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