feat(mdns): support allocating mDNS task from SPIRAM

components/mdns/Kconfig

@@ -61,6 +61,16 @@ menu "mDNS"
         default 0x0 if MDNS_TASK_AFFINITY_CPU0
         default 0x1 if MDNS_TASK_AFFINITY_CPU1
 
+    choice MDNS_TASK_MEMORY_ALLOC_FROM
+        prompt "Select mDNS task create on which type of memory"
+        default MDNS_TASK_CREATE_FROM_INTERNAL
+        config MDNS_TASK_CREATE_FROM_SPIRAM
+            bool "mDNS task creates on the SPIRAM"
+            depends on (SPIRAM_USE_CAPS_ALLOC || SPIRAM_USE_MALLOC)
+        config MDNS_TASK_CREATE_FROM_INTERNAL
+            bool "mDNS task creates on the internal RAM"
+    endchoice
+
     config MDNS_SERVICE_ADD_TIMEOUT_MS
         int "mDNS adding service timeout (ms)"
         range 10 30000

components/mdns/mdns.c

@@ -25,6 +25,8 @@ static void _mdns_browse_finish(mdns_browse_t *browse);
 static void _mdns_browse_add(mdns_browse_t *browse);
 static void _mdns_browse_send(mdns_browse_t *browse, mdns_if_t interface);
 
+static void _mdns_task_free_with_caps(void);
+
 #if CONFIG_ETH_ENABLED && CONFIG_MDNS_PREDEF_NETIF_ETH
 #include "esp_eth.h"
 #endif
@@ -62,6 +64,7 @@ static const char *TAG = "mdns";
 
 static volatile TaskHandle_t _mdns_service_task_handle = NULL;
 static SemaphoreHandle_t _mdns_service_semaphore = NULL;
+StackType_t *_mdns_stack_buffer;
 
 static void _mdns_search_finish_done(void);
 static mdns_search_once_t *_mdns_search_find_from(mdns_search_once_t *search, mdns_name_t *name, uint16_t type, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol);
@@ -5424,8 +5427,8 @@ static void _mdns_service_task(void *pvParameters)
             vTaskDelay(500 * portTICK_PERIOD_MS);
         }
     }
+    _mdns_task_free_with_caps();
     _mdns_service_task_handle = NULL;
-    vTaskDelete(NULL);
 }
 
 static void _mdns_timer_cb(void *arg)
@@ -5462,6 +5465,32 @@ static esp_err_t _mdns_stop_timer(void)
     return err;
 }
 
+static esp_err_t _mdns_task_create_with_caps(void)
+{
+    ESP_LOGI(TAG, "mDNS task will be created from %s", MDNS_TASK_MEMORY_LOG);
+    esp_err_t ret = ESP_OK;
+    static StaticTask_t mdns_task_buffer;
+
+    // Allocate memory for the mDNS task's stack using the MDNS_TASK_MEMORY_CAPS
+    _mdns_stack_buffer = heap_caps_malloc(MDNS_SERVICE_STACK_DEPTH, MDNS_TASK_MEMORY_CAPS);
+    ESP_GOTO_ON_FALSE(_mdns_stack_buffer != NULL, ESP_FAIL, err, TAG, "failed to allocate memory for the mDNS task's stack");
+
+    _mdns_service_task_handle = xTaskCreateStaticPinnedToCore( _mdns_service_task, "mdns", MDNS_SERVICE_STACK_DEPTH, NULL, MDNS_TASK_PRIORITY, _mdns_stack_buffer, &mdns_task_buffer, MDNS_TASK_AFFINITY );
+    ESP_GOTO_ON_FALSE(_mdns_service_task_handle != NULL, ESP_FAIL, err, TAG, "failed to create task for the mDNS");
+
+    return ret;
+
+err:
+    heap_caps_free(_mdns_stack_buffer);
+    return ret;
+}
+
+static void _mdns_task_free_with_caps(void)
+{
+    vTaskDelete(_mdns_service_task_handle);
+    heap_caps_free(_mdns_stack_buffer);
+}
+
 /**
  * @brief  Start the service thread if not running
  *
@@ -5471,30 +5500,35 @@ static esp_err_t _mdns_stop_timer(void)
  */
 static esp_err_t _mdns_service_task_start(void)
 {
+    esp_err_t ret = ESP_OK;
     if (!_mdns_service_semaphore) {
         _mdns_service_semaphore = xSemaphoreCreateMutex();
-        if (!_mdns_service_semaphore) {
+        ESP_RETURN_ON_FALSE(_mdns_service_semaphore != NULL, ESP_FAIL, TAG, "Failed to create the mDNS service lock");
-            return ESP_FAIL;
-        }
     }
     MDNS_SERVICE_LOCK();
-    if (_mdns_start_timer()) {
+    ESP_GOTO_ON_ERROR(_mdns_start_timer(), err, TAG, "Failed to start the mDNS service timer");
-        MDNS_SERVICE_UNLOCK();
+
-        return ESP_FAIL;
-    }
     if (!_mdns_service_task_handle) {
-        xTaskCreatePinnedToCore(_mdns_service_task, "mdns", MDNS_SERVICE_STACK_DEPTH, NULL, MDNS_TASK_PRIORITY,
+        ESP_GOTO_ON_ERROR(_mdns_task_create_with_caps(), err_stop_timer, TAG, "Failed to start the mDNS service task");
-                                (TaskHandle_t *const)(&_mdns_service_task_handle), MDNS_TASK_AFFINITY);
+#ifdef MDNS_ENABLE_DEBUG
-        if (!_mdns_service_task_handle) {
+#if !CONFIG_IDF_TARGET_LINUX
-            _mdns_stop_timer();
+        StackType_t *mdns_debug_stack_buffer;
-            MDNS_SERVICE_UNLOCK();
+        StaticTask_t *mdns_debug_task_buffer;
-            vSemaphoreDelete(_mdns_service_semaphore);
+        xTaskGetStaticBuffers(_mdns_service_task_handle, &mdns_debug_stack_buffer, &mdns_debug_task_buffer);
-            _mdns_service_semaphore = NULL;
+        _mdns_dbg_printf("mdns_debug_stack_buffer:%p mdns_debug_task_buffer:%p\n", mdns_debug_stack_buffer, mdns_debug_task_buffer);
-            return ESP_FAIL;
+#endif // CONFIG_IDF_TARGET_LINUX
-        }
+#endif // MDNS_ENABLE_DEBUG
     }
     MDNS_SERVICE_UNLOCK();
-    return ESP_OK;
+    return ret;
+
+err_stop_timer:
+    _mdns_stop_timer();
+err:
+    MDNS_SERVICE_UNLOCK();
+    vSemaphoreDelete(_mdns_service_semaphore);
+    _mdns_service_semaphore = NULL;
+    return ret;
 }
 
 /**
@@ -5511,7 +5545,7 @@ static esp_err_t _mdns_service_task_stop(void)
         mdns_action_t *a = &action;
         action.type = ACTION_TASK_STOP;
         if (xQueueSend(_mdns_server->action_queue, &a, (TickType_t)0) != pdPASS) {
-            vTaskDelete(_mdns_service_task_handle);
+            _mdns_task_free_with_caps();
             _mdns_service_task_handle = NULL;
         }
         while (_mdns_service_task_handle) {

components/mdns/private_include/mdns_private.h

@@ -21,6 +21,21 @@
 #define _mdns_dbg_printf(...) printf(__VA_ARGS__)
 #endif
 
+#if CONFIG_MDNS_TASK_CREATE_FROM_SPIRAM
+#define MDNS_TASK_MEMORY_CAPS (MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT)
+#define MDNS_TASK_MEMORY_LOG "SPIRAM"
+#endif
+#if CONFIG_MDNS_TASK_CREATE_FROM_INTERNAL
+#define MDNS_TASK_MEMORY_CAPS (MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT)
+#define MDNS_TASK_MEMORY_LOG "internal RAM"
+#endif
+
+// Allocate memory from internal heap as default.
+#ifndef MDNS_TASK_MEMORY_CAPS
+#define MDNS_TASK_MEMORY_CAPS (MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT)
+#define MDNS_TASK_MEMORY_LOG "internal RAM"
+#endif
+
 /** Number of predefined interfaces */
 #ifndef CONFIG_MDNS_PREDEF_NETIF_STA
 #define CONFIG_MDNS_PREDEF_NETIF_STA 0