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author | Vitaly Andrianov <vitalya@ti.com> | 2012-12-05 09:29:25 -0500 |
---|---|---|
committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-12-11 09:28:09 +0100 |
commit | 4009793e15d44469da1547a46ab129cc08ffa503 (patch) | |
tree | 7d5e89b42669f647278d21284517f3256d051259 | |
parent | 387870f2d6d679746020fa8e25ef786ff338dc98 (diff) | |
download | linux-3.10-4009793e15d44469da1547a46ab129cc08ffa503.tar.gz linux-3.10-4009793e15d44469da1547a46ab129cc08ffa503.tar.bz2 linux-3.10-4009793e15d44469da1547a46ab129cc08ffa503.zip |
drivers: cma: represent physical addresses as phys_addr_t
This commit changes the CMA early initialization code to use phys_addr_t
for representing physical addresses instead of unsigned long.
Without this change, among other things, dma_declare_contiguous() simply
discards any memory regions whose address is not representable as unsigned
long.
This is a problem on 32-bit PAE machines where unsigned long is 32-bit
but physical address space is larger.
Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
-rw-r--r-- | drivers/base/dma-contiguous.c | 24 | ||||
-rw-r--r-- | include/linux/dma-contiguous.h | 4 |
2 files changed, 12 insertions, 16 deletions
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c index 612afcc5a93..0ca54421ce9 100644 --- a/drivers/base/dma-contiguous.c +++ b/drivers/base/dma-contiguous.c @@ -57,8 +57,8 @@ struct cma *dma_contiguous_default_area; * Users, who want to set the size of global CMA area for their system * should use cma= kernel parameter. */ -static const unsigned long size_bytes = CMA_SIZE_MBYTES * SZ_1M; -static long size_cmdline = -1; +static const phys_addr_t size_bytes = CMA_SIZE_MBYTES * SZ_1M; +static phys_addr_t size_cmdline = -1; static int __init early_cma(char *p) { @@ -70,7 +70,7 @@ early_param("cma", early_cma); #ifdef CONFIG_CMA_SIZE_PERCENTAGE -static unsigned long __init __maybe_unused cma_early_percent_memory(void) +static phys_addr_t __init __maybe_unused cma_early_percent_memory(void) { struct memblock_region *reg; unsigned long total_pages = 0; @@ -88,7 +88,7 @@ static unsigned long __init __maybe_unused cma_early_percent_memory(void) #else -static inline __maybe_unused unsigned long cma_early_percent_memory(void) +static inline __maybe_unused phys_addr_t cma_early_percent_memory(void) { return 0; } @@ -106,7 +106,7 @@ static inline __maybe_unused unsigned long cma_early_percent_memory(void) */ void __init dma_contiguous_reserve(phys_addr_t limit) { - unsigned long selected_size = 0; + phys_addr_t selected_size = 0; pr_debug("%s(limit %08lx)\n", __func__, (unsigned long)limit); @@ -126,7 +126,7 @@ void __init dma_contiguous_reserve(phys_addr_t limit) if (selected_size) { pr_debug("%s: reserving %ld MiB for global area\n", __func__, - selected_size / SZ_1M); + (unsigned long)selected_size / SZ_1M); dma_declare_contiguous(NULL, selected_size, 0, limit); } @@ -227,11 +227,11 @@ core_initcall(cma_init_reserved_areas); * called by board specific code when early allocator (memblock or bootmem) * is still activate. */ -int __init dma_declare_contiguous(struct device *dev, unsigned long size, +int __init dma_declare_contiguous(struct device *dev, phys_addr_t size, phys_addr_t base, phys_addr_t limit) { struct cma_reserved *r = &cma_reserved[cma_reserved_count]; - unsigned long alignment; + phys_addr_t alignment; pr_debug("%s(size %lx, base %08lx, limit %08lx)\n", __func__, (unsigned long)size, (unsigned long)base, @@ -268,10 +268,6 @@ int __init dma_declare_contiguous(struct device *dev, unsigned long size, if (!addr) { base = -ENOMEM; goto err; - } else if (addr + size > ~(unsigned long)0) { - memblock_free(addr, size); - base = -EINVAL; - goto err; } else { base = addr; } @@ -285,14 +281,14 @@ int __init dma_declare_contiguous(struct device *dev, unsigned long size, r->size = size; r->dev = dev; cma_reserved_count++; - pr_info("CMA: reserved %ld MiB at %08lx\n", size / SZ_1M, + pr_info("CMA: reserved %ld MiB at %08lx\n", (unsigned long)size / SZ_1M, (unsigned long)base); /* Architecture specific contiguous memory fixup. */ dma_contiguous_early_fixup(base, size); return 0; err: - pr_err("CMA: failed to reserve %ld MiB\n", size / SZ_1M); + pr_err("CMA: failed to reserve %ld MiB\n", (unsigned long)size / SZ_1M); return base; } diff --git a/include/linux/dma-contiguous.h b/include/linux/dma-contiguous.h index 2f303e4b7ed..01b5c84be82 100644 --- a/include/linux/dma-contiguous.h +++ b/include/linux/dma-contiguous.h @@ -68,7 +68,7 @@ struct device; extern struct cma *dma_contiguous_default_area; void dma_contiguous_reserve(phys_addr_t addr_limit); -int dma_declare_contiguous(struct device *dev, unsigned long size, +int dma_declare_contiguous(struct device *dev, phys_addr_t size, phys_addr_t base, phys_addr_t limit); struct page *dma_alloc_from_contiguous(struct device *dev, int count, @@ -83,7 +83,7 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages, static inline void dma_contiguous_reserve(phys_addr_t limit) { } static inline -int dma_declare_contiguous(struct device *dev, unsigned long size, +int dma_declare_contiguous(struct device *dev, phys_addr_t size, phys_addr_t base, phys_addr_t limit) { return -ENOSYS; |