1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright 2015 IBM Corp.
4 */
5
6 #ifndef _HCALLS_H
7 #define _HCALLS_H
8
9 #include <linux/types.h>
10 #include <asm/byteorder.h>
11 #include <asm/hvcall.h>
12 #include "cxl.h"
13
14 #define SG_BUFFER_SIZE 4096
15 #define SG_MAX_ENTRIES 256
16
17 struct sg_list {
18 u64 phys_addr;
19 u64 len;
20 };
21
22 /*
23 * This is straight out of PAPR, but replacing some of the compound fields with
24 * a single field, where they were identical to the register layout.
25 *
26 * The 'flags' parameter regroups the various bit-fields
27 */
28 #define CXL_PE_CSRP_VALID (1ULL << 63)
29 #define CXL_PE_PROBLEM_STATE (1ULL << 62)
30 #define CXL_PE_SECONDARY_SEGMENT_TBL_SRCH (1ULL << 61)
31 #define CXL_PE_TAGS_ACTIVE (1ULL << 60)
32 #define CXL_PE_USER_STATE (1ULL << 59)
33 #define CXL_PE_TRANSLATION_ENABLED (1ULL << 58)
34 #define CXL_PE_64_BIT (1ULL << 57)
35 #define CXL_PE_PRIVILEGED_PROCESS (1ULL << 56)
36
37 #define CXL_PROCESS_ELEMENT_VERSION 1
38 struct cxl_process_element_hcall {
39 __be64 version;
40 __be64 flags;
41 u8 reserved0[12];
42 __be32 pslVirtualIsn;
43 u8 applicationVirtualIsnBitmap[256];
44 u8 reserved1[144];
45 struct cxl_process_element_common common;
46 u8 reserved4[12];
47 } __packed;
48
49 #define H_STATE_NORMAL 1
50 #define H_STATE_DISABLE 2
51 #define H_STATE_TEMP_UNAVAILABLE 3
52 #define H_STATE_PERM_UNAVAILABLE 4
53
54 /* NOTE: element must be a logical real address, and must be pinned */
55 long cxl_h_attach_process(u64 unit_address, struct cxl_process_element_hcall *element,
56 u64 *process_token, u64 *mmio_addr, u64 *mmio_size);
57
58 /**
59 * cxl_h_detach_process - Detach a process element from a coherent
60 * platform function.
61 */
62 long cxl_h_detach_process(u64 unit_address, u64 process_token);
63
64 /**
65 * cxl_h_reset_afu - Perform a reset to the coherent platform function.
66 */
67 long cxl_h_reset_afu(u64 unit_address);
68
69 /**
70 * cxl_h_suspend_process - Suspend a process from being executed
71 * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
72 * process was attached.
73 */
74 long cxl_h_suspend_process(u64 unit_address, u64 process_token);
75
76 /**
77 * cxl_h_resume_process - Resume a process to be executed
78 * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
79 * process was attached.
80 */
81 long cxl_h_resume_process(u64 unit_address, u64 process_token);
82
83 /**
84 * cxl_h_read_error_state - Reads the error state of the coherent
85 * platform function.
86 * R4 contains the error state
87 */
88 long cxl_h_read_error_state(u64 unit_address, u64 *state);
89
90 /**
91 * cxl_h_get_afu_err - collect the AFU error buffer
92 * Parameter1 = byte offset into error buffer to retrieve, valid values
93 * are between 0 and (ibm,error-buffer-size - 1)
94 * Parameter2 = 4K aligned real address of error buffer, to be filled in
95 * Parameter3 = length of error buffer, valid values are 4K or less
96 */
97 long cxl_h_get_afu_err(u64 unit_address, u64 offset, u64 buf_address, u64 len);
98
99 /**
100 * cxl_h_get_config - collect configuration record for the
101 * coherent platform function
102 * Parameter1 = # of configuration record to retrieve, valid values are
103 * between 0 and (ibm,#config-records - 1)
104 * Parameter2 = byte offset into configuration record to retrieve,
105 * valid values are between 0 and (ibm,config-record-size - 1)
106 * Parameter3 = 4K aligned real address of configuration record buffer,
107 * to be filled in
108 * Parameter4 = length of configuration buffer, valid values are 4K or less
109 */
110 long cxl_h_get_config(u64 unit_address, u64 cr_num, u64 offset,
111 u64 buf_address, u64 len);
112
113 /**
114 * cxl_h_terminate_process - Terminate the process before completion
115 * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when
116 * process was attached.
117 */
118 long cxl_h_terminate_process(u64 unit_address, u64 process_token);
119
120 /**
121 * cxl_h_collect_vpd - Collect VPD for the coherent platform function.
122 * Parameter1 = # of VPD record to retrieve, valid values are between 0
123 * and (ibm,#config-records - 1).
124 * Parameter2 = 4K naturally aligned real buffer containing block
125 * list entries
126 * Parameter3 = number of block list entries in the block list, valid
127 * values are between 0 and 256
128 */
129 long cxl_h_collect_vpd(u64 unit_address, u64 record, u64 list_address,
130 u64 num, u64 *out);
131
132 /**
133 * cxl_h_get_fn_error_interrupt - Read the function-wide error data based on an interrupt
134 */
135 long cxl_h_get_fn_error_interrupt(u64 unit_address, u64 *reg);
136
137 /**
138 * cxl_h_ack_fn_error_interrupt - Acknowledge function-wide error data
139 * based on an interrupt
140 * Parameter1 = value to write to the function-wide error interrupt register
141 */
142 long cxl_h_ack_fn_error_interrupt(u64 unit_address, u64 value);
143
144 /**
145 * cxl_h_get_error_log - Retrieve the Platform Log ID (PLID) of
146 * an error log
147 */
148 long cxl_h_get_error_log(u64 unit_address, u64 value);
149
150 /**
151 * cxl_h_collect_int_info - Collect interrupt info about a coherent
152 * platform function after an interrupt occurred.
153 */
154 long cxl_h_collect_int_info(u64 unit_address, u64 process_token,
155 struct cxl_irq_info *info);
156
157 /**
158 * cxl_h_control_faults - Control the operation of a coherent platform
159 * function after a fault occurs.
160 *
161 * Parameters
162 * control-mask: value to control the faults
163 * looks like PSL_TFC_An shifted >> 32
164 * reset-mask: mask to control reset of function faults
165 * Set reset_mask = 1 to reset PSL errors
166 */
167 long cxl_h_control_faults(u64 unit_address, u64 process_token,
168 u64 control_mask, u64 reset_mask);
169
170 /**
171 * cxl_h_reset_adapter - Perform a reset to the coherent platform facility.
172 */
173 long cxl_h_reset_adapter(u64 unit_address);
174
175 /**
176 * cxl_h_collect_vpd - Collect VPD for the coherent platform function.
177 * Parameter1 = 4K naturally aligned real buffer containing block
178 * list entries
179 * Parameter2 = number of block list entries in the block list, valid
180 * values are between 0 and 256
181 */
182 long cxl_h_collect_vpd_adapter(u64 unit_address, u64 list_address,
183 u64 num, u64 *out);
184
185 /**
186 * cxl_h_download_adapter_image - Download the base image to the coherent
187 * platform facility.
188 */
189 long cxl_h_download_adapter_image(u64 unit_address,
190 u64 list_address, u64 num,
191 u64 *out);
192
193 /**
194 * cxl_h_validate_adapter_image - Validate the base image in the coherent
195 * platform facility.
196 */
197 long cxl_h_validate_adapter_image(u64 unit_address,
198 u64 list_address, u64 num,
199 u64 *out);
200 #endif /* _HCALLS_H */