esp_wifi: Put some rx code to iram

components/esp32/CMakeLists.txt

@@ -77,6 +77,13 @@ else()
         target_link_libraries(esp32 "-L ${CMAKE_CURRENT_SOURCE_DIR}/ld/wifi_iram_noopt")
     endif()
 
+    # Add a different linker search path depending on WiFi RX optimisations
+    if (CONFIG_ESP32_WIFI_RX_IRAM_OPT)
+        target_link_libraries(esp32 "-L ${CMAKE_CURRENT_SOURCE_DIR}/ld/wifi_rx_iram_opt")
+    else()
+        target_link_libraries(esp32 "-L ${CMAKE_CURRENT_SOURCE_DIR}/ld/wifi_rx_iram_noopt")
+    endif()
+
     if(NOT CONFIG_NO_BLOBS)
         target_link_libraries(esp32 coexist core espnow mesh net80211 phy pp rtc smartconfig wpa2 wpa wps)
     endif()

components/esp32/Kconfig

@@ -1098,11 +1098,20 @@ config ESP32_WIFI_SOFTAP_BEACON_MAX_LEN
 
 config ESP32_WIFI_IRAM_OPT
     bool "WiFi IRAM speed optimization"
+    default n if (BT_ENABLED && SPIRAM_SUPPORT)
     default y
     help
         Select this option to place frequently called Wi-Fi library functions in IRAM. When this option is disabled,
         more than 10Kbytes of IRAM memory will be saved but Wi-Fi throughput will be reduced.
 
+config ESP32_WIFI_RX_IRAM_OPT
+    bool "WiFi RX IRAM speed optimization"
+    default n if (BT_ENABLED && SPIRAM_SUPPORT)
+    default y
+    help
+        Select this option to place frequently called Wi-Fi library RX functions in IRAM.When this option is disabled,
+        more than 17Kbytes of IRAM memory will be saved but Wi-Fi performance will be reduced.
+
 config ESP32_WIFI_MGMT_SBUF_NUM
     int "WiFi mgmt short buffer number"
     range 6 32

components/esp32/component.mk

@@ -20,6 +20,13 @@ else
 COMPONENT_ADD_LDFLAGS += -L $(COMPONENT_PATH)/ld/wifi_iram_noopt
 endif
 
+# Add a different linker search path depending on WiFi RX optimisations
+ifdef CONFIG_ESP32_WIFI_RX_IRAM_OPT
+COMPONENT_ADD_LDFLAGS += -L $(COMPONENT_PATH)/ld/wifi_rx_iram_opt
+else
+COMPONENT_ADD_LDFLAGS += -L $(COMPONENT_PATH)/ld/wifi_rx_iram_noopt
+endif
+
 #Force pure functions from libgcc.a to be linked from ROM
 LINKER_SCRIPTS += esp32.rom.libgcc.ld
 

components/esp32/ld/esp32.common.ld

@@ -102,6 +102,7 @@ SECTIONS
     *libesp32.a:panic.*(.literal .text .literal.* .text.*)
     *libesp32.a:core_dump.*(.literal .text .literal.* .text.*)
     INCLUDE wifi_iram.ld
+    INCLUDE wifi_rx_iram.ld
     *libapp_trace.a:(.literal .text .literal.* .text.*)
     *libxtensa-debug-module.a:eri.*(.literal .text .literal.* .text.*)
     *librtc.a:(.literal .text .literal.* .text.*)
@@ -240,6 +241,7 @@ SECTIONS
     *(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
     *(.irom0.text) /* catch stray ICACHE_RODATA_ATTR */
     *(.wifi0iram .wifi0iram.*) /* catch stray WIFI_IRAM_ATTR */
+    *(.wifirxiram .wifirxiram.*) /* catch stray WIFI_RX_IRAM_ATTR */
     *(.fini.literal)
     *(.fini)
     *(.gnu.version)

components/esp32/ld/wifi_rx_iram_noopt/wifi_rx_iram.ld

@@ -0,0 +1,2 @@
+/* This snippet does nothing, if WiFi RX IRAM optimisations
+   are disabled. */

components/esp32/ld/wifi_rx_iram_opt/wifi_rx_iram.ld

@@ -0,0 +1,4 @@
+/* Link WiFi library .wifi0iram sections to IRAM
+   if this snippet is included */
+*libnet80211.a:( .wifirxiram  .wifirxiram.*)
+*libpp.a:( .wifirxiram  .wifirxiram.*)

tools/unit-test-app/configs/psram

@@ -1,2 +1,3 @@
 EXCLUDE_COMPONENTS=libsodium bt
 CONFIG_SPIRAM_SUPPORT=y
+CONFIG_ESP32_WIFI_RX_IRAM_OPT=n