501 lines
14 KiB
C
501 lines
14 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) 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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/*
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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 <linux/hash.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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#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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struct rvt_ah *sm_ah;
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};
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#define RVT_CQN_MAX 16 /* maximum length of cq name */
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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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struct ib_device_attr props;
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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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char cq_name[RVT_CQN_MAX];
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int node;
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int psn_mask;
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int psn_shift;
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int psn_modify_mask;
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u32 core_cap_flags;
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u32 max_mad_size;
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u8 qos_shift;
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u8 max_rdma_atomic;
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u8 reserved_operations;
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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_swqe;
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struct rvt_driver_provided {
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/*
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* Which functions are required depends on which verbs rdmavt is
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* providing and which verbs the driver is overriding. See
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* check_support() for details.
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*/
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/* Passed to ib core registration. Callback to create syfs files */
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int (*port_callback)(struct ib_device *, u8, struct kobject *);
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/*
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* Returns a string to represent the device for which is being
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* registered. This is primarily used for error and debug messages on
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* the console.
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*/
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const char * (*get_card_name)(struct rvt_dev_info *rdi);
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/*
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* Returns a pointer to the undelying hardware's PCI device. This is
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* used to display information as to what hardware is being referenced
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* in an output message
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*/
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struct pci_dev * (*get_pci_dev)(struct rvt_dev_info *rdi);
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/*
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* Allocate a private queue pair data structure for driver specific
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* information which is opaque to rdmavt. Errors are returned via
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* ERR_PTR(err). The driver is free to return NULL or a valid
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* pointer.
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*/
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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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/*
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* Free the driver's private qp structure.
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*/
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void (*qp_priv_free)(struct rvt_dev_info *rdi, struct rvt_qp *qp);
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/*
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* Inform the driver the particular qp in quesiton has been reset so
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* that it can clean up anything it needs to.
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*/
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void (*notify_qp_reset)(struct rvt_qp *qp);
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/*
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* Give the driver a notice that there is send work to do. It is up to
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* the driver to generally push the packets out, this just queues the
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* work with the driver. There are two variants here. The no_lock
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* version requires the s_lock not to be held. The other assumes the
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* s_lock is held.
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*/
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void (*schedule_send)(struct rvt_qp *qp);
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void (*schedule_send_no_lock)(struct rvt_qp *qp);
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/*
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* Sometimes rdmavt needs to kick the driver's send progress. That is
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* done by this call back.
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*/
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void (*do_send)(struct rvt_qp *qp);
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/*
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* Get a path mtu from the driver based on qp attributes.
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*/
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int (*get_pmtu_from_attr)(struct rvt_dev_info *rdi, struct rvt_qp *qp,
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struct ib_qp_attr *attr);
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/*
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* Notify driver that it needs to flush any outstanding IO requests that
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* are waiting on a qp.
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*/
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void (*flush_qp_waiters)(struct rvt_qp *qp);
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/*
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* Notify driver to stop its queue of sending packets. Nothing else
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* should be posted to the queue pair after this has been called.
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*/
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void (*stop_send_queue)(struct rvt_qp *qp);
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/*
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* Have the drivr drain any in progress operations
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*/
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void (*quiesce_qp)(struct rvt_qp *qp);
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/*
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* Inform the driver a qp has went to error state.
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*/
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void (*notify_error_qp)(struct rvt_qp *qp);
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/*
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* Get an MTU for a qp.
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*/
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u32 (*mtu_from_qp)(struct rvt_dev_info *rdi, struct rvt_qp *qp,
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u32 pmtu);
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/*
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* Convert an mtu to a path mtu
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*/
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int (*mtu_to_path_mtu)(u32 mtu);
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/*
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* Get the guid of a port in big endian byte order
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*/
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int (*get_guid_be)(struct rvt_dev_info *rdi, struct rvt_ibport *rvp,
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int guid_index, __be64 *guid);
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/*
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* Query driver for the state of the port.
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*/
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int (*query_port_state)(struct rvt_dev_info *rdi, u8 port_num,
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struct ib_port_attr *props);
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/*
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* Tell driver to shutdown a port
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*/
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int (*shut_down_port)(struct rvt_dev_info *rdi, u8 port_num);
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/* Tell driver to send a trap for changed port capabilities */
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void (*cap_mask_chg)(struct rvt_dev_info *rdi, u8 port_num);
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/*
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* The following functions can be safely ignored completely. Any use of
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* these is checked for NULL before blindly calling. Rdmavt should also
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* be functional if drivers omit these.
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*/
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/* Called to inform the driver that all qps should now be freed. */
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unsigned (*free_all_qps)(struct rvt_dev_info *rdi);
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/* Driver specific AH validation */
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int (*check_ah)(struct ib_device *, struct ib_ah_attr *);
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/* Inform the driver a new AH has been created */
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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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/* Let the driver pick the next queue pair number*/
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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_num, gfp_t gfp);
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/* Determine if its safe or allowed to modify the qp */
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int (*check_modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr,
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int attr_mask, struct ib_udata *udata);
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/* Driver specific QP modification/notification-of */
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void (*modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr,
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int attr_mask, struct ib_udata *udata);
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/* Driver specific work request checking */
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int (*check_send_wqe)(struct rvt_qp *qp, struct rvt_swqe *wqe);
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/* Notify driver a mad agent has been created */
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void (*notify_create_mad_agent)(struct rvt_dev_info *rdi, int port_idx);
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/* Notify driver a mad agent has been removed */
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void (*notify_free_mad_agent)(struct rvt_dev_info *rdi, int port_idx);
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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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/* post send table */
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const struct rvt_operation_params *post_parms;
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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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u32 n_srqs_allocated;
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spinlock_t n_srqs_lock; /* Protect srqs 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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u32 n_rc_qps; /* number of RC QPs allocated for device */
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u32 busy_jiffies; /* timeout scaling based on RC QP count */
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spinlock_t n_qps_lock; /* protect qps, rc qps and busy jiffy counts */
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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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/* CQ */
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struct kthread_worker *worker; /* per device cq worker */
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u32 n_cqs_allocated; /* number of CQs allocated for device */
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spinlock_t n_cqs_lock; /* protect count of in use cqs */
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/* Multicast */
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u32 n_mcast_grps_allocated; /* number of mcast groups allocated */
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spinlock_t n_mcast_grps_lock;
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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 struct rvt_qp *ibqp_to_rvtqp(struct ib_qp *ibqp)
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{
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return container_of(ibqp, struct rvt_qp, ibqp);
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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 max atomic suitable for determining
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* the size of the ack ring buffer in a QP.
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*/
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static inline unsigned int rvt_max_atomic(struct rvt_dev_info *rdi)
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{
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return rdi->dparms.max_rdma_atomic + 1;
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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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/**
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* rvt_lookup_qpn - return the QP with the given QPN
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* @ibp: the ibport
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* @qpn: the QP number to look up
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*
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* The caller must hold the rcu_read_lock(), and keep the lock until
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* the returned qp is no longer in use.
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*/
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/* TODO: Remove this and put in rdmavt/qp.h when no longer needed by drivers */
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static inline struct rvt_qp *rvt_lookup_qpn(struct rvt_dev_info *rdi,
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struct rvt_ibport *rvp,
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u32 qpn) __must_hold(RCU)
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{
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struct rvt_qp *qp = NULL;
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if (unlikely(qpn <= 1)) {
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qp = rcu_dereference(rvp->qp[qpn]);
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} else {
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u32 n = hash_32(qpn, rdi->qp_dev->qp_table_bits);
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for (qp = rcu_dereference(rdi->qp_dev->qp_table[n]); qp;
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qp = rcu_dereference(qp->next))
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if (qp->ibqp.qp_num == qpn)
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break;
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}
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return qp;
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}
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struct rvt_dev_info *rvt_alloc_device(size_t size, int nports);
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void rvt_dealloc_device(struct rvt_dev_info *rdi);
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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 port_index, u16 *pkey_table);
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int rvt_fast_reg_mr(struct rvt_qp *qp, struct ib_mr *ibmr, u32 key,
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int access);
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int rvt_invalidate_rkey(struct rvt_qp *qp, u32 rkey);
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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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struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid);
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#endif /* DEF_RDMA_VT_H */
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