1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef LINUX_POWERPC_PERF_HV_24X7_H_
3 #define LINUX_POWERPC_PERF_HV_24X7_H_
4 
5 #include <linux/types.h>
6 
7 enum hv_perf_domains {
8 #define DOMAIN(n, v, x, c) HV_PERF_DOMAIN_##n = v,
9 #include "hv-24x7-domains.h"
10 #undef DOMAIN
11 	HV_PERF_DOMAIN_MAX,
12 };
13 
14 #define H24x7_REQUEST_SIZE(iface_version)	(iface_version == 1 ? 16 : 32)
15 
16 struct hv_24x7_request {
17 	/* PHYSICAL domains require enabling via phyp/hmc. */
18 	__u8 performance_domain;
19 	__u8 reserved[0x1];
20 
21 	/* bytes to read starting at @data_offset. must be a multiple of 8 */
22 	__be16 data_size;
23 
24 	/*
25 	 * byte offset within the perf domain to read from. must be 8 byte
26 	 * aligned
27 	 */
28 	__be32 data_offset;
29 
30 	/*
31 	 * only valid for VIRTUAL_PROCESSOR domains, ignored for others.
32 	 * -1 means "current partition only"
33 	 *  Enabling via phyp/hmc required for non-"-1" values. 0 forbidden
34 	 *  unless requestor is 0.
35 	 */
36 	__be16 starting_lpar_ix;
37 
38 	/*
39 	 * Ignored when @starting_lpar_ix == -1
40 	 * Ignored when @performance_domain is not VIRTUAL_PROCESSOR_*
41 	 * -1 means "infinite" or all
42 	 */
43 	__be16 max_num_lpars;
44 
45 	/* chip, core, or virtual processor based on @performance_domain */
46 	__be16 starting_ix;
47 	__be16 max_ix;
48 
49 	/* The following fields were added in v2 of the 24x7 interface. */
50 
51 	__u8 starting_thread_group_ix;
52 
53 	/* -1 means all thread groups starting at @starting_thread_group_ix */
54 	__u8 max_num_thread_groups;
55 
56 	__u8 reserved2[0xE];
57 } __packed;
58 
59 struct hv_24x7_request_buffer {
60 	/* 0 - ? */
61 	/* 1 - ? */
62 	__u8 interface_version;
63 	__u8 num_requests;
64 	__u8 reserved[0xE];
65 	struct hv_24x7_request requests[];
66 } __packed;
67 
68 struct hv_24x7_result_element_v1 {
69 	__be16 lpar_ix;
70 
71 	/*
72 	 * represents the core, chip, or virtual processor based on the
73 	 * request's @performance_domain
74 	 */
75 	__be16 domain_ix;
76 
77 	/* -1 if @performance_domain does not refer to a virtual processor */
78 	__be32 lpar_cfg_instance_id;
79 
80 	/* size = @result_element_data_size of containing result. */
81 	__u64 element_data[];
82 } __packed;
83 
84 /*
85  * We need a separate struct for v2 because the offset of @element_data changed
86  * between versions.
87  */
88 struct hv_24x7_result_element_v2 {
89 	__be16 lpar_ix;
90 
91 	/*
92 	 * represents the core, chip, or virtual processor based on the
93 	 * request's @performance_domain
94 	 */
95 	__be16 domain_ix;
96 
97 	/* -1 if @performance_domain does not refer to a virtual processor */
98 	__be32 lpar_cfg_instance_id;
99 
100 	__u8 thread_group_ix;
101 
102 	__u8 reserved[7];
103 
104 	/* size = @result_element_data_size of containing result. */
105 	__u64 element_data[];
106 } __packed;
107 
108 struct hv_24x7_result {
109 	/*
110 	 * The index of the 24x7 Request Structure in the 24x7 Request Buffer
111 	 * used to request this result.
112 	 */
113 	__u8 result_ix;
114 
115 	/*
116 	 * 0 = not all result elements fit into the buffer, additional requests
117 	 *     required
118 	 * 1 = all result elements were returned
119 	 */
120 	__u8 results_complete;
121 	__be16 num_elements_returned;
122 
123 	/*
124 	 * This is a copy of @data_size from the corresponding hv_24x7_request
125 	 *
126 	 * Warning: to obtain the size of each element in @elements you have
127 	 * to add the size of the other members of the result_element struct.
128 	 */
129 	__be16 result_element_data_size;
130 	__u8 reserved[0x2];
131 
132 	/*
133 	 * Either
134 	 *	struct hv_24x7_result_element_v1[@num_elements_returned]
135 	 * or
136 	 *	struct hv_24x7_result_element_v2[@num_elements_returned]
137 	 *
138 	 * depending on the interface_version field of the
139 	 * struct hv_24x7_data_result_buffer containing this result.
140 	 */
141 	char elements[];
142 } __packed;
143 
144 struct hv_24x7_data_result_buffer {
145 	/* See versioning for request buffer */
146 	__u8 interface_version;
147 
148 	__u8 num_results;
149 	__u8 reserved[0x1];
150 	__u8 failing_request_ix;
151 	__be32 detailed_rc;
152 	__be64 cec_cfg_instance_id;
153 	__be64 catalog_version_num;
154 	__u8 reserved2[0x8];
155 	/* WARNING: only valid for the first result due to variable sizes of
156 	 *	    results */
157 	struct hv_24x7_result results[]; /* [@num_results] */
158 } __packed;
159 
160 #endif
161