drivers/infiniband/hw/hfi1/affinity.h

   1 /*
   2  * Copyright(c) 2015, 2016 Intel Corporation.
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * BSD LICENSE
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  *
  24  *  - Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  *  - Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in
  28  *    the documentation and/or other materials provided with the
  29  *    distribution.
  30  *  - Neither the name of Intel Corporation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  *
  46  */
  47 #ifndef _HFI1_AFFINITY_H
  48 #define _HFI1_AFFINITY_H
  49
  50 #include "hfi.h"
  51
  52 enum irq_type {
  53         IRQ_SDMA,
  54         IRQ_RCVCTXT,
  55         IRQ_GENERAL,
  56         IRQ_OTHER
  57 };
  58
  59 /* Can be used for both memory and cpu */
  60 enum affinity_flags {
  61         AFF_AUTO,
  62         AFF_NUMA_LOCAL,
  63         AFF_DEV_LOCAL,
  64         AFF_IRQ_LOCAL
  65 };
  66
  67 struct cpu_mask_set {
  68         struct cpumask mask;
  69         struct cpumask used;
  70         uint gen;
  71 };
  72
  73 struct hfi1_msix_entry;
  74
  75 /* Initialize non-HT cpu cores mask */
  76 void init_real_cpu_mask(void);
  77 /* Initialize driver affinity data */
  78 int hfi1_dev_affinity_init(struct hfi1_devdata *);
  79 /*
  80  * Set IRQ affinity to a CPU. The function will determine the
  81  * CPU and set the affinity to it.
  82  */
  83 int hfi1_get_irq_affinity(struct hfi1_devdata *, struct hfi1_msix_entry *);
  84 /*
  85  * Remove the IRQ's CPU affinity. This function also updates
  86  * any internal CPU tracking data
  87  */
  88 void hfi1_put_irq_affinity(struct hfi1_devdata *, struct hfi1_msix_entry *);
  89 /*
  90  * Determine a CPU affinity for a user process, if the process does not
  91  * have an affinity set yet.
  92  */
  93 int hfi1_get_proc_affinity(int);
  94 /* Release a CPU used by a user process. */
  95 void hfi1_put_proc_affinity(int);
  96
  97 struct hfi1_affinity_node {
  98         int node;
  99         struct cpu_mask_set def_intr;
 100         struct cpu_mask_set rcv_intr;
 101         struct cpumask general_intr_mask;
 102         struct list_head list;
 103 };
 104
 105 struct hfi1_affinity_node_list {
 106         struct list_head list;
 107         struct cpumask real_cpu_mask;
 108         struct cpu_mask_set proc;
 109         int num_core_siblings;
 110         int num_possible_nodes;
 111         int num_online_nodes;
 112         int num_online_cpus;
 113         struct mutex lock; /* protects affinity nodes */
 114 };
 115
 116 int node_affinity_init(void);
 117 void node_affinity_destroy(void);
 118 extern struct hfi1_affinity_node_list node_affinity;
 119
 120 #endif /* _HFI1_AFFINITY_H */