arch/risc-v: register Wi-Fi IRQs in non_iram mask for SPI flash

Wi-Fi used a locally allocated vector_desc, so those CPU interrupt lines
were never recorded in the HAL non_iram_int_mask.
During SPI flash, esp_intr_noniram_disable() therefore did not mask them,
and Wi-Fi ISRs could still run with the cache off.
Now, Wi-Fi IRQs are treated as non-IRAM and get masked while flash/cache is suspended.

Signed-off-by: Filipe Cavalcanti <filipe.cavalcanti@espressif.com>

arch/risc-v/src/esp32c3/esp_wifi_adapter.c

@@ -40,6 +40,7 @@
 #include "esp_hr_timer.h"
 
 #include "esp_log.h"
+#include "esp_intr_alloc.h"
 #include "esp_mac.h"
 #include "esp_random.h"
 #include "esp_private/wifi_os_adapter.h"
@@ -85,6 +86,12 @@ struct vector_desc_t
   vector_desc_t *next;
 };
 
+/* From esp_hw_support/intr_alloc.c: returns a pointer to a HAL-owned
+ * vector descriptor for some intno and cpu.
+ */
+
+extern vector_desc_t *get_desc_for_int(int intno, int cpu);
+
 /****************************************************************************
  * Private Function Prototypes
  ****************************************************************************/
@@ -532,7 +539,9 @@ static void wifi_delete_queue_wrapper(void *queue)
  * Name: set_intr_wrapper
  *
  * Description:
- *   Do nothing
+ *   Route the Wi-Fi interrupt source and attach a handle that uses the HAL
+ *   global vector descriptor list. Mark the CPU line as non-IRAM so
+ *   esp_intr_noniram_disable() masks it while SPI flash holds the cache off.
  *
  * Input Parameters:
  *     cpu_no      - The CPU which the interrupt number belongs.
@@ -550,6 +559,7 @@ static void set_intr_wrapper(int32_t cpu_no, uint32_t intr_source,
 {
   intr_handle_t handle;
   int irq = ESP_SOURCE2IRQ(intr_source);
+  esp_err_t err;
 
   wlinfo("cpu_no=%" PRId32 ", intr_source=%" PRIu32
          ", intr_num=%" PRIu32 ", intr_prio=%" PRId32 "\n",
@@ -566,22 +576,24 @@ static void set_intr_wrapper(int32_t cpu_no, uint32_t intr_source,
       return;
     }
 
-  handle->vector_desc = kmm_calloc(1, sizeof(vector_desc_t));
+  handle->vector_desc = get_desc_for_int(intr_num, cpu_no);
   if (handle->vector_desc == NULL)
     {
-      wlerr("Failed to kmm_calloc\n");
+      wlerr("get_desc_for_int failed\n");
       kmm_free(handle);
       return;
     }
 
-  handle->vector_desc->intno = intr_num;
-  handle->vector_desc->cpu = cpu_no;
   handle->vector_desc->source = intr_source;
-  handle->vector_desc->shared_vec_info = NULL;
-  handle->vector_desc->next = NULL;
   handle->shared_vector_desc = NULL;
 
   esp_set_handle(cpu_no, irq, handle);
+
+  err = esp_intr_set_in_iram(handle, false);
+  if (err != ESP_OK)
+    {
+      wlerr("esp_intr_set_in_iram failed: %d\n", err);
+    }
 }
 
 /****************************************************************************

arch/risc-v/src/esp32c6/esp_wifi_adapter.c

@@ -121,6 +121,12 @@ struct vector_desc_t
   vector_desc_t *next;
 };
 
+/* From esp_hw_support/intr_alloc.c: returns a pointer to a HAL-owned
+ * vector descriptor for some intno and cpu.
+ */
+
+extern vector_desc_t *get_desc_for_int(int intno, int cpu);
+
 /****************************************************************************
  * Private Function Prototypes
  ****************************************************************************/
@@ -566,7 +572,9 @@ static void wifi_delete_queue_wrapper(void *queue)
  * Name: set_intr_wrapper
  *
  * Description:
- *   Do nothing
+ *   Route the Wi-Fi interrupt source and attach a handle that uses the HAL
+ *   global vector descriptor list. Mark the CPU line as non-IRAM so
+ *   esp_intr_noniram_disable() masks it while SPI flash holds the cache off.
  *
  * Input Parameters:
  *     cpu_no      - The CPU which the interrupt number belongs.
@@ -584,6 +592,7 @@ static void set_intr_wrapper(int32_t cpu_no, uint32_t intr_source,
 {
   intr_handle_t handle;
   int irq = ESP_SOURCE2IRQ(intr_source);
+  esp_err_t err;
 
   wlinfo("cpu_no=%" PRId32 ", intr_source=%" PRIu32
          ", intr_num=%" PRIu32 ", intr_prio=%" PRId32 "\n",
@@ -600,22 +609,24 @@ static void set_intr_wrapper(int32_t cpu_no, uint32_t intr_source,
       return;
     }
 
-  handle->vector_desc = kmm_calloc(1, sizeof(vector_desc_t));
+  handle->vector_desc = get_desc_for_int(intr_num, cpu_no);
   if (handle->vector_desc == NULL)
     {
-      wlerr("Failed to kmm_calloc\n");
+      wlerr("get_desc_for_int failed\n");
       kmm_free(handle);
       return;
     }
 
-  handle->vector_desc->intno = intr_num;
-  handle->vector_desc->cpu = cpu_no;
   handle->vector_desc->source = intr_source;
-  handle->vector_desc->shared_vec_info = NULL;
-  handle->vector_desc->next = NULL;
   handle->shared_vector_desc = NULL;
 
   esp_set_handle(cpu_no, irq, handle);
+
+  err = esp_intr_set_in_iram(handle, false);
+  if (err != ESP_OK)
+    {
+      wlerr("esp_intr_set_in_iram failed: %d\n", err);
+    }
 }
 
 /****************************************************************************