d2b8d4da1c
The current code is problematic when the QP creation and ipoib is used to support NFS and NFS desires to do IO for paging purposes. In that case, the GFP_KERNEL allocation within create_qp causes a deadlock in tight memory situations. This fix adds support to create queue pair with GFP_NOIO flag for connected mode only to cleanly fail the create queue pair in those situations. This was previously fixed in qib but needed to get ported to hfi1. This patch handles that for both hardwares in the new rdmavt common layer. Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
349 lines
10 KiB
C
349 lines
10 KiB
C
#ifndef DEF_RDMA_VT_H
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#define DEF_RDMA_VT_H
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/*
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* Copyright(c) 2015 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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/*
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* Structure that low level drivers will populate in order to register with the
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* rdmavt layer.
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*/
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/rdmavt_mr.h>
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#include <rdma/rdmavt_qp.h>
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/*
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* For some of the IBTA objects there will likely be some
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* initializations required. We need flags to determine whether it is OK
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* for rdmavt to do this or not. This does not imply any functions of a
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* partiuclar IBTA object are overridden.
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*/
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#define RVT_FLAG_MR_INIT_DRIVER BIT(1)
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#define RVT_FLAG_QP_INIT_DRIVER BIT(2)
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#define RVT_FLAG_CQ_INIT_DRIVER BIT(3)
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#define RVT_MAX_PKEY_VALUES 16
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struct rvt_ibport {
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struct rvt_qp __rcu *qp[2];
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struct ib_mad_agent *send_agent; /* agent for SMI (traps) */
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struct rb_root mcast_tree;
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spinlock_t lock; /* protect changes in this struct */
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/* non-zero when timer is set */
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unsigned long mkey_lease_timeout;
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unsigned long trap_timeout;
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__be64 gid_prefix; /* in network order */
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__be64 mkey;
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u64 tid;
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u32 port_cap_flags;
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u32 pma_sample_start;
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u32 pma_sample_interval;
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__be16 pma_counter_select[5];
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u16 pma_tag;
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u16 mkey_lease_period;
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u16 sm_lid;
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u8 sm_sl;
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u8 mkeyprot;
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u8 subnet_timeout;
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u8 vl_high_limit;
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/*
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* Driver is expected to keep these up to date. These
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* counters are informational only and not required to be
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* completely accurate.
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*/
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u64 n_rc_resends;
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u64 n_seq_naks;
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u64 n_rdma_seq;
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u64 n_rnr_naks;
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u64 n_other_naks;
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u64 n_loop_pkts;
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u64 n_pkt_drops;
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u64 n_vl15_dropped;
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u64 n_rc_timeouts;
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u64 n_dmawait;
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u64 n_unaligned;
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u64 n_rc_dupreq;
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u64 n_rc_seqnak;
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u16 pkey_violations;
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u16 qkey_violations;
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u16 mkey_violations;
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/* Hot-path per CPU counters to avoid cacheline trading to update */
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u64 z_rc_acks;
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u64 z_rc_qacks;
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u64 z_rc_delayed_comp;
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u64 __percpu *rc_acks;
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u64 __percpu *rc_qacks;
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u64 __percpu *rc_delayed_comp;
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void *priv; /* driver private data */
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/*
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* The pkey table is allocated and maintained by the driver. Drivers
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* need to have access to this before registering with rdmav. However
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* rdmavt will need access to it so drivers need to proviee this during
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* the attach port API call.
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*/
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u16 *pkey_table;
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/* TODO: Move sm_ah and smi_ah into here as well*/
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};
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/*
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* Things that are driver specific, module parameters in hfi1 and qib
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*/
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struct rvt_driver_params {
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/*
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* driver required fields:
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* node_guid
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* phys_port_cnt
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* dma_device
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* owner
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* driver optional fields (rvt will provide generic value if blank):
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* name
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* node_desc
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* rvt fields, driver value ignored:
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* uverbs_abi_ver
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* node_type
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* num_comp_vectors
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* uverbs_cmd_mask
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*/
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struct ib_device_attr props;
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/*
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* Drivers will need to support a number of notifications to rvt in
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* accordance with certain events. This structure should contain a mask
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* of the supported events. Such events that the rvt may need to know
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* about include:
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* port errors
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* port active
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* lid change
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* sm change
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* client reregister
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* pkey change
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*
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* There may also be other events that the rvt layers needs to know
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* about this is not an exhaustive list. Some events though rvt does not
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* need to rely on the driver for such as completion queue error.
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*/
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int rvt_signal_supported;
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/*
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* Anything driver specific that is not covered by props
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* For instance special module parameters. Goes here.
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*/
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unsigned int lkey_table_size;
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unsigned int qp_table_size;
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int qpn_start;
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int qpn_inc;
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int qpn_res_start;
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int qpn_res_end;
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int nports;
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int npkeys;
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u8 qos_shift;
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};
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/* Protection domain */
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struct rvt_pd {
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struct ib_pd ibpd;
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int user; /* non-zero if created from user space */
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};
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/* Address handle */
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struct rvt_ah {
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struct ib_ah ibah;
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struct ib_ah_attr attr;
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atomic_t refcount;
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u8 vl;
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u8 log_pmtu;
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};
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struct rvt_dev_info;
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struct rvt_driver_provided {
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/*
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* The work to create port files in /sys/class Infiniband is different
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* depending on the driver. This should not be extracted away and
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* instead drivers are responsible for setting the correct callback for
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* this.
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*/
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/* -------------------*/
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/* Required functions */
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/* -------------------*/
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int (*port_callback)(struct ib_device *, u8, struct kobject *);
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const char * (*get_card_name)(struct rvt_dev_info *rdi);
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struct pci_dev * (*get_pci_dev)(struct rvt_dev_info *rdi);
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unsigned (*free_all_qps)(struct rvt_dev_info *rdi);
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void * (*qp_priv_alloc)(struct rvt_dev_info *rdi, struct rvt_qp *qp,
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gfp_t gfp);
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void (*qp_priv_free)(struct rvt_dev_info *rdi, struct rvt_qp *qp);
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void (*notify_qp_reset)(struct rvt_qp *qp);
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/*--------------------*/
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/* Optional functions */
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/*--------------------*/
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int (*check_ah)(struct ib_device *, struct ib_ah_attr *);
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void (*notify_new_ah)(struct ib_device *, struct ib_ah_attr *,
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struct rvt_ah *);
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int (*alloc_qpn)(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt,
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enum ib_qp_type type, u8 port, gfp_t gfp);
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};
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struct rvt_dev_info {
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struct ib_device ibdev; /* Keep this first. Nothing above here */
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/*
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* Prior to calling for registration the driver will be responsible for
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* allocating space for this structure.
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*
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* The driver will also be responsible for filling in certain members of
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* dparms.props. The driver needs to fill in dparms exactly as it would
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* want values reported to a ULP. This will be returned to the caller
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* in rdmavt's device. The driver should also therefore refrain from
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* modifying this directly after registration with rdmavt.
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*/
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/* Driver specific properties */
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struct rvt_driver_params dparms;
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struct rvt_mregion __rcu *dma_mr;
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struct rvt_lkey_table lkey_table;
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/* Driver specific helper functions */
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struct rvt_driver_provided driver_f;
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/* Internal use */
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int n_pds_allocated;
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spinlock_t n_pds_lock; /* Protect pd allocated count */
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int n_ahs_allocated;
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spinlock_t n_ahs_lock; /* Protect ah allocated count */
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int flags;
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struct rvt_ibport **ports;
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/* QP */
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struct rvt_qp_ibdev *qp_dev;
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u32 n_qps_allocated; /* number of QPs allocated for device */
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spinlock_t n_qps_lock; /* keep track of number of qps */
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/* memory maps */
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struct list_head pending_mmaps;
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spinlock_t mmap_offset_lock; /* protect mmap_offset */
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u32 mmap_offset;
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spinlock_t pending_lock; /* protect pending mmap list */
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};
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static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd)
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{
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return container_of(ibpd, struct rvt_pd, ibpd);
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}
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static inline struct rvt_ah *ibah_to_rvtah(struct ib_ah *ibah)
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{
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return container_of(ibah, struct rvt_ah, ibah);
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}
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static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev)
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{
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return container_of(ibdev, struct rvt_dev_info, ibdev);
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}
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static inline struct rvt_srq *ibsrq_to_rvtsrq(struct ib_srq *ibsrq)
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{
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return container_of(ibsrq, struct rvt_srq, ibsrq);
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}
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static inline unsigned rvt_get_npkeys(struct rvt_dev_info *rdi)
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{
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/*
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* All ports have same number of pkeys.
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*/
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return rdi->dparms.npkeys;
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}
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/*
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* Return the indexed PKEY from the port PKEY table.
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*/
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static inline u16 rvt_get_pkey(struct rvt_dev_info *rdi,
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int port_index,
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unsigned index)
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{
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if (index >= rvt_get_npkeys(rdi))
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return 0;
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else
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return rdi->ports[port_index]->pkey_table[index];
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}
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int rvt_register_device(struct rvt_dev_info *rvd);
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void rvt_unregister_device(struct rvt_dev_info *rvd);
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int rvt_check_ah(struct ib_device *ibdev, struct ib_ah_attr *ah_attr);
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int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port,
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int portnum, u16 *pkey_table);
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int rvt_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge,
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u32 len, u64 vaddr, u32 rkey, int acc);
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int rvt_lkey_ok(struct rvt_lkey_table *rkt, struct rvt_pd *pd,
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struct rvt_sge *isge, struct ib_sge *sge, int acc);
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int rvt_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
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void rvt_release_mmap_info(struct kref *ref);
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struct rvt_mmap_info *rvt_create_mmap_info(struct rvt_dev_info *rdi,
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u32 size,
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struct ib_ucontext *context,
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void *obj);
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void rvt_update_mmap_info(struct rvt_dev_info *rdi, struct rvt_mmap_info *ip,
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u32 size, void *obj);
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/* Temporary export */
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void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp,
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enum ib_qp_type type);
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#endif /* DEF_RDMA_VT_H */
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