| /* |
| * Copyright (c) 2014-2019 The Linux Foundation. All rights reserved. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all |
| * copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /** |
| * DOC: qdf_threads |
| * QCA driver framework (QDF) thread APIs |
| */ |
| |
| /* Include Files */ |
| #include <qdf_threads.h> |
| #include <qdf_types.h> |
| #include <qdf_trace.h> |
| #include <linux/jiffies.h> |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0) |
| #include <linux/sched.h> |
| #else |
| #include <linux/sched/signal.h> |
| #endif /* KERNEL_VERSION(4, 11, 0) */ |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| #include <linux/kthread.h> |
| #include <linux/stacktrace.h> |
| #include <qdf_defer.h> |
| #include <qdf_module.h> |
| |
| /* Function declarations and documenation */ |
| |
| typedef int (*qdf_thread_os_func)(void *data); |
| |
| /** |
| * qdf_sleep() - sleep |
| * @ms_interval : Number of milliseconds to suspend the current thread. |
| * A value of 0 may or may not cause the current thread to yield. |
| * |
| * This function suspends the execution of the current thread |
| * until the specified time out interval elapses. |
| * |
| * Return: none |
| */ |
| void qdf_sleep(uint32_t ms_interval) |
| { |
| if (in_interrupt()) { |
| QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR, |
| "%s cannot be called from interrupt context!!!", |
| __func__); |
| return; |
| } |
| msleep_interruptible(ms_interval); |
| } |
| qdf_export_symbol(qdf_sleep); |
| |
| /** |
| * qdf_sleep_us() - sleep |
| * @us_interval : Number of microseconds to suspend the current thread. |
| * A value of 0 may or may not cause the current thread to yield. |
| * |
| * This function suspends the execution of the current thread |
| * until the specified time out interval elapses. |
| * |
| * Return : none |
| */ |
| void qdf_sleep_us(uint32_t us_interval) |
| { |
| unsigned long timeout = usecs_to_jiffies(us_interval) + 1; |
| |
| if (in_interrupt()) { |
| QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR, |
| "%s cannot be called from interrupt context!!!", |
| __func__); |
| return; |
| } |
| |
| while (timeout && !signal_pending(current)) |
| timeout = schedule_timeout_interruptible(timeout); |
| } |
| qdf_export_symbol(qdf_sleep_us); |
| |
| /** |
| * qdf_busy_wait() - busy wait |
| * @us_interval : Number of microseconds to busy wait. |
| * |
| * This function places the current thread in busy wait until the specified |
| * time out interval elapses. If the interval is greater than 50us on WM, the |
| * behaviour is undefined. |
| * |
| * Return : none |
| */ |
| void qdf_busy_wait(uint32_t us_interval) |
| { |
| udelay(us_interval); |
| } |
| qdf_export_symbol(qdf_busy_wait); |
| |
| #ifdef PF_WAKE_UP_IDLE |
| void qdf_set_wake_up_idle(bool idle) |
| { |
| set_wake_up_idle(idle); |
| } |
| #else |
| void qdf_set_wake_up_idle(bool idle) |
| { |
| } |
| #endif /* PF_WAKE_UP_IDLE */ |
| |
| qdf_export_symbol(qdf_set_wake_up_idle); |
| |
| void qdf_set_user_nice(qdf_thread_t *thread, long nice) |
| { |
| set_user_nice(thread, nice); |
| } |
| qdf_export_symbol(qdf_set_user_nice); |
| |
| qdf_thread_t *qdf_create_thread(int (*thread_handler)(void *data), void *data, |
| const char thread_name[]) |
| { |
| struct task_struct *task; |
| |
| task = kthread_create(thread_handler, data, thread_name); |
| |
| if (IS_ERR(task)) |
| return NULL; |
| |
| return task; |
| } |
| qdf_export_symbol(qdf_create_thread); |
| |
| static uint16_t qdf_thread_id; |
| |
| qdf_thread_t *qdf_thread_run(qdf_thread_func callback, void *context) |
| { |
| struct task_struct *thread; |
| |
| thread = kthread_create((qdf_thread_os_func)callback, context, |
| "qdf %u", qdf_thread_id++); |
| if (IS_ERR(thread)) |
| return NULL; |
| |
| get_task_struct(thread); |
| wake_up_process(thread); |
| |
| return thread; |
| } |
| qdf_export_symbol(qdf_thread_run); |
| |
| QDF_STATUS qdf_thread_join(qdf_thread_t *thread) |
| { |
| QDF_STATUS status; |
| |
| QDF_BUG(thread); |
| |
| status = (QDF_STATUS)kthread_stop(thread); |
| put_task_struct(thread); |
| |
| return status; |
| } |
| qdf_export_symbol(qdf_thread_join); |
| |
| bool qdf_thread_should_stop(void) |
| { |
| return kthread_should_stop(); |
| } |
| qdf_export_symbol(qdf_thread_should_stop); |
| |
| int qdf_wake_up_process(qdf_thread_t *thread) |
| { |
| return wake_up_process(thread); |
| } |
| qdf_export_symbol(qdf_wake_up_process); |
| |
| /* save_stack_trace_tsk() is exported for: |
| * 1) non-arm architectures |
| * 2) arm architectures in kernel versions >=4.14 |
| * 3) backported kernels defining BACKPORTED_EXPORT_SAVE_STACK_TRACE_TSK_ARM |
| */ |
| #if ((defined(WLAN_HOST_ARCH_ARM) && !WLAN_HOST_ARCH_ARM) || \ |
| LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0) || \ |
| defined(BACKPORTED_EXPORT_SAVE_STACK_TRACE_TSK_ARM)) && \ |
| defined(CONFIG_STACKTRACE) && !defined(CONFIG_ARCH_STACKWALK) |
| #define QDF_PRINT_TRACE_COUNT 32 |
| |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5, 2, 0)) |
| void qdf_print_thread_trace(qdf_thread_t *thread) |
| { |
| const int spaces = 4; |
| struct task_struct *task = thread; |
| unsigned long entries[QDF_PRINT_TRACE_COUNT] = {0}; |
| struct stack_trace trace = { |
| .nr_entries = 0, |
| .skip = 0, |
| .entries = &entries[0], |
| .max_entries = QDF_PRINT_TRACE_COUNT, |
| }; |
| |
| save_stack_trace_tsk(task, &trace); |
| stack_trace_print(entries, trace.nr_entries, spaces); |
| } |
| #else |
| void qdf_print_thread_trace(qdf_thread_t *thread) |
| { |
| const int spaces = 4; |
| struct task_struct *task = thread; |
| unsigned long entries[QDF_PRINT_TRACE_COUNT] = {0}; |
| struct stack_trace trace = { |
| .nr_entries = 0, |
| .skip = 0, |
| .entries = &entries[0], |
| .max_entries = QDF_PRINT_TRACE_COUNT, |
| }; |
| |
| save_stack_trace_tsk(task, &trace); |
| print_stack_trace(&trace, spaces); |
| } |
| #endif |
| |
| #else |
| void qdf_print_thread_trace(qdf_thread_t *thread) { } |
| #endif /* KERNEL_VERSION(4, 14, 0) */ |
| qdf_export_symbol(qdf_print_thread_trace); |
| |
| qdf_thread_t *qdf_get_current_task(void) |
| { |
| return current; |
| } |
| qdf_export_symbol(qdf_get_current_task); |
| |
| int qdf_get_current_pid(void) |
| { |
| return current->pid; |
| } |
| qdf_export_symbol(qdf_get_current_pid); |
| |
| const char *qdf_get_current_comm(void) |
| { |
| return current->comm; |
| } |
| qdf_export_symbol(qdf_get_current_comm); |
| |
| void |
| qdf_thread_set_cpus_allowed_mask(qdf_thread_t *thread, qdf_cpu_mask *new_mask) |
| { |
| set_cpus_allowed_ptr(thread, new_mask); |
| } |
| |
| qdf_export_symbol(qdf_thread_set_cpus_allowed_mask); |
| |
| void qdf_cpumask_clear(qdf_cpu_mask *dstp) |
| { |
| cpumask_clear(dstp); |
| } |
| |
| qdf_export_symbol(qdf_cpumask_clear); |
| |
| void qdf_cpumask_set_cpu(unsigned int cpu, qdf_cpu_mask *dstp) |
| { |
| cpumask_set_cpu(cpu, dstp); |
| } |
| |
| qdf_export_symbol(qdf_cpumask_set_cpu); |
| |
| void qdf_cpumask_setall(qdf_cpu_mask *dstp) |
| { |
| cpumask_setall(dstp); |
| } |
| |
| qdf_export_symbol(qdf_cpumask_setall); |