Commit 21890647 authored by Catalin Marinas's avatar Catalin Marinas
Browse files

arm64: Implement set_arch_dma_coherent_ops() to replace bus notifiers

Commit 6ecba8eb

 (arm64: Use bus notifiers to set per-device coherent
DMA ops) introduced bus notifiers to set the coherent dma ops based on
the 'dma-coherent' DT property. Since the generic of_dma_configure()
handles this property for platform and AMBA devices, replace the
notifiers with set_arch_dma_coherent_ops().
Signed-off-by: default avatarCatalin Marinas <>
parent c9d571be
......@@ -52,6 +52,13 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
dev->archdata.dma_ops = ops;
static inline int set_arch_dma_coherent_ops(struct device *dev)
set_dma_ops(dev, &coherent_swiotlb_dma_ops);
return 0;
#define set_arch_dma_coherent_ops set_arch_dma_coherent_ops
#include <asm-generic/dma-mapping-common.h>
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
......@@ -22,11 +22,8 @@
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/dma-contiguous.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/vmalloc.h>
#include <linux/swiotlb.h>
#include <linux/amba/bus.h>
#include <asm/cacheflush.h>
......@@ -308,40 +305,12 @@ struct dma_map_ops coherent_swiotlb_dma_ops = {
static int dma_bus_notifier(struct notifier_block *nb,
unsigned long event, void *_dev)
struct device *dev = _dev;
if (of_property_read_bool(dev->of_node, "dma-coherent"))
set_dma_ops(dev, &coherent_swiotlb_dma_ops);
return NOTIFY_OK;
static struct notifier_block platform_bus_nb = {
.notifier_call = dma_bus_notifier,
static struct notifier_block amba_bus_nb = {
.notifier_call = dma_bus_notifier,
extern int swiotlb_late_init_with_default_size(size_t default_size);
static int __init swiotlb_late_init(void)
size_t swiotlb_size = min(SZ_64M, MAX_ORDER_NR_PAGES << PAGE_SHIFT);
* These must be registered before of_platform_populate().
bus_register_notifier(&platform_bus_type, &platform_bus_nb);
bus_register_notifier(&amba_bustype, &amba_bus_nb);
dma_ops = &noncoherent_swiotlb_dma_ops;
return swiotlb_late_init_with_default_size(swiotlb_size);
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment