linux-stable/arch/ia64/kernel/dma-mapping.c

#include <linux/dma-mapping.h>

struct dma_mapping_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);

struct dma_mapping_ops *dma_get_ops(struct device *dev)
{
	return dma_ops;
}
EXPORT_SYMBOL(dma_get_ops);
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> 2009-01-05 14:36:12 +00:00			`#include <linux/dma-mapping.h>`

			`struct dma_mapping_ops *dma_ops;`
			`EXPORT_SYMBOL(dma_ops);`
add dma_get_ops to struct ia64_machine_vector This adds dma_get_ops hook to struct ia64_machine_vector. We use dma_get_ops() in arch/ia64/kernel/dma-mapping.c, which simply returns the global dma_ops. This is for removing hwsw_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> 2009-01-05 14:36:16 +00:00
			`struct dma_mapping_ops dma_get_ops(struct device dev)`
			`{`
			`return dma_ops;`
			`}`
			`EXPORT_SYMBOL(dma_get_ops);`