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>
diff --git a/arch/ia64/include/asm/machvec.h b/arch/ia64/include/asm/machvec.h
index 59c17e4..d40722c 100644
--- a/arch/ia64/include/asm/machvec.h
+++ b/arch/ia64/include/asm/machvec.h
@@ -298,6 +298,8 @@
# error Unknown configuration. Update arch/ia64/include/asm/machvec.h.
# endif /* CONFIG_IA64_GENERIC */
+extern void swiotlb_dma_init(void);
+
/*
* Define default versions so we can extend machvec for new platforms without having
* to update the machvec files for all existing platforms.
@@ -328,7 +330,7 @@
# define platform_kernel_launch_event machvec_noop
#endif
#ifndef platform_dma_init
-# define platform_dma_init swiotlb_init
+# define platform_dma_init swiotlb_dma_init
#endif
#ifndef platform_dma_alloc_coherent
# define platform_dma_alloc_coherent swiotlb_alloc_coherent
diff --git a/arch/ia64/include/asm/machvec_hpzx1.h b/arch/ia64/include/asm/machvec_hpzx1.h
index 2f57f51..dd4140b 100644
--- a/arch/ia64/include/asm/machvec_hpzx1.h
+++ b/arch/ia64/include/asm/machvec_hpzx1.h
@@ -2,6 +2,7 @@
#define _ASM_IA64_MACHVEC_HPZX1_h
extern ia64_mv_setup_t dig_setup;
+extern ia64_mv_dma_init sba_dma_init;
extern ia64_mv_dma_alloc_coherent sba_alloc_coherent;
extern ia64_mv_dma_free_coherent sba_free_coherent;
extern ia64_mv_dma_map_single_attrs sba_map_single_attrs;
@@ -20,7 +21,7 @@
*/
#define platform_name "hpzx1"
#define platform_setup dig_setup
-#define platform_dma_init machvec_noop
+#define platform_dma_init sba_dma_init
#define platform_dma_alloc_coherent sba_alloc_coherent
#define platform_dma_free_coherent sba_free_coherent
#define platform_dma_map_single_attrs sba_map_single_attrs
diff --git a/arch/ia64/include/asm/machvec_sn2.h b/arch/ia64/include/asm/machvec_sn2.h
index 781308e..c1f6f87 100644
--- a/arch/ia64/include/asm/machvec_sn2.h
+++ b/arch/ia64/include/asm/machvec_sn2.h
@@ -55,6 +55,7 @@
extern ia64_mv_readw_t __sn_readw_relaxed;
extern ia64_mv_readl_t __sn_readl_relaxed;
extern ia64_mv_readq_t __sn_readq_relaxed;
+extern ia64_mv_dma_init sn_dma_init;
extern ia64_mv_dma_alloc_coherent sn_dma_alloc_coherent;
extern ia64_mv_dma_free_coherent sn_dma_free_coherent;
extern ia64_mv_dma_map_single_attrs sn_dma_map_single_attrs;
@@ -110,7 +111,7 @@
#define platform_pci_get_legacy_mem sn_pci_get_legacy_mem
#define platform_pci_legacy_read sn_pci_legacy_read
#define platform_pci_legacy_write sn_pci_legacy_write
-#define platform_dma_init machvec_noop
+#define platform_dma_init sn_dma_init
#define platform_dma_alloc_coherent sn_dma_alloc_coherent
#define platform_dma_free_coherent sn_dma_free_coherent
#define platform_dma_map_single_attrs sn_dma_map_single_attrs