| Message ID | 20181114082314.8965-7-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [01/34] powerpc: use mm zones more sensibly | expand |
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 <hch@lst.de> > Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> > --- > 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 <linux/string.h> > #include <linux/types.h> > #include <linux/highmem.h> > -#include <linux/dma-mapping.h> > +#include <linux/dma-direct.h> > #include <linux/export.h> > > #include <asm/tlbflush.h> > @@ -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__, vaddr); > dump_stack(); > } > -EXPORT_SYMBOL(__dma_free_coherent); > > /* > * make an area consistent. > @@ -401,7 +400,7 @@ EXPORT_SYMBOL(__dma_sync_page); > > /* > * Return the PFN for a given cpu virtual address returned by > - * __dma_alloc_coherent. This is used by dma_mmap_coherent() > + * __dma_nommu_alloc_coherent. This is used by dma_mmap_coherent() > */ > unsigned long __dma_get_coherent_pfn(unsigned long cpu_addr) > { > diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c > index a886c2c22097..7e4f8ca19ce8 100644 > --- a/arch/powerpc/platforms/44x/warp.c > +++ b/arch/powerpc/platforms/44x/warp.c > @@ -47,7 +47,7 @@ static int __init warp_probe(void) > if (!of_machine_is_compatible("pika,warp")) > return 0; > > - /* For __dma_alloc_coherent */ > + /* For __dma_nommu_alloc_coherent */ > ISA_DMA_THRESHOLD = ~0L; > > return 1; > -- > 2.19.1 > > _______________________________________________ > iommu mailing list > iommu@lists.linux-foundation.org > https://lists.linuxfoundation.org/mailman/listinfo/iommu ---end quoted text---
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 <linux/string.h> #include <linux/types.h> #include <linux/highmem.h> -#include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/export.h> #include <asm/tlbflush.h> @@ -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__, vaddr); dump_stack(); } -EXPORT_SYMBOL(__dma_free_coherent); /* * make an area consistent. @@ -401,7 +400,7 @@ EXPORT_SYMBOL(__dma_sync_page); /* * Return the PFN for a given cpu virtual address returned by - * __dma_alloc_coherent. This is used by dma_mmap_coherent() + * __dma_nommu_alloc_coherent. This is used by dma_mmap_coherent() */ unsigned long __dma_get_coherent_pfn(unsigned long cpu_addr) { diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c index a886c2c22097..7e4f8ca19ce8 100644 --- a/arch/powerpc/platforms/44x/warp.c +++ b/arch/powerpc/platforms/44x/warp.c @@ -47,7 +47,7 @@ static int __init warp_probe(void) if (!of_machine_is_compatible("pika,warp")) return 0; - /* For __dma_alloc_coherent */ + /* For __dma_nommu_alloc_coherent */ ISA_DMA_THRESHOLD = ~0L; return 1;