Commit | Line | Data |
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12e364b9 KC |
1 | /* visorchipset_main.c |
2 | * | |
6f14cc18 | 3 | * Copyright (C) 2010 - 2015 UNISYS CORPORATION |
12e364b9 KC |
4 | * All rights reserved. |
5 | * | |
6f14cc18 BR |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
12e364b9 KC |
9 | * |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
13 | * NON INFRINGEMENT. See the GNU General Public License for more | |
14 | * details. | |
15 | */ | |
16 | ||
55c67dca | 17 | #include <linux/acpi.h> |
46168810 | 18 | #include <linux/ctype.h> |
e3420ed6 EA |
19 | #include <linux/fs.h> |
20 | #include <linux/mm.h> | |
12e364b9 KC |
21 | #include <linux/nls.h> |
22 | #include <linux/netdevice.h> | |
90addb02 | 23 | #include <linux/uuid.h> |
1ba00980 | 24 | #include <linux/crash_dump.h> |
12e364b9 | 25 | |
55c67dca PB |
26 | #include "visorbus.h" |
27 | #include "visorbus_private.h" | |
5f3a7e36 | 28 | #include "vmcallinterface.h" |
55c67dca | 29 | |
3d118a42 | 30 | #define CURRENT_FILE_PC VISOR_BUS_PC_visorchipset_c |
12e364b9 | 31 | |
ccc0d7bf | 32 | #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 |
12e364b9 KC |
33 | #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 |
34 | ||
2c7e1d4e | 35 | #define MAX_CONTROLVM_PAYLOAD_BYTES (1024 * 128) |
2ee0deec | 36 | |
a27ded92 | 37 | #define UNISYS_VISOR_LEAF_ID 0x40000000 |
d5b3f1dc EA |
38 | |
39 | /* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ | |
a27ded92 SW |
40 | #define UNISYS_VISOR_ID_EBX 0x73696e55 |
41 | #define UNISYS_VISOR_ID_ECX 0x70537379 | |
42 | #define UNISYS_VISOR_ID_EDX 0x34367261 | |
d5b3f1dc | 43 | |
ec17f452 DB |
44 | /* |
45 | * When the controlvm channel is idle for at least MIN_IDLE_SECONDS, | |
46 | * we switch to slow polling mode. As soon as we get a controlvm | |
47 | * message, we switch back to fast polling mode. | |
48 | */ | |
12e364b9 | 49 | #define MIN_IDLE_SECONDS 10 |
12e364b9 | 50 | |
46168810 EA |
51 | struct parser_context { |
52 | unsigned long allocbytes; | |
53 | unsigned long param_bytes; | |
54 | u8 *curr; | |
55 | unsigned long bytes_remaining; | |
56 | bool byte_stream; | |
57 | char data[0]; | |
58 | }; | |
59 | ||
bb1fb8ac SW |
60 | struct vmcall_controlvm_addr { |
61 | struct vmcall_io_controlvm_addr_params params; | |
62 | int err; | |
63 | u64 physaddr; | |
64 | }; | |
65 | ||
765b2f82 SW |
66 | struct visorchipset_device { |
67 | struct acpi_device *acpi_device; | |
68 | unsigned long poll_jiffies; | |
69 | /* when we got our last controlvm message */ | |
70 | unsigned long most_recent_message_jiffies; | |
71 | struct delayed_work periodic_controlvm_work; | |
765b2f82 SW |
72 | struct visorchannel *controlvm_channel; |
73 | unsigned long controlvm_payload_bytes_buffered; | |
74 | /* | |
75 | * The following variables are used to handle the scenario where we are | |
76 | * unable to offload the payload from a controlvm message due to memory | |
77 | * requirements. In this scenario, we simply stash the controlvm | |
78 | * message, then attempt to process it again the next time | |
79 | * controlvm_periodic_work() runs. | |
80 | */ | |
81 | struct controlvm_message controlvm_pending_msg; | |
82 | bool controlvm_pending_msg_valid; | |
bb1fb8ac | 83 | struct vmcall_controlvm_addr controlvm_addr; |
765b2f82 | 84 | }; |
12e364b9 | 85 | |
765b2f82 | 86 | static struct visorchipset_device *chipset_dev; |
12e364b9 | 87 | |
12e364b9 KC |
88 | struct parahotplug_request { |
89 | struct list_head list; | |
90 | int id; | |
91 | unsigned long expiration; | |
3ab47701 | 92 | struct controlvm_message msg; |
12e364b9 KC |
93 | }; |
94 | ||
19f6634f BR |
95 | /* prototypes for attributes */ |
96 | static ssize_t toolaction_show(struct device *dev, | |
84efd207 DK |
97 | struct device_attribute *attr, |
98 | char *buf) | |
99 | { | |
100 | u8 tool_action = 0; | |
002a5abb DK |
101 | int err; |
102 | ||
103 | err = visorchannel_read(chipset_dev->controlvm_channel, | |
545f0913 | 104 | offsetof(struct visor_controlvm_channel, |
002a5abb DK |
105 | tool_action), |
106 | &tool_action, sizeof(u8)); | |
107 | if (err) | |
108 | return err; | |
84efd207 | 109 | |
746fb137 | 110 | return sprintf(buf, "%u\n", tool_action); |
84efd207 DK |
111 | } |
112 | ||
19f6634f | 113 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 | 114 | struct device_attribute *attr, |
84efd207 DK |
115 | const char *buf, size_t count) |
116 | { | |
117 | u8 tool_action; | |
dc35cdf3 | 118 | int err; |
84efd207 DK |
119 | |
120 | if (kstrtou8(buf, 10, &tool_action)) | |
121 | return -EINVAL; | |
122 | ||
545f0913 SW |
123 | err = visorchannel_write(chipset_dev->controlvm_channel, |
124 | offsetof(struct visor_controlvm_channel, | |
125 | tool_action), | |
126 | &tool_action, sizeof(u8)); | |
84efd207 | 127 | |
dc35cdf3 DK |
128 | if (err) |
129 | return err; | |
84efd207 DK |
130 | return count; |
131 | } | |
19f6634f BR |
132 | static DEVICE_ATTR_RW(toolaction); |
133 | ||
54b31229 | 134 | static ssize_t boottotool_show(struct device *dev, |
1b1d463d DK |
135 | struct device_attribute *attr, |
136 | char *buf) | |
137 | { | |
545f0913 | 138 | struct efi_visor_indication efi_visor_indication; |
0b01c6ce DK |
139 | int err; |
140 | ||
141 | err = visorchannel_read(chipset_dev->controlvm_channel, | |
545f0913 SW |
142 | offsetof(struct visor_controlvm_channel, |
143 | efi_visor_ind), | |
144 | &efi_visor_indication, | |
145 | sizeof(struct efi_visor_indication)); | |
1b1d463d | 146 | |
0b01c6ce DK |
147 | if (err) |
148 | return err; | |
545f0913 | 149 | return sprintf(buf, "%u\n", efi_visor_indication.boot_to_tool); |
1b1d463d DK |
150 | } |
151 | ||
54b31229 | 152 | static ssize_t boottotool_store(struct device *dev, |
1b1d463d DK |
153 | struct device_attribute *attr, |
154 | const char *buf, size_t count) | |
155 | { | |
b309266e | 156 | int val, err; |
545f0913 | 157 | struct efi_visor_indication efi_visor_indication; |
1b1d463d DK |
158 | |
159 | if (kstrtoint(buf, 10, &val)) | |
160 | return -EINVAL; | |
161 | ||
545f0913 SW |
162 | efi_visor_indication.boot_to_tool = val; |
163 | err = visorchannel_write(chipset_dev->controlvm_channel, | |
164 | offsetof(struct visor_controlvm_channel, | |
165 | efi_visor_ind), | |
166 | &(efi_visor_indication), | |
167 | sizeof(struct efi_visor_indication)); | |
1b1d463d | 168 | |
b309266e DK |
169 | if (err) |
170 | return err; | |
1b1d463d DK |
171 | return count; |
172 | } | |
54b31229 BR |
173 | static DEVICE_ATTR_RW(boottotool); |
174 | ||
422af17c | 175 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8a4a8a03 DK |
176 | char *buf) |
177 | { | |
178 | u32 error = 0; | |
d9857c79 | 179 | int err; |
8a4a8a03 | 180 | |
d9857c79 | 181 | err = visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 182 | offsetof(struct visor_controlvm_channel, |
d9857c79 DK |
183 | installation_error), |
184 | &error, sizeof(u32)); | |
185 | if (err) | |
186 | return err; | |
746fb137 | 187 | return sprintf(buf, "%i\n", error); |
8a4a8a03 DK |
188 | } |
189 | ||
422af17c | 190 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8a4a8a03 DK |
191 | const char *buf, size_t count) |
192 | { | |
193 | u32 error; | |
ea295857 | 194 | int err; |
8a4a8a03 DK |
195 | |
196 | if (kstrtou32(buf, 10, &error)) | |
197 | return -EINVAL; | |
198 | ||
545f0913 SW |
199 | err = visorchannel_write(chipset_dev->controlvm_channel, |
200 | offsetof(struct visor_controlvm_channel, | |
201 | installation_error), | |
202 | &error, sizeof(u32)); | |
ea295857 DK |
203 | if (err) |
204 | return err; | |
8a4a8a03 DK |
205 | return count; |
206 | } | |
422af17c BR |
207 | static DEVICE_ATTR_RW(error); |
208 | ||
209 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
79730c7c DK |
210 | char *buf) |
211 | { | |
212 | u32 text_id = 0; | |
0d406436 DK |
213 | int err; |
214 | ||
545f0913 SW |
215 | err = visorchannel_read(chipset_dev->controlvm_channel, |
216 | offsetof(struct visor_controlvm_channel, | |
217 | installation_text_id), | |
218 | &text_id, sizeof(u32)); | |
0d406436 DK |
219 | if (err) |
220 | return err; | |
79730c7c | 221 | |
746fb137 | 222 | return sprintf(buf, "%i\n", text_id); |
79730c7c DK |
223 | } |
224 | ||
422af17c | 225 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
79730c7c DK |
226 | const char *buf, size_t count) |
227 | { | |
228 | u32 text_id; | |
08a55d2d | 229 | int err; |
79730c7c DK |
230 | |
231 | if (kstrtou32(buf, 10, &text_id)) | |
232 | return -EINVAL; | |
233 | ||
545f0913 SW |
234 | err = visorchannel_write(chipset_dev->controlvm_channel, |
235 | offsetof(struct visor_controlvm_channel, | |
236 | installation_text_id), | |
237 | &text_id, sizeof(u32)); | |
08a55d2d DK |
238 | if (err) |
239 | return err; | |
79730c7c DK |
240 | return count; |
241 | } | |
422af17c BR |
242 | static DEVICE_ATTR_RW(textid); |
243 | ||
244 | static ssize_t remaining_steps_show(struct device *dev, | |
97f792ee DK |
245 | struct device_attribute *attr, char *buf) |
246 | { | |
247 | u16 remaining_steps = 0; | |
c53578bd DK |
248 | int err; |
249 | ||
250 | err = visorchannel_read(chipset_dev->controlvm_channel, | |
545f0913 | 251 | offsetof(struct visor_controlvm_channel, |
c53578bd DK |
252 | installation_remaining_steps), |
253 | &remaining_steps, sizeof(u16)); | |
254 | if (err) | |
255 | return err; | |
97f792ee | 256 | |
746fb137 | 257 | return sprintf(buf, "%hu\n", remaining_steps); |
97f792ee DK |
258 | } |
259 | ||
422af17c | 260 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 | 261 | struct device_attribute *attr, |
97f792ee DK |
262 | const char *buf, size_t count) |
263 | { | |
264 | u16 remaining_steps; | |
e030d39d | 265 | int err; |
97f792ee DK |
266 | |
267 | if (kstrtou16(buf, 10, &remaining_steps)) | |
268 | return -EINVAL; | |
269 | ||
545f0913 SW |
270 | err = visorchannel_write(chipset_dev->controlvm_channel, |
271 | offsetof(struct visor_controlvm_channel, | |
272 | installation_remaining_steps), | |
273 | &remaining_steps, sizeof(u16)); | |
e030d39d DK |
274 | if (err) |
275 | return err; | |
97f792ee DK |
276 | return count; |
277 | } | |
422af17c BR |
278 | static DEVICE_ATTR_RW(remaining_steps); |
279 | ||
464129ed | 280 | static uuid_le |
46168810 EA |
281 | parser_id_get(struct parser_context *ctx) |
282 | { | |
545f0913 | 283 | struct visor_controlvm_parameters_header *phdr = NULL; |
46168810 | 284 | |
545f0913 | 285 | phdr = (struct visor_controlvm_parameters_header *)(ctx->data); |
46168810 EA |
286 | return phdr->id; |
287 | } | |
288 | ||
464129ed | 289 | static void parser_done(struct parser_context *ctx) |
46168810 | 290 | { |
765b2f82 | 291 | chipset_dev->controlvm_payload_bytes_buffered -= ctx->param_bytes; |
46168810 EA |
292 | kfree(ctx); |
293 | } | |
294 | ||
464129ed | 295 | static void * |
46168810 EA |
296 | parser_string_get(struct parser_context *ctx) |
297 | { | |
298 | u8 *pscan; | |
299 | unsigned long nscan; | |
300 | int value_length = -1; | |
301 | void *value = NULL; | |
302 | int i; | |
303 | ||
46168810 EA |
304 | pscan = ctx->curr; |
305 | nscan = ctx->bytes_remaining; | |
306 | if (nscan == 0) | |
307 | return NULL; | |
308 | if (!pscan) | |
309 | return NULL; | |
310 | for (i = 0, value_length = -1; i < nscan; i++) | |
311 | if (pscan[i] == '\0') { | |
312 | value_length = i; | |
313 | break; | |
314 | } | |
315 | if (value_length < 0) /* '\0' was not included in the length */ | |
316 | value_length = nscan; | |
8c8c975f | 317 | value = kmalloc(value_length + 1, GFP_KERNEL); |
e4a3dd33 | 318 | if (!value) |
46168810 EA |
319 | return NULL; |
320 | if (value_length > 0) | |
321 | memcpy(value, pscan, value_length); | |
0e7bf2f4 | 322 | ((u8 *)(value))[value_length] = '\0'; |
46168810 EA |
323 | return value; |
324 | } | |
325 | ||
046f93dc DK |
326 | static void * |
327 | parser_name_get(struct parser_context *ctx) | |
328 | { | |
545f0913 | 329 | struct visor_controlvm_parameters_header *phdr = NULL; |
046f93dc | 330 | |
545f0913 | 331 | phdr = (struct visor_controlvm_parameters_header *)(ctx->data); |
308ee8aa DB |
332 | |
333 | if (phdr->name_offset + phdr->name_length > ctx->param_bytes) | |
334 | return NULL; | |
335 | ||
046f93dc DK |
336 | ctx->curr = ctx->data + phdr->name_offset; |
337 | ctx->bytes_remaining = phdr->name_length; | |
338 | return parser_string_get(ctx); | |
339 | } | |
340 | ||
ab0592b9 DZ |
341 | struct visor_busdev { |
342 | u32 bus_no; | |
343 | u32 dev_no; | |
344 | }; | |
345 | ||
346 | static int match_visorbus_dev_by_id(struct device *dev, void *data) | |
347 | { | |
348 | struct visor_device *vdev = to_visor_device(dev); | |
7f44582e | 349 | struct visor_busdev *id = data; |
ab0592b9 DZ |
350 | u32 bus_no = id->bus_no; |
351 | u32 dev_no = id->dev_no; | |
352 | ||
65bd6e46 DZ |
353 | if ((vdev->chipset_bus_no == bus_no) && |
354 | (vdev->chipset_dev_no == dev_no)) | |
ab0592b9 DZ |
355 | return 1; |
356 | ||
357 | return 0; | |
358 | } | |
d1e08637 | 359 | |
ab0592b9 DZ |
360 | struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, |
361 | struct visor_device *from) | |
362 | { | |
363 | struct device *dev; | |
364 | struct device *dev_start = NULL; | |
365 | struct visor_device *vdev = NULL; | |
366 | struct visor_busdev id = { | |
367 | .bus_no = bus_no, | |
368 | .dev_no = dev_no | |
369 | }; | |
370 | ||
371 | if (from) | |
372 | dev_start = &from->device; | |
373 | dev = bus_find_device(&visorbus_type, dev_start, (void *)&id, | |
374 | match_visorbus_dev_by_id); | |
375 | if (dev) | |
376 | vdev = to_visor_device(dev); | |
377 | return vdev; | |
378 | } | |
ab0592b9 | 379 | |
5f251395 DK |
380 | static void |
381 | controlvm_init_response(struct controlvm_message *msg, | |
382 | struct controlvm_message_header *msg_hdr, int response) | |
383 | { | |
384 | memset(msg, 0, sizeof(struct controlvm_message)); | |
385 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); | |
386 | msg->hdr.payload_bytes = 0; | |
387 | msg->hdr.payload_vm_offset = 0; | |
388 | msg->hdr.payload_max_bytes = 0; | |
389 | if (response < 0) { | |
390 | msg->hdr.flags.failed = 1; | |
391 | msg->hdr.completion_status = (u32)(-response); | |
392 | } | |
393 | } | |
394 | ||
1d7f5522 | 395 | static int |
5f251395 DK |
396 | controlvm_respond_chipset_init(struct controlvm_message_header *msg_hdr, |
397 | int response, | |
398 | enum ultra_chipset_feature features) | |
399 | { | |
400 | struct controlvm_message outmsg; | |
401 | ||
402 | controlvm_init_response(&outmsg, msg_hdr, response); | |
403 | outmsg.cmd.init_chipset.features = features; | |
765b2f82 | 404 | return visorchannel_signalinsert(chipset_dev->controlvm_channel, |
1d7f5522 | 405 | CONTROLVM_QUEUE_REQUEST, &outmsg); |
5f251395 DK |
406 | } |
407 | ||
79c3f971 | 408 | static int |
3ab47701 | 409 | chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
410 | { |
411 | static int chipset_inited; | |
b9b141e8 | 412 | enum ultra_chipset_feature features = 0; |
12e364b9 | 413 | int rc = CONTROLVM_RESP_SUCCESS; |
79c3f971 | 414 | int res = 0; |
12e364b9 | 415 | |
12e364b9 | 416 | if (chipset_inited) { |
98f9ed9e | 417 | rc = -CONTROLVM_RESP_ALREADY_DONE; |
79c3f971 | 418 | res = -EIO; |
5233d1eb | 419 | goto out_respond; |
12e364b9 KC |
420 | } |
421 | chipset_inited = 1; | |
12e364b9 | 422 | |
ec17f452 DB |
423 | /* |
424 | * Set features to indicate we support parahotplug (if Command | |
2ee0d052 EA |
425 | * also supports it). |
426 | */ | |
0762188b DB |
427 | features = inmsg->cmd.init_chipset.features & |
428 | ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; | |
12e364b9 | 429 | |
ec17f452 DB |
430 | /* |
431 | * Set the "reply" bit so Command knows this is a | |
2ee0d052 EA |
432 | * features-aware driver. |
433 | */ | |
12e364b9 KC |
434 | features |= ULTRA_CHIPSET_FEATURE_REPLY; |
435 | ||
5233d1eb | 436 | out_respond: |
98d7b594 | 437 | if (inmsg->hdr.flags.response_expected) |
79c3f971 DK |
438 | res = controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
439 | ||
440 | return res; | |
12e364b9 KC |
441 | } |
442 | ||
2d26aeb7 | 443 | static int |
4c0e65f8 | 444 | controlvm_respond(struct controlvm_message_header *msg_hdr, int response, |
545f0913 | 445 | struct visor_segment_state *state) |
12e364b9 | 446 | { |
3ab47701 | 447 | struct controlvm_message outmsg; |
26eb2c0c | 448 | |
b3168c70 | 449 | controlvm_init_response(&outmsg, msg_hdr, response); |
2098dbd1 | 450 | if (outmsg.hdr.flags.test_message == 1) |
2d26aeb7 | 451 | return -EINVAL; |
2098dbd1 | 452 | |
4c0e65f8 DK |
453 | if (state) { |
454 | outmsg.cmd.device_change_state.state = *state; | |
455 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
456 | } | |
26eb2c0c | 457 | |
765b2f82 | 458 | return visorchannel_signalinsert(chipset_dev->controlvm_channel, |
2c4ef563 | 459 | CONTROLVM_QUEUE_REQUEST, &outmsg); |
12e364b9 KC |
460 | } |
461 | ||
2ee0deec PB |
462 | enum crash_obj_type { |
463 | CRASH_DEV, | |
464 | CRASH_BUS, | |
465 | }; | |
466 | ||
8dff01f7 | 467 | static int |
603a1989 | 468 | save_crash_message(struct controlvm_message *msg, enum crash_obj_type cr_type) |
12c957dc TS |
469 | { |
470 | u32 local_crash_msg_offset; | |
471 | u16 local_crash_msg_count; | |
8dff01f7 | 472 | int err; |
12c957dc | 473 | |
765b2f82 | 474 | err = visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 475 | offsetof(struct visor_controlvm_channel, |
8dff01f7 DK |
476 | saved_crash_message_count), |
477 | &local_crash_msg_count, sizeof(u16)); | |
478 | if (err) { | |
35301b87 DK |
479 | dev_err(&chipset_dev->acpi_device->dev, |
480 | "failed to read message count\n"); | |
8dff01f7 | 481 | return err; |
12c957dc TS |
482 | } |
483 | ||
484 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { | |
35301b87 DK |
485 | dev_err(&chipset_dev->acpi_device->dev, |
486 | "invalid number of messages\n"); | |
8dff01f7 | 487 | return -EIO; |
12c957dc TS |
488 | } |
489 | ||
765b2f82 | 490 | err = visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 491 | offsetof(struct visor_controlvm_channel, |
8dff01f7 DK |
492 | saved_crash_message_offset), |
493 | &local_crash_msg_offset, sizeof(u32)); | |
494 | if (err) { | |
35301b87 DK |
495 | dev_err(&chipset_dev->acpi_device->dev, |
496 | "failed to read offset\n"); | |
8dff01f7 | 497 | return err; |
12c957dc TS |
498 | } |
499 | ||
603a1989 | 500 | switch (cr_type) { |
36309d3b DB |
501 | case CRASH_DEV: |
502 | local_crash_msg_offset += sizeof(struct controlvm_message); | |
765b2f82 | 503 | err = visorchannel_write(chipset_dev->controlvm_channel, |
8dff01f7 DK |
504 | local_crash_msg_offset, |
505 | msg, | |
36309d3b | 506 | sizeof(struct controlvm_message)); |
8dff01f7 | 507 | if (err) { |
35301b87 DK |
508 | dev_err(&chipset_dev->acpi_device->dev, |
509 | "failed to write dev msg\n"); | |
8dff01f7 | 510 | return err; |
12c957dc | 511 | } |
36309d3b DB |
512 | break; |
513 | case CRASH_BUS: | |
765b2f82 | 514 | err = visorchannel_write(chipset_dev->controlvm_channel, |
8dff01f7 DK |
515 | local_crash_msg_offset, |
516 | msg, | |
517 | sizeof(struct controlvm_message)); | |
518 | if (err) { | |
35301b87 DK |
519 | dev_err(&chipset_dev->acpi_device->dev, |
520 | "failed to write bus msg\n"); | |
8dff01f7 | 521 | return err; |
12c957dc | 522 | } |
36309d3b DB |
523 | break; |
524 | default: | |
35301b87 DK |
525 | dev_err(&chipset_dev->acpi_device->dev, |
526 | "Invalid crash_obj_type\n"); | |
36309d3b | 527 | break; |
12c957dc | 528 | } |
8dff01f7 | 529 | return 0; |
12c957dc TS |
530 | } |
531 | ||
734ad93a | 532 | static int |
4fb2539c DK |
533 | controlvm_responder(enum controlvm_id cmd_id, |
534 | struct controlvm_message_header *pending_msg_hdr, | |
535 | int response) | |
12e364b9 | 536 | { |
e4a3dd33 | 537 | if (!pending_msg_hdr) |
734ad93a | 538 | return -EIO; |
12e364b9 | 539 | |
0274b5ae | 540 | if (pending_msg_hdr->id != (u32)cmd_id) |
734ad93a | 541 | return -EINVAL; |
0aca7844 | 542 | |
4c0e65f8 | 543 | return controlvm_respond(pending_msg_hdr, response, NULL); |
12e364b9 KC |
544 | } |
545 | ||
68f99d49 | 546 | static int |
fbb31f48 | 547 | device_changestate_responder(enum controlvm_id cmd_id, |
a298bc0b | 548 | struct visor_device *p, int response, |
545f0913 | 549 | struct visor_segment_state response_state) |
12e364b9 | 550 | { |
3ab47701 | 551 | struct controlvm_message outmsg; |
a298bc0b DZ |
552 | u32 bus_no = p->chipset_bus_no; |
553 | u32 dev_no = p->chipset_dev_no; | |
12e364b9 | 554 | |
e4a3dd33 | 555 | if (!p->pending_msg_hdr) |
68f99d49 | 556 | return -EIO; |
0274b5ae | 557 | if (p->pending_msg_hdr->id != cmd_id) |
68f99d49 | 558 | return -EINVAL; |
12e364b9 | 559 | |
0274b5ae | 560 | controlvm_init_response(&outmsg, p->pending_msg_hdr, response); |
12e364b9 | 561 | |
fbb31f48 BR |
562 | outmsg.cmd.device_change_state.bus_no = bus_no; |
563 | outmsg.cmd.device_change_state.dev_no = dev_no; | |
564 | outmsg.cmd.device_change_state.state = response_state; | |
12e364b9 | 565 | |
765b2f82 | 566 | return visorchannel_signalinsert(chipset_dev->controlvm_channel, |
68f99d49 | 567 | CONTROLVM_QUEUE_REQUEST, &outmsg); |
12e364b9 KC |
568 | } |
569 | ||
33161a29 | 570 | static int |
ec17cb8a | 571 | visorbus_create(struct controlvm_message *inmsg) |
12e364b9 | 572 | { |
2ea5117b | 573 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
8f334e30 | 574 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca | 575 | u32 bus_no = cmd->create_bus.bus_no; |
d32517e3 | 576 | struct visor_device *bus_info; |
b32c4997 | 577 | struct visorchannel *visorchannel; |
33161a29 | 578 | int err; |
12e364b9 | 579 | |
d32517e3 | 580 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
6c5fed35 | 581 | if (bus_info && (bus_info->state.created == 1)) { |
055bc909 | 582 | dev_err(&chipset_dev->acpi_device->dev, |
ec17cb8a | 583 | "failed visorbus_create: already exists\n"); |
33161a29 DK |
584 | err = -EEXIST; |
585 | goto err_respond; | |
12e364b9 | 586 | } |
33161a29 | 587 | |
6c5fed35 BR |
588 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
589 | if (!bus_info) { | |
33161a29 DK |
590 | err = -ENOMEM; |
591 | goto err_respond; | |
12e364b9 KC |
592 | } |
593 | ||
4abce83d | 594 | INIT_LIST_HEAD(&bus_info->list_all); |
d32517e3 DZ |
595 | bus_info->chipset_bus_no = bus_no; |
596 | bus_info->chipset_dev_no = BUS_ROOT_DEVICE; | |
12e364b9 | 597 | |
300ed612 DK |
598 | if (uuid_le_cmp(cmd->create_bus.bus_inst_uuid, spar_siovm_uuid) == 0) { |
599 | err = save_crash_message(inmsg, CRASH_BUS); | |
600 | if (err) | |
601 | goto err_free_bus_info; | |
602 | } | |
12e364b9 | 603 | |
8f334e30 DK |
604 | if (inmsg->hdr.flags.response_expected == 1) { |
605 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), | |
606 | GFP_KERNEL); | |
607 | if (!pmsg_hdr) { | |
33161a29 DK |
608 | err = -ENOMEM; |
609 | goto err_free_bus_info; | |
8f334e30 DK |
610 | } |
611 | ||
612 | memcpy(pmsg_hdr, &inmsg->hdr, | |
613 | sizeof(struct controlvm_message_header)); | |
614 | bus_info->pending_msg_hdr = pmsg_hdr; | |
615 | } | |
616 | ||
33161a29 DK |
617 | visorchannel = visorchannel_create(cmd->create_bus.channel_addr, |
618 | cmd->create_bus.channel_bytes, | |
619 | GFP_KERNEL, | |
620 | cmd->create_bus.bus_data_type_uuid); | |
621 | ||
622 | if (!visorchannel) { | |
33161a29 DK |
623 | err = -ENOMEM; |
624 | goto err_free_pending_msg; | |
625 | } | |
626 | bus_info->visorchannel = visorchannel; | |
627 | ||
4f96c730 SW |
628 | /* Response will be handled by visorchipset_bus_create */ |
629 | err = visorchipset_bus_create(bus_info); | |
630 | /* If visorchipset_bus_create didn't respond, need to respond here */ | |
621f5e18 DK |
631 | if (err) |
632 | goto err_destroy_channel; | |
8f334e30 | 633 | |
33161a29 DK |
634 | return 0; |
635 | ||
621f5e18 DK |
636 | err_destroy_channel: |
637 | visorchannel_destroy(visorchannel); | |
638 | ||
33161a29 DK |
639 | err_free_pending_msg: |
640 | kfree(bus_info->pending_msg_hdr); | |
8f334e30 | 641 | |
33161a29 | 642 | err_free_bus_info: |
8f334e30 | 643 | kfree(bus_info); |
12e364b9 | 644 | |
33161a29 | 645 | err_respond: |
8f334e30 | 646 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 647 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
33161a29 | 648 | return err; |
12e364b9 KC |
649 | } |
650 | ||
30f6c3f5 | 651 | static int |
ec17cb8a | 652 | visorbus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 653 | { |
2ea5117b | 654 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
3e0e8db9 | 655 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca | 656 | u32 bus_no = cmd->destroy_bus.bus_no; |
d32517e3 | 657 | struct visor_device *bus_info; |
30f6c3f5 | 658 | int err; |
12e364b9 | 659 | |
d32517e3 | 660 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
3e0e8db9 | 661 | if (!bus_info) { |
30f6c3f5 DK |
662 | err = -ENODEV; |
663 | goto err_respond; | |
3e0e8db9 DK |
664 | } |
665 | if (bus_info->state.created == 0) { | |
30f6c3f5 DK |
666 | err = -ENOENT; |
667 | goto err_respond; | |
3e0e8db9 DK |
668 | } |
669 | if (bus_info->pending_msg_hdr) { | |
670 | /* only non-NULL if dev is still waiting on a response */ | |
30f6c3f5 DK |
671 | err = -EEXIST; |
672 | goto err_respond; | |
3e0e8db9 DK |
673 | } |
674 | if (inmsg->hdr.flags.response_expected == 1) { | |
675 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); | |
676 | if (!pmsg_hdr) { | |
30f6c3f5 DK |
677 | err = -ENOMEM; |
678 | goto err_respond; | |
3e0e8db9 DK |
679 | } |
680 | ||
681 | memcpy(pmsg_hdr, &inmsg->hdr, | |
682 | sizeof(struct controlvm_message_header)); | |
683 | bus_info->pending_msg_hdr = pmsg_hdr; | |
684 | } | |
12e364b9 | 685 | |
4f96c730 SW |
686 | /* Response will be handled by visorchipset_bus_destroy */ |
687 | visorchipset_bus_destroy(bus_info); | |
30f6c3f5 | 688 | return 0; |
3e0e8db9 | 689 | |
30f6c3f5 | 690 | err_respond: |
3e0e8db9 | 691 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 692 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
30f6c3f5 | 693 | return err; |
12e364b9 KC |
694 | } |
695 | ||
c71529fe | 696 | static int |
ec17cb8a SW |
697 | visorbus_configure(struct controlvm_message *inmsg, |
698 | struct parser_context *parser_ctx) | |
12e364b9 | 699 | { |
2ea5117b | 700 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e | 701 | u32 bus_no; |
d32517e3 | 702 | struct visor_device *bus_info; |
c71529fe | 703 | int err = 0; |
12e364b9 | 704 | |
654bada0 | 705 | bus_no = cmd->configure_bus.bus_no; |
d32517e3 | 706 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
654bada0 | 707 | if (!bus_info) { |
c71529fe DK |
708 | err = -EINVAL; |
709 | goto err_respond; | |
654bada0 | 710 | } else if (bus_info->state.created == 0) { |
c71529fe DK |
711 | err = -EINVAL; |
712 | goto err_respond; | |
e4a3dd33 | 713 | } else if (bus_info->pending_msg_hdr) { |
c71529fe DK |
714 | err = -EIO; |
715 | goto err_respond; | |
12e364b9 | 716 | } |
c71529fe DK |
717 | |
718 | err = visorchannel_set_clientpartition | |
719 | (bus_info->visorchannel, | |
720 | cmd->configure_bus.guest_handle); | |
721 | if (err) | |
722 | goto err_respond; | |
723 | ||
046f93dc DK |
724 | if (parser_ctx) { |
725 | bus_info->partition_uuid = parser_id_get(parser_ctx); | |
726 | bus_info->name = parser_name_get(parser_ctx); | |
727 | } | |
c71529fe | 728 | |
c71529fe | 729 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 730 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
c71529fe DK |
731 | return 0; |
732 | ||
733 | err_respond: | |
71a0265d | 734 | dev_err(&chipset_dev->acpi_device->dev, |
ec17cb8a | 735 | "visorbus_configure exited with err: %d\n", err); |
b6b057d8 | 736 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 737 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
c71529fe | 738 | return err; |
12e364b9 KC |
739 | } |
740 | ||
ad2a7d65 | 741 | static int |
8b0a6cfa | 742 | visorbus_device_create(struct controlvm_message *inmsg) |
12e364b9 | 743 | { |
2ea5117b | 744 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
5a80e98a | 745 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca JS |
746 | u32 bus_no = cmd->create_device.bus_no; |
747 | u32 dev_no = cmd->create_device.dev_no; | |
a298bc0b | 748 | struct visor_device *dev_info = NULL; |
d32517e3 | 749 | struct visor_device *bus_info; |
b32c4997 | 750 | struct visorchannel *visorchannel; |
ad2a7d65 | 751 | int err; |
12e364b9 | 752 | |
a298bc0b DZ |
753 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
754 | if (!bus_info) { | |
a8c26e4b DK |
755 | dev_err(&chipset_dev->acpi_device->dev, |
756 | "failed to get bus by id: %d\n", bus_no); | |
ad2a7d65 DK |
757 | err = -ENODEV; |
758 | goto err_respond; | |
12e364b9 | 759 | } |
a298bc0b DZ |
760 | |
761 | if (bus_info->state.created == 0) { | |
a8c26e4b DK |
762 | dev_err(&chipset_dev->acpi_device->dev, |
763 | "bus not created, id: %d\n", bus_no); | |
ad2a7d65 DK |
764 | err = -EINVAL; |
765 | goto err_respond; | |
12e364b9 | 766 | } |
a298bc0b DZ |
767 | |
768 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); | |
769 | if (dev_info && (dev_info->state.created == 1)) { | |
a8c26e4b DK |
770 | dev_err(&chipset_dev->acpi_device->dev, |
771 | "failed to get bus by id: %d/%d\n", bus_no, dev_no); | |
ad2a7d65 DK |
772 | err = -EEXIST; |
773 | goto err_respond; | |
12e364b9 | 774 | } |
a298bc0b | 775 | |
c60c8e26 BR |
776 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
777 | if (!dev_info) { | |
ad2a7d65 DK |
778 | err = -ENOMEM; |
779 | goto err_respond; | |
12e364b9 | 780 | } |
97a84f12 | 781 | |
a298bc0b DZ |
782 | dev_info->chipset_bus_no = bus_no; |
783 | dev_info->chipset_dev_no = dev_no; | |
784 | dev_info->inst = cmd->create_device.dev_inst_uuid; | |
785 | ||
786 | /* not sure where the best place to set the 'parent' */ | |
787 | dev_info->device.parent = &bus_info->device; | |
788 | ||
a3ef1a8e DK |
789 | visorchannel = |
790 | visorchannel_create_with_lock(cmd->create_device.channel_addr, | |
791 | cmd->create_device.channel_bytes, | |
792 | GFP_KERNEL, | |
793 | cmd->create_device.data_type_uuid); | |
b32c4997 DZ |
794 | |
795 | if (!visorchannel) { | |
a8c26e4b DK |
796 | dev_err(&chipset_dev->acpi_device->dev, |
797 | "failed to create visorchannel: %d/%d\n", | |
798 | bus_no, dev_no); | |
ad2a7d65 DK |
799 | err = -ENOMEM; |
800 | goto err_free_dev_info; | |
b32c4997 DZ |
801 | } |
802 | dev_info->visorchannel = visorchannel; | |
803 | dev_info->channel_type_guid = cmd->create_device.data_type_uuid; | |
12c957dc | 804 | if (uuid_le_cmp(cmd->create_device.data_type_uuid, |
ad2a7d65 DK |
805 | spar_vhba_channel_protocol_uuid) == 0) { |
806 | err = save_crash_message(inmsg, CRASH_DEV); | |
807 | if (err) | |
3f49a21d | 808 | goto err_destroy_visorchannel; |
ad2a7d65 | 809 | } |
12c957dc | 810 | |
5a80e98a DK |
811 | if (inmsg->hdr.flags.response_expected == 1) { |
812 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); | |
813 | if (!pmsg_hdr) { | |
ad2a7d65 | 814 | err = -ENOMEM; |
3f49a21d | 815 | goto err_destroy_visorchannel; |
5a80e98a DK |
816 | } |
817 | ||
818 | memcpy(pmsg_hdr, &inmsg->hdr, | |
819 | sizeof(struct controlvm_message_header)); | |
820 | dev_info->pending_msg_hdr = pmsg_hdr; | |
821 | } | |
c0b44136 SW |
822 | /* visorchipset_device_create will send response */ |
823 | err = visorchipset_device_create(dev_info); | |
3f49a21d DK |
824 | if (err) |
825 | goto err_destroy_visorchannel; | |
826 | ||
ad2a7d65 | 827 | return 0; |
5a80e98a | 828 | |
3f49a21d DK |
829 | err_destroy_visorchannel: |
830 | visorchannel_destroy(visorchannel); | |
831 | ||
ad2a7d65 | 832 | err_free_dev_info: |
5a80e98a DK |
833 | kfree(dev_info); |
834 | ||
ad2a7d65 | 835 | err_respond: |
5a80e98a | 836 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 837 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
ad2a7d65 | 838 | return err; |
12e364b9 KC |
839 | } |
840 | ||
40fc79f9 | 841 | static int |
8b0a6cfa | 842 | visorbus_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 843 | { |
2ea5117b | 844 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
8e609b5b | 845 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca JS |
846 | u32 bus_no = cmd->device_change_state.bus_no; |
847 | u32 dev_no = cmd->device_change_state.dev_no; | |
545f0913 | 848 | struct visor_segment_state state = cmd->device_change_state.state; |
a298bc0b | 849 | struct visor_device *dev_info; |
b4a8e6ae | 850 | int err = 0; |
12e364b9 | 851 | |
a298bc0b | 852 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
0278a905 | 853 | if (!dev_info) { |
40fc79f9 | 854 | err = -ENODEV; |
0825f191 DK |
855 | goto err_respond; |
856 | } | |
857 | if (dev_info->state.created == 0) { | |
40fc79f9 | 858 | err = -EINVAL; |
0825f191 | 859 | goto err_respond; |
12e364b9 | 860 | } |
8e609b5b DK |
861 | if (dev_info->pending_msg_hdr) { |
862 | /* only non-NULL if dev is still waiting on a response */ | |
40fc79f9 | 863 | err = -EIO; |
8e609b5b DK |
864 | goto err_respond; |
865 | } | |
866 | if (inmsg->hdr.flags.response_expected == 1) { | |
867 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); | |
868 | if (!pmsg_hdr) { | |
40fc79f9 | 869 | err = -ENOMEM; |
8e609b5b DK |
870 | goto err_respond; |
871 | } | |
872 | ||
873 | memcpy(pmsg_hdr, &inmsg->hdr, | |
874 | sizeof(struct controlvm_message_header)); | |
875 | dev_info->pending_msg_hdr = pmsg_hdr; | |
876 | } | |
877 | ||
878 | if (state.alive == segment_state_running.alive && | |
879 | state.operating == segment_state_running.operating) | |
c0b44136 SW |
880 | /* Response will be sent from visorchipset_device_resume */ |
881 | err = visorchipset_device_resume(dev_info); | |
8e609b5b DK |
882 | /* ServerNotReady / ServerLost / SegmentStateStandby */ |
883 | else if (state.alive == segment_state_standby.alive && | |
884 | state.operating == segment_state_standby.operating) | |
885 | /* | |
886 | * technically this is standby case where server is lost. | |
c0b44136 | 887 | * Response will be sent from visorchipset_device_pause. |
8e609b5b | 888 | */ |
c0b44136 | 889 | err = visorchipset_device_pause(dev_info); |
b4a8e6ae DK |
890 | if (err) |
891 | goto err_respond; | |
892 | ||
40fc79f9 | 893 | return 0; |
0825f191 DK |
894 | |
895 | err_respond: | |
03662df8 | 896 | dev_err(&chipset_dev->acpi_device->dev, "failed: %d\n", err); |
8e609b5b | 897 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 898 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
40fc79f9 | 899 | return err; |
12e364b9 KC |
900 | } |
901 | ||
e7954918 | 902 | static int |
8b0a6cfa | 903 | visorbus_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 904 | { |
2ea5117b | 905 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
9e9eec6b | 906 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca JS |
907 | u32 bus_no = cmd->destroy_device.bus_no; |
908 | u32 dev_no = cmd->destroy_device.dev_no; | |
a298bc0b | 909 | struct visor_device *dev_info; |
e7954918 | 910 | int err; |
12e364b9 | 911 | |
a298bc0b | 912 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
9e9eec6b | 913 | if (!dev_info) { |
e7954918 | 914 | err = -ENODEV; |
9e9eec6b DK |
915 | goto err_respond; |
916 | } | |
917 | if (dev_info->state.created == 0) { | |
e7954918 | 918 | err = -EINVAL; |
9e9eec6b DK |
919 | goto err_respond; |
920 | } | |
12e364b9 | 921 | |
9e9eec6b DK |
922 | if (dev_info->pending_msg_hdr) { |
923 | /* only non-NULL if dev is still waiting on a response */ | |
e7954918 | 924 | err = -EIO; |
9e9eec6b DK |
925 | goto err_respond; |
926 | } | |
927 | if (inmsg->hdr.flags.response_expected == 1) { | |
928 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); | |
929 | if (!pmsg_hdr) { | |
e7954918 | 930 | err = -ENOMEM; |
9e9eec6b DK |
931 | goto err_respond; |
932 | } | |
933 | ||
934 | memcpy(pmsg_hdr, &inmsg->hdr, | |
935 | sizeof(struct controlvm_message_header)); | |
936 | dev_info->pending_msg_hdr = pmsg_hdr; | |
937 | } | |
938 | ||
c0b44136 | 939 | visorchipset_device_destroy(dev_info); |
e7954918 | 940 | return 0; |
9e9eec6b DK |
941 | |
942 | err_respond: | |
943 | if (inmsg->hdr.flags.response_expected == 1) | |
4fb2539c | 944 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
e7954918 | 945 | return err; |
12e364b9 KC |
946 | } |
947 | ||
12e364b9 | 948 | /* |
5d501ef4 DB |
949 | * The general parahotplug flow works as follows. The visorchipset receives |
950 | * a DEVICE_CHANGESTATE message from Command specifying a physical device | |
951 | * to enable or disable. The CONTROLVM message handler calls | |
952 | * parahotplug_process_message, which then adds the message to a global list | |
953 | * and kicks off a udev event which causes a user level script to enable or | |
954 | * disable the specified device. The udev script then writes to | |
955 | * /sys/devices/platform/visorchipset/parahotplug, which causes the | |
956 | * parahotplug store functions to get called, at which point the | |
957 | * appropriate CONTROLVM message is retrieved from the list and responded | |
958 | * to. | |
12e364b9 KC |
959 | */ |
960 | ||
961 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
962 | ||
04dbfea6 | 963 | /* |
5d501ef4 DB |
964 | * parahotplug_next_id() - generate unique int to match an outstanding |
965 | * CONTROLVM message with a udev script /sys | |
966 | * response | |
ec17f452 DB |
967 | * |
968 | * Return: a unique integer value | |
12e364b9 KC |
969 | */ |
970 | static int | |
971 | parahotplug_next_id(void) | |
972 | { | |
973 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 974 | |
12e364b9 KC |
975 | return atomic_inc_return(&id); |
976 | } | |
977 | ||
04dbfea6 | 978 | /* |
ec17f452 DB |
979 | * parahotplug_next_expiration() - returns the time (in jiffies) when a |
980 | * CONTROLVM message on the list should expire | |
981 | * -- PARAHOTPLUG_TIMEOUT_MS in the future | |
982 | * | |
983 | * Return: expected expiration time (in jiffies) | |
12e364b9 KC |
984 | */ |
985 | static unsigned long | |
986 | parahotplug_next_expiration(void) | |
987 | { | |
2cc1a1b3 | 988 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
989 | } |
990 | ||
04dbfea6 | 991 | /* |
ec17f452 DB |
992 | * parahotplug_request_create() - create a parahotplug_request, which is |
993 | * basically a wrapper for a CONTROLVM_MESSAGE | |
994 | * that we can stick on a list | |
995 | * @msg: the message to insert in the request | |
996 | * | |
997 | * Return: the request containing the provided message | |
12e364b9 KC |
998 | */ |
999 | static struct parahotplug_request * | |
3ab47701 | 1000 | parahotplug_request_create(struct controlvm_message *msg) |
12e364b9 | 1001 | { |
ea0dcfcf QL |
1002 | struct parahotplug_request *req; |
1003 | ||
8c8c975f | 1004 | req = kmalloc(sizeof(*req), GFP_KERNEL); |
38f736e9 | 1005 | if (!req) |
12e364b9 KC |
1006 | return NULL; |
1007 | ||
1008 | req->id = parahotplug_next_id(); | |
1009 | req->expiration = parahotplug_next_expiration(); | |
1010 | req->msg = *msg; | |
1011 | ||
1012 | return req; | |
1013 | } | |
1014 | ||
04dbfea6 | 1015 | /* |
ec17f452 DB |
1016 | * parahotplug_request_destroy() - free a parahotplug_request |
1017 | * @req: the request to deallocate | |
12e364b9 KC |
1018 | */ |
1019 | static void | |
1020 | parahotplug_request_destroy(struct parahotplug_request *req) | |
1021 | { | |
1022 | kfree(req); | |
1023 | } | |
1024 | ||
51319662 DK |
1025 | static LIST_HEAD(parahotplug_request_list); |
1026 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); /* lock for above */ | |
1027 | ||
04dbfea6 | 1028 | /* |
ec17f452 DB |
1029 | * parahotplug_request_complete() - mark request as complete |
1030 | * @id: the id of the request | |
1031 | * @active: indicates whether the request is assigned to active partition | |
1032 | * | |
5d501ef4 | 1033 | * Called from the /sys handler, which means the user script has |
ec17f452 | 1034 | * finished the enable/disable. Find the matching identifier, and |
12e364b9 | 1035 | * respond to the CONTROLVM message with success. |
ec17f452 DB |
1036 | * |
1037 | * Return: 0 on success or -EINVAL on failure | |
12e364b9 KC |
1038 | */ |
1039 | static int | |
b06bdf7d | 1040 | parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1041 | { |
e82ba62e JS |
1042 | struct list_head *pos; |
1043 | struct list_head *tmp; | |
12e364b9 | 1044 | |
ddf5de53 | 1045 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1046 | |
1047 | /* Look for a request matching "id". */ | |
ddf5de53 | 1048 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1049 | struct parahotplug_request *req = |
1050 | list_entry(pos, struct parahotplug_request, list); | |
1051 | if (req->id == id) { | |
ec17f452 DB |
1052 | /* |
1053 | * Found a match. Remove it from the list and | |
12e364b9 KC |
1054 | * respond. |
1055 | */ | |
1056 | list_del(pos); | |
ddf5de53 | 1057 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1058 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1059 | if (req->msg.hdr.flags.response_expected) |
4c0e65f8 DK |
1060 | controlvm_respond( |
1061 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
1062 | &req->msg.cmd.device_change_state.state); | |
12e364b9 KC |
1063 | parahotplug_request_destroy(req); |
1064 | return 0; | |
1065 | } | |
1066 | } | |
1067 | ||
ddf5de53 | 1068 | spin_unlock(¶hotplug_request_list_lock); |
119296ea | 1069 | return -EINVAL; |
12e364b9 KC |
1070 | } |
1071 | ||
04dbfea6 | 1072 | /* |
ebeff055 DK |
1073 | * devicedisabled_store() - disables the hotplug device |
1074 | * @dev: sysfs interface variable not utilized in this function | |
1075 | * @attr: sysfs interface variable not utilized in this function | |
1076 | * @buf: buffer containing the device id | |
1077 | * @count: the size of the buffer | |
1078 | * | |
1079 | * The parahotplug/devicedisabled interface gets called by our support script | |
1080 | * when an SR-IOV device has been shut down. The ID is passed to the script | |
1081 | * and then passed back when the device has been removed. | |
1082 | * | |
1083 | * Return: the size of the buffer for success or negative for error | |
1084 | */ | |
1085 | static ssize_t devicedisabled_store(struct device *dev, | |
1086 | struct device_attribute *attr, | |
1087 | const char *buf, size_t count) | |
1088 | { | |
1089 | unsigned int id; | |
1090 | int err; | |
1091 | ||
1092 | if (kstrtouint(buf, 10, &id)) | |
1093 | return -EINVAL; | |
1094 | ||
1095 | err = parahotplug_request_complete(id, 0); | |
1096 | if (err < 0) | |
1097 | return err; | |
1098 | return count; | |
1099 | } | |
1100 | static DEVICE_ATTR_WO(devicedisabled); | |
1101 | ||
04dbfea6 | 1102 | /* |
ebeff055 DK |
1103 | * deviceenabled_store() - enables the hotplug device |
1104 | * @dev: sysfs interface variable not utilized in this function | |
1105 | * @attr: sysfs interface variable not utilized in this function | |
1106 | * @buf: buffer containing the device id | |
1107 | * @count: the size of the buffer | |
1108 | * | |
1109 | * The parahotplug/deviceenabled interface gets called by our support script | |
1110 | * when an SR-IOV device has been recovered. The ID is passed to the script | |
1111 | * and then passed back when the device has been brought back up. | |
1112 | * | |
1113 | * Return: the size of the buffer for success or negative for error | |
1114 | */ | |
1115 | static ssize_t deviceenabled_store(struct device *dev, | |
1116 | struct device_attribute *attr, | |
1117 | const char *buf, size_t count) | |
1118 | { | |
1119 | unsigned int id; | |
1120 | ||
1121 | if (kstrtouint(buf, 10, &id)) | |
1122 | return -EINVAL; | |
1123 | ||
1124 | parahotplug_request_complete(id, 1); | |
1125 | return count; | |
1126 | } | |
1127 | static DEVICE_ATTR_WO(deviceenabled); | |
1128 | ||
1129 | static struct attribute *visorchipset_install_attrs[] = { | |
1130 | &dev_attr_toolaction.attr, | |
1131 | &dev_attr_boottotool.attr, | |
1132 | &dev_attr_error.attr, | |
1133 | &dev_attr_textid.attr, | |
1134 | &dev_attr_remaining_steps.attr, | |
1135 | NULL | |
1136 | }; | |
1137 | ||
a2d1e428 | 1138 | static const struct attribute_group visorchipset_install_group = { |
ebeff055 DK |
1139 | .name = "install", |
1140 | .attrs = visorchipset_install_attrs | |
1141 | }; | |
1142 | ||
1143 | static struct attribute *visorchipset_parahotplug_attrs[] = { | |
1144 | &dev_attr_devicedisabled.attr, | |
1145 | &dev_attr_deviceenabled.attr, | |
1146 | NULL | |
1147 | }; | |
1148 | ||
1149 | static struct attribute_group visorchipset_parahotplug_group = { | |
1150 | .name = "parahotplug", | |
1151 | .attrs = visorchipset_parahotplug_attrs | |
1152 | }; | |
1153 | ||
1154 | static const struct attribute_group *visorchipset_dev_groups[] = { | |
1155 | &visorchipset_install_group, | |
1156 | &visorchipset_parahotplug_group, | |
1157 | NULL | |
1158 | }; | |
1159 | ||
04dbfea6 | 1160 | /* |
ebeff055 DK |
1161 | * parahotplug_request_kickoff() - initiate parahotplug request |
1162 | * @req: the request to initiate | |
1163 | * | |
1164 | * Cause uevent to run the user level script to do the disable/enable specified | |
1165 | * in the parahotplug_request. | |
1166 | */ | |
ae0fa822 | 1167 | static int |
ebeff055 DK |
1168 | parahotplug_request_kickoff(struct parahotplug_request *req) |
1169 | { | |
1170 | struct controlvm_message_packet *cmd = &req->msg.cmd; | |
1171 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], | |
1172 | env_func[40]; | |
1173 | char *envp[] = { | |
1174 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1175 | }; | |
1176 | ||
c5a28902 SW |
1177 | sprintf(env_cmd, "VISOR_PARAHOTPLUG=1"); |
1178 | sprintf(env_id, "VISOR_PARAHOTPLUG_ID=%d", req->id); | |
1179 | sprintf(env_state, "VISOR_PARAHOTPLUG_STATE=%d", | |
ebeff055 | 1180 | cmd->device_change_state.state.active); |
c5a28902 | 1181 | sprintf(env_bus, "VISOR_PARAHOTPLUG_BUS=%d", |
ebeff055 | 1182 | cmd->device_change_state.bus_no); |
c5a28902 | 1183 | sprintf(env_dev, "VISOR_PARAHOTPLUG_DEVICE=%d", |
ebeff055 | 1184 | cmd->device_change_state.dev_no >> 3); |
c5a28902 | 1185 | sprintf(env_func, "VISOR_PARAHOTPLUG_FUNCTION=%d", |
ebeff055 DK |
1186 | cmd->device_change_state.dev_no & 0x7); |
1187 | ||
ae0fa822 DK |
1188 | return kobject_uevent_env(&chipset_dev->acpi_device->dev.kobj, |
1189 | KOBJ_CHANGE, envp); | |
ebeff055 DK |
1190 | } |
1191 | ||
04dbfea6 | 1192 | /* |
ec17f452 DB |
1193 | * parahotplug_process_message() - enables or disables a PCI device by kicking |
1194 | * off a udev script | |
1195 | * @inmsg: the message indicating whether to enable or disable | |
12e364b9 | 1196 | */ |
114d5dcf | 1197 | static int |
3ab47701 | 1198 | parahotplug_process_message(struct controlvm_message *inmsg) |
12e364b9 KC |
1199 | { |
1200 | struct parahotplug_request *req; | |
ae0fa822 | 1201 | int err; |
12e364b9 KC |
1202 | |
1203 | req = parahotplug_request_create(inmsg); | |
1204 | ||
38f736e9 | 1205 | if (!req) |
114d5dcf | 1206 | return -ENOMEM; |
12e364b9 | 1207 | |
d02bde9d DK |
1208 | /* |
1209 | * For enable messages, just respond with success right away, we don't | |
1210 | * need to wait to see if the enable was successful. | |
1211 | */ | |
2ea5117b | 1212 | if (inmsg->cmd.device_change_state.state.active) { |
ae0fa822 DK |
1213 | err = parahotplug_request_kickoff(req); |
1214 | if (err) | |
1215 | goto err_respond; | |
4c0e65f8 DK |
1216 | controlvm_respond(&inmsg->hdr, CONTROLVM_RESP_SUCCESS, |
1217 | &inmsg->cmd.device_change_state.state); | |
12e364b9 | 1218 | parahotplug_request_destroy(req); |
ae0fa822 | 1219 | return 0; |
12e364b9 | 1220 | } |
ae0fa822 DK |
1221 | |
1222 | /* | |
1223 | * For disable messages, add the request to the | |
1224 | * request list before kicking off the udev script. It | |
1225 | * won't get responded to until the script has | |
1226 | * indicated it's done. | |
1227 | */ | |
1228 | spin_lock(¶hotplug_request_list_lock); | |
1229 | list_add_tail(&req->list, ¶hotplug_request_list); | |
1230 | spin_unlock(¶hotplug_request_list_lock); | |
1231 | ||
1232 | err = parahotplug_request_kickoff(req); | |
1233 | if (err) | |
1234 | goto err_respond; | |
114d5dcf | 1235 | return 0; |
ae0fa822 DK |
1236 | |
1237 | err_respond: | |
4c0e65f8 DK |
1238 | controlvm_respond(&inmsg->hdr, err, |
1239 | &inmsg->cmd.device_change_state.state); | |
ae0fa822 | 1240 | return err; |
12e364b9 KC |
1241 | } |
1242 | ||
7289a8dd DB |
1243 | /* |
1244 | * chipset_ready_uevent() - sends chipset_ready action | |
ebeff055 DK |
1245 | * |
1246 | * Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1247 | * | |
7289a8dd | 1248 | * Return: 0 on success, negative on failure |
ebeff055 DK |
1249 | */ |
1250 | static int | |
7289a8dd | 1251 | chipset_ready_uevent(struct controlvm_message_header *msg_hdr) |
ebeff055 | 1252 | { |
deeeca6d DK |
1253 | int res; |
1254 | ||
1255 | res = kobject_uevent(&chipset_dev->acpi_device->dev.kobj, | |
1256 | KOBJ_ONLINE); | |
7289a8dd DB |
1257 | |
1258 | if (msg_hdr->flags.response_expected) | |
4c0e65f8 | 1259 | controlvm_respond(msg_hdr, res, NULL); |
7289a8dd | 1260 | |
deeeca6d | 1261 | return res; |
ebeff055 DK |
1262 | } |
1263 | ||
7289a8dd DB |
1264 | /* |
1265 | * chipset_selftest_uevent() - sends chipset_selftest action | |
1266 | * | |
1267 | * Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1268 | * | |
1269 | * Return: 0 on success, negative on failure | |
1270 | */ | |
ebeff055 | 1271 | static int |
7289a8dd | 1272 | chipset_selftest_uevent(struct controlvm_message_header *msg_hdr) |
ebeff055 DK |
1273 | { |
1274 | char env_selftest[20]; | |
1275 | char *envp[] = { env_selftest, NULL }; | |
deeeca6d | 1276 | int res; |
ebeff055 DK |
1277 | |
1278 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); | |
deeeca6d DK |
1279 | res = kobject_uevent_env(&chipset_dev->acpi_device->dev.kobj, |
1280 | KOBJ_CHANGE, envp); | |
7289a8dd DB |
1281 | |
1282 | if (msg_hdr->flags.response_expected) | |
4c0e65f8 | 1283 | controlvm_respond(msg_hdr, res, NULL); |
7289a8dd | 1284 | |
deeeca6d | 1285 | return res; |
ebeff055 DK |
1286 | } |
1287 | ||
7289a8dd DB |
1288 | /* |
1289 | * chipset_notready_uevent() - sends chipset_notready action | |
ebeff055 DK |
1290 | * |
1291 | * Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1292 | * | |
7289a8dd | 1293 | * Return: 0 on success, negative on failure |
ebeff055 DK |
1294 | */ |
1295 | static int | |
7289a8dd | 1296 | chipset_notready_uevent(struct controlvm_message_header *msg_hdr) |
ebeff055 | 1297 | { |
deeeca6d | 1298 | int res; |
ebeff055 | 1299 | |
deeeca6d DK |
1300 | res = kobject_uevent(&chipset_dev->acpi_device->dev.kobj, |
1301 | KOBJ_OFFLINE); | |
ebeff055 | 1302 | if (msg_hdr->flags.response_expected) |
4c0e65f8 | 1303 | controlvm_respond(msg_hdr, res, NULL); |
ebeff055 | 1304 | |
deeeca6d | 1305 | return res; |
ebeff055 DK |
1306 | } |
1307 | ||
88845f40 DK |
1308 | static int unisys_vmcall(unsigned long tuple, unsigned long param) |
1309 | { | |
1310 | int result = 0; | |
1311 | unsigned int cpuid_eax, cpuid_ebx, cpuid_ecx, cpuid_edx; | |
1312 | unsigned long reg_ebx; | |
1313 | unsigned long reg_ecx; | |
1314 | ||
1315 | reg_ebx = param & 0xFFFFFFFF; | |
1316 | reg_ecx = param >> 32; | |
1317 | ||
1318 | cpuid(0x00000001, &cpuid_eax, &cpuid_ebx, &cpuid_ecx, &cpuid_edx); | |
1319 | if (!(cpuid_ecx & 0x80000000)) | |
1320 | return -EPERM; | |
1321 | ||
1322 | __asm__ __volatile__(".byte 0x00f, 0x001, 0x0c1" : "=a"(result) : | |
1323 | "a"(tuple), "b"(reg_ebx), "c"(reg_ecx)); | |
1324 | ||
bd801a07 DK |
1325 | if (result) |
1326 | goto error; | |
1327 | ||
1328 | return 0; | |
1329 | ||
1330 | error: /* Need to convert from VMCALL error codes to Linux */ | |
1331 | switch (result) { | |
1332 | case VMCALL_RESULT_INVALID_PARAM: | |
1333 | return -EINVAL; | |
1334 | case VMCALL_RESULT_DATA_UNAVAILABLE: | |
1335 | return -ENODEV; | |
1336 | default: | |
1337 | return -EFAULT; | |
1338 | } | |
88845f40 | 1339 | } |
7d91a1f1 | 1340 | static unsigned int |
5f3a7e36 DK |
1341 | issue_vmcall_io_controlvm_addr(u64 *control_addr, u32 *control_bytes) |
1342 | { | |
bb1fb8ac SW |
1343 | chipset_dev->controlvm_addr.physaddr = virt_to_phys( |
1344 | &chipset_dev->controlvm_addr.params); | |
1345 | chipset_dev->controlvm_addr.err = unisys_vmcall(VMCALL_CONTROLVM_ADDR, | |
1346 | chipset_dev->controlvm_addr.physaddr); | |
1347 | if (chipset_dev->controlvm_addr.err) | |
1348 | return chipset_dev->controlvm_addr.err; | |
5f3a7e36 | 1349 | |
bb1fb8ac SW |
1350 | *control_addr = chipset_dev->controlvm_addr.params.address; |
1351 | *control_bytes = chipset_dev->controlvm_addr.params.channel_bytes; | |
bd801a07 DK |
1352 | |
1353 | return 0; | |
5f3a7e36 DK |
1354 | } |
1355 | ||
d5b3f1dc | 1356 | static u64 controlvm_get_channel_address(void) |
524b0b63 | 1357 | { |
5fc0229a | 1358 | u64 addr = 0; |
b3c55b13 | 1359 | u32 size = 0; |
524b0b63 | 1360 | |
bd801a07 | 1361 | if (issue_vmcall_io_controlvm_addr(&addr, &size)) |
524b0b63 | 1362 | return 0; |
0aca7844 | 1363 | |
524b0b63 BR |
1364 | return addr; |
1365 | } | |
1366 | ||
12e364b9 KC |
1367 | static void |
1368 | setup_crash_devices_work_queue(struct work_struct *work) | |
1369 | { | |
e6bdb904 BR |
1370 | struct controlvm_message local_crash_bus_msg; |
1371 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 1372 | struct controlvm_message msg; |
e6bdb904 BR |
1373 | u32 local_crash_msg_offset; |
1374 | u16 local_crash_msg_count; | |
12e364b9 | 1375 | |
12e364b9 | 1376 | /* send init chipset msg */ |
98d7b594 | 1377 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
1378 | msg.cmd.init_chipset.bus_count = 23; |
1379 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
1380 | |
1381 | chipset_init(&msg); | |
1382 | ||
12e364b9 | 1383 | /* get saved message count */ |
765b2f82 | 1384 | if (visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 1385 | offsetof(struct visor_controlvm_channel, |
d19642f6 | 1386 | saved_crash_message_count), |
e6bdb904 | 1387 | &local_crash_msg_count, sizeof(u16)) < 0) { |
0f7453af DK |
1388 | dev_err(&chipset_dev->acpi_device->dev, |
1389 | "failed to read channel\n"); | |
12e364b9 KC |
1390 | return; |
1391 | } | |
1392 | ||
e6bdb904 | 1393 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
0f7453af DK |
1394 | dev_err(&chipset_dev->acpi_device->dev, |
1395 | "invalid count\n"); | |
12e364b9 KC |
1396 | return; |
1397 | } | |
1398 | ||
1399 | /* get saved crash message offset */ | |
765b2f82 | 1400 | if (visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 1401 | offsetof(struct visor_controlvm_channel, |
d19642f6 | 1402 | saved_crash_message_offset), |
e6bdb904 | 1403 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
0f7453af DK |
1404 | dev_err(&chipset_dev->acpi_device->dev, |
1405 | "failed to read channel\n"); | |
12e364b9 KC |
1406 | return; |
1407 | } | |
1408 | ||
1409 | /* read create device message for storage bus offset */ | |
765b2f82 | 1410 | if (visorchannel_read(chipset_dev->controlvm_channel, |
e6bdb904 BR |
1411 | local_crash_msg_offset, |
1412 | &local_crash_bus_msg, | |
3ab47701 | 1413 | sizeof(struct controlvm_message)) < 0) { |
0f7453af DK |
1414 | dev_err(&chipset_dev->acpi_device->dev, |
1415 | "failed to read channel\n"); | |
12e364b9 KC |
1416 | return; |
1417 | } | |
1418 | ||
1419 | /* read create device message for storage device */ | |
765b2f82 | 1420 | if (visorchannel_read(chipset_dev->controlvm_channel, |
e6bdb904 | 1421 | local_crash_msg_offset + |
3ab47701 | 1422 | sizeof(struct controlvm_message), |
e6bdb904 | 1423 | &local_crash_dev_msg, |
3ab47701 | 1424 | sizeof(struct controlvm_message)) < 0) { |
0f7453af DK |
1425 | dev_err(&chipset_dev->acpi_device->dev, |
1426 | "failed to read channel\n"); | |
12e364b9 KC |
1427 | return; |
1428 | } | |
1429 | ||
1430 | /* reuse IOVM create bus message */ | |
d9b89ef1 | 1431 | if (!local_crash_bus_msg.cmd.create_bus.channel_addr) { |
0f7453af DK |
1432 | dev_err(&chipset_dev->acpi_device->dev, |
1433 | "no valid create_bus message\n"); | |
12e364b9 KC |
1434 | return; |
1435 | } | |
ec17cb8a | 1436 | visorbus_create(&local_crash_bus_msg); |
12e364b9 KC |
1437 | |
1438 | /* reuse create device message for storage device */ | |
d9b89ef1 | 1439 | if (!local_crash_dev_msg.cmd.create_device.channel_addr) { |
0f7453af DK |
1440 | dev_err(&chipset_dev->acpi_device->dev, |
1441 | "no valid create_device message\n"); | |
12e364b9 KC |
1442 | return; |
1443 | } | |
8b0a6cfa | 1444 | visorbus_device_create(&local_crash_dev_msg); |
12e364b9 KC |
1445 | } |
1446 | ||
87241ab8 | 1447 | void |
63847f17 | 1448 | visorbus_create_response(struct visor_device *bus_info, int response) |
12e364b9 | 1449 | { |
4b4fd43a | 1450 | if (response >= 0) |
0274b5ae | 1451 | bus_info->state.created = 1; |
0274b5ae | 1452 | |
4fb2539c DK |
1453 | controlvm_responder(CONTROLVM_BUS_CREATE, bus_info->pending_msg_hdr, |
1454 | response); | |
0274b5ae DZ |
1455 | |
1456 | kfree(bus_info->pending_msg_hdr); | |
1457 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1458 | } |
1459 | ||
87241ab8 | 1460 | void |
63847f17 | 1461 | visorbus_destroy_response(struct visor_device *bus_info, int response) |
12e364b9 | 1462 | { |
4fb2539c DK |
1463 | controlvm_responder(CONTROLVM_BUS_DESTROY, bus_info->pending_msg_hdr, |
1464 | response); | |
0274b5ae DZ |
1465 | |
1466 | kfree(bus_info->pending_msg_hdr); | |
1467 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1468 | } |
1469 | ||
87241ab8 | 1470 | void |
f8b5a21f | 1471 | visorbus_device_create_response(struct visor_device *dev_info, int response) |
12e364b9 | 1472 | { |
0274b5ae DZ |
1473 | if (response >= 0) |
1474 | dev_info->state.created = 1; | |
1475 | ||
4fb2539c DK |
1476 | controlvm_responder(CONTROLVM_DEVICE_CREATE, dev_info->pending_msg_hdr, |
1477 | response); | |
0274b5ae DZ |
1478 | |
1479 | kfree(dev_info->pending_msg_hdr); | |
addce19f | 1480 | dev_info->pending_msg_hdr = NULL; |
12e364b9 KC |
1481 | } |
1482 | ||
87241ab8 | 1483 | void |
f8b5a21f | 1484 | visorbus_device_destroy_response(struct visor_device *dev_info, int response) |
12e364b9 | 1485 | { |
4fb2539c DK |
1486 | controlvm_responder(CONTROLVM_DEVICE_DESTROY, dev_info->pending_msg_hdr, |
1487 | response); | |
0274b5ae DZ |
1488 | |
1489 | kfree(dev_info->pending_msg_hdr); | |
1490 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1491 | } |
1492 | ||
87241ab8 | 1493 | void |
f8b5a21f | 1494 | visorbus_device_pause_response(struct visor_device *dev_info, int response) |
12e364b9 | 1495 | { |
12e364b9 | 1496 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
b4b598fd | 1497 | dev_info, response, |
bd0d2dcc | 1498 | segment_state_standby); |
0274b5ae DZ |
1499 | |
1500 | kfree(dev_info->pending_msg_hdr); | |
1501 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 | 1502 | } |
12e364b9 | 1503 | |
87241ab8 | 1504 | void |
f8b5a21f | 1505 | visorbus_device_resume_response(struct visor_device *dev_info, int response) |
12e364b9 KC |
1506 | { |
1507 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
b4b598fd | 1508 | dev_info, response, |
bd0d2dcc | 1509 | segment_state_running); |
0274b5ae DZ |
1510 | |
1511 | kfree(dev_info->pending_msg_hdr); | |
1512 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1513 | } |
1514 | ||
612b81c9 DK |
1515 | static struct parser_context * |
1516 | parser_init_byte_stream(u64 addr, u32 bytes, bool local, bool *retry) | |
1517 | { | |
1518 | int allocbytes = sizeof(struct parser_context) + bytes; | |
1519 | struct parser_context *ctx; | |
1520 | ||
3e4273db | 1521 | *retry = false; |
612b81c9 DK |
1522 | |
1523 | /* | |
1524 | * alloc an 0 extra byte to ensure payload is | |
1525 | * '\0'-terminated | |
1526 | */ | |
1527 | allocbytes++; | |
765b2f82 | 1528 | if ((chipset_dev->controlvm_payload_bytes_buffered + bytes) |
612b81c9 | 1529 | > MAX_CONTROLVM_PAYLOAD_BYTES) { |
3e4273db | 1530 | *retry = true; |
612b81c9 DK |
1531 | return NULL; |
1532 | } | |
8c8c975f | 1533 | ctx = kzalloc(allocbytes, GFP_KERNEL); |
612b81c9 | 1534 | if (!ctx) { |
3e4273db | 1535 | *retry = true; |
612b81c9 DK |
1536 | return NULL; |
1537 | } | |
1538 | ||
1539 | ctx->allocbytes = allocbytes; | |
1540 | ctx->param_bytes = bytes; | |
1541 | ctx->curr = NULL; | |
1542 | ctx->bytes_remaining = 0; | |
1543 | ctx->byte_stream = false; | |
1544 | if (local) { | |
1545 | void *p; | |
1546 | ||
1547 | if (addr > virt_to_phys(high_memory - 1)) | |
1548 | goto err_finish_ctx; | |
1549 | p = __va((unsigned long)(addr)); | |
1550 | memcpy(ctx->data, p, bytes); | |
1551 | } else { | |
1552 | void *mapping = memremap(addr, bytes, MEMREMAP_WB); | |
1553 | ||
1554 | if (!mapping) | |
1555 | goto err_finish_ctx; | |
1556 | memcpy(ctx->data, mapping, bytes); | |
1557 | memunmap(mapping); | |
1558 | } | |
1559 | ||
1560 | ctx->byte_stream = true; | |
765b2f82 | 1561 | chipset_dev->controlvm_payload_bytes_buffered += ctx->param_bytes; |
612b81c9 DK |
1562 | |
1563 | return ctx; | |
1564 | ||
1565 | err_finish_ctx: | |
1566 | parser_done(ctx); | |
1567 | return NULL; | |
1568 | } | |
1569 | ||
04dbfea6 | 1570 | /* |
511474a5 DK |
1571 | * handle_command() - process a controlvm message |
1572 | * @inmsg: the message to process | |
1573 | * @channel_addr: address of the controlvm channel | |
1574 | * | |
1575 | * Return: | |
25a5128e DK |
1576 | * 0 - Successfully processed the message |
1577 | * -EAGAIN - ControlVM message was not processed and should be retried | |
1578 | * reading the next controlvm message; a scenario where this can | |
1579 | * occur is when we need to throttle the allocation of memory in | |
1580 | * which to copy out controlvm payload data. | |
1581 | * < 0 - error: ControlVM message was processed but an error occurred. | |
511474a5 | 1582 | */ |
25a5128e | 1583 | static int |
511474a5 DK |
1584 | handle_command(struct controlvm_message inmsg, u64 channel_addr) |
1585 | { | |
1586 | struct controlvm_message_packet *cmd = &inmsg.cmd; | |
1587 | u64 parm_addr; | |
1588 | u32 parm_bytes; | |
1589 | struct parser_context *parser_ctx = NULL; | |
1590 | bool local_addr; | |
1591 | struct controlvm_message ackmsg; | |
25a5128e | 1592 | int err = 0; |
511474a5 DK |
1593 | |
1594 | /* create parsing context if necessary */ | |
1595 | local_addr = (inmsg.hdr.flags.test_message == 1); | |
1596 | if (channel_addr == 0) | |
25a5128e DK |
1597 | return -EINVAL; |
1598 | ||
511474a5 DK |
1599 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; |
1600 | parm_bytes = inmsg.hdr.payload_bytes; | |
1601 | ||
1602 | /* | |
1603 | * Parameter and channel addresses within test messages actually lie | |
1604 | * within our OS-controlled memory. We need to know that, because it | |
1605 | * makes a difference in how we compute the virtual address. | |
1606 | */ | |
1607 | if (parm_addr && parm_bytes) { | |
1608 | bool retry = false; | |
1609 | ||
1610 | parser_ctx = | |
1611 | parser_init_byte_stream(parm_addr, parm_bytes, | |
1612 | local_addr, &retry); | |
1613 | if (!parser_ctx && retry) | |
25a5128e | 1614 | return -EAGAIN; |
511474a5 DK |
1615 | } |
1616 | ||
1617 | if (!local_addr) { | |
1618 | controlvm_init_response(&ackmsg, &inmsg.hdr, | |
1619 | CONTROLVM_RESP_SUCCESS); | |
25a5128e DK |
1620 | err = visorchannel_signalinsert(chipset_dev->controlvm_channel, |
1621 | CONTROLVM_QUEUE_ACK, | |
1622 | &ackmsg); | |
1623 | if (err) | |
1624 | return err; | |
511474a5 DK |
1625 | } |
1626 | switch (inmsg.hdr.id) { | |
1627 | case CONTROLVM_CHIPSET_INIT: | |
25a5128e | 1628 | err = chipset_init(&inmsg); |
511474a5 DK |
1629 | break; |
1630 | case CONTROLVM_BUS_CREATE: | |
ec17cb8a | 1631 | err = visorbus_create(&inmsg); |
511474a5 DK |
1632 | break; |
1633 | case CONTROLVM_BUS_DESTROY: | |
ec17cb8a | 1634 | err = visorbus_destroy(&inmsg); |
511474a5 DK |
1635 | break; |
1636 | case CONTROLVM_BUS_CONFIGURE: | |
ec17cb8a | 1637 | err = visorbus_configure(&inmsg, parser_ctx); |
511474a5 DK |
1638 | break; |
1639 | case CONTROLVM_DEVICE_CREATE: | |
8b0a6cfa | 1640 | err = visorbus_device_create(&inmsg); |
511474a5 DK |
1641 | break; |
1642 | case CONTROLVM_DEVICE_CHANGESTATE: | |
1643 | if (cmd->device_change_state.flags.phys_device) { | |
25a5128e | 1644 | err = parahotplug_process_message(&inmsg); |
511474a5 DK |
1645 | } else { |
1646 | /* | |
1647 | * save the hdr and cmd structures for later use | |
1648 | * when sending back the response to Command | |
1649 | */ | |
8b0a6cfa | 1650 | err = visorbus_device_changestate(&inmsg); |
511474a5 DK |
1651 | break; |
1652 | } | |
1653 | break; | |
1654 | case CONTROLVM_DEVICE_DESTROY: | |
8b0a6cfa | 1655 | err = visorbus_device_destroy(&inmsg); |
511474a5 DK |
1656 | break; |
1657 | case CONTROLVM_DEVICE_CONFIGURE: | |
25a5128e | 1658 | /* no op just send a respond that we passed */ |
511474a5 | 1659 | if (inmsg.hdr.flags.response_expected) |
4c0e65f8 DK |
1660 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS, |
1661 | NULL); | |
511474a5 DK |
1662 | break; |
1663 | case CONTROLVM_CHIPSET_READY: | |
25a5128e | 1664 | err = chipset_ready_uevent(&inmsg.hdr); |
511474a5 DK |
1665 | break; |
1666 | case CONTROLVM_CHIPSET_SELFTEST: | |
25a5128e | 1667 | err = chipset_selftest_uevent(&inmsg.hdr); |
511474a5 DK |
1668 | break; |
1669 | case CONTROLVM_CHIPSET_STOP: | |
25a5128e | 1670 | err = chipset_notready_uevent(&inmsg.hdr); |
511474a5 DK |
1671 | break; |
1672 | default: | |
25a5128e | 1673 | err = -ENOMSG; |
511474a5 | 1674 | if (inmsg.hdr.flags.response_expected) |
25a5128e | 1675 | controlvm_respond(&inmsg.hdr, |
4c0e65f8 | 1676 | -CONTROLVM_RESP_ID_UNKNOWN, NULL); |
511474a5 DK |
1677 | break; |
1678 | } | |
1679 | ||
1680 | if (parser_ctx) { | |
1681 | parser_done(parser_ctx); | |
1682 | parser_ctx = NULL; | |
1683 | } | |
25a5128e | 1684 | return err; |
511474a5 DK |
1685 | } |
1686 | ||
04dbfea6 | 1687 | /* |
8a285327 DK |
1688 | * read_controlvm_event() - retreives the next message from the |
1689 | * CONTROLVM_QUEUE_EVENT queue in the controlvm | |
1690 | * channel | |
1691 | * @msg: pointer to the retrieved message | |
1692 | * | |
25a5128e | 1693 | * Return: 0 if valid message was retrieved or -error |
8a285327 | 1694 | */ |
25a5128e | 1695 | static int |
8a285327 DK |
1696 | read_controlvm_event(struct controlvm_message *msg) |
1697 | { | |
25a5128e DK |
1698 | int err; |
1699 | ||
1700 | err = visorchannel_signalremove(chipset_dev->controlvm_channel, | |
1701 | CONTROLVM_QUEUE_EVENT, msg); | |
1702 | if (err) | |
1703 | return err; | |
1704 | ||
1705 | /* got a message */ | |
1706 | if (msg->hdr.flags.test_message == 1) | |
1707 | return -EINVAL; | |
1708 | ||
1709 | return 0; | |
8a285327 DK |
1710 | } |
1711 | ||
04dbfea6 | 1712 | /* |
a9c73937 DK |
1713 | * parahotplug_process_list() - remove any request from the list that's been on |
1714 | * there too long and respond with an error | |
1715 | */ | |
1716 | static void | |
1717 | parahotplug_process_list(void) | |
1718 | { | |
1719 | struct list_head *pos; | |
1720 | struct list_head *tmp; | |
1721 | ||
1722 | spin_lock(¶hotplug_request_list_lock); | |
1723 | ||
1724 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { | |
1725 | struct parahotplug_request *req = | |
1726 | list_entry(pos, struct parahotplug_request, list); | |
1727 | ||
1728 | if (!time_after_eq(jiffies, req->expiration)) | |
1729 | continue; | |
1730 | ||
1731 | list_del(pos); | |
1732 | if (req->msg.hdr.flags.response_expected) | |
4c0e65f8 | 1733 | controlvm_respond( |
a9c73937 | 1734 | &req->msg.hdr, |
98f9ed9e | 1735 | CONTROLVM_RESP_DEVICE_UDEV_TIMEOUT, |
4c0e65f8 | 1736 | &req->msg.cmd.device_change_state.state); |
a9c73937 DK |
1737 | parahotplug_request_destroy(req); |
1738 | } | |
1739 | ||
1740 | spin_unlock(¶hotplug_request_list_lock); | |
1741 | } | |
1742 | ||
3d8394c8 DK |
1743 | static void |
1744 | controlvm_periodic_work(struct work_struct *work) | |
1745 | { | |
1746 | struct controlvm_message inmsg; | |
04dbc09b | 1747 | int count = 0; |
fbc1023a DK |
1748 | int err; |
1749 | ||
1750 | /* Drain the RESPONSE queue make it empty */ | |
1751 | do { | |
1752 | err = visorchannel_signalremove(chipset_dev->controlvm_channel, | |
1753 | CONTROLVM_QUEUE_RESPONSE, | |
1754 | &inmsg); | |
04dbc09b | 1755 | } while ((!err) && (++count < CONTROLVM_MESSAGE_MAX)); |
fbc1023a DK |
1756 | |
1757 | if (err != -EAGAIN) | |
1758 | goto schedule_out; | |
1759 | ||
1760 | if (chipset_dev->controlvm_pending_msg_valid) { | |
1761 | /* | |
1762 | * we throttled processing of a prior | |
1763 | * msg, so try to process it again | |
1764 | * rather than reading a new one | |
1765 | */ | |
1766 | inmsg = chipset_dev->controlvm_pending_msg; | |
1767 | chipset_dev->controlvm_pending_msg_valid = false; | |
1768 | err = 0; | |
1769 | } else { | |
1770 | err = read_controlvm_event(&inmsg); | |
3d8394c8 DK |
1771 | } |
1772 | ||
fbc1023a | 1773 | while (!err) { |
765b2f82 | 1774 | chipset_dev->most_recent_message_jiffies = jiffies; |
fbc1023a DK |
1775 | err = handle_command(inmsg, |
1776 | visorchannel_get_physaddr | |
1777 | (chipset_dev->controlvm_channel)); | |
1778 | if (err == -EAGAIN) { | |
765b2f82 SW |
1779 | chipset_dev->controlvm_pending_msg = inmsg; |
1780 | chipset_dev->controlvm_pending_msg_valid = true; | |
fbc1023a | 1781 | break; |
3d8394c8 | 1782 | } |
fbc1023a DK |
1783 | |
1784 | err = read_controlvm_event(&inmsg); | |
3d8394c8 DK |
1785 | } |
1786 | ||
1787 | /* parahotplug_worker */ | |
1788 | parahotplug_process_list(); | |
1789 | ||
fbc1023a | 1790 | schedule_out: |
765b2f82 SW |
1791 | if (time_after(jiffies, chipset_dev->most_recent_message_jiffies + |
1792 | (HZ * MIN_IDLE_SECONDS))) { | |
3d8394c8 DK |
1793 | /* |
1794 | * it's been longer than MIN_IDLE_SECONDS since we | |
1795 | * processed our last controlvm message; slow down the | |
1796 | * polling | |
1797 | */ | |
765b2f82 SW |
1798 | if (chipset_dev->poll_jiffies != |
1799 | POLLJIFFIES_CONTROLVMCHANNEL_SLOW) | |
1800 | chipset_dev->poll_jiffies = | |
1801 | POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
3d8394c8 | 1802 | } else { |
765b2f82 SW |
1803 | if (chipset_dev->poll_jiffies != |
1804 | POLLJIFFIES_CONTROLVMCHANNEL_FAST) | |
1805 | chipset_dev->poll_jiffies = | |
1806 | POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
3d8394c8 DK |
1807 | } |
1808 | ||
765b2f82 SW |
1809 | schedule_delayed_work(&chipset_dev->periodic_controlvm_work, |
1810 | chipset_dev->poll_jiffies); | |
3d8394c8 DK |
1811 | } |
1812 | ||
55c67dca PB |
1813 | static int |
1814 | visorchipset_init(struct acpi_device *acpi_device) | |
12e364b9 | 1815 | { |
1366a3db | 1816 | int err = -ENODEV; |
d5b3f1dc | 1817 | u64 addr; |
c5a28902 | 1818 | uuid_le uuid = VISOR_CONTROLVM_CHANNEL_UUID; |
765b2f82 | 1819 | struct visorchannel *controlvm_channel; |
d3368a58 | 1820 | |
765b2f82 SW |
1821 | chipset_dev = kzalloc(sizeof(*chipset_dev), GFP_KERNEL); |
1822 | if (!chipset_dev) | |
1366a3db DK |
1823 | goto error; |
1824 | ||
bb1fb8ac SW |
1825 | addr = controlvm_get_channel_address(); |
1826 | if (!addr) | |
1827 | goto error; | |
1828 | ||
765b2f82 SW |
1829 | acpi_device->driver_data = chipset_dev; |
1830 | ||
1831 | chipset_dev->acpi_device = acpi_device; | |
1832 | chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
1833 | controlvm_channel = visorchannel_create_with_lock(addr, | |
1834 | 0, GFP_KERNEL, uuid); | |
1835 | ||
1836 | if (!controlvm_channel) | |
1837 | goto error_free_chipset_dev; | |
1838 | ||
1839 | chipset_dev->controlvm_channel = controlvm_channel; | |
15c012d5 SW |
1840 | |
1841 | err = sysfs_create_groups(&chipset_dev->acpi_device->dev.kobj, | |
1842 | visorchipset_dev_groups); | |
1843 | if (err < 0) | |
1844 | goto error_destroy_channel; | |
1845 | ||
c5a28902 | 1846 | if (!VISOR_CONTROLVM_CHANNEL_OK_CLIENT( |
d308d2b5 | 1847 | visorchannel_get_header(controlvm_channel))) |
15c012d5 | 1848 | goto error_delete_groups; |
8a1182eb | 1849 | |
4da3336c DK |
1850 | /* if booting in a crash kernel */ |
1851 | if (is_kdump_kernel()) | |
765b2f82 | 1852 | INIT_DELAYED_WORK(&chipset_dev->periodic_controlvm_work, |
4da3336c DK |
1853 | setup_crash_devices_work_queue); |
1854 | else | |
765b2f82 | 1855 | INIT_DELAYED_WORK(&chipset_dev->periodic_controlvm_work, |
4da3336c | 1856 | controlvm_periodic_work); |
4da3336c | 1857 | |
765b2f82 SW |
1858 | chipset_dev->most_recent_message_jiffies = jiffies; |
1859 | chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
1860 | schedule_delayed_work(&chipset_dev->periodic_controlvm_work, | |
1861 | chipset_dev->poll_jiffies); | |
12e364b9 | 1862 | |
1366a3db DK |
1863 | err = visorbus_init(); |
1864 | if (err < 0) | |
15c012d5 | 1865 | goto error_cancel_work; |
12e364b9 | 1866 | |
1366a3db DK |
1867 | return 0; |
1868 | ||
1366a3db | 1869 | error_cancel_work: |
765b2f82 | 1870 | cancel_delayed_work_sync(&chipset_dev->periodic_controlvm_work); |
1366a3db | 1871 | |
15c012d5 SW |
1872 | error_delete_groups: |
1873 | sysfs_remove_groups(&chipset_dev->acpi_device->dev.kobj, | |
1874 | visorchipset_dev_groups); | |
1875 | ||
1366a3db | 1876 | error_destroy_channel: |
765b2f82 SW |
1877 | visorchannel_destroy(chipset_dev->controlvm_channel); |
1878 | ||
1879 | error_free_chipset_dev: | |
1880 | kfree(chipset_dev); | |
1366a3db DK |
1881 | |
1882 | error: | |
372b9f22 | 1883 | dev_err(&acpi_device->dev, "failed with error %d\n", err); |
1366a3db | 1884 | return err; |
e3420ed6 EA |
1885 | } |
1886 | ||
55c67dca PB |
1887 | static int |
1888 | visorchipset_exit(struct acpi_device *acpi_device) | |
12e364b9 | 1889 | { |
c79b28f7 | 1890 | visorbus_exit(); |
765b2f82 | 1891 | cancel_delayed_work_sync(&chipset_dev->periodic_controlvm_work); |
15c012d5 SW |
1892 | sysfs_remove_groups(&chipset_dev->acpi_device->dev.kobj, |
1893 | visorchipset_dev_groups); | |
1894 | ||
765b2f82 | 1895 | visorchannel_destroy(chipset_dev->controlvm_channel); |
765b2f82 SW |
1896 | kfree(chipset_dev); |
1897 | ||
55c67dca PB |
1898 | return 0; |
1899 | } | |
1900 | ||
1901 | static const struct acpi_device_id unisys_device_ids[] = { | |
1902 | {"PNP0A07", 0}, | |
1903 | {"", 0}, | |
1904 | }; | |
55c67dca PB |
1905 | |
1906 | static struct acpi_driver unisys_acpi_driver = { | |
1907 | .name = "unisys_acpi", | |
1908 | .class = "unisys_acpi_class", | |
1909 | .owner = THIS_MODULE, | |
1910 | .ids = unisys_device_ids, | |
1911 | .ops = { | |
1912 | .add = visorchipset_init, | |
1913 | .remove = visorchipset_exit, | |
027b03e7 | 1914 | }, |
55c67dca | 1915 | }; |
1fc07f99 DK |
1916 | |
1917 | MODULE_DEVICE_TABLE(acpi, unisys_device_ids); | |
1918 | ||
c1d28da7 | 1919 | static __init int visorutil_spar_detect(void) |
d5b3f1dc EA |
1920 | { |
1921 | unsigned int eax, ebx, ecx, edx; | |
1922 | ||
0c9f3536 | 1923 | if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) { |
d5b3f1dc | 1924 | /* check the ID */ |
a27ded92 SW |
1925 | cpuid(UNISYS_VISOR_LEAF_ID, &eax, &ebx, &ecx, &edx); |
1926 | return (ebx == UNISYS_VISOR_ID_EBX) && | |
1927 | (ecx == UNISYS_VISOR_ID_ECX) && | |
1928 | (edx == UNISYS_VISOR_ID_EDX); | |
d5b3f1dc EA |
1929 | } else { |
1930 | return 0; | |
1931 | } | |
1932 | } | |
55c67dca PB |
1933 | |
1934 | static int init_unisys(void) | |
1935 | { | |
1936 | int result; | |
35e606de | 1937 | |
d5b3f1dc | 1938 | if (!visorutil_spar_detect()) |
55c67dca PB |
1939 | return -ENODEV; |
1940 | ||
1941 | result = acpi_bus_register_driver(&unisys_acpi_driver); | |
1942 | if (result) | |
1943 | return -ENODEV; | |
1944 | ||
1945 | pr_info("Unisys Visorchipset Driver Loaded.\n"); | |
1946 | return 0; | |
1947 | }; | |
1948 | ||
1949 | static void exit_unisys(void) | |
1950 | { | |
1951 | acpi_bus_unregister_driver(&unisys_acpi_driver); | |
12e364b9 KC |
1952 | } |
1953 | ||
55c67dca PB |
1954 | module_init(init_unisys); |
1955 | module_exit(exit_unisys); | |
12e364b9 KC |
1956 | |
1957 | MODULE_AUTHOR("Unisys"); | |
1958 | MODULE_LICENSE("GPL"); | |
bff8c1a1 | 1959 | MODULE_DESCRIPTION("s-Par visorbus driver for virtual device buses"); |