From patchwork Mon Dec 7 20:45:24 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dennis Dalessandro X-Patchwork-Id: 7790081 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 2C6FFBEEE1 for ; Mon, 7 Dec 2015 20:45:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2513D204EB for ; Mon, 7 Dec 2015 20:45:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ADD30204B5 for ; Mon, 7 Dec 2015 20:45:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932941AbbLGUp3 (ORCPT ); Mon, 7 Dec 2015 15:45:29 -0500 Received: from mga09.intel.com ([134.134.136.24]:44084 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932910AbbLGUp0 (ORCPT ); Mon, 7 Dec 2015 15:45:26 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP; 07 Dec 2015 12:45:25 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,396,1444719600"; d="scan'208";a="836238519" Received: from sedona.ch.intel.com ([143.182.228.65]) by orsmga001.jf.intel.com with ESMTP; 07 Dec 2015 12:45:25 -0800 Received: from phlsvsles11.ph.intel.com (phlsvsles11.ph.intel.com [10.228.195.43]) by sedona.ch.intel.com (8.13.6/8.14.3/Standard MailSET/Hub) with ESMTP id tB7KjOQV028446; Mon, 7 Dec 2015 13:45:25 -0700 Received: from phlsvslse11.ph.intel.com (localhost [127.0.0.1]) by phlsvsles11.ph.intel.com with ESMTP id tB7KjOYW011069; Mon, 7 Dec 2015 15:45:24 -0500 Subject: [PATCH 33/37] IB/rdmavt: Break rdma_vt main include header file up To: dledford@redhat.com From: Dennis Dalessandro Cc: linux-rdma@vger.kernel.org, Mike Marciniszyn , Ira Weiny Date: Mon, 07 Dec 2015 15:45:24 -0500 Message-ID: <20151207204523.8144.77625.stgit@phlsvslse11.ph.intel.com> In-Reply-To: <20151207204046.8144.18752.stgit@phlsvslse11.ph.intel.com> References: <20151207204046.8144.18752.stgit@phlsvslse11.ph.intel.com> User-Agent: StGit/0.16 MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Until all functionality is moved over to rdmavt drivers still need to access a number of fields in data structures that are predominantly meant to be used by rdmavt. Once these rdmavt_.h header files are no longer being touched by drivers their content should be moved to rdmavt/.h. While here move a couple #defines over to more general IB verbs header files because they fit better. Reviewed-by: Ira Weiny Reviewed-by: Mike Marciniszyn Signed-off-by: Dennis Dalessandro --- drivers/infiniband/sw/rdmavt/ah.c | 4 include/rdma/ib_verbs.h | 1 include/rdma/rdma_vt.h | 309 ------------------------------------- include/rdma/rdmavt_mr.h | 133 ++++++++++++++++ include/rdma/rdmavt_qp.h | 265 ++++++++++++++++++++++++++++++++ 5 files changed, 404 insertions(+), 308 deletions(-) create mode 100644 include/rdma/rdmavt_mr.h create mode 100644 include/rdma/rdmavt_qp.h -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/infiniband/sw/rdmavt/ah.c b/drivers/infiniband/sw/rdmavt/ah.c index 982c2ae..70376c2 100644 --- a/drivers/infiniband/sw/rdmavt/ah.c +++ b/drivers/infiniband/sw/rdmavt/ah.c @@ -81,8 +81,8 @@ int rvt_check_ah(struct ib_device *ibdev, if (link != IB_LINK_LAYER_ETHERNET) { if (ah_attr->dlid == 0) return -EINVAL; - if (ah_attr->dlid >= RVT_MULTICAST_LID_BASE && - ah_attr->dlid != RVT_PERMISSIVE_LID && + if (ah_attr->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE) && + ah_attr->dlid != be16_to_cpu(IB_LID_PERMISSIVE) && !(ah_attr->ah_flags & IB_AH_GRH)) return -EINVAL; } diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 9a68a19..c8c7be0 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -524,6 +524,7 @@ enum { }; #define IB_LID_PERMISSIVE cpu_to_be16(0xFFFF) +#define IB_MULTICAST_LID_BASE cpu_to_be16(0xC000) enum ib_ah_flags { IB_AH_GRH = 1 diff --git a/include/rdma/rdma_vt.h b/include/rdma/rdma_vt.h index f75e7c7..ac5222c 100644 --- a/include/rdma/rdma_vt.h +++ b/include/rdma/rdma_vt.h @@ -58,10 +58,9 @@ #include #include -#include "ib_verbs.h" - -#define RVT_MULTICAST_LID_BASE 0xC000 -#define RVT_PERMISSIVE_LID 0xFFFF +#include +#include +#include /* * For some of the IBTA objects there will likely be some @@ -73,297 +72,6 @@ #define RVT_FLAG_QP_INIT_DRIVER BIT(2) #define RVT_FLAG_CQ_INIT_DRIVER BIT(3) -/* - * For Memory Regions. This stuff should probably be moved into rdmavt/mr.h once - * drivers no longer need access to the MR directly. - */ - -/* - * A segment is a linear region of low physical memory. - * Used by the verbs layer. - */ -struct rvt_seg { - void *vaddr; - size_t length; -}; - -/* The number of rvt_segs that fit in a page. */ -#define RVT_SEGSZ (PAGE_SIZE / sizeof(struct rvt_seg)) - -struct rvt_segarray { - struct rvt_seg segs[RVT_SEGSZ]; -}; - -struct rvt_mregion { - struct ib_pd *pd; /* shares refcnt of ibmr.pd */ - u64 user_base; /* User's address for this region */ - u64 iova; /* IB start address of this region */ - size_t length; - u32 lkey; - u32 offset; /* offset (bytes) to start of region */ - int access_flags; - u32 max_segs; /* number of rvt_segs in all the arrays */ - u32 mapsz; /* size of the map array */ - u8 page_shift; /* 0 - non unform/non powerof2 sizes */ - u8 lkey_published; /* in global table */ - struct completion comp; /* complete when refcount goes to zero */ - atomic_t refcount; - struct rvt_segarray *map[0]; /* the segments */ -}; - -#define RVT_MAX_LKEY_TABLE_BITS 23 - -struct rvt_lkey_table { - spinlock_t lock; /* protect changes in this struct */ - u32 next; /* next unused index (speeds search) */ - u32 gen; /* generation count */ - u32 max; /* size of the table */ - struct rvt_mregion __rcu **table; -}; - -/* End Memmory Region */ - -/* - * Things needed for the Queue Pair definition. Like the MR stuff above the - * following should probably get moved to qp.h once drivers stop trying to make - * and manipulate thier own QPs. For the few instnaces where a driver may need - * to look into a queue pair there should be a pointer to a driver priavte data - * structure that they can look at. - */ - -/* - * These keep track of the copy progress within a memory region. - * Used by the verbs layer. - */ -struct rvt_sge { - struct rvt_mregion *mr; - void *vaddr; /* kernel virtual address of segment */ - u32 sge_length; /* length of the SGE */ - u32 length; /* remaining length of the segment */ - u16 m; /* current index: mr->map[m] */ - u16 n; /* current index: mr->map[m]->segs[n] */ -}; - -/* - * Send work request queue entry. - * The size of the sg_list is determined when the QP is created and stored - * in qp->s_max_sge. - */ -struct rvt_swqe { - union { - struct ib_send_wr wr; /* don't use wr.sg_list */ - struct ib_ud_wr ud_wr; - struct ib_reg_wr reg_wr; - struct ib_rdma_wr rdma_wr; - struct ib_atomic_wr atomic_wr; - }; - u32 psn; /* first packet sequence number */ - u32 lpsn; /* last packet sequence number */ - u32 ssn; /* send sequence number */ - u32 length; /* total length of data in sg_list */ - struct rvt_sge sg_list[0]; -}; - -/* - * Receive work request queue entry. - * The size of the sg_list is determined when the QP (or SRQ) is created - * and stored in qp->r_rq.max_sge (or srq->rq.max_sge). - */ -struct rvt_rwqe { - u64 wr_id; - u8 num_sge; - struct ib_sge sg_list[0]; -}; - -/* - * This structure is used to contain the head pointer, tail pointer, - * and receive work queue entries as a single memory allocation so - * it can be mmap'ed into user space. - * Note that the wq array elements are variable size so you can't - * just index into the array to get the N'th element; - * use get_rwqe_ptr() instead. - */ -struct rvt_rwq { - u32 head; /* new work requests posted to the head */ - u32 tail; /* receives pull requests from here. */ - struct rvt_rwqe wq[0]; -}; - -struct rvt_rq { - struct rvt_rwq *wq; - u32 size; /* size of RWQE array */ - u8 max_sge; - /* protect changes in this struct */ - spinlock_t lock ____cacheline_aligned_in_smp; -}; - -/* - * This structure is used by rvt_mmap() to validate an offset - * when an mmap() request is made. The vm_area_struct then uses - * this as its vm_private_data. - */ -struct rvt_mmap_info { - struct list_head pending_mmaps; - struct ib_ucontext *context; - void *obj; - __u64 offset; - struct kref ref; - unsigned size; -}; - -#define RVT_MAX_RDMA_ATOMIC 16 - -/* - * This structure holds the information that the send tasklet needs - * to send a RDMA read response or atomic operation. - */ -struct rvt_ack_entry { - u8 opcode; - u8 sent; - u32 psn; - u32 lpsn; - union { - struct rvt_sge rdma_sge; - u64 atomic_data; - }; -}; - -struct rvt_sge_state { - struct rvt_sge *sg_list; /* next SGE to be used if any */ - struct rvt_sge sge; /* progress state for the current SGE */ - u32 total_len; - u8 num_sge; -}; - -/* - * Variables prefixed with s_ are for the requester (sender). - * Variables prefixed with r_ are for the responder (receiver). - * Variables prefixed with ack_ are for responder replies. - * - * Common variables are protected by both r_rq.lock and s_lock in that order - * which only happens in modify_qp() or changing the QP 'state'. - */ -struct rvt_qp { - struct ib_qp ibqp; - void *priv; /* Driver private data */ - /* read mostly fields above and below */ - struct ib_ah_attr remote_ah_attr; - struct ib_ah_attr alt_ah_attr; - struct rvt_qp __rcu *next; /* link list for QPN hash table */ - struct rvt_swqe *s_wq; /* send work queue */ - struct rvt_mmap_info *ip; - - unsigned long timeout_jiffies; /* computed from timeout */ - - enum ib_mtu path_mtu; - int srate_mbps; /* s_srate (below) converted to Mbit/s */ - u32 remote_qpn; - u32 pmtu; /* decoded from path_mtu */ - u32 qkey; /* QKEY for this QP (for UD or RD) */ - u32 s_size; /* send work queue size */ - u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */ - u32 s_ahgpsn; /* set to the psn in the copy of the header */ - - u8 state; /* QP state */ - u8 allowed_ops; /* high order bits of allowed opcodes */ - u8 qp_access_flags; - u8 alt_timeout; /* Alternate path timeout for this QP */ - u8 timeout; /* Timeout for this QP */ - u8 s_srate; - u8 s_mig_state; - u8 port_num; - u8 s_pkey_index; /* PKEY index to use */ - u8 s_alt_pkey_index; /* Alternate path PKEY index to use */ - u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */ - u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */ - u8 s_retry_cnt; /* number of times to retry */ - u8 s_rnr_retry_cnt; - u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */ - u8 s_max_sge; /* size of s_wq->sg_list */ - u8 s_draining; - - /* start of read/write fields */ - atomic_t refcount ____cacheline_aligned_in_smp; - wait_queue_head_t wait; - - struct rvt_ack_entry s_ack_queue[RVT_MAX_RDMA_ATOMIC + 1] - ____cacheline_aligned_in_smp; - struct rvt_sge_state s_rdma_read_sge; - - spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */ - unsigned long r_aflags; - u64 r_wr_id; /* ID for current receive WQE */ - u32 r_ack_psn; /* PSN for next ACK or atomic ACK */ - u32 r_len; /* total length of r_sge */ - u32 r_rcv_len; /* receive data len processed */ - u32 r_psn; /* expected rcv packet sequence number */ - u32 r_msn; /* message sequence number */ - - u8 r_state; /* opcode of last packet received */ - u8 r_flags; - u8 r_head_ack_queue; /* index into s_ack_queue[] */ - - struct list_head rspwait; /* link for waiting to respond */ - - struct rvt_sge_state r_sge; /* current receive data */ - struct rvt_rq r_rq; /* receive work queue */ - - spinlock_t s_lock ____cacheline_aligned_in_smp; - struct rvt_sge_state *s_cur_sge; - u32 s_flags; - struct rvt_swqe *s_wqe; - struct rvt_sge_state s_sge; /* current send request data */ - struct rvt_mregion *s_rdma_mr; - struct sdma_engine *s_sde; /* current sde */ - u32 s_cur_size; /* size of send packet in bytes */ - u32 s_len; /* total length of s_sge */ - u32 s_rdma_read_len; /* total length of s_rdma_read_sge */ - u32 s_next_psn; /* PSN for next request */ - u32 s_last_psn; /* last response PSN processed */ - u32 s_sending_psn; /* lowest PSN that is being sent */ - u32 s_sending_hpsn; /* highest PSN that is being sent */ - u32 s_psn; /* current packet sequence number */ - u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */ - u32 s_ack_psn; /* PSN for acking sends and RDMA writes */ - u32 s_head; /* new entries added here */ - u32 s_tail; /* next entry to process */ - u32 s_cur; /* current work queue entry */ - u32 s_acked; /* last un-ACK'ed entry */ - u32 s_last; /* last completed entry */ - u32 s_ssn; /* SSN of tail entry */ - u32 s_lsn; /* limit sequence number (credit) */ - u16 s_hdrwords; /* size of s_hdr in 32 bit words */ - u16 s_rdma_ack_cnt; - s8 s_ahgidx; - u8 s_state; /* opcode of last packet sent */ - u8 s_ack_state; /* opcode of packet to ACK */ - u8 s_nak_state; /* non-zero if NAK is pending */ - u8 r_nak_state; /* non-zero if NAK is pending */ - u8 s_retry; /* requester retry counter */ - u8 s_rnr_retry; /* requester RNR retry counter */ - u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */ - u8 s_tail_ack_queue; /* index into s_ack_queue[] */ - - struct rvt_sge_state s_ack_rdma_sge; - struct timer_list s_timer; - - /* - * This sge list MUST be last. Do not add anything below here. - */ - struct rvt_sge r_sg_list[0] /* verified SGEs */ - ____cacheline_aligned_in_smp; -}; - -struct rvt_srq { - struct ib_srq ibsrq; - struct rvt_rq rq; - struct rvt_mmap_info *ip; - /* send signal when number of RWQEs < limit */ - u32 limit; -}; - -/* End QP section */ - struct rvt_ibport { struct rvt_qp __rcu *qp[2]; struct ib_mad_agent *send_agent; /* agent for SMI (traps) */ @@ -560,17 +268,6 @@ static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev) return container_of(ibdev, struct rvt_dev_info, ibdev); } -static inline void rvt_put_mr(struct rvt_mregion *mr) -{ - if (unlikely(atomic_dec_and_test(&mr->refcount))) - complete(&mr->comp); -} - -static inline void rvt_get_mr(struct rvt_mregion *mr) -{ - atomic_inc(&mr->refcount); -} - static inline struct rvt_srq *ibsrq_to_rvtsrq(struct ib_srq *ibsrq) { return container_of(ibsrq, struct rvt_srq, ibsrq); diff --git a/include/rdma/rdmavt_mr.h b/include/rdma/rdmavt_mr.h new file mode 100644 index 0000000..22d0324 --- /dev/null +++ b/include/rdma/rdmavt_mr.h @@ -0,0 +1,133 @@ +#ifndef DEF_RDMAVT_INCMR_H +#define DEF_RDMAVT_INCMR_H + +/* + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2015 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +/* + * For Memory Regions. This stuff should probably be moved into rdmavt/mr.h once + * drivers no longer need access to the MR directly. + */ + +/* + * A segment is a linear region of low physical memory. + * Used by the verbs layer. + */ +struct rvt_seg { + void *vaddr; + size_t length; +}; + +/* The number of rvt_segs that fit in a page. */ +#define RVT_SEGSZ (PAGE_SIZE / sizeof(struct rvt_seg)) + +struct rvt_segarray { + struct rvt_seg segs[RVT_SEGSZ]; +}; + +struct rvt_mregion { + struct ib_pd *pd; /* shares refcnt of ibmr.pd */ + u64 user_base; /* User's address for this region */ + u64 iova; /* IB start address of this region */ + size_t length; + u32 lkey; + u32 offset; /* offset (bytes) to start of region */ + int access_flags; + u32 max_segs; /* number of rvt_segs in all the arrays */ + u32 mapsz; /* size of the map array */ + u8 page_shift; /* 0 - non unform/non powerof2 sizes */ + u8 lkey_published; /* in global table */ + struct completion comp; /* complete when refcount goes to zero */ + atomic_t refcount; + struct rvt_segarray *map[0]; /* the segments */ +}; + +#define RVT_MAX_LKEY_TABLE_BITS 23 + +struct rvt_lkey_table { + spinlock_t lock; /* protect changes in this struct */ + u32 next; /* next unused index (speeds search) */ + u32 gen; /* generation count */ + u32 max; /* size of the table */ + struct rvt_mregion __rcu **table; +}; + +/* + * These keep track of the copy progress within a memory region. + * Used by the verbs layer. + */ +struct rvt_sge { + struct rvt_mregion *mr; + void *vaddr; /* kernel virtual address of segment */ + u32 sge_length; /* length of the SGE */ + u32 length; /* remaining length of the segment */ + u16 m; /* current index: mr->map[m] */ + u16 n; /* current index: mr->map[m]->segs[n] */ +}; + +struct rvt_sge_state { + struct rvt_sge *sg_list; /* next SGE to be used if any */ + struct rvt_sge sge; /* progress state for the current SGE */ + u32 total_len; + u8 num_sge; +}; + +static inline void rvt_put_mr(struct rvt_mregion *mr) +{ + if (unlikely(atomic_dec_and_test(&mr->refcount))) + complete(&mr->comp); +} + +static inline void rvt_get_mr(struct rvt_mregion *mr) +{ + atomic_inc(&mr->refcount); +} + +#endif /* DEF_RDMAVT_INCMRH */ diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h new file mode 100644 index 0000000..9d4444f --- /dev/null +++ b/include/rdma/rdmavt_qp.h @@ -0,0 +1,265 @@ +#ifndef DEF_RDMAVT_INCQP_H +#define DEF_RDMAVT_INCQP_H + +/* + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2015 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +/* + * Send work request queue entry. + * The size of the sg_list is determined when the QP is created and stored + * in qp->s_max_sge. + */ +struct rvt_swqe { + union { + struct ib_send_wr wr; /* don't use wr.sg_list */ + struct ib_ud_wr ud_wr; + struct ib_reg_wr reg_wr; + struct ib_rdma_wr rdma_wr; + struct ib_atomic_wr atomic_wr; + }; + u32 psn; /* first packet sequence number */ + u32 lpsn; /* last packet sequence number */ + u32 ssn; /* send sequence number */ + u32 length; /* total length of data in sg_list */ + struct rvt_sge sg_list[0]; +}; + +/* + * Receive work request queue entry. + * The size of the sg_list is determined when the QP (or SRQ) is created + * and stored in qp->r_rq.max_sge (or srq->rq.max_sge). + */ +struct rvt_rwqe { + u64 wr_id; + u8 num_sge; + struct ib_sge sg_list[0]; +}; + +/* + * This structure is used to contain the head pointer, tail pointer, + * and receive work queue entries as a single memory allocation so + * it can be mmap'ed into user space. + * Note that the wq array elements are variable size so you can't + * just index into the array to get the N'th element; + * use get_rwqe_ptr() instead. + */ +struct rvt_rwq { + u32 head; /* new work requests posted to the head */ + u32 tail; /* receives pull requests from here. */ + struct rvt_rwqe wq[0]; +}; + +struct rvt_rq { + struct rvt_rwq *wq; + u32 size; /* size of RWQE array */ + u8 max_sge; + /* protect changes in this struct */ + spinlock_t lock ____cacheline_aligned_in_smp; +}; + +/* + * This structure is used by rvt_mmap() to validate an offset + * when an mmap() request is made. The vm_area_struct then uses + * this as its vm_private_data. + */ +struct rvt_mmap_info { + struct list_head pending_mmaps; + struct ib_ucontext *context; + void *obj; + __u64 offset; + struct kref ref; + unsigned size; +}; + +#define RVT_MAX_RDMA_ATOMIC 16 + +/* + * This structure holds the information that the send tasklet needs + * to send a RDMA read response or atomic operation. + */ +struct rvt_ack_entry { + u8 opcode; + u8 sent; + u32 psn; + u32 lpsn; + union { + struct rvt_sge rdma_sge; + u64 atomic_data; + }; +}; + +/* + * Variables prefixed with s_ are for the requester (sender). + * Variables prefixed with r_ are for the responder (receiver). + * Variables prefixed with ack_ are for responder replies. + * + * Common variables are protected by both r_rq.lock and s_lock in that order + * which only happens in modify_qp() or changing the QP 'state'. + */ +struct rvt_qp { + struct ib_qp ibqp; + void *priv; /* Driver private data */ + /* read mostly fields above and below */ + struct ib_ah_attr remote_ah_attr; + struct ib_ah_attr alt_ah_attr; + struct rvt_qp __rcu *next; /* link list for QPN hash table */ + struct rvt_swqe *s_wq; /* send work queue */ + struct rvt_mmap_info *ip; + + unsigned long timeout_jiffies; /* computed from timeout */ + + enum ib_mtu path_mtu; + int srate_mbps; /* s_srate (below) converted to Mbit/s */ + u32 remote_qpn; + u32 pmtu; /* decoded from path_mtu */ + u32 qkey; /* QKEY for this QP (for UD or RD) */ + u32 s_size; /* send work queue size */ + u32 s_rnr_timeout; /* number of milliseconds for RNR timeout */ + u32 s_ahgpsn; /* set to the psn in the copy of the header */ + + u8 state; /* QP state */ + u8 allowed_ops; /* high order bits of allowed opcodes */ + u8 qp_access_flags; + u8 alt_timeout; /* Alternate path timeout for this QP */ + u8 timeout; /* Timeout for this QP */ + u8 s_srate; + u8 s_mig_state; + u8 port_num; + u8 s_pkey_index; /* PKEY index to use */ + u8 s_alt_pkey_index; /* Alternate path PKEY index to use */ + u8 r_max_rd_atomic; /* max number of RDMA read/atomic to receive */ + u8 s_max_rd_atomic; /* max number of RDMA read/atomic to send */ + u8 s_retry_cnt; /* number of times to retry */ + u8 s_rnr_retry_cnt; + u8 r_min_rnr_timer; /* retry timeout value for RNR NAKs */ + u8 s_max_sge; /* size of s_wq->sg_list */ + u8 s_draining; + + /* start of read/write fields */ + atomic_t refcount ____cacheline_aligned_in_smp; + wait_queue_head_t wait; + + struct rvt_ack_entry s_ack_queue[RVT_MAX_RDMA_ATOMIC + 1] + ____cacheline_aligned_in_smp; + struct rvt_sge_state s_rdma_read_sge; + + spinlock_t r_lock ____cacheline_aligned_in_smp; /* used for APM */ + unsigned long r_aflags; + u64 r_wr_id; /* ID for current receive WQE */ + u32 r_ack_psn; /* PSN for next ACK or atomic ACK */ + u32 r_len; /* total length of r_sge */ + u32 r_rcv_len; /* receive data len processed */ + u32 r_psn; /* expected rcv packet sequence number */ + u32 r_msn; /* message sequence number */ + + u8 r_state; /* opcode of last packet received */ + u8 r_flags; + u8 r_head_ack_queue; /* index into s_ack_queue[] */ + + struct list_head rspwait; /* link for waiting to respond */ + + struct rvt_sge_state r_sge; /* current receive data */ + struct rvt_rq r_rq; /* receive work queue */ + + spinlock_t s_lock ____cacheline_aligned_in_smp; + struct rvt_sge_state *s_cur_sge; + u32 s_flags; + struct rvt_swqe *s_wqe; + struct rvt_sge_state s_sge; /* current send request data */ + struct rvt_mregion *s_rdma_mr; + struct sdma_engine *s_sde; /* current sde */ + u32 s_cur_size; /* size of send packet in bytes */ + u32 s_len; /* total length of s_sge */ + u32 s_rdma_read_len; /* total length of s_rdma_read_sge */ + u32 s_next_psn; /* PSN for next request */ + u32 s_last_psn; /* last response PSN processed */ + u32 s_sending_psn; /* lowest PSN that is being sent */ + u32 s_sending_hpsn; /* highest PSN that is being sent */ + u32 s_psn; /* current packet sequence number */ + u32 s_ack_rdma_psn; /* PSN for sending RDMA read responses */ + u32 s_ack_psn; /* PSN for acking sends and RDMA writes */ + u32 s_head; /* new entries added here */ + u32 s_tail; /* next entry to process */ + u32 s_cur; /* current work queue entry */ + u32 s_acked; /* last un-ACK'ed entry */ + u32 s_last; /* last completed entry */ + u32 s_ssn; /* SSN of tail entry */ + u32 s_lsn; /* limit sequence number (credit) */ + u16 s_hdrwords; /* size of s_hdr in 32 bit words */ + u16 s_rdma_ack_cnt; + s8 s_ahgidx; + u8 s_state; /* opcode of last packet sent */ + u8 s_ack_state; /* opcode of packet to ACK */ + u8 s_nak_state; /* non-zero if NAK is pending */ + u8 r_nak_state; /* non-zero if NAK is pending */ + u8 s_retry; /* requester retry counter */ + u8 s_rnr_retry; /* requester RNR retry counter */ + u8 s_num_rd_atomic; /* number of RDMA read/atomic pending */ + u8 s_tail_ack_queue; /* index into s_ack_queue[] */ + + struct rvt_sge_state s_ack_rdma_sge; + struct timer_list s_timer; + + /* + * This sge list MUST be last. Do not add anything below here. + */ + struct rvt_sge r_sg_list[0] /* verified SGEs */ + ____cacheline_aligned_in_smp; +}; + +struct rvt_srq { + struct ib_srq ibsrq; + struct rvt_rq rq; + struct rvt_mmap_info *ip; + /* send signal when number of RWQEs < limit */ + u32 limit; +}; + +#endif /* DEF_RDMAVT_INCQP_H */