gdma: dynamic alloc DMA channels

components/soc/esp32c3/include/soc/gdma_caps.h

@@ -14,4 +14,5 @@
 
 #pragma once
 
-#define SOC_GDMA_CHANNELS_NUM (3)       /*!< GDMA has 3 TX and 3 RX */
+#define SOC_GDMA_GROUPS          (1)
+#define SOC_GDMA_PAIRS_PER_GROUP (3)

components/soc/esp32c3/include/soc/gdma_channel.h

@@ -0,0 +1,24 @@
+// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+// The following macros have a format SOC_[periph][instance_id] to make it work with `GDMA_MAKE_TRIGGER`
+#define SOC_GDMA_TRIG_PERIPH_M2M0    (-1)
+#define SOC_GDMA_TRIG_PERIPH_SPI2    (0)
+#define SOC_GDMA_TRIG_PERIPH_UART0   (2)
+#define SOC_GDMA_TRIG_PERIPH_I2S0    (3)
+#define SOC_GDMA_TRIG_PERIPH_AES0    (6)
+#define SOC_GDMA_TRIG_PERIPH_SHA0    (7)
+#define SOC_GDMA_TRIG_PERIPH_ADC0    (8)

components/soc/esp32c3/include/soc/soc_caps.h

@@ -12,7 +12,6 @@
 // Attention: These fixed DMA channels are temporarily workaround before we have a centralized DMA controller API to help alloc the channel dynamically
 // Remove them when GDMA driver API is ready
 #define SOC_GDMA_AES_DMA_CHANNEL    (0)
-#define SOC_GDMA_M2M_DMA_CHANNEL    (0)
 #define SOC_GDMA_SHA_DMA_CHANNEL    (1)
 #define SOC_GDMA_SPI2_DMA_CHANNEL   (2)
 #define SOC_GDMA_ADC_DMA_CHANNEL    (0)