diff options
Diffstat (limited to 'arch/parisc/kernel/pci-dma.c')
| -rw-r--r-- | arch/parisc/kernel/pci-dma.c | 199 |
1 files changed, 34 insertions, 165 deletions
diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c index 6df07ce4f3c2..04c48f1ef3fb 100644 --- a/arch/parisc/kernel/pci-dma.c +++ b/arch/parisc/kernel/pci-dma.c @@ -21,13 +21,12 @@ #include <linux/init.h> #include <linux/gfp.h> #include <linux/mm.h> -#include <linux/pci.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/string.h> #include <linux/types.h> -#include <linux/scatterlist.h> -#include <linux/export.h> +#include <linux/dma-direct.h> +#include <linux/dma-noncoherent.h> #include <asm/cacheflush.h> #include <asm/dma.h> /* for DMA_CHUNK_SIZE */ @@ -395,7 +394,7 @@ pcxl_dma_init(void) __initcall(pcxl_dma_init); -static void *pa11_dma_alloc(struct device *dev, size_t size, +static void *pcxl_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) { unsigned long vaddr; @@ -422,190 +421,60 @@ static void *pa11_dma_alloc(struct device *dev, size_t size, return (void *)vaddr; } -static void pa11_dma_free(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle, unsigned long attrs) +static void *pcx_dma_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) { - int order; - - order = get_order(size); - size = 1 << (order + PAGE_SHIFT); - unmap_uncached_pages((unsigned long)vaddr, size); - pcxl_free_range((unsigned long)vaddr, size); - free_pages((unsigned long)__va(dma_handle), order); -} + void *addr; -static dma_addr_t pa11_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction, unsigned long attrs) -{ - void *addr = page_address(page) + offset; - BUG_ON(direction == DMA_NONE); + if ((attrs & DMA_ATTR_NON_CONSISTENT) == 0) + return NULL; - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - flush_kernel_dcache_range((unsigned long) addr, size); + addr = (void *)__get_free_pages(flag, get_order(size)); + if (addr) + *dma_handle = (dma_addr_t)virt_to_phys(addr); - return virt_to_phys(addr); + return addr; } -static void pa11_dma_unmap_page(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction direction, - unsigned long attrs) +void *arch_dma_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { - BUG_ON(direction == DMA_NONE); - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return; - if (direction == DMA_TO_DEVICE) - return; - - /* - * For PCI_DMA_FROMDEVICE this flush is not necessary for the - * simple map/unmap case. However, it IS necessary if if - * pci_dma_sync_single_* has been called and the buffer reused. - */ - - flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), size); + if (boot_cpu_data.cpu_type == pcxl2 || boot_cpu_data.cpu_type == pcxl) + return pcxl_dma_alloc(dev, size, dma_handle, gfp, attrs); + else + return pcx_dma_alloc(dev, size, dma_handle, gfp, attrs); } -static int pa11_dma_map_sg(struct device *dev, struct scatterlist *sglist, - int nents, enum dma_data_direction direction, - unsigned long attrs) +void arch_dma_free(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle, unsigned long attrs) { - int i; - struct scatterlist *sg; - - BUG_ON(direction == DMA_NONE); + int order = get_order(size); - for_each_sg(sglist, sg, nents, i) { - unsigned long vaddr = (unsigned long)sg_virt(sg); + if (boot_cpu_data.cpu_type == pcxl2 || boot_cpu_data.cpu_type == pcxl) { + size = 1 << (order + PAGE_SHIFT); + unmap_uncached_pages((unsigned long)vaddr, size); + pcxl_free_range((unsigned long)vaddr, size); - sg_dma_address(sg) = (dma_addr_t) virt_to_phys(vaddr); - sg_dma_len(sg) = sg->length; - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - continue; - - flush_kernel_dcache_range(vaddr, sg->length); + vaddr = __va(dma_handle); } - return nents; -} - -static void pa11_dma_unmap_sg(struct device *dev, struct scatterlist *sglist, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - int i; - struct scatterlist *sg; - - BUG_ON(direction == DMA_NONE); - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return; - - if (direction == DMA_TO_DEVICE) - return; - - /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ - - for_each_sg(sglist, sg, nents, i) - flush_kernel_vmap_range(sg_virt(sg), sg->length); -} - -static void pa11_dma_sync_single_for_cpu(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(direction == DMA_NONE); - - flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), - size); -} - -static void pa11_dma_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(direction == DMA_NONE); - - flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), - size); + free_pages((unsigned long)vaddr, get_order(size)); } -static void pa11_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) +void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { - int i; - struct scatterlist *sg; - - /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ - - for_each_sg(sglist, sg, nents, i) - flush_kernel_vmap_range(sg_virt(sg), sg->length); + flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size); } -static void pa11_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) +void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) { - int i; - struct scatterlist *sg; - - /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */ - - for_each_sg(sglist, sg, nents, i) - flush_kernel_vmap_range(sg_virt(sg), sg->length); + flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size); } -static void pa11_dma_cache_sync(struct device *dev, void *vaddr, size_t size, +void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) { flush_kernel_dcache_range((unsigned long)vaddr, size); } - -const struct dma_map_ops pcxl_dma_ops = { - .alloc = pa11_dma_alloc, - .free = pa11_dma_free, - .map_page = pa11_dma_map_page, - .unmap_page = pa11_dma_unmap_page, - .map_sg = pa11_dma_map_sg, - .unmap_sg = pa11_dma_unmap_sg, - .sync_single_for_cpu = pa11_dma_sync_single_for_cpu, - .sync_single_for_device = pa11_dma_sync_single_for_device, - .sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, - .sync_sg_for_device = pa11_dma_sync_sg_for_device, - .cache_sync = pa11_dma_cache_sync, -}; - -static void *pcx_dma_alloc(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) -{ - void *addr; - - if ((attrs & DMA_ATTR_NON_CONSISTENT) == 0) - return NULL; - - addr = (void *)__get_free_pages(flag, get_order(size)); - if (addr) - *dma_handle = (dma_addr_t)virt_to_phys(addr); - - return addr; -} - -static void pcx_dma_free(struct device *dev, size_t size, void *vaddr, - dma_addr_t iova, unsigned long attrs) -{ - free_pages((unsigned long)vaddr, get_order(size)); - return; -} - -const struct dma_map_ops pcx_dma_ops = { - .alloc = pcx_dma_alloc, - .free = pcx_dma_free, - .map_page = pa11_dma_map_page, - .unmap_page = pa11_dma_unmap_page, - .map_sg = pa11_dma_map_sg, - .unmap_sg = pa11_dma_unmap_sg, - .sync_single_for_cpu = pa11_dma_sync_single_for_cpu, - .sync_single_for_device = pa11_dma_sync_single_for_device, - .sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu, - .sync_sg_for_device = pa11_dma_sync_sg_for_device, - .cache_sync = pa11_dma_cache_sync, -}; |