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Merge tag 'dma-mapping-4.16' of git://git.infradead.org/users/hch/dma-mapping

Browse Source 
Pull dma mapping updates from Christoph Hellwig:
 "Except for a runtime warning fix from Christian this is all about
  consolidation of the generic no-IOMMU code, a well as the glue code
  for swiotlb.

  All the code is based on the x86 implementation with hooks to allow
  all architectures that aren't cache coherent to use it.

  The x86 conversion itself has been deferred because the x86
  maintainers were a little busy in the last months"

* tag 'dma-mapping-4.16' of git://git.infradead.org/users/hch/dma-mapping: (57 commits)
  MAINTAINERS: add the iommu list for swiotlb and xen-swiotlb
  arm64: use swiotlb_alloc and swiotlb_free
  arm64: replace ZONE_DMA with ZONE_DMA32
  mips: use swiotlb_{alloc,free}
  mips/netlogic: remove swiotlb support
  tile: use generic swiotlb_ops
  tile: replace ZONE_DMA with ZONE_DMA32
  unicore32: use generic swiotlb_ops
  ia64: remove an ifdef around the content of pci-dma.c
  ia64: clean up swiotlb support
  ia64: use generic swiotlb_ops
  ia64: replace ZONE_DMA with ZONE_DMA32
  swiotlb: remove various exports
  swiotlb: refactor coherent buffer allocation
  swiotlb: refactor coherent buffer freeing
  swiotlb: wire up ->dma_supported in swiotlb_dma_ops
  swiotlb: add common swiotlb_map_ops
  swiotlb: rename swiotlb_free to swiotlb_exit
  x86: rename swiotlb_dma_ops
  powerpc: rename swiotlb_dma_ops
  ...
This commit is contained in:
Linus Torvalds
2018-01-31 11:32:27 -08:00
parent 28bc6fb959 04f5653478
commit 2382dc9a3e
119 changed files with 731 additions and 1269 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/ia64/Kconfig
View File

@@ -33,6 +33,7 @@ config IA64
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_VIRT_CPU_ACCOUNTING
select ARCH_HAS_DMA_MARK_CLEAN
select ARCH_HAS_SG_CHAIN
select VIRT_TO_BUS
select ARCH_DISCARD_MEMBLOCK
@@ -65,7 +66,7 @@ config 64BIT
select ATA_NONSTANDARD if ATA
default y
config ZONE_DMA
config ZONE_DMA32
def_bool y
depends on !IA64_SGI_SN2
@@ -145,6 +146,7 @@ config IA64_GENERIC
bool "generic"
select NUMA
select ACPI_NUMA
select DMA_DIRECT_OPS
select SWIOTLB
select PCI_MSI
help
@@ -165,6 +167,7 @@ config IA64_GENERIC
config IA64_DIG
bool "DIG-compliant"
select DMA_DIRECT_OPS
select SWIOTLB
config IA64_DIG_VTD
@@ -180,6 +183,7 @@ config IA64_HP_ZX1
config IA64_HP_ZX1_SWIOTLB
bool "HP-zx1/sx1000 with software I/O TLB"
select DMA_DIRECT_OPS
select SWIOTLB
help
Build a kernel that runs on HP zx1 and sx1000 systems even when they
@@ -203,6 +207,7 @@ config IA64_SGI_UV
bool "SGI-UV"
select NUMA
select ACPI_NUMA
select DMA_DIRECT_OPS
select SWIOTLB
help
Selecting this option will optimize the kernel for use on UV based
@@ -213,6 +218,7 @@ config IA64_SGI_UV
config IA64_HP_SIM
bool "Ski-simulator"
select DMA_DIRECT_OPS
select SWIOTLB
depends on !PM

2
arch/ia64/hp/common/hwsw_iommu.c
View File

@@ -19,7 +19,7 @@
#include <linux/export.h>
#include <asm/machvec.h>
extern const struct dma_map_ops sba_dma_ops, swiotlb_dma_ops;
extern const struct dma_map_ops sba_dma_ops;
/* swiotlb declarations & definitions: */
extern int swiotlb_late_init_with_default_size (size_t size);

19
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
@@ -27,22 +26,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
return platform_dma_get_ops(NULL);
}
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (!dev->dma_mask)
return 0;
return addr + size - 1 <= *dev->dma_mask;
}
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr;
}
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
return daddr;
}
#endif /* _ASM_IA64_DMA_MAPPING_H */

2
arch/ia64/include/asm/dma.h
View File

@@ -20,6 +20,4 @@ extern unsigned long MAX_DMA_ADDRESS;
#define free_dma(x)
void dma_mark_clean(void *addr, size_t size);
#endif /* _ASM_IA64_DMA_H */

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

19
arch/ia64/kernel/pci-dma.c
View File

@@ -12,12 +12,7 @@
#include <asm/iommu.h>
#include <asm/machvec.h>
#include <linux/dma-mapping.h>
#ifdef CONFIG_INTEL_IOMMU
#include <linux/kernel.h>
#include <asm/page.h>
dma_addr_t bad_dma_address __read_mostly;
@@ -104,8 +99,14 @@ 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

68
arch/ia64/kernel/pci-swiotlb.c
View File

@@ -1,68 +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 <asm/swiotlb.h>
#include <asm/dma.h>
#include <asm/iommu.h>
#include <asm/machvec.h>
int swiotlb __read_mostly;
EXPORT_SYMBOL(swiotlb);
static void *ia64_swiotlb_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp,
unsigned long attrs)
{
if (dev->coherent_dma_mask != DMA_BIT_MASK(64))
gfp |= GFP_DMA;
return swiotlb_alloc_coherent(dev, size, dma_handle, gfp);
}
static void ia64_swiotlb_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_addr,
unsigned long attrs)
{
swiotlb_free_coherent(dev, size, vaddr, dma_addr);
}
const struct dma_map_ops swiotlb_dma_ops = {
.alloc = ia64_swiotlb_alloc_coherent,
.free = ia64_swiotlb_free_coherent,
.map_page = swiotlb_map_page,
.unmap_page = swiotlb_unmap_page,
.map_sg = swiotlb_map_sg_attrs,
.unmap_sg = swiotlb_unmap_sg_attrs,
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
.sync_single_for_device = swiotlb_sync_single_for_device,
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = swiotlb_sync_sg_for_device,
.dma_supported = swiotlb_dma_supported,
.mapping_error = swiotlb_dma_mapping_error,
};
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
}
}

4
arch/ia64/mm/contig.c
View File

@@ -237,9 +237,9 @@ paging_init (void)
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
#ifdef CONFIG_ZONE_DMA
#ifdef CONFIG_ZONE_DMA32
max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
max_zone_pfns[ZONE_DMA] = max_dma;
max_zone_pfns[ZONE_DMA32] = max_dma;
#endif
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;

8
arch/ia64/mm/discontig.c
View File

@@ -38,7 +38,7 @@ struct early_node_data {
struct ia64_node_data *node_data;
unsigned long pernode_addr;
unsigned long pernode_size;
#ifdef CONFIG_ZONE_DMA
#ifdef CONFIG_ZONE_DMA32
unsigned long num_dma_physpages;
#endif
unsigned long min_pfn;
@@ -669,7 +669,7 @@ static __init int count_node_pages(unsigned long start, unsigned long len, int n
{
unsigned long end = start + len;
#ifdef CONFIG_ZONE_DMA
#ifdef CONFIG_ZONE_DMA32
if (start <= __pa(MAX_DMA_ADDRESS))
mem_data[node].num_dma_physpages +=
(min(end, __pa(MAX_DMA_ADDRESS)) - start) >>PAGE_SHIFT;
@@ -724,8 +724,8 @@ void __init paging_init(void)
}
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
#ifdef CONFIG_ZONE_DMA
max_zone_pfns[ZONE_DMA] = max_dma;
#ifdef CONFIG_ZONE_DMA32
max_zone_pfns[ZONE_DMA32] = max_dma;
#endif
max_zone_pfns[ZONE_NORMAL] = max_pfn;
free_area_init_nodes(max_zone_pfns);