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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b7df192f74
Use the new cache evict operation in the SDMA code. This allows the cache to properly coordinate evicts and removes, preventing any race. With this change, the separate list, lock, and race flag are not needed. Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/*
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* Copyright(c) 2015, 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/device.h>
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#include <linux/wait.h>
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#include "common.h"
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#include "iowait.h"
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#include "user_exp_rcv.h"
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extern uint extended_psn;
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struct hfi1_user_sdma_pkt_q {
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struct list_head list;
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unsigned ctxt;
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unsigned subctxt;
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u16 n_max_reqs;
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atomic_t n_reqs;
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u16 reqidx;
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struct hfi1_devdata *dd;
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struct kmem_cache *txreq_cache;
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struct user_sdma_request *reqs;
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unsigned long *req_in_use;
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struct iowait busy;
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unsigned state;
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wait_queue_head_t wait;
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unsigned long unpinned;
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struct mmu_rb_handler *handler;
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atomic_t n_locked;
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struct mm_struct *mm;
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};
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struct hfi1_user_sdma_comp_q {
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u16 nentries;
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struct hfi1_sdma_comp_entry *comps;
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};
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int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *, struct file *);
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int hfi1_user_sdma_free_queues(struct hfi1_filedata *);
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int hfi1_user_sdma_process_request(struct file *, struct iovec *, unsigned long,
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unsigned long *);
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