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feat(mbedtls/esp_crypto_shared_gdma): support AXI-DMA in the crypto shared gdma layer

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- In case of AXI-DMA, the DMA descriptors need to be 8 bytes aligned
lldesc_t do not satify this condition thus we need to replace it with
dma_descriptor_t (align(4) and align(8)) in esp_crypto_shared_gdma.

- Added new shared gdma start API that supports the dma_descriptor_t
DMA descriptor.

- Added some generic dma descriptor macros and helper functions

- replace lldesc_t with dma_descriptor_t
This commit is contained in:
harshal.patil
2023-10-12 14:51:04 +05:30
parent 2c570ed53b
commit 83dd60307f
13 changed files with 309 additions and 123 deletions
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components/hal/include/hal/dma_types.h
+20 -1
View File
@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2020-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2020-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -7,6 +7,7 @@
#pragma once
#include <stdint.h>
#include <stddef.h>
#include "esp_assert.h"
#ifdef __cplusplus
@@ -56,6 +57,24 @@ ESP_STATIC_ASSERT(sizeof(dma_descriptor_align8_t) == 16, "dma_descriptor_align8_
#define DMA_DESCRIPTOR_BUFFER_OWNER_DMA (1) /*!< DMA buffer is allowed to be accessed by DMA engine */
#define DMA_DESCRIPTOR_BUFFER_MAX_SIZE (4095) /*!< Maximum size of the buffer that can be attached to descriptor */
#define DMA_DESCRIPTOR_BUFFER_MAX_SIZE_4B_ALIGNED (4095-3) /*!< Maximum size of the buffer that can be attached to descriptor, and aligned to 4B */
#define DMA_DESCRIPTOR_BUFFER_MAX_SIZE_16B_ALIGNED (4095-15) /*!< Maximum size of the buffer that can be attached to descriptor, and aligned to 16B */
// the size field has 12 bits, but 0 not for 4096.
// to avoid possible problem when the size is not word-aligned, we only use 4096-4 per desc.
/** Maximum size of data in the buffer that a DMA descriptor can hold. */
#define DMA_DESCRIPTOR_BUFFER_MAX_SIZE_PER_DESC (4096-4)
/**
* Get the number of DMA descriptors required for a given buffer size.
*
* @param data_size Size to check DMA descriptor number.
* @param max_desc_size Maximum length of each descriptor
* @return Number of DMA descriptors required.
*/
static inline size_t dma_desc_get_required_num(size_t data_size, size_t max_desc_size)
{
return (data_size + max_desc_size - 1) / max_desc_size;
}
#ifdef __cplusplus
}