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 | ||
2c7e1d4e | 46 | #define MAX_CONTROLVM_PAYLOAD_BYTES (1024 * 128) |
2ee0deec PB |
47 | |
48 | #define VISORCHIPSET_MMAP_CONTROLCHANOFFSET 0x00000000 | |
49 | ||
d5b3f1dc EA |
50 | #define UNISYS_SPAR_LEAF_ID 0x40000000 |
51 | ||
52 | /* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ | |
53 | #define UNISYS_SPAR_ID_EBX 0x73696e55 | |
54 | #define UNISYS_SPAR_ID_ECX 0x70537379 | |
55 | #define UNISYS_SPAR_ID_EDX 0x34367261 | |
56 | ||
b615d628 JS |
57 | /* |
58 | * Module parameters | |
59 | */ | |
b615d628 | 60 | static int visorchipset_major; |
4da3336c | 61 | static int visorchipset_visorbusregwait = 1; /* default is on */ |
b615d628 | 62 | static int visorchipset_holdchipsetready; |
46168810 | 63 | static unsigned long controlvm_payload_bytes_buffered; |
12c957dc | 64 | static u32 dump_vhba_bus; |
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 | 88 | static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
2ee0d052 EA |
89 | /* when we got our last controlvm message */ |
90 | static unsigned long most_recent_message_jiffies; | |
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 | 105 | static struct delayed_work periodic_controlvm_work; |
8f1947ac | 106 | static DEFINE_SEMAPHORE(notifier_lock); |
12e364b9 | 107 | |
e3420ed6 EA |
108 | static struct cdev file_cdev; |
109 | static struct visorchannel **file_controlvm_channel; | |
da021f02 | 110 | static struct controlvm_message_header g_chipset_msg_hdr; |
4f44b72d | 111 | static struct controlvm_message_packet g_devicechangestate_packet; |
12e364b9 | 112 | |
1390b88c BR |
113 | static LIST_HEAD(bus_info_list); |
114 | static LIST_HEAD(dev_info_list); | |
12e364b9 | 115 | |
c3d9a224 | 116 | static struct visorchannel *controlvm_channel; |
12e364b9 | 117 | |
84982fbf | 118 | /* Manages the request payload in the controlvm channel */ |
c1f834eb | 119 | struct visor_controlvm_payload_info { |
3103dc03 | 120 | u8 *ptr; /* pointer to base address of payload pool */ |
5fc0229a | 121 | u64 offset; /* offset from beginning of controlvm |
2ee0d052 EA |
122 | * channel to beginning of payload * pool |
123 | */ | |
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 | |
2ee0d052 EA |
187 | * consuming these buffers to write as file data |
188 | */ | |
12e364b9 KC |
189 | struct list_head input_buffer_list; |
190 | spinlock_t req_list_lock; /* lock for input_buffer_list */ | |
191 | ||
192 | /* waiters for input_buffer_list to go non-empty */ | |
193 | wait_queue_head_t input_buffer_wq; | |
194 | ||
195 | /* data not yet read within current putfile_buffer_entry */ | |
196 | struct putfile_active_buffer active_buf; | |
197 | ||
198 | /* <0 = failed, 0 = in-progress, >0 = successful; */ | |
199 | /* note that this must be set with req_list_lock, and if you set <0, */ | |
200 | /* it is your responsibility to also free up all of the other objects */ | |
201 | /* in this struct (like input_buffer_list, active_buf.parser_ctx) */ | |
202 | /* before releasing the lock */ | |
203 | int completion_status; | |
204 | }; | |
205 | ||
12e364b9 KC |
206 | struct parahotplug_request { |
207 | struct list_head list; | |
208 | int id; | |
209 | unsigned long expiration; | |
3ab47701 | 210 | struct controlvm_message msg; |
12e364b9 KC |
211 | }; |
212 | ||
ddf5de53 BR |
213 | static LIST_HEAD(parahotplug_request_list); |
214 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ | |
12e364b9 KC |
215 | static void parahotplug_process_list(void); |
216 | ||
217 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / | |
218 | * CONTROLVM_REPORTEVENT. | |
219 | */ | |
4da3336c | 220 | static struct visorchipset_busdev_notifiers busdev_notifiers; |
12e364b9 | 221 | |
d32517e3 DZ |
222 | static void bus_create_response(struct visor_device *p, int response); |
223 | static void bus_destroy_response(struct visor_device *p, int response); | |
a298bc0b DZ |
224 | static void device_create_response(struct visor_device *p, int response); |
225 | static void device_destroy_response(struct visor_device *p, int response); | |
226 | static void device_resume_response(struct visor_device *p, int response); | |
12e364b9 | 227 | |
a298bc0b DZ |
228 | static void visorchipset_device_pause_response(struct visor_device *p, |
229 | int response); | |
2ee0deec | 230 | |
8e3fedd6 | 231 | static struct visorchipset_busdev_responders busdev_responders = { |
12e364b9 KC |
232 | .bus_create = bus_create_response, |
233 | .bus_destroy = bus_destroy_response, | |
234 | .device_create = device_create_response, | |
235 | .device_destroy = device_destroy_response, | |
927c7927 | 236 | .device_pause = visorchipset_device_pause_response, |
12e364b9 KC |
237 | .device_resume = device_resume_response, |
238 | }; | |
239 | ||
240 | /* info for /dev/visorchipset */ | |
5aa8ae57 | 241 | static dev_t major_dev = -1; /**< indicates major num for device */ |
12e364b9 | 242 | |
19f6634f BR |
243 | /* prototypes for attributes */ |
244 | static ssize_t toolaction_show(struct device *dev, | |
8e76e695 | 245 | struct device_attribute *attr, char *buf); |
19f6634f | 246 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 BR |
247 | struct device_attribute *attr, |
248 | const char *buf, size_t count); | |
19f6634f BR |
249 | static DEVICE_ATTR_RW(toolaction); |
250 | ||
54b31229 | 251 | static ssize_t boottotool_show(struct device *dev, |
8e76e695 | 252 | struct device_attribute *attr, char *buf); |
54b31229 | 253 | static ssize_t boottotool_store(struct device *dev, |
8e76e695 BR |
254 | struct device_attribute *attr, const char *buf, |
255 | size_t count); | |
54b31229 BR |
256 | static DEVICE_ATTR_RW(boottotool); |
257 | ||
422af17c | 258 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8e76e695 | 259 | char *buf); |
422af17c | 260 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 261 | const char *buf, size_t count); |
422af17c BR |
262 | static DEVICE_ATTR_RW(error); |
263 | ||
264 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 265 | char *buf); |
422af17c | 266 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 267 | const char *buf, size_t count); |
422af17c BR |
268 | static DEVICE_ATTR_RW(textid); |
269 | ||
270 | static ssize_t remaining_steps_show(struct device *dev, | |
8e76e695 | 271 | struct device_attribute *attr, char *buf); |
422af17c | 272 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 BR |
273 | struct device_attribute *attr, |
274 | const char *buf, size_t count); | |
422af17c BR |
275 | static DEVICE_ATTR_RW(remaining_steps); |
276 | ||
18b87ed1 | 277 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
278 | struct device_attribute *attr, |
279 | const char *buf, size_t count); | |
18b87ed1 BR |
280 | static DEVICE_ATTR_WO(chipsetready); |
281 | ||
e56fa7cd | 282 | static ssize_t devicedisabled_store(struct device *dev, |
8e76e695 BR |
283 | struct device_attribute *attr, |
284 | const char *buf, size_t count); | |
e56fa7cd BR |
285 | static DEVICE_ATTR_WO(devicedisabled); |
286 | ||
287 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
288 | struct device_attribute *attr, |
289 | const char *buf, size_t count); | |
e56fa7cd BR |
290 | static DEVICE_ATTR_WO(deviceenabled); |
291 | ||
19f6634f BR |
292 | static struct attribute *visorchipset_install_attrs[] = { |
293 | &dev_attr_toolaction.attr, | |
54b31229 | 294 | &dev_attr_boottotool.attr, |
422af17c BR |
295 | &dev_attr_error.attr, |
296 | &dev_attr_textid.attr, | |
297 | &dev_attr_remaining_steps.attr, | |
19f6634f BR |
298 | NULL |
299 | }; | |
300 | ||
301 | static struct attribute_group visorchipset_install_group = { | |
302 | .name = "install", | |
303 | .attrs = visorchipset_install_attrs | |
304 | }; | |
305 | ||
18b87ed1 BR |
306 | static struct attribute *visorchipset_guest_attrs[] = { |
307 | &dev_attr_chipsetready.attr, | |
308 | NULL | |
309 | }; | |
310 | ||
311 | static struct attribute_group visorchipset_guest_group = { | |
312 | .name = "guest", | |
313 | .attrs = visorchipset_guest_attrs | |
314 | }; | |
315 | ||
e56fa7cd BR |
316 | static struct attribute *visorchipset_parahotplug_attrs[] = { |
317 | &dev_attr_devicedisabled.attr, | |
318 | &dev_attr_deviceenabled.attr, | |
319 | NULL | |
320 | }; | |
321 | ||
322 | static struct attribute_group visorchipset_parahotplug_group = { | |
323 | .name = "parahotplug", | |
324 | .attrs = visorchipset_parahotplug_attrs | |
325 | }; | |
326 | ||
19f6634f BR |
327 | static const struct attribute_group *visorchipset_dev_groups[] = { |
328 | &visorchipset_install_group, | |
18b87ed1 | 329 | &visorchipset_guest_group, |
e56fa7cd | 330 | &visorchipset_parahotplug_group, |
19f6634f BR |
331 | NULL |
332 | }; | |
333 | ||
04dacacc DZ |
334 | static void visorchipset_dev_release(struct device *dev) |
335 | { | |
336 | } | |
337 | ||
12e364b9 | 338 | /* /sys/devices/platform/visorchipset */ |
eb34e877 | 339 | static struct platform_device visorchipset_platform_device = { |
12e364b9 KC |
340 | .name = "visorchipset", |
341 | .id = -1, | |
19f6634f | 342 | .dev.groups = visorchipset_dev_groups, |
04dacacc | 343 | .dev.release = visorchipset_dev_release, |
12e364b9 KC |
344 | }; |
345 | ||
346 | /* Function prototypes */ | |
b3168c70 | 347 | static void controlvm_respond(struct controlvm_message_header *msg_hdr, |
98d7b594 BR |
348 | int response); |
349 | static void controlvm_respond_chipset_init( | |
b3168c70 | 350 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 BR |
351 | enum ultra_chipset_feature features); |
352 | static void controlvm_respond_physdev_changestate( | |
b3168c70 | 353 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 354 | struct spar_segment_state state); |
12e364b9 | 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 | } | |
8c395e74 | 380 | ctx = kzalloc(allocbytes, GFP_KERNEL | __GFP_NORETRY); |
46168810 EA |
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 | } | |
0e7bf2f4 | 400 | p = __va((unsigned long)(addr)); |
46168810 EA |
401 | memcpy(ctx->data, p, bytes); |
402 | } else { | |
a8deaef3 | 403 | void *mapping = memremap(addr, bytes, MEMREMAP_WB); |
dd412751 | 404 | |
dd412751 | 405 | if (!mapping) { |
46168810 EA |
406 | rc = NULL; |
407 | goto cleanup; | |
408 | } | |
3103dc03 | 409 | memcpy(ctx->data, mapping, bytes); |
3103dc03 | 410 | memunmap(mapping); |
46168810 | 411 | } |
46168810 | 412 | |
cc55b5c5 | 413 | ctx->byte_stream = true; |
46168810 EA |
414 | rc = ctx; |
415 | cleanup: | |
46168810 EA |
416 | if (rc) { |
417 | controlvm_payload_bytes_buffered += ctx->param_bytes; | |
418 | } else { | |
419 | if (ctx) { | |
420 | parser_done(ctx); | |
421 | ctx = NULL; | |
422 | } | |
423 | } | |
424 | return rc; | |
425 | } | |
426 | ||
464129ed | 427 | static uuid_le |
46168810 EA |
428 | parser_id_get(struct parser_context *ctx) |
429 | { | |
430 | struct spar_controlvm_parameters_header *phdr = NULL; | |
431 | ||
e4a3dd33 | 432 | if (!ctx) |
46168810 EA |
433 | return NULL_UUID_LE; |
434 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
435 | return phdr->id; | |
436 | } | |
437 | ||
2ee0deec PB |
438 | /** Describes the state from the perspective of which controlvm messages have |
439 | * been received for a bus or device. | |
440 | */ | |
441 | ||
442 | enum PARSER_WHICH_STRING { | |
443 | PARSERSTRING_INITIATOR, | |
444 | PARSERSTRING_TARGET, | |
445 | PARSERSTRING_CONNECTION, | |
446 | PARSERSTRING_NAME, /* TODO: only PARSERSTRING_NAME is used ? */ | |
447 | }; | |
448 | ||
464129ed | 449 | static void |
2ee0deec PB |
450 | parser_param_start(struct parser_context *ctx, |
451 | enum PARSER_WHICH_STRING which_string) | |
46168810 EA |
452 | { |
453 | struct spar_controlvm_parameters_header *phdr = NULL; | |
454 | ||
e4a3dd33 | 455 | if (!ctx) |
b4d4dfbc BR |
456 | return; |
457 | ||
46168810 EA |
458 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); |
459 | switch (which_string) { | |
460 | case PARSERSTRING_INITIATOR: | |
461 | ctx->curr = ctx->data + phdr->initiator_offset; | |
462 | ctx->bytes_remaining = phdr->initiator_length; | |
463 | break; | |
464 | case PARSERSTRING_TARGET: | |
465 | ctx->curr = ctx->data + phdr->target_offset; | |
466 | ctx->bytes_remaining = phdr->target_length; | |
467 | break; | |
468 | case PARSERSTRING_CONNECTION: | |
469 | ctx->curr = ctx->data + phdr->connection_offset; | |
470 | ctx->bytes_remaining = phdr->connection_length; | |
471 | break; | |
472 | case PARSERSTRING_NAME: | |
473 | ctx->curr = ctx->data + phdr->name_offset; | |
474 | ctx->bytes_remaining = phdr->name_length; | |
475 | break; | |
476 | default: | |
477 | break; | |
478 | } | |
46168810 EA |
479 | } |
480 | ||
464129ed | 481 | static void parser_done(struct parser_context *ctx) |
46168810 EA |
482 | { |
483 | if (!ctx) | |
484 | return; | |
485 | controlvm_payload_bytes_buffered -= ctx->param_bytes; | |
486 | kfree(ctx); | |
487 | } | |
488 | ||
464129ed | 489 | static void * |
46168810 EA |
490 | parser_string_get(struct parser_context *ctx) |
491 | { | |
492 | u8 *pscan; | |
493 | unsigned long nscan; | |
494 | int value_length = -1; | |
495 | void *value = NULL; | |
496 | int i; | |
497 | ||
498 | if (!ctx) | |
499 | return NULL; | |
500 | pscan = ctx->curr; | |
501 | nscan = ctx->bytes_remaining; | |
502 | if (nscan == 0) | |
503 | return NULL; | |
504 | if (!pscan) | |
505 | return NULL; | |
506 | for (i = 0, value_length = -1; i < nscan; i++) | |
507 | if (pscan[i] == '\0') { | |
508 | value_length = i; | |
509 | break; | |
510 | } | |
511 | if (value_length < 0) /* '\0' was not included in the length */ | |
512 | value_length = nscan; | |
8c395e74 | 513 | value = kmalloc(value_length + 1, GFP_KERNEL | __GFP_NORETRY); |
e4a3dd33 | 514 | if (!value) |
46168810 EA |
515 | return NULL; |
516 | if (value_length > 0) | |
517 | memcpy(value, pscan, value_length); | |
0e7bf2f4 | 518 | ((u8 *)(value))[value_length] = '\0'; |
46168810 EA |
519 | return value; |
520 | } | |
521 | ||
d746cb55 VB |
522 | static ssize_t toolaction_show(struct device *dev, |
523 | struct device_attribute *attr, | |
524 | char *buf) | |
19f6634f | 525 | { |
01f4d85a | 526 | u8 tool_action; |
19f6634f | 527 | |
c3d9a224 | 528 | visorchannel_read(controlvm_channel, |
6bb871b6 BR |
529 | offsetof(struct spar_controlvm_channel_protocol, |
530 | tool_action), &tool_action, sizeof(u8)); | |
01f4d85a | 531 | return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action); |
19f6634f BR |
532 | } |
533 | ||
d746cb55 VB |
534 | static ssize_t toolaction_store(struct device *dev, |
535 | struct device_attribute *attr, | |
536 | const char *buf, size_t count) | |
19f6634f | 537 | { |
01f4d85a | 538 | u8 tool_action; |
66e24b76 | 539 | int ret; |
19f6634f | 540 | |
ebec8967 | 541 | if (kstrtou8(buf, 10, &tool_action)) |
66e24b76 BR |
542 | return -EINVAL; |
543 | ||
c3d9a224 | 544 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
545 | offsetof(struct spar_controlvm_channel_protocol, |
546 | tool_action), | |
01f4d85a | 547 | &tool_action, sizeof(u8)); |
66e24b76 BR |
548 | |
549 | if (ret) | |
550 | return ret; | |
e22a4a0f | 551 | return count; |
19f6634f BR |
552 | } |
553 | ||
d746cb55 VB |
554 | static ssize_t boottotool_show(struct device *dev, |
555 | struct device_attribute *attr, | |
556 | char *buf) | |
54b31229 | 557 | { |
365522d9 | 558 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 559 | |
c3d9a224 | 560 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
561 | offsetof(struct spar_controlvm_channel_protocol, |
562 | efi_spar_ind), &efi_spar_indication, | |
563 | sizeof(struct efi_spar_indication)); | |
54b31229 | 564 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
8e76e695 | 565 | efi_spar_indication.boot_to_tool); |
54b31229 BR |
566 | } |
567 | ||
d746cb55 VB |
568 | static ssize_t boottotool_store(struct device *dev, |
569 | struct device_attribute *attr, | |
570 | const char *buf, size_t count) | |
54b31229 | 571 | { |
66e24b76 | 572 | int val, ret; |
365522d9 | 573 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 574 | |
ebec8967 | 575 | if (kstrtoint(buf, 10, &val)) |
66e24b76 BR |
576 | return -EINVAL; |
577 | ||
365522d9 | 578 | efi_spar_indication.boot_to_tool = val; |
c3d9a224 | 579 | ret = visorchannel_write(controlvm_channel, |
d19642f6 | 580 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 BR |
581 | efi_spar_ind), &(efi_spar_indication), |
582 | sizeof(struct efi_spar_indication)); | |
66e24b76 BR |
583 | |
584 | if (ret) | |
585 | return ret; | |
e22a4a0f | 586 | return count; |
54b31229 | 587 | } |
422af17c BR |
588 | |
589 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 590 | char *buf) |
422af17c BR |
591 | { |
592 | u32 error; | |
593 | ||
8e76e695 BR |
594 | visorchannel_read(controlvm_channel, |
595 | offsetof(struct spar_controlvm_channel_protocol, | |
596 | installation_error), | |
597 | &error, sizeof(u32)); | |
422af17c BR |
598 | return scnprintf(buf, PAGE_SIZE, "%i\n", error); |
599 | } | |
600 | ||
601 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 602 | const char *buf, size_t count) |
422af17c BR |
603 | { |
604 | u32 error; | |
66e24b76 | 605 | int ret; |
422af17c | 606 | |
ebec8967 | 607 | if (kstrtou32(buf, 10, &error)) |
66e24b76 BR |
608 | return -EINVAL; |
609 | ||
c3d9a224 | 610 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
611 | offsetof(struct spar_controlvm_channel_protocol, |
612 | installation_error), | |
613 | &error, sizeof(u32)); | |
66e24b76 BR |
614 | if (ret) |
615 | return ret; | |
e22a4a0f | 616 | return count; |
422af17c BR |
617 | } |
618 | ||
619 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 620 | char *buf) |
422af17c | 621 | { |
10dbf0e3 | 622 | u32 text_id; |
422af17c | 623 | |
8e76e695 BR |
624 | visorchannel_read(controlvm_channel, |
625 | offsetof(struct spar_controlvm_channel_protocol, | |
626 | installation_text_id), | |
627 | &text_id, sizeof(u32)); | |
10dbf0e3 | 628 | return scnprintf(buf, PAGE_SIZE, "%i\n", text_id); |
422af17c BR |
629 | } |
630 | ||
631 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 632 | const char *buf, size_t count) |
422af17c | 633 | { |
10dbf0e3 | 634 | u32 text_id; |
66e24b76 | 635 | int ret; |
422af17c | 636 | |
ebec8967 | 637 | if (kstrtou32(buf, 10, &text_id)) |
66e24b76 BR |
638 | return -EINVAL; |
639 | ||
c3d9a224 | 640 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
641 | offsetof(struct spar_controlvm_channel_protocol, |
642 | installation_text_id), | |
643 | &text_id, sizeof(u32)); | |
66e24b76 BR |
644 | if (ret) |
645 | return ret; | |
e22a4a0f | 646 | return count; |
422af17c BR |
647 | } |
648 | ||
422af17c | 649 | static ssize_t remaining_steps_show(struct device *dev, |
8e76e695 | 650 | struct device_attribute *attr, char *buf) |
422af17c | 651 | { |
ee8da290 | 652 | u16 remaining_steps; |
422af17c | 653 | |
c3d9a224 | 654 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
655 | offsetof(struct spar_controlvm_channel_protocol, |
656 | installation_remaining_steps), | |
657 | &remaining_steps, sizeof(u16)); | |
ee8da290 | 658 | return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps); |
422af17c BR |
659 | } |
660 | ||
661 | static ssize_t remaining_steps_store(struct device *dev, | |
8e76e695 BR |
662 | struct device_attribute *attr, |
663 | const char *buf, size_t count) | |
422af17c | 664 | { |
ee8da290 | 665 | u16 remaining_steps; |
66e24b76 | 666 | int ret; |
422af17c | 667 | |
ebec8967 | 668 | if (kstrtou16(buf, 10, &remaining_steps)) |
66e24b76 BR |
669 | return -EINVAL; |
670 | ||
c3d9a224 | 671 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
672 | offsetof(struct spar_controlvm_channel_protocol, |
673 | installation_remaining_steps), | |
674 | &remaining_steps, sizeof(u16)); | |
66e24b76 BR |
675 | if (ret) |
676 | return ret; | |
e22a4a0f | 677 | return count; |
422af17c BR |
678 | } |
679 | ||
ab0592b9 DZ |
680 | struct visor_busdev { |
681 | u32 bus_no; | |
682 | u32 dev_no; | |
683 | }; | |
684 | ||
685 | static int match_visorbus_dev_by_id(struct device *dev, void *data) | |
686 | { | |
687 | struct visor_device *vdev = to_visor_device(dev); | |
7f44582e | 688 | struct visor_busdev *id = data; |
ab0592b9 DZ |
689 | u32 bus_no = id->bus_no; |
690 | u32 dev_no = id->dev_no; | |
691 | ||
65bd6e46 DZ |
692 | if ((vdev->chipset_bus_no == bus_no) && |
693 | (vdev->chipset_dev_no == dev_no)) | |
ab0592b9 DZ |
694 | return 1; |
695 | ||
696 | return 0; | |
697 | } | |
d1e08637 | 698 | |
ab0592b9 DZ |
699 | struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, |
700 | struct visor_device *from) | |
701 | { | |
702 | struct device *dev; | |
703 | struct device *dev_start = NULL; | |
704 | struct visor_device *vdev = NULL; | |
705 | struct visor_busdev id = { | |
706 | .bus_no = bus_no, | |
707 | .dev_no = dev_no | |
708 | }; | |
709 | ||
710 | if (from) | |
711 | dev_start = &from->device; | |
712 | dev = bus_find_device(&visorbus_type, dev_start, (void *)&id, | |
713 | match_visorbus_dev_by_id); | |
714 | if (dev) | |
715 | vdev = to_visor_device(dev); | |
716 | return vdev; | |
717 | } | |
718 | EXPORT_SYMBOL(visorbus_get_device_by_id); | |
719 | ||
c242233e | 720 | static u8 |
12e364b9 KC |
721 | check_chipset_events(void) |
722 | { | |
723 | int i; | |
c242233e | 724 | u8 send_msg = 1; |
12e364b9 KC |
725 | /* Check events to determine if response should be sent */ |
726 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
727 | send_msg &= chipset_events[i]; | |
728 | return send_msg; | |
729 | } | |
730 | ||
731 | static void | |
732 | clear_chipset_events(void) | |
733 | { | |
734 | int i; | |
735 | /* Clear chipset_events */ | |
736 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
737 | chipset_events[i] = 0; | |
738 | } | |
739 | ||
740 | void | |
4da3336c | 741 | visorchipset_register_busdev( |
fe90d892 | 742 | struct visorchipset_busdev_notifiers *notifiers, |
929aa8ae | 743 | struct visorchipset_busdev_responders *responders, |
1e7a59c1 | 744 | struct ultra_vbus_deviceinfo *driver_info) |
12e364b9 | 745 | { |
8f1947ac | 746 | down(¬ifier_lock); |
38f736e9 | 747 | if (!notifiers) { |
4da3336c DK |
748 | memset(&busdev_notifiers, 0, |
749 | sizeof(busdev_notifiers)); | |
750 | visorbusregistered = 0; /* clear flag */ | |
12e364b9 | 751 | } else { |
4da3336c DK |
752 | busdev_notifiers = *notifiers; |
753 | visorbusregistered = 1; /* set flag */ | |
12e364b9 KC |
754 | } |
755 | if (responders) | |
8e3fedd6 | 756 | *responders = busdev_responders; |
1e7a59c1 BR |
757 | if (driver_info) |
758 | bus_device_info_init(driver_info, "chipset", "visorchipset", | |
8e76e695 | 759 | VERSION, NULL); |
12e364b9 | 760 | |
8f1947ac | 761 | up(¬ifier_lock); |
12e364b9 | 762 | } |
4da3336c | 763 | EXPORT_SYMBOL_GPL(visorchipset_register_busdev); |
12e364b9 | 764 | |
12e364b9 | 765 | static void |
3ab47701 | 766 | chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
767 | { |
768 | static int chipset_inited; | |
b9b141e8 | 769 | enum ultra_chipset_feature features = 0; |
12e364b9 KC |
770 | int rc = CONTROLVM_RESP_SUCCESS; |
771 | ||
772 | POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
773 | if (chipset_inited) { | |
22ad57ba | 774 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
e3199b2e | 775 | goto cleanup; |
12e364b9 KC |
776 | } |
777 | chipset_inited = 1; | |
778 | POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); | |
779 | ||
780 | /* Set features to indicate we support parahotplug (if Command | |
2ee0d052 EA |
781 | * also supports it). |
782 | */ | |
12e364b9 | 783 | features = |
2ea5117b | 784 | inmsg->cmd.init_chipset. |
12e364b9 KC |
785 | features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; |
786 | ||
787 | /* Set the "reply" bit so Command knows this is a | |
2ee0d052 EA |
788 | * features-aware driver. |
789 | */ | |
12e364b9 KC |
790 | features |= ULTRA_CHIPSET_FEATURE_REPLY; |
791 | ||
e3199b2e | 792 | cleanup: |
98d7b594 | 793 | if (inmsg->hdr.flags.response_expected) |
12e364b9 KC |
794 | controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
795 | } | |
796 | ||
797 | static void | |
3ab47701 | 798 | controlvm_init_response(struct controlvm_message *msg, |
b3168c70 | 799 | struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 800 | { |
3ab47701 | 801 | memset(msg, 0, sizeof(struct controlvm_message)); |
b3168c70 | 802 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); |
98d7b594 BR |
803 | msg->hdr.payload_bytes = 0; |
804 | msg->hdr.payload_vm_offset = 0; | |
805 | msg->hdr.payload_max_bytes = 0; | |
12e364b9 | 806 | if (response < 0) { |
98d7b594 | 807 | msg->hdr.flags.failed = 1; |
0e7bf2f4 | 808 | msg->hdr.completion_status = (u32)(-response); |
12e364b9 KC |
809 | } |
810 | } | |
811 | ||
812 | static void | |
b3168c70 | 813 | controlvm_respond(struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 814 | { |
3ab47701 | 815 | struct controlvm_message outmsg; |
26eb2c0c | 816 | |
b3168c70 | 817 | controlvm_init_response(&outmsg, msg_hdr, response); |
2098dbd1 | 818 | if (outmsg.hdr.flags.test_message == 1) |
12e364b9 | 819 | return; |
2098dbd1 | 820 | |
c3d9a224 | 821 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 822 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
823 | return; |
824 | } | |
825 | } | |
826 | ||
827 | static void | |
b3168c70 | 828 | controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, |
98d7b594 | 829 | int response, |
b9b141e8 | 830 | enum ultra_chipset_feature features) |
12e364b9 | 831 | { |
3ab47701 | 832 | struct controlvm_message outmsg; |
26eb2c0c | 833 | |
b3168c70 | 834 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b | 835 | outmsg.cmd.init_chipset.features = features; |
c3d9a224 | 836 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 837 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
838 | return; |
839 | } | |
840 | } | |
841 | ||
98d7b594 | 842 | static void controlvm_respond_physdev_changestate( |
b3168c70 | 843 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 844 | struct spar_segment_state state) |
12e364b9 | 845 | { |
3ab47701 | 846 | struct controlvm_message outmsg; |
26eb2c0c | 847 | |
b3168c70 | 848 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b BR |
849 | outmsg.cmd.device_change_state.state = state; |
850 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
c3d9a224 | 851 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 852 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
853 | return; |
854 | } | |
855 | } | |
856 | ||
2ee0deec PB |
857 | enum crash_obj_type { |
858 | CRASH_DEV, | |
859 | CRASH_BUS, | |
860 | }; | |
861 | ||
12c957dc TS |
862 | static void |
863 | save_crash_message(struct controlvm_message *msg, enum crash_obj_type typ) | |
864 | { | |
865 | u32 local_crash_msg_offset; | |
866 | u16 local_crash_msg_count; | |
867 | ||
868 | if (visorchannel_read(controlvm_channel, | |
869 | offsetof(struct spar_controlvm_channel_protocol, | |
870 | saved_crash_message_count), | |
871 | &local_crash_msg_count, sizeof(u16)) < 0) { | |
872 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, | |
873 | POSTCODE_SEVERITY_ERR); | |
874 | return; | |
875 | } | |
876 | ||
877 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { | |
878 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, | |
879 | local_crash_msg_count, | |
880 | POSTCODE_SEVERITY_ERR); | |
881 | return; | |
882 | } | |
883 | ||
884 | if (visorchannel_read(controlvm_channel, | |
885 | offsetof(struct spar_controlvm_channel_protocol, | |
886 | saved_crash_message_offset), | |
887 | &local_crash_msg_offset, sizeof(u32)) < 0) { | |
888 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, | |
889 | POSTCODE_SEVERITY_ERR); | |
890 | return; | |
891 | } | |
892 | ||
893 | if (typ == CRASH_BUS) { | |
894 | if (visorchannel_write(controlvm_channel, | |
895 | local_crash_msg_offset, | |
896 | msg, | |
897 | sizeof(struct controlvm_message)) < 0) { | |
898 | POSTCODE_LINUX_2(SAVE_MSG_BUS_FAILURE_PC, | |
899 | POSTCODE_SEVERITY_ERR); | |
900 | return; | |
901 | } | |
902 | } else { | |
903 | local_crash_msg_offset += sizeof(struct controlvm_message); | |
904 | if (visorchannel_write(controlvm_channel, | |
905 | local_crash_msg_offset, | |
906 | msg, | |
907 | sizeof(struct controlvm_message)) < 0) { | |
908 | POSTCODE_LINUX_2(SAVE_MSG_DEV_FAILURE_PC, | |
909 | POSTCODE_SEVERITY_ERR); | |
910 | return; | |
911 | } | |
912 | } | |
913 | } | |
914 | ||
12e364b9 | 915 | static void |
0274b5ae DZ |
916 | bus_responder(enum controlvm_id cmd_id, |
917 | struct controlvm_message_header *pending_msg_hdr, | |
3032aedd | 918 | int response) |
12e364b9 | 919 | { |
e4a3dd33 | 920 | if (!pending_msg_hdr) |
0274b5ae | 921 | return; /* no controlvm response needed */ |
12e364b9 | 922 | |
0274b5ae | 923 | if (pending_msg_hdr->id != (u32)cmd_id) |
12e364b9 | 924 | return; |
0aca7844 | 925 | |
0274b5ae | 926 | controlvm_respond(pending_msg_hdr, response); |
12e364b9 KC |
927 | } |
928 | ||
929 | static void | |
fbb31f48 | 930 | device_changestate_responder(enum controlvm_id cmd_id, |
a298bc0b | 931 | struct visor_device *p, int response, |
fbb31f48 | 932 | struct spar_segment_state response_state) |
12e364b9 | 933 | { |
3ab47701 | 934 | struct controlvm_message outmsg; |
a298bc0b DZ |
935 | u32 bus_no = p->chipset_bus_no; |
936 | u32 dev_no = p->chipset_dev_no; | |
12e364b9 | 937 | |
e4a3dd33 | 938 | if (!p->pending_msg_hdr) |
12e364b9 | 939 | return; /* no controlvm response needed */ |
0274b5ae | 940 | if (p->pending_msg_hdr->id != cmd_id) |
12e364b9 | 941 | return; |
12e364b9 | 942 | |
0274b5ae | 943 | controlvm_init_response(&outmsg, p->pending_msg_hdr, response); |
12e364b9 | 944 | |
fbb31f48 BR |
945 | outmsg.cmd.device_change_state.bus_no = bus_no; |
946 | outmsg.cmd.device_change_state.dev_no = dev_no; | |
947 | outmsg.cmd.device_change_state.state = response_state; | |
12e364b9 | 948 | |
c3d9a224 | 949 | if (!visorchannel_signalinsert(controlvm_channel, |
0aca7844 | 950 | CONTROLVM_QUEUE_REQUEST, &outmsg)) |
12e364b9 | 951 | return; |
12e364b9 KC |
952 | } |
953 | ||
954 | static void | |
0274b5ae DZ |
955 | device_responder(enum controlvm_id cmd_id, |
956 | struct controlvm_message_header *pending_msg_hdr, | |
b4b598fd | 957 | int response) |
12e364b9 | 958 | { |
e4a3dd33 | 959 | if (!pending_msg_hdr) |
12e364b9 | 960 | return; /* no controlvm response needed */ |
0aca7844 | 961 | |
0274b5ae | 962 | if (pending_msg_hdr->id != (u32)cmd_id) |
12e364b9 | 963 | return; |
0aca7844 | 964 | |
0274b5ae | 965 | controlvm_respond(pending_msg_hdr, response); |
12e364b9 KC |
966 | } |
967 | ||
968 | static void | |
d32517e3 | 969 | bus_epilog(struct visor_device *bus_info, |
2836c6a8 | 970 | u32 cmd, struct controlvm_message_header *msg_hdr, |
f4c11551 | 971 | int response, bool need_response) |
12e364b9 | 972 | { |
f4c11551 | 973 | bool notified = false; |
0274b5ae | 974 | struct controlvm_message_header *pmsg_hdr = NULL; |
12e364b9 | 975 | |
0274b5ae DZ |
976 | if (!bus_info) { |
977 | /* relying on a valid passed in response code */ | |
978 | /* be lazy and re-use msg_hdr for this failure, is this ok?? */ | |
979 | pmsg_hdr = msg_hdr; | |
980 | goto away; | |
981 | } | |
982 | ||
983 | if (bus_info->pending_msg_hdr) { | |
984 | /* only non-NULL if dev is still waiting on a response */ | |
985 | response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; | |
986 | pmsg_hdr = bus_info->pending_msg_hdr; | |
987 | goto away; | |
988 | } | |
0aca7844 | 989 | |
2836c6a8 | 990 | if (need_response) { |
0274b5ae DZ |
991 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); |
992 | if (!pmsg_hdr) { | |
993 | response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
994 | goto away; | |
995 | } | |
996 | ||
997 | memcpy(pmsg_hdr, msg_hdr, | |
98d7b594 | 998 | sizeof(struct controlvm_message_header)); |
0274b5ae | 999 | bus_info->pending_msg_hdr = pmsg_hdr; |
75c1f8b7 | 1000 | } |
12e364b9 | 1001 | |
8f1947ac | 1002 | down(¬ifier_lock); |
12e364b9 KC |
1003 | if (response == CONTROLVM_RESP_SUCCESS) { |
1004 | switch (cmd) { | |
1005 | case CONTROLVM_BUS_CREATE: | |
4da3336c | 1006 | if (busdev_notifiers.bus_create) { |
3032aedd | 1007 | (*busdev_notifiers.bus_create) (bus_info); |
f4c11551 | 1008 | notified = true; |
12e364b9 KC |
1009 | } |
1010 | break; | |
1011 | case CONTROLVM_BUS_DESTROY: | |
4da3336c | 1012 | if (busdev_notifiers.bus_destroy) { |
3032aedd | 1013 | (*busdev_notifiers.bus_destroy) (bus_info); |
f4c11551 | 1014 | notified = true; |
12e364b9 KC |
1015 | } |
1016 | break; | |
1017 | } | |
1018 | } | |
0274b5ae | 1019 | away: |
12e364b9 KC |
1020 | if (notified) |
1021 | /* The callback function just called above is responsible | |
929aa8ae | 1022 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1023 | * function, which will call bus_responder() |
1024 | */ | |
1025 | ; | |
1026 | else | |
0274b5ae DZ |
1027 | /* |
1028 | * Do not kfree(pmsg_hdr) as this is the failure path. | |
1029 | * The success path ('notified') will call the responder | |
1030 | * directly and kfree() there. | |
1031 | */ | |
1032 | bus_responder(cmd, pmsg_hdr, response); | |
8f1947ac | 1033 | up(¬ifier_lock); |
12e364b9 KC |
1034 | } |
1035 | ||
1036 | static void | |
a298bc0b | 1037 | device_epilog(struct visor_device *dev_info, |
b4b598fd | 1038 | struct spar_segment_state state, u32 cmd, |
2836c6a8 | 1039 | struct controlvm_message_header *msg_hdr, int response, |
f4c11551 | 1040 | bool need_response, bool for_visorbus) |
12e364b9 | 1041 | { |
e82ba62e | 1042 | struct visorchipset_busdev_notifiers *notifiers; |
f4c11551 | 1043 | bool notified = false; |
0274b5ae | 1044 | struct controlvm_message_header *pmsg_hdr = NULL; |
12e364b9 | 1045 | |
4da3336c DK |
1046 | notifiers = &busdev_notifiers; |
1047 | ||
0274b5ae DZ |
1048 | if (!dev_info) { |
1049 | /* relying on a valid passed in response code */ | |
1050 | /* be lazy and re-use msg_hdr for this failure, is this ok?? */ | |
1051 | pmsg_hdr = msg_hdr; | |
1052 | goto away; | |
1053 | } | |
1054 | ||
1055 | if (dev_info->pending_msg_hdr) { | |
1056 | /* only non-NULL if dev is still waiting on a response */ | |
1057 | response = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; | |
1058 | pmsg_hdr = dev_info->pending_msg_hdr; | |
1059 | goto away; | |
1060 | } | |
1061 | ||
2836c6a8 | 1062 | if (need_response) { |
0274b5ae DZ |
1063 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); |
1064 | if (!pmsg_hdr) { | |
1065 | response = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1066 | goto away; | |
1067 | } | |
1068 | ||
1069 | memcpy(pmsg_hdr, msg_hdr, | |
98d7b594 | 1070 | sizeof(struct controlvm_message_header)); |
0274b5ae | 1071 | dev_info->pending_msg_hdr = pmsg_hdr; |
75c1f8b7 | 1072 | } |
12e364b9 | 1073 | |
8f1947ac | 1074 | down(¬ifier_lock); |
12e364b9 KC |
1075 | if (response >= 0) { |
1076 | switch (cmd) { | |
1077 | case CONTROLVM_DEVICE_CREATE: | |
1078 | if (notifiers->device_create) { | |
b4b598fd | 1079 | (*notifiers->device_create) (dev_info); |
f4c11551 | 1080 | notified = true; |
12e364b9 KC |
1081 | } |
1082 | break; | |
1083 | case CONTROLVM_DEVICE_CHANGESTATE: | |
1084 | /* ServerReady / ServerRunning / SegmentStateRunning */ | |
bd0d2dcc BR |
1085 | if (state.alive == segment_state_running.alive && |
1086 | state.operating == | |
1087 | segment_state_running.operating) { | |
12e364b9 | 1088 | if (notifiers->device_resume) { |
b4b598fd | 1089 | (*notifiers->device_resume) (dev_info); |
f4c11551 | 1090 | notified = true; |
12e364b9 KC |
1091 | } |
1092 | } | |
1093 | /* ServerNotReady / ServerLost / SegmentStateStandby */ | |
bd0d2dcc | 1094 | else if (state.alive == segment_state_standby.alive && |
3f833b54 | 1095 | state.operating == |
bd0d2dcc | 1096 | segment_state_standby.operating) { |
12e364b9 KC |
1097 | /* technically this is standby case |
1098 | * where server is lost | |
1099 | */ | |
1100 | if (notifiers->device_pause) { | |
b4b598fd | 1101 | (*notifiers->device_pause) (dev_info); |
f4c11551 | 1102 | notified = true; |
12e364b9 | 1103 | } |
12e364b9 KC |
1104 | } |
1105 | break; | |
1106 | case CONTROLVM_DEVICE_DESTROY: | |
1107 | if (notifiers->device_destroy) { | |
b4b598fd | 1108 | (*notifiers->device_destroy) (dev_info); |
f4c11551 | 1109 | notified = true; |
12e364b9 KC |
1110 | } |
1111 | break; | |
1112 | } | |
1113 | } | |
0274b5ae | 1114 | away: |
12e364b9 KC |
1115 | if (notified) |
1116 | /* The callback function just called above is responsible | |
929aa8ae | 1117 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1118 | * function, which will call device_responder() |
1119 | */ | |
1120 | ; | |
1121 | else | |
0274b5ae DZ |
1122 | /* |
1123 | * Do not kfree(pmsg_hdr) as this is the failure path. | |
1124 | * The success path ('notified') will call the responder | |
1125 | * directly and kfree() there. | |
1126 | */ | |
1127 | device_responder(cmd, pmsg_hdr, response); | |
8f1947ac | 1128 | up(¬ifier_lock); |
12e364b9 KC |
1129 | } |
1130 | ||
1131 | static void | |
3ab47701 | 1132 | bus_create(struct controlvm_message *inmsg) |
12e364b9 | 1133 | { |
2ea5117b | 1134 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1135 | u32 bus_no = cmd->create_bus.bus_no; |
12e364b9 | 1136 | int rc = CONTROLVM_RESP_SUCCESS; |
d32517e3 | 1137 | struct visor_device *bus_info; |
b32c4997 | 1138 | struct visorchannel *visorchannel; |
12e364b9 | 1139 | |
d32517e3 | 1140 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
6c5fed35 BR |
1141 | if (bus_info && (bus_info->state.created == 1)) { |
1142 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1143 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1144 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
6c5fed35 | 1145 | goto cleanup; |
12e364b9 | 1146 | } |
6c5fed35 BR |
1147 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
1148 | if (!bus_info) { | |
1149 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1150 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1151 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
6c5fed35 | 1152 | goto cleanup; |
12e364b9 KC |
1153 | } |
1154 | ||
4abce83d | 1155 | INIT_LIST_HEAD(&bus_info->list_all); |
d32517e3 DZ |
1156 | bus_info->chipset_bus_no = bus_no; |
1157 | bus_info->chipset_dev_no = BUS_ROOT_DEVICE; | |
12e364b9 | 1158 | |
6c5fed35 | 1159 | POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1160 | |
b32c4997 DZ |
1161 | visorchannel = visorchannel_create(cmd->create_bus.channel_addr, |
1162 | cmd->create_bus.channel_bytes, | |
1163 | GFP_KERNEL, | |
1164 | cmd->create_bus.bus_data_type_uuid); | |
1165 | ||
1166 | if (!visorchannel) { | |
1167 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
1168 | POSTCODE_SEVERITY_ERR); | |
1169 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1170 | kfree(bus_info); | |
1171 | bus_info = NULL; | |
1172 | goto cleanup; | |
1173 | } | |
1174 | bus_info->visorchannel = visorchannel; | |
12c957dc TS |
1175 | if (uuid_le_cmp(cmd->create_bus.bus_inst_uuid, spar_siovm_uuid) == 0) { |
1176 | dump_vhba_bus = bus_no; | |
1177 | save_crash_message(inmsg, CRASH_BUS); | |
1178 | } | |
12e364b9 | 1179 | |
6c5fed35 | 1180 | POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1181 | |
6c5fed35 | 1182 | cleanup: |
3032aedd | 1183 | bus_epilog(bus_info, CONTROLVM_BUS_CREATE, &inmsg->hdr, |
98d7b594 | 1184 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1185 | } |
1186 | ||
1187 | static void | |
3ab47701 | 1188 | bus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1189 | { |
2ea5117b | 1190 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1191 | u32 bus_no = cmd->destroy_bus.bus_no; |
d32517e3 | 1192 | struct visor_device *bus_info; |
12e364b9 KC |
1193 | int rc = CONTROLVM_RESP_SUCCESS; |
1194 | ||
d32517e3 | 1195 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
dff54cd6 | 1196 | if (!bus_info) |
22ad57ba | 1197 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
dff54cd6 | 1198 | else if (bus_info->state.created == 0) |
22ad57ba | 1199 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1200 | |
3032aedd | 1201 | bus_epilog(bus_info, CONTROLVM_BUS_DESTROY, &inmsg->hdr, |
98d7b594 | 1202 | rc, inmsg->hdr.flags.response_expected == 1); |
d32517e3 DZ |
1203 | |
1204 | /* bus_info is freed as part of the busdevice_release function */ | |
12e364b9 KC |
1205 | } |
1206 | ||
1207 | static void | |
317d9614 BR |
1208 | bus_configure(struct controlvm_message *inmsg, |
1209 | struct parser_context *parser_ctx) | |
12e364b9 | 1210 | { |
2ea5117b | 1211 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e | 1212 | u32 bus_no; |
d32517e3 | 1213 | struct visor_device *bus_info; |
12e364b9 | 1214 | int rc = CONTROLVM_RESP_SUCCESS; |
12e364b9 | 1215 | |
654bada0 BR |
1216 | bus_no = cmd->configure_bus.bus_no; |
1217 | POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no, | |
1218 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1219 | |
d32517e3 | 1220 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
654bada0 BR |
1221 | if (!bus_info) { |
1222 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1223 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1224 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1225 | } else if (bus_info->state.created == 0) { |
1226 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1227 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1228 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
e4a3dd33 | 1229 | } else if (bus_info->pending_msg_hdr) { |
654bada0 | 1230 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, |
12e364b9 | 1231 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1232 | rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; |
654bada0 | 1233 | } else { |
b32c4997 DZ |
1234 | visorchannel_set_clientpartition(bus_info->visorchannel, |
1235 | cmd->configure_bus.guest_handle); | |
654bada0 BR |
1236 | bus_info->partition_uuid = parser_id_get(parser_ctx); |
1237 | parser_param_start(parser_ctx, PARSERSTRING_NAME); | |
1238 | bus_info->name = parser_string_get(parser_ctx); | |
1239 | ||
654bada0 BR |
1240 | POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no, |
1241 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1242 | } |
3032aedd | 1243 | bus_epilog(bus_info, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, |
98d7b594 | 1244 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1245 | } |
1246 | ||
1247 | static void | |
3ab47701 | 1248 | my_device_create(struct controlvm_message *inmsg) |
12e364b9 | 1249 | { |
2ea5117b | 1250 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1251 | u32 bus_no = cmd->create_device.bus_no; |
1252 | u32 dev_no = cmd->create_device.dev_no; | |
a298bc0b | 1253 | struct visor_device *dev_info = NULL; |
d32517e3 | 1254 | struct visor_device *bus_info; |
b32c4997 | 1255 | struct visorchannel *visorchannel; |
12e364b9 KC |
1256 | int rc = CONTROLVM_RESP_SUCCESS; |
1257 | ||
a298bc0b DZ |
1258 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
1259 | if (!bus_info) { | |
c60c8e26 | 1260 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1261 | POSTCODE_SEVERITY_ERR); |
a298bc0b | 1262 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1263 | goto cleanup; |
12e364b9 | 1264 | } |
a298bc0b DZ |
1265 | |
1266 | if (bus_info->state.created == 0) { | |
c60c8e26 | 1267 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1268 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1269 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1270 | goto cleanup; |
12e364b9 | 1271 | } |
a298bc0b DZ |
1272 | |
1273 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); | |
1274 | if (dev_info && (dev_info->state.created == 1)) { | |
c60c8e26 | 1275 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, |
12e364b9 | 1276 | POSTCODE_SEVERITY_ERR); |
a298bc0b | 1277 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
c60c8e26 | 1278 | goto cleanup; |
12e364b9 | 1279 | } |
a298bc0b | 1280 | |
c60c8e26 BR |
1281 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
1282 | if (!dev_info) { | |
1283 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1284 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1285 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
c60c8e26 | 1286 | goto cleanup; |
12e364b9 | 1287 | } |
97a84f12 | 1288 | |
a298bc0b DZ |
1289 | dev_info->chipset_bus_no = bus_no; |
1290 | dev_info->chipset_dev_no = dev_no; | |
1291 | dev_info->inst = cmd->create_device.dev_inst_uuid; | |
1292 | ||
1293 | /* not sure where the best place to set the 'parent' */ | |
1294 | dev_info->device.parent = &bus_info->device; | |
1295 | ||
c60c8e26 | 1296 | POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, |
12e364b9 KC |
1297 | POSTCODE_SEVERITY_INFO); |
1298 | ||
a3ef1a8e DK |
1299 | visorchannel = |
1300 | visorchannel_create_with_lock(cmd->create_device.channel_addr, | |
1301 | cmd->create_device.channel_bytes, | |
1302 | GFP_KERNEL, | |
1303 | cmd->create_device.data_type_uuid); | |
b32c4997 DZ |
1304 | |
1305 | if (!visorchannel) { | |
1306 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
1307 | POSTCODE_SEVERITY_ERR); | |
1308 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; | |
1309 | kfree(dev_info); | |
1310 | dev_info = NULL; | |
1311 | goto cleanup; | |
1312 | } | |
1313 | dev_info->visorchannel = visorchannel; | |
1314 | dev_info->channel_type_guid = cmd->create_device.data_type_uuid; | |
12c957dc TS |
1315 | if (uuid_le_cmp(cmd->create_device.data_type_uuid, |
1316 | spar_vhba_channel_protocol_uuid) == 0) | |
1317 | save_crash_message(inmsg, CRASH_DEV); | |
1318 | ||
c60c8e26 | 1319 | POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no, |
12e364b9 | 1320 | POSTCODE_SEVERITY_INFO); |
c60c8e26 | 1321 | cleanup: |
b4b598fd | 1322 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1323 | CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, |
4da3336c | 1324 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1325 | } |
1326 | ||
1327 | static void | |
3ab47701 | 1328 | my_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 1329 | { |
2ea5117b | 1330 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1331 | u32 bus_no = cmd->device_change_state.bus_no; |
1332 | u32 dev_no = cmd->device_change_state.dev_no; | |
2ea5117b | 1333 | struct spar_segment_state state = cmd->device_change_state.state; |
a298bc0b | 1334 | struct visor_device *dev_info; |
12e364b9 KC |
1335 | int rc = CONTROLVM_RESP_SUCCESS; |
1336 | ||
a298bc0b | 1337 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
0278a905 BR |
1338 | if (!dev_info) { |
1339 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1340 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1341 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
0278a905 BR |
1342 | } else if (dev_info->state.created == 0) { |
1343 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1344 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1345 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
12e364b9 | 1346 | } |
0278a905 | 1347 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1348 | device_epilog(dev_info, state, |
0278a905 | 1349 | CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, |
4da3336c | 1350 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1351 | } |
1352 | ||
1353 | static void | |
3ab47701 | 1354 | my_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1355 | { |
2ea5117b | 1356 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1357 | u32 bus_no = cmd->destroy_device.bus_no; |
1358 | u32 dev_no = cmd->destroy_device.dev_no; | |
a298bc0b | 1359 | struct visor_device *dev_info; |
12e364b9 KC |
1360 | int rc = CONTROLVM_RESP_SUCCESS; |
1361 | ||
a298bc0b | 1362 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
61715c8b | 1363 | if (!dev_info) |
22ad57ba | 1364 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
61715c8b | 1365 | else if (dev_info->state.created == 0) |
22ad57ba | 1366 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1367 | |
61715c8b | 1368 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1369 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1370 | CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, |
4da3336c | 1371 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1372 | } |
1373 | ||
1374 | /* When provided with the physical address of the controlvm channel | |
1375 | * (phys_addr), the offset to the payload area we need to manage | |
1376 | * (offset), and the size of this payload area (bytes), fills in the | |
f4c11551 | 1377 | * controlvm_payload_info struct. Returns true for success or false |
12e364b9 KC |
1378 | * for failure. |
1379 | */ | |
1380 | static int | |
d5b3f1dc | 1381 | initialize_controlvm_payload_info(u64 phys_addr, u64 offset, u32 bytes, |
c1f834eb | 1382 | struct visor_controlvm_payload_info *info) |
12e364b9 | 1383 | { |
3103dc03 | 1384 | u8 *payload = NULL; |
12e364b9 KC |
1385 | int rc = CONTROLVM_RESP_SUCCESS; |
1386 | ||
38f736e9 | 1387 | if (!info) { |
22ad57ba | 1388 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1389 | goto cleanup; |
12e364b9 | 1390 | } |
c1f834eb | 1391 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 | 1392 | if ((offset == 0) || (bytes == 0)) { |
22ad57ba | 1393 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1394 | goto cleanup; |
12e364b9 | 1395 | } |
3103dc03 | 1396 | payload = memremap(phys_addr + offset, bytes, MEMREMAP_WB); |
38f736e9 | 1397 | if (!payload) { |
22ad57ba | 1398 | rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; |
f118a39b | 1399 | goto cleanup; |
12e364b9 KC |
1400 | } |
1401 | ||
1402 | info->offset = offset; | |
1403 | info->bytes = bytes; | |
1404 | info->ptr = payload; | |
12e364b9 | 1405 | |
f118a39b | 1406 | cleanup: |
12e364b9 | 1407 | if (rc < 0) { |
f118a39b | 1408 | if (payload) { |
3103dc03 | 1409 | memunmap(payload); |
12e364b9 KC |
1410 | payload = NULL; |
1411 | } | |
1412 | } | |
1413 | return rc; | |
1414 | } | |
1415 | ||
1416 | static void | |
c1f834eb | 1417 | destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info) |
12e364b9 | 1418 | { |
597c338f | 1419 | if (info->ptr) { |
3103dc03 | 1420 | memunmap(info->ptr); |
12e364b9 KC |
1421 | info->ptr = NULL; |
1422 | } | |
c1f834eb | 1423 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 KC |
1424 | } |
1425 | ||
1426 | static void | |
1427 | initialize_controlvm_payload(void) | |
1428 | { | |
d5b3f1dc | 1429 | u64 phys_addr = visorchannel_get_physaddr(controlvm_channel); |
cafefc0c BR |
1430 | u64 payload_offset = 0; |
1431 | u32 payload_bytes = 0; | |
26eb2c0c | 1432 | |
c3d9a224 | 1433 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1434 | offsetof(struct spar_controlvm_channel_protocol, |
1435 | request_payload_offset), | |
cafefc0c | 1436 | &payload_offset, sizeof(payload_offset)) < 0) { |
12e364b9 KC |
1437 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1438 | POSTCODE_SEVERITY_ERR); | |
1439 | return; | |
1440 | } | |
c3d9a224 | 1441 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1442 | offsetof(struct spar_controlvm_channel_protocol, |
1443 | request_payload_bytes), | |
cafefc0c | 1444 | &payload_bytes, sizeof(payload_bytes)) < 0) { |
12e364b9 KC |
1445 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1446 | POSTCODE_SEVERITY_ERR); | |
1447 | return; | |
1448 | } | |
1449 | initialize_controlvm_payload_info(phys_addr, | |
cafefc0c | 1450 | payload_offset, payload_bytes, |
84982fbf | 1451 | &controlvm_payload_info); |
12e364b9 KC |
1452 | } |
1453 | ||
1454 | /* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1455 | * Returns CONTROLVM_RESP_xxx code. | |
1456 | */ | |
d3368a58 | 1457 | static int |
12e364b9 KC |
1458 | visorchipset_chipset_ready(void) |
1459 | { | |
eb34e877 | 1460 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); |
12e364b9 KC |
1461 | return CONTROLVM_RESP_SUCCESS; |
1462 | } | |
12e364b9 | 1463 | |
d3368a58 | 1464 | static int |
12e364b9 KC |
1465 | visorchipset_chipset_selftest(void) |
1466 | { | |
1467 | char env_selftest[20]; | |
1468 | char *envp[] = { env_selftest, NULL }; | |
26eb2c0c | 1469 | |
12e364b9 | 1470 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); |
eb34e877 | 1471 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1472 | envp); |
1473 | return CONTROLVM_RESP_SUCCESS; | |
1474 | } | |
12e364b9 KC |
1475 | |
1476 | /* Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1477 | * Returns CONTROLVM_RESP_xxx code. | |
1478 | */ | |
d3368a58 | 1479 | static int |
12e364b9 KC |
1480 | visorchipset_chipset_notready(void) |
1481 | { | |
eb34e877 | 1482 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); |
12e364b9 KC |
1483 | return CONTROLVM_RESP_SUCCESS; |
1484 | } | |
12e364b9 KC |
1485 | |
1486 | static void | |
77a0449d | 1487 | chipset_ready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1488 | { |
1489 | int rc = visorchipset_chipset_ready(); | |
26eb2c0c | 1490 | |
12e364b9 KC |
1491 | if (rc != CONTROLVM_RESP_SUCCESS) |
1492 | rc = -rc; | |
77a0449d BR |
1493 | if (msg_hdr->flags.response_expected && !visorchipset_holdchipsetready) |
1494 | controlvm_respond(msg_hdr, rc); | |
1495 | if (msg_hdr->flags.response_expected && visorchipset_holdchipsetready) { | |
12e364b9 KC |
1496 | /* Send CHIPSET_READY response when all modules have been loaded |
1497 | * and disks mounted for the partition | |
1498 | */ | |
77a0449d | 1499 | g_chipset_msg_hdr = *msg_hdr; |
12e364b9 KC |
1500 | } |
1501 | } | |
1502 | ||
1503 | static void | |
77a0449d | 1504 | chipset_selftest(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1505 | { |
1506 | int rc = visorchipset_chipset_selftest(); | |
26eb2c0c | 1507 | |
12e364b9 KC |
1508 | if (rc != CONTROLVM_RESP_SUCCESS) |
1509 | rc = -rc; | |
77a0449d BR |
1510 | if (msg_hdr->flags.response_expected) |
1511 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1512 | } |
1513 | ||
1514 | static void | |
77a0449d | 1515 | chipset_notready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1516 | { |
1517 | int rc = visorchipset_chipset_notready(); | |
26eb2c0c | 1518 | |
12e364b9 KC |
1519 | if (rc != CONTROLVM_RESP_SUCCESS) |
1520 | rc = -rc; | |
77a0449d BR |
1521 | if (msg_hdr->flags.response_expected) |
1522 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1523 | } |
1524 | ||
1525 | /* This is your "one-stop" shop for grabbing the next message from the | |
1526 | * CONTROLVM_QUEUE_EVENT queue in the controlvm channel. | |
1527 | */ | |
f4c11551 | 1528 | static bool |
3ab47701 | 1529 | read_controlvm_event(struct controlvm_message *msg) |
12e364b9 | 1530 | { |
c3d9a224 | 1531 | if (visorchannel_signalremove(controlvm_channel, |
12e364b9 KC |
1532 | CONTROLVM_QUEUE_EVENT, msg)) { |
1533 | /* got a message */ | |
0aca7844 | 1534 | if (msg->hdr.flags.test_message == 1) |
f4c11551 JS |
1535 | return false; |
1536 | return true; | |
12e364b9 | 1537 | } |
f4c11551 | 1538 | return false; |
12e364b9 KC |
1539 | } |
1540 | ||
1541 | /* | |
1542 | * The general parahotplug flow works as follows. The visorchipset | |
1543 | * driver receives a DEVICE_CHANGESTATE message from Command | |
1544 | * specifying a physical device to enable or disable. The CONTROLVM | |
1545 | * message handler calls parahotplug_process_message, which then adds | |
1546 | * the message to a global list and kicks off a udev event which | |
1547 | * causes a user level script to enable or disable the specified | |
1548 | * device. The udev script then writes to | |
1549 | * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write | |
1550 | * to get called, at which point the appropriate CONTROLVM message is | |
1551 | * retrieved from the list and responded to. | |
1552 | */ | |
1553 | ||
1554 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
1555 | ||
1556 | /* | |
1557 | * Generate unique int to match an outstanding CONTROLVM message with a | |
1558 | * udev script /proc response | |
1559 | */ | |
1560 | static int | |
1561 | parahotplug_next_id(void) | |
1562 | { | |
1563 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 1564 | |
12e364b9 KC |
1565 | return atomic_inc_return(&id); |
1566 | } | |
1567 | ||
1568 | /* | |
1569 | * Returns the time (in jiffies) when a CONTROLVM message on the list | |
1570 | * should expire -- PARAHOTPLUG_TIMEOUT_MS in the future | |
1571 | */ | |
1572 | static unsigned long | |
1573 | parahotplug_next_expiration(void) | |
1574 | { | |
2cc1a1b3 | 1575 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
1576 | } |
1577 | ||
1578 | /* | |
1579 | * Create a parahotplug_request, which is basically a wrapper for a | |
1580 | * CONTROLVM_MESSAGE that we can stick on a list | |
1581 | */ | |
1582 | static struct parahotplug_request * | |
3ab47701 | 1583 | parahotplug_request_create(struct controlvm_message *msg) |
12e364b9 | 1584 | { |
ea0dcfcf QL |
1585 | struct parahotplug_request *req; |
1586 | ||
6a55e3c3 | 1587 | req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY); |
38f736e9 | 1588 | if (!req) |
12e364b9 KC |
1589 | return NULL; |
1590 | ||
1591 | req->id = parahotplug_next_id(); | |
1592 | req->expiration = parahotplug_next_expiration(); | |
1593 | req->msg = *msg; | |
1594 | ||
1595 | return req; | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * Free a parahotplug_request. | |
1600 | */ | |
1601 | static void | |
1602 | parahotplug_request_destroy(struct parahotplug_request *req) | |
1603 | { | |
1604 | kfree(req); | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * Cause uevent to run the user level script to do the disable/enable | |
1609 | * specified in (the CONTROLVM message in) the specified | |
1610 | * parahotplug_request | |
1611 | */ | |
1612 | static void | |
1613 | parahotplug_request_kickoff(struct parahotplug_request *req) | |
1614 | { | |
2ea5117b | 1615 | struct controlvm_message_packet *cmd = &req->msg.cmd; |
12e364b9 KC |
1616 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], |
1617 | env_func[40]; | |
1618 | char *envp[] = { | |
1619 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1620 | }; | |
1621 | ||
1622 | sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); | |
1623 | sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); | |
1624 | sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", | |
2ea5117b | 1625 | cmd->device_change_state.state.active); |
12e364b9 | 1626 | sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", |
2ea5117b | 1627 | cmd->device_change_state.bus_no); |
12e364b9 | 1628 | sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", |
2ea5117b | 1629 | cmd->device_change_state.dev_no >> 3); |
12e364b9 | 1630 | sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", |
2ea5117b | 1631 | cmd->device_change_state.dev_no & 0x7); |
12e364b9 | 1632 | |
eb34e877 | 1633 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1634 | envp); |
1635 | } | |
1636 | ||
1637 | /* | |
1638 | * Remove any request from the list that's been on there too long and | |
1639 | * respond with an error. | |
1640 | */ | |
1641 | static void | |
1642 | parahotplug_process_list(void) | |
1643 | { | |
e82ba62e JS |
1644 | struct list_head *pos; |
1645 | struct list_head *tmp; | |
12e364b9 | 1646 | |
ddf5de53 | 1647 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 | 1648 | |
ddf5de53 | 1649 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1650 | struct parahotplug_request *req = |
1651 | list_entry(pos, struct parahotplug_request, list); | |
55b33413 BR |
1652 | |
1653 | if (!time_after_eq(jiffies, req->expiration)) | |
1654 | continue; | |
1655 | ||
1656 | list_del(pos); | |
1657 | if (req->msg.hdr.flags.response_expected) | |
1658 | controlvm_respond_physdev_changestate( | |
1659 | &req->msg.hdr, | |
1660 | CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, | |
1661 | req->msg.cmd.device_change_state.state); | |
1662 | parahotplug_request_destroy(req); | |
12e364b9 KC |
1663 | } |
1664 | ||
ddf5de53 | 1665 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1666 | } |
1667 | ||
1668 | /* | |
1669 | * Called from the /proc handler, which means the user script has | |
1670 | * finished the enable/disable. Find the matching identifier, and | |
1671 | * respond to the CONTROLVM message with success. | |
1672 | */ | |
1673 | static int | |
b06bdf7d | 1674 | parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1675 | { |
e82ba62e JS |
1676 | struct list_head *pos; |
1677 | struct list_head *tmp; | |
12e364b9 | 1678 | |
ddf5de53 | 1679 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1680 | |
1681 | /* Look for a request matching "id". */ | |
ddf5de53 | 1682 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1683 | struct parahotplug_request *req = |
1684 | list_entry(pos, struct parahotplug_request, list); | |
1685 | if (req->id == id) { | |
1686 | /* Found a match. Remove it from the list and | |
1687 | * respond. | |
1688 | */ | |
1689 | list_del(pos); | |
ddf5de53 | 1690 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1691 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1692 | if (req->msg.hdr.flags.response_expected) |
12e364b9 KC |
1693 | controlvm_respond_physdev_changestate( |
1694 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
2ea5117b | 1695 | req->msg.cmd.device_change_state.state); |
12e364b9 KC |
1696 | parahotplug_request_destroy(req); |
1697 | return 0; | |
1698 | } | |
1699 | } | |
1700 | ||
ddf5de53 | 1701 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1702 | return -1; |
1703 | } | |
1704 | ||
1705 | /* | |
1706 | * Enables or disables a PCI device by kicking off a udev script | |
1707 | */ | |
bd5b9b32 | 1708 | static void |
3ab47701 | 1709 | parahotplug_process_message(struct controlvm_message *inmsg) |
12e364b9 KC |
1710 | { |
1711 | struct parahotplug_request *req; | |
1712 | ||
1713 | req = parahotplug_request_create(inmsg); | |
1714 | ||
38f736e9 | 1715 | if (!req) |
12e364b9 | 1716 | return; |
12e364b9 | 1717 | |
2ea5117b | 1718 | if (inmsg->cmd.device_change_state.state.active) { |
12e364b9 KC |
1719 | /* For enable messages, just respond with success |
1720 | * right away. This is a bit of a hack, but there are | |
1721 | * issues with the early enable messages we get (with | |
1722 | * either the udev script not detecting that the device | |
1723 | * is up, or not getting called at all). Fortunately | |
1724 | * the messages that get lost don't matter anyway, as | |
1725 | * devices are automatically enabled at | |
1726 | * initialization. | |
1727 | */ | |
1728 | parahotplug_request_kickoff(req); | |
1729 | controlvm_respond_physdev_changestate(&inmsg->hdr, | |
8e76e695 BR |
1730 | CONTROLVM_RESP_SUCCESS, |
1731 | inmsg->cmd.device_change_state.state); | |
12e364b9 KC |
1732 | parahotplug_request_destroy(req); |
1733 | } else { | |
1734 | /* For disable messages, add the request to the | |
1735 | * request list before kicking off the udev script. It | |
1736 | * won't get responded to until the script has | |
1737 | * indicated it's done. | |
1738 | */ | |
ddf5de53 BR |
1739 | spin_lock(¶hotplug_request_list_lock); |
1740 | list_add_tail(&req->list, ¶hotplug_request_list); | |
1741 | spin_unlock(¶hotplug_request_list_lock); | |
12e364b9 KC |
1742 | |
1743 | parahotplug_request_kickoff(req); | |
1744 | } | |
1745 | } | |
1746 | ||
12e364b9 KC |
1747 | /* Process a controlvm message. |
1748 | * Return result: | |
779d0752 | 1749 | * false - this function will return false only in the case where the |
12e364b9 KC |
1750 | * controlvm message was NOT processed, but processing must be |
1751 | * retried before reading the next controlvm message; a | |
1752 | * scenario where this can occur is when we need to throttle | |
1753 | * the allocation of memory in which to copy out controlvm | |
1754 | * payload data | |
f4c11551 | 1755 | * true - processing of the controlvm message completed, |
12e364b9 KC |
1756 | * either successfully or with an error. |
1757 | */ | |
f4c11551 | 1758 | static bool |
d5b3f1dc | 1759 | handle_command(struct controlvm_message inmsg, u64 channel_addr) |
12e364b9 | 1760 | { |
2ea5117b | 1761 | struct controlvm_message_packet *cmd = &inmsg.cmd; |
e82ba62e JS |
1762 | u64 parm_addr; |
1763 | u32 parm_bytes; | |
317d9614 | 1764 | struct parser_context *parser_ctx = NULL; |
e82ba62e | 1765 | bool local_addr; |
3ab47701 | 1766 | struct controlvm_message ackmsg; |
12e364b9 KC |
1767 | |
1768 | /* create parsing context if necessary */ | |
818352a8 | 1769 | local_addr = (inmsg.hdr.flags.test_message == 1); |
0aca7844 | 1770 | if (channel_addr == 0) |
f4c11551 | 1771 | return true; |
818352a8 BR |
1772 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; |
1773 | parm_bytes = inmsg.hdr.payload_bytes; | |
12e364b9 KC |
1774 | |
1775 | /* Parameter and channel addresses within test messages actually lie | |
1776 | * within our OS-controlled memory. We need to know that, because it | |
1777 | * makes a difference in how we compute the virtual address. | |
1778 | */ | |
ebec8967 | 1779 | if (parm_addr && parm_bytes) { |
f4c11551 | 1780 | bool retry = false; |
26eb2c0c | 1781 | |
12e364b9 | 1782 | parser_ctx = |
818352a8 BR |
1783 | parser_init_byte_stream(parm_addr, parm_bytes, |
1784 | local_addr, &retry); | |
1b08872e | 1785 | if (!parser_ctx && retry) |
f4c11551 | 1786 | return false; |
12e364b9 KC |
1787 | } |
1788 | ||
818352a8 | 1789 | if (!local_addr) { |
12e364b9 KC |
1790 | controlvm_init_response(&ackmsg, &inmsg.hdr, |
1791 | CONTROLVM_RESP_SUCCESS); | |
c3d9a224 BR |
1792 | if (controlvm_channel) |
1793 | visorchannel_signalinsert(controlvm_channel, | |
1b08872e BR |
1794 | CONTROLVM_QUEUE_ACK, |
1795 | &ackmsg); | |
12e364b9 | 1796 | } |
98d7b594 | 1797 | switch (inmsg.hdr.id) { |
12e364b9 | 1798 | case CONTROLVM_CHIPSET_INIT: |
12e364b9 KC |
1799 | chipset_init(&inmsg); |
1800 | break; | |
1801 | case CONTROLVM_BUS_CREATE: | |
12e364b9 KC |
1802 | bus_create(&inmsg); |
1803 | break; | |
1804 | case CONTROLVM_BUS_DESTROY: | |
12e364b9 KC |
1805 | bus_destroy(&inmsg); |
1806 | break; | |
1807 | case CONTROLVM_BUS_CONFIGURE: | |
12e364b9 KC |
1808 | bus_configure(&inmsg, parser_ctx); |
1809 | break; | |
1810 | case CONTROLVM_DEVICE_CREATE: | |
12e364b9 KC |
1811 | my_device_create(&inmsg); |
1812 | break; | |
1813 | case CONTROLVM_DEVICE_CHANGESTATE: | |
2ea5117b | 1814 | if (cmd->device_change_state.flags.phys_device) { |
12e364b9 KC |
1815 | parahotplug_process_message(&inmsg); |
1816 | } else { | |
12e364b9 KC |
1817 | /* save the hdr and cmd structures for later use */ |
1818 | /* when sending back the response to Command */ | |
1819 | my_device_changestate(&inmsg); | |
4f44b72d | 1820 | g_devicechangestate_packet = inmsg.cmd; |
12e364b9 KC |
1821 | break; |
1822 | } | |
1823 | break; | |
1824 | case CONTROLVM_DEVICE_DESTROY: | |
12e364b9 KC |
1825 | my_device_destroy(&inmsg); |
1826 | break; | |
1827 | case CONTROLVM_DEVICE_CONFIGURE: | |
12e364b9 | 1828 | /* no op for now, just send a respond that we passed */ |
98d7b594 | 1829 | if (inmsg.hdr.flags.response_expected) |
12e364b9 KC |
1830 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); |
1831 | break; | |
1832 | case CONTROLVM_CHIPSET_READY: | |
12e364b9 KC |
1833 | chipset_ready(&inmsg.hdr); |
1834 | break; | |
1835 | case CONTROLVM_CHIPSET_SELFTEST: | |
12e364b9 KC |
1836 | chipset_selftest(&inmsg.hdr); |
1837 | break; | |
1838 | case CONTROLVM_CHIPSET_STOP: | |
12e364b9 KC |
1839 | chipset_notready(&inmsg.hdr); |
1840 | break; | |
1841 | default: | |
98d7b594 | 1842 | if (inmsg.hdr.flags.response_expected) |
12e364b9 | 1843 | controlvm_respond(&inmsg.hdr, |
818352a8 | 1844 | -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); |
12e364b9 KC |
1845 | break; |
1846 | } | |
1847 | ||
38f736e9 | 1848 | if (parser_ctx) { |
12e364b9 KC |
1849 | parser_done(parser_ctx); |
1850 | parser_ctx = NULL; | |
1851 | } | |
f4c11551 | 1852 | return true; |
12e364b9 KC |
1853 | } |
1854 | ||
5f3a7e36 DK |
1855 | static inline unsigned int |
1856 | issue_vmcall_io_controlvm_addr(u64 *control_addr, u32 *control_bytes) | |
1857 | { | |
1858 | struct vmcall_io_controlvm_addr_params params; | |
1859 | int result = VMCALL_SUCCESS; | |
1860 | u64 physaddr; | |
1861 | ||
1862 | physaddr = virt_to_phys(¶ms); | |
1863 | ISSUE_IO_VMCALL(VMCALL_IO_CONTROLVM_ADDR, physaddr, result); | |
1864 | if (VMCALL_SUCCESSFUL(result)) { | |
1865 | *control_addr = params.address; | |
1866 | *control_bytes = params.channel_bytes; | |
1867 | } | |
1868 | return result; | |
1869 | } | |
1870 | ||
d5b3f1dc | 1871 | static u64 controlvm_get_channel_address(void) |
524b0b63 | 1872 | { |
5fc0229a | 1873 | u64 addr = 0; |
b3c55b13 | 1874 | u32 size = 0; |
524b0b63 | 1875 | |
0aca7844 | 1876 | if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) |
524b0b63 | 1877 | return 0; |
0aca7844 | 1878 | |
524b0b63 BR |
1879 | return addr; |
1880 | } | |
1881 | ||
12e364b9 KC |
1882 | static void |
1883 | controlvm_periodic_work(struct work_struct *work) | |
1884 | { | |
3ab47701 | 1885 | struct controlvm_message inmsg; |
f4c11551 JS |
1886 | bool got_command = false; |
1887 | bool handle_command_failed = false; | |
1c1ed292 | 1888 | static u64 poll_count; |
12e364b9 KC |
1889 | |
1890 | /* make sure visorbus server is registered for controlvm callbacks */ | |
4da3336c | 1891 | if (visorchipset_visorbusregwait && !visorbusregistered) |
1c1ed292 | 1892 | goto cleanup; |
12e364b9 | 1893 | |
1c1ed292 BR |
1894 | poll_count++; |
1895 | if (poll_count >= 250) | |
12e364b9 KC |
1896 | ; /* keep going */ |
1897 | else | |
1c1ed292 | 1898 | goto cleanup; |
12e364b9 KC |
1899 | |
1900 | /* Check events to determine if response to CHIPSET_READY | |
1901 | * should be sent | |
1902 | */ | |
0639ba67 BR |
1903 | if (visorchipset_holdchipsetready && |
1904 | (g_chipset_msg_hdr.id != CONTROLVM_INVALID)) { | |
12e364b9 | 1905 | if (check_chipset_events() == 1) { |
da021f02 | 1906 | controlvm_respond(&g_chipset_msg_hdr, 0); |
12e364b9 | 1907 | clear_chipset_events(); |
da021f02 | 1908 | memset(&g_chipset_msg_hdr, 0, |
98d7b594 | 1909 | sizeof(struct controlvm_message_header)); |
12e364b9 KC |
1910 | } |
1911 | } | |
1912 | ||
c3d9a224 | 1913 | while (visorchannel_signalremove(controlvm_channel, |
8a1182eb | 1914 | CONTROLVM_QUEUE_RESPONSE, |
c3d9a224 BR |
1915 | &inmsg)) |
1916 | ; | |
1c1ed292 | 1917 | if (!got_command) { |
7166ed19 | 1918 | if (controlvm_pending_msg_valid) { |
8a1182eb BR |
1919 | /* we throttled processing of a prior |
1920 | * msg, so try to process it again | |
1921 | * rather than reading a new one | |
1922 | */ | |
7166ed19 | 1923 | inmsg = controlvm_pending_msg; |
f4c11551 | 1924 | controlvm_pending_msg_valid = false; |
1c1ed292 | 1925 | got_command = true; |
75c1f8b7 | 1926 | } else { |
1c1ed292 | 1927 | got_command = read_controlvm_event(&inmsg); |
75c1f8b7 | 1928 | } |
8a1182eb | 1929 | } |
12e364b9 | 1930 | |
f4c11551 | 1931 | handle_command_failed = false; |
1c1ed292 | 1932 | while (got_command && (!handle_command_failed)) { |
b53e0e93 | 1933 | most_recent_message_jiffies = jiffies; |
8a1182eb BR |
1934 | if (handle_command(inmsg, |
1935 | visorchannel_get_physaddr | |
c3d9a224 | 1936 | (controlvm_channel))) |
1c1ed292 | 1937 | got_command = read_controlvm_event(&inmsg); |
8a1182eb BR |
1938 | else { |
1939 | /* this is a scenario where throttling | |
1940 | * is required, but probably NOT an | |
1941 | * error...; we stash the current | |
1942 | * controlvm msg so we will attempt to | |
1943 | * reprocess it on our next loop | |
1944 | */ | |
f4c11551 | 1945 | handle_command_failed = true; |
7166ed19 | 1946 | controlvm_pending_msg = inmsg; |
f4c11551 | 1947 | controlvm_pending_msg_valid = true; |
12e364b9 KC |
1948 | } |
1949 | } | |
1950 | ||
1951 | /* parahotplug_worker */ | |
1952 | parahotplug_process_list(); | |
1953 | ||
1c1ed292 | 1954 | cleanup: |
12e364b9 KC |
1955 | |
1956 | if (time_after(jiffies, | |
b53e0e93 | 1957 | most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { |
12e364b9 KC |
1958 | /* it's been longer than MIN_IDLE_SECONDS since we |
1959 | * processed our last controlvm message; slow down the | |
1960 | * polling | |
1961 | */ | |
911e213e BR |
1962 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) |
1963 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
12e364b9 | 1964 | } else { |
911e213e BR |
1965 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) |
1966 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
12e364b9 KC |
1967 | } |
1968 | ||
0bde2979 | 1969 | schedule_delayed_work(&periodic_controlvm_work, poll_jiffies); |
12e364b9 KC |
1970 | } |
1971 | ||
1972 | static void | |
1973 | setup_crash_devices_work_queue(struct work_struct *work) | |
1974 | { | |
e6bdb904 BR |
1975 | struct controlvm_message local_crash_bus_msg; |
1976 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 1977 | struct controlvm_message msg; |
e6bdb904 BR |
1978 | u32 local_crash_msg_offset; |
1979 | u16 local_crash_msg_count; | |
12e364b9 | 1980 | |
4da3336c DK |
1981 | /* make sure visorbus is registered for controlvm callbacks */ |
1982 | if (visorchipset_visorbusregwait && !visorbusregistered) | |
e6bdb904 | 1983 | goto cleanup; |
12e364b9 KC |
1984 | |
1985 | POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
1986 | ||
1987 | /* send init chipset msg */ | |
98d7b594 | 1988 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
1989 | msg.cmd.init_chipset.bus_count = 23; |
1990 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
1991 | |
1992 | chipset_init(&msg); | |
1993 | ||
12e364b9 | 1994 | /* get saved message count */ |
c3d9a224 | 1995 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1996 | offsetof(struct spar_controlvm_channel_protocol, |
1997 | saved_crash_message_count), | |
e6bdb904 | 1998 | &local_crash_msg_count, sizeof(u16)) < 0) { |
12e364b9 KC |
1999 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
2000 | POSTCODE_SEVERITY_ERR); | |
2001 | return; | |
2002 | } | |
2003 | ||
e6bdb904 | 2004 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
12e364b9 | 2005 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
e6bdb904 | 2006 | local_crash_msg_count, |
12e364b9 KC |
2007 | POSTCODE_SEVERITY_ERR); |
2008 | return; | |
2009 | } | |
2010 | ||
2011 | /* get saved crash message offset */ | |
c3d9a224 | 2012 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
2013 | offsetof(struct spar_controlvm_channel_protocol, |
2014 | saved_crash_message_offset), | |
e6bdb904 | 2015 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
12e364b9 KC |
2016 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
2017 | POSTCODE_SEVERITY_ERR); | |
2018 | return; | |
2019 | } | |
2020 | ||
2021 | /* read create device message for storage bus offset */ | |
c3d9a224 | 2022 | if (visorchannel_read(controlvm_channel, |
e6bdb904 BR |
2023 | local_crash_msg_offset, |
2024 | &local_crash_bus_msg, | |
3ab47701 | 2025 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
2026 | POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, |
2027 | POSTCODE_SEVERITY_ERR); | |
2028 | return; | |
2029 | } | |
2030 | ||
2031 | /* read create device message for storage device */ | |
c3d9a224 | 2032 | if (visorchannel_read(controlvm_channel, |
e6bdb904 | 2033 | local_crash_msg_offset + |
3ab47701 | 2034 | sizeof(struct controlvm_message), |
e6bdb904 | 2035 | &local_crash_dev_msg, |
3ab47701 | 2036 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
2037 | POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, |
2038 | POSTCODE_SEVERITY_ERR); | |
2039 | return; | |
2040 | } | |
2041 | ||
2042 | /* reuse IOVM create bus message */ | |
ebec8967 | 2043 | if (local_crash_bus_msg.cmd.create_bus.channel_addr) { |
e6bdb904 | 2044 | bus_create(&local_crash_bus_msg); |
75c1f8b7 | 2045 | } else { |
12e364b9 KC |
2046 | POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, |
2047 | POSTCODE_SEVERITY_ERR); | |
2048 | return; | |
2049 | } | |
2050 | ||
2051 | /* reuse create device message for storage device */ | |
ebec8967 | 2052 | if (local_crash_dev_msg.cmd.create_device.channel_addr) { |
e6bdb904 | 2053 | my_device_create(&local_crash_dev_msg); |
75c1f8b7 | 2054 | } else { |
12e364b9 KC |
2055 | POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, |
2056 | POSTCODE_SEVERITY_ERR); | |
2057 | return; | |
2058 | } | |
12e364b9 KC |
2059 | POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2060 | return; | |
2061 | ||
e6bdb904 | 2062 | cleanup: |
12e364b9 | 2063 | |
911e213e | 2064 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; |
12e364b9 | 2065 | |
0bde2979 | 2066 | schedule_delayed_work(&periodic_controlvm_work, poll_jiffies); |
12e364b9 KC |
2067 | } |
2068 | ||
2069 | static void | |
d32517e3 | 2070 | bus_create_response(struct visor_device *bus_info, int response) |
12e364b9 | 2071 | { |
4b4fd43a | 2072 | if (response >= 0) |
0274b5ae | 2073 | bus_info->state.created = 1; |
0274b5ae DZ |
2074 | |
2075 | bus_responder(CONTROLVM_BUS_CREATE, bus_info->pending_msg_hdr, | |
2076 | response); | |
2077 | ||
2078 | kfree(bus_info->pending_msg_hdr); | |
2079 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
2080 | } |
2081 | ||
2082 | static void | |
d32517e3 | 2083 | bus_destroy_response(struct visor_device *bus_info, int response) |
12e364b9 | 2084 | { |
0274b5ae DZ |
2085 | bus_responder(CONTROLVM_BUS_DESTROY, bus_info->pending_msg_hdr, |
2086 | response); | |
2087 | ||
2088 | kfree(bus_info->pending_msg_hdr); | |
2089 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
2090 | } |
2091 | ||
2092 | static void | |
a298bc0b | 2093 | device_create_response(struct visor_device *dev_info, int response) |
12e364b9 | 2094 | { |
0274b5ae DZ |
2095 | if (response >= 0) |
2096 | dev_info->state.created = 1; | |
2097 | ||
2098 | device_responder(CONTROLVM_DEVICE_CREATE, dev_info->pending_msg_hdr, | |
2099 | response); | |
2100 | ||
2101 | kfree(dev_info->pending_msg_hdr); | |
addce19f | 2102 | dev_info->pending_msg_hdr = NULL; |
12e364b9 KC |
2103 | } |
2104 | ||
2105 | static void | |
a298bc0b | 2106 | device_destroy_response(struct visor_device *dev_info, int response) |
12e364b9 | 2107 | { |
0274b5ae DZ |
2108 | device_responder(CONTROLVM_DEVICE_DESTROY, dev_info->pending_msg_hdr, |
2109 | response); | |
2110 | ||
2111 | kfree(dev_info->pending_msg_hdr); | |
2112 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
2113 | } |
2114 | ||
d3368a58 | 2115 | static void |
a298bc0b | 2116 | visorchipset_device_pause_response(struct visor_device *dev_info, |
b4b598fd | 2117 | int response) |
12e364b9 | 2118 | { |
12e364b9 | 2119 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
b4b598fd | 2120 | dev_info, response, |
bd0d2dcc | 2121 | segment_state_standby); |
0274b5ae DZ |
2122 | |
2123 | kfree(dev_info->pending_msg_hdr); | |
2124 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 | 2125 | } |
12e364b9 KC |
2126 | |
2127 | static void | |
a298bc0b | 2128 | device_resume_response(struct visor_device *dev_info, int response) |
12e364b9 KC |
2129 | { |
2130 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
b4b598fd | 2131 | dev_info, response, |
bd0d2dcc | 2132 | segment_state_running); |
0274b5ae DZ |
2133 | |
2134 | kfree(dev_info->pending_msg_hdr); | |
2135 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
2136 | } |
2137 | ||
18b87ed1 | 2138 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
2139 | struct device_attribute *attr, |
2140 | const char *buf, size_t count) | |
12e364b9 | 2141 | { |
18b87ed1 | 2142 | char msgtype[64]; |
12e364b9 | 2143 | |
66e24b76 BR |
2144 | if (sscanf(buf, "%63s", msgtype) != 1) |
2145 | return -EINVAL; | |
2146 | ||
ebec8967 | 2147 | if (!strcmp(msgtype, "CALLHOMEDISK_MOUNTED")) { |
66e24b76 BR |
2148 | chipset_events[0] = 1; |
2149 | return count; | |
ebec8967 | 2150 | } else if (!strcmp(msgtype, "MODULES_LOADED")) { |
66e24b76 BR |
2151 | chipset_events[1] = 1; |
2152 | return count; | |
e22a4a0f BR |
2153 | } |
2154 | return -EINVAL; | |
12e364b9 KC |
2155 | } |
2156 | ||
e56fa7cd BR |
2157 | /* The parahotplug/devicedisabled interface gets called by our support script |
2158 | * when an SR-IOV device has been shut down. The ID is passed to the script | |
2159 | * and then passed back when the device has been removed. | |
2160 | */ | |
2161 | static ssize_t devicedisabled_store(struct device *dev, | |
8e76e695 BR |
2162 | struct device_attribute *attr, |
2163 | const char *buf, size_t count) | |
e56fa7cd | 2164 | { |
94217363 | 2165 | unsigned int id; |
e56fa7cd | 2166 | |
ebec8967 | 2167 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2168 | return -EINVAL; |
2169 | ||
2170 | parahotplug_request_complete(id, 0); | |
2171 | return count; | |
2172 | } | |
2173 | ||
2174 | /* The parahotplug/deviceenabled interface gets called by our support script | |
2175 | * when an SR-IOV device has been recovered. The ID is passed to the script | |
2176 | * and then passed back when the device has been brought back up. | |
2177 | */ | |
2178 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
2179 | struct device_attribute *attr, |
2180 | const char *buf, size_t count) | |
e56fa7cd | 2181 | { |
94217363 | 2182 | unsigned int id; |
e56fa7cd | 2183 | |
ebec8967 | 2184 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2185 | return -EINVAL; |
2186 | ||
2187 | parahotplug_request_complete(id, 1); | |
2188 | return count; | |
2189 | } | |
2190 | ||
e3420ed6 EA |
2191 | static int |
2192 | visorchipset_mmap(struct file *file, struct vm_area_struct *vma) | |
2193 | { | |
2194 | unsigned long physaddr = 0; | |
2195 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
780fcad3 | 2196 | u64 addr = 0; |
e3420ed6 EA |
2197 | |
2198 | /* sv_enable_dfp(); */ | |
2199 | if (offset & (PAGE_SIZE - 1)) | |
2200 | return -ENXIO; /* need aligned offsets */ | |
2201 | ||
2202 | switch (offset) { | |
2203 | case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: | |
2204 | vma->vm_flags |= VM_IO; | |
2205 | if (!*file_controlvm_channel) | |
2206 | return -ENXIO; | |
2207 | ||
2208 | visorchannel_read(*file_controlvm_channel, | |
2209 | offsetof(struct spar_controlvm_channel_protocol, | |
2210 | gp_control_channel), | |
2211 | &addr, sizeof(addr)); | |
2212 | if (!addr) | |
2213 | return -ENXIO; | |
2214 | ||
2215 | physaddr = (unsigned long)addr; | |
2216 | if (remap_pfn_range(vma, vma->vm_start, | |
2217 | physaddr >> PAGE_SHIFT, | |
2218 | vma->vm_end - vma->vm_start, | |
2219 | /*pgprot_noncached */ | |
2220 | (vma->vm_page_prot))) { | |
2221 | return -EAGAIN; | |
2222 | } | |
2223 | break; | |
2224 | default: | |
2225 | return -ENXIO; | |
2226 | } | |
2227 | return 0; | |
2228 | } | |
2229 | ||
5f3a7e36 DK |
2230 | static inline s64 issue_vmcall_query_guest_virtual_time_offset(void) |
2231 | { | |
2232 | u64 result = VMCALL_SUCCESS; | |
2233 | u64 physaddr = 0; | |
2234 | ||
2235 | ISSUE_IO_VMCALL(VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET, physaddr, | |
2236 | result); | |
2237 | return result; | |
2238 | } | |
2239 | ||
2240 | static inline int issue_vmcall_update_physical_time(u64 adjustment) | |
2241 | { | |
2242 | int result = VMCALL_SUCCESS; | |
2243 | ||
2244 | ISSUE_IO_VMCALL(VMCALL_UPDATE_PHYSICAL_TIME, adjustment, result); | |
2245 | return result; | |
2246 | } | |
2247 | ||
e3420ed6 EA |
2248 | static long visorchipset_ioctl(struct file *file, unsigned int cmd, |
2249 | unsigned long arg) | |
2250 | { | |
2500276e | 2251 | u64 adjustment; |
e3420ed6 EA |
2252 | s64 vrtc_offset; |
2253 | ||
2254 | switch (cmd) { | |
2255 | case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: | |
2256 | /* get the physical rtc offset */ | |
2257 | vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); | |
2258 | if (copy_to_user((void __user *)arg, &vrtc_offset, | |
2259 | sizeof(vrtc_offset))) { | |
2260 | return -EFAULT; | |
2261 | } | |
d5b3f1dc | 2262 | return 0; |
e3420ed6 EA |
2263 | case VMCALL_UPDATE_PHYSICAL_TIME: |
2264 | if (copy_from_user(&adjustment, (void __user *)arg, | |
2265 | sizeof(adjustment))) { | |
2266 | return -EFAULT; | |
2267 | } | |
2268 | return issue_vmcall_update_physical_time(adjustment); | |
2269 | default: | |
2270 | return -EFAULT; | |
2271 | } | |
2272 | } | |
2273 | ||
2274 | static const struct file_operations visorchipset_fops = { | |
2275 | .owner = THIS_MODULE, | |
2276 | .open = visorchipset_open, | |
2277 | .read = NULL, | |
2278 | .write = NULL, | |
2279 | .unlocked_ioctl = visorchipset_ioctl, | |
2280 | .release = visorchipset_release, | |
2281 | .mmap = visorchipset_mmap, | |
2282 | }; | |
2283 | ||
0f570fc0 | 2284 | static int |
e3420ed6 EA |
2285 | visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) |
2286 | { | |
2287 | int rc = 0; | |
2288 | ||
2289 | file_controlvm_channel = controlvm_channel; | |
2290 | cdev_init(&file_cdev, &visorchipset_fops); | |
2291 | file_cdev.owner = THIS_MODULE; | |
2292 | if (MAJOR(major_dev) == 0) { | |
46168810 | 2293 | rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset"); |
e3420ed6 EA |
2294 | /* dynamic major device number registration required */ |
2295 | if (rc < 0) | |
2296 | return rc; | |
2297 | } else { | |
2298 | /* static major device number registration required */ | |
46168810 | 2299 | rc = register_chrdev_region(major_dev, 1, "visorchipset"); |
e3420ed6 EA |
2300 | if (rc < 0) |
2301 | return rc; | |
2302 | } | |
2303 | rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); | |
2304 | if (rc < 0) { | |
2305 | unregister_chrdev_region(major_dev, 1); | |
2306 | return rc; | |
2307 | } | |
2308 | return 0; | |
2309 | } | |
2310 | ||
55c67dca PB |
2311 | static int |
2312 | visorchipset_init(struct acpi_device *acpi_device) | |
12e364b9 | 2313 | { |
33078257 | 2314 | int rc = 0; |
d5b3f1dc | 2315 | u64 addr; |
d3368a58 JS |
2316 | uuid_le uuid = SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID; |
2317 | ||
2318 | addr = controlvm_get_channel_address(); | |
2319 | if (!addr) | |
2320 | return -ENODEV; | |
12e364b9 | 2321 | |
4da3336c | 2322 | memset(&busdev_notifiers, 0, sizeof(busdev_notifiers)); |
84982fbf | 2323 | memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); |
12e364b9 | 2324 | |
c732623b | 2325 | controlvm_channel = visorchannel_create_with_lock(addr, 0, |
d3368a58 | 2326 | GFP_KERNEL, uuid); |
c732623b TS |
2327 | if (!controlvm_channel) |
2328 | return -ENODEV; | |
d3368a58 JS |
2329 | if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( |
2330 | visorchannel_get_header(controlvm_channel))) { | |
2331 | initialize_controlvm_payload(); | |
8a1182eb | 2332 | } else { |
d3368a58 JS |
2333 | visorchannel_destroy(controlvm_channel); |
2334 | controlvm_channel = NULL; | |
8a1182eb BR |
2335 | return -ENODEV; |
2336 | } | |
2337 | ||
5aa8ae57 BR |
2338 | major_dev = MKDEV(visorchipset_major, 0); |
2339 | rc = visorchipset_file_init(major_dev, &controlvm_channel); | |
4cb005a9 | 2340 | if (rc < 0) { |
4cb005a9 | 2341 | POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); |
a6a3989b | 2342 | goto cleanup; |
4cb005a9 | 2343 | } |
9f8d0e8b | 2344 | |
da021f02 | 2345 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2346 | |
4da3336c DK |
2347 | /* if booting in a crash kernel */ |
2348 | if (is_kdump_kernel()) | |
2349 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2350 | setup_crash_devices_work_queue); | |
2351 | else | |
2352 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2353 | controlvm_periodic_work); | |
4da3336c | 2354 | |
4da3336c DK |
2355 | most_recent_message_jiffies = jiffies; |
2356 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
0bde2979 | 2357 | schedule_delayed_work(&periodic_controlvm_work, poll_jiffies); |
12e364b9 | 2358 | |
eb34e877 BR |
2359 | visorchipset_platform_device.dev.devt = major_dev; |
2360 | if (platform_device_register(&visorchipset_platform_device) < 0) { | |
4cb005a9 | 2361 | POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); |
fbd91616 | 2362 | rc = -ENODEV; |
a6a3989b | 2363 | goto cleanup; |
4cb005a9 | 2364 | } |
12e364b9 | 2365 | POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); |
c79b28f7 PB |
2366 | |
2367 | rc = visorbus_init(); | |
a6a3989b | 2368 | cleanup: |
12e364b9 | 2369 | if (rc) { |
12e364b9 KC |
2370 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, |
2371 | POSTCODE_SEVERITY_ERR); | |
2372 | } | |
2373 | return rc; | |
2374 | } | |
2375 | ||
0f570fc0 | 2376 | static void |
e3420ed6 EA |
2377 | visorchipset_file_cleanup(dev_t major_dev) |
2378 | { | |
2379 | if (file_cdev.ops) | |
2380 | cdev_del(&file_cdev); | |
2381 | file_cdev.ops = NULL; | |
2382 | unregister_chrdev_region(major_dev, 1); | |
2383 | } | |
2384 | ||
55c67dca PB |
2385 | static int |
2386 | visorchipset_exit(struct acpi_device *acpi_device) | |
12e364b9 | 2387 | { |
12e364b9 KC |
2388 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2389 | ||
c79b28f7 PB |
2390 | visorbus_exit(); |
2391 | ||
0bde2979 | 2392 | cancel_delayed_work_sync(&periodic_controlvm_work); |
4da3336c | 2393 | destroy_controlvm_payload_info(&controlvm_payload_info); |
1783319f | 2394 | |
da021f02 | 2395 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2396 | |
c3d9a224 | 2397 | visorchannel_destroy(controlvm_channel); |
8a1182eb | 2398 | |
addceb12 | 2399 | visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); |
04dacacc | 2400 | platform_device_unregister(&visorchipset_platform_device); |
12e364b9 | 2401 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
55c67dca PB |
2402 | |
2403 | return 0; | |
2404 | } | |
2405 | ||
2406 | static const struct acpi_device_id unisys_device_ids[] = { | |
2407 | {"PNP0A07", 0}, | |
2408 | {"", 0}, | |
2409 | }; | |
55c67dca PB |
2410 | |
2411 | static struct acpi_driver unisys_acpi_driver = { | |
2412 | .name = "unisys_acpi", | |
2413 | .class = "unisys_acpi_class", | |
2414 | .owner = THIS_MODULE, | |
2415 | .ids = unisys_device_ids, | |
2416 | .ops = { | |
2417 | .add = visorchipset_init, | |
2418 | .remove = visorchipset_exit, | |
2419 | }, | |
2420 | }; | |
1fc07f99 DK |
2421 | |
2422 | MODULE_DEVICE_TABLE(acpi, unisys_device_ids); | |
2423 | ||
d5b3f1dc EA |
2424 | static __init uint32_t visorutil_spar_detect(void) |
2425 | { | |
2426 | unsigned int eax, ebx, ecx, edx; | |
2427 | ||
0c9f3536 | 2428 | if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) { |
d5b3f1dc EA |
2429 | /* check the ID */ |
2430 | cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx); | |
2431 | return (ebx == UNISYS_SPAR_ID_EBX) && | |
2432 | (ecx == UNISYS_SPAR_ID_ECX) && | |
2433 | (edx == UNISYS_SPAR_ID_EDX); | |
2434 | } else { | |
2435 | return 0; | |
2436 | } | |
2437 | } | |
55c67dca PB |
2438 | |
2439 | static int init_unisys(void) | |
2440 | { | |
2441 | int result; | |
35e606de | 2442 | |
d5b3f1dc | 2443 | if (!visorutil_spar_detect()) |
55c67dca PB |
2444 | return -ENODEV; |
2445 | ||
2446 | result = acpi_bus_register_driver(&unisys_acpi_driver); | |
2447 | if (result) | |
2448 | return -ENODEV; | |
2449 | ||
2450 | pr_info("Unisys Visorchipset Driver Loaded.\n"); | |
2451 | return 0; | |
2452 | }; | |
2453 | ||
2454 | static void exit_unisys(void) | |
2455 | { | |
2456 | acpi_bus_unregister_driver(&unisys_acpi_driver); | |
12e364b9 KC |
2457 | } |
2458 | ||
12e364b9 | 2459 | module_param_named(major, visorchipset_major, int, S_IRUGO); |
b615d628 JS |
2460 | MODULE_PARM_DESC(visorchipset_major, |
2461 | "major device number to use for the device node"); | |
4da3336c DK |
2462 | module_param_named(visorbusregwait, visorchipset_visorbusregwait, int, S_IRUGO); |
2463 | MODULE_PARM_DESC(visorchipset_visorbusreqwait, | |
12e364b9 | 2464 | "1 to have the module wait for the visor bus to register"); |
12e364b9 KC |
2465 | module_param_named(holdchipsetready, visorchipset_holdchipsetready, |
2466 | int, S_IRUGO); | |
2467 | MODULE_PARM_DESC(visorchipset_holdchipsetready, | |
2468 | "1 to hold response to CHIPSET_READY"); | |
b615d628 | 2469 | |
55c67dca PB |
2470 | module_init(init_unisys); |
2471 | module_exit(exit_unisys); | |
12e364b9 KC |
2472 | |
2473 | MODULE_AUTHOR("Unisys"); | |
2474 | MODULE_LICENSE("GPL"); | |
2475 | MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " | |
2476 | VERSION); | |
2477 | MODULE_VERSION(VERSION); |