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![Jianxin Xiong](/assets/img/avatar_default.png)
This fixes the following warning with PROV_LOCKING enabled kernel: INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 15 PID: 12286 Comm: modprobe Not tainted 4.7.0-rc5.prove_rcu+ #1 Hardware name: Intel Corporation S2600WT2R/S2600WT2R, ...... Call Trace: [<ffffffff8139ec0d>] dump_stack+0x85/0xc8 [<ffffffff810eb765>] register_lock_class+0x415/0x4b0 [<ffffffff810ede1c>] ? __lock_acquire+0x40c/0x1960 [<ffffffff810edaa9>] __lock_acquire+0x99/0x1960 [<ffffffff8120ab62>] ? find_vmap_area+0x42/0x60 [<ffffffff8120ab39>] ? find_vmap_area+0x19/0x60 [<ffffffff810ef9d3>] lock_acquire+0xd3/0x200 [<ffffffffa049d598>] ? rvt_create_cq+0xc8/0x250 [rdmavt] [<ffffffff81763391>] _raw_spin_lock+0x31/0x40 [<ffffffffa049d598>] ? rvt_create_cq+0xc8/0x250 [rdmavt] [<ffffffffa049d598>] rvt_create_cq+0xc8/0x250 [rdmavt] [<ffffffff810ead46>] ? static_obj+0x36/0x50 [<ffffffffa0469e39>] ib_alloc_cq+0x49/0x180 [ib_core] [<ffffffffa047bed4>] ib_mad_init_device+0x204/0x6d0 [ib_core] [<ffffffff810e968f>] ? up_write+0x1f/0x40 [<ffffffffa046e2c0>] ib_register_device+0x3d0/0x510 [ib_core] [<ffffffffa0752410>] ? read_cc_setting_bin+0x200/0x200 [hfi1] [<ffffffff810ead46>] ? static_obj+0x36/0x50 [<ffffffff810eb888>] ? lockdep_init_map+0x88/0x200 [<ffffffffa049cbff>] rvt_register_device+0x17f/0x320 [rdmavt] [<ffffffffa0766caa>] hfi1_register_ib_device+0x6ca/0x7c0 [hfi1] [<ffffffffa0733de4>] init_one+0x2b4/0x430 [hfi1] [<ffffffff813e40a5>] local_pci_probe+0x45/0xa0 [<ffffffff813e5110>] ? pci_match_device+0xe0/0x110 [<ffffffff813e550c>] pci_device_probe+0xfc/0x140 [<ffffffff814daee9>] driver_probe_device+0x239/0x460 [<ffffffff814db1dd>] __driver_attach+0xcd/0xf0 [<ffffffff814db110>] ? driver_probe_device+0x460/0x460 [<ffffffff814d89b3>] bus_for_each_dev+0x73/0xc0 [<ffffffff814da74e>] driver_attach+0x1e/0x20 [<ffffffff814da1b3>] bus_add_driver+0x1d3/0x290 [<ffffffffa04cc114>] ? dev_init+0x114/0x114 [hfi1] [<ffffffff814dbf60>] driver_register+0x60/0xe0 [<ffffffffa04cc114>] ? dev_init+0x114/0x114 [hfi1] [<ffffffff813e39d0>] __pci_register_driver+0x60/0x70 [<ffffffffa04cc2aa>] hfi1_mod_init+0x196/0x1fe [hfi1] [<ffffffff81002190>] do_one_initcall+0x50/0x190 [<ffffffff8110be72>] ? rcu_read_lock_sched_held+0x62/0x70 [<ffffffff8122d4aa>] ? kmem_cache_alloc_trace+0x23a/0x2a0 [<ffffffff811c1881>] ? do_init_module+0x27/0x1dc [<ffffffff811c18ba>] do_init_module+0x60/0x1dc [<ffffffff811360cc>] load_module+0x132c/0x1ac0 [<ffffffff81132c40>] ? __symbol_put+0x60/0x60 [<ffffffff8133e50d>] ? ima_post_read_file+0x3d/0x80 Cc: Stable <stable@vger.kernel.org> # 4.6+ Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
553 lines
14 KiB
C
553 lines
14 KiB
C
/*
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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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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/kthread.h>
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#include "cq.h"
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#include "vt.h"
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/**
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* rvt_cq_enter - add a new entry to the completion queue
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* @cq: completion queue
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* @entry: work completion entry to add
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* @sig: true if @entry is solicited
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*
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* This may be called with qp->s_lock held.
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*/
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void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited)
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{
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struct rvt_cq_wc *wc;
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unsigned long flags;
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u32 head;
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u32 next;
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spin_lock_irqsave(&cq->lock, flags);
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/*
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* Note that the head pointer might be writable by user processes.
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* Take care to verify it is a sane value.
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*/
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wc = cq->queue;
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head = wc->head;
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if (head >= (unsigned)cq->ibcq.cqe) {
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head = cq->ibcq.cqe;
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next = 0;
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} else {
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next = head + 1;
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}
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if (unlikely(next == wc->tail)) {
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spin_unlock_irqrestore(&cq->lock, flags);
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if (cq->ibcq.event_handler) {
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struct ib_event ev;
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ev.device = cq->ibcq.device;
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ev.element.cq = &cq->ibcq;
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ev.event = IB_EVENT_CQ_ERR;
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cq->ibcq.event_handler(&ev, cq->ibcq.cq_context);
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}
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return;
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}
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if (cq->ip) {
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wc->uqueue[head].wr_id = entry->wr_id;
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wc->uqueue[head].status = entry->status;
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wc->uqueue[head].opcode = entry->opcode;
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wc->uqueue[head].vendor_err = entry->vendor_err;
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wc->uqueue[head].byte_len = entry->byte_len;
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wc->uqueue[head].ex.imm_data =
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(__u32 __force)entry->ex.imm_data;
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wc->uqueue[head].qp_num = entry->qp->qp_num;
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wc->uqueue[head].src_qp = entry->src_qp;
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wc->uqueue[head].wc_flags = entry->wc_flags;
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wc->uqueue[head].pkey_index = entry->pkey_index;
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wc->uqueue[head].slid = entry->slid;
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wc->uqueue[head].sl = entry->sl;
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wc->uqueue[head].dlid_path_bits = entry->dlid_path_bits;
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wc->uqueue[head].port_num = entry->port_num;
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/* Make sure entry is written before the head index. */
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smp_wmb();
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} else {
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wc->kqueue[head] = *entry;
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}
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wc->head = next;
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if (cq->notify == IB_CQ_NEXT_COMP ||
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(cq->notify == IB_CQ_SOLICITED &&
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(solicited || entry->status != IB_WC_SUCCESS))) {
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struct kthread_worker *worker;
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/*
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* This will cause send_complete() to be called in
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* another thread.
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*/
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smp_read_barrier_depends(); /* see rvt_cq_exit */
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worker = cq->rdi->worker;
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if (likely(worker)) {
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cq->notify = RVT_CQ_NONE;
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cq->triggered++;
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queue_kthread_work(worker, &cq->comptask);
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}
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}
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spin_unlock_irqrestore(&cq->lock, flags);
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}
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EXPORT_SYMBOL(rvt_cq_enter);
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static void send_complete(struct kthread_work *work)
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{
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struct rvt_cq *cq = container_of(work, struct rvt_cq, comptask);
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/*
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* The completion handler will most likely rearm the notification
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* and poll for all pending entries. If a new completion entry
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* is added while we are in this routine, queue_work()
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* won't call us again until we return so we check triggered to
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* see if we need to call the handler again.
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*/
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for (;;) {
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u8 triggered = cq->triggered;
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/*
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* IPoIB connected mode assumes the callback is from a
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* soft IRQ. We simulate this by blocking "bottom halves".
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* See the implementation for ipoib_cm_handle_tx_wc(),
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* netif_tx_lock_bh() and netif_tx_lock().
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*/
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local_bh_disable();
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cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
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local_bh_enable();
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if (cq->triggered == triggered)
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return;
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}
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}
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/**
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* rvt_create_cq - create a completion queue
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* @ibdev: the device this completion queue is attached to
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* @attr: creation attributes
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* @context: unused by the QLogic_IB driver
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* @udata: user data for libibverbs.so
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*
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* Called by ib_create_cq() in the generic verbs code.
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*
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* Return: pointer to the completion queue or negative errno values
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* for failure.
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*/
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struct ib_cq *rvt_create_cq(struct ib_device *ibdev,
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const struct ib_cq_init_attr *attr,
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struct ib_ucontext *context,
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struct ib_udata *udata)
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{
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struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
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struct rvt_cq *cq;
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struct rvt_cq_wc *wc;
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struct ib_cq *ret;
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u32 sz;
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unsigned int entries = attr->cqe;
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if (attr->flags)
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return ERR_PTR(-EINVAL);
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if (entries < 1 || entries > rdi->dparms.props.max_cqe)
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return ERR_PTR(-EINVAL);
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/* Allocate the completion queue structure. */
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cq = kzalloc(sizeof(*cq), GFP_KERNEL);
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if (!cq)
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return ERR_PTR(-ENOMEM);
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/*
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* Allocate the completion queue entries and head/tail pointers.
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* This is allocated separately so that it can be resized and
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* also mapped into user space.
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* We need to use vmalloc() in order to support mmap and large
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* numbers of entries.
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*/
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sz = sizeof(*wc);
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if (udata && udata->outlen >= sizeof(__u64))
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sz += sizeof(struct ib_uverbs_wc) * (entries + 1);
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else
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sz += sizeof(struct ib_wc) * (entries + 1);
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wc = vmalloc_user(sz);
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if (!wc) {
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ret = ERR_PTR(-ENOMEM);
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goto bail_cq;
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}
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/*
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* Return the address of the WC as the offset to mmap.
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* See rvt_mmap() for details.
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*/
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if (udata && udata->outlen >= sizeof(__u64)) {
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int err;
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cq->ip = rvt_create_mmap_info(rdi, sz, context, wc);
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if (!cq->ip) {
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ret = ERR_PTR(-ENOMEM);
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goto bail_wc;
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}
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err = ib_copy_to_udata(udata, &cq->ip->offset,
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sizeof(cq->ip->offset));
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if (err) {
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ret = ERR_PTR(err);
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goto bail_ip;
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}
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}
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spin_lock(&rdi->n_cqs_lock);
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if (rdi->n_cqs_allocated == rdi->dparms.props.max_cq) {
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spin_unlock(&rdi->n_cqs_lock);
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ret = ERR_PTR(-ENOMEM);
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goto bail_ip;
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}
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rdi->n_cqs_allocated++;
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spin_unlock(&rdi->n_cqs_lock);
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if (cq->ip) {
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spin_lock_irq(&rdi->pending_lock);
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list_add(&cq->ip->pending_mmaps, &rdi->pending_mmaps);
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spin_unlock_irq(&rdi->pending_lock);
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}
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/*
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* ib_create_cq() will initialize cq->ibcq except for cq->ibcq.cqe.
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* The number of entries should be >= the number requested or return
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* an error.
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*/
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cq->rdi = rdi;
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cq->ibcq.cqe = entries;
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cq->notify = RVT_CQ_NONE;
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spin_lock_init(&cq->lock);
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init_kthread_work(&cq->comptask, send_complete);
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cq->queue = wc;
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ret = &cq->ibcq;
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goto done;
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bail_ip:
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kfree(cq->ip);
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bail_wc:
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vfree(wc);
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bail_cq:
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kfree(cq);
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done:
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return ret;
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}
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/**
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* rvt_destroy_cq - destroy a completion queue
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* @ibcq: the completion queue to destroy.
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*
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* Called by ib_destroy_cq() in the generic verbs code.
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*
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* Return: always 0
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*/
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int rvt_destroy_cq(struct ib_cq *ibcq)
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{
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struct rvt_cq *cq = ibcq_to_rvtcq(ibcq);
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struct rvt_dev_info *rdi = cq->rdi;
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flush_kthread_work(&cq->comptask);
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spin_lock(&rdi->n_cqs_lock);
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rdi->n_cqs_allocated--;
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spin_unlock(&rdi->n_cqs_lock);
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if (cq->ip)
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kref_put(&cq->ip->ref, rvt_release_mmap_info);
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else
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vfree(cq->queue);
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kfree(cq);
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return 0;
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}
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/**
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* rvt_req_notify_cq - change the notification type for a completion queue
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* @ibcq: the completion queue
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* @notify_flags: the type of notification to request
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*
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* This may be called from interrupt context. Also called by
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* ib_req_notify_cq() in the generic verbs code.
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*
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* Return: 0 for success.
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*/
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int rvt_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
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{
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struct rvt_cq *cq = ibcq_to_rvtcq(ibcq);
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unsigned long flags;
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int ret = 0;
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spin_lock_irqsave(&cq->lock, flags);
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/*
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* Don't change IB_CQ_NEXT_COMP to IB_CQ_SOLICITED but allow
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* any other transitions (see C11-31 and C11-32 in ch. 11.4.2.2).
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*/
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if (cq->notify != IB_CQ_NEXT_COMP)
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cq->notify = notify_flags & IB_CQ_SOLICITED_MASK;
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if ((notify_flags & IB_CQ_REPORT_MISSED_EVENTS) &&
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cq->queue->head != cq->queue->tail)
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ret = 1;
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spin_unlock_irqrestore(&cq->lock, flags);
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return ret;
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}
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/**
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* rvt_resize_cq - change the size of the CQ
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* @ibcq: the completion queue
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*
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* Return: 0 for success.
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*/
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int rvt_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
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{
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struct rvt_cq *cq = ibcq_to_rvtcq(ibcq);
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struct rvt_cq_wc *old_wc;
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struct rvt_cq_wc *wc;
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u32 head, tail, n;
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int ret;
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u32 sz;
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struct rvt_dev_info *rdi = cq->rdi;
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if (cqe < 1 || cqe > rdi->dparms.props.max_cqe)
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return -EINVAL;
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/*
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* Need to use vmalloc() if we want to support large #s of entries.
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*/
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sz = sizeof(*wc);
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if (udata && udata->outlen >= sizeof(__u64))
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sz += sizeof(struct ib_uverbs_wc) * (cqe + 1);
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else
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sz += sizeof(struct ib_wc) * (cqe + 1);
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wc = vmalloc_user(sz);
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if (!wc)
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return -ENOMEM;
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/* Check that we can write the offset to mmap. */
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if (udata && udata->outlen >= sizeof(__u64)) {
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__u64 offset = 0;
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ret = ib_copy_to_udata(udata, &offset, sizeof(offset));
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if (ret)
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goto bail_free;
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}
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spin_lock_irq(&cq->lock);
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/*
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* Make sure head and tail are sane since they
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* might be user writable.
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*/
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old_wc = cq->queue;
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head = old_wc->head;
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if (head > (u32)cq->ibcq.cqe)
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head = (u32)cq->ibcq.cqe;
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tail = old_wc->tail;
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if (tail > (u32)cq->ibcq.cqe)
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tail = (u32)cq->ibcq.cqe;
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if (head < tail)
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n = cq->ibcq.cqe + 1 + head - tail;
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else
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n = head - tail;
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if (unlikely((u32)cqe < n)) {
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ret = -EINVAL;
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goto bail_unlock;
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}
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for (n = 0; tail != head; n++) {
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if (cq->ip)
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wc->uqueue[n] = old_wc->uqueue[tail];
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else
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wc->kqueue[n] = old_wc->kqueue[tail];
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if (tail == (u32)cq->ibcq.cqe)
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tail = 0;
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else
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tail++;
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}
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cq->ibcq.cqe = cqe;
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wc->head = n;
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wc->tail = 0;
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cq->queue = wc;
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spin_unlock_irq(&cq->lock);
|
|
|
|
vfree(old_wc);
|
|
|
|
if (cq->ip) {
|
|
struct rvt_mmap_info *ip = cq->ip;
|
|
|
|
rvt_update_mmap_info(rdi, ip, sz, wc);
|
|
|
|
/*
|
|
* Return the offset to mmap.
|
|
* See rvt_mmap() for details.
|
|
*/
|
|
if (udata && udata->outlen >= sizeof(__u64)) {
|
|
ret = ib_copy_to_udata(udata, &ip->offset,
|
|
sizeof(ip->offset));
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
spin_lock_irq(&rdi->pending_lock);
|
|
if (list_empty(&ip->pending_mmaps))
|
|
list_add(&ip->pending_mmaps, &rdi->pending_mmaps);
|
|
spin_unlock_irq(&rdi->pending_lock);
|
|
}
|
|
|
|
return 0;
|
|
|
|
bail_unlock:
|
|
spin_unlock_irq(&cq->lock);
|
|
bail_free:
|
|
vfree(wc);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* rvt_poll_cq - poll for work completion entries
|
|
* @ibcq: the completion queue to poll
|
|
* @num_entries: the maximum number of entries to return
|
|
* @entry: pointer to array where work completions are placed
|
|
*
|
|
* This may be called from interrupt context. Also called by ib_poll_cq()
|
|
* in the generic verbs code.
|
|
*
|
|
* Return: the number of completion entries polled.
|
|
*/
|
|
int rvt_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
|
|
{
|
|
struct rvt_cq *cq = ibcq_to_rvtcq(ibcq);
|
|
struct rvt_cq_wc *wc;
|
|
unsigned long flags;
|
|
int npolled;
|
|
u32 tail;
|
|
|
|
/* The kernel can only poll a kernel completion queue */
|
|
if (cq->ip)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&cq->lock, flags);
|
|
|
|
wc = cq->queue;
|
|
tail = wc->tail;
|
|
if (tail > (u32)cq->ibcq.cqe)
|
|
tail = (u32)cq->ibcq.cqe;
|
|
for (npolled = 0; npolled < num_entries; ++npolled, ++entry) {
|
|
if (tail == wc->head)
|
|
break;
|
|
/* The kernel doesn't need a RMB since it has the lock. */
|
|
*entry = wc->kqueue[tail];
|
|
if (tail >= cq->ibcq.cqe)
|
|
tail = 0;
|
|
else
|
|
tail++;
|
|
}
|
|
wc->tail = tail;
|
|
|
|
spin_unlock_irqrestore(&cq->lock, flags);
|
|
|
|
return npolled;
|
|
}
|
|
|
|
/**
|
|
* rvt_driver_cq_init - Init cq resources on behalf of driver
|
|
* @rdi: rvt dev structure
|
|
*
|
|
* Return: 0 on success
|
|
*/
|
|
int rvt_driver_cq_init(struct rvt_dev_info *rdi)
|
|
{
|
|
int ret = 0;
|
|
int cpu;
|
|
struct task_struct *task;
|
|
|
|
if (rdi->worker)
|
|
return 0;
|
|
spin_lock_init(&rdi->n_cqs_lock);
|
|
rdi->worker = kzalloc(sizeof(*rdi->worker), GFP_KERNEL);
|
|
if (!rdi->worker)
|
|
return -ENOMEM;
|
|
init_kthread_worker(rdi->worker);
|
|
task = kthread_create_on_node(
|
|
kthread_worker_fn,
|
|
rdi->worker,
|
|
rdi->dparms.node,
|
|
"%s", rdi->dparms.cq_name);
|
|
if (IS_ERR(task)) {
|
|
kfree(rdi->worker);
|
|
rdi->worker = NULL;
|
|
return PTR_ERR(task);
|
|
}
|
|
|
|
set_user_nice(task, MIN_NICE);
|
|
cpu = cpumask_first(cpumask_of_node(rdi->dparms.node));
|
|
kthread_bind(task, cpu);
|
|
wake_up_process(task);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* rvt_cq_exit - tear down cq reources
|
|
* @rdi: rvt dev structure
|
|
*/
|
|
void rvt_cq_exit(struct rvt_dev_info *rdi)
|
|
{
|
|
struct kthread_worker *worker;
|
|
|
|
worker = rdi->worker;
|
|
if (!worker)
|
|
return;
|
|
/* blocks future queuing from send_complete() */
|
|
rdi->worker = NULL;
|
|
smp_wmb(); /* See rdi_cq_enter */
|
|
flush_kthread_worker(worker);
|
|
kthread_stop(worker->task);
|
|
kfree(worker);
|
|
}
|