4f810186ab
1. update cv182x/cv183x configuration file 2. update cv181x/cv180x configuration file 3. update clk driver for cvitek 4. update dma driver for cvitek 5. update soc driver for cvitek 6. porting cvitek ion driver from kernel-4.19 7. compatible with riscv Change-Id: Icff9fafe0ebe7d6bab824bbadb952e08bdc66c19
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/cache.h>
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#include <linux/dma-map-ops.h>
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#include <linux/genalloc.h>
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#include <linux/highmem.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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#include <linux/types.h>
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#include <linux/version.h>
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#include <asm/cache.h>
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void arch_dma_prep_coherent(struct page *page, size_t size)
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{
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void *ptr = page_address(page);
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memset(ptr, 0, size);
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dma_wbinv_range(page_to_phys(page), page_to_phys(page) + size);
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}
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static inline void cache_op(phys_addr_t paddr, size_t size,
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void (*fn)(unsigned long start, unsigned long end))
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{
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unsigned long start = (unsigned long)paddr;
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fn(start, start + size);
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}
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void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
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enum dma_data_direction dir)
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{
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switch (dir) {
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case DMA_TO_DEVICE:
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cache_op(paddr, size, dma_wb_range);
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break;
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case DMA_FROM_DEVICE:
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case DMA_BIDIRECTIONAL:
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cache_op(paddr, size, dma_wbinv_range);
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break;
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default:
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BUG();
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}
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}
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EXPORT_SYMBOL_GPL(arch_sync_dma_for_device);
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void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
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enum dma_data_direction dir)
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{
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switch (dir) {
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case DMA_TO_DEVICE:
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return;
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case DMA_FROM_DEVICE:
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case DMA_BIDIRECTIONAL:
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cache_op(paddr, size, dma_wbinv_range);
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break;
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default:
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BUG();
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}
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}
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EXPORT_SYMBOL_GPL(arch_sync_dma_for_cpu);
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pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
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unsigned long attrs)
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{
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if (attrs & DMA_ATTR_WRITE_COMBINE)
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return pgprot_writecombine(prot);
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return pgprot_noncached(prot);
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}
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