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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2014-06-05 01:06:53 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-05 01:53:57 +0200 |
| commit | 2bfc2862c4fe38379a2fb2cfba33fad32ccb4ff4 (patch) | |
| tree | 1413260b509c37c05857525e7327fa5985ca8375 | |
| parent | intel-iommu: integrate DMA CMA (diff) | |
| download | linux-2bfc2862c4fe38379a2fb2cfba33fad32ccb4ff4.tar.xz linux-2bfc2862c4fe38379a2fb2cfba33fad32ccb4ff4.zip | |
memblock: introduce memblock_alloc_range()
This introduces memblock_alloc_range() which allocates memblock from the
specified range of physical address. I would like to use this function
to specify the location of CMA.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Don Dutile <ddutile@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/memblock.h | 2 | ||||
| -rw-r--r-- | mm/memblock.c | 21 |
2 files changed, 19 insertions, 4 deletions
diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 73dc382e72d8..b660e05b63d4 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -272,6 +272,8 @@ static inline bool memblock_bottom_up(void) { return false; } #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) #define MEMBLOCK_ALLOC_ACCESSIBLE 0 +phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, + phys_addr_t start, phys_addr_t end); phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr); phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, diff --git a/mm/memblock.c b/mm/memblock.c index a810ba923cdd..146736411318 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1033,22 +1033,35 @@ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, } #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ -static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, - phys_addr_t align, phys_addr_t max_addr, - int nid) +static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, + phys_addr_t align, phys_addr_t start, + phys_addr_t end, int nid) { phys_addr_t found; if (!align) align = SMP_CACHE_BYTES; - found = memblock_find_in_range_node(size, align, 0, max_addr, nid); + found = memblock_find_in_range_node(size, align, start, end, nid); if (found && !memblock_reserve(found, size)) return found; return 0; } +phys_addr_t __init memblock_alloc_range(phys_addr_t size, phys_addr_t align, + phys_addr_t start, phys_addr_t end) +{ + return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE); +} + +static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size, + phys_addr_t align, phys_addr_t max_addr, + int nid) +{ + return memblock_alloc_range_nid(size, align, 0, max_addr, nid); +} + phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid) { return memblock_alloc_base_nid(size, align, MEMBLOCK_ALLOC_ACCESSIBLE, nid); |