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12e364b9 KC |
1 | /* visorchipset_main.c |
2 | * | |
6f14cc18 | 3 | * Copyright (C) 2010 - 2015 UNISYS CORPORATION |
12e364b9 KC |
4 | * All rights reserved. |
5 | * | |
6f14cc18 BR |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
12e364b9 KC |
9 | * |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
13 | * NON INFRINGEMENT. See the GNU General Public License for more | |
14 | * details. | |
15 | */ | |
16 | ||
55c67dca | 17 | #include <linux/acpi.h> |
c0a14641 | 18 | #include <linux/cdev.h> |
46168810 | 19 | #include <linux/ctype.h> |
e3420ed6 EA |
20 | #include <linux/fs.h> |
21 | #include <linux/mm.h> | |
12e364b9 KC |
22 | #include <linux/nls.h> |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/platform_device.h> | |
90addb02 | 25 | #include <linux/uuid.h> |
1ba00980 | 26 | #include <linux/crash_dump.h> |
12e364b9 | 27 | |
55c67dca PB |
28 | #include "version.h" |
29 | #include "visorbus.h" | |
30 | #include "visorbus_private.h" | |
5f3a7e36 | 31 | #include "vmcallinterface.h" |
55c67dca | 32 | |
12e364b9 | 33 | #define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c |
12e364b9 | 34 | |
12e364b9 KC |
35 | #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 |
36 | #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 | |
37 | ||
2c7e1d4e | 38 | #define MAX_CONTROLVM_PAYLOAD_BYTES (1024 * 128) |
2ee0deec PB |
39 | |
40 | #define VISORCHIPSET_MMAP_CONTROLCHANOFFSET 0x00000000 | |
41 | ||
d5b3f1dc EA |
42 | #define UNISYS_SPAR_LEAF_ID 0x40000000 |
43 | ||
44 | /* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ | |
45 | #define UNISYS_SPAR_ID_EBX 0x73696e55 | |
46 | #define UNISYS_SPAR_ID_ECX 0x70537379 | |
47 | #define UNISYS_SPAR_ID_EDX 0x34367261 | |
48 | ||
b615d628 JS |
49 | /* |
50 | * Module parameters | |
51 | */ | |
b615d628 | 52 | static int visorchipset_major; |
b615d628 | 53 | |
e3420ed6 EA |
54 | static int |
55 | visorchipset_open(struct inode *inode, struct file *file) | |
56 | { | |
e4feb2f2 | 57 | unsigned int minor_number = iminor(inode); |
e3420ed6 EA |
58 | |
59 | if (minor_number) | |
60 | return -ENODEV; | |
61 | file->private_data = NULL; | |
62 | return 0; | |
63 | } | |
64 | ||
65 | static int | |
66 | visorchipset_release(struct inode *inode, struct file *file) | |
67 | { | |
68 | return 0; | |
69 | } | |
70 | ||
ec17f452 DB |
71 | /* |
72 | * When the controlvm channel is idle for at least MIN_IDLE_SECONDS, | |
73 | * we switch to slow polling mode. As soon as we get a controlvm | |
74 | * message, we switch back to fast polling mode. | |
75 | */ | |
12e364b9 | 76 | #define MIN_IDLE_SECONDS 10 |
52063eca | 77 | static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
2ee0d052 EA |
78 | /* when we got our last controlvm message */ |
79 | static unsigned long most_recent_message_jiffies; | |
12e364b9 | 80 | |
46168810 EA |
81 | struct parser_context { |
82 | unsigned long allocbytes; | |
83 | unsigned long param_bytes; | |
84 | u8 *curr; | |
85 | unsigned long bytes_remaining; | |
86 | bool byte_stream; | |
87 | char data[0]; | |
88 | }; | |
89 | ||
9232d2d6 | 90 | static struct delayed_work periodic_controlvm_work; |
12e364b9 | 91 | |
e3420ed6 EA |
92 | static struct cdev file_cdev; |
93 | static struct visorchannel **file_controlvm_channel; | |
12e364b9 | 94 | |
c3d9a224 | 95 | static struct visorchannel *controlvm_channel; |
12e364b9 | 96 | |
84982fbf | 97 | /* Manages the request payload in the controlvm channel */ |
c1f834eb | 98 | struct visor_controlvm_payload_info { |
3103dc03 | 99 | u8 *ptr; /* pointer to base address of payload pool */ |
ec17f452 DB |
100 | u64 offset; /* |
101 | * offset from beginning of controlvm | |
2ee0d052 EA |
102 | * channel to beginning of payload * pool |
103 | */ | |
b3c55b13 | 104 | u32 bytes; /* number of bytes in payload pool */ |
c1f834eb JS |
105 | }; |
106 | ||
107 | static struct visor_controlvm_payload_info controlvm_payload_info; | |
c071b6f5 | 108 | static unsigned long controlvm_payload_bytes_buffered; |
12e364b9 | 109 | |
ec17f452 DB |
110 | /* |
111 | * The following globals are used to handle the scenario where we are unable to | |
112 | * offload the payload from a controlvm message due to memory requirements. In | |
12e364b9 KC |
113 | * this scenario, we simply stash the controlvm message, then attempt to |
114 | * process it again the next time controlvm_periodic_work() runs. | |
115 | */ | |
7166ed19 | 116 | static struct controlvm_message controlvm_pending_msg; |
c79b28f7 | 117 | static bool controlvm_pending_msg_valid; |
12e364b9 | 118 | |
ec17f452 DB |
119 | /* |
120 | * This describes a buffer and its current state of transfer (e.g., how many | |
12e364b9 KC |
121 | * bytes have already been supplied as putfile data, and how many bytes are |
122 | * remaining) for a putfile_request. | |
123 | */ | |
124 | struct putfile_active_buffer { | |
125 | /* a payload from a controlvm message, containing a file data buffer */ | |
317d9614 | 126 | struct parser_context *parser_ctx; |
12e364b9 | 127 | /* points within data area of parser_ctx to next byte of data */ |
12e364b9 KC |
128 | size_t bytes_remaining; |
129 | }; | |
130 | ||
131 | #define PUTFILE_REQUEST_SIG 0x0906101302281211 | |
ec17f452 DB |
132 | /* |
133 | * This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE | |
134 | * conversation. Structs of this type are dynamically linked into | |
12e364b9 KC |
135 | * <Putfile_request_list>. |
136 | */ | |
137 | struct putfile_request { | |
138 | u64 sig; /* PUTFILE_REQUEST_SIG */ | |
139 | ||
140 | /* header from original TransmitFile request */ | |
98d7b594 | 141 | struct controlvm_message_header controlvm_header; |
12e364b9 KC |
142 | |
143 | /* link to next struct putfile_request */ | |
144 | struct list_head next_putfile_request; | |
145 | ||
ec17f452 DB |
146 | /* |
147 | * head of putfile_buffer_entry list, which describes the data to be | |
12e364b9 KC |
148 | * supplied as putfile data; |
149 | * - this list is added to when controlvm messages come in that supply | |
150 | * file data | |
151 | * - this list is removed from via the hotplug program that is actually | |
2ee0d052 EA |
152 | * consuming these buffers to write as file data |
153 | */ | |
12e364b9 KC |
154 | struct list_head input_buffer_list; |
155 | spinlock_t req_list_lock; /* lock for input_buffer_list */ | |
156 | ||
157 | /* waiters for input_buffer_list to go non-empty */ | |
158 | wait_queue_head_t input_buffer_wq; | |
159 | ||
160 | /* data not yet read within current putfile_buffer_entry */ | |
161 | struct putfile_active_buffer active_buf; | |
162 | ||
ec17f452 DB |
163 | /* |
164 | * <0 = failed, 0 = in-progress, >0 = successful; | |
165 | * note that this must be set with req_list_lock, and if you set <0, | |
166 | * it is your responsibility to also free up all of the other objects | |
167 | * in this struct (like input_buffer_list, active_buf.parser_ctx) | |
168 | * before releasing the lock | |
169 | */ | |
12e364b9 KC |
170 | int completion_status; |
171 | }; | |
172 | ||
12e364b9 KC |
173 | struct parahotplug_request { |
174 | struct list_head list; | |
175 | int id; | |
176 | unsigned long expiration; | |
3ab47701 | 177 | struct controlvm_message msg; |
12e364b9 KC |
178 | }; |
179 | ||
ddf5de53 BR |
180 | static LIST_HEAD(parahotplug_request_list); |
181 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ | |
12e364b9 | 182 | |
12e364b9 | 183 | /* info for /dev/visorchipset */ |
ec17f452 | 184 | static dev_t major_dev = -1; /*< indicates major num for device */ |
12e364b9 | 185 | |
19f6634f BR |
186 | /* prototypes for attributes */ |
187 | static ssize_t toolaction_show(struct device *dev, | |
84efd207 DK |
188 | struct device_attribute *attr, |
189 | char *buf) | |
190 | { | |
191 | u8 tool_action = 0; | |
192 | ||
193 | visorchannel_read(controlvm_channel, | |
194 | offsetof(struct spar_controlvm_channel_protocol, | |
195 | tool_action), &tool_action, sizeof(u8)); | |
196 | return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action); | |
197 | } | |
198 | ||
19f6634f | 199 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 | 200 | struct device_attribute *attr, |
84efd207 DK |
201 | const char *buf, size_t count) |
202 | { | |
203 | u8 tool_action; | |
204 | int ret; | |
205 | ||
206 | if (kstrtou8(buf, 10, &tool_action)) | |
207 | return -EINVAL; | |
208 | ||
209 | ret = visorchannel_write | |
210 | (controlvm_channel, | |
211 | offsetof(struct spar_controlvm_channel_protocol, | |
212 | tool_action), | |
213 | &tool_action, sizeof(u8)); | |
214 | ||
215 | if (ret) | |
216 | return ret; | |
217 | return count; | |
218 | } | |
19f6634f BR |
219 | static DEVICE_ATTR_RW(toolaction); |
220 | ||
54b31229 | 221 | static ssize_t boottotool_show(struct device *dev, |
1b1d463d DK |
222 | struct device_attribute *attr, |
223 | char *buf) | |
224 | { | |
225 | struct efi_spar_indication efi_spar_indication; | |
226 | ||
227 | visorchannel_read(controlvm_channel, | |
228 | offsetof(struct spar_controlvm_channel_protocol, | |
229 | efi_spar_ind), &efi_spar_indication, | |
230 | sizeof(struct efi_spar_indication)); | |
231 | return scnprintf(buf, PAGE_SIZE, "%u\n", | |
232 | efi_spar_indication.boot_to_tool); | |
233 | } | |
234 | ||
54b31229 | 235 | static ssize_t boottotool_store(struct device *dev, |
1b1d463d DK |
236 | struct device_attribute *attr, |
237 | const char *buf, size_t count) | |
238 | { | |
239 | int val, ret; | |
240 | struct efi_spar_indication efi_spar_indication; | |
241 | ||
242 | if (kstrtoint(buf, 10, &val)) | |
243 | return -EINVAL; | |
244 | ||
245 | efi_spar_indication.boot_to_tool = val; | |
246 | ret = visorchannel_write | |
247 | (controlvm_channel, | |
248 | offsetof(struct spar_controlvm_channel_protocol, | |
249 | efi_spar_ind), &(efi_spar_indication), | |
250 | sizeof(struct efi_spar_indication)); | |
251 | ||
252 | if (ret) | |
253 | return ret; | |
254 | return count; | |
255 | } | |
54b31229 BR |
256 | static DEVICE_ATTR_RW(boottotool); |
257 | ||
422af17c | 258 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8a4a8a03 DK |
259 | char *buf) |
260 | { | |
261 | u32 error = 0; | |
262 | ||
263 | visorchannel_read(controlvm_channel, | |
264 | offsetof(struct spar_controlvm_channel_protocol, | |
265 | installation_error), | |
266 | &error, sizeof(u32)); | |
267 | return scnprintf(buf, PAGE_SIZE, "%i\n", error); | |
268 | } | |
269 | ||
422af17c | 270 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8a4a8a03 DK |
271 | const char *buf, size_t count) |
272 | { | |
273 | u32 error; | |
274 | int ret; | |
275 | ||
276 | if (kstrtou32(buf, 10, &error)) | |
277 | return -EINVAL; | |
278 | ||
279 | ret = visorchannel_write | |
280 | (controlvm_channel, | |
281 | offsetof(struct spar_controlvm_channel_protocol, | |
282 | installation_error), | |
283 | &error, sizeof(u32)); | |
284 | if (ret) | |
285 | return ret; | |
286 | return count; | |
287 | } | |
422af17c BR |
288 | static DEVICE_ATTR_RW(error); |
289 | ||
290 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
79730c7c DK |
291 | char *buf) |
292 | { | |
293 | u32 text_id = 0; | |
294 | ||
295 | visorchannel_read | |
296 | (controlvm_channel, | |
297 | offsetof(struct spar_controlvm_channel_protocol, | |
298 | installation_text_id), | |
299 | &text_id, sizeof(u32)); | |
300 | return scnprintf(buf, PAGE_SIZE, "%i\n", text_id); | |
301 | } | |
302 | ||
422af17c | 303 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
79730c7c DK |
304 | const char *buf, size_t count) |
305 | { | |
306 | u32 text_id; | |
307 | int ret; | |
308 | ||
309 | if (kstrtou32(buf, 10, &text_id)) | |
310 | return -EINVAL; | |
311 | ||
312 | ret = visorchannel_write | |
313 | (controlvm_channel, | |
314 | offsetof(struct spar_controlvm_channel_protocol, | |
315 | installation_text_id), | |
316 | &text_id, sizeof(u32)); | |
317 | if (ret) | |
318 | return ret; | |
319 | return count; | |
320 | } | |
422af17c BR |
321 | static DEVICE_ATTR_RW(textid); |
322 | ||
323 | static ssize_t remaining_steps_show(struct device *dev, | |
8e76e695 | 324 | struct device_attribute *attr, char *buf); |
422af17c | 325 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 BR |
326 | struct device_attribute *attr, |
327 | const char *buf, size_t count); | |
422af17c BR |
328 | static DEVICE_ATTR_RW(remaining_steps); |
329 | ||
e56fa7cd | 330 | static ssize_t devicedisabled_store(struct device *dev, |
8e76e695 BR |
331 | struct device_attribute *attr, |
332 | const char *buf, size_t count); | |
e56fa7cd BR |
333 | static DEVICE_ATTR_WO(devicedisabled); |
334 | ||
335 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
336 | struct device_attribute *attr, |
337 | const char *buf, size_t count); | |
e56fa7cd BR |
338 | static DEVICE_ATTR_WO(deviceenabled); |
339 | ||
19f6634f BR |
340 | static struct attribute *visorchipset_install_attrs[] = { |
341 | &dev_attr_toolaction.attr, | |
54b31229 | 342 | &dev_attr_boottotool.attr, |
422af17c BR |
343 | &dev_attr_error.attr, |
344 | &dev_attr_textid.attr, | |
345 | &dev_attr_remaining_steps.attr, | |
19f6634f BR |
346 | NULL |
347 | }; | |
348 | ||
349 | static struct attribute_group visorchipset_install_group = { | |
350 | .name = "install", | |
351 | .attrs = visorchipset_install_attrs | |
352 | }; | |
353 | ||
e56fa7cd BR |
354 | static struct attribute *visorchipset_parahotplug_attrs[] = { |
355 | &dev_attr_devicedisabled.attr, | |
356 | &dev_attr_deviceenabled.attr, | |
357 | NULL | |
358 | }; | |
359 | ||
360 | static struct attribute_group visorchipset_parahotplug_group = { | |
361 | .name = "parahotplug", | |
362 | .attrs = visorchipset_parahotplug_attrs | |
363 | }; | |
364 | ||
19f6634f BR |
365 | static const struct attribute_group *visorchipset_dev_groups[] = { |
366 | &visorchipset_install_group, | |
e56fa7cd | 367 | &visorchipset_parahotplug_group, |
19f6634f BR |
368 | NULL |
369 | }; | |
370 | ||
04dacacc DZ |
371 | static void visorchipset_dev_release(struct device *dev) |
372 | { | |
373 | } | |
374 | ||
12e364b9 | 375 | /* /sys/devices/platform/visorchipset */ |
eb34e877 | 376 | static struct platform_device visorchipset_platform_device = { |
12e364b9 KC |
377 | .name = "visorchipset", |
378 | .id = -1, | |
19f6634f | 379 | .dev.groups = visorchipset_dev_groups, |
04dacacc | 380 | .dev.release = visorchipset_dev_release, |
12e364b9 KC |
381 | }; |
382 | ||
464129ed | 383 | static uuid_le |
46168810 EA |
384 | parser_id_get(struct parser_context *ctx) |
385 | { | |
386 | struct spar_controlvm_parameters_header *phdr = NULL; | |
387 | ||
e4a3dd33 | 388 | if (!ctx) |
46168810 EA |
389 | return NULL_UUID_LE; |
390 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
391 | return phdr->id; | |
392 | } | |
393 | ||
ec17f452 DB |
394 | /* |
395 | * Describes the state from the perspective of which controlvm messages have | |
396 | * been received for a bus or device. | |
2ee0deec PB |
397 | */ |
398 | ||
399 | enum PARSER_WHICH_STRING { | |
400 | PARSERSTRING_INITIATOR, | |
401 | PARSERSTRING_TARGET, | |
402 | PARSERSTRING_CONNECTION, | |
403 | PARSERSTRING_NAME, /* TODO: only PARSERSTRING_NAME is used ? */ | |
404 | }; | |
405 | ||
464129ed | 406 | static void |
2ee0deec PB |
407 | parser_param_start(struct parser_context *ctx, |
408 | enum PARSER_WHICH_STRING which_string) | |
46168810 EA |
409 | { |
410 | struct spar_controlvm_parameters_header *phdr = NULL; | |
411 | ||
e4a3dd33 | 412 | if (!ctx) |
b4d4dfbc BR |
413 | return; |
414 | ||
46168810 EA |
415 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); |
416 | switch (which_string) { | |
417 | case PARSERSTRING_INITIATOR: | |
418 | ctx->curr = ctx->data + phdr->initiator_offset; | |
419 | ctx->bytes_remaining = phdr->initiator_length; | |
420 | break; | |
421 | case PARSERSTRING_TARGET: | |
422 | ctx->curr = ctx->data + phdr->target_offset; | |
423 | ctx->bytes_remaining = phdr->target_length; | |
424 | break; | |
425 | case PARSERSTRING_CONNECTION: | |
426 | ctx->curr = ctx->data + phdr->connection_offset; | |
427 | ctx->bytes_remaining = phdr->connection_length; | |
428 | break; | |
429 | case PARSERSTRING_NAME: | |
430 | ctx->curr = ctx->data + phdr->name_offset; | |
431 | ctx->bytes_remaining = phdr->name_length; | |
432 | break; | |
433 | default: | |
434 | break; | |
435 | } | |
46168810 EA |
436 | } |
437 | ||
464129ed | 438 | static void parser_done(struct parser_context *ctx) |
46168810 EA |
439 | { |
440 | if (!ctx) | |
441 | return; | |
442 | controlvm_payload_bytes_buffered -= ctx->param_bytes; | |
443 | kfree(ctx); | |
444 | } | |
445 | ||
464129ed | 446 | static void * |
46168810 EA |
447 | parser_string_get(struct parser_context *ctx) |
448 | { | |
449 | u8 *pscan; | |
450 | unsigned long nscan; | |
451 | int value_length = -1; | |
452 | void *value = NULL; | |
453 | int i; | |
454 | ||
455 | if (!ctx) | |
456 | return NULL; | |
457 | pscan = ctx->curr; | |
458 | nscan = ctx->bytes_remaining; | |
459 | if (nscan == 0) | |
460 | return NULL; | |
461 | if (!pscan) | |
462 | return NULL; | |
463 | for (i = 0, value_length = -1; i < nscan; i++) | |
464 | if (pscan[i] == '\0') { | |
465 | value_length = i; | |
466 | break; | |
467 | } | |
468 | if (value_length < 0) /* '\0' was not included in the length */ | |
469 | value_length = nscan; | |
8c395e74 | 470 | value = kmalloc(value_length + 1, GFP_KERNEL | __GFP_NORETRY); |
e4a3dd33 | 471 | if (!value) |
46168810 EA |
472 | return NULL; |
473 | if (value_length > 0) | |
474 | memcpy(value, pscan, value_length); | |
0e7bf2f4 | 475 | ((u8 *)(value))[value_length] = '\0'; |
46168810 EA |
476 | return value; |
477 | } | |
478 | ||
422af17c | 479 | static ssize_t remaining_steps_show(struct device *dev, |
8e76e695 | 480 | struct device_attribute *attr, char *buf) |
422af17c | 481 | { |
3a56d700 | 482 | u16 remaining_steps = 0; |
422af17c | 483 | |
c3d9a224 | 484 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
485 | offsetof(struct spar_controlvm_channel_protocol, |
486 | installation_remaining_steps), | |
487 | &remaining_steps, sizeof(u16)); | |
ee8da290 | 488 | return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps); |
422af17c BR |
489 | } |
490 | ||
491 | static ssize_t remaining_steps_store(struct device *dev, | |
8e76e695 BR |
492 | struct device_attribute *attr, |
493 | const char *buf, size_t count) | |
422af17c | 494 | { |
ee8da290 | 495 | u16 remaining_steps; |
66e24b76 | 496 | int ret; |
422af17c | 497 | |
ebec8967 | 498 | if (kstrtou16(buf, 10, &remaining_steps)) |
66e24b76 BR |
499 | return -EINVAL; |
500 | ||
a07d7c38 TS |
501 | ret = visorchannel_write |
502 | (controlvm_channel, | |
503 | offsetof(struct spar_controlvm_channel_protocol, | |
504 | installation_remaining_steps), | |
505 | &remaining_steps, sizeof(u16)); | |
66e24b76 BR |
506 | if (ret) |
507 | return ret; | |
e22a4a0f | 508 | return count; |
422af17c BR |
509 | } |
510 | ||
ab0592b9 DZ |
511 | struct visor_busdev { |
512 | u32 bus_no; | |
513 | u32 dev_no; | |
514 | }; | |
515 | ||
516 | static int match_visorbus_dev_by_id(struct device *dev, void *data) | |
517 | { | |
518 | struct visor_device *vdev = to_visor_device(dev); | |
7f44582e | 519 | struct visor_busdev *id = data; |
ab0592b9 DZ |
520 | u32 bus_no = id->bus_no; |
521 | u32 dev_no = id->dev_no; | |
522 | ||
65bd6e46 DZ |
523 | if ((vdev->chipset_bus_no == bus_no) && |
524 | (vdev->chipset_dev_no == dev_no)) | |
ab0592b9 DZ |
525 | return 1; |
526 | ||
527 | return 0; | |
528 | } | |
d1e08637 | 529 | |
ab0592b9 DZ |
530 | struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, |
531 | struct visor_device *from) | |
532 | { | |
533 | struct device *dev; | |
534 | struct device *dev_start = NULL; | |
535 | struct visor_device *vdev = NULL; | |
536 | struct visor_busdev id = { | |
537 | .bus_no = bus_no, | |
538 | .dev_no = dev_no | |
539 | }; | |
540 | ||
541 | if (from) | |
542 | dev_start = &from->device; | |
543 | dev = bus_find_device(&visorbus_type, dev_start, (void *)&id, | |
544 | match_visorbus_dev_by_id); | |
545 | if (dev) | |
546 | vdev = to_visor_device(dev); | |
547 | return vdev; | |
548 | } | |
ab0592b9 | 549 | |
5f251395 DK |
550 | static void |
551 | controlvm_init_response(struct controlvm_message *msg, | |
552 | struct controlvm_message_header *msg_hdr, int response) | |
553 | { | |
554 | memset(msg, 0, sizeof(struct controlvm_message)); | |
555 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); | |
556 | msg->hdr.payload_bytes = 0; | |
557 | msg->hdr.payload_vm_offset = 0; | |
558 | msg->hdr.payload_max_bytes = 0; | |
559 | if (response < 0) { | |
560 | msg->hdr.flags.failed = 1; | |
561 | msg->hdr.completion_status = (u32)(-response); | |
562 | } | |
563 | } | |
564 | ||
565 | static void | |
566 | controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, | |
567 | int response, | |
568 | enum ultra_chipset_feature features) | |
569 | { | |
570 | struct controlvm_message outmsg; | |
571 | ||
572 | controlvm_init_response(&outmsg, msg_hdr, response); | |
573 | outmsg.cmd.init_chipset.features = features; | |
574 | if (!visorchannel_signalinsert(controlvm_channel, | |
575 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { | |
576 | return; | |
577 | } | |
578 | } | |
579 | ||
12e364b9 | 580 | static void |
3ab47701 | 581 | chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
582 | { |
583 | static int chipset_inited; | |
b9b141e8 | 584 | enum ultra_chipset_feature features = 0; |
12e364b9 KC |
585 | int rc = CONTROLVM_RESP_SUCCESS; |
586 | ||
587 | POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
588 | if (chipset_inited) { | |
22ad57ba | 589 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
5233d1eb | 590 | goto out_respond; |
12e364b9 KC |
591 | } |
592 | chipset_inited = 1; | |
593 | POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); | |
594 | ||
ec17f452 DB |
595 | /* |
596 | * Set features to indicate we support parahotplug (if Command | |
2ee0d052 EA |
597 | * also supports it). |
598 | */ | |
12e364b9 | 599 | features = |
2ea5117b | 600 | inmsg->cmd.init_chipset. |
12e364b9 KC |
601 | features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; |
602 | ||
ec17f452 DB |
603 | /* |
604 | * Set the "reply" bit so Command knows this is a | |
2ee0d052 EA |
605 | * features-aware driver. |
606 | */ | |
12e364b9 KC |
607 | features |= ULTRA_CHIPSET_FEATURE_REPLY; |
608 | ||
5233d1eb | 609 | out_respond: |
98d7b594 | 610 | if (inmsg->hdr.flags.response_expected) |
12e364b9 KC |
611 | controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
612 | } | |
613 | ||
12e364b9 | 614 | static void |
b3168c70 | 615 | controlvm_respond(struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 616 | { |
3ab47701 | 617 | struct controlvm_message outmsg; |
26eb2c0c | 618 | |
b3168c70 | 619 | controlvm_init_response(&outmsg, msg_hdr, response); |
2098dbd1 | 620 | if (outmsg.hdr.flags.test_message == 1) |
12e364b9 | 621 | return; |
2098dbd1 | 622 | |
c3d9a224 | 623 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 624 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
625 | return; |
626 | } | |
627 | } | |
628 | ||
98d7b594 | 629 | static void controlvm_respond_physdev_changestate( |
b3168c70 | 630 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 631 | struct spar_segment_state state) |
12e364b9 | 632 | { |
3ab47701 | 633 | struct controlvm_message outmsg; |
26eb2c0c | 634 | |
b3168c70 | 635 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b BR |
636 | outmsg.cmd.device_change_state.state = state; |
637 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
c3d9a224 | 638 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 639 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
640 | return; |
641 | } | |
642 | } | |
643 | ||
2ee0deec PB |
644 | enum crash_obj_type { |
645 | CRASH_DEV, | |
646 | CRASH_BUS, | |
647 | }; | |
648 | ||
12c957dc TS |
649 | static void |
650 | save_crash_message(struct controlvm_message *msg, enum crash_obj_type typ) | |
651 | { | |
652 | u32 local_crash_msg_offset; | |
653 | u16 local_crash_msg_count; | |
654 | ||
655 | if (visorchannel_read(controlvm_channel, | |
656 | offsetof(struct spar_controlvm_channel_protocol, | |
657 | saved_crash_message_count), | |
658 | &local_crash_msg_count, sizeof(u16)) < 0) { | |
659 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, | |
660 | POSTCODE_SEVERITY_ERR); | |
661 | return; | |
662 | } | |
663 | ||
664 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { | |
665 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, | |
666 | local_crash_msg_count, | |
667 | POSTCODE_SEVERITY_ERR); | |
668 | return; | |
669 | } | |
670 | ||
671 | if (visorchannel_read(controlvm_channel, | |
672 | offsetof(struct spar_controlvm_channel_protocol, | |
673 | saved_crash_message_offset), | |
674 | &local_crash_msg_offset, sizeof(u32)) < 0) { | |
675 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, | |
676 | POSTCODE_SEVERITY_ERR); | |
677 | return; | |
678 | } | |
679 | ||
680 | if (typ == CRASH_BUS) { | |
681 | if (visorchannel_write(controlvm_channel, | |
682 | local_crash_msg_offset, | |
683 | msg, | |
684 | sizeof(struct controlvm_message)) < 0) { | |
685 | POSTCODE_LINUX_2(SAVE_MSG_BUS_FAILURE_PC, | |
686 | POSTCODE_SEVERITY_ERR); | |
687 | return; | |
688 | } | |
689 | } else { | |
690 | local_crash_msg_offset += sizeof(struct controlvm_message); | |
691 | if (visorchannel_write(controlvm_channel, | |
692 | local_crash_msg_offset, | |
693 | msg, | |
694 | sizeof(struct controlvm_message)) < 0) { | |
695 | POSTCODE_LINUX_2(SAVE_MSG_DEV_FAILURE_PC, | |
696 | POSTCODE_SEVERITY_ERR); | |
697 | return; | |
698 | } | |
699 | } | |
700 | } | |
701 | ||
12e364b9 | 702 | static void |
0274b5ae DZ |
703 | bus_responder(enum controlvm_id cmd_id, |
704 | struct controlvm_message_header *pending_msg_hdr, | |
3032aedd | 705 | int response) |
12e364b9 | 706 | { |
e4a3dd33 | 707 | if (!pending_msg_hdr) |
0274b5ae | 708 | return; /* no controlvm response needed */ |
12e364b9 | 709 | |
0274b5ae | 710 | if (pending_msg_hdr->id != (u32)cmd_id) |
12e364b9 | 711 | return; |
0aca7844 | 712 | |
0274b5ae | 713 | controlvm_respond(pending_msg_hdr, response); |
12e364b9 KC |
714 | } |
715 | ||
716 | static void | |
fbb31f48 | 717 | device_changestate_responder(enum controlvm_id cmd_id, |
a298bc0b | 718 | struct visor_device *p, int response, |
fbb31f48 | 719 | struct spar_segment_state response_state) |
12e364b9 | 720 | { |
3ab47701 | 721 | struct controlvm_message outmsg; |
a298bc0b DZ |
722 | u32 bus_no = p->chipset_bus_no; |
723 | u32 dev_no = p->chipset_dev_no; | |
12e364b9 | 724 | |
e4a3dd33 | 725 | if (!p->pending_msg_hdr) |
12e364b9 | 726 | return; /* no controlvm response needed */ |
0274b5ae | 727 | if (p->pending_msg_hdr->id != cmd_id) |
12e364b9 | 728 | return; |
12e364b9 | 729 | |
0274b5ae | 730 | controlvm_init_response(&outmsg, p->pending_msg_hdr, response); |
12e364b9 | 731 | |
fbb31f48 BR |
732 | outmsg.cmd.device_change_state.bus_no = bus_no; |
733 | outmsg.cmd.device_change_state.dev_no = dev_no; | |
734 | outmsg.cmd.device_change_state.state = response_state; | |
12e364b9 | 735 | |
c3d9a224 | 736 | if (!visorchannel_signalinsert(controlvm_channel, |
0aca7844 | 737 | CONTROLVM_QUEUE_REQUEST, &outmsg)) |
12e364b9 | 738 | return; |
12e364b9 KC |
739 | } |
740 | ||
741 | static void | |
0274b5ae DZ |
742 | device_responder(enum controlvm_id cmd_id, |
743 | struct controlvm_message_header *pending_msg_hdr, | |
b4b598fd | 744 | int response) |
12e364b9 | 745 | { |
e4a3dd33 | 746 | if (!pending_msg_hdr) |
12e364b9 | 747 | return; /* no controlvm response needed */ |
0aca7844 | 748 | |
0274b5ae | 749 | if (pending_msg_hdr->id != (u32)cmd_id) |
12e364b9 | 750 | return; |
0aca7844 | 751 | |
0274b5ae | 752 | controlvm_respond(pending_msg_hdr, response); |
12e364b9 KC |
753 | } |
754 | ||
755 | static void | |
d32517e3 | 756 | bus_epilog(struct visor_device *bus_info, |
2836c6a8 | 757 | u32 cmd, struct controlvm_message_header *msg_hdr, |
f4c11551 | 758 | int response, bool need_response) |
12e364b9 | 759 | { |
0274b5ae | 760 | struct controlvm_message_header *pmsg_hdr = NULL; |
12e364b9 | 761 | |
0274b5ae | 762 | if (!bus_info) { |
ec17f452 DB |
763 | /* |
764 | * relying on a valid passed in response code | |
765 | * be lazy and re-use msg_hdr for this failure, is this ok?? | |
766 | */ | |
0274b5ae | 767 | pmsg_hdr = msg_hdr; |
87241ab8 | 768 | goto out_respond; |
0274b5ae DZ |
769 | } |
770 | ||
771 | if (bus_info->pending_msg_hdr) { | |
772 | /* only non-NULL if dev is still waiting on a response */ | |
773 | response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; | |
774 | pmsg_hdr = bus_info->pending_msg_hdr; | |
87241ab8 | 775 | goto out_respond; |
0274b5ae | 776 | } |
0aca7844 | 777 | |
2836c6a8 | 778 | if (need_response) { |
0274b5ae DZ |
779 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); |
780 | if (!pmsg_hdr) { | |
368acb3f DK |
781 | POSTCODE_LINUX_4(MALLOC_FAILURE_PC, cmd, |
782 | bus_info->chipset_bus_no, | |
783 | POSTCODE_SEVERITY_ERR); | |
87241ab8 | 784 | return; |
0274b5ae DZ |
785 | } |
786 | ||
787 | memcpy(pmsg_hdr, msg_hdr, | |
98d7b594 | 788 | sizeof(struct controlvm_message_header)); |
0274b5ae | 789 | bus_info->pending_msg_hdr = pmsg_hdr; |
75c1f8b7 | 790 | } |
12e364b9 | 791 | |
12e364b9 KC |
792 | if (response == CONTROLVM_RESP_SUCCESS) { |
793 | switch (cmd) { | |
794 | case CONTROLVM_BUS_CREATE: | |
87241ab8 | 795 | chipset_bus_create(bus_info); |
12e364b9 KC |
796 | break; |
797 | case CONTROLVM_BUS_DESTROY: | |
87241ab8 | 798 | chipset_bus_destroy(bus_info); |
12e364b9 KC |
799 | break; |
800 | } | |
801 | } | |
368acb3f | 802 | |
87241ab8 | 803 | out_respond: |
4a185e54 | 804 | bus_responder(cmd, pmsg_hdr, response); |
12e364b9 KC |
805 | } |
806 | ||
807 | static void | |
a298bc0b | 808 | device_epilog(struct visor_device *dev_info, |
b4b598fd | 809 | struct spar_segment_state state, u32 cmd, |
2836c6a8 | 810 | struct controlvm_message_header *msg_hdr, int response, |
f4c11551 | 811 | bool need_response, bool for_visorbus) |
12e364b9 | 812 | { |
0274b5ae | 813 | struct controlvm_message_header *pmsg_hdr = NULL; |
12e364b9 | 814 | |
0274b5ae | 815 | if (!dev_info) { |
ec17f452 DB |
816 | /* |
817 | * relying on a valid passed in response code | |
818 | * be lazy and re-use msg_hdr for this failure, is this ok?? | |
819 | */ | |
0274b5ae | 820 | pmsg_hdr = msg_hdr; |
87241ab8 | 821 | goto out_respond; |
0274b5ae DZ |
822 | } |
823 | ||
824 | if (dev_info->pending_msg_hdr) { | |
825 | /* only non-NULL if dev is still waiting on a response */ | |
826 | response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; | |
827 | pmsg_hdr = dev_info->pending_msg_hdr; | |
87241ab8 | 828 | goto out_respond; |
0274b5ae DZ |
829 | } |
830 | ||
2836c6a8 | 831 | if (need_response) { |
0274b5ae DZ |
832 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); |
833 | if (!pmsg_hdr) { | |
834 | response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
87241ab8 | 835 | goto out_respond; |
0274b5ae DZ |
836 | } |
837 | ||
838 | memcpy(pmsg_hdr, msg_hdr, | |
98d7b594 | 839 | sizeof(struct controlvm_message_header)); |
0274b5ae | 840 | dev_info->pending_msg_hdr = pmsg_hdr; |
75c1f8b7 | 841 | } |
12e364b9 | 842 | |
12e364b9 KC |
843 | if (response >= 0) { |
844 | switch (cmd) { | |
845 | case CONTROLVM_DEVICE_CREATE: | |
87241ab8 | 846 | chipset_device_create(dev_info); |
12e364b9 KC |
847 | break; |
848 | case CONTROLVM_DEVICE_CHANGESTATE: | |
849 | /* ServerReady / ServerRunning / SegmentStateRunning */ | |
bd0d2dcc BR |
850 | if (state.alive == segment_state_running.alive && |
851 | state.operating == | |
852 | segment_state_running.operating) { | |
87241ab8 | 853 | chipset_device_resume(dev_info); |
12e364b9 KC |
854 | } |
855 | /* ServerNotReady / ServerLost / SegmentStateStandby */ | |
bd0d2dcc | 856 | else if (state.alive == segment_state_standby.alive && |
3f833b54 | 857 | state.operating == |
bd0d2dcc | 858 | segment_state_standby.operating) { |
ec17f452 DB |
859 | /* |
860 | * technically this is standby case | |
12e364b9 KC |
861 | * where server is lost |
862 | */ | |
87241ab8 | 863 | chipset_device_pause(dev_info); |
12e364b9 KC |
864 | } |
865 | break; | |
866 | case CONTROLVM_DEVICE_DESTROY: | |
87241ab8 | 867 | chipset_device_destroy(dev_info); |
12e364b9 KC |
868 | break; |
869 | } | |
870 | } | |
3cb3fa3b | 871 | |
87241ab8 | 872 | out_respond: |
3cb3fa3b | 873 | device_responder(cmd, pmsg_hdr, response); |
12e364b9 KC |
874 | } |
875 | ||
876 | static void | |
3ab47701 | 877 | bus_create(struct controlvm_message *inmsg) |
12e364b9 | 878 | { |
2ea5117b | 879 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 880 | u32 bus_no = cmd->create_bus.bus_no; |
12e364b9 | 881 | int rc = CONTROLVM_RESP_SUCCESS; |
d32517e3 | 882 | struct visor_device *bus_info; |
b32c4997 | 883 | struct visorchannel *visorchannel; |
12e364b9 | 884 | |
d32517e3 | 885 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
6c5fed35 BR |
886 | if (bus_info && (bus_info->state.created == 1)) { |
887 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 888 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 889 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
9fd04060 | 890 | goto out_bus_epilog; |
12e364b9 | 891 | } |
6c5fed35 BR |
892 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
893 | if (!bus_info) { | |
894 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 895 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 896 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
9fd04060 | 897 | goto out_bus_epilog; |
12e364b9 KC |
898 | } |
899 | ||
4abce83d | 900 | INIT_LIST_HEAD(&bus_info->list_all); |
d32517e3 DZ |
901 | bus_info->chipset_bus_no = bus_no; |
902 | bus_info->chipset_dev_no = BUS_ROOT_DEVICE; | |
12e364b9 | 903 | |
6c5fed35 | 904 | POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 905 | |
b32c4997 DZ |
906 | visorchannel = visorchannel_create(cmd->create_bus.channel_addr, |
907 | cmd->create_bus.channel_bytes, | |
908 | GFP_KERNEL, | |
909 | cmd->create_bus.bus_data_type_uuid); | |
910 | ||
911 | if (!visorchannel) { | |
912 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
913 | POSTCODE_SEVERITY_ERR); | |
914 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
915 | kfree(bus_info); | |
916 | bus_info = NULL; | |
9fd04060 | 917 | goto out_bus_epilog; |
b32c4997 DZ |
918 | } |
919 | bus_info->visorchannel = visorchannel; | |
820b11b6 | 920 | if (uuid_le_cmp(cmd->create_bus.bus_inst_uuid, spar_siovm_uuid) == 0) |
12c957dc | 921 | save_crash_message(inmsg, CRASH_BUS); |
12e364b9 | 922 | |
6c5fed35 | 923 | POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 924 | |
9fd04060 | 925 | out_bus_epilog: |
3032aedd | 926 | bus_epilog(bus_info, CONTROLVM_BUS_CREATE, &inmsg->hdr, |
98d7b594 | 927 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
928 | } |
929 | ||
930 | static void | |
3ab47701 | 931 | bus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 932 | { |
2ea5117b | 933 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 934 | u32 bus_no = cmd->destroy_bus.bus_no; |
d32517e3 | 935 | struct visor_device *bus_info; |
12e364b9 KC |
936 | int rc = CONTROLVM_RESP_SUCCESS; |
937 | ||
d32517e3 | 938 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
dff54cd6 | 939 | if (!bus_info) |
22ad57ba | 940 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
dff54cd6 | 941 | else if (bus_info->state.created == 0) |
22ad57ba | 942 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 943 | |
3032aedd | 944 | bus_epilog(bus_info, CONTROLVM_BUS_DESTROY, &inmsg->hdr, |
98d7b594 | 945 | rc, inmsg->hdr.flags.response_expected == 1); |
d32517e3 DZ |
946 | |
947 | /* bus_info is freed as part of the busdevice_release function */ | |
12e364b9 KC |
948 | } |
949 | ||
950 | static void | |
317d9614 BR |
951 | bus_configure(struct controlvm_message *inmsg, |
952 | struct parser_context *parser_ctx) | |
12e364b9 | 953 | { |
2ea5117b | 954 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e | 955 | u32 bus_no; |
d32517e3 | 956 | struct visor_device *bus_info; |
12e364b9 | 957 | int rc = CONTROLVM_RESP_SUCCESS; |
12e364b9 | 958 | |
654bada0 BR |
959 | bus_no = cmd->configure_bus.bus_no; |
960 | POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no, | |
961 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 962 | |
d32517e3 | 963 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
654bada0 BR |
964 | if (!bus_info) { |
965 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 966 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 967 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
968 | } else if (bus_info->state.created == 0) { |
969 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 970 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 971 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
e4a3dd33 | 972 | } else if (bus_info->pending_msg_hdr) { |
654bada0 | 973 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, |
12e364b9 | 974 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 975 | rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; |
654bada0 | 976 | } else { |
a07d7c38 TS |
977 | visorchannel_set_clientpartition |
978 | (bus_info->visorchannel, | |
979 | cmd->configure_bus.guest_handle); | |
654bada0 BR |
980 | bus_info->partition_uuid = parser_id_get(parser_ctx); |
981 | parser_param_start(parser_ctx, PARSERSTRING_NAME); | |
982 | bus_info->name = parser_string_get(parser_ctx); | |
983 | ||
654bada0 BR |
984 | POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no, |
985 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 986 | } |
3032aedd | 987 | bus_epilog(bus_info, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, |
98d7b594 | 988 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
989 | } |
990 | ||
991 | static void | |
3ab47701 | 992 | my_device_create(struct controlvm_message *inmsg) |
12e364b9 | 993 | { |
2ea5117b | 994 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
995 | u32 bus_no = cmd->create_device.bus_no; |
996 | u32 dev_no = cmd->create_device.dev_no; | |
a298bc0b | 997 | struct visor_device *dev_info = NULL; |
d32517e3 | 998 | struct visor_device *bus_info; |
b32c4997 | 999 | struct visorchannel *visorchannel; |
12e364b9 KC |
1000 | int rc = CONTROLVM_RESP_SUCCESS; |
1001 | ||
a298bc0b DZ |
1002 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
1003 | if (!bus_info) { | |
c60c8e26 | 1004 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1005 | POSTCODE_SEVERITY_ERR); |
a298bc0b | 1006 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c6af7a9c | 1007 | goto out_respond; |
12e364b9 | 1008 | } |
a298bc0b DZ |
1009 | |
1010 | if (bus_info->state.created == 0) { | |
c60c8e26 | 1011 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1012 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1013 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c6af7a9c | 1014 | goto out_respond; |
12e364b9 | 1015 | } |
a298bc0b DZ |
1016 | |
1017 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); | |
1018 | if (dev_info && (dev_info->state.created == 1)) { | |
c60c8e26 | 1019 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1020 | POSTCODE_SEVERITY_ERR); |
a298bc0b | 1021 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
c6af7a9c | 1022 | goto out_respond; |
12e364b9 | 1023 | } |
a298bc0b | 1024 | |
c60c8e26 BR |
1025 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
1026 | if (!dev_info) { | |
1027 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1028 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1029 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
c6af7a9c | 1030 | goto out_respond; |
12e364b9 | 1031 | } |
97a84f12 | 1032 | |
a298bc0b DZ |
1033 | dev_info->chipset_bus_no = bus_no; |
1034 | dev_info->chipset_dev_no = dev_no; | |
1035 | dev_info->inst = cmd->create_device.dev_inst_uuid; | |
1036 | ||
1037 | /* not sure where the best place to set the 'parent' */ | |
1038 | dev_info->device.parent = &bus_info->device; | |
1039 | ||
c60c8e26 | 1040 | POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, |
12e364b9 KC |
1041 | POSTCODE_SEVERITY_INFO); |
1042 | ||
a3ef1a8e DK |
1043 | visorchannel = |
1044 | visorchannel_create_with_lock(cmd->create_device.channel_addr, | |
1045 | cmd->create_device.channel_bytes, | |
1046 | GFP_KERNEL, | |
1047 | cmd->create_device.data_type_uuid); | |
b32c4997 DZ |
1048 | |
1049 | if (!visorchannel) { | |
1050 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
1051 | POSTCODE_SEVERITY_ERR); | |
1052 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1053 | kfree(dev_info); | |
1054 | dev_info = NULL; | |
c6af7a9c | 1055 | goto out_respond; |
b32c4997 DZ |
1056 | } |
1057 | dev_info->visorchannel = visorchannel; | |
1058 | dev_info->channel_type_guid = cmd->create_device.data_type_uuid; | |
12c957dc TS |
1059 | if (uuid_le_cmp(cmd->create_device.data_type_uuid, |
1060 | spar_vhba_channel_protocol_uuid) == 0) | |
1061 | save_crash_message(inmsg, CRASH_DEV); | |
1062 | ||
c60c8e26 | 1063 | POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no, |
12e364b9 | 1064 | POSTCODE_SEVERITY_INFO); |
c6af7a9c | 1065 | out_respond: |
b4b598fd | 1066 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1067 | CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, |
4da3336c | 1068 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1069 | } |
1070 | ||
1071 | static void | |
3ab47701 | 1072 | my_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 1073 | { |
2ea5117b | 1074 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1075 | u32 bus_no = cmd->device_change_state.bus_no; |
1076 | u32 dev_no = cmd->device_change_state.dev_no; | |
2ea5117b | 1077 | struct spar_segment_state state = cmd->device_change_state.state; |
a298bc0b | 1078 | struct visor_device *dev_info; |
12e364b9 KC |
1079 | int rc = CONTROLVM_RESP_SUCCESS; |
1080 | ||
a298bc0b | 1081 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
0278a905 BR |
1082 | if (!dev_info) { |
1083 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1084 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1085 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
0278a905 BR |
1086 | } else if (dev_info->state.created == 0) { |
1087 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1088 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1089 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
12e364b9 | 1090 | } |
0278a905 | 1091 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1092 | device_epilog(dev_info, state, |
0278a905 | 1093 | CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, |
4da3336c | 1094 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1095 | } |
1096 | ||
1097 | static void | |
3ab47701 | 1098 | my_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1099 | { |
2ea5117b | 1100 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1101 | u32 bus_no = cmd->destroy_device.bus_no; |
1102 | u32 dev_no = cmd->destroy_device.dev_no; | |
a298bc0b | 1103 | struct visor_device *dev_info; |
12e364b9 KC |
1104 | int rc = CONTROLVM_RESP_SUCCESS; |
1105 | ||
a298bc0b | 1106 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
61715c8b | 1107 | if (!dev_info) |
22ad57ba | 1108 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
61715c8b | 1109 | else if (dev_info->state.created == 0) |
22ad57ba | 1110 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1111 | |
61715c8b | 1112 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1113 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1114 | CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, |
4da3336c | 1115 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1116 | } |
1117 | ||
ec17f452 DB |
1118 | /** |
1119 | * initialize_controlvm_payload_info() - init controlvm_payload_info struct | |
1120 | * @phys_addr: the physical address of controlvm channel | |
1121 | * @offset: the offset to payload | |
1122 | * @bytes: the size of the payload in bytes | |
1123 | * @info: the returning valid struct | |
1124 | * | |
1125 | * When provided with the physical address of the controlvm channel | |
12e364b9 KC |
1126 | * (phys_addr), the offset to the payload area we need to manage |
1127 | * (offset), and the size of this payload area (bytes), fills in the | |
ec17f452 DB |
1128 | * controlvm_payload_info struct. |
1129 | * | |
1130 | * Return: CONTROLVM_RESP_SUCCESS for success or a negative for failure | |
12e364b9 KC |
1131 | */ |
1132 | static int | |
d5b3f1dc | 1133 | initialize_controlvm_payload_info(u64 phys_addr, u64 offset, u32 bytes, |
c1f834eb | 1134 | struct visor_controlvm_payload_info *info) |
12e364b9 | 1135 | { |
3103dc03 | 1136 | u8 *payload = NULL; |
12e364b9 | 1137 | |
dde29996 DK |
1138 | if (!info) |
1139 | return -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; | |
1140 | ||
c1f834eb | 1141 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
dde29996 DK |
1142 | if ((offset == 0) || (bytes == 0)) |
1143 | return -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; | |
1144 | ||
3103dc03 | 1145 | payload = memremap(phys_addr + offset, bytes, MEMREMAP_WB); |
dde29996 DK |
1146 | if (!payload) |
1147 | return -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; | |
12e364b9 KC |
1148 | |
1149 | info->offset = offset; | |
1150 | info->bytes = bytes; | |
1151 | info->ptr = payload; | |
12e364b9 | 1152 | |
dde29996 | 1153 | return CONTROLVM_RESP_SUCCESS; |
12e364b9 KC |
1154 | } |
1155 | ||
1156 | static void | |
c1f834eb | 1157 | destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info) |
12e364b9 | 1158 | { |
597c338f | 1159 | if (info->ptr) { |
3103dc03 | 1160 | memunmap(info->ptr); |
12e364b9 KC |
1161 | info->ptr = NULL; |
1162 | } | |
c1f834eb | 1163 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 KC |
1164 | } |
1165 | ||
1166 | static void | |
1167 | initialize_controlvm_payload(void) | |
1168 | { | |
d5b3f1dc | 1169 | u64 phys_addr = visorchannel_get_physaddr(controlvm_channel); |
cafefc0c BR |
1170 | u64 payload_offset = 0; |
1171 | u32 payload_bytes = 0; | |
26eb2c0c | 1172 | |
c3d9a224 | 1173 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1174 | offsetof(struct spar_controlvm_channel_protocol, |
1175 | request_payload_offset), | |
cafefc0c | 1176 | &payload_offset, sizeof(payload_offset)) < 0) { |
12e364b9 KC |
1177 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1178 | POSTCODE_SEVERITY_ERR); | |
1179 | return; | |
1180 | } | |
c3d9a224 | 1181 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1182 | offsetof(struct spar_controlvm_channel_protocol, |
1183 | request_payload_bytes), | |
cafefc0c | 1184 | &payload_bytes, sizeof(payload_bytes)) < 0) { |
12e364b9 KC |
1185 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1186 | POSTCODE_SEVERITY_ERR); | |
1187 | return; | |
1188 | } | |
1189 | initialize_controlvm_payload_info(phys_addr, | |
cafefc0c | 1190 | payload_offset, payload_bytes, |
84982fbf | 1191 | &controlvm_payload_info); |
12e364b9 KC |
1192 | } |
1193 | ||
ec17f452 DB |
1194 | /** |
1195 | * visorchipset_chipset_ready() - sends chipset_ready action | |
1196 | * | |
1197 | * Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1198 | * | |
1199 | * Return: CONTROLVM_RESP_SUCCESS | |
12e364b9 | 1200 | */ |
d3368a58 | 1201 | static int |
12e364b9 KC |
1202 | visorchipset_chipset_ready(void) |
1203 | { | |
eb34e877 | 1204 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); |
12e364b9 KC |
1205 | return CONTROLVM_RESP_SUCCESS; |
1206 | } | |
12e364b9 | 1207 | |
d3368a58 | 1208 | static int |
12e364b9 KC |
1209 | visorchipset_chipset_selftest(void) |
1210 | { | |
1211 | char env_selftest[20]; | |
1212 | char *envp[] = { env_selftest, NULL }; | |
26eb2c0c | 1213 | |
12e364b9 | 1214 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); |
eb34e877 | 1215 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1216 | envp); |
1217 | return CONTROLVM_RESP_SUCCESS; | |
1218 | } | |
12e364b9 | 1219 | |
ec17f452 DB |
1220 | /** |
1221 | * visorchipset_chipset_notready() - sends chipset_notready action | |
1222 | * | |
1223 | * Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1224 | * | |
1225 | * Return: CONTROLVM_RESP_SUCCESS | |
12e364b9 | 1226 | */ |
d3368a58 | 1227 | static int |
12e364b9 KC |
1228 | visorchipset_chipset_notready(void) |
1229 | { | |
eb34e877 | 1230 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); |
12e364b9 KC |
1231 | return CONTROLVM_RESP_SUCCESS; |
1232 | } | |
12e364b9 KC |
1233 | |
1234 | static void | |
77a0449d | 1235 | chipset_ready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1236 | { |
1237 | int rc = visorchipset_chipset_ready(); | |
26eb2c0c | 1238 | |
12e364b9 KC |
1239 | if (rc != CONTROLVM_RESP_SUCCESS) |
1240 | rc = -rc; | |
260d8992 | 1241 | if (msg_hdr->flags.response_expected) |
77a0449d | 1242 | controlvm_respond(msg_hdr, rc); |
12e364b9 KC |
1243 | } |
1244 | ||
1245 | static void | |
77a0449d | 1246 | chipset_selftest(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1247 | { |
1248 | int rc = visorchipset_chipset_selftest(); | |
26eb2c0c | 1249 | |
12e364b9 KC |
1250 | if (rc != CONTROLVM_RESP_SUCCESS) |
1251 | rc = -rc; | |
77a0449d BR |
1252 | if (msg_hdr->flags.response_expected) |
1253 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1254 | } |
1255 | ||
1256 | static void | |
77a0449d | 1257 | chipset_notready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1258 | { |
1259 | int rc = visorchipset_chipset_notready(); | |
26eb2c0c | 1260 | |
12e364b9 KC |
1261 | if (rc != CONTROLVM_RESP_SUCCESS) |
1262 | rc = -rc; | |
77a0449d BR |
1263 | if (msg_hdr->flags.response_expected) |
1264 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1265 | } |
1266 | ||
12e364b9 | 1267 | /* |
ec17f452 | 1268 | * The general parahotplug flow works as follows. The visorchipset |
12e364b9 | 1269 | * driver receives a DEVICE_CHANGESTATE message from Command |
ec17f452 | 1270 | * specifying a physical device to enable or disable. The CONTROLVM |
12e364b9 KC |
1271 | * message handler calls parahotplug_process_message, which then adds |
1272 | * the message to a global list and kicks off a udev event which | |
1273 | * causes a user level script to enable or disable the specified | |
ec17f452 | 1274 | * device. The udev script then writes to |
12e364b9 KC |
1275 | * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write |
1276 | * to get called, at which point the appropriate CONTROLVM message is | |
1277 | * retrieved from the list and responded to. | |
1278 | */ | |
1279 | ||
1280 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
1281 | ||
ec17f452 DB |
1282 | /** |
1283 | * parahotplug_next_id() - generate unique int to match an outstanding CONTROLVM | |
1284 | * message with a udev script /proc response | |
1285 | * | |
1286 | * Return: a unique integer value | |
12e364b9 KC |
1287 | */ |
1288 | static int | |
1289 | parahotplug_next_id(void) | |
1290 | { | |
1291 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 1292 | |
12e364b9 KC |
1293 | return atomic_inc_return(&id); |
1294 | } | |
1295 | ||
ec17f452 DB |
1296 | /** |
1297 | * parahotplug_next_expiration() - returns the time (in jiffies) when a | |
1298 | * CONTROLVM message on the list should expire | |
1299 | * -- PARAHOTPLUG_TIMEOUT_MS in the future | |
1300 | * | |
1301 | * Return: expected expiration time (in jiffies) | |
12e364b9 KC |
1302 | */ |
1303 | static unsigned long | |
1304 | parahotplug_next_expiration(void) | |
1305 | { | |
2cc1a1b3 | 1306 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
1307 | } |
1308 | ||
ec17f452 DB |
1309 | /** |
1310 | * parahotplug_request_create() - create a parahotplug_request, which is | |
1311 | * basically a wrapper for a CONTROLVM_MESSAGE | |
1312 | * that we can stick on a list | |
1313 | * @msg: the message to insert in the request | |
1314 | * | |
1315 | * Return: the request containing the provided message | |
12e364b9 KC |
1316 | */ |
1317 | static struct parahotplug_request * | |
3ab47701 | 1318 | parahotplug_request_create(struct controlvm_message *msg) |
12e364b9 | 1319 | { |
ea0dcfcf QL |
1320 | struct parahotplug_request *req; |
1321 | ||
6a55e3c3 | 1322 | req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY); |
38f736e9 | 1323 | if (!req) |
12e364b9 KC |
1324 | return NULL; |
1325 | ||
1326 | req->id = parahotplug_next_id(); | |
1327 | req->expiration = parahotplug_next_expiration(); | |
1328 | req->msg = *msg; | |
1329 | ||
1330 | return req; | |
1331 | } | |
1332 | ||
ec17f452 DB |
1333 | /** |
1334 | * parahotplug_request_destroy() - free a parahotplug_request | |
1335 | * @req: the request to deallocate | |
12e364b9 KC |
1336 | */ |
1337 | static void | |
1338 | parahotplug_request_destroy(struct parahotplug_request *req) | |
1339 | { | |
1340 | kfree(req); | |
1341 | } | |
1342 | ||
ec17f452 DB |
1343 | /** |
1344 | * parahotplug_request_kickoff() - initiate parahotplug request | |
1345 | * @req: the request to initiate | |
1346 | * | |
1347 | * Cause uevent to run the user level script to do the disable/enable specified | |
1348 | * in the parahotplug_request. | |
12e364b9 KC |
1349 | */ |
1350 | static void | |
1351 | parahotplug_request_kickoff(struct parahotplug_request *req) | |
1352 | { | |
2ea5117b | 1353 | struct controlvm_message_packet *cmd = &req->msg.cmd; |
12e364b9 KC |
1354 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], |
1355 | env_func[40]; | |
1356 | char *envp[] = { | |
1357 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1358 | }; | |
1359 | ||
1360 | sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); | |
1361 | sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); | |
1362 | sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", | |
2ea5117b | 1363 | cmd->device_change_state.state.active); |
12e364b9 | 1364 | sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", |
2ea5117b | 1365 | cmd->device_change_state.bus_no); |
12e364b9 | 1366 | sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", |
2ea5117b | 1367 | cmd->device_change_state.dev_no >> 3); |
12e364b9 | 1368 | sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", |
2ea5117b | 1369 | cmd->device_change_state.dev_no & 0x7); |
12e364b9 | 1370 | |
eb34e877 | 1371 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1372 | envp); |
1373 | } | |
1374 | ||
ec17f452 DB |
1375 | /** |
1376 | * parahotplug_request_complete() - mark request as complete | |
1377 | * @id: the id of the request | |
1378 | * @active: indicates whether the request is assigned to active partition | |
1379 | * | |
12e364b9 | 1380 | * Called from the /proc handler, which means the user script has |
ec17f452 | 1381 | * finished the enable/disable. Find the matching identifier, and |
12e364b9 | 1382 | * respond to the CONTROLVM message with success. |
ec17f452 DB |
1383 | * |
1384 | * Return: 0 on success or -EINVAL on failure | |
12e364b9 KC |
1385 | */ |
1386 | static int | |
b06bdf7d | 1387 | parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1388 | { |
e82ba62e JS |
1389 | struct list_head *pos; |
1390 | struct list_head *tmp; | |
12e364b9 | 1391 | |
ddf5de53 | 1392 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1393 | |
1394 | /* Look for a request matching "id". */ | |
ddf5de53 | 1395 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1396 | struct parahotplug_request *req = |
1397 | list_entry(pos, struct parahotplug_request, list); | |
1398 | if (req->id == id) { | |
ec17f452 DB |
1399 | /* |
1400 | * Found a match. Remove it from the list and | |
12e364b9 KC |
1401 | * respond. |
1402 | */ | |
1403 | list_del(pos); | |
ddf5de53 | 1404 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1405 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1406 | if (req->msg.hdr.flags.response_expected) |
12e364b9 KC |
1407 | controlvm_respond_physdev_changestate( |
1408 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
2ea5117b | 1409 | req->msg.cmd.device_change_state.state); |
12e364b9 KC |
1410 | parahotplug_request_destroy(req); |
1411 | return 0; | |
1412 | } | |
1413 | } | |
1414 | ||
ddf5de53 | 1415 | spin_unlock(¶hotplug_request_list_lock); |
119296ea | 1416 | return -EINVAL; |
12e364b9 KC |
1417 | } |
1418 | ||
ec17f452 DB |
1419 | /** |
1420 | * parahotplug_process_message() - enables or disables a PCI device by kicking | |
1421 | * off a udev script | |
1422 | * @inmsg: the message indicating whether to enable or disable | |
12e364b9 | 1423 | */ |
bd5b9b32 | 1424 | static void |
3ab47701 | 1425 | parahotplug_process_message(struct controlvm_message *inmsg) |
12e364b9 KC |
1426 | { |
1427 | struct parahotplug_request *req; | |
1428 | ||
1429 | req = parahotplug_request_create(inmsg); | |
1430 | ||
38f736e9 | 1431 | if (!req) |
12e364b9 | 1432 | return; |
12e364b9 | 1433 | |
2ea5117b | 1434 | if (inmsg->cmd.device_change_state.state.active) { |
ec17f452 DB |
1435 | /* |
1436 | * For enable messages, just respond with success | |
1437 | * right away. This is a bit of a hack, but there are | |
1438 | * issues with the early enable messages we get (with | |
1439 | * either the udev script not detecting that the device | |
1440 | * is up, or not getting called at all). Fortunately | |
1441 | * the messages that get lost don't matter anyway, as | |
1442 | * | |
1443 | * devices are automatically enabled at | |
1444 | * initialization. | |
12e364b9 KC |
1445 | */ |
1446 | parahotplug_request_kickoff(req); | |
a07d7c38 TS |
1447 | controlvm_respond_physdev_changestate |
1448 | (&inmsg->hdr, | |
1449 | CONTROLVM_RESP_SUCCESS, | |
1450 | inmsg->cmd.device_change_state.state); | |
12e364b9 KC |
1451 | parahotplug_request_destroy(req); |
1452 | } else { | |
ec17f452 DB |
1453 | /* |
1454 | * For disable messages, add the request to the | |
1455 | * request list before kicking off the udev script. It | |
1456 | * won't get responded to until the script has | |
1457 | * indicated it's done. | |
1458 | */ | |
ddf5de53 BR |
1459 | spin_lock(¶hotplug_request_list_lock); |
1460 | list_add_tail(&req->list, ¶hotplug_request_list); | |
1461 | spin_unlock(¶hotplug_request_list_lock); | |
12e364b9 KC |
1462 | |
1463 | parahotplug_request_kickoff(req); | |
1464 | } | |
1465 | } | |
1466 | ||
5f3a7e36 DK |
1467 | static inline unsigned int |
1468 | issue_vmcall_io_controlvm_addr(u64 *control_addr, u32 *control_bytes) | |
1469 | { | |
1470 | struct vmcall_io_controlvm_addr_params params; | |
1471 | int result = VMCALL_SUCCESS; | |
1472 | u64 physaddr; | |
1473 | ||
1474 | physaddr = virt_to_phys(¶ms); | |
1475 | ISSUE_IO_VMCALL(VMCALL_IO_CONTROLVM_ADDR, physaddr, result); | |
1476 | if (VMCALL_SUCCESSFUL(result)) { | |
1477 | *control_addr = params.address; | |
1478 | *control_bytes = params.channel_bytes; | |
1479 | } | |
1480 | return result; | |
1481 | } | |
1482 | ||
d5b3f1dc | 1483 | static u64 controlvm_get_channel_address(void) |
524b0b63 | 1484 | { |
5fc0229a | 1485 | u64 addr = 0; |
b3c55b13 | 1486 | u32 size = 0; |
524b0b63 | 1487 | |
0aca7844 | 1488 | if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) |
524b0b63 | 1489 | return 0; |
0aca7844 | 1490 | |
524b0b63 BR |
1491 | return addr; |
1492 | } | |
1493 | ||
12e364b9 KC |
1494 | static void |
1495 | setup_crash_devices_work_queue(struct work_struct *work) | |
1496 | { | |
e6bdb904 BR |
1497 | struct controlvm_message local_crash_bus_msg; |
1498 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 1499 | struct controlvm_message msg; |
e6bdb904 BR |
1500 | u32 local_crash_msg_offset; |
1501 | u16 local_crash_msg_count; | |
12e364b9 | 1502 | |
12e364b9 KC |
1503 | POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); |
1504 | ||
1505 | /* send init chipset msg */ | |
98d7b594 | 1506 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
1507 | msg.cmd.init_chipset.bus_count = 23; |
1508 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
1509 | |
1510 | chipset_init(&msg); | |
1511 | ||
12e364b9 | 1512 | /* get saved message count */ |
c3d9a224 | 1513 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1514 | offsetof(struct spar_controlvm_channel_protocol, |
1515 | saved_crash_message_count), | |
e6bdb904 | 1516 | &local_crash_msg_count, sizeof(u16)) < 0) { |
12e364b9 KC |
1517 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
1518 | POSTCODE_SEVERITY_ERR); | |
1519 | return; | |
1520 | } | |
1521 | ||
e6bdb904 | 1522 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
12e364b9 | 1523 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
e6bdb904 | 1524 | local_crash_msg_count, |
12e364b9 KC |
1525 | POSTCODE_SEVERITY_ERR); |
1526 | return; | |
1527 | } | |
1528 | ||
1529 | /* get saved crash message offset */ | |
c3d9a224 | 1530 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1531 | offsetof(struct spar_controlvm_channel_protocol, |
1532 | saved_crash_message_offset), | |
e6bdb904 | 1533 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
12e364b9 KC |
1534 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
1535 | POSTCODE_SEVERITY_ERR); | |
1536 | return; | |
1537 | } | |
1538 | ||
1539 | /* read create device message for storage bus offset */ | |
c3d9a224 | 1540 | if (visorchannel_read(controlvm_channel, |
e6bdb904 BR |
1541 | local_crash_msg_offset, |
1542 | &local_crash_bus_msg, | |
3ab47701 | 1543 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
1544 | POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, |
1545 | POSTCODE_SEVERITY_ERR); | |
1546 | return; | |
1547 | } | |
1548 | ||
1549 | /* read create device message for storage device */ | |
c3d9a224 | 1550 | if (visorchannel_read(controlvm_channel, |
e6bdb904 | 1551 | local_crash_msg_offset + |
3ab47701 | 1552 | sizeof(struct controlvm_message), |
e6bdb904 | 1553 | &local_crash_dev_msg, |
3ab47701 | 1554 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
1555 | POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, |
1556 | POSTCODE_SEVERITY_ERR); | |
1557 | return; | |
1558 | } | |
1559 | ||
1560 | /* reuse IOVM create bus message */ | |
ebec8967 | 1561 | if (local_crash_bus_msg.cmd.create_bus.channel_addr) { |
e6bdb904 | 1562 | bus_create(&local_crash_bus_msg); |
75c1f8b7 | 1563 | } else { |
12e364b9 KC |
1564 | POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, |
1565 | POSTCODE_SEVERITY_ERR); | |
1566 | return; | |
1567 | } | |
1568 | ||
1569 | /* reuse create device message for storage device */ | |
ebec8967 | 1570 | if (local_crash_dev_msg.cmd.create_device.channel_addr) { |
e6bdb904 | 1571 | my_device_create(&local_crash_dev_msg); |
75c1f8b7 | 1572 | } else { |
12e364b9 KC |
1573 | POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, |
1574 | POSTCODE_SEVERITY_ERR); | |
1575 | return; | |
1576 | } | |
12e364b9 | 1577 | POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); |
12e364b9 KC |
1578 | } |
1579 | ||
87241ab8 | 1580 | void |
d32517e3 | 1581 | bus_create_response(struct visor_device *bus_info, int response) |
12e364b9 | 1582 | { |
4b4fd43a | 1583 | if (response >= 0) |
0274b5ae | 1584 | bus_info->state.created = 1; |
0274b5ae DZ |
1585 | |
1586 | bus_responder(CONTROLVM_BUS_CREATE, bus_info->pending_msg_hdr, | |
1587 | response); | |
1588 | ||
1589 | kfree(bus_info->pending_msg_hdr); | |
1590 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1591 | } |
1592 | ||
87241ab8 | 1593 | void |
d32517e3 | 1594 | bus_destroy_response(struct visor_device *bus_info, int response) |
12e364b9 | 1595 | { |
0274b5ae DZ |
1596 | bus_responder(CONTROLVM_BUS_DESTROY, bus_info->pending_msg_hdr, |
1597 | response); | |
1598 | ||
1599 | kfree(bus_info->pending_msg_hdr); | |
1600 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1601 | } |
1602 | ||
87241ab8 | 1603 | void |
a298bc0b | 1604 | device_create_response(struct visor_device *dev_info, int response) |
12e364b9 | 1605 | { |
0274b5ae DZ |
1606 | if (response >= 0) |
1607 | dev_info->state.created = 1; | |
1608 | ||
1609 | device_responder(CONTROLVM_DEVICE_CREATE, dev_info->pending_msg_hdr, | |
1610 | response); | |
1611 | ||
1612 | kfree(dev_info->pending_msg_hdr); | |
addce19f | 1613 | dev_info->pending_msg_hdr = NULL; |
12e364b9 KC |
1614 | } |
1615 | ||
87241ab8 | 1616 | void |
a298bc0b | 1617 | device_destroy_response(struct visor_device *dev_info, int response) |
12e364b9 | 1618 | { |
0274b5ae DZ |
1619 | device_responder(CONTROLVM_DEVICE_DESTROY, dev_info->pending_msg_hdr, |
1620 | response); | |
1621 | ||
1622 | kfree(dev_info->pending_msg_hdr); | |
1623 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1624 | } |
1625 | ||
87241ab8 | 1626 | void |
ea3a5aaf DB |
1627 | device_pause_response(struct visor_device *dev_info, |
1628 | int response) | |
12e364b9 | 1629 | { |
12e364b9 | 1630 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
b4b598fd | 1631 | dev_info, response, |
bd0d2dcc | 1632 | segment_state_standby); |
0274b5ae DZ |
1633 | |
1634 | kfree(dev_info->pending_msg_hdr); | |
1635 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 | 1636 | } |
12e364b9 | 1637 | |
87241ab8 | 1638 | void |
a298bc0b | 1639 | device_resume_response(struct visor_device *dev_info, int response) |
12e364b9 KC |
1640 | { |
1641 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
b4b598fd | 1642 | dev_info, response, |
bd0d2dcc | 1643 | segment_state_running); |
0274b5ae DZ |
1644 | |
1645 | kfree(dev_info->pending_msg_hdr); | |
1646 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1647 | } |
1648 | ||
ec17f452 DB |
1649 | /** |
1650 | * devicedisabled_store() - disables the hotplug device | |
1651 | * @dev: sysfs interface variable not utilized in this function | |
1652 | * @attr: sysfs interface variable not utilized in this function | |
1653 | * @buf: buffer containing the device id | |
1654 | * @count: the size of the buffer | |
1655 | * | |
1656 | * The parahotplug/devicedisabled interface gets called by our support script | |
e56fa7cd BR |
1657 | * when an SR-IOV device has been shut down. The ID is passed to the script |
1658 | * and then passed back when the device has been removed. | |
ec17f452 DB |
1659 | * |
1660 | * Return: the size of the buffer for success or negative for error | |
e56fa7cd BR |
1661 | */ |
1662 | static ssize_t devicedisabled_store(struct device *dev, | |
8e76e695 BR |
1663 | struct device_attribute *attr, |
1664 | const char *buf, size_t count) | |
e56fa7cd | 1665 | { |
94217363 | 1666 | unsigned int id; |
80224f06 | 1667 | int err; |
e56fa7cd | 1668 | |
ebec8967 | 1669 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
1670 | return -EINVAL; |
1671 | ||
80224f06 EA |
1672 | err = parahotplug_request_complete(id, 0); |
1673 | if (err < 0) | |
1674 | return err; | |
e56fa7cd BR |
1675 | return count; |
1676 | } | |
1677 | ||
ec17f452 DB |
1678 | /** |
1679 | * deviceenabled_store() - enables the hotplug device | |
1680 | * @dev: sysfs interface variable not utilized in this function | |
1681 | * @attr: sysfs interface variable not utilized in this function | |
1682 | * @buf: buffer containing the device id | |
1683 | * @count: the size of the buffer | |
1684 | * | |
1685 | * The parahotplug/deviceenabled interface gets called by our support script | |
e56fa7cd BR |
1686 | * when an SR-IOV device has been recovered. The ID is passed to the script |
1687 | * and then passed back when the device has been brought back up. | |
ec17f452 DB |
1688 | * |
1689 | * Return: the size of the buffer for success or negative for error | |
e56fa7cd BR |
1690 | */ |
1691 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
1692 | struct device_attribute *attr, |
1693 | const char *buf, size_t count) | |
e56fa7cd | 1694 | { |
94217363 | 1695 | unsigned int id; |
e56fa7cd | 1696 | |
ebec8967 | 1697 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
1698 | return -EINVAL; |
1699 | ||
1700 | parahotplug_request_complete(id, 1); | |
1701 | return count; | |
1702 | } | |
1703 | ||
e3420ed6 EA |
1704 | static int |
1705 | visorchipset_mmap(struct file *file, struct vm_area_struct *vma) | |
1706 | { | |
1707 | unsigned long physaddr = 0; | |
1708 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
780fcad3 | 1709 | u64 addr = 0; |
e3420ed6 EA |
1710 | |
1711 | /* sv_enable_dfp(); */ | |
1712 | if (offset & (PAGE_SIZE - 1)) | |
1713 | return -ENXIO; /* need aligned offsets */ | |
1714 | ||
1715 | switch (offset) { | |
1716 | case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: | |
1717 | vma->vm_flags |= VM_IO; | |
1718 | if (!*file_controlvm_channel) | |
1719 | return -ENXIO; | |
1720 | ||
a07d7c38 TS |
1721 | visorchannel_read |
1722 | (*file_controlvm_channel, | |
1723 | offsetof(struct spar_controlvm_channel_protocol, | |
1724 | gp_control_channel), | |
1725 | &addr, sizeof(addr)); | |
e3420ed6 EA |
1726 | if (!addr) |
1727 | return -ENXIO; | |
1728 | ||
1729 | physaddr = (unsigned long)addr; | |
1730 | if (remap_pfn_range(vma, vma->vm_start, | |
1731 | physaddr >> PAGE_SHIFT, | |
1732 | vma->vm_end - vma->vm_start, | |
1733 | /*pgprot_noncached */ | |
1734 | (vma->vm_page_prot))) { | |
1735 | return -EAGAIN; | |
1736 | } | |
1737 | break; | |
1738 | default: | |
1739 | return -ENXIO; | |
1740 | } | |
1741 | return 0; | |
1742 | } | |
1743 | ||
5f3a7e36 DK |
1744 | static inline s64 issue_vmcall_query_guest_virtual_time_offset(void) |
1745 | { | |
1746 | u64 result = VMCALL_SUCCESS; | |
1747 | u64 physaddr = 0; | |
1748 | ||
1749 | ISSUE_IO_VMCALL(VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET, physaddr, | |
1750 | result); | |
1751 | return result; | |
1752 | } | |
1753 | ||
1754 | static inline int issue_vmcall_update_physical_time(u64 adjustment) | |
1755 | { | |
1756 | int result = VMCALL_SUCCESS; | |
1757 | ||
1758 | ISSUE_IO_VMCALL(VMCALL_UPDATE_PHYSICAL_TIME, adjustment, result); | |
1759 | return result; | |
1760 | } | |
1761 | ||
e3420ed6 EA |
1762 | static long visorchipset_ioctl(struct file *file, unsigned int cmd, |
1763 | unsigned long arg) | |
1764 | { | |
2500276e | 1765 | u64 adjustment; |
e3420ed6 EA |
1766 | s64 vrtc_offset; |
1767 | ||
1768 | switch (cmd) { | |
1769 | case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: | |
1770 | /* get the physical rtc offset */ | |
1771 | vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); | |
1772 | if (copy_to_user((void __user *)arg, &vrtc_offset, | |
1773 | sizeof(vrtc_offset))) { | |
1774 | return -EFAULT; | |
1775 | } | |
d5b3f1dc | 1776 | return 0; |
e3420ed6 EA |
1777 | case VMCALL_UPDATE_PHYSICAL_TIME: |
1778 | if (copy_from_user(&adjustment, (void __user *)arg, | |
1779 | sizeof(adjustment))) { | |
1780 | return -EFAULT; | |
1781 | } | |
1782 | return issue_vmcall_update_physical_time(adjustment); | |
1783 | default: | |
1784 | return -EFAULT; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | static const struct file_operations visorchipset_fops = { | |
1789 | .owner = THIS_MODULE, | |
1790 | .open = visorchipset_open, | |
1791 | .read = NULL, | |
1792 | .write = NULL, | |
1793 | .unlocked_ioctl = visorchipset_ioctl, | |
1794 | .release = visorchipset_release, | |
1795 | .mmap = visorchipset_mmap, | |
1796 | }; | |
1797 | ||
0f570fc0 | 1798 | static int |
e3420ed6 EA |
1799 | visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) |
1800 | { | |
1801 | int rc = 0; | |
1802 | ||
1803 | file_controlvm_channel = controlvm_channel; | |
1804 | cdev_init(&file_cdev, &visorchipset_fops); | |
1805 | file_cdev.owner = THIS_MODULE; | |
1806 | if (MAJOR(major_dev) == 0) { | |
46168810 | 1807 | rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset"); |
e3420ed6 EA |
1808 | /* dynamic major device number registration required */ |
1809 | if (rc < 0) | |
1810 | return rc; | |
1811 | } else { | |
1812 | /* static major device number registration required */ | |
46168810 | 1813 | rc = register_chrdev_region(major_dev, 1, "visorchipset"); |
e3420ed6 EA |
1814 | if (rc < 0) |
1815 | return rc; | |
1816 | } | |
1817 | rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); | |
1818 | if (rc < 0) { | |
1819 | unregister_chrdev_region(major_dev, 1); | |
1820 | return rc; | |
1821 | } | |
1822 | return 0; | |
1823 | } | |
1824 | ||
1366a3db DK |
1825 | static void |
1826 | visorchipset_file_cleanup(dev_t major_dev) | |
1827 | { | |
1828 | if (file_cdev.ops) | |
1829 | cdev_del(&file_cdev); | |
1830 | file_cdev.ops = NULL; | |
1831 | unregister_chrdev_region(major_dev, 1); | |
1832 | } | |
1833 | ||
612b81c9 DK |
1834 | static struct parser_context * |
1835 | parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry) | |
1836 | { | |
1837 | int allocbytes = sizeof(struct parser_context) + bytes; | |
1838 | struct parser_context *ctx; | |
1839 | ||
1840 | if (retry) | |
1841 | *retry = false; | |
1842 | ||
1843 | /* | |
1844 | * alloc an 0 extra byte to ensure payload is | |
1845 | * '\0'-terminated | |
1846 | */ | |
1847 | allocbytes++; | |
1848 | if ((controlvm_payload_bytes_buffered + bytes) | |
1849 | > MAX_CONTROLVM_PAYLOAD_BYTES) { | |
1850 | if (retry) | |
1851 | *retry = true; | |
1852 | return NULL; | |
1853 | } | |
1854 | ctx = kzalloc(allocbytes, GFP_KERNEL | __GFP_NORETRY); | |
1855 | if (!ctx) { | |
1856 | if (retry) | |
1857 | *retry = true; | |
1858 | return NULL; | |
1859 | } | |
1860 | ||
1861 | ctx->allocbytes = allocbytes; | |
1862 | ctx->param_bytes = bytes; | |
1863 | ctx->curr = NULL; | |
1864 | ctx->bytes_remaining = 0; | |
1865 | ctx->byte_stream = false; | |
1866 | if (local) { | |
1867 | void *p; | |
1868 | ||
1869 | if (addr > virt_to_phys(high_memory - 1)) | |
1870 | goto err_finish_ctx; | |
1871 | p = __va((unsigned long)(addr)); | |
1872 | memcpy(ctx->data, p, bytes); | |
1873 | } else { | |
1874 | void *mapping = memremap(addr, bytes, MEMREMAP_WB); | |
1875 | ||
1876 | if (!mapping) | |
1877 | goto err_finish_ctx; | |
1878 | memcpy(ctx->data, mapping, bytes); | |
1879 | memunmap(mapping); | |
1880 | } | |
1881 | ||
1882 | ctx->byte_stream = true; | |
1883 | controlvm_payload_bytes_buffered += ctx->param_bytes; | |
1884 | ||
1885 | return ctx; | |
1886 | ||
1887 | err_finish_ctx: | |
1888 | parser_done(ctx); | |
1889 | return NULL; | |
1890 | } | |
1891 | ||
511474a5 DK |
1892 | /** |
1893 | * handle_command() - process a controlvm message | |
1894 | * @inmsg: the message to process | |
1895 | * @channel_addr: address of the controlvm channel | |
1896 | * | |
1897 | * Return: | |
1898 | * false - this function will return false only in the case where the | |
1899 | * controlvm message was NOT processed, but processing must be | |
1900 | * retried before reading the next controlvm message; a | |
1901 | * scenario where this can occur is when we need to throttle | |
1902 | * the allocation of memory in which to copy out controlvm | |
1903 | * payload data | |
1904 | * true - processing of the controlvm message completed, | |
1905 | * either successfully or with an error | |
1906 | */ | |
1907 | static bool | |
1908 | handle_command(struct controlvm_message inmsg, u64 channel_addr) | |
1909 | { | |
1910 | struct controlvm_message_packet *cmd = &inmsg.cmd; | |
1911 | u64 parm_addr; | |
1912 | u32 parm_bytes; | |
1913 | struct parser_context *parser_ctx = NULL; | |
1914 | bool local_addr; | |
1915 | struct controlvm_message ackmsg; | |
1916 | ||
1917 | /* create parsing context if necessary */ | |
1918 | local_addr = (inmsg.hdr.flags.test_message == 1); | |
1919 | if (channel_addr == 0) | |
1920 | return true; | |
1921 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; | |
1922 | parm_bytes = inmsg.hdr.payload_bytes; | |
1923 | ||
1924 | /* | |
1925 | * Parameter and channel addresses within test messages actually lie | |
1926 | * within our OS-controlled memory. We need to know that, because it | |
1927 | * makes a difference in how we compute the virtual address. | |
1928 | */ | |
1929 | if (parm_addr && parm_bytes) { | |
1930 | bool retry = false; | |
1931 | ||
1932 | parser_ctx = | |
1933 | parser_init_byte_stream(parm_addr, parm_bytes, | |
1934 | local_addr, &retry); | |
1935 | if (!parser_ctx && retry) | |
1936 | return false; | |
1937 | } | |
1938 | ||
1939 | if (!local_addr) { | |
1940 | controlvm_init_response(&ackmsg, &inmsg.hdr, | |
1941 | CONTROLVM_RESP_SUCCESS); | |
1942 | if (controlvm_channel) | |
1943 | visorchannel_signalinsert(controlvm_channel, | |
1944 | CONTROLVM_QUEUE_ACK, | |
1945 | &ackmsg); | |
1946 | } | |
1947 | switch (inmsg.hdr.id) { | |
1948 | case CONTROLVM_CHIPSET_INIT: | |
1949 | chipset_init(&inmsg); | |
1950 | break; | |
1951 | case CONTROLVM_BUS_CREATE: | |
1952 | bus_create(&inmsg); | |
1953 | break; | |
1954 | case CONTROLVM_BUS_DESTROY: | |
1955 | bus_destroy(&inmsg); | |
1956 | break; | |
1957 | case CONTROLVM_BUS_CONFIGURE: | |
1958 | bus_configure(&inmsg, parser_ctx); | |
1959 | break; | |
1960 | case CONTROLVM_DEVICE_CREATE: | |
1961 | my_device_create(&inmsg); | |
1962 | break; | |
1963 | case CONTROLVM_DEVICE_CHANGESTATE: | |
1964 | if (cmd->device_change_state.flags.phys_device) { | |
1965 | parahotplug_process_message(&inmsg); | |
1966 | } else { | |
1967 | /* | |
1968 | * save the hdr and cmd structures for later use | |
1969 | * when sending back the response to Command | |
1970 | */ | |
1971 | my_device_changestate(&inmsg); | |
1972 | break; | |
1973 | } | |
1974 | break; | |
1975 | case CONTROLVM_DEVICE_DESTROY: | |
1976 | my_device_destroy(&inmsg); | |
1977 | break; | |
1978 | case CONTROLVM_DEVICE_CONFIGURE: | |
1979 | /* no op for now, just send a respond that we passed */ | |
1980 | if (inmsg.hdr.flags.response_expected) | |
1981 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); | |
1982 | break; | |
1983 | case CONTROLVM_CHIPSET_READY: | |
1984 | chipset_ready(&inmsg.hdr); | |
1985 | break; | |
1986 | case CONTROLVM_CHIPSET_SELFTEST: | |
1987 | chipset_selftest(&inmsg.hdr); | |
1988 | break; | |
1989 | case CONTROLVM_CHIPSET_STOP: | |
1990 | chipset_notready(&inmsg.hdr); | |
1991 | break; | |
1992 | default: | |
1993 | if (inmsg.hdr.flags.response_expected) | |
1994 | controlvm_respond | |
1995 | (&inmsg.hdr, | |
1996 | -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); | |
1997 | break; | |
1998 | } | |
1999 | ||
2000 | if (parser_ctx) { | |
2001 | parser_done(parser_ctx); | |
2002 | parser_ctx = NULL; | |
2003 | } | |
2004 | return true; | |
2005 | } | |
2006 | ||
8a285327 DK |
2007 | /** |
2008 | * read_controlvm_event() - retreives the next message from the | |
2009 | * CONTROLVM_QUEUE_EVENT queue in the controlvm | |
2010 | * channel | |
2011 | * @msg: pointer to the retrieved message | |
2012 | * | |
2013 | * Return: true if a valid message was retrieved or false otherwise | |
2014 | */ | |
2015 | static bool | |
2016 | read_controlvm_event(struct controlvm_message *msg) | |
2017 | { | |
2018 | if (visorchannel_signalremove(controlvm_channel, | |
2019 | CONTROLVM_QUEUE_EVENT, msg)) { | |
2020 | /* got a message */ | |
2021 | if (msg->hdr.flags.test_message == 1) | |
2022 | return false; | |
2023 | return true; | |
2024 | } | |
2025 | return false; | |
2026 | } | |
2027 | ||
a9c73937 DK |
2028 | /** |
2029 | * parahotplug_process_list() - remove any request from the list that's been on | |
2030 | * there too long and respond with an error | |
2031 | */ | |
2032 | static void | |
2033 | parahotplug_process_list(void) | |
2034 | { | |
2035 | struct list_head *pos; | |
2036 | struct list_head *tmp; | |
2037 | ||
2038 | spin_lock(¶hotplug_request_list_lock); | |
2039 | ||
2040 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { | |
2041 | struct parahotplug_request *req = | |
2042 | list_entry(pos, struct parahotplug_request, list); | |
2043 | ||
2044 | if (!time_after_eq(jiffies, req->expiration)) | |
2045 | continue; | |
2046 | ||
2047 | list_del(pos); | |
2048 | if (req->msg.hdr.flags.response_expected) | |
2049 | controlvm_respond_physdev_changestate( | |
2050 | &req->msg.hdr, | |
2051 | CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, | |
2052 | req->msg.cmd.device_change_state.state); | |
2053 | parahotplug_request_destroy(req); | |
2054 | } | |
2055 | ||
2056 | spin_unlock(¶hotplug_request_list_lock); | |
2057 | } | |
2058 | ||
3d8394c8 DK |
2059 | static void |
2060 | controlvm_periodic_work(struct work_struct *work) | |
2061 | { | |
2062 | struct controlvm_message inmsg; | |
2063 | bool got_command = false; | |
2064 | bool handle_command_failed = false; | |
2065 | ||
2066 | while (visorchannel_signalremove(controlvm_channel, | |
2067 | CONTROLVM_QUEUE_RESPONSE, | |
2068 | &inmsg)) | |
2069 | ; | |
2070 | if (!got_command) { | |
2071 | if (controlvm_pending_msg_valid) { | |
2072 | /* | |
2073 | * we throttled processing of a prior | |
2074 | * msg, so try to process it again | |
2075 | * rather than reading a new one | |
2076 | */ | |
2077 | inmsg = controlvm_pending_msg; | |
2078 | controlvm_pending_msg_valid = false; | |
2079 | got_command = true; | |
2080 | } else { | |
2081 | got_command = read_controlvm_event(&inmsg); | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | handle_command_failed = false; | |
2086 | while (got_command && (!handle_command_failed)) { | |
2087 | most_recent_message_jiffies = jiffies; | |
2088 | if (handle_command(inmsg, | |
2089 | visorchannel_get_physaddr | |
2090 | (controlvm_channel))) | |
2091 | got_command = read_controlvm_event(&inmsg); | |
2092 | else { | |
2093 | /* | |
2094 | * this is a scenario where throttling | |
2095 | * is required, but probably NOT an | |
2096 | * error...; we stash the current | |
2097 | * controlvm msg so we will attempt to | |
2098 | * reprocess it on our next loop | |
2099 | */ | |
2100 | handle_command_failed = true; | |
2101 | controlvm_pending_msg = inmsg; | |
2102 | controlvm_pending_msg_valid = true; | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | /* parahotplug_worker */ | |
2107 | parahotplug_process_list(); | |
2108 | ||
2109 | if (time_after(jiffies, | |
2110 | most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { | |
2111 | /* | |
2112 | * it's been longer than MIN_IDLE_SECONDS since we | |
2113 | * processed our last controlvm message; slow down the | |
2114 | * polling | |
2115 | */ | |
2116 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) | |
2117 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
2118 | } else { | |
2119 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) | |
2120 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
2121 | } | |
2122 | ||
2123 | schedule_delayed_work(&periodic_controlvm_work, poll_jiffies); | |
2124 | } | |
2125 | ||
55c67dca PB |
2126 | static int |
2127 | visorchipset_init(struct acpi_device *acpi_device) | |
12e364b9 | 2128 | { |
1366a3db | 2129 | int err = -ENODEV; |
d5b3f1dc | 2130 | u64 addr; |
d3368a58 JS |
2131 | uuid_le uuid = SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID; |
2132 | ||
2133 | addr = controlvm_get_channel_address(); | |
2134 | if (!addr) | |
1366a3db | 2135 | goto error; |
12e364b9 | 2136 | |
84982fbf | 2137 | memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); |
12e364b9 | 2138 | |
c732623b | 2139 | controlvm_channel = visorchannel_create_with_lock(addr, 0, |
d3368a58 | 2140 | GFP_KERNEL, uuid); |
c732623b | 2141 | if (!controlvm_channel) |
1366a3db DK |
2142 | goto error; |
2143 | ||
d3368a58 JS |
2144 | if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( |
2145 | visorchannel_get_header(controlvm_channel))) { | |
2146 | initialize_controlvm_payload(); | |
8a1182eb | 2147 | } else { |
1366a3db | 2148 | goto error_destroy_channel; |
8a1182eb BR |
2149 | } |
2150 | ||
5aa8ae57 | 2151 | major_dev = MKDEV(visorchipset_major, 0); |
1366a3db DK |
2152 | err = visorchipset_file_init(major_dev, &controlvm_channel); |
2153 | if (err < 0) | |
2154 | goto error_destroy_payload; | |
12e364b9 | 2155 | |
4da3336c DK |
2156 | /* if booting in a crash kernel */ |
2157 | if (is_kdump_kernel()) | |
2158 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2159 | setup_crash_devices_work_queue); | |
2160 | else | |
2161 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2162 | controlvm_periodic_work); | |
4da3336c | 2163 | |
4da3336c DK |
2164 | most_recent_message_jiffies = jiffies; |
2165 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
0bde2979 | 2166 | schedule_delayed_work(&periodic_controlvm_work, poll_jiffies); |
12e364b9 | 2167 | |
eb34e877 BR |
2168 | visorchipset_platform_device.dev.devt = major_dev; |
2169 | if (platform_device_register(&visorchipset_platform_device) < 0) { | |
4cb005a9 | 2170 | POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); |
1366a3db DK |
2171 | err = -ENODEV; |
2172 | goto error_cancel_work; | |
4cb005a9 | 2173 | } |
12e364b9 | 2174 | POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); |
c79b28f7 | 2175 | |
1366a3db DK |
2176 | err = visorbus_init(); |
2177 | if (err < 0) | |
2178 | goto error_unregister; | |
12e364b9 | 2179 | |
1366a3db DK |
2180 | return 0; |
2181 | ||
2182 | error_unregister: | |
2183 | platform_device_unregister(&visorchipset_platform_device); | |
2184 | ||
2185 | error_cancel_work: | |
2186 | cancel_delayed_work_sync(&periodic_controlvm_work); | |
2187 | visorchipset_file_cleanup(major_dev); | |
2188 | ||
2189 | error_destroy_payload: | |
2190 | destroy_controlvm_payload_info(&controlvm_payload_info); | |
2191 | ||
2192 | error_destroy_channel: | |
2193 | visorchannel_destroy(controlvm_channel); | |
2194 | ||
2195 | error: | |
2196 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, err, POSTCODE_SEVERITY_ERR); | |
2197 | return err; | |
e3420ed6 EA |
2198 | } |
2199 | ||
55c67dca PB |
2200 | static int |
2201 | visorchipset_exit(struct acpi_device *acpi_device) | |
12e364b9 | 2202 | { |
12e364b9 KC |
2203 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2204 | ||
c79b28f7 PB |
2205 | visorbus_exit(); |
2206 | ||
0bde2979 | 2207 | cancel_delayed_work_sync(&periodic_controlvm_work); |
4da3336c | 2208 | destroy_controlvm_payload_info(&controlvm_payload_info); |
1783319f | 2209 | |
c3d9a224 | 2210 | visorchannel_destroy(controlvm_channel); |
8a1182eb | 2211 | |
addceb12 | 2212 | visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); |
04dacacc | 2213 | platform_device_unregister(&visorchipset_platform_device); |
12e364b9 | 2214 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
55c67dca PB |
2215 | |
2216 | return 0; | |
2217 | } | |
2218 | ||
2219 | static const struct acpi_device_id unisys_device_ids[] = { | |
2220 | {"PNP0A07", 0}, | |
2221 | {"", 0}, | |
2222 | }; | |
55c67dca PB |
2223 | |
2224 | static struct acpi_driver unisys_acpi_driver = { | |
2225 | .name = "unisys_acpi", | |
2226 | .class = "unisys_acpi_class", | |
2227 | .owner = THIS_MODULE, | |
2228 | .ids = unisys_device_ids, | |
2229 | .ops = { | |
2230 | .add = visorchipset_init, | |
2231 | .remove = visorchipset_exit, | |
2232 | }, | |
2233 | }; | |
1fc07f99 DK |
2234 | |
2235 | MODULE_DEVICE_TABLE(acpi, unisys_device_ids); | |
2236 | ||
d5b3f1dc EA |
2237 | static __init uint32_t visorutil_spar_detect(void) |
2238 | { | |
2239 | unsigned int eax, ebx, ecx, edx; | |
2240 | ||
0c9f3536 | 2241 | if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) { |
d5b3f1dc EA |
2242 | /* check the ID */ |
2243 | cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx); | |
2244 | return (ebx == UNISYS_SPAR_ID_EBX) && | |
2245 | (ecx == UNISYS_SPAR_ID_ECX) && | |
2246 | (edx == UNISYS_SPAR_ID_EDX); | |
2247 | } else { | |
2248 | return 0; | |
2249 | } | |
2250 | } | |
55c67dca PB |
2251 | |
2252 | static int init_unisys(void) | |
2253 | { | |
2254 | int result; | |
35e606de | 2255 | |
d5b3f1dc | 2256 | if (!visorutil_spar_detect()) |
55c67dca PB |
2257 | return -ENODEV; |
2258 | ||
2259 | result = acpi_bus_register_driver(&unisys_acpi_driver); | |
2260 | if (result) | |
2261 | return -ENODEV; | |
2262 | ||
2263 | pr_info("Unisys Visorchipset Driver Loaded.\n"); | |
2264 | return 0; | |
2265 | }; | |
2266 | ||
2267 | static void exit_unisys(void) | |
2268 | { | |
2269 | acpi_bus_unregister_driver(&unisys_acpi_driver); | |
12e364b9 KC |
2270 | } |
2271 | ||
12e364b9 | 2272 | module_param_named(major, visorchipset_major, int, S_IRUGO); |
b615d628 JS |
2273 | MODULE_PARM_DESC(visorchipset_major, |
2274 | "major device number to use for the device node"); | |
b615d628 | 2275 | |
55c67dca PB |
2276 | module_init(init_unisys); |
2277 | module_exit(exit_unisys); | |
12e364b9 KC |
2278 | |
2279 | MODULE_AUTHOR("Unisys"); | |
2280 | MODULE_LICENSE("GPL"); | |
2281 | MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " | |
2282 | VERSION); | |
2283 | MODULE_VERSION(VERSION); |