diff options
| author | Christoph Hellwig <hch@lst.de> | 2006-06-06 16:11:35 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-06-09 13:24:01 +0200 |
| commit | 8eb6c6e3b9c8bfed3d75536ab142d7694627c2e5 (patch) | |
| tree | 7dd9c4146f60e88ca1fc8ebe976e1b7a3ae6ea2c /arch/powerpc/kernel/iommu.c | |
| parent | [PATCH] powerpc: implement pcibus_to_node and pcibus_to_cpumask (diff) | |
| download | linux-8eb6c6e3b9c8bfed3d75536ab142d7694627c2e5.tar.xz linux-8eb6c6e3b9c8bfed3d75536ab142d7694627c2e5.zip | |
[PATCH] powerpc: node-aware dma allocations
Make sure dma_alloc_coherent allocates memory from the local node. This
is important on Cell where we avoid going through the slow cpu
interconnect.
Note: I could only test this patch on Cell, it should be verified on
some pseries machine by those that have the hardware.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/iommu.c')
| -rw-r--r-- | arch/powerpc/kernel/iommu.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 4eba60a32890..cbb794556d02 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -536,11 +536,12 @@ void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle, * to the dma address (mapping) of the first page. */ void *iommu_alloc_coherent(struct iommu_table *tbl, size_t size, - dma_addr_t *dma_handle, unsigned long mask, gfp_t flag) + dma_addr_t *dma_handle, unsigned long mask, gfp_t flag, int node) { void *ret = NULL; dma_addr_t mapping; unsigned int npages, order; + struct page *page; size = PAGE_ALIGN(size); npages = size >> PAGE_SHIFT; @@ -560,9 +561,10 @@ void *iommu_alloc_coherent(struct iommu_table *tbl, size_t size, return NULL; /* Alloc enough pages (and possibly more) */ - ret = (void *)__get_free_pages(flag, order); - if (!ret) + page = alloc_pages_node(flag, order, node); + if (!page) return NULL; + ret = page_address(page); memset(ret, 0, size); /* Set up tces to cover the allocated range */ @@ -570,9 +572,9 @@ void *iommu_alloc_coherent(struct iommu_table *tbl, size_t size, mask >> PAGE_SHIFT, order); if (mapping == DMA_ERROR_CODE) { free_pages((unsigned long)ret, order); - ret = NULL; - } else - *dma_handle = mapping; + return NULL; + } + *dma_handle = mapping; return ret; } |