Re: [PATCH 06/34] powerpc/dma: split the two __dma_alloc_coherent implementations
ping?
On Wed, Nov 14, 2018 at 09:22:46AM +0100, Christoph Hellwig wrote:
> The implemementation for the CONFIG_NOT_COHERENT_CACHE case doesn't share
> any code with the one for systems with coherent caches. Split it off
> and merge it with the helpers in dma-noncoherent.c that have no other
> callers.
>
> Signed-off-by: Christoph Hellwig
> Acked-by: Benjamin Herrenschmidt
> ---
> arch/powerpc/include/asm/dma-mapping.h | 5 -
> arch/powerpc/kernel/dma.c | 14 ++
> arch/powerpc/mm/dma-noncoherent.c | 15 +++
> arch/powerpc/platforms/44x/warp.c | 2 +-
> 4 files changed, 10 insertions(+), 26 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/dma-mapping.h
> b/arch/powerpc/include/asm/dma-mapping.h
> index f2a4a7142b1e..dacd0f93f2b2 100644
> --- a/arch/powerpc/include/asm/dma-mapping.h
> +++ b/arch/powerpc/include/asm/dma-mapping.h
> @@ -39,9 +39,6 @@ extern int dma_nommu_mmap_coherent(struct device *dev,
> * to ensure it is consistent.
> */
> struct device;
> -extern void *__dma_alloc_coherent(struct device *dev, size_t size,
> - dma_addr_t *handle, gfp_t gfp);
> -extern void __dma_free_coherent(size_t size, void *vaddr);
> extern void __dma_sync(void *vaddr, size_t size, int direction);
> extern void __dma_sync_page(struct page *page, unsigned long offset,
>size_t size, int direction);
> @@ -52,8 +49,6 @@ extern unsigned long __dma_get_coherent_pfn(unsigned long
> cpu_addr);
> * Cache coherent cores.
> */
>
> -#define __dma_alloc_coherent(dev, gfp, size, handle) NULL
> -#define __dma_free_coherent(size, addr) ((void)0)
> #define __dma_sync(addr, size, rw) ((void)0)
> #define __dma_sync_page(pg, off, sz, rw) ((void)0)
>
> diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
> index 6551685a4ed0..d6deb458bb91 100644
> --- a/arch/powerpc/kernel/dma.c
> +++ b/arch/powerpc/kernel/dma.c
> @@ -62,18 +62,12 @@ static int dma_nommu_dma_supported(struct device *dev,
> u64 mask)
> #endif
> }
>
> +#ifndef CONFIG_NOT_COHERENT_CACHE
> void *__dma_nommu_alloc_coherent(struct device *dev, size_t size,
> dma_addr_t *dma_handle, gfp_t flag,
> unsigned long attrs)
> {
> void *ret;
> -#ifdef CONFIG_NOT_COHERENT_CACHE
> - ret = __dma_alloc_coherent(dev, size, dma_handle, flag);
> - if (ret == NULL)
> - return NULL;
> - *dma_handle += get_dma_offset(dev);
> - return ret;
> -#else
> struct page *page;
> int node = dev_to_node(dev);
> #ifdef CONFIG_FSL_SOC
> @@ -110,19 +104,15 @@ void *__dma_nommu_alloc_coherent(struct device *dev,
> size_t size,
> *dma_handle = __pa(ret) + get_dma_offset(dev);
>
> return ret;
> -#endif
> }
>
> void __dma_nommu_free_coherent(struct device *dev, size_t size,
> void *vaddr, dma_addr_t dma_handle,
> unsigned long attrs)
> {
> -#ifdef CONFIG_NOT_COHERENT_CACHE
> - __dma_free_coherent(size, vaddr);
> -#else
> free_pages((unsigned long)vaddr, get_order(size));
> -#endif
> }
> +#endif /* !CONFIG_NOT_COHERENT_CACHE */
>
> static void *dma_nommu_alloc_coherent(struct device *dev, size_t size,
> dma_addr_t *dma_handle, gfp_t flag,
> diff --git a/arch/powerpc/mm/dma-noncoherent.c
> b/arch/powerpc/mm/dma-noncoherent.c
> index b6e7b5952ab5..e955539686a4 100644
> --- a/arch/powerpc/mm/dma-noncoherent.c
> +++ b/arch/powerpc/mm/dma-noncoherent.c
> @@ -29,7 +29,7 @@
> #include
> #include
> #include
> -#include
> +#include
> #include
>
> #include
> @@ -151,8 +151,8 @@ static struct ppc_vm_region *ppc_vm_region_find(struct
> ppc_vm_region *head, unsi
> * Allocate DMA-coherent memory space and return both the kernel remapped
> * virtual and bus address for that space.
> */
> -void *
> -__dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle,
> gfp_t gfp)
> +void *__dma_nommu_alloc_coherent(struct device *dev, size_t size,
> + dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
> {
> struct page *page;
> struct ppc_vm_region *c;
> @@ -223,7 +223,7 @@ __dma_alloc_coherent(struct device *dev, size_t size,
> dma_addr_t *handle, gfp_t
> /*
>* Set the "dma handle"
>*/
> - *handle = page_to_phys(page);
> + *dma_handle = phys_to_dma(dev, page_to_phys(page));
>
> do {
> SetPageReserved(page);
> @@ -249,12 +249,12 @@ __dma_alloc_coherent(struct device *dev, size_t size,
> dma_addr_t *handle, gfp_t
> no_page:
> return NULL;
> }
> -EXPORT_SYMBOL(__dma_alloc_coherent);
>
> /*
> * free a page as defined by the above mapping.
> */
> -void __dma_free_coherent(size_t size, void *vaddr)
> +void
[PATCH 06/34] powerpc/dma: split the two __dma_alloc_coherent implementations
The implemementation for the CONFIG_NOT_COHERENT_CACHE case doesn't share
any code with the one for systems with coherent caches. Split it off
and merge it with the helpers in dma-noncoherent.c that have no other
callers.
Signed-off-by: Christoph Hellwig
Acked-by: Benjamin Herrenschmidt
---
arch/powerpc/include/asm/dma-mapping.h | 5 -
arch/powerpc/kernel/dma.c | 14 ++
arch/powerpc/mm/dma-noncoherent.c | 15 +++
arch/powerpc/platforms/44x/warp.c | 2 +-
4 files changed, 10 insertions(+), 26 deletions(-)
diff --git a/arch/powerpc/include/asm/dma-mapping.h
b/arch/powerpc/include/asm/dma-mapping.h
index f2a4a7142b1e..dacd0f93f2b2 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -39,9 +39,6 @@ extern int dma_nommu_mmap_coherent(struct device *dev,
* to ensure it is consistent.
*/
struct device;
-extern void *__dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *handle, gfp_t gfp);
-extern void __dma_free_coherent(size_t size, void *vaddr);
extern void __dma_sync(void *vaddr, size_t size, int direction);
extern void __dma_sync_page(struct page *page, unsigned long offset,
size_t size, int direction);
@@ -52,8 +49,6 @@ extern unsigned long __dma_get_coherent_pfn(unsigned long
cpu_addr);
* Cache coherent cores.
*/
-#define __dma_alloc_coherent(dev, gfp, size, handle) NULL
-#define __dma_free_coherent(size, addr)((void)0)
#define __dma_sync(addr, size, rw) ((void)0)
#define __dma_sync_page(pg, off, sz, rw) ((void)0)
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index 6551685a4ed0..d6deb458bb91 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -62,18 +62,12 @@ static int dma_nommu_dma_supported(struct device *dev, u64
mask)
#endif
}
+#ifndef CONFIG_NOT_COHERENT_CACHE
void *__dma_nommu_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag,
unsigned long attrs)
{
void *ret;
-#ifdef CONFIG_NOT_COHERENT_CACHE
- ret = __dma_alloc_coherent(dev, size, dma_handle, flag);
- if (ret == NULL)
- return NULL;
- *dma_handle += get_dma_offset(dev);
- return ret;
-#else
struct page *page;
int node = dev_to_node(dev);
#ifdef CONFIG_FSL_SOC
@@ -110,19 +104,15 @@ void *__dma_nommu_alloc_coherent(struct device *dev,
size_t size,
*dma_handle = __pa(ret) + get_dma_offset(dev);
return ret;
-#endif
}
void __dma_nommu_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle,
unsigned long attrs)
{
-#ifdef CONFIG_NOT_COHERENT_CACHE
- __dma_free_coherent(size, vaddr);
-#else
free_pages((unsigned long)vaddr, get_order(size));
-#endif
}
+#endif /* !CONFIG_NOT_COHERENT_CACHE */
static void *dma_nommu_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag,
diff --git a/arch/powerpc/mm/dma-noncoherent.c
b/arch/powerpc/mm/dma-noncoherent.c
index b6e7b5952ab5..e955539686a4 100644
--- a/arch/powerpc/mm/dma-noncoherent.c
+++ b/arch/powerpc/mm/dma-noncoherent.c
@@ -29,7 +29,7 @@
#include
#include
#include
-#include
+#include
#include
#include
@@ -151,8 +151,8 @@ static struct ppc_vm_region *ppc_vm_region_find(struct
ppc_vm_region *head, unsi
* Allocate DMA-coherent memory space and return both the kernel remapped
* virtual and bus address for that space.
*/
-void *
-__dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle,
gfp_t gfp)
+void *__dma_nommu_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
struct page *page;
struct ppc_vm_region *c;
@@ -223,7 +223,7 @@ __dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t
/*
* Set the "dma handle"
*/
- *handle = page_to_phys(page);
+ *dma_handle = phys_to_dma(dev, page_to_phys(page));
do {
SetPageReserved(page);
@@ -249,12 +249,12 @@ __dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t
no_page:
return NULL;
}
-EXPORT_SYMBOL(__dma_alloc_coherent);
/*
* free a page as defined by the above mapping.
*/
-void __dma_free_coherent(size_t size, void *vaddr)
+void __dma_nommu_free_coherent(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, unsigned long attrs)
{
struct ppc_vm_region *c;
unsigned long flags, addr;
@@ -309,7 +309,6 @@ void __dma_free_coherent(size_t size, void *vaddr)
__func__,
