40a48dd3bb
dma.c defined function plat_swiotlb_setup, which is declared in
bootinfo.h.
Fixes warning:
arch/mips/loongson64/dma.c:25:13: warning: no previous prototype for ‘plat_swiotlb_setup’ [-Wmissing-prototypes]
25 | void __init plat_swiotlb_setup(void)
| ^~~~~~~~~~~~~~~~~~
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
30 lines
843 B
C
30 lines
843 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/dma-direct.h>
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#include <linux/init.h>
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#include <linux/swiotlb.h>
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#include <asm/bootinfo.h>
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#include <boot_param.h>
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dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
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{
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/* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
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* Loongson-3's 48bit address space and embed it into 40bit */
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long nid = (paddr >> 44) & 0x3;
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return ((nid << 44) ^ paddr) | (nid << node_id_offset);
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}
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phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
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{
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/* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
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* Loongson-3's 48bit address space and embed it into 40bit */
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long nid = (daddr >> node_id_offset) & 0x3;
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return ((nid << node_id_offset) ^ daddr) | (nid << 44);
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}
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void __init plat_swiotlb_setup(void)
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{
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swiotlb_init(true, SWIOTLB_VERBOSE);
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}
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