From 10ebd8556b7990499c896a550e3d416b444211e6 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 02:23:07 +0000
Subject: [PATCH] add led
---
kernel/arch/arm/include/asm/dma-mapping.h | 95 +----------------------------------------------
1 files changed, 3 insertions(+), 92 deletions(-)
diff --git a/kernel/arch/arm/include/asm/dma-mapping.h b/kernel/arch/arm/include/asm/dma-mapping.h
index 8436f6a..7708224 100644
--- a/kernel/arch/arm/include/asm/dma-mapping.h
+++ b/kernel/arch/arm/include/asm/dma-mapping.h
@@ -6,9 +6,6 @@
#include <linux/mm_types.h>
#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
-
-#include <asm/memory.h>
#include <xen/xen.h>
#include <asm/xen/hypervisor.h>
@@ -18,95 +15,9 @@
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
- return IS_ENABLED(CONFIG_MMU) ? &arm_dma_ops : &dma_direct_ops;
-}
-
-#ifdef __arch_page_to_dma
-#error Please update to __arch_pfn_to_dma
-#endif
-
-/*
- * dma_to_pfn/pfn_to_dma/dma_to_virt/virt_to_dma are architecture private
- * functions used internally by the DMA-mapping API to provide DMA
- * addresses. They must not be used by drivers.
- */
-#ifndef __arch_pfn_to_dma
-static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn)
-{
- if (dev)
- pfn -= dev->dma_pfn_offset;
- return (dma_addr_t)__pfn_to_bus(pfn);
-}
-
-static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
-{
- unsigned long pfn = __bus_to_pfn(addr);
-
- if (dev)
- pfn += dev->dma_pfn_offset;
-
- return pfn;
-}
-
-static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
-{
- if (dev) {
- unsigned long pfn = dma_to_pfn(dev, addr);
-
- return phys_to_virt(__pfn_to_phys(pfn));
- }
-
- return (void *)__bus_to_virt((unsigned long)addr);
-}
-
-static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
-{
- if (dev)
- return pfn_to_dma(dev, virt_to_pfn(addr));
-
- return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
-}
-
-#else
-static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn)
-{
- return __arch_pfn_to_dma(dev, pfn);
-}
-
-static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
-{
- return __arch_dma_to_pfn(dev, addr);
-}
-
-static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
-{
- return __arch_dma_to_virt(dev, addr);
-}
-
-static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
-{
- return __arch_virt_to_dma(dev, addr);
-}
-#endif
-
-/* The ARM override for dma_max_pfn() */
-static inline unsigned long dma_max_pfn(struct device *dev)
-{
- return dma_to_pfn(dev, *dev->dma_mask);
-}
-#define dma_max_pfn(dev) dma_max_pfn(dev)
-
-#define arch_setup_dma_ops arch_setup_dma_ops
-extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
- const struct iommu_ops *iommu, bool coherent);
-
-#define arch_teardown_dma_ops arch_teardown_dma_ops
-extern void arch_teardown_dma_ops(struct device *dev);
-
-/* do not use this function in a driver */
-static inline bool is_device_dma_coherent(struct device *dev)
-{
- return dev->archdata.dma_coherent;
+ if (IS_ENABLED(CONFIG_MMU) && !IS_ENABLED(CONFIG_ARM_LPAE))
+ return &arm_dma_ops;
+ return NULL;
}
/**
--
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