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ia64: clean up swiotlb support 

Move the few remaining bits of swiotlb glue towards their callers,
and remove the pointless on ia64 swiotlb variable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Christoph Hellwig 2017-12-24 13:57:08 +01:00
parent 543cea9acc
commit 4fac8076df
6 changed files with 20 additions and 58 deletions
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1
arch/ia64/include/asm/dma-mapping.h
View File

@ -8,7 +8,6 @@
*/
#include <asm/machvec.h>
#include <linux/scatterlist.h>
#include <asm/swiotlb.h>
#include <linux/dma-debug.h>
#define ARCH_HAS_DMA_GET_REQUIRED_MASK

18
arch/ia64/include/asm/swiotlb.h
View File

@ -1,18 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ASM_IA64__SWIOTLB_H
#define ASM_IA64__SWIOTLB_H
#include <linux/dma-mapping.h>
#include <linux/swiotlb.h>
#ifdef CONFIG_SWIOTLB
extern int swiotlb;
extern void pci_swiotlb_init(void);
#else
#define swiotlb 0
static inline void pci_swiotlb_init(void)
{
}
#endif
#endif /* ASM_IA64__SWIOTLB_H */

9
arch/ia64/kernel/dma-mapping.c
View File

@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/dma-mapping.h>
#include <linux/swiotlb.h>
#include <linux/export.h>
/* Set this to 1 if there is a HW IOMMU in the system */
@ -23,3 +24,11 @@ const struct dma_map_ops *dma_get_ops(struct device *dev)
return dma_ops;
}
EXPORT_SYMBOL(dma_get_ops);
#ifdef CONFIG_SWIOTLB
void __init swiotlb_dma_init(void)
{
dma_ops = &swiotlb_dma_ops;
swiotlb_init(1);
}
#endif

12
arch/ia64/kernel/pci-dma.c
View File

@ -104,8 +104,16 @@ void __init pci_iommu_alloc(void)
detect_intel_iommu();
#ifdef CONFIG_SWIOTLB
pci_swiotlb_init();
#endif
if (!iommu_detected) {
#ifdef CONFIG_IA64_GENERIC
printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
machvec_init("dig");
swiotlb_dma_init();
#else
panic("Unable to find Intel IOMMU");
#endif /* CONFIG_IA64_GENERIC */
}
#endif /* CONFIG_SWIOTLB */
}
#endif

36
arch/ia64/kernel/pci-swiotlb.c
View File

@ -1,36 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/* Glue code to lib/swiotlb.c */
#include <linux/pci.h>
#include <linux/gfp.h>
#include <linux/cache.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/swiotlb.h>
#include <asm/dma.h>
#include <asm/iommu.h>
#include <asm/machvec.h>
int swiotlb __read_mostly;
EXPORT_SYMBOL(swiotlb);
void __init swiotlb_dma_init(void)
{
dma_ops = &swiotlb_dma_ops;
swiotlb_init(1);
}
void __init pci_swiotlb_init(void)
{
if (!iommu_detected) {
#ifdef CONFIG_IA64_GENERIC
swiotlb = 1;
printk(KERN_INFO "PCI-DMA: Re-initialize machine vector.\n");
machvec_init("dig");
swiotlb_init(1);
dma_ops = &swiotlb_dma_ops;
#else
panic("Unable to find Intel IOMMU");
#endif
}
}

2
drivers/iommu/intel-iommu.c
View File

@ -4808,7 +4808,7 @@ int __init intel_iommu_init(void)
up_write(&dmar_global_lock);
pr_info("Intel(R) Virtualization Technology for Directed I/O\n");
#ifdef CONFIG_SWIOTLB
#if defined(CONFIG_X86) && defined(CONFIG_SWIOTLB)
swiotlb = 0;
#endif
dma_ops = &intel_dma_ops;