You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
94 lines
2.5 KiB
Diff
94 lines
2.5 KiB
Diff
From 4885eb650b27f5639c8c72b8d4daa37f533b0b4d Mon Sep 17 00:00:00 2001
|
|
From: Yutang Jiang <yutang.jiang@nxp.com>
|
|
Date: Fri, 22 Jul 2016 01:03:29 +0800
|
|
Subject: [PATCH 69/70] Revert "arm64: simplify dma_get_ops"
|
|
|
|
This reverts commit 1dccb598df549d892b6450c261da54cdd7af44b4.
|
|
---
|
|
arch/arm64/include/asm/dma-mapping.h | 13 ++++++++++---
|
|
arch/arm64/mm/dma-mapping.c | 16 ++++++++++++----
|
|
2 files changed, 22 insertions(+), 7 deletions(-)
|
|
|
|
--- a/arch/arm64/include/asm/dma-mapping.h
|
|
+++ b/arch/arm64/include/asm/dma-mapping.h
|
|
@@ -18,6 +18,7 @@
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
+#include <linux/acpi.h>
|
|
#include <linux/types.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
@@ -25,16 +26,22 @@
|
|
#include <asm/xen/hypervisor.h>
|
|
|
|
#define DMA_ERROR_CODE (~(dma_addr_t)0)
|
|
+extern struct dma_map_ops *dma_ops;
|
|
extern struct dma_map_ops dummy_dma_ops;
|
|
|
|
static inline struct dma_map_ops *__generic_dma_ops(struct device *dev)
|
|
{
|
|
- if (dev && dev->archdata.dma_ops)
|
|
+ if (unlikely(!dev))
|
|
+ return dma_ops;
|
|
+ else if (dev->archdata.dma_ops)
|
|
return dev->archdata.dma_ops;
|
|
+ else if (acpi_disabled)
|
|
+ return dma_ops;
|
|
|
|
/*
|
|
- * We expect no ISA devices, and all other DMA masters are expected to
|
|
- * have someone call arch_setup_dma_ops at device creation time.
|
|
+ * When ACPI is enabled, if arch_set_dma_ops is not called,
|
|
+ * we will disable device DMA capability by setting it
|
|
+ * to dummy_dma_ops.
|
|
*/
|
|
return &dummy_dma_ops;
|
|
}
|
|
--- a/arch/arm64/mm/dma-mapping.c
|
|
+++ b/arch/arm64/mm/dma-mapping.c
|
|
@@ -18,7 +18,6 @@
|
|
*/
|
|
|
|
#include <linux/gfp.h>
|
|
-#include <linux/acpi.h>
|
|
#include <linux/export.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/genalloc.h>
|
|
@@ -29,6 +28,9 @@
|
|
|
|
#include <asm/cacheflush.h>
|
|
|
|
+struct dma_map_ops *dma_ops;
|
|
+EXPORT_SYMBOL(dma_ops);
|
|
+
|
|
static pgprot_t __get_dma_pgprot(struct dma_attrs *attrs, pgprot_t prot,
|
|
bool coherent)
|
|
{
|
|
@@ -513,7 +515,13 @@ EXPORT_SYMBOL(dummy_dma_ops);
|
|
|
|
static int __init arm64_dma_init(void)
|
|
{
|
|
- return atomic_pool_init();
|
|
+ int ret;
|
|
+
|
|
+ dma_ops = &swiotlb_dma_ops;
|
|
+
|
|
+ ret = atomic_pool_init();
|
|
+
|
|
+ return ret;
|
|
}
|
|
arch_initcall(arm64_dma_init);
|
|
|
|
@@ -987,8 +995,8 @@ static void __iommu_setup_dma_ops(struct
|
|
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
|
|
struct iommu_ops *iommu, bool coherent)
|
|
{
|
|
- if (!dev->archdata.dma_ops)
|
|
- dev->archdata.dma_ops = &swiotlb_dma_ops;
|
|
+ if (!acpi_disabled && !dev->archdata.dma_ops)
|
|
+ dev->archdata.dma_ops = dma_ops;
|
|
|
|
dev->archdata.dma_coherent = coherent;
|
|
__iommu_setup_dma_ops(dev, dma_base, size, iommu);
|