LXR linux/drivers/infiniband/hw/hfi1/affinity.h

   1/*
   2 * Copyright(c) 2015 - 2018 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
  52enum 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 */
  60enum affinity_flags {
  61        AFF_AUTO,
  62        AFF_NUMA_LOCAL,
  63        AFF_DEV_LOCAL,
  64        AFF_IRQ_LOCAL
  65};
  66
  67struct cpu_mask_set {
  68        struct cpumask mask;
  69        struct cpumask used;
  70        uint gen;
  71};
  72
  73struct hfi1_msix_entry;
  74
  75/* Initialize non-HT cpu cores mask */
  76void init_real_cpu_mask(void);
  77/* Initialize driver affinity data */
  78int hfi1_dev_affinity_init(struct hfi1_devdata *dd);
  79/*
  80 * Set IRQ affinity to a CPU. The function will determine the
  81 * CPU and set the affinity to it.
  82 */
  83int hfi1_get_irq_affinity(struct hfi1_devdata *dd,
  84                          struct hfi1_msix_entry *msix);
  85/*
  86 * Remove the IRQ's CPU affinity. This function also updates
  87 * any internal CPU tracking data
  88 */
  89void hfi1_put_irq_affinity(struct hfi1_devdata *dd,
  90                           struct hfi1_msix_entry *msix);
  91/*
  92 * Determine a CPU affinity for a user process, if the process does not
  93 * have an affinity set yet.
  94 */
  95int hfi1_get_proc_affinity(int node);
  96/* Release a CPU used by a user process. */
  97void hfi1_put_proc_affinity(int cpu);
  98
  99struct hfi1_affinity_node {
 100        int node;
 101        u16 __percpu *comp_vect_affinity;
 102        struct cpu_mask_set def_intr;
 103        struct cpu_mask_set rcv_intr;
 104        struct cpumask general_intr_mask;
 105        struct cpumask comp_vect_mask;
 106        struct list_head list;
 107};
 108
 109struct hfi1_affinity_node_list {
 110        struct list_head list;
 111        struct cpumask real_cpu_mask;
 112        struct cpu_mask_set proc;
 113        int num_core_siblings;
 114        int num_possible_nodes;
 115        int num_online_nodes;
 116        int num_online_cpus;
 117        struct mutex lock; /* protects affinity nodes */
 118};
 119
 120int node_affinity_init(void);
 121void node_affinity_destroy_all(void);
 122extern struct hfi1_affinity_node_list node_affinity;
 123void hfi1_dev_affinity_clean_up(struct hfi1_devdata *dd);
 124int hfi1_comp_vect_mappings_lookup(struct rvt_dev_info *rdi, int comp_vect);
 125int hfi1_comp_vectors_set_up(struct hfi1_devdata *dd);
 126void hfi1_comp_vectors_clean_up(struct hfi1_devdata *dd);
 127
 128#endif /* _HFI1_AFFINITY_H */
 129