Andrew Jeffery | 4fe996c | 2018-02-27 12:16:48 +1030 | [diff] [blame] | 1 | // SPDX-License-Identifier: Apache-2.0 |
| 2 | // Copyright (C) 2018 IBM Corp. |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 3 | |
| 4 | #define _GNU_SOURCE |
| 5 | #include <assert.h> |
| 6 | #include <errno.h> |
| 7 | #include <fcntl.h> |
| 8 | #include <getopt.h> |
| 9 | #include <limits.h> |
| 10 | #include <poll.h> |
| 11 | #include <stdbool.h> |
| 12 | #include <stdint.h> |
| 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <string.h> |
| 16 | #include <syslog.h> |
| 17 | #include <signal.h> |
| 18 | #include <sys/ioctl.h> |
| 19 | #include <sys/mman.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <sys/timerfd.h> |
| 22 | #include <sys/types.h> |
| 23 | #include <time.h> |
| 24 | #include <unistd.h> |
| 25 | #include <inttypes.h> |
| 26 | |
Andrew Jeffery | 26558db | 2018-08-10 00:22:38 +0930 | [diff] [blame] | 27 | #include "mboxd.h" |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 28 | #include "common.h" |
Andrew Jeffery | 457a6e5 | 2018-08-08 11:21:08 +0930 | [diff] [blame] | 29 | #include "transport_mbox.h" |
Andrew Jeffery | f593b1b | 2018-08-08 11:01:04 +0930 | [diff] [blame] | 30 | #include "windows.h" |
Andrew Jeffery | cd18611 | 2018-08-08 10:47:55 +0930 | [diff] [blame] | 31 | #include "lpc.h" |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 32 | |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 33 | struct errno_map { |
| 34 | int rc; |
| 35 | int mbox_errno; |
| 36 | }; |
| 37 | |
| 38 | static const struct errno_map errno_map_v1[] = { |
| 39 | { 0, MBOX_R_SUCCESS }, |
| 40 | { EACCES, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 41 | { EBADMSG, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 42 | { EBUSY, MBOX_R_SYSTEM_ERROR }, |
| 43 | { EINVAL, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 44 | { ENOTSUP, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 45 | { EPERM, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 46 | { EPROTO, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 47 | { ETIMEDOUT, MBOX_R_TIMEOUT }, |
| 48 | { -1, MBOX_R_SYSTEM_ERROR }, |
| 49 | }; |
| 50 | |
| 51 | static const struct errno_map errno_map_v2[] = { |
| 52 | { 0, MBOX_R_SUCCESS }, |
Andrew Jeffery | c7d1947 | 2018-08-08 11:43:08 +0930 | [diff] [blame] | 53 | { EACCES, MBOX_R_WINDOW_ERROR }, |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 54 | { EBADMSG, MBOX_R_SEQ_ERROR }, |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 55 | { EBUSY, MBOX_R_BUSY }, |
| 56 | { EINVAL, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 57 | { ENOTSUP, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 58 | { EPERM, MBOX_R_WINDOW_ERROR }, |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 59 | { EPROTO, MBOX_R_PARAM_ERROR }, |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 60 | { ETIMEDOUT, MBOX_R_TIMEOUT }, |
| 61 | { -1, MBOX_R_SYSTEM_ERROR }, |
| 62 | }; |
| 63 | |
| 64 | static const struct errno_map *errno_maps[] = { |
| 65 | [0] = NULL, |
| 66 | [1] = errno_map_v1, |
| 67 | [2] = errno_map_v2, |
| 68 | }; |
| 69 | |
| 70 | static inline int mbox_xlate_errno(struct mbox_context *context, |
| 71 | int rc) |
| 72 | { |
| 73 | const struct errno_map *entry; |
| 74 | |
| 75 | rc = -rc; |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 76 | MSG_DBG("Translating errno %d: %s\n", rc, strerror(rc)); |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 77 | for(entry = errno_maps[context->version]; entry->rc != -1; entry++) { |
| 78 | if (rc == entry->rc) { |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 79 | return entry->mbox_errno; |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 80 | } |
| 81 | } |
| 82 | |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 83 | return entry->mbox_errno; |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 84 | } |
| 85 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 86 | /* |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 87 | * transport_mbox_flush_events() - Write to the BMC controlled status register |
| 88 | * (reg 15) |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 89 | * @context: The mbox context pointer |
| 90 | * |
| 91 | * Return: 0 on success otherwise negative error code |
| 92 | */ |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 93 | static int transport_mbox_flush_events(struct mbox_context *context) |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 94 | { |
| 95 | int rc; |
| 96 | |
| 97 | /* Seek mbox registers */ |
| 98 | rc = lseek(context->fds[MBOX_FD].fd, MBOX_BMC_EVENT, SEEK_SET); |
| 99 | if (rc != MBOX_BMC_EVENT) { |
| 100 | MSG_ERR("Couldn't lseek mbox to byte %d: %s\n", MBOX_BMC_EVENT, |
| 101 | strerror(errno)); |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 102 | return -errno; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | /* Write to mbox status register */ |
| 106 | rc = write(context->fds[MBOX_FD].fd, &context->bmc_events, 1); |
| 107 | if (rc != 1) { |
| 108 | MSG_ERR("Couldn't write to BMC status reg: %s\n", |
| 109 | strerror(errno)); |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 110 | return -errno; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | /* Reset to start */ |
| 114 | rc = lseek(context->fds[MBOX_FD].fd, 0, SEEK_SET); |
| 115 | if (rc) { |
| 116 | MSG_ERR("Couldn't reset MBOX offset to zero: %s\n", |
| 117 | strerror(errno)); |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 118 | return -errno; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | |
Andrew Jeffery | 4414fb8 | 2018-08-20 12:13:09 +0930 | [diff] [blame] | 124 | static int transport_mbox_set_events(struct mbox_context *context, |
| 125 | uint8_t events) |
| 126 | { |
| 127 | context->bmc_events |= events; |
| 128 | |
| 129 | return transport_mbox_flush_events(context); |
| 130 | } |
| 131 | |
| 132 | static int transport_mbox_clear_events(struct mbox_context *context, |
| 133 | uint8_t events) |
| 134 | { |
| 135 | context->bmc_events &= ~events; |
| 136 | |
| 137 | return transport_mbox_flush_events(context); |
| 138 | } |
| 139 | |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 140 | static const struct transport_ops transport_mbox_ops = { |
Andrew Jeffery | 4414fb8 | 2018-08-20 12:13:09 +0930 | [diff] [blame] | 141 | .set_events = transport_mbox_set_events, |
| 142 | .clear_events = transport_mbox_clear_events, |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 143 | }; |
| 144 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 145 | /* Command Handlers */ |
| 146 | |
| 147 | /* |
| 148 | * Command: RESET_STATE |
Deepak Kodihalli | 017e45c | 2017-07-12 01:06:30 -0500 | [diff] [blame] | 149 | * Reset the LPC mapping to point back at the flash, or memory in case we're |
| 150 | * using a virtual pnor. |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 151 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 152 | static int mbox_handle_reset(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 153 | union mbox_regs *req, struct mbox_msg *resp) |
| 154 | { |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 155 | return context->protocol->reset(context); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | /* |
| 159 | * Command: GET_MBOX_INFO |
| 160 | * Get the API version, default window size and block size |
| 161 | * We also set the LPC mapping to point to the reserved memory region here so |
| 162 | * this command must be called before any window manipulation |
| 163 | * |
| 164 | * V1: |
| 165 | * ARGS[0]: API Version |
| 166 | * |
| 167 | * RESP[0]: API Version |
| 168 | * RESP[1:2]: Default read window size (number of blocks) |
| 169 | * RESP[3:4]: Default write window size (number of blocks) |
| 170 | * RESP[5]: Block size (as shift) |
| 171 | * |
| 172 | * V2: |
| 173 | * ARGS[0]: API Version |
| 174 | * |
| 175 | * RESP[0]: API Version |
| 176 | * RESP[1:2]: Default read window size (number of blocks) |
| 177 | * RESP[3:4]: Default write window size (number of blocks) |
| 178 | * RESP[5]: Block size (as shift) |
| 179 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 180 | static int mbox_handle_mbox_info(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 181 | union mbox_regs *req, struct mbox_msg *resp) |
| 182 | { |
| 183 | uint8_t mbox_api_version = req->msg.args[0]; |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 184 | struct protocol_get_info io = { |
| 185 | .req = { .api_version = mbox_api_version } |
| 186 | }; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 187 | int rc; |
| 188 | |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 189 | rc = context->protocol->get_info(context, &io); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 190 | if (rc < 0) { |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 191 | return rc; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 192 | } |
| 193 | |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 194 | /* |
| 195 | * Switch transport to mbox, however we need to delay flushing the |
| 196 | * event state until after the command is processed. |
| 197 | */ |
| 198 | context->transport = &transport_mbox_ops; |
| 199 | |
Andrew Jeffery | 1e531af | 2018-08-07 13:32:57 +0930 | [diff] [blame] | 200 | resp->args[0] = io.resp.api_version; |
| 201 | if (io.resp.api_version == API_VERSION_1) { |
| 202 | put_u16(&resp->args[1], io.resp.v1.read_window_size); |
| 203 | put_u16(&resp->args[3], io.resp.v1.write_window_size); |
| 204 | } else if (io.resp.api_version >= API_VERSION_2) { |
| 205 | resp->args[5] = io.resp.v2.block_size_shift; |
| 206 | put_u16(&resp->args[6], io.resp.v2.timeout); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * Command: GET_FLASH_INFO |
| 214 | * Get the flash size and erase granularity |
| 215 | * |
| 216 | * V1: |
| 217 | * RESP[0:3]: Flash Size (bytes) |
| 218 | * RESP[4:7]: Erase Size (bytes) |
| 219 | * V2: |
| 220 | * RESP[0:1]: Flash Size (number of blocks) |
| 221 | * RESP[2:3]: Erase Size (number of blocks) |
| 222 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 223 | static int mbox_handle_flash_info(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 224 | union mbox_regs *req, struct mbox_msg *resp) |
| 225 | { |
Andrew Jeffery | 91a8745 | 2018-08-07 14:54:14 +0930 | [diff] [blame] | 226 | struct protocol_get_flash_info io; |
| 227 | int rc; |
| 228 | |
| 229 | rc = context->protocol->get_flash_info(context, &io); |
| 230 | if (rc < 0) { |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 231 | return rc; |
Andrew Jeffery | 91a8745 | 2018-08-07 14:54:14 +0930 | [diff] [blame] | 232 | } |
| 233 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 234 | switch (context->version) { |
| 235 | case API_VERSION_1: |
| 236 | /* Both Sizes in Bytes */ |
Andrew Jeffery | 91a8745 | 2018-08-07 14:54:14 +0930 | [diff] [blame] | 237 | put_u32(&resp->args[0], io.resp.v1.flash_size); |
| 238 | put_u32(&resp->args[4], io.resp.v1.erase_size); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 239 | break; |
| 240 | case API_VERSION_2: |
| 241 | /* Both Sizes in Block Size */ |
Andrew Jeffery | 91a8745 | 2018-08-07 14:54:14 +0930 | [diff] [blame] | 242 | put_u16(&resp->args[0], io.resp.v2.flash_size); |
| 243 | put_u16(&resp->args[2], io.resp.v2.erase_size); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 244 | break; |
| 245 | default: |
| 246 | MSG_ERR("API Version Not Valid - Invalid System State\n"); |
| 247 | return -MBOX_R_SYSTEM_ERROR; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * get_lpc_addr_shifted() - Get lpc address of the current window |
| 255 | * @context: The mbox context pointer |
| 256 | * |
| 257 | * Return: The lpc address to access that offset shifted by block size |
| 258 | */ |
| 259 | static inline uint16_t get_lpc_addr_shifted(struct mbox_context *context) |
| 260 | { |
| 261 | uint32_t lpc_addr, mem_offset; |
| 262 | |
| 263 | /* Offset of the current window in the reserved memory region */ |
| 264 | mem_offset = context->current->mem - context->mem; |
| 265 | /* Total LPC Address */ |
| 266 | lpc_addr = context->lpc_base + mem_offset; |
| 267 | |
Suraj Jitindar Singh | 2851959 | 2017-04-27 14:48:58 +1000 | [diff] [blame] | 268 | MSG_DBG("LPC address of current window: 0x%.8x\n", lpc_addr); |
| 269 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 270 | return lpc_addr >> context->block_size_shift; |
| 271 | } |
| 272 | |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 273 | static int mbox_handle_create_window(struct mbox_context *context, bool ro, |
Andrew Jeffery | 4bcec8e | 2018-08-07 15:33:41 +0930 | [diff] [blame] | 274 | union mbox_regs *req, struct mbox_msg *resp) |
| 275 | { |
| 276 | struct protocol_create_window io; |
| 277 | int rc; |
| 278 | |
| 279 | io.req.offset = get_u16(&req->msg.args[0]); |
| 280 | io.req.ro = ro; |
| 281 | |
| 282 | rc = context->protocol->create_window(context, &io); |
| 283 | if (rc < 0) { |
| 284 | return rc; |
| 285 | } |
| 286 | |
| 287 | put_u16(&resp->args[0], io.resp.lpc_address); |
| 288 | if (context->version >= API_VERSION_2) { |
| 289 | put_u16(&resp->args[2], io.resp.size); |
| 290 | put_u16(&resp->args[4], io.resp.offset); |
| 291 | } |
| 292 | |
| 293 | return 0; |
| 294 | } |
| 295 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 296 | /* |
| 297 | * Command: CREATE_READ_WINDOW |
| 298 | * Opens a read window |
| 299 | * First checks if any current window with the requested data, if so we just |
| 300 | * point the host to that. Otherwise we read the request data in from flash and |
| 301 | * point the host there. |
| 302 | * |
| 303 | * V1: |
| 304 | * ARGS[0:1]: Window Location as Offset into Flash (number of blocks) |
| 305 | * |
| 306 | * RESP[0:1]: LPC bus address for host to access this window (number of blocks) |
| 307 | * |
| 308 | * V2: |
| 309 | * ARGS[0:1]: Window Location as Offset into Flash (number of blocks) |
| 310 | * ARGS[2:3]: Requested window size (number of blocks) |
| 311 | * |
| 312 | * RESP[0:1]: LPC bus address for host to access this window (number of blocks) |
| 313 | * RESP[2:3]: Actual window size that the host can access (number of blocks) |
| 314 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 315 | static int mbox_handle_read_window(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 316 | union mbox_regs *req, struct mbox_msg *resp) |
| 317 | { |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 318 | return mbox_handle_create_window(context, true, req, resp); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | /* |
| 322 | * Command: CREATE_WRITE_WINDOW |
| 323 | * Opens a write window |
| 324 | * First checks if any current window with the requested data, if so we just |
| 325 | * point the host to that. Otherwise we read the request data in from flash and |
| 326 | * point the host there. |
| 327 | * |
| 328 | * V1: |
| 329 | * ARGS[0:1]: Window Location as Offset into Flash (number of blocks) |
| 330 | * |
| 331 | * RESP[0:1]: LPC bus address for host to access this window (number of blocks) |
| 332 | * |
| 333 | * V2: |
| 334 | * ARGS[0:1]: Window Location as Offset into Flash (number of blocks) |
| 335 | * ARGS[2:3]: Requested window size (number of blocks) |
| 336 | * |
| 337 | * RESP[0:1]: LPC bus address for host to access this window (number of blocks) |
| 338 | * RESP[2:3]: Actual window size that was mapped/host can access (n.o. blocks) |
| 339 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 340 | static int mbox_handle_write_window(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 341 | union mbox_regs *req, struct mbox_msg *resp) |
| 342 | { |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 343 | return mbox_handle_create_window(context, false, req, resp); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | /* |
| 347 | * Commands: MARK_WRITE_DIRTY |
| 348 | * Marks a portion of the current (write) window dirty, informing the daemon |
| 349 | * that is has been written to and thus must be at some point written to the |
| 350 | * backing store |
| 351 | * These changes aren't written back to the backing store unless flush is then |
| 352 | * called or the window closed |
| 353 | * |
| 354 | * V1: |
| 355 | * ARGS[0:1]: Where within flash to start (number of blocks) |
| 356 | * ARGS[2:5]: Number to mark dirty (number of bytes) |
| 357 | * |
| 358 | * V2: |
| 359 | * ARGS[0:1]: Where within window to start (number of blocks) |
| 360 | * ARGS[2:3]: Number to mark dirty (number of blocks) |
| 361 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 362 | static int mbox_handle_dirty_window(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 363 | union mbox_regs *req, struct mbox_msg *resp) |
| 364 | { |
Andrew Jeffery | a336e43 | 2018-08-07 16:00:40 +0930 | [diff] [blame] | 365 | struct protocol_mark_dirty io; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 366 | |
Andrew Jeffery | a336e43 | 2018-08-07 16:00:40 +0930 | [diff] [blame] | 367 | if (context->version == API_VERSION_1) { |
| 368 | io.req.v1.offset = get_u16(&req->msg.args[0]); |
| 369 | io.req.v1.size = get_u32(&req->msg.args[2]); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 370 | } else { |
Andrew Jeffery | a336e43 | 2018-08-07 16:00:40 +0930 | [diff] [blame] | 371 | io.req.v2.offset = get_u16(&req->msg.args[0]); |
| 372 | io.req.v2.size = get_u16(&req->msg.args[2]); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 373 | } |
| 374 | |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 375 | return context->protocol->mark_dirty(context, &io); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Commands: MARK_WRITE_ERASE |
| 380 | * Erases a portion of the current window |
| 381 | * These changes aren't written back to the backing store unless flush is then |
| 382 | * called or the window closed |
| 383 | * |
| 384 | * V1: |
| 385 | * Unimplemented |
| 386 | * |
| 387 | * V2: |
| 388 | * ARGS[0:1]: Where within window to start (number of blocks) |
| 389 | * ARGS[2:3]: Number to erase (number of blocks) |
| 390 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 391 | static int mbox_handle_erase_window(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 392 | union mbox_regs *req, struct mbox_msg *resp) |
| 393 | { |
Andrew Jeffery | 62a3daa | 2018-08-07 22:30:32 +0930 | [diff] [blame] | 394 | struct protocol_erase io; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 395 | |
Andrew Jeffery | 62a3daa | 2018-08-07 22:30:32 +0930 | [diff] [blame] | 396 | io.req.offset = get_u16(&req->msg.args[0]); |
| 397 | io.req.size = get_u16(&req->msg.args[2]); |
| 398 | |
| 399 | if (!context->protocol->erase) { |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 400 | MSG_ERR("Protocol Version invalid for Erase Command\n"); |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 401 | return -ENOTSUP; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 402 | } |
| 403 | |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 404 | return context->protocol->erase(context, &io); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /* |
| 408 | * Command: WRITE_FLUSH |
| 409 | * Flushes any dirty or erased blocks in the current window back to the backing |
| 410 | * store |
| 411 | * NOTE: For V1 this behaves much the same as the dirty command in that it |
| 412 | * takes an offset and number of blocks to dirty, then also performs a flush as |
| 413 | * part of the same command. For V2 this will only flush blocks already marked |
| 414 | * dirty/erased with the appropriate commands and doesn't take any arguments |
| 415 | * directly. |
| 416 | * |
| 417 | * V1: |
| 418 | * ARGS[0:1]: Where within window to start (number of blocks) |
| 419 | * ARGS[2:5]: Number to mark dirty (number of bytes) |
| 420 | * |
| 421 | * V2: |
| 422 | * NONE |
| 423 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 424 | static int mbox_handle_flush_window(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 425 | union mbox_regs *req, struct mbox_msg *resp) |
| 426 | { |
Andrew Jeffery | 9b920cf | 2018-08-07 22:49:19 +0930 | [diff] [blame] | 427 | struct protocol_flush io = { 0 }; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 428 | |
Andrew Jeffery | 9b920cf | 2018-08-07 22:49:19 +0930 | [diff] [blame] | 429 | if (context->version == API_VERSION_1) { |
| 430 | io.req.offset = get_u16(&req->msg.args[0]); |
| 431 | io.req.size = get_u32(&req->msg.args[2]); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 432 | } |
| 433 | |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 434 | return context->protocol->flush(context, &io); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Command: CLOSE_WINDOW |
| 439 | * Close the current window |
| 440 | * NOTE: There is an implicit flush |
| 441 | * |
| 442 | * V1: |
| 443 | * NONE |
| 444 | * |
| 445 | * V2: |
| 446 | * ARGS[0]: FLAGS |
| 447 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 448 | static int mbox_handle_close_window(struct mbox_context *context, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 449 | union mbox_regs *req, struct mbox_msg *resp) |
| 450 | { |
Andrew Jeffery | 093eda5 | 2018-08-07 23:10:43 +0930 | [diff] [blame] | 451 | struct protocol_close io = { 0 }; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 452 | |
Andrew Jeffery | 093eda5 | 2018-08-07 23:10:43 +0930 | [diff] [blame] | 453 | if (context->version >= API_VERSION_2) { |
| 454 | io.req.flags = req->msg.args[0]; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 455 | } |
| 456 | |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 457 | return context->protocol->close(context, &io); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | /* |
| 461 | * Command: BMC_EVENT_ACK |
| 462 | * Sent by the host to acknowledge BMC events supplied in mailbox register 15 |
| 463 | * |
| 464 | * ARGS[0]: Bitmap of bits to ack (by clearing) |
| 465 | */ |
Andrew Jeffery | f21c81c | 2018-08-09 13:57:46 +0930 | [diff] [blame] | 466 | static int mbox_handle_ack(struct mbox_context *context, union mbox_regs *req, |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 467 | struct mbox_msg *resp) |
| 468 | { |
Andrew Jeffery | c5c8304 | 2018-08-07 23:22:05 +0930 | [diff] [blame] | 469 | struct protocol_ack io; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 470 | |
Andrew Jeffery | c5c8304 | 2018-08-07 23:22:05 +0930 | [diff] [blame] | 471 | io.req.flags = req->msg.args[0]; |
| 472 | |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 473 | return context->protocol->ack(context, &io); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | /* |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 477 | * check_req_valid() - Check if the given request is a valid mbox request |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 478 | * @context: The mbox context pointer |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 479 | * @cmd: The request registers |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 480 | * |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 481 | * Return: 0 if request is valid otherwise negative error code |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 482 | */ |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 483 | static int check_req_valid(struct mbox_context *context, union mbox_regs *req) |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 484 | { |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 485 | uint8_t cmd = req->msg.command; |
| 486 | uint8_t seq = req->msg.seq; |
| 487 | |
| 488 | if (cmd > NUM_MBOX_CMDS) { |
Andrew Jeffery | 121dc0d | 2017-04-24 16:15:06 +0930 | [diff] [blame] | 489 | MSG_ERR("Unknown mbox command: %d\n", cmd); |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 490 | return -ENOTSUP; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 491 | } |
Andrew Jeffery | 121dc0d | 2017-04-24 16:15:06 +0930 | [diff] [blame] | 492 | |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 493 | if (seq == context->prev_seq && cmd != MBOX_C_GET_MBOX_INFO) { |
Suraj Jitindar Singh | 2851959 | 2017-04-27 14:48:58 +1000 | [diff] [blame] | 494 | MSG_ERR("Invalid sequence number: %d, previous: %d\n", seq, |
| 495 | context->prev_seq); |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 496 | return -EBADMSG; |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 497 | } |
| 498 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 499 | if (context->state & STATE_SUSPENDED) { |
| 500 | if (cmd != MBOX_C_GET_MBOX_INFO && cmd != MBOX_C_ACK) { |
| 501 | MSG_ERR("Cannot use that cmd while suspended: %d\n", |
| 502 | cmd); |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 503 | return -EBUSY; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 504 | } |
| 505 | } |
Andrew Jeffery | 121dc0d | 2017-04-24 16:15:06 +0930 | [diff] [blame] | 506 | |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 507 | if (context->transport != &transport_mbox_ops) { |
| 508 | if (cmd != MBOX_C_RESET_STATE && cmd != MBOX_C_GET_MBOX_INFO) { |
| 509 | MSG_ERR("Cannot switch transport with command %d\n", |
| 510 | cmd); |
| 511 | return -EPROTO; |
| 512 | } |
| 513 | } |
| 514 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 515 | if (!(context->state & MAPS_MEM)) { |
| 516 | if (cmd != MBOX_C_RESET_STATE && cmd != MBOX_C_GET_MBOX_INFO |
| 517 | && cmd != MBOX_C_ACK) { |
Andrew Jeffery | 121dc0d | 2017-04-24 16:15:06 +0930 | [diff] [blame] | 518 | MSG_ERR("Must call GET_MBOX_INFO before %d\n", cmd); |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 519 | return -EPROTO; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 520 | } |
| 521 | } |
| 522 | |
| 523 | return 0; |
| 524 | } |
| 525 | |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 526 | typedef int (*mboxd_mbox_handler)(struct mbox_context *, union mbox_regs *, |
| 527 | struct mbox_msg *); |
| 528 | |
| 529 | static const mboxd_mbox_handler transport_mbox_handlers[] = { |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 530 | mbox_handle_reset, |
| 531 | mbox_handle_mbox_info, |
| 532 | mbox_handle_flash_info, |
| 533 | mbox_handle_read_window, |
| 534 | mbox_handle_close_window, |
| 535 | mbox_handle_write_window, |
| 536 | mbox_handle_dirty_window, |
| 537 | mbox_handle_flush_window, |
| 538 | mbox_handle_ack, |
| 539 | mbox_handle_erase_window |
| 540 | }; |
| 541 | |
| 542 | /* |
| 543 | * handle_mbox_req() - Handle an incoming mbox command request |
| 544 | * @context: The mbox context pointer |
| 545 | * @req: The mbox request message |
| 546 | * |
| 547 | * Return: 0 if handled successfully otherwise negative error code |
| 548 | */ |
| 549 | static int handle_mbox_req(struct mbox_context *context, union mbox_regs *req) |
| 550 | { |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 551 | const struct transport_ops *old_transport = context->transport; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 552 | struct mbox_msg resp = { |
| 553 | .command = req->msg.command, |
| 554 | .seq = req->msg.seq, |
| 555 | .args = { 0 }, |
| 556 | .response = MBOX_R_SUCCESS |
| 557 | }; |
Suraj Jitindar Singh | 2851959 | 2017-04-27 14:48:58 +1000 | [diff] [blame] | 558 | int rc = 0, len, i; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 559 | |
Suraj Jitindar Singh | 2851959 | 2017-04-27 14:48:58 +1000 | [diff] [blame] | 560 | MSG_INFO("Received MBOX command: %u\n", req->msg.command); |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 561 | |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 562 | rc = check_req_valid(context, req); |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 563 | if (!rc) { |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 564 | mboxd_mbox_handler handler; |
| 565 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 566 | /* Commands start at 1 so we have to subtract 1 from the cmd */ |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 567 | handler = transport_mbox_handlers[req->msg.command - 1]; |
| 568 | rc = handler(context, req, &resp); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 569 | if (rc < 0) { |
| 570 | MSG_ERR("Error handling mbox cmd: %d\n", |
| 571 | req->msg.command); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 572 | } |
| 573 | } |
| 574 | |
Andrew Jeffery | 2f1477c | 2018-08-09 23:24:38 +0930 | [diff] [blame] | 575 | rc = mbox_xlate_errno(context, rc); |
| 576 | resp.response = rc; |
Andrew Jeffery | 55dede6 | 2017-04-24 16:13:06 +0930 | [diff] [blame] | 577 | context->prev_seq = req->msg.seq; |
| 578 | |
Suraj Jitindar Singh | 2851959 | 2017-04-27 14:48:58 +1000 | [diff] [blame] | 579 | MSG_DBG("Writing MBOX response:\n"); |
| 580 | MSG_DBG("MBOX cmd: %u\n", resp.command); |
| 581 | MSG_DBG("MBOX seq: %u\n", resp.seq); |
| 582 | for (i = 0; i < MBOX_ARGS_BYTES; i++) { |
| 583 | MSG_DBG("MBOX arg[%d]: 0x%.2x\n", i, resp.args[i]); |
| 584 | } |
| 585 | MSG_INFO("Writing MBOX response: %u\n", resp.response); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 586 | len = write(context->fds[MBOX_FD].fd, &resp, sizeof(resp)); |
| 587 | if (len < sizeof(resp)) { |
| 588 | MSG_ERR("Didn't write the full response\n"); |
| 589 | rc = -errno; |
| 590 | } |
| 591 | |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 592 | if (context->transport != old_transport && |
| 593 | context->transport == &transport_mbox_ops) { |
Andrew Jeffery | 0453aa4 | 2018-08-21 08:25:46 +0930 | [diff] [blame] | 594 | /* A bit messy, but we need the correct event mask */ |
| 595 | protocol_events_set(context, context->bmc_events); |
Andrew Jeffery | 23a4821 | 2018-08-10 14:41:48 +0930 | [diff] [blame] | 596 | } |
| 597 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 598 | return rc; |
| 599 | } |
| 600 | |
| 601 | /* |
| 602 | * get_message() - Read an mbox request message from the mbox registers |
| 603 | * @context: The mbox context pointer |
| 604 | * @msg: Where to put the received message |
| 605 | * |
| 606 | * Return: 0 if read successfully otherwise negative error code |
| 607 | */ |
| 608 | static int get_message(struct mbox_context *context, union mbox_regs *msg) |
| 609 | { |
Suraj Jitindar Singh | 2851959 | 2017-04-27 14:48:58 +1000 | [diff] [blame] | 610 | int rc, i; |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 611 | |
| 612 | rc = read(context->fds[MBOX_FD].fd, msg, sizeof(msg->raw)); |
| 613 | if (rc < 0) { |
| 614 | MSG_ERR("Couldn't read: %s\n", strerror(errno)); |
| 615 | return -errno; |
| 616 | } else if (rc < sizeof(msg->raw)) { |
| 617 | MSG_ERR("Short read: %d expecting %zu\n", rc, sizeof(msg->raw)); |
| 618 | return -1; |
| 619 | } |
| 620 | |
Suraj Jitindar Singh | 2851959 | 2017-04-27 14:48:58 +1000 | [diff] [blame] | 621 | MSG_DBG("Received MBOX request:\n"); |
| 622 | MSG_DBG("MBOX cmd: %u\n", msg->msg.command); |
| 623 | MSG_DBG("MBOX seq: %u\n", msg->msg.seq); |
| 624 | for (i = 0; i < MBOX_ARGS_BYTES; i++) { |
| 625 | MSG_DBG("MBOX arg[%d]: 0x%.2x\n", i, msg->msg.args[i]); |
| 626 | } |
| 627 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 628 | return 0; |
| 629 | } |
| 630 | |
| 631 | /* |
Andrew Jeffery | d86141b | 2018-08-09 14:58:53 +0930 | [diff] [blame] | 632 | * transport_mbox_dispatch() - handle an mbox interrupt |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 633 | * @context: The mbox context pointer |
| 634 | * |
| 635 | * Return: 0 if handled successfully otherwise negative error code |
| 636 | */ |
Andrew Jeffery | d86141b | 2018-08-09 14:58:53 +0930 | [diff] [blame] | 637 | int transport_mbox_dispatch(struct mbox_context *context) |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 638 | { |
| 639 | int rc = 0; |
| 640 | union mbox_regs req = { 0 }; |
| 641 | |
| 642 | assert(context); |
| 643 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 644 | rc = get_message(context, &req); |
| 645 | if (rc) { |
| 646 | return rc; |
| 647 | } |
| 648 | |
| 649 | return handle_mbox_req(context, &req); |
| 650 | } |
| 651 | |
Andrew Jeffery | b2466ee | 2018-08-09 15:03:27 +0930 | [diff] [blame] | 652 | int __transport_mbox_init(struct mbox_context *context, const char *path) |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 653 | { |
| 654 | int fd; |
| 655 | |
Andrew Jeffery | 5335f09 | 2018-08-09 14:56:08 +0930 | [diff] [blame] | 656 | context->transport = &transport_mbox_ops; |
Andrew Jeffery | efb09de | 2018-03-26 14:36:43 +1030 | [diff] [blame] | 657 | |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 658 | /* Open MBOX Device */ |
Andrew Jeffery | 913740f | 2017-04-10 23:51:07 +0930 | [diff] [blame] | 659 | fd = open(path, O_RDWR | O_NONBLOCK); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 660 | if (fd < 0) { |
| 661 | MSG_ERR("Couldn't open %s with flags O_RDWR: %s\n", |
Andrew Jeffery | 913740f | 2017-04-10 23:51:07 +0930 | [diff] [blame] | 662 | path, strerror(errno)); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 663 | return -errno; |
| 664 | } |
Suraj Jitindar Singh | 2851959 | 2017-04-27 14:48:58 +1000 | [diff] [blame] | 665 | MSG_DBG("Opened mbox dev: %s\n", path); |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 666 | |
| 667 | context->fds[MBOX_FD].fd = fd; |
| 668 | |
| 669 | return 0; |
| 670 | } |
| 671 | |
Andrew Jeffery | b2466ee | 2018-08-09 15:03:27 +0930 | [diff] [blame] | 672 | int transport_mbox_init(struct mbox_context *context) |
Andrew Jeffery | 913740f | 2017-04-10 23:51:07 +0930 | [diff] [blame] | 673 | { |
Andrew Jeffery | b2466ee | 2018-08-09 15:03:27 +0930 | [diff] [blame] | 674 | return __transport_mbox_init(context, MBOX_HOST_PATH); |
Andrew Jeffery | 913740f | 2017-04-10 23:51:07 +0930 | [diff] [blame] | 675 | } |
| 676 | |
Andrew Jeffery | 55260ce | 2018-08-09 15:05:59 +0930 | [diff] [blame] | 677 | void transport_mbox_free(struct mbox_context *context) |
Suraj Jitindar Singh | e39c916 | 2017-03-28 10:47:43 +1100 | [diff] [blame] | 678 | { |
| 679 | close(context->fds[MBOX_FD].fd); |
| 680 | } |