264 lines
8.2 KiB
C
264 lines
8.2 KiB
C
/*
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* Copyright(c) 2015, 2016 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/bitmap.h>
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#include "hfi.h"
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#include "common.h"
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#include "sdma.h"
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#define LINK_UP_DELAY 500 /* in microseconds */
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static void set_mgmt_allowed(struct hfi1_pportdata *ppd)
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{
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u32 frame;
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struct hfi1_devdata *dd = ppd->dd;
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if (ppd->neighbor_type == NEIGHBOR_TYPE_HFI) {
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ppd->mgmt_allowed = 1;
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} else {
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read_8051_config(dd, REMOTE_LNI_INFO, GENERAL_CONFIG, &frame);
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ppd->mgmt_allowed = (frame >> MGMT_ALLOWED_SHIFT)
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& MGMT_ALLOWED_MASK;
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}
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}
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/*
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* Our neighbor has indicated that we are allowed to act as a fabric
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* manager, so place the full management partition key in the second
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* (0-based) pkey array position. Note that we should already have
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* the limited management partition key in array element 1, and also
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* that the port is not yet up when add_full_mgmt_pkey() is invoked.
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*/
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static void add_full_mgmt_pkey(struct hfi1_pportdata *ppd)
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{
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struct hfi1_devdata *dd = ppd->dd;
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/* Sanity check - ppd->pkeys[2] should be 0, or already initialized */
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if (!((ppd->pkeys[2] == 0) || (ppd->pkeys[2] == FULL_MGMT_P_KEY)))
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dd_dev_warn(dd, "%s pkey[2] already set to 0x%x, resetting it to 0x%x\n",
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__func__, ppd->pkeys[2], FULL_MGMT_P_KEY);
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ppd->pkeys[2] = FULL_MGMT_P_KEY;
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(void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
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hfi1_event_pkey_change(ppd->dd, ppd->port);
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}
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/**
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* format_hwmsg - format a single hwerror message
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* @msg message buffer
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* @msgl length of message buffer
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* @hwmsg message to add to message buffer
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*/
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static void format_hwmsg(char *msg, size_t msgl, const char *hwmsg)
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{
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strlcat(msg, "[", msgl);
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strlcat(msg, hwmsg, msgl);
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strlcat(msg, "]", msgl);
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}
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/**
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* hfi1_format_hwerrors - format hardware error messages for display
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* @hwerrs hardware errors bit vector
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* @hwerrmsgs hardware error descriptions
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* @nhwerrmsgs number of hwerrmsgs
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* @msg message buffer
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* @msgl message buffer length
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*/
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void hfi1_format_hwerrors(u64 hwerrs, const struct hfi1_hwerror_msgs *hwerrmsgs,
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size_t nhwerrmsgs, char *msg, size_t msgl)
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{
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int i;
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for (i = 0; i < nhwerrmsgs; i++)
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if (hwerrs & hwerrmsgs[i].mask)
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format_hwmsg(msg, msgl, hwerrmsgs[i].msg);
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}
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static void signal_ib_event(struct hfi1_pportdata *ppd, enum ib_event_type ev)
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{
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struct ib_event event;
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struct hfi1_devdata *dd = ppd->dd;
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/*
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* Only call ib_dispatch_event() if the IB device has been
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* registered. HFI1_INITED is set iff the driver has successfully
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* registered with the IB core.
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*/
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if (!(dd->flags & HFI1_INITTED))
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return;
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event.device = &dd->verbs_dev.rdi.ibdev;
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event.element.port_num = ppd->port;
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event.event = ev;
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ib_dispatch_event(&event);
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}
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/**
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* handle_linkup_change - finish linkup/down state changes
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* @dd: valid device
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* @linkup: link state information
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*
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* Handle a linkup or link down notification.
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* The HW needs time to finish its link up state change. Give it that chance.
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*
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* This is called outside an interrupt.
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*
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*/
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void handle_linkup_change(struct hfi1_devdata *dd, u32 linkup)
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{
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struct hfi1_pportdata *ppd = &dd->pport[0];
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enum ib_event_type ev;
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if (!(ppd->linkup ^ !!linkup))
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return; /* no change, nothing to do */
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if (linkup) {
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/*
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* Quick linkup and all link up on the simulator does not
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* trigger or implement:
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* - VerifyCap interrupt
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* - VerifyCap frames
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* But rather moves directly to LinkUp.
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*
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* Do the work of the VerifyCap interrupt handler,
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* handle_verify_cap(), but do not try moving the state to
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* LinkUp as we are already there.
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*
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* NOTE: This uses this device's vAU, vCU, and vl15_init for
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* the remote values. Both sides must be using the values.
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*/
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if (quick_linkup || dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
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set_up_vau(dd, dd->vau);
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set_up_vl15(dd, dd->vl15_init);
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assign_remote_cm_au_table(dd, dd->vcu);
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}
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ppd->neighbor_guid =
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read_csr(dd, DC_DC8051_STS_REMOTE_GUID);
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ppd->neighbor_type =
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read_csr(dd, DC_DC8051_STS_REMOTE_NODE_TYPE) &
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DC_DC8051_STS_REMOTE_NODE_TYPE_VAL_MASK;
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ppd->neighbor_port_number =
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read_csr(dd, DC_DC8051_STS_REMOTE_PORT_NO) &
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DC_DC8051_STS_REMOTE_PORT_NO_VAL_SMASK;
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ppd->neighbor_fm_security =
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read_csr(dd, DC_DC8051_STS_REMOTE_FM_SECURITY) &
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DC_DC8051_STS_LOCAL_FM_SECURITY_DISABLED_MASK;
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dd_dev_info(dd,
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"Neighbor Guid %llx, Type %d, Port Num %d\n",
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ppd->neighbor_guid, ppd->neighbor_type,
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ppd->neighbor_port_number);
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/* HW needs LINK_UP_DELAY to settle, give it that chance */
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udelay(LINK_UP_DELAY);
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/*
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* 'MgmtAllowed' information, which is exchanged during
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* LNI, is available at this point.
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*/
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set_mgmt_allowed(ppd);
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if (ppd->mgmt_allowed)
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add_full_mgmt_pkey(ppd);
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/* physical link went up */
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ppd->linkup = 1;
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ppd->offline_disabled_reason =
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HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE);
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/* link widths are not available until the link is fully up */
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get_linkup_link_widths(ppd);
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} else {
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/* physical link went down */
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ppd->linkup = 0;
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/* clear HW details of the previous connection */
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ppd->actual_vls_operational = 0;
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reset_link_credits(dd);
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/* freeze after a link down to guarantee a clean egress */
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start_freeze_handling(ppd, FREEZE_SELF | FREEZE_LINK_DOWN);
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ev = IB_EVENT_PORT_ERR;
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hfi1_set_uevent_bits(ppd, _HFI1_EVENT_LINKDOWN_BIT);
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/* if we are down, the neighbor is down */
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ppd->neighbor_normal = 0;
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/* notify IB of the link change */
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signal_ib_event(ppd, ev);
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}
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}
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/*
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* Handle receive or urgent interrupts for user contexts. This means a user
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* process was waiting for a packet to arrive, and didn't want to poll.
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*/
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void handle_user_interrupt(struct hfi1_ctxtdata *rcd)
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{
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struct hfi1_devdata *dd = rcd->dd;
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unsigned long flags;
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spin_lock_irqsave(&dd->uctxt_lock, flags);
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if (bitmap_empty(rcd->in_use_ctxts, HFI1_MAX_SHARED_CTXTS))
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goto done;
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if (test_and_clear_bit(HFI1_CTXT_WAITING_RCV, &rcd->event_flags)) {
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wake_up_interruptible(&rcd->wait);
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hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_DIS, rcd);
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} else if (test_and_clear_bit(HFI1_CTXT_WAITING_URG,
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&rcd->event_flags)) {
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rcd->urgent++;
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wake_up_interruptible(&rcd->wait);
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}
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done:
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spin_unlock_irqrestore(&dd->uctxt_lock, flags);
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}
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