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fix(spi_flash): Fix stuck during flash operation

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When a task was not pinned to a certain CPU.
This commit is contained in:
KonstantinKondrashov 2023-12-28 16:50:55 +08:00 committed by Konstantin Kondrashov
parent 01902148da
commit 4f03e0241e
1 changed files with 35 additions and 23 deletions
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58
components/spi_flash/cache_utils.c
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@ -48,7 +48,7 @@
#include <soc/soc.h>
#include "sdkconfig.h"
#ifndef CONFIG_FREERTOS_UNICORE
#include "esp_ipc.h"
#include "esp_private/esp_ipc.h"
#endif
#include "esp_attr.h"
#include "esp_memory_utils.h"
@ -157,8 +157,8 @@ void IRAM_ATTR spi_flash_disable_interrupts_caches_and_other_cpu(void)
spi_flash_op_lock();
const int cpuid = xPortGetCoreID();
const uint32_t other_cpuid = (cpuid == 0) ? 1 : 0;
int cpuid = xPortGetCoreID();
uint32_t other_cpuid = (cpuid == 0) ? 1 : 0;
#ifndef NDEBUG
// For sanity check later: record the CPU which has started doing flash operation
assert(s_flash_op_cpu == -1);
@ -173,33 +173,45 @@ void IRAM_ATTR spi_flash_disable_interrupts_caches_and_other_cpu(void)
// esp_intr_noniram_disable.
assert(other_cpuid == 1);
} else {
// Temporarily raise current task priority to prevent a deadlock while
// waiting for IPC task to start on the other CPU
prvTaskSavedPriority_t SavedPriority;
prvTaskPriorityRaise(&SavedPriority, configMAX_PRIORITIES - 1);
bool ipc_call_was_send_to_other_cpu;
do {
#ifdef CONFIG_FREERTOS_SMP
//Note: Scheduler suspension behavior changed in FreeRTOS SMP
vTaskPreemptionDisable(NULL);
#else
// Disable scheduler on the current CPU
vTaskSuspendAll();
#endif // CONFIG_FREERTOS_SMP
// Signal to the spi_flash_op_block_task on the other CPU that we need it to
// disable cache there and block other tasks from executing.
s_flash_op_can_start = false;
ESP_ERROR_CHECK(esp_ipc_call(other_cpuid, &spi_flash_op_block_func, (void *) other_cpuid));
cpuid = xPortGetCoreID();
other_cpuid = (cpuid == 0) ? 1 : 0;
#ifndef NDEBUG
s_flash_op_cpu = cpuid;
#endif
s_flash_op_can_start = false;
ipc_call_was_send_to_other_cpu = esp_ipc_call_nonblocking(other_cpuid, &spi_flash_op_block_func, (void *) other_cpuid) == ESP_OK;
if (!ipc_call_was_send_to_other_cpu) {
// IPC call was not send to other cpu because another nonblocking API is running now.
// Enable the Scheduler again will not help the IPC to speed it up
// but there is a benefit to schedule to a higher priority task before the nonblocking running IPC call is done.
#ifdef CONFIG_FREERTOS_SMP
//Note: Scheduler suspension behavior changed in FreeRTOS SMP
vTaskPreemptionEnable(NULL);
#else
xTaskResumeAll();
#endif // CONFIG_FREERTOS_SMP
}
} while (!ipc_call_was_send_to_other_cpu);
while (!s_flash_op_can_start) {
// Busy loop and wait for spi_flash_op_block_func to disable cache
// on the other CPU
}
#ifdef CONFIG_FREERTOS_SMP
//Note: Scheduler suspension behavior changed in FreeRTOS SMP
vTaskPreemptionDisable(NULL);
#else
// Disable scheduler on the current CPU
vTaskSuspendAll();
#endif // CONFIG_FREERTOS_SMP
// Can now set the priority back to the normal one
prvTaskPriorityRestore(&SavedPriority);
// This is guaranteed to run on CPU <cpuid> because the other CPU is now
// occupied by highest priority task
assert(xPortGetCoreID() == cpuid);
}
// Kill interrupts that aren't located in IRAM
esp_intr_noniram_disable();
// This CPU executes this routine, with non-IRAM interrupts and the scheduler