path: root/drivers/infiniband/hw/hfi1/mad.c

/*
 * Copyright(c) 2015-2018 Intel Corporation.
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * 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.
 *  - Neither the name of Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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 <linux/net.h>
#include <rdma/opa_addr.h>
#define OPA_NUM_PKEY_BLOCKS_PER_SMP (OPA_SMP_DR_DATA_SIZE \
			/ (OPA_PARTITION_TABLE_BLK_SIZE * sizeof(u16)))

#include "hfi.h"
#include "mad.h"
#include "trace.h"
#include "qp.h"
#include "vnic.h"

/* the reset value from the FM is supposed to be 0xffff, handle both */
#define OPA_LINK_WIDTH_RESET_OLD 0x0fff
#define OPA_LINK_WIDTH_RESET 0xffff

struct trap_node {
	struct list_head list;
	struct opa_mad_notice_attr data;
	__be64 tid;
	int len;
	u32 retry;
	u8 in_use;
	u8 repress;
};

static int smp_length_check(u32 data_size, u32 request_len)
{
	if (unlikely(request_len < data_size))
		return -EINVAL;

	return 0;
}

static int reply(struct ib_mad_hdr *smp)
{
	/*
	 * The verbs framework will handle the directed/LID route
	 * packet changes.
	 */
	smp->method = IB_MGMT_METHOD_GET_RESP;
	if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
		smp->status |= IB_SMP_DIRECTION;
	return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
}

static inline void clear_opa_smp_data(struct opa_smp *smp)
{
	void *data = opa_get_smp_data(smp);
	size_t size = opa_get_smp_data_size(smp);

	memset(data, 0, size);
}

static u16 hfi1_lookup_pkey_value(struct hfi1_ibport *ibp, int pkey_idx)
{
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);

	if (pkey_idx < ARRAY_SIZE(ppd->pkeys))
		return ppd->pkeys[pkey_idx];

	return 0;
}

void hfi1_event_pkey_change(struct hfi1_devdata *dd, u32 port)
{
	struct ib_event event;

	event.event = IB_EVENT_PKEY_CHANGE;
	event.device = &dd->verbs_dev.rdi.ibdev;
	event.element.port_num = port;
	ib_dispatch_event(&event);
}

/*
 * If the port is down, clean up all pending traps.  We need to be careful
 * with the given trap, because it may be queued.
 */
static void cleanup_traps(struct hfi1_ibport *ibp, struct trap_node *trap)
{
	struct trap_node *node, *q;
	unsigned long flags;
	struct list_head trap_list;
	int i;

	for (i = 0; i < RVT_MAX_TRAP_LISTS; i++) {
		spin_lock_irqsave(&ibp->rvp.lock, flags);
		list_replace_init(&ibp->rvp.trap_lists[i].list, &trap_list);
		ibp->rvp.trap_lists[i].list_len = 0;
		spin_unlock_irqrestore(&ibp->rvp.lock, flags);

		/*
		 * Remove all items from the list, freeing all the non-given
		 * traps.
		 */
		list_for_each_entry_safe(node, q, &trap_list, list) {
			list_del(&node->list);
			if (node != trap)
				kfree(node);
		}
	}

	/*
	 * If this wasn't on one of the lists it would not be freed.  If it
	 * was on the list, it is now safe to free.
	 */
	kfree(trap);
}

static struct trap_node *check_and_add_trap(struct hfi1_ibport *ibp,
					    struct trap_node *trap)
{
	struct trap_node *node;
	struct trap_list *trap_list;
	unsigned long flags;
	unsigned long timeout;
	int found = 0;
	unsigned int queue_id;
	static int trap_count;

	queue_id = trap->data.generic_type & 0x0F;
	if (queue_id >= RVT_MAX_TRAP_LISTS) {
		trap_count++;
		pr_err_ratelimited("hfi1: Invalid trap 0x%0x dropped. Total dropped: %d\n",
				   trap->data.generic_type, trap_count);
		kfree(trap);
		return NULL;
	}

	/*
	 * Since the retry (handle timeout) does not remove a trap request
	 * from the list, all we have to do is compare the node.
	 */
	spin_lock_irqsave(&ibp->rvp.lock, flags);
	trap_list = &ibp->rvp.trap_lists[queue_id];

	list_for_each_entry(node, &trap_list->list, list) {
		if (node == trap) {
			node->retry++;
			found = 1;
			break;
		}
	}

	/* If it is not on the list, add it, limited to RVT-MAX_TRAP_LEN. */
	if (!found) {
		if (trap_list->list_len < RVT_MAX_TRAP_LEN) {
			trap_list->list_len++;
			list_add_tail(&trap->list, &trap_list->list);
		} else {
			pr_warn_ratelimited("hfi1: Maximum trap limit reached for 0x%0x traps\n",
					    trap->data.generic_type);
			kfree(trap);
		}
	}

	/*
	 * Next check to see if there is a timer pending.  If not, set it up
	 * and get the first trap from the list.
	 */
	node = NULL;
	if (!timer_pending(&ibp->rvp.trap_timer)) {
		/*
		 * o14-2
		 * If the time out is set we have to wait until it expires
		 * before the trap can be sent.
		 * This should be > RVT_TRAP_TIMEOUT
		 */
		timeout = (RVT_TRAP_TIMEOUT *
			   (1UL << ibp->rvp.subnet_timeout)) / 1000;
		mod_timer(&ibp->rvp.trap_timer,
			  jiffies + usecs_to_jiffies(timeout));
		node = list_first_entry(&trap_list->list, struct trap_node,
					list);
		node->in_use = 1;
	}
	spin_unlock_irqrestore(&ibp->rvp.lock, flags);

	return node;
}

static void subn_handle_opa_trap_repress(struct hfi1_ibport *ibp,
					 struct opa_smp *smp)
{
	struct trap_list *trap_list;
	struct trap_node *trap;
	unsigned long flags;
	int i;

	if (smp->attr_id != IB_SMP_ATTR_NOTICE)
		return;

	spin_lock_irqsave(&ibp->rvp.lock, flags);
	for (i = 0; i < RVT_MAX_TRAP_LISTS; i++) {
		trap_list = &ibp->rvp.trap_lists[i];
		trap = list_first_entry_or_null(&trap_list->list,
						struct trap_node, list);
		if (trap && trap->tid == smp->tid) {
			if (trap->in_use) {
				trap->repress = 1;
			} else {
				trap_list->list_len--;
				list_del(&trap->list);
				kfree(trap);
			}
			break;
		}
	}
	spin_unlock_irqrestore(&ibp->rvp.lock, flags);
}

static void hfi1_update_sm_ah_attr(struct hfi1_ibport *ibp,
				   struct rdma_ah_attr *attr, u32 dlid)
{
	rdma_ah_set_dlid(attr, dlid);
	rdma_ah_set_port_num(attr, ppd_from_ibp(ibp)->port);
	if (dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) {
		struct ib_global_route *grh = rdma_ah_retrieve_grh(attr);

		rdma_ah_set_ah_flags(attr, IB_AH_GRH);
		grh->sgid_index = 0;
		grh->hop_limit = 1;
		grh->dgid.global.subnet_prefix =
			ibp->rvp.gid_prefix;
		grh->dgid.global.interface_id = OPA_MAKE_ID(dlid);
	}
}

static int hfi1_modify_qp0_ah(struct hfi1_ibport *ibp,
			      struct rvt_ah *ah, u32 dlid)
{
	struct rdma_ah_attr attr;
	struct rvt_qp *qp0;
	int ret = -EINVAL;

	memset(&attr, 0, sizeof(attr));
	attr.type = ah->ibah.type;
	hfi1_update_sm_ah_attr(ibp, &attr, dlid);
	rcu_read_lock();
	qp0 = rcu_dereference(ibp->rvp.qp[0]);
	if (qp0)
		ret = rdma_modify_ah(&ah->ibah, &attr);
	rcu_read_unlock();
	return ret;
}

static struct ib_ah *hfi1_create_qp0_ah(struct hfi1_ibport *ibp, u32 dlid)
{
	struct rdma_ah_attr attr;
	struct ib_ah *ah = ERR_PTR(-EINVAL);
	struct rvt_qp *qp0;
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	struct hfi1_devdata *dd = dd_from_ppd(ppd);
	u32 port_num = ppd->port;

	memset(&attr, 0, sizeof(attr));
	attr.type = rdma_ah_find_type(&dd->verbs_dev.rdi.ibdev, port_num);
	hfi1_update_sm_ah_attr(ibp, &attr, dlid);
	rcu_read_lock();
	qp0 = rcu_dereference(ibp->rvp.qp[0]);
	if (qp0)
		ah = rdma_create_ah(qp0->ibqp.pd, &attr, 0);
	rcu_read_unlock();
	return ah;
}

static void send_trap(struct hfi1_ibport *ibp, struct trap_node *trap)
{
	struct ib_mad_send_buf *send_buf;
	struct ib_mad_agent *agent;
	struct opa_smp *smp;
	unsigned long flags;
	int pkey_idx;
	u32 qpn = ppd_from_ibp(ibp)->sm_trap_qp;

	agent = ibp->rvp.send_agent;
	if (!agent) {
		cleanup_traps(ibp, trap);
		return;
	}

	/* o14-3.2.1 */
	if (driver_lstate(ppd_from_ibp(ibp)) != IB_PORT_ACTIVE) {
		cleanup_traps(ibp, trap);
		return;
	}

	/* Add the trap to the list if necessary and see if we can send it */
	trap = check_and_add_trap(ibp, trap);
	if (!trap)
		return;

	pkey_idx = hfi1_lookup_pkey_idx(ibp, LIM_MGMT_P_KEY);
	if (pkey_idx < 0) {
		pr_warn("%s: failed to find limited mgmt pkey, defaulting 0x%x\n",
			__func__, hfi1_get_pkey(ibp, 1));
		pkey_idx = 1;
	}

	send_buf = ib_create_send_mad(agent, qpn, pkey_idx, 0,
				      IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA,
				      GFP_ATOMIC, IB_MGMT_BASE_VERSION);
	if (IS_ERR(send_buf))
		return;

	smp = send_buf->mad;
	smp->base_version = OPA_MGMT_BASE_VERSION;
	smp->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
	smp->class_version = OPA_SM_CLASS_VERSION;
	smp->method = IB_MGMT_METHOD_TRAP;

	/* Only update the transaction ID for new traps (o13-5). */
	if (trap->tid == 0) {
		ibp->rvp.tid++;
		/* make sure that tid != 0 */
		if (ibp->rvp.tid == 0)
			ibp->rvp.tid++;
		trap->tid = cpu_to_be64(ibp->rvp.tid);
	}
	smp->tid = trap->tid;

	smp->attr_id = IB_SMP_ATTR_NOTICE;
	/* o14-1: smp->mkey = 0; */

	memcpy(smp->route.lid.data, &trap->data, trap->len);

	spin_lock_irqsave(&ibp->rvp.lock, flags);
	if (!ibp->rvp.sm_ah) {
		if (ibp->rvp.sm_lid != be16_to_cpu(IB_LID_PERMISSIVE)) {
			struct ib_ah *ah;

			ah = hfi1_create_qp0_ah(ibp, ibp->rvp.sm_lid);
			if (IS_ERR(ah)) {
				spin_unlock_irqrestore(&ibp->rvp.lock, flags);
				return;
			}
			send_buf->ah = ah;
			ibp->rvp.sm_ah = ibah_to_rvtah(ah);
		} else {
			spin_unlock_irqrestore(&ibp->rvp.lock, flags);
			return;
		}
	} else {
		send_buf->ah = &ibp->rvp.sm_ah->ibah;
	}

	/*
	 * If the trap was repressed while things were getting set up, don't
	 * bother sending it. This could happen for a retry.
	 */
	if (trap->repress) {
		list_del(&trap->list);
		spin_unlock_irqrestore(&ibp->rvp.lock, flags);
		kfree(trap);
		ib_free_send_mad(send_buf);
		return;
	}

	trap->in_use = 0;
	spin_unlock_irqrestore(&ibp->rvp.lock, flags);

	if (ib_post_send_mad(send_buf, NULL))
		ib_free_send_mad(send_buf);
}

void hfi1_handle_trap_timer(struct timer_list *t)
{
	struct hfi1_ibport *ibp = from_timer(ibp, t, rvp.trap_timer);
	struct trap_node *trap = NULL;
	unsigned long flags;
	int i;

	/* Find the trap with the highest priority */
	spin_lock_irqsave(&ibp->rvp.lock, flags);
	for (i = 0; !trap && i < RVT_MAX_TRAP_LISTS; i++) {
		trap = list_first_entry_or_null(&ibp->rvp.trap_lists[i].list,
						struct trap_node, list);
	}
	spin_unlock_irqrestore(&ibp->rvp.lock, flags);

	if (trap)
		send_trap(ibp, trap);
}

static struct trap_node *create_trap_node(u8 type, __be16 trap_num, u32 lid)
{
	struct trap_node *trap;

	trap = kzalloc(sizeof(*trap), GFP_ATOMIC);
	if (!trap)
		return NULL;

	INIT_LIST_HEAD(&trap->list);
	trap->data.generic_type = type;
	trap->data.prod_type_lsb = IB_NOTICE_PROD_CA;
	trap->data.trap_num = trap_num;
	trap->data.issuer_lid = cpu_to_be32(lid);

	return trap;
}

/*
 * Send a bad P_Key trap (ch. 14.3.8).
 */
void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
		   u32 qp1, u32 qp2, u32 lid1, u32 lid2)
{
	struct trap_node *trap;
	u32 lid = ppd_from_ibp(ibp)->lid;

	ibp->rvp.n_pkt_drops++;
	ibp->rvp.pkey_violations++;

	trap = create_trap_node(IB_NOTICE_TYPE_SECURITY, OPA_TRAP_BAD_P_KEY,
				lid);
	if (!trap)
		return;

	/* Send violation trap */
	trap->data.ntc_257_258.lid1 = cpu_to_be32(lid1);
	trap->data.ntc_257_258.lid2 = cpu_to_be32(lid2);
	trap->data.ntc_257_258.key = cpu_to_be32(key);
	trap->data.ntc_257_258.sl = sl << 3;
	trap->data.ntc_257_258.qp1 = cpu_to_be32(qp1);
	trap->data.ntc_257_258.qp2 = cpu_to_be32(qp2);

	trap->len = sizeof(trap->data);
	send_trap(ibp, trap);
}

/*
 * Send a bad M_Key trap (ch. 14.3.9).
 */
static void bad_mkey(struct hfi1_ibport *ibp, struct ib_mad_hdr *mad,
		     __be64 mkey, __be32 dr_slid, u8 return_path[], u8 hop_cnt)
{
	struct trap_node *trap;
	u32 lid = ppd_from_ibp(ibp)->lid;

	trap = create_trap_node(IB_NOTICE_TYPE_SECURITY, OPA_TRAP_BAD_M_KEY,
				lid);
	if (!trap)
		return;

	/* Send violation trap */
	trap->data.ntc_256.lid = trap->data.issuer_lid;
	trap->data.ntc_256.method = mad->method;
	trap->data.ntc_256.attr_id = mad->attr_id;
	trap->data.ntc_256.attr_mod = mad->attr_mod;
	trap->data.ntc_256.mkey = mkey;
	if (mad->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
		trap->data.ntc_256.dr_slid = dr_slid;
		trap->data.ntc_256.dr_trunc_hop = IB_NOTICE_TRAP_DR_NOTICE;
		if (hop_cnt > ARRAY_SIZE(trap->data.ntc_256.dr_rtn_path)) {
			trap->data.ntc_256.dr_trunc_hop |=
				IB_NOTICE_TRAP_DR_TRUNC;
			hop_cnt = ARRAY_SIZE(trap->data.ntc_256.dr_rtn_path);
		}
		trap->data.ntc_256.dr_trunc_hop |= hop_cnt;
		memcpy(trap->data.ntc_256.dr_rtn_path, return_path,
		       hop_cnt);
	}

	trap->len = sizeof(trap->data);

	send_trap(ibp, trap);
}

/*
 * Send a Port Capability Mask Changed trap (ch. 14.3.11).
 */
void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u32 port_num)
{
	struct trap_node *trap;
	struct hfi1_ibdev *verbs_dev = dev_from_rdi(rdi);
	struct hfi1_devdata *dd = dd_from_dev(verbs_dev);
	struct hfi1_ibport *ibp = &dd->pport[port_num - 1].ibport_data;
	u32 lid = ppd_from_ibp(ibp)->lid;

	trap = create_trap_node(IB_NOTICE_TYPE_INFO,
				OPA_TRAP_CHANGE_CAPABILITY,
				lid);
	if (!trap)
		return;

	trap->data.ntc_144.lid = trap->data.issuer_lid;
	trap->data.ntc_144.new_cap_mask = cpu_to_be32(ibp->rvp.port_cap_flags);
	trap->data.ntc_144.cap_mask3 = cpu_to_be16(ibp->rvp.port_cap3_flags);

	trap->len = sizeof(trap->data);
	send_trap(ibp, trap);
}

/*
 * Send a System Image GUID Changed trap (ch. 14.3.12).
 */
void hfi1_sys_guid_chg(struct hfi1_ibport *ibp)
{
	struct trap_node *trap;
	u32 lid = ppd_from_ibp(ibp)->lid;

	trap = create_trap_node(IB_NOTICE_TYPE_INFO, OPA_TRAP_CHANGE_SYSGUID,
				lid);
	if (!trap)
		return;

	trap->data.ntc_145.new_sys_guid = ib_hfi1_sys_image_guid;
	trap->data.ntc_145.lid = trap->data.issuer_lid;

	trap->len = sizeof(trap->data);
	send_trap(ibp, trap);
}

/*
 * Send a Node Description Changed trap (ch. 14.3.13).
 */
void hfi1_node_desc_chg(struct hfi1_ibport *ibp)
{
	struct trap_node *trap;
	u32 lid = ppd_from_ibp(ibp)->lid;

	trap = create_trap_node(IB_NOTICE_TYPE_INFO,
				OPA_TRAP_CHANGE_CAPABILITY,
				lid);
	if (!trap)
		return;

	trap->data.ntc_144.lid = trap->data.issuer_lid;
	trap->data.ntc_144.change_flags =
		cpu_to_be16(OPA_NOTICE_TRAP_NODE_DESC_CHG);

	trap->len = sizeof(trap->data);
	send_trap(ibp, trap);
}

static int __subn_get_opa_nodedesc(struct opa_smp *smp, u32 am,
				   u8 *data, struct ib_device *ibdev,
				   u32 port, u32 *resp_len, u32 max_len)
{
	struct opa_node_description *nd;

	if (am || smp_length_check(sizeof(*nd), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	nd = (struct opa_node_description *)data;

	memcpy(nd->data, ibdev->node_desc, sizeof(nd->data));

	if (resp_len)
		*resp_len += sizeof(*nd);

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_get_opa_nodeinfo(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct opa_node_info *ni;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	u32 pidx = port - 1; /* IB number port from 1, hw from 0 */

	ni = (struct opa_node_info *)data;

	/* GUID 0 is illegal */
	if (am || pidx >= dd->num_pports || ibdev->node_guid == 0 ||
	    smp_length_check(sizeof(*ni), max_len) ||
	    get_sguid(to_iport(ibdev, port), HFI1_PORT_GUID_INDEX) == 0) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	ni->port_guid = get_sguid(to_iport(ibdev, port), HFI1_PORT_GUID_INDEX);
	ni->base_version = OPA_MGMT_BASE_VERSION;
	ni->class_version = OPA_SM_CLASS_VERSION;
	ni->node_type = 1;     /* channel adapter */
	ni->num_ports = ibdev->phys_port_cnt;
	/* This is already in network order */
	ni->system_image_guid = ib_hfi1_sys_image_guid;
	ni->node_guid = ibdev->node_guid;
	ni->partition_cap = cpu_to_be16(hfi1_get_npkeys(dd));
	ni->device_id = cpu_to_be16(dd->pcidev->device);
	ni->revision = cpu_to_be32(dd->minrev);
	ni->local_port_num = port;
	ni->vendor_id[0] = dd->oui1;
	ni->vendor_id[1] = dd->oui2;
	ni->vendor_id[2] = dd->oui3;

	if (resp_len)
		*resp_len += sizeof(*ni);

	return reply((struct ib_mad_hdr *)smp);
}

static int subn_get_nodeinfo(struct ib_smp *smp, struct ib_device *ibdev,
			     u32 port)
{
	struct ib_node_info *nip = (struct ib_node_info *)&smp->data;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	u32 pidx = port - 1; /* IB number port from 1, hw from 0 */

	/* GUID 0 is illegal */
	if (smp->attr_mod || pidx >= dd->num_pports ||
	    ibdev->node_guid == 0 ||
	    get_sguid(to_iport(ibdev, port), HFI1_PORT_GUID_INDEX) == 0) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	nip->port_guid = get_sguid(to_iport(ibdev, port), HFI1_PORT_GUID_INDEX);
	nip->base_version = OPA_MGMT_BASE_VERSION;
	nip->class_version = OPA_SM_CLASS_VERSION;
	nip->node_type = 1;     /* channel adapter */
	nip->num_ports = ibdev->phys_port_cnt;
	/* This is already in network order */
	nip->sys_guid = ib_hfi1_sys_image_guid;
	nip->node_guid = ibdev->node_guid;
	nip->partition_cap = cpu_to_be16(hfi1_get_npkeys(dd));
	nip->device_id = cpu_to_be16(dd->pcidev->device);
	nip->revision = cpu_to_be32(dd->minrev);
	nip->local_port_num = port;
	nip->vendor_id[0] = dd->oui1;
	nip->vendor_id[1] = dd->oui2;
	nip->vendor_id[2] = dd->oui3;

	return reply((struct ib_mad_hdr *)smp);
}

static void set_link_width_enabled(struct hfi1_pportdata *ppd, u32 w)
{
	(void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LWID_ENB, w);
}

static void set_link_width_downgrade_enabled(struct hfi1_pportdata *ppd, u32 w)
{
	(void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LWID_DG_ENB, w);
}

static void set_link_speed_enabled(struct hfi1_pportdata *ppd, u32 s)
{
	(void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_SPD_ENB, s);
}

static int check_mkey(struct hfi1_ibport *ibp, struct ib_mad_hdr *mad,
		      int mad_flags, __be64 mkey, __be32 dr_slid,
		      u8 return_path[], u8 hop_cnt)
{
	int valid_mkey = 0;
	int ret = 0;

	/* Is the mkey in the process of expiring? */
	if (ibp->rvp.mkey_lease_timeout &&
	    time_after_eq(jiffies, ibp->rvp.mkey_lease_timeout)) {
		/* Clear timeout and mkey protection field. */
		ibp->rvp.mkey_lease_timeout = 0;
		ibp->rvp.mkeyprot = 0;
	}

	if ((mad_flags & IB_MAD_IGNORE_MKEY) ||  ibp->rvp.mkey == 0 ||
	    ibp->rvp.mkey == mkey)
		valid_mkey = 1;

	/* Unset lease timeout on any valid Get/Set/TrapRepress */
	if (valid_mkey && ibp->rvp.mkey_lease_timeout &&
	    (mad->method == IB_MGMT_METHOD_GET ||
	     mad->method == IB_MGMT_METHOD_SET ||
	     mad->method == IB_MGMT_METHOD_TRAP_REPRESS))
		ibp->rvp.mkey_lease_timeout = 0;

	if (!valid_mkey) {
		switch (mad->method) {
		case IB_MGMT_METHOD_GET:
			/* Bad mkey not a violation below level 2 */
			if (ibp->rvp.mkeyprot < 2)
				break;
			fallthrough;
		case IB_MGMT_METHOD_SET:
		case IB_MGMT_METHOD_TRAP_REPRESS:
			if (ibp->rvp.mkey_violations != 0xFFFF)
				++ibp->rvp.mkey_violations;
			if (!ibp->rvp.mkey_lease_timeout &&
			    ibp->rvp.mkey_lease_period)
				ibp->rvp.mkey_lease_timeout = jiffies +
					ibp->rvp.mkey_lease_period * HZ;
			/* Generate a trap notice. */
			bad_mkey(ibp, mad, mkey, dr_slid, return_path,
				 hop_cnt);
			ret = 1;
		}
	}

	return ret;
}

/*
 * The SMA caches reads from LCB registers in case the LCB is unavailable.
 * (The LCB is unavailable in certain link states, for example.)
 */
struct lcb_datum {
	u32 off;
	u64 val;
};

static struct lcb_datum lcb_cache[] = {
	{ DC_LCB_STS_ROUND_TRIP_LTP_CNT, 0 },
};

static int write_lcb_cache(u32 off, u64 val)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(lcb_cache); i++) {
		if (lcb_cache[i].off == off) {
			lcb_cache[i].val = val;
			return 0;
		}
	}

	pr_warn("%s bad offset 0x%x\n", __func__, off);
	return -1;
}

static int read_lcb_cache(u32 off, u64 *val)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(lcb_cache); i++) {
		if (lcb_cache[i].off == off) {
			*val = lcb_cache[i].val;
			return 0;
		}
	}

	pr_warn("%s bad offset 0x%x\n", __func__, off);
	return -1;
}

void read_ltp_rtt(struct hfi1_devdata *dd)
{
	u64 reg;

	if (read_lcb_csr(dd, DC_LCB_STS_ROUND_TRIP_LTP_CNT, &reg))
		dd_dev_err(dd, "%s: unable to read LTP RTT\n", __func__);
	else
		write_lcb_cache(DC_LCB_STS_ROUND_TRIP_LTP_CNT, reg);
}

static int __subn_get_opa_portinfo(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	int i;
	struct hfi1_devdata *dd;
	struct hfi1_pportdata *ppd;
	struct hfi1_ibport *ibp;
	struct opa_port_info *pi = (struct opa_port_info *)data;
	u8 mtu;
	u8 credit_rate;
	u8 is_beaconing_active;
	u32 state;
	u32 num_ports = OPA_AM_NPORT(am);
	u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
	u32 buffer_units;
	u64 tmp = 0;

	if (num_ports != 1 || smp_length_check(sizeof(*pi), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	dd = dd_from_ibdev(ibdev);
	/* IB numbers ports from 1, hw from 0 */
	ppd = dd->pport + (port - 1);
	ibp = &ppd->ibport_data;

	if (ppd->vls_supported / 2 > ARRAY_SIZE(pi->neigh_mtu.pvlx_to_mtu) ||
	    ppd->vls_supported > ARRAY_SIZE(dd->vld)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	pi->lid = cpu_to_be32(ppd->lid);

	/* Only return the mkey if the protection field allows it. */
	if (!(smp->method == IB_MGMT_METHOD_GET &&
	      ibp->rvp.mkey != smp->mkey &&
	      ibp->rvp.mkeyprot == 1))
		pi->mkey = ibp->rvp.mkey;

	pi->subnet_prefix = ibp->rvp.gid_prefix;
	pi->sm_lid = cpu_to_be32(ibp->rvp.sm_lid);
	pi->ib_cap_mask = cpu_to_be32(ibp->rvp.port_cap_flags);
	pi->mkey_lease_period = cpu_to_be16(ibp->rvp.mkey_lease_period);
	pi->sm_trap_qp = cpu_to_be32(ppd->sm_trap_qp);
	pi->sa_qp = cpu_to_be32(ppd->sa_qp);

	pi->link_width.enabled = cpu_to_be16(ppd->link_width_enabled);
	pi->link_width.supported = cpu_to_be16(ppd->link_width_supported);
	pi->link_width.active = cpu_to_be16(ppd->link_width_active);

	pi->link_width_downgrade.supported =
			cpu_to_be16(ppd->link_width_downgrade_supported);
	pi->link_width_downgrade.enabled =
			cpu_to_be16(ppd->link_width_downgrade_enabled);
	pi->link_width_downgrade.tx_active =
			cpu_to_be16(ppd->link_width_downgrade_tx_active);
	pi->link_width_downgrade.rx_active =
			cpu_to_be16(ppd->link_width_downgrade_rx_active);

	pi->link_speed.supported = cpu_to_be16(ppd->link_speed_supported);
	pi->link_speed.active = cpu_to_be16(ppd->link_speed_active);
	pi->link_speed.enabled = cpu_to_be16(ppd->link_speed_enabled);

	state = driver_lstate(ppd);

	if (start_of_sm_config && (state == IB_PORT_INIT))
		ppd->is_sm_config_started = 1;

	pi->port_phys_conf = (ppd->port_type & 0xf);

	pi->port_states.ledenable_offlinereason = ppd->neighbor_normal << 4;
	pi->port_states.ledenable_offlinereason |=
		ppd->is_sm_config_started << 5;
	/*
	 * This pairs with the memory barrier in hfi1_start_led_override to
	 * ensure that we read the correct state of LED beaconing represented
	 * by led_override_timer_active
	 */
	smp_rmb();
	is_beaconing_active = !!atomic_read(&ppd->led_override_timer_active);
	pi->port_states.ledenable_offlinereason |= is_beaconing_active << 6;
	pi->port_states.ledenable_offlinereason |=
		ppd->offline_disabled_reason;

	pi->port_states.portphysstate_portstate =
		(driver_pstate(ppd) << 4) | state;

	pi->mkeyprotect_lmc = (ibp->rvp.mkeyprot << 6) | ppd->lmc;

	memset(pi->neigh_mtu.pvlx_to_mtu, 0, sizeof(pi->neigh_mtu.pvlx_to_mtu));
	for (i = 0; i < ppd->vls_supported; i++) {
		mtu = mtu_to_enum(dd->vld[i].mtu, HFI1_DEFAULT_ACTIVE_MTU);
		if ((i % 2) == 0)
			pi->neigh_mtu.pvlx_to_mtu[i / 2] |= (mtu << 4);
		else
			pi->neigh_mtu.pvlx_to_mtu[i / 2] |= mtu;
	}
	/* don't forget VL 15 */
	mtu = mtu_to_enum(dd->vld[15].mtu, 2048);
	pi->neigh_mtu.pvlx_to_mtu[15 / 2] |= mtu;
	pi->smsl = ibp->rvp.sm_sl & OPA_PI_MASK_SMSL;
	pi->operational_vls = hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_OP_VLS);
	pi->partenforce_filterraw |=
		(ppd->linkinit_reason & OPA_PI_MASK_LINKINIT_REASON);
	if (ppd->part_enforce & HFI1_PART_ENFORCE_IN)
		pi->partenforce_filterraw |= OPA_PI_MASK_PARTITION_ENFORCE_IN;
	if (ppd->part_enforce & HFI1_PART_ENFORCE_OUT)
		pi->partenforce_filterraw |= OPA_PI_MASK_PARTITION_ENFORCE_OUT;
	pi->mkey_violations = cpu_to_be16(ibp->rvp.mkey_violations);
	/* P_KeyViolations are counted by hardware. */
	pi->pkey_violations = cpu_to_be16(ibp->rvp.pkey_violations);
	pi->qkey_violations = cpu_to_be16(ibp->rvp.qkey_violations);

	pi->vl.cap = ppd->vls_supported;
	pi->vl.high_limit = cpu_to_be16(ibp->rvp.vl_high_limit);
	pi->vl.arb_high_cap = (u8)hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_VL_HIGH_CAP);
	pi->vl.arb_low_cap = (u8)hfi1_get_ib_cfg(ppd, HFI1_IB_CFG_VL_LOW_CAP);

	pi->clientrereg_subnettimeout = ibp->rvp.subnet_timeout;

	pi->port_link_mode  = cpu_to_be16(OPA_PORT_LINK_MODE_OPA << 10 |
					  OPA_PORT_LINK_MODE_OPA << 5 |
					  OPA_PORT_LINK_MODE_OPA);

	pi->port_ltp_crc_mode = cpu_to_be16(ppd->port_ltp_crc_mode);

	pi->port_mode = cpu_to_be16(
				ppd->is_active_optimize_enabled ?
					OPA_PI_MASK_PORT_ACTIVE_OPTOMIZE : 0);

	pi->port_packet_format.supported =
		cpu_to_be16(OPA_PORT_PACKET_FORMAT_9B |
			    OPA_PORT_PACKET_FORMAT_16B);
	pi->port_packet_format.enabled =
		cpu_to_be16(OPA_PORT_PACKET_FORMAT_9B |
			    OPA_PORT_PACKET_FORMAT_16B);

	/* flit_control.interleave is (OPA V1, version .76):
	 * bits		use
	 * ----		---
	 * 2		res
	 * 2		DistanceSupported
	 * 2		DistanceEnabled
	 * 5		MaxNextLevelTxEnabled
	 * 5		MaxNestLevelRxSupported
	 *
	 * HFI supports only "distance mode 1" (see OPA V1, version .76,
	 * section 9.6.2), so set DistanceSupported, DistanceEnabled
	 * to 0x1.
	 */
	pi->flit_control.interleave = cpu_to_be16(0x1400);

	pi->link_down_reason = ppd->local_link_down_reason.sma;
	pi->neigh_link_down_reason = ppd->neigh_link_down_reason.sma;
	pi->port_error_action = cpu_to_be32(ppd->port_error_action);
	pi->mtucap = mtu_to_enum(hfi1_max_mtu, IB_MTU_4096);

	/* 32.768 usec. response time (guessing) */
	pi->resptimevalue = 3;

	pi->local_port_num = port;

	/* buffer info for FM */
	pi->overall_buffer_space = cpu_to_be16(dd->link_credits);

	pi->neigh_node_guid = cpu_to_be64(ppd->neighbor_guid);
	pi->neigh_port_num = ppd->neighbor_port_number;
	pi->port_neigh_mode =
		(ppd->neighbor_type & OPA_PI_MASK_NEIGH_NODE_TYPE) |
		(ppd->mgmt_allowed ? OPA_PI_MASK_NEIGH_MGMT_ALLOWED : 0) |
		(ppd->neighbor_fm_security ?
			OPA_PI_MASK_NEIGH_FW_AUTH_BYPASS : 0);

	/* HFIs shall always return VL15 credits to their
	 * neighbor in a timely manner, without any credit return pacing.
	 */
	credit_rate = 0;
	buffer_units  = (dd->vau) & OPA_PI_MASK_BUF_UNIT_BUF_ALLOC;
	buffer_units |= (dd->vcu << 3) & OPA_PI_MASK_BUF_UNIT_CREDIT_ACK;
	buffer_units |= (credit_rate << 6) &
				OPA_PI_MASK_BUF_UNIT_VL15_CREDIT_RATE;
	buffer_units |= (dd->vl15_init << 11) & OPA_PI_MASK_BUF_UNIT_VL15_INIT;
	pi->buffer_units = cpu_to_be32(buffer_units);

	pi->opa_cap_mask = cpu_to_be16(ibp->rvp.port_cap3_flags);
	pi->collectivemask_multicastmask = ((OPA_COLLECTIVE_NR & 0x7)
					    << 3 | (OPA_MCAST_NR & 0x7));

	/* HFI supports a replay buffer 128 LTPs in size */
	pi->replay_depth.buffer = 0x80;
	/* read the cached value of DC_LCB_STS_ROUND_TRIP_LTP_CNT */
	read_lcb_cache(DC_LCB_STS_ROUND_TRIP_LTP_CNT, &tmp);

	/*
	 * this counter is 16 bits wide, but the replay_depth.wire
	 * variable is only 8 bits
	 */
	if (tmp > 0xff)
		tmp = 0xff;
	pi->replay_depth.wire = tmp;

	if (resp_len)
		*resp_len += sizeof(struct opa_port_info);

	return reply((struct ib_mad_hdr *)smp);
}

/**
 * get_pkeys - return the PKEY table
 * @dd: the hfi1_ib device
 * @port: the IB port number
 * @pkeys: the pkey table is placed here
 */
static int get_pkeys(struct hfi1_devdata *dd, u32 port, u16 *pkeys)
{
	struct hfi1_pportdata *ppd = dd->pport + port - 1;

	memcpy(pkeys, ppd->pkeys, sizeof(ppd->pkeys));

	return 0;
}

static int __subn_get_opa_pkeytable(struct opa_smp *smp, u32 am, u8 *data,
				    struct ib_device *ibdev, u32 port,
				    u32 *resp_len, u32 max_len)
{
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	u32 n_blocks_req = OPA_AM_NBLK(am);
	u32 start_block = am & 0x7ff;
	__be16 *p;
	u16 *q;
	int i;
	u16 n_blocks_avail;
	unsigned npkeys = hfi1_get_npkeys(dd);
	size_t size;

	if (n_blocks_req == 0) {
		pr_warn("OPA Get PKey AM Invalid : P = %d; B = 0x%x; N = 0x%x\n",
			port, start_block, n_blocks_req);
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	n_blocks_avail = (u16)(npkeys / OPA_PARTITION_TABLE_BLK_SIZE) + 1;

	size = (n_blocks_req * OPA_PARTITION_TABLE_BLK_SIZE) * sizeof(u16);

	if (smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	if (start_block + n_blocks_req > n_blocks_avail ||
	    n_blocks_req > OPA_NUM_PKEY_BLOCKS_PER_SMP) {
		pr_warn("OPA Get PKey AM Invalid : s 0x%x; req 0x%x; "
			"avail 0x%x; blk/smp 0x%lx\n",
			start_block, n_blocks_req, n_blocks_avail,
			OPA_NUM_PKEY_BLOCKS_PER_SMP);
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	p = (__be16 *)data;
	q = (u16 *)data;
	/* get the real pkeys if we are requesting the first block */
	if (start_block == 0) {
		get_pkeys(dd, port, q);
		for (i = 0; i < npkeys; i++)
			p[i] = cpu_to_be16(q[i]);
		if (resp_len)
			*resp_len += size;
	} else {
		smp->status |= IB_SMP_INVALID_FIELD;
	}
	return reply((struct ib_mad_hdr *)smp);
}

enum {
	HFI_TRANSITION_DISALLOWED,
	HFI_TRANSITION_IGNORED,
	HFI_TRANSITION_ALLOWED,
	HFI_TRANSITION_UNDEFINED,
};

/*
 * Use shortened names to improve readability of
 * {logical,physical}_state_transitions
 */
enum {
	__D = HFI_TRANSITION_DISALLOWED,
	__I = HFI_TRANSITION_IGNORED,
	__A = HFI_TRANSITION_ALLOWED,
	__U = HFI_TRANSITION_UNDEFINED,
};

/*
 * IB_PORTPHYSSTATE_POLLING (2) through OPA_PORTPHYSSTATE_MAX (11) are
 * represented in physical_state_transitions.
 */
#define __N_PHYSTATES (OPA_PORTPHYSSTATE_MAX - IB_PORTPHYSSTATE_POLLING + 1)

/*
 * Within physical_state_transitions, rows represent "old" states,
 * columns "new" states, and physical_state_transitions.allowed[old][new]
 * indicates if the transition from old state to new state is legal (see
 * OPAg1v1, Table 6-4).
 */
static const struct {
	u8 allowed[__N_PHYSTATES][__N_PHYSTATES];
} physical_state_transitions = {
	{
		/* 2    3    4    5    6    7    8    9   10   11 */
	/* 2 */	{ __A, __A, __D, __D, __D, __D, __D, __D, __D, __D },
	/* 3 */	{ __A, __I, __D, __D, __D, __D, __D, __D, __D, __A },
	/* 4 */	{ __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
	/* 5 */	{ __A, __A, __D, __I, __D, __D, __D, __D, __D, __D },
	/* 6 */	{ __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
	/* 7 */	{ __D, __A, __D, __D, __D, __I, __D, __D, __D, __D },
	/* 8 */	{ __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
	/* 9 */	{ __I, __A, __D, __D, __D, __D, __D, __I, __D, __D },
	/*10 */	{ __U, __U, __U, __U, __U, __U, __U, __U, __U, __U },
	/*11 */	{ __D, __A, __D, __D, __D, __D, __D, __D, __D, __I },
	}
};

/*
 * IB_PORT_DOWN (1) through IB_PORT_ACTIVE_DEFER (5) are represented
 * logical_state_transitions
 */

#define __N_LOGICAL_STATES (IB_PORT_ACTIVE_DEFER - IB_PORT_DOWN + 1)

/*
 * Within logical_state_transitions rows represent "old" states,
 * columns "new" states, and logical_state_transitions.allowed[old][new]
 * indicates if the transition from old state to new state is legal (see
 * OPAg1v1, Table 9-12).
 */
static const struct {
	u8 allowed[__N_LOGICAL_STATES][__N_LOGICAL_STATES];
} logical_state_transitions = {
	{
		/* 1    2    3    4    5 */
	/* 1 */	{ __I, __D, __D, __D, __U},
	/* 2 */	{ __D, __I, __A, __D, __U},
	/* 3 */	{ __D, __D, __I, __A, __U},
	/* 4 */	{ __D, __D, __I, __I, __U},
	/* 5 */	{ __U, __U, __U, __U, __U},
	}
};

static int logical_transition_allowed(int old, int new)
{
	if (old < IB_PORT_NOP || old > IB_PORT_ACTIVE_DEFER ||
	    new < IB_PORT_NOP || new > IB_PORT_ACTIVE_DEFER) {
		pr_warn("invalid logical state(s) (old %d new %d)\n",
			old, new);
		return HFI_TRANSITION_UNDEFINED;
	}

	if (new == IB_PORT_NOP)
		return HFI_TRANSITION_ALLOWED; /* always allowed */

	/* adjust states for indexing into logical_state_transitions */
	old -= IB_PORT_DOWN;
	new -= IB_PORT_DOWN;

	if (old < 0 || new < 0)
		return HFI_TRANSITION_UNDEFINED;
	return logical_state_transitions.allowed[old][new];
}

static int physical_transition_allowed(int old, int new)
{
	if (old < IB_PORTPHYSSTATE_NOP || old > OPA_PORTPHYSSTATE_MAX ||
	    new < IB_PORTPHYSSTATE_NOP || new > OPA_PORTPHYSSTATE_MAX) {
		pr_warn("invalid physical state(s) (old %d new %d)\n",
			old, new);
		return HFI_TRANSITION_UNDEFINED;
	}

	if (new == IB_PORTPHYSSTATE_NOP)
		return HFI_TRANSITION_ALLOWED; /* always allowed */

	/* adjust states for indexing into physical_state_transitions */
	old -= IB_PORTPHYSSTATE_POLLING;
	new -= IB_PORTPHYSSTATE_POLLING;

	if (old < 0 || new < 0)
		return HFI_TRANSITION_UNDEFINED;
	return physical_state_transitions.allowed[old][new];
}

static int port_states_transition_allowed(struct hfi1_pportdata *ppd,
					  u32 logical_new, u32 physical_new)
{
	u32 physical_old = driver_pstate(ppd);
	u32 logical_old = driver_lstate(ppd);
	int ret, logical_allowed, physical_allowed;

	ret = logical_transition_allowed(logical_old, logical_new);
	logical_allowed = ret;

	if (ret == HFI_TRANSITION_DISALLOWED ||
	    ret == HFI_TRANSITION_UNDEFINED) {
		pr_warn("invalid logical state transition %s -> %s\n",
			opa_lstate_name(logical_old),
			opa_lstate_name(logical_new));
		return ret;
	}

	ret = physical_transition_allowed(physical_old, physical_new);
	physical_allowed = ret;

	if (ret == HFI_TRANSITION_DISALLOWED ||
	    ret == HFI_TRANSITION_UNDEFINED) {
		pr_warn("invalid physical state transition %s -> %s\n",
			opa_pstate_name(physical_old),
			opa_pstate_name(physical_new));
		return ret;
	}

	if (logical_allowed == HFI_TRANSITION_IGNORED &&
	    physical_allowed == HFI_TRANSITION_IGNORED)
		return HFI_TRANSITION_IGNORED;

	/*
	 * A change request of Physical Port State from
	 * 'Offline' to 'Polling' should be ignored.
	 */
	if ((physical_old == OPA_PORTPHYSSTATE_OFFLINE) &&
	    (physical_new == IB_PORTPHYSSTATE_POLLING))
		return HFI_TRANSITION_IGNORED;

	/*
	 * Either physical_allowed or logical_allowed is
	 * HFI_TRANSITION_ALLOWED.
	 */
	return HFI_TRANSITION_ALLOWED;
}

static int set_port_states(struct hfi1_pportdata *ppd, struct opa_smp *smp,
			   u32 logical_state, u32 phys_state, int local_mad)
{
	struct hfi1_devdata *dd = ppd->dd;
	u32 link_state;
	int ret;

	ret = port_states_transition_allowed(ppd, logical_state, phys_state);
	if (ret == HFI_TRANSITION_DISALLOWED ||
	    ret == HFI_TRANSITION_UNDEFINED) {
		/* error message emitted above */
		smp->status |= IB_SMP_INVALID_FIELD;
		return 0;
	}

	if (ret == HFI_TRANSITION_IGNORED)
		return 0;

	if ((phys_state != IB_PORTPHYSSTATE_NOP) &&
	    !(logical_state == IB_PORT_DOWN ||
	      logical_state == IB_PORT_NOP)){
		pr_warn("SubnSet(OPA_PortInfo) port state invalid: logical_state 0x%x physical_state 0x%x\n",
			logical_state, phys_state);
		smp->status |= IB_SMP_INVALID_FIELD;
	}

	/*
	 * Logical state changes are summarized in OPAv1g1 spec.,
	 * Table 9-12; physical state changes are summarized in
	 * OPAv1g1 spec., Table 6.4.
	 */
	switch (logical_state) {
	case IB_PORT_NOP:
		if (phys_state == IB_PORTPHYSSTATE_NOP)
			break;
		fallthrough;
	case IB_PORT_DOWN:
		if (phys_state == IB_PORTPHYSSTATE_NOP) {
			link_state = HLS_DN_DOWNDEF;
		} else if (phys_state == IB_PORTPHYSSTATE_POLLING) {
			link_state = HLS_DN_POLL;
			set_link_down_reason(ppd, OPA_LINKDOWN_REASON_FM_BOUNCE,
					     0, OPA_LINKDOWN_REASON_FM_BOUNCE);
		} else if (phys_state == IB_PORTPHYSSTATE_DISABLED) {
			link_state = HLS_DN_DISABLE;
		} else {
			pr_warn("SubnSet(OPA_PortInfo) invalid physical state 0x%x\n",
				phys_state);
			smp->status |= IB_SMP_INVALID_FIELD;
			break;
		}

		if ((link_state == HLS_DN_POLL ||
		     link_state == HLS_DN_DOWNDEF)) {
			/*
			 * Going to poll.  No matter what the current state,
			 * always move offline first, then tune and start the
			 * link.  This correctly handles a FM link bounce and
			 * a link enable.  Going offline is a no-op if already
			 * offline.
			 */
			set_link_state(ppd, HLS_DN_OFFLINE);
			start_link(ppd);
		} else {
			set_link_state(ppd, link_state);
		}
		if (link_state == HLS_DN_DISABLE &&
		    (ppd->offline_disabled_reason >
		     HFI1_ODR_MASK(OPA_LINKDOWN_REASON_SMA_DISABLED) ||
		     ppd->offline_disabled_reason ==
		     HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE)))
			ppd->offline_disabled_reason =
			HFI1_ODR_MASK(OPA_LINKDOWN_REASON_SMA_DISABLED);
		/*
		 * Don't send a reply if the response would be sent
		 * through the disabled port.
		 */
		if (link_state == HLS_DN_DISABLE && !local_mad)
			return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
		break;
	case IB_PORT_ARMED:
		ret = set_link_state(ppd, HLS_UP_ARMED);
		if (!ret)
			send_idle_sma(dd, SMA_IDLE_ARM);
		break;
	case IB_PORT_ACTIVE:
		if (ppd->neighbor_normal) {
			ret = set_link_state(ppd, HLS_UP_ACTIVE);
			if (ret == 0)
				send_idle_sma(dd, SMA_IDLE_ACTIVE);
		} else {
			pr_warn("SubnSet(OPA_PortInfo) Cannot move to Active with NeighborNormal 0\n");
			smp->status |= IB_SMP_INVALID_FIELD;
		}
		break;
	default:
		pr_warn("SubnSet(OPA_PortInfo) invalid logical state 0x%x\n",
			logical_state);
		smp->status |= IB_SMP_INVALID_FIELD;
	}

	return 0;
}

/*
 * subn_set_opa_portinfo - set port information
 * @smp: the incoming SM packet
 * @ibdev: the infiniband device
 * @port: the port on the device
 *
 */
static int __subn_set_opa_portinfo(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len, int local_mad)
{
	struct opa_port_info *pi = (struct opa_port_info *)data;
	struct ib_event event;
	struct hfi1_devdata *dd;
	struct hfi1_pportdata *ppd;
	struct hfi1_ibport *ibp;
	u8 clientrereg;
	unsigned long flags;
	u32 smlid;
	u32 lid;
	u8 ls_old, ls_new, ps_new;
	u8 vls;
	u8 msl;
	u8 crc_enabled;
	u16 lse, lwe, mtu;
	u32 num_ports = OPA_AM_NPORT(am);
	u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
	int ret, i, invalid = 0, call_set_mtu = 0;
	int call_link_downgrade_policy = 0;

	if (num_ports != 1 ||
	    smp_length_check(sizeof(*pi), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	lid = be32_to_cpu(pi->lid);
	if (lid & 0xFF000000) {
		pr_warn("OPA_PortInfo lid out of range: %X\n", lid);
		smp->status |= IB_SMP_INVALID_FIELD;
		goto get_only;
	}


	smlid = be32_to_cpu(pi->sm_lid);
	if (smlid & 0xFF000000) {
		pr_warn("OPA_PortInfo SM lid out of range: %X\n", smlid);
		smp->status |= IB_SMP_INVALID_FIELD;
		goto get_only;
	}

	clientrereg = (pi->clientrereg_subnettimeout &
			OPA_PI_MASK_CLIENT_REREGISTER);

	dd = dd_from_ibdev(ibdev);
	/* IB numbers ports from 1, hw from 0 */
	ppd = dd->pport + (port - 1);
	ibp = &ppd->ibport_data;
	event.device = ibdev;
	event.element.port_num = port;

	ls_old = driver_lstate(ppd);

	ibp->rvp.mkey = pi->mkey;
	if (ibp->rvp.gid_prefix != pi->subnet_prefix) {
		ibp->rvp.gid_prefix = pi->subnet_prefix;
		event.event = IB_EVENT_GID_CHANGE;
		ib_dispatch_event(&event);
	}
	ibp->rvp.mkey_lease_period = be16_to_cpu(pi->mkey_lease_period);

	/* Must be a valid unicast LID address. */
	if ((lid == 0 && ls_old > IB_PORT_INIT) ||
	     (hfi1_is_16B_mcast(lid))) {
		smp->status |= IB_SMP_INVALID_FIELD;
		pr_warn("SubnSet(OPA_PortInfo) lid invalid 0x%x\n",
			lid);
	} else if (ppd->lid != lid ||
		 ppd->lmc != (pi->mkeyprotect_lmc & OPA_PI_MASK_LMC)) {
		if (ppd->lid != lid)
			hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LID_CHANGE_BIT);
		if (ppd->lmc != (pi->mkeyprotect_lmc & OPA_PI_MASK_LMC))
			hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LMC_CHANGE_BIT);
		hfi1_set_lid(ppd, lid, pi->mkeyprotect_lmc & OPA_PI_MASK_LMC);
		event.event = IB_EVENT_LID_CHANGE;
		ib_dispatch_event(&event);

		if (HFI1_PORT_GUID_INDEX + 1 < HFI1_GUIDS_PER_PORT) {
			/* Manufacture GID from LID to support extended
			 * addresses
			 */
			ppd->guids[HFI1_PORT_GUID_INDEX + 1] =
				be64_to_cpu(OPA_MAKE_ID(lid));
			event.event = IB_EVENT_GID_CHANGE;
			ib_dispatch_event(&event);
		}
	}

	msl = pi->smsl & OPA_PI_MASK_SMSL;
	if (pi->partenforce_filterraw & OPA_PI_MASK_LINKINIT_REASON)
		ppd->linkinit_reason =
			(pi->partenforce_filterraw &
			 OPA_PI_MASK_LINKINIT_REASON);

	/* Must be a valid unicast LID address. */
	if ((smlid == 0 && ls_old > IB_PORT_INIT) ||
	     (hfi1_is_16B_mcast(smlid))) {
		smp->status |= IB_SMP_INVALID_FIELD;
		pr_warn("SubnSet(OPA_PortInfo) smlid invalid 0x%x\n", smlid);
	} else if (smlid != ibp->rvp.sm_lid || msl != ibp->rvp.sm_sl) {
		pr_warn("SubnSet(OPA_PortInfo) smlid 0x%x\n", smlid);
		spin_lock_irqsave(&ibp->rvp.lock, flags);
		if (ibp->rvp.sm_ah) {
			if (smlid != ibp->rvp.sm_lid)
				hfi1_modify_qp0_ah(ibp, ibp->rvp.sm_ah, smlid);
			if (msl != ibp->rvp.sm_sl)
				rdma_ah_set_sl(&ibp->rvp.sm_ah->attr, msl);
		}
		spin_unlock_irqrestore(&ibp->rvp.lock, flags);
		if (smlid != ibp->rvp.sm_lid)
			ibp->rvp.sm_lid = smlid;
		if (msl != ibp->rvp.sm_sl)
			ibp->rvp.sm_sl = msl;
		event.event = IB_EVENT_SM_CHANGE;
		ib_dispatch_event(&event);
	}

	if (pi->link_down_reason == 0) {
		ppd->local_link_down_reason.sma = 0;
		ppd->local_link_down_reason.latest = 0;
	}

	if (pi->neigh_link_down_reason == 0) {
		ppd->neigh_link_down_reason.sma = 0;
		ppd->neigh_link_down_reason.latest = 0;
	}

	ppd->sm_trap_qp = be32_to_cpu(pi->sm_trap_qp);
	ppd->sa_qp = be32_to_cpu(pi->sa_qp);

	ppd->port_error_action = be32_to_cpu(pi->port_error_action);
	lwe = be16_to_cpu(pi->link_width.enabled);
	if (lwe) {
		if (lwe == OPA_LINK_WIDTH_RESET ||
		    lwe == OPA_LINK_WIDTH_RESET_OLD)
			set_link_width_enabled(ppd, ppd->link_width_supported);
		else if ((lwe & ~ppd->link_width_supported) == 0)
			set_link_width_enabled(ppd, lwe);
		else
			smp->status |= IB_SMP_INVALID_FIELD;
	}
	lwe = be16_to_cpu(pi->link_width_downgrade.enabled);
	/* LWD.E is always applied - 0 means "disabled" */
	if (lwe == OPA_LINK_WIDTH_RESET ||
	    lwe == OPA_LINK_WIDTH_RESET_OLD) {
		set_link_width_downgrade_enabled(ppd,
						 ppd->
						 link_width_downgrade_supported
						 );
	} else if ((lwe & ~ppd->link_width_downgrade_supported) == 0) {
		/* only set and apply if something changed */
		if (lwe != ppd->link_width_downgrade_enabled) {
			set_link_width_downgrade_enabled(ppd, lwe);
			call_link_downgrade_policy = 1;
		}
	} else {
		smp->status |= IB_SMP_INVALID_FIELD;
	}
	lse = be16_to_cpu(pi->link_speed.enabled);
	if (lse) {
		if (lse & be16_to_cpu(pi->link_speed.supported))
			set_link_speed_enabled(ppd, lse);
		else
			smp->status |= IB_SMP_INVALID_FIELD;
	}

	ibp->rvp.mkeyprot =
		(pi->mkeyprotect_lmc & OPA_PI_MASK_MKEY_PROT_BIT) >> 6;
	ibp->rvp.vl_high_limit = be16_to_cpu(pi->vl.high_limit) & 0xFF;
	(void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_VL_HIGH_LIMIT,
				    ibp->rvp.vl_high_limit);

	if (ppd->vls_supported / 2 > ARRAY_SIZE(pi->neigh_mtu.pvlx_to_mtu) ||
	    ppd->vls_supported > ARRAY_SIZE(dd->vld)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}
	for (i = 0; i < ppd->vls_supported; i++) {
		if ((i % 2) == 0)
			mtu = enum_to_mtu((pi->neigh_mtu.pvlx_to_mtu[i / 2] >>
					   4) & 0xF);
		else
			mtu = enum_to_mtu(pi->neigh_mtu.pvlx_to_mtu[i / 2] &
					  0xF);
		if (mtu == 0xffff) {
			pr_warn("SubnSet(OPA_PortInfo) mtu invalid %d (0x%x)\n",
				mtu,
				(pi->neigh_mtu.pvlx_to_mtu[0] >> 4) & 0xF);
			smp->status |= IB_SMP_INVALID_FIELD;
			mtu = hfi1_max_mtu; /* use a valid MTU */
		}
		if (dd->vld[i].mtu != mtu) {
			dd_dev_info(dd,
				    "MTU change on vl %d from %d to %d\n",
				    i, dd->vld[i].mtu, mtu);
			dd->vld[i].mtu = mtu;
			call_set_mtu++;
		}
	}
	/* As per OPAV1 spec: VL15 must support and be configured
	 * for operation with a 2048 or larger MTU.
	 */
	mtu = enum_to_mtu(pi->neigh_mtu.pvlx_to_mtu[15 / 2] & 0xF);
	if (mtu < 2048 || mtu == 0xffff)
		mtu = 2048;
	if (dd->vld[15].mtu != mtu) {
		dd_dev_info(dd,
			    "MTU change on vl 15 from %d to %d\n",
			    dd->vld[15].mtu, mtu);
		dd->vld[15].mtu = mtu;
		call_set_mtu++;
	}
	if (call_set_mtu)
		set_mtu(ppd);

	/* Set operational VLs */
	vls = pi->operational_vls & OPA_PI_MASK_OPERATIONAL_VL;
	if (vls) {
		if (vls > ppd->vls_supported) {
			pr_warn("SubnSet(OPA_PortInfo) VL's supported invalid %d\n",
				pi->operational_vls);
			smp->status |= IB_SMP_INVALID_FIELD;
		} else {
			if (hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_OP_VLS,
					    vls) == -EINVAL)
				smp->status |= IB_SMP_INVALID_FIELD;
		}
	}

	if (pi->mkey_violations == 0)
		ibp->rvp.mkey_violations = 0;

	if (pi->pkey_violations == 0)
		ibp->rvp.pkey_violations = 0;

	if (pi->qkey_violations == 0)
		ibp->rvp.qkey_violations = 0;

	ibp->rvp.subnet_timeout =
		pi->clientrereg_subnettimeout & OPA_PI_MASK_SUBNET_TIMEOUT;

	crc_enabled = be16_to_cpu(pi->port_ltp_crc_mode);
	crc_enabled >>= 4;
	crc_enabled &= 0xf;

	if (crc_enabled != 0)
		ppd->port_crc_mode_enabled = port_ltp_to_cap(crc_enabled);

	ppd->is_active_optimize_enabled =
			!!(be16_to_cpu(pi->port_mode)
					& OPA_PI_MASK_PORT_ACTIVE_OPTOMIZE);

	ls_new = pi->port_states.portphysstate_portstate &
			OPA_PI_MASK_PORT_STATE;
	ps_new = (pi->port_states.portphysstate_portstate &
			OPA_PI_MASK_PORT_PHYSICAL_STATE) >> 4;

	if (ls_old == IB_PORT_INIT) {
		if (start_of_sm_config) {
			if (ls_new == ls_old || (ls_new == IB_PORT_ARMED))
				ppd->is_sm_config_started = 1;
		} else if (ls_new == IB_PORT_ARMED) {
			if (ppd->is_sm_config_started == 0) {
				invalid = 1;
				smp->status |= IB_SMP_INVALID_FIELD;
			}
		}
	}

	/* Handle CLIENT_REREGISTER event b/c SM asked us for it */
	if (clientrereg) {
		event.event = IB_EVENT_CLIENT_REREGISTER;
		ib_dispatch_event(&event);
	}

	/*
	 * Do the port state change now that the other link parameters
	 * have been set.
	 * Changing the port physical state only makes sense if the link
	 * is down or is being set to down.
	 */

	if (!invalid) {
		ret = set_port_states(ppd, smp, ls_new, ps_new, local_mad);
		if (ret)
			return ret;
	}

	ret = __subn_get_opa_portinfo(smp, am, data, ibdev, port, resp_len,
				      max_len);

	/* restore re-reg bit per o14-12.2.1 */
	pi->clientrereg_subnettimeout |= clientrereg;

	/*
	 * Apply the new link downgrade policy.  This may result in a link
	 * bounce.  Do this after everything else so things are settled.
	 * Possible problem: if setting the port state above fails, then
	 * the policy change is not applied.
	 */
	if (call_link_downgrade_policy)
		apply_link_downgrade_policy(ppd, 0);

	return ret;

get_only:
	return __subn_get_opa_portinfo(smp, am, data, ibdev, port, resp_len,
				       max_len);
}

/**
 * set_pkeys - set the PKEY table for ctxt 0
 * @dd: the hfi1_ib device
 * @port: the IB port number
 * @pkeys: the PKEY table
 */
static int set_pkeys(struct hfi1_devdata *dd, u32 port, u16 *pkeys)
{
	struct hfi1_pportdata *ppd;
	int i;
	int changed = 0;
	int update_includes_mgmt_partition = 0;

	/*
	 * IB port one/two always maps to context zero/one,
	 * always a kernel context, no locking needed
	 * If we get here with ppd setup, no need to check
	 * that rcd is valid.
	 */
	ppd = dd->pport + (port - 1);
	/*
	 * If the update does not include the management pkey, don't do it.
	 */
	for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
		if (pkeys[i] == LIM_MGMT_P_KEY) {
			update_includes_mgmt_partition = 1;
			break;
		}
	}

	if (!update_includes_mgmt_partition)
		return 1;

	for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) {
		u16 key = pkeys[i];
		u16 okey = ppd->pkeys[i];

		if (key == okey)
			continue;
		/*
		 * The SM gives us the complete PKey table. We have
		 * to ensure that we put the PKeys in the matching
		 * slots.
		 */
		ppd->pkeys[i] = key;
		changed = 1;
	}

	if (changed) {
		(void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
		hfi1_event_pkey_change(dd, port);
	}

	return 0;
}

static int __subn_set_opa_pkeytable(struct opa_smp *smp, u32 am, u8 *data,
				    struct ib_device *ibdev, u32 port,
				    u32 *resp_len, u32 max_len)
{
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	u32 n_blocks_sent = OPA_AM_NBLK(am);
	u32 start_block = am & 0x7ff;
	u16 *p = (u16 *)data;
	__be16 *q = (__be16 *)data;
	int i;
	u16 n_blocks_avail;
	unsigned npkeys = hfi1_get_npkeys(dd);
	u32 size = 0;

	if (n_blocks_sent == 0) {
		pr_warn("OPA Get PKey AM Invalid : P = %u; B = 0x%x; N = 0x%x\n",
			port, start_block, n_blocks_sent);
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	n_blocks_avail = (u16)(npkeys / OPA_PARTITION_TABLE_BLK_SIZE) + 1;

	size = sizeof(u16) * (n_blocks_sent * OPA_PARTITION_TABLE_BLK_SIZE);

	if (smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	if (start_block + n_blocks_sent > n_blocks_avail ||
	    n_blocks_sent > OPA_NUM_PKEY_BLOCKS_PER_SMP) {
		pr_warn("OPA Set PKey AM Invalid : s 0x%x; req 0x%x; avail 0x%x; blk/smp 0x%lx\n",
			start_block, n_blocks_sent, n_blocks_avail,
			OPA_NUM_PKEY_BLOCKS_PER_SMP);
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	for (i = 0; i < n_blocks_sent * OPA_PARTITION_TABLE_BLK_SIZE; i++)
		p[i] = be16_to_cpu(q[i]);

	if (start_block == 0 && set_pkeys(dd, port, p) != 0) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	return __subn_get_opa_pkeytable(smp, am, data, ibdev, port, resp_len,
					max_len);
}

#define ILLEGAL_VL 12
/*
 * filter_sc2vlt changes mappings to VL15 to ILLEGAL_VL (except
 * for SC15, which must map to VL15). If we don't remap things this
 * way it is possible for VL15 counters to increment when we try to
 * send on a SC which is mapped to an invalid VL.
 * When getting the table convert ILLEGAL_VL back to VL15.
 */
static void filter_sc2vlt(void *data, bool set)
{
	int i;
	u8 *pd = data;

	for (i = 0; i < OPA_MAX_SCS; i++) {
		if (i == 15)
			continue;

		if (set) {
			if ((pd[i] & 0x1f) == 0xf)
				pd[i] = ILLEGAL_VL;
		} else {
			if ((pd[i] & 0x1f) == ILLEGAL_VL)
				pd[i] = 0xf;
		}
	}
}

static int set_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
{
	u64 *val = data;

	filter_sc2vlt(data, true);

	write_csr(dd, SEND_SC2VLT0, *val++);
	write_csr(dd, SEND_SC2VLT1, *val++);
	write_csr(dd, SEND_SC2VLT2, *val++);
	write_csr(dd, SEND_SC2VLT3, *val++);
	write_seqlock_irq(&dd->sc2vl_lock);
	memcpy(dd->sc2vl, data, sizeof(dd->sc2vl));
	write_sequnlock_irq(&dd->sc2vl_lock);
	return 0;
}

static int get_sc2vlt_tables(struct hfi1_devdata *dd, void *data)
{
	u64 *val = (u64 *)data;

	*val++ = read_csr(dd, SEND_SC2VLT0);
	*val++ = read_csr(dd, SEND_SC2VLT1);
	*val++ = read_csr(dd, SEND_SC2VLT2);
	*val++ = read_csr(dd, SEND_SC2VLT3);

	filter_sc2vlt((u64 *)data, false);
	return 0;
}

static int __subn_get_opa_sl_to_sc(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	u8 *p = data;
	size_t size = ARRAY_SIZE(ibp->sl_to_sc); /* == 32 */
	unsigned i;

	if (am || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	for (i = 0; i < ARRAY_SIZE(ibp->sl_to_sc); i++)
		*p++ = ibp->sl_to_sc[i];

	if (resp_len)
		*resp_len += size;

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_sl_to_sc(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	u8 *p = data;
	size_t size = ARRAY_SIZE(ibp->sl_to_sc);
	int i;
	u8 sc;

	if (am || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	for (i = 0; i <  ARRAY_SIZE(ibp->sl_to_sc); i++) {
		sc = *p++;
		if (ibp->sl_to_sc[i] != sc) {
			ibp->sl_to_sc[i] = sc;

			/* Put all stale qps into error state */
			hfi1_error_port_qps(ibp, i);
		}
	}

	return __subn_get_opa_sl_to_sc(smp, am, data, ibdev, port, resp_len,
				       max_len);
}

static int __subn_get_opa_sc_to_sl(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	u8 *p = data;
	size_t size = ARRAY_SIZE(ibp->sc_to_sl); /* == 32 */
	unsigned i;

	if (am || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	for (i = 0; i < ARRAY_SIZE(ibp->sc_to_sl); i++)
		*p++ = ibp->sc_to_sl[i];

	if (resp_len)
		*resp_len += size;

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_sc_to_sl(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	size_t size = ARRAY_SIZE(ibp->sc_to_sl);
	u8 *p = data;
	int i;

	if (am || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	for (i = 0; i < ARRAY_SIZE(ibp->sc_to_sl); i++)
		ibp->sc_to_sl[i] = *p++;

	return __subn_get_opa_sc_to_sl(smp, am, data, ibdev, port, resp_len,
				       max_len);
}

static int __subn_get_opa_sc_to_vlt(struct opa_smp *smp, u32 am, u8 *data,
				    struct ib_device *ibdev, u32 port,
				    u32 *resp_len, u32 max_len)
{
	u32 n_blocks = OPA_AM_NBLK(am);
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	void *vp = (void *)data;
	size_t size = 4 * sizeof(u64);

	if (n_blocks != 1 || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	get_sc2vlt_tables(dd, vp);

	if (resp_len)
		*resp_len += size;

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_sc_to_vlt(struct opa_smp *smp, u32 am, u8 *data,
				    struct ib_device *ibdev, u32 port,
				    u32 *resp_len, u32 max_len)
{
	u32 n_blocks = OPA_AM_NBLK(am);
	int async_update = OPA_AM_ASYNC(am);
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	void *vp = (void *)data;
	struct hfi1_pportdata *ppd;
	int lstate;
	/*
	 * set_sc2vlt_tables writes the information contained in *data
	 * to four 64-bit registers SendSC2VLt[0-3]. We need to make
	 * sure *max_len is not greater than the total size of the four
	 * SendSC2VLt[0-3] registers.
	 */
	size_t size = 4 * sizeof(u64);

	if (n_blocks != 1 || async_update || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	/* IB numbers ports from 1, hw from 0 */
	ppd = dd->pport + (port - 1);
	lstate = driver_lstate(ppd);
	/*
	 * it's known that async_update is 0 by this point, but include
	 * the explicit check for clarity
	 */
	if (!async_update &&
	    (lstate == IB_PORT_ARMED || lstate == IB_PORT_ACTIVE)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	set_sc2vlt_tables(dd, vp);

	return __subn_get_opa_sc_to_vlt(smp, am, data, ibdev, port, resp_len,
					max_len);
}

static int __subn_get_opa_sc_to_vlnt(struct opa_smp *smp, u32 am, u8 *data,
				     struct ib_device *ibdev, u32 port,
				     u32 *resp_len, u32 max_len)
{
	u32 n_blocks = OPA_AM_NPORT(am);
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_pportdata *ppd;
	void *vp = (void *)data;
	int size = sizeof(struct sc2vlnt);

	if (n_blocks != 1 || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	ppd = dd->pport + (port - 1);

	fm_get_table(ppd, FM_TBL_SC2VLNT, vp);

	if (resp_len)
		*resp_len += size;

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_sc_to_vlnt(struct opa_smp *smp, u32 am, u8 *data,
				     struct ib_device *ibdev, u32 port,
				     u32 *resp_len, u32 max_len)
{
	u32 n_blocks = OPA_AM_NPORT(am);
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_pportdata *ppd;
	void *vp = (void *)data;
	int lstate;
	int size = sizeof(struct sc2vlnt);

	if (n_blocks != 1 || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	/* IB numbers ports from 1, hw from 0 */
	ppd = dd->pport + (port - 1);
	lstate = driver_lstate(ppd);
	if (lstate == IB_PORT_ARMED || lstate == IB_PORT_ACTIVE) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	ppd = dd->pport + (port - 1);

	fm_set_table(ppd, FM_TBL_SC2VLNT, vp);

	return __subn_get_opa_sc_to_vlnt(smp, am, data, ibdev, port,
					 resp_len, max_len);
}

static int __subn_get_opa_psi(struct opa_smp *smp, u32 am, u8 *data,
			      struct ib_device *ibdev, u32 port,
			      u32 *resp_len, u32 max_len)
{
	u32 nports = OPA_AM_NPORT(am);
	u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
	u32 lstate;
	struct hfi1_ibport *ibp;
	struct hfi1_pportdata *ppd;
	struct opa_port_state_info *psi = (struct opa_port_state_info *)data;

	if (nports != 1 || smp_length_check(sizeof(*psi), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	ibp = to_iport(ibdev, port);
	ppd = ppd_from_ibp(ibp);

	lstate = driver_lstate(ppd);

	if (start_of_sm_config && (lstate == IB_PORT_INIT))
		ppd->is_sm_config_started = 1;

	psi->port_states.ledenable_offlinereason = ppd->neighbor_normal << 4;
	psi->port_states.ledenable_offlinereason |=
		ppd->is_sm_config_started << 5;
	psi->port_states.ledenable_offlinereason |=
		ppd->offline_disabled_reason;

	psi->port_states.portphysstate_portstate =
		(driver_pstate(ppd) << 4) | (lstate & 0xf);
	psi->link_width_downgrade_tx_active =
		cpu_to_be16(ppd->link_width_downgrade_tx_active);
	psi->link_width_downgrade_rx_active =
		cpu_to_be16(ppd->link_width_downgrade_rx_active);
	if (resp_len)
		*resp_len += sizeof(struct opa_port_state_info);

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_psi(struct opa_smp *smp, u32 am, u8 *data,
			      struct ib_device *ibdev, u32 port,
			      u32 *resp_len, u32 max_len, int local_mad)
{
	u32 nports = OPA_AM_NPORT(am);
	u32 start_of_sm_config = OPA_AM_START_SM_CFG(am);
	u32 ls_old;
	u8 ls_new, ps_new;
	struct hfi1_ibport *ibp;
	struct hfi1_pportdata *ppd;
	struct opa_port_state_info *psi = (struct opa_port_state_info *)data;
	int ret, invalid = 0;

	if (nports != 1 || smp_length_check(sizeof(*psi), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	ibp = to_iport(ibdev, port);
	ppd = ppd_from_ibp(ibp);

	ls_old = driver_lstate(ppd);

	ls_new = port_states_to_logical_state(&psi->port_states);
	ps_new = port_states_to_phys_state(&psi->port_states);

	if (ls_old == IB_PORT_INIT) {
		if (start_of_sm_config) {
			if (ls_new == ls_old || (ls_new == IB_PORT_ARMED))
				ppd->is_sm_config_started = 1;
		} else if (ls_new == IB_PORT_ARMED) {
			if (ppd->is_sm_config_started == 0) {
				invalid = 1;
				smp->status |= IB_SMP_INVALID_FIELD;
			}
		}
	}

	if (!invalid) {
		ret = set_port_states(ppd, smp, ls_new, ps_new, local_mad);
		if (ret)
			return ret;
	}

	return __subn_get_opa_psi(smp, am, data, ibdev, port, resp_len,
				  max_len);
}

static int __subn_get_opa_cable_info(struct opa_smp *smp, u32 am, u8 *data,
				     struct ib_device *ibdev, u32 port,
				     u32 *resp_len, u32 max_len)
{
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	u32 addr = OPA_AM_CI_ADDR(am);
	u32 len = OPA_AM_CI_LEN(am) + 1;
	int ret;

	if (dd->pport->port_type != PORT_TYPE_QSFP ||
	    smp_length_check(len, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

#define __CI_PAGE_SIZE BIT(7) /* 128 bytes */
#define __CI_PAGE_MASK ~(__CI_PAGE_SIZE - 1)
#define __CI_PAGE_NUM(a) ((a) & __CI_PAGE_MASK)

	/*
	 * check that addr is within spec, and
	 * addr and (addr + len - 1) are on the same "page"
	 */
	if (addr >= 4096 ||
	    (__CI_PAGE_NUM(addr) != __CI_PAGE_NUM(addr + len - 1))) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	ret = get_cable_info(dd, port, addr, len, data);

	if (ret == -ENODEV) {
		smp->status |= IB_SMP_UNSUP_METH_ATTR;
		return reply((struct ib_mad_hdr *)smp);
	}

	/* The address range for the CableInfo SMA query is wider than the
	 * memory available on the QSFP cable. We want to return a valid
	 * response, albeit zeroed out, for address ranges beyond available
	 * memory but that are within the CableInfo query spec
	 */
	if (ret < 0 && ret != -ERANGE) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	if (resp_len)
		*resp_len += len;

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_get_opa_bct(struct opa_smp *smp, u32 am, u8 *data,
			      struct ib_device *ibdev, u32 port, u32 *resp_len,
			      u32 max_len)
{
	u32 num_ports = OPA_AM_NPORT(am);
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_pportdata *ppd;
	struct buffer_control *p = (struct buffer_control *)data;
	int size = sizeof(struct buffer_control);

	if (num_ports != 1 || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	ppd = dd->pport + (port - 1);
	fm_get_table(ppd, FM_TBL_BUFFER_CONTROL, p);
	trace_bct_get(dd, p);
	if (resp_len)
		*resp_len += size;

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_bct(struct opa_smp *smp, u32 am, u8 *data,
			      struct ib_device *ibdev, u32 port, u32 *resp_len,
			      u32 max_len)
{
	u32 num_ports = OPA_AM_NPORT(am);
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_pportdata *ppd;
	struct buffer_control *p = (struct buffer_control *)data;

	if (num_ports != 1 || smp_length_check(sizeof(*p), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}
	ppd = dd->pport + (port - 1);
	trace_bct_set(dd, p);
	if (fm_set_table(ppd, FM_TBL_BUFFER_CONTROL, p) < 0) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	return __subn_get_opa_bct(smp, am, data, ibdev, port, resp_len,
				  max_len);
}

static int __subn_get_opa_vl_arb(struct opa_smp *smp, u32 am, u8 *data,
				 struct ib_device *ibdev, u32 port,
				 u32 *resp_len, u32 max_len)
{
	struct hfi1_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
	u32 num_ports = OPA_AM_NPORT(am);
	u8 section = (am & 0x00ff0000) >> 16;
	u8 *p = data;
	int size = 256;

	if (num_ports != 1 || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	switch (section) {
	case OPA_VLARB_LOW_ELEMENTS:
		fm_get_table(ppd, FM_TBL_VL_LOW_ARB, p);
		break;
	case OPA_VLARB_HIGH_ELEMENTS:
		fm_get_table(ppd, FM_TBL_VL_HIGH_ARB, p);
		break;
	case OPA_VLARB_PREEMPT_ELEMENTS:
		fm_get_table(ppd, FM_TBL_VL_PREEMPT_ELEMS, p);
		break;
	case OPA_VLARB_PREEMPT_MATRIX:
		fm_get_table(ppd, FM_TBL_VL_PREEMPT_MATRIX, p);
		break;
	default:
		pr_warn("OPA SubnGet(VL Arb) AM Invalid : 0x%x\n",
			be32_to_cpu(smp->attr_mod));
		smp->status |= IB_SMP_INVALID_FIELD;
		size = 0;
		break;
	}

	if (size > 0 && resp_len)
		*resp_len += size;

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_vl_arb(struct opa_smp *smp, u32 am, u8 *data,
				 struct ib_device *ibdev, u32 port,
				 u32 *resp_len, u32 max_len)
{
	struct hfi1_pportdata *ppd = ppd_from_ibp(to_iport(ibdev, port));
	u32 num_ports = OPA_AM_NPORT(am);
	u8 section = (am & 0x00ff0000) >> 16;
	u8 *p = data;
	int size = 256;

	if (num_ports != 1 || smp_length_check(size, max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	switch (section) {
	case OPA_VLARB_LOW_ELEMENTS:
		(void)fm_set_table(ppd, FM_TBL_VL_LOW_ARB, p);
		break;
	case OPA_VLARB_HIGH_ELEMENTS:
		(void)fm_set_table(ppd, FM_TBL_VL_HIGH_ARB, p);
		break;
	/*
	 * neither OPA_VLARB_PREEMPT_ELEMENTS, or OPA_VLARB_PREEMPT_MATRIX
	 * can be changed from the default values
	 */
	case OPA_VLARB_PREEMPT_ELEMENTS:
	case OPA_VLARB_PREEMPT_MATRIX:
		smp->status |= IB_SMP_UNSUP_METH_ATTR;
		break;
	default:
		pr_warn("OPA SubnSet(VL Arb) AM Invalid : 0x%x\n",
			be32_to_cpu(smp->attr_mod));
		smp->status |= IB_SMP_INVALID_FIELD;
		break;
	}

	return __subn_get_opa_vl_arb(smp, am, data, ibdev, port, resp_len,
				     max_len);
}

struct opa_pma_mad {
	struct ib_mad_hdr mad_hdr;
	u8 data[2024];
} __packed;

struct opa_port_status_req {
	__u8 port_num;
	__u8 reserved[3];
	__be32 vl_select_mask;
};

#define VL_MASK_ALL		0x00000000000080ffUL

struct opa_port_status_rsp {
	__u8 port_num;
	__u8 reserved[3];
	__be32  vl_select_mask;

	/* Data counters */
	__be64 port_xmit_data;
	__be64 port_rcv_data;
	__be64 port_xmit_pkts;
	__be64 port_rcv_pkts;
	__be64 port_multicast_xmit_pkts;
	__be64 port_multicast_rcv_pkts;
	__be64 port_xmit_wait;
	__be64 sw_port_congestion;
	__be64 port_rcv_fecn;
	__be64 port_rcv_becn;
	__be64 port_xmit_time_cong;
	__be64 port_xmit_wasted_bw;
	__be64 port_xmit_wait_data;
	__be64 port_rcv_bubble;
	__be64 port_mark_fecn;
	/* Error counters */
	__be64 port_rcv_constraint_errors;
	__be64 port_rcv_switch_relay_errors;
	__be64 port_xmit_discards;
	__be64 port_xmit_constraint_errors;
	__be64 port_rcv_remote_physical_errors;
	__be64 local_link_integrity_errors;
	__be64 port_rcv_errors;
	__be64 excessive_buffer_overruns;
	__be64 fm_config_errors;
	__be32 link_error_recovery;
	__be32 link_downed;
	u8 uncorrectable_errors;

	u8 link_quality_indicator; /* 5res, 3bit */
	u8 res2[6];
	struct _vls_pctrs {
		/* per-VL Data counters */
		__be64 port_vl_xmit_data;
		__be64 port_vl_rcv_data;
		__be64 port_vl_xmit_pkts;
		__be64 port_vl_rcv_pkts;
		__be64 port_vl_xmit_wait;
		__be64 sw_port_vl_congestion;
		__be64 port_vl_rcv_fecn;
		__be64 port_vl_rcv_becn;
		__be64 port_xmit_time_cong;
		__be64 port_vl_xmit_wasted_bw;
		__be64 port_vl_xmit_wait_data;
		__be64 port_vl_rcv_bubble;
		__be64 port_vl_mark_fecn;
		__be64 port_vl_xmit_discards;
	} vls[]; /* real array size defined by # bits set in vl_select_mask */
};

enum counter_selects {
	CS_PORT_XMIT_DATA			= (1 << 31),
	CS_PORT_RCV_DATA			= (1 << 30),
	CS_PORT_XMIT_PKTS			= (1 << 29),
	CS_PORT_RCV_PKTS			= (1 << 28),
	CS_PORT_MCAST_XMIT_PKTS			= (1 << 27),
	CS_PORT_MCAST_RCV_PKTS			= (1 << 26),
	CS_PORT_XMIT_WAIT			= (1 << 25),
	CS_SW_PORT_CONGESTION			= (1 << 24),
	CS_PORT_RCV_FECN			= (1 << 23),
	CS_PORT_RCV_BECN			= (1 << 22),
	CS_PORT_XMIT_TIME_CONG			= (1 << 21),
	CS_PORT_XMIT_WASTED_BW			= (1 << 20),
	CS_PORT_XMIT_WAIT_DATA			= (1 << 19),
	CS_PORT_RCV_BUBBLE			= (1 << 18),
	CS_PORT_MARK_FECN			= (1 << 17),
	CS_PORT_RCV_CONSTRAINT_ERRORS		= (1 << 16),
	CS_PORT_RCV_SWITCH_RELAY_ERRORS		= (1 << 15),
	CS_PORT_XMIT_DISCARDS			= (1 << 14),
	CS_PORT_XMIT_CONSTRAINT_ERRORS		= (1 << 13),
	CS_PORT_RCV_REMOTE_PHYSICAL_ERRORS	= (1 << 12),
	CS_LOCAL_LINK_INTEGRITY_ERRORS		= (1 << 11),
	CS_PORT_RCV_ERRORS			= (1 << 10),
	CS_EXCESSIVE_BUFFER_OVERRUNS		= (1 << 9),
	CS_FM_CONFIG_ERRORS			= (1 << 8),
	CS_LINK_ERROR_RECOVERY			= (1 << 7),
	CS_LINK_DOWNED				= (1 << 6),
	CS_UNCORRECTABLE_ERRORS			= (1 << 5),
};

struct opa_clear_port_status {
	__be64 port_select_mask[4];
	__be32 counter_select_mask;
};

struct opa_aggregate {
	__be16 attr_id;
	__be16 err_reqlength;	/* 1 bit, 8 res, 7 bit */
	__be32 attr_mod;
	u8 data[];
};

#define MSK_LLI 0x000000f0
#define MSK_LLI_SFT 4
#define MSK_LER 0x0000000f
#define MSK_LER_SFT 0
#define ADD_LLI 8
#define ADD_LER 2

/* Request contains first three fields, response contains those plus the rest */
struct opa_port_data_counters_msg {
	__be64 port_select_mask[4];
	__be32 vl_select_mask;
	__be32 resolution;

	/* Response fields follow */
	struct _port_dctrs {
		u8 port_number;
		u8 reserved2[3];
		__be32 link_quality_indicator; /* 29res, 3bit */

		/* Data counters */
		__be64 port_xmit_data;
		__be64 port_rcv_data;
		__be64 port_xmit_pkts;
		__be64 port_rcv_pkts;
		__be64 port_multicast_xmit_pkts;
		__be64 port_multicast_rcv_pkts;
		__be64 port_xmit_wait;
		__be64 sw_port_congestion;
		__be64 port_rcv_fecn;
		__be64 port_rcv_becn;
		__be64 port_xmit_time_cong;
		__be64 port_xmit_wasted_bw;
		__be64 port_xmit_wait_data;
		__be64 port_rcv_bubble;
		__be64 port_mark_fecn;

		__be64 port_error_counter_summary;
		/* Sum of error counts/port */

		struct _vls_dctrs {
			/* per-VL Data counters */
			__be64 port_vl_xmit_data;
			__be64 port_vl_rcv_data;
			__be64 port_vl_xmit_pkts;
			__be64 port_vl_rcv_pkts;
			__be64 port_vl_xmit_wait;
			__be64 sw_port_vl_congestion;
			__be64 port_vl_rcv_fecn;
			__be64 port_vl_rcv_becn;
			__be64 port_xmit_time_cong;
			__be64 port_vl_xmit_wasted_bw;
			__be64 port_vl_xmit_wait_data;
			__be64 port_vl_rcv_bubble;
			__be64 port_vl_mark_fecn;
		} vls[0];
		/* array size defined by #bits set in vl_select_mask*/
	} port[1]; /* array size defined by  #ports in attribute modifier */
};

struct opa_port_error_counters64_msg {
	/*
	 * Request contains first two fields, response contains the
	 * whole magilla
	 */
	__be64 port_select_mask[4];
	__be32 vl_select_mask;

	/* Response-only fields follow */
	__be32 reserved1;
	struct _port_ectrs {
		u8 port_number;
		u8 reserved2[7];
		__be64 port_rcv_constraint_errors;
		__be64 port_rcv_switch_relay_errors;
		__be64 port_xmit_discards;
		__be64 port_xmit_constraint_errors;
		__be64 port_rcv_remote_physical_errors;
		__be64 local_link_integrity_errors;
		__be64 port_rcv_errors;
		__be64 excessive_buffer_overruns;
		__be64 fm_config_errors;
		__be32 link_error_recovery;
		__be32 link_downed;
		u8 uncorrectable_errors;
		u8 reserved3[7];
		struct _vls_ectrs {
			__be64 port_vl_xmit_discards;
		} vls[0];
		/* array size defined by #bits set in vl_select_mask */
	} port[1]; /* array size defined by #ports in attribute modifier */
};

struct opa_port_error_info_msg {
	__be64 port_select_mask[4];
	__be32 error_info_select_mask;
	__be32 reserved1;
	struct _port_ei {
		u8 port_number;
		u8 reserved2[7];

		/* PortRcvErrorInfo */
		struct {
			u8 status_and_code;
			union {
				u8 raw[17];
				struct {
					/* EI1to12 format */
					u8 packet_flit1[8];
					u8 packet_flit2[8];
					u8 remaining_flit_bits12;
				} ei1to12;
				struct {
					u8 packet_bytes[8];
					u8 remaining_flit_bits;
				} ei13;
			} ei;
			u8 reserved3[6];
		} __packed port_rcv_ei;

		/* ExcessiveBufferOverrunInfo */
		struct {
			u8 status_and_sc;
			u8 reserved4[7];
		} __packed excessive_buffer_overrun_ei;

		/* PortXmitConstraintErrorInfo */
		struct {
			u8 status;
			u8 reserved5;
			__be16 pkey;
			__be32 slid;
		} __packed port_xmit_constraint_ei;

		/* PortRcvConstraintErrorInfo */
		struct {
			u8 status;
			u8 reserved6;
			__be16 pkey;
			__be32 slid;
		} __packed port_rcv_constraint_ei;

		/* PortRcvSwitchRelayErrorInfo */
		struct {
			u8 status_and_code;
			u8 reserved7[3];
			__u32 error_info;
		} __packed port_rcv_switch_relay_ei;

		/* UncorrectableErrorInfo */
		struct {
			u8 status_and_code;
			u8 reserved8;
		} __packed uncorrectable_ei;

		/* FMConfigErrorInfo */
		struct {
			u8 status_and_code;
			u8 error_info;
		} __packed fm_config_ei;
		__u32 reserved9;
	} port[1]; /* actual array size defined by #ports in attr modifier */
};

/* opa_port_error_info_msg error_info_select_mask bit definitions */
enum error_info_selects {
	ES_PORT_RCV_ERROR_INFO			= (1 << 31),
	ES_EXCESSIVE_BUFFER_OVERRUN_INFO	= (1 << 30),
	ES_PORT_XMIT_CONSTRAINT_ERROR_INFO	= (1 << 29),
	ES_PORT_RCV_CONSTRAINT_ERROR_INFO	= (1 << 28),
	ES_PORT_RCV_SWITCH_RELAY_ERROR_INFO	= (1 << 27),
	ES_UNCORRECTABLE_ERROR_INFO		= (1 << 26),
	ES_FM_CONFIG_ERROR_INFO			= (1 << 25)
};

static int pma_get_opa_classportinfo(struct opa_pma_mad *pmp,
				     struct ib_device *ibdev, u32 *resp_len)
{
	struct opa_class_port_info *p =
		(struct opa_class_port_info *)pmp->data;

	memset(pmp->data, 0, sizeof(pmp->data));

	if (pmp->mad_hdr.attr_mod != 0)
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;

	p->base_version = OPA_MGMT_BASE_VERSION;
	p->class_version = OPA_SM_CLASS_VERSION;
	/*
	 * Expected response time is 4.096 usec. * 2^18 == 1.073741824 sec.
	 */
	p->cap_mask2_resp_time = cpu_to_be32(18);

	if (resp_len)
		*resp_len += sizeof(*p);

	return reply((struct ib_mad_hdr *)pmp);
}

static void a0_portstatus(struct hfi1_pportdata *ppd,
			  struct opa_port_status_rsp *rsp)
{
	if (!is_bx(ppd->dd)) {
		unsigned long vl;
		u64 sum_vl_xmit_wait = 0;
		unsigned long vl_all_mask = VL_MASK_ALL;

		for_each_set_bit(vl, &vl_all_mask, BITS_PER_LONG) {
			u64 tmp = sum_vl_xmit_wait +
				  read_port_cntr(ppd, C_TX_WAIT_VL,
						 idx_from_vl(vl));
			if (tmp < sum_vl_xmit_wait) {
				/* we wrapped */
				sum_vl_xmit_wait = (u64)~0;
				break;
			}
			sum_vl_xmit_wait = tmp;
		}
		if (be64_to_cpu(rsp->port_xmit_wait) > sum_vl_xmit_wait)
			rsp->port_xmit_wait = cpu_to_be64(sum_vl_xmit_wait);
	}
}

/**
 * tx_link_width - convert link width bitmask to integer
 * value representing actual link width.
 * @link_width: width of active link
 * @return: return index of the bit set in link_width var
 *
 * The function convert and return the index of bit set
 * that indicate the current link width.
 */
u16 tx_link_width(u16 link_width)
{
	int n = LINK_WIDTH_DEFAULT;
	u16 tx_width = n;

	while (link_width && n) {
		if (link_width & (1 << (n - 1))) {
			tx_width = n;
			break;
		}
		n--;
	}

	return tx_width;
}

/**
 * get_xmit_wait_counters - Convert HFI 's SendWaitCnt/SendWaitVlCnt
 * counter in unit of TXE cycle times to flit times.
 * @ppd: info of physical Hfi port
 * @link_width: width of active link
 * @link_speed: speed of active link
 * @vl: represent VL0-VL7, VL15 for PortVLXmitWait counters request
 * and if vl value is C_VL_COUNT, it represent SendWaitCnt
 * counter request
 * @return: return SendWaitCnt/SendWaitVlCnt counter value per vl.
 *
 * Convert SendWaitCnt/SendWaitVlCnt counter from TXE cycle times to
 * flit times. Call this function to samples these counters. This
 * function will calculate for previous state transition and update
 * current state at end of function using ppd->prev_link_width and
 * ppd->port_vl_xmit_wait_last to port_vl_xmit_wait_curr and link_width.
 */
u64 get_xmit_wait_counters(struct hfi1_pportdata *ppd,
			   u16 link_width, u16 link_speed, int vl)
{
	u64 port_vl_xmit_wait_curr;
	u64 delta_vl_xmit_wait;
	u64 xmit_wait_val;

	if (vl > C_VL_COUNT)
		return  0;
	if (vl < C_VL_COUNT)
		port_vl_xmit_wait_curr =
			read_port_cntr(ppd, C_TX_WAIT_VL, vl);
	else
		port_vl_xmit_wait_curr =
			read_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL);

	xmit_wait_val =
		port_vl_xmit_wait_curr -
		ppd->port_vl_xmit_wait_last[vl];
	delta_vl_xmit_wait =
		convert_xmit_counter(xmit_wait_val,
				     ppd->prev_link_width,
				     link_speed);

	ppd->vl_xmit_flit_cnt[vl] += delta_vl_xmit_wait;
	ppd->port_vl_xmit_wait_last[vl] = port_vl_xmit_wait_curr;
	ppd->prev_link_width = link_width;

	return ppd->vl_xmit_flit_cnt[vl];
}

static int pma_get_opa_portstatus(struct opa_pma_mad *pmp,
				  struct ib_device *ibdev,
				  u32 port, u32 *resp_len)
{
	struct opa_port_status_req *req =
		(struct opa_port_status_req *)pmp->data;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct opa_port_status_rsp *rsp;
	unsigned long vl_select_mask = be32_to_cpu(req->vl_select_mask);
	unsigned long vl;
	size_t response_data_size;
	u32 nports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
	u32 port_num = req->port_num;
	u8 num_vls = hweight64(vl_select_mask);
	struct _vls_pctrs *vlinfo;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	int vfi;
	u64 tmp, tmp2;
	u16 link_width;
	u16 link_speed;

	response_data_size = struct_size(rsp, vls, num_vls);
	if (response_data_size > sizeof(pmp->data)) {
		pmp->mad_hdr.status |= OPA_PM_STATUS_REQUEST_TOO_LARGE;
		return reply((struct ib_mad_hdr *)pmp);
	}

	if (nports != 1 || (port_num && port_num != port) ||
	    num_vls > OPA_MAX_VLS || (vl_select_mask & ~VL_MASK_ALL)) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	memset(pmp->data, 0, sizeof(pmp->data));

	rsp = (struct opa_port_status_rsp *)pmp->data;
	if (port_num)
		rsp->port_num = port_num;
	else
		rsp->port_num = port;

	rsp->port_rcv_constraint_errors =
		cpu_to_be64(read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
					   CNTR_INVALID_VL));

	hfi1_read_link_quality(dd, &rsp->link_quality_indicator);

	rsp->vl_select_mask = cpu_to_be32((u32)vl_select_mask);
	rsp->port_xmit_data = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_FLITS,
					  CNTR_INVALID_VL));
	rsp->port_rcv_data = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FLITS,
					 CNTR_INVALID_VL));
	rsp->port_xmit_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_PKTS,
					  CNTR_INVALID_VL));
	rsp->port_rcv_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_PKTS,
					 CNTR_INVALID_VL));
	rsp->port_multicast_xmit_pkts =
		cpu_to_be64(read_dev_cntr(dd, C_DC_MC_XMIT_PKTS,
					  CNTR_INVALID_VL));
	rsp->port_multicast_rcv_pkts =
		cpu_to_be64(read_dev_cntr(dd, C_DC_MC_RCV_PKTS,
					  CNTR_INVALID_VL));
	/*
	 * Convert PortXmitWait counter from TXE cycle times
	 * to flit times.
	 */
	link_width =
		tx_link_width(ppd->link_width_downgrade_tx_active);
	link_speed = get_link_speed(ppd->link_speed_active);
	rsp->port_xmit_wait =
		cpu_to_be64(get_xmit_wait_counters(ppd, link_width,
						   link_speed, C_VL_COUNT));
	rsp->port_rcv_fecn =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL));
	rsp->port_rcv_becn =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL));
	rsp->port_xmit_discards =
		cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD,
					   CNTR_INVALID_VL));
	rsp->port_xmit_constraint_errors =
		cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
					   CNTR_INVALID_VL));
	rsp->port_rcv_remote_physical_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
					  CNTR_INVALID_VL));
	rsp->local_link_integrity_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RX_REPLAY,
					  CNTR_INVALID_VL));
	tmp = read_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL);
	tmp2 = tmp + read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
				   CNTR_INVALID_VL);
	if (tmp2 > (u32)UINT_MAX || tmp2 < tmp) {
		/* overflow/wrapped */
		rsp->link_error_recovery = cpu_to_be32(~0);
	} else {
		rsp->link_error_recovery = cpu_to_be32(tmp2);
	}
	rsp->port_rcv_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL));
	rsp->excessive_buffer_overruns =
		cpu_to_be64(read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL));
	rsp->fm_config_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_FM_CFG_ERR,
					  CNTR_INVALID_VL));
	rsp->link_downed = cpu_to_be32(read_port_cntr(ppd, C_SW_LINK_DOWN,
						      CNTR_INVALID_VL));

	/* rsp->uncorrectable_errors is 8 bits wide, and it pegs at 0xff */
	tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);
	rsp->uncorrectable_errors = tmp < 0x100 ? (tmp & 0xff) : 0xff;

	vlinfo = &rsp->vls[0];
	vfi = 0;
	/* The vl_select_mask has been checked above, and we know
	 * that it contains only entries which represent valid VLs.
	 * So in the for_each_set_bit() loop below, we don't need
	 * any additional checks for vl.
	 */
	for_each_set_bit(vl, &vl_select_mask, BITS_PER_LONG) {
		memset(vlinfo, 0, sizeof(*vlinfo));

		tmp = read_dev_cntr(dd, C_DC_RX_FLIT_VL, idx_from_vl(vl));
		rsp->vls[vfi].port_vl_rcv_data = cpu_to_be64(tmp);

		rsp->vls[vfi].port_vl_rcv_pkts =
			cpu_to_be64(read_dev_cntr(dd, C_DC_RX_PKT_VL,
						  idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_xmit_data =
			cpu_to_be64(read_port_cntr(ppd, C_TX_FLIT_VL,
						   idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_xmit_pkts =
			cpu_to_be64(read_port_cntr(ppd, C_TX_PKT_VL,
						   idx_from_vl(vl)));
		/*
		 * Convert PortVlXmitWait counter from TXE cycle
		 * times to flit times.
		 */
		rsp->vls[vfi].port_vl_xmit_wait =
			cpu_to_be64(get_xmit_wait_counters(ppd, link_width,
							   link_speed,
							   idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_rcv_fecn =
			cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN_VL,
						  idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_rcv_becn =
			cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN_VL,
						  idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_xmit_discards =
			cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD_VL,
						   idx_from_vl(vl)));
		vlinfo++;
		vfi++;
	}

	a0_portstatus(ppd, rsp);

	if (resp_len)
		*resp_len += response_data_size;

	return reply((struct ib_mad_hdr *)pmp);
}

static u64 get_error_counter_summary(struct ib_device *ibdev, u32 port,
				     u8 res_lli, u8 res_ler)
{
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	u64 error_counter_summary = 0, tmp;

	error_counter_summary += read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
						CNTR_INVALID_VL);
	/* port_rcv_switch_relay_errors is 0 for HFIs */
	error_counter_summary += read_port_cntr(ppd, C_SW_XMIT_DSCD,
						CNTR_INVALID_VL);
	error_counter_summary += read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
						CNTR_INVALID_VL);
	error_counter_summary += read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
					       CNTR_INVALID_VL);
	/* local link integrity must be right-shifted by the lli resolution */
	error_counter_summary += (read_dev_cntr(dd, C_DC_RX_REPLAY,
						CNTR_INVALID_VL) >> res_lli);
	/* link error recovery must b right-shifted by the ler resolution */
	tmp = read_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL);
	tmp += read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT, CNTR_INVALID_VL);
	error_counter_summary += (tmp >> res_ler);
	error_counter_summary += read_dev_cntr(dd, C_DC_RCV_ERR,
					       CNTR_INVALID_VL);
	error_counter_summary += read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL);
	error_counter_summary += read_dev_cntr(dd, C_DC_FM_CFG_ERR,
					       CNTR_INVALID_VL);
	/* ppd->link_downed is a 32-bit value */
	error_counter_summary += read_port_cntr(ppd, C_SW_LINK_DOWN,
						CNTR_INVALID_VL);
	tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);
	/* this is an 8-bit quantity */
	error_counter_summary += tmp < 0x100 ? (tmp & 0xff) : 0xff;

	return error_counter_summary;
}

static void a0_datacounters(struct hfi1_pportdata *ppd, struct _port_dctrs *rsp)
{
	if (!is_bx(ppd->dd)) {
		unsigned long vl;
		u64 sum_vl_xmit_wait = 0;
		unsigned long vl_all_mask = VL_MASK_ALL;

		for_each_set_bit(vl, &vl_all_mask, BITS_PER_LONG) {
			u64 tmp = sum_vl_xmit_wait +
				  read_port_cntr(ppd, C_TX_WAIT_VL,
						 idx_from_vl(vl));
			if (tmp < sum_vl_xmit_wait) {
				/* we wrapped */
				sum_vl_xmit_wait = (u64)~0;
				break;
			}
			sum_vl_xmit_wait = tmp;
		}
		if (be64_to_cpu(rsp->port_xmit_wait) > sum_vl_xmit_wait)
			rsp->port_xmit_wait = cpu_to_be64(sum_vl_xmit_wait);
	}
}

static void pma_get_opa_port_dctrs(struct ib_device *ibdev,
				   struct _port_dctrs *rsp)
{
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);

	rsp->port_xmit_data = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_FLITS,
						CNTR_INVALID_VL));
	rsp->port_rcv_data = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FLITS,
						CNTR_INVALID_VL));
	rsp->port_xmit_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_XMIT_PKTS,
						CNTR_INVALID_VL));
	rsp->port_rcv_pkts = cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_PKTS,
						CNTR_INVALID_VL));
	rsp->port_multicast_xmit_pkts =
		cpu_to_be64(read_dev_cntr(dd, C_DC_MC_XMIT_PKTS,
					  CNTR_INVALID_VL));
	rsp->port_multicast_rcv_pkts =
		cpu_to_be64(read_dev_cntr(dd, C_DC_MC_RCV_PKTS,
					  CNTR_INVALID_VL));
}

static int pma_get_opa_datacounters(struct opa_pma_mad *pmp,
				    struct ib_device *ibdev,
				    u32 port, u32 *resp_len)
{
	struct opa_port_data_counters_msg *req =
		(struct opa_port_data_counters_msg *)pmp->data;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	struct _port_dctrs *rsp;
	struct _vls_dctrs *vlinfo;
	size_t response_data_size;
	u32 num_ports;
	u8 lq, num_vls;
	u8 res_lli, res_ler;
	u64 port_mask;
	u32 port_num;
	unsigned long vl;
	unsigned long vl_select_mask;
	int vfi;
	u16 link_width;
	u16 link_speed;

	num_ports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
	num_vls = hweight32(be32_to_cpu(req->vl_select_mask));
	vl_select_mask = be32_to_cpu(req->vl_select_mask);
	res_lli = (u8)(be32_to_cpu(req->resolution) & MSK_LLI) >> MSK_LLI_SFT;
	res_lli = res_lli ? res_lli + ADD_LLI : 0;
	res_ler = (u8)(be32_to_cpu(req->resolution) & MSK_LER) >> MSK_LER_SFT;
	res_ler = res_ler ? res_ler + ADD_LER : 0;

	if (num_ports != 1 || (vl_select_mask & ~VL_MASK_ALL)) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	/* Sanity check */
	response_data_size = struct_size(req, port[0].vls, num_vls);

	if (response_data_size > sizeof(pmp->data)) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	/*
	 * The bit set in the mask needs to be consistent with the
	 * port the request came in on.
	 */
	port_mask = be64_to_cpu(req->port_select_mask[3]);
	port_num = find_first_bit((unsigned long *)&port_mask,
				  sizeof(port_mask) * 8);

	if (port_num != port) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	rsp = &req->port[0];
	memset(rsp, 0, sizeof(*rsp));

	rsp->port_number = port;
	/*
	 * Note that link_quality_indicator is a 32 bit quantity in
	 * 'datacounters' queries (as opposed to 'portinfo' queries,
	 * where it's a byte).
	 */
	hfi1_read_link_quality(dd, &lq);
	rsp->link_quality_indicator = cpu_to_be32((u32)lq);
	pma_get_opa_port_dctrs(ibdev, rsp);

	/*
	 * Convert PortXmitWait counter from TXE
	 * cycle times to flit times.
	 */
	link_width =
		tx_link_width(ppd->link_width_downgrade_tx_active);
	link_speed = get_link_speed(ppd->link_speed_active);
	rsp->port_xmit_wait =
		cpu_to_be64(get_xmit_wait_counters(ppd, link_width,
						   link_speed, C_VL_COUNT));
	rsp->port_rcv_fecn =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL));
	rsp->port_rcv_becn =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL));
	rsp->port_error_counter_summary =
		cpu_to_be64(get_error_counter_summary(ibdev, port,
						      res_lli, res_ler));

	vlinfo = &rsp->vls[0];
	vfi = 0;
	/* The vl_select_mask has been checked above, and we know
	 * that it contains only entries which represent valid VLs.
	 * So in the for_each_set_bit() loop below, we don't need
	 * any additional checks for vl.
	 */
	for_each_set_bit(vl, &vl_select_mask, BITS_PER_LONG) {
		memset(vlinfo, 0, sizeof(*vlinfo));

		rsp->vls[vfi].port_vl_xmit_data =
			cpu_to_be64(read_port_cntr(ppd, C_TX_FLIT_VL,
						   idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_rcv_data =
			cpu_to_be64(read_dev_cntr(dd, C_DC_RX_FLIT_VL,
						  idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_xmit_pkts =
			cpu_to_be64(read_port_cntr(ppd, C_TX_PKT_VL,
						   idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_rcv_pkts =
			cpu_to_be64(read_dev_cntr(dd, C_DC_RX_PKT_VL,
						  idx_from_vl(vl)));

		/*
		 * Convert PortVlXmitWait counter from TXE
		 * cycle times to flit times.
		 */
		rsp->vls[vfi].port_vl_xmit_wait =
			cpu_to_be64(get_xmit_wait_counters(ppd, link_width,
							   link_speed,
							   idx_from_vl(vl)));

		rsp->vls[vfi].port_vl_rcv_fecn =
			cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_FCN_VL,
						  idx_from_vl(vl)));
		rsp->vls[vfi].port_vl_rcv_becn =
			cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_BCN_VL,
						  idx_from_vl(vl)));

		/* rsp->port_vl_xmit_time_cong is 0 for HFIs */
		/* rsp->port_vl_xmit_wasted_bw ??? */
		/* port_vl_xmit_wait_data - TXE (table 13-9 HFI spec) ???
		 * does this differ from rsp->vls[vfi].port_vl_xmit_wait
		 */
		/*rsp->vls[vfi].port_vl_mark_fecn =
		 *	cpu_to_be64(read_csr(dd, DCC_PRF_PORT_VL_MARK_FECN_CNT
		 *		+ offset));
		 */
		vlinfo++;
		vfi++;
	}

	a0_datacounters(ppd, rsp);

	if (resp_len)
		*resp_len += response_data_size;

	return reply((struct ib_mad_hdr *)pmp);
}

static int pma_get_ib_portcounters_ext(struct ib_pma_mad *pmp,
				       struct ib_device *ibdev, u32 port)
{
	struct ib_pma_portcounters_ext *p = (struct ib_pma_portcounters_ext *)
						pmp->data;
	struct _port_dctrs rsp;

	if (pmp->mad_hdr.attr_mod != 0 || p->port_select != port) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		goto bail;
	}

	memset(&rsp, 0, sizeof(rsp));
	pma_get_opa_port_dctrs(ibdev, &rsp);

	p->port_xmit_data = rsp.port_xmit_data;
	p->port_rcv_data = rsp.port_rcv_data;
	p->port_xmit_packets = rsp.port_xmit_pkts;
	p->port_rcv_packets = rsp.port_rcv_pkts;
	p->port_unicast_xmit_packets = 0;
	p->port_unicast_rcv_packets =  0;
	p->port_multicast_xmit_packets = rsp.port_multicast_xmit_pkts;
	p->port_multicast_rcv_packets = rsp.port_multicast_rcv_pkts;

bail:
	return reply((struct ib_mad_hdr *)pmp);
}

static void pma_get_opa_port_ectrs(struct ib_device *ibdev,
				   struct _port_ectrs *rsp, u32 port)
{
	u64 tmp, tmp2;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);

	tmp = read_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL);
	tmp2 = tmp + read_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
					CNTR_INVALID_VL);
	if (tmp2 > (u32)UINT_MAX || tmp2 < tmp) {
		/* overflow/wrapped */
		rsp->link_error_recovery = cpu_to_be32(~0);
	} else {
		rsp->link_error_recovery = cpu_to_be32(tmp2);
	}

	rsp->link_downed = cpu_to_be32(read_port_cntr(ppd, C_SW_LINK_DOWN,
						CNTR_INVALID_VL));
	rsp->port_rcv_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL));
	rsp->port_rcv_remote_physical_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
					  CNTR_INVALID_VL));
	rsp->port_rcv_switch_relay_errors = 0;
	rsp->port_xmit_discards =
		cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD,
					   CNTR_INVALID_VL));
	rsp->port_xmit_constraint_errors =
		cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_CSTR_ERR,
					   CNTR_INVALID_VL));
	rsp->port_rcv_constraint_errors =
		cpu_to_be64(read_port_cntr(ppd, C_SW_RCV_CSTR_ERR,
					   CNTR_INVALID_VL));
	rsp->local_link_integrity_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RX_REPLAY,
					  CNTR_INVALID_VL));
	rsp->excessive_buffer_overruns =
		cpu_to_be64(read_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL));
}

static int pma_get_opa_porterrors(struct opa_pma_mad *pmp,
				  struct ib_device *ibdev,
				  u32 port, u32 *resp_len)
{
	size_t response_data_size;
	struct _port_ectrs *rsp;
	u32 port_num;
	struct opa_port_error_counters64_msg *req;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	u32 num_ports;
	u8 num_pslm;
	u8 num_vls;
	struct hfi1_ibport *ibp;
	struct hfi1_pportdata *ppd;
	struct _vls_ectrs *vlinfo;
	unsigned long vl;
	u64 port_mask, tmp;
	unsigned long vl_select_mask;
	int vfi;

	req = (struct opa_port_error_counters64_msg *)pmp->data;

	num_ports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;

	num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));
	num_vls = hweight32(be32_to_cpu(req->vl_select_mask));

	if (num_ports != 1 || num_ports != num_pslm) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	response_data_size = struct_size(req, port[0].vls, num_vls);

	if (response_data_size > sizeof(pmp->data)) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}
	/*
	 * The bit set in the mask needs to be consistent with the
	 * port the request came in on.
	 */
	port_mask = be64_to_cpu(req->port_select_mask[3]);
	port_num = find_first_bit((unsigned long *)&port_mask,
				  sizeof(port_mask) * 8);

	if (port_num != port) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	rsp = &req->port[0];

	ibp = to_iport(ibdev, port_num);
	ppd = ppd_from_ibp(ibp);

	memset(rsp, 0, sizeof(*rsp));
	rsp->port_number = port_num;

	pma_get_opa_port_ectrs(ibdev, rsp, port_num);

	rsp->port_rcv_remote_physical_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RMT_PHY_ERR,
					  CNTR_INVALID_VL));
	rsp->fm_config_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_FM_CFG_ERR,
					  CNTR_INVALID_VL));
	tmp = read_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL);

	rsp->uncorrectable_errors = tmp < 0x100 ? (tmp & 0xff) : 0xff;
	rsp->port_rcv_errors =
		cpu_to_be64(read_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL));
	vlinfo = &rsp->vls[0];
	vfi = 0;
	vl_select_mask = be32_to_cpu(req->vl_select_mask);
	for_each_set_bit(vl, &vl_select_mask, BITS_PER_LONG) {
		memset(vlinfo, 0, sizeof(*vlinfo));
		rsp->vls[vfi].port_vl_xmit_discards =
			cpu_to_be64(read_port_cntr(ppd, C_SW_XMIT_DSCD_VL,
						   idx_from_vl(vl)));
		vlinfo += 1;
		vfi++;
	}

	if (resp_len)
		*resp_len += response_data_size;

	return reply((struct ib_mad_hdr *)pmp);
}

static int pma_get_ib_portcounters(struct ib_pma_mad *pmp,
				   struct ib_device *ibdev, u32 port)
{
	struct ib_pma_portcounters *p = (struct ib_pma_portcounters *)
		pmp->data;
	struct _port_ectrs rsp;
	u64 temp_link_overrun_errors;
	u64 temp_64;
	u32 temp_32;

	memset(&rsp, 0, sizeof(rsp));
	pma_get_opa_port_ectrs(ibdev, &rsp, port);

	if (pmp->mad_hdr.attr_mod != 0 || p->port_select != port) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		goto bail;
	}

	p->symbol_error_counter = 0; /* N/A for OPA */

	temp_32 = be32_to_cpu(rsp.link_error_recovery);
	if (temp_32 > 0xFFUL)
		p->link_error_recovery_counter = 0xFF;
	else
		p->link_error_recovery_counter = (u8)temp_32;

	temp_32 = be32_to_cpu(rsp.link_downed);
	if (temp_32 > 0xFFUL)
		p->link_downed_counter = 0xFF;
	else
		p->link_downed_counter = (u8)temp_32;

	temp_64 = be64_to_cpu(rsp.port_rcv_errors);
	if (temp_64 > 0xFFFFUL)
		p->port_rcv_errors = cpu_to_be16(0xFFFF);
	else
		p->port_rcv_errors = cpu_to_be16((u16)temp_64);

	temp_64 = be64_to_cpu(rsp.port_rcv_remote_physical_errors);
	if (temp_64 > 0xFFFFUL)
		p->port_rcv_remphys_errors = cpu_to_be16(0xFFFF);
	else
		p->port_rcv_remphys_errors = cpu_to_be16((u16)temp_64);

	temp_64 = be64_to_cpu(rsp.port_rcv_switch_relay_errors);
	p->port_rcv_switch_relay_errors = cpu_to_be16((u16)temp_64);

	temp_64 = be64_to_cpu(rsp.port_xmit_discards);
	if (temp_64 > 0xFFFFUL)
		p->port_xmit_discards = cpu_to_be16(0xFFFF);
	else
		p->port_xmit_discards = cpu_to_be16((u16)temp_64);

	temp_64 = be64_to_cpu(rsp.port_xmit_constraint_errors);
	if (temp_64 > 0xFFUL)
		p->port_xmit_constraint_errors = 0xFF;
	else
		p->port_xmit_constraint_errors = (u8)temp_64;

	temp_64 = be64_to_cpu(rsp.port_rcv_constraint_errors);
	if (temp_64 > 0xFFUL)
		p->port_rcv_constraint_errors = 0xFFUL;
	else
		p->port_rcv_constraint_errors = (u8)temp_64;

	/* LocalLink: 7:4, BufferOverrun: 3:0 */
	temp_64 = be64_to_cpu(rsp.local_link_integrity_errors);
	if (temp_64 > 0xFUL)
		temp_64 = 0xFUL;

	temp_link_overrun_errors = temp_64 << 4;

	temp_64 = be64_to_cpu(rsp.excessive_buffer_overruns);
	if (temp_64 > 0xFUL)
		temp_64 = 0xFUL;
	temp_link_overrun_errors |= temp_64;

	p->link_overrun_errors = (u8)temp_link_overrun_errors;

	p->vl15_dropped = 0; /* N/A for OPA */

bail:
	return reply((struct ib_mad_hdr *)pmp);
}

static int pma_get_opa_errorinfo(struct opa_pma_mad *pmp,
				 struct ib_device *ibdev,
				 u32 port, u32 *resp_len)
{
	size_t response_data_size;
	struct _port_ei *rsp;
	struct opa_port_error_info_msg *req;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	u64 port_mask;
	u32 num_ports;
	u32 port_num;
	u8 num_pslm;
	u64 reg;

	req = (struct opa_port_error_info_msg *)pmp->data;
	rsp = &req->port[0];

	num_ports = OPA_AM_NPORT(be32_to_cpu(pmp->mad_hdr.attr_mod));
	num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));

	memset(rsp, 0, sizeof(*rsp));

	if (num_ports != 1 || num_ports != num_pslm) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	/* Sanity check */
	response_data_size = sizeof(struct opa_port_error_info_msg);

	if (response_data_size > sizeof(pmp->data)) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	/*
	 * The bit set in the mask needs to be consistent with the port
	 * the request came in on.
	 */
	port_mask = be64_to_cpu(req->port_select_mask[3]);
	port_num = find_first_bit((unsigned long *)&port_mask,
				  sizeof(port_mask) * 8);

	if (port_num != port) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}
	rsp->port_number = port;

	/* PortRcvErrorInfo */
	rsp->port_rcv_ei.status_and_code =
		dd->err_info_rcvport.status_and_code;
	memcpy(&rsp->port_rcv_ei.ei.ei1to12.packet_flit1,
	       &dd->err_info_rcvport.packet_flit1, sizeof(u64));
	memcpy(&rsp->port_rcv_ei.ei.ei1to12.packet_flit2,
	       &dd->err_info_rcvport.packet_flit2, sizeof(u64));

	/* ExcessiverBufferOverrunInfo */
	reg = read_csr(dd, RCV_ERR_INFO);
	if (reg & RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SMASK) {
		/*
		 * if the RcvExcessBufferOverrun bit is set, save SC of
		 * first pkt that encountered an excess buffer overrun
		 */
		u8 tmp = (u8)reg;

		tmp &=  RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SC_SMASK;
		tmp <<= 2;
		rsp->excessive_buffer_overrun_ei.status_and_sc = tmp;
		/* set the status bit */
		rsp->excessive_buffer_overrun_ei.status_and_sc |= 0x80;
	}

	rsp->port_xmit_constraint_ei.status =
		dd->err_info_xmit_constraint.status;
	rsp->port_xmit_constraint_ei.pkey =
		cpu_to_be16(dd->err_info_xmit_constraint.pkey);
	rsp->port_xmit_constraint_ei.slid =
		cpu_to_be32(dd->err_info_xmit_constraint.slid);

	rsp->port_rcv_constraint_ei.status =
		dd->err_info_rcv_constraint.status;
	rsp->port_rcv_constraint_ei.pkey =
		cpu_to_be16(dd->err_info_rcv_constraint.pkey);
	rsp->port_rcv_constraint_ei.slid =
		cpu_to_be32(dd->err_info_rcv_constraint.slid);

	/* UncorrectableErrorInfo */
	rsp->uncorrectable_ei.status_and_code = dd->err_info_uncorrectable;

	/* FMConfigErrorInfo */
	rsp->fm_config_ei.status_and_code = dd->err_info_fmconfig;

	if (resp_len)
		*resp_len += response_data_size;

	return reply((struct ib_mad_hdr *)pmp);
}

static int pma_set_opa_portstatus(struct opa_pma_mad *pmp,
				  struct ib_device *ibdev,
				  u32 port, u32 *resp_len)
{
	struct opa_clear_port_status *req =
		(struct opa_clear_port_status *)pmp->data;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	u32 nports = be32_to_cpu(pmp->mad_hdr.attr_mod) >> 24;
	u64 portn = be64_to_cpu(req->port_select_mask[3]);
	u32 counter_select = be32_to_cpu(req->counter_select_mask);
	unsigned long vl_select_mask = VL_MASK_ALL; /* clear all per-vl cnts */
	unsigned long vl;

	if ((nports != 1) || (portn != 1 << port)) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}
	/*
	 * only counters returned by pma_get_opa_portstatus() are
	 * handled, so when pma_get_opa_portstatus() gets a fix,
	 * the corresponding change should be made here as well.
	 */

	if (counter_select & CS_PORT_XMIT_DATA)
		write_dev_cntr(dd, C_DC_XMIT_FLITS, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_RCV_DATA)
		write_dev_cntr(dd, C_DC_RCV_FLITS, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_XMIT_PKTS)
		write_dev_cntr(dd, C_DC_XMIT_PKTS, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_RCV_PKTS)
		write_dev_cntr(dd, C_DC_RCV_PKTS, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_MCAST_XMIT_PKTS)
		write_dev_cntr(dd, C_DC_MC_XMIT_PKTS, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_MCAST_RCV_PKTS)
		write_dev_cntr(dd, C_DC_MC_RCV_PKTS, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_XMIT_WAIT) {
		write_port_cntr(ppd, C_TX_WAIT, CNTR_INVALID_VL, 0);
		ppd->port_vl_xmit_wait_last[C_VL_COUNT] = 0;
		ppd->vl_xmit_flit_cnt[C_VL_COUNT] = 0;
	}
	/* ignore cs_sw_portCongestion for HFIs */

	if (counter_select & CS_PORT_RCV_FECN)
		write_dev_cntr(dd, C_DC_RCV_FCN, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_RCV_BECN)
		write_dev_cntr(dd, C_DC_RCV_BCN, CNTR_INVALID_VL, 0);

	/* ignore cs_port_xmit_time_cong for HFIs */
	/* ignore cs_port_xmit_wasted_bw for now */
	/* ignore cs_port_xmit_wait_data for now */
	if (counter_select & CS_PORT_RCV_BUBBLE)
		write_dev_cntr(dd, C_DC_RCV_BBL, CNTR_INVALID_VL, 0);

	/* Only applicable for switch */
	/* if (counter_select & CS_PORT_MARK_FECN)
	 *	write_csr(dd, DCC_PRF_PORT_MARK_FECN_CNT, 0);
	 */

	if (counter_select & CS_PORT_RCV_CONSTRAINT_ERRORS)
		write_port_cntr(ppd, C_SW_RCV_CSTR_ERR, CNTR_INVALID_VL, 0);

	/* ignore cs_port_rcv_switch_relay_errors for HFIs */
	if (counter_select & CS_PORT_XMIT_DISCARDS)
		write_port_cntr(ppd, C_SW_XMIT_DSCD, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_XMIT_CONSTRAINT_ERRORS)
		write_port_cntr(ppd, C_SW_XMIT_CSTR_ERR, CNTR_INVALID_VL, 0);

	if (counter_select & CS_PORT_RCV_REMOTE_PHYSICAL_ERRORS)
		write_dev_cntr(dd, C_DC_RMT_PHY_ERR, CNTR_INVALID_VL, 0);

	if (counter_select & CS_LOCAL_LINK_INTEGRITY_ERRORS)
		write_dev_cntr(dd, C_DC_RX_REPLAY, CNTR_INVALID_VL, 0);

	if (counter_select & CS_LINK_ERROR_RECOVERY) {
		write_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL, 0);
		write_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT,
			       CNTR_INVALID_VL, 0);
	}

	if (counter_select & CS_PORT_RCV_ERRORS)
		write_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL, 0);

	if (counter_select & CS_EXCESSIVE_BUFFER_OVERRUNS) {
		write_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL, 0);
		dd->rcv_ovfl_cnt = 0;
	}

	if (counter_select & CS_FM_CONFIG_ERRORS)
		write_dev_cntr(dd, C_DC_FM_CFG_ERR, CNTR_INVALID_VL, 0);

	if (counter_select & CS_LINK_DOWNED)
		write_port_cntr(ppd, C_SW_LINK_DOWN, CNTR_INVALID_VL, 0);

	if (counter_select & CS_UNCORRECTABLE_ERRORS)
		write_dev_cntr(dd, C_DC_UNC_ERR, CNTR_INVALID_VL, 0);

	for_each_set_bit(vl, &vl_select_mask, BITS_PER_LONG) {
		if (counter_select & CS_PORT_XMIT_DATA)
			write_port_cntr(ppd, C_TX_FLIT_VL, idx_from_vl(vl), 0);

		if (counter_select & CS_PORT_RCV_DATA)
			write_dev_cntr(dd, C_DC_RX_FLIT_VL, idx_from_vl(vl), 0);

		if (counter_select & CS_PORT_XMIT_PKTS)
			write_port_cntr(ppd, C_TX_PKT_VL, idx_from_vl(vl), 0);

		if (counter_select & CS_PORT_RCV_PKTS)
			write_dev_cntr(dd, C_DC_RX_PKT_VL, idx_from_vl(vl), 0);

		if (counter_select & CS_PORT_XMIT_WAIT) {
			write_port_cntr(ppd, C_TX_WAIT_VL, idx_from_vl(vl), 0);
			ppd->port_vl_xmit_wait_last[idx_from_vl(vl)] = 0;
			ppd->vl_xmit_flit_cnt[idx_from_vl(vl)] = 0;
		}

		/* sw_port_vl_congestion is 0 for HFIs */
		if (counter_select & CS_PORT_RCV_FECN)
			write_dev_cntr(dd, C_DC_RCV_FCN_VL, idx_from_vl(vl), 0);

		if (counter_select & CS_PORT_RCV_BECN)
			write_dev_cntr(dd, C_DC_RCV_BCN_VL, idx_from_vl(vl), 0);

		/* port_vl_xmit_time_cong is 0 for HFIs */
		/* port_vl_xmit_wasted_bw ??? */
		/* port_vl_xmit_wait_data - TXE (table 13-9 HFI spec) ??? */
		if (counter_select & CS_PORT_RCV_BUBBLE)
			write_dev_cntr(dd, C_DC_RCV_BBL_VL, idx_from_vl(vl), 0);

		/* if (counter_select & CS_PORT_MARK_FECN)
		 *     write_csr(dd, DCC_PRF_PORT_VL_MARK_FECN_CNT + offset, 0);
		 */
		if (counter_select & C_SW_XMIT_DSCD_VL)
			write_port_cntr(ppd, C_SW_XMIT_DSCD_VL,
					idx_from_vl(vl), 0);
	}

	if (resp_len)
		*resp_len += sizeof(*req);

	return reply((struct ib_mad_hdr *)pmp);
}

static int pma_set_opa_errorinfo(struct opa_pma_mad *pmp,
				 struct ib_device *ibdev,
				 u32 port, u32 *resp_len)
{
	struct _port_ei *rsp;
	struct opa_port_error_info_msg *req;
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	u64 port_mask;
	u32 num_ports;
	u32 port_num;
	u8 num_pslm;
	u32 error_info_select;

	req = (struct opa_port_error_info_msg *)pmp->data;
	rsp = &req->port[0];

	num_ports = OPA_AM_NPORT(be32_to_cpu(pmp->mad_hdr.attr_mod));
	num_pslm = hweight64(be64_to_cpu(req->port_select_mask[3]));

	memset(rsp, 0, sizeof(*rsp));

	if (num_ports != 1 || num_ports != num_pslm) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	/*
	 * The bit set in the mask needs to be consistent with the port
	 * the request came in on.
	 */
	port_mask = be64_to_cpu(req->port_select_mask[3]);
	port_num = find_first_bit((unsigned long *)&port_mask,
				  sizeof(port_mask) * 8);

	if (port_num != port) {
		pmp->mad_hdr.status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)pmp);
	}

	error_info_select = be32_to_cpu(req->error_info_select_mask);

	/* PortRcvErrorInfo */
	if (error_info_select & ES_PORT_RCV_ERROR_INFO)
		/* turn off status bit */
		dd->err_info_rcvport.status_and_code &= ~OPA_EI_STATUS_SMASK;

	/* ExcessiverBufferOverrunInfo */
	if (error_info_select & ES_EXCESSIVE_BUFFER_OVERRUN_INFO)
		/*
		 * status bit is essentially kept in the h/w - bit 5 of
		 * RCV_ERR_INFO
		 */
		write_csr(dd, RCV_ERR_INFO,
			  RCV_ERR_INFO_RCV_EXCESS_BUFFER_OVERRUN_SMASK);

	if (error_info_select & ES_PORT_XMIT_CONSTRAINT_ERROR_INFO)
		dd->err_info_xmit_constraint.status &= ~OPA_EI_STATUS_SMASK;

	if (error_info_select & ES_PORT_RCV_CONSTRAINT_ERROR_INFO)
		dd->err_info_rcv_constraint.status &= ~OPA_EI_STATUS_SMASK;

	/* UncorrectableErrorInfo */
	if (error_info_select & ES_UNCORRECTABLE_ERROR_INFO)
		/* turn off status bit */
		dd->err_info_uncorrectable &= ~OPA_EI_STATUS_SMASK;

	/* FMConfigErrorInfo */
	if (error_info_select & ES_FM_CONFIG_ERROR_INFO)
		/* turn off status bit */
		dd->err_info_fmconfig &= ~OPA_EI_STATUS_SMASK;

	if (resp_len)
		*resp_len += sizeof(*req);

	return reply((struct ib_mad_hdr *)pmp);
}

struct opa_congestion_info_attr {
	__be16 congestion_info;
	u8 control_table_cap;	/* Multiple of 64 entry unit CCTs */
	u8 congestion_log_length;
} __packed;

static int __subn_get_opa_cong_info(struct opa_smp *smp, u32 am, u8 *data,
				    struct ib_device *ibdev, u32 port,
				    u32 *resp_len, u32 max_len)
{
	struct opa_congestion_info_attr *p =
		(struct opa_congestion_info_attr *)data;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);

	if (smp_length_check(sizeof(*p), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	p->congestion_info = 0;
	p->control_table_cap = ppd->cc_max_table_entries;
	p->congestion_log_length = OPA_CONG_LOG_ELEMS;

	if (resp_len)
		*resp_len += sizeof(*p);

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_get_opa_cong_setting(struct opa_smp *smp, u32 am,
				       u8 *data, struct ib_device *ibdev,
				       u32 port, u32 *resp_len, u32 max_len)
{
	int i;
	struct opa_congestion_setting_attr *p =
		(struct opa_congestion_setting_attr *)data;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	struct opa_congestion_setting_entry_shadow *entries;
	struct cc_state *cc_state;

	if (smp_length_check(sizeof(*p), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	rcu_read_lock();

	cc_state = get_cc_state(ppd);

	if (!cc_state) {
		rcu_read_unlock();
		return reply((struct ib_mad_hdr *)smp);
	}

	entries = cc_state->cong_setting.entries;
	p->port_control = cpu_to_be16(cc_state->cong_setting.port_control);
	p->control_map = cpu_to_be32(cc_state->cong_setting.control_map);
	for (i = 0; i < OPA_MAX_SLS; i++) {
		p->entries[i].ccti_increase = entries[i].ccti_increase;
		p->entries[i].ccti_timer = cpu_to_be16(entries[i].ccti_timer);
		p->entries[i].trigger_threshold =
			entries[i].trigger_threshold;
		p->entries[i].ccti_min = entries[i].ccti_min;
	}

	rcu_read_unlock();

	if (resp_len)
		*resp_len += sizeof(*p);

	return reply((struct ib_mad_hdr *)smp);
}

/*
 * Apply congestion control information stored in the ppd to the
 * active structure.
 */
static void apply_cc_state(struct hfi1_pportdata *ppd)
{
	struct cc_state *old_cc_state, *new_cc_state;

	new_cc_state = kzalloc(sizeof(*new_cc_state), GFP_KERNEL);
	if (!new_cc_state)
		return;

	/*
	 * Hold the lock for updating *and* to prevent ppd information
	 * from changing during the update.
	 */
	spin_lock(&ppd->cc_state_lock);

	old_cc_state = get_cc_state_protected(ppd);
	if (!old_cc_state) {
		/* never active, or shutting down */
		spin_unlock(&ppd->cc_state_lock);
		kfree(new_cc_state);
		return;
	}

	*new_cc_state = *old_cc_state;

	if (ppd->total_cct_entry)
		new_cc_state->cct.ccti_limit = ppd->total_cct_entry - 1;
	else
		new_cc_state->cct.ccti_limit = 0;

	memcpy(new_cc_state->cct.entries, ppd->ccti_entries,
	       ppd->total_cct_entry * sizeof(struct ib_cc_table_entry));

	new_cc_state->cong_setting.port_control = IB_CC_CCS_PC_SL_BASED;
	new_cc_state->cong_setting.control_map = ppd->cc_sl_control_map;
	memcpy(new_cc_state->cong_setting.entries, ppd->congestion_entries,
	       OPA_MAX_SLS * sizeof(struct opa_congestion_setting_entry));

	rcu_assign_pointer(ppd->cc_state, new_cc_state);

	spin_unlock(&ppd->cc_state_lock);

	kfree_rcu(old_cc_state, rcu);
}

static int __subn_set_opa_cong_setting(struct opa_smp *smp, u32 am, u8 *data,
				       struct ib_device *ibdev, u32 port,
				       u32 *resp_len, u32 max_len)
{
	struct opa_congestion_setting_attr *p =
		(struct opa_congestion_setting_attr *)data;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	struct opa_congestion_setting_entry_shadow *entries;
	int i;

	if (smp_length_check(sizeof(*p), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	/*
	 * Save details from packet into the ppd.  Hold the cc_state_lock so
	 * our information is consistent with anyone trying to apply the state.
	 */
	spin_lock(&ppd->cc_state_lock);
	ppd->cc_sl_control_map = be32_to_cpu(p->control_map);

	entries = ppd->congestion_entries;
	for (i = 0; i < OPA_MAX_SLS; i++) {
		entries[i].ccti_increase = p->entries[i].ccti_increase;
		entries[i].ccti_timer = be16_to_cpu(p->entries[i].ccti_timer);
		entries[i].trigger_threshold =
			p->entries[i].trigger_threshold;
		entries[i].ccti_min = p->entries[i].ccti_min;
	}
	spin_unlock(&ppd->cc_state_lock);

	/* now apply the information */
	apply_cc_state(ppd);

	return __subn_get_opa_cong_setting(smp, am, data, ibdev, port,
					   resp_len, max_len);
}

static int __subn_get_opa_hfi1_cong_log(struct opa_smp *smp, u32 am,
					u8 *data, struct ib_device *ibdev,
					u32 port, u32 *resp_len, u32 max_len)
{
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	struct opa_hfi1_cong_log *cong_log = (struct opa_hfi1_cong_log *)data;
	u64 ts;
	int i;

	if (am || smp_length_check(sizeof(*cong_log), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	spin_lock_irq(&ppd->cc_log_lock);

	cong_log->log_type = OPA_CC_LOG_TYPE_HFI;
	cong_log->congestion_flags = 0;
	cong_log->threshold_event_counter =
		cpu_to_be16(ppd->threshold_event_counter);
	memcpy(cong_log->threshold_cong_event_map,
	       ppd->threshold_cong_event_map,
	       sizeof(cong_log->threshold_cong_event_map));
	/* keep timestamp in units of 1.024 usec */
	ts = ktime_get_ns() / 1024;
	cong_log->current_time_stamp = cpu_to_be32(ts);
	for (i = 0; i < OPA_CONG_LOG_ELEMS; i++) {
		struct opa_hfi1_cong_log_event_internal *cce =
			&ppd->cc_events[ppd->cc_mad_idx++];
		if (ppd->cc_mad_idx == OPA_CONG_LOG_ELEMS)
			ppd->cc_mad_idx = 0;
		/*
		 * Entries which are older than twice the time
		 * required to wrap the counter are supposed to
		 * be zeroed (CA10-49 IBTA, release 1.2.1, V1).
		 */
		if ((ts - cce->timestamp) / 2 > U32_MAX)
			continue;
		memcpy(cong_log->events[i].local_qp_cn_entry, &cce->lqpn, 3);
		memcpy(cong_log->events[i].remote_qp_number_cn_entry,
		       &cce->rqpn, 3);
		cong_log->events[i].sl_svc_type_cn_entry =
			((cce->sl & 0x1f) << 3) | (cce->svc_type & 0x7);
		cong_log->events[i].remote_lid_cn_entry =
			cpu_to_be32(cce->rlid);
		cong_log->events[i].timestamp_cn_entry =
			cpu_to_be32(cce->timestamp);
	}

	/*
	 * Reset threshold_cong_event_map, and threshold_event_counter
	 * to 0 when log is read.
	 */
	memset(ppd->threshold_cong_event_map, 0x0,
	       sizeof(ppd->threshold_cong_event_map));
	ppd->threshold_event_counter = 0;

	spin_unlock_irq(&ppd->cc_log_lock);

	if (resp_len)
		*resp_len += sizeof(struct opa_hfi1_cong_log);

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_get_opa_cc_table(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct ib_cc_table_attr *cc_table_attr =
		(struct ib_cc_table_attr *)data;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	u32 start_block = OPA_AM_START_BLK(am);
	u32 n_blocks = OPA_AM_NBLK(am);
	struct ib_cc_table_entry_shadow *entries;
	int i, j;
	u32 sentry, eentry;
	struct cc_state *cc_state;
	u32 size = sizeof(u16) * (IB_CCT_ENTRIES * n_blocks + 1);

	/* sanity check n_blocks, start_block */
	if (n_blocks == 0 || smp_length_check(size, max_len) ||
	    start_block + n_blocks > ppd->cc_max_table_entries) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	rcu_read_lock();

	cc_state = get_cc_state(ppd);

	if (!cc_state) {
		rcu_read_unlock();
		return reply((struct ib_mad_hdr *)smp);
	}

	sentry = start_block * IB_CCT_ENTRIES;
	eentry = sentry + (IB_CCT_ENTRIES * n_blocks);

	cc_table_attr->ccti_limit = cpu_to_be16(cc_state->cct.ccti_limit);

	entries = cc_state->cct.entries;

	/* return n_blocks, though the last block may not be full */
	for (j = 0, i = sentry; i < eentry; j++, i++)
		cc_table_attr->ccti_entries[j].entry =
			cpu_to_be16(entries[i].entry);

	rcu_read_unlock();

	if (resp_len)
		*resp_len += size;

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_cc_table(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct ib_cc_table_attr *p = (struct ib_cc_table_attr *)data;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	u32 start_block = OPA_AM_START_BLK(am);
	u32 n_blocks = OPA_AM_NBLK(am);
	struct ib_cc_table_entry_shadow *entries;
	int i, j;
	u32 sentry, eentry;
	u16 ccti_limit;
	u32 size = sizeof(u16) * (IB_CCT_ENTRIES * n_blocks + 1);

	/* sanity check n_blocks, start_block */
	if (n_blocks == 0 || smp_length_check(size, max_len) ||
	    start_block + n_blocks > ppd->cc_max_table_entries) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	sentry = start_block * IB_CCT_ENTRIES;
	eentry = sentry + ((n_blocks - 1) * IB_CCT_ENTRIES) +
		 (be16_to_cpu(p->ccti_limit)) % IB_CCT_ENTRIES + 1;

	/* sanity check ccti_limit */
	ccti_limit = be16_to_cpu(p->ccti_limit);
	if (ccti_limit + 1 > eentry) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	/*
	 * Save details from packet into the ppd.  Hold the cc_state_lock so
	 * our information is consistent with anyone trying to apply the state.
	 */
	spin_lock(&ppd->cc_state_lock);
	ppd->total_cct_entry = ccti_limit + 1;
	entries = ppd->ccti_entries;
	for (j = 0, i = sentry; i < eentry; j++, i++)
		entries[i].entry = be16_to_cpu(p->ccti_entries[j].entry);
	spin_unlock(&ppd->cc_state_lock);

	/* now apply the information */
	apply_cc_state(ppd);

	return __subn_get_opa_cc_table(smp, am, data, ibdev, port, resp_len,
				       max_len);
}

struct opa_led_info {
	__be32 rsvd_led_mask;
	__be32 rsvd;
};

#define OPA_LED_SHIFT	31
#define OPA_LED_MASK	BIT(OPA_LED_SHIFT)

static int __subn_get_opa_led_info(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct hfi1_pportdata *ppd = dd->pport;
	struct opa_led_info *p = (struct opa_led_info *)data;
	u32 nport = OPA_AM_NPORT(am);
	u32 is_beaconing_active;

	if (nport != 1 || smp_length_check(sizeof(*p), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	/*
	 * This pairs with the memory barrier in hfi1_start_led_override to
	 * ensure that we read the correct state of LED beaconing represented
	 * by led_override_timer_active
	 */
	smp_rmb();
	is_beaconing_active = !!atomic_read(&ppd->led_override_timer_active);
	p->rsvd_led_mask = cpu_to_be32(is_beaconing_active << OPA_LED_SHIFT);

	if (resp_len)
		*resp_len += sizeof(struct opa_led_info);

	return reply((struct ib_mad_hdr *)smp);
}

static int __subn_set_opa_led_info(struct opa_smp *smp, u32 am, u8 *data,
				   struct ib_device *ibdev, u32 port,
				   u32 *resp_len, u32 max_len)
{
	struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
	struct opa_led_info *p = (struct opa_led_info *)data;
	u32 nport = OPA_AM_NPORT(am);
	int on = !!(be32_to_cpu(p->rsvd_led_mask) & OPA_LED_MASK);

	if (nport != 1 || smp_length_check(sizeof(*p), max_len)) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	if (on)
		hfi1_start_led_override(dd->pport, 2000, 1500);
	else
		shutdown_led_override(dd->pport);

	return __subn_get_opa_led_info(smp, am, data, ibdev, port, resp_len,
				       max_len);
}

static int subn_get_opa_sma(__be16 attr_id, struct opa_smp *smp, u32 am,
			    u8 *data, struct ib_device *ibdev, u32 port,
			    u32 *resp_len, u32 max_len)
{
	int ret;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);

	switch (attr_id) {
	case IB_SMP_ATTR_NODE_DESC:
		ret = __subn_get_opa_nodedesc(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case IB_SMP_ATTR_NODE_INFO:
		ret = __subn_get_opa_nodeinfo(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case IB_SMP_ATTR_PORT_INFO:
		ret = __subn_get_opa_portinfo(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case IB_SMP_ATTR_PKEY_TABLE:
		ret = __subn_get_opa_pkeytable(smp, am, data, ibdev, port,
					       resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_SL_TO_SC_MAP:
		ret = __subn_get_opa_sl_to_sc(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_SC_TO_SL_MAP:
		ret = __subn_get_opa_sc_to_sl(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_SC_TO_VLT_MAP:
		ret = __subn_get_opa_sc_to_vlt(smp, am, data, ibdev, port,
					       resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_SC_TO_VLNT_MAP:
		ret = __subn_get_opa_sc_to_vlnt(smp, am, data, ibdev, port,
						resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_PORT_STATE_INFO:
		ret = __subn_get_opa_psi(smp, am, data, ibdev, port,
					 resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_BUFFER_CONTROL_TABLE:
		ret = __subn_get_opa_bct(smp, am, data, ibdev, port,
					 resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_CABLE_INFO:
		ret = __subn_get_opa_cable_info(smp, am, data, ibdev, port,
						resp_len, max_len);
		break;
	case IB_SMP_ATTR_VL_ARB_TABLE:
		ret = __subn_get_opa_vl_arb(smp, am, data, ibdev, port,
					    resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_CONGESTION_INFO:
		ret = __subn_get_opa_cong_info(smp, am, data, ibdev, port,
					       resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_HFI_CONGESTION_SETTING:
		ret = __subn_get_opa_cong_setting(smp, am, data, ibdev,
						  port, resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_HFI_CONGESTION_LOG:
		ret = __subn_get_opa_hfi1_cong_log(smp, am, data, ibdev,
						   port, resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_CONGESTION_CONTROL_TABLE:
		ret = __subn_get_opa_cc_table(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case IB_SMP_ATTR_LED_INFO:
		ret = __subn_get_opa_led_info(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case IB_SMP_ATTR_SM_INFO:
		if (ibp->rvp.port_cap_flags & IB_PORT_SM_DISABLED)
			return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
		if (ibp->rvp.port_cap_flags & IB_PORT_SM)
			return IB_MAD_RESULT_SUCCESS;
		fallthrough;
	default:
		smp->status |= IB_SMP_UNSUP_METH_ATTR;
		ret = reply((struct ib_mad_hdr *)smp);
		break;
	}
	return ret;
}

static int subn_set_opa_sma(__be16 attr_id, struct opa_smp *smp, u32 am,
			    u8 *data, struct ib_device *ibdev, u32 port,
			    u32 *resp_len, u32 max_len, int local_mad)
{
	int ret;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);

	switch (attr_id) {
	case IB_SMP_ATTR_PORT_INFO:
		ret = __subn_set_opa_portinfo(smp, am, data, ibdev, port,
					      resp_len, max_len, local_mad);
		break;
	case IB_SMP_ATTR_PKEY_TABLE:
		ret = __subn_set_opa_pkeytable(smp, am, data, ibdev, port,
					       resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_SL_TO_SC_MAP:
		ret = __subn_set_opa_sl_to_sc(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_SC_TO_SL_MAP:
		ret = __subn_set_opa_sc_to_sl(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_SC_TO_VLT_MAP:
		ret = __subn_set_opa_sc_to_vlt(smp, am, data, ibdev, port,
					       resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_SC_TO_VLNT_MAP:
		ret = __subn_set_opa_sc_to_vlnt(smp, am, data, ibdev, port,
						resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_PORT_STATE_INFO:
		ret = __subn_set_opa_psi(smp, am, data, ibdev, port,
					 resp_len, max_len, local_mad);
		break;
	case OPA_ATTRIB_ID_BUFFER_CONTROL_TABLE:
		ret = __subn_set_opa_bct(smp, am, data, ibdev, port,
					 resp_len, max_len);
		break;
	case IB_SMP_ATTR_VL_ARB_TABLE:
		ret = __subn_set_opa_vl_arb(smp, am, data, ibdev, port,
					    resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_HFI_CONGESTION_SETTING:
		ret = __subn_set_opa_cong_setting(smp, am, data, ibdev,
						  port, resp_len, max_len);
		break;
	case OPA_ATTRIB_ID_CONGESTION_CONTROL_TABLE:
		ret = __subn_set_opa_cc_table(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case IB_SMP_ATTR_LED_INFO:
		ret = __subn_set_opa_led_info(smp, am, data, ibdev, port,
					      resp_len, max_len);
		break;
	case IB_SMP_ATTR_SM_INFO:
		if (ibp->rvp.port_cap_flags & IB_PORT_SM_DISABLED)
			return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
		if (ibp->rvp.port_cap_flags & IB_PORT_SM)
			return IB_MAD_RESULT_SUCCESS;
		fallthrough;
	default:
		smp->status |= IB_SMP_UNSUP_METH_ATTR;
		ret = reply((struct ib_mad_hdr *)smp);
		break;
	}
	return ret;
}

static inline void set_aggr_error(struct opa_aggregate *ag)
{
	ag->err_reqlength |= cpu_to_be16(0x8000);
}

static int subn_get_opa_aggregate(struct opa_smp *smp,
				  struct ib_device *ibdev, u32 port,
				  u32 *resp_len)
{
	int i;
	u32 num_attr = be32_to_cpu(smp->attr_mod) & 0x000000ff;
	u8 *next_smp = opa_get_smp_data(smp);

	if (num_attr < 1 || num_attr > 117) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	for (i = 0; i < num_attr; i++) {
		struct opa_aggregate *agg;
		size_t agg_data_len;
		size_t agg_size;
		u32 am;

		agg = (struct opa_aggregate *)next_smp;
		agg_data_len = (be16_to_cpu(agg->err_reqlength) & 0x007f) * 8;
		agg_size = sizeof(*agg) + agg_data_len;
		am = be32_to_cpu(agg->attr_mod);

		*resp_len += agg_size;

		if (next_smp + agg_size > ((u8 *)smp) + sizeof(*smp)) {
			smp->status |= IB_SMP_INVALID_FIELD;
			return reply((struct ib_mad_hdr *)smp);
		}

		/* zero the payload for this segment */
		memset(next_smp + sizeof(*agg), 0, agg_data_len);

		(void)subn_get_opa_sma(agg->attr_id, smp, am, agg->data,
				       ibdev, port, NULL, (u32)agg_data_len);

		if (smp->status & IB_SMP_INVALID_FIELD)
			break;
		if (smp->status & ~IB_SMP_DIRECTION) {
			set_aggr_error(agg);
			return reply((struct ib_mad_hdr *)smp);
		}
		next_smp += agg_size;
	}

	return reply((struct ib_mad_hdr *)smp);
}

static int subn_set_opa_aggregate(struct opa_smp *smp,
				  struct ib_device *ibdev, u32 port,
				  u32 *resp_len, int local_mad)
{
	int i;
	u32 num_attr = be32_to_cpu(smp->attr_mod) & 0x000000ff;
	u8 *next_smp = opa_get_smp_data(smp);

	if (num_attr < 1 || num_attr > 117) {
		smp->status |= IB_SMP_INVALID_FIELD;
		return reply((struct ib_mad_hdr *)smp);
	}

	for (i = 0; i < num_attr; i++) {
		struct opa_aggregate *agg;
		size_t agg_data_len;
		size_t agg_size;
		u32 am;

		agg = (struct opa_aggregate *)next_smp;
		agg_data_len = (be16_to_cpu(agg->err_reqlength) & 0x007f) * 8;
		agg_size = sizeof(*agg) + agg_data_len;
		am = be32_to_cpu(agg->attr_mod);

		*resp_len += agg_size;

		if (next_smp + agg_size > ((u8 *)smp) + sizeof(*smp)) {
			smp->status |= IB_SMP_INVALID_FIELD;
			return reply((struct ib_mad_hdr *)smp);
		}

		(void)subn_set_opa_sma(agg->attr_id, smp, am, agg->data,
				       ibdev, port, NULL, (u32)agg_data_len,
				       local_mad);

		if (smp->status & IB_SMP_INVALID_FIELD)
			break;
		if (smp->status & ~IB_SMP_DIRECTION) {
			set_aggr_error(agg);
			return reply((struct ib_mad_hdr *)smp);
		}
		next_smp += agg_size;
	}

	return reply((struct ib_mad_hdr *)smp);
}

/*
 * OPAv1 specifies that, on the transition to link up, these counters
 * are cleared:
 *   PortRcvErrors [*]
 *   LinkErrorRecovery
 *   LocalLinkIntegrityErrors
 *   ExcessiveBufferOverruns [*]
 *
 * [*] Error info associated with these counters is retained, but the
 * error info status is reset to 0.
 */
void clear_linkup_counters(struct hfi1_devdata *dd)
{
	/* PortRcvErrors */
	write_dev_cntr(dd, C_DC_RCV_ERR, CNTR_INVALID_VL, 0);
	dd->err_info_rcvport.status_and_code &= ~OPA_EI_STATUS_SMASK;
	/* LinkErrorRecovery */
	write_dev_cntr(dd, C_DC_SEQ_CRC_CNT, CNTR_INVALID_VL, 0);
	write_dev_cntr(dd, C_DC_REINIT_FROM_PEER_CNT, CNTR_INVALID_VL, 0);
	/* LocalLinkIntegrityErrors */
	write_dev_cntr(dd, C_DC_RX_REPLAY, CNTR_INVALID_VL, 0);
	/* ExcessiveBufferOverruns */
	write_dev_cntr(dd, C_RCV_OVF, CNTR_INVALID_VL, 0);
	dd->rcv_ovfl_cnt = 0;
	dd->err_info_xmit_constraint.status &= ~OPA_EI_STATUS_SMASK;
}

static int is_full_mgmt_pkey_in_table(struct hfi1_ibport *ibp)
{
	unsigned int i;
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);

	for (i = 0; i < ARRAY_SIZE(ppd->pkeys); ++i)
		if (ppd->pkeys[i] == FULL_MGMT_P_KEY)
			return 1;

	return 0;
}

/*
 * is_local_mad() returns 1 if 'mad' is sent from, and destined to the
 * local node, 0 otherwise.
 */
static int is_local_mad(struct hfi1_ibport *ibp, const struct opa_mad *mad,
			const struct ib_wc *in_wc)
{
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	const struct opa_smp *smp = (const struct opa_smp *)mad;

	if (smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
		return (smp->hop_cnt == 0 &&
			smp->route.dr.dr_slid == OPA_LID_PERMISSIVE &&
			smp->route.dr.dr_dlid == OPA_LID_PERMISSIVE);
	}

	return (in_wc->slid == ppd->lid);
}

/*
 * opa_local_smp_check() should only be called on MADs for which
 * is_local_mad() returns true. It applies the SMP checks that are
 * specific to SMPs which are sent from, and destined to this node.
 * opa_local_smp_check() returns 0 if the SMP passes its checks, 1
 * otherwise.
 *
 * SMPs which arrive from other nodes are instead checked by
 * opa_smp_check().
 */
static int opa_local_smp_check(struct hfi1_ibport *ibp,
			       const struct ib_wc *in_wc)
{
	struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
	u16 pkey;

	if (in_wc->pkey_index >= ARRAY_SIZE(ppd->pkeys))
		return 1;

	pkey = ppd->pkeys[in_wc->pkey_index];
	/*
	 * We need to do the "node-local" checks specified in OPAv1,
	 * rev 0.90, section 9.10.26, which are:
	 *   - pkey is 0x7fff, or 0xffff
	 *   - Source QPN == 0 || Destination QPN == 0
	 *   - the MAD header's management class is either
	 *     IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE or
	 *     IB_MGMT_CLASS_SUBN_LID_ROUTED
	 *   - SLID != 0
	 *
	 * However, we know (and so don't need to check again) that,
	 * for local SMPs, the MAD stack passes MADs with:
	 *   - Source QPN of 0
	 *   - MAD mgmt_class is IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
	 *   - SLID is either: OPA_LID_PERMISSIVE (0xFFFFFFFF), or
	 *     our own port's lid
	 *
	 */
	if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY)
		return 0;
	ingress_pkey_table_fail(ppd, pkey, in_wc->slid);
	return 1;
}

/**
 * hfi1_pkey_validation_pma - It validates PKEYs for incoming PMA MAD packets.
 * @ibp: IB port data
 * @in_mad: MAD packet with header and data
 * @in_wc: Work completion data such as source LID, port number, etc.
 *
 * These are all the possible logic rules for validating a pkey:
 *
 * a) If pkey neither FULL_MGMT_P_KEY nor LIM_MGMT_P_KEY,
 *    and NOT self-originated packet:
 *     Drop MAD packet as it should always be part of the
 *     management partition unless it's a self-originated packet.
 *
 * b) If pkey_index -> FULL_MGMT_P_KEY, and LIM_MGMT_P_KEY in pkey table:
 *     The packet is coming from a management node and the receiving node
 *     is also a management node, so it is safe for the packet to go through.
 *
 * c) If pkey_index -> FULL_MGMT_P_KEY, and LIM_MGMT_P_KEY is NOT in pkey table:
 *     Drop the packet as LIM_MGMT_P_KEY should always be in the pkey table.
 *     It could be an FM misconfiguration.
 *
 * d) If pkey_index -> LIM_MGMT_P_KEY and FULL_MGMT_P_KEY is NOT in pkey table:
 *     It is safe for the packet to go through since a non-management node is
 *     talking to another non-management node.
 *
 * e) If pkey_index -> LIM_MGMT_P_KEY and FULL_MGMT_P_KEY in pkey table:
 *     Drop the packet because a non-management node is talking to a
 *     management node, and it could be an attack.
 *
 * For the implementation, these rules can be simplied to only checking
 * for (a) and (e). There's no need to check for rule (b) as
 * the packet doesn't need to be dropped. Rule (c) is not possible in
 * the driver as LIM_MGMT_P_KEY is always in the pkey table.
 *
 * Return:
 * 0 - pkey is okay, -EINVAL it's a bad pkey
 */
static int hfi1_pkey_validation_pma(struct hfi1_ibport *ibp,
				    const struct opa_mad *in_mad,
				    const struct ib_wc *in_wc)
{
	u16 pkey_value = hfi1_lookup_pkey_value(ibp, in_wc->pkey_index);

	/* Rule (a) from above */
	if (!is_local_mad(ibp, in_mad, in_wc) &&
	    pkey_value != LIM_MGMT_P_KEY &&
	    pkey_value != FULL_MGMT_P_KEY)
		return -EINVAL;

	/* Rule (e) from above */
	if (pkey_value == LIM_MGMT_P_KEY &&
	    is_full_mgmt_pkey_in_table(ibp))
		return -EINVAL;

	return 0;
}

static int process_subn_opa(struct ib_device *ibdev, int mad_flags,
			    u32 port, const struct opa_mad *in_mad,
			    struct opa_mad *out_mad,
			    u32 *resp_len, int local_mad)
{
	struct opa_smp *smp = (struct opa_smp *)out_mad;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	u8 *data;
	u32 am, data_size;
	__be16 attr_id;
	int ret;

	*out_mad = *in_mad;
	data = opa_get_smp_data(smp);
	data_size = (u32)opa_get_smp_data_size(smp);

	am = be32_to_cpu(smp->attr_mod);
	attr_id = smp->attr_id;
	if (smp->class_version != OPA_SM_CLASS_VERSION) {
		smp->status |= IB_SMP_UNSUP_VERSION;
		ret = reply((struct ib_mad_hdr *)smp);
		return ret;
	}
	ret = check_mkey(ibp, (struct ib_mad_hdr *)smp, mad_flags, smp->mkey,
			 smp->route.dr.dr_slid, smp->route.dr.return_path,
			 smp->hop_cnt);
	if (ret) {
		u32 port_num = be32_to_cpu(smp->attr_mod);

		/*
		 * If this is a get/set portinfo, we already check the
		 * M_Key if the MAD is for another port and the M_Key
		 * is OK on the receiving port. This check is needed
		 * to increment the error counters when the M_Key
		 * fails to match on *both* ports.
		 */
		if (attr_id == IB_SMP_ATTR_PORT_INFO &&
		    (smp->method == IB_MGMT_METHOD_GET ||
		     smp->method == IB_MGMT_METHOD_SET) &&
		    port_num && port_num <= ibdev->phys_port_cnt &&
		    port != port_num)
			(void)check_mkey(to_iport(ibdev, port_num),
					  (struct ib_mad_hdr *)smp, 0,
					  smp->mkey, smp->route.dr.dr_slid,
					  smp->route.dr.return_path,
					  smp->hop_cnt);
		ret = IB_MAD_RESULT_FAILURE;
		return ret;
	}

	*resp_len = opa_get_smp_header_size(smp);

	switch (smp->method) {
	case IB_MGMT_METHOD_GET:
		switch (attr_id) {
		default:
			clear_opa_smp_data(smp);
			ret = subn_get_opa_sma(attr_id, smp, am, data,
					       ibdev, port, resp_len,
					       data_size);
			break;
		case OPA_ATTRIB_ID_AGGREGATE:
			ret = subn_get_opa_aggregate(smp, ibdev, port,
						     resp_len);
			break;
		}
		break;
	case IB_MGMT_METHOD_SET:
		switch (attr_id) {
		default:
			ret = subn_set_opa_sma(attr_id, smp, am, data,
					       ibdev, port, resp_len,
					       data_size, local_mad);
			break;
		case OPA_ATTRIB_ID_AGGREGATE:
			ret = subn_set_opa_aggregate(smp, ibdev, port,
						     resp_len, local_mad);
			break;
		}
		break;
	case IB_MGMT_METHOD_TRAP:
	case IB_MGMT_METHOD_REPORT:
	case IB_MGMT_METHOD_REPORT_RESP:
	case IB_MGMT_METHOD_GET_RESP:
		/*
		 * The ib_mad module will call us to process responses
		 * before checking for other consumers.
		 * Just tell the caller to process it normally.
		 */
		ret = IB_MAD_RESULT_SUCCESS;
		break;
	case IB_MGMT_METHOD_TRAP_REPRESS:
		subn_handle_opa_trap_repress(ibp, smp);
		/* Always successful */
		ret = IB_MAD_RESULT_SUCCESS;
		break;
	default:
		smp->status |= IB_SMP_UNSUP_METHOD;
		ret = reply((struct ib_mad_hdr *)smp);
		break;
	}

	return ret;
}

static int process_subn(struct ib_device *ibdev, int mad_flags,
			u32 port, const struct ib_mad *in_mad,
			struct ib_mad *out_mad)
{
	struct ib_smp *smp = (struct ib_smp *)out_mad;
	struct hfi1_ibport *ibp = to_iport(ibdev, port);
	int ret;

	*out_mad = *in_mad;
	if (smp->class_version != 1) {
		smp->status |= IB_SMP_UNSUP_VERSION;
		ret = reply((struct ib_mad_hdr *)smp);
		return ret;
	}

	ret = check_mkey(ibp, (struct ib_mad_hdr *)smp, mad_flags,
			 smp->mkey, (__force __be32)smp->dr_slid,
			 smp->return_path, smp->hop_cnt);
	if (ret) {
		u32 port_num = be32_to_cpu(smp->attr_mod);

		/*
		 * If this is a get/set portinfo, we already check the
		 * M_Key if the MAD is for another port and the M_Key
		 * is OK on the receiving port. This check is needed
		 * to increment the error counters when the M_Key
		 * fails to match on *both* ports.
		 */
		if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
		    (smp->method == IB_MGMT_METHOD_GET ||
		     smp->method == IB_MGMT_METHOD_SET) &&
		    port_num && port_num <= ibdev->phys_port_cnt &&
		    port != port_num)
			(void)check_mkey(to_iport(ibdev, port_num),
					 (struct ib_mad_hdr *)smp, 0,
					 smp->mkey,
					 (__force __be32)smp->dr_slid,
					 smp->return_path, smp->hop_cnt);
		ret = IB_MAD_RESULT_FAILURE;
		return ret;
	}

	switch (smp->method) {
	case IB_MGMT_METHOD_GET:
		switch (smp->attr_id) {
		case IB_SMP_ATTR_NODE_INFO:
			ret = subn_get_nodeinfo(smp, ibdev, port);
			break;
		default:
			smp->status |= IB_SMP_UNSUP_METH_ATTR;
			ret = reply((struct ib_mad_hdr *)smp);
			break;
		}
		break;
	}

	return ret;
}

static int process_perf(struct ib_device *ibdev, u32 port,
			const struct ib_mad *in_mad,
			struct ib_mad *out_mad)
{
	struct ib_pma_mad *pmp = (struct ib_pma_mad *)out_mad;
	struct ib_class_port_info *cpi = (struct ib_class_port_info *)
						&pmp->data;
	int ret = IB_MAD_RESULT_FAILURE;

	*out_mad = *in_mad;
	if (pmp->mad_hdr.class_version != 1) {
		pmp->mad_hdr.status |= IB_SMP_UNSUP_VERSION;
		ret = reply((struct ib_mad_hdr *)pmp);
		return ret;
	}

	switch (pmp->mad_hdr.method) {
	case IB_MGMT_METHOD_GET:
		switch (pmp->mad_hdr.attr_id) {
		case IB_PMA_PORT_COUNTERS:
			ret = pma_get_ib_portcounters(pmp, ibdev, port);
			break;
		case IB_PMA_PORT_COUNTERS_EXT:
			ret = pma_get_ib_portcounters_ext(pmp, ibdev, port);
			break;
		case IB_PMA_CLASS_PORT_INFO:
			cpi->capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
			ret = reply((struct ib_mad_hdr *)pmp);
			break;
		default:
			pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
			ret = reply((struct ib_mad_hdr *)pmp);
			break;
		}
		break;

	case IB_MGMT_METHOD_SET:
		if (pmp->mad_hdr.attr_id) {
			pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
			ret = reply((struct ib_mad_hdr *)pmp);
		}
		break;

	case IB_MGMT_METHOD_TRAP:
	case IB_MGMT_METHOD_GET_RESP:
		/*
		 * The ib_mad module will call us to process responses
		 * before checking for other consumers.
		 * Just tell the caller to process it normally.
		 */
		ret = IB_MAD_RESULT_SUCCESS;
		break;

	default:
		pmp->mad_hdr.status |= IB_SMP_UNSUP_METHOD;
		ret = reply((struct ib_mad_hdr *)pmp);
		break;
	}

	return ret;
}

static int process_perf_opa(struct ib_device *ibdev, u32 port,
			    const struct opa_mad *in_mad,
			    struct opa_mad *out_mad, u32 *resp_len)
{
	struct opa_pma_mad *pmp = (struct opa_pma_mad *)out_mad;
	int ret;

	*out_mad = *in_mad;

	if (pmp->mad_hdr.class_version != OPA_SM_CLASS_VERSION) {
		pmp->mad_hdr.status |= IB_SMP_UNSUP_VERSION;
		return reply((struct ib_mad_hdr *)pmp);
	}

	*resp_len = sizeof(pmp->mad_hdr);

	switch (pmp->mad_hdr.method) {
	case IB_MGMT_METHOD_GET:
		switch (pmp->mad_hdr.attr_id) {
		case IB_PMA_CLASS_PORT_INFO:
			ret = pma_get_opa_classportinfo(pmp, ibdev, resp_len);
			break;
		case OPA_PM_ATTRIB_ID_PORT_STATUS:
			ret = pma_get_opa_portstatus(pmp, ibdev, port,
						     resp_len);
			break;
		case OPA_PM_ATTRIB_ID_DATA_PORT_COUNTERS:
			ret = pma_get_opa_datacounters(pmp, ibdev, port,
						       resp_len);
			break;
		case OPA_PM_ATTRIB_ID_ERROR_PORT_COUNTERS:
			ret = pma_get_opa_porterrors(pmp, ibdev, port,
						     resp_len);
			break;
		case OPA_PM_ATTRIB_ID_ERROR_INFO:
			ret = pma_get_opa_errorinfo(pmp, ibdev, port,
						    resp_len);
			break;
		default:
			pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
			ret = reply((struct ib_mad_hdr *)pmp);
			break;
		}
		break;

	case IB_MGMT_METHOD_SET:
		switch (pmp->mad_hdr.attr_id) {
		case OPA_PM_ATTRIB_ID_CLEAR_PORT_STATUS:
			ret = pma_set_opa_portstatus(pmp, ibdev, port,
						     resp_len);
			break;
		case OPA_PM_ATTRIB_ID_ERROR_INFO:
			ret = pma_set_opa_errorinfo(pmp, ibdev, port,
						    resp_len);
			break;
		default:
			pmp->mad_hdr.status |= IB_SMP_UNSUP_METH_ATTR;
			ret = reply((struct ib_mad_hdr *)pmp);
			break;
		}
		break;

	case IB_MGMT_METHOD_TRAP:
	case IB_MGMT_METHOD_GET_RESP:
		/*
		 * The ib_mad module will call us to process responses
		 * before checking for other consumers.
		 * Just tell the caller to process it normally.
		 */
		ret = IB_MAD_RESULT_SUCCESS;
		break;

	default:
		pmp->mad_hdr.status |= IB_SMP_UNSUP_METHOD;
		ret = reply((struct ib_mad_hdr *)pmp);
		break;
	}

	return ret;
}

static int hfi1_process_opa_mad(struct ib_device *ibdev, int mad_flags,
				u32 port, const struct ib_wc *in_wc,
				const struct ib_grh *in_grh,
				const struct opa_mad *in_mad,
				struct opa_mad *out_mad, size_t *out_mad_size,
				u16 *out_mad_pkey_index)
{
	int ret;
	int pkey_idx;
	int local_mad = 0;
	u32 resp_len = in_wc->byte_len - sizeof(*in_grh);
	struct hfi1_ibport *ibp = to_iport(ibdev, port);

	pkey_idx = hfi1_lookup_pkey_idx(ibp, LIM_MGMT_P_KEY);
	if (pkey_idx < 0) {
		pr_warn("failed to find limited mgmt pkey, defaulting 0x%x\n",
			hfi1_get_pkey(ibp, 1));
		pkey_idx = 1;
	}
	*out_mad_pkey_index = (u16)pkey_idx;

	switch (in_mad->mad_hdr.mgmt_class) {
	case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
	case IB_MGMT_CLASS_SUBN_LID_ROUTED:
		local_mad = is_local_mad(ibp, in_mad, in_wc);
		if (local_mad) {
			ret = opa_local_smp_check(ibp, in_wc);
			if (ret)
				return IB_MAD_RESULT_FAILURE;
		}
		ret = process_subn_opa(ibdev, mad_flags, port, in_mad,
				       out_mad, &resp_len, local_mad);
		goto bail;
	case IB_MGMT_CLASS_PERF_MGMT:
		ret = hfi1_pkey_validation_pma(ibp, in_mad, in_wc);
		if (ret)
			return IB_MAD_RESULT_FAILURE;

		ret = process_perf_opa(ibdev, port, in_mad, out_mad, &resp_len);
		goto bail;

	default:
		ret = IB_MAD_RESULT_SUCCESS;
	}

bail:
	if (ret & IB_MAD_RESULT_REPLY)
		*out_mad_size = round_up(resp_len, 8);
	else if (ret & IB_MAD_RESULT_SUCCESS)
		*out_mad_size = in_wc->byte_len - sizeof(struct ib_grh);

	return ret;
}

static int hfi1_process_ib_mad(struct ib_device *ibdev, int mad_flags, u32 port,
			       const struct ib_wc *in_wc,
			       const struct ib_grh *in_grh,
			       const struct ib_mad *in_mad,
			       struct ib_mad *out_mad)
{
	int ret;

	switch (in_mad->mad_hdr.mgmt_class) {
	case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
	case IB_MGMT_CLASS_SUBN_LID_ROUTED:
		ret = process_subn(ibdev, mad_flags, port, in_mad, out_mad);
		break;
	case IB_MGMT_CLASS_PERF_MGMT:
		ret = process_perf(ibdev, port, in_mad, out_mad);
		break;
	default:
		ret = IB_MAD_RESULT_SUCCESS;
		break;
	}

	return ret;
}

/**
 * hfi1_process_mad - process an incoming MAD packet
 * @ibdev: the infiniband device this packet came in on
 * @mad_flags: MAD flags
 * @port: the port number this packet came in on
 * @in_wc: the work completion entry for this packet
 * @in_grh: the global route header for this packet
 * @in_mad: the incoming MAD
 * @out_mad: any outgoing MAD reply
 * @out_mad_size: size of the outgoing MAD reply
 * @out_mad_pkey_index: used to apss back the packet key index
 *
 * Returns IB_MAD_RESULT_SUCCESS if this is a MAD that we are not
 * interested in processing.
 *
 * Note that the verbs framework has already done the MAD sanity checks,
 * and hop count/pointer updating for IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE
 * MADs.
 *
 * This is called by the ib_mad module.
 */
int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u32 port,
		     const struct ib_wc *in_wc, const struct ib_grh *in_grh,
		     const struct ib_mad *in_mad, struct ib_mad *out_mad,
		     size_t *out_mad_size, u16 *out_mad_pkey_index)
{
	switch (in_mad->mad_hdr.base_version) {
	case OPA_MGMT_BASE_VERSION:
		return hfi1_process_opa_mad(ibdev, mad_flags, port,
					    in_wc, in_grh,
					    (struct opa_mad *)in_mad,
					    (struct opa_mad *)out_mad,
					    out_mad_size,
					    out_mad_pkey_index);
	case IB_MGMT_BASE_VERSION:
		return hfi1_process_ib_mad(ibdev, mad_flags, port, in_wc,
					   in_grh, in_mad, out_mad);
	default:
		break;
	}

	return IB_MAD_RESULT_FAILURE;
}