// SPDX-License-Identifier: GPL-2.0 | |
/* | |
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited | |
*/ | |
#include <linux/acpi.h> | |
#include <linux/dma-direct.h> | |
void acpi_arch_dma_setup(struct device *dev) | |
{ | |
int ret; | |
u64 mask, end; | |
const struct bus_dma_region *map = NULL; | |
ret = acpi_dma_get_range(dev, &map); | |
if (!ret && map) { | |
end = dma_range_map_max(map); | |
mask = DMA_BIT_MASK(ilog2(end) + 1); | |
dev->bus_dma_limit = end; | |
dev->dma_range_map = map; | |
dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask); | |
*dev->dma_mask = min(*dev->dma_mask, mask); | |
} | |
} |