Commit | Line | Data |
---|---|---|
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; |
4da3336c | 53 | static int visorchipset_visorbusregwait = 1; /* default is on */ |
46168810 | 54 | static unsigned long controlvm_payload_bytes_buffered; |
12c957dc | 55 | static u32 dump_vhba_bus; |
b615d628 | 56 | |
e3420ed6 EA |
57 | static int |
58 | visorchipset_open(struct inode *inode, struct file *file) | |
59 | { | |
e4feb2f2 | 60 | unsigned int minor_number = iminor(inode); |
e3420ed6 EA |
61 | |
62 | if (minor_number) | |
63 | return -ENODEV; | |
64 | file->private_data = NULL; | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static int | |
69 | visorchipset_release(struct inode *inode, struct file *file) | |
70 | { | |
71 | return 0; | |
72 | } | |
73 | ||
ec17f452 DB |
74 | /* |
75 | * When the controlvm channel is idle for at least MIN_IDLE_SECONDS, | |
76 | * we switch to slow polling mode. As soon as we get a controlvm | |
77 | * message, we switch back to fast polling mode. | |
78 | */ | |
12e364b9 | 79 | #define MIN_IDLE_SECONDS 10 |
52063eca | 80 | static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
2ee0d052 EA |
81 | /* when we got our last controlvm message */ |
82 | static unsigned long most_recent_message_jiffies; | |
12e364b9 | 83 | |
46168810 EA |
84 | struct parser_context { |
85 | unsigned long allocbytes; | |
86 | unsigned long param_bytes; | |
87 | u8 *curr; | |
88 | unsigned long bytes_remaining; | |
89 | bool byte_stream; | |
90 | char data[0]; | |
91 | }; | |
92 | ||
9232d2d6 | 93 | static struct delayed_work periodic_controlvm_work; |
12e364b9 | 94 | |
e3420ed6 EA |
95 | static struct cdev file_cdev; |
96 | static struct visorchannel **file_controlvm_channel; | |
12e364b9 | 97 | |
c3d9a224 | 98 | static struct visorchannel *controlvm_channel; |
12e364b9 | 99 | |
84982fbf | 100 | /* Manages the request payload in the controlvm channel */ |
c1f834eb | 101 | struct visor_controlvm_payload_info { |
3103dc03 | 102 | u8 *ptr; /* pointer to base address of payload pool */ |
ec17f452 DB |
103 | u64 offset; /* |
104 | * offset from beginning of controlvm | |
2ee0d052 EA |
105 | * channel to beginning of payload * pool |
106 | */ | |
b3c55b13 | 107 | u32 bytes; /* number of bytes in payload pool */ |
c1f834eb JS |
108 | }; |
109 | ||
110 | static struct visor_controlvm_payload_info controlvm_payload_info; | |
12e364b9 | 111 | |
ec17f452 DB |
112 | /* |
113 | * The following globals are used to handle the scenario where we are unable to | |
114 | * offload the payload from a controlvm message due to memory requirements. In | |
12e364b9 KC |
115 | * this scenario, we simply stash the controlvm message, then attempt to |
116 | * process it again the next time controlvm_periodic_work() runs. | |
117 | */ | |
7166ed19 | 118 | static struct controlvm_message controlvm_pending_msg; |
c79b28f7 | 119 | static bool controlvm_pending_msg_valid; |
12e364b9 | 120 | |
ec17f452 DB |
121 | /* |
122 | * This describes a buffer and its current state of transfer (e.g., how many | |
12e364b9 KC |
123 | * bytes have already been supplied as putfile data, and how many bytes are |
124 | * remaining) for a putfile_request. | |
125 | */ | |
126 | struct putfile_active_buffer { | |
127 | /* a payload from a controlvm message, containing a file data buffer */ | |
317d9614 | 128 | struct parser_context *parser_ctx; |
12e364b9 | 129 | /* points within data area of parser_ctx to next byte of data */ |
12e364b9 KC |
130 | size_t bytes_remaining; |
131 | }; | |
132 | ||
133 | #define PUTFILE_REQUEST_SIG 0x0906101302281211 | |
ec17f452 DB |
134 | /* |
135 | * This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE | |
136 | * conversation. Structs of this type are dynamically linked into | |
12e364b9 KC |
137 | * <Putfile_request_list>. |
138 | */ | |
139 | struct putfile_request { | |
140 | u64 sig; /* PUTFILE_REQUEST_SIG */ | |
141 | ||
142 | /* header from original TransmitFile request */ | |
98d7b594 | 143 | struct controlvm_message_header controlvm_header; |
12e364b9 KC |
144 | |
145 | /* link to next struct putfile_request */ | |
146 | struct list_head next_putfile_request; | |
147 | ||
ec17f452 DB |
148 | /* |
149 | * head of putfile_buffer_entry list, which describes the data to be | |
12e364b9 KC |
150 | * supplied as putfile data; |
151 | * - this list is added to when controlvm messages come in that supply | |
152 | * file data | |
153 | * - this list is removed from via the hotplug program that is actually | |
2ee0d052 EA |
154 | * consuming these buffers to write as file data |
155 | */ | |
12e364b9 KC |
156 | struct list_head input_buffer_list; |
157 | spinlock_t req_list_lock; /* lock for input_buffer_list */ | |
158 | ||
159 | /* waiters for input_buffer_list to go non-empty */ | |
160 | wait_queue_head_t input_buffer_wq; | |
161 | ||
162 | /* data not yet read within current putfile_buffer_entry */ | |
163 | struct putfile_active_buffer active_buf; | |
164 | ||
ec17f452 DB |
165 | /* |
166 | * <0 = failed, 0 = in-progress, >0 = successful; | |
167 | * note that this must be set with req_list_lock, and if you set <0, | |
168 | * it is your responsibility to also free up all of the other objects | |
169 | * in this struct (like input_buffer_list, active_buf.parser_ctx) | |
170 | * before releasing the lock | |
171 | */ | |
12e364b9 KC |
172 | int completion_status; |
173 | }; | |
174 | ||
12e364b9 KC |
175 | struct parahotplug_request { |
176 | struct list_head list; | |
177 | int id; | |
178 | unsigned long expiration; | |
3ab47701 | 179 | struct controlvm_message msg; |
12e364b9 KC |
180 | }; |
181 | ||
ddf5de53 BR |
182 | static LIST_HEAD(parahotplug_request_list); |
183 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ | |
12e364b9 KC |
184 | static void parahotplug_process_list(void); |
185 | ||
12e364b9 | 186 | /* info for /dev/visorchipset */ |
ec17f452 | 187 | static dev_t major_dev = -1; /*< indicates major num for device */ |
12e364b9 | 188 | |
19f6634f BR |
189 | /* prototypes for attributes */ |
190 | static ssize_t toolaction_show(struct device *dev, | |
8e76e695 | 191 | struct device_attribute *attr, char *buf); |
19f6634f | 192 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 BR |
193 | struct device_attribute *attr, |
194 | const char *buf, size_t count); | |
19f6634f BR |
195 | static DEVICE_ATTR_RW(toolaction); |
196 | ||
54b31229 | 197 | static ssize_t boottotool_show(struct device *dev, |
8e76e695 | 198 | struct device_attribute *attr, char *buf); |
54b31229 | 199 | static ssize_t boottotool_store(struct device *dev, |
8e76e695 BR |
200 | struct device_attribute *attr, const char *buf, |
201 | size_t count); | |
54b31229 BR |
202 | static DEVICE_ATTR_RW(boottotool); |
203 | ||
422af17c | 204 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8e76e695 | 205 | char *buf); |
422af17c | 206 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 207 | const char *buf, size_t count); |
422af17c BR |
208 | static DEVICE_ATTR_RW(error); |
209 | ||
210 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 211 | char *buf); |
422af17c | 212 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 213 | const char *buf, size_t count); |
422af17c BR |
214 | static DEVICE_ATTR_RW(textid); |
215 | ||
216 | static ssize_t remaining_steps_show(struct device *dev, | |
8e76e695 | 217 | struct device_attribute *attr, char *buf); |
422af17c | 218 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 BR |
219 | struct device_attribute *attr, |
220 | const char *buf, size_t count); | |
422af17c BR |
221 | static DEVICE_ATTR_RW(remaining_steps); |
222 | ||
e56fa7cd | 223 | static ssize_t devicedisabled_store(struct device *dev, |
8e76e695 BR |
224 | struct device_attribute *attr, |
225 | const char *buf, size_t count); | |
e56fa7cd BR |
226 | static DEVICE_ATTR_WO(devicedisabled); |
227 | ||
228 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
229 | struct device_attribute *attr, |
230 | const char *buf, size_t count); | |
e56fa7cd BR |
231 | static DEVICE_ATTR_WO(deviceenabled); |
232 | ||
19f6634f BR |
233 | static struct attribute *visorchipset_install_attrs[] = { |
234 | &dev_attr_toolaction.attr, | |
54b31229 | 235 | &dev_attr_boottotool.attr, |
422af17c BR |
236 | &dev_attr_error.attr, |
237 | &dev_attr_textid.attr, | |
238 | &dev_attr_remaining_steps.attr, | |
19f6634f BR |
239 | NULL |
240 | }; | |
241 | ||
242 | static struct attribute_group visorchipset_install_group = { | |
243 | .name = "install", | |
244 | .attrs = visorchipset_install_attrs | |
245 | }; | |
246 | ||
e56fa7cd BR |
247 | static struct attribute *visorchipset_parahotplug_attrs[] = { |
248 | &dev_attr_devicedisabled.attr, | |
249 | &dev_attr_deviceenabled.attr, | |
250 | NULL | |
251 | }; | |
252 | ||
253 | static struct attribute_group visorchipset_parahotplug_group = { | |
254 | .name = "parahotplug", | |
255 | .attrs = visorchipset_parahotplug_attrs | |
256 | }; | |
257 | ||
19f6634f BR |
258 | static const struct attribute_group *visorchipset_dev_groups[] = { |
259 | &visorchipset_install_group, | |
e56fa7cd | 260 | &visorchipset_parahotplug_group, |
19f6634f BR |
261 | NULL |
262 | }; | |
263 | ||
04dacacc DZ |
264 | static void visorchipset_dev_release(struct device *dev) |
265 | { | |
266 | } | |
267 | ||
12e364b9 | 268 | /* /sys/devices/platform/visorchipset */ |
eb34e877 | 269 | static struct platform_device visorchipset_platform_device = { |
12e364b9 KC |
270 | .name = "visorchipset", |
271 | .id = -1, | |
19f6634f | 272 | .dev.groups = visorchipset_dev_groups, |
04dacacc | 273 | .dev.release = visorchipset_dev_release, |
12e364b9 KC |
274 | }; |
275 | ||
276 | /* Function prototypes */ | |
b3168c70 | 277 | static void controlvm_respond(struct controlvm_message_header *msg_hdr, |
98d7b594 BR |
278 | int response); |
279 | static void controlvm_respond_chipset_init( | |
b3168c70 | 280 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 BR |
281 | enum ultra_chipset_feature features); |
282 | static void controlvm_respond_physdev_changestate( | |
b3168c70 | 283 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 284 | struct spar_segment_state state); |
12e364b9 | 285 | |
2ee0deec PB |
286 | static void parser_done(struct parser_context *ctx); |
287 | ||
46168810 | 288 | static struct parser_context * |
fbf35536 | 289 | parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry) |
46168810 EA |
290 | { |
291 | int allocbytes = sizeof(struct parser_context) + bytes; | |
d79f56b5 | 292 | struct parser_context *ctx; |
46168810 EA |
293 | |
294 | if (retry) | |
295 | *retry = false; | |
cc55b5c5 JS |
296 | |
297 | /* | |
298 | * alloc an 0 extra byte to ensure payload is | |
299 | * '\0'-terminated | |
300 | */ | |
301 | allocbytes++; | |
46168810 EA |
302 | if ((controlvm_payload_bytes_buffered + bytes) |
303 | > MAX_CONTROLVM_PAYLOAD_BYTES) { | |
304 | if (retry) | |
305 | *retry = true; | |
d79f56b5 | 306 | return NULL; |
46168810 | 307 | } |
8c395e74 | 308 | ctx = kzalloc(allocbytes, GFP_KERNEL | __GFP_NORETRY); |
46168810 EA |
309 | if (!ctx) { |
310 | if (retry) | |
311 | *retry = true; | |
d79f56b5 | 312 | return NULL; |
46168810 EA |
313 | } |
314 | ||
315 | ctx->allocbytes = allocbytes; | |
316 | ctx->param_bytes = bytes; | |
317 | ctx->curr = NULL; | |
318 | ctx->bytes_remaining = 0; | |
319 | ctx->byte_stream = false; | |
320 | if (local) { | |
321 | void *p; | |
322 | ||
d79f56b5 DK |
323 | if (addr > virt_to_phys(high_memory - 1)) |
324 | goto err_finish_ctx; | |
0e7bf2f4 | 325 | p = __va((unsigned long)(addr)); |
46168810 EA |
326 | memcpy(ctx->data, p, bytes); |
327 | } else { | |
a8deaef3 | 328 | void *mapping = memremap(addr, bytes, MEMREMAP_WB); |
dd412751 | 329 | |
d79f56b5 DK |
330 | if (!mapping) |
331 | goto err_finish_ctx; | |
3103dc03 | 332 | memcpy(ctx->data, mapping, bytes); |
3103dc03 | 333 | memunmap(mapping); |
46168810 | 334 | } |
46168810 | 335 | |
cc55b5c5 | 336 | ctx->byte_stream = true; |
d79f56b5 DK |
337 | controlvm_payload_bytes_buffered += ctx->param_bytes; |
338 | ||
339 | return ctx; | |
340 | ||
341 | err_finish_ctx: | |
342 | parser_done(ctx); | |
343 | return NULL; | |
46168810 EA |
344 | } |
345 | ||
464129ed | 346 | static uuid_le |
46168810 EA |
347 | parser_id_get(struct parser_context *ctx) |
348 | { | |
349 | struct spar_controlvm_parameters_header *phdr = NULL; | |
350 | ||
e4a3dd33 | 351 | if (!ctx) |
46168810 EA |
352 | return NULL_UUID_LE; |
353 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
354 | return phdr->id; | |
355 | } | |
356 | ||
ec17f452 DB |
357 | /* |
358 | * Describes the state from the perspective of which controlvm messages have | |
359 | * been received for a bus or device. | |
2ee0deec PB |
360 | */ |
361 | ||
362 | enum PARSER_WHICH_STRING { | |
363 | PARSERSTRING_INITIATOR, | |
364 | PARSERSTRING_TARGET, | |
365 | PARSERSTRING_CONNECTION, | |
366 | PARSERSTRING_NAME, /* TODO: only PARSERSTRING_NAME is used ? */ | |
367 | }; | |
368 | ||
464129ed | 369 | static void |
2ee0deec PB |
370 | parser_param_start(struct parser_context *ctx, |
371 | enum PARSER_WHICH_STRING which_string) | |
46168810 EA |
372 | { |
373 | struct spar_controlvm_parameters_header *phdr = NULL; | |
374 | ||
e4a3dd33 | 375 | if (!ctx) |
b4d4dfbc BR |
376 | return; |
377 | ||
46168810 EA |
378 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); |
379 | switch (which_string) { | |
380 | case PARSERSTRING_INITIATOR: | |
381 | ctx->curr = ctx->data + phdr->initiator_offset; | |
382 | ctx->bytes_remaining = phdr->initiator_length; | |
383 | break; | |
384 | case PARSERSTRING_TARGET: | |
385 | ctx->curr = ctx->data + phdr->target_offset; | |
386 | ctx->bytes_remaining = phdr->target_length; | |
387 | break; | |
388 | case PARSERSTRING_CONNECTION: | |
389 | ctx->curr = ctx->data + phdr->connection_offset; | |
390 | ctx->bytes_remaining = phdr->connection_length; | |
391 | break; | |
392 | case PARSERSTRING_NAME: | |
393 | ctx->curr = ctx->data + phdr->name_offset; | |
394 | ctx->bytes_remaining = phdr->name_length; | |
395 | break; | |
396 | default: | |
397 | break; | |
398 | } | |
46168810 EA |
399 | } |
400 | ||
464129ed | 401 | static void parser_done(struct parser_context *ctx) |
46168810 EA |
402 | { |
403 | if (!ctx) | |
404 | return; | |
405 | controlvm_payload_bytes_buffered -= ctx->param_bytes; | |
406 | kfree(ctx); | |
407 | } | |
408 | ||
464129ed | 409 | static void * |
46168810 EA |
410 | parser_string_get(struct parser_context *ctx) |
411 | { | |
412 | u8 *pscan; | |
413 | unsigned long nscan; | |
414 | int value_length = -1; | |
415 | void *value = NULL; | |
416 | int i; | |
417 | ||
418 | if (!ctx) | |
419 | return NULL; | |
420 | pscan = ctx->curr; | |
421 | nscan = ctx->bytes_remaining; | |
422 | if (nscan == 0) | |
423 | return NULL; | |
424 | if (!pscan) | |
425 | return NULL; | |
426 | for (i = 0, value_length = -1; i < nscan; i++) | |
427 | if (pscan[i] == '\0') { | |
428 | value_length = i; | |
429 | break; | |
430 | } | |
431 | if (value_length < 0) /* '\0' was not included in the length */ | |
432 | value_length = nscan; | |
8c395e74 | 433 | value = kmalloc(value_length + 1, GFP_KERNEL | __GFP_NORETRY); |
e4a3dd33 | 434 | if (!value) |
46168810 EA |
435 | return NULL; |
436 | if (value_length > 0) | |
437 | memcpy(value, pscan, value_length); | |
0e7bf2f4 | 438 | ((u8 *)(value))[value_length] = '\0'; |
46168810 EA |
439 | return value; |
440 | } | |
441 | ||
d746cb55 VB |
442 | static ssize_t toolaction_show(struct device *dev, |
443 | struct device_attribute *attr, | |
444 | char *buf) | |
19f6634f | 445 | { |
3a56d700 | 446 | u8 tool_action = 0; |
19f6634f | 447 | |
c3d9a224 | 448 | visorchannel_read(controlvm_channel, |
6bb871b6 BR |
449 | offsetof(struct spar_controlvm_channel_protocol, |
450 | tool_action), &tool_action, sizeof(u8)); | |
01f4d85a | 451 | return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action); |
19f6634f BR |
452 | } |
453 | ||
d746cb55 VB |
454 | static ssize_t toolaction_store(struct device *dev, |
455 | struct device_attribute *attr, | |
456 | const char *buf, size_t count) | |
19f6634f | 457 | { |
01f4d85a | 458 | u8 tool_action; |
66e24b76 | 459 | int ret; |
19f6634f | 460 | |
ebec8967 | 461 | if (kstrtou8(buf, 10, &tool_action)) |
66e24b76 BR |
462 | return -EINVAL; |
463 | ||
a07d7c38 TS |
464 | ret = visorchannel_write |
465 | (controlvm_channel, | |
466 | offsetof(struct spar_controlvm_channel_protocol, | |
467 | tool_action), | |
468 | &tool_action, sizeof(u8)); | |
66e24b76 BR |
469 | |
470 | if (ret) | |
471 | return ret; | |
e22a4a0f | 472 | return count; |
19f6634f BR |
473 | } |
474 | ||
d746cb55 VB |
475 | static ssize_t boottotool_show(struct device *dev, |
476 | struct device_attribute *attr, | |
477 | char *buf) | |
54b31229 | 478 | { |
365522d9 | 479 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 480 | |
c3d9a224 | 481 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
482 | offsetof(struct spar_controlvm_channel_protocol, |
483 | efi_spar_ind), &efi_spar_indication, | |
484 | sizeof(struct efi_spar_indication)); | |
54b31229 | 485 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
8e76e695 | 486 | efi_spar_indication.boot_to_tool); |
54b31229 BR |
487 | } |
488 | ||
d746cb55 VB |
489 | static ssize_t boottotool_store(struct device *dev, |
490 | struct device_attribute *attr, | |
491 | const char *buf, size_t count) | |
54b31229 | 492 | { |
66e24b76 | 493 | int val, ret; |
365522d9 | 494 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 495 | |
ebec8967 | 496 | if (kstrtoint(buf, 10, &val)) |
66e24b76 BR |
497 | return -EINVAL; |
498 | ||
365522d9 | 499 | efi_spar_indication.boot_to_tool = val; |
a07d7c38 TS |
500 | ret = visorchannel_write |
501 | (controlvm_channel, | |
502 | offsetof(struct spar_controlvm_channel_protocol, | |
503 | efi_spar_ind), &(efi_spar_indication), | |
504 | sizeof(struct efi_spar_indication)); | |
66e24b76 BR |
505 | |
506 | if (ret) | |
507 | return ret; | |
e22a4a0f | 508 | return count; |
54b31229 | 509 | } |
422af17c BR |
510 | |
511 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 512 | char *buf) |
422af17c | 513 | { |
3a56d700 | 514 | u32 error = 0; |
422af17c | 515 | |
8e76e695 BR |
516 | visorchannel_read(controlvm_channel, |
517 | offsetof(struct spar_controlvm_channel_protocol, | |
518 | installation_error), | |
519 | &error, sizeof(u32)); | |
422af17c BR |
520 | return scnprintf(buf, PAGE_SIZE, "%i\n", error); |
521 | } | |
522 | ||
523 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 524 | const char *buf, size_t count) |
422af17c BR |
525 | { |
526 | u32 error; | |
66e24b76 | 527 | int ret; |
422af17c | 528 | |
ebec8967 | 529 | if (kstrtou32(buf, 10, &error)) |
66e24b76 BR |
530 | return -EINVAL; |
531 | ||
a07d7c38 TS |
532 | ret = visorchannel_write |
533 | (controlvm_channel, | |
534 | offsetof(struct spar_controlvm_channel_protocol, | |
535 | installation_error), | |
536 | &error, sizeof(u32)); | |
66e24b76 BR |
537 | if (ret) |
538 | return ret; | |
e22a4a0f | 539 | return count; |
422af17c BR |
540 | } |
541 | ||
542 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 543 | char *buf) |
422af17c | 544 | { |
3a56d700 | 545 | u32 text_id = 0; |
422af17c | 546 | |
a07d7c38 TS |
547 | visorchannel_read |
548 | (controlvm_channel, | |
549 | offsetof(struct spar_controlvm_channel_protocol, | |
550 | installation_text_id), | |
551 | &text_id, sizeof(u32)); | |
10dbf0e3 | 552 | return scnprintf(buf, PAGE_SIZE, "%i\n", text_id); |
422af17c BR |
553 | } |
554 | ||
555 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 556 | const char *buf, size_t count) |
422af17c | 557 | { |
10dbf0e3 | 558 | u32 text_id; |
66e24b76 | 559 | int ret; |
422af17c | 560 | |
ebec8967 | 561 | if (kstrtou32(buf, 10, &text_id)) |
66e24b76 BR |
562 | return -EINVAL; |
563 | ||
a07d7c38 TS |
564 | ret = visorchannel_write |
565 | (controlvm_channel, | |
566 | offsetof(struct spar_controlvm_channel_protocol, | |
567 | installation_text_id), | |
568 | &text_id, sizeof(u32)); | |
66e24b76 BR |
569 | if (ret) |
570 | return ret; | |
e22a4a0f | 571 | return count; |
422af17c BR |
572 | } |
573 | ||
422af17c | 574 | static ssize_t remaining_steps_show(struct device *dev, |
8e76e695 | 575 | struct device_attribute *attr, char *buf) |
422af17c | 576 | { |
3a56d700 | 577 | u16 remaining_steps = 0; |
422af17c | 578 | |
c3d9a224 | 579 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
580 | offsetof(struct spar_controlvm_channel_protocol, |
581 | installation_remaining_steps), | |
582 | &remaining_steps, sizeof(u16)); | |
ee8da290 | 583 | return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps); |
422af17c BR |
584 | } |
585 | ||
586 | static ssize_t remaining_steps_store(struct device *dev, | |
8e76e695 BR |
587 | struct device_attribute *attr, |
588 | const char *buf, size_t count) | |
422af17c | 589 | { |
ee8da290 | 590 | u16 remaining_steps; |
66e24b76 | 591 | int ret; |
422af17c | 592 | |
ebec8967 | 593 | if (kstrtou16(buf, 10, &remaining_steps)) |
66e24b76 BR |
594 | return -EINVAL; |
595 | ||
a07d7c38 TS |
596 | ret = visorchannel_write |
597 | (controlvm_channel, | |
598 | offsetof(struct spar_controlvm_channel_protocol, | |
599 | installation_remaining_steps), | |
600 | &remaining_steps, sizeof(u16)); | |
66e24b76 BR |
601 | if (ret) |
602 | return ret; | |
e22a4a0f | 603 | return count; |
422af17c BR |
604 | } |
605 | ||
ab0592b9 DZ |
606 | struct visor_busdev { |
607 | u32 bus_no; | |
608 | u32 dev_no; | |
609 | }; | |
610 | ||
611 | static int match_visorbus_dev_by_id(struct device *dev, void *data) | |
612 | { | |
613 | struct visor_device *vdev = to_visor_device(dev); | |
7f44582e | 614 | struct visor_busdev *id = data; |
ab0592b9 DZ |
615 | u32 bus_no = id->bus_no; |
616 | u32 dev_no = id->dev_no; | |
617 | ||
65bd6e46 DZ |
618 | if ((vdev->chipset_bus_no == bus_no) && |
619 | (vdev->chipset_dev_no == dev_no)) | |
ab0592b9 DZ |
620 | return 1; |
621 | ||
622 | return 0; | |
623 | } | |
d1e08637 | 624 | |
ab0592b9 DZ |
625 | struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, |
626 | struct visor_device *from) | |
627 | { | |
628 | struct device *dev; | |
629 | struct device *dev_start = NULL; | |
630 | struct visor_device *vdev = NULL; | |
631 | struct visor_busdev id = { | |
632 | .bus_no = bus_no, | |
633 | .dev_no = dev_no | |
634 | }; | |
635 | ||
636 | if (from) | |
637 | dev_start = &from->device; | |
638 | dev = bus_find_device(&visorbus_type, dev_start, (void *)&id, | |
639 | match_visorbus_dev_by_id); | |
640 | if (dev) | |
641 | vdev = to_visor_device(dev); | |
642 | return vdev; | |
643 | } | |
ab0592b9 | 644 | |
12e364b9 | 645 | static void |
3ab47701 | 646 | chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
647 | { |
648 | static int chipset_inited; | |
b9b141e8 | 649 | enum ultra_chipset_feature features = 0; |
12e364b9 KC |
650 | int rc = CONTROLVM_RESP_SUCCESS; |
651 | ||
652 | POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
653 | if (chipset_inited) { | |
22ad57ba | 654 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
5233d1eb | 655 | goto out_respond; |
12e364b9 KC |
656 | } |
657 | chipset_inited = 1; | |
658 | POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); | |
659 | ||
ec17f452 DB |
660 | /* |
661 | * Set features to indicate we support parahotplug (if Command | |
2ee0d052 EA |
662 | * also supports it). |
663 | */ | |
12e364b9 | 664 | features = |
2ea5117b | 665 | inmsg->cmd.init_chipset. |
12e364b9 KC |
666 | features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; |
667 | ||
ec17f452 DB |
668 | /* |
669 | * Set the "reply" bit so Command knows this is a | |
2ee0d052 EA |
670 | * features-aware driver. |
671 | */ | |
12e364b9 KC |
672 | features |= ULTRA_CHIPSET_FEATURE_REPLY; |
673 | ||
5233d1eb | 674 | out_respond: |
98d7b594 | 675 | if (inmsg->hdr.flags.response_expected) |
12e364b9 KC |
676 | controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
677 | } | |
678 | ||
679 | static void | |
3ab47701 | 680 | controlvm_init_response(struct controlvm_message *msg, |
b3168c70 | 681 | struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 682 | { |
3ab47701 | 683 | memset(msg, 0, sizeof(struct controlvm_message)); |
b3168c70 | 684 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); |
98d7b594 BR |
685 | msg->hdr.payload_bytes = 0; |
686 | msg->hdr.payload_vm_offset = 0; | |
687 | msg->hdr.payload_max_bytes = 0; | |
12e364b9 | 688 | if (response < 0) { |
98d7b594 | 689 | msg->hdr.flags.failed = 1; |
0e7bf2f4 | 690 | msg->hdr.completion_status = (u32)(-response); |
12e364b9 KC |
691 | } |
692 | } | |
693 | ||
694 | static void | |
b3168c70 | 695 | controlvm_respond(struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 696 | { |
3ab47701 | 697 | struct controlvm_message outmsg; |
26eb2c0c | 698 | |
b3168c70 | 699 | controlvm_init_response(&outmsg, msg_hdr, response); |
2098dbd1 | 700 | if (outmsg.hdr.flags.test_message == 1) |
12e364b9 | 701 | return; |
2098dbd1 | 702 | |
c3d9a224 | 703 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 704 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
705 | return; |
706 | } | |
707 | } | |
708 | ||
709 | static void | |
b3168c70 | 710 | controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, |
98d7b594 | 711 | int response, |
b9b141e8 | 712 | enum ultra_chipset_feature features) |
12e364b9 | 713 | { |
3ab47701 | 714 | struct controlvm_message outmsg; |
26eb2c0c | 715 | |
b3168c70 | 716 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b | 717 | outmsg.cmd.init_chipset.features = features; |
c3d9a224 | 718 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 719 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
720 | return; |
721 | } | |
722 | } | |
723 | ||
98d7b594 | 724 | static void controlvm_respond_physdev_changestate( |
b3168c70 | 725 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 726 | struct spar_segment_state state) |
12e364b9 | 727 | { |
3ab47701 | 728 | struct controlvm_message outmsg; |
26eb2c0c | 729 | |
b3168c70 | 730 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b BR |
731 | outmsg.cmd.device_change_state.state = state; |
732 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
c3d9a224 | 733 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 734 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
735 | return; |
736 | } | |
737 | } | |
738 | ||
2ee0deec PB |
739 | enum crash_obj_type { |
740 | CRASH_DEV, | |
741 | CRASH_BUS, | |
742 | }; | |
743 | ||
12c957dc TS |
744 | static void |
745 | save_crash_message(struct controlvm_message *msg, enum crash_obj_type typ) | |
746 | { | |
747 | u32 local_crash_msg_offset; | |
748 | u16 local_crash_msg_count; | |
749 | ||
750 | if (visorchannel_read(controlvm_channel, | |
751 | offsetof(struct spar_controlvm_channel_protocol, | |
752 | saved_crash_message_count), | |
753 | &local_crash_msg_count, sizeof(u16)) < 0) { | |
754 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, | |
755 | POSTCODE_SEVERITY_ERR); | |
756 | return; | |
757 | } | |
758 | ||
759 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { | |
760 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, | |
761 | local_crash_msg_count, | |
762 | POSTCODE_SEVERITY_ERR); | |
763 | return; | |
764 | } | |
765 | ||
766 | if (visorchannel_read(controlvm_channel, | |
767 | offsetof(struct spar_controlvm_channel_protocol, | |
768 | saved_crash_message_offset), | |
769 | &local_crash_msg_offset, sizeof(u32)) < 0) { | |
770 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, | |
771 | POSTCODE_SEVERITY_ERR); | |
772 | return; | |
773 | } | |
774 | ||
775 | if (typ == CRASH_BUS) { | |
776 | if (visorchannel_write(controlvm_channel, | |
777 | local_crash_msg_offset, | |
778 | msg, | |
779 | sizeof(struct controlvm_message)) < 0) { | |
780 | POSTCODE_LINUX_2(SAVE_MSG_BUS_FAILURE_PC, | |
781 | POSTCODE_SEVERITY_ERR); | |
782 | return; | |
783 | } | |
784 | } else { | |
785 | local_crash_msg_offset += sizeof(struct controlvm_message); | |
786 | if (visorchannel_write(controlvm_channel, | |
787 | local_crash_msg_offset, | |
788 | msg, | |
789 | sizeof(struct controlvm_message)) < 0) { | |
790 | POSTCODE_LINUX_2(SAVE_MSG_DEV_FAILURE_PC, | |
791 | POSTCODE_SEVERITY_ERR); | |
792 | return; | |
793 | } | |
794 | } | |
795 | } | |
796 | ||
12e364b9 | 797 | static void |
0274b5ae DZ |
798 | bus_responder(enum controlvm_id cmd_id, |
799 | struct controlvm_message_header *pending_msg_hdr, | |
3032aedd | 800 | int response) |
12e364b9 | 801 | { |
e4a3dd33 | 802 | if (!pending_msg_hdr) |
0274b5ae | 803 | return; /* no controlvm response needed */ |
12e364b9 | 804 | |
0274b5ae | 805 | if (pending_msg_hdr->id != (u32)cmd_id) |
12e364b9 | 806 | return; |
0aca7844 | 807 | |
0274b5ae | 808 | controlvm_respond(pending_msg_hdr, response); |
12e364b9 KC |
809 | } |
810 | ||
811 | static void | |
fbb31f48 | 812 | device_changestate_responder(enum controlvm_id cmd_id, |
a298bc0b | 813 | struct visor_device *p, int response, |
fbb31f48 | 814 | struct spar_segment_state response_state) |
12e364b9 | 815 | { |
3ab47701 | 816 | struct controlvm_message outmsg; |
a298bc0b DZ |
817 | u32 bus_no = p->chipset_bus_no; |
818 | u32 dev_no = p->chipset_dev_no; | |
12e364b9 | 819 | |
e4a3dd33 | 820 | if (!p->pending_msg_hdr) |
12e364b9 | 821 | return; /* no controlvm response needed */ |
0274b5ae | 822 | if (p->pending_msg_hdr->id != cmd_id) |
12e364b9 | 823 | return; |
12e364b9 | 824 | |
0274b5ae | 825 | controlvm_init_response(&outmsg, p->pending_msg_hdr, response); |
12e364b9 | 826 | |
fbb31f48 BR |
827 | outmsg.cmd.device_change_state.bus_no = bus_no; |
828 | outmsg.cmd.device_change_state.dev_no = dev_no; | |
829 | outmsg.cmd.device_change_state.state = response_state; | |
12e364b9 | 830 | |
c3d9a224 | 831 | if (!visorchannel_signalinsert(controlvm_channel, |
0aca7844 | 832 | CONTROLVM_QUEUE_REQUEST, &outmsg)) |
12e364b9 | 833 | return; |
12e364b9 KC |
834 | } |
835 | ||
836 | static void | |
0274b5ae DZ |
837 | device_responder(enum controlvm_id cmd_id, |
838 | struct controlvm_message_header *pending_msg_hdr, | |
b4b598fd | 839 | int response) |
12e364b9 | 840 | { |
e4a3dd33 | 841 | if (!pending_msg_hdr) |
12e364b9 | 842 | return; /* no controlvm response needed */ |
0aca7844 | 843 | |
0274b5ae | 844 | if (pending_msg_hdr->id != (u32)cmd_id) |
12e364b9 | 845 | return; |
0aca7844 | 846 | |
0274b5ae | 847 | controlvm_respond(pending_msg_hdr, response); |
12e364b9 KC |
848 | } |
849 | ||
850 | static void | |
d32517e3 | 851 | bus_epilog(struct visor_device *bus_info, |
2836c6a8 | 852 | u32 cmd, struct controlvm_message_header *msg_hdr, |
f4c11551 | 853 | int response, bool need_response) |
12e364b9 | 854 | { |
0274b5ae | 855 | struct controlvm_message_header *pmsg_hdr = NULL; |
12e364b9 | 856 | |
0274b5ae | 857 | if (!bus_info) { |
ec17f452 DB |
858 | /* |
859 | * relying on a valid passed in response code | |
860 | * be lazy and re-use msg_hdr for this failure, is this ok?? | |
861 | */ | |
0274b5ae | 862 | pmsg_hdr = msg_hdr; |
87241ab8 | 863 | goto out_respond; |
0274b5ae DZ |
864 | } |
865 | ||
866 | if (bus_info->pending_msg_hdr) { | |
867 | /* only non-NULL if dev is still waiting on a response */ | |
868 | response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; | |
869 | pmsg_hdr = bus_info->pending_msg_hdr; | |
87241ab8 | 870 | goto out_respond; |
0274b5ae | 871 | } |
0aca7844 | 872 | |
2836c6a8 | 873 | if (need_response) { |
0274b5ae DZ |
874 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); |
875 | if (!pmsg_hdr) { | |
368acb3f DK |
876 | POSTCODE_LINUX_4(MALLOC_FAILURE_PC, cmd, |
877 | bus_info->chipset_bus_no, | |
878 | POSTCODE_SEVERITY_ERR); | |
87241ab8 | 879 | return; |
0274b5ae DZ |
880 | } |
881 | ||
882 | memcpy(pmsg_hdr, msg_hdr, | |
98d7b594 | 883 | sizeof(struct controlvm_message_header)); |
0274b5ae | 884 | bus_info->pending_msg_hdr = pmsg_hdr; |
75c1f8b7 | 885 | } |
12e364b9 | 886 | |
12e364b9 KC |
887 | if (response == CONTROLVM_RESP_SUCCESS) { |
888 | switch (cmd) { | |
889 | case CONTROLVM_BUS_CREATE: | |
87241ab8 | 890 | chipset_bus_create(bus_info); |
12e364b9 KC |
891 | break; |
892 | case CONTROLVM_BUS_DESTROY: | |
87241ab8 | 893 | chipset_bus_destroy(bus_info); |
12e364b9 KC |
894 | break; |
895 | } | |
896 | } | |
368acb3f | 897 | |
87241ab8 | 898 | out_respond: |
4a185e54 | 899 | bus_responder(cmd, pmsg_hdr, response); |
12e364b9 KC |
900 | } |
901 | ||
902 | static void | |
a298bc0b | 903 | device_epilog(struct visor_device *dev_info, |
b4b598fd | 904 | struct spar_segment_state state, u32 cmd, |
2836c6a8 | 905 | struct controlvm_message_header *msg_hdr, int response, |
f4c11551 | 906 | bool need_response, bool for_visorbus) |
12e364b9 | 907 | { |
0274b5ae | 908 | struct controlvm_message_header *pmsg_hdr = NULL; |
12e364b9 | 909 | |
0274b5ae | 910 | if (!dev_info) { |
ec17f452 DB |
911 | /* |
912 | * relying on a valid passed in response code | |
913 | * be lazy and re-use msg_hdr for this failure, is this ok?? | |
914 | */ | |
0274b5ae | 915 | pmsg_hdr = msg_hdr; |
87241ab8 | 916 | goto out_respond; |
0274b5ae DZ |
917 | } |
918 | ||
919 | if (dev_info->pending_msg_hdr) { | |
920 | /* only non-NULL if dev is still waiting on a response */ | |
921 | response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; | |
922 | pmsg_hdr = dev_info->pending_msg_hdr; | |
87241ab8 | 923 | goto out_respond; |
0274b5ae DZ |
924 | } |
925 | ||
2836c6a8 | 926 | if (need_response) { |
0274b5ae DZ |
927 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); |
928 | if (!pmsg_hdr) { | |
929 | response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
87241ab8 | 930 | goto out_respond; |
0274b5ae DZ |
931 | } |
932 | ||
933 | memcpy(pmsg_hdr, msg_hdr, | |
98d7b594 | 934 | sizeof(struct controlvm_message_header)); |
0274b5ae | 935 | dev_info->pending_msg_hdr = pmsg_hdr; |
75c1f8b7 | 936 | } |
12e364b9 | 937 | |
12e364b9 KC |
938 | if (response >= 0) { |
939 | switch (cmd) { | |
940 | case CONTROLVM_DEVICE_CREATE: | |
87241ab8 | 941 | chipset_device_create(dev_info); |
12e364b9 KC |
942 | break; |
943 | case CONTROLVM_DEVICE_CHANGESTATE: | |
944 | /* ServerReady / ServerRunning / SegmentStateRunning */ | |
bd0d2dcc BR |
945 | if (state.alive == segment_state_running.alive && |
946 | state.operating == | |
947 | segment_state_running.operating) { | |
87241ab8 | 948 | chipset_device_resume(dev_info); |
12e364b9 KC |
949 | } |
950 | /* ServerNotReady / ServerLost / SegmentStateStandby */ | |
bd0d2dcc | 951 | else if (state.alive == segment_state_standby.alive && |
3f833b54 | 952 | state.operating == |
bd0d2dcc | 953 | segment_state_standby.operating) { |
ec17f452 DB |
954 | /* |
955 | * technically this is standby case | |
12e364b9 KC |
956 | * where server is lost |
957 | */ | |
87241ab8 | 958 | chipset_device_pause(dev_info); |
12e364b9 KC |
959 | } |
960 | break; | |
961 | case CONTROLVM_DEVICE_DESTROY: | |
87241ab8 | 962 | chipset_device_destroy(dev_info); |
12e364b9 KC |
963 | break; |
964 | } | |
965 | } | |
3cb3fa3b | 966 | |
87241ab8 | 967 | out_respond: |
3cb3fa3b | 968 | device_responder(cmd, pmsg_hdr, response); |
12e364b9 KC |
969 | } |
970 | ||
971 | static void | |
3ab47701 | 972 | bus_create(struct controlvm_message *inmsg) |
12e364b9 | 973 | { |
2ea5117b | 974 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 975 | u32 bus_no = cmd->create_bus.bus_no; |
12e364b9 | 976 | int rc = CONTROLVM_RESP_SUCCESS; |
d32517e3 | 977 | struct visor_device *bus_info; |
b32c4997 | 978 | struct visorchannel *visorchannel; |
12e364b9 | 979 | |
d32517e3 | 980 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
6c5fed35 BR |
981 | if (bus_info && (bus_info->state.created == 1)) { |
982 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 983 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 984 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
9fd04060 | 985 | goto out_bus_epilog; |
12e364b9 | 986 | } |
6c5fed35 BR |
987 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
988 | if (!bus_info) { | |
989 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 990 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 991 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
9fd04060 | 992 | goto out_bus_epilog; |
12e364b9 KC |
993 | } |
994 | ||
4abce83d | 995 | INIT_LIST_HEAD(&bus_info->list_all); |
d32517e3 DZ |
996 | bus_info->chipset_bus_no = bus_no; |
997 | bus_info->chipset_dev_no = BUS_ROOT_DEVICE; | |
12e364b9 | 998 | |
6c5fed35 | 999 | POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1000 | |
b32c4997 DZ |
1001 | visorchannel = visorchannel_create(cmd->create_bus.channel_addr, |
1002 | cmd->create_bus.channel_bytes, | |
1003 | GFP_KERNEL, | |
1004 | cmd->create_bus.bus_data_type_uuid); | |
1005 | ||
1006 | if (!visorchannel) { | |
1007 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
1008 | POSTCODE_SEVERITY_ERR); | |
1009 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1010 | kfree(bus_info); | |
1011 | bus_info = NULL; | |
9fd04060 | 1012 | goto out_bus_epilog; |
b32c4997 DZ |
1013 | } |
1014 | bus_info->visorchannel = visorchannel; | |
12c957dc TS |
1015 | if (uuid_le_cmp(cmd->create_bus.bus_inst_uuid, spar_siovm_uuid) == 0) { |
1016 | dump_vhba_bus = bus_no; | |
1017 | save_crash_message(inmsg, CRASH_BUS); | |
1018 | } | |
12e364b9 | 1019 | |
6c5fed35 | 1020 | POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1021 | |
9fd04060 | 1022 | out_bus_epilog: |
3032aedd | 1023 | bus_epilog(bus_info, CONTROLVM_BUS_CREATE, &inmsg->hdr, |
98d7b594 | 1024 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1025 | } |
1026 | ||
1027 | static void | |
3ab47701 | 1028 | bus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1029 | { |
2ea5117b | 1030 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1031 | u32 bus_no = cmd->destroy_bus.bus_no; |
d32517e3 | 1032 | struct visor_device *bus_info; |
12e364b9 KC |
1033 | int rc = CONTROLVM_RESP_SUCCESS; |
1034 | ||
d32517e3 | 1035 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
dff54cd6 | 1036 | if (!bus_info) |
22ad57ba | 1037 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
dff54cd6 | 1038 | else if (bus_info->state.created == 0) |
22ad57ba | 1039 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1040 | |
3032aedd | 1041 | bus_epilog(bus_info, CONTROLVM_BUS_DESTROY, &inmsg->hdr, |
98d7b594 | 1042 | rc, inmsg->hdr.flags.response_expected == 1); |
d32517e3 DZ |
1043 | |
1044 | /* bus_info is freed as part of the busdevice_release function */ | |
12e364b9 KC |
1045 | } |
1046 | ||
1047 | static void | |
317d9614 BR |
1048 | bus_configure(struct controlvm_message *inmsg, |
1049 | struct parser_context *parser_ctx) | |
12e364b9 | 1050 | { |
2ea5117b | 1051 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e | 1052 | u32 bus_no; |
d32517e3 | 1053 | struct visor_device *bus_info; |
12e364b9 | 1054 | int rc = CONTROLVM_RESP_SUCCESS; |
12e364b9 | 1055 | |
654bada0 BR |
1056 | bus_no = cmd->configure_bus.bus_no; |
1057 | POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no, | |
1058 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1059 | |
d32517e3 | 1060 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
654bada0 BR |
1061 | if (!bus_info) { |
1062 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1063 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1064 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1065 | } else if (bus_info->state.created == 0) { |
1066 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1067 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1068 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
e4a3dd33 | 1069 | } else if (bus_info->pending_msg_hdr) { |
654bada0 | 1070 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, |
12e364b9 | 1071 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1072 | rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; |
654bada0 | 1073 | } else { |
a07d7c38 TS |
1074 | visorchannel_set_clientpartition |
1075 | (bus_info->visorchannel, | |
1076 | cmd->configure_bus.guest_handle); | |
654bada0 BR |
1077 | bus_info->partition_uuid = parser_id_get(parser_ctx); |
1078 | parser_param_start(parser_ctx, PARSERSTRING_NAME); | |
1079 | bus_info->name = parser_string_get(parser_ctx); | |
1080 | ||
654bada0 BR |
1081 | POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no, |
1082 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1083 | } |
3032aedd | 1084 | bus_epilog(bus_info, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, |
98d7b594 | 1085 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1086 | } |
1087 | ||
1088 | static void | |
3ab47701 | 1089 | my_device_create(struct controlvm_message *inmsg) |
12e364b9 | 1090 | { |
2ea5117b | 1091 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1092 | u32 bus_no = cmd->create_device.bus_no; |
1093 | u32 dev_no = cmd->create_device.dev_no; | |
a298bc0b | 1094 | struct visor_device *dev_info = NULL; |
d32517e3 | 1095 | struct visor_device *bus_info; |
b32c4997 | 1096 | struct visorchannel *visorchannel; |
12e364b9 KC |
1097 | int rc = CONTROLVM_RESP_SUCCESS; |
1098 | ||
a298bc0b DZ |
1099 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
1100 | if (!bus_info) { | |
c60c8e26 | 1101 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1102 | POSTCODE_SEVERITY_ERR); |
a298bc0b | 1103 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c6af7a9c | 1104 | goto out_respond; |
12e364b9 | 1105 | } |
a298bc0b DZ |
1106 | |
1107 | if (bus_info->state.created == 0) { | |
c60c8e26 | 1108 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1109 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1110 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c6af7a9c | 1111 | goto out_respond; |
12e364b9 | 1112 | } |
a298bc0b DZ |
1113 | |
1114 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); | |
1115 | if (dev_info && (dev_info->state.created == 1)) { | |
c60c8e26 | 1116 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1117 | POSTCODE_SEVERITY_ERR); |
a298bc0b | 1118 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
c6af7a9c | 1119 | goto out_respond; |
12e364b9 | 1120 | } |
a298bc0b | 1121 | |
c60c8e26 BR |
1122 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
1123 | if (!dev_info) { | |
1124 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1125 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1126 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
c6af7a9c | 1127 | goto out_respond; |
12e364b9 | 1128 | } |
97a84f12 | 1129 | |
a298bc0b DZ |
1130 | dev_info->chipset_bus_no = bus_no; |
1131 | dev_info->chipset_dev_no = dev_no; | |
1132 | dev_info->inst = cmd->create_device.dev_inst_uuid; | |
1133 | ||
1134 | /* not sure where the best place to set the 'parent' */ | |
1135 | dev_info->device.parent = &bus_info->device; | |
1136 | ||
c60c8e26 | 1137 | POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, |
12e364b9 KC |
1138 | POSTCODE_SEVERITY_INFO); |
1139 | ||
a3ef1a8e DK |
1140 | visorchannel = |
1141 | visorchannel_create_with_lock(cmd->create_device.channel_addr, | |
1142 | cmd->create_device.channel_bytes, | |
1143 | GFP_KERNEL, | |
1144 | cmd->create_device.data_type_uuid); | |
b32c4997 DZ |
1145 | |
1146 | if (!visorchannel) { | |
1147 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
1148 | POSTCODE_SEVERITY_ERR); | |
1149 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1150 | kfree(dev_info); | |
1151 | dev_info = NULL; | |
c6af7a9c | 1152 | goto out_respond; |
b32c4997 DZ |
1153 | } |
1154 | dev_info->visorchannel = visorchannel; | |
1155 | dev_info->channel_type_guid = cmd->create_device.data_type_uuid; | |
12c957dc TS |
1156 | if (uuid_le_cmp(cmd->create_device.data_type_uuid, |
1157 | spar_vhba_channel_protocol_uuid) == 0) | |
1158 | save_crash_message(inmsg, CRASH_DEV); | |
1159 | ||
c60c8e26 | 1160 | POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no, |
12e364b9 | 1161 | POSTCODE_SEVERITY_INFO); |
c6af7a9c | 1162 | out_respond: |
b4b598fd | 1163 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1164 | CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, |
4da3336c | 1165 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1166 | } |
1167 | ||
1168 | static void | |
3ab47701 | 1169 | my_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 1170 | { |
2ea5117b | 1171 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1172 | u32 bus_no = cmd->device_change_state.bus_no; |
1173 | u32 dev_no = cmd->device_change_state.dev_no; | |
2ea5117b | 1174 | struct spar_segment_state state = cmd->device_change_state.state; |
a298bc0b | 1175 | struct visor_device *dev_info; |
12e364b9 KC |
1176 | int rc = CONTROLVM_RESP_SUCCESS; |
1177 | ||
a298bc0b | 1178 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
0278a905 BR |
1179 | if (!dev_info) { |
1180 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1181 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1182 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
0278a905 BR |
1183 | } else if (dev_info->state.created == 0) { |
1184 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1185 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1186 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
12e364b9 | 1187 | } |
0278a905 | 1188 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1189 | device_epilog(dev_info, state, |
0278a905 | 1190 | CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, |
4da3336c | 1191 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1192 | } |
1193 | ||
1194 | static void | |
3ab47701 | 1195 | my_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1196 | { |
2ea5117b | 1197 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1198 | u32 bus_no = cmd->destroy_device.bus_no; |
1199 | u32 dev_no = cmd->destroy_device.dev_no; | |
a298bc0b | 1200 | struct visor_device *dev_info; |
12e364b9 KC |
1201 | int rc = CONTROLVM_RESP_SUCCESS; |
1202 | ||
a298bc0b | 1203 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
61715c8b | 1204 | if (!dev_info) |
22ad57ba | 1205 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
61715c8b | 1206 | else if (dev_info->state.created == 0) |
22ad57ba | 1207 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1208 | |
61715c8b | 1209 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1210 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1211 | CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, |
4da3336c | 1212 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1213 | } |
1214 | ||
ec17f452 DB |
1215 | /** |
1216 | * initialize_controlvm_payload_info() - init controlvm_payload_info struct | |
1217 | * @phys_addr: the physical address of controlvm channel | |
1218 | * @offset: the offset to payload | |
1219 | * @bytes: the size of the payload in bytes | |
1220 | * @info: the returning valid struct | |
1221 | * | |
1222 | * When provided with the physical address of the controlvm channel | |
12e364b9 KC |
1223 | * (phys_addr), the offset to the payload area we need to manage |
1224 | * (offset), and the size of this payload area (bytes), fills in the | |
ec17f452 DB |
1225 | * controlvm_payload_info struct. |
1226 | * | |
1227 | * Return: CONTROLVM_RESP_SUCCESS for success or a negative for failure | |
12e364b9 KC |
1228 | */ |
1229 | static int | |
d5b3f1dc | 1230 | initialize_controlvm_payload_info(u64 phys_addr, u64 offset, u32 bytes, |
c1f834eb | 1231 | struct visor_controlvm_payload_info *info) |
12e364b9 | 1232 | { |
3103dc03 | 1233 | u8 *payload = NULL; |
12e364b9 | 1234 | |
dde29996 DK |
1235 | if (!info) |
1236 | return -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; | |
1237 | ||
c1f834eb | 1238 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
dde29996 DK |
1239 | if ((offset == 0) || (bytes == 0)) |
1240 | return -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; | |
1241 | ||
3103dc03 | 1242 | payload = memremap(phys_addr + offset, bytes, MEMREMAP_WB); |
dde29996 DK |
1243 | if (!payload) |
1244 | return -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; | |
12e364b9 KC |
1245 | |
1246 | info->offset = offset; | |
1247 | info->bytes = bytes; | |
1248 | info->ptr = payload; | |
12e364b9 | 1249 | |
dde29996 | 1250 | return CONTROLVM_RESP_SUCCESS; |
12e364b9 KC |
1251 | } |
1252 | ||
1253 | static void | |
c1f834eb | 1254 | destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info) |
12e364b9 | 1255 | { |
597c338f | 1256 | if (info->ptr) { |
3103dc03 | 1257 | memunmap(info->ptr); |
12e364b9 KC |
1258 | info->ptr = NULL; |
1259 | } | |
c1f834eb | 1260 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 KC |
1261 | } |
1262 | ||
1263 | static void | |
1264 | initialize_controlvm_payload(void) | |
1265 | { | |
d5b3f1dc | 1266 | u64 phys_addr = visorchannel_get_physaddr(controlvm_channel); |
cafefc0c BR |
1267 | u64 payload_offset = 0; |
1268 | u32 payload_bytes = 0; | |
26eb2c0c | 1269 | |
c3d9a224 | 1270 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1271 | offsetof(struct spar_controlvm_channel_protocol, |
1272 | request_payload_offset), | |
cafefc0c | 1273 | &payload_offset, sizeof(payload_offset)) < 0) { |
12e364b9 KC |
1274 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1275 | POSTCODE_SEVERITY_ERR); | |
1276 | return; | |
1277 | } | |
c3d9a224 | 1278 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1279 | offsetof(struct spar_controlvm_channel_protocol, |
1280 | request_payload_bytes), | |
cafefc0c | 1281 | &payload_bytes, sizeof(payload_bytes)) < 0) { |
12e364b9 KC |
1282 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1283 | POSTCODE_SEVERITY_ERR); | |
1284 | return; | |
1285 | } | |
1286 | initialize_controlvm_payload_info(phys_addr, | |
cafefc0c | 1287 | payload_offset, payload_bytes, |
84982fbf | 1288 | &controlvm_payload_info); |
12e364b9 KC |
1289 | } |
1290 | ||
ec17f452 DB |
1291 | /** |
1292 | * visorchipset_chipset_ready() - sends chipset_ready action | |
1293 | * | |
1294 | * Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1295 | * | |
1296 | * Return: CONTROLVM_RESP_SUCCESS | |
12e364b9 | 1297 | */ |
d3368a58 | 1298 | static int |
12e364b9 KC |
1299 | visorchipset_chipset_ready(void) |
1300 | { | |
eb34e877 | 1301 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); |
12e364b9 KC |
1302 | return CONTROLVM_RESP_SUCCESS; |
1303 | } | |
12e364b9 | 1304 | |
d3368a58 | 1305 | static int |
12e364b9 KC |
1306 | visorchipset_chipset_selftest(void) |
1307 | { | |
1308 | char env_selftest[20]; | |
1309 | char *envp[] = { env_selftest, NULL }; | |
26eb2c0c | 1310 | |
12e364b9 | 1311 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); |
eb34e877 | 1312 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1313 | envp); |
1314 | return CONTROLVM_RESP_SUCCESS; | |
1315 | } | |
12e364b9 | 1316 | |
ec17f452 DB |
1317 | /** |
1318 | * visorchipset_chipset_notready() - sends chipset_notready action | |
1319 | * | |
1320 | * Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1321 | * | |
1322 | * Return: CONTROLVM_RESP_SUCCESS | |
12e364b9 | 1323 | */ |
d3368a58 | 1324 | static int |
12e364b9 KC |
1325 | visorchipset_chipset_notready(void) |
1326 | { | |
eb34e877 | 1327 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); |
12e364b9 KC |
1328 | return CONTROLVM_RESP_SUCCESS; |
1329 | } | |
12e364b9 KC |
1330 | |
1331 | static void | |
77a0449d | 1332 | chipset_ready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1333 | { |
1334 | int rc = visorchipset_chipset_ready(); | |
26eb2c0c | 1335 | |
12e364b9 KC |
1336 | if (rc != CONTROLVM_RESP_SUCCESS) |
1337 | rc = -rc; | |
260d8992 | 1338 | if (msg_hdr->flags.response_expected) |
77a0449d | 1339 | controlvm_respond(msg_hdr, rc); |
12e364b9 KC |
1340 | } |
1341 | ||
1342 | static void | |
77a0449d | 1343 | chipset_selftest(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1344 | { |
1345 | int rc = visorchipset_chipset_selftest(); | |
26eb2c0c | 1346 | |
12e364b9 KC |
1347 | if (rc != CONTROLVM_RESP_SUCCESS) |
1348 | rc = -rc; | |
77a0449d BR |
1349 | if (msg_hdr->flags.response_expected) |
1350 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1351 | } |
1352 | ||
1353 | static void | |
77a0449d | 1354 | chipset_notready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1355 | { |
1356 | int rc = visorchipset_chipset_notready(); | |
26eb2c0c | 1357 | |
12e364b9 KC |
1358 | if (rc != CONTROLVM_RESP_SUCCESS) |
1359 | rc = -rc; | |
77a0449d BR |
1360 | if (msg_hdr->flags.response_expected) |
1361 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1362 | } |
1363 | ||
ec17f452 DB |
1364 | /** |
1365 | * read_controlvm_event() - retreives the next message from the | |
1366 | * CONTROLVM_QUEUE_EVENT queue in the controlvm | |
1367 | * channel | |
1368 | * @msg: pointer to the retrieved message | |
1369 | * | |
1370 | * Return: true if a valid message was retrieved or false otherwise | |
12e364b9 | 1371 | */ |
f4c11551 | 1372 | static bool |
3ab47701 | 1373 | read_controlvm_event(struct controlvm_message *msg) |
12e364b9 | 1374 | { |
c3d9a224 | 1375 | if (visorchannel_signalremove(controlvm_channel, |
12e364b9 KC |
1376 | CONTROLVM_QUEUE_EVENT, msg)) { |
1377 | /* got a message */ | |
0aca7844 | 1378 | if (msg->hdr.flags.test_message == 1) |
f4c11551 JS |
1379 | return false; |
1380 | return true; | |
12e364b9 | 1381 | } |
f4c11551 | 1382 | return false; |
12e364b9 KC |
1383 | } |
1384 | ||
1385 | /* | |
ec17f452 | 1386 | * The general parahotplug flow works as follows. The visorchipset |
12e364b9 | 1387 | * driver receives a DEVICE_CHANGESTATE message from Command |
ec17f452 | 1388 | * specifying a physical device to enable or disable. The CONTROLVM |
12e364b9 KC |
1389 | * message handler calls parahotplug_process_message, which then adds |
1390 | * the message to a global list and kicks off a udev event which | |
1391 | * causes a user level script to enable or disable the specified | |
ec17f452 | 1392 | * device. The udev script then writes to |
12e364b9 KC |
1393 | * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write |
1394 | * to get called, at which point the appropriate CONTROLVM message is | |
1395 | * retrieved from the list and responded to. | |
1396 | */ | |
1397 | ||
1398 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
1399 | ||
ec17f452 DB |
1400 | /** |
1401 | * parahotplug_next_id() - generate unique int to match an outstanding CONTROLVM | |
1402 | * message with a udev script /proc response | |
1403 | * | |
1404 | * Return: a unique integer value | |
12e364b9 KC |
1405 | */ |
1406 | static int | |
1407 | parahotplug_next_id(void) | |
1408 | { | |
1409 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 1410 | |
12e364b9 KC |
1411 | return atomic_inc_return(&id); |
1412 | } | |
1413 | ||
ec17f452 DB |
1414 | /** |
1415 | * parahotplug_next_expiration() - returns the time (in jiffies) when a | |
1416 | * CONTROLVM message on the list should expire | |
1417 | * -- PARAHOTPLUG_TIMEOUT_MS in the future | |
1418 | * | |
1419 | * Return: expected expiration time (in jiffies) | |
12e364b9 KC |
1420 | */ |
1421 | static unsigned long | |
1422 | parahotplug_next_expiration(void) | |
1423 | { | |
2cc1a1b3 | 1424 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
1425 | } |
1426 | ||
ec17f452 DB |
1427 | /** |
1428 | * parahotplug_request_create() - create a parahotplug_request, which is | |
1429 | * basically a wrapper for a CONTROLVM_MESSAGE | |
1430 | * that we can stick on a list | |
1431 | * @msg: the message to insert in the request | |
1432 | * | |
1433 | * Return: the request containing the provided message | |
12e364b9 KC |
1434 | */ |
1435 | static struct parahotplug_request * | |
3ab47701 | 1436 | parahotplug_request_create(struct controlvm_message *msg) |
12e364b9 | 1437 | { |
ea0dcfcf QL |
1438 | struct parahotplug_request *req; |
1439 | ||
6a55e3c3 | 1440 | req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY); |
38f736e9 | 1441 | if (!req) |
12e364b9 KC |
1442 | return NULL; |
1443 | ||
1444 | req->id = parahotplug_next_id(); | |
1445 | req->expiration = parahotplug_next_expiration(); | |
1446 | req->msg = *msg; | |
1447 | ||
1448 | return req; | |
1449 | } | |
1450 | ||
ec17f452 DB |
1451 | /** |
1452 | * parahotplug_request_destroy() - free a parahotplug_request | |
1453 | * @req: the request to deallocate | |
12e364b9 KC |
1454 | */ |
1455 | static void | |
1456 | parahotplug_request_destroy(struct parahotplug_request *req) | |
1457 | { | |
1458 | kfree(req); | |
1459 | } | |
1460 | ||
ec17f452 DB |
1461 | /** |
1462 | * parahotplug_request_kickoff() - initiate parahotplug request | |
1463 | * @req: the request to initiate | |
1464 | * | |
1465 | * Cause uevent to run the user level script to do the disable/enable specified | |
1466 | * in the parahotplug_request. | |
12e364b9 KC |
1467 | */ |
1468 | static void | |
1469 | parahotplug_request_kickoff(struct parahotplug_request *req) | |
1470 | { | |
2ea5117b | 1471 | struct controlvm_message_packet *cmd = &req->msg.cmd; |
12e364b9 KC |
1472 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], |
1473 | env_func[40]; | |
1474 | char *envp[] = { | |
1475 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1476 | }; | |
1477 | ||
1478 | sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); | |
1479 | sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); | |
1480 | sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", | |
2ea5117b | 1481 | cmd->device_change_state.state.active); |
12e364b9 | 1482 | sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", |
2ea5117b | 1483 | cmd->device_change_state.bus_no); |
12e364b9 | 1484 | sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", |
2ea5117b | 1485 | cmd->device_change_state.dev_no >> 3); |
12e364b9 | 1486 | sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", |
2ea5117b | 1487 | cmd->device_change_state.dev_no & 0x7); |
12e364b9 | 1488 | |
eb34e877 | 1489 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1490 | envp); |
1491 | } | |
1492 | ||
ec17f452 DB |
1493 | /** |
1494 | * parahotplug_process_list() - remove any request from the list that's been on | |
1495 | * there too long and respond with an error | |
12e364b9 KC |
1496 | */ |
1497 | static void | |
1498 | parahotplug_process_list(void) | |
1499 | { | |
e82ba62e JS |
1500 | struct list_head *pos; |
1501 | struct list_head *tmp; | |
12e364b9 | 1502 | |
ddf5de53 | 1503 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 | 1504 | |
ddf5de53 | 1505 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1506 | struct parahotplug_request *req = |
1507 | list_entry(pos, struct parahotplug_request, list); | |
55b33413 BR |
1508 | |
1509 | if (!time_after_eq(jiffies, req->expiration)) | |
1510 | continue; | |
1511 | ||
1512 | list_del(pos); | |
1513 | if (req->msg.hdr.flags.response_expected) | |
1514 | controlvm_respond_physdev_changestate( | |
1515 | &req->msg.hdr, | |
1516 | CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, | |
1517 | req->msg.cmd.device_change_state.state); | |
1518 | parahotplug_request_destroy(req); | |
12e364b9 KC |
1519 | } |
1520 | ||
ddf5de53 | 1521 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1522 | } |
1523 | ||
ec17f452 DB |
1524 | /** |
1525 | * parahotplug_request_complete() - mark request as complete | |
1526 | * @id: the id of the request | |
1527 | * @active: indicates whether the request is assigned to active partition | |
1528 | * | |
12e364b9 | 1529 | * Called from the /proc handler, which means the user script has |
ec17f452 | 1530 | * finished the enable/disable. Find the matching identifier, and |
12e364b9 | 1531 | * respond to the CONTROLVM message with success. |
ec17f452 DB |
1532 | * |
1533 | * Return: 0 on success or -EINVAL on failure | |
12e364b9 KC |
1534 | */ |
1535 | static int | |
b06bdf7d | 1536 | parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1537 | { |
e82ba62e JS |
1538 | struct list_head *pos; |
1539 | struct list_head *tmp; | |
12e364b9 | 1540 | |
ddf5de53 | 1541 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1542 | |
1543 | /* Look for a request matching "id". */ | |
ddf5de53 | 1544 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1545 | struct parahotplug_request *req = |
1546 | list_entry(pos, struct parahotplug_request, list); | |
1547 | if (req->id == id) { | |
ec17f452 DB |
1548 | /* |
1549 | * Found a match. Remove it from the list and | |
12e364b9 KC |
1550 | * respond. |
1551 | */ | |
1552 | list_del(pos); | |
ddf5de53 | 1553 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1554 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1555 | if (req->msg.hdr.flags.response_expected) |
12e364b9 KC |
1556 | controlvm_respond_physdev_changestate( |
1557 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
2ea5117b | 1558 | req->msg.cmd.device_change_state.state); |
12e364b9 KC |
1559 | parahotplug_request_destroy(req); |
1560 | return 0; | |
1561 | } | |
1562 | } | |
1563 | ||
ddf5de53 | 1564 | spin_unlock(¶hotplug_request_list_lock); |
119296ea | 1565 | return -EINVAL; |
12e364b9 KC |
1566 | } |
1567 | ||
ec17f452 DB |
1568 | /** |
1569 | * parahotplug_process_message() - enables or disables a PCI device by kicking | |
1570 | * off a udev script | |
1571 | * @inmsg: the message indicating whether to enable or disable | |
12e364b9 | 1572 | */ |
bd5b9b32 | 1573 | static void |
3ab47701 | 1574 | parahotplug_process_message(struct controlvm_message *inmsg) |
12e364b9 KC |
1575 | { |
1576 | struct parahotplug_request *req; | |
1577 | ||
1578 | req = parahotplug_request_create(inmsg); | |
1579 | ||
38f736e9 | 1580 | if (!req) |
12e364b9 | 1581 | return; |
12e364b9 | 1582 | |
2ea5117b | 1583 | if (inmsg->cmd.device_change_state.state.active) { |
ec17f452 DB |
1584 | /* |
1585 | * For enable messages, just respond with success | |
1586 | * right away. This is a bit of a hack, but there are | |
1587 | * issues with the early enable messages we get (with | |
1588 | * either the udev script not detecting that the device | |
1589 | * is up, or not getting called at all). Fortunately | |
1590 | * the messages that get lost don't matter anyway, as | |
1591 | * | |
1592 | * devices are automatically enabled at | |
1593 | * initialization. | |
12e364b9 KC |
1594 | */ |
1595 | parahotplug_request_kickoff(req); | |
a07d7c38 TS |
1596 | controlvm_respond_physdev_changestate |
1597 | (&inmsg->hdr, | |
1598 | CONTROLVM_RESP_SUCCESS, | |
1599 | inmsg->cmd.device_change_state.state); | |
12e364b9 KC |
1600 | parahotplug_request_destroy(req); |
1601 | } else { | |
ec17f452 DB |
1602 | /* |
1603 | * For disable messages, add the request to the | |
1604 | * request list before kicking off the udev script. It | |
1605 | * won't get responded to until the script has | |
1606 | * indicated it's done. | |
1607 | */ | |
ddf5de53 BR |
1608 | spin_lock(¶hotplug_request_list_lock); |
1609 | list_add_tail(&req->list, ¶hotplug_request_list); | |
1610 | spin_unlock(¶hotplug_request_list_lock); | |
12e364b9 KC |
1611 | |
1612 | parahotplug_request_kickoff(req); | |
1613 | } | |
1614 | } | |
1615 | ||
ec17f452 DB |
1616 | /** |
1617 | * handle_command() - process a controlvm message | |
1618 | * @inmsg: the message to process | |
1619 | * @channel_addr: address of the controlvm channel | |
1620 | * | |
1621 | * Return: | |
779d0752 | 1622 | * false - this function will return false only in the case where the |
12e364b9 KC |
1623 | * controlvm message was NOT processed, but processing must be |
1624 | * retried before reading the next controlvm message; a | |
1625 | * scenario where this can occur is when we need to throttle | |
1626 | * the allocation of memory in which to copy out controlvm | |
1627 | * payload data | |
f4c11551 | 1628 | * true - processing of the controlvm message completed, |
ec17f452 | 1629 | * either successfully or with an error |
12e364b9 | 1630 | */ |
f4c11551 | 1631 | static bool |
d5b3f1dc | 1632 | handle_command(struct controlvm_message inmsg, u64 channel_addr) |
12e364b9 | 1633 | { |
2ea5117b | 1634 | struct controlvm_message_packet *cmd = &inmsg.cmd; |
e82ba62e JS |
1635 | u64 parm_addr; |
1636 | u32 parm_bytes; | |
317d9614 | 1637 | struct parser_context *parser_ctx = NULL; |
e82ba62e | 1638 | bool local_addr; |
3ab47701 | 1639 | struct controlvm_message ackmsg; |
12e364b9 KC |
1640 | |
1641 | /* create parsing context if necessary */ | |
818352a8 | 1642 | local_addr = (inmsg.hdr.flags.test_message == 1); |
0aca7844 | 1643 | if (channel_addr == 0) |
f4c11551 | 1644 | return true; |
818352a8 BR |
1645 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; |
1646 | parm_bytes = inmsg.hdr.payload_bytes; | |
12e364b9 | 1647 | |
ec17f452 DB |
1648 | /* |
1649 | * Parameter and channel addresses within test messages actually lie | |
1650 | * within our OS-controlled memory. We need to know that, because it | |
12e364b9 KC |
1651 | * makes a difference in how we compute the virtual address. |
1652 | */ | |
ebec8967 | 1653 | if (parm_addr && parm_bytes) { |
f4c11551 | 1654 | bool retry = false; |
26eb2c0c | 1655 | |
12e364b9 | 1656 | parser_ctx = |
818352a8 BR |
1657 | parser_init_byte_stream(parm_addr, parm_bytes, |
1658 | local_addr, &retry); | |
1b08872e | 1659 | if (!parser_ctx && retry) |
f4c11551 | 1660 | return false; |
12e364b9 KC |
1661 | } |
1662 | ||
818352a8 | 1663 | if (!local_addr) { |
12e364b9 KC |
1664 | controlvm_init_response(&ackmsg, &inmsg.hdr, |
1665 | CONTROLVM_RESP_SUCCESS); | |
c3d9a224 BR |
1666 | if (controlvm_channel) |
1667 | visorchannel_signalinsert(controlvm_channel, | |
1b08872e BR |
1668 | CONTROLVM_QUEUE_ACK, |
1669 | &ackmsg); | |
12e364b9 | 1670 | } |
98d7b594 | 1671 | switch (inmsg.hdr.id) { |
12e364b9 | 1672 | case CONTROLVM_CHIPSET_INIT: |
12e364b9 KC |
1673 | chipset_init(&inmsg); |
1674 | break; | |
1675 | case CONTROLVM_BUS_CREATE: | |
12e364b9 KC |
1676 | bus_create(&inmsg); |
1677 | break; | |
1678 | case CONTROLVM_BUS_DESTROY: | |
12e364b9 KC |
1679 | bus_destroy(&inmsg); |
1680 | break; | |
1681 | case CONTROLVM_BUS_CONFIGURE: | |
12e364b9 KC |
1682 | bus_configure(&inmsg, parser_ctx); |
1683 | break; | |
1684 | case CONTROLVM_DEVICE_CREATE: | |
12e364b9 KC |
1685 | my_device_create(&inmsg); |
1686 | break; | |
1687 | case CONTROLVM_DEVICE_CHANGESTATE: | |
2ea5117b | 1688 | if (cmd->device_change_state.flags.phys_device) { |
12e364b9 KC |
1689 | parahotplug_process_message(&inmsg); |
1690 | } else { | |
ec17f452 DB |
1691 | /* |
1692 | * save the hdr and cmd structures for later use | |
1693 | * when sending back the response to Command | |
1694 | */ | |
12e364b9 | 1695 | my_device_changestate(&inmsg); |
12e364b9 KC |
1696 | break; |
1697 | } | |
1698 | break; | |
1699 | case CONTROLVM_DEVICE_DESTROY: | |
12e364b9 KC |
1700 | my_device_destroy(&inmsg); |
1701 | break; | |
1702 | case CONTROLVM_DEVICE_CONFIGURE: | |
12e364b9 | 1703 | /* no op for now, just send a respond that we passed */ |
98d7b594 | 1704 | if (inmsg.hdr.flags.response_expected) |
12e364b9 KC |
1705 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); |
1706 | break; | |
1707 | case CONTROLVM_CHIPSET_READY: | |
12e364b9 KC |
1708 | chipset_ready(&inmsg.hdr); |
1709 | break; | |
1710 | case CONTROLVM_CHIPSET_SELFTEST: | |
12e364b9 KC |
1711 | chipset_selftest(&inmsg.hdr); |
1712 | break; | |
1713 | case CONTROLVM_CHIPSET_STOP: | |
12e364b9 KC |
1714 | chipset_notready(&inmsg.hdr); |
1715 | break; | |
1716 | default: | |
98d7b594 | 1717 | if (inmsg.hdr.flags.response_expected) |
a07d7c38 TS |
1718 | controlvm_respond |
1719 | (&inmsg.hdr, | |
1720 | -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); | |
12e364b9 KC |
1721 | break; |
1722 | } | |
1723 | ||
38f736e9 | 1724 | if (parser_ctx) { |
12e364b9 KC |
1725 | parser_done(parser_ctx); |
1726 | parser_ctx = NULL; | |
1727 | } | |
f4c11551 | 1728 | return true; |
12e364b9 KC |
1729 | } |
1730 | ||
5f3a7e36 DK |
1731 | static inline unsigned int |
1732 | issue_vmcall_io_controlvm_addr(u64 *control_addr, u32 *control_bytes) | |
1733 | { | |
1734 | struct vmcall_io_controlvm_addr_params params; | |
1735 | int result = VMCALL_SUCCESS; | |
1736 | u64 physaddr; | |
1737 | ||
1738 | physaddr = virt_to_phys(¶ms); | |
1739 | ISSUE_IO_VMCALL(VMCALL_IO_CONTROLVM_ADDR, physaddr, result); | |
1740 | if (VMCALL_SUCCESSFUL(result)) { | |
1741 | *control_addr = params.address; | |
1742 | *control_bytes = params.channel_bytes; | |
1743 | } | |
1744 | return result; | |
1745 | } | |
1746 | ||
d5b3f1dc | 1747 | static u64 controlvm_get_channel_address(void) |
524b0b63 | 1748 | { |
5fc0229a | 1749 | u64 addr = 0; |
b3c55b13 | 1750 | u32 size = 0; |
524b0b63 | 1751 | |
0aca7844 | 1752 | if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) |
524b0b63 | 1753 | return 0; |
0aca7844 | 1754 | |
524b0b63 BR |
1755 | return addr; |
1756 | } | |
1757 | ||
12e364b9 KC |
1758 | static void |
1759 | controlvm_periodic_work(struct work_struct *work) | |
1760 | { | |
3ab47701 | 1761 | struct controlvm_message inmsg; |
f4c11551 JS |
1762 | bool got_command = false; |
1763 | bool handle_command_failed = false; | |
12e364b9 | 1764 | |
c3d9a224 | 1765 | while (visorchannel_signalremove(controlvm_channel, |
8a1182eb | 1766 | CONTROLVM_QUEUE_RESPONSE, |
c3d9a224 BR |
1767 | &inmsg)) |
1768 | ; | |
1c1ed292 | 1769 | if (!got_command) { |
7166ed19 | 1770 | if (controlvm_pending_msg_valid) { |
ec17f452 DB |
1771 | /* |
1772 | * we throttled processing of a prior | |
1773 | * msg, so try to process it again | |
1774 | * rather than reading a new one | |
1775 | */ | |
7166ed19 | 1776 | inmsg = controlvm_pending_msg; |
f4c11551 | 1777 | controlvm_pending_msg_valid = false; |
1c1ed292 | 1778 | got_command = true; |
75c1f8b7 | 1779 | } else { |
1c1ed292 | 1780 | got_command = read_controlvm_event(&inmsg); |
75c1f8b7 | 1781 | } |
8a1182eb | 1782 | } |
12e364b9 | 1783 | |
f4c11551 | 1784 | handle_command_failed = false; |
1c1ed292 | 1785 | while (got_command && (!handle_command_failed)) { |
b53e0e93 | 1786 | most_recent_message_jiffies = jiffies; |
8a1182eb BR |
1787 | if (handle_command(inmsg, |
1788 | visorchannel_get_physaddr | |
c3d9a224 | 1789 | (controlvm_channel))) |
1c1ed292 | 1790 | got_command = read_controlvm_event(&inmsg); |
8a1182eb | 1791 | else { |
ec17f452 DB |
1792 | /* |
1793 | * this is a scenario where throttling | |
1794 | * is required, but probably NOT an | |
1795 | * error...; we stash the current | |
1796 | * controlvm msg so we will attempt to | |
1797 | * reprocess it on our next loop | |
1798 | */ | |
f4c11551 | 1799 | handle_command_failed = true; |
7166ed19 | 1800 | controlvm_pending_msg = inmsg; |
f4c11551 | 1801 | controlvm_pending_msg_valid = true; |
12e364b9 KC |
1802 | } |
1803 | } | |
1804 | ||
1805 | /* parahotplug_worker */ | |
1806 | parahotplug_process_list(); | |
1807 | ||
12e364b9 | 1808 | if (time_after(jiffies, |
b53e0e93 | 1809 | most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { |
ec17f452 DB |
1810 | /* |
1811 | * it's been longer than MIN_IDLE_SECONDS since we | |
1812 | * processed our last controlvm message; slow down the | |
1813 | * polling | |
1814 | */ | |
911e213e BR |
1815 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) |
1816 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
12e364b9 | 1817 | } else { |
911e213e BR |
1818 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) |
1819 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
12e364b9 KC |
1820 | } |
1821 | ||
0bde2979 | 1822 | schedule_delayed_work(&periodic_controlvm_work, poll_jiffies); |
12e364b9 KC |
1823 | } |
1824 | ||
1825 | static void | |
1826 | setup_crash_devices_work_queue(struct work_struct *work) | |
1827 | { | |
e6bdb904 BR |
1828 | struct controlvm_message local_crash_bus_msg; |
1829 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 1830 | struct controlvm_message msg; |
e6bdb904 BR |
1831 | u32 local_crash_msg_offset; |
1832 | u16 local_crash_msg_count; | |
12e364b9 | 1833 | |
12e364b9 KC |
1834 | POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); |
1835 | ||
1836 | /* send init chipset msg */ | |
98d7b594 | 1837 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
1838 | msg.cmd.init_chipset.bus_count = 23; |
1839 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
1840 | |
1841 | chipset_init(&msg); | |
1842 | ||
12e364b9 | 1843 | /* get saved message count */ |
c3d9a224 | 1844 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1845 | offsetof(struct spar_controlvm_channel_protocol, |
1846 | saved_crash_message_count), | |
e6bdb904 | 1847 | &local_crash_msg_count, sizeof(u16)) < 0) { |
12e364b9 KC |
1848 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
1849 | POSTCODE_SEVERITY_ERR); | |
1850 | return; | |
1851 | } | |
1852 | ||
e6bdb904 | 1853 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
12e364b9 | 1854 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
e6bdb904 | 1855 | local_crash_msg_count, |
12e364b9 KC |
1856 | POSTCODE_SEVERITY_ERR); |
1857 | return; | |
1858 | } | |
1859 | ||
1860 | /* get saved crash message offset */ | |
c3d9a224 | 1861 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1862 | offsetof(struct spar_controlvm_channel_protocol, |
1863 | saved_crash_message_offset), | |
e6bdb904 | 1864 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
12e364b9 KC |
1865 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
1866 | POSTCODE_SEVERITY_ERR); | |
1867 | return; | |
1868 | } | |
1869 | ||
1870 | /* read create device message for storage bus offset */ | |
c3d9a224 | 1871 | if (visorchannel_read(controlvm_channel, |
e6bdb904 BR |
1872 | local_crash_msg_offset, |
1873 | &local_crash_bus_msg, | |
3ab47701 | 1874 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
1875 | POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, |
1876 | POSTCODE_SEVERITY_ERR); | |
1877 | return; | |
1878 | } | |
1879 | ||
1880 | /* read create device message for storage device */ | |
c3d9a224 | 1881 | if (visorchannel_read(controlvm_channel, |
e6bdb904 | 1882 | local_crash_msg_offset + |
3ab47701 | 1883 | sizeof(struct controlvm_message), |
e6bdb904 | 1884 | &local_crash_dev_msg, |
3ab47701 | 1885 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
1886 | POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, |
1887 | POSTCODE_SEVERITY_ERR); | |
1888 | return; | |
1889 | } | |
1890 | ||
1891 | /* reuse IOVM create bus message */ | |
ebec8967 | 1892 | if (local_crash_bus_msg.cmd.create_bus.channel_addr) { |
e6bdb904 | 1893 | bus_create(&local_crash_bus_msg); |
75c1f8b7 | 1894 | } else { |
12e364b9 KC |
1895 | POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, |
1896 | POSTCODE_SEVERITY_ERR); | |
1897 | return; | |
1898 | } | |
1899 | ||
1900 | /* reuse create device message for storage device */ | |
ebec8967 | 1901 | if (local_crash_dev_msg.cmd.create_device.channel_addr) { |
e6bdb904 | 1902 | my_device_create(&local_crash_dev_msg); |
75c1f8b7 | 1903 | } else { |
12e364b9 KC |
1904 | POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, |
1905 | POSTCODE_SEVERITY_ERR); | |
1906 | return; | |
1907 | } | |
12e364b9 | 1908 | POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); |
12e364b9 KC |
1909 | } |
1910 | ||
87241ab8 | 1911 | void |
d32517e3 | 1912 | bus_create_response(struct visor_device *bus_info, int response) |
12e364b9 | 1913 | { |
4b4fd43a | 1914 | if (response >= 0) |
0274b5ae | 1915 | bus_info->state.created = 1; |
0274b5ae DZ |
1916 | |
1917 | bus_responder(CONTROLVM_BUS_CREATE, bus_info->pending_msg_hdr, | |
1918 | response); | |
1919 | ||
1920 | kfree(bus_info->pending_msg_hdr); | |
1921 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1922 | } |
1923 | ||
87241ab8 | 1924 | void |
d32517e3 | 1925 | bus_destroy_response(struct visor_device *bus_info, int response) |
12e364b9 | 1926 | { |
0274b5ae DZ |
1927 | bus_responder(CONTROLVM_BUS_DESTROY, bus_info->pending_msg_hdr, |
1928 | response); | |
1929 | ||
1930 | kfree(bus_info->pending_msg_hdr); | |
1931 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1932 | } |
1933 | ||
87241ab8 | 1934 | void |
a298bc0b | 1935 | device_create_response(struct visor_device *dev_info, int response) |
12e364b9 | 1936 | { |
0274b5ae DZ |
1937 | if (response >= 0) |
1938 | dev_info->state.created = 1; | |
1939 | ||
1940 | device_responder(CONTROLVM_DEVICE_CREATE, dev_info->pending_msg_hdr, | |
1941 | response); | |
1942 | ||
1943 | kfree(dev_info->pending_msg_hdr); | |
addce19f | 1944 | dev_info->pending_msg_hdr = NULL; |
12e364b9 KC |
1945 | } |
1946 | ||
87241ab8 | 1947 | void |
a298bc0b | 1948 | device_destroy_response(struct visor_device *dev_info, int response) |
12e364b9 | 1949 | { |
0274b5ae DZ |
1950 | device_responder(CONTROLVM_DEVICE_DESTROY, dev_info->pending_msg_hdr, |
1951 | response); | |
1952 | ||
1953 | kfree(dev_info->pending_msg_hdr); | |
1954 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1955 | } |
1956 | ||
87241ab8 | 1957 | void |
ea3a5aaf DB |
1958 | device_pause_response(struct visor_device *dev_info, |
1959 | int response) | |
12e364b9 | 1960 | { |
12e364b9 | 1961 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
b4b598fd | 1962 | dev_info, response, |
bd0d2dcc | 1963 | segment_state_standby); |
0274b5ae DZ |
1964 | |
1965 | kfree(dev_info->pending_msg_hdr); | |
1966 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 | 1967 | } |
12e364b9 | 1968 | |
87241ab8 | 1969 | void |
a298bc0b | 1970 | device_resume_response(struct visor_device *dev_info, int response) |
12e364b9 KC |
1971 | { |
1972 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
b4b598fd | 1973 | dev_info, response, |
bd0d2dcc | 1974 | segment_state_running); |
0274b5ae DZ |
1975 | |
1976 | kfree(dev_info->pending_msg_hdr); | |
1977 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1978 | } |
1979 | ||
ec17f452 DB |
1980 | /** |
1981 | * devicedisabled_store() - disables the hotplug device | |
1982 | * @dev: sysfs interface variable not utilized in this function | |
1983 | * @attr: sysfs interface variable not utilized in this function | |
1984 | * @buf: buffer containing the device id | |
1985 | * @count: the size of the buffer | |
1986 | * | |
1987 | * The parahotplug/devicedisabled interface gets called by our support script | |
e56fa7cd BR |
1988 | * when an SR-IOV device has been shut down. The ID is passed to the script |
1989 | * and then passed back when the device has been removed. | |
ec17f452 DB |
1990 | * |
1991 | * Return: the size of the buffer for success or negative for error | |
e56fa7cd BR |
1992 | */ |
1993 | static ssize_t devicedisabled_store(struct device *dev, | |
8e76e695 BR |
1994 | struct device_attribute *attr, |
1995 | const char *buf, size_t count) | |
e56fa7cd | 1996 | { |
94217363 | 1997 | unsigned int id; |
80224f06 | 1998 | int err; |
e56fa7cd | 1999 | |
ebec8967 | 2000 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2001 | return -EINVAL; |
2002 | ||
80224f06 EA |
2003 | err = parahotplug_request_complete(id, 0); |
2004 | if (err < 0) | |
2005 | return err; | |
e56fa7cd BR |
2006 | return count; |
2007 | } | |
2008 | ||
ec17f452 DB |
2009 | /** |
2010 | * deviceenabled_store() - enables the hotplug device | |
2011 | * @dev: sysfs interface variable not utilized in this function | |
2012 | * @attr: sysfs interface variable not utilized in this function | |
2013 | * @buf: buffer containing the device id | |
2014 | * @count: the size of the buffer | |
2015 | * | |
2016 | * The parahotplug/deviceenabled interface gets called by our support script | |
e56fa7cd BR |
2017 | * when an SR-IOV device has been recovered. The ID is passed to the script |
2018 | * and then passed back when the device has been brought back up. | |
ec17f452 DB |
2019 | * |
2020 | * Return: the size of the buffer for success or negative for error | |
e56fa7cd BR |
2021 | */ |
2022 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
2023 | struct device_attribute *attr, |
2024 | const char *buf, size_t count) | |
e56fa7cd | 2025 | { |
94217363 | 2026 | unsigned int id; |
e56fa7cd | 2027 | |
ebec8967 | 2028 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2029 | return -EINVAL; |
2030 | ||
2031 | parahotplug_request_complete(id, 1); | |
2032 | return count; | |
2033 | } | |
2034 | ||
e3420ed6 EA |
2035 | static int |
2036 | visorchipset_mmap(struct file *file, struct vm_area_struct *vma) | |
2037 | { | |
2038 | unsigned long physaddr = 0; | |
2039 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
780fcad3 | 2040 | u64 addr = 0; |
e3420ed6 EA |
2041 | |
2042 | /* sv_enable_dfp(); */ | |
2043 | if (offset & (PAGE_SIZE - 1)) | |
2044 | return -ENXIO; /* need aligned offsets */ | |
2045 | ||
2046 | switch (offset) { | |
2047 | case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: | |
2048 | vma->vm_flags |= VM_IO; | |
2049 | if (!*file_controlvm_channel) | |
2050 | return -ENXIO; | |
2051 | ||
a07d7c38 TS |
2052 | visorchannel_read |
2053 | (*file_controlvm_channel, | |
2054 | offsetof(struct spar_controlvm_channel_protocol, | |
2055 | gp_control_channel), | |
2056 | &addr, sizeof(addr)); | |
e3420ed6 EA |
2057 | if (!addr) |
2058 | return -ENXIO; | |
2059 | ||
2060 | physaddr = (unsigned long)addr; | |
2061 | if (remap_pfn_range(vma, vma->vm_start, | |
2062 | physaddr >> PAGE_SHIFT, | |
2063 | vma->vm_end - vma->vm_start, | |
2064 | /*pgprot_noncached */ | |
2065 | (vma->vm_page_prot))) { | |
2066 | return -EAGAIN; | |
2067 | } | |
2068 | break; | |
2069 | default: | |
2070 | return -ENXIO; | |
2071 | } | |
2072 | return 0; | |
2073 | } | |
2074 | ||
5f3a7e36 DK |
2075 | static inline s64 issue_vmcall_query_guest_virtual_time_offset(void) |
2076 | { | |
2077 | u64 result = VMCALL_SUCCESS; | |
2078 | u64 physaddr = 0; | |
2079 | ||
2080 | ISSUE_IO_VMCALL(VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET, physaddr, | |
2081 | result); | |
2082 | return result; | |
2083 | } | |
2084 | ||
2085 | static inline int issue_vmcall_update_physical_time(u64 adjustment) | |
2086 | { | |
2087 | int result = VMCALL_SUCCESS; | |
2088 | ||
2089 | ISSUE_IO_VMCALL(VMCALL_UPDATE_PHYSICAL_TIME, adjustment, result); | |
2090 | return result; | |
2091 | } | |
2092 | ||
e3420ed6 EA |
2093 | static long visorchipset_ioctl(struct file *file, unsigned int cmd, |
2094 | unsigned long arg) | |
2095 | { | |
2500276e | 2096 | u64 adjustment; |
e3420ed6 EA |
2097 | s64 vrtc_offset; |
2098 | ||
2099 | switch (cmd) { | |
2100 | case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: | |
2101 | /* get the physical rtc offset */ | |
2102 | vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); | |
2103 | if (copy_to_user((void __user *)arg, &vrtc_offset, | |
2104 | sizeof(vrtc_offset))) { | |
2105 | return -EFAULT; | |
2106 | } | |
d5b3f1dc | 2107 | return 0; |
e3420ed6 EA |
2108 | case VMCALL_UPDATE_PHYSICAL_TIME: |
2109 | if (copy_from_user(&adjustment, (void __user *)arg, | |
2110 | sizeof(adjustment))) { | |
2111 | return -EFAULT; | |
2112 | } | |
2113 | return issue_vmcall_update_physical_time(adjustment); | |
2114 | default: | |
2115 | return -EFAULT; | |
2116 | } | |
2117 | } | |
2118 | ||
2119 | static const struct file_operations visorchipset_fops = { | |
2120 | .owner = THIS_MODULE, | |
2121 | .open = visorchipset_open, | |
2122 | .read = NULL, | |
2123 | .write = NULL, | |
2124 | .unlocked_ioctl = visorchipset_ioctl, | |
2125 | .release = visorchipset_release, | |
2126 | .mmap = visorchipset_mmap, | |
2127 | }; | |
2128 | ||
0f570fc0 | 2129 | static int |
e3420ed6 EA |
2130 | visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) |
2131 | { | |
2132 | int rc = 0; | |
2133 | ||
2134 | file_controlvm_channel = controlvm_channel; | |
2135 | cdev_init(&file_cdev, &visorchipset_fops); | |
2136 | file_cdev.owner = THIS_MODULE; | |
2137 | if (MAJOR(major_dev) == 0) { | |
46168810 | 2138 | rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset"); |
e3420ed6 EA |
2139 | /* dynamic major device number registration required */ |
2140 | if (rc < 0) | |
2141 | return rc; | |
2142 | } else { | |
2143 | /* static major device number registration required */ | |
46168810 | 2144 | rc = register_chrdev_region(major_dev, 1, "visorchipset"); |
e3420ed6 EA |
2145 | if (rc < 0) |
2146 | return rc; | |
2147 | } | |
2148 | rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); | |
2149 | if (rc < 0) { | |
2150 | unregister_chrdev_region(major_dev, 1); | |
2151 | return rc; | |
2152 | } | |
2153 | return 0; | |
2154 | } | |
2155 | ||
1366a3db DK |
2156 | static void |
2157 | visorchipset_file_cleanup(dev_t major_dev) | |
2158 | { | |
2159 | if (file_cdev.ops) | |
2160 | cdev_del(&file_cdev); | |
2161 | file_cdev.ops = NULL; | |
2162 | unregister_chrdev_region(major_dev, 1); | |
2163 | } | |
2164 | ||
55c67dca PB |
2165 | static int |
2166 | visorchipset_init(struct acpi_device *acpi_device) | |
12e364b9 | 2167 | { |
1366a3db | 2168 | int err = -ENODEV; |
d5b3f1dc | 2169 | u64 addr; |
d3368a58 JS |
2170 | uuid_le uuid = SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID; |
2171 | ||
2172 | addr = controlvm_get_channel_address(); | |
2173 | if (!addr) | |
1366a3db | 2174 | goto error; |
12e364b9 | 2175 | |
84982fbf | 2176 | memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); |
12e364b9 | 2177 | |
c732623b | 2178 | controlvm_channel = visorchannel_create_with_lock(addr, 0, |
d3368a58 | 2179 | GFP_KERNEL, uuid); |
c732623b | 2180 | if (!controlvm_channel) |
1366a3db DK |
2181 | goto error; |
2182 | ||
d3368a58 JS |
2183 | if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( |
2184 | visorchannel_get_header(controlvm_channel))) { | |
2185 | initialize_controlvm_payload(); | |
8a1182eb | 2186 | } else { |
1366a3db | 2187 | goto error_destroy_channel; |
8a1182eb BR |
2188 | } |
2189 | ||
5aa8ae57 | 2190 | major_dev = MKDEV(visorchipset_major, 0); |
1366a3db DK |
2191 | err = visorchipset_file_init(major_dev, &controlvm_channel); |
2192 | if (err < 0) | |
2193 | goto error_destroy_payload; | |
12e364b9 | 2194 | |
4da3336c DK |
2195 | /* if booting in a crash kernel */ |
2196 | if (is_kdump_kernel()) | |
2197 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2198 | setup_crash_devices_work_queue); | |
2199 | else | |
2200 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2201 | controlvm_periodic_work); | |
4da3336c | 2202 | |
4da3336c DK |
2203 | most_recent_message_jiffies = jiffies; |
2204 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
0bde2979 | 2205 | schedule_delayed_work(&periodic_controlvm_work, poll_jiffies); |
12e364b9 | 2206 | |
eb34e877 BR |
2207 | visorchipset_platform_device.dev.devt = major_dev; |
2208 | if (platform_device_register(&visorchipset_platform_device) < 0) { | |
4cb005a9 | 2209 | POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); |
1366a3db DK |
2210 | err = -ENODEV; |
2211 | goto error_cancel_work; | |
4cb005a9 | 2212 | } |
12e364b9 | 2213 | POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); |
c79b28f7 | 2214 | |
1366a3db DK |
2215 | err = visorbus_init(); |
2216 | if (err < 0) | |
2217 | goto error_unregister; | |
12e364b9 | 2218 | |
1366a3db DK |
2219 | return 0; |
2220 | ||
2221 | error_unregister: | |
2222 | platform_device_unregister(&visorchipset_platform_device); | |
2223 | ||
2224 | error_cancel_work: | |
2225 | cancel_delayed_work_sync(&periodic_controlvm_work); | |
2226 | visorchipset_file_cleanup(major_dev); | |
2227 | ||
2228 | error_destroy_payload: | |
2229 | destroy_controlvm_payload_info(&controlvm_payload_info); | |
2230 | ||
2231 | error_destroy_channel: | |
2232 | visorchannel_destroy(controlvm_channel); | |
2233 | ||
2234 | error: | |
2235 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, err, POSTCODE_SEVERITY_ERR); | |
2236 | return err; | |
e3420ed6 EA |
2237 | } |
2238 | ||
55c67dca PB |
2239 | static int |
2240 | visorchipset_exit(struct acpi_device *acpi_device) | |
12e364b9 | 2241 | { |
12e364b9 KC |
2242 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2243 | ||
c79b28f7 PB |
2244 | visorbus_exit(); |
2245 | ||
0bde2979 | 2246 | cancel_delayed_work_sync(&periodic_controlvm_work); |
4da3336c | 2247 | destroy_controlvm_payload_info(&controlvm_payload_info); |
1783319f | 2248 | |
c3d9a224 | 2249 | visorchannel_destroy(controlvm_channel); |
8a1182eb | 2250 | |
addceb12 | 2251 | visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); |
04dacacc | 2252 | platform_device_unregister(&visorchipset_platform_device); |
12e364b9 | 2253 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
55c67dca PB |
2254 | |
2255 | return 0; | |
2256 | } | |
2257 | ||
2258 | static const struct acpi_device_id unisys_device_ids[] = { | |
2259 | {"PNP0A07", 0}, | |
2260 | {"", 0}, | |
2261 | }; | |
55c67dca PB |
2262 | |
2263 | static struct acpi_driver unisys_acpi_driver = { | |
2264 | .name = "unisys_acpi", | |
2265 | .class = "unisys_acpi_class", | |
2266 | .owner = THIS_MODULE, | |
2267 | .ids = unisys_device_ids, | |
2268 | .ops = { | |
2269 | .add = visorchipset_init, | |
2270 | .remove = visorchipset_exit, | |
2271 | }, | |
2272 | }; | |
1fc07f99 DK |
2273 | |
2274 | MODULE_DEVICE_TABLE(acpi, unisys_device_ids); | |
2275 | ||
d5b3f1dc EA |
2276 | static __init uint32_t visorutil_spar_detect(void) |
2277 | { | |
2278 | unsigned int eax, ebx, ecx, edx; | |
2279 | ||
0c9f3536 | 2280 | if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) { |
d5b3f1dc EA |
2281 | /* check the ID */ |
2282 | cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx); | |
2283 | return (ebx == UNISYS_SPAR_ID_EBX) && | |
2284 | (ecx == UNISYS_SPAR_ID_ECX) && | |
2285 | (edx == UNISYS_SPAR_ID_EDX); | |
2286 | } else { | |
2287 | return 0; | |
2288 | } | |
2289 | } | |
55c67dca PB |
2290 | |
2291 | static int init_unisys(void) | |
2292 | { | |
2293 | int result; | |
35e606de | 2294 | |
d5b3f1dc | 2295 | if (!visorutil_spar_detect()) |
55c67dca PB |
2296 | return -ENODEV; |
2297 | ||
2298 | result = acpi_bus_register_driver(&unisys_acpi_driver); | |
2299 | if (result) | |
2300 | return -ENODEV; | |
2301 | ||
2302 | pr_info("Unisys Visorchipset Driver Loaded.\n"); | |
2303 | return 0; | |
2304 | }; | |
2305 | ||
2306 | static void exit_unisys(void) | |
2307 | { | |
2308 | acpi_bus_unregister_driver(&unisys_acpi_driver); | |
12e364b9 KC |
2309 | } |
2310 | ||
12e364b9 | 2311 | module_param_named(major, visorchipset_major, int, S_IRUGO); |
b615d628 JS |
2312 | MODULE_PARM_DESC(visorchipset_major, |
2313 | "major device number to use for the device node"); | |
4da3336c | 2314 | module_param_named(visorbusregwait, visorchipset_visorbusregwait, int, S_IRUGO); |
80bee261 | 2315 | MODULE_PARM_DESC(visorchipset_visorbusregwait, |
12e364b9 | 2316 | "1 to have the module wait for the visor bus to register"); |
b615d628 | 2317 | |
55c67dca PB |
2318 | module_init(init_unisys); |
2319 | module_exit(exit_unisys); | |
12e364b9 KC |
2320 | |
2321 | MODULE_AUTHOR("Unisys"); | |
2322 | MODULE_LICENSE("GPL"); | |
2323 | MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " | |
2324 | VERSION); | |
2325 | MODULE_VERSION(VERSION); |