Merge branch 'fix/avoid_extra_c2m_msync_in_aes_driver_v5.3' into 'release/v5.3'

fix(mbedtls/aes): Avoid extra C2M sync of memory (v5.3)

See merge request espressif/esp-idf!32699

Author: AdityaHPatwardhan

components/mbedtls/port/aes/dma/esp_aes_dma_core.c

@@ -325,7 +325,7 @@ static inline void *aes_dma_calloc(size_t num, size_t size, uint32_t caps, size_
     return heap_caps_aligned_calloc(DMA_DESC_MEM_ALIGN_SIZE, num, size, caps | MALLOC_CAP_DMA | MALLOC_CAP_8BIT);
 }
 
-static inline esp_err_t dma_desc_link(crypto_dma_desc_t *dmadesc, size_t crypto_dma_desc_num, size_t cache_line_size)
+static inline esp_err_t dma_desc_link(crypto_dma_desc_t *dmadesc, size_t crypto_dma_desc_num)
 {
     esp_err_t ret = ESP_OK;
     for (int i = 0; i < crypto_dma_desc_num; i++) {
@@ -334,7 +334,8 @@ static inline esp_err_t dma_desc_link(crypto_dma_desc_t *dmadesc, size_t crypto_
 #if SOC_CACHE_INTERNAL_MEM_VIA_L1CACHE
         /*  Write back both input buffers and output buffers to clear any cache dirty bit if set
             If we want to remove `ESP_CACHE_MSYNC_FLAG_UNALIGNED` aligned flag then we need to pass
-            cache msync size = ALIGN_UP(dma_desc.size, cache_line_size), instead of dma_desc.size
+            cache msync size = ALIGN_UP(dma_desc.size, cache_line_size), where cache_line_size is the
+            the cache line size coressponding to the buffer that is being synced, instead of dma_desc.size
             Keeping the `ESP_CACHE_MSYNC_FLAG_UNALIGNED` flag just because it should not look like
             we are syncing extra bytes due to ALIGN_UP'ed size but just the number of bytes that
             are needed in the operation. */
@@ -343,7 +344,7 @@ static inline esp_err_t dma_desc_link(crypto_dma_desc_t *dmadesc, size_t crypto_
             return ret;
         }
     }
-    ret = esp_cache_msync(dmadesc, ALIGN_UP(crypto_dma_desc_num * sizeof(crypto_dma_desc_t), cache_line_size), ESP_CACHE_MSYNC_FLAG_DIR_C2M);
+    ret = esp_cache_msync(dmadesc, crypto_dma_desc_num * sizeof(crypto_dma_desc_t), ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
 #else
     }
 #endif
@@ -470,7 +471,7 @@ static esp_err_t generate_descriptor_list(const uint8_t *buffer, const size_t le
         populated_dma_descs += (unaligned_end_bytes ? 1 : 0);
     }
 
-    if (dma_desc_link(dma_descriptors, dma_descs_needed, cache_line_size) != ESP_OK) {
+    if (dma_desc_link(dma_descriptors, dma_descs_needed) != ESP_OK) {
         ESP_LOGE(TAG, "DMA descriptors cache sync C2M failed");
         return ESP_FAIL;
     }