgid, &attr->grh.dgid,
	attr->dmac, &vlan_tag,
	&sgid_attr.ndev->ifindex,
	NULL);
	if (status) {
	pr_err("%s(): Failed to resolve dmac from gid."
	"status = %d\n", __func__, status);
	goto av_conf_err;
	}
	}

	status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan, vlan_tag);
	if (status)
	goto av_conf_err;

	/* if pd is for the user process, pass the ah_id to user space */
	if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
	ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
	*ahid_addr = 0;
	*ahid_addr \|= ah->id & OCRDMA_AH_ID_MASK;
	if (ocrdma_is_udp_encap_supported(dev)) {
	*ahid_addr \|= ((u32)ah->hdr_type &
	OCRDMA_AH_L3_TYPE_MASK) <<
	OCRDMA_AH_L3_TYPE_SHIFT;
	}
	if (isvlan)
	*ahid_addr \|= (OCRDMA_AH_VLAN_VALID_MASK <<
	OCRDMA_AH_VLAN_VALID_SHIFT);
	}

	return &ah->ibah;

	av_conf_err:
	ocrdma_free_av(dev, ah);
	av_err:
	kfree(ah);
	return ERR_PTR(status);
	}

	int ocrdma_destroy_ah(struct ib_ah *ibah)
	{
	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
	struct ocrdma_dev *dev = get_ocrdma_dev(ibah->device);

	ocrdma_free_av(dev, ah);
	kfree(ah);
	return 0;
	}

	int ocrdma_query_ah(struct ib_ah ibah, struct ib_ah_attr attr)
	{
	struct ocrdma_ah *ah = get_ocrdma_ah(ibah);
	struct ocrdma_av *av = ah->av;
	struct ocrdma_grh *grh;
	attr->ah_flags \|= IB_AH_GRH;
	if (ah->av->valid & OCRDMA_AV_VALID) {
	grh = (struct ocrdma_grh )((u8 )ah->av +
	sizeof(struct ocrdma_eth_vlan));
	attr->sl = be16_to_cpu(av->eth_hdr.vlan_tag) >> 13;
	} else {
	grh = (struct ocrdma_grh )((u8 )ah->av +
	sizeof(struct ocrdma_eth_basic));
	attr->sl = 0;
	}
	memcpy(&attr->grh.dgid.raw[0], &grh->dgid[0], sizeof(grh->dgid));
	attr->grh.sgid_index = ah->sgid_index;
	attr->grh.hop_limit = be32_to_cpu(grh->pdid_hoplimit) & 0xff;
	attr->grh.traffic_class = be32_to_cpu(grh->tclass_flow) >> 24;
	attr->grh.flow_label = be32_to_cpu(grh->tclass_flow) & 0x00ffffffff;
	return 0;
	}

	int ocrdma_modify_ah(struct ib_ah ibah, struct ib_ah_attr attr)
	{
	/* modify_ah is unsupported */
	return -ENOSYS;
	}

	int ocrdma_process_mad(struct ib_device *ibdev,
	int process_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 status;
	struct ocrdma_dev *dev;
	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;

	switch (in_mad->mad_hdr.mgmt_class) {
	case IB_MGMT_CLASS_PERF_MGMT:
	dev = get_ocrdma_dev(ibdev);
	if (!ocrdma_pma_counters(dev, out_mad))
	status = IB_MAD_RESULT_SUCCESS \| IB_MAD_RESULT_REPLY;
	else
	status = IB_MAD_RESULT_SUCCESS;
	break;
	default:
	status = IB_MAD_RESULT_SUCCESS;
	break;
	}
	return status;
	}