Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 1 | // SPDX-License-Identifier: Apache-2.0 |
| 2 | // Copyright (C) 2018 IBM Corp. |
| 3 | #include "config.h" |
| 4 | |
| 5 | #include <errno.h> |
| 6 | #include <stdint.h> |
| 7 | |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 8 | #include "common.h" |
Andrew Jeffery | c48d070 | 2018-08-09 14:04:27 +0930 | [diff] [blame] | 9 | #include "flash.h" |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 10 | #include "mbox.h" |
| 11 | #include "lpc.h" |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 12 | #include "windows.h" |
| 13 | |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 14 | /* |
| 15 | * protocol_events_set() - Set BMC events |
| 16 | * @context: The mbox context pointer |
| 17 | * @bmc_event: The bits to set |
| 18 | * @write_back: Whether to write back to the register -> will interrupt host |
| 19 | * |
| 20 | * Return: 0 on success otherwise negative error code |
| 21 | */ |
| 22 | int protocol_events_set(struct mbox_context *context, uint8_t bmc_event, |
| 23 | bool write_back) |
| 24 | { |
| 25 | uint8_t mask = 0x00; |
| 26 | |
| 27 | switch (context->version) { |
| 28 | case API_VERSION_1: |
| 29 | mask = BMC_EVENT_V1_MASK; |
| 30 | break; |
| 31 | default: |
| 32 | mask = BMC_EVENT_V2_MASK; |
| 33 | break; |
| 34 | } |
| 35 | |
| 36 | context->bmc_events |= (bmc_event & mask); |
| 37 | MSG_DBG("BMC Events set to: 0x%.2x\n", context->bmc_events); |
| 38 | |
| 39 | return write_back ? context->transport->flush_events(context) : 0; |
| 40 | } |
| 41 | |
| 42 | /* |
| 43 | * protocol_events_clear() - Clear BMC events |
| 44 | * @context: The mbox context pointer |
| 45 | * @bmc_event: The bits to clear |
| 46 | * @write_back: Whether to write back to the register -> will interrupt host |
| 47 | * |
| 48 | * Return: 0 on success otherwise negative error code |
| 49 | */ |
| 50 | int protocol_events_clear(struct mbox_context *context, uint8_t bmc_event, |
| 51 | bool write_back) |
| 52 | { |
| 53 | context->bmc_events &= ~bmc_event; |
| 54 | MSG_DBG("BMC Events clear to: 0x%.2x\n", context->bmc_events); |
| 55 | |
| 56 | return write_back ? context->transport->flush_events(context) : 0; |
| 57 | } |
| 58 | |
Andrew Jeffery | ab666a5 | 2018-08-07 14:28:09 +0930 | [diff] [blame] | 59 | int protocol_v1_reset(struct mbox_context *context) |
| 60 | { |
| 61 | /* Host requested it -> No BMC Event */ |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 62 | windows_reset_all(context, EVENT_SUPPRESS); |
Andrew Jeffery | ab666a5 | 2018-08-07 14:28:09 +0930 | [diff] [blame] | 63 | return lpc_reset(context); |
| 64 | } |
| 65 | |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 66 | int protocol_v1_get_info(struct mbox_context *context, |
| 67 | struct protocol_get_info *io) |
| 68 | { |
| 69 | uint8_t old_version = context->version; |
| 70 | int rc; |
| 71 | |
| 72 | /* Bootstrap protocol version. This may involve {up,down}grading */ |
| 73 | rc = protocol_negotiate_version(context, io->req.api_version); |
| 74 | if (rc < 0) |
| 75 | return rc; |
| 76 | |
| 77 | /* Do the {up,down}grade if necessary*/ |
| 78 | if (rc != old_version) { |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 79 | windows_reset_all(context, EVENT_TRIGGER); |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 80 | return context->protocol->get_info(context, io); |
| 81 | } |
| 82 | |
| 83 | /* Record the negotiated version for the response */ |
| 84 | io->resp.api_version = rc; |
| 85 | |
| 86 | /* Now do all required intialisation for v1 */ |
| 87 | context->block_size_shift = BLOCK_SIZE_SHIFT_V1; |
| 88 | MSG_INFO("Block Size: 0x%.8x (shift: %u)\n", |
| 89 | 1 << context->block_size_shift, context->block_size_shift); |
| 90 | |
| 91 | /* Knowing blocksize we can allocate the window dirty_bytemap */ |
| 92 | windows_alloc_dirty_bytemap(context); |
| 93 | |
| 94 | io->resp.v1.read_window_size = |
| 95 | context->windows.default_size >> context->block_size_shift; |
| 96 | io->resp.v1.write_window_size = |
| 97 | context->windows.default_size >> context->block_size_shift; |
| 98 | |
| 99 | return lpc_map_memory(context); |
| 100 | } |
| 101 | |
Andrew Jeffery | 91a8745 | 2018-08-07 14:54:14 +0930 | [diff] [blame] | 102 | int protocol_v1_get_flash_info(struct mbox_context *context, |
| 103 | struct protocol_get_flash_info *io) |
| 104 | { |
| 105 | io->resp.v1.flash_size = context->flash_size; |
| 106 | io->resp.v1.erase_size = context->mtd_info.erasesize; |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 111 | /* |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 112 | * get_lpc_addr_shifted() - Get lpc address of the current window |
| 113 | * @context: The mbox context pointer |
| 114 | * |
| 115 | * Return: The lpc address to access that offset shifted by block size |
| 116 | */ |
| 117 | static inline uint16_t get_lpc_addr_shifted(struct mbox_context *context) |
| 118 | { |
| 119 | uint32_t lpc_addr, mem_offset; |
| 120 | |
| 121 | /* Offset of the current window in the reserved memory region */ |
| 122 | mem_offset = context->current->mem - context->mem; |
| 123 | /* Total LPC Address */ |
| 124 | lpc_addr = context->lpc_base + mem_offset; |
| 125 | |
| 126 | MSG_DBG("LPC address of current window: 0x%.8x\n", lpc_addr); |
| 127 | |
| 128 | return lpc_addr >> context->block_size_shift; |
| 129 | } |
| 130 | |
Andrew Jeffery | 4bcec8e | 2018-08-07 15:33:41 +0930 | [diff] [blame] | 131 | int protocol_v1_create_window(struct mbox_context *context, |
| 132 | struct protocol_create_window *io) |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 133 | { |
| 134 | int rc; |
| 135 | uint32_t offset = io->req.offset << context->block_size_shift; |
| 136 | |
| 137 | /* Close the current window if there is one */ |
| 138 | if (context->current) { |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 139 | /* There is an implicit flush if it was a write window |
| 140 | * |
| 141 | * protocol_v2_create_window() calls |
| 142 | * protocol_v1_create_window(), so use indirect call to |
| 143 | * write_flush() to make sure we pick the right one. |
| 144 | */ |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 145 | if (context->current_is_write) { |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 146 | rc = context->protocol->flush(context, NULL); |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 147 | if (rc < 0) { |
| 148 | MSG_ERR("Couldn't Flush Write Window\n"); |
| 149 | return rc; |
| 150 | } |
| 151 | } |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 152 | windows_close_current(context, EVENT_SUPPRESS, FLAGS_NONE); |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /* Offset the host has requested */ |
| 156 | MSG_INFO("Host requested flash @ 0x%.8x\n", offset); |
| 157 | /* Check if we have an existing window */ |
| 158 | context->current = windows_search(context, offset, |
| 159 | context->version == API_VERSION_1); |
| 160 | |
| 161 | if (!context->current) { /* No existing window */ |
| 162 | MSG_DBG("No existing window which maps that flash offset\n"); |
| 163 | rc = windows_create_map(context, &context->current, |
| 164 | offset, |
| 165 | context->version == API_VERSION_1); |
| 166 | if (rc < 0) { /* Unable to map offset */ |
| 167 | MSG_ERR("Couldn't create window mapping for offset 0x%.8x\n", |
Andrew Jeffery | 4bcec8e | 2018-08-07 15:33:41 +0930 | [diff] [blame] | 168 | offset); |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 169 | return rc; |
| 170 | } |
| 171 | } |
| 172 | |
Andrew Jeffery | 4bcec8e | 2018-08-07 15:33:41 +0930 | [diff] [blame] | 173 | context->current_is_write = !io->req.ro; |
| 174 | |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 175 | MSG_INFO("Window @ %p for size 0x%.8x maps flash offset 0x%.8x\n", |
| 176 | context->current->mem, context->current->size, |
| 177 | context->current->flash_offset); |
| 178 | |
| 179 | io->resp.lpc_address = get_lpc_addr_shifted(context); |
| 180 | |
| 181 | return 0; |
| 182 | } |
| 183 | |
Andrew Jeffery | a336e43 | 2018-08-07 16:00:40 +0930 | [diff] [blame] | 184 | int protocol_v1_mark_dirty(struct mbox_context *context, |
| 185 | struct protocol_mark_dirty *io) |
| 186 | { |
| 187 | uint32_t offset = io->req.v1.offset; |
| 188 | uint32_t size = io->req.v1.size; |
| 189 | uint32_t off; |
| 190 | |
| 191 | if (!(context->current && context->current_is_write)) { |
| 192 | MSG_ERR("Tried to call mark dirty without open write window\n"); |
| 193 | return -EPERM; |
| 194 | } |
| 195 | |
| 196 | /* For V1 offset given relative to flash - we want the window */ |
| 197 | off = offset - ((context->current->flash_offset) >> |
| 198 | context->block_size_shift); |
| 199 | if (off > offset) { /* Underflow - before current window */ |
| 200 | MSG_ERR("Tried to mark dirty before start of window\n"); |
| 201 | MSG_ERR("requested offset: 0x%x window start: 0x%x\n", |
| 202 | offset << context->block_size_shift, |
| 203 | context->current->flash_offset); |
| 204 | return -EINVAL; |
| 205 | } |
| 206 | offset = off; |
| 207 | /* |
| 208 | * We only track dirty at the block level. |
| 209 | * For protocol V1 we can get away with just marking the whole |
| 210 | * block dirty. |
| 211 | */ |
| 212 | size = align_up(size, 1 << context->block_size_shift); |
| 213 | size >>= context->block_size_shift; |
| 214 | |
| 215 | MSG_INFO("Dirty window @ 0x%.8x for 0x%.8x\n", |
| 216 | offset << context->block_size_shift, |
| 217 | size << context->block_size_shift); |
| 218 | |
| 219 | return window_set_bytemap(context, context->current, offset, size, |
| 220 | WINDOW_DIRTY); |
| 221 | } |
| 222 | |
Andrew Jeffery | 9b920cf | 2018-08-07 22:49:19 +0930 | [diff] [blame] | 223 | static int generic_flush(struct mbox_context *context) |
| 224 | { |
| 225 | int rc, i, offset, count; |
| 226 | uint8_t prev; |
| 227 | |
| 228 | offset = 0; |
| 229 | count = 0; |
| 230 | prev = WINDOW_CLEAN; |
| 231 | |
| 232 | MSG_INFO("Flush window @ %p for size 0x%.8x which maps flash @ 0x%.8x\n", |
| 233 | context->current->mem, context->current->size, |
| 234 | context->current->flash_offset); |
| 235 | |
| 236 | /* |
| 237 | * We look for streaks of the same type and keep a count, when the type |
| 238 | * (dirty/erased) changes we perform the required action on the backing |
| 239 | * store and update the current streak-type |
| 240 | */ |
| 241 | for (i = 0; i < (context->current->size >> context->block_size_shift); |
| 242 | i++) { |
| 243 | uint8_t cur = context->current->dirty_bmap[i]; |
| 244 | if (cur != WINDOW_CLEAN) { |
| 245 | if (cur == prev) { /* Same as previous block, incrmnt */ |
| 246 | count++; |
| 247 | } else if (prev == WINDOW_CLEAN) { /* Start of run */ |
| 248 | offset = i; |
| 249 | count++; |
| 250 | } else { /* Change in streak type */ |
| 251 | rc = window_flush(context, offset, count, |
| 252 | prev); |
| 253 | if (rc < 0) { |
| 254 | return rc; |
| 255 | } |
| 256 | offset = i; |
| 257 | count = 1; |
| 258 | } |
| 259 | } else { |
| 260 | if (prev != WINDOW_CLEAN) { /* End of a streak */ |
| 261 | rc = window_flush(context, offset, count, |
| 262 | prev); |
| 263 | if (rc < 0) { |
| 264 | return rc; |
| 265 | } |
| 266 | offset = 0; |
| 267 | count = 0; |
| 268 | } |
| 269 | } |
| 270 | prev = cur; |
| 271 | } |
| 272 | |
| 273 | if (prev != WINDOW_CLEAN) { /* Still the last streak to write */ |
| 274 | rc = window_flush(context, offset, count, prev); |
| 275 | if (rc < 0) { |
| 276 | return rc; |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | /* Clear the dirty bytemap since we have written back all changes */ |
| 281 | return window_set_bytemap(context, context->current, 0, |
| 282 | context->current->size >> |
| 283 | context->block_size_shift, |
| 284 | WINDOW_CLEAN); |
| 285 | } |
| 286 | |
| 287 | int protocol_v1_flush(struct mbox_context *context, struct protocol_flush *io) |
| 288 | { |
| 289 | int rc; |
| 290 | |
| 291 | if (!(context->current && context->current_is_write)) { |
| 292 | MSG_ERR("Tried to call flush without open write window\n"); |
| 293 | return -EPERM; |
| 294 | } |
| 295 | |
| 296 | /* |
| 297 | * For V1 the Flush command acts much the same as the dirty command |
| 298 | * except with a flush as well. Only do this on an actual flush |
| 299 | * command not when we call flush because we've implicitly closed a |
| 300 | * window because we might not have the required args in req. |
| 301 | */ |
Andrew Jeffery | 093eda5 | 2018-08-07 23:10:43 +0930 | [diff] [blame] | 302 | if (io) { |
| 303 | struct protocol_mark_dirty *mdio = (void *)io; |
| 304 | rc = protocol_v1_mark_dirty(context, mdio); |
| 305 | if (rc < 0) { |
| 306 | return rc; |
| 307 | } |
Andrew Jeffery | 9b920cf | 2018-08-07 22:49:19 +0930 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | return generic_flush(context); |
| 311 | } |
| 312 | |
Andrew Jeffery | 093eda5 | 2018-08-07 23:10:43 +0930 | [diff] [blame] | 313 | int protocol_v1_close(struct mbox_context *context, struct protocol_close *io) |
| 314 | { |
| 315 | int rc; |
| 316 | |
| 317 | /* Close the current window if there is one */ |
| 318 | if (!context->current) { |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | /* There is an implicit flush if it was a write window */ |
| 323 | if (context->current_is_write) { |
| 324 | rc = protocol_v1_flush(context, NULL); |
| 325 | if (rc < 0) { |
| 326 | MSG_ERR("Couldn't Flush Write Window\n"); |
| 327 | return rc; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | /* Host asked for it -> Don't set the BMC Event */ |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 332 | windows_close_current(context, EVENT_SUPPRESS, io->req.flags); |
Andrew Jeffery | 093eda5 | 2018-08-07 23:10:43 +0930 | [diff] [blame] | 333 | |
| 334 | return 0; |
| 335 | } |
| 336 | |
Andrew Jeffery | c5c8304 | 2018-08-07 23:22:05 +0930 | [diff] [blame] | 337 | int protocol_v1_ack(struct mbox_context *context, struct protocol_ack *io) |
| 338 | { |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 339 | return protocol_events_clear(context, (io->req.flags & BMC_EVENT_ACK_MASK), |
| 340 | EVENT_TRIGGER); |
Andrew Jeffery | c5c8304 | 2018-08-07 23:22:05 +0930 | [diff] [blame] | 341 | } |
| 342 | |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 343 | /* |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 344 | * get_suggested_timeout() - get the suggested timeout value in seconds |
| 345 | * @context: The mbox context pointer |
| 346 | * |
| 347 | * Return: Suggested timeout in seconds |
| 348 | */ |
| 349 | static uint16_t get_suggested_timeout(struct mbox_context *context) |
| 350 | { |
| 351 | struct window_context *window = windows_find_largest(context); |
| 352 | uint32_t max_size_mb = window ? (window->size >> 20) : 0; |
| 353 | uint16_t ret; |
| 354 | |
| 355 | ret = align_up(max_size_mb * FLASH_ACCESS_MS_PER_MB, 1000) / 1000; |
| 356 | |
| 357 | MSG_DBG("Suggested Timeout: %us, max window size: %uMB, for %dms/MB\n", |
| 358 | ret, max_size_mb, FLASH_ACCESS_MS_PER_MB); |
| 359 | return ret; |
| 360 | } |
| 361 | |
| 362 | int protocol_v2_get_info(struct mbox_context *context, |
| 363 | struct protocol_get_info *io) |
| 364 | { |
| 365 | uint8_t old_version = context->version; |
| 366 | int rc; |
| 367 | |
| 368 | /* Bootstrap protocol version. This may involve {up,down}grading */ |
| 369 | rc = protocol_negotiate_version(context, io->req.api_version); |
| 370 | if (rc < 0) |
| 371 | return rc; |
| 372 | |
| 373 | /* Do the {up,down}grade if necessary*/ |
| 374 | if (rc != old_version) { |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 375 | windows_reset_all(context, EVENT_TRIGGER); |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 376 | return context->protocol->get_info(context, io); |
| 377 | } |
| 378 | |
| 379 | /* Record the negotiated version for the response */ |
| 380 | io->resp.api_version = rc; |
| 381 | |
| 382 | /* Now do all required intialisation for v2 */ |
| 383 | context->block_size_shift = log_2(context->mtd_info.erasesize); |
| 384 | MSG_INFO("Block Size: 0x%.8x (shift: %u)\n", |
| 385 | 1 << context->block_size_shift, context->block_size_shift); |
| 386 | |
| 387 | /* Knowing blocksize we can allocate the window dirty_bytemap */ |
| 388 | windows_alloc_dirty_bytemap(context); |
| 389 | |
| 390 | io->resp.v2.block_size_shift = context->block_size_shift; |
| 391 | io->resp.v2.timeout = get_suggested_timeout(context); |
| 392 | |
| 393 | return lpc_map_memory(context); |
| 394 | } |
| 395 | |
Andrew Jeffery | 91a8745 | 2018-08-07 14:54:14 +0930 | [diff] [blame] | 396 | int protocol_v2_get_flash_info(struct mbox_context *context, |
| 397 | struct protocol_get_flash_info *io) |
| 398 | { |
| 399 | io->resp.v2.flash_size = |
| 400 | context->flash_size >> context->block_size_shift; |
| 401 | io->resp.v2.erase_size = |
| 402 | context->mtd_info.erasesize >> context->block_size_shift; |
| 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | |
Andrew Jeffery | 4bcec8e | 2018-08-07 15:33:41 +0930 | [diff] [blame] | 407 | int protocol_v2_create_window(struct mbox_context *context, |
| 408 | struct protocol_create_window *io) |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 409 | { |
| 410 | int rc; |
| 411 | |
Andrew Jeffery | 4bcec8e | 2018-08-07 15:33:41 +0930 | [diff] [blame] | 412 | rc = protocol_v1_create_window(context, io); |
Andrew Jeffery | 22fa500 | 2018-08-07 15:22:50 +0930 | [diff] [blame] | 413 | if (rc < 0) |
| 414 | return rc; |
| 415 | |
| 416 | io->resp.size = context->current->size >> context->block_size_shift; |
| 417 | io->resp.offset = context->current->flash_offset >> |
| 418 | context->block_size_shift; |
| 419 | |
| 420 | return 0; |
| 421 | } |
| 422 | |
Andrew Jeffery | a336e43 | 2018-08-07 16:00:40 +0930 | [diff] [blame] | 423 | int protocol_v2_mark_dirty(struct mbox_context *context, |
| 424 | struct protocol_mark_dirty *io) |
| 425 | { |
| 426 | if (!(context->current && context->current_is_write)) { |
| 427 | MSG_ERR("Tried to call mark dirty without open write window\n"); |
| 428 | return -EPERM; |
| 429 | } |
| 430 | |
| 431 | MSG_INFO("Dirty window @ 0x%.8x for 0x%.8x\n", |
| 432 | io->req.v2.offset << context->block_size_shift, |
| 433 | io->req.v2.size << context->block_size_shift); |
| 434 | |
| 435 | return window_set_bytemap(context, context->current, io->req.v2.offset, |
| 436 | io->req.v2.size, WINDOW_DIRTY); |
| 437 | } |
| 438 | |
Andrew Jeffery | 62a3daa | 2018-08-07 22:30:32 +0930 | [diff] [blame] | 439 | int protocol_v2_erase(struct mbox_context *context, |
| 440 | struct protocol_erase *io) |
| 441 | { |
| 442 | size_t start, len; |
| 443 | int rc; |
| 444 | |
| 445 | if (!(context->current && context->current_is_write)) { |
| 446 | MSG_ERR("Tried to call erase without open write window\n"); |
| 447 | return -EPERM; |
| 448 | } |
| 449 | |
| 450 | MSG_INFO("Erase window @ 0x%.8x for 0x%.8x\n", |
| 451 | io->req.offset << context->block_size_shift, |
| 452 | io->req.size << context->block_size_shift); |
| 453 | |
| 454 | rc = window_set_bytemap(context, context->current, io->req.offset, |
| 455 | io->req.size, WINDOW_ERASED); |
| 456 | if (rc < 0) { |
| 457 | return rc; |
| 458 | } |
| 459 | |
| 460 | /* Write 0xFF to mem -> This ensures consistency between flash & ram */ |
| 461 | start = io->req.offset << context->block_size_shift; |
| 462 | len = io->req.size << context->block_size_shift; |
| 463 | memset(context->current->mem + start, 0xFF, len); |
| 464 | |
| 465 | return 0; |
| 466 | } |
| 467 | |
Andrew Jeffery | 9b920cf | 2018-08-07 22:49:19 +0930 | [diff] [blame] | 468 | int protocol_v2_flush(struct mbox_context *context, struct protocol_flush *io) |
| 469 | { |
| 470 | if (!(context->current && context->current_is_write)) { |
| 471 | MSG_ERR("Tried to call flush without open write window\n"); |
| 472 | return -EPERM; |
| 473 | } |
| 474 | |
| 475 | return generic_flush(context); |
| 476 | } |
| 477 | |
Andrew Jeffery | 093eda5 | 2018-08-07 23:10:43 +0930 | [diff] [blame] | 478 | int protocol_v2_close(struct mbox_context *context, struct protocol_close *io) |
| 479 | { |
| 480 | int rc; |
| 481 | |
| 482 | /* Close the current window if there is one */ |
| 483 | if (!context->current) { |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | /* There is an implicit flush if it was a write window */ |
| 488 | if (context->current_is_write) { |
| 489 | rc = protocol_v2_flush(context, NULL); |
| 490 | if (rc < 0) { |
| 491 | MSG_ERR("Couldn't Flush Write Window\n"); |
| 492 | return rc; |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | /* Host asked for it -> Don't set the BMC Event */ |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame^] | 497 | windows_close_current(context, EVENT_SUPPRESS, io->req.flags); |
Andrew Jeffery | 093eda5 | 2018-08-07 23:10:43 +0930 | [diff] [blame] | 498 | |
| 499 | return 0; |
| 500 | } |
| 501 | |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 502 | int protocol_init(struct mbox_context *context) |
| 503 | { |
Andrew Jeffery | c7d1947 | 2018-08-08 11:43:08 +0930 | [diff] [blame] | 504 | protocol_negotiate_version(context, API_MAX_VERSION); |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 505 | |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | void protocol_free(struct mbox_context *context) |
| 510 | { |
| 511 | return; |
| 512 | } |