334 lines
9.4 KiB
C
334 lines
9.4 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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void (*free_all_qps)(struct rvt_dev_info *rdi);
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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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};
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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
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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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struct rvt_qp_ibdev *qp_dev;
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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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#endif /* DEF_RDMA_VT_H */
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