Commit | Line | Data |
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12e364b9 KC |
1 | /* visorchipset_main.c |
2 | * | |
6f14cc18 | 3 | * Copyright (C) 2010 - 2015 UNISYS CORPORATION |
12e364b9 KC |
4 | * All rights reserved. |
5 | * | |
6f14cc18 BR |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
12e364b9 KC |
9 | * |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
13 | * NON INFRINGEMENT. See the GNU General Public License for more | |
14 | * details. | |
15 | */ | |
16 | ||
55c67dca | 17 | #include <linux/acpi.h> |
c0a14641 | 18 | #include <linux/cdev.h> |
46168810 | 19 | #include <linux/ctype.h> |
e3420ed6 EA |
20 | #include <linux/fs.h> |
21 | #include <linux/mm.h> | |
12e364b9 KC |
22 | #include <linux/nls.h> |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/platform_device.h> | |
90addb02 | 25 | #include <linux/uuid.h> |
1ba00980 | 26 | #include <linux/crash_dump.h> |
12e364b9 | 27 | |
5f3a7e36 | 28 | #include "channel_guid.h" |
55c67dca PB |
29 | #include "controlvmchannel.h" |
30 | #include "controlvmcompletionstatus.h" | |
31 | #include "guestlinuxdebug.h" | |
32 | #include "periodic_work.h" | |
55c67dca PB |
33 | #include "version.h" |
34 | #include "visorbus.h" | |
35 | #include "visorbus_private.h" | |
5f3a7e36 | 36 | #include "vmcallinterface.h" |
55c67dca | 37 | |
12e364b9 | 38 | #define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c |
12e364b9 KC |
39 | |
40 | #define MAX_NAME_SIZE 128 | |
41 | #define MAX_IP_SIZE 50 | |
42 | #define MAXOUTSTANDINGCHANNELCOMMAND 256 | |
43 | #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 | |
44 | #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 | |
45 | ||
46168810 | 46 | #define MAX_CONTROLVM_PAYLOAD_BYTES (1024*128) |
2ee0deec PB |
47 | |
48 | #define VISORCHIPSET_MMAP_CONTROLCHANOFFSET 0x00000000 | |
49 | ||
d5b3f1dc EA |
50 | |
51 | #define UNISYS_SPAR_LEAF_ID 0x40000000 | |
52 | ||
53 | /* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ | |
54 | #define UNISYS_SPAR_ID_EBX 0x73696e55 | |
55 | #define UNISYS_SPAR_ID_ECX 0x70537379 | |
56 | #define UNISYS_SPAR_ID_EDX 0x34367261 | |
57 | ||
b615d628 JS |
58 | /* |
59 | * Module parameters | |
60 | */ | |
b615d628 | 61 | static int visorchipset_major; |
4da3336c | 62 | static int visorchipset_visorbusregwait = 1; /* default is on */ |
b615d628 | 63 | static int visorchipset_holdchipsetready; |
46168810 | 64 | static unsigned long controlvm_payload_bytes_buffered; |
b615d628 | 65 | |
e3420ed6 EA |
66 | static int |
67 | visorchipset_open(struct inode *inode, struct file *file) | |
68 | { | |
69 | unsigned minor_number = iminor(inode); | |
70 | ||
71 | if (minor_number) | |
72 | return -ENODEV; | |
73 | file->private_data = NULL; | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static int | |
78 | visorchipset_release(struct inode *inode, struct file *file) | |
79 | { | |
80 | return 0; | |
81 | } | |
82 | ||
12e364b9 KC |
83 | /* When the controlvm channel is idle for at least MIN_IDLE_SECONDS, |
84 | * we switch to slow polling mode. As soon as we get a controlvm | |
85 | * message, we switch back to fast polling mode. | |
86 | */ | |
87 | #define MIN_IDLE_SECONDS 10 | |
52063eca JS |
88 | static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
89 | static unsigned long most_recent_message_jiffies; /* when we got our last | |
bd5b9b32 | 90 | * controlvm message */ |
4da3336c | 91 | static int visorbusregistered; |
12e364b9 KC |
92 | |
93 | #define MAX_CHIPSET_EVENTS 2 | |
c242233e | 94 | static u8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 0 }; |
12e364b9 | 95 | |
46168810 EA |
96 | struct parser_context { |
97 | unsigned long allocbytes; | |
98 | unsigned long param_bytes; | |
99 | u8 *curr; | |
100 | unsigned long bytes_remaining; | |
101 | bool byte_stream; | |
102 | char data[0]; | |
103 | }; | |
104 | ||
9232d2d6 BR |
105 | static struct delayed_work periodic_controlvm_work; |
106 | static struct workqueue_struct *periodic_controlvm_workqueue; | |
8f1947ac | 107 | static DEFINE_SEMAPHORE(notifier_lock); |
12e364b9 | 108 | |
e3420ed6 EA |
109 | static struct cdev file_cdev; |
110 | static struct visorchannel **file_controlvm_channel; | |
da021f02 | 111 | static struct controlvm_message_header g_chipset_msg_hdr; |
4f44b72d | 112 | static struct controlvm_message_packet g_devicechangestate_packet; |
12e364b9 | 113 | |
1390b88c BR |
114 | static LIST_HEAD(bus_info_list); |
115 | static LIST_HEAD(dev_info_list); | |
12e364b9 | 116 | |
c3d9a224 | 117 | static struct visorchannel *controlvm_channel; |
12e364b9 | 118 | |
84982fbf | 119 | /* Manages the request payload in the controlvm channel */ |
c1f834eb | 120 | struct visor_controlvm_payload_info { |
3103dc03 | 121 | u8 *ptr; /* pointer to base address of payload pool */ |
5fc0229a | 122 | u64 offset; /* offset from beginning of controlvm |
12e364b9 | 123 | * channel to beginning of payload * pool */ |
b3c55b13 | 124 | u32 bytes; /* number of bytes in payload pool */ |
c1f834eb JS |
125 | }; |
126 | ||
127 | static struct visor_controlvm_payload_info controlvm_payload_info; | |
12e364b9 | 128 | |
12e364b9 KC |
129 | /* The following globals are used to handle the scenario where we are unable to |
130 | * offload the payload from a controlvm message due to memory requirements. In | |
131 | * this scenario, we simply stash the controlvm message, then attempt to | |
132 | * process it again the next time controlvm_periodic_work() runs. | |
133 | */ | |
7166ed19 | 134 | static struct controlvm_message controlvm_pending_msg; |
c79b28f7 | 135 | static bool controlvm_pending_msg_valid; |
12e364b9 | 136 | |
12e364b9 KC |
137 | /* This identifies a data buffer that has been received via a controlvm messages |
138 | * in a remote --> local CONTROLVM_TRANSMIT_FILE conversation. | |
139 | */ | |
140 | struct putfile_buffer_entry { | |
141 | struct list_head next; /* putfile_buffer_entry list */ | |
317d9614 | 142 | struct parser_context *parser_ctx; /* points to input data buffer */ |
12e364b9 KC |
143 | }; |
144 | ||
145 | /* List of struct putfile_request *, via next_putfile_request member. | |
146 | * Each entry in this list identifies an outstanding TRANSMIT_FILE | |
147 | * conversation. | |
148 | */ | |
1eee0011 | 149 | static LIST_HEAD(putfile_request_list); |
12e364b9 KC |
150 | |
151 | /* This describes a buffer and its current state of transfer (e.g., how many | |
152 | * bytes have already been supplied as putfile data, and how many bytes are | |
153 | * remaining) for a putfile_request. | |
154 | */ | |
155 | struct putfile_active_buffer { | |
156 | /* a payload from a controlvm message, containing a file data buffer */ | |
317d9614 | 157 | struct parser_context *parser_ctx; |
12e364b9 KC |
158 | /* points within data area of parser_ctx to next byte of data */ |
159 | u8 *pnext; | |
160 | /* # bytes left from <pnext> to the end of this data buffer */ | |
161 | size_t bytes_remaining; | |
162 | }; | |
163 | ||
164 | #define PUTFILE_REQUEST_SIG 0x0906101302281211 | |
165 | /* This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE | |
166 | * conversation. Structs of this type are dynamically linked into | |
167 | * <Putfile_request_list>. | |
168 | */ | |
169 | struct putfile_request { | |
170 | u64 sig; /* PUTFILE_REQUEST_SIG */ | |
171 | ||
172 | /* header from original TransmitFile request */ | |
98d7b594 | 173 | struct controlvm_message_header controlvm_header; |
12e364b9 KC |
174 | u64 file_request_number; /* from original TransmitFile request */ |
175 | ||
176 | /* link to next struct putfile_request */ | |
177 | struct list_head next_putfile_request; | |
178 | ||
179 | /* most-recent sequence number supplied via a controlvm message */ | |
180 | u64 data_sequence_number; | |
181 | ||
182 | /* head of putfile_buffer_entry list, which describes the data to be | |
183 | * supplied as putfile data; | |
184 | * - this list is added to when controlvm messages come in that supply | |
185 | * file data | |
186 | * - this list is removed from via the hotplug program that is actually | |
187 | * consuming these buffers to write as file data */ | |
188 | struct list_head input_buffer_list; | |
189 | spinlock_t req_list_lock; /* lock for input_buffer_list */ | |
190 | ||
191 | /* waiters for input_buffer_list to go non-empty */ | |
192 | wait_queue_head_t input_buffer_wq; | |
193 | ||
194 | /* data not yet read within current putfile_buffer_entry */ | |
195 | struct putfile_active_buffer active_buf; | |
196 | ||
197 | /* <0 = failed, 0 = in-progress, >0 = successful; */ | |
198 | /* note that this must be set with req_list_lock, and if you set <0, */ | |
199 | /* it is your responsibility to also free up all of the other objects */ | |
200 | /* in this struct (like input_buffer_list, active_buf.parser_ctx) */ | |
201 | /* before releasing the lock */ | |
202 | int completion_status; | |
203 | }; | |
204 | ||
12e364b9 KC |
205 | struct parahotplug_request { |
206 | struct list_head list; | |
207 | int id; | |
208 | unsigned long expiration; | |
3ab47701 | 209 | struct controlvm_message msg; |
12e364b9 KC |
210 | }; |
211 | ||
ddf5de53 BR |
212 | static LIST_HEAD(parahotplug_request_list); |
213 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ | |
12e364b9 KC |
214 | static void parahotplug_process_list(void); |
215 | ||
216 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / | |
217 | * CONTROLVM_REPORTEVENT. | |
218 | */ | |
4da3336c | 219 | static struct visorchipset_busdev_notifiers busdev_notifiers; |
12e364b9 | 220 | |
d32517e3 DZ |
221 | static void bus_create_response(struct visor_device *p, int response); |
222 | static void bus_destroy_response(struct visor_device *p, int response); | |
a298bc0b DZ |
223 | static void device_create_response(struct visor_device *p, int response); |
224 | static void device_destroy_response(struct visor_device *p, int response); | |
225 | static void device_resume_response(struct visor_device *p, int response); | |
12e364b9 | 226 | |
a298bc0b DZ |
227 | static void visorchipset_device_pause_response(struct visor_device *p, |
228 | int response); | |
2ee0deec | 229 | |
8e3fedd6 | 230 | static struct visorchipset_busdev_responders busdev_responders = { |
12e364b9 KC |
231 | .bus_create = bus_create_response, |
232 | .bus_destroy = bus_destroy_response, | |
233 | .device_create = device_create_response, | |
234 | .device_destroy = device_destroy_response, | |
927c7927 | 235 | .device_pause = visorchipset_device_pause_response, |
12e364b9 KC |
236 | .device_resume = device_resume_response, |
237 | }; | |
238 | ||
239 | /* info for /dev/visorchipset */ | |
5aa8ae57 | 240 | static dev_t major_dev = -1; /**< indicates major num for device */ |
12e364b9 | 241 | |
19f6634f BR |
242 | /* prototypes for attributes */ |
243 | static ssize_t toolaction_show(struct device *dev, | |
8e76e695 | 244 | struct device_attribute *attr, char *buf); |
19f6634f | 245 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 BR |
246 | struct device_attribute *attr, |
247 | const char *buf, size_t count); | |
19f6634f BR |
248 | static DEVICE_ATTR_RW(toolaction); |
249 | ||
54b31229 | 250 | static ssize_t boottotool_show(struct device *dev, |
8e76e695 | 251 | struct device_attribute *attr, char *buf); |
54b31229 | 252 | static ssize_t boottotool_store(struct device *dev, |
8e76e695 BR |
253 | struct device_attribute *attr, const char *buf, |
254 | size_t count); | |
54b31229 BR |
255 | static DEVICE_ATTR_RW(boottotool); |
256 | ||
422af17c | 257 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8e76e695 | 258 | char *buf); |
422af17c | 259 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 260 | const char *buf, size_t count); |
422af17c BR |
261 | static DEVICE_ATTR_RW(error); |
262 | ||
263 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 264 | char *buf); |
422af17c | 265 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 266 | const char *buf, size_t count); |
422af17c BR |
267 | static DEVICE_ATTR_RW(textid); |
268 | ||
269 | static ssize_t remaining_steps_show(struct device *dev, | |
8e76e695 | 270 | struct device_attribute *attr, char *buf); |
422af17c | 271 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 BR |
272 | struct device_attribute *attr, |
273 | const char *buf, size_t count); | |
422af17c BR |
274 | static DEVICE_ATTR_RW(remaining_steps); |
275 | ||
18b87ed1 | 276 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
277 | struct device_attribute *attr, |
278 | const char *buf, size_t count); | |
18b87ed1 BR |
279 | static DEVICE_ATTR_WO(chipsetready); |
280 | ||
e56fa7cd | 281 | static ssize_t devicedisabled_store(struct device *dev, |
8e76e695 BR |
282 | struct device_attribute *attr, |
283 | const char *buf, size_t count); | |
e56fa7cd BR |
284 | static DEVICE_ATTR_WO(devicedisabled); |
285 | ||
286 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
287 | struct device_attribute *attr, |
288 | const char *buf, size_t count); | |
e56fa7cd BR |
289 | static DEVICE_ATTR_WO(deviceenabled); |
290 | ||
19f6634f BR |
291 | static struct attribute *visorchipset_install_attrs[] = { |
292 | &dev_attr_toolaction.attr, | |
54b31229 | 293 | &dev_attr_boottotool.attr, |
422af17c BR |
294 | &dev_attr_error.attr, |
295 | &dev_attr_textid.attr, | |
296 | &dev_attr_remaining_steps.attr, | |
19f6634f BR |
297 | NULL |
298 | }; | |
299 | ||
300 | static struct attribute_group visorchipset_install_group = { | |
301 | .name = "install", | |
302 | .attrs = visorchipset_install_attrs | |
303 | }; | |
304 | ||
18b87ed1 BR |
305 | static struct attribute *visorchipset_guest_attrs[] = { |
306 | &dev_attr_chipsetready.attr, | |
307 | NULL | |
308 | }; | |
309 | ||
310 | static struct attribute_group visorchipset_guest_group = { | |
311 | .name = "guest", | |
312 | .attrs = visorchipset_guest_attrs | |
313 | }; | |
314 | ||
e56fa7cd BR |
315 | static struct attribute *visorchipset_parahotplug_attrs[] = { |
316 | &dev_attr_devicedisabled.attr, | |
317 | &dev_attr_deviceenabled.attr, | |
318 | NULL | |
319 | }; | |
320 | ||
321 | static struct attribute_group visorchipset_parahotplug_group = { | |
322 | .name = "parahotplug", | |
323 | .attrs = visorchipset_parahotplug_attrs | |
324 | }; | |
325 | ||
19f6634f BR |
326 | static const struct attribute_group *visorchipset_dev_groups[] = { |
327 | &visorchipset_install_group, | |
18b87ed1 | 328 | &visorchipset_guest_group, |
e56fa7cd | 329 | &visorchipset_parahotplug_group, |
19f6634f BR |
330 | NULL |
331 | }; | |
332 | ||
04dacacc DZ |
333 | static void visorchipset_dev_release(struct device *dev) |
334 | { | |
335 | } | |
336 | ||
12e364b9 | 337 | /* /sys/devices/platform/visorchipset */ |
eb34e877 | 338 | static struct platform_device visorchipset_platform_device = { |
12e364b9 KC |
339 | .name = "visorchipset", |
340 | .id = -1, | |
19f6634f | 341 | .dev.groups = visorchipset_dev_groups, |
04dacacc | 342 | .dev.release = visorchipset_dev_release, |
12e364b9 KC |
343 | }; |
344 | ||
345 | /* Function prototypes */ | |
b3168c70 | 346 | static void controlvm_respond(struct controlvm_message_header *msg_hdr, |
98d7b594 BR |
347 | int response); |
348 | static void controlvm_respond_chipset_init( | |
b3168c70 | 349 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 BR |
350 | enum ultra_chipset_feature features); |
351 | static void controlvm_respond_physdev_changestate( | |
b3168c70 | 352 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 353 | struct spar_segment_state state); |
12e364b9 | 354 | |
46168810 | 355 | |
2ee0deec PB |
356 | static void parser_done(struct parser_context *ctx); |
357 | ||
46168810 | 358 | static struct parser_context * |
fbf35536 | 359 | parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry) |
46168810 EA |
360 | { |
361 | int allocbytes = sizeof(struct parser_context) + bytes; | |
362 | struct parser_context *rc = NULL; | |
363 | struct parser_context *ctx = NULL; | |
46168810 EA |
364 | |
365 | if (retry) | |
366 | *retry = false; | |
cc55b5c5 JS |
367 | |
368 | /* | |
369 | * alloc an 0 extra byte to ensure payload is | |
370 | * '\0'-terminated | |
371 | */ | |
372 | allocbytes++; | |
46168810 EA |
373 | if ((controlvm_payload_bytes_buffered + bytes) |
374 | > MAX_CONTROLVM_PAYLOAD_BYTES) { | |
375 | if (retry) | |
376 | *retry = true; | |
377 | rc = NULL; | |
378 | goto cleanup; | |
379 | } | |
380 | ctx = kzalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY); | |
381 | if (!ctx) { | |
382 | if (retry) | |
383 | *retry = true; | |
384 | rc = NULL; | |
385 | goto cleanup; | |
386 | } | |
387 | ||
388 | ctx->allocbytes = allocbytes; | |
389 | ctx->param_bytes = bytes; | |
390 | ctx->curr = NULL; | |
391 | ctx->bytes_remaining = 0; | |
392 | ctx->byte_stream = false; | |
393 | if (local) { | |
394 | void *p; | |
395 | ||
396 | if (addr > virt_to_phys(high_memory - 1)) { | |
397 | rc = NULL; | |
398 | goto cleanup; | |
399 | } | |
400 | p = __va((unsigned long) (addr)); | |
401 | memcpy(ctx->data, p, bytes); | |
402 | } else { | |
3103dc03 | 403 | void *mapping; |
dd412751 JS |
404 | |
405 | if (!request_mem_region(addr, bytes, "visorchipset")) { | |
46168810 EA |
406 | rc = NULL; |
407 | goto cleanup; | |
408 | } | |
712c03dc | 409 | |
3103dc03 | 410 | mapping = memremap(addr, bytes, MEMREMAP_WB); |
dd412751 JS |
411 | if (!mapping) { |
412 | release_mem_region(addr, bytes); | |
46168810 EA |
413 | rc = NULL; |
414 | goto cleanup; | |
415 | } | |
3103dc03 | 416 | memcpy(ctx->data, mapping, bytes); |
dd412751 | 417 | release_mem_region(addr, bytes); |
3103dc03 | 418 | memunmap(mapping); |
46168810 | 419 | } |
46168810 | 420 | |
cc55b5c5 | 421 | ctx->byte_stream = true; |
46168810 EA |
422 | rc = ctx; |
423 | cleanup: | |
46168810 EA |
424 | if (rc) { |
425 | controlvm_payload_bytes_buffered += ctx->param_bytes; | |
426 | } else { | |
427 | if (ctx) { | |
428 | parser_done(ctx); | |
429 | ctx = NULL; | |
430 | } | |
431 | } | |
432 | return rc; | |
433 | } | |
434 | ||
464129ed | 435 | static uuid_le |
46168810 EA |
436 | parser_id_get(struct parser_context *ctx) |
437 | { | |
438 | struct spar_controlvm_parameters_header *phdr = NULL; | |
439 | ||
440 | if (ctx == NULL) | |
441 | return NULL_UUID_LE; | |
442 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
443 | return phdr->id; | |
444 | } | |
445 | ||
2ee0deec PB |
446 | /** Describes the state from the perspective of which controlvm messages have |
447 | * been received for a bus or device. | |
448 | */ | |
449 | ||
450 | enum PARSER_WHICH_STRING { | |
451 | PARSERSTRING_INITIATOR, | |
452 | PARSERSTRING_TARGET, | |
453 | PARSERSTRING_CONNECTION, | |
454 | PARSERSTRING_NAME, /* TODO: only PARSERSTRING_NAME is used ? */ | |
455 | }; | |
456 | ||
464129ed | 457 | static void |
2ee0deec PB |
458 | parser_param_start(struct parser_context *ctx, |
459 | enum PARSER_WHICH_STRING which_string) | |
46168810 EA |
460 | { |
461 | struct spar_controlvm_parameters_header *phdr = NULL; | |
462 | ||
463 | if (ctx == NULL) | |
464 | goto Away; | |
465 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
466 | switch (which_string) { | |
467 | case PARSERSTRING_INITIATOR: | |
468 | ctx->curr = ctx->data + phdr->initiator_offset; | |
469 | ctx->bytes_remaining = phdr->initiator_length; | |
470 | break; | |
471 | case PARSERSTRING_TARGET: | |
472 | ctx->curr = ctx->data + phdr->target_offset; | |
473 | ctx->bytes_remaining = phdr->target_length; | |
474 | break; | |
475 | case PARSERSTRING_CONNECTION: | |
476 | ctx->curr = ctx->data + phdr->connection_offset; | |
477 | ctx->bytes_remaining = phdr->connection_length; | |
478 | break; | |
479 | case PARSERSTRING_NAME: | |
480 | ctx->curr = ctx->data + phdr->name_offset; | |
481 | ctx->bytes_remaining = phdr->name_length; | |
482 | break; | |
483 | default: | |
484 | break; | |
485 | } | |
486 | ||
487 | Away: | |
488 | return; | |
489 | } | |
490 | ||
464129ed | 491 | static void parser_done(struct parser_context *ctx) |
46168810 EA |
492 | { |
493 | if (!ctx) | |
494 | return; | |
495 | controlvm_payload_bytes_buffered -= ctx->param_bytes; | |
496 | kfree(ctx); | |
497 | } | |
498 | ||
464129ed | 499 | static void * |
46168810 EA |
500 | parser_string_get(struct parser_context *ctx) |
501 | { | |
502 | u8 *pscan; | |
503 | unsigned long nscan; | |
504 | int value_length = -1; | |
505 | void *value = NULL; | |
506 | int i; | |
507 | ||
508 | if (!ctx) | |
509 | return NULL; | |
510 | pscan = ctx->curr; | |
511 | nscan = ctx->bytes_remaining; | |
512 | if (nscan == 0) | |
513 | return NULL; | |
514 | if (!pscan) | |
515 | return NULL; | |
516 | for (i = 0, value_length = -1; i < nscan; i++) | |
517 | if (pscan[i] == '\0') { | |
518 | value_length = i; | |
519 | break; | |
520 | } | |
521 | if (value_length < 0) /* '\0' was not included in the length */ | |
522 | value_length = nscan; | |
523 | value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY); | |
524 | if (value == NULL) | |
525 | return NULL; | |
526 | if (value_length > 0) | |
527 | memcpy(value, pscan, value_length); | |
528 | ((u8 *) (value))[value_length] = '\0'; | |
529 | return value; | |
530 | } | |
531 | ||
532 | ||
d746cb55 VB |
533 | static ssize_t toolaction_show(struct device *dev, |
534 | struct device_attribute *attr, | |
535 | char *buf) | |
19f6634f | 536 | { |
01f4d85a | 537 | u8 tool_action; |
19f6634f | 538 | |
c3d9a224 | 539 | visorchannel_read(controlvm_channel, |
d19642f6 | 540 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 | 541 | tool_action), &tool_action, sizeof(u8)); |
01f4d85a | 542 | return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action); |
19f6634f BR |
543 | } |
544 | ||
d746cb55 VB |
545 | static ssize_t toolaction_store(struct device *dev, |
546 | struct device_attribute *attr, | |
547 | const char *buf, size_t count) | |
19f6634f | 548 | { |
01f4d85a | 549 | u8 tool_action; |
66e24b76 | 550 | int ret; |
19f6634f | 551 | |
ebec8967 | 552 | if (kstrtou8(buf, 10, &tool_action)) |
66e24b76 BR |
553 | return -EINVAL; |
554 | ||
c3d9a224 | 555 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
556 | offsetof(struct spar_controlvm_channel_protocol, |
557 | tool_action), | |
01f4d85a | 558 | &tool_action, sizeof(u8)); |
66e24b76 BR |
559 | |
560 | if (ret) | |
561 | return ret; | |
e22a4a0f | 562 | return count; |
19f6634f BR |
563 | } |
564 | ||
d746cb55 VB |
565 | static ssize_t boottotool_show(struct device *dev, |
566 | struct device_attribute *attr, | |
567 | char *buf) | |
54b31229 | 568 | { |
365522d9 | 569 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 570 | |
c3d9a224 | 571 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
572 | offsetof(struct spar_controlvm_channel_protocol, |
573 | efi_spar_ind), &efi_spar_indication, | |
574 | sizeof(struct efi_spar_indication)); | |
54b31229 | 575 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
8e76e695 | 576 | efi_spar_indication.boot_to_tool); |
54b31229 BR |
577 | } |
578 | ||
d746cb55 VB |
579 | static ssize_t boottotool_store(struct device *dev, |
580 | struct device_attribute *attr, | |
581 | const char *buf, size_t count) | |
54b31229 | 582 | { |
66e24b76 | 583 | int val, ret; |
365522d9 | 584 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 585 | |
ebec8967 | 586 | if (kstrtoint(buf, 10, &val)) |
66e24b76 BR |
587 | return -EINVAL; |
588 | ||
365522d9 | 589 | efi_spar_indication.boot_to_tool = val; |
c3d9a224 | 590 | ret = visorchannel_write(controlvm_channel, |
d19642f6 | 591 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 BR |
592 | efi_spar_ind), &(efi_spar_indication), |
593 | sizeof(struct efi_spar_indication)); | |
66e24b76 BR |
594 | |
595 | if (ret) | |
596 | return ret; | |
e22a4a0f | 597 | return count; |
54b31229 | 598 | } |
422af17c BR |
599 | |
600 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 601 | char *buf) |
422af17c BR |
602 | { |
603 | u32 error; | |
604 | ||
8e76e695 BR |
605 | visorchannel_read(controlvm_channel, |
606 | offsetof(struct spar_controlvm_channel_protocol, | |
607 | installation_error), | |
608 | &error, sizeof(u32)); | |
422af17c BR |
609 | return scnprintf(buf, PAGE_SIZE, "%i\n", error); |
610 | } | |
611 | ||
612 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 613 | const char *buf, size_t count) |
422af17c BR |
614 | { |
615 | u32 error; | |
66e24b76 | 616 | int ret; |
422af17c | 617 | |
ebec8967 | 618 | if (kstrtou32(buf, 10, &error)) |
66e24b76 BR |
619 | return -EINVAL; |
620 | ||
c3d9a224 | 621 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
622 | offsetof(struct spar_controlvm_channel_protocol, |
623 | installation_error), | |
624 | &error, sizeof(u32)); | |
66e24b76 BR |
625 | if (ret) |
626 | return ret; | |
e22a4a0f | 627 | return count; |
422af17c BR |
628 | } |
629 | ||
630 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 631 | char *buf) |
422af17c | 632 | { |
10dbf0e3 | 633 | u32 text_id; |
422af17c | 634 | |
8e76e695 BR |
635 | visorchannel_read(controlvm_channel, |
636 | offsetof(struct spar_controlvm_channel_protocol, | |
637 | installation_text_id), | |
638 | &text_id, sizeof(u32)); | |
10dbf0e3 | 639 | return scnprintf(buf, PAGE_SIZE, "%i\n", text_id); |
422af17c BR |
640 | } |
641 | ||
642 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 643 | const char *buf, size_t count) |
422af17c | 644 | { |
10dbf0e3 | 645 | u32 text_id; |
66e24b76 | 646 | int ret; |
422af17c | 647 | |
ebec8967 | 648 | if (kstrtou32(buf, 10, &text_id)) |
66e24b76 BR |
649 | return -EINVAL; |
650 | ||
c3d9a224 | 651 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
652 | offsetof(struct spar_controlvm_channel_protocol, |
653 | installation_text_id), | |
654 | &text_id, sizeof(u32)); | |
66e24b76 BR |
655 | if (ret) |
656 | return ret; | |
e22a4a0f | 657 | return count; |
422af17c BR |
658 | } |
659 | ||
422af17c | 660 | static ssize_t remaining_steps_show(struct device *dev, |
8e76e695 | 661 | struct device_attribute *attr, char *buf) |
422af17c | 662 | { |
ee8da290 | 663 | u16 remaining_steps; |
422af17c | 664 | |
c3d9a224 | 665 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
666 | offsetof(struct spar_controlvm_channel_protocol, |
667 | installation_remaining_steps), | |
668 | &remaining_steps, sizeof(u16)); | |
ee8da290 | 669 | return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps); |
422af17c BR |
670 | } |
671 | ||
672 | static ssize_t remaining_steps_store(struct device *dev, | |
8e76e695 BR |
673 | struct device_attribute *attr, |
674 | const char *buf, size_t count) | |
422af17c | 675 | { |
ee8da290 | 676 | u16 remaining_steps; |
66e24b76 | 677 | int ret; |
422af17c | 678 | |
ebec8967 | 679 | if (kstrtou16(buf, 10, &remaining_steps)) |
66e24b76 BR |
680 | return -EINVAL; |
681 | ||
c3d9a224 | 682 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
683 | offsetof(struct spar_controlvm_channel_protocol, |
684 | installation_remaining_steps), | |
685 | &remaining_steps, sizeof(u16)); | |
66e24b76 BR |
686 | if (ret) |
687 | return ret; | |
e22a4a0f | 688 | return count; |
422af17c BR |
689 | } |
690 | ||
ab0592b9 DZ |
691 | struct visor_busdev { |
692 | u32 bus_no; | |
693 | u32 dev_no; | |
694 | }; | |
695 | ||
696 | static int match_visorbus_dev_by_id(struct device *dev, void *data) | |
697 | { | |
698 | struct visor_device *vdev = to_visor_device(dev); | |
7f44582e | 699 | struct visor_busdev *id = data; |
ab0592b9 DZ |
700 | u32 bus_no = id->bus_no; |
701 | u32 dev_no = id->dev_no; | |
702 | ||
65bd6e46 DZ |
703 | if ((vdev->chipset_bus_no == bus_no) && |
704 | (vdev->chipset_dev_no == dev_no)) | |
ab0592b9 DZ |
705 | return 1; |
706 | ||
707 | return 0; | |
708 | } | |
709 | struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, | |
710 | struct visor_device *from) | |
711 | { | |
712 | struct device *dev; | |
713 | struct device *dev_start = NULL; | |
714 | struct visor_device *vdev = NULL; | |
715 | struct visor_busdev id = { | |
716 | .bus_no = bus_no, | |
717 | .dev_no = dev_no | |
718 | }; | |
719 | ||
720 | if (from) | |
721 | dev_start = &from->device; | |
722 | dev = bus_find_device(&visorbus_type, dev_start, (void *)&id, | |
723 | match_visorbus_dev_by_id); | |
724 | if (dev) | |
725 | vdev = to_visor_device(dev); | |
726 | return vdev; | |
727 | } | |
728 | EXPORT_SYMBOL(visorbus_get_device_by_id); | |
729 | ||
c242233e | 730 | static u8 |
12e364b9 KC |
731 | check_chipset_events(void) |
732 | { | |
733 | int i; | |
c242233e | 734 | u8 send_msg = 1; |
12e364b9 KC |
735 | /* Check events to determine if response should be sent */ |
736 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
737 | send_msg &= chipset_events[i]; | |
738 | return send_msg; | |
739 | } | |
740 | ||
741 | static void | |
742 | clear_chipset_events(void) | |
743 | { | |
744 | int i; | |
745 | /* Clear chipset_events */ | |
746 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
747 | chipset_events[i] = 0; | |
748 | } | |
749 | ||
750 | void | |
4da3336c | 751 | visorchipset_register_busdev( |
fe90d892 | 752 | struct visorchipset_busdev_notifiers *notifiers, |
929aa8ae | 753 | struct visorchipset_busdev_responders *responders, |
1e7a59c1 | 754 | struct ultra_vbus_deviceinfo *driver_info) |
12e364b9 | 755 | { |
8f1947ac | 756 | down(¬ifier_lock); |
38f736e9 | 757 | if (!notifiers) { |
4da3336c DK |
758 | memset(&busdev_notifiers, 0, |
759 | sizeof(busdev_notifiers)); | |
760 | visorbusregistered = 0; /* clear flag */ | |
12e364b9 | 761 | } else { |
4da3336c DK |
762 | busdev_notifiers = *notifiers; |
763 | visorbusregistered = 1; /* set flag */ | |
12e364b9 KC |
764 | } |
765 | if (responders) | |
8e3fedd6 | 766 | *responders = busdev_responders; |
1e7a59c1 BR |
767 | if (driver_info) |
768 | bus_device_info_init(driver_info, "chipset", "visorchipset", | |
8e76e695 | 769 | VERSION, NULL); |
12e364b9 | 770 | |
8f1947ac | 771 | up(¬ifier_lock); |
12e364b9 | 772 | } |
4da3336c | 773 | EXPORT_SYMBOL_GPL(visorchipset_register_busdev); |
12e364b9 | 774 | |
12e364b9 | 775 | static void |
3ab47701 | 776 | chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
777 | { |
778 | static int chipset_inited; | |
b9b141e8 | 779 | enum ultra_chipset_feature features = 0; |
12e364b9 KC |
780 | int rc = CONTROLVM_RESP_SUCCESS; |
781 | ||
782 | POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
783 | if (chipset_inited) { | |
22ad57ba | 784 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
e3199b2e | 785 | goto cleanup; |
12e364b9 KC |
786 | } |
787 | chipset_inited = 1; | |
788 | POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); | |
789 | ||
790 | /* Set features to indicate we support parahotplug (if Command | |
791 | * also supports it). */ | |
792 | features = | |
2ea5117b | 793 | inmsg->cmd.init_chipset. |
12e364b9 KC |
794 | features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; |
795 | ||
796 | /* Set the "reply" bit so Command knows this is a | |
797 | * features-aware driver. */ | |
798 | features |= ULTRA_CHIPSET_FEATURE_REPLY; | |
799 | ||
e3199b2e | 800 | cleanup: |
98d7b594 | 801 | if (inmsg->hdr.flags.response_expected) |
12e364b9 KC |
802 | controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
803 | } | |
804 | ||
805 | static void | |
3ab47701 | 806 | controlvm_init_response(struct controlvm_message *msg, |
b3168c70 | 807 | struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 808 | { |
3ab47701 | 809 | memset(msg, 0, sizeof(struct controlvm_message)); |
b3168c70 | 810 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); |
98d7b594 BR |
811 | msg->hdr.payload_bytes = 0; |
812 | msg->hdr.payload_vm_offset = 0; | |
813 | msg->hdr.payload_max_bytes = 0; | |
12e364b9 | 814 | if (response < 0) { |
98d7b594 BR |
815 | msg->hdr.flags.failed = 1; |
816 | msg->hdr.completion_status = (u32) (-response); | |
12e364b9 KC |
817 | } |
818 | } | |
819 | ||
820 | static void | |
b3168c70 | 821 | controlvm_respond(struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 822 | { |
3ab47701 | 823 | struct controlvm_message outmsg; |
26eb2c0c | 824 | |
b3168c70 | 825 | controlvm_init_response(&outmsg, msg_hdr, response); |
2098dbd1 | 826 | if (outmsg.hdr.flags.test_message == 1) |
12e364b9 | 827 | return; |
2098dbd1 | 828 | |
c3d9a224 | 829 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 830 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
831 | return; |
832 | } | |
833 | } | |
834 | ||
835 | static void | |
b3168c70 | 836 | controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, |
98d7b594 | 837 | int response, |
b9b141e8 | 838 | enum ultra_chipset_feature features) |
12e364b9 | 839 | { |
3ab47701 | 840 | struct controlvm_message outmsg; |
26eb2c0c | 841 | |
b3168c70 | 842 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b | 843 | outmsg.cmd.init_chipset.features = features; |
c3d9a224 | 844 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 845 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
846 | return; |
847 | } | |
848 | } | |
849 | ||
98d7b594 | 850 | static void controlvm_respond_physdev_changestate( |
b3168c70 | 851 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 852 | struct spar_segment_state state) |
12e364b9 | 853 | { |
3ab47701 | 854 | struct controlvm_message outmsg; |
26eb2c0c | 855 | |
b3168c70 | 856 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b BR |
857 | outmsg.cmd.device_change_state.state = state; |
858 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
c3d9a224 | 859 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 860 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
861 | return; |
862 | } | |
863 | } | |
864 | ||
2ee0deec PB |
865 | enum crash_obj_type { |
866 | CRASH_DEV, | |
867 | CRASH_BUS, | |
868 | }; | |
869 | ||
12e364b9 | 870 | static void |
0274b5ae DZ |
871 | bus_responder(enum controlvm_id cmd_id, |
872 | struct controlvm_message_header *pending_msg_hdr, | |
3032aedd | 873 | int response) |
12e364b9 | 874 | { |
0274b5ae DZ |
875 | if (pending_msg_hdr == NULL) |
876 | return; /* no controlvm response needed */ | |
12e364b9 | 877 | |
0274b5ae | 878 | if (pending_msg_hdr->id != (u32)cmd_id) |
12e364b9 | 879 | return; |
0aca7844 | 880 | |
0274b5ae | 881 | controlvm_respond(pending_msg_hdr, response); |
12e364b9 KC |
882 | } |
883 | ||
884 | static void | |
fbb31f48 | 885 | device_changestate_responder(enum controlvm_id cmd_id, |
a298bc0b | 886 | struct visor_device *p, int response, |
fbb31f48 | 887 | struct spar_segment_state response_state) |
12e364b9 | 888 | { |
3ab47701 | 889 | struct controlvm_message outmsg; |
a298bc0b DZ |
890 | u32 bus_no = p->chipset_bus_no; |
891 | u32 dev_no = p->chipset_dev_no; | |
12e364b9 | 892 | |
0274b5ae | 893 | if (p->pending_msg_hdr == NULL) |
12e364b9 | 894 | return; /* no controlvm response needed */ |
0274b5ae | 895 | if (p->pending_msg_hdr->id != cmd_id) |
12e364b9 | 896 | return; |
12e364b9 | 897 | |
0274b5ae | 898 | controlvm_init_response(&outmsg, p->pending_msg_hdr, response); |
12e364b9 | 899 | |
fbb31f48 BR |
900 | outmsg.cmd.device_change_state.bus_no = bus_no; |
901 | outmsg.cmd.device_change_state.dev_no = dev_no; | |
902 | outmsg.cmd.device_change_state.state = response_state; | |
12e364b9 | 903 | |
c3d9a224 | 904 | if (!visorchannel_signalinsert(controlvm_channel, |
0aca7844 | 905 | CONTROLVM_QUEUE_REQUEST, &outmsg)) |
12e364b9 | 906 | return; |
12e364b9 KC |
907 | } |
908 | ||
909 | static void | |
0274b5ae DZ |
910 | device_responder(enum controlvm_id cmd_id, |
911 | struct controlvm_message_header *pending_msg_hdr, | |
b4b598fd | 912 | int response) |
12e364b9 | 913 | { |
0274b5ae | 914 | if (pending_msg_hdr == NULL) |
12e364b9 | 915 | return; /* no controlvm response needed */ |
0aca7844 | 916 | |
0274b5ae | 917 | if (pending_msg_hdr->id != (u32)cmd_id) |
12e364b9 | 918 | return; |
0aca7844 | 919 | |
0274b5ae | 920 | controlvm_respond(pending_msg_hdr, response); |
12e364b9 KC |
921 | } |
922 | ||
923 | static void | |
d32517e3 | 924 | bus_epilog(struct visor_device *bus_info, |
2836c6a8 | 925 | u32 cmd, struct controlvm_message_header *msg_hdr, |
f4c11551 | 926 | int response, bool need_response) |
12e364b9 | 927 | { |
f4c11551 | 928 | bool notified = false; |
0274b5ae | 929 | struct controlvm_message_header *pmsg_hdr = NULL; |
12e364b9 | 930 | |
0274b5ae DZ |
931 | if (!bus_info) { |
932 | /* relying on a valid passed in response code */ | |
933 | /* be lazy and re-use msg_hdr for this failure, is this ok?? */ | |
934 | pmsg_hdr = msg_hdr; | |
935 | goto away; | |
936 | } | |
937 | ||
938 | if (bus_info->pending_msg_hdr) { | |
939 | /* only non-NULL if dev is still waiting on a response */ | |
940 | response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; | |
941 | pmsg_hdr = bus_info->pending_msg_hdr; | |
942 | goto away; | |
943 | } | |
0aca7844 | 944 | |
2836c6a8 | 945 | if (need_response) { |
0274b5ae DZ |
946 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); |
947 | if (!pmsg_hdr) { | |
948 | response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
949 | goto away; | |
950 | } | |
951 | ||
952 | memcpy(pmsg_hdr, msg_hdr, | |
98d7b594 | 953 | sizeof(struct controlvm_message_header)); |
0274b5ae | 954 | bus_info->pending_msg_hdr = pmsg_hdr; |
75c1f8b7 | 955 | } |
12e364b9 | 956 | |
8f1947ac | 957 | down(¬ifier_lock); |
12e364b9 KC |
958 | if (response == CONTROLVM_RESP_SUCCESS) { |
959 | switch (cmd) { | |
960 | case CONTROLVM_BUS_CREATE: | |
4da3336c | 961 | if (busdev_notifiers.bus_create) { |
3032aedd | 962 | (*busdev_notifiers.bus_create) (bus_info); |
f4c11551 | 963 | notified = true; |
12e364b9 KC |
964 | } |
965 | break; | |
966 | case CONTROLVM_BUS_DESTROY: | |
4da3336c | 967 | if (busdev_notifiers.bus_destroy) { |
3032aedd | 968 | (*busdev_notifiers.bus_destroy) (bus_info); |
f4c11551 | 969 | notified = true; |
12e364b9 KC |
970 | } |
971 | break; | |
972 | } | |
973 | } | |
0274b5ae | 974 | away: |
12e364b9 KC |
975 | if (notified) |
976 | /* The callback function just called above is responsible | |
929aa8ae | 977 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
978 | * function, which will call bus_responder() |
979 | */ | |
980 | ; | |
981 | else | |
0274b5ae DZ |
982 | /* |
983 | * Do not kfree(pmsg_hdr) as this is the failure path. | |
984 | * The success path ('notified') will call the responder | |
985 | * directly and kfree() there. | |
986 | */ | |
987 | bus_responder(cmd, pmsg_hdr, response); | |
8f1947ac | 988 | up(¬ifier_lock); |
12e364b9 KC |
989 | } |
990 | ||
991 | static void | |
a298bc0b | 992 | device_epilog(struct visor_device *dev_info, |
b4b598fd | 993 | struct spar_segment_state state, u32 cmd, |
2836c6a8 | 994 | struct controlvm_message_header *msg_hdr, int response, |
f4c11551 | 995 | bool need_response, bool for_visorbus) |
12e364b9 | 996 | { |
e82ba62e | 997 | struct visorchipset_busdev_notifiers *notifiers; |
f4c11551 | 998 | bool notified = false; |
0274b5ae | 999 | struct controlvm_message_header *pmsg_hdr = NULL; |
12e364b9 | 1000 | |
4da3336c DK |
1001 | notifiers = &busdev_notifiers; |
1002 | ||
0274b5ae DZ |
1003 | if (!dev_info) { |
1004 | /* relying on a valid passed in response code */ | |
1005 | /* be lazy and re-use msg_hdr for this failure, is this ok?? */ | |
1006 | pmsg_hdr = msg_hdr; | |
1007 | goto away; | |
1008 | } | |
1009 | ||
1010 | if (dev_info->pending_msg_hdr) { | |
1011 | /* only non-NULL if dev is still waiting on a response */ | |
1012 | response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; | |
1013 | pmsg_hdr = dev_info->pending_msg_hdr; | |
1014 | goto away; | |
1015 | } | |
1016 | ||
2836c6a8 | 1017 | if (need_response) { |
0274b5ae DZ |
1018 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); |
1019 | if (!pmsg_hdr) { | |
1020 | response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1021 | goto away; | |
1022 | } | |
1023 | ||
1024 | memcpy(pmsg_hdr, msg_hdr, | |
98d7b594 | 1025 | sizeof(struct controlvm_message_header)); |
0274b5ae | 1026 | dev_info->pending_msg_hdr = pmsg_hdr; |
75c1f8b7 | 1027 | } |
12e364b9 | 1028 | |
8f1947ac | 1029 | down(¬ifier_lock); |
12e364b9 KC |
1030 | if (response >= 0) { |
1031 | switch (cmd) { | |
1032 | case CONTROLVM_DEVICE_CREATE: | |
1033 | if (notifiers->device_create) { | |
b4b598fd | 1034 | (*notifiers->device_create) (dev_info); |
f4c11551 | 1035 | notified = true; |
12e364b9 KC |
1036 | } |
1037 | break; | |
1038 | case CONTROLVM_DEVICE_CHANGESTATE: | |
1039 | /* ServerReady / ServerRunning / SegmentStateRunning */ | |
bd0d2dcc BR |
1040 | if (state.alive == segment_state_running.alive && |
1041 | state.operating == | |
1042 | segment_state_running.operating) { | |
12e364b9 | 1043 | if (notifiers->device_resume) { |
b4b598fd | 1044 | (*notifiers->device_resume) (dev_info); |
f4c11551 | 1045 | notified = true; |
12e364b9 KC |
1046 | } |
1047 | } | |
1048 | /* ServerNotReady / ServerLost / SegmentStateStandby */ | |
bd0d2dcc | 1049 | else if (state.alive == segment_state_standby.alive && |
3f833b54 | 1050 | state.operating == |
bd0d2dcc | 1051 | segment_state_standby.operating) { |
12e364b9 KC |
1052 | /* technically this is standby case |
1053 | * where server is lost | |
1054 | */ | |
1055 | if (notifiers->device_pause) { | |
b4b598fd | 1056 | (*notifiers->device_pause) (dev_info); |
f4c11551 | 1057 | notified = true; |
12e364b9 | 1058 | } |
12e364b9 KC |
1059 | } |
1060 | break; | |
1061 | case CONTROLVM_DEVICE_DESTROY: | |
1062 | if (notifiers->device_destroy) { | |
b4b598fd | 1063 | (*notifiers->device_destroy) (dev_info); |
f4c11551 | 1064 | notified = true; |
12e364b9 KC |
1065 | } |
1066 | break; | |
1067 | } | |
1068 | } | |
0274b5ae | 1069 | away: |
12e364b9 KC |
1070 | if (notified) |
1071 | /* The callback function just called above is responsible | |
929aa8ae | 1072 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1073 | * function, which will call device_responder() |
1074 | */ | |
1075 | ; | |
1076 | else | |
0274b5ae DZ |
1077 | /* |
1078 | * Do not kfree(pmsg_hdr) as this is the failure path. | |
1079 | * The success path ('notified') will call the responder | |
1080 | * directly and kfree() there. | |
1081 | */ | |
1082 | device_responder(cmd, pmsg_hdr, response); | |
8f1947ac | 1083 | up(¬ifier_lock); |
12e364b9 KC |
1084 | } |
1085 | ||
1086 | static void | |
3ab47701 | 1087 | bus_create(struct controlvm_message *inmsg) |
12e364b9 | 1088 | { |
2ea5117b | 1089 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1090 | u32 bus_no = cmd->create_bus.bus_no; |
12e364b9 | 1091 | int rc = CONTROLVM_RESP_SUCCESS; |
d32517e3 | 1092 | struct visor_device *bus_info; |
b32c4997 | 1093 | struct visorchannel *visorchannel; |
12e364b9 | 1094 | |
d32517e3 | 1095 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
6c5fed35 BR |
1096 | if (bus_info && (bus_info->state.created == 1)) { |
1097 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1098 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1099 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
6c5fed35 | 1100 | goto cleanup; |
12e364b9 | 1101 | } |
6c5fed35 BR |
1102 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
1103 | if (!bus_info) { | |
1104 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1105 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1106 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
6c5fed35 | 1107 | goto cleanup; |
12e364b9 KC |
1108 | } |
1109 | ||
4abce83d | 1110 | INIT_LIST_HEAD(&bus_info->list_all); |
d32517e3 DZ |
1111 | bus_info->chipset_bus_no = bus_no; |
1112 | bus_info->chipset_dev_no = BUS_ROOT_DEVICE; | |
12e364b9 | 1113 | |
6c5fed35 | 1114 | POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1115 | |
b32c4997 DZ |
1116 | visorchannel = visorchannel_create(cmd->create_bus.channel_addr, |
1117 | cmd->create_bus.channel_bytes, | |
1118 | GFP_KERNEL, | |
1119 | cmd->create_bus.bus_data_type_uuid); | |
1120 | ||
1121 | if (!visorchannel) { | |
1122 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
1123 | POSTCODE_SEVERITY_ERR); | |
1124 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1125 | kfree(bus_info); | |
1126 | bus_info = NULL; | |
1127 | goto cleanup; | |
1128 | } | |
1129 | bus_info->visorchannel = visorchannel; | |
12e364b9 | 1130 | |
6c5fed35 | 1131 | POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1132 | |
6c5fed35 | 1133 | cleanup: |
3032aedd | 1134 | bus_epilog(bus_info, CONTROLVM_BUS_CREATE, &inmsg->hdr, |
98d7b594 | 1135 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1136 | } |
1137 | ||
1138 | static void | |
3ab47701 | 1139 | bus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1140 | { |
2ea5117b | 1141 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1142 | u32 bus_no = cmd->destroy_bus.bus_no; |
d32517e3 | 1143 | struct visor_device *bus_info; |
12e364b9 KC |
1144 | int rc = CONTROLVM_RESP_SUCCESS; |
1145 | ||
d32517e3 | 1146 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
dff54cd6 | 1147 | if (!bus_info) |
22ad57ba | 1148 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
dff54cd6 | 1149 | else if (bus_info->state.created == 0) |
22ad57ba | 1150 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1151 | |
3032aedd | 1152 | bus_epilog(bus_info, CONTROLVM_BUS_DESTROY, &inmsg->hdr, |
98d7b594 | 1153 | rc, inmsg->hdr.flags.response_expected == 1); |
d32517e3 DZ |
1154 | |
1155 | /* bus_info is freed as part of the busdevice_release function */ | |
12e364b9 KC |
1156 | } |
1157 | ||
1158 | static void | |
317d9614 BR |
1159 | bus_configure(struct controlvm_message *inmsg, |
1160 | struct parser_context *parser_ctx) | |
12e364b9 | 1161 | { |
2ea5117b | 1162 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e | 1163 | u32 bus_no; |
d32517e3 | 1164 | struct visor_device *bus_info; |
12e364b9 | 1165 | int rc = CONTROLVM_RESP_SUCCESS; |
12e364b9 | 1166 | |
654bada0 BR |
1167 | bus_no = cmd->configure_bus.bus_no; |
1168 | POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no, | |
1169 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1170 | |
d32517e3 | 1171 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
654bada0 BR |
1172 | if (!bus_info) { |
1173 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1174 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1175 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1176 | } else if (bus_info->state.created == 0) { |
1177 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1178 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1179 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
0274b5ae | 1180 | } else if (bus_info->pending_msg_hdr != NULL) { |
654bada0 | 1181 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, |
12e364b9 | 1182 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1183 | rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; |
654bada0 | 1184 | } else { |
b32c4997 DZ |
1185 | visorchannel_set_clientpartition(bus_info->visorchannel, |
1186 | cmd->configure_bus.guest_handle); | |
654bada0 BR |
1187 | bus_info->partition_uuid = parser_id_get(parser_ctx); |
1188 | parser_param_start(parser_ctx, PARSERSTRING_NAME); | |
1189 | bus_info->name = parser_string_get(parser_ctx); | |
1190 | ||
654bada0 BR |
1191 | POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no, |
1192 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1193 | } |
3032aedd | 1194 | bus_epilog(bus_info, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, |
98d7b594 | 1195 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1196 | } |
1197 | ||
1198 | static void | |
3ab47701 | 1199 | my_device_create(struct controlvm_message *inmsg) |
12e364b9 | 1200 | { |
2ea5117b | 1201 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1202 | u32 bus_no = cmd->create_device.bus_no; |
1203 | u32 dev_no = cmd->create_device.dev_no; | |
a298bc0b | 1204 | struct visor_device *dev_info = NULL; |
d32517e3 | 1205 | struct visor_device *bus_info; |
b32c4997 | 1206 | struct visorchannel *visorchannel; |
12e364b9 KC |
1207 | int rc = CONTROLVM_RESP_SUCCESS; |
1208 | ||
a298bc0b DZ |
1209 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
1210 | if (!bus_info) { | |
c60c8e26 | 1211 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1212 | POSTCODE_SEVERITY_ERR); |
a298bc0b | 1213 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1214 | goto cleanup; |
12e364b9 | 1215 | } |
a298bc0b DZ |
1216 | |
1217 | if (bus_info->state.created == 0) { | |
c60c8e26 | 1218 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1219 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1220 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1221 | goto cleanup; |
12e364b9 | 1222 | } |
a298bc0b DZ |
1223 | |
1224 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); | |
1225 | if (dev_info && (dev_info->state.created == 1)) { | |
c60c8e26 | 1226 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1227 | POSTCODE_SEVERITY_ERR); |
a298bc0b | 1228 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
c60c8e26 | 1229 | goto cleanup; |
12e364b9 | 1230 | } |
a298bc0b | 1231 | |
c60c8e26 BR |
1232 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
1233 | if (!dev_info) { | |
1234 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1235 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1236 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
c60c8e26 | 1237 | goto cleanup; |
12e364b9 | 1238 | } |
97a84f12 | 1239 | |
a298bc0b DZ |
1240 | dev_info->chipset_bus_no = bus_no; |
1241 | dev_info->chipset_dev_no = dev_no; | |
1242 | dev_info->inst = cmd->create_device.dev_inst_uuid; | |
1243 | ||
1244 | /* not sure where the best place to set the 'parent' */ | |
1245 | dev_info->device.parent = &bus_info->device; | |
1246 | ||
c60c8e26 | 1247 | POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, |
12e364b9 KC |
1248 | POSTCODE_SEVERITY_INFO); |
1249 | ||
a3ef1a8e DK |
1250 | visorchannel = |
1251 | visorchannel_create_with_lock(cmd->create_device.channel_addr, | |
1252 | cmd->create_device.channel_bytes, | |
1253 | GFP_KERNEL, | |
1254 | cmd->create_device.data_type_uuid); | |
b32c4997 DZ |
1255 | |
1256 | if (!visorchannel) { | |
1257 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
1258 | POSTCODE_SEVERITY_ERR); | |
1259 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1260 | kfree(dev_info); | |
1261 | dev_info = NULL; | |
1262 | goto cleanup; | |
1263 | } | |
1264 | dev_info->visorchannel = visorchannel; | |
1265 | dev_info->channel_type_guid = cmd->create_device.data_type_uuid; | |
c60c8e26 | 1266 | POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no, |
12e364b9 | 1267 | POSTCODE_SEVERITY_INFO); |
c60c8e26 | 1268 | cleanup: |
b4b598fd | 1269 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1270 | CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, |
4da3336c | 1271 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1272 | } |
1273 | ||
1274 | static void | |
3ab47701 | 1275 | my_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 1276 | { |
2ea5117b | 1277 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1278 | u32 bus_no = cmd->device_change_state.bus_no; |
1279 | u32 dev_no = cmd->device_change_state.dev_no; | |
2ea5117b | 1280 | struct spar_segment_state state = cmd->device_change_state.state; |
a298bc0b | 1281 | struct visor_device *dev_info; |
12e364b9 KC |
1282 | int rc = CONTROLVM_RESP_SUCCESS; |
1283 | ||
a298bc0b | 1284 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
0278a905 BR |
1285 | if (!dev_info) { |
1286 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1287 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1288 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
0278a905 BR |
1289 | } else if (dev_info->state.created == 0) { |
1290 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1291 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1292 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
12e364b9 | 1293 | } |
0278a905 | 1294 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1295 | device_epilog(dev_info, state, |
0278a905 | 1296 | CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, |
4da3336c | 1297 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1298 | } |
1299 | ||
1300 | static void | |
3ab47701 | 1301 | my_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1302 | { |
2ea5117b | 1303 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1304 | u32 bus_no = cmd->destroy_device.bus_no; |
1305 | u32 dev_no = cmd->destroy_device.dev_no; | |
a298bc0b | 1306 | struct visor_device *dev_info; |
12e364b9 KC |
1307 | int rc = CONTROLVM_RESP_SUCCESS; |
1308 | ||
a298bc0b | 1309 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
61715c8b | 1310 | if (!dev_info) |
22ad57ba | 1311 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
61715c8b | 1312 | else if (dev_info->state.created == 0) |
22ad57ba | 1313 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1314 | |
61715c8b | 1315 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1316 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1317 | CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, |
4da3336c | 1318 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1319 | } |
1320 | ||
1321 | /* When provided with the physical address of the controlvm channel | |
1322 | * (phys_addr), the offset to the payload area we need to manage | |
1323 | * (offset), and the size of this payload area (bytes), fills in the | |
f4c11551 | 1324 | * controlvm_payload_info struct. Returns true for success or false |
12e364b9 KC |
1325 | * for failure. |
1326 | */ | |
1327 | static int | |
d5b3f1dc | 1328 | initialize_controlvm_payload_info(u64 phys_addr, u64 offset, u32 bytes, |
c1f834eb | 1329 | struct visor_controlvm_payload_info *info) |
12e364b9 | 1330 | { |
3103dc03 | 1331 | u8 *payload = NULL; |
12e364b9 KC |
1332 | int rc = CONTROLVM_RESP_SUCCESS; |
1333 | ||
38f736e9 | 1334 | if (!info) { |
22ad57ba | 1335 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1336 | goto cleanup; |
12e364b9 | 1337 | } |
c1f834eb | 1338 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 | 1339 | if ((offset == 0) || (bytes == 0)) { |
22ad57ba | 1340 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1341 | goto cleanup; |
12e364b9 | 1342 | } |
3103dc03 | 1343 | payload = memremap(phys_addr + offset, bytes, MEMREMAP_WB); |
38f736e9 | 1344 | if (!payload) { |
22ad57ba | 1345 | rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; |
f118a39b | 1346 | goto cleanup; |
12e364b9 KC |
1347 | } |
1348 | ||
1349 | info->offset = offset; | |
1350 | info->bytes = bytes; | |
1351 | info->ptr = payload; | |
12e364b9 | 1352 | |
f118a39b | 1353 | cleanup: |
12e364b9 | 1354 | if (rc < 0) { |
f118a39b | 1355 | if (payload) { |
3103dc03 | 1356 | memunmap(payload); |
12e364b9 KC |
1357 | payload = NULL; |
1358 | } | |
1359 | } | |
1360 | return rc; | |
1361 | } | |
1362 | ||
1363 | static void | |
c1f834eb | 1364 | destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info) |
12e364b9 | 1365 | { |
597c338f | 1366 | if (info->ptr) { |
3103dc03 | 1367 | memunmap(info->ptr); |
12e364b9 KC |
1368 | info->ptr = NULL; |
1369 | } | |
c1f834eb | 1370 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 KC |
1371 | } |
1372 | ||
1373 | static void | |
1374 | initialize_controlvm_payload(void) | |
1375 | { | |
d5b3f1dc | 1376 | u64 phys_addr = visorchannel_get_physaddr(controlvm_channel); |
cafefc0c BR |
1377 | u64 payload_offset = 0; |
1378 | u32 payload_bytes = 0; | |
26eb2c0c | 1379 | |
c3d9a224 | 1380 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1381 | offsetof(struct spar_controlvm_channel_protocol, |
1382 | request_payload_offset), | |
cafefc0c | 1383 | &payload_offset, sizeof(payload_offset)) < 0) { |
12e364b9 KC |
1384 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1385 | POSTCODE_SEVERITY_ERR); | |
1386 | return; | |
1387 | } | |
c3d9a224 | 1388 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1389 | offsetof(struct spar_controlvm_channel_protocol, |
1390 | request_payload_bytes), | |
cafefc0c | 1391 | &payload_bytes, sizeof(payload_bytes)) < 0) { |
12e364b9 KC |
1392 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1393 | POSTCODE_SEVERITY_ERR); | |
1394 | return; | |
1395 | } | |
1396 | initialize_controlvm_payload_info(phys_addr, | |
cafefc0c | 1397 | payload_offset, payload_bytes, |
84982fbf | 1398 | &controlvm_payload_info); |
12e364b9 KC |
1399 | } |
1400 | ||
1401 | /* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1402 | * Returns CONTROLVM_RESP_xxx code. | |
1403 | */ | |
d3368a58 | 1404 | static int |
12e364b9 KC |
1405 | visorchipset_chipset_ready(void) |
1406 | { | |
eb34e877 | 1407 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); |
12e364b9 KC |
1408 | return CONTROLVM_RESP_SUCCESS; |
1409 | } | |
12e364b9 | 1410 | |
d3368a58 | 1411 | static int |
12e364b9 KC |
1412 | visorchipset_chipset_selftest(void) |
1413 | { | |
1414 | char env_selftest[20]; | |
1415 | char *envp[] = { env_selftest, NULL }; | |
26eb2c0c | 1416 | |
12e364b9 | 1417 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); |
eb34e877 | 1418 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1419 | envp); |
1420 | return CONTROLVM_RESP_SUCCESS; | |
1421 | } | |
12e364b9 KC |
1422 | |
1423 | /* Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1424 | * Returns CONTROLVM_RESP_xxx code. | |
1425 | */ | |
d3368a58 | 1426 | static int |
12e364b9 KC |
1427 | visorchipset_chipset_notready(void) |
1428 | { | |
eb34e877 | 1429 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); |
12e364b9 KC |
1430 | return CONTROLVM_RESP_SUCCESS; |
1431 | } | |
12e364b9 KC |
1432 | |
1433 | static void | |
77a0449d | 1434 | chipset_ready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1435 | { |
1436 | int rc = visorchipset_chipset_ready(); | |
26eb2c0c | 1437 | |
12e364b9 KC |
1438 | if (rc != CONTROLVM_RESP_SUCCESS) |
1439 | rc = -rc; | |
77a0449d BR |
1440 | if (msg_hdr->flags.response_expected && !visorchipset_holdchipsetready) |
1441 | controlvm_respond(msg_hdr, rc); | |
1442 | if (msg_hdr->flags.response_expected && visorchipset_holdchipsetready) { | |
12e364b9 KC |
1443 | /* Send CHIPSET_READY response when all modules have been loaded |
1444 | * and disks mounted for the partition | |
1445 | */ | |
77a0449d | 1446 | g_chipset_msg_hdr = *msg_hdr; |
12e364b9 KC |
1447 | } |
1448 | } | |
1449 | ||
1450 | static void | |
77a0449d | 1451 | chipset_selftest(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1452 | { |
1453 | int rc = visorchipset_chipset_selftest(); | |
26eb2c0c | 1454 | |
12e364b9 KC |
1455 | if (rc != CONTROLVM_RESP_SUCCESS) |
1456 | rc = -rc; | |
77a0449d BR |
1457 | if (msg_hdr->flags.response_expected) |
1458 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1459 | } |
1460 | ||
1461 | static void | |
77a0449d | 1462 | chipset_notready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1463 | { |
1464 | int rc = visorchipset_chipset_notready(); | |
26eb2c0c | 1465 | |
12e364b9 KC |
1466 | if (rc != CONTROLVM_RESP_SUCCESS) |
1467 | rc = -rc; | |
77a0449d BR |
1468 | if (msg_hdr->flags.response_expected) |
1469 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1470 | } |
1471 | ||
1472 | /* This is your "one-stop" shop for grabbing the next message from the | |
1473 | * CONTROLVM_QUEUE_EVENT queue in the controlvm channel. | |
1474 | */ | |
f4c11551 | 1475 | static bool |
3ab47701 | 1476 | read_controlvm_event(struct controlvm_message *msg) |
12e364b9 | 1477 | { |
c3d9a224 | 1478 | if (visorchannel_signalremove(controlvm_channel, |
12e364b9 KC |
1479 | CONTROLVM_QUEUE_EVENT, msg)) { |
1480 | /* got a message */ | |
0aca7844 | 1481 | if (msg->hdr.flags.test_message == 1) |
f4c11551 JS |
1482 | return false; |
1483 | return true; | |
12e364b9 | 1484 | } |
f4c11551 | 1485 | return false; |
12e364b9 KC |
1486 | } |
1487 | ||
1488 | /* | |
1489 | * The general parahotplug flow works as follows. The visorchipset | |
1490 | * driver receives a DEVICE_CHANGESTATE message from Command | |
1491 | * specifying a physical device to enable or disable. The CONTROLVM | |
1492 | * message handler calls parahotplug_process_message, which then adds | |
1493 | * the message to a global list and kicks off a udev event which | |
1494 | * causes a user level script to enable or disable the specified | |
1495 | * device. The udev script then writes to | |
1496 | * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write | |
1497 | * to get called, at which point the appropriate CONTROLVM message is | |
1498 | * retrieved from the list and responded to. | |
1499 | */ | |
1500 | ||
1501 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
1502 | ||
1503 | /* | |
1504 | * Generate unique int to match an outstanding CONTROLVM message with a | |
1505 | * udev script /proc response | |
1506 | */ | |
1507 | static int | |
1508 | parahotplug_next_id(void) | |
1509 | { | |
1510 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 1511 | |
12e364b9 KC |
1512 | return atomic_inc_return(&id); |
1513 | } | |
1514 | ||
1515 | /* | |
1516 | * Returns the time (in jiffies) when a CONTROLVM message on the list | |
1517 | * should expire -- PARAHOTPLUG_TIMEOUT_MS in the future | |
1518 | */ | |
1519 | static unsigned long | |
1520 | parahotplug_next_expiration(void) | |
1521 | { | |
2cc1a1b3 | 1522 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
1523 | } |
1524 | ||
1525 | /* | |
1526 | * Create a parahotplug_request, which is basically a wrapper for a | |
1527 | * CONTROLVM_MESSAGE that we can stick on a list | |
1528 | */ | |
1529 | static struct parahotplug_request * | |
3ab47701 | 1530 | parahotplug_request_create(struct controlvm_message *msg) |
12e364b9 | 1531 | { |
ea0dcfcf QL |
1532 | struct parahotplug_request *req; |
1533 | ||
6a55e3c3 | 1534 | req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY); |
38f736e9 | 1535 | if (!req) |
12e364b9 KC |
1536 | return NULL; |
1537 | ||
1538 | req->id = parahotplug_next_id(); | |
1539 | req->expiration = parahotplug_next_expiration(); | |
1540 | req->msg = *msg; | |
1541 | ||
1542 | return req; | |
1543 | } | |
1544 | ||
1545 | /* | |
1546 | * Free a parahotplug_request. | |
1547 | */ | |
1548 | static void | |
1549 | parahotplug_request_destroy(struct parahotplug_request *req) | |
1550 | { | |
1551 | kfree(req); | |
1552 | } | |
1553 | ||
1554 | /* | |
1555 | * Cause uevent to run the user level script to do the disable/enable | |
1556 | * specified in (the CONTROLVM message in) the specified | |
1557 | * parahotplug_request | |
1558 | */ | |
1559 | static void | |
1560 | parahotplug_request_kickoff(struct parahotplug_request *req) | |
1561 | { | |
2ea5117b | 1562 | struct controlvm_message_packet *cmd = &req->msg.cmd; |
12e364b9 KC |
1563 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], |
1564 | env_func[40]; | |
1565 | char *envp[] = { | |
1566 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1567 | }; | |
1568 | ||
1569 | sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); | |
1570 | sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); | |
1571 | sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", | |
2ea5117b | 1572 | cmd->device_change_state.state.active); |
12e364b9 | 1573 | sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", |
2ea5117b | 1574 | cmd->device_change_state.bus_no); |
12e364b9 | 1575 | sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", |
2ea5117b | 1576 | cmd->device_change_state.dev_no >> 3); |
12e364b9 | 1577 | sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", |
2ea5117b | 1578 | cmd->device_change_state.dev_no & 0x7); |
12e364b9 | 1579 | |
eb34e877 | 1580 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1581 | envp); |
1582 | } | |
1583 | ||
1584 | /* | |
1585 | * Remove any request from the list that's been on there too long and | |
1586 | * respond with an error. | |
1587 | */ | |
1588 | static void | |
1589 | parahotplug_process_list(void) | |
1590 | { | |
e82ba62e JS |
1591 | struct list_head *pos; |
1592 | struct list_head *tmp; | |
12e364b9 | 1593 | |
ddf5de53 | 1594 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 | 1595 | |
ddf5de53 | 1596 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1597 | struct parahotplug_request *req = |
1598 | list_entry(pos, struct parahotplug_request, list); | |
55b33413 BR |
1599 | |
1600 | if (!time_after_eq(jiffies, req->expiration)) | |
1601 | continue; | |
1602 | ||
1603 | list_del(pos); | |
1604 | if (req->msg.hdr.flags.response_expected) | |
1605 | controlvm_respond_physdev_changestate( | |
1606 | &req->msg.hdr, | |
1607 | CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, | |
1608 | req->msg.cmd.device_change_state.state); | |
1609 | parahotplug_request_destroy(req); | |
12e364b9 KC |
1610 | } |
1611 | ||
ddf5de53 | 1612 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1613 | } |
1614 | ||
1615 | /* | |
1616 | * Called from the /proc handler, which means the user script has | |
1617 | * finished the enable/disable. Find the matching identifier, and | |
1618 | * respond to the CONTROLVM message with success. | |
1619 | */ | |
1620 | static int | |
b06bdf7d | 1621 | parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1622 | { |
e82ba62e JS |
1623 | struct list_head *pos; |
1624 | struct list_head *tmp; | |
12e364b9 | 1625 | |
ddf5de53 | 1626 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1627 | |
1628 | /* Look for a request matching "id". */ | |
ddf5de53 | 1629 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1630 | struct parahotplug_request *req = |
1631 | list_entry(pos, struct parahotplug_request, list); | |
1632 | if (req->id == id) { | |
1633 | /* Found a match. Remove it from the list and | |
1634 | * respond. | |
1635 | */ | |
1636 | list_del(pos); | |
ddf5de53 | 1637 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1638 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1639 | if (req->msg.hdr.flags.response_expected) |
12e364b9 KC |
1640 | controlvm_respond_physdev_changestate( |
1641 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
2ea5117b | 1642 | req->msg.cmd.device_change_state.state); |
12e364b9 KC |
1643 | parahotplug_request_destroy(req); |
1644 | return 0; | |
1645 | } | |
1646 | } | |
1647 | ||
ddf5de53 | 1648 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1649 | return -1; |
1650 | } | |
1651 | ||
1652 | /* | |
1653 | * Enables or disables a PCI device by kicking off a udev script | |
1654 | */ | |
bd5b9b32 | 1655 | static void |
3ab47701 | 1656 | parahotplug_process_message(struct controlvm_message *inmsg) |
12e364b9 KC |
1657 | { |
1658 | struct parahotplug_request *req; | |
1659 | ||
1660 | req = parahotplug_request_create(inmsg); | |
1661 | ||
38f736e9 | 1662 | if (!req) |
12e364b9 | 1663 | return; |
12e364b9 | 1664 | |
2ea5117b | 1665 | if (inmsg->cmd.device_change_state.state.active) { |
12e364b9 KC |
1666 | /* For enable messages, just respond with success |
1667 | * right away. This is a bit of a hack, but there are | |
1668 | * issues with the early enable messages we get (with | |
1669 | * either the udev script not detecting that the device | |
1670 | * is up, or not getting called at all). Fortunately | |
1671 | * the messages that get lost don't matter anyway, as | |
1672 | * devices are automatically enabled at | |
1673 | * initialization. | |
1674 | */ | |
1675 | parahotplug_request_kickoff(req); | |
1676 | controlvm_respond_physdev_changestate(&inmsg->hdr, | |
8e76e695 BR |
1677 | CONTROLVM_RESP_SUCCESS, |
1678 | inmsg->cmd.device_change_state.state); | |
12e364b9 KC |
1679 | parahotplug_request_destroy(req); |
1680 | } else { | |
1681 | /* For disable messages, add the request to the | |
1682 | * request list before kicking off the udev script. It | |
1683 | * won't get responded to until the script has | |
1684 | * indicated it's done. | |
1685 | */ | |
ddf5de53 BR |
1686 | spin_lock(¶hotplug_request_list_lock); |
1687 | list_add_tail(&req->list, ¶hotplug_request_list); | |
1688 | spin_unlock(¶hotplug_request_list_lock); | |
12e364b9 KC |
1689 | |
1690 | parahotplug_request_kickoff(req); | |
1691 | } | |
1692 | } | |
1693 | ||
12e364b9 KC |
1694 | /* Process a controlvm message. |
1695 | * Return result: | |
779d0752 | 1696 | * false - this function will return false only in the case where the |
12e364b9 KC |
1697 | * controlvm message was NOT processed, but processing must be |
1698 | * retried before reading the next controlvm message; a | |
1699 | * scenario where this can occur is when we need to throttle | |
1700 | * the allocation of memory in which to copy out controlvm | |
1701 | * payload data | |
f4c11551 | 1702 | * true - processing of the controlvm message completed, |
12e364b9 KC |
1703 | * either successfully or with an error. |
1704 | */ | |
f4c11551 | 1705 | static bool |
d5b3f1dc | 1706 | handle_command(struct controlvm_message inmsg, u64 channel_addr) |
12e364b9 | 1707 | { |
2ea5117b | 1708 | struct controlvm_message_packet *cmd = &inmsg.cmd; |
e82ba62e JS |
1709 | u64 parm_addr; |
1710 | u32 parm_bytes; | |
317d9614 | 1711 | struct parser_context *parser_ctx = NULL; |
e82ba62e | 1712 | bool local_addr; |
3ab47701 | 1713 | struct controlvm_message ackmsg; |
12e364b9 KC |
1714 | |
1715 | /* create parsing context if necessary */ | |
818352a8 | 1716 | local_addr = (inmsg.hdr.flags.test_message == 1); |
0aca7844 | 1717 | if (channel_addr == 0) |
f4c11551 | 1718 | return true; |
818352a8 BR |
1719 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; |
1720 | parm_bytes = inmsg.hdr.payload_bytes; | |
12e364b9 KC |
1721 | |
1722 | /* Parameter and channel addresses within test messages actually lie | |
1723 | * within our OS-controlled memory. We need to know that, because it | |
1724 | * makes a difference in how we compute the virtual address. | |
1725 | */ | |
ebec8967 | 1726 | if (parm_addr && parm_bytes) { |
f4c11551 | 1727 | bool retry = false; |
26eb2c0c | 1728 | |
12e364b9 | 1729 | parser_ctx = |
818352a8 BR |
1730 | parser_init_byte_stream(parm_addr, parm_bytes, |
1731 | local_addr, &retry); | |
1b08872e | 1732 | if (!parser_ctx && retry) |
f4c11551 | 1733 | return false; |
12e364b9 KC |
1734 | } |
1735 | ||
818352a8 | 1736 | if (!local_addr) { |
12e364b9 KC |
1737 | controlvm_init_response(&ackmsg, &inmsg.hdr, |
1738 | CONTROLVM_RESP_SUCCESS); | |
c3d9a224 BR |
1739 | if (controlvm_channel) |
1740 | visorchannel_signalinsert(controlvm_channel, | |
1b08872e BR |
1741 | CONTROLVM_QUEUE_ACK, |
1742 | &ackmsg); | |
12e364b9 | 1743 | } |
98d7b594 | 1744 | switch (inmsg.hdr.id) { |
12e364b9 | 1745 | case CONTROLVM_CHIPSET_INIT: |
12e364b9 KC |
1746 | chipset_init(&inmsg); |
1747 | break; | |
1748 | case CONTROLVM_BUS_CREATE: | |
12e364b9 KC |
1749 | bus_create(&inmsg); |
1750 | break; | |
1751 | case CONTROLVM_BUS_DESTROY: | |
12e364b9 KC |
1752 | bus_destroy(&inmsg); |
1753 | break; | |
1754 | case CONTROLVM_BUS_CONFIGURE: | |
12e364b9 KC |
1755 | bus_configure(&inmsg, parser_ctx); |
1756 | break; | |
1757 | case CONTROLVM_DEVICE_CREATE: | |
12e364b9 KC |
1758 | my_device_create(&inmsg); |
1759 | break; | |
1760 | case CONTROLVM_DEVICE_CHANGESTATE: | |
2ea5117b | 1761 | if (cmd->device_change_state.flags.phys_device) { |
12e364b9 KC |
1762 | parahotplug_process_message(&inmsg); |
1763 | } else { | |
12e364b9 KC |
1764 | /* save the hdr and cmd structures for later use */ |
1765 | /* when sending back the response to Command */ | |
1766 | my_device_changestate(&inmsg); | |
4f44b72d | 1767 | g_devicechangestate_packet = inmsg.cmd; |
12e364b9 KC |
1768 | break; |
1769 | } | |
1770 | break; | |
1771 | case CONTROLVM_DEVICE_DESTROY: | |
12e364b9 KC |
1772 | my_device_destroy(&inmsg); |
1773 | break; | |
1774 | case CONTROLVM_DEVICE_CONFIGURE: | |
12e364b9 | 1775 | /* no op for now, just send a respond that we passed */ |
98d7b594 | 1776 | if (inmsg.hdr.flags.response_expected) |
12e364b9 KC |
1777 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); |
1778 | break; | |
1779 | case CONTROLVM_CHIPSET_READY: | |
12e364b9 KC |
1780 | chipset_ready(&inmsg.hdr); |
1781 | break; | |
1782 | case CONTROLVM_CHIPSET_SELFTEST: | |
12e364b9 KC |
1783 | chipset_selftest(&inmsg.hdr); |
1784 | break; | |
1785 | case CONTROLVM_CHIPSET_STOP: | |
12e364b9 KC |
1786 | chipset_notready(&inmsg.hdr); |
1787 | break; | |
1788 | default: | |
98d7b594 | 1789 | if (inmsg.hdr.flags.response_expected) |
12e364b9 | 1790 | controlvm_respond(&inmsg.hdr, |
818352a8 | 1791 | -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); |
12e364b9 KC |
1792 | break; |
1793 | } | |
1794 | ||
38f736e9 | 1795 | if (parser_ctx) { |
12e364b9 KC |
1796 | parser_done(parser_ctx); |
1797 | parser_ctx = NULL; | |
1798 | } | |
f4c11551 | 1799 | return true; |
12e364b9 KC |
1800 | } |
1801 | ||
5f3a7e36 DK |
1802 | static inline unsigned int |
1803 | issue_vmcall_io_controlvm_addr(u64 *control_addr, u32 *control_bytes) | |
1804 | { | |
1805 | struct vmcall_io_controlvm_addr_params params; | |
1806 | int result = VMCALL_SUCCESS; | |
1807 | u64 physaddr; | |
1808 | ||
1809 | physaddr = virt_to_phys(¶ms); | |
1810 | ISSUE_IO_VMCALL(VMCALL_IO_CONTROLVM_ADDR, physaddr, result); | |
1811 | if (VMCALL_SUCCESSFUL(result)) { | |
1812 | *control_addr = params.address; | |
1813 | *control_bytes = params.channel_bytes; | |
1814 | } | |
1815 | return result; | |
1816 | } | |
1817 | ||
d5b3f1dc | 1818 | static u64 controlvm_get_channel_address(void) |
524b0b63 | 1819 | { |
5fc0229a | 1820 | u64 addr = 0; |
b3c55b13 | 1821 | u32 size = 0; |
524b0b63 | 1822 | |
0aca7844 | 1823 | if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) |
524b0b63 | 1824 | return 0; |
0aca7844 | 1825 | |
524b0b63 BR |
1826 | return addr; |
1827 | } | |
1828 | ||
12e364b9 KC |
1829 | static void |
1830 | controlvm_periodic_work(struct work_struct *work) | |
1831 | { | |
3ab47701 | 1832 | struct controlvm_message inmsg; |
f4c11551 JS |
1833 | bool got_command = false; |
1834 | bool handle_command_failed = false; | |
1c1ed292 | 1835 | static u64 poll_count; |
12e364b9 KC |
1836 | |
1837 | /* make sure visorbus server is registered for controlvm callbacks */ | |
4da3336c | 1838 | if (visorchipset_visorbusregwait && !visorbusregistered) |
1c1ed292 | 1839 | goto cleanup; |
12e364b9 | 1840 | |
1c1ed292 BR |
1841 | poll_count++; |
1842 | if (poll_count >= 250) | |
12e364b9 KC |
1843 | ; /* keep going */ |
1844 | else | |
1c1ed292 | 1845 | goto cleanup; |
12e364b9 KC |
1846 | |
1847 | /* Check events to determine if response to CHIPSET_READY | |
1848 | * should be sent | |
1849 | */ | |
0639ba67 BR |
1850 | if (visorchipset_holdchipsetready && |
1851 | (g_chipset_msg_hdr.id != CONTROLVM_INVALID)) { | |
12e364b9 | 1852 | if (check_chipset_events() == 1) { |
da021f02 | 1853 | controlvm_respond(&g_chipset_msg_hdr, 0); |
12e364b9 | 1854 | clear_chipset_events(); |
da021f02 | 1855 | memset(&g_chipset_msg_hdr, 0, |
98d7b594 | 1856 | sizeof(struct controlvm_message_header)); |
12e364b9 KC |
1857 | } |
1858 | } | |
1859 | ||
c3d9a224 | 1860 | while (visorchannel_signalremove(controlvm_channel, |
8a1182eb | 1861 | CONTROLVM_QUEUE_RESPONSE, |
c3d9a224 BR |
1862 | &inmsg)) |
1863 | ; | |
1c1ed292 | 1864 | if (!got_command) { |
7166ed19 | 1865 | if (controlvm_pending_msg_valid) { |
8a1182eb BR |
1866 | /* we throttled processing of a prior |
1867 | * msg, so try to process it again | |
1868 | * rather than reading a new one | |
1869 | */ | |
7166ed19 | 1870 | inmsg = controlvm_pending_msg; |
f4c11551 | 1871 | controlvm_pending_msg_valid = false; |
1c1ed292 | 1872 | got_command = true; |
75c1f8b7 | 1873 | } else { |
1c1ed292 | 1874 | got_command = read_controlvm_event(&inmsg); |
75c1f8b7 | 1875 | } |
8a1182eb | 1876 | } |
12e364b9 | 1877 | |
f4c11551 | 1878 | handle_command_failed = false; |
1c1ed292 | 1879 | while (got_command && (!handle_command_failed)) { |
b53e0e93 | 1880 | most_recent_message_jiffies = jiffies; |
8a1182eb BR |
1881 | if (handle_command(inmsg, |
1882 | visorchannel_get_physaddr | |
c3d9a224 | 1883 | (controlvm_channel))) |
1c1ed292 | 1884 | got_command = read_controlvm_event(&inmsg); |
8a1182eb BR |
1885 | else { |
1886 | /* this is a scenario where throttling | |
1887 | * is required, but probably NOT an | |
1888 | * error...; we stash the current | |
1889 | * controlvm msg so we will attempt to | |
1890 | * reprocess it on our next loop | |
1891 | */ | |
f4c11551 | 1892 | handle_command_failed = true; |
7166ed19 | 1893 | controlvm_pending_msg = inmsg; |
f4c11551 | 1894 | controlvm_pending_msg_valid = true; |
12e364b9 KC |
1895 | } |
1896 | } | |
1897 | ||
1898 | /* parahotplug_worker */ | |
1899 | parahotplug_process_list(); | |
1900 | ||
1c1ed292 | 1901 | cleanup: |
12e364b9 KC |
1902 | |
1903 | if (time_after(jiffies, | |
b53e0e93 | 1904 | most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { |
12e364b9 KC |
1905 | /* it's been longer than MIN_IDLE_SECONDS since we |
1906 | * processed our last controlvm message; slow down the | |
1907 | * polling | |
1908 | */ | |
911e213e BR |
1909 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) |
1910 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
12e364b9 | 1911 | } else { |
911e213e BR |
1912 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) |
1913 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
12e364b9 KC |
1914 | } |
1915 | ||
9232d2d6 BR |
1916 | queue_delayed_work(periodic_controlvm_workqueue, |
1917 | &periodic_controlvm_work, poll_jiffies); | |
12e364b9 KC |
1918 | } |
1919 | ||
1920 | static void | |
1921 | setup_crash_devices_work_queue(struct work_struct *work) | |
1922 | { | |
e6bdb904 BR |
1923 | struct controlvm_message local_crash_bus_msg; |
1924 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 1925 | struct controlvm_message msg; |
e6bdb904 BR |
1926 | u32 local_crash_msg_offset; |
1927 | u16 local_crash_msg_count; | |
12e364b9 | 1928 | |
4da3336c DK |
1929 | /* make sure visorbus is registered for controlvm callbacks */ |
1930 | if (visorchipset_visorbusregwait && !visorbusregistered) | |
e6bdb904 | 1931 | goto cleanup; |
12e364b9 KC |
1932 | |
1933 | POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
1934 | ||
1935 | /* send init chipset msg */ | |
98d7b594 | 1936 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
1937 | msg.cmd.init_chipset.bus_count = 23; |
1938 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
1939 | |
1940 | chipset_init(&msg); | |
1941 | ||
12e364b9 | 1942 | /* get saved message count */ |
c3d9a224 | 1943 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1944 | offsetof(struct spar_controlvm_channel_protocol, |
1945 | saved_crash_message_count), | |
e6bdb904 | 1946 | &local_crash_msg_count, sizeof(u16)) < 0) { |
12e364b9 KC |
1947 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
1948 | POSTCODE_SEVERITY_ERR); | |
1949 | return; | |
1950 | } | |
1951 | ||
e6bdb904 | 1952 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
12e364b9 | 1953 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
e6bdb904 | 1954 | local_crash_msg_count, |
12e364b9 KC |
1955 | POSTCODE_SEVERITY_ERR); |
1956 | return; | |
1957 | } | |
1958 | ||
1959 | /* get saved crash message offset */ | |
c3d9a224 | 1960 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1961 | offsetof(struct spar_controlvm_channel_protocol, |
1962 | saved_crash_message_offset), | |
e6bdb904 | 1963 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
12e364b9 KC |
1964 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
1965 | POSTCODE_SEVERITY_ERR); | |
1966 | return; | |
1967 | } | |
1968 | ||
1969 | /* read create device message for storage bus offset */ | |
c3d9a224 | 1970 | if (visorchannel_read(controlvm_channel, |
e6bdb904 BR |
1971 | local_crash_msg_offset, |
1972 | &local_crash_bus_msg, | |
3ab47701 | 1973 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
1974 | POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, |
1975 | POSTCODE_SEVERITY_ERR); | |
1976 | return; | |
1977 | } | |
1978 | ||
1979 | /* read create device message for storage device */ | |
c3d9a224 | 1980 | if (visorchannel_read(controlvm_channel, |
e6bdb904 | 1981 | local_crash_msg_offset + |
3ab47701 | 1982 | sizeof(struct controlvm_message), |
e6bdb904 | 1983 | &local_crash_dev_msg, |
3ab47701 | 1984 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
1985 | POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, |
1986 | POSTCODE_SEVERITY_ERR); | |
1987 | return; | |
1988 | } | |
1989 | ||
1990 | /* reuse IOVM create bus message */ | |
ebec8967 | 1991 | if (local_crash_bus_msg.cmd.create_bus.channel_addr) { |
e6bdb904 | 1992 | bus_create(&local_crash_bus_msg); |
75c1f8b7 | 1993 | } else { |
12e364b9 KC |
1994 | POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, |
1995 | POSTCODE_SEVERITY_ERR); | |
1996 | return; | |
1997 | } | |
1998 | ||
1999 | /* reuse create device message for storage device */ | |
ebec8967 | 2000 | if (local_crash_dev_msg.cmd.create_device.channel_addr) { |
e6bdb904 | 2001 | my_device_create(&local_crash_dev_msg); |
75c1f8b7 | 2002 | } else { |
12e364b9 KC |
2003 | POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, |
2004 | POSTCODE_SEVERITY_ERR); | |
2005 | return; | |
2006 | } | |
12e364b9 KC |
2007 | POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2008 | return; | |
2009 | ||
e6bdb904 | 2010 | cleanup: |
12e364b9 | 2011 | |
911e213e | 2012 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; |
12e364b9 | 2013 | |
9232d2d6 BR |
2014 | queue_delayed_work(periodic_controlvm_workqueue, |
2015 | &periodic_controlvm_work, poll_jiffies); | |
12e364b9 KC |
2016 | } |
2017 | ||
2018 | static void | |
d32517e3 | 2019 | bus_create_response(struct visor_device *bus_info, int response) |
12e364b9 | 2020 | { |
4b4fd43a | 2021 | if (response >= 0) |
0274b5ae | 2022 | bus_info->state.created = 1; |
0274b5ae DZ |
2023 | |
2024 | bus_responder(CONTROLVM_BUS_CREATE, bus_info->pending_msg_hdr, | |
2025 | response); | |
2026 | ||
2027 | kfree(bus_info->pending_msg_hdr); | |
2028 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
2029 | } |
2030 | ||
2031 | static void | |
d32517e3 | 2032 | bus_destroy_response(struct visor_device *bus_info, int response) |
12e364b9 | 2033 | { |
0274b5ae DZ |
2034 | bus_responder(CONTROLVM_BUS_DESTROY, bus_info->pending_msg_hdr, |
2035 | response); | |
2036 | ||
2037 | kfree(bus_info->pending_msg_hdr); | |
2038 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
2039 | } |
2040 | ||
2041 | static void | |
a298bc0b | 2042 | device_create_response(struct visor_device *dev_info, int response) |
12e364b9 | 2043 | { |
0274b5ae DZ |
2044 | if (response >= 0) |
2045 | dev_info->state.created = 1; | |
2046 | ||
2047 | device_responder(CONTROLVM_DEVICE_CREATE, dev_info->pending_msg_hdr, | |
2048 | response); | |
2049 | ||
2050 | kfree(dev_info->pending_msg_hdr); | |
addce19f | 2051 | dev_info->pending_msg_hdr = NULL; |
12e364b9 KC |
2052 | } |
2053 | ||
2054 | static void | |
a298bc0b | 2055 | device_destroy_response(struct visor_device *dev_info, int response) |
12e364b9 | 2056 | { |
0274b5ae DZ |
2057 | device_responder(CONTROLVM_DEVICE_DESTROY, dev_info->pending_msg_hdr, |
2058 | response); | |
2059 | ||
2060 | kfree(dev_info->pending_msg_hdr); | |
2061 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
2062 | } |
2063 | ||
d3368a58 | 2064 | static void |
a298bc0b | 2065 | visorchipset_device_pause_response(struct visor_device *dev_info, |
b4b598fd | 2066 | int response) |
12e364b9 | 2067 | { |
12e364b9 | 2068 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
b4b598fd | 2069 | dev_info, response, |
bd0d2dcc | 2070 | segment_state_standby); |
0274b5ae DZ |
2071 | |
2072 | kfree(dev_info->pending_msg_hdr); | |
2073 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 | 2074 | } |
12e364b9 KC |
2075 | |
2076 | static void | |
a298bc0b | 2077 | device_resume_response(struct visor_device *dev_info, int response) |
12e364b9 KC |
2078 | { |
2079 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
b4b598fd | 2080 | dev_info, response, |
bd0d2dcc | 2081 | segment_state_running); |
0274b5ae DZ |
2082 | |
2083 | kfree(dev_info->pending_msg_hdr); | |
2084 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
2085 | } |
2086 | ||
18b87ed1 | 2087 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
2088 | struct device_attribute *attr, |
2089 | const char *buf, size_t count) | |
12e364b9 | 2090 | { |
18b87ed1 | 2091 | char msgtype[64]; |
12e364b9 | 2092 | |
66e24b76 BR |
2093 | if (sscanf(buf, "%63s", msgtype) != 1) |
2094 | return -EINVAL; | |
2095 | ||
ebec8967 | 2096 | if (!strcmp(msgtype, "CALLHOMEDISK_MOUNTED")) { |
66e24b76 BR |
2097 | chipset_events[0] = 1; |
2098 | return count; | |
ebec8967 | 2099 | } else if (!strcmp(msgtype, "MODULES_LOADED")) { |
66e24b76 BR |
2100 | chipset_events[1] = 1; |
2101 | return count; | |
e22a4a0f BR |
2102 | } |
2103 | return -EINVAL; | |
12e364b9 KC |
2104 | } |
2105 | ||
e56fa7cd BR |
2106 | /* The parahotplug/devicedisabled interface gets called by our support script |
2107 | * when an SR-IOV device has been shut down. The ID is passed to the script | |
2108 | * and then passed back when the device has been removed. | |
2109 | */ | |
2110 | static ssize_t devicedisabled_store(struct device *dev, | |
8e76e695 BR |
2111 | struct device_attribute *attr, |
2112 | const char *buf, size_t count) | |
e56fa7cd | 2113 | { |
94217363 | 2114 | unsigned int id; |
e56fa7cd | 2115 | |
ebec8967 | 2116 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2117 | return -EINVAL; |
2118 | ||
2119 | parahotplug_request_complete(id, 0); | |
2120 | return count; | |
2121 | } | |
2122 | ||
2123 | /* The parahotplug/deviceenabled interface gets called by our support script | |
2124 | * when an SR-IOV device has been recovered. The ID is passed to the script | |
2125 | * and then passed back when the device has been brought back up. | |
2126 | */ | |
2127 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
2128 | struct device_attribute *attr, |
2129 | const char *buf, size_t count) | |
e56fa7cd | 2130 | { |
94217363 | 2131 | unsigned int id; |
e56fa7cd | 2132 | |
ebec8967 | 2133 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2134 | return -EINVAL; |
2135 | ||
2136 | parahotplug_request_complete(id, 1); | |
2137 | return count; | |
2138 | } | |
2139 | ||
e3420ed6 EA |
2140 | static int |
2141 | visorchipset_mmap(struct file *file, struct vm_area_struct *vma) | |
2142 | { | |
2143 | unsigned long physaddr = 0; | |
2144 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
780fcad3 | 2145 | u64 addr = 0; |
e3420ed6 EA |
2146 | |
2147 | /* sv_enable_dfp(); */ | |
2148 | if (offset & (PAGE_SIZE - 1)) | |
2149 | return -ENXIO; /* need aligned offsets */ | |
2150 | ||
2151 | switch (offset) { | |
2152 | case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: | |
2153 | vma->vm_flags |= VM_IO; | |
2154 | if (!*file_controlvm_channel) | |
2155 | return -ENXIO; | |
2156 | ||
2157 | visorchannel_read(*file_controlvm_channel, | |
2158 | offsetof(struct spar_controlvm_channel_protocol, | |
2159 | gp_control_channel), | |
2160 | &addr, sizeof(addr)); | |
2161 | if (!addr) | |
2162 | return -ENXIO; | |
2163 | ||
2164 | physaddr = (unsigned long)addr; | |
2165 | if (remap_pfn_range(vma, vma->vm_start, | |
2166 | physaddr >> PAGE_SHIFT, | |
2167 | vma->vm_end - vma->vm_start, | |
2168 | /*pgprot_noncached */ | |
2169 | (vma->vm_page_prot))) { | |
2170 | return -EAGAIN; | |
2171 | } | |
2172 | break; | |
2173 | default: | |
2174 | return -ENXIO; | |
2175 | } | |
2176 | return 0; | |
2177 | } | |
2178 | ||
5f3a7e36 DK |
2179 | static inline s64 issue_vmcall_query_guest_virtual_time_offset(void) |
2180 | { | |
2181 | u64 result = VMCALL_SUCCESS; | |
2182 | u64 physaddr = 0; | |
2183 | ||
2184 | ISSUE_IO_VMCALL(VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET, physaddr, | |
2185 | result); | |
2186 | return result; | |
2187 | } | |
2188 | ||
2189 | static inline int issue_vmcall_update_physical_time(u64 adjustment) | |
2190 | { | |
2191 | int result = VMCALL_SUCCESS; | |
2192 | ||
2193 | ISSUE_IO_VMCALL(VMCALL_UPDATE_PHYSICAL_TIME, adjustment, result); | |
2194 | return result; | |
2195 | } | |
2196 | ||
e3420ed6 EA |
2197 | static long visorchipset_ioctl(struct file *file, unsigned int cmd, |
2198 | unsigned long arg) | |
2199 | { | |
2200 | s64 adjustment; | |
2201 | s64 vrtc_offset; | |
2202 | ||
2203 | switch (cmd) { | |
2204 | case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: | |
2205 | /* get the physical rtc offset */ | |
2206 | vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); | |
2207 | if (copy_to_user((void __user *)arg, &vrtc_offset, | |
2208 | sizeof(vrtc_offset))) { | |
2209 | return -EFAULT; | |
2210 | } | |
d5b3f1dc | 2211 | return 0; |
e3420ed6 EA |
2212 | case VMCALL_UPDATE_PHYSICAL_TIME: |
2213 | if (copy_from_user(&adjustment, (void __user *)arg, | |
2214 | sizeof(adjustment))) { | |
2215 | return -EFAULT; | |
2216 | } | |
2217 | return issue_vmcall_update_physical_time(adjustment); | |
2218 | default: | |
2219 | return -EFAULT; | |
2220 | } | |
2221 | } | |
2222 | ||
2223 | static const struct file_operations visorchipset_fops = { | |
2224 | .owner = THIS_MODULE, | |
2225 | .open = visorchipset_open, | |
2226 | .read = NULL, | |
2227 | .write = NULL, | |
2228 | .unlocked_ioctl = visorchipset_ioctl, | |
2229 | .release = visorchipset_release, | |
2230 | .mmap = visorchipset_mmap, | |
2231 | }; | |
2232 | ||
0f570fc0 | 2233 | static int |
e3420ed6 EA |
2234 | visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) |
2235 | { | |
2236 | int rc = 0; | |
2237 | ||
2238 | file_controlvm_channel = controlvm_channel; | |
2239 | cdev_init(&file_cdev, &visorchipset_fops); | |
2240 | file_cdev.owner = THIS_MODULE; | |
2241 | if (MAJOR(major_dev) == 0) { | |
46168810 | 2242 | rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset"); |
e3420ed6 EA |
2243 | /* dynamic major device number registration required */ |
2244 | if (rc < 0) | |
2245 | return rc; | |
2246 | } else { | |
2247 | /* static major device number registration required */ | |
46168810 | 2248 | rc = register_chrdev_region(major_dev, 1, "visorchipset"); |
e3420ed6 EA |
2249 | if (rc < 0) |
2250 | return rc; | |
2251 | } | |
2252 | rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); | |
2253 | if (rc < 0) { | |
2254 | unregister_chrdev_region(major_dev, 1); | |
2255 | return rc; | |
2256 | } | |
2257 | return 0; | |
2258 | } | |
2259 | ||
55c67dca PB |
2260 | static int |
2261 | visorchipset_init(struct acpi_device *acpi_device) | |
12e364b9 | 2262 | { |
33078257 | 2263 | int rc = 0; |
d5b3f1dc | 2264 | u64 addr; |
d3368a58 JS |
2265 | int tmp_sz = sizeof(struct spar_controlvm_channel_protocol); |
2266 | uuid_le uuid = SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID; | |
2267 | ||
2268 | addr = controlvm_get_channel_address(); | |
2269 | if (!addr) | |
2270 | return -ENODEV; | |
12e364b9 | 2271 | |
4da3336c | 2272 | memset(&busdev_notifiers, 0, sizeof(busdev_notifiers)); |
84982fbf | 2273 | memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); |
12e364b9 | 2274 | |
d3368a58 JS |
2275 | controlvm_channel = visorchannel_create_with_lock(addr, tmp_sz, |
2276 | GFP_KERNEL, uuid); | |
2277 | if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( | |
2278 | visorchannel_get_header(controlvm_channel))) { | |
2279 | initialize_controlvm_payload(); | |
8a1182eb | 2280 | } else { |
d3368a58 JS |
2281 | visorchannel_destroy(controlvm_channel); |
2282 | controlvm_channel = NULL; | |
8a1182eb BR |
2283 | return -ENODEV; |
2284 | } | |
2285 | ||
5aa8ae57 BR |
2286 | major_dev = MKDEV(visorchipset_major, 0); |
2287 | rc = visorchipset_file_init(major_dev, &controlvm_channel); | |
4cb005a9 | 2288 | if (rc < 0) { |
4cb005a9 | 2289 | POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); |
a6a3989b | 2290 | goto cleanup; |
4cb005a9 | 2291 | } |
9f8d0e8b | 2292 | |
da021f02 | 2293 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2294 | |
4da3336c DK |
2295 | /* if booting in a crash kernel */ |
2296 | if (is_kdump_kernel()) | |
2297 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2298 | setup_crash_devices_work_queue); | |
2299 | else | |
2300 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2301 | controlvm_periodic_work); | |
2302 | periodic_controlvm_workqueue = | |
2303 | create_singlethread_workqueue("visorchipset_controlvm"); | |
2304 | ||
2305 | if (!periodic_controlvm_workqueue) { | |
2306 | POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC, | |
2307 | DIAG_SEVERITY_ERR); | |
2308 | rc = -ENOMEM; | |
2309 | goto cleanup; | |
2310 | } | |
2311 | most_recent_message_jiffies = jiffies; | |
2312 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
2313 | rc = queue_delayed_work(periodic_controlvm_workqueue, | |
2314 | &periodic_controlvm_work, poll_jiffies); | |
2315 | if (rc < 0) { | |
2316 | POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC, | |
2317 | DIAG_SEVERITY_ERR); | |
2318 | goto cleanup; | |
12e364b9 KC |
2319 | } |
2320 | ||
eb34e877 BR |
2321 | visorchipset_platform_device.dev.devt = major_dev; |
2322 | if (platform_device_register(&visorchipset_platform_device) < 0) { | |
4cb005a9 KC |
2323 | POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); |
2324 | rc = -1; | |
a6a3989b | 2325 | goto cleanup; |
4cb005a9 | 2326 | } |
12e364b9 | 2327 | POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); |
c79b28f7 PB |
2328 | |
2329 | rc = visorbus_init(); | |
a6a3989b | 2330 | cleanup: |
12e364b9 | 2331 | if (rc) { |
12e364b9 KC |
2332 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, |
2333 | POSTCODE_SEVERITY_ERR); | |
2334 | } | |
2335 | return rc; | |
2336 | } | |
2337 | ||
0f570fc0 | 2338 | static void |
e3420ed6 EA |
2339 | visorchipset_file_cleanup(dev_t major_dev) |
2340 | { | |
2341 | if (file_cdev.ops) | |
2342 | cdev_del(&file_cdev); | |
2343 | file_cdev.ops = NULL; | |
2344 | unregister_chrdev_region(major_dev, 1); | |
2345 | } | |
2346 | ||
55c67dca PB |
2347 | static int |
2348 | visorchipset_exit(struct acpi_device *acpi_device) | |
12e364b9 | 2349 | { |
12e364b9 KC |
2350 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2351 | ||
c79b28f7 PB |
2352 | visorbus_exit(); |
2353 | ||
4da3336c DK |
2354 | cancel_delayed_work(&periodic_controlvm_work); |
2355 | flush_workqueue(periodic_controlvm_workqueue); | |
2356 | destroy_workqueue(periodic_controlvm_workqueue); | |
2357 | periodic_controlvm_workqueue = NULL; | |
2358 | destroy_controlvm_payload_info(&controlvm_payload_info); | |
1783319f | 2359 | |
da021f02 | 2360 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2361 | |
c3d9a224 | 2362 | visorchannel_destroy(controlvm_channel); |
8a1182eb | 2363 | |
addceb12 | 2364 | visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); |
04dacacc | 2365 | platform_device_unregister(&visorchipset_platform_device); |
12e364b9 | 2366 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
55c67dca PB |
2367 | |
2368 | return 0; | |
2369 | } | |
2370 | ||
2371 | static const struct acpi_device_id unisys_device_ids[] = { | |
2372 | {"PNP0A07", 0}, | |
2373 | {"", 0}, | |
2374 | }; | |
55c67dca PB |
2375 | |
2376 | static struct acpi_driver unisys_acpi_driver = { | |
2377 | .name = "unisys_acpi", | |
2378 | .class = "unisys_acpi_class", | |
2379 | .owner = THIS_MODULE, | |
2380 | .ids = unisys_device_ids, | |
2381 | .ops = { | |
2382 | .add = visorchipset_init, | |
2383 | .remove = visorchipset_exit, | |
2384 | }, | |
2385 | }; | |
1fc07f99 DK |
2386 | |
2387 | MODULE_DEVICE_TABLE(acpi, unisys_device_ids); | |
2388 | ||
d5b3f1dc EA |
2389 | static __init uint32_t visorutil_spar_detect(void) |
2390 | { | |
2391 | unsigned int eax, ebx, ecx, edx; | |
2392 | ||
2393 | if (cpu_has_hypervisor) { | |
2394 | /* check the ID */ | |
2395 | cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx); | |
2396 | return (ebx == UNISYS_SPAR_ID_EBX) && | |
2397 | (ecx == UNISYS_SPAR_ID_ECX) && | |
2398 | (edx == UNISYS_SPAR_ID_EDX); | |
2399 | } else { | |
2400 | return 0; | |
2401 | } | |
2402 | } | |
55c67dca PB |
2403 | |
2404 | static int init_unisys(void) | |
2405 | { | |
2406 | int result; | |
35e606de | 2407 | |
d5b3f1dc | 2408 | if (!visorutil_spar_detect()) |
55c67dca PB |
2409 | return -ENODEV; |
2410 | ||
2411 | result = acpi_bus_register_driver(&unisys_acpi_driver); | |
2412 | if (result) | |
2413 | return -ENODEV; | |
2414 | ||
2415 | pr_info("Unisys Visorchipset Driver Loaded.\n"); | |
2416 | return 0; | |
2417 | }; | |
2418 | ||
2419 | static void exit_unisys(void) | |
2420 | { | |
2421 | acpi_bus_unregister_driver(&unisys_acpi_driver); | |
12e364b9 KC |
2422 | } |
2423 | ||
12e364b9 | 2424 | module_param_named(major, visorchipset_major, int, S_IRUGO); |
b615d628 JS |
2425 | MODULE_PARM_DESC(visorchipset_major, |
2426 | "major device number to use for the device node"); | |
4da3336c DK |
2427 | module_param_named(visorbusregwait, visorchipset_visorbusregwait, int, S_IRUGO); |
2428 | MODULE_PARM_DESC(visorchipset_visorbusreqwait, | |
12e364b9 | 2429 | "1 to have the module wait for the visor bus to register"); |
12e364b9 KC |
2430 | module_param_named(holdchipsetready, visorchipset_holdchipsetready, |
2431 | int, S_IRUGO); | |
2432 | MODULE_PARM_DESC(visorchipset_holdchipsetready, | |
2433 | "1 to hold response to CHIPSET_READY"); | |
b615d628 | 2434 | |
55c67dca PB |
2435 | module_init(init_unisys); |
2436 | module_exit(exit_unisys); | |
12e364b9 KC |
2437 | |
2438 | MODULE_AUTHOR("Unisys"); | |
2439 | MODULE_LICENSE("GPL"); | |
2440 | MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " | |
2441 | VERSION); | |
2442 | MODULE_VERSION(VERSION); |