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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
444c4ba4 CL |
2 | /* |
3 | * Copyright 2015 IBM Corp. | |
444c4ba4 CL |
4 | */ |
5 | ||
6 | ||
7 | #include <linux/compiler.h> | |
8 | #include <linux/types.h> | |
9 | #include <linux/delay.h> | |
444c4ba4 CL |
10 | #include <asm/byteorder.h> |
11 | #include "hcalls.h" | |
e7a801ad | 12 | #include "trace.h" |
444c4ba4 CL |
13 | |
14 | #define CXL_HCALL_TIMEOUT 60000 | |
15 | #define CXL_HCALL_TIMEOUT_DOWNLOAD 120000 | |
16 | ||
17 | #define H_ATTACH_CA_PROCESS 0x344 | |
18 | #define H_CONTROL_CA_FUNCTION 0x348 | |
19 | #define H_DETACH_CA_PROCESS 0x34C | |
20 | #define H_COLLECT_CA_INT_INFO 0x350 | |
21 | #define H_CONTROL_CA_FAULTS 0x354 | |
22 | #define H_DOWNLOAD_CA_FUNCTION 0x35C | |
23 | #define H_DOWNLOAD_CA_FACILITY 0x364 | |
24 | #define H_CONTROL_CA_FACILITY 0x368 | |
25 | ||
26 | #define H_CONTROL_CA_FUNCTION_RESET 1 /* perform a reset */ | |
27 | #define H_CONTROL_CA_FUNCTION_SUSPEND_PROCESS 2 /* suspend a process from being executed */ | |
28 | #define H_CONTROL_CA_FUNCTION_RESUME_PROCESS 3 /* resume a process to be executed */ | |
29 | #define H_CONTROL_CA_FUNCTION_READ_ERR_STATE 4 /* read the error state */ | |
30 | #define H_CONTROL_CA_FUNCTION_GET_AFU_ERR 5 /* collect the AFU error buffer */ | |
31 | #define H_CONTROL_CA_FUNCTION_GET_CONFIG 6 /* collect configuration record */ | |
32 | #define H_CONTROL_CA_FUNCTION_GET_DOWNLOAD_STATE 7 /* query to return download status */ | |
33 | #define H_CONTROL_CA_FUNCTION_TERMINATE_PROCESS 8 /* terminate the process before completion */ | |
34 | #define H_CONTROL_CA_FUNCTION_COLLECT_VPD 9 /* collect VPD */ | |
35 | #define H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT 11 /* read the function-wide error data based on an interrupt */ | |
36 | #define H_CONTROL_CA_FUNCTION_ACK_FUNCTION_ERR_INT 12 /* acknowledge function-wide error data based on an interrupt */ | |
37 | #define H_CONTROL_CA_FUNCTION_GET_ERROR_LOG 13 /* retrieve the Platform Log ID (PLID) of an error log */ | |
38 | ||
39 | #define H_CONTROL_CA_FAULTS_RESPOND_PSL 1 | |
40 | #define H_CONTROL_CA_FAULTS_RESPOND_AFU 2 | |
41 | ||
42 | #define H_CONTROL_CA_FACILITY_RESET 1 /* perform a reset */ | |
43 | #define H_CONTROL_CA_FACILITY_COLLECT_VPD 2 /* collect VPD */ | |
44 | ||
45 | #define H_DOWNLOAD_CA_FACILITY_DOWNLOAD 1 /* download adapter image */ | |
46 | #define H_DOWNLOAD_CA_FACILITY_VALIDATE 2 /* validate adapter image */ | |
47 | ||
48 | ||
49 | #define _CXL_LOOP_HCALL(call, rc, retbuf, fn, ...) \ | |
50 | { \ | |
51 | unsigned int delay, total_delay = 0; \ | |
52 | u64 token = 0; \ | |
53 | \ | |
54 | memset(retbuf, 0, sizeof(retbuf)); \ | |
55 | while (1) { \ | |
56 | rc = call(fn, retbuf, __VA_ARGS__, token); \ | |
57 | token = retbuf[0]; \ | |
58 | if (rc != H_BUSY && !H_IS_LONG_BUSY(rc)) \ | |
59 | break; \ | |
60 | \ | |
61 | if (rc == H_BUSY) \ | |
62 | delay = 10; \ | |
63 | else \ | |
64 | delay = get_longbusy_msecs(rc); \ | |
65 | \ | |
66 | total_delay += delay; \ | |
67 | if (total_delay > CXL_HCALL_TIMEOUT) { \ | |
68 | WARN(1, "Warning: Giving up waiting for CXL hcall " \ | |
69 | "%#x after %u msec\n", fn, total_delay); \ | |
70 | rc = H_BUSY; \ | |
71 | break; \ | |
72 | } \ | |
73 | msleep(delay); \ | |
74 | } \ | |
75 | } | |
76 | #define CXL_H_WAIT_UNTIL_DONE(...) _CXL_LOOP_HCALL(plpar_hcall, __VA_ARGS__) | |
77 | #define CXL_H9_WAIT_UNTIL_DONE(...) _CXL_LOOP_HCALL(plpar_hcall9, __VA_ARGS__) | |
78 | ||
79 | #define _PRINT_MSG(rc, format, ...) \ | |
80 | { \ | |
81 | if ((rc != H_SUCCESS) && (rc != H_CONTINUE)) \ | |
82 | pr_err(format, __VA_ARGS__); \ | |
83 | else \ | |
84 | pr_devel(format, __VA_ARGS__); \ | |
85 | } \ | |
86 | ||
87 | ||
88 | static char *afu_op_names[] = { | |
89 | "UNKNOWN_OP", /* 0 undefined */ | |
90 | "RESET", /* 1 */ | |
91 | "SUSPEND_PROCESS", /* 2 */ | |
92 | "RESUME_PROCESS", /* 3 */ | |
93 | "READ_ERR_STATE", /* 4 */ | |
94 | "GET_AFU_ERR", /* 5 */ | |
95 | "GET_CONFIG", /* 6 */ | |
96 | "GET_DOWNLOAD_STATE", /* 7 */ | |
97 | "TERMINATE_PROCESS", /* 8 */ | |
98 | "COLLECT_VPD", /* 9 */ | |
99 | "UNKNOWN_OP", /* 10 undefined */ | |
100 | "GET_FUNCTION_ERR_INT", /* 11 */ | |
101 | "ACK_FUNCTION_ERR_INT", /* 12 */ | |
102 | "GET_ERROR_LOG", /* 13 */ | |
103 | }; | |
104 | ||
105 | static char *control_adapter_op_names[] = { | |
106 | "UNKNOWN_OP", /* 0 undefined */ | |
107 | "RESET", /* 1 */ | |
108 | "COLLECT_VPD", /* 2 */ | |
109 | }; | |
110 | ||
111 | static char *download_op_names[] = { | |
112 | "UNKNOWN_OP", /* 0 undefined */ | |
113 | "DOWNLOAD", /* 1 */ | |
114 | "VALIDATE", /* 2 */ | |
115 | }; | |
116 | ||
117 | static char *op_str(unsigned int op, char *name_array[], int array_len) | |
118 | { | |
119 | if (op >= array_len) | |
120 | return "UNKNOWN_OP"; | |
121 | return name_array[op]; | |
122 | } | |
123 | ||
124 | #define OP_STR(op, name_array) op_str(op, name_array, ARRAY_SIZE(name_array)) | |
125 | ||
126 | #define OP_STR_AFU(op) OP_STR(op, afu_op_names) | |
127 | #define OP_STR_CONTROL_ADAPTER(op) OP_STR(op, control_adapter_op_names) | |
128 | #define OP_STR_DOWNLOAD_ADAPTER(op) OP_STR(op, download_op_names) | |
129 | ||
130 | ||
131 | long cxl_h_attach_process(u64 unit_address, | |
132 | struct cxl_process_element_hcall *element, | |
133 | u64 *process_token, u64 *mmio_addr, u64 *mmio_size) | |
134 | { | |
135 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; | |
136 | long rc; | |
137 | ||
138 | CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_ATTACH_CA_PROCESS, unit_address, virt_to_phys(element)); | |
139 | _PRINT_MSG(rc, "cxl_h_attach_process(%#.16llx, %#.16lx): %li\n", | |
140 | unit_address, virt_to_phys(element), rc); | |
e7a801ad | 141 | trace_cxl_hcall_attach(unit_address, virt_to_phys(element), retbuf[0], retbuf[1], retbuf[2], rc); |
444c4ba4 CL |
142 | |
143 | pr_devel("token: 0x%.8lx mmio_addr: 0x%lx mmio_size: 0x%lx\nProcess Element Structure:\n", | |
144 | retbuf[0], retbuf[1], retbuf[2]); | |
145 | cxl_dump_debug_buffer(element, sizeof(*element)); | |
146 | ||
147 | switch (rc) { | |
148 | case H_SUCCESS: /* The process info is attached to the coherent platform function */ | |
149 | *process_token = retbuf[0]; | |
150 | if (mmio_addr) | |
151 | *mmio_addr = retbuf[1]; | |
152 | if (mmio_size) | |
153 | *mmio_size = retbuf[2]; | |
154 | return 0; | |
155 | case H_PARAMETER: /* An incorrect parameter was supplied. */ | |
156 | case H_FUNCTION: /* The function is not supported. */ | |
157 | return -EINVAL; | |
158 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ | |
159 | case H_RESOURCE: /* The coherent platform function does not have enough additional resource to attach the process */ | |
160 | case H_HARDWARE: /* A hardware event prevented the attach operation */ | |
161 | case H_STATE: /* The coherent platform function is not in a valid state */ | |
162 | case H_BUSY: | |
163 | return -EBUSY; | |
164 | default: | |
165 | WARN(1, "Unexpected return code: %lx", rc); | |
166 | return -EINVAL; | |
167 | } | |
168 | } | |
169 | ||
170 | /** | |
171 | * cxl_h_detach_process - Detach a process element from a coherent | |
172 | * platform function. | |
173 | */ | |
174 | long cxl_h_detach_process(u64 unit_address, u64 process_token) | |
175 | { | |
176 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; | |
177 | long rc; | |
178 | ||
179 | CXL_H_WAIT_UNTIL_DONE(rc, retbuf, H_DETACH_CA_PROCESS, unit_address, process_token); | |
180 | _PRINT_MSG(rc, "cxl_h_detach_process(%#.16llx, 0x%.8llx): %li\n", unit_address, process_token, rc); | |
e7a801ad | 181 | trace_cxl_hcall_detach(unit_address, process_token, rc); |
444c4ba4 CL |
182 | |
183 | switch (rc) { | |
184 | case H_SUCCESS: /* The process was detached from the coherent platform function */ | |
185 | return 0; | |
186 | case H_PARAMETER: /* An incorrect parameter was supplied. */ | |
187 | return -EINVAL; | |
188 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ | |
189 | case H_RESOURCE: /* The function has page table mappings for MMIO */ | |
190 | case H_HARDWARE: /* A hardware event prevented the detach operation */ | |
191 | case H_STATE: /* The coherent platform function is not in a valid state */ | |
192 | case H_BUSY: | |
193 | return -EBUSY; | |
194 | default: | |
195 | WARN(1, "Unexpected return code: %lx", rc); | |
196 | return -EINVAL; | |
197 | } | |
198 | } | |
199 | ||
200 | /** | |
201 | * cxl_h_control_function - This H_CONTROL_CA_FUNCTION hypervisor call allows | |
202 | * the partition to manipulate or query | |
203 | * certain coherent platform function behaviors. | |
204 | */ | |
205 | static long cxl_h_control_function(u64 unit_address, u64 op, | |
206 | u64 p1, u64 p2, u64 p3, u64 p4, u64 *out) | |
207 | { | |
208 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; | |
209 | long rc; | |
210 | ||
211 | CXL_H9_WAIT_UNTIL_DONE(rc, retbuf, H_CONTROL_CA_FUNCTION, unit_address, op, p1, p2, p3, p4); | |
212 | _PRINT_MSG(rc, "cxl_h_control_function(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n", | |
213 | unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc); | |
e7a801ad | 214 | trace_cxl_hcall_control_function(unit_address, OP_STR_AFU(op), p1, p2, p3, p4, retbuf[0], rc); |
444c4ba4 CL |
215 | |
216 | switch (rc) { | |
217 | case H_SUCCESS: /* The operation is completed for the coherent platform function */ | |
218 | if ((op == H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT || | |
219 | op == H_CONTROL_CA_FUNCTION_READ_ERR_STATE || | |
220 | op == H_CONTROL_CA_FUNCTION_COLLECT_VPD)) | |
221 | *out = retbuf[0]; | |
222 | return 0; | |
223 | case H_PARAMETER: /* An incorrect parameter was supplied. */ | |
224 | case H_FUNCTION: /* The function is not supported. */ | |
225 | case H_NOT_FOUND: /* The operation supplied was not valid */ | |
226 | case H_NOT_AVAILABLE: /* The operation cannot be performed because the AFU has not been downloaded */ | |
227 | case H_SG_LIST: /* An block list entry was invalid */ | |
228 | return -EINVAL; | |
229 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ | |
230 | case H_RESOURCE: /* The function has page table mappings for MMIO */ | |
231 | case H_HARDWARE: /* A hardware event prevented the attach operation */ | |
232 | case H_STATE: /* The coherent platform function is not in a valid state */ | |
233 | case H_BUSY: | |
234 | return -EBUSY; | |
235 | default: | |
236 | WARN(1, "Unexpected return code: %lx", rc); | |
237 | return -EINVAL; | |
238 | } | |
239 | } | |
240 | ||
241 | /** | |
242 | * cxl_h_reset_afu - Perform a reset to the coherent platform function. | |
243 | */ | |
244 | long cxl_h_reset_afu(u64 unit_address) | |
245 | { | |
246 | return cxl_h_control_function(unit_address, | |
247 | H_CONTROL_CA_FUNCTION_RESET, | |
248 | 0, 0, 0, 0, | |
249 | NULL); | |
250 | } | |
251 | ||
252 | /** | |
253 | * cxl_h_suspend_process - Suspend a process from being executed | |
254 | * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when | |
255 | * process was attached. | |
256 | */ | |
257 | long cxl_h_suspend_process(u64 unit_address, u64 process_token) | |
258 | { | |
259 | return cxl_h_control_function(unit_address, | |
260 | H_CONTROL_CA_FUNCTION_SUSPEND_PROCESS, | |
261 | process_token, 0, 0, 0, | |
262 | NULL); | |
263 | } | |
264 | ||
265 | /** | |
266 | * cxl_h_resume_process - Resume a process to be executed | |
267 | * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when | |
268 | * process was attached. | |
269 | */ | |
270 | long cxl_h_resume_process(u64 unit_address, u64 process_token) | |
271 | { | |
272 | return cxl_h_control_function(unit_address, | |
273 | H_CONTROL_CA_FUNCTION_RESUME_PROCESS, | |
274 | process_token, 0, 0, 0, | |
275 | NULL); | |
276 | } | |
277 | ||
278 | /** | |
279 | * cxl_h_read_error_state - Checks the error state of the coherent | |
280 | * platform function. | |
281 | * R4 contains the error state | |
282 | */ | |
283 | long cxl_h_read_error_state(u64 unit_address, u64 *state) | |
284 | { | |
285 | return cxl_h_control_function(unit_address, | |
286 | H_CONTROL_CA_FUNCTION_READ_ERR_STATE, | |
287 | 0, 0, 0, 0, | |
288 | state); | |
289 | } | |
290 | ||
291 | /** | |
292 | * cxl_h_get_afu_err - collect the AFU error buffer | |
293 | * Parameter1 = byte offset into error buffer to retrieve, valid values | |
294 | * are between 0 and (ibm,error-buffer-size - 1) | |
295 | * Parameter2 = 4K aligned real address of error buffer, to be filled in | |
296 | * Parameter3 = length of error buffer, valid values are 4K or less | |
297 | */ | |
298 | long cxl_h_get_afu_err(u64 unit_address, u64 offset, | |
299 | u64 buf_address, u64 len) | |
300 | { | |
301 | return cxl_h_control_function(unit_address, | |
302 | H_CONTROL_CA_FUNCTION_GET_AFU_ERR, | |
303 | offset, buf_address, len, 0, | |
304 | NULL); | |
305 | } | |
306 | ||
307 | /** | |
308 | * cxl_h_get_config - collect configuration record for the | |
309 | * coherent platform function | |
310 | * Parameter1 = # of configuration record to retrieve, valid values are | |
311 | * between 0 and (ibm,#config-records - 1) | |
312 | * Parameter2 = byte offset into configuration record to retrieve, | |
313 | * valid values are between 0 and (ibm,config-record-size - 1) | |
314 | * Parameter3 = 4K aligned real address of configuration record buffer, | |
315 | * to be filled in | |
316 | * Parameter4 = length of configuration buffer, valid values are 4K or less | |
317 | */ | |
318 | long cxl_h_get_config(u64 unit_address, u64 cr_num, u64 offset, | |
319 | u64 buf_address, u64 len) | |
320 | { | |
321 | return cxl_h_control_function(unit_address, | |
322 | H_CONTROL_CA_FUNCTION_GET_CONFIG, | |
323 | cr_num, offset, buf_address, len, | |
324 | NULL); | |
325 | } | |
326 | ||
327 | /** | |
328 | * cxl_h_terminate_process - Terminate the process before completion | |
329 | * Parameter1 = process-token as returned from H_ATTACH_CA_PROCESS when | |
330 | * process was attached. | |
331 | */ | |
332 | long cxl_h_terminate_process(u64 unit_address, u64 process_token) | |
333 | { | |
334 | return cxl_h_control_function(unit_address, | |
335 | H_CONTROL_CA_FUNCTION_TERMINATE_PROCESS, | |
336 | process_token, 0, 0, 0, | |
337 | NULL); | |
338 | } | |
339 | ||
340 | /** | |
341 | * cxl_h_collect_vpd - Collect VPD for the coherent platform function. | |
342 | * Parameter1 = # of VPD record to retrieve, valid values are between 0 | |
343 | * and (ibm,#config-records - 1). | |
344 | * Parameter2 = 4K naturally aligned real buffer containing block | |
345 | * list entries | |
346 | * Parameter3 = number of block list entries in the block list, valid | |
347 | * values are between 0 and 256 | |
348 | */ | |
349 | long cxl_h_collect_vpd(u64 unit_address, u64 record, u64 list_address, | |
350 | u64 num, u64 *out) | |
351 | { | |
352 | return cxl_h_control_function(unit_address, | |
353 | H_CONTROL_CA_FUNCTION_COLLECT_VPD, | |
354 | record, list_address, num, 0, | |
355 | out); | |
356 | } | |
357 | ||
358 | /** | |
359 | * cxl_h_get_fn_error_interrupt - Read the function-wide error data based on an interrupt | |
360 | */ | |
361 | long cxl_h_get_fn_error_interrupt(u64 unit_address, u64 *reg) | |
362 | { | |
363 | return cxl_h_control_function(unit_address, | |
364 | H_CONTROL_CA_FUNCTION_GET_FUNCTION_ERR_INT, | |
365 | 0, 0, 0, 0, reg); | |
366 | } | |
367 | ||
368 | /** | |
369 | * cxl_h_ack_fn_error_interrupt - Acknowledge function-wide error data | |
370 | * based on an interrupt | |
371 | * Parameter1 = value to write to the function-wide error interrupt register | |
372 | */ | |
373 | long cxl_h_ack_fn_error_interrupt(u64 unit_address, u64 value) | |
374 | { | |
375 | return cxl_h_control_function(unit_address, | |
376 | H_CONTROL_CA_FUNCTION_ACK_FUNCTION_ERR_INT, | |
377 | value, 0, 0, 0, | |
378 | NULL); | |
379 | } | |
380 | ||
381 | /** | |
382 | * cxl_h_get_error_log - Retrieve the Platform Log ID (PLID) of | |
383 | * an error log | |
384 | */ | |
385 | long cxl_h_get_error_log(u64 unit_address, u64 value) | |
386 | { | |
387 | return cxl_h_control_function(unit_address, | |
388 | H_CONTROL_CA_FUNCTION_GET_ERROR_LOG, | |
389 | 0, 0, 0, 0, | |
390 | NULL); | |
391 | } | |
392 | ||
393 | /** | |
394 | * cxl_h_collect_int_info - Collect interrupt info about a coherent | |
395 | * platform function after an interrupt occurred. | |
396 | */ | |
397 | long cxl_h_collect_int_info(u64 unit_address, u64 process_token, | |
398 | struct cxl_irq_info *info) | |
399 | { | |
400 | long rc; | |
401 | ||
402 | BUG_ON(sizeof(*info) != sizeof(unsigned long[PLPAR_HCALL9_BUFSIZE])); | |
403 | ||
404 | rc = plpar_hcall9(H_COLLECT_CA_INT_INFO, (unsigned long *) info, | |
405 | unit_address, process_token); | |
406 | _PRINT_MSG(rc, "cxl_h_collect_int_info(%#.16llx, 0x%llx): %li\n", | |
407 | unit_address, process_token, rc); | |
e7a801ad | 408 | trace_cxl_hcall_collect_int_info(unit_address, process_token, rc); |
444c4ba4 CL |
409 | |
410 | switch (rc) { | |
411 | case H_SUCCESS: /* The interrupt info is returned in return registers. */ | |
66ef20c7 CL |
412 | pr_devel("dsisr:%#llx, dar:%#llx, dsr:%#llx, pid_tid:%#llx, afu_err:%#llx, errstat:%#llx\n", |
413 | info->dsisr, info->dar, info->dsr, info->reserved, | |
414 | info->afu_err, info->errstat); | |
444c4ba4 CL |
415 | return 0; |
416 | case H_PARAMETER: /* An incorrect parameter was supplied. */ | |
417 | return -EINVAL; | |
418 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall. */ | |
419 | case H_HARDWARE: /* A hardware event prevented the collection of the interrupt info.*/ | |
420 | case H_STATE: /* The coherent platform function is not in a valid state to collect interrupt info. */ | |
421 | return -EBUSY; | |
422 | default: | |
423 | WARN(1, "Unexpected return code: %lx", rc); | |
424 | return -EINVAL; | |
425 | } | |
426 | } | |
427 | ||
428 | /** | |
429 | * cxl_h_control_faults - Control the operation of a coherent platform | |
430 | * function after a fault occurs. | |
431 | * | |
432 | * Parameters | |
433 | * control-mask: value to control the faults | |
434 | * looks like PSL_TFC_An shifted >> 32 | |
435 | * reset-mask: mask to control reset of function faults | |
436 | * Set reset_mask = 1 to reset PSL errors | |
437 | */ | |
438 | long cxl_h_control_faults(u64 unit_address, u64 process_token, | |
439 | u64 control_mask, u64 reset_mask) | |
440 | { | |
441 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; | |
442 | long rc; | |
443 | ||
444 | memset(retbuf, 0, sizeof(retbuf)); | |
445 | ||
446 | rc = plpar_hcall(H_CONTROL_CA_FAULTS, retbuf, unit_address, | |
447 | H_CONTROL_CA_FAULTS_RESPOND_PSL, process_token, | |
448 | control_mask, reset_mask); | |
449 | _PRINT_MSG(rc, "cxl_h_control_faults(%#.16llx, 0x%llx, %#llx, %#llx): %li (%#lx)\n", | |
450 | unit_address, process_token, control_mask, reset_mask, | |
451 | rc, retbuf[0]); | |
e7a801ad CL |
452 | trace_cxl_hcall_control_faults(unit_address, process_token, |
453 | control_mask, reset_mask, retbuf[0], rc); | |
444c4ba4 CL |
454 | |
455 | switch (rc) { | |
456 | case H_SUCCESS: /* Faults were successfully controlled for the function. */ | |
457 | return 0; | |
458 | case H_PARAMETER: /* An incorrect parameter was supplied. */ | |
459 | return -EINVAL; | |
460 | case H_HARDWARE: /* A hardware event prevented the control of faults. */ | |
461 | case H_STATE: /* The function was in an invalid state. */ | |
462 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall; the coherent platform facilities may need to be licensed. */ | |
463 | return -EBUSY; | |
464 | case H_FUNCTION: /* The function is not supported */ | |
465 | case H_NOT_FOUND: /* The operation supplied was not valid */ | |
466 | return -EINVAL; | |
467 | default: | |
468 | WARN(1, "Unexpected return code: %lx", rc); | |
469 | return -EINVAL; | |
470 | } | |
471 | } | |
472 | ||
473 | /** | |
474 | * cxl_h_control_facility - This H_CONTROL_CA_FACILITY hypervisor call | |
475 | * allows the partition to manipulate or query | |
476 | * certain coherent platform facility behaviors. | |
477 | */ | |
478 | static long cxl_h_control_facility(u64 unit_address, u64 op, | |
479 | u64 p1, u64 p2, u64 p3, u64 p4, u64 *out) | |
480 | { | |
481 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; | |
482 | long rc; | |
483 | ||
484 | CXL_H9_WAIT_UNTIL_DONE(rc, retbuf, H_CONTROL_CA_FACILITY, unit_address, op, p1, p2, p3, p4); | |
485 | _PRINT_MSG(rc, "cxl_h_control_facility(%#.16llx, %s(%#llx, %#llx, %#llx, %#llx, R4: %#lx)): %li\n", | |
486 | unit_address, OP_STR_CONTROL_ADAPTER(op), p1, p2, p3, p4, retbuf[0], rc); | |
e7a801ad | 487 | trace_cxl_hcall_control_facility(unit_address, OP_STR_CONTROL_ADAPTER(op), p1, p2, p3, p4, retbuf[0], rc); |
444c4ba4 CL |
488 | |
489 | switch (rc) { | |
490 | case H_SUCCESS: /* The operation is completed for the coherent platform facility */ | |
491 | if (op == H_CONTROL_CA_FACILITY_COLLECT_VPD) | |
492 | *out = retbuf[0]; | |
493 | return 0; | |
494 | case H_PARAMETER: /* An incorrect parameter was supplied. */ | |
495 | case H_FUNCTION: /* The function is not supported. */ | |
496 | case H_NOT_FOUND: /* The operation supplied was not valid */ | |
497 | case H_NOT_AVAILABLE: /* The operation cannot be performed because the AFU has not been downloaded */ | |
498 | case H_SG_LIST: /* An block list entry was invalid */ | |
499 | return -EINVAL; | |
500 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ | |
501 | case H_RESOURCE: /* The function has page table mappings for MMIO */ | |
502 | case H_HARDWARE: /* A hardware event prevented the attach operation */ | |
503 | case H_STATE: /* The coherent platform facility is not in a valid state */ | |
504 | case H_BUSY: | |
505 | return -EBUSY; | |
506 | default: | |
507 | WARN(1, "Unexpected return code: %lx", rc); | |
508 | return -EINVAL; | |
509 | } | |
510 | } | |
511 | ||
512 | /** | |
513 | * cxl_h_reset_adapter - Perform a reset to the coherent platform facility. | |
514 | */ | |
515 | long cxl_h_reset_adapter(u64 unit_address) | |
516 | { | |
517 | return cxl_h_control_facility(unit_address, | |
518 | H_CONTROL_CA_FACILITY_RESET, | |
519 | 0, 0, 0, 0, | |
520 | NULL); | |
521 | } | |
522 | ||
523 | /** | |
524 | * cxl_h_collect_vpd - Collect VPD for the coherent platform function. | |
525 | * Parameter1 = 4K naturally aligned real buffer containing block | |
526 | * list entries | |
527 | * Parameter2 = number of block list entries in the block list, valid | |
528 | * values are between 0 and 256 | |
529 | */ | |
530 | long cxl_h_collect_vpd_adapter(u64 unit_address, u64 list_address, | |
531 | u64 num, u64 *out) | |
532 | { | |
533 | return cxl_h_control_facility(unit_address, | |
534 | H_CONTROL_CA_FACILITY_COLLECT_VPD, | |
535 | list_address, num, 0, 0, | |
536 | out); | |
537 | } | |
538 | ||
539 | /** | |
540 | * cxl_h_download_facility - This H_DOWNLOAD_CA_FACILITY | |
541 | * hypervisor call provide platform support for | |
542 | * downloading a base adapter image to the coherent | |
543 | * platform facility, and for validating the entire | |
544 | * image after the download. | |
545 | * Parameters | |
546 | * op: operation to perform to the coherent platform function | |
547 | * Download: operation = 1, the base image in the coherent platform | |
548 | * facility is first erased, and then | |
549 | * programmed using the image supplied | |
550 | * in the scatter/gather list. | |
551 | * Validate: operation = 2, the base image in the coherent platform | |
552 | * facility is compared with the image | |
553 | * supplied in the scatter/gather list. | |
554 | * list_address: 4K naturally aligned real buffer containing | |
555 | * scatter/gather list entries. | |
556 | * num: number of block list entries in the scatter/gather list. | |
557 | */ | |
558 | static long cxl_h_download_facility(u64 unit_address, u64 op, | |
559 | u64 list_address, u64 num, | |
560 | u64 *out) | |
561 | { | |
562 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; | |
563 | unsigned int delay, total_delay = 0; | |
564 | u64 token = 0; | |
565 | long rc; | |
566 | ||
567 | if (*out != 0) | |
568 | token = *out; | |
569 | ||
570 | memset(retbuf, 0, sizeof(retbuf)); | |
571 | while (1) { | |
572 | rc = plpar_hcall(H_DOWNLOAD_CA_FACILITY, retbuf, | |
573 | unit_address, op, list_address, num, | |
574 | token); | |
575 | token = retbuf[0]; | |
576 | if (rc != H_BUSY && !H_IS_LONG_BUSY(rc)) | |
577 | break; | |
578 | ||
579 | if (rc != H_BUSY) { | |
580 | delay = get_longbusy_msecs(rc); | |
581 | total_delay += delay; | |
582 | if (total_delay > CXL_HCALL_TIMEOUT_DOWNLOAD) { | |
583 | WARN(1, "Warning: Giving up waiting for CXL hcall " | |
584 | "%#x after %u msec\n", | |
585 | H_DOWNLOAD_CA_FACILITY, total_delay); | |
586 | rc = H_BUSY; | |
587 | break; | |
588 | } | |
589 | msleep(delay); | |
590 | } | |
591 | } | |
592 | _PRINT_MSG(rc, "cxl_h_download_facility(%#.16llx, %s(%#llx, %#llx), %#lx): %li\n", | |
593 | unit_address, OP_STR_DOWNLOAD_ADAPTER(op), list_address, num, retbuf[0], rc); | |
e7a801ad | 594 | trace_cxl_hcall_download_facility(unit_address, OP_STR_DOWNLOAD_ADAPTER(op), list_address, num, retbuf[0], rc); |
444c4ba4 CL |
595 | |
596 | switch (rc) { | |
597 | case H_SUCCESS: /* The operation is completed for the coherent platform facility */ | |
598 | return 0; | |
599 | case H_PARAMETER: /* An incorrect parameter was supplied */ | |
600 | case H_FUNCTION: /* The function is not supported. */ | |
601 | case H_SG_LIST: /* An block list entry was invalid */ | |
602 | case H_BAD_DATA: /* Image verification failed */ | |
603 | return -EINVAL; | |
604 | case H_AUTHORITY: /* The partition does not have authority to perform this hcall */ | |
605 | case H_RESOURCE: /* The function has page table mappings for MMIO */ | |
606 | case H_HARDWARE: /* A hardware event prevented the attach operation */ | |
607 | case H_STATE: /* The coherent platform facility is not in a valid state */ | |
608 | case H_BUSY: | |
609 | return -EBUSY; | |
610 | case H_CONTINUE: | |
611 | *out = retbuf[0]; | |
612 | return 1; /* More data is needed for the complete image */ | |
613 | default: | |
614 | WARN(1, "Unexpected return code: %lx", rc); | |
615 | return -EINVAL; | |
616 | } | |
617 | } | |
618 | ||
619 | /** | |
620 | * cxl_h_download_adapter_image - Download the base image to the coherent | |
621 | * platform facility. | |
622 | */ | |
623 | long cxl_h_download_adapter_image(u64 unit_address, | |
624 | u64 list_address, u64 num, | |
625 | u64 *out) | |
626 | { | |
627 | return cxl_h_download_facility(unit_address, | |
628 | H_DOWNLOAD_CA_FACILITY_DOWNLOAD, | |
629 | list_address, num, out); | |
630 | } | |
631 | ||
632 | /** | |
633 | * cxl_h_validate_adapter_image - Validate the base image in the coherent | |
634 | * platform facility. | |
635 | */ | |
636 | long cxl_h_validate_adapter_image(u64 unit_address, | |
637 | u64 list_address, u64 num, | |
638 | u64 *out) | |
639 | { | |
640 | return cxl_h_download_facility(unit_address, | |
641 | H_DOWNLOAD_CA_FACILITY_VALIDATE, | |
642 | list_address, num, out); | |
643 | } |