Commit | Line | Data |
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12e364b9 KC |
1 | /* visorchipset_main.c |
2 | * | |
f6d0c1e6 | 3 | * Copyright (C) 2010 - 2013 UNISYS CORPORATION |
12e364b9 KC |
4 | * All rights reserved. |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or (at | |
9 | * your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
14 | * NON INFRINGEMENT. See the GNU General Public License for more | |
15 | * details. | |
16 | */ | |
17 | ||
55c67dca | 18 | #include <linux/acpi.h> |
c0a14641 | 19 | #include <linux/cdev.h> |
46168810 | 20 | #include <linux/ctype.h> |
e3420ed6 EA |
21 | #include <linux/fs.h> |
22 | #include <linux/mm.h> | |
12e364b9 KC |
23 | #include <linux/nls.h> |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/platform_device.h> | |
90addb02 | 26 | #include <linux/uuid.h> |
1ba00980 | 27 | #include <linux/crash_dump.h> |
12e364b9 | 28 | |
5f3a7e36 | 29 | #include "channel_guid.h" |
55c67dca PB |
30 | #include "controlvmchannel.h" |
31 | #include "controlvmcompletionstatus.h" | |
32 | #include "guestlinuxdebug.h" | |
33 | #include "periodic_work.h" | |
55c67dca PB |
34 | #include "version.h" |
35 | #include "visorbus.h" | |
36 | #include "visorbus_private.h" | |
5f3a7e36 | 37 | #include "vmcallinterface.h" |
55c67dca | 38 | |
12e364b9 | 39 | #define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c |
12e364b9 KC |
40 | |
41 | #define MAX_NAME_SIZE 128 | |
42 | #define MAX_IP_SIZE 50 | |
43 | #define MAXOUTSTANDINGCHANNELCOMMAND 256 | |
44 | #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 | |
45 | #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 | |
46 | ||
46168810 | 47 | #define MAX_CONTROLVM_PAYLOAD_BYTES (1024*128) |
2ee0deec PB |
48 | |
49 | #define VISORCHIPSET_MMAP_CONTROLCHANOFFSET 0x00000000 | |
50 | ||
d5b3f1dc EA |
51 | |
52 | #define UNISYS_SPAR_LEAF_ID 0x40000000 | |
53 | ||
54 | /* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ | |
55 | #define UNISYS_SPAR_ID_EBX 0x73696e55 | |
56 | #define UNISYS_SPAR_ID_ECX 0x70537379 | |
57 | #define UNISYS_SPAR_ID_EDX 0x34367261 | |
58 | ||
b615d628 JS |
59 | /* |
60 | * Module parameters | |
61 | */ | |
b615d628 | 62 | static int visorchipset_major; |
4da3336c | 63 | static int visorchipset_visorbusregwait = 1; /* default is on */ |
b615d628 | 64 | static int visorchipset_holdchipsetready; |
46168810 | 65 | static unsigned long controlvm_payload_bytes_buffered; |
b615d628 | 66 | |
e3420ed6 EA |
67 | static int |
68 | visorchipset_open(struct inode *inode, struct file *file) | |
69 | { | |
70 | unsigned minor_number = iminor(inode); | |
71 | ||
72 | if (minor_number) | |
73 | return -ENODEV; | |
74 | file->private_data = NULL; | |
75 | return 0; | |
76 | } | |
77 | ||
78 | static int | |
79 | visorchipset_release(struct inode *inode, struct file *file) | |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
12e364b9 KC |
84 | /* When the controlvm channel is idle for at least MIN_IDLE_SECONDS, |
85 | * we switch to slow polling mode. As soon as we get a controlvm | |
86 | * message, we switch back to fast polling mode. | |
87 | */ | |
88 | #define MIN_IDLE_SECONDS 10 | |
52063eca JS |
89 | static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
90 | static unsigned long most_recent_message_jiffies; /* when we got our last | |
bd5b9b32 | 91 | * controlvm message */ |
4da3336c | 92 | static int visorbusregistered; |
12e364b9 KC |
93 | |
94 | #define MAX_CHIPSET_EVENTS 2 | |
c242233e | 95 | static u8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 0 }; |
12e364b9 | 96 | |
46168810 EA |
97 | struct parser_context { |
98 | unsigned long allocbytes; | |
99 | unsigned long param_bytes; | |
100 | u8 *curr; | |
101 | unsigned long bytes_remaining; | |
102 | bool byte_stream; | |
103 | char data[0]; | |
104 | }; | |
105 | ||
9232d2d6 BR |
106 | static struct delayed_work periodic_controlvm_work; |
107 | static struct workqueue_struct *periodic_controlvm_workqueue; | |
8f1947ac | 108 | static DEFINE_SEMAPHORE(notifier_lock); |
12e364b9 | 109 | |
e3420ed6 EA |
110 | static struct cdev file_cdev; |
111 | static struct visorchannel **file_controlvm_channel; | |
da021f02 | 112 | static struct controlvm_message_header g_chipset_msg_hdr; |
59827f00 | 113 | static const uuid_le spar_diag_pool_channel_protocol_uuid = |
9eee5d1f | 114 | SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID; |
12e364b9 | 115 | /* 0xffffff is an invalid Bus/Device number */ |
52063eca JS |
116 | static u32 g_diagpool_bus_no = 0xffffff; |
117 | static u32 g_diagpool_dev_no = 0xffffff; | |
4f44b72d | 118 | static struct controlvm_message_packet g_devicechangestate_packet; |
12e364b9 | 119 | |
12e364b9 | 120 | #define is_diagpool_channel(channel_type_guid) \ |
59827f00 BR |
121 | (uuid_le_cmp(channel_type_guid,\ |
122 | spar_diag_pool_channel_protocol_uuid) == 0) | |
12e364b9 | 123 | |
1390b88c BR |
124 | static LIST_HEAD(bus_info_list); |
125 | static LIST_HEAD(dev_info_list); | |
12e364b9 | 126 | |
c3d9a224 | 127 | static struct visorchannel *controlvm_channel; |
12e364b9 | 128 | |
84982fbf | 129 | /* Manages the request payload in the controlvm channel */ |
c1f834eb | 130 | struct visor_controlvm_payload_info { |
c242233e | 131 | u8 __iomem *ptr; /* pointer to base address of payload pool */ |
5fc0229a | 132 | u64 offset; /* offset from beginning of controlvm |
12e364b9 | 133 | * channel to beginning of payload * pool */ |
b3c55b13 | 134 | u32 bytes; /* number of bytes in payload pool */ |
c1f834eb JS |
135 | }; |
136 | ||
137 | static struct visor_controlvm_payload_info controlvm_payload_info; | |
12e364b9 | 138 | |
12e364b9 KC |
139 | /* The following globals are used to handle the scenario where we are unable to |
140 | * offload the payload from a controlvm message due to memory requirements. In | |
141 | * this scenario, we simply stash the controlvm message, then attempt to | |
142 | * process it again the next time controlvm_periodic_work() runs. | |
143 | */ | |
7166ed19 | 144 | static struct controlvm_message controlvm_pending_msg; |
c79b28f7 | 145 | static bool controlvm_pending_msg_valid; |
12e364b9 | 146 | |
12e364b9 KC |
147 | /* This identifies a data buffer that has been received via a controlvm messages |
148 | * in a remote --> local CONTROLVM_TRANSMIT_FILE conversation. | |
149 | */ | |
150 | struct putfile_buffer_entry { | |
151 | struct list_head next; /* putfile_buffer_entry list */ | |
317d9614 | 152 | struct parser_context *parser_ctx; /* points to input data buffer */ |
12e364b9 KC |
153 | }; |
154 | ||
155 | /* List of struct putfile_request *, via next_putfile_request member. | |
156 | * Each entry in this list identifies an outstanding TRANSMIT_FILE | |
157 | * conversation. | |
158 | */ | |
1eee0011 | 159 | static LIST_HEAD(putfile_request_list); |
12e364b9 KC |
160 | |
161 | /* This describes a buffer and its current state of transfer (e.g., how many | |
162 | * bytes have already been supplied as putfile data, and how many bytes are | |
163 | * remaining) for a putfile_request. | |
164 | */ | |
165 | struct putfile_active_buffer { | |
166 | /* a payload from a controlvm message, containing a file data buffer */ | |
317d9614 | 167 | struct parser_context *parser_ctx; |
12e364b9 KC |
168 | /* points within data area of parser_ctx to next byte of data */ |
169 | u8 *pnext; | |
170 | /* # bytes left from <pnext> to the end of this data buffer */ | |
171 | size_t bytes_remaining; | |
172 | }; | |
173 | ||
174 | #define PUTFILE_REQUEST_SIG 0x0906101302281211 | |
175 | /* This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE | |
176 | * conversation. Structs of this type are dynamically linked into | |
177 | * <Putfile_request_list>. | |
178 | */ | |
179 | struct putfile_request { | |
180 | u64 sig; /* PUTFILE_REQUEST_SIG */ | |
181 | ||
182 | /* header from original TransmitFile request */ | |
98d7b594 | 183 | struct controlvm_message_header controlvm_header; |
12e364b9 KC |
184 | u64 file_request_number; /* from original TransmitFile request */ |
185 | ||
186 | /* link to next struct putfile_request */ | |
187 | struct list_head next_putfile_request; | |
188 | ||
189 | /* most-recent sequence number supplied via a controlvm message */ | |
190 | u64 data_sequence_number; | |
191 | ||
192 | /* head of putfile_buffer_entry list, which describes the data to be | |
193 | * supplied as putfile data; | |
194 | * - this list is added to when controlvm messages come in that supply | |
195 | * file data | |
196 | * - this list is removed from via the hotplug program that is actually | |
197 | * consuming these buffers to write as file data */ | |
198 | struct list_head input_buffer_list; | |
199 | spinlock_t req_list_lock; /* lock for input_buffer_list */ | |
200 | ||
201 | /* waiters for input_buffer_list to go non-empty */ | |
202 | wait_queue_head_t input_buffer_wq; | |
203 | ||
204 | /* data not yet read within current putfile_buffer_entry */ | |
205 | struct putfile_active_buffer active_buf; | |
206 | ||
207 | /* <0 = failed, 0 = in-progress, >0 = successful; */ | |
208 | /* note that this must be set with req_list_lock, and if you set <0, */ | |
209 | /* it is your responsibility to also free up all of the other objects */ | |
210 | /* in this struct (like input_buffer_list, active_buf.parser_ctx) */ | |
211 | /* before releasing the lock */ | |
212 | int completion_status; | |
213 | }; | |
214 | ||
12e364b9 KC |
215 | struct parahotplug_request { |
216 | struct list_head list; | |
217 | int id; | |
218 | unsigned long expiration; | |
3ab47701 | 219 | struct controlvm_message msg; |
12e364b9 KC |
220 | }; |
221 | ||
ddf5de53 BR |
222 | static LIST_HEAD(parahotplug_request_list); |
223 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ | |
12e364b9 KC |
224 | static void parahotplug_process_list(void); |
225 | ||
226 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / | |
227 | * CONTROLVM_REPORTEVENT. | |
228 | */ | |
4da3336c | 229 | static struct visorchipset_busdev_notifiers busdev_notifiers; |
12e364b9 | 230 | |
3032aedd DZ |
231 | static void bus_create_response(struct visorchipset_bus_info *p, int response); |
232 | static void bus_destroy_response(struct visorchipset_bus_info *p, int response); | |
b4b598fd DZ |
233 | static void device_create_response(struct visorchipset_device_info *p, |
234 | int response); | |
235 | static void device_destroy_response(struct visorchipset_device_info *p, | |
236 | int response); | |
237 | static void device_resume_response(struct visorchipset_device_info *p, | |
238 | int response); | |
12e364b9 | 239 | |
b4b598fd DZ |
240 | static void |
241 | visorchipset_device_pause_response(struct visorchipset_device_info *p, | |
242 | int response); | |
2ee0deec | 243 | |
8e3fedd6 | 244 | static struct visorchipset_busdev_responders busdev_responders = { |
12e364b9 KC |
245 | .bus_create = bus_create_response, |
246 | .bus_destroy = bus_destroy_response, | |
247 | .device_create = device_create_response, | |
248 | .device_destroy = device_destroy_response, | |
927c7927 | 249 | .device_pause = visorchipset_device_pause_response, |
12e364b9 KC |
250 | .device_resume = device_resume_response, |
251 | }; | |
252 | ||
253 | /* info for /dev/visorchipset */ | |
5aa8ae57 | 254 | static dev_t major_dev = -1; /**< indicates major num for device */ |
12e364b9 | 255 | |
19f6634f BR |
256 | /* prototypes for attributes */ |
257 | static ssize_t toolaction_show(struct device *dev, | |
8e76e695 | 258 | struct device_attribute *attr, char *buf); |
19f6634f | 259 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 BR |
260 | struct device_attribute *attr, |
261 | const char *buf, size_t count); | |
19f6634f BR |
262 | static DEVICE_ATTR_RW(toolaction); |
263 | ||
54b31229 | 264 | static ssize_t boottotool_show(struct device *dev, |
8e76e695 | 265 | struct device_attribute *attr, char *buf); |
54b31229 | 266 | static ssize_t boottotool_store(struct device *dev, |
8e76e695 BR |
267 | struct device_attribute *attr, const char *buf, |
268 | size_t count); | |
54b31229 BR |
269 | static DEVICE_ATTR_RW(boottotool); |
270 | ||
422af17c | 271 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8e76e695 | 272 | char *buf); |
422af17c | 273 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 274 | const char *buf, size_t count); |
422af17c BR |
275 | static DEVICE_ATTR_RW(error); |
276 | ||
277 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 278 | char *buf); |
422af17c | 279 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 280 | const char *buf, size_t count); |
422af17c BR |
281 | static DEVICE_ATTR_RW(textid); |
282 | ||
283 | static ssize_t remaining_steps_show(struct device *dev, | |
8e76e695 | 284 | struct device_attribute *attr, char *buf); |
422af17c | 285 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 BR |
286 | struct device_attribute *attr, |
287 | const char *buf, size_t count); | |
422af17c BR |
288 | static DEVICE_ATTR_RW(remaining_steps); |
289 | ||
18b87ed1 | 290 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
291 | struct device_attribute *attr, |
292 | const char *buf, size_t count); | |
18b87ed1 BR |
293 | static DEVICE_ATTR_WO(chipsetready); |
294 | ||
e56fa7cd | 295 | static ssize_t devicedisabled_store(struct device *dev, |
8e76e695 BR |
296 | struct device_attribute *attr, |
297 | const char *buf, size_t count); | |
e56fa7cd BR |
298 | static DEVICE_ATTR_WO(devicedisabled); |
299 | ||
300 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
301 | struct device_attribute *attr, |
302 | const char *buf, size_t count); | |
e56fa7cd BR |
303 | static DEVICE_ATTR_WO(deviceenabled); |
304 | ||
19f6634f BR |
305 | static struct attribute *visorchipset_install_attrs[] = { |
306 | &dev_attr_toolaction.attr, | |
54b31229 | 307 | &dev_attr_boottotool.attr, |
422af17c BR |
308 | &dev_attr_error.attr, |
309 | &dev_attr_textid.attr, | |
310 | &dev_attr_remaining_steps.attr, | |
19f6634f BR |
311 | NULL |
312 | }; | |
313 | ||
314 | static struct attribute_group visorchipset_install_group = { | |
315 | .name = "install", | |
316 | .attrs = visorchipset_install_attrs | |
317 | }; | |
318 | ||
18b87ed1 BR |
319 | static struct attribute *visorchipset_guest_attrs[] = { |
320 | &dev_attr_chipsetready.attr, | |
321 | NULL | |
322 | }; | |
323 | ||
324 | static struct attribute_group visorchipset_guest_group = { | |
325 | .name = "guest", | |
326 | .attrs = visorchipset_guest_attrs | |
327 | }; | |
328 | ||
e56fa7cd BR |
329 | static struct attribute *visorchipset_parahotplug_attrs[] = { |
330 | &dev_attr_devicedisabled.attr, | |
331 | &dev_attr_deviceenabled.attr, | |
332 | NULL | |
333 | }; | |
334 | ||
335 | static struct attribute_group visorchipset_parahotplug_group = { | |
336 | .name = "parahotplug", | |
337 | .attrs = visorchipset_parahotplug_attrs | |
338 | }; | |
339 | ||
19f6634f BR |
340 | static const struct attribute_group *visorchipset_dev_groups[] = { |
341 | &visorchipset_install_group, | |
18b87ed1 | 342 | &visorchipset_guest_group, |
e56fa7cd | 343 | &visorchipset_parahotplug_group, |
19f6634f BR |
344 | NULL |
345 | }; | |
346 | ||
12e364b9 | 347 | /* /sys/devices/platform/visorchipset */ |
eb34e877 | 348 | static struct platform_device visorchipset_platform_device = { |
12e364b9 KC |
349 | .name = "visorchipset", |
350 | .id = -1, | |
19f6634f | 351 | .dev.groups = visorchipset_dev_groups, |
12e364b9 KC |
352 | }; |
353 | ||
354 | /* Function prototypes */ | |
b3168c70 | 355 | static void controlvm_respond(struct controlvm_message_header *msg_hdr, |
98d7b594 BR |
356 | int response); |
357 | static void controlvm_respond_chipset_init( | |
b3168c70 | 358 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 BR |
359 | enum ultra_chipset_feature features); |
360 | static void controlvm_respond_physdev_changestate( | |
b3168c70 | 361 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 362 | struct spar_segment_state state); |
12e364b9 | 363 | |
46168810 | 364 | |
2ee0deec PB |
365 | static void parser_done(struct parser_context *ctx); |
366 | ||
46168810 | 367 | static struct parser_context * |
fbf35536 | 368 | parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry) |
46168810 EA |
369 | { |
370 | int allocbytes = sizeof(struct parser_context) + bytes; | |
371 | struct parser_context *rc = NULL; | |
372 | struct parser_context *ctx = NULL; | |
46168810 EA |
373 | |
374 | if (retry) | |
375 | *retry = false; | |
cc55b5c5 JS |
376 | |
377 | /* | |
378 | * alloc an 0 extra byte to ensure payload is | |
379 | * '\0'-terminated | |
380 | */ | |
381 | allocbytes++; | |
46168810 EA |
382 | if ((controlvm_payload_bytes_buffered + bytes) |
383 | > MAX_CONTROLVM_PAYLOAD_BYTES) { | |
384 | if (retry) | |
385 | *retry = true; | |
386 | rc = NULL; | |
387 | goto cleanup; | |
388 | } | |
389 | ctx = kzalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY); | |
390 | if (!ctx) { | |
391 | if (retry) | |
392 | *retry = true; | |
393 | rc = NULL; | |
394 | goto cleanup; | |
395 | } | |
396 | ||
397 | ctx->allocbytes = allocbytes; | |
398 | ctx->param_bytes = bytes; | |
399 | ctx->curr = NULL; | |
400 | ctx->bytes_remaining = 0; | |
401 | ctx->byte_stream = false; | |
402 | if (local) { | |
403 | void *p; | |
404 | ||
405 | if (addr > virt_to_phys(high_memory - 1)) { | |
406 | rc = NULL; | |
407 | goto cleanup; | |
408 | } | |
409 | p = __va((unsigned long) (addr)); | |
410 | memcpy(ctx->data, p, bytes); | |
411 | } else { | |
dd412751 JS |
412 | void __iomem *mapping; |
413 | ||
414 | if (!request_mem_region(addr, bytes, "visorchipset")) { | |
46168810 EA |
415 | rc = NULL; |
416 | goto cleanup; | |
417 | } | |
712c03dc | 418 | |
dd412751 JS |
419 | mapping = ioremap_cache(addr, bytes); |
420 | if (!mapping) { | |
421 | release_mem_region(addr, bytes); | |
46168810 EA |
422 | rc = NULL; |
423 | goto cleanup; | |
424 | } | |
dd412751 JS |
425 | memcpy_fromio(ctx->data, mapping, bytes); |
426 | release_mem_region(addr, bytes); | |
46168810 | 427 | } |
46168810 | 428 | |
cc55b5c5 | 429 | ctx->byte_stream = true; |
46168810 EA |
430 | rc = ctx; |
431 | cleanup: | |
46168810 EA |
432 | if (rc) { |
433 | controlvm_payload_bytes_buffered += ctx->param_bytes; | |
434 | } else { | |
435 | if (ctx) { | |
436 | parser_done(ctx); | |
437 | ctx = NULL; | |
438 | } | |
439 | } | |
440 | return rc; | |
441 | } | |
442 | ||
464129ed | 443 | static uuid_le |
46168810 EA |
444 | parser_id_get(struct parser_context *ctx) |
445 | { | |
446 | struct spar_controlvm_parameters_header *phdr = NULL; | |
447 | ||
448 | if (ctx == NULL) | |
449 | return NULL_UUID_LE; | |
450 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
451 | return phdr->id; | |
452 | } | |
453 | ||
2ee0deec PB |
454 | /** Describes the state from the perspective of which controlvm messages have |
455 | * been received for a bus or device. | |
456 | */ | |
457 | ||
458 | enum PARSER_WHICH_STRING { | |
459 | PARSERSTRING_INITIATOR, | |
460 | PARSERSTRING_TARGET, | |
461 | PARSERSTRING_CONNECTION, | |
462 | PARSERSTRING_NAME, /* TODO: only PARSERSTRING_NAME is used ? */ | |
463 | }; | |
464 | ||
464129ed | 465 | static void |
2ee0deec PB |
466 | parser_param_start(struct parser_context *ctx, |
467 | enum PARSER_WHICH_STRING which_string) | |
46168810 EA |
468 | { |
469 | struct spar_controlvm_parameters_header *phdr = NULL; | |
470 | ||
471 | if (ctx == NULL) | |
472 | goto Away; | |
473 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
474 | switch (which_string) { | |
475 | case PARSERSTRING_INITIATOR: | |
476 | ctx->curr = ctx->data + phdr->initiator_offset; | |
477 | ctx->bytes_remaining = phdr->initiator_length; | |
478 | break; | |
479 | case PARSERSTRING_TARGET: | |
480 | ctx->curr = ctx->data + phdr->target_offset; | |
481 | ctx->bytes_remaining = phdr->target_length; | |
482 | break; | |
483 | case PARSERSTRING_CONNECTION: | |
484 | ctx->curr = ctx->data + phdr->connection_offset; | |
485 | ctx->bytes_remaining = phdr->connection_length; | |
486 | break; | |
487 | case PARSERSTRING_NAME: | |
488 | ctx->curr = ctx->data + phdr->name_offset; | |
489 | ctx->bytes_remaining = phdr->name_length; | |
490 | break; | |
491 | default: | |
492 | break; | |
493 | } | |
494 | ||
495 | Away: | |
496 | return; | |
497 | } | |
498 | ||
464129ed | 499 | static void parser_done(struct parser_context *ctx) |
46168810 EA |
500 | { |
501 | if (!ctx) | |
502 | return; | |
503 | controlvm_payload_bytes_buffered -= ctx->param_bytes; | |
504 | kfree(ctx); | |
505 | } | |
506 | ||
464129ed | 507 | static void * |
46168810 EA |
508 | parser_string_get(struct parser_context *ctx) |
509 | { | |
510 | u8 *pscan; | |
511 | unsigned long nscan; | |
512 | int value_length = -1; | |
513 | void *value = NULL; | |
514 | int i; | |
515 | ||
516 | if (!ctx) | |
517 | return NULL; | |
518 | pscan = ctx->curr; | |
519 | nscan = ctx->bytes_remaining; | |
520 | if (nscan == 0) | |
521 | return NULL; | |
522 | if (!pscan) | |
523 | return NULL; | |
524 | for (i = 0, value_length = -1; i < nscan; i++) | |
525 | if (pscan[i] == '\0') { | |
526 | value_length = i; | |
527 | break; | |
528 | } | |
529 | if (value_length < 0) /* '\0' was not included in the length */ | |
530 | value_length = nscan; | |
531 | value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY); | |
532 | if (value == NULL) | |
533 | return NULL; | |
534 | if (value_length > 0) | |
535 | memcpy(value, pscan, value_length); | |
536 | ((u8 *) (value))[value_length] = '\0'; | |
537 | return value; | |
538 | } | |
539 | ||
540 | ||
d746cb55 VB |
541 | static ssize_t toolaction_show(struct device *dev, |
542 | struct device_attribute *attr, | |
543 | char *buf) | |
19f6634f | 544 | { |
01f4d85a | 545 | u8 tool_action; |
19f6634f | 546 | |
c3d9a224 | 547 | visorchannel_read(controlvm_channel, |
d19642f6 | 548 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 | 549 | tool_action), &tool_action, sizeof(u8)); |
01f4d85a | 550 | return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action); |
19f6634f BR |
551 | } |
552 | ||
d746cb55 VB |
553 | static ssize_t toolaction_store(struct device *dev, |
554 | struct device_attribute *attr, | |
555 | const char *buf, size_t count) | |
19f6634f | 556 | { |
01f4d85a | 557 | u8 tool_action; |
66e24b76 | 558 | int ret; |
19f6634f | 559 | |
ebec8967 | 560 | if (kstrtou8(buf, 10, &tool_action)) |
66e24b76 BR |
561 | return -EINVAL; |
562 | ||
c3d9a224 | 563 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
564 | offsetof(struct spar_controlvm_channel_protocol, |
565 | tool_action), | |
01f4d85a | 566 | &tool_action, sizeof(u8)); |
66e24b76 BR |
567 | |
568 | if (ret) | |
569 | return ret; | |
e22a4a0f | 570 | return count; |
19f6634f BR |
571 | } |
572 | ||
d746cb55 VB |
573 | static ssize_t boottotool_show(struct device *dev, |
574 | struct device_attribute *attr, | |
575 | char *buf) | |
54b31229 | 576 | { |
365522d9 | 577 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 578 | |
c3d9a224 | 579 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
580 | offsetof(struct spar_controlvm_channel_protocol, |
581 | efi_spar_ind), &efi_spar_indication, | |
582 | sizeof(struct efi_spar_indication)); | |
54b31229 | 583 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
8e76e695 | 584 | efi_spar_indication.boot_to_tool); |
54b31229 BR |
585 | } |
586 | ||
d746cb55 VB |
587 | static ssize_t boottotool_store(struct device *dev, |
588 | struct device_attribute *attr, | |
589 | const char *buf, size_t count) | |
54b31229 | 590 | { |
66e24b76 | 591 | int val, ret; |
365522d9 | 592 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 593 | |
ebec8967 | 594 | if (kstrtoint(buf, 10, &val)) |
66e24b76 BR |
595 | return -EINVAL; |
596 | ||
365522d9 | 597 | efi_spar_indication.boot_to_tool = val; |
c3d9a224 | 598 | ret = visorchannel_write(controlvm_channel, |
d19642f6 | 599 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 BR |
600 | efi_spar_ind), &(efi_spar_indication), |
601 | sizeof(struct efi_spar_indication)); | |
66e24b76 BR |
602 | |
603 | if (ret) | |
604 | return ret; | |
e22a4a0f | 605 | return count; |
54b31229 | 606 | } |
422af17c BR |
607 | |
608 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 609 | char *buf) |
422af17c BR |
610 | { |
611 | u32 error; | |
612 | ||
8e76e695 BR |
613 | visorchannel_read(controlvm_channel, |
614 | offsetof(struct spar_controlvm_channel_protocol, | |
615 | installation_error), | |
616 | &error, sizeof(u32)); | |
422af17c BR |
617 | return scnprintf(buf, PAGE_SIZE, "%i\n", error); |
618 | } | |
619 | ||
620 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 621 | const char *buf, size_t count) |
422af17c BR |
622 | { |
623 | u32 error; | |
66e24b76 | 624 | int ret; |
422af17c | 625 | |
ebec8967 | 626 | if (kstrtou32(buf, 10, &error)) |
66e24b76 BR |
627 | return -EINVAL; |
628 | ||
c3d9a224 | 629 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
630 | offsetof(struct spar_controlvm_channel_protocol, |
631 | installation_error), | |
632 | &error, sizeof(u32)); | |
66e24b76 BR |
633 | if (ret) |
634 | return ret; | |
e22a4a0f | 635 | return count; |
422af17c BR |
636 | } |
637 | ||
638 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 639 | char *buf) |
422af17c | 640 | { |
10dbf0e3 | 641 | u32 text_id; |
422af17c | 642 | |
8e76e695 BR |
643 | visorchannel_read(controlvm_channel, |
644 | offsetof(struct spar_controlvm_channel_protocol, | |
645 | installation_text_id), | |
646 | &text_id, sizeof(u32)); | |
10dbf0e3 | 647 | return scnprintf(buf, PAGE_SIZE, "%i\n", text_id); |
422af17c BR |
648 | } |
649 | ||
650 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 651 | const char *buf, size_t count) |
422af17c | 652 | { |
10dbf0e3 | 653 | u32 text_id; |
66e24b76 | 654 | int ret; |
422af17c | 655 | |
ebec8967 | 656 | if (kstrtou32(buf, 10, &text_id)) |
66e24b76 BR |
657 | return -EINVAL; |
658 | ||
c3d9a224 | 659 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
660 | offsetof(struct spar_controlvm_channel_protocol, |
661 | installation_text_id), | |
662 | &text_id, sizeof(u32)); | |
66e24b76 BR |
663 | if (ret) |
664 | return ret; | |
e22a4a0f | 665 | return count; |
422af17c BR |
666 | } |
667 | ||
422af17c | 668 | static ssize_t remaining_steps_show(struct device *dev, |
8e76e695 | 669 | struct device_attribute *attr, char *buf) |
422af17c | 670 | { |
ee8da290 | 671 | u16 remaining_steps; |
422af17c | 672 | |
c3d9a224 | 673 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
674 | offsetof(struct spar_controlvm_channel_protocol, |
675 | installation_remaining_steps), | |
676 | &remaining_steps, sizeof(u16)); | |
ee8da290 | 677 | return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps); |
422af17c BR |
678 | } |
679 | ||
680 | static ssize_t remaining_steps_store(struct device *dev, | |
8e76e695 BR |
681 | struct device_attribute *attr, |
682 | const char *buf, size_t count) | |
422af17c | 683 | { |
ee8da290 | 684 | u16 remaining_steps; |
66e24b76 | 685 | int ret; |
422af17c | 686 | |
ebec8967 | 687 | if (kstrtou16(buf, 10, &remaining_steps)) |
66e24b76 BR |
688 | return -EINVAL; |
689 | ||
c3d9a224 | 690 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
691 | offsetof(struct spar_controlvm_channel_protocol, |
692 | installation_remaining_steps), | |
693 | &remaining_steps, sizeof(u16)); | |
66e24b76 BR |
694 | if (ret) |
695 | return ret; | |
e22a4a0f | 696 | return count; |
422af17c BR |
697 | } |
698 | ||
12e364b9 | 699 | static void |
9b989a98 | 700 | bus_info_clear(void *v) |
12e364b9 | 701 | { |
bbd4be30 | 702 | struct visorchipset_bus_info *p = (struct visorchipset_bus_info *) v; |
12e364b9 | 703 | |
12e364b9 | 704 | kfree(p->name); |
12e364b9 | 705 | kfree(p->description); |
33192fa1 | 706 | memset(p, 0, sizeof(struct visorchipset_bus_info)); |
12e364b9 KC |
707 | } |
708 | ||
709 | static void | |
9b989a98 | 710 | dev_info_clear(void *v) |
12e364b9 | 711 | { |
246e0cd0 | 712 | struct visorchipset_device_info *p = |
bbd4be30 | 713 | (struct visorchipset_device_info *) v; |
26eb2c0c | 714 | |
246e0cd0 | 715 | memset(p, 0, sizeof(struct visorchipset_device_info)); |
12e364b9 KC |
716 | } |
717 | ||
ab0592b9 DZ |
718 | struct visor_busdev { |
719 | u32 bus_no; | |
720 | u32 dev_no; | |
721 | }; | |
722 | ||
723 | static int match_visorbus_dev_by_id(struct device *dev, void *data) | |
724 | { | |
725 | struct visor_device *vdev = to_visor_device(dev); | |
726 | struct visor_busdev *id = (struct visor_busdev *)data; | |
727 | u32 bus_no = id->bus_no; | |
728 | u32 dev_no = id->dev_no; | |
729 | ||
730 | if (((bus_no == -1) || (vdev->chipset_bus_no == bus_no)) && | |
731 | ((dev_no == -1) || (vdev->chipset_dev_no == dev_no))) | |
732 | return 1; | |
733 | ||
734 | return 0; | |
735 | } | |
736 | struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, | |
737 | struct visor_device *from) | |
738 | { | |
739 | struct device *dev; | |
740 | struct device *dev_start = NULL; | |
741 | struct visor_device *vdev = NULL; | |
742 | struct visor_busdev id = { | |
743 | .bus_no = bus_no, | |
744 | .dev_no = dev_no | |
745 | }; | |
746 | ||
747 | if (from) | |
748 | dev_start = &from->device; | |
749 | dev = bus_find_device(&visorbus_type, dev_start, (void *)&id, | |
750 | match_visorbus_dev_by_id); | |
751 | if (dev) | |
752 | vdev = to_visor_device(dev); | |
753 | return vdev; | |
754 | } | |
755 | EXPORT_SYMBOL(visorbus_get_device_by_id); | |
756 | ||
4f66520b JS |
757 | static struct visorchipset_bus_info * |
758 | bus_find(struct list_head *list, u32 bus_no) | |
759 | { | |
760 | struct visorchipset_bus_info *p; | |
761 | ||
762 | list_for_each_entry(p, list, entry) { | |
763 | if (p->bus_no == bus_no) | |
764 | return p; | |
765 | } | |
766 | ||
767 | return NULL; | |
768 | } | |
769 | ||
d480f6a2 JS |
770 | static struct visorchipset_device_info * |
771 | device_find(struct list_head *list, u32 bus_no, u32 dev_no) | |
772 | { | |
773 | struct visorchipset_device_info *p; | |
774 | ||
775 | list_for_each_entry(p, list, entry) { | |
776 | if (p->bus_no == bus_no && p->dev_no == dev_no) | |
777 | return p; | |
778 | } | |
779 | ||
780 | return NULL; | |
781 | } | |
782 | ||
28723521 JS |
783 | static void busdevices_del(struct list_head *list, u32 bus_no) |
784 | { | |
785 | struct visorchipset_device_info *p, *tmp; | |
786 | ||
787 | list_for_each_entry_safe(p, tmp, list, entry) { | |
788 | if (p->bus_no == bus_no) { | |
789 | list_del(&p->entry); | |
790 | kfree(p); | |
791 | } | |
792 | } | |
793 | } | |
794 | ||
c242233e | 795 | static u8 |
12e364b9 KC |
796 | check_chipset_events(void) |
797 | { | |
798 | int i; | |
c242233e | 799 | u8 send_msg = 1; |
12e364b9 KC |
800 | /* Check events to determine if response should be sent */ |
801 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
802 | send_msg &= chipset_events[i]; | |
803 | return send_msg; | |
804 | } | |
805 | ||
806 | static void | |
807 | clear_chipset_events(void) | |
808 | { | |
809 | int i; | |
810 | /* Clear chipset_events */ | |
811 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
812 | chipset_events[i] = 0; | |
813 | } | |
814 | ||
815 | void | |
4da3336c | 816 | visorchipset_register_busdev( |
fe90d892 | 817 | struct visorchipset_busdev_notifiers *notifiers, |
929aa8ae | 818 | struct visorchipset_busdev_responders *responders, |
1e7a59c1 | 819 | struct ultra_vbus_deviceinfo *driver_info) |
12e364b9 | 820 | { |
8f1947ac | 821 | down(¬ifier_lock); |
38f736e9 | 822 | if (!notifiers) { |
4da3336c DK |
823 | memset(&busdev_notifiers, 0, |
824 | sizeof(busdev_notifiers)); | |
825 | visorbusregistered = 0; /* clear flag */ | |
12e364b9 | 826 | } else { |
4da3336c DK |
827 | busdev_notifiers = *notifiers; |
828 | visorbusregistered = 1; /* set flag */ | |
12e364b9 KC |
829 | } |
830 | if (responders) | |
8e3fedd6 | 831 | *responders = busdev_responders; |
1e7a59c1 BR |
832 | if (driver_info) |
833 | bus_device_info_init(driver_info, "chipset", "visorchipset", | |
8e76e695 | 834 | VERSION, NULL); |
12e364b9 | 835 | |
8f1947ac | 836 | up(¬ifier_lock); |
12e364b9 | 837 | } |
4da3336c | 838 | EXPORT_SYMBOL_GPL(visorchipset_register_busdev); |
12e364b9 KC |
839 | |
840 | static void | |
841 | cleanup_controlvm_structures(void) | |
842 | { | |
33192fa1 | 843 | struct visorchipset_bus_info *bi, *tmp_bi; |
246e0cd0 | 844 | struct visorchipset_device_info *di, *tmp_di; |
12e364b9 | 845 | |
1390b88c | 846 | list_for_each_entry_safe(bi, tmp_bi, &bus_info_list, entry) { |
9b989a98 | 847 | bus_info_clear(bi); |
12e364b9 KC |
848 | list_del(&bi->entry); |
849 | kfree(bi); | |
850 | } | |
851 | ||
1390b88c | 852 | list_for_each_entry_safe(di, tmp_di, &dev_info_list, entry) { |
9b989a98 | 853 | dev_info_clear(di); |
12e364b9 KC |
854 | list_del(&di->entry); |
855 | kfree(di); | |
856 | } | |
857 | } | |
858 | ||
859 | static void | |
3ab47701 | 860 | chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
861 | { |
862 | static int chipset_inited; | |
b9b141e8 | 863 | enum ultra_chipset_feature features = 0; |
12e364b9 KC |
864 | int rc = CONTROLVM_RESP_SUCCESS; |
865 | ||
866 | POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
867 | if (chipset_inited) { | |
22ad57ba | 868 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
e3199b2e | 869 | goto cleanup; |
12e364b9 KC |
870 | } |
871 | chipset_inited = 1; | |
872 | POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); | |
873 | ||
874 | /* Set features to indicate we support parahotplug (if Command | |
875 | * also supports it). */ | |
876 | features = | |
2ea5117b | 877 | inmsg->cmd.init_chipset. |
12e364b9 KC |
878 | features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; |
879 | ||
880 | /* Set the "reply" bit so Command knows this is a | |
881 | * features-aware driver. */ | |
882 | features |= ULTRA_CHIPSET_FEATURE_REPLY; | |
883 | ||
e3199b2e | 884 | cleanup: |
12e364b9 KC |
885 | if (rc < 0) |
886 | cleanup_controlvm_structures(); | |
98d7b594 | 887 | if (inmsg->hdr.flags.response_expected) |
12e364b9 KC |
888 | controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
889 | } | |
890 | ||
891 | static void | |
3ab47701 | 892 | controlvm_init_response(struct controlvm_message *msg, |
b3168c70 | 893 | struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 894 | { |
3ab47701 | 895 | memset(msg, 0, sizeof(struct controlvm_message)); |
b3168c70 | 896 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); |
98d7b594 BR |
897 | msg->hdr.payload_bytes = 0; |
898 | msg->hdr.payload_vm_offset = 0; | |
899 | msg->hdr.payload_max_bytes = 0; | |
12e364b9 | 900 | if (response < 0) { |
98d7b594 BR |
901 | msg->hdr.flags.failed = 1; |
902 | msg->hdr.completion_status = (u32) (-response); | |
12e364b9 KC |
903 | } |
904 | } | |
905 | ||
906 | static void | |
b3168c70 | 907 | controlvm_respond(struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 908 | { |
3ab47701 | 909 | struct controlvm_message outmsg; |
26eb2c0c | 910 | |
b3168c70 | 911 | controlvm_init_response(&outmsg, msg_hdr, response); |
12e364b9 KC |
912 | /* For DiagPool channel DEVICE_CHANGESTATE, we need to send |
913 | * back the deviceChangeState structure in the packet. */ | |
b3168c70 | 914 | if (msg_hdr->id == CONTROLVM_DEVICE_CHANGESTATE && |
0639ba67 BR |
915 | g_devicechangestate_packet.device_change_state.bus_no == |
916 | g_diagpool_bus_no && | |
917 | g_devicechangestate_packet.device_change_state.dev_no == | |
83d48905 | 918 | g_diagpool_dev_no) |
4f44b72d | 919 | outmsg.cmd = g_devicechangestate_packet; |
2098dbd1 | 920 | if (outmsg.hdr.flags.test_message == 1) |
12e364b9 | 921 | return; |
2098dbd1 | 922 | |
c3d9a224 | 923 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 924 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
925 | return; |
926 | } | |
927 | } | |
928 | ||
929 | static void | |
b3168c70 | 930 | controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, |
98d7b594 | 931 | int response, |
b9b141e8 | 932 | enum ultra_chipset_feature features) |
12e364b9 | 933 | { |
3ab47701 | 934 | struct controlvm_message outmsg; |
26eb2c0c | 935 | |
b3168c70 | 936 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b | 937 | outmsg.cmd.init_chipset.features = features; |
c3d9a224 | 938 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 939 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
940 | return; |
941 | } | |
942 | } | |
943 | ||
98d7b594 | 944 | static void controlvm_respond_physdev_changestate( |
b3168c70 | 945 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 946 | struct spar_segment_state state) |
12e364b9 | 947 | { |
3ab47701 | 948 | struct controlvm_message outmsg; |
26eb2c0c | 949 | |
b3168c70 | 950 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b BR |
951 | outmsg.cmd.device_change_state.state = state; |
952 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
c3d9a224 | 953 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 954 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
955 | return; |
956 | } | |
957 | } | |
958 | ||
2ee0deec PB |
959 | enum crash_obj_type { |
960 | CRASH_DEV, | |
961 | CRASH_BUS, | |
962 | }; | |
963 | ||
12e364b9 | 964 | static void |
3032aedd DZ |
965 | bus_responder(enum controlvm_id cmd_id, struct visorchipset_bus_info *p, |
966 | int response) | |
12e364b9 | 967 | { |
f4c11551 | 968 | bool need_clear = false; |
3032aedd | 969 | u32 bus_no = p->bus_no; |
12e364b9 | 970 | |
0aca7844 | 971 | if (!p) |
12e364b9 | 972 | return; |
0aca7844 | 973 | |
12e364b9 | 974 | if (response < 0) { |
fbb31f48 | 975 | if ((cmd_id == CONTROLVM_BUS_CREATE) && |
12e364b9 KC |
976 | (response != (-CONTROLVM_RESP_ERROR_ALREADY_DONE))) |
977 | /* undo the row we just created... */ | |
28723521 | 978 | busdevices_del(&dev_info_list, bus_no); |
12e364b9 | 979 | } else { |
fbb31f48 | 980 | if (cmd_id == CONTROLVM_BUS_CREATE) |
12e364b9 | 981 | p->state.created = 1; |
fbb31f48 | 982 | if (cmd_id == CONTROLVM_BUS_DESTROY) |
f4c11551 | 983 | need_clear = true; |
12e364b9 KC |
984 | } |
985 | ||
0aca7844 | 986 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 987 | return; /* no controlvm response needed */ |
6b59b31d | 988 | if (p->pending_msg_hdr.id != (u32)cmd_id) |
12e364b9 | 989 | return; |
33192fa1 BR |
990 | controlvm_respond(&p->pending_msg_hdr, response); |
991 | p->pending_msg_hdr.id = CONTROLVM_INVALID; | |
12e364b9 | 992 | if (need_clear) { |
9b989a98 | 993 | bus_info_clear(p); |
28723521 | 994 | busdevices_del(&dev_info_list, bus_no); |
12e364b9 KC |
995 | } |
996 | } | |
997 | ||
998 | static void | |
fbb31f48 | 999 | device_changestate_responder(enum controlvm_id cmd_id, |
b4b598fd | 1000 | struct visorchipset_device_info *p, int response, |
fbb31f48 | 1001 | struct spar_segment_state response_state) |
12e364b9 | 1002 | { |
3ab47701 | 1003 | struct controlvm_message outmsg; |
b4b598fd DZ |
1004 | u32 bus_no = p->bus_no; |
1005 | u32 dev_no = p->dev_no; | |
12e364b9 | 1006 | |
0aca7844 | 1007 | if (!p) |
12e364b9 | 1008 | return; |
0aca7844 | 1009 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 1010 | return; /* no controlvm response needed */ |
fbb31f48 | 1011 | if (p->pending_msg_hdr.id != cmd_id) |
12e364b9 | 1012 | return; |
12e364b9 | 1013 | |
246e0cd0 | 1014 | controlvm_init_response(&outmsg, &p->pending_msg_hdr, response); |
12e364b9 | 1015 | |
fbb31f48 BR |
1016 | outmsg.cmd.device_change_state.bus_no = bus_no; |
1017 | outmsg.cmd.device_change_state.dev_no = dev_no; | |
1018 | outmsg.cmd.device_change_state.state = response_state; | |
12e364b9 | 1019 | |
c3d9a224 | 1020 | if (!visorchannel_signalinsert(controlvm_channel, |
0aca7844 | 1021 | CONTROLVM_QUEUE_REQUEST, &outmsg)) |
12e364b9 | 1022 | return; |
12e364b9 | 1023 | |
246e0cd0 | 1024 | p->pending_msg_hdr.id = CONTROLVM_INVALID; |
12e364b9 KC |
1025 | } |
1026 | ||
1027 | static void | |
b4b598fd DZ |
1028 | device_responder(enum controlvm_id cmd_id, struct visorchipset_device_info *p, |
1029 | int response) | |
12e364b9 | 1030 | { |
f4c11551 | 1031 | bool need_clear = false; |
12e364b9 | 1032 | |
0aca7844 | 1033 | if (!p) |
12e364b9 | 1034 | return; |
12e364b9 | 1035 | if (response >= 0) { |
fbb31f48 | 1036 | if (cmd_id == CONTROLVM_DEVICE_CREATE) |
12e364b9 | 1037 | p->state.created = 1; |
fbb31f48 | 1038 | if (cmd_id == CONTROLVM_DEVICE_DESTROY) |
f4c11551 | 1039 | need_clear = true; |
12e364b9 KC |
1040 | } |
1041 | ||
0aca7844 | 1042 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 1043 | return; /* no controlvm response needed */ |
0aca7844 | 1044 | |
6b59b31d | 1045 | if (p->pending_msg_hdr.id != (u32)cmd_id) |
12e364b9 | 1046 | return; |
0aca7844 | 1047 | |
246e0cd0 BR |
1048 | controlvm_respond(&p->pending_msg_hdr, response); |
1049 | p->pending_msg_hdr.id = CONTROLVM_INVALID; | |
12e364b9 | 1050 | if (need_clear) |
9b989a98 | 1051 | dev_info_clear(p); |
12e364b9 KC |
1052 | } |
1053 | ||
1054 | static void | |
3032aedd | 1055 | bus_epilog(struct visorchipset_bus_info *bus_info, |
2836c6a8 | 1056 | u32 cmd, struct controlvm_message_header *msg_hdr, |
f4c11551 | 1057 | int response, bool need_response) |
12e364b9 | 1058 | { |
f4c11551 | 1059 | bool notified = false; |
12e364b9 | 1060 | |
2836c6a8 | 1061 | if (!bus_info) |
12e364b9 | 1062 | return; |
0aca7844 | 1063 | |
2836c6a8 BR |
1064 | if (need_response) { |
1065 | memcpy(&bus_info->pending_msg_hdr, msg_hdr, | |
98d7b594 | 1066 | sizeof(struct controlvm_message_header)); |
75c1f8b7 | 1067 | } else { |
2836c6a8 | 1068 | bus_info->pending_msg_hdr.id = CONTROLVM_INVALID; |
75c1f8b7 | 1069 | } |
12e364b9 | 1070 | |
8f1947ac | 1071 | down(¬ifier_lock); |
12e364b9 KC |
1072 | if (response == CONTROLVM_RESP_SUCCESS) { |
1073 | switch (cmd) { | |
1074 | case CONTROLVM_BUS_CREATE: | |
4da3336c | 1075 | if (busdev_notifiers.bus_create) { |
3032aedd | 1076 | (*busdev_notifiers.bus_create) (bus_info); |
f4c11551 | 1077 | notified = true; |
12e364b9 KC |
1078 | } |
1079 | break; | |
1080 | case CONTROLVM_BUS_DESTROY: | |
4da3336c | 1081 | if (busdev_notifiers.bus_destroy) { |
3032aedd | 1082 | (*busdev_notifiers.bus_destroy) (bus_info); |
f4c11551 | 1083 | notified = true; |
12e364b9 KC |
1084 | } |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | if (notified) | |
1089 | /* The callback function just called above is responsible | |
929aa8ae | 1090 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1091 | * function, which will call bus_responder() |
1092 | */ | |
1093 | ; | |
1094 | else | |
3032aedd | 1095 | bus_responder(cmd, bus_info, response); |
8f1947ac | 1096 | up(¬ifier_lock); |
12e364b9 KC |
1097 | } |
1098 | ||
1099 | static void | |
b4b598fd DZ |
1100 | device_epilog(struct visorchipset_device_info *dev_info, |
1101 | struct spar_segment_state state, u32 cmd, | |
2836c6a8 | 1102 | struct controlvm_message_header *msg_hdr, int response, |
f4c11551 | 1103 | bool need_response, bool for_visorbus) |
12e364b9 | 1104 | { |
e82ba62e | 1105 | struct visorchipset_busdev_notifiers *notifiers; |
f4c11551 | 1106 | bool notified = false; |
b4b598fd DZ |
1107 | u32 bus_no = dev_info->bus_no; |
1108 | u32 dev_no = dev_info->dev_no; | |
12e364b9 | 1109 | |
12e364b9 KC |
1110 | char *envp[] = { |
1111 | "SPARSP_DIAGPOOL_PAUSED_STATE = 1", | |
1112 | NULL | |
1113 | }; | |
1114 | ||
2836c6a8 | 1115 | if (!dev_info) |
12e364b9 | 1116 | return; |
0aca7844 | 1117 | |
4da3336c DK |
1118 | notifiers = &busdev_notifiers; |
1119 | ||
2836c6a8 BR |
1120 | if (need_response) { |
1121 | memcpy(&dev_info->pending_msg_hdr, msg_hdr, | |
98d7b594 | 1122 | sizeof(struct controlvm_message_header)); |
75c1f8b7 | 1123 | } else { |
2836c6a8 | 1124 | dev_info->pending_msg_hdr.id = CONTROLVM_INVALID; |
75c1f8b7 | 1125 | } |
12e364b9 | 1126 | |
8f1947ac | 1127 | down(¬ifier_lock); |
12e364b9 KC |
1128 | if (response >= 0) { |
1129 | switch (cmd) { | |
1130 | case CONTROLVM_DEVICE_CREATE: | |
1131 | if (notifiers->device_create) { | |
b4b598fd | 1132 | (*notifiers->device_create) (dev_info); |
f4c11551 | 1133 | notified = true; |
12e364b9 KC |
1134 | } |
1135 | break; | |
1136 | case CONTROLVM_DEVICE_CHANGESTATE: | |
1137 | /* ServerReady / ServerRunning / SegmentStateRunning */ | |
bd0d2dcc BR |
1138 | if (state.alive == segment_state_running.alive && |
1139 | state.operating == | |
1140 | segment_state_running.operating) { | |
12e364b9 | 1141 | if (notifiers->device_resume) { |
b4b598fd | 1142 | (*notifiers->device_resume) (dev_info); |
f4c11551 | 1143 | notified = true; |
12e364b9 KC |
1144 | } |
1145 | } | |
1146 | /* ServerNotReady / ServerLost / SegmentStateStandby */ | |
bd0d2dcc | 1147 | else if (state.alive == segment_state_standby.alive && |
3f833b54 | 1148 | state.operating == |
bd0d2dcc | 1149 | segment_state_standby.operating) { |
12e364b9 KC |
1150 | /* technically this is standby case |
1151 | * where server is lost | |
1152 | */ | |
1153 | if (notifiers->device_pause) { | |
b4b598fd | 1154 | (*notifiers->device_pause) (dev_info); |
f4c11551 | 1155 | notified = true; |
12e364b9 | 1156 | } |
bd0d2dcc | 1157 | } else if (state.alive == segment_state_paused.alive && |
3f833b54 | 1158 | state.operating == |
bd0d2dcc | 1159 | segment_state_paused.operating) { |
12e364b9 KC |
1160 | /* this is lite pause where channel is |
1161 | * still valid just 'pause' of it | |
1162 | */ | |
2836c6a8 BR |
1163 | if (bus_no == g_diagpool_bus_no && |
1164 | dev_no == g_diagpool_dev_no) { | |
12e364b9 KC |
1165 | /* this will trigger the |
1166 | * diag_shutdown.sh script in | |
1167 | * the visorchipset hotplug */ | |
1168 | kobject_uevent_env | |
eb34e877 | 1169 | (&visorchipset_platform_device.dev. |
12e364b9 KC |
1170 | kobj, KOBJ_ONLINE, envp); |
1171 | } | |
1172 | } | |
1173 | break; | |
1174 | case CONTROLVM_DEVICE_DESTROY: | |
1175 | if (notifiers->device_destroy) { | |
b4b598fd | 1176 | (*notifiers->device_destroy) (dev_info); |
f4c11551 | 1177 | notified = true; |
12e364b9 KC |
1178 | } |
1179 | break; | |
1180 | } | |
1181 | } | |
1182 | if (notified) | |
1183 | /* The callback function just called above is responsible | |
929aa8ae | 1184 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1185 | * function, which will call device_responder() |
1186 | */ | |
1187 | ; | |
1188 | else | |
b4b598fd | 1189 | device_responder(cmd, dev_info, response); |
8f1947ac | 1190 | up(¬ifier_lock); |
12e364b9 KC |
1191 | } |
1192 | ||
1193 | static void | |
3ab47701 | 1194 | bus_create(struct controlvm_message *inmsg) |
12e364b9 | 1195 | { |
2ea5117b | 1196 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1197 | u32 bus_no = cmd->create_bus.bus_no; |
12e364b9 | 1198 | int rc = CONTROLVM_RESP_SUCCESS; |
e82ba62e | 1199 | struct visorchipset_bus_info *bus_info; |
12e364b9 | 1200 | |
4f66520b | 1201 | bus_info = bus_find(&bus_info_list, bus_no); |
6c5fed35 BR |
1202 | if (bus_info && (bus_info->state.created == 1)) { |
1203 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1204 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1205 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
6c5fed35 | 1206 | goto cleanup; |
12e364b9 | 1207 | } |
6c5fed35 BR |
1208 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
1209 | if (!bus_info) { | |
1210 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1211 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1212 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
6c5fed35 | 1213 | goto cleanup; |
12e364b9 KC |
1214 | } |
1215 | ||
6c5fed35 BR |
1216 | INIT_LIST_HEAD(&bus_info->entry); |
1217 | bus_info->bus_no = bus_no; | |
12e364b9 | 1218 | |
6c5fed35 | 1219 | POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1220 | |
98d7b594 | 1221 | if (inmsg->hdr.flags.test_message == 1) |
6c5fed35 | 1222 | bus_info->chan_info.addr_type = ADDRTYPE_LOCALTEST; |
12e364b9 | 1223 | else |
6c5fed35 | 1224 | bus_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL; |
12e364b9 | 1225 | |
6c5fed35 BR |
1226 | bus_info->flags.server = inmsg->hdr.flags.server; |
1227 | bus_info->chan_info.channel_addr = cmd->create_bus.channel_addr; | |
1228 | bus_info->chan_info.n_channel_bytes = cmd->create_bus.channel_bytes; | |
1229 | bus_info->chan_info.channel_type_uuid = | |
9b1caee7 | 1230 | cmd->create_bus.bus_data_type_uuid; |
6c5fed35 | 1231 | bus_info->chan_info.channel_inst_uuid = cmd->create_bus.bus_inst_uuid; |
12e364b9 | 1232 | |
6c5fed35 | 1233 | list_add(&bus_info->entry, &bus_info_list); |
12e364b9 | 1234 | |
6c5fed35 | 1235 | POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1236 | |
6c5fed35 | 1237 | cleanup: |
3032aedd | 1238 | bus_epilog(bus_info, CONTROLVM_BUS_CREATE, &inmsg->hdr, |
98d7b594 | 1239 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1240 | } |
1241 | ||
1242 | static void | |
3ab47701 | 1243 | bus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1244 | { |
2ea5117b | 1245 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1246 | u32 bus_no = cmd->destroy_bus.bus_no; |
dff54cd6 | 1247 | struct visorchipset_bus_info *bus_info; |
12e364b9 KC |
1248 | int rc = CONTROLVM_RESP_SUCCESS; |
1249 | ||
4f66520b | 1250 | bus_info = bus_find(&bus_info_list, bus_no); |
dff54cd6 | 1251 | if (!bus_info) |
22ad57ba | 1252 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
dff54cd6 | 1253 | else if (bus_info->state.created == 0) |
22ad57ba | 1254 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1255 | |
3032aedd | 1256 | bus_epilog(bus_info, CONTROLVM_BUS_DESTROY, &inmsg->hdr, |
98d7b594 | 1257 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1258 | } |
1259 | ||
1260 | static void | |
317d9614 BR |
1261 | bus_configure(struct controlvm_message *inmsg, |
1262 | struct parser_context *parser_ctx) | |
12e364b9 | 1263 | { |
2ea5117b | 1264 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e JS |
1265 | u32 bus_no; |
1266 | struct visorchipset_bus_info *bus_info; | |
12e364b9 KC |
1267 | int rc = CONTROLVM_RESP_SUCCESS; |
1268 | char s[99]; | |
1269 | ||
654bada0 BR |
1270 | bus_no = cmd->configure_bus.bus_no; |
1271 | POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no, | |
1272 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1273 | |
4f66520b | 1274 | bus_info = bus_find(&bus_info_list, bus_no); |
654bada0 BR |
1275 | if (!bus_info) { |
1276 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1277 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1278 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1279 | } else if (bus_info->state.created == 0) { |
1280 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1281 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1282 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1283 | } else if (bus_info->pending_msg_hdr.id != CONTROLVM_INVALID) { |
1284 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1285 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1286 | rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; |
654bada0 BR |
1287 | } else { |
1288 | bus_info->partition_handle = cmd->configure_bus.guest_handle; | |
1289 | bus_info->partition_uuid = parser_id_get(parser_ctx); | |
1290 | parser_param_start(parser_ctx, PARSERSTRING_NAME); | |
1291 | bus_info->name = parser_string_get(parser_ctx); | |
1292 | ||
1293 | visorchannel_uuid_id(&bus_info->partition_uuid, s); | |
1294 | POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no, | |
1295 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1296 | } |
3032aedd | 1297 | bus_epilog(bus_info, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, |
98d7b594 | 1298 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1299 | } |
1300 | ||
1301 | static void | |
3ab47701 | 1302 | my_device_create(struct controlvm_message *inmsg) |
12e364b9 | 1303 | { |
2ea5117b | 1304 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1305 | u32 bus_no = cmd->create_device.bus_no; |
1306 | u32 dev_no = cmd->create_device.dev_no; | |
e82ba62e JS |
1307 | struct visorchipset_device_info *dev_info; |
1308 | struct visorchipset_bus_info *bus_info; | |
12e364b9 KC |
1309 | int rc = CONTROLVM_RESP_SUCCESS; |
1310 | ||
d480f6a2 | 1311 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
c60c8e26 BR |
1312 | if (dev_info && (dev_info->state.created == 1)) { |
1313 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1314 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1315 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
c60c8e26 | 1316 | goto cleanup; |
12e364b9 | 1317 | } |
4f66520b | 1318 | bus_info = bus_find(&bus_info_list, bus_no); |
c60c8e26 BR |
1319 | if (!bus_info) { |
1320 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1321 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1322 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1323 | goto cleanup; |
12e364b9 | 1324 | } |
c60c8e26 BR |
1325 | if (bus_info->state.created == 0) { |
1326 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1327 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1328 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1329 | goto cleanup; |
12e364b9 | 1330 | } |
c60c8e26 BR |
1331 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
1332 | if (!dev_info) { | |
1333 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1334 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1335 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
c60c8e26 | 1336 | goto cleanup; |
12e364b9 | 1337 | } |
97a84f12 | 1338 | |
c60c8e26 BR |
1339 | INIT_LIST_HEAD(&dev_info->entry); |
1340 | dev_info->bus_no = bus_no; | |
1341 | dev_info->dev_no = dev_no; | |
1342 | dev_info->dev_inst_uuid = cmd->create_device.dev_inst_uuid; | |
1343 | POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, | |
12e364b9 KC |
1344 | POSTCODE_SEVERITY_INFO); |
1345 | ||
98d7b594 | 1346 | if (inmsg->hdr.flags.test_message == 1) |
c60c8e26 | 1347 | dev_info->chan_info.addr_type = ADDRTYPE_LOCALTEST; |
12e364b9 | 1348 | else |
c60c8e26 BR |
1349 | dev_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL; |
1350 | dev_info->chan_info.channel_addr = cmd->create_device.channel_addr; | |
1351 | dev_info->chan_info.n_channel_bytes = cmd->create_device.channel_bytes; | |
1352 | dev_info->chan_info.channel_type_uuid = | |
9b1caee7 | 1353 | cmd->create_device.data_type_uuid; |
c60c8e26 BR |
1354 | list_add(&dev_info->entry, &dev_info_list); |
1355 | POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no, | |
12e364b9 | 1356 | POSTCODE_SEVERITY_INFO); |
c60c8e26 | 1357 | cleanup: |
12e364b9 | 1358 | /* get the bus and devNo for DiagPool channel */ |
c60c8e26 BR |
1359 | if (dev_info && |
1360 | is_diagpool_channel(dev_info->chan_info.channel_type_uuid)) { | |
1361 | g_diagpool_bus_no = bus_no; | |
1362 | g_diagpool_dev_no = dev_no; | |
12e364b9 | 1363 | } |
b4b598fd | 1364 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1365 | CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, |
4da3336c | 1366 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1367 | } |
1368 | ||
1369 | static void | |
3ab47701 | 1370 | my_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 1371 | { |
2ea5117b | 1372 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1373 | u32 bus_no = cmd->device_change_state.bus_no; |
1374 | u32 dev_no = cmd->device_change_state.dev_no; | |
2ea5117b | 1375 | struct spar_segment_state state = cmd->device_change_state.state; |
e82ba62e | 1376 | struct visorchipset_device_info *dev_info; |
12e364b9 KC |
1377 | int rc = CONTROLVM_RESP_SUCCESS; |
1378 | ||
d480f6a2 | 1379 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
0278a905 BR |
1380 | if (!dev_info) { |
1381 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1382 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1383 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
0278a905 BR |
1384 | } else if (dev_info->state.created == 0) { |
1385 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1386 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1387 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
12e364b9 | 1388 | } |
0278a905 | 1389 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1390 | device_epilog(dev_info, state, |
0278a905 | 1391 | CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, |
4da3336c | 1392 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1393 | } |
1394 | ||
1395 | static void | |
3ab47701 | 1396 | my_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1397 | { |
2ea5117b | 1398 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1399 | u32 bus_no = cmd->destroy_device.bus_no; |
1400 | u32 dev_no = cmd->destroy_device.dev_no; | |
e82ba62e | 1401 | struct visorchipset_device_info *dev_info; |
12e364b9 KC |
1402 | int rc = CONTROLVM_RESP_SUCCESS; |
1403 | ||
d480f6a2 | 1404 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
61715c8b | 1405 | if (!dev_info) |
22ad57ba | 1406 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
61715c8b | 1407 | else if (dev_info->state.created == 0) |
22ad57ba | 1408 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1409 | |
61715c8b | 1410 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
b4b598fd | 1411 | device_epilog(dev_info, segment_state_running, |
12e364b9 | 1412 | CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, |
4da3336c | 1413 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1414 | } |
1415 | ||
1416 | /* When provided with the physical address of the controlvm channel | |
1417 | * (phys_addr), the offset to the payload area we need to manage | |
1418 | * (offset), and the size of this payload area (bytes), fills in the | |
f4c11551 | 1419 | * controlvm_payload_info struct. Returns true for success or false |
12e364b9 KC |
1420 | * for failure. |
1421 | */ | |
1422 | static int | |
d5b3f1dc | 1423 | initialize_controlvm_payload_info(u64 phys_addr, u64 offset, u32 bytes, |
c1f834eb | 1424 | struct visor_controlvm_payload_info *info) |
12e364b9 | 1425 | { |
c242233e | 1426 | u8 __iomem *payload = NULL; |
12e364b9 KC |
1427 | int rc = CONTROLVM_RESP_SUCCESS; |
1428 | ||
38f736e9 | 1429 | if (!info) { |
22ad57ba | 1430 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1431 | goto cleanup; |
12e364b9 | 1432 | } |
c1f834eb | 1433 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 | 1434 | if ((offset == 0) || (bytes == 0)) { |
22ad57ba | 1435 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1436 | goto cleanup; |
12e364b9 KC |
1437 | } |
1438 | payload = ioremap_cache(phys_addr + offset, bytes); | |
38f736e9 | 1439 | if (!payload) { |
22ad57ba | 1440 | rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; |
f118a39b | 1441 | goto cleanup; |
12e364b9 KC |
1442 | } |
1443 | ||
1444 | info->offset = offset; | |
1445 | info->bytes = bytes; | |
1446 | info->ptr = payload; | |
12e364b9 | 1447 | |
f118a39b | 1448 | cleanup: |
12e364b9 | 1449 | if (rc < 0) { |
f118a39b | 1450 | if (payload) { |
12e364b9 KC |
1451 | iounmap(payload); |
1452 | payload = NULL; | |
1453 | } | |
1454 | } | |
1455 | return rc; | |
1456 | } | |
1457 | ||
1458 | static void | |
c1f834eb | 1459 | destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info) |
12e364b9 | 1460 | { |
597c338f | 1461 | if (info->ptr) { |
12e364b9 KC |
1462 | iounmap(info->ptr); |
1463 | info->ptr = NULL; | |
1464 | } | |
c1f834eb | 1465 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 KC |
1466 | } |
1467 | ||
1468 | static void | |
1469 | initialize_controlvm_payload(void) | |
1470 | { | |
d5b3f1dc | 1471 | u64 phys_addr = visorchannel_get_physaddr(controlvm_channel); |
cafefc0c BR |
1472 | u64 payload_offset = 0; |
1473 | u32 payload_bytes = 0; | |
26eb2c0c | 1474 | |
c3d9a224 | 1475 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1476 | offsetof(struct spar_controlvm_channel_protocol, |
1477 | request_payload_offset), | |
cafefc0c | 1478 | &payload_offset, sizeof(payload_offset)) < 0) { |
12e364b9 KC |
1479 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1480 | POSTCODE_SEVERITY_ERR); | |
1481 | return; | |
1482 | } | |
c3d9a224 | 1483 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1484 | offsetof(struct spar_controlvm_channel_protocol, |
1485 | request_payload_bytes), | |
cafefc0c | 1486 | &payload_bytes, sizeof(payload_bytes)) < 0) { |
12e364b9 KC |
1487 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1488 | POSTCODE_SEVERITY_ERR); | |
1489 | return; | |
1490 | } | |
1491 | initialize_controlvm_payload_info(phys_addr, | |
cafefc0c | 1492 | payload_offset, payload_bytes, |
84982fbf | 1493 | &controlvm_payload_info); |
12e364b9 KC |
1494 | } |
1495 | ||
1496 | /* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1497 | * Returns CONTROLVM_RESP_xxx code. | |
1498 | */ | |
d3368a58 | 1499 | static int |
12e364b9 KC |
1500 | visorchipset_chipset_ready(void) |
1501 | { | |
eb34e877 | 1502 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); |
12e364b9 KC |
1503 | return CONTROLVM_RESP_SUCCESS; |
1504 | } | |
12e364b9 | 1505 | |
d3368a58 | 1506 | static int |
12e364b9 KC |
1507 | visorchipset_chipset_selftest(void) |
1508 | { | |
1509 | char env_selftest[20]; | |
1510 | char *envp[] = { env_selftest, NULL }; | |
26eb2c0c | 1511 | |
12e364b9 | 1512 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); |
eb34e877 | 1513 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1514 | envp); |
1515 | return CONTROLVM_RESP_SUCCESS; | |
1516 | } | |
12e364b9 KC |
1517 | |
1518 | /* Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1519 | * Returns CONTROLVM_RESP_xxx code. | |
1520 | */ | |
d3368a58 | 1521 | static int |
12e364b9 KC |
1522 | visorchipset_chipset_notready(void) |
1523 | { | |
eb34e877 | 1524 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); |
12e364b9 KC |
1525 | return CONTROLVM_RESP_SUCCESS; |
1526 | } | |
12e364b9 KC |
1527 | |
1528 | static void | |
77a0449d | 1529 | chipset_ready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1530 | { |
1531 | int rc = visorchipset_chipset_ready(); | |
26eb2c0c | 1532 | |
12e364b9 KC |
1533 | if (rc != CONTROLVM_RESP_SUCCESS) |
1534 | rc = -rc; | |
77a0449d BR |
1535 | if (msg_hdr->flags.response_expected && !visorchipset_holdchipsetready) |
1536 | controlvm_respond(msg_hdr, rc); | |
1537 | if (msg_hdr->flags.response_expected && visorchipset_holdchipsetready) { | |
12e364b9 KC |
1538 | /* Send CHIPSET_READY response when all modules have been loaded |
1539 | * and disks mounted for the partition | |
1540 | */ | |
77a0449d | 1541 | g_chipset_msg_hdr = *msg_hdr; |
12e364b9 KC |
1542 | } |
1543 | } | |
1544 | ||
1545 | static void | |
77a0449d | 1546 | chipset_selftest(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1547 | { |
1548 | int rc = visorchipset_chipset_selftest(); | |
26eb2c0c | 1549 | |
12e364b9 KC |
1550 | if (rc != CONTROLVM_RESP_SUCCESS) |
1551 | rc = -rc; | |
77a0449d BR |
1552 | if (msg_hdr->flags.response_expected) |
1553 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1554 | } |
1555 | ||
1556 | static void | |
77a0449d | 1557 | chipset_notready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1558 | { |
1559 | int rc = visorchipset_chipset_notready(); | |
26eb2c0c | 1560 | |
12e364b9 KC |
1561 | if (rc != CONTROLVM_RESP_SUCCESS) |
1562 | rc = -rc; | |
77a0449d BR |
1563 | if (msg_hdr->flags.response_expected) |
1564 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1565 | } |
1566 | ||
1567 | /* This is your "one-stop" shop for grabbing the next message from the | |
1568 | * CONTROLVM_QUEUE_EVENT queue in the controlvm channel. | |
1569 | */ | |
f4c11551 | 1570 | static bool |
3ab47701 | 1571 | read_controlvm_event(struct controlvm_message *msg) |
12e364b9 | 1572 | { |
c3d9a224 | 1573 | if (visorchannel_signalremove(controlvm_channel, |
12e364b9 KC |
1574 | CONTROLVM_QUEUE_EVENT, msg)) { |
1575 | /* got a message */ | |
0aca7844 | 1576 | if (msg->hdr.flags.test_message == 1) |
f4c11551 JS |
1577 | return false; |
1578 | return true; | |
12e364b9 | 1579 | } |
f4c11551 | 1580 | return false; |
12e364b9 KC |
1581 | } |
1582 | ||
1583 | /* | |
1584 | * The general parahotplug flow works as follows. The visorchipset | |
1585 | * driver receives a DEVICE_CHANGESTATE message from Command | |
1586 | * specifying a physical device to enable or disable. The CONTROLVM | |
1587 | * message handler calls parahotplug_process_message, which then adds | |
1588 | * the message to a global list and kicks off a udev event which | |
1589 | * causes a user level script to enable or disable the specified | |
1590 | * device. The udev script then writes to | |
1591 | * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write | |
1592 | * to get called, at which point the appropriate CONTROLVM message is | |
1593 | * retrieved from the list and responded to. | |
1594 | */ | |
1595 | ||
1596 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
1597 | ||
1598 | /* | |
1599 | * Generate unique int to match an outstanding CONTROLVM message with a | |
1600 | * udev script /proc response | |
1601 | */ | |
1602 | static int | |
1603 | parahotplug_next_id(void) | |
1604 | { | |
1605 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 1606 | |
12e364b9 KC |
1607 | return atomic_inc_return(&id); |
1608 | } | |
1609 | ||
1610 | /* | |
1611 | * Returns the time (in jiffies) when a CONTROLVM message on the list | |
1612 | * should expire -- PARAHOTPLUG_TIMEOUT_MS in the future | |
1613 | */ | |
1614 | static unsigned long | |
1615 | parahotplug_next_expiration(void) | |
1616 | { | |
2cc1a1b3 | 1617 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
1618 | } |
1619 | ||
1620 | /* | |
1621 | * Create a parahotplug_request, which is basically a wrapper for a | |
1622 | * CONTROLVM_MESSAGE that we can stick on a list | |
1623 | */ | |
1624 | static struct parahotplug_request * | |
3ab47701 | 1625 | parahotplug_request_create(struct controlvm_message *msg) |
12e364b9 | 1626 | { |
ea0dcfcf QL |
1627 | struct parahotplug_request *req; |
1628 | ||
6a55e3c3 | 1629 | req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY); |
38f736e9 | 1630 | if (!req) |
12e364b9 KC |
1631 | return NULL; |
1632 | ||
1633 | req->id = parahotplug_next_id(); | |
1634 | req->expiration = parahotplug_next_expiration(); | |
1635 | req->msg = *msg; | |
1636 | ||
1637 | return req; | |
1638 | } | |
1639 | ||
1640 | /* | |
1641 | * Free a parahotplug_request. | |
1642 | */ | |
1643 | static void | |
1644 | parahotplug_request_destroy(struct parahotplug_request *req) | |
1645 | { | |
1646 | kfree(req); | |
1647 | } | |
1648 | ||
1649 | /* | |
1650 | * Cause uevent to run the user level script to do the disable/enable | |
1651 | * specified in (the CONTROLVM message in) the specified | |
1652 | * parahotplug_request | |
1653 | */ | |
1654 | static void | |
1655 | parahotplug_request_kickoff(struct parahotplug_request *req) | |
1656 | { | |
2ea5117b | 1657 | struct controlvm_message_packet *cmd = &req->msg.cmd; |
12e364b9 KC |
1658 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], |
1659 | env_func[40]; | |
1660 | char *envp[] = { | |
1661 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1662 | }; | |
1663 | ||
1664 | sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); | |
1665 | sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); | |
1666 | sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", | |
2ea5117b | 1667 | cmd->device_change_state.state.active); |
12e364b9 | 1668 | sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", |
2ea5117b | 1669 | cmd->device_change_state.bus_no); |
12e364b9 | 1670 | sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", |
2ea5117b | 1671 | cmd->device_change_state.dev_no >> 3); |
12e364b9 | 1672 | sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", |
2ea5117b | 1673 | cmd->device_change_state.dev_no & 0x7); |
12e364b9 | 1674 | |
eb34e877 | 1675 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1676 | envp); |
1677 | } | |
1678 | ||
1679 | /* | |
1680 | * Remove any request from the list that's been on there too long and | |
1681 | * respond with an error. | |
1682 | */ | |
1683 | static void | |
1684 | parahotplug_process_list(void) | |
1685 | { | |
e82ba62e JS |
1686 | struct list_head *pos; |
1687 | struct list_head *tmp; | |
12e364b9 | 1688 | |
ddf5de53 | 1689 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 | 1690 | |
ddf5de53 | 1691 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1692 | struct parahotplug_request *req = |
1693 | list_entry(pos, struct parahotplug_request, list); | |
55b33413 BR |
1694 | |
1695 | if (!time_after_eq(jiffies, req->expiration)) | |
1696 | continue; | |
1697 | ||
1698 | list_del(pos); | |
1699 | if (req->msg.hdr.flags.response_expected) | |
1700 | controlvm_respond_physdev_changestate( | |
1701 | &req->msg.hdr, | |
1702 | CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, | |
1703 | req->msg.cmd.device_change_state.state); | |
1704 | parahotplug_request_destroy(req); | |
12e364b9 KC |
1705 | } |
1706 | ||
ddf5de53 | 1707 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1708 | } |
1709 | ||
1710 | /* | |
1711 | * Called from the /proc handler, which means the user script has | |
1712 | * finished the enable/disable. Find the matching identifier, and | |
1713 | * respond to the CONTROLVM message with success. | |
1714 | */ | |
1715 | static int | |
b06bdf7d | 1716 | parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1717 | { |
e82ba62e JS |
1718 | struct list_head *pos; |
1719 | struct list_head *tmp; | |
12e364b9 | 1720 | |
ddf5de53 | 1721 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1722 | |
1723 | /* Look for a request matching "id". */ | |
ddf5de53 | 1724 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1725 | struct parahotplug_request *req = |
1726 | list_entry(pos, struct parahotplug_request, list); | |
1727 | if (req->id == id) { | |
1728 | /* Found a match. Remove it from the list and | |
1729 | * respond. | |
1730 | */ | |
1731 | list_del(pos); | |
ddf5de53 | 1732 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1733 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1734 | if (req->msg.hdr.flags.response_expected) |
12e364b9 KC |
1735 | controlvm_respond_physdev_changestate( |
1736 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
2ea5117b | 1737 | req->msg.cmd.device_change_state.state); |
12e364b9 KC |
1738 | parahotplug_request_destroy(req); |
1739 | return 0; | |
1740 | } | |
1741 | } | |
1742 | ||
ddf5de53 | 1743 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1744 | return -1; |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | * Enables or disables a PCI device by kicking off a udev script | |
1749 | */ | |
bd5b9b32 | 1750 | static void |
3ab47701 | 1751 | parahotplug_process_message(struct controlvm_message *inmsg) |
12e364b9 KC |
1752 | { |
1753 | struct parahotplug_request *req; | |
1754 | ||
1755 | req = parahotplug_request_create(inmsg); | |
1756 | ||
38f736e9 | 1757 | if (!req) |
12e364b9 | 1758 | return; |
12e364b9 | 1759 | |
2ea5117b | 1760 | if (inmsg->cmd.device_change_state.state.active) { |
12e364b9 KC |
1761 | /* For enable messages, just respond with success |
1762 | * right away. This is a bit of a hack, but there are | |
1763 | * issues with the early enable messages we get (with | |
1764 | * either the udev script not detecting that the device | |
1765 | * is up, or not getting called at all). Fortunately | |
1766 | * the messages that get lost don't matter anyway, as | |
1767 | * devices are automatically enabled at | |
1768 | * initialization. | |
1769 | */ | |
1770 | parahotplug_request_kickoff(req); | |
1771 | controlvm_respond_physdev_changestate(&inmsg->hdr, | |
8e76e695 BR |
1772 | CONTROLVM_RESP_SUCCESS, |
1773 | inmsg->cmd.device_change_state.state); | |
12e364b9 KC |
1774 | parahotplug_request_destroy(req); |
1775 | } else { | |
1776 | /* For disable messages, add the request to the | |
1777 | * request list before kicking off the udev script. It | |
1778 | * won't get responded to until the script has | |
1779 | * indicated it's done. | |
1780 | */ | |
ddf5de53 BR |
1781 | spin_lock(¶hotplug_request_list_lock); |
1782 | list_add_tail(&req->list, ¶hotplug_request_list); | |
1783 | spin_unlock(¶hotplug_request_list_lock); | |
12e364b9 KC |
1784 | |
1785 | parahotplug_request_kickoff(req); | |
1786 | } | |
1787 | } | |
1788 | ||
12e364b9 KC |
1789 | /* Process a controlvm message. |
1790 | * Return result: | |
779d0752 | 1791 | * false - this function will return false only in the case where the |
12e364b9 KC |
1792 | * controlvm message was NOT processed, but processing must be |
1793 | * retried before reading the next controlvm message; a | |
1794 | * scenario where this can occur is when we need to throttle | |
1795 | * the allocation of memory in which to copy out controlvm | |
1796 | * payload data | |
f4c11551 | 1797 | * true - processing of the controlvm message completed, |
12e364b9 KC |
1798 | * either successfully or with an error. |
1799 | */ | |
f4c11551 | 1800 | static bool |
d5b3f1dc | 1801 | handle_command(struct controlvm_message inmsg, u64 channel_addr) |
12e364b9 | 1802 | { |
2ea5117b | 1803 | struct controlvm_message_packet *cmd = &inmsg.cmd; |
e82ba62e JS |
1804 | u64 parm_addr; |
1805 | u32 parm_bytes; | |
317d9614 | 1806 | struct parser_context *parser_ctx = NULL; |
e82ba62e | 1807 | bool local_addr; |
3ab47701 | 1808 | struct controlvm_message ackmsg; |
12e364b9 KC |
1809 | |
1810 | /* create parsing context if necessary */ | |
818352a8 | 1811 | local_addr = (inmsg.hdr.flags.test_message == 1); |
0aca7844 | 1812 | if (channel_addr == 0) |
f4c11551 | 1813 | return true; |
818352a8 BR |
1814 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; |
1815 | parm_bytes = inmsg.hdr.payload_bytes; | |
12e364b9 KC |
1816 | |
1817 | /* Parameter and channel addresses within test messages actually lie | |
1818 | * within our OS-controlled memory. We need to know that, because it | |
1819 | * makes a difference in how we compute the virtual address. | |
1820 | */ | |
ebec8967 | 1821 | if (parm_addr && parm_bytes) { |
f4c11551 | 1822 | bool retry = false; |
26eb2c0c | 1823 | |
12e364b9 | 1824 | parser_ctx = |
818352a8 BR |
1825 | parser_init_byte_stream(parm_addr, parm_bytes, |
1826 | local_addr, &retry); | |
1b08872e | 1827 | if (!parser_ctx && retry) |
f4c11551 | 1828 | return false; |
12e364b9 KC |
1829 | } |
1830 | ||
818352a8 | 1831 | if (!local_addr) { |
12e364b9 KC |
1832 | controlvm_init_response(&ackmsg, &inmsg.hdr, |
1833 | CONTROLVM_RESP_SUCCESS); | |
c3d9a224 BR |
1834 | if (controlvm_channel) |
1835 | visorchannel_signalinsert(controlvm_channel, | |
1b08872e BR |
1836 | CONTROLVM_QUEUE_ACK, |
1837 | &ackmsg); | |
12e364b9 | 1838 | } |
98d7b594 | 1839 | switch (inmsg.hdr.id) { |
12e364b9 | 1840 | case CONTROLVM_CHIPSET_INIT: |
12e364b9 KC |
1841 | chipset_init(&inmsg); |
1842 | break; | |
1843 | case CONTROLVM_BUS_CREATE: | |
12e364b9 KC |
1844 | bus_create(&inmsg); |
1845 | break; | |
1846 | case CONTROLVM_BUS_DESTROY: | |
12e364b9 KC |
1847 | bus_destroy(&inmsg); |
1848 | break; | |
1849 | case CONTROLVM_BUS_CONFIGURE: | |
12e364b9 KC |
1850 | bus_configure(&inmsg, parser_ctx); |
1851 | break; | |
1852 | case CONTROLVM_DEVICE_CREATE: | |
12e364b9 KC |
1853 | my_device_create(&inmsg); |
1854 | break; | |
1855 | case CONTROLVM_DEVICE_CHANGESTATE: | |
2ea5117b | 1856 | if (cmd->device_change_state.flags.phys_device) { |
12e364b9 KC |
1857 | parahotplug_process_message(&inmsg); |
1858 | } else { | |
12e364b9 KC |
1859 | /* save the hdr and cmd structures for later use */ |
1860 | /* when sending back the response to Command */ | |
1861 | my_device_changestate(&inmsg); | |
4f44b72d | 1862 | g_devicechangestate_packet = inmsg.cmd; |
12e364b9 KC |
1863 | break; |
1864 | } | |
1865 | break; | |
1866 | case CONTROLVM_DEVICE_DESTROY: | |
12e364b9 KC |
1867 | my_device_destroy(&inmsg); |
1868 | break; | |
1869 | case CONTROLVM_DEVICE_CONFIGURE: | |
12e364b9 | 1870 | /* no op for now, just send a respond that we passed */ |
98d7b594 | 1871 | if (inmsg.hdr.flags.response_expected) |
12e364b9 KC |
1872 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); |
1873 | break; | |
1874 | case CONTROLVM_CHIPSET_READY: | |
12e364b9 KC |
1875 | chipset_ready(&inmsg.hdr); |
1876 | break; | |
1877 | case CONTROLVM_CHIPSET_SELFTEST: | |
12e364b9 KC |
1878 | chipset_selftest(&inmsg.hdr); |
1879 | break; | |
1880 | case CONTROLVM_CHIPSET_STOP: | |
12e364b9 KC |
1881 | chipset_notready(&inmsg.hdr); |
1882 | break; | |
1883 | default: | |
98d7b594 | 1884 | if (inmsg.hdr.flags.response_expected) |
12e364b9 | 1885 | controlvm_respond(&inmsg.hdr, |
818352a8 | 1886 | -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); |
12e364b9 KC |
1887 | break; |
1888 | } | |
1889 | ||
38f736e9 | 1890 | if (parser_ctx) { |
12e364b9 KC |
1891 | parser_done(parser_ctx); |
1892 | parser_ctx = NULL; | |
1893 | } | |
f4c11551 | 1894 | return true; |
12e364b9 KC |
1895 | } |
1896 | ||
5f3a7e36 DK |
1897 | static inline unsigned int |
1898 | issue_vmcall_io_controlvm_addr(u64 *control_addr, u32 *control_bytes) | |
1899 | { | |
1900 | struct vmcall_io_controlvm_addr_params params; | |
1901 | int result = VMCALL_SUCCESS; | |
1902 | u64 physaddr; | |
1903 | ||
1904 | physaddr = virt_to_phys(¶ms); | |
1905 | ISSUE_IO_VMCALL(VMCALL_IO_CONTROLVM_ADDR, physaddr, result); | |
1906 | if (VMCALL_SUCCESSFUL(result)) { | |
1907 | *control_addr = params.address; | |
1908 | *control_bytes = params.channel_bytes; | |
1909 | } | |
1910 | return result; | |
1911 | } | |
1912 | ||
d5b3f1dc | 1913 | static u64 controlvm_get_channel_address(void) |
524b0b63 | 1914 | { |
5fc0229a | 1915 | u64 addr = 0; |
b3c55b13 | 1916 | u32 size = 0; |
524b0b63 | 1917 | |
0aca7844 | 1918 | if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) |
524b0b63 | 1919 | return 0; |
0aca7844 | 1920 | |
524b0b63 BR |
1921 | return addr; |
1922 | } | |
1923 | ||
12e364b9 KC |
1924 | static void |
1925 | controlvm_periodic_work(struct work_struct *work) | |
1926 | { | |
3ab47701 | 1927 | struct controlvm_message inmsg; |
f4c11551 JS |
1928 | bool got_command = false; |
1929 | bool handle_command_failed = false; | |
1c1ed292 | 1930 | static u64 poll_count; |
12e364b9 KC |
1931 | |
1932 | /* make sure visorbus server is registered for controlvm callbacks */ | |
4da3336c | 1933 | if (visorchipset_visorbusregwait && !visorbusregistered) |
1c1ed292 | 1934 | goto cleanup; |
12e364b9 | 1935 | |
1c1ed292 BR |
1936 | poll_count++; |
1937 | if (poll_count >= 250) | |
12e364b9 KC |
1938 | ; /* keep going */ |
1939 | else | |
1c1ed292 | 1940 | goto cleanup; |
12e364b9 KC |
1941 | |
1942 | /* Check events to determine if response to CHIPSET_READY | |
1943 | * should be sent | |
1944 | */ | |
0639ba67 BR |
1945 | if (visorchipset_holdchipsetready && |
1946 | (g_chipset_msg_hdr.id != CONTROLVM_INVALID)) { | |
12e364b9 | 1947 | if (check_chipset_events() == 1) { |
da021f02 | 1948 | controlvm_respond(&g_chipset_msg_hdr, 0); |
12e364b9 | 1949 | clear_chipset_events(); |
da021f02 | 1950 | memset(&g_chipset_msg_hdr, 0, |
98d7b594 | 1951 | sizeof(struct controlvm_message_header)); |
12e364b9 KC |
1952 | } |
1953 | } | |
1954 | ||
c3d9a224 | 1955 | while (visorchannel_signalremove(controlvm_channel, |
8a1182eb | 1956 | CONTROLVM_QUEUE_RESPONSE, |
c3d9a224 BR |
1957 | &inmsg)) |
1958 | ; | |
1c1ed292 | 1959 | if (!got_command) { |
7166ed19 | 1960 | if (controlvm_pending_msg_valid) { |
8a1182eb BR |
1961 | /* we throttled processing of a prior |
1962 | * msg, so try to process it again | |
1963 | * rather than reading a new one | |
1964 | */ | |
7166ed19 | 1965 | inmsg = controlvm_pending_msg; |
f4c11551 | 1966 | controlvm_pending_msg_valid = false; |
1c1ed292 | 1967 | got_command = true; |
75c1f8b7 | 1968 | } else { |
1c1ed292 | 1969 | got_command = read_controlvm_event(&inmsg); |
75c1f8b7 | 1970 | } |
8a1182eb | 1971 | } |
12e364b9 | 1972 | |
f4c11551 | 1973 | handle_command_failed = false; |
1c1ed292 | 1974 | while (got_command && (!handle_command_failed)) { |
b53e0e93 | 1975 | most_recent_message_jiffies = jiffies; |
8a1182eb BR |
1976 | if (handle_command(inmsg, |
1977 | visorchannel_get_physaddr | |
c3d9a224 | 1978 | (controlvm_channel))) |
1c1ed292 | 1979 | got_command = read_controlvm_event(&inmsg); |
8a1182eb BR |
1980 | else { |
1981 | /* this is a scenario where throttling | |
1982 | * is required, but probably NOT an | |
1983 | * error...; we stash the current | |
1984 | * controlvm msg so we will attempt to | |
1985 | * reprocess it on our next loop | |
1986 | */ | |
f4c11551 | 1987 | handle_command_failed = true; |
7166ed19 | 1988 | controlvm_pending_msg = inmsg; |
f4c11551 | 1989 | controlvm_pending_msg_valid = true; |
12e364b9 KC |
1990 | } |
1991 | } | |
1992 | ||
1993 | /* parahotplug_worker */ | |
1994 | parahotplug_process_list(); | |
1995 | ||
1c1ed292 | 1996 | cleanup: |
12e364b9 KC |
1997 | |
1998 | if (time_after(jiffies, | |
b53e0e93 | 1999 | most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { |
12e364b9 KC |
2000 | /* it's been longer than MIN_IDLE_SECONDS since we |
2001 | * processed our last controlvm message; slow down the | |
2002 | * polling | |
2003 | */ | |
911e213e BR |
2004 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) |
2005 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
12e364b9 | 2006 | } else { |
911e213e BR |
2007 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) |
2008 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
12e364b9 KC |
2009 | } |
2010 | ||
9232d2d6 BR |
2011 | queue_delayed_work(periodic_controlvm_workqueue, |
2012 | &periodic_controlvm_work, poll_jiffies); | |
12e364b9 KC |
2013 | } |
2014 | ||
2015 | static void | |
2016 | setup_crash_devices_work_queue(struct work_struct *work) | |
2017 | { | |
e6bdb904 BR |
2018 | struct controlvm_message local_crash_bus_msg; |
2019 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 2020 | struct controlvm_message msg; |
e6bdb904 BR |
2021 | u32 local_crash_msg_offset; |
2022 | u16 local_crash_msg_count; | |
12e364b9 | 2023 | |
4da3336c DK |
2024 | /* make sure visorbus is registered for controlvm callbacks */ |
2025 | if (visorchipset_visorbusregwait && !visorbusregistered) | |
e6bdb904 | 2026 | goto cleanup; |
12e364b9 KC |
2027 | |
2028 | POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
2029 | ||
2030 | /* send init chipset msg */ | |
98d7b594 | 2031 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
2032 | msg.cmd.init_chipset.bus_count = 23; |
2033 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
2034 | |
2035 | chipset_init(&msg); | |
2036 | ||
12e364b9 | 2037 | /* get saved message count */ |
c3d9a224 | 2038 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
2039 | offsetof(struct spar_controlvm_channel_protocol, |
2040 | saved_crash_message_count), | |
e6bdb904 | 2041 | &local_crash_msg_count, sizeof(u16)) < 0) { |
12e364b9 KC |
2042 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
2043 | POSTCODE_SEVERITY_ERR); | |
2044 | return; | |
2045 | } | |
2046 | ||
e6bdb904 | 2047 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
12e364b9 | 2048 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
e6bdb904 | 2049 | local_crash_msg_count, |
12e364b9 KC |
2050 | POSTCODE_SEVERITY_ERR); |
2051 | return; | |
2052 | } | |
2053 | ||
2054 | /* get saved crash message offset */ | |
c3d9a224 | 2055 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
2056 | offsetof(struct spar_controlvm_channel_protocol, |
2057 | saved_crash_message_offset), | |
e6bdb904 | 2058 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
12e364b9 KC |
2059 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
2060 | POSTCODE_SEVERITY_ERR); | |
2061 | return; | |
2062 | } | |
2063 | ||
2064 | /* read create device message for storage bus offset */ | |
c3d9a224 | 2065 | if (visorchannel_read(controlvm_channel, |
e6bdb904 BR |
2066 | local_crash_msg_offset, |
2067 | &local_crash_bus_msg, | |
3ab47701 | 2068 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
2069 | POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, |
2070 | POSTCODE_SEVERITY_ERR); | |
2071 | return; | |
2072 | } | |
2073 | ||
2074 | /* read create device message for storage device */ | |
c3d9a224 | 2075 | if (visorchannel_read(controlvm_channel, |
e6bdb904 | 2076 | local_crash_msg_offset + |
3ab47701 | 2077 | sizeof(struct controlvm_message), |
e6bdb904 | 2078 | &local_crash_dev_msg, |
3ab47701 | 2079 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
2080 | POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, |
2081 | POSTCODE_SEVERITY_ERR); | |
2082 | return; | |
2083 | } | |
2084 | ||
2085 | /* reuse IOVM create bus message */ | |
ebec8967 | 2086 | if (local_crash_bus_msg.cmd.create_bus.channel_addr) { |
e6bdb904 | 2087 | bus_create(&local_crash_bus_msg); |
75c1f8b7 | 2088 | } else { |
12e364b9 KC |
2089 | POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, |
2090 | POSTCODE_SEVERITY_ERR); | |
2091 | return; | |
2092 | } | |
2093 | ||
2094 | /* reuse create device message for storage device */ | |
ebec8967 | 2095 | if (local_crash_dev_msg.cmd.create_device.channel_addr) { |
e6bdb904 | 2096 | my_device_create(&local_crash_dev_msg); |
75c1f8b7 | 2097 | } else { |
12e364b9 KC |
2098 | POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, |
2099 | POSTCODE_SEVERITY_ERR); | |
2100 | return; | |
2101 | } | |
12e364b9 KC |
2102 | POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2103 | return; | |
2104 | ||
e6bdb904 | 2105 | cleanup: |
12e364b9 | 2106 | |
911e213e | 2107 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; |
12e364b9 | 2108 | |
9232d2d6 BR |
2109 | queue_delayed_work(periodic_controlvm_workqueue, |
2110 | &periodic_controlvm_work, poll_jiffies); | |
12e364b9 KC |
2111 | } |
2112 | ||
2113 | static void | |
3032aedd | 2114 | bus_create_response(struct visorchipset_bus_info *bus_info, int response) |
12e364b9 | 2115 | { |
3032aedd | 2116 | bus_responder(CONTROLVM_BUS_CREATE, bus_info, response); |
12e364b9 KC |
2117 | } |
2118 | ||
2119 | static void | |
3032aedd | 2120 | bus_destroy_response(struct visorchipset_bus_info *bus_info, int response) |
12e364b9 | 2121 | { |
3032aedd | 2122 | bus_responder(CONTROLVM_BUS_DESTROY, bus_info, response); |
12e364b9 KC |
2123 | } |
2124 | ||
2125 | static void | |
b4b598fd | 2126 | device_create_response(struct visorchipset_device_info *dev_info, int response) |
12e364b9 | 2127 | { |
b4b598fd | 2128 | device_responder(CONTROLVM_DEVICE_CREATE, dev_info, response); |
12e364b9 KC |
2129 | } |
2130 | ||
2131 | static void | |
b4b598fd | 2132 | device_destroy_response(struct visorchipset_device_info *dev_info, int response) |
12e364b9 | 2133 | { |
b4b598fd | 2134 | device_responder(CONTROLVM_DEVICE_DESTROY, dev_info, response); |
12e364b9 KC |
2135 | } |
2136 | ||
d3368a58 | 2137 | static void |
b4b598fd DZ |
2138 | visorchipset_device_pause_response(struct visorchipset_device_info *dev_info, |
2139 | int response) | |
12e364b9 | 2140 | { |
12e364b9 | 2141 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
b4b598fd | 2142 | dev_info, response, |
bd0d2dcc | 2143 | segment_state_standby); |
12e364b9 | 2144 | } |
12e364b9 KC |
2145 | |
2146 | static void | |
b4b598fd | 2147 | device_resume_response(struct visorchipset_device_info *dev_info, int response) |
12e364b9 KC |
2148 | { |
2149 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
b4b598fd | 2150 | dev_info, response, |
bd0d2dcc | 2151 | segment_state_running); |
12e364b9 KC |
2152 | } |
2153 | ||
f4c11551 | 2154 | bool |
52063eca | 2155 | visorchipset_get_bus_info(u32 bus_no, struct visorchipset_bus_info *bus_info) |
12e364b9 | 2156 | { |
4f66520b | 2157 | void *p = bus_find(&bus_info_list, bus_no); |
26eb2c0c | 2158 | |
0aca7844 | 2159 | if (!p) |
f4c11551 | 2160 | return false; |
77db7127 | 2161 | memcpy(bus_info, p, sizeof(struct visorchipset_bus_info)); |
f4c11551 | 2162 | return true; |
12e364b9 KC |
2163 | } |
2164 | EXPORT_SYMBOL_GPL(visorchipset_get_bus_info); | |
2165 | ||
f4c11551 | 2166 | bool |
3032aedd | 2167 | visorchipset_set_bus_context(struct visorchipset_bus_info *p, void *context) |
12e364b9 | 2168 | { |
0aca7844 | 2169 | if (!p) |
f4c11551 | 2170 | return false; |
12e364b9 | 2171 | p->bus_driver_context = context; |
f4c11551 | 2172 | return true; |
12e364b9 KC |
2173 | } |
2174 | EXPORT_SYMBOL_GPL(visorchipset_set_bus_context); | |
2175 | ||
f4c11551 | 2176 | bool |
52063eca | 2177 | visorchipset_get_device_info(u32 bus_no, u32 dev_no, |
b486df19 | 2178 | struct visorchipset_device_info *dev_info) |
12e364b9 | 2179 | { |
d480f6a2 | 2180 | void *p = device_find(&dev_info_list, bus_no, dev_no); |
26eb2c0c | 2181 | |
0aca7844 | 2182 | if (!p) |
f4c11551 | 2183 | return false; |
b486df19 | 2184 | memcpy(dev_info, p, sizeof(struct visorchipset_device_info)); |
f4c11551 | 2185 | return true; |
12e364b9 KC |
2186 | } |
2187 | EXPORT_SYMBOL_GPL(visorchipset_get_device_info); | |
2188 | ||
f4c11551 | 2189 | bool |
b4b598fd DZ |
2190 | visorchipset_set_device_context(struct visorchipset_device_info *p, |
2191 | void *context) | |
12e364b9 | 2192 | { |
0aca7844 | 2193 | if (!p) |
f4c11551 | 2194 | return false; |
12e364b9 | 2195 | p->bus_driver_context = context; |
f4c11551 | 2196 | return true; |
12e364b9 KC |
2197 | } |
2198 | EXPORT_SYMBOL_GPL(visorchipset_set_device_context); | |
2199 | ||
18b87ed1 | 2200 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
2201 | struct device_attribute *attr, |
2202 | const char *buf, size_t count) | |
12e364b9 | 2203 | { |
18b87ed1 | 2204 | char msgtype[64]; |
12e364b9 | 2205 | |
66e24b76 BR |
2206 | if (sscanf(buf, "%63s", msgtype) != 1) |
2207 | return -EINVAL; | |
2208 | ||
ebec8967 | 2209 | if (!strcmp(msgtype, "CALLHOMEDISK_MOUNTED")) { |
66e24b76 BR |
2210 | chipset_events[0] = 1; |
2211 | return count; | |
ebec8967 | 2212 | } else if (!strcmp(msgtype, "MODULES_LOADED")) { |
66e24b76 BR |
2213 | chipset_events[1] = 1; |
2214 | return count; | |
e22a4a0f BR |
2215 | } |
2216 | return -EINVAL; | |
12e364b9 KC |
2217 | } |
2218 | ||
e56fa7cd BR |
2219 | /* The parahotplug/devicedisabled interface gets called by our support script |
2220 | * when an SR-IOV device has been shut down. The ID is passed to the script | |
2221 | * and then passed back when the device has been removed. | |
2222 | */ | |
2223 | static ssize_t devicedisabled_store(struct device *dev, | |
8e76e695 BR |
2224 | struct device_attribute *attr, |
2225 | const char *buf, size_t count) | |
e56fa7cd | 2226 | { |
94217363 | 2227 | unsigned int id; |
e56fa7cd | 2228 | |
ebec8967 | 2229 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2230 | return -EINVAL; |
2231 | ||
2232 | parahotplug_request_complete(id, 0); | |
2233 | return count; | |
2234 | } | |
2235 | ||
2236 | /* The parahotplug/deviceenabled interface gets called by our support script | |
2237 | * when an SR-IOV device has been recovered. The ID is passed to the script | |
2238 | * and then passed back when the device has been brought back up. | |
2239 | */ | |
2240 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
2241 | struct device_attribute *attr, |
2242 | const char *buf, size_t count) | |
e56fa7cd | 2243 | { |
94217363 | 2244 | unsigned int id; |
e56fa7cd | 2245 | |
ebec8967 | 2246 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2247 | return -EINVAL; |
2248 | ||
2249 | parahotplug_request_complete(id, 1); | |
2250 | return count; | |
2251 | } | |
2252 | ||
e3420ed6 EA |
2253 | static int |
2254 | visorchipset_mmap(struct file *file, struct vm_area_struct *vma) | |
2255 | { | |
2256 | unsigned long physaddr = 0; | |
2257 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
780fcad3 | 2258 | u64 addr = 0; |
e3420ed6 EA |
2259 | |
2260 | /* sv_enable_dfp(); */ | |
2261 | if (offset & (PAGE_SIZE - 1)) | |
2262 | return -ENXIO; /* need aligned offsets */ | |
2263 | ||
2264 | switch (offset) { | |
2265 | case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: | |
2266 | vma->vm_flags |= VM_IO; | |
2267 | if (!*file_controlvm_channel) | |
2268 | return -ENXIO; | |
2269 | ||
2270 | visorchannel_read(*file_controlvm_channel, | |
2271 | offsetof(struct spar_controlvm_channel_protocol, | |
2272 | gp_control_channel), | |
2273 | &addr, sizeof(addr)); | |
2274 | if (!addr) | |
2275 | return -ENXIO; | |
2276 | ||
2277 | physaddr = (unsigned long)addr; | |
2278 | if (remap_pfn_range(vma, vma->vm_start, | |
2279 | physaddr >> PAGE_SHIFT, | |
2280 | vma->vm_end - vma->vm_start, | |
2281 | /*pgprot_noncached */ | |
2282 | (vma->vm_page_prot))) { | |
2283 | return -EAGAIN; | |
2284 | } | |
2285 | break; | |
2286 | default: | |
2287 | return -ENXIO; | |
2288 | } | |
2289 | return 0; | |
2290 | } | |
2291 | ||
5f3a7e36 DK |
2292 | static inline s64 issue_vmcall_query_guest_virtual_time_offset(void) |
2293 | { | |
2294 | u64 result = VMCALL_SUCCESS; | |
2295 | u64 physaddr = 0; | |
2296 | ||
2297 | ISSUE_IO_VMCALL(VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET, physaddr, | |
2298 | result); | |
2299 | return result; | |
2300 | } | |
2301 | ||
2302 | static inline int issue_vmcall_update_physical_time(u64 adjustment) | |
2303 | { | |
2304 | int result = VMCALL_SUCCESS; | |
2305 | ||
2306 | ISSUE_IO_VMCALL(VMCALL_UPDATE_PHYSICAL_TIME, adjustment, result); | |
2307 | return result; | |
2308 | } | |
2309 | ||
e3420ed6 EA |
2310 | static long visorchipset_ioctl(struct file *file, unsigned int cmd, |
2311 | unsigned long arg) | |
2312 | { | |
2313 | s64 adjustment; | |
2314 | s64 vrtc_offset; | |
2315 | ||
2316 | switch (cmd) { | |
2317 | case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: | |
2318 | /* get the physical rtc offset */ | |
2319 | vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); | |
2320 | if (copy_to_user((void __user *)arg, &vrtc_offset, | |
2321 | sizeof(vrtc_offset))) { | |
2322 | return -EFAULT; | |
2323 | } | |
d5b3f1dc | 2324 | return 0; |
e3420ed6 EA |
2325 | case VMCALL_UPDATE_PHYSICAL_TIME: |
2326 | if (copy_from_user(&adjustment, (void __user *)arg, | |
2327 | sizeof(adjustment))) { | |
2328 | return -EFAULT; | |
2329 | } | |
2330 | return issue_vmcall_update_physical_time(adjustment); | |
2331 | default: | |
2332 | return -EFAULT; | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | static const struct file_operations visorchipset_fops = { | |
2337 | .owner = THIS_MODULE, | |
2338 | .open = visorchipset_open, | |
2339 | .read = NULL, | |
2340 | .write = NULL, | |
2341 | .unlocked_ioctl = visorchipset_ioctl, | |
2342 | .release = visorchipset_release, | |
2343 | .mmap = visorchipset_mmap, | |
2344 | }; | |
2345 | ||
0f570fc0 | 2346 | static int |
e3420ed6 EA |
2347 | visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) |
2348 | { | |
2349 | int rc = 0; | |
2350 | ||
2351 | file_controlvm_channel = controlvm_channel; | |
2352 | cdev_init(&file_cdev, &visorchipset_fops); | |
2353 | file_cdev.owner = THIS_MODULE; | |
2354 | if (MAJOR(major_dev) == 0) { | |
46168810 | 2355 | rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset"); |
e3420ed6 EA |
2356 | /* dynamic major device number registration required */ |
2357 | if (rc < 0) | |
2358 | return rc; | |
2359 | } else { | |
2360 | /* static major device number registration required */ | |
46168810 | 2361 | rc = register_chrdev_region(major_dev, 1, "visorchipset"); |
e3420ed6 EA |
2362 | if (rc < 0) |
2363 | return rc; | |
2364 | } | |
2365 | rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); | |
2366 | if (rc < 0) { | |
2367 | unregister_chrdev_region(major_dev, 1); | |
2368 | return rc; | |
2369 | } | |
2370 | return 0; | |
2371 | } | |
2372 | ||
55c67dca PB |
2373 | static int |
2374 | visorchipset_init(struct acpi_device *acpi_device) | |
12e364b9 | 2375 | { |
33078257 | 2376 | int rc = 0; |
d5b3f1dc | 2377 | u64 addr; |
d3368a58 JS |
2378 | int tmp_sz = sizeof(struct spar_controlvm_channel_protocol); |
2379 | uuid_le uuid = SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID; | |
2380 | ||
2381 | addr = controlvm_get_channel_address(); | |
2382 | if (!addr) | |
2383 | return -ENODEV; | |
12e364b9 | 2384 | |
4da3336c | 2385 | memset(&busdev_notifiers, 0, sizeof(busdev_notifiers)); |
84982fbf | 2386 | memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); |
12e364b9 | 2387 | |
d3368a58 JS |
2388 | controlvm_channel = visorchannel_create_with_lock(addr, tmp_sz, |
2389 | GFP_KERNEL, uuid); | |
2390 | if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( | |
2391 | visorchannel_get_header(controlvm_channel))) { | |
2392 | initialize_controlvm_payload(); | |
8a1182eb | 2393 | } else { |
d3368a58 JS |
2394 | visorchannel_destroy(controlvm_channel); |
2395 | controlvm_channel = NULL; | |
8a1182eb BR |
2396 | return -ENODEV; |
2397 | } | |
2398 | ||
5aa8ae57 BR |
2399 | major_dev = MKDEV(visorchipset_major, 0); |
2400 | rc = visorchipset_file_init(major_dev, &controlvm_channel); | |
4cb005a9 | 2401 | if (rc < 0) { |
4cb005a9 | 2402 | POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); |
a6a3989b | 2403 | goto cleanup; |
4cb005a9 | 2404 | } |
9f8d0e8b | 2405 | |
da021f02 | 2406 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2407 | |
4da3336c DK |
2408 | /* if booting in a crash kernel */ |
2409 | if (is_kdump_kernel()) | |
2410 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2411 | setup_crash_devices_work_queue); | |
2412 | else | |
2413 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2414 | controlvm_periodic_work); | |
2415 | periodic_controlvm_workqueue = | |
2416 | create_singlethread_workqueue("visorchipset_controlvm"); | |
2417 | ||
2418 | if (!periodic_controlvm_workqueue) { | |
2419 | POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC, | |
2420 | DIAG_SEVERITY_ERR); | |
2421 | rc = -ENOMEM; | |
2422 | goto cleanup; | |
2423 | } | |
2424 | most_recent_message_jiffies = jiffies; | |
2425 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
2426 | rc = queue_delayed_work(periodic_controlvm_workqueue, | |
2427 | &periodic_controlvm_work, poll_jiffies); | |
2428 | if (rc < 0) { | |
2429 | POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC, | |
2430 | DIAG_SEVERITY_ERR); | |
2431 | goto cleanup; | |
12e364b9 KC |
2432 | } |
2433 | ||
eb34e877 BR |
2434 | visorchipset_platform_device.dev.devt = major_dev; |
2435 | if (platform_device_register(&visorchipset_platform_device) < 0) { | |
4cb005a9 KC |
2436 | POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); |
2437 | rc = -1; | |
a6a3989b | 2438 | goto cleanup; |
4cb005a9 | 2439 | } |
12e364b9 | 2440 | POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); |
c79b28f7 PB |
2441 | |
2442 | rc = visorbus_init(); | |
a6a3989b | 2443 | cleanup: |
12e364b9 | 2444 | if (rc) { |
12e364b9 KC |
2445 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, |
2446 | POSTCODE_SEVERITY_ERR); | |
2447 | } | |
2448 | return rc; | |
2449 | } | |
2450 | ||
0f570fc0 | 2451 | static void |
e3420ed6 EA |
2452 | visorchipset_file_cleanup(dev_t major_dev) |
2453 | { | |
2454 | if (file_cdev.ops) | |
2455 | cdev_del(&file_cdev); | |
2456 | file_cdev.ops = NULL; | |
2457 | unregister_chrdev_region(major_dev, 1); | |
2458 | } | |
2459 | ||
55c67dca PB |
2460 | static int |
2461 | visorchipset_exit(struct acpi_device *acpi_device) | |
12e364b9 | 2462 | { |
12e364b9 KC |
2463 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2464 | ||
c79b28f7 PB |
2465 | visorbus_exit(); |
2466 | ||
4da3336c DK |
2467 | cancel_delayed_work(&periodic_controlvm_work); |
2468 | flush_workqueue(periodic_controlvm_workqueue); | |
2469 | destroy_workqueue(periodic_controlvm_workqueue); | |
2470 | periodic_controlvm_workqueue = NULL; | |
2471 | destroy_controlvm_payload_info(&controlvm_payload_info); | |
1783319f | 2472 | |
12e364b9 KC |
2473 | cleanup_controlvm_structures(); |
2474 | ||
da021f02 | 2475 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2476 | |
c3d9a224 | 2477 | visorchannel_destroy(controlvm_channel); |
8a1182eb | 2478 | |
addceb12 | 2479 | visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); |
12e364b9 | 2480 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
55c67dca PB |
2481 | |
2482 | return 0; | |
2483 | } | |
2484 | ||
2485 | static const struct acpi_device_id unisys_device_ids[] = { | |
2486 | {"PNP0A07", 0}, | |
2487 | {"", 0}, | |
2488 | }; | |
55c67dca PB |
2489 | |
2490 | static struct acpi_driver unisys_acpi_driver = { | |
2491 | .name = "unisys_acpi", | |
2492 | .class = "unisys_acpi_class", | |
2493 | .owner = THIS_MODULE, | |
2494 | .ids = unisys_device_ids, | |
2495 | .ops = { | |
2496 | .add = visorchipset_init, | |
2497 | .remove = visorchipset_exit, | |
2498 | }, | |
2499 | }; | |
d5b3f1dc EA |
2500 | static __init uint32_t visorutil_spar_detect(void) |
2501 | { | |
2502 | unsigned int eax, ebx, ecx, edx; | |
2503 | ||
2504 | if (cpu_has_hypervisor) { | |
2505 | /* check the ID */ | |
2506 | cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx); | |
2507 | return (ebx == UNISYS_SPAR_ID_EBX) && | |
2508 | (ecx == UNISYS_SPAR_ID_ECX) && | |
2509 | (edx == UNISYS_SPAR_ID_EDX); | |
2510 | } else { | |
2511 | return 0; | |
2512 | } | |
2513 | } | |
55c67dca PB |
2514 | |
2515 | static int init_unisys(void) | |
2516 | { | |
2517 | int result; | |
d5b3f1dc | 2518 | if (!visorutil_spar_detect()) |
55c67dca PB |
2519 | return -ENODEV; |
2520 | ||
2521 | result = acpi_bus_register_driver(&unisys_acpi_driver); | |
2522 | if (result) | |
2523 | return -ENODEV; | |
2524 | ||
2525 | pr_info("Unisys Visorchipset Driver Loaded.\n"); | |
2526 | return 0; | |
2527 | }; | |
2528 | ||
2529 | static void exit_unisys(void) | |
2530 | { | |
2531 | acpi_bus_unregister_driver(&unisys_acpi_driver); | |
12e364b9 KC |
2532 | } |
2533 | ||
12e364b9 | 2534 | module_param_named(major, visorchipset_major, int, S_IRUGO); |
b615d628 JS |
2535 | MODULE_PARM_DESC(visorchipset_major, |
2536 | "major device number to use for the device node"); | |
4da3336c DK |
2537 | module_param_named(visorbusregwait, visorchipset_visorbusregwait, int, S_IRUGO); |
2538 | MODULE_PARM_DESC(visorchipset_visorbusreqwait, | |
12e364b9 | 2539 | "1 to have the module wait for the visor bus to register"); |
12e364b9 KC |
2540 | module_param_named(holdchipsetready, visorchipset_holdchipsetready, |
2541 | int, S_IRUGO); | |
2542 | MODULE_PARM_DESC(visorchipset_holdchipsetready, | |
2543 | "1 to hold response to CHIPSET_READY"); | |
b615d628 | 2544 | |
55c67dca PB |
2545 | module_init(init_unisys); |
2546 | module_exit(exit_unisys); | |
12e364b9 KC |
2547 | |
2548 | MODULE_AUTHOR("Unisys"); | |
2549 | MODULE_LICENSE("GPL"); | |
2550 | MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " | |
2551 | VERSION); | |
2552 | MODULE_VERSION(VERSION); |