Commit | Line | Data |
---|---|---|
e517857b | 1 | /* |
6f14cc18 | 2 | * Copyright (C) 2010 - 2015 UNISYS CORPORATION |
12e364b9 KC |
3 | * All rights reserved. |
4 | * | |
6f14cc18 BR |
5 | * This program is free software; you can redistribute it and/or modify it |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
12e364b9 KC |
8 | * |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
12 | * NON INFRINGEMENT. See the GNU General Public License for more | |
13 | * details. | |
14 | */ | |
15 | ||
55c67dca | 16 | #include <linux/acpi.h> |
1ba00980 | 17 | #include <linux/crash_dump.h> |
12e364b9 | 18 | |
55c67dca PB |
19 | #include "visorbus.h" |
20 | #include "visorbus_private.h" | |
21 | ||
f79e1dfd DK |
22 | /* {72120008-4AAB-11DC-8530-444553544200} */ |
23 | #define VISOR_SIOVM_GUID \ | |
24 | GUID_INIT(0x72120008, 0x4AAB, 0x11DC, \ | |
25 | 0x85, 0x30, 0x44, 0x45, 0x53, 0x54, 0x42, 0x00) | |
26 | ||
b32c5cb8 AS |
27 | static const guid_t visor_vhba_channel_guid = VISOR_VHBA_CHANNEL_GUID; |
28 | static const guid_t visor_siovm_guid = VISOR_SIOVM_GUID; | |
29 | static const guid_t visor_controlvm_channel_guid = VISOR_CONTROLVM_CHANNEL_GUID; | |
30 | ||
ccc0d7bf | 31 | #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 |
12e364b9 KC |
32 | #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 |
33 | ||
2c7e1d4e | 34 | #define MAX_CONTROLVM_PAYLOAD_BYTES (1024 * 128) |
2ee0deec | 35 | |
a27ded92 | 36 | #define UNISYS_VISOR_LEAF_ID 0x40000000 |
d5b3f1dc EA |
37 | |
38 | /* The s-Par leaf ID returns "UnisysSpar64" encoded across ebx, ecx, edx */ | |
a27ded92 SW |
39 | #define UNISYS_VISOR_ID_EBX 0x73696e55 |
40 | #define UNISYS_VISOR_ID_ECX 0x70537379 | |
41 | #define UNISYS_VISOR_ID_EDX 0x34367261 | |
d5b3f1dc | 42 | |
ec17f452 DB |
43 | /* |
44 | * When the controlvm channel is idle for at least MIN_IDLE_SECONDS, | |
45 | * we switch to slow polling mode. As soon as we get a controlvm | |
46 | * message, we switch back to fast polling mode. | |
47 | */ | |
12e364b9 | 48 | #define MIN_IDLE_SECONDS 10 |
12e364b9 | 49 | |
46168810 EA |
50 | struct parser_context { |
51 | unsigned long allocbytes; | |
52 | unsigned long param_bytes; | |
53 | u8 *curr; | |
54 | unsigned long bytes_remaining; | |
55 | bool byte_stream; | |
56 | char data[0]; | |
57 | }; | |
58 | ||
12cbd490 | 59 | /* VMCALL_CONTROLVM_ADDR: Used by all guests, not just IO. */ |
c8684a9d DB |
60 | #define VMCALL_CONTROLVM_ADDR 0x0501 |
61 | ||
62 | enum vmcall_result { | |
63 | VMCALL_RESULT_SUCCESS = 0, | |
64 | VMCALL_RESULT_INVALID_PARAM = 1, | |
65 | VMCALL_RESULT_DATA_UNAVAILABLE = 2, | |
66 | VMCALL_RESULT_FAILURE_UNAVAILABLE = 3, | |
67 | VMCALL_RESULT_DEVICE_ERROR = 4, | |
68 | VMCALL_RESULT_DEVICE_NOT_READY = 5 | |
69 | }; | |
70 | ||
71 | /* | |
72 | * struct vmcall_io_controlvm_addr_params - Structure for IO VMCALLS. Has | |
73 | * parameters to VMCALL_CONTROLVM_ADDR | |
74 | * interface. | |
75 | * @address: The Guest-relative physical address of the ControlVm channel. | |
76 | * This VMCall fills this in with the appropriate address. | |
77 | * Contents provided by this VMCALL (OUT). | |
78 | * @channel_bytes: The size of the ControlVm channel in bytes This VMCall fills | |
79 | * this in with the appropriate address. Contents provided by | |
80 | * this VMCALL (OUT). | |
81 | * @unused: Unused Bytes in the 64-Bit Aligned Struct. | |
82 | */ | |
83 | struct vmcall_io_controlvm_addr_params { | |
84 | u64 address; | |
85 | u32 channel_bytes; | |
86 | u8 unused[4]; | |
87 | } __packed; | |
88 | ||
765b2f82 SW |
89 | struct visorchipset_device { |
90 | struct acpi_device *acpi_device; | |
91 | unsigned long poll_jiffies; | |
92 | /* when we got our last controlvm message */ | |
93 | unsigned long most_recent_message_jiffies; | |
94 | struct delayed_work periodic_controlvm_work; | |
765b2f82 SW |
95 | struct visorchannel *controlvm_channel; |
96 | unsigned long controlvm_payload_bytes_buffered; | |
97 | /* | |
98 | * The following variables are used to handle the scenario where we are | |
99 | * unable to offload the payload from a controlvm message due to memory | |
100 | * requirements. In this scenario, we simply stash the controlvm | |
101 | * message, then attempt to process it again the next time | |
102 | * controlvm_periodic_work() runs. | |
103 | */ | |
104 | struct controlvm_message controlvm_pending_msg; | |
105 | bool controlvm_pending_msg_valid; | |
800da5fb | 106 | struct vmcall_io_controlvm_addr_params controlvm_params; |
765b2f82 | 107 | }; |
12e364b9 | 108 | |
765b2f82 | 109 | static struct visorchipset_device *chipset_dev; |
12e364b9 | 110 | |
12e364b9 KC |
111 | struct parahotplug_request { |
112 | struct list_head list; | |
113 | int id; | |
114 | unsigned long expiration; | |
3ab47701 | 115 | struct controlvm_message msg; |
12e364b9 KC |
116 | }; |
117 | ||
19f6634f BR |
118 | /* prototypes for attributes */ |
119 | static ssize_t toolaction_show(struct device *dev, | |
84efd207 DK |
120 | struct device_attribute *attr, |
121 | char *buf) | |
122 | { | |
123 | u8 tool_action = 0; | |
002a5abb DK |
124 | int err; |
125 | ||
126 | err = visorchannel_read(chipset_dev->controlvm_channel, | |
545f0913 | 127 | offsetof(struct visor_controlvm_channel, |
002a5abb DK |
128 | tool_action), |
129 | &tool_action, sizeof(u8)); | |
130 | if (err) | |
131 | return err; | |
84efd207 | 132 | |
746fb137 | 133 | return sprintf(buf, "%u\n", tool_action); |
84efd207 DK |
134 | } |
135 | ||
19f6634f | 136 | static ssize_t toolaction_store(struct device *dev, |
8e76e695 | 137 | struct device_attribute *attr, |
84efd207 DK |
138 | const char *buf, size_t count) |
139 | { | |
140 | u8 tool_action; | |
dc35cdf3 | 141 | int err; |
84efd207 DK |
142 | |
143 | if (kstrtou8(buf, 10, &tool_action)) | |
144 | return -EINVAL; | |
145 | ||
545f0913 SW |
146 | err = visorchannel_write(chipset_dev->controlvm_channel, |
147 | offsetof(struct visor_controlvm_channel, | |
148 | tool_action), | |
149 | &tool_action, sizeof(u8)); | |
dc35cdf3 DK |
150 | if (err) |
151 | return err; | |
84efd207 DK |
152 | return count; |
153 | } | |
19f6634f BR |
154 | static DEVICE_ATTR_RW(toolaction); |
155 | ||
54b31229 | 156 | static ssize_t boottotool_show(struct device *dev, |
1b1d463d DK |
157 | struct device_attribute *attr, |
158 | char *buf) | |
159 | { | |
545f0913 | 160 | struct efi_visor_indication efi_visor_indication; |
0b01c6ce DK |
161 | int err; |
162 | ||
163 | err = visorchannel_read(chipset_dev->controlvm_channel, | |
545f0913 SW |
164 | offsetof(struct visor_controlvm_channel, |
165 | efi_visor_ind), | |
166 | &efi_visor_indication, | |
167 | sizeof(struct efi_visor_indication)); | |
0b01c6ce DK |
168 | if (err) |
169 | return err; | |
545f0913 | 170 | return sprintf(buf, "%u\n", efi_visor_indication.boot_to_tool); |
1b1d463d DK |
171 | } |
172 | ||
54b31229 | 173 | static ssize_t boottotool_store(struct device *dev, |
1b1d463d DK |
174 | struct device_attribute *attr, |
175 | const char *buf, size_t count) | |
176 | { | |
b309266e | 177 | int val, err; |
545f0913 | 178 | struct efi_visor_indication efi_visor_indication; |
1b1d463d DK |
179 | |
180 | if (kstrtoint(buf, 10, &val)) | |
181 | return -EINVAL; | |
182 | ||
545f0913 SW |
183 | efi_visor_indication.boot_to_tool = val; |
184 | err = visorchannel_write(chipset_dev->controlvm_channel, | |
185 | offsetof(struct visor_controlvm_channel, | |
186 | efi_visor_ind), | |
187 | &(efi_visor_indication), | |
188 | sizeof(struct efi_visor_indication)); | |
b309266e DK |
189 | if (err) |
190 | return err; | |
1b1d463d DK |
191 | return count; |
192 | } | |
54b31229 BR |
193 | static DEVICE_ATTR_RW(boottotool); |
194 | ||
422af17c | 195 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
8a4a8a03 DK |
196 | char *buf) |
197 | { | |
198 | u32 error = 0; | |
d9857c79 | 199 | int err; |
8a4a8a03 | 200 | |
d9857c79 | 201 | err = visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 202 | offsetof(struct visor_controlvm_channel, |
d9857c79 DK |
203 | installation_error), |
204 | &error, sizeof(u32)); | |
205 | if (err) | |
206 | return err; | |
6df555c1 | 207 | return sprintf(buf, "%u\n", error); |
8a4a8a03 DK |
208 | } |
209 | ||
422af17c | 210 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
8a4a8a03 DK |
211 | const char *buf, size_t count) |
212 | { | |
213 | u32 error; | |
ea295857 | 214 | int err; |
8a4a8a03 DK |
215 | |
216 | if (kstrtou32(buf, 10, &error)) | |
217 | return -EINVAL; | |
218 | ||
545f0913 SW |
219 | err = visorchannel_write(chipset_dev->controlvm_channel, |
220 | offsetof(struct visor_controlvm_channel, | |
221 | installation_error), | |
222 | &error, sizeof(u32)); | |
ea295857 DK |
223 | if (err) |
224 | return err; | |
8a4a8a03 DK |
225 | return count; |
226 | } | |
422af17c BR |
227 | static DEVICE_ATTR_RW(error); |
228 | ||
229 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, | |
79730c7c DK |
230 | char *buf) |
231 | { | |
232 | u32 text_id = 0; | |
0d406436 DK |
233 | int err; |
234 | ||
545f0913 SW |
235 | err = visorchannel_read(chipset_dev->controlvm_channel, |
236 | offsetof(struct visor_controlvm_channel, | |
237 | installation_text_id), | |
238 | &text_id, sizeof(u32)); | |
0d406436 DK |
239 | if (err) |
240 | return err; | |
79730c7c | 241 | |
6df555c1 | 242 | return sprintf(buf, "%u\n", text_id); |
79730c7c DK |
243 | } |
244 | ||
422af17c | 245 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
79730c7c DK |
246 | const char *buf, size_t count) |
247 | { | |
248 | u32 text_id; | |
08a55d2d | 249 | int err; |
79730c7c DK |
250 | |
251 | if (kstrtou32(buf, 10, &text_id)) | |
252 | return -EINVAL; | |
253 | ||
545f0913 SW |
254 | err = visorchannel_write(chipset_dev->controlvm_channel, |
255 | offsetof(struct visor_controlvm_channel, | |
256 | installation_text_id), | |
257 | &text_id, sizeof(u32)); | |
08a55d2d DK |
258 | if (err) |
259 | return err; | |
79730c7c DK |
260 | return count; |
261 | } | |
422af17c BR |
262 | static DEVICE_ATTR_RW(textid); |
263 | ||
264 | static ssize_t remaining_steps_show(struct device *dev, | |
97f792ee DK |
265 | struct device_attribute *attr, char *buf) |
266 | { | |
267 | u16 remaining_steps = 0; | |
c53578bd DK |
268 | int err; |
269 | ||
270 | err = visorchannel_read(chipset_dev->controlvm_channel, | |
545f0913 | 271 | offsetof(struct visor_controlvm_channel, |
c53578bd DK |
272 | installation_remaining_steps), |
273 | &remaining_steps, sizeof(u16)); | |
274 | if (err) | |
275 | return err; | |
97f792ee | 276 | |
746fb137 | 277 | return sprintf(buf, "%hu\n", remaining_steps); |
97f792ee DK |
278 | } |
279 | ||
422af17c | 280 | static ssize_t remaining_steps_store(struct device *dev, |
8e76e695 | 281 | struct device_attribute *attr, |
97f792ee DK |
282 | const char *buf, size_t count) |
283 | { | |
284 | u16 remaining_steps; | |
e030d39d | 285 | int err; |
97f792ee DK |
286 | |
287 | if (kstrtou16(buf, 10, &remaining_steps)) | |
288 | return -EINVAL; | |
289 | ||
545f0913 SW |
290 | err = visorchannel_write(chipset_dev->controlvm_channel, |
291 | offsetof(struct visor_controlvm_channel, | |
292 | installation_remaining_steps), | |
293 | &remaining_steps, sizeof(u16)); | |
e030d39d DK |
294 | if (err) |
295 | return err; | |
97f792ee DK |
296 | return count; |
297 | } | |
422af17c BR |
298 | static DEVICE_ATTR_RW(remaining_steps); |
299 | ||
b32c5cb8 | 300 | static const guid_t *parser_id_get(struct parser_context *ctx) |
46168810 | 301 | { |
545f0913 | 302 | struct visor_controlvm_parameters_header *phdr = NULL; |
46168810 | 303 | |
545f0913 | 304 | phdr = (struct visor_controlvm_parameters_header *)(ctx->data); |
b32c5cb8 | 305 | return &phdr->id; |
46168810 EA |
306 | } |
307 | ||
464129ed | 308 | static void parser_done(struct parser_context *ctx) |
46168810 | 309 | { |
765b2f82 | 310 | chipset_dev->controlvm_payload_bytes_buffered -= ctx->param_bytes; |
46168810 EA |
311 | kfree(ctx); |
312 | } | |
313 | ||
e80ffd4b | 314 | static void *parser_string_get(struct parser_context *ctx) |
46168810 EA |
315 | { |
316 | u8 *pscan; | |
317 | unsigned long nscan; | |
318 | int value_length = -1; | |
319 | void *value = NULL; | |
320 | int i; | |
321 | ||
46168810 | 322 | pscan = ctx->curr; |
904ee62a DB |
323 | if (!pscan) |
324 | return NULL; | |
46168810 EA |
325 | nscan = ctx->bytes_remaining; |
326 | if (nscan == 0) | |
327 | return NULL; | |
904ee62a | 328 | |
46168810 EA |
329 | for (i = 0, value_length = -1; i < nscan; i++) |
330 | if (pscan[i] == '\0') { | |
331 | value_length = i; | |
332 | break; | |
333 | } | |
ac0aba67 SW |
334 | /* '\0' was not included in the length */ |
335 | if (value_length < 0) | |
46168810 | 336 | value_length = nscan; |
904ee62a | 337 | |
8c8c975f | 338 | value = kmalloc(value_length + 1, GFP_KERNEL); |
e4a3dd33 | 339 | if (!value) |
46168810 EA |
340 | return NULL; |
341 | if (value_length > 0) | |
342 | memcpy(value, pscan, value_length); | |
0e7bf2f4 | 343 | ((u8 *)(value))[value_length] = '\0'; |
46168810 EA |
344 | return value; |
345 | } | |
346 | ||
e80ffd4b | 347 | static void *parser_name_get(struct parser_context *ctx) |
046f93dc | 348 | { |
545f0913 | 349 | struct visor_controlvm_parameters_header *phdr = NULL; |
046f93dc | 350 | |
545f0913 | 351 | phdr = (struct visor_controlvm_parameters_header *)(ctx->data); |
308ee8aa DB |
352 | |
353 | if (phdr->name_offset + phdr->name_length > ctx->param_bytes) | |
354 | return NULL; | |
355 | ||
046f93dc DK |
356 | ctx->curr = ctx->data + phdr->name_offset; |
357 | ctx->bytes_remaining = phdr->name_length; | |
358 | return parser_string_get(ctx); | |
359 | } | |
360 | ||
ab0592b9 DZ |
361 | struct visor_busdev { |
362 | u32 bus_no; | |
363 | u32 dev_no; | |
364 | }; | |
365 | ||
366 | static int match_visorbus_dev_by_id(struct device *dev, void *data) | |
367 | { | |
368 | struct visor_device *vdev = to_visor_device(dev); | |
7f44582e | 369 | struct visor_busdev *id = data; |
ab0592b9 | 370 | |
727bb648 DK |
371 | if ((vdev->chipset_bus_no == id->bus_no) && |
372 | (vdev->chipset_dev_no == id->dev_no)) | |
ab0592b9 DZ |
373 | return 1; |
374 | ||
375 | return 0; | |
376 | } | |
d1e08637 | 377 | |
ab0592b9 DZ |
378 | struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no, |
379 | struct visor_device *from) | |
380 | { | |
381 | struct device *dev; | |
382 | struct device *dev_start = NULL; | |
383 | struct visor_device *vdev = NULL; | |
384 | struct visor_busdev id = { | |
35709e0f SW |
385 | .bus_no = bus_no, |
386 | .dev_no = dev_no | |
387 | }; | |
ab0592b9 DZ |
388 | |
389 | if (from) | |
390 | dev_start = &from->device; | |
391 | dev = bus_find_device(&visorbus_type, dev_start, (void *)&id, | |
392 | match_visorbus_dev_by_id); | |
393 | if (dev) | |
394 | vdev = to_visor_device(dev); | |
395 | return vdev; | |
396 | } | |
ab0592b9 | 397 | |
e80ffd4b CD |
398 | static void controlvm_init_response(struct controlvm_message *msg, |
399 | struct controlvm_message_header *msg_hdr, | |
400 | int response) | |
5f251395 DK |
401 | { |
402 | memset(msg, 0, sizeof(struct controlvm_message)); | |
403 | memcpy(&msg->hdr, msg_hdr, sizeof(struct controlvm_message_header)); | |
404 | msg->hdr.payload_bytes = 0; | |
405 | msg->hdr.payload_vm_offset = 0; | |
406 | msg->hdr.payload_max_bytes = 0; | |
407 | if (response < 0) { | |
408 | msg->hdr.flags.failed = 1; | |
409 | msg->hdr.completion_status = (u32)(-response); | |
410 | } | |
411 | } | |
412 | ||
e80ffd4b CD |
413 | static int controlvm_respond_chipset_init( |
414 | struct controlvm_message_header *msg_hdr, | |
415 | int response, | |
416 | enum visor_chipset_feature features) | |
5f251395 DK |
417 | { |
418 | struct controlvm_message outmsg; | |
419 | ||
420 | controlvm_init_response(&outmsg, msg_hdr, response); | |
421 | outmsg.cmd.init_chipset.features = features; | |
765b2f82 | 422 | return visorchannel_signalinsert(chipset_dev->controlvm_channel, |
1d7f5522 | 423 | CONTROLVM_QUEUE_REQUEST, &outmsg); |
5f251395 DK |
424 | } |
425 | ||
e80ffd4b | 426 | static int chipset_init(struct controlvm_message *inmsg) |
12e364b9 KC |
427 | { |
428 | static int chipset_inited; | |
d3ad6e69 | 429 | enum visor_chipset_feature features = 0; |
12e364b9 | 430 | int rc = CONTROLVM_RESP_SUCCESS; |
79c3f971 | 431 | int res = 0; |
12e364b9 | 432 | |
12e364b9 | 433 | if (chipset_inited) { |
98f9ed9e | 434 | rc = -CONTROLVM_RESP_ALREADY_DONE; |
79c3f971 | 435 | res = -EIO; |
5233d1eb | 436 | goto out_respond; |
12e364b9 KC |
437 | } |
438 | chipset_inited = 1; | |
12e364b9 | 439 | |
ec17f452 DB |
440 | /* |
441 | * Set features to indicate we support parahotplug (if Command | |
2ee0d052 EA |
442 | * also supports it). |
443 | */ | |
0762188b | 444 | features = inmsg->cmd.init_chipset.features & |
d3ad6e69 | 445 | VISOR_CHIPSET_FEATURE_PARA_HOTPLUG; |
12e364b9 | 446 | |
ec17f452 DB |
447 | /* |
448 | * Set the "reply" bit so Command knows this is a | |
2ee0d052 EA |
449 | * features-aware driver. |
450 | */ | |
d3ad6e69 | 451 | features |= VISOR_CHIPSET_FEATURE_REPLY; |
12e364b9 | 452 | |
5233d1eb | 453 | out_respond: |
98d7b594 | 454 | if (inmsg->hdr.flags.response_expected) |
79c3f971 DK |
455 | res = controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
456 | ||
457 | return res; | |
12e364b9 KC |
458 | } |
459 | ||
e80ffd4b CD |
460 | static int controlvm_respond(struct controlvm_message_header *msg_hdr, |
461 | int response, | |
462 | struct visor_segment_state *state) | |
12e364b9 | 463 | { |
3ab47701 | 464 | struct controlvm_message outmsg; |
26eb2c0c | 465 | |
b3168c70 | 466 | controlvm_init_response(&outmsg, msg_hdr, response); |
2098dbd1 | 467 | if (outmsg.hdr.flags.test_message == 1) |
2d26aeb7 | 468 | return -EINVAL; |
2098dbd1 | 469 | |
4c0e65f8 DK |
470 | if (state) { |
471 | outmsg.cmd.device_change_state.state = *state; | |
472 | outmsg.cmd.device_change_state.flags.phys_device = 1; | |
473 | } | |
26eb2c0c | 474 | |
765b2f82 | 475 | return visorchannel_signalinsert(chipset_dev->controlvm_channel, |
2c4ef563 | 476 | CONTROLVM_QUEUE_REQUEST, &outmsg); |
12e364b9 KC |
477 | } |
478 | ||
2ee0deec PB |
479 | enum crash_obj_type { |
480 | CRASH_DEV, | |
481 | CRASH_BUS, | |
482 | }; | |
483 | ||
e80ffd4b CD |
484 | static int save_crash_message(struct controlvm_message *msg, |
485 | enum crash_obj_type cr_type) | |
12c957dc TS |
486 | { |
487 | u32 local_crash_msg_offset; | |
488 | u16 local_crash_msg_count; | |
8dff01f7 | 489 | int err; |
12c957dc | 490 | |
765b2f82 | 491 | err = visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 492 | offsetof(struct visor_controlvm_channel, |
8dff01f7 DK |
493 | saved_crash_message_count), |
494 | &local_crash_msg_count, sizeof(u16)); | |
495 | if (err) { | |
35301b87 DK |
496 | dev_err(&chipset_dev->acpi_device->dev, |
497 | "failed to read message count\n"); | |
8dff01f7 | 498 | return err; |
12c957dc TS |
499 | } |
500 | ||
501 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { | |
35301b87 DK |
502 | dev_err(&chipset_dev->acpi_device->dev, |
503 | "invalid number of messages\n"); | |
8dff01f7 | 504 | return -EIO; |
12c957dc TS |
505 | } |
506 | ||
765b2f82 | 507 | err = visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 508 | offsetof(struct visor_controlvm_channel, |
8dff01f7 DK |
509 | saved_crash_message_offset), |
510 | &local_crash_msg_offset, sizeof(u32)); | |
511 | if (err) { | |
35301b87 DK |
512 | dev_err(&chipset_dev->acpi_device->dev, |
513 | "failed to read offset\n"); | |
8dff01f7 | 514 | return err; |
12c957dc TS |
515 | } |
516 | ||
603a1989 | 517 | switch (cr_type) { |
36309d3b DB |
518 | case CRASH_DEV: |
519 | local_crash_msg_offset += sizeof(struct controlvm_message); | |
765b2f82 | 520 | err = visorchannel_write(chipset_dev->controlvm_channel, |
8dff01f7 DK |
521 | local_crash_msg_offset, |
522 | msg, | |
36309d3b | 523 | sizeof(struct controlvm_message)); |
8dff01f7 | 524 | if (err) { |
35301b87 DK |
525 | dev_err(&chipset_dev->acpi_device->dev, |
526 | "failed to write dev msg\n"); | |
8dff01f7 | 527 | return err; |
12c957dc | 528 | } |
36309d3b DB |
529 | break; |
530 | case CRASH_BUS: | |
765b2f82 | 531 | err = visorchannel_write(chipset_dev->controlvm_channel, |
8dff01f7 DK |
532 | local_crash_msg_offset, |
533 | msg, | |
534 | sizeof(struct controlvm_message)); | |
535 | if (err) { | |
35301b87 DK |
536 | dev_err(&chipset_dev->acpi_device->dev, |
537 | "failed to write bus msg\n"); | |
8dff01f7 | 538 | return err; |
12c957dc | 539 | } |
36309d3b DB |
540 | break; |
541 | default: | |
35301b87 DK |
542 | dev_err(&chipset_dev->acpi_device->dev, |
543 | "Invalid crash_obj_type\n"); | |
36309d3b | 544 | break; |
12c957dc | 545 | } |
8dff01f7 | 546 | return 0; |
12c957dc TS |
547 | } |
548 | ||
e80ffd4b CD |
549 | static int controlvm_responder(enum controlvm_id cmd_id, |
550 | struct controlvm_message_header *pending_msg_hdr, | |
551 | int response) | |
12e364b9 | 552 | { |
e4a3dd33 | 553 | if (!pending_msg_hdr) |
734ad93a | 554 | return -EIO; |
12e364b9 | 555 | |
0274b5ae | 556 | if (pending_msg_hdr->id != (u32)cmd_id) |
734ad93a | 557 | return -EINVAL; |
0aca7844 | 558 | |
4c0e65f8 | 559 | return controlvm_respond(pending_msg_hdr, response, NULL); |
12e364b9 KC |
560 | } |
561 | ||
e80ffd4b CD |
562 | static int device_changestate_responder( |
563 | enum controlvm_id cmd_id, | |
564 | struct visor_device *p, int response, | |
565 | struct visor_segment_state response_state) | |
12e364b9 | 566 | { |
3ab47701 | 567 | struct controlvm_message outmsg; |
12e364b9 | 568 | |
e4a3dd33 | 569 | if (!p->pending_msg_hdr) |
68f99d49 | 570 | return -EIO; |
0274b5ae | 571 | if (p->pending_msg_hdr->id != cmd_id) |
68f99d49 | 572 | return -EINVAL; |
12e364b9 | 573 | |
0274b5ae | 574 | controlvm_init_response(&outmsg, p->pending_msg_hdr, response); |
12e364b9 | 575 | |
b253ff5b DK |
576 | outmsg.cmd.device_change_state.bus_no = p->chipset_bus_no; |
577 | outmsg.cmd.device_change_state.dev_no = p->chipset_dev_no; | |
fbb31f48 | 578 | outmsg.cmd.device_change_state.state = response_state; |
12e364b9 | 579 | |
765b2f82 | 580 | return visorchannel_signalinsert(chipset_dev->controlvm_channel, |
68f99d49 | 581 | CONTROLVM_QUEUE_REQUEST, &outmsg); |
12e364b9 KC |
582 | } |
583 | ||
e80ffd4b | 584 | static int visorbus_create(struct controlvm_message *inmsg) |
12e364b9 | 585 | { |
2ea5117b | 586 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
8f334e30 | 587 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca | 588 | u32 bus_no = cmd->create_bus.bus_no; |
d32517e3 | 589 | struct visor_device *bus_info; |
b32c4997 | 590 | struct visorchannel *visorchannel; |
33161a29 | 591 | int err; |
12e364b9 | 592 | |
d32517e3 | 593 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
6c5fed35 | 594 | if (bus_info && (bus_info->state.created == 1)) { |
055bc909 | 595 | dev_err(&chipset_dev->acpi_device->dev, |
87408fe0 | 596 | "failed %s: already exists\n", __func__); |
33161a29 DK |
597 | err = -EEXIST; |
598 | goto err_respond; | |
12e364b9 | 599 | } |
33161a29 | 600 | |
6c5fed35 BR |
601 | bus_info = kzalloc(sizeof(*bus_info), GFP_KERNEL); |
602 | if (!bus_info) { | |
33161a29 DK |
603 | err = -ENOMEM; |
604 | goto err_respond; | |
12e364b9 KC |
605 | } |
606 | ||
4abce83d | 607 | INIT_LIST_HEAD(&bus_info->list_all); |
d32517e3 DZ |
608 | bus_info->chipset_bus_no = bus_no; |
609 | bus_info->chipset_dev_no = BUS_ROOT_DEVICE; | |
12e364b9 | 610 | |
b32c5cb8 | 611 | if (guid_equal(&cmd->create_bus.bus_inst_guid, &visor_siovm_guid)) { |
300ed612 DK |
612 | err = save_crash_message(inmsg, CRASH_BUS); |
613 | if (err) | |
614 | goto err_free_bus_info; | |
615 | } | |
12e364b9 | 616 | |
8f334e30 DK |
617 | if (inmsg->hdr.flags.response_expected == 1) { |
618 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), | |
619 | GFP_KERNEL); | |
620 | if (!pmsg_hdr) { | |
33161a29 DK |
621 | err = -ENOMEM; |
622 | goto err_free_bus_info; | |
8f334e30 DK |
623 | } |
624 | ||
625 | memcpy(pmsg_hdr, &inmsg->hdr, | |
626 | sizeof(struct controlvm_message_header)); | |
627 | bus_info->pending_msg_hdr = pmsg_hdr; | |
628 | } | |
629 | ||
33161a29 DK |
630 | visorchannel = visorchannel_create(cmd->create_bus.channel_addr, |
631 | cmd->create_bus.channel_bytes, | |
632 | GFP_KERNEL, | |
b32c5cb8 | 633 | &cmd->create_bus.bus_data_type_guid); |
33161a29 | 634 | if (!visorchannel) { |
33161a29 DK |
635 | err = -ENOMEM; |
636 | goto err_free_pending_msg; | |
637 | } | |
904ee62a | 638 | |
33161a29 DK |
639 | bus_info->visorchannel = visorchannel; |
640 | ||
fdf5b9ac DK |
641 | /* Response will be handled by visorbus_create_instance on success */ |
642 | err = visorbus_create_instance(bus_info); | |
621f5e18 DK |
643 | if (err) |
644 | goto err_destroy_channel; | |
8f334e30 | 645 | |
33161a29 DK |
646 | return 0; |
647 | ||
621f5e18 DK |
648 | err_destroy_channel: |
649 | visorchannel_destroy(visorchannel); | |
650 | ||
33161a29 DK |
651 | err_free_pending_msg: |
652 | kfree(bus_info->pending_msg_hdr); | |
8f334e30 | 653 | |
33161a29 | 654 | err_free_bus_info: |
8f334e30 | 655 | kfree(bus_info); |
12e364b9 | 656 | |
33161a29 | 657 | err_respond: |
8f334e30 | 658 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 659 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
33161a29 | 660 | return err; |
12e364b9 KC |
661 | } |
662 | ||
e80ffd4b | 663 | static int visorbus_destroy(struct controlvm_message *inmsg) |
12e364b9 | 664 | { |
2ea5117b | 665 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
3e0e8db9 | 666 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca | 667 | u32 bus_no = cmd->destroy_bus.bus_no; |
d32517e3 | 668 | struct visor_device *bus_info; |
30f6c3f5 | 669 | int err; |
12e364b9 | 670 | |
d32517e3 | 671 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
3e0e8db9 | 672 | if (!bus_info) { |
30f6c3f5 DK |
673 | err = -ENODEV; |
674 | goto err_respond; | |
3e0e8db9 DK |
675 | } |
676 | if (bus_info->state.created == 0) { | |
30f6c3f5 DK |
677 | err = -ENOENT; |
678 | goto err_respond; | |
3e0e8db9 DK |
679 | } |
680 | if (bus_info->pending_msg_hdr) { | |
681 | /* only non-NULL if dev is still waiting on a response */ | |
30f6c3f5 DK |
682 | err = -EEXIST; |
683 | goto err_respond; | |
3e0e8db9 DK |
684 | } |
685 | if (inmsg->hdr.flags.response_expected == 1) { | |
686 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); | |
687 | if (!pmsg_hdr) { | |
30f6c3f5 DK |
688 | err = -ENOMEM; |
689 | goto err_respond; | |
3e0e8db9 DK |
690 | } |
691 | ||
692 | memcpy(pmsg_hdr, &inmsg->hdr, | |
693 | sizeof(struct controlvm_message_header)); | |
694 | bus_info->pending_msg_hdr = pmsg_hdr; | |
695 | } | |
12e364b9 | 696 | |
a7093ba1 SW |
697 | /* Response will be handled by visorbus_remove_instance */ |
698 | visorbus_remove_instance(bus_info); | |
30f6c3f5 | 699 | return 0; |
3e0e8db9 | 700 | |
30f6c3f5 | 701 | err_respond: |
3e0e8db9 | 702 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 703 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
30f6c3f5 | 704 | return err; |
12e364b9 KC |
705 | } |
706 | ||
e80ffd4b CD |
707 | static int visorbus_configure(struct controlvm_message *inmsg, |
708 | struct parser_context *parser_ctx) | |
12e364b9 | 709 | { |
2ea5117b | 710 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
e82ba62e | 711 | u32 bus_no; |
d32517e3 | 712 | struct visor_device *bus_info; |
c71529fe | 713 | int err = 0; |
12e364b9 | 714 | |
654bada0 | 715 | bus_no = cmd->configure_bus.bus_no; |
d32517e3 | 716 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
654bada0 | 717 | if (!bus_info) { |
c71529fe DK |
718 | err = -EINVAL; |
719 | goto err_respond; | |
654bada0 | 720 | } else if (bus_info->state.created == 0) { |
c71529fe DK |
721 | err = -EINVAL; |
722 | goto err_respond; | |
e4a3dd33 | 723 | } else if (bus_info->pending_msg_hdr) { |
c71529fe DK |
724 | err = -EIO; |
725 | goto err_respond; | |
12e364b9 | 726 | } |
c71529fe DK |
727 | |
728 | err = visorchannel_set_clientpartition | |
729 | (bus_info->visorchannel, | |
730 | cmd->configure_bus.guest_handle); | |
731 | if (err) | |
732 | goto err_respond; | |
733 | ||
046f93dc | 734 | if (parser_ctx) { |
b32c5cb8 AS |
735 | const guid_t *partition_guid = parser_id_get(parser_ctx); |
736 | ||
737 | guid_copy(&bus_info->partition_guid, partition_guid); | |
046f93dc DK |
738 | bus_info->name = parser_name_get(parser_ctx); |
739 | } | |
c71529fe | 740 | |
c71529fe | 741 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 742 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
c71529fe DK |
743 | return 0; |
744 | ||
745 | err_respond: | |
71a0265d | 746 | dev_err(&chipset_dev->acpi_device->dev, |
9a8dc900 | 747 | "%s exited with err: %d\n", __func__, err); |
b6b057d8 | 748 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 749 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
c71529fe | 750 | return err; |
12e364b9 KC |
751 | } |
752 | ||
e80ffd4b | 753 | static int visorbus_device_create(struct controlvm_message *inmsg) |
12e364b9 | 754 | { |
2ea5117b | 755 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
5a80e98a | 756 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca JS |
757 | u32 bus_no = cmd->create_device.bus_no; |
758 | u32 dev_no = cmd->create_device.dev_no; | |
a298bc0b | 759 | struct visor_device *dev_info = NULL; |
d32517e3 | 760 | struct visor_device *bus_info; |
b32c4997 | 761 | struct visorchannel *visorchannel; |
ad2a7d65 | 762 | int err; |
12e364b9 | 763 | |
a298bc0b DZ |
764 | bus_info = visorbus_get_device_by_id(bus_no, BUS_ROOT_DEVICE, NULL); |
765 | if (!bus_info) { | |
a8c26e4b DK |
766 | dev_err(&chipset_dev->acpi_device->dev, |
767 | "failed to get bus by id: %d\n", bus_no); | |
ad2a7d65 DK |
768 | err = -ENODEV; |
769 | goto err_respond; | |
12e364b9 | 770 | } |
a298bc0b | 771 | if (bus_info->state.created == 0) { |
a8c26e4b DK |
772 | dev_err(&chipset_dev->acpi_device->dev, |
773 | "bus not created, id: %d\n", bus_no); | |
ad2a7d65 DK |
774 | err = -EINVAL; |
775 | goto err_respond; | |
12e364b9 | 776 | } |
a298bc0b DZ |
777 | |
778 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); | |
779 | if (dev_info && (dev_info->state.created == 1)) { | |
a8c26e4b DK |
780 | dev_err(&chipset_dev->acpi_device->dev, |
781 | "failed to get bus by id: %d/%d\n", bus_no, dev_no); | |
ad2a7d65 DK |
782 | err = -EEXIST; |
783 | goto err_respond; | |
12e364b9 | 784 | } |
a298bc0b | 785 | |
c60c8e26 BR |
786 | dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL); |
787 | if (!dev_info) { | |
ad2a7d65 DK |
788 | err = -ENOMEM; |
789 | goto err_respond; | |
12e364b9 | 790 | } |
97a84f12 | 791 | |
a298bc0b DZ |
792 | dev_info->chipset_bus_no = bus_no; |
793 | dev_info->chipset_dev_no = dev_no; | |
b32c5cb8 | 794 | guid_copy(&dev_info->inst, &cmd->create_device.dev_inst_guid); |
a298bc0b DZ |
795 | |
796 | /* not sure where the best place to set the 'parent' */ | |
797 | dev_info->device.parent = &bus_info->device; | |
798 | ||
a3ef1a8e DK |
799 | visorchannel = |
800 | visorchannel_create_with_lock(cmd->create_device.channel_addr, | |
801 | cmd->create_device.channel_bytes, | |
802 | GFP_KERNEL, | |
b32c5cb8 | 803 | &cmd->create_device.data_type_guid); |
b32c4997 | 804 | if (!visorchannel) { |
a8c26e4b DK |
805 | dev_err(&chipset_dev->acpi_device->dev, |
806 | "failed to create visorchannel: %d/%d\n", | |
807 | bus_no, dev_no); | |
ad2a7d65 DK |
808 | err = -ENOMEM; |
809 | goto err_free_dev_info; | |
b32c4997 DZ |
810 | } |
811 | dev_info->visorchannel = visorchannel; | |
b32c5cb8 AS |
812 | guid_copy(&dev_info->channel_type_guid, &cmd->create_device.data_type_guid); |
813 | if (guid_equal(&cmd->create_device.data_type_guid, &visor_vhba_channel_guid)) { | |
ad2a7d65 DK |
814 | err = save_crash_message(inmsg, CRASH_DEV); |
815 | if (err) | |
3f49a21d | 816 | goto err_destroy_visorchannel; |
ad2a7d65 | 817 | } |
12c957dc | 818 | |
5a80e98a DK |
819 | if (inmsg->hdr.flags.response_expected == 1) { |
820 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); | |
821 | if (!pmsg_hdr) { | |
ad2a7d65 | 822 | err = -ENOMEM; |
3f49a21d | 823 | goto err_destroy_visorchannel; |
5a80e98a DK |
824 | } |
825 | ||
826 | memcpy(pmsg_hdr, &inmsg->hdr, | |
827 | sizeof(struct controlvm_message_header)); | |
828 | dev_info->pending_msg_hdr = pmsg_hdr; | |
829 | } | |
51c0f81c SW |
830 | /* create_visor_device will send response */ |
831 | err = create_visor_device(dev_info); | |
3f49a21d DK |
832 | if (err) |
833 | goto err_destroy_visorchannel; | |
834 | ||
ad2a7d65 | 835 | return 0; |
5a80e98a | 836 | |
3f49a21d DK |
837 | err_destroy_visorchannel: |
838 | visorchannel_destroy(visorchannel); | |
839 | ||
ad2a7d65 | 840 | err_free_dev_info: |
5a80e98a DK |
841 | kfree(dev_info); |
842 | ||
ad2a7d65 | 843 | err_respond: |
5a80e98a | 844 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 845 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
ad2a7d65 | 846 | return err; |
12e364b9 KC |
847 | } |
848 | ||
e80ffd4b | 849 | static int visorbus_device_changestate(struct controlvm_message *inmsg) |
12e364b9 | 850 | { |
2ea5117b | 851 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
8e609b5b | 852 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca JS |
853 | u32 bus_no = cmd->device_change_state.bus_no; |
854 | u32 dev_no = cmd->device_change_state.dev_no; | |
545f0913 | 855 | struct visor_segment_state state = cmd->device_change_state.state; |
a298bc0b | 856 | struct visor_device *dev_info; |
b4a8e6ae | 857 | int err = 0; |
12e364b9 | 858 | |
a298bc0b | 859 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
0278a905 | 860 | if (!dev_info) { |
40fc79f9 | 861 | err = -ENODEV; |
0825f191 DK |
862 | goto err_respond; |
863 | } | |
864 | if (dev_info->state.created == 0) { | |
40fc79f9 | 865 | err = -EINVAL; |
0825f191 | 866 | goto err_respond; |
12e364b9 | 867 | } |
8e609b5b DK |
868 | if (dev_info->pending_msg_hdr) { |
869 | /* only non-NULL if dev is still waiting on a response */ | |
40fc79f9 | 870 | err = -EIO; |
8e609b5b DK |
871 | goto err_respond; |
872 | } | |
873 | if (inmsg->hdr.flags.response_expected == 1) { | |
874 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); | |
875 | if (!pmsg_hdr) { | |
40fc79f9 | 876 | err = -ENOMEM; |
8e609b5b DK |
877 | goto err_respond; |
878 | } | |
879 | ||
880 | memcpy(pmsg_hdr, &inmsg->hdr, | |
881 | sizeof(struct controlvm_message_header)); | |
882 | dev_info->pending_msg_hdr = pmsg_hdr; | |
883 | } | |
884 | ||
885 | if (state.alive == segment_state_running.alive && | |
886 | state.operating == segment_state_running.operating) | |
c0b44136 SW |
887 | /* Response will be sent from visorchipset_device_resume */ |
888 | err = visorchipset_device_resume(dev_info); | |
8e609b5b DK |
889 | /* ServerNotReady / ServerLost / SegmentStateStandby */ |
890 | else if (state.alive == segment_state_standby.alive && | |
891 | state.operating == segment_state_standby.operating) | |
892 | /* | |
893 | * technically this is standby case where server is lost. | |
c0b44136 | 894 | * Response will be sent from visorchipset_device_pause. |
8e609b5b | 895 | */ |
c0b44136 | 896 | err = visorchipset_device_pause(dev_info); |
b4a8e6ae DK |
897 | if (err) |
898 | goto err_respond; | |
899 | ||
40fc79f9 | 900 | return 0; |
0825f191 DK |
901 | |
902 | err_respond: | |
03662df8 | 903 | dev_err(&chipset_dev->acpi_device->dev, "failed: %d\n", err); |
8e609b5b | 904 | if (inmsg->hdr.flags.response_expected == 1) |
4fb2539c | 905 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
40fc79f9 | 906 | return err; |
12e364b9 KC |
907 | } |
908 | ||
e80ffd4b | 909 | static int visorbus_device_destroy(struct controlvm_message *inmsg) |
12e364b9 | 910 | { |
2ea5117b | 911 | struct controlvm_message_packet *cmd = &inmsg->cmd; |
9e9eec6b | 912 | struct controlvm_message_header *pmsg_hdr = NULL; |
52063eca JS |
913 | u32 bus_no = cmd->destroy_device.bus_no; |
914 | u32 dev_no = cmd->destroy_device.dev_no; | |
a298bc0b | 915 | struct visor_device *dev_info; |
e7954918 | 916 | int err; |
12e364b9 | 917 | |
a298bc0b | 918 | dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL); |
9e9eec6b | 919 | if (!dev_info) { |
e7954918 | 920 | err = -ENODEV; |
9e9eec6b DK |
921 | goto err_respond; |
922 | } | |
923 | if (dev_info->state.created == 0) { | |
e7954918 | 924 | err = -EINVAL; |
9e9eec6b DK |
925 | goto err_respond; |
926 | } | |
9e9eec6b DK |
927 | if (dev_info->pending_msg_hdr) { |
928 | /* only non-NULL if dev is still waiting on a response */ | |
e7954918 | 929 | err = -EIO; |
9e9eec6b DK |
930 | goto err_respond; |
931 | } | |
932 | if (inmsg->hdr.flags.response_expected == 1) { | |
933 | pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL); | |
934 | if (!pmsg_hdr) { | |
e7954918 | 935 | err = -ENOMEM; |
9e9eec6b DK |
936 | goto err_respond; |
937 | } | |
938 | ||
939 | memcpy(pmsg_hdr, &inmsg->hdr, | |
940 | sizeof(struct controlvm_message_header)); | |
941 | dev_info->pending_msg_hdr = pmsg_hdr; | |
942 | } | |
943 | ||
661a215b | 944 | kfree(dev_info->name); |
b74856b4 | 945 | remove_visor_device(dev_info); |
e7954918 | 946 | return 0; |
9e9eec6b DK |
947 | |
948 | err_respond: | |
949 | if (inmsg->hdr.flags.response_expected == 1) | |
4fb2539c | 950 | controlvm_responder(inmsg->hdr.id, &inmsg->hdr, err); |
e7954918 | 951 | return err; |
12e364b9 KC |
952 | } |
953 | ||
12e364b9 | 954 | /* |
5d501ef4 DB |
955 | * The general parahotplug flow works as follows. The visorchipset receives |
956 | * a DEVICE_CHANGESTATE message from Command specifying a physical device | |
957 | * to enable or disable. The CONTROLVM message handler calls | |
958 | * parahotplug_process_message, which then adds the message to a global list | |
959 | * and kicks off a udev event which causes a user level script to enable or | |
960 | * disable the specified device. The udev script then writes to | |
961 | * /sys/devices/platform/visorchipset/parahotplug, which causes the | |
962 | * parahotplug store functions to get called, at which point the | |
904ee62a | 963 | * appropriate CONTROLVM message is retrieved from the list and responded to. |
12e364b9 KC |
964 | */ |
965 | ||
966 | #define PARAHOTPLUG_TIMEOUT_MS 2000 | |
967 | ||
04dbfea6 | 968 | /* |
5d501ef4 DB |
969 | * parahotplug_next_id() - generate unique int to match an outstanding |
970 | * CONTROLVM message with a udev script /sys | |
971 | * response | |
ec17f452 DB |
972 | * |
973 | * Return: a unique integer value | |
12e364b9 | 974 | */ |
e80ffd4b | 975 | static int parahotplug_next_id(void) |
12e364b9 KC |
976 | { |
977 | static atomic_t id = ATOMIC_INIT(0); | |
26eb2c0c | 978 | |
12e364b9 KC |
979 | return atomic_inc_return(&id); |
980 | } | |
981 | ||
04dbfea6 | 982 | /* |
ec17f452 DB |
983 | * parahotplug_next_expiration() - returns the time (in jiffies) when a |
984 | * CONTROLVM message on the list should expire | |
985 | * -- PARAHOTPLUG_TIMEOUT_MS in the future | |
986 | * | |
987 | * Return: expected expiration time (in jiffies) | |
12e364b9 | 988 | */ |
e80ffd4b | 989 | static unsigned long parahotplug_next_expiration(void) |
12e364b9 | 990 | { |
2cc1a1b3 | 991 | return jiffies + msecs_to_jiffies(PARAHOTPLUG_TIMEOUT_MS); |
12e364b9 KC |
992 | } |
993 | ||
04dbfea6 | 994 | /* |
ec17f452 DB |
995 | * parahotplug_request_create() - create a parahotplug_request, which is |
996 | * basically a wrapper for a CONTROLVM_MESSAGE | |
997 | * that we can stick on a list | |
998 | * @msg: the message to insert in the request | |
999 | * | |
1000 | * Return: the request containing the provided message | |
12e364b9 | 1001 | */ |
e80ffd4b CD |
1002 | static struct parahotplug_request *parahotplug_request_create( |
1003 | struct controlvm_message *msg) | |
12e364b9 | 1004 | { |
ea0dcfcf QL |
1005 | struct parahotplug_request *req; |
1006 | ||
8c8c975f | 1007 | req = kmalloc(sizeof(*req), GFP_KERNEL); |
38f736e9 | 1008 | if (!req) |
12e364b9 KC |
1009 | return NULL; |
1010 | ||
1011 | req->id = parahotplug_next_id(); | |
1012 | req->expiration = parahotplug_next_expiration(); | |
1013 | req->msg = *msg; | |
1014 | ||
1015 | return req; | |
1016 | } | |
1017 | ||
04dbfea6 | 1018 | /* |
ec17f452 DB |
1019 | * parahotplug_request_destroy() - free a parahotplug_request |
1020 | * @req: the request to deallocate | |
12e364b9 | 1021 | */ |
e80ffd4b | 1022 | static void parahotplug_request_destroy(struct parahotplug_request *req) |
12e364b9 KC |
1023 | { |
1024 | kfree(req); | |
1025 | } | |
1026 | ||
51319662 | 1027 | static LIST_HEAD(parahotplug_request_list); |
ac0aba67 SW |
1028 | /* lock for above */ |
1029 | static DEFINE_SPINLOCK(parahotplug_request_list_lock); | |
51319662 | 1030 | |
04dbfea6 | 1031 | /* |
ec17f452 DB |
1032 | * parahotplug_request_complete() - mark request as complete |
1033 | * @id: the id of the request | |
1034 | * @active: indicates whether the request is assigned to active partition | |
1035 | * | |
5d501ef4 | 1036 | * Called from the /sys handler, which means the user script has |
ec17f452 | 1037 | * finished the enable/disable. Find the matching identifier, and |
12e364b9 | 1038 | * respond to the CONTROLVM message with success. |
ec17f452 DB |
1039 | * |
1040 | * Return: 0 on success or -EINVAL on failure | |
12e364b9 | 1041 | */ |
e80ffd4b | 1042 | static int parahotplug_request_complete(int id, u16 active) |
12e364b9 | 1043 | { |
e82ba62e JS |
1044 | struct list_head *pos; |
1045 | struct list_head *tmp; | |
12e364b9 | 1046 | |
ddf5de53 | 1047 | spin_lock(¶hotplug_request_list_lock); |
12e364b9 KC |
1048 | |
1049 | /* Look for a request matching "id". */ | |
ddf5de53 | 1050 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { |
12e364b9 KC |
1051 | struct parahotplug_request *req = |
1052 | list_entry(pos, struct parahotplug_request, list); | |
1053 | if (req->id == id) { | |
ec17f452 DB |
1054 | /* |
1055 | * Found a match. Remove it from the list and | |
12e364b9 KC |
1056 | * respond. |
1057 | */ | |
1058 | list_del(pos); | |
ddf5de53 | 1059 | spin_unlock(¶hotplug_request_list_lock); |
2ea5117b | 1060 | req->msg.cmd.device_change_state.state.active = active; |
98d7b594 | 1061 | if (req->msg.hdr.flags.response_expected) |
4c0e65f8 DK |
1062 | controlvm_respond( |
1063 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, | |
1064 | &req->msg.cmd.device_change_state.state); | |
12e364b9 KC |
1065 | parahotplug_request_destroy(req); |
1066 | return 0; | |
1067 | } | |
1068 | } | |
1069 | ||
ddf5de53 | 1070 | spin_unlock(¶hotplug_request_list_lock); |
119296ea | 1071 | return -EINVAL; |
12e364b9 KC |
1072 | } |
1073 | ||
04dbfea6 | 1074 | /* |
ebeff055 DK |
1075 | * devicedisabled_store() - disables the hotplug device |
1076 | * @dev: sysfs interface variable not utilized in this function | |
1077 | * @attr: sysfs interface variable not utilized in this function | |
1078 | * @buf: buffer containing the device id | |
1079 | * @count: the size of the buffer | |
1080 | * | |
1081 | * The parahotplug/devicedisabled interface gets called by our support script | |
1082 | * when an SR-IOV device has been shut down. The ID is passed to the script | |
1083 | * and then passed back when the device has been removed. | |
1084 | * | |
1085 | * Return: the size of the buffer for success or negative for error | |
1086 | */ | |
1087 | static ssize_t devicedisabled_store(struct device *dev, | |
1088 | struct device_attribute *attr, | |
1089 | const char *buf, size_t count) | |
1090 | { | |
1091 | unsigned int id; | |
1092 | int err; | |
1093 | ||
1094 | if (kstrtouint(buf, 10, &id)) | |
1095 | return -EINVAL; | |
1096 | ||
1097 | err = parahotplug_request_complete(id, 0); | |
1098 | if (err < 0) | |
1099 | return err; | |
1100 | return count; | |
1101 | } | |
1102 | static DEVICE_ATTR_WO(devicedisabled); | |
1103 | ||
04dbfea6 | 1104 | /* |
ebeff055 DK |
1105 | * deviceenabled_store() - enables the hotplug device |
1106 | * @dev: sysfs interface variable not utilized in this function | |
1107 | * @attr: sysfs interface variable not utilized in this function | |
1108 | * @buf: buffer containing the device id | |
1109 | * @count: the size of the buffer | |
1110 | * | |
1111 | * The parahotplug/deviceenabled interface gets called by our support script | |
1112 | * when an SR-IOV device has been recovered. The ID is passed to the script | |
1113 | * and then passed back when the device has been brought back up. | |
1114 | * | |
1115 | * Return: the size of the buffer for success or negative for error | |
1116 | */ | |
1117 | static ssize_t deviceenabled_store(struct device *dev, | |
1118 | struct device_attribute *attr, | |
1119 | const char *buf, size_t count) | |
1120 | { | |
1121 | unsigned int id; | |
1122 | ||
1123 | if (kstrtouint(buf, 10, &id)) | |
1124 | return -EINVAL; | |
1125 | ||
1126 | parahotplug_request_complete(id, 1); | |
1127 | return count; | |
1128 | } | |
1129 | static DEVICE_ATTR_WO(deviceenabled); | |
1130 | ||
1131 | static struct attribute *visorchipset_install_attrs[] = { | |
1132 | &dev_attr_toolaction.attr, | |
1133 | &dev_attr_boottotool.attr, | |
1134 | &dev_attr_error.attr, | |
1135 | &dev_attr_textid.attr, | |
1136 | &dev_attr_remaining_steps.attr, | |
1137 | NULL | |
1138 | }; | |
1139 | ||
a2d1e428 | 1140 | static const struct attribute_group visorchipset_install_group = { |
ebeff055 DK |
1141 | .name = "install", |
1142 | .attrs = visorchipset_install_attrs | |
1143 | }; | |
1144 | ||
1145 | static struct attribute *visorchipset_parahotplug_attrs[] = { | |
1146 | &dev_attr_devicedisabled.attr, | |
1147 | &dev_attr_deviceenabled.attr, | |
1148 | NULL | |
1149 | }; | |
1150 | ||
1722270b | 1151 | static const struct attribute_group visorchipset_parahotplug_group = { |
ebeff055 DK |
1152 | .name = "parahotplug", |
1153 | .attrs = visorchipset_parahotplug_attrs | |
1154 | }; | |
1155 | ||
1156 | static const struct attribute_group *visorchipset_dev_groups[] = { | |
1157 | &visorchipset_install_group, | |
1158 | &visorchipset_parahotplug_group, | |
1159 | NULL | |
1160 | }; | |
1161 | ||
04dbfea6 | 1162 | /* |
ebeff055 DK |
1163 | * parahotplug_request_kickoff() - initiate parahotplug request |
1164 | * @req: the request to initiate | |
1165 | * | |
1166 | * Cause uevent to run the user level script to do the disable/enable specified | |
1167 | * in the parahotplug_request. | |
1168 | */ | |
e80ffd4b | 1169 | static int parahotplug_request_kickoff(struct parahotplug_request *req) |
ebeff055 DK |
1170 | { |
1171 | struct controlvm_message_packet *cmd = &req->msg.cmd; | |
1172 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], | |
1173 | env_func[40]; | |
1174 | char *envp[] = { | |
1175 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL | |
1176 | }; | |
1177 | ||
c5a28902 SW |
1178 | sprintf(env_cmd, "VISOR_PARAHOTPLUG=1"); |
1179 | sprintf(env_id, "VISOR_PARAHOTPLUG_ID=%d", req->id); | |
1180 | sprintf(env_state, "VISOR_PARAHOTPLUG_STATE=%d", | |
ebeff055 | 1181 | cmd->device_change_state.state.active); |
c5a28902 | 1182 | sprintf(env_bus, "VISOR_PARAHOTPLUG_BUS=%d", |
ebeff055 | 1183 | cmd->device_change_state.bus_no); |
c5a28902 | 1184 | sprintf(env_dev, "VISOR_PARAHOTPLUG_DEVICE=%d", |
ebeff055 | 1185 | cmd->device_change_state.dev_no >> 3); |
c5a28902 | 1186 | sprintf(env_func, "VISOR_PARAHOTPLUG_FUNCTION=%d", |
ebeff055 DK |
1187 | cmd->device_change_state.dev_no & 0x7); |
1188 | ||
ae0fa822 DK |
1189 | return kobject_uevent_env(&chipset_dev->acpi_device->dev.kobj, |
1190 | KOBJ_CHANGE, envp); | |
ebeff055 DK |
1191 | } |
1192 | ||
04dbfea6 | 1193 | /* |
ec17f452 DB |
1194 | * parahotplug_process_message() - enables or disables a PCI device by kicking |
1195 | * off a udev script | |
1196 | * @inmsg: the message indicating whether to enable or disable | |
12e364b9 | 1197 | */ |
e80ffd4b | 1198 | static int 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); | |
38f736e9 | 1204 | if (!req) |
114d5dcf | 1205 | return -ENOMEM; |
12e364b9 | 1206 | |
d02bde9d DK |
1207 | /* |
1208 | * For enable messages, just respond with success right away, we don't | |
1209 | * need to wait to see if the enable was successful. | |
1210 | */ | |
2ea5117b | 1211 | if (inmsg->cmd.device_change_state.state.active) { |
ae0fa822 DK |
1212 | err = parahotplug_request_kickoff(req); |
1213 | if (err) | |
1214 | goto err_respond; | |
4c0e65f8 DK |
1215 | controlvm_respond(&inmsg->hdr, CONTROLVM_RESP_SUCCESS, |
1216 | &inmsg->cmd.device_change_state.state); | |
12e364b9 | 1217 | parahotplug_request_destroy(req); |
ae0fa822 | 1218 | return 0; |
12e364b9 | 1219 | } |
ae0fa822 DK |
1220 | |
1221 | /* | |
1222 | * For disable messages, add the request to the | |
1223 | * request list before kicking off the udev script. It | |
1224 | * won't get responded to until the script has | |
1225 | * indicated it's done. | |
1226 | */ | |
1227 | spin_lock(¶hotplug_request_list_lock); | |
1228 | list_add_tail(&req->list, ¶hotplug_request_list); | |
1229 | spin_unlock(¶hotplug_request_list_lock); | |
1230 | ||
1231 | err = parahotplug_request_kickoff(req); | |
1232 | if (err) | |
1233 | goto err_respond; | |
114d5dcf | 1234 | return 0; |
ae0fa822 DK |
1235 | |
1236 | err_respond: | |
4c0e65f8 DK |
1237 | controlvm_respond(&inmsg->hdr, err, |
1238 | &inmsg->cmd.device_change_state.state); | |
ae0fa822 | 1239 | return err; |
12e364b9 KC |
1240 | } |
1241 | ||
7289a8dd DB |
1242 | /* |
1243 | * chipset_ready_uevent() - sends chipset_ready action | |
ebeff055 DK |
1244 | * |
1245 | * Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1246 | * | |
7289a8dd | 1247 | * Return: 0 on success, negative on failure |
ebeff055 | 1248 | */ |
e80ffd4b | 1249 | static int chipset_ready_uevent(struct controlvm_message_header *msg_hdr) |
ebeff055 | 1250 | { |
deeeca6d DK |
1251 | int res; |
1252 | ||
1253 | res = kobject_uevent(&chipset_dev->acpi_device->dev.kobj, | |
1254 | KOBJ_ONLINE); | |
7289a8dd DB |
1255 | |
1256 | if (msg_hdr->flags.response_expected) | |
4c0e65f8 | 1257 | controlvm_respond(msg_hdr, res, NULL); |
7289a8dd | 1258 | |
deeeca6d | 1259 | return res; |
ebeff055 DK |
1260 | } |
1261 | ||
7289a8dd DB |
1262 | /* |
1263 | * chipset_selftest_uevent() - sends chipset_selftest action | |
1264 | * | |
1265 | * Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. | |
1266 | * | |
1267 | * Return: 0 on success, negative on failure | |
1268 | */ | |
e80ffd4b | 1269 | static int chipset_selftest_uevent(struct controlvm_message_header *msg_hdr) |
ebeff055 DK |
1270 | { |
1271 | char env_selftest[20]; | |
1272 | char *envp[] = { env_selftest, NULL }; | |
deeeca6d | 1273 | int res; |
ebeff055 DK |
1274 | |
1275 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); | |
deeeca6d DK |
1276 | res = kobject_uevent_env(&chipset_dev->acpi_device->dev.kobj, |
1277 | KOBJ_CHANGE, envp); | |
7289a8dd DB |
1278 | |
1279 | if (msg_hdr->flags.response_expected) | |
4c0e65f8 | 1280 | controlvm_respond(msg_hdr, res, NULL); |
7289a8dd | 1281 | |
deeeca6d | 1282 | return res; |
ebeff055 DK |
1283 | } |
1284 | ||
7289a8dd DB |
1285 | /* |
1286 | * chipset_notready_uevent() - sends chipset_notready action | |
ebeff055 DK |
1287 | * |
1288 | * Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. | |
1289 | * | |
7289a8dd | 1290 | * Return: 0 on success, negative on failure |
ebeff055 | 1291 | */ |
e80ffd4b | 1292 | static int chipset_notready_uevent(struct controlvm_message_header *msg_hdr) |
ebeff055 | 1293 | { |
904ee62a | 1294 | int res = kobject_uevent(&chipset_dev->acpi_device->dev.kobj, |
deeeca6d | 1295 | KOBJ_OFFLINE); |
904ee62a | 1296 | |
ebeff055 | 1297 | if (msg_hdr->flags.response_expected) |
4c0e65f8 | 1298 | controlvm_respond(msg_hdr, res, NULL); |
ebeff055 | 1299 | |
deeeca6d | 1300 | return res; |
ebeff055 DK |
1301 | } |
1302 | ||
88845f40 DK |
1303 | static int unisys_vmcall(unsigned long tuple, unsigned long param) |
1304 | { | |
1305 | int result = 0; | |
1306 | unsigned int cpuid_eax, cpuid_ebx, cpuid_ecx, cpuid_edx; | |
1307 | unsigned long reg_ebx; | |
1308 | unsigned long reg_ecx; | |
1309 | ||
1310 | reg_ebx = param & 0xFFFFFFFF; | |
1311 | reg_ecx = param >> 32; | |
1312 | ||
1313 | cpuid(0x00000001, &cpuid_eax, &cpuid_ebx, &cpuid_ecx, &cpuid_edx); | |
1314 | if (!(cpuid_ecx & 0x80000000)) | |
1315 | return -EPERM; | |
1316 | ||
1317 | __asm__ __volatile__(".byte 0x00f, 0x001, 0x0c1" : "=a"(result) : | |
1318 | "a"(tuple), "b"(reg_ebx), "c"(reg_ecx)); | |
bd801a07 DK |
1319 | if (result) |
1320 | goto error; | |
1321 | ||
1322 | return 0; | |
ac0aba67 SW |
1323 | /* Need to convert from VMCALL error codes to Linux */ |
1324 | error: | |
bd801a07 DK |
1325 | switch (result) { |
1326 | case VMCALL_RESULT_INVALID_PARAM: | |
1327 | return -EINVAL; | |
1328 | case VMCALL_RESULT_DATA_UNAVAILABLE: | |
1329 | return -ENODEV; | |
1330 | default: | |
1331 | return -EFAULT; | |
1332 | } | |
88845f40 | 1333 | } |
ab61097c | 1334 | |
e80ffd4b CD |
1335 | static unsigned int issue_vmcall_io_controlvm_addr(u64 *control_addr, |
1336 | u32 *control_bytes) | |
5f3a7e36 | 1337 | { |
800da5fb DK |
1338 | u64 physaddr; |
1339 | int err; | |
1340 | ||
1341 | physaddr = virt_to_phys(&chipset_dev->controlvm_params); | |
1342 | err = unisys_vmcall(VMCALL_CONTROLVM_ADDR, physaddr); | |
1343 | if (err) | |
1344 | return err; | |
1345 | ||
1346 | *control_addr = chipset_dev->controlvm_params.address; | |
1347 | *control_bytes = chipset_dev->controlvm_params.channel_bytes; | |
bd801a07 DK |
1348 | |
1349 | return 0; | |
5f3a7e36 DK |
1350 | } |
1351 | ||
d5b3f1dc | 1352 | static u64 controlvm_get_channel_address(void) |
524b0b63 | 1353 | { |
5fc0229a | 1354 | u64 addr = 0; |
b3c55b13 | 1355 | u32 size = 0; |
524b0b63 | 1356 | |
bd801a07 | 1357 | if (issue_vmcall_io_controlvm_addr(&addr, &size)) |
524b0b63 | 1358 | return 0; |
0aca7844 | 1359 | |
524b0b63 BR |
1360 | return addr; |
1361 | } | |
1362 | ||
e80ffd4b | 1363 | static void setup_crash_devices_work_queue(struct work_struct *work) |
12e364b9 | 1364 | { |
e6bdb904 BR |
1365 | struct controlvm_message local_crash_bus_msg; |
1366 | struct controlvm_message local_crash_dev_msg; | |
3ab47701 | 1367 | struct controlvm_message msg; |
e6bdb904 BR |
1368 | u32 local_crash_msg_offset; |
1369 | u16 local_crash_msg_count; | |
12e364b9 | 1370 | |
12e364b9 | 1371 | /* send init chipset msg */ |
98d7b594 | 1372 | msg.hdr.id = CONTROLVM_CHIPSET_INIT; |
2ea5117b BR |
1373 | msg.cmd.init_chipset.bus_count = 23; |
1374 | msg.cmd.init_chipset.switch_count = 0; | |
12e364b9 KC |
1375 | |
1376 | chipset_init(&msg); | |
1377 | ||
12e364b9 | 1378 | /* get saved message count */ |
765b2f82 | 1379 | if (visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 1380 | offsetof(struct visor_controlvm_channel, |
d19642f6 | 1381 | saved_crash_message_count), |
e6bdb904 | 1382 | &local_crash_msg_count, sizeof(u16)) < 0) { |
0f7453af DK |
1383 | dev_err(&chipset_dev->acpi_device->dev, |
1384 | "failed to read channel\n"); | |
12e364b9 KC |
1385 | return; |
1386 | } | |
1387 | ||
e6bdb904 | 1388 | if (local_crash_msg_count != CONTROLVM_CRASHMSG_MAX) { |
0f7453af DK |
1389 | dev_err(&chipset_dev->acpi_device->dev, |
1390 | "invalid count\n"); | |
12e364b9 KC |
1391 | return; |
1392 | } | |
1393 | ||
1394 | /* get saved crash message offset */ | |
765b2f82 | 1395 | if (visorchannel_read(chipset_dev->controlvm_channel, |
545f0913 | 1396 | offsetof(struct visor_controlvm_channel, |
d19642f6 | 1397 | saved_crash_message_offset), |
e6bdb904 | 1398 | &local_crash_msg_offset, sizeof(u32)) < 0) { |
0f7453af DK |
1399 | dev_err(&chipset_dev->acpi_device->dev, |
1400 | "failed to read channel\n"); | |
12e364b9 KC |
1401 | return; |
1402 | } | |
1403 | ||
1404 | /* read create device message for storage bus offset */ | |
765b2f82 | 1405 | if (visorchannel_read(chipset_dev->controlvm_channel, |
e6bdb904 BR |
1406 | local_crash_msg_offset, |
1407 | &local_crash_bus_msg, | |
3ab47701 | 1408 | sizeof(struct controlvm_message)) < 0) { |
0f7453af DK |
1409 | dev_err(&chipset_dev->acpi_device->dev, |
1410 | "failed to read channel\n"); | |
12e364b9 KC |
1411 | return; |
1412 | } | |
1413 | ||
1414 | /* read create device message for storage device */ | |
765b2f82 | 1415 | if (visorchannel_read(chipset_dev->controlvm_channel, |
e6bdb904 | 1416 | local_crash_msg_offset + |
3ab47701 | 1417 | sizeof(struct controlvm_message), |
e6bdb904 | 1418 | &local_crash_dev_msg, |
3ab47701 | 1419 | sizeof(struct controlvm_message)) < 0) { |
0f7453af DK |
1420 | dev_err(&chipset_dev->acpi_device->dev, |
1421 | "failed to read channel\n"); | |
12e364b9 KC |
1422 | return; |
1423 | } | |
1424 | ||
1425 | /* reuse IOVM create bus message */ | |
d9b89ef1 | 1426 | if (!local_crash_bus_msg.cmd.create_bus.channel_addr) { |
0f7453af DK |
1427 | dev_err(&chipset_dev->acpi_device->dev, |
1428 | "no valid create_bus message\n"); | |
12e364b9 KC |
1429 | return; |
1430 | } | |
ec17cb8a | 1431 | visorbus_create(&local_crash_bus_msg); |
12e364b9 KC |
1432 | |
1433 | /* reuse create device message for storage device */ | |
d9b89ef1 | 1434 | if (!local_crash_dev_msg.cmd.create_device.channel_addr) { |
0f7453af DK |
1435 | dev_err(&chipset_dev->acpi_device->dev, |
1436 | "no valid create_device message\n"); | |
12e364b9 KC |
1437 | return; |
1438 | } | |
8b0a6cfa | 1439 | visorbus_device_create(&local_crash_dev_msg); |
12e364b9 KC |
1440 | } |
1441 | ||
76956aa7 SW |
1442 | void visorbus_response(struct visor_device *bus_info, int response, |
1443 | int controlvm_id) | |
12e364b9 | 1444 | { |
76956aa7 | 1445 | controlvm_responder(controlvm_id, bus_info->pending_msg_hdr, response); |
0274b5ae DZ |
1446 | |
1447 | kfree(bus_info->pending_msg_hdr); | |
1448 | bus_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1449 | } |
1450 | ||
722e73d5 SW |
1451 | void visorbus_device_changestate_response(struct visor_device *dev_info, |
1452 | int response, | |
1453 | struct visor_segment_state state) | |
12e364b9 KC |
1454 | { |
1455 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, | |
722e73d5 | 1456 | dev_info, response, state); |
0274b5ae DZ |
1457 | |
1458 | kfree(dev_info->pending_msg_hdr); | |
1459 | dev_info->pending_msg_hdr = NULL; | |
12e364b9 KC |
1460 | } |
1461 | ||
e80ffd4b CD |
1462 | static struct parser_context *parser_init_byte_stream(u64 addr, u32 bytes, |
1463 | bool *retry) | |
612b81c9 DK |
1464 | { |
1465 | int allocbytes = sizeof(struct parser_context) + bytes; | |
1466 | struct parser_context *ctx; | |
a35e3268 | 1467 | void *mapping; |
612b81c9 | 1468 | |
3e4273db | 1469 | *retry = false; |
612b81c9 DK |
1470 | |
1471 | /* | |
1472 | * alloc an 0 extra byte to ensure payload is | |
1473 | * '\0'-terminated | |
1474 | */ | |
1475 | allocbytes++; | |
765b2f82 | 1476 | if ((chipset_dev->controlvm_payload_bytes_buffered + bytes) |
612b81c9 | 1477 | > MAX_CONTROLVM_PAYLOAD_BYTES) { |
3e4273db | 1478 | *retry = true; |
612b81c9 DK |
1479 | return NULL; |
1480 | } | |
8c8c975f | 1481 | ctx = kzalloc(allocbytes, GFP_KERNEL); |
612b81c9 | 1482 | if (!ctx) { |
3e4273db | 1483 | *retry = true; |
612b81c9 DK |
1484 | return NULL; |
1485 | } | |
1486 | ||
1487 | ctx->allocbytes = allocbytes; | |
1488 | ctx->param_bytes = bytes; | |
1489 | ctx->curr = NULL; | |
1490 | ctx->bytes_remaining = 0; | |
1491 | ctx->byte_stream = false; | |
a35e3268 EA |
1492 | mapping = memremap(addr, bytes, MEMREMAP_WB); |
1493 | if (!mapping) | |
1494 | goto err_finish_ctx; | |
1495 | memcpy(ctx->data, mapping, bytes); | |
1496 | memunmap(mapping); | |
612b81c9 | 1497 | ctx->byte_stream = true; |
765b2f82 | 1498 | chipset_dev->controlvm_payload_bytes_buffered += ctx->param_bytes; |
612b81c9 DK |
1499 | |
1500 | return ctx; | |
1501 | ||
1502 | err_finish_ctx: | |
90544cb1 | 1503 | kfree(ctx); |
612b81c9 DK |
1504 | return NULL; |
1505 | } | |
1506 | ||
04dbfea6 | 1507 | /* |
511474a5 DK |
1508 | * handle_command() - process a controlvm message |
1509 | * @inmsg: the message to process | |
1510 | * @channel_addr: address of the controlvm channel | |
1511 | * | |
1512 | * Return: | |
25a5128e DK |
1513 | * 0 - Successfully processed the message |
1514 | * -EAGAIN - ControlVM message was not processed and should be retried | |
1515 | * reading the next controlvm message; a scenario where this can | |
1516 | * occur is when we need to throttle the allocation of memory in | |
1517 | * which to copy out controlvm payload data. | |
1518 | * < 0 - error: ControlVM message was processed but an error occurred. | |
511474a5 | 1519 | */ |
e80ffd4b | 1520 | static int handle_command(struct controlvm_message inmsg, u64 channel_addr) |
511474a5 DK |
1521 | { |
1522 | struct controlvm_message_packet *cmd = &inmsg.cmd; | |
1523 | u64 parm_addr; | |
1524 | u32 parm_bytes; | |
1525 | struct parser_context *parser_ctx = NULL; | |
511474a5 | 1526 | struct controlvm_message ackmsg; |
25a5128e | 1527 | int err = 0; |
511474a5 DK |
1528 | |
1529 | /* create parsing context if necessary */ | |
511474a5 DK |
1530 | parm_addr = channel_addr + inmsg.hdr.payload_vm_offset; |
1531 | parm_bytes = inmsg.hdr.payload_bytes; | |
1532 | ||
1533 | /* | |
1534 | * Parameter and channel addresses within test messages actually lie | |
1535 | * within our OS-controlled memory. We need to know that, because it | |
1536 | * makes a difference in how we compute the virtual address. | |
1537 | */ | |
1538 | if (parm_addr && parm_bytes) { | |
1539 | bool retry = false; | |
1540 | ||
1541 | parser_ctx = | |
a35e3268 | 1542 | parser_init_byte_stream(parm_addr, parm_bytes, &retry); |
511474a5 | 1543 | if (!parser_ctx && retry) |
25a5128e | 1544 | return -EAGAIN; |
511474a5 | 1545 | } |
a35e3268 EA |
1546 | controlvm_init_response(&ackmsg, &inmsg.hdr, CONTROLVM_RESP_SUCCESS); |
1547 | err = visorchannel_signalinsert(chipset_dev->controlvm_channel, | |
1548 | CONTROLVM_QUEUE_ACK, &ackmsg); | |
1549 | if (err) | |
1550 | return err; | |
511474a5 | 1551 | |
511474a5 DK |
1552 | switch (inmsg.hdr.id) { |
1553 | case CONTROLVM_CHIPSET_INIT: | |
25a5128e | 1554 | err = chipset_init(&inmsg); |
511474a5 DK |
1555 | break; |
1556 | case CONTROLVM_BUS_CREATE: | |
ec17cb8a | 1557 | err = visorbus_create(&inmsg); |
511474a5 DK |
1558 | break; |
1559 | case CONTROLVM_BUS_DESTROY: | |
ec17cb8a | 1560 | err = visorbus_destroy(&inmsg); |
511474a5 DK |
1561 | break; |
1562 | case CONTROLVM_BUS_CONFIGURE: | |
ec17cb8a | 1563 | err = visorbus_configure(&inmsg, parser_ctx); |
511474a5 DK |
1564 | break; |
1565 | case CONTROLVM_DEVICE_CREATE: | |
8b0a6cfa | 1566 | err = visorbus_device_create(&inmsg); |
511474a5 DK |
1567 | break; |
1568 | case CONTROLVM_DEVICE_CHANGESTATE: | |
1569 | if (cmd->device_change_state.flags.phys_device) { | |
25a5128e | 1570 | err = parahotplug_process_message(&inmsg); |
511474a5 DK |
1571 | } else { |
1572 | /* | |
1573 | * save the hdr and cmd structures for later use | |
1574 | * when sending back the response to Command | |
1575 | */ | |
8b0a6cfa | 1576 | err = visorbus_device_changestate(&inmsg); |
511474a5 DK |
1577 | break; |
1578 | } | |
1579 | break; | |
1580 | case CONTROLVM_DEVICE_DESTROY: | |
8b0a6cfa | 1581 | err = visorbus_device_destroy(&inmsg); |
511474a5 DK |
1582 | break; |
1583 | case CONTROLVM_DEVICE_CONFIGURE: | |
25a5128e | 1584 | /* no op just send a respond that we passed */ |
511474a5 | 1585 | if (inmsg.hdr.flags.response_expected) |
4c0e65f8 DK |
1586 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS, |
1587 | NULL); | |
511474a5 DK |
1588 | break; |
1589 | case CONTROLVM_CHIPSET_READY: | |
25a5128e | 1590 | err = chipset_ready_uevent(&inmsg.hdr); |
511474a5 DK |
1591 | break; |
1592 | case CONTROLVM_CHIPSET_SELFTEST: | |
25a5128e | 1593 | err = chipset_selftest_uevent(&inmsg.hdr); |
511474a5 DK |
1594 | break; |
1595 | case CONTROLVM_CHIPSET_STOP: | |
25a5128e | 1596 | err = chipset_notready_uevent(&inmsg.hdr); |
511474a5 DK |
1597 | break; |
1598 | default: | |
25a5128e | 1599 | err = -ENOMSG; |
511474a5 | 1600 | if (inmsg.hdr.flags.response_expected) |
25a5128e | 1601 | controlvm_respond(&inmsg.hdr, |
4c0e65f8 | 1602 | -CONTROLVM_RESP_ID_UNKNOWN, NULL); |
511474a5 DK |
1603 | break; |
1604 | } | |
1605 | ||
1606 | if (parser_ctx) { | |
1607 | parser_done(parser_ctx); | |
1608 | parser_ctx = NULL; | |
1609 | } | |
25a5128e | 1610 | return err; |
511474a5 DK |
1611 | } |
1612 | ||
04dbfea6 | 1613 | /* |
8a285327 DK |
1614 | * read_controlvm_event() - retreives the next message from the |
1615 | * CONTROLVM_QUEUE_EVENT queue in the controlvm | |
1616 | * channel | |
1617 | * @msg: pointer to the retrieved message | |
1618 | * | |
25a5128e | 1619 | * Return: 0 if valid message was retrieved or -error |
8a285327 | 1620 | */ |
e80ffd4b | 1621 | static int read_controlvm_event(struct controlvm_message *msg) |
8a285327 | 1622 | { |
904ee62a | 1623 | int err = visorchannel_signalremove(chipset_dev->controlvm_channel, |
25a5128e DK |
1624 | CONTROLVM_QUEUE_EVENT, msg); |
1625 | if (err) | |
1626 | return err; | |
1627 | ||
1628 | /* got a message */ | |
1629 | if (msg->hdr.flags.test_message == 1) | |
1630 | return -EINVAL; | |
1631 | ||
1632 | return 0; | |
8a285327 DK |
1633 | } |
1634 | ||
04dbfea6 | 1635 | /* |
a9c73937 DK |
1636 | * parahotplug_process_list() - remove any request from the list that's been on |
1637 | * there too long and respond with an error | |
1638 | */ | |
e80ffd4b | 1639 | static void parahotplug_process_list(void) |
a9c73937 DK |
1640 | { |
1641 | struct list_head *pos; | |
1642 | struct list_head *tmp; | |
1643 | ||
1644 | spin_lock(¶hotplug_request_list_lock); | |
1645 | ||
1646 | list_for_each_safe(pos, tmp, ¶hotplug_request_list) { | |
1647 | struct parahotplug_request *req = | |
1648 | list_entry(pos, struct parahotplug_request, list); | |
1649 | ||
1650 | if (!time_after_eq(jiffies, req->expiration)) | |
1651 | continue; | |
1652 | ||
1653 | list_del(pos); | |
1654 | if (req->msg.hdr.flags.response_expected) | |
4c0e65f8 | 1655 | controlvm_respond( |
a9c73937 | 1656 | &req->msg.hdr, |
98f9ed9e | 1657 | CONTROLVM_RESP_DEVICE_UDEV_TIMEOUT, |
4c0e65f8 | 1658 | &req->msg.cmd.device_change_state.state); |
a9c73937 DK |
1659 | parahotplug_request_destroy(req); |
1660 | } | |
1661 | ||
1662 | spin_unlock(¶hotplug_request_list_lock); | |
1663 | } | |
1664 | ||
e80ffd4b | 1665 | static void controlvm_periodic_work(struct work_struct *work) |
3d8394c8 DK |
1666 | { |
1667 | struct controlvm_message inmsg; | |
04dbc09b | 1668 | int count = 0; |
fbc1023a DK |
1669 | int err; |
1670 | ||
1671 | /* Drain the RESPONSE queue make it empty */ | |
1672 | do { | |
1673 | err = visorchannel_signalremove(chipset_dev->controlvm_channel, | |
1674 | CONTROLVM_QUEUE_RESPONSE, | |
1675 | &inmsg); | |
04dbc09b | 1676 | } while ((!err) && (++count < CONTROLVM_MESSAGE_MAX)); |
fbc1023a DK |
1677 | |
1678 | if (err != -EAGAIN) | |
1679 | goto schedule_out; | |
1680 | ||
1681 | if (chipset_dev->controlvm_pending_msg_valid) { | |
1682 | /* | |
1683 | * we throttled processing of a prior | |
1684 | * msg, so try to process it again | |
1685 | * rather than reading a new one | |
1686 | */ | |
1687 | inmsg = chipset_dev->controlvm_pending_msg; | |
1688 | chipset_dev->controlvm_pending_msg_valid = false; | |
1689 | err = 0; | |
1690 | } else { | |
1691 | err = read_controlvm_event(&inmsg); | |
3d8394c8 DK |
1692 | } |
1693 | ||
fbc1023a | 1694 | while (!err) { |
765b2f82 | 1695 | chipset_dev->most_recent_message_jiffies = jiffies; |
fbc1023a DK |
1696 | err = handle_command(inmsg, |
1697 | visorchannel_get_physaddr | |
1698 | (chipset_dev->controlvm_channel)); | |
1699 | if (err == -EAGAIN) { | |
765b2f82 SW |
1700 | chipset_dev->controlvm_pending_msg = inmsg; |
1701 | chipset_dev->controlvm_pending_msg_valid = true; | |
fbc1023a | 1702 | break; |
3d8394c8 | 1703 | } |
fbc1023a DK |
1704 | |
1705 | err = read_controlvm_event(&inmsg); | |
3d8394c8 DK |
1706 | } |
1707 | ||
1708 | /* parahotplug_worker */ | |
1709 | parahotplug_process_list(); | |
1710 | ||
d36c4857 SW |
1711 | /* |
1712 | * The controlvm messages are sent in a bulk. If we start receiving messages, we | |
1713 | * want the polling to be fast. If we do not receive any message for | |
1714 | * MIN_IDLE_SECONDS, we can slow down the polling. | |
1715 | */ | |
fbc1023a | 1716 | schedule_out: |
765b2f82 SW |
1717 | if (time_after(jiffies, chipset_dev->most_recent_message_jiffies + |
1718 | (HZ * MIN_IDLE_SECONDS))) { | |
3d8394c8 DK |
1719 | /* |
1720 | * it's been longer than MIN_IDLE_SECONDS since we | |
1721 | * processed our last controlvm message; slow down the | |
1722 | * polling | |
1723 | */ | |
765b2f82 SW |
1724 | if (chipset_dev->poll_jiffies != |
1725 | POLLJIFFIES_CONTROLVMCHANNEL_SLOW) | |
1726 | chipset_dev->poll_jiffies = | |
1727 | POLLJIFFIES_CONTROLVMCHANNEL_SLOW; | |
3d8394c8 | 1728 | } else { |
765b2f82 SW |
1729 | if (chipset_dev->poll_jiffies != |
1730 | POLLJIFFIES_CONTROLVMCHANNEL_FAST) | |
1731 | chipset_dev->poll_jiffies = | |
1732 | POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
3d8394c8 DK |
1733 | } |
1734 | ||
765b2f82 SW |
1735 | schedule_delayed_work(&chipset_dev->periodic_controlvm_work, |
1736 | chipset_dev->poll_jiffies); | |
3d8394c8 DK |
1737 | } |
1738 | ||
e80ffd4b | 1739 | static int visorchipset_init(struct acpi_device *acpi_device) |
12e364b9 | 1740 | { |
1366a3db | 1741 | int err = -ENODEV; |
d5b3f1dc | 1742 | u64 addr; |
765b2f82 | 1743 | struct visorchannel *controlvm_channel; |
d3368a58 | 1744 | |
765b2f82 SW |
1745 | chipset_dev = kzalloc(sizeof(*chipset_dev), GFP_KERNEL); |
1746 | if (!chipset_dev) | |
1366a3db DK |
1747 | goto error; |
1748 | ||
bb1fb8ac SW |
1749 | addr = controlvm_get_channel_address(); |
1750 | if (!addr) | |
1751 | goto error; | |
1752 | ||
765b2f82 | 1753 | acpi_device->driver_data = chipset_dev; |
765b2f82 SW |
1754 | chipset_dev->acpi_device = acpi_device; |
1755 | chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
b32c5cb8 AS |
1756 | controlvm_channel = visorchannel_create_with_lock(addr, 0, GFP_KERNEL, |
1757 | &visor_controlvm_channel_guid); | |
765b2f82 SW |
1758 | if (!controlvm_channel) |
1759 | goto error_free_chipset_dev; | |
1760 | ||
1761 | chipset_dev->controlvm_channel = controlvm_channel; | |
15c012d5 SW |
1762 | |
1763 | err = sysfs_create_groups(&chipset_dev->acpi_device->dev.kobj, | |
1764 | visorchipset_dev_groups); | |
1765 | if (err < 0) | |
1766 | goto error_destroy_channel; | |
1767 | ||
403043c4 | 1768 | if (!visor_check_channel(visorchannel_get_header(controlvm_channel), |
b32c5cb8 | 1769 | &visor_controlvm_channel_guid, |
403043c4 SW |
1770 | "controlvm", |
1771 | sizeof(struct visor_controlvm_channel), | |
1772 | VISOR_CONTROLVM_CHANNEL_VERSIONID, | |
1773 | VISOR_CHANNEL_SIGNATURE)) | |
15c012d5 | 1774 | goto error_delete_groups; |
8a1182eb | 1775 | |
4da3336c DK |
1776 | /* if booting in a crash kernel */ |
1777 | if (is_kdump_kernel()) | |
765b2f82 | 1778 | INIT_DELAYED_WORK(&chipset_dev->periodic_controlvm_work, |
4da3336c DK |
1779 | setup_crash_devices_work_queue); |
1780 | else | |
765b2f82 | 1781 | INIT_DELAYED_WORK(&chipset_dev->periodic_controlvm_work, |
4da3336c | 1782 | controlvm_periodic_work); |
4da3336c | 1783 | |
765b2f82 SW |
1784 | chipset_dev->most_recent_message_jiffies = jiffies; |
1785 | chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; | |
1786 | schedule_delayed_work(&chipset_dev->periodic_controlvm_work, | |
1787 | chipset_dev->poll_jiffies); | |
12e364b9 | 1788 | |
1366a3db DK |
1789 | err = visorbus_init(); |
1790 | if (err < 0) | |
15c012d5 | 1791 | goto error_cancel_work; |
12e364b9 | 1792 | |
1366a3db DK |
1793 | return 0; |
1794 | ||
1366a3db | 1795 | error_cancel_work: |
765b2f82 | 1796 | cancel_delayed_work_sync(&chipset_dev->periodic_controlvm_work); |
1366a3db | 1797 | |
15c012d5 SW |
1798 | error_delete_groups: |
1799 | sysfs_remove_groups(&chipset_dev->acpi_device->dev.kobj, | |
1800 | visorchipset_dev_groups); | |
1801 | ||
1366a3db | 1802 | error_destroy_channel: |
765b2f82 SW |
1803 | visorchannel_destroy(chipset_dev->controlvm_channel); |
1804 | ||
1805 | error_free_chipset_dev: | |
1806 | kfree(chipset_dev); | |
1366a3db DK |
1807 | |
1808 | error: | |
372b9f22 | 1809 | dev_err(&acpi_device->dev, "failed with error %d\n", err); |
1366a3db | 1810 | return err; |
e3420ed6 EA |
1811 | } |
1812 | ||
e80ffd4b | 1813 | static int visorchipset_exit(struct acpi_device *acpi_device) |
12e364b9 | 1814 | { |
c79b28f7 | 1815 | visorbus_exit(); |
765b2f82 | 1816 | cancel_delayed_work_sync(&chipset_dev->periodic_controlvm_work); |
15c012d5 SW |
1817 | sysfs_remove_groups(&chipset_dev->acpi_device->dev.kobj, |
1818 | visorchipset_dev_groups); | |
1819 | ||
765b2f82 | 1820 | visorchannel_destroy(chipset_dev->controlvm_channel); |
765b2f82 SW |
1821 | kfree(chipset_dev); |
1822 | ||
55c67dca PB |
1823 | return 0; |
1824 | } | |
1825 | ||
1826 | static const struct acpi_device_id unisys_device_ids[] = { | |
1827 | {"PNP0A07", 0}, | |
1828 | {"", 0}, | |
1829 | }; | |
55c67dca PB |
1830 | |
1831 | static struct acpi_driver unisys_acpi_driver = { | |
1832 | .name = "unisys_acpi", | |
1833 | .class = "unisys_acpi_class", | |
1834 | .owner = THIS_MODULE, | |
1835 | .ids = unisys_device_ids, | |
1836 | .ops = { | |
1837 | .add = visorchipset_init, | |
1838 | .remove = visorchipset_exit, | |
027b03e7 | 1839 | }, |
55c67dca | 1840 | }; |
1fc07f99 DK |
1841 | |
1842 | MODULE_DEVICE_TABLE(acpi, unisys_device_ids); | |
1843 | ||
c1d28da7 | 1844 | static __init int visorutil_spar_detect(void) |
d5b3f1dc EA |
1845 | { |
1846 | unsigned int eax, ebx, ecx, edx; | |
1847 | ||
0c9f3536 | 1848 | if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) { |
d5b3f1dc | 1849 | /* check the ID */ |
a27ded92 SW |
1850 | cpuid(UNISYS_VISOR_LEAF_ID, &eax, &ebx, &ecx, &edx); |
1851 | return (ebx == UNISYS_VISOR_ID_EBX) && | |
1852 | (ecx == UNISYS_VISOR_ID_ECX) && | |
1853 | (edx == UNISYS_VISOR_ID_EDX); | |
d5b3f1dc EA |
1854 | } else { |
1855 | return 0; | |
1856 | } | |
1857 | } | |
55c67dca PB |
1858 | |
1859 | static int init_unisys(void) | |
1860 | { | |
1861 | int result; | |
35e606de | 1862 | |
d5b3f1dc | 1863 | if (!visorutil_spar_detect()) |
55c67dca PB |
1864 | return -ENODEV; |
1865 | ||
1866 | result = acpi_bus_register_driver(&unisys_acpi_driver); | |
1867 | if (result) | |
1868 | return -ENODEV; | |
1869 | ||
1870 | pr_info("Unisys Visorchipset Driver Loaded.\n"); | |
1871 | return 0; | |
1872 | }; | |
1873 | ||
1874 | static void exit_unisys(void) | |
1875 | { | |
1876 | acpi_bus_unregister_driver(&unisys_acpi_driver); | |
12e364b9 KC |
1877 | } |
1878 | ||
55c67dca PB |
1879 | module_init(init_unisys); |
1880 | module_exit(exit_unisys); | |
12e364b9 KC |
1881 | |
1882 | MODULE_AUTHOR("Unisys"); | |
1883 | MODULE_LICENSE("GPL"); | |
bff8c1a1 | 1884 | MODULE_DESCRIPTION("s-Par visorbus driver for virtual device buses"); |