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| author | Catalin Marinas <catalin.marinas@arm.com> | 2014-02-27 12:09:22 (GMT) |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-02-27 12:09:22 (GMT) |
| commit | 19e7640d1f2302c20df2733e3e3df49acb17189e (patch) | |
| tree | 2fcf864c556e32cc562f51efbd92ad8d96c8389b /arch/arm64 | |
| parent | 16fb1a9bec6126162560f159df449e4781560807 (diff) | |
| download | linux-19e7640d1f2302c20df2733e3e3df49acb17189e.tar.xz | |
arm64: Replace ZONE_DMA32 with ZONE_DMA
On arm64 we do not have two DMA zones, so it does not make sense to
implement ZONE_DMA32. This patch changes ZONE_DMA32 with ZONE_DMA, the
latter covering 32-bit dma address space to honour GFP_DMA allocations.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 4 | ||||
| -rw-r--r-- | arch/arm64/mm/init.c | 31 |
3 files changed, 19 insertions, 18 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 0cb33a2..33e8f84 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -86,7 +86,7 @@ config GENERIC_CSUM config GENERIC_CALIBRATE_DELAY def_bool y -config ZONE_DMA32 +config ZONE_DMA def_bool y config ARCH_DMA_ADDR_T_64BIT diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index 985fc07..26b2512c 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -39,9 +39,9 @@ static void *__dma_alloc_coherent(struct device *dev, size_t size, return NULL; } - if (IS_ENABLED(CONFIG_ZONE_DMA32) && + if (IS_ENABLED(CONFIG_ZONE_DMA) && dev->coherent_dma_mask <= DMA_BIT_MASK(32)) - flags |= GFP_DMA32; + flags |= GFP_DMA; if (IS_ENABLED(CONFIG_DMA_CMA)) { struct page *page; diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index d0b4c2e..a61a4d5 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -30,6 +30,7 @@ #include <linux/memblock.h> #include <linux/sort.h> #include <linux/of_fdt.h> +#include <linux/dma-mapping.h> #include <linux/dma-contiguous.h> #include <asm/sections.h> @@ -59,22 +60,22 @@ static int __init early_initrd(char *p) early_param("initrd", early_initrd); #endif -#define MAX_DMA32_PFN ((4UL * 1024 * 1024 * 1024) >> PAGE_SHIFT) - static void __init zone_sizes_init(unsigned long min, unsigned long max) { struct memblock_region *reg; unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES]; - unsigned long max_dma32 = min; + unsigned long max_dma = min; memset(zone_size, 0, sizeof(zone_size)); -#ifdef CONFIG_ZONE_DMA32 /* 4GB maximum for 32-bit only capable devices */ - max_dma32 = max(min, min(max, MAX_DMA32_PFN)); - zone_size[ZONE_DMA32] = max_dma32 - min; -#endif - zone_size[ZONE_NORMAL] = max - max_dma32; + if (IS_ENABLED(CONFIG_ZONE_DMA)) { + unsigned long max_dma_phys = + (unsigned long)dma_to_phys(NULL, DMA_BIT_MASK(32) + 1); + max_dma = max(min, min(max, max_dma_phys >> PAGE_SHIFT)); + zone_size[ZONE_DMA] = max_dma - min; + } + zone_size[ZONE_NORMAL] = max - max_dma; memcpy(zhole_size, zone_size, sizeof(zhole_size)); @@ -84,15 +85,15 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max) if (start >= max) continue; -#ifdef CONFIG_ZONE_DMA32 - if (start < max_dma32) { - unsigned long dma_end = min(end, max_dma32); - zhole_size[ZONE_DMA32] -= dma_end - start; + + if (IS_ENABLED(CONFIG_ZONE_DMA) && start < max_dma) { + unsigned long dma_end = min(end, max_dma); + zhole_size[ZONE_DMA] -= dma_end - start; } -#endif - if (end > max_dma32) { + + if (end > max_dma) { unsigned long normal_end = min(end, max); - unsigned long normal_start = max(start, max_dma32); + unsigned long normal_start = max(start, max_dma); zhole_size[ZONE_NORMAL] -= normal_end - normal_start; } } |