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x86: GART: Convert gart_iommu_hole_init() to use iommu_init hook 

This changes gart_iommu_hole_init() to set gart_iommu_init() to
iommu_init hook if gart_iommu_hole_init() finds the GART IOMMU.

We can kill the code to check if we found the IOMMU in
gart_iommu_init() since gart_iommu_hole_init() sets
gart_iommu_init() only when it found the IOMMU.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: chrisw@sous-sol.org
Cc: dwmw2@infradead.org
Cc: joerg.roedel@amd.com
Cc: muli@il.ibm.com
LKML-Reference: <1257849980-22640-4-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
FUJITA Tomonori 2009-11-10 19:46:14 +09:00 committed by Ingo Molnar
parent d7b9f7be21
commit de957628ce
4 changed files with 8 additions and 16 deletions
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5
arch/x86/include/asm/gart.h
View File

@ -35,7 +35,7 @@ extern int gart_iommu_aperture_allowed;
extern int gart_iommu_aperture_disabled;
extern void early_gart_iommu_check(void);
extern void gart_iommu_init(void);
extern int gart_iommu_init(void);
extern void __init gart_parse_options(char *);
extern void gart_iommu_hole_init(void);
@ -47,9 +47,6 @@ extern void gart_iommu_hole_init(void);
static inline void early_gart_iommu_check(void)
{
}
static inline void gart_iommu_init(void)
{
}
static inline void gart_parse_options(char *options)
{
}

2
arch/x86/kernel/aperture_64.c
View File

@ -28,6 +28,7 @@
#include <asm/pci-direct.h>
#include <asm/dma.h>
#include <asm/k8.h>
#include <asm/x86_init.h>
int gart_iommu_aperture;
int gart_iommu_aperture_disabled __initdata;
@ -400,6 +401,7 @@ void __init gart_iommu_hole_init(void)
iommu_detected = 1;
gart_iommu_aperture = 1;
x86_init.iommu.iommu_init = gart_iommu_init;
aper_order = (read_pci_config(bus, slot, 3, AMD64_GARTAPERTURECTL) >> 1) & 7;
aper_size = (32 * 1024 * 1024) << aper_order;

2
arch/x86/kernel/pci-dma.c
View File

@ -298,8 +298,6 @@ static int __init pci_iommu_init(void)
amd_iommu_init();
gart_iommu_init();
no_iommu_init();
return 0;
}

15
arch/x86/kernel/pci-gart_64.c
View File

@ -709,7 +709,7 @@ static void gart_iommu_shutdown(void)
}
}
void __init gart_iommu_init(void)
int __init gart_iommu_init(void)
{
struct agp_kern_info info;
unsigned long iommu_start;
@ -719,7 +719,7 @@ void __init gart_iommu_init(void)
long i;
if (cache_k8_northbridges() < 0 || num_k8_northbridges == 0)
return;
return 0;
#ifndef CONFIG_AGP_AMD64
no_agp = 1;
@ -731,13 +731,6 @@ void __init gart_iommu_init(void)
(agp_copy_info(agp_bridge, &info) < 0);
#endif
if (swiotlb)
return;
/* Did we detect a different HW IOMMU? */
if (iommu_detected && !gart_iommu_aperture)
return;
if (no_iommu ||
(!force_iommu && max_pfn <= MAX_DMA32_PFN) ||
!gart_iommu_aperture ||
@ -747,7 +740,7 @@ void __init gart_iommu_init(void)
"but GART IOMMU not available.\n");
printk(KERN_WARNING "falling back to iommu=soft.\n");
}
return;
return 0;
}
/* need to map that range */
@ -840,6 +833,8 @@ void __init gart_iommu_init(void)
flush_gart();
dma_ops = &gart_dma_ops;
x86_platform.iommu_shutdown = gart_iommu_shutdown;
return 0;
}
void __init gart_parse_options(char *p)