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_affinity { 74 struct cpu_mask_set def_intr; 75 struct cpu_mask_set rcv_intr; 76 struct cpumask real_cpu_mask; 77 /* spin lock to protect affinity struct */ 78 spinlock_t lock; 79 }; 80 81 struct hfi1_msix_entry; 82 83 /* Initialize non-HT cpu cores mask */ 84 void init_real_cpu_mask(void); 85 /* Initialize driver affinity data */ 86 int hfi1_dev_affinity_init(struct hfi1_devdata *); 87 /* 88 * Set IRQ affinity to a CPU. The function will determine the 89 * CPU and set the affinity to it. 90 */ 91 int hfi1_get_irq_affinity(struct hfi1_devdata *, struct hfi1_msix_entry *); 92 /* 93 * Remove the IRQ's CPU affinity. This function also updates 94 * any internal CPU tracking data 95 */ 96 void hfi1_put_irq_affinity(struct hfi1_devdata *, struct hfi1_msix_entry *); 97 /* 98 * Determine a CPU affinity for a user process, if the process does not 99 * have an affinity set yet. 100 */ 101 int hfi1_get_proc_affinity(int); 102 /* Release a CPU used by a user process. */ 103 void hfi1_put_proc_affinity(int); 104 105 int hfi1_get_sdma_affinity(struct hfi1_devdata *dd, char *buf); 106 int hfi1_set_sdma_affinity(struct hfi1_devdata *dd, const char *buf, 107 size_t count); 108 109 struct hfi1_affinity_node { 110 int node; 111 struct cpu_mask_set def_intr; 112 struct cpu_mask_set rcv_intr; 113 struct cpumask general_intr_mask; 114 struct list_head list; 115 }; 116 117 struct hfi1_affinity_node_list { 118 struct list_head list; 119 struct cpumask real_cpu_mask; 120 struct cpu_mask_set proc; 121 int num_core_siblings; 122 int num_online_nodes; 123 int num_online_cpus; 124 struct mutex lock; /* protects affinity nodes */ 125 }; 126 127 int node_affinity_init(void); 128 void node_affinity_destroy(void); 129 extern struct hfi1_affinity_node_list node_affinity; 130 131 #endif /* _HFI1_AFFINITY_H */ 132