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fix(dma): also consider buffer alignment when calculating the DMA nodes

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Closes https://github.com/espressif/esp-idf/issues/15228
This commit is contained in:
morris
2025-01-24 18:02:57 +08:00
parent 489d7a2b3a
commit 1536b00d75
8 changed files with 66 additions and 37 deletions
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10
components/esp_hw_support/dma/esp_dma_utils.c
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@@ -126,6 +126,16 @@ esp_err_t esp_dma_merge_aligned_rx_buffers(dma_buffer_split_array_t *align_array
return ESP_OK;
}
size_t esp_dma_calculate_node_count(size_t buffer_size, size_t buffer_alignment, size_t max_buffer_size_per_node)
{
// buffer_alignment should be power of 2
ESP_RETURN_ON_FALSE(buffer_alignment && ((buffer_alignment & (buffer_alignment - 1)) == 0), 0, TAG, "invalid buffer alignment");
// align down the max_buffer_size_per_node
max_buffer_size_per_node = max_buffer_size_per_node & ~(buffer_alignment - 1);
// calculate the number of nodes
return (buffer_size + max_buffer_size_per_node - 1) / max_buffer_size_per_node;
}
esp_err_t esp_dma_capable_malloc(size_t size, const esp_dma_mem_info_t *dma_mem_info, void **out_ptr, size_t *actual_size)
{
ESP_RETURN_ON_FALSE_ISR(dma_mem_info && out_ptr, ESP_ERR_INVALID_ARG, TAG, "null pointer");