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 
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 *dd);
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 *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  */
89 void 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  */
95 int hfi1_get_proc_affinity(int node);
96 /* Release a CPU used by a user process. */
97 void hfi1_put_proc_affinity(int cpu);
98 
99 struct 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 
109 struct 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 
120 int node_affinity_init(void);
121 void node_affinity_destroy_all(void);
122 extern struct hfi1_affinity_node_list node_affinity;
123 void hfi1_dev_affinity_clean_up(struct hfi1_devdata *dd);
124 int hfi1_comp_vect_mappings_lookup(struct rvt_dev_info *rdi, int comp_vect);
125 int hfi1_comp_vectors_set_up(struct hfi1_devdata *dd);
126 void hfi1_comp_vectors_clean_up(struct hfi1_devdata *dd);
127 
128 #endif /* _HFI1_AFFINITY_H */
129