453 lines
12 KiB
C
453 lines
12 KiB
C
/*
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* Copyright(c) 2015 - 2018 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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#ifndef HFI1_VERBS_H
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#define HFI1_VERBS_H
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#include <linux/types.h>
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#include <linux/seqlock.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/kref.h>
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#include <linux/workqueue.h>
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#include <linux/kthread.h>
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#include <linux/completion.h>
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#include <linux/slab.h>
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#include <rdma/ib_pack.h>
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#include <rdma/ib_user_verbs.h>
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#include <rdma/ib_mad.h>
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#include <rdma/ib_hdrs.h>
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#include <rdma/rdma_vt.h>
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#include <rdma/rdmavt_qp.h>
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#include <rdma/rdmavt_cq.h>
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struct hfi1_ctxtdata;
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struct hfi1_pportdata;
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struct hfi1_devdata;
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struct hfi1_packet;
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#include "iowait.h"
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#define HFI1_MAX_RDMA_ATOMIC 16
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/*
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* Increment this value if any changes that break userspace ABI
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* compatibility are made.
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*/
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#define HFI1_UVERBS_ABI_VERSION 2
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/* IB Performance Manager status values */
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#define IB_PMA_SAMPLE_STATUS_DONE 0x00
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#define IB_PMA_SAMPLE_STATUS_STARTED 0x01
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#define IB_PMA_SAMPLE_STATUS_RUNNING 0x02
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/* Mandatory IB performance counter select values. */
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#define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)
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#define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)
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#define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)
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#define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)
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#define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)
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#define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)
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#define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
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#define OPA_BTH_MIG_REQ BIT(31)
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#define RC_OP(x) IB_OPCODE_RC_##x
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#define UC_OP(x) IB_OPCODE_UC_##x
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/* flags passed by hfi1_ib_rcv() */
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enum {
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HFI1_HAS_GRH = (1 << 0),
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};
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#define LRH_16B_BYTES (FIELD_SIZEOF(struct hfi1_16b_header, lrh))
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#define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))
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#define LRH_9B_BYTES (FIELD_SIZEOF(struct ib_header, lrh))
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#define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))
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/* 24Bits for qpn, upper 8Bits reserved */
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struct opa_16b_mgmt {
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__be32 dest_qpn;
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__be32 src_qpn;
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};
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struct hfi1_16b_header {
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u32 lrh[4];
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union {
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struct {
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struct ib_grh grh;
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struct ib_other_headers oth;
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} l;
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struct ib_other_headers oth;
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struct opa_16b_mgmt mgmt;
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} u;
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} __packed;
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struct hfi1_opa_header {
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union {
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struct ib_header ibh; /* 9B header */
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struct hfi1_16b_header opah; /* 16B header */
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};
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u8 hdr_type; /* 9B or 16B */
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} __packed;
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struct hfi1_ahg_info {
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u32 ahgdesc[2];
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u16 tx_flags;
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u8 ahgcount;
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u8 ahgidx;
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};
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struct hfi1_sdma_header {
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__le64 pbc;
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struct hfi1_opa_header hdr;
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} __packed;
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/*
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* hfi1 specific data structures that will be hidden from rvt after the queue
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* pair is made common
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*/
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struct hfi1_qp_priv {
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struct hfi1_ahg_info *s_ahg; /* ahg info for next header */
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struct sdma_engine *s_sde; /* current sde */
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struct send_context *s_sendcontext; /* current sendcontext */
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u8 s_sc; /* SC[0..4] for next packet */
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struct iowait s_iowait;
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struct rvt_qp *owner;
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u8 hdr_type; /* 9B or 16B */
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};
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/*
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* This structure is used to hold commonly lookedup and computed values during
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* the send engine progress.
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*/
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struct hfi1_pkt_state {
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struct hfi1_ibdev *dev;
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struct hfi1_ibport *ibp;
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struct hfi1_pportdata *ppd;
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struct verbs_txreq *s_txreq;
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unsigned long flags;
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unsigned long timeout;
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unsigned long timeout_int;
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int cpu;
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u8 opcode;
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bool in_thread;
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bool pkts_sent;
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};
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#define HFI1_PSN_CREDIT 16
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struct hfi1_opcode_stats {
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u64 n_packets; /* number of packets */
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u64 n_bytes; /* total number of bytes */
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};
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struct hfi1_opcode_stats_perctx {
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struct hfi1_opcode_stats stats[256];
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};
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static inline void inc_opstats(
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u32 tlen,
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struct hfi1_opcode_stats *stats)
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{
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#ifdef CONFIG_DEBUG_FS
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stats->n_bytes += tlen;
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stats->n_packets++;
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#endif
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}
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struct hfi1_ibport {
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struct rvt_qp __rcu *qp[2];
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struct rvt_ibport rvp;
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/* the first 16 entries are sl_to_vl for !OPA */
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u8 sl_to_sc[32];
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u8 sc_to_sl[32];
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};
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struct hfi1_ibdev {
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struct rvt_dev_info rdi; /* Must be first */
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/* QP numbers are shared by all IB ports */
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/* protect txwait list */
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seqlock_t txwait_lock ____cacheline_aligned_in_smp;
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struct list_head txwait; /* list for wait verbs_txreq */
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struct list_head memwait; /* list for wait kernel memory */
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struct kmem_cache *verbs_txreq_cache;
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u64 n_txwait;
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u64 n_kmem_wait;
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/* protect iowait lists */
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seqlock_t iowait_lock ____cacheline_aligned_in_smp;
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u64 n_piowait;
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u64 n_piodrain;
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struct timer_list mem_timer;
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#ifdef CONFIG_DEBUG_FS
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/* per HFI debugfs */
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struct dentry *hfi1_ibdev_dbg;
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/* per HFI symlinks to above */
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struct dentry *hfi1_ibdev_link;
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#ifdef CONFIG_FAULT_INJECTION
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struct fault *fault;
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#endif
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#endif
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};
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static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)
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{
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struct rvt_dev_info *rdi;
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rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
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return container_of(rdi, struct hfi1_ibdev, rdi);
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}
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static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)
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{
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struct hfi1_qp_priv *priv;
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priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);
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return priv->owner;
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}
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/*
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* This must be called with s_lock held.
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*/
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void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,
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u32 qp1, u32 qp2, u32 lid1, u32 lid2);
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void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
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void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);
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void hfi1_node_desc_chg(struct hfi1_ibport *ibp);
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int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
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const struct ib_wc *in_wc, const struct ib_grh *in_grh,
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const struct ib_mad_hdr *in_mad, size_t in_mad_size,
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struct ib_mad_hdr *out_mad, size_t *out_mad_size,
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u16 *out_mad_pkey_index);
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/*
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* The PSN_MASK and PSN_SHIFT allow for
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* 1) comparing two PSNs
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* 2) returning the PSN with any upper bits masked
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* 3) returning the difference between to PSNs
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*
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* The number of significant bits in the PSN must
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* necessarily be at least one bit less than
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* the container holding the PSN.
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*/
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#define PSN_MASK 0x7FFFFFFF
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#define PSN_SHIFT 1
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#define PSN_MODIFY_MASK 0xFFFFFF
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/*
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* Compare two PSNs
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* Returns an integer <, ==, or > than zero.
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*/
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static inline int cmp_psn(u32 a, u32 b)
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{
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return (((int)a) - ((int)b)) << PSN_SHIFT;
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}
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/*
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* Return masked PSN
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*/
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static inline u32 mask_psn(u32 a)
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{
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return a & PSN_MASK;
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}
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/*
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* Return delta between two PSNs
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*/
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static inline u32 delta_psn(u32 a, u32 b)
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{
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return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;
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}
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struct verbs_txreq;
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void hfi1_put_txreq(struct verbs_txreq *tx);
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int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
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void hfi1_copy_sge(struct rvt_sge_state *ss, void *data, u32 length,
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bool release, bool copy_last);
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void hfi1_cnp_rcv(struct hfi1_packet *packet);
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void hfi1_uc_rcv(struct hfi1_packet *packet);
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void hfi1_rc_rcv(struct hfi1_packet *packet);
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void hfi1_rc_hdrerr(
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struct hfi1_ctxtdata *rcd,
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struct hfi1_packet *packet,
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struct rvt_qp *qp);
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u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
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void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);
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void hfi1_ud_rcv(struct hfi1_packet *packet);
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int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);
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void hfi1_migrate_qp(struct rvt_qp *qp);
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int hfi1_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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void hfi1_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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void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
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int hfi1_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
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extern const u32 rc_only_opcode;
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extern const u32 uc_only_opcode;
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int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);
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u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,
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const struct ib_global_route *grh, u32 hwords, u32 nwords);
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void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
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u32 bth0, u32 bth2, int middle,
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struct hfi1_pkt_state *ps);
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void _hfi1_do_send(struct work_struct *work);
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void hfi1_do_send_from_rvt(struct rvt_qp *qp);
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void hfi1_do_send(struct rvt_qp *qp, bool in_thread);
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void hfi1_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
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enum ib_wc_status status);
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void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);
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int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
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int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
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int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);
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int hfi1_register_ib_device(struct hfi1_devdata *);
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void hfi1_unregister_ib_device(struct hfi1_devdata *);
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void hfi1_ib_rcv(struct hfi1_packet *packet);
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void hfi1_16B_rcv(struct hfi1_packet *packet);
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unsigned hfi1_get_npkeys(struct hfi1_devdata *);
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int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
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u64 pbc);
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int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,
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u64 pbc);
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int hfi1_wss_init(void);
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void hfi1_wss_exit(void);
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/* platform specific: return the lowest level cache (llc) size, in KiB */
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static inline int wss_llc_size(void)
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{
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/* assume that the boot CPU value is universal for all CPUs */
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return boot_cpu_data.x86_cache_size;
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}
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/* platform specific: cacheless copy */
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static inline void cacheless_memcpy(void *dst, void *src, size_t n)
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{
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/*
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* Use the only available X64 cacheless copy. Add a __user cast
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* to quiet sparse. The src agument is already in the kernel so
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* there are no security issues. The extra fault recovery machinery
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* is not invoked.
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*/
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__copy_user_nocache(dst, (void __user *)src, n, 0);
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}
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static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)
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{
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return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);
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}
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extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];
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extern const u8 hdr_len_by_opcode[];
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extern const int ib_rvt_state_ops[];
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extern __be64 ib_hfi1_sys_image_guid; /* in network order */
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extern unsigned int hfi1_max_cqes;
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extern unsigned int hfi1_max_cqs;
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extern unsigned int hfi1_max_qp_wrs;
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extern unsigned int hfi1_max_qps;
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extern unsigned int hfi1_max_sges;
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extern unsigned int hfi1_max_mcast_grps;
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extern unsigned int hfi1_max_mcast_qp_attached;
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extern unsigned int hfi1_max_srqs;
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extern unsigned int hfi1_max_srq_sges;
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extern unsigned int hfi1_max_srq_wrs;
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extern unsigned short piothreshold;
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extern const u32 ib_hfi1_rnr_table[];
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#endif /* HFI1_VERBS_H */
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