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dma-mapping: make the get_required_mask method available unconditionally

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This save some duplication for ia64, and makes the interface more
general.  In the long run we want each dma_map_ops instance to fill this
out, but this will take a little more prep work.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Christoph Hellwig 2018-09-06 19:27:24 -04:00
parent b733116fea
commit c6d4381220
9 changed files with 13 additions and 48 deletions
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2
arch/ia64/include/asm/dma-mapping.h
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@ -10,8 +10,6 @@
#include <linux/scatterlist.h>
#include <linux/dma-debug.h>
#define ARCH_HAS_DMA_GET_REQUIRED_MASK
extern const struct dma_map_ops *dma_ops;
extern struct ia64_machine_vector ia64_mv;
extern void set_iommu_machvec(void);

7
arch/ia64/include/asm/machvec.h
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@ -44,7 +44,6 @@ typedef void ia64_mv_kernel_launch_event_t(void);
/* DMA-mapping interface: */
typedef void ia64_mv_dma_init (void);
typedef u64 ia64_mv_dma_get_required_mask (struct device *);
typedef const struct dma_map_ops *ia64_mv_dma_get_ops(struct device *);
/*
@ -127,7 +126,6 @@ extern void machvec_tlb_migrate_finish (struct mm_struct *);
# define platform_global_tlb_purge ia64_mv.global_tlb_purge
# define platform_tlb_migrate_finish ia64_mv.tlb_migrate_finish
# define platform_dma_init ia64_mv.dma_init
# define platform_dma_get_required_mask ia64_mv.dma_get_required_mask
# define platform_dma_get_ops ia64_mv.dma_get_ops
# define platform_irq_to_vector ia64_mv.irq_to_vector
# define platform_local_vector_to_irq ia64_mv.local_vector_to_irq
@ -171,7 +169,6 @@ struct ia64_machine_vector {
ia64_mv_global_tlb_purge_t *global_tlb_purge;
ia64_mv_tlb_migrate_finish_t *tlb_migrate_finish;
ia64_mv_dma_init *dma_init;
ia64_mv_dma_get_required_mask *dma_get_required_mask;
ia64_mv_dma_get_ops *dma_get_ops;
ia64_mv_irq_to_vector *irq_to_vector;
ia64_mv_local_vector_to_irq *local_vector_to_irq;
@ -211,7 +208,6 @@ struct ia64_machine_vector {
platform_global_tlb_purge, \
platform_tlb_migrate_finish, \
platform_dma_init, \
platform_dma_get_required_mask, \
platform_dma_get_ops, \
platform_irq_to_vector, \
platform_local_vector_to_irq, \
@ -286,9 +282,6 @@ extern const struct dma_map_ops *dma_get_ops(struct device *);
#ifndef platform_dma_get_ops
# define platform_dma_get_ops dma_get_ops
#endif
#ifndef platform_dma_get_required_mask
# define platform_dma_get_required_mask ia64_dma_get_required_mask
#endif
#ifndef platform_irq_to_vector
# define platform_irq_to_vector __ia64_irq_to_vector
#endif

1
arch/ia64/include/asm/machvec_init.h
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@ -4,7 +4,6 @@
extern ia64_mv_send_ipi_t ia64_send_ipi;
extern ia64_mv_global_tlb_purge_t ia64_global_tlb_purge;
extern ia64_mv_dma_get_required_mask ia64_dma_get_required_mask;
extern ia64_mv_irq_to_vector __ia64_irq_to_vector;
extern ia64_mv_local_vector_to_irq __ia64_local_vector_to_irq;
extern ia64_mv_pci_get_legacy_mem_t ia64_pci_get_legacy_mem;

2
arch/ia64/include/asm/machvec_sn2.h
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@ -55,7 +55,6 @@ extern ia64_mv_readb_t __sn_readb_relaxed;
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_get_required_mask sn_dma_get_required_mask;
extern ia64_mv_dma_init sn_dma_init;
extern ia64_mv_migrate_t sn_migrate;
extern ia64_mv_kernel_launch_event_t sn_kernel_launch_event;
@ -100,7 +99,6 @@ extern ia64_mv_pci_fixup_bus_t sn_pci_fixup_bus;
#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_get_required_mask sn_dma_get_required_mask
#define platform_dma_init sn_dma_init
#define platform_migrate sn_migrate
#define platform_kernel_launch_event sn_kernel_launch_event

26
arch/ia64/pci/pci.c
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@ -568,32 +568,6 @@ static void __init set_pci_dfl_cacheline_size(void)
pci_dfl_cache_line_size = (1 << cci.pcci_line_size) / 4;
}
u64 ia64_dma_get_required_mask(struct device *dev)
{
u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT);
u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT));
u64 mask;
if (!high_totalram) {
/* convert to mask just covering totalram */
low_totalram = (1 << (fls(low_totalram) - 1));
low_totalram += low_totalram - 1;
mask = low_totalram;
} else {
high_totalram = (1 << (fls(high_totalram) - 1));
high_totalram += high_totalram - 1;
mask = (((u64)high_totalram) << 32) + 0xffffffff;
}
return mask;
}
EXPORT_SYMBOL_GPL(ia64_dma_get_required_mask);
u64 dma_get_required_mask(struct device *dev)
{
return platform_dma_get_required_mask(dev);
}
EXPORT_SYMBOL_GPL(dma_get_required_mask);
static int __init pcibios_init(void)
{
set_pci_dfl_cacheline_size();

4
arch/ia64/sn/pci/pci_dma.c
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@ -344,11 +344,10 @@ static int sn_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
return 0;
}
u64 sn_dma_get_required_mask(struct device *dev)
static u64 sn_dma_get_required_mask(struct device *dev)
{
return DMA_BIT_MASK(64);
}
EXPORT_SYMBOL_GPL(sn_dma_get_required_mask);
char *sn_pci_get_legacy_mem(struct pci_bus *bus)
{
@ -473,6 +472,7 @@ static struct dma_map_ops sn_dma_ops = {
.sync_sg_for_device = sn_dma_sync_sg_for_device,
.mapping_error = sn_dma_mapping_error,
.dma_supported = sn_dma_supported,
.get_required_mask = sn_dma_get_required_mask,
};
void sn_dma_init(void)

13
drivers/base/platform.c
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@ -1179,8 +1179,7 @@ int __init platform_bus_init(void)
return error;
}
#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK
u64 dma_get_required_mask(struct device *dev)
static u64 dma_default_get_required_mask(struct device *dev)
{
u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT);
u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT));
@ -1198,6 +1197,16 @@ u64 dma_get_required_mask(struct device *dev)
}
return mask;
}
#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK
u64 dma_get_required_mask(struct device *dev)
{
const struct dma_map_ops *ops = get_dma_ops(dev);
if (ops->get_required_mask)
return ops->get_required_mask(dev);
return dma_default_get_required_mask(dev);
}
EXPORT_SYMBOL_GPL(dma_get_required_mask);
#endif

4
drivers/pci/controller/vmd.c
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@ -404,12 +404,10 @@ static int vmd_dma_supported(struct device *dev, u64 mask)
return vmd_dma_ops(dev)->dma_supported(to_vmd_dev(dev), mask);
}
#ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK
static u64 vmd_get_required_mask(struct device *dev)
{
return vmd_dma_ops(dev)->get_required_mask(to_vmd_dev(dev));
}
#endif
static void vmd_teardown_dma_ops(struct vmd_dev *vmd)
{
@ -450,9 +448,7 @@ static void vmd_setup_dma_ops(struct vmd_dev *vmd)
ASSIGN_VMD_DMA_OPS(source, dest, sync_sg_for_device);
ASSIGN_VMD_DMA_OPS(source, dest, mapping_error);
ASSIGN_VMD_DMA_OPS(source, dest, dma_supported);
#ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK
ASSIGN_VMD_DMA_OPS(source, dest, get_required_mask);
#endif
add_dma_domain(domain);
}
#undef ASSIGN_VMD_DMA_OPS

2
include/linux/dma-mapping.h
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@ -130,9 +130,7 @@ struct dma_map_ops {
enum dma_data_direction direction);
int (*mapping_error)(struct device *dev, dma_addr_t dma_addr);
int (*dma_supported)(struct device *dev, u64 mask);
#ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK
u64 (*get_required_mask)(struct device *dev);
#endif
};
extern const struct dma_map_ops dma_direct_ops;