Commit | Line | Data |
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12e364b9 KC |
1 | /* visorchipset_main.c |
2 | * | |
f6d0c1e6 | 3 | * Copyright (C) 2010 - 2013 UNISYS CORPORATION |
12e364b9 KC |
4 | * All rights reserved. |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or (at | |
9 | * your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
14 | * NON INFRINGEMENT. See the GNU General Public License for more | |
15 | * details. | |
16 | */ | |
17 | ||
46168810 | 18 | #include "controlvmchannel.h" |
7023638c | 19 | #include "version.h" |
12e364b9 | 20 | #include "procobjecttree.h" |
f6439218 | 21 | #include "visorbus.h" |
12e364b9 | 22 | #include "periodic_work.h" |
12e364b9 | 23 | #include "uisutils.h" |
12e364b9 KC |
24 | #include "controlvmcompletionstatus.h" |
25 | #include "guestlinuxdebug.h" | |
c79b28f7 | 26 | #include "visorbus_private.h" |
12e364b9 | 27 | |
46168810 | 28 | #include <linux/ctype.h> |
e3420ed6 EA |
29 | #include <linux/fs.h> |
30 | #include <linux/mm.h> | |
12e364b9 KC |
31 | #include <linux/nls.h> |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/platform_device.h> | |
90addb02 | 34 | #include <linux/uuid.h> |
1ba00980 | 35 | #include <linux/crash_dump.h> |
12e364b9 KC |
36 | |
37 | #define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c | |
12e364b9 KC |
38 | |
39 | #define MAX_NAME_SIZE 128 | |
40 | #define MAX_IP_SIZE 50 | |
41 | #define MAXOUTSTANDINGCHANNELCOMMAND 256 | |
42 | #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 | |
43 | #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 | |
44 | ||
46168810 | 45 | #define MAX_CONTROLVM_PAYLOAD_BYTES (1024*128) |
2ee0deec PB |
46 | |
47 | #define VISORCHIPSET_MMAP_CONTROLCHANOFFSET 0x00000000 | |
48 | ||
b615d628 JS |
49 | /* |
50 | * Module parameters | |
51 | */ | |
b615d628 | 52 | static int visorchipset_major; |
4da3336c | 53 | static int visorchipset_visorbusregwait = 1; /* default is on */ |
b615d628 | 54 | static int visorchipset_holdchipsetready; |
46168810 | 55 | static unsigned long controlvm_payload_bytes_buffered; |
b615d628 | 56 | |
e3420ed6 EA |
57 | static int |
58 | visorchipset_open(struct inode *inode, struct file *file) | |
59 | { | |
60 | unsigned minor_number = iminor(inode); | |
61 | ||
62 | if (minor_number) | |
63 | return -ENODEV; | |
64 | file->private_data = NULL; | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static int | |
69 | visorchipset_release(struct inode *inode, struct file *file) | |
70 | { | |
71 | return 0; | |
72 | } | |
73 | ||
12e364b9 KC |
74 | /* When the controlvm channel is idle for at least MIN_IDLE_SECONDS, |
75 | * we switch to slow polling mode. As soon as we get a controlvm | |
76 | * message, we switch back to fast polling mode. | |
77 | */ | |
78 | #define MIN_IDLE_SECONDS 10 | |
52063eca JS |
79 | static unsigned long poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
80 | static unsigned long most_recent_message_jiffies; /* when we got our last | |
bd5b9b32 | 81 | * controlvm message */ |
4da3336c | 82 | static int visorbusregistered; |
12e364b9 KC |
83 | |
84 | #define MAX_CHIPSET_EVENTS 2 | |
c242233e | 85 | static u8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 0 }; |
12e364b9 | 86 | |
46168810 EA |
87 | struct parser_context { |
88 | unsigned long allocbytes; | |
89 | unsigned long param_bytes; | |
90 | u8 *curr; | |
91 | unsigned long bytes_remaining; | |
92 | bool byte_stream; | |
93 | char data[0]; | |
94 | }; | |
95 | ||
9232d2d6 BR |
96 | static struct delayed_work periodic_controlvm_work; |
97 | static struct workqueue_struct *periodic_controlvm_workqueue; | |
8f1947ac | 98 | static DEFINE_SEMAPHORE(notifier_lock); |
12e364b9 | 99 | |
e3420ed6 EA |
100 | static struct cdev file_cdev; |
101 | static struct visorchannel **file_controlvm_channel; | |
da021f02 | 102 | static struct controlvm_message_header g_chipset_msg_hdr; |
59827f00 | 103 | static const uuid_le spar_diag_pool_channel_protocol_uuid = |
9eee5d1f | 104 | SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID; |
12e364b9 | 105 | /* 0xffffff is an invalid Bus/Device number */ |
52063eca JS |
106 | static u32 g_diagpool_bus_no = 0xffffff; |
107 | static u32 g_diagpool_dev_no = 0xffffff; | |
4f44b72d | 108 | static struct controlvm_message_packet g_devicechangestate_packet; |
12e364b9 | 109 | |
12e364b9 | 110 | #define is_diagpool_channel(channel_type_guid) \ |
59827f00 BR |
111 | (uuid_le_cmp(channel_type_guid,\ |
112 | spar_diag_pool_channel_protocol_uuid) == 0) | |
12e364b9 | 113 | |
1390b88c BR |
114 | static LIST_HEAD(bus_info_list); |
115 | static LIST_HEAD(dev_info_list); | |
12e364b9 | 116 | |
c3d9a224 | 117 | static struct visorchannel *controlvm_channel; |
12e364b9 | 118 | |
84982fbf | 119 | /* Manages the request payload in the controlvm channel */ |
c1f834eb | 120 | struct visor_controlvm_payload_info { |
c242233e | 121 | u8 __iomem *ptr; /* pointer to base address of payload pool */ |
5fc0229a | 122 | u64 offset; /* offset from beginning of controlvm |
12e364b9 | 123 | * channel to beginning of payload * pool */ |
b3c55b13 | 124 | u32 bytes; /* number of bytes in payload pool */ |
c1f834eb JS |
125 | }; |
126 | ||
127 | static struct visor_controlvm_payload_info controlvm_payload_info; | |
12e364b9 | 128 | |
ea33b4ee BR |
129 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / |
130 | * CONTROLVM_DUMP_GETTEXTDUMP / CONTROLVM_DUMP_COMPLETE conversation. | |
131 | */ | |
c1f834eb | 132 | struct visor_livedump_info { |
ea33b4ee BR |
133 | struct controlvm_message_header dumpcapture_header; |
134 | struct controlvm_message_header gettextdump_header; | |
135 | struct controlvm_message_header dumpcomplete_header; | |
f4c11551 | 136 | bool gettextdump_outstanding; |
12e364b9 | 137 | u32 crc32; |
52063eca | 138 | unsigned long length; |
12e364b9 | 139 | atomic_t buffers_in_use; |
52063eca | 140 | unsigned long destination; |
c1f834eb JS |
141 | }; |
142 | ||
143 | static struct visor_livedump_info livedump_info; | |
12e364b9 KC |
144 | |
145 | /* The following globals are used to handle the scenario where we are unable to | |
146 | * offload the payload from a controlvm message due to memory requirements. In | |
147 | * this scenario, we simply stash the controlvm message, then attempt to | |
148 | * process it again the next time controlvm_periodic_work() runs. | |
149 | */ | |
7166ed19 | 150 | static struct controlvm_message controlvm_pending_msg; |
c79b28f7 | 151 | static bool controlvm_pending_msg_valid; |
12e364b9 | 152 | |
12e364b9 KC |
153 | /* This identifies a data buffer that has been received via a controlvm messages |
154 | * in a remote --> local CONTROLVM_TRANSMIT_FILE conversation. | |
155 | */ | |
156 | struct putfile_buffer_entry { | |
157 | struct list_head next; /* putfile_buffer_entry list */ | |
317d9614 | 158 | struct parser_context *parser_ctx; /* points to input data buffer */ |
12e364b9 KC |
159 | }; |
160 | ||
161 | /* List of struct putfile_request *, via next_putfile_request member. | |
162 | * Each entry in this list identifies an outstanding TRANSMIT_FILE | |
163 | * conversation. | |
164 | */ | |
1eee0011 | 165 | static LIST_HEAD(putfile_request_list); |
12e364b9 KC |
166 | |
167 | /* This describes a buffer and its current state of transfer (e.g., how many | |
168 | * bytes have already been supplied as putfile data, and how many bytes are | |
169 | * remaining) for a putfile_request. | |
170 | */ | |
171 | struct putfile_active_buffer { | |
172 | /* a payload from a controlvm message, containing a file data buffer */ | |
317d9614 | 173 | struct parser_context *parser_ctx; |
12e364b9 KC |
174 | /* points within data area of parser_ctx to next byte of data */ |
175 | u8 *pnext; | |
176 | /* # bytes left from <pnext> to the end of this data buffer */ | |
177 | size_t bytes_remaining; | |
178 | }; | |
179 | ||
180 | #define PUTFILE_REQUEST_SIG 0x0906101302281211 | |
181 | /* This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE | |
182 | * conversation. Structs of this type are dynamically linked into | |
183 | * <Putfile_request_list>. | |
184 | */ | |
185 | struct putfile_request { | |
186 | u64 sig; /* PUTFILE_REQUEST_SIG */ | |
187 | ||
188 | /* header from original TransmitFile request */ | |
98d7b594 | 189 | struct controlvm_message_header controlvm_header; |
12e364b9 KC |
190 | u64 file_request_number; /* from original TransmitFile request */ |
191 | ||
192 | /* link to next struct putfile_request */ | |
193 | struct list_head next_putfile_request; | |
194 | ||
195 | /* most-recent sequence number supplied via a controlvm message */ | |
196 | u64 data_sequence_number; | |
197 | ||
198 | /* head of putfile_buffer_entry list, which describes the data to be | |
199 | * supplied as putfile data; | |
200 | * - this list is added to when controlvm messages come in that supply | |
201 | * file data | |
202 | * - this list is removed from via the hotplug program that is actually | |
203 | * consuming these buffers to write as file data */ | |
204 | struct list_head input_buffer_list; | |
205 | spinlock_t req_list_lock; /* lock for input_buffer_list */ | |
206 | ||
207 | /* waiters for input_buffer_list to go non-empty */ | |
208 | wait_queue_head_t input_buffer_wq; | |
209 | ||
210 | /* data not yet read within current putfile_buffer_entry */ | |
211 | struct putfile_active_buffer active_buf; | |
212 | ||
213 | /* <0 = failed, 0 = in-progress, >0 = successful; */ | |
214 | /* note that this must be set with req_list_lock, and if you set <0, */ | |
215 | /* it is your responsibility to also free up all of the other objects */ | |
216 | /* in this struct (like input_buffer_list, active_buf.parser_ctx) */ | |
217 | /* before releasing the lock */ | |
218 | int completion_status; | |
219 | }; | |
220 | ||
12e364b9 KC |
221 | struct parahotplug_request { |
222 | struct list_head list; | |
223 | int id; | |
224 | unsigned long expiration; | |
3ab47701 | 225 | struct controlvm_message msg; |
12e364b9 KC |
226 | }; |
227 | ||
ddf5de53 BR |
228 | static LIST_HEAD(parahotplug_request_list); |
229 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ | |
12e364b9 KC |
230 | static void parahotplug_process_list(void); |
231 | ||
232 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / | |
233 | * CONTROLVM_REPORTEVENT. | |
234 | */ | |
4da3336c | 235 | static struct visorchipset_busdev_notifiers busdev_notifiers; |
12e364b9 | 236 | |
52063eca JS |
237 | static void bus_create_response(u32 bus_no, int response); |
238 | static void bus_destroy_response(u32 bus_no, int response); | |
239 | static void device_create_response(u32 bus_no, u32 dev_no, int response); | |
240 | static void device_destroy_response(u32 bus_no, u32 dev_no, int response); | |
241 | static void device_resume_response(u32 bus_no, u32 dev_no, int response); | |
12e364b9 | 242 | |
2ee0deec PB |
243 | static void visorchipset_device_pause_response(u32 bus_no, u32 dev_no, |
244 | int response); | |
245 | ||
8e3fedd6 | 246 | static struct visorchipset_busdev_responders busdev_responders = { |
12e364b9 KC |
247 | .bus_create = bus_create_response, |
248 | .bus_destroy = bus_destroy_response, | |
249 | .device_create = device_create_response, | |
250 | .device_destroy = device_destroy_response, | |
927c7927 | 251 | .device_pause = visorchipset_device_pause_response, |
12e364b9 KC |
252 | .device_resume = device_resume_response, |
253 | }; | |
254 | ||
255 | /* info for /dev/visorchipset */ | |
5aa8ae57 | 256 | static dev_t major_dev = -1; /**< indicates major num for device */ |
12e364b9 | 257 | |
19f6634f BR |
258 | /* prototypes for attributes */ |
259 | static ssize_t toolaction_show(struct device *dev, | |
8e76e695 | 260 | struct device_attribute *attr, char *buf); |
19f6634f | 261 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 BR |
262 | struct device_attribute *attr, |
263 | const char *buf, size_t count); | |
19f6634f BR |
264 | static DEVICE_ATTR_RW(toolaction); |
265 | ||
54b31229 | 266 | static ssize_t boottotool_show(struct device *dev, |
8e76e695 | 267 | struct device_attribute *attr, char *buf); |
54b31229 | 268 | static ssize_t boottotool_store(struct device *dev, |
8e76e695 BR |
269 | struct device_attribute *attr, const char *buf, |
270 | size_t count); | |
54b31229 BR |
271 | static DEVICE_ATTR_RW(boottotool); |
272 | ||
422af17c | 273 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8e76e695 | 274 | char *buf); |
422af17c | 275 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 276 | const char *buf, size_t count); |
422af17c BR |
277 | static DEVICE_ATTR_RW(error); |
278 | ||
279 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 280 | char *buf); |
422af17c | 281 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
8e76e695 | 282 | const char *buf, size_t count); |
422af17c BR |
283 | static DEVICE_ATTR_RW(textid); |
284 | ||
285 | static ssize_t remaining_steps_show(struct device *dev, | |
8e76e695 | 286 | struct device_attribute *attr, char *buf); |
422af17c | 287 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 BR |
288 | struct device_attribute *attr, |
289 | const char *buf, size_t count); | |
422af17c BR |
290 | static DEVICE_ATTR_RW(remaining_steps); |
291 | ||
18b87ed1 | 292 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
293 | struct device_attribute *attr, |
294 | const char *buf, size_t count); | |
18b87ed1 BR |
295 | static DEVICE_ATTR_WO(chipsetready); |
296 | ||
e56fa7cd | 297 | static ssize_t devicedisabled_store(struct device *dev, |
8e76e695 BR |
298 | struct device_attribute *attr, |
299 | const char *buf, size_t count); | |
e56fa7cd BR |
300 | static DEVICE_ATTR_WO(devicedisabled); |
301 | ||
302 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
303 | struct device_attribute *attr, |
304 | const char *buf, size_t count); | |
e56fa7cd BR |
305 | static DEVICE_ATTR_WO(deviceenabled); |
306 | ||
19f6634f BR |
307 | static struct attribute *visorchipset_install_attrs[] = { |
308 | &dev_attr_toolaction.attr, | |
54b31229 | 309 | &dev_attr_boottotool.attr, |
422af17c BR |
310 | &dev_attr_error.attr, |
311 | &dev_attr_textid.attr, | |
312 | &dev_attr_remaining_steps.attr, | |
19f6634f BR |
313 | NULL |
314 | }; | |
315 | ||
316 | static struct attribute_group visorchipset_install_group = { | |
317 | .name = "install", | |
318 | .attrs = visorchipset_install_attrs | |
319 | }; | |
320 | ||
18b87ed1 BR |
321 | static struct attribute *visorchipset_guest_attrs[] = { |
322 | &dev_attr_chipsetready.attr, | |
323 | NULL | |
324 | }; | |
325 | ||
326 | static struct attribute_group visorchipset_guest_group = { | |
327 | .name = "guest", | |
328 | .attrs = visorchipset_guest_attrs | |
329 | }; | |
330 | ||
e56fa7cd BR |
331 | static struct attribute *visorchipset_parahotplug_attrs[] = { |
332 | &dev_attr_devicedisabled.attr, | |
333 | &dev_attr_deviceenabled.attr, | |
334 | NULL | |
335 | }; | |
336 | ||
337 | static struct attribute_group visorchipset_parahotplug_group = { | |
338 | .name = "parahotplug", | |
339 | .attrs = visorchipset_parahotplug_attrs | |
340 | }; | |
341 | ||
19f6634f BR |
342 | static const struct attribute_group *visorchipset_dev_groups[] = { |
343 | &visorchipset_install_group, | |
18b87ed1 | 344 | &visorchipset_guest_group, |
e56fa7cd | 345 | &visorchipset_parahotplug_group, |
19f6634f BR |
346 | NULL |
347 | }; | |
348 | ||
12e364b9 | 349 | /* /sys/devices/platform/visorchipset */ |
eb34e877 | 350 | static struct platform_device visorchipset_platform_device = { |
12e364b9 KC |
351 | .name = "visorchipset", |
352 | .id = -1, | |
19f6634f | 353 | .dev.groups = visorchipset_dev_groups, |
12e364b9 KC |
354 | }; |
355 | ||
356 | /* Function prototypes */ | |
b3168c70 | 357 | static void controlvm_respond(struct controlvm_message_header *msg_hdr, |
98d7b594 BR |
358 | int response); |
359 | static void controlvm_respond_chipset_init( | |
b3168c70 | 360 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 BR |
361 | enum ultra_chipset_feature features); |
362 | static void controlvm_respond_physdev_changestate( | |
b3168c70 | 363 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 364 | struct spar_segment_state state); |
12e364b9 | 365 | |
46168810 | 366 | |
2ee0deec PB |
367 | static void parser_done(struct parser_context *ctx); |
368 | ||
46168810 EA |
369 | static struct parser_context * |
370 | parser_init_guts(u64 addr, u32 bytes, bool local, | |
371 | bool standard_payload_header, bool *retry) | |
372 | { | |
373 | int allocbytes = sizeof(struct parser_context) + bytes; | |
374 | struct parser_context *rc = NULL; | |
375 | struct parser_context *ctx = NULL; | |
46168810 EA |
376 | struct spar_controlvm_parameters_header *phdr = NULL; |
377 | ||
378 | if (retry) | |
379 | *retry = false; | |
380 | if (!standard_payload_header) | |
381 | /* alloc and 0 extra byte to ensure payload is | |
382 | * '\0'-terminated | |
383 | */ | |
384 | allocbytes++; | |
385 | if ((controlvm_payload_bytes_buffered + bytes) | |
386 | > MAX_CONTROLVM_PAYLOAD_BYTES) { | |
387 | if (retry) | |
388 | *retry = true; | |
389 | rc = NULL; | |
390 | goto cleanup; | |
391 | } | |
392 | ctx = kzalloc(allocbytes, GFP_KERNEL|__GFP_NORETRY); | |
393 | if (!ctx) { | |
394 | if (retry) | |
395 | *retry = true; | |
396 | rc = NULL; | |
397 | goto cleanup; | |
398 | } | |
399 | ||
400 | ctx->allocbytes = allocbytes; | |
401 | ctx->param_bytes = bytes; | |
402 | ctx->curr = NULL; | |
403 | ctx->bytes_remaining = 0; | |
404 | ctx->byte_stream = false; | |
405 | if (local) { | |
406 | void *p; | |
407 | ||
408 | if (addr > virt_to_phys(high_memory - 1)) { | |
409 | rc = NULL; | |
410 | goto cleanup; | |
411 | } | |
412 | p = __va((unsigned long) (addr)); | |
413 | memcpy(ctx->data, p, bytes); | |
414 | } else { | |
dd412751 JS |
415 | void __iomem *mapping; |
416 | ||
417 | if (!request_mem_region(addr, bytes, "visorchipset")) { | |
46168810 EA |
418 | rc = NULL; |
419 | goto cleanup; | |
420 | } | |
712c03dc | 421 | |
dd412751 JS |
422 | mapping = ioremap_cache(addr, bytes); |
423 | if (!mapping) { | |
424 | release_mem_region(addr, bytes); | |
46168810 EA |
425 | rc = NULL; |
426 | goto cleanup; | |
427 | } | |
dd412751 JS |
428 | memcpy_fromio(ctx->data, mapping, bytes); |
429 | release_mem_region(addr, bytes); | |
46168810 EA |
430 | } |
431 | if (!standard_payload_header) { | |
432 | ctx->byte_stream = true; | |
433 | rc = ctx; | |
434 | goto cleanup; | |
435 | } | |
436 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
437 | if (phdr->total_length != bytes) { | |
438 | rc = NULL; | |
439 | goto cleanup; | |
440 | } | |
441 | if (phdr->total_length < phdr->header_length) { | |
442 | rc = NULL; | |
443 | goto cleanup; | |
444 | } | |
445 | if (phdr->header_length < | |
446 | sizeof(struct spar_controlvm_parameters_header)) { | |
447 | rc = NULL; | |
448 | goto cleanup; | |
449 | } | |
450 | ||
451 | rc = ctx; | |
452 | cleanup: | |
46168810 EA |
453 | if (rc) { |
454 | controlvm_payload_bytes_buffered += ctx->param_bytes; | |
455 | } else { | |
456 | if (ctx) { | |
457 | parser_done(ctx); | |
458 | ctx = NULL; | |
459 | } | |
460 | } | |
461 | return rc; | |
462 | } | |
463 | ||
464 | struct parser_context * | |
465 | parser_init(u64 addr, u32 bytes, bool local, bool *retry) | |
466 | { | |
467 | return parser_init_guts(addr, bytes, local, true, retry); | |
468 | } | |
469 | ||
470 | /* Call this instead of parser_init() if the payload area consists of just | |
471 | * a sequence of bytes, rather than a struct spar_controlvm_parameters_header | |
472 | * structures. Afterwards, you can call parser_simpleString_get() or | |
473 | * parser_byteStream_get() to obtain the data. | |
474 | */ | |
475 | struct parser_context * | |
476 | parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry) | |
477 | { | |
478 | return parser_init_guts(addr, bytes, local, false, retry); | |
479 | } | |
480 | ||
481 | /* Obtain '\0'-terminated copy of string in payload area. | |
482 | */ | |
483 | char * | |
484 | parser_simpleString_get(struct parser_context *ctx) | |
485 | { | |
486 | if (!ctx->byte_stream) | |
487 | return NULL; | |
488 | return ctx->data; /* note this IS '\0'-terminated, because of | |
489 | * the num of bytes we alloc+clear in | |
490 | * parser_init_byteStream() */ | |
491 | } | |
492 | ||
493 | /* Obtain a copy of the buffer in the payload area. | |
494 | */ | |
495 | void *parser_byte_stream_get(struct parser_context *ctx, unsigned long *nbytes) | |
496 | { | |
497 | if (!ctx->byte_stream) | |
498 | return NULL; | |
499 | if (nbytes) | |
500 | *nbytes = ctx->param_bytes; | |
501 | return (void *)ctx->data; | |
502 | } | |
503 | ||
504 | uuid_le | |
505 | parser_id_get(struct parser_context *ctx) | |
506 | { | |
507 | struct spar_controlvm_parameters_header *phdr = NULL; | |
508 | ||
509 | if (ctx == NULL) | |
510 | return NULL_UUID_LE; | |
511 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
512 | return phdr->id; | |
513 | } | |
514 | ||
2ee0deec PB |
515 | /** Describes the state from the perspective of which controlvm messages have |
516 | * been received for a bus or device. | |
517 | */ | |
518 | ||
519 | enum PARSER_WHICH_STRING { | |
520 | PARSERSTRING_INITIATOR, | |
521 | PARSERSTRING_TARGET, | |
522 | PARSERSTRING_CONNECTION, | |
523 | PARSERSTRING_NAME, /* TODO: only PARSERSTRING_NAME is used ? */ | |
524 | }; | |
525 | ||
46168810 | 526 | void |
2ee0deec PB |
527 | parser_param_start(struct parser_context *ctx, |
528 | enum PARSER_WHICH_STRING which_string) | |
46168810 EA |
529 | { |
530 | struct spar_controlvm_parameters_header *phdr = NULL; | |
531 | ||
532 | if (ctx == NULL) | |
533 | goto Away; | |
534 | phdr = (struct spar_controlvm_parameters_header *)(ctx->data); | |
535 | switch (which_string) { | |
536 | case PARSERSTRING_INITIATOR: | |
537 | ctx->curr = ctx->data + phdr->initiator_offset; | |
538 | ctx->bytes_remaining = phdr->initiator_length; | |
539 | break; | |
540 | case PARSERSTRING_TARGET: | |
541 | ctx->curr = ctx->data + phdr->target_offset; | |
542 | ctx->bytes_remaining = phdr->target_length; | |
543 | break; | |
544 | case PARSERSTRING_CONNECTION: | |
545 | ctx->curr = ctx->data + phdr->connection_offset; | |
546 | ctx->bytes_remaining = phdr->connection_length; | |
547 | break; | |
548 | case PARSERSTRING_NAME: | |
549 | ctx->curr = ctx->data + phdr->name_offset; | |
550 | ctx->bytes_remaining = phdr->name_length; | |
551 | break; | |
552 | default: | |
553 | break; | |
554 | } | |
555 | ||
556 | Away: | |
557 | return; | |
558 | } | |
559 | ||
560 | void | |
561 | parser_done(struct parser_context *ctx) | |
562 | { | |
563 | if (!ctx) | |
564 | return; | |
565 | controlvm_payload_bytes_buffered -= ctx->param_bytes; | |
566 | kfree(ctx); | |
567 | } | |
568 | ||
569 | /** Return length of string not counting trailing spaces. */ | |
570 | static int | |
571 | string_length_no_trail(char *s, int len) | |
572 | { | |
573 | int i = len - 1; | |
574 | ||
575 | while (i >= 0) { | |
576 | if (!isspace(s[i])) | |
577 | return i + 1; | |
578 | i--; | |
579 | } | |
580 | return 0; | |
581 | } | |
582 | ||
583 | /** Grab the next name and value out of the parameter buffer. | |
584 | * The entire parameter buffer looks like this: | |
585 | * <name>=<value>\0 | |
586 | * <name>=<value>\0 | |
587 | * ... | |
588 | * \0 | |
589 | * If successful, the next <name> value is returned within the supplied | |
590 | * <nam> buffer (the value is always upper-cased), and the corresponding | |
591 | * <value> is returned within a kmalloc()ed buffer, whose pointer is | |
592 | * provided as the return value of this function. | |
593 | * (The total number of bytes allocated is strlen(<value>)+1.) | |
594 | * | |
595 | * NULL is returned to indicate failure, which can occur for several reasons: | |
596 | * - all <name>=<value> pairs have already been processed | |
597 | * - bad parameter | |
598 | * - parameter buffer ends prematurely (couldn't find an '=' or '\0' within | |
599 | * the confines of the parameter buffer) | |
600 | * - the <nam> buffer is not large enough to hold the <name> of the next | |
601 | * parameter | |
602 | */ | |
603 | void * | |
604 | parser_param_get(struct parser_context *ctx, char *nam, int namesize) | |
605 | { | |
606 | u8 *pscan, *pnam = nam; | |
607 | unsigned long nscan; | |
608 | int value_length = -1, orig_value_length = -1; | |
609 | void *value = NULL; | |
610 | int i; | |
611 | int closing_quote = 0; | |
612 | ||
613 | if (!ctx) | |
614 | return NULL; | |
615 | pscan = ctx->curr; | |
616 | nscan = ctx->bytes_remaining; | |
617 | if (nscan == 0) | |
618 | return NULL; | |
619 | if (*pscan == '\0') | |
620 | /* This is the normal return point after you have processed | |
621 | * all of the <name>=<value> pairs in a syntactically-valid | |
622 | * parameter buffer. | |
623 | */ | |
624 | return NULL; | |
625 | ||
626 | /* skip whitespace */ | |
627 | while (isspace(*pscan)) { | |
628 | pscan++; | |
629 | nscan--; | |
630 | if (nscan == 0) | |
631 | return NULL; | |
632 | } | |
633 | ||
634 | while (*pscan != ':') { | |
635 | if (namesize <= 0) | |
636 | return NULL; | |
637 | *pnam = toupper(*pscan); | |
638 | pnam++; | |
639 | namesize--; | |
640 | pscan++; | |
641 | nscan--; | |
642 | if (nscan == 0) | |
643 | return NULL; | |
644 | } | |
645 | if (namesize <= 0) | |
646 | return NULL; | |
647 | *pnam = '\0'; | |
648 | nam[string_length_no_trail(nam, strlen(nam))] = '\0'; | |
649 | ||
650 | /* point to char immediately after ":" in "<name>:<value>" */ | |
651 | pscan++; | |
652 | nscan--; | |
653 | /* skip whitespace */ | |
654 | while (isspace(*pscan)) { | |
655 | pscan++; | |
656 | nscan--; | |
657 | if (nscan == 0) | |
658 | return NULL; | |
659 | } | |
660 | if (nscan == 0) | |
661 | return NULL; | |
662 | if (*pscan == '\'' || *pscan == '"') { | |
663 | closing_quote = *pscan; | |
664 | pscan++; | |
665 | nscan--; | |
666 | if (nscan == 0) | |
667 | return NULL; | |
668 | } | |
669 | ||
670 | /* look for a separator character, terminator character, or | |
671 | * end of data | |
672 | */ | |
673 | for (i = 0, value_length = -1; i < nscan; i++) { | |
674 | if (closing_quote) { | |
675 | if (pscan[i] == '\0') | |
676 | return NULL; | |
677 | if (pscan[i] == closing_quote) { | |
678 | value_length = i; | |
679 | break; | |
680 | } | |
681 | } else | |
682 | if (pscan[i] == ',' || pscan[i] == ';' | |
683 | || pscan[i] == '\0') { | |
684 | value_length = i; | |
685 | break; | |
686 | } | |
687 | } | |
688 | if (value_length < 0) { | |
689 | if (closing_quote) | |
690 | return NULL; | |
691 | value_length = nscan; | |
692 | } | |
693 | orig_value_length = value_length; | |
694 | if (closing_quote == 0) | |
695 | value_length = string_length_no_trail(pscan, orig_value_length); | |
696 | value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY); | |
697 | if (value == NULL) | |
698 | return NULL; | |
699 | memcpy(value, pscan, value_length); | |
700 | ((u8 *) (value))[value_length] = '\0'; | |
701 | ||
702 | pscan += orig_value_length; | |
703 | nscan -= orig_value_length; | |
704 | ||
705 | /* skip past separator or closing quote */ | |
706 | if (nscan > 0) { | |
707 | if (*pscan != '\0') { | |
708 | pscan++; | |
709 | nscan--; | |
710 | } | |
711 | } | |
712 | ||
713 | if (closing_quote && (nscan > 0)) { | |
714 | /* we still need to skip around the real separator if present */ | |
715 | /* first, skip whitespace */ | |
716 | while (isspace(*pscan)) { | |
717 | pscan++; | |
718 | nscan--; | |
719 | if (nscan == 0) | |
720 | break; | |
721 | } | |
722 | if (nscan > 0) { | |
723 | if (*pscan == ',' || *pscan == ';') { | |
724 | pscan++; | |
725 | nscan--; | |
726 | } else if (*pscan != '\0') { | |
727 | kfree(value); | |
728 | value = NULL; | |
729 | return NULL; | |
730 | } | |
731 | } | |
732 | } | |
733 | ctx->curr = pscan; | |
734 | ctx->bytes_remaining = nscan; | |
735 | return value; | |
736 | } | |
737 | ||
738 | void * | |
739 | parser_string_get(struct parser_context *ctx) | |
740 | { | |
741 | u8 *pscan; | |
742 | unsigned long nscan; | |
743 | int value_length = -1; | |
744 | void *value = NULL; | |
745 | int i; | |
746 | ||
747 | if (!ctx) | |
748 | return NULL; | |
749 | pscan = ctx->curr; | |
750 | nscan = ctx->bytes_remaining; | |
751 | if (nscan == 0) | |
752 | return NULL; | |
753 | if (!pscan) | |
754 | return NULL; | |
755 | for (i = 0, value_length = -1; i < nscan; i++) | |
756 | if (pscan[i] == '\0') { | |
757 | value_length = i; | |
758 | break; | |
759 | } | |
760 | if (value_length < 0) /* '\0' was not included in the length */ | |
761 | value_length = nscan; | |
762 | value = kmalloc(value_length + 1, GFP_KERNEL|__GFP_NORETRY); | |
763 | if (value == NULL) | |
764 | return NULL; | |
765 | if (value_length > 0) | |
766 | memcpy(value, pscan, value_length); | |
767 | ((u8 *) (value))[value_length] = '\0'; | |
768 | return value; | |
769 | } | |
770 | ||
771 | ||
d746cb55 VB |
772 | static ssize_t toolaction_show(struct device *dev, |
773 | struct device_attribute *attr, | |
774 | char *buf) | |
19f6634f | 775 | { |
01f4d85a | 776 | u8 tool_action; |
19f6634f | 777 | |
c3d9a224 | 778 | visorchannel_read(controlvm_channel, |
d19642f6 | 779 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 | 780 | tool_action), &tool_action, sizeof(u8)); |
01f4d85a | 781 | return scnprintf(buf, PAGE_SIZE, "%u\n", tool_action); |
19f6634f BR |
782 | } |
783 | ||
d746cb55 VB |
784 | static ssize_t toolaction_store(struct device *dev, |
785 | struct device_attribute *attr, | |
786 | const char *buf, size_t count) | |
19f6634f | 787 | { |
01f4d85a | 788 | u8 tool_action; |
66e24b76 | 789 | int ret; |
19f6634f | 790 | |
ebec8967 | 791 | if (kstrtou8(buf, 10, &tool_action)) |
66e24b76 BR |
792 | return -EINVAL; |
793 | ||
c3d9a224 | 794 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
795 | offsetof(struct spar_controlvm_channel_protocol, |
796 | tool_action), | |
01f4d85a | 797 | &tool_action, sizeof(u8)); |
66e24b76 BR |
798 | |
799 | if (ret) | |
800 | return ret; | |
e22a4a0f | 801 | return count; |
19f6634f BR |
802 | } |
803 | ||
d746cb55 VB |
804 | static ssize_t boottotool_show(struct device *dev, |
805 | struct device_attribute *attr, | |
806 | char *buf) | |
54b31229 | 807 | { |
365522d9 | 808 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 809 | |
c3d9a224 | 810 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
811 | offsetof(struct spar_controlvm_channel_protocol, |
812 | efi_spar_ind), &efi_spar_indication, | |
813 | sizeof(struct efi_spar_indication)); | |
54b31229 | 814 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
8e76e695 | 815 | efi_spar_indication.boot_to_tool); |
54b31229 BR |
816 | } |
817 | ||
d746cb55 VB |
818 | static ssize_t boottotool_store(struct device *dev, |
819 | struct device_attribute *attr, | |
820 | const char *buf, size_t count) | |
54b31229 | 821 | { |
66e24b76 | 822 | int val, ret; |
365522d9 | 823 | struct efi_spar_indication efi_spar_indication; |
54b31229 | 824 | |
ebec8967 | 825 | if (kstrtoint(buf, 10, &val)) |
66e24b76 BR |
826 | return -EINVAL; |
827 | ||
365522d9 | 828 | efi_spar_indication.boot_to_tool = val; |
c3d9a224 | 829 | ret = visorchannel_write(controlvm_channel, |
d19642f6 | 830 | offsetof(struct spar_controlvm_channel_protocol, |
8e76e695 BR |
831 | efi_spar_ind), &(efi_spar_indication), |
832 | sizeof(struct efi_spar_indication)); | |
66e24b76 BR |
833 | |
834 | if (ret) | |
835 | return ret; | |
e22a4a0f | 836 | return count; |
54b31229 | 837 | } |
422af17c BR |
838 | |
839 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 840 | char *buf) |
422af17c BR |
841 | { |
842 | u32 error; | |
843 | ||
8e76e695 BR |
844 | visorchannel_read(controlvm_channel, |
845 | offsetof(struct spar_controlvm_channel_protocol, | |
846 | installation_error), | |
847 | &error, sizeof(u32)); | |
422af17c BR |
848 | return scnprintf(buf, PAGE_SIZE, "%i\n", error); |
849 | } | |
850 | ||
851 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 852 | const char *buf, size_t count) |
422af17c BR |
853 | { |
854 | u32 error; | |
66e24b76 | 855 | int ret; |
422af17c | 856 | |
ebec8967 | 857 | if (kstrtou32(buf, 10, &error)) |
66e24b76 BR |
858 | return -EINVAL; |
859 | ||
c3d9a224 | 860 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
861 | offsetof(struct spar_controlvm_channel_protocol, |
862 | installation_error), | |
863 | &error, sizeof(u32)); | |
66e24b76 BR |
864 | if (ret) |
865 | return ret; | |
e22a4a0f | 866 | return count; |
422af17c BR |
867 | } |
868 | ||
869 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 870 | char *buf) |
422af17c | 871 | { |
10dbf0e3 | 872 | u32 text_id; |
422af17c | 873 | |
8e76e695 BR |
874 | visorchannel_read(controlvm_channel, |
875 | offsetof(struct spar_controlvm_channel_protocol, | |
876 | installation_text_id), | |
877 | &text_id, sizeof(u32)); | |
10dbf0e3 | 878 | return scnprintf(buf, PAGE_SIZE, "%i\n", text_id); |
422af17c BR |
879 | } |
880 | ||
881 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, | |
8e76e695 | 882 | const char *buf, size_t count) |
422af17c | 883 | { |
10dbf0e3 | 884 | u32 text_id; |
66e24b76 | 885 | int ret; |
422af17c | 886 | |
ebec8967 | 887 | if (kstrtou32(buf, 10, &text_id)) |
66e24b76 BR |
888 | return -EINVAL; |
889 | ||
c3d9a224 | 890 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
891 | offsetof(struct spar_controlvm_channel_protocol, |
892 | installation_text_id), | |
893 | &text_id, sizeof(u32)); | |
66e24b76 BR |
894 | if (ret) |
895 | return ret; | |
e22a4a0f | 896 | return count; |
422af17c BR |
897 | } |
898 | ||
422af17c | 899 | static ssize_t remaining_steps_show(struct device *dev, |
8e76e695 | 900 | struct device_attribute *attr, char *buf) |
422af17c | 901 | { |
ee8da290 | 902 | u16 remaining_steps; |
422af17c | 903 | |
c3d9a224 | 904 | visorchannel_read(controlvm_channel, |
8e76e695 BR |
905 | offsetof(struct spar_controlvm_channel_protocol, |
906 | installation_remaining_steps), | |
907 | &remaining_steps, sizeof(u16)); | |
ee8da290 | 908 | return scnprintf(buf, PAGE_SIZE, "%hu\n", remaining_steps); |
422af17c BR |
909 | } |
910 | ||
911 | static ssize_t remaining_steps_store(struct device *dev, | |
8e76e695 BR |
912 | struct device_attribute *attr, |
913 | const char *buf, size_t count) | |
422af17c | 914 | { |
ee8da290 | 915 | u16 remaining_steps; |
66e24b76 | 916 | int ret; |
422af17c | 917 | |
ebec8967 | 918 | if (kstrtou16(buf, 10, &remaining_steps)) |
66e24b76 BR |
919 | return -EINVAL; |
920 | ||
c3d9a224 | 921 | ret = visorchannel_write(controlvm_channel, |
8e76e695 BR |
922 | offsetof(struct spar_controlvm_channel_protocol, |
923 | installation_remaining_steps), | |
924 | &remaining_steps, sizeof(u16)); | |
66e24b76 BR |
925 | if (ret) |
926 | return ret; | |
e22a4a0f | 927 | return count; |
422af17c BR |
928 | } |
929 | ||
12e364b9 | 930 | static void |
9b989a98 | 931 | bus_info_clear(void *v) |
12e364b9 | 932 | { |
bbd4be30 | 933 | struct visorchipset_bus_info *p = (struct visorchipset_bus_info *) v; |
12e364b9 | 934 | |
12e364b9 | 935 | kfree(p->name); |
12e364b9 | 936 | kfree(p->description); |
33192fa1 | 937 | memset(p, 0, sizeof(struct visorchipset_bus_info)); |
12e364b9 KC |
938 | } |
939 | ||
940 | static void | |
9b989a98 | 941 | dev_info_clear(void *v) |
12e364b9 | 942 | { |
246e0cd0 | 943 | struct visorchipset_device_info *p = |
bbd4be30 | 944 | (struct visorchipset_device_info *) v; |
26eb2c0c | 945 | |
246e0cd0 | 946 | memset(p, 0, sizeof(struct visorchipset_device_info)); |
12e364b9 KC |
947 | } |
948 | ||
4f66520b JS |
949 | static struct visorchipset_bus_info * |
950 | bus_find(struct list_head *list, u32 bus_no) | |
951 | { | |
952 | struct visorchipset_bus_info *p; | |
953 | ||
954 | list_for_each_entry(p, list, entry) { | |
955 | if (p->bus_no == bus_no) | |
956 | return p; | |
957 | } | |
958 | ||
959 | return NULL; | |
960 | } | |
961 | ||
d480f6a2 JS |
962 | static struct visorchipset_device_info * |
963 | device_find(struct list_head *list, u32 bus_no, u32 dev_no) | |
964 | { | |
965 | struct visorchipset_device_info *p; | |
966 | ||
967 | list_for_each_entry(p, list, entry) { | |
968 | if (p->bus_no == bus_no && p->dev_no == dev_no) | |
969 | return p; | |
970 | } | |
971 | ||
972 | return NULL; | |
973 | } | |
974 | ||
28723521 JS |
975 | static void busdevices_del(struct list_head *list, u32 bus_no) |
976 | { | |
977 | struct visorchipset_device_info *p, *tmp; | |
978 | ||
979 | list_for_each_entry_safe(p, tmp, list, entry) { | |
980 | if (p->bus_no == bus_no) { | |
981 | list_del(&p->entry); | |
982 | kfree(p); | |
983 | } | |
984 | } | |
985 | } | |
986 | ||
c242233e | 987 | static u8 |
12e364b9 KC |
988 | check_chipset_events(void) |
989 | { | |
990 | int i; | |
c242233e | 991 | u8 send_msg = 1; |
12e364b9 KC |
992 | /* Check events to determine if response should be sent */ |
993 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
994 | send_msg &= chipset_events[i]; | |
995 | return send_msg; | |
996 | } | |
997 | ||
998 | static void | |
999 | clear_chipset_events(void) | |
1000 | { | |
1001 | int i; | |
1002 | /* Clear chipset_events */ | |
1003 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) | |
1004 | chipset_events[i] = 0; | |
1005 | } | |
1006 | ||
1007 | void | |
4da3336c | 1008 | visorchipset_register_busdev( |
fe90d892 | 1009 | struct visorchipset_busdev_notifiers *notifiers, |
929aa8ae | 1010 | struct visorchipset_busdev_responders *responders, |
1e7a59c1 | 1011 | struct ultra_vbus_deviceinfo *driver_info) |
12e364b9 | 1012 | { |
8f1947ac | 1013 | down(¬ifier_lock); |
38f736e9 | 1014 | if (!notifiers) { |
4da3336c DK |
1015 | memset(&busdev_notifiers, 0, |
1016 | sizeof(busdev_notifiers)); | |
1017 | visorbusregistered = 0; /* clear flag */ | |
12e364b9 | 1018 | } else { |
4da3336c DK |
1019 | busdev_notifiers = *notifiers; |
1020 | visorbusregistered = 1; /* set flag */ | |
12e364b9 KC |
1021 | } |
1022 | if (responders) | |
8e3fedd6 | 1023 | *responders = busdev_responders; |
1e7a59c1 BR |
1024 | if (driver_info) |
1025 | bus_device_info_init(driver_info, "chipset", "visorchipset", | |
8e76e695 | 1026 | VERSION, NULL); |
12e364b9 | 1027 | |
8f1947ac | 1028 | up(¬ifier_lock); |
12e364b9 | 1029 | } |
4da3336c | 1030 | EXPORT_SYMBOL_GPL(visorchipset_register_busdev); |
12e364b9 KC |
1031 | |
1032 | static void | |
1033 | cleanup_controlvm_structures(void) | |
1034 | { | |
33192fa1 | 1035 | struct visorchipset_bus_info *bi, *tmp_bi; |
246e0cd0 | 1036 | struct visorchipset_device_info *di, *tmp_di; |
12e364b9 | 1037 | |
1390b88c | 1038 | list_for_each_entry_safe(bi, tmp_bi, &bus_info_list, entry) { |
9b989a98 | 1039 | bus_info_clear(bi); |
12e364b9 KC |
1040 | list_del(&bi->entry); |
1041 | kfree(bi); | |
1042 | } | |
1043 | ||
1390b88c | 1044 | list_for_each_entry_safe(di, tmp_di, &dev_info_list, entry) { |
9b989a98 | 1045 | dev_info_clear(di); |
12e364b9 KC |
1046 | list_del(&di->entry); |
1047 | kfree(di); | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | static void | |
3ab47701 | 1052 | chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
1053 | { |
1054 | static int chipset_inited; | |
b9b141e8 | 1055 | enum ultra_chipset_feature features = 0; |
12e364b9 KC |
1056 | int rc = CONTROLVM_RESP_SUCCESS; |
1057 | ||
1058 | POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
1059 | if (chipset_inited) { | |
22ad57ba | 1060 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
e3199b2e | 1061 | goto cleanup; |
12e364b9 KC |
1062 | } |
1063 | chipset_inited = 1; | |
1064 | POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); | |
1065 | ||
1066 | /* Set features to indicate we support parahotplug (if Command | |
1067 | * also supports it). */ | |
1068 | features = | |
2ea5117b | 1069 | inmsg->cmd.init_chipset. |
12e364b9 KC |
1070 | features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; |
1071 | ||
1072 | /* Set the "reply" bit so Command knows this is a | |
1073 | * features-aware driver. */ | |
1074 | features |= ULTRA_CHIPSET_FEATURE_REPLY; | |
1075 | ||
e3199b2e | 1076 | cleanup: |
12e364b9 KC |
1077 | if (rc < 0) |
1078 | cleanup_controlvm_structures(); | |
98d7b594 | 1079 | if (inmsg->hdr.flags.response_expected) |
12e364b9 KC |
1080 | controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
1081 | } | |
1082 | ||
1083 | static void | |
3ab47701 | 1084 | controlvm_init_response(struct controlvm_message *msg, |
b3168c70 | 1085 | struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 1086 | { |
3ab47701 | 1087 | memset(msg, 0, sizeof(struct controlvm_message)); |
b3168c70 | 1088 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); |
98d7b594 BR |
1089 | msg->hdr.payload_bytes = 0; |
1090 | msg->hdr.payload_vm_offset = 0; | |
1091 | msg->hdr.payload_max_bytes = 0; | |
12e364b9 | 1092 | if (response < 0) { |
98d7b594 BR |
1093 | msg->hdr.flags.failed = 1; |
1094 | msg->hdr.completion_status = (u32) (-response); | |
12e364b9 KC |
1095 | } |
1096 | } | |
1097 | ||
1098 | static void | |
b3168c70 | 1099 | controlvm_respond(struct controlvm_message_header *msg_hdr, int response) |
12e364b9 | 1100 | { |
3ab47701 | 1101 | struct controlvm_message outmsg; |
26eb2c0c | 1102 | |
b3168c70 | 1103 | controlvm_init_response(&outmsg, msg_hdr, response); |
12e364b9 KC |
1104 | /* For DiagPool channel DEVICE_CHANGESTATE, we need to send |
1105 | * back the deviceChangeState structure in the packet. */ | |
b3168c70 | 1106 | if (msg_hdr->id == CONTROLVM_DEVICE_CHANGESTATE && |
0639ba67 BR |
1107 | g_devicechangestate_packet.device_change_state.bus_no == |
1108 | g_diagpool_bus_no && | |
1109 | g_devicechangestate_packet.device_change_state.dev_no == | |
83d48905 | 1110 | g_diagpool_dev_no) |
4f44b72d | 1111 | outmsg.cmd = g_devicechangestate_packet; |
2098dbd1 | 1112 | if (outmsg.hdr.flags.test_message == 1) |
12e364b9 | 1113 | return; |
2098dbd1 | 1114 | |
c3d9a224 | 1115 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 1116 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
1117 | return; |
1118 | } | |
1119 | } | |
1120 | ||
1121 | static void | |
b3168c70 | 1122 | controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, |
98d7b594 | 1123 | int response, |
b9b141e8 | 1124 | enum ultra_chipset_feature features) |
12e364b9 | 1125 | { |
3ab47701 | 1126 | struct controlvm_message outmsg; |
26eb2c0c | 1127 | |
b3168c70 | 1128 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b | 1129 | outmsg.cmd.init_chipset.features = features; |
c3d9a224 | 1130 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 1131 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
1132 | return; |
1133 | } | |
1134 | } | |
1135 | ||
98d7b594 | 1136 | static void controlvm_respond_physdev_changestate( |
b3168c70 | 1137 | struct controlvm_message_header *msg_hdr, int response, |
98d7b594 | 1138 | struct spar_segment_state state) |
12e364b9 | 1139 | { |
3ab47701 | 1140 | struct controlvm_message outmsg; |
26eb2c0c | 1141 | |
b3168c70 | 1142 | controlvm_init_response(&outmsg, msg_hdr, response); |
2ea5117b BR |
1143 | outmsg.cmd.device_change_state.state = state; |
1144 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
c3d9a224 | 1145 | if (!visorchannel_signalinsert(controlvm_channel, |
12e364b9 | 1146 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
12e364b9 KC |
1147 | return; |
1148 | } | |
1149 | } | |
1150 | ||
2ee0deec PB |
1151 | enum crash_obj_type { |
1152 | CRASH_DEV, | |
1153 | CRASH_BUS, | |
1154 | }; | |
1155 | ||
12e364b9 | 1156 | void |
2c683cde BR |
1157 | visorchipset_save_message(struct controlvm_message *msg, |
1158 | enum crash_obj_type type) | |
12e364b9 | 1159 | { |
4577225d BR |
1160 | u32 crash_msg_offset; |
1161 | u16 crash_msg_count; | |
12e364b9 KC |
1162 | |
1163 | /* get saved message count */ | |
c3d9a224 | 1164 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1165 | offsetof(struct spar_controlvm_channel_protocol, |
1166 | saved_crash_message_count), | |
4577225d | 1167 | &crash_msg_count, sizeof(u16)) < 0) { |
12e364b9 KC |
1168 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
1169 | POSTCODE_SEVERITY_ERR); | |
1170 | return; | |
1171 | } | |
1172 | ||
4577225d | 1173 | if (crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
12e364b9 | 1174 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
4577225d | 1175 | crash_msg_count, |
12e364b9 KC |
1176 | POSTCODE_SEVERITY_ERR); |
1177 | return; | |
1178 | } | |
1179 | ||
1180 | /* get saved crash message offset */ | |
c3d9a224 | 1181 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1182 | offsetof(struct spar_controlvm_channel_protocol, |
1183 | saved_crash_message_offset), | |
4577225d | 1184 | &crash_msg_offset, sizeof(u32)) < 0) { |
12e364b9 KC |
1185 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
1186 | POSTCODE_SEVERITY_ERR); | |
1187 | return; | |
1188 | } | |
1189 | ||
2c683cde | 1190 | if (type == CRASH_BUS) { |
c3d9a224 | 1191 | if (visorchannel_write(controlvm_channel, |
4577225d | 1192 | crash_msg_offset, |
3ab47701 BR |
1193 | msg, |
1194 | sizeof(struct controlvm_message)) < 0) { | |
12e364b9 KC |
1195 | POSTCODE_LINUX_2(SAVE_MSG_BUS_FAILURE_PC, |
1196 | POSTCODE_SEVERITY_ERR); | |
1197 | return; | |
1198 | } | |
2ee0deec | 1199 | } else { /* CRASH_DEV */ |
c3d9a224 | 1200 | if (visorchannel_write(controlvm_channel, |
4577225d | 1201 | crash_msg_offset + |
3ab47701 BR |
1202 | sizeof(struct controlvm_message), msg, |
1203 | sizeof(struct controlvm_message)) < 0) { | |
12e364b9 KC |
1204 | POSTCODE_LINUX_2(SAVE_MSG_DEV_FAILURE_PC, |
1205 | POSTCODE_SEVERITY_ERR); | |
1206 | return; | |
1207 | } | |
1208 | } | |
1209 | } | |
1210 | EXPORT_SYMBOL_GPL(visorchipset_save_message); | |
1211 | ||
1212 | static void | |
52063eca | 1213 | bus_responder(enum controlvm_id cmd_id, u32 bus_no, int response) |
12e364b9 | 1214 | { |
e82ba62e | 1215 | struct visorchipset_bus_info *p; |
f4c11551 | 1216 | bool need_clear = false; |
12e364b9 | 1217 | |
4f66520b | 1218 | p = bus_find(&bus_info_list, bus_no); |
0aca7844 | 1219 | if (!p) |
12e364b9 | 1220 | return; |
0aca7844 | 1221 | |
12e364b9 | 1222 | if (response < 0) { |
fbb31f48 | 1223 | if ((cmd_id == CONTROLVM_BUS_CREATE) && |
12e364b9 KC |
1224 | (response != (-CONTROLVM_RESP_ERROR_ALREADY_DONE))) |
1225 | /* undo the row we just created... */ | |
28723521 | 1226 | busdevices_del(&dev_info_list, bus_no); |
12e364b9 | 1227 | } else { |
fbb31f48 | 1228 | if (cmd_id == CONTROLVM_BUS_CREATE) |
12e364b9 | 1229 | p->state.created = 1; |
fbb31f48 | 1230 | if (cmd_id == CONTROLVM_BUS_DESTROY) |
f4c11551 | 1231 | need_clear = true; |
12e364b9 KC |
1232 | } |
1233 | ||
0aca7844 | 1234 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 1235 | return; /* no controlvm response needed */ |
6b59b31d | 1236 | if (p->pending_msg_hdr.id != (u32)cmd_id) |
12e364b9 | 1237 | return; |
33192fa1 BR |
1238 | controlvm_respond(&p->pending_msg_hdr, response); |
1239 | p->pending_msg_hdr.id = CONTROLVM_INVALID; | |
12e364b9 | 1240 | if (need_clear) { |
9b989a98 | 1241 | bus_info_clear(p); |
28723521 | 1242 | busdevices_del(&dev_info_list, bus_no); |
12e364b9 KC |
1243 | } |
1244 | } | |
1245 | ||
1246 | static void | |
fbb31f48 | 1247 | device_changestate_responder(enum controlvm_id cmd_id, |
52063eca | 1248 | u32 bus_no, u32 dev_no, int response, |
fbb31f48 | 1249 | struct spar_segment_state response_state) |
12e364b9 | 1250 | { |
e82ba62e | 1251 | struct visorchipset_device_info *p; |
3ab47701 | 1252 | struct controlvm_message outmsg; |
12e364b9 | 1253 | |
d480f6a2 | 1254 | p = device_find(&dev_info_list, bus_no, dev_no); |
0aca7844 | 1255 | if (!p) |
12e364b9 | 1256 | return; |
0aca7844 | 1257 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 1258 | return; /* no controlvm response needed */ |
fbb31f48 | 1259 | if (p->pending_msg_hdr.id != cmd_id) |
12e364b9 | 1260 | return; |
12e364b9 | 1261 | |
246e0cd0 | 1262 | controlvm_init_response(&outmsg, &p->pending_msg_hdr, response); |
12e364b9 | 1263 | |
fbb31f48 BR |
1264 | outmsg.cmd.device_change_state.bus_no = bus_no; |
1265 | outmsg.cmd.device_change_state.dev_no = dev_no; | |
1266 | outmsg.cmd.device_change_state.state = response_state; | |
12e364b9 | 1267 | |
c3d9a224 | 1268 | if (!visorchannel_signalinsert(controlvm_channel, |
0aca7844 | 1269 | CONTROLVM_QUEUE_REQUEST, &outmsg)) |
12e364b9 | 1270 | return; |
12e364b9 | 1271 | |
246e0cd0 | 1272 | p->pending_msg_hdr.id = CONTROLVM_INVALID; |
12e364b9 KC |
1273 | } |
1274 | ||
1275 | static void | |
52063eca | 1276 | device_responder(enum controlvm_id cmd_id, u32 bus_no, u32 dev_no, int response) |
12e364b9 | 1277 | { |
e82ba62e | 1278 | struct visorchipset_device_info *p; |
f4c11551 | 1279 | bool need_clear = false; |
12e364b9 | 1280 | |
d480f6a2 | 1281 | p = device_find(&dev_info_list, bus_no, dev_no); |
0aca7844 | 1282 | if (!p) |
12e364b9 | 1283 | return; |
12e364b9 | 1284 | if (response >= 0) { |
fbb31f48 | 1285 | if (cmd_id == CONTROLVM_DEVICE_CREATE) |
12e364b9 | 1286 | p->state.created = 1; |
fbb31f48 | 1287 | if (cmd_id == CONTROLVM_DEVICE_DESTROY) |
f4c11551 | 1288 | need_clear = true; |
12e364b9 KC |
1289 | } |
1290 | ||
0aca7844 | 1291 | if (p->pending_msg_hdr.id == CONTROLVM_INVALID) |
12e364b9 | 1292 | return; /* no controlvm response needed */ |
0aca7844 | 1293 | |
6b59b31d | 1294 | if (p->pending_msg_hdr.id != (u32)cmd_id) |
12e364b9 | 1295 | return; |
0aca7844 | 1296 | |
246e0cd0 BR |
1297 | controlvm_respond(&p->pending_msg_hdr, response); |
1298 | p->pending_msg_hdr.id = CONTROLVM_INVALID; | |
12e364b9 | 1299 | if (need_clear) |
9b989a98 | 1300 | dev_info_clear(p); |
12e364b9 KC |
1301 | } |
1302 | ||
1303 | static void | |
2836c6a8 BR |
1304 | bus_epilog(u32 bus_no, |
1305 | u32 cmd, struct controlvm_message_header *msg_hdr, | |
f4c11551 | 1306 | int response, bool need_response) |
12e364b9 | 1307 | { |
4f66520b | 1308 | struct visorchipset_bus_info *bus_info; |
f4c11551 | 1309 | bool notified = false; |
12e364b9 | 1310 | |
4f66520b | 1311 | bus_info = bus_find(&bus_info_list, bus_no); |
12e364b9 | 1312 | |
2836c6a8 | 1313 | if (!bus_info) |
12e364b9 | 1314 | return; |
0aca7844 | 1315 | |
2836c6a8 BR |
1316 | if (need_response) { |
1317 | memcpy(&bus_info->pending_msg_hdr, msg_hdr, | |
98d7b594 | 1318 | sizeof(struct controlvm_message_header)); |
75c1f8b7 | 1319 | } else { |
2836c6a8 | 1320 | bus_info->pending_msg_hdr.id = CONTROLVM_INVALID; |
75c1f8b7 | 1321 | } |
12e364b9 | 1322 | |
8f1947ac | 1323 | down(¬ifier_lock); |
12e364b9 KC |
1324 | if (response == CONTROLVM_RESP_SUCCESS) { |
1325 | switch (cmd) { | |
1326 | case CONTROLVM_BUS_CREATE: | |
4da3336c DK |
1327 | if (busdev_notifiers.bus_create) { |
1328 | (*busdev_notifiers.bus_create) (bus_no); | |
f4c11551 | 1329 | notified = true; |
12e364b9 KC |
1330 | } |
1331 | break; | |
1332 | case CONTROLVM_BUS_DESTROY: | |
4da3336c DK |
1333 | if (busdev_notifiers.bus_destroy) { |
1334 | (*busdev_notifiers.bus_destroy) (bus_no); | |
f4c11551 | 1335 | notified = true; |
12e364b9 KC |
1336 | } |
1337 | break; | |
1338 | } | |
1339 | } | |
1340 | if (notified) | |
1341 | /* The callback function just called above is responsible | |
929aa8ae | 1342 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1343 | * function, which will call bus_responder() |
1344 | */ | |
1345 | ; | |
1346 | else | |
2836c6a8 | 1347 | bus_responder(cmd, bus_no, response); |
8f1947ac | 1348 | up(¬ifier_lock); |
12e364b9 KC |
1349 | } |
1350 | ||
1351 | static void | |
2836c6a8 BR |
1352 | device_epilog(u32 bus_no, u32 dev_no, struct spar_segment_state state, u32 cmd, |
1353 | struct controlvm_message_header *msg_hdr, int response, | |
f4c11551 | 1354 | bool need_response, bool for_visorbus) |
12e364b9 | 1355 | { |
e82ba62e | 1356 | struct visorchipset_busdev_notifiers *notifiers; |
f4c11551 | 1357 | bool notified = false; |
12e364b9 | 1358 | |
2836c6a8 | 1359 | struct visorchipset_device_info *dev_info = |
d480f6a2 | 1360 | device_find(&dev_info_list, bus_no, dev_no); |
12e364b9 KC |
1361 | char *envp[] = { |
1362 | "SPARSP_DIAGPOOL_PAUSED_STATE = 1", | |
1363 | NULL | |
1364 | }; | |
1365 | ||
2836c6a8 | 1366 | if (!dev_info) |
12e364b9 | 1367 | return; |
0aca7844 | 1368 | |
4da3336c DK |
1369 | notifiers = &busdev_notifiers; |
1370 | ||
2836c6a8 BR |
1371 | if (need_response) { |
1372 | memcpy(&dev_info->pending_msg_hdr, msg_hdr, | |
98d7b594 | 1373 | sizeof(struct controlvm_message_header)); |
75c1f8b7 | 1374 | } else { |
2836c6a8 | 1375 | dev_info->pending_msg_hdr.id = CONTROLVM_INVALID; |
75c1f8b7 | 1376 | } |
12e364b9 | 1377 | |
8f1947ac | 1378 | down(¬ifier_lock); |
12e364b9 KC |
1379 | if (response >= 0) { |
1380 | switch (cmd) { | |
1381 | case CONTROLVM_DEVICE_CREATE: | |
1382 | if (notifiers->device_create) { | |
2836c6a8 | 1383 | (*notifiers->device_create) (bus_no, dev_no); |
f4c11551 | 1384 | notified = true; |
12e364b9 KC |
1385 | } |
1386 | break; | |
1387 | case CONTROLVM_DEVICE_CHANGESTATE: | |
1388 | /* ServerReady / ServerRunning / SegmentStateRunning */ | |
bd0d2dcc BR |
1389 | if (state.alive == segment_state_running.alive && |
1390 | state.operating == | |
1391 | segment_state_running.operating) { | |
12e364b9 | 1392 | if (notifiers->device_resume) { |
2836c6a8 BR |
1393 | (*notifiers->device_resume) (bus_no, |
1394 | dev_no); | |
f4c11551 | 1395 | notified = true; |
12e364b9 KC |
1396 | } |
1397 | } | |
1398 | /* ServerNotReady / ServerLost / SegmentStateStandby */ | |
bd0d2dcc | 1399 | else if (state.alive == segment_state_standby.alive && |
3f833b54 | 1400 | state.operating == |
bd0d2dcc | 1401 | segment_state_standby.operating) { |
12e364b9 KC |
1402 | /* technically this is standby case |
1403 | * where server is lost | |
1404 | */ | |
1405 | if (notifiers->device_pause) { | |
2836c6a8 BR |
1406 | (*notifiers->device_pause) (bus_no, |
1407 | dev_no); | |
f4c11551 | 1408 | notified = true; |
12e364b9 | 1409 | } |
bd0d2dcc | 1410 | } else if (state.alive == segment_state_paused.alive && |
3f833b54 | 1411 | state.operating == |
bd0d2dcc | 1412 | segment_state_paused.operating) { |
12e364b9 KC |
1413 | /* this is lite pause where channel is |
1414 | * still valid just 'pause' of it | |
1415 | */ | |
2836c6a8 BR |
1416 | if (bus_no == g_diagpool_bus_no && |
1417 | dev_no == g_diagpool_dev_no) { | |
12e364b9 KC |
1418 | /* this will trigger the |
1419 | * diag_shutdown.sh script in | |
1420 | * the visorchipset hotplug */ | |
1421 | kobject_uevent_env | |
eb34e877 | 1422 | (&visorchipset_platform_device.dev. |
12e364b9 KC |
1423 | kobj, KOBJ_ONLINE, envp); |
1424 | } | |
1425 | } | |
1426 | break; | |
1427 | case CONTROLVM_DEVICE_DESTROY: | |
1428 | if (notifiers->device_destroy) { | |
2836c6a8 | 1429 | (*notifiers->device_destroy) (bus_no, dev_no); |
f4c11551 | 1430 | notified = true; |
12e364b9 KC |
1431 | } |
1432 | break; | |
1433 | } | |
1434 | } | |
1435 | if (notified) | |
1436 | /* The callback function just called above is responsible | |
929aa8ae | 1437 | * for calling the appropriate visorchipset_busdev_responders |
12e364b9 KC |
1438 | * function, which will call device_responder() |
1439 | */ | |
1440 | ; | |
1441 | else | |
2836c6a8 | 1442 | device_responder(cmd, bus_no, dev_no, response); |
8f1947ac | 1443 | up(¬ifier_lock); |
12e364b9 KC |
1444 | } |
1445 | ||
1446 | static void | |
3ab47701 | 1447 | bus_create(struct controlvm_message *inmsg) |
12e364b9 | 1448 | { |
2ea5117b | 1449 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1450 | u32 bus_no = cmd->create_bus.bus_no; |
12e364b9 | 1451 | int rc = CONTROLVM_RESP_SUCCESS; |
e82ba62e | 1452 | struct visorchipset_bus_info *bus_info; |
12e364b9 | 1453 | |
4f66520b | 1454 | bus_info = bus_find(&bus_info_list, bus_no); |
6c5fed35 BR |
1455 | if (bus_info && (bus_info->state.created == 1)) { |
1456 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1457 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1458 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
6c5fed35 | 1459 | goto cleanup; |
12e364b9 | 1460 | } |
6c5fed35 BR |
1461 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
1462 | if (!bus_info) { | |
1463 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, bus_no, | |
12e364b9 | 1464 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1465 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
6c5fed35 | 1466 | goto cleanup; |
12e364b9 KC |
1467 | } |
1468 | ||
6c5fed35 BR |
1469 | INIT_LIST_HEAD(&bus_info->entry); |
1470 | bus_info->bus_no = bus_no; | |
12e364b9 | 1471 | |
6c5fed35 | 1472 | POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1473 | |
98d7b594 | 1474 | if (inmsg->hdr.flags.test_message == 1) |
6c5fed35 | 1475 | bus_info->chan_info.addr_type = ADDRTYPE_LOCALTEST; |
12e364b9 | 1476 | else |
6c5fed35 | 1477 | bus_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL; |
12e364b9 | 1478 | |
6c5fed35 BR |
1479 | bus_info->flags.server = inmsg->hdr.flags.server; |
1480 | bus_info->chan_info.channel_addr = cmd->create_bus.channel_addr; | |
1481 | bus_info->chan_info.n_channel_bytes = cmd->create_bus.channel_bytes; | |
1482 | bus_info->chan_info.channel_type_uuid = | |
9b1caee7 | 1483 | cmd->create_bus.bus_data_type_uuid; |
6c5fed35 | 1484 | bus_info->chan_info.channel_inst_uuid = cmd->create_bus.bus_inst_uuid; |
12e364b9 | 1485 | |
6c5fed35 | 1486 | list_add(&bus_info->entry, &bus_info_list); |
12e364b9 | 1487 | |
6c5fed35 | 1488 | POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO); |
12e364b9 | 1489 | |
6c5fed35 BR |
1490 | cleanup: |
1491 | bus_epilog(bus_no, CONTROLVM_BUS_CREATE, &inmsg->hdr, | |
98d7b594 | 1492 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1493 | } |
1494 | ||
1495 | static void | |
3ab47701 | 1496 | bus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1497 | { |
2ea5117b | 1498 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca | 1499 | u32 bus_no = cmd->destroy_bus.bus_no; |
dff54cd6 | 1500 | struct visorchipset_bus_info *bus_info; |
12e364b9 KC |
1501 | int rc = CONTROLVM_RESP_SUCCESS; |
1502 | ||
4f66520b | 1503 | bus_info = bus_find(&bus_info_list, bus_no); |
dff54cd6 | 1504 | if (!bus_info) |
22ad57ba | 1505 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
dff54cd6 | 1506 | else if (bus_info->state.created == 0) |
22ad57ba | 1507 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1508 | |
dff54cd6 | 1509 | bus_epilog(bus_no, CONTROLVM_BUS_DESTROY, &inmsg->hdr, |
98d7b594 | 1510 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1511 | } |
1512 | ||
1513 | static void | |
317d9614 BR |
1514 | bus_configure(struct controlvm_message *inmsg, |
1515 | struct parser_context *parser_ctx) | |
12e364b9 | 1516 | { |
2ea5117b | 1517 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e JS |
1518 | u32 bus_no; |
1519 | struct visorchipset_bus_info *bus_info; | |
12e364b9 KC |
1520 | int rc = CONTROLVM_RESP_SUCCESS; |
1521 | char s[99]; | |
1522 | ||
654bada0 BR |
1523 | bus_no = cmd->configure_bus.bus_no; |
1524 | POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, bus_no, | |
1525 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1526 | |
4f66520b | 1527 | bus_info = bus_find(&bus_info_list, bus_no); |
654bada0 BR |
1528 | if (!bus_info) { |
1529 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1530 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1531 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1532 | } else if (bus_info->state.created == 0) { |
1533 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1534 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1535 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
654bada0 BR |
1536 | } else if (bus_info->pending_msg_hdr.id != CONTROLVM_INVALID) { |
1537 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, bus_no, | |
12e364b9 | 1538 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1539 | rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; |
654bada0 BR |
1540 | } else { |
1541 | bus_info->partition_handle = cmd->configure_bus.guest_handle; | |
1542 | bus_info->partition_uuid = parser_id_get(parser_ctx); | |
1543 | parser_param_start(parser_ctx, PARSERSTRING_NAME); | |
1544 | bus_info->name = parser_string_get(parser_ctx); | |
1545 | ||
1546 | visorchannel_uuid_id(&bus_info->partition_uuid, s); | |
1547 | POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no, | |
1548 | POSTCODE_SEVERITY_INFO); | |
12e364b9 | 1549 | } |
654bada0 | 1550 | bus_epilog(bus_no, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, |
98d7b594 | 1551 | rc, inmsg->hdr.flags.response_expected == 1); |
12e364b9 KC |
1552 | } |
1553 | ||
1554 | static void | |
3ab47701 | 1555 | my_device_create(struct controlvm_message *inmsg) |
12e364b9 | 1556 | { |
2ea5117b | 1557 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1558 | u32 bus_no = cmd->create_device.bus_no; |
1559 | u32 dev_no = cmd->create_device.dev_no; | |
e82ba62e JS |
1560 | struct visorchipset_device_info *dev_info; |
1561 | struct visorchipset_bus_info *bus_info; | |
12e364b9 KC |
1562 | int rc = CONTROLVM_RESP_SUCCESS; |
1563 | ||
d480f6a2 | 1564 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
c60c8e26 BR |
1565 | if (dev_info && (dev_info->state.created == 1)) { |
1566 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1567 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1568 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
c60c8e26 | 1569 | goto cleanup; |
12e364b9 | 1570 | } |
4f66520b | 1571 | bus_info = bus_find(&bus_info_list, bus_no); |
c60c8e26 BR |
1572 | if (!bus_info) { |
1573 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1574 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1575 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1576 | goto cleanup; |
12e364b9 | 1577 | } |
c60c8e26 BR |
1578 | if (bus_info->state.created == 0) { |
1579 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1580 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1581 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
c60c8e26 | 1582 | goto cleanup; |
12e364b9 | 1583 | } |
c60c8e26 BR |
1584 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
1585 | if (!dev_info) { | |
1586 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1587 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1588 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
c60c8e26 | 1589 | goto cleanup; |
12e364b9 | 1590 | } |
97a84f12 | 1591 | |
c60c8e26 BR |
1592 | INIT_LIST_HEAD(&dev_info->entry); |
1593 | dev_info->bus_no = bus_no; | |
1594 | dev_info->dev_no = dev_no; | |
1595 | dev_info->dev_inst_uuid = cmd->create_device.dev_inst_uuid; | |
1596 | POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, | |
12e364b9 KC |
1597 | POSTCODE_SEVERITY_INFO); |
1598 | ||
98d7b594 | 1599 | if (inmsg->hdr.flags.test_message == 1) |
c60c8e26 | 1600 | dev_info->chan_info.addr_type = ADDRTYPE_LOCALTEST; |
12e364b9 | 1601 | else |
c60c8e26 BR |
1602 | dev_info->chan_info.addr_type = ADDRTYPE_LOCALPHYSICAL; |
1603 | dev_info->chan_info.channel_addr = cmd->create_device.channel_addr; | |
1604 | dev_info->chan_info.n_channel_bytes = cmd->create_device.channel_bytes; | |
1605 | dev_info->chan_info.channel_type_uuid = | |
9b1caee7 | 1606 | cmd->create_device.data_type_uuid; |
c60c8e26 BR |
1607 | dev_info->chan_info.intr = cmd->create_device.intr; |
1608 | list_add(&dev_info->entry, &dev_info_list); | |
1609 | POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, dev_no, bus_no, | |
12e364b9 | 1610 | POSTCODE_SEVERITY_INFO); |
c60c8e26 | 1611 | cleanup: |
12e364b9 | 1612 | /* get the bus and devNo for DiagPool channel */ |
c60c8e26 BR |
1613 | if (dev_info && |
1614 | is_diagpool_channel(dev_info->chan_info.channel_type_uuid)) { | |
1615 | g_diagpool_bus_no = bus_no; | |
1616 | g_diagpool_dev_no = dev_no; | |
12e364b9 | 1617 | } |
c60c8e26 | 1618 | device_epilog(bus_no, dev_no, segment_state_running, |
12e364b9 | 1619 | CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, |
4da3336c | 1620 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1621 | } |
1622 | ||
1623 | static void | |
3ab47701 | 1624 | my_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 1625 | { |
2ea5117b | 1626 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1627 | u32 bus_no = cmd->device_change_state.bus_no; |
1628 | u32 dev_no = cmd->device_change_state.dev_no; | |
2ea5117b | 1629 | struct spar_segment_state state = cmd->device_change_state.state; |
e82ba62e | 1630 | struct visorchipset_device_info *dev_info; |
12e364b9 KC |
1631 | int rc = CONTROLVM_RESP_SUCCESS; |
1632 | ||
d480f6a2 | 1633 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
0278a905 BR |
1634 | if (!dev_info) { |
1635 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1636 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1637 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
0278a905 BR |
1638 | } else if (dev_info->state.created == 0) { |
1639 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no, | |
12e364b9 | 1640 | POSTCODE_SEVERITY_ERR); |
22ad57ba | 1641 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
12e364b9 | 1642 | } |
0278a905 BR |
1643 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
1644 | device_epilog(bus_no, dev_no, state, | |
1645 | CONTROLVM_DEVICE_CHANGESTATE, &inmsg->hdr, rc, | |
4da3336c | 1646 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1647 | } |
1648 | ||
1649 | static void | |
3ab47701 | 1650 | my_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 1651 | { |
2ea5117b | 1652 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
52063eca JS |
1653 | u32 bus_no = cmd->destroy_device.bus_no; |
1654 | u32 dev_no = cmd->destroy_device.dev_no; | |
e82ba62e | 1655 | struct visorchipset_device_info *dev_info; |
12e364b9 KC |
1656 | int rc = CONTROLVM_RESP_SUCCESS; |
1657 | ||
d480f6a2 | 1658 | dev_info = device_find(&dev_info_list, bus_no, dev_no); |
61715c8b | 1659 | if (!dev_info) |
22ad57ba | 1660 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
61715c8b | 1661 | else if (dev_info->state.created == 0) |
22ad57ba | 1662 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
12e364b9 | 1663 | |
61715c8b BR |
1664 | if ((rc >= CONTROLVM_RESP_SUCCESS) && dev_info) |
1665 | device_epilog(bus_no, dev_no, segment_state_running, | |
12e364b9 | 1666 | CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, |
4da3336c | 1667 | inmsg->hdr.flags.response_expected == 1, 1); |
12e364b9 KC |
1668 | } |
1669 | ||
1670 | /* When provided with the physical address of the controlvm channel | |
1671 | * (phys_addr), the offset to the payload area we need to manage | |
1672 | * (offset), and the size of this payload area (bytes), fills in the | |
f4c11551 | 1673 | * controlvm_payload_info struct. Returns true for success or false |
12e364b9 KC |
1674 | * for failure. |
1675 | */ | |
1676 | static int | |
5fc0229a | 1677 | initialize_controlvm_payload_info(HOSTADDRESS phys_addr, u64 offset, u32 bytes, |
c1f834eb | 1678 | struct visor_controlvm_payload_info *info) |
12e364b9 | 1679 | { |
c242233e | 1680 | u8 __iomem *payload = NULL; |
12e364b9 KC |
1681 | int rc = CONTROLVM_RESP_SUCCESS; |
1682 | ||
38f736e9 | 1683 | if (!info) { |
22ad57ba | 1684 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1685 | goto cleanup; |
12e364b9 | 1686 | } |
c1f834eb | 1687 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 | 1688 | if ((offset == 0) || (bytes == 0)) { |
22ad57ba | 1689 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
f118a39b | 1690 | goto cleanup; |
12e364b9 KC |
1691 | } |
1692 | payload = ioremap_cache(phys_addr + offset, bytes); | |
38f736e9 | 1693 | if (!payload) { |
22ad57ba | 1694 | rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; |
f118a39b | 1695 | goto cleanup; |
12e364b9 KC |
1696 | } |
1697 | ||
1698 | info->offset = offset; | |
1699 | info->bytes = bytes; | |
1700 | info->ptr = payload; | |
12e364b9 | 1701 | |
f118a39b | 1702 | cleanup: |
12e364b9 | 1703 | if (rc < 0) { |
f118a39b | 1704 | if (payload) { |
12e364b9 KC |
1705 | iounmap(payload); |
1706 | payload = NULL; | |
1707 | } | |
1708 | } | |
1709 | return rc; | |
1710 | } | |
1711 | ||
1712 | static void | |
c1f834eb | 1713 | destroy_controlvm_payload_info(struct visor_controlvm_payload_info *info) |
12e364b9 | 1714 | { |
597c338f | 1715 | if (info->ptr) { |
12e364b9 KC |
1716 | iounmap(info->ptr); |
1717 | info->ptr = NULL; | |
1718 | } | |
c1f834eb | 1719 | memset(info, 0, sizeof(struct visor_controlvm_payload_info)); |
12e364b9 KC |
1720 | } |
1721 | ||
1722 | static void | |
1723 | initialize_controlvm_payload(void) | |
1724 | { | |
c3d9a224 | 1725 | HOSTADDRESS phys_addr = visorchannel_get_physaddr(controlvm_channel); |
cafefc0c BR |
1726 | u64 payload_offset = 0; |
1727 | u32 payload_bytes = 0; | |
26eb2c0c | 1728 | |
c3d9a224 | 1729 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1730 | offsetof(struct spar_controlvm_channel_protocol, |
1731 | request_payload_offset), | |
cafefc0c | 1732 | &payload_offset, sizeof(payload_offset)) < 0) { |
12e364b9 KC |
1733 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1734 | POSTCODE_SEVERITY_ERR); | |
1735 | return; | |
1736 | } | |
c3d9a224 | 1737 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
1738 | offsetof(struct spar_controlvm_channel_protocol, |
1739 | request_payload_bytes), | |
cafefc0c | 1740 | &payload_bytes, sizeof(payload_bytes)) < 0) { |
12e364b9 KC |
1741 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
1742 | POSTCODE_SEVERITY_ERR); | |
1743 | return; | |
1744 | } | |
1745 | initialize_controlvm_payload_info(phys_addr, | |
cafefc0c | 1746 | payload_offset, payload_bytes, |
84982fbf | 1747 | &controlvm_payload_info); |
12e364b9 KC |
1748 | } |
1749 | ||
1750 | /* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1751 | * Returns CONTROLVM_RESP_xxx code. | |
1752 | */ | |
1753 | int | |
1754 | visorchipset_chipset_ready(void) | |
1755 | { | |
eb34e877 | 1756 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); |
12e364b9 KC |
1757 | return CONTROLVM_RESP_SUCCESS; |
1758 | } | |
1759 | EXPORT_SYMBOL_GPL(visorchipset_chipset_ready); | |
1760 | ||
1761 | int | |
1762 | visorchipset_chipset_selftest(void) | |
1763 | { | |
1764 | char env_selftest[20]; | |
1765 | char *envp[] = { env_selftest, NULL }; | |
26eb2c0c | 1766 | |
12e364b9 | 1767 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); |
eb34e877 | 1768 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1769 | envp); |
1770 | return CONTROLVM_RESP_SUCCESS; | |
1771 | } | |
1772 | EXPORT_SYMBOL_GPL(visorchipset_chipset_selftest); | |
1773 | ||
1774 | /* Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1775 | * Returns CONTROLVM_RESP_xxx code. | |
1776 | */ | |
1777 | int | |
1778 | visorchipset_chipset_notready(void) | |
1779 | { | |
eb34e877 | 1780 | kobject_uevent(&visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); |
12e364b9 KC |
1781 | return CONTROLVM_RESP_SUCCESS; |
1782 | } | |
1783 | EXPORT_SYMBOL_GPL(visorchipset_chipset_notready); | |
1784 | ||
1785 | static void | |
77a0449d | 1786 | chipset_ready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1787 | { |
1788 | int rc = visorchipset_chipset_ready(); | |
26eb2c0c | 1789 | |
12e364b9 KC |
1790 | if (rc != CONTROLVM_RESP_SUCCESS) |
1791 | rc = -rc; | |
77a0449d BR |
1792 | if (msg_hdr->flags.response_expected && !visorchipset_holdchipsetready) |
1793 | controlvm_respond(msg_hdr, rc); | |
1794 | if (msg_hdr->flags.response_expected && visorchipset_holdchipsetready) { | |
12e364b9 KC |
1795 | /* Send CHIPSET_READY response when all modules have been loaded |
1796 | * and disks mounted for the partition | |
1797 | */ | |
77a0449d | 1798 | g_chipset_msg_hdr = *msg_hdr; |
12e364b9 KC |
1799 | } |
1800 | } | |
1801 | ||
1802 | static void | |
77a0449d | 1803 | chipset_selftest(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1804 | { |
1805 | int rc = visorchipset_chipset_selftest(); | |
26eb2c0c | 1806 | |
12e364b9 KC |
1807 | if (rc != CONTROLVM_RESP_SUCCESS) |
1808 | rc = -rc; | |
77a0449d BR |
1809 | if (msg_hdr->flags.response_expected) |
1810 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1811 | } |
1812 | ||
1813 | static void | |
77a0449d | 1814 | chipset_notready(struct controlvm_message_header *msg_hdr) |
12e364b9 KC |
1815 | { |
1816 | int rc = visorchipset_chipset_notready(); | |
26eb2c0c | 1817 | |
12e364b9 KC |
1818 | if (rc != CONTROLVM_RESP_SUCCESS) |
1819 | rc = -rc; | |
77a0449d BR |
1820 | if (msg_hdr->flags.response_expected) |
1821 | controlvm_respond(msg_hdr, rc); | |
12e364b9 KC |
1822 | } |
1823 | ||
1824 | /* This is your "one-stop" shop for grabbing the next message from the | |
1825 | * CONTROLVM_QUEUE_EVENT queue in the controlvm channel. | |
1826 | */ | |
f4c11551 | 1827 | static bool |
3ab47701 | 1828 | read_controlvm_event(struct controlvm_message *msg) |
12e364b9 | 1829 | { |
c3d9a224 | 1830 | if (visorchannel_signalremove(controlvm_channel, |
12e364b9 KC |
1831 | CONTROLVM_QUEUE_EVENT, msg)) { |
1832 | /* got a message */ | |
0aca7844 | 1833 | if (msg->hdr.flags.test_message == 1) |
f4c11551 JS |
1834 | return false; |
1835 | return true; | |
12e364b9 | 1836 | } |
f4c11551 | 1837 | return false; |
12e364b9 KC |
1838 | } |
1839 | ||
1840 | /* | |
1841 | * The general parahotplug flow works as follows. The visorchipset | |
1842 | * driver receives a DEVICE_CHANGESTATE message from Command | |
1843 | * specifying a physical device to enable or disable. The CONTROLVM | |
1844 | * message handler calls parahotplug_process_message, which then adds | |
1845 | * the message to a global list and kicks off a udev event which | |
1846 | * causes a user level script to enable or disable the specified | |
1847 | * device. The udev script then writes to | |
1848 | * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write | |
1849 | * to get called, at which point the appropriate CONTROLVM message is | |
1850 | * retrieved from the list and responded to. | |
1851 | */ | |
1852 | ||
1853 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
1854 | ||
1855 | /* | |
1856 | * Generate unique int to match an outstanding CONTROLVM message with a | |
1857 | * udev script /proc response | |
1858 | */ | |
1859 | static int | |
1860 | parahotplug_next_id(void) | |
1861 | { | |
1862 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 1863 | |
12e364b9 KC |
1864 | return atomic_inc_return(&id); |
1865 | } | |
1866 | ||
1867 | /* | |
1868 | * Returns the time (in jiffies) when a CONTROLVM message on the list | |
1869 | * should expire -- PARAHOTPLUG_TIMEOUT_MS in the future | |
1870 | */ | |
1871 | static unsigned long | |
1872 | parahotplug_next_expiration(void) | |
1873 | { | |
2cc1a1b3 | 1874 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
1875 | } |
1876 | ||
1877 | /* | |
1878 | * Create a parahotplug_request, which is basically a wrapper for a | |
1879 | * CONTROLVM_MESSAGE that we can stick on a list | |
1880 | */ | |
1881 | static struct parahotplug_request * | |
3ab47701 | 1882 | parahotplug_request_create(struct controlvm_message *msg) |
12e364b9 | 1883 | { |
ea0dcfcf QL |
1884 | struct parahotplug_request *req; |
1885 | ||
6a55e3c3 | 1886 | req = kmalloc(sizeof(*req), GFP_KERNEL | __GFP_NORETRY); |
38f736e9 | 1887 | if (!req) |
12e364b9 KC |
1888 | return NULL; |
1889 | ||
1890 | req->id = parahotplug_next_id(); | |
1891 | req->expiration = parahotplug_next_expiration(); | |
1892 | req->msg = *msg; | |
1893 | ||
1894 | return req; | |
1895 | } | |
1896 | ||
1897 | /* | |
1898 | * Free a parahotplug_request. | |
1899 | */ | |
1900 | static void | |
1901 | parahotplug_request_destroy(struct parahotplug_request *req) | |
1902 | { | |
1903 | kfree(req); | |
1904 | } | |
1905 | ||
1906 | /* | |
1907 | * Cause uevent to run the user level script to do the disable/enable | |
1908 | * specified in (the CONTROLVM message in) the specified | |
1909 | * parahotplug_request | |
1910 | */ | |
1911 | static void | |
1912 | parahotplug_request_kickoff(struct parahotplug_request *req) | |
1913 | { | |
2ea5117b | 1914 | struct controlvm_message_packet *cmd = &req->msg.cmd; |
12e364b9 KC |
1915 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], |
1916 | env_func[40]; | |
1917 | char *envp[] = { | |
1918 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1919 | }; | |
1920 | ||
1921 | sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); | |
1922 | sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); | |
1923 | sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", | |
2ea5117b | 1924 | cmd->device_change_state.state.active); |
12e364b9 | 1925 | sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", |
2ea5117b | 1926 | cmd->device_change_state.bus_no); |
12e364b9 | 1927 | sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", |
2ea5117b | 1928 | cmd->device_change_state.dev_no >> 3); |
12e364b9 | 1929 | sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", |
2ea5117b | 1930 | cmd->device_change_state.dev_no & 0x7); |
12e364b9 | 1931 | |
eb34e877 | 1932 | kobject_uevent_env(&visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
12e364b9 KC |
1933 | envp); |
1934 | } | |
1935 | ||
1936 | /* | |
1937 | * Remove any request from the list that's been on there too long and | |
1938 | * respond with an error. | |
1939 | */ | |
1940 | static void | |
1941 | parahotplug_process_list(void) | |
1942 | { | |
e82ba62e JS |
1943 | struct list_head *pos; |
1944 | struct list_head *tmp; | |
12e364b9 | 1945 | |
ddf5de53 | 1946 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 | 1947 | |
ddf5de53 | 1948 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1949 | struct parahotplug_request *req = |
1950 | list_entry(pos, struct parahotplug_request, list); | |
55b33413 BR |
1951 | |
1952 | if (!time_after_eq(jiffies, req->expiration)) | |
1953 | continue; | |
1954 | ||
1955 | list_del(pos); | |
1956 | if (req->msg.hdr.flags.response_expected) | |
1957 | controlvm_respond_physdev_changestate( | |
1958 | &req->msg.hdr, | |
1959 | CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, | |
1960 | req->msg.cmd.device_change_state.state); | |
1961 | parahotplug_request_destroy(req); | |
12e364b9 KC |
1962 | } |
1963 | ||
ddf5de53 | 1964 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
1965 | } |
1966 | ||
1967 | /* | |
1968 | * Called from the /proc handler, which means the user script has | |
1969 | * finished the enable/disable. Find the matching identifier, and | |
1970 | * respond to the CONTROLVM message with success. | |
1971 | */ | |
1972 | static int | |
b06bdf7d | 1973 | parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1974 | { |
e82ba62e JS |
1975 | struct list_head *pos; |
1976 | struct list_head *tmp; | |
12e364b9 | 1977 | |
ddf5de53 | 1978 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1979 | |
1980 | /* Look for a request matching "id". */ | |
ddf5de53 | 1981 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1982 | struct parahotplug_request *req = |
1983 | list_entry(pos, struct parahotplug_request, list); | |
1984 | if (req->id == id) { | |
1985 | /* Found a match. Remove it from the list and | |
1986 | * respond. | |
1987 | */ | |
1988 | list_del(pos); | |
ddf5de53 | 1989 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1990 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1991 | if (req->msg.hdr.flags.response_expected) |
12e364b9 KC |
1992 | controlvm_respond_physdev_changestate( |
1993 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
2ea5117b | 1994 | req->msg.cmd.device_change_state.state); |
12e364b9 KC |
1995 | parahotplug_request_destroy(req); |
1996 | return 0; | |
1997 | } | |
1998 | } | |
1999 | ||
ddf5de53 | 2000 | spin_unlock(¶hotplug_request_list_lock); |
12e364b9 KC |
2001 | return -1; |
2002 | } | |
2003 | ||
2004 | /* | |
2005 | * Enables or disables a PCI device by kicking off a udev script | |
2006 | */ | |
bd5b9b32 | 2007 | static void |
3ab47701 | 2008 | parahotplug_process_message(struct controlvm_message *inmsg) |
12e364b9 KC |
2009 | { |
2010 | struct parahotplug_request *req; | |
2011 | ||
2012 | req = parahotplug_request_create(inmsg); | |
2013 | ||
38f736e9 | 2014 | if (!req) |
12e364b9 | 2015 | return; |
12e364b9 | 2016 | |
2ea5117b | 2017 | if (inmsg->cmd.device_change_state.state.active) { |
12e364b9 KC |
2018 | /* For enable messages, just respond with success |
2019 | * right away. This is a bit of a hack, but there are | |
2020 | * issues with the early enable messages we get (with | |
2021 | * either the udev script not detecting that the device | |
2022 | * is up, or not getting called at all). Fortunately | |
2023 | * the messages that get lost don't matter anyway, as | |
2024 | * devices are automatically enabled at | |
2025 | * initialization. | |
2026 | */ | |
2027 | parahotplug_request_kickoff(req); | |
2028 | controlvm_respond_physdev_changestate(&inmsg->hdr, | |
8e76e695 BR |
2029 | CONTROLVM_RESP_SUCCESS, |
2030 | inmsg->cmd.device_change_state.state); | |
12e364b9 KC |
2031 | parahotplug_request_destroy(req); |
2032 | } else { | |
2033 | /* For disable messages, add the request to the | |
2034 | * request list before kicking off the udev script. It | |
2035 | * won't get responded to until the script has | |
2036 | * indicated it's done. | |
2037 | */ | |
ddf5de53 BR |
2038 | spin_lock(¶hotplug_request_list_lock); |
2039 | list_add_tail(&req->list, ¶hotplug_request_list); | |
2040 | spin_unlock(¶hotplug_request_list_lock); | |
12e364b9 KC |
2041 | |
2042 | parahotplug_request_kickoff(req); | |
2043 | } | |
2044 | } | |
2045 | ||
12e364b9 KC |
2046 | /* Process a controlvm message. |
2047 | * Return result: | |
779d0752 | 2048 | * false - this function will return false only in the case where the |
12e364b9 KC |
2049 | * controlvm message was NOT processed, but processing must be |
2050 | * retried before reading the next controlvm message; a | |
2051 | * scenario where this can occur is when we need to throttle | |
2052 | * the allocation of memory in which to copy out controlvm | |
2053 | * payload data | |
f4c11551 | 2054 | * true - processing of the controlvm message completed, |
12e364b9 KC |
2055 | * either successfully or with an error. |
2056 | */ | |
f4c11551 | 2057 | static bool |
3ab47701 | 2058 | handle_command(struct controlvm_message inmsg, HOSTADDRESS channel_addr) |
12e364b9 | 2059 | { |
2ea5117b | 2060 | struct controlvm_message_packet *cmd = &inmsg.cmd; |
e82ba62e JS |
2061 | u64 parm_addr; |
2062 | u32 parm_bytes; | |
317d9614 | 2063 | struct parser_context *parser_ctx = NULL; |
e82ba62e | 2064 | bool local_addr; |
3ab47701 | 2065 | struct controlvm_message ackmsg; |
12e364b9 KC |
2066 | |
2067 | /* create parsing context if necessary */ | |
818352a8 | 2068 | local_addr = (inmsg.hdr.flags.test_message == 1); |
0aca7844 | 2069 | if (channel_addr == 0) |
f4c11551 | 2070 | return true; |
818352a8 BR |
2071 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; |
2072 | parm_bytes = inmsg.hdr.payload_bytes; | |
12e364b9 KC |
2073 | |
2074 | /* Parameter and channel addresses within test messages actually lie | |
2075 | * within our OS-controlled memory. We need to know that, because it | |
2076 | * makes a difference in how we compute the virtual address. | |
2077 | */ | |
ebec8967 | 2078 | if (parm_addr && parm_bytes) { |
f4c11551 | 2079 | bool retry = false; |
26eb2c0c | 2080 | |
12e364b9 | 2081 | parser_ctx = |
818352a8 BR |
2082 | parser_init_byte_stream(parm_addr, parm_bytes, |
2083 | local_addr, &retry); | |
1b08872e | 2084 | if (!parser_ctx && retry) |
f4c11551 | 2085 | return false; |
12e364b9 KC |
2086 | } |
2087 | ||
818352a8 | 2088 | if (!local_addr) { |
12e364b9 KC |
2089 | controlvm_init_response(&ackmsg, &inmsg.hdr, |
2090 | CONTROLVM_RESP_SUCCESS); | |
c3d9a224 BR |
2091 | if (controlvm_channel) |
2092 | visorchannel_signalinsert(controlvm_channel, | |
1b08872e BR |
2093 | CONTROLVM_QUEUE_ACK, |
2094 | &ackmsg); | |
12e364b9 | 2095 | } |
98d7b594 | 2096 | switch (inmsg.hdr.id) { |
12e364b9 | 2097 | case CONTROLVM_CHIPSET_INIT: |
12e364b9 KC |
2098 | chipset_init(&inmsg); |
2099 | break; | |
2100 | case CONTROLVM_BUS_CREATE: | |
12e364b9 KC |
2101 | bus_create(&inmsg); |
2102 | break; | |
2103 | case CONTROLVM_BUS_DESTROY: | |
12e364b9 KC |
2104 | bus_destroy(&inmsg); |
2105 | break; | |
2106 | case CONTROLVM_BUS_CONFIGURE: | |
12e364b9 KC |
2107 | bus_configure(&inmsg, parser_ctx); |
2108 | break; | |
2109 | case CONTROLVM_DEVICE_CREATE: | |
12e364b9 KC |
2110 | my_device_create(&inmsg); |
2111 | break; | |
2112 | case CONTROLVM_DEVICE_CHANGESTATE: | |
2ea5117b | 2113 | if (cmd->device_change_state.flags.phys_device) { |
12e364b9 KC |
2114 | parahotplug_process_message(&inmsg); |
2115 | } else { | |
12e364b9 KC |
2116 | /* save the hdr and cmd structures for later use */ |
2117 | /* when sending back the response to Command */ | |
2118 | my_device_changestate(&inmsg); | |
4f44b72d | 2119 | g_devicechangestate_packet = inmsg.cmd; |
12e364b9 KC |
2120 | break; |
2121 | } | |
2122 | break; | |
2123 | case CONTROLVM_DEVICE_DESTROY: | |
12e364b9 KC |
2124 | my_device_destroy(&inmsg); |
2125 | break; | |
2126 | case CONTROLVM_DEVICE_CONFIGURE: | |
12e364b9 | 2127 | /* no op for now, just send a respond that we passed */ |
98d7b594 | 2128 | if (inmsg.hdr.flags.response_expected) |
12e364b9 KC |
2129 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); |
2130 | break; | |
2131 | case CONTROLVM_CHIPSET_READY: | |
12e364b9 KC |
2132 | chipset_ready(&inmsg.hdr); |
2133 | break; | |
2134 | case CONTROLVM_CHIPSET_SELFTEST: | |
12e364b9 KC |
2135 | chipset_selftest(&inmsg.hdr); |
2136 | break; | |
2137 | case CONTROLVM_CHIPSET_STOP: | |
12e364b9 KC |
2138 | chipset_notready(&inmsg.hdr); |
2139 | break; | |
2140 | default: | |
98d7b594 | 2141 | if (inmsg.hdr.flags.response_expected) |
12e364b9 | 2142 | controlvm_respond(&inmsg.hdr, |
818352a8 | 2143 | -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); |
12e364b9 KC |
2144 | break; |
2145 | } | |
2146 | ||
38f736e9 | 2147 | if (parser_ctx) { |
12e364b9 KC |
2148 | parser_done(parser_ctx); |
2149 | parser_ctx = NULL; | |
2150 | } | |
f4c11551 | 2151 | return true; |
12e364b9 KC |
2152 | } |
2153 | ||
d746cb55 | 2154 | static HOSTADDRESS controlvm_get_channel_address(void) |
524b0b63 | 2155 | { |
5fc0229a | 2156 | u64 addr = 0; |
b3c55b13 | 2157 | u32 size = 0; |
524b0b63 | 2158 | |
0aca7844 | 2159 | if (!VMCALL_SUCCESSFUL(issue_vmcall_io_controlvm_addr(&addr, &size))) |
524b0b63 | 2160 | return 0; |
0aca7844 | 2161 | |
524b0b63 BR |
2162 | return addr; |
2163 | } | |
2164 | ||
12e364b9 KC |
2165 | static void |
2166 | controlvm_periodic_work(struct work_struct *work) | |
2167 | { | |
3ab47701 | 2168 | struct controlvm_message inmsg; |
f4c11551 JS |
2169 | bool got_command = false; |
2170 | bool handle_command_failed = false; | |
1c1ed292 | 2171 | static u64 poll_count; |
12e364b9 KC |
2172 | |
2173 | /* make sure visorbus server is registered for controlvm callbacks */ | |
4da3336c | 2174 | if (visorchipset_visorbusregwait && !visorbusregistered) |
1c1ed292 | 2175 | goto cleanup; |
12e364b9 | 2176 | |
1c1ed292 BR |
2177 | poll_count++; |
2178 | if (poll_count >= 250) | |
12e364b9 KC |
2179 | ; /* keep going */ |
2180 | else | |
1c1ed292 | 2181 | goto cleanup; |
12e364b9 KC |
2182 | |
2183 | /* Check events to determine if response to CHIPSET_READY | |
2184 | * should be sent | |
2185 | */ | |
0639ba67 BR |
2186 | if (visorchipset_holdchipsetready && |
2187 | (g_chipset_msg_hdr.id != CONTROLVM_INVALID)) { | |
12e364b9 | 2188 | if (check_chipset_events() == 1) { |
da021f02 | 2189 | controlvm_respond(&g_chipset_msg_hdr, 0); |
12e364b9 | 2190 | clear_chipset_events(); |
da021f02 | 2191 | memset(&g_chipset_msg_hdr, 0, |
98d7b594 | 2192 | sizeof(struct controlvm_message_header)); |
12e364b9 KC |
2193 | } |
2194 | } | |
2195 | ||
c3d9a224 | 2196 | while (visorchannel_signalremove(controlvm_channel, |
8a1182eb | 2197 | CONTROLVM_QUEUE_RESPONSE, |
c3d9a224 BR |
2198 | &inmsg)) |
2199 | ; | |
1c1ed292 | 2200 | if (!got_command) { |
7166ed19 | 2201 | if (controlvm_pending_msg_valid) { |
8a1182eb BR |
2202 | /* we throttled processing of a prior |
2203 | * msg, so try to process it again | |
2204 | * rather than reading a new one | |
2205 | */ | |
7166ed19 | 2206 | inmsg = controlvm_pending_msg; |
f4c11551 | 2207 | controlvm_pending_msg_valid = false; |
1c1ed292 | 2208 | got_command = true; |
75c1f8b7 | 2209 | } else { |
1c1ed292 | 2210 | got_command = read_controlvm_event(&inmsg); |
75c1f8b7 | 2211 | } |
8a1182eb | 2212 | } |
12e364b9 | 2213 | |
f4c11551 | 2214 | handle_command_failed = false; |
1c1ed292 | 2215 | while (got_command && (!handle_command_failed)) { |
b53e0e93 | 2216 | most_recent_message_jiffies = jiffies; |
8a1182eb BR |
2217 | if (handle_command(inmsg, |
2218 | visorchannel_get_physaddr | |
c3d9a224 | 2219 | (controlvm_channel))) |
1c1ed292 | 2220 | got_command = read_controlvm_event(&inmsg); |
8a1182eb BR |
2221 | else { |
2222 | /* this is a scenario where throttling | |
2223 | * is required, but probably NOT an | |
2224 | * error...; we stash the current | |
2225 | * controlvm msg so we will attempt to | |
2226 | * reprocess it on our next loop | |
2227 | */ | |
f4c11551 | 2228 | handle_command_failed = true; |
7166ed19 | 2229 | controlvm_pending_msg = inmsg; |
f4c11551 | 2230 | controlvm_pending_msg_valid = true; |
12e364b9 KC |
2231 | } |
2232 | } | |
2233 | ||
2234 | /* parahotplug_worker */ | |
2235 | parahotplug_process_list(); | |
2236 | ||
1c1ed292 | 2237 | cleanup: |
12e364b9 KC |
2238 | |
2239 | if (time_after(jiffies, | |
b53e0e93 | 2240 | most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { |
12e364b9 KC |
2241 | /* it's been longer than MIN_IDLE_SECONDS since we |
2242 | * processed our last controlvm message; slow down the | |
2243 | * polling | |
2244 | */ | |
911e213e BR |
2245 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) |
2246 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
12e364b9 | 2247 | } else { |
911e213e BR |
2248 | if (poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) |
2249 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
12e364b9 KC |
2250 | } |
2251 | ||
9232d2d6 BR |
2252 | queue_delayed_work(periodic_controlvm_workqueue, |
2253 | &periodic_controlvm_work, poll_jiffies); | |
12e364b9 KC |
2254 | } |
2255 | ||
2256 | static void | |
2257 | setup_crash_devices_work_queue(struct work_struct *work) | |
2258 | { | |
e6bdb904 BR |
2259 | struct controlvm_message local_crash_bus_msg; |
2260 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 2261 | struct controlvm_message msg; |
e6bdb904 BR |
2262 | u32 local_crash_msg_offset; |
2263 | u16 local_crash_msg_count; | |
12e364b9 | 2264 | |
4da3336c DK |
2265 | /* make sure visorbus is registered for controlvm callbacks */ |
2266 | if (visorchipset_visorbusregwait && !visorbusregistered) | |
e6bdb904 | 2267 | goto cleanup; |
12e364b9 KC |
2268 | |
2269 | POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); | |
2270 | ||
2271 | /* send init chipset msg */ | |
98d7b594 | 2272 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
2273 | msg.cmd.init_chipset.bus_count = 23; |
2274 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
2275 | |
2276 | chipset_init(&msg); | |
2277 | ||
12e364b9 | 2278 | /* get saved message count */ |
c3d9a224 | 2279 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
2280 | offsetof(struct spar_controlvm_channel_protocol, |
2281 | saved_crash_message_count), | |
e6bdb904 | 2282 | &local_crash_msg_count, sizeof(u16)) < 0) { |
12e364b9 KC |
2283 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
2284 | POSTCODE_SEVERITY_ERR); | |
2285 | return; | |
2286 | } | |
2287 | ||
e6bdb904 | 2288 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
12e364b9 | 2289 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
e6bdb904 | 2290 | local_crash_msg_count, |
12e364b9 KC |
2291 | POSTCODE_SEVERITY_ERR); |
2292 | return; | |
2293 | } | |
2294 | ||
2295 | /* get saved crash message offset */ | |
c3d9a224 | 2296 | if (visorchannel_read(controlvm_channel, |
d19642f6 BR |
2297 | offsetof(struct spar_controlvm_channel_protocol, |
2298 | saved_crash_message_offset), | |
e6bdb904 | 2299 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
12e364b9 KC |
2300 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
2301 | POSTCODE_SEVERITY_ERR); | |
2302 | return; | |
2303 | } | |
2304 | ||
2305 | /* read create device message for storage bus offset */ | |
c3d9a224 | 2306 | if (visorchannel_read(controlvm_channel, |
e6bdb904 BR |
2307 | local_crash_msg_offset, |
2308 | &local_crash_bus_msg, | |
3ab47701 | 2309 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
2310 | POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, |
2311 | POSTCODE_SEVERITY_ERR); | |
2312 | return; | |
2313 | } | |
2314 | ||
2315 | /* read create device message for storage device */ | |
c3d9a224 | 2316 | if (visorchannel_read(controlvm_channel, |
e6bdb904 | 2317 | local_crash_msg_offset + |
3ab47701 | 2318 | sizeof(struct controlvm_message), |
e6bdb904 | 2319 | &local_crash_dev_msg, |
3ab47701 | 2320 | sizeof(struct controlvm_message)) < 0) { |
12e364b9 KC |
2321 | POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, |
2322 | POSTCODE_SEVERITY_ERR); | |
2323 | return; | |
2324 | } | |
2325 | ||
2326 | /* reuse IOVM create bus message */ | |
ebec8967 | 2327 | if (local_crash_bus_msg.cmd.create_bus.channel_addr) { |
e6bdb904 | 2328 | bus_create(&local_crash_bus_msg); |
75c1f8b7 | 2329 | } else { |
12e364b9 KC |
2330 | POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, |
2331 | POSTCODE_SEVERITY_ERR); | |
2332 | return; | |
2333 | } | |
2334 | ||
2335 | /* reuse create device message for storage device */ | |
ebec8967 | 2336 | if (local_crash_dev_msg.cmd.create_device.channel_addr) { |
e6bdb904 | 2337 | my_device_create(&local_crash_dev_msg); |
75c1f8b7 | 2338 | } else { |
12e364b9 KC |
2339 | POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, |
2340 | POSTCODE_SEVERITY_ERR); | |
2341 | return; | |
2342 | } | |
12e364b9 KC |
2343 | POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2344 | return; | |
2345 | ||
e6bdb904 | 2346 | cleanup: |
12e364b9 | 2347 | |
911e213e | 2348 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; |
12e364b9 | 2349 | |
9232d2d6 BR |
2350 | queue_delayed_work(periodic_controlvm_workqueue, |
2351 | &periodic_controlvm_work, poll_jiffies); | |
12e364b9 KC |
2352 | } |
2353 | ||
2354 | static void | |
52063eca | 2355 | bus_create_response(u32 bus_no, int response) |
12e364b9 | 2356 | { |
8e3fedd6 | 2357 | bus_responder(CONTROLVM_BUS_CREATE, bus_no, response); |
12e364b9 KC |
2358 | } |
2359 | ||
2360 | static void | |
52063eca | 2361 | bus_destroy_response(u32 bus_no, int response) |
12e364b9 | 2362 | { |
8e3fedd6 | 2363 | bus_responder(CONTROLVM_BUS_DESTROY, bus_no, response); |
12e364b9 KC |
2364 | } |
2365 | ||
2366 | static void | |
52063eca | 2367 | device_create_response(u32 bus_no, u32 dev_no, int response) |
12e364b9 | 2368 | { |
8e3fedd6 | 2369 | device_responder(CONTROLVM_DEVICE_CREATE, bus_no, dev_no, response); |
12e364b9 KC |
2370 | } |
2371 | ||
2372 | static void | |
52063eca | 2373 | device_destroy_response(u32 bus_no, u32 dev_no, int response) |
12e364b9 | 2374 | { |
8e3fedd6 | 2375 | device_responder(CONTROLVM_DEVICE_DESTROY, bus_no, dev_no, response); |
12e364b9 KC |
2376 | } |
2377 | ||
2378 | void | |
52063eca | 2379 | visorchipset_device_pause_response(u32 bus_no, u32 dev_no, int response) |
12e364b9 | 2380 | { |
12e364b9 | 2381 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
8420f417 | 2382 | bus_no, dev_no, response, |
bd0d2dcc | 2383 | segment_state_standby); |
12e364b9 | 2384 | } |
927c7927 | 2385 | EXPORT_SYMBOL_GPL(visorchipset_device_pause_response); |
12e364b9 KC |
2386 | |
2387 | static void | |
52063eca | 2388 | device_resume_response(u32 bus_no, u32 dev_no, int response) |
12e364b9 KC |
2389 | { |
2390 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
8e3fedd6 | 2391 | bus_no, dev_no, response, |
bd0d2dcc | 2392 | segment_state_running); |
12e364b9 KC |
2393 | } |
2394 | ||
f4c11551 | 2395 | bool |
52063eca | 2396 | visorchipset_get_bus_info(u32 bus_no, struct visorchipset_bus_info *bus_info) |
12e364b9 | 2397 | { |
4f66520b | 2398 | void *p = bus_find(&bus_info_list, bus_no); |
26eb2c0c | 2399 | |
0aca7844 | 2400 | if (!p) |
f4c11551 | 2401 | return false; |
77db7127 | 2402 | memcpy(bus_info, p, sizeof(struct visorchipset_bus_info)); |
f4c11551 | 2403 | return true; |
12e364b9 KC |
2404 | } |
2405 | EXPORT_SYMBOL_GPL(visorchipset_get_bus_info); | |
2406 | ||
f4c11551 | 2407 | bool |
52063eca | 2408 | visorchipset_set_bus_context(u32 bus_no, void *context) |
12e364b9 | 2409 | { |
4f66520b | 2410 | struct visorchipset_bus_info *p = bus_find(&bus_info_list, bus_no); |
26eb2c0c | 2411 | |
0aca7844 | 2412 | if (!p) |
f4c11551 | 2413 | return false; |
12e364b9 | 2414 | p->bus_driver_context = context; |
f4c11551 | 2415 | return true; |
12e364b9 KC |
2416 | } |
2417 | EXPORT_SYMBOL_GPL(visorchipset_set_bus_context); | |
2418 | ||
f4c11551 | 2419 | bool |
52063eca | 2420 | visorchipset_get_device_info(u32 bus_no, u32 dev_no, |
b486df19 | 2421 | struct visorchipset_device_info *dev_info) |
12e364b9 | 2422 | { |
d480f6a2 | 2423 | void *p = device_find(&dev_info_list, bus_no, dev_no); |
26eb2c0c | 2424 | |
0aca7844 | 2425 | if (!p) |
f4c11551 | 2426 | return false; |
b486df19 | 2427 | memcpy(dev_info, p, sizeof(struct visorchipset_device_info)); |
f4c11551 | 2428 | return true; |
12e364b9 KC |
2429 | } |
2430 | EXPORT_SYMBOL_GPL(visorchipset_get_device_info); | |
2431 | ||
f4c11551 | 2432 | bool |
52063eca | 2433 | visorchipset_set_device_context(u32 bus_no, u32 dev_no, void *context) |
12e364b9 | 2434 | { |
d480f6a2 JS |
2435 | struct visorchipset_device_info *p; |
2436 | ||
2437 | p = device_find(&dev_info_list, bus_no, dev_no); | |
26eb2c0c | 2438 | |
0aca7844 | 2439 | if (!p) |
f4c11551 | 2440 | return false; |
12e364b9 | 2441 | p->bus_driver_context = context; |
f4c11551 | 2442 | return true; |
12e364b9 KC |
2443 | } |
2444 | EXPORT_SYMBOL_GPL(visorchipset_set_device_context); | |
2445 | ||
2446 | /* Generic wrapper function for allocating memory from a kmem_cache pool. | |
2447 | */ | |
2448 | void * | |
f4c11551 | 2449 | visorchipset_cache_alloc(struct kmem_cache *pool, bool ok_to_block, |
12e364b9 KC |
2450 | char *fn, int ln) |
2451 | { | |
2452 | gfp_t gfp; | |
2453 | void *p; | |
2454 | ||
2455 | if (ok_to_block) | |
2456 | gfp = GFP_KERNEL; | |
2457 | else | |
2458 | gfp = GFP_ATOMIC; | |
2459 | /* __GFP_NORETRY means "ok to fail", meaning | |
2460 | * kmem_cache_alloc() can return NULL, implying the caller CAN | |
2461 | * cope with failure. If you do NOT specify __GFP_NORETRY, | |
2462 | * Linux will go to extreme measures to get memory for you | |
2463 | * (like, invoke oom killer), which will probably cripple the | |
2464 | * system. | |
2465 | */ | |
2466 | gfp |= __GFP_NORETRY; | |
2467 | p = kmem_cache_alloc(pool, gfp); | |
0aca7844 | 2468 | if (!p) |
12e364b9 | 2469 | return NULL; |
0aca7844 | 2470 | |
12e364b9 KC |
2471 | return p; |
2472 | } | |
2473 | ||
2474 | /* Generic wrapper function for freeing memory from a kmem_cache pool. | |
2475 | */ | |
2476 | void | |
2477 | visorchipset_cache_free(struct kmem_cache *pool, void *p, char *fn, int ln) | |
2478 | { | |
0aca7844 | 2479 | if (!p) |
12e364b9 | 2480 | return; |
0aca7844 | 2481 | |
12e364b9 KC |
2482 | kmem_cache_free(pool, p); |
2483 | } | |
2484 | ||
18b87ed1 | 2485 | static ssize_t chipsetready_store(struct device *dev, |
8e76e695 BR |
2486 | struct device_attribute *attr, |
2487 | const char *buf, size_t count) | |
12e364b9 | 2488 | { |
18b87ed1 | 2489 | char msgtype[64]; |
12e364b9 | 2490 | |
66e24b76 BR |
2491 | if (sscanf(buf, "%63s", msgtype) != 1) |
2492 | return -EINVAL; | |
2493 | ||
ebec8967 | 2494 | if (!strcmp(msgtype, "CALLHOMEDISK_MOUNTED")) { |
66e24b76 BR |
2495 | chipset_events[0] = 1; |
2496 | return count; | |
ebec8967 | 2497 | } else if (!strcmp(msgtype, "MODULES_LOADED")) { |
66e24b76 BR |
2498 | chipset_events[1] = 1; |
2499 | return count; | |
e22a4a0f BR |
2500 | } |
2501 | return -EINVAL; | |
12e364b9 KC |
2502 | } |
2503 | ||
e56fa7cd BR |
2504 | /* The parahotplug/devicedisabled interface gets called by our support script |
2505 | * when an SR-IOV device has been shut down. The ID is passed to the script | |
2506 | * and then passed back when the device has been removed. | |
2507 | */ | |
2508 | static ssize_t devicedisabled_store(struct device *dev, | |
8e76e695 BR |
2509 | struct device_attribute *attr, |
2510 | const char *buf, size_t count) | |
e56fa7cd | 2511 | { |
94217363 | 2512 | unsigned int id; |
e56fa7cd | 2513 | |
ebec8967 | 2514 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2515 | return -EINVAL; |
2516 | ||
2517 | parahotplug_request_complete(id, 0); | |
2518 | return count; | |
2519 | } | |
2520 | ||
2521 | /* The parahotplug/deviceenabled interface gets called by our support script | |
2522 | * when an SR-IOV device has been recovered. The ID is passed to the script | |
2523 | * and then passed back when the device has been brought back up. | |
2524 | */ | |
2525 | static ssize_t deviceenabled_store(struct device *dev, | |
8e76e695 BR |
2526 | struct device_attribute *attr, |
2527 | const char *buf, size_t count) | |
e56fa7cd | 2528 | { |
94217363 | 2529 | unsigned int id; |
e56fa7cd | 2530 | |
ebec8967 | 2531 | if (kstrtouint(buf, 10, &id)) |
e56fa7cd BR |
2532 | return -EINVAL; |
2533 | ||
2534 | parahotplug_request_complete(id, 1); | |
2535 | return count; | |
2536 | } | |
2537 | ||
e3420ed6 EA |
2538 | static int |
2539 | visorchipset_mmap(struct file *file, struct vm_area_struct *vma) | |
2540 | { | |
2541 | unsigned long physaddr = 0; | |
2542 | unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; | |
780fcad3 | 2543 | u64 addr = 0; |
e3420ed6 EA |
2544 | |
2545 | /* sv_enable_dfp(); */ | |
2546 | if (offset & (PAGE_SIZE - 1)) | |
2547 | return -ENXIO; /* need aligned offsets */ | |
2548 | ||
2549 | switch (offset) { | |
2550 | case VISORCHIPSET_MMAP_CONTROLCHANOFFSET: | |
2551 | vma->vm_flags |= VM_IO; | |
2552 | if (!*file_controlvm_channel) | |
2553 | return -ENXIO; | |
2554 | ||
2555 | visorchannel_read(*file_controlvm_channel, | |
2556 | offsetof(struct spar_controlvm_channel_protocol, | |
2557 | gp_control_channel), | |
2558 | &addr, sizeof(addr)); | |
2559 | if (!addr) | |
2560 | return -ENXIO; | |
2561 | ||
2562 | physaddr = (unsigned long)addr; | |
2563 | if (remap_pfn_range(vma, vma->vm_start, | |
2564 | physaddr >> PAGE_SHIFT, | |
2565 | vma->vm_end - vma->vm_start, | |
2566 | /*pgprot_noncached */ | |
2567 | (vma->vm_page_prot))) { | |
2568 | return -EAGAIN; | |
2569 | } | |
2570 | break; | |
2571 | default: | |
2572 | return -ENXIO; | |
2573 | } | |
2574 | return 0; | |
2575 | } | |
2576 | ||
2577 | static long visorchipset_ioctl(struct file *file, unsigned int cmd, | |
2578 | unsigned long arg) | |
2579 | { | |
2580 | s64 adjustment; | |
2581 | s64 vrtc_offset; | |
2582 | ||
2583 | switch (cmd) { | |
2584 | case VMCALL_QUERY_GUEST_VIRTUAL_TIME_OFFSET: | |
2585 | /* get the physical rtc offset */ | |
2586 | vrtc_offset = issue_vmcall_query_guest_virtual_time_offset(); | |
2587 | if (copy_to_user((void __user *)arg, &vrtc_offset, | |
2588 | sizeof(vrtc_offset))) { | |
2589 | return -EFAULT; | |
2590 | } | |
2591 | return SUCCESS; | |
2592 | case VMCALL_UPDATE_PHYSICAL_TIME: | |
2593 | if (copy_from_user(&adjustment, (void __user *)arg, | |
2594 | sizeof(adjustment))) { | |
2595 | return -EFAULT; | |
2596 | } | |
2597 | return issue_vmcall_update_physical_time(adjustment); | |
2598 | default: | |
2599 | return -EFAULT; | |
2600 | } | |
2601 | } | |
2602 | ||
2603 | static const struct file_operations visorchipset_fops = { | |
2604 | .owner = THIS_MODULE, | |
2605 | .open = visorchipset_open, | |
2606 | .read = NULL, | |
2607 | .write = NULL, | |
2608 | .unlocked_ioctl = visorchipset_ioctl, | |
2609 | .release = visorchipset_release, | |
2610 | .mmap = visorchipset_mmap, | |
2611 | }; | |
2612 | ||
2613 | int | |
2614 | visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel) | |
2615 | { | |
2616 | int rc = 0; | |
2617 | ||
2618 | file_controlvm_channel = controlvm_channel; | |
2619 | cdev_init(&file_cdev, &visorchipset_fops); | |
2620 | file_cdev.owner = THIS_MODULE; | |
2621 | if (MAJOR(major_dev) == 0) { | |
46168810 | 2622 | rc = alloc_chrdev_region(&major_dev, 0, 1, "visorchipset"); |
e3420ed6 EA |
2623 | /* dynamic major device number registration required */ |
2624 | if (rc < 0) | |
2625 | return rc; | |
2626 | } else { | |
2627 | /* static major device number registration required */ | |
46168810 | 2628 | rc = register_chrdev_region(major_dev, 1, "visorchipset"); |
e3420ed6 EA |
2629 | if (rc < 0) |
2630 | return rc; | |
2631 | } | |
2632 | rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1); | |
2633 | if (rc < 0) { | |
2634 | unregister_chrdev_region(major_dev, 1); | |
2635 | return rc; | |
2636 | } | |
2637 | return 0; | |
2638 | } | |
2639 | ||
2640 | ||
2641 | ||
12e364b9 KC |
2642 | static int __init |
2643 | visorchipset_init(void) | |
2644 | { | |
33078257 | 2645 | int rc = 0; |
8a1182eb | 2646 | HOSTADDRESS addr; |
12e364b9 | 2647 | |
fcd0157e KC |
2648 | if (!unisys_spar_platform) |
2649 | return -ENODEV; | |
2650 | ||
4da3336c | 2651 | memset(&busdev_notifiers, 0, sizeof(busdev_notifiers)); |
84982fbf | 2652 | memset(&controlvm_payload_info, 0, sizeof(controlvm_payload_info)); |
ea33b4ee BR |
2653 | memset(&livedump_info, 0, sizeof(livedump_info)); |
2654 | atomic_set(&livedump_info.buffers_in_use, 0); | |
12e364b9 | 2655 | |
8a1182eb | 2656 | addr = controlvm_get_channel_address(); |
ebec8967 | 2657 | if (addr) { |
c3d9a224 | 2658 | controlvm_channel = |
8a1182eb BR |
2659 | visorchannel_create_with_lock |
2660 | (addr, | |
d19642f6 | 2661 | sizeof(struct spar_controlvm_channel_protocol), |
5fbaa4b3 | 2662 | spar_controlvm_channel_protocol_uuid); |
93a84565 | 2663 | if (SPAR_CONTROLVM_CHANNEL_OK_CLIENT( |
c3d9a224 | 2664 | visorchannel_get_header(controlvm_channel))) { |
8a1182eb BR |
2665 | initialize_controlvm_payload(); |
2666 | } else { | |
c3d9a224 BR |
2667 | visorchannel_destroy(controlvm_channel); |
2668 | controlvm_channel = NULL; | |
8a1182eb BR |
2669 | return -ENODEV; |
2670 | } | |
2671 | } else { | |
8a1182eb BR |
2672 | return -ENODEV; |
2673 | } | |
2674 | ||
5aa8ae57 BR |
2675 | major_dev = MKDEV(visorchipset_major, 0); |
2676 | rc = visorchipset_file_init(major_dev, &controlvm_channel); | |
4cb005a9 | 2677 | if (rc < 0) { |
4cb005a9 | 2678 | POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); |
a6a3989b | 2679 | goto cleanup; |
4cb005a9 | 2680 | } |
9f8d0e8b | 2681 | |
da021f02 | 2682 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2683 | |
4da3336c DK |
2684 | /* if booting in a crash kernel */ |
2685 | if (is_kdump_kernel()) | |
2686 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2687 | setup_crash_devices_work_queue); | |
2688 | else | |
2689 | INIT_DELAYED_WORK(&periodic_controlvm_work, | |
2690 | controlvm_periodic_work); | |
2691 | periodic_controlvm_workqueue = | |
2692 | create_singlethread_workqueue("visorchipset_controlvm"); | |
2693 | ||
2694 | if (!periodic_controlvm_workqueue) { | |
2695 | POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC, | |
2696 | DIAG_SEVERITY_ERR); | |
2697 | rc = -ENOMEM; | |
2698 | goto cleanup; | |
2699 | } | |
2700 | most_recent_message_jiffies = jiffies; | |
2701 | poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
2702 | rc = queue_delayed_work(periodic_controlvm_workqueue, | |
2703 | &periodic_controlvm_work, poll_jiffies); | |
2704 | if (rc < 0) { | |
2705 | POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC, | |
2706 | DIAG_SEVERITY_ERR); | |
2707 | goto cleanup; | |
12e364b9 KC |
2708 | } |
2709 | ||
eb34e877 BR |
2710 | visorchipset_platform_device.dev.devt = major_dev; |
2711 | if (platform_device_register(&visorchipset_platform_device) < 0) { | |
4cb005a9 KC |
2712 | POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); |
2713 | rc = -1; | |
a6a3989b | 2714 | goto cleanup; |
4cb005a9 | 2715 | } |
12e364b9 | 2716 | POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); |
c79b28f7 PB |
2717 | |
2718 | rc = visorbus_init(); | |
a6a3989b | 2719 | cleanup: |
12e364b9 | 2720 | if (rc) { |
12e364b9 KC |
2721 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, |
2722 | POSTCODE_SEVERITY_ERR); | |
2723 | } | |
2724 | return rc; | |
2725 | } | |
2726 | ||
e3420ed6 EA |
2727 | void |
2728 | visorchipset_file_cleanup(dev_t major_dev) | |
2729 | { | |
2730 | if (file_cdev.ops) | |
2731 | cdev_del(&file_cdev); | |
2732 | file_cdev.ops = NULL; | |
2733 | unregister_chrdev_region(major_dev, 1); | |
2734 | } | |
2735 | ||
12e364b9 KC |
2736 | static void |
2737 | visorchipset_exit(void) | |
2738 | { | |
12e364b9 KC |
2739 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
2740 | ||
c79b28f7 PB |
2741 | visorbus_exit(); |
2742 | ||
4da3336c DK |
2743 | cancel_delayed_work(&periodic_controlvm_work); |
2744 | flush_workqueue(periodic_controlvm_workqueue); | |
2745 | destroy_workqueue(periodic_controlvm_workqueue); | |
2746 | periodic_controlvm_workqueue = NULL; | |
2747 | destroy_controlvm_payload_info(&controlvm_payload_info); | |
1783319f | 2748 | |
12e364b9 KC |
2749 | cleanup_controlvm_structures(); |
2750 | ||
da021f02 | 2751 | memset(&g_chipset_msg_hdr, 0, sizeof(struct controlvm_message_header)); |
12e364b9 | 2752 | |
c3d9a224 | 2753 | visorchannel_destroy(controlvm_channel); |
8a1182eb | 2754 | |
addceb12 | 2755 | visorchipset_file_cleanup(visorchipset_platform_device.dev.devt); |
12e364b9 | 2756 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
12e364b9 KC |
2757 | } |
2758 | ||
12e364b9 | 2759 | module_param_named(major, visorchipset_major, int, S_IRUGO); |
b615d628 JS |
2760 | MODULE_PARM_DESC(visorchipset_major, |
2761 | "major device number to use for the device node"); | |
4da3336c DK |
2762 | module_param_named(visorbusregwait, visorchipset_visorbusregwait, int, S_IRUGO); |
2763 | MODULE_PARM_DESC(visorchipset_visorbusreqwait, | |
12e364b9 | 2764 | "1 to have the module wait for the visor bus to register"); |
12e364b9 KC |
2765 | module_param_named(holdchipsetready, visorchipset_holdchipsetready, |
2766 | int, S_IRUGO); | |
2767 | MODULE_PARM_DESC(visorchipset_holdchipsetready, | |
2768 | "1 to hold response to CHIPSET_READY"); | |
b615d628 | 2769 | |
12e364b9 KC |
2770 | module_init(visorchipset_init); |
2771 | module_exit(visorchipset_exit); | |
2772 | ||
2773 | MODULE_AUTHOR("Unisys"); | |
2774 | MODULE_LICENSE("GPL"); | |
2775 | MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " | |
2776 | VERSION); | |
2777 | MODULE_VERSION(VERSION); |