Sreelakshmi Gownipalli | 8d477d3 | 2017-02-08 19:49:06 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2008-2017, The Linux Foundation. All rights reserved. |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/cdev.h> |
| 17 | #include <linux/fs.h> |
| 18 | #include <linux/device.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/uaccess.h> |
| 21 | #include <linux/diagchar.h> |
| 22 | #include <linux/sched.h> |
| 23 | #include <linux/ratelimit.h> |
| 24 | #include <linux/timer.h> |
| 25 | #ifdef CONFIG_DIAG_OVER_USB |
| 26 | #include <linux/usb/usbdiag.h> |
| 27 | #endif |
| 28 | #include <asm/current.h> |
| 29 | #include "diagchar_hdlc.h" |
| 30 | #include "diagmem.h" |
| 31 | #include "diagchar.h" |
| 32 | #include "diagfwd.h" |
| 33 | #include "diagfwd_cntl.h" |
| 34 | #include "diag_dci.h" |
| 35 | #include "diag_debugfs.h" |
| 36 | #include "diag_masks.h" |
| 37 | #include "diagfwd_bridge.h" |
| 38 | #include "diag_usb.h" |
| 39 | #include "diag_memorydevice.h" |
| 40 | #include "diag_mux.h" |
| 41 | #include "diag_ipc_logging.h" |
| 42 | #include "diagfwd_peripheral.h" |
| 43 | |
| 44 | #include <linux/coresight-stm.h> |
| 45 | #include <linux/kernel.h> |
| 46 | #ifdef CONFIG_COMPAT |
| 47 | #include <linux/compat.h> |
| 48 | #endif |
| 49 | |
| 50 | MODULE_DESCRIPTION("Diag Char Driver"); |
| 51 | MODULE_LICENSE("GPL v2"); |
| 52 | |
| 53 | #define MIN_SIZ_ALLOW 4 |
| 54 | #define INIT 1 |
| 55 | #define EXIT -1 |
| 56 | struct diagchar_dev *driver; |
| 57 | struct diagchar_priv { |
| 58 | int pid; |
| 59 | }; |
| 60 | |
| 61 | #define USER_SPACE_RAW_DATA 0 |
| 62 | #define USER_SPACE_HDLC_DATA 1 |
| 63 | |
| 64 | /* Memory pool variables */ |
| 65 | /* Used for copying any incoming packet from user space clients. */ |
| 66 | static unsigned int poolsize = 12; |
| 67 | module_param(poolsize, uint, 0000); |
| 68 | |
| 69 | /* |
| 70 | * Used for HDLC encoding packets coming from the user |
| 71 | * space. |
| 72 | */ |
| 73 | static unsigned int poolsize_hdlc = 10; |
| 74 | module_param(poolsize_hdlc, uint, 0000); |
| 75 | |
| 76 | /* |
| 77 | * This is used for incoming DCI requests from the user space clients. |
| 78 | * Don't expose itemsize as it is internal. |
| 79 | */ |
| 80 | static unsigned int poolsize_user = 8; |
| 81 | module_param(poolsize_user, uint, 0000); |
| 82 | |
| 83 | /* |
| 84 | * USB structures allocated for writing Diag data generated on the Apps to USB. |
| 85 | * Don't expose itemsize as it is constant. |
| 86 | */ |
| 87 | static unsigned int itemsize_usb_apps = sizeof(struct diag_request); |
| 88 | static unsigned int poolsize_usb_apps = 10; |
| 89 | module_param(poolsize_usb_apps, uint, 0000); |
| 90 | |
| 91 | /* Used for DCI client buffers. Don't expose itemsize as it is constant. */ |
| 92 | static unsigned int poolsize_dci = 10; |
| 93 | module_param(poolsize_dci, uint, 0000); |
| 94 | |
| 95 | #ifdef CONFIG_DIAGFWD_BRIDGE_CODE |
| 96 | /* Used for reading data from the remote device. */ |
| 97 | static unsigned int itemsize_mdm = DIAG_MDM_BUF_SIZE; |
| 98 | static unsigned int poolsize_mdm = 18; |
| 99 | module_param(itemsize_mdm, uint, 0000); |
| 100 | module_param(poolsize_mdm, uint, 0000); |
| 101 | |
| 102 | /* |
| 103 | * Used for reading DCI data from the remote device. |
| 104 | * Don't expose poolsize for DCI data. There is only one read buffer |
| 105 | */ |
| 106 | static unsigned int itemsize_mdm_dci = DIAG_MDM_BUF_SIZE; |
| 107 | static unsigned int poolsize_mdm_dci = 1; |
| 108 | module_param(itemsize_mdm_dci, uint, 0000); |
| 109 | |
| 110 | /* |
| 111 | * Used for USB structues associated with a remote device. |
| 112 | * Don't expose the itemsize since it is constant. |
| 113 | */ |
| 114 | static unsigned int itemsize_mdm_usb = sizeof(struct diag_request); |
| 115 | static unsigned int poolsize_mdm_usb = 18; |
| 116 | module_param(poolsize_mdm_usb, uint, 0000); |
| 117 | |
| 118 | /* |
| 119 | * Used for writing read DCI data to remote peripherals. Don't |
| 120 | * expose poolsize for DCI data. There is only one read |
| 121 | * buffer. Add 6 bytes for DCI header information: Start (1), |
| 122 | * Version (1), Length (2), Tag (2) |
| 123 | */ |
| 124 | static unsigned int itemsize_mdm_dci_write = DIAG_MDM_DCI_BUF_SIZE; |
| 125 | static unsigned int poolsize_mdm_dci_write = 1; |
| 126 | module_param(itemsize_mdm_dci_write, uint, 0000); |
| 127 | |
| 128 | /* |
| 129 | * Used for USB structures associated with a remote SMUX |
| 130 | * device Don't expose the itemsize since it is constant |
| 131 | */ |
| 132 | static unsigned int itemsize_qsc_usb = sizeof(struct diag_request); |
| 133 | static unsigned int poolsize_qsc_usb = 8; |
| 134 | module_param(poolsize_qsc_usb, uint, 0000); |
| 135 | #endif |
| 136 | |
| 137 | /* This is the max number of user-space clients supported at initialization*/ |
| 138 | static unsigned int max_clients = 15; |
| 139 | static unsigned int threshold_client_limit = 50; |
| 140 | module_param(max_clients, uint, 0000); |
| 141 | |
| 142 | /* Timer variables */ |
| 143 | static struct timer_list drain_timer; |
| 144 | static int timer_in_progress; |
| 145 | |
Manoj Prabhu B | 95427a2 | 2016-11-04 11:58:11 +0530 | [diff] [blame] | 146 | /* |
| 147 | * Diag Mask clear variable |
| 148 | * Used for clearing masks upon |
| 149 | * USB disconnection and stopping ODL |
| 150 | */ |
| 151 | static int diag_mask_clear_param = 1; |
| 152 | module_param(diag_mask_clear_param, int, 0644); |
| 153 | |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 154 | struct diag_apps_data_t { |
| 155 | void *buf; |
| 156 | uint32_t len; |
| 157 | int ctxt; |
| 158 | }; |
| 159 | |
| 160 | static struct diag_apps_data_t hdlc_data; |
| 161 | static struct diag_apps_data_t non_hdlc_data; |
| 162 | static struct mutex apps_data_mutex; |
| 163 | |
| 164 | #define DIAGPKT_MAX_DELAYED_RSP 0xFFFF |
| 165 | |
| 166 | #ifdef DIAG_DEBUG |
| 167 | uint16_t diag_debug_mask; |
| 168 | void *diag_ipc_log; |
| 169 | #endif |
| 170 | |
| 171 | static void diag_md_session_close(struct diag_md_session_t *session_info); |
| 172 | |
| 173 | /* |
| 174 | * Returns the next delayed rsp id. If wrapping is enabled, |
| 175 | * wraps the delayed rsp id to DIAGPKT_MAX_DELAYED_RSP. |
| 176 | */ |
| 177 | static uint16_t diag_get_next_delayed_rsp_id(void) |
| 178 | { |
| 179 | uint16_t rsp_id = 0; |
| 180 | |
| 181 | mutex_lock(&driver->delayed_rsp_mutex); |
| 182 | rsp_id = driver->delayed_rsp_id; |
| 183 | if (rsp_id < DIAGPKT_MAX_DELAYED_RSP) |
| 184 | rsp_id++; |
| 185 | else { |
| 186 | if (wrap_enabled) { |
| 187 | rsp_id = 1; |
| 188 | wrap_count++; |
| 189 | } else |
| 190 | rsp_id = DIAGPKT_MAX_DELAYED_RSP; |
| 191 | } |
| 192 | driver->delayed_rsp_id = rsp_id; |
| 193 | mutex_unlock(&driver->delayed_rsp_mutex); |
| 194 | |
| 195 | return rsp_id; |
| 196 | } |
| 197 | |
| 198 | static int diag_switch_logging(struct diag_logging_mode_param_t *param); |
| 199 | |
| 200 | #define COPY_USER_SPACE_OR_ERR(buf, data, length) \ |
| 201 | do { \ |
| 202 | if ((count < ret+length) || (copy_to_user(buf, \ |
| 203 | (void *)&data, length))) { \ |
| 204 | ret = -EFAULT; \ |
| 205 | } \ |
| 206 | ret += length; \ |
| 207 | } while (0) |
| 208 | |
| 209 | static void drain_timer_func(unsigned long data) |
| 210 | { |
| 211 | queue_work(driver->diag_wq, &(driver->diag_drain_work)); |
| 212 | } |
| 213 | |
| 214 | static void diag_drain_apps_data(struct diag_apps_data_t *data) |
| 215 | { |
| 216 | int err = 0; |
| 217 | |
| 218 | if (!data || !data->buf) |
| 219 | return; |
| 220 | |
| 221 | err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, |
| 222 | data->ctxt); |
| 223 | if (err) |
| 224 | diagmem_free(driver, data->buf, POOL_TYPE_HDLC); |
| 225 | |
| 226 | data->buf = NULL; |
| 227 | data->len = 0; |
| 228 | } |
| 229 | |
| 230 | void diag_update_user_client_work_fn(struct work_struct *work) |
| 231 | { |
| 232 | diag_update_userspace_clients(HDLC_SUPPORT_TYPE); |
| 233 | } |
| 234 | |
| 235 | static void diag_update_md_client_work_fn(struct work_struct *work) |
| 236 | { |
| 237 | diag_update_md_clients(HDLC_SUPPORT_TYPE); |
| 238 | } |
| 239 | |
| 240 | void diag_drain_work_fn(struct work_struct *work) |
| 241 | { |
| 242 | struct diag_md_session_t *session_info = NULL; |
| 243 | uint8_t hdlc_disabled = 0; |
| 244 | |
| 245 | timer_in_progress = 0; |
| 246 | mutex_lock(&apps_data_mutex); |
| 247 | session_info = diag_md_session_get_peripheral(APPS_DATA); |
| 248 | if (session_info) |
| 249 | hdlc_disabled = session_info->hdlc_disabled; |
| 250 | else |
| 251 | hdlc_disabled = driver->hdlc_disabled; |
| 252 | |
| 253 | if (!hdlc_disabled) |
| 254 | diag_drain_apps_data(&hdlc_data); |
| 255 | else |
| 256 | diag_drain_apps_data(&non_hdlc_data); |
| 257 | mutex_unlock(&apps_data_mutex); |
| 258 | } |
| 259 | |
| 260 | void check_drain_timer(void) |
| 261 | { |
| 262 | int ret = 0; |
| 263 | |
| 264 | if (!timer_in_progress) { |
| 265 | timer_in_progress = 1; |
| 266 | ret = mod_timer(&drain_timer, jiffies + msecs_to_jiffies(200)); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | void diag_add_client(int i, struct file *file) |
| 271 | { |
| 272 | struct diagchar_priv *diagpriv_data; |
| 273 | |
| 274 | driver->client_map[i].pid = current->tgid; |
| 275 | diagpriv_data = kmalloc(sizeof(struct diagchar_priv), |
| 276 | GFP_KERNEL); |
| 277 | if (diagpriv_data) |
| 278 | diagpriv_data->pid = current->tgid; |
| 279 | file->private_data = diagpriv_data; |
| 280 | strlcpy(driver->client_map[i].name, current->comm, 20); |
| 281 | driver->client_map[i].name[19] = '\0'; |
| 282 | } |
| 283 | |
| 284 | static void diag_mempool_init(void) |
| 285 | { |
| 286 | uint32_t itemsize = DIAG_MAX_REQ_SIZE; |
| 287 | uint32_t itemsize_hdlc = DIAG_MAX_HDLC_BUF_SIZE + APF_DIAG_PADDING; |
| 288 | uint32_t itemsize_dci = IN_BUF_SIZE; |
| 289 | uint32_t itemsize_user = DCI_REQ_BUF_SIZE; |
| 290 | |
| 291 | itemsize += ((DCI_HDR_SIZE > CALLBACK_HDR_SIZE) ? DCI_HDR_SIZE : |
| 292 | CALLBACK_HDR_SIZE); |
| 293 | diagmem_setsize(POOL_TYPE_COPY, itemsize, poolsize); |
| 294 | diagmem_setsize(POOL_TYPE_HDLC, itemsize_hdlc, poolsize_hdlc); |
| 295 | diagmem_setsize(POOL_TYPE_DCI, itemsize_dci, poolsize_dci); |
| 296 | diagmem_setsize(POOL_TYPE_USER, itemsize_user, poolsize_user); |
| 297 | |
| 298 | diagmem_init(driver, POOL_TYPE_COPY); |
| 299 | diagmem_init(driver, POOL_TYPE_HDLC); |
| 300 | diagmem_init(driver, POOL_TYPE_USER); |
| 301 | diagmem_init(driver, POOL_TYPE_DCI); |
| 302 | } |
| 303 | |
| 304 | static void diag_mempool_exit(void) |
| 305 | { |
| 306 | diagmem_exit(driver, POOL_TYPE_COPY); |
| 307 | diagmem_exit(driver, POOL_TYPE_HDLC); |
| 308 | diagmem_exit(driver, POOL_TYPE_USER); |
| 309 | diagmem_exit(driver, POOL_TYPE_DCI); |
| 310 | } |
| 311 | |
| 312 | static int diagchar_open(struct inode *inode, struct file *file) |
| 313 | { |
| 314 | int i = 0; |
| 315 | void *temp; |
| 316 | |
| 317 | if (driver) { |
| 318 | mutex_lock(&driver->diagchar_mutex); |
| 319 | |
| 320 | for (i = 0; i < driver->num_clients; i++) |
| 321 | if (driver->client_map[i].pid == 0) |
| 322 | break; |
| 323 | |
| 324 | if (i < driver->num_clients) { |
| 325 | diag_add_client(i, file); |
| 326 | } else { |
| 327 | if (i < threshold_client_limit) { |
| 328 | driver->num_clients++; |
| 329 | temp = krealloc(driver->client_map |
| 330 | , (driver->num_clients) * sizeof(struct |
| 331 | diag_client_map), GFP_KERNEL); |
| 332 | if (!temp) |
| 333 | goto fail; |
| 334 | else |
| 335 | driver->client_map = temp; |
| 336 | temp = krealloc(driver->data_ready |
| 337 | , (driver->num_clients) * sizeof(int), |
| 338 | GFP_KERNEL); |
| 339 | if (!temp) |
| 340 | goto fail; |
| 341 | else |
| 342 | driver->data_ready = temp; |
| 343 | diag_add_client(i, file); |
| 344 | } else { |
| 345 | mutex_unlock(&driver->diagchar_mutex); |
| 346 | pr_err_ratelimited("diag: Max client limit for DIAG reached\n"); |
| 347 | pr_err_ratelimited("diag: Cannot open handle %s %d", |
| 348 | current->comm, current->tgid); |
| 349 | for (i = 0; i < driver->num_clients; i++) |
| 350 | pr_debug("%d) %s PID=%d", i, driver-> |
| 351 | client_map[i].name, |
| 352 | driver->client_map[i].pid); |
| 353 | return -ENOMEM; |
| 354 | } |
| 355 | } |
| 356 | driver->data_ready[i] = 0x0; |
| 357 | driver->data_ready[i] |= MSG_MASKS_TYPE; |
| 358 | driver->data_ready[i] |= EVENT_MASKS_TYPE; |
| 359 | driver->data_ready[i] |= LOG_MASKS_TYPE; |
| 360 | driver->data_ready[i] |= DCI_LOG_MASKS_TYPE; |
| 361 | driver->data_ready[i] |= DCI_EVENT_MASKS_TYPE; |
| 362 | |
| 363 | if (driver->ref_count == 0) |
| 364 | diag_mempool_init(); |
| 365 | driver->ref_count++; |
| 366 | mutex_unlock(&driver->diagchar_mutex); |
| 367 | return 0; |
| 368 | } |
| 369 | return -ENOMEM; |
| 370 | |
| 371 | fail: |
| 372 | mutex_unlock(&driver->diagchar_mutex); |
| 373 | driver->num_clients--; |
| 374 | pr_err_ratelimited("diag: Insufficient memory for new client"); |
| 375 | return -ENOMEM; |
| 376 | } |
| 377 | |
| 378 | static uint32_t diag_translate_kernel_to_user_mask(uint32_t peripheral_mask) |
| 379 | { |
| 380 | uint32_t ret = 0; |
| 381 | |
| 382 | if (peripheral_mask & MD_PERIPHERAL_MASK(APPS_DATA)) |
| 383 | ret |= DIAG_CON_APSS; |
| 384 | if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_MODEM)) |
| 385 | ret |= DIAG_CON_MPSS; |
| 386 | if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_LPASS)) |
| 387 | ret |= DIAG_CON_LPASS; |
| 388 | if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_WCNSS)) |
| 389 | ret |= DIAG_CON_WCNSS; |
| 390 | if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_SENSORS)) |
| 391 | ret |= DIAG_CON_SENSORS; |
| 392 | if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_WDSP)) |
| 393 | ret |= DIAG_CON_WDSP; |
Sreelakshmi Gownipalli | 588a31d | 2016-11-02 13:33:43 -0700 | [diff] [blame] | 394 | if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_CDSP)) |
| 395 | ret |= DIAG_CON_CDSP; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 396 | |
| 397 | return ret; |
| 398 | } |
Manoj Prabhu B | 95427a2 | 2016-11-04 11:58:11 +0530 | [diff] [blame] | 399 | int diag_mask_param(void) |
| 400 | { |
| 401 | return diag_mask_clear_param; |
| 402 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 403 | void diag_clear_masks(struct diag_md_session_t *info) |
| 404 | { |
| 405 | int ret; |
| 406 | char cmd_disable_log_mask[] = { 0x73, 0, 0, 0, 0, 0, 0, 0}; |
| 407 | char cmd_disable_msg_mask[] = { 0x7D, 0x05, 0, 0, 0, 0, 0, 0}; |
| 408 | char cmd_disable_event_mask[] = { 0x60, 0}; |
| 409 | |
| 410 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 411 | "diag: %s: masks clear request upon %s\n", __func__, |
| 412 | ((info) ? "ODL exit" : "USB Disconnection")); |
| 413 | |
| 414 | ret = diag_process_apps_masks(cmd_disable_log_mask, |
| 415 | sizeof(cmd_disable_log_mask), info); |
| 416 | ret = diag_process_apps_masks(cmd_disable_msg_mask, |
| 417 | sizeof(cmd_disable_msg_mask), info); |
| 418 | ret = diag_process_apps_masks(cmd_disable_event_mask, |
| 419 | sizeof(cmd_disable_event_mask), info); |
| 420 | DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| 421 | "diag:%s: masks cleared successfully\n", __func__); |
| 422 | } |
| 423 | |
| 424 | static void diag_close_logging_process(const int pid) |
| 425 | { |
| 426 | int i; |
| 427 | int session_peripheral_mask; |
| 428 | struct diag_md_session_t *session_info = NULL; |
| 429 | struct diag_logging_mode_param_t params; |
| 430 | |
| 431 | session_info = diag_md_session_get_pid(pid); |
| 432 | if (!session_info) |
| 433 | return; |
| 434 | |
Manoj Prabhu B | 95427a2 | 2016-11-04 11:58:11 +0530 | [diff] [blame] | 435 | if (diag_mask_clear_param) |
| 436 | diag_clear_masks(session_info); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 437 | |
| 438 | mutex_lock(&driver->diag_maskclear_mutex); |
| 439 | driver->mask_clear = 1; |
| 440 | mutex_unlock(&driver->diag_maskclear_mutex); |
| 441 | |
Sreelakshmi Gownipalli | 078824f | 2017-01-17 14:03:54 -0800 | [diff] [blame] | 442 | mutex_lock(&driver->diagchar_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 443 | session_peripheral_mask = session_info->peripheral_mask; |
| 444 | diag_md_session_close(session_info); |
Sreelakshmi Gownipalli | 078824f | 2017-01-17 14:03:54 -0800 | [diff] [blame] | 445 | mutex_unlock(&driver->diagchar_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 446 | for (i = 0; i < NUM_MD_SESSIONS; i++) |
| 447 | if (MD_PERIPHERAL_MASK(i) & session_peripheral_mask) |
| 448 | diag_mux_close_peripheral(DIAG_LOCAL_PROC, i); |
| 449 | |
| 450 | params.req_mode = USB_MODE; |
| 451 | params.mode_param = 0; |
| 452 | params.peripheral_mask = |
| 453 | diag_translate_kernel_to_user_mask(session_peripheral_mask); |
| 454 | mutex_lock(&driver->diagchar_mutex); |
| 455 | diag_switch_logging(¶ms); |
| 456 | mutex_unlock(&driver->diagchar_mutex); |
| 457 | } |
| 458 | |
| 459 | static int diag_remove_client_entry(struct file *file) |
| 460 | { |
| 461 | int i = -1; |
| 462 | struct diagchar_priv *diagpriv_data = NULL; |
| 463 | struct diag_dci_client_tbl *dci_entry = NULL; |
| 464 | |
| 465 | if (!driver) |
| 466 | return -ENOMEM; |
| 467 | |
| 468 | mutex_lock(&driver->diag_file_mutex); |
| 469 | if (!file) { |
| 470 | DIAG_LOG(DIAG_DEBUG_USERSPACE, "Invalid file pointer\n"); |
| 471 | mutex_unlock(&driver->diag_file_mutex); |
| 472 | return -ENOENT; |
| 473 | } |
| 474 | if (!(file->private_data)) { |
| 475 | DIAG_LOG(DIAG_DEBUG_USERSPACE, "Invalid private data\n"); |
| 476 | mutex_unlock(&driver->diag_file_mutex); |
| 477 | return -EINVAL; |
| 478 | } |
| 479 | |
| 480 | diagpriv_data = file->private_data; |
| 481 | |
| 482 | /* |
| 483 | * clean up any DCI registrations, if this is a DCI client |
| 484 | * This will specially help in case of ungraceful exit of any DCI client |
| 485 | * This call will remove any pending registrations of such client |
| 486 | */ |
| 487 | mutex_lock(&driver->dci_mutex); |
| 488 | dci_entry = dci_lookup_client_entry_pid(current->tgid); |
| 489 | if (dci_entry) |
| 490 | diag_dci_deinit_client(dci_entry); |
| 491 | mutex_unlock(&driver->dci_mutex); |
| 492 | |
| 493 | diag_close_logging_process(current->tgid); |
| 494 | |
| 495 | /* Delete the pkt response table entry for the exiting process */ |
| 496 | diag_cmd_remove_reg_by_pid(current->tgid); |
| 497 | |
| 498 | mutex_lock(&driver->diagchar_mutex); |
| 499 | driver->ref_count--; |
| 500 | if (driver->ref_count == 0) |
| 501 | diag_mempool_exit(); |
| 502 | |
| 503 | for (i = 0; i < driver->num_clients; i++) { |
| 504 | if (diagpriv_data && diagpriv_data->pid == |
| 505 | driver->client_map[i].pid) { |
| 506 | driver->client_map[i].pid = 0; |
| 507 | kfree(diagpriv_data); |
| 508 | diagpriv_data = NULL; |
| 509 | file->private_data = 0; |
| 510 | break; |
| 511 | } |
| 512 | } |
| 513 | mutex_unlock(&driver->diagchar_mutex); |
| 514 | mutex_unlock(&driver->diag_file_mutex); |
| 515 | return 0; |
| 516 | } |
| 517 | static int diagchar_close(struct inode *inode, struct file *file) |
| 518 | { |
| 519 | int ret; |
| 520 | |
| 521 | DIAG_LOG(DIAG_DEBUG_USERSPACE, "diag: process exit %s\n", |
| 522 | current->comm); |
| 523 | ret = diag_remove_client_entry(file); |
| 524 | mutex_lock(&driver->diag_maskclear_mutex); |
| 525 | driver->mask_clear = 0; |
| 526 | mutex_unlock(&driver->diag_maskclear_mutex); |
| 527 | return ret; |
| 528 | } |
| 529 | |
| 530 | void diag_record_stats(int type, int flag) |
| 531 | { |
| 532 | struct diag_pkt_stats_t *pkt_stats = NULL; |
| 533 | |
| 534 | switch (type) { |
| 535 | case DATA_TYPE_EVENT: |
| 536 | pkt_stats = &driver->event_stats; |
| 537 | break; |
| 538 | case DATA_TYPE_F3: |
| 539 | pkt_stats = &driver->msg_stats; |
| 540 | break; |
| 541 | case DATA_TYPE_LOG: |
| 542 | pkt_stats = &driver->log_stats; |
| 543 | break; |
| 544 | case DATA_TYPE_RESPONSE: |
| 545 | if (flag != PKT_DROP) |
| 546 | return; |
| 547 | pr_err_ratelimited("diag: In %s, dropping response. This shouldn't happen\n", |
| 548 | __func__); |
| 549 | return; |
| 550 | case DATA_TYPE_DELAYED_RESPONSE: |
| 551 | /* No counters to increase for Delayed responses */ |
| 552 | return; |
| 553 | default: |
| 554 | pr_err_ratelimited("diag: In %s, invalid pkt_type: %d\n", |
| 555 | __func__, type); |
| 556 | return; |
| 557 | } |
| 558 | |
| 559 | switch (flag) { |
| 560 | case PKT_ALLOC: |
| 561 | atomic_add(1, (atomic_t *)&pkt_stats->alloc_count); |
| 562 | break; |
| 563 | case PKT_DROP: |
| 564 | atomic_add(1, (atomic_t *)&pkt_stats->drop_count); |
| 565 | break; |
| 566 | case PKT_RESET: |
| 567 | atomic_set((atomic_t *)&pkt_stats->alloc_count, 0); |
| 568 | atomic_set((atomic_t *)&pkt_stats->drop_count, 0); |
| 569 | break; |
| 570 | default: |
| 571 | pr_err_ratelimited("diag: In %s, invalid flag: %d\n", |
| 572 | __func__, flag); |
| 573 | return; |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | void diag_get_timestamp(char *time_str) |
| 578 | { |
| 579 | struct timeval t; |
| 580 | struct tm broken_tm; |
| 581 | |
| 582 | do_gettimeofday(&t); |
| 583 | if (!time_str) |
| 584 | return; |
| 585 | time_to_tm(t.tv_sec, 0, &broken_tm); |
| 586 | scnprintf(time_str, DIAG_TS_SIZE, "%d:%d:%d:%ld", broken_tm.tm_hour, |
| 587 | broken_tm.tm_min, broken_tm.tm_sec, t.tv_usec); |
| 588 | } |
| 589 | |
| 590 | int diag_get_remote(int remote_info) |
| 591 | { |
| 592 | int val = (remote_info < 0) ? -remote_info : remote_info; |
| 593 | int remote_val; |
| 594 | |
| 595 | switch (val) { |
| 596 | case MDM: |
| 597 | case MDM2: |
| 598 | case QSC: |
| 599 | remote_val = -remote_info; |
| 600 | break; |
| 601 | default: |
| 602 | remote_val = 0; |
| 603 | break; |
| 604 | } |
| 605 | |
| 606 | return remote_val; |
| 607 | } |
| 608 | |
| 609 | int diag_cmd_chk_polling(struct diag_cmd_reg_entry_t *entry) |
| 610 | { |
| 611 | int polling = DIAG_CMD_NOT_POLLING; |
| 612 | |
| 613 | if (!entry) |
| 614 | return -EIO; |
| 615 | |
| 616 | if (entry->cmd_code == DIAG_CMD_NO_SUBSYS) { |
| 617 | if (entry->subsys_id == DIAG_CMD_NO_SUBSYS && |
| 618 | entry->cmd_code_hi >= DIAG_CMD_STATUS && |
| 619 | entry->cmd_code_lo <= DIAG_CMD_STATUS) |
| 620 | polling = DIAG_CMD_POLLING; |
| 621 | else if (entry->subsys_id == DIAG_SS_WCDMA && |
| 622 | entry->cmd_code_hi >= DIAG_CMD_QUERY_CALL && |
| 623 | entry->cmd_code_lo <= DIAG_CMD_QUERY_CALL) |
| 624 | polling = DIAG_CMD_POLLING; |
| 625 | else if (entry->subsys_id == DIAG_SS_GSM && |
| 626 | entry->cmd_code_hi >= DIAG_CMD_QUERY_TMC && |
| 627 | entry->cmd_code_lo <= DIAG_CMD_QUERY_TMC) |
| 628 | polling = DIAG_CMD_POLLING; |
| 629 | else if (entry->subsys_id == DIAG_SS_PARAMS && |
| 630 | entry->cmd_code_hi >= DIAG_DIAG_POLL && |
| 631 | entry->cmd_code_lo <= DIAG_DIAG_POLL) |
| 632 | polling = DIAG_CMD_POLLING; |
| 633 | else if (entry->subsys_id == DIAG_SS_TDSCDMA && |
| 634 | entry->cmd_code_hi >= DIAG_CMD_TDSCDMA_STATUS && |
| 635 | entry->cmd_code_lo <= DIAG_CMD_TDSCDMA_STATUS) |
| 636 | polling = DIAG_CMD_POLLING; |
| 637 | } |
| 638 | |
| 639 | return polling; |
| 640 | } |
| 641 | |
| 642 | static void diag_cmd_invalidate_polling(int change_flag) |
| 643 | { |
| 644 | int polling = DIAG_CMD_NOT_POLLING; |
| 645 | struct list_head *start; |
| 646 | struct list_head *temp; |
| 647 | struct diag_cmd_reg_t *item = NULL; |
| 648 | |
| 649 | if (change_flag == DIAG_CMD_ADD) { |
| 650 | if (driver->polling_reg_flag) |
| 651 | return; |
| 652 | } |
| 653 | |
| 654 | driver->polling_reg_flag = 0; |
| 655 | list_for_each_safe(start, temp, &driver->cmd_reg_list) { |
| 656 | item = list_entry(start, struct diag_cmd_reg_t, link); |
| 657 | polling = diag_cmd_chk_polling(&item->entry); |
| 658 | if (polling == DIAG_CMD_POLLING) { |
| 659 | driver->polling_reg_flag = 1; |
| 660 | break; |
| 661 | } |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | int diag_cmd_add_reg(struct diag_cmd_reg_entry_t *new_entry, uint8_t proc, |
| 666 | int pid) |
| 667 | { |
| 668 | struct diag_cmd_reg_t *new_item = NULL; |
| 669 | |
| 670 | if (!new_entry) { |
| 671 | pr_err("diag: In %s, invalid new entry\n", __func__); |
| 672 | return -EINVAL; |
| 673 | } |
| 674 | |
| 675 | if (proc > APPS_DATA) { |
| 676 | pr_err("diag: In %s, invalid peripheral %d\n", __func__, proc); |
| 677 | return -EINVAL; |
| 678 | } |
| 679 | |
| 680 | if (proc != APPS_DATA) |
| 681 | pid = INVALID_PID; |
| 682 | |
| 683 | new_item = kzalloc(sizeof(struct diag_cmd_reg_t), GFP_KERNEL); |
| 684 | if (!new_item) |
| 685 | return -ENOMEM; |
| 686 | kmemleak_not_leak(new_item); |
| 687 | |
| 688 | new_item->pid = pid; |
| 689 | new_item->proc = proc; |
| 690 | memcpy(&new_item->entry, new_entry, |
| 691 | sizeof(struct diag_cmd_reg_entry_t)); |
| 692 | INIT_LIST_HEAD(&new_item->link); |
| 693 | |
| 694 | mutex_lock(&driver->cmd_reg_mutex); |
| 695 | list_add_tail(&new_item->link, &driver->cmd_reg_list); |
| 696 | driver->cmd_reg_count++; |
| 697 | diag_cmd_invalidate_polling(DIAG_CMD_ADD); |
| 698 | mutex_unlock(&driver->cmd_reg_mutex); |
| 699 | |
| 700 | return 0; |
| 701 | } |
| 702 | |
| 703 | struct diag_cmd_reg_entry_t *diag_cmd_search( |
| 704 | struct diag_cmd_reg_entry_t *entry, int proc) |
| 705 | { |
| 706 | struct list_head *start; |
| 707 | struct list_head *temp; |
| 708 | struct diag_cmd_reg_t *item = NULL; |
| 709 | struct diag_cmd_reg_entry_t *temp_entry = NULL; |
| 710 | |
| 711 | if (!entry) { |
| 712 | pr_err("diag: In %s, invalid entry\n", __func__); |
| 713 | return NULL; |
| 714 | } |
| 715 | |
| 716 | list_for_each_safe(start, temp, &driver->cmd_reg_list) { |
| 717 | item = list_entry(start, struct diag_cmd_reg_t, link); |
Manoj Prabhu B | d9b3b62 | 2017-01-17 10:15:53 +0530 | [diff] [blame] | 718 | if (&item->entry == NULL) { |
Gopikrishna Mogasati | 9b33237 | 2016-11-10 20:03:46 +0530 | [diff] [blame] | 719 | pr_err("diag: In %s, unable to search command\n", |
| 720 | __func__); |
| 721 | return NULL; |
| 722 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 723 | temp_entry = &item->entry; |
| 724 | if (temp_entry->cmd_code == entry->cmd_code && |
| 725 | temp_entry->subsys_id == entry->subsys_id && |
| 726 | temp_entry->cmd_code_hi >= entry->cmd_code_hi && |
| 727 | temp_entry->cmd_code_lo <= entry->cmd_code_lo && |
| 728 | (proc == item->proc || proc == ALL_PROC)) { |
| 729 | return &item->entry; |
| 730 | } else if (temp_entry->cmd_code == DIAG_CMD_NO_SUBSYS && |
| 731 | entry->cmd_code == DIAG_CMD_DIAG_SUBSYS) { |
| 732 | if (temp_entry->subsys_id == entry->subsys_id && |
| 733 | temp_entry->cmd_code_hi >= entry->cmd_code_hi && |
| 734 | temp_entry->cmd_code_lo <= entry->cmd_code_lo && |
| 735 | (proc == item->proc || proc == ALL_PROC)) { |
| 736 | return &item->entry; |
| 737 | } |
| 738 | } else if (temp_entry->cmd_code == DIAG_CMD_NO_SUBSYS && |
| 739 | temp_entry->subsys_id == DIAG_CMD_NO_SUBSYS) { |
| 740 | if ((temp_entry->cmd_code_hi >= entry->cmd_code) && |
| 741 | (temp_entry->cmd_code_lo <= entry->cmd_code) && |
| 742 | (proc == item->proc || proc == ALL_PROC)) { |
| 743 | if (entry->cmd_code == MODE_CMD) { |
| 744 | if (entry->subsys_id == RESET_ID && |
| 745 | item->proc != APPS_DATA) { |
| 746 | continue; |
| 747 | } |
| 748 | if (entry->subsys_id != RESET_ID && |
| 749 | item->proc == APPS_DATA) { |
| 750 | continue; |
| 751 | } |
| 752 | } |
| 753 | return &item->entry; |
| 754 | } |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | return NULL; |
| 759 | } |
| 760 | |
| 761 | void diag_cmd_remove_reg(struct diag_cmd_reg_entry_t *entry, uint8_t proc) |
| 762 | { |
| 763 | struct diag_cmd_reg_t *item = NULL; |
| 764 | struct diag_cmd_reg_entry_t *temp_entry; |
| 765 | |
| 766 | if (!entry) { |
| 767 | pr_err("diag: In %s, invalid entry\n", __func__); |
| 768 | return; |
| 769 | } |
| 770 | |
| 771 | mutex_lock(&driver->cmd_reg_mutex); |
| 772 | temp_entry = diag_cmd_search(entry, proc); |
| 773 | if (temp_entry) { |
| 774 | item = container_of(temp_entry, struct diag_cmd_reg_t, entry); |
| 775 | if (!item) { |
| 776 | mutex_unlock(&driver->cmd_reg_mutex); |
| 777 | return; |
| 778 | } |
| 779 | list_del(&item->link); |
| 780 | kfree(item); |
| 781 | driver->cmd_reg_count--; |
| 782 | } |
| 783 | diag_cmd_invalidate_polling(DIAG_CMD_REMOVE); |
| 784 | mutex_unlock(&driver->cmd_reg_mutex); |
| 785 | } |
| 786 | |
| 787 | void diag_cmd_remove_reg_by_pid(int pid) |
| 788 | { |
| 789 | struct list_head *start; |
| 790 | struct list_head *temp; |
| 791 | struct diag_cmd_reg_t *item = NULL; |
| 792 | |
| 793 | mutex_lock(&driver->cmd_reg_mutex); |
| 794 | list_for_each_safe(start, temp, &driver->cmd_reg_list) { |
| 795 | item = list_entry(start, struct diag_cmd_reg_t, link); |
| 796 | if (item->pid == pid) { |
| 797 | list_del(&item->link); |
| 798 | kfree(item); |
| 799 | driver->cmd_reg_count--; |
| 800 | } |
| 801 | } |
| 802 | mutex_unlock(&driver->cmd_reg_mutex); |
| 803 | } |
| 804 | |
| 805 | void diag_cmd_remove_reg_by_proc(int proc) |
| 806 | { |
| 807 | struct list_head *start; |
| 808 | struct list_head *temp; |
| 809 | struct diag_cmd_reg_t *item = NULL; |
| 810 | |
| 811 | mutex_lock(&driver->cmd_reg_mutex); |
| 812 | list_for_each_safe(start, temp, &driver->cmd_reg_list) { |
| 813 | item = list_entry(start, struct diag_cmd_reg_t, link); |
| 814 | if (item->proc == proc) { |
| 815 | list_del(&item->link); |
| 816 | kfree(item); |
| 817 | driver->cmd_reg_count--; |
| 818 | } |
| 819 | } |
| 820 | diag_cmd_invalidate_polling(DIAG_CMD_REMOVE); |
| 821 | mutex_unlock(&driver->cmd_reg_mutex); |
| 822 | } |
| 823 | |
| 824 | static int diag_copy_dci(char __user *buf, size_t count, |
| 825 | struct diag_dci_client_tbl *entry, int *pret) |
| 826 | { |
| 827 | int total_data_len = 0; |
| 828 | int ret = 0; |
| 829 | int exit_stat = 1; |
| 830 | uint8_t drain_again = 0; |
| 831 | struct diag_dci_buffer_t *buf_entry, *temp; |
| 832 | |
| 833 | if (!buf || !entry || !pret) |
| 834 | return exit_stat; |
| 835 | |
| 836 | ret = *pret; |
| 837 | |
| 838 | ret += sizeof(int); |
| 839 | if (ret >= count) { |
| 840 | pr_err("diag: In %s, invalid value for ret: %d, count: %zu\n", |
| 841 | __func__, ret, count); |
| 842 | return -EINVAL; |
| 843 | } |
| 844 | |
| 845 | mutex_lock(&entry->write_buf_mutex); |
| 846 | list_for_each_entry_safe(buf_entry, temp, &entry->list_write_buf, |
| 847 | buf_track) { |
| 848 | |
| 849 | if ((ret + buf_entry->data_len) > count) { |
| 850 | drain_again = 1; |
| 851 | break; |
| 852 | } |
| 853 | |
| 854 | list_del(&buf_entry->buf_track); |
| 855 | mutex_lock(&buf_entry->data_mutex); |
| 856 | if ((buf_entry->data_len > 0) && |
| 857 | (buf_entry->in_busy) && |
| 858 | (buf_entry->data)) { |
| 859 | if (copy_to_user(buf+ret, (void *)buf_entry->data, |
| 860 | buf_entry->data_len)) |
| 861 | goto drop; |
| 862 | ret += buf_entry->data_len; |
| 863 | total_data_len += buf_entry->data_len; |
| 864 | diag_ws_on_copy(DIAG_WS_DCI); |
| 865 | drop: |
| 866 | buf_entry->in_busy = 0; |
| 867 | buf_entry->data_len = 0; |
| 868 | buf_entry->in_list = 0; |
| 869 | if (buf_entry->buf_type == DCI_BUF_CMD) { |
| 870 | mutex_unlock(&buf_entry->data_mutex); |
| 871 | continue; |
| 872 | } else if (buf_entry->buf_type == DCI_BUF_SECONDARY) { |
| 873 | diagmem_free(driver, buf_entry->data, |
| 874 | POOL_TYPE_DCI); |
| 875 | buf_entry->data = NULL; |
| 876 | mutex_unlock(&buf_entry->data_mutex); |
| 877 | kfree(buf_entry); |
| 878 | continue; |
| 879 | } |
| 880 | |
| 881 | } |
| 882 | mutex_unlock(&buf_entry->data_mutex); |
| 883 | } |
| 884 | |
| 885 | if (total_data_len > 0) { |
| 886 | /* Copy the total data length */ |
| 887 | COPY_USER_SPACE_OR_ERR(buf+8, total_data_len, 4); |
| 888 | if (ret == -EFAULT) |
| 889 | goto exit; |
| 890 | ret -= 4; |
| 891 | } else { |
| 892 | pr_debug("diag: In %s, Trying to copy ZERO bytes, total_data_len: %d\n", |
| 893 | __func__, total_data_len); |
| 894 | } |
| 895 | |
| 896 | exit_stat = 0; |
| 897 | exit: |
| 898 | entry->in_service = 0; |
| 899 | mutex_unlock(&entry->write_buf_mutex); |
| 900 | *pret = ret; |
| 901 | if (drain_again) |
| 902 | dci_drain_data(0); |
| 903 | |
| 904 | return exit_stat; |
| 905 | } |
| 906 | |
| 907 | #ifdef CONFIG_DIAGFWD_BRIDGE_CODE |
| 908 | static int diag_remote_init(void) |
| 909 | { |
| 910 | diagmem_setsize(POOL_TYPE_MDM, itemsize_mdm, poolsize_mdm); |
| 911 | diagmem_setsize(POOL_TYPE_MDM2, itemsize_mdm, poolsize_mdm); |
| 912 | diagmem_setsize(POOL_TYPE_MDM_DCI, itemsize_mdm_dci, poolsize_mdm_dci); |
| 913 | diagmem_setsize(POOL_TYPE_MDM2_DCI, itemsize_mdm_dci, |
| 914 | poolsize_mdm_dci); |
| 915 | diagmem_setsize(POOL_TYPE_MDM_MUX, itemsize_mdm_usb, poolsize_mdm_usb); |
| 916 | diagmem_setsize(POOL_TYPE_MDM2_MUX, itemsize_mdm_usb, poolsize_mdm_usb); |
| 917 | diagmem_setsize(POOL_TYPE_MDM_DCI_WRITE, itemsize_mdm_dci_write, |
| 918 | poolsize_mdm_dci_write); |
| 919 | diagmem_setsize(POOL_TYPE_MDM2_DCI_WRITE, itemsize_mdm_dci_write, |
| 920 | poolsize_mdm_dci_write); |
| 921 | diagmem_setsize(POOL_TYPE_QSC_MUX, itemsize_qsc_usb, |
| 922 | poolsize_qsc_usb); |
| 923 | driver->hdlc_encode_buf = kzalloc(DIAG_MAX_HDLC_BUF_SIZE, GFP_KERNEL); |
| 924 | if (!driver->hdlc_encode_buf) |
| 925 | return -ENOMEM; |
| 926 | driver->hdlc_encode_buf_len = 0; |
| 927 | return 0; |
| 928 | } |
| 929 | |
| 930 | static void diag_remote_exit(void) |
| 931 | { |
| 932 | kfree(driver->hdlc_encode_buf); |
| 933 | } |
| 934 | |
| 935 | static int diag_send_raw_data_remote(int proc, void *buf, int len, |
| 936 | uint8_t hdlc_flag) |
| 937 | { |
| 938 | int err = 0; |
| 939 | int max_len = 0; |
| 940 | uint8_t retry_count = 0; |
| 941 | uint8_t max_retries = 3; |
| 942 | uint16_t payload = 0; |
| 943 | struct diag_send_desc_type send = { NULL, NULL, DIAG_STATE_START, 0 }; |
| 944 | struct diag_hdlc_dest_type enc = { NULL, NULL, 0 }; |
| 945 | int bridge_index = proc - 1; |
| 946 | struct diag_md_session_t *session_info = NULL; |
| 947 | uint8_t hdlc_disabled = 0; |
| 948 | |
| 949 | if (!buf) |
| 950 | return -EINVAL; |
| 951 | |
| 952 | if (len <= 0) { |
| 953 | pr_err("diag: In %s, invalid len: %d", __func__, len); |
| 954 | return -EBADMSG; |
| 955 | } |
| 956 | |
| 957 | if (bridge_index < 0 || bridge_index > NUM_REMOTE_DEV) { |
| 958 | pr_err("diag: In %s, invalid bridge index: %d\n", __func__, |
| 959 | bridge_index); |
| 960 | return -EINVAL; |
| 961 | } |
| 962 | |
| 963 | do { |
| 964 | if (driver->hdlc_encode_buf_len == 0) |
| 965 | break; |
| 966 | usleep_range(10000, 10100); |
| 967 | retry_count++; |
| 968 | } while (retry_count < max_retries); |
| 969 | |
| 970 | if (driver->hdlc_encode_buf_len != 0) |
| 971 | return -EAGAIN; |
| 972 | session_info = diag_md_session_get_peripheral(APPS_DATA); |
| 973 | if (session_info) |
| 974 | hdlc_disabled = session_info->hdlc_disabled; |
| 975 | else |
| 976 | hdlc_disabled = driver->hdlc_disabled; |
| 977 | if (hdlc_disabled) { |
| 978 | payload = *(uint16_t *)(buf + 2); |
Gopikrishna Mogasati | 810223f | 2017-04-20 16:25:20 +0530 | [diff] [blame^] | 979 | if (payload > DIAG_MAX_HDLC_BUF_SIZE) { |
| 980 | pr_err("diag: Dropping packet, payload size is %d\n", |
| 981 | payload); |
| 982 | return -EBADMSG; |
| 983 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 984 | driver->hdlc_encode_buf_len = payload; |
| 985 | /* |
| 986 | * Adding 4 bytes for start (1 byte), version (1 byte) and |
| 987 | * payload (2 bytes) |
| 988 | */ |
| 989 | memcpy(driver->hdlc_encode_buf, buf + 4, payload); |
| 990 | goto send_data; |
| 991 | } |
| 992 | |
| 993 | if (hdlc_flag) { |
| 994 | if (len > DIAG_MAX_HDLC_BUF_SIZE) { |
| 995 | pr_err("diag: Dropping packet, HDLC encoded packet payload size crosses buffer limit. Current payload size %d\n", |
| 996 | len); |
| 997 | return -EBADMSG; |
| 998 | } |
| 999 | driver->hdlc_encode_buf_len = len; |
| 1000 | memcpy(driver->hdlc_encode_buf, buf, len); |
| 1001 | goto send_data; |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * The worst case length will be twice as the incoming packet length. |
| 1006 | * Add 3 bytes for CRC bytes (2 bytes) and delimiter (1 byte) |
| 1007 | */ |
| 1008 | max_len = (2 * len) + 3; |
| 1009 | if (max_len > DIAG_MAX_HDLC_BUF_SIZE) { |
| 1010 | pr_err("diag: Dropping packet, HDLC encoded packet payload size crosses buffer limit. Current payload size %d\n", |
| 1011 | max_len); |
| 1012 | return -EBADMSG; |
| 1013 | } |
| 1014 | |
| 1015 | /* Perform HDLC encoding on incoming data */ |
| 1016 | send.state = DIAG_STATE_START; |
| 1017 | send.pkt = (void *)(buf); |
| 1018 | send.last = (void *)(buf + len - 1); |
| 1019 | send.terminate = 1; |
| 1020 | |
| 1021 | enc.dest = driver->hdlc_encode_buf; |
| 1022 | enc.dest_last = (void *)(driver->hdlc_encode_buf + max_len - 1); |
| 1023 | diag_hdlc_encode(&send, &enc); |
| 1024 | driver->hdlc_encode_buf_len = (int)(enc.dest - |
| 1025 | (void *)driver->hdlc_encode_buf); |
| 1026 | |
| 1027 | send_data: |
| 1028 | err = diagfwd_bridge_write(bridge_index, driver->hdlc_encode_buf, |
| 1029 | driver->hdlc_encode_buf_len); |
| 1030 | if (err) { |
| 1031 | pr_err_ratelimited("diag: Error writing Callback packet to proc: %d, err: %d\n", |
| 1032 | proc, err); |
| 1033 | driver->hdlc_encode_buf_len = 0; |
| 1034 | } |
| 1035 | |
| 1036 | return err; |
| 1037 | } |
| 1038 | |
| 1039 | static int diag_process_userspace_remote(int proc, void *buf, int len) |
| 1040 | { |
| 1041 | int bridge_index = proc - 1; |
| 1042 | |
| 1043 | if (!buf || len < 0) { |
| 1044 | pr_err("diag: Invalid input in %s, buf: %pK, len: %d\n", |
| 1045 | __func__, buf, len); |
| 1046 | return -EINVAL; |
| 1047 | } |
| 1048 | |
| 1049 | if (bridge_index < 0 || bridge_index > NUM_REMOTE_DEV) { |
| 1050 | pr_err("diag: In %s, invalid bridge index: %d\n", __func__, |
| 1051 | bridge_index); |
| 1052 | return -EINVAL; |
| 1053 | } |
| 1054 | |
| 1055 | driver->user_space_data_busy = 1; |
| 1056 | return diagfwd_bridge_write(bridge_index, buf, len); |
| 1057 | } |
| 1058 | #else |
| 1059 | static int diag_remote_init(void) |
| 1060 | { |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
| 1064 | static void diag_remote_exit(void) |
| 1065 | { |
| 1066 | } |
| 1067 | |
| 1068 | int diagfwd_bridge_init(void) |
| 1069 | { |
| 1070 | return 0; |
| 1071 | } |
| 1072 | |
| 1073 | void diagfwd_bridge_exit(void) |
| 1074 | { |
| 1075 | } |
| 1076 | |
| 1077 | uint16_t diag_get_remote_device_mask(void) |
| 1078 | { |
| 1079 | return 0; |
| 1080 | } |
| 1081 | |
| 1082 | static int diag_send_raw_data_remote(int proc, void *buf, int len, |
| 1083 | uint8_t hdlc_flag) |
| 1084 | { |
| 1085 | return -EINVAL; |
| 1086 | } |
| 1087 | |
| 1088 | static int diag_process_userspace_remote(int proc, void *buf, int len) |
| 1089 | { |
| 1090 | return 0; |
| 1091 | } |
| 1092 | #endif |
| 1093 | |
| 1094 | static int mask_request_validate(unsigned char mask_buf[]) |
| 1095 | { |
| 1096 | uint8_t packet_id; |
| 1097 | uint8_t subsys_id; |
| 1098 | uint16_t ss_cmd; |
| 1099 | |
| 1100 | packet_id = mask_buf[0]; |
| 1101 | |
| 1102 | if (packet_id == DIAG_CMD_DIAG_SUBSYS_DELAY) { |
| 1103 | subsys_id = mask_buf[1]; |
| 1104 | ss_cmd = *(uint16_t *)(mask_buf + 2); |
| 1105 | switch (subsys_id) { |
| 1106 | case DIAG_SS_DIAG: |
| 1107 | if ((ss_cmd == DIAG_SS_FILE_READ_MODEM) || |
| 1108 | (ss_cmd == DIAG_SS_FILE_READ_ADSP) || |
| 1109 | (ss_cmd == DIAG_SS_FILE_READ_WCNSS) || |
| 1110 | (ss_cmd == DIAG_SS_FILE_READ_SLPI) || |
| 1111 | (ss_cmd == DIAG_SS_FILE_READ_APPS)) |
| 1112 | return 1; |
| 1113 | break; |
| 1114 | default: |
| 1115 | return 0; |
| 1116 | } |
| 1117 | } else if (packet_id == 0x4B) { |
| 1118 | subsys_id = mask_buf[1]; |
| 1119 | ss_cmd = *(uint16_t *)(mask_buf + 2); |
| 1120 | /* Packets with SSID which are allowed */ |
| 1121 | switch (subsys_id) { |
| 1122 | case 0x04: /* DIAG_SUBSYS_WCDMA */ |
| 1123 | if ((ss_cmd == 0) || (ss_cmd == 0xF)) |
| 1124 | return 1; |
| 1125 | break; |
| 1126 | case 0x08: /* DIAG_SUBSYS_GSM */ |
| 1127 | if ((ss_cmd == 0) || (ss_cmd == 0x1)) |
| 1128 | return 1; |
| 1129 | break; |
| 1130 | case 0x09: /* DIAG_SUBSYS_UMTS */ |
| 1131 | case 0x0F: /* DIAG_SUBSYS_CM */ |
| 1132 | if (ss_cmd == 0) |
| 1133 | return 1; |
| 1134 | break; |
| 1135 | case 0x0C: /* DIAG_SUBSYS_OS */ |
| 1136 | if ((ss_cmd == 2) || (ss_cmd == 0x100)) |
| 1137 | return 1; /* MPU and APU */ |
| 1138 | break; |
| 1139 | case 0x12: /* DIAG_SUBSYS_DIAG_SERV */ |
| 1140 | if ((ss_cmd == 0) || (ss_cmd == 0x6) || (ss_cmd == 0x7)) |
| 1141 | return 1; |
| 1142 | else if (ss_cmd == 0x218) /* HDLC Disabled Command*/ |
| 1143 | return 0; |
| 1144 | else if (ss_cmd == DIAG_GET_TIME_API) |
| 1145 | return 1; |
| 1146 | else if (ss_cmd == DIAG_SET_TIME_API) |
| 1147 | return 1; |
| 1148 | else if (ss_cmd == DIAG_SWITCH_COMMAND) |
| 1149 | return 1; |
| 1150 | else if (ss_cmd == DIAG_BUFFERING_MODE) |
| 1151 | return 1; |
| 1152 | break; |
| 1153 | case 0x13: /* DIAG_SUBSYS_FS */ |
| 1154 | if ((ss_cmd == 0) || (ss_cmd == 0x1)) |
| 1155 | return 1; |
| 1156 | break; |
| 1157 | default: |
| 1158 | return 0; |
| 1159 | } |
| 1160 | } else { |
| 1161 | switch (packet_id) { |
| 1162 | case 0x00: /* Version Number */ |
| 1163 | case 0x0C: /* CDMA status packet */ |
| 1164 | case 0x1C: /* Diag Version */ |
| 1165 | case 0x1D: /* Time Stamp */ |
| 1166 | case 0x60: /* Event Report Control */ |
| 1167 | case 0x63: /* Status snapshot */ |
| 1168 | case 0x73: /* Logging Configuration */ |
| 1169 | case 0x7C: /* Extended build ID */ |
| 1170 | case 0x7D: /* Extended Message configuration */ |
| 1171 | case 0x81: /* Event get mask */ |
| 1172 | case 0x82: /* Set the event mask */ |
| 1173 | return 1; |
| 1174 | default: |
| 1175 | return 0; |
| 1176 | } |
| 1177 | } |
| 1178 | return 0; |
| 1179 | } |
| 1180 | |
| 1181 | static void diag_md_session_init(void) |
| 1182 | { |
| 1183 | int i; |
| 1184 | |
| 1185 | mutex_init(&driver->md_session_lock); |
| 1186 | driver->md_session_mask = 0; |
| 1187 | driver->md_session_mode = DIAG_MD_NONE; |
| 1188 | for (i = 0; i < NUM_MD_SESSIONS; i++) |
| 1189 | driver->md_session_map[i] = NULL; |
| 1190 | } |
| 1191 | |
| 1192 | static void diag_md_session_exit(void) |
| 1193 | { |
| 1194 | int i; |
| 1195 | struct diag_md_session_t *session_info = NULL; |
| 1196 | |
| 1197 | for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| 1198 | if (driver->md_session_map[i]) { |
| 1199 | session_info = driver->md_session_map[i]; |
| 1200 | diag_log_mask_free(session_info->log_mask); |
| 1201 | kfree(session_info->log_mask); |
| 1202 | session_info->log_mask = NULL; |
| 1203 | diag_msg_mask_free(session_info->msg_mask); |
| 1204 | kfree(session_info->msg_mask); |
| 1205 | session_info->msg_mask = NULL; |
| 1206 | diag_event_mask_free(session_info->event_mask); |
| 1207 | kfree(session_info->event_mask); |
| 1208 | session_info->event_mask = NULL; |
| 1209 | kfree(session_info); |
| 1210 | session_info = NULL; |
| 1211 | driver->md_session_map[i] = NULL; |
| 1212 | } |
| 1213 | } |
| 1214 | mutex_destroy(&driver->md_session_lock); |
| 1215 | driver->md_session_mask = 0; |
| 1216 | driver->md_session_mode = DIAG_MD_NONE; |
| 1217 | } |
| 1218 | |
| 1219 | int diag_md_session_create(int mode, int peripheral_mask, int proc) |
| 1220 | { |
| 1221 | int i; |
| 1222 | int err = 0; |
| 1223 | struct diag_md_session_t *new_session = NULL; |
| 1224 | |
| 1225 | /* |
| 1226 | * If a session is running with a peripheral mask and a new session |
| 1227 | * request comes in with same peripheral mask value then return |
| 1228 | * invalid param |
| 1229 | */ |
| 1230 | if (driver->md_session_mode == DIAG_MD_PERIPHERAL && |
| 1231 | (driver->md_session_mask & peripheral_mask) != 0) |
| 1232 | return -EINVAL; |
| 1233 | |
| 1234 | mutex_lock(&driver->md_session_lock); |
| 1235 | new_session = kzalloc(sizeof(struct diag_md_session_t), GFP_KERNEL); |
| 1236 | if (!new_session) { |
| 1237 | mutex_unlock(&driver->md_session_lock); |
| 1238 | return -ENOMEM; |
| 1239 | } |
| 1240 | |
| 1241 | new_session->peripheral_mask = 0; |
| 1242 | new_session->pid = current->tgid; |
| 1243 | new_session->task = current; |
| 1244 | |
| 1245 | new_session->log_mask = kzalloc(sizeof(struct diag_mask_info), |
| 1246 | GFP_KERNEL); |
| 1247 | if (!new_session->log_mask) { |
| 1248 | err = -ENOMEM; |
| 1249 | goto fail_peripheral; |
| 1250 | } |
| 1251 | new_session->event_mask = kzalloc(sizeof(struct diag_mask_info), |
| 1252 | GFP_KERNEL); |
| 1253 | if (!new_session->event_mask) { |
| 1254 | err = -ENOMEM; |
| 1255 | goto fail_peripheral; |
| 1256 | } |
| 1257 | new_session->msg_mask = kzalloc(sizeof(struct diag_mask_info), |
| 1258 | GFP_KERNEL); |
| 1259 | if (!new_session->msg_mask) { |
| 1260 | err = -ENOMEM; |
| 1261 | goto fail_peripheral; |
| 1262 | } |
| 1263 | |
| 1264 | err = diag_log_mask_copy(new_session->log_mask, &log_mask); |
| 1265 | if (err) { |
| 1266 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1267 | "return value of log copy. err %d\n", err); |
| 1268 | goto fail_peripheral; |
| 1269 | } |
| 1270 | err = diag_event_mask_copy(new_session->event_mask, &event_mask); |
| 1271 | if (err) { |
| 1272 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1273 | "return value of event copy. err %d\n", err); |
| 1274 | goto fail_peripheral; |
| 1275 | } |
| 1276 | err = diag_msg_mask_copy(new_session->msg_mask, &msg_mask); |
| 1277 | if (err) { |
| 1278 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1279 | "return value of msg copy. err %d\n", err); |
| 1280 | goto fail_peripheral; |
| 1281 | } |
| 1282 | for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| 1283 | if ((MD_PERIPHERAL_MASK(i) & peripheral_mask) == 0) |
| 1284 | continue; |
| 1285 | if (driver->md_session_map[i] != NULL) { |
| 1286 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1287 | "another instance present for %d\n", i); |
| 1288 | err = -EEXIST; |
| 1289 | goto fail_peripheral; |
| 1290 | } |
| 1291 | new_session->peripheral_mask |= MD_PERIPHERAL_MASK(i); |
| 1292 | driver->md_session_map[i] = new_session; |
| 1293 | driver->md_session_mask |= MD_PERIPHERAL_MASK(i); |
| 1294 | } |
| 1295 | setup_timer(&new_session->hdlc_reset_timer, |
| 1296 | diag_md_hdlc_reset_timer_func, |
| 1297 | new_session->pid); |
| 1298 | |
| 1299 | driver->md_session_mode = DIAG_MD_PERIPHERAL; |
| 1300 | mutex_unlock(&driver->md_session_lock); |
| 1301 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1302 | "created session in peripheral mode\n"); |
| 1303 | return 0; |
| 1304 | |
| 1305 | fail_peripheral: |
| 1306 | diag_log_mask_free(new_session->log_mask); |
| 1307 | kfree(new_session->log_mask); |
| 1308 | new_session->log_mask = NULL; |
| 1309 | diag_event_mask_free(new_session->event_mask); |
| 1310 | kfree(new_session->event_mask); |
| 1311 | new_session->event_mask = NULL; |
| 1312 | diag_msg_mask_free(new_session->msg_mask); |
| 1313 | kfree(new_session->msg_mask); |
| 1314 | new_session->msg_mask = NULL; |
| 1315 | kfree(new_session); |
| 1316 | new_session = NULL; |
| 1317 | mutex_unlock(&driver->md_session_lock); |
| 1318 | return err; |
| 1319 | } |
| 1320 | |
| 1321 | static void diag_md_session_close(struct diag_md_session_t *session_info) |
| 1322 | { |
| 1323 | int i; |
| 1324 | uint8_t found = 0; |
| 1325 | |
| 1326 | if (!session_info) |
| 1327 | return; |
| 1328 | |
| 1329 | mutex_lock(&driver->md_session_lock); |
| 1330 | for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| 1331 | if (driver->md_session_map[i] != session_info) |
| 1332 | continue; |
| 1333 | driver->md_session_map[i] = NULL; |
| 1334 | driver->md_session_mask &= ~session_info->peripheral_mask; |
| 1335 | } |
| 1336 | diag_log_mask_free(session_info->log_mask); |
| 1337 | kfree(session_info->log_mask); |
| 1338 | session_info->log_mask = NULL; |
| 1339 | diag_msg_mask_free(session_info->msg_mask); |
| 1340 | kfree(session_info->msg_mask); |
| 1341 | session_info->msg_mask = NULL; |
| 1342 | diag_event_mask_free(session_info->event_mask); |
| 1343 | kfree(session_info->event_mask); |
| 1344 | session_info->event_mask = NULL; |
| 1345 | del_timer(&session_info->hdlc_reset_timer); |
| 1346 | |
| 1347 | for (i = 0; i < NUM_MD_SESSIONS && !found; i++) { |
| 1348 | if (driver->md_session_map[i] != NULL) |
| 1349 | found = 1; |
| 1350 | } |
| 1351 | |
| 1352 | driver->md_session_mode = (found) ? DIAG_MD_PERIPHERAL : DIAG_MD_NONE; |
| 1353 | kfree(session_info); |
| 1354 | session_info = NULL; |
| 1355 | mutex_unlock(&driver->md_session_lock); |
| 1356 | DIAG_LOG(DIAG_DEBUG_USERSPACE, "cleared up session\n"); |
| 1357 | } |
| 1358 | |
| 1359 | struct diag_md_session_t *diag_md_session_get_pid(int pid) |
| 1360 | { |
| 1361 | int i; |
| 1362 | |
| 1363 | for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| 1364 | if (driver->md_session_map[i] && |
| 1365 | driver->md_session_map[i]->pid == pid) |
| 1366 | return driver->md_session_map[i]; |
| 1367 | } |
| 1368 | return NULL; |
| 1369 | } |
| 1370 | |
| 1371 | struct diag_md_session_t *diag_md_session_get_peripheral(uint8_t peripheral) |
| 1372 | { |
| 1373 | if (peripheral >= NUM_MD_SESSIONS) |
| 1374 | return NULL; |
| 1375 | return driver->md_session_map[peripheral]; |
| 1376 | } |
| 1377 | |
| 1378 | static int diag_md_peripheral_switch(struct diag_md_session_t *session_info, |
| 1379 | int peripheral_mask, int req_mode) { |
| 1380 | int i, bit = 0; |
| 1381 | |
| 1382 | if (!session_info) |
| 1383 | return -EINVAL; |
| 1384 | if (req_mode != DIAG_USB_MODE || req_mode != DIAG_MEMORY_DEVICE_MODE) |
| 1385 | return -EINVAL; |
| 1386 | |
| 1387 | /* |
| 1388 | * check that md_session_map for i == session_info, |
| 1389 | * if not then race condition occurred and bail |
| 1390 | */ |
| 1391 | mutex_lock(&driver->md_session_lock); |
| 1392 | for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| 1393 | bit = MD_PERIPHERAL_MASK(i) & peripheral_mask; |
| 1394 | if (!bit) |
| 1395 | continue; |
| 1396 | if (req_mode == DIAG_USB_MODE) { |
| 1397 | if (driver->md_session_map[i] != session_info) { |
| 1398 | mutex_unlock(&driver->md_session_lock); |
| 1399 | return -EINVAL; |
| 1400 | } |
| 1401 | driver->md_session_map[i] = NULL; |
| 1402 | driver->md_session_mask &= ~bit; |
| 1403 | session_info->peripheral_mask &= ~bit; |
| 1404 | |
| 1405 | } else { |
| 1406 | if (driver->md_session_map[i] != NULL) { |
| 1407 | mutex_unlock(&driver->md_session_lock); |
| 1408 | return -EINVAL; |
| 1409 | } |
| 1410 | driver->md_session_map[i] = session_info; |
| 1411 | driver->md_session_mask |= bit; |
| 1412 | session_info->peripheral_mask |= bit; |
| 1413 | |
| 1414 | } |
| 1415 | } |
| 1416 | |
| 1417 | driver->md_session_mode = DIAG_MD_PERIPHERAL; |
| 1418 | mutex_unlock(&driver->md_session_lock); |
| 1419 | DIAG_LOG(DIAG_DEBUG_USERSPACE, "Changed Peripherals:0x%x to mode:%d\n", |
| 1420 | peripheral_mask, req_mode); |
| 1421 | } |
| 1422 | |
| 1423 | static int diag_md_session_check(int curr_mode, int req_mode, |
| 1424 | const struct diag_logging_mode_param_t *param, |
| 1425 | uint8_t *change_mode) |
| 1426 | { |
| 1427 | int i, bit = 0, err = 0; |
| 1428 | int change_mask = 0; |
| 1429 | struct diag_md_session_t *session_info = NULL; |
| 1430 | |
| 1431 | if (!param || !change_mode) |
| 1432 | return -EIO; |
| 1433 | |
| 1434 | *change_mode = 0; |
| 1435 | |
| 1436 | switch (curr_mode) { |
| 1437 | case DIAG_USB_MODE: |
| 1438 | case DIAG_MEMORY_DEVICE_MODE: |
| 1439 | case DIAG_MULTI_MODE: |
| 1440 | break; |
| 1441 | default: |
| 1442 | return -EINVAL; |
| 1443 | } |
| 1444 | |
| 1445 | if (req_mode != DIAG_USB_MODE && req_mode != DIAG_MEMORY_DEVICE_MODE) |
| 1446 | return -EINVAL; |
| 1447 | |
| 1448 | if (req_mode == DIAG_USB_MODE) { |
| 1449 | if (curr_mode == DIAG_USB_MODE) |
| 1450 | return 0; |
| 1451 | if (driver->md_session_mode == DIAG_MD_NONE |
| 1452 | && driver->md_session_mask == 0 && driver->logging_mask) { |
| 1453 | *change_mode = 1; |
| 1454 | return 0; |
| 1455 | } |
| 1456 | |
| 1457 | /* |
| 1458 | * curr_mode is either DIAG_MULTI_MODE or DIAG_MD_MODE |
| 1459 | * Check if requested peripherals are already in usb mode |
| 1460 | */ |
| 1461 | for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| 1462 | bit = MD_PERIPHERAL_MASK(i) & param->peripheral_mask; |
| 1463 | if (!bit) |
| 1464 | continue; |
| 1465 | if (bit & driver->logging_mask) |
| 1466 | change_mask |= bit; |
| 1467 | } |
| 1468 | if (!change_mask) |
| 1469 | return 0; |
| 1470 | |
| 1471 | /* |
| 1472 | * Change is needed. Check if this md_session has set all the |
| 1473 | * requested peripherals. If another md session set a requested |
| 1474 | * peripheral then we cannot switch that peripheral to USB. |
| 1475 | * If this session owns all the requested peripherals, then |
| 1476 | * call function to switch the modes/masks for the md_session |
| 1477 | */ |
| 1478 | session_info = diag_md_session_get_pid(current->tgid); |
| 1479 | if (!session_info) { |
| 1480 | *change_mode = 1; |
| 1481 | return 0; |
| 1482 | } |
| 1483 | if ((change_mask & session_info->peripheral_mask) |
| 1484 | != change_mask) { |
| 1485 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1486 | "Another MD Session owns a requested peripheral\n"); |
| 1487 | return -EINVAL; |
| 1488 | } |
| 1489 | *change_mode = 1; |
| 1490 | |
| 1491 | /* If all peripherals are being set to USB Mode, call close */ |
| 1492 | if (~change_mask & session_info->peripheral_mask) { |
| 1493 | err = diag_md_peripheral_switch(session_info, |
| 1494 | change_mask, DIAG_USB_MODE); |
| 1495 | } else |
| 1496 | diag_md_session_close(session_info); |
| 1497 | |
| 1498 | return err; |
| 1499 | |
| 1500 | } else if (req_mode == DIAG_MEMORY_DEVICE_MODE) { |
| 1501 | /* |
| 1502 | * Get bit mask that represents what peripherals already have |
| 1503 | * been set. Check that requested peripherals already set are |
| 1504 | * owned by this md session |
| 1505 | */ |
| 1506 | change_mask = driver->md_session_mask & param->peripheral_mask; |
| 1507 | session_info = diag_md_session_get_pid(current->tgid); |
| 1508 | |
| 1509 | if (session_info) { |
| 1510 | if ((session_info->peripheral_mask & change_mask) |
| 1511 | != change_mask) { |
| 1512 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1513 | "Another MD Session owns a requested peripheral\n"); |
| 1514 | return -EINVAL; |
| 1515 | } |
| 1516 | err = diag_md_peripheral_switch(session_info, |
| 1517 | change_mask, DIAG_USB_MODE); |
| 1518 | } else { |
| 1519 | if (change_mask) { |
| 1520 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1521 | "Another MD Session owns a requested peripheral\n"); |
| 1522 | return -EINVAL; |
| 1523 | } |
| 1524 | err = diag_md_session_create(DIAG_MD_PERIPHERAL, |
| 1525 | param->peripheral_mask, DIAG_LOCAL_PROC); |
| 1526 | } |
| 1527 | *change_mode = 1; |
| 1528 | return err; |
| 1529 | } |
| 1530 | return -EINVAL; |
| 1531 | } |
| 1532 | |
| 1533 | static uint32_t diag_translate_mask(uint32_t peripheral_mask) |
| 1534 | { |
| 1535 | uint32_t ret = 0; |
| 1536 | |
| 1537 | if (peripheral_mask & DIAG_CON_APSS) |
| 1538 | ret |= (1 << APPS_DATA); |
| 1539 | if (peripheral_mask & DIAG_CON_MPSS) |
| 1540 | ret |= (1 << PERIPHERAL_MODEM); |
| 1541 | if (peripheral_mask & DIAG_CON_LPASS) |
| 1542 | ret |= (1 << PERIPHERAL_LPASS); |
| 1543 | if (peripheral_mask & DIAG_CON_WCNSS) |
| 1544 | ret |= (1 << PERIPHERAL_WCNSS); |
| 1545 | if (peripheral_mask & DIAG_CON_SENSORS) |
| 1546 | ret |= (1 << PERIPHERAL_SENSORS); |
| 1547 | if (peripheral_mask & DIAG_CON_WDSP) |
| 1548 | ret |= (1 << PERIPHERAL_WDSP); |
Sreelakshmi Gownipalli | 588a31d | 2016-11-02 13:33:43 -0700 | [diff] [blame] | 1549 | if (peripheral_mask & DIAG_CON_CDSP) |
| 1550 | ret |= (1 << PERIPHERAL_CDSP); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1551 | |
| 1552 | return ret; |
| 1553 | } |
| 1554 | |
| 1555 | static int diag_switch_logging(struct diag_logging_mode_param_t *param) |
| 1556 | { |
| 1557 | int new_mode; |
| 1558 | int curr_mode; |
| 1559 | int err = 0; |
| 1560 | uint8_t do_switch = 1; |
| 1561 | uint32_t peripheral_mask = 0; |
| 1562 | |
| 1563 | if (!param) |
| 1564 | return -EINVAL; |
| 1565 | |
| 1566 | if (!param->peripheral_mask) { |
| 1567 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1568 | "asking for mode switch with no peripheral mask set\n"); |
| 1569 | return -EINVAL; |
| 1570 | } |
| 1571 | |
| 1572 | peripheral_mask = diag_translate_mask(param->peripheral_mask); |
| 1573 | param->peripheral_mask = peripheral_mask; |
| 1574 | |
| 1575 | switch (param->req_mode) { |
| 1576 | case CALLBACK_MODE: |
| 1577 | case UART_MODE: |
| 1578 | case SOCKET_MODE: |
| 1579 | case MEMORY_DEVICE_MODE: |
| 1580 | new_mode = DIAG_MEMORY_DEVICE_MODE; |
| 1581 | break; |
| 1582 | case USB_MODE: |
| 1583 | new_mode = DIAG_USB_MODE; |
| 1584 | break; |
| 1585 | default: |
| 1586 | pr_err("diag: In %s, request to switch to invalid mode: %d\n", |
| 1587 | __func__, param->req_mode); |
| 1588 | return -EINVAL; |
| 1589 | } |
| 1590 | |
| 1591 | curr_mode = driver->logging_mode; |
| 1592 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1593 | "request to switch logging from %d mask:%0x to %d mask:%0x\n", |
| 1594 | curr_mode, driver->md_session_mask, new_mode, peripheral_mask); |
| 1595 | |
| 1596 | err = diag_md_session_check(curr_mode, new_mode, param, &do_switch); |
| 1597 | if (err) { |
| 1598 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1599 | "err from diag_md_session_check, err: %d\n", err); |
| 1600 | return err; |
| 1601 | } |
| 1602 | |
| 1603 | if (do_switch == 0) { |
| 1604 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1605 | "not switching modes c: %d n: %d\n", |
| 1606 | curr_mode, new_mode); |
| 1607 | return 0; |
| 1608 | } |
| 1609 | |
| 1610 | diag_ws_reset(DIAG_WS_MUX); |
| 1611 | err = diag_mux_switch_logging(&new_mode, &peripheral_mask); |
| 1612 | if (err) { |
| 1613 | pr_err("diag: In %s, unable to switch mode from %d to %d, err: %d\n", |
| 1614 | __func__, curr_mode, new_mode, err); |
| 1615 | driver->logging_mode = curr_mode; |
| 1616 | goto fail; |
| 1617 | } |
| 1618 | driver->logging_mode = new_mode; |
| 1619 | driver->logging_mask = peripheral_mask; |
| 1620 | DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| 1621 | "Switch logging to %d mask:%0x\n", new_mode, peripheral_mask); |
| 1622 | |
| 1623 | /* Update to take peripheral_mask */ |
| 1624 | if (new_mode != DIAG_MEMORY_DEVICE_MODE) { |
| 1625 | diag_update_real_time_vote(DIAG_PROC_MEMORY_DEVICE, |
| 1626 | MODE_REALTIME, ALL_PROC); |
| 1627 | } else { |
| 1628 | diag_update_proc_vote(DIAG_PROC_MEMORY_DEVICE, VOTE_UP, |
| 1629 | ALL_PROC); |
| 1630 | } |
| 1631 | |
| 1632 | if (!(new_mode == DIAG_MEMORY_DEVICE_MODE && |
| 1633 | curr_mode == DIAG_USB_MODE)) { |
| 1634 | queue_work(driver->diag_real_time_wq, |
| 1635 | &driver->diag_real_time_work); |
| 1636 | } |
| 1637 | |
| 1638 | return 0; |
| 1639 | fail: |
| 1640 | return err; |
| 1641 | } |
| 1642 | |
| 1643 | static int diag_ioctl_dci_reg(unsigned long ioarg) |
| 1644 | { |
| 1645 | int result = -EINVAL; |
| 1646 | struct diag_dci_reg_tbl_t dci_reg_params; |
| 1647 | |
| 1648 | if (copy_from_user(&dci_reg_params, (void __user *)ioarg, |
| 1649 | sizeof(struct diag_dci_reg_tbl_t))) |
| 1650 | return -EFAULT; |
| 1651 | |
| 1652 | result = diag_dci_register_client(&dci_reg_params); |
| 1653 | |
| 1654 | return result; |
| 1655 | } |
| 1656 | |
| 1657 | static int diag_ioctl_dci_health_stats(unsigned long ioarg) |
| 1658 | { |
| 1659 | int result = -EINVAL; |
| 1660 | struct diag_dci_health_stats_proc stats; |
| 1661 | |
| 1662 | if (copy_from_user(&stats, (void __user *)ioarg, |
| 1663 | sizeof(struct diag_dci_health_stats_proc))) |
| 1664 | return -EFAULT; |
| 1665 | |
| 1666 | result = diag_dci_copy_health_stats(&stats); |
| 1667 | if (result == DIAG_DCI_NO_ERROR) { |
| 1668 | if (copy_to_user((void __user *)ioarg, &stats, |
| 1669 | sizeof(struct diag_dci_health_stats_proc))) |
| 1670 | return -EFAULT; |
| 1671 | } |
| 1672 | |
| 1673 | return result; |
| 1674 | } |
| 1675 | |
| 1676 | static int diag_ioctl_dci_log_status(unsigned long ioarg) |
| 1677 | { |
| 1678 | struct diag_log_event_stats le_stats; |
| 1679 | struct diag_dci_client_tbl *dci_client = NULL; |
| 1680 | |
| 1681 | if (copy_from_user(&le_stats, (void __user *)ioarg, |
| 1682 | sizeof(struct diag_log_event_stats))) |
| 1683 | return -EFAULT; |
| 1684 | |
| 1685 | dci_client = diag_dci_get_client_entry(le_stats.client_id); |
| 1686 | if (!dci_client) |
| 1687 | return DIAG_DCI_NOT_SUPPORTED; |
| 1688 | le_stats.is_set = diag_dci_query_log_mask(dci_client, le_stats.code); |
| 1689 | if (copy_to_user((void __user *)ioarg, &le_stats, |
| 1690 | sizeof(struct diag_log_event_stats))) |
| 1691 | return -EFAULT; |
| 1692 | |
| 1693 | return DIAG_DCI_NO_ERROR; |
| 1694 | } |
| 1695 | |
| 1696 | static int diag_ioctl_dci_event_status(unsigned long ioarg) |
| 1697 | { |
| 1698 | struct diag_log_event_stats le_stats; |
| 1699 | struct diag_dci_client_tbl *dci_client = NULL; |
| 1700 | |
| 1701 | if (copy_from_user(&le_stats, (void __user *)ioarg, |
| 1702 | sizeof(struct diag_log_event_stats))) |
| 1703 | return -EFAULT; |
| 1704 | |
| 1705 | dci_client = diag_dci_get_client_entry(le_stats.client_id); |
| 1706 | if (!dci_client) |
| 1707 | return DIAG_DCI_NOT_SUPPORTED; |
| 1708 | |
| 1709 | le_stats.is_set = diag_dci_query_event_mask(dci_client, le_stats.code); |
| 1710 | if (copy_to_user((void __user *)ioarg, &le_stats, |
| 1711 | sizeof(struct diag_log_event_stats))) |
| 1712 | return -EFAULT; |
| 1713 | |
| 1714 | return DIAG_DCI_NO_ERROR; |
| 1715 | } |
| 1716 | |
| 1717 | static int diag_ioctl_lsm_deinit(void) |
| 1718 | { |
| 1719 | int i; |
| 1720 | |
Mohit Aggarwal | 9f69430 | 2017-07-06 10:16:52 +0530 | [diff] [blame] | 1721 | mutex_lock(&driver->diagchar_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1722 | for (i = 0; i < driver->num_clients; i++) |
| 1723 | if (driver->client_map[i].pid == current->tgid) |
| 1724 | break; |
| 1725 | |
Mohit Aggarwal | 9f69430 | 2017-07-06 10:16:52 +0530 | [diff] [blame] | 1726 | if (i == driver->num_clients) { |
| 1727 | mutex_unlock(&driver->diagchar_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1728 | return -EINVAL; |
Mohit Aggarwal | 9f69430 | 2017-07-06 10:16:52 +0530 | [diff] [blame] | 1729 | } |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1730 | |
| 1731 | driver->data_ready[i] |= DEINIT_TYPE; |
Mohit Aggarwal | 9f69430 | 2017-07-06 10:16:52 +0530 | [diff] [blame] | 1732 | mutex_unlock(&driver->diagchar_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 1733 | wake_up_interruptible(&driver->wait_q); |
| 1734 | |
| 1735 | return 1; |
| 1736 | } |
| 1737 | |
| 1738 | static int diag_ioctl_vote_real_time(unsigned long ioarg) |
| 1739 | { |
| 1740 | int real_time = 0; |
| 1741 | int temp_proc = ALL_PROC; |
| 1742 | struct real_time_vote_t vote; |
| 1743 | struct diag_dci_client_tbl *dci_client = NULL; |
| 1744 | |
| 1745 | if (copy_from_user(&vote, (void __user *)ioarg, |
| 1746 | sizeof(struct real_time_vote_t))) |
| 1747 | return -EFAULT; |
| 1748 | |
| 1749 | if (vote.proc > DIAG_PROC_MEMORY_DEVICE || |
| 1750 | vote.real_time_vote > MODE_UNKNOWN || |
| 1751 | vote.client_id < 0) { |
| 1752 | pr_err("diag: %s, invalid params, proc: %d, vote: %d, client_id: %d\n", |
| 1753 | __func__, vote.proc, vote.real_time_vote, |
| 1754 | vote.client_id); |
| 1755 | return -EINVAL; |
| 1756 | } |
| 1757 | |
| 1758 | driver->real_time_update_busy++; |
| 1759 | if (vote.proc == DIAG_PROC_DCI) { |
| 1760 | dci_client = diag_dci_get_client_entry(vote.client_id); |
| 1761 | if (!dci_client) { |
| 1762 | driver->real_time_update_busy--; |
| 1763 | return DIAG_DCI_NOT_SUPPORTED; |
| 1764 | } |
| 1765 | diag_dci_set_real_time(dci_client, vote.real_time_vote); |
| 1766 | real_time = diag_dci_get_cumulative_real_time( |
| 1767 | dci_client->client_info.token); |
| 1768 | diag_update_real_time_vote(vote.proc, real_time, |
| 1769 | dci_client->client_info.token); |
| 1770 | } else { |
| 1771 | real_time = vote.real_time_vote; |
| 1772 | temp_proc = vote.client_id; |
| 1773 | diag_update_real_time_vote(vote.proc, real_time, |
| 1774 | temp_proc); |
| 1775 | } |
| 1776 | queue_work(driver->diag_real_time_wq, &driver->diag_real_time_work); |
| 1777 | return 0; |
| 1778 | } |
| 1779 | |
| 1780 | static int diag_ioctl_get_real_time(unsigned long ioarg) |
| 1781 | { |
| 1782 | int i; |
| 1783 | int retry_count = 0; |
| 1784 | int timer = 0; |
| 1785 | struct real_time_query_t rt_query; |
| 1786 | |
| 1787 | if (copy_from_user(&rt_query, (void __user *)ioarg, |
| 1788 | sizeof(struct real_time_query_t))) |
| 1789 | return -EFAULT; |
| 1790 | while (retry_count < 3) { |
| 1791 | if (driver->real_time_update_busy > 0) { |
| 1792 | retry_count++; |
| 1793 | /* |
| 1794 | * The value 10000 was chosen empirically as an |
| 1795 | * optimum value in order to give the work in |
| 1796 | * diag_real_time_wq to complete processing. |
| 1797 | */ |
| 1798 | for (timer = 0; timer < 5; timer++) |
| 1799 | usleep_range(10000, 10100); |
| 1800 | } else { |
| 1801 | break; |
| 1802 | } |
| 1803 | } |
| 1804 | |
| 1805 | if (driver->real_time_update_busy > 0) |
| 1806 | return -EAGAIN; |
| 1807 | |
| 1808 | if (rt_query.proc < 0 || rt_query.proc >= DIAG_NUM_PROC) { |
| 1809 | pr_err("diag: Invalid proc %d in %s\n", rt_query.proc, |
| 1810 | __func__); |
| 1811 | return -EINVAL; |
| 1812 | } |
| 1813 | rt_query.real_time = driver->real_time_mode[rt_query.proc]; |
| 1814 | /* |
| 1815 | * For the local processor, if any of the peripherals is in buffering |
| 1816 | * mode, overwrite the value of real time with UNKNOWN_MODE |
| 1817 | */ |
| 1818 | if (rt_query.proc == DIAG_LOCAL_PROC) { |
| 1819 | for (i = 0; i < NUM_PERIPHERALS; i++) { |
| 1820 | if (!driver->feature[i].peripheral_buffering) |
| 1821 | continue; |
| 1822 | switch (driver->buffering_mode[i].mode) { |
| 1823 | case DIAG_BUFFERING_MODE_CIRCULAR: |
| 1824 | case DIAG_BUFFERING_MODE_THRESHOLD: |
| 1825 | rt_query.real_time = MODE_UNKNOWN; |
| 1826 | break; |
| 1827 | } |
| 1828 | } |
| 1829 | } |
| 1830 | |
| 1831 | if (copy_to_user((void __user *)ioarg, &rt_query, |
| 1832 | sizeof(struct real_time_query_t))) |
| 1833 | return -EFAULT; |
| 1834 | |
| 1835 | return 0; |
| 1836 | } |
| 1837 | |
| 1838 | static int diag_ioctl_set_buffering_mode(unsigned long ioarg) |
| 1839 | { |
| 1840 | struct diag_buffering_mode_t params; |
| 1841 | |
| 1842 | if (copy_from_user(¶ms, (void __user *)ioarg, sizeof(params))) |
| 1843 | return -EFAULT; |
| 1844 | |
| 1845 | if (params.peripheral >= NUM_PERIPHERALS) |
| 1846 | return -EINVAL; |
| 1847 | |
| 1848 | mutex_lock(&driver->mode_lock); |
| 1849 | driver->buffering_flag[params.peripheral] = 1; |
| 1850 | mutex_unlock(&driver->mode_lock); |
| 1851 | |
| 1852 | return diag_send_peripheral_buffering_mode(¶ms); |
| 1853 | } |
| 1854 | |
| 1855 | static int diag_ioctl_peripheral_drain_immediate(unsigned long ioarg) |
| 1856 | { |
| 1857 | uint8_t peripheral; |
| 1858 | |
| 1859 | if (copy_from_user(&peripheral, (void __user *)ioarg, sizeof(uint8_t))) |
| 1860 | return -EFAULT; |
| 1861 | |
| 1862 | if (peripheral >= NUM_PERIPHERALS) { |
| 1863 | pr_err("diag: In %s, invalid peripheral %d\n", __func__, |
| 1864 | peripheral); |
| 1865 | return -EINVAL; |
| 1866 | } |
| 1867 | |
| 1868 | if (!driver->feature[peripheral].peripheral_buffering) { |
| 1869 | pr_err("diag: In %s, peripheral %d doesn't support buffering\n", |
| 1870 | __func__, peripheral); |
| 1871 | return -EIO; |
| 1872 | } |
| 1873 | |
| 1874 | return diag_send_peripheral_drain_immediate(peripheral); |
| 1875 | } |
| 1876 | |
| 1877 | static int diag_ioctl_dci_support(unsigned long ioarg) |
| 1878 | { |
| 1879 | struct diag_dci_peripherals_t dci_support; |
| 1880 | int result = -EINVAL; |
| 1881 | |
| 1882 | if (copy_from_user(&dci_support, (void __user *)ioarg, |
| 1883 | sizeof(struct diag_dci_peripherals_t))) |
| 1884 | return -EFAULT; |
| 1885 | |
| 1886 | result = diag_dci_get_support_list(&dci_support); |
| 1887 | if (result == DIAG_DCI_NO_ERROR) |
| 1888 | if (copy_to_user((void __user *)ioarg, &dci_support, |
| 1889 | sizeof(struct diag_dci_peripherals_t))) |
| 1890 | return -EFAULT; |
| 1891 | |
| 1892 | return result; |
| 1893 | } |
| 1894 | |
| 1895 | static int diag_ioctl_hdlc_toggle(unsigned long ioarg) |
| 1896 | { |
| 1897 | uint8_t hdlc_support; |
| 1898 | struct diag_md_session_t *session_info = NULL; |
| 1899 | |
| 1900 | session_info = diag_md_session_get_pid(current->tgid); |
| 1901 | if (copy_from_user(&hdlc_support, (void __user *)ioarg, |
| 1902 | sizeof(uint8_t))) |
| 1903 | return -EFAULT; |
| 1904 | mutex_lock(&driver->hdlc_disable_mutex); |
| 1905 | if (session_info) { |
| 1906 | mutex_lock(&driver->md_session_lock); |
| 1907 | session_info->hdlc_disabled = hdlc_support; |
| 1908 | mutex_unlock(&driver->md_session_lock); |
| 1909 | } else |
| 1910 | driver->hdlc_disabled = hdlc_support; |
| 1911 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 1912 | diag_update_md_clients(HDLC_SUPPORT_TYPE); |
| 1913 | |
| 1914 | return 0; |
| 1915 | } |
| 1916 | |
| 1917 | static int diag_ioctl_register_callback(unsigned long ioarg) |
| 1918 | { |
| 1919 | int err = 0; |
| 1920 | struct diag_callback_reg_t reg; |
| 1921 | |
| 1922 | if (copy_from_user(®, (void __user *)ioarg, |
| 1923 | sizeof(struct diag_callback_reg_t))) { |
| 1924 | return -EFAULT; |
| 1925 | } |
| 1926 | |
| 1927 | if (reg.proc < 0 || reg.proc >= DIAG_NUM_PROC) { |
| 1928 | pr_err("diag: In %s, invalid proc %d for callback registration\n", |
| 1929 | __func__, reg.proc); |
| 1930 | return -EINVAL; |
| 1931 | } |
| 1932 | |
| 1933 | if (driver->md_session_mode == DIAG_MD_PERIPHERAL) |
| 1934 | return -EIO; |
| 1935 | |
| 1936 | return err; |
| 1937 | } |
| 1938 | |
| 1939 | static int diag_cmd_register_tbl(struct diag_cmd_reg_tbl_t *reg_tbl) |
| 1940 | { |
| 1941 | int i; |
| 1942 | int err = 0; |
| 1943 | uint32_t count = 0; |
| 1944 | struct diag_cmd_reg_entry_t *entries = NULL; |
| 1945 | const uint16_t entry_len = sizeof(struct diag_cmd_reg_entry_t); |
| 1946 | |
| 1947 | |
| 1948 | if (!reg_tbl) { |
| 1949 | pr_err("diag: In %s, invalid registration table\n", __func__); |
| 1950 | return -EINVAL; |
| 1951 | } |
| 1952 | |
| 1953 | count = reg_tbl->count; |
| 1954 | if ((UINT_MAX / entry_len) < count) { |
| 1955 | pr_warn("diag: In %s, possbile integer overflow.\n", __func__); |
| 1956 | return -EFAULT; |
| 1957 | } |
| 1958 | |
| 1959 | entries = kzalloc(count * entry_len, GFP_KERNEL); |
| 1960 | if (!entries) |
| 1961 | return -ENOMEM; |
| 1962 | |
| 1963 | |
| 1964 | err = copy_from_user(entries, reg_tbl->entries, count * entry_len); |
| 1965 | if (err) { |
| 1966 | pr_err("diag: In %s, error copying data from userspace, err: %d\n", |
| 1967 | __func__, err); |
| 1968 | kfree(entries); |
| 1969 | return -EFAULT; |
| 1970 | } |
| 1971 | |
| 1972 | for (i = 0; i < count; i++) { |
| 1973 | err = diag_cmd_add_reg(&entries[i], APPS_DATA, current->tgid); |
| 1974 | if (err) { |
| 1975 | pr_err("diag: In %s, unable to register command, err: %d\n", |
| 1976 | __func__, err); |
| 1977 | break; |
| 1978 | } |
| 1979 | } |
| 1980 | |
| 1981 | kfree(entries); |
| 1982 | return err; |
| 1983 | } |
| 1984 | |
| 1985 | static int diag_ioctl_cmd_reg(unsigned long ioarg) |
| 1986 | { |
| 1987 | struct diag_cmd_reg_tbl_t reg_tbl; |
| 1988 | |
| 1989 | if (copy_from_user(®_tbl, (void __user *)ioarg, |
| 1990 | sizeof(struct diag_cmd_reg_tbl_t))) { |
| 1991 | return -EFAULT; |
| 1992 | } |
| 1993 | |
| 1994 | return diag_cmd_register_tbl(®_tbl); |
| 1995 | } |
| 1996 | |
| 1997 | static int diag_ioctl_cmd_dereg(void) |
| 1998 | { |
| 1999 | diag_cmd_remove_reg_by_pid(current->tgid); |
| 2000 | return 0; |
| 2001 | } |
| 2002 | |
| 2003 | #ifdef CONFIG_COMPAT |
| 2004 | /* |
| 2005 | * @sync_obj_name: name of the synchronization object associated with this proc |
| 2006 | * @count: number of entries in the bind |
| 2007 | * @params: the actual packet registrations |
| 2008 | */ |
| 2009 | struct diag_cmd_reg_tbl_compat_t { |
| 2010 | char sync_obj_name[MAX_SYNC_OBJ_NAME_SIZE]; |
| 2011 | uint32_t count; |
| 2012 | compat_uptr_t entries; |
| 2013 | }; |
| 2014 | |
| 2015 | static int diag_ioctl_cmd_reg_compat(unsigned long ioarg) |
| 2016 | { |
| 2017 | struct diag_cmd_reg_tbl_compat_t reg_tbl_compat; |
| 2018 | struct diag_cmd_reg_tbl_t reg_tbl; |
| 2019 | |
| 2020 | if (copy_from_user(®_tbl_compat, (void __user *)ioarg, |
| 2021 | sizeof(struct diag_cmd_reg_tbl_compat_t))) { |
| 2022 | return -EFAULT; |
| 2023 | } |
| 2024 | |
| 2025 | strlcpy(reg_tbl.sync_obj_name, reg_tbl_compat.sync_obj_name, |
| 2026 | MAX_SYNC_OBJ_NAME_SIZE); |
| 2027 | reg_tbl.count = reg_tbl_compat.count; |
| 2028 | reg_tbl.entries = (struct diag_cmd_reg_entry_t *) |
| 2029 | (uintptr_t)reg_tbl_compat.entries; |
| 2030 | |
| 2031 | return diag_cmd_register_tbl(®_tbl); |
| 2032 | } |
| 2033 | |
| 2034 | long diagchar_compat_ioctl(struct file *filp, |
| 2035 | unsigned int iocmd, unsigned long ioarg) |
| 2036 | { |
| 2037 | int result = -EINVAL; |
| 2038 | int client_id = 0; |
| 2039 | uint16_t delayed_rsp_id = 0; |
| 2040 | uint16_t remote_dev; |
| 2041 | struct diag_dci_client_tbl *dci_client = NULL; |
| 2042 | struct diag_logging_mode_param_t mode_param; |
| 2043 | |
| 2044 | switch (iocmd) { |
| 2045 | case DIAG_IOCTL_COMMAND_REG: |
| 2046 | result = diag_ioctl_cmd_reg_compat(ioarg); |
| 2047 | break; |
| 2048 | case DIAG_IOCTL_COMMAND_DEREG: |
| 2049 | result = diag_ioctl_cmd_dereg(); |
| 2050 | break; |
| 2051 | case DIAG_IOCTL_GET_DELAYED_RSP_ID: |
| 2052 | delayed_rsp_id = diag_get_next_delayed_rsp_id(); |
| 2053 | if (copy_to_user((void __user *)ioarg, &delayed_rsp_id, |
| 2054 | sizeof(uint16_t))) |
| 2055 | result = -EFAULT; |
| 2056 | else |
| 2057 | result = 0; |
| 2058 | break; |
| 2059 | case DIAG_IOCTL_DCI_REG: |
| 2060 | result = diag_ioctl_dci_reg(ioarg); |
| 2061 | break; |
| 2062 | case DIAG_IOCTL_DCI_DEINIT: |
| 2063 | mutex_lock(&driver->dci_mutex); |
| 2064 | if (copy_from_user((void *)&client_id, (void __user *)ioarg, |
| 2065 | sizeof(int))) { |
| 2066 | mutex_unlock(&driver->dci_mutex); |
| 2067 | return -EFAULT; |
| 2068 | } |
| 2069 | dci_client = diag_dci_get_client_entry(client_id); |
| 2070 | if (!dci_client) { |
| 2071 | mutex_unlock(&driver->dci_mutex); |
| 2072 | return DIAG_DCI_NOT_SUPPORTED; |
| 2073 | } |
| 2074 | result = diag_dci_deinit_client(dci_client); |
| 2075 | mutex_unlock(&driver->dci_mutex); |
| 2076 | break; |
| 2077 | case DIAG_IOCTL_DCI_SUPPORT: |
| 2078 | result = diag_ioctl_dci_support(ioarg); |
| 2079 | break; |
| 2080 | case DIAG_IOCTL_DCI_HEALTH_STATS: |
| 2081 | mutex_lock(&driver->dci_mutex); |
| 2082 | result = diag_ioctl_dci_health_stats(ioarg); |
| 2083 | mutex_unlock(&driver->dci_mutex); |
| 2084 | break; |
| 2085 | case DIAG_IOCTL_DCI_LOG_STATUS: |
| 2086 | mutex_lock(&driver->dci_mutex); |
| 2087 | result = diag_ioctl_dci_log_status(ioarg); |
| 2088 | mutex_unlock(&driver->dci_mutex); |
| 2089 | break; |
| 2090 | case DIAG_IOCTL_DCI_EVENT_STATUS: |
| 2091 | mutex_lock(&driver->dci_mutex); |
| 2092 | result = diag_ioctl_dci_event_status(ioarg); |
| 2093 | mutex_unlock(&driver->dci_mutex); |
| 2094 | break; |
| 2095 | case DIAG_IOCTL_DCI_CLEAR_LOGS: |
| 2096 | mutex_lock(&driver->dci_mutex); |
| 2097 | if (copy_from_user((void *)&client_id, (void __user *)ioarg, |
| 2098 | sizeof(int))) { |
| 2099 | mutex_unlock(&driver->dci_mutex); |
| 2100 | return -EFAULT; |
| 2101 | } |
| 2102 | result = diag_dci_clear_log_mask(client_id); |
| 2103 | mutex_unlock(&driver->dci_mutex); |
| 2104 | break; |
| 2105 | case DIAG_IOCTL_DCI_CLEAR_EVENTS: |
| 2106 | mutex_lock(&driver->dci_mutex); |
| 2107 | if (copy_from_user(&client_id, (void __user *)ioarg, |
| 2108 | sizeof(int))) { |
| 2109 | mutex_unlock(&driver->dci_mutex); |
| 2110 | return -EFAULT; |
| 2111 | } |
| 2112 | result = diag_dci_clear_event_mask(client_id); |
| 2113 | mutex_unlock(&driver->dci_mutex); |
| 2114 | break; |
| 2115 | case DIAG_IOCTL_LSM_DEINIT: |
| 2116 | result = diag_ioctl_lsm_deinit(); |
| 2117 | break; |
| 2118 | case DIAG_IOCTL_SWITCH_LOGGING: |
| 2119 | if (copy_from_user((void *)&mode_param, (void __user *)ioarg, |
| 2120 | sizeof(mode_param))) |
| 2121 | return -EFAULT; |
| 2122 | mutex_lock(&driver->diagchar_mutex); |
| 2123 | result = diag_switch_logging(&mode_param); |
| 2124 | mutex_unlock(&driver->diagchar_mutex); |
| 2125 | break; |
| 2126 | case DIAG_IOCTL_REMOTE_DEV: |
| 2127 | remote_dev = diag_get_remote_device_mask(); |
| 2128 | if (copy_to_user((void __user *)ioarg, &remote_dev, |
| 2129 | sizeof(uint16_t))) |
| 2130 | result = -EFAULT; |
| 2131 | else |
| 2132 | result = 1; |
| 2133 | break; |
| 2134 | case DIAG_IOCTL_VOTE_REAL_TIME: |
| 2135 | mutex_lock(&driver->dci_mutex); |
| 2136 | result = diag_ioctl_vote_real_time(ioarg); |
| 2137 | mutex_unlock(&driver->dci_mutex); |
| 2138 | break; |
| 2139 | case DIAG_IOCTL_GET_REAL_TIME: |
| 2140 | result = diag_ioctl_get_real_time(ioarg); |
| 2141 | break; |
| 2142 | case DIAG_IOCTL_PERIPHERAL_BUF_CONFIG: |
| 2143 | result = diag_ioctl_set_buffering_mode(ioarg); |
| 2144 | break; |
| 2145 | case DIAG_IOCTL_PERIPHERAL_BUF_DRAIN: |
| 2146 | result = diag_ioctl_peripheral_drain_immediate(ioarg); |
| 2147 | break; |
| 2148 | case DIAG_IOCTL_REGISTER_CALLBACK: |
| 2149 | result = diag_ioctl_register_callback(ioarg); |
| 2150 | break; |
| 2151 | case DIAG_IOCTL_HDLC_TOGGLE: |
| 2152 | result = diag_ioctl_hdlc_toggle(ioarg); |
| 2153 | break; |
| 2154 | } |
| 2155 | return result; |
| 2156 | } |
| 2157 | #endif |
| 2158 | |
| 2159 | long diagchar_ioctl(struct file *filp, |
| 2160 | unsigned int iocmd, unsigned long ioarg) |
| 2161 | { |
| 2162 | int result = -EINVAL; |
| 2163 | int client_id = 0; |
| 2164 | uint16_t delayed_rsp_id; |
| 2165 | uint16_t remote_dev; |
| 2166 | struct diag_dci_client_tbl *dci_client = NULL; |
| 2167 | struct diag_logging_mode_param_t mode_param; |
| 2168 | |
| 2169 | switch (iocmd) { |
| 2170 | case DIAG_IOCTL_COMMAND_REG: |
| 2171 | result = diag_ioctl_cmd_reg(ioarg); |
| 2172 | break; |
| 2173 | case DIAG_IOCTL_COMMAND_DEREG: |
| 2174 | result = diag_ioctl_cmd_dereg(); |
| 2175 | break; |
| 2176 | case DIAG_IOCTL_GET_DELAYED_RSP_ID: |
| 2177 | delayed_rsp_id = diag_get_next_delayed_rsp_id(); |
| 2178 | if (copy_to_user((void __user *)ioarg, &delayed_rsp_id, |
| 2179 | sizeof(uint16_t))) |
| 2180 | result = -EFAULT; |
| 2181 | else |
| 2182 | result = 0; |
| 2183 | break; |
| 2184 | case DIAG_IOCTL_DCI_REG: |
| 2185 | result = diag_ioctl_dci_reg(ioarg); |
| 2186 | break; |
| 2187 | case DIAG_IOCTL_DCI_DEINIT: |
| 2188 | mutex_lock(&driver->dci_mutex); |
| 2189 | if (copy_from_user((void *)&client_id, (void __user *)ioarg, |
| 2190 | sizeof(int))) { |
| 2191 | mutex_unlock(&driver->dci_mutex); |
| 2192 | return -EFAULT; |
| 2193 | } |
| 2194 | dci_client = diag_dci_get_client_entry(client_id); |
| 2195 | if (!dci_client) { |
| 2196 | mutex_unlock(&driver->dci_mutex); |
| 2197 | return DIAG_DCI_NOT_SUPPORTED; |
| 2198 | } |
| 2199 | result = diag_dci_deinit_client(dci_client); |
| 2200 | mutex_unlock(&driver->dci_mutex); |
| 2201 | break; |
| 2202 | case DIAG_IOCTL_DCI_SUPPORT: |
| 2203 | result = diag_ioctl_dci_support(ioarg); |
| 2204 | break; |
| 2205 | case DIAG_IOCTL_DCI_HEALTH_STATS: |
| 2206 | mutex_lock(&driver->dci_mutex); |
| 2207 | result = diag_ioctl_dci_health_stats(ioarg); |
| 2208 | mutex_unlock(&driver->dci_mutex); |
| 2209 | break; |
| 2210 | case DIAG_IOCTL_DCI_LOG_STATUS: |
| 2211 | mutex_lock(&driver->dci_mutex); |
| 2212 | result = diag_ioctl_dci_log_status(ioarg); |
| 2213 | mutex_unlock(&driver->dci_mutex); |
| 2214 | break; |
| 2215 | case DIAG_IOCTL_DCI_EVENT_STATUS: |
| 2216 | result = diag_ioctl_dci_event_status(ioarg); |
| 2217 | break; |
| 2218 | case DIAG_IOCTL_DCI_CLEAR_LOGS: |
| 2219 | mutex_lock(&driver->dci_mutex); |
| 2220 | if (copy_from_user((void *)&client_id, (void __user *)ioarg, |
| 2221 | sizeof(int))) { |
| 2222 | mutex_unlock(&driver->dci_mutex); |
| 2223 | return -EFAULT; |
| 2224 | } |
| 2225 | result = diag_dci_clear_log_mask(client_id); |
| 2226 | mutex_unlock(&driver->dci_mutex); |
| 2227 | break; |
| 2228 | case DIAG_IOCTL_DCI_CLEAR_EVENTS: |
| 2229 | mutex_lock(&driver->dci_mutex); |
| 2230 | if (copy_from_user(&client_id, (void __user *)ioarg, |
| 2231 | sizeof(int))) { |
| 2232 | mutex_unlock(&driver->dci_mutex); |
| 2233 | return -EFAULT; |
| 2234 | } |
| 2235 | result = diag_dci_clear_event_mask(client_id); |
| 2236 | mutex_unlock(&driver->dci_mutex); |
| 2237 | break; |
| 2238 | case DIAG_IOCTL_LSM_DEINIT: |
| 2239 | result = diag_ioctl_lsm_deinit(); |
| 2240 | break; |
| 2241 | case DIAG_IOCTL_SWITCH_LOGGING: |
| 2242 | if (copy_from_user((void *)&mode_param, (void __user *)ioarg, |
| 2243 | sizeof(mode_param))) |
| 2244 | return -EFAULT; |
| 2245 | mutex_lock(&driver->diagchar_mutex); |
| 2246 | result = diag_switch_logging(&mode_param); |
| 2247 | mutex_unlock(&driver->diagchar_mutex); |
| 2248 | break; |
| 2249 | case DIAG_IOCTL_REMOTE_DEV: |
| 2250 | remote_dev = diag_get_remote_device_mask(); |
| 2251 | if (copy_to_user((void __user *)ioarg, &remote_dev, |
| 2252 | sizeof(uint16_t))) |
| 2253 | result = -EFAULT; |
| 2254 | else |
| 2255 | result = 1; |
| 2256 | break; |
| 2257 | case DIAG_IOCTL_VOTE_REAL_TIME: |
| 2258 | mutex_lock(&driver->dci_mutex); |
| 2259 | result = diag_ioctl_vote_real_time(ioarg); |
| 2260 | mutex_unlock(&driver->dci_mutex); |
| 2261 | break; |
| 2262 | case DIAG_IOCTL_GET_REAL_TIME: |
| 2263 | result = diag_ioctl_get_real_time(ioarg); |
| 2264 | break; |
| 2265 | case DIAG_IOCTL_PERIPHERAL_BUF_CONFIG: |
| 2266 | result = diag_ioctl_set_buffering_mode(ioarg); |
| 2267 | break; |
| 2268 | case DIAG_IOCTL_PERIPHERAL_BUF_DRAIN: |
| 2269 | result = diag_ioctl_peripheral_drain_immediate(ioarg); |
| 2270 | break; |
| 2271 | case DIAG_IOCTL_REGISTER_CALLBACK: |
| 2272 | result = diag_ioctl_register_callback(ioarg); |
| 2273 | break; |
| 2274 | case DIAG_IOCTL_HDLC_TOGGLE: |
| 2275 | result = diag_ioctl_hdlc_toggle(ioarg); |
| 2276 | break; |
| 2277 | } |
| 2278 | return result; |
| 2279 | } |
| 2280 | |
| 2281 | static int diag_process_apps_data_hdlc(unsigned char *buf, int len, |
| 2282 | int pkt_type) |
| 2283 | { |
| 2284 | int err = 0; |
| 2285 | int ret = PKT_DROP; |
| 2286 | struct diag_apps_data_t *data = &hdlc_data; |
| 2287 | struct diag_send_desc_type send = { NULL, NULL, DIAG_STATE_START, 0 }; |
| 2288 | struct diag_hdlc_dest_type enc = { NULL, NULL, 0 }; |
| 2289 | /* |
| 2290 | * The maximum encoded size of the buffer can be atmost twice the length |
| 2291 | * of the packet. Add three bytes foe footer - 16 bit CRC (2 bytes) + |
| 2292 | * delimiter (1 byte). |
| 2293 | */ |
| 2294 | const uint32_t max_encoded_size = ((2 * len) + 3); |
| 2295 | |
| 2296 | if (!buf || len <= 0) { |
| 2297 | pr_err("diag: In %s, invalid buf: %pK len: %d\n", |
| 2298 | __func__, buf, len); |
| 2299 | return -EIO; |
| 2300 | } |
| 2301 | |
| 2302 | if (max_encoded_size > DIAG_MAX_HDLC_BUF_SIZE) { |
| 2303 | pr_err_ratelimited("diag: In %s, encoded data is larger %d than the buffer size %d\n", |
| 2304 | __func__, max_encoded_size, DIAG_MAX_HDLC_BUF_SIZE); |
| 2305 | return -EBADMSG; |
| 2306 | } |
| 2307 | |
| 2308 | send.state = DIAG_STATE_START; |
| 2309 | send.pkt = buf; |
| 2310 | send.last = (void *)(buf + len - 1); |
| 2311 | send.terminate = 1; |
| 2312 | |
| 2313 | if (!data->buf) |
| 2314 | data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + |
| 2315 | APF_DIAG_PADDING, |
| 2316 | POOL_TYPE_HDLC); |
| 2317 | if (!data->buf) { |
| 2318 | ret = PKT_DROP; |
| 2319 | goto fail_ret; |
| 2320 | } |
| 2321 | |
| 2322 | if ((DIAG_MAX_HDLC_BUF_SIZE - data->len) <= max_encoded_size) { |
| 2323 | err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, |
| 2324 | data->ctxt); |
| 2325 | if (err) { |
| 2326 | ret = -EIO; |
| 2327 | goto fail_free_buf; |
| 2328 | } |
| 2329 | data->buf = NULL; |
| 2330 | data->len = 0; |
| 2331 | data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + |
| 2332 | APF_DIAG_PADDING, |
| 2333 | POOL_TYPE_HDLC); |
| 2334 | if (!data->buf) { |
| 2335 | ret = PKT_DROP; |
| 2336 | goto fail_ret; |
| 2337 | } |
| 2338 | } |
| 2339 | |
| 2340 | enc.dest = data->buf + data->len; |
| 2341 | enc.dest_last = (void *)(data->buf + data->len + max_encoded_size); |
| 2342 | diag_hdlc_encode(&send, &enc); |
| 2343 | |
| 2344 | /* |
| 2345 | * This is to check if after HDLC encoding, we are still within |
| 2346 | * the limits of aggregation buffer. If not, we write out the |
| 2347 | * current buffer and start aggregation in a newly allocated |
| 2348 | * buffer. |
| 2349 | */ |
| 2350 | if ((uintptr_t)enc.dest >= (uintptr_t)(data->buf + |
| 2351 | DIAG_MAX_HDLC_BUF_SIZE)) { |
| 2352 | err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, |
| 2353 | data->ctxt); |
| 2354 | if (err) { |
| 2355 | ret = -EIO; |
| 2356 | goto fail_free_buf; |
| 2357 | } |
| 2358 | data->buf = NULL; |
| 2359 | data->len = 0; |
| 2360 | data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + |
| 2361 | APF_DIAG_PADDING, |
| 2362 | POOL_TYPE_HDLC); |
| 2363 | if (!data->buf) { |
| 2364 | ret = PKT_DROP; |
| 2365 | goto fail_ret; |
| 2366 | } |
| 2367 | |
| 2368 | enc.dest = data->buf + data->len; |
| 2369 | enc.dest_last = (void *)(data->buf + data->len + |
| 2370 | max_encoded_size); |
| 2371 | diag_hdlc_encode(&send, &enc); |
| 2372 | } |
| 2373 | |
| 2374 | data->len = (((uintptr_t)enc.dest - (uintptr_t)data->buf) < |
| 2375 | DIAG_MAX_HDLC_BUF_SIZE) ? |
| 2376 | ((uintptr_t)enc.dest - (uintptr_t)data->buf) : |
| 2377 | DIAG_MAX_HDLC_BUF_SIZE; |
| 2378 | |
| 2379 | if (pkt_type == DATA_TYPE_RESPONSE) { |
| 2380 | err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, |
| 2381 | data->ctxt); |
| 2382 | if (err) { |
| 2383 | ret = -EIO; |
| 2384 | goto fail_free_buf; |
| 2385 | } |
| 2386 | data->buf = NULL; |
| 2387 | data->len = 0; |
| 2388 | } |
| 2389 | |
| 2390 | return PKT_ALLOC; |
| 2391 | |
| 2392 | fail_free_buf: |
| 2393 | diagmem_free(driver, data->buf, POOL_TYPE_HDLC); |
| 2394 | data->buf = NULL; |
| 2395 | data->len = 0; |
| 2396 | |
| 2397 | fail_ret: |
| 2398 | return ret; |
| 2399 | } |
| 2400 | |
| 2401 | static int diag_process_apps_data_non_hdlc(unsigned char *buf, int len, |
| 2402 | int pkt_type) |
| 2403 | { |
| 2404 | int err = 0; |
| 2405 | int ret = PKT_DROP; |
| 2406 | struct diag_pkt_frame_t header; |
| 2407 | struct diag_apps_data_t *data = &non_hdlc_data; |
| 2408 | /* |
| 2409 | * The maximum packet size, when the data is non hdlc encoded is equal |
| 2410 | * to the size of the packet frame header and the length. Add 1 for the |
| 2411 | * delimiter 0x7E at the end. |
| 2412 | */ |
| 2413 | const uint32_t max_pkt_size = sizeof(header) + len + 1; |
| 2414 | |
| 2415 | if (!buf || len <= 0) { |
| 2416 | pr_err("diag: In %s, invalid buf: %pK len: %d\n", |
| 2417 | __func__, buf, len); |
| 2418 | return -EIO; |
| 2419 | } |
| 2420 | |
| 2421 | if (!data->buf) { |
| 2422 | data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + |
| 2423 | APF_DIAG_PADDING, |
| 2424 | POOL_TYPE_HDLC); |
| 2425 | if (!data->buf) { |
| 2426 | ret = PKT_DROP; |
| 2427 | goto fail_ret; |
| 2428 | } |
| 2429 | } |
| 2430 | |
| 2431 | if ((DIAG_MAX_HDLC_BUF_SIZE - data->len) <= max_pkt_size) { |
| 2432 | err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, |
| 2433 | data->ctxt); |
| 2434 | if (err) { |
| 2435 | ret = -EIO; |
| 2436 | goto fail_free_buf; |
| 2437 | } |
| 2438 | data->buf = NULL; |
| 2439 | data->len = 0; |
| 2440 | data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + |
| 2441 | APF_DIAG_PADDING, |
| 2442 | POOL_TYPE_HDLC); |
| 2443 | if (!data->buf) { |
| 2444 | ret = PKT_DROP; |
| 2445 | goto fail_ret; |
| 2446 | } |
| 2447 | } |
| 2448 | |
| 2449 | header.start = CONTROL_CHAR; |
| 2450 | header.version = 1; |
| 2451 | header.length = len; |
| 2452 | memcpy(data->buf + data->len, &header, sizeof(header)); |
| 2453 | data->len += sizeof(header); |
| 2454 | memcpy(data->buf + data->len, buf, len); |
| 2455 | data->len += len; |
| 2456 | *(uint8_t *)(data->buf + data->len) = CONTROL_CHAR; |
| 2457 | data->len += sizeof(uint8_t); |
| 2458 | if (pkt_type == DATA_TYPE_RESPONSE) { |
| 2459 | err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, |
| 2460 | data->ctxt); |
| 2461 | if (err) { |
| 2462 | ret = -EIO; |
| 2463 | goto fail_free_buf; |
| 2464 | } |
| 2465 | data->buf = NULL; |
| 2466 | data->len = 0; |
| 2467 | } |
| 2468 | |
| 2469 | return PKT_ALLOC; |
| 2470 | |
| 2471 | fail_free_buf: |
| 2472 | diagmem_free(driver, data->buf, POOL_TYPE_HDLC); |
| 2473 | data->buf = NULL; |
| 2474 | data->len = 0; |
| 2475 | |
| 2476 | fail_ret: |
| 2477 | return ret; |
| 2478 | } |
| 2479 | |
| 2480 | static int diag_user_process_dci_data(const char __user *buf, int len) |
| 2481 | { |
| 2482 | int err = 0; |
| 2483 | const int mempool = POOL_TYPE_USER; |
| 2484 | unsigned char *user_space_data = NULL; |
| 2485 | |
| 2486 | if (!buf || len <= 0 || len > diag_mempools[mempool].itemsize) { |
| 2487 | pr_err_ratelimited("diag: In %s, invalid buf %pK len: %d\n", |
| 2488 | __func__, buf, len); |
| 2489 | return -EBADMSG; |
| 2490 | } |
| 2491 | |
| 2492 | user_space_data = diagmem_alloc(driver, len, mempool); |
| 2493 | if (!user_space_data) |
| 2494 | return -ENOMEM; |
| 2495 | |
| 2496 | err = copy_from_user(user_space_data, buf, len); |
| 2497 | if (err) { |
| 2498 | pr_err_ratelimited("diag: In %s, unable to copy data from userspace, err: %d\n", |
| 2499 | __func__, err); |
| 2500 | err = DIAG_DCI_SEND_DATA_FAIL; |
| 2501 | goto fail; |
| 2502 | } |
| 2503 | |
| 2504 | err = diag_process_dci_transaction(user_space_data, len); |
| 2505 | fail: |
| 2506 | diagmem_free(driver, user_space_data, mempool); |
| 2507 | user_space_data = NULL; |
| 2508 | return err; |
| 2509 | } |
| 2510 | |
| 2511 | static int diag_user_process_dci_apps_data(const char __user *buf, int len, |
| 2512 | int pkt_type) |
| 2513 | { |
| 2514 | int err = 0; |
| 2515 | const int mempool = POOL_TYPE_COPY; |
| 2516 | unsigned char *user_space_data = NULL; |
| 2517 | |
| 2518 | if (!buf || len <= 0 || len > diag_mempools[mempool].itemsize) { |
| 2519 | pr_err_ratelimited("diag: In %s, invalid buf %pK len: %d\n", |
| 2520 | __func__, buf, len); |
| 2521 | return -EBADMSG; |
| 2522 | } |
| 2523 | |
| 2524 | pkt_type &= (DCI_PKT_TYPE | DATA_TYPE_DCI_LOG | DATA_TYPE_DCI_EVENT); |
| 2525 | if (!pkt_type) { |
| 2526 | pr_err_ratelimited("diag: In %s, invalid pkt_type: %d\n", |
| 2527 | __func__, pkt_type); |
| 2528 | return -EBADMSG; |
| 2529 | } |
| 2530 | |
| 2531 | user_space_data = diagmem_alloc(driver, len, mempool); |
| 2532 | if (!user_space_data) |
| 2533 | return -ENOMEM; |
| 2534 | |
| 2535 | err = copy_from_user(user_space_data, buf, len); |
| 2536 | if (err) { |
| 2537 | pr_alert("diag: In %s, unable to copy data from userspace, err: %d\n", |
| 2538 | __func__, err); |
| 2539 | goto fail; |
| 2540 | } |
| 2541 | |
| 2542 | diag_process_apps_dci_read_data(pkt_type, user_space_data, len); |
| 2543 | fail: |
| 2544 | diagmem_free(driver, user_space_data, mempool); |
| 2545 | user_space_data = NULL; |
| 2546 | return err; |
| 2547 | } |
| 2548 | |
| 2549 | static int diag_user_process_raw_data(const char __user *buf, int len) |
| 2550 | { |
| 2551 | int err = 0; |
| 2552 | int ret = 0; |
| 2553 | int token_offset = 0; |
| 2554 | int remote_proc = 0; |
| 2555 | const int mempool = POOL_TYPE_COPY; |
| 2556 | unsigned char *user_space_data = NULL; |
| 2557 | struct diag_md_session_t *info = NULL; |
| 2558 | |
| 2559 | if (!buf || len <= 0 || len > CALLBACK_BUF_SIZE) { |
| 2560 | pr_err_ratelimited("diag: In %s, invalid buf %pK len: %d\n", |
| 2561 | __func__, buf, len); |
| 2562 | return -EBADMSG; |
| 2563 | } |
| 2564 | |
| 2565 | user_space_data = diagmem_alloc(driver, len, mempool); |
| 2566 | if (!user_space_data) |
| 2567 | return -ENOMEM; |
| 2568 | |
| 2569 | err = copy_from_user(user_space_data, buf, len); |
| 2570 | if (err) { |
| 2571 | pr_err("diag: copy failed for user space data\n"); |
| 2572 | goto fail; |
| 2573 | } |
| 2574 | |
| 2575 | /* Check for proc_type */ |
| 2576 | remote_proc = diag_get_remote(*(int *)user_space_data); |
| 2577 | if (remote_proc) { |
| 2578 | token_offset = sizeof(int); |
| 2579 | if (len <= MIN_SIZ_ALLOW) { |
| 2580 | pr_err("diag: In %s, possible integer underflow, payload size: %d\n", |
| 2581 | __func__, len); |
| 2582 | diagmem_free(driver, user_space_data, mempool); |
| 2583 | user_space_data = NULL; |
| 2584 | return -EBADMSG; |
| 2585 | } |
| 2586 | len -= sizeof(int); |
| 2587 | } |
| 2588 | if (driver->mask_check) { |
| 2589 | if (!mask_request_validate(user_space_data + |
| 2590 | token_offset)) { |
| 2591 | pr_alert("diag: mask request Invalid\n"); |
| 2592 | diagmem_free(driver, user_space_data, mempool); |
| 2593 | user_space_data = NULL; |
| 2594 | return -EFAULT; |
| 2595 | } |
| 2596 | } |
| 2597 | if (remote_proc) { |
| 2598 | ret = diag_send_raw_data_remote(remote_proc, |
| 2599 | (void *)(user_space_data + token_offset), |
| 2600 | len, USER_SPACE_RAW_DATA); |
| 2601 | if (ret) { |
| 2602 | pr_err("diag: Error sending data to remote proc %d, err: %d\n", |
| 2603 | remote_proc, ret); |
| 2604 | } |
| 2605 | } else { |
| 2606 | wait_event_interruptible(driver->wait_q, |
| 2607 | (driver->in_busy_pktdata == 0)); |
| 2608 | info = diag_md_session_get_pid(current->tgid); |
| 2609 | ret = diag_process_apps_pkt(user_space_data, len, info); |
| 2610 | if (ret == 1) |
| 2611 | diag_send_error_rsp((void *)(user_space_data), len); |
| 2612 | } |
| 2613 | fail: |
| 2614 | diagmem_free(driver, user_space_data, mempool); |
| 2615 | user_space_data = NULL; |
| 2616 | return ret; |
| 2617 | } |
| 2618 | |
| 2619 | static int diag_user_process_userspace_data(const char __user *buf, int len) |
| 2620 | { |
| 2621 | int err = 0; |
| 2622 | int max_retries = 3; |
| 2623 | int retry_count = 0; |
| 2624 | int remote_proc = 0; |
| 2625 | int token_offset = 0; |
| 2626 | struct diag_md_session_t *session_info = NULL; |
| 2627 | uint8_t hdlc_disabled; |
| 2628 | |
| 2629 | if (!buf || len <= 0 || len > USER_SPACE_DATA) { |
| 2630 | pr_err_ratelimited("diag: In %s, invalid buf %pK len: %d\n", |
| 2631 | __func__, buf, len); |
| 2632 | return -EBADMSG; |
| 2633 | } |
| 2634 | |
| 2635 | do { |
| 2636 | if (!driver->user_space_data_busy) |
| 2637 | break; |
| 2638 | retry_count++; |
| 2639 | usleep_range(10000, 10100); |
| 2640 | } while (retry_count < max_retries); |
| 2641 | |
| 2642 | if (driver->user_space_data_busy) |
| 2643 | return -EAGAIN; |
| 2644 | |
| 2645 | err = copy_from_user(driver->user_space_data_buf, buf, len); |
| 2646 | if (err) { |
| 2647 | pr_err("diag: In %s, failed to copy data from userspace, err: %d\n", |
| 2648 | __func__, err); |
| 2649 | return -EIO; |
| 2650 | } |
| 2651 | |
| 2652 | /* Check for proc_type */ |
| 2653 | remote_proc = diag_get_remote(*(int *)driver->user_space_data_buf); |
| 2654 | if (remote_proc) { |
| 2655 | if (len <= MIN_SIZ_ALLOW) { |
| 2656 | pr_err("diag: Integer underflow in %s, payload size: %d", |
| 2657 | __func__, len); |
| 2658 | return -EBADMSG; |
| 2659 | } |
| 2660 | token_offset = sizeof(int); |
| 2661 | len -= sizeof(int); |
| 2662 | } |
| 2663 | |
| 2664 | /* Check masks for On-Device logging */ |
| 2665 | if (driver->mask_check) { |
| 2666 | if (!mask_request_validate(driver->user_space_data_buf + |
| 2667 | token_offset)) { |
| 2668 | pr_alert("diag: mask request Invalid\n"); |
| 2669 | return -EFAULT; |
| 2670 | } |
| 2671 | } |
| 2672 | |
| 2673 | /* send masks to local processor now */ |
| 2674 | if (!remote_proc) { |
| 2675 | session_info = diag_md_session_get_pid(current->tgid); |
| 2676 | if (!session_info) { |
| 2677 | pr_err("diag:In %s request came from invalid md session pid:%d", |
| 2678 | __func__, current->tgid); |
| 2679 | return -EINVAL; |
| 2680 | } |
| 2681 | if (session_info) |
| 2682 | hdlc_disabled = session_info->hdlc_disabled; |
| 2683 | else |
| 2684 | hdlc_disabled = driver->hdlc_disabled; |
| 2685 | if (!hdlc_disabled) |
| 2686 | diag_process_hdlc_pkt((void *) |
| 2687 | (driver->user_space_data_buf), |
| 2688 | len, session_info); |
| 2689 | else |
| 2690 | diag_process_non_hdlc_pkt((char *) |
| 2691 | (driver->user_space_data_buf), |
| 2692 | len, session_info); |
| 2693 | return 0; |
| 2694 | } |
| 2695 | |
| 2696 | err = diag_process_userspace_remote(remote_proc, |
| 2697 | driver->user_space_data_buf + |
| 2698 | token_offset, len); |
| 2699 | if (err) { |
| 2700 | driver->user_space_data_busy = 0; |
| 2701 | pr_err("diag: Error sending mask to remote proc %d, err: %d\n", |
| 2702 | remote_proc, err); |
| 2703 | } |
| 2704 | |
| 2705 | return err; |
| 2706 | } |
| 2707 | |
| 2708 | static int diag_user_process_apps_data(const char __user *buf, int len, |
| 2709 | int pkt_type) |
| 2710 | { |
| 2711 | int ret = 0; |
| 2712 | int stm_size = 0; |
| 2713 | const int mempool = POOL_TYPE_COPY; |
| 2714 | unsigned char *user_space_data = NULL; |
| 2715 | struct diag_md_session_t *session_info = NULL; |
| 2716 | uint8_t hdlc_disabled; |
| 2717 | |
| 2718 | if (!buf || len <= 0 || len > DIAG_MAX_RSP_SIZE) { |
| 2719 | pr_err_ratelimited("diag: In %s, invalid buf %pK len: %d\n", |
| 2720 | __func__, buf, len); |
| 2721 | return -EBADMSG; |
| 2722 | } |
| 2723 | |
| 2724 | switch (pkt_type) { |
| 2725 | case DATA_TYPE_EVENT: |
| 2726 | case DATA_TYPE_F3: |
| 2727 | case DATA_TYPE_LOG: |
| 2728 | case DATA_TYPE_RESPONSE: |
| 2729 | case DATA_TYPE_DELAYED_RESPONSE: |
| 2730 | break; |
| 2731 | default: |
| 2732 | pr_err_ratelimited("diag: In %s, invalid pkt_type: %d\n", |
| 2733 | __func__, pkt_type); |
| 2734 | return -EBADMSG; |
| 2735 | } |
| 2736 | |
| 2737 | user_space_data = diagmem_alloc(driver, len, mempool); |
| 2738 | if (!user_space_data) { |
| 2739 | diag_record_stats(pkt_type, PKT_DROP); |
| 2740 | return -ENOMEM; |
| 2741 | } |
| 2742 | |
| 2743 | ret = copy_from_user(user_space_data, buf, len); |
| 2744 | if (ret) { |
| 2745 | pr_alert("diag: In %s, unable to copy data from userspace, err: %d\n", |
| 2746 | __func__, ret); |
| 2747 | diagmem_free(driver, user_space_data, mempool); |
| 2748 | user_space_data = NULL; |
| 2749 | diag_record_stats(pkt_type, PKT_DROP); |
| 2750 | return -EBADMSG; |
| 2751 | } |
| 2752 | |
| 2753 | if (driver->stm_state[APPS_DATA] && |
| 2754 | (pkt_type >= DATA_TYPE_EVENT) && (pkt_type <= DATA_TYPE_LOG)) { |
| 2755 | stm_size = stm_log_inv_ts(OST_ENTITY_DIAG, 0, user_space_data, |
| 2756 | len); |
| 2757 | if (stm_size == 0) { |
| 2758 | pr_debug("diag: In %s, stm_log_inv_ts returned size of 0\n", |
| 2759 | __func__); |
| 2760 | } |
| 2761 | diagmem_free(driver, user_space_data, mempool); |
| 2762 | user_space_data = NULL; |
| 2763 | |
| 2764 | return 0; |
| 2765 | } |
| 2766 | |
| 2767 | mutex_lock(&apps_data_mutex); |
| 2768 | mutex_lock(&driver->hdlc_disable_mutex); |
| 2769 | session_info = diag_md_session_get_peripheral(APPS_DATA); |
| 2770 | if (session_info) |
| 2771 | hdlc_disabled = session_info->hdlc_disabled; |
| 2772 | else |
| 2773 | hdlc_disabled = driver->hdlc_disabled; |
| 2774 | if (hdlc_disabled) |
| 2775 | ret = diag_process_apps_data_non_hdlc(user_space_data, len, |
| 2776 | pkt_type); |
| 2777 | else |
| 2778 | ret = diag_process_apps_data_hdlc(user_space_data, len, |
| 2779 | pkt_type); |
| 2780 | mutex_unlock(&driver->hdlc_disable_mutex); |
| 2781 | mutex_unlock(&apps_data_mutex); |
| 2782 | |
| 2783 | diagmem_free(driver, user_space_data, mempool); |
| 2784 | user_space_data = NULL; |
| 2785 | |
| 2786 | check_drain_timer(); |
| 2787 | |
| 2788 | if (ret == PKT_DROP) |
| 2789 | diag_record_stats(pkt_type, PKT_DROP); |
| 2790 | else if (ret == PKT_ALLOC) |
| 2791 | diag_record_stats(pkt_type, PKT_ALLOC); |
| 2792 | else |
| 2793 | return ret; |
| 2794 | |
| 2795 | return 0; |
| 2796 | } |
| 2797 | |
| 2798 | static ssize_t diagchar_read(struct file *file, char __user *buf, size_t count, |
| 2799 | loff_t *ppos) |
| 2800 | { |
| 2801 | struct diag_dci_client_tbl *entry; |
| 2802 | struct list_head *start, *temp; |
| 2803 | int index = -1, i = 0, ret = 0; |
| 2804 | int data_type; |
| 2805 | int copy_dci_data = 0; |
| 2806 | int exit_stat = 0; |
| 2807 | int write_len = 0; |
| 2808 | struct diag_md_session_t *session_info = NULL; |
| 2809 | |
| 2810 | for (i = 0; i < driver->num_clients; i++) |
| 2811 | if (driver->client_map[i].pid == current->tgid) |
| 2812 | index = i; |
| 2813 | |
| 2814 | if (index == -1) { |
| 2815 | pr_err("diag: Client PID not found in table"); |
| 2816 | return -EINVAL; |
| 2817 | } |
| 2818 | if (!buf) { |
| 2819 | pr_err("diag: bad address from user side\n"); |
| 2820 | return -EFAULT; |
| 2821 | } |
| 2822 | wait_event_interruptible(driver->wait_q, driver->data_ready[index]); |
| 2823 | |
| 2824 | mutex_lock(&driver->diagchar_mutex); |
| 2825 | |
| 2826 | if ((driver->data_ready[index] & USER_SPACE_DATA_TYPE) && |
| 2827 | (driver->logging_mode == DIAG_MEMORY_DEVICE_MODE || |
| 2828 | driver->logging_mode == DIAG_MULTI_MODE)) { |
| 2829 | pr_debug("diag: process woken up\n"); |
| 2830 | /*Copy the type of data being passed*/ |
| 2831 | data_type = driver->data_ready[index] & USER_SPACE_DATA_TYPE; |
| 2832 | driver->data_ready[index] ^= USER_SPACE_DATA_TYPE; |
| 2833 | COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(int)); |
| 2834 | if (ret == -EFAULT) |
| 2835 | goto exit; |
| 2836 | /* place holder for number of data field */ |
| 2837 | ret += sizeof(int); |
| 2838 | session_info = diag_md_session_get_pid(current->tgid); |
| 2839 | exit_stat = diag_md_copy_to_user(buf, &ret, count, |
| 2840 | session_info); |
| 2841 | goto exit; |
| 2842 | } else if (driver->data_ready[index] & USER_SPACE_DATA_TYPE) { |
| 2843 | /* In case, the thread wakes up and the logging mode is not |
| 2844 | * memory device any more, the condition needs to be cleared. |
| 2845 | */ |
| 2846 | driver->data_ready[index] ^= USER_SPACE_DATA_TYPE; |
| 2847 | } |
| 2848 | |
| 2849 | if (driver->data_ready[index] & HDLC_SUPPORT_TYPE) { |
| 2850 | data_type = driver->data_ready[index] & HDLC_SUPPORT_TYPE; |
| 2851 | driver->data_ready[index] ^= HDLC_SUPPORT_TYPE; |
| 2852 | COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(int)); |
| 2853 | if (ret == -EFAULT) |
| 2854 | goto exit; |
| 2855 | |
| 2856 | session_info = diag_md_session_get_pid(current->tgid); |
| 2857 | if (session_info) { |
| 2858 | COPY_USER_SPACE_OR_ERR(buf+4, |
| 2859 | session_info->hdlc_disabled, |
| 2860 | sizeof(uint8_t)); |
| 2861 | if (ret == -EFAULT) |
| 2862 | goto exit; |
| 2863 | } |
| 2864 | goto exit; |
| 2865 | } |
| 2866 | |
| 2867 | if (driver->data_ready[index] & DEINIT_TYPE) { |
| 2868 | /*Copy the type of data being passed*/ |
| 2869 | data_type = driver->data_ready[index] & DEINIT_TYPE; |
| 2870 | COPY_USER_SPACE_OR_ERR(buf, data_type, 4); |
| 2871 | if (ret == -EFAULT) |
| 2872 | goto exit; |
| 2873 | driver->data_ready[index] ^= DEINIT_TYPE; |
| 2874 | mutex_unlock(&driver->diagchar_mutex); |
| 2875 | diag_remove_client_entry(file); |
| 2876 | return ret; |
| 2877 | } |
| 2878 | |
| 2879 | if (driver->data_ready[index] & MSG_MASKS_TYPE) { |
| 2880 | /*Copy the type of data being passed*/ |
| 2881 | data_type = driver->data_ready[index] & MSG_MASKS_TYPE; |
| 2882 | session_info = diag_md_session_get_peripheral(APPS_DATA); |
| 2883 | COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(int)); |
| 2884 | if (ret == -EFAULT) |
| 2885 | goto exit; |
| 2886 | write_len = diag_copy_to_user_msg_mask(buf + ret, count, |
| 2887 | session_info); |
| 2888 | if (write_len > 0) |
| 2889 | ret += write_len; |
| 2890 | driver->data_ready[index] ^= MSG_MASKS_TYPE; |
| 2891 | goto exit; |
| 2892 | } |
| 2893 | |
| 2894 | if (driver->data_ready[index] & EVENT_MASKS_TYPE) { |
| 2895 | /*Copy the type of data being passed*/ |
| 2896 | data_type = driver->data_ready[index] & EVENT_MASKS_TYPE; |
| 2897 | session_info = diag_md_session_get_peripheral(APPS_DATA); |
| 2898 | COPY_USER_SPACE_OR_ERR(buf, data_type, 4); |
| 2899 | if (ret == -EFAULT) |
| 2900 | goto exit; |
| 2901 | |
| 2902 | if (session_info && session_info->event_mask && |
| 2903 | session_info->event_mask->ptr) { |
| 2904 | COPY_USER_SPACE_OR_ERR(buf + sizeof(int), |
| 2905 | *(session_info->event_mask->ptr), |
| 2906 | session_info->event_mask->mask_len); |
| 2907 | if (ret == -EFAULT) |
| 2908 | goto exit; |
| 2909 | } else { |
| 2910 | COPY_USER_SPACE_OR_ERR(buf + sizeof(int), |
| 2911 | *(event_mask.ptr), |
| 2912 | event_mask.mask_len); |
| 2913 | if (ret == -EFAULT) |
| 2914 | goto exit; |
| 2915 | } |
| 2916 | driver->data_ready[index] ^= EVENT_MASKS_TYPE; |
| 2917 | goto exit; |
| 2918 | } |
| 2919 | |
| 2920 | if (driver->data_ready[index] & LOG_MASKS_TYPE) { |
| 2921 | /*Copy the type of data being passed*/ |
| 2922 | data_type = driver->data_ready[index] & LOG_MASKS_TYPE; |
| 2923 | session_info = diag_md_session_get_peripheral(APPS_DATA); |
| 2924 | COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(int)); |
| 2925 | if (ret == -EFAULT) |
| 2926 | goto exit; |
| 2927 | |
| 2928 | write_len = diag_copy_to_user_log_mask(buf + ret, count, |
| 2929 | session_info); |
| 2930 | if (write_len > 0) |
| 2931 | ret += write_len; |
| 2932 | driver->data_ready[index] ^= LOG_MASKS_TYPE; |
| 2933 | goto exit; |
| 2934 | } |
| 2935 | |
| 2936 | if (driver->data_ready[index] & PKT_TYPE) { |
| 2937 | /*Copy the type of data being passed*/ |
| 2938 | data_type = driver->data_ready[index] & PKT_TYPE; |
| 2939 | COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(data_type)); |
| 2940 | if (ret == -EFAULT) |
| 2941 | goto exit; |
| 2942 | |
| 2943 | COPY_USER_SPACE_OR_ERR(buf + sizeof(data_type), |
| 2944 | *(driver->apps_req_buf), |
| 2945 | driver->apps_req_buf_len); |
| 2946 | if (ret == -EFAULT) |
| 2947 | goto exit; |
| 2948 | driver->data_ready[index] ^= PKT_TYPE; |
| 2949 | driver->in_busy_pktdata = 0; |
| 2950 | goto exit; |
| 2951 | } |
| 2952 | |
| 2953 | if (driver->data_ready[index] & DCI_PKT_TYPE) { |
| 2954 | /* Copy the type of data being passed */ |
| 2955 | data_type = driver->data_ready[index] & DCI_PKT_TYPE; |
| 2956 | COPY_USER_SPACE_OR_ERR(buf, data_type, 4); |
| 2957 | if (ret == -EFAULT) |
| 2958 | goto exit; |
| 2959 | |
| 2960 | COPY_USER_SPACE_OR_ERR(buf+4, *(driver->dci_pkt_buf), |
| 2961 | driver->dci_pkt_length); |
| 2962 | if (ret == -EFAULT) |
| 2963 | goto exit; |
| 2964 | |
| 2965 | driver->data_ready[index] ^= DCI_PKT_TYPE; |
| 2966 | driver->in_busy_dcipktdata = 0; |
| 2967 | goto exit; |
| 2968 | } |
| 2969 | |
| 2970 | if (driver->data_ready[index] & DCI_EVENT_MASKS_TYPE) { |
| 2971 | /*Copy the type of data being passed*/ |
| 2972 | data_type = driver->data_ready[index] & DCI_EVENT_MASKS_TYPE; |
| 2973 | COPY_USER_SPACE_OR_ERR(buf, data_type, 4); |
| 2974 | if (ret == -EFAULT) |
| 2975 | goto exit; |
| 2976 | |
| 2977 | COPY_USER_SPACE_OR_ERR(buf+4, driver->num_dci_client, 4); |
| 2978 | if (ret == -EFAULT) |
| 2979 | goto exit; |
| 2980 | |
| 2981 | COPY_USER_SPACE_OR_ERR(buf + 8, (dci_ops_tbl[DCI_LOCAL_PROC]. |
| 2982 | event_mask_composite), DCI_EVENT_MASK_SIZE); |
| 2983 | if (ret == -EFAULT) |
| 2984 | goto exit; |
| 2985 | |
| 2986 | driver->data_ready[index] ^= DCI_EVENT_MASKS_TYPE; |
| 2987 | goto exit; |
| 2988 | } |
| 2989 | |
| 2990 | if (driver->data_ready[index] & DCI_LOG_MASKS_TYPE) { |
| 2991 | /*Copy the type of data being passed*/ |
| 2992 | data_type = driver->data_ready[index] & DCI_LOG_MASKS_TYPE; |
| 2993 | COPY_USER_SPACE_OR_ERR(buf, data_type, 4); |
| 2994 | if (ret == -EFAULT) |
| 2995 | goto exit; |
| 2996 | |
| 2997 | COPY_USER_SPACE_OR_ERR(buf+4, driver->num_dci_client, 4); |
| 2998 | if (ret == -EFAULT) |
| 2999 | goto exit; |
| 3000 | |
| 3001 | COPY_USER_SPACE_OR_ERR(buf+8, (dci_ops_tbl[DCI_LOCAL_PROC]. |
| 3002 | log_mask_composite), DCI_LOG_MASK_SIZE); |
| 3003 | if (ret == -EFAULT) |
| 3004 | goto exit; |
| 3005 | driver->data_ready[index] ^= DCI_LOG_MASKS_TYPE; |
| 3006 | goto exit; |
| 3007 | } |
| 3008 | |
| 3009 | exit: |
| 3010 | mutex_unlock(&driver->diagchar_mutex); |
| 3011 | if (driver->data_ready[index] & DCI_DATA_TYPE) { |
| 3012 | mutex_lock(&driver->dci_mutex); |
| 3013 | /* Copy the type of data being passed */ |
| 3014 | data_type = driver->data_ready[index] & DCI_DATA_TYPE; |
| 3015 | list_for_each_safe(start, temp, &driver->dci_client_list) { |
| 3016 | entry = list_entry(start, struct diag_dci_client_tbl, |
| 3017 | track); |
| 3018 | if (entry->client->tgid != current->tgid) |
| 3019 | continue; |
| 3020 | if (!entry->in_service) |
| 3021 | continue; |
| 3022 | if (copy_to_user(buf + ret, &data_type, sizeof(int))) { |
| 3023 | mutex_unlock(&driver->dci_mutex); |
| 3024 | goto end; |
| 3025 | } |
| 3026 | ret += sizeof(int); |
| 3027 | if (copy_to_user(buf + ret, &entry->client_info.token, |
| 3028 | sizeof(int))) { |
| 3029 | mutex_unlock(&driver->dci_mutex); |
| 3030 | goto end; |
| 3031 | } |
| 3032 | ret += sizeof(int); |
| 3033 | copy_dci_data = 1; |
| 3034 | exit_stat = diag_copy_dci(buf, count, entry, &ret); |
| 3035 | mutex_lock(&driver->diagchar_mutex); |
| 3036 | driver->data_ready[index] ^= DCI_DATA_TYPE; |
| 3037 | mutex_unlock(&driver->diagchar_mutex); |
| 3038 | if (exit_stat == 1) { |
| 3039 | mutex_unlock(&driver->dci_mutex); |
| 3040 | goto end; |
| 3041 | } |
| 3042 | } |
| 3043 | mutex_unlock(&driver->dci_mutex); |
| 3044 | goto end; |
| 3045 | } |
| 3046 | end: |
| 3047 | /* |
| 3048 | * Flush any read that is currently pending on DCI data and |
| 3049 | * command channnels. This will ensure that the next read is not |
| 3050 | * missed. |
| 3051 | */ |
| 3052 | if (copy_dci_data) { |
| 3053 | diag_ws_on_copy_complete(DIAG_WS_DCI); |
| 3054 | flush_workqueue(driver->diag_dci_wq); |
| 3055 | } |
| 3056 | return ret; |
| 3057 | } |
| 3058 | |
| 3059 | static ssize_t diagchar_write(struct file *file, const char __user *buf, |
| 3060 | size_t count, loff_t *ppos) |
| 3061 | { |
| 3062 | int err = 0; |
| 3063 | int pkt_type = 0; |
| 3064 | int payload_len = 0; |
| 3065 | const char __user *payload_buf = NULL; |
| 3066 | |
| 3067 | /* |
| 3068 | * The data coming from the user sapce should at least have the |
| 3069 | * packet type heeader. |
| 3070 | */ |
| 3071 | if (count < sizeof(int)) { |
| 3072 | pr_err("diag: In %s, client is sending short data, len: %d\n", |
| 3073 | __func__, (int)count); |
| 3074 | return -EBADMSG; |
| 3075 | } |
| 3076 | |
| 3077 | err = copy_from_user((&pkt_type), buf, sizeof(int)); |
| 3078 | if (err) { |
| 3079 | pr_err_ratelimited("diag: In %s, unable to copy pkt_type from userspace, err: %d\n", |
| 3080 | __func__, err); |
| 3081 | return -EIO; |
| 3082 | } |
| 3083 | |
| 3084 | if (driver->logging_mode == DIAG_USB_MODE && !driver->usb_connected) { |
| 3085 | if (!((pkt_type == DCI_DATA_TYPE) || |
| 3086 | (pkt_type == DCI_PKT_TYPE) || |
| 3087 | (pkt_type & DATA_TYPE_DCI_LOG) || |
| 3088 | (pkt_type & DATA_TYPE_DCI_EVENT))) { |
| 3089 | pr_debug("diag: In %s, Dropping non DCI packet type\n", |
| 3090 | __func__); |
| 3091 | return -EIO; |
| 3092 | } |
| 3093 | } |
| 3094 | |
| 3095 | payload_buf = buf + sizeof(int); |
| 3096 | payload_len = count - sizeof(int); |
| 3097 | |
| 3098 | if (pkt_type == DCI_PKT_TYPE) |
| 3099 | return diag_user_process_dci_apps_data(payload_buf, |
| 3100 | payload_len, |
| 3101 | pkt_type); |
| 3102 | else if (pkt_type == DCI_DATA_TYPE) |
| 3103 | return diag_user_process_dci_data(payload_buf, payload_len); |
| 3104 | else if (pkt_type == USER_SPACE_RAW_DATA_TYPE) |
| 3105 | return diag_user_process_raw_data(payload_buf, |
| 3106 | payload_len); |
| 3107 | else if (pkt_type == USER_SPACE_DATA_TYPE) |
| 3108 | return diag_user_process_userspace_data(payload_buf, |
| 3109 | payload_len); |
| 3110 | if (pkt_type & (DATA_TYPE_DCI_LOG | DATA_TYPE_DCI_EVENT)) { |
| 3111 | err = diag_user_process_dci_apps_data(payload_buf, payload_len, |
| 3112 | pkt_type); |
| 3113 | if (pkt_type & DATA_TYPE_DCI_LOG) |
| 3114 | pkt_type ^= DATA_TYPE_DCI_LOG; |
| 3115 | if (pkt_type & DATA_TYPE_DCI_EVENT) |
| 3116 | pkt_type ^= DATA_TYPE_DCI_EVENT; |
| 3117 | /* |
| 3118 | * Check if the log or event is selected even on the regular |
| 3119 | * stream. If USB is not connected and we are not in memory |
| 3120 | * device mode, we should not process these logs/events. |
| 3121 | */ |
| 3122 | if (pkt_type && driver->logging_mode == DIAG_USB_MODE && |
| 3123 | !driver->usb_connected) |
| 3124 | return err; |
| 3125 | } |
| 3126 | |
| 3127 | switch (pkt_type) { |
| 3128 | case DATA_TYPE_EVENT: |
| 3129 | case DATA_TYPE_F3: |
| 3130 | case DATA_TYPE_LOG: |
| 3131 | case DATA_TYPE_DELAYED_RESPONSE: |
| 3132 | case DATA_TYPE_RESPONSE: |
| 3133 | return diag_user_process_apps_data(payload_buf, payload_len, |
| 3134 | pkt_type); |
| 3135 | default: |
| 3136 | pr_err_ratelimited("diag: In %s, invalid pkt_type: %d\n", |
| 3137 | __func__, pkt_type); |
| 3138 | return -EINVAL; |
| 3139 | } |
| 3140 | |
| 3141 | return err; |
| 3142 | } |
| 3143 | |
| 3144 | void diag_ws_init(void) |
| 3145 | { |
| 3146 | driver->dci_ws.ref_count = 0; |
| 3147 | driver->dci_ws.copy_count = 0; |
| 3148 | spin_lock_init(&driver->dci_ws.lock); |
| 3149 | |
| 3150 | driver->md_ws.ref_count = 0; |
| 3151 | driver->md_ws.copy_count = 0; |
| 3152 | spin_lock_init(&driver->md_ws.lock); |
| 3153 | } |
| 3154 | |
| 3155 | static void diag_stats_init(void) |
| 3156 | { |
| 3157 | if (!driver) |
| 3158 | return; |
| 3159 | |
| 3160 | driver->msg_stats.alloc_count = 0; |
| 3161 | driver->msg_stats.drop_count = 0; |
| 3162 | |
| 3163 | driver->log_stats.alloc_count = 0; |
| 3164 | driver->log_stats.drop_count = 0; |
| 3165 | |
| 3166 | driver->event_stats.alloc_count = 0; |
| 3167 | driver->event_stats.drop_count = 0; |
| 3168 | } |
| 3169 | |
| 3170 | void diag_ws_on_notify(void) |
| 3171 | { |
| 3172 | /* |
| 3173 | * Do not deal with reference count here as there can be spurious |
| 3174 | * interrupts. |
| 3175 | */ |
| 3176 | pm_stay_awake(driver->diag_dev); |
| 3177 | } |
| 3178 | |
| 3179 | void diag_ws_on_read(int type, int pkt_len) |
| 3180 | { |
| 3181 | unsigned long flags; |
| 3182 | struct diag_ws_ref_t *ws_ref = NULL; |
| 3183 | |
| 3184 | switch (type) { |
| 3185 | case DIAG_WS_DCI: |
| 3186 | ws_ref = &driver->dci_ws; |
| 3187 | break; |
| 3188 | case DIAG_WS_MUX: |
| 3189 | ws_ref = &driver->md_ws; |
| 3190 | break; |
| 3191 | default: |
| 3192 | pr_err_ratelimited("diag: In %s, invalid type: %d\n", |
| 3193 | __func__, type); |
| 3194 | return; |
| 3195 | } |
| 3196 | |
| 3197 | spin_lock_irqsave(&ws_ref->lock, flags); |
| 3198 | if (pkt_len > 0) { |
| 3199 | ws_ref->ref_count++; |
| 3200 | } else { |
| 3201 | if (ws_ref->ref_count < 1) { |
| 3202 | ws_ref->ref_count = 0; |
| 3203 | ws_ref->copy_count = 0; |
| 3204 | } |
| 3205 | diag_ws_release(); |
| 3206 | } |
| 3207 | spin_unlock_irqrestore(&ws_ref->lock, flags); |
| 3208 | } |
| 3209 | |
| 3210 | |
| 3211 | void diag_ws_on_copy(int type) |
| 3212 | { |
| 3213 | unsigned long flags; |
| 3214 | struct diag_ws_ref_t *ws_ref = NULL; |
| 3215 | |
| 3216 | switch (type) { |
| 3217 | case DIAG_WS_DCI: |
| 3218 | ws_ref = &driver->dci_ws; |
| 3219 | break; |
| 3220 | case DIAG_WS_MUX: |
| 3221 | ws_ref = &driver->md_ws; |
| 3222 | break; |
| 3223 | default: |
| 3224 | pr_err_ratelimited("diag: In %s, invalid type: %d\n", |
| 3225 | __func__, type); |
| 3226 | return; |
| 3227 | } |
| 3228 | |
| 3229 | spin_lock_irqsave(&ws_ref->lock, flags); |
| 3230 | ws_ref->copy_count++; |
| 3231 | spin_unlock_irqrestore(&ws_ref->lock, flags); |
| 3232 | } |
| 3233 | |
| 3234 | void diag_ws_on_copy_fail(int type) |
| 3235 | { |
| 3236 | unsigned long flags; |
| 3237 | struct diag_ws_ref_t *ws_ref = NULL; |
| 3238 | |
| 3239 | switch (type) { |
| 3240 | case DIAG_WS_DCI: |
| 3241 | ws_ref = &driver->dci_ws; |
| 3242 | break; |
| 3243 | case DIAG_WS_MUX: |
| 3244 | ws_ref = &driver->md_ws; |
| 3245 | break; |
| 3246 | default: |
| 3247 | pr_err_ratelimited("diag: In %s, invalid type: %d\n", |
| 3248 | __func__, type); |
| 3249 | return; |
| 3250 | } |
| 3251 | |
| 3252 | spin_lock_irqsave(&ws_ref->lock, flags); |
| 3253 | ws_ref->ref_count--; |
| 3254 | spin_unlock_irqrestore(&ws_ref->lock, flags); |
| 3255 | |
| 3256 | diag_ws_release(); |
| 3257 | } |
| 3258 | |
| 3259 | void diag_ws_on_copy_complete(int type) |
| 3260 | { |
| 3261 | unsigned long flags; |
| 3262 | struct diag_ws_ref_t *ws_ref = NULL; |
| 3263 | |
| 3264 | switch (type) { |
| 3265 | case DIAG_WS_DCI: |
| 3266 | ws_ref = &driver->dci_ws; |
| 3267 | break; |
| 3268 | case DIAG_WS_MUX: |
| 3269 | ws_ref = &driver->md_ws; |
| 3270 | break; |
| 3271 | default: |
| 3272 | pr_err_ratelimited("diag: In %s, invalid type: %d\n", |
| 3273 | __func__, type); |
| 3274 | return; |
| 3275 | } |
| 3276 | |
| 3277 | spin_lock_irqsave(&ws_ref->lock, flags); |
| 3278 | ws_ref->ref_count -= ws_ref->copy_count; |
| 3279 | if (ws_ref->ref_count < 1) |
| 3280 | ws_ref->ref_count = 0; |
| 3281 | ws_ref->copy_count = 0; |
| 3282 | spin_unlock_irqrestore(&ws_ref->lock, flags); |
| 3283 | |
| 3284 | diag_ws_release(); |
| 3285 | } |
| 3286 | |
| 3287 | void diag_ws_reset(int type) |
| 3288 | { |
| 3289 | unsigned long flags; |
| 3290 | struct diag_ws_ref_t *ws_ref = NULL; |
| 3291 | |
| 3292 | switch (type) { |
| 3293 | case DIAG_WS_DCI: |
| 3294 | ws_ref = &driver->dci_ws; |
| 3295 | break; |
| 3296 | case DIAG_WS_MUX: |
| 3297 | ws_ref = &driver->md_ws; |
| 3298 | break; |
| 3299 | default: |
| 3300 | pr_err_ratelimited("diag: In %s, invalid type: %d\n", |
| 3301 | __func__, type); |
| 3302 | return; |
| 3303 | } |
| 3304 | |
| 3305 | spin_lock_irqsave(&ws_ref->lock, flags); |
| 3306 | ws_ref->ref_count = 0; |
| 3307 | ws_ref->copy_count = 0; |
| 3308 | spin_unlock_irqrestore(&ws_ref->lock, flags); |
| 3309 | |
| 3310 | diag_ws_release(); |
| 3311 | } |
| 3312 | |
| 3313 | void diag_ws_release(void) |
| 3314 | { |
| 3315 | if (driver->dci_ws.ref_count == 0 && driver->md_ws.ref_count == 0) |
| 3316 | pm_relax(driver->diag_dev); |
| 3317 | } |
| 3318 | |
| 3319 | #ifdef DIAG_DEBUG |
| 3320 | static void diag_debug_init(void) |
| 3321 | { |
| 3322 | diag_ipc_log = ipc_log_context_create(DIAG_IPC_LOG_PAGES, "diag", 0); |
| 3323 | if (!diag_ipc_log) |
| 3324 | pr_err("diag: Failed to create IPC logging context\n"); |
| 3325 | /* |
| 3326 | * Set the bit mask here as per diag_ipc_logging.h to enable debug logs |
| 3327 | * to be logged to IPC |
| 3328 | */ |
| 3329 | diag_debug_mask = DIAG_DEBUG_PERIPHERALS | DIAG_DEBUG_DCI | |
| 3330 | DIAG_DEBUG_BRIDGE; |
| 3331 | } |
| 3332 | #else |
| 3333 | static void diag_debug_init(void) |
| 3334 | { |
| 3335 | |
| 3336 | } |
| 3337 | #endif |
| 3338 | |
| 3339 | static int diag_real_time_info_init(void) |
| 3340 | { |
| 3341 | int i; |
| 3342 | |
| 3343 | if (!driver) |
| 3344 | return -EIO; |
| 3345 | for (i = 0; i < DIAG_NUM_PROC; i++) { |
| 3346 | driver->real_time_mode[i] = 1; |
| 3347 | driver->proc_rt_vote_mask[i] |= DIAG_PROC_DCI; |
| 3348 | driver->proc_rt_vote_mask[i] |= DIAG_PROC_MEMORY_DEVICE; |
| 3349 | } |
| 3350 | driver->real_time_update_busy = 0; |
| 3351 | driver->proc_active_mask = 0; |
| 3352 | driver->diag_real_time_wq = create_singlethread_workqueue( |
| 3353 | "diag_real_time_wq"); |
| 3354 | if (!driver->diag_real_time_wq) |
| 3355 | return -ENOMEM; |
| 3356 | INIT_WORK(&(driver->diag_real_time_work), diag_real_time_work_fn); |
| 3357 | mutex_init(&driver->real_time_mutex); |
| 3358 | return 0; |
| 3359 | } |
| 3360 | |
| 3361 | static const struct file_operations diagcharfops = { |
| 3362 | .owner = THIS_MODULE, |
| 3363 | .read = diagchar_read, |
| 3364 | .write = diagchar_write, |
| 3365 | #ifdef CONFIG_COMPAT |
| 3366 | .compat_ioctl = diagchar_compat_ioctl, |
| 3367 | #endif |
| 3368 | .unlocked_ioctl = diagchar_ioctl, |
| 3369 | .open = diagchar_open, |
| 3370 | .release = diagchar_close |
| 3371 | }; |
| 3372 | |
| 3373 | static int diagchar_setup_cdev(dev_t devno) |
| 3374 | { |
| 3375 | |
| 3376 | int err; |
| 3377 | |
| 3378 | cdev_init(driver->cdev, &diagcharfops); |
| 3379 | |
| 3380 | driver->cdev->owner = THIS_MODULE; |
| 3381 | driver->cdev->ops = &diagcharfops; |
| 3382 | |
| 3383 | err = cdev_add(driver->cdev, devno, 1); |
| 3384 | |
| 3385 | if (err) { |
| 3386 | pr_info("diagchar cdev registration failed !\n"); |
| 3387 | return err; |
| 3388 | } |
| 3389 | |
| 3390 | driver->diagchar_class = class_create(THIS_MODULE, "diag"); |
| 3391 | |
| 3392 | if (IS_ERR(driver->diagchar_class)) { |
| 3393 | pr_err("Error creating diagchar class.\n"); |
| 3394 | return PTR_ERR(driver->diagchar_class); |
| 3395 | } |
| 3396 | |
| 3397 | driver->diag_dev = device_create(driver->diagchar_class, NULL, devno, |
| 3398 | (void *)driver, "diag"); |
| 3399 | |
| 3400 | if (!driver->diag_dev) |
| 3401 | return -EIO; |
| 3402 | |
| 3403 | driver->diag_dev->power.wakeup = wakeup_source_register("DIAG_WS"); |
| 3404 | return 0; |
| 3405 | |
| 3406 | } |
| 3407 | |
| 3408 | static int diagchar_cleanup(void) |
| 3409 | { |
| 3410 | if (driver) { |
| 3411 | if (driver->cdev) { |
| 3412 | /* TODO - Check if device exists before deleting */ |
| 3413 | device_destroy(driver->diagchar_class, |
| 3414 | MKDEV(driver->major, |
| 3415 | driver->minor_start)); |
| 3416 | cdev_del(driver->cdev); |
| 3417 | } |
| 3418 | if (!IS_ERR(driver->diagchar_class)) |
| 3419 | class_destroy(driver->diagchar_class); |
| 3420 | kfree(driver); |
| 3421 | } |
| 3422 | return 0; |
| 3423 | } |
| 3424 | |
| 3425 | static int __init diagchar_init(void) |
| 3426 | { |
| 3427 | dev_t dev; |
Manoj Prabhu B | 9832546 | 2017-01-10 20:19:28 +0530 | [diff] [blame] | 3428 | int ret, i; |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 3429 | |
| 3430 | pr_debug("diagfwd initializing ..\n"); |
| 3431 | ret = 0; |
| 3432 | driver = kzalloc(sizeof(struct diagchar_dev) + 5, GFP_KERNEL); |
| 3433 | if (!driver) |
| 3434 | return -ENOMEM; |
| 3435 | kmemleak_not_leak(driver); |
| 3436 | |
| 3437 | timer_in_progress = 0; |
| 3438 | driver->delayed_rsp_id = 0; |
| 3439 | driver->hdlc_disabled = 0; |
| 3440 | driver->dci_state = DIAG_DCI_NO_ERROR; |
| 3441 | setup_timer(&drain_timer, drain_timer_func, 1234); |
| 3442 | driver->supports_sockets = 1; |
| 3443 | driver->time_sync_enabled = 0; |
| 3444 | driver->uses_time_api = 0; |
| 3445 | driver->poolsize = poolsize; |
| 3446 | driver->poolsize_hdlc = poolsize_hdlc; |
| 3447 | driver->poolsize_dci = poolsize_dci; |
| 3448 | driver->poolsize_user = poolsize_user; |
| 3449 | /* |
| 3450 | * POOL_TYPE_MUX_APPS is for the buffers in the Diag MUX layer. |
| 3451 | * The number of buffers encompasses Diag data generated on |
| 3452 | * the Apss processor + 1 for the responses generated exclusively on |
| 3453 | * the Apps processor + data from data channels (4 channels per |
| 3454 | * peripheral) + data from command channels (2) |
| 3455 | */ |
| 3456 | diagmem_setsize(POOL_TYPE_MUX_APPS, itemsize_usb_apps, |
| 3457 | poolsize_usb_apps + 1 + (NUM_PERIPHERALS * 6)); |
| 3458 | driver->num_clients = max_clients; |
| 3459 | driver->logging_mode = DIAG_USB_MODE; |
| 3460 | driver->mask_check = 0; |
| 3461 | driver->in_busy_pktdata = 0; |
| 3462 | driver->in_busy_dcipktdata = 0; |
| 3463 | driver->rsp_buf_ctxt = SET_BUF_CTXT(APPS_DATA, TYPE_CMD, 1); |
| 3464 | hdlc_data.ctxt = SET_BUF_CTXT(APPS_DATA, TYPE_DATA, 1); |
| 3465 | hdlc_data.len = 0; |
| 3466 | non_hdlc_data.ctxt = SET_BUF_CTXT(APPS_DATA, TYPE_DATA, 1); |
| 3467 | non_hdlc_data.len = 0; |
| 3468 | mutex_init(&driver->hdlc_disable_mutex); |
| 3469 | mutex_init(&driver->diagchar_mutex); |
| 3470 | mutex_init(&driver->diag_maskclear_mutex); |
Manoj Prabhu B | 2a42827 | 2016-12-22 15:22:03 +0530 | [diff] [blame] | 3471 | mutex_init(&driver->diag_notifier_mutex); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 3472 | mutex_init(&driver->diag_file_mutex); |
| 3473 | mutex_init(&driver->delayed_rsp_mutex); |
| 3474 | mutex_init(&apps_data_mutex); |
Gopikrishna Mogasati | 9a44d8d | 2017-05-05 16:04:35 +0530 | [diff] [blame] | 3475 | mutex_init(&driver->msg_mask_lock); |
Manoj Prabhu B | 9832546 | 2017-01-10 20:19:28 +0530 | [diff] [blame] | 3476 | for (i = 0; i < NUM_PERIPHERALS; i++) |
| 3477 | mutex_init(&driver->diagfwd_channel_mutex[i]); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 3478 | init_waitqueue_head(&driver->wait_q); |
| 3479 | INIT_WORK(&(driver->diag_drain_work), diag_drain_work_fn); |
| 3480 | INIT_WORK(&(driver->update_user_clients), |
| 3481 | diag_update_user_client_work_fn); |
| 3482 | INIT_WORK(&(driver->update_md_clients), |
| 3483 | diag_update_md_client_work_fn); |
| 3484 | diag_ws_init(); |
| 3485 | diag_stats_init(); |
| 3486 | diag_debug_init(); |
| 3487 | diag_md_session_init(); |
| 3488 | |
| 3489 | driver->incoming_pkt.capacity = DIAG_MAX_REQ_SIZE; |
| 3490 | driver->incoming_pkt.data = kzalloc(DIAG_MAX_REQ_SIZE, GFP_KERNEL); |
| 3491 | if (!driver->incoming_pkt.data) { |
| 3492 | ret = -ENOMEM; |
| 3493 | goto fail; |
| 3494 | } |
| 3495 | kmemleak_not_leak(driver->incoming_pkt.data); |
| 3496 | driver->incoming_pkt.processing = 0; |
| 3497 | driver->incoming_pkt.read_len = 0; |
| 3498 | driver->incoming_pkt.remaining = 0; |
| 3499 | driver->incoming_pkt.total_len = 0; |
| 3500 | |
| 3501 | ret = diag_real_time_info_init(); |
| 3502 | if (ret) |
| 3503 | goto fail; |
| 3504 | ret = diag_debugfs_init(); |
| 3505 | if (ret) |
| 3506 | goto fail; |
| 3507 | ret = diag_masks_init(); |
| 3508 | if (ret) |
| 3509 | goto fail; |
| 3510 | ret = diag_remote_init(); |
| 3511 | if (ret) |
| 3512 | goto fail; |
| 3513 | ret = diag_mux_init(); |
| 3514 | if (ret) |
| 3515 | goto fail; |
| 3516 | ret = diagfwd_init(); |
| 3517 | if (ret) |
| 3518 | goto fail; |
| 3519 | ret = diagfwd_cntl_init(); |
| 3520 | if (ret) |
| 3521 | goto fail; |
| 3522 | driver->dci_state = diag_dci_init(); |
| 3523 | ret = diagfwd_peripheral_init(); |
| 3524 | if (ret) |
| 3525 | goto fail; |
| 3526 | diagfwd_cntl_channel_init(); |
| 3527 | if (driver->dci_state == DIAG_DCI_NO_ERROR) |
| 3528 | diag_dci_channel_init(); |
| 3529 | pr_debug("diagchar initializing ..\n"); |
| 3530 | driver->num = 1; |
| 3531 | driver->name = ((void *)driver) + sizeof(struct diagchar_dev); |
| 3532 | strlcpy(driver->name, "diag", 4); |
| 3533 | /* Get major number from kernel and initialize */ |
| 3534 | ret = alloc_chrdev_region(&dev, driver->minor_start, |
| 3535 | driver->num, driver->name); |
| 3536 | if (!ret) { |
| 3537 | driver->major = MAJOR(dev); |
| 3538 | driver->minor_start = MINOR(dev); |
| 3539 | } else { |
| 3540 | pr_err("diag: Major number not allocated\n"); |
| 3541 | goto fail; |
| 3542 | } |
| 3543 | driver->cdev = cdev_alloc(); |
| 3544 | ret = diagchar_setup_cdev(dev); |
| 3545 | if (ret) |
| 3546 | goto fail; |
Sreelakshmi Gownipalli | 8d477d3 | 2017-02-08 19:49:06 -0800 | [diff] [blame] | 3547 | mutex_init(&driver->diag_id_mutex); |
| 3548 | INIT_LIST_HEAD(&driver->diag_id_list); |
| 3549 | diag_add_diag_id_to_list(DIAG_ID_APPS, "APPS"); |
Sreelakshmi Gownipalli | cb8893d | 2016-10-19 16:02:34 -0700 | [diff] [blame] | 3550 | pr_debug("diagchar initialized now"); |
| 3551 | ret = diagfwd_bridge_init(); |
| 3552 | if (ret) |
| 3553 | diagfwd_bridge_exit(); |
| 3554 | return 0; |
| 3555 | |
| 3556 | fail: |
| 3557 | pr_err("diagchar is not initialized, ret: %d\n", ret); |
| 3558 | diag_debugfs_cleanup(); |
| 3559 | diagchar_cleanup(); |
| 3560 | diag_mux_exit(); |
| 3561 | diagfwd_peripheral_exit(); |
| 3562 | diagfwd_bridge_exit(); |
| 3563 | diagfwd_exit(); |
| 3564 | diagfwd_cntl_exit(); |
| 3565 | diag_dci_exit(); |
| 3566 | diag_masks_exit(); |
| 3567 | diag_remote_exit(); |
| 3568 | return ret; |
| 3569 | |
| 3570 | } |
| 3571 | |
| 3572 | static void diagchar_exit(void) |
| 3573 | { |
| 3574 | pr_info("diagchar exiting...\n"); |
| 3575 | diag_mempool_exit(); |
| 3576 | diag_mux_exit(); |
| 3577 | diagfwd_peripheral_exit(); |
| 3578 | diagfwd_exit(); |
| 3579 | diagfwd_cntl_exit(); |
| 3580 | diag_dci_exit(); |
| 3581 | diag_masks_exit(); |
| 3582 | diag_md_session_exit(); |
| 3583 | diag_remote_exit(); |
| 3584 | diag_debugfs_cleanup(); |
| 3585 | diagchar_cleanup(); |
| 3586 | pr_info("done diagchar exit\n"); |
| 3587 | } |
| 3588 | |
| 3589 | module_init(diagchar_init); |
| 3590 | module_exit(diagchar_exit); |