Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 IBM Corp. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | */ |
| 9 | |
| 10 | |
| 11 | #include <linux/compiler.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/delay.h> |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 14 | #include <asm/byteorder.h> |
| 15 | #include "hcalls.h" |
Christophe Lombard | e7a801a | 2016-03-04 12:26:42 +0100 | [diff] [blame] | 16 | #include "trace.h" |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 17 | |
| 18 | #define CXL_HCALL_TIMEOUT 60000 |
| 19 | #define CXL_HCALL_TIMEOUT_DOWNLOAD 120000 |
| 20 | |
| 21 | #define H_ATTACH_CA_PROCESS 0x344 |
| 22 | #define H_CONTROL_CA_FUNCTION 0x348 |
| 23 | #define H_DETACH_CA_PROCESS 0x34C |
| 24 | #define H_COLLECT_CA_INT_INFO 0x350 |
| 25 | #define H_CONTROL_CA_FAULTS 0x354 |
| 26 | #define H_DOWNLOAD_CA_FUNCTION 0x35C |
| 27 | #define H_DOWNLOAD_CA_FACILITY 0x364 |
| 28 | #define H_CONTROL_CA_FACILITY 0x368 |
| 29 | |
| 30 | #define H_CONTROL_CA_FUNCTION_RESET 1 /* perform a reset */ |
| 31 | #define H_CONTROL_CA_FUNCTION_SUSPEND_PROCESS 2 /* suspend a process from being executed */ |
| 32 | #define H_CONTROL_CA_FUNCTION_RESUME_PROCESS 3 /* resume a process to be executed */ |
| 33 | #define H_CONTROL_CA_FUNCTION_READ_ERR_STATE 4 /* read the error state */ |
| 34 | #define H_CONTROL_CA_FUNCTION_GET_AFU_ERR 5 /* collect the AFU error buffer */ |
| 35 | #define H_CONTROL_CA_FUNCTION_GET_CONFIG 6 /* collect configuration record */ |
| 36 | #define H_CONTROL_CA_FUNCTION_GET_DOWNLOAD_STATE 7 /* query to return download status */ |
| 37 | #define H_CONTROL_CA_FUNCTION_TERMINATE_PROCESS 8 /* terminate the process before completion */ |
| 38 | #define H_CONTROL_CA_FUNCTION_COLLECT_VPD 9 /* collect VPD */ |
| 39 | #define H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT 11 /* read the function-wide error data based on an interrupt */ |
| 40 | #define H_CONTROL_CA_FUNCTION_ACK_FUNCTION_ERR_INT 12 /* acknowledge function-wide error data based on an interrupt */ |
| 41 | #define H_CONTROL_CA_FUNCTION_GET_ERROR_LOG 13 /* retrieve the Platform Log ID (PLID) of an error log */ |
| 42 | |
| 43 | #define H_CONTROL_CA_FAULTS_RESPOND_PSL 1 |
| 44 | #define H_CONTROL_CA_FAULTS_RESPOND_AFU 2 |
| 45 | |
| 46 | #define H_CONTROL_CA_FACILITY_RESET 1 /* perform a reset */ |
| 47 | #define H_CONTROL_CA_FACILITY_COLLECT_VPD 2 /* collect VPD */ |
| 48 | |
| 49 | #define H_DOWNLOAD_CA_FACILITY_DOWNLOAD 1 /* download adapter image */ |
| 50 | #define H_DOWNLOAD_CA_FACILITY_VALIDATE 2 /* validate adapter image */ |
| 51 | |
| 52 | |
| 53 | #define _CXL_LOOP_HCALL(call, rc, retbuf, fn, ...) \ |
| 54 | { \ |
| 55 | unsigned int delay, total_delay = 0; \ |
| 56 | u64 token = 0; \ |
| 57 | \ |
| 58 | memset(retbuf, 0, sizeof(retbuf)); \ |
| 59 | while (1) { \ |
| 60 | rc = call(fn, retbuf, __VA_ARGS__, token); \ |
| 61 | token = retbuf[0]; \ |
| 62 | if (rc != H_BUSY && !H_IS_LONG_BUSY(rc)) \ |
| 63 | break; \ |
| 64 | \ |
| 65 | if (rc == H_BUSY) \ |
| 66 | delay = 10; \ |
| 67 | else \ |
| 68 | delay = get_longbusy_msecs(rc); \ |
| 69 | \ |
| 70 | total_delay += delay; \ |
| 71 | if (total_delay > CXL_HCALL_TIMEOUT) { \ |
| 72 | WARN(1, "Warning: Giving up waiting for CXL hcall " \ |
| 73 | "%#x after %u msec\n", fn, total_delay); \ |
| 74 | rc = H_BUSY; \ |
| 75 | break; \ |
| 76 | } \ |
| 77 | msleep(delay); \ |
| 78 | } \ |
| 79 | } |
| 80 | #define CXL_H_WAIT_UNTIL_DONE(...) _CXL_LOOP_HCALL(plpar_hcall, __VA_ARGS__) |
| 81 | #define CXL_H9_WAIT_UNTIL_DONE(...) _CXL_LOOP_HCALL(plpar_hcall9, __VA_ARGS__) |
| 82 | |
| 83 | #define _PRINT_MSG(rc, format, ...) \ |
| 84 | { \ |
| 85 | if ((rc != H_SUCCESS) && (rc != H_CONTINUE)) \ |
| 86 | pr_err(format, __VA_ARGS__); \ |
| 87 | else \ |
| 88 | pr_devel(format, __VA_ARGS__); \ |
| 89 | } \ |
| 90 | |
| 91 | |
| 92 | static char *afu_op_names[] = { |
| 93 | "UNKNOWN_OP", /* 0 undefined */ |
| 94 | "RESET", /* 1 */ |
| 95 | "SUSPEND_PROCESS", /* 2 */ |
| 96 | "RESUME_PROCESS", /* 3 */ |
| 97 | "READ_ERR_STATE", /* 4 */ |
| 98 | "GET_AFU_ERR", /* 5 */ |
| 99 | "GET_CONFIG", /* 6 */ |
| 100 | "GET_DOWNLOAD_STATE", /* 7 */ |
| 101 | "TERMINATE_PROCESS", /* 8 */ |
| 102 | "COLLECT_VPD", /* 9 */ |
| 103 | "UNKNOWN_OP", /* 10 undefined */ |
| 104 | "GET_FUNCTION_ERR_INT", /* 11 */ |
| 105 | "ACK_FUNCTION_ERR_INT", /* 12 */ |
| 106 | "GET_ERROR_LOG", /* 13 */ |
| 107 | }; |
| 108 | |
| 109 | static char *control_adapter_op_names[] = { |
| 110 | "UNKNOWN_OP", /* 0 undefined */ |
| 111 | "RESET", /* 1 */ |
| 112 | "COLLECT_VPD", /* 2 */ |
| 113 | }; |
| 114 | |
| 115 | static char *download_op_names[] = { |
| 116 | "UNKNOWN_OP", /* 0 undefined */ |
| 117 | "DOWNLOAD", /* 1 */ |
| 118 | "VALIDATE", /* 2 */ |
| 119 | }; |
| 120 | |
| 121 | static char *op_str(unsigned int op, char *name_array[], int array_len) |
| 122 | { |
| 123 | if (op >= array_len) |
| 124 | return "UNKNOWN_OP"; |
| 125 | return name_array[op]; |
| 126 | } |
| 127 | |
| 128 | #define OP_STR(op, name_array) op_str(op, name_array, ARRAY_SIZE(name_array)) |
| 129 | |
| 130 | #define OP_STR_AFU(op) OP_STR(op, afu_op_names) |
| 131 | #define OP_STR_CONTROL_ADAPTER(op) OP_STR(op, control_adapter_op_names) |
| 132 | #define OP_STR_DOWNLOAD_ADAPTER(op) OP_STR(op, download_op_names) |
| 133 | |
| 134 | |
| 135 | long cxl_h_attach_process(u64 unit_address, |
| 136 | struct cxl_process_element_hcall *element, |
| 137 | u64 *process_token, u64 *mmio_addr, u64 *mmio_size) |
| 138 | { |
| 139 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
| 140 | long rc; |
| 141 | |
| 142 | CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_ATTACH_CA_PROCESS, unit_address, virt_to_phys(element)); |
| 143 | _PRINT_MSG(rc, "cxl_h_attach_process(%#.16llx, %#.16lx): %li\n", |
| 144 | unit_address, virt_to_phys(element), rc); |
Christophe Lombard | e7a801a | 2016-03-04 12:26:42 +0100 | [diff] [blame] | 145 | trace_cxl_hcall_attach(unit_address, virt_to_phys(element), retbuf[0], retbuf[1], retbuf[2], rc); |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 146 | |
| 147 | pr_devel("token: 0x%.8lx mmio_addr: 0x%lx mmio_size: 0x%lx\nProcess Element Structure:\n", |
| 148 | retbuf[0], retbuf[1], retbuf[2]); |
| 149 | cxl_dump_debug_buffer(element, sizeof(*element)); |
| 150 | |
| 151 | switch (rc) { |
| 152 | case H_SUCCESS: /* The process info is attached to the coherent platform function */ |
| 153 | *process_token = retbuf[0]; |
| 154 | if (mmio_addr) |
| 155 | *mmio_addr = retbuf[1]; |
| 156 | if (mmio_size) |
| 157 | *mmio_size = retbuf[2]; |
| 158 | return 0; |
| 159 | case H_PARAMETER: /* An incorrect parameter was supplied. */ |
| 160 | case H_FUNCTION: /* The function is not supported. */ |
| 161 | return -EINVAL; |
| 162 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ |
| 163 | case H_RESOURCE: /* The coherent platform function does not have enough additional resource to attach the process */ |
| 164 | case H_HARDWARE: /* A hardware event prevented the attach operation */ |
| 165 | case H_STATE: /* The coherent platform function is not in a valid state */ |
| 166 | case H_BUSY: |
| 167 | return -EBUSY; |
| 168 | default: |
| 169 | WARN(1, "Unexpected return code: %lx", rc); |
| 170 | return -EINVAL; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * cxl_h_detach_process - Detach a process element from a coherent |
| 176 | * platform function. |
| 177 | */ |
| 178 | long cxl_h_detach_process(u64 unit_address, u64 process_token) |
| 179 | { |
| 180 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
| 181 | long rc; |
| 182 | |
| 183 | CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_DETACH_CA_PROCESS, unit_address, process_token); |
| 184 | _PRINT_MSG(rc, "cxl_h_detach_process(%#.16llx, 0x%.8llx): %li\n", unit_address, process_token, rc); |
Christophe Lombard | e7a801a | 2016-03-04 12:26:42 +0100 | [diff] [blame] | 185 | trace_cxl_hcall_detach(unit_address, process_token, rc); |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 186 | |
| 187 | switch (rc) { |
| 188 | case H_SUCCESS: /* The process was detached from the coherent platform function */ |
| 189 | return 0; |
| 190 | case H_PARAMETER: /* An incorrect parameter was supplied. */ |
| 191 | return -EINVAL; |
| 192 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ |
| 193 | case H_RESOURCE: /* The function has page table mappings for MMIO */ |
| 194 | case H_HARDWARE: /* A hardware event prevented the detach operation */ |
| 195 | case H_STATE: /* The coherent platform function is not in a valid state */ |
| 196 | case H_BUSY: |
| 197 | return -EBUSY; |
| 198 | default: |
| 199 | WARN(1, "Unexpected return code: %lx", rc); |
| 200 | return -EINVAL; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * cxl_h_control_function - This H_CONTROL_CA_FUNCTION hypervisor call allows |
| 206 | * the partition to manipulate or query |
| 207 | * certain coherent platform function behaviors. |
| 208 | */ |
| 209 | static long cxl_h_control_function(u64 unit_address, u64 op, |
| 210 | u64 p1, u64 p2, u64 p3, u64 p4, u64 *out) |
| 211 | { |
| 212 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; |
| 213 | long rc; |
| 214 | |
| 215 | CXL_H9_WAIT_UNTIL_DONE(rc, retbuf, H_CONTROL_CA_FUNCTION, unit_address, op, p1, p2, p3, p4); |
| 216 | _PRINT_MSG(rc, "cxl_h_control_function(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n", |
| 217 | unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc); |
Christophe Lombard | e7a801a | 2016-03-04 12:26:42 +0100 | [diff] [blame] | 218 | trace_cxl_hcall_control_function(unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc); |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 219 | |
| 220 | switch (rc) { |
| 221 | case H_SUCCESS: /* The operation is completed for the coherent platform function */ |
| 222 | if ((op == H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT || |
| 223 | op == H_CONTROL_CA_FUNCTION_READ_ERR_STATE || |
| 224 | op == H_CONTROL_CA_FUNCTION_COLLECT_VPD)) |
| 225 | *out = retbuf[0]; |
| 226 | return 0; |
| 227 | case H_PARAMETER: /* An incorrect parameter was supplied. */ |
| 228 | case H_FUNCTION: /* The function is not supported. */ |
| 229 | case H_NOT_FOUND: /* The operation supplied was not valid */ |
| 230 | case H_NOT_AVAILABLE: /* The operation cannot be performed because the AFU has not been downloaded */ |
| 231 | case H_SG_LIST: /* An block list entry was invalid */ |
| 232 | return -EINVAL; |
| 233 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ |
| 234 | case H_RESOURCE: /* The function has page table mappings for MMIO */ |
| 235 | case H_HARDWARE: /* A hardware event prevented the attach operation */ |
| 236 | case H_STATE: /* The coherent platform function is not in a valid state */ |
| 237 | case H_BUSY: |
| 238 | return -EBUSY; |
| 239 | default: |
| 240 | WARN(1, "Unexpected return code: %lx", rc); |
| 241 | return -EINVAL; |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | /** |
| 246 | * cxl_h_reset_afu - Perform a reset to the coherent platform function. |
| 247 | */ |
| 248 | long cxl_h_reset_afu(u64 unit_address) |
| 249 | { |
| 250 | return cxl_h_control_function(unit_address, |
| 251 | H_CONTROL_CA_FUNCTION_RESET, |
| 252 | 0, 0, 0, 0, |
| 253 | NULL); |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * cxl_h_suspend_process - Suspend a process from being executed |
| 258 | * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when |
| 259 | * process was attached. |
| 260 | */ |
| 261 | long cxl_h_suspend_process(u64 unit_address, u64 process_token) |
| 262 | { |
| 263 | return cxl_h_control_function(unit_address, |
| 264 | H_CONTROL_CA_FUNCTION_SUSPEND_PROCESS, |
| 265 | process_token, 0, 0, 0, |
| 266 | NULL); |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * cxl_h_resume_process - Resume a process to be executed |
| 271 | * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when |
| 272 | * process was attached. |
| 273 | */ |
| 274 | long cxl_h_resume_process(u64 unit_address, u64 process_token) |
| 275 | { |
| 276 | return cxl_h_control_function(unit_address, |
| 277 | H_CONTROL_CA_FUNCTION_RESUME_PROCESS, |
| 278 | process_token, 0, 0, 0, |
| 279 | NULL); |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * cxl_h_read_error_state - Checks the error state of the coherent |
| 284 | * platform function. |
| 285 | * R4 contains the error state |
| 286 | */ |
| 287 | long cxl_h_read_error_state(u64 unit_address, u64 *state) |
| 288 | { |
| 289 | return cxl_h_control_function(unit_address, |
| 290 | H_CONTROL_CA_FUNCTION_READ_ERR_STATE, |
| 291 | 0, 0, 0, 0, |
| 292 | state); |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * cxl_h_get_afu_err - collect the AFU error buffer |
| 297 | * Parameter1 = byte offset into error buffer to retrieve, valid values |
| 298 | * are between 0 and (ibm,error-buffer-size - 1) |
| 299 | * Parameter2 = 4K aligned real address of error buffer, to be filled in |
| 300 | * Parameter3 = length of error buffer, valid values are 4K or less |
| 301 | */ |
| 302 | long cxl_h_get_afu_err(u64 unit_address, u64 offset, |
| 303 | u64 buf_address, u64 len) |
| 304 | { |
| 305 | return cxl_h_control_function(unit_address, |
| 306 | H_CONTROL_CA_FUNCTION_GET_AFU_ERR, |
| 307 | offset, buf_address, len, 0, |
| 308 | NULL); |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * cxl_h_get_config - collect configuration record for the |
| 313 | * coherent platform function |
| 314 | * Parameter1 = # of configuration record to retrieve, valid values are |
| 315 | * between 0 and (ibm,#config-records - 1) |
| 316 | * Parameter2 = byte offset into configuration record to retrieve, |
| 317 | * valid values are between 0 and (ibm,config-record-size - 1) |
| 318 | * Parameter3 = 4K aligned real address of configuration record buffer, |
| 319 | * to be filled in |
| 320 | * Parameter4 = length of configuration buffer, valid values are 4K or less |
| 321 | */ |
| 322 | long cxl_h_get_config(u64 unit_address, u64 cr_num, u64 offset, |
| 323 | u64 buf_address, u64 len) |
| 324 | { |
| 325 | return cxl_h_control_function(unit_address, |
| 326 | H_CONTROL_CA_FUNCTION_GET_CONFIG, |
| 327 | cr_num, offset, buf_address, len, |
| 328 | NULL); |
| 329 | } |
| 330 | |
| 331 | /** |
| 332 | * cxl_h_terminate_process - Terminate the process before completion |
| 333 | * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when |
| 334 | * process was attached. |
| 335 | */ |
| 336 | long cxl_h_terminate_process(u64 unit_address, u64 process_token) |
| 337 | { |
| 338 | return cxl_h_control_function(unit_address, |
| 339 | H_CONTROL_CA_FUNCTION_TERMINATE_PROCESS, |
| 340 | process_token, 0, 0, 0, |
| 341 | NULL); |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * cxl_h_collect_vpd - Collect VPD for the coherent platform function. |
| 346 | * Parameter1 = # of VPD record to retrieve, valid values are between 0 |
| 347 | * and (ibm,#config-records - 1). |
| 348 | * Parameter2 = 4K naturally aligned real buffer containing block |
| 349 | * list entries |
| 350 | * Parameter3 = number of block list entries in the block list, valid |
| 351 | * values are between 0 and 256 |
| 352 | */ |
| 353 | long cxl_h_collect_vpd(u64 unit_address, u64 record, u64 list_address, |
| 354 | u64 num, u64 *out) |
| 355 | { |
| 356 | return cxl_h_control_function(unit_address, |
| 357 | H_CONTROL_CA_FUNCTION_COLLECT_VPD, |
| 358 | record, list_address, num, 0, |
| 359 | out); |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * cxl_h_get_fn_error_interrupt - Read the function-wide error data based on an interrupt |
| 364 | */ |
| 365 | long cxl_h_get_fn_error_interrupt(u64 unit_address, u64 *reg) |
| 366 | { |
| 367 | return cxl_h_control_function(unit_address, |
| 368 | H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT, |
| 369 | 0, 0, 0, 0, reg); |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * cxl_h_ack_fn_error_interrupt - Acknowledge function-wide error data |
| 374 | * based on an interrupt |
| 375 | * Parameter1 = value to write to the function-wide error interrupt register |
| 376 | */ |
| 377 | long cxl_h_ack_fn_error_interrupt(u64 unit_address, u64 value) |
| 378 | { |
| 379 | return cxl_h_control_function(unit_address, |
| 380 | H_CONTROL_CA_FUNCTION_ACK_FUNCTION_ERR_INT, |
| 381 | value, 0, 0, 0, |
| 382 | NULL); |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * cxl_h_get_error_log - Retrieve the Platform Log ID (PLID) of |
| 387 | * an error log |
| 388 | */ |
| 389 | long cxl_h_get_error_log(u64 unit_address, u64 value) |
| 390 | { |
| 391 | return cxl_h_control_function(unit_address, |
| 392 | H_CONTROL_CA_FUNCTION_GET_ERROR_LOG, |
| 393 | 0, 0, 0, 0, |
| 394 | NULL); |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * cxl_h_collect_int_info - Collect interrupt info about a coherent |
| 399 | * platform function after an interrupt occurred. |
| 400 | */ |
| 401 | long cxl_h_collect_int_info(u64 unit_address, u64 process_token, |
| 402 | struct cxl_irq_info *info) |
| 403 | { |
| 404 | long rc; |
| 405 | |
| 406 | BUG_ON(sizeof(*info) != sizeof(unsigned long[PLPAR_HCALL9_BUFSIZE])); |
| 407 | |
| 408 | rc = plpar_hcall9(H_COLLECT_CA_INT_INFO, (unsigned long *) info, |
| 409 | unit_address, process_token); |
| 410 | _PRINT_MSG(rc, "cxl_h_collect_int_info(%#.16llx, 0x%llx): %li\n", |
| 411 | unit_address, process_token, rc); |
Christophe Lombard | e7a801a | 2016-03-04 12:26:42 +0100 | [diff] [blame] | 412 | trace_cxl_hcall_collect_int_info(unit_address, process_token, rc); |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 413 | |
| 414 | switch (rc) { |
| 415 | case H_SUCCESS: /* The interrupt info is returned in return registers. */ |
| 416 | pr_devel("dsisr:%#llx, dar:%#llx, dsr:%#llx, pid:%u, tid:%u, afu_err:%#llx, errstat:%#llx\n", |
| 417 | info->dsisr, info->dar, info->dsr, info->pid, |
| 418 | info->tid, info->afu_err, info->errstat); |
| 419 | return 0; |
| 420 | case H_PARAMETER: /* An incorrect parameter was supplied. */ |
| 421 | return -EINVAL; |
| 422 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall. */ |
| 423 | case H_HARDWARE: /* A hardware event prevented the collection of the interrupt info.*/ |
| 424 | case H_STATE: /* The coherent platform function is not in a valid state to collect interrupt info. */ |
| 425 | return -EBUSY; |
| 426 | default: |
| 427 | WARN(1, "Unexpected return code: %lx", rc); |
| 428 | return -EINVAL; |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * cxl_h_control_faults - Control the operation of a coherent platform |
| 434 | * function after a fault occurs. |
| 435 | * |
| 436 | * Parameters |
| 437 | * control-mask: value to control the faults |
| 438 | * looks like PSL_TFC_An shifted >> 32 |
| 439 | * reset-mask: mask to control reset of function faults |
| 440 | * Set reset_mask = 1 to reset PSL errors |
| 441 | */ |
| 442 | long cxl_h_control_faults(u64 unit_address, u64 process_token, |
| 443 | u64 control_mask, u64 reset_mask) |
| 444 | { |
| 445 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
| 446 | long rc; |
| 447 | |
| 448 | memset(retbuf, 0, sizeof(retbuf)); |
| 449 | |
| 450 | rc = plpar_hcall(H_CONTROL_CA_FAULTS, retbuf, unit_address, |
| 451 | H_CONTROL_CA_FAULTS_RESPOND_PSL, process_token, |
| 452 | control_mask, reset_mask); |
| 453 | _PRINT_MSG(rc, "cxl_h_control_faults(%#.16llx, 0x%llx, %#llx, %#llx): %li (%#lx)\n", |
| 454 | unit_address, process_token, control_mask, reset_mask, |
| 455 | rc, retbuf[0]); |
Christophe Lombard | e7a801a | 2016-03-04 12:26:42 +0100 | [diff] [blame] | 456 | trace_cxl_hcall_control_faults(unit_address, process_token, |
| 457 | control_mask, reset_mask, retbuf[0], rc); |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 458 | |
| 459 | switch (rc) { |
| 460 | case H_SUCCESS: /* Faults were successfully controlled for the function. */ |
| 461 | return 0; |
| 462 | case H_PARAMETER: /* An incorrect parameter was supplied. */ |
| 463 | return -EINVAL; |
| 464 | case H_HARDWARE: /* A hardware event prevented the control of faults. */ |
| 465 | case H_STATE: /* The function was in an invalid state. */ |
| 466 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall; the coherent platform facilities may need to be licensed. */ |
| 467 | return -EBUSY; |
| 468 | case H_FUNCTION: /* The function is not supported */ |
| 469 | case H_NOT_FOUND: /* The operation supplied was not valid */ |
| 470 | return -EINVAL; |
| 471 | default: |
| 472 | WARN(1, "Unexpected return code: %lx", rc); |
| 473 | return -EINVAL; |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | /** |
| 478 | * cxl_h_control_facility - This H_CONTROL_CA_FACILITY hypervisor call |
| 479 | * allows the partition to manipulate or query |
| 480 | * certain coherent platform facility behaviors. |
| 481 | */ |
| 482 | static long cxl_h_control_facility(u64 unit_address, u64 op, |
| 483 | u64 p1, u64 p2, u64 p3, u64 p4, u64 *out) |
| 484 | { |
| 485 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; |
| 486 | long rc; |
| 487 | |
| 488 | CXL_H9_WAIT_UNTIL_DONE(rc, retbuf, H_CONTROL_CA_FACILITY, unit_address, op, p1, p2, p3, p4); |
| 489 | _PRINT_MSG(rc, "cxl_h_control_facility(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n", |
| 490 | unit_address, OP_STR_CONTROL_ADAPTER(op), p1, p2, p3, p4, retbuf[0], rc); |
Christophe Lombard | e7a801a | 2016-03-04 12:26:42 +0100 | [diff] [blame] | 491 | trace_cxl_hcall_control_facility(unit_address, OP_STR_CONTROL_ADAPTER(op), p1, p2, p3, p4, retbuf[0], rc); |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 492 | |
| 493 | switch (rc) { |
| 494 | case H_SUCCESS: /* The operation is completed for the coherent platform facility */ |
| 495 | if (op == H_CONTROL_CA_FACILITY_COLLECT_VPD) |
| 496 | *out = retbuf[0]; |
| 497 | return 0; |
| 498 | case H_PARAMETER: /* An incorrect parameter was supplied. */ |
| 499 | case H_FUNCTION: /* The function is not supported. */ |
| 500 | case H_NOT_FOUND: /* The operation supplied was not valid */ |
| 501 | case H_NOT_AVAILABLE: /* The operation cannot be performed because the AFU has not been downloaded */ |
| 502 | case H_SG_LIST: /* An block list entry was invalid */ |
| 503 | return -EINVAL; |
| 504 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ |
| 505 | case H_RESOURCE: /* The function has page table mappings for MMIO */ |
| 506 | case H_HARDWARE: /* A hardware event prevented the attach operation */ |
| 507 | case H_STATE: /* The coherent platform facility is not in a valid state */ |
| 508 | case H_BUSY: |
| 509 | return -EBUSY; |
| 510 | default: |
| 511 | WARN(1, "Unexpected return code: %lx", rc); |
| 512 | return -EINVAL; |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | /** |
| 517 | * cxl_h_reset_adapter - Perform a reset to the coherent platform facility. |
| 518 | */ |
| 519 | long cxl_h_reset_adapter(u64 unit_address) |
| 520 | { |
| 521 | return cxl_h_control_facility(unit_address, |
| 522 | H_CONTROL_CA_FACILITY_RESET, |
| 523 | 0, 0, 0, 0, |
| 524 | NULL); |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * cxl_h_collect_vpd - Collect VPD for the coherent platform function. |
| 529 | * Parameter1 = 4K naturally aligned real buffer containing block |
| 530 | * list entries |
| 531 | * Parameter2 = number of block list entries in the block list, valid |
| 532 | * values are between 0 and 256 |
| 533 | */ |
| 534 | long cxl_h_collect_vpd_adapter(u64 unit_address, u64 list_address, |
| 535 | u64 num, u64 *out) |
| 536 | { |
| 537 | return cxl_h_control_facility(unit_address, |
| 538 | H_CONTROL_CA_FACILITY_COLLECT_VPD, |
| 539 | list_address, num, 0, 0, |
| 540 | out); |
| 541 | } |
| 542 | |
| 543 | /** |
| 544 | * cxl_h_download_facility - This H_DOWNLOAD_CA_FACILITY |
| 545 | * hypervisor call provide platform support for |
| 546 | * downloading a base adapter image to the coherent |
| 547 | * platform facility, and for validating the entire |
| 548 | * image after the download. |
| 549 | * Parameters |
| 550 | * op: operation to perform to the coherent platform function |
| 551 | * Download: operation = 1, the base image in the coherent platform |
| 552 | * facility is first erased, and then |
| 553 | * programmed using the image supplied |
| 554 | * in the scatter/gather list. |
| 555 | * Validate: operation = 2, the base image in the coherent platform |
| 556 | * facility is compared with the image |
| 557 | * supplied in the scatter/gather list. |
| 558 | * list_address: 4K naturally aligned real buffer containing |
| 559 | * scatter/gather list entries. |
| 560 | * num: number of block list entries in the scatter/gather list. |
| 561 | */ |
| 562 | static long cxl_h_download_facility(u64 unit_address, u64 op, |
| 563 | u64 list_address, u64 num, |
| 564 | u64 *out) |
| 565 | { |
| 566 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
| 567 | unsigned int delay, total_delay = 0; |
| 568 | u64 token = 0; |
| 569 | long rc; |
| 570 | |
| 571 | if (*out != 0) |
| 572 | token = *out; |
| 573 | |
| 574 | memset(retbuf, 0, sizeof(retbuf)); |
| 575 | while (1) { |
| 576 | rc = plpar_hcall(H_DOWNLOAD_CA_FACILITY, retbuf, |
| 577 | unit_address, op, list_address, num, |
| 578 | token); |
| 579 | token = retbuf[0]; |
| 580 | if (rc != H_BUSY && !H_IS_LONG_BUSY(rc)) |
| 581 | break; |
| 582 | |
| 583 | if (rc != H_BUSY) { |
| 584 | delay = get_longbusy_msecs(rc); |
| 585 | total_delay += delay; |
| 586 | if (total_delay > CXL_HCALL_TIMEOUT_DOWNLOAD) { |
| 587 | WARN(1, "Warning: Giving up waiting for CXL hcall " |
| 588 | "%#x after %u msec\n", |
| 589 | H_DOWNLOAD_CA_FACILITY, total_delay); |
| 590 | rc = H_BUSY; |
| 591 | break; |
| 592 | } |
| 593 | msleep(delay); |
| 594 | } |
| 595 | } |
| 596 | _PRINT_MSG(rc, "cxl_h_download_facility(%#.16llx, %s(%#llx, %#llx), %#lx): %li\n", |
| 597 | unit_address, OP_STR_DOWNLOAD_ADAPTER(op), list_address, num, retbuf[0], rc); |
Christophe Lombard | e7a801a | 2016-03-04 12:26:42 +0100 | [diff] [blame] | 598 | trace_cxl_hcall_download_facility(unit_address, OP_STR_DOWNLOAD_ADAPTER(op), list_address, num, retbuf[0], rc); |
Christophe Lombard | 444c4ba | 2016-03-04 12:26:34 +0100 | [diff] [blame] | 599 | |
| 600 | switch (rc) { |
| 601 | case H_SUCCESS: /* The operation is completed for the coherent platform facility */ |
| 602 | return 0; |
| 603 | case H_PARAMETER: /* An incorrect parameter was supplied */ |
| 604 | case H_FUNCTION: /* The function is not supported. */ |
| 605 | case H_SG_LIST: /* An block list entry was invalid */ |
| 606 | case H_BAD_DATA: /* Image verification failed */ |
| 607 | return -EINVAL; |
| 608 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ |
| 609 | case H_RESOURCE: /* The function has page table mappings for MMIO */ |
| 610 | case H_HARDWARE: /* A hardware event prevented the attach operation */ |
| 611 | case H_STATE: /* The coherent platform facility is not in a valid state */ |
| 612 | case H_BUSY: |
| 613 | return -EBUSY; |
| 614 | case H_CONTINUE: |
| 615 | *out = retbuf[0]; |
| 616 | return 1; /* More data is needed for the complete image */ |
| 617 | default: |
| 618 | WARN(1, "Unexpected return code: %lx", rc); |
| 619 | return -EINVAL; |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | /** |
| 624 | * cxl_h_download_adapter_image - Download the base image to the coherent |
| 625 | * platform facility. |
| 626 | */ |
| 627 | long cxl_h_download_adapter_image(u64 unit_address, |
| 628 | u64 list_address, u64 num, |
| 629 | u64 *out) |
| 630 | { |
| 631 | return cxl_h_download_facility(unit_address, |
| 632 | H_DOWNLOAD_CA_FACILITY_DOWNLOAD, |
| 633 | list_address, num, out); |
| 634 | } |
| 635 | |
| 636 | /** |
| 637 | * cxl_h_validate_adapter_image - Validate the base image in the coherent |
| 638 | * platform facility. |
| 639 | */ |
| 640 | long cxl_h_validate_adapter_image(u64 unit_address, |
| 641 | u64 list_address, u64 num, |
| 642 | u64 *out) |
| 643 | { |
| 644 | return cxl_h_download_facility(unit_address, |
| 645 | H_DOWNLOAD_CA_FACILITY_VALIDATE, |
| 646 | list_address, num, out); |
| 647 | } |