| /* Copyright (c) 2008-2018, 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 <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/cdev.h> |
| #include <linux/fs.h> |
| #include <linux/device.h> |
| #include <linux/delay.h> |
| #include <linux/uaccess.h> |
| #include <linux/diagchar.h> |
| #include <linux/sched.h> |
| #include <linux/ratelimit.h> |
| #include <linux/timer.h> |
| #ifdef CONFIG_DIAG_OVER_USB |
| #include <linux/usb/usbdiag.h> |
| #endif |
| #include <asm/current.h> |
| #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 <linux/coresight-stm.h> |
| #include <linux/kernel.h> |
| #ifdef CONFIG_COMPAT |
| #include <linux/compat.h> |
| #endif |
| |
| MODULE_DESCRIPTION("Diag Char Driver"); |
| MODULE_LICENSE("GPL v2"); |
| |
| #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, 0000); |
| |
| /* |
| * Used for HDLC encoding packets coming from the user |
| * space. |
| */ |
| static unsigned int poolsize_hdlc = 10; |
| module_param(poolsize_hdlc, uint, 0000); |
| |
| /* |
| * 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, 0000); |
| |
| /* |
| * 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, 0000); |
| |
| /* Used for DCI client buffers. Don't expose itemsize as it is constant. */ |
| static unsigned int poolsize_dci = 10; |
| module_param(poolsize_dci, uint, 0000); |
| |
| #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 = 18; |
| module_param(itemsize_mdm, uint, 0000); |
| module_param(poolsize_mdm, uint, 0000); |
| |
| /* |
| * 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, 0000); |
| |
| /* |
| * 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 = 18; |
| module_param(poolsize_mdm_usb, uint, 0000); |
| |
| /* |
| * 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, 0000); |
| |
| /* |
| * 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, 0000); |
| #endif |
| |
| /* This is the max number of user-space clients supported at initialization*/ |
| static unsigned int max_clients = 15; |
| module_param(max_clients, uint, 0000); |
| |
| /* Timer variables */ |
| static struct timer_list drain_timer; |
| static int timer_in_progress; |
| |
| /* |
| * Diag Mask clear variable |
| * Used for clearing masks upon |
| * USB disconnection and stopping ODL |
| */ |
| static int diag_mask_clear_param = 1; |
| module_param(diag_mask_clear_param, int, 0644); |
| |
| 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 CONFIG_IPC_LOGGING |
| uint16_t diag_debug_mask; |
| void *diag_ipc_log; |
| #endif |
| |
| static void diag_md_session_close(int pid); |
| |
| /* |
| * 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_ERR(buf, data, length) \ |
| do { \ |
| if ((count < ret+length) || (copy_to_user(buf, \ |
| (void *)&data, length))) { \ |
| ret = -EFAULT; \ |
| } \ |
| 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) |
| { |
| uint8_t hdlc_disabled = 0; |
| |
| timer_in_progress = 0; |
| mutex_lock(&apps_data_mutex); |
| mutex_lock(&driver->hdlc_disable_mutex); |
| hdlc_disabled = driver->p_hdlc_disabled[APPS_DATA]; |
| mutex_unlock(&driver->hdlc_disable_mutex); |
| 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_err_ratelimited("diag: Max client limit for DIAG reached\n"); |
| pr_err_ratelimited("diag: 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; |
| atomic_set(&driver->data_ready_notif[i], 0); |
| driver->data_ready[i] |= MSG_MASKS_TYPE; |
| atomic_inc(&driver->data_ready_notif[i]); |
| driver->data_ready[i] |= EVENT_MASKS_TYPE; |
| atomic_inc(&driver->data_ready_notif[i]); |
| driver->data_ready[i] |= LOG_MASKS_TYPE; |
| atomic_inc(&driver->data_ready_notif[i]); |
| driver->data_ready[i] |= DCI_LOG_MASKS_TYPE; |
| atomic_inc(&driver->data_ready_notif[i]); |
| driver->data_ready[i] |= DCI_EVENT_MASKS_TYPE; |
| atomic_inc(&driver->data_ready_notif[i]); |
| |
| if (driver->ref_count == 0) |
| diag_mempool_init(); |
| driver->ref_count++; |
| mutex_unlock(&driver->diagchar_mutex); |
| return 0; |
| } |
| return -ENOMEM; |
| |
| fail: |
| driver->num_clients--; |
| mutex_unlock(&driver->diagchar_mutex); |
| pr_err_ratelimited("diag: Insufficient memory for new client"); |
| return -ENOMEM; |
| } |
| |
| static uint32_t diag_translate_kernel_to_user_mask(uint32_t peripheral_mask) |
| { |
| uint32_t ret = 0; |
| |
| if (peripheral_mask & MD_PERIPHERAL_MASK(APPS_DATA)) |
| ret |= DIAG_CON_APSS; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_MODEM)) |
| ret |= DIAG_CON_MPSS; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_LPASS)) |
| ret |= DIAG_CON_LPASS; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_WCNSS)) |
| ret |= DIAG_CON_WCNSS; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_SENSORS)) |
| ret |= DIAG_CON_SENSORS; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_WDSP)) |
| ret |= DIAG_CON_WDSP; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(PERIPHERAL_CDSP)) |
| ret |= DIAG_CON_CDSP; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(UPD_WLAN)) |
| ret |= DIAG_CON_UPD_WLAN; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(UPD_AUDIO)) |
| ret |= DIAG_CON_UPD_AUDIO; |
| if (peripheral_mask & MD_PERIPHERAL_MASK(UPD_SENSORS)) |
| ret |= DIAG_CON_UPD_SENSORS; |
| return ret; |
| } |
| |
| uint8_t diag_mask_to_pd_value(uint32_t peripheral_mask) |
| { |
| uint8_t upd = 0; |
| |
| for (upd = UPD_WLAN; upd < NUM_MD_SESSIONS; upd++) { |
| if (peripheral_mask & (1 << upd)) |
| return upd; |
| } |
| return 0; |
| } |
| |
| int diag_mask_param(void) |
| { |
| return diag_mask_clear_param; |
| } |
| void diag_clear_masks(int pid) |
| { |
| int ret; |
| char cmd_disable_log_mask[] = { 0x73, 0, 0, 0, 0, 0, 0, 0}; |
| char cmd_disable_msg_mask[] = { 0x7D, 0x05, 0, 0, 0, 0, 0, 0}; |
| char cmd_disable_event_mask[] = { 0x60, 0}; |
| |
| DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| "diag: %s: masks clear request upon %s\n", __func__, |
| ((pid) ? "ODL exit" : "USB Disconnection")); |
| |
| ret = diag_process_apps_masks(cmd_disable_log_mask, |
| sizeof(cmd_disable_log_mask), pid); |
| ret = diag_process_apps_masks(cmd_disable_msg_mask, |
| sizeof(cmd_disable_msg_mask), pid); |
| ret = diag_process_apps_masks(cmd_disable_event_mask, |
| sizeof(cmd_disable_event_mask), pid); |
| DIAG_LOG(DIAG_DEBUG_PERIPHERALS, |
| "diag:%s: masks cleared successfully\n", __func__); |
| } |
| |
| static void diag_close_logging_process(const int pid) |
| { |
| int i, j; |
| int session_mask; |
| uint32_t p_mask; |
| struct diag_md_session_t *session_info = NULL; |
| struct diag_logging_mode_param_t params; |
| |
| mutex_lock(&driver->md_session_lock); |
| session_info = diag_md_session_get_pid(pid); |
| if (!session_info) { |
| mutex_unlock(&driver->md_session_lock); |
| return; |
| } |
| session_mask = session_info->peripheral_mask; |
| mutex_unlock(&driver->md_session_lock); |
| |
| if (diag_mask_clear_param) |
| diag_clear_masks(pid); |
| |
| mutex_lock(&driver->diagchar_mutex); |
| p_mask = |
| diag_translate_kernel_to_user_mask(session_mask); |
| |
| for (i = 0; i < NUM_MD_SESSIONS; i++) |
| if (MD_PERIPHERAL_MASK(i) & session_mask) |
| diag_mux_close_peripheral(DIAG_LOCAL_PROC, i); |
| |
| params.req_mode = USB_MODE; |
| params.mode_param = 0; |
| params.pd_mask = 0; |
| params.peripheral_mask = p_mask; |
| |
| if (driver->num_pd_session > 0) { |
| for (i = UPD_WLAN; (i < NUM_MD_SESSIONS); i++) { |
| if (session_mask & MD_PERIPHERAL_MASK(i)) { |
| j = i - UPD_WLAN; |
| driver->pd_session_clear[j] = 1; |
| driver->pd_logging_mode[j] = 0; |
| driver->num_pd_session -= 1; |
| params.pd_mask = p_mask; |
| } |
| } |
| } |
| mutex_lock(&driver->md_session_lock); |
| diag_md_session_close(pid); |
| mutex_unlock(&driver->md_session_lock); |
| 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 |
| */ |
| mutex_lock(&driver->dci_mutex); |
| dci_entry = dci_lookup_client_entry_pid(current->tgid); |
| if (dci_entry) |
| diag_dci_deinit_client(dci_entry); |
| mutex_unlock(&driver->dci_mutex); |
| |
| 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 (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) |
| { |
| int ret; |
| |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, "diag: process exit %s\n", |
| current->comm); |
| ret = diag_remove_client_entry(file); |
| |
| return ret; |
| } |
| |
| 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); |
| if (&item->entry == NULL) { |
| pr_err("diag: In %s, unable to search command\n", |
| __func__); |
| return; |
| } |
| 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) |
| 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); |
| if (&item->entry == NULL) { |
| pr_err("diag: In %s, unable to search command\n", |
| __func__); |
| return NULL; |
| } |
| 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->entry == NULL) { |
| pr_err("diag: In %s, unable to search command\n", |
| __func__); |
| mutex_unlock(&driver->cmd_reg_mutex); |
| return; |
| } |
| 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->entry == NULL) { |
| pr_err("diag: In %s, unable to search command\n", |
| __func__); |
| mutex_unlock(&driver->cmd_reg_mutex); |
| return; |
| } |
| 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_ERR(buf+8, total_data_len, 4); |
| if (ret == -EFAULT) |
| goto exit; |
| 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); |
| diag_md_mdm_init(); |
| if (diag_dci_init_remote()) |
| return -ENOMEM; |
| 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; |
| 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; |
| mutex_lock(&driver->hdlc_disable_mutex); |
| hdlc_disabled = driver->p_hdlc_disabled[APPS_DATA]; |
| mutex_unlock(&driver->hdlc_disable_mutex); |
| if (hdlc_disabled) { |
| if (len < 4) { |
| pr_err("diag: In %s, invalid len: %d of non_hdlc pkt", |
| __func__, len); |
| return -EBADMSG; |
| } |
| payload = *(uint16_t *)(buf + 2); |
| if (payload > DIAG_MAX_HDLC_BUF_SIZE) { |
| pr_err("diag: Dropping packet, payload size is %d\n", |
| payload); |
| return -EBADMSG; |
| } |
| driver->hdlc_encode_buf_len = payload; |
| /* |
| * Adding 5 bytes for start (1 byte), version (1 byte), |
| * payload (2 bytes) and end (1 byte) |
| */ |
| if (len == (payload + 5)) { |
| /* |
| * 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; |
| } else { |
| pr_err("diag: In %s, invalid len: %d of non_hdlc pkt", |
| __func__, len); |
| return -EBADMSG; |
| } |
| } |
| |
| if (hdlc_flag) { |
| if (len > DIAG_MAX_HDLC_BUF_SIZE) { |
| 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 (max_len > DIAG_MAX_HDLC_BUF_SIZE) { |
| 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(bridge_index, 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: %pK, 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) |
| { |
| } |
| |
| int diagfwd_bridge_init(void) |
| { |
| return 0; |
| } |
| |
| void diagfwd_bridge_exit(void) |
| { |
| } |
| |
| 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; |
| } |
| } 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; |
| default: |
| return 0; |
| } |
| } |
| 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 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_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; |
| 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; |
| kfree(new_session); |
| new_session = NULL; |
| mutex_unlock(&driver->md_session_lock); |
| return err; |
| } |
| |
| static void diag_md_session_close(int pid) |
| { |
| int i; |
| uint8_t found = 0; |
| struct diag_md_session_t *session_info = NULL; |
| |
| session_info = diag_md_session_get_pid(pid); |
| if (!session_info) |
| return; |
| |
| 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; |
| } |
| 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; |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, "cleared up session\n"); |
| } |
| |
| struct diag_md_session_t *diag_md_session_get_pid(int pid) |
| { |
| int i; |
| if (pid <= 0) |
| return NULL; |
| 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]; |
| } |
| |
| /* |
| * diag_md_session_match_pid_peripheral |
| * |
| * 1. Pass valid PID and get all the peripherals in logging session |
| * for that PID |
| * 2. Pass valid Peipheral and get the pid logging for that peripheral |
| * |
| */ |
| |
| int diag_md_session_match_pid_peripheral(int pid, |
| uint8_t peripheral) |
| { |
| int i, flag = 0; |
| |
| if (pid <= 0 || peripheral >= NUM_MD_SESSIONS) |
| return -EINVAL; |
| |
| if (!peripheral) { |
| for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| if (driver->md_session_map[i] && |
| driver->md_session_map[i]->pid == pid) { |
| peripheral |= 1 << i; |
| flag = 1; |
| } |
| } |
| if (flag) |
| return peripheral; |
| } |
| |
| if (!pid) { |
| if (driver->md_session_map[peripheral]) |
| return driver->md_session_map[peripheral]->pid; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int diag_md_peripheral_switch(int pid, |
| int peripheral_mask, int req_mode) { |
| int i, bit = 0; |
| struct diag_md_session_t *session_info = NULL; |
| |
| session_info = diag_md_session_get_pid(pid); |
| if (!session_info) |
| return -EINVAL; |
| if (req_mode != DIAG_USB_MODE || req_mode != DIAG_MEMORY_DEVICE_MODE) |
| return -EINVAL; |
| |
| /* |
| * check that md_session_map for i == session_info, |
| * if not then race condition occurred and bail |
| */ |
| for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| bit = MD_PERIPHERAL_MASK(i) & peripheral_mask; |
| if (!bit) |
| continue; |
| if (req_mode == DIAG_USB_MODE) { |
| if (driver->md_session_map[i] != session_info) |
| return -EINVAL; |
| driver->md_session_map[i] = NULL; |
| driver->md_session_mask &= ~bit; |
| session_info->peripheral_mask &= ~bit; |
| |
| } else { |
| if (driver->md_session_map[i] != NULL) |
| return -EINVAL; |
| driver->md_session_map[i] = session_info; |
| driver->md_session_mask |= bit; |
| session_info->peripheral_mask |= bit; |
| |
| } |
| } |
| |
| driver->md_session_mode = DIAG_MD_PERIPHERAL; |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, "Changed Peripherals:0x%x to mode:%d\n", |
| peripheral_mask, req_mode); |
| } |
| |
| 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 i, bit = 0, err = 0, peripheral_mask = 0; |
| int change_mask = 0; |
| struct diag_md_session_t *session_info = NULL; |
| |
| if (!param || !change_mode) |
| return -EIO; |
| |
| *change_mode = 0; |
| |
| switch (curr_mode) { |
| case DIAG_USB_MODE: |
| case DIAG_MEMORY_DEVICE_MODE: |
| case DIAG_MULTI_MODE: |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (req_mode != DIAG_USB_MODE && req_mode != DIAG_MEMORY_DEVICE_MODE) |
| return -EINVAL; |
| |
| if (req_mode == DIAG_USB_MODE) { |
| if (curr_mode == DIAG_USB_MODE) |
| return 0; |
| mutex_lock(&driver->md_session_lock); |
| if (driver->md_session_mode == DIAG_MD_NONE |
| && driver->md_session_mask == 0 && driver->logging_mask) { |
| *change_mode = 1; |
| mutex_unlock(&driver->md_session_lock); |
| return 0; |
| } |
| /* |
| * curr_mode is either DIAG_MULTI_MODE or DIAG_MD_MODE |
| * Check if requested peripherals are already in usb mode |
| */ |
| for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| bit = MD_PERIPHERAL_MASK(i) & param->peripheral_mask; |
| if (!bit) |
| continue; |
| if (bit & driver->logging_mask) |
| change_mask |= bit; |
| } |
| if (!change_mask) { |
| mutex_unlock(&driver->md_session_lock); |
| return 0; |
| } |
| |
| /* |
| * Change is needed. Check if this md_session has set all the |
| * requested peripherals. If another md session set a requested |
| * peripheral then we cannot switch that peripheral to USB. |
| * If this session owns all the requested peripherals, then |
| * call function to switch the modes/masks for the md_session |
| */ |
| session_info = diag_md_session_get_pid(current->tgid); |
| if (!session_info) { |
| *change_mode = 1; |
| mutex_unlock(&driver->md_session_lock); |
| return 0; |
| } |
| peripheral_mask = session_info->peripheral_mask; |
| if ((change_mask & peripheral_mask) |
| != change_mask) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "Another MD Session owns a requested peripheral\n"); |
| mutex_unlock(&driver->md_session_lock); |
| return -EINVAL; |
| } |
| *change_mode = 1; |
| |
| /* If all peripherals are being set to USB Mode, call close */ |
| if (~change_mask & peripheral_mask) { |
| err = diag_md_peripheral_switch(current->tgid, |
| change_mask, DIAG_USB_MODE); |
| } else |
| diag_md_session_close(current->tgid); |
| mutex_unlock(&driver->md_session_lock); |
| return err; |
| |
| } else if (req_mode == DIAG_MEMORY_DEVICE_MODE) { |
| /* |
| * Get bit mask that represents what peripherals already have |
| * been set. Check that requested peripherals already set are |
| * owned by this md session |
| */ |
| mutex_lock(&driver->md_session_lock); |
| change_mask = driver->md_session_mask & param->peripheral_mask; |
| session_info = diag_md_session_get_pid(current->tgid); |
| |
| if (session_info) { |
| if ((session_info->peripheral_mask & change_mask) |
| != change_mask) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "Another MD Session owns a requested peripheral\n"); |
| mutex_unlock(&driver->md_session_lock); |
| return -EINVAL; |
| } |
| err = diag_md_peripheral_switch(current->tgid, |
| change_mask, DIAG_USB_MODE); |
| mutex_unlock(&driver->md_session_lock); |
| } else { |
| mutex_unlock(&driver->md_session_lock); |
| if (change_mask) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "Another MD Session owns a requested peripheral\n"); |
| return -EINVAL; |
| } |
| err = diag_md_session_create(DIAG_MD_PERIPHERAL, |
| param->peripheral_mask, DIAG_LOCAL_PROC); |
| mutex_lock(&driver->hdlc_disable_mutex); |
| for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| if ((param->peripheral_mask > 0) && |
| (param->peripheral_mask & (1 << i))) |
| driver->p_hdlc_disabled[i] = 0; |
| } |
| mutex_unlock(&driver->hdlc_disable_mutex); |
| } |
| *change_mode = 1; |
| 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); |
| if (peripheral_mask & DIAG_CON_WDSP) |
| ret |= (1 << PERIPHERAL_WDSP); |
| if (peripheral_mask & DIAG_CON_CDSP) |
| ret |= (1 << PERIPHERAL_CDSP); |
| if (peripheral_mask & DIAG_CON_UPD_WLAN) |
| ret |= (1 << UPD_WLAN); |
| if (peripheral_mask & DIAG_CON_UPD_AUDIO) |
| ret |= (1 << UPD_AUDIO); |
| if (peripheral_mask & DIAG_CON_UPD_SENSORS) |
| ret |= (1 << UPD_SENSORS); |
| return ret; |
| } |
| |
| static void diag_switch_logging_clear_mask( |
| struct diag_logging_mode_param_t *param, int pid) |
| { |
| int new_mode; |
| struct diag_md_session_t *session_info = NULL; |
| |
| mutex_lock(&driver->md_session_lock); |
| session_info = diag_md_session_get_pid(pid); |
| if (!session_info) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, "Invalid pid: %d\n", pid); |
| mutex_unlock(&driver->md_session_lock); |
| return; |
| } |
| mutex_unlock(&driver->md_session_lock); |
| |
| if (!param) |
| return; |
| |
| if (!param->peripheral_mask) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "asking for mode switch with no peripheral mask set\n"); |
| return; |
| } |
| |
| 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: |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "Request to switch to invalid mode: %d\n", |
| param->req_mode); |
| return; |
| } |
| if ((new_mode == DIAG_USB_MODE) && diag_mask_clear_param) |
| diag_clear_masks(pid); |
| |
| } |
| |
| static int diag_switch_logging(struct diag_logging_mode_param_t *param) |
| { |
| int new_mode, i = 0; |
| int curr_mode, err = 0, peripheral = 0; |
| uint8_t do_switch = 1; |
| uint32_t peripheral_mask = 0, pd_mask = 0; |
| |
| if (!param) |
| return -EINVAL; |
| |
| if (!param->peripheral_mask) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "asking for mode switch with no peripheral mask set\n"); |
| return -EINVAL; |
| } |
| |
| if (param->pd_mask) { |
| pd_mask = diag_translate_mask(param->pd_mask); |
| param->diag_id = 0; |
| param->pd_val = 0; |
| param->peripheral = -EINVAL; |
| |
| for (i = UPD_WLAN; i < NUM_MD_SESSIONS; i++) { |
| if (pd_mask & (1 << i)) { |
| if (diag_search_diagid_by_pd(i, ¶m->diag_id, |
| ¶m->peripheral)) { |
| param->pd_val = i; |
| break; |
| } |
| } |
| } |
| |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "diag: pd_mask = %d, diag_id = %d, peripheral = %d, pd_val = %d\n", |
| param->pd_mask, param->diag_id, |
| param->peripheral, param->pd_val); |
| |
| if (!param->diag_id || |
| (param->pd_val < UPD_WLAN) || |
| (param->pd_val >= NUM_MD_SESSIONS)) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "diag_id support is not present for the pd mask = %d\n", |
| param->pd_mask); |
| return -EINVAL; |
| } |
| |
| peripheral = param->peripheral; |
| if ((peripheral < PERIPHERAL_MODEM) || |
| (peripheral >= NUM_PERIPHERALS)) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "Invalid peripheral: %d\n", peripheral); |
| return -EINVAL; |
| } |
| i = param->pd_val - UPD_WLAN; |
| mutex_lock(&driver->md_session_lock); |
| if (driver->md_session_map[peripheral] && |
| (MD_PERIPHERAL_MASK(peripheral) & |
| diag_mux->mux_mask) && |
| !driver->pd_session_clear[i]) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "diag_fr: User PD is already logging onto active peripheral logging\n"); |
| mutex_unlock(&driver->md_session_lock); |
| driver->pd_session_clear[i] = 0; |
| return -EINVAL; |
| } |
| mutex_unlock(&driver->md_session_lock); |
| peripheral_mask = |
| diag_translate_mask(param->pd_mask); |
| param->peripheral_mask = peripheral_mask; |
| if (!driver->pd_session_clear[i]) { |
| driver->pd_logging_mode[i] = 1; |
| driver->num_pd_session += 1; |
| } |
| driver->pd_session_clear[i] = 0; |
| } else { |
| 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 mask:%0x to new_mode %d mask:%0x\n", |
| curr_mode, driver->md_session_mask, new_mode, peripheral_mask); |
| |
| 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, &peripheral_mask); |
| 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; |
| driver->logging_mask = peripheral_mask; |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "Switch logging to %d mask:%0x\n", new_mode, peripheral_mask); |
| |
| /* Update to take peripheral_mask */ |
| 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; |
| |
| mutex_lock(&driver->diagchar_mutex); |
| for (i = 0; i < driver->num_clients; i++) |
| if (driver->client_map[i].pid == current->tgid) |
| break; |
| |
| if (i == driver->num_clients) { |
| mutex_unlock(&driver->diagchar_mutex); |
| return -EINVAL; |
| } |
| if (!(driver->data_ready[i] & DEINIT_TYPE)) { |
| driver->data_ready[i] |= DEINIT_TYPE; |
| atomic_inc(&driver->data_ready_notif[i]); |
| } |
| mutex_unlock(&driver->diagchar_mutex); |
| 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; |
| int peripheral = 0; |
| uint8_t diag_id = 0; |
| |
| if (copy_from_user(¶ms, (void __user *)ioarg, sizeof(params))) |
| return -EFAULT; |
| |
| diag_map_pd_to_diagid(params.peripheral, &diag_id, &peripheral); |
| |
| if ((peripheral < 0) || |
| peripheral >= NUM_PERIPHERALS) { |
| pr_err("diag: In %s, invalid peripheral = %d\n", __func__, |
| peripheral); |
| return -EIO; |
| } |
| |
| if (params.peripheral > NUM_PERIPHERALS && |
| !driver->feature[peripheral].pd_buffering) { |
| pr_err("diag: In %s, pd buffering not supported for peripheral:%d\n", |
| __func__, peripheral); |
| return -EIO; |
| } |
| |
| if (!driver->feature[peripheral].peripheral_buffering) { |
| pr_err("diag: In %s, peripheral %d doesn't support buffering\n", |
| __func__, peripheral); |
| return -EIO; |
| } |
| |
| 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 pd, diag_id = 0; |
| int peripheral = 0; |
| |
| if (copy_from_user(&pd, (void __user *)ioarg, sizeof(uint8_t))) |
| return -EFAULT; |
| |
| diag_map_pd_to_diagid(pd, &diag_id, &peripheral); |
| |
| if ((peripheral < 0) || |
| peripheral >= NUM_PERIPHERALS) { |
| pr_err("diag: In %s, invalid peripheral %d\n", __func__, |
| peripheral); |
| return -EINVAL; |
| } |
| |
| if (pd > NUM_PERIPHERALS && |
| !driver->feature[peripheral].pd_buffering) { |
| pr_err("diag: In %s, pd buffering not supported for peripheral:%d\n", |
| __func__, peripheral); |
| return -EIO; |
| } |
| |
| return diag_send_peripheral_drain_immediate(pd, diag_id, 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, i; |
| int peripheral = -EINVAL; |
| struct diag_md_session_t *session_info = NULL; |
| |
| if (copy_from_user(&hdlc_support, (void __user *)ioarg, |
| sizeof(uint8_t))) |
| return -EFAULT; |
| |
| mutex_lock(&driver->hdlc_disable_mutex); |
| mutex_lock(&driver->md_session_lock); |
| session_info = diag_md_session_get_pid(current->tgid); |
| if (session_info) |
| session_info->hdlc_disabled = hdlc_support; |
| else |
| driver->hdlc_disabled = hdlc_support; |
| |
| peripheral = |
| diag_md_session_match_pid_peripheral(current->tgid, |
| 0); |
| for (i = 0; i < NUM_MD_SESSIONS; i++) { |
| if (peripheral > 0 && session_info) { |
| if (peripheral & (1 << i)) |
| driver->p_hdlc_disabled[i] = |
| session_info->hdlc_disabled; |
| else if (!diag_md_session_get_peripheral(i)) |
| driver->p_hdlc_disabled[i] = |
| driver->hdlc_disabled; |
| } else { |
| if (!diag_md_session_get_peripheral(i)) |
| driver->p_hdlc_disabled[i] = |
| driver->hdlc_disabled; |
| } |
| } |
| |
| mutex_unlock(&driver->md_session_lock); |
| mutex_unlock(&driver->hdlc_disable_mutex); |
| diag_update_md_clients(HDLC_SUPPORT_TYPE); |
| |
| return 0; |
| } |
| |
| /* |
| * diag_search_peripheral_by_pd(uint8_t pd_val) |
| * |
| * Function will return peripheral by searching pd in the |
| * diag_id table. |
| * |
| */ |
| |
| int diag_search_peripheral_by_pd(uint8_t pd_val) |
| { |
| struct list_head *start; |
| struct list_head *temp; |
| struct diag_id_tbl_t *item = NULL; |
| |
| mutex_lock(&driver->diag_id_mutex); |
| list_for_each_safe(start, temp, &driver->diag_id_list) { |
| item = list_entry(start, struct diag_id_tbl_t, link); |
| if (pd_val == item->pd_val) { |
| mutex_unlock(&driver->diag_id_mutex); |
| return item->peripheral; |
| } |
| } |
| mutex_unlock(&driver->diag_id_mutex); |
| return -EINVAL; |
| } |
| |
| /* |
| * diag_search_diagid_by_pd(uint8_t pd_val, |
| * uint8_t *diag_id, int *peripheral) |
| * |
| * Function will update the peripheral and diag_id |
| * from the pd passed as an argument. |
| * |
| */ |
| |
| uint8_t diag_search_diagid_by_pd(uint8_t pd_val, |
| uint8_t *diag_id, int *peripheral) |
| { |
| struct list_head *start; |
| struct list_head *temp; |
| struct diag_id_tbl_t *item = NULL; |
| |
| mutex_lock(&driver->diag_id_mutex); |
| list_for_each_safe(start, temp, &driver->diag_id_list) { |
| item = list_entry(start, struct diag_id_tbl_t, link); |
| if (pd_val == item->pd_val) { |
| *peripheral = item->peripheral; |
| *diag_id = item->diag_id; |
| mutex_unlock(&driver->diag_id_mutex); |
| return 1; |
| } |
| } |
| mutex_unlock(&driver->diag_id_mutex); |
| return 0; |
| } |
| |
| /* |
| * diag_query_pd_name(char *process_name, char *search_str) |
| * |
| * The function searches the pd string in the control packet string |
| * from the peripheral |
| * |
| */ |
| |
| static int diag_query_pd_name(char *process_name, char *search_str) |
| { |
| if (!process_name) |
| return -EINVAL; |
| |
| if (strnstr(process_name, search_str, strlen(process_name))) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* |
| * diag_query_pd_name(char *process_name, char *search_str) |
| * |
| * The function returns the PD information based on the presence of |
| * the pd specific string in the control packet's string from peripheral. |
| * |
| */ |
| |
| int diag_query_pd(char *process_name) |
| { |
| if (!process_name) |
| return -EINVAL; |
| |
| if (diag_query_pd_name(process_name, "modem/root_pd")) |
| return PERIPHERAL_MODEM; |
| if (diag_query_pd_name(process_name, "adsp/root_pd")) |
| return PERIPHERAL_LPASS; |
| if (diag_query_pd_name(process_name, "slpi/root_pd")) |
| return PERIPHERAL_SENSORS; |
| if (diag_query_pd_name(process_name, "cdsp/root_pd")) |
| return PERIPHERAL_CDSP; |
| if (diag_query_pd_name(process_name, "wlan_pd")) |
| return UPD_WLAN; |
| if (diag_query_pd_name(process_name, "audio_pd")) |
| return UPD_AUDIO; |
| if (diag_query_pd_name(process_name, "sensor_pd")) |
| return UPD_SENSORS; |
| |
| return -EINVAL; |
| } |
| |
| /* |
| * diag_ioctl_query_pd_logging(struct diag_logging_mode_param_t *param) |
| * |
| * IOCTL handler based on the parameter received will check on which peripheral |
| * the PD is present and validate if the peripheral supports the diag_id and |
| * tagging feature. |
| * |
| */ |
| |
| static int diag_ioctl_query_pd_logging(struct diag_logging_mode_param_t *param) |
| { |
| int ret = -EINVAL, i = 0; |
| int peripheral = -EINVAL; |
| uint32_t pd_mask = 0; |
| |
| if (!param) |
| return -EINVAL; |
| |
| if (!param->pd_mask) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "query with no pd mask set, returning error\n"); |
| return -EINVAL; |
| } |
| |
| if (param->pd_mask) { |
| pd_mask = diag_translate_mask(param->pd_mask); |
| for (i = UPD_WLAN; i < NUM_MD_SESSIONS; i++) { |
| if (pd_mask & (1 << i)) { |
| peripheral = diag_search_peripheral_by_pd(i); |
| break; |
| } |
| } |
| if (peripheral < 0) { |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "diag_id support is not present for the pd mask = %d\n", |
| param->pd_mask); |
| return -EINVAL; |
| } |
| } |
| mutex_lock(&driver->diag_cntl_mutex); |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "diag: %s: Untagging support on APPS is %s\n", __func__, |
| ((driver->supports_apps_header_untagging) ? |
| "present" : "absent")); |
| |
| DIAG_LOG(DIAG_DEBUG_USERSPACE, |
| "diag: %s: Tagging support on peripheral = %d is %s\n", |
| __func__, peripheral, |
| (driver->feature[peripheral].untag_header ? |
| "present" : "absent")); |
| |
| if (driver->supports_apps_header_untagging && |
| driver->feature[peripheral].untag_header) |
| ret = 0; |
| |
| mutex_unlock(&driver->diag_cntl_mutex); |
| return ret; |
| } |
| |
| 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_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) |
| 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: |
| mutex_lock(&driver->dci_mutex); |
| if (copy_from_user((void *)&client_id, (void __user *)ioarg, |
| sizeof(int))) { |
| mutex_unlock(&driver->dci_mutex); |
| return -EFAULT; |
| } |
| dci_client = diag_dci_get_client_entry(client_id); |
| if (!dci_client) { |
| mutex_unlock(&driver->dci_mutex); |
| return DIAG_DCI_NOT_SUPPORTED; |
| } |
| result = diag_dci_deinit_client(dci_client); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_SUPPORT: |
| result = diag_ioctl_dci_support(ioarg); |
| break; |
| case DIAG_IOCTL_DCI_HEALTH_STATS: |
| mutex_lock(&driver->dci_mutex); |
| result = diag_ioctl_dci_health_stats(ioarg); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_LOG_STATUS: |
| mutex_lock(&driver->dci_mutex); |
| result = diag_ioctl_dci_log_status(ioarg); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_EVENT_STATUS: |
| mutex_lock(&driver->dci_mutex); |
| result = diag_ioctl_dci_event_status(ioarg); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_CLEAR_LOGS: |
| mutex_lock(&driver->dci_mutex); |
| if (copy_from_user((void *)&client_id, (void __user *)ioarg, |
| sizeof(int))) { |
| mutex_unlock(&driver->dci_mutex); |
| return -EFAULT; |
| } |
| result = diag_dci_clear_log_mask(client_id); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_CLEAR_EVENTS: |
| mutex_lock(&driver->dci_mutex); |
| if (copy_from_user(&client_id, (void __user *)ioarg, |
| sizeof(int))) { |
| mutex_unlock(&driver->dci_mutex); |
| return -EFAULT; |
| } |
| result = diag_dci_clear_event_mask(client_id); |
| mutex_unlock(&driver->dci_mutex); |
| 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; |
| diag_switch_logging_clear_mask(&mode_param, current->tgid); |
| 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: |
| mutex_lock(&driver->dci_mutex); |
| result = diag_ioctl_vote_real_time(ioarg); |
| mutex_unlock(&driver->dci_mutex); |
| 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; |
| case DIAG_IOCTL_QUERY_PD_LOGGING: |
| if (copy_from_user((void *)&mode_param, (void __user *)ioarg, |
| sizeof(mode_param))) |
| return -EFAULT; |
| result = diag_ioctl_query_pd_logging(&mode_param); |
| 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: |
| mutex_lock(&driver->dci_mutex); |
| if (copy_from_user((void *)&client_id, (void __user *)ioarg, |
| sizeof(int))) { |
| mutex_unlock(&driver->dci_mutex); |
| return -EFAULT; |
| } |
| dci_client = diag_dci_get_client_entry(client_id); |
| if (!dci_client) { |
| mutex_unlock(&driver->dci_mutex); |
| return DIAG_DCI_NOT_SUPPORTED; |
| } |
| result = diag_dci_deinit_client(dci_client); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_SUPPORT: |
| result = diag_ioctl_dci_support(ioarg); |
| break; |
| case DIAG_IOCTL_DCI_HEALTH_STATS: |
| mutex_lock(&driver->dci_mutex); |
| result = diag_ioctl_dci_health_stats(ioarg); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_LOG_STATUS: |
| mutex_lock(&driver->dci_mutex); |
| result = diag_ioctl_dci_log_status(ioarg); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_EVENT_STATUS: |
| mutex_lock(&driver->dci_mutex); |
| result = diag_ioctl_dci_event_status(ioarg); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_CLEAR_LOGS: |
| mutex_lock(&driver->dci_mutex); |
| if (copy_from_user((void *)&client_id, (void __user *)ioarg, |
| sizeof(int))) { |
| mutex_unlock(&driver->dci_mutex); |
| return -EFAULT; |
| } |
| result = diag_dci_clear_log_mask(client_id); |
| mutex_unlock(&driver->dci_mutex); |
| break; |
| case DIAG_IOCTL_DCI_CLEAR_EVENTS: |
| mutex_lock(&driver->dci_mutex); |
| if (copy_from_user(&client_id, (void __user *)ioarg, |
| sizeof(int))) { |
| mutex_unlock(&driver->dci_mutex); |
| return -EFAULT; |
| } |
| result = diag_dci_clear_event_mask(client_id); |
| mutex_unlock(&driver->dci_mutex); |
| 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; |
| diag_switch_logging_clear_mask(&mode_param, current->tgid); |
| 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: |
| mutex_lock(&driver->dci_mutex); |
| result = diag_ioctl_vote_real_time(ioarg); |
| mutex_unlock(&driver->dci_mutex); |
| 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; |
| case DIAG_IOCTL_QUERY_PD_LOGGING: |
| if (copy_from_user((void *)&mode_param, (void __user *)ioarg, |
| sizeof(mode_param))) |
| return -EFAULT; |
| result = diag_ioctl_query_pd_logging(&mode_param); |
| 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: %pK len: %d\n", |
| __func__, buf, len); |
| return -EIO; |
| } |
| |
| if (max_encoded_size > DIAG_MAX_HDLC_BUF_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: %pK 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 %pK 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 %pK 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; |
| |
| if (!buf || len <= 0 || len > CALLBACK_BUF_SIZE) { |
| pr_err_ratelimited("diag: In %s, invalid buf %pK 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, |
| (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)); |
| ret = diag_process_apps_pkt(user_space_data, len, |
| current->tgid); |
| if (ret == 1) |
| diag_send_error_rsp((void *)(user_space_data), len, |
| current->tgid); |
| } |
| 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 %pK 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) { |
| mutex_lock(&driver->md_session_lock); |
| 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); |
| mutex_unlock(&driver->md_session_lock); |
| return -EINVAL; |
| } |
| if (session_info) |
| hdlc_disabled = session_info->hdlc_disabled; |
| else |
| hdlc_disabled = driver->hdlc_disabled; |
| mutex_unlock(&driver->md_session_lock); |
| if (!hdlc_disabled) |
| diag_process_hdlc_pkt((void *) |
| (driver->user_space_data_buf), |
| len, current->tgid); |
| else |
| diag_process_non_hdlc_pkt((char *) |
| (driver->user_space_data_buf), |
| len, current->tgid); |
| 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; |
| uint8_t hdlc_disabled; |
| |
| if (!buf || len <= 0 || len > DIAG_MAX_RSP_SIZE) { |
| pr_err_ratelimited("diag: In %s, invalid buf %pK 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); |
| hdlc_disabled = driver->p_hdlc_disabled[APPS_DATA]; |
| 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; |
| |
| mutex_lock(&driver->diagchar_mutex); |
| for (i = 0; i < driver->num_clients; i++) |
| if (driver->client_map[i].pid == current->tgid) |
| index = i; |
| mutex_unlock(&driver->diagchar_mutex); |
| |
| 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, |
| atomic_read(&driver->data_ready_notif[index]) > 0); |
| |
| mutex_lock(&driver->diagchar_mutex); |
| |
| if ((driver->data_ready[index] & USER_SPACE_DATA_TYPE) && |
| (driver->logging_mode == DIAG_MEMORY_DEVICE_MODE || |
| driver->logging_mode == DIAG_MULTI_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; |
| atomic_dec(&driver->data_ready_notif[index]); |
| COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(int)); |
| if (ret == -EFAULT) |
| goto exit; |
| /* place holder for number of data field */ |
| ret += sizeof(int); |
| mutex_lock(&driver->md_session_lock); |
| session_info = diag_md_session_get_pid(current->tgid); |
| exit_stat = diag_md_copy_to_user(buf, &ret, count, |
| session_info); |
| mutex_unlock(&driver->md_session_lock); |
| 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; |
| atomic_dec(&driver->data_ready_notif[index]); |
| } |
| |
| if (driver->data_ready[index] & HDLC_SUPPORT_TYPE) { |
| data_type = driver->data_ready[index] & HDLC_SUPPORT_TYPE; |
| driver->data_ready[index] ^= HDLC_SUPPORT_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(int)); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| mutex_lock(&driver->md_session_lock); |
| session_info = diag_md_session_get_pid(current->tgid); |
| if (session_info) { |
| COPY_USER_SPACE_OR_ERR(buf+4, |
| session_info->hdlc_disabled, |
| sizeof(uint8_t)); |
| if (ret == -EFAULT) { |
| mutex_unlock(&driver->md_session_lock); |
| goto exit; |
| } |
| } |
| mutex_unlock(&driver->md_session_lock); |
| 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_ERR(buf, data_type, 4); |
| if (ret == -EFAULT) |
| goto exit; |
| driver->data_ready[index] ^= DEINIT_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| 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; |
| mutex_lock(&driver->md_session_lock); |
| session_info = diag_md_session_get_peripheral(APPS_DATA); |
| COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(int)); |
| if (ret == -EFAULT) { |
| mutex_unlock(&driver->md_session_lock); |
| goto exit; |
| } |
| write_len = diag_copy_to_user_msg_mask(buf + ret, count, |
| session_info); |
| mutex_unlock(&driver->md_session_lock); |
| if (write_len > 0) |
| ret += write_len; |
| driver->data_ready[index] ^= MSG_MASKS_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| 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; |
| mutex_lock(&driver->md_session_lock); |
| session_info = diag_md_session_get_peripheral(APPS_DATA); |
| COPY_USER_SPACE_OR_ERR(buf, data_type, 4); |
| if (ret == -EFAULT) { |
| mutex_unlock(&driver->md_session_lock); |
| goto exit; |
| } |
| if (session_info && session_info->event_mask && |
| session_info->event_mask->ptr) { |
| COPY_USER_SPACE_OR_ERR(buf + sizeof(int), |
| *(session_info->event_mask->ptr), |
| session_info->event_mask->mask_len); |
| if (ret == -EFAULT) { |
| mutex_unlock(&driver->md_session_lock); |
| goto exit; |
| } |
| } else { |
| COPY_USER_SPACE_OR_ERR(buf + sizeof(int), |
| *(event_mask.ptr), |
| event_mask.mask_len); |
| if (ret == -EFAULT) { |
| mutex_unlock(&driver->md_session_lock); |
| goto exit; |
| } |
| } |
| mutex_unlock(&driver->md_session_lock); |
| driver->data_ready[index] ^= EVENT_MASKS_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| 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; |
| mutex_lock(&driver->md_session_lock); |
| session_info = diag_md_session_get_peripheral(APPS_DATA); |
| COPY_USER_SPACE_OR_ERR(buf, data_type, sizeof(int)); |
| if (ret == -EFAULT) { |
| mutex_unlock(&driver->md_session_lock); |
| goto exit; |
| } |
| |
| write_len = diag_copy_to_user_log_mask(buf + ret, count, |
| session_info); |
| mutex_unlock(&driver->md_session_lock); |
| if (write_len > 0) |
| ret += write_len; |
| driver->data_ready[index] ^= LOG_MASKS_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| 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_ERR(buf, data_type, sizeof(data_type)); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| COPY_USER_SPACE_OR_ERR(buf + sizeof(data_type), |
| *(driver->apps_req_buf), |
| driver->apps_req_buf_len); |
| if (ret == -EFAULT) |
| goto exit; |
| driver->data_ready[index] ^= PKT_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| 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_ERR(buf, data_type, 4); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| COPY_USER_SPACE_OR_ERR(buf+4, *(driver->dci_pkt_buf), |
| driver->dci_pkt_length); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| driver->data_ready[index] ^= DCI_PKT_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| 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_ERR(buf, data_type, 4); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| COPY_USER_SPACE_OR_ERR(buf+4, driver->num_dci_client, 4); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| COPY_USER_SPACE_OR_ERR(buf + 8, (dci_ops_tbl[DCI_LOCAL_PROC]. |
| event_mask_composite), DCI_EVENT_MASK_SIZE); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| driver->data_ready[index] ^= DCI_EVENT_MASKS_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| 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_ERR(buf, data_type, 4); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| COPY_USER_SPACE_OR_ERR(buf+4, driver->num_dci_client, 4); |
| if (ret == -EFAULT) |
| goto exit; |
| |
| COPY_USER_SPACE_OR_ERR(buf+8, (dci_ops_tbl[DCI_LOCAL_PROC]. |
| log_mask_composite), DCI_LOG_MASK_SIZE); |
| if (ret == -EFAULT) |
| goto exit; |
| driver->data_ready[index] ^= DCI_LOG_MASKS_TYPE; |
| atomic_dec(&driver->data_ready_notif[index]); |
| goto exit; |
| } |
| |
| exit: |
| if (driver->data_ready[index] & DCI_DATA_TYPE) { |
| data_type = driver->data_ready[index] & DCI_DATA_TYPE; |
| mutex_unlock(&driver->diagchar_mutex); |
| /* Copy the type of data being passed */ |
| mutex_lock(&driver->dci_mutex); |
| 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; |
| atomic_dec(&driver->data_ready_notif[index]); |
| mutex_unlock(&driver->diagchar_mutex); |
| if (exit_stat == 1) { |
| mutex_unlock(&driver->dci_mutex); |
| goto end; |
| } |
| } |
| mutex_unlock(&driver->dci_mutex); |
| goto end; |
| } |
| mutex_unlock(&driver->diagchar_mutex); |
| 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(void) |
| { |
| 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(void) |
| { |
| /* |
| * 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(void) |
| { |
| if (driver->dci_ws.ref_count == 0 && driver->md_ws.ref_count == 0) |
| pm_relax(driver->diag_dev); |
| } |
| |
| #ifdef CONFIG_IPC_LOGGING |
| 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_USERSPACE | 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) { |
| pr_info("diagchar cdev registration failed !\n"); |
| return err; |
| } |
| |
| driver->diagchar_class = class_create(THIS_MODULE, "diag"); |
| |
| if (IS_ERR(driver->diagchar_class)) { |
| pr_err("Error creating diagchar class.\n"); |
| return PTR_ERR(driver->diagchar_class); |
| } |
| |
| 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 ret, i; |
| |
| 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; |
| for (i = 0; i < NUM_UPD; i++) { |
| driver->pd_logging_mode[i] = 0; |
| driver->pd_session_clear[i] = 0; |
| } |
| driver->num_pd_session = 0; |
| 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_notifier_mutex); |
| mutex_init(&driver->diag_file_mutex); |
| mutex_init(&driver->delayed_rsp_mutex); |
| mutex_init(&apps_data_mutex); |
| mutex_init(&driver->msg_mask_lock); |
| mutex_init(&driver->hdlc_recovery_mutex); |
| for (i = 0; i < NUM_PERIPHERALS; i++) { |
| mutex_init(&driver->diagfwd_channel_mutex[i]); |
| driver->diag_id_sent[i] = 0; |
| } |
| 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) { |
| ret = -ENOMEM; |
| 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_remote_init(); |
| if (ret) |
| goto fail; |
| ret = diag_mux_init(); |
| if (ret) |
| goto fail; |
| ret = diagfwd_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 */ |
| ret = alloc_chrdev_region(&dev, driver->minor_start, |
| driver->num, driver->name); |
| if (!ret) { |
| driver->major = MAJOR(dev); |
| driver->minor_start = MINOR(dev); |
| } else { |
| pr_err("diag: Major number not allocated\n"); |
| goto fail; |
| } |
| driver->cdev = cdev_alloc(); |
| ret = diagchar_setup_cdev(dev); |
| if (ret) |
| goto fail; |
| mutex_init(&driver->diag_id_mutex); |
| INIT_LIST_HEAD(&driver->diag_id_list); |
| diag_add_diag_id_to_list(DIAG_ID_APPS, "APPS", APPS_DATA, APPS_DATA); |
| pr_debug("diagchar initialized now"); |
| ret = diagfwd_bridge_init(); |
| if (ret) |
| diagfwd_bridge_exit(); |
| 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 ret; |
| |
| } |
| |
| static void diagchar_exit(void) |
| { |
| pr_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(); |
| pr_info("done diagchar exit\n"); |
| } |
| |
| module_init(diagchar_init); |
| module_exit(diagchar_exit); |