/* Copyright (c) 2008-2015, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_DIAG_OVER_USB #include #endif #include #include "diagchar_hdlc.h" #include "diagmem.h" #include "diagchar.h" #include "diagfwd.h" #include "diagfwd_cntl.h" #include "diag_dci.h" #include "diag_debugfs.h" #include "diag_masks.h" #include "diagfwd_bridge.h" #include "diag_usb.h" #include "diag_memorydevice.h" #include "diag_mux.h" #include "diag_ipc_logging.h" #include "diagfwd_peripheral.h" #include #include #ifdef CONFIG_COMPAT #include #endif MODULE_DESCRIPTION("Diag Char Driver"); MODULE_LICENSE("GPL v2"); MODULE_VERSION("1.0"); #define MIN_SIZ_ALLOW 4 #define INIT 1 #define EXIT -1 struct diagchar_dev *driver; struct diagchar_priv { int pid; }; #define USER_SPACE_RAW_DATA 0 #define USER_SPACE_HDLC_DATA 1 /* Memory pool variables */ /* Used for copying any incoming packet from user space clients. */ static unsigned int poolsize = 12; module_param(poolsize, uint, 0); /* * Used for HDLC encoding packets coming from the user * space. */ static unsigned int poolsize_hdlc = 10; module_param(poolsize_hdlc, uint, 0); /* * This is used for incoming DCI requests from the user space clients. * Don't expose itemsize as it is internal. */ static unsigned int poolsize_user = 8; module_param(poolsize_user, uint, 0); /* * USB structures allocated for writing Diag data generated on the Apps to USB. * Don't expose itemsize as it is constant. */ static unsigned int itemsize_usb_apps = sizeof(struct diag_request); static unsigned int poolsize_usb_apps = 10; module_param(poolsize_usb_apps, uint, 0); /* Used for DCI client buffers. Don't expose itemsize as it is constant. */ static unsigned int poolsize_dci = 10; module_param(poolsize_dci, uint, 0); #ifdef CONFIG_DIAGFWD_BRIDGE_CODE /* Used for reading data from the remote device. */ static unsigned int itemsize_mdm = DIAG_MDM_BUF_SIZE; static unsigned int poolsize_mdm = 9; module_param(itemsize_mdm, uint, 0); module_param(poolsize_mdm, uint, 0); /* * Used for reading DCI data from the remote device. * Don't expose poolsize for DCI data. There is only one read buffer */ static unsigned int itemsize_mdm_dci = DIAG_MDM_BUF_SIZE; static unsigned int poolsize_mdm_dci = 1; module_param(itemsize_mdm_dci, uint, 0); /* * Used for USB structues associated with a remote device. * Don't expose the itemsize since it is constant. */ static unsigned int itemsize_mdm_usb = sizeof(struct diag_request); static unsigned int poolsize_mdm_usb = 9; module_param(poolsize_mdm_usb, uint, 0); /* * Used for writing read DCI data to remote peripherals. Don't * expose poolsize for DCI data. There is only one read * buffer. Add 6 bytes for DCI header information: Start (1), * Version (1), Length (2), Tag (2) */ static unsigned int itemsize_mdm_dci_write = DIAG_MDM_DCI_BUF_SIZE; static unsigned int poolsize_mdm_dci_write = 1; module_param(itemsize_mdm_dci_write, uint, 0); /* * Used for USB structures associated with a remote SMUX * device Don't expose the itemsize since it is constant */ static unsigned int itemsize_qsc_usb = sizeof(struct diag_request); static unsigned int poolsize_qsc_usb = 8; module_param(poolsize_qsc_usb, uint, 0); #endif /* This is the max number of user-space clients supported at initialization*/ static unsigned int max_clients = 15; static unsigned int threshold_client_limit = 50; module_param(max_clients, uint, 0); /* Timer variables */ static struct timer_list drain_timer; static int timer_in_progress; struct diag_apps_data_t { void *buf; uint32_t len; int ctxt; }; static struct diag_apps_data_t hdlc_data; static struct diag_apps_data_t non_hdlc_data; static struct mutex apps_data_mutex; #define DIAGPKT_MAX_DELAYED_RSP 0xFFFF #ifdef DIAG_DEBUG uint16_t diag_debug_mask; void *diag_ipc_log; #endif static void diag_md_session_close(struct diag_md_session_t *session_info); /* * Returns the next delayed rsp id. If wrapping is enabled, * wraps the delayed rsp id to DIAGPKT_MAX_DELAYED_RSP. */ static uint16_t diag_get_next_delayed_rsp_id(void) { uint16_t rsp_id = 0; mutex_lock(&driver->delayed_rsp_mutex); rsp_id = driver->delayed_rsp_id; if (rsp_id < DIAGPKT_MAX_DELAYED_RSP) rsp_id++; else { if (wrap_enabled) { rsp_id = 1; wrap_count++; } else rsp_id = DIAGPKT_MAX_DELAYED_RSP; } driver->delayed_rsp_id = rsp_id; mutex_unlock(&driver->delayed_rsp_mutex); return rsp_id; } static int diag_switch_logging(struct diag_logging_mode_param_t *param); #define COPY_USER_SPACE_OR_EXIT(buf, data, length) \ do { \ if ((count < ret+length) || (copy_to_user(buf, \ (void *)&data, length))) { \ ret = -EFAULT; \ goto exit; \ } \ ret += length; \ } while (0) static void drain_timer_func(unsigned long data) { queue_work(driver->diag_wq , &(driver->diag_drain_work)); } static void diag_drain_apps_data(struct diag_apps_data_t *data) { int err = 0; if (!data || !data->buf) return; err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, data->ctxt); if (err) diagmem_free(driver, data->buf, POOL_TYPE_HDLC); data->buf = NULL; data->len = 0; } void diag_update_user_client_work_fn(struct work_struct *work) { diag_update_userspace_clients(HDLC_SUPPORT_TYPE); } static void diag_update_md_client_work_fn(struct work_struct *work) { diag_update_md_clients(HDLC_SUPPORT_TYPE); } void diag_drain_work_fn(struct work_struct *work) { struct diag_md_session_t *session_info = NULL; uint8_t hdlc_disabled = 0; timer_in_progress = 0; mutex_lock(&apps_data_mutex); session_info = diag_md_session_get_peripheral(APPS_DATA); if (session_info) hdlc_disabled = session_info->hdlc_disabled; else hdlc_disabled = driver->hdlc_disabled; if (!hdlc_disabled) diag_drain_apps_data(&hdlc_data); else diag_drain_apps_data(&non_hdlc_data); mutex_unlock(&apps_data_mutex); } void check_drain_timer(void) { int ret = 0; if (!timer_in_progress) { timer_in_progress = 1; ret = mod_timer(&drain_timer, jiffies + msecs_to_jiffies(200)); } } void diag_add_client(int i, struct file *file) { struct diagchar_priv *diagpriv_data; driver->client_map[i].pid = current->tgid; diagpriv_data = kmalloc(sizeof(struct diagchar_priv), GFP_KERNEL); if (diagpriv_data) diagpriv_data->pid = current->tgid; file->private_data = diagpriv_data; strlcpy(driver->client_map[i].name, current->comm, 20); driver->client_map[i].name[19] = '\0'; } static void diag_mempool_init(void) { uint32_t itemsize = DIAG_MAX_REQ_SIZE; uint32_t itemsize_hdlc = DIAG_MAX_HDLC_BUF_SIZE + APF_DIAG_PADDING; uint32_t itemsize_dci = IN_BUF_SIZE; uint32_t itemsize_user = DCI_REQ_BUF_SIZE; itemsize += ((DCI_HDR_SIZE > CALLBACK_HDR_SIZE) ? DCI_HDR_SIZE : CALLBACK_HDR_SIZE); diagmem_setsize(POOL_TYPE_COPY, itemsize, poolsize); diagmem_setsize(POOL_TYPE_HDLC, itemsize_hdlc, poolsize_hdlc); diagmem_setsize(POOL_TYPE_DCI, itemsize_dci, poolsize_dci); diagmem_setsize(POOL_TYPE_USER, itemsize_user, poolsize_user); diagmem_init(driver, POOL_TYPE_COPY); diagmem_init(driver, POOL_TYPE_HDLC); diagmem_init(driver, POOL_TYPE_USER); diagmem_init(driver, POOL_TYPE_DCI); } static void diag_mempool_exit(void) { diagmem_exit(driver, POOL_TYPE_COPY); diagmem_exit(driver, POOL_TYPE_HDLC); diagmem_exit(driver, POOL_TYPE_USER); diagmem_exit(driver, POOL_TYPE_DCI); } static int diagchar_open(struct inode *inode, struct file *file) { int i = 0; void *temp; if (driver) { mutex_lock(&driver->diagchar_mutex); for (i = 0; i < driver->num_clients; i++) if (driver->client_map[i].pid == 0) break; if (i < driver->num_clients) { diag_add_client(i, file); } else { if (i < threshold_client_limit) { driver->num_clients++; temp = krealloc(driver->client_map , (driver->num_clients) * sizeof(struct diag_client_map), GFP_KERNEL); if (!temp) goto fail; else driver->client_map = temp; temp = krealloc(driver->data_ready , (driver->num_clients) * sizeof(int), GFP_KERNEL); if (!temp) goto fail; else driver->data_ready = temp; diag_add_client(i, file); } else { mutex_unlock(&driver->diagchar_mutex); pr_alert("Max client limit for DIAG reached\n"); pr_info("Cannot open handle %s" " %d", current->comm, current->tgid); for (i = 0; i < driver->num_clients; i++) pr_debug("%d) %s PID=%d", i, driver-> client_map[i].name, driver->client_map[i].pid); return -ENOMEM; } } driver->data_ready[i] = 0x0; driver->data_ready[i] |= MSG_MASKS_TYPE; driver->data_ready[i] |= EVENT_MASKS_TYPE; driver->data_ready[i] |= LOG_MASKS_TYPE; driver->data_ready[i] |= DCI_LOG_MASKS_TYPE; driver->data_ready[i] |= DCI_EVENT_MASKS_TYPE; if (driver->ref_count == 0) diag_mempool_init(); driver->ref_count++; mutex_unlock(&driver->diagchar_mutex); return 0; } return -ENOMEM; fail: mutex_unlock(&driver->diagchar_mutex); driver->num_clients--; pr_alert("diag: Insufficient memory for new client"); return -ENOMEM; } static void diag_close_logging_process(const int pid) { int i; int session_peripheral_mask; struct diag_md_session_t *session_info = NULL; struct diag_logging_mode_param_t params; session_info = diag_md_session_get_pid(pid); if (!session_info) return; session_peripheral_mask = session_info->peripheral_mask; diag_md_session_close(session_info); for (i = 0; i < NUM_MD_SESSIONS; i++) if (MD_PERIPHERAL_MASK(i) & session_peripheral_mask) diag_mux_close_peripheral(DIAG_LOCAL_PROC, i); params.req_mode = USB_MODE; params.mode_param = 0; params.peripheral_mask = 0; mutex_lock(&driver->diagchar_mutex); diag_switch_logging(¶ms); mutex_unlock(&driver->diagchar_mutex); } static int diag_remove_client_entry(struct file *file) { int i = -1; struct diagchar_priv *diagpriv_data = NULL; struct diag_dci_client_tbl *dci_entry = NULL; if (!driver) return -ENOMEM; mutex_lock(&driver->diag_file_mutex); if (!file) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "Invalid file pointer\n"); mutex_unlock(&driver->diag_file_mutex); return -ENOENT; } if (!(file->private_data)) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "Invalid private data\n"); mutex_unlock(&driver->diag_file_mutex); return -EINVAL; } diagpriv_data = file->private_data; /* clean up any DCI registrations, if this is a DCI client * This will specially help in case of ungraceful exit of any DCI client * This call will remove any pending registrations of such client */ dci_entry = dci_lookup_client_entry_pid(current->tgid); if (dci_entry) diag_dci_deinit_client(dci_entry); diag_close_logging_process(current->tgid); /* Delete the pkt response table entry for the exiting process */ diag_cmd_remove_reg_by_pid(current->tgid); mutex_lock(&driver->diagchar_mutex); driver->ref_count--; if (driver->ref_count == 0) diag_mempool_exit(); for (i = 0; i < driver->num_clients; i++) { if (NULL != diagpriv_data && diagpriv_data->pid == driver->client_map[i].pid) { driver->client_map[i].pid = 0; kfree(diagpriv_data); diagpriv_data = NULL; file->private_data = 0; break; } } mutex_unlock(&driver->diagchar_mutex); mutex_unlock(&driver->diag_file_mutex); return 0; } static int diagchar_close(struct inode *inode, struct file *file) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "diag: process exit %s\n", current->comm); return diag_remove_client_entry(file); } void diag_record_stats(int type, int flag) { struct diag_pkt_stats_t *pkt_stats = NULL; switch (type) { case DATA_TYPE_EVENT: pkt_stats = &driver->event_stats; break; case DATA_TYPE_F3: pkt_stats = &driver->msg_stats; break; case DATA_TYPE_LOG: pkt_stats = &driver->log_stats; break; case DATA_TYPE_RESPONSE: if (flag != PKT_DROP) return; pr_err_ratelimited("diag: In %s, dropping response. This shouldn't happen\n", __func__); return; case DATA_TYPE_DELAYED_RESPONSE: /* No counters to increase for Delayed responses */ return; default: pr_err_ratelimited("diag: In %s, invalid pkt_type: %d\n", __func__, type); return; } switch (flag) { case PKT_ALLOC: atomic_add(1, (atomic_t *)&pkt_stats->alloc_count); break; case PKT_DROP: atomic_add(1, (atomic_t *)&pkt_stats->drop_count); break; case PKT_RESET: atomic_set((atomic_t *)&pkt_stats->alloc_count, 0); atomic_set((atomic_t *)&pkt_stats->drop_count, 0); break; default: pr_err_ratelimited("diag: In %s, invalid flag: %d\n", __func__, flag); return; } } void diag_get_timestamp(char *time_str) { struct timeval t; struct tm broken_tm; do_gettimeofday(&t); if (!time_str) return; time_to_tm(t.tv_sec, 0, &broken_tm); scnprintf(time_str, DIAG_TS_SIZE, "%d:%d:%d:%ld", broken_tm.tm_hour, broken_tm.tm_min, broken_tm.tm_sec, t.tv_usec); } int diag_get_remote(int remote_info) { int val = (remote_info < 0) ? -remote_info : remote_info; int remote_val; switch (val) { case MDM: case MDM2: case QSC: remote_val = -remote_info; break; default: remote_val = 0; break; } return remote_val; } int diag_cmd_chk_polling(struct diag_cmd_reg_entry_t *entry) { int polling = DIAG_CMD_NOT_POLLING; if (!entry) return -EIO; if (entry->cmd_code == DIAG_CMD_NO_SUBSYS) { if (entry->subsys_id == DIAG_CMD_NO_SUBSYS && entry->cmd_code_hi >= DIAG_CMD_STATUS && entry->cmd_code_lo <= DIAG_CMD_STATUS) polling = DIAG_CMD_POLLING; else if (entry->subsys_id == DIAG_SS_WCDMA && entry->cmd_code_hi >= DIAG_CMD_QUERY_CALL && entry->cmd_code_lo <= DIAG_CMD_QUERY_CALL) polling = DIAG_CMD_POLLING; else if (entry->subsys_id == DIAG_SS_GSM && entry->cmd_code_hi >= DIAG_CMD_QUERY_TMC && entry->cmd_code_lo <= DIAG_CMD_QUERY_TMC) polling = DIAG_CMD_POLLING; else if (entry->subsys_id == DIAG_SS_PARAMS && entry->cmd_code_hi >= DIAG_DIAG_POLL && entry->cmd_code_lo <= DIAG_DIAG_POLL) polling = DIAG_CMD_POLLING; else if (entry->subsys_id == DIAG_SS_TDSCDMA && entry->cmd_code_hi >= DIAG_CMD_TDSCDMA_STATUS && entry->cmd_code_lo <= DIAG_CMD_TDSCDMA_STATUS) polling = DIAG_CMD_POLLING; } return polling; } static void diag_cmd_invalidate_polling(int change_flag) { int polling = DIAG_CMD_NOT_POLLING; struct list_head *start; struct list_head *temp; struct diag_cmd_reg_t *item = NULL; if (change_flag == DIAG_CMD_ADD) { if (driver->polling_reg_flag) return; } driver->polling_reg_flag = 0; list_for_each_safe(start, temp, &driver->cmd_reg_list) { item = list_entry(start, struct diag_cmd_reg_t, link); polling = diag_cmd_chk_polling(&item->entry); if (polling == DIAG_CMD_POLLING) { driver->polling_reg_flag = 1; break; } } } int diag_cmd_add_reg(struct diag_cmd_reg_entry_t *new_entry, uint8_t proc, int pid) { struct diag_cmd_reg_t *new_item = NULL; if (!new_entry) { pr_err("diag: In %s, invalid new entry\n", __func__); return -EINVAL; } if (proc > APPS_DATA) { pr_err("diag: In %s, invalid peripheral %d\n", __func__, proc); return -EINVAL; } if (proc != APPS_DATA) pid = INVALID_PID; new_item = kzalloc(sizeof(struct diag_cmd_reg_t), GFP_KERNEL); if (!new_item) { pr_err("diag: In %s, unable to create memory for new command registration\n", __func__); return -ENOMEM; } kmemleak_not_leak(new_item); new_item->pid = pid; new_item->proc = proc; memcpy(&new_item->entry, new_entry, sizeof(struct diag_cmd_reg_entry_t)); INIT_LIST_HEAD(&new_item->link); mutex_lock(&driver->cmd_reg_mutex); list_add_tail(&new_item->link, &driver->cmd_reg_list); driver->cmd_reg_count++; diag_cmd_invalidate_polling(DIAG_CMD_ADD); mutex_unlock(&driver->cmd_reg_mutex); return 0; } struct diag_cmd_reg_entry_t *diag_cmd_search( struct diag_cmd_reg_entry_t *entry, int proc) { struct list_head *start; struct list_head *temp; struct diag_cmd_reg_t *item = NULL; struct diag_cmd_reg_entry_t *temp_entry = NULL; if (!entry) { pr_err("diag: In %s, invalid entry\n", __func__); return NULL; } list_for_each_safe(start, temp, &driver->cmd_reg_list) { item = list_entry(start, struct diag_cmd_reg_t, link); temp_entry = &item->entry; if (temp_entry->cmd_code == entry->cmd_code && temp_entry->subsys_id == entry->subsys_id && temp_entry->cmd_code_hi >= entry->cmd_code_hi && temp_entry->cmd_code_lo <= entry->cmd_code_lo && (proc == item->proc || proc == ALL_PROC)) { return &item->entry; } else if (temp_entry->cmd_code == DIAG_CMD_NO_SUBSYS && entry->cmd_code == DIAG_CMD_DIAG_SUBSYS) { if (temp_entry->subsys_id == entry->subsys_id && temp_entry->cmd_code_hi >= entry->cmd_code_hi && temp_entry->cmd_code_lo <= entry->cmd_code_lo && (proc == item->proc || proc == ALL_PROC)) { return &item->entry; } } else if (temp_entry->cmd_code == DIAG_CMD_NO_SUBSYS && temp_entry->subsys_id == DIAG_CMD_NO_SUBSYS) { if ((temp_entry->cmd_code_hi >= entry->cmd_code) && (temp_entry->cmd_code_lo <= entry->cmd_code) && (proc == item->proc || proc == ALL_PROC)) { if (entry->cmd_code == MODE_CMD) { if (entry->subsys_id == RESET_ID && item->proc != APPS_DATA) { continue; } if (entry->subsys_id != RESET_ID && item->proc == APPS_DATA) { continue; } } return &item->entry; } } } return NULL; } void diag_cmd_remove_reg(struct diag_cmd_reg_entry_t *entry, uint8_t proc) { struct diag_cmd_reg_t *item = NULL; struct diag_cmd_reg_entry_t *temp_entry; if (!entry) { pr_err("diag: In %s, invalid entry\n", __func__); return; } mutex_lock(&driver->cmd_reg_mutex); temp_entry = diag_cmd_search(entry, proc); if (temp_entry) { item = container_of(temp_entry, struct diag_cmd_reg_t, entry); if (!item) { mutex_unlock(&driver->cmd_reg_mutex); return; } list_del(&item->link); kfree(item); driver->cmd_reg_count--; } diag_cmd_invalidate_polling(DIAG_CMD_REMOVE); mutex_unlock(&driver->cmd_reg_mutex); } void diag_cmd_remove_reg_by_pid(int pid) { struct list_head *start; struct list_head *temp; struct diag_cmd_reg_t *item = NULL; mutex_lock(&driver->cmd_reg_mutex); list_for_each_safe(start, temp, &driver->cmd_reg_list) { item = list_entry(start, struct diag_cmd_reg_t, link); if (item->pid == pid) { list_del(&item->link); kfree(item); driver->cmd_reg_count--; } } mutex_unlock(&driver->cmd_reg_mutex); } void diag_cmd_remove_reg_by_proc(int proc) { struct list_head *start; struct list_head *temp; struct diag_cmd_reg_t *item = NULL; mutex_lock(&driver->cmd_reg_mutex); list_for_each_safe(start, temp, &driver->cmd_reg_list) { item = list_entry(start, struct diag_cmd_reg_t, link); if (item->proc == proc) { list_del(&item->link); kfree(item); driver->cmd_reg_count--; } } diag_cmd_invalidate_polling(DIAG_CMD_REMOVE); mutex_unlock(&driver->cmd_reg_mutex); } static int diag_copy_dci(char __user *buf, size_t count, struct diag_dci_client_tbl *entry, int *pret) { int total_data_len = 0; int ret = 0; int exit_stat = 1; uint8_t drain_again = 0; struct diag_dci_buffer_t *buf_entry, *temp; if (!buf || !entry || !pret) return exit_stat; ret = *pret; ret += sizeof(int); if (ret >= count) { pr_err("diag: In %s, invalid value for ret: %d, count: %zu\n", __func__, ret, count); return -EINVAL; } mutex_lock(&entry->write_buf_mutex); list_for_each_entry_safe(buf_entry, temp, &entry->list_write_buf, buf_track) { if ((ret + buf_entry->data_len) > count) { drain_again = 1; break; } list_del(&buf_entry->buf_track); mutex_lock(&buf_entry->data_mutex); if ((buf_entry->data_len > 0) && (buf_entry->in_busy) && (buf_entry->data)) { if (copy_to_user(buf+ret, (void *)buf_entry->data, buf_entry->data_len)) goto drop; ret += buf_entry->data_len; total_data_len += buf_entry->data_len; diag_ws_on_copy(DIAG_WS_DCI); drop: buf_entry->in_busy = 0; buf_entry->data_len = 0; buf_entry->in_list = 0; if (buf_entry->buf_type == DCI_BUF_CMD) { mutex_unlock(&buf_entry->data_mutex); continue; } else if (buf_entry->buf_type == DCI_BUF_SECONDARY) { diagmem_free(driver, buf_entry->data, POOL_TYPE_DCI); buf_entry->data = NULL; mutex_unlock(&buf_entry->data_mutex); kfree(buf_entry); continue; } } mutex_unlock(&buf_entry->data_mutex); } if (total_data_len > 0) { /* Copy the total data length */ COPY_USER_SPACE_OR_EXIT(buf+8, total_data_len, 4); ret -= 4; } else { pr_debug("diag: In %s, Trying to copy ZERO bytes, total_data_len: %d\n", __func__, total_data_len); } exit_stat = 0; exit: entry->in_service = 0; mutex_unlock(&entry->write_buf_mutex); *pret = ret; if (drain_again) dci_drain_data(0); return exit_stat; } #ifdef CONFIG_DIAGFWD_BRIDGE_CODE static int diag_remote_init(void) { diagmem_setsize(POOL_TYPE_MDM, itemsize_mdm, poolsize_mdm); diagmem_setsize(POOL_TYPE_MDM2, itemsize_mdm, poolsize_mdm); diagmem_setsize(POOL_TYPE_MDM_DCI, itemsize_mdm_dci, poolsize_mdm_dci); diagmem_setsize(POOL_TYPE_MDM2_DCI, itemsize_mdm_dci, poolsize_mdm_dci); diagmem_setsize(POOL_TYPE_MDM_MUX, itemsize_mdm_usb, poolsize_mdm_usb); diagmem_setsize(POOL_TYPE_MDM2_MUX, itemsize_mdm_usb, poolsize_mdm_usb); diagmem_setsize(POOL_TYPE_MDM_DCI_WRITE, itemsize_mdm_dci_write, poolsize_mdm_dci_write); diagmem_setsize(POOL_TYPE_MDM2_DCI_WRITE, itemsize_mdm_dci_write, poolsize_mdm_dci_write); diagmem_setsize(POOL_TYPE_QSC_MUX, itemsize_qsc_usb, poolsize_qsc_usb); driver->hdlc_encode_buf = kzalloc(DIAG_MAX_HDLC_BUF_SIZE, GFP_KERNEL); if (!driver->hdlc_encode_buf) return -ENOMEM; driver->hdlc_encode_buf_len = 0; return 0; } static void diag_remote_exit(void) { kfree(driver->hdlc_encode_buf); } static int diag_send_raw_data_remote(int proc, void *buf, int len, uint8_t hdlc_flag) { int err = 0; int max_len = 0; uint8_t retry_count = 0; uint8_t max_retries = 3; uint16_t payload = 0; struct diag_send_desc_type send = { NULL, NULL, DIAG_STATE_START, 0 }; struct diag_hdlc_dest_type enc = { NULL, NULL, 0 }; int bridge_index = proc - 1; struct diag_md_session_t *session_info = NULL; uint8_t hdlc_disabled = 0; if (!buf) return -EINVAL; if (len <= 0) { pr_err("diag: In %s, invalid len: %d", __func__, len); return -EBADMSG; } if (bridge_index < 0 || bridge_index > NUM_REMOTE_DEV) { pr_err("diag: In %s, invalid bridge index: %d\n", __func__, bridge_index); return -EINVAL; } do { if (driver->hdlc_encode_buf_len == 0) break; usleep_range(10000, 10100); retry_count++; } while (retry_count < max_retries); if (driver->hdlc_encode_buf_len != 0) return -EAGAIN; session_info = diag_md_session_get_peripheral(APPS_DATA); if (session_info) hdlc_disabled = session_info->hdlc_disabled; else hdlc_disabled = driver->hdlc_disabled; if (hdlc_disabled) { payload = *(uint16_t *)(buf + 2); driver->hdlc_encode_buf_len = payload; /* * Adding 4 bytes for start (1 byte), version (1 byte) and * payload (2 bytes) */ memcpy(driver->hdlc_encode_buf, buf + 4, payload); goto send_data; } if (hdlc_flag) { if (DIAG_MAX_HDLC_BUF_SIZE < len) { pr_err("diag: Dropping packet, HDLC encoded packet payload size crosses buffer limit. Current payload size %d\n", len); return -EBADMSG; } driver->hdlc_encode_buf_len = len; memcpy(driver->hdlc_encode_buf, buf, len); goto send_data; } /* * The worst case length will be twice as the incoming packet length. * Add 3 bytes for CRC bytes (2 bytes) and delimiter (1 byte) */ max_len = (2 * len) + 3; if (DIAG_MAX_HDLC_BUF_SIZE < max_len) { pr_err("diag: Dropping packet, HDLC encoded packet payload size crosses buffer limit. Current payload size %d\n", max_len); return -EBADMSG; } /* Perform HDLC encoding on incoming data */ send.state = DIAG_STATE_START; send.pkt = (void *)(buf); send.last = (void *)(buf + len - 1); send.terminate = 1; enc.dest = driver->hdlc_encode_buf; enc.dest_last = (void *)(driver->hdlc_encode_buf + max_len - 1); diag_hdlc_encode(&send, &enc); driver->hdlc_encode_buf_len = (int)(enc.dest - (void *)driver->hdlc_encode_buf); send_data: err = diagfwd_bridge_write(proc, driver->hdlc_encode_buf, driver->hdlc_encode_buf_len); if (err) { pr_err_ratelimited("diag: Error writing Callback packet to proc: %d, err: %d\n", proc, err); driver->hdlc_encode_buf_len = 0; } return err; } static int diag_process_userspace_remote(int proc, void *buf, int len) { int bridge_index = proc - 1; if (!buf || len < 0) { pr_err("diag: Invalid input in %s, buf: %p, len: %d\n", __func__, buf, len); return -EINVAL; } if (bridge_index < 0 || bridge_index > NUM_REMOTE_DEV) { pr_err("diag: In %s, invalid bridge index: %d\n", __func__, bridge_index); return -EINVAL; } driver->user_space_data_busy = 1; return diagfwd_bridge_write(bridge_index, buf, len); } #else static int diag_remote_init(void) { return 0; } static void diag_remote_exit(void) { return; } int diagfwd_bridge_init(void) { return 0; } void diagfwd_bridge_exit(void) { return; } uint16_t diag_get_remote_device_mask(void) { return 0; } static int diag_send_raw_data_remote(int proc, void *buf, int len, uint8_t hdlc_flag) { return -EINVAL; } static int diag_process_userspace_remote(int proc, void *buf, int len) { return 0; } #endif static int mask_request_validate(unsigned char mask_buf[]) { uint8_t packet_id; uint8_t subsys_id; uint16_t ss_cmd; packet_id = mask_buf[0]; if (packet_id == DIAG_CMD_DIAG_SUBSYS_DELAY) { subsys_id = mask_buf[1]; ss_cmd = *(uint16_t *)(mask_buf + 2); switch (subsys_id) { case DIAG_SS_DIAG: if ((ss_cmd == DIAG_SS_FILE_READ_MODEM) || (ss_cmd == DIAG_SS_FILE_READ_ADSP) || (ss_cmd == DIAG_SS_FILE_READ_WCNSS) || (ss_cmd == DIAG_SS_FILE_READ_SLPI) || (ss_cmd == DIAG_SS_FILE_READ_APPS)) return 1; break; default: return 0; } } else if (packet_id == 0x4B) { subsys_id = mask_buf[1]; ss_cmd = *(uint16_t *)(mask_buf + 2); /* Packets with SSID which are allowed */ switch (subsys_id) { case 0x04: /* DIAG_SUBSYS_WCDMA */ if ((ss_cmd == 0) || (ss_cmd == 0xF)) return 1; break; case 0x08: /* DIAG_SUBSYS_GSM */ if ((ss_cmd == 0) || (ss_cmd == 0x1)) return 1; break; case 0x09: /* DIAG_SUBSYS_UMTS */ case 0x0F: /* DIAG_SUBSYS_CM */ if (ss_cmd == 0) return 1; break; case 0x0C: /* DIAG_SUBSYS_OS */ if ((ss_cmd == 2) || (ss_cmd == 0x100)) return 1; /* MPU and APU */ break; case 0x12: /* DIAG_SUBSYS_DIAG_SERV */ if ((ss_cmd == 0) || (ss_cmd == 0x6) || (ss_cmd == 0x7)) return 1; else if (ss_cmd == 0x218) /* HDLC Disabled Command*/ return 0; else if (ss_cmd == DIAG_GET_TIME_API) return 1; else if (ss_cmd == DIAG_SET_TIME_API) return 1; else if (ss_cmd == DIAG_SWITCH_COMMAND) return 1; else if (ss_cmd == DIAG_BUFFERING_MODE) return 1; break; case 0x13: /* DIAG_SUBSYS_FS */ if ((ss_cmd == 0) || (ss_cmd == 0x1)) return 1; break; default: return 0; break; } } else { switch (packet_id) { case 0x00: /* Version Number */ case 0x0C: /* CDMA status packet */ case 0x1C: /* Diag Version */ case 0x1D: /* Time Stamp */ case 0x60: /* Event Report Control */ case 0x63: /* Status snapshot */ case 0x73: /* Logging Configuration */ case 0x7C: /* Extended build ID */ case 0x7D: /* Extended Message configuration */ case 0x81: /* Event get mask */ case 0x82: /* Set the event mask */ return 1; break; default: return 0; break; } } return 0; } static void diag_md_session_init(void) { int i; mutex_init(&driver->md_session_lock); driver->md_session_mask = 0; driver->md_session_mode = DIAG_MD_NONE; for (i = 0; i < NUM_MD_SESSIONS; i++) driver->md_session_map[i] = NULL; } static void diag_md_session_exit(void) { int i; struct diag_md_session_t *session_info = NULL; for (i = 0; i < NUM_MD_SESSIONS; i++) { if (driver->md_session_map[i]) { session_info = driver->md_session_map[i]; diag_log_mask_free(session_info->log_mask); kfree(session_info->log_mask); session_info->log_mask = NULL; diag_msg_mask_free(session_info->msg_mask); kfree(session_info->msg_mask); session_info->msg_mask = NULL; diag_event_mask_free(session_info->event_mask); kfree(session_info->event_mask); session_info->event_mask = NULL; kfree(session_info); session_info = NULL; driver->md_session_map[i] = NULL; } } mutex_destroy(&driver->md_session_lock); driver->md_session_mask = 0; driver->md_session_mode = DIAG_MD_NONE; } int diag_md_session_create(int mode, int peripheral_mask, int proc) { int i; int err = 0; struct diag_md_session_t *new_session = NULL; /* * If there is any session running in Normal mode * we cannot start a new session . If there is a * session running in Peripheral mode we cannot * start a new session in NORMAL mode. If a session is * running with a peripheral mask and a new session * request comes in with same peripheral mask value * then return invalid param */ if (driver->md_session_mode == DIAG_MD_NORMAL) return -EINVAL; if (driver->md_session_mode == DIAG_MD_PERIPHERAL && mode == DIAG_MD_NORMAL) return -EINVAL; if (driver->md_session_mode == DIAG_MD_PERIPHERAL && (driver->md_session_mask & peripheral_mask) != 0) return -EINVAL; mutex_lock(&driver->md_session_lock); new_session = kzalloc(sizeof(struct diag_md_session_t), GFP_KERNEL); if (!new_session) { mutex_unlock(&driver->md_session_lock); return -ENOMEM; } new_session->peripheral_mask = 0; new_session->pid = current->tgid; new_session->task = current; if (mode == DIAG_MD_NORMAL) { new_session->log_mask = &log_mask; new_session->event_mask = &event_mask; new_session->msg_mask = &msg_mask; for (i = 0; i < NUM_MD_SESSIONS; i++) { if (driver->md_session_map[i] != NULL) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "another instance present for %d\n", i); err = -EEXIST; goto fail_normal; } new_session->peripheral_mask |= MD_PERIPHERAL_MASK(i); driver->md_session_mask |= MD_PERIPHERAL_MASK(i); driver->md_session_map[i] = new_session; } driver->md_session_mode = DIAG_MD_NORMAL; setup_timer(&new_session->hdlc_reset_timer, diag_md_hdlc_reset_timer_func, new_session->pid); DIAG_LOG(DIAG_DEBUG_USERSPACE, "created session in normal mode\n"); mutex_unlock(&driver->md_session_lock); return 0; } new_session->log_mask = kzalloc(sizeof(struct diag_mask_info), GFP_KERNEL); if (!new_session->log_mask) { err = -ENOMEM; goto fail_peripheral; } new_session->event_mask = kzalloc(sizeof(struct diag_mask_info), GFP_KERNEL); if (!new_session->event_mask) { err = -ENOMEM; goto fail_peripheral; } new_session->msg_mask = kzalloc(sizeof(struct diag_mask_info), GFP_KERNEL); if (!new_session->msg_mask) { err = -ENOMEM; goto fail_peripheral; } err = diag_log_mask_copy(new_session->log_mask, &log_mask); if (err) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "return value of log copy. err %d\n", err); goto fail_peripheral; } err = diag_event_mask_copy(new_session->event_mask, &event_mask); if (err) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "return value of event copy. err %d\n", err); goto fail_peripheral; } err = diag_msg_mask_copy(new_session->msg_mask, &msg_mask); if (err) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "return value of msg copy. err %d\n", err); goto fail_peripheral; } for (i = 0; i < NUM_MD_SESSIONS; i++) { if ((MD_PERIPHERAL_MASK(i) & peripheral_mask) == 0) continue; if (driver->md_session_map[i] != NULL) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "another instance present for %d\n", i); err = -EEXIST; goto fail_peripheral; } new_session->peripheral_mask |= MD_PERIPHERAL_MASK(i); driver->md_session_map[i] = new_session; driver->md_session_mask |= MD_PERIPHERAL_MASK(i); setup_timer(&new_session->hdlc_reset_timer, diag_md_hdlc_reset_timer_func, new_session->pid); } driver->md_session_mode = DIAG_MD_PERIPHERAL; mutex_unlock(&driver->md_session_lock); DIAG_LOG(DIAG_DEBUG_USERSPACE, "created session in peripheral mode\n"); return 0; fail_peripheral: diag_log_mask_free(new_session->log_mask); kfree(new_session->log_mask); new_session->log_mask = NULL; diag_event_mask_free(new_session->event_mask); kfree(new_session->event_mask); new_session->event_mask = NULL; diag_msg_mask_free(new_session->msg_mask); kfree(new_session->msg_mask); new_session->msg_mask = NULL; fail_normal: kfree(new_session); new_session = NULL; mutex_unlock(&driver->md_session_lock); return err; } static void diag_md_session_close(struct diag_md_session_t *session_info) { int i; uint8_t found = 0; if (!session_info) return; mutex_lock(&driver->md_session_lock); for (i = 0; i < NUM_MD_SESSIONS; i++) { if (driver->md_session_map[i] != session_info) continue; driver->md_session_map[i] = NULL; driver->md_session_mask &= ~session_info->peripheral_mask; if (driver->md_session_mode == DIAG_MD_NORMAL) continue; diag_log_mask_free(session_info->log_mask); kfree(session_info->log_mask); session_info->log_mask = NULL; diag_msg_mask_free(session_info->msg_mask); kfree(session_info->msg_mask); session_info->msg_mask = NULL; diag_event_mask_free(session_info->event_mask); kfree(session_info->event_mask); session_info->event_mask = NULL; del_timer(&session_info->hdlc_reset_timer); } for (i = 0; i < NUM_MD_SESSIONS && !found; i++) { if (driver->md_session_map[i] != NULL) found = 1; } driver->md_session_mode = (found) ? DIAG_MD_PERIPHERAL : DIAG_MD_NONE; kfree(session_info); session_info = NULL; mutex_unlock(&driver->md_session_lock); DIAG_LOG(DIAG_DEBUG_USERSPACE, "cleared up session\n"); } struct diag_md_session_t *diag_md_session_get_pid(int pid) { int i; for (i = 0; i < NUM_MD_SESSIONS; i++) { if (driver->md_session_map[i] && driver->md_session_map[i]->pid == pid) return driver->md_session_map[i]; } return NULL; } struct diag_md_session_t *diag_md_session_get_peripheral(uint8_t peripheral) { if (peripheral >= NUM_MD_SESSIONS) return NULL; return driver->md_session_map[peripheral]; } static int diag_md_session_check(int curr_mode, int req_mode, const struct diag_logging_mode_param_t *param, uint8_t *change_mode) { int err = 0; if (!param || !change_mode) return -EIO; *change_mode = 1; switch (curr_mode) { case DIAG_USB_MODE: case DIAG_MEMORY_DEVICE_MODE: break; default: return -EINVAL; } switch (req_mode) { case DIAG_USB_MODE: case DIAG_MEMORY_DEVICE_MODE: break; default: return -EINVAL; } if (curr_mode == DIAG_USB_MODE) { if (req_mode == DIAG_USB_MODE) { /* * This case tries to change from USB mode to USB mode. * There is no change required. Return success. */ *change_mode = 0; return 0; } /* * If there is no other mdlog process, return success. * Check if the peripheral interested in is active. */ if (param->mode_param == DIAG_MD_NORMAL) { err = diag_md_session_create(DIAG_MD_NORMAL, 0, DIAG_LOCAL_PROC); return err; } else if (param->mode_param == DIAG_MD_PERIPHERAL && (!(driver->md_session_mask & param->peripheral_mask))) { err = diag_md_session_create(DIAG_MD_PERIPHERAL, param->peripheral_mask, DIAG_LOCAL_PROC); return err; } DIAG_LOG(DIAG_DEBUG_USERSPACE, "an instance of mdlog is active\n"); *change_mode = 0; return -EINVAL; } else if (curr_mode == DIAG_MEMORY_DEVICE_MODE) { if (req_mode == DIAG_USB_MODE) { if (driver->md_session_mask != 0 && driver->md_session_mode == DIAG_MD_PERIPHERAL) { /* * An instance of mdlog is still running, Return * error. */ DIAG_LOG(DIAG_DEBUG_USERSPACE, "another instance running\n"); *change_mode = 0; return -EINVAL; } else return 0; } if (param->mode_param == DIAG_MD_NORMAL) { /* * The new client is asking for MD_NORMAL. We're * already in memory device mode - this must be * set by another active process. Return error * for this new client. */ DIAG_LOG(DIAG_DEBUG_USERSPACE, "unable to switch logging mode\n"); *change_mode = 0; return -EINVAL; } else if (param->mode_param == DIAG_MD_PERIPHERAL) { if (driver->md_session_mask & param->peripheral_mask) { /* * The new client is asking for a * specific peripheral. This case checks * if a client is exercising this * peripheral already. Return error * if the peripheral is already in use. */ DIAG_LOG(DIAG_DEBUG_USERSPACE, "another instance running\n"); *change_mode = 0; return -EINVAL; } err = diag_md_session_create(DIAG_MD_PERIPHERAL, param->peripheral_mask, DIAG_LOCAL_PROC); *change_mode = 0; return err; } } return -EINVAL; } static uint32_t diag_translate_mask(uint32_t peripheral_mask) { uint32_t ret = 0; if (peripheral_mask & DIAG_CON_APSS) ret |= (1 << APPS_DATA); if (peripheral_mask & DIAG_CON_MPSS) ret |= (1 << PERIPHERAL_MODEM); if (peripheral_mask & DIAG_CON_LPASS) ret |= (1 << PERIPHERAL_LPASS); if (peripheral_mask & DIAG_CON_WCNSS) ret |= (1 << PERIPHERAL_WCNSS); if (peripheral_mask & DIAG_CON_SENSORS) ret |= (1 << PERIPHERAL_SENSORS); return ret; } static int diag_switch_logging(struct diag_logging_mode_param_t *param) { int new_mode; int curr_mode; int err = 0; uint8_t do_switch = 1; uint32_t peripheral_mask = 0; if (!param) return -EINVAL; if (param->mode_param == DIAG_MD_PERIPHERAL && param->peripheral_mask == 0) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "asking for peripehral mode with no mask being set\n"); return -EINVAL; } if (param->mode_param == DIAG_MD_PERIPHERAL) { peripheral_mask = diag_translate_mask(param->peripheral_mask); param->peripheral_mask = peripheral_mask; } switch (param->req_mode) { case CALLBACK_MODE: case UART_MODE: case SOCKET_MODE: case MEMORY_DEVICE_MODE: new_mode = DIAG_MEMORY_DEVICE_MODE; break; case USB_MODE: new_mode = DIAG_USB_MODE; break; default: pr_err("diag: In %s, request to switch to invalid mode: %d\n", __func__, param->req_mode); return -EINVAL; } curr_mode = driver->logging_mode; DIAG_LOG(DIAG_DEBUG_USERSPACE, "request to switch logging from: %d to %d\n", curr_mode, new_mode); err = diag_md_session_check(curr_mode, new_mode, param, &do_switch); if (err) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "err from diag_md_session_check, err: %d\n", err); return err; } if (do_switch == 0) { DIAG_LOG(DIAG_DEBUG_USERSPACE, "not switching modes c: %d n: %d\n", curr_mode, new_mode); return 0; } diag_ws_reset(DIAG_WS_MUX); err = diag_mux_switch_logging(new_mode); if (err) { pr_err("diag: In %s, unable to switch mode from %d to %d, err: %d\n", __func__, curr_mode, new_mode, err); driver->logging_mode = curr_mode; goto fail; } driver->logging_mode = new_mode; if (new_mode != DIAG_MEMORY_DEVICE_MODE) { diag_update_real_time_vote(DIAG_PROC_MEMORY_DEVICE, MODE_REALTIME, ALL_PROC); } else { diag_update_proc_vote(DIAG_PROC_MEMORY_DEVICE, VOTE_UP, ALL_PROC); } if (!(new_mode == DIAG_MEMORY_DEVICE_MODE && curr_mode == DIAG_USB_MODE)) { queue_work(driver->diag_real_time_wq, &driver->diag_real_time_work); } return 0; fail: return err; } static int diag_ioctl_dci_reg(unsigned long ioarg) { int result = -EINVAL; struct diag_dci_reg_tbl_t dci_reg_params; if (copy_from_user(&dci_reg_params, (void __user *)ioarg, sizeof(struct diag_dci_reg_tbl_t))) return -EFAULT; result = diag_dci_register_client(&dci_reg_params); return result; } static int diag_ioctl_dci_health_stats(unsigned long ioarg) { int result = -EINVAL; struct diag_dci_health_stats_proc stats; if (copy_from_user(&stats, (void __user *)ioarg, sizeof(struct diag_dci_health_stats_proc))) return -EFAULT; result = diag_dci_copy_health_stats(&stats); if (result == DIAG_DCI_NO_ERROR) { if (copy_to_user((void __user *)ioarg, &stats, sizeof(struct diag_dci_health_stats_proc))) return -EFAULT; } return result; } static int diag_ioctl_dci_log_status(unsigned long ioarg) { struct diag_log_event_stats le_stats; struct diag_dci_client_tbl *dci_client = NULL; if (copy_from_user(&le_stats, (void __user *)ioarg, sizeof(struct diag_log_event_stats))) return -EFAULT; dci_client = diag_dci_get_client_entry(le_stats.client_id); if (!dci_client) return DIAG_DCI_NOT_SUPPORTED; le_stats.is_set = diag_dci_query_log_mask(dci_client, le_stats.code); if (copy_to_user((void __user *)ioarg, &le_stats, sizeof(struct diag_log_event_stats))) return -EFAULT; return DIAG_DCI_NO_ERROR; } static int diag_ioctl_dci_event_status(unsigned long ioarg) { struct diag_log_event_stats le_stats; struct diag_dci_client_tbl *dci_client = NULL; if (copy_from_user(&le_stats, (void __user *)ioarg, sizeof(struct diag_log_event_stats))) return -EFAULT; dci_client = diag_dci_get_client_entry(le_stats.client_id); if (!dci_client) return DIAG_DCI_NOT_SUPPORTED; le_stats.is_set = diag_dci_query_event_mask(dci_client, le_stats.code); if (copy_to_user((void __user *)ioarg, &le_stats, sizeof(struct diag_log_event_stats))) return -EFAULT; return DIAG_DCI_NO_ERROR; } static int diag_ioctl_lsm_deinit(void) { int i; for (i = 0; i < driver->num_clients; i++) if (driver->client_map[i].pid == current->tgid) break; if (i == driver->num_clients) return -EINVAL; driver->data_ready[i] |= DEINIT_TYPE; wake_up_interruptible(&driver->wait_q); return 1; } static int diag_ioctl_vote_real_time(unsigned long ioarg) { int real_time = 0; int temp_proc = ALL_PROC; struct real_time_vote_t vote; struct diag_dci_client_tbl *dci_client = NULL; if (copy_from_user(&vote, (void __user *)ioarg, sizeof(struct real_time_vote_t))) return -EFAULT; if (vote.proc > DIAG_PROC_MEMORY_DEVICE || vote.real_time_vote > MODE_UNKNOWN || vote.client_id < 0) { pr_err("diag: %s, invalid params, proc: %d, vote: %d, client_id: %d\n", __func__, vote.proc, vote.real_time_vote, vote.client_id); return -EINVAL; } driver->real_time_update_busy++; if (vote.proc == DIAG_PROC_DCI) { dci_client = diag_dci_get_client_entry(vote.client_id); if (!dci_client) { driver->real_time_update_busy--; return DIAG_DCI_NOT_SUPPORTED; } diag_dci_set_real_time(dci_client, vote.real_time_vote); real_time = diag_dci_get_cumulative_real_time( dci_client->client_info.token); diag_update_real_time_vote(vote.proc, real_time, dci_client->client_info.token); } else { real_time = vote.real_time_vote; temp_proc = vote.client_id; diag_update_real_time_vote(vote.proc, real_time, temp_proc); } queue_work(driver->diag_real_time_wq, &driver->diag_real_time_work); return 0; } static int diag_ioctl_get_real_time(unsigned long ioarg) { int i; int retry_count = 0; int timer = 0; struct real_time_query_t rt_query; if (copy_from_user(&rt_query, (void __user *)ioarg, sizeof(struct real_time_query_t))) return -EFAULT; while (retry_count < 3) { if (driver->real_time_update_busy > 0) { retry_count++; /* * The value 10000 was chosen empirically as an * optimum value in order to give the work in * diag_real_time_wq to complete processing. */ for (timer = 0; timer < 5; timer++) usleep_range(10000, 10100); } else { break; } } if (driver->real_time_update_busy > 0) return -EAGAIN; if (rt_query.proc < 0 || rt_query.proc >= DIAG_NUM_PROC) { pr_err("diag: Invalid proc %d in %s\n", rt_query.proc, __func__); return -EINVAL; } rt_query.real_time = driver->real_time_mode[rt_query.proc]; /* * For the local processor, if any of the peripherals is in buffering * mode, overwrite the value of real time with UNKNOWN_MODE */ if (rt_query.proc == DIAG_LOCAL_PROC) { for (i = 0; i < NUM_PERIPHERALS; i++) { if (!driver->feature[i].peripheral_buffering) continue; switch (driver->buffering_mode[i].mode) { case DIAG_BUFFERING_MODE_CIRCULAR: case DIAG_BUFFERING_MODE_THRESHOLD: rt_query.real_time = MODE_UNKNOWN; break; } } } if (copy_to_user((void __user *)ioarg, &rt_query, sizeof(struct real_time_query_t))) return -EFAULT; return 0; } static int diag_ioctl_set_buffering_mode(unsigned long ioarg) { struct diag_buffering_mode_t params; if (copy_from_user(¶ms, (void __user *)ioarg, sizeof(params))) return -EFAULT; if (params.peripheral >= NUM_PERIPHERALS) return -EINVAL; mutex_lock(&driver->mode_lock); driver->buffering_flag[params.peripheral] = 1; mutex_unlock(&driver->mode_lock); return diag_send_peripheral_buffering_mode(¶ms); } static int diag_ioctl_peripheral_drain_immediate(unsigned long ioarg) { uint8_t peripheral; if (copy_from_user(&peripheral, (void __user *)ioarg, sizeof(uint8_t))) return -EFAULT; if (peripheral >= NUM_PERIPHERALS) { pr_err("diag: In %s, invalid peripheral %d\n", __func__, peripheral); return -EINVAL; } if (!driver->feature[peripheral].peripheral_buffering) { pr_err("diag: In %s, peripheral %d doesn't support buffering\n", __func__, peripheral); return -EIO; } return diag_send_peripheral_drain_immediate(peripheral); } static int diag_ioctl_dci_support(unsigned long ioarg) { struct diag_dci_peripherals_t dci_support; int result = -EINVAL; if (copy_from_user(&dci_support, (void __user *)ioarg, sizeof(struct diag_dci_peripherals_t))) return -EFAULT; result = diag_dci_get_support_list(&dci_support); if (result == DIAG_DCI_NO_ERROR) if (copy_to_user((void __user *)ioarg, &dci_support, sizeof(struct diag_dci_peripherals_t))) return -EFAULT; return result; } static int diag_ioctl_hdlc_toggle(unsigned long ioarg) { uint8_t hdlc_support; struct diag_md_session_t *session_info = NULL; session_info = diag_md_session_get_pid(current->tgid); if (copy_from_user(&hdlc_support, (void __user *)ioarg, sizeof(uint8_t))) return -EFAULT; mutex_lock(&driver->hdlc_disable_mutex); if (session_info) { mutex_lock(&driver->md_session_lock); session_info->hdlc_disabled = hdlc_support; mutex_unlock(&driver->md_session_lock); } else driver->hdlc_disabled = hdlc_support; mutex_unlock(&driver->hdlc_disable_mutex); diag_update_md_clients(HDLC_SUPPORT_TYPE); return 0; } static int diag_ioctl_register_callback(unsigned long ioarg) { int err = 0; struct diag_callback_reg_t reg; if (copy_from_user(®, (void __user *)ioarg, sizeof(struct diag_callback_reg_t))) { return -EFAULT; } if (reg.proc < 0 || reg.proc >= DIAG_NUM_PROC) { pr_err("diag: In %s, invalid proc %d for callback registration\n", __func__, reg.proc); return -EINVAL; } if (driver->md_session_mode == DIAG_MD_NORMAL || driver->md_session_mode == DIAG_MD_PERIPHERAL) { return -EIO; } return err; } static int diag_cmd_register_tbl(struct diag_cmd_reg_tbl_t *reg_tbl) { int i; int err = 0; uint32_t count = 0; struct diag_cmd_reg_entry_t *entries = NULL; const uint16_t entry_len = sizeof(struct diag_cmd_reg_entry_t); if (!reg_tbl) { pr_err("diag: In %s, invalid registration table\n", __func__); return -EINVAL; } count = reg_tbl->count; if ((UINT_MAX / entry_len) < count) { pr_warn("diag: In %s, possbile integer overflow.\n", __func__); return -EFAULT; } entries = kzalloc(count * entry_len, GFP_KERNEL); if (!entries) { pr_err("diag: In %s, unable to create memory for registration table entries\n", __func__); return -ENOMEM; } err = copy_from_user(entries, reg_tbl->entries, count * entry_len); if (err) { pr_err("diag: In %s, error copying data from userspace, err: %d\n", __func__, err); kfree(entries); return -EFAULT; } for (i = 0; i < count; i++) { err = diag_cmd_add_reg(&entries[i], APPS_DATA, current->tgid); if (err) { pr_err("diag: In %s, unable to register command, err: %d\n", __func__, err); break; } } kfree(entries); return err; } static int diag_ioctl_cmd_reg(unsigned long ioarg) { struct diag_cmd_reg_tbl_t reg_tbl; if (copy_from_user(®_tbl, (void __user *)ioarg, sizeof(struct diag_cmd_reg_tbl_t))) { return -EFAULT; } return diag_cmd_register_tbl(®_tbl); } static int diag_ioctl_cmd_dereg(void) { diag_cmd_remove_reg_by_pid(current->tgid); return 0; } #ifdef CONFIG_COMPAT /* * @sync_obj_name: name of the synchronization object associated with this proc * @count: number of entries in the bind * @params: the actual packet registrations */ struct diag_cmd_reg_tbl_compat_t { char sync_obj_name[MAX_SYNC_OBJ_NAME_SIZE]; uint32_t count; compat_uptr_t entries; }; static int diag_ioctl_cmd_reg_compat(unsigned long ioarg) { struct diag_cmd_reg_tbl_compat_t reg_tbl_compat; struct diag_cmd_reg_tbl_t reg_tbl; if (copy_from_user(®_tbl_compat, (void __user *)ioarg, sizeof(struct diag_cmd_reg_tbl_compat_t))) { return -EFAULT; } strlcpy(reg_tbl.sync_obj_name, reg_tbl_compat.sync_obj_name, MAX_SYNC_OBJ_NAME_SIZE); reg_tbl.count = reg_tbl_compat.count; reg_tbl.entries = (struct diag_cmd_reg_entry_t *) (uintptr_t)reg_tbl_compat.entries; return diag_cmd_register_tbl(®_tbl); } long diagchar_compat_ioctl(struct file *filp, unsigned int iocmd, unsigned long ioarg) { int result = -EINVAL; int client_id = 0; uint16_t delayed_rsp_id = 0; uint16_t remote_dev; struct diag_dci_client_tbl *dci_client = NULL; struct diag_logging_mode_param_t mode_param; switch (iocmd) { case DIAG_IOCTL_COMMAND_REG: result = diag_ioctl_cmd_reg_compat(ioarg); break; case DIAG_IOCTL_COMMAND_DEREG: result = diag_ioctl_cmd_dereg(); break; case DIAG_IOCTL_GET_DELAYED_RSP_ID: delayed_rsp_id = diag_get_next_delayed_rsp_id(); if (copy_to_user((void __user *)ioarg, &delayed_rsp_id, sizeof(uint16_t))) result = -EFAULT; else result = 0; break; case DIAG_IOCTL_DCI_REG: result = diag_ioctl_dci_reg(ioarg); break; case DIAG_IOCTL_DCI_DEINIT: if (copy_from_user((void *)&client_id, (void __user *)ioarg, sizeof(int))) return -EFAULT; dci_client = diag_dci_get_client_entry(client_id); if (!dci_client) return DIAG_DCI_NOT_SUPPORTED; result = diag_dci_deinit_client(dci_client); break; case DIAG_IOCTL_DCI_SUPPORT: result = diag_ioctl_dci_support(ioarg); break; case DIAG_IOCTL_DCI_HEALTH_STATS: result = diag_ioctl_dci_health_stats(ioarg); break; case DIAG_IOCTL_DCI_LOG_STATUS: result = diag_ioctl_dci_log_status(ioarg); break; case DIAG_IOCTL_DCI_EVENT_STATUS: result = diag_ioctl_dci_event_status(ioarg); break; case DIAG_IOCTL_DCI_CLEAR_LOGS: if (copy_from_user((void *)&client_id, (void __user *)ioarg, sizeof(int))) return -EFAULT; result = diag_dci_clear_log_mask(client_id); break; case DIAG_IOCTL_DCI_CLEAR_EVENTS: if (copy_from_user(&client_id, (void __user *)ioarg, sizeof(int))) return -EFAULT; result = diag_dci_clear_event_mask(client_id); break; case DIAG_IOCTL_LSM_DEINIT: result = diag_ioctl_lsm_deinit(); break; case DIAG_IOCTL_SWITCH_LOGGING: if (copy_from_user((void *)&mode_param, (void __user *)ioarg, sizeof(mode_param))) return -EFAULT; mutex_lock(&driver->diagchar_mutex); result = diag_switch_logging(&mode_param); mutex_unlock(&driver->diagchar_mutex); break; case DIAG_IOCTL_REMOTE_DEV: remote_dev = diag_get_remote_device_mask(); if (copy_to_user((void __user *)ioarg, &remote_dev, sizeof(uint16_t))) result = -EFAULT; else result = 1; break; case DIAG_IOCTL_VOTE_REAL_TIME: result = diag_ioctl_vote_real_time(ioarg); break; case DIAG_IOCTL_GET_REAL_TIME: result = diag_ioctl_get_real_time(ioarg); break; case DIAG_IOCTL_PERIPHERAL_BUF_CONFIG: result = diag_ioctl_set_buffering_mode(ioarg); break; case DIAG_IOCTL_PERIPHERAL_BUF_DRAIN: result = diag_ioctl_peripheral_drain_immediate(ioarg); break; case DIAG_IOCTL_REGISTER_CALLBACK: result = diag_ioctl_register_callback(ioarg); break; case DIAG_IOCTL_HDLC_TOGGLE: result = diag_ioctl_hdlc_toggle(ioarg); break; } return result; } #endif long diagchar_ioctl(struct file *filp, unsigned int iocmd, unsigned long ioarg) { int result = -EINVAL; int client_id = 0; uint16_t delayed_rsp_id; uint16_t remote_dev; struct diag_dci_client_tbl *dci_client = NULL; struct diag_logging_mode_param_t mode_param; switch (iocmd) { case DIAG_IOCTL_COMMAND_REG: result = diag_ioctl_cmd_reg(ioarg); break; case DIAG_IOCTL_COMMAND_DEREG: result = diag_ioctl_cmd_dereg(); break; case DIAG_IOCTL_GET_DELAYED_RSP_ID: delayed_rsp_id = diag_get_next_delayed_rsp_id(); if (copy_to_user((void __user *)ioarg, &delayed_rsp_id, sizeof(uint16_t))) result = -EFAULT; else result = 0; break; case DIAG_IOCTL_DCI_REG: result = diag_ioctl_dci_reg(ioarg); break; case DIAG_IOCTL_DCI_DEINIT: if (copy_from_user((void *)&client_id, (void __user *)ioarg, sizeof(int))) return -EFAULT; dci_client = diag_dci_get_client_entry(client_id); if (!dci_client) return DIAG_DCI_NOT_SUPPORTED; result = diag_dci_deinit_client(dci_client); break; case DIAG_IOCTL_DCI_SUPPORT: result = diag_ioctl_dci_support(ioarg); break; case DIAG_IOCTL_DCI_HEALTH_STATS: result = diag_ioctl_dci_health_stats(ioarg); break; case DIAG_IOCTL_DCI_LOG_STATUS: result = diag_ioctl_dci_log_status(ioarg); break; case DIAG_IOCTL_DCI_EVENT_STATUS: result = diag_ioctl_dci_event_status(ioarg); break; case DIAG_IOCTL_DCI_CLEAR_LOGS: if (copy_from_user((void *)&client_id, (void __user *)ioarg, sizeof(int))) return -EFAULT; result = diag_dci_clear_log_mask(client_id); break; case DIAG_IOCTL_DCI_CLEAR_EVENTS: if (copy_from_user(&client_id, (void __user *)ioarg, sizeof(int))) return -EFAULT; result = diag_dci_clear_event_mask(client_id); break; case DIAG_IOCTL_LSM_DEINIT: result = diag_ioctl_lsm_deinit(); break; case DIAG_IOCTL_SWITCH_LOGGING: if (copy_from_user((void *)&mode_param, (void __user *)ioarg, sizeof(mode_param))) return -EFAULT; mutex_lock(&driver->diagchar_mutex); result = diag_switch_logging(&mode_param); mutex_unlock(&driver->diagchar_mutex); break; case DIAG_IOCTL_REMOTE_DEV: remote_dev = diag_get_remote_device_mask(); if (copy_to_user((void __user *)ioarg, &remote_dev, sizeof(uint16_t))) result = -EFAULT; else result = 1; break; case DIAG_IOCTL_VOTE_REAL_TIME: result = diag_ioctl_vote_real_time(ioarg); break; case DIAG_IOCTL_GET_REAL_TIME: result = diag_ioctl_get_real_time(ioarg); break; case DIAG_IOCTL_PERIPHERAL_BUF_CONFIG: result = diag_ioctl_set_buffering_mode(ioarg); break; case DIAG_IOCTL_PERIPHERAL_BUF_DRAIN: result = diag_ioctl_peripheral_drain_immediate(ioarg); break; case DIAG_IOCTL_REGISTER_CALLBACK: result = diag_ioctl_register_callback(ioarg); break; case DIAG_IOCTL_HDLC_TOGGLE: result = diag_ioctl_hdlc_toggle(ioarg); break; } return result; } static int diag_process_apps_data_hdlc(unsigned char *buf, int len, int pkt_type) { int err = 0; int ret = PKT_DROP; struct diag_apps_data_t *data = &hdlc_data; struct diag_send_desc_type send = { NULL, NULL, DIAG_STATE_START, 0 }; struct diag_hdlc_dest_type enc = { NULL, NULL, 0 }; /* * The maximum encoded size of the buffer can be atmost twice the length * of the packet. Add three bytes foe footer - 16 bit CRC (2 bytes) + * delimiter (1 byte). */ const uint32_t max_encoded_size = ((2 * len) + 3); if (!buf || len <= 0) { pr_err("diag: In %s, invalid buf: %p len: %d\n", __func__, buf, len); return -EIO; } if (DIAG_MAX_HDLC_BUF_SIZE < max_encoded_size) { pr_err_ratelimited("diag: In %s, encoded data is larger %d than the buffer size %d\n", __func__, max_encoded_size, DIAG_MAX_HDLC_BUF_SIZE); return -EBADMSG; } send.state = DIAG_STATE_START; send.pkt = buf; send.last = (void *)(buf + len - 1); send.terminate = 1; if (!data->buf) data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + APF_DIAG_PADDING, POOL_TYPE_HDLC); if (!data->buf) { ret = PKT_DROP; goto fail_ret; } if ((DIAG_MAX_HDLC_BUF_SIZE - data->len) <= max_encoded_size) { err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, data->ctxt); if (err) { ret = -EIO; goto fail_free_buf; } data->buf = NULL; data->len = 0; data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + APF_DIAG_PADDING, POOL_TYPE_HDLC); if (!data->buf) { ret = PKT_DROP; goto fail_ret; } } enc.dest = data->buf + data->len; enc.dest_last = (void *)(data->buf + data->len + max_encoded_size); diag_hdlc_encode(&send, &enc); /* * This is to check if after HDLC encoding, we are still within * the limits of aggregation buffer. If not, we write out the * current buffer and start aggregation in a newly allocated * buffer. */ if ((uintptr_t)enc.dest >= (uintptr_t)(data->buf + DIAG_MAX_HDLC_BUF_SIZE)) { err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, data->ctxt); if (err) { ret = -EIO; goto fail_free_buf; } data->buf = NULL; data->len = 0; data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + APF_DIAG_PADDING, POOL_TYPE_HDLC); if (!data->buf) { ret = PKT_DROP; goto fail_ret; } enc.dest = data->buf + data->len; enc.dest_last = (void *)(data->buf + data->len + max_encoded_size); diag_hdlc_encode(&send, &enc); } data->len = (((uintptr_t)enc.dest - (uintptr_t)data->buf) < DIAG_MAX_HDLC_BUF_SIZE) ? ((uintptr_t)enc.dest - (uintptr_t)data->buf) : DIAG_MAX_HDLC_BUF_SIZE; if (pkt_type == DATA_TYPE_RESPONSE) { err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, data->ctxt); if (err) { ret = -EIO; goto fail_free_buf; } data->buf = NULL; data->len = 0; } return PKT_ALLOC; fail_free_buf: diagmem_free(driver, data->buf, POOL_TYPE_HDLC); data->buf = NULL; data->len = 0; fail_ret: return ret; } static int diag_process_apps_data_non_hdlc(unsigned char *buf, int len, int pkt_type) { int err = 0; int ret = PKT_DROP; struct diag_pkt_frame_t header; struct diag_apps_data_t *data = &non_hdlc_data; /* * The maximum packet size, when the data is non hdlc encoded is equal * to the size of the packet frame header and the length. Add 1 for the * delimiter 0x7E at the end. */ const uint32_t max_pkt_size = sizeof(header) + len + 1; if (!buf || len <= 0) { pr_err("diag: In %s, invalid buf: %p len: %d\n", __func__, buf, len); return -EIO; } if (!data->buf) { data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + APF_DIAG_PADDING, POOL_TYPE_HDLC); if (!data->buf) { ret = PKT_DROP; goto fail_ret; } } if ((DIAG_MAX_HDLC_BUF_SIZE - data->len) <= max_pkt_size) { err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, data->ctxt); if (err) { ret = -EIO; goto fail_free_buf; } data->buf = NULL; data->len = 0; data->buf = diagmem_alloc(driver, DIAG_MAX_HDLC_BUF_SIZE + APF_DIAG_PADDING, POOL_TYPE_HDLC); if (!data->buf) { ret = PKT_DROP; goto fail_ret; } } header.start = CONTROL_CHAR; header.version = 1; header.length = len; memcpy(data->buf + data->len, &header, sizeof(header)); data->len += sizeof(header); memcpy(data->buf + data->len, buf, len); data->len += len; *(uint8_t *)(data->buf + data->len) = CONTROL_CHAR; data->len += sizeof(uint8_t); if (pkt_type == DATA_TYPE_RESPONSE) { err = diag_mux_write(DIAG_LOCAL_PROC, data->buf, data->len, data->ctxt); if (err) { ret = -EIO; goto fail_free_buf; } data->buf = NULL; data->len = 0; } return PKT_ALLOC; fail_free_buf: diagmem_free(driver, data->buf, POOL_TYPE_HDLC); data->buf = NULL; data->len = 0; fail_ret: return ret; } static int diag_user_process_dci_data(const char __user *buf, int len) { int err = 0; const int mempool = POOL_TYPE_USER; unsigned char *user_space_data = NULL; if (!buf || len <= 0 || len > diag_mempools[mempool].itemsize) { pr_err_ratelimited("diag: In %s, invalid buf %p len: %d\n", __func__, buf, len); return -EBADMSG; } user_space_data = diagmem_alloc(driver, len, mempool); if (!user_space_data) return -ENOMEM; err = copy_from_user(user_space_data, buf, len); if (err) { pr_err_ratelimited("diag: In %s, unable to copy data from userspace, err: %d\n", __func__, err); err = DIAG_DCI_SEND_DATA_FAIL; goto fail; } err = diag_process_dci_transaction(user_space_data, len); fail: diagmem_free(driver, user_space_data, mempool); user_space_data = NULL; return err; } static int diag_user_process_dci_apps_data(const char __user *buf, int len, int pkt_type) { int err = 0; const int mempool = POOL_TYPE_COPY; unsigned char *user_space_data = NULL; if (!buf || len <= 0 || len > diag_mempools[mempool].itemsize) { pr_err_ratelimited("diag: In %s, invalid buf %p len: %d\n", __func__, buf, len); return -EBADMSG; } pkt_type &= (DCI_PKT_TYPE | DATA_TYPE_DCI_LOG | DATA_TYPE_DCI_EVENT); if (!pkt_type) { pr_err_ratelimited("diag: In %s, invalid pkt_type: %d\n", __func__, pkt_type); return -EBADMSG; } user_space_data = diagmem_alloc(driver, len, mempool); if (!user_space_data) return -ENOMEM; err = copy_from_user(user_space_data, buf, len); if (err) { pr_alert("diag: In %s, unable to copy data from userspace, err: %d\n", __func__, err); goto fail; } diag_process_apps_dci_read_data(pkt_type, user_space_data, len); fail: diagmem_free(driver, user_space_data, mempool); user_space_data = NULL; return err; } static int diag_user_process_raw_data(const char __user *buf, int len) { int err = 0; int ret = 0; int token_offset = 0; int remote_proc = 0; const int mempool = POOL_TYPE_COPY; unsigned char *user_space_data = NULL; struct diag_md_session_t *info = NULL; if (!buf || len <= 0 || len > CALLBACK_BUF_SIZE) { pr_err_ratelimited("diag: In %s, invalid buf %p len: %d\n", __func__, buf, len); return -EBADMSG; } user_space_data = diagmem_alloc(driver, len, mempool); if (!user_space_data) return -ENOMEM; err = copy_from_user(user_space_data, buf, len); if (err) { pr_err("diag: copy failed for user space data\n"); goto fail; } /* Check for proc_type */ remote_proc = diag_get_remote(*(int *)user_space_data); if (remote_proc) { token_offset = sizeof(int); if (len <= MIN_SIZ_ALLOW) { pr_err("diag: In %s, possible integer underflow, payload size: %d\n", __func__, len); diagmem_free(driver, user_space_data, mempool); user_space_data = NULL; return -EBADMSG; } len -= sizeof(int); } if (driver->mask_check) { if (!mask_request_validate(user_space_data + token_offset)) { pr_alert("diag: mask request Invalid\n"); diagmem_free(driver, user_space_data, mempool); user_space_data = NULL; return -EFAULT; } } if (remote_proc) { ret = diag_send_raw_data_remote(remote_proc - 1, (void *)(user_space_data + token_offset), len, USER_SPACE_RAW_DATA); if (ret) { pr_err("diag: Error sending data to remote proc %d, err: %d\n", remote_proc, ret); } } else { wait_event_interruptible(driver->wait_q, (driver->in_busy_pktdata == 0)); info = diag_md_session_get_pid(current->tgid); ret = diag_process_apps_pkt(user_space_data, len, info); if (ret == 1) diag_send_error_rsp((void *)(user_space_data), len); } fail: diagmem_free(driver, user_space_data, mempool); user_space_data = NULL; return ret; } static int diag_user_process_userspace_data(const char __user *buf, int len) { int err = 0; int max_retries = 3; int retry_count = 0; int remote_proc = 0; int token_offset = 0; struct diag_md_session_t *session_info = NULL; uint8_t hdlc_disabled; if (!buf || len <= 0 || len > USER_SPACE_DATA) { pr_err_ratelimited("diag: In %s, invalid buf %p len: %d\n", __func__, buf, len); return -EBADMSG; } do { if (!driver->user_space_data_busy) break; retry_count++; usleep_range(10000, 10100); } while (retry_count < max_retries); if (driver->user_space_data_busy) return -EAGAIN; err = copy_from_user(driver->user_space_data_buf, buf, len); if (err) { pr_err("diag: In %s, failed to copy data from userspace, err: %d\n", __func__, err); return -EIO; } /* Check for proc_type */ remote_proc = diag_get_remote(*(int *)driver->user_space_data_buf); if (remote_proc) { if (len <= MIN_SIZ_ALLOW) { pr_err("diag: Integer underflow in %s, payload size: %d", __func__, len); return -EBADMSG; } token_offset = sizeof(int); len -= sizeof(int); } /* Check masks for On-Device logging */ if (driver->mask_check) { if (!mask_request_validate(driver->user_space_data_buf + token_offset)) { pr_alert("diag: mask request Invalid\n"); return -EFAULT; } } /* send masks to local processor now */ if (!remote_proc) { session_info = diag_md_session_get_pid(current->tgid); if (!session_info) { pr_err("diag:In %s request came from invalid md session pid:%d", __func__, current->tgid); return -EINVAL; } if (session_info) hdlc_disabled = session_info->hdlc_disabled; else hdlc_disabled = driver->hdlc_disabled; if (!hdlc_disabled) diag_process_hdlc_pkt((void *) (driver->user_space_data_buf), len, session_info); else diag_process_non_hdlc_pkt((char *) (driver->user_space_data_buf), len, session_info); return 0; } err = diag_process_userspace_remote(remote_proc, driver->user_space_data_buf + token_offset, len); if (err) { driver->user_space_data_busy = 0; pr_err("diag: Error sending mask to remote proc %d, err: %d\n", remote_proc, err); } return err; } static int diag_user_process_apps_data(const char __user *buf, int len, int pkt_type) { int ret = 0; int stm_size = 0; const int mempool = POOL_TYPE_COPY; unsigned char *user_space_data = NULL; struct diag_md_session_t *session_info = NULL; uint8_t hdlc_disabled; if (!buf || len <= 0 || len > DIAG_MAX_RSP_SIZE) { pr_err_ratelimited("diag: In %s, invalid buf %p len: %d\n", __func__, buf, len); return -EBADMSG; } switch (pkt_type) { case DATA_TYPE_EVENT: case DATA_TYPE_F3: case DATA_TYPE_LOG: case DATA_TYPE_RESPONSE: case DATA_TYPE_DELAYED_RESPONSE: break; default: pr_err_ratelimited("diag: In %s, invalid pkt_type: %d\n", __func__, pkt_type); return -EBADMSG; } user_space_data = diagmem_alloc(driver, len, mempool); if (!user_space_data) { diag_record_stats(pkt_type, PKT_DROP); return -ENOMEM; } ret = copy_from_user(user_space_data, buf, len); if (ret) { pr_alert("diag: In %s, unable to copy data from userspace, err: %d\n", __func__, ret); diagmem_free(driver, user_space_data, mempool); user_space_data = NULL; diag_record_stats(pkt_type, PKT_DROP); return -EBADMSG; } if (driver->stm_state[APPS_DATA] && (pkt_type >= DATA_TYPE_EVENT) && (pkt_type <= DATA_TYPE_LOG)) { stm_size = stm_log_inv_ts(OST_ENTITY_DIAG, 0, user_space_data, len); if (stm_size == 0) { pr_debug("diag: In %s, stm_log_inv_ts returned size of 0\n", __func__); } diagmem_free(driver, user_space_data, mempool); user_space_data = NULL; return 0; } mutex_lock(&apps_data_mutex); mutex_lock(&driver->hdlc_disable_mutex); session_info = diag_md_session_get_peripheral(APPS_DATA); if (session_info) hdlc_disabled = session_info->hdlc_disabled; else hdlc_disabled = driver->hdlc_disabled; if (hdlc_disabled) ret = diag_process_apps_data_non_hdlc(user_space_data, len, pkt_type); else ret = diag_process_apps_data_hdlc(user_space_data, len, pkt_type); mutex_unlock(&driver->hdlc_disable_mutex); mutex_unlock(&apps_data_mutex); diagmem_free(driver, user_space_data, mempool); user_space_data = NULL; check_drain_timer(); if (ret == PKT_DROP) diag_record_stats(pkt_type, PKT_DROP); else if (ret == PKT_ALLOC) diag_record_stats(pkt_type, PKT_ALLOC); else return ret; return 0; } static ssize_t diagchar_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { struct diag_dci_client_tbl *entry; struct list_head *start, *temp; int index = -1, i = 0, ret = 0; int data_type; int copy_dci_data = 0; int exit_stat = 0; int write_len = 0; struct diag_md_session_t *session_info = NULL; for (i = 0; i < driver->num_clients; i++) if (driver->client_map[i].pid == current->tgid) index = i; if (index == -1) { pr_err("diag: Client PID not found in table"); return -EINVAL; } if (!buf) { pr_err("diag: bad address from user side\n"); return -EFAULT; } wait_event_interruptible(driver->wait_q, driver->data_ready[index]); mutex_lock(&driver->diagchar_mutex); if ((driver->data_ready[index] & USER_SPACE_DATA_TYPE) && (driver->logging_mode == DIAG_MEMORY_DEVICE_MODE)) { pr_debug("diag: process woken up\n"); /*Copy the type of data being passed*/ data_type = driver->data_ready[index] & USER_SPACE_DATA_TYPE; driver->data_ready[index] ^= USER_SPACE_DATA_TYPE; COPY_USER_SPACE_OR_EXIT(buf, data_type, sizeof(int)); /* place holder for number of data field */ ret += sizeof(int); session_info = diag_md_session_get_pid(current->tgid); exit_stat = diag_md_copy_to_user(buf, &ret, count, session_info); goto exit; } else if (driver->data_ready[index] & USER_SPACE_DATA_TYPE) { /* In case, the thread wakes up and the logging mode is not memory device any more, the condition needs to be cleared */ driver->data_ready[index] ^= USER_SPACE_DATA_TYPE; } if (driver->data_ready[index] & HDLC_SUPPORT_TYPE) { data_type = driver->data_ready[index] & HDLC_SUPPORT_TYPE; driver->data_ready[index] ^= HDLC_SUPPORT_TYPE; COPY_USER_SPACE_OR_EXIT(buf, data_type, sizeof(int)); session_info = diag_md_session_get_pid(current->tgid); if (session_info) COPY_USER_SPACE_OR_EXIT(buf+4, session_info->hdlc_disabled, sizeof(uint8_t)); goto exit; } if (driver->data_ready[index] & DEINIT_TYPE) { /*Copy the type of data being passed*/ data_type = driver->data_ready[index] & DEINIT_TYPE; COPY_USER_SPACE_OR_EXIT(buf, data_type, 4); driver->data_ready[index] ^= DEINIT_TYPE; mutex_unlock(&driver->diagchar_mutex); diag_remove_client_entry(file); return ret; } if (driver->data_ready[index] & MSG_MASKS_TYPE) { /*Copy the type of data being passed*/ data_type = driver->data_ready[index] & MSG_MASKS_TYPE; session_info = diag_md_session_get_peripheral(APPS_DATA); COPY_USER_SPACE_OR_EXIT(buf, data_type, sizeof(int)); write_len = diag_copy_to_user_msg_mask(buf + ret, count, session_info); if (write_len > 0) ret += write_len; driver->data_ready[index] ^= MSG_MASKS_TYPE; goto exit; } if (driver->data_ready[index] & EVENT_MASKS_TYPE) { /*Copy the type of data being passed*/ data_type = driver->data_ready[index] & EVENT_MASKS_TYPE; session_info = diag_md_session_get_peripheral(APPS_DATA); COPY_USER_SPACE_OR_EXIT(buf, data_type, 4); if (session_info && session_info->event_mask && session_info->event_mask->ptr) { COPY_USER_SPACE_OR_EXIT(buf + sizeof(int), *(session_info->event_mask->ptr), session_info->event_mask->mask_len); } else { COPY_USER_SPACE_OR_EXIT(buf + sizeof(int), *(event_mask.ptr), event_mask.mask_len); } driver->data_ready[index] ^= EVENT_MASKS_TYPE; goto exit; } if (driver->data_ready[index] & LOG_MASKS_TYPE) { /*Copy the type of data being passed*/ data_type = driver->data_ready[index] & LOG_MASKS_TYPE; session_info = diag_md_session_get_peripheral(APPS_DATA); COPY_USER_SPACE_OR_EXIT(buf, data_type, sizeof(int)); write_len = diag_copy_to_user_log_mask(buf + ret, count, session_info); if (write_len > 0) ret += write_len; driver->data_ready[index] ^= LOG_MASKS_TYPE; goto exit; } if (driver->data_ready[index] & PKT_TYPE) { /*Copy the type of data being passed*/ data_type = driver->data_ready[index] & PKT_TYPE; COPY_USER_SPACE_OR_EXIT(buf, data_type, sizeof(data_type)); COPY_USER_SPACE_OR_EXIT(buf + sizeof(data_type), *(driver->apps_req_buf), driver->apps_req_buf_len); driver->data_ready[index] ^= PKT_TYPE; driver->in_busy_pktdata = 0; goto exit; } if (driver->data_ready[index] & DCI_PKT_TYPE) { /* Copy the type of data being passed */ data_type = driver->data_ready[index] & DCI_PKT_TYPE; COPY_USER_SPACE_OR_EXIT(buf, data_type, 4); COPY_USER_SPACE_OR_EXIT(buf+4, *(driver->dci_pkt_buf), driver->dci_pkt_length); driver->data_ready[index] ^= DCI_PKT_TYPE; driver->in_busy_dcipktdata = 0; goto exit; } if (driver->data_ready[index] & DCI_EVENT_MASKS_TYPE) { /*Copy the type of data being passed*/ data_type = driver->data_ready[index] & DCI_EVENT_MASKS_TYPE; COPY_USER_SPACE_OR_EXIT(buf, data_type, 4); COPY_USER_SPACE_OR_EXIT(buf+4, driver->num_dci_client, 4); COPY_USER_SPACE_OR_EXIT(buf + 8, (dci_ops_tbl[DCI_LOCAL_PROC]. event_mask_composite), DCI_EVENT_MASK_SIZE); driver->data_ready[index] ^= DCI_EVENT_MASKS_TYPE; goto exit; } if (driver->data_ready[index] & DCI_LOG_MASKS_TYPE) { /*Copy the type of data being passed*/ data_type = driver->data_ready[index] & DCI_LOG_MASKS_TYPE; COPY_USER_SPACE_OR_EXIT(buf, data_type, 4); COPY_USER_SPACE_OR_EXIT(buf+4, driver->num_dci_client, 4); COPY_USER_SPACE_OR_EXIT(buf+8, (dci_ops_tbl[DCI_LOCAL_PROC]. log_mask_composite), DCI_LOG_MASK_SIZE); driver->data_ready[index] ^= DCI_LOG_MASKS_TYPE; goto exit; } exit: mutex_unlock(&driver->diagchar_mutex); if (driver->data_ready[index] & DCI_DATA_TYPE) { mutex_lock(&driver->dci_mutex); /* Copy the type of data being passed */ data_type = driver->data_ready[index] & DCI_DATA_TYPE; list_for_each_safe(start, temp, &driver->dci_client_list) { entry = list_entry(start, struct diag_dci_client_tbl, track); if (entry->client->tgid != current->tgid) continue; if (!entry->in_service) continue; if (copy_to_user(buf + ret, &data_type, sizeof(int))) { mutex_unlock(&driver->dci_mutex); goto end; } ret += sizeof(int); if (copy_to_user(buf + ret, &entry->client_info.token, sizeof(int))) { mutex_unlock(&driver->dci_mutex); goto end; } ret += sizeof(int); copy_dci_data = 1; exit_stat = diag_copy_dci(buf, count, entry, &ret); mutex_lock(&driver->diagchar_mutex); driver->data_ready[index] ^= DCI_DATA_TYPE; mutex_unlock(&driver->diagchar_mutex); if (exit_stat == 1) { mutex_unlock(&driver->dci_mutex); goto end; } } mutex_unlock(&driver->dci_mutex); goto end; } end: /* * Flush any read that is currently pending on DCI data and * command channnels. This will ensure that the next read is not * missed. */ if (copy_dci_data) { diag_ws_on_copy_complete(DIAG_WS_DCI); flush_workqueue(driver->diag_dci_wq); } return ret; } static ssize_t diagchar_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { int err = 0; int pkt_type = 0; int payload_len = 0; const char __user *payload_buf = NULL; /* * The data coming from the user sapce should at least have the * packet type heeader. */ if (count < sizeof(int)) { pr_err("diag: In %s, client is sending short data, len: %d\n", __func__, (int)count); return -EBADMSG; } err = copy_from_user((&pkt_type), buf, sizeof(int)); if (err) { pr_err_ratelimited("diag: In %s, unable to copy pkt_type from userspace, err: %d\n", __func__, err); return -EIO; } if (driver->logging_mode == DIAG_USB_MODE && !driver->usb_connected) { if (!((pkt_type == DCI_DATA_TYPE) || (pkt_type == DCI_PKT_TYPE) || (pkt_type & DATA_TYPE_DCI_LOG) || (pkt_type & DATA_TYPE_DCI_EVENT))) { pr_debug("diag: In %s, Dropping non DCI packet type\n", __func__); return -EIO; } } payload_buf = buf + sizeof(int); payload_len = count - sizeof(int); if (pkt_type == DCI_PKT_TYPE) return diag_user_process_dci_apps_data(payload_buf, payload_len, pkt_type); else if (pkt_type == DCI_DATA_TYPE) return diag_user_process_dci_data(payload_buf, payload_len); else if (pkt_type == USER_SPACE_RAW_DATA_TYPE) return diag_user_process_raw_data(payload_buf, payload_len); else if (pkt_type == USER_SPACE_DATA_TYPE) return diag_user_process_userspace_data(payload_buf, payload_len); if (pkt_type & (DATA_TYPE_DCI_LOG | DATA_TYPE_DCI_EVENT)) { err = diag_user_process_dci_apps_data(payload_buf, payload_len, pkt_type); if (pkt_type & DATA_TYPE_DCI_LOG) pkt_type ^= DATA_TYPE_DCI_LOG; if (pkt_type & DATA_TYPE_DCI_EVENT) pkt_type ^= DATA_TYPE_DCI_EVENT; /* * Check if the log or event is selected even on the regular * stream. If USB is not connected and we are not in memory * device mode, we should not process these logs/events. */ if (pkt_type && driver->logging_mode == DIAG_USB_MODE && !driver->usb_connected) return err; } switch (pkt_type) { case DATA_TYPE_EVENT: case DATA_TYPE_F3: case DATA_TYPE_LOG: case DATA_TYPE_DELAYED_RESPONSE: case DATA_TYPE_RESPONSE: return diag_user_process_apps_data(payload_buf, payload_len, pkt_type); default: pr_err_ratelimited("diag: In %s, invalid pkt_type: %d\n", __func__, pkt_type); return -EINVAL; } return err; } void diag_ws_init() { driver->dci_ws.ref_count = 0; driver->dci_ws.copy_count = 0; spin_lock_init(&driver->dci_ws.lock); driver->md_ws.ref_count = 0; driver->md_ws.copy_count = 0; spin_lock_init(&driver->md_ws.lock); } static void diag_stats_init(void) { if (!driver) return; driver->msg_stats.alloc_count = 0; driver->msg_stats.drop_count = 0; driver->log_stats.alloc_count = 0; driver->log_stats.drop_count = 0; driver->event_stats.alloc_count = 0; driver->event_stats.drop_count = 0; } void diag_ws_on_notify() { /* * Do not deal with reference count here as there can be spurious * interrupts. */ pm_stay_awake(driver->diag_dev); } void diag_ws_on_read(int type, int pkt_len) { unsigned long flags; struct diag_ws_ref_t *ws_ref = NULL; switch (type) { case DIAG_WS_DCI: ws_ref = &driver->dci_ws; break; case DIAG_WS_MUX: ws_ref = &driver->md_ws; break; default: pr_err_ratelimited("diag: In %s, invalid type: %d\n", __func__, type); return; } spin_lock_irqsave(&ws_ref->lock, flags); if (pkt_len > 0) { ws_ref->ref_count++; } else { if (ws_ref->ref_count < 1) { ws_ref->ref_count = 0; ws_ref->copy_count = 0; } diag_ws_release(); } spin_unlock_irqrestore(&ws_ref->lock, flags); } void diag_ws_on_copy(int type) { unsigned long flags; struct diag_ws_ref_t *ws_ref = NULL; switch (type) { case DIAG_WS_DCI: ws_ref = &driver->dci_ws; break; case DIAG_WS_MUX: ws_ref = &driver->md_ws; break; default: pr_err_ratelimited("diag: In %s, invalid type: %d\n", __func__, type); return; } spin_lock_irqsave(&ws_ref->lock, flags); ws_ref->copy_count++; spin_unlock_irqrestore(&ws_ref->lock, flags); } void diag_ws_on_copy_fail(int type) { unsigned long flags; struct diag_ws_ref_t *ws_ref = NULL; switch (type) { case DIAG_WS_DCI: ws_ref = &driver->dci_ws; break; case DIAG_WS_MUX: ws_ref = &driver->md_ws; break; default: pr_err_ratelimited("diag: In %s, invalid type: %d\n", __func__, type); return; } spin_lock_irqsave(&ws_ref->lock, flags); ws_ref->ref_count--; spin_unlock_irqrestore(&ws_ref->lock, flags); diag_ws_release(); } void diag_ws_on_copy_complete(int type) { unsigned long flags; struct diag_ws_ref_t *ws_ref = NULL; switch (type) { case DIAG_WS_DCI: ws_ref = &driver->dci_ws; break; case DIAG_WS_MUX: ws_ref = &driver->md_ws; break; default: pr_err_ratelimited("diag: In %s, invalid type: %d\n", __func__, type); return; } spin_lock_irqsave(&ws_ref->lock, flags); ws_ref->ref_count -= ws_ref->copy_count; if (ws_ref->ref_count < 1) ws_ref->ref_count = 0; ws_ref->copy_count = 0; spin_unlock_irqrestore(&ws_ref->lock, flags); diag_ws_release(); } void diag_ws_reset(int type) { unsigned long flags; struct diag_ws_ref_t *ws_ref = NULL; switch (type) { case DIAG_WS_DCI: ws_ref = &driver->dci_ws; break; case DIAG_WS_MUX: ws_ref = &driver->md_ws; break; default: pr_err_ratelimited("diag: In %s, invalid type: %d\n", __func__, type); return; } spin_lock_irqsave(&ws_ref->lock, flags); ws_ref->ref_count = 0; ws_ref->copy_count = 0; spin_unlock_irqrestore(&ws_ref->lock, flags); diag_ws_release(); } void diag_ws_release() { if (driver->dci_ws.ref_count == 0 && driver->md_ws.ref_count == 0) pm_relax(driver->diag_dev); } #ifdef DIAG_DEBUG static void diag_debug_init(void) { diag_ipc_log = ipc_log_context_create(DIAG_IPC_LOG_PAGES, "diag", 0); if (!diag_ipc_log) pr_err("diag: Failed to create IPC logging context\n"); /* * Set the bit mask here as per diag_ipc_logging.h to enable debug logs * to be logged to IPC */ diag_debug_mask = DIAG_DEBUG_PERIPHERALS | DIAG_DEBUG_DCI | DIAG_DEBUG_BRIDGE; } #else static void diag_debug_init(void) { } #endif static int diag_real_time_info_init(void) { int i; if (!driver) return -EIO; for (i = 0; i < DIAG_NUM_PROC; i++) { driver->real_time_mode[i] = 1; driver->proc_rt_vote_mask[i] |= DIAG_PROC_DCI; driver->proc_rt_vote_mask[i] |= DIAG_PROC_MEMORY_DEVICE; } driver->real_time_update_busy = 0; driver->proc_active_mask = 0; driver->diag_real_time_wq = create_singlethread_workqueue( "diag_real_time_wq"); if (!driver->diag_real_time_wq) return -ENOMEM; INIT_WORK(&(driver->diag_real_time_work), diag_real_time_work_fn); mutex_init(&driver->real_time_mutex); return 0; } static const struct file_operations diagcharfops = { .owner = THIS_MODULE, .read = diagchar_read, .write = diagchar_write, #ifdef CONFIG_COMPAT .compat_ioctl = diagchar_compat_ioctl, #endif .unlocked_ioctl = diagchar_ioctl, .open = diagchar_open, .release = diagchar_close }; static int diagchar_setup_cdev(dev_t devno) { int err; cdev_init(driver->cdev, &diagcharfops); driver->cdev->owner = THIS_MODULE; driver->cdev->ops = &diagcharfops; err = cdev_add(driver->cdev, devno, 1); if (err) { printk(KERN_INFO "diagchar cdev registration failed !\n\n"); return -1; } driver->diagchar_class = class_create(THIS_MODULE, "diag"); if (IS_ERR(driver->diagchar_class)) { printk(KERN_ERR "Error creating diagchar class.\n"); return -1; } driver->diag_dev = device_create(driver->diagchar_class, NULL, devno, (void *)driver, "diag"); if (!driver->diag_dev) return -EIO; driver->diag_dev->power.wakeup = wakeup_source_register("DIAG_WS"); return 0; } static int diagchar_cleanup(void) { if (driver) { if (driver->cdev) { /* TODO - Check if device exists before deleting */ device_destroy(driver->diagchar_class, MKDEV(driver->major, driver->minor_start)); cdev_del(driver->cdev); } if (!IS_ERR(driver->diagchar_class)) class_destroy(driver->diagchar_class); kfree(driver); } return 0; } static int __init diagchar_init(void) { dev_t dev; int error, ret; pr_debug("diagfwd initializing ..\n"); ret = 0; driver = kzalloc(sizeof(struct diagchar_dev) + 5, GFP_KERNEL); if (!driver) return -ENOMEM; kmemleak_not_leak(driver); timer_in_progress = 0; driver->delayed_rsp_id = 0; driver->hdlc_disabled = 0; driver->dci_state = DIAG_DCI_NO_ERROR; setup_timer(&drain_timer, drain_timer_func, 1234); driver->supports_sockets = 1; driver->time_sync_enabled = 0; driver->uses_time_api = 0; driver->poolsize = poolsize; driver->poolsize_hdlc = poolsize_hdlc; driver->poolsize_dci = poolsize_dci; driver->poolsize_user = poolsize_user; /* * POOL_TYPE_MUX_APPS is for the buffers in the Diag MUX layer. * The number of buffers encompasses Diag data generated on * the Apss processor + 1 for the responses generated exclusively on * the Apps processor + data from data channels (4 channels per * peripheral) + data from command channels (2) */ diagmem_setsize(POOL_TYPE_MUX_APPS, itemsize_usb_apps, poolsize_usb_apps + 1 + (NUM_PERIPHERALS * 6)); driver->num_clients = max_clients; driver->logging_mode = DIAG_USB_MODE; driver->mask_check = 0; driver->in_busy_pktdata = 0; driver->in_busy_dcipktdata = 0; driver->rsp_buf_ctxt = SET_BUF_CTXT(APPS_DATA, TYPE_CMD, 1); hdlc_data.ctxt = SET_BUF_CTXT(APPS_DATA, TYPE_DATA, 1); hdlc_data.len = 0; non_hdlc_data.ctxt = SET_BUF_CTXT(APPS_DATA, TYPE_DATA, 1); non_hdlc_data.len = 0; mutex_init(&driver->hdlc_disable_mutex); mutex_init(&driver->diagchar_mutex); mutex_init(&driver->diag_file_mutex); mutex_init(&driver->delayed_rsp_mutex); mutex_init(&apps_data_mutex); init_waitqueue_head(&driver->wait_q); INIT_WORK(&(driver->diag_drain_work), diag_drain_work_fn); INIT_WORK(&(driver->update_user_clients), diag_update_user_client_work_fn); INIT_WORK(&(driver->update_md_clients), diag_update_md_client_work_fn); diag_ws_init(); diag_stats_init(); diag_debug_init(); diag_md_session_init(); driver->incoming_pkt.capacity = DIAG_MAX_REQ_SIZE; driver->incoming_pkt.data = kzalloc(DIAG_MAX_REQ_SIZE, GFP_KERNEL); if (!driver->incoming_pkt.data) goto fail; kmemleak_not_leak(driver->incoming_pkt.data); driver->incoming_pkt.processing = 0; driver->incoming_pkt.read_len = 0; driver->incoming_pkt.remaining = 0; driver->incoming_pkt.total_len = 0; ret = diag_real_time_info_init(); if (ret) goto fail; ret = diag_debugfs_init(); if (ret) goto fail; ret = diag_masks_init(); if (ret) goto fail; ret = diag_mux_init(); if (ret) goto fail; ret = diagfwd_init(); if (ret) goto fail; ret = diag_remote_init(); if (ret) goto fail; ret = diagfwd_bridge_init(); if (ret) goto fail; ret = diagfwd_cntl_init(); if (ret) goto fail; driver->dci_state = diag_dci_init(); ret = diagfwd_peripheral_init(); if (ret) goto fail; diagfwd_cntl_channel_init(); if (driver->dci_state == DIAG_DCI_NO_ERROR) diag_dci_channel_init(); pr_debug("diagchar initializing ..\n"); driver->num = 1; driver->name = ((void *)driver) + sizeof(struct diagchar_dev); strlcpy(driver->name, "diag", 4); /* Get major number from kernel and initialize */ error = alloc_chrdev_region(&dev, driver->minor_start, driver->num, driver->name); if (!error) { driver->major = MAJOR(dev); driver->minor_start = MINOR(dev); } else { pr_err("diag: Major number not allocated\n"); goto fail; } driver->cdev = cdev_alloc(); error = diagchar_setup_cdev(dev); if (error) goto fail; pr_debug("diagchar initialized now"); return 0; fail: pr_err("diagchar is not initialized, ret: %d\n", ret); diag_debugfs_cleanup(); diagchar_cleanup(); diag_mux_exit(); diagfwd_peripheral_exit(); diagfwd_bridge_exit(); diagfwd_exit(); diagfwd_cntl_exit(); diag_dci_exit(); diag_masks_exit(); diag_remote_exit(); return -1; } static void diagchar_exit(void) { printk(KERN_INFO "diagchar exiting ..\n"); diag_mempool_exit(); diag_mux_exit(); diagfwd_peripheral_exit(); diagfwd_exit(); diagfwd_cntl_exit(); diag_dci_exit(); diag_masks_exit(); diag_md_session_exit(); diag_remote_exit(); diag_debugfs_cleanup(); diagchar_cleanup(); printk(KERN_INFO "done diagchar exit\n"); } module_init(diagchar_init); module_exit(diagchar_exit);