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authorYinghai Lu <yinghai@kernel.org>2010-10-11 10:40:25 -0700
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2010-10-11 17:08:36 -0400
commite79f86b2ef9c0a8c47225217c1018b7d3d90101c (patch)
tree53ba03cad303a566831fa03ebbfc408ab36ae36c /lib/swiotlb.c
parent03620b2d7545fee29ecd3bb270f206b9cff75e58 (diff)
downloadlinux-linaro-stable-e79f86b2ef9c0a8c47225217c1018b7d3d90101c.tar.gz
swiotlb: Use page alignment for early buffer allocation
We could call free_bootmem_late() if swiotlb is not used, and it will shrink to page alignment. So alloc them with page alignment at first, to avoid lose two pages before patch: [ 0.000000] memblock_x86_reserve_range: [00d3600000, 00d7600000] swiotlb buffer [ 0.000000] memblock_x86_reserve_range: [00d7e7ef40, 00d7e9ef40] swiotlb list [ 0.000000] memblock_x86_reserve_range: [00d7e3ef40, 00d7e7ef40] swiotlb orig_ad [ 0.000000] memblock_x86_reserve_range: [000008a000, 0000092000] swiotlb overflo after patch will get [ 0.000000] memblock_x86_reserve_range: [00d3600000, 00d7600000] swiotlb buffer [ 0.000000] memblock_x86_reserve_range: [00d7e7e000, 00d7e9e000] swiotlb list [ 0.000000] memblock_x86_reserve_range: [00d7e3e000, 00d7e7e000] swiotlb orig_ad [ 0.000000] memblock_x86_reserve_range: [000008a000, 0000092000] swiotlb overflo Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'lib/swiotlb.c')
-rw-r--r--lib/swiotlb.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index b237e649cd5d..7c06ee51a29a 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -147,16 +147,16 @@ void __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
* to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
* between io_tlb_start and io_tlb_end.
*/
- io_tlb_list = alloc_bootmem(io_tlb_nslabs * sizeof(int));
+ io_tlb_list = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
for (i = 0; i < io_tlb_nslabs; i++)
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
io_tlb_index = 0;
- io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(phys_addr_t));
+ io_tlb_orig_addr = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
/*
* Get the overflow emergency buffer
*/
- io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow);
+ io_tlb_overflow_buffer = alloc_bootmem_low_pages(PAGE_ALIGN(io_tlb_overflow));
if (!io_tlb_overflow_buffer)
panic("Cannot allocate SWIOTLB overflow buffer!\n");
if (verbose)
@@ -182,7 +182,7 @@ swiotlb_init_with_default_size(size_t default_size, int verbose)
/*
* Get IO TLB memory from the low pages
*/
- io_tlb_start = alloc_bootmem_low_pages(bytes);
+ io_tlb_start = alloc_bootmem_low_pages(PAGE_ALIGN(bytes));
if (!io_tlb_start)
panic("Cannot allocate SWIOTLB buffer");
@@ -308,13 +308,13 @@ void __init swiotlb_free(void)
get_order(io_tlb_nslabs << IO_TLB_SHIFT));
} else {
free_bootmem_late(__pa(io_tlb_overflow_buffer),
- io_tlb_overflow);
+ PAGE_ALIGN(io_tlb_overflow));
free_bootmem_late(__pa(io_tlb_orig_addr),
- io_tlb_nslabs * sizeof(phys_addr_t));
+ PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
free_bootmem_late(__pa(io_tlb_list),
- io_tlb_nslabs * sizeof(int));
+ PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
free_bootmem_late(__pa(io_tlb_start),
- io_tlb_nslabs << IO_TLB_SHIFT);
+ PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
}
}