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feat(bt): Frees BLE memory when no longer in use

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It will free libble.a & libbt all txt, data and bss segment memory.
          This memory is combined into one large memory and put into the heap
          pool.
This commit is contained in:
Shen Weilong
2023-08-17 12:13:12 +08:00
parent 55d3bc2d37
commit ea06b047c2
9 changed files with 150 additions and 39 deletions
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3
components/bt/controller/esp32c2/Kconfig.in
View File

@@ -425,3 +425,6 @@ config BT_CTRL_BLE_ADV_REPORT_DISCARD_THRSHOLD
of ADV packets lost in the controller reaches this threshold. It is better to set a larger value.
If you set `BT_CTRL_BLE_ADV_REPORT_DISCARD_THRSHOLD` to a small value or printf every adv lost event, it
may cause adv packets lost more.
config BT_LE_RELEASE_IRAM_SUPPORTED
bool
default y

56
components/bt/controller/esp32c2/bt.c
View File

@@ -156,14 +156,14 @@ extern int ble_txpwr_set(esp_ble_enhanced_power_type_t power_type, uint16_t hand
extern int ble_txpwr_get(esp_ble_enhanced_power_type_t power_type, uint16_t handle);
extern int ble_get_npl_element_info(esp_bt_controller_config_t *cfg, ble_npl_count_info_t * npl_info);
extern void bt_track_pll_cap(void);
extern uint32_t _bt_bss_start;
#if CONFIG_BT_RELEASE_IRAM
extern uint32_t _iram_bt_text_start;
extern uint32_t _bss_bt_end;
#else
extern uint32_t _bt_bss_end;
extern uint32_t _nimble_bss_start;
extern uint32_t _nimble_bss_end;
extern uint32_t _nimble_data_start;
extern uint32_t _nimble_data_end;
extern uint32_t _bt_data_start;
extern uint32_t _bt_data_end;
extern uint32_t _bt_controller_data_start;
#endif
/* Local Function Declaration
*********************************************************************
@@ -832,32 +832,28 @@ esp_err_t esp_bt_mem_release(esp_bt_mode_t mode)
{
intptr_t mem_start, mem_end;
#if CONFIG_BT_RELEASE_IRAM && CONFIG_ESP_SYSTEM_PMP_IDRAM_SPLIT
/* Release Bluetooth text section and merge Bluetooth data, bss & text into a large free heap
* region when esp_bt_mem_release is called, total saving ~21kB or more of IRAM. ESP32-C2 has
* only 3 configurable PMP entries available, rest of them are hard-coded. We cannot split the
* memory into 3 different regions (IRAM, BLE-IRAM, DRAM). So `ESP_SYSTEM_PMP_IDRAM_SPLIT` needs
* to be disabled.
*/
ESP_LOGE(NIMBLE_PORT_LOG_TAG, "`ESP_SYSTEM_PMP_IDRAM_SPLIT` should be disabled!");
assert(0);
#endif // CONFIG_BT_RELEASE_IRAM && CONFIG_ESP_SYSTEM_PMP_IDRAM_SPLIT
if (mode & ESP_BT_MODE_BLE) {
mem_start = (intptr_t)&_bt_bss_start;
#if CONFIG_BT_RELEASE_IRAM
mem_start = (intptr_t)MAP_IRAM_TO_DRAM((intptr_t)&_iram_bt_text_start);
mem_end = (intptr_t)&_bss_bt_end;
#else
mem_start = (intptr_t)&_bt_controller_data_start;
mem_end = (intptr_t)&_bt_bss_end;
#endif // CONFIG_BT_RELEASE_IRAM
if (mem_start != mem_end) {
ESP_LOGD(NIMBLE_PORT_LOG_TAG, "Release BT BSS [0x%08x] - [0x%08x]", mem_start, mem_end);
ESP_ERROR_CHECK(try_heap_caps_add_region(mem_start, mem_end));
}
mem_start = (intptr_t)&_bt_data_start;
mem_end = (intptr_t)&_bt_data_end;
if (mem_start != mem_end) {
ESP_LOGD(NIMBLE_PORT_LOG_TAG, "Release BT Data [0x%08x] - [0x%08x]", mem_start, mem_end);
ESP_ERROR_CHECK(try_heap_caps_add_region(mem_start, mem_end));
}
mem_start = (intptr_t)&_nimble_bss_start;
mem_end = (intptr_t)&_nimble_bss_end;
if (mem_start != mem_end) {
ESP_LOGD(NIMBLE_PORT_LOG_TAG, "Release NimBLE BSS [0x%08x] - [0x%08x]", mem_start, mem_end);
ESP_ERROR_CHECK(try_heap_caps_add_region(mem_start, mem_end));
}
mem_start = (intptr_t)&_nimble_data_start;
mem_end = (intptr_t)&_nimble_data_end;
if (mem_start != mem_end) {
ESP_LOGD(NIMBLE_PORT_LOG_TAG, "Release NimBLE Data [0x%08x] - [0x%08x]", mem_start, mem_end);
ESP_LOGI(NIMBLE_PORT_LOG_TAG, "Release BLE [0x%08x] - [0x%08x], len %d", mem_start,
mem_end, mem_end - mem_start);
ESP_ERROR_CHECK(try_heap_caps_add_region(mem_start, mem_end));
}
}