forked from Minki/linux
b14db1f0aa
Add sysfs entry to allow user to override affinity for SDMA engine interrupts. Reviewed-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
133 lines
4.1 KiB
C
133 lines
4.1 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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#ifndef _HFI1_AFFINITY_H
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#define _HFI1_AFFINITY_H
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#include "hfi.h"
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enum irq_type {
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IRQ_SDMA,
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IRQ_RCVCTXT,
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IRQ_GENERAL,
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IRQ_OTHER
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};
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/* Can be used for both memory and cpu */
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enum affinity_flags {
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AFF_AUTO,
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AFF_NUMA_LOCAL,
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AFF_DEV_LOCAL,
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AFF_IRQ_LOCAL
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};
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struct cpu_mask_set {
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struct cpumask mask;
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struct cpumask used;
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uint gen;
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};
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struct hfi1_affinity {
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struct cpu_mask_set def_intr;
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struct cpu_mask_set rcv_intr;
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struct cpumask real_cpu_mask;
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/* spin lock to protect affinity struct */
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spinlock_t lock;
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};
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struct hfi1_msix_entry;
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/* Initialize non-HT cpu cores mask */
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void init_real_cpu_mask(void);
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/* Initialize driver affinity data */
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int hfi1_dev_affinity_init(struct hfi1_devdata *);
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/*
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* Set IRQ affinity to a CPU. The function will determine the
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* CPU and set the affinity to it.
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*/
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int hfi1_get_irq_affinity(struct hfi1_devdata *, struct hfi1_msix_entry *);
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/*
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* Remove the IRQ's CPU affinity. This function also updates
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* any internal CPU tracking data
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*/
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void hfi1_put_irq_affinity(struct hfi1_devdata *, struct hfi1_msix_entry *);
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/*
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* Determine a CPU affinity for a user process, if the process does not
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* have an affinity set yet.
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*/
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int hfi1_get_proc_affinity(int);
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/* Release a CPU used by a user process. */
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void hfi1_put_proc_affinity(int);
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int hfi1_get_sdma_affinity(struct hfi1_devdata *dd, char *buf);
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int hfi1_set_sdma_affinity(struct hfi1_devdata *dd, const char *buf,
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size_t count);
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struct hfi1_affinity_node {
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int node;
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struct cpu_mask_set def_intr;
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struct cpu_mask_set rcv_intr;
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struct cpumask general_intr_mask;
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struct list_head list;
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};
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struct hfi1_affinity_node_list {
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struct list_head list;
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struct cpumask real_cpu_mask;
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struct cpu_mask_set proc;
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int num_core_siblings;
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int num_online_nodes;
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int num_online_cpus;
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/* protect affinity node list */
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spinlock_t lock;
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};
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int node_affinity_init(void);
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void node_affinity_destroy(void);
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extern struct hfi1_affinity_node_list node_affinity;
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#endif /* _HFI1_AFFINITY_H */
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