On Mon, Jun 3, 2019 at 2:54 PM Christoph Hellwig <[email protected]> wrote: > > Stop providing our own arch alloc/free hooks and just expose the segment > offset and use the generic dma-direct allocator. > > Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Ley Foon Tan <[email protected]> > --- > arch/nios2/Kconfig | 1 + > arch/nios2/include/asm/page.h | 6 ------ > arch/nios2/mm/dma-mapping.c | 34 +++++++++++++++------------------- > 3 files changed, 16 insertions(+), 25 deletions(-) > > diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig > index 26a9c760a98b..44b5da37e8bd 100644 > --- a/arch/nios2/Kconfig > +++ b/arch/nios2/Kconfig > @@ -4,6 +4,7 @@ config NIOS2 > select ARCH_32BIT_OFF_T > select ARCH_HAS_SYNC_DMA_FOR_CPU > select ARCH_HAS_SYNC_DMA_FOR_DEVICE > + select ARCH_HAS_UNCACHED_SEGMENT > select ARCH_NO_SWAP > select TIMER_OF > select GENERIC_ATOMIC64 > diff --git a/arch/nios2/include/asm/page.h b/arch/nios2/include/asm/page.h > index f1fbdc47bdaf..79fcac61f6ef 100644 > --- a/arch/nios2/include/asm/page.h > +++ b/arch/nios2/include/asm/page.h > @@ -101,12 +101,6 @@ static inline bool pfn_valid(unsigned long pfn) > # define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ > VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) > > -# define UNCAC_ADDR(addr) \ > - ((void *)((unsigned)(addr) | CONFIG_NIOS2_IO_REGION_BASE)) > -# define CAC_ADDR(addr) \ > - ((void *)(((unsigned)(addr) & ~CONFIG_NIOS2_IO_REGION_BASE) | \ > - CONFIG_NIOS2_KERNEL_REGION_BASE)) > - > #include <asm-generic/memory_model.h> > > #include <asm-generic/getorder.h> > diff --git a/arch/nios2/mm/dma-mapping.c b/arch/nios2/mm/dma-mapping.c > index 4af9e5b5ba1c..9cb238664584 100644 > --- a/arch/nios2/mm/dma-mapping.c > +++ b/arch/nios2/mm/dma-mapping.c > @@ -60,32 +60,28 @@ void arch_sync_dma_for_cpu(struct device *dev, > phys_addr_t paddr, > } > } > > -void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, > - gfp_t gfp, unsigned long attrs) > +void arch_dma_prep_coherent(struct page *page, size_t size) > { > - void *ret; > + unsigned long start = (unsigned long)page_address(page); > > - /* optimized page clearing */ > - gfp |= __GFP_ZERO; > + flush_dcache_range(start, start + size); > +} > > - if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff)) > - gfp |= GFP_DMA; > +void *uncached_kernel_address(void *ptr) > +{ > + unsigned long addr = (unsigned long)ptr; > > - ret = (void *) __get_free_pages(gfp, get_order(size)); > - if (ret != NULL) { > - *dma_handle = virt_to_phys(ret); > - flush_dcache_range((unsigned long) ret, > - (unsigned long) ret + size); > - ret = UNCAC_ADDR(ret); > - } > + addr |= CONFIG_NIOS2_IO_REGION_BASE; > > - return ret; > + return (void *)ptr; > } > > -void arch_dma_free(struct device *dev, size_t size, void *vaddr, > - dma_addr_t dma_handle, unsigned long attrs) > +void *cached_kernel_address(void *ptr) > { > - unsigned long addr = (unsigned long) CAC_ADDR((unsigned long) vaddr); > + unsigned long addr = (unsigned long)ptr; > + > + addr &= ~CONFIG_NIOS2_IO_REGION_BASE; > + addr |= CONFIG_NIOS2_KERNEL_REGION_BASE; > > - free_pages(addr, get_order(size)); > + return (void *)ptr; > } > -- > 2.20.1 >
