| 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 "globals.h" |
| 19 | #include "visorchipset.h" |
| 20 | #include "procobjecttree.h" |
| 21 | #include "visorchannel.h" |
| 22 | #include "periodic_work.h" |
| 23 | #include "testing.h" |
| 24 | #include "file.h" |
| 25 | #include "parser.h" |
| 26 | #include "uniklog.h" |
| 27 | #include "uisutils.h" |
| 28 | #include "controlvmcompletionstatus.h" |
| 29 | #include "guestlinuxdebug.h" |
| 30 | |
| 31 | #include <linux/nls.h> |
| 32 | #include <linux/netdevice.h> |
| 33 | #include <linux/platform_device.h> |
| 34 | #include <linux/uuid.h> |
| 35 | |
| 36 | #define CURRENT_FILE_PC VISOR_CHIPSET_PC_visorchipset_main_c |
| 37 | #define TEST_VNIC_PHYSITF "eth0" /* physical network itf for |
| 38 | * vnic loopback test */ |
| 39 | #define TEST_VNIC_SWITCHNO 1 |
| 40 | #define TEST_VNIC_BUSNO 9 |
| 41 | |
| 42 | #define MAX_NAME_SIZE 128 |
| 43 | #define MAX_IP_SIZE 50 |
| 44 | #define MAXOUTSTANDINGCHANNELCOMMAND 256 |
| 45 | #define POLLJIFFIES_CONTROLVMCHANNEL_FAST 1 |
| 46 | #define POLLJIFFIES_CONTROLVMCHANNEL_SLOW 100 |
| 47 | |
| 48 | /* When the controlvm channel is idle for at least MIN_IDLE_SECONDS, |
| 49 | * we switch to slow polling mode. As soon as we get a controlvm |
| 50 | * message, we switch back to fast polling mode. |
| 51 | */ |
| 52 | #define MIN_IDLE_SECONDS 10 |
| 53 | static ulong Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
| 54 | static ulong Most_recent_message_jiffies; /* when we got our last |
| 55 | * controlvm message */ |
| 56 | static inline char * |
| 57 | NONULLSTR(char *s) |
| 58 | { |
| 59 | if (s) |
| 60 | return s; |
| 61 | else |
| 62 | return ""; |
| 63 | } |
| 64 | |
| 65 | static int serverregistered; |
| 66 | static int clientregistered; |
| 67 | |
| 68 | #define MAX_CHIPSET_EVENTS 2 |
| 69 | static U8 chipset_events[MAX_CHIPSET_EVENTS] = { 0, 0 }; |
| 70 | |
| 71 | static struct delayed_work Periodic_controlvm_work; |
| 72 | static struct workqueue_struct *Periodic_controlvm_workqueue; |
| 73 | static DEFINE_SEMAPHORE(NotifierLock); |
| 74 | |
| 75 | typedef struct { |
| 76 | CONTROLVM_MESSAGE message; |
| 77 | unsigned int crc; |
| 78 | } MESSAGE_ENVELOPE; |
| 79 | |
| 80 | static CONTROLVM_MESSAGE_HEADER g_DiagMsgHdr; |
| 81 | static CONTROLVM_MESSAGE_HEADER g_ChipSetMsgHdr; |
| 82 | static CONTROLVM_MESSAGE_HEADER g_DelDumpMsgHdr; |
| 83 | static const uuid_le UltraDiagPoolChannelProtocolGuid = |
| 84 | ULTRA_DIAG_POOL_CHANNEL_PROTOCOL_GUID; |
| 85 | /* 0xffffff is an invalid Bus/Device number */ |
| 86 | static ulong g_diagpoolBusNo = 0xffffff; |
| 87 | static ulong g_diagpoolDevNo = 0xffffff; |
| 88 | static CONTROLVM_MESSAGE_PACKET g_DeviceChangeStatePacket; |
| 89 | |
| 90 | /* Only VNIC and VHBA channels are sent to visorclientbus (aka |
| 91 | * "visorhackbus") |
| 92 | */ |
| 93 | #define FOR_VISORHACKBUS(channel_type_guid) \ |
| 94 | (((uuid_le_cmp(channel_type_guid, UltraVnicChannelProtocolGuid) == 0)\ |
| 95 | || (uuid_le_cmp(channel_type_guid, UltraVhbaChannelProtocolGuid) == 0))) |
| 96 | #define FOR_VISORBUS(channel_type_guid) (!(FOR_VISORHACKBUS(channel_type_guid))) |
| 97 | |
| 98 | #define is_diagpool_channel(channel_type_guid) \ |
| 99 | (uuid_le_cmp(channel_type_guid, UltraDiagPoolChannelProtocolGuid) == 0) |
| 100 | |
| 101 | typedef enum { |
| 102 | PARTPROP_invalid, |
| 103 | PARTPROP_name, |
| 104 | PARTPROP_description, |
| 105 | PARTPROP_handle, |
| 106 | PARTPROP_busNumber, |
| 107 | /* add new properties above, but don't forget to change |
| 108 | * InitPartitionProperties() and show_partition_property() also... |
| 109 | */ |
| 110 | PARTPROP_last |
| 111 | } PARTITION_property; |
| 112 | static const char *PartitionTypeNames[] = { "partition", NULL }; |
| 113 | |
| 114 | static char *PartitionPropertyNames[PARTPROP_last + 1]; |
| 115 | static void |
| 116 | InitPartitionProperties(void) |
| 117 | { |
| 118 | char **p = PartitionPropertyNames; |
| 119 | p[PARTPROP_invalid] = ""; |
| 120 | p[PARTPROP_name] = "name"; |
| 121 | p[PARTPROP_description] = "description"; |
| 122 | p[PARTPROP_handle] = "handle"; |
| 123 | p[PARTPROP_busNumber] = "busNumber"; |
| 124 | p[PARTPROP_last] = NULL; |
| 125 | } |
| 126 | |
| 127 | static MYPROCTYPE *PartitionType; |
| 128 | |
| 129 | #define VISORCHIPSET_DIAG_PROC_ENTRY_FN "diagdump" |
| 130 | static struct proc_dir_entry *diag_proc_dir; |
| 131 | |
| 132 | #define VISORCHIPSET_CHIPSET_PROC_ENTRY_FN "chipsetready" |
| 133 | static struct proc_dir_entry *chipset_proc_dir; |
| 134 | |
| 135 | #define VISORCHIPSET_PARAHOTPLUG_PROC_ENTRY_FN "parahotplug" |
| 136 | static struct proc_dir_entry *parahotplug_proc_dir; |
| 137 | |
| 138 | static LIST_HEAD(BusInfoList); |
| 139 | static LIST_HEAD(DevInfoList); |
| 140 | |
| 141 | static struct proc_dir_entry *ProcDir; |
| 142 | static VISORCHANNEL *ControlVm_channel; |
| 143 | |
| 144 | static ssize_t visorchipset_proc_read_writeonly(struct file *file, |
| 145 | char __user *buf, |
| 146 | size_t len, loff_t *offset); |
| 147 | |
| 148 | typedef struct { |
| 149 | U8 __iomem *ptr; /* pointer to base address of payload pool */ |
| 150 | U64 offset; /* offset from beginning of controlvm |
| 151 | * channel to beginning of payload * pool */ |
| 152 | U32 bytes; /* number of bytes in payload pool */ |
| 153 | } CONTROLVM_PAYLOAD_INFO; |
| 154 | |
| 155 | /* Manages the request payload in the controlvm channel */ |
| 156 | static CONTROLVM_PAYLOAD_INFO ControlVm_payload_info; |
| 157 | |
| 158 | static pCHANNEL_HEADER Test_Vnic_channel; |
| 159 | |
| 160 | typedef struct { |
| 161 | CONTROLVM_MESSAGE_HEADER Dumpcapture_header; |
| 162 | CONTROLVM_MESSAGE_HEADER Gettextdump_header; |
| 163 | CONTROLVM_MESSAGE_HEADER Dumpcomplete_header; |
| 164 | BOOL Gettextdump_outstanding; |
| 165 | u32 crc32; |
| 166 | ulong length; |
| 167 | atomic_t buffers_in_use; |
| 168 | ulong destination; |
| 169 | } LIVEDUMP_INFO; |
| 170 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / |
| 171 | * CONTROLVM_DUMP_GETTEXTDUMP / CONTROLVM_DUMP_COMPLETE conversation. |
| 172 | */ |
| 173 | static LIVEDUMP_INFO LiveDump_info; |
| 174 | |
| 175 | /* The following globals are used to handle the scenario where we are unable to |
| 176 | * offload the payload from a controlvm message due to memory requirements. In |
| 177 | * this scenario, we simply stash the controlvm message, then attempt to |
| 178 | * process it again the next time controlvm_periodic_work() runs. |
| 179 | */ |
| 180 | static CONTROLVM_MESSAGE ControlVm_Pending_Msg; |
| 181 | static BOOL ControlVm_Pending_Msg_Valid = FALSE; |
| 182 | |
| 183 | /* Pool of struct putfile_buffer_entry, for keeping track of pending (incoming) |
| 184 | * TRANSMIT_FILE PutFile payloads. |
| 185 | */ |
| 186 | static struct kmem_cache *Putfile_buffer_list_pool; |
| 187 | static const char Putfile_buffer_list_pool_name[] = |
| 188 | "controlvm_putfile_buffer_list_pool"; |
| 189 | |
| 190 | /* This identifies a data buffer that has been received via a controlvm messages |
| 191 | * in a remote --> local CONTROLVM_TRANSMIT_FILE conversation. |
| 192 | */ |
| 193 | struct putfile_buffer_entry { |
| 194 | struct list_head next; /* putfile_buffer_entry list */ |
| 195 | PARSER_CONTEXT *parser_ctx; /* points to buffer containing input data */ |
| 196 | }; |
| 197 | |
| 198 | /* List of struct putfile_request *, via next_putfile_request member. |
| 199 | * Each entry in this list identifies an outstanding TRANSMIT_FILE |
| 200 | * conversation. |
| 201 | */ |
| 202 | static LIST_HEAD(Putfile_request_list); |
| 203 | |
| 204 | /* This describes a buffer and its current state of transfer (e.g., how many |
| 205 | * bytes have already been supplied as putfile data, and how many bytes are |
| 206 | * remaining) for a putfile_request. |
| 207 | */ |
| 208 | struct putfile_active_buffer { |
| 209 | /* a payload from a controlvm message, containing a file data buffer */ |
| 210 | PARSER_CONTEXT *parser_ctx; |
| 211 | /* points within data area of parser_ctx to next byte of data */ |
| 212 | u8 *pnext; |
| 213 | /* # bytes left from <pnext> to the end of this data buffer */ |
| 214 | size_t bytes_remaining; |
| 215 | }; |
| 216 | |
| 217 | #define PUTFILE_REQUEST_SIG 0x0906101302281211 |
| 218 | /* This identifies a single remote --> local CONTROLVM_TRANSMIT_FILE |
| 219 | * conversation. Structs of this type are dynamically linked into |
| 220 | * <Putfile_request_list>. |
| 221 | */ |
| 222 | struct putfile_request { |
| 223 | u64 sig; /* PUTFILE_REQUEST_SIG */ |
| 224 | |
| 225 | /* header from original TransmitFile request */ |
| 226 | CONTROLVM_MESSAGE_HEADER controlvm_header; |
| 227 | u64 file_request_number; /* from original TransmitFile request */ |
| 228 | |
| 229 | /* link to next struct putfile_request */ |
| 230 | struct list_head next_putfile_request; |
| 231 | |
| 232 | /* most-recent sequence number supplied via a controlvm message */ |
| 233 | u64 data_sequence_number; |
| 234 | |
| 235 | /* head of putfile_buffer_entry list, which describes the data to be |
| 236 | * supplied as putfile data; |
| 237 | * - this list is added to when controlvm messages come in that supply |
| 238 | * file data |
| 239 | * - this list is removed from via the hotplug program that is actually |
| 240 | * consuming these buffers to write as file data */ |
| 241 | struct list_head input_buffer_list; |
| 242 | spinlock_t req_list_lock; /* lock for input_buffer_list */ |
| 243 | |
| 244 | /* waiters for input_buffer_list to go non-empty */ |
| 245 | wait_queue_head_t input_buffer_wq; |
| 246 | |
| 247 | /* data not yet read within current putfile_buffer_entry */ |
| 248 | struct putfile_active_buffer active_buf; |
| 249 | |
| 250 | /* <0 = failed, 0 = in-progress, >0 = successful; */ |
| 251 | /* note that this must be set with req_list_lock, and if you set <0, */ |
| 252 | /* it is your responsibility to also free up all of the other objects */ |
| 253 | /* in this struct (like input_buffer_list, active_buf.parser_ctx) */ |
| 254 | /* before releasing the lock */ |
| 255 | int completion_status; |
| 256 | }; |
| 257 | |
| 258 | static atomic_t Visorchipset_cache_buffers_in_use = ATOMIC_INIT(0); |
| 259 | |
| 260 | struct parahotplug_request { |
| 261 | struct list_head list; |
| 262 | int id; |
| 263 | unsigned long expiration; |
| 264 | CONTROLVM_MESSAGE msg; |
| 265 | }; |
| 266 | |
| 267 | static LIST_HEAD(Parahotplug_request_list); |
| 268 | static DEFINE_SPINLOCK(Parahotplug_request_list_lock); /* lock for above */ |
| 269 | static void parahotplug_process_list(void); |
| 270 | |
| 271 | /* Manages the info for a CONTROLVM_DUMP_CAPTURESTATE / |
| 272 | * CONTROLVM_REPORTEVENT. |
| 273 | */ |
| 274 | static VISORCHIPSET_BUSDEV_NOTIFIERS BusDev_Server_Notifiers; |
| 275 | static VISORCHIPSET_BUSDEV_NOTIFIERS BusDev_Client_Notifiers; |
| 276 | |
| 277 | static void bus_create_response(ulong busNo, int response); |
| 278 | static void bus_destroy_response(ulong busNo, int response); |
| 279 | static void device_create_response(ulong busNo, ulong devNo, int response); |
| 280 | static void device_destroy_response(ulong busNo, ulong devNo, int response); |
| 281 | static void device_resume_response(ulong busNo, ulong devNo, int response); |
| 282 | |
| 283 | static VISORCHIPSET_BUSDEV_RESPONDERS BusDev_Responders = { |
| 284 | .bus_create = bus_create_response, |
| 285 | .bus_destroy = bus_destroy_response, |
| 286 | .device_create = device_create_response, |
| 287 | .device_destroy = device_destroy_response, |
| 288 | .device_pause = visorchipset_device_pause_response, |
| 289 | .device_resume = device_resume_response, |
| 290 | }; |
| 291 | |
| 292 | /* info for /dev/visorchipset */ |
| 293 | static dev_t MajorDev = -1; /**< indicates major num for device */ |
| 294 | |
| 295 | /* prototypes for attributes */ |
| 296 | static ssize_t toolaction_show(struct device *dev, |
| 297 | struct device_attribute *attr, char *buf); |
| 298 | static ssize_t toolaction_store(struct device *dev, |
| 299 | struct device_attribute *attr, const char *buf, size_t count); |
| 300 | static DEVICE_ATTR_RW(toolaction); |
| 301 | |
| 302 | static ssize_t boottotool_show(struct device *dev, |
| 303 | struct device_attribute *attr, char *buf); |
| 304 | static ssize_t boottotool_store(struct device *dev, |
| 305 | struct device_attribute *attr, const char *buf, size_t count); |
| 306 | static DEVICE_ATTR_RW(boottotool); |
| 307 | |
| 308 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
| 309 | char *buf); |
| 310 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
| 311 | const char *buf, size_t count); |
| 312 | static DEVICE_ATTR_RW(error); |
| 313 | |
| 314 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, |
| 315 | char *buf); |
| 316 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
| 317 | const char *buf, size_t count); |
| 318 | static DEVICE_ATTR_RW(textid); |
| 319 | |
| 320 | static ssize_t remaining_steps_show(struct device *dev, |
| 321 | struct device_attribute *attr, char *buf); |
| 322 | static ssize_t remaining_steps_store(struct device *dev, |
| 323 | struct device_attribute *attr, const char *buf, size_t count); |
| 324 | static DEVICE_ATTR_RW(remaining_steps); |
| 325 | |
| 326 | static struct attribute *visorchipset_install_attrs[] = { |
| 327 | &dev_attr_toolaction.attr, |
| 328 | &dev_attr_boottotool.attr, |
| 329 | &dev_attr_error.attr, |
| 330 | &dev_attr_textid.attr, |
| 331 | &dev_attr_remaining_steps.attr, |
| 332 | NULL |
| 333 | }; |
| 334 | |
| 335 | static struct attribute_group visorchipset_install_group = { |
| 336 | .name = "install", |
| 337 | .attrs = visorchipset_install_attrs |
| 338 | }; |
| 339 | |
| 340 | static const struct attribute_group *visorchipset_dev_groups[] = { |
| 341 | &visorchipset_install_group, |
| 342 | NULL |
| 343 | }; |
| 344 | |
| 345 | /* /sys/devices/platform/visorchipset */ |
| 346 | static struct platform_device Visorchipset_platform_device = { |
| 347 | .name = "visorchipset", |
| 348 | .id = -1, |
| 349 | .dev.groups = visorchipset_dev_groups, |
| 350 | }; |
| 351 | |
| 352 | /* Function prototypes */ |
| 353 | static void controlvm_respond(CONTROLVM_MESSAGE_HEADER *msgHdr, int response); |
| 354 | static void controlvm_respond_chipset_init(CONTROLVM_MESSAGE_HEADER *msgHdr, |
| 355 | int response, |
| 356 | ULTRA_CHIPSET_FEATURE features); |
| 357 | static void controlvm_respond_physdev_changestate(CONTROLVM_MESSAGE_HEADER * |
| 358 | msgHdr, int response, |
| 359 | ULTRA_SEGMENT_STATE state); |
| 360 | |
| 361 | ssize_t toolaction_show(struct device *dev, struct device_attribute *attr, |
| 362 | char *buf) |
| 363 | { |
| 364 | U8 toolAction; |
| 365 | |
| 366 | visorchannel_read(ControlVm_channel, |
| 367 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 368 | ToolAction), &toolAction, sizeof(U8)); |
| 369 | return scnprintf(buf, PAGE_SIZE, "%u\n", toolAction); |
| 370 | } |
| 371 | |
| 372 | ssize_t toolaction_store(struct device *dev, struct device_attribute *attr, |
| 373 | const char *buf, size_t count) |
| 374 | { |
| 375 | U8 toolAction; |
| 376 | |
| 377 | if (sscanf(buf, "%hhu\n", &toolAction) == 1) { |
| 378 | if (visorchannel_write(ControlVm_channel, |
| 379 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 380 | ToolAction), |
| 381 | &toolAction, sizeof(U8)) < 0) |
| 382 | return -EFAULT; |
| 383 | else |
| 384 | return count; |
| 385 | } else |
| 386 | return -EIO; |
| 387 | } |
| 388 | |
| 389 | ssize_t boottotool_show(struct device *dev, struct device_attribute *attr, |
| 390 | char *buf) |
| 391 | { |
| 392 | ULTRA_EFI_SPAR_INDICATION efiSparIndication; |
| 393 | |
| 394 | visorchannel_read(ControlVm_channel, |
| 395 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 396 | EfiSparIndication), &efiSparIndication, |
| 397 | sizeof(ULTRA_EFI_SPAR_INDICATION)); |
| 398 | return scnprintf(buf, PAGE_SIZE, "%u\n", |
| 399 | efiSparIndication.BootToTool); |
| 400 | } |
| 401 | |
| 402 | ssize_t boottotool_store(struct device *dev, struct device_attribute *attr, |
| 403 | const char *buf, size_t count) |
| 404 | { |
| 405 | int val; |
| 406 | ULTRA_EFI_SPAR_INDICATION efiSparIndication; |
| 407 | |
| 408 | if (sscanf(buf, "%u\n", &val) == 1) { |
| 409 | efiSparIndication.BootToTool = val; |
| 410 | if (visorchannel_write(ControlVm_channel, |
| 411 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 412 | EfiSparIndication), |
| 413 | &(efiSparIndication), |
| 414 | sizeof(ULTRA_EFI_SPAR_INDICATION)) < 0) |
| 415 | return -EFAULT; |
| 416 | else |
| 417 | return count; |
| 418 | } else |
| 419 | return -EIO; |
| 420 | } |
| 421 | |
| 422 | static ssize_t error_show(struct device *dev, struct device_attribute *attr, |
| 423 | char *buf) |
| 424 | { |
| 425 | u32 error; |
| 426 | |
| 427 | visorchannel_read(ControlVm_channel, offsetof( |
| 428 | ULTRA_CONTROLVM_CHANNEL_PROTOCOL, InstallationError), |
| 429 | &error, sizeof(u32)); |
| 430 | return scnprintf(buf, PAGE_SIZE, "%i\n", error); |
| 431 | } |
| 432 | |
| 433 | static ssize_t error_store(struct device *dev, struct device_attribute *attr, |
| 434 | const char *buf, size_t count) |
| 435 | { |
| 436 | u32 error; |
| 437 | |
| 438 | if (sscanf(buf, "%i\n", &error) == 1) { |
| 439 | if (visorchannel_write(ControlVm_channel, |
| 440 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 441 | InstallationError), |
| 442 | &error, sizeof(u32)) == 1) { |
| 443 | return count; |
| 444 | } |
| 445 | } |
| 446 | return -EIO; |
| 447 | } |
| 448 | |
| 449 | static ssize_t textid_show(struct device *dev, struct device_attribute *attr, |
| 450 | char *buf) |
| 451 | { |
| 452 | u32 textId; |
| 453 | |
| 454 | visorchannel_read(ControlVm_channel, offsetof( |
| 455 | ULTRA_CONTROLVM_CHANNEL_PROTOCOL, InstallationTextId), |
| 456 | &textId, sizeof(u32)); |
| 457 | return scnprintf(buf, PAGE_SIZE, "%i\n", textId); |
| 458 | } |
| 459 | |
| 460 | static ssize_t textid_store(struct device *dev, struct device_attribute *attr, |
| 461 | const char *buf, size_t count) |
| 462 | { |
| 463 | u32 textId; |
| 464 | |
| 465 | if (sscanf(buf, "%i\n", &textId) == 1) { |
| 466 | if (visorchannel_write(ControlVm_channel, |
| 467 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 468 | InstallationTextId), |
| 469 | &textId, sizeof(u32)) == 1) { |
| 470 | return count; |
| 471 | } |
| 472 | } |
| 473 | return -EIO; |
| 474 | } |
| 475 | |
| 476 | |
| 477 | static ssize_t remaining_steps_show(struct device *dev, |
| 478 | struct device_attribute *attr, char *buf) |
| 479 | { |
| 480 | u16 remainingSteps; |
| 481 | |
| 482 | visorchannel_read(ControlVm_channel, |
| 483 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 484 | InstallationRemainingSteps), |
| 485 | &remainingSteps, |
| 486 | sizeof(u16)); |
| 487 | return scnprintf(buf, PAGE_SIZE, "%hu\n", remainingSteps); |
| 488 | } |
| 489 | |
| 490 | static ssize_t remaining_steps_store(struct device *dev, |
| 491 | struct device_attribute *attr, const char *buf, size_t count) |
| 492 | { |
| 493 | u16 remainingSteps; |
| 494 | |
| 495 | if (sscanf(buf, "%hu\n", &remainingSteps) == 1) { |
| 496 | if (visorchannel_write(ControlVm_channel, |
| 497 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 498 | InstallationRemainingSteps), |
| 499 | &remainingSteps, sizeof(u16)) == 1) { |
| 500 | return count; |
| 501 | } |
| 502 | } |
| 503 | return -EIO; |
| 504 | } |
| 505 | |
| 506 | static void |
| 507 | show_partition_property(struct seq_file *f, void *ctx, int property) |
| 508 | { |
| 509 | VISORCHIPSET_BUS_INFO *info = (VISORCHIPSET_BUS_INFO *) (ctx); |
| 510 | |
| 511 | switch (property) { |
| 512 | case PARTPROP_name: |
| 513 | seq_printf(f, "%s\n", NONULLSTR(info->name)); |
| 514 | break; |
| 515 | case PARTPROP_description: |
| 516 | seq_printf(f, "%s\n", NONULLSTR(info->description)); |
| 517 | break; |
| 518 | case PARTPROP_handle: |
| 519 | seq_printf(f, "0x%-16.16Lx\n", info->partitionHandle); |
| 520 | break; |
| 521 | case PARTPROP_busNumber: |
| 522 | seq_printf(f, "%d\n", info->busNo); |
| 523 | break; |
| 524 | default: |
| 525 | seq_printf(f, "(%d??)\n", property); |
| 526 | break; |
| 527 | } |
| 528 | } |
| 529 | |
| 530 | static void |
| 531 | proc_Init(void) |
| 532 | { |
| 533 | if (ProcDir == NULL) { |
| 534 | ProcDir = proc_mkdir(MYDRVNAME, NULL); |
| 535 | if (ProcDir == NULL) { |
| 536 | LOGERR("failed to create /proc directory %s", |
| 537 | MYDRVNAME); |
| 538 | POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, |
| 539 | POSTCODE_SEVERITY_ERR); |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | static void |
| 545 | proc_DeInit(void) |
| 546 | { |
| 547 | if (ProcDir != NULL) |
| 548 | remove_proc_entry(MYDRVNAME, NULL); |
| 549 | ProcDir = NULL; |
| 550 | } |
| 551 | |
| 552 | #if 0 |
| 553 | static void |
| 554 | testUnicode(void) |
| 555 | { |
| 556 | wchar_t unicodeString[] = { 'a', 'b', 'c', 0 }; |
| 557 | char s[sizeof(unicodeString) * NLS_MAX_CHARSET_SIZE]; |
| 558 | wchar_t unicode2[99]; |
| 559 | |
| 560 | /* NOTE: Either due to a bug, or feature I don't understand, the |
| 561 | * kernel utf8_mbstowcs() and utf_wcstombs() do NOT copy the |
| 562 | * trailed NUL byte!! REALLY!!!!! Arrrrgggghhhhh |
| 563 | */ |
| 564 | |
| 565 | LOGINF("sizeof(wchar_t) = %d", sizeof(wchar_t)); |
| 566 | LOGINF("utf8_wcstombs=%d", |
| 567 | chrs = utf8_wcstombs(s, unicodeString, sizeof(s))); |
| 568 | if (chrs >= 0) |
| 569 | s[chrs] = '\0'; /* GRRRRRRRR */ |
| 570 | LOGINF("s='%s'", s); |
| 571 | LOGINF("utf8_mbstowcs=%d", chrs = utf8_mbstowcs(unicode2, s, 100)); |
| 572 | if (chrs >= 0) |
| 573 | unicode2[chrs] = 0; /* GRRRRRRRR */ |
| 574 | if (memcmp(unicodeString, unicode2, sizeof(unicodeString)) == 0) |
| 575 | LOGINF("strings match... good"); |
| 576 | else |
| 577 | LOGINF("strings did not match!!"); |
| 578 | } |
| 579 | #endif |
| 580 | |
| 581 | static void |
| 582 | busInfo_clear(void *v) |
| 583 | { |
| 584 | VISORCHIPSET_BUS_INFO *p = (VISORCHIPSET_BUS_INFO *) (v); |
| 585 | |
| 586 | if (p->procObject) { |
| 587 | visor_proc_DestroyObject(p->procObject); |
| 588 | p->procObject = NULL; |
| 589 | } |
| 590 | kfree(p->name); |
| 591 | p->name = NULL; |
| 592 | |
| 593 | kfree(p->description); |
| 594 | p->description = NULL; |
| 595 | |
| 596 | p->state.created = 0; |
| 597 | memset(p, 0, sizeof(VISORCHIPSET_BUS_INFO)); |
| 598 | } |
| 599 | |
| 600 | static void |
| 601 | devInfo_clear(void *v) |
| 602 | { |
| 603 | VISORCHIPSET_DEVICE_INFO *p = (VISORCHIPSET_DEVICE_INFO *) (v); |
| 604 | p->state.created = 0; |
| 605 | memset(p, 0, sizeof(VISORCHIPSET_DEVICE_INFO)); |
| 606 | } |
| 607 | |
| 608 | static U8 |
| 609 | check_chipset_events(void) |
| 610 | { |
| 611 | int i; |
| 612 | U8 send_msg = 1; |
| 613 | /* Check events to determine if response should be sent */ |
| 614 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) |
| 615 | send_msg &= chipset_events[i]; |
| 616 | return send_msg; |
| 617 | } |
| 618 | |
| 619 | static void |
| 620 | clear_chipset_events(void) |
| 621 | { |
| 622 | int i; |
| 623 | /* Clear chipset_events */ |
| 624 | for (i = 0; i < MAX_CHIPSET_EVENTS; i++) |
| 625 | chipset_events[i] = 0; |
| 626 | } |
| 627 | |
| 628 | void |
| 629 | visorchipset_register_busdev_server(VISORCHIPSET_BUSDEV_NOTIFIERS *notifiers, |
| 630 | VISORCHIPSET_BUSDEV_RESPONDERS *responders, |
| 631 | ULTRA_VBUS_DEVICEINFO *driverInfo) |
| 632 | { |
| 633 | LOCKSEM_UNINTERRUPTIBLE(&NotifierLock); |
| 634 | if (notifiers == NULL) { |
| 635 | memset(&BusDev_Server_Notifiers, 0, |
| 636 | sizeof(BusDev_Server_Notifiers)); |
| 637 | serverregistered = 0; /* clear flag */ |
| 638 | } else { |
| 639 | BusDev_Server_Notifiers = *notifiers; |
| 640 | serverregistered = 1; /* set flag */ |
| 641 | } |
| 642 | if (responders) |
| 643 | *responders = BusDev_Responders; |
| 644 | if (driverInfo) |
| 645 | BusDeviceInfo_Init(driverInfo, "chipset", "visorchipset", |
| 646 | VERSION, NULL); |
| 647 | |
| 648 | UNLOCKSEM(&NotifierLock); |
| 649 | } |
| 650 | EXPORT_SYMBOL_GPL(visorchipset_register_busdev_server); |
| 651 | |
| 652 | void |
| 653 | visorchipset_register_busdev_client(VISORCHIPSET_BUSDEV_NOTIFIERS *notifiers, |
| 654 | VISORCHIPSET_BUSDEV_RESPONDERS *responders, |
| 655 | ULTRA_VBUS_DEVICEINFO *driverInfo) |
| 656 | { |
| 657 | LOCKSEM_UNINTERRUPTIBLE(&NotifierLock); |
| 658 | if (notifiers == NULL) { |
| 659 | memset(&BusDev_Client_Notifiers, 0, |
| 660 | sizeof(BusDev_Client_Notifiers)); |
| 661 | clientregistered = 0; /* clear flag */ |
| 662 | } else { |
| 663 | BusDev_Client_Notifiers = *notifiers; |
| 664 | clientregistered = 1; /* set flag */ |
| 665 | } |
| 666 | if (responders) |
| 667 | *responders = BusDev_Responders; |
| 668 | if (driverInfo) |
| 669 | BusDeviceInfo_Init(driverInfo, "chipset(bolts)", "visorchipset", |
| 670 | VERSION, NULL); |
| 671 | UNLOCKSEM(&NotifierLock); |
| 672 | } |
| 673 | EXPORT_SYMBOL_GPL(visorchipset_register_busdev_client); |
| 674 | |
| 675 | static void |
| 676 | cleanup_controlvm_structures(void) |
| 677 | { |
| 678 | VISORCHIPSET_BUS_INFO *bi, *tmp_bi; |
| 679 | VISORCHIPSET_DEVICE_INFO *di, *tmp_di; |
| 680 | |
| 681 | list_for_each_entry_safe(bi, tmp_bi, &BusInfoList, entry) { |
| 682 | busInfo_clear(bi); |
| 683 | list_del(&bi->entry); |
| 684 | kfree(bi); |
| 685 | } |
| 686 | |
| 687 | list_for_each_entry_safe(di, tmp_di, &DevInfoList, entry) { |
| 688 | devInfo_clear(di); |
| 689 | list_del(&di->entry); |
| 690 | kfree(di); |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | static void |
| 695 | chipset_init(CONTROLVM_MESSAGE *inmsg) |
| 696 | { |
| 697 | static int chipset_inited; |
| 698 | ULTRA_CHIPSET_FEATURE features = 0; |
| 699 | int rc = CONTROLVM_RESP_SUCCESS; |
| 700 | |
| 701 | POSTCODE_LINUX_2(CHIPSET_INIT_ENTRY_PC, POSTCODE_SEVERITY_INFO); |
| 702 | if (chipset_inited) { |
| 703 | LOGERR("CONTROLVM_CHIPSET_INIT Failed: Already Done."); |
| 704 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
| 705 | goto Away; |
| 706 | } |
| 707 | chipset_inited = 1; |
| 708 | POSTCODE_LINUX_2(CHIPSET_INIT_EXIT_PC, POSTCODE_SEVERITY_INFO); |
| 709 | |
| 710 | /* Set features to indicate we support parahotplug (if Command |
| 711 | * also supports it). */ |
| 712 | features = |
| 713 | inmsg->cmd.initChipset. |
| 714 | features & ULTRA_CHIPSET_FEATURE_PARA_HOTPLUG; |
| 715 | |
| 716 | /* Set the "reply" bit so Command knows this is a |
| 717 | * features-aware driver. */ |
| 718 | features |= ULTRA_CHIPSET_FEATURE_REPLY; |
| 719 | |
| 720 | Away: |
| 721 | if (rc < 0) |
| 722 | cleanup_controlvm_structures(); |
| 723 | if (inmsg->hdr.Flags.responseExpected) |
| 724 | controlvm_respond_chipset_init(&inmsg->hdr, rc, features); |
| 725 | } |
| 726 | |
| 727 | static void |
| 728 | controlvm_init_response(CONTROLVM_MESSAGE *msg, |
| 729 | CONTROLVM_MESSAGE_HEADER *msgHdr, int response) |
| 730 | { |
| 731 | memset(msg, 0, sizeof(CONTROLVM_MESSAGE)); |
| 732 | memcpy(&msg->hdr, msgHdr, sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 733 | msg->hdr.PayloadBytes = 0; |
| 734 | msg->hdr.PayloadVmOffset = 0; |
| 735 | msg->hdr.PayloadMaxBytes = 0; |
| 736 | if (response < 0) { |
| 737 | msg->hdr.Flags.failed = 1; |
| 738 | msg->hdr.CompletionStatus = (U32) (-response); |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | static void |
| 743 | controlvm_respond(CONTROLVM_MESSAGE_HEADER *msgHdr, int response) |
| 744 | { |
| 745 | CONTROLVM_MESSAGE outmsg; |
| 746 | controlvm_init_response(&outmsg, msgHdr, response); |
| 747 | /* For DiagPool channel DEVICE_CHANGESTATE, we need to send |
| 748 | * back the deviceChangeState structure in the packet. */ |
| 749 | if (msgHdr->Id == CONTROLVM_DEVICE_CHANGESTATE |
| 750 | && g_DeviceChangeStatePacket.deviceChangeState.busNo == |
| 751 | g_diagpoolBusNo |
| 752 | && g_DeviceChangeStatePacket.deviceChangeState.devNo == |
| 753 | g_diagpoolDevNo) |
| 754 | outmsg.cmd = g_DeviceChangeStatePacket; |
| 755 | if (outmsg.hdr.Flags.testMessage == 1) { |
| 756 | LOGINF("%s controlvm_msg=0x%x response=%d for test message", |
| 757 | __func__, outmsg.hdr.Id, response); |
| 758 | return; |
| 759 | } |
| 760 | if (!visorchannel_signalinsert(ControlVm_channel, |
| 761 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
| 762 | LOGERR("signalinsert failed!"); |
| 763 | return; |
| 764 | } |
| 765 | } |
| 766 | |
| 767 | static void |
| 768 | controlvm_respond_chipset_init(CONTROLVM_MESSAGE_HEADER *msgHdr, int response, |
| 769 | ULTRA_CHIPSET_FEATURE features) |
| 770 | { |
| 771 | CONTROLVM_MESSAGE outmsg; |
| 772 | controlvm_init_response(&outmsg, msgHdr, response); |
| 773 | outmsg.cmd.initChipset.features = features; |
| 774 | if (!visorchannel_signalinsert(ControlVm_channel, |
| 775 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
| 776 | LOGERR("signalinsert failed!"); |
| 777 | return; |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | static void |
| 782 | controlvm_respond_physdev_changestate(CONTROLVM_MESSAGE_HEADER *msgHdr, |
| 783 | int response, ULTRA_SEGMENT_STATE state) |
| 784 | { |
| 785 | CONTROLVM_MESSAGE outmsg; |
| 786 | controlvm_init_response(&outmsg, msgHdr, response); |
| 787 | outmsg.cmd.deviceChangeState.state = state; |
| 788 | outmsg.cmd.deviceChangeState.flags.physicalDevice = 1; |
| 789 | if (!visorchannel_signalinsert(ControlVm_channel, |
| 790 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
| 791 | LOGERR("signalinsert failed!"); |
| 792 | return; |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | void |
| 797 | visorchipset_save_message(CONTROLVM_MESSAGE *msg, CRASH_OBJ_TYPE type) |
| 798 | { |
| 799 | U32 localSavedCrashMsgOffset; |
| 800 | U16 localSavedCrashMsgCount; |
| 801 | |
| 802 | /* get saved message count */ |
| 803 | if (visorchannel_read(ControlVm_channel, |
| 804 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 805 | SavedCrashMsgCount), |
| 806 | &localSavedCrashMsgCount, sizeof(U16)) < 0) { |
| 807 | LOGERR("failed to get Saved Message Count"); |
| 808 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
| 809 | POSTCODE_SEVERITY_ERR); |
| 810 | return; |
| 811 | } |
| 812 | |
| 813 | if (localSavedCrashMsgCount != CONTROLVM_CRASHMSG_MAX) { |
| 814 | LOGERR("Saved Message Count incorrect %d", |
| 815 | localSavedCrashMsgCount); |
| 816 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
| 817 | localSavedCrashMsgCount, |
| 818 | POSTCODE_SEVERITY_ERR); |
| 819 | return; |
| 820 | } |
| 821 | |
| 822 | /* get saved crash message offset */ |
| 823 | if (visorchannel_read(ControlVm_channel, |
| 824 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 825 | SavedCrashMsgOffset), |
| 826 | &localSavedCrashMsgOffset, sizeof(U32)) < 0) { |
| 827 | LOGERR("failed to get Saved Message Offset"); |
| 828 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
| 829 | POSTCODE_SEVERITY_ERR); |
| 830 | return; |
| 831 | } |
| 832 | |
| 833 | if (type == CRASH_bus) { |
| 834 | if (visorchannel_write(ControlVm_channel, |
| 835 | localSavedCrashMsgOffset, |
| 836 | msg, sizeof(CONTROLVM_MESSAGE)) < 0) { |
| 837 | LOGERR("SAVE_MSG_BUS_FAILURE: Failed to write CrashCreateBusMsg!"); |
| 838 | POSTCODE_LINUX_2(SAVE_MSG_BUS_FAILURE_PC, |
| 839 | POSTCODE_SEVERITY_ERR); |
| 840 | return; |
| 841 | } |
| 842 | } else { |
| 843 | if (visorchannel_write(ControlVm_channel, |
| 844 | localSavedCrashMsgOffset + |
| 845 | sizeof(CONTROLVM_MESSAGE), msg, |
| 846 | sizeof(CONTROLVM_MESSAGE)) < 0) { |
| 847 | LOGERR("SAVE_MSG_DEV_FAILURE: Failed to write CrashCreateDevMsg!"); |
| 848 | POSTCODE_LINUX_2(SAVE_MSG_DEV_FAILURE_PC, |
| 849 | POSTCODE_SEVERITY_ERR); |
| 850 | return; |
| 851 | } |
| 852 | } |
| 853 | } |
| 854 | EXPORT_SYMBOL_GPL(visorchipset_save_message); |
| 855 | |
| 856 | static void |
| 857 | bus_responder(CONTROLVM_ID cmdId, ulong busNo, int response) |
| 858 | { |
| 859 | VISORCHIPSET_BUS_INFO *p = NULL; |
| 860 | BOOL need_clear = FALSE; |
| 861 | |
| 862 | p = findbus(&BusInfoList, busNo); |
| 863 | if (!p) { |
| 864 | LOGERR("internal error busNo=%lu", busNo); |
| 865 | return; |
| 866 | } |
| 867 | if (response < 0) { |
| 868 | if ((cmdId == CONTROLVM_BUS_CREATE) && |
| 869 | (response != (-CONTROLVM_RESP_ERROR_ALREADY_DONE))) |
| 870 | /* undo the row we just created... */ |
| 871 | delbusdevices(&DevInfoList, busNo); |
| 872 | } else { |
| 873 | if (cmdId == CONTROLVM_BUS_CREATE) |
| 874 | p->state.created = 1; |
| 875 | if (cmdId == CONTROLVM_BUS_DESTROY) |
| 876 | need_clear = TRUE; |
| 877 | } |
| 878 | |
| 879 | if (p->pendingMsgHdr.Id == CONTROLVM_INVALID) { |
| 880 | LOGERR("bus_responder no pending msg"); |
| 881 | return; /* no controlvm response needed */ |
| 882 | } |
| 883 | if (p->pendingMsgHdr.Id != (U32) cmdId) { |
| 884 | LOGERR("expected=%d, found=%d", cmdId, p->pendingMsgHdr.Id); |
| 885 | return; |
| 886 | } |
| 887 | controlvm_respond(&p->pendingMsgHdr, response); |
| 888 | p->pendingMsgHdr.Id = CONTROLVM_INVALID; |
| 889 | if (need_clear) { |
| 890 | busInfo_clear(p); |
| 891 | delbusdevices(&DevInfoList, busNo); |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | static void |
| 896 | device_changestate_responder(CONTROLVM_ID cmdId, |
| 897 | ulong busNo, ulong devNo, int response, |
| 898 | ULTRA_SEGMENT_STATE responseState) |
| 899 | { |
| 900 | VISORCHIPSET_DEVICE_INFO *p = NULL; |
| 901 | CONTROLVM_MESSAGE outmsg; |
| 902 | |
| 903 | p = finddevice(&DevInfoList, busNo, devNo); |
| 904 | if (!p) { |
| 905 | LOGERR("internal error; busNo=%lu, devNo=%lu", busNo, devNo); |
| 906 | return; |
| 907 | } |
| 908 | if (p->pendingMsgHdr.Id == CONTROLVM_INVALID) { |
| 909 | LOGERR("device_responder no pending msg"); |
| 910 | return; /* no controlvm response needed */ |
| 911 | } |
| 912 | if (p->pendingMsgHdr.Id != cmdId) { |
| 913 | LOGERR("expected=%d, found=%d", cmdId, p->pendingMsgHdr.Id); |
| 914 | return; |
| 915 | } |
| 916 | |
| 917 | controlvm_init_response(&outmsg, &p->pendingMsgHdr, response); |
| 918 | |
| 919 | outmsg.cmd.deviceChangeState.busNo = busNo; |
| 920 | outmsg.cmd.deviceChangeState.devNo = devNo; |
| 921 | outmsg.cmd.deviceChangeState.state = responseState; |
| 922 | |
| 923 | if (!visorchannel_signalinsert(ControlVm_channel, |
| 924 | CONTROLVM_QUEUE_REQUEST, &outmsg)) { |
| 925 | LOGERR("signalinsert failed!"); |
| 926 | return; |
| 927 | } |
| 928 | |
| 929 | p->pendingMsgHdr.Id = CONTROLVM_INVALID; |
| 930 | } |
| 931 | |
| 932 | static void |
| 933 | device_responder(CONTROLVM_ID cmdId, ulong busNo, ulong devNo, int response) |
| 934 | { |
| 935 | VISORCHIPSET_DEVICE_INFO *p = NULL; |
| 936 | BOOL need_clear = FALSE; |
| 937 | |
| 938 | p = finddevice(&DevInfoList, busNo, devNo); |
| 939 | if (!p) { |
| 940 | LOGERR("internal error; busNo=%lu, devNo=%lu", busNo, devNo); |
| 941 | return; |
| 942 | } |
| 943 | if (response >= 0) { |
| 944 | if (cmdId == CONTROLVM_DEVICE_CREATE) |
| 945 | p->state.created = 1; |
| 946 | if (cmdId == CONTROLVM_DEVICE_DESTROY) |
| 947 | need_clear = TRUE; |
| 948 | } |
| 949 | |
| 950 | if (p->pendingMsgHdr.Id == CONTROLVM_INVALID) { |
| 951 | LOGERR("device_responder no pending msg"); |
| 952 | return; /* no controlvm response needed */ |
| 953 | } |
| 954 | if (p->pendingMsgHdr.Id != (U32) cmdId) { |
| 955 | LOGERR("expected=%d, found=%d", cmdId, p->pendingMsgHdr.Id); |
| 956 | return; |
| 957 | } |
| 958 | controlvm_respond(&p->pendingMsgHdr, response); |
| 959 | p->pendingMsgHdr.Id = CONTROLVM_INVALID; |
| 960 | if (need_clear) |
| 961 | devInfo_clear(p); |
| 962 | } |
| 963 | |
| 964 | static void |
| 965 | bus_epilog(U32 busNo, |
| 966 | U32 cmd, CONTROLVM_MESSAGE_HEADER *msgHdr, |
| 967 | int response, BOOL needResponse) |
| 968 | { |
| 969 | BOOL notified = FALSE; |
| 970 | |
| 971 | VISORCHIPSET_BUS_INFO *pBusInfo = findbus(&BusInfoList, busNo); |
| 972 | |
| 973 | if (!pBusInfo) { |
| 974 | LOGERR("HUH? bad busNo=%d", busNo); |
| 975 | return; |
| 976 | } |
| 977 | if (needResponse) { |
| 978 | memcpy(&pBusInfo->pendingMsgHdr, msgHdr, |
| 979 | sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 980 | } else |
| 981 | pBusInfo->pendingMsgHdr.Id = CONTROLVM_INVALID; |
| 982 | |
| 983 | LOCKSEM_UNINTERRUPTIBLE(&NotifierLock); |
| 984 | if (response == CONTROLVM_RESP_SUCCESS) { |
| 985 | switch (cmd) { |
| 986 | case CONTROLVM_BUS_CREATE: |
| 987 | /* We can't tell from the bus_create |
| 988 | * information which of our 2 bus flavors the |
| 989 | * devices on this bus will ultimately end up. |
| 990 | * FORTUNATELY, it turns out it is harmless to |
| 991 | * send the bus_create to both of them. We can |
| 992 | * narrow things down a little bit, though, |
| 993 | * because we know: - BusDev_Server can handle |
| 994 | * either server or client devices |
| 995 | * - BusDev_Client can handle ONLY client |
| 996 | * devices */ |
| 997 | if (BusDev_Server_Notifiers.bus_create) { |
| 998 | (*BusDev_Server_Notifiers.bus_create) (busNo); |
| 999 | notified = TRUE; |
| 1000 | } |
| 1001 | if ((!pBusInfo->flags.server) /*client */ && |
| 1002 | BusDev_Client_Notifiers.bus_create) { |
| 1003 | (*BusDev_Client_Notifiers.bus_create) (busNo); |
| 1004 | notified = TRUE; |
| 1005 | } |
| 1006 | break; |
| 1007 | case CONTROLVM_BUS_DESTROY: |
| 1008 | if (BusDev_Server_Notifiers.bus_destroy) { |
| 1009 | (*BusDev_Server_Notifiers.bus_destroy) (busNo); |
| 1010 | notified = TRUE; |
| 1011 | } |
| 1012 | if ((!pBusInfo->flags.server) /*client */ && |
| 1013 | BusDev_Client_Notifiers.bus_destroy) { |
| 1014 | (*BusDev_Client_Notifiers.bus_destroy) (busNo); |
| 1015 | notified = TRUE; |
| 1016 | } |
| 1017 | break; |
| 1018 | } |
| 1019 | } |
| 1020 | if (notified) |
| 1021 | /* The callback function just called above is responsible |
| 1022 | * for calling the appropriate VISORCHIPSET_BUSDEV_RESPONDERS |
| 1023 | * function, which will call bus_responder() |
| 1024 | */ |
| 1025 | ; |
| 1026 | else |
| 1027 | bus_responder(cmd, busNo, response); |
| 1028 | UNLOCKSEM(&NotifierLock); |
| 1029 | } |
| 1030 | |
| 1031 | static void |
| 1032 | device_epilog(U32 busNo, U32 devNo, ULTRA_SEGMENT_STATE state, U32 cmd, |
| 1033 | CONTROLVM_MESSAGE_HEADER *msgHdr, int response, |
| 1034 | BOOL needResponse, BOOL for_visorbus) |
| 1035 | { |
| 1036 | VISORCHIPSET_BUSDEV_NOTIFIERS *notifiers = NULL; |
| 1037 | BOOL notified = FALSE; |
| 1038 | |
| 1039 | VISORCHIPSET_DEVICE_INFO *pDevInfo = |
| 1040 | finddevice(&DevInfoList, busNo, devNo); |
| 1041 | char *envp[] = { |
| 1042 | "SPARSP_DIAGPOOL_PAUSED_STATE = 1", |
| 1043 | NULL |
| 1044 | }; |
| 1045 | |
| 1046 | if (!pDevInfo) { |
| 1047 | LOGERR("HUH? bad busNo=%d, devNo=%d", busNo, devNo); |
| 1048 | return; |
| 1049 | } |
| 1050 | if (for_visorbus) |
| 1051 | notifiers = &BusDev_Server_Notifiers; |
| 1052 | else |
| 1053 | notifiers = &BusDev_Client_Notifiers; |
| 1054 | if (needResponse) { |
| 1055 | memcpy(&pDevInfo->pendingMsgHdr, msgHdr, |
| 1056 | sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 1057 | } else |
| 1058 | pDevInfo->pendingMsgHdr.Id = CONTROLVM_INVALID; |
| 1059 | |
| 1060 | LOCKSEM_UNINTERRUPTIBLE(&NotifierLock); |
| 1061 | if (response >= 0) { |
| 1062 | switch (cmd) { |
| 1063 | case CONTROLVM_DEVICE_CREATE: |
| 1064 | if (notifiers->device_create) { |
| 1065 | (*notifiers->device_create) (busNo, devNo); |
| 1066 | notified = TRUE; |
| 1067 | } |
| 1068 | break; |
| 1069 | case CONTROLVM_DEVICE_CHANGESTATE: |
| 1070 | /* ServerReady / ServerRunning / SegmentStateRunning */ |
| 1071 | if (state.Alive == SegmentStateRunning.Alive && |
| 1072 | state.Operating == SegmentStateRunning.Operating) { |
| 1073 | if (notifiers->device_resume) { |
| 1074 | (*notifiers->device_resume) (busNo, |
| 1075 | devNo); |
| 1076 | notified = TRUE; |
| 1077 | } |
| 1078 | } |
| 1079 | /* ServerNotReady / ServerLost / SegmentStateStandby */ |
| 1080 | else if (state.Alive == SegmentStateStandby.Alive && |
| 1081 | state.Operating == |
| 1082 | SegmentStateStandby.Operating) { |
| 1083 | /* technically this is standby case |
| 1084 | * where server is lost |
| 1085 | */ |
| 1086 | if (notifiers->device_pause) { |
| 1087 | (*notifiers->device_pause) (busNo, |
| 1088 | devNo); |
| 1089 | notified = TRUE; |
| 1090 | } |
| 1091 | } else if (state.Alive == SegmentStatePaused.Alive && |
| 1092 | state.Operating == |
| 1093 | SegmentStatePaused.Operating) { |
| 1094 | /* this is lite pause where channel is |
| 1095 | * still valid just 'pause' of it |
| 1096 | */ |
| 1097 | if (busNo == g_diagpoolBusNo |
| 1098 | && devNo == g_diagpoolDevNo) { |
| 1099 | LOGINF("DEVICE_CHANGESTATE(DiagpoolChannel busNo=%d devNo=%d is pausing...)", |
| 1100 | busNo, devNo); |
| 1101 | /* this will trigger the |
| 1102 | * diag_shutdown.sh script in |
| 1103 | * the visorchipset hotplug */ |
| 1104 | kobject_uevent_env |
| 1105 | (&Visorchipset_platform_device.dev. |
| 1106 | kobj, KOBJ_ONLINE, envp); |
| 1107 | } |
| 1108 | } |
| 1109 | break; |
| 1110 | case CONTROLVM_DEVICE_DESTROY: |
| 1111 | if (notifiers->device_destroy) { |
| 1112 | (*notifiers->device_destroy) (busNo, devNo); |
| 1113 | notified = TRUE; |
| 1114 | } |
| 1115 | break; |
| 1116 | } |
| 1117 | } |
| 1118 | if (notified) |
| 1119 | /* The callback function just called above is responsible |
| 1120 | * for calling the appropriate VISORCHIPSET_BUSDEV_RESPONDERS |
| 1121 | * function, which will call device_responder() |
| 1122 | */ |
| 1123 | ; |
| 1124 | else |
| 1125 | device_responder(cmd, busNo, devNo, response); |
| 1126 | UNLOCKSEM(&NotifierLock); |
| 1127 | } |
| 1128 | |
| 1129 | static void |
| 1130 | bus_create(CONTROLVM_MESSAGE *inmsg) |
| 1131 | { |
| 1132 | CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd; |
| 1133 | ulong busNo = cmd->createBus.busNo; |
| 1134 | int rc = CONTROLVM_RESP_SUCCESS; |
| 1135 | VISORCHIPSET_BUS_INFO *pBusInfo = NULL; |
| 1136 | |
| 1137 | |
| 1138 | pBusInfo = findbus(&BusInfoList, busNo); |
| 1139 | if (pBusInfo && (pBusInfo->state.created == 1)) { |
| 1140 | LOGERR("CONTROLVM_BUS_CREATE Failed: bus %lu already exists", |
| 1141 | busNo); |
| 1142 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, busNo, |
| 1143 | POSTCODE_SEVERITY_ERR); |
| 1144 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
| 1145 | goto Away; |
| 1146 | } |
| 1147 | pBusInfo = kzalloc(sizeof(VISORCHIPSET_BUS_INFO), GFP_KERNEL); |
| 1148 | if (pBusInfo == NULL) { |
| 1149 | LOGERR("CONTROLVM_BUS_CREATE Failed: bus %lu kzalloc failed", |
| 1150 | busNo); |
| 1151 | POSTCODE_LINUX_3(BUS_CREATE_FAILURE_PC, busNo, |
| 1152 | POSTCODE_SEVERITY_ERR); |
| 1153 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
| 1154 | goto Away; |
| 1155 | } |
| 1156 | |
| 1157 | INIT_LIST_HEAD(&pBusInfo->entry); |
| 1158 | pBusInfo->busNo = busNo; |
| 1159 | pBusInfo->devNo = cmd->createBus.deviceCount; |
| 1160 | |
| 1161 | POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, busNo, POSTCODE_SEVERITY_INFO); |
| 1162 | |
| 1163 | if (inmsg->hdr.Flags.testMessage == 1) |
| 1164 | pBusInfo->chanInfo.addrType = ADDRTYPE_localTest; |
| 1165 | else |
| 1166 | pBusInfo->chanInfo.addrType = ADDRTYPE_localPhysical; |
| 1167 | |
| 1168 | pBusInfo->flags.server = inmsg->hdr.Flags.server; |
| 1169 | pBusInfo->chanInfo.channelAddr = cmd->createBus.channelAddr; |
| 1170 | pBusInfo->chanInfo.nChannelBytes = cmd->createBus.channelBytes; |
| 1171 | pBusInfo->chanInfo.channelTypeGuid = cmd->createBus.busDataTypeGuid; |
| 1172 | pBusInfo->chanInfo.channelInstGuid = cmd->createBus.busInstGuid; |
| 1173 | |
| 1174 | list_add(&pBusInfo->entry, &BusInfoList); |
| 1175 | |
| 1176 | POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, busNo, POSTCODE_SEVERITY_INFO); |
| 1177 | |
| 1178 | Away: |
| 1179 | bus_epilog(busNo, CONTROLVM_BUS_CREATE, &inmsg->hdr, |
| 1180 | rc, inmsg->hdr.Flags.responseExpected == 1); |
| 1181 | } |
| 1182 | |
| 1183 | static void |
| 1184 | bus_destroy(CONTROLVM_MESSAGE *inmsg) |
| 1185 | { |
| 1186 | CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd; |
| 1187 | ulong busNo = cmd->destroyBus.busNo; |
| 1188 | VISORCHIPSET_BUS_INFO *pBusInfo; |
| 1189 | int rc = CONTROLVM_RESP_SUCCESS; |
| 1190 | |
| 1191 | pBusInfo = findbus(&BusInfoList, busNo); |
| 1192 | if (!pBusInfo) { |
| 1193 | LOGERR("CONTROLVM_BUS_DESTROY Failed: bus %lu invalid", busNo); |
| 1194 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
| 1195 | goto Away; |
| 1196 | } |
| 1197 | if (pBusInfo->state.created == 0) { |
| 1198 | LOGERR("CONTROLVM_BUS_DESTROY Failed: bus %lu already destroyed", |
| 1199 | busNo); |
| 1200 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
| 1201 | goto Away; |
| 1202 | } |
| 1203 | |
| 1204 | Away: |
| 1205 | bus_epilog(busNo, CONTROLVM_BUS_DESTROY, &inmsg->hdr, |
| 1206 | rc, inmsg->hdr.Flags.responseExpected == 1); |
| 1207 | } |
| 1208 | |
| 1209 | static void |
| 1210 | bus_configure(CONTROLVM_MESSAGE *inmsg, PARSER_CONTEXT *parser_ctx) |
| 1211 | { |
| 1212 | CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd; |
| 1213 | ulong busNo = cmd->configureBus.busNo; |
| 1214 | VISORCHIPSET_BUS_INFO *pBusInfo = NULL; |
| 1215 | int rc = CONTROLVM_RESP_SUCCESS; |
| 1216 | char s[99]; |
| 1217 | |
| 1218 | busNo = cmd->configureBus.busNo; |
| 1219 | POSTCODE_LINUX_3(BUS_CONFIGURE_ENTRY_PC, busNo, POSTCODE_SEVERITY_INFO); |
| 1220 | |
| 1221 | pBusInfo = findbus(&BusInfoList, busNo); |
| 1222 | if (!pBusInfo) { |
| 1223 | LOGERR("CONTROLVM_BUS_CONFIGURE Failed: bus %lu invalid", |
| 1224 | busNo); |
| 1225 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, busNo, |
| 1226 | POSTCODE_SEVERITY_ERR); |
| 1227 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
| 1228 | goto Away; |
| 1229 | } |
| 1230 | if (pBusInfo->state.created == 0) { |
| 1231 | LOGERR("CONTROLVM_BUS_CONFIGURE Failed: Invalid bus %lu - not created yet", |
| 1232 | busNo); |
| 1233 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, busNo, |
| 1234 | POSTCODE_SEVERITY_ERR); |
| 1235 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
| 1236 | goto Away; |
| 1237 | } |
| 1238 | /* TBD - add this check to other commands also... */ |
| 1239 | if (pBusInfo->pendingMsgHdr.Id != CONTROLVM_INVALID) { |
| 1240 | LOGERR("CONTROLVM_BUS_CONFIGURE Failed: bus %lu MsgId=%u outstanding", |
| 1241 | busNo, (uint) pBusInfo->pendingMsgHdr.Id); |
| 1242 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, busNo, |
| 1243 | POSTCODE_SEVERITY_ERR); |
| 1244 | rc = -CONTROLVM_RESP_ERROR_MESSAGE_ID_INVALID_FOR_CLIENT; |
| 1245 | goto Away; |
| 1246 | } |
| 1247 | |
| 1248 | pBusInfo->partitionHandle = cmd->configureBus.guestHandle; |
| 1249 | pBusInfo->partitionGuid = parser_id_get(parser_ctx); |
| 1250 | parser_param_start(parser_ctx, PARSERSTRING_NAME); |
| 1251 | pBusInfo->name = parser_string_get(parser_ctx); |
| 1252 | |
| 1253 | visorchannel_uuid_id(&pBusInfo->partitionGuid, s); |
| 1254 | pBusInfo->procObject = |
| 1255 | visor_proc_CreateObject(PartitionType, s, (void *) (pBusInfo)); |
| 1256 | if (pBusInfo->procObject == NULL) { |
| 1257 | LOGERR("CONTROLVM_BUS_CONFIGURE Failed: busNo=%lu failed to create /proc entry", |
| 1258 | busNo); |
| 1259 | POSTCODE_LINUX_3(BUS_CONFIGURE_FAILURE_PC, busNo, |
| 1260 | POSTCODE_SEVERITY_ERR); |
| 1261 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
| 1262 | goto Away; |
| 1263 | } |
| 1264 | POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, busNo, POSTCODE_SEVERITY_INFO); |
| 1265 | Away: |
| 1266 | bus_epilog(busNo, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr, |
| 1267 | rc, inmsg->hdr.Flags.responseExpected == 1); |
| 1268 | } |
| 1269 | |
| 1270 | static void |
| 1271 | my_device_create(CONTROLVM_MESSAGE *inmsg) |
| 1272 | { |
| 1273 | CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd; |
| 1274 | ulong busNo = cmd->createDevice.busNo; |
| 1275 | ulong devNo = cmd->createDevice.devNo; |
| 1276 | VISORCHIPSET_DEVICE_INFO *pDevInfo = NULL; |
| 1277 | VISORCHIPSET_BUS_INFO *pBusInfo = NULL; |
| 1278 | int rc = CONTROLVM_RESP_SUCCESS; |
| 1279 | |
| 1280 | pDevInfo = finddevice(&DevInfoList, busNo, devNo); |
| 1281 | if (pDevInfo && (pDevInfo->state.created == 1)) { |
| 1282 | LOGERR("CONTROLVM_DEVICE_CREATE Failed: busNo=%lu, devNo=%lu already exists", |
| 1283 | busNo, devNo); |
| 1284 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo, |
| 1285 | POSTCODE_SEVERITY_ERR); |
| 1286 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
| 1287 | goto Away; |
| 1288 | } |
| 1289 | pBusInfo = findbus(&BusInfoList, busNo); |
| 1290 | if (!pBusInfo) { |
| 1291 | LOGERR("CONTROLVM_DEVICE_CREATE Failed: Invalid bus %lu - out of range", |
| 1292 | busNo); |
| 1293 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo, |
| 1294 | POSTCODE_SEVERITY_ERR); |
| 1295 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
| 1296 | goto Away; |
| 1297 | } |
| 1298 | if (pBusInfo->state.created == 0) { |
| 1299 | LOGERR("CONTROLVM_DEVICE_CREATE Failed: Invalid bus %lu - not created yet", |
| 1300 | busNo); |
| 1301 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo, |
| 1302 | POSTCODE_SEVERITY_ERR); |
| 1303 | rc = -CONTROLVM_RESP_ERROR_BUS_INVALID; |
| 1304 | goto Away; |
| 1305 | } |
| 1306 | pDevInfo = kzalloc(sizeof(VISORCHIPSET_DEVICE_INFO), GFP_KERNEL); |
| 1307 | if (pDevInfo == NULL) { |
| 1308 | LOGERR("CONTROLVM_DEVICE_CREATE Failed: busNo=%lu, devNo=%lu kmaloc failed", |
| 1309 | busNo, devNo); |
| 1310 | POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, devNo, busNo, |
| 1311 | POSTCODE_SEVERITY_ERR); |
| 1312 | rc = -CONTROLVM_RESP_ERROR_KMALLOC_FAILED; |
| 1313 | goto Away; |
| 1314 | } |
| 1315 | |
| 1316 | INIT_LIST_HEAD(&pDevInfo->entry); |
| 1317 | pDevInfo->busNo = busNo; |
| 1318 | pDevInfo->devNo = devNo; |
| 1319 | pDevInfo->devInstGuid = cmd->createDevice.devInstGuid; |
| 1320 | POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, devNo, busNo, |
| 1321 | POSTCODE_SEVERITY_INFO); |
| 1322 | |
| 1323 | if (inmsg->hdr.Flags.testMessage == 1) |
| 1324 | pDevInfo->chanInfo.addrType = ADDRTYPE_localTest; |
| 1325 | else |
| 1326 | pDevInfo->chanInfo.addrType = ADDRTYPE_localPhysical; |
| 1327 | pDevInfo->chanInfo.channelAddr = cmd->createDevice.channelAddr; |
| 1328 | pDevInfo->chanInfo.nChannelBytes = cmd->createDevice.channelBytes; |
| 1329 | pDevInfo->chanInfo.channelTypeGuid = cmd->createDevice.dataTypeGuid; |
| 1330 | pDevInfo->chanInfo.intr = cmd->createDevice.intr; |
| 1331 | list_add(&pDevInfo->entry, &DevInfoList); |
| 1332 | POSTCODE_LINUX_4(DEVICE_CREATE_EXIT_PC, devNo, busNo, |
| 1333 | POSTCODE_SEVERITY_INFO); |
| 1334 | Away: |
| 1335 | /* get the bus and devNo for DiagPool channel */ |
| 1336 | if (is_diagpool_channel(pDevInfo->chanInfo.channelTypeGuid)) { |
| 1337 | g_diagpoolBusNo = busNo; |
| 1338 | g_diagpoolDevNo = devNo; |
| 1339 | LOGINF("CONTROLVM_DEVICE_CREATE for DiagPool channel: busNo=%lu, devNo=%lu", |
| 1340 | g_diagpoolBusNo, g_diagpoolDevNo); |
| 1341 | } |
| 1342 | device_epilog(busNo, devNo, SegmentStateRunning, |
| 1343 | CONTROLVM_DEVICE_CREATE, &inmsg->hdr, rc, |
| 1344 | inmsg->hdr.Flags.responseExpected == 1, |
| 1345 | FOR_VISORBUS(pDevInfo->chanInfo.channelTypeGuid)); |
| 1346 | } |
| 1347 | |
| 1348 | static void |
| 1349 | my_device_changestate(CONTROLVM_MESSAGE *inmsg) |
| 1350 | { |
| 1351 | CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd; |
| 1352 | ulong busNo = cmd->deviceChangeState.busNo; |
| 1353 | ulong devNo = cmd->deviceChangeState.devNo; |
| 1354 | ULTRA_SEGMENT_STATE state = cmd->deviceChangeState.state; |
| 1355 | VISORCHIPSET_DEVICE_INFO *pDevInfo = NULL; |
| 1356 | int rc = CONTROLVM_RESP_SUCCESS; |
| 1357 | |
| 1358 | pDevInfo = finddevice(&DevInfoList, busNo, devNo); |
| 1359 | if (!pDevInfo) { |
| 1360 | LOGERR("CONTROLVM_DEVICE_CHANGESTATE Failed: busNo=%lu, devNo=%lu invalid (doesn't exist)", |
| 1361 | busNo, devNo); |
| 1362 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, devNo, busNo, |
| 1363 | POSTCODE_SEVERITY_ERR); |
| 1364 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
| 1365 | goto Away; |
| 1366 | } |
| 1367 | if (pDevInfo->state.created == 0) { |
| 1368 | LOGERR("CONTROLVM_DEVICE_CHANGESTATE Failed: busNo=%lu, devNo=%lu invalid (not created)", |
| 1369 | busNo, devNo); |
| 1370 | POSTCODE_LINUX_4(DEVICE_CHANGESTATE_FAILURE_PC, devNo, busNo, |
| 1371 | POSTCODE_SEVERITY_ERR); |
| 1372 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
| 1373 | } |
| 1374 | Away: |
| 1375 | if ((rc >= CONTROLVM_RESP_SUCCESS) && pDevInfo) |
| 1376 | device_epilog(busNo, devNo, state, CONTROLVM_DEVICE_CHANGESTATE, |
| 1377 | &inmsg->hdr, rc, |
| 1378 | inmsg->hdr.Flags.responseExpected == 1, |
| 1379 | FOR_VISORBUS(pDevInfo->chanInfo.channelTypeGuid)); |
| 1380 | } |
| 1381 | |
| 1382 | static void |
| 1383 | my_device_destroy(CONTROLVM_MESSAGE *inmsg) |
| 1384 | { |
| 1385 | CONTROLVM_MESSAGE_PACKET *cmd = &inmsg->cmd; |
| 1386 | ulong busNo = cmd->destroyDevice.busNo; |
| 1387 | ulong devNo = cmd->destroyDevice.devNo; |
| 1388 | VISORCHIPSET_DEVICE_INFO *pDevInfo = NULL; |
| 1389 | int rc = CONTROLVM_RESP_SUCCESS; |
| 1390 | |
| 1391 | pDevInfo = finddevice(&DevInfoList, busNo, devNo); |
| 1392 | if (!pDevInfo) { |
| 1393 | LOGERR("CONTROLVM_DEVICE_DESTROY Failed: busNo=%lu, devNo=%lu invalid", |
| 1394 | busNo, devNo); |
| 1395 | rc = -CONTROLVM_RESP_ERROR_DEVICE_INVALID; |
| 1396 | goto Away; |
| 1397 | } |
| 1398 | if (pDevInfo->state.created == 0) { |
| 1399 | LOGERR("CONTROLVM_DEVICE_DESTROY Failed: busNo=%lu, devNo=%lu already destroyed", |
| 1400 | busNo, devNo); |
| 1401 | rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE; |
| 1402 | } |
| 1403 | |
| 1404 | Away: |
| 1405 | if ((rc >= CONTROLVM_RESP_SUCCESS) && pDevInfo) |
| 1406 | device_epilog(busNo, devNo, SegmentStateRunning, |
| 1407 | CONTROLVM_DEVICE_DESTROY, &inmsg->hdr, rc, |
| 1408 | inmsg->hdr.Flags.responseExpected == 1, |
| 1409 | FOR_VISORBUS(pDevInfo->chanInfo.channelTypeGuid)); |
| 1410 | } |
| 1411 | |
| 1412 | /* When provided with the physical address of the controlvm channel |
| 1413 | * (phys_addr), the offset to the payload area we need to manage |
| 1414 | * (offset), and the size of this payload area (bytes), fills in the |
| 1415 | * CONTROLVM_PAYLOAD_INFO struct. Returns TRUE for success or FALSE |
| 1416 | * for failure. |
| 1417 | */ |
| 1418 | static int |
| 1419 | initialize_controlvm_payload_info(HOSTADDRESS phys_addr, U64 offset, U32 bytes, |
| 1420 | CONTROLVM_PAYLOAD_INFO *info) |
| 1421 | { |
| 1422 | U8 __iomem *payload = NULL; |
| 1423 | int rc = CONTROLVM_RESP_SUCCESS; |
| 1424 | |
| 1425 | if (info == NULL) { |
| 1426 | LOGERR("HUH ? CONTROLVM_PAYLOAD_INIT Failed : Programmer check at %s:%d", |
| 1427 | __FILE__, __LINE__); |
| 1428 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
| 1429 | goto Away; |
| 1430 | } |
| 1431 | memset(info, 0, sizeof(CONTROLVM_PAYLOAD_INFO)); |
| 1432 | if ((offset == 0) || (bytes == 0)) { |
| 1433 | LOGERR("CONTROLVM_PAYLOAD_INIT Failed: RequestPayloadOffset=%llu RequestPayloadBytes=%llu!", |
| 1434 | (u64) offset, (u64) bytes); |
| 1435 | rc = -CONTROLVM_RESP_ERROR_PAYLOAD_INVALID; |
| 1436 | goto Away; |
| 1437 | } |
| 1438 | payload = ioremap_cache(phys_addr + offset, bytes); |
| 1439 | if (payload == NULL) { |
| 1440 | LOGERR("CONTROLVM_PAYLOAD_INIT Failed: ioremap_cache %llu for %llu bytes failed", |
| 1441 | (u64) offset, (u64) bytes); |
| 1442 | rc = -CONTROLVM_RESP_ERROR_IOREMAP_FAILED; |
| 1443 | goto Away; |
| 1444 | } |
| 1445 | |
| 1446 | info->offset = offset; |
| 1447 | info->bytes = bytes; |
| 1448 | info->ptr = payload; |
| 1449 | LOGINF("offset=%llu, bytes=%lu, ptr=%p", |
| 1450 | (u64) (info->offset), (ulong) (info->bytes), info->ptr); |
| 1451 | |
| 1452 | Away: |
| 1453 | if (rc < 0) { |
| 1454 | if (payload != NULL) { |
| 1455 | iounmap(payload); |
| 1456 | payload = NULL; |
| 1457 | } |
| 1458 | } |
| 1459 | return rc; |
| 1460 | } |
| 1461 | |
| 1462 | static void |
| 1463 | destroy_controlvm_payload_info(CONTROLVM_PAYLOAD_INFO *info) |
| 1464 | { |
| 1465 | if (info->ptr != NULL) { |
| 1466 | iounmap(info->ptr); |
| 1467 | info->ptr = NULL; |
| 1468 | } |
| 1469 | memset(info, 0, sizeof(CONTROLVM_PAYLOAD_INFO)); |
| 1470 | } |
| 1471 | |
| 1472 | static void |
| 1473 | initialize_controlvm_payload(void) |
| 1474 | { |
| 1475 | HOSTADDRESS phys_addr = visorchannel_get_physaddr(ControlVm_channel); |
| 1476 | U64 payloadOffset = 0; |
| 1477 | U32 payloadBytes = 0; |
| 1478 | if (visorchannel_read(ControlVm_channel, |
| 1479 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 1480 | RequestPayloadOffset), |
| 1481 | &payloadOffset, sizeof(payloadOffset)) < 0) { |
| 1482 | LOGERR("CONTROLVM_PAYLOAD_INIT Failed to read controlvm channel!"); |
| 1483 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
| 1484 | POSTCODE_SEVERITY_ERR); |
| 1485 | return; |
| 1486 | } |
| 1487 | if (visorchannel_read(ControlVm_channel, |
| 1488 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 1489 | RequestPayloadBytes), |
| 1490 | &payloadBytes, sizeof(payloadBytes)) < 0) { |
| 1491 | LOGERR("CONTROLVM_PAYLOAD_INIT Failed to read controlvm channel!"); |
| 1492 | POSTCODE_LINUX_2(CONTROLVM_INIT_FAILURE_PC, |
| 1493 | POSTCODE_SEVERITY_ERR); |
| 1494 | return; |
| 1495 | } |
| 1496 | initialize_controlvm_payload_info(phys_addr, |
| 1497 | payloadOffset, payloadBytes, |
| 1498 | &ControlVm_payload_info); |
| 1499 | } |
| 1500 | |
| 1501 | /* Send ACTION=online for DEVPATH=/sys/devices/platform/visorchipset. |
| 1502 | * Returns CONTROLVM_RESP_xxx code. |
| 1503 | */ |
| 1504 | int |
| 1505 | visorchipset_chipset_ready(void) |
| 1506 | { |
| 1507 | kobject_uevent(&Visorchipset_platform_device.dev.kobj, KOBJ_ONLINE); |
| 1508 | return CONTROLVM_RESP_SUCCESS; |
| 1509 | } |
| 1510 | EXPORT_SYMBOL_GPL(visorchipset_chipset_ready); |
| 1511 | |
| 1512 | int |
| 1513 | visorchipset_chipset_selftest(void) |
| 1514 | { |
| 1515 | char env_selftest[20]; |
| 1516 | char *envp[] = { env_selftest, NULL }; |
| 1517 | sprintf(env_selftest, "SPARSP_SELFTEST=%d", 1); |
| 1518 | kobject_uevent_env(&Visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
| 1519 | envp); |
| 1520 | return CONTROLVM_RESP_SUCCESS; |
| 1521 | } |
| 1522 | EXPORT_SYMBOL_GPL(visorchipset_chipset_selftest); |
| 1523 | |
| 1524 | /* Send ACTION=offline for DEVPATH=/sys/devices/platform/visorchipset. |
| 1525 | * Returns CONTROLVM_RESP_xxx code. |
| 1526 | */ |
| 1527 | int |
| 1528 | visorchipset_chipset_notready(void) |
| 1529 | { |
| 1530 | kobject_uevent(&Visorchipset_platform_device.dev.kobj, KOBJ_OFFLINE); |
| 1531 | return CONTROLVM_RESP_SUCCESS; |
| 1532 | } |
| 1533 | EXPORT_SYMBOL_GPL(visorchipset_chipset_notready); |
| 1534 | |
| 1535 | static void |
| 1536 | chipset_ready(CONTROLVM_MESSAGE_HEADER *msgHdr) |
| 1537 | { |
| 1538 | int rc = visorchipset_chipset_ready(); |
| 1539 | if (rc != CONTROLVM_RESP_SUCCESS) |
| 1540 | rc = -rc; |
| 1541 | if (msgHdr->Flags.responseExpected && !visorchipset_holdchipsetready) |
| 1542 | controlvm_respond(msgHdr, rc); |
| 1543 | if (msgHdr->Flags.responseExpected && visorchipset_holdchipsetready) { |
| 1544 | /* Send CHIPSET_READY response when all modules have been loaded |
| 1545 | * and disks mounted for the partition |
| 1546 | */ |
| 1547 | g_ChipSetMsgHdr = *msgHdr; |
| 1548 | LOGINF("Holding CHIPSET_READY response"); |
| 1549 | } |
| 1550 | } |
| 1551 | |
| 1552 | static void |
| 1553 | chipset_selftest(CONTROLVM_MESSAGE_HEADER *msgHdr) |
| 1554 | { |
| 1555 | int rc = visorchipset_chipset_selftest(); |
| 1556 | if (rc != CONTROLVM_RESP_SUCCESS) |
| 1557 | rc = -rc; |
| 1558 | if (msgHdr->Flags.responseExpected) |
| 1559 | controlvm_respond(msgHdr, rc); |
| 1560 | } |
| 1561 | |
| 1562 | static void |
| 1563 | chipset_notready(CONTROLVM_MESSAGE_HEADER *msgHdr) |
| 1564 | { |
| 1565 | int rc = visorchipset_chipset_notready(); |
| 1566 | if (rc != CONTROLVM_RESP_SUCCESS) |
| 1567 | rc = -rc; |
| 1568 | if (msgHdr->Flags.responseExpected) |
| 1569 | controlvm_respond(msgHdr, rc); |
| 1570 | } |
| 1571 | |
| 1572 | /* This is your "one-stop" shop for grabbing the next message from the |
| 1573 | * CONTROLVM_QUEUE_EVENT queue in the controlvm channel. |
| 1574 | */ |
| 1575 | static BOOL |
| 1576 | read_controlvm_event(CONTROLVM_MESSAGE *msg) |
| 1577 | { |
| 1578 | if (visorchannel_signalremove(ControlVm_channel, |
| 1579 | CONTROLVM_QUEUE_EVENT, msg)) { |
| 1580 | /* got a message */ |
| 1581 | if (msg->hdr.Flags.testMessage == 1) { |
| 1582 | LOGERR("ignoring bad CONTROLVM_QUEUE_EVENT msg with controlvm_msg_id=0x%x because Flags.testMessage is nonsensical (=1)", msg->hdr.Id); |
| 1583 | return FALSE; |
| 1584 | } else |
| 1585 | return TRUE; |
| 1586 | } |
| 1587 | return FALSE; |
| 1588 | } |
| 1589 | |
| 1590 | /* |
| 1591 | * The general parahotplug flow works as follows. The visorchipset |
| 1592 | * driver receives a DEVICE_CHANGESTATE message from Command |
| 1593 | * specifying a physical device to enable or disable. The CONTROLVM |
| 1594 | * message handler calls parahotplug_process_message, which then adds |
| 1595 | * the message to a global list and kicks off a udev event which |
| 1596 | * causes a user level script to enable or disable the specified |
| 1597 | * device. The udev script then writes to |
| 1598 | * /proc/visorchipset/parahotplug, which causes parahotplug_proc_write |
| 1599 | * to get called, at which point the appropriate CONTROLVM message is |
| 1600 | * retrieved from the list and responded to. |
| 1601 | */ |
| 1602 | |
| 1603 | #define PARAHOTPLUG_TIMEOUT_MS 2000 |
| 1604 | |
| 1605 | /* |
| 1606 | * Generate unique int to match an outstanding CONTROLVM message with a |
| 1607 | * udev script /proc response |
| 1608 | */ |
| 1609 | static int |
| 1610 | parahotplug_next_id(void) |
| 1611 | { |
| 1612 | static atomic_t id = ATOMIC_INIT(0); |
| 1613 | return atomic_inc_return(&id); |
| 1614 | } |
| 1615 | |
| 1616 | /* |
| 1617 | * Returns the time (in jiffies) when a CONTROLVM message on the list |
| 1618 | * should expire -- PARAHOTPLUG_TIMEOUT_MS in the future |
| 1619 | */ |
| 1620 | static unsigned long |
| 1621 | parahotplug_next_expiration(void) |
| 1622 | { |
| 1623 | return jiffies + PARAHOTPLUG_TIMEOUT_MS * HZ / 1000; |
| 1624 | } |
| 1625 | |
| 1626 | /* |
| 1627 | * Create a parahotplug_request, which is basically a wrapper for a |
| 1628 | * CONTROLVM_MESSAGE that we can stick on a list |
| 1629 | */ |
| 1630 | static struct parahotplug_request * |
| 1631 | parahotplug_request_create(CONTROLVM_MESSAGE *msg) |
| 1632 | { |
| 1633 | struct parahotplug_request *req = |
| 1634 | kmalloc(sizeof(struct parahotplug_request), |
| 1635 | GFP_KERNEL|__GFP_NORETRY); |
| 1636 | if (req == NULL) |
| 1637 | return NULL; |
| 1638 | |
| 1639 | req->id = parahotplug_next_id(); |
| 1640 | req->expiration = parahotplug_next_expiration(); |
| 1641 | req->msg = *msg; |
| 1642 | |
| 1643 | return req; |
| 1644 | } |
| 1645 | |
| 1646 | /* |
| 1647 | * Free a parahotplug_request. |
| 1648 | */ |
| 1649 | static void |
| 1650 | parahotplug_request_destroy(struct parahotplug_request *req) |
| 1651 | { |
| 1652 | kfree(req); |
| 1653 | } |
| 1654 | |
| 1655 | /* |
| 1656 | * Cause uevent to run the user level script to do the disable/enable |
| 1657 | * specified in (the CONTROLVM message in) the specified |
| 1658 | * parahotplug_request |
| 1659 | */ |
| 1660 | static void |
| 1661 | parahotplug_request_kickoff(struct parahotplug_request *req) |
| 1662 | { |
| 1663 | CONTROLVM_MESSAGE_PACKET *cmd = &req->msg.cmd; |
| 1664 | char env_cmd[40], env_id[40], env_state[40], env_bus[40], env_dev[40], |
| 1665 | env_func[40]; |
| 1666 | char *envp[] = { |
| 1667 | env_cmd, env_id, env_state, env_bus, env_dev, env_func, NULL |
| 1668 | }; |
| 1669 | |
| 1670 | sprintf(env_cmd, "SPAR_PARAHOTPLUG=1"); |
| 1671 | sprintf(env_id, "SPAR_PARAHOTPLUG_ID=%d", req->id); |
| 1672 | sprintf(env_state, "SPAR_PARAHOTPLUG_STATE=%d", |
| 1673 | cmd->deviceChangeState.state.Active); |
| 1674 | sprintf(env_bus, "SPAR_PARAHOTPLUG_BUS=%d", |
| 1675 | cmd->deviceChangeState.busNo); |
| 1676 | sprintf(env_dev, "SPAR_PARAHOTPLUG_DEVICE=%d", |
| 1677 | cmd->deviceChangeState.devNo >> 3); |
| 1678 | sprintf(env_func, "SPAR_PARAHOTPLUG_FUNCTION=%d", |
| 1679 | cmd->deviceChangeState.devNo & 0x7); |
| 1680 | |
| 1681 | LOGINF("parahotplug_request_kickoff: state=%d, bdf=%d/%d/%d, id=%u\n", |
| 1682 | cmd->deviceChangeState.state.Active, |
| 1683 | cmd->deviceChangeState.busNo, cmd->deviceChangeState.devNo >> 3, |
| 1684 | cmd->deviceChangeState.devNo & 7, req->id); |
| 1685 | |
| 1686 | kobject_uevent_env(&Visorchipset_platform_device.dev.kobj, KOBJ_CHANGE, |
| 1687 | envp); |
| 1688 | } |
| 1689 | |
| 1690 | /* |
| 1691 | * Remove any request from the list that's been on there too long and |
| 1692 | * respond with an error. |
| 1693 | */ |
| 1694 | static void |
| 1695 | parahotplug_process_list(void) |
| 1696 | { |
| 1697 | struct list_head *pos = NULL; |
| 1698 | struct list_head *tmp = NULL; |
| 1699 | |
| 1700 | spin_lock(&Parahotplug_request_list_lock); |
| 1701 | |
| 1702 | list_for_each_safe(pos, tmp, &Parahotplug_request_list) { |
| 1703 | struct parahotplug_request *req = |
| 1704 | list_entry(pos, struct parahotplug_request, list); |
| 1705 | if (time_after_eq(jiffies, req->expiration)) { |
| 1706 | list_del(pos); |
| 1707 | if (req->msg.hdr.Flags.responseExpected) |
| 1708 | controlvm_respond_physdev_changestate( |
| 1709 | &req->msg.hdr, |
| 1710 | CONTROLVM_RESP_ERROR_DEVICE_UDEV_TIMEOUT, |
| 1711 | req->msg.cmd.deviceChangeState.state); |
| 1712 | parahotplug_request_destroy(req); |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | spin_unlock(&Parahotplug_request_list_lock); |
| 1717 | } |
| 1718 | |
| 1719 | /* |
| 1720 | * Called from the /proc handler, which means the user script has |
| 1721 | * finished the enable/disable. Find the matching identifier, and |
| 1722 | * respond to the CONTROLVM message with success. |
| 1723 | */ |
| 1724 | static int |
| 1725 | parahotplug_request_complete(int id, U16 active) |
| 1726 | { |
| 1727 | struct list_head *pos = NULL; |
| 1728 | struct list_head *tmp = NULL; |
| 1729 | |
| 1730 | spin_lock(&Parahotplug_request_list_lock); |
| 1731 | |
| 1732 | /* Look for a request matching "id". */ |
| 1733 | list_for_each_safe(pos, tmp, &Parahotplug_request_list) { |
| 1734 | struct parahotplug_request *req = |
| 1735 | list_entry(pos, struct parahotplug_request, list); |
| 1736 | if (req->id == id) { |
| 1737 | /* Found a match. Remove it from the list and |
| 1738 | * respond. |
| 1739 | */ |
| 1740 | list_del(pos); |
| 1741 | spin_unlock(&Parahotplug_request_list_lock); |
| 1742 | req->msg.cmd.deviceChangeState.state.Active = active; |
| 1743 | if (req->msg.hdr.Flags.responseExpected) |
| 1744 | controlvm_respond_physdev_changestate( |
| 1745 | &req->msg.hdr, CONTROLVM_RESP_SUCCESS, |
| 1746 | req->msg.cmd.deviceChangeState.state); |
| 1747 | parahotplug_request_destroy(req); |
| 1748 | return 0; |
| 1749 | } |
| 1750 | } |
| 1751 | |
| 1752 | spin_unlock(&Parahotplug_request_list_lock); |
| 1753 | return -1; |
| 1754 | } |
| 1755 | |
| 1756 | /* |
| 1757 | * Enables or disables a PCI device by kicking off a udev script |
| 1758 | */ |
| 1759 | static void |
| 1760 | parahotplug_process_message(CONTROLVM_MESSAGE *inmsg) |
| 1761 | { |
| 1762 | struct parahotplug_request *req; |
| 1763 | |
| 1764 | req = parahotplug_request_create(inmsg); |
| 1765 | |
| 1766 | if (req == NULL) { |
| 1767 | LOGERR("parahotplug_process_message: couldn't allocate request"); |
| 1768 | return; |
| 1769 | } |
| 1770 | |
| 1771 | if (inmsg->cmd.deviceChangeState.state.Active) { |
| 1772 | /* For enable messages, just respond with success |
| 1773 | * right away. This is a bit of a hack, but there are |
| 1774 | * issues with the early enable messages we get (with |
| 1775 | * either the udev script not detecting that the device |
| 1776 | * is up, or not getting called at all). Fortunately |
| 1777 | * the messages that get lost don't matter anyway, as |
| 1778 | * devices are automatically enabled at |
| 1779 | * initialization. |
| 1780 | */ |
| 1781 | parahotplug_request_kickoff(req); |
| 1782 | controlvm_respond_physdev_changestate(&inmsg->hdr, |
| 1783 | CONTROLVM_RESP_SUCCESS, |
| 1784 | inmsg->cmd. |
| 1785 | deviceChangeState.state); |
| 1786 | parahotplug_request_destroy(req); |
| 1787 | } else { |
| 1788 | /* For disable messages, add the request to the |
| 1789 | * request list before kicking off the udev script. It |
| 1790 | * won't get responded to until the script has |
| 1791 | * indicated it's done. |
| 1792 | */ |
| 1793 | spin_lock(&Parahotplug_request_list_lock); |
| 1794 | list_add_tail(&(req->list), &Parahotplug_request_list); |
| 1795 | spin_unlock(&Parahotplug_request_list_lock); |
| 1796 | |
| 1797 | parahotplug_request_kickoff(req); |
| 1798 | } |
| 1799 | } |
| 1800 | |
| 1801 | /* |
| 1802 | * Gets called when the udev script writes to |
| 1803 | * /proc/visorchipset/parahotplug. Expects input in the form of "<id> |
| 1804 | * <active>" where <id> is the identifier passed to the script that |
| 1805 | * matches a request on the request list, and <active> is 0 or 1 |
| 1806 | * indicating whether the device is now enabled or not. |
| 1807 | */ |
| 1808 | static ssize_t |
| 1809 | parahotplug_proc_write(struct file *file, const char __user *buffer, |
| 1810 | size_t count, loff_t *ppos) |
| 1811 | { |
| 1812 | char buf[64]; |
| 1813 | uint id; |
| 1814 | ushort active; |
| 1815 | |
| 1816 | if (count > sizeof(buf) - 1) { |
| 1817 | LOGERR("parahotplug_proc_write: count (%d) exceeds size of buffer (%d)", |
| 1818 | (int) count, (int) sizeof(buf)); |
| 1819 | return -EINVAL; |
| 1820 | } |
| 1821 | if (copy_from_user(buf, buffer, count)) { |
| 1822 | LOGERR("parahotplug_proc_write: copy_from_user failed"); |
| 1823 | return -EFAULT; |
| 1824 | } |
| 1825 | buf[count] = '\0'; |
| 1826 | |
| 1827 | if (sscanf(buf, "%u %hu", &id, &active) != 2) { |
| 1828 | id = 0; |
| 1829 | active = 0; |
| 1830 | } |
| 1831 | |
| 1832 | if (active != 1 && active != 0) { |
| 1833 | LOGERR("parahotplug_proc_write: invalid active field"); |
| 1834 | return -EINVAL; |
| 1835 | } |
| 1836 | |
| 1837 | parahotplug_request_complete((int) id, (U16) active); |
| 1838 | |
| 1839 | return count; |
| 1840 | } |
| 1841 | |
| 1842 | static const struct file_operations parahotplug_proc_fops = { |
| 1843 | .owner = THIS_MODULE, |
| 1844 | .read = visorchipset_proc_read_writeonly, |
| 1845 | .write = parahotplug_proc_write, |
| 1846 | }; |
| 1847 | |
| 1848 | /* Process a controlvm message. |
| 1849 | * Return result: |
| 1850 | * FALSE - this function will return FALSE only in the case where the |
| 1851 | * controlvm message was NOT processed, but processing must be |
| 1852 | * retried before reading the next controlvm message; a |
| 1853 | * scenario where this can occur is when we need to throttle |
| 1854 | * the allocation of memory in which to copy out controlvm |
| 1855 | * payload data |
| 1856 | * TRUE - processing of the controlvm message completed, |
| 1857 | * either successfully or with an error. |
| 1858 | */ |
| 1859 | static BOOL |
| 1860 | handle_command(CONTROLVM_MESSAGE inmsg, HOSTADDRESS channel_addr) |
| 1861 | { |
| 1862 | CONTROLVM_MESSAGE_PACKET *cmd = &inmsg.cmd; |
| 1863 | U64 parametersAddr = 0; |
| 1864 | U32 parametersBytes = 0; |
| 1865 | PARSER_CONTEXT *parser_ctx = NULL; |
| 1866 | BOOL isLocalAddr = FALSE; |
| 1867 | CONTROLVM_MESSAGE ackmsg; |
| 1868 | |
| 1869 | /* create parsing context if necessary */ |
| 1870 | isLocalAddr = (inmsg.hdr.Flags.testMessage == 1); |
| 1871 | if (channel_addr == 0) { |
| 1872 | LOGERR("HUH? channel_addr is 0!"); |
| 1873 | return TRUE; |
| 1874 | } |
| 1875 | parametersAddr = channel_addr + inmsg.hdr.PayloadVmOffset; |
| 1876 | parametersBytes = inmsg.hdr.PayloadBytes; |
| 1877 | |
| 1878 | /* Parameter and channel addresses within test messages actually lie |
| 1879 | * within our OS-controlled memory. We need to know that, because it |
| 1880 | * makes a difference in how we compute the virtual address. |
| 1881 | */ |
| 1882 | if (parametersAddr != 0 && parametersBytes != 0) { |
| 1883 | BOOL retry = FALSE; |
| 1884 | parser_ctx = |
| 1885 | parser_init_byteStream(parametersAddr, parametersBytes, |
| 1886 | isLocalAddr, &retry); |
| 1887 | if (!parser_ctx) { |
| 1888 | if (retry) { |
| 1889 | LOGWRN("throttling to copy payload"); |
| 1890 | return FALSE; |
| 1891 | } |
| 1892 | LOGWRN("parsing failed"); |
| 1893 | LOGWRN("inmsg.hdr.Id=0x%lx", (ulong) inmsg.hdr.Id); |
| 1894 | LOGWRN("parametersAddr=0x%llx", (u64) parametersAddr); |
| 1895 | LOGWRN("parametersBytes=%lu", (ulong) parametersBytes); |
| 1896 | LOGWRN("isLocalAddr=%d", isLocalAddr); |
| 1897 | } |
| 1898 | } |
| 1899 | |
| 1900 | if (!isLocalAddr) { |
| 1901 | controlvm_init_response(&ackmsg, &inmsg.hdr, |
| 1902 | CONTROLVM_RESP_SUCCESS); |
| 1903 | if ((ControlVm_channel) |
| 1904 | && |
| 1905 | (!visorchannel_signalinsert |
| 1906 | (ControlVm_channel, CONTROLVM_QUEUE_ACK, &ackmsg))) |
| 1907 | LOGWRN("failed to send ACK failed"); |
| 1908 | } |
| 1909 | switch (inmsg.hdr.Id) { |
| 1910 | case CONTROLVM_CHIPSET_INIT: |
| 1911 | LOGINF("CHIPSET_INIT(#busses=%lu,#switches=%lu)", |
| 1912 | (ulong) inmsg.cmd.initChipset.busCount, |
| 1913 | (ulong) inmsg.cmd.initChipset.switchCount); |
| 1914 | chipset_init(&inmsg); |
| 1915 | break; |
| 1916 | case CONTROLVM_BUS_CREATE: |
| 1917 | LOGINF("BUS_CREATE(%lu,#devs=%lu)", |
| 1918 | (ulong) cmd->createBus.busNo, |
| 1919 | (ulong) cmd->createBus.deviceCount); |
| 1920 | bus_create(&inmsg); |
| 1921 | break; |
| 1922 | case CONTROLVM_BUS_DESTROY: |
| 1923 | LOGINF("BUS_DESTROY(%lu)", (ulong) cmd->destroyBus.busNo); |
| 1924 | bus_destroy(&inmsg); |
| 1925 | break; |
| 1926 | case CONTROLVM_BUS_CONFIGURE: |
| 1927 | LOGINF("BUS_CONFIGURE(%lu)", (ulong) cmd->configureBus.busNo); |
| 1928 | bus_configure(&inmsg, parser_ctx); |
| 1929 | break; |
| 1930 | case CONTROLVM_DEVICE_CREATE: |
| 1931 | LOGINF("DEVICE_CREATE(%lu,%lu)", |
| 1932 | (ulong) cmd->createDevice.busNo, |
| 1933 | (ulong) cmd->createDevice.devNo); |
| 1934 | my_device_create(&inmsg); |
| 1935 | break; |
| 1936 | case CONTROLVM_DEVICE_CHANGESTATE: |
| 1937 | if (cmd->deviceChangeState.flags.physicalDevice) { |
| 1938 | LOGINF("DEVICE_CHANGESTATE for physical device (%lu,%lu, active=%lu)", |
| 1939 | (ulong) cmd->deviceChangeState.busNo, |
| 1940 | (ulong) cmd->deviceChangeState.devNo, |
| 1941 | (ulong) cmd->deviceChangeState.state.Active); |
| 1942 | parahotplug_process_message(&inmsg); |
| 1943 | } else { |
| 1944 | LOGINF("DEVICE_CHANGESTATE for virtual device (%lu,%lu, state.Alive=0x%lx)", |
| 1945 | (ulong) cmd->deviceChangeState.busNo, |
| 1946 | (ulong) cmd->deviceChangeState.devNo, |
| 1947 | (ulong) cmd->deviceChangeState.state.Alive); |
| 1948 | /* save the hdr and cmd structures for later use */ |
| 1949 | /* when sending back the response to Command */ |
| 1950 | my_device_changestate(&inmsg); |
| 1951 | g_DiagMsgHdr = inmsg.hdr; |
| 1952 | g_DeviceChangeStatePacket = inmsg.cmd; |
| 1953 | break; |
| 1954 | } |
| 1955 | break; |
| 1956 | case CONTROLVM_DEVICE_DESTROY: |
| 1957 | LOGINF("DEVICE_DESTROY(%lu,%lu)", |
| 1958 | (ulong) cmd->destroyDevice.busNo, |
| 1959 | (ulong) cmd->destroyDevice.devNo); |
| 1960 | my_device_destroy(&inmsg); |
| 1961 | break; |
| 1962 | case CONTROLVM_DEVICE_CONFIGURE: |
| 1963 | LOGINF("DEVICE_CONFIGURE(%lu,%lu)", |
| 1964 | (ulong) cmd->configureDevice.busNo, |
| 1965 | (ulong) cmd->configureDevice.devNo); |
| 1966 | /* no op for now, just send a respond that we passed */ |
| 1967 | if (inmsg.hdr.Flags.responseExpected) |
| 1968 | controlvm_respond(&inmsg.hdr, CONTROLVM_RESP_SUCCESS); |
| 1969 | break; |
| 1970 | case CONTROLVM_CHIPSET_READY: |
| 1971 | LOGINF("CHIPSET_READY"); |
| 1972 | chipset_ready(&inmsg.hdr); |
| 1973 | break; |
| 1974 | case CONTROLVM_CHIPSET_SELFTEST: |
| 1975 | LOGINF("CHIPSET_SELFTEST"); |
| 1976 | chipset_selftest(&inmsg.hdr); |
| 1977 | break; |
| 1978 | case CONTROLVM_CHIPSET_STOP: |
| 1979 | LOGINF("CHIPSET_STOP"); |
| 1980 | chipset_notready(&inmsg.hdr); |
| 1981 | break; |
| 1982 | default: |
| 1983 | LOGERR("unrecognized controlvm cmd=%d", (int) inmsg.hdr.Id); |
| 1984 | if (inmsg.hdr.Flags.responseExpected) |
| 1985 | controlvm_respond(&inmsg.hdr, |
| 1986 | -CONTROLVM_RESP_ERROR_MESSAGE_ID_UNKNOWN); |
| 1987 | break; |
| 1988 | } |
| 1989 | |
| 1990 | if (parser_ctx != NULL) { |
| 1991 | parser_done(parser_ctx); |
| 1992 | parser_ctx = NULL; |
| 1993 | } |
| 1994 | return TRUE; |
| 1995 | } |
| 1996 | |
| 1997 | HOSTADDRESS controlvm_get_channel_address(void) |
| 1998 | { |
| 1999 | U64 addr = 0; |
| 2000 | U32 size = 0; |
| 2001 | |
| 2002 | if (!VMCALL_SUCCESSFUL(Issue_VMCALL_IO_CONTROLVM_ADDR(&addr, &size))) { |
| 2003 | ERRDRV("%s - vmcall to determine controlvm channel addr failed", |
| 2004 | __func__); |
| 2005 | return 0; |
| 2006 | } |
| 2007 | INFODRV("controlvm addr=%Lx", addr); |
| 2008 | return addr; |
| 2009 | } |
| 2010 | |
| 2011 | static void |
| 2012 | controlvm_periodic_work(struct work_struct *work) |
| 2013 | { |
| 2014 | VISORCHIPSET_CHANNEL_INFO chanInfo; |
| 2015 | CONTROLVM_MESSAGE inmsg; |
| 2016 | BOOL gotACommand = FALSE; |
| 2017 | BOOL handle_command_failed = FALSE; |
| 2018 | static U64 Poll_Count; |
| 2019 | |
| 2020 | /* make sure visorbus server is registered for controlvm callbacks */ |
| 2021 | if (visorchipset_serverregwait && !serverregistered) |
| 2022 | goto Away; |
| 2023 | /* make sure visorclientbus server is regsitered for controlvm |
| 2024 | * callbacks |
| 2025 | */ |
| 2026 | if (visorchipset_clientregwait && !clientregistered) |
| 2027 | goto Away; |
| 2028 | |
| 2029 | memset(&chanInfo, 0, sizeof(VISORCHIPSET_CHANNEL_INFO)); |
| 2030 | |
| 2031 | Poll_Count++; |
| 2032 | if (Poll_Count >= 250) |
| 2033 | ; /* keep going */ |
| 2034 | else |
| 2035 | goto Away; |
| 2036 | |
| 2037 | /* Check events to determine if response to CHIPSET_READY |
| 2038 | * should be sent |
| 2039 | */ |
| 2040 | if (visorchipset_holdchipsetready |
| 2041 | && (g_ChipSetMsgHdr.Id != CONTROLVM_INVALID)) { |
| 2042 | if (check_chipset_events() == 1) { |
| 2043 | LOGINF("Sending CHIPSET_READY response"); |
| 2044 | controlvm_respond(&g_ChipSetMsgHdr, 0); |
| 2045 | clear_chipset_events(); |
| 2046 | memset(&g_ChipSetMsgHdr, 0, |
| 2047 | sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 2048 | } |
| 2049 | } |
| 2050 | |
| 2051 | while (visorchannel_signalremove(ControlVm_channel, |
| 2052 | CONTROLVM_QUEUE_RESPONSE, |
| 2053 | &inmsg)) { |
| 2054 | if (inmsg.hdr.PayloadMaxBytes != 0) { |
| 2055 | LOGERR("Payload of size %lu returned @%lu with unexpected message id %d.", |
| 2056 | (ulong) inmsg.hdr.PayloadMaxBytes, |
| 2057 | (ulong) inmsg.hdr.PayloadVmOffset, |
| 2058 | inmsg.hdr.Id); |
| 2059 | } |
| 2060 | } |
| 2061 | if (!gotACommand) { |
| 2062 | if (ControlVm_Pending_Msg_Valid) { |
| 2063 | /* we throttled processing of a prior |
| 2064 | * msg, so try to process it again |
| 2065 | * rather than reading a new one |
| 2066 | */ |
| 2067 | inmsg = ControlVm_Pending_Msg; |
| 2068 | ControlVm_Pending_Msg_Valid = FALSE; |
| 2069 | gotACommand = TRUE; |
| 2070 | } else |
| 2071 | gotACommand = read_controlvm_event(&inmsg); |
| 2072 | } |
| 2073 | |
| 2074 | handle_command_failed = FALSE; |
| 2075 | while (gotACommand && (!handle_command_failed)) { |
| 2076 | Most_recent_message_jiffies = jiffies; |
| 2077 | if (handle_command(inmsg, |
| 2078 | visorchannel_get_physaddr |
| 2079 | (ControlVm_channel))) |
| 2080 | gotACommand = read_controlvm_event(&inmsg); |
| 2081 | else { |
| 2082 | /* this is a scenario where throttling |
| 2083 | * is required, but probably NOT an |
| 2084 | * error...; we stash the current |
| 2085 | * controlvm msg so we will attempt to |
| 2086 | * reprocess it on our next loop |
| 2087 | */ |
| 2088 | handle_command_failed = TRUE; |
| 2089 | ControlVm_Pending_Msg = inmsg; |
| 2090 | ControlVm_Pending_Msg_Valid = TRUE; |
| 2091 | } |
| 2092 | } |
| 2093 | |
| 2094 | /* parahotplug_worker */ |
| 2095 | parahotplug_process_list(); |
| 2096 | |
| 2097 | Away: |
| 2098 | |
| 2099 | if (time_after(jiffies, |
| 2100 | Most_recent_message_jiffies + (HZ * MIN_IDLE_SECONDS))) { |
| 2101 | /* it's been longer than MIN_IDLE_SECONDS since we |
| 2102 | * processed our last controlvm message; slow down the |
| 2103 | * polling |
| 2104 | */ |
| 2105 | if (Poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_SLOW) { |
| 2106 | LOGINF("switched to slow controlvm polling"); |
| 2107 | Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; |
| 2108 | } |
| 2109 | } else { |
| 2110 | if (Poll_jiffies != POLLJIFFIES_CONTROLVMCHANNEL_FAST) { |
| 2111 | Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
| 2112 | LOGINF("switched to fast controlvm polling"); |
| 2113 | } |
| 2114 | } |
| 2115 | |
| 2116 | queue_delayed_work(Periodic_controlvm_workqueue, |
| 2117 | &Periodic_controlvm_work, Poll_jiffies); |
| 2118 | } |
| 2119 | |
| 2120 | static void |
| 2121 | setup_crash_devices_work_queue(struct work_struct *work) |
| 2122 | { |
| 2123 | |
| 2124 | CONTROLVM_MESSAGE localCrashCreateBusMsg; |
| 2125 | CONTROLVM_MESSAGE localCrashCreateDevMsg; |
| 2126 | CONTROLVM_MESSAGE msg; |
| 2127 | U32 localSavedCrashMsgOffset; |
| 2128 | U16 localSavedCrashMsgCount; |
| 2129 | |
| 2130 | /* make sure visorbus server is registered for controlvm callbacks */ |
| 2131 | if (visorchipset_serverregwait && !serverregistered) |
| 2132 | goto Away; |
| 2133 | |
| 2134 | /* make sure visorclientbus server is regsitered for controlvm |
| 2135 | * callbacks |
| 2136 | */ |
| 2137 | if (visorchipset_clientregwait && !clientregistered) |
| 2138 | goto Away; |
| 2139 | |
| 2140 | POSTCODE_LINUX_2(CRASH_DEV_ENTRY_PC, POSTCODE_SEVERITY_INFO); |
| 2141 | |
| 2142 | /* send init chipset msg */ |
| 2143 | msg.hdr.Id = CONTROLVM_CHIPSET_INIT; |
| 2144 | msg.cmd.initChipset.busCount = 23; |
| 2145 | msg.cmd.initChipset.switchCount = 0; |
| 2146 | |
| 2147 | chipset_init(&msg); |
| 2148 | |
| 2149 | /* get saved message count */ |
| 2150 | if (visorchannel_read(ControlVm_channel, |
| 2151 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 2152 | SavedCrashMsgCount), |
| 2153 | &localSavedCrashMsgCount, sizeof(U16)) < 0) { |
| 2154 | LOGERR("failed to get Saved Message Count"); |
| 2155 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
| 2156 | POSTCODE_SEVERITY_ERR); |
| 2157 | return; |
| 2158 | } |
| 2159 | |
| 2160 | if (localSavedCrashMsgCount != CONTROLVM_CRASHMSG_MAX) { |
| 2161 | LOGERR("Saved Message Count incorrect %d", |
| 2162 | localSavedCrashMsgCount); |
| 2163 | POSTCODE_LINUX_3(CRASH_DEV_COUNT_FAILURE_PC, |
| 2164 | localSavedCrashMsgCount, |
| 2165 | POSTCODE_SEVERITY_ERR); |
| 2166 | return; |
| 2167 | } |
| 2168 | |
| 2169 | /* get saved crash message offset */ |
| 2170 | if (visorchannel_read(ControlVm_channel, |
| 2171 | offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, |
| 2172 | SavedCrashMsgOffset), |
| 2173 | &localSavedCrashMsgOffset, sizeof(U32)) < 0) { |
| 2174 | LOGERR("failed to get Saved Message Offset"); |
| 2175 | POSTCODE_LINUX_2(CRASH_DEV_CTRL_RD_FAILURE_PC, |
| 2176 | POSTCODE_SEVERITY_ERR); |
| 2177 | return; |
| 2178 | } |
| 2179 | |
| 2180 | /* read create device message for storage bus offset */ |
| 2181 | if (visorchannel_read(ControlVm_channel, |
| 2182 | localSavedCrashMsgOffset, |
| 2183 | &localCrashCreateBusMsg, |
| 2184 | sizeof(CONTROLVM_MESSAGE)) < 0) { |
| 2185 | LOGERR("CRASH_DEV_RD_BUS_FAIULRE: Failed to read CrashCreateBusMsg!"); |
| 2186 | POSTCODE_LINUX_2(CRASH_DEV_RD_BUS_FAIULRE_PC, |
| 2187 | POSTCODE_SEVERITY_ERR); |
| 2188 | return; |
| 2189 | } |
| 2190 | |
| 2191 | /* read create device message for storage device */ |
| 2192 | if (visorchannel_read(ControlVm_channel, |
| 2193 | localSavedCrashMsgOffset + |
| 2194 | sizeof(CONTROLVM_MESSAGE), |
| 2195 | &localCrashCreateDevMsg, |
| 2196 | sizeof(CONTROLVM_MESSAGE)) < 0) { |
| 2197 | LOGERR("CRASH_DEV_RD_DEV_FAIULRE: Failed to read CrashCreateDevMsg!"); |
| 2198 | POSTCODE_LINUX_2(CRASH_DEV_RD_DEV_FAIULRE_PC, |
| 2199 | POSTCODE_SEVERITY_ERR); |
| 2200 | return; |
| 2201 | } |
| 2202 | |
| 2203 | /* reuse IOVM create bus message */ |
| 2204 | if (localCrashCreateBusMsg.cmd.createBus.channelAddr != 0) |
| 2205 | bus_create(&localCrashCreateBusMsg); |
| 2206 | else { |
| 2207 | LOGERR("CrashCreateBusMsg is null, no dump will be taken"); |
| 2208 | POSTCODE_LINUX_2(CRASH_DEV_BUS_NULL_FAILURE_PC, |
| 2209 | POSTCODE_SEVERITY_ERR); |
| 2210 | return; |
| 2211 | } |
| 2212 | |
| 2213 | /* reuse create device message for storage device */ |
| 2214 | if (localCrashCreateDevMsg.cmd.createDevice.channelAddr != 0) |
| 2215 | my_device_create(&localCrashCreateDevMsg); |
| 2216 | else { |
| 2217 | LOGERR("CrashCreateDevMsg is null, no dump will be taken"); |
| 2218 | POSTCODE_LINUX_2(CRASH_DEV_DEV_NULL_FAILURE_PC, |
| 2219 | POSTCODE_SEVERITY_ERR); |
| 2220 | return; |
| 2221 | } |
| 2222 | LOGINF("Bus and device ready for dumping"); |
| 2223 | POSTCODE_LINUX_2(CRASH_DEV_EXIT_PC, POSTCODE_SEVERITY_INFO); |
| 2224 | return; |
| 2225 | |
| 2226 | Away: |
| 2227 | |
| 2228 | Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_SLOW; |
| 2229 | |
| 2230 | queue_delayed_work(Periodic_controlvm_workqueue, |
| 2231 | &Periodic_controlvm_work, Poll_jiffies); |
| 2232 | } |
| 2233 | |
| 2234 | static void |
| 2235 | bus_create_response(ulong busNo, int response) |
| 2236 | { |
| 2237 | bus_responder(CONTROLVM_BUS_CREATE, busNo, response); |
| 2238 | } |
| 2239 | |
| 2240 | static void |
| 2241 | bus_destroy_response(ulong busNo, int response) |
| 2242 | { |
| 2243 | bus_responder(CONTROLVM_BUS_DESTROY, busNo, response); |
| 2244 | } |
| 2245 | |
| 2246 | static void |
| 2247 | device_create_response(ulong busNo, ulong devNo, int response) |
| 2248 | { |
| 2249 | device_responder(CONTROLVM_DEVICE_CREATE, busNo, devNo, response); |
| 2250 | } |
| 2251 | |
| 2252 | static void |
| 2253 | device_destroy_response(ulong busNo, ulong devNo, int response) |
| 2254 | { |
| 2255 | device_responder(CONTROLVM_DEVICE_DESTROY, busNo, devNo, response); |
| 2256 | } |
| 2257 | |
| 2258 | void |
| 2259 | visorchipset_device_pause_response(ulong busNo, ulong devNo, int response) |
| 2260 | { |
| 2261 | |
| 2262 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
| 2263 | busNo, devNo, response, |
| 2264 | SegmentStateStandby); |
| 2265 | } |
| 2266 | EXPORT_SYMBOL_GPL(visorchipset_device_pause_response); |
| 2267 | |
| 2268 | static void |
| 2269 | device_resume_response(ulong busNo, ulong devNo, int response) |
| 2270 | { |
| 2271 | device_changestate_responder(CONTROLVM_DEVICE_CHANGESTATE, |
| 2272 | busNo, devNo, response, |
| 2273 | SegmentStateRunning); |
| 2274 | } |
| 2275 | |
| 2276 | BOOL |
| 2277 | visorchipset_get_bus_info(ulong busNo, VISORCHIPSET_BUS_INFO *busInfo) |
| 2278 | { |
| 2279 | void *p = findbus(&BusInfoList, busNo); |
| 2280 | if (!p) { |
| 2281 | LOGERR("(%lu) failed", busNo); |
| 2282 | return FALSE; |
| 2283 | } |
| 2284 | memcpy(busInfo, p, sizeof(VISORCHIPSET_BUS_INFO)); |
| 2285 | return TRUE; |
| 2286 | } |
| 2287 | EXPORT_SYMBOL_GPL(visorchipset_get_bus_info); |
| 2288 | |
| 2289 | BOOL |
| 2290 | visorchipset_set_bus_context(ulong busNo, void *context) |
| 2291 | { |
| 2292 | VISORCHIPSET_BUS_INFO *p = findbus(&BusInfoList, busNo); |
| 2293 | if (!p) { |
| 2294 | LOGERR("(%lu) failed", busNo); |
| 2295 | return FALSE; |
| 2296 | } |
| 2297 | p->bus_driver_context = context; |
| 2298 | return TRUE; |
| 2299 | } |
| 2300 | EXPORT_SYMBOL_GPL(visorchipset_set_bus_context); |
| 2301 | |
| 2302 | BOOL |
| 2303 | visorchipset_get_device_info(ulong busNo, ulong devNo, |
| 2304 | VISORCHIPSET_DEVICE_INFO *devInfo) |
| 2305 | { |
| 2306 | void *p = finddevice(&DevInfoList, busNo, devNo); |
| 2307 | if (!p) { |
| 2308 | LOGERR("(%lu,%lu) failed", busNo, devNo); |
| 2309 | return FALSE; |
| 2310 | } |
| 2311 | memcpy(devInfo, p, sizeof(VISORCHIPSET_DEVICE_INFO)); |
| 2312 | return TRUE; |
| 2313 | } |
| 2314 | EXPORT_SYMBOL_GPL(visorchipset_get_device_info); |
| 2315 | |
| 2316 | BOOL |
| 2317 | visorchipset_set_device_context(ulong busNo, ulong devNo, void *context) |
| 2318 | { |
| 2319 | VISORCHIPSET_DEVICE_INFO *p = finddevice(&DevInfoList, busNo, devNo); |
| 2320 | if (!p) { |
| 2321 | LOGERR("(%lu,%lu) failed", busNo, devNo); |
| 2322 | return FALSE; |
| 2323 | } |
| 2324 | p->bus_driver_context = context; |
| 2325 | return TRUE; |
| 2326 | } |
| 2327 | EXPORT_SYMBOL_GPL(visorchipset_set_device_context); |
| 2328 | |
| 2329 | /* Generic wrapper function for allocating memory from a kmem_cache pool. |
| 2330 | */ |
| 2331 | void * |
| 2332 | visorchipset_cache_alloc(struct kmem_cache *pool, BOOL ok_to_block, |
| 2333 | char *fn, int ln) |
| 2334 | { |
| 2335 | gfp_t gfp; |
| 2336 | void *p; |
| 2337 | |
| 2338 | if (ok_to_block) |
| 2339 | gfp = GFP_KERNEL; |
| 2340 | else |
| 2341 | gfp = GFP_ATOMIC; |
| 2342 | /* __GFP_NORETRY means "ok to fail", meaning |
| 2343 | * kmem_cache_alloc() can return NULL, implying the caller CAN |
| 2344 | * cope with failure. If you do NOT specify __GFP_NORETRY, |
| 2345 | * Linux will go to extreme measures to get memory for you |
| 2346 | * (like, invoke oom killer), which will probably cripple the |
| 2347 | * system. |
| 2348 | */ |
| 2349 | gfp |= __GFP_NORETRY; |
| 2350 | p = kmem_cache_alloc(pool, gfp); |
| 2351 | if (!p) { |
| 2352 | LOGERR("kmem_cache_alloc failed early @%s:%d\n", fn, ln); |
| 2353 | return NULL; |
| 2354 | } |
| 2355 | atomic_inc(&Visorchipset_cache_buffers_in_use); |
| 2356 | return p; |
| 2357 | } |
| 2358 | |
| 2359 | /* Generic wrapper function for freeing memory from a kmem_cache pool. |
| 2360 | */ |
| 2361 | void |
| 2362 | visorchipset_cache_free(struct kmem_cache *pool, void *p, char *fn, int ln) |
| 2363 | { |
| 2364 | if (!p) { |
| 2365 | LOGERR("NULL pointer @%s:%d\n", fn, ln); |
| 2366 | return; |
| 2367 | } |
| 2368 | atomic_dec(&Visorchipset_cache_buffers_in_use); |
| 2369 | kmem_cache_free(pool, p); |
| 2370 | } |
| 2371 | |
| 2372 | #define gettoken(bufp) strsep(bufp, " -\t\n") |
| 2373 | |
| 2374 | static ssize_t |
| 2375 | chipset_proc_write(struct file *file, const char __user *buffer, |
| 2376 | size_t count, loff_t *ppos) |
| 2377 | { |
| 2378 | char buf[512]; |
| 2379 | char *token, *p; |
| 2380 | |
| 2381 | if (count > sizeof(buf) - 1) { |
| 2382 | LOGERR("chipset_proc_write: count (%d) exceeds size of buffer (%d)", |
| 2383 | (int) count, (int) sizeof(buffer)); |
| 2384 | return -EINVAL; |
| 2385 | } |
| 2386 | if (copy_from_user(buf, buffer, count)) { |
| 2387 | LOGERR("chipset_proc_write: copy_from_user failed"); |
| 2388 | return -EFAULT; |
| 2389 | } |
| 2390 | buf[count] = '\0'; |
| 2391 | |
| 2392 | p = buf; |
| 2393 | token = gettoken(&p); |
| 2394 | |
| 2395 | if (strcmp(token, "CALLHOMEDISK_MOUNTED") == 0) { |
| 2396 | token = gettoken(&p); |
| 2397 | /* The Call Home Disk has been mounted */ |
| 2398 | if (strcmp(token, "0") == 0) |
| 2399 | chipset_events[0] = 1; |
| 2400 | } else if (strcmp(token, "MODULES_LOADED") == 0) { |
| 2401 | token = gettoken(&p); |
| 2402 | /* All modules for the partition have been loaded */ |
| 2403 | if (strcmp(token, "0") == 0) |
| 2404 | chipset_events[1] = 1; |
| 2405 | } else if (token == NULL) { |
| 2406 | /* No event specified */ |
| 2407 | LOGERR("No event was specified to send CHIPSET_READY response"); |
| 2408 | return -1; |
| 2409 | } else { |
| 2410 | /* Unsupported event specified */ |
| 2411 | LOGERR("%s is an invalid event for sending CHIPSET_READY response", token); |
| 2412 | return -1; |
| 2413 | } |
| 2414 | |
| 2415 | return count; |
| 2416 | } |
| 2417 | |
| 2418 | static ssize_t |
| 2419 | visorchipset_proc_read_writeonly(struct file *file, char __user *buf, |
| 2420 | size_t len, loff_t *offset) |
| 2421 | { |
| 2422 | return 0; |
| 2423 | } |
| 2424 | |
| 2425 | static const struct file_operations chipset_proc_fops = { |
| 2426 | .owner = THIS_MODULE, |
| 2427 | .read = visorchipset_proc_read_writeonly, |
| 2428 | .write = chipset_proc_write, |
| 2429 | }; |
| 2430 | |
| 2431 | static int __init |
| 2432 | visorchipset_init(void) |
| 2433 | { |
| 2434 | int rc = 0, x = 0; |
| 2435 | char s[64]; |
| 2436 | HOSTADDRESS addr; |
| 2437 | |
| 2438 | if (!unisys_spar_platform) |
| 2439 | return -ENODEV; |
| 2440 | |
| 2441 | LOGINF("chipset driver version %s loaded", VERSION); |
| 2442 | /* process module options */ |
| 2443 | POSTCODE_LINUX_2(DRIVER_ENTRY_PC, POSTCODE_SEVERITY_INFO); |
| 2444 | |
| 2445 | LOGINF("option - testvnic=%d", visorchipset_testvnic); |
| 2446 | LOGINF("option - testvnicclient=%d", visorchipset_testvnicclient); |
| 2447 | LOGINF("option - testmsg=%d", visorchipset_testmsg); |
| 2448 | LOGINF("option - testteardown=%d", visorchipset_testteardown); |
| 2449 | LOGINF("option - major=%d", visorchipset_major); |
| 2450 | LOGINF("option - serverregwait=%d", visorchipset_serverregwait); |
| 2451 | LOGINF("option - clientregwait=%d", visorchipset_clientregwait); |
| 2452 | LOGINF("option - holdchipsetready=%d", visorchipset_holdchipsetready); |
| 2453 | |
| 2454 | memset(&BusDev_Server_Notifiers, 0, sizeof(BusDev_Server_Notifiers)); |
| 2455 | memset(&BusDev_Client_Notifiers, 0, sizeof(BusDev_Client_Notifiers)); |
| 2456 | memset(&ControlVm_payload_info, 0, sizeof(ControlVm_payload_info)); |
| 2457 | memset(&LiveDump_info, 0, sizeof(LiveDump_info)); |
| 2458 | atomic_set(&LiveDump_info.buffers_in_use, 0); |
| 2459 | |
| 2460 | if (visorchipset_testvnic) { |
| 2461 | ERRDRV("testvnic option no longer supported: (status = %d)\n", |
| 2462 | x); |
| 2463 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, x, DIAG_SEVERITY_ERR); |
| 2464 | rc = x; |
| 2465 | goto Away; |
| 2466 | } |
| 2467 | |
| 2468 | addr = controlvm_get_channel_address(); |
| 2469 | if (addr != 0) { |
| 2470 | ControlVm_channel = |
| 2471 | visorchannel_create_with_lock |
| 2472 | (addr, |
| 2473 | sizeof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL), |
| 2474 | UltraControlvmChannelProtocolGuid); |
| 2475 | if (ULTRA_CONTROLVM_CHANNEL_OK_CLIENT |
| 2476 | (visorchannel_get_header(ControlVm_channel), |
| 2477 | NULL)) { |
| 2478 | LOGINF("Channel %s (ControlVm) discovered", |
| 2479 | visorchannel_id(ControlVm_channel, s)); |
| 2480 | initialize_controlvm_payload(); |
| 2481 | } else { |
| 2482 | LOGERR("controlvm channel is invalid"); |
| 2483 | visorchannel_destroy(ControlVm_channel); |
| 2484 | ControlVm_channel = NULL; |
| 2485 | return -ENODEV; |
| 2486 | } |
| 2487 | } else { |
| 2488 | LOGERR("no controlvm channel discovered"); |
| 2489 | return -ENODEV; |
| 2490 | } |
| 2491 | |
| 2492 | MajorDev = MKDEV(visorchipset_major, 0); |
| 2493 | rc = visorchipset_file_init(MajorDev, &ControlVm_channel); |
| 2494 | if (rc < 0) { |
| 2495 | ERRDRV("visorchipset_file_init(MajorDev, &ControlVm_channel): error (status=%d)\n", rc); |
| 2496 | POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); |
| 2497 | goto Away; |
| 2498 | } |
| 2499 | |
| 2500 | proc_Init(); |
| 2501 | memset(PartitionPropertyNames, 0, sizeof(PartitionPropertyNames)); |
| 2502 | InitPartitionProperties(); |
| 2503 | |
| 2504 | PartitionType = visor_proc_CreateType(ProcDir, PartitionTypeNames, |
| 2505 | (const char **) |
| 2506 | PartitionPropertyNames, |
| 2507 | &show_partition_property); |
| 2508 | |
| 2509 | memset(&g_DiagMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 2510 | |
| 2511 | chipset_proc_dir = proc_create(VISORCHIPSET_CHIPSET_PROC_ENTRY_FN, |
| 2512 | 0644, ProcDir, &chipset_proc_fops); |
| 2513 | memset(&g_ChipSetMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 2514 | |
| 2515 | parahotplug_proc_dir = |
| 2516 | proc_create(VISORCHIPSET_PARAHOTPLUG_PROC_ENTRY_FN, 0200, |
| 2517 | ProcDir, ¶hotplug_proc_fops); |
| 2518 | memset(&g_DelDumpMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 2519 | |
| 2520 | Putfile_buffer_list_pool = |
| 2521 | kmem_cache_create(Putfile_buffer_list_pool_name, |
| 2522 | sizeof(struct putfile_buffer_entry), |
| 2523 | 0, SLAB_HWCACHE_ALIGN, NULL); |
| 2524 | if (!Putfile_buffer_list_pool) { |
| 2525 | ERRDRV("failed to alloc Putfile_buffer_list_pool: (status=-1)\n"); |
| 2526 | POSTCODE_LINUX_2(CHIPSET_INIT_FAILURE_PC, DIAG_SEVERITY_ERR); |
| 2527 | rc = -1; |
| 2528 | goto Away; |
| 2529 | } |
| 2530 | if (visorchipset_disable_controlvm) { |
| 2531 | LOGINF("visorchipset_init:controlvm disabled"); |
| 2532 | } else { |
| 2533 | /* if booting in a crash kernel */ |
| 2534 | if (visorchipset_crash_kernel) |
| 2535 | INIT_DELAYED_WORK(&Periodic_controlvm_work, |
| 2536 | setup_crash_devices_work_queue); |
| 2537 | else |
| 2538 | INIT_DELAYED_WORK(&Periodic_controlvm_work, |
| 2539 | controlvm_periodic_work); |
| 2540 | Periodic_controlvm_workqueue = |
| 2541 | create_singlethread_workqueue("visorchipset_controlvm"); |
| 2542 | |
| 2543 | if (Periodic_controlvm_workqueue == NULL) { |
| 2544 | ERRDRV("cannot create controlvm workqueue: (status=%d)\n", |
| 2545 | -ENOMEM); |
| 2546 | POSTCODE_LINUX_2(CREATE_WORKQUEUE_FAILED_PC, |
| 2547 | DIAG_SEVERITY_ERR); |
| 2548 | rc = -ENOMEM; |
| 2549 | goto Away; |
| 2550 | } |
| 2551 | Most_recent_message_jiffies = jiffies; |
| 2552 | Poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST; |
| 2553 | rc = queue_delayed_work(Periodic_controlvm_workqueue, |
| 2554 | &Periodic_controlvm_work, Poll_jiffies); |
| 2555 | if (rc < 0) { |
| 2556 | ERRDRV("queue_delayed_work(Periodic_controlvm_workqueue, &Periodic_controlvm_work, Poll_jiffies): error (status=%d)\n", rc); |
| 2557 | POSTCODE_LINUX_2(QUEUE_DELAYED_WORK_PC, |
| 2558 | DIAG_SEVERITY_ERR); |
| 2559 | goto Away; |
| 2560 | } |
| 2561 | |
| 2562 | } |
| 2563 | |
| 2564 | Visorchipset_platform_device.dev.devt = MajorDev; |
| 2565 | if (platform_device_register(&Visorchipset_platform_device) < 0) { |
| 2566 | ERRDRV("platform_device_register(visorchipset) failed: (status=-1)\n"); |
| 2567 | POSTCODE_LINUX_2(DEVICE_REGISTER_FAILURE_PC, DIAG_SEVERITY_ERR); |
| 2568 | rc = -1; |
| 2569 | goto Away; |
| 2570 | } |
| 2571 | LOGINF("visorchipset device created"); |
| 2572 | POSTCODE_LINUX_2(CHIPSET_INIT_SUCCESS_PC, POSTCODE_SEVERITY_INFO); |
| 2573 | rc = 0; |
| 2574 | Away: |
| 2575 | if (rc) { |
| 2576 | LOGERR("visorchipset_init failed"); |
| 2577 | POSTCODE_LINUX_3(CHIPSET_INIT_FAILURE_PC, rc, |
| 2578 | POSTCODE_SEVERITY_ERR); |
| 2579 | } |
| 2580 | return rc; |
| 2581 | } |
| 2582 | |
| 2583 | static void |
| 2584 | visorchipset_exit(void) |
| 2585 | { |
| 2586 | char s[99]; |
| 2587 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
| 2588 | |
| 2589 | if (visorchipset_disable_controlvm) { |
| 2590 | ; |
| 2591 | } else { |
| 2592 | cancel_delayed_work(&Periodic_controlvm_work); |
| 2593 | flush_workqueue(Periodic_controlvm_workqueue); |
| 2594 | destroy_workqueue(Periodic_controlvm_workqueue); |
| 2595 | Periodic_controlvm_workqueue = NULL; |
| 2596 | destroy_controlvm_payload_info(&ControlVm_payload_info); |
| 2597 | } |
| 2598 | Test_Vnic_channel = NULL; |
| 2599 | if (Putfile_buffer_list_pool) { |
| 2600 | kmem_cache_destroy(Putfile_buffer_list_pool); |
| 2601 | Putfile_buffer_list_pool = NULL; |
| 2602 | } |
| 2603 | |
| 2604 | cleanup_controlvm_structures(); |
| 2605 | |
| 2606 | if (PartitionType) { |
| 2607 | visor_proc_DestroyType(PartitionType); |
| 2608 | PartitionType = NULL; |
| 2609 | } |
| 2610 | if (diag_proc_dir) { |
| 2611 | remove_proc_entry(VISORCHIPSET_DIAG_PROC_ENTRY_FN, ProcDir); |
| 2612 | diag_proc_dir = NULL; |
| 2613 | } |
| 2614 | memset(&g_DiagMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 2615 | |
| 2616 | if (chipset_proc_dir) { |
| 2617 | remove_proc_entry(VISORCHIPSET_CHIPSET_PROC_ENTRY_FN, ProcDir); |
| 2618 | chipset_proc_dir = NULL; |
| 2619 | } |
| 2620 | memset(&g_ChipSetMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 2621 | |
| 2622 | if (parahotplug_proc_dir) { |
| 2623 | remove_proc_entry(VISORCHIPSET_PARAHOTPLUG_PROC_ENTRY_FN, |
| 2624 | ProcDir); |
| 2625 | parahotplug_proc_dir = NULL; |
| 2626 | } |
| 2627 | |
| 2628 | memset(&g_DelDumpMsgHdr, 0, sizeof(CONTROLVM_MESSAGE_HEADER)); |
| 2629 | |
| 2630 | proc_DeInit(); |
| 2631 | LOGINF("Channel %s (ControlVm) disconnected", |
| 2632 | visorchannel_id(ControlVm_channel, s)); |
| 2633 | visorchannel_destroy(ControlVm_channel); |
| 2634 | |
| 2635 | visorchipset_file_cleanup(); |
| 2636 | POSTCODE_LINUX_2(DRIVER_EXIT_PC, POSTCODE_SEVERITY_INFO); |
| 2637 | LOGINF("chipset driver unloaded"); |
| 2638 | } |
| 2639 | |
| 2640 | module_param_named(testvnic, visorchipset_testvnic, int, S_IRUGO); |
| 2641 | MODULE_PARM_DESC(visorchipset_testvnic, "1 to test vnic, using dummy VNIC connected via a loopback to a physical ethernet"); |
| 2642 | int visorchipset_testvnic = 0; |
| 2643 | |
| 2644 | module_param_named(testvnicclient, visorchipset_testvnicclient, int, S_IRUGO); |
| 2645 | MODULE_PARM_DESC(visorchipset_testvnicclient, "1 to test vnic, using real VNIC channel attached to a separate IOVM guest"); |
| 2646 | int visorchipset_testvnicclient = 0; |
| 2647 | |
| 2648 | module_param_named(testmsg, visorchipset_testmsg, int, S_IRUGO); |
| 2649 | MODULE_PARM_DESC(visorchipset_testmsg, |
| 2650 | "1 to manufacture the chipset, bus, and switch messages"); |
| 2651 | int visorchipset_testmsg = 0; |
| 2652 | |
| 2653 | module_param_named(major, visorchipset_major, int, S_IRUGO); |
| 2654 | MODULE_PARM_DESC(visorchipset_major, "major device number to use for the device node"); |
| 2655 | int visorchipset_major = 0; |
| 2656 | |
| 2657 | module_param_named(serverregwait, visorchipset_serverregwait, int, S_IRUGO); |
| 2658 | MODULE_PARM_DESC(visorchipset_serverreqwait, |
| 2659 | "1 to have the module wait for the visor bus to register"); |
| 2660 | int visorchipset_serverregwait = 0; /* default is off */ |
| 2661 | module_param_named(clientregwait, visorchipset_clientregwait, int, S_IRUGO); |
| 2662 | MODULE_PARM_DESC(visorchipset_clientregwait, "1 to have the module wait for the visorclientbus to register"); |
| 2663 | int visorchipset_clientregwait = 1; /* default is on */ |
| 2664 | module_param_named(testteardown, visorchipset_testteardown, int, S_IRUGO); |
| 2665 | MODULE_PARM_DESC(visorchipset_testteardown, |
| 2666 | "1 to test teardown of the chipset, bus, and switch"); |
| 2667 | int visorchipset_testteardown = 0; /* default is off */ |
| 2668 | module_param_named(disable_controlvm, visorchipset_disable_controlvm, int, |
| 2669 | S_IRUGO); |
| 2670 | MODULE_PARM_DESC(visorchipset_disable_controlvm, |
| 2671 | "1 to disable polling of controlVm channel"); |
| 2672 | int visorchipset_disable_controlvm = 0; /* default is off */ |
| 2673 | module_param_named(crash_kernel, visorchipset_crash_kernel, int, S_IRUGO); |
| 2674 | MODULE_PARM_DESC(visorchipset_crash_kernel, |
| 2675 | "1 means we are running in crash kernel"); |
| 2676 | int visorchipset_crash_kernel = 0; /* default is running in non-crash kernel */ |
| 2677 | module_param_named(holdchipsetready, visorchipset_holdchipsetready, |
| 2678 | int, S_IRUGO); |
| 2679 | MODULE_PARM_DESC(visorchipset_holdchipsetready, |
| 2680 | "1 to hold response to CHIPSET_READY"); |
| 2681 | int visorchipset_holdchipsetready = 0; /* default is to send CHIPSET_READY |
| 2682 | * response immediately */ |
| 2683 | module_init(visorchipset_init); |
| 2684 | module_exit(visorchipset_exit); |
| 2685 | |
| 2686 | MODULE_AUTHOR("Unisys"); |
| 2687 | MODULE_LICENSE("GPL"); |
| 2688 | MODULE_DESCRIPTION("Supervisor chipset driver for service partition: ver " |
| 2689 | VERSION); |
| 2690 | MODULE_VERSION(VERSION); |