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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-01-05 23:36:12 +0900
committerIngo Molnar <mingo@elte.hu>2009-01-06 14:06:50 +0100
commit4d9b977ca674dd40cfc1409a75cb73fca2cee423 (patch)
tree417f80889ab49c61c2258b157cfe993bdf8d8357 /arch/ia64/hp
parentc82e4417ace9a3a4dddf3332379c771c41040040 (diff)
downloadlinux-4d9b977ca674dd40cfc1409a75cb73fca2cee423.tar.bz2
set up dma_ops appropriately
This patch introduces a global pointer, dma_ops, which points to an appropriate dma_mapping_ops that the kernel should use. This is a common way to handle multiple dma_mapping_ops (X86, POWER, and SPARC). dma_ops is set in platform_dma_init. We also set it by hand where machvec_init is callev via subsys_initcall. - IA64_DIG_VTD uses vtd_dma_ops. - IA64_HP_ZX1 uses sba_dma_ops. - IA64_HP_ZX1_SWIOTLB uses hwsw_dma_ops. - IA64_SGI_SN2 uses sn_dma_ops. - The rest use swiotlb_dma_ops. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/ia64/hp')
-rw-r--r--arch/ia64/hp/common/hwsw_iommu.c3
-rw-r--r--arch/ia64/hp/common/sba_iommu.c9
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/ia64/hp/common/hwsw_iommu.c b/arch/ia64/hp/common/hwsw_iommu.c
index a40dcdd22eeb..22145ded58f6 100644
--- a/arch/ia64/hp/common/hwsw_iommu.c
+++ b/arch/ia64/hp/common/hwsw_iommu.c
@@ -56,9 +56,12 @@ use_swiotlb (struct device *dev)
return dev && dev->dma_mask && !hwiommu_dma_supported(dev, *dev->dma_mask);
}
+struct dma_mapping_ops hwsw_dma_ops;
+
void __init
hwsw_init (void)
{
+ dma_ops = &hwsw_dma_ops;
/* default to a smallish 2MB sw I/O TLB */
if (swiotlb_late_init_with_default_size (2 * (1<<20)) != 0) {
#ifdef CONFIG_IA64_GENERIC
diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c
index 655b9a17db93..e82870a76801 100644
--- a/arch/ia64/hp/common/sba_iommu.c
+++ b/arch/ia64/hp/common/sba_iommu.c
@@ -2065,6 +2065,8 @@ static struct acpi_driver acpi_sba_ioc_driver = {
},
};
+extern struct dma_mapping_ops swiotlb_dma_ops;
+
static int __init
sba_init(void)
{
@@ -2078,6 +2080,7 @@ sba_init(void)
* a successful kdump kernel boot is to use the swiotlb.
*/
if (is_kdump_kernel()) {
+ dma_ops = &swiotlb_dma_ops;
if (swiotlb_late_init_with_default_size(64 * (1<<20)) != 0)
panic("Unable to initialize software I/O TLB:"
" Try machvec=dig boot option");
@@ -2093,6 +2096,7 @@ sba_init(void)
* If we didn't find something sba_iommu can claim, we
* need to setup the swiotlb and switch to the dig machvec.
*/
+ dma_ops = &swiotlb_dma_ops;
if (swiotlb_late_init_with_default_size(64 * (1<<20)) != 0)
panic("Unable to find SBA IOMMU or initialize "
"software I/O TLB: Try machvec=dig boot option");
@@ -2196,3 +2200,8 @@ struct dma_mapping_ops sba_dma_ops = {
.dma_supported_op = sba_dma_supported,
.mapping_error = sba_dma_mapping_error,
};
+
+void sba_dma_init(void)
+{
+ dma_ops = &sba_dma_ops;
+}