Commit | Line | Data |
---|---|---|
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 | |
55c67dca PB |
29 | #include "controlvmchannel.h" |
30 | #include "controlvmcompletionstatus.h" | |
31 | #include "guestlinuxdebug.h" | |
32 | #include "periodic_work.h" | |
55c67dca PB |
33 | #include "uisutils.h" |
34 | #include "version.h" | |
35 | #include "visorbus.h" | |
36 | #include "visorbus_private.h" | |
37 | ||
12e364b9 | 38 | #define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c |
12e364b9 KC |
39 | |
40 | #define MAX_NAME_SIZE 128 | |
41 | #define MAX_IP_SIZE 50 | |
42 | #define MAXOUTSTANDINGCHANNELCOMMAND 256 | |
43 | #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 | |
44 | #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 | |
45 | ||
46168810 | 46 | #define MAX_CONTROLVM_PAYLOAD_BYTES (1024*128) |
2ee0deec PB |
47 | |
48 | #define VISORCHIPSET_MMAP_CONTROLCHANOFFSET 0x00000000 | |
49 | ||
d5b3f1dc EA |
50 | |
51 | #define UNISYS_SPAR_LEAF_ID 0x40000000 | |
52 | ||
53 | /* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ | |
54 | #define UNISYS_SPAR_ID_EBX 0x73696e55 | |
55 | #define UNISYS_SPAR_ID_ECX 0x70537379 | |
56 | #define UNISYS_SPAR_ID_EDX 0x34367261 | |
57 | ||
b615d628 JS |
58 | /* |
59 | * Module parameters | |
60 | */ | |
b615d628 | 61 | static int visorchipset_major; |
4da3336c | 62 | static int visorchipset_visorbusregwait = 1; /* default is on */ |
b615d628 | 63 | static int visorchipset_holdchipsetready; |
46168810 | 64 | static unsigned long controlvm_payload_bytes_buffered; |
b615d628 | 65 | |
e3420ed6 EA |
66 | static int |
67 | visorchipset_open(struct inode *inode, struct file *file) | |
68 | { | |
69 | unsigned minor_number = iminor(inode); | |
70 | ||
71 | if (minor_number) | |
72 | return -ENODEV; | |
73 | file->private_data = NULL; | |
74 | return 0; | |
75 | } | |
76 | ||
77 | static int | |
78 | visorchipset_release(struct inode *inode, struct file *file) | |
79 | { | |
80 | return 0; | |
81 | } | |
82 | ||
12e364b9 KC |
83 | /* When the controlvm channel is idle for at least MIN_IDLE_SECONDS, |
84 | * we switch to slow polling mode. As soon as we get a controlvm | |
85 | * message, we switch back to fast polling mode. | |
86 | */ | |
87 | #define MIN_IDLE_SECONDS 10 | |
52063eca JS |
88 | static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
89 | static unsigned long most_recent_message_jiffies; /* when we got our last | |
bd5b9b32 | 90 | * controlvm message */ |
4da3336c | 91 | static int visorbusregistered; |
12e364b9 KC |
92 | |
93 | #define MAX_CHIPSET_EVENTS 2 | |
c242233e | 94 | static u8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 0 }; |
12e364b9 | 95 | |
46168810 EA |
96 | struct parser_context { |
97 | unsigned long allocbytes; | |
98 | unsigned long param_bytes; | |
99 | u8 *curr; | |
100 | unsigned long bytes_remaining; | |
101 | bool byte_stream; | |
102 | char data[0]; | |
103 | }; | |
104 | ||
9232d2d6 BR |
105 | static struct delayed_work periodic_controlvm_work; |
106 | static struct workqueue_struct *periodic_controlvm_workqueue; | |
8f1947ac | 107 | static DEFINE_SEMAPHORE(notifier_lock); |
12e364b9 | 108 | |
e3420ed6 EA |
109 | static struct cdev file_cdev; |
110 | static struct visorchannel **file_controlvm_channel; | |
da021f02 | 111 | static struct controlvm_message_header g_chipset_msg_hdr; |
59827f00 | 112 | static const uuid_le spar_diag_pool_channel_protocol_uuid = |
9eee5d1f | 113 | SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID; |
12e364b9 | 114 | /* 0xffffff is an invalid Bus/Device number */ |
52063eca JS |
115 | static u32 g_diagpool_bus_no = 0xffffff; |
116 | static u32 g_diagpool_dev_no = 0xffffff; | |
4f44b72d | 117 | static struct controlvm_message_packet g_devicechangestate_packet; |
12e364b9 | 118 | |
12e364b9 | 119 | #define is_diagpool_channel(channel_type_guid) \ |
59827f00 BR |
120 | (uuid_le_cmp(channel_type_guid,\ |
121 | spar_diag_pool_channel_protocol_uuid) == 0) | |
12e364b9 | 122 | |
1390b88c BR |
123 | static LIST_HEAD(bus_info_list); |
124 | static LIST_HEAD(dev_info_list); | |
12e364b9 | 125 | |
c3d9a224 | 126 | static struct visorchannel *controlvm_channel; |
12e364b9 | 127 | |
84982fbf | 128 | /* Manages the request payload in the controlvm channel */ |
c1f834eb | 129 | struct visor_controlvm_payload_info { |
c242233e | 130 | u8 __iomem *ptr; /* pointer to base address of payload pool */ |
5fc0229a | 131 | u64 offset; /* offset from beginning of controlvm |
12e364b9 | 132 | * channel to beginning of payload * pool */ |
b3c55b13 | 133 | u32 bytes; /* number of bytes in payload pool */ |
c1f834eb JS |
134 | }; |
135 | ||
136 | static struct visor_controlvm_payload_info controlvm_payload_info; | |
12e364b9 | 137 | |
ea33b4ee BR |
138 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / |
139 | * CONTROLVM_DUMP_GETTEXTDUMP / CONTROLVM_DUMP_COMPLETE conversation. | |
140 | */ | |
c1f834eb | 141 | struct visor_livedump_info { |
ea33b4ee BR |
142 | struct controlvm_message_header dumpcapture_header; |
143 | struct controlvm_message_header gettextdump_header; | |
144 | struct controlvm_message_header dumpcomplete_header; | |
f4c11551 | 145 | bool gettextdump_outstanding; |
12e364b9 | 146 | u32 crc32; |
52063eca | 147 | unsigned long length; |
12e364b9 | 148 | atomic_t buffers_in_use; |
52063eca | 149 | unsigned long destination; |
c1f834eb JS |
150 | }; |
151 | ||
152 | static struct visor_livedump_info livedump_info; | |
12e364b9 KC |
153 | |
154 | /* The following globals are used to handle the scenario where we are unable to | |
155 | * offload the payload from a controlvm message due to memory requirements. In | |
156 | * this scenario, we simply stash the controlvm message, then attempt to | |
157 | * process it again the next time controlvm_periodic_work() runs. | |
158 | */ | |
7166ed19 | 159 | static struct controlvm_message controlvm_pending_msg; |
c79b28f7 | 160 | static bool controlvm_pending_msg_valid; |
12e364b9 | 161 | |
12e364b9 KC |
162 | /* This identifies a data buffer that has been received via a controlvm messages |
163 | * in a remote --> local CONTROLVM_TRANSMIT_FILE conversation. | |
164 | */ | |
165 | struct putfile_buffer_entry { | |
166 | struct list_head next; /* putfile_buffer_entry list */ | |
317d9614 | 167 | struct parser_context *parser_ctx; /* points to input data buffer */ |
12e364b9 KC |
168 | }; |
169 | ||
170 | /* List of struct putfile_request *, via next_putfile_request member. | |
171 | * Each entry in this list identifies an outstanding TRANSMIT_FILE | |
172 | * conversation. | |
173 | */ | |
1eee0011 | 174 | static LIST_HEAD(putfile_request_list); |
12e364b9 KC |
175 | |
176 | /* This describes a buffer and its current state of transfer (e.g., how many | |
177 | * bytes have already been supplied as putfile data, and how many bytes are | |
178 | * remaining) for a putfile_request. | |
179 | */ | |
180 | struct putfile_active_buffer { | |
181 | /* a payload from a controlvm message, containing a file data buffer */ | |
317d9614 | 182 | struct parser_context *parser_ctx; |
12e364b9 KC |
183 | /* points within data area of parser_ctx to next byte of data */ |
184 | u8 *pnext; | |
185 | /* # bytes left from <pnext> to the end of this data buffer */ | |
186 | size_t bytes_remaining; | |
187 | }; | |
188 | ||
189 | #define PUTFILE_REQUEST_SIG 0x0906101302281211 | |
190 | /* This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE | |
191 | * conversation. Structs of this type are dynamically linked into | |
192 | * <Putfile_request_list>. | |
193 | */ | |
194 | struct putfile_request { | |
195 | u64 sig; /* PUTFILE_REQUEST_SIG */ | |
196 | ||
197 | /* header from original TransmitFile request */ | |
98d7b594 | 198 | struct controlvm_message_header controlvm_header; |
12e364b9 KC |
199 | u64 file_request_number; /* from original TransmitFile request */ |
200 | ||
201 | /* link to next struct putfile_request */ | |
202 | struct list_head next_putfile_request; | |
203 | ||
204 | /* most-recent sequence number supplied via a controlvm message */ | |
205 | u64 data_sequence_number; | |
206 | ||
207 | /* head of putfile_buffer_entry list, which describes the data to be | |
208 | * supplied as putfile data; | |
209 | * - this list is added to when controlvm messages come in that supply | |
210 | * file data | |
211 | * - this list is removed from via the hotplug program that is actually | |
212 | * consuming these buffers to write as file data */ | |
213 | struct list_head input_buffer_list; | |
214 | spinlock_t req_list_lock; /* lock for input_buffer_list */ | |
215 | ||
216 | /* waiters for input_buffer_list to go non-empty */ | |
217 | wait_queue_head_t input_buffer_wq; | |
218 | ||
219 | /* data not yet read within current putfile_buffer_entry */ | |
220 | struct putfile_active_buffer active_buf; | |
221 | ||
222 | /* <0 = failed, 0 = in-progress, >0 = successful; */ | |
223 | /* note that this must be set with req_list_lock, and if you set <0, */ | |
224 | /* it is your responsibility to also free up all of the other objects */ | |
225 | /* in this struct (like input_buffer_list, active_buf.parser_ctx) */ | |
226 | /* before releasing the lock */ | |
227 | int completion_status; | |
228 | }; | |
229 | ||
12e364b9 KC |
230 | struct parahotplug_request { |
231 | struct list_head list; | |
232 | int id; | |
233 | unsigned long expiration; | |
3ab47701 | 234 | struct controlvm_message msg; |
12e364b9 KC |
235 | }; |
236 | ||
ddf5de53 BR |
237 | static LIST_HEAD(parahotplug_request_list); |
238 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ | |
12e364b9 KC |
239 | static void parahotplug_process_list(void); |
240 | ||
241 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / | |
242 | * CONTROLVM_REPORTEVENT. | |
243 | */ | |
4da3336c | 244 | static struct visorchipset_busdev_notifiers busdev_notifiers; |
12e364b9 | 245 | |
52063eca JS |
246 | static void bus_create_response(u32 bus_no, int response); |
247 | static void bus_destroy_response(u32 bus_no, int response); | |
248 | static void device_create_response(u32 bus_no, u32 dev_no, int response); | |
249 | static void device_destroy_response(u32 bus_no, u32 dev_no, int response); | |
250 | static void device_resume_response(u32 bus_no, u32 dev_no, int response); | |
12e364b9 | 251 | |
2ee0deec PB |
252 | static void visorchipset_device_pause_response(u32 bus_no, u32 dev_no, |
253 | int response); | |
254 | ||
8e3fedd6 | 255 | static struct visorchipset_busdev_responders busdev_responders = { |
12e364b9 KC |
256 | .bus_create = bus_create_response, |
257 | .bus_destroy = bus_destroy_response, | |
258 | .device_create = device_create_response, | |
259 | .device_destroy = device_destroy_response, | |
927c7927 | 260 | .device_pause = visorchipset_device_pause_response, |
12e364b9 KC |
261 | .device_resume = device_resume_response, |
262 | }; | |
263 | ||
264 | /* info for /dev/visorchipset */ | |
5aa8ae57 | 265 | static dev_t major_dev = -1; /**< indicates major num for device */ |
12e364b9 | 266 | |
19f6634f BR |
267 | /* prototypes for attributes */ |
268 | static ssize_t toolaction_show(struct device *dev, | |
8e76e695 | 269 | struct device_attribute *attr, char *buf); |
19f6634f | 270 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 BR |
271 | struct device_attribute *attr, |
272 | const char *buf, size_t count); | |
19f6634f BR |
273 | static DEVICE_ATTR_RW(toolaction); |
274 | ||
54b31229 | 275 | static ssize_t boottotool_show(struct device *dev, |
8e76e695 | 276 | struct device_attribute *attr, char *buf); |
54b31229 | 277 | static ssize_t boottotool_store(struct device *dev, |
8e76e695 BR |
278 | struct device_attribute *attr, const char *buf, |
279 | size_t count); | |
54b31229 BR |
280 | static DEVICE_ATTR_RW(boottotool); |
281 | ||
422af17c | 282 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8e76e695 | 283 | char *buf); |
422af17c | 284 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 285 | const char *buf, size_t count); |
422af17c BR |
286 | static DEVICE_ATTR_RW(error); |
287 | ||
288 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 289 | char *buf); |
422af17c | 290 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 291 | const char *buf, size_t count); |
422af17c BR |
292 | static DEVICE_ATTR_RW(textid); |
293 | ||
294 | static ssize_t remaining_steps_show(struct device *dev, | |
8e76e695 | 295 | struct device_attribute *attr, char *buf); |
422af17c | 296 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 BR |
297 | struct device_attribute *attr, |
298 | const char *buf, size_t count); | |
422af17c BR |
299 | static DEVICE_ATTR_RW(remaining_steps); |
300 | ||
18b87ed1 | 301 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
302 | struct device_attribute *attr, |
303 | const char *buf, size_t count); | |
18b87ed1 BR |
304 | static DEVICE_ATTR_WO(chipsetready); |
305 | ||
e56fa7cd | 306 | static ssize_t devicedisabled_store(struct device *dev, |
8e76e695 BR |
307 | struct device_attribute *attr, |
308 | const char *buf, size_t count); | |
e56fa7cd BR |
309 | static DEVICE_ATTR_WO(devicedisabled); |
310 | ||
311 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
312 | struct device_attribute *attr, |
313 | const char *buf, size_t count); | |
e56fa7cd BR |
314 | static DEVICE_ATTR_WO(deviceenabled); |
315 | ||
19f6634f BR |
316 | static struct attribute *visorchipset_install_attrs[] = { |
317 | &dev_attr_toolaction.attr, | |
54b31229 | 318 | &dev_attr_boottotool.attr, |
422af17c BR |
319 | &dev_attr_error.attr, |
320 | &dev_attr_textid.attr, | |
321 | &dev_attr_remaining_steps.attr, | |
19f6634f BR |
322 | NULL |
323 | }; | |
324 | ||
325 | static struct attribute_group visorchipset_install_group = { | |
326 | .name = "install", | |
327 | .attrs = visorchipset_install_attrs | |
328 | }; | |
329 | ||
18b87ed1 BR |
330 | static struct attribute *visorchipset_guest_attrs[] = { |
331 | &dev_attr_chipsetready.attr, | |
332 | NULL | |
333 | }; | |
334 | ||
335 | static struct attribute_group visorchipset_guest_group = { | |
336 | .name = "guest", | |
337 | .attrs = visorchipset_guest_attrs | |
338 | }; | |
339 | ||
e56fa7cd BR |
340 | static struct attribute *visorchipset_parahotplug_attrs[] = { |
341 | &dev_attr_devicedisabled.attr, | |
342 | &dev_attr_deviceenabled.attr, | |
343 | NULL | |
344 | }; | |
345 | ||
346 | static struct attribute_group visorchipset_parahotplug_group = { | |
347 | .name = "parahotplug", | |
348 | .attrs = visorchipset_parahotplug_attrs | |
349 | }; | |
350 | ||
19f6634f BR |
351 | static const struct attribute_group *visorchipset_dev_groups[] = { |
352 | &visorchipset_install_group, | |
18b87ed1 | 353 | &visorchipset_guest_group, |
e56fa7cd | 354 | &visorchipset_parahotplug_group, |
19f6634f BR |
355 | NULL |
356 | }; | |
357 | ||
12e364b9 | 358 | /* /sys/devices/platform/visorchipset */ |
eb34e877 | 359 | static struct platform_device visorchipset_platform_device = { |
12e364b9 KC |
360 | .name = "visorchipset", |
361 | .id = -1, | |
19f6634f | 362 | .dev.groups = visorchipset_dev_groups, |
12e364b9 KC |
363 | }; |
364 | ||
365 | /* Function prototypes */ | |
b3168c70 | 366 | static void controlvm_respond(struct controlvm_message_header *msg_hdr, |
98d7b594 BR |
367 | int response); |
368 | static void controlvm_respond_chipset_init( | |
b3168c70 | 369 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 BR |
370 | enum ultra_chipset_feature features); |
371 | static void controlvm_respond_physdev_changestate( | |
b3168c70 | 372 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 373 | struct spar_segment_state state); |
12e364b9 | 374 | |
46168810 | 375 | |
2ee0deec PB |
376 | static void parser_done(struct parser_context *ctx); |
377 | ||
46168810 | 378 | static struct parser_context * |
fbf35536 | 379 | parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry) |
46168810 EA |
380 | { |
381 | int allocbytes = sizeof(struct parser_context) + bytes; | |
382 | struct parser_context *rc = NULL; | |
383 | struct parser_context *ctx = NULL; | |
46168810 EA |
384 | |
385 | if (retry) | |
386 | *retry = false; | |
cc55b5c5 JS |
387 | |
388 | /* | |
389 | * alloc an 0 extra byte to ensure payload is | |
390 | * '\0'-terminated | |
391 | */ | |
392 | allocbytes++; | |
46168810 EA |
393 | if ((controlvm_payload_bytes_buffered + bytes) |
394 | > MAX_CONTROLVM_PAYLOAD_BYTES) { | |
395 | if (retry) | |
396 | *retry = true; | |
397 | rc = NULL; | |
398 | goto cleanup; | |
399 | } | |
400 | ctx = kzalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY); | |
401 | if (!ctx) { | |
402 | if (retry) | |
403 | *retry = true; | |
404 | rc = NULL; | |
405 | goto cleanup; | |
406 | } | |
407 | ||
408 | ctx->allocbytes = allocbytes; | |
409 | ctx->param_bytes = bytes; | |
410 | ctx->curr = NULL; | |
411 | ctx->bytes_remaining = 0; | |
412 | ctx->byte_stream = false; | |
413 | if (local) { | |
414 | void *p; | |
415 | ||
416 | if (addr > virt_to_phys(high_memory - 1)) { | |
417 | rc = NULL; | |
418 | goto cleanup; | |
419 | } | |
420 | p = __va((unsigned long) (addr)); | |
421 | memcpy(ctx->data, p, bytes); | |
422 | } else { | |
dd412751 JS |
423 | void __iomem *mapping; |
424 | ||
425 | if (!request_mem_region(addr, bytes, "visorchipset")) { | |
46168810 EA |
426 | rc = NULL; |
427 | goto cleanup; | |
428 | } | |
712c03dc | 429 | |
dd412751 JS |
430 | mapping = ioremap_cache(addr, bytes); |
431 | if (!mapping) { | |
432 | release_mem_region(addr, bytes); | |
46168810 EA |
433 | rc = NULL; |
434 | goto cleanup; | |
435 | } | |
dd412751 JS |
436 | memcpy_fromio(ctx->data, mapping, bytes); |
437 | release_mem_region(addr, bytes); | |
46168810 | 438 | } |
46168810 | 439 | |
cc55b5c5 | 440 | ctx->byte_stream = true; |
46168810 EA |
441 | rc = ctx; |
442 | cleanup: | |
46168810 EA |
443 | if (rc) { |
444 | controlvm_payload_bytes_buffered += ctx->param_bytes; | |
445 | } else { | |
446 | if (ctx) { | |
447 | parser_done(ctx); | |
448 | ctx = NULL; | |
449 | } | |
450 | } | |
451 | return rc; | |
452 | } | |
453 | ||
464129ed | 454 | static uuid_le |
46168810 EA |
455 | parser_id_get(struct parser_context *ctx) |
456 | { | |
457 | struct spar_controlvm_parameters_header *phdr = NULL; | |
458 | ||
459 | if (ctx == NULL) | |
460 | return NULL_UUID_LE; | |
461 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
462 | return phdr->id; | |
463 | } | |
464 | ||
2ee0deec PB |
465 | /** Describes the state from the perspective of which controlvm messages have |
466 | * been received for a bus or device. | |
467 | */ | |
468 | ||
469 | enum PARSER_WHICH_STRING { | |
470 | PARSERSTRING_INITIATOR, | |
471 | PARSERSTRING_TARGET, | |
472 | PARSERSTRING_CONNECTION, | |
473 | PARSERSTRING_NAME, /* TODO: only PARSERSTRING_NAME is used ? */ | |
474 | }; | |
475 | ||
464129ed | 476 | static void |
2ee0deec PB |
477 | parser_param_start(struct parser_context *ctx, |
478 | enum PARSER_WHICH_STRING which_string) | |
46168810 EA |
479 | { |
480 | struct spar_controlvm_parameters_header *phdr = NULL; | |
481 | ||
482 | if (ctx == NULL) | |
483 | goto Away; | |
484 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
485 | switch (which_string) { | |
486 | case PARSERSTRING_INITIATOR: | |
487 | ctx->curr = ctx->data + phdr->initiator_offset; | |
488 | ctx->bytes_remaining = phdr->initiator_length; | |
489 | break; | |
490 | case PARSERSTRING_TARGET: | |
491 | ctx->curr = ctx->data + phdr->target_offset; | |
492 | ctx->bytes_remaining = phdr->target_length; | |
493 | break; | |
494 | case PARSERSTRING_CONNECTION: | |
495 | ctx->curr = ctx->data + phdr->connection_offset; | |
496 | ctx->bytes_remaining = phdr->connection_length; | |
497 | break; | |
498 | case PARSERSTRING_NAME: | |
499 | ctx->curr = ctx->data + phdr->name_offset; | |
500 | ctx->bytes_remaining = phdr->name_length; | |
501 | break; | |
502 | default: | |
503 | break; | |
504 | } | |
505 | ||
506 | Away: | |
507 | return; | |
508 | } | |
509 | ||
464129ed | 510 | static void parser_done(struct parser_context *ctx) |
46168810 EA |
511 | { |
512 | if (!ctx) | |
513 | return; | |
514 | controlvm_payload_bytes_buffered -= ctx->param_bytes; | |
515 | kfree(ctx); | |
516 | } | |
517 | ||
464129ed | 518 | static void * |
46168810 EA |
519 | parser_string_get(struct parser_context *ctx) |
520 | { | |
521 | u8 *pscan; | |
522 | unsigned long nscan; | |
523 | int value_length = -1; | |
524 | void *value = NULL; | |
525 | int i; | |
526 | ||
527 | if (!ctx) | |
528 | return NULL; | |
529 | pscan = ctx->curr; | |
530 | nscan = ctx->bytes_remaining; | |
531 | if (nscan == 0) | |
532 | return NULL; | |
533 | if (!pscan) | |
534 | return NULL; | |
535 | for (i = 0, value_length = -1; i < nscan; i++) | |
536 | if (pscan[i] == '\0') { | |
537 | value_length = i; | |
538 | break; | |
539 | } | |
540 | if (value_length < 0) /* '\0' was not included in the length */ | |
541 | value_length = nscan; | |
542 | value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY); | |
543 | if (value == NULL) | |
544 | return NULL; | |
545 | if (value_length > 0) | |
546 | memcpy(value, pscan, value_length); | |
547 | ((u8 *) (value))[value_length] = '\0'; | |
548 | return value; | |
549 | } | |
550 | ||
551 | ||
d746cb55 VB |
552 | static ssize_t toolaction_show(struct device *dev, |
553 | struct device_attribute *attr, | |
554 | char *buf) | |
19f6634f | 555 | { |
01f4d85a | 556 | u8 tool_action; |
19f6634f | 557 | |
c3d9a224 | 558 | visorchannel_read(controlvm_channel, |
d19642f6 | 559 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 | 560 | tool_action), &tool_action, sizeof(u8)); |
01f4d85a | 561 | return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action); |
19f6634f BR |
562 | } |
563 | ||
d746cb55 VB |
564 | static ssize_t toolaction_store(struct device *dev, |
565 | struct device_attribute *attr, | |
566 | const char *buf, size_t count) | |
19f6634f | 567 | { |
01f4d85a | 568 | u8 tool_action; |
66e24b76 | 569 | int ret; |
19f6634f | 570 | |
ebec8967 | 571 | if (kstrtou8(buf, 10, &tool_action)) |
66e24b76 BR |
572 | return -EINVAL; |
573 | ||
c3d9a224 | 574 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
575 | offsetof(struct spar_controlvm_channel_protocol, |
576 | tool_action), | |
01f4d85a | 577 | &tool_action, sizeof(u8)); |
66e24b76 BR |
578 | |
579 | if (ret) | |
580 | return ret; | |
e22a4a0f | 581 | return count; |
19f6634f BR |
582 | } |
583 | ||
d746cb55 VB |
584 | static ssize_t boottotool_show(struct device *dev, |
585 | struct device_attribute *attr, | |
586 | char *buf) | |
54b31229 | 587 | { |
365522d9 | 588 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 589 | |
c3d9a224 | 590 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
591 | offsetof(struct spar_controlvm_channel_protocol, |
592 | efi_spar_ind), &efi_spar_indication, | |
593 | sizeof(struct efi_spar_indication)); | |
54b31229 | 594 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
8e76e695 | 595 | efi_spar_indication.boot_to_tool); |
54b31229 BR |
596 | } |
597 | ||
d746cb55 VB |
598 | static ssize_t boottotool_store(struct device *dev, |
599 | struct device_attribute *attr, | |
600 | const char *buf, size_t count) | |
54b31229 | 601 | { |
66e24b76 | 602 | int val, ret; |
365522d9 | 603 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 604 | |
ebec8967 | 605 | if (kstrtoint(buf, 10, &val)) |
66e24b76 BR |
606 | return -EINVAL; |
607 | ||
365522d9 | 608 | efi_spar_indication.boot_to_tool = val; |
c3d9a224 | 609 | ret = visorchannel_write(controlvm_channel, |
d19642f6 | 610 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 BR |
611 | efi_spar_ind), &(efi_spar_indication), |
612 | sizeof(struct efi_spar_indication)); | |
66e24b76 BR |
613 | |
614 | if (ret) | |
615 | return ret; | |
e22a4a0f | 616 | return count; |
54b31229 | 617 | } |
422af17c BR |
618 | |
619 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 620 | char *buf) |
422af17c BR |
621 | { |
622 | u32 error; | |
623 | ||
8e76e695 BR |
624 | visorchannel_read(controlvm_channel, |
625 | offsetof(struct spar_controlvm_channel_protocol, | |
626 | installation_error), | |
627 | &error, sizeof(u32)); | |
422af17c BR |
628 | return scnprintf(buf, PAGE_SIZE, "%i\n", error); |
629 | } | |
630 | ||
631 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 632 | const char *buf, size_t count) |
422af17c BR |
633 | { |
634 | u32 error; | |
66e24b76 | 635 | int ret; |
422af17c | 636 | |
ebec8967 | 637 | if (kstrtou32(buf, 10, &error)) |
66e24b76 BR |
638 | return -EINVAL; |
639 | ||
c3d9a224 | 640 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
641 | offsetof(struct spar_controlvm_channel_protocol, |
642 | installation_error), | |
643 | &error, sizeof(u32)); | |
66e24b76 BR |
644 | if (ret) |
645 | return ret; | |
e22a4a0f | 646 | return count; |
422af17c BR |
647 | } |
648 | ||
649 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 650 | char *buf) |
422af17c | 651 | { |
10dbf0e3 | 652 | u32 text_id; |
422af17c | 653 | |
8e76e695 BR |
654 | visorchannel_read(controlvm_channel, |
655 | offsetof(struct spar_controlvm_channel_protocol, | |
656 | installation_text_id), | |
657 | &text_id, sizeof(u32)); | |
10dbf0e3 | 658 | return scnprintf(buf, PAGE_SIZE, "%i\n", text_id); |
422af17c BR |
659 | } |
660 | ||
661 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 662 | const char *buf, size_t count) |
422af17c | 663 | { |
10dbf0e3 | 664 | u32 text_id; |
66e24b76 | 665 | int ret; |
422af17c | 666 | |
ebec8967 | 667 | if (kstrtou32(buf, 10, &text_id)) |
66e24b76 BR |
668 | return -EINVAL; |
669 | ||
c3d9a224 | 670 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
671 | offsetof(struct spar_controlvm_channel_protocol, |
672 | installation_text_id), | |
673 | &text_id, sizeof(u32)); | |
66e24b76 BR |
674 | if (ret) |
675 | return ret; | |
e22a4a0f | 676 | return count; |
422af17c BR |
677 | } |
678 | ||
422af17c | 679 | static ssize_t remaining_steps_show(struct device *dev, |
8e76e695 | 680 | struct device_attribute *attr, char *buf) |
422af17c | 681 | { |
ee8da290 | 682 | u16 remaining_steps; |
422af17c | 683 | |
c3d9a224 | 684 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
685 | offsetof(struct spar_controlvm_channel_protocol, |
686 | installation_remaining_steps), | |
687 | &remaining_steps, sizeof(u16)); | |
ee8da290 | 688 | return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps); |
422af17c BR |
689 | } |
690 | ||
691 | static ssize_t remaining_steps_store(struct device *dev, | |
8e76e695 BR |
692 | struct device_attribute *attr, |
693 | const char *buf, size_t count) | |
422af17c | 694 | { |
ee8da290 | 695 | u16 remaining_steps; |
66e24b76 | 696 | int ret; |
422af17c | 697 | |
ebec8967 | 698 | if (kstrtou16(buf, 10, &remaining_steps)) |
66e24b76 BR |
699 | return -EINVAL; |
700 | ||
c3d9a224 | 701 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
702 | offsetof(struct spar_controlvm_channel_protocol, |
703 | installation_remaining_steps), | |
704 | &remaining_steps, sizeof(u16)); | |
66e24b76 BR |
705 | if (ret) |
706 | return ret; | |
e22a4a0f | 707 | return count; |
422af17c BR |
708 | } |
709 | ||
12e364b9 | 710 | static void |
9b989a98 | 711 | bus_info_clear(void *v) |
12e364b9 | 712 | { |
bbd4be30 | 713 | struct visorchipset_bus_info *p = (struct visorchipset_bus_info *) v; |
12e364b9 | 714 | |
12e364b9 | 715 | kfree(p->name); |
12e364b9 | 716 | kfree(p->description); |
33192fa1 | 717 | memset(p, 0, sizeof(struct visorchipset_bus_info)); |
12e364b9 KC |
718 | } |
719 | ||
720 | static void | |
9b989a98 | 721 | dev_info_clear(void *v) |
12e364b9 | 722 | { |
246e0cd0 | 723 | struct visorchipset_device_info *p = |
bbd4be30 | 724 | (struct visorchipset_device_info *) v; |
26eb2c0c | 725 | |
246e0cd0 | 726 | memset(p, 0, sizeof(struct visorchipset_device_info)); |
12e364b9 KC |
727 | } |
728 | ||
4f66520b JS |
729 | static struct visorchipset_bus_info * |
730 | bus_find(struct list_head *list, u32 bus_no) | |
731 | { | |
732 | struct visorchipset_bus_info *p; | |
733 | ||
734 | list_for_each_entry(p, list, entry) { | |
735 | if (p->bus_no == bus_no) | |
736 | return p; | |
737 | } | |
738 | ||
739 | return NULL; | |
740 | } | |
741 | ||
d480f6a2 JS |
742 | static struct visorchipset_device_info * |
743 | device_find(struct list_head *list, u32 bus_no, u32 dev_no) | |
744 | { | |
745 | struct visorchipset_device_info *p; | |
746 | ||
747 | list_for_each_entry(p, list, entry) { | |
748 | if (p->bus_no == bus_no && p->dev_no == dev_no) | |
749 | return p; | |
750 | } | |
751 | ||
752 | return NULL; | |
753 | } | |
754 | ||
28723521 JS |
755 | static void busdevices_del(struct list_head *list, u32 bus_no) |
756 | { | |
757 | struct visorchipset_device_info *p, *tmp; | |
758 | ||
759 | list_for_each_entry_safe(p, tmp, list, entry) { | |
760 | if (p->bus_no == bus_no) { | |
761 | list_del(&p->entry); | |
762 | kfree(p); | |
763 | } | |
764 | } | |
765 | } | |
766 | ||
c242233e | 767 | static u8 |
12e364b9 KC |
768 | check_chipset_events(void) |
769 | { | |
770 | int i; | |
c242233e | 771 | u8 send_msg = 1; |
12e364b9 KC |
772 | /* Check events to determine if response should be sent */ |
773 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
774 | send_msg &= chipset_events[i]; | |
775 | return send_msg; | |
776 | } | |
777 | ||
778 | static void | |
779 | clear_chipset_events(void) | |
780 | { | |
781 | int i; | |
782 | /* Clear chipset_events */ | |
783 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
784 | chipset_events[i] = 0; | |
785 | } | |
786 | ||
787 | void | |
4da3336c | 788 | visorchipset_register_busdev( |
fe90d892 | 789 | struct visorchipset_busdev_notifiers *notifiers, |
929aa8ae | 790 | struct visorchipset_busdev_responders *responders, |
1e7a59c1 | 791 | struct ultra_vbus_deviceinfo *driver_info) |
12e364b9 | 792 | { |
8f1947ac | 793 | down(¬ifier_lock); |
38f736e9 | 794 | if (!notifiers) { |
4da3336c DK |
795 | memset(&busdev_notifiers, 0, |
796 | sizeof(busdev_notifiers)); | |
797 | visorbusregistered = 0; /* clear flag */ | |
12e364b9 | 798 | } else { |
4da3336c DK |
799 | busdev_notifiers = *notifiers; |
800 | visorbusregistered = 1; /* set flag */ | |
12e364b9 KC |
801 | } |
802 | if (responders) | |
8e3fedd6 | 803 | *responders = busdev_responders; |
1e7a59c1 BR |
804 | if (driver_info) |
805 | bus_device_info_init(driver_info, "chipset", "visorchipset", | |
8e76e695 | 806 | VERSION, NULL); |
12e364b9 | 807 | |
8f1947ac | 808 | up(¬ifier_lock); |
12e364b9 | 809 | } |
4da3336c | 810 | EXPORT_SYMBOL_GPL(visorchipset_register_busdev); |
12e364b9 KC |
811 | |
812 | static void | |
813 | cleanup_controlvm_structures(void) | |
814 | { | |
33192fa1 | 815 | struct visorchipset_bus_info *bi, *tmp_bi; |
246e0cd0 | 816 | struct visorchipset_device_info *di, *tmp_di; |
12e364b9 | 817 | |
1390b88c | 818 | list_for_each_entry_safe(bi, tmp_bi, &bus_info_list, entry) { |
9b989a98 | 819 | bus_info_clear(bi); |
12e364b9 KC |
820 | list_del(&bi->entry); |
821 | kfree(bi); | |
822 | } | |
823 | ||
1390b88c | 824 | list_for_each_entry_safe(di, tmp_di, &dev_info_list, entry) { |
9b989a98 | 825 | dev_info_clear(di); |
12e364b9 KC |
826 | list_del(&di->entry); |
827 | kfree(di); | |
828 | } | |
829 | } | |
830 | ||
831 | static void | |
3ab47701 | 832 | chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
833 | { |
834 | static int chipset_inited; | |
b9b141e8 | 835 | enum ultra_chipset_feature features = 0; |
12e364b9 KC |
836 | int rc = CONTROLVM_RESP_SUCCESS; |
837 | ||
838 | POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
839 | if (chipset_inited) { | |
22ad57ba | 840 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
e3199b2e | 841 | goto cleanup; |
12e364b9 KC |
842 | } |
843 | chipset_inited = 1; | |
844 | POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); | |
845 | ||
846 | /* Set features to indicate we support parahotplug (if Command | |
847 | * also supports it). */ | |
848 | features = | |
2ea5117b | 849 | inmsg->cmd.init_chipset. |
12e364b9 KC |
850 | features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; |
851 | ||
852 | /* Set the "reply" bit so Command knows this is a | |
853 | * features-aware driver. */ | |
854 | features |= ULTRA_CHIPSET_FEATURE_REPLY; | |
855 | ||
e3199b2e | 856 | cleanup: |
12e364b9 KC |
857 | if (rc < 0) |
858 | cleanup_controlvm_structures(); | |
98d7b594 | 859 | if (inmsg->hdr.flags.response_expected) |
12e364b9 KC |
860 | controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
861 | } | |
862 | ||
863 | static void | |
3ab47701 | 864 | controlvm_init_response(struct controlvm_message *msg, |
b3168c70 | 865 | struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 866 | { |
3ab47701 | 867 | memset(msg, 0, sizeof(struct controlvm_message)); |
b3168c70 | 868 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); |
98d7b594 BR |
869 | msg->hdr.payload_bytes = 0; |
870 | msg->hdr.payload_vm_offset = 0; | |
871 | msg->hdr.payload_max_bytes = 0; | |
12e364b9 | 872 | if (response < 0) { |
98d7b594 BR |
873 | msg->hdr.flags.failed = 1; |
874 | msg->hdr.completion_status = (u32) (-response); | |
12e364b9 KC |
875 | } |
876 | } | |
877 | ||
878 | static void | |
b3168c70 | 879 | controlvm_respond(struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 880 | { |
3ab47701 | 881 | struct controlvm_message outmsg; |
26eb2c0c | 882 | |
b3168c70 | 883 | controlvm_init_response(&outmsg, msg_hdr, response); |
12e364b9 KC |
884 | /* For DiagPool channel DEVICE_CHANGESTATE, we need to send |
885 | * back the deviceChangeState structure in the packet. */ | |
b3168c70 | 886 | if (msg_hdr->id == CONTROLVM_DEVICE_CHANGESTATE && |
0639ba67 BR |
887 | g_devicechangestate_packet.device_change_state.bus_no == |
888 | g_diagpool_bus_no && | |
889 | g_devicechangestate_packet.device_change_state.dev_no == | |
83d48905 | 890 | g_diagpool_dev_no) |
4f44b72d | 891 | outmsg.cmd = g_devicechangestate_packet; |
2098dbd1 | 892 | if (outmsg.hdr.flags.test_message == 1) |
12e364b9 | 893 | return; |
2098dbd1 | 894 | |
c3d9a224 | 895 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 896 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
897 | return; |
898 | } | |
899 | } | |
900 | ||
901 | static void | |
b3168c70 | 902 | controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, |
98d7b594 | 903 | int response, |
b9b141e8 | 904 | enum ultra_chipset_feature features) |
12e364b9 | 905 | { |
3ab47701 | 906 | struct controlvm_message outmsg; |
26eb2c0c | 907 | |
b3168c70 | 908 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b | 909 | outmsg.cmd.init_chipset.features = features; |
c3d9a224 | 910 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 911 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
912 | return; |
913 | } | |
914 | } | |
915 | ||
98d7b594 | 916 | static void controlvm_respond_physdev_changestate( |
b3168c70 | 917 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 918 | struct spar_segment_state state) |
12e364b9 | 919 | { |
3ab47701 | 920 | struct controlvm_message outmsg; |
26eb2c0c | 921 | |
b3168c70 | 922 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b BR |
923 | outmsg.cmd.device_change_state.state = state; |
924 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
c3d9a224 | 925 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 926 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
927 | return; |
928 | } | |
929 | } | |
930 | ||
2ee0deec PB |
931 | enum crash_obj_type { |
932 | CRASH_DEV, | |
933 | CRASH_BUS, | |
934 | }; | |
935 | ||
12e364b9 | 936 | static void |
52063eca | 937 | bus_responder(enum controlvm_id cmd_id, u32 bus_no, int response) |
12e364b9 | 938 | { |
e82ba62e | 939 | struct visorchipset_bus_info *p; |
f4c11551 | 940 | bool need_clear = false; |
12e364b9 | 941 | |
4f66520b | 942 | p = bus_find(&bus_info_list, bus_no); |
0aca7844 | 943 | if (!p) |
12e364b9 | 944 | return; |
0aca7844 | 945 | |
12e364b9 | 946 | if (response < 0) { |
fbb31f48 | 947 | if ((cmd_id == CONTROLVM_BUS_CREATE) && |
12e364b9 KC |
948 | (response != (-CONTROLVM_RESP_ERROR_ALREADY_DONE))) |
949 | /* undo the row we just created... */ | |
28723521 | 950 | busdevices_del(&dev_info_list, bus_no); |
12e364b9 | 951 | } else { |
fbb31f48 | 952 | if (cmd_id == CONTROLVM_BUS_CREATE) |
12e364b9 | 953 | p->state.created = 1; |
fbb31f48 | 954 | if (cmd_id == CONTROLVM_BUS_DESTROY) |
f4c11551 | 955 | need_clear = true; |
12e364b9 KC |
956 | } |
957 | ||
0aca7844 | 958 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 959 | return; /* no controlvm response needed */ |
6b59b31d | 960 | if (p->pending_msg_hdr.id != (u32)cmd_id) |
12e364b9 | 961 | return; |
33192fa1 BR |
962 | controlvm_respond(&p->pending_msg_hdr, response); |
963 | p->pending_msg_hdr.id = CONTROLVM_INVALID; | |
12e364b9 | 964 | if (need_clear) { |
9b989a98 | 965 | bus_info_clear(p); |
28723521 | 966 | busdevices_del(&dev_info_list, bus_no); |
12e364b9 KC |
967 | } |
968 | } | |
969 | ||
970 | static void | |
fbb31f48 | 971 | device_changestate_responder(enum controlvm_id cmd_id, |
52063eca | 972 | u32 bus_no, u32 dev_no, int response, |
fbb31f48 | 973 | struct spar_segment_state response_state) |
12e364b9 | 974 | { |
e82ba62e | 975 | struct visorchipset_device_info *p; |
3ab47701 | 976 | struct controlvm_message outmsg; |
12e364b9 | 977 | |
d480f6a2 | 978 | p = device_find(&dev_info_list, bus_no, dev_no); |
0aca7844 | 979 | if (!p) |
12e364b9 | 980 | return; |
0aca7844 | 981 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 982 | return; /* no controlvm response needed */ |
fbb31f48 | 983 | if (p->pending_msg_hdr.id != cmd_id) |
12e364b9 | 984 | return; |
12e364b9 | 985 | |
246e0cd0 | 986 | controlvm_init_response(&outmsg, &p->pending_msg_hdr, response); |
12e364b9 | 987 | |
fbb31f48 BR |
988 | outmsg.cmd.device_change_state.bus_no = bus_no; |
989 | outmsg.cmd.device_change_state.dev_no = dev_no; | |
990 | outmsg.cmd.device_change_state.state = response_state; | |
12e364b9 | 991 | |
c3d9a224 | 992 | if (!visorchannel_signalinsert(controlvm_channel, |
0aca7844 | 993 | CONTROLVM_QUEUE_REQUEST, &outmsg)) |
12e364b9 | 994 | return; |
12e364b9 | 995 | |
246e0cd0 | 996 | p->pending_msg_hdr.id = CONTROLVM_INVALID; |
12e364b9 KC |
997 | } |
998 | ||
999 | static void | |
52063eca | 1000 | device_responder(enum controlvm_id cmd_id, u32 bus_no, u32 dev_no, int response) |
12e364b9 | 1001 | { |
e82ba62e | 1002 | struct visorchipset_device_info *p; |
f4c11551 | 1003 | bool need_clear = false; |
12e364b9 | 1004 | |
d480f6a2 | 1005 | p = device_find(&dev_info_list, bus_no, dev_no); |
0aca7844 | 1006 | if (!p) |
12e364b9 | 1007 | return; |
12e364b9 | 1008 | if (response >= 0) { |
fbb31f48 | 1009 | if (cmd_id == CONTROLVM_DEVICE_CREATE) |
12e364b9 | 1010 | p->state.created = 1; |
fbb31f48 | 1011 | if (cmd_id == CONTROLVM_DEVICE_DESTROY) |
f4c11551 | 1012 | need_clear = true; |
12e364b9 KC |
1013 | } |
1014 | ||
0aca7844 | 1015 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 1016 | return; /* no controlvm response needed */ |
0aca7844 | 1017 | |
6b59b31d | 1018 | if (p->pending_msg_hdr.id != (u32)cmd_id) |
12e364b9 | 1019 | return; |
0aca7844 | 1020 | |
246e0cd0 BR |
1021 | controlvm_respond(&p->pending_msg_hdr, response); |
1022 | p->pending_msg_hdr.id = CONTROLVM_INVALID; | |
12e364b9 | 1023 | if (need_clear) |
9b989a98 | 1024 | dev_info_clear(p); |
12e364b9 KC |
1025 | } |
1026 | ||
1027 | static void | |
2836c6a8 BR |
1028 | bus_epilog(u32 bus_no, |
1029 | u32 cmd, struct controlvm_message_header *msg_hdr, | |
f4c11551 | 1030 | int response, bool need_response) |
12e364b9 | 1031 | { |
4f66520b | 1032 | struct visorchipset_bus_info *bus_info; |
f4c11551 | 1033 | bool notified = false; |
12e364b9 | 1034 | |
4f66520b | 1035 | bus_info = bus_find(&bus_info_list, bus_no); |
12e364b9 | 1036 | |
2836c6a8 | 1037 | if (!bus_info) |
12e364b9 | 1038 | return; |
0aca7844 | 1039 | |
2836c6a8 BR |
1040 | if (need_response) { |
1041 | memcpy(&bus_info->pending_msg_hdr, msg_hdr, | |
98d7b594 | 1042 | sizeof(struct controlvm_message_header)); |
75c1f8b7 | 1043 | } else { |
2836c6a8 | 1044 | bus_info->pending_msg_hdr.id = CONTROLVM_INVALID; |
75c1f8b7 | 1045 | } |
12e364b9 | 1046 | |
8f1947ac | 1047 | down(¬ifier_lock); |
12e364b9 KC |
1048 | if (response == CONTROLVM_RESP_SUCCESS) { |
1049 | switch (cmd) { | |
1050 | case CONTROLVM_BUS_CREATE: | |
4da3336c DK |
1051 | if (busdev_notifiers.bus_create) { |
1052 | (*busdev_notifiers.bus_create) (bus_no); | |
f4c11551 | 1053 | notified = true; |
12e364b9 KC |
1054 | } |
1055 | break; | |
1056 | case CONTROLVM_BUS_DESTROY: | |
4da3336c DK |
1057 | if (busdev_notifiers.bus_destroy) { |
1058 | (*busdev_notifiers.bus_destroy) (bus_no); | |
f4c11551 | 1059 | notified = true; |
12e364b9 KC |
1060 | } |
1061 | break; | |
1062 | } | |
1063 | } | |
1064 | if (notified) | |
1065 | /* The callback function just called above is responsible | |
929aa8ae | 1066 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1067 | * function, which will call bus_responder() |
1068 | */ | |
1069 | ; | |
1070 | else | |
2836c6a8 | 1071 | bus_responder(cmd, bus_no, response); |
8f1947ac | 1072 | up(¬ifier_lock); |
12e364b9 KC |
1073 | } |
1074 | ||
1075 | static void | |
2836c6a8 BR |
1076 | device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd, |
1077 | struct controlvm_message_header *msg_hdr, int response, | |
f4c11551 | 1078 | bool need_response, bool for_visorbus) |
12e364b9 | 1079 | { |
e82ba62e | 1080 | struct visorchipset_busdev_notifiers *notifiers; |
f4c11551 | 1081 | bool notified = false; |
12e364b9 | 1082 | |
2836c6a8 | 1083 | struct visorchipset_device_info *dev_info = |
d480f6a2 | 1084 | device_find(&dev_info_list, bus_no, dev_no); |
12e364b9 KC |
1085 | char *envp[] = { |
1086 | "SPARSP_DIAGPOOL_PAUSED_STATE = 1", | |
1087 | NULL | |
1088 | }; | |
1089 | ||
2836c6a8 | 1090 | if (!dev_info) |
12e364b9 | 1091 | return; |
0aca7844 | 1092 | |
4da3336c DK |
1093 | notifiers = &busdev_notifiers; |
1094 | ||
2836c6a8 BR |
1095 | if (need_response) { |
1096 | memcpy(&dev_info->pending_msg_hdr, msg_hdr, | |
98d7b594 | 1097 | sizeof(struct controlvm_message_header)); |
75c1f8b7 | 1098 | } else { |
2836c6a8 | 1099 | dev_info->pending_msg_hdr.id = CONTROLVM_INVALID; |
75c1f8b7 | 1100 | } |
12e364b9 | 1101 | |
8f1947ac | 1102 | down(¬ifier_lock); |
12e364b9 KC |
1103 | if (response >= 0) { |
1104 | switch (cmd) { | |
1105 | case CONTROLVM_DEVICE_CREATE: | |
1106 | if (notifiers->device_create) { | |
2836c6a8 | 1107 | (*notifiers->device_create) (bus_no, dev_no); |
f4c11551 | 1108 | notified = true; |
12e364b9 KC |
1109 | } |
1110 | break; | |
1111 | case CONTROLVM_DEVICE_CHANGESTATE: | |
1112 | /* ServerReady / ServerRunning / SegmentStateRunning */ | |
bd0d2dcc BR |
1113 | if (state.alive == segment_state_running.alive && |
1114 | state.operating == | |
1115 | segment_state_running.operating) { | |
12e364b9 | 1116 | if (notifiers->device_resume) { |
2836c6a8 BR |
1117 | (*notifiers->device_resume) (bus_no, |
1118 | dev_no); | |
f4c11551 | 1119 | notified = true; |
12e364b9 KC |
1120 | } |
1121 | } | |
1122 | /* ServerNotReady / ServerLost / SegmentStateStandby */ | |
bd0d2dcc | 1123 | else if (state.alive == segment_state_standby.alive && |
3f833b54 | 1124 | state.operating == |
bd0d2dcc | 1125 | segment_state_standby.operating) { |
12e364b9 KC |
1126 | /* technically this is standby case |
1127 | * where server is lost | |
1128 | */ | |
1129 | if (notifiers->device_pause) { | |
2836c6a8 BR |
1130 | (*notifiers->device_pause) (bus_no, |
1131 | dev_no); | |
f4c11551 | 1132 | notified = true; |
12e364b9 | 1133 | } |
bd0d2dcc | 1134 | } else if (state.alive == segment_state_paused.alive && |
3f833b54 | 1135 | state.operating == |
bd0d2dcc | 1136 | segment_state_paused.operating) { |
12e364b9 KC |
1137 | /* this is lite pause where channel is |
1138 | * still valid just 'pause' of it | |
1139 | */ | |
2836c6a8 BR |
1140 | if (bus_no == g_diagpool_bus_no && |
1141 | dev_no == g_diagpool_dev_no) { | |
12e364b9 KC |
1142 | /* this will trigger the |
1143 | * diag_shutdown.sh script in | |
1144 | * the visorchipset hotplug */ | |
1145 | kobject_uevent_env | |
eb34e877 | 1146 | (&visorchipset_platform_device.dev. |
12e364b9 KC |
1147 | kobj, KOBJ_ONLINE, envp); |
1148 | } | |
1149 | } | |
1150 | break; | |
1151 | case CONTROLVM_DEVICE_DESTROY: | |
1152 | if (notifiers->device_destroy) { | |
2836c6a8 | 1153 | (*notifiers->device_destroy) (bus_no, dev_no); |
f4c11551 | 1154 | notified = true; |
12e364b9 KC |
1155 | } |
1156 | break; | |
1157 | } | |
1158 | } | |
1159 | if (notified) | |
1160 | /* The callback function just called above is responsible | |
929aa8ae | 1161 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1162 | * function, which will call device_responder() |
1163 | */ | |
1164 | ; | |
1165 | else | |
2836c6a8 | 1166 | device_responder(cmd, bus_no, dev_no, response); |
8f1947ac | 1167 | up(¬ifier_lock); |
12e364b9 KC |
1168 | } |
1169 | ||
1170 | static void | |
3ab47701 | 1171 | bus_create(struct controlvm_message *inmsg) |
12e364b9 | 1172 | { |
2ea5117b | 1173 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1174 | u32 bus_no = cmd->create_bus.bus_no; |
12e364b9 | 1175 | int rc = CONTROLVM_RESP_SUCCESS; |
e82ba62e | 1176 | struct visorchipset_bus_info *bus_info; |
12e364b9 | 1177 | |
4f66520b | 1178 | bus_info = bus_find(&bus_info_list, bus_no); |
6c5fed35 BR |
1179 | if (bus_info && (bus_info->state.created == 1)) { |
1180 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1181 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1182 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
6c5fed35 | 1183 | goto cleanup; |
12e364b9 | 1184 | } |
6c5fed35 BR |
1185 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
1186 | if (!bus_info) { | |
1187 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1188 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1189 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
6c5fed35 | 1190 | goto cleanup; |
12e364b9 KC |
1191 | } |
1192 | ||
6c5fed35 BR |
1193 | INIT_LIST_HEAD(&bus_info->entry); |
1194 | bus_info->bus_no = bus_no; | |
12e364b9 | 1195 | |
6c5fed35 | 1196 | POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1197 | |
98d7b594 | 1198 | if (inmsg->hdr.flags.test_message == 1) |
6c5fed35 | 1199 | bus_info->chan_info.addr_type = ADDRTYPE_LOCALTEST; |
12e364b9 | 1200 | else |
6c5fed35 | 1201 | bus_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL; |
12e364b9 | 1202 | |
6c5fed35 BR |
1203 | bus_info->flags.server = inmsg->hdr.flags.server; |
1204 | bus_info->chan_info.channel_addr = cmd->create_bus.channel_addr; | |
1205 | bus_info->chan_info.n_channel_bytes = cmd->create_bus.channel_bytes; | |
1206 | bus_info->chan_info.channel_type_uuid = | |
9b1caee7 | 1207 | cmd->create_bus.bus_data_type_uuid; |
6c5fed35 | 1208 | bus_info->chan_info.channel_inst_uuid = cmd->create_bus.bus_inst_uuid; |
12e364b9 | 1209 | |
6c5fed35 | 1210 | list_add(&bus_info->entry, &bus_info_list); |
12e364b9 | 1211 | |
6c5fed35 | 1212 | POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1213 | |
6c5fed35 BR |
1214 | cleanup: |
1215 | bus_epilog(bus_no, CONTROLVM_BUS_CREATE, &inmsg->hdr, | |
98d7b594 | 1216 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1217 | } |
1218 | ||
1219 | static void | |
3ab47701 | 1220 | bus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1221 | { |
2ea5117b | 1222 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1223 | u32 bus_no = cmd->destroy_bus.bus_no; |
dff54cd6 | 1224 | struct visorchipset_bus_info *bus_info; |
12e364b9 KC |
1225 | int rc = CONTROLVM_RESP_SUCCESS; |
1226 | ||
4f66520b | 1227 | bus_info = bus_find(&bus_info_list, bus_no); |
dff54cd6 | 1228 | if (!bus_info) |
22ad57ba | 1229 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
dff54cd6 | 1230 | else if (bus_info->state.created == 0) |
22ad57ba | 1231 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1232 | |
dff54cd6 | 1233 | bus_epilog(bus_no, CONTROLVM_BUS_DESTROY, &inmsg->hdr, |
98d7b594 | 1234 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1235 | } |
1236 | ||
1237 | static void | |
317d9614 BR |
1238 | bus_configure(struct controlvm_message *inmsg, |
1239 | struct parser_context *parser_ctx) | |
12e364b9 | 1240 | { |
2ea5117b | 1241 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e JS |
1242 | u32 bus_no; |
1243 | struct visorchipset_bus_info *bus_info; | |
12e364b9 KC |
1244 | int rc = CONTROLVM_RESP_SUCCESS; |
1245 | char s[99]; | |
1246 | ||
654bada0 BR |
1247 | bus_no = cmd->configure_bus.bus_no; |
1248 | POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no, | |
1249 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1250 | |
4f66520b | 1251 | bus_info = bus_find(&bus_info_list, bus_no); |
654bada0 BR |
1252 | if (!bus_info) { |
1253 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1254 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1255 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1256 | } else if (bus_info->state.created == 0) { |
1257 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1258 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1259 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1260 | } else if (bus_info->pending_msg_hdr.id != CONTROLVM_INVALID) { |
1261 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1262 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1263 | rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; |
654bada0 BR |
1264 | } else { |
1265 | bus_info->partition_handle = cmd->configure_bus.guest_handle; | |
1266 | bus_info->partition_uuid = parser_id_get(parser_ctx); | |
1267 | parser_param_start(parser_ctx, PARSERSTRING_NAME); | |
1268 | bus_info->name = parser_string_get(parser_ctx); | |
1269 | ||
1270 | visorchannel_uuid_id(&bus_info->partition_uuid, s); | |
1271 | POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no, | |
1272 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1273 | } |
654bada0 | 1274 | bus_epilog(bus_no, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, |
98d7b594 | 1275 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1276 | } |
1277 | ||
1278 | static void | |
3ab47701 | 1279 | my_device_create(struct controlvm_message *inmsg) |
12e364b9 | 1280 | { |
2ea5117b | 1281 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1282 | u32 bus_no = cmd->create_device.bus_no; |
1283 | u32 dev_no = cmd->create_device.dev_no; | |
e82ba62e JS |
1284 | struct visorchipset_device_info *dev_info; |
1285 | struct visorchipset_bus_info *bus_info; | |
12e364b9 KC |
1286 | int rc = CONTROLVM_RESP_SUCCESS; |
1287 | ||
d480f6a2 | 1288 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
c60c8e26 BR |
1289 | if (dev_info && (dev_info->state.created == 1)) { |
1290 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1291 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1292 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
c60c8e26 | 1293 | goto cleanup; |
12e364b9 | 1294 | } |
4f66520b | 1295 | bus_info = bus_find(&bus_info_list, bus_no); |
c60c8e26 BR |
1296 | if (!bus_info) { |
1297 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1298 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1299 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1300 | goto cleanup; |
12e364b9 | 1301 | } |
c60c8e26 BR |
1302 | if (bus_info->state.created == 0) { |
1303 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1304 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1305 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1306 | goto cleanup; |
12e364b9 | 1307 | } |
c60c8e26 BR |
1308 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
1309 | if (!dev_info) { | |
1310 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1311 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1312 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
c60c8e26 | 1313 | goto cleanup; |
12e364b9 | 1314 | } |
97a84f12 | 1315 | |
c60c8e26 BR |
1316 | INIT_LIST_HEAD(&dev_info->entry); |
1317 | dev_info->bus_no = bus_no; | |
1318 | dev_info->dev_no = dev_no; | |
1319 | dev_info->dev_inst_uuid = cmd->create_device.dev_inst_uuid; | |
1320 | POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, | |
12e364b9 KC |
1321 | POSTCODE_SEVERITY_INFO); |
1322 | ||
98d7b594 | 1323 | if (inmsg->hdr.flags.test_message == 1) |
c60c8e26 | 1324 | dev_info->chan_info.addr_type = ADDRTYPE_LOCALTEST; |
12e364b9 | 1325 | else |
c60c8e26 BR |
1326 | dev_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL; |
1327 | dev_info->chan_info.channel_addr = cmd->create_device.channel_addr; | |
1328 | dev_info->chan_info.n_channel_bytes = cmd->create_device.channel_bytes; | |
1329 | dev_info->chan_info.channel_type_uuid = | |
9b1caee7 | 1330 | cmd->create_device.data_type_uuid; |
c60c8e26 BR |
1331 | dev_info->chan_info.intr = cmd->create_device.intr; |
1332 | list_add(&dev_info->entry, &dev_info_list); | |
1333 | POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no, | |
12e364b9 | 1334 | POSTCODE_SEVERITY_INFO); |
c60c8e26 | 1335 | cleanup: |
12e364b9 | 1336 | /* get the bus and devNo for DiagPool channel */ |
c60c8e26 BR |
1337 | if (dev_info && |
1338 | is_diagpool_channel(dev_info->chan_info.channel_type_uuid)) { | |
1339 | g_diagpool_bus_no = bus_no; | |
1340 | g_diagpool_dev_no = dev_no; | |
12e364b9 | 1341 | } |
c60c8e26 | 1342 | device_epilog(bus_no, dev_no, segment_state_running, |
12e364b9 | 1343 | CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, |
4da3336c | 1344 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1345 | } |
1346 | ||
1347 | static void | |
3ab47701 | 1348 | my_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 1349 | { |
2ea5117b | 1350 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1351 | u32 bus_no = cmd->device_change_state.bus_no; |
1352 | u32 dev_no = cmd->device_change_state.dev_no; | |
2ea5117b | 1353 | struct spar_segment_state state = cmd->device_change_state.state; |
e82ba62e | 1354 | struct visorchipset_device_info *dev_info; |
12e364b9 KC |
1355 | int rc = CONTROLVM_RESP_SUCCESS; |
1356 | ||
d480f6a2 | 1357 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
0278a905 BR |
1358 | if (!dev_info) { |
1359 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1360 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1361 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
0278a905 BR |
1362 | } else if (dev_info->state.created == 0) { |
1363 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1364 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1365 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
12e364b9 | 1366 | } |
0278a905 BR |
1367 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
1368 | device_epilog(bus_no, dev_no, state, | |
1369 | CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, | |
4da3336c | 1370 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1371 | } |
1372 | ||
1373 | static void | |
3ab47701 | 1374 | my_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1375 | { |
2ea5117b | 1376 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1377 | u32 bus_no = cmd->destroy_device.bus_no; |
1378 | u32 dev_no = cmd->destroy_device.dev_no; | |
e82ba62e | 1379 | struct visorchipset_device_info *dev_info; |
12e364b9 KC |
1380 | int rc = CONTROLVM_RESP_SUCCESS; |
1381 | ||
d480f6a2 | 1382 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
61715c8b | 1383 | if (!dev_info) |
22ad57ba | 1384 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
61715c8b | 1385 | else if (dev_info->state.created == 0) |
22ad57ba | 1386 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1387 | |
61715c8b BR |
1388 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
1389 | device_epilog(bus_no, dev_no, segment_state_running, | |
12e364b9 | 1390 | CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, |
4da3336c | 1391 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1392 | } |
1393 | ||
1394 | /* When provided with the physical address of the controlvm channel | |
1395 | * (phys_addr), the offset to the payload area we need to manage | |
1396 | * (offset), and the size of this payload area (bytes), fills in the | |
f4c11551 | 1397 | * controlvm_payload_info struct. Returns true for success or false |
12e364b9 KC |
1398 | * for failure. |
1399 | */ | |
1400 | static int | |
d5b3f1dc | 1401 | initialize_controlvm_payload_info(u64 phys_addr, u64 offset, u32 bytes, |
c1f834eb | 1402 | struct visor_controlvm_payload_info *info) |
12e364b9 | 1403 | { |
c242233e | 1404 | u8 __iomem *payload = NULL; |
12e364b9 KC |
1405 | int rc = CONTROLVM_RESP_SUCCESS; |
1406 | ||
38f736e9 | 1407 | if (!info) { |
22ad57ba | 1408 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1409 | goto cleanup; |
12e364b9 | 1410 | } |
c1f834eb | 1411 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 | 1412 | if ((offset == 0) || (bytes == 0)) { |
22ad57ba | 1413 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1414 | goto cleanup; |
12e364b9 KC |
1415 | } |
1416 | payload = ioremap_cache(phys_addr + offset, bytes); | |
38f736e9 | 1417 | if (!payload) { |
22ad57ba | 1418 | rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; |
f118a39b | 1419 | goto cleanup; |
12e364b9 KC |
1420 | } |
1421 | ||
1422 | info->offset = offset; | |
1423 | info->bytes = bytes; | |
1424 | info->ptr = payload; | |
12e364b9 | 1425 | |
f118a39b | 1426 | cleanup: |
12e364b9 | 1427 | if (rc < 0) { |
f118a39b | 1428 | if (payload) { |
12e364b9 KC |
1429 | iounmap(payload); |
1430 | payload = NULL; | |
1431 | } | |
1432 | } | |
1433 | return rc; | |
1434 | } | |
1435 | ||
1436 | static void | |
c1f834eb | 1437 | destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info) |
12e364b9 | 1438 | { |
597c338f | 1439 | if (info->ptr) { |
12e364b9 KC |
1440 | iounmap(info->ptr); |
1441 | info->ptr = NULL; | |
1442 | } | |
c1f834eb | 1443 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 KC |
1444 | } |
1445 | ||
1446 | static void | |
1447 | initialize_controlvm_payload(void) | |
1448 | { | |
d5b3f1dc | 1449 | u64 phys_addr = visorchannel_get_physaddr(controlvm_channel); |
cafefc0c BR |
1450 | u64 payload_offset = 0; |
1451 | u32 payload_bytes = 0; | |
26eb2c0c | 1452 | |
c3d9a224 | 1453 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1454 | offsetof(struct spar_controlvm_channel_protocol, |
1455 | request_payload_offset), | |
cafefc0c | 1456 | &payload_offset, sizeof(payload_offset)) < 0) { |
12e364b9 KC |
1457 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1458 | POSTCODE_SEVERITY_ERR); | |
1459 | return; | |
1460 | } | |
c3d9a224 | 1461 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1462 | offsetof(struct spar_controlvm_channel_protocol, |
1463 | request_payload_bytes), | |
cafefc0c | 1464 | &payload_bytes, sizeof(payload_bytes)) < 0) { |
12e364b9 KC |
1465 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1466 | POSTCODE_SEVERITY_ERR); | |
1467 | return; | |
1468 | } | |
1469 | initialize_controlvm_payload_info(phys_addr, | |
cafefc0c | 1470 | payload_offset, payload_bytes, |
84982fbf | 1471 | &controlvm_payload_info); |
12e364b9 KC |
1472 | } |
1473 | ||
1474 | /* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1475 | * Returns CONTROLVM_RESP_xxx code. | |
1476 | */ | |
1477 | int | |
1478 | visorchipset_chipset_ready(void) | |
1479 | { | |
eb34e877 | 1480 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); |
12e364b9 KC |
1481 | return CONTROLVM_RESP_SUCCESS; |
1482 | } | |
1483 | EXPORT_SYMBOL_GPL(visorchipset_chipset_ready); | |
1484 | ||
1485 | int | |
1486 | visorchipset_chipset_selftest(void) | |
1487 | { | |
1488 | char env_selftest[20]; | |
1489 | char *envp[] = { env_selftest, NULL }; | |
26eb2c0c | 1490 | |
12e364b9 | 1491 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); |
eb34e877 | 1492 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1493 | envp); |
1494 | return CONTROLVM_RESP_SUCCESS; | |
1495 | } | |
1496 | EXPORT_SYMBOL_GPL(visorchipset_chipset_selftest); | |
1497 | ||
1498 | /* Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1499 | * Returns CONTROLVM_RESP_xxx code. | |
1500 | */ | |
1501 | int | |
1502 | visorchipset_chipset_notready(void) | |
1503 | { | |
eb34e877 | 1504 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); |
12e364b9 KC |
1505 | return CONTROLVM_RESP_SUCCESS; |
1506 | } | |
1507 | EXPORT_SYMBOL_GPL(visorchipset_chipset_notready); | |
1508 | ||
1509 | static void | |
77a0449d | 1510 | chipset_ready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1511 | { |
1512 | int rc = visorchipset_chipset_ready(); | |
26eb2c0c | 1513 | |
12e364b9 KC |
1514 | if (rc != CONTROLVM_RESP_SUCCESS) |
1515 | rc = -rc; | |
77a0449d BR |
1516 | if (msg_hdr->flags.response_expected && !visorchipset_holdchipsetready) |
1517 | controlvm_respond(msg_hdr, rc); | |
1518 | if (msg_hdr->flags.response_expected && visorchipset_holdchipsetready) { | |
12e364b9 KC |
1519 | /* Send CHIPSET_READY response when all modules have been loaded |
1520 | * and disks mounted for the partition | |
1521 | */ | |
77a0449d | 1522 | g_chipset_msg_hdr = *msg_hdr; |
12e364b9 KC |
1523 | } |
1524 | } | |
1525 | ||
1526 | static void | |
77a0449d | 1527 | chipset_selftest(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1528 | { |
1529 | int rc = visorchipset_chipset_selftest(); | |
26eb2c0c | 1530 | |
12e364b9 KC |
1531 | if (rc != CONTROLVM_RESP_SUCCESS) |
1532 | rc = -rc; | |
77a0449d BR |
1533 | if (msg_hdr->flags.response_expected) |
1534 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1535 | } |
1536 | ||
1537 | static void | |
77a0449d | 1538 | chipset_notready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1539 | { |
1540 | int rc = visorchipset_chipset_notready(); | |
26eb2c0c | 1541 | |
12e364b9 KC |
1542 | if (rc != CONTROLVM_RESP_SUCCESS) |
1543 | rc = -rc; | |
77a0449d BR |
1544 | if (msg_hdr->flags.response_expected) |
1545 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1546 | } |
1547 | ||
1548 | /* This is your "one-stop" shop for grabbing the next message from the | |
1549 | * CONTROLVM_QUEUE_EVENT queue in the controlvm channel. | |
1550 | */ | |
f4c11551 | 1551 | static bool |
3ab47701 | 1552 | read_controlvm_event(struct controlvm_message *msg) |
12e364b9 | 1553 | { |
c3d9a224 | 1554 | if (visorchannel_signalremove(controlvm_channel, |
12e364b9 KC |
1555 | CONTROLVM_QUEUE_EVENT, msg)) { |
1556 | /* got a message */ | |
0aca7844 | 1557 | if (msg->hdr.flags.test_message == 1) |
f4c11551 JS |
1558 | return false; |
1559 | return true; | |
12e364b9 | 1560 | } |
f4c11551 | 1561 | return false; |
12e364b9 KC |
1562 | } |
1563 | ||
1564 | /* | |
1565 | * The general parahotplug flow works as follows. The visorchipset | |
1566 | * driver receives a DEVICE_CHANGESTATE message from Command | |
1567 | * specifying a physical device to enable or disable. The CONTROLVM | |
1568 | * message handler calls parahotplug_process_message, which then adds | |
1569 | * the message to a global list and kicks off a udev event which | |
1570 | * causes a user level script to enable or disable the specified | |
1571 | * device. The udev script then writes to | |
1572 | * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write | |
1573 | * to get called, at which point the appropriate CONTROLVM message is | |
1574 | * retrieved from the list and responded to. | |
1575 | */ | |
1576 | ||
1577 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
1578 | ||
1579 | /* | |
1580 | * Generate unique int to match an outstanding CONTROLVM message with a | |
1581 | * udev script /proc response | |
1582 | */ | |
1583 | static int | |
1584 | parahotplug_next_id(void) | |
1585 | { | |
1586 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 1587 | |
12e364b9 KC |
1588 | return atomic_inc_return(&id); |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * Returns the time (in jiffies) when a CONTROLVM message on the list | |
1593 | * should expire -- PARAHOTPLUG_TIMEOUT_MS in the future | |
1594 | */ | |
1595 | static unsigned long | |
1596 | parahotplug_next_expiration(void) | |
1597 | { | |
2cc1a1b3 | 1598 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
1599 | } |
1600 | ||
1601 | /* | |
1602 | * Create a parahotplug_request, which is basically a wrapper for a | |
1603 | * CONTROLVM_MESSAGE that we can stick on a list | |
1604 | */ | |
1605 | static struct parahotplug_request * | |
3ab47701 | 1606 | parahotplug_request_create(struct controlvm_message *msg) |
12e364b9 | 1607 | { |
ea0dcfcf QL |
1608 | struct parahotplug_request *req; |
1609 | ||
6a55e3c3 | 1610 | req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY); |
38f736e9 | 1611 | if (!req) |
12e364b9 KC |
1612 | return NULL; |
1613 | ||
1614 | req->id = parahotplug_next_id(); | |
1615 | req->expiration = parahotplug_next_expiration(); | |
1616 | req->msg = *msg; | |
1617 | ||
1618 | return req; | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * Free a parahotplug_request. | |
1623 | */ | |
1624 | static void | |
1625 | parahotplug_request_destroy(struct parahotplug_request *req) | |
1626 | { | |
1627 | kfree(req); | |
1628 | } | |
1629 | ||
1630 | /* | |
1631 | * Cause uevent to run the user level script to do the disable/enable | |
1632 | * specified in (the CONTROLVM message in) the specified | |
1633 | * parahotplug_request | |
1634 | */ | |
1635 | static void | |
1636 | parahotplug_request_kickoff(struct parahotplug_request *req) | |
1637 | { | |
2ea5117b | 1638 | struct controlvm_message_packet *cmd = &req->msg.cmd; |
12e364b9 KC |
1639 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], |
1640 | env_func[40]; | |
1641 | char *envp[] = { | |
1642 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1643 | }; | |
1644 | ||
1645 | sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); | |
1646 | sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); | |
1647 | sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", | |
2ea5117b | 1648 | cmd->device_change_state.state.active); |
12e364b9 | 1649 | sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", |
2ea5117b | 1650 | cmd->device_change_state.bus_no); |
12e364b9 | 1651 | sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", |
2ea5117b | 1652 | cmd->device_change_state.dev_no >> 3); |
12e364b9 | 1653 | sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", |
2ea5117b | 1654 | cmd->device_change_state.dev_no & 0x7); |
12e364b9 | 1655 | |
eb34e877 | 1656 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1657 | envp); |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | * Remove any request from the list that's been on there too long and | |
1662 | * respond with an error. | |
1663 | */ | |
1664 | static void | |
1665 | parahotplug_process_list(void) | |
1666 | { | |
e82ba62e JS |
1667 | struct list_head *pos; |
1668 | struct list_head *tmp; | |
12e364b9 | 1669 | |
ddf5de53 | 1670 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 | 1671 | |
ddf5de53 | 1672 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1673 | struct parahotplug_request *req = |
1674 | list_entry(pos, struct parahotplug_request, list); | |
55b33413 BR |
1675 | |
1676 | if (!time_after_eq(jiffies, req->expiration)) | |
1677 | continue; | |
1678 | ||
1679 | list_del(pos); | |
1680 | if (req->msg.hdr.flags.response_expected) | |
1681 | controlvm_respond_physdev_changestate( | |
1682 | &req->msg.hdr, | |
1683 | CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, | |
1684 | req->msg.cmd.device_change_state.state); | |
1685 | parahotplug_request_destroy(req); | |
12e364b9 KC |
1686 | } |
1687 | ||
ddf5de53 | 1688 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1689 | } |
1690 | ||
1691 | /* | |
1692 | * Called from the /proc handler, which means the user script has | |
1693 | * finished the enable/disable. Find the matching identifier, and | |
1694 | * respond to the CONTROLVM message with success. | |
1695 | */ | |
1696 | static int | |
b06bdf7d | 1697 | parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1698 | { |
e82ba62e JS |
1699 | struct list_head *pos; |
1700 | struct list_head *tmp; | |
12e364b9 | 1701 | |
ddf5de53 | 1702 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1703 | |
1704 | /* Look for a request matching "id". */ | |
ddf5de53 | 1705 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1706 | struct parahotplug_request *req = |
1707 | list_entry(pos, struct parahotplug_request, list); | |
1708 | if (req->id == id) { | |
1709 | /* Found a match. Remove it from the list and | |
1710 | * respond. | |
1711 | */ | |
1712 | list_del(pos); | |
ddf5de53 | 1713 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1714 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1715 | if (req->msg.hdr.flags.response_expected) |
12e364b9 KC |
1716 | controlvm_respond_physdev_changestate( |
1717 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
2ea5117b | 1718 | req->msg.cmd.device_change_state.state); |
12e364b9 KC |
1719 | parahotplug_request_destroy(req); |
1720 | return 0; | |
1721 | } | |
1722 | } | |
1723 | ||
ddf5de53 | 1724 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1725 | return -1; |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * Enables or disables a PCI device by kicking off a udev script | |
1730 | */ | |
bd5b9b32 | 1731 | static void |
3ab47701 | 1732 | parahotplug_process_message(struct controlvm_message *inmsg) |
12e364b9 KC |
1733 | { |
1734 | struct parahotplug_request *req; | |
1735 | ||
1736 | req = parahotplug_request_create(inmsg); | |
1737 | ||
38f736e9 | 1738 | if (!req) |
12e364b9 | 1739 | return; |
12e364b9 | 1740 | |
2ea5117b | 1741 | if (inmsg->cmd.device_change_state.state.active) { |
12e364b9 KC |
1742 | /* For enable messages, just respond with success |
1743 | * right away. This is a bit of a hack, but there are | |
1744 | * issues with the early enable messages we get (with | |
1745 | * either the udev script not detecting that the device | |
1746 | * is up, or not getting called at all). Fortunately | |
1747 | * the messages that get lost don't matter anyway, as | |
1748 | * devices are automatically enabled at | |
1749 | * initialization. | |
1750 | */ | |
1751 | parahotplug_request_kickoff(req); | |
1752 | controlvm_respond_physdev_changestate(&inmsg->hdr, | |
8e76e695 BR |
1753 | CONTROLVM_RESP_SUCCESS, |
1754 | inmsg->cmd.device_change_state.state); | |
12e364b9 KC |
1755 | parahotplug_request_destroy(req); |
1756 | } else { | |
1757 | /* For disable messages, add the request to the | |
1758 | * request list before kicking off the udev script. It | |
1759 | * won't get responded to until the script has | |
1760 | * indicated it's done. | |
1761 | */ | |
ddf5de53 BR |
1762 | spin_lock(¶hotplug_request_list_lock); |
1763 | list_add_tail(&req->list, ¶hotplug_request_list); | |
1764 | spin_unlock(¶hotplug_request_list_lock); | |
12e364b9 KC |
1765 | |
1766 | parahotplug_request_kickoff(req); | |
1767 | } | |
1768 | } | |
1769 | ||
12e364b9 KC |
1770 | /* Process a controlvm message. |
1771 | * Return result: | |
779d0752 | 1772 | * false - this function will return false only in the case where the |
12e364b9 KC |
1773 | * controlvm message was NOT processed, but processing must be |
1774 | * retried before reading the next controlvm message; a | |
1775 | * scenario where this can occur is when we need to throttle | |
1776 | * the allocation of memory in which to copy out controlvm | |
1777 | * payload data | |
f4c11551 | 1778 | * true - processing of the controlvm message completed, |
12e364b9 KC |
1779 | * either successfully or with an error. |
1780 | */ | |
f4c11551 | 1781 | static bool |
d5b3f1dc | 1782 | handle_command(struct controlvm_message inmsg, u64 channel_addr) |
12e364b9 | 1783 | { |
2ea5117b | 1784 | struct controlvm_message_packet *cmd = &inmsg.cmd; |
e82ba62e JS |
1785 | u64 parm_addr; |
1786 | u32 parm_bytes; | |
317d9614 | 1787 | struct parser_context *parser_ctx = NULL; |
e82ba62e | 1788 | bool local_addr; |
3ab47701 | 1789 | struct controlvm_message ackmsg; |
12e364b9 KC |
1790 | |
1791 | /* create parsing context if necessary */ | |
818352a8 | 1792 | local_addr = (inmsg.hdr.flags.test_message == 1); |
0aca7844 | 1793 | if (channel_addr == 0) |
f4c11551 | 1794 | return true; |
818352a8 BR |
1795 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; |
1796 | parm_bytes = inmsg.hdr.payload_bytes; | |
12e364b9 KC |
1797 | |
1798 | /* Parameter and channel addresses within test messages actually lie | |
1799 | * within our OS-controlled memory. We need to know that, because it | |
1800 | * makes a difference in how we compute the virtual address. | |
1801 | */ | |
ebec8967 | 1802 | if (parm_addr && parm_bytes) { |
f4c11551 | 1803 | bool retry = false; |
26eb2c0c | 1804 | |
12e364b9 | 1805 | parser_ctx = |
818352a8 BR |
1806 | parser_init_byte_stream(parm_addr, parm_bytes, |
1807 | local_addr, &retry); | |
1b08872e | 1808 | if (!parser_ctx && retry) |
f4c11551 | 1809 | return false; |
12e364b9 KC |
1810 | } |
1811 | ||
818352a8 | 1812 | if (!local_addr) { |
12e364b9 KC |
1813 | controlvm_init_response(&ackmsg, &inmsg.hdr, |
1814 | CONTROLVM_RESP_SUCCESS); | |
c3d9a224 BR |
1815 | if (controlvm_channel) |
1816 | visorchannel_signalinsert(controlvm_channel, | |
1b08872e BR |
1817 | CONTROLVM_QUEUE_ACK, |
1818 | &ackmsg); | |
12e364b9 | 1819 | } |
98d7b594 | 1820 | switch (inmsg.hdr.id) { |
12e364b9 | 1821 | case CONTROLVM_CHIPSET_INIT: |
12e364b9 KC |
1822 | chipset_init(&inmsg); |
1823 | break; | |
1824 | case CONTROLVM_BUS_CREATE: | |
12e364b9 KC |
1825 | bus_create(&inmsg); |
1826 | break; | |
1827 | case CONTROLVM_BUS_DESTROY: | |
12e364b9 KC |
1828 | bus_destroy(&inmsg); |
1829 | break; | |
1830 | case CONTROLVM_BUS_CONFIGURE: | |
12e364b9 KC |
1831 | bus_configure(&inmsg, parser_ctx); |
1832 | break; | |
1833 | case CONTROLVM_DEVICE_CREATE: | |
12e364b9 KC |
1834 | my_device_create(&inmsg); |
1835 | break; | |
1836 | case CONTROLVM_DEVICE_CHANGESTATE: | |
2ea5117b | 1837 | if (cmd->device_change_state.flags.phys_device) { |
12e364b9 KC |
1838 | parahotplug_process_message(&inmsg); |
1839 | } else { | |
12e364b9 KC |
1840 | /* save the hdr and cmd structures for later use */ |
1841 | /* when sending back the response to Command */ | |
1842 | my_device_changestate(&inmsg); | |
4f44b72d | 1843 | g_devicechangestate_packet = inmsg.cmd; |
12e364b9 KC |
1844 | break; |
1845 | } | |
1846 | break; | |
1847 | case CONTROLVM_DEVICE_DESTROY: | |
12e364b9 KC |
1848 | my_device_destroy(&inmsg); |
1849 | break; | |
1850 | case CONTROLVM_DEVICE_CONFIGURE: | |
12e364b9 | 1851 | /* no op for now, just send a respond that we passed */ |
98d7b594 | 1852 | if (inmsg.hdr.flags.response_expected) |
12e364b9 KC |
1853 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); |
1854 | break; | |
1855 | case CONTROLVM_CHIPSET_READY: | |
12e364b9 KC |
1856 | chipset_ready(&inmsg.hdr); |
1857 | break; | |
1858 | case CONTROLVM_CHIPSET_SELFTEST: | |
12e364b9 KC |
1859 | chipset_selftest(&inmsg.hdr); |
1860 | break; | |
1861 | case CONTROLVM_CHIPSET_STOP: | |
12e364b9 KC |
1862 | chipset_notready(&inmsg.hdr); |
1863 | break; | |
1864 | default: | |
98d7b594 | 1865 | if (inmsg.hdr.flags.response_expected) |
12e364b9 | 1866 | controlvm_respond(&inmsg.hdr, |
818352a8 | 1867 | -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); |
12e364b9 KC |
1868 | break; |
1869 | } | |
1870 | ||
38f736e9 | 1871 | if (parser_ctx) { |
12e364b9 KC |
1872 | parser_done(parser_ctx); |
1873 | parser_ctx = NULL; | |
1874 | } | |
f4c11551 | 1875 | return true; |
12e364b9 KC |
1876 | } |
1877 | ||
d5b3f1dc | 1878 | static u64 controlvm_get_channel_address(void) |
524b0b63 | 1879 | { |
5fc0229a | 1880 | u64 addr = 0; |
b3c55b13 | 1881 | u32 size = 0; |
524b0b63 | 1882 | |
0aca7844 | 1883 | if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) |
524b0b63 | 1884 | return 0; |
0aca7844 | 1885 | |
524b0b63 BR |
1886 | return addr; |
1887 | } | |
1888 | ||
12e364b9 KC |
1889 | static void |
1890 | controlvm_periodic_work(struct work_struct *work) | |
1891 | { | |
3ab47701 | 1892 | struct controlvm_message inmsg; |
f4c11551 JS |
1893 | bool got_command = false; |
1894 | bool handle_command_failed = false; | |
1c1ed292 | 1895 | static u64 poll_count; |
12e364b9 KC |
1896 | |
1897 | /* make sure visorbus server is registered for controlvm callbacks */ | |
4da3336c | 1898 | if (visorchipset_visorbusregwait && !visorbusregistered) |
1c1ed292 | 1899 | goto cleanup; |
12e364b9 | 1900 | |
1c1ed292 BR |
1901 | poll_count++; |
1902 | if (poll_count >= 250) | |
12e364b9 KC |
1903 | ; /* keep going */ |
1904 | else | |
1c1ed292 | 1905 | goto cleanup; |
12e364b9 KC |
1906 | |
1907 | /* Check events to determine if response to CHIPSET_READY | |
1908 | * should be sent | |
1909 | */ | |
0639ba67 BR |
1910 | if (visorchipset_holdchipsetready && |
1911 | (g_chipset_msg_hdr.id != CONTROLVM_INVALID)) { | |
12e364b9 | 1912 | if (check_chipset_events() == 1) { |
da021f02 | 1913 | controlvm_respond(&g_chipset_msg_hdr, 0); |
12e364b9 | 1914 | clear_chipset_events(); |
da021f02 | 1915 | memset(&g_chipset_msg_hdr, 0, |
98d7b594 | 1916 | sizeof(struct controlvm_message_header)); |
12e364b9 KC |
1917 | } |
1918 | } | |
1919 | ||
c3d9a224 | 1920 | while (visorchannel_signalremove(controlvm_channel, |
8a1182eb | 1921 | CONTROLVM_QUEUE_RESPONSE, |
c3d9a224 BR |
1922 | &inmsg)) |
1923 | ; | |
1c1ed292 | 1924 | if (!got_command) { |
7166ed19 | 1925 | if (controlvm_pending_msg_valid) { |
8a1182eb BR |
1926 | /* we throttled processing of a prior |
1927 | * msg, so try to process it again | |
1928 | * rather than reading a new one | |
1929 | */ | |
7166ed19 | 1930 | inmsg = controlvm_pending_msg; |
f4c11551 | 1931 | controlvm_pending_msg_valid = false; |
1c1ed292 | 1932 | got_command = true; |
75c1f8b7 | 1933 | } else { |
1c1ed292 | 1934 | got_command = read_controlvm_event(&inmsg); |
75c1f8b7 | 1935 | } |
8a1182eb | 1936 | } |
12e364b9 | 1937 | |
f4c11551 | 1938 | handle_command_failed = false; |
1c1ed292 | 1939 | while (got_command && (!handle_command_failed)) { |
b53e0e93 | 1940 | most_recent_message_jiffies = jiffies; |
8a1182eb BR |
1941 | if (handle_command(inmsg, |
1942 | visorchannel_get_physaddr | |
c3d9a224 | 1943 | (controlvm_channel))) |
1c1ed292 | 1944 | got_command = read_controlvm_event(&inmsg); |
8a1182eb BR |
1945 | else { |
1946 | /* this is a scenario where throttling | |
1947 | * is required, but probably NOT an | |
1948 | * error...; we stash the current | |
1949 | * controlvm msg so we will attempt to | |
1950 | * reprocess it on our next loop | |
1951 | */ | |
f4c11551 | 1952 | handle_command_failed = true; |
7166ed19 | 1953 | controlvm_pending_msg = inmsg; |
f4c11551 | 1954 | controlvm_pending_msg_valid = true; |
12e364b9 KC |
1955 | } |
1956 | } | |
1957 | ||
1958 | /* parahotplug_worker */ | |
1959 | parahotplug_process_list(); | |
1960 | ||
1c1ed292 | 1961 | cleanup: |
12e364b9 KC |
1962 | |
1963 | if (time_after(jiffies, | |
b53e0e93 | 1964 | most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { |
12e364b9 KC |
1965 | /* it's been longer than MIN_IDLE_SECONDS since we |
1966 | * processed our last controlvm message; slow down the | |
1967 | * polling | |
1968 | */ | |
911e213e BR |
1969 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) |
1970 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
12e364b9 | 1971 | } else { |
911e213e BR |
1972 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) |
1973 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
12e364b9 KC |
1974 | } |
1975 | ||
9232d2d6 BR |
1976 | queue_delayed_work(periodic_controlvm_workqueue, |
1977 | &periodic_controlvm_work, poll_jiffies); | |
12e364b9 KC |
1978 | } |
1979 | ||
1980 | static void | |
1981 | setup_crash_devices_work_queue(struct work_struct *work) | |
1982 | { | |
e6bdb904 BR |
1983 | struct controlvm_message local_crash_bus_msg; |
1984 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 1985 | struct controlvm_message msg; |
e6bdb904 BR |
1986 | u32 local_crash_msg_offset; |
1987 | u16 local_crash_msg_count; | |
12e364b9 | 1988 | |
4da3336c DK |
1989 | /* make sure visorbus is registered for controlvm callbacks */ |
1990 | if (visorchipset_visorbusregwait && !visorbusregistered) | |
e6bdb904 | 1991 | goto cleanup; |
12e364b9 KC |
1992 | |
1993 | POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
1994 | ||
1995 | /* send init chipset msg */ | |
98d7b594 | 1996 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
1997 | msg.cmd.init_chipset.bus_count = 23; |
1998 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
1999 | |
2000 | chipset_init(&msg); | |
2001 | ||
12e364b9 | 2002 | /* get saved message count */ |
c3d9a224 | 2003 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
2004 | offsetof(struct spar_controlvm_channel_protocol, |
2005 | saved_crash_message_count), | |
e6bdb904 | 2006 | &local_crash_msg_count, sizeof(u16)) < 0) { |
12e364b9 KC |
2007 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
2008 | POSTCODE_SEVERITY_ERR); | |
2009 | return; | |
2010 | } | |
2011 | ||
e6bdb904 | 2012 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
12e364b9 | 2013 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
e6bdb904 | 2014 | local_crash_msg_count, |
12e364b9 KC |
2015 | POSTCODE_SEVERITY_ERR); |
2016 | return; | |
2017 | } | |
2018 | ||
2019 | /* get saved crash message offset */ | |
c3d9a224 | 2020 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
2021 | offsetof(struct spar_controlvm_channel_protocol, |
2022 | saved_crash_message_offset), | |
e6bdb904 | 2023 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
12e364b9 KC |
2024 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
2025 | POSTCODE_SEVERITY_ERR); | |
2026 | return; | |
2027 | } | |
2028 | ||
2029 | /* read create device message for storage bus offset */ | |
c3d9a224 | 2030 | if (visorchannel_read(controlvm_channel, |
e6bdb904 BR |
2031 | local_crash_msg_offset, |
2032 | &local_crash_bus_msg, | |
3ab47701 | 2033 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
2034 | POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, |
2035 | POSTCODE_SEVERITY_ERR); | |
2036 | return; | |
2037 | } | |
2038 | ||
2039 | /* read create device message for storage device */ | |
c3d9a224 | 2040 | if (visorchannel_read(controlvm_channel, |
e6bdb904 | 2041 | local_crash_msg_offset + |
3ab47701 | 2042 | sizeof(struct controlvm_message), |
e6bdb904 | 2043 | &local_crash_dev_msg, |
3ab47701 | 2044 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
2045 | POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, |
2046 | POSTCODE_SEVERITY_ERR); | |
2047 | return; | |
2048 | } | |
2049 | ||
2050 | /* reuse IOVM create bus message */ | |
ebec8967 | 2051 | if (local_crash_bus_msg.cmd.create_bus.channel_addr) { |
e6bdb904 | 2052 | bus_create(&local_crash_bus_msg); |
75c1f8b7 | 2053 | } else { |
12e364b9 KC |
2054 | POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, |
2055 | POSTCODE_SEVERITY_ERR); | |
2056 | return; | |
2057 | } | |
2058 | ||
2059 | /* reuse create device message for storage device */ | |
ebec8967 | 2060 | if (local_crash_dev_msg.cmd.create_device.channel_addr) { |
e6bdb904 | 2061 | my_device_create(&local_crash_dev_msg); |
75c1f8b7 | 2062 | } else { |
12e364b9 KC |
2063 | POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, |
2064 | POSTCODE_SEVERITY_ERR); | |
2065 | return; | |
2066 | } | |
12e364b9 KC |
2067 | POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2068 | return; | |
2069 | ||
e6bdb904 | 2070 | cleanup: |
12e364b9 | 2071 | |
911e213e | 2072 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; |
12e364b9 | 2073 | |
9232d2d6 BR |
2074 | queue_delayed_work(periodic_controlvm_workqueue, |
2075 | &periodic_controlvm_work, poll_jiffies); | |
12e364b9 KC |
2076 | } |
2077 | ||
2078 | static void | |
52063eca | 2079 | bus_create_response(u32 bus_no, int response) |
12e364b9 | 2080 | { |
8e3fedd6 | 2081 | bus_responder(CONTROLVM_BUS_CREATE, bus_no, response); |
12e364b9 KC |
2082 | } |
2083 | ||
2084 | static void | |
52063eca | 2085 | bus_destroy_response(u32 bus_no, int response) |
12e364b9 | 2086 | { |
8e3fedd6 | 2087 | bus_responder(CONTROLVM_BUS_DESTROY, bus_no, response); |
12e364b9 KC |
2088 | } |
2089 | ||
2090 | static void | |
52063eca | 2091 | device_create_response(u32 bus_no, u32 dev_no, int response) |
12e364b9 | 2092 | { |
8e3fedd6 | 2093 | device_responder(CONTROLVM_DEVICE_CREATE, bus_no, dev_no, response); |
12e364b9 KC |
2094 | } |
2095 | ||
2096 | static void | |
52063eca | 2097 | device_destroy_response(u32 bus_no, u32 dev_no, int response) |
12e364b9 | 2098 | { |
8e3fedd6 | 2099 | device_responder(CONTROLVM_DEVICE_DESTROY, bus_no, dev_no, response); |
12e364b9 KC |
2100 | } |
2101 | ||
2102 | void | |
52063eca | 2103 | visorchipset_device_pause_response(u32 bus_no, u32 dev_no, int response) |
12e364b9 | 2104 | { |
12e364b9 | 2105 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
8420f417 | 2106 | bus_no, dev_no, response, |
bd0d2dcc | 2107 | segment_state_standby); |
12e364b9 | 2108 | } |
927c7927 | 2109 | EXPORT_SYMBOL_GPL(visorchipset_device_pause_response); |
12e364b9 KC |
2110 | |
2111 | static void | |
52063eca | 2112 | device_resume_response(u32 bus_no, u32 dev_no, int response) |
12e364b9 KC |
2113 | { |
2114 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
8e3fedd6 | 2115 | bus_no, dev_no, response, |
bd0d2dcc | 2116 | segment_state_running); |
12e364b9 KC |
2117 | } |
2118 | ||
f4c11551 | 2119 | bool |
52063eca | 2120 | visorchipset_get_bus_info(u32 bus_no, struct visorchipset_bus_info *bus_info) |
12e364b9 | 2121 | { |
4f66520b | 2122 | void *p = bus_find(&bus_info_list, bus_no); |
26eb2c0c | 2123 | |
0aca7844 | 2124 | if (!p) |
f4c11551 | 2125 | return false; |
77db7127 | 2126 | memcpy(bus_info, p, sizeof(struct visorchipset_bus_info)); |
f4c11551 | 2127 | return true; |
12e364b9 KC |
2128 | } |
2129 | EXPORT_SYMBOL_GPL(visorchipset_get_bus_info); | |
2130 | ||
f4c11551 | 2131 | bool |
52063eca | 2132 | visorchipset_set_bus_context(u32 bus_no, void *context) |
12e364b9 | 2133 | { |
4f66520b | 2134 | struct visorchipset_bus_info *p = bus_find(&bus_info_list, bus_no); |
26eb2c0c | 2135 | |
0aca7844 | 2136 | if (!p) |
f4c11551 | 2137 | return false; |
12e364b9 | 2138 | p->bus_driver_context = context; |
f4c11551 | 2139 | return true; |
12e364b9 KC |
2140 | } |
2141 | EXPORT_SYMBOL_GPL(visorchipset_set_bus_context); | |
2142 | ||
f4c11551 | 2143 | bool |
52063eca | 2144 | visorchipset_get_device_info(u32 bus_no, u32 dev_no, |
b486df19 | 2145 | struct visorchipset_device_info *dev_info) |
12e364b9 | 2146 | { |
d480f6a2 | 2147 | void *p = device_find(&dev_info_list, bus_no, dev_no); |
26eb2c0c | 2148 | |
0aca7844 | 2149 | if (!p) |
f4c11551 | 2150 | return false; |
b486df19 | 2151 | memcpy(dev_info, p, sizeof(struct visorchipset_device_info)); |
f4c11551 | 2152 | return true; |
12e364b9 KC |
2153 | } |
2154 | EXPORT_SYMBOL_GPL(visorchipset_get_device_info); | |
2155 | ||
f4c11551 | 2156 | bool |
52063eca | 2157 | visorchipset_set_device_context(u32 bus_no, u32 dev_no, void *context) |
12e364b9 | 2158 | { |
d480f6a2 JS |
2159 | struct visorchipset_device_info *p; |
2160 | ||
2161 | p = device_find(&dev_info_list, bus_no, dev_no); | |
26eb2c0c | 2162 | |
0aca7844 | 2163 | if (!p) |
f4c11551 | 2164 | return false; |
12e364b9 | 2165 | p->bus_driver_context = context; |
f4c11551 | 2166 | return true; |
12e364b9 KC |
2167 | } |
2168 | EXPORT_SYMBOL_GPL(visorchipset_set_device_context); | |
2169 | ||
18b87ed1 | 2170 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
2171 | struct device_attribute *attr, |
2172 | const char *buf, size_t count) | |
12e364b9 | 2173 | { |
18b87ed1 | 2174 | char msgtype[64]; |
12e364b9 | 2175 | |
66e24b76 BR |
2176 | if (sscanf(buf, "%63s", msgtype) != 1) |
2177 | return -EINVAL; | |
2178 | ||
ebec8967 | 2179 | if (!strcmp(msgtype, "CALLHOMEDISK_MOUNTED")) { |
66e24b76 BR |
2180 | chipset_events[0] = 1; |
2181 | return count; | |
ebec8967 | 2182 | } else if (!strcmp(msgtype, "MODULES_LOADED")) { |
66e24b76 BR |
2183 | chipset_events[1] = 1; |
2184 | return count; | |
e22a4a0f BR |
2185 | } |
2186 | return -EINVAL; | |
12e364b9 KC |
2187 | } |
2188 | ||
e56fa7cd BR |
2189 | /* The parahotplug/devicedisabled interface gets called by our support script |
2190 | * when an SR-IOV device has been shut down. The ID is passed to the script | |
2191 | * and then passed back when the device has been removed. | |
2192 | */ | |
2193 | static ssize_t devicedisabled_store(struct device *dev, | |
8e76e695 BR |
2194 | struct device_attribute *attr, |
2195 | const char *buf, size_t count) | |
e56fa7cd | 2196 | { |
94217363 | 2197 | unsigned int id; |
e56fa7cd | 2198 | |
ebec8967 | 2199 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2200 | return -EINVAL; |
2201 | ||
2202 | parahotplug_request_complete(id, 0); | |
2203 | return count; | |
2204 | } | |
2205 | ||
2206 | /* The parahotplug/deviceenabled interface gets called by our support script | |
2207 | * when an SR-IOV device has been recovered. The ID is passed to the script | |
2208 | * and then passed back when the device has been brought back up. | |
2209 | */ | |
2210 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
2211 | struct device_attribute *attr, |
2212 | const char *buf, size_t count) | |
e56fa7cd | 2213 | { |
94217363 | 2214 | unsigned int id; |
e56fa7cd | 2215 | |
ebec8967 | 2216 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2217 | return -EINVAL; |
2218 | ||
2219 | parahotplug_request_complete(id, 1); | |
2220 | return count; | |
2221 | } | |
2222 | ||
e3420ed6 EA |
2223 | static int |
2224 | visorchipset_mmap(struct file *file, struct vm_area_struct *vma) | |
2225 | { | |
2226 | unsigned long physaddr = 0; | |
2227 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
780fcad3 | 2228 | u64 addr = 0; |
e3420ed6 EA |
2229 | |
2230 | /* sv_enable_dfp(); */ | |
2231 | if (offset & (PAGE_SIZE - 1)) | |
2232 | return -ENXIO; /* need aligned offsets */ | |
2233 | ||
2234 | switch (offset) { | |
2235 | case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: | |
2236 | vma->vm_flags |= VM_IO; | |
2237 | if (!*file_controlvm_channel) | |
2238 | return -ENXIO; | |
2239 | ||
2240 | visorchannel_read(*file_controlvm_channel, | |
2241 | offsetof(struct spar_controlvm_channel_protocol, | |
2242 | gp_control_channel), | |
2243 | &addr, sizeof(addr)); | |
2244 | if (!addr) | |
2245 | return -ENXIO; | |
2246 | ||
2247 | physaddr = (unsigned long)addr; | |
2248 | if (remap_pfn_range(vma, vma->vm_start, | |
2249 | physaddr >> PAGE_SHIFT, | |
2250 | vma->vm_end - vma->vm_start, | |
2251 | /*pgprot_noncached */ | |
2252 | (vma->vm_page_prot))) { | |
2253 | return -EAGAIN; | |
2254 | } | |
2255 | break; | |
2256 | default: | |
2257 | return -ENXIO; | |
2258 | } | |
2259 | return 0; | |
2260 | } | |
2261 | ||
2262 | static long visorchipset_ioctl(struct file *file, unsigned int cmd, | |
2263 | unsigned long arg) | |
2264 | { | |
2265 | s64 adjustment; | |
2266 | s64 vrtc_offset; | |
2267 | ||
2268 | switch (cmd) { | |
2269 | case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: | |
2270 | /* get the physical rtc offset */ | |
2271 | vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); | |
2272 | if (copy_to_user((void __user *)arg, &vrtc_offset, | |
2273 | sizeof(vrtc_offset))) { | |
2274 | return -EFAULT; | |
2275 | } | |
d5b3f1dc | 2276 | return 0; |
e3420ed6 EA |
2277 | case VMCALL_UPDATE_PHYSICAL_TIME: |
2278 | if (copy_from_user(&adjustment, (void __user *)arg, | |
2279 | sizeof(adjustment))) { | |
2280 | return -EFAULT; | |
2281 | } | |
2282 | return issue_vmcall_update_physical_time(adjustment); | |
2283 | default: | |
2284 | return -EFAULT; | |
2285 | } | |
2286 | } | |
2287 | ||
2288 | static const struct file_operations visorchipset_fops = { | |
2289 | .owner = THIS_MODULE, | |
2290 | .open = visorchipset_open, | |
2291 | .read = NULL, | |
2292 | .write = NULL, | |
2293 | .unlocked_ioctl = visorchipset_ioctl, | |
2294 | .release = visorchipset_release, | |
2295 | .mmap = visorchipset_mmap, | |
2296 | }; | |
2297 | ||
0f570fc0 | 2298 | static int |
e3420ed6 EA |
2299 | visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) |
2300 | { | |
2301 | int rc = 0; | |
2302 | ||
2303 | file_controlvm_channel = controlvm_channel; | |
2304 | cdev_init(&file_cdev, &visorchipset_fops); | |
2305 | file_cdev.owner = THIS_MODULE; | |
2306 | if (MAJOR(major_dev) == 0) { | |
46168810 | 2307 | rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset"); |
e3420ed6 EA |
2308 | /* dynamic major device number registration required */ |
2309 | if (rc < 0) | |
2310 | return rc; | |
2311 | } else { | |
2312 | /* static major device number registration required */ | |
46168810 | 2313 | rc = register_chrdev_region(major_dev, 1, "visorchipset"); |
e3420ed6 EA |
2314 | if (rc < 0) |
2315 | return rc; | |
2316 | } | |
2317 | rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); | |
2318 | if (rc < 0) { | |
2319 | unregister_chrdev_region(major_dev, 1); | |
2320 | return rc; | |
2321 | } | |
2322 | return 0; | |
2323 | } | |
2324 | ||
55c67dca PB |
2325 | static int |
2326 | visorchipset_init(struct acpi_device *acpi_device) | |
12e364b9 | 2327 | { |
33078257 | 2328 | int rc = 0; |
d5b3f1dc | 2329 | u64 addr; |
12e364b9 | 2330 | |
4da3336c | 2331 | memset(&busdev_notifiers, 0, sizeof(busdev_notifiers)); |
84982fbf | 2332 | memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); |
ea33b4ee BR |
2333 | memset(&livedump_info, 0, sizeof(livedump_info)); |
2334 | atomic_set(&livedump_info.buffers_in_use, 0); | |
12e364b9 | 2335 | |
8a1182eb | 2336 | addr = controlvm_get_channel_address(); |
ebec8967 | 2337 | if (addr) { |
df94247a JS |
2338 | int tmp_sz = sizeof(struct spar_controlvm_channel_protocol); |
2339 | uuid_le uuid = SPAR_CONTROLVM_CHANNEL_PROTOCOL_UUID; | |
c3d9a224 | 2340 | controlvm_channel = |
df94247a JS |
2341 | visorchannel_create_with_lock(addr, tmp_sz, |
2342 | GFP_KERNEL, uuid); | |
93a84565 | 2343 | if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( |
c3d9a224 | 2344 | visorchannel_get_header(controlvm_channel))) { |
8a1182eb BR |
2345 | initialize_controlvm_payload(); |
2346 | } else { | |
c3d9a224 BR |
2347 | visorchannel_destroy(controlvm_channel); |
2348 | controlvm_channel = NULL; | |
8a1182eb BR |
2349 | return -ENODEV; |
2350 | } | |
2351 | } else { | |
8a1182eb BR |
2352 | return -ENODEV; |
2353 | } | |
2354 | ||
5aa8ae57 BR |
2355 | major_dev = MKDEV(visorchipset_major, 0); |
2356 | rc = visorchipset_file_init(major_dev, &controlvm_channel); | |
4cb005a9 | 2357 | if (rc < 0) { |
4cb005a9 | 2358 | POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); |
a6a3989b | 2359 | goto cleanup; |
4cb005a9 | 2360 | } |
9f8d0e8b | 2361 | |
da021f02 | 2362 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2363 | |
4da3336c DK |
2364 | /* if booting in a crash kernel */ |
2365 | if (is_kdump_kernel()) | |
2366 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2367 | setup_crash_devices_work_queue); | |
2368 | else | |
2369 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2370 | controlvm_periodic_work); | |
2371 | periodic_controlvm_workqueue = | |
2372 | create_singlethread_workqueue("visorchipset_controlvm"); | |
2373 | ||
2374 | if (!periodic_controlvm_workqueue) { | |
2375 | POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC, | |
2376 | DIAG_SEVERITY_ERR); | |
2377 | rc = -ENOMEM; | |
2378 | goto cleanup; | |
2379 | } | |
2380 | most_recent_message_jiffies = jiffies; | |
2381 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
2382 | rc = queue_delayed_work(periodic_controlvm_workqueue, | |
2383 | &periodic_controlvm_work, poll_jiffies); | |
2384 | if (rc < 0) { | |
2385 | POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC, | |
2386 | DIAG_SEVERITY_ERR); | |
2387 | goto cleanup; | |
12e364b9 KC |
2388 | } |
2389 | ||
eb34e877 BR |
2390 | visorchipset_platform_device.dev.devt = major_dev; |
2391 | if (platform_device_register(&visorchipset_platform_device) < 0) { | |
4cb005a9 KC |
2392 | POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); |
2393 | rc = -1; | |
a6a3989b | 2394 | goto cleanup; |
4cb005a9 | 2395 | } |
12e364b9 | 2396 | POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); |
c79b28f7 PB |
2397 | |
2398 | rc = visorbus_init(); | |
a6a3989b | 2399 | cleanup: |
12e364b9 | 2400 | if (rc) { |
12e364b9 KC |
2401 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, |
2402 | POSTCODE_SEVERITY_ERR); | |
2403 | } | |
2404 | return rc; | |
2405 | } | |
2406 | ||
0f570fc0 | 2407 | static void |
e3420ed6 EA |
2408 | visorchipset_file_cleanup(dev_t major_dev) |
2409 | { | |
2410 | if (file_cdev.ops) | |
2411 | cdev_del(&file_cdev); | |
2412 | file_cdev.ops = NULL; | |
2413 | unregister_chrdev_region(major_dev, 1); | |
2414 | } | |
2415 | ||
55c67dca PB |
2416 | static int |
2417 | visorchipset_exit(struct acpi_device *acpi_device) | |
12e364b9 | 2418 | { |
12e364b9 KC |
2419 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2420 | ||
c79b28f7 PB |
2421 | visorbus_exit(); |
2422 | ||
4da3336c DK |
2423 | cancel_delayed_work(&periodic_controlvm_work); |
2424 | flush_workqueue(periodic_controlvm_workqueue); | |
2425 | destroy_workqueue(periodic_controlvm_workqueue); | |
2426 | periodic_controlvm_workqueue = NULL; | |
2427 | destroy_controlvm_payload_info(&controlvm_payload_info); | |
1783319f | 2428 | |
12e364b9 KC |
2429 | cleanup_controlvm_structures(); |
2430 | ||
da021f02 | 2431 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2432 | |
c3d9a224 | 2433 | visorchannel_destroy(controlvm_channel); |
8a1182eb | 2434 | |
addceb12 | 2435 | visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); |
12e364b9 | 2436 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
55c67dca PB |
2437 | |
2438 | return 0; | |
2439 | } | |
2440 | ||
2441 | static const struct acpi_device_id unisys_device_ids[] = { | |
2442 | {"PNP0A07", 0}, | |
2443 | {"", 0}, | |
2444 | }; | |
55c67dca PB |
2445 | |
2446 | static struct acpi_driver unisys_acpi_driver = { | |
2447 | .name = "unisys_acpi", | |
2448 | .class = "unisys_acpi_class", | |
2449 | .owner = THIS_MODULE, | |
2450 | .ids = unisys_device_ids, | |
2451 | .ops = { | |
2452 | .add = visorchipset_init, | |
2453 | .remove = visorchipset_exit, | |
2454 | }, | |
2455 | }; | |
d5b3f1dc EA |
2456 | static __init uint32_t visorutil_spar_detect(void) |
2457 | { | |
2458 | unsigned int eax, ebx, ecx, edx; | |
2459 | ||
2460 | if (cpu_has_hypervisor) { | |
2461 | /* check the ID */ | |
2462 | cpuid(UNISYS_SPAR_LEAF_ID, &eax, &ebx, &ecx, &edx); | |
2463 | return (ebx == UNISYS_SPAR_ID_EBX) && | |
2464 | (ecx == UNISYS_SPAR_ID_ECX) && | |
2465 | (edx == UNISYS_SPAR_ID_EDX); | |
2466 | } else { | |
2467 | return 0; | |
2468 | } | |
2469 | } | |
55c67dca PB |
2470 | |
2471 | static int init_unisys(void) | |
2472 | { | |
2473 | int result; | |
d5b3f1dc | 2474 | if (!visorutil_spar_detect()) |
55c67dca PB |
2475 | return -ENODEV; |
2476 | ||
2477 | result = acpi_bus_register_driver(&unisys_acpi_driver); | |
2478 | if (result) | |
2479 | return -ENODEV; | |
2480 | ||
2481 | pr_info("Unisys Visorchipset Driver Loaded.\n"); | |
2482 | return 0; | |
2483 | }; | |
2484 | ||
2485 | static void exit_unisys(void) | |
2486 | { | |
2487 | acpi_bus_unregister_driver(&unisys_acpi_driver); | |
12e364b9 KC |
2488 | } |
2489 | ||
12e364b9 | 2490 | module_param_named(major, visorchipset_major, int, S_IRUGO); |
b615d628 JS |
2491 | MODULE_PARM_DESC(visorchipset_major, |
2492 | "major device number to use for the device node"); | |
4da3336c DK |
2493 | module_param_named(visorbusregwait, visorchipset_visorbusregwait, int, S_IRUGO); |
2494 | MODULE_PARM_DESC(visorchipset_visorbusreqwait, | |
12e364b9 | 2495 | "1 to have the module wait for the visor bus to register"); |
12e364b9 KC |
2496 | module_param_named(holdchipsetready, visorchipset_holdchipsetready, |
2497 | int, S_IRUGO); | |
2498 | MODULE_PARM_DESC(visorchipset_holdchipsetready, | |
2499 | "1 to hold response to CHIPSET_READY"); | |
b615d628 | 2500 | |
55c67dca PB |
2501 | module_init(init_unisys); |
2502 | module_exit(exit_unisys); | |
12e364b9 KC |
2503 | |
2504 | MODULE_AUTHOR("Unisys"); | |
2505 | MODULE_LICENSE("GPL"); | |
2506 | MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " | |
2507 | VERSION); | |
2508 | MODULE_VERSION(VERSION); |