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mad.c
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/*
* Copyright(c) 2015, 2016 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>
#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"
/* 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
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 void send_trap(struct hfi1_ibport *ibp, void *data, unsigned len)
{
struct ib_mad_send_buf *send_buf;
struct ib_mad_agent *agent;
struct opa_smp *smp;
int ret;
unsigned long flags;
unsigned long timeout;
int pkey_idx;
u32 qpn = ppd_from_ibp(ibp)->sm_trap_qp;
agent = ibp->send_agent;
if (!agent)
return;
/* o14-3.2.1 */
if (ppd_from_ibp(ibp)->lstate != IB_PORT_ACTIVE)
return;
/* o14-2 */
if (ibp->trap_timeout && time_before(jiffies, ibp->trap_timeout))
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_SMI_CLASS_VERSION;
smp->method = IB_MGMT_METHOD_TRAP;
ibp->tid++;
smp->tid = cpu_to_be64(ibp->tid);
smp->attr_id = IB_SMP_ATTR_NOTICE;
/* o14-1: smp->mkey = 0; */
memcpy(smp->route.lid.data, data, len);
spin_lock_irqsave(&ibp->lock, flags);
if (!ibp->sm_ah) {
if (ibp->sm_lid != be16_to_cpu(IB_LID_PERMISSIVE)) {
struct ib_ah *ah;
ah = hfi1_create_qp0_ah(ibp, ibp->sm_lid);
if (IS_ERR(ah)) {
ret = PTR_ERR(ah);
} else {
send_buf->ah = ah;
ibp->sm_ah = to_iah(ah);
ret = 0;
}
} else {
ret = -EINVAL;
}
} else {
send_buf->ah = &ibp->sm_ah->ibah;
ret = 0;
}
spin_unlock_irqrestore(&ibp->lock, flags);
if (!ret)
ret = ib_post_send_mad(send_buf, NULL);
if (!ret) {
/* 4.096 usec. */
timeout = (4096 * (1UL << ibp->subnet_timeout)) / 1000;
ibp->trap_timeout = jiffies + usecs_to_jiffies(timeout);
} else {
ib_free_send_mad(send_buf);
ibp->trap_timeout = 0;
}
}
/*
* Send a bad [PQ]_Key trap (ch. 14.3.8).
*/
void hfi1_bad_pqkey(struct hfi1_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
u32 qp1, u32 qp2, u16 lid1, u16 lid2)
{
struct opa_mad_notice_attr data;
u32 lid = ppd_from_ibp(ibp)->lid;
u32 _lid1 = lid1;
u32 _lid2 = lid2;
memset(&data, 0, sizeof(data));
if (trap_num == OPA_TRAP_BAD_P_KEY)
ibp->pkey_violations++;
else
ibp->qkey_violations++;
ibp->n_pkt_drops++;
/* Send violation trap */
data.generic_type = IB_NOTICE_TYPE_SECURITY;
data.prod_type_lsb = IB_NOTICE_PROD_CA;
data.trap_num = trap_num;
data.issuer_lid = cpu_to_be32(lid);
data.ntc_257_258.lid1 = cpu_to_be32(_lid1);
data.ntc_257_258.lid2 = cpu_to_be32(_lid2);
data.ntc_257_258.key = cpu_to_be32(key);
data.ntc_257_258.sl = sl << 3;
data.ntc_257_258.qp1 = cpu_to_be32(qp1);
data.ntc_257_258.qp2 = cpu_to_be32(qp2);
send_trap(ibp, &data, sizeof(data));
}
/*
* 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 opa_mad_notice_attr data;
u32 lid = ppd_from_ibp(ibp)->lid;
memset(&data, 0, sizeof(data));
/* Send violation trap */
data.generic_type = IB_NOTICE_TYPE_SECURITY;
data.prod_type_lsb = IB_NOTICE_PROD_CA;
data.trap_num = OPA_TRAP_BAD_M_KEY;
data.issuer_lid = cpu_to_be32(lid);
data.ntc_256.lid = data.issuer_lid;
data.ntc_256.method = mad->method;
data.ntc_256.attr_id = mad->attr_id;
data.ntc_256.attr_mod = mad->attr_mod;
data.ntc_256.mkey = mkey;
if (mad->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
data.ntc_256.dr_slid = dr_slid;
data.ntc_256.dr_trunc_hop = IB_NOTICE_TRAP_DR_NOTICE;
if (hop_cnt > ARRAY_SIZE(data.ntc_256.dr_rtn_path)) {
data.ntc_256.dr_trunc_hop |=
IB_NOTICE_TRAP_DR_TRUNC;
hop_cnt = ARRAY_SIZE(data.ntc_256.dr_rtn_path);
}
data.ntc_256.dr_trunc_hop |= hop_cnt;
memcpy(data.ntc_256.dr_rtn_path, return_path,
hop_cnt);
}
send_trap(ibp, &data, sizeof(data));
}
/*
* Send a Port Capability Mask Changed trap (ch. 14.3.11).
*/
void hfi1_cap_mask_chg(struct hfi1_ibport *ibp)
{
struct opa_mad_notice_attr data;
u32 lid = ppd_from_ibp(ibp)->lid;
memset(&data, 0, sizeof(data));
data.generic_type = IB_NOTICE_TYPE_INFO;
data.prod_type_lsb = IB_NOTICE_PROD_CA;
data.trap_num = OPA_TRAP_CHANGE_CAPABILITY;
data.issuer_lid = cpu_to_be32(lid);
data.ntc_144.lid = data.issuer_lid;
data.ntc_144.new_cap_mask = cpu_to_be32(ibp->port_cap_flags);
send_trap(ibp, &data, sizeof(data));
}
/*
* Send a System Image GUID Changed trap (ch. 14.3.12).
*/
void hfi1_sys_guid_chg(struct hfi1_ibport *ibp)
{
struct opa_mad_notice_attr data;
u32 lid = ppd_from_ibp(ibp)->lid;
memset(&data, 0, sizeof(data));
data.generic_type = IB_NOTICE_TYPE_INFO;
data.prod_type_lsb = IB_NOTICE_PROD_CA;
data.trap_num = OPA_TRAP_CHANGE_SYSGUID;
data.issuer_lid = cpu_to_be32(lid);
data.ntc_145.new_sys_guid = ib_hfi1_sys_image_guid;
data.ntc_145.lid = data.issuer_lid;
send_trap(ibp, &data, sizeof(data));
}
/*
* Send a Node Description Changed trap (ch. 14.3.13).
*/
void hfi1_node_desc_chg(struct hfi1_ibport *ibp)
{
struct opa_mad_notice_attr data;
u32 lid = ppd_from_ibp(ibp)->lid;
memset(&data, 0, sizeof(data));
data.generic_type = IB_NOTICE_TYPE_INFO;
data.prod_type_lsb = IB_NOTICE_PROD_CA;
data.trap_num = OPA_TRAP_CHANGE_CAPABILITY;
data.issuer_lid = cpu_to_be32(lid);
data.ntc_144.lid = data.issuer_lid;
data.ntc_144.change_flags =
cpu_to_be16(OPA_NOTICE_TRAP_NODE_DESC_CHG);
send_trap(ibp, &data, sizeof(data));
}
static int __subn_get_opa_nodedesc(struct opa_smp *smp, u32 am,
u8 *data, struct ib_device *ibdev,
u8 port, u32 *resp_len)
{
struct opa_node_description *nd;
if (am) {
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, u8 port,
u32 *resp_len)
{
struct opa_node_info *ni;
struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
unsigned 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 || dd->pport[pidx].guid == 0) {
smp->status |= IB_SMP_INVALID_FIELD;
return reply((struct ib_mad_hdr *)smp);
}
ni->port_guid = cpu_to_be64(dd->pport[pidx].guid);
ni->base_version = OPA_MGMT_BASE_VERSION;
ni->class_version = OPA_SMI_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;
/* Use first-port GUID as node */
ni->node_guid = cpu_to_be64(dd->pport->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,
u8 port)
{
struct ib_node_info *nip = (struct ib_node_info *)&smp->data;
struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
unsigned pidx = port - 1; /* IB number port from 1, hw from 0 */
/* GUID 0 is illegal */
if (smp->attr_mod || pidx >= dd->num_pports ||
dd->pport[pidx].guid == 0)
smp->status |= IB_SMP_INVALID_FIELD;
else
nip->port_guid = cpu_to_be64(dd->pport[pidx].guid);
nip->base_version = OPA_MGMT_BASE_VERSION;
nip->class_version = OPA_SMI_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;
/* Use first-port GUID as node */
nip->node_guid = cpu_to_be64(dd->pport->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->mkey_lease_timeout &&
time_after_eq(jiffies, ibp->mkey_lease_timeout)) {
/* Clear timeout and mkey protection field. */
ibp->mkey_lease_timeout = 0;
ibp->mkeyprot = 0;
}
if ((mad_flags & IB_MAD_IGNORE_MKEY) || ibp->mkey == 0 ||
ibp->mkey == mkey)
valid_mkey = 1;
/* Unset lease timeout on any valid Get/Set/TrapRepress */
if (valid_mkey && ibp->mkey_lease_timeout &&
(mad->method == IB_MGMT_METHOD_GET ||
mad->method == IB_MGMT_METHOD_SET ||
mad->method == IB_MGMT_METHOD_TRAP_REPRESS))
ibp->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->mkeyprot < 2)
break;
case IB_MGMT_METHOD_SET:
case IB_MGMT_METHOD_TRAP_REPRESS:
if (ibp->mkey_violations != 0xFFFF)
++ibp->mkey_violations;
if (!ibp->mkey_lease_timeout && ibp->mkey_lease_period)
ibp->mkey_lease_timeout = jiffies +
ibp->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, ®))
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, u8 port,
u32 *resp_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->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->mkey != smp->mkey &&
ibp->mkeyprot == 1))
pi->mkey = ibp->mkey;
pi->subnet_prefix = ibp->gid_prefix;
pi->sm_lid = cpu_to_be32(ibp->sm_lid);
pi->ib_cap_mask = cpu_to_be32(ibp->port_cap_flags);
pi->mkey_lease_period = cpu_to_be16(ibp->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);
#if PI_LED_ENABLE_SUP
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;
#else
pi->port_states.offline_reason = ppd->neighbor_normal << 4;
pi->port_states.offline_reason |= ppd->is_sm_config_started << 5;
pi->port_states.offline_reason |= ppd->offline_disabled_reason;
#endif /* PI_LED_ENABLE_SUP */
pi->port_states.portphysstate_portstate =
(hfi1_ibphys_portstate(ppd) << 4) | state;
pi->mkeyprotect_lmc = (ibp->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->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->mkey_violations);
/* P_KeyViolations are counted by hardware. */
pi->pkey_violations = cpu_to_be16(ibp->pkey_violations);
pi->qkey_violations = cpu_to_be16(ibp->qkey_violations);
pi->vl.cap = ppd->vls_supported;
pi->vl.high_limit = cpu_to_be16(ibp->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->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);
pi->port_packet_format.enabled =
cpu_to_be16(OPA_PORT_PACKET_FORMAT_9B);
/*
* 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(OPA_CAP_MASK3_IsSharedSpaceSupported);
/* 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, u8 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, u8 port,
u32 *resp_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 (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_physical_state(ppd);
u32 logical_old = driver_logical_state(ppd);
int ret, logical_allowed, physical_allowed;
logical_allowed = logical_transition_allowed(logical_old, logical_new);
ret = logical_transition_allowed(logical_old, logical_new);
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;
}
physical_allowed = physical_transition_allowed(physical_old,
physical_new);
ret = physical_transition_allowed(physical_old, physical_new);
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 suppress_idle_sma)
{
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;