From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/arch/nios2/mm/dma-mapping.c | 38 ++++++++++++--------------------------
1 files changed, 12 insertions(+), 26 deletions(-)
diff --git a/kernel/arch/nios2/mm/dma-mapping.c b/kernel/arch/nios2/mm/dma-mapping.c
index 4af9e5b..fd887d5 100644
--- a/kernel/arch/nios2/mm/dma-mapping.c
+++ b/kernel/arch/nios2/mm/dma-mapping.c
@@ -18,8 +18,8 @@
#include <linux/cache.h>
#include <asm/cacheflush.h>
-void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
- size_t size, enum dma_data_direction dir)
+void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
+ enum dma_data_direction dir)
{
void *vaddr = phys_to_virt(paddr);
@@ -42,8 +42,8 @@
}
}
-void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
- size_t size, enum dma_data_direction dir)
+void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
+ enum dma_data_direction dir)
{
void *vaddr = phys_to_virt(paddr);
@@ -60,32 +60,18 @@
}
}
-void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
- gfp_t gfp, unsigned long attrs)
+void arch_dma_prep_coherent(struct page *page, size_t size)
{
- void *ret;
+ unsigned long start = (unsigned long)page_address(page);
- /* optimized page clearing */
- gfp |= __GFP_ZERO;
-
- if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
- gfp |= GFP_DMA;
-
- ret = (void *) __get_free_pages(gfp, get_order(size));
- if (ret != NULL) {
- *dma_handle = virt_to_phys(ret);
- flush_dcache_range((unsigned long) ret,
- (unsigned long) ret + size);
- ret = UNCAC_ADDR(ret);
- }
-
- return ret;
+ flush_dcache_range(start, start + size);
}
-void arch_dma_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, unsigned long attrs)
+void *arch_dma_set_uncached(void *ptr, size_t size)
{
- unsigned long addr = (unsigned long) CAC_ADDR((unsigned long) vaddr);
+ unsigned long addr = (unsigned long)ptr;
- free_pages(addr, get_order(size));
+ addr |= CONFIG_NIOS2_IO_REGION_BASE;
+
+ return (void *)ptr;
}
--
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